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nfsd4: allow space for final error return

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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>
This commit is contained in:
J. Bruce Fields 2014-03-07 11:01:37 -05:00
parent 07d1f80207
commit 5f4ab94587
1 changed files with 7 additions and 2 deletions
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9
fs/nfsd/nfs4xdr.c
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@ -3636,6 +3636,7 @@ void
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 @@ nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
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) {