LCOV - code coverage report
Current view: top level - lib/nvme - nvme_discovery.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 79 0.0 %
Date: 2024-12-08 21:45:36 Functions: 0 4 0.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2021 Intel Corporation. All rights reserved.
       3             :  */
       4             : 
       5             : #include "nvme_internal.h"
       6             : 
       7             : #include "spdk/endian.h"
       8             : 
       9             : struct nvme_discovery_ctx {
      10             :         struct spdk_nvme_ctrlr                  *ctrlr;
      11             :         struct spdk_nvmf_discovery_log_page     *log_page;
      12             :         uint64_t                                start_genctr;
      13             :         uint64_t                                end_genctr;
      14             :         spdk_nvme_discovery_cb                  cb_fn;
      15             :         void                                    *cb_arg;
      16             : };
      17             : 
      18             : static void
      19           0 : get_log_page_completion_final(void *cb_arg, const struct spdk_nvme_cpl *cpl)
      20             : {
      21           0 :         struct nvme_discovery_ctx *ctx = cb_arg;
      22             :         int rc;
      23             : 
      24           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
      25           0 :                 free(ctx->log_page);
      26           0 :                 ctx->cb_fn(ctx->cb_arg, 0, cpl, NULL);
      27           0 :                 free(ctx);
      28           0 :                 return;
      29             :         }
      30             : 
      31             :         /* Compare original genctr with latest genctr. If it changed, we need to restart. */
      32           0 :         if (ctx->start_genctr == ctx->end_genctr) {
      33           0 :                 ctx->cb_fn(ctx->cb_arg, 0, cpl, ctx->log_page);
      34             :         } else {
      35           0 :                 free(ctx->log_page);
      36           0 :                 rc = spdk_nvme_ctrlr_get_discovery_log_page(ctx->ctrlr, ctx->cb_fn, ctx->cb_arg);
      37           0 :                 if (rc != 0) {
      38           0 :                         ctx->cb_fn(ctx->cb_arg, rc, NULL, NULL);
      39             :                 }
      40             :         }
      41           0 :         free(ctx);
      42             : }
      43             : 
      44             : static void
      45           0 : get_log_page_completion(void *cb_arg, const struct spdk_nvme_cpl *cpl)
      46             : {
      47           0 :         struct nvme_discovery_ctx *ctx = cb_arg;
      48             :         int rc;
      49             : 
      50           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
      51           0 :                 free(ctx->log_page);
      52           0 :                 ctx->cb_fn(ctx->cb_arg, 0, cpl, NULL);
      53           0 :                 free(ctx);
      54           0 :                 return;
      55             :         }
      56             : 
      57           0 :         rc = spdk_nvme_ctrlr_cmd_get_log_page(ctx->ctrlr, SPDK_NVME_LOG_DISCOVERY, 0,
      58           0 :                                               &ctx->end_genctr, sizeof(ctx->end_genctr), 0,
      59             :                                               get_log_page_completion_final, ctx);
      60           0 :         if (rc != 0) {
      61           0 :                 free(ctx->log_page);
      62           0 :                 ctx->cb_fn(ctx->cb_arg, rc, NULL, NULL);
      63           0 :                 free(ctx);
      64             :         }
      65             : }
      66             : 
      67             : static void
      68           0 : discovery_log_header_completion(void *cb_arg, const struct spdk_nvme_cpl *cpl)
      69             : {
      70             :         struct spdk_nvmf_discovery_log_page *new_page;
      71           0 :         struct nvme_discovery_ctx *ctx = cb_arg;
      72             :         size_t page_size;
      73             :         uint16_t recfmt;
      74             :         uint64_t numrec;
      75             :         int rc;
      76             : 
      77           0 :         if (spdk_nvme_cpl_is_error(cpl)) {
      78             :                 /* Return without printing anything - this may not be a discovery controller */
      79           0 :                 ctx->cb_fn(ctx->cb_arg, 0, cpl, NULL);
      80           0 :                 free(ctx->log_page);
      81           0 :                 free(ctx);
      82           0 :                 return;
      83             :         }
      84             : 
      85             :         /* Got the first 4K of the discovery log page */
      86           0 :         recfmt = from_le16(&ctx->log_page->recfmt);
      87           0 :         if (recfmt != 0) {
      88           0 :                 SPDK_ERRLOG("Unrecognized discovery log record format %" PRIu16 "\n", recfmt);
      89           0 :                 ctx->cb_fn(ctx->cb_arg, -EINVAL, NULL, NULL);
      90           0 :                 free(ctx->log_page);
      91           0 :                 free(ctx);
      92           0 :                 return;
      93             :         }
      94             : 
      95           0 :         ctx->start_genctr = ctx->log_page->genctr;
      96             : 
      97           0 :         numrec = from_le64(&ctx->log_page->numrec);
      98             : 
      99           0 :         if (numrec == 0) {
     100             :                 /* No entries in the discovery log. So we can just return the header to the
     101             :                  * caller.
