LCOV - code coverage report
Current view: top level - spdk/lib/nvmf - rdma.c (source / functions) Hit Total Coverage
Test: Combined Lines: 1694 2943 57.6 %
Date: 2024-12-14 11:03:25 Functions: 89 120 74.2 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 2624 14657 17.9 %

           Branch data     Line data    Source code
       1                 :            : /*   SPDX-License-Identifier: BSD-3-Clause
       2                 :            :  *   Copyright (C) 2016 Intel Corporation. All rights reserved.
       3                 :            :  *   Copyright (c) 2019-2021 Mellanox Technologies LTD. All rights reserved.
       4                 :            :  *   Copyright (c) 2021-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5                 :            :  */
       6                 :            : 
       7                 :            : #include "spdk/stdinc.h"
       8                 :            : 
       9                 :            : #include "spdk/config.h"
      10                 :            : #include "spdk/thread.h"
      11                 :            : #include "spdk/likely.h"
      12                 :            : #include "spdk/nvmf_transport.h"
      13                 :            : #include "spdk/string.h"
      14                 :            : #include "spdk/trace.h"
      15                 :            : #include "spdk/tree.h"
      16                 :            : #include "spdk/util.h"
      17                 :            : 
      18                 :            : #include "spdk_internal/assert.h"
      19                 :            : #include "spdk/log.h"
      20                 :            : #include "spdk_internal/rdma.h"
      21                 :            : 
      22                 :            : #include "nvmf_internal.h"
      23                 :            : #include "transport.h"
      24                 :            : 
      25                 :            : #include "spdk_internal/trace_defs.h"
      26                 :            : 
      27                 :            : struct spdk_nvme_rdma_hooks g_nvmf_hooks = {};
      28                 :            : const struct spdk_nvmf_transport_ops spdk_nvmf_transport_rdma;
      29                 :            : 
      30                 :            : /*
      31                 :            :  RDMA Connection Resource Defaults
      32                 :            :  */
      33                 :            : #define NVMF_DEFAULT_MSDBD              16
      34                 :            : #define NVMF_DEFAULT_TX_SGE             SPDK_NVMF_MAX_SGL_ENTRIES
      35                 :            : #define NVMF_DEFAULT_RSP_SGE            1
      36                 :            : #define NVMF_DEFAULT_RX_SGE             2
      37                 :            : 
      38                 :            : SPDK_STATIC_ASSERT(NVMF_DEFAULT_MSDBD <= SPDK_NVMF_MAX_SGL_ENTRIES,
      39                 :            :                    "MSDBD must not exceed SPDK_NVMF_MAX_SGL_ENTRIES");
      40                 :            : 
      41                 :            : /* The RDMA completion queue size */
      42                 :            : #define DEFAULT_NVMF_RDMA_CQ_SIZE       4096
      43                 :            : #define MAX_WR_PER_QP(queue_depth)      (queue_depth * 3 + 2)
      44                 :            : 
      45                 :            : static int g_spdk_nvmf_ibv_query_mask =
      46                 :            :         IBV_QP_STATE |
      47                 :            :         IBV_QP_PKEY_INDEX |
      48                 :            :         IBV_QP_PORT |
      49                 :            :         IBV_QP_ACCESS_FLAGS |
      50                 :            :         IBV_QP_AV |
      51                 :            :         IBV_QP_PATH_MTU |
      52                 :            :         IBV_QP_DEST_QPN |
      53                 :            :         IBV_QP_RQ_PSN |
      54                 :            :         IBV_QP_MAX_DEST_RD_ATOMIC |
      55                 :            :         IBV_QP_MIN_RNR_TIMER |
      56                 :            :         IBV_QP_SQ_PSN |
      57                 :            :         IBV_QP_TIMEOUT |
      58                 :            :         IBV_QP_RETRY_CNT |
      59                 :            :         IBV_QP_RNR_RETRY |
      60                 :            :         IBV_QP_MAX_QP_RD_ATOMIC;
      61                 :            : 
      62                 :            : enum spdk_nvmf_rdma_request_state {
      63                 :            :         /* The request is not currently in use */
      64                 :            :         RDMA_REQUEST_STATE_FREE = 0,
      65                 :            : 
      66                 :            :         /* Initial state when request first received */
      67                 :            :         RDMA_REQUEST_STATE_NEW,
      68                 :            : 
      69                 :            :         /* The request is queued until a data buffer is available. */
      70                 :            :         RDMA_REQUEST_STATE_NEED_BUFFER,
      71                 :            : 
      72                 :            :         /* The request is waiting on RDMA queue depth availability
      73                 :            :          * to transfer data from the host to the controller.
      74                 :            :          */
      75                 :            :         RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING,
      76                 :            : 
      77                 :            :         /* The request is currently transferring data from the host to the controller. */
      78                 :            :         RDMA_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER,
      79                 :            : 
      80                 :            :         /* The request is ready to execute at the block device */
      81                 :            :         RDMA_REQUEST_STATE_READY_TO_EXECUTE,
      82                 :            : 
      83                 :            :         /* The request is currently executing at the block device */
      84                 :            :         RDMA_REQUEST_STATE_EXECUTING,
      85                 :            : 
      86                 :            :         /* The request finished executing at the block device */
      87                 :            :         RDMA_REQUEST_STATE_EXECUTED,
      88                 :            : 
      89                 :            :         /* The request is waiting on RDMA queue depth availability
      90                 :            :          * to transfer data from the controller to the host.
      91                 :            :          */
      92                 :            :         RDMA_REQUEST_STATE_DATA_TRANSFER_TO_HOST_PENDING,
      93                 :            : 
      94                 :            :         /* The request is waiting on RDMA queue depth availability
      95                 :            :          * to send response to the host.
      96                 :            :          */
      97                 :            :         RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING,
      98                 :            : 
      99                 :            :         /* The request is ready to send a completion */
     100                 :            :         RDMA_REQUEST_STATE_READY_TO_COMPLETE,
     101                 :            : 
     102                 :            :         /* The request is currently transferring data from the controller to the host. */
     103                 :            :         RDMA_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST,
     104                 :            : 
     105                 :            :         /* The request currently has an outstanding completion without an
     106                 :            :          * associated data transfer.
     107                 :            :          */
     108                 :            :         RDMA_REQUEST_STATE_COMPLETING,
     109                 :            : 
     110                 :            :         /* The request completed and can be marked free. */
     111                 :            :         RDMA_REQUEST_STATE_COMPLETED,
     112                 :            : 
     113                 :            :         /* Terminator */
     114                 :            :         RDMA_REQUEST_NUM_STATES,
     115                 :            : };
     116                 :            : 
     117                 :            : static void
     118                 :        728 : nvmf_trace(void)
     119                 :            : {
     120                 :        728 :         spdk_trace_register_object(OBJECT_NVMF_RDMA_IO, 'r');
     121                 :        728 :         spdk_trace_register_description("RDMA_REQ_NEW", TRACE_RDMA_REQUEST_STATE_NEW,
     122                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 1,
     123                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     124                 :        728 :         spdk_trace_register_description("RDMA_REQ_NEED_BUFFER", TRACE_RDMA_REQUEST_STATE_NEED_BUFFER,
     125                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     126                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     127                 :        728 :         spdk_trace_register_description("RDMA_REQ_TX_PENDING_C2H",
     128                 :            :                                         TRACE_RDMA_REQUEST_STATE_DATA_TRANSFER_TO_HOST_PENDING,
     129                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     130                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     131                 :        728 :         spdk_trace_register_description("RDMA_REQ_TX_PENDING_H2C",
     132                 :            :                                         TRACE_RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING,
     133                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     134                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     135                 :        728 :         spdk_trace_register_description("RDMA_REQ_TX_H2C",
     136                 :            :                                         TRACE_RDMA_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER,
     137                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     138                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     139                 :        728 :         spdk_trace_register_description("RDMA_REQ_RDY_TO_EXECUTE",
     140                 :            :                                         TRACE_RDMA_REQUEST_STATE_READY_TO_EXECUTE,
     141                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     142                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     143                 :        728 :         spdk_trace_register_description("RDMA_REQ_EXECUTING",
     144                 :            :                                         TRACE_RDMA_REQUEST_STATE_EXECUTING,
     145                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     146                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     147                 :        728 :         spdk_trace_register_description("RDMA_REQ_EXECUTED",
     148                 :            :                                         TRACE_RDMA_REQUEST_STATE_EXECUTED,
     149                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     150                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     151                 :        728 :         spdk_trace_register_description("RDMA_REQ_RDY_TO_COMPL_PEND",
     152                 :            :                                         TRACE_RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING,
     153                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     154                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     155                 :        728 :         spdk_trace_register_description("RDMA_REQ_RDY_TO_COMPL",
     156                 :            :                                         TRACE_RDMA_REQUEST_STATE_READY_TO_COMPLETE,
     157                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     158                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     159                 :        728 :         spdk_trace_register_description("RDMA_REQ_COMPLETING_C2H",
     160                 :            :                                         TRACE_RDMA_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST,
     161                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     162                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     163                 :        728 :         spdk_trace_register_description("RDMA_REQ_COMPLETING",
     164                 :            :                                         TRACE_RDMA_REQUEST_STATE_COMPLETING,
     165                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     166                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     167                 :        728 :         spdk_trace_register_description("RDMA_REQ_COMPLETED",
     168                 :            :                                         TRACE_RDMA_REQUEST_STATE_COMPLETED,
     169                 :            :                                         OWNER_NONE, OBJECT_NVMF_RDMA_IO, 0,
     170                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "qpair");
     171                 :            : 
     172                 :        728 :         spdk_trace_register_description("RDMA_QP_CREATE", TRACE_RDMA_QP_CREATE,
     173                 :            :                                         OWNER_NONE, OBJECT_NONE, 0,
     174                 :            :                                         SPDK_TRACE_ARG_TYPE_INT, "");
     175                 :        728 :         spdk_trace_register_description("RDMA_IBV_ASYNC_EVENT", TRACE_RDMA_IBV_ASYNC_EVENT,
     176                 :            :                                         OWNER_NONE, OBJECT_NONE, 0,
     177                 :            :                                         SPDK_TRACE_ARG_TYPE_INT, "type");
     178                 :        728 :         spdk_trace_register_description("RDMA_CM_ASYNC_EVENT", TRACE_RDMA_CM_ASYNC_EVENT,
     179                 :            :                                         OWNER_NONE, OBJECT_NONE, 0,
     180                 :            :                                         SPDK_TRACE_ARG_TYPE_INT, "type");
     181                 :        728 :         spdk_trace_register_description("RDMA_QP_STATE_CHANGE", TRACE_RDMA_QP_STATE_CHANGE,
     182                 :            :                                         OWNER_NONE, OBJECT_NONE, 0,
     183                 :            :                                         SPDK_TRACE_ARG_TYPE_PTR, "state");
     184                 :        728 :         spdk_trace_register_description("RDMA_QP_DISCONNECT", TRACE_RDMA_QP_DISCONNECT,
     185                 :            :                                         OWNER_NONE, OBJECT_NONE, 0,
     186                 :            :                                         SPDK_TRACE_ARG_TYPE_INT, "");
     187                 :        728 :         spdk_trace_register_description("RDMA_QP_DESTROY", TRACE_RDMA_QP_DESTROY,
     188                 :            :                                         OWNER_NONE, OBJECT_NONE, 0,
     189                 :            :                                         SPDK_TRACE_ARG_TYPE_INT, "");
     190                 :        728 : }
     191                 :        783 : SPDK_TRACE_REGISTER_FN(nvmf_trace, "nvmf_rdma", TRACE_GROUP_NVMF_RDMA)
     192                 :            : 
     193                 :            : enum spdk_nvmf_rdma_wr_type {
     194                 :            :         RDMA_WR_TYPE_RECV,
     195                 :            :         RDMA_WR_TYPE_SEND,
     196                 :            :         RDMA_WR_TYPE_DATA,
     197                 :            : };
     198                 :            : 
     199                 :            : struct spdk_nvmf_rdma_wr {
     200                 :            :         /* Uses enum spdk_nvmf_rdma_wr_type */
     201                 :            :         uint8_t type;
     202                 :            : };
     203                 :            : 
     204                 :            : /* This structure holds commands as they are received off the wire.
     205                 :            :  * It must be dynamically paired with a full request object
     206                 :            :  * (spdk_nvmf_rdma_request) to service a request. It is separate
     207                 :            :  * from the request because RDMA does not appear to order
     208                 :            :  * completions, so occasionally we'll get a new incoming
     209                 :            :  * command when there aren't any free request objects.
     210                 :            :  */
     211                 :            : struct spdk_nvmf_rdma_recv {
     212                 :            :         struct ibv_recv_wr                      wr;
     213                 :            :         struct ibv_sge                          sgl[NVMF_DEFAULT_RX_SGE];
     214                 :            : 
     215                 :            :         struct spdk_nvmf_rdma_qpair             *qpair;
     216                 :            : 
     217                 :            :         /* In-capsule data buffer */
     218                 :            :         uint8_t                                 *buf;
     219                 :            : 
     220                 :            :         struct spdk_nvmf_rdma_wr                rdma_wr;
     221                 :            :         uint64_t                                receive_tsc;
     222                 :            : 
     223                 :            :         STAILQ_ENTRY(spdk_nvmf_rdma_recv)       link;
     224                 :            : };
     225                 :            : 
     226                 :            : struct spdk_nvmf_rdma_request_data {
     227                 :            :         struct ibv_send_wr              wr;
     228                 :            :         struct ibv_sge                  sgl[SPDK_NVMF_MAX_SGL_ENTRIES];
     229                 :            : };
     230                 :            : 
     231                 :            : struct spdk_nvmf_rdma_request {
     232                 :            :         struct spdk_nvmf_request                req;
     233                 :            : 
     234                 :            :         bool                                    fused_failed;
     235                 :            : 
     236                 :            :         struct spdk_nvmf_rdma_wr                data_wr;
     237                 :            :         struct spdk_nvmf_rdma_wr                rsp_wr;
     238                 :            : 
     239                 :            :         /* Uses enum spdk_nvmf_rdma_request_state */
     240                 :            :         uint8_t                                 state;
     241                 :            : 
     242                 :            :         /* Data offset in req.iov */
     243                 :            :         uint32_t                                offset;
     244                 :            : 
     245                 :            :         struct spdk_nvmf_rdma_recv              *recv;
     246                 :            : 
     247                 :            :         struct {
     248                 :            :                 struct  ibv_send_wr             wr;
     249                 :            :                 struct  ibv_sge                 sgl[NVMF_DEFAULT_RSP_SGE];
     250                 :            :         } rsp;
     251                 :            : 
     252                 :            :         uint16_t                                iovpos;
     253                 :            :         uint16_t                                num_outstanding_data_wr;
     254                 :            :         /* Used to split Write IO with multi SGL payload */
     255                 :            :         uint16_t                                num_remaining_data_wr;
     256                 :            :         uint64_t                                receive_tsc;
     257                 :            :         struct spdk_nvmf_rdma_request           *fused_pair;
     258                 :            :         STAILQ_ENTRY(spdk_nvmf_rdma_request)    state_link;
     259                 :            :         struct ibv_send_wr                      *remaining_tranfer_in_wrs;
     260                 :            :         struct ibv_send_wr                      *transfer_wr;
     261                 :            :         struct spdk_nvmf_rdma_request_data      data;
     262                 :            : };
     263                 :            : 
     264                 :            : struct spdk_nvmf_rdma_resource_opts {
     265                 :            :         struct spdk_nvmf_rdma_qpair     *qpair;
     266                 :            :         /* qp points either to an ibv_qp object or an ibv_srq object depending on the value of shared. */
     267                 :            :         void                            *qp;
     268                 :            :         struct spdk_rdma_mem_map        *map;
     269                 :            :         uint32_t                        max_queue_depth;
     270                 :            :         uint32_t                        in_capsule_data_size;
     271                 :            :         bool                            shared;
     272                 :            : };
     273                 :            : 
     274                 :            : struct spdk_nvmf_rdma_resources {
     275                 :            :         /* Array of size "max_queue_depth" containing RDMA requests. */
     276                 :            :         struct spdk_nvmf_rdma_request           *reqs;
     277                 :            : 
     278                 :            :         /* Array of size "max_queue_depth" containing RDMA recvs. */
     279                 :            :         struct spdk_nvmf_rdma_recv              *recvs;
     280                 :            : 
     281                 :            :         /* Array of size "max_queue_depth" containing 64 byte capsules
     282                 :            :          * used for receive.
     283                 :            :          */
     284                 :            :         union nvmf_h2c_msg                      *cmds;
     285                 :            : 
     286                 :            :         /* Array of size "max_queue_depth" containing 16 byte completions
     287                 :            :          * to be sent back to the user.
     288                 :            :          */
     289                 :            :         union nvmf_c2h_msg                      *cpls;
     290                 :            : 
     291                 :            :         /* Array of size "max_queue_depth * InCapsuleDataSize" containing
     292                 :            :          * buffers to be used for in capsule data.
     293                 :            :          */
     294                 :            :         void                                    *bufs;
     295                 :            : 
     296                 :            :         /* Receives that are waiting for a request object */
     297                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_recv)      incoming_queue;
     298                 :            : 
     299                 :            :         /* Queue to track free requests */
     300                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_request)   free_queue;
     301                 :            : };
     302                 :            : 
     303                 :            : typedef void (*spdk_nvmf_rdma_qpair_ibv_event)(struct spdk_nvmf_rdma_qpair *rqpair);
     304                 :            : 
     305                 :            : typedef void (*spdk_poller_destroy_cb)(void *ctx);
     306                 :            : 
     307                 :            : struct spdk_nvmf_rdma_ibv_event_ctx {
     308                 :            :         struct spdk_nvmf_rdma_qpair                     *rqpair;
     309                 :            :         spdk_nvmf_rdma_qpair_ibv_event                  cb_fn;
     310                 :            :         /* Link to other ibv events associated with this qpair */
     311                 :            :         STAILQ_ENTRY(spdk_nvmf_rdma_ibv_event_ctx)      link;
     312                 :            : };
     313                 :            : 
     314                 :            : struct spdk_nvmf_rdma_qpair {
     315                 :            :         struct spdk_nvmf_qpair                  qpair;
     316                 :            : 
     317                 :            :         struct spdk_nvmf_rdma_device            *device;
     318                 :            :         struct spdk_nvmf_rdma_poller            *poller;
     319                 :            : 
     320                 :            :         struct spdk_rdma_qp                     *rdma_qp;
     321                 :            :         struct rdma_cm_id                       *cm_id;
     322                 :            :         struct spdk_rdma_srq                    *srq;
     323                 :            :         struct rdma_cm_id                       *listen_id;
     324                 :            : 
     325                 :            :         /* Cache the QP number to improve QP search by RB tree. */
     326                 :            :         uint32_t                                qp_num;
     327                 :            : 
     328                 :            :         /* The maximum number of I/O outstanding on this connection at one time */
     329                 :            :         uint16_t                                max_queue_depth;
     330                 :            : 
     331                 :            :         /* The maximum number of active RDMA READ and ATOMIC operations at one time */
     332                 :            :         uint16_t                                max_read_depth;
     333                 :            : 
     334                 :            :         /* The maximum number of RDMA SEND operations at one time */
     335                 :            :         uint32_t                                max_send_depth;
     336                 :            : 
     337                 :            :         /* The current number of outstanding WRs from this qpair's
     338                 :            :          * recv queue. Should not exceed device->attr.max_queue_depth.
     339                 :            :          */
     340                 :            :         uint16_t                                current_recv_depth;
     341                 :            : 
     342                 :            :         /* The current number of active RDMA READ operations */
     343                 :            :         uint16_t                                current_read_depth;
     344                 :            : 
     345                 :            :         /* The current number of posted WRs from this qpair's
     346                 :            :          * send queue. Should not exceed max_send_depth.
     347                 :            :          */
     348                 :            :         uint32_t                                current_send_depth;
     349                 :            : 
     350                 :            :         /* The maximum number of SGEs per WR on the send queue */
     351                 :            :         uint32_t                                max_send_sge;
     352                 :            : 
     353                 :            :         /* The maximum number of SGEs per WR on the recv queue */
     354                 :            :         uint32_t                                max_recv_sge;
     355                 :            : 
     356                 :            :         struct spdk_nvmf_rdma_resources         *resources;
     357                 :            : 
     358                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_request)   pending_rdma_read_queue;
     359                 :            : 
     360                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_request)   pending_rdma_write_queue;
     361                 :            : 
     362                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_request)   pending_rdma_send_queue;
     363                 :            : 
     364                 :            :         /* Number of requests not in the free state */
     365                 :            :         uint32_t                                qd;
     366                 :            : 
     367                 :            :         RB_ENTRY(spdk_nvmf_rdma_qpair)          node;
     368                 :            : 
     369                 :            :         STAILQ_ENTRY(spdk_nvmf_rdma_qpair)      recv_link;
     370                 :            : 
     371                 :            :         STAILQ_ENTRY(spdk_nvmf_rdma_qpair)      send_link;
     372                 :            : 
     373                 :            :         /* IBV queue pair attributes: they are used to manage
     374                 :            :          * qp state and recover from errors.
     375                 :            :          */
     376                 :            :         enum ibv_qp_state                       ibv_state;
     377                 :            : 
     378                 :            :         /* Points to the a request that has fuse bits set to
     379                 :            :          * SPDK_NVME_CMD_FUSE_FIRST, when the qpair is waiting
     380                 :            :          * for the request that has SPDK_NVME_CMD_FUSE_SECOND.
     381                 :            :          */
     382                 :            :         struct spdk_nvmf_rdma_request           *fused_first;
     383                 :            : 
     384                 :            :         /*
     385                 :            :          * io_channel which is used to destroy qpair when it is removed from poll group
     386                 :            :          */
     387                 :            :         struct spdk_io_channel          *destruct_channel;
     388                 :            : 
     389                 :            :         /* List of ibv async events */
     390                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_ibv_event_ctx)     ibv_events;
     391                 :            : 
     392                 :            :         /* Lets us know that we have received the last_wqe event. */
     393                 :            :         bool                                    last_wqe_reached;
     394                 :            : 
     395                 :            :         /* Indicate that nvmf_rdma_close_qpair is called */
     396                 :            :         bool                                    to_close;
     397                 :            : };
     398                 :            : 
     399                 :            : struct spdk_nvmf_rdma_poller_stat {
     400                 :            :         uint64_t                                completions;
     401                 :            :         uint64_t                                polls;
     402                 :            :         uint64_t                                idle_polls;
     403                 :            :         uint64_t                                requests;
     404                 :            :         uint64_t                                request_latency;
     405                 :            :         uint64_t                                pending_free_request;
     406                 :            :         uint64_t                                pending_rdma_read;
     407                 :            :         uint64_t                                pending_rdma_write;
     408                 :            :         uint64_t                                pending_rdma_send;
     409                 :            :         struct spdk_rdma_qp_stats               qp_stats;
     410                 :            : };
     411                 :            : 
     412                 :            : struct spdk_nvmf_rdma_poller {
     413                 :            :         struct spdk_nvmf_rdma_device            *device;
     414                 :            :         struct spdk_nvmf_rdma_poll_group        *group;
     415                 :            : 
     416                 :            :         int                                     num_cqe;
     417                 :            :         int                                     required_num_wr;
     418                 :            :         struct ibv_cq                           *cq;
     419                 :            : 
     420                 :            :         /* The maximum number of I/O outstanding on the shared receive queue at one time */
     421                 :            :         uint16_t                                max_srq_depth;
     422                 :            :         bool                                    need_destroy;
     423                 :            : 
     424                 :            :         /* Shared receive queue */
     425                 :            :         struct spdk_rdma_srq                    *srq;
     426                 :            : 
     427                 :            :         struct spdk_nvmf_rdma_resources         *resources;
     428                 :            :         struct spdk_nvmf_rdma_poller_stat       stat;
     429                 :            : 
     430                 :            :         spdk_poller_destroy_cb                  destroy_cb;
     431                 :            :         void                                    *destroy_cb_ctx;
     432                 :            : 
     433                 :            :         RB_HEAD(qpairs_tree, spdk_nvmf_rdma_qpair) qpairs;
     434                 :            : 
     435                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_qpair)     qpairs_pending_recv;
     436                 :            : 
     437                 :            :         STAILQ_HEAD(, spdk_nvmf_rdma_qpair)     qpairs_pending_send;
     438                 :            : 
     439                 :            :         TAILQ_ENTRY(spdk_nvmf_rdma_poller)      link;
     440                 :            : };
     441                 :            : 
     442                 :            : struct spdk_nvmf_rdma_poll_group_stat {
     443                 :            :         uint64_t                                pending_data_buffer;
     444                 :            : };
     445                 :            : 
     446                 :            : struct spdk_nvmf_rdma_poll_group {
     447                 :            :         struct spdk_nvmf_transport_poll_group           group;
     448                 :            :         struct spdk_nvmf_rdma_poll_group_stat           stat;
     449                 :            :         TAILQ_HEAD(, spdk_nvmf_rdma_poller)             pollers;
     450                 :            :         TAILQ_ENTRY(spdk_nvmf_rdma_poll_group)          link;
     451                 :            : };
     452                 :            : 
     453                 :            : struct spdk_nvmf_rdma_conn_sched {
     454                 :            :         struct spdk_nvmf_rdma_poll_group *next_admin_pg;
     455                 :            :         struct spdk_nvmf_rdma_poll_group *next_io_pg;
     456                 :            : };
     457                 :            : 
     458                 :            : /* Assuming rdma_cm uses just one protection domain per ibv_context. */
     459                 :            : struct spdk_nvmf_rdma_device {
     460                 :            :         struct ibv_device_attr                  attr;
     461                 :            :         struct ibv_context                      *context;
     462                 :            : 
     463                 :            :         struct spdk_rdma_mem_map                *map;
     464                 :            :         struct ibv_pd                           *pd;
     465                 :            : 
     466                 :            :         int                                     num_srq;
     467                 :            :         bool                                    need_destroy;
     468                 :            :         bool                                    ready_to_destroy;
     469                 :            :         bool                                    is_ready;
     470                 :            : 
     471                 :            :         TAILQ_ENTRY(spdk_nvmf_rdma_device)      link;
     472                 :            : };
     473                 :            : 
     474                 :            : struct spdk_nvmf_rdma_port {
     475                 :            :         const struct spdk_nvme_transport_id     *trid;
     476                 :            :         struct rdma_cm_id                       *id;
     477                 :            :         struct spdk_nvmf_rdma_device            *device;
     478                 :            :         TAILQ_ENTRY(spdk_nvmf_rdma_port)        link;
     479                 :            : };
     480                 :            : 
     481                 :            : struct rdma_transport_opts {
     482                 :            :         int             num_cqe;
     483                 :            :         uint32_t        max_srq_depth;
     484                 :            :         bool            no_srq;
     485                 :            :         bool            no_wr_batching;
     486                 :            :         int             acceptor_backlog;
     487                 :            : };
     488                 :            : 
     489                 :            : struct spdk_nvmf_rdma_transport {
     490                 :            :         struct spdk_nvmf_transport      transport;
     491                 :            :         struct rdma_transport_opts      rdma_opts;
     492                 :            : 
     493                 :            :         struct spdk_nvmf_rdma_conn_sched conn_sched;
     494                 :            : 
     495                 :            :         struct rdma_event_channel       *event_channel;
     496                 :            : 
     497                 :            :         struct spdk_mempool             *data_wr_pool;
     498                 :            : 
     499                 :            :         struct spdk_poller              *accept_poller;
     500                 :            : 
     501                 :            :         /* fields used to poll RDMA/IB events */
     502                 :            :         nfds_t                  npoll_fds;
     503                 :            :         struct pollfd           *poll_fds;
     504                 :            : 
     505                 :            :         TAILQ_HEAD(, spdk_nvmf_rdma_device)     devices;
     506                 :            :         TAILQ_HEAD(, spdk_nvmf_rdma_port)       ports;
     507                 :            :         TAILQ_HEAD(, spdk_nvmf_rdma_poll_group) poll_groups;
     508                 :            : 
     509                 :            :         /* ports that are removed unexpectedly and need retry listen */
     510                 :            :         TAILQ_HEAD(, spdk_nvmf_rdma_port)               retry_ports;
     511                 :            : };
     512                 :            : 
     513                 :            : struct poller_manage_ctx {
     514                 :            :         struct spdk_nvmf_rdma_transport         *rtransport;
     515                 :            :         struct spdk_nvmf_rdma_poll_group        *rgroup;
     516                 :            :         struct spdk_nvmf_rdma_poller            *rpoller;
     517                 :            :         struct spdk_nvmf_rdma_device            *device;
     518                 :            : 
     519                 :            :         struct spdk_thread                      *thread;
     520                 :            :         volatile int                            *inflight_op_counter;
     521                 :            : };
     522                 :            : 
     523                 :            : static const struct spdk_json_object_decoder rdma_transport_opts_decoder[] = {
     524                 :            :         {
     525                 :            :                 "num_cqe", offsetof(struct rdma_transport_opts, num_cqe),
     526                 :            :                 spdk_json_decode_int32, true
     527                 :            :         },
     528                 :            :         {
     529                 :            :                 "max_srq_depth", offsetof(struct rdma_transport_opts, max_srq_depth),
     530                 :            :                 spdk_json_decode_uint32, true
     531                 :            :         },
     532                 :            :         {
     533                 :            :                 "no_srq", offsetof(struct rdma_transport_opts, no_srq),
     534                 :            :                 spdk_json_decode_bool, true
     535                 :            :         },
     536                 :            :         {
     537                 :            :                 "no_wr_batching", offsetof(struct rdma_transport_opts, no_wr_batching),
     538                 :            :                 spdk_json_decode_bool, true
     539                 :            :         },
     540                 :            :         {
     541                 :            :                 "acceptor_backlog", offsetof(struct rdma_transport_opts, acceptor_backlog),
     542                 :            :                 spdk_json_decode_int32, true
     543                 :            :         },
     544                 :            : };
     545                 :            : 
     546                 :            : static int
     547                 :   13249297 : nvmf_rdma_qpair_compare(struct spdk_nvmf_rdma_qpair *rqpair1, struct spdk_nvmf_rdma_qpair *rqpair2)
     548                 :            : {
     549   [ +  +  +  -  :   13249297 :         return rqpair1->qp_num < rqpair2->qp_num ? -1 : rqpair1->qp_num > rqpair2->qp_num;
          +  -  +  -  +  
          +  +  -  +  -  
             +  -  +  - ]
     550                 :            : }
     551                 :            : 
     552   [ +  +  +  +  :   13258382 : RB_GENERATE_STATIC(qpairs_tree, spdk_nvmf_rdma_qpair, node, nvmf_rdma_qpair_compare);
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     553                 :            : 
     554                 :            : static bool nvmf_rdma_request_process(struct spdk_nvmf_rdma_transport *rtransport,
     555                 :            :                                       struct spdk_nvmf_rdma_request *rdma_req);
     556                 :            : 
     557                 :            : static void _poller_submit_sends(struct spdk_nvmf_rdma_transport *rtransport,
     558                 :            :                                  struct spdk_nvmf_rdma_poller *rpoller);
     559                 :            : 
     560                 :            : static void _poller_submit_recvs(struct spdk_nvmf_rdma_transport *rtransport,
     561                 :            :                                  struct spdk_nvmf_rdma_poller *rpoller);
     562                 :            : 
     563                 :            : static void _nvmf_rdma_remove_destroyed_device(void *c);
     564                 :            : 
     565                 :            : static inline int
     566                 :       2052 : nvmf_rdma_check_ibv_state(enum ibv_qp_state state)
     567                 :            : {
     568         [ +  + ]:       2052 :         switch (state) {
     569                 :       2045 :         case IBV_QPS_RESET:
     570                 :            :         case IBV_QPS_INIT:
     571                 :            :         case IBV_QPS_RTR:
     572                 :            :         case IBV_QPS_RTS:
     573                 :            :         case IBV_QPS_SQD:
     574                 :            :         case IBV_QPS_SQE:
     575                 :            :         case IBV_QPS_ERR:
     576                 :       2046 :                 return 0;
     577                 :          5 :         default:
     578                 :          6 :                 return -1;
     579                 :            :         }
     580                 :          2 : }
     581                 :            : 
     582                 :            : static inline enum spdk_nvme_media_error_status_code
     583                 :          0 : nvmf_rdma_dif_error_to_compl_status(uint8_t err_type) {
     584                 :          0 :         enum spdk_nvme_media_error_status_code result;
     585   [ #  #  #  # ]:          0 :         switch (err_type)
     586                 :            :         {
     587                 :          0 :         case SPDK_DIF_REFTAG_ERROR:
     588                 :          0 :                 result = SPDK_NVME_SC_REFERENCE_TAG_CHECK_ERROR;
     589                 :          0 :                 break;
     590                 :          0 :         case SPDK_DIF_APPTAG_ERROR:
     591                 :          0 :                 result = SPDK_NVME_SC_APPLICATION_TAG_CHECK_ERROR;
     592                 :          0 :                 break;
     593                 :          0 :         case SPDK_DIF_GUARD_ERROR:
     594                 :          0 :                 result = SPDK_NVME_SC_GUARD_CHECK_ERROR;
     595                 :          0 :                 break;
     596                 :          0 :         default:
     597         [ #  # ]:          0 :                 SPDK_UNREACHABLE();
     598                 :            :         }
     599                 :            : 
     600                 :          0 :         return result;
     601                 :          0 : }
     602                 :            : 
     603                 :            : static enum ibv_qp_state
     604                 :       2058 : nvmf_rdma_update_ibv_state(struct spdk_nvmf_rdma_qpair *rqpair) {
     605                 :          3 :         enum ibv_qp_state old_state, new_state;
     606                 :         15 :         struct ibv_qp_attr qp_attr;
     607                 :         15 :         struct ibv_qp_init_attr init_attr;
     608                 :          3 :         int rc;
     609                 :            : 
     610   [ +  -  +  - ]:       2058 :         old_state = rqpair->ibv_state;
     611   [ +  -  +  -  :       2058 :         rc = ibv_query_qp(rqpair->rdma_qp->qp, &qp_attr,
             +  -  +  - ]
     612                 :          3 :                           g_spdk_nvmf_ibv_query_mask, &init_attr);
     613                 :            : 
     614         [ +  + ]:       2058 :         if (rc)
     615                 :            :         {
     616                 :          6 :                 SPDK_ERRLOG("Failed to get updated RDMA queue pair state!\n");
     617                 :          6 :                 return IBV_QPS_ERR + 1;
     618                 :            :         }
     619                 :            : 
     620                 :       2052 :         new_state = qp_attr.qp_state;
     621   [ +  -  +  - ]:       2052 :         rqpair->ibv_state = new_state;
     622   [ +  -  +  - ]:       2052 :         qp_attr.ah_attr.port_num = qp_attr.port_num;
     623                 :            : 
     624                 :       2052 :         rc = nvmf_rdma_check_ibv_state(new_state);
     625         [ +  + ]:       2052 :         if (rc)
     626                 :            :         {
     627   [ +  -  +  -  :          6 :                 SPDK_ERRLOG("QP#%d: bad state updated: %u, maybe hardware issue\n", rqpair->qpair.qid, new_state);
                   +  - ]
     628                 :            :                 /*
     629                 :            :                  * IBV_QPS_UNKNOWN undefined if lib version smaller than libibverbs-1.1.8
     630                 :            :                  * IBV_QPS_UNKNOWN is the enum element after IBV_QPS_ERR
     631                 :            :                  */
     632                 :          6 :                 return IBV_QPS_ERR + 1;
     633                 :            :         }
     634                 :            : 
     635         [ +  + ]:       2046 :         if (old_state != new_state)
     636                 :            :         {
     637   [ +  +  +  -  :       2046 :                 spdk_trace_record(TRACE_RDMA_QP_STATE_CHANGE, 0, 0, (uintptr_t)rqpair, new_state);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
     638                 :          1 :         }
     639                 :       2046 :         return new_state;
     640                 :          3 : }
     641                 :            : 
     642                 :            : /*
     643                 :            :  * Return data_wrs to pool starting from \b data_wr
     644                 :            :  * Request's own response and data WR are excluded
     645                 :            :  */
     646                 :            : static void
     647                 :    6753125 : _nvmf_rdma_request_free_data(struct spdk_nvmf_rdma_request *rdma_req,
     648                 :            :                              struct ibv_send_wr *data_wr,
     649                 :            :                              struct spdk_mempool *pool)
     650                 :            : {
     651                 :         35 :         struct spdk_nvmf_rdma_request_data      *work_requests[SPDK_NVMF_MAX_SGL_ENTRIES];
     652                 :          7 :         struct spdk_nvmf_rdma_request_data      *nvmf_data;
     653                 :          7 :         struct ibv_send_wr                      *next_send_wr;
     654         [ +  - ]:    6753125 :         uint64_t                                req_wrid = (uint64_t)&rdma_req->data_wr;
     655                 :    6753125 :         uint32_t                                num_wrs = 0;
     656                 :            : 
     657   [ +  +  +  +  :   13859188 :         while (data_wr && data_wr->wr_id == req_wrid) {
             +  -  +  + ]
     658                 :    7106063 :                 nvmf_data = SPDK_CONTAINEROF(data_wr, struct spdk_nvmf_rdma_request_data, wr);
     659   [ +  +  +  -  :    7106063 :                 memset(nvmf_data->sgl, 0, sizeof(data_wr->sg_list[0]) * data_wr->num_sge);
             +  -  +  - ]
     660   [ +  -  +  - ]:    7106063 :                 data_wr->num_sge = 0;
     661   [ +  -  +  - ]:    7106063 :                 next_send_wr = data_wr->next;
     662   [ +  +  +  -  :    7106063 :                 if (data_wr != &rdma_req->data.wr) {
                   +  + ]
     663   [ +  -  +  - ]:     365450 :                         data_wr->next = NULL;
     664   [ +  +  #  # ]:     365450 :                         assert(num_wrs < SPDK_NVMF_MAX_SGL_ENTRIES);
     665   [ +  -  +  -  :     365450 :                         work_requests[num_wrs] = nvmf_data;
                   +  - ]
     666                 :     365450 :                         num_wrs++;
     667                 :          1 :                 }
     668   [ +  +  +  +  :    7106063 :                 data_wr = (!next_send_wr || next_send_wr == &rdma_req->rsp.wr) ? NULL : next_send_wr;
             +  -  +  + ]
     669                 :            :         }
     670                 :            : 
     671         [ +  + ]:    6753125 :         if (num_wrs) {
     672                 :      83817 :                 spdk_mempool_put_bulk(pool, (void **) work_requests, num_wrs);
     673                 :          1 :         }
     674                 :    6753125 : }
     675                 :            : 
     676                 :            : static void
     677                 :    6740973 : nvmf_rdma_request_free_data(struct spdk_nvmf_rdma_request *rdma_req,
     678                 :            :                             struct spdk_nvmf_rdma_transport *rtransport)
     679                 :            : {
     680   [ +  -  +  - ]:    6740973 :         rdma_req->num_outstanding_data_wr = 0;
     681                 :            : 
     682   [ +  -  +  -  :    6740973 :         _nvmf_rdma_request_free_data(rdma_req, rdma_req->transfer_wr, rtransport->data_wr_pool);
             +  -  +  - ]
     683                 :            : 
     684   [ +  -  +  -  :    6740973 :         rdma_req->data.wr.next = NULL;
             +  -  +  - ]
     685   [ +  -  +  -  :    6740973 :         rdma_req->rsp.wr.next = NULL;
             +  -  +  - ]
     686                 :    6740973 : }
     687                 :            : 
     688                 :            : static void
     689                 :          0 : nvmf_rdma_dump_request(struct spdk_nvmf_rdma_request *req)
     690                 :            : {
     691   [ #  #  #  #  :          0 :         SPDK_ERRLOG("\t\tRequest Data From Pool: %d\n", req->req.data_from_pool);
             #  #  #  # ]
     692   [ #  #  #  #  :          0 :         if (req->req.cmd) {
             #  #  #  # ]
     693   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("\t\tRequest opcode: %d\n", req->req.cmd->nvmf_cmd.opcode);
          #  #  #  #  #  
                #  #  # ]
     694                 :          0 :         }
     695   [ #  #  #  #  :          0 :         if (req->recv) {
                   #  # ]
     696   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("\t\tRequest recv wr_id%lu\n", req->recv->wr.wr_id);
          #  #  #  #  #  
                      # ]
     697                 :          0 :         }
     698                 :          0 : }
     699                 :            : 
     700                 :            : static void
     701                 :          0 : nvmf_rdma_dump_qpair_contents(struct spdk_nvmf_rdma_qpair *rqpair)
     702                 :            : {
     703                 :          0 :         int i;
     704                 :            : 
     705   [ #  #  #  #  :          0 :         SPDK_ERRLOG("Dumping contents of queue pair (QID %d)\n", rqpair->qpair.qid);
                   #  # ]
     706   [ #  #  #  #  :          0 :         for (i = 0; i < rqpair->max_queue_depth; i++) {
             #  #  #  # ]
     707   [ #  #  #  #  :          0 :                 if (rqpair->resources->reqs[i].state != RDMA_REQUEST_STATE_FREE) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
     708   [ #  #  #  #  :          0 :                         nvmf_rdma_dump_request(&rqpair->resources->reqs[i]);
          #  #  #  #  #  
                      # ]
     709                 :          0 :                 }
     710                 :          0 :         }
     711                 :          0 : }
     712                 :            : 
     713                 :            : static void
     714                 :        258 : nvmf_rdma_resources_destroy(struct spdk_nvmf_rdma_resources *resources)
     715                 :            : {
     716   [ +  -  +  - ]:        258 :         spdk_free(resources->cmds);
     717   [ +  -  +  - ]:        258 :         spdk_free(resources->cpls);
     718   [ +  -  +  - ]:        258 :         spdk_free(resources->bufs);
     719   [ +  -  +  - ]:        258 :         spdk_free(resources->reqs);
     720   [ +  -  +  - ]:        258 :         spdk_free(resources->recvs);
     721                 :        258 :         free(resources);
     722                 :        258 : }
     723                 :            : 
     724                 :            : 
     725                 :            : static struct spdk_nvmf_rdma_resources *
     726                 :        258 : nvmf_rdma_resources_create(struct spdk_nvmf_rdma_resource_opts *opts)
     727                 :            : {
     728                 :          1 :         struct spdk_nvmf_rdma_resources         *resources;
     729                 :          1 :         struct spdk_nvmf_rdma_request           *rdma_req;
     730                 :          1 :         struct spdk_nvmf_rdma_recv              *rdma_recv;
     731                 :        258 :         struct spdk_rdma_qp                     *qp = NULL;
     732                 :        258 :         struct spdk_rdma_srq                    *srq = NULL;
     733                 :        258 :         struct ibv_recv_wr                      *bad_wr = NULL;
     734                 :          5 :         struct spdk_rdma_memory_translation     translation;
     735                 :          1 :         uint32_t                                i;
     736                 :        258 :         int                                     rc = 0;
     737                 :            : 
     738                 :        258 :         resources = calloc(1, sizeof(struct spdk_nvmf_rdma_resources));
     739         [ +  + ]:        258 :         if (!resources) {
     740                 :          0 :                 SPDK_ERRLOG("Unable to allocate resources for receive queue.\n");
     741                 :          0 :                 return NULL;
     742                 :            :         }
     743                 :            : 
     744   [ +  -  +  -  :        258 :         resources->reqs = spdk_zmalloc(opts->max_queue_depth * sizeof(*resources->reqs),
             +  -  +  - ]
     745                 :            :                                        0x1000, NULL, SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
     746   [ +  -  +  -  :        258 :         resources->recvs = spdk_zmalloc(opts->max_queue_depth * sizeof(*resources->recvs),
             +  -  +  - ]
     747                 :            :                                         0x1000, NULL, SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
     748   [ +  -  +  -  :        258 :         resources->cmds = spdk_zmalloc(opts->max_queue_depth * sizeof(*resources->cmds),
             +  -  +  - ]
