Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Sysfs attributes of bridge ports | |
3 | * Linux ethernet bridge | |
4 | * | |
5 | * Authors: | |
6 | * Stephen Hemminger <shemminger@osdl.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
4fc268d2 | 14 | #include <linux/capability.h> |
1da177e4 LT |
15 | #include <linux/kernel.h> |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/if_bridge.h> | |
18 | #include <linux/rtnetlink.h> | |
19 | #include <linux/spinlock.h> | |
20 | #include <linux/times.h> | |
21 | ||
22 | #include "br_private.h" | |
23 | ||
24 | #define to_class_dev(obj) container_of(obj,struct class_device,kobj) | |
25 | #define to_net_dev(class) container_of(class, struct net_device, class_dev) | |
26 | #define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv)) | |
27 | ||
28 | /* | |
29 | * Common code for storing bridge parameters. | |
30 | */ | |
31 | static ssize_t store_bridge_parm(struct class_device *cd, | |
32 | const char *buf, size_t len, | |
33 | void (*set)(struct net_bridge *, unsigned long)) | |
34 | { | |
35 | struct net_bridge *br = to_bridge(cd); | |
36 | char *endp; | |
37 | unsigned long val; | |
38 | ||
39 | if (!capable(CAP_NET_ADMIN)) | |
40 | return -EPERM; | |
41 | ||
42 | val = simple_strtoul(buf, &endp, 0); | |
43 | if (endp == buf) | |
44 | return -EINVAL; | |
45 | ||
46 | spin_lock_bh(&br->lock); | |
47 | (*set)(br, val); | |
48 | spin_unlock_bh(&br->lock); | |
49 | return len; | |
50 | } | |
51 | ||
52 | ||
53 | static ssize_t show_forward_delay(struct class_device *cd, char *buf) | |
54 | { | |
55 | struct net_bridge *br = to_bridge(cd); | |
56 | return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay)); | |
57 | } | |
58 | ||
59 | static void set_forward_delay(struct net_bridge *br, unsigned long val) | |
60 | { | |
61 | unsigned long delay = clock_t_to_jiffies(val); | |
62 | br->forward_delay = delay; | |
63 | if (br_is_root_bridge(br)) | |
64 | br->bridge_forward_delay = delay; | |
65 | } | |
66 | ||
67 | static ssize_t store_forward_delay(struct class_device *cd, const char *buf, | |
68 | size_t len) | |
69 | { | |
70 | return store_bridge_parm(cd, buf, len, set_forward_delay); | |
71 | } | |
72 | static CLASS_DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR, | |
73 | show_forward_delay, store_forward_delay); | |
74 | ||
75 | static ssize_t show_hello_time(struct class_device *cd, char *buf) | |
76 | { | |
77 | return sprintf(buf, "%lu\n", | |
78 | jiffies_to_clock_t(to_bridge(cd)->hello_time)); | |
79 | } | |
80 | ||
81 | static void set_hello_time(struct net_bridge *br, unsigned long val) | |
82 | { | |
83 | unsigned long t = clock_t_to_jiffies(val); | |
84 | br->hello_time = t; | |
85 | if (br_is_root_bridge(br)) | |
86 | br->bridge_hello_time = t; | |
87 | } | |
88 | ||
89 | static ssize_t store_hello_time(struct class_device *cd, const char *buf, | |
90 | size_t len) | |
91 | { | |
92 | return store_bridge_parm(cd, buf, len, set_hello_time); | |
93 | } | |
94 | ||
95 | static CLASS_DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time, | |
96 | store_hello_time); | |
97 | ||
98 | static ssize_t show_max_age(struct class_device *cd, char *buf) | |
99 | { | |
100 | return sprintf(buf, "%lu\n", | |
101 | jiffies_to_clock_t(to_bridge(cd)->max_age)); | |
102 | } | |
103 | ||
104 | static void set_max_age(struct net_bridge *br, unsigned long val) | |
105 | { | |
106 | unsigned long t = clock_t_to_jiffies(val); | |
107 | br->max_age = t; | |
108 | if (br_is_root_bridge(br)) | |
109 | br->bridge_max_age = t; | |
110 | } | |
111 | ||
112 | static ssize_t store_max_age(struct class_device *cd, const char *buf, | |
113 | size_t len) | |
114 | { | |
115 | return store_bridge_parm(cd, buf, len, set_max_age); | |
