Commit | Line | Data |
---|---|---|
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 | ||
43cb76d9 | 24 | #define to_dev(obj) container_of(obj, struct device, kobj) |
1da177e4 LT |
25 | #define to_bridge(cd) ((struct net_bridge *)(to_net_dev(cd)->priv)) |
26 | ||
27 | /* | |
28 | * Common code for storing bridge parameters. | |
29 | */ | |
43cb76d9 | 30 | static ssize_t store_bridge_parm(struct device *d, |
1da177e4 | 31 | const char *buf, size_t len, |
8d4698f7 | 32 | int (*set)(struct net_bridge *, unsigned long)) |
1da177e4 | 33 | { |
43cb76d9 | 34 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
35 | char *endp; |
36 | unsigned long val; | |
8d4698f7 | 37 | int err; |
1da177e4 LT |
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); | |
8d4698f7 | 47 | err = (*set)(br, val); |
1da177e4 | 48 | spin_unlock_bh(&br->lock); |
8d4698f7 | 49 | return err ? err : len; |
1da177e4 LT |
50 | } |
51 | ||
52 | ||
43cb76d9 GKH |
53 | static ssize_t show_forward_delay(struct device *d, |
54 | struct device_attribute *attr, char *buf) | |
1da177e4 | 55 | { |
43cb76d9 | 56 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
57 | return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay)); |
58 | } | |
59 | ||
8d4698f7 | 60 | static int set_forward_delay(struct net_bridge *br, unsigned long val) |
1da177e4 LT |
61 | { |
62 | unsigned long delay = clock_t_to_jiffies(val); | |
63 | br->forward_delay = delay; | |
64 | if (br_is_root_bridge(br)) | |
65 | br->bridge_forward_delay = delay; | |
8d4698f7 | 66 | return 0; |
1da177e4 LT |
67 | } |
68 | ||
43cb76d9 GKH |
69 | static ssize_t store_forward_delay(struct device *d, |
70 | struct device_attribute *attr, | |
71 | const char *buf, size_t len) | |
1da177e4 | 72 | { |
43cb76d9 | 73 | return store_bridge_parm(d, buf, len, set_forward_delay); |
1da177e4 | 74 | } |
43cb76d9 GKH |
75 | static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR, |
76 | show_forward_delay, store_forward_delay); | |
1da177e4 | 77 | |
43cb76d9 GKH |
78 | static ssize_t show_hello_time(struct device *d, struct device_attribute *attr, |
79 | char *buf) | |
1da177e4 LT |
80 | { |
81 | return sprintf(buf, "%lu\n", | |
43cb76d9 | 82 | jiffies_to_clock_t(to_bridge(d)->hello_time)); |
1da177e4 LT |
83 | } |
84 | ||
8d4698f7 | 85 | static int set_hello_time(struct net_bridge *br, unsigned long val) |
1da177e4 LT |
86 | { |
87 | unsigned long t = clock_t_to_jiffies(val); | |
8d4698f7 SH |
88 | |
89 | if (t < HZ) | |
90 | return -EINVAL; | |
91 | ||
1da177e4 LT |
92 | br->hello_time = t; |
93 | if (br_is_root_bridge(br)) | |
94 | br->bridge_hello_time = t; | |
8d4698f7 | 95 | return 0; |
1da177e4 LT |
96 | } |
97 | ||
43cb76d9 GKH |
98 | static ssize_t store_hello_time(struct device *d, |
99 | struct device_attribute *attr, const char *buf, | |
1da177e4 LT |
100 | size_t len) |
101 | { | |
43cb76d9 | 102 | return store_bridge_parm(d, buf, len, set_hello_time); |
1da177e4 | 103 | } |
43cb76d9 GKH |
104 | static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time, |
105 | store_hello_time); | |
1da177e4 | 106 | |
43cb76d9 GKH |
107 | static ssize_t show_max_age(struct device *d, struct device_attribute *attr, |
108 | char *buf) | |
1da177e4 LT |
109 | { |
110 | return sprintf(buf, "%lu\n", | |
43cb76d9 | 111 | jiffies_to_clock_t(to_bridge(d)->max_age)); |
1da177e4 LT |
112 | } |
113 | ||
8d4698f7 | 114 | static int set_max_age(struct net_bridge *br, unsigned long val) |
1da177e4 LT |