     749                 :            :                                        0x1000, NULL, SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
     750   [ +  -  +  -  :        258 :         resources->cpls = spdk_zmalloc(opts->max_queue_depth * sizeof(*resources->cpls),
             +  -  +  - ]
     751                 :            :                                        0x1000, NULL, SPDK_ENV_LCORE_ID_ANY, SPDK_MALLOC_DMA);
     752                 :            : 
     753   [ +  -  +  -  :        258 :         if (opts->in_capsule_data_size > 0) {
                   -  + ]
     754   [ +  -  +  -  :        258 :                 resources->bufs = spdk_zmalloc(opts->max_queue_depth * opts->in_capsule_data_size,
          +  -  +  -  +  
                -  +  - ]
     755                 :            :                                                0x1000, NULL, SPDK_ENV_LCORE_ID_ANY,
     756                 :            :                                                SPDK_MALLOC_DMA);
     757                 :          1 :         }
     758                 :            : 
     759   [ +  -  +  -  :        259 :         if (!resources->reqs || !resources->recvs || !resources->cmds ||
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                      - ]
     760   [ +  -  +  -  :        258 :             !resources->cpls || (opts->in_capsule_data_size && !resources->bufs)) {
          +  +  +  -  +  
          -  +  -  +  -  
                   +  - ]
     761                 :          0 :                 SPDK_ERRLOG("Unable to allocate sufficient memory for RDMA queue.\n");
     762                 :          0 :                 goto cleanup;
     763                 :            :         }
     764                 :            : 
     765   [ +  +  +  +  :        258 :         SPDK_DEBUGLOG(rdma, "Command Array: %p Length: %lx\n",
          +  -  #  #  #  
             #  #  #  #  
                      # ]
     766                 :            :                       resources->cmds, opts->max_queue_depth * sizeof(*resources->cmds));
     767   [ +  +  +  +  :        258 :         SPDK_DEBUGLOG(rdma, "Completion Array: %p Length: %lx\n",
          +  -  #  #  #  
             #  #  #  #  
                      # ]
     768                 :            :                       resources->cpls, opts->max_queue_depth * sizeof(*resources->cpls));
     769   [ +  -  +  -  :        258 :         if (resources->bufs) {
                   -  + ]
     770   [ +  +  +  +  :        258 :                 SPDK_DEBUGLOG(rdma, "In Capsule Data Array: %p Length: %x\n",
          +  -  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
     771                 :            :                               resources->bufs, opts->max_queue_depth *
     772                 :            :                               opts->in_capsule_data_size);
     773                 :          1 :         }
     774                 :            : 
     775                 :            :         /* Initialize queues */
     776   [ +  -  +  -  :        258 :         STAILQ_INIT(&resources->incoming_queue);
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
     777   [ +  -  +  -  :        258 :         STAILQ_INIT(&resources->free_queue);
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
     778                 :            : 
     779   [ +  +  +  -  :        258 :         if (opts->shared) {
             +  -  +  - ]
     780   [ +  -  +  - ]:        258 :                 srq = (struct spdk_rdma_srq *)opts->qp;
     781                 :          1 :         } else {
     782   [ #  #  #  # ]:          0 :                 qp = (struct spdk_rdma_qp *)opts->qp;
     783                 :            :         }
     784                 :            : 
     785   [ +  +  +  -  :    1033218 :         for (i = 0; i < opts->max_queue_depth; i++) {
                   +  + ]
     786   [ +  -  +  -  :    1032960 :                 rdma_recv = &resources->recvs[i];
                   +  - ]
     787   [ +  -  +  -  :    1032960 :                 rdma_recv->qpair = opts->qpair;
             +  -  +  - ]
     788                 :            : 
     789                 :            :                 /* Set up memory to receive commands */
     790   [ +  -  +  -  :    1032960 :                 if (resources->bufs) {
                   +  - ]
     791   [ +  -  +  -  :    2065792 :                         rdma_recv->buf = (void *)((uintptr_t)resources->bufs + (i *
             +  -  +  - ]
     792   [ +  -  +  - ]:    1032960 :                                                   opts->in_capsule_data_size));
     793                 :        128 :                 }
     794                 :            : 
     795   [ +  -  +  -  :    1032960 :                 rdma_recv->rdma_wr.type = RDMA_WR_TYPE_RECV;
                   +  - ]
     796                 :            : 
     797   [ +  -  +  -  :    1032960 :                 rdma_recv->sgl[0].addr = (uintptr_t)&resources->cmds[i];
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
     798   [ +  -  +  -  :    1032960 :                 rdma_recv->sgl[0].length = sizeof(resources->cmds[i]);
          +  -  +  -  +  
                      - ]
     799   [ +  -  +  -  :    1032960 :                 rc = spdk_rdma_get_translation(opts->map, &resources->cmds[i], sizeof(resources->cmds[i]),
          +  -  +  -  +  
                      - ]
     800                 :            :                                                &translation);
     801         [ +  + ]:    1032960 :                 if (rc) {
     802                 :          0 :                         goto cleanup;
     803                 :            :                 }
     804   [ +  -  +  -  :    1032960 :                 rdma_recv->sgl[0].lkey = spdk_rdma_memory_translation_get_lkey(&translation);
          +  -  +  -  +  
                      - ]
     805   [ +  -  +  -  :    1032960 :                 rdma_recv->wr.num_sge = 1;
                   +  - ]
     806                 :            : 
     807   [ +  -  +  -  :    1032960 :                 if (rdma_recv->buf) {
                   -  + ]
     808   [ +  -  +  -  :    1032960 :                         rdma_recv->sgl[1].addr = (uintptr_t)rdma_recv->buf;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
     809   [ +  -  +  -  :    1032960 :                         rdma_recv->sgl[1].length = opts->in_capsule_data_size;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
     810   [ +  -  +  -  :    1032960 :                         rc = spdk_rdma_get_translation(opts->map, rdma_recv->buf, opts->in_capsule_data_size, &translation);
          +  -  +  -  +  
                -  +  - ]
     811         [ +  + ]:    1032960 :                         if (rc) {
     812                 :          0 :                                 goto cleanup;
     813                 :            :                         }
     814   [ +  -  +  -  :    1032960 :                         rdma_recv->sgl[1].lkey = spdk_rdma_memory_translation_get_lkey(&translation);
          +  -  +  -  +  
                      - ]
     815   [ +  -  +  -  :    1032960 :                         rdma_recv->wr.num_sge++;
                   +  - ]
     816                 :        128 :                 }
     817                 :            : 
     818   [ +  -  +  -  :    1032960 :                 rdma_recv->wr.wr_id = (uintptr_t)&rdma_recv->rdma_wr;
             +  -  +  - ]
     819   [ +  -  +  -  :    1032960 :                 rdma_recv->wr.sg_list = rdma_recv->sgl;
             +  -  +  - ]
     820         [ +  + ]:    1032960 :                 if (srq) {
     821         [ #  # ]:    1032192 :                         spdk_rdma_srq_queue_recv_wrs(srq, &rdma_recv->wr);
     822                 :          0 :                 } else {
     823         [ +  - ]:        768 :                         spdk_rdma_qp_queue_recv_wrs(qp, &rdma_recv->wr);
     824                 :            :                 }
     825                 :        128 :         }
     826                 :            : 
     827   [ +  +  +  -  :    1033218 :         for (i = 0; i < opts->max_queue_depth; i++) {
                   +  + ]
     828   [ +  -  +  -  :    1032960 :                 rdma_req = &resources->reqs[i];
                   +  - ]
     829                 :            : 
     830   [ +  +  +  -  :    1032960 :                 if (opts->qpair != NULL) {
                   +  - ]
     831   [ +  -  +  -  :        768 :                         rdma_req->req.qpair = &opts->qpair->qpair;
          +  -  +  -  +  
                -  +  - ]
     832                 :        128 :                 } else {
     833   [ #  #  #  #  :    1032192 :                         rdma_req->req.qpair = NULL;
                   #  # ]
     834                 :            :                 }
     835   [ +  -  +  -  :    1032960 :                 rdma_req->req.cmd = NULL;
                   +  - ]
     836   [ +  -  +  -  :    1032960 :                 rdma_req->req.iovcnt = 0;
                   +  - ]
     837   [ +  -  +  -  :    1032960 :                 rdma_req->req.stripped_data = NULL;
                   +  - ]
     838                 :            : 
     839                 :            :                 /* Set up memory to send responses */
     840   [ +  -  +  -  :    1032960 :                 rdma_req->req.rsp = &resources->cpls[i];
          +  -  +  -  +  
                -  +  - ]
     841                 :            : 
     842   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.sgl[0].addr = (uintptr_t)&resources->cpls[i];
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
     843   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.sgl[0].length = sizeof(resources->cpls[i]);
          +  -  +  -  +  
                      - ]
     844   [ +  -  +  -  :    1032960 :                 rc = spdk_rdma_get_translation(opts->map, &resources->cpls[i], sizeof(resources->cpls[i]),
          +  -  +  -  +  
                      - ]
     845                 :            :                                                &translation);
     846         [ +  + ]:    1032960 :                 if (rc) {
     847                 :          0 :                         goto cleanup;
     848                 :            :                 }
     849   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.sgl[0].lkey = spdk_rdma_memory_translation_get_lkey(&translation);
          +  -  +  -  +  
                      - ]
     850                 :            : 
     851   [ +  -  +  -  :    1032960 :                 rdma_req->rsp_wr.type = RDMA_WR_TYPE_SEND;
                   +  - ]
     852   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.wr.wr_id = (uintptr_t)&rdma_req->rsp_wr;
          +  -  +  -  +  
                      - ]
     853   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.wr.next = NULL;
             +  -  +  - ]
     854   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.wr.opcode = IBV_WR_SEND;
             +  -  +  - ]
     855   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.wr.send_flags = IBV_SEND_SIGNALED;
             +  -  +  - ]
     856   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.wr.sg_list = rdma_req->rsp.sgl;
          +  -  +  -  +  
                -  +  - ]
     857   [ +  -  +  -  :    1032960 :                 rdma_req->rsp.wr.num_sge = SPDK_COUNTOF(rdma_req->rsp.sgl);
             +  -  +  - ]
     858                 :            : 
     859                 :            :                 /* Set up memory for data buffers */
     860   [ +  -  +  -  :    1032960 :                 rdma_req->data_wr.type = RDMA_WR_TYPE_DATA;
                   +  - ]
     861   [ +  -  +  -  :    1032960 :                 rdma_req->data.wr.wr_id = (uintptr_t)&rdma_req->data_wr;
          +  -  +  -  +  
                      - ]
     862   [ +  -  +  -  :    1032960 :                 rdma_req->data.wr.next = NULL;
             +  -  +  - ]
     863   [ +  -  +  -  :    1032960 :                 rdma_req->data.wr.send_flags = IBV_SEND_SIGNALED;
             +  -  +  - ]
     864   [ +  -  +  -  :    1032960 :                 rdma_req->data.wr.sg_list = rdma_req->data.sgl;
          +  -  +  -  +  
                -  +  - ]
     865   [ +  -  +  -  :    1032960 :                 rdma_req->data.wr.num_sge = SPDK_COUNTOF(rdma_req->data.sgl);
             +  -  +  - ]
     866                 :            : 
     867                 :            :                 /* Initialize request state to FREE */
     868   [ +  -  +  - ]:    1032960 :                 rdma_req->state = RDMA_REQUEST_STATE_FREE;
     869   [ +  -  +  -  :    1032960 :                 STAILQ_INSERT_TAIL(&resources->free_queue, rdma_req, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
             -  +  -  +  
                      - ]
     870                 :        128 :         }
     871                 :            : 
     872         [ +  + ]:        258 :         if (srq) {
     873                 :        252 :                 rc = spdk_rdma_srq_flush_recv_wrs(srq, &bad_wr);
     874                 :          0 :         } else {
     875                 :          6 :                 rc = spdk_rdma_qp_flush_recv_wrs(qp, &bad_wr);
     876                 :            :         }
     877                 :            : 
     878         [ -  + ]:        258 :         if (rc) {
     879                 :          0 :                 goto cleanup;
     880                 :            :         }
     881                 :            : 
     882                 :        258 :         return resources;
     883                 :            : 
     884                 :          0 : cleanup:
     885                 :          0 :         nvmf_rdma_resources_destroy(resources);
     886                 :          0 :         return NULL;
     887                 :          1 : }
     888                 :            : 
     889                 :            : static void
     890                 :       2040 : nvmf_rdma_qpair_clean_ibv_events(struct spdk_nvmf_rdma_qpair *rqpair)
     891                 :            : {
     892                 :          0 :         struct spdk_nvmf_rdma_ibv_event_ctx *ctx, *tctx;
     893   [ -  +  #  #  :       2040 :         STAILQ_FOREACH_SAFE(ctx, &rqpair->ibv_events, link, tctx) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
     894   [ #  #  #  # ]:          0 :                 ctx->rqpair = NULL;
     895                 :            :                 /* Memory allocated for ctx is freed in nvmf_rdma_qpair_process_ibv_event */
     896   [ #  #  #  #  :          0 :                 STAILQ_REMOVE(&rqpair->ibv_events, ctx, spdk_nvmf_rdma_ibv_event_ctx, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
     897                 :          0 :         }
     898                 :       2040 : }
     899                 :            : 
     900                 :            : static void nvmf_rdma_poller_destroy(struct spdk_nvmf_rdma_poller *poller);
     901                 :            : 
     902                 :            : static void
     903                 :       2040 : nvmf_rdma_qpair_destroy(struct spdk_nvmf_rdma_qpair *rqpair)
     904                 :            : {
     905                 :          0 :         struct spdk_nvmf_rdma_recv      *rdma_recv, *recv_tmp;
     906                 :       2040 :         struct ibv_recv_wr              *bad_recv_wr = NULL;
     907                 :          0 :         int                             rc;
     908                 :            : 
     909   [ +  +  +  -  :       2040 :         spdk_trace_record(TRACE_RDMA_QP_DESTROY, 0, 0, (uintptr_t)rqpair);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
     910                 :            : 
     911   [ -  +  #  #  :       2040 :         if (rqpair->qd != 0) {
                   #  # ]
     912         [ #  # ]:          0 :                 struct spdk_nvmf_qpair *qpair = &rqpair->qpair;
     913   [ #  #  #  # ]:          0 :                 struct spdk_nvmf_rdma_transport *rtransport = SPDK_CONTAINEROF(qpair->transport,
     914                 :            :                                 struct spdk_nvmf_rdma_transport, transport);
     915                 :          0 :                 struct spdk_nvmf_rdma_request *req;
     916                 :          0 :                 uint32_t i, max_req_count = 0;
     917                 :            : 
     918   [ #  #  #  # ]:          0 :                 SPDK_WARNLOG("Destroying qpair when queue depth is %d\n", rqpair->qd);
     919                 :            : 
     920   [ #  #  #  #  :          0 :                 if (rqpair->srq == NULL) {
                   #  # ]
     921                 :          0 :                         nvmf_rdma_dump_qpair_contents(rqpair);
     922   [ #  #  #  # ]:          0 :                         max_req_count = rqpair->max_queue_depth;
     923   [ #  #  #  #  :          0 :                 } else if (rqpair->poller && rqpair->resources) {
          #  #  #  #  #  
                #  #  # ]
     924   [ #  #  #  #  :          0 :                         max_req_count = rqpair->poller->max_srq_depth;
             #  #  #  # ]
     925                 :          0 :                 }
     926                 :            : 
     927   [ #  #  #  #  :          0 :                 SPDK_DEBUGLOG(rdma, "Release incomplete requests\n");
                   #  # ]
     928         [ #  # ]:          0 :                 for (i = 0; i < max_req_count; i++) {
     929   [ #  #  #  #  :          0 :                         req = &rqpair->resources->reqs[i];
          #  #  #  #  #  
                      # ]
     930   [ #  #  #  #  :          0 :                         if (req->req.qpair == qpair && req->state != RDMA_REQUEST_STATE_FREE) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
     931                 :            :                                 /* nvmf_rdma_request_process checks qpair ibv and internal state
     932                 :            :                                  * and completes a request */
     933                 :          0 :                                 nvmf_rdma_request_process(rtransport, req);
     934                 :          0 :                         }
     935                 :          0 :                 }
     936   [ #  #  #  #  :          0 :                 assert(rqpair->qd == 0);
             #  #  #  # ]
     937                 :          0 :         }
     938                 :            : 
     939   [ +  -  #  #  :       2040 :         if (rqpair->poller) {
                   #  # ]
     940   [ #  #  #  #  :       2040 :                 RB_REMOVE(qpairs_tree, &rqpair->poller->qpairs, rqpair);
                   #  # ]
     941                 :            : 
     942   [ +  -  +  -  :       2040 :                 if (rqpair->srq != NULL && rqpair->resources != NULL) {
          #  #  #  #  #  
                #  #  # ]
     943                 :            :                         /* Drop all received but unprocessed commands for this queue and return them to SRQ */
     944   [ -  +  #  #  :       2040 :                         STAILQ_FOREACH_SAFE(rdma_recv, &rqpair->resources->incoming_queue, link, recv_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
     945   [ #  #  #  #  :          0 :                                 if (rqpair == rdma_recv->qpair) {
                   #  # ]
     946   [ #  #  #  #  :          0 :                                         STAILQ_REMOVE(&rqpair->resources->incoming_queue, rdma_recv, spdk_nvmf_rdma_recv, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
     947   [ #  #  #  #  :          0 :                                         spdk_rdma_srq_queue_recv_wrs(rqpair->srq, &rdma_recv->wr);
                   #  # ]
     948   [ #  #  #  # ]:          0 :                                         rc = spdk_rdma_srq_flush_recv_wrs(rqpair->srq, &bad_recv_wr);
     949         [ #  # ]:          0 :                                         if (rc) {
     950                 :          0 :                                                 SPDK_ERRLOG("Unable to re-post rx descriptor\n");
     951                 :          0 :                                         }
     952                 :          0 :                                 }
     953                 :          0 :                         }
     954                 :          0 :                 }
     955                 :          0 :         }
     956                 :            : 
     957   [ +  -  #  #  :       2040 :         if (rqpair->cm_id) {
                   #  # ]
     958   [ +  -  #  #  :       2040 :                 if (rqpair->rdma_qp != NULL) {
                   #  # ]
     959   [ #  #  #  # ]:       2040 :                         spdk_rdma_qp_destroy(rqpair->rdma_qp);
     960   [ #  #  #  # ]:       2040 :                         rqpair->rdma_qp = NULL;
     961                 :          0 :                 }
     962                 :            : 
     963   [ +  -  -  +  :       2040 :                 if (rqpair->poller != NULL && rqpair->srq == NULL) {
          #  #  #  #  #  
                #  #  # ]
     964   [ #  #  #  #  :          0 :                         rqpair->poller->required_num_wr -= MAX_WR_PER_QP(rqpair->max_queue_depth);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
     965                 :          0 :                 }
     966                 :          0 :         }
     967                 :            : 
     968   [ -  +  -  -  :       2040 :         if (rqpair->srq == NULL && rqpair->resources != NULL) {
          #  #  #  #  #  
                #  #  # ]
     969   [ #  #  #  # ]:          0 :                 nvmf_rdma_resources_destroy(rqpair->resources);
     970                 :          0 :         }
     971                 :            : 
     972                 :       2040 :         nvmf_rdma_qpair_clean_ibv_events(rqpair);
     973                 :            : 
     974   [ +  -  #  #  :       2040 :         if (rqpair->destruct_channel) {
                   #  # ]
     975   [ #  #  #  # ]:       2040 :                 spdk_put_io_channel(rqpair->destruct_channel);
     976   [ #  #  #  # ]:       2040 :                 rqpair->destruct_channel = NULL;
     977                 :          0 :         }
     978                 :            : 
     979   [ +  -  -  +  :       2040 :         if (rqpair->poller && rqpair->poller->need_destroy && RB_EMPTY(&rqpair->poller->qpairs)) {
          -  +  -  -  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
     980   [ #  #  #  # ]:          0 :                 nvmf_rdma_poller_destroy(rqpair->poller);
     981                 :          0 :         }
     982                 :            : 
     983                 :            :         /* destroy cm_id last so cma device will not be freed before we destroy the cq. */
     984   [ +  -  #  #  :       2040 :         if (rqpair->cm_id) {
                   #  # ]
     985   [ #  #  #  # ]:       2040 :                 rdma_destroy_id(rqpair->cm_id);
     986                 :          0 :         }
     987                 :            : 
     988                 :       2040 :         free(rqpair);
     989                 :       2040 : }
     990                 :            : 
     991                 :            : static int
     992                 :         30 : nvmf_rdma_resize_cq(struct spdk_nvmf_rdma_qpair *rqpair, struct spdk_nvmf_rdma_device *device)
     993                 :            : {
     994                 :          5 :         struct spdk_nvmf_rdma_poller    *rpoller;
     995                 :          5 :         int                             rc, num_cqe, required_num_wr;
     996                 :            : 
     997                 :            :         /* Enlarge CQ size dynamically */
     998   [ +  -  +  - ]:         30 :         rpoller = rqpair->poller;
     999   [ +  -  +  -  :         30 :         required_num_wr = rpoller->required_num_wr + MAX_WR_PER_QP(rqpair->max_queue_depth);
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1000   [ +  -  +  - ]:         30 :         num_cqe = rpoller->num_cqe;
    1001         [ +  + ]:         30 :         if (num_cqe < required_num_wr) {
    1002   [ +  -  +  -  :         24 :                 num_cqe = spdk_max(num_cqe * 2, required_num_wr);
                   +  - ]
    1003   [ +  -  +  -  :         24 :                 num_cqe = spdk_min(num_cqe, device->attr.max_cqe);
          +  -  -  +  +  
             -  +  -  +  
                      - ]
    1004                 :          4 :         }
    1005                 :            : 
    1006   [ +  +  +  -  :         30 :         if (rpoller->num_cqe != num_cqe) {
                   +  + ]
    1007   [ +  +  +  -  :         24 :                 if (device->context->device->transport_type == IBV_TRANSPORT_IWARP) {
          +  -  +  -  +  
             -  +  -  +  
                      + ]
    1008   [ +  -  +  - ]:          6 :                         SPDK_ERRLOG("iWARP doesn't support CQ resize. Current capacity %u, required %u\n"
    1009                 :            :                                     "Using CQ of insufficient size may lead to CQ overrun\n", rpoller->num_cqe, num_cqe);
    1010                 :          6 :                         return -1;
    1011                 :            :                 }
    1012   [ +  +  +  -  :         18 :                 if (required_num_wr > device->attr.max_cqe) {
             +  -  +  + ]
    1013   [ +  -  +  -  :          6 :                         SPDK_ERRLOG("RDMA CQE requirement (%d) exceeds device max_cqe limitation (%d)\n",
                   +  - ]
    1014                 :            :                                     required_num_wr, device->attr.max_cqe);
    1015                 :          6 :                         return -1;
    1016                 :            :                 }
    1017                 :            : 
    1018   [ +  +  +  +  :         12 :                 SPDK_DEBUGLOG(rdma, "Resize RDMA CQ from %d to %d\n", rpoller->num_cqe, num_cqe);
          +  -  #  #  #  
                      # ]
    1019   [ +  -  +  - ]:         12 :                 rc = ibv_resize_cq(rpoller->cq, num_cqe);
    1020         [ +  + ]:         12 :                 if (rc) {
    1021   [ +  -  +  - ]:          6 :                         SPDK_ERRLOG("RDMA CQ resize failed: errno %d: %s\n", errno, spdk_strerror(errno));
    1022                 :          6 :                         return -1;
    1023                 :            :                 }
    1024                 :            : 
    1025   [ +  -  +  - ]:          6 :                 rpoller->num_cqe = num_cqe;
    1026                 :          1 :         }
    1027                 :            : 
    1028   [ +  -  +  - ]:         12 :         rpoller->required_num_wr = required_num_wr;
    1029                 :         12 :         return 0;
    1030                 :          5 : }
    1031                 :            : 
    1032                 :            : static int
    1033                 :       2040 : nvmf_rdma_qpair_initialize(struct spdk_nvmf_qpair *qpair)
    1034                 :            : {
    1035                 :          0 :         struct spdk_nvmf_rdma_qpair             *rqpair;
    1036                 :          0 :         struct spdk_nvmf_rdma_transport         *rtransport;
    1037                 :          0 :         struct spdk_nvmf_transport              *transport;
    1038                 :          0 :         struct spdk_nvmf_rdma_resource_opts     opts;
    1039                 :          0 :         struct spdk_nvmf_rdma_device            *device;
    1040                 :       2040 :         struct spdk_rdma_qp_init_attr           qp_init_attr = {};
    1041                 :            : 
    1042                 :       2040 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    1043   [ #  #  #  # ]:       2040 :         device = rqpair->device;
    1044                 :            : 
    1045                 :       2040 :         qp_init_attr.qp_context = rqpair;
    1046   [ #  #  #  #  :       2040 :         qp_init_attr.pd         = device->pd;
                   #  # ]
    1047   [ #  #  #  #  :       2040 :         qp_init_attr.send_cq    = rqpair->poller->cq;
          #  #  #  #  #  
                      # ]
    1048   [ #  #  #  #  :       2040 :         qp_init_attr.recv_cq    = rqpair->poller->cq;
          #  #  #  #  #  
                      # ]
    1049                 :            : 
    1050   [ +  -  #  #  :       2040 :         if (rqpair->srq) {
                   #  # ]
    1051   [ #  #  #  #  :       2040 :                 qp_init_attr.srq                = rqpair->srq->srq;
          #  #  #  #  #  
                      # ]
    1052                 :          0 :         } else {
    1053   [ #  #  #  #  :          0 :                 qp_init_attr.cap.max_recv_wr    = rqpair->max_queue_depth;
             #  #  #  # ]
    1054                 :            :         }
    1055                 :            : 
    1056                 :            :         /* SEND, READ, and WRITE operations */
    1057   [ #  #  #  #  :       2040 :         qp_init_attr.cap.max_send_wr    = (uint32_t)rqpair->max_queue_depth * 2;
             #  #  #  # ]
    1058   [ #  #  #  #  :       2040 :         qp_init_attr.cap.max_send_sge   = spdk_min((uint32_t)device->attr.max_sge, NVMF_DEFAULT_TX_SGE);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    1059   [ #  #  #  #  :       2040 :         qp_init_attr.cap.max_recv_sge   = spdk_min((uint32_t)device->attr.max_sge, NVMF_DEFAULT_RX_SGE);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    1060   [ #  #  #  #  :       2040 :         qp_init_attr.stats              = &rqpair->poller->stat.qp_stats;
          #  #  #  #  #  
                      # ]
    1061                 :            : 
    1062   [ -  +  -  -  :       2040 :         if (rqpair->srq == NULL && nvmf_rdma_resize_cq(rqpair, device) < 0) {
             #  #  #  # ]
    1063                 :          0 :                 SPDK_ERRLOG("Failed to resize the completion queue. Cannot initialize qpair.\n");
    1064                 :          0 :                 goto error;
    1065                 :            :         }
    1066                 :            : 
    1067   [ #  #  #  #  :       2040 :         rqpair->rdma_qp = spdk_rdma_qp_create(rqpair->cm_id, &qp_init_attr);
             #  #  #  # ]
    1068   [ -  +  #  #  :       2040 :         if (!rqpair->rdma_qp) {
                   #  # ]
    1069                 :          0 :                 goto error;
    1070                 :            :         }
    1071                 :            : 
    1072   [ #  #  #  #  :       2040 :         rqpair->qp_num = rqpair->rdma_qp->qp->qp_num;
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1073                 :            : 
    1074   [ #  #  #  #  :       2040 :         rqpair->max_send_depth = spdk_min((uint32_t)(rqpair->max_queue_depth * 2),
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1075                 :            :                                           qp_init_attr.cap.max_send_wr);
    1076   [ #  #  #  #  :       2040 :         rqpair->max_send_sge = spdk_min(NVMF_DEFAULT_TX_SGE, qp_init_attr.cap.max_send_sge);
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1077   [ #  #  #  #  :       2040 :         rqpair->max_recv_sge = spdk_min(NVMF_DEFAULT_RX_SGE, qp_init_attr.cap.max_recv_sge);
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1078   [ +  +  +  -  :       2040 :         spdk_trace_record(TRACE_RDMA_QP_CREATE, 0, 0, (uintptr_t)rqpair);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    1079   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "New RDMA Connection: %p\n", qpair);
                   #  # ]
    1080                 :            : 
    1081   [ -  +  #  #  :       2040 :         if (rqpair->poller->srq == NULL) {
          #  #  #  #  #  
                      # ]
    1082   [ #  #  #  # ]:          0 :                 rtransport = SPDK_CONTAINEROF(qpair->transport, struct spdk_nvmf_rdma_transport, transport);
    1083         [ #  # ]:          0 :                 transport = &rtransport->transport;
    1084                 :            : 
    1085   [ #  #  #  #  :          0 :                 opts.qp = rqpair->rdma_qp;
                   #  # ]
    1086   [ #  #  #  #  :          0 :                 opts.map = device->map;
                   #  # ]
    1087                 :          0 :                 opts.qpair = rqpair;
    1088         [ #  # ]:          0 :                 opts.shared = false;
    1089   [ #  #  #  #  :          0 :                 opts.max_queue_depth = rqpair->max_queue_depth;
                   #  # ]
    1090   [ #  #  #  #  :          0 :                 opts.in_capsule_data_size = transport->opts.in_capsule_data_size;
             #  #  #  # ]
    1091                 :            : 
    1092   [ #  #  #  # ]:          0 :                 rqpair->resources = nvmf_rdma_resources_create(&opts);
    1093                 :            : 
    1094   [ #  #  #  #  :          0 :                 if (!rqpair->resources) {
                   #  # ]
    1095                 :          0 :                         SPDK_ERRLOG("Unable to allocate resources for receive queue.\n");
    1096   [ #  #  #  # ]:          0 :                         rdma_destroy_qp(rqpair->cm_id);
    1097                 :          0 :                         goto error;
    1098                 :            :                 }
    1099                 :          0 :         } else {
    1100   [ #  #  #  #  :       2040 :                 rqpair->resources = rqpair->poller->resources;
          #  #  #  #  #  
                #  #  # ]
    1101                 :            :         }
    1102                 :            : 
    1103   [ #  #  #  # ]:       2040 :         rqpair->current_recv_depth = 0;
    1104   [ #  #  #  #  :       2040 :         STAILQ_INIT(&rqpair->pending_rdma_read_queue);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1105   [ #  #  #  #  :       2040 :         STAILQ_INIT(&rqpair->pending_rdma_write_queue);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1106   [ #  #  #  #  :       2040 :         STAILQ_INIT(&rqpair->pending_rdma_send_queue);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1107                 :            : 
    1108                 :       2040 :         return 0;
    1109                 :            : 
    1110                 :          0 : error:
    1111   [ #  #  #  # ]:          0 :         rdma_destroy_id(rqpair->cm_id);
    1112   [ #  #  #  # ]:          0 :         rqpair->cm_id = NULL;
    1113                 :          0 :         return -1;
    1114                 :          0 : }
    1115                 :            : 
    1116                 :            : /* Append the given recv wr structure to the resource structs outstanding recvs list. */
    1117                 :            : /* This function accepts either a single wr or the first wr in a linked list. */
    1118                 :            : static void
    1119                 :    6739496 : nvmf_rdma_qpair_queue_recv_wrs(struct spdk_nvmf_rdma_qpair *rqpair, struct ibv_recv_wr *first)
    1120                 :            : {
    1121   [ +  -  +  -  :    6739496 :         struct spdk_nvmf_rdma_transport *rtransport = SPDK_CONTAINEROF(rqpair->qpair.transport,
                   +  - ]
    1122                 :            :                         struct spdk_nvmf_rdma_transport, transport);
    1123                 :            : 
    1124   [ +  +  +  -  :    6739496 :         if (rqpair->srq != NULL) {
                   +  - ]
    1125   [ #  #  #  # ]:    6739460 :                 spdk_rdma_srq_queue_recv_wrs(rqpair->srq, first);
    1126                 :          0 :         } else {
    1127   [ +  -  +  -  :         36 :                 if (spdk_rdma_qp_queue_recv_wrs(rqpair->rdma_qp, first)) {
                   -  + ]
    1128   [ +  -  +  -  :         36 :                         STAILQ_INSERT_TAIL(&rqpair->poller->qpairs_pending_recv, rqpair, recv_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                -  +  - ]
    1129                 :          6 :                 }
    1130                 :            :         }
    1131                 :            : 
    1132   [ +  +  +  +  :    6739496 :         if (rtransport->rdma_opts.no_wr_batching) {
          +  -  +  -  +  
                      - ]
    1133   [ #  #  #  # ]:          0 :                 _poller_submit_recvs(rtransport, rqpair->poller);
    1134                 :          0 :         }
    1135                 :    6739496 : }
    1136                 :            : 
    1137                 :            : static int
    1138                 :     664048 : request_transfer_in(struct spdk_nvmf_request *req)
    1139                 :            : {
    1140                 :          4 :         struct spdk_nvmf_rdma_request   *rdma_req;
    1141                 :          4 :         struct spdk_nvmf_qpair          *qpair;
    1142                 :          4 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    1143                 :          4 :         struct spdk_nvmf_rdma_transport *rtransport;
    1144                 :            : 
    1145   [ +  -  +  - ]:     664048 :         qpair = req->qpair;
    1146                 :     664048 :         rdma_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_rdma_request, req);
    1147                 :     664048 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    1148   [ +  -  +  -  :     664048 :         rtransport = SPDK_CONTAINEROF(rqpair->qpair.transport,
                   +  - ]
    1149                 :            :                                       struct spdk_nvmf_rdma_transport, transport);
    1150                 :            : 
    1151   [ +  +  +  -  :     664048 :         assert(req->xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER);
             +  -  #  # ]
    1152   [ +  +  #  # ]:     664048 :         assert(rdma_req != NULL);
    1153                 :            : 
    1154   [ +  +  +  -  :     664048 :         if (spdk_rdma_qp_queue_send_wrs(rqpair->rdma_qp, rdma_req->transfer_wr)) {
          +  -  +  -  -  
                      + ]
    1155   [ +  -  +  -  :      69025 :                 STAILQ_INSERT_TAIL(&rqpair->poller->qpairs_pending_send, rqpair, send_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                -  +  - ]
    1156                 :          4 :         }
    1157   [ +  +  +  +  :     664048 :         if (rtransport->rdma_opts.no_wr_batching) {
          +  -  +  -  +  
                      - ]
    1158   [ #  #  #  # ]:          0 :                 _poller_submit_sends(rtransport, rqpair->poller);
    1159                 :          0 :         }
    1160                 :            : 
    1161   [ +  +  +  -  :     664048 :         assert(rqpair->current_read_depth + rdma_req->num_outstanding_data_wr <= rqpair->max_read_depth);
          +  -  +  -  +  
          -  +  -  +  -  
                   #  # ]
    1162   [ +  -  +  -  :     664048 :         rqpair->current_read_depth += rdma_req->num_outstanding_data_wr;
          +  -  +  -  +  
                      - ]
    1163   [ +  +  +  -  :     664048 :         assert(rqpair->current_send_depth + rdma_req->num_outstanding_data_wr <= rqpair->max_send_depth);
          +  -  +  -  +  
          -  +  -  +  -  
                   #  # ]
    1164   [ +  -  +  -  :     664048 :         rqpair->current_send_depth += rdma_req->num_outstanding_data_wr;
             +  -  +  - ]
    1165                 :     664048 :         return 0;
    1166                 :          4 : }
    1167                 :            : 
    1168                 :            : static inline void
    1169                 :      12152 : nvmf_rdma_request_reset_transfer_in(struct spdk_nvmf_rdma_request *rdma_req,
    1170                 :            :                                     struct spdk_nvmf_rdma_transport *rtransport)
    1171                 :            : {
    1172                 :            :         /* Put completed WRs back to pool and move transfer_wr pointer */
    1173   [ #  #  #  #  :      12152 :         _nvmf_rdma_request_free_data(rdma_req, rdma_req->transfer_wr, rtransport->data_wr_pool);
             #  #  #  # ]
    1174   [ #  #  #  #  :      12152 :         rdma_req->transfer_wr = rdma_req->remaining_tranfer_in_wrs;
             #  #  #  # ]
    1175   [ #  #  #  # ]:      12152 :         rdma_req->remaining_tranfer_in_wrs = NULL;
    1176   [ #  #  #  #  :      12152 :         rdma_req->num_outstanding_data_wr = rdma_req->num_remaining_data_wr;
             #  #  #  # ]
    1177   [ #  #  #  # ]:      12152 :         rdma_req->num_remaining_data_wr = 0;
    1178                 :      12152 : }
    1179                 :            : 
    1180                 :            : static inline int
    1181                 :      12152 : request_prepare_transfer_in_part(struct spdk_nvmf_request *req, uint32_t num_reads_available)
    1182                 :            : {
    1183                 :          0 :         struct spdk_nvmf_rdma_request   *rdma_req;
    1184                 :          0 :         struct ibv_send_wr              *wr;
    1185                 :          0 :         uint32_t i;
    1186                 :            : 
    1187                 :      12152 :         rdma_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_rdma_request, req);
    1188                 :            : 
    1189   [ -  +  #  #  :      12152 :         assert(req->xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER);
             #  #  #  # ]
    1190   [ -  +  #  # ]:      12152 :         assert(rdma_req != NULL);
    1191   [ -  +  #  # ]:      12152 :         assert(num_reads_available > 0);
    1192   [ -  +  #  #  :      12152 :         assert(rdma_req->num_outstanding_data_wr > num_reads_available);
             #  #  #  # ]
    1193   [ #  #  #  # ]:      12152 :         wr = rdma_req->transfer_wr;
    1194                 :            : 
    1195         [ +  + ]:      35619 :         for (i = 0; i < num_reads_available - 1; i++) {
    1196   [ #  #  #  # ]:      23467 :                 wr = wr->next;
    1197                 :          0 :         }
    1198                 :            : 
    1199   [ #  #  #  #  :      12152 :         rdma_req->remaining_tranfer_in_wrs = wr->next;
             #  #  #  # ]
    1200   [ #  #  #  #  :      12152 :         rdma_req->num_remaining_data_wr = rdma_req->num_outstanding_data_wr - num_reads_available;
             #  #  #  # ]
    1201   [ #  #  #  # ]:      12152 :         rdma_req->num_outstanding_data_wr = num_reads_available;
    1202                 :            :         /* Break chain of WRs to send only part. Once this portion completes, we continue sending RDMA_READs */
    1203   [ #  #  #  # ]:      12152 :         wr->next = NULL;
    1204                 :            : 
    1205                 :      12152 :         return 0;
    1206                 :          0 : }
    1207                 :            : 
    1208                 :            : static int
    1209                 :    6739496 : request_transfer_out(struct spdk_nvmf_request *req, int *data_posted)
    1210                 :            : {
    1211                 :    6739496 :         int                             num_outstanding_data_wr = 0;
    1212                 :          6 :         struct spdk_nvmf_rdma_request   *rdma_req;
    1213                 :          6 :         struct spdk_nvmf_qpair          *qpair;
    1214                 :          6 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    1215                 :          6 :         struct spdk_nvme_cpl            *rsp;
    1216                 :    6739496 :         struct ibv_send_wr              *first = NULL;
    1217                 :          6 :         struct spdk_nvmf_rdma_transport *rtransport;
    1218                 :            : 
    1219         [ +  - ]:    6739496 :         *data_posted = 0;
    1220   [ +  -  +  - ]:    6739496 :         qpair = req->qpair;
    1221   [ +  -  +  -  :    6739496 :         rsp = &req->rsp->nvme_cpl;
                   +  - ]
    1222                 :    6739496 :         rdma_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_rdma_request, req);
    1223                 :    6739496 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    1224   [ +  -  +  -  :    6739496 :         rtransport = SPDK_CONTAINEROF(rqpair->qpair.transport,
                   +  - ]
    1225                 :            :                                       struct spdk_nvmf_rdma_transport, transport);
    1226                 :            : 
    1227                 :            :         /* Advance our sq_head pointer */
    1228   [ +  +  +  -  :    6739496 :         if (qpair->sq_head == qpair->sq_head_max) {
          +  -  +  -  +  
                      - ]
    1229   [ +  -  +  - ]:      55835 :                 qpair->sq_head = 0;
    1230                 :          6 :         } else {
    1231         [ #  # ]:    6683661 :                 qpair->sq_head++;
    1232                 :            :         }
    1233   [ +  -  +  -  :    6739496 :         rsp->sqhd = qpair->sq_head;
             +  -  +  - ]
    1234                 :            : 
    1235                 :            :         /* queue the capsule for the recv buffer */
    1236   [ +  +  +  -  :    6739496 :         assert(rdma_req->recv != NULL);
             +  -  #  # ]
    1237                 :            : 
    1238   [ +  -  +  -  :    6739496 :         nvmf_rdma_qpair_queue_recv_wrs(rqpair, &rdma_req->recv->wr);
                   +  - ]
    1239                 :            : 
    1240   [ +  -  +  - ]:    6739496 :         rdma_req->recv = NULL;
    1241   [ +  +  +  -  :    6739496 :         assert(rqpair->current_recv_depth > 0);
             +  -  #  # ]
    1242         [ +  - ]:    6739496 :         rqpair->current_recv_depth--;
    1243                 :            : 
    1244                 :            :         /* Build the response which consists of optional
    1245                 :            :          * RDMA WRITEs to transfer data, plus an RDMA SEND
    1246                 :            :          * containing the response.
    1247                 :            :          */
    1248   [ +  -  +  - ]:    6739496 :         first = &rdma_req->rsp.wr;
    1249                 :            : 
    1250   [ +  +  +  -  :    6739496 :         if (rsp->status.sc != SPDK_NVME_SC_SUCCESS) {
             +  -  +  + ]
    1251                 :            :                 /* On failure, data was not read from the controller. So clear the
    1252                 :            :                  * number of outstanding data WRs to zero.
    1253                 :            :                  */
    1254   [ +  -  +  - ]:    1407513 :                 rdma_req->num_outstanding_data_wr = 0;
    1255   [ +  +  +  -  :    5331984 :         } else if (req->xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST) {
                   +  + ]
    1256   [ +  -  +  - ]:    3322477 :                 first = rdma_req->transfer_wr;
    1257         [ +  - ]:    3322477 :                 *data_posted = 1;
    1258   [ +  -  +  - ]:    3322477 :                 num_outstanding_data_wr = rdma_req->num_outstanding_data_wr;
    1259                 :          1 :         }
    1260   [ +  +  +  -  :    6739496 :         if (spdk_rdma_qp_queue_send_wrs(rqpair->rdma_qp, first)) {
                   -  + ]
    1261   [ +  -  +  -  :    1003709 :                 STAILQ_INSERT_TAIL(&rqpair->poller->qpairs_pending_send, rqpair, send_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                -  +  - ]
    1262                 :          6 :         }
    1263   [ +  +  +  +  :    6739496 :         if (rtransport->rdma_opts.no_wr_batching) {
          +  -  +  -  +  
                      - ]
    1264   [ #  #  #  # ]:          0 :                 _poller_submit_sends(rtransport, rqpair->poller);
    1265                 :          0 :         }
    1266                 :            : 
    1267                 :            :         /* +1 for the rsp wr */
    1268   [ +  +  +  -  :    6739496 :         assert(rqpair->current_send_depth + num_outstanding_data_wr + 1 <= rqpair->max_send_depth);
          +  -  +  -  +  
                -  #  # ]
    1269   [ +  -  +  -  :    6739496 :         rqpair->current_send_depth += num_outstanding_data_wr + 1;
                   +  - ]
    1270                 :            : 
    1271                 :    6739496 :         return 0;
    1272                 :          6 : }
    1273                 :            : 
    1274                 :            : static int
    1275                 :       2040 : nvmf_rdma_event_accept(struct rdma_cm_id *id, struct spdk_nvmf_rdma_qpair *rqpair)
    1276                 :            : {
    1277                 :          0 :         struct spdk_nvmf_rdma_accept_private_data       accept_data;
    1278                 :       2040 :         struct rdma_conn_param                          ctrlr_event_data = {};
    1279                 :          0 :         int                                             rc;
    1280                 :            : 
    1281                 :       2040 :         accept_data.recfmt = 0;
    1282   [ #  #  #  # ]:       2040 :         accept_data.crqsize = rqpair->max_queue_depth;
    1283                 :            : 
    1284                 :       2040 :         ctrlr_event_data.private_data = &accept_data;
    1285         [ #  # ]:       2040 :         ctrlr_event_data.private_data_len = sizeof(accept_data);
    1286   [ +  -  #  #  :       2040 :         if (id->ps == RDMA_PS_TCP) {
                   #  # ]
    1287                 :       2040 :                 ctrlr_event_data.responder_resources = 0; /* We accept 0 reads from the host */
    1288   [ #  #  #  #  :       2040 :                 ctrlr_event_data.initiator_depth = rqpair->max_read_depth;
                   #  # ]
    1289                 :          0 :         }
    1290                 :            : 
    1291                 :            :         /* Configure infinite retries for the initiator side qpair.
    1292                 :            :          * We need to pass this value to the initiator to prevent the
    1293                 :            :          * initiator side NIC from completing SEND requests back to the
    1294                 :            :          * initiator with status rnr_retry_count_exceeded. */
    1295                 :       2040 :         ctrlr_event_data.rnr_retry_count = 0x7;
    1296                 :            : 
    1297                 :            :         /* When qpair is created without use of rdma cm API, an additional
    1298                 :            :          * information must be provided to initiator in the connection response:
    1299                 :            :          * whether qpair is using SRQ and its qp_num
    1300                 :            :          * Fields below are ignored by rdma cm if qpair has been
    1301                 :            :          * created using rdma cm API. */
    1302   [ #  #  #  #  :       2040 :         ctrlr_event_data.srq = rqpair->srq ? 1 : 0;
                   #  # ]
    1303   [ #  #  #  #  :       2040 :         ctrlr_event_data.qp_num = rqpair->qp_num;
                   #  # ]
    1304                 :            : 
    1305   [ #  #  #  # ]:       2040 :         rc = spdk_rdma_qp_accept(rqpair->rdma_qp, &ctrlr_event_data);
    1306         [ -  + ]:       2040 :         if (rc) {
    1307         [ #  # ]:          0 :                 SPDK_ERRLOG("Error %d on spdk_rdma_qp_accept\n", errno);
    1308                 :          0 :         } else {
    1309   [ -  +  -  +  :       2040 :                 SPDK_DEBUGLOG(rdma, "Sent back the accept\n");
                   #  # ]
    1310                 :            :         }
    1311                 :            : 
    1312                 :       2040 :         return rc;
    1313                 :          0 : }
    1314                 :            : 
    1315                 :            : static void
    1316                 :          0 : nvmf_rdma_event_reject(struct rdma_cm_id *id, enum spdk_nvmf_rdma_transport_error error)
    1317                 :            : {
    1318                 :          0 :         struct spdk_nvmf_rdma_reject_private_data       rej_data;
    1319                 :            : 
    1320                 :          0 :         rej_data.recfmt = 0;
    1321                 :          0 :         rej_data.sts = error;
    1322                 :            : 
    1323                 :          0 :         rdma_reject(id, &rej_data, sizeof(rej_data));
    1324                 :          0 : }
    1325                 :            : 
    1326                 :            : static int
    1327                 :       2040 : nvmf_rdma_connect(struct spdk_nvmf_transport *transport, struct rdma_cm_event *event)
    1328                 :            : {
    1329                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    1330                 :       2040 :         struct spdk_nvmf_rdma_qpair     *rqpair = NULL;
    1331                 :          0 :         struct spdk_nvmf_rdma_port      *port;
    1332                 :       2040 :         struct rdma_conn_param          *rdma_param = NULL;
    1333                 :       2040 :         const struct spdk_nvmf_rdma_request_private_data *private_data = NULL;
    1334                 :          0 :         uint16_t                        max_queue_depth;
    1335                 :          0 :         uint16_t                        max_read_depth;
    1336                 :            : 
    1337                 :       2040 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    1338                 :            : 
    1339   [ -  +  #  #  :       2040 :         assert(event->id != NULL); /* Impossible. Can't even reject the connection. */
             #  #  #  # ]
    1340   [ -  +  #  #  :       2040 :         assert(event->id->verbs != NULL); /* Impossible. No way to handle this. */
          #  #  #  #  #  
                #  #  # ]
    1341                 :            : 
    1342   [ #  #  #  # ]:       2040 :         rdma_param = &event->param.conn;
    1343   [ +  -  #  #  :       2040 :         if (rdma_param->private_data == NULL ||
             #  #  #  # ]
    1344   [ -  +  #  # ]:       2040 :             rdma_param->private_data_len < sizeof(struct spdk_nvmf_rdma_request_private_data)) {
    1345                 :          0 :                 SPDK_ERRLOG("connect request: no private data provided\n");
    1346   [ #  #  #  # ]:          0 :                 nvmf_rdma_event_reject(event->id, SPDK_NVMF_RDMA_ERROR_INVALID_PRIVATE_DATA_LENGTH);
    1347                 :          0 :                 return -1;
    1348                 :            :         }
    1349                 :            : 
    1350   [ #  #  #  # ]:       2040 :         private_data = rdma_param->private_data;
    1351   [ -  +  #  #  :       2040 :         if (private_data->recfmt != 0) {
                   #  # ]
    1352                 :          0 :                 SPDK_ERRLOG("Received RDMA private data with RECFMT != 0\n");
    1353   [ #  #  #  # ]:          0 :                 nvmf_rdma_event_reject(event->id, SPDK_NVMF_RDMA_ERROR_INVALID_RECFMT);
    1354                 :          0 :                 return -1;
    1355                 :            :         }
    1356                 :            : 
    1357   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "Connect Recv on fabric intf name %s, dev_name %s\n",
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1358                 :            :                       event->id->verbs->device->name, event->id->verbs->device->dev_name);
    1359                 :            : 
    1360   [ #  #  #  #  :       2040 :         port = event->listen_id->context;
             #  #  #  # ]
    1361   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "Listen Id was %p with verbs %p. ListenAddr: %p\n",
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    1362                 :            :                       event->listen_id, event->listen_id->verbs, port);
    1363                 :            : 
    1364                 :            :         /* Figure out the supported queue depth. This is a multi-step process
    1365                 :            :          * that takes into account hardware maximums, host provided values,
    1366                 :            :          * and our target's internal memory limits */
    1367                 :            : 
    1368   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "Calculating Queue Depth\n");
                   #  # ]
    1369                 :            : 
    1370                 :            :         /* Start with the maximum queue depth allowed by the target */
    1371   [ #  #  #  #  :       2040 :         max_queue_depth = rtransport->transport.opts.max_queue_depth;
             #  #  #  # ]
    1372   [ #  #  #  #  :       2040 :         max_read_depth = rtransport->transport.opts.max_queue_depth;
             #  #  #  # ]
    1373   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "Target Max Queue Depth: %d\n",
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1374                 :            :                       rtransport->transport.opts.max_queue_depth);
    1375                 :            : 
    1376                 :            :         /* Next check the local NIC's hardware limitations */
    1377   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1378                 :            :                       "Local NIC Max Send/Recv Queue Depth: %d Max Read/Write Queue Depth: %d\n",
    1379                 :            :                       port->device->attr.max_qp_wr, port->device->attr.max_qp_rd_atom);
    1380   [ #  #  #  #  :       2040 :         max_queue_depth = spdk_min(max_queue_depth, port->device->attr.max_qp_wr);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    1381   [ #  #  #  #  :       2040 :         max_read_depth = spdk_min(max_read_depth, port->device->attr.max_qp_init_rd_atom);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    1382                 :            : 
    1383                 :            :         /* Next check the remote NIC's hardware limitations */
    1384   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma,
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1385                 :            :                       "Host (Initiator) NIC Max Incoming RDMA R/W operations: %d Max Outgoing RDMA R/W operations: %d\n",
    1386                 :            :                       rdma_param->initiator_depth, rdma_param->responder_resources);
    1387                 :            :         /* from man3 rdma_get_cm_event
    1388                 :            :          * responder_resources - Specifies the number of responder resources that is requested by the recipient.
