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// 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_sess *sess = to_clt_sess(con->c.sess);
struct rtrs_clt_stats *stats = sess->stats;
struct rtrs_clt_stats_pcpu *s;
int cpu;
cpu = raw_smp_processor_id();
s = this_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);
}
}
void rtrs_clt_inc_failover_cnt(struct rtrs_clt_stats *stats)
{
struct rtrs_clt_stats_pcpu *s;
s = this_cpu_ptr(stats->pcpu_stats);
s->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;
sum.dir[READ].cnt += r->dir[READ].cnt;
sum.dir[READ].size_total += r->dir[READ].size_total;
sum.dir[WRITE].cnt += r->dir[WRITE].cnt;
sum.dir[WRITE].size_total += r->dir[WRITE].size_total;
sum.failover_cnt += r->failover_cnt;
}
return sysfs_emit(page, "%llu %llu %llu %llu %u %llu\n",
sum.dir[READ].cnt, sum.dir[READ].size_total,
sum.dir[WRITE].cnt, sum.dir[WRITE].size_total,
atomic_read(&stats->inflight), sum.failover_cnt);
}
ssize_t rtrs_clt_reset_all_help(struct rtrs_clt_stats *s, char *page)
{
return sysfs_emit(page, "echo 1 to reset all statistics\n");
}
int rtrs_clt_reset_rdma_stats(struct rtrs_clt_stats *stats, bool enable)
{
struct rtrs_clt_stats_pcpu *s;
int cpu;
if (!enable)
return -EINVAL;
for_each_possible_cpu(cpu) {
s = per_cpu_ptr(stats->pcpu_stats, cpu);
memset(&s->rdma, 0, sizeof(s->rdma));
}
return 0;
}
int rtrs_clt_reset_cpu_migr_stats(struct rtrs_clt_stats *stats, bool enable)
{
struct rtrs_clt_stats_pcpu *s;
int cpu;
if (!enable)
return -EINVAL;
for_each_possible_cpu(cpu) {
s = per_cpu_ptr(stats->pcpu_stats, cpu);
memset(&s->cpu_migr, 0, sizeof(s->cpu_migr));
}
return 0;
}
int rtrs_clt_reset_reconnects_stat(struct rtrs_clt_stats *stats, bool enable)
{
if (!enable)
return -EINVAL;
memset(&stats->reconnects, 0, sizeof(stats->reconnects));
return 0;
}
int rtrs_clt_reset_all_stats(struct rtrs_clt_stats *s, bool enable)
{
if (enable) {
rtrs_clt_reset_rdma_stats(s, enable);
rtrs_clt_reset_cpu_migr_stats(s, enable);
rtrs_clt_reset_reconnects_stat(s, enable);
atomic_set(&s->inflight, 0);
return 0;
}
return -EINVAL;
}
static inline void rtrs_clt_update_rdma_stats(struct rtrs_clt_stats *stats,
size_t size, int d)
{
struct rtrs_clt_stats_pcpu *s;
s = this_cpu_ptr(stats->pcpu_stats);
s->rdma.dir[d].cnt++;
s->rdma.dir[d].size_total += size;
}
void rtrs_clt_update_all_stats(struct rtrs_clt_io_req *req, int dir)
{
struct rtrs_clt_con *con = req->con;
struct rtrs_clt_sess *sess = to_clt_sess(con->c.sess);
struct rtrs_clt_stats *stats = sess->stats;
unsigned int len;
len = req->usr_len + req->data_len;
rtrs_clt_update_rdma_stats(stats, len, dir);
if (req->mp_policy == MP_POLICY_MIN_INFLIGHT)
atomic_inc(&stats->inflight);
}
int rtrs_clt_init_stats(struct rtrs_clt_stats *stats)
{
stats->pcpu_stats = alloc_percpu(typeof(*stats->pcpu_stats));
if (!stats->pcpu_stats)
return -ENOMEM;
/*
* successful_cnt will be set to 0 after session
* is established for the first time
*/
stats->reconnects.successful_cnt = -1;
return 0;
}
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