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| author | Barry Naujok <bnaujok@sgi.com> | 2008-05-21 16:58:22 +1000 |
|---|---|---|
| committer | Niv Sardi <xaiki@debian.org> | 2008-07-28 16:58:40 +1000 |
| commit | 384f3ced07efdddf6838f6527366089d37843c94 (patch) | |
| tree | 13037bc99115f6f940b6fe924b75dc48e0577678 /fs/xfs/xfs_dir2.h | |
| parent | 9403540c0653122ca34884a180439ddbfcbcb524 (diff) | |
| download | linux-384f3ced07efdddf6838f6527366089d37843c94.tar.gz linux-384f3ced07efdddf6838f6527366089d37843c94.tar.bz2 linux-384f3ced07efdddf6838f6527366089d37843c94.zip | |
[XFS] Return case-insensitive match for dentry cache
This implements the code to store the actual filename found during a
lookup in the dentry cache and to avoid multiple entries in the dcache
pointing to the same inode.
To avoid polluting the dcache, we implement a new directory inode
operations for lookup. xfs_vn_ci_lookup() stores the correct case name in
the dcache.
The "actual name" is only allocated and returned for a case- insensitive
match and not an actual match.
Another unusual interaction with the dcache is not storing negative
dentries like other filesystems doing a d_add(dentry, NULL) when an ENOENT
is returned. During the VFS lookup, if a dentry returned has no inode,
dput is called and ENOENT is returned. By not doing a d_add, this actually
removes it completely from the dcache to be reused. create/rename have to
be modified to support unhashed dentries being passed in.
SGI-PV: 981521
SGI-Modid: xfs-linux-melb:xfs-kern:31208a
Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Diffstat (limited to 'fs/xfs/xfs_dir2.h')
| -rw-r--r-- | fs/xfs/xfs_dir2.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/xfs/xfs_dir2.h b/fs/xfs/xfs_dir2.h index 6392f939029f..1d9ef96f33aa 100644 --- a/fs/xfs/xfs_dir2.h +++ b/fs/xfs/xfs_dir2.h @@ -74,7 +74,8 @@ extern int xfs_dir_createname(struct xfs_trans *tp, struct xfs_inode *dp, xfs_fsblock_t *first, struct xfs_bmap_free *flist, xfs_extlen_t tot); extern int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp, - struct xfs_name *name, xfs_ino_t *inum); + struct xfs_name *name, xfs_ino_t *inum, + struct xfs_name *ci_name); extern int xfs_dir_removename(struct xfs_trans *tp, struct xfs_inode *dp, struct xfs_name *name, xfs_ino_t ino, xfs_fsblock_t *first, @@ -99,4 +100,7 @@ extern int xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, extern int xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db, struct xfs_dabuf *bp); +extern int xfs_dir_cilookup_result(struct xfs_da_args *args, const char *name, + int len); + #endif /* __XFS_DIR2_H__ */ |