    1389                 :            :          * The responder_resources field must match the initiator depth specified by the remote node when running
    1390                 :            :          * the rdma_connect and rdma_accept functions. */
    1391   [ -  +  #  #  :       2040 :         if (rdma_param->responder_resources != 0) {
                   #  # ]
    1392   [ #  #  #  #  :          0 :                 if (private_data->qid) {
                   #  # ]
    1393   [ #  #  #  #  :          0 :                         SPDK_DEBUGLOG(rdma, "Host (Initiator) is not allowed to use RDMA operations,"
          #  #  #  #  #  
                      # ]
    1394                 :            :                                       " responder_resources must be 0 but set to %u\n",
    1395                 :            :                                       rdma_param->responder_resources);
    1396                 :          0 :                 } else {
    1397   [ #  #  #  # ]:          0 :                         SPDK_WARNLOG("Host (Initiator) is not allowed to use RDMA operations,"
    1398                 :            :                                      " responder_resources must be 0 but set to %u\n",
    1399                 :            :                                      rdma_param->responder_resources);
    1400                 :            :                 }
    1401                 :          0 :         }
    1402                 :            :         /* from man3 rdma_get_cm_event
    1403                 :            :          * initiator_depth - Specifies the maximum number of outstanding RDMA read operations that the recipient holds.
    1404                 :            :          * The initiator_depth field must match the responder resources specified by the remote node when running
    1405                 :            :          * the rdma_connect and rdma_accept functions. */
    1406   [ -  +  #  #  :       2040 :         if (rdma_param->initiator_depth == 0) {
                   #  # ]
    1407                 :          0 :                 SPDK_ERRLOG("Host (Initiator) doesn't support RDMA_READ or atomic operations\n");
    1408   [ #  #  #  # ]:          0 :                 nvmf_rdma_event_reject(event->id, SPDK_NVMF_RDMA_ERROR_INVALID_IRD);
    1409                 :          0 :                 return -1;
    1410                 :            :         }
    1411   [ #  #  #  #  :       2040 :         max_read_depth = spdk_min(max_read_depth, rdma_param->initiator_depth);
          #  #  #  #  #  
                      # ]
    1412                 :            : 
    1413   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "Host Receive Queue Size: %d\n", private_data->hrqsize);
          #  #  #  #  #  
                      # ]
    1414   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "Host Send Queue Size: %d\n", private_data->hsqsize);
          #  #  #  #  #  
                      # ]
    1415   [ #  #  #  #  :       2040 :         max_queue_depth = spdk_min(max_queue_depth, private_data->hrqsize);
          #  #  #  #  #  
                      # ]
    1416   [ +  +  #  #  :       2040 :         max_queue_depth = spdk_min(max_queue_depth, private_data->hsqsize + 1);
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1417                 :            : 
    1418   [ -  +  -  +  :       2040 :         SPDK_DEBUGLOG(rdma, "Final Negotiated Queue Depth: %d R/W Depth: %d\n",
                   #  # ]
    1419                 :            :                       max_queue_depth, max_read_depth);
    1420                 :            : 
    1421                 :       2040 :         rqpair = calloc(1, sizeof(struct spdk_nvmf_rdma_qpair));
    1422         [ -  + ]:       2040 :         if (rqpair == NULL) {
    1423                 :          0 :                 SPDK_ERRLOG("Could not allocate new connection.\n");
    1424   [ #  #  #  # ]:          0 :                 nvmf_rdma_event_reject(event->id, SPDK_NVMF_RDMA_ERROR_NO_RESOURCES);
    1425                 :          0 :                 return -1;
    1426                 :            :         }
    1427                 :            : 
    1428   [ #  #  #  #  :       2040 :         rqpair->device = port->device;
             #  #  #  # ]
    1429   [ #  #  #  # ]:       2040 :         rqpair->max_queue_depth = max_queue_depth;
    1430   [ #  #  #  # ]:       2040 :         rqpair->max_read_depth = max_read_depth;
    1431   [ #  #  #  #  :       2040 :         rqpair->cm_id = event->id;
             #  #  #  # ]
    1432   [ #  #  #  #  :       2040 :         rqpair->listen_id = event->listen_id;
             #  #  #  # ]
    1433   [ #  #  #  #  :       2040 :         rqpair->qpair.transport = transport;
                   #  # ]
    1434   [ #  #  #  #  :       2040 :         STAILQ_INIT(&rqpair->ibv_events);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1435                 :            :         /* use qid from the private data to determine the qpair type
    1436                 :            :            qid will be set to the appropriate value when the controller is created */
    1437   [ #  #  #  #  :       2040 :         rqpair->qpair.qid = private_data->qid;
          #  #  #  #  #  
                      # ]
    1438                 :            : 
    1439   [ #  #  #  #  :       2040 :         event->id->context = &rqpair->qpair;
          #  #  #  #  #  
                      # ]
    1440                 :            : 
    1441   [ #  #  #  #  :       2040 :         spdk_nvmf_tgt_new_qpair(transport->tgt, &rqpair->qpair);
                   #  # ]
    1442                 :            : 
    1443                 :       2040 :         return 0;
    1444                 :          0 : }
    1445                 :            : 
    1446                 :            : static inline void
    1447                 :    5950179 : nvmf_rdma_setup_wr(struct ibv_send_wr *wr, struct ibv_send_wr *next,
    1448                 :            :                    enum spdk_nvme_data_transfer xfer)
    1449                 :            : {
    1450         [ +  + ]:    5950179 :         if (xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST) {
    1451   [ +  -  +  - ]:    4307436 :                 wr->opcode = IBV_WR_RDMA_WRITE;
    1452   [ +  -  +  - ]:    4307436 :                 wr->send_flags = 0;
    1453   [ +  -  +  - ]:    4307436 :                 wr->next = next;
    1454         [ +  - ]:    1642767 :         } else if (xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER) {
    1455   [ +  -  +  - ]:    1642743 :                 wr->opcode = IBV_WR_RDMA_READ;
    1456   [ +  -  +  - ]:    1642743 :                 wr->send_flags = IBV_SEND_SIGNALED;
    1457   [ +  -  +  - ]:    1642743 :                 wr->next = NULL;
    1458                 :          4 :         } else {
    1459         [ #  # ]:          0 :                 assert(0);
    1460                 :            :         }
    1461                 :    5950179 : }
    1462                 :            : 
    1463                 :            : static int
    1464                 :      77524 : nvmf_request_alloc_wrs(struct spdk_nvmf_rdma_transport *rtransport,
    1465                 :            :                        struct spdk_nvmf_rdma_request *rdma_req,
    1466                 :            :                        uint32_t num_sgl_descriptors)
    1467                 :            : {
    1468                 :         30 :         struct spdk_nvmf_rdma_request_data      *work_requests[SPDK_NVMF_MAX_SGL_ENTRIES];
    1469                 :          6 :         struct spdk_nvmf_rdma_request_data      *current_data_wr;
    1470                 :          6 :         uint32_t                                i;
    1471                 :            : 
    1472         [ -  + ]:      77524 :         if (num_sgl_descriptors > SPDK_NVMF_MAX_SGL_ENTRIES) {
    1473                 :          0 :                 SPDK_ERRLOG("Requested too much entries (%u), the limit is %u\n",
    1474                 :            :                             num_sgl_descriptors, SPDK_NVMF_MAX_SGL_ENTRIES);
    1475                 :          0 :                 return -EINVAL;
    1476                 :            :         }
    1477                 :            : 
    1478   [ +  +  +  -  :      77524 :         if (spdk_mempool_get_bulk(rtransport->data_wr_pool, (void **)work_requests, num_sgl_descriptors)) {
                   +  - ]
    1479                 :          0 :                 return -ENOMEM;
    1480                 :            :         }
    1481                 :            : 
    1482         [ +  - ]:      77524 :         current_data_wr = &rdma_req->data;
    1483                 :            : 
    1484         [ +  + ]:     443004 :         for (i = 0; i < num_sgl_descriptors; i++) {
    1485   [ +  -  +  -  :     365480 :                 nvmf_rdma_setup_wr(&current_data_wr->wr, &work_requests[i]->wr, rdma_req->req.xfer);
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
    1486   [ +  -  +  -  :     365480 :                 current_data_wr->wr.next = &work_requests[i]->wr;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1487   [ +  -  +  -  :     365480 :                 current_data_wr = work_requests[i];
                   +  - ]
    1488   [ +  -  +  -  :     365480 :                 current_data_wr->wr.sg_list = current_data_wr->sgl;
             +  -  +  - ]
    1489   [ +  -  +  -  :     365480 :                 current_data_wr->wr.wr_id = rdma_req->data.wr.wr_id;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1490                 :          6 :         }
    1491                 :            : 
    1492   [ +  -  +  -  :      77524 :         nvmf_rdma_setup_wr(&current_data_wr->wr, &rdma_req->rsp.wr, rdma_req->req.xfer);
          +  -  +  -  +  
                -  +  - ]
    1493                 :            : 
    1494                 :      77524 :         return 0;
    1495                 :          6 : }
    1496                 :            : 
    1497                 :            : static inline void
    1498                 :    5507175 : nvmf_rdma_setup_request(struct spdk_nvmf_rdma_request *rdma_req)
    1499                 :            : {
    1500   [ +  -  +  - ]:    5507175 :         struct ibv_send_wr              *wr = &rdma_req->data.wr;
    1501   [ +  -  +  -  :    5507175 :         struct spdk_nvme_sgl_descriptor *sgl = &rdma_req->req.cmd->nvme_cmd.dptr.sgl1;
          +  -  +  -  +  
                -  +  - ]
    1502                 :            : 
    1503   [ +  -  +  -  :    5507175 :         wr->wr.rdma.rkey = sgl->keyed.key;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1504   [ +  -  +  -  :    5507175 :         wr->wr.rdma.remote_addr = sgl->address;
          +  -  +  -  +  
                -  +  - ]
    1505   [ +  -  +  -  :    5507175 :         nvmf_rdma_setup_wr(wr, &rdma_req->rsp.wr, rdma_req->req.xfer);
          +  -  +  -  +  
                      - ]
    1506                 :    5507175 : }
    1507                 :            : 
    1508                 :            : static inline void
    1509                 :          6 : nvmf_rdma_update_remote_addr(struct spdk_nvmf_rdma_request *rdma_req, uint32_t num_wrs)
    1510                 :            : {
    1511   [ +  -  +  - ]:          6 :         struct ibv_send_wr              *wr = &rdma_req->data.wr;
    1512   [ +  -  +  -  :          6 :         struct spdk_nvme_sgl_descriptor *sgl = &rdma_req->req.cmd->nvme_cmd.dptr.sgl1;
          +  -  +  -  +  
                -  +  - ]
    1513                 :          1 :         uint32_t                        i;
    1514                 :          1 :         int                             j;
    1515                 :          6 :         uint64_t                        remote_addr_offset = 0;
    1516                 :            : 
    1517         [ +  + ]:         18 :         for (i = 0; i < num_wrs; ++i) {
    1518   [ +  -  +  -  :         12 :                 wr->wr.rdma.rkey = sgl->keyed.key;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1519   [ +  -  +  -  :         12 :                 wr->wr.rdma.remote_addr = sgl->address + remote_addr_offset;
          +  -  +  -  +  
                -  +  - ]
    1520   [ +  +  +  -  :        114 :                 for (j = 0; j < wr->num_sge; ++j) {
             +  +  +  - ]
    1521   [ +  -  +  -  :        102 :                         remote_addr_offset += wr->sg_list[j].length;
          +  -  +  -  +  
                      - ]
    1522                 :         17 :                 }
    1523   [ +  -  +  - ]:         12 :                 wr = wr->next;
    1524                 :          2 :         }
    1525                 :          6 : }
    1526                 :            : 
    1527                 :            : static int
    1528                 :    4531370 : nvmf_rdma_fill_wr_sgl(struct spdk_nvmf_rdma_poll_group *rgroup,
    1529                 :            :                       struct spdk_nvmf_rdma_device *device,
    1530                 :            :                       struct spdk_nvmf_rdma_request *rdma_req,
    1531                 :            :                       struct ibv_send_wr *wr,
    1532                 :            :                       uint32_t total_length)
    1533                 :            : {
    1534                 :         75 :         struct spdk_rdma_memory_translation mem_translation;
    1535                 :         15 :         struct ibv_sge  *sg_ele;
    1536                 :         15 :         struct iovec *iov;
    1537                 :         15 :         uint32_t lkey, remaining;
    1538                 :         15 :         int rc;
    1539                 :            : 
    1540   [ +  -  +  - ]:    4531370 :         wr->num_sge = 0;
    1541                 :            : 
    1542   [ +  +  +  -  :   21979935 :         while (total_length && wr->num_sge < SPDK_NVMF_MAX_SGL_ENTRIES) {
             +  -  +  + ]
    1543   [ +  -  +  -  :   17448565 :                 iov = &rdma_req->req.iov[rdma_req->iovpos];
          +  -  +  -  +  
                -  +  - ]
    1544   [ +  -  +  -  :   17448565 :                 rc = spdk_rdma_get_translation(device->map, iov->iov_base, iov->iov_len, &mem_translation);
          +  -  +  -  +  
                -  +  - ]
    1545         [ +  + ]:   17448565 :                 if (spdk_unlikely(rc)) {
    1546                 :          0 :                         return rc;
    1547                 :            :                 }
    1548                 :            : 
    1549                 :   17448565 :                 lkey = spdk_rdma_memory_translation_get_lkey(&mem_translation);
    1550   [ +  -  +  -  :   17448565 :                 sg_ele = &wr->sg_list[wr->num_sge];
          +  -  +  -  +  
                      - ]
    1551   [ +  -  +  -  :   17448565 :                 remaining = spdk_min((uint32_t)iov->iov_len - rdma_req->offset, total_length);
          +  -  +  -  +  
          +  +  -  +  -  
             +  -  +  - ]
    1552                 :            : 
    1553   [ +  -  +  - ]:   17448565 :                 sg_ele->lkey = lkey;
    1554   [ +  -  +  -  :   17448565 :                 sg_ele->addr = (uintptr_t)iov->iov_base + rdma_req->offset;
          +  -  +  -  +  
                -  +  - ]
    1555   [ +  -  +  - ]:   17448565 :                 sg_ele->length = remaining;
    1556   [ +  +  +  +  :   17448565 :                 SPDK_DEBUGLOG(rdma, "sge[%d] %p addr 0x%"PRIx64", len %u\n", wr->num_sge, sg_ele, sg_ele->addr,
          +  -  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    1557                 :            :                               sg_ele->length);
    1558   [ +  -  +  -  :   17448565 :                 rdma_req->offset += sg_ele->length;
             +  -  +  - ]
    1559   [ +  -  +  - ]:   17448565 :                 total_length -= sg_ele->length;
    1560   [ +  -  +  - ]:   17448565 :                 wr->num_sge++;
    1561                 :            : 
    1562   [ +  +  +  -  :   17448565 :                 if (rdma_req->offset == iov->iov_len) {
          +  -  +  -  +  
                      + ]
    1563   [ +  -  +  - ]:   17359997 :                         rdma_req->offset = 0;
    1564         [ +  - ]:   17359997 :                         rdma_req->iovpos++;
    1565                 :         57 :                 }
    1566                 :            :         }
    1567                 :            : 
    1568         [ -  + ]:    4531370 :         if (total_length) {
    1569                 :          0 :                 SPDK_ERRLOG("Not enough SG entries to hold data buffer\n");
    1570                 :          0 :                 return -EINVAL;
    1571                 :            :         }
    1572                 :            : 
    1573                 :    4531370 :         return 0;
    1574                 :         15 : }
    1575                 :            : 
    1576                 :            : static int
    1577                 :         60 : nvmf_rdma_fill_wr_sgl_with_dif(struct spdk_nvmf_rdma_poll_group *rgroup,
    1578                 :            :                                struct spdk_nvmf_rdma_device *device,
    1579                 :            :                                struct spdk_nvmf_rdma_request *rdma_req,
    1580                 :            :                                struct ibv_send_wr *wr,
    1581                 :            :                                uint32_t total_length,
    1582                 :            :                                uint32_t num_extra_wrs)
    1583                 :            : {
    1584                 :         50 :         struct spdk_rdma_memory_translation mem_translation;
    1585   [ +  -  +  -  :         60 :         struct spdk_dif_ctx *dif_ctx = &rdma_req->req.dif.dif_ctx;
                   +  - ]
    1586                 :         10 :         struct ibv_sge *sg_ele;
    1587                 :         10 :         struct iovec *iov;
    1588                 :         10 :         struct iovec *rdma_iov;
    1589                 :         10 :         uint32_t lkey, remaining;
    1590                 :         10 :         uint32_t remaining_data_block, data_block_size, md_size;
    1591                 :         10 :         uint32_t sge_len;
    1592                 :         10 :         int rc;
    1593                 :            : 
    1594   [ +  -  +  -  :         60 :         data_block_size = dif_ctx->block_size - dif_ctx->md_size;
             +  -  +  - ]
    1595                 :            : 
    1596   [ +  +  +  -  :         60 :         if (spdk_likely(!rdma_req->req.stripped_data)) {
             +  -  +  + ]
    1597   [ +  -  +  - ]:         30 :                 rdma_iov = rdma_req->req.iov;
    1598                 :         30 :                 remaining_data_block = data_block_size;
    1599   [ +  -  +  - ]:         30 :                 md_size = dif_ctx->md_size;
    1600                 :          5 :         } else {
    1601   [ +  -  +  -  :         30 :                 rdma_iov = rdma_req->req.stripped_data->iov;
             +  -  +  - ]
    1602   [ +  +  +  -  :         30 :                 total_length = total_length / dif_ctx->block_size * data_block_size;
                   +  - ]
    1603                 :         30 :                 remaining_data_block = total_length;
    1604                 :         30 :                 md_size = 0;
    1605                 :            :         }
    1606                 :            : 
    1607   [ +  -  +  - ]:         60 :         wr->num_sge = 0;
    1608                 :            : 
    1609   [ +  +  +  +  :        165 :         while (total_length && (num_extra_wrs || wr->num_sge < SPDK_NVMF_MAX_SGL_ENTRIES)) {
          +  -  +  -  +  
                      + ]
    1610   [ +  -  +  -  :         90 :                 iov = rdma_iov + rdma_req->iovpos;
                   +  - ]
    1611   [ +  -  +  -  :         90 :                 rc = spdk_rdma_get_translation(device->map, iov->iov_base, iov->iov_len, &mem_translation);
          +  -  +  -  +  
                -  +  - ]
    1612         [ +  + ]:         90 :                 if (spdk_unlikely(rc)) {
    1613                 :          0 :                         return rc;
    1614                 :            :                 }
    1615                 :            : 
    1616                 :         90 :                 lkey = spdk_rdma_memory_translation_get_lkey(&mem_translation);
    1617   [ +  -  +  -  :         90 :                 sg_ele = &wr->sg_list[wr->num_sge];
          +  -  +  -  +  
                      - ]
    1618   [ +  -  +  -  :         90 :                 remaining = spdk_min((uint32_t)iov->iov_len - rdma_req->offset, total_length);
          +  -  +  -  +  
          +  +  -  +  -  
             +  -  +  - ]
    1619                 :            : 
    1620         [ +  + ]:        318 :                 while (remaining) {
    1621   [ +  +  +  -  :        228 :                         if (wr->num_sge >= SPDK_NVMF_MAX_SGL_ENTRIES) {
                   +  + ]
    1622   [ +  -  +  -  :          6 :                                 if (num_extra_wrs > 0 && wr->next) {
             +  -  +  - ]
    1623   [ +  -  +  - ]:          6 :                                         wr = wr->next;
    1624   [ +  -  +  - ]:          6 :                                         wr->num_sge = 0;
    1625   [ +  -  +  -  :          6 :                                         sg_ele = &wr->sg_list[wr->num_sge];
          +  -  +  -  +  
                      - ]
    1626                 :          6 :                                         num_extra_wrs--;
    1627                 :          1 :                                 } else {
    1628                 :          0 :                                         break;
    1629                 :            :                                 }
    1630                 :          1 :                         }
    1631   [ +  -  +  - ]:        228 :                         sg_ele->lkey = lkey;
    1632   [ +  -  +  -  :        228 :                         sg_ele->addr = (uintptr_t)((char *)iov->iov_base + rdma_req->offset);
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1633         [ +  + ]:        228 :                         sge_len = spdk_min(remaining, remaining_data_block);
    1634   [ +  -  +  - ]:        228 :                         sg_ele->length = sge_len;
    1635   [ +  +  +  +  :        228 :                         SPDK_DEBUGLOG(rdma, "sge[%d] %p addr 0x%"PRIx64", len %u\n", wr->num_sge, sg_ele,
          +  -  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    1636                 :            :                                       sg_ele->addr, sg_ele->length);
    1637                 :        228 :                         remaining -= sge_len;
    1638                 :        228 :                         remaining_data_block -= sge_len;
    1639   [ +  -  +  - ]:        228 :                         rdma_req->offset += sge_len;
    1640                 :        228 :                         total_length -= sge_len;
    1641                 :            : 
    1642         [ +  - ]:        228 :                         sg_ele++;
    1643   [ +  -  +  - ]:        228 :                         wr->num_sge++;
    1644                 :            : 
    1645         [ +  + ]:        228 :                         if (remaining_data_block == 0) {
    1646                 :            :                                 /* skip metadata */
    1647   [ +  -  +  - ]:        204 :                                 rdma_req->offset += md_size;
    1648                 :        204 :                                 total_length -= md_size;
    1649                 :            :                                 /* Metadata that do not fit this IO buffer will be included in the next IO buffer */
    1650         [ +  + ]:        204 :                                 remaining -= spdk_min(remaining, md_size);
    1651                 :        204 :                                 remaining_data_block = data_block_size;
    1652                 :         34 :                         }
    1653                 :            : 
    1654         [ +  + ]:        228 :                         if (remaining == 0) {
    1655                 :            :                                 /* By subtracting the size of the last IOV from the offset, we ensure that we skip
    1656                 :            :                                    the remaining metadata bits at the beginning of the next buffer */
    1657   [ +  -  +  -  :         90 :                                 rdma_req->offset -= spdk_min(iov->iov_len, rdma_req->offset);
          +  -  +  -  +  
          +  +  -  +  -  
          +  -  +  -  +  
                -  +  - ]
    1658         [ +  - ]:         90 :                                 rdma_req->iovpos++;
    1659                 :         15 :                         }
    1660                 :            :                 }
    1661                 :            :         }
    1662                 :            : 
    1663         [ -  + ]:         60 :         if (total_length) {
    1664                 :          0 :                 SPDK_ERRLOG("Not enough SG entries to hold data buffer\n");
    1665                 :          0 :                 return -EINVAL;
    1666                 :            :         }
    1667                 :            : 
    1668                 :         60 :         return 0;
    1669                 :         10 : }
    1670                 :            : 
    1671                 :            : static inline uint32_t
    1672                 :         48 : nvmf_rdma_calc_num_wrs(uint32_t length, uint32_t io_unit_size, uint32_t block_size)
    1673                 :            : {
    1674                 :            :         /* estimate the number of SG entries and WRs needed to process the request */
    1675                 :         48 :         uint32_t num_sge = 0;
    1676                 :          8 :         uint32_t i;
    1677         [ +  + ]:         48 :         uint32_t num_buffers = SPDK_CEIL_DIV(length, io_unit_size);
    1678                 :            : 
    1679   [ +  +  +  + ]:        138 :         for (i = 0; i < num_buffers && length > 0; i++) {
    1680         [ +  + ]:         90 :                 uint32_t buffer_len = spdk_min(length, io_unit_size);
    1681         [ +  + ]:         90 :                 uint32_t num_sge_in_block = SPDK_CEIL_DIV(buffer_len, block_size);
    1682                 :            : 
    1683         [ +  + ]:         90 :                 if (num_sge_in_block * block_size > buffer_len) {
    1684                 :         66 :                         ++num_sge_in_block;
    1685                 :         11 :                 }
    1686                 :         90 :                 num_sge += num_sge_in_block;
    1687                 :         90 :                 length -= buffer_len;
    1688                 :         15 :         }
    1689         [ +  - ]:         48 :         return SPDK_CEIL_DIV(num_sge, SPDK_NVMF_MAX_SGL_ENTRIES);
    1690                 :          8 : }
    1691                 :            : 
    1692                 :            : static int
    1693                 :    5507175 : nvmf_rdma_request_fill_iovs(struct spdk_nvmf_rdma_transport *rtransport,
    1694                 :            :                             struct spdk_nvmf_rdma_device *device,
    1695                 :            :                             struct spdk_nvmf_rdma_request *rdma_req)
    1696                 :            : {
    1697                 :         16 :         struct spdk_nvmf_rdma_qpair             *rqpair;
    1698                 :         16 :         struct spdk_nvmf_rdma_poll_group        *rgroup;
    1699         [ +  - ]:    5507175 :         struct spdk_nvmf_request                *req = &rdma_req->req;
    1700   [ +  -  +  - ]:    5507175 :         struct ibv_send_wr                      *wr = &rdma_req->data.wr;
    1701                 :         16 :         int                                     rc;
    1702                 :    5507175 :         uint32_t                                num_wrs = 1;
    1703                 :         16 :         uint32_t                                length;
    1704                 :            : 
    1705   [ +  -  +  - ]:    5507175 :         rqpair = SPDK_CONTAINEROF(req->qpair, struct spdk_nvmf_rdma_qpair, qpair);
    1706   [ +  -  +  -  :    5507175 :         rgroup = rqpair->poller->group;
             +  -  +  - ]
    1707                 :            : 
    1708                 :            :         /* rdma wr specifics */
    1709                 :    5507175 :         nvmf_rdma_setup_request(rdma_req);
    1710                 :            : 
    1711   [ +  -  +  - ]:    5507175 :         length = req->length;
    1712   [ +  +  +  -  :    5507175 :         if (spdk_unlikely(req->dif_enabled)) {
             +  -  +  + ]
    1713   [ +  -  +  -  :         48 :                 req->dif.orig_length = length;
                   +  - ]
    1714   [ +  -  +  - ]:         48 :                 length = spdk_dif_get_length_with_md(length, &req->dif.dif_ctx);
    1715   [ +  -  +  -  :         48 :                 req->dif.elba_length = length;
                   +  - ]
    1716                 :          8 :         }
    1717                 :            : 
    1718   [ +  -  +  - ]:    5507175 :         rc = spdk_nvmf_request_get_buffers(req, &rgroup->group, &rtransport->transport,
    1719                 :         16 :                                            length);
    1720         [ +  + ]:    5507175 :         if (rc != 0) {
    1721                 :    1418737 :                 return rc;
    1722                 :            :         }
    1723                 :            : 
    1724   [ +  +  +  -  :    4088438 :         assert(req->iovcnt <= rqpair->max_send_sge);
          +  -  +  -  +  
                -  #  # ]
    1725                 :            : 
    1726                 :            :         /* When dif_insert_or_strip is true and the I/O data length is greater than one block,
    1727                 :            :          * the stripped_buffers are got for DIF stripping. */
    1728   [ +  +  +  -  :    4088438 :         if (spdk_unlikely(req->dif_enabled && (req->xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST)
          +  +  +  +  +  
          -  +  -  -  +  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                      + ]
    1729                 :            :                           && (req->dif.elba_length > req->dif.dif_ctx.block_size))) {
    1730         [ +  - ]:         49 :                 rc = nvmf_request_get_stripped_buffers(req, &rgroup->group,
    1731   [ +  -  +  -  :          7 :                                                        &rtransport->transport, req->dif.orig_length);
             +  -  +  - ]
    1732         [ +  + ]:         42 :                 if (rc != 0) {
    1733   [ +  +  +  +  :         24 :                         SPDK_INFOLOG(rdma, "Get stripped buffers fail %d, fallback to req.iov.\n", rc);
                   +  - ]
    1734                 :          4 :                 }
    1735                 :          7 :         }
    1736                 :            : 
    1737   [ +  -  +  - ]:    4088438 :         rdma_req->iovpos = 0;
    1738                 :            : 
    1739   [ +  +  +  -  :    4088438 :         if (spdk_unlikely(req->dif_enabled)) {
             +  -  +  + ]
    1740   [ +  -  +  -  :         56 :                 num_wrs = nvmf_rdma_calc_num_wrs(length, rtransport->transport.opts.io_unit_size,
             +  -  +  - ]
    1741   [ +  -  +  -  :          8 :                                                  req->dif.dif_ctx.block_size);
             +  -  +  - ]
    1742         [ +  + ]:         48 :                 if (num_wrs > 1) {
    1743                 :          6 :                         rc = nvmf_request_alloc_wrs(rtransport, rdma_req, num_wrs - 1);
    1744         [ -  + ]:          6 :                         if (rc != 0) {
    1745                 :          0 :                                 goto err_exit;
    1746                 :            :                         }
    1747                 :          1 :                 }
    1748                 :            : 
    1749                 :         48 :                 rc = nvmf_rdma_fill_wr_sgl_with_dif(rgroup, device, rdma_req, wr, length, num_wrs - 1);
    1750         [ -  + ]:         48 :                 if (spdk_unlikely(rc != 0)) {
    1751                 :          0 :                         goto err_exit;
    1752                 :            :                 }
    1753                 :            : 
    1754         [ +  + ]:         48 :                 if (num_wrs > 1) {
    1755                 :          6 :                         nvmf_rdma_update_remote_addr(rdma_req, num_wrs);
    1756                 :          1 :                 }
    1757                 :          8 :         } else {
    1758                 :    4088390 :                 rc = nvmf_rdma_fill_wr_sgl(rgroup, device, rdma_req, wr, length);
    1759         [ -  + ]:    4088390 :                 if (spdk_unlikely(rc != 0)) {
    1760                 :          0 :                         goto err_exit;
    1761                 :            :                 }
    1762                 :            :         }
    1763                 :            : 
    1764                 :            :         /* set the number of outstanding data WRs for this request. */
    1765   [ +  -  +  - ]:    4088438 :         rdma_req->num_outstanding_data_wr = num_wrs;
    1766                 :            : 
    1767                 :    4088438 :         return rc;
    1768                 :            : 
    1769                 :          0 : err_exit:
    1770   [ #  #  #  # ]:          0 :         spdk_nvmf_request_free_buffers(req, &rgroup->group, &rtransport->transport);
    1771                 :          0 :         nvmf_rdma_request_free_data(rdma_req, rtransport);
    1772   [ #  #  #  # ]:          0 :         req->iovcnt = 0;
    1773                 :          0 :         return rc;
    1774                 :         16 : }
    1775                 :            : 
    1776                 :            : static int
    1777                 :      77518 : nvmf_rdma_request_fill_iovs_multi_sgl(struct spdk_nvmf_rdma_transport *rtransport,
    1778                 :            :                                       struct spdk_nvmf_rdma_device *device,
    1779                 :            :                                       struct spdk_nvmf_rdma_request *rdma_req)
    1780                 :            : {
    1781                 :          5 :         struct spdk_nvmf_rdma_qpair             *rqpair;
    1782                 :          5 :         struct spdk_nvmf_rdma_poll_group        *rgroup;
    1783                 :          5 :         struct ibv_send_wr                      *current_wr;
    1784         [ +  - ]:      77518 :         struct spdk_nvmf_request                *req = &rdma_req->req;
    1785                 :          5 :         struct spdk_nvme_sgl_descriptor         *inline_segment, *desc;
    1786                 :          5 :         uint32_t                                num_sgl_descriptors;
    1787                 :      77518 :         uint32_t                                lengths[SPDK_NVMF_MAX_SGL_ENTRIES], total_length = 0;
    1788                 :          5 :         uint32_t                                i;
    1789                 :          5 :         int                                     rc;
    1790                 :            : 
    1791   [ +  -  +  -  :      77518 :         rqpair = SPDK_CONTAINEROF(rdma_req->req.qpair, struct spdk_nvmf_rdma_qpair, qpair);
                   +  - ]
    1792   [ +  -  +  -  :      77518 :         rgroup = rqpair->poller->group;
             +  -  +  - ]
    1793                 :            : 
    1794   [ +  -  +  -  :      77518 :         inline_segment = &req->cmd->nvme_cmd.dptr.sgl1;
          +  -  +  -  +  
                      - ]
    1795   [ +  +  +  -  :      77518 :         assert(inline_segment->generic.type == SPDK_NVME_SGL_TYPE_LAST_SEGMENT);
          +  -  +  -  #  
                      # ]
    1796   [ +  +  +  -  :      77518 :         assert(inline_segment->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_OFFSET);
          +  -  +  -  #  
                      # ]
    1797                 :            : 
    1798   [ +  -  +  -  :      77518 :         num_sgl_descriptors = inline_segment->unkeyed.length / sizeof(struct spdk_nvme_sgl_descriptor);
          +  -  +  -  +  
                      - ]
    1799   [ +  +  #  # ]:      77518 :         assert(num_sgl_descriptors <= SPDK_NVMF_MAX_SGL_ENTRIES);
    1800                 :            : 
    1801   [ +  -  +  -  :      77518 :         desc = (struct spdk_nvme_sgl_descriptor *)rdma_req->recv->buf + inline_segment->address;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1802         [ +  + ]:     520510 :         for (i = 0; i < num_sgl_descriptors; i++) {
    1803   [ +  +  +  -  :     442992 :                 if (spdk_likely(!req->dif_enabled)) {
             +  -  +  + ]
    1804   [ +  -  +  -  :     442980 :                         lengths[i] = desc->keyed.length;
          +  -  +  -  +  
                -  +  - ]
    1805                 :          8 :                 } else {
    1806   [ +  -  +  -  :         12 :                         req->dif.orig_length += desc->keyed.length;
          +  -  +  -  +  
                -  +  - ]
    1807   [ +  -  +  -  :         12 :                         lengths[i] = spdk_dif_get_length_with_md(desc->keyed.length, &req->dif.dif_ctx);
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
    1808   [ +  -  +  -  :         12 :                         req->dif.elba_length += lengths[i];
          +  -  +  -  +  
                -  +  - ]
    1809                 :            :                 }
    1810   [ +  -  +  -  :     442992 :                 total_length += lengths[i];
                   +  - ]
    1811         [ +  - ]:     442992 :                 desc++;
    1812                 :         10 :         }
    1813                 :            : 
    1814   [ +  +  +  -  :      77518 :         if (total_length > rtransport->transport.opts.max_io_size) {
          +  -  +  -  -  
                      + ]
    1815   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("Multi SGL length 0x%x exceeds max io size 0x%x\n",
             #  #  #  # ]
    1816                 :            :                             total_length, rtransport->transport.opts.max_io_size);
    1817   [ #  #  #  #  :          0 :                 req->rsp->nvme_cpl.status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
          #  #  #  #  #  
                #  #  # ]
    1818                 :          0 :                 return -EINVAL;
    1819                 :            :         }
    1820                 :            : 
    1821         [ -  + ]:      77518 :         if (nvmf_request_alloc_wrs(rtransport, rdma_req, num_sgl_descriptors - 1) != 0) {
    1822                 :          0 :                 return -ENOMEM;
    1823                 :            :         }
    1824                 :            : 
    1825   [ +  -  +  - ]:      77518 :         rc = spdk_nvmf_request_get_buffers(req, &rgroup->group, &rtransport->transport, total_length);
    1826         [ -  + ]:      77518 :         if (rc != 0) {
    1827                 :          0 :                 nvmf_rdma_request_free_data(rdma_req, rtransport);
    1828                 :          0 :                 return rc;
    1829                 :            :         }
    1830                 :            : 
    1831                 :            :         /* When dif_insert_or_strip is true and the I/O data length is greater than one block,
    1832                 :            :          * the stripped_buffers are got for DIF stripping. */
    1833   [ +  +  +  -  :      77518 :         if (spdk_unlikely(req->dif_enabled && (req->xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST)
          +  +  +  +  +  
          -  +  -  -  +  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                      + ]
    1834                 :            :                           && (req->dif.elba_length > req->dif.dif_ctx.block_size))) {
    1835         [ +  - ]:          7 :                 rc = nvmf_request_get_stripped_buffers(req, &rgroup->group,
    1836   [ +  -  +  -  :          1 :                                                        &rtransport->transport, req->dif.orig_length);
             +  -  +  - ]
    1837         [ -  + ]:          6 :                 if (rc != 0) {
    1838   [ #  #  #  #  :          0 :                         SPDK_INFOLOG(rdma, "Get stripped buffers fail %d, fallback to req.iov.\n", rc);
                   #  # ]
    1839                 :          0 :                 }
    1840                 :          1 :         }
    1841                 :            : 
    1842                 :            :         /* The first WR must always be the embedded data WR. This is how we unwind them later. */
    1843   [ +  -  +  - ]:      77518 :         current_wr = &rdma_req->data.wr;
    1844   [ +  +  #  # ]:      77518 :         assert(current_wr != NULL);
    1845                 :            : 
    1846   [ +  -  +  - ]:      77518 :         req->length = 0;
    1847   [ +  -  +  - ]:      77518 :         rdma_req->iovpos = 0;
    1848   [ +  -  +  -  :      77518 :         desc = (struct spdk_nvme_sgl_descriptor *)rdma_req->recv->buf + inline_segment->address;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1849         [ +  + ]:     520510 :         for (i = 0; i < num_sgl_descriptors; i++) {
    1850                 :            :                 /* The descriptors must be keyed data block descriptors with an address, not an offset. */
    1851   [ +  -  +  +  :     442992 :                 if (spdk_unlikely(desc->generic.type != SPDK_NVME_SGL_TYPE_KEYED_DATA_BLOCK ||
          +  -  -  +  +  
          -  +  -  +  -  
                   -  + ]
    1852                 :            :                                   desc->keyed.subtype != SPDK_NVME_SGL_SUBTYPE_ADDRESS)) {
    1853                 :          0 :                         rc = -EINVAL;
    1854                 :          0 :                         goto err_exit;
    1855                 :            :                 }
    1856                 :            : 
    1857   [ +  +  +  -  :     442992 :                 if (spdk_likely(!req->dif_enabled)) {
             +  -  +  + ]
    1858   [ +  -  +  -  :     442980 :                         rc = nvmf_rdma_fill_wr_sgl(rgroup, device, rdma_req, current_wr, lengths[i]);
                   +  - ]
    1859                 :          8 :                 } else {
    1860                 :         14 :                         rc = nvmf_rdma_fill_wr_sgl_with_dif(rgroup, device, rdma_req, current_wr,
    1861   [ +  -  +  -  :         10 :                                                             lengths[i], 0);
                   +  - ]
    1862                 :            :                 }
    1863         [ -  + ]:     442992 :                 if (rc != 0) {
    1864                 :          0 :                         rc = -ENOMEM;
    1865                 :          0 :                         goto err_exit;
    1866                 :            :                 }
    1867                 :            : 
    1868   [ +  -  +  -  :     442992 :                 req->length += desc->keyed.length;
          +  -  +  -  +  
                      - ]
    1869   [ +  -  +  -  :     442992 :                 current_wr->wr.rdma.rkey = desc->keyed.key;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1870   [ +  -  +  -  :     442992 :                 current_wr->wr.rdma.remote_addr = desc->address;
          +  -  +  -  +  
                -  +  - ]
    1871   [ +  -  +  - ]:     442992 :                 current_wr = current_wr->next;
    1872         [ +  - ]:     442992 :                 desc++;
    1873                 :         10 :         }
    1874                 :            : 
    1875                 :            : #ifdef SPDK_CONFIG_RDMA_SEND_WITH_INVAL
    1876                 :            :         /* Go back to the last descriptor in the list. */
    1877         [ +  - ]:      77518 :         desc--;
    1878   [ +  +  +  -  :      77518 :         if ((device->attr.device_cap_flags & IBV_DEVICE_MEM_MGT_EXTENSIONS) != 0) {
             +  -  +  - ]
    1879   [ -  +  #  #  :      77488 :                 if (desc->keyed.subtype == SPDK_NVME_SGL_SUBTYPE_INVALIDATE_KEY) {
             #  #  #  # ]
    1880   [ #  #  #  #  :          0 :                         rdma_req->rsp.wr.opcode = IBV_WR_SEND_WITH_INV;
             #  #  #  # ]
    1881   [ #  #  #  #  :          0 :                         rdma_req->rsp.wr.imm_data = desc->keyed.key;
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1882                 :          0 :                 }
    1883                 :          0 :         }
    1884                 :            : #endif
    1885                 :            : 
    1886   [ +  -  +  - ]:      77518 :         rdma_req->num_outstanding_data_wr = num_sgl_descriptors;
    1887                 :            : 
    1888                 :      77518 :         return 0;
    1889                 :            : 
    1890                 :          0 : err_exit:
    1891   [ #  #  #  # ]:          0 :         spdk_nvmf_request_free_buffers(req, &rgroup->group, &rtransport->transport);
    1892                 :          0 :         nvmf_rdma_request_free_data(rdma_req, rtransport);
    1893                 :          0 :         return rc;
    1894                 :          5 : }
    1895                 :            : 
    1896                 :            : static int
    1897                 :    6916321 : nvmf_rdma_request_parse_sgl(struct spdk_nvmf_rdma_transport *rtransport,
    1898                 :            :                             struct spdk_nvmf_rdma_device *device,
    1899                 :            :                             struct spdk_nvmf_rdma_request *rdma_req)
    1900                 :            : {
    1901         [ +  - ]:    6916321 :         struct spdk_nvmf_request                *req = &rdma_req->req;
    1902                 :         25 :         struct spdk_nvme_cpl                    *rsp;
    1903                 :         25 :         struct spdk_nvme_sgl_descriptor         *sgl;
    1904                 :         25 :         int                                     rc;
    1905                 :         25 :         uint32_t                                length;
    1906                 :            : 
    1907   [ +  -  +  -  :    6916321 :         rsp = &req->rsp->nvme_cpl;
                   +  - ]
    1908   [ +  -  +  -  :    6916321 :         sgl = &req->cmd->nvme_cmd.dptr.sgl1;
          +  -  +  -  +  
                      - ]
    1909                 :            : 
    1910   [ +  +  +  -  :    6916321 :         if (sgl->generic.type == SPDK_NVME_SGL_TYPE_KEYED_DATA_BLOCK &&
          +  -  +  +  #  
                      # ]
    1911   [ +  +  +  -  :    5507181 :             (sgl->keyed.subtype == SPDK_NVME_SGL_SUBTYPE_ADDRESS ||
             +  -  -  + ]
    1912   [ +  -  #  #  :    2271138 :              sgl->keyed.subtype == SPDK_NVME_SGL_SUBTYPE_INVALIDATE_KEY)) {
                   #  # ]
    1913                 :            : 
    1914   [ +  -  +  -  :    5507181 :                 length = sgl->keyed.length;
                   +  - ]
    1915   [ +  +  +  -  :    5507181 :                 if (length > rtransport->transport.opts.max_io_size) {
          +  -  +  -  +  
                      + ]
    1916   [ +  -  +  -  :          6 :                         SPDK_ERRLOG("SGL length 0x%x exceeds max io size 0x%x\n",
             +  -  +  - ]
    1917                 :            :                                     length, rtransport->transport.opts.max_io_size);
    1918   [ +  -  +  -  :          6 :                         rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
                   +  - ]
    1919                 :          6 :                         return -1;
    1920                 :            :                 }
    1921                 :            : #ifdef SPDK_CONFIG_RDMA_SEND_WITH_INVAL
    1922   [ +  +  +  -  :    5507175 :                 if ((device->attr.device_cap_flags & IBV_DEVICE_MEM_MGT_EXTENSIONS) != 0) {
             +  -  +  - ]
    1923   [ +  +  #  #  :    5507079 :                         if (sgl->keyed.subtype == SPDK_NVME_SGL_SUBTYPE_INVALIDATE_KEY) {
             #  #  #  # ]
    1924   [ #  #  #  #  :    2271138 :                                 rdma_req->rsp.wr.opcode = IBV_WR_SEND_WITH_INV;
             #  #  #  # ]
    1925   [ #  #  #  #  :    2271138 :                                 rdma_req->rsp.wr.imm_data = sgl->keyed.key;
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1926                 :          0 :                         }
    1927                 :          0 :                 }
    1928                 :            : #endif
    1929                 :            : 
    1930                 :            :                 /* fill request length and populate iovs */
    1931   [ +  -  +  - ]:    5507175 :                 req->length = length;
    1932                 :            : 
    1933                 :    5507175 :                 rc = nvmf_rdma_request_fill_iovs(rtransport, device, rdma_req);
    1934         [ +  + ]:    5507175 :                 if (spdk_unlikely(rc < 0)) {
    1935         [ -  + ]:    1418737 :                         if (rc == -EINVAL) {
    1936                 :          0 :                                 SPDK_ERRLOG("SGL length exceeds the max I/O size\n");
    1937   [ #  #  #  #  :          0 :                                 rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
                   #  # ]
    1938                 :          0 :                                 return -1;
    1939                 :            :                         }
    1940                 :            :                         /* No available buffers. Queue this request up. */
    1941   [ +  +  +  +  :    1418737 :                         SPDK_DEBUGLOG(rdma, "No available large data buffers. Queueing request %p\n", rdma_req);
                   +  - ]
    1942                 :    1418737 :                         return 0;
    1943                 :            :                 }
    1944                 :            : 
    1945   [ +  +  +  +  :    4088438 :                 SPDK_DEBUGLOG(rdma, "Request %p took %d buffer/s from central pool\n", rdma_req,
          +  -  #  #  #  
                      # ]
    1946                 :            :                               req->iovcnt);
    1947                 :            : 
    1948                 :    4088438 :                 return 0;
    1949   [ +  +  +  -  :    1409143 :         } else if (sgl->generic.type == SPDK_NVME_SGL_TYPE_DATA_BLOCK &&
          +  -  +  +  -  
                      + ]
    1950   [ +  -  +  -  :    1331622 :                    sgl->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_OFFSET) {
                   +  - ]
    1951   [ +  -  +  - ]:    1331622 :                 uint64_t offset = sgl->address;
    1952   [ +  -  +  -  :    1331622 :                 uint32_t max_len = rtransport->transport.opts.in_capsule_data_size;
             +  -  +  - ]
    1953                 :            : 
    1954   [ +  +  +  +  :    1331622 :                 SPDK_DEBUGLOG(nvmf, "In-capsule data: offset 0x%" PRIx64 ", length 0x%x\n",
          +  -  #  #  #  
             #  #  #  #  
                      # ]
    1955                 :            :                               offset, sgl->unkeyed.length);
    1956                 :            : 
    1957         [ -  + ]:    1331622 :                 if (offset > max_len) {
    1958                 :          0 :                         SPDK_ERRLOG("In-capsule offset 0x%" PRIx64 " exceeds capsule length 0x%x\n",
    1959                 :            :                                     offset, max_len);
    1960   [ #  #  #  #  :          0 :                         rsp->status.sc = SPDK_NVME_SC_INVALID_SGL_OFFSET;
                   #  # ]
    1961                 :          0 :                         return -1;
    1962                 :            :                 }
    1963                 :    1331622 :                 max_len -= (uint32_t)offset;
    1964                 :            : 
    1965   [ +  +  +  -  :    1331622 :                 if (sgl->unkeyed.length > max_len) {
          +  -  +  -  +  
                      + ]
    1966   [ +  -  +  -  :         12 :                         SPDK_ERRLOG("In-capsule data length 0x%x exceeds capsule length 0x%x\n",
             +  -  +  - ]
    1967                 :            :                                     sgl->unkeyed.length, max_len);
    1968   [ +  -  +  -  :         12 :                         rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
                   +  - ]
    1969                 :         12 :                         return -1;
    1970                 :            :                 }
    1971                 :            : 
    1972   [ +  -  +  - ]:    1331610 :                 rdma_req->num_outstanding_data_wr = 0;
    1973   [ +  -  +  -  :    1331610 :                 req->data_from_pool = false;
                   +  - ]
    1974   [ +  -  +  -  :    1331610 :                 req->length = sgl->unkeyed.length;
          +  -  +  -  +  
                -  +  - ]
    1975                 :            : 
    1976   [ +  -  +  -  :    1331610 :                 req->iov[0].iov_base = rdma_req->recv->buf + offset;
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                      - ]
    1977   [ +  -  +  -  :    1331610 :                 req->iov[0].iov_len = req->length;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1978   [ +  -  +  - ]:    1331610 :                 req->iovcnt = 1;
    1979                 :            : 
    1980                 :    1331610 :                 return 0;
    1981   [ +  -  +  -  :      77526 :         } else if (sgl->generic.type == SPDK_NVME_SGL_TYPE_LAST_SEGMENT &&
          +  -  +  -  -  
                      + ]
    1982   [ +  -  +  -  :      77518 :                    sgl->unkeyed.subtype == SPDK_NVME_SGL_SUBTYPE_OFFSET) {
                   +  - ]
    1983                 :            : 
    1984                 :      77518 :                 rc = nvmf_rdma_request_fill_iovs_multi_sgl(rtransport, device, rdma_req);
    1985         [ -  + ]:      77518 :                 if (rc == -ENOMEM) {
    1986   [ #  #  #  #  :          0 :                         SPDK_DEBUGLOG(rdma, "No available large data buffers. Queueing request %p\n", rdma_req);
                   #  # ]
    1987                 :          0 :                         return 0;
    1988         [ -  + ]:      77518 :                 } else if (rc == -EINVAL) {
    1989                 :          0 :                         SPDK_ERRLOG("Multi SGL element request length exceeds the max I/O size\n");
    1990   [ #  #  #  #  :          0 :                         rsp->status.sc = SPDK_NVME_SC_DATA_SGL_LENGTH_INVALID;
                   #  # ]
    1991                 :          0 :                         return -1;
    1992                 :            :                 }
    1993                 :            : 
    1994   [ +  +  +  +  :      77518 :                 SPDK_DEBUGLOG(rdma, "Request %p took %d buffer/s from central pool\n", rdma_req,
          +  -  #  #  #  
                      # ]
    1995                 :            :                               req->iovcnt);
    1996                 :            : 
    1997                 :      77518 :                 return 0;
    1998                 :            :         }
    1999                 :            : 
    2000   [ #  #  #  #  :          0 :         SPDK_ERRLOG("Invalid NVMf I/O Command SGL:  Type 0x%x, Subtype 0x%x\n",
          #  #  #  #  #  
                #  #  # ]
    2001                 :            :                     sgl->generic.type, sgl->generic.subtype);
    2002   [ #  #  #  #  :          0 :         rsp->status.sc = SPDK_NVME_SC_SGL_DESCRIPTOR_TYPE_INVALID;
                   #  # ]
    2003                 :          0 :         return -1;
    2004                 :         25 : }
    2005                 :            : 
    2006                 :            : static void
    2007                 :    6740967 : _nvmf_rdma_request_free(struct spdk_nvmf_rdma_request *rdma_req,
    2008                 :            :                         struct spdk_nvmf_rdma_transport *rtransport)
    2009                 :            : {
    2010                 :          6 :         struct spdk_nvmf_rdma_qpair             *rqpair;
    2011                 :          6 :         struct spdk_nvmf_rdma_poll_group        *rgroup;
    2012                 :            : 
    2013   [ +  -  +  -  :    6740967 :         rqpair = SPDK_CONTAINEROF(rdma_req->req.qpair, struct spdk_nvmf_rdma_qpair, qpair);
                   +  - ]
    2014   [ +  +  +  -  :    6740967 :         if (rdma_req->req.data_from_pool) {
          +  -  +  -  +  
                      + ]
    2015   [ +  -  +  -  :    4165866 :                 rgroup = rqpair->poller->group;
             +  -  +  - ]
    2016                 :            : 
    2017   [ +  -  +  -  :    4165866 :                 spdk_nvmf_request_free_buffers(&rdma_req->req, &rgroup->group, &rtransport->transport);
                   +  - ]
    2018                 :          5 :         }
    2019   [ +  +  +  -  :    6740967 :         if (rdma_req->req.stripped_data) {
             +  -  -  + ]
    2020         [ #  # ]:          0 :                 nvmf_request_free_stripped_buffers(&rdma_req->req,
    2021   [ #  #  #  #  :          0 :                                                    &rqpair->poller->group->group,
          #  #  #  #  #  
                      # ]
    2022         [ #  # ]:          0 :                                                    &rtransport->transport);
    2023                 :          0 :         }
    2024                 :    6740967 :         nvmf_rdma_request_free_data(rdma_req, rtransport);
    2025   [ +  -  +  -  :    6740967 :         rdma_req->req.length = 0;
                   +  - ]
    2026   [ +  -  +  -  :    6740967 :         rdma_req->req.iovcnt = 0;
                   +  - ]
    2027   [ +  -  +  - ]:    6740967 :         rdma_req->offset = 0;
    2028   [ +  -  +  -  :    6740967 :         rdma_req->req.dif_enabled = false;
             +  -  +  - ]
    2029   [ +  -  +  - ]:    6740967 :         rdma_req->fused_failed = false;
    2030   [ +  -  +  - ]:    6740967 :         rdma_req->transfer_wr = NULL;
    2031   [ +  +  +  -  :    6740967 :         if (rdma_req->fused_pair) {
                   -  + ]
    2032                 :            :                 /* This req was part of a valid fused pair, but failed before it got to
    2033                 :            :                  * READ_TO_EXECUTE state.  This means we need to fail the other request
    2034                 :            :                  * in the pair, because it is no longer part of a valid pair.  If the pair
    2035                 :            :                  * already reached READY_TO_EXECUTE state, we need to kick it.
