From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Tue, 31 May 2022 15:03:06 +0000 (-0400)
Subject: pNFS: Don't keep retrying if the server replied NFS4ERR_LAYOUTUNAVAILABLE
X-Git-Tag: v4.14.285~29
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=290e3215f7ee0bb83c03c64efa3e3912df6021f8;p=thirdparty%2Fkernel%2Fstable.git

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 18bbdaefd9405..962585e00c868 100644
--- 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));