Ensure that we fix up the missing fields in the nfs_mount_data with
 sane defaults for older versions of mount, and return errors in the
 cases where we cannot.

 Convert a bunch of annoying warnings into dprintks()

 Return -EPROTONOSUPPORT rather than EIO if mount() tries to set NFSv3
 without it actually being compiled in.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

 This saves us a couple of lines of cleanup code for each call.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

This fixes a data corruption error for mail delivery applications that
expect to be able to do posix locking and then append writes on NFS.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

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: NTrond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch makes some needlessly global identifiers static.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Acked-by: NArjan van de Ven <arjanv@infradead.org>
Acked-by: NTrond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!