    2036                 :            :                  */
    2037   [ #  #  #  #  :          0 :                 rdma_req->fused_pair->fused_failed = true;
             #  #  #  # ]
    2038   [ #  #  #  #  :          0 :                 if (rdma_req->fused_pair->state == RDMA_REQUEST_STATE_READY_TO_EXECUTE) {
          #  #  #  #  #  
                      # ]
    2039   [ #  #  #  # ]:          0 :                         nvmf_rdma_request_process(rtransport, rdma_req->fused_pair);
    2040                 :          0 :                 }
    2041   [ #  #  #  # ]:          0 :                 rdma_req->fused_pair = NULL;
    2042                 :          0 :         }
    2043   [ +  +  +  -  :    6740967 :         memset(&rdma_req->req.dif, 0, sizeof(rdma_req->req.dif));
                   +  - ]
    2044         [ +  - ]:    6740967 :         rqpair->qd--;
    2045                 :            : 
    2046   [ +  +  +  -  :    6740967 :         STAILQ_INSERT_HEAD(&rqpair->resources->free_queue, rdma_req, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  +  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                -  +  - ]
    2047   [ +  -  +  - ]:    6740967 :         rdma_req->state = RDMA_REQUEST_STATE_FREE;
    2048                 :    6740967 : }
    2049                 :            : 
    2050                 :            : static void
    2051                 :    6740607 : nvmf_rdma_check_fused_ordering(struct spdk_nvmf_rdma_transport *rtransport,
    2052                 :            :                                struct spdk_nvmf_rdma_qpair *rqpair,
    2053                 :            :                                struct spdk_nvmf_rdma_request *rdma_req)
    2054                 :            : {
    2055                 :          6 :         enum spdk_nvme_cmd_fuse last, next;
    2056                 :            : 
    2057   [ +  +  +  -  :    6740607 :         last = rqpair->fused_first ? rqpair->fused_first->req.cmd->nvme_cmd.fuse : SPDK_NVME_CMD_FUSE_NONE;
          -  +  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    2058   [ +  -  +  -  :    6740607 :         next = rdma_req->req.cmd->nvme_cmd.fuse;
          +  -  +  -  +  
                      - ]
    2059                 :            : 
    2060   [ +  +  #  # ]:    6740607 :         assert(last != SPDK_NVME_CMD_FUSE_SECOND);
    2061                 :            : 
    2062   [ +  +  +  + ]:    6740607 :         if (spdk_likely(last == SPDK_NVME_CMD_FUSE_NONE && next == SPDK_NVME_CMD_FUSE_NONE)) {
    2063                 :    6738549 :                 return;
    2064                 :            :         }
    2065                 :            : 
    2066         [ +  + ]:       2058 :         if (last == SPDK_NVME_CMD_FUSE_FIRST) {
    2067         [ +  - ]:       1029 :                 if (next == SPDK_NVME_CMD_FUSE_SECOND) {
    2068                 :            :                         /* This is a valid pair of fused commands.  Point them at each other
    2069                 :            :                          * so they can be submitted consecutively once ready to be executed.
    2070                 :            :                          */
    2071   [ #  #  #  #  :       1029 :                         rqpair->fused_first->fused_pair = rdma_req;
             #  #  #  # ]
    2072   [ #  #  #  #  :       1029 :                         rdma_req->fused_pair = rqpair->fused_first;
             #  #  #  # ]
    2073   [ #  #  #  # ]:       1029 :                         rqpair->fused_first = NULL;
    2074                 :       1029 :                         return;
    2075                 :            :                 } else {
    2076                 :            :                         /* Mark the last req as failed since it wasn't followed by a SECOND. */
    2077   [ #  #  #  #  :          0 :                         rqpair->fused_first->fused_failed = true;
             #  #  #  # ]
    2078                 :            : 
    2079                 :            :                         /* If the last req is in READY_TO_EXECUTE state, then call
    2080                 :            :                          * nvmf_rdma_request_process(), otherwise nothing else will kick it.
    2081                 :            :                          */
    2082   [ #  #  #  #  :          0 :                         if (rqpair->fused_first->state == RDMA_REQUEST_STATE_READY_TO_EXECUTE) {
          #  #  #  #  #  
                      # ]
    2083   [ #  #  #  # ]:          0 :                                 nvmf_rdma_request_process(rtransport, rqpair->fused_first);
    2084                 :          0 :                         }
    2085                 :            : 
    2086   [ #  #  #  # ]:          0 :                         rqpair->fused_first = NULL;
    2087                 :            :                 }
    2088                 :          0 :         }
    2089                 :            : 
    2090         [ +  - ]:       1029 :         if (next == SPDK_NVME_CMD_FUSE_FIRST) {
    2091                 :            :                 /* Set rqpair->fused_first here so that we know to check that the next request
    2092                 :            :                  * is a SECOND (and to fail this one if it isn't).
    2093                 :            :                  */
    2094   [ #  #  #  # ]:       1029 :                 rqpair->fused_first = rdma_req;
    2095         [ #  # ]:          0 :         } else if (next == SPDK_NVME_CMD_FUSE_SECOND) {
    2096                 :            :                 /* Mark this req failed since it ia SECOND and the last one was not a FIRST. */
    2097   [ #  #  #  # ]:          0 :                 rdma_req->fused_failed = true;
    2098                 :          0 :         }
    2099         [ -  + ]:          6 : }
    2100                 :            : 
    2101                 :            : bool
    2102                 :   24928709 : nvmf_rdma_request_process(struct spdk_nvmf_rdma_transport *rtransport,
    2103                 :            :                           struct spdk_nvmf_rdma_request *rdma_req)
    2104                 :            : {
    2105                 :         23 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    2106                 :         23 :         struct spdk_nvmf_rdma_device    *device;
    2107                 :         23 :         struct spdk_nvmf_rdma_poll_group *rgroup;
    2108   [ +  -  +  -  :   24928709 :         struct spdk_nvme_cpl            *rsp = &rdma_req->req.rsp->nvme_cpl;
             +  -  +  - ]
    2109                 :         23 :         int                             rc;
    2110                 :         23 :         struct spdk_nvmf_rdma_recv      *rdma_recv;
    2111                 :         23 :         enum spdk_nvmf_rdma_request_state prev_state;
    2112                 :   24928709 :         bool                            progress = false;
    2113                 :        115 :         int                             data_posted;
    2114                 :         23 :         uint32_t                        num_blocks, num_rdma_reads_available, qdepth;
    2115                 :            : 
    2116   [ +  -  +  -  :   24928709 :         rqpair = SPDK_CONTAINEROF(rdma_req->req.qpair, struct spdk_nvmf_rdma_qpair, qpair);
                   +  - ]
    2117   [ +  -  +  - ]:   24928709 :         device = rqpair->device;
    2118   [ +  -  +  -  :   24928709 :         rgroup = rqpair->poller->group;
             +  -  +  - ]
    2119                 :            : 
    2120   [ +  +  +  -  :   24928709 :         assert(rdma_req->state != RDMA_REQUEST_STATE_FREE);
             +  -  #  # ]
    2121                 :            : 
    2122                 :            :         /* If the queue pair is in an error state, force the request to the completed state
    2123                 :            :          * to release resources. */
    2124   [ +  -  +  +  :   24928709 :         if (rqpair->ibv_state == IBV_QPS_ERR || rqpair->qpair.state != SPDK_NVMF_QPAIR_ACTIVE) {
          +  -  +  -  +  
             -  +  -  -  
                      + ]
    2125   [ -  -  -  -  :        868 :                 switch (rdma_req->state) {
             +  #  #  #  
                      # ]
    2126                 :          0 :                 case RDMA_REQUEST_STATE_NEED_BUFFER:
    2127   [ #  #  #  #  :          0 :                         STAILQ_REMOVE(&rgroup->group.pending_buf_queue, &rdma_req->req, spdk_nvmf_request, buf_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2128                 :          0 :                         break;
    2129                 :          0 :                 case RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING:
    2130   [ #  #  #  #  :          0 :                         STAILQ_REMOVE(&rqpair->pending_rdma_read_queue, rdma_req, spdk_nvmf_rdma_request, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2131                 :          0 :                         break;
    2132                 :          0 :                 case RDMA_REQUEST_STATE_DATA_TRANSFER_TO_HOST_PENDING:
    2133   [ #  #  #  #  :          0 :                         STAILQ_REMOVE(&rqpair->pending_rdma_write_queue, rdma_req, spdk_nvmf_rdma_request, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2134                 :          0 :                         break;
    2135                 :          0 :                 case RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING:
    2136   [ #  #  #  #  :          0 :                         STAILQ_REMOVE(&rqpair->pending_rdma_send_queue, rdma_req, spdk_nvmf_rdma_request, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2137                 :          0 :                         break;
    2138                 :        868 :                 default:
    2139                 :        868 :                         break;
    2140                 :            :                 }
    2141   [ #  #  #  # ]:        868 :                 rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    2142                 :          0 :         }
    2143                 :            : 
    2144                 :            :         /* The loop here is to allow for several back-to-back state changes. */
    2145                 :         23 :         do {
    2146   [ +  -  +  - ]:   71528967 :                 prev_state = rdma_req->state;
    2147                 :            : 
    2148   [ +  +  +  +  :   71528967 :                 SPDK_DEBUGLOG(rdma, "Request %p entering state %d\n", rdma_req, prev_state);
                   +  - ]
    2149                 :            : 
    2150   [ +  +  +  +  :   71528967 :                 switch (rdma_req->state) {
          +  +  +  +  +  
          +  +  +  +  +  
          +  +  +  +  +  
                      - ]
    2151                 :    6740073 :                 case RDMA_REQUEST_STATE_FREE:
    2152                 :            :                         /* Some external code must kick a request into RDMA_REQUEST_STATE_NEW
    2153                 :            :                          * to escape this state. */
    2154                 :    6740079 :                         break;
    2155                 :    6740601 :                 case RDMA_REQUEST_STATE_NEW:
    2156   [ +  +  +  -  :    6740607 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_NEW, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2157                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2158   [ +  -  +  - ]:    6740607 :                         rdma_recv = rdma_req->recv;
    2159                 :            : 
    2160                 :            :                         /* The first element of the SGL is the NVMe command */
    2161   [ +  -  +  -  :    6740607 :                         rdma_req->req.cmd = (union nvmf_h2c_msg *)rdma_recv->sgl[0].addr;
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
    2162   [ +  +  +  -  :    6740607 :                         memset(rdma_req->req.rsp, 0, sizeof(*rdma_req->req.rsp));
             +  -  +  - ]
    2163   [ +  -  +  -  :    6740607 :                         rdma_req->transfer_wr = &rdma_req->data.wr;
             +  -  +  - ]
    2164                 :            : 
    2165   [ +  -  +  +  :    6740607 :                         if (rqpair->ibv_state == IBV_QPS_ERR  || rqpair->qpair.state != SPDK_NVMF_QPAIR_ACTIVE) {
          +  -  +  -  +  
             -  +  -  -  
                      + ]
    2166   [ #  #  #  # ]:          0 :                                 rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    2167                 :          0 :                                 break;
    2168                 :            :                         }
    2169                 :            : 
    2170   [ +  +  +  -  :    6740607 :                         if (spdk_unlikely(spdk_nvmf_request_get_dif_ctx(&rdma_req->req, &rdma_req->req.dif.dif_ctx))) {
          +  -  +  -  +  
                      - ]
    2171   [ #  #  #  #  :          0 :                                 rdma_req->req.dif_enabled = true;
             #  #  #  # ]
    2172                 :          0 :                         }
    2173                 :            : 
    2174                 :    6740607 :                         nvmf_rdma_check_fused_ordering(rtransport, rqpair, rdma_req);
    2175                 :            : 
    2176                 :            : #ifdef SPDK_CONFIG_RDMA_SEND_WITH_INVAL
    2177   [ +  -  +  -  :    6740607 :                         rdma_req->rsp.wr.opcode = IBV_WR_SEND;
             +  -  +  - ]
    2178   [ +  -  +  -  :    6740607 :                         rdma_req->rsp.wr.imm_data = 0;
          +  -  +  -  +  
                      - ]
    2179                 :            : #endif
    2180                 :            : 
    2181                 :            :                         /* The next state transition depends on the data transfer needs of this request. */
    2182   [ +  -  +  -  :    6740607 :                         rdma_req->req.xfer = spdk_nvmf_req_get_xfer(&rdma_req->req);
             +  -  +  - ]
    2183                 :            : 
    2184   [ +  +  +  -  :    6740607 :                         if (spdk_unlikely(rdma_req->req.xfer == SPDK_NVME_DATA_BIDIRECTIONAL)) {
             +  -  +  + ]
    2185   [ +  -  +  -  :          6 :                                 rsp->status.sct = SPDK_NVME_SCT_GENERIC;
                   +  - ]
    2186   [ +  -  +  -  :          6 :                                 rsp->status.sc = SPDK_NVME_SC_INVALID_OPCODE;
                   +  - ]
    2187   [ +  -  +  -  :          6 :                                 STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, rdma_req, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2188   [ +  -  +  - ]:          6 :                                 rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    2189   [ +  +  +  +  :          6 :                                 SPDK_DEBUGLOG(rdma, "Request %p: invalid xfer type (BIDIRECTIONAL)\n", rdma_req);
                   +  - ]
    2190                 :          6 :                                 break;
    2191                 :            :                         }
    2192                 :            : 
    2193                 :            :                         /* If no data to transfer, ready to execute. */
    2194   [ +  +  +  -  :    6740601 :                         if (rdma_req->req.xfer == SPDK_NVME_DATA_NONE) {
             +  -  +  - ]
    2195   [ #  #  #  # ]:    1243131 :                                 rdma_req->state = RDMA_REQUEST_STATE_READY_TO_EXECUTE;
    2196                 :    1243131 :                                 break;
    2197                 :            :                         }
    2198                 :            : 
    2199   [ +  -  +  - ]:    5497470 :                         rdma_req->state = RDMA_REQUEST_STATE_NEED_BUFFER;
    2200   [ +  -  +  -  :    5497470 :                         STAILQ_INSERT_TAIL(&rgroup->group.pending_buf_queue, &rdma_req->req, buf_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2201                 :    5497470 :                         break;
    2202                 :    7486595 :                 case RDMA_REQUEST_STATE_NEED_BUFFER:
    2203   [ +  +  +  -  :    7486600 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_NEED_BUFFER, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2204                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2205                 :            : 
    2206   [ +  +  +  -  :    7486600 :                         assert(rdma_req->req.xfer != SPDK_NVME_DATA_NONE);
          +  -  -  +  #  
                      # ]
    2207                 :            : 
    2208   [ +  +  +  -  :    7486600 :                         if (&rdma_req->req != STAILQ_FIRST(&rgroup->group.pending_buf_queue)) {
          +  -  +  -  +  
                -  -  + ]
    2209                 :            :                                 /* This request needs to wait in line to obtain a buffer */
    2210                 :     570399 :                                 break;
    2211                 :            :                         }
    2212                 :            : 
    2213                 :            :                         /* Try to get a data buffer */
    2214                 :    6916201 :                         rc = nvmf_rdma_request_parse_sgl(rtransport, device, rdma_req);
    2215         [ +  + ]:    6916201 :                         if (rc < 0) {
    2216   [ #  #  #  #  :          0 :                                 STAILQ_REMOVE_HEAD(&rgroup->group.pending_buf_queue, buf_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2217   [ #  #  #  #  :          0 :                                 STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, rdma_req, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2218   [ #  #  #  # ]:          0 :                                 rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    2219                 :          0 :                                 break;
    2220                 :            :                         }
    2221                 :            : 
    2222   [ +  +  +  -  :    6916201 :                         if (rdma_req->req.iovcnt == 0) {
             +  -  -  + ]
    2223                 :            :                                 /* No buffers available. */
    2224   [ #  #  #  # ]:    1418731 :                                 rgroup->stat.pending_data_buffer++;
    2225                 :    1418731 :                                 break;
    2226                 :            :                         }
    2227                 :            : 
    2228   [ +  +  +  -  :    5497470 :                         STAILQ_REMOVE_HEAD(&rgroup->group.pending_buf_queue, buf_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  -  +  
          +  -  +  -  +  
          -  +  -  +  -  
             +  -  +  - ]
    2229                 :            : 
    2230                 :            :                         /* If data is transferring from host to controller and the data didn't
    2231                 :            :                          * arrive using in capsule data, we need to do a transfer from the host.
    2232                 :            :                          */
    2233   [ +  +  +  +  :    5497474 :                         if (rdma_req->req.xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER &&
          +  -  +  +  -  
                      + ]
    2234   [ +  -  +  -  :          4 :                             rdma_req->req.data_from_pool) {
             +  -  +  - ]
    2235   [ +  -  +  -  :     651896 :                                 STAILQ_INSERT_TAIL(&rqpair->pending_rdma_read_queue, rdma_req, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2236   [ +  -  +  - ]:     651896 :                                 rdma_req->state = RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING;
    2237                 :     651896 :                                 break;
    2238                 :            :                         }
    2239                 :            : 
    2240   [ +  -  +  - ]:    4845574 :                         rdma_req->state = RDMA_REQUEST_STATE_READY_TO_EXECUTE;
    2241                 :    4845574 :                         break;
    2242                 :    2375127 :                 case RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING:
    2243   [ +  +  +  -  :    2375131 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2244                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2245                 :            : 
    2246   [ +  +  +  -  :    2375131 :                         if (rdma_req != STAILQ_FIRST(&rqpair->pending_rdma_read_queue)) {
             +  -  -  + ]
    2247                 :            :                                 /* This request needs to wait in line to perform RDMA */
    2248                 :     371103 :                                 break;
    2249                 :            :                         }
    2250   [ +  +  +  -  :    2004028 :                         assert(rqpair->max_send_depth >= rqpair->current_send_depth);
          +  -  +  -  -  
                +  #  # ]
    2251   [ +  -  +  -  :    2004028 :                         qdepth = rqpair->max_send_depth - rqpair->current_send_depth;
             +  -  +  - ]
    2252   [ +  +  +  -  :    2004028 :                         assert(rqpair->max_read_depth >= rqpair->current_read_depth);
          +  -  +  -  -  
                +  #  # ]
    2253   [ +  -  +  -  :    2004028 :                         num_rdma_reads_available = rqpair->max_read_depth - rqpair->current_read_depth;
             +  -  +  - ]
    2254   [ +  +  +  -  :    2004032 :                         if (rdma_req->num_outstanding_data_wr > qdepth ||
             +  -  -  + ]
    2255   [ +  +  +  - ]:    2003674 :                             rdma_req->num_outstanding_data_wr > num_rdma_reads_available) {
    2256   [ +  +  +  + ]:    1352132 :                                 if (num_rdma_reads_available && qdepth) {
    2257                 :            :                                         /* Send as much as we can */
    2258   [ #  #  #  # ]:      12152 :                                         request_prepare_transfer_in_part(&rdma_req->req, spdk_min(num_rdma_reads_available, qdepth));
    2259                 :          0 :                                 } else {
    2260                 :            :                                         /* We can only have so many WRs outstanding. we have to wait until some finish. */
    2261   [ #  #  #  #  :    1339980 :                                         rqpair->poller->stat.pending_rdma_read++;
             #  #  #  # ]
    2262                 :    1339980 :                                         break;
    2263                 :            :                                 }
    2264                 :          0 :                         }
    2265                 :            : 
    2266                 :            :                         /* We have already verified that this request is the head of the queue. */
    2267   [ +  +  +  -  :     664048 :                         if (rdma_req->num_remaining_data_wr == 0) {
                   -  + ]
    2268   [ +  +  +  -  :     651896 :                                 STAILQ_REMOVE_HEAD(&rqpair->pending_rdma_read_queue, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  -  
          +  +  -  +  -  
          +  -  +  -  +  
                      - ]
    2269                 :          4 :                         }
    2270                 :            : 
    2271         [ +  - ]:     664048 :                         rc = request_transfer_in(&rdma_req->req);
    2272         [ +  + ]:     664048 :                         if (!rc) {
    2273   [ +  -  +  - ]:     664048 :                                 rdma_req->state = RDMA_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER;
    2274                 :          4 :                         } else {
    2275   [ #  #  #  #  :          0 :                                 rsp->status.sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
                   #  # ]
    2276   [ #  #  #  #  :          0 :                                 STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, rdma_req, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2277   [ #  #  #  # ]:          0 :                                 rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    2278                 :            :                         }
    2279                 :     664048 :                         break;
    2280                 :     991293 :                 case RDMA_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER:
    2281   [ +  +  +  -  :     991297 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2282                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2283                 :            :                         /* Some external code must kick a request into RDMA_REQUEST_STATE_READY_TO_EXECUTE
    2284                 :            :                          * to escape this state. */
    2285                 :     991297 :                         break;
    2286                 :    6740596 :                 case RDMA_REQUEST_STATE_READY_TO_EXECUTE:
    2287   [ +  +  +  -  :    6740601 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_READY_TO_EXECUTE, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2288                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2289                 :            : 
    2290   [ +  +  +  -  :    6740601 :                         if (spdk_unlikely(rdma_req->req.dif_enabled)) {
          +  -  +  -  +  
                      - ]
    2291   [ #  #  #  #  :          0 :                                 if (rdma_req->req.xfer == SPDK_NVME_DATA_HOST_TO_CONTROLLER) {
             #  #  #  # ]
    2292                 :            :                                         /* generate DIF for write operation */
    2293   [ #  #  #  #  :          0 :                                         num_blocks = SPDK_CEIL_DIV(rdma_req->req.dif.elba_length, rdma_req->req.dif.dif_ctx.block_size);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    2294   [ #  #  #  # ]:          0 :                                         assert(num_blocks > 0);
    2295                 :            : 
    2296   [ #  #  #  #  :          0 :                                         rc = spdk_dif_generate(rdma_req->req.iov, rdma_req->req.iovcnt,
          #  #  #  #  #  
                      # ]
    2297   [ #  #  #  #  :          0 :                                                                num_blocks, &rdma_req->req.dif.dif_ctx);
                   #  # ]
    2298         [ #  # ]:          0 :                                         if (rc != 0) {
    2299                 :          0 :                                                 SPDK_ERRLOG("DIF generation failed\n");
    2300   [ #  #  #  # ]:          0 :                                                 rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    2301         [ #  # ]:          0 :                                                 spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    2302                 :          0 :                                                 break;
    2303                 :            :                                         }
    2304                 :          0 :                                 }
    2305                 :            : 
    2306   [ #  #  #  #  :          0 :                                 assert(rdma_req->req.dif.elba_length >= rdma_req->req.length);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2307                 :            :                                 /* set extended length before IO operation */
    2308   [ #  #  #  #  :          0 :                                 rdma_req->req.length = rdma_req->req.dif.elba_length;
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2309                 :          0 :                         }
    2310                 :            : 
    2311   [ +  +  +  -  :    6740601 :                         if (rdma_req->req.cmd->nvme_cmd.fuse != SPDK_NVME_CMD_FUSE_NONE) {
          +  -  +  -  +  
                -  +  - ]
    2312   [ -  +  -  +  :       2058 :                                 if (rdma_req->fused_failed) {
             #  #  #  # ]
    2313                 :            :                                         /* This request failed FUSED semantics.  Fail it immediately, without
    2314                 :            :                                          * even sending it to the target layer.
    2315                 :            :                                          */
    2316   [ #  #  #  #  :          0 :                                         rsp->status.sct = SPDK_NVME_SCT_GENERIC;
                   #  # ]
    2317   [ #  #  #  #  :          0 :                                         rsp->status.sc = SPDK_NVME_SC_ABORTED_MISSING_FUSED;
                   #  # ]
    2318   [ #  #  #  #  :          0 :                                         STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, rdma_req, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2319   [ #  #  #  # ]:          0 :                                         rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    2320                 :          0 :                                         break;
    2321                 :            :                                 }
    2322                 :            : 
    2323   [ +  +  #  #  :       2058 :                                 if (rdma_req->fused_pair == NULL ||
             #  #  #  # ]
    2324   [ +  -  #  #  :       1029 :                                     rdma_req->fused_pair->state != RDMA_REQUEST_STATE_READY_TO_EXECUTE) {
             #  #  #  # ]
    2325                 :            :                                         /* This request is ready to execute, but either we don't know yet if it's
    2326                 :            :                                          * valid - i.e. this is a FIRST but we haven't received the next
    2327                 :            :                                          * request yet or the other request of this fused pair isn't ready to
    2328                 :            :                                          * execute.  So break here and this request will get processed later either
    2329                 :            :                                          * when the other request is ready or we find that this request isn't valid.
    2330                 :            :                                          */
    2331                 :          0 :                                         break;
    2332                 :            :                                 }
    2333                 :          0 :                         }
    2334                 :            : 
    2335                 :            :                         /* If we get to this point, and this request is a fused command, we know that
    2336                 :            :                          * it is part of valid sequence (FIRST followed by a SECOND) and that both
    2337                 :            :                          * requests are READY_TO_EXECUTE. So call spdk_nvmf_request_exec() both on this
    2338                 :            :                          * request, and the other request of the fused pair, in the correct order.
    2339                 :            :                          * Also clear the ->fused_pair pointers on both requests, since after this point
    2340                 :            :                          * we no longer need to maintain the relationship between these two requests.
    2341                 :            :                          */
    2342   [ +  +  +  -  :    6739572 :                         if (rdma_req->req.cmd->nvme_cmd.fuse == SPDK_NVME_CMD_FUSE_SECOND) {
          +  -  +  -  +  
                -  +  - ]
    2343   [ -  +  #  #  :       1029 :                                 assert(rdma_req->fused_pair != NULL);
             #  #  #  # ]
    2344   [ -  +  #  #  :       1029 :                                 assert(rdma_req->fused_pair->fused_pair != NULL);
          #  #  #  #  #  
                #  #  # ]
    2345   [ #  #  #  #  :       1029 :                                 rdma_req->fused_pair->state = RDMA_REQUEST_STATE_EXECUTING;
             #  #  #  # ]
    2346   [ #  #  #  #  :       1029 :                                 spdk_nvmf_request_exec(&rdma_req->fused_pair->req);
                   #  # ]
    2347   [ #  #  #  #  :       1029 :                                 rdma_req->fused_pair->fused_pair = NULL;
             #  #  #  # ]
    2348   [ #  #  #  # ]:       1029 :                                 rdma_req->fused_pair = NULL;
    2349                 :          0 :                         }
    2350   [ +  -  +  - ]:    6739572 :                         rdma_req->state = RDMA_REQUEST_STATE_EXECUTING;
    2351         [ +  - ]:    6739572 :                         spdk_nvmf_request_exec(&rdma_req->req);
    2352   [ +  +  +  -  :    6739572 :                         if (rdma_req->req.cmd->nvme_cmd.fuse == SPDK_NVME_CMD_FUSE_FIRST) {
          +  -  +  -  +  
                -  +  - ]
    2353   [ #  #  #  #  :          0 :                                 assert(rdma_req->fused_pair != NULL);
             #  #  #  # ]
    2354   [ #  #  #  #  :          0 :                                 assert(rdma_req->fused_pair->fused_pair != NULL);
          #  #  #  #  #  
                #  #  # ]
    2355   [ #  #  #  #  :          0 :                                 rdma_req->fused_pair->state = RDMA_REQUEST_STATE_EXECUTING;
             #  #  #  # ]
    2356   [ #  #  #  #  :          0 :                                 spdk_nvmf_request_exec(&rdma_req->fused_pair->req);
                   #  # ]
    2357   [ #  #  #  #  :          0 :                                 rdma_req->fused_pair->fused_pair = NULL;
             #  #  #  # ]
    2358   [ #  #  #  # ]:          0 :                                 rdma_req->fused_pair = NULL;
    2359                 :          0 :                         }
    2360                 :    6739572 :                         break;
    2361                 :    5348658 :                 case RDMA_REQUEST_STATE_EXECUTING:
    2362   [ +  +  +  -  :    5348663 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_EXECUTING, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2363                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2364                 :            :                         /* Some external code must kick a request into RDMA_REQUEST_STATE_EXECUTED
    2365                 :            :                          * to escape this state. */
    2366                 :    5348663 :                         break;
    2367                 :    6739485 :                 case RDMA_REQUEST_STATE_EXECUTED:
    2368   [ +  +  +  -  :    6739490 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_EXECUTED, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2369                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2370   [ +  +  +  -  :    6739495 :                         if (rsp->status.sc == SPDK_NVME_SC_SUCCESS &&
          +  -  +  -  +  
                      + ]
    2371   [ +  +  +  -  :    5331983 :                             rdma_req->req.xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST) {
                   +  - ]
    2372   [ +  -  +  -  :    3322477 :                                 STAILQ_INSERT_TAIL(&rqpair->pending_rdma_write_queue, rdma_req, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2373   [ +  -  +  - ]:    3322477 :                                 rdma_req->state = RDMA_REQUEST_STATE_DATA_TRANSFER_TO_HOST_PENDING;
    2374                 :          1 :                         } else {
    2375   [ +  -  +  -  :    3417013 :                                 STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, rdma_req, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2376   [ +  -  +  - ]:    3417013 :                                 rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    2377                 :            :                         }
    2378   [ +  +  +  -  :    6739490 :                         if (spdk_unlikely(rdma_req->req.dif_enabled)) {
          +  -  +  -  -  
                      + ]
    2379                 :            :                                 /* restore the original length */
    2380   [ #  #  #  #  :          0 :                                 rdma_req->req.length = rdma_req->req.dif.orig_length;
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2381                 :            : 
    2382   [ #  #  #  #  :          0 :                                 if (rdma_req->req.xfer == SPDK_NVME_DATA_CONTROLLER_TO_HOST) {
             #  #  #  # ]
    2383                 :          0 :                                         struct spdk_dif_error error_blk;
    2384                 :            : 
    2385   [ #  #  #  #  :          0 :                                         num_blocks = SPDK_CEIL_DIV(rdma_req->req.dif.elba_length, rdma_req->req.dif.dif_ctx.block_size);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    2386   [ #  #  #  #  :          0 :                                         if (!rdma_req->req.stripped_data) {
             #  #  #  # ]
    2387   [ #  #  #  #  :          0 :                                                 rc = spdk_dif_verify(rdma_req->req.iov, rdma_req->req.iovcnt, num_blocks,
          #  #  #  #  #  
                      # ]
    2388   [ #  #  #  #  :          0 :                                                                      &rdma_req->req.dif.dif_ctx, &error_blk);
                   #  # ]
    2389                 :          0 :                                         } else {
    2390   [ #  #  #  #  :          0 :                                                 rc = spdk_dif_verify_copy(rdma_req->req.stripped_data->iov,
             #  #  #  # ]
    2391   [ #  #  #  #  :          0 :                                                                           rdma_req->req.stripped_data->iovcnt,
          #  #  #  #  #  
                      # ]
    2392   [ #  #  #  #  :          0 :                                                                           rdma_req->req.iov, rdma_req->req.iovcnt, num_blocks,
          #  #  #  #  #  
                      # ]
    2393   [ #  #  #  #  :          0 :                                                                           &rdma_req->req.dif.dif_ctx, &error_blk);
                   #  # ]
    2394                 :            :                                         }
    2395         [ #  # ]:          0 :                                         if (rc) {
    2396   [ #  #  #  #  :          0 :                                                 struct spdk_nvme_cpl *rsp = &rdma_req->req.rsp->nvme_cpl;
             #  #  #  # ]
    2397                 :            : 
    2398         [ #  # ]:          0 :                                                 SPDK_ERRLOG("DIF error detected. type=%d, offset=%" PRIu32 "\n", error_blk.err_type,
    2399                 :            :                                                             error_blk.err_offset);
    2400   [ #  #  #  #  :          0 :                                                 rsp->status.sct = SPDK_NVME_SCT_MEDIA_ERROR;
                   #  # ]
    2401   [ #  #  #  #  :          0 :                                                 rsp->status.sc = nvmf_rdma_dif_error_to_compl_status(error_blk.err_type);
                   #  # ]
    2402   [ #  #  #  #  :          0 :                                                 STAILQ_REMOVE(&rqpair->pending_rdma_write_queue, rdma_req, spdk_nvmf_rdma_request, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2403   [ #  #  #  #  :          0 :                                                 STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, rdma_req, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2404   [ #  #  #  # ]:          0 :                                                 rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    2405                 :          0 :                                         }
    2406                 :          0 :                                 }
    2407                 :          0 :                         }
    2408                 :    6739490 :                         break;
    2409                 :    3339392 :                 case RDMA_REQUEST_STATE_DATA_TRANSFER_TO_HOST_PENDING:
    2410   [ +  +  +  -  :    3339393 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_DATA_TRANSFER_TO_HOST_PENDING, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2411                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2412                 :            : 
    2413   [ +  +  -  +  :    3339393 :                         if (rdma_req != STAILQ_FIRST(&rqpair->pending_rdma_write_queue)) {
             -  +  -  + ]
    2414                 :            :                                 /* This request needs to wait in line to perform RDMA */
    2415                 :       5050 :                                 break;
    2416                 :            :                         }
    2417   [ +  -  +  -  :    3334344 :                         if ((rqpair->current_send_depth + rdma_req->num_outstanding_data_wr + 1) >
          +  -  +  -  -  
                      + ]
    2418   [ +  +  +  - ]:    3334343 :                             rqpair->max_send_depth) {
    2419                 :            :                                 /* We can only have so many WRs outstanding. we have to wait until some finish.
    2420                 :            :                                  * +1 since each request has an additional wr in the resp. */
    2421   [ #  #  #  #  :      11866 :                                 rqpair->poller->stat.pending_rdma_write++;
             #  #  #  # ]
    2422                 :      11866 :                                 break;
    2423                 :            :                         }
    2424                 :            : 
    2425                 :            :                         /* We have already verified that this request is the head of the queue. */
    2426   [ +  +  +  -  :    3322477 :                         STAILQ_REMOVE_HEAD(&rqpair->pending_rdma_write_queue, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  -  
          +  +  -  +  -  
          +  -  +  -  +  
                      - ]
    2427                 :            : 
    2428                 :            :                         /* The data transfer will be kicked off from
    2429                 :            :                          * RDMA_REQUEST_STATE_READY_TO_COMPLETE state.
    2430                 :            :                          * We verified that data + response fit into send queue, so we can go to the next state directly
    2431                 :            :                          */
    2432   [ +  -  +  - ]:    3322477 :                         rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE;
    2433                 :    3322477 :                         break;
    2434                 :    3417119 :                 case RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING:
    2435   [ +  +  +  -  :    3417126 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2436                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2437                 :            : 
    2438   [ +  +  +  -  :    3417126 :                         if (rdma_req != STAILQ_FIRST(&rqpair->pending_rdma_send_queue)) {
             +  -  -  + ]
    2439                 :            :                                 /* This request needs to wait in line to send the completion */
    2440                 :         16 :                                 break;
    2441                 :            :                         }
    2442                 :            : 
    2443   [ +  +  +  -  :    3417110 :                         assert(rqpair->current_send_depth <= rqpair->max_send_depth);
          +  -  +  -  -  
                +  #  # ]
    2444   [ +  +  +  -  :    3417110 :                         if (rqpair->current_send_depth == rqpair->max_send_depth) {
          +  -  +  -  +  
                      + ]
    2445                 :            :                                 /* We can only have so many WRs outstanding. we have to wait until some finish */
    2446   [ +  -  +  -  :         91 :                                 rqpair->poller->stat.pending_rdma_send++;
             +  -  +  - ]
    2447                 :         91 :                                 break;
    2448                 :            :                         }
    2449                 :            : 
    2450                 :            :                         /* We have already verified that this request is the head of the queue. */
    2451   [ +  +  +  -  :    3417019 :                         STAILQ_REMOVE_HEAD(&rqpair->pending_rdma_send_queue, state_link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  -  
          +  +  -  +  -  
          +  -  +  -  +  
                      - ]
    2452                 :            : 
    2453                 :            :                         /* The response sending will be kicked off from
    2454                 :            :                          * RDMA_REQUEST_STATE_READY_TO_COMPLETE state.
    2455                 :            :                          */
    2456   [ +  -  +  - ]:    3417019 :                         rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE;
    2457                 :    3417019 :                         break;
    2458                 :    6739490 :                 case RDMA_REQUEST_STATE_READY_TO_COMPLETE:
    2459   [ +  +  +  -  :    6739496 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_READY_TO_COMPLETE, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2460                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2461         [ +  - ]:    6739496 :                         rc = request_transfer_out(&rdma_req->req, &data_posted);
    2462   [ -  +  #  # ]:    6739496 :                         assert(rc == 0); /* No good way to handle this currently */
    2463         [ -  + ]:    6739496 :                         if (rc) {
    2464   [ #  #  #  # ]:          0 :                                 rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    2465                 :          0 :                         } else {
    2466   [ +  +  -  + ]:    6739496 :                                 rdma_req->state = data_posted ? RDMA_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST :
    2467                 :            :                                                   RDMA_REQUEST_STATE_COMPLETING;
    2468                 :            :                         }
    2469                 :    6739496 :                         break;
    2470                 :    3325471 :                 case RDMA_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST:
    2471   [ +  +  +  -  :    3325472 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2472                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2473                 :            :                         /* Some external code must kick a request into RDMA_REQUEST_STATE_COMPLETED
    2474                 :            :                          * to escape this state. */
    2475                 :    3325472 :                         break;
    2476                 :    4804928 :                 case RDMA_REQUEST_STATE_COMPLETING:
    2477   [ +  +  +  -  :    4804933 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_COMPLETING, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2478                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2479                 :            :                         /* Some external code must kick a request into RDMA_REQUEST_STATE_COMPLETED
    2480                 :            :                          * to escape this state. */
    2481                 :    4804933 :                         break;
    2482                 :    6740073 :                 case RDMA_REQUEST_STATE_COMPLETED:
    2483   [ +  +  +  -  :    6740079 :                         spdk_trace_record(TRACE_RDMA_REQUEST_STATE_COMPLETED, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2484                 :            :                                           (uintptr_t)rdma_req, (uintptr_t)rqpair);
    2485                 :            : 
    2486   [ -  +  -  +  :    6740079 :                         rqpair->poller->stat.request_latency += spdk_get_ticks() - rdma_req->receive_tsc;
          -  +  -  +  -  
             +  -  +  -  
                      + ]
    2487                 :    6740079 :                         _nvmf_rdma_request_free(rdma_req, rtransport);
    2488                 :    6740079 :                         break;
    2489                 :          0 :                 case RDMA_REQUEST_NUM_STATES:
    2490                 :            :                 default:
    2491         [ #  # ]:          0 :                         assert(0);
    2492                 :            :                         break;
    2493                 :            :                 }
    2494                 :            : 
    2495   [ +  +  +  -  :   71528967 :                 if (rdma_req->state != prev_state) {
                   +  + ]
    2496                 :   46600258 :                         progress = true;
    2497                 :         43 :                 }
    2498   [ +  +  +  -  :   71528967 :         } while (rdma_req->state != prev_state);
                   +  + ]
    2499                 :            : 
    2500         [ +  - ]:   24928709 :         return progress;
    2501                 :         23 : }
    2502                 :            : 
    2503                 :            : /* Public API callbacks begin here */
    2504                 :            : 
    2505                 :            : #define SPDK_NVMF_RDMA_DEFAULT_MAX_QUEUE_DEPTH 128
    2506                 :            : #define SPDK_NVMF_RDMA_DEFAULT_AQ_DEPTH 128
    2507                 :            : #define SPDK_NVMF_RDMA_DEFAULT_SRQ_DEPTH 4096
    2508                 :            : #define SPDK_NVMF_RDMA_DEFAULT_MAX_QPAIRS_PER_CTRLR 128
    2509                 :            : #define SPDK_NVMF_RDMA_DEFAULT_IN_CAPSULE_DATA_SIZE 4096
    2510                 :            : #define SPDK_NVMF_RDMA_DEFAULT_MAX_IO_SIZE 131072
    2511                 :            : #define SPDK_NVMF_RDMA_MIN_IO_BUFFER_SIZE (SPDK_NVMF_RDMA_DEFAULT_MAX_IO_SIZE / SPDK_NVMF_MAX_SGL_ENTRIES)
    2512                 :            : #define SPDK_NVMF_RDMA_DEFAULT_NUM_SHARED_BUFFERS 4095
    2513                 :            : #define SPDK_NVMF_RDMA_DEFAULT_BUFFER_CACHE_SIZE UINT32_MAX
    2514                 :            : #define SPDK_NVMF_RDMA_DEFAULT_NO_SRQ false
    2515                 :            : #define SPDK_NVMF_RDMA_DIF_INSERT_OR_STRIP false
    2516                 :            : #define SPDK_NVMF_RDMA_ACCEPTOR_BACKLOG 100
    2517                 :            : #define SPDK_NVMF_RDMA_DEFAULT_ABORT_TIMEOUT_SEC 1
    2518                 :            : #define SPDK_NVMF_RDMA_DEFAULT_NO_WR_BATCHING false
    2519                 :            : 
    2520                 :            : static void
    2521                 :         45 : nvmf_rdma_opts_init(struct spdk_nvmf_transport_opts *opts)
    2522                 :            : {
    2523   [ +  -  +  - ]:         45 :         opts->max_queue_depth =              SPDK_NVMF_RDMA_DEFAULT_MAX_QUEUE_DEPTH;
    2524   [ +  -  +  - ]:         45 :         opts->max_qpairs_per_ctrlr = SPDK_NVMF_RDMA_DEFAULT_MAX_QPAIRS_PER_CTRLR;
    2525   [ +  -  +  - ]:         45 :         opts->in_capsule_data_size = SPDK_NVMF_RDMA_DEFAULT_IN_CAPSULE_DATA_SIZE;
    2526   [ +  -  +  - ]:         45 :         opts->max_io_size =          SPDK_NVMF_RDMA_DEFAULT_MAX_IO_SIZE;
    2527   [ +  -  +  - ]:         45 :         opts->io_unit_size =         SPDK_NVMF_RDMA_MIN_IO_BUFFER_SIZE;
    2528   [ +  -  +  - ]:         45 :         opts->max_aq_depth =         SPDK_NVMF_RDMA_DEFAULT_AQ_DEPTH;
    2529   [ +  -  +  - ]:         45 :         opts->num_shared_buffers =   SPDK_NVMF_RDMA_DEFAULT_NUM_SHARED_BUFFERS;
    2530   [ +  -  +  - ]:         45 :         opts->buf_cache_size =               SPDK_NVMF_RDMA_DEFAULT_BUFFER_CACHE_SIZE;
    2531   [ +  -  +  - ]:         45 :         opts->dif_insert_or_strip =  SPDK_NVMF_RDMA_DIF_INSERT_OR_STRIP;
    2532   [ +  -  +  - ]:         45 :         opts->abort_timeout_sec =    SPDK_NVMF_RDMA_DEFAULT_ABORT_TIMEOUT_SEC;
    2533   [ +  -  +  - ]:         45 :         opts->transport_specific =      NULL;
    2534                 :         45 : }
    2535                 :            : 
    2536                 :            : static int nvmf_rdma_destroy(struct spdk_nvmf_transport *transport,
    2537                 :            :                              spdk_nvmf_transport_destroy_done_cb cb_fn, void *cb_arg);
    2538                 :            : 
    2539                 :            : static inline bool
    2540                 :       2165 : nvmf_rdma_is_rxe_device(struct spdk_nvmf_rdma_device *device)
    2541                 :            : {
    2542   [ +  -  #  #  :       4330 :         return device->attr.vendor_id == SPDK_RDMA_RXE_VENDOR_ID_OLD ||
             #  #  #  # ]
    2543   [ -  +  #  #  :       2165 :                device->attr.vendor_id == SPDK_RDMA_RXE_VENDOR_ID_NEW;
                   #  # ]
    2544                 :            : }
    2545                 :            : 
    2546                 :            : static int nvmf_rdma_accept(void *ctx);
    2547                 :            : static bool nvmf_rdma_retry_listen_port(struct spdk_nvmf_rdma_transport *rtransport);
    2548                 :            : static void destroy_ib_device(struct spdk_nvmf_rdma_transport *rtransport,
    2549                 :            :                               struct spdk_nvmf_rdma_device *device);
    2550                 :            : 
    2551                 :            : static int
    2552                 :         78 : create_ib_device(struct spdk_nvmf_rdma_transport *rtransport, struct ibv_context *context,
    2553                 :            :                  struct spdk_nvmf_rdma_device **new_device)
    2554                 :            : {
    2555                 :          0 :         struct spdk_nvmf_rdma_device    *device;
    2556                 :         78 :         int                             flag = 0;
    2557                 :         78 :         int                             rc = 0;
    2558                 :            : 
    2559                 :         78 :         device = calloc(1, sizeof(*device));
    2560         [ -  + ]:         78 :         if (!device) {
    2561                 :          0 :                 SPDK_ERRLOG("Unable to allocate memory for RDMA devices.\n");
    2562                 :          0 :                 return -ENOMEM;
    2563                 :            :         }
    2564   [ #  #  #  # ]:         78 :         device->context = context;
    2565   [ #  #  #  #  :         78 :         rc = ibv_query_device(device->context, &device->attr);
                   #  # ]
    2566         [ -  + ]:         78 :         if (rc < 0) {
    2567                 :          0 :                 SPDK_ERRLOG("Failed to query RDMA device attributes.\n");
    2568                 :          0 :                 free(device);
    2569                 :          0 :                 return rc;
    2570                 :            :         }
    2571                 :            : 
    2572                 :            : #ifdef SPDK_CONFIG_RDMA_SEND_WITH_INVAL
    2573   [ -  +  #  #  :         78 :         if ((device->attr.device_cap_flags & IBV_DEVICE_MEM_MGT_EXTENSIONS) == 0) {
             #  #  #  # ]
    2574                 :          0 :                 SPDK_WARNLOG("The libibverbs on this system supports SEND_WITH_INVALIDATE,");
    2575   [ #  #  #  #  :          0 :                 SPDK_WARNLOG("but the device with vendor ID %u does not.\n", device->attr.vendor_id);
                   #  # ]
    2576                 :          0 :         }
    2577                 :            : 
    2578                 :            :         /**
    2579                 :            :          * The vendor ID is assigned by the IEEE and an ID of 0 implies Soft-RoCE.
