NFS: COPY handle ERR_OFFLOAD_DENIED

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>

diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index 6ed5a16dc511f79b97ce11b924ed1579b0999037..50538b975aba3285415c40d5879437a112fbb783 100644 (file)
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -391,7 +391,8 @@ 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;