1 files changed, 19 insertions, 4 deletions

diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c
index 595751f78350..87b8cbd23d4b 100644
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -126,11 +126,26 @@ xfs_nfs_get_inode(
         if (ino == 0)
                 return ERR_PTR(-ESTALE);
 
-        error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0);
-        if (error)
+        /*
+         * The XFS_IGET_BULKSTAT means that an invalid inode number is just
+         * fine and not an indication of a corrupted filesystem.  Because
+         * clients can send any kind of invalid file handle, e.g. after
+         * a restore on the server we have to deal with this case gracefully.
+         */
+        error = xfs_iget(mp, NULL, ino, XFS_IGET_BULKSTAT,
+                         XFS_ILOCK_SHARED, &ip, 0);
+        if (error) {
+                /*
+                 * EINVAL means the inode cluster doesn't exist anymore.
+                 * This implies the filehandle is stale, so we should
+                 * translate it here.
+                 * We don't use ESTALE directly down the chain to not
+                 * confuse applications using bulkstat that expect EINVAL.
+                 */
+                if (error == EINVAL)
+                        error = ESTALE;
                 return ERR_PTR(-error);
-        if (!ip)
-                return ERR_PTR(-EIO);
+        }
 
         if (ip->i_d.di_gen != generation) {
                 xfs_iput_new(ip, XFS_ILOCK_SHARED);