    2580                 :            :          * The Soft-RoCE RXE driver does not currently support send with invalidate,
    2581                 :            :          * but incorrectly reports that it does. There are changes making their way
    2582                 :            :          * through the kernel now that will enable this feature. When they are merged,
    2583                 :            :          * we can conditionally enable this feature.
    2584                 :            :          *
    2585                 :            :          * TODO: enable this for versions of the kernel rxe driver that support it.
    2586                 :            :          */
    2587         [ -  + ]:         78 :         if (nvmf_rdma_is_rxe_device(device)) {
    2588   [ #  #  #  #  :          0 :                 device->attr.device_cap_flags &= ~(IBV_DEVICE_MEM_MGT_EXTENSIONS);
                   #  # ]
    2589                 :          0 :         }
    2590                 :            : #endif
    2591                 :            : 
    2592                 :            :         /* set up device context async ev fd as NON_BLOCKING */
    2593   [ #  #  #  #  :         78 :         flag = fcntl(device->context->async_fd, F_GETFL);
             #  #  #  # ]
    2594   [ #  #  #  #  :         78 :         rc = fcntl(device->context->async_fd, F_SETFL, flag | O_NONBLOCK);
             #  #  #  # ]
    2595         [ -  + ]:         78 :         if (rc < 0) {
    2596                 :          0 :                 SPDK_ERRLOG("Failed to set context async fd to NONBLOCK.\n");
    2597                 :          0 :                 free(device);
    2598                 :          0 :                 return rc;
    2599                 :            :         }
    2600                 :            : 
    2601   [ #  #  #  #  :         78 :         TAILQ_INSERT_TAIL(&rtransport->devices, device, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2602   [ -  +  -  +  :         78 :         SPDK_DEBUGLOG(rdma, "New device %p is added to RDMA trasport\n", device);
                   #  # ]
    2603                 :            : 
    2604         [ -  + ]:         78 :         if (g_nvmf_hooks.get_ibv_pd) {
    2605   [ #  #  #  #  :          0 :                 device->pd = g_nvmf_hooks.get_ibv_pd(NULL, device->context);
          #  #  #  #  #  
                #  #  # ]
    2606                 :          0 :         } else {
    2607   [ #  #  #  #  :         78 :                 device->pd = ibv_alloc_pd(device->context);
             #  #  #  # ]
    2608                 :            :         }
    2609                 :            : 
    2610   [ -  +  #  #  :         78 :         if (!device->pd) {
                   #  # ]
    2611                 :          0 :                 SPDK_ERRLOG("Unable to allocate protection domain.\n");
    2612                 :          0 :                 destroy_ib_device(rtransport, device);
    2613                 :          0 :                 return -ENOMEM;
    2614                 :            :         }
    2615                 :            : 
    2616   [ -  +  #  #  :         78 :         assert(device->map == NULL);
             #  #  #  # ]
    2617                 :            : 
    2618   [ #  #  #  #  :         78 :         device->map = spdk_rdma_create_mem_map(device->pd, &g_nvmf_hooks, SPDK_RDMA_MEMORY_MAP_ROLE_TARGET);
             #  #  #  # ]
    2619   [ -  +  #  #  :         78 :         if (!device->map) {
                   #  # ]
    2620                 :          0 :                 SPDK_ERRLOG("Unable to allocate memory map for listen address\n");
    2621                 :          0 :                 destroy_ib_device(rtransport, device);
    2622                 :          0 :                 return -ENOMEM;
    2623                 :            :         }
    2624                 :            : 
    2625   [ -  +  #  #  :         78 :         assert(device->map != NULL);
             #  #  #  # ]
    2626   [ -  +  #  #  :         78 :         assert(device->pd != NULL);
             #  #  #  # ]
    2627                 :            : 
    2628         [ +  - ]:         78 :         if (new_device) {
    2629         [ #  # ]:         78 :                 *new_device = device;
    2630                 :          0 :         }
    2631   [ #  #  #  # ]:         78 :         SPDK_NOTICELOG("Create IB device %s(%p/%p) succeed.\n", ibv_get_device_name(context->device),
    2632                 :            :                        device, context);
    2633                 :            : 
    2634                 :         78 :         return 0;
    2635                 :          0 : }
    2636                 :            : 
    2637                 :            : static void
    2638                 :         39 : free_poll_fds(struct spdk_nvmf_rdma_transport *rtransport)
    2639                 :            : {
    2640   [ +  -  #  #  :         39 :         if (rtransport->poll_fds) {
                   #  # ]
    2641   [ #  #  #  # ]:         39 :                 free(rtransport->poll_fds);
    2642   [ #  #  #  # ]:         39 :                 rtransport->poll_fds = NULL;
    2643                 :          0 :         }
    2644   [ #  #  #  # ]:         39 :         rtransport->npoll_fds = 0;
    2645                 :         39 : }
    2646                 :            : 
    2647                 :            : static int
    2648                 :         39 : generate_poll_fds(struct spdk_nvmf_rdma_transport *rtransport)
    2649                 :            : {
    2650                 :            :         /* Set up poll descriptor array to monitor events from RDMA and IB
    2651                 :            :          * in a single poll syscall
    2652                 :            :          */
    2653                 :         39 :         int device_count = 0;
    2654                 :         39 :         int i = 0;
    2655                 :          0 :         struct spdk_nvmf_rdma_device *device, *tmp;
    2656                 :            : 
    2657   [ +  +  #  #  :        117 :         TAILQ_FOREACH_SAFE(device, &rtransport->devices, link, tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2658         [ #  # ]:         78 :                 device_count++;
    2659                 :          0 :         }
    2660                 :            : 
    2661   [ #  #  #  #  :         39 :         rtransport->npoll_fds = device_count + 1;
                   #  # ]
    2662                 :            : 
    2663   [ #  #  #  #  :         39 :         rtransport->poll_fds = calloc(rtransport->npoll_fds, sizeof(struct pollfd));
             #  #  #  # ]
    2664   [ -  +  #  #  :         39 :         if (rtransport->poll_fds == NULL) {
                   #  # ]
    2665                 :          0 :                 SPDK_ERRLOG("poll_fds allocation failed\n");
    2666                 :          0 :                 return -ENOMEM;
    2667                 :            :         }
    2668                 :            : 
    2669   [ #  #  #  #  :         39 :         rtransport->poll_fds[i].fd = rtransport->event_channel->fd;
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2670   [ #  #  #  #  :         39 :         rtransport->poll_fds[i++].events = POLLIN;
          #  #  #  #  #  
                #  #  # ]
    2671                 :            : 
    2672   [ +  +  #  #  :        117 :         TAILQ_FOREACH_SAFE(device, &rtransport->devices, link, tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2673   [ #  #  #  #  :         78 :                 rtransport->poll_fds[i].fd = device->context->async_fd;
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    2674   [ #  #  #  #  :         78 :                 rtransport->poll_fds[i++].events = POLLIN;
          #  #  #  #  #  
                #  #  # ]
    2675                 :          0 :         }
    2676                 :            : 
    2677                 :         39 :         return 0;
    2678                 :          0 : }
    2679                 :            : 
    2680                 :            : static struct spdk_nvmf_transport *
    2681                 :         39 : nvmf_rdma_create(struct spdk_nvmf_transport_opts *opts)
    2682                 :            : {
    2683                 :          0 :         int rc;
    2684                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    2685                 :          0 :         struct spdk_nvmf_rdma_device    *device;
    2686                 :          0 :         struct ibv_context              **contexts;
    2687                 :          0 :         uint32_t                        i;
    2688                 :          0 :         int                             flag;
    2689                 :          0 :         uint32_t                        sge_count;
    2690                 :          0 :         uint32_t                        min_shared_buffers;
    2691                 :          0 :         uint32_t                        min_in_capsule_data_size;
    2692                 :         39 :         int                             max_device_sge = SPDK_NVMF_MAX_SGL_ENTRIES;
    2693                 :            : 
    2694                 :         39 :         rtransport = calloc(1, sizeof(*rtransport));
    2695         [ -  + ]:         39 :         if (!rtransport) {
    2696                 :          0 :                 return NULL;
    2697                 :            :         }
    2698                 :            : 
    2699   [ #  #  #  #  :         39 :         TAILQ_INIT(&rtransport->devices);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2700   [ #  #  #  #  :         39 :         TAILQ_INIT(&rtransport->ports);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2701   [ #  #  #  #  :         39 :         TAILQ_INIT(&rtransport->poll_groups);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2702   [ #  #  #  #  :         39 :         TAILQ_INIT(&rtransport->retry_ports);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2703                 :            : 
    2704   [ #  #  #  #  :         39 :         rtransport->transport.ops = &spdk_nvmf_transport_rdma;
                   #  # ]
    2705   [ #  #  #  #  :         39 :         rtransport->rdma_opts.num_cqe = DEFAULT_NVMF_RDMA_CQ_SIZE;
                   #  # ]
    2706   [ #  #  #  #  :         39 :         rtransport->rdma_opts.max_srq_depth = SPDK_NVMF_RDMA_DEFAULT_SRQ_DEPTH;
                   #  # ]
    2707   [ #  #  #  #  :         39 :         rtransport->rdma_opts.no_srq = SPDK_NVMF_RDMA_DEFAULT_NO_SRQ;
                   #  # ]
    2708   [ #  #  #  #  :         39 :         rtransport->rdma_opts.acceptor_backlog = SPDK_NVMF_RDMA_ACCEPTOR_BACKLOG;
                   #  # ]
    2709   [ #  #  #  #  :         39 :         rtransport->rdma_opts.no_wr_batching = SPDK_NVMF_RDMA_DEFAULT_NO_WR_BATCHING;
                   #  # ]
    2710   [ +  -  -  +  :         78 :         if (opts->transport_specific != NULL &&
             #  #  #  # ]
    2711   [ #  #  #  # ]:         39 :             spdk_json_decode_object_relaxed(opts->transport_specific, rdma_transport_opts_decoder,
    2712                 :            :                                             SPDK_COUNTOF(rdma_transport_opts_decoder),
    2713         [ #  # ]:         39 :                                             &rtransport->rdma_opts)) {
    2714                 :          0 :                 SPDK_ERRLOG("spdk_json_decode_object_relaxed failed\n");
    2715         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2716                 :          0 :                 return NULL;
    2717                 :            :         }
    2718                 :            : 
    2719   [ -  +  -  +  :         39 :         SPDK_INFOLOG(rdma, "*** RDMA Transport Init ***\n"
          -  -  -  -  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2720                 :            :                      "  Transport opts:  max_ioq_depth=%d, max_io_size=%d,\n"
    2721                 :            :                      "  max_io_qpairs_per_ctrlr=%d, io_unit_size=%d,\n"
    2722                 :            :                      "  in_capsule_data_size=%d, max_aq_depth=%d,\n"
    2723                 :            :                      "  num_shared_buffers=%d, num_cqe=%d, max_srq_depth=%d, no_srq=%d,"
    2724                 :            :                      "  acceptor_backlog=%d, no_wr_batching=%d abort_timeout_sec=%d\n",
    2725                 :            :                      opts->max_queue_depth,
    2726                 :            :                      opts->max_io_size,
    2727                 :            :                      opts->max_qpairs_per_ctrlr - 1,
    2728                 :            :                      opts->io_unit_size,
    2729                 :            :                      opts->in_capsule_data_size,
    2730                 :            :                      opts->max_aq_depth,
    2731                 :            :                      opts->num_shared_buffers,
    2732                 :            :                      rtransport->rdma_opts.num_cqe,
    2733                 :            :                      rtransport->rdma_opts.max_srq_depth,
    2734                 :            :                      rtransport->rdma_opts.no_srq,
    2735                 :            :                      rtransport->rdma_opts.acceptor_backlog,
    2736                 :            :                      rtransport->rdma_opts.no_wr_batching,
    2737                 :            :                      opts->abort_timeout_sec);
    2738                 :            : 
    2739                 :            :         /* I/O unit size cannot be larger than max I/O size */
    2740   [ -  +  #  #  :         39 :         if (opts->io_unit_size > opts->max_io_size) {
          #  #  #  #  #  
                      # ]
    2741   [ #  #  #  #  :          0 :                 opts->io_unit_size = opts->max_io_size;
             #  #  #  # ]
    2742                 :          0 :         }
    2743                 :            : 
    2744   [ -  +  #  #  :         39 :         if (rtransport->rdma_opts.acceptor_backlog <= 0) {
             #  #  #  # ]
    2745                 :          0 :                 SPDK_ERRLOG("The acceptor backlog cannot be less than 1, setting to the default value of (%d).\n",
    2746                 :            :                             SPDK_NVMF_RDMA_ACCEPTOR_BACKLOG);
    2747   [ #  #  #  #  :          0 :                 rtransport->rdma_opts.acceptor_backlog = SPDK_NVMF_RDMA_ACCEPTOR_BACKLOG;
                   #  # ]
    2748                 :          0 :         }
    2749                 :            : 
    2750   [ -  +  #  #  :         39 :         if (opts->num_shared_buffers < (SPDK_NVMF_MAX_SGL_ENTRIES * 2)) {
                   #  # ]
    2751   [ #  #  #  # ]:          0 :                 SPDK_ERRLOG("The number of shared data buffers (%d) is less than"
    2752                 :            :                             "the minimum number required to guarantee that forward progress can be made (%d)\n",
    2753                 :            :                             opts->num_shared_buffers, (SPDK_NVMF_MAX_SGL_ENTRIES * 2));
    2754         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2755                 :          0 :                 return NULL;
    2756                 :            :         }
    2757                 :            : 
    2758                 :            :         /* If buf_cache_size == UINT32_MAX, we will dynamically pick a cache size later that we know will fit. */
    2759   [ -  +  #  #  :         39 :         if (opts->buf_cache_size < UINT32_MAX) {
                   #  # ]
    2760   [ #  #  #  # ]:          0 :                 min_shared_buffers = spdk_env_get_core_count() * opts->buf_cache_size;
    2761   [ #  #  #  #  :          0 :                 if (min_shared_buffers > opts->num_shared_buffers) {
                   #  # ]
    2762   [ #  #  #  # ]:          0 :                         SPDK_ERRLOG("There are not enough buffers to satisfy"
    2763                 :            :                                     "per-poll group caches for each thread. (%" PRIu32 ")"
    2764                 :            :                                     "supplied. (%" PRIu32 ") required\n", opts->num_shared_buffers, min_shared_buffers);
    2765                 :          0 :                         SPDK_ERRLOG("Please specify a larger number of shared buffers\n");
    2766         [ #  # ]:          0 :                         nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2767                 :          0 :                         return NULL;
    2768                 :            :                 }
    2769                 :          0 :         }
    2770                 :            : 
    2771   [ -  +  #  #  :         39 :         sge_count = opts->max_io_size / opts->io_unit_size;
          #  #  #  #  #  
                      # ]
    2772         [ -  + ]:         39 :         if (sge_count > NVMF_DEFAULT_TX_SGE) {
    2773   [ #  #  #  # ]:          0 :                 SPDK_ERRLOG("Unsupported IO Unit size specified, %d bytes\n", opts->io_unit_size);
    2774         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2775                 :          0 :                 return NULL;
    2776                 :            :         }
    2777                 :            : 
    2778                 :         39 :         min_in_capsule_data_size = sizeof(struct spdk_nvme_sgl_descriptor) * SPDK_NVMF_MAX_SGL_ENTRIES;
    2779   [ +  +  #  #  :         39 :         if (opts->in_capsule_data_size < min_in_capsule_data_size) {
                   #  # ]
    2780                 :          4 :                 SPDK_WARNLOG("In capsule data size is set to %u, this is minimum size required to support msdbd=16\n",
    2781                 :            :                              min_in_capsule_data_size);
    2782   [ #  #  #  # ]:          4 :                 opts->in_capsule_data_size = min_in_capsule_data_size;
    2783                 :          0 :         }
    2784                 :            : 
    2785   [ #  #  #  # ]:         39 :         rtransport->event_channel = rdma_create_event_channel();
    2786   [ -  +  #  #  :         39 :         if (rtransport->event_channel == NULL) {
                   #  # ]
    2787         [ #  # ]:          0 :                 SPDK_ERRLOG("rdma_create_event_channel() failed, %s\n", spdk_strerror(errno));
    2788         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2789                 :          0 :                 return NULL;
    2790                 :            :         }
    2791                 :            : 
    2792   [ #  #  #  #  :         39 :         flag = fcntl(rtransport->event_channel->fd, F_GETFL);
             #  #  #  # ]
    2793   [ -  +  #  #  :         39 :         if (fcntl(rtransport->event_channel->fd, F_SETFL, flag | O_NONBLOCK) < 0) {
          #  #  #  #  #  
                      # ]
    2794   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("fcntl can't set nonblocking mode for socket, fd: %d (%s)\n",
          #  #  #  #  #  
                      # ]
    2795                 :            :                             rtransport->event_channel->fd, spdk_strerror(errno));
    2796         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2797                 :          0 :                 return NULL;
    2798                 :            :         }
    2799                 :            : 
    2800   [ #  #  #  # ]:         39 :         rtransport->data_wr_pool = spdk_mempool_create("spdk_nvmf_rdma_wr_data",
    2801   [ #  #  #  #  :         39 :                                    opts->max_queue_depth * SPDK_NVMF_MAX_SGL_ENTRIES,
                   #  # ]
    2802                 :            :                                    sizeof(struct spdk_nvmf_rdma_request_data),
    2803                 :            :                                    SPDK_MEMPOOL_DEFAULT_CACHE_SIZE,
    2804                 :            :                                    SPDK_ENV_SOCKET_ID_ANY);
    2805   [ -  +  #  #  :         39 :         if (!rtransport->data_wr_pool) {
                   #  # ]
    2806         [ #  # ]:          0 :                 if (spdk_mempool_lookup("spdk_nvmf_rdma_wr_data") != NULL) {
    2807                 :          0 :                         SPDK_ERRLOG("Unable to allocate work request pool for poll group: already exists\n");
    2808                 :          0 :                         SPDK_ERRLOG("Probably running in multiprocess environment, which is "
    2809                 :            :                                     "unsupported by the nvmf library\n");
    2810                 :          0 :                 } else {
    2811                 :          0 :                         SPDK_ERRLOG("Unable to allocate work request pool for poll group\n");
    2812                 :            :                 }
    2813         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2814                 :          0 :                 return NULL;
    2815                 :            :         }
    2816                 :            : 
    2817                 :         39 :         contexts = rdma_get_devices(NULL);
    2818         [ -  + ]:         39 :         if (contexts == NULL) {
    2819   [ #  #  #  # ]:          0 :                 SPDK_ERRLOG("rdma_get_devices() failed: %s (%d)\n", spdk_strerror(errno), errno);
    2820         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2821                 :          0 :                 return NULL;
    2822                 :            :         }
    2823                 :            : 
    2824                 :         39 :         i = 0;
    2825                 :         39 :         rc = 0;
    2826   [ +  +  #  #  :        117 :         while (contexts[i] != NULL) {
                   #  # ]
    2827   [ #  #  #  # ]:         78 :                 rc = create_ib_device(rtransport, contexts[i], &device);
    2828         [ -  + ]:         78 :                 if (rc < 0) {
    2829                 :          0 :                         break;
    2830                 :            :                 }
    2831                 :         78 :                 i++;
    2832   [ #  #  #  #  :         78 :                 max_device_sge = spdk_min(max_device_sge, device->attr.max_sge);
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2833   [ #  #  #  # ]:         78 :                 device->is_ready = true;
    2834                 :            :         }
    2835                 :         39 :         rdma_free_devices(contexts);
    2836                 :            : 
    2837   [ -  +  #  #  :         39 :         if (opts->io_unit_size * max_device_sge < opts->max_io_size) {
          #  #  #  #  #  
                      # ]
    2838                 :            :                 /* divide and round up. */
    2839   [ #  #  #  #  :          0 :                 opts->io_unit_size = (opts->max_io_size + max_device_sge - 1) / max_device_sge;
          #  #  #  #  #  
                      # ]
    2840                 :            : 
    2841                 :            :                 /* round up to the nearest 4k. */
    2842   [ #  #  #  #  :          0 :                 opts->io_unit_size = (opts->io_unit_size + NVMF_DATA_BUFFER_ALIGNMENT - 1) & ~NVMF_DATA_BUFFER_MASK;
          #  #  #  #  #  
                #  #  # ]
    2843                 :            : 
    2844   [ #  #  #  #  :          0 :                 opts->io_unit_size = spdk_max(opts->io_unit_size, SPDK_NVMF_RDMA_MIN_IO_BUFFER_SIZE);
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    2845   [ #  #  #  # ]:          0 :                 SPDK_NOTICELOG("Adjusting the io unit size to fit the device's maximum I/O size. New I/O unit size %u\n",
    2846                 :            :                                opts->io_unit_size);
    2847                 :          0 :         }
    2848                 :            : 
    2849         [ -  + ]:         39 :         if (rc < 0) {
    2850         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2851                 :          0 :                 return NULL;
    2852                 :            :         }
    2853                 :            : 
    2854                 :         39 :         rc = generate_poll_fds(rtransport);
    2855         [ -  + ]:         39 :         if (rc < 0) {
    2856         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2857                 :          0 :                 return NULL;
    2858                 :            :         }
    2859                 :            : 
    2860   [ #  #  #  #  :         39 :         rtransport->accept_poller = SPDK_POLLER_REGISTER(nvmf_rdma_accept, &rtransport->transport,
          #  #  #  #  #  
                      # ]
    2861                 :            :                                     opts->acceptor_poll_rate);
    2862   [ -  +  #  #  :         39 :         if (!rtransport->accept_poller) {
                   #  # ]
    2863         [ #  # ]:          0 :                 nvmf_rdma_destroy(&rtransport->transport, NULL, NULL);
    2864                 :          0 :                 return NULL;
    2865                 :            :         }
    2866                 :            : 
    2867         [ #  # ]:         39 :         return &rtransport->transport;
    2868                 :          0 : }
    2869                 :            : 
    2870                 :            : static void
    2871                 :         78 : destroy_ib_device(struct spdk_nvmf_rdma_transport *rtransport,
    2872                 :            :                   struct spdk_nvmf_rdma_device *device)
    2873                 :            : {
    2874   [ +  +  #  #  :         78 :         TAILQ_REMOVE(&rtransport->devices, device, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    2875         [ #  # ]:         78 :         spdk_rdma_free_mem_map(&device->map);
    2876   [ +  -  #  #  :         78 :         if (device->pd) {
                   #  # ]
    2877         [ +  - ]:         78 :                 if (!g_nvmf_hooks.get_ibv_pd) {
    2878   [ #  #  #  # ]:         78 :                         ibv_dealloc_pd(device->pd);
    2879                 :          0 :                 }
    2880                 :          0 :         }
    2881   [ -  +  -  +  :         78 :         SPDK_DEBUGLOG(rdma, "IB device [%p] is destroyed.\n", device);
                   #  # ]
    2882                 :         78 :         free(device);
    2883                 :         78 : }
    2884                 :            : 
    2885                 :            : static void
    2886                 :         44 : nvmf_rdma_dump_opts(struct spdk_nvmf_transport *transport, struct spdk_json_write_ctx *w)
    2887                 :            : {
    2888                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    2889   [ -  +  #  # ]:         44 :         assert(w != NULL);
    2890                 :            : 
    2891                 :         44 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    2892   [ #  #  #  #  :         44 :         spdk_json_write_named_uint32(w, "max_srq_depth", rtransport->rdma_opts.max_srq_depth);
                   #  # ]
    2893   [ -  +  #  #  :         44 :         spdk_json_write_named_bool(w, "no_srq", rtransport->rdma_opts.no_srq);
             #  #  #  # ]
    2894   [ -  +  -  +  :         44 :         if (rtransport->rdma_opts.no_srq == true) {
          #  #  #  #  #  
                      # ]
    2895   [ #  #  #  #  :          0 :                 spdk_json_write_named_int32(w, "num_cqe", rtransport->rdma_opts.num_cqe);
                   #  # ]
    2896                 :          0 :         }
    2897   [ #  #  #  #  :         44 :         spdk_json_write_named_int32(w, "acceptor_backlog", rtransport->rdma_opts.acceptor_backlog);
                   #  # ]
    2898   [ -  +  #  #  :         44 :         spdk_json_write_named_bool(w, "no_wr_batching", rtransport->rdma_opts.no_wr_batching);
             #  #  #  # ]
    2899                 :         44 : }
    2900                 :            : 
    2901                 :            : static int
    2902                 :         39 : nvmf_rdma_destroy(struct spdk_nvmf_transport *transport,
    2903                 :            :                   spdk_nvmf_transport_destroy_done_cb cb_fn, void *cb_arg)
    2904                 :            : {
    2905                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    2906                 :          0 :         struct spdk_nvmf_rdma_port      *port, *port_tmp;
    2907                 :          0 :         struct spdk_nvmf_rdma_device    *device, *device_tmp;
    2908                 :            : 
    2909                 :         39 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    2910                 :            : 
    2911   [ -  +  #  #  :         39 :         TAILQ_FOREACH_SAFE(port, &rtransport->retry_ports, link, port_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2912   [ #  #  #  #  :          0 :                 TAILQ_REMOVE(&rtransport->retry_ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    2913                 :          0 :                 free(port);
    2914                 :          0 :         }
    2915                 :            : 
    2916   [ -  +  #  #  :         39 :         TAILQ_FOREACH_SAFE(port, &rtransport->ports, link, port_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2917   [ #  #  #  #  :          0 :                 TAILQ_REMOVE(&rtransport->ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    2918   [ #  #  #  # ]:          0 :                 rdma_destroy_id(port->id);
    2919                 :          0 :                 free(port);
    2920                 :          0 :         }
    2921                 :            : 
    2922                 :         39 :         free_poll_fds(rtransport);
    2923                 :            : 
    2924   [ +  -  #  #  :         39 :         if (rtransport->event_channel != NULL) {
                   #  # ]
    2925   [ #  #  #  # ]:         39 :                 rdma_destroy_event_channel(rtransport->event_channel);
    2926                 :          0 :         }
    2927                 :            : 
    2928   [ +  +  #  #  :        117 :         TAILQ_FOREACH_SAFE(device, &rtransport->devices, link, device_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    2929                 :         78 :                 destroy_ib_device(rtransport, device);
    2930                 :          0 :         }
    2931                 :            : 
    2932   [ +  -  #  #  :         39 :         if (rtransport->data_wr_pool != NULL) {
                   #  # ]
    2933   [ #  #  #  #  :         39 :                 if (spdk_mempool_count(rtransport->data_wr_pool) !=
                   #  # ]
    2934   [ -  +  #  #  :         39 :                     (transport->opts.max_queue_depth * SPDK_NVMF_MAX_SGL_ENTRIES)) {
             #  #  #  # ]
    2935   [ #  #  #  #  :          0 :                         SPDK_ERRLOG("transport wr pool count is %zu but should be %u\n",
          #  #  #  #  #  
                #  #  # ]
    2936                 :            :                                     spdk_mempool_count(rtransport->data_wr_pool),
    2937                 :            :                                     transport->opts.max_queue_depth * SPDK_NVMF_MAX_SGL_ENTRIES);
    2938                 :          0 :                 }
    2939                 :          0 :         }
    2940                 :            : 
    2941   [ #  #  #  # ]:         39 :         spdk_mempool_free(rtransport->data_wr_pool);
    2942                 :            : 
    2943         [ #  # ]:         39 :         spdk_poller_unregister(&rtransport->accept_poller);
    2944                 :         39 :         free(rtransport);
    2945                 :            : 
    2946         [ +  - ]:         39 :         if (cb_fn) {
    2947   [ #  #  #  # ]:         39 :                 cb_fn(cb_arg);
    2948                 :          0 :         }
    2949                 :         39 :         return 0;
    2950                 :          0 : }
    2951                 :            : 
    2952                 :            : static int nvmf_rdma_trid_from_cm_id(struct rdma_cm_id *id,
    2953                 :            :                                      struct spdk_nvme_transport_id *trid,
    2954                 :            :                                      bool peer);
    2955                 :            : 
    2956                 :            : static bool nvmf_rdma_rescan_devices(struct spdk_nvmf_rdma_transport *rtransport);
    2957                 :            : 
    2958                 :            : static int
    2959                 :         58 : nvmf_rdma_listen(struct spdk_nvmf_transport *transport, const struct spdk_nvme_transport_id *trid,
    2960                 :            :                  struct spdk_nvmf_listen_opts *listen_opts)
    2961                 :            : {
    2962                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    2963                 :          0 :         struct spdk_nvmf_rdma_device    *device;
    2964                 :          0 :         struct spdk_nvmf_rdma_port      *port, *tmp_port;
    2965                 :          0 :         struct addrinfo                 *res;
    2966                 :          0 :         struct addrinfo                 hints;
    2967                 :          0 :         int                             family;
    2968                 :          0 :         int                             rc;
    2969                 :          0 :         long int                        port_val;
    2970                 :         58 :         bool                            is_retry = false;
    2971                 :            : 
    2972   [ -  +  #  #  :         58 :         if (!strlen(trid->trsvcid)) {
                   #  # ]
    2973                 :          0 :                 SPDK_ERRLOG("Service id is required\n");
    2974                 :          0 :                 return -EINVAL;
    2975                 :            :         }
    2976                 :            : 
    2977                 :         58 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    2978   [ -  +  #  #  :         58 :         assert(rtransport->event_channel != NULL);
             #  #  #  # ]
    2979                 :            : 
    2980                 :         58 :         port = calloc(1, sizeof(*port));
    2981         [ -  + ]:         58 :         if (!port) {
    2982                 :          0 :                 SPDK_ERRLOG("Port allocation failed\n");
    2983                 :          0 :                 return -ENOMEM;
    2984                 :            :         }
    2985                 :            : 
    2986   [ #  #  #  # ]:         58 :         port->trid = trid;
    2987                 :            : 
    2988   [ +  -  -  #  :         58 :         switch (trid->adrfam) {
                #  #  # ]
    2989                 :         58 :         case SPDK_NVMF_ADRFAM_IPV4:
    2990                 :         58 :                 family = AF_INET;
    2991                 :         58 :                 break;
    2992                 :          0 :         case SPDK_NVMF_ADRFAM_IPV6:
    2993                 :          0 :                 family = AF_INET6;
    2994                 :          0 :                 break;
    2995                 :          0 :         default:
    2996   [ #  #  #  # ]:          0 :                 SPDK_ERRLOG("Unhandled ADRFAM %d\n", trid->adrfam);
    2997                 :          0 :                 free(port);
    2998                 :          0 :                 return -EINVAL;
    2999                 :            :         }
    3000                 :            : 
    3001         [ -  + ]:         58 :         memset(&hints, 0, sizeof(hints));
    3002         [ #  # ]:         58 :         hints.ai_family = family;
    3003                 :         58 :         hints.ai_flags = AI_NUMERICSERV;
    3004         [ #  # ]:         58 :         hints.ai_socktype = SOCK_STREAM;
    3005         [ #  # ]:         58 :         hints.ai_protocol = 0;
    3006                 :            : 
    3007                 :            :         /* Range check the trsvcid. Fail in 3 cases:
    3008                 :            :          * < 0: means that spdk_strtol hit an error
    3009                 :            :          * 0: this results in ephemeral port which we don't want
    3010                 :            :          * > 65535: port too high
    3011                 :            :          */
    3012         [ #  # ]:         58 :         port_val = spdk_strtol(trid->trsvcid, 10);
    3013   [ +  -  -  + ]:         58 :         if (port_val <= 0 || port_val > 65535) {
    3014         [ #  # ]:          0 :                 SPDK_ERRLOG("invalid trsvcid %s\n", trid->trsvcid);
    3015                 :          0 :                 free(port);
    3016                 :          0 :                 return -EINVAL;
    3017                 :            :         }
    3018                 :            : 
    3019   [ #  #  #  # ]:         58 :         rc = getaddrinfo(trid->traddr, trid->trsvcid, &hints, &res);
    3020         [ -  + ]:         58 :         if (rc) {
    3021                 :          0 :                 SPDK_ERRLOG("getaddrinfo failed: %s (%d)\n", gai_strerror(rc), rc);
    3022                 :          0 :                 free(port);
    3023         [ #  # ]:          0 :                 return -(abs(rc));
    3024                 :            :         }
    3025                 :            : 
    3026   [ #  #  #  #  :         58 :         rc = rdma_create_id(rtransport->event_channel, &port->id, port, RDMA_PS_TCP);
                   #  # ]
    3027         [ -  + ]:         58 :         if (rc < 0) {
    3028                 :          0 :                 SPDK_ERRLOG("rdma_create_id() failed\n");
    3029                 :          0 :                 freeaddrinfo(res);
    3030                 :          0 :                 free(port);
    3031                 :          0 :                 return rc;
    3032                 :            :         }
    3033                 :            : 
    3034   [ #  #  #  #  :         58 :         rc = rdma_bind_addr(port->id, res->ai_addr);
             #  #  #  # ]
    3035                 :         58 :         freeaddrinfo(res);
    3036                 :            : 
    3037         [ -  + ]:         58 :         if (rc < 0) {
    3038   [ #  #  #  #  :          0 :                 TAILQ_FOREACH(tmp_port, &rtransport->retry_ports, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3039   [ #  #  #  #  :          0 :                         if (spdk_nvme_transport_id_compare(tmp_port->trid, trid) == 0) {
                   #  # ]
    3040                 :          0 :                                 is_retry = true;
    3041                 :          0 :                                 break;
    3042                 :            :                         }
    3043                 :          0 :                 }
    3044   [ #  #  #  # ]:          0 :                 if (!is_retry) {
    3045                 :          0 :                         SPDK_ERRLOG("rdma_bind_addr() failed\n");
    3046                 :          0 :                 }
    3047   [ #  #  #  # ]:          0 :                 rdma_destroy_id(port->id);
    3048                 :          0 :                 free(port);
    3049                 :          0 :                 return rc;
    3050                 :            :         }
    3051                 :            : 
    3052   [ -  +  #  #  :         58 :         if (!port->id->verbs) {
          #  #  #  #  #  
                      # ]
    3053                 :          0 :                 SPDK_ERRLOG("ibv_context is null\n");
    3054   [ #  #  #  # ]:          0 :                 rdma_destroy_id(port->id);
    3055                 :          0 :                 free(port);
    3056                 :          0 :                 return -1;
    3057                 :            :         }
    3058                 :            : 
    3059   [ #  #  #  #  :         58 :         rc = rdma_listen(port->id, rtransport->rdma_opts.acceptor_backlog);
          #  #  #  #  #  
                      # ]
    3060         [ -  + ]:         58 :         if (rc < 0) {
    3061                 :          0 :                 SPDK_ERRLOG("rdma_listen() failed\n");
    3062   [ #  #  #  # ]:          0 :                 rdma_destroy_id(port->id);
    3063                 :          0 :                 free(port);
    3064                 :          0 :                 return rc;
    3065                 :            :         }
    3066                 :            : 
    3067   [ +  -  #  #  :         59 :         TAILQ_FOREACH(device, &rtransport->devices, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3068   [ +  +  -  +  :         59 :                 if (device->context == port->id->verbs && device->is_ready) {
          +  -  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    3069   [ #  #  #  # ]:         58 :                         port->device = device;
    3070                 :         58 :                         break;
    3071                 :            :                 }
    3072                 :          0 :         }
    3073   [ -  +  #  #  :         58 :         if (!port->device) {
                   #  # ]
    3074   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("Accepted a connection with verbs %p, but unable to find a corresponding device.\n",
             #  #  #  # ]
    3075                 :            :                             port->id->verbs);
    3076   [ #  #  #  # ]:          0 :                 rdma_destroy_id(port->id);
    3077                 :          0 :                 free(port);
    3078                 :          0 :                 nvmf_rdma_rescan_devices(rtransport);
    3079                 :          0 :                 return -EINVAL;
    3080                 :            :         }
    3081                 :            : 
    3082   [ #  #  #  # ]:         58 :         SPDK_NOTICELOG("*** NVMe/RDMA Target Listening on %s port %s ***\n",
    3083                 :            :                        trid->traddr, trid->trsvcid);
    3084                 :            : 
    3085   [ #  #  #  #  :         58 :         TAILQ_INSERT_TAIL(&rtransport->ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3086                 :         58 :         return 0;
    3087                 :          0 : }
    3088                 :            : 
    3089                 :            : static void
    3090                 :         58 : nvmf_rdma_stop_listen_ex(struct spdk_nvmf_transport *transport,
    3091                 :            :                          const struct spdk_nvme_transport_id *trid, bool need_retry)
    3092                 :            : {
    3093                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    3094                 :          0 :         struct spdk_nvmf_rdma_port      *port, *tmp;
    3095                 :            : 
    3096                 :         58 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    3097                 :            : 
    3098   [ +  -  #  # ]:         58 :         if (!need_retry) {
    3099   [ -  +  #  #  :         58 :                 TAILQ_FOREACH_SAFE(port, &rtransport->retry_ports, link, tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3100   [ #  #  #  #  :          0 :                         if (spdk_nvme_transport_id_compare(port->trid, trid) == 0) {
                   #  # ]
    3101   [ #  #  #  #  :          0 :                                 TAILQ_REMOVE(&rtransport->retry_ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    3102                 :          0 :                                 free(port);
    3103                 :          0 :                         }
    3104                 :          0 :                 }
    3105                 :          0 :         }
    3106                 :            : 
    3107   [ +  -  #  #  :         64 :         TAILQ_FOREACH_SAFE(port, &rtransport->ports, link, tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3108   [ +  +  #  #  :         64 :                 if (spdk_nvme_transport_id_compare(port->trid, trid) == 0) {
                   #  # ]
    3109   [ -  +  -  +  :         58 :                         SPDK_DEBUGLOG(rdma, "Port %s:%s removed. need retry: %d\n",
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3110                 :            :                                       port->trid->traddr, port->trid->trsvcid, need_retry);
    3111   [ +  +  #  #  :         58 :                         TAILQ_REMOVE(&rtransport->ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    3112   [ #  #  #  # ]:         58 :                         rdma_destroy_id(port->id);
    3113   [ #  #  #  # ]:         58 :                         port->id = NULL;
    3114   [ #  #  #  # ]:         58 :                         port->device = NULL;
    3115   [ -  +  #  # ]:         58 :                         if (need_retry) {
    3116   [ #  #  #  #  :          0 :                                 TAILQ_INSERT_TAIL(&rtransport->retry_ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3117                 :          0 :                         } else {
    3118                 :         58 :                                 free(port);
    3119                 :            :                         }
    3120                 :         58 :                         break;
    3121                 :            :                 }
    3122                 :          0 :         }
    3123                 :         58 : }
    3124                 :            : 
    3125                 :            : static void
    3126                 :         58 : nvmf_rdma_stop_listen(struct spdk_nvmf_transport *transport,
    3127                 :            :                       const struct spdk_nvme_transport_id *trid)
    3128                 :            : {
    3129                 :         58 :         nvmf_rdma_stop_listen_ex(transport, trid, false);
    3130                 :         58 : }
    3131                 :            : 
    3132                 :            : static void _nvmf_rdma_register_poller_in_group(void *c);
    3133                 :            : static void _nvmf_rdma_remove_poller_in_group(void *c);
    3134                 :            : 
    3135                 :            : static bool
    3136                 :          0 : nvmf_rdma_all_pollers_management_done(void *c)
    3137                 :            : {
    3138                 :          0 :         struct poller_manage_ctx        *ctx = c;
    3139                 :          0 :         int                             counter;
    3140                 :            : 
    3141   [ #  #  #  # ]:          0 :         counter = __atomic_sub_fetch(ctx->inflight_op_counter, 1, __ATOMIC_SEQ_CST);
    3142   [ #  #  #  #  :          0 :         SPDK_DEBUGLOG(rdma, "nvmf_rdma_all_pollers_management_done called. counter: %d, poller: %p\n",
          #  #  #  #  #  
                      # ]
    3143                 :            :                       counter, ctx->rpoller);
    3144                 :            : 
    3145         [ #  # ]:          0 :         if (counter == 0) {
    3146   [ #  #  #  # ]:          0 :                 free((void *)ctx->inflight_op_counter);
    3147                 :          0 :         }
    3148                 :          0 :         free(ctx);
    3149                 :            : 
    3150                 :          0 :         return counter == 0;
    3151                 :          0 : }
    3152                 :            : 
    3153                 :            : static int
    3154                 :          0 : nvmf_rdma_manage_poller(struct spdk_nvmf_rdma_transport *rtransport,
    3155                 :            :                         struct spdk_nvmf_rdma_device *device, bool *has_inflight, bool is_add)
    3156                 :            : {
    3157                 :          0 :         struct spdk_nvmf_rdma_poll_group        *rgroup;
    3158                 :          0 :         struct spdk_nvmf_rdma_poller            *rpoller;
    3159                 :          0 :         struct spdk_nvmf_poll_group             *poll_group;
    3160                 :          0 :         struct poller_manage_ctx                *ctx;
    3161                 :          0 :         bool                                    found;
    3162                 :          0 :         int                                     *inflight_counter;
    3163                 :          0 :         spdk_msg_fn                             do_fn;
    3164                 :            : 
    3165         [ #  # ]:          0 :         *has_inflight = false;
    3166         [ #  # ]:          0 :         do_fn = is_add ? _nvmf_rdma_register_poller_in_group : _nvmf_rdma_remove_poller_in_group;
    3167                 :          0 :         inflight_counter = calloc(1, sizeof(int));
    3168         [ #  # ]:          0 :         if (!inflight_counter) {
    3169                 :          0 :                 SPDK_ERRLOG("Failed to allocate inflight counter when removing pollers\n");
    3170                 :          0 :                 return -ENOMEM;
    3171                 :            :         }
    3172                 :            : 
    3173   [ #  #  #  #  :          0 :         TAILQ_FOREACH(rgroup, &rtransport->poll_groups, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3174         [ #  # ]:          0 :                 (*inflight_counter)++;
    3175                 :          0 :         }
    3176                 :            : 
    3177   [ #  #  #  #  :          0 :         TAILQ_FOREACH(rgroup, &rtransport->poll_groups, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3178                 :          0 :                 found = false;
    3179   [ #  #  #  #  :          0 :                 TAILQ_FOREACH(rpoller, &rgroup->pollers, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3180   [ #  #  #  #  :          0 :                         if (rpoller->device == device) {
                   #  # ]
    3181                 :          0 :                                 found = true;
    3182                 :          0 :                                 break;
    3183                 :            :                         }
    3184                 :          0 :                 }
    3185   [ #  #  #  #  :          0 :                 if (found == is_add) {
                   #  # ]
    3186                 :          0 :                         __atomic_fetch_sub(inflight_counter, 1, __ATOMIC_SEQ_CST);
    3187                 :          0 :                         continue;
    3188                 :            :                 }
    3189                 :            : 
    3190                 :          0 :                 ctx = calloc(1, sizeof(struct poller_manage_ctx));
    3191         [ #  # ]:          0 :                 if (!ctx) {
    3192                 :          0 :                         SPDK_ERRLOG("Failed to allocate poller_manage_ctx when removing pollers\n");
    3193   [ #  #  #  #  :          0 :                         if (!*has_inflight) {
                   #  # ]
    3194                 :          0 :                                 free(inflight_counter);
    3195                 :          0 :                         }
    3196                 :          0 :                         return -ENOMEM;
    3197                 :            :                 }
    3198                 :            : 
    3199   [ #  #  #  # ]:          0 :                 ctx->rtransport = rtransport;
    3200   [ #  #  #  # ]:          0 :                 ctx->rgroup = rgroup;
    3201   [ #  #  #  # ]:          0 :                 ctx->rpoller = rpoller;
    3202   [ #  #  #  # ]:          0 :                 ctx->device = device;
    3203   [ #  #  #  # ]:          0 :                 ctx->thread = spdk_get_thread();
    3204   [ #  #  #  # ]:          0 :                 ctx->inflight_op_counter = inflight_counter;
    3205         [ #  # ]:          0 :                 *has_inflight = true;
    3206                 :            : 
    3207   [ #  #  #  #  :          0 :                 poll_group = rgroup->group.group;
                   #  # ]
    3208   [ #  #  #  #  :          0 :                 if (poll_group->thread != spdk_get_thread()) {
                   #  # ]
    3209   [ #  #  #  # ]:          0 :                         spdk_thread_send_msg(poll_group->thread, do_fn, ctx);
    3210                 :          0 :                 } else {
    3211   [ #  #  #  # ]:          0 :                         do_fn(ctx);
    3212                 :            :                 }
    3213                 :          0 :         }
    3214                 :            : 
    3215   [ #  #  #  #  :          0 :         if (!*has_inflight) {
                   #  # ]
    3216                 :          0 :                 free(inflight_counter);
    3217                 :          0 :         }
    3218                 :            : 
    3219                 :          0 :         return 0;
    3220                 :          0 : }
    3221                 :            : 
    3222                 :            : static void nvmf_rdma_handle_device_removal(struct spdk_nvmf_rdma_transport *rtransport,
    3223                 :            :                 struct spdk_nvmf_rdma_device *device);
    3224                 :            : 
    3225                 :            : static struct spdk_nvmf_rdma_device *
    3226                 :          0 : nvmf_rdma_find_ib_device(struct spdk_nvmf_rdma_transport *rtransport,
    3227                 :            :                          struct ibv_context *context)
    3228                 :            : {
    3229                 :          0 :         struct spdk_nvmf_rdma_device    *device, *tmp_device;
    3230                 :            : 
    3231   [ #  #  #  #  :          0 :         TAILQ_FOREACH_SAFE(device, &rtransport->devices, link, tmp_device) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3232   [ #  #  #  #  :          0 :                 if (device->need_destroy) {
             #  #  #  # ]
    3233                 :          0 :                         continue;
    3234                 :            :                 }
    3235                 :            : 
    3236   [ #  #  #  #  :          0 :                 if (strcmp(device->context->device->dev_name, context->device->dev_name) == 0) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    3237                 :          0 :                         return device;
    3238                 :            :                 }
    3239                 :          0 :         }
    3240                 :            : 
    3241                 :          0 :         return NULL;
    3242                 :          0 : }
    3243                 :            : 
    3244                 :            : static bool
    3245                 :          0 : nvmf_rdma_check_devices_context(struct spdk_nvmf_rdma_transport *rtransport,
    3246                 :            :                                 struct ibv_context *context)
    3247                 :            : {
    3248                 :          0 :         struct spdk_nvmf_rdma_device    *old_device, *new_device;
    3249                 :          0 :         int                             rc = 0;
    3250                 :          0 :         bool                            has_inflight;
    3251                 :            : 
    3252                 :          0 :         old_device = nvmf_rdma_find_ib_device(rtransport, context);
    3253                 :            : 
    3254         [ #  # ]:          0 :         if (old_device) {
    3255   [ #  #  #  #  :          0 :                 if (old_device->context != context && !old_device->need_destroy && old_device->is_ready) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    3256                 :            :                         /* context may not have time to be cleaned when rescan. exactly one context
    3257                 :            :                          * is valid for a device so this context must be invalid and just remove it. */
    3258   [ #  #  #  # ]:          0 :                         SPDK_WARNLOG("Device %p has a invalid context %p\n", old_device, old_device->context);
    3259   [ #  #  #  # ]:          0 :                         old_device->need_destroy = true;
    3260                 :          0 :                         nvmf_rdma_handle_device_removal(rtransport, old_device);
    3261                 :          0 :                 }
    3262                 :          0 :                 return false;
    3263                 :            :         }
    3264                 :            : 
    3265                 :          0 :         rc = create_ib_device(rtransport, context, &new_device);
    3266                 :            :         /* TODO: update transport opts. */
    3267         [ #  # ]:          0 :         if (rc < 0) {
    3268   [ #  #  #  # ]:          0 :                 SPDK_ERRLOG("Failed to create ib device for context: %s(%p)\n",
    3269                 :            :                             ibv_get_device_name(context->device), context);
    3270                 :          0 :                 return false;
    3271                 :            :         }
    3272                 :            : 
    3273                 :          0 :         rc = nvmf_rdma_manage_poller(rtransport, new_device, &has_inflight, true);
    3274         [ #  # ]:          0 :         if (rc < 0) {
    3275   [ #  #  #  # ]:          0 :                 SPDK_ERRLOG("Failed to add poller for device context: %s(%p)\n",
    3276                 :            :                             ibv_get_device_name(context->device), context);
    3277                 :          0 :                 return false;
    3278                 :            :         }
    3279                 :            : 
    3280   [ #  #  #  # ]:          0 :         if (has_inflight) {
    3281   [ #  #  #  # ]:          0 :                 new_device->is_ready = true;
    3282                 :          0 :         }
    3283                 :            : 
    3284                 :          0 :         return true;
    3285                 :          0 : }
    3286                 :            : 
    3287                 :            : static bool
    3288                 :          0 : nvmf_rdma_rescan_devices(struct spdk_nvmf_rdma_transport *rtransport)
    3289                 :            : {
    3290                 :          0 :         struct spdk_nvmf_rdma_device    *device;
    3291                 :          0 :         struct ibv_device               **ibv_device_list = NULL;
    3292                 :          0 :         struct ibv_context              **contexts = NULL;
    3293                 :          0 :         int                             i = 0;
    3294                 :          0 :         int                             num_dev = 0;
    3295                 :          0 :         bool                            new_create = false, has_new_device = false;
    3296                 :          0 :         struct ibv_context              *tmp_verbs = NULL;
    3297                 :            : 
    3298                 :            :         /* do not rescan when any device is destroying, or context may be freed when
    3299                 :            :          * regenerating the poll fds.
