From: Olga Kornievskaia <kolga@netapp.com>
Date: Thu, 24 Aug 2023 16:43:53 -0400
Subject: [PATCH] NFSv4.2: fix handling of COPY ERR_OFFLOAD_NO_REQ
Git-commit: 5690eed941ab7e33c3c3d6b850100cabf740f075
Patch-mainline: v6.6
References: git-fixes

If the client sent a synchronous copy and the server replied with
ERR_OFFLOAD_NO_REQ indicating that it wants an asynchronous
copy instead, the client should retry with asynchronous copy.

Fixes: 539f57b3e0fd ("NFS handle COPY ERR_OFFLOAD_NO_REQS")
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Acked-by: NeilBrown <neilb@suse.com>

---
 fs/nfs/nfs42proc.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -467,8 +467,9 @@ ssize_t nfs42_proc_copy(struct file *src
 				continue;
 			}
 			break;
-		} else if (err == -NFS4ERR_OFFLOAD_NO_REQS && !args.sync) {
-			args.sync = true;
+		} else if (err == -NFS4ERR_OFFLOAD_NO_REQS &&
+				args.sync != res.synchronous) {
+			args.sync = res.synchronous;
 			dst_exception.retry = 1;
 			continue;
 		} else if ((err == -ESTALE ||