115 | { |
116 | unsigned long t = clock_t_to_jiffies(val); | |
117 | br->max_age = t; | |
118 | if (br_is_root_bridge(br)) | |
119 | br->bridge_max_age = t; | |
8d4698f7 | 120 | return 0; |
1da177e4 LT |
121 | } |
122 | ||
43cb76d9 GKH |
123 | static ssize_t store_max_age(struct device *d, struct device_attribute *attr, |
124 | const char *buf, size_t len) | |
1da177e4 | 125 | { |
43cb76d9 | 126 | return store_bridge_parm(d, buf, len, set_max_age); |
1da177e4 | 127 | } |
43cb76d9 | 128 | static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age); |
1da177e4 | 129 | |
43cb76d9 GKH |
130 | static ssize_t show_ageing_time(struct device *d, |
131 | struct device_attribute *attr, char *buf) | |
1da177e4 | 132 | { |
43cb76d9 | 133 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
134 | return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time)); |
135 | } | |
136 | ||
8d4698f7 | 137 | static int set_ageing_time(struct net_bridge *br, unsigned long val) |
1da177e4 LT |
138 | { |
139 | br->ageing_time = clock_t_to_jiffies(val); | |
8d4698f7 | 140 | return 0; |
1da177e4 LT |
141 | } |
142 | ||
43cb76d9 GKH |
143 | static ssize_t store_ageing_time(struct device *d, |
144 | struct device_attribute *attr, | |
145 | const char *buf, size_t len) | |
1da177e4 | 146 | { |
43cb76d9 | 147 | return store_bridge_parm(d, buf, len, set_ageing_time); |
1da177e4 | 148 | } |
43cb76d9 GKH |
149 | static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time, |
150 | store_ageing_time); | |
1da177e4 | 151 | |
43cb76d9 GKH |
152 | static ssize_t show_stp_state(struct device *d, |
153 | struct device_attribute *attr, char *buf) | |
1da177e4 | 154 | { |
43cb76d9 | 155 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
156 | return sprintf(buf, "%d\n", br->stp_enabled); |
157 | } | |
158 | ||
1da177e4 | 159 | |
43cb76d9 GKH |
160 | static ssize_t store_stp_state(struct device *d, |
161 | struct device_attribute *attr, const char *buf, | |
162 | size_t len) | |
1da177e4 | 163 | { |
17120889 SH |
164 | struct net_bridge *br = to_bridge(d); |
165 | char *endp; | |
166 | unsigned long val; | |
167 | ||
168 | if (!capable(CAP_NET_ADMIN)) | |
169 | return -EPERM; | |
170 | ||
171 | val = simple_strtoul(buf, &endp, 0); | |
172 | if (endp == buf) | |
173 | return -EINVAL; | |
174 | ||
175 | rtnl_lock(); | |
176 | br_stp_set_enabled(br, val); | |
177 | rtnl_unlock(); | |
178 | ||
35b426c3 | 179 | return len; |
1da177e4 | 180 | } |
43cb76d9 GKH |
181 | static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state, |
182 | store_stp_state); | |
1da177e4 | 183 | |
43cb76d9 GKH |
184 | static ssize_t show_priority(struct device *d, struct device_attribute *attr, |
185 | char *buf) | |
1da177e4 | 186 | { |
43cb76d9 | 187 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
188 | return sprintf(buf, "%d\n", |
189 | (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]); | |
190 | } | |
191 | ||
8d4698f7 | 192 | static int set_priority(struct net_bridge *br, unsigned long val) |
1da177e4 LT |
193 | { |
194 | br_stp_set_bridge_priority(br, (u16) val); | |
8d4698f7 | 195 | return 0; |
1da177e4 LT |
196 | } |
197 | ||
43cb76d9 | 198 | static ssize_t store_priority(struct device *d, struct device_attribute *attr, |
1da177e4 LT |
199 | const char *buf, size_t len) |
200 | { | |
43cb76d9 | 201 | return store_bridge_parm(d, buf, len, set_priority); |
1da177e4 | 202 | } |
43cb76d9 | 203 | static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority); |