116 | } | |
117 | ||
118 | static CLASS_DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, | |
119 | store_max_age); | |
120 | ||
121 | static ssize_t show_ageing_time(struct class_device *cd, char *buf) | |
122 | { | |
123 | struct net_bridge *br = to_bridge(cd); | |
124 | return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time)); | |
125 | } | |
126 | ||
127 | static void set_ageing_time(struct net_bridge *br, unsigned long val) | |
128 | { | |
129 | br->ageing_time = clock_t_to_jiffies(val); | |
130 | } | |
131 | ||
132 | static ssize_t store_ageing_time(struct class_device *cd, const char *buf, | |
133 | size_t len) | |
134 | { | |
135 | return store_bridge_parm(cd, buf, len, set_ageing_time); | |
136 | } | |
137 | ||
138 | static CLASS_DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time, | |
139 | store_ageing_time); | |
140 | static ssize_t show_stp_state(struct class_device *cd, char *buf) | |
141 | { | |
142 | struct net_bridge *br = to_bridge(cd); | |
143 | return sprintf(buf, "%d\n", br->stp_enabled); | |
144 | } | |
145 | ||
146 | static void set_stp_state(struct net_bridge *br, unsigned long val) | |
147 | { | |
148 | br->stp_enabled = val; | |
149 | } | |
150 | ||
151 | static ssize_t store_stp_state(struct class_device *cd, | |
152 | const char *buf, size_t len) | |
153 | { | |
154 | return store_bridge_parm(cd, buf, len, set_stp_state); | |
155 | } | |
156 | ||
157 | static CLASS_DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state, | |
158 | store_stp_state); | |
159 | ||
160 | static ssize_t show_priority(struct class_device *cd, char *buf) | |
161 | { | |
162 | struct net_bridge *br = to_bridge(cd); | |
163 | return sprintf(buf, "%d\n", | |
164 | (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]); | |
165 | } | |
166 | ||
167 | static void set_priority(struct net_bridge *br, unsigned long val) | |
168 | { | |
169 | br_stp_set_bridge_priority(br, (u16) val); | |
170 | } | |
171 | ||
172 | static ssize_t store_priority(struct class_device *cd, | |
173 | const char *buf, size_t len) | |
174 | { | |
175 | return store_bridge_parm(cd, buf, len, set_priority); | |
176 | } | |
177 | static CLASS_DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, | |
178 | store_priority); | |
179 | ||
180 | static ssize_t show_root_id(struct class_device *cd, char *buf) | |
181 | { | |
182 | return br_show_bridge_id(buf, &to_bridge(cd)->designated_root); | |
183 | } | |
184 | static CLASS_DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL); | |
185 | ||
186 | static ssize_t show_bridge_id(struct class_device *cd, char *buf) | |
187 | { | |
188 | return br_show_bridge_id(buf, &to_bridge(cd)->bridge_id); | |
189 | } | |
190 | static CLASS_DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL); | |
191 | ||
192 | static ssize_t show_root_port(struct class_device *cd, char *buf) | |
193 | { | |
194 | return sprintf(buf, "%d\n", to_bridge(cd)->root_port); | |
195 | } | |
196 | static CLASS_DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL); | |
197 | ||
198 | static ssize_t show_root_path_cost(struct class_device *cd, char *buf) | |
199 | { | |
200 | return sprintf(buf, "%d\n", to_bridge(cd)->root_path_cost); | |
201 | } | |
202 | static CLASS_DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL); | |
203 | ||
204 | static ssize_t show_topology_change(struct class_device *cd, char *buf) | |
205 | { | |
206 | return sprintf(buf, "%d\n", to_bridge(cd)->topology_change); | |
207 | } | |
208 | static CLASS_DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL); | |
209 | ||
210 | static ssize_t show_topology_change_detected(struct class_device *cd, char *buf) | |
211 | { | |
212 | struct net_bridge *br = to_bridge(cd); | |
