SVCRDMA: remove faulty assertions in rpc/rdma chunk validation.

Certain client-provided RPCRDMA chunk alignments result in an
additional scatter/gather entry, which triggered nfs/rdma server
assertions incorrectly. OpenSolaris nfs/rdma client connectathon
testing was blocked by these in the special/locking section.

Signed-off-by: Tom Talpey <tmtalpey@gmail.com>
Cc: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
index a3334e3..d0bea98 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c
@@ -191,7 +191,6 @@ static int map_xdr(struct svcxprt_rdma *xprt,
                   struct xdr_buf *xdr,
                   struct svc_rdma_req_map *vec)
 {
-       int sge_max = (xdr->len+PAGE_SIZE-1) / PAGE_SIZE + 3;
        int sge_no;
        u32 sge_bytes;
        u32 page_bytes;
@@ -235,7 +234,11 @@ static int map_xdr(struct svcxprt_rdma *xprt,
                sge_no++;
        }
 
-       BUG_ON(sge_no > sge_max);
+       dprintk("svcrdma: map_xdr: sge_no %d page_no %d "
+               "page_base %zd page_len %zd head_len %d tail_len %d\n",
+               sge_no, page_no, xdr->page_base, xdr->page_len,
+               xdr->head[0].iov_len, xdr->tail[0].iov_len);
+
        vec->count = sge_no;
        return 0;
 }
@@ -579,7 +582,6 @@ static int send_reply(struct svcxprt_rdma *rdma,
                        ctxt->sge[page_no+1].length = 0;
        }
        BUG_ON(sge_no > rdma->sc_max_sge);
-       BUG_ON(sge_no > ctxt->count);
        memset(&send_wr, 0, sizeof send_wr);
        ctxt->wr_op = IB_WR_SEND;
        send_wr.wr_id = (unsigned long)ctxt;