From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 7 Jun 2005 22:37:01 +0000 (-0400)
Subject: [PATCH] NFS: Fix lookup intent handling
X-Git-Tag: v2.6.12~73
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1d6757fbff5bc86e94e59ab0d7bdd7e71351d839;p=pandora-kernel.git

[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>
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