213 | return sprintf(buf, "%d\n", br->topology_change_detected); | |
214 | } | |
215 | static CLASS_DEVICE_ATTR(topology_change_detected, S_IRUGO, show_topology_change_detected, NULL); | |
216 | ||
217 | static ssize_t show_hello_timer(struct class_device *cd, char *buf) | |
218 | { | |
219 | struct net_bridge *br = to_bridge(cd); | |
220 | return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer)); | |
221 | } | |
222 | static CLASS_DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL); | |
223 | ||
224 | static ssize_t show_tcn_timer(struct class_device *cd, char *buf) | |
225 | { | |
226 | struct net_bridge *br = to_bridge(cd); | |
227 | return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer)); | |
228 | } | |
229 | static CLASS_DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL); | |
230 | ||
231 | static ssize_t show_topology_change_timer(struct class_device *cd, char *buf) | |
232 | { | |
233 | struct net_bridge *br = to_bridge(cd); | |
234 | return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer)); | |
235 | } | |
236 | static CLASS_DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, NULL); | |
237 | ||
238 | static ssize_t show_gc_timer(struct class_device *cd, char *buf) | |
239 | { | |
240 | struct net_bridge *br = to_bridge(cd); | |
241 | return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer)); | |
242 | } | |
243 | static CLASS_DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL); | |
244 | ||
fda93d92 SH |
245 | static ssize_t show_group_addr(struct class_device *cd, char *buf) |
246 | { | |
247 | struct net_bridge *br = to_bridge(cd); | |
248 | return sprintf(buf, "%x:%x:%x:%x:%x:%x\n", | |
249 | br->group_addr[0], br->group_addr[1], | |
250 | br->group_addr[2], br->group_addr[3], | |
251 | br->group_addr[4], br->group_addr[5]); | |
252 | } | |
253 | ||
254 | static ssize_t store_group_addr(struct class_device *cd, const char *buf, | |
255 | size_t len) | |
256 | { | |
257 | struct net_bridge *br = to_bridge(cd); | |
258 | unsigned new_addr[6]; | |
259 | int i; | |
260 | ||
261 | if (!capable(CAP_NET_ADMIN)) | |
262 | return -EPERM; | |
263 | ||
264 | if (sscanf(buf, "%x:%x:%x:%x:%x:%x", | |
265 | &new_addr[0], &new_addr[1], &new_addr[2], | |
266 | &new_addr[3], &new_addr[4], &new_addr[5]) != 6) | |
267 | return -EINVAL; | |
268 | ||
269 | /* Must be 01:80:c2:00:00:0X */ | |
270 | for (i = 0; i < 5; i++) | |
271 | if (new_addr[i] != br_group_address[i]) | |
272 | return -EINVAL; | |
273 | ||
274 | if (new_addr[5] & ~0xf) | |
275 | return -EINVAL; | |
276 | ||
277 | if (new_addr[5] == 1 /* 802.3x Pause address */ | |
278 | || new_addr[5] == 2 /* 802.3ad Slow protocols */ | |
279 | || new_addr[5] == 3) /* 802.1X PAE address */ | |
280 | return -EINVAL; | |
281 | ||
282 | spin_lock_bh(&br->lock); | |
283 | for (i = 0; i < 6; i++) | |
284 | br->group_addr[i] = new_addr[i]; | |
285 | spin_unlock_bh(&br->lock); | |
286 | return len; | |
287 | } | |
288 | ||
289 | static CLASS_DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR, | |
290 | show_group_addr, store_group_addr); | |
291 | ||
292 | ||
1da177e4 LT |
293 | static struct attribute *bridge_attrs[] = { |
294 | &class_device_attr_forward_delay.attr, | |
295 | &class_device_attr_hello_time.attr, | |
296 | &class_device_attr_max_age.attr, | |
297 | &class_device_attr_ageing_time.attr, | |
298 | &class_device_attr_stp_state.attr, | |
299 | &class_device_attr_priority.attr, | |
300 | &class_device_attr_bridge_id.attr, | |
301 | &class_device_attr_root_id.attr, | |
302 | &class_device_attr_root_path_cost.attr, | |
303 | &class_device_attr_root_port.attr, | |
304 | &class_device_attr_topology_change.attr, | |
305 | &class_device_attr_topology_change_detected.attr, | |
