tree ad22bf99412be3470ebe3a3dde51172826eb7a1a
parent c37dcd334c0b0a46a90cfa13b9f69e2aaa89bc09
author Trond Myklebust <Trond.Myklebust@netapp.com> 1204824899 -0500
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1204918541 -0500

NFS: Fix dentry revalidation for NFSv4 referrals and mountpoint crossings

As long as the directory contents haven't changed, we should just let the
path walk proceed to cross the mountpoint. Apart from being an optimisation
in the case of 'nohide' mountpoint traversals, it also fixes an issue with
referrals: referral inodes don't have valid filehandles, so calling
nfs_revalidate_inode() on them is a bug.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>