LCOV - code coverage report
Current view: top level - spdk/lib/ftl/base - ftl_base_bdev.c (source / functions) Hit Total Coverage
Test: Combined Lines: 38 46 82.6 %
Date: 2024-11-20 12:53:29 Functions: 5 5 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 13 148 8.8 %

           Branch data     Line data    Source code
       1                 :            : /*   SPDX-License-Identifier: BSD-3-Clause
       2                 :            :  *   Copyright 2023 Solidigm All Rights Reserved
       3                 :            :  */
       4                 :            : 
       5                 :            : #include "ftl_base_dev.h"
       6                 :            : #include "ftl_core.h"
       7                 :            : #include "ftl_layout.h"
       8                 :            : #include "ftl_band.h"
       9                 :            : #include "utils/ftl_layout_tracker_bdev.h"
      10                 :            : 
      11                 :            : static bool
      12                 :         22 : is_bdev_compatible(struct spdk_ftl_dev *dev, struct spdk_bdev *bdev)
      13                 :            : {
      14                 :         22 :         return spdk_bdev_get_block_size(bdev) == FTL_BLOCK_SIZE;
      15                 :            : }
      16                 :            : 
      17                 :            : static void
      18                 :         32 : md_region_setup(struct spdk_ftl_dev *dev, enum ftl_layout_region_type reg_type,
      19                 :            :                 struct ftl_layout_region *region)
      20                 :            : {
      21   [ -  +  #  # ]:         32 :         assert(region);
      22   [ #  #  #  # ]:         32 :         region->type = reg_type;
      23   [ #  #  #  # ]:         32 :         region->mirror_type = FTL_LAYOUT_REGION_TYPE_INVALID;
      24   [ #  #  #  # ]:         32 :         region->name = ftl_md_region_name(reg_type);
      25                 :            : 
      26   [ #  #  #  #  :         32 :         region->bdev_desc = dev->base_bdev_desc;
             #  #  #  # ]
      27   [ #  #  #  #  :         32 :         region->ioch = dev->base_ioch;
             #  #  #  # ]
      28   [ #  #  #  # ]:         32 :         region->vss_blksz = 0;
      29                 :         32 : }
      30                 :            : 
      31                 :            : static int
      32                 :         32 : md_region_create(struct spdk_ftl_dev *dev, enum ftl_layout_region_type reg_type,
      33                 :            :                  uint32_t reg_version, size_t reg_blks)
      34                 :            : {
      35                 :            :         const struct ftl_layout_tracker_bdev_region_props *reg_props;
      36                 :            :         uint64_t data_base_alignment;
      37                 :            : 
      38   [ -  +  #  # ]:         32 :         assert(reg_type < FTL_LAYOUT_REGION_TYPE_MAX);
      39                 :         32 :         reg_blks = ftl_md_region_align_blocks(dev, reg_blks);
      40                 :            : 
      41                 :            :         /* Allocating a ftl_bitmap requires a 8B input buffer alignment, since we're reusing the global valid map md buffer
      42                 :            :          * this means that each band starting address needs to be aligned too - each device sector takes 1b in the valid map,
      43                 :            :          * so 64 sectors (8*8) is the needed alignment
      44                 :            :          */
      45                 :         32 :         data_base_alignment = 8 * ftl_bitmap_buffer_alignment;
      46   [ #  #  #  # ]:         32 :         reg_props = ftl_layout_tracker_bdev_add_region(dev->base_layout_tracker, reg_type, reg_version,
      47                 :          0 :                         reg_blks, data_base_alignment);
      48         [ -  + ]:         32 :         if (!reg_props) {
      49                 :          0 :                 return -1;
      50                 :            :         }
      51   [ -  +  #  #  :         32 :         assert(reg_props->type == reg_type);
             #  #  #  # ]
      52   [ -  +  #  #  :         32 :         assert(reg_props->ver == reg_version);
             #  #  #  # ]
      53   [ -  +  #  #  :         32 :         assert(reg_props->blk_sz == reg_blks);
             #  #  #  # ]
      54   [ -  +  #  #  :         32 :         assert(reg_props->blk_offs + reg_blks <= dev->layout.base.total_blocks);
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
      55                 :         32 :         return 0;
      56                 :          0 : }
      57                 :            : 
      58                 :            : static int
      59                 :         32 : md_region_open(struct spdk_ftl_dev *dev, enum ftl_layout_region_type reg_type, uint32_t reg_version,
      60                 :            :                size_t entry_size, size_t entry_count, struct ftl_layout_region *region)
      61                 :            : {
      62                 :         32 :         const struct ftl_layout_tracker_bdev_region_props *reg_search_ctx = NULL;
      63                 :         32 :         uint64_t reg_blks = ftl_md_region_blocks(dev, entry_size * entry_count);
      64                 :            : 
      65   [ +  -  #  # ]:         32 :         assert(reg_type < FTL_LAYOUT_REGION_TYPE_MAX);
      66                 :            : 
      67                 :          0 :         while (true) {
      68   [ #  #  #  # ]:         32 :                 ftl_layout_tracker_bdev_find_next_region(dev->base_layout_tracker, reg_type, &reg_search_ctx);
      69   [ +  -  -  +  :         32 :                 if (!reg_search_ctx || reg_search_ctx->ver == reg_version) {
             #  #  #  # ]
      70                 :          0 :                         break;
      71                 :            :                 }
      72                 :            :         }
      73                 :            : 
      74   [ +  -  -  +  :         32 :         if (!reg_search_ctx || reg_search_ctx->blk_sz < reg_blks) {
             #  #  #  # ]
      75                 :            :                 /* Region not found or insufficient space */
      76                 :          0 :                 return -1;
      77                 :            :         }
      78                 :            : 
      79         [ -  + ]:         32 :         if (!region) {
      80                 :          0 :                 return 0;
      81                 :            :         }
      82                 :            : 
      83                 :         32 :         md_region_setup(dev, reg_type, region);
      84                 :            : 
      85   [ #  #  #  #  :         32 :         region->entry_size = entry_size / FTL_BLOCK_SIZE;
                   #  # ]
      86   [ #  #  #  # ]:         32 :         region->num_entries = entry_count;
      87                 :            : 
      88   [ #  #  #  #  :         32 :         region->current.version = reg_version;
                   #  # ]
      89   [ #  #  #  #  :         32 :         region->current.offset = reg_search_ctx->blk_offs;
          #  #  #  #  #  
                      # ]
      90   [ #  #  #  #  :         32 :         region->current.blocks = reg_search_ctx->blk_sz;
          #  #  #  #  #  
                      # ]
      91                 :            : 
      92                 :         32 :         return 0;
      93                 :          0 : }
      94                 :            : 
      95                 :            : struct ftl_base_device_type base_bdev = {
      96                 :            :         .name = "base_bdev",
      97                 :            :         .ops = {
      98                 :            :                 .is_bdev_compatible = is_bdev_compatible,
      99                 :            : 
     100                 :            :                 .md_layout_ops = {
     101                 :            :                         .region_create = md_region_create,
     102                 :            :                         .region_open = md_region_open,
     103                 :            :                 },
     104                 :            :         }
     105                 :            : };
     106                 :       2097 : FTL_BASE_DEVICE_TYPE_REGISTER(base_bdev)

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