IB/mlx4: Return receive queue sizes for userspace QPs from query QP

Return the receive queue sizes for both userspace QPs and kernel Qps
(not just kernel QPs) from mlx4_ib_query_qp().  Also zero the send
queue sizes for userspace QPs to avoid a possible information leak,
and set the max_inline_data for kernel QPs to 0 since inline sends are
not supported for kernel QPs.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 0793059..8d09aa3 100644 (file)
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1581,17 +1581,25 @@ int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr
 
 done:
        qp_attr->cur_qp_state        = qp_attr->qp_state;
+       qp_attr->cap.max_recv_wr     = qp->rq.wqe_cnt;
+       qp_attr->cap.max_recv_sge    = qp->rq.max_gs;
+
        if (!ibqp->uobject) {
-               qp_attr->cap.max_send_wr     = qp->sq.wqe_cnt;
-               qp_attr->cap.max_recv_wr     = qp->rq.wqe_cnt;
-               qp_attr->cap.max_send_sge    = qp->sq.max_gs;
-               qp_attr->cap.max_recv_sge    = qp->rq.max_gs;
-               qp_attr->cap.max_inline_data = (1 << qp->sq.wqe_shift) -
-                       send_wqe_overhead(qp->ibqp.qp_type) -
-                       sizeof (struct mlx4_wqe_inline_seg);
-               qp_init_attr->cap            = qp_attr->cap;
+               qp_attr->cap.max_send_wr  = qp->sq.wqe_cnt;
+               qp_attr->cap.max_send_sge = qp->sq.max_gs;
+       } else {
+               qp_attr->cap.max_send_wr  = 0;
+               qp_attr->cap.max_send_sge = 0;
        }
 
+       /*
+        * We don't support inline sends for kernel QPs (yet), and we
+        * don't know what userspace's value should be.
+        */
+       qp_attr->cap.max_inline_data = 0;
+
+       qp_init_attr->cap            = qp_attr->cap;
+
        return 0;
 }