1da177e4 | 204 | |
43cb76d9 GKH |
205 | static ssize_t show_root_id(struct device *d, struct device_attribute *attr, |
206 | char *buf) | |
1da177e4 | 207 | { |
43cb76d9 | 208 | return br_show_bridge_id(buf, &to_bridge(d)->designated_root); |
1da177e4 | 209 | } |
43cb76d9 | 210 | static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL); |
1da177e4 | 211 | |
43cb76d9 GKH |
212 | static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr, |
213 | char *buf) | |
1da177e4 | 214 | { |
43cb76d9 | 215 | return br_show_bridge_id(buf, &to_bridge(d)->bridge_id); |
1da177e4 | 216 | } |
43cb76d9 | 217 | static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL); |
1da177e4 | 218 | |
43cb76d9 GKH |
219 | static ssize_t show_root_port(struct device *d, struct device_attribute *attr, |
220 | char *buf) | |
1da177e4 | 221 | { |
43cb76d9 | 222 | return sprintf(buf, "%d\n", to_bridge(d)->root_port); |
1da177e4 | 223 | } |
43cb76d9 | 224 | static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL); |
1da177e4 | 225 | |
43cb76d9 GKH |
226 | static ssize_t show_root_path_cost(struct device *d, |
227 | struct device_attribute *attr, char *buf) | |
1da177e4 | 228 | { |
43cb76d9 | 229 | return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost); |
1da177e4 | 230 | } |
43cb76d9 | 231 | static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL); |
1da177e4 | 232 | |
43cb76d9 GKH |
233 | static ssize_t show_topology_change(struct device *d, |
234 | struct device_attribute *attr, char *buf) | |
1da177e4 | 235 | { |
43cb76d9 | 236 | return sprintf(buf, "%d\n", to_bridge(d)->topology_change); |
1da177e4 | 237 | } |
43cb76d9 | 238 | static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL); |
1da177e4 | 239 | |
43cb76d9 GKH |
240 | static ssize_t show_topology_change_detected(struct device *d, |
241 | struct device_attribute *attr, | |
242 | char *buf) | |
1da177e4 | 243 | { |
43cb76d9 | 244 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
245 | return sprintf(buf, "%d\n", br->topology_change_detected); |
246 | } | |
43cb76d9 GKH |
247 | static DEVICE_ATTR(topology_change_detected, S_IRUGO, |
248 | show_topology_change_detected, NULL); | |
1da177e4 | 249 | |
43cb76d9 GKH |
250 | static ssize_t show_hello_timer(struct device *d, |
251 | struct device_attribute *attr, char *buf) | |
1da177e4 | 252 | { |
43cb76d9 | 253 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
254 | return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer)); |
255 | } | |
43cb76d9 | 256 | static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL); |
1da177e4 | 257 | |
43cb76d9 GKH |
258 | static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr, |
259 | char *buf) | |
1da177e4 | 260 | { |
43cb76d9 | 261 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
262 | return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer)); |
263 | } | |
43cb76d9 | 264 | static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL); |
1da177e4 | 265 | |
43cb76d9 GKH |
266 | static ssize_t show_topology_change_timer(struct device *d, |
267 | struct device_attribute *attr, | |
268 | char *buf) | |
1da177e4 | 269 | { |
43cb76d9 | 270 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
271 | return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer)); |
272 | } | |
43cb76d9 GKH |
273 | static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer, |
274 | NULL); | |
1da177e4 | 275 | |
43cb76d9 GKH |
