| From 5ddf1e0ff00fd808c048d0b920784828276cc516 Mon Sep 17 00:00:00 2001 |
| From: Jeff Layton <jlayton@redhat.com> |
| Date: Sun, 5 Jul 2009 11:01:02 -0400 |
| Subject: cifs: fix regression with O_EXCL creates and optimize away lookup |
| |
| From: Jeff Layton <jlayton@redhat.com> |
| |
| commit 5ddf1e0ff00fd808c048d0b920784828276cc516 upstream. |
| |
| cifs: fix regression with O_EXCL creates and optimize away lookup |
| |
| Signed-off-by: Jeff Layton <jlayton@redhat.com> |
| Tested-by: Shirish Pargaonkar <shirishp@gmail.com> |
| Signed-off-by: Steve French <sfrench@us.ibm.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| |
| --- |
| fs/cifs/dir.c | 9 +++++++++ |
| 1 file changed, 9 insertions(+) |
| |
| --- a/fs/cifs/dir.c |
| +++ b/fs/cifs/dir.c |
| @@ -641,6 +641,15 @@ cifs_lookup(struct inode *parent_dir_ino |
| } |
| } |
| |
| + /* |
| + * 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 */ |
