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 14 static int min_ipdefmode[1], max_ipdefmode[] = {1}; 15 static int min_axdefmode[1], max_axdefmode[] = {1}; 16 static int min_backoff[1], max_backoff[] = {2}; 17 static int min_conmode[1], max_conmode[] = {2}; 18 static int min_window[] = {1}, max_window[] = {7}; 19 static int min_ewindow[] = {1}, max_ewindow[] = {63}; 20 static int min_t1[] = {1}, max_t1[] = {30000}; 21 static int min_t2[] = {1}, max_t2[] = {20000}; 22 static int min_t3[1], max_t3[] = {3600000}; 23 static int min_idle[1], max_idle[] = {65535000}; 24 static int min_n2[] = {1}, max_n2[] = {31}; 25 static int min_paclen[] = {1}, max_paclen[] = {512}; 26 static int min_proto[1], max_proto[] = { AX25_PROTO_MAX }; 27 static int min_ds_timeout[1], max_ds_timeout[] = {65535000}; 28 29 static struct ctl_table_header *ax25_table_header; 30 31 static ctl_table *ax25_table; 32 static int ax25_table_size; 33 34 static struct ctl_path ax25_path[] = { 35 { .procname = "net", .ctl_name = CTL_NET, }, 36 { .procname = "ax25", .ctl_name = NET_AX25, }, 37 { } 38 }; 39 static const ctl_table ax25_param_table[] = { 40 { 41 .ctl_name = NET_AX25_IP_DEFAULT_MODE, 42 .procname = "ip_default_mode", 43 .maxlen = sizeof(int), 44 .mode = 0644, 45 .proc_handler = &proc_dointvec_minmax, 46 .strategy = &sysctl_intvec, 47 .extra1 = &min_ipdefmode, 48 .extra2 = &max_ipdefmode 49 }, 50 { 51 .ctl_name = NET_AX25_DEFAULT_MODE, 52 .procname = "ax25_default_mode", 53 .maxlen = sizeof(int), 54 .mode = 0644, 55 .proc_handler = &proc_dointvec_minmax, 56 .strategy = &sysctl_intvec, 57 .extra1 = &min_axdefmode, 58 .extra2 = &max_axdefmode 59 }, 60 { 61 .ctl_name = NET_AX25_BACKOFF_TYPE, 62 .procname = "backoff_type", 63 .maxlen = sizeof(int), 64 .mode = 0644, 65 .proc_handler = &proc_dointvec_minmax, 66 .strategy = &sysctl_intvec, 67 .extra1 = &min_backoff, 68 .extra2 = &max_backoff 69 }, 70 { 71 .ctl_name = NET_AX25_CONNECT_MODE, 72 .procname = "connect_mode", 73 .maxlen = sizeof(int), 74 .mode = 0644, 75 .proc_handler = &proc_dointvec_minmax, 76 .strategy = &sysctl_intvec, 77 .extra1 = &min_conmode, 78 .extra2 = &max_conmode 79 }, 80 { 81 .ctl_name = NET_AX25_STANDARD_WINDOW, 82 .procname = "standard_window_size", 83 .maxlen = sizeof(int), 84 .mode = 0644, 85 .proc_handler = &proc_dointvec_minmax, 86 .strategy = &sysctl_intvec, 87 .extra1 = &min_window, 88 .extra2 = &max_window 89 }, 90 { 91 .ctl_name = NET_AX25_EXTENDED_WINDOW, 92 .procname = "extended_window_size", 93 .maxlen = sizeof(int), 94 .mode = 0644, 95 .proc_handler = &proc_dointvec_minmax, 96 .strategy = &sysctl_intvec, 97 .extra1 = &min_ewindow, 98 .extra2 = &max_ewindow 99 }, 100 { 101 .ctl_name = NET_AX25_T1_TIMEOUT, 102 .procname = "t1_timeout", 103 .maxlen = sizeof(int), 104 .mode = 0644, 105 .proc_handler = &proc_dointvec_minmax, 106 .strategy = &sysctl_intvec, 107 .extra1 = &min_t1, 108 .extra2 = &max_t1 109 }, 110 { 111 .ctl_name = NET_AX25_T2_TIMEOUT, 112 .procname = "t2_timeout", 113 .maxlen = sizeof(int), 114 .mode = 0644, 115 .proc_handler = &proc_dointvec_minmax, 116 .strategy = &sysctl_intvec, 117 .extra1 = &min_t2, 118 .extra2 = &max_t2 119 }, 120 { 121 .ctl_name = NET_AX25_T3_TIMEOUT, 122 .procname = "t3_timeout", 123 .maxlen = sizeof(int), 124 .mode = 0644, 125 .proc_handler = &proc_dointvec_minmax, 126 .strategy = &sysctl_intvec, 127 .extra1 = &min_t3, 128 .extra2 = &max_t3 129 }, 130 { 131 .ctl_name = NET_AX25_IDLE_TIMEOUT, 132 .procname = "idle_timeout", 133 .maxlen = sizeof(int), 134 .mode = 0644, 135 .proc_handler = &proc_dointvec_minmax, 136 .strategy = &sysctl_intvec, 137 .extra1 = &min_idle, 138 .extra2 = &max_idle 139 }, 140 { 141 .ctl_name = NET_AX25_N2, 142 .procname = "maximum_retry_count", 143 .maxlen = sizeof(int), 144 .mode = 0644, 145 .proc_handler = &proc_dointvec_minmax, 146 .strategy = &sysctl_intvec, 147 .extra1 = &min_n2, 148 .extra2 = &max_n2 149 }, 150 { 151 .ctl_name = NET_AX25_PACLEN, 152 .procname = "maximum_packet_length", 153 .maxlen = sizeof(int), 154 .mode = 0644, 155 .proc_handler = &proc_dointvec_minmax, 156 .strategy = &sysctl_intvec, 157 .extra1 = &min_paclen, 158 .extra2 = &max_paclen 159 }, 160 { 161 .ctl_name = NET_AX25_PROTOCOL, 162 .procname = "protocol", 163 .maxlen = sizeof(int), 164 .mode = 0644, 165 .proc_handler = &proc_dointvec_minmax, 166 .strategy = &sysctl_intvec, 167 .extra1 = &min_proto, 168 .extra2 = &max_proto 169 }, 170 { 171 .ctl_name = NET_AX25_DAMA_SLAVE_TIMEOUT, 172 .procname = "dama_slave_timeout", 173 .maxlen = sizeof(int), 174 .mode = 0644, 175 .proc_handler = &proc_dointvec_minmax, 176 .strategy = &sysctl_intvec, 177 .extra1 = &min_ds_timeout, 178 .extra2 = &max_ds_timeout 179 }, 180 { .ctl_name = 0 } /* that's all, folks! */ 181 }; 182 183 void ax25_register_sysctl(void) 184 { 185 ax25_dev *ax25_dev; 186 int n, k; 187 188 spin_lock_bh(&ax25_dev_lock); 189 for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) 190 ax25_table_size += sizeof(ctl_table); 191 192 if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) { 193 spin_unlock_bh(&ax25_dev_lock); 194 return; 195 } 196 197 for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) { 198 struct ctl_table *child = kmemdup(ax25_param_table, 199 sizeof(ax25_param_table), 200 GFP_ATOMIC); 201 if (!child) { 202 while (n--) 203 kfree(ax25_table[n].child); 204 kfree(ax25_table); 205 spin_unlock_bh(&ax25_dev_lock); 206 return; 207 } 208 ax25_table[n].child = ax25_dev->systable = child; 209 ax25_table[n].ctl_name = n + 1; 210 ax25_table[n].procname = ax25_dev->dev->name; 211 ax25_table[n].mode = 0555; 212 213 #ifndef CONFIG_AX25_DAMA_SLAVE 214 /* 215 * We do not wish to have a representation of this parameter 216 * in /proc/sys/ when configured *not* to include the 217 * AX.25 DAMA slave code, do we? 218 */ 219 220 child[AX25_VALUES_DS_TIMEOUT].procname = NULL; 221 #endif 222 223 child[AX25_MAX_VALUES].ctl_name = 0; /* just in case... */ 224 225 for (k = 0; k < AX25_MAX_VALUES; k++) 226 child[k].data = &ax25_dev->values[k]; 227 228 n++; 229 } 230 spin_unlock_bh(&ax25_dev_lock); 231 232 ax25_table_header = register_sysctl_paths(ax25_path, ax25_table); 233 } 234 235 void ax25_unregister_sysctl(void) 236 { 237 ctl_table *p; 238 unregister_sysctl_table(ax25_table_header); 239 240 for (p = ax25_table; p->ctl_name; p++) 241 kfree(p->child); 242 kfree(ax25_table); 243 } 244