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nfs42: do not fail with EIO if ssc returns NFS4ERR_OFFLOAD_DENIED

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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>
This commit is contained in:
Tigran Mkrtchyan 2023-02-07 18:46:35 +01:00 committed by Anna Schumaker
parent 5bab56fff5
commit 4730515378
1 changed files with 2 additions and 1 deletions
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3
fs/nfs/nfs42proc.c
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@ -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;