From: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Date: Tue, 7 Feb 2023 17:46:35 +0000 (+0100)
Subject: nfs42: do not fail with EIO if ssc returns NFS4ERR_OFFLOAD_DENIED
X-Git-Tag: v6.6.17~5484^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4730515378a70064581b27ed112fcfc6f2a379ca;p=platform%2Fkernel%2Flinux-rpi.git

nfs42: do not fail with EIO if ssc returns NFS4ERR_OFFLOAD_DENIED

The NFSv4.2 server even if supports intra-SSC might prefer that for
a particular file a classic copy is performed. As returning ENOTSUPP
will clear the SSC capability of the server by the client, server
might return NFS4ERR_OFFLOAD_DENIED (well, spec talks about remote
servers there).

Update nfs42_proc_copy to handle NFS4ERR_OFFLOAD_DENIED as ENOTSUPP,
but without clearing NFS_CAP_COPY bit.

Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index ecb4285..93e306b 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -460,7 +460,8 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
 
 		if (err >= 0)
 			break;
-		if (err == -ENOTSUPP &&
+		if ((err == -ENOTSUPP ||
+				err == -NFS4ERR_OFFLOAD_DENIED) &&
 				nfs42_files_from_same_server(src, dst)) {
 			err = -EOPNOTSUPP;
 			break;