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cifs: fix regression with O_EXCL creates and optimize away lookup

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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>
CC: Stable Kernel <stable@kernel.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton 2009-07-05 11:01:02 -04:00 committed by Steve French
parent cc0bad7552
commit 5ddf1e0ff0
1 changed files with 9 additions and 0 deletions
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9
fs/cifs/dir.c
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@ -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 */