net/bridge/br_ioctl.c

   1 /*
   2  *      Ioctl handler
   3  *      Linux ethernet bridge
   4  *
   5  *      Authors:
   6  *      Lennert Buytenhek               <buytenh@gnu.org>
   7  *
   8  *      $Id: br_ioctl.c,v 1.4 2000/11/08 05:16:40 davem Exp $
   9  *
  10  *      This program is free software; you can redistribute it and/or
  11  *      modify it under the terms of the GNU General Public License
  12  *      as published by the Free Software Foundation; either version
  13  *      2 of the License, or (at your option) any later version.
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/if_bridge.h>
  18 #include <linux/inetdevice.h>
  19 #include <linux/rtnetlink.h>
  20 #include <asm/uaccess.h>
  21 #include "br_private.h"
  22
  23 static int br_ioctl_device(struct net_bridge *br,
  24                            unsigned int cmd,
  25                            unsigned long arg0,
  26                            unsigned long arg1,
  27                            unsigned long arg2)
  28 {
  29         if (br == NULL)
  30                 return -EINVAL;
  31
  32         switch (cmd)
  33         {
  34         case BRCTL_ADD_IF:
  35         case BRCTL_DEL_IF:
  36         {
  37                 struct net_device *dev;
  38                 int ret;
  39
  40                 dev = dev_get_by_index(arg0);
  41                 if (dev == NULL)
  42                         return -EINVAL;
  43
  44                 if (cmd == BRCTL_ADD_IF)
  45                         ret = br_add_if(br, dev);
  46                 else
  47                         ret = br_del_if(br, dev);
  48
  49                 dev_put(dev);
  50                 return ret;
  51         }
  52
  53         case BRCTL_GET_BRIDGE_INFO:
  54         {
  55                 struct __bridge_info b;
  56
  57                 memset(&b, 0, sizeof(struct __bridge_info));
  58                 memcpy(&b.designated_root, &br->designated_root, 8);
  59                 memcpy(&b.bridge_id, &br->bridge_id, 8);
  60                 b.root_path_cost = br->root_path_cost;
  61                 b.max_age = br->max_age;
  62                 b.hello_time = br->hello_time;
  63                 b.forward_delay = br->forward_delay;
  64                 b.bridge_max_age = br->bridge_max_age;
  65                 b.bridge_hello_time = br->bridge_hello_time;
  66                 b.bridge_forward_delay = br->bridge_forward_delay;
  67                 b.topology_change = br->topology_change;
  68                 b.topology_change_detected = br->topology_change_detected;
  69                 b.root_port = br->root_port;
  70                 b.stp_enabled = br->stp_enabled;
  71                 b.ageing_time = br->ageing_time;
  72                 b.gc_interval = br->gc_interval;
  73                 b.hello_timer_value = br_timer_get_residue(&br->hello_timer);
  74                 b.tcn_timer_value = br_timer_get_residue(&br->tcn_timer);
  75                 b.topology_change_timer_value = br_timer_get_residue(&br->topology_change_timer);
  76                 b.gc_timer_value = br_timer_get_residue(&br->gc_timer);
  77
  78                 if (copy_to_user((void *)arg0, &b, sizeof(b)))
  79                         return -EFAULT;
  80
  81                 return 0;
  82         }
  83
  84         case BRCTL_GET_PORT_LIST:
  85         {
  86                 int i;
  87                 int indices[256];
  88
  89                 for (i=0;i<256;i++)
  90                         indices[i] = 0;
  91
  92                 br_get_port_ifindices(br, indices);
  93                 if (copy_to_user((void *)arg0, indices, 256*sizeof(int)))
  94                         return -EFAULT;
  95
  96                 return 0;
  97         }
  98
  99         case BRCTL_SET_BRIDGE_FORWARD_DELAY:
 100                 br->bridge_forward_delay = arg0;
 101                 if (br_is_root_bridge(br))
 102                         br->forward_delay = arg0;
 103                 return 0;
 104
 105         case BRCTL_SET_BRIDGE_HELLO_TIME:
 106                 br->bridge_hello_time = arg0;
 107                 if (br_is_root_bridge(br))
 108                         br->hello_time = arg0;
 109                 return 0;
 110
 111         case BRCTL_SET_BRIDGE_MAX_AGE:
 112                 br->bridge_max_age = arg0;
 113                 if (br_is_root_bridge(br))
 114                         br->max_age = arg0;
 115                 return 0;
 116
 117         case BRCTL_SET_AGEING_TIME:
 118                 br->ageing_time = arg0;
 119                 return 0;
 120
 121         case BRCTL_SET_GC_INTERVAL:
