LCOV - code coverage report
Current view: top level - lib/iscsi - task.h (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 36 36 100.0 %
Date: 2024-12-14 14:15:14 Functions: 12 12 100.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
       3             :  *   Copyright (C) 2016 Intel Corporation.
       4             :  *   All rights reserved.
       5             :  */
       6             : 
       7             : #ifndef SPDK_ISCSI_TASK_H
       8             : #define SPDK_ISCSI_TASK_H
       9             : 
      10             : #include "iscsi/iscsi.h"
      11             : #include "spdk/scsi.h"
      12             : #include "spdk/util.h"
      13             : 
      14             : struct spdk_iscsi_task {
      15             :         struct spdk_scsi_task   scsi;
      16             : 
      17             :         struct spdk_iscsi_task *parent;
      18             : 
      19             :         struct spdk_iscsi_conn *conn;
      20             :         struct spdk_iscsi_pdu *pdu;
      21             :         struct spdk_mobj *mobj;
      22             :         uint64_t start_tsc;
      23             :         uint32_t outstanding_r2t;
      24             : 
      25             :         uint32_t desired_data_transfer_length;
      26             : 
      27             :         /* Only valid for Read/Write */
      28             :         uint32_t bytes_completed;
      29             : 
      30             :         uint32_t data_out_cnt;
      31             : 
      32             :         /*
      33             :          * Tracks the current offset of large read or write io.
      34             :          */
      35             :         uint32_t current_data_offset;
      36             : 
      37             :         /*
      38             :          * next_expected_r2t_offset is used when we receive
      39             :          * the DataOUT PDU.
      40             :          */
      41             :         uint32_t next_expected_r2t_offset;
      42             : 
      43             :         /*
      44             :          * Tracks the length of the R2T that is in progress.
      45             :          * Used to check that an R2T burst does not exceed
      46             :          *  MaxBurstLength.
      47             :          */
      48             :         uint32_t current_r2t_length;
      49             : 
      50             :         /*
      51             :          * next_r2t_offset is used when we are sending the
      52             :          * R2T packet to keep track of next offset of r2t.
      53             :          */
      54             :         uint32_t next_r2t_offset;
      55             :         uint32_t R2TSN;
      56             :         uint32_t r2t_datasn; /* record next datasn for a r2tsn */
      57             :         uint32_t acked_r2tsn; /* next r2tsn to be acked */
      58             :         uint32_t datain_datasn;
      59             :         uint32_t acked_data_sn; /* next expected datain datasn */
      60             :         uint32_t ttt;
      61             :         bool is_r2t_active;
      62             : 
      63             :         uint32_t tag;
      64             : 
      65             :         /**
      66             :          * Record the lun id just in case the lun is invalid,
      67             :          * which will happen when hot removing the lun.
      68             :          */
      69             :         int lun_id;
      70             : 
      71             :         struct spdk_poller *mgmt_poller;
      72             : 
      73             :         TAILQ_ENTRY(spdk_iscsi_task) link;
      74             : 
      75             :         TAILQ_HEAD(subtask_list, spdk_iscsi_task) subtask_list;
      76             :         TAILQ_ENTRY(spdk_iscsi_task) subtask_link;
      77             :         bool is_queued; /* is queued in scsi layer for handling */
      78             : };
      79             : 
      80             : static inline void
      81          80 : iscsi_task_put(struct spdk_iscsi_task *task)
      82             : {
      83          80 :         spdk_scsi_task_put(&task->scsi);
      84          80 : }
      85             : 
      86             : static inline struct spdk_iscsi_pdu *
      87          77 : iscsi_task_get_pdu(struct spdk_iscsi_task *task)
      88             : {
      89          77 :         return task->pdu;
      90             : }
      91             : 
      92             : static inline void
      93          48 : iscsi_task_set_pdu(struct spdk_iscsi_task *task, struct spdk_iscsi_pdu *pdu)
      94             : {
      95          48 :         task->pdu = pdu;
      96          48 : }
      97             : 
      98             : static inline struct iscsi_bhs *
      99          23 : iscsi_task_get_bhs(struct spdk_iscsi_task *task)
     100             : {
     101          23 :         return &iscsi_task_get_pdu(task)->bhs;
     102             : }
     103             : 
     104             : static inline void
     105          23 : iscsi_task_associate_pdu(struct spdk_iscsi_task *task, struct spdk_iscsi_pdu *pdu)
     106             : {
     107          23 :         iscsi_task_set_pdu(task, pdu);
     108          23 :         pdu->ref++;
     109          23 : }
     110             : 
     111             : static inline void
     112           1 : iscsi_task_disassociate_pdu(struct spdk_iscsi_task *task)
     113             : {
     114           1 :         if (iscsi_task_get_pdu(task)) {
     115           1 :                 iscsi_put_pdu(iscsi_task_get_pdu(task));
     116           1 :                 iscsi_task_set_pdu(task, NULL);
     117             :         }
     118           1 : }
     119             : 
     120             : static inline int
     121           9 : iscsi_task_is_immediate(struct spdk_iscsi_task *task)
     122             : {
     123             :         struct iscsi_bhs_scsi_req *scsi_req;
     124             : 
     125           9 :         scsi_req = (struct iscsi_bhs_scsi_req *)iscsi_task_get_bhs(task);
     126           9 :         return (scsi_req->immediate == 1);
     127             : }
     128             : 
     129             : static inline int
     130          14 : iscsi_task_is_read(struct spdk_iscsi_task *task)
     131             : {
     132             :         struct iscsi_bhs_scsi_req *scsi_req;
     133             : 
     134          14 :         scsi_req = (struct iscsi_bhs_scsi_req *)iscsi_task_get_bhs(task);
     135          14 :         return (scsi_req->read_bit == 1);
     136             : }
     137             : 
     138             : struct spdk_iscsi_task *iscsi_task_get(struct spdk_iscsi_conn *conn,
     139             :                                        struct spdk_iscsi_task *parent,
     140             :                                        spdk_scsi_task_cpl cpl_fn);
     141             : 
     142             : static inline struct spdk_iscsi_task *
     143          92 : iscsi_task_from_scsi_task(struct spdk_scsi_task *task)
     144             : {
     145          92 :         return SPDK_CONTAINEROF(task, struct spdk_iscsi_task, scsi);
     146             : }
     147             : 
     148             : static inline struct spdk_iscsi_task *
     149          36 : iscsi_task_get_primary(struct spdk_iscsi_task *task)
     150             : {
     151          36 :         if (task->parent) {
     152          21 :                 return task->parent;
     153             :         } else {
     154          15 :                 return task;
     155             :         }
     156             : }
     157             : 
     158             : static inline void
     159          18 : iscsi_task_set_mobj(struct spdk_iscsi_task *task, struct spdk_mobj *mobj)
     160             : {
     161          18 :         task->mobj = mobj;
     162          18 : }
     163             : 
     164             : static inline struct spdk_mobj *
     165          12 : iscsi_task_get_mobj(struct spdk_iscsi_task *task)
     166             : {
     167          12 :         return task->mobj;
     168             : }
     169             : 
     170             : #endif /* SPDK_ISCSI_TASK_H */

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