// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
 */
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/init.h>
#include <net/ax25.h>
#include <net/netrom.h>

/*
 *      Values taken from NET/ROM documentation.
 */
static int min_quality[] = {0}, max_quality[] = {255};
static int min_obs[]     = {0}, max_obs[]     = {255};
static int min_ttl[]     = {0}, max_ttl[]     = {255};
static int min_t1[]      = {5 * HZ};
static int max_t1[]      = {600 * HZ};
static int min_n2[]      = {2}, max_n2[]      = {127};
static int min_t2[]      = {1 * HZ};
static int max_t2[]      = {60 * HZ};
static int min_t4[]      = {1 * HZ};
static int max_t4[]      = {1000 * HZ};
static int min_window[]  = {1}, max_window[]  = {127};
static int min_idle[]    = {0 * HZ};
static int max_idle[]    = {65535 * HZ};
static int min_route[]   = {0}, max_route[]   = {1};
static int min_fails[]   = {1}, max_fails[]   = {10};
static int min_reset[]   = {0}, max_reset[]   = {1};

static struct ctl_table_header *nr_table_header;

static struct ctl_table nr_table[] = {
        {
                .procname       = "default_path_quality",
                .data           = &sysctl_netrom_default_path_quality,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_quality,
                .extra2         = &max_quality
        },
        {
                .procname       = "obsolescence_count_initialiser",
                .data           = &sysctl_netrom_obsolescence_count_initialiser,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_obs,
                .extra2         = &max_obs
        },
        {
                .procname       = "network_ttl_initialiser",
                .data           = &sysctl_netrom_network_ttl_initialiser,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_ttl,
                .extra2         = &max_ttl
        },
        {
                .procname       = "transport_timeout",
                .data           = &sysctl_netrom_transport_timeout,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_t1,
                .extra2         = &max_t1
        },
        {
                .procname       = "transport_maximum_tries",
                .data           = &sysctl_netrom_transport_maximum_tries,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_n2,
                .extra2         = &max_n2
        },
        {
                .procname       = "transport_acknowledge_delay",
                .data           = &sysctl_netrom_transport_acknowledge_delay,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_t2,
                .extra2         = &max_t2
        },
        {
                .procname       = "transport_busy_delay",
                .data           = &sysctl_netrom_transport_busy_delay,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_t4,
                .extra2         = &max_t4
        },
        {
                .procname       = "transport_requested_window_size",
                .data           = &sysctl_netrom_transport_requested_window_size,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_window,
                .extra2         = &max_window
        },
        {
                .procname       = "transport_no_activity_timeout",
                .data           = &sysctl_netrom_transport_no_activity_timeout,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_idle,
                .extra2         = &max_idle
        },
        {
                .procname       = "routing_control",
                .data           = &sysctl_netrom_routing_control,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_route,
                .extra2         = &max_route
        },
        {
                .procname       = "link_fails_count",
                .data           = &sysctl_netrom_link_fails_count,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_fails,
                .extra2         = &max_fails
        },
        {
                .procname       = "reset",
                .data           = &sysctl_netrom_reset_circuit,
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = proc_dointvec_minmax,
                .extra1         = &min_reset,
                .extra2         = &max_reset
        },
};

int __init nr_register_sysctl(void)
{
        nr_table_header = register_net_sysctl(&init_net, "net/netrom", nr_table);
        if (!nr_table_header)
                return -ENOMEM;
        return 0;
}

void nr_unregister_sysctl(void)
{
        unregister_net_sysctl_table(nr_table_header);
}