// 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-srv.h"

int rtrs_srv_reset_rdma_stats(struct rtrs_srv_stats *stats, bool enable)
{
        if (enable) {
                int cpu;
                struct rtrs_srv_stats_rdma_stats *r;

                for_each_possible_cpu(cpu) {
                        r = per_cpu_ptr(stats->rdma_stats, cpu);
                        memset(r, 0, sizeof(*r));
                }

                return 0;
        }

        return -EINVAL;
}

ssize_t rtrs_srv_stats_rdma_to_str(struct rtrs_srv_stats *stats, char *page)
{
        int cpu;
        struct rtrs_srv_stats_rdma_stats sum;
        struct rtrs_srv_stats_rdma_stats *r;

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

        for_each_possible_cpu(cpu) {
                r = per_cpu_ptr(stats->rdma_stats, cpu);

                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;
        }

        return sysfs_emit(page, "%llu %llu %llu %llu\n",
                          sum.dir[READ].cnt, sum.dir[READ].size_total,
                          sum.dir[WRITE].cnt, sum.dir[WRITE].size_total);
}