276 | static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr, |
277 | char *buf) | |
1da177e4 | 278 | { |
43cb76d9 | 279 | struct net_bridge *br = to_bridge(d); |
1da177e4 LT |
280 | return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer)); |
281 | } | |
43cb76d9 | 282 | static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL); |
1da177e4 | 283 | |
43cb76d9 GKH |
284 | static ssize_t show_group_addr(struct device *d, |
285 | struct device_attribute *attr, char *buf) | |
fda93d92 | 286 | { |
43cb76d9 | 287 | struct net_bridge *br = to_bridge(d); |
fda93d92 SH |
288 | return sprintf(buf, "%x:%x:%x:%x:%x:%x\n", |
289 | br->group_addr[0], br->group_addr[1], | |
290 | br->group_addr[2], br->group_addr[3], | |
291 | br->group_addr[4], br->group_addr[5]); | |
292 | } | |
293 | ||
43cb76d9 GKH |
294 | static ssize_t store_group_addr(struct device *d, |
295 | struct device_attribute *attr, | |
296 | const char *buf, size_t len) | |
fda93d92 | 297 | { |
43cb76d9 | 298 | struct net_bridge *br = to_bridge(d); |
fda93d92 SH |
299 | unsigned new_addr[6]; |
300 | int i; | |
301 | ||
302 | if (!capable(CAP_NET_ADMIN)) | |
303 | return -EPERM; | |
304 | ||
305 | if (sscanf(buf, "%x:%x:%x:%x:%x:%x", | |
306 | &new_addr[0], &new_addr[1], &new_addr[2], | |
307 | &new_addr[3], &new_addr[4], &new_addr[5]) != 6) | |
308 | return -EINVAL; | |
309 | ||
310 | /* Must be 01:80:c2:00:00:0X */ | |
311 | for (i = 0; i < 5; i++) | |
312 | if (new_addr[i] != br_group_address[i]) | |
313 | return -EINVAL; | |
314 | ||
315 | if (new_addr[5] & ~0xf) | |
316 | return -EINVAL; | |
317 | ||
318 | if (new_addr[5] == 1 /* 802.3x Pause address */ | |
319 | || new_addr[5] == 2 /* 802.3ad Slow protocols */ | |
320 | || new_addr[5] == 3) /* 802.1X PAE address */ | |
321 | return -EINVAL; | |
322 | ||
323 | spin_lock_bh(&br->lock); | |
324 | for (i = 0; i < 6; i++) | |
325 | br->group_addr[i] = new_addr[i]; | |
326 | spin_unlock_bh(&br->lock); | |
327 | return len; | |
328 | } | |
329 | ||
43cb76d9 GKH |
330 | static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR, |
331 | show_group_addr, store_group_addr); | |
fda93d92 | 332 | |
9cf63747 SH |
333 | static ssize_t store_flush(struct device *d, |
334 | struct device_attribute *attr, | |
335 | const char *buf, size_t len) | |
336 | { | |
337 | struct net_bridge *br = to_bridge(d); | |
338 | ||
339 | if (!capable(CAP_NET_ADMIN)) | |
340 | return -EPERM; | |
341 | ||
342 | br_fdb_flush(br); | |
343 | return len; | |
344 | } | |
345 | static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush); | |
fda93d92 | 346 | |
1da177e4 | 347 | static struct attribute *bridge_attrs[] = { |
43cb76d9 GKH |
348 | &dev_attr_forward_delay.attr, |
349 | &dev_attr_hello_time.attr, | |
350 | &dev_attr_max_age.attr, | |
351 | &dev_attr_ageing_time.attr, | |
352 | &dev_attr_stp_state.attr, | |
353 | &dev_attr_priority.attr, | |
354 | &dev_attr_bridge_id.attr, | |
355 | &dev_attr_root_id.attr, | |
356 | &dev_attr_root_path_cost.attr, | |
357 | &dev_attr_root_port.attr, | |
358 | &dev_attr_topology_change.attr, | |
359 | &dev_attr_topology_change_detected.attr, | |
360 | &dev_attr_hello_timer.attr, | |
361 | &dev_attr_tcn_timer.attr, | |
362 | &dev_attr_topology_change_timer.attr, | |
363 | &dev_attr_gc_timer.attr, | |
364 | &dev_attr_group_addr.attr, | |
9cf63747 | 365 | &dev_attr_flush.attr, |
1da177e4 LT |
366 | NULL |
367 | }; | |
368 | ||
369 | static struct attribute_group bridge_group = { | |
