diff options
| author | Nikolay Borisov <nborisov@suse.com> | 2019-01-08 17:53:46 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-02-25 16:13:21 +0300 |
| commit | 951e05a90469e29326715e7e3aefd4680748b4fa (patch) | |
| tree | a5a44b1dde45f55237363a9b3710e719fc7dffc9 /fs | |
| parent | d00c2d9c76975d70089418dc1447b51da3a6a118 (diff) | |
| download | linux-951e05a90469e29326715e7e3aefd4680748b4fa.tar.xz | |
btrfs: Remove impossible condition from mergable_maps
We can never have extents marked as EXTENT_MAP_DELALLOC since this
value is only ever used by btrfs_get_extent_fiemap. In this case the
extent map is created by btrfs_get_extent_fiemap and is never really
published, this flag is used to return the corresponding userspace one.
Considering this, it's pointless having a check for EXTENT_MAP_DELALLOC
in mergable_maps. Just remove it.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent_map.c | 5 | ||||
| -rw-r--r-- | fs/btrfs/extent_map.h | 1 |
2 files changed, 4 insertions, 2 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index a042a193c120..928f729c55ba 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -210,6 +210,9 @@ static int mergable_maps(struct extent_map *prev, struct extent_map *next) if (!list_empty(&prev->list) || !list_empty(&next->list)) return 0; + ASSERT(next->block_start != EXTENT_MAP_DELALLOC && + prev->block_start != EXTENT_MAP_DELALLOC); + if (extent_map_end(prev) == next->start && prev->flags == next->flags && prev->bdev == next->bdev && @@ -217,8 +220,6 @@ static int mergable_maps(struct extent_map *prev, struct extent_map *next) prev->block_start == EXTENT_MAP_HOLE) || (next->block_start == EXTENT_MAP_INLINE && prev->block_start == EXTENT_MAP_INLINE) || - (next->block_start == EXTENT_MAP_DELALLOC && - prev->block_start == EXTENT_MAP_DELALLOC) || (next->block_start < EXTENT_MAP_LAST_BYTE - 1 && next->block_start == extent_map_block_end(prev)))) { return 1; diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index ef05a0121652..473f039fcd7c 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -9,6 +9,7 @@ #define EXTENT_MAP_LAST_BYTE ((u64)-4) #define EXTENT_MAP_HOLE ((u64)-3) #define EXTENT_MAP_INLINE ((u64)-2) +/* used only during fiemap calls */ #define EXTENT_MAP_DELALLOC ((u64)-1) /* bits for the extent_map::flags field */ |