pNFS: Don't keep retrying if the server replied NFS4ERR_LAYOUTUNAVAILABLE

If the server tells us that a pNFS layout is not available for a
specific file, then we should not keep pounding it with further
layoutget requests.

Fixes: 183d9e7b112a ("pnfs: rework LAYOUTGET retry handling")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 68a87be3e6f96fb4e8ab7a038d1f2bc789c05a7e..4609e641710e4da02f05a162e8bbe49bc51e3b89 100644 (file)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -2152,6 +2152,12 @@ lookup_again:
                case -ERECALLCONFLICT:
                case -EAGAIN:
                        break;
+               case -ENODATA:
+                       /* The server returned NFS4ERR_LAYOUTUNAVAILABLE */
+                       pnfs_layout_set_fail_bit(
+                               lo, pnfs_iomode_to_fail_bit(iomode));
+                       lseg = NULL;
+                       goto out_put_layout_hdr;
                default:
                        if (!nfs_error_is_fatal(PTR_ERR(lseg))) {
                                pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));