iw_cxgb4: provide detailed provider-specific CM_ID information

Add a table of important fields from the c4iw_ep* structures to the cm_id
resource tracking table.  This is helpful in debugging.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/cxgb4/restrack.c b/drivers/infiniband/hw/cxgb4/restrack.c
index b9724d0..463ef58 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/restrack.c
+++ b/drivers/infiniband/hw/cxgb4/restrack.c
@@ -30,6 +30,8 @@
  * SOFTWARE.
  */
 
+#include <rdma/rdma_cm.h>
+
 #include "iw_cxgb4.h"
 #include <rdma/restrack.h>
 #include <uapi/rdma/rdma_netlink.h>
@@ -188,6 +190,88 @@ err:
        return -EMSGSIZE;
 }
 
+union union_ep {
+       struct c4iw_listen_ep lep;
+       struct c4iw_ep ep;
+};
+
+static int fill_res_ep_entry(struct sk_buff *msg,
+                            struct rdma_restrack_entry *res)
+{
+       struct rdma_cm_id *cm_id = rdma_res_to_id(res);
+       struct nlattr *table_attr;
+       struct c4iw_ep_common *epcp;
+       struct c4iw_listen_ep *listen_ep = NULL;
+       struct c4iw_ep *ep = NULL;
+       struct iw_cm_id *iw_cm_id;
+       union union_ep *uep;
+
+       iw_cm_id = rdma_iw_cm_id(cm_id);
+       if (!iw_cm_id)
+               return 0;
+       epcp = (struct c4iw_ep_common *)iw_cm_id->provider_data;
+       if (!epcp)
+               return 0;
+       uep = kcalloc(1, sizeof(*uep), GFP_KERNEL);
+       if (!uep)
+               return 0;
+
+       table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_DRIVER);
+       if (!table_attr)
+               goto err_free_uep;
+
+       /* Get a consistent snapshot */
+       mutex_lock(&epcp->mutex);
+       if (epcp->state == LISTEN) {
+               uep->lep = *(struct c4iw_listen_ep *)epcp;
+               mutex_unlock(&epcp->mutex);
+               listen_ep = &uep->lep;
+               epcp = &listen_ep->com;
+       } else {
+               uep->ep = *(struct c4iw_ep *)epcp;
+               mutex_unlock(&epcp->mutex);
+               ep = &uep->ep;
+               epcp = &ep->com;
+       }
+
+       if (rdma_nl_put_driver_u32(msg, "state", epcp->state))
+               goto err_cancel_table;
+       if (rdma_nl_put_driver_u64_hex(msg, "flags", epcp->flags))
+               goto err_cancel_table;
+       if (rdma_nl_put_driver_u64_hex(msg, "history", epcp->history))
+               goto err_cancel_table;
+
+       if (epcp->state == LISTEN) {
+               if (rdma_nl_put_driver_u32(msg, "stid", listen_ep->stid))
+                       goto err_cancel_table;
+               if (rdma_nl_put_driver_u32(msg, "backlog", listen_ep->backlog))
+                       goto err_cancel_table;
+       } else {
+               if (rdma_nl_put_driver_u32(msg, "hwtid", ep->hwtid))
+                       goto err_cancel_table;
+               if (rdma_nl_put_driver_u32(msg, "ord", ep->ord))
+                       goto err_cancel_table;
+               if (rdma_nl_put_driver_u32(msg, "ird", ep->ird))
+                       goto err_cancel_table;
+               if (rdma_nl_put_driver_u32(msg, "emss", ep->emss))
+                       goto err_cancel_table;
+
+               if (!ep->parent_ep && rdma_nl_put_driver_u32(msg, "atid",
+                                                            ep->atid))
+                       goto err_cancel_table;
+       }
+       nla_nest_end(msg, table_attr);
+       kfree(uep);
+       return 0;
+
+err_cancel_table:
+       nla_nest_cancel(msg, table_attr);
+err_free_uep:
+       kfree(uep);
+       return -EMSGSIZE;
+}
+
 c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX] = {
        [RDMA_RESTRACK_QP]      = fill_res_qp_entry,
+       [RDMA_RESTRACK_CM_ID]   = fill_res_ep_entry,
 };