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Commit 116aeb88 authored by Steve Wise's avatar Steve Wise Committed by Jason Gunthorpe
Browse files

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: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent fbdb0a91

drivers/infiniband/hw/cxgb4/restrack.c

+84 −0
Original line number Diff line number Diff line
@@ -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 @@ static int fill_res_qp_entry(struct sk_buff *msg, 
	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,

};