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Diffstat (limited to 'drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c')
-rw-r--r--drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c198
1 files changed, 198 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c b/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c
new file mode 100644
index 000000000..1e6ffafa2
--- /dev/null
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt-stats.c
@@ -0,0 +1,198 @@
+// 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;
+
+ 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)
+{
+ this_cpu_inc(stats->pcpu_stats->rdma.dir[d].cnt);
+ this_cpu_add(stats->pcpu_stats->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_path *clt_path = to_clt_path(con->c.path);
+ struct rtrs_clt_stats *stats = clt_path->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;
+}