 122                 br->gc_interval = arg0;
 123                 return 0;
 124
 125         case BRCTL_GET_PORT_INFO:
 126         {
 127                 struct __port_info p;
 128                 struct net_bridge_port *pt;
 129
 130                 if ((pt = br_get_port(br, arg1)) == NULL)
 131                         return -EINVAL;
 132
 133                 memset(&p, 0, sizeof(struct __port_info));
 134                 memcpy(&p.designated_root, &pt->designated_root, 8);
 135                 memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
 136                 p.port_id = pt->port_id;
 137                 p.designated_port = pt->designated_port;
 138                 p.path_cost = pt->path_cost;
 139                 p.designated_cost = pt->designated_cost;
 140                 p.state = pt->state;
 141                 p.top_change_ack = pt->topology_change_ack;
 142                 p.config_pending = pt->config_pending;
 143                 p.message_age_timer_value = br_timer_get_residue(&pt->message_age_timer);
 144                 p.forward_delay_timer_value = br_timer_get_residue(&pt->forward_delay_timer);
 145                 p.hold_timer_value = br_timer_get_residue(&pt->hold_timer);
 146
 147                 if (copy_to_user((void *)arg0, &p, sizeof(p)))
 148                         return -EFAULT;
 149
 150                 return 0;
 151         }
 152
 153         case BRCTL_SET_BRIDGE_STP_STATE:
 154                 br->stp_enabled = arg0?1:0;
 155                 return 0;
 156
 157         case BRCTL_SET_BRIDGE_PRIORITY:
 158                 br_stp_set_bridge_priority(br, arg0);
 159                 return 0;
 160
 161         case BRCTL_SET_PORT_PRIORITY:
 162         {
 163                 struct net_bridge_port *p;
 164
 165                 if ((p = br_get_port(br, arg0)) == NULL)
 166                         return -EINVAL;
 167                 br_stp_set_port_priority(p, arg1);
 168                 return 0;
 169         }
 170
 171         case BRCTL_SET_PATH_COST:
 172         {
 173                 struct net_bridge_port *p;
 174
 175                 if ((p = br_get_port(br, arg0)) == NULL)
 176                         return -EINVAL;
 177                 br_stp_set_path_cost(p, arg1);
 178                 return 0;
 179         }
 180
 181         case BRCTL_GET_FDB_ENTRIES:
 182                 return br_fdb_get_entries(br, (void *)arg0, arg1, arg2);
 183         }
 184
 185         return -EOPNOTSUPP;
 186 }
 187
 188 static int br_ioctl_deviceless(unsigned int cmd,
 189                                unsigned long arg0,
 190                                unsigned long arg1)
 191 {
 192         switch (cmd)
 193         {
 194         case BRCTL_GET_VERSION:
 195                 return BRCTL_VERSION;
 196
 197         case BRCTL_GET_BRIDGES:
 198         {
 199                 int i;
 200                 int indices[64];
 201
 202                 for (i=0;i<64;i++)
 203                         indices[i] = 0;
 204
 205                 if (arg1 > 64)
 206                         arg1 = 64;
 207                 arg1 = br_get_bridge_ifindices(indices, arg1);
 208                 if (copy_to_user((void *)arg0, indices, arg1*sizeof(int)))
 209                         return -EFAULT;
 210
 211                 return arg1;
 212         }
 213
 214         case BRCTL_ADD_BRIDGE:
 215         case BRCTL_DEL_BRIDGE:
 216         {
 217                 char buf[IFNAMSIZ];
 218
 219                 if (copy_from_user(buf, (void *)arg0, IFNAMSIZ))
 220                         return -EFAULT;
 221
 222                 buf[IFNAMSIZ-1] = 0;
 223
 224                 if (cmd == BRCTL_ADD_BRIDGE)
 225                         return br_add_bridge(buf);
 226
 227                 return br_del_bridge(buf);
 228         }
 229         }
 230
 231         return -EOPNOTSUPP;
 232 }
 233
 234 int br_ioctl_deviceless_stub(unsigned long arg)
 235 {
 236         unsigned long i[3];
 237         int err;
 238
 239         if (!capable(CAP_NET_ADMIN))
 240                 return -EPERM;
 241
 242         if (copy_from_user(i, (void *)arg, 3*sizeof(unsigned long)))
 243                 return -EFAULT;
 244
 245         rtnl_lock();
 246         err =  br_ioctl_deviceless(i[0], i[1], i[2]);
 247         rtnl_unlock();
 248         return err;
 249 }
 250
 251 int br_ioctl(struct net_bridge *br, unsigned int cmd, unsigned long arg0, unsigned long arg1, unsigned long arg2)
 252 {
 253         if (!capable(CAP_NET_ADMIN))
 254                 return -EPERM;
 255
 256         ASSERT_RTNL();
 257         return br_ioctl_device(br, cmd, arg0, arg1, arg2);
 258 }