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Commit 7ade1ff9 authored by Mark Zhang's avatar Mark Zhang Committed by Jason Gunthorpe
Browse files

RDMA/restrack: Introduce statistic counter 



Introduce statistic counter as a new resource. It allows a user to monitor
specific objects (e.g., QPs) by binding to a counter.

In some cases a user counter resource is created with task other then
"current", because its creation is done as part of rdmatool call.

Signed-off-by: default avatarMark Zhang <markz@mellanox.com>
Reviewed-by: default avatarMajd Dibbiny <majd@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 5600a410

drivers/infiniband/core/restrack.c

+17 −5
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include <rdma/rdma_cm.h>

#include <rdma/ib_verbs.h>

#include <rdma/restrack.h>

#include <rdma/rdma_counter.h>

#include <linux/mutex.h>

#include <linux/sched/task.h>

#include <linux/pid_namespace.h>
@@ -45,6 +46,7 @@ static const char *type2str(enum rdma_restrack_type type) 
		[RDMA_RESTRACK_CM_ID] = "CM_ID",

		[RDMA_RESTRACK_MR] = "MR",

		[RDMA_RESTRACK_CTX] = "CTX",

		[RDMA_RESTRACK_COUNTER] = "COUNTER",

	};



	return names[type];
@@ -169,6 +171,8 @@ static struct ib_device *res_to_dev(struct rdma_restrack_entry *res) 
		return container_of(res, struct ib_mr, res)->device;

	case RDMA_RESTRACK_CTX:

		return container_of(res, struct ib_ucontext, res)->device;

	case RDMA_RESTRACK_COUNTER:

		return container_of(res, struct rdma_counter, res)->device;

	default:

		WARN_ONCE(true, "Wrong resource tracking type %u\n", res->type);

		return NULL;
@@ -203,15 +207,22 @@ static void rdma_restrack_add(struct rdma_restrack_entry *res) 


	kref_init(&res->kref);

	init_completion(&res->comp);

	if (res->type != RDMA_RESTRACK_QP)

		ret = xa_alloc_cyclic(&rt->xa, &res->id, res, xa_limit_32b,

				&rt->next_id, GFP_KERNEL);

	else {

	if (res->type == RDMA_RESTRACK_QP) {

		/* Special case to ensure that LQPN points to right QP */

		struct ib_qp *qp = container_of(res, struct ib_qp, res);



		ret = xa_insert(&rt->xa, qp->qp_num, res, GFP_KERNEL);

		res->id = ret ? 0 : qp->qp_num;

	} else if (res->type == RDMA_RESTRACK_COUNTER) {

		/* Special case to ensure that cntn points to right counter */

		struct rdma_counter *counter;



		counter = container_of(res, struct rdma_counter, res);

		ret = xa_insert(&rt->xa, counter->id, res, GFP_KERNEL);

		res->id = ret ? 0 : counter->id;

	} else {

		ret = xa_alloc_cyclic(&rt->xa, &res->id, res, xa_limit_32b,

				      &rt->next_id, GFP_KERNEL);

	}



	if (!ret)
@@ -237,7 +248,8 @@ EXPORT_SYMBOL(rdma_restrack_kadd); 
 */

void rdma_restrack_uadd(struct rdma_restrack_entry *res)

{

	if (res->type != RDMA_RESTRACK_CM_ID)

	if ((res->type != RDMA_RESTRACK_CM_ID) &&

	    (res->type != RDMA_RESTRACK_COUNTER))

		res->task = NULL;



	if (!res->task)

include/rdma/rdma_counter.h

0 → 100644
+18 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */

/*

 * Copyright (c) 2019 Mellanox Technologies. All rights reserved.

 */



#ifndef _RDMA_COUNTER_H_

#define _RDMA_COUNTER_H_



#include <rdma/ib_verbs.h>

#include <rdma/restrack.h>



struct rdma_counter {

	struct rdma_restrack_entry	res;

	struct ib_device		*device;

	uint32_t			id;

	u8				port;

};

#endif /* _RDMA_COUNTER_H_ */

include/rdma/restrack.h

+4 −0
Original line number Diff line number Diff line
@@ -42,6 +42,10 @@ enum rdma_restrack_type { 
	 * @RDMA_RESTRACK_CTX: Verbs contexts (CTX)

	 */

	RDMA_RESTRACK_CTX,

	/**

	 * @RDMA_RESTRACK_COUNTER: Statistic Counter

	 */

	RDMA_RESTRACK_COUNTER,

	/**

	 * @RDMA_RESTRACK_MAX: Last entry, used for array dclarations

	 */