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NFS: for "inter" copy treat ESTALE as ENOTSUPP 

If the client sends an "inter" copy to the destination server but
it only supports "intra" copy, it can return ESTALE (since it
doesn't know anything about the file handle from the other server
and does not recognize the special case of "inter" copy). Translate
this error as ENOTSUPP and also send OFFLOAD_CANCEL to the source
server so that it can clean up state.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
This commit is contained in:
Olga Kornievskaia 2017-09-25 15:59:44 -04:00 committed by Olga Kornievskaia
parent 0b9018b9ca
commit 7e350197a1
1 changed files with 5 additions and 0 deletions
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5
fs/nfs/nfs42proc.c
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@ -391,6 +391,11 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
args.sync = true;
dst_exception.retry = 1;
continue;
} else if (err == -ESTALE &&
!nfs42_files_from_same_server(src, dst)) {
nfs42_do_offload_cancel_async(src, &args.src_stateid);
err = -EOPNOTSUPP;
break;
}
err2 = nfs4_handle_exception(server, err, &src_exception);