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: 183d9e7 ("pnfs: rework LAYOUTGET retry handling")
Signed-off-by: Trond Myklebust <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>

Author: Trond Myklebust

fs/nfs/pnfs.c

@@ -2152,6 +2152,12 @@ pnfs_update_layout(struct inode *ino,
 		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));