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author | Barry Naujok <bnaujok@sgi.com> | 2008-05-21 16:58:22 +1000 |
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committer | Niv Sardi <xaiki@debian.org> | 2008-07-28 16:58:40 +1000 |
commit | 384f3ced07efdddf6838f6527366089d37843c94 (patch) | |
tree | 13037bc99115f6f940b6fe924b75dc48e0577678 /fs/xfs/xfs_da_btree.h | |
parent | 9403540c0653122ca34884a180439ddbfcbcb524 (diff) | |
download | kernel_samsung_tuna-384f3ced07efdddf6838f6527366089d37843c94.zip kernel_samsung_tuna-384f3ced07efdddf6838f6527366089d37843c94.tar.gz kernel_samsung_tuna-384f3ced07efdddf6838f6527366089d37843c94.tar.bz2 |
[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_da_btree.h')
-rw-r--r-- | fs/xfs/xfs_da_btree.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_da_btree.h b/fs/xfs/xfs_da_btree.h index 8face64..8be0b00 100644 --- a/fs/xfs/xfs_da_btree.h +++ b/fs/xfs/xfs_da_btree.h @@ -143,6 +143,7 @@ typedef struct xfs_da_args { #define XFS_DA_OP_RENAME 0x0002 /* this is an atomic rename op */ #define XFS_DA_OP_ADDNAME 0x0004 /* this is an add operation */ #define XFS_DA_OP_OKNOENT 0x0008 /* lookup/add op, ENOENT ok, else die */ +#define XFS_DA_OP_CILOOKUP 0x0010 /* lookup to return CI name if found */ /* * Structure to describe buffer(s) for a block. |