1/* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com) 8 */ 9#include <linux/mm.h> 10#include <linux/sysctl.h> 11#include <linux/spinlock.h> 12#include <net/ax25.h> 13 14static int min_ipdefmode[1], max_ipdefmode[] = {1}; 15static int min_axdefmode[1], max_axdefmode[] = {1}; 16static int min_backoff[1], max_backoff[] = {2}; 17static int min_conmode[1], max_conmode[] = {2}; 18static int min_window[] = {1}, max_window[] = {7}; 19static int min_ewindow[] = {1}, max_ewindow[] = {63}; 20static int min_t1[] = {1}, max_t1[] = {30000}; 21static int min_t2[] = {1}, max_t2[] = {20000}; 22static int min_t3[1], max_t3[] = {3600000}; 23static int min_idle[1], max_idle[] = {65535000}; 24static int min_n2[] = {1}, max_n2[] = {31}; 25static int min_paclen[] = {1}, max_paclen[] = {512}; 26static int min_proto[1], max_proto[] = { AX25_PROTO_MAX }; 27static int min_ds_timeout[1], max_ds_timeout[] = {65535000}; 28 29static struct ctl_table_header *ax25_table_header; 30 31static ctl_table *ax25_table; 32static int ax25_table_size; 33 34static ctl_table ax25_dir_table[] = { 35 { 36 .ctl_name = NET_AX25, 37 .procname = "ax25", 38 .mode = 0555, 39 }, 40 { .ctl_name = 0 } 41}; 42 43static ctl_table ax25_root_table[] = { 44 { 45 .ctl_name = CTL_NET, 46 .procname = "net", 47 .mode = 0555, 48 .child = ax25_dir_table 49 }, 50 { .ctl_name = 0 } 51}; 52 53static const ctl_table ax25_param_table[] = { 54 { 55 .ctl_name = NET_AX25_IP_DEFAULT_MODE, 56 .procname = "ip_default_mode", 57 .maxlen = sizeof(int), 58 .mode = 0644, 59 .proc_handler = &proc_dointvec_minmax, 60 .strategy = &sysctl_intvec, 61 .extra1 = &min_ipdefmode, 62 .extra2 = &max_ipdefmode 63 }, 64 { 65 .ctl_name = NET_AX25_DEFAULT_MODE, 66 .procname = "ax25_default_mode", 67 .maxlen = sizeof(int), 68 .mode = 0644, 69 .proc_handler = &proc_dointvec_minmax, 70 .strategy = &sysctl_intvec, 71 .extra1 = &min_axdefmode, 72 .extra2 = &max_axdefmode 73 }, 74 { 75 .ctl_name = NET_AX25_BACKOFF_TYPE, 76 .procname = "backoff_type", 77 .maxlen = sizeof(int), 78 .mode = 0644, 79 .proc_handler = &proc_dointvec_minmax, 80 .strategy = &sysctl_intvec, 81 .extra1 = &min_backoff, 82 .extra2 = &max_backoff 83 }, 84 { 85 .ctl_name = NET_AX25_CONNECT_MODE, 86 .procname = "connect_mode", 87 .maxlen = sizeof(int), 88 .mode = 0644, 89 .proc_handler = &proc_dointvec_minmax, 90 .strategy = &sysctl_intvec, 91 .extra1 = &min_conmode, 92 .extra2 = &max_conmode 93 }, 94 { 95 .ctl_name = NET_AX25_STANDARD_WINDOW, 96 .procname = "standard_window_size", 97 .maxlen = sizeof(int), 98 .mode = 0644, 99 .proc_handler = &proc_dointvec_minmax, 100 .strategy = &sysctl_intvec, 101 .extra1 = &min_window, 102 .extra2 = &max_window 103 }, 104 { 105 .ctl_name = NET_AX25_EXTENDED_WINDOW, 106 .procname = "extended_window_size", 107 .maxlen = sizeof(int), 108 .mode = 0644, 109 .proc_handler = &proc_dointvec_minmax, 110 .strategy = &sysctl_intvec, 111 .extra1 = &min_ewindow, 112 .extra2 = &max_ewindow 113 }, 114 { 115 .ctl_name = NET_AX25_T1_TIMEOUT, 116 .procname = "t1_timeout", 117 .maxlen = sizeof(int), 118 .mode = 0644, 119 .proc_handler = &proc_dointvec_minmax, 120 .strategy = &sysctl_intvec, 121 .extra1 = &min_t1, 122 .extra2 = &max_t1 123 }, 124 { 125 .ctl_name = NET_AX25_T2_TIMEOUT, 126 .procname = "t2_timeout", 127 .maxlen = sizeof(int), 128 .mode = 0644, 129 .proc_handler = &proc_dointvec_minmax, 