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/slab.h> 11 #include <linux/sysctl.h> 12 #include <linux/spinlock.h> 13 #include <net/ax25.h> 14 15 static int min_ipdefmode[1], max_ipdefmode[] = {1}; 16 static int min_axdefmode[1], max_axdefmode[] = {1}; 17 static int min_backoff[1], max_backoff[] = {2}; 18 static int min_conmode[1], max_conmode[] = {2}; 19 static int min_window[] = {1}, max_window[] = {7}; 20 static int min_ewindow[] = {1}, max_ewindow[] = {63}; 21 static int min_t1[] = {1}, max_t1[] = {30000}; 22 static int min_t2[] = {1}, max_t2[] = {20000}; 23 static int min_t3[1], max_t3[] = {3600000}; 24 static int min_idle[1], max_idle[] = {65535000}; 25 static int min_n2[] = {1}, max_n2[] = {31}; 26 static int min_paclen[] = {1}, max_paclen[] = {512}; 27 static int min_proto[1], max_proto[] = { AX25_PROTO_MAX }; 28 #ifdef CONFIG_AX25_DAMA_SLAVE 29 static int min_ds_timeout[1], max_ds_timeout[] = {65535000}; 30 #endif 31 32 static const struct ctl_table ax25_param_table[] = { 33 { 34 .procname = "ip_default_mode", 35 .maxlen = sizeof(int), 36 .mode = 0644, 37 .proc_handler = proc_dointvec_minmax, 38 .extra1 = &min_ipdefmode, 39 .extra2 = &max_ipdefmode 40 }, 41 { 42 .procname = "ax25_default_mode", 43 .maxlen = sizeof(int), 44 .mode = 0644, 45 .proc_handler = proc_dointvec_minmax, 46 .extra1 = &min_axdefmode, 47 .extra2 = &max_axdefmode 48 }, 49 { 50 .procname = "backoff_type", 51 .maxlen = sizeof(int), 52 .mode = 0644, 53 .proc_handler = proc_dointvec_minmax, 54 .extra1 = &min_backoff, 55 .extra2 = &max_backoff 56 }, 57 { 58 .procname = "connect_mode", 59 .maxlen = sizeof(int), 60 .mode = 0644, 61 .proc_handler = proc_dointvec_minmax, 62 .extra1 = &min_conmode, 63 .extra2 = &max_conmode 64 }, 65 { 66 .procname = "standard_window_size", 67 .maxlen = sizeof(int), 68 .mode = 0644, 69 .proc_handler = proc_dointvec_minmax, 70 .extra1 = &min_window, 71 .extra2 = &max_window 72 }, 73 { 74 .procname = "extended_window_size", 75 .maxlen = sizeof(int), 76 .mode = 0644, 77 .proc_handler = proc_dointvec_minmax, 78 .extra1 = &min_ewindow, 79 .extra2 = &max_ewindow 80 }, 81 { 82 .procname = "t1_timeout", 83 .maxlen = sizeof(int), 84 .mode = 0644, 85 .proc_handler = proc_dointvec_minmax, 86 .extra1 = &min_t1, 87 .extra2 = &max_t1 88 }, 89 { 90 .procname = "t2_timeout", 91 .maxlen = sizeof(int), 92 .mode = 0644, 93 .proc_handler = proc_dointvec_minmax, 94 .extra1 = &min_t2, 95 .extra2 = &max_t2 96 }, 97 { 98 .procname = "t3_timeout", 99 .maxlen = sizeof(int), 100 .mode = 0644, 101 .proc_handler = proc_dointvec_minmax, 102 .extra1 = &min_t3, 103 .extra2 = &max_t3 104 }, 105 { 106 .procname = "idle_timeout", 107 .maxlen = sizeof(int), 108 .mode = 0644, 109 .proc_handler = proc_dointvec_minmax, 110 .extra1 = &min_idle, 111 .extra2 = &max_idle 112 }, 113 { 114 .procname = "maximum_retry_count", 115 .maxlen = sizeof(int), 116 .mode = 0644, 117 .proc_handler = proc_dointvec_minmax, 118 .extra1 = &min_n2, 119 .extra2 = &max_n2 120 }, 121 { 122 .procname = "maximum_packet_length", 123 .maxlen = sizeof(int), 124 .mode = 0644, 125 .proc_handler = proc_dointvec_minmax, 126 .extra1 = &min_paclen, 127 .extra2 = &max_paclen 128 }, 129 { 130 .procname = "protocol", 131 .maxlen = sizeof(int), 132 .mode = 0644, 133 .proc_handler = proc_dointvec_minmax, 134 .extra1 = &min_proto, 135 .extra2 = &max_proto 136 }, 137 #ifdef CONFIG_AX25_DAMA_SLAVE 138 { 139 .procname = "dama_slave_timeout", 140 .maxlen = sizeof(int), 141 .mode = 0644, 142 .proc_handler = proc_dointvec_minmax, 143 .extra1 = &min_ds_timeout, 144 .extra2 = &max_ds_timeout 145 }, 146 #endif 147 148 { } /* that's all, folks! */ 149 }; 150 151 int ax25_register_dev_sysctl(ax25_dev *ax25_dev) 152 { 153 char path[sizeof("net/ax25/") + IFNAMSIZ]; 154 int k; 155 struct ctl_table *table; 156 157 table = kmemdup(ax25_param_table, sizeof(ax25_param_table), GFP_KERNEL); 158 if (!table) 159 return -ENOMEM; 160 161 for (k = 0; k < AX25_MAX_VALUES; k++) 162 table[k].data = &ax25_dev->values[k]; 163 164 snprintf(path, sizeof(path), "net/ax25/%s", ax25_dev->dev->name); 165 ax25_dev->sysheader = register_net_sysctl(&init_net, path, table); 166 if (!ax25_dev->sysheader) { 167 kfree(table); 168 return -ENOMEM; 169 } 170 return 0; 171 } 172 173 void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev) 174 { 175 struct ctl_table_header *header = ax25_dev->sysheader; 176 struct ctl_table *table; 177 178 if (header) { 179 ax25_dev->sysheader = NULL; 180 table = header->ctl_table_arg; 181 unregister_net_sysctl_table(header); 182 kfree(table); 183 } 184 } 185