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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_block.c | |
| parent | dcache: Add case-insensitive support d_ci_add() routine (diff) | |
| download | linux-dev-384f3ced07efdddf6838f6527366089d37843c94.tar.xz linux-dev-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_block.c')
| -rw-r--r-- | fs/xfs/xfs_dir2_block.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c index dee225918db2..e2fa0a1d8e96 100644 --- a/fs/xfs/xfs_dir2_block.c +++ b/fs/xfs/xfs_dir2_block.c @@ -610,14 +610,15 @@ xfs_dir2_block_lookup( /* * Get the offset from the leaf entry, to point to the data. */ - dep = (xfs_dir2_data_entry_t *) - ((char *)block + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(blp[ent].address))); + dep = (xfs_dir2_data_entry_t *)((char *)block + + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(blp[ent].address))); /* - * Fill in inode number, release the block. + * Fill in inode number, CI name if appropriate, release the block. */ args->inumber = be64_to_cpu(dep->inumber); + error = xfs_dir_cilookup_result(args, dep->name, dep->namelen); xfs_da_brelse(args->trans, bp); - return XFS_ERROR(EEXIST); + return XFS_ERROR(error); } /* |