130 .strategy = &sysctl_intvec, 131 .extra1 = &min_t2, 132 .extra2 = &max_t2 133 }, 134 { 135 .ctl_name = NET_AX25_T3_TIMEOUT, 136 .procname = "t3_timeout", 137 .maxlen = sizeof(int), 138 .mode = 0644, 139 .proc_handler = &proc_dointvec_minmax, 140 .strategy = &sysctl_intvec, 141 .extra1 = &min_t3, 142 .extra2 = &max_t3 143 }, 144 { 145 .ctl_name = NET_AX25_IDLE_TIMEOUT, 146 .procname = "idle_timeout", 147 .maxlen = sizeof(int), 148 .mode = 0644, 149 .proc_handler = &proc_dointvec_minmax, 150 .strategy = &sysctl_intvec, 151 .extra1 = &min_idle, 152 .extra2 = &max_idle 153 }, 154 { 155 .ctl_name = NET_AX25_N2, 156 .procname = "maximum_retry_count", 157 .maxlen = sizeof(int), 158 .mode = 0644, 159 .proc_handler = &proc_dointvec_minmax, 160 .strategy = &sysctl_intvec, 161 .extra1 = &min_n2, 162 .extra2 = &max_n2 163 }, 164 { 165 .ctl_name = NET_AX25_PACLEN, 166 .procname = "maximum_packet_length", 167 .maxlen = sizeof(int), 168 .mode = 0644, 169 .proc_handler = &proc_dointvec_minmax, 170 .strategy = &sysctl_intvec, 171 .extra1 = &min_paclen, 172 .extra2 = &max_paclen 173 }, 174 { 175 .ctl_name = NET_AX25_PROTOCOL, 176 .procname = "protocol", 177 .maxlen = sizeof(int), 178 .mode = 0644, 179 .proc_handler = &proc_dointvec_minmax, 180 .strategy = &sysctl_intvec, 181 .extra1 = &min_proto, 182 .extra2 = &max_proto 183 }, 184 { 185 .ctl_name = NET_AX25_DAMA_SLAVE_TIMEOUT, 186 .procname = "dama_slave_timeout", 187 .maxlen = sizeof(int), 188 .mode = 0644, 189 .proc_handler = &proc_dointvec_minmax, 190 .strategy = &sysctl_intvec, 191 .extra1 = &min_ds_timeout, 192 .extra2 = &max_ds_timeout 193 }, 194 { .ctl_name = 0 } /* that's all, folks! */ 195}; 196 197void ax25_register_sysctl(void) 198{ 199 ax25_dev *ax25_dev; 200 int n, k; 201 202 spin_lock_bh(&ax25_dev_lock); 203 for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) 204 ax25_table_size += sizeof(ctl_table); 205 206 if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) { 207 spin_unlock_bh(&ax25_dev_lock); 208 return; 209 } 210 211 for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) { 212 struct ctl_table *child = kmemdup(ax25_param_table, 213 sizeof(ax25_param_table), 214 GFP_ATOMIC); 215 if (!child) { 216 while (n--) 217 kfree(ax25_table[n].child); 218 kfree(ax25_table); 219 spin_unlock_bh(&ax25_dev_lock); 220 return; 221 } 222 ax25_table[n].child = ax25_dev->systable = child; 223 ax25_table[n].ctl_name = n + 1; 224 ax25_table[n].procname = ax25_dev->dev->name; 225 ax25_table[n].mode = 0555; 226 227#ifndef CONFIG_AX25_DAMA_SLAVE 228 /* 229 * We do not wish to have a representation of this parameter 230 * in /proc/sys/ when configured *not* to include the 231 * AX.25 DAMA slave code, do we? 232 */ 233 234 child[AX25_VALUES_DS_TIMEOUT].procname = NULL; 235#endif 236 237 child[AX25_MAX_VALUES].ctl_name = 0; /* just in case... */ 238 239 for (k = 0; k < AX25_MAX_VALUES; k++) 240 child[k].data = &ax25_dev->values[k]; 241 242 n++; 243 } 244 spin_unlock_bh(&ax25_dev_lock); 245 246 ax25_dir_table[0].child = ax25_table; 247 248 ax25_table_header = register_sysctl_table(ax25_root_table); 249} 250 251void ax25_unregister_sysctl(void) 252{ 253 ctl_table *p; 254 unregister_sysctl_table(ax25_table_header); 255 256 ax25_dir_table[0].child = NULL; 257 for (p = ax25_table; p->ctl_name; p++) 258 kfree(p->child); 259 kfree(ax25_table); 260} 261