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

[ Upstream commit fe44fb23d6ccde4c914c44ef74ab8d9d9ba02bea ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 18bbdaefd9405d10f710137cb8b1bc58a7505b71..962585e00c8683e030724f07c7cf4c5f7cef97da 100644 (file)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1878,6 +1878,12 @@ lookup_again:
                        /* Fallthrough */
                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));