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| author | Johannes Thumshirn <johannes.thumshirn@wdc.com> | 2023-12-13 17:43:02 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-12-16 01:03:59 +0300 |
| commit | d9d4ce9f297febc1463872475e4d1f6a97deb357 (patch) | |
| tree | e149824ff435deb911d13aecbdfa93e64d1cc233 /fs/btrfs/volumes.c | |
| parent | 8938f112b9c41aaf66f652fc18aa424d2990e15c (diff) | |
| download | linux-d9d4ce9f297febc1463872475e4d1f6a97deb357.tar.xz | |
btrfs: reduce scope of data_stripes in btrfs_map_block
Reduce the scope of 'data_stripes' in btrfs_map_block(). While the
change alone may not make too much sense, it helps us factoring out a
helper function for the block mapping of RAID56 I/O.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 125aa0f25d20..d5c55724666b 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6478,7 +6478,6 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, struct btrfs_chunk_map *map; struct btrfs_io_geometry io_geom = { 0 }; u64 map_offset; - int data_stripes; int i; int ret = 0; int num_copies; @@ -6503,8 +6502,6 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, if (IS_ERR(map)) return PTR_ERR(map); - data_stripes = nr_data_stripes(map); - map_offset = logical - map->start; io_geom.raid56_full_stripe_start = (u64)-1; max_len = btrfs_max_io_len(map, io_geom.op, map_offset, &io_geom.stripe_nr, @@ -6530,6 +6527,8 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, } else if (map->type & BTRFS_BLOCK_GROUP_RAID10) { map_blocks_raid10(fs_info, map, &io_geom, dev_replace_is_ongoing); } else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) { + int data_stripes = nr_data_stripes(map); + if (op != BTRFS_MAP_READ || io_geom.mirror_num > 1) { /* * Needs full stripe mapping. @@ -6641,7 +6640,8 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, * modulo, to reduce one modulo call. */ bioc->full_stripe_logical = map->start + - btrfs_stripe_nr_to_offset(io_geom.stripe_nr * data_stripes); + btrfs_stripe_nr_to_offset(io_geom.stripe_nr * + nr_data_stripes(map)); for (int i = 0; i < io_geom.num_stripes; i++) { ret = set_io_stripe(fs_info, op, logical, length, &bioc->stripes[i], map, |