370 | .name = SYSFS_BRIDGE_ATTR, | |
371 | .attrs = bridge_attrs, | |
372 | }; | |
373 | ||
374 | /* | |
375 | * Export the forwarding information table as a binary file | |
376 | * The records are struct __fdb_entry. | |
377 | * | |
378 | * Returns the number of bytes read. | |
379 | */ | |
91a69029 ZR |
380 | static ssize_t brforward_read(struct kobject *kobj, |
381 | struct bin_attribute *bin_attr, | |
382 | char *buf, loff_t off, size_t count) | |
1da177e4 | 383 | { |
43cb76d9 GKH |
384 | struct device *dev = to_dev(kobj); |
385 | struct net_bridge *br = to_bridge(dev); | |
1da177e4 LT |
386 | int n; |
387 | ||
388 | /* must read whole records */ | |
389 | if (off % sizeof(struct __fdb_entry) != 0) | |
390 | return -EINVAL; | |
391 | ||
9d6f229f | 392 | n = br_fdb_fillbuf(br, buf, |
1da177e4 LT |
393 | count / sizeof(struct __fdb_entry), |
394 | off / sizeof(struct __fdb_entry)); | |
395 | ||
396 | if (n > 0) | |
397 | n *= sizeof(struct __fdb_entry); | |
9d6f229f | 398 | |
1da177e4 LT |
399 | return n; |
400 | } | |
401 | ||
402 | static struct bin_attribute bridge_forward = { | |
403 | .attr = { .name = SYSFS_BRIDGE_FDB, | |
7b595756 | 404 | .mode = S_IRUGO, }, |
1da177e4 LT |
405 | .read = brforward_read, |
406 | }; | |
407 | ||
408 | /* | |
409 | * Add entries in sysfs onto the existing network class device | |
410 | * for the bridge. | |
411 | * Adds a attribute group "bridge" containing tuning parameters. | |
412 | * Binary attribute containing the forward table | |
413 | * Sub directory to hold links to interfaces. | |
414 | * | |
415 | * Note: the ifobj exists only to be a subdirectory | |
416 | * to hold links. The ifobj exists in same data structure | |
417 | * as it's parent the bridge so reference counting works. | |
418 | */ | |
419 | int br_sysfs_addbr(struct net_device *dev) | |
420 | { | |
43cb76d9 | 421 | struct kobject *brobj = &dev->dev.kobj; |
1da177e4 LT |
422 | struct net_bridge *br = netdev_priv(dev); |
423 | int err; | |
424 | ||
425 | err = sysfs_create_group(brobj, &bridge_group); | |
426 | if (err) { | |
427 | pr_info("%s: can't create group %s/%s\n", | |
0dc47877 | 428 | __func__, dev->name, bridge_group.name); |
1da177e4 LT |
429 | goto out1; |
430 | } | |
431 | ||
432 | err = sysfs_create_bin_file(brobj, &bridge_forward); | |
433 | if (err) { | |
1842c4be | 434 | pr_info("%s: can't create attribute file %s/%s\n", |
0dc47877 | 435 | __func__, dev->name, bridge_forward.attr.name); |
1da177e4 LT |
436 | goto out2; |
437 | } | |
438 | ||
43b98c4a GKH |
439 | br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj); |
440 | if (!br->ifobj) { | |
1da177e4 | 441 | pr_info("%s: can't add kobject (directory) %s/%s\n", |
0dc47877 | 442 | __func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR); |
1da177e4 LT |
443 | goto out3; |
444 | } | |
445 | return 0; | |
446 | out3: | |
43cb76d9 | 447 | sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward); |
1da177e4 | 448 | out2: |
43cb76d9 | 449 | sysfs_remove_group(&dev->dev.kobj, &bridge_group); |
1da177e4 LT |
450 | out1: |
451 | return err; | |
452 | ||
453 | } | |
454 | ||
455 | void br_sysfs_delbr(struct net_device *dev) | |
456 | { | |
43cb76d9 | 457 | struct kobject *kobj = &dev->dev.kobj; |
1da177e4 LT |
458 | struct net_bridge *br = netdev_priv(dev); |
459 | ||
78a2d906 | 460 | kobject_put(br->ifobj); |
1da177e4 LT |
461 | sysfs_remove_bin_file(kobj, &bridge_forward); |
462 | sysfs_remove_group(kobj, &bridge_group); | |
463 | } |