xfs: failure mapping nfs fh to inode should return ESTALE

On xfs exports, nfsd is incorrectly returning ENOENT instead of
ESTALE on attempts to use a filehandle of a deleted file (spotted
with pynfs test PUTFH3).  The ENOENT was coming from xfs_iget.

(It's tempting to wonder whether we should just map all xfs_iget
errors to ESTALE, but I don't believe so--xfs_iget can also return
ENOMEM at least, which we wouldn't want mapped to ESTALE.)

While we're at it, the other return of ENOENT in xfs_nfs_get_inode()
also looks wrong.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>

diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c
index f4f878f..75e5d32 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -151,14 +151,14 @@ xfs_nfs_get_inode(
                 * We don't use ESTALE directly down the chain to not
                 * confuse applications using bulkstat that expect EINVAL.
                 */
-               if (error == EINVAL)
+               if (error == EINVAL || error == ENOENT)
                        error = ESTALE;
                return ERR_PTR(-error);
        }
 
        if (ip->i_d.di_gen != generation) {
                IRELE(ip);
-               return ERR_PTR(-ENOENT);
+               return ERR_PTR(-ESTALE);
        }
 
        return VFS_I(ip);