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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>
This commit is contained in:
Trond Myklebust 2008-03-06 12:34:59 -05:00
parent c37dcd334c
commit 4e99a1ff34
1 changed files with 2 additions and 0 deletions
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2
fs/nfs/dir.c
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@ -710,6 +710,8 @@ int nfs_lookup_verify_inode(struct inode *inode, struct nameidata *nd)
{
struct nfs_server *server = NFS_SERVER(inode);
if (test_bit(NFS_INO_MOUNTPOINT, &NFS_I(inode)->flags))
return 0;
if (nd != NULL) {
/* VFS wants an on-the-wire revalidation */
if (nd->flags & LOOKUP_REVAL)