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root/net/ax25/sysctl_net_ax25.c

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DEFINITIONS

This source file includes following definitions.
  1. ax25_register_sysctl
  2. ax25_unregister_sysctl

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
 */
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/spinlock.h>
#include <net/ax25.h>

static int min_ipdefmode[1],            max_ipdefmode[] = {1};
static int min_axdefmode[1],            max_axdefmode[] = {1};
static int min_backoff[1],              max_backoff[] = {2};
static int min_conmode[1],              max_conmode[] = {2};
static int min_window[] = {1},          max_window[] = {7};
static int min_ewindow[] = {1},         max_ewindow[] = {63};
static int min_t1[] = {1},              max_t1[] = {30000};
static int min_t2[] = {1},              max_t2[] = {20000};
static int min_t3[1],                   max_t3[] = {3600000};
static int min_idle[1],                 max_idle[] = {65535000};
static int min_n2[] = {1},              max_n2[] = {31};
static int min_paclen[] = {1},          max_paclen[] = {512};
static int min_proto[1],                max_proto[] = { AX25_PROTO_MAX };
static int min_ds_timeout[1],           max_ds_timeout[] = {65535000};

static struct ctl_table_header *ax25_table_header;

static ctl_table *ax25_table;
static int ax25_table_size;

static struct ctl_path ax25_path[] = {
        { .procname = "net", .ctl_name = CTL_NET, },
        { .procname = "ax25", .ctl_name = NET_AX25, },
        { }
};

static const ctl_table ax25_param_table[] = {
        {
                .ctl_name       = NET_AX25_IP_DEFAULT_MODE,
                .procname       = "ip_default_mode",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_ipdefmode,
                .extra2         = &max_ipdefmode
        },
        {
                .ctl_name       = NET_AX25_DEFAULT_MODE,
                .procname       = "ax25_default_mode",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_axdefmode,
                .extra2         = &max_axdefmode
        },
        {
                .ctl_name       = NET_AX25_BACKOFF_TYPE,
                .procname       = "backoff_type",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_backoff,
                .extra2         = &max_backoff
        },
        {
                .ctl_name       = NET_AX25_CONNECT_MODE,
                .procname       = "connect_mode",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_conmode,
                .extra2         = &max_conmode
        },
        {
                .ctl_name       = NET_AX25_STANDARD_WINDOW,
                .procname       = "standard_window_size",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_window,
                .extra2         = &max_window
        },
        {
                .ctl_name       = NET_AX25_EXTENDED_WINDOW,
                .procname       = "extended_window_size",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_ewindow,
                .extra2         = &max_ewindow
        },
        {
                .ctl_name       = NET_AX25_T1_TIMEOUT,
                .procname       = "t1_timeout",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_t1,
                .extra2         = &max_t1
        },
        {
                .ctl_name       = NET_AX25_T2_TIMEOUT,
                .procname       = "t2_timeout",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_t2,
                .extra2         = &max_t2
        },
        {
                .ctl_name       = NET_AX25_T3_TIMEOUT,
                .procname       = "t3_timeout",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_t3,
                .extra2         = &max_t3
        },
        {
                .ctl_name       = NET_AX25_IDLE_TIMEOUT,
                .procname       = "idle_timeout",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_idle,
                .extra2         = &max_idle
        },
        {
                .ctl_name       = NET_AX25_N2,
                .procname       = "maximum_retry_count",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_n2,
                .extra2         = &max_n2
        },
        {
                .ctl_name       = NET_AX25_PACLEN,
                .procname       = "maximum_packet_length",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_paclen,
                .extra2         = &max_paclen
        },
        {
                .ctl_name       = NET_AX25_PROTOCOL,
                .procname       = "protocol",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_proto,
                .extra2         = &max_proto
        },
#ifdef CONFIG_AX25_DAMA_SLAVE
        {
                .ctl_name       = NET_AX25_DAMA_SLAVE_TIMEOUT,
                .procname       = "dama_slave_timeout",
                .maxlen         = sizeof(int),
                .mode           = 0644,
                .proc_handler   = &proc_dointvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_ds_timeout,
                .extra2         = &max_ds_timeout
        },
#endif

        { .ctl_name = 0 }       /* that's all, folks! */
};

void ax25_register_sysctl(void)
{
        ax25_dev *ax25_dev;
        int n, k;

        spin_lock_bh(&ax25_dev_lock);
        for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
                ax25_table_size += sizeof(ctl_table);

        if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) {
                spin_unlock_bh(&ax25_dev_lock);
                return;
        }

        for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
                struct ctl_table *child = kmemdup(ax25_param_table,
                                                  sizeof(ax25_param_table),
                                                  GFP_ATOMIC);
                if (!child) {
                        while (n--)
                                kfree(ax25_table[n].child);
                        kfree(ax25_table);
                        spin_unlock_bh(&ax25_dev_lock);
                        return;
                }
                ax25_table[n].child = ax25_dev->systable = child;
                ax25_table[n].ctl_name     = n + 1;
                ax25_table[n].procname     = ax25_dev->dev->name;
                ax25_table[n].mode         = 0555;

                child[AX25_MAX_VALUES].ctl_name = 0;    /* just in case... */

                for (k = 0; k < AX25_MAX_VALUES; k++)
                        child[k].data = &ax25_dev->values[k];

                n++;
        }
        spin_unlock_bh(&ax25_dev_lock);

        ax25_table_header = register_sysctl_paths(ax25_path, ax25_table);
}

void ax25_unregister_sysctl(void)
{
        ctl_table *p;
        unregister_sysctl_table(ax25_table_header);

        for (p = ax25_table; p->ctl_name; p++)
                kfree(p->child);
        kfree(ax25_table);
}

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