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From:   Olga Kornievskaia <olga.kornievskaia@gmail.com>
To:     trond.myklebust@hammerspace.com, anna.schumaker@netapp.com,
        bfields@redhat.com
Cc:     linux-nfs@vger.kernel.org
Subject: [PATCH v7 08/19] NFS: COPY handle ERR_OFFLOAD_DENIED
Date:   Mon, 16 Sep 2019 17:13:42 -0400
Message-Id: <20190916211353.18802-9-olga.kornievskaia@gmail.com>
In-Reply-To: <20190916211353.18802-1-olga.kornievskaia@gmail.com>
References: <20190916211353.18802-1-olga.kornievskaia@gmail.com>
Sender: linux-nfs-owner@vger.kernel.org
Precedence: bulk

From: Olga Kornievskaia <kolga@netapp.com>

If server sends ERR_OFFLOAD_DENIED error, the client must fall
back on doing copy the normal way. Return ENOTSUPP to the vfs and
fallback to regular copy.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
---
 fs/nfs/nfs42proc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index f8ebd77..705fe69 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -393,7 +393,8 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
 			args.sync = true;
 			dst_exception.retry = 1;
 			continue;
-		} else if (err == -ESTALE &&
+		} else if ((err == -ESTALE ||
+				err == -NFS4ERR_OFFLOAD_DENIED) &&
 				!nfs42_files_from_same_server(src, dst)) {
 			nfs42_do_offload_cancel_async(src, &args.src_stateid);
 			err = -EOPNOTSUPP;
-- 
1.8.3.1