drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c

Source file repositories/reference/linux-study-clean/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c

File Facts

System
Linux kernel
Corpus path
drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c
Extension
.c
Size
4761 bytes
Lines
199
Domain
Driver Families
Bucket
drivers/infiniband
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * RDMA Transport Layer
 *
 * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
 * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
 * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
 */
#undef pr_fmt
#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt

#include "rtrs-clt.h"

void rtrs_clt_update_wc_stats(struct rtrs_clt_con *con)
{
	struct rtrs_clt_path *clt_path = to_clt_path(con->c.path);
	struct rtrs_clt_stats *stats = clt_path->stats;
	struct rtrs_clt_stats_pcpu *s;
	int cpu;

	cpu = raw_smp_processor_id();
	s = get_cpu_ptr(stats->pcpu_stats);
	if (con->cpu != cpu) {
		s->cpu_migr.to++;

		/* Careful here, override s pointer */
		s = per_cpu_ptr(stats->pcpu_stats, con->cpu);
		atomic_inc(&s->cpu_migr.from);
	}
	put_cpu_ptr(stats->pcpu_stats);
}

void rtrs_clt_inc_failover_cnt(struct rtrs_clt_stats *stats)
{
	this_cpu_inc(stats->pcpu_stats->rdma.failover_cnt);
}

int rtrs_clt_stats_migration_from_cnt_to_str(struct rtrs_clt_stats *stats, char *buf)
{
	struct rtrs_clt_stats_pcpu *s;

	size_t used;
	int cpu;

	used = 0;
	for_each_possible_cpu(cpu) {
		s = per_cpu_ptr(stats->pcpu_stats, cpu);
		used += sysfs_emit_at(buf, used, "%d ",
				  atomic_read(&s->cpu_migr.from));
	}

	used += sysfs_emit_at(buf, used, "\n");

	return used;
}

int rtrs_clt_stats_migration_to_cnt_to_str(struct rtrs_clt_stats *stats, char *buf)
{
	struct rtrs_clt_stats_pcpu *s;

	size_t used;
	int cpu;

	used = 0;
	for_each_possible_cpu(cpu) {
		s = per_cpu_ptr(stats->pcpu_stats, cpu);
		used += sysfs_emit_at(buf, used, "%d ", s->cpu_migr.to);
	}

	used += sysfs_emit_at(buf, used, "\n");

	return used;
}

int rtrs_clt_stats_reconnects_to_str(struct rtrs_clt_stats *stats, char *buf)
{
	return sysfs_emit(buf, "%d %d\n", stats->reconnects.successful_cnt,
			  stats->reconnects.fail_cnt);
}

ssize_t rtrs_clt_stats_rdma_to_str(struct rtrs_clt_stats *stats, char *page)
{
	struct rtrs_clt_stats_rdma sum;
	struct rtrs_clt_stats_rdma *r;
	int cpu;

	memset(&sum, 0, sizeof(sum));

	for_each_possible_cpu(cpu) {
		r = &per_cpu_ptr(stats->pcpu_stats, cpu)->rdma;

Annotation

Implementation Notes