tree 65e75b32e0810961615101cb1f137a060c707c6b
parent eba4f669d6ec9be4173bb2619e9b8500b3c36542
author Trond Myklebust <Trond.Myklebust@netapp.com> 1118183821 -0400
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1118184827 -0700

[PATCH] NFS: Fix lookup intent handling

We should never apply a lookup intent to anything other than the last
path component in an open(), create() or access() call.

Introduce the helper nfs_lookup_check_intent() which always returns
zero if LOOKUP_CONTINUE or LOOKUP_PARENT are set, and returns the
intent flags if we're on the last component of the lookup.
By doing so, we fix a bug in open(O_EXCL), where we may end up
optimizing away a real lookup of the parent directory.

Problem noticed by Linda Dunaphant <linda.dunaphant@ccur.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>