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 40 static const ctl_table ax25_param_table[] = { 41 { 42 .ctl_name = NET_AX25_IP_DEFAULT_MODE, 43 .procname = "ip_default_mode", 44 .maxlen = sizeof(int), 45 .mode = 0644, 46 .proc_handler = &proc_dointvec_minmax, 47 .strategy = &sysctl_intvec, 48 .extra1 = &min_ipdefmode, 49 .extra2 = &max_ipdefmode 50 }, 51 { 52 .ctl_name = NET_AX25_DEFAULT_MODE, 53 .procname = "ax25_default_mode", 54 .maxlen = sizeof(int), 55 .mode = 0644, 56 .proc_handler = &proc_dointvec_minmax, 57 .strategy = &sysctl_intvec, 58 .extra1 = &min_axdefmode, 59 .extra2 = &max_axdefmode 60 }, 61 { 62 .ctl_name = NET_AX25_BACKOFF_TYPE, 63 .procname = "backoff_type", 64 .maxlen = sizeof(int), 65 .mode = 0644, 66 .proc_handler = &proc_dointvec_minmax, 67 .strategy = &sysctl_intvec, 68 .extra1 = &min_backoff, 69 .extra2 = &max_backoff 70 }, 71 { 72 .ctl_name = NET_AX25_CONNECT_MODE, 73 .procname = "connect_mode", 74 .maxlen = sizeof(int), 75 .mode = 0644, 76 .proc_handler = &proc_dointvec_minmax, 77 .strategy = &sysctl_intvec, 78 .extra1 = &min_conmode, 79 .extra2 = &max_conmode 80 }, 81 { 82 .ctl_name = NET_AX25_STANDARD_WINDOW, 83 .procname = "standard_window_size", 84 .maxlen = sizeof(int), 85 .mode = 0644, 86 .proc_handler = &proc_dointvec_minmax, 87 .strategy = &sysctl_intvec, 88 .extra1 = &min_window, 89 .extra2 = &max_window 90 }, 91 { 92 .ctl_name = NET_AX25_EXTENDED_WINDOW, 93 .procname = "extended_window_size", 94 .maxlen = sizeof(int), 95 .mode = 0644, 96 .proc_handler = &proc_dointvec_minmax, 97 .strategy = &sysctl_intvec, 98 .extra1 = &min_ewindow, 99 .extra2 = &max_ewindow 100 }, 101 { 102 .ctl_name = NET_AX25_T1_TIMEOUT, 103 .procname = "t1_timeout", 104 .maxlen = sizeof(int), 105 .mode = 0644, 106 .proc_handler = &proc_dointvec_minmax, 107 .strategy = &sysctl_intvec, 108 .extra1 = &min_t1, 109 .extra2 = &max_t1 110 }, 111 { 112 .ctl_name = NET_AX25_T2_TIMEOUT, 113 .procname = "t2_timeout", 114 .maxlen = sizeof(int), 115 .mode = 0644, 116 .proc_handler = &proc_dointvec_minmax, 117 .strategy = &sysctl_intvec, 118 .extra1 = &min_t2, 119 .extra2 = &max_t2 120 }, 121 { 122 .ctl_name = NET_AX25_T3_TIMEOUT, 123 .procname = "t3_timeout", 124 .maxlen = sizeof(int), 125 .mode = 0644, 126 .proc_handler = &proc_dointvec_minmax, 127 .strategy = &sysctl_intvec, 128 .extra1 = &min_t3, 129 .extra2 = &max_t3 130 }, 131 { 132 .ctl_name = NET_AX25_IDLE_TIMEOUT, 133 .procname = "idle_timeout", 134 .maxlen = sizeof(int), 135 .mode = 0644, 136 .proc_handler = &proc_dointvec_minmax, 137 .strategy = &sysctl_intvec, 138 .extra1 = &min_idle, 139 .extra2 = &max_idle 140 }, 141 { 142 .ctl_name = NET_AX25_N2, 143 .procname = "maximum_retry_count", 144 .maxlen = sizeof(int), 145 .mode = 0644, 146 .proc_handler = &proc_dointvec_minmax, 147 .strategy = &sysctl_intvec, 148 .extra1 = &min_n2, 149 .extra2 = &max_n2 150 }, 151 { 152 .ctl_name = NET_AX25_PACLEN, 153 .procname = "maximum_packet_length", 154 .maxlen = sizeof(int), 155 .mode = 0644, 156 .proc_handler = &proc_dointvec_minmax, 157 .strategy = &sysctl_intvec, 158 .extra1 = &min_paclen, 159 .extra2 = &max_paclen 160 }, 161 { 162 .ctl_name = NET_AX25_PROTOCOL, 163 .procname = "protocol", 164 .maxlen = sizeof(int), 165 .mode = 0644, 166 .proc_handler = &proc_dointvec_minmax, 167 .strategy = &sysctl_intvec, 168 .extra1 = &min_proto, 169 .extra2 = &max_proto 170 }, 171 #ifdef CONFIG_AX25_DAMA_SLAVE 172 { 173 .ctl_name = NET_AX25_DAMA_SLAVE_TIMEOUT, 174 .procname = "dama_slave_timeout", 175 .maxlen = sizeof(int), 176 .mode = 0644, 177 .proc_handler = &proc_dointvec_minmax, 178 .strategy = &sysctl_intvec, 179 .extra1 = &min_ds_timeout, 180 .extra2 = &max_ds_timeout 181 }, 182 #endif 183 184 { .ctl_name = 0 } /* that's all, folks! */ 185 }; 186 187 void ax25_register_sysctl(void) 188 { 189 ax25_dev *ax25_dev; 190 int n, k; 191 192 spin_lock_bh(&ax25_dev_lock); 193 for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) 194 ax25_table_size += sizeof(ctl_table); 195 196 if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) { 197 spin_unlock_bh(&ax25_dev_lock); 198 return; 199 } 200 201 for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) { 202 struct ctl_table *child = kmemdup(ax25_param_table, 203 sizeof(ax25_param_table), 204 GFP_ATOMIC); 205 if (!child) { 206 while (n--) 207 kfree(ax25_table[n].child); 208 kfree(ax25_table); 209 spin_unlock_bh(&ax25_dev_lock); 210 return; 211 } 212 ax25_table[n].child = ax25_dev->systable = child; 213 ax25_table[n].ctl_name = n + 1; 214 ax25_table[n].procname = ax25_dev->dev->name; 215 ax25_table[n].mode = 0555; 216 217 child[AX25_MAX_VALUES].ctl_name = 0; /* just in case... */ 218 219 for (k = 0; k < AX25_MAX_VALUES; k++) 220 child[k].data = &ax25_dev->values[k]; 221 222 n++; 223 } 224 spin_unlock_bh(&ax25_dev_lock); 225 226 ax25_table_header = register_sysctl_paths(ax25_path, ax25_table); 227 } 228 229 void ax25_unregister_sysctl(void) 230 { 231 ctl_table *p; 232 unregister_sysctl_table(ax25_table_header); 233 234 for (p = ax25_table; p->ctl_name; p++) 235 kfree(p->child); 236 kfree(ax25_table); 237 } 238