sysctl_net_llc.c

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/*
 * sysctl_net_llc.c: sysctl interface to LLC net subsystem.
 *
 * Arnaldo Carvalho de Melo <[email protected]>
 */

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

#ifndef CONFIG_SYSCTL
#error This file should not be compiled without CONFIG_SYSCTL defined
#endif

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

static struct ctl_table llc_station_table[] = {
    { },
};

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

int __init llc_sysctl_init(void)
{
    llc2_timeout_header = register_net_sysctl(&init_net, "net/llc/llc2/timeout", llc2_timeout_table);
    llc_station_header = register_net_sysctl(&init_net, "net/llc/station", llc_station_table);

    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;
    }
}