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author | Barry Naujok <bnaujok@sgi.com> | 2008-05-21 16:58:22 +1000 |
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committer | Barry Naujok <bnaujok@sgi.com> | 2008-05-21 16:58:22 +1000 |
commit | f0775a14cd11addb7f635904230701d73449c978 (patch) | |
tree | 123c6452485fa4e9446ef464530225960d35407f /fs/xfs/xfs_sb.h | |
parent | 467ac40e70edf4bf088c3ffe72d44b6e6fceb5d0 (diff) |
[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_sb.h')
0 files changed, 0 insertions, 0 deletions