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
br_ioctl_device(struct net_bridge * br,unsigned int cmd,unsigned long arg0,unsigned long arg1,unsigned long arg2)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
br_ioctl_deviceless(unsigned int cmd,unsigned long arg0,unsigned long arg1)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
br_ioctl_deviceless_stub(unsigned long arg)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
br_ioctl(struct net_bridge * br,unsigned int cmd,unsigned long arg0,unsigned long arg1,unsigned long arg2)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 }
259