release/5.2.22/pNFS-Ensure-we-do-clear-the-return-on-close-layout-s.patch

From aa63fc081f710392ddc5b78147ec5f3909f8063e Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trondmy@gmail.com>
Date: Fri, 20 Sep 2019 07:23:40 -0400
Subject: [PATCH] pNFS: Ensure we do clear the return-on-close layout stateid
 on fatal errors

commit 9c47b18cf722184f32148784189fca945a7d0561 upstream.

IF the server rejected our layout return with a state error such as
NFS4ERR_BAD_STATEID, or even a stale inode error, then we do want
to clear out all the remaining layout segments and mark that stateid
as invalid.

Fixes: 1c5bd76d17cca ("pNFS: Enable layoutreturn operation for...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index bfe1f4625f60..33c2ef416564 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1449,10 +1449,15 @@ void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
 	const nfs4_stateid *res_stateid = NULL;
 	struct nfs4_xdr_opaque_data *ld_private = args->ld_private;
 
-	if (ret == 0) {
-		arg_stateid = &args->stateid;
+	switch (ret) {
+	case -NFS4ERR_NOMATCHING_LAYOUT:
+		break;
+	case 0:
 		if (res->lrs_present)
 			res_stateid = &res->stateid;
+		/* Fallthrough */
+	default:
+		arg_stateid = &args->stateid;
 	}
 	pnfs_layoutreturn_free_lsegs(lo, arg_stateid, &args->range,
 			res_stateid);
-- 
2.7.4