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| author | Qu Wenruo <wqu@suse.com> | 2020-05-15 14:01:40 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-05-25 11:25:35 +0200 |
| commit | 92a7cc4252231d1641b36c38cf845cfc50308ab0 (patch) | |
| tree | 9dcd3b8ba373c5c064563bfd8ce4be772901d5e3 /fs/btrfs/backref.c | |
| parent | ae3e715f85fff878b317369b898cf4b89785c80a (diff) | |
| download | linux-92a7cc4252231d1641b36c38cf845cfc50308ab0.tar.gz linux-92a7cc4252231d1641b36c38cf845cfc50308ab0.tar.bz2 linux-92a7cc4252231d1641b36c38cf845cfc50308ab0.zip | |
btrfs: rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE
The name BTRFS_ROOT_REF_COWS is not very clear about the meaning.
In fact, that bit can only be set to those trees:
- Subvolume roots
- Data reloc root
- Reloc roots for above roots
All other trees won't get this bit set. So just by the result, it is
obvious that, roots with this bit set can have tree blocks shared with
other trees. Either shared by snapshots, or by reloc roots (an special
snapshot created by relocation).
This patch will rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE to
make it easier to understand, and update all comment mentioning
"reference counted" to follow the rename.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/backref.c')
| -rw-r--r-- | fs/btrfs/backref.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index ac3c34f47b56..41ef3fa91864 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -2702,7 +2702,7 @@ static int handle_indirect_tree_backref(struct btrfs_backref_cache *cache, root = btrfs_get_fs_root(fs_info, &root_key, false); if (IS_ERR(root)) return PTR_ERR(root); - if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state)) + if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state)) cur->cowonly = 1; if (btrfs_root_level(&root->root_item) == cur->level) { @@ -2789,7 +2789,7 @@ static int handle_indirect_tree_backref(struct btrfs_backref_cache *cache, goto out; } upper->owner = btrfs_header_owner(eb); - if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state)) + if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state)) upper->cowonly = 1; /* |