    3300                 :            :          */
    3301   [ #  #  #  #  :          0 :         TAILQ_FOREACH(device, &rtransport->devices, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3302   [ #  #  #  #  :          0 :                 if (device->need_destroy) {
             #  #  #  # ]
    3303                 :          0 :                         return false;
    3304                 :            :                 }
    3305                 :          0 :         }
    3306                 :            : 
    3307                 :          0 :         ibv_device_list = ibv_get_device_list(&num_dev);
    3308                 :            : 
    3309                 :            :         /* There is a bug in librdmacm. If verbs init failed in rdma_get_devices, it'll be
    3310                 :            :          * marked as dead verbs and never be init again. So we need to make sure the
    3311                 :            :          * verbs is available before we call rdma_get_devices. */
    3312         [ #  # ]:          0 :         if (num_dev >= 0) {
    3313   [ #  #  #  # ]:          0 :                 for (i = 0; i < num_dev; i++) {
    3314   [ #  #  #  # ]:          0 :                         tmp_verbs = ibv_open_device(ibv_device_list[i]);
    3315         [ #  # ]:          0 :                         if (!tmp_verbs) {
    3316   [ #  #  #  #  :          0 :                                 SPDK_WARNLOG("Failed to init ibv device %p, err %d. Skip rescan.\n", ibv_device_list[i], errno);
                   #  # ]
    3317                 :          0 :                                 break;
    3318                 :            :                         }
    3319         [ #  # ]:          0 :                         if (nvmf_rdma_find_ib_device(rtransport, tmp_verbs) == NULL) {
    3320   [ #  #  #  #  :          0 :                                 SPDK_DEBUGLOG(rdma, "Find new verbs init ibv device %p(%s).\n", ibv_device_list[i],
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3321                 :            :                                               tmp_verbs->device->dev_name);
    3322                 :          0 :                                 has_new_device = true;
    3323                 :          0 :                         }
    3324                 :          0 :                         ibv_close_device(tmp_verbs);
    3325                 :          0 :                 }
    3326                 :          0 :                 ibv_free_device_list(ibv_device_list);
    3327   [ #  #  #  #  :          0 :                 if (!tmp_verbs || !has_new_device) {
                   #  # ]
    3328                 :          0 :                         return false;
    3329                 :            :                 }
    3330                 :          0 :         }
    3331                 :            : 
    3332                 :          0 :         contexts = rdma_get_devices(NULL);
    3333                 :            : 
    3334   [ #  #  #  #  :          0 :         for (i = 0; contexts && contexts[i] != NULL; i++) {
          #  #  #  #  #  
                      # ]
    3335   [ #  #  #  #  :          0 :                 new_create |= nvmf_rdma_check_devices_context(rtransport, contexts[i]);
                   #  # ]
    3336                 :          0 :         }
    3337                 :            : 
    3338   [ #  #  #  # ]:          0 :         if (new_create) {
    3339                 :          0 :                 free_poll_fds(rtransport);
    3340                 :          0 :                 generate_poll_fds(rtransport);
    3341                 :          0 :         }
    3342                 :            : 
    3343         [ #  # ]:          0 :         if (contexts) {
    3344                 :          0 :                 rdma_free_devices(contexts);
    3345                 :          0 :         }
    3346                 :            : 
    3347         [ #  # ]:          0 :         return new_create;
    3348                 :          0 : }
    3349                 :            : 
    3350                 :            : static bool
    3351                 :      89062 : nvmf_rdma_retry_listen_port(struct spdk_nvmf_rdma_transport *rtransport)
    3352                 :            : {
    3353                 :          0 :         struct spdk_nvmf_rdma_port      *port, *tmp_port;
    3354                 :      89062 :         int                             rc = 0;
    3355                 :      89062 :         bool                            new_create = false;
    3356                 :            : 
    3357   [ +  -  #  #  :      89062 :         if (TAILQ_EMPTY(&rtransport->retry_ports)) {
             #  #  #  # ]
    3358                 :      89062 :                 return false;
    3359                 :            :         }
    3360                 :            : 
    3361                 :          0 :         new_create = nvmf_rdma_rescan_devices(rtransport);
    3362                 :            : 
    3363   [ #  #  #  #  :          0 :         TAILQ_FOREACH_SAFE(port, &rtransport->retry_ports, link, tmp_port) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3364   [ #  #  #  #  :          0 :                 rc = nvmf_rdma_listen(&rtransport->transport, port->trid, NULL);
                   #  # ]
    3365                 :            : 
    3366   [ #  #  #  #  :          0 :                 TAILQ_REMOVE(&rtransport->retry_ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    3367         [ #  # ]:          0 :                 if (rc) {
    3368   [ #  #  #  # ]:          0 :                         if (new_create) {
    3369   [ #  #  #  #  :          0 :                                 SPDK_ERRLOG("Found new IB device but port %s:%s is still failed(%d) to listen.\n",
          #  #  #  #  #  
                #  #  # ]
    3370                 :            :                                             port->trid->traddr, port->trid->trsvcid, rc);
    3371                 :          0 :                         }
    3372   [ #  #  #  #  :          0 :                         TAILQ_INSERT_TAIL(&rtransport->retry_ports, port, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3373                 :          0 :                         break;
    3374                 :            :                 } else {
    3375   [ #  #  #  #  :          0 :                         SPDK_NOTICELOG("Port %s:%s come back\n", port->trid->traddr, port->trid->trsvcid);
          #  #  #  #  #  
                #  #  # ]
    3376                 :          0 :                         free(port);
    3377                 :            :                 }
    3378                 :          0 :         }
    3379                 :            : 
    3380                 :          0 :         return true;
    3381                 :          0 : }
    3382                 :            : 
    3383                 :            : static void
    3384                 :   14297803 : nvmf_rdma_qpair_process_pending(struct spdk_nvmf_rdma_transport *rtransport,
    3385                 :            :                                 struct spdk_nvmf_rdma_qpair *rqpair, bool drain)
    3386                 :            : {
    3387                 :          0 :         struct spdk_nvmf_request *req, *tmp;
    3388                 :          0 :         struct spdk_nvmf_rdma_request   *rdma_req, *req_tmp;
    3389                 :          0 :         struct spdk_nvmf_rdma_resources *resources;
    3390                 :            : 
    3391                 :            :         /* First process requests which are waiting for response to be sent */
    3392   [ +  +  #  #  :   14297884 :         STAILQ_FOREACH_SAFE(rdma_req, &rqpair->pending_rdma_send_queue, state_link, req_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3393   [ +  +  +  -  :         95 :                 if (nvmf_rdma_request_process(rtransport, rdma_req) == false && drain == false) {
                   #  # ]
    3394                 :         14 :                         break;
    3395                 :            :                 }
    3396                 :          0 :         }
    3397                 :            : 
    3398                 :            :         /* We process I/O in the data transfer pending queue at the highest priority. */
    3399   [ +  +  #  #  :   14670735 :         STAILQ_FOREACH_SAFE(rdma_req, &rqpair->pending_rdma_read_queue, state_link, req_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3400   [ +  +  +  -  :    2038332 :                 if (nvmf_rdma_request_process(rtransport, rdma_req) == false && drain == false) {
                   #  # ]
    3401                 :    1665400 :                         break;
    3402                 :            :                 }
    3403                 :          0 :         }
    3404                 :            : 
    3405                 :            :         /* Then RDMA writes since reads have stronger restrictions than writes */
    3406   [ +  +  #  #  :   14303301 :         STAILQ_FOREACH_SAFE(rdma_req, &rqpair->pending_rdma_write_queue, state_link, req_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3407   [ +  +  +  -  :      16916 :                 if (nvmf_rdma_request_process(rtransport, rdma_req) == false && drain == false) {
                   #  # ]
    3408                 :      11418 :                         break;
    3409                 :            :                 }
    3410                 :          0 :         }
    3411                 :            : 
    3412                 :            :         /* Then we handle request waiting on memory buffers. */
    3413   [ +  +  #  #  :   14870291 :         STAILQ_FOREACH_SAFE(req, &rqpair->poller->group->group.pending_buf_queue, buf_link, tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3414                 :    1989130 :                 rdma_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_rdma_request, req);
    3415   [ +  +  +  -  :    1989130 :                 if (nvmf_rdma_request_process(rtransport, rdma_req) == false && drain == false) {
                   #  # ]
    3416                 :    1416642 :                         break;
    3417                 :            :                 }
    3418                 :          0 :         }
    3419                 :            : 
    3420   [ #  #  #  # ]:   14297803 :         resources = rqpair->resources;
    3421   [ +  -  +  +  :   21038734 :         while (!STAILQ_EMPTY(&resources->free_queue) && !STAILQ_EMPTY(&resources->incoming_queue)) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3422   [ #  #  #  #  :    6740931 :                 rdma_req = STAILQ_FIRST(&resources->free_queue);
                   #  # ]
    3423   [ -  +  #  #  :    6740931 :                 STAILQ_REMOVE_HEAD(&resources->free_queue, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3424   [ #  #  #  #  :    6740931 :                 rdma_req->recv = STAILQ_FIRST(&resources->incoming_queue);
          #  #  #  #  #  
                      # ]
    3425   [ +  -  #  #  :    6740931 :                 STAILQ_REMOVE_HEAD(&resources->incoming_queue, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3426                 :            : 
    3427   [ +  -  #  #  :    6740931 :                 if (rqpair->srq != NULL) {
                   #  # ]
    3428   [ #  #  #  #  :    6740931 :                         rdma_req->req.qpair = &rdma_req->recv->qpair->qpair;
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3429   [ #  #  #  #  :    6740931 :                         rdma_req->recv->qpair->qd++;
          #  #  #  #  #  
                      # ]
    3430                 :          0 :                 } else {
    3431         [ #  # ]:          0 :                         rqpair->qd++;
    3432                 :            :                 }
    3433                 :            : 
    3434   [ #  #  #  #  :    6740931 :                 rdma_req->receive_tsc = rdma_req->recv->receive_tsc;
          #  #  #  #  #  
                #  #  # ]
    3435   [ #  #  #  # ]:    6740931 :                 rdma_req->state = RDMA_REQUEST_STATE_NEW;
    3436         [ -  + ]:    6740931 :                 if (nvmf_rdma_request_process(rtransport, rdma_req) == false) {
    3437                 :          0 :                         break;
    3438                 :            :                 }
    3439                 :            :         }
    3440   [ -  +  -  -  :   14297803 :         if (!STAILQ_EMPTY(&resources->incoming_queue) && STAILQ_EMPTY(&resources->free_queue)) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3441   [ #  #  #  #  :          0 :                 rqpair->poller->stat.pending_free_request++;
             #  #  #  # ]
    3442                 :          0 :         }
    3443                 :   14297803 : }
    3444                 :            : 
    3445                 :            : static inline bool
    3446                 :       2087 : nvmf_rdma_can_ignore_last_wqe_reached(struct spdk_nvmf_rdma_device *device)
    3447                 :            : {
    3448                 :            :         /* iWARP transport and SoftRoCE driver don't support LAST_WQE_REACHED ibv async event */
    3449         [ +  - ]:       4174 :         return nvmf_rdma_is_rxe_device(device) ||
    3450   [ -  +  #  #  :       2087 :                device->context->device->transport_type == IBV_TRANSPORT_IWARP;
          #  #  #  #  #  
                #  #  # ]
    3451                 :            : }
    3452                 :            : 
    3453                 :            : static void
    3454                 :       4725 : nvmf_rdma_destroy_drained_qpair(struct spdk_nvmf_rdma_qpair *rqpair)
    3455                 :            : {
    3456   [ #  #  #  #  :       4725 :         struct spdk_nvmf_rdma_transport *rtransport = SPDK_CONTAINEROF(rqpair->qpair.transport,
                   #  # ]
    3457                 :            :                         struct spdk_nvmf_rdma_transport, transport);
    3458                 :            : 
    3459                 :       4725 :         nvmf_rdma_qpair_process_pending(rtransport, rqpair, true);
    3460                 :            : 
    3461                 :            :         /* nvmf_rdma_close_qpair is not called */
    3462   [ -  +  +  +  :       4725 :         if (!rqpair->to_close) {
             #  #  #  # ]
    3463                 :         48 :                 return;
    3464                 :            :         }
    3465                 :            : 
    3466                 :            :         /* device is already destroyed and we should force destroy this qpair. */
    3467   [ +  -  -  +  :       4677 :         if (rqpair->poller && rqpair->poller->need_destroy) {
          -  +  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    3468                 :          0 :                 nvmf_rdma_qpair_destroy(rqpair);
    3469                 :          0 :                 return;
    3470                 :            :         }
    3471                 :            : 
    3472                 :            :         /* In non SRQ path, we will reach rqpair->max_queue_depth. In SRQ path, we will get the last_wqe event. */
    3473   [ +  +  #  #  :       4677 :         if (rqpair->current_send_depth != 0) {
                   #  # ]
    3474                 :        550 :                 return;
    3475                 :            :         }
    3476                 :            : 
    3477   [ -  +  -  -  :       4127 :         if (rqpair->srq == NULL && rqpair->current_recv_depth != rqpair->max_queue_depth) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3478                 :          0 :                 return;
    3479                 :            :         }
    3480                 :            : 
    3481   [ +  -  -  +  :       4127 :         if (rqpair->srq != NULL && rqpair->last_wqe_reached == false &&
          +  +  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3482   [ +  -  #  # ]:       2087 :             !nvmf_rdma_can_ignore_last_wqe_reached(rqpair->device)) {
    3483                 :       2087 :                 return;
    3484                 :            :         }
    3485                 :            : 
    3486   [ -  +  #  #  :       2040 :         assert(rqpair->qpair.state == SPDK_NVMF_QPAIR_ERROR);
          #  #  #  #  #  
                      # ]
    3487                 :            : 
    3488                 :       2040 :         nvmf_rdma_qpair_destroy(rqpair);
    3489         [ #  # ]:          0 : }
    3490                 :            : 
    3491                 :            : static int
    3492                 :       2011 : nvmf_rdma_disconnect(struct rdma_cm_event *evt, bool *event_acked)
    3493                 :            : {
    3494                 :          0 :         struct spdk_nvmf_qpair          *qpair;
    3495                 :          0 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    3496                 :            : 
    3497   [ -  +  #  #  :       2011 :         if (evt->id == NULL) {
                   #  # ]
    3498                 :          0 :                 SPDK_ERRLOG("disconnect request: missing cm_id\n");
    3499                 :          0 :                 return -1;
    3500                 :            :         }
    3501                 :            : 
    3502   [ #  #  #  #  :       2011 :         qpair = evt->id->context;
             #  #  #  # ]
    3503         [ -  + ]:       2011 :         if (qpair == NULL) {
    3504                 :          0 :                 SPDK_ERRLOG("disconnect request: no active connection\n");
    3505                 :          0 :                 return -1;
    3506                 :            :         }
    3507                 :            : 
    3508                 :       2011 :         rdma_ack_cm_event(evt);
    3509         [ #  # ]:       2011 :         *event_acked = true;
    3510                 :            : 
    3511                 :       2011 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    3512                 :            : 
    3513   [ +  +  +  -  :       2011 :         spdk_trace_record(TRACE_RDMA_QP_DISCONNECT, 0, 0, (uintptr_t)rqpair);
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    3514                 :            : 
    3515         [ #  # ]:       2011 :         spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    3516                 :            : 
    3517                 :       2011 :         return 0;
    3518                 :          0 : }
    3519                 :            : 
    3520                 :            : #ifdef DEBUG
    3521                 :            : static const char *CM_EVENT_STR[] = {
    3522                 :            :         "RDMA_CM_EVENT_ADDR_RESOLVED",
    3523                 :            :         "RDMA_CM_EVENT_ADDR_ERROR",
    3524                 :            :         "RDMA_CM_EVENT_ROUTE_RESOLVED",
    3525                 :            :         "RDMA_CM_EVENT_ROUTE_ERROR",
    3526                 :            :         "RDMA_CM_EVENT_CONNECT_REQUEST",
    3527                 :            :         "RDMA_CM_EVENT_CONNECT_RESPONSE",
    3528                 :            :         "RDMA_CM_EVENT_CONNECT_ERROR",
    3529                 :            :         "RDMA_CM_EVENT_UNREACHABLE",
    3530                 :            :         "RDMA_CM_EVENT_REJECTED",
    3531                 :            :         "RDMA_CM_EVENT_ESTABLISHED",
    3532                 :            :         "RDMA_CM_EVENT_DISCONNECTED",
    3533                 :            :         "RDMA_CM_EVENT_DEVICE_REMOVAL",
    3534                 :            :         "RDMA_CM_EVENT_MULTICAST_JOIN",
    3535                 :            :         "RDMA_CM_EVENT_MULTICAST_ERROR",
    3536                 :            :         "RDMA_CM_EVENT_ADDR_CHANGE",
    3537                 :            :         "RDMA_CM_EVENT_TIMEWAIT_EXIT"
    3538                 :            : };
    3539                 :            : #endif /* DEBUG */
    3540                 :            : 
    3541                 :            : static void
    3542                 :          0 : nvmf_rdma_disconnect_qpairs_on_port(struct spdk_nvmf_rdma_transport *rtransport,
    3543                 :            :                                     struct spdk_nvmf_rdma_port *port)
    3544                 :            : {
    3545                 :          0 :         struct spdk_nvmf_rdma_poll_group        *rgroup;
    3546                 :          0 :         struct spdk_nvmf_rdma_poller            *rpoller;
    3547                 :          0 :         struct spdk_nvmf_rdma_qpair             *rqpair;
    3548                 :            : 
    3549   [ #  #  #  #  :          0 :         TAILQ_FOREACH(rgroup, &rtransport->poll_groups, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3550   [ #  #  #  #  :          0 :                 TAILQ_FOREACH(rpoller, &rgroup->pollers, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3551   [ #  #  #  # ]:          0 :                         RB_FOREACH(rqpair, qpairs_tree, &rpoller->qpairs) {
    3552   [ #  #  #  #  :          0 :                                 if (rqpair->listen_id == port->id) {
          #  #  #  #  #  
                      # ]
    3553         [ #  # ]:          0 :                                         spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    3554                 :          0 :                                 }
    3555                 :          0 :                         }
    3556                 :          0 :                 }
    3557                 :          0 :         }
    3558                 :          0 : }
    3559                 :            : 
    3560                 :            : static bool
    3561                 :          0 : nvmf_rdma_handle_cm_event_addr_change(struct spdk_nvmf_transport *transport,
    3562                 :            :                                       struct rdma_cm_event *event)
    3563                 :            : {
    3564                 :          0 :         const struct spdk_nvme_transport_id     *trid;
    3565                 :          0 :         struct spdk_nvmf_rdma_port              *port;
    3566                 :          0 :         struct spdk_nvmf_rdma_transport         *rtransport;
    3567                 :          0 :         bool                                    event_acked = false;
    3568                 :            : 
    3569                 :          0 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    3570   [ #  #  #  #  :          0 :         TAILQ_FOREACH(port, &rtransport->ports, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3571   [ #  #  #  #  :          0 :                 if (port->id == event->id) {
          #  #  #  #  #  
                      # ]
    3572   [ #  #  #  #  :          0 :                         SPDK_ERRLOG("ADDR_CHANGE: IP %s:%s migrated\n", port->trid->traddr, port->trid->trsvcid);
          #  #  #  #  #  
                #  #  # ]
    3573                 :          0 :                         rdma_ack_cm_event(event);
    3574                 :          0 :                         event_acked = true;
    3575   [ #  #  #  # ]:          0 :                         trid = port->trid;
    3576                 :          0 :                         break;
    3577                 :            :                 }
    3578                 :          0 :         }
    3579                 :            : 
    3580   [ #  #  #  # ]:          0 :         if (event_acked) {
    3581                 :          0 :                 nvmf_rdma_disconnect_qpairs_on_port(rtransport, port);
    3582                 :            : 
    3583                 :          0 :                 nvmf_rdma_stop_listen(transport, trid);
    3584                 :          0 :                 nvmf_rdma_listen(transport, trid, NULL);
    3585                 :          0 :         }
    3586                 :            : 
    3587         [ #  # ]:          0 :         return event_acked;
    3588                 :          0 : }
    3589                 :            : 
    3590                 :            : static void
    3591                 :          0 : nvmf_rdma_handle_device_removal(struct spdk_nvmf_rdma_transport *rtransport,
    3592                 :            :                                 struct spdk_nvmf_rdma_device *device)
    3593                 :            : {
    3594                 :          0 :         struct spdk_nvmf_rdma_port      *port, *port_tmp;
    3595                 :          0 :         int                             rc;
    3596                 :          0 :         bool                            has_inflight;
    3597                 :            : 
    3598                 :          0 :         rc = nvmf_rdma_manage_poller(rtransport, device, &has_inflight, false);
    3599         [ #  # ]:          0 :         if (rc) {
    3600                 :          0 :                 SPDK_ERRLOG("Failed to handle device removal, rc %d\n", rc);
    3601                 :          0 :                 return;
    3602                 :            :         }
    3603                 :            : 
    3604   [ #  #  #  # ]:          0 :         if (!has_inflight) {
    3605                 :            :                 /* no pollers, destroy the device */
    3606   [ #  #  #  # ]:          0 :                 device->ready_to_destroy = true;
    3607                 :          0 :                 spdk_thread_send_msg(spdk_get_thread(), _nvmf_rdma_remove_destroyed_device, rtransport);
    3608                 :          0 :         }
    3609                 :            : 
    3610   [ #  #  #  #  :          0 :         TAILQ_FOREACH_SAFE(port, &rtransport->ports, link, port_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3611   [ #  #  #  #  :          0 :                 if (port->device == device) {
                   #  # ]
    3612   [ #  #  #  #  :          0 :                         SPDK_NOTICELOG("Port %s:%s on device %s is being removed.\n",
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3613                 :            :                                        port->trid->traddr,
    3614                 :            :                                        port->trid->trsvcid,
    3615                 :            :                                        ibv_get_device_name(port->device->context->device));
    3616                 :            : 
    3617                 :            :                         /* keep NVMF listener and only destroy structures of the
    3618                 :            :                          * RDMA transport. when the device comes back we can retry listening
    3619                 :            :                          * and the application's workflow will not be interrupted.
    3620                 :            :                          */
    3621   [ #  #  #  #  :          0 :                         nvmf_rdma_stop_listen_ex(&rtransport->transport, port->trid, true);
                   #  # ]
    3622                 :          0 :                 }
    3623                 :          0 :         }
    3624         [ #  # ]:          0 : }
    3625                 :            : 
    3626                 :            : static void
    3627                 :          0 : nvmf_rdma_handle_cm_event_port_removal(struct spdk_nvmf_transport *transport,
    3628                 :            :                                        struct rdma_cm_event *event)
    3629                 :            : {
    3630                 :          0 :         struct spdk_nvmf_rdma_port              *port, *tmp_port;
    3631                 :          0 :         struct spdk_nvmf_rdma_transport         *rtransport;
    3632                 :            : 
    3633   [ #  #  #  #  :          0 :         port = event->id->context;
             #  #  #  # ]
    3634                 :          0 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    3635                 :            : 
    3636                 :          0 :         rdma_ack_cm_event(event);
    3637                 :            : 
    3638                 :            :         /* if device removal happens during ctrl qpair disconnecting, it's possible that we receive
    3639                 :            :          * an DEVICE_REMOVAL event on qpair but the id->qp is just NULL. So we should make sure that
    3640                 :            :          * we are handling a port event here.
    3641                 :            :          */
    3642   [ #  #  #  #  :          0 :         TAILQ_FOREACH(tmp_port, &rtransport->ports, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3643   [ #  #  #  #  :          0 :                 if (port == tmp_port && port->device && !port->device->need_destroy) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3644   [ #  #  #  #  :          0 :                         port->device->need_destroy = true;
             #  #  #  # ]
    3645   [ #  #  #  # ]:          0 :                         nvmf_rdma_handle_device_removal(rtransport, port->device);
    3646                 :          0 :                 }
    3647                 :          0 :         }
    3648                 :          0 : }
    3649                 :            : 
    3650                 :            : static void
    3651                 :       4614 : nvmf_process_cm_event(struct spdk_nvmf_transport *transport)
    3652                 :            : {
    3653                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    3654                 :          0 :         struct rdma_cm_event            *event;
    3655                 :          0 :         int                             rc;
    3656                 :          0 :         bool                            event_acked;
    3657                 :            : 
    3658                 :       4614 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    3659                 :            : 
    3660   [ -  +  #  #  :       4614 :         if (rtransport->event_channel == NULL) {
                   #  # ]
    3661                 :          0 :                 return;
    3662                 :            :         }
    3663                 :            : 
    3664                 :          0 :         while (1) {
    3665                 :      10705 :                 event_acked = false;
    3666   [ #  #  #  # ]:      10705 :                 rc = rdma_get_cm_event(rtransport->event_channel, &event);
    3667         [ +  + ]:      10705 :                 if (rc) {
    3668   [ -  +  -  -  :       4614 :                         if (errno != EAGAIN && errno != EWOULDBLOCK) {
             #  #  #  # ]
    3669         [ #  # ]:          0 :                                 SPDK_ERRLOG("Acceptor Event Error: %s\n", spdk_strerror(errno));
    3670                 :          0 :                         }
    3671                 :       4614 :                         break;
    3672                 :            :                 }
    3673                 :            : 
    3674   [ -  +  -  +  :       6091 :                 SPDK_DEBUGLOG(rdma, "Acceptor Event: %s\n", CM_EVENT_STR[event->event]);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3675                 :            : 
    3676   [ +  +  +  -  :       6091 :                 spdk_trace_record(TRACE_RDMA_CM_ASYNC_EVENT, 0, 0, 0, event->event);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    3677                 :            : 
    3678   [ -  +  -  -  :       6091 :                 switch (event->event) {
          -  +  +  -  -  
          -  -  -  #  #  
                   #  # ]
    3679                 :          0 :                 case RDMA_CM_EVENT_ADDR_RESOLVED:
    3680                 :            :                 case RDMA_CM_EVENT_ADDR_ERROR:
    3681                 :            :                 case RDMA_CM_EVENT_ROUTE_RESOLVED:
    3682                 :            :                 case RDMA_CM_EVENT_ROUTE_ERROR:
    3683                 :            :                         /* No action required. The target never attempts to resolve routes. */
    3684                 :          0 :                         break;
    3685                 :       2040 :                 case RDMA_CM_EVENT_CONNECT_REQUEST:
    3686                 :       2040 :                         rc = nvmf_rdma_connect(transport, event);
    3687         [ -  + ]:       2040 :                         if (rc < 0) {
    3688                 :          0 :                                 SPDK_ERRLOG("Unable to process connect event. rc: %d\n", rc);
    3689                 :          0 :                                 break;
    3690                 :            :                         }
    3691                 :       2040 :                         break;
    3692                 :          0 :                 case RDMA_CM_EVENT_CONNECT_RESPONSE:
    3693                 :            :                         /* The target never initiates a new connection. So this will not occur. */
    3694                 :          0 :                         break;
    3695                 :          0 :                 case RDMA_CM_EVENT_CONNECT_ERROR:
    3696                 :            :                         /* Can this happen? The docs say it can, but not sure what causes it. */
    3697                 :          0 :                         break;
    3698                 :          0 :                 case RDMA_CM_EVENT_UNREACHABLE:
    3699                 :            :                 case RDMA_CM_EVENT_REJECTED:
    3700                 :            :                         /* These only occur on the client side. */
    3701                 :          0 :                         break;
    3702                 :       2040 :                 case RDMA_CM_EVENT_ESTABLISHED:
    3703                 :            :                         /* TODO: Should we be waiting for this event anywhere? */
    3704                 :       2040 :                         break;
    3705                 :       2011 :                 case RDMA_CM_EVENT_DISCONNECTED:
    3706                 :       2011 :                         rc = nvmf_rdma_disconnect(event, &event_acked);
    3707         [ -  + ]:       2011 :                         if (rc < 0) {
    3708                 :          0 :                                 SPDK_ERRLOG("Unable to process disconnect event. rc: %d\n", rc);
    3709                 :          0 :                                 break;
    3710                 :            :                         }
    3711                 :       2011 :                         break;
    3712                 :          0 :                 case RDMA_CM_EVENT_DEVICE_REMOVAL:
    3713                 :            :                         /* In case of device removal, kernel IB part triggers IBV_EVENT_DEVICE_FATAL
    3714                 :            :                          * which triggers RDMA_CM_EVENT_DEVICE_REMOVAL on all cma_id’s.
    3715                 :            :                          * Once these events are sent to SPDK, we should release all IB resources and
    3716                 :            :                          * don't make attempts to call any ibv_query/modify/create functions. We can only call
    3717                 :            :                          * ibv_destroy* functions to release user space memory allocated by IB. All kernel
    3718                 :            :                          * resources are already cleaned. */
    3719   [ #  #  #  #  :          0 :                         if (event->id->qp) {
          #  #  #  #  #  
                      # ]
    3720                 :            :                                 /* If rdma_cm event has a valid `qp` pointer then the event refers to the
    3721                 :            :                                  * corresponding qpair. Otherwise the event refers to a listening device. */
    3722                 :          0 :                                 rc = nvmf_rdma_disconnect(event, &event_acked);
    3723         [ #  # ]:          0 :                                 if (rc < 0) {
    3724                 :          0 :                                         SPDK_ERRLOG("Unable to process disconnect event. rc: %d\n", rc);
    3725                 :          0 :                                         break;
    3726                 :            :                                 }
    3727                 :          0 :                         } else {
    3728                 :          0 :                                 nvmf_rdma_handle_cm_event_port_removal(transport, event);
    3729                 :          0 :                                 event_acked = true;
    3730                 :            :                         }
    3731                 :          0 :                         break;
    3732                 :          0 :                 case RDMA_CM_EVENT_MULTICAST_JOIN:
    3733                 :            :                 case RDMA_CM_EVENT_MULTICAST_ERROR:
    3734                 :            :                         /* Multicast is not used */
    3735                 :          0 :                         break;
    3736                 :          0 :                 case RDMA_CM_EVENT_ADDR_CHANGE:
    3737                 :          0 :                         event_acked = nvmf_rdma_handle_cm_event_addr_change(transport, event);
    3738                 :          0 :                         break;
    3739                 :          0 :                 case RDMA_CM_EVENT_TIMEWAIT_EXIT:
    3740                 :            :                         /* For now, do nothing. The target never re-uses queue pairs. */
    3741                 :          0 :                         break;
    3742                 :          0 :                 default:
    3743   [ #  #  #  # ]:          0 :                         SPDK_ERRLOG("Unexpected Acceptor Event [%d]\n", event->event);
    3744                 :          0 :                         break;
    3745                 :            :                 }
    3746   [ -  +  +  + ]:       6091 :                 if (!event_acked) {
    3747                 :       4080 :                         rdma_ack_cm_event(event);
    3748                 :          0 :                 }
    3749                 :            :         }
    3750         [ #  # ]:          0 : }
    3751                 :            : 
    3752                 :            : static void
    3753                 :       2040 : nvmf_rdma_handle_last_wqe_reached(struct spdk_nvmf_rdma_qpair *rqpair)
    3754                 :            : {
    3755   [ #  #  #  # ]:       2040 :         rqpair->last_wqe_reached = true;
    3756                 :       2040 :         nvmf_rdma_destroy_drained_qpair(rqpair);
    3757                 :       2040 : }
    3758                 :            : 
    3759                 :            : static void
    3760                 :       2040 : nvmf_rdma_qpair_process_ibv_event(void *ctx)
    3761                 :            : {
    3762                 :       2040 :         struct spdk_nvmf_rdma_ibv_event_ctx *event_ctx = ctx;
    3763                 :            : 
    3764   [ +  -  #  #  :       2040 :         if (event_ctx->rqpair) {
                   #  # ]
    3765   [ +  -  +  -  :       2040 :                 STAILQ_REMOVE(&event_ctx->rqpair->ibv_events, event_ctx, spdk_nvmf_rdma_ibv_event_ctx, link);
          -  -  -  -  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3766   [ +  -  #  #  :       2040 :                 if (event_ctx->cb_fn) {
                   #  # ]
    3767   [ #  #  #  #  :       2040 :                         event_ctx->cb_fn(event_ctx->rqpair);
          #  #  #  #  #  
                #  #  # ]
    3768                 :          0 :                 }
    3769                 :          0 :         }
    3770                 :       2040 :         free(event_ctx);
    3771                 :       2040 : }
    3772                 :            : 
    3773                 :            : static int
    3774                 :       2040 : nvmf_rdma_send_qpair_async_event(struct spdk_nvmf_rdma_qpair *rqpair,
    3775                 :            :                                  spdk_nvmf_rdma_qpair_ibv_event fn)
    3776                 :            : {
    3777                 :          0 :         struct spdk_nvmf_rdma_ibv_event_ctx *ctx;
    3778                 :       2040 :         struct spdk_thread *thr = NULL;
    3779                 :          0 :         int rc;
    3780                 :            : 
    3781   [ -  +  #  #  :       2040 :         if (rqpair->qpair.group) {
             #  #  #  # ]
    3782   [ #  #  #  #  :          0 :                 thr = rqpair->qpair.group->thread;
          #  #  #  #  #  
                      # ]
    3783   [ +  -  #  #  :       2040 :         } else if (rqpair->destruct_channel) {
                   #  # ]
    3784   [ #  #  #  # ]:       2040 :                 thr = spdk_io_channel_get_thread(rqpair->destruct_channel);
    3785                 :          0 :         }
    3786                 :            : 
    3787         [ -  + ]:       2040 :         if (!thr) {
    3788   [ #  #  #  #  :          0 :                 SPDK_DEBUGLOG(rdma, "rqpair %p has no thread\n", rqpair);
                   #  # ]
    3789                 :          0 :                 return -EINVAL;
    3790                 :            :         }
    3791                 :            : 
    3792                 :       2040 :         ctx = calloc(1, sizeof(*ctx));
    3793         [ -  + ]:       2040 :         if (!ctx) {
    3794                 :          0 :                 return -ENOMEM;
    3795                 :            :         }
    3796                 :            : 
    3797   [ #  #  #  # ]:       2040 :         ctx->rqpair = rqpair;
    3798   [ #  #  #  # ]:       2040 :         ctx->cb_fn = fn;
    3799   [ #  #  #  #  :       2040 :         STAILQ_INSERT_TAIL(&rqpair->ibv_events, ctx, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3800                 :            : 
    3801                 :       2040 :         rc = spdk_thread_send_msg(thr, nvmf_rdma_qpair_process_ibv_event, ctx);
    3802         [ -  + ]:       2040 :         if (rc) {
    3803   [ #  #  #  #  :          0 :                 STAILQ_REMOVE(&rqpair->ibv_events, ctx, spdk_nvmf_rdma_ibv_event_ctx, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    3804                 :          0 :                 free(ctx);
    3805                 :          0 :         }
    3806                 :            : 
    3807                 :       2040 :         return rc;
    3808                 :          0 : }
    3809                 :            : 
    3810                 :            : static int
    3811                 :       3086 : nvmf_process_ib_event(struct spdk_nvmf_rdma_device *device)
    3812                 :            : {
    3813                 :          0 :         int                             rc;
    3814                 :       3086 :         struct spdk_nvmf_rdma_qpair     *rqpair = NULL;
    3815                 :          0 :         struct ibv_async_event          event;
    3816                 :            : 
    3817   [ #  #  #  # ]:       3086 :         rc = ibv_get_async_event(device->context, &event);
    3818                 :            : 
    3819         [ +  + ]:       3086 :         if (rc) {
    3820                 :            :                 /* In non-blocking mode -1 means there are no events available */
    3821                 :       1046 :                 return rc;
    3822                 :            :         }
    3823                 :            : 
    3824   [ +  -  -  #  :       2040 :         switch (event.event_type) {
                   #  # ]
    3825                 :       2040 :         case IBV_EVENT_QP_FATAL:
    3826                 :            :         case IBV_EVENT_QP_LAST_WQE_REACHED:
    3827                 :            :         case IBV_EVENT_SQ_DRAINED:
    3828                 :            :         case IBV_EVENT_QP_REQ_ERR:
    3829                 :            :         case IBV_EVENT_QP_ACCESS_ERR:
    3830                 :            :         case IBV_EVENT_COMM_EST:
    3831                 :            :         case IBV_EVENT_PATH_MIG:
    3832                 :            :         case IBV_EVENT_PATH_MIG_ERR:
    3833   [ #  #  #  # ]:       2040 :                 rqpair = event.element.qp->qp_context;
    3834         [ -  + ]:       2040 :                 if (!rqpair) {
    3835                 :            :                         /* Any QP event for NVMe-RDMA initiator may be returned. */
    3836         [ #  # ]:          0 :                         SPDK_NOTICELOG("Async QP event for unknown QP: %s\n",
    3837                 :            :                                        ibv_event_type_str(event.event_type));
    3838                 :          0 :                         break;
    3839                 :            :                 }
    3840                 :            : 
    3841   [ -  +  -  -  :       2040 :                 switch (event.event_type) {
                -  #  # ]
    3842                 :          0 :                 case IBV_EVENT_QP_FATAL:
    3843                 :          0 :                         SPDK_ERRLOG("Fatal event received for rqpair %p\n", rqpair);
    3844   [ #  #  #  #  :          0 :                         spdk_trace_record(TRACE_RDMA_IBV_ASYNC_EVENT, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3845                 :            :                                           (uintptr_t)rqpair, event.event_type);
    3846                 :          0 :                         nvmf_rdma_update_ibv_state(rqpair);
    3847         [ #  # ]:          0 :                         spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    3848                 :          0 :                         break;
    3849                 :       2040 :                 case IBV_EVENT_QP_LAST_WQE_REACHED:
    3850                 :            :                         /* This event only occurs for shared receive queues. */
    3851   [ -  +  -  +  :       2040 :                         SPDK_DEBUGLOG(rdma, "Last WQE reached event received for rqpair %p\n", rqpair);
                   #  # ]
    3852                 :       2040 :                         rc = nvmf_rdma_send_qpair_async_event(rqpair, nvmf_rdma_handle_last_wqe_reached);
    3853         [ -  + ]:       2040 :                         if (rc) {
    3854                 :          0 :                                 SPDK_WARNLOG("Failed to send LAST_WQE_REACHED event. rqpair %p, err %d\n", rqpair, rc);
    3855   [ #  #  #  # ]:          0 :                                 rqpair->last_wqe_reached = true;
    3856                 :          0 :                         }
    3857                 :       2040 :                         break;
    3858                 :          0 :                 case IBV_EVENT_SQ_DRAINED:
    3859                 :            :                         /* This event occurs frequently in both error and non-error states.
