nfsd4: allow space for final error return
This post-encoding check should be taking into account the need to
encode at least an out-of-space error to the following op (if any).
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 24ba652..2ed8036 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3636,6 +3636,7 @@
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
struct nfs4_stateowner *so = resp->cstate.replay_owner;
+ struct svc_rqst *rqstp = resp->rqstp;
__be32 *statp;
nfsd4_enc encoder;
__be32 *p;
@@ -3652,8 +3653,12 @@
encoder = nfsd4_enc_ops[op->opnum];
op->status = encoder(resp, op->status, &op->u);
/* nfsd4_check_resp_size guarantees enough room for error status */
- if (!op->status)
- op->status = nfsd4_check_resp_size(resp, 0);
+ if (!op->status) {
+ int space_needed = 0;
+ if (!nfsd4_last_compound_op(rqstp))
+ space_needed = COMPOUND_ERR_SLACK_SPACE;
+ op->status = nfsd4_check_resp_size(resp, space_needed);
+ }
if (op->status == nfserr_resource ||
op->status == nfserr_rep_too_big ||
op->status == nfserr_rep_too_big_to_cache) {