LCOV - code coverage report
Current view: top level - lib/ftl/upgrade - ftl_p2l_upgrade.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 44 0.0 %
Date: 2024-07-15 12:01:57 Functions: 0 6 0.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2022 Intel Corporation.
       3             :  *   All rights reserved.
       4             :  */
       5             : 
       6             : #include "mngt/ftl_mngt.h"
       7             : #include "mngt/ftl_mngt_steps.h"
       8             : #include "ftl_layout_upgrade.h"
       9             : 
      10             : struct upgrade_ctx {
      11             :         struct ftl_md                   *md;
      12             :         struct ftl_layout_region        reg;
      13             : };
      14             : 
      15             : static void
      16           0 : v2_upgrade_cleanup(struct ftl_layout_upgrade_ctx *lctx)
      17             : {
      18           0 :         struct upgrade_ctx *ctx = lctx->ctx;
      19             : 
      20           0 :         if (ctx->md) {
      21           0 :                 ftl_md_destroy(ctx->md, 0);
      22           0 :                 ctx->md = NULL;
      23             :         }
      24           0 : }
      25             : 
      26             : static void
      27           0 : v2_upgrade_finish(struct spdk_ftl_dev *dev, struct ftl_layout_upgrade_ctx *lctx, int status)
      28             : {
      29           0 :         struct upgrade_ctx *ctx = lctx->ctx;
      30             : 
      31           0 :         v2_upgrade_cleanup(lctx);
      32           0 :         ftl_region_upgrade_completed(dev, lctx, ctx->reg.entry_size, ctx->reg.num_entries, status);
      33           0 : }
      34             : 
      35             : static void
      36           0 : v2_upgrade_md_cb(struct spdk_ftl_dev *dev, struct ftl_md *md, int status)
      37             : {
      38           0 :         struct ftl_layout_upgrade_ctx *lctx = md->owner.cb_ctx;
      39             : 
      40           0 :         v2_upgrade_finish(dev, lctx, status);
      41           0 : }
      42             : 
      43             : static int
      44           0 : v2_upgrade_setup_ctx(struct spdk_ftl_dev *dev, struct ftl_layout_upgrade_ctx *lctx, uint32_t type)
      45             : {
      46           0 :         struct upgrade_ctx *ctx = lctx->ctx;
      47           0 :         const struct ftl_md_layout_ops *md_ops = &dev->nv_cache.nvc_type->ops.md_layout_ops;
      48             : 
      49             :         /* TODO Add validation if no open bands */
      50             : 
      51             :         /* Open metadata region */
      52           0 :         if (md_ops->region_open(dev, lctx->reg->type, FTL_P2L_VERSION_2,
      53             :                                 sizeof(struct ftl_p2l_ckpt_page_no_vss),
      54             :                                 dev->layout.p2l.ckpt_pages, &ctx->reg)) {
      55           0 :                 return -1;
      56             :         }
      57             : 
      58           0 :         ctx->md = ftl_md_create(dev, ctx->reg.current.blocks, 0, ctx->reg.name, FTL_MD_CREATE_HEAP,
      59           0 :                                 &ctx->reg);
      60           0 :         if (!ctx->md) {
      61           0 :                 return -1;
      62             :         }
      63             : 
      64           0 :         ctx->md->owner.cb_ctx = lctx;
      65           0 :         ctx->md->cb = v2_upgrade_md_cb;
      66             : 
      67           0 :         return 0;
      68             : }
      69             : 
      70             : static int
      71           0 : v2_upgrade(struct spdk_ftl_dev *dev, struct ftl_layout_upgrade_ctx *lctx)
      72             : {
      73           0 :         struct upgrade_ctx *ctx = lctx->ctx;
      74             : 
      75           0 :         if (v2_upgrade_setup_ctx(dev, lctx, lctx->reg->type)) {
      76           0 :                 goto error;
      77             :         }
      78           0 :         ftl_md_clear(ctx->md, 0, NULL);
      79           0 :         return 0;
      80           0 : error:
      81           0 :         v2_upgrade_cleanup(lctx);
      82           0 :         return -1;
      83             : }
      84             : 
      85             : static int
      86           0 : v1_to_v2_upgrade_enabled(struct spdk_ftl_dev *dev, struct ftl_layout_region *region)
      87             : {
      88           0 :         const struct ftl_md_layout_ops *md_ops = &dev->nv_cache.nvc_type->ops.md_layout_ops;
      89             : 
      90           0 :         if (ftl_region_major_upgrade_enabled(dev, region)) {
      91           0 :                 return -1;
      92             :         }
      93             : 
      94             :         /* Create the new P2L metadata region (v2) up front - this allocates a separate entry in the superblock and
      95             :          * area on the cache for us. This is to reserve space for other region upgrades allocating new regions and it
      96             :          * allows us to do an atomic upgrade of the whole region.
      97             :          *
      98             :          * If the upgrade is stopped by power failure/crash after the V2 region has been added, then the upgrade process
      99             :          * will start again (since V1 still exists), but region_create will fail (since the v2 region has already been
     100             :          * created). In such a case only verification of the region length by region_open is needed.
     101             :          *
     102             :          * Once the upgrade is fully done, the old v1 region entry will be removed from the SB and its area on the cache
     103             :          * freed.
     104             :          */
     105           0 :         if (md_ops->region_create(dev, region->type, FTL_P2L_VERSION_2, dev->layout.p2l.ckpt_pages) &&
     106           0 :             md_ops->region_open(dev, region->type, FTL_P2L_VERSION_2, sizeof(struct ftl_p2l_ckpt_page_no_vss),
     107             :                                 dev->layout.p2l.ckpt_pages, NULL)) {
     108           0 :                 return -1;
     109             :         }
     110             : 
     111           0 :         return 0;
     112             : }
     113             : 
     114             : struct ftl_region_upgrade_desc p2l_upgrade_desc[] = {
     115             :         [FTL_P2L_VERSION_0] = {
     116             :                 .verify = ftl_region_upgrade_disabled
     117             :         },
     118             :         [FTL_P2L_VERSION_1] = {
     119             :                 .verify = v1_to_v2_upgrade_enabled,
     120             :                 .ctx_size = sizeof(struct upgrade_ctx),
     121             :                 .new_version = FTL_P2L_VERSION_2,
     122             :                 .upgrade = v2_upgrade,
     123             :         },
     124             : };
     125             : 
     126             : SPDK_STATIC_ASSERT(SPDK_COUNTOF(p2l_upgrade_desc) == FTL_P2L_VERSION_CURRENT,
     127             :                    "Missing P2L region upgrade descriptors");

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