306 | &class_device_attr_hello_timer.attr, | |
307 | &class_device_attr_tcn_timer.attr, | |
308 | &class_device_attr_topology_change_timer.attr, | |
309 | &class_device_attr_gc_timer.attr, | |
fda93d92 | 310 | &class_device_attr_group_addr.attr, |
1da177e4 LT |
311 | NULL |
312 | }; | |
313 | ||
314 | static struct attribute_group bridge_group = { | |
315 | .name = SYSFS_BRIDGE_ATTR, | |
316 | .attrs = bridge_attrs, | |
317 | }; | |
318 | ||
319 | /* | |
320 | * Export the forwarding information table as a binary file | |
321 | * The records are struct __fdb_entry. | |
322 | * | |
323 | * Returns the number of bytes read. | |
324 | */ | |
325 | static ssize_t brforward_read(struct kobject *kobj, char *buf, | |
326 | loff_t off, size_t count) | |
327 | { | |
328 | struct class_device *cdev = to_class_dev(kobj); | |
329 | struct net_bridge *br = to_bridge(cdev); | |
330 | int n; | |
331 | ||
332 | /* must read whole records */ | |
333 | if (off % sizeof(struct __fdb_entry) != 0) | |
334 | return -EINVAL; | |
335 | ||
336 | n = br_fdb_fillbuf(br, buf, | |
337 | count / sizeof(struct __fdb_entry), | |
338 | off / sizeof(struct __fdb_entry)); | |
339 | ||
340 | if (n > 0) | |
341 | n *= sizeof(struct __fdb_entry); | |
342 | ||
343 | return n; | |
344 | } | |
345 | ||
346 | static struct bin_attribute bridge_forward = { | |
347 | .attr = { .name = SYSFS_BRIDGE_FDB, | |
348 | .mode = S_IRUGO, | |
349 | .owner = THIS_MODULE, }, | |
350 | .read = brforward_read, | |
351 | }; | |
352 | ||
353 | /* | |
354 | * Add entries in sysfs onto the existing network class device | |
355 | * for the bridge. | |
356 | * Adds a attribute group "bridge" containing tuning parameters. | |
357 | * Binary attribute containing the forward table | |
358 | * Sub directory to hold links to interfaces. | |
359 | * | |
360 | * Note: the ifobj exists only to be a subdirectory | |
361 | * to hold links. The ifobj exists in same data structure | |
362 | * as it's parent the bridge so reference counting works. | |
363 | */ | |
364 | int br_sysfs_addbr(struct net_device *dev) | |
365 | { | |
366 | struct kobject *brobj = &dev->class_dev.kobj; | |
367 | struct net_bridge *br = netdev_priv(dev); | |
368 | int err; | |
369 | ||
370 | err = sysfs_create_group(brobj, &bridge_group); | |
371 | if (err) { | |
372 | pr_info("%s: can't create group %s/%s\n", | |
373 | __FUNCTION__, dev->name, bridge_group.name); | |
374 | goto out1; | |
375 | } | |
376 | ||
377 | err = sysfs_create_bin_file(brobj, &bridge_forward); | |
378 | if (err) { | |
379 | pr_info("%s: can't create attribue file %s/%s\n", | |
380 | __FUNCTION__, dev->name, bridge_forward.attr.name); | |
381 | goto out2; | |
382 | } | |
383 | ||
384 | ||
385 | kobject_set_name(&br->ifobj, SYSFS_BRIDGE_PORT_SUBDIR); | |
386 | br->ifobj.ktype = NULL; | |
387 | br->ifobj.kset = NULL; | |
388 | br->ifobj.parent = brobj; | |
389 | ||
390 | err = kobject_register(&br->ifobj); | |
391 | if (err) { | |
392 | pr_info("%s: can't add kobject (directory) %s/%s\n", | |
393 | __FUNCTION__, dev->name, br->ifobj.name); | |
394 | goto out3; | |
395 | } | |
396 | return 0; | |
397 | out3: | |
398 | sysfs_remove_bin_file(&dev->class_dev.kobj, &bridge_forward); | |
399 | out2: | |
400 | sysfs_remove_group(&dev->class_dev.kobj, &bridge_group); | |
401 | out1: | |
402 | return err; | |
403 | ||
404 | } | |
405 | ||
406 | void br_sysfs_delbr(struct net_device *dev) | |
407 | { | |
408 | struct kobject *kobj = &dev->class_dev.kobj; | |
409 | struct net_bridge *br = netdev_priv(dev); | |
410 | ||
411 | kobject_unregister(&br->ifobj); | |
412 | sysfs_remove_bin_file(kobj, &bridge_forward); | |
413 | sysfs_remove_group(kobj, &bridge_group); | |
414 | } |