    3860                 :            :                          * Check if the qpair is in an error state before sending a message. */
    3861   [ #  #  #  #  :          0 :                         SPDK_DEBUGLOG(rdma, "Last sq drained event received for rqpair %p\n", rqpair);
                   #  # ]
    3862   [ #  #  #  #  :          0 :                         spdk_trace_record(TRACE_RDMA_IBV_ASYNC_EVENT, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3863                 :            :                                           (uintptr_t)rqpair, event.event_type);
    3864         [ #  # ]:          0 :                         if (nvmf_rdma_update_ibv_state(rqpair) == IBV_QPS_ERR) {
    3865         [ #  # ]:          0 :                                 spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    3866                 :          0 :                         }
    3867                 :          0 :                         break;
    3868                 :          0 :                 case IBV_EVENT_QP_REQ_ERR:
    3869                 :            :                 case IBV_EVENT_QP_ACCESS_ERR:
    3870                 :            :                 case IBV_EVENT_COMM_EST:
    3871                 :            :                 case IBV_EVENT_PATH_MIG:
    3872                 :            :                 case IBV_EVENT_PATH_MIG_ERR:
    3873         [ #  # ]:          0 :                         SPDK_NOTICELOG("Async QP event: %s\n",
    3874                 :            :                                        ibv_event_type_str(event.event_type));
    3875   [ #  #  #  #  :          0 :                         spdk_trace_record(TRACE_RDMA_IBV_ASYNC_EVENT, 0, 0,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3876                 :            :                                           (uintptr_t)rqpair, event.event_type);
    3877                 :          0 :                         nvmf_rdma_update_ibv_state(rqpair);
    3878                 :          0 :                         break;
    3879                 :          0 :                 default:
    3880                 :          0 :                         break;
    3881                 :            :                 }
    3882                 :       2040 :                 break;
    3883                 :          0 :         case IBV_EVENT_DEVICE_FATAL:
    3884   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("Device Fatal event[%s] received on %s. device: %p\n",
          #  #  #  #  #  
                      # ]
    3885                 :            :                             ibv_event_type_str(event.event_type), ibv_get_device_name(device->context->device), device);
    3886   [ #  #  #  # ]:          0 :                 device->need_destroy = true;
    3887                 :          0 :                 break;
    3888                 :          0 :         case IBV_EVENT_CQ_ERR:
    3889                 :            :         case IBV_EVENT_PORT_ACTIVE:
    3890                 :            :         case IBV_EVENT_PORT_ERR:
    3891                 :            :         case IBV_EVENT_LID_CHANGE:
    3892                 :            :         case IBV_EVENT_PKEY_CHANGE:
    3893                 :            :         case IBV_EVENT_SM_CHANGE:
    3894                 :            :         case IBV_EVENT_SRQ_ERR:
    3895                 :            :         case IBV_EVENT_SRQ_LIMIT_REACHED:
    3896                 :            :         case IBV_EVENT_CLIENT_REREGISTER:
    3897                 :          0 :         case IBV_EVENT_GID_CHANGE:
    3898                 :            :         default:
    3899         [ #  # ]:          0 :                 SPDK_NOTICELOG("Async event: %s\n",
    3900                 :            :                                ibv_event_type_str(event.event_type));
    3901   [ #  #  #  #  :          0 :                 spdk_trace_record(TRACE_RDMA_IBV_ASYNC_EVENT, 0, 0, 0, event.event_type);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    3902                 :          0 :                 break;
    3903                 :            :         }
    3904                 :       2040 :         ibv_ack_async_event(&event);
    3905                 :            : 
    3906                 :       2040 :         return 0;
    3907                 :          0 : }
    3908                 :            : 
    3909                 :            : static void
    3910                 :       1046 : nvmf_process_ib_events(struct spdk_nvmf_rdma_device *device, uint32_t max_events)
    3911                 :            : {
    3912                 :       1046 :         int rc = 0;
    3913                 :       1046 :         uint32_t i = 0;
    3914                 :            : 
    3915         [ +  - ]:       3086 :         for (i = 0; i < max_events; i++) {
    3916                 :       3086 :                 rc = nvmf_process_ib_event(device);
    3917         [ +  + ]:       3086 :                 if (rc) {
    3918                 :       1046 :                         break;
    3919                 :            :                 }
    3920                 :          0 :         }
    3921                 :            : 
    3922   [ -  +  -  +  :       1046 :         SPDK_DEBUGLOG(rdma, "Device %s: %u events processed\n", device->context->device->name, i);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3923                 :       1046 : }
    3924                 :            : 
    3925                 :            : static int
    3926                 :      89062 : nvmf_rdma_accept(void *ctx)
    3927                 :            : {
    3928                 :      89062 :         int     nfds, i = 0;
    3929                 :      89062 :         struct spdk_nvmf_transport *transport = ctx;
    3930                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    3931                 :          0 :         struct spdk_nvmf_rdma_device *device, *tmp;
    3932                 :          0 :         uint32_t count;
    3933                 :          0 :         short revents;
    3934                 :          0 :         bool do_retry;
    3935                 :            : 
    3936                 :      89062 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    3937                 :      89062 :         do_retry = nvmf_rdma_retry_listen_port(rtransport);
    3938                 :            : 
    3939   [ #  #  #  #  :      89062 :         count = nfds = poll(rtransport->poll_fds, rtransport->npoll_fds, 0);
             #  #  #  # ]
    3940                 :            : 
    3941         [ +  + ]:      89062 :         if (nfds <= 0) {
    3942         [ #  # ]:      83990 :                 return do_retry ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
    3943                 :            :         }
    3944                 :            : 
    3945                 :            :         /* The first poll descriptor is RDMA CM event */
    3946   [ +  +  #  #  :       5072 :         if (rtransport->poll_fds[i++].revents & POLLIN) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    3947                 :       4614 :                 nvmf_process_cm_event(transport);
    3948         [ #  # ]:       4614 :                 nfds--;
    3949                 :          0 :         }
    3950                 :            : 
    3951         [ +  + ]:       5072 :         if (nfds == 0) {
    3952                 :       4026 :                 return SPDK_POLLER_BUSY;
    3953                 :            :         }
    3954                 :            : 
    3955                 :            :         /* Second and subsequent poll descriptors are IB async events */
    3956   [ +  +  #  #  :       3138 :         TAILQ_FOREACH_SAFE(device, &rtransport->devices, link, tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    3957   [ #  #  #  #  :       2092 :                 revents = rtransport->poll_fds[i++].revents;
          #  #  #  #  #  
                #  #  # ]
    3958         [ +  + ]:       2092 :                 if (revents & POLLIN) {
    3959   [ -  +  +  -  :       1046 :                         if (spdk_likely(!device->need_destroy)) {
             #  #  #  # ]
    3960                 :       1046 :                                 nvmf_process_ib_events(device, 32);
    3961   [ -  +  -  +  :       1046 :                                 if (spdk_unlikely(device->need_destroy)) {
             #  #  #  # ]
    3962                 :          0 :                                         nvmf_rdma_handle_device_removal(rtransport, device);
    3963                 :          0 :                                 }
    3964                 :          0 :                         }
    3965         [ #  # ]:       1046 :                         nfds--;
    3966   [ +  -  -  + ]:       1046 :                 } else if (revents & POLLNVAL || revents & POLLHUP) {
    3967                 :          0 :                         SPDK_ERRLOG("Receive unknown revent %x on device %p\n", (int)revents, device);
    3968         [ #  # ]:          0 :                         nfds--;
    3969                 :          0 :                 }
    3970                 :          0 :         }
    3971                 :            :         /* check all flagged fd's have been served */
    3972   [ -  +  #  # ]:       1046 :         assert(nfds == 0);
    3973                 :            : 
    3974                 :       1046 :         return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
    3975                 :          0 : }
    3976                 :            : 
    3977                 :            : static void
    3978                 :        325 : nvmf_rdma_cdata_init(struct spdk_nvmf_transport *transport, struct spdk_nvmf_subsystem *subsystem,
    3979                 :            :                      struct spdk_nvmf_ctrlr_data *cdata)
    3980                 :            : {
    3981   [ #  #  #  #  :        325 :         cdata->nvmf_specific.msdbd = NVMF_DEFAULT_MSDBD;
                   #  # ]
    3982                 :            : 
    3983                 :            :         /* Disable in-capsule data transfer for RDMA controller when dif_insert_or_strip is enabled
    3984                 :            :         since in-capsule data only works with NVME drives that support SGL memory layout */
    3985   [ -  +  -  +  :        325 :         if (transport->opts.dif_insert_or_strip) {
          #  #  #  #  #  
                      # ]
    3986   [ #  #  #  #  :          0 :                 cdata->nvmf_specific.ioccsz = sizeof(struct spdk_nvme_cmd) / 16;
                   #  # ]
    3987                 :          0 :         }
    3988                 :            : 
    3989   [ -  +  #  #  :        325 :         if (cdata->nvmf_specific.ioccsz > ((sizeof(struct spdk_nvme_cmd) + 0x1000) / 16)) {
             #  #  #  # ]
    3990                 :          0 :                 SPDK_WARNLOG("RDMA is configured to support up to 16 SGL entries while in capsule"
    3991                 :            :                              " data is greater than 4KiB.\n");
    3992                 :          0 :                 SPDK_WARNLOG("When used in conjunction with the NVMe-oF initiator from the Linux "
    3993                 :            :                              "kernel between versions 5.4 and 5.12 data corruption may occur for "
    3994                 :            :                              "writes that are not a multiple of 4KiB in size.\n");
    3995                 :          0 :         }
    3996                 :        325 : }
    3997                 :            : 
    3998                 :            : static void
    3999                 :         98 : nvmf_rdma_discover(struct spdk_nvmf_transport *transport,
    4000                 :            :                    struct spdk_nvme_transport_id *trid,
    4001                 :            :                    struct spdk_nvmf_discovery_log_page_entry *entry)
    4002                 :            : {
    4003   [ #  #  #  # ]:         98 :         entry->trtype = SPDK_NVMF_TRTYPE_RDMA;
    4004   [ #  #  #  #  :         98 :         entry->adrfam = trid->adrfam;
             #  #  #  # ]
    4005   [ #  #  #  # ]:         98 :         entry->treq.secure_channel = SPDK_NVMF_TREQ_SECURE_CHANNEL_NOT_REQUIRED;
    4006                 :            : 
    4007   [ #  #  #  # ]:         98 :         spdk_strcpy_pad(entry->trsvcid, trid->trsvcid, sizeof(entry->trsvcid), ' ');
    4008   [ #  #  #  # ]:         98 :         spdk_strcpy_pad(entry->traddr, trid->traddr, sizeof(entry->traddr), ' ');
    4009                 :            : 
    4010   [ #  #  #  #  :         98 :         entry->tsas.rdma.rdma_qptype = SPDK_NVMF_RDMA_QPTYPE_RELIABLE_CONNECTED;
             #  #  #  # ]
    4011   [ #  #  #  #  :         98 :         entry->tsas.rdma.rdma_prtype = SPDK_NVMF_RDMA_PRTYPE_NONE;
             #  #  #  # ]
    4012   [ #  #  #  #  :         98 :         entry->tsas.rdma.rdma_cms = SPDK_NVMF_RDMA_CMS_RDMA_CM;
             #  #  #  # ]
    4013                 :         98 : }
    4014                 :            : 
    4015                 :            : static int
    4016                 :        252 : nvmf_rdma_poller_create(struct spdk_nvmf_rdma_transport *rtransport,
    4017                 :            :                         struct spdk_nvmf_rdma_poll_group *rgroup, struct spdk_nvmf_rdma_device *device,
    4018                 :            :                         struct spdk_nvmf_rdma_poller **out_poller)
    4019                 :            : {
    4020                 :          0 :         struct spdk_nvmf_rdma_poller            *poller;
    4021                 :          0 :         struct spdk_rdma_srq_init_attr          srq_init_attr;
    4022                 :          0 :         struct spdk_nvmf_rdma_resource_opts     opts;
    4023                 :          0 :         int                                     num_cqe;
    4024                 :            : 
    4025                 :        252 :         poller = calloc(1, sizeof(*poller));
    4026         [ -  + ]:        252 :         if (!poller) {
    4027                 :          0 :                 SPDK_ERRLOG("Unable to allocate memory for new RDMA poller\n");
    4028                 :          0 :                 return -1;
    4029                 :            :         }
    4030                 :            : 
    4031   [ #  #  #  # ]:        252 :         poller->device = device;
    4032   [ #  #  #  # ]:        252 :         poller->group = rgroup;
    4033         [ #  # ]:        252 :         *out_poller = poller;
    4034                 :            : 
    4035   [ #  #  #  #  :        252 :         RB_INIT(&poller->qpairs);
                   #  # ]
    4036   [ #  #  #  #  :        252 :         STAILQ_INIT(&poller->qpairs_pending_send);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4037   [ #  #  #  #  :        252 :         STAILQ_INIT(&poller->qpairs_pending_recv);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4038                 :            : 
    4039   [ #  #  #  #  :        252 :         TAILQ_INSERT_TAIL(&rgroup->pollers, poller, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4040   [ -  +  -  +  :        252 :         SPDK_DEBUGLOG(rdma, "Create poller %p on device %p in poll group %p.\n", poller, device, rgroup);
                   #  # ]
    4041   [ -  +  +  -  :        252 :         if (rtransport->rdma_opts.no_srq == false && device->num_srq < device->attr.max_srq) {
          +  -  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    4042   [ -  +  #  #  :        252 :                 if ((int)rtransport->rdma_opts.max_srq_depth > device->attr.max_srq_wr) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    4043   [ #  #  #  #  :          0 :                         SPDK_WARNLOG("Requested SRQ depth %u, max supported by dev %s is %d\n",
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    4044                 :            :                                      rtransport->rdma_opts.max_srq_depth, device->context->device->name, device->attr.max_srq_wr);
    4045                 :          0 :                 }
    4046   [ #  #  #  #  :        252 :                 poller->max_srq_depth = spdk_min((int)rtransport->rdma_opts.max_srq_depth, device->attr.max_srq_wr);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    4047                 :            : 
    4048   [ #  #  #  # ]:        252 :                 device->num_srq++;
    4049         [ #  # ]:        252 :                 memset(&srq_init_attr, 0, sizeof(srq_init_attr));
    4050   [ #  #  #  # ]:        252 :                 srq_init_attr.pd = device->pd;
    4051   [ #  #  #  #  :        252 :                 srq_init_attr.stats = &poller->stat.qp_stats.recv;
             #  #  #  # ]
    4052   [ #  #  #  #  :        252 :                 srq_init_attr.srq_init_attr.attr.max_wr = poller->max_srq_depth;
          #  #  #  #  #  
                      # ]
    4053   [ #  #  #  #  :        252 :                 srq_init_attr.srq_init_attr.attr.max_sge = spdk_min(device->attr.max_sge, NVMF_DEFAULT_RX_SGE);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    4054   [ #  #  #  # ]:        252 :                 poller->srq = spdk_rdma_srq_create(&srq_init_attr);
    4055   [ -  +  #  #  :        252 :                 if (!poller->srq) {
                   #  # ]
    4056         [ #  # ]:          0 :                         SPDK_ERRLOG("Unable to create shared receive queue, errno %d\n", errno);
    4057                 :          0 :                         return -1;
    4058                 :            :                 }
    4059                 :            : 
    4060   [ #  #  #  #  :        252 :                 opts.qp = poller->srq;
                   #  # ]
    4061   [ #  #  #  #  :        252 :                 opts.map = device->map;
                   #  # ]
    4062                 :        252 :                 opts.qpair = NULL;
    4063         [ #  # ]:        252 :                 opts.shared = true;
    4064   [ #  #  #  #  :        252 :                 opts.max_queue_depth = poller->max_srq_depth;
                   #  # ]
    4065   [ #  #  #  #  :        252 :                 opts.in_capsule_data_size = rtransport->transport.opts.in_capsule_data_size;
          #  #  #  #  #  
                      # ]
    4066                 :            : 
    4067   [ #  #  #  # ]:        252 :                 poller->resources = nvmf_rdma_resources_create(&opts);
    4068   [ -  +  #  #  :        252 :                 if (!poller->resources) {
                   #  # ]
    4069                 :          0 :                         SPDK_ERRLOG("Unable to allocate resources for shared receive queue.\n");
    4070                 :          0 :                         return -1;
    4071                 :            :                 }
    4072                 :          0 :         }
    4073                 :            : 
    4074                 :            :         /*
    4075                 :            :          * When using an srq, we can limit the completion queue at startup.
    4076                 :            :          * The following formula represents the calculation:
    4077                 :            :          * num_cqe = num_recv + num_data_wr + num_send_wr.
    4078                 :            :          * where num_recv=num_data_wr=and num_send_wr=poller->max_srq_depth
    4079                 :            :          */
    4080   [ +  -  #  #  :        252 :         if (poller->srq) {
                   #  # ]
    4081   [ #  #  #  #  :        252 :                 num_cqe = poller->max_srq_depth * 3;
                   #  # ]
    4082                 :          0 :         } else {
    4083   [ #  #  #  #  :          0 :                 num_cqe = rtransport->rdma_opts.num_cqe;
                   #  # ]
    4084                 :            :         }
    4085                 :            : 
    4086   [ #  #  #  #  :        252 :         poller->cq = ibv_create_cq(device->context, num_cqe, poller, NULL, 0);
             #  #  #  # ]
    4087   [ -  +  #  #  :        252 :         if (!poller->cq) {
                   #  # ]
    4088                 :          0 :                 SPDK_ERRLOG("Unable to create completion queue\n");
    4089                 :          0 :                 return -1;
    4090                 :            :         }
    4091   [ #  #  #  # ]:        252 :         poller->num_cqe = num_cqe;
    4092                 :        252 :         return 0;
    4093                 :          0 : }
    4094                 :            : 
    4095                 :            : static void
    4096                 :          0 : _nvmf_rdma_register_poller_in_group(void *c)
    4097                 :            : {
    4098                 :          0 :         struct spdk_nvmf_rdma_poller    *poller;
    4099                 :          0 :         struct poller_manage_ctx        *ctx = c;
    4100                 :          0 :         struct spdk_nvmf_rdma_device    *device;
    4101                 :          0 :         int                             rc;
    4102                 :            : 
    4103   [ #  #  #  #  :          0 :         rc = nvmf_rdma_poller_create(ctx->rtransport, ctx->rgroup, ctx->device, &poller);
          #  #  #  #  #  
                #  #  # ]
    4104   [ #  #  #  # ]:          0 :         if (rc < 0 && poller) {
    4105                 :          0 :                 nvmf_rdma_poller_destroy(poller);
    4106                 :          0 :         }
    4107                 :            : 
    4108   [ #  #  #  # ]:          0 :         device = ctx->device;
    4109         [ #  # ]:          0 :         if (nvmf_rdma_all_pollers_management_done(ctx)) {
    4110   [ #  #  #  # ]:          0 :                 device->is_ready = true;
    4111                 :          0 :         }
    4112                 :          0 : }
    4113                 :            : 
    4114                 :            : static void nvmf_rdma_poll_group_destroy(struct spdk_nvmf_transport_poll_group *group);
    4115                 :            : 
    4116                 :            : static struct spdk_nvmf_transport_poll_group *
    4117                 :        156 : nvmf_rdma_poll_group_create(struct spdk_nvmf_transport *transport,
    4118                 :            :                             struct spdk_nvmf_poll_group *group)
    4119                 :            : {
    4120                 :          5 :         struct spdk_nvmf_rdma_transport         *rtransport;
    4121                 :          5 :         struct spdk_nvmf_rdma_poll_group        *rgroup;
    4122                 :         25 :         struct spdk_nvmf_rdma_poller            *poller;
    4123                 :          5 :         struct spdk_nvmf_rdma_device            *device;
    4124                 :          5 :         int                                     rc;
    4125                 :            : 
    4126                 :        156 :         rtransport = SPDK_CONTAINEROF(transport, struct spdk_nvmf_rdma_transport, transport);
    4127                 :            : 
    4128                 :        156 :         rgroup = calloc(1, sizeof(*rgroup));
    4129         [ +  + ]:        156 :         if (!rgroup) {
    4130                 :          0 :                 return NULL;
    4131                 :            :         }
    4132                 :            : 
    4133   [ +  -  +  -  :        156 :         TAILQ_INIT(&rgroup->pollers);
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
    4134                 :            : 
    4135   [ +  +  +  -  :        408 :         TAILQ_FOREACH(device, &rtransport->devices, link) {
          +  -  -  +  #  
             #  #  #  #  
                      # ]
    4136                 :        252 :                 rc = nvmf_rdma_poller_create(rtransport, rgroup, device, &poller);
    4137         [ -  + ]:        252 :                 if (rc < 0) {
    4138         [ #  # ]:          0 :                         nvmf_rdma_poll_group_destroy(&rgroup->group);
    4139                 :          0 :                         return NULL;
    4140                 :            :                 }
    4141                 :          0 :         }
    4142                 :            : 
    4143   [ +  -  +  -  :        156 :         TAILQ_INSERT_TAIL(&rtransport->poll_groups, rgroup, link);
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
    4144   [ +  +  +  -  :        156 :         if (rtransport->conn_sched.next_admin_pg == NULL) {
             +  -  +  + ]
    4145   [ -  +  -  +  :         45 :                 rtransport->conn_sched.next_admin_pg = rgroup;
                   -  + ]
    4146   [ -  +  -  +  :         45 :                 rtransport->conn_sched.next_io_pg = rgroup;
                   -  + ]
    4147                 :          1 :         }
    4148                 :            : 
    4149         [ +  - ]:        156 :         return &rgroup->group;
    4150                 :          5 : }
    4151                 :            : 
    4152                 :            : static uint32_t
    4153                 :       6044 : nvmf_poll_group_get_io_qpair_count(struct spdk_nvmf_poll_group *pg)
    4154                 :            : {
    4155                 :         12 :         uint32_t count;
    4156                 :            : 
    4157                 :            :         /* Just assume that unassociated qpairs will eventually be io
    4158                 :            :          * qpairs.  This is close enough for the use cases for this
    4159                 :            :          * function.
    4160                 :            :          */
    4161   [ +  +  +  - ]:       6044 :         pthread_mutex_lock(&pg->mutex);
    4162   [ +  -  +  -  :       6044 :         count = pg->stat.current_io_qpairs + pg->current_unassociated_qpairs;
          +  -  +  -  +  
                      - ]
    4163   [ +  +  +  - ]:       6044 :         pthread_mutex_unlock(&pg->mutex);
    4164                 :            : 
    4165                 :       6056 :         return count;
    4166                 :         12 : }
    4167                 :            : 
    4168                 :            : static struct spdk_nvmf_transport_poll_group *
    4169                 :       2124 : nvmf_rdma_get_optimal_poll_group(struct spdk_nvmf_qpair *qpair)
    4170                 :            : {
    4171                 :         14 :         struct spdk_nvmf_rdma_transport *rtransport;
    4172                 :         14 :         struct spdk_nvmf_rdma_poll_group **pg;
    4173                 :         14 :         struct spdk_nvmf_transport_poll_group *result;
    4174                 :         14 :         uint32_t count;
    4175                 :            : 
    4176   [ +  -  +  - ]:       2124 :         rtransport = SPDK_CONTAINEROF(qpair->transport, struct spdk_nvmf_rdma_transport, transport);
    4177                 :            : 
    4178   [ +  +  +  -  :       2124 :         if (TAILQ_EMPTY(&rtransport->poll_groups)) {
             +  -  +  + ]
    4179                 :         12 :                 return NULL;
    4180                 :            :         }
    4181                 :            : 
    4182   [ +  +  +  -  :       2112 :         if (qpair->qid == 0) {
                   +  + ]
    4183   [ +  -  +  - ]:        363 :                 pg = &rtransport->conn_sched.next_admin_pg;
    4184                 :          6 :         } else {
    4185                 :          6 :                 struct spdk_nvmf_rdma_poll_group *pg_min, *pg_start, *pg_current;
    4186                 :          6 :                 uint32_t min_value;
    4187                 :            : 
    4188   [ +  -  +  - ]:       1749 :                 pg = &rtransport->conn_sched.next_io_pg;
    4189         [ +  - ]:       1749 :                 pg_min = *pg;
    4190         [ +  - ]:       1749 :                 pg_start = *pg;
    4191         [ +  - ]:       1749 :                 pg_current = *pg;
    4192   [ +  -  +  -  :       1749 :                 min_value = nvmf_poll_group_get_io_qpair_count(pg_current->group.group);
                   +  - ]
    4193                 :            : 
    4194                 :          6 :                 while (1) {
    4195   [ +  -  +  -  :       4295 :                         count = nvmf_poll_group_get_io_qpair_count(pg_current->group.group);
                   +  - ]
    4196                 :            : 
    4197         [ +  + ]:       4295 :                         if (count < min_value) {
    4198                 :          0 :                                 min_value = count;
    4199                 :          0 :                                 pg_min = pg_current;
    4200                 :          0 :                         }
    4201                 :            : 
    4202   [ +  -  +  -  :       4295 :                         pg_current = TAILQ_NEXT(pg_current, link);
                   +  - ]
    4203         [ +  + ]:       4295 :                         if (pg_current == NULL) {
    4204   [ +  -  +  -  :       1142 :                                 pg_current = TAILQ_FIRST(&rtransport->poll_groups);
                   +  - ]
    4205                 :          2 :                         }
    4206                 :            : 
    4207   [ +  +  +  + ]:       4295 :                         if (pg_current == pg_start || min_value == 0) {
    4208                 :          6 :                                 break;
    4209                 :            :                         }
    4210                 :            :                 }
    4211         [ +  - ]:       1749 :                 *pg = pg_min;
    4212                 :          6 :         }
    4213                 :            : 
    4214   [ +  +  +  -  :       2112 :         assert(*pg != NULL);
                   #  # ]
    4215                 :            : 
    4216   [ +  -  +  - ]:       2112 :         result = &(*pg)->group;
    4217                 :            : 
    4218   [ +  -  +  -  :       2112 :         *pg = TAILQ_NEXT(*pg, link);
          +  -  +  -  +  
                      - ]
    4219   [ +  +  +  + ]:       2112 :         if (*pg == NULL) {
    4220   [ +  -  +  -  :        572 :                 *pg = TAILQ_FIRST(&rtransport->poll_groups);
             +  -  +  - ]
    4221                 :          4 :         }
    4222                 :            : 
    4223                 :       2112 :         return result;
    4224                 :         14 : }
    4225                 :            : 
    4226                 :            : static void
    4227                 :        252 : nvmf_rdma_poller_destroy(struct spdk_nvmf_rdma_poller *poller)
    4228                 :            : {
    4229                 :          0 :         struct spdk_nvmf_rdma_qpair     *qpair, *tmp_qpair;
    4230                 :          0 :         int                             rc;
    4231                 :            : 
    4232   [ +  +  #  #  :        252 :         TAILQ_REMOVE(&poller->group->pollers, poller, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4233   [ -  +  -  -  :        252 :         RB_FOREACH_SAFE(qpair, qpairs_tree, &poller->qpairs, tmp_qpair) {
                   #  # ]
    4234                 :          0 :                 nvmf_rdma_qpair_destroy(qpair);
    4235                 :          0 :         }
    4236                 :            : 
    4237   [ +  -  #  #  :        252 :         if (poller->srq) {
                   #  # ]
    4238   [ +  -  #  #  :        252 :                 if (poller->resources) {
                   #  # ]
    4239   [ #  #  #  # ]:        252 :                         nvmf_rdma_resources_destroy(poller->resources);
    4240                 :          0 :                 }
    4241   [ #  #  #  # ]:        252 :                 spdk_rdma_srq_destroy(poller->srq);
    4242   [ -  +  -  +  :        252 :                 SPDK_DEBUGLOG(rdma, "Destroyed RDMA shared queue %p\n", poller->srq);
          #  #  #  #  #  
                      # ]
    4243                 :          0 :         }
    4244                 :            : 
    4245   [ +  -  #  #  :        252 :         if (poller->cq) {
                   #  # ]
    4246   [ #  #  #  # ]:        252 :                 rc = ibv_destroy_cq(poller->cq);
    4247         [ -  + ]:        252 :                 if (rc != 0) {
    4248         [ #  # ]:          0 :                         SPDK_ERRLOG("Destroy cq return %d, error: %s\n", rc, strerror(errno));
    4249                 :          0 :                 }
    4250                 :          0 :         }
    4251                 :            : 
    4252   [ -  +  #  #  :        252 :         if (poller->destroy_cb) {
                   #  # ]
    4253   [ #  #  #  #  :          0 :                 poller->destroy_cb(poller->destroy_cb_ctx);
          #  #  #  #  #  
                #  #  # ]
    4254   [ #  #  #  # ]:          0 :                 poller->destroy_cb = NULL;
    4255                 :          0 :         }
    4256                 :            : 
    4257                 :        252 :         free(poller);
    4258                 :        252 : }
    4259                 :            : 
    4260                 :            : static void
    4261                 :        156 : nvmf_rdma_poll_group_destroy(struct spdk_nvmf_transport_poll_group *group)
    4262                 :            : {
    4263                 :          5 :         struct spdk_nvmf_rdma_poll_group        *rgroup, *next_rgroup;
    4264                 :          5 :         struct spdk_nvmf_rdma_poller            *poller, *tmp;
    4265                 :          5 :         struct spdk_nvmf_rdma_transport         *rtransport;
    4266                 :            : 
    4267                 :        156 :         rgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_rdma_poll_group, group);
    4268         [ +  + ]:        156 :         if (!rgroup) {
    4269                 :          0 :                 return;
    4270                 :            :         }
    4271                 :            : 
    4272   [ +  +  +  -  :        408 :         TAILQ_FOREACH_SAFE(poller, &rgroup->pollers, link, tmp) {
          +  -  +  -  #  
          #  #  #  #  #  
                   -  + ]
    4273                 :        252 :                 nvmf_rdma_poller_destroy(poller);
    4274                 :          0 :         }
    4275                 :            : 
    4276   [ +  +  +  -  :        156 :         if (rgroup->group.transport == NULL) {
             +  -  +  - ]
    4277                 :            :                 /* Transport can be NULL when nvmf_rdma_poll_group_create()
    4278                 :            :                  * calls this function directly in a failure path. */
    4279                 :          0 :                 free(rgroup);
    4280                 :          0 :                 return;
    4281                 :            :         }
    4282                 :            : 
    4283   [ +  -  +  -  :        156 :         rtransport = SPDK_CONTAINEROF(rgroup->group.transport, struct spdk_nvmf_rdma_transport, transport);
                   +  - ]
    4284                 :            : 
    4285   [ +  -  +  -  :        156 :         next_rgroup = TAILQ_NEXT(rgroup, link);
                   +  - ]
    4286   [ +  +  +  -  :        156 :         TAILQ_REMOVE(&rtransport->poll_groups, rgroup, link);
          +  -  +  +  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
                -  +  - ]
    4287         [ +  + ]:        156 :         if (next_rgroup == NULL) {
    4288   [ +  -  +  -  :         64 :                 next_rgroup = TAILQ_FIRST(&rtransport->poll_groups);
                   +  - ]
    4289                 :          1 :         }
    4290   [ +  +  +  -  :        156 :         if (rtransport->conn_sched.next_admin_pg == rgroup) {
             +  -  -  + ]
    4291   [ +  -  +  -  :         98 :                 rtransport->conn_sched.next_admin_pg = next_rgroup;
                   +  - ]
    4292                 :          5 :         }
    4293   [ +  +  +  -  :        156 :         if (rtransport->conn_sched.next_io_pg == rgroup) {
             +  -  -  + ]
    4294   [ +  -  +  -  :        106 :                 rtransport->conn_sched.next_io_pg = next_rgroup;
                   +  - ]
    4295                 :          5 :         }
    4296                 :            : 
    4297                 :        156 :         free(rgroup);
    4298         [ -  + ]:          5 : }
    4299                 :            : 
    4300                 :            : static void
    4301                 :          0 : nvmf_rdma_qpair_reject_connection(struct spdk_nvmf_rdma_qpair *rqpair)
    4302                 :            : {
    4303   [ #  #  #  #  :          0 :         if (rqpair->cm_id != NULL) {
                   #  # ]
    4304   [ #  #  #  # ]:          0 :                 nvmf_rdma_event_reject(rqpair->cm_id, SPDK_NVMF_RDMA_ERROR_NO_RESOURCES);
    4305                 :          0 :         }
    4306                 :          0 : }
    4307                 :            : 
    4308                 :            : static int
    4309                 :       2040 : nvmf_rdma_poll_group_add(struct spdk_nvmf_transport_poll_group *group,
    4310                 :            :                          struct spdk_nvmf_qpair *qpair)
    4311                 :            : {
    4312                 :          0 :         struct spdk_nvmf_rdma_poll_group        *rgroup;
    4313                 :          0 :         struct spdk_nvmf_rdma_qpair             *rqpair;
    4314                 :          0 :         struct spdk_nvmf_rdma_device            *device;
    4315                 :          0 :         struct spdk_nvmf_rdma_poller            *poller;
    4316                 :          0 :         int                                     rc;
    4317                 :            : 
    4318                 :       2040 :         rgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_rdma_poll_group, group);
    4319                 :       2040 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    4320                 :            : 
    4321   [ #  #  #  # ]:       2040 :         device = rqpair->device;
    4322                 :            : 
    4323   [ +  -  #  #  :       2042 :         TAILQ_FOREACH(poller, &rgroup->pollers, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    4324   [ +  +  #  #  :       2042 :                 if (poller->device == device) {
                   #  # ]
    4325                 :       2040 :                         break;
    4326                 :            :                 }
    4327                 :          0 :         }
    4328                 :            : 
    4329         [ -  + ]:       2040 :         if (!poller) {
    4330                 :          0 :                 SPDK_ERRLOG("No poller found for device.\n");
    4331                 :          0 :                 return -1;
    4332                 :            :         }
    4333                 :            : 
    4334   [ -  +  -  +  :       2040 :         if (poller->need_destroy) {
             #  #  #  # ]
    4335                 :          0 :                 SPDK_ERRLOG("Poller is destroying.\n");
    4336                 :          0 :                 return -1;
    4337                 :            :         }
    4338                 :            : 
    4339   [ #  #  #  # ]:       2040 :         rqpair->poller = poller;
    4340   [ #  #  #  #  :       2040 :         rqpair->srq = rqpair->poller->srq;
          #  #  #  #  #  
                #  #  # ]
    4341                 :            : 
    4342                 :       2040 :         rc = nvmf_rdma_qpair_initialize(qpair);
    4343         [ -  + ]:       2040 :         if (rc < 0) {
    4344                 :          0 :                 SPDK_ERRLOG("Failed to initialize nvmf_rdma_qpair with qpair=%p\n", qpair);
    4345   [ #  #  #  # ]:          0 :                 rqpair->poller = NULL;
    4346   [ #  #  #  # ]:          0 :                 rqpair->srq = NULL;
    4347                 :          0 :                 return -1;
    4348                 :            :         }
    4349                 :            : 
    4350         [ #  # ]:       2040 :         RB_INSERT(qpairs_tree, &poller->qpairs, rqpair);
    4351                 :            : 
    4352   [ #  #  #  # ]:       2040 :         rc = nvmf_rdma_event_accept(rqpair->cm_id, rqpair);
    4353         [ -  + ]:       2040 :         if (rc) {
    4354                 :            :                 /* Try to reject, but we probably can't */
    4355                 :          0 :                 nvmf_rdma_qpair_reject_connection(rqpair);
    4356                 :          0 :                 return -1;
    4357                 :            :         }
    4358                 :            : 
    4359                 :       2040 :         nvmf_rdma_update_ibv_state(rqpair);
    4360                 :            : 
    4361                 :       2040 :         return 0;
    4362                 :          0 : }
    4363                 :            : 
    4364                 :            : static int
    4365                 :       2040 : nvmf_rdma_poll_group_remove(struct spdk_nvmf_transport_poll_group *group,
    4366                 :            :                             struct spdk_nvmf_qpair *qpair)
    4367                 :            : {
    4368                 :          0 :         struct spdk_nvmf_rdma_qpair             *rqpair;
    4369                 :            : 
    4370                 :       2040 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    4371   [ -  +  #  #  :       2040 :         assert(group->transport->tgt != NULL);
          #  #  #  #  #  
                #  #  # ]
    4372                 :            : 
    4373   [ #  #  #  #  :       2040 :         rqpair->destruct_channel = spdk_get_io_channel(group->transport->tgt);
          #  #  #  #  #  
                #  #  # ]
    4374                 :            : 
    4375   [ -  +  #  #  :       2040 :         if (!rqpair->destruct_channel) {
                   #  # ]
    4376                 :          0 :                 SPDK_WARNLOG("failed to get io_channel, qpair %p\n", qpair);
    4377                 :          0 :                 return 0;
    4378                 :            :         }
    4379                 :            : 
    4380                 :            :         /* Sanity check that we get io_channel on the correct thread */
    4381   [ +  -  #  #  :       2040 :         if (qpair->group) {
                   #  # ]
    4382   [ -  +  #  #  :       2040 :                 assert(qpair->group->thread == spdk_io_channel_get_thread(rqpair->destruct_channel));
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4383                 :          0 :         }
    4384                 :            : 
    4385                 :       2040 :         return 0;
    4386                 :          0 : }
    4387                 :            : 
    4388                 :            : static int
    4389                 :        888 : nvmf_rdma_request_free(struct spdk_nvmf_request *req)
    4390                 :            : {
    4391                 :        888 :         struct spdk_nvmf_rdma_request   *rdma_req = SPDK_CONTAINEROF(req, struct spdk_nvmf_rdma_request, req);
    4392   [ #  #  #  #  :        888 :         struct spdk_nvmf_rdma_transport *rtransport = SPDK_CONTAINEROF(req->qpair->transport,
             #  #  #  # ]
    4393                 :            :                         struct spdk_nvmf_rdma_transport, transport);
    4394   [ #  #  #  #  :        888 :         struct spdk_nvmf_rdma_qpair *rqpair = SPDK_CONTAINEROF(rdma_req->req.qpair,
                   #  # ]
    4395                 :            :                                               struct spdk_nvmf_rdma_qpair, qpair);
    4396                 :            : 
    4397                 :            :         /*
    4398                 :            :          * AER requests are freed when a qpair is destroyed. The recv corresponding to that request
    4399                 :            :          * needs to be returned to the shared receive queue or the poll group will eventually be
    4400                 :            :          * starved of RECV structures.
    4401                 :            :          */
    4402   [ +  -  +  -  :        888 :         if (rqpair->srq && rdma_req->recv) {
          #  #  #  #  #  
                #  #  # ]
    4403                 :          0 :                 int rc;
    4404                 :          0 :                 struct ibv_recv_wr *bad_recv_wr;
    4405                 :            : 
    4406   [ #  #  #  #  :        888 :                 spdk_rdma_srq_queue_recv_wrs(rqpair->srq, &rdma_req->recv->wr);
          #  #  #  #  #  
                      # ]
    4407   [ #  #  #  # ]:        888 :                 rc = spdk_rdma_srq_flush_recv_wrs(rqpair->srq, &bad_recv_wr);
    4408         [ -  + ]:        888 :                 if (rc) {
    4409                 :          0 :                         SPDK_ERRLOG("Unable to re-post rx descriptor\n");
    4410                 :          0 :                 }
    4411                 :          0 :         }
    4412                 :            : 
    4413                 :        888 :         _nvmf_rdma_request_free(rdma_req, rtransport);
    4414                 :        888 :         return 0;
    4415                 :          0 : }
    4416                 :            : 
    4417                 :            : static int
    4418                 :    6739683 : nvmf_rdma_request_complete(struct spdk_nvmf_request *req)
    4419                 :            : {
    4420   [ #  #  #  #  :    6739683 :         struct spdk_nvmf_rdma_transport *rtransport = SPDK_CONTAINEROF(req->qpair->transport,
             #  #  #  # ]
    4421                 :            :                         struct spdk_nvmf_rdma_transport, transport);
    4422                 :    6739683 :         struct spdk_nvmf_rdma_request   *rdma_req = SPDK_CONTAINEROF(req,
    4423                 :            :                         struct spdk_nvmf_rdma_request, req);
    4424   [ #  #  #  #  :    6739683 :         struct spdk_nvmf_rdma_qpair     *rqpair = SPDK_CONTAINEROF(rdma_req->req.qpair,
                   #  # ]
    4425                 :            :                         struct spdk_nvmf_rdma_qpair, qpair);
    4426                 :            : 
    4427   [ +  -  #  #  :    6739683 :         if (rqpair->ibv_state != IBV_QPS_ERR) {
                   #  # ]
    4428                 :            :                 /* The connection is alive, so process the request as normal */
    4429   [ #  #  #  # ]:    6739683 :                 rdma_req->state = RDMA_REQUEST_STATE_EXECUTED;
    4430                 :          0 :         } else {
    4431                 :            :                 /* The connection is dead. Move the request directly to the completed state. */
    4432   [ #  #  #  # ]:          0 :                 rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    4433                 :            :         }
    4434                 :            : 
    4435                 :    6739683 :         nvmf_rdma_request_process(rtransport, rdma_req);
    4436                 :            : 
    4437                 :    6739683 :         return 0;
    4438                 :          0 : }
    4439                 :            : 
    4440                 :            : static void
    4441                 :       2040 : nvmf_rdma_close_qpair(struct spdk_nvmf_qpair *qpair,
    4442                 :            :                       spdk_nvmf_transport_qpair_fini_cb cb_fn, void *cb_arg)
    4443                 :            : {
    4444                 :       2040 :         struct spdk_nvmf_rdma_qpair *rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    4445                 :            : 
    4446   [ #  #  #  # ]:       2040 :         rqpair->to_close = true;
    4447                 :            : 
    4448                 :            :         /* This happens only when the qpair is disconnected before
    4449                 :            :          * it is added to the poll group. Since there is no poll group,
    4450                 :            :          * the RDMA qp has not been initialized yet and the RDMA CM
    4451                 :            :          * event has not yet been acknowledged, so we need to reject it.
