// SPDX-License-Identifier: GPL-2.0
/*
 * sysctl_net_llc.c: sysctl interface to LLC net subsystem.
 *
 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 */

#include <linux/mm.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <net/net_namespace.h>
#include <net/llc.h>

static struct ctl_table llc2_timeout_table[] = {
        {
                .procname       = "ack",
                .data           = &sysctl_llc2_ack_timeout,
                .maxlen         = sizeof(sysctl_llc2_ack_timeout),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_jiffies,
        },
        {
                .procname       = "busy",
                .data           = &sysctl_llc2_busy_timeout,
                .maxlen         = sizeof(sysctl_llc2_busy_timeout),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_jiffies,
        },
        {
                .procname       = "p",
                .data           = &sysctl_llc2_p_timeout,
                .maxlen         = sizeof(sysctl_llc2_p_timeout),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_jiffies,
        },
        {
                .procname       = "rej",
                .data           = &sysctl_llc2_rej_timeout,
                .maxlen         = sizeof(sysctl_llc2_rej_timeout),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_jiffies,
        },
};

static struct ctl_table_header *llc2_timeout_header;
static struct ctl_table_header *llc_station_header;

int __init llc_sysctl_init(void)
{
        struct ctl_table empty[1] = {};
        llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table);
        llc_station_header = register_net_sysctl_sz(&init_net, "net/llc/station", empty, 0);

        if (!llc2_timeout_header || !llc_station_header) {
                llc_sysctl_exit();
                return -ENOMEM;
        }
        return 0;
}

void llc_sysctl_exit(void)
{
        if (llc2_timeout_header) {
                unregister_net_sysctl_table(llc2_timeout_header);
                llc2_timeout_header = NULL;
        }
        if (llc_station_header) {
                unregister_net_sysctl_table(llc_station_header);
                llc_station_header = NULL;
        }
}