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| author | Tahsin Erdogan <tahsin@google.com> | 2017-06-21 22:02:06 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-06-21 22:02:06 -0400 |
| commit | 0bd454c04f02e7bb101d8ff510b54826eda4a5f0 (patch) | |
| tree | 2be30a10b0e7b7ddc2c653a4f8243dc7a2be7eae /fs/ext4/xattr.c | |
| parent | 990461dd85d57875accc798919e6fe42ab7e294d (diff) | |
| download | linux-0bd454c04f02e7bb101d8ff510b54826eda4a5f0.tar.gz linux-0bd454c04f02e7bb101d8ff510b54826eda4a5f0.tar.bz2 linux-0bd454c04f02e7bb101d8ff510b54826eda4a5f0.zip | |
ext4: ext4_xattr_value_same() should return false for external data
ext4_xattr_value_same() is used as a quick optimization in case the new
xattr value is identical to the previous value. When xattr value is
stored in a xattr inode the check becomes expensive so it is better to
just assume that they are not equal.
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/xattr.c')
| -rw-r--r-- | fs/ext4/xattr.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 3983bc455d02..13b7fa4cbf16 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -1426,6 +1426,9 @@ static int ext4_xattr_value_same(struct ext4_xattr_search *s, { void *value; + /* When e_value_inum is set the value is stored externally. */ + if (s->here->e_value_inum) + return 0; if (le32_to_cpu(s->here->e_value_size) != i->value_len) return 0; value = ((void *)s->base) + le16_to_cpu(s->here->e_value_offs); |