Merge tag 'nfsd-4.7' of git://linux-nfs.org/~bfields/linux

Pull nfsd updates from Bruce Fields:
 "A very quiet cycle for nfsd, mainly just an RDMA update from Chuck
  Lever"

* tag 'nfsd-4.7' of git://linux-nfs.org/~bfields/linux:
  sunrpc: fix stripping of padded MIC tokens
  svcrpc: autoload rdma module
  svcrdma: Generalize svc_rdma_xdr_decode_req()
  svcrdma: Eliminate code duplication in svc_rdma_recvfrom()
  svcrdma: Drain QP before freeing svcrdma_xprt
  svcrdma: Post Receives only for forward channel requests
  svcrdma: Remove superfluous line from rdma_read_chunks()
  svcrdma: svc_rdma_put_context() is invoked twice in Send error path
  svcrdma: Do not add XDR padding to xdr_buf page vector
  svcrdma: Support IPv6 with NFS/RDMA
  nfsd: handle seqid wraparound in nfsd4_preprocess_layout_stateid
  Remove unnecessary allocation

1 files changed, 8 insertions, 26 deletions

diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index fbe7444e7de6..2c25606f2561 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -447,10 +447,8 @@ static int rdma_read_chunks(struct svcxprt_rdma *xprt,
 	head->arg.len = rqstp->rq_arg.len;
 	head->arg.buflen = rqstp->rq_arg.buflen;
 
-	ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0];
-	position = be32_to_cpu(ch->rc_position);
-
 	/* RDMA_NOMSG: RDMA READ data should land just after RDMA RECV data */
+	position = be32_to_cpu(ch->rc_position);
 	if (position == 0) {
 		head->arg.pages = &head->pages[0];
 		page_offset = head->byte_len;
@@ -488,7 +486,7 @@ static int rdma_read_chunks(struct svcxprt_rdma *xprt,
 	if (page_offset & 3) {
 		u32 pad = 4 - (page_offset & 3);
 
-		head->arg.page_len += pad;
+		head->arg.tail[0].iov_len += pad;
 		head->arg.len += pad;
 		head->arg.buflen += pad;
 		page_offset += pad;
@@ -510,11 +508,10 @@ static int rdma_read_chunks(struct svcxprt_rdma *xprt,
 	return ret;
 }
 
-static int rdma_read_complete(struct svc_rqst *rqstp,
-			      struct svc_rdma_op_ctxt *head)
+static void rdma_read_complete(struct svc_rqst *rqstp,
+			       struct svc_rdma_op_ctxt *head)
 {
 	int page_no;
-	int ret;
 
 	/* Copy RPC pages */
 	for (page_no = 0; page_no < head->count; page_no++) {
@@ -550,23 +547,6 @@ static int rdma_read_complete(struct svc_rqst *rqstp,
 	rqstp->rq_arg.tail[0] = head->arg.tail[0];
 	rqstp->rq_arg.len = head->arg.len;
 	rqstp->rq_arg.buflen = head->arg.buflen;
-
-	/* Free the context */
-	svc_rdma_put_context(head, 0);
-
-	/* XXX: What should this be? */
-	rqstp->rq_prot = IPPROTO_MAX;
-	svc_xprt_copy_addrs(rqstp, rqstp->rq_xprt);
-
-	ret = rqstp->rq_arg.head[0].iov_len
-		+ rqstp->rq_arg.page_len
-		+ rqstp->rq_arg.tail[0].iov_len;
-	dprintk("svcrdma: deferred read ret=%d, rq_arg.len=%u, "
-		"rq_arg.head[0].iov_base=%p, rq_arg.head[0].iov_len=%zu\n",
-		ret, rqstp->rq_arg.len,	rqstp->rq_arg.head[0].iov_base,
-		rqstp->rq_arg.head[0].iov_len);
-
-	return ret;
 }
 
 /* By convention, backchannel calls arrive via rdma_msg type
@@ -624,7 +604,8 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
 				  dto_q);
 		list_del_init(&ctxt->dto_q);
 		spin_unlock_bh(&rdma_xprt->sc_rq_dto_lock);
-		return rdma_read_complete(rqstp, ctxt);
+		rdma_read_complete(rqstp, ctxt);
+		goto complete;
 	} else if (!list_empty(&rdma_xprt->sc_rq_dto_q)) {
 		ctxt = list_entry(rdma_xprt->sc_rq_dto_q.next,
 				  struct svc_rdma_op_ctxt,
@@ -655,7 +636,7 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
 
 	/* Decode the RDMA header. */
 	rmsgp = (struct rpcrdma_msg *)rqstp->rq_arg.head[0].iov_base;
-	ret = svc_rdma_xdr_decode_req(rmsgp, rqstp);
+	ret = svc_rdma_xdr_decode_req(&rqstp->rq_arg);
 	if (ret < 0)
 		goto out_err;
 	if (ret == 0)
@@ -682,6 +663,7 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
 		return 0;
 	}
 
+complete:
 	ret = rqstp->rq_arg.head[0].iov_len
 		+ rqstp->rq_arg.page_len
 		+ rqstp->rq_arg.tail[0].iov_len;