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>

1 files changed, 16 insertions, 8 deletions

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 0793059b753a..8d09aa38fc83 100644
--- 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;
 }