net/ax25/sysctl_net_ax25.c

   1 /* -*- linux-c -*-
   2  * sysctl_net_ax25.c: sysctl interface to net AX.25 subsystem.
   3  *
   4  * Begun April 1, 1996, Mike Shaver.
   5  * Added /proc/sys/net/ax25 directory entry (empty =) ). [MS]
   6  */
   7
   8 #include <linux/config.h>
   9 #include <linux/mm.h>
  10 #include <linux/sysctl.h>
  11 #include <net/ax25.h>
  12
  13 static int min_ipdefmode[] = {0},       max_ipdefmode[] = {1};
  14 static int min_axdefmode[] = {0},       max_axdefmode[] = {1};
  15 static int min_backoff[] = {0},         max_backoff[] = {2};
  16 static int min_conmode[] = {0},         max_conmode[] = {2};
  17 static int min_window[] = {1},          max_window[] = {7};
  18 static int min_ewindow[] = {1},         max_ewindow[] = {63};
  19 static int min_t1[] = {1},              max_t1[] = {30 * HZ};
  20 static int min_t2[] = {1},              max_t2[] = {20 * HZ};
  21 static int min_t3[] = {0},              max_t3[] = {3600 * HZ};
  22 static int min_idle[] = {0},            max_idle[] = {65535 * HZ};
  23 static int min_n2[] = {1},              max_n2[] = {31};
  24 static int min_paclen[] = {1},          max_paclen[] = {512};
  25 static int min_proto[] = {0},           max_proto[] = {3};
  26 static int min_ds_timeout[] = {0},      max_ds_timeout[] = {65535 * HZ};
  27
  28 static struct ctl_table_header *ax25_table_header;
  29
  30 static ctl_table *ax25_table;
  31 static int ax25_table_size;
  32
  33 static ctl_table ax25_dir_table[] = {
  34         {NET_AX25, "ax25", NULL, 0, 0555, NULL},
  35         {0}
  36 };
  37
  38 static ctl_table ax25_root_table[] = {
  39         {CTL_NET, "net", NULL, 0, 0555, ax25_dir_table},
  40         {0}
  41 };
  42
  43 static const ctl_table ax25_param_table[] = {
  44         {NET_AX25_IP_DEFAULT_MODE, "ip_default_mode",
  45          NULL, sizeof(int), 0644, NULL,
  46          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  47          &min_ipdefmode, &max_ipdefmode},
  48         {NET_AX25_DEFAULT_MODE, "ax25_default_mode",
  49          NULL, sizeof(int), 0644, NULL,
  50          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  51          &min_axdefmode, &max_axdefmode},
  52         {NET_AX25_BACKOFF_TYPE, "backoff_type",
  53          NULL, sizeof(int), 0644, NULL,
  54          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  55          &min_backoff, &max_backoff},
  56         {NET_AX25_CONNECT_MODE, "connect_mode",
  57          NULL, sizeof(int), 0644, NULL,
  58          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  59          &min_conmode, &max_conmode},
  60         {NET_AX25_STANDARD_WINDOW, "standard_window_size",
  61          NULL, sizeof(int), 0644, NULL,
  62          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  63          &min_window, &max_window},
  64         {NET_AX25_EXTENDED_WINDOW, "extended_window_size",
  65          NULL, sizeof(int), 0644, NULL,
  66          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  67          &min_ewindow, &max_ewindow},
  68         {NET_AX25_T1_TIMEOUT, "t1_timeout",
  69          NULL, sizeof(int), 0644, NULL,
  70          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  71          &min_t1, &max_t1},
  72         {NET_AX25_T2_TIMEOUT, "t2_timeout",
  73          NULL, sizeof(int), 0644, NULL,
  74          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  75          &min_t2, &max_t2},
  76         {NET_AX25_T3_TIMEOUT, "t3_timeout",
  77          NULL, sizeof(int), 0644, NULL,
  78          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  79          &min_t3, &max_t3},
  80         {NET_AX25_IDLE_TIMEOUT, "idle_timeout",
  81          NULL, sizeof(int), 0644, NULL,
  82          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  83          &min_idle, &max_idle},
  84         {NET_AX25_N2, "maximum_retry_count",
  85          NULL, sizeof(int), 0644, NULL,
  86          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  87          &min_n2, &max_n2},
  88         {NET_AX25_PACLEN, "maximum_packet_length",
  89          NULL, sizeof(int), 0644, NULL,
  90          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  91          &min_paclen, &max_paclen},
  92         {NET_AX25_PROTOCOL, "protocol",
  93          NULL, sizeof(int), 0644, NULL,
  94          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  95          &min_proto, &max_proto},
  96         {NET_AX25_DAMA_SLAVE_TIMEOUT, "dama_slave_timeout",
  97          NULL, sizeof(int), 0644, NULL,
  98          &proc_dointvec_minmax, &sysctl_intvec, NULL,
  99          &min_ds_timeout, &max_ds_timeout},
 100         {0}     /* that's all, folks! */
 101 };
 102
 103 void ax25_register_sysctl(void)
 104 {
 105         ax25_dev *ax25_dev;
 106         int n, k;
 107
 108         for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
 109                 ax25_table_size += sizeof(ctl_table);
 110
 111         if ((ax25_table = kmalloc(ax25_table_size, GFP_ATOMIC)) == NULL)
 112                 return;
 113
 114         memset(ax25_table, 0x00, ax25_table_size);
 115
 116         for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
 117                 ctl_table *child = kmalloc(sizeof(ax25_param_table), GFP_ATOMIC);
 118                 if (!child) {
 119                         while (n--)
 120                                 kfree(ax25_table[n].child);
 121                         kfree(ax25_table);
 122                         return;
 123                 }
 124                 memcpy(child, ax25_param_table, sizeof(ax25_param_table));
 125                 ax25_table[n].child = ax25_dev->systable = child;
 126                 ax25_table[n].ctl_name     = n + 1;
 127                 ax25_table[n].procname     = ax25_dev->dev->name;
 128                 ax25_table[n].mode         = 0555;
 129
 130 #ifndef CONFIG_AX25_DAMA_SLAVE
 131                 /*
 132                  * We do not wish to have a representation of this parameter
 133                  * in /proc/sys/ when configured *not* to include the
 134                  * AX.25 DAMA slave code, do we?
 135                  */
 136
 137                 child[AX25_VALUES_DS_TIMEOUT].procname = NULL;
 138 #endif
 139
 140                 child[AX25_MAX_VALUES].ctl_name = 0;    /* just in case... */
 141
 142                 for (k = 0; k < AX25_MAX_VALUES; k++)
 143                         child[k].data = &ax25_dev->values[k];
 144
 145                 n++;
 146         }
 147
 148         ax25_dir_table[0].child = ax25_table;
 149
 150         ax25_table_header = register_sysctl_table(ax25_root_table, 1);
 151 }
 152
 153 void ax25_unregister_sysctl(void)
 154 {
 155         ctl_table *p;
 156         unregister_sysctl_table(ax25_table_header);
 157
 158         ax25_dir_table[0].child = NULL;
 159         for (p = ax25_table; p->ctl_name; p++)
 160                 kfree(p->child);
 161         kfree(ax25_table);
 162 }