From: Barry Naujok Date: Wed, 21 May 2008 06:58:22 +0000 (+1000) Subject: [XFS] Return case-insensitive match for dentry cache X-Git-Tag: v2.6.27-rc2~91^2~37 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=384f3ced07efdddf6838f6527366089d37843c94;p=pandora-kernel.git [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 Signed-off-by: Christoph Hellwig --- Reading git-diff-tree failed