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RDMA/restrack: Introduce statistic counter

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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: Mark Zhang <markz@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Mark Zhang 2019-07-02 13:02:31 +03:00 committed by Jason Gunthorpe
parent 5600a410ea
commit 7ade1ff96c
3 changed files with 39 additions and 5 deletions
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22
drivers/infiniband/core/restrack.c
View File

@ -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)

18
include/rdma/rdma_counter.h Normal file
View File

@ -0,0 +1,18 @@
/* 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_ */

4
include/rdma/restrack.h
View File

@ -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
*/