    4452                 :            :          */
    4453   [ -  +  #  #  :       2040 :         if (rqpair->qpair.state == SPDK_NVMF_QPAIR_UNINITIALIZED) {
             #  #  #  # ]
    4454                 :          0 :                 nvmf_rdma_qpair_reject_connection(rqpair);
    4455                 :          0 :                 nvmf_rdma_qpair_destroy(rqpair);
    4456                 :          0 :                 return;
    4457                 :            :         }
    4458                 :            : 
    4459   [ +  -  #  #  :       2040 :         if (rqpair->rdma_qp) {
                   #  # ]
    4460   [ #  #  #  # ]:       2040 :                 spdk_rdma_qp_disconnect(rqpair->rdma_qp);
    4461                 :          0 :         }
    4462                 :            : 
    4463                 :       2040 :         nvmf_rdma_destroy_drained_qpair(rqpair);
    4464                 :            : 
    4465         [ +  - ]:       2040 :         if (cb_fn) {
    4466   [ #  #  #  # ]:       2040 :                 cb_fn(cb_arg);
    4467                 :          0 :         }
    4468         [ #  # ]:          0 : }
    4469                 :            : 
    4470                 :            : static struct spdk_nvmf_rdma_qpair *
    4471                 :    6740931 : get_rdma_qpair_from_wc(struct spdk_nvmf_rdma_poller *rpoller, struct ibv_wc *wc)
    4472                 :            : {
    4473                 :          0 :         struct spdk_nvmf_rdma_qpair find;
    4474                 :            : 
    4475   [ #  #  #  #  :    6740931 :         find.qp_num = wc->qp_num;
                   #  # ]
    4476                 :            : 
    4477         [ #  # ]:    6740931 :         return RB_FIND(qpairs_tree, &rpoller->qpairs, &find);
    4478                 :          0 : }
    4479                 :            : 
    4480                 :            : #ifdef DEBUG
    4481                 :            : static int
    4482                 :    6739460 : nvmf_rdma_req_is_completing(struct spdk_nvmf_rdma_request *rdma_req)
    4483                 :            : {
    4484   [ +  +  #  #  :   10156449 :         return rdma_req->state == RDMA_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST ||
                   #  # ]
    4485   [ +  -  #  # ]:    3416989 :                rdma_req->state == RDMA_REQUEST_STATE_COMPLETING;
    4486                 :            : }
    4487                 :            : #endif
    4488                 :            : 
    4489                 :            : static void
    4490                 :          0 : _poller_reset_failed_recvs(struct spdk_nvmf_rdma_poller *rpoller, struct ibv_recv_wr *bad_recv_wr,
    4491                 :            :                            int rc)
    4492                 :            : {
    4493                 :          0 :         struct spdk_nvmf_rdma_recv      *rdma_recv;
    4494                 :          0 :         struct spdk_nvmf_rdma_wr        *bad_rdma_wr;
    4495                 :            : 
    4496         [ #  # ]:          0 :         SPDK_ERRLOG("Failed to post a recv for the poller %p with errno %d\n", rpoller, -rc);
    4497         [ #  # ]:          0 :         while (bad_recv_wr != NULL) {
    4498   [ #  #  #  # ]:          0 :                 bad_rdma_wr = (struct spdk_nvmf_rdma_wr *)bad_recv_wr->wr_id;
    4499                 :          0 :                 rdma_recv = SPDK_CONTAINEROF(bad_rdma_wr, struct spdk_nvmf_rdma_recv, rdma_wr);
    4500                 :            : 
    4501   [ #  #  #  #  :          0 :                 rdma_recv->qpair->current_recv_depth++;
                   #  # ]
    4502   [ #  #  #  # ]:          0 :                 bad_recv_wr = bad_recv_wr->next;
    4503   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("Failed to post a recv for the qpair %p with errno %d\n", rdma_recv->qpair, -rc);
                   #  # ]
    4504   [ #  #  #  #  :          0 :                 spdk_nvmf_qpair_disconnect(&rdma_recv->qpair->qpair, NULL, NULL);
                   #  # ]
    4505                 :            :         }
    4506                 :          0 : }
    4507                 :            : 
    4508                 :            : static void
    4509                 :          0 : _qp_reset_failed_recvs(struct spdk_nvmf_rdma_qpair *rqpair, struct ibv_recv_wr *bad_recv_wr, int rc)
    4510                 :            : {
    4511         [ #  # ]:          0 :         SPDK_ERRLOG("Failed to post a recv for the qpair %p with errno %d\n", rqpair, -rc);
    4512         [ #  # ]:          0 :         while (bad_recv_wr != NULL) {
    4513   [ #  #  #  # ]:          0 :                 bad_recv_wr = bad_recv_wr->next;
    4514         [ #  # ]:          0 :                 rqpair->current_recv_depth++;
    4515                 :            :         }
    4516         [ #  # ]:          0 :         spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    4517                 :          0 : }
    4518                 :            : 
    4519                 :            : static void
    4520                 :  697545286 : _poller_submit_recvs(struct spdk_nvmf_rdma_transport *rtransport,
    4521                 :            :                      struct spdk_nvmf_rdma_poller *rpoller)
    4522                 :            : {
    4523                 :          0 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    4524                 :          0 :         struct ibv_recv_wr              *bad_recv_wr;
    4525                 :          0 :         int                             rc;
    4526                 :            : 
    4527   [ +  -  #  #  :  697545286 :         if (rpoller->srq) {
                   #  # ]
    4528   [ #  #  #  # ]:  697545286 :                 rc = spdk_rdma_srq_flush_recv_wrs(rpoller->srq, &bad_recv_wr);
    4529         [ -  + ]:  697545286 :                 if (rc) {
    4530                 :          0 :                         _poller_reset_failed_recvs(rpoller, bad_recv_wr, rc);
    4531                 :          0 :                 }
    4532                 :          0 :         } else {
    4533   [ #  #  #  #  :          0 :                 while (!STAILQ_EMPTY(&rpoller->qpairs_pending_recv)) {
             #  #  #  # ]
    4534   [ #  #  #  #  :          0 :                         rqpair = STAILQ_FIRST(&rpoller->qpairs_pending_recv);
                   #  # ]
    4535   [ #  #  #  # ]:          0 :                         rc = spdk_rdma_qp_flush_recv_wrs(rqpair->rdma_qp, &bad_recv_wr);
    4536         [ #  # ]:          0 :                         if (rc) {
    4537                 :          0 :                                 _qp_reset_failed_recvs(rqpair, bad_recv_wr, rc);
    4538                 :          0 :                         }
    4539   [ #  #  #  #  :          0 :                         STAILQ_REMOVE_HEAD(&rpoller->qpairs_pending_recv, recv_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    4540                 :            :                 }
    4541                 :            :         }
    4542                 :  697545286 : }
    4543                 :            : 
    4544                 :            : static void
    4545                 :          0 : _qp_reset_failed_sends(struct spdk_nvmf_rdma_transport *rtransport,
    4546                 :            :                        struct spdk_nvmf_rdma_qpair *rqpair, struct ibv_send_wr *bad_wr, int rc)
    4547                 :            : {
    4548                 :          0 :         struct spdk_nvmf_rdma_wr        *bad_rdma_wr;
    4549                 :          0 :         struct spdk_nvmf_rdma_request   *prev_rdma_req = NULL, *cur_rdma_req = NULL;
    4550                 :            : 
    4551         [ #  # ]:          0 :         SPDK_ERRLOG("Failed to post a send for the qpair %p with errno %d\n", rqpair, -rc);
    4552   [ #  #  #  #  :          0 :         for (; bad_wr != NULL; bad_wr = bad_wr->next) {
                   #  # ]
    4553   [ #  #  #  # ]:          0 :                 bad_rdma_wr = (struct spdk_nvmf_rdma_wr *)bad_wr->wr_id;
    4554   [ #  #  #  #  :          0 :                 assert(rqpair->current_send_depth > 0);
             #  #  #  # ]
    4555         [ #  # ]:          0 :                 rqpair->current_send_depth--;
    4556   [ #  #  #  #  :          0 :                 switch (bad_rdma_wr->type) {
                #  #  # ]
    4557                 :          0 :                 case RDMA_WR_TYPE_DATA:
    4558                 :          0 :                         cur_rdma_req = SPDK_CONTAINEROF(bad_rdma_wr, struct spdk_nvmf_rdma_request, data_wr);
    4559   [ #  #  #  #  :          0 :                         if (bad_wr->opcode == IBV_WR_RDMA_READ) {
                   #  # ]
    4560   [ #  #  #  #  :          0 :                                 assert(rqpair->current_read_depth > 0);
             #  #  #  # ]
    4561         [ #  # ]:          0 :                                 rqpair->current_read_depth--;
    4562                 :          0 :                         }
    4563                 :          0 :                         break;
    4564                 :          0 :                 case RDMA_WR_TYPE_SEND:
    4565                 :          0 :                         cur_rdma_req = SPDK_CONTAINEROF(bad_rdma_wr, struct spdk_nvmf_rdma_request, rsp_wr);
    4566                 :          0 :                         break;
    4567                 :          0 :                 default:
    4568                 :          0 :                         SPDK_ERRLOG("Found a RECV in the list of pending SEND requests for qpair %p\n", rqpair);
    4569                 :          0 :                         prev_rdma_req = cur_rdma_req;
    4570                 :          0 :                         continue;
    4571                 :            :                 }
    4572                 :            : 
    4573         [ #  # ]:          0 :                 if (prev_rdma_req == cur_rdma_req) {
    4574                 :            :                         /* this request was handled by an earlier wr. i.e. we were performing an nvme read. */
    4575                 :            :                         /* We only have to check against prev_wr since each requests wrs are contiguous in this list. */
    4576                 :          0 :                         continue;
    4577                 :            :                 }
    4578                 :            : 
    4579   [ #  #  #  #  :          0 :                 switch (cur_rdma_req->state) {
                #  #  # ]
    4580                 :          0 :                 case RDMA_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER:
    4581   [ #  #  #  #  :          0 :                         cur_rdma_req->req.rsp->nvme_cpl.status.sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    4582   [ #  #  #  #  :          0 :                         STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, cur_rdma_req, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    4583   [ #  #  #  # ]:          0 :                         cur_rdma_req->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    4584                 :          0 :                         break;
    4585                 :          0 :                 case RDMA_REQUEST_STATE_TRANSFERRING_CONTROLLER_TO_HOST:
    4586                 :            :                 case RDMA_REQUEST_STATE_COMPLETING:
    4587   [ #  #  #  # ]:          0 :                         cur_rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    4588                 :          0 :                         break;
    4589                 :          0 :                 default:
    4590   [ #  #  #  # ]:          0 :                         SPDK_ERRLOG("Found a request in a bad state %d when draining pending SEND requests for qpair %p\n",
    4591                 :            :                                     cur_rdma_req->state, rqpair);
    4592                 :          0 :                         continue;
    4593                 :            :                 }
    4594                 :            : 
    4595                 :          0 :                 nvmf_rdma_request_process(rtransport, cur_rdma_req);
    4596                 :          0 :                 prev_rdma_req = cur_rdma_req;
    4597                 :          0 :         }
    4598                 :            : 
    4599   [ #  #  #  #  :          0 :         if (rqpair->qpair.state == SPDK_NVMF_QPAIR_ACTIVE) {
             #  #  #  # ]
    4600                 :            :                 /* Disconnect the connection. */
    4601         [ #  # ]:          0 :                 spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    4602                 :          0 :         }
    4603                 :            : 
    4604                 :          0 : }
    4605                 :            : 
    4606                 :            : static void
    4607                 :  697545286 : _poller_submit_sends(struct spdk_nvmf_rdma_transport *rtransport,
    4608                 :            :                      struct spdk_nvmf_rdma_poller *rpoller)
    4609                 :            : {
    4610                 :          0 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    4611                 :  697545286 :         struct ibv_send_wr              *bad_wr = NULL;
    4612                 :          0 :         int                             rc;
    4613                 :            : 
    4614   [ +  +  #  #  : 1396163246 :         while (!STAILQ_EMPTY(&rpoller->qpairs_pending_send)) {
             #  #  #  # ]
    4615   [ #  #  #  #  :    1072674 :                 rqpair = STAILQ_FIRST(&rpoller->qpairs_pending_send);
                   #  # ]
    4616   [ #  #  #  # ]:    1072674 :                 rc = spdk_rdma_qp_flush_send_wrs(rqpair->rdma_qp, &bad_wr);
    4617                 :            : 
    4618                 :            :                 /* bad wr always points to the first wr that failed. */
    4619         [ -  + ]:    1072674 :                 if (rc) {
    4620                 :          0 :                         _qp_reset_failed_sends(rtransport, rqpair, bad_wr, rc);
    4621                 :          0 :                 }
    4622   [ +  +  #  #  :    1072674 :                 STAILQ_REMOVE_HEAD(&rpoller->qpairs_pending_send, send_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    4623                 :            :         }
    4624                 :  697545286 : }
    4625                 :            : 
    4626                 :            : static const char *
    4627                 :          0 : nvmf_rdma_wr_type_str(enum spdk_nvmf_rdma_wr_type wr_type)
    4628                 :            : {
    4629   [ #  #  #  # ]:          0 :         switch (wr_type) {
    4630                 :          0 :         case RDMA_WR_TYPE_RECV:
    4631                 :          0 :                 return "RECV";
    4632                 :          0 :         case RDMA_WR_TYPE_SEND:
    4633                 :          0 :                 return "SEND";
    4634                 :          0 :         case RDMA_WR_TYPE_DATA:
    4635                 :          0 :                 return "DATA";
    4636                 :          0 :         default:
    4637                 :          0 :                 SPDK_ERRLOG("Unknown WR type %d\n", wr_type);
    4638         [ #  # ]:          0 :                 SPDK_UNREACHABLE();
    4639                 :            :         }
    4640                 :          0 : }
    4641                 :            : 
    4642                 :            : static inline void
    4643                 :          0 : nvmf_rdma_log_wc_status(struct spdk_nvmf_rdma_qpair *rqpair, struct ibv_wc *wc)
    4644                 :            : {
    4645   [ #  #  #  #  :          0 :         enum spdk_nvmf_rdma_wr_type wr_type = ((struct spdk_nvmf_rdma_wr *)wc->wr_id)->type;
             #  #  #  # ]
    4646                 :            : 
    4647   [ #  #  #  #  :          0 :         if (wc->status == IBV_WC_WR_FLUSH_ERR) {
                   #  # ]
    4648                 :            :                 /* If qpair is in ERR state, we will receive completions for all posted and not completed
    4649                 :            :                  * Work Requests with IBV_WC_WR_FLUSH_ERR status. Don't log an error in that case */
    4650   [ #  #  #  #  :          0 :                 SPDK_DEBUGLOG(rdma,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4651                 :            :                               "Error on CQ %p, (qp state %d ibv_state %d) request 0x%lu, type %s, status: (%d): %s\n",
    4652                 :            :                               rqpair->poller->cq, rqpair->qpair.state, rqpair->ibv_state, wc->wr_id,
    4653                 :            :                               nvmf_rdma_wr_type_str(wr_type), wc->status, ibv_wc_status_str(wc->status));
    4654                 :          0 :         } else {
    4655   [ #  #  #  #  :          0 :                 SPDK_ERRLOG("Error on CQ %p, (qp state %d ibv_state %d) request 0x%lu, type %s, status: (%d): %s\n",
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    4656                 :            :                             rqpair->poller->cq, rqpair->qpair.state, rqpair->ibv_state, wc->wr_id,
    4657                 :            :                             nvmf_rdma_wr_type_str(wr_type), wc->status, ibv_wc_status_str(wc->status));
    4658                 :            :         }
    4659                 :          0 : }
    4660                 :            : 
    4661                 :            : static int
    4662                 :  697545286 : nvmf_rdma_poller_poll(struct spdk_nvmf_rdma_transport *rtransport,
    4663                 :            :                       struct spdk_nvmf_rdma_poller *rpoller)
    4664                 :            : {
    4665                 :          0 :         struct ibv_wc wc[32];
    4666                 :          0 :         struct spdk_nvmf_rdma_wr        *rdma_wr;
    4667                 :          0 :         struct spdk_nvmf_rdma_request   *rdma_req;
    4668                 :          0 :         struct spdk_nvmf_rdma_recv      *rdma_recv;
    4669                 :          0 :         struct spdk_nvmf_rdma_qpair     *rqpair, *tmp_rqpair;
    4670                 :          0 :         int reaped, i;
    4671                 :  697545286 :         int count = 0;
    4672                 :          0 :         int rc;
    4673                 :  697545286 :         bool error = false;
    4674                 :  697545286 :         uint64_t poll_tsc = spdk_get_ticks();
    4675                 :            : 
    4676   [ -  +  -  +  :  697545286 :         if (spdk_unlikely(rpoller->need_destroy)) {
             #  #  #  # ]
    4677                 :            :                 /* If qpair is closed before poller destroy, nvmf_rdma_destroy_drained_qpair may not
    4678                 :            :                  * be called because we cannot poll anything from cq. So we call that here to force
    4679                 :            :                  * destroy the qpair after to_close turning true.
    4680                 :            :                  */
    4681   [ #  #  #  #  :          0 :                 RB_FOREACH_SAFE(rqpair, qpairs_tree, &rpoller->qpairs, tmp_rqpair) {
                   #  # ]
    4682                 :          0 :                         nvmf_rdma_destroy_drained_qpair(rqpair);
    4683                 :          0 :                 }
    4684                 :          0 :                 return 0;
    4685                 :            :         }
    4686                 :            : 
    4687                 :            :         /* Poll for completing operations. */
    4688   [ #  #  #  # ]:  697545286 :         reaped = ibv_poll_cq(rpoller->cq, 32, wc);
    4689         [ -  + ]:  697545286 :         if (reaped < 0) {
    4690   [ #  #  #  # ]:          0 :                 SPDK_ERRLOG("Error polling CQ! (%d): %s\n",
    4691                 :            :                             errno, spdk_strerror(errno));
    4692                 :          0 :                 return -1;
    4693         [ +  + ]:  697545286 :         } else if (reaped == 0) {
    4694   [ #  #  #  # ]:  696148120 :                 rpoller->stat.idle_polls++;
    4695                 :          0 :         }
    4696                 :            : 
    4697   [ #  #  #  # ]:  697545286 :         rpoller->stat.polls++;
    4698   [ #  #  #  #  :  697545286 :         rpoller->stat.completions += reaped;
                   #  # ]
    4699                 :            : 
    4700   [ +  +  #  # ]:  711838364 :         for (i = 0; i < reaped; i++) {
    4701                 :            : 
    4702   [ #  #  #  #  :   14293078 :                 rdma_wr = (struct spdk_nvmf_rdma_wr *)wc[i].wr_id;
             #  #  #  # ]
    4703                 :            : 
    4704   [ +  +  +  -  :   14293078 :                 switch (rdma_wr->type) {
             #  #  #  # ]
    4705                 :    6739460 :                 case RDMA_WR_TYPE_SEND:
    4706                 :    6739460 :                         rdma_req = SPDK_CONTAINEROF(rdma_wr, struct spdk_nvmf_rdma_request, rsp_wr);
    4707   [ #  #  #  #  :    6739460 :                         rqpair = SPDK_CONTAINEROF(rdma_req->req.qpair, struct spdk_nvmf_rdma_qpair, qpair);
                   #  # ]
    4708                 :            : 
    4709   [ +  -  #  #  :    6739460 :                         if (!wc[i].status) {
          #  #  #  #  #  
                      # ]
    4710         [ #  # ]:    6739460 :                                 count++;
    4711   [ -  +  #  #  :    6739460 :                                 assert(wc[i].opcode == IBV_WC_SEND);
          #  #  #  #  #  
                #  #  # ]
    4712   [ -  +  #  # ]:    6739460 :                                 assert(nvmf_rdma_req_is_completing(rdma_req));
    4713                 :          0 :                         }
    4714                 :            : 
    4715   [ #  #  #  # ]:    6739460 :                         rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    4716                 :            :                         /* RDMA_WRITE operation completed. +1 since it was chained with rsp WR */
    4717   [ -  +  #  #  :    6739460 :                         assert(rqpair->current_send_depth >= (uint32_t)rdma_req->num_outstanding_data_wr + 1);
          #  #  #  #  #  
                #  #  # ]
    4718   [ #  #  #  #  :    6739460 :                         rqpair->current_send_depth -= rdma_req->num_outstanding_data_wr + 1;
          #  #  #  #  #  
                      # ]
    4719   [ #  #  #  # ]:    6739460 :                         rdma_req->num_outstanding_data_wr = 0;
    4720                 :            : 
    4721                 :    6739460 :                         nvmf_rdma_request_process(rtransport, rdma_req);
    4722                 :    6739460 :                         break;
    4723                 :    6740931 :                 case RDMA_WR_TYPE_RECV:
    4724                 :            :                         /* rdma_recv->qpair will be invalid if using an SRQ.  In that case we have to get the qpair from the wc. */
    4725                 :    6740931 :                         rdma_recv = SPDK_CONTAINEROF(rdma_wr, struct spdk_nvmf_rdma_recv, rdma_wr);
    4726   [ +  -  #  #  :    6740931 :                         if (rpoller->srq != NULL) {
                   #  # ]
    4727   [ #  #  #  #  :    6740931 :                                 rdma_recv->qpair = get_rdma_qpair_from_wc(rpoller, &wc[i]);
             #  #  #  # ]
    4728                 :            :                                 /* It is possible that there are still some completions for destroyed QP
    4729                 :            :                                  * associated with SRQ. We just ignore these late completions and re-post
    4730                 :            :                                  * receive WRs back to SRQ.
    4731                 :            :                                  */
    4732   [ -  +  #  #  :    6740931 :                                 if (spdk_unlikely(NULL == rdma_recv->qpair)) {
                   #  # ]
    4733                 :          0 :                                         struct ibv_recv_wr *bad_wr;
    4734                 :            : 
    4735   [ #  #  #  #  :          0 :                                         rdma_recv->wr.next = NULL;
                   #  # ]
    4736   [ #  #  #  #  :          0 :                                         spdk_rdma_srq_queue_recv_wrs(rpoller->srq, &rdma_recv->wr);
                   #  # ]
    4737   [ #  #  #  # ]:          0 :                                         rc = spdk_rdma_srq_flush_recv_wrs(rpoller->srq, &bad_wr);
    4738         [ #  # ]:          0 :                                         if (rc) {
    4739                 :          0 :                                                 SPDK_ERRLOG("Failed to re-post recv WR to SRQ, err %d\n", rc);
    4740                 :          0 :                                         }
    4741                 :          0 :                                         continue;
    4742                 :          0 :                                 }
    4743                 :          0 :                         }
    4744   [ #  #  #  # ]:    6740931 :                         rqpair = rdma_recv->qpair;
    4745                 :            : 
    4746   [ -  +  #  # ]:    6740931 :                         assert(rqpair != NULL);
    4747   [ +  -  #  #  :    6740931 :                         if (!wc[i].status) {
          #  #  #  #  #  
                      # ]
    4748   [ -  +  #  #  :    6740931 :                                 assert(wc[i].opcode == IBV_WC_RECV);
          #  #  #  #  #  
                #  #  # ]
    4749   [ -  +  #  #  :    6740931 :                                 if (rqpair->current_recv_depth >= rqpair->max_queue_depth) {
          #  #  #  #  #  
                      # ]
    4750         [ #  # ]:          0 :                                         spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    4751                 :          0 :                                         break;
    4752                 :            :                                 }
    4753                 :          0 :                         }
    4754                 :            : 
    4755   [ #  #  #  #  :    6740931 :                         rdma_recv->wr.next = NULL;
                   #  # ]
    4756         [ #  # ]:    6740931 :                         rqpair->current_recv_depth++;
    4757   [ #  #  #  # ]:    6740931 :                         rdma_recv->receive_tsc = poll_tsc;
    4758   [ #  #  #  # ]:    6740931 :                         rpoller->stat.requests++;
    4759   [ +  -  #  #  :    6740931 :                         STAILQ_INSERT_HEAD(&rqpair->resources->incoming_queue, rdma_recv, link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    4760                 :    6740931 :                         break;
    4761                 :     812687 :                 case RDMA_WR_TYPE_DATA:
    4762                 :     812687 :                         rdma_req = SPDK_CONTAINEROF(rdma_wr, struct spdk_nvmf_rdma_request, data_wr);
    4763   [ #  #  #  #  :     812687 :                         rqpair = SPDK_CONTAINEROF(rdma_req->req.qpair, struct spdk_nvmf_rdma_qpair, qpair);
                   #  # ]
    4764                 :            : 
    4765   [ -  +  #  #  :     812687 :                         assert(rdma_req->num_outstanding_data_wr > 0);
             #  #  #  # ]
    4766                 :            : 
    4767         [ #  # ]:     812687 :                         rqpair->current_send_depth--;
    4768         [ #  # ]:     812687 :                         rdma_req->num_outstanding_data_wr--;
    4769   [ +  -  #  #  :     812687 :                         if (!wc[i].status) {
          #  #  #  #  #  
                      # ]
    4770   [ -  +  #  #  :     812687 :                                 assert(wc[i].opcode == IBV_WC_RDMA_READ);
          #  #  #  #  #  
                #  #  # ]
    4771         [ #  # ]:     812687 :                                 rqpair->current_read_depth--;
    4772                 :            :                                 /* wait for all outstanding reads associated with the same rdma_req to complete before proceeding. */
    4773   [ +  +  #  #  :     812687 :                                 if (rdma_req->num_outstanding_data_wr == 0) {
                   #  # ]
    4774   [ +  +  #  #  :     664024 :                                         if (rdma_req->num_remaining_data_wr) {
                   #  # ]
    4775                 :            :                                                 /* Only part of RDMA_READ operations was submitted, process the rest */
    4776                 :      12152 :                                                 nvmf_rdma_request_reset_transfer_in(rdma_req, rtransport);
    4777   [ #  #  #  # ]:      12152 :                                                 rdma_req->state = RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING;
    4778                 :      12152 :                                                 nvmf_rdma_request_process(rtransport, rdma_req);
    4779                 :      12152 :                                                 break;
    4780                 :            :                                         }
    4781   [ #  #  #  # ]:     651872 :                                         rdma_req->state = RDMA_REQUEST_STATE_READY_TO_EXECUTE;
    4782                 :     651872 :                                         nvmf_rdma_request_process(rtransport, rdma_req);
    4783                 :          0 :                                 }
    4784                 :          0 :                         } else {
    4785                 :            :                                 /* If the data transfer fails still force the queue into the error state,
    4786                 :            :                                  * if we were performing an RDMA_READ, we need to force the request into a
    4787                 :            :                                  * completed state since it wasn't linked to a send. However, in the RDMA_WRITE
    4788                 :            :                                  * case, we should wait for the SEND to complete. */
    4789   [ #  #  #  #  :          0 :                                 if (rdma_req->data.wr.opcode == IBV_WR_RDMA_READ) {
          #  #  #  #  #  
                      # ]
    4790         [ #  # ]:          0 :                                         rqpair->current_read_depth--;
    4791   [ #  #  #  #  :          0 :                                         if (rdma_req->num_outstanding_data_wr == 0) {
                   #  # ]
    4792   [ #  #  #  # ]:          0 :                                                 rdma_req->state = RDMA_REQUEST_STATE_COMPLETED;
    4793                 :          0 :                                         }
    4794                 :          0 :                                 }
    4795                 :            :                         }
    4796                 :     800535 :                         break;
    4797                 :          0 :                 default:
    4798   [ #  #  #  #  :          0 :                         SPDK_ERRLOG("Received an unknown opcode on the CQ: %d\n", wc[i].opcode);
             #  #  #  # ]
    4799                 :          0 :                         continue;
    4800                 :            :                 }
    4801                 :            : 
    4802                 :            :                 /* Handle error conditions */
    4803   [ -  +  #  #  :   14293078 :                 if (wc[i].status) {
          #  #  #  #  #  
                      # ]
    4804                 :          0 :                         nvmf_rdma_update_ibv_state(rqpair);
    4805   [ #  #  #  # ]:          0 :                         nvmf_rdma_log_wc_status(rqpair, &wc[i]);
    4806                 :            : 
    4807                 :          0 :                         error = true;
    4808                 :            : 
    4809   [ #  #  #  #  :          0 :                         if (rqpair->qpair.state == SPDK_NVMF_QPAIR_ACTIVE) {
             #  #  #  # ]
    4810                 :            :                                 /* Disconnect the connection. */
    4811         [ #  # ]:          0 :                                 spdk_nvmf_qpair_disconnect(&rqpair->qpair, NULL, NULL);
    4812                 :          0 :                         } else {
    4813                 :          0 :                                 nvmf_rdma_destroy_drained_qpair(rqpair);
    4814                 :            :                         }
    4815                 :          0 :                         continue;
    4816                 :            :                 }
    4817                 :            : 
    4818                 :   14293078 :                 nvmf_rdma_qpair_process_pending(rtransport, rqpair, false);
    4819                 :            : 
    4820   [ +  +  #  #  :   14293078 :                 if (rqpair->qpair.state != SPDK_NVMF_QPAIR_ACTIVE) {
             #  #  #  # ]
    4821                 :        645 :                         nvmf_rdma_destroy_drained_qpair(rqpair);
    4822                 :          0 :                 }
    4823                 :          0 :         }
    4824                 :            : 
    4825   [ -  +  #  # ]:  697545286 :         if (error == true) {
    4826                 :          0 :                 return -1;
    4827                 :            :         }
    4828                 :            : 
    4829                 :            :         /* submit outstanding work requests. */
    4830                 :  697545286 :         _poller_submit_recvs(rtransport, rpoller);
    4831                 :  697545286 :         _poller_submit_sends(rtransport, rpoller);
    4832                 :            : 
    4833                 :  697545286 :         return count;
    4834                 :          0 : }
    4835                 :            : 
    4836                 :            : static void
    4837                 :          0 : _nvmf_rdma_remove_destroyed_device(void *c)
    4838                 :            : {
    4839                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport = c;
    4840                 :          0 :         struct spdk_nvmf_rdma_device    *device, *device_tmp;
    4841                 :          0 :         int                             rc;
    4842                 :            : 
    4843   [ #  #  #  #  :          0 :         TAILQ_FOREACH_SAFE(device, &rtransport->devices, link, device_tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4844   [ #  #  #  #  :          0 :                 if (device->ready_to_destroy) {
             #  #  #  # ]
    4845                 :          0 :                         destroy_ib_device(rtransport, device);
    4846                 :          0 :                 }
    4847                 :          0 :         }
    4848                 :            : 
    4849                 :          0 :         free_poll_fds(rtransport);
    4850                 :          0 :         rc = generate_poll_fds(rtransport);
    4851                 :            :         /* cannot handle fd allocation error here */
    4852         [ #  # ]:          0 :         if (rc != 0) {
    4853                 :          0 :                 SPDK_ERRLOG("Failed to generate poll fds after remove ib device.\n");
    4854                 :          0 :         }
    4855                 :          0 : }
    4856                 :            : 
    4857                 :            : static void
    4858                 :          0 : _nvmf_rdma_remove_poller_in_group_cb(void *c)
    4859                 :            : {
    4860                 :          0 :         struct poller_manage_ctx        *ctx = c;
    4861   [ #  #  #  # ]:          0 :         struct spdk_nvmf_rdma_transport *rtransport = ctx->rtransport;
    4862   [ #  #  #  # ]:          0 :         struct spdk_nvmf_rdma_device    *device = ctx->device;
    4863   [ #  #  #  # ]:          0 :         struct spdk_thread              *thread = ctx->thread;
    4864                 :            : 
    4865         [ #  # ]:          0 :         if (nvmf_rdma_all_pollers_management_done(c)) {
    4866                 :            :                 /* destroy device when last poller is destroyed */
    4867   [ #  #  #  # ]:          0 :                 device->ready_to_destroy = true;
    4868                 :          0 :                 spdk_thread_send_msg(thread, _nvmf_rdma_remove_destroyed_device, rtransport);
    4869                 :          0 :         }
    4870                 :          0 : }
    4871                 :            : 
    4872                 :            : static void
    4873                 :          0 : _nvmf_rdma_remove_poller_in_group(void *c)
    4874                 :            : {
    4875                 :          0 :         struct poller_manage_ctx                *ctx = c;
    4876                 :            : 
    4877   [ #  #  #  #  :          0 :         ctx->rpoller->need_destroy = true;
             #  #  #  # ]
    4878   [ #  #  #  #  :          0 :         ctx->rpoller->destroy_cb_ctx = ctx;
             #  #  #  # ]
    4879   [ #  #  #  #  :          0 :         ctx->rpoller->destroy_cb = _nvmf_rdma_remove_poller_in_group_cb;
             #  #  #  # ]
    4880                 :            : 
    4881                 :            :         /* qp will be disconnected after receiving a RDMA_CM_EVENT_DEVICE_REMOVAL event. */
    4882   [ #  #  #  #  :          0 :         if (RB_EMPTY(&ctx->rpoller->qpairs)) {
          #  #  #  #  #  
                #  #  # ]
    4883   [ #  #  #  # ]:          0 :                 nvmf_rdma_poller_destroy(ctx->rpoller);
    4884                 :          0 :         }
    4885                 :          0 : }
    4886                 :            : 
    4887                 :            : static int
    4888                 :  348772643 : nvmf_rdma_poll_group_poll(struct spdk_nvmf_transport_poll_group *group)
    4889                 :            : {
    4890                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    4891                 :          0 :         struct spdk_nvmf_rdma_poll_group *rgroup;
    4892                 :          0 :         struct spdk_nvmf_rdma_poller    *rpoller, *tmp;
    4893                 :          0 :         int                             count, rc;
    4894                 :            : 
    4895   [ #  #  #  # ]:  348772643 :         rtransport = SPDK_CONTAINEROF(group->transport, struct spdk_nvmf_rdma_transport, transport);
    4896                 :  348772643 :         rgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_rdma_poll_group, group);
    4897                 :            : 
    4898                 :  348772643 :         count = 0;
    4899   [ +  +  #  #  : 1046317929 :         TAILQ_FOREACH_SAFE(rpoller, &rgroup->pollers, link, tmp) {
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4900                 :  697545286 :                 rc = nvmf_rdma_poller_poll(rtransport, rpoller);
    4901         [ -  + ]:  697545286 :                 if (rc < 0) {
    4902                 :          0 :                         return rc;
    4903                 :            :                 }
    4904         [ #  # ]:  697545286 :                 count += rc;
    4905                 :          0 :         }
    4906                 :            : 
    4907                 :  348772643 :         return count;
    4908                 :          0 : }
    4909                 :            : 
    4910                 :            : static int
    4911                 :       2394 : nvmf_rdma_trid_from_cm_id(struct rdma_cm_id *id,
    4912                 :            :                           struct spdk_nvme_transport_id *trid,
    4913                 :            :                           bool peer)
    4914                 :            : {
    4915                 :          0 :         struct sockaddr *saddr;
    4916                 :          0 :         uint16_t port;
    4917                 :            : 
    4918                 :       2394 :         spdk_nvme_trid_populate_transport(trid, SPDK_NVME_TRANSPORT_RDMA);
    4919                 :            : 
    4920   [ -  +  #  # ]:       2394 :         if (peer) {
    4921                 :          0 :                 saddr = rdma_get_peer_addr(id);
    4922                 :          0 :         } else {
    4923                 :       2394 :                 saddr = rdma_get_local_addr(id);
    4924                 :            :         }
    4925   [ +  -  -  #  :       2394 :         switch (saddr->sa_family) {
                #  #  # ]
    4926                 :       2394 :         case AF_INET: {
    4927                 :       2394 :                 struct sockaddr_in *saddr_in = (struct sockaddr_in *)saddr;
    4928                 :            : 
    4929   [ #  #  #  # ]:       2394 :                 trid->adrfam = SPDK_NVMF_ADRFAM_IPV4;
    4930         [ #  # ]:       2394 :                 inet_ntop(AF_INET, &saddr_in->sin_addr,
    4931         [ #  # ]:       2394 :                           trid->traddr, sizeof(trid->traddr));
    4932   [ -  +  #  # ]:       2394 :                 if (peer) {
    4933                 :          0 :                         port = ntohs(rdma_get_dst_port(id));
    4934                 :          0 :                 } else {
    4935                 :       2394 :                         port = ntohs(rdma_get_src_port(id));
    4936                 :            :                 }
    4937         [ #  # ]:       2394 :                 snprintf(trid->trsvcid, sizeof(trid->trsvcid), "%u", port);
    4938                 :       2394 :                 break;
    4939                 :          0 :         }
    4940                 :          0 :         case AF_INET6: {
    4941                 :          0 :                 struct sockaddr_in6 *saddr_in = (struct sockaddr_in6 *)saddr;
    4942   [ #  #  #  # ]:          0 :                 trid->adrfam = SPDK_NVMF_ADRFAM_IPV6;
    4943         [ #  # ]:          0 :                 inet_ntop(AF_INET6, &saddr_in->sin6_addr,
    4944         [ #  # ]:          0 :                           trid->traddr, sizeof(trid->traddr));
    4945   [ #  #  #  # ]:          0 :                 if (peer) {
    4946                 :          0 :                         port = ntohs(rdma_get_dst_port(id));
    4947                 :          0 :                 } else {
    4948                 :          0 :                         port = ntohs(rdma_get_src_port(id));
    4949                 :            :                 }
    4950         [ #  # ]:          0 :                 snprintf(trid->trsvcid, sizeof(trid->trsvcid), "%u", port);
    4951                 :          0 :                 break;
    4952                 :          0 :         }
    4953                 :          0 :         default:
    4954                 :          0 :                 return -1;
    4955                 :            : 
    4956                 :            :         }
    4957                 :            : 
    4958                 :       2394 :         return 0;
    4959                 :          0 : }
    4960                 :            : 
    4961                 :            : static int
    4962                 :          0 : nvmf_rdma_qpair_get_peer_trid(struct spdk_nvmf_qpair *qpair,
    4963                 :            :                               struct spdk_nvme_transport_id *trid)
    4964                 :            : {
    4965                 :          0 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    4966                 :            : 
    4967                 :          0 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    4968                 :            : 
    4969   [ #  #  #  # ]:          0 :         return nvmf_rdma_trid_from_cm_id(rqpair->cm_id, trid, true);
    4970                 :          0 : }
    4971                 :            : 
    4972                 :            : static int
    4973                 :          0 : nvmf_rdma_qpair_get_local_trid(struct spdk_nvmf_qpair *qpair,
    4974                 :            :                                struct spdk_nvme_transport_id *trid)
    4975                 :            : {
    4976                 :          0 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    4977                 :            : 
    4978                 :          0 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    4979                 :            : 
    4980   [ #  #  #  # ]:          0 :         return nvmf_rdma_trid_from_cm_id(rqpair->cm_id, trid, false);
    4981                 :          0 : }
    4982                 :            : 
    4983                 :            : static int
    4984                 :       2394 : nvmf_rdma_qpair_get_listen_trid(struct spdk_nvmf_qpair *qpair,
    4985                 :            :                                 struct spdk_nvme_transport_id *trid)
    4986                 :            : {
    4987                 :          0 :         struct spdk_nvmf_rdma_qpair     *rqpair;
    4988                 :            : 
    4989                 :       2394 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    4990                 :            : 
    4991   [ #  #  #  # ]:       2394 :         return nvmf_rdma_trid_from_cm_id(rqpair->listen_id, trid, false);
    4992                 :          0 : }
    4993                 :            : 
    4994                 :            : void
    4995                 :          0 : spdk_nvmf_rdma_init_hooks(struct spdk_nvme_rdma_hooks *hooks)
    4996                 :            : {
    4997                 :          0 :         g_nvmf_hooks = *hooks;
    4998                 :          0 : }
    4999                 :            : 
    5000                 :            : static void
    5001                 :          0 : nvmf_rdma_request_set_abort_status(struct spdk_nvmf_request *req,
    5002                 :            :                                    struct spdk_nvmf_rdma_request *rdma_req_to_abort,
    5003                 :            :                                    struct spdk_nvmf_rdma_qpair *rqpair)
    5004                 :            : {
    5005   [ #  #  #  #  :          0 :         rdma_req_to_abort->req.rsp->nvme_cpl.status.sct = SPDK_NVME_SCT_GENERIC;
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    5006   [ #  #  #  #  :          0 :         rdma_req_to_abort->req.rsp->nvme_cpl.status.sc = SPDK_NVME_SC_ABORTED_BY_REQUEST;
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    5007                 :            : 
    5008   [ #  #  #  #  :          0 :         STAILQ_INSERT_TAIL(&rqpair->pending_rdma_send_queue, rdma_req_to_abort, state_link);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    5009   [ #  #  #  # ]:          0 :         rdma_req_to_abort->state = RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING;
    5010                 :            : 
    5011   [ #  #  #  #  :          0 :         req->rsp->nvme_cpl.cdw0 &= ~1U;       /* Command was successfully aborted. */
          #  #  #  #  #  
                      # ]
    5012                 :          0 : }
    5013                 :            : 
    5014                 :            : static int
    5015                 :       9683 : _nvmf_rdma_qpair_abort_request(void *ctx)
    5016                 :            : {
    5017                 :       9683 :         struct spdk_nvmf_request *req = ctx;
    5018   [ #  #  #  # ]:       9683 :         struct spdk_nvmf_rdma_request *rdma_req_to_abort = SPDK_CONTAINEROF(
    5019                 :            :                                 req->req_to_abort, struct spdk_nvmf_rdma_request, req);
    5020   [ #  #  #  #  :       9683 :         struct spdk_nvmf_rdma_qpair *rqpair = SPDK_CONTAINEROF(req->req_to_abort->qpair,
             #  #  #  # ]
    5021                 :            :                                               struct spdk_nvmf_rdma_qpair, qpair);
    5022                 :          0 :         int rc;
    5023                 :            : 
    5024         [ #  # ]:       9683 :         spdk_poller_unregister(&req->poller);
    5025                 :            : 
    5026   [ +  -  -  -  :       9683 :         switch (rdma_req_to_abort->state) {
          -  -  -  #  #  
                   #  # ]
    5027                 :       9683 :         case RDMA_REQUEST_STATE_EXECUTING:
    5028                 :       9683 :                 rc = nvmf_ctrlr_abort_request(req);
    5029         [ +  - ]:       9683 :                 if (rc == SPDK_NVMF_REQUEST_EXEC_STATUS_ASYNCHRONOUS) {
    5030                 :       9683 :                         return SPDK_POLLER_BUSY;
    5031                 :            :                 }
    5032                 :          0 :                 break;
    5033                 :            : 
    5034                 :          0 :         case RDMA_REQUEST_STATE_NEED_BUFFER:
    5035   [ #  #  #  #  :          0 :                 STAILQ_REMOVE(&rqpair->poller->group->group.pending_buf_queue,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    5036                 :            :                               &rdma_req_to_abort->req, spdk_nvmf_request, buf_link);
    5037                 :            : 
    5038                 :          0 :                 nvmf_rdma_request_set_abort_status(req, rdma_req_to_abort, rqpair);
    5039                 :          0 :                 break;
    5040                 :            : 
    5041                 :          0 :         case RDMA_REQUEST_STATE_DATA_TRANSFER_TO_CONTROLLER_PENDING:
    5042   [ #  #  #  #  :          0 :                 STAILQ_REMOVE(&rqpair->pending_rdma_read_queue, rdma_req_to_abort,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    5043                 :            :                               spdk_nvmf_rdma_request, state_link);
    5044                 :            : 
    5045                 :          0 :                 nvmf_rdma_request_set_abort_status(req, rdma_req_to_abort, rqpair);
    5046                 :          0 :                 break;
    5047                 :            : 
    5048                 :          0 :         case RDMA_REQUEST_STATE_DATA_TRANSFER_TO_HOST_PENDING:
    5049   [ #  #  #  #  :          0 :                 STAILQ_REMOVE(&rqpair->pending_rdma_write_queue, rdma_req_to_abort,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    5050                 :            :                               spdk_nvmf_rdma_request, state_link);
    5051                 :            : 
    5052                 :          0 :                 nvmf_rdma_request_set_abort_status(req, rdma_req_to_abort, rqpair);
    5053                 :          0 :                 break;
    5054                 :            : 
    5055                 :          0 :         case RDMA_REQUEST_STATE_READY_TO_COMPLETE_PENDING:
    5056                 :            :                 /* Remove req from the list here to re-use common function */
    5057   [ #  #  #  #  :          0 :                 STAILQ_REMOVE(&rqpair->pending_rdma_send_queue, rdma_req_to_abort,
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    5058                 :            :                               spdk_nvmf_rdma_request, state_link);
    5059                 :            : 
    5060                 :          0 :                 nvmf_rdma_request_set_abort_status(req, rdma_req_to_abort, rqpair);
    5061                 :          0 :                 break;
    5062                 :            : 
    5063                 :          0 :         case RDMA_REQUEST_STATE_TRANSFERRING_HOST_TO_CONTROLLER:
    5064   [ #  #  #  #  :          0 :                 if (spdk_get_ticks() < req->timeout_tsc) {
                   #  # ]
    5065   [ #  #  #  # ]:          0 :                         req->poller = SPDK_POLLER_REGISTER(_nvmf_rdma_qpair_abort_request, req, 0);
    5066                 :          0 :                         return SPDK_POLLER_BUSY;
    5067                 :            :                 }
    5068                 :          0 :                 break;
    5069                 :            : 
    5070                 :          0 :         default:
    5071                 :          0 :                 break;
    5072                 :            :         }
    5073                 :            : 
    5074                 :          0 :         spdk_nvmf_request_complete(req);
    5075                 :          0 :         return SPDK_POLLER_BUSY;
    5076                 :          0 : }
    5077                 :            : 
    5078                 :            : static void
    5079                 :       9743 : nvmf_rdma_qpair_abort_request(struct spdk_nvmf_qpair *qpair,
    5080                 :            :                               struct spdk_nvmf_request *req)
    5081                 :            : {
    5082                 :          0 :         struct spdk_nvmf_rdma_qpair *rqpair;
    5083                 :          0 :         struct spdk_nvmf_rdma_transport *rtransport;
    5084                 :          0 :         struct spdk_nvmf_transport *transport;
    5085                 :          0 :         uint16_t cid;
    5086                 :          0 :         uint32_t i, max_req_count;
    5087                 :       9743 :         struct spdk_nvmf_rdma_request *rdma_req_to_abort = NULL, *rdma_req;
    5088                 :            : 
    5089                 :       9743 :         rqpair = SPDK_CONTAINEROF(qpair, struct spdk_nvmf_rdma_qpair, qpair);
    5090   [ #  #  #  # ]:       9743 :         rtransport = SPDK_CONTAINEROF(qpair->transport, struct spdk_nvmf_rdma_transport, transport);
    5091         [ #  # ]:       9743 :         transport = &rtransport->transport;
    5092                 :            : 
    5093   [ #  #  #  #  :       9743 :         cid = req->cmd->nvme_cmd.cdw10_bits.abort.cid;
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    5094   [ -  +  #  #  :       9743 :         max_req_count = rqpair->srq == NULL ? rqpair->max_queue_depth : rqpair->poller->max_srq_depth;
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
    5095                 :            : 
    5096         [ +  + ]:     593843 :         for (i = 0; i < max_req_count; i++) {
    5097   [ #  #  #  #  :     593783 :                 rdma_req = &rqpair->resources->reqs[i];
          #  #  #  #  #  
                      # ]
    5098                 :            :                 /* When SRQ == NULL, rqpair has its own requests and req.qpair pointer always points to the qpair
    5099                 :            :                  * When SRQ != NULL all rqpairs share common requests and qpair pointer is assigned when we start to
    5100                 :            :                  * process a request. So in both cases all requests which are not in FREE state have valid qpair ptr */
    5101   [ +  +  +  +  :     593783 :                 if (rdma_req->state != RDMA_REQUEST_STATE_FREE && rdma_req->req.cmd->nvme_cmd.cid == cid &&
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                #  #  # ]
    5102   [ +  -  #  #  :       9683 :                     rdma_req->req.qpair == qpair) {
                   #  # ]
    5103                 :       9683 :                         rdma_req_to_abort = rdma_req;
    5104                 :       9683 :                         break;
    5105                 :            :                 }
    5106                 :          0 :         }
    5107                 :            : 
    5108         [ +  + ]:       9743 :         if (rdma_req_to_abort == NULL) {
    5109                 :         60 :                 spdk_nvmf_request_complete(req);
    5110                 :         60 :                 return;
    5111                 :            :         }
    5112                 :            : 
    5113   [ #  #  #  #  :       9683 :         req->req_to_abort = &rdma_req_to_abort->req;
                   #  # ]
    5114   [ #  #  #  # ]:      19366 :         req->timeout_tsc = spdk_get_ticks() +
    5115   [ #  #  #  #  :       9683 :                            transport->opts.abort_timeout_sec * spdk_get_ticks_hz();
                   #  # ]
    5116   [ #  #  #  # ]:       9683 :         req->poller = NULL;
    5117                 :            : 
    5118                 :       9683 :         _nvmf_rdma_qpair_abort_request(req);
    5119         [ #  # ]:          0 : }
    5120                 :            : 
    5121                 :            : static void
    5122                 :          8 : nvmf_rdma_poll_group_dump_stat(struct spdk_nvmf_transport_poll_group *group,
    5123                 :            :                                struct spdk_json_write_ctx *w)
    5124                 :            : {
    5125                 :          0 :         struct spdk_nvmf_rdma_poll_group *rgroup;
    5126                 :          0 :         struct spdk_nvmf_rdma_poller *rpoller;
    5127                 :            : 
    5128   [ -  +  #  # ]:          8 :         assert(w != NULL);
    5129                 :            : 
    5130                 :          8 :         rgroup = SPDK_CONTAINEROF(group, struct spdk_nvmf_rdma_poll_group, group);
    5131                 :            : 
    5132   [ #  #  #  #  :          8 :         spdk_json_write_named_uint64(w, "pending_data_buffer", rgroup->stat.pending_data_buffer);
                   #  # ]
    5133                 :            : 
    5134                 :          8 :         spdk_json_write_named_array_begin(w, "devices");
    5135                 :            : 
    5136   [ +  +  #  #  :         24 :         TAILQ_FOREACH(rpoller, &rgroup->pollers, link) {
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    5137                 :         16 :                 spdk_json_write_object_begin(w);
    5138                 :         16 :                 spdk_json_write_named_string(w, "name",
    5139   [ #  #  #  #  :         16 :                                              ibv_get_device_name(rpoller->device->context->device));
          #  #  #  #  #  
                #  #  # ]
    5140                 :         16 :                 spdk_json_write_named_uint64(w, "polls",
    5141   [ #  #  #  #  :          0 :                                              rpoller->stat.polls);
                   #  # ]
    5142                 :         16 :                 spdk_json_write_named_uint64(w, "idle_polls",
    5143   [ #  #  #  #  :          0 :                                              rpoller->stat.idle_polls);
                   #  # ]
    5144                 :         16 :                 spdk_json_write_named_uint64(w, "completions",
    5145   [ #  #  #  #  :          0 :                                              rpoller->stat.completions);
                   #  # ]
    5146                 :         16 :                 spdk_json_write_named_uint64(w, "requests",
    5147   [ #  #  #  #  :          0 :                                              rpoller->stat.requests);
                   #  # ]
    5148                 :         16 :                 spdk_json_write_named_uint64(w, "request_latency",
    5149   [ #  #  #  #  :          0 :                                              rpoller->stat.request_latency);
                   #  # ]
    5150                 :         16 :                 spdk_json_write_named_uint64(w, "pending_free_request",
    5151   [ #  #  #  #  :          0 :                                              rpoller->stat.pending_free_request);
                   #  # ]
    5152                 :         16 :                 spdk_json_write_named_uint64(w, "pending_rdma_read",
    5153   [ #  #  #  #  :          0 :                                              rpoller->stat.pending_rdma_read);
                   #  # ]
    5154                 :         16 :                 spdk_json_write_named_uint64(w, "pending_rdma_write",
    5155   [ #  #  #  #  :          0 :                                              rpoller->stat.pending_rdma_write);
                   #  # ]
    5156                 :         16 :                 spdk_json_write_named_uint64(w, "pending_rdma_send",
    5157   [ #  #  #  #  :          0 :                                              rpoller->stat.pending_rdma_send);
                   #  # ]
    5158                 :         16 :                 spdk_json_write_named_uint64(w, "total_send_wrs",
    5159   [ #  #  #  #  :          0 :                                              rpoller->stat.qp_stats.send.num_submitted_wrs);
          #  #  #  #  #  
                      # ]
    5160                 :         16 :                 spdk_json_write_named_uint64(w, "send_doorbell_updates",
    5161   [ #  #  #  #  :          0 :                                              rpoller->stat.qp_stats.send.doorbell_updates);
          #  #  #  #  #  
                      # ]
    5162                 :         16 :                 spdk_json_write_named_uint64(w, "total_recv_wrs",
    5163   [ #  #  #  #  :          0 :                                              rpoller->stat.qp_stats.recv.num_submitted_wrs);
          #  #  #  #  #  
                      # ]
    5164                 :         16 :                 spdk_json_write_named_uint64(w, "recv_doorbell_updates",
    5165   [ #  #  #  #  :          0 :                                              rpoller->stat.qp_stats.recv.doorbell_updates);
          #  #  #  #  #  
                      # ]
    5166                 :         16 :                 spdk_json_write_object_end(w);
    5167                 :          0 :         }
    5168                 :            : 
    5169                 :          8 :         spdk_json_write_array_end(w);
    5170                 :          8 : }
    5171                 :            : 
    5172                 :            : const struct spdk_nvmf_transport_ops spdk_nvmf_transport_rdma = {
    5173                 :            :         .name = "RDMA",
    5174                 :            :         .type = SPDK_NVME_TRANSPORT_RDMA,
    5175                 :            :         .opts_init = nvmf_rdma_opts_init,
    5176                 :            :         .create = nvmf_rdma_create,
    5177                 :            :         .dump_opts = nvmf_rdma_dump_opts,
    5178                 :            :         .destroy = nvmf_rdma_destroy,
    5179                 :            : 
    5180                 :            :         .listen = nvmf_rdma_listen,
    5181                 :            :         .stop_listen = nvmf_rdma_stop_listen,
    5182                 :            :         .cdata_init = nvmf_rdma_cdata_init,
    5183                 :            : 
    5184                 :            :         .listener_discover = nvmf_rdma_discover,
    5185                 :            : 
    5186                 :            :         .poll_group_create = nvmf_rdma_poll_group_create,
    5187                 :            :         .get_optimal_poll_group = nvmf_rdma_get_optimal_poll_group,
    5188                 :            :         .poll_group_destroy = nvmf_rdma_poll_group_destroy,
    5189                 :            :         .poll_group_add = nvmf_rdma_poll_group_add,
    5190                 :            :         .poll_group_remove = nvmf_rdma_poll_group_remove,
    5191                 :            :         .poll_group_poll = nvmf_rdma_poll_group_poll,
    5192                 :            : 
    5193                 :            :         .req_free = nvmf_rdma_request_free,
    5194                 :            :         .req_complete = nvmf_rdma_request_complete,
    5195                 :            : 
    5196                 :            :         .qpair_fini = nvmf_rdma_close_qpair,
    5197                 :            :         .qpair_get_peer_trid = nvmf_rdma_qpair_get_peer_trid,
    5198                 :            :         .qpair_get_local_trid = nvmf_rdma_qpair_get_local_trid,
    5199                 :            :         .qpair_get_listen_trid = nvmf_rdma_qpair_get_listen_trid,
    5200                 :            :         .qpair_abort_request = nvmf_rdma_qpair_abort_request,
    5201                 :            : 
    5202                 :            :         .poll_group_dump_stat = nvmf_rdma_poll_group_dump_stat,
    5203                 :            : };
    5204                 :            : 
    5205                 :        783 : SPDK_NVMF_TRANSPORT_REGISTER(rdma, &spdk_nvmf_transport_rdma);
    5206                 :        783 : SPDK_LOG_REGISTER_COMPONENT(rdma)

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