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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * RDMA Transport Layer
   4  *
   5  * Copyright (c) 2014 - 2018 ProfitBricks GmbH. All rights reserved.
   6  * Copyright (c) 2018 - 2019 1&1 IONOS Cloud GmbH. All rights reserved.
   7  * Copyright (c) 2019 - 2020 1&1 IONOS SE. All rights reserved.
   8  */
   9 #undef pr_fmt
  10 #define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
  11
  12 #include "rtrs-srv.h"
  13
  14 int rtrs_srv_reset_rdma_stats(struct rtrs_srv_stats *stats, bool enable)
  15 {
  16         if (enable) {
  17                 int cpu;
  18                 struct rtrs_srv_stats_rdma_stats *r;
  19
  20                 for_each_possible_cpu(cpu) {
  21                         r = per_cpu_ptr(stats->rdma_stats, cpu);
  22                         memset(r, 0, sizeof(*r));
  23                 }
  24
  25                 return 0;
  26         }
  27
  28         return -EINVAL;
  29 }
  30
  31 ssize_t rtrs_srv_stats_rdma_to_str(struct rtrs_srv_stats *stats, char *page)
  32 {
  33         int cpu;
  34         struct rtrs_srv_stats_rdma_stats sum;
  35         struct rtrs_srv_stats_rdma_stats *r;
  36
  37         memset(&sum, 0, sizeof(sum));
  38
  39         for_each_possible_cpu(cpu) {
  40                 r = per_cpu_ptr(stats->rdma_stats, cpu);
  41
  42                 sum.dir[READ].cnt         += r->dir[READ].cnt;
  43                 sum.dir[READ].size_total  += r->dir[READ].size_total;
  44                 sum.dir[WRITE].cnt        += r->dir[WRITE].cnt;
  45                 sum.dir[WRITE].size_total += r->dir[WRITE].size_total;
  46         }
  47
  48         return sysfs_emit(page, "%llu %llu %llu %llu\n",
  49                           sum.dir[READ].cnt, sum.dir[READ].size_total,
  50                           sum.dir[WRITE].cnt, sum.dir[WRITE].size_total);
  51 }