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authorOlga Kornievskaia <kolga@netapp.com>2018-07-09 15:13:30 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2018-08-09 12:56:38 -0400
commit67aa7444c4beb40aafedd8d2c60bbcc54987adda (patch)
treee3306c3b336934f335295adb810141a9a5087b09 /fs/nfs/nfs42xdr.c
parentcb95deea0b4aa5c7c7423f4e075a3ddcd59e710b (diff)
downloadlinux-67aa7444c4beb40aafedd8d2c60bbcc54987adda.tar.bz2
NFS COPY xdr handle async reply
If server returns async reply, it must include a callback stateid, wr_callback_id in the write_response4. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/nfs42xdr.c')
-rw-r--r--fs/nfs/nfs42xdr.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index 09a540d035b8..205c3567ea08 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -389,21 +389,23 @@ static int decode_write_response(struct xdr_stream *xdr,
struct nfs42_write_res *res)
{
__be32 *p;
+ int status, count;
- p = xdr_inline_decode(xdr, 4 + 8 + 4);
+ p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
-
- /*
- * We never use asynchronous mode, so warn if a server returns
- * a stateid.
- */
- if (unlikely(*p != 0)) {
- pr_err_once("%s: server has set unrequested "
- "asynchronous mode\n", __func__);
+ count = be32_to_cpup(p);
+ if (count > 1)
return -EREMOTEIO;
+ else if (count == 1) {
+ status = decode_opaque_fixed(xdr, &res->stateid,
+ NFS4_STATEID_SIZE);
+ if (unlikely(status))
+ goto out_overflow;
}
- p++;
+ p = xdr_inline_decode(xdr, 8 + 4);
+ if (unlikely(!p))
+ goto out_overflow;
p = xdr_decode_hyper(p, &res->count);
res->verifier.committed = be32_to_cpup(p);
return decode_verifier(xdr, &res->verifier.verifier);