     102             :                  */
     103           0 :                 get_log_page_completion(ctx, cpl);
     104           0 :                 return;
     105             :         }
     106             : 
     107             :         /*
     108             :          * Now that we know how many entries should be in the log page, we can allocate
     109             :          * the full log page buffer.
     110             :          */
     111           0 :         page_size = sizeof(struct spdk_nvmf_discovery_log_page);
     112           0 :         page_size += numrec * sizeof(struct spdk_nvmf_discovery_log_page_entry);
     113           0 :         new_page = realloc(ctx->log_page, page_size);
     114           0 :         if (new_page == NULL) {
     115           0 :                 SPDK_ERRLOG("Could not allocate buffer for log page (%" PRIu64 " entries)\n",
     116             :                             numrec);
     117           0 :                 ctx->cb_fn(ctx->cb_arg, -ENOMEM, NULL, NULL);
     118           0 :                 free(ctx->log_page);
     119           0 :                 free(ctx);
     120           0 :                 return;
     121             :         }
     122             : 
     123           0 :         ctx->log_page = new_page;
     124             : 
     125             :         /* Retrieve the entire discovery log page */
     126           0 :         rc = spdk_nvme_ctrlr_cmd_get_log_page(ctx->ctrlr, SPDK_NVME_LOG_DISCOVERY,
     127           0 :                                               0, (char *)ctx->log_page, page_size, 0,
     128             :                                               get_log_page_completion, ctx);
     129           0 :         if (rc != 0) {
     130           0 :                 free(ctx->log_page);
     131           0 :                 ctx->cb_fn(ctx->cb_arg, rc, NULL, NULL);
     132           0 :                 free(ctx);
     133             :         }
     134             : }
     135             : 
     136             : int
     137           0 : spdk_nvme_ctrlr_get_discovery_log_page(struct spdk_nvme_ctrlr *ctrlr,
     138             :                                        spdk_nvme_discovery_cb cb_fn, void *cb_arg)
     139             : {
     140             :         struct nvme_discovery_ctx *ctx;
     141             :         int rc;
     142             : 
     143           0 :         ctx = calloc(1, sizeof(*ctx));
     144           0 :         if (ctx == NULL) {
     145           0 :                 return -ENOMEM;
     146             :         }
     147             : 
     148           0 :         ctx->log_page = calloc(1, sizeof(*ctx->log_page));
     149           0 :         if (ctx->log_page == NULL) {
     150           0 :                 free(ctx);
     151           0 :                 return -ENOMEM;
     152             :         }
     153             : 
     154           0 :         ctx->ctrlr = ctrlr;
     155           0 :         ctx->cb_fn = cb_fn;
     156           0 :         ctx->cb_arg = cb_arg;
     157             : 
     158           0 :         rc = spdk_nvme_ctrlr_cmd_get_log_page(ctrlr, SPDK_NVME_LOG_DISCOVERY, 0,
     159           0 :                                               ctx->log_page, sizeof(*ctx->log_page), 0,
     160             :                                               discovery_log_header_completion, ctx);
     161           0 :         if (rc != 0) {
     162           0 :                 free(ctx->log_page);
     163           0 :                 free(ctx);
     164             :         }
     165             : 
     166           0 :         return rc;
     167             : }

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