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| author | Kinglong Mee <kinglongmee@gmail.com> | 2017-02-25 19:23:27 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-02-27 10:07:44 -0800 |
| commit | 5f35a2cd5b503e59ac949283a423f868e94fb36b (patch) | |
| tree | 7b01874bf2c4b654348aac87d41fe216ca39d414 /fs/f2fs/xattr.c | |
| parent | 317e13009682d4614ec9ac7c2762eaee26f93ed3 (diff) | |
| download | linux-5f35a2cd5b503e59ac949283a423f868e94fb36b.tar.bz2 | |
f2fs: Don't update the xattr data that same as the exist
f2fs removes the old xattr data and appends the new data although
the new data is same as the exist.
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/xattr.c')
| -rw-r--r-- | fs/f2fs/xattr.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index b50f6b581a71..dbfd5cbfa46c 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -545,6 +545,13 @@ cleanup: return error; } +static bool f2fs_xattr_value_same(struct f2fs_xattr_entry *entry, + const void *value, size_t size) +{ + void *pval = entry->e_name + entry->e_name_len; + return (entry->e_value_size == size) && !memcmp(pval, value, size); +} + static int __f2fs_setxattr(struct inode *inode, int index, const char *name, const void *value, size_t size, struct page *ipage, int flags) @@ -579,12 +586,17 @@ static int __f2fs_setxattr(struct inode *inode, int index, found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; - if ((flags & XATTR_REPLACE) && !found) { + if (found) { + if ((flags & XATTR_CREATE)) { + error = -EEXIST; + goto exit; + } + + if (f2fs_xattr_value_same(here, value, size)) + goto exit; + } else if ((flags & XATTR_REPLACE)) { error = -ENODATA; goto exit; - } else if ((flags & XATTR_CREATE) && found) { - error = -EEXIST; - goto exit; } last = here; |