From 5ddf1e0ff00fd808c048d0b920784828276cc516 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Sun, 5 Jul 2009 11:01:02 -0400 Subject: [PATCH] cifs: fix regression with O_EXCL creates and optimize away lookup cifs: fix regression with O_EXCL creates and optimize away lookup Signed-off-by: Jeff Layton Tested-by: Shirish Pargaonkar CC: Stable Kernel Signed-off-by: Steve French --- fs/cifs/dir.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index a40054f..ff55fc6 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -643,6 +643,15 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, } } + /* + * O_EXCL: optimize away the lookup, but don't hash the dentry. Let + * the VFS handle the create. + */ + if (nd->flags & LOOKUP_EXCL) { + d_instantiate(direntry, NULL); + return 0; + } + /* can not grab the rename sem here since it would deadlock in the cases (beginning of sys_rename itself) in which we already have the sb rename sem */ -- 2.7.4