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authorChengguang Xu <cgxu519@zoho.com.cn>2019-05-28 05:59:47 +0300
committerJan Kara <jack@suse.cz>2019-05-28 11:23:52 +0300
commit1eaf5faab18cd55a3658e0c7517654325f59a793 (patch)
treed836a20b84fc05cfd471a94093ab476460070ea6 /fs/ext2
parentd561d4dd4f560e4d97bf665c5eeab7ac9fe8aca3 (diff)
downloadlinux-1eaf5faab18cd55a3658e0c7517654325f59a793.tar.xz
ext2: optimize ext2_xattr_get()
Since xattr entry names are sorted, we don't have to continue when current entry name is greater than target. Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext2')
-rw-r--r--fs/ext2/xattr.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 59356cd2a842..839e71e78673 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -199,7 +199,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name,
struct ext2_xattr_entry *entry;
size_t name_len, size;
char *end;
- int error;
+ int error, not_found;
struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode);
ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld",
@@ -238,10 +238,14 @@ bad_block:
if (!ext2_xattr_entry_valid(entry, end,
inode->i_sb->s_blocksize))
goto bad_block;
- if (name_index == entry->e_name_index &&
- name_len == entry->e_name_len &&
- memcmp(name, entry->e_name, name_len) == 0)
+
+ not_found = ext2_xattr_cmp_entry(name_index, name_len, name,
+ entry);
+ if (!not_found)
goto found;
+ if (not_found < 0)
+ break;
+
entry = EXT2_XATTR_NEXT(entry);
}
if (ext2_xattr_cache_insert(ea_block_cache, bh))