Kobject: change net/bridge to use kobject_create_and_add
[linux-2.6.git] / net / bridge / br_sysfs_br.c
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
14 #include <linux/capability.h>
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_dev(obj)     container_of(obj, struct device, kobj)
25 #define to_bridge(cd)   ((struct net_bridge *)(to_net_dev(cd)->priv))
26
27 /*
28  * Common code for storing bridge parameters.
29  */
30 static ssize_t store_bridge_parm(struct device *d,
31                                  const char *buf, size_t len,
32                                  void (*set)(struct net_bridge *, unsigned long))
33 {
34         struct net_bridge *br = to_bridge(d);
35         char *endp;
36         unsigned long val;
37
38         if (!capable(CAP_NET_ADMIN))
39                 return -EPERM;
40
41         val = simple_strtoul(buf, &endp, 0);
42         if (endp == buf)
43                 return -EINVAL;
44
45         spin_lock_bh(&br->lock);
46         (*set)(br, val);
47         spin_unlock_bh(&br->lock);
48         return len;
49 }
50
51
52 static ssize_t show_forward_delay(struct device *d,
53                                   struct device_attribute *attr, char *buf)
54 {
55         struct net_bridge *br = to_bridge(d);
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 device *d,
68                                    struct device_attribute *attr,
69                                    const char *buf, size_t len)
70 {
71         return store_bridge_parm(d, buf, len, set_forward_delay);
72 }
73 static DEVICE_ATTR(forward_delay, S_IRUGO | S_IWUSR,
74                    show_forward_delay, store_forward_delay);
75
76 static ssize_t show_hello_time(struct device *d, struct device_attribute *attr,
77                                char *buf)
78 {
79         return sprintf(buf, "%lu\n",
80                        jiffies_to_clock_t(to_bridge(d)->hello_time));
81 }
82
83 static void set_hello_time(struct net_bridge *br, unsigned long val)
84 {
85         unsigned long t = clock_t_to_jiffies(val);
86         br->hello_time = t;
87         if (br_is_root_bridge(br))
88                 br->bridge_hello_time = t;
89 }
90
91 static ssize_t store_hello_time(struct device *d,
92                                 struct device_attribute *attr, const char *buf,
93                                 size_t len)
94 {
95         return store_bridge_parm(d, buf, len, set_hello_time);
96 }
97 static DEVICE_ATTR(hello_time, S_IRUGO | S_IWUSR, show_hello_time,
98                    store_hello_time);
99
100 static ssize_t show_max_age(struct device *d, struct device_attribute *attr,
101                             char *buf)
102 {
103         return sprintf(buf, "%lu\n",
104                        jiffies_to_clock_t(to_bridge(d)->max_age));
105 }
106
107 static void set_max_age(struct net_bridge *br, unsigned long val)
108 {
109         unsigned long t = clock_t_to_jiffies(val);
110         br->max_age = t;
111         if (br_is_root_bridge(br))
112                 br->bridge_max_age = t;
113 }
114
115 static ssize_t store_max_age(struct device *d, struct device_attribute *attr,
116                              const char *buf, size_t len)
117 {
118         return store_bridge_parm(d, buf, len, set_max_age);
119 }
120 static DEVICE_ATTR(max_age, S_IRUGO | S_IWUSR, show_max_age, store_max_age);
121
122 static ssize_t show_ageing_time(struct device *d,
123                                 struct device_attribute *attr, char *buf)
124 {
125         struct net_bridge *br = to_bridge(d);
126         return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
127 }
128
129 static void set_ageing_time(struct net_bridge *br, unsigned long val)
130 {
131         br->ageing_time = clock_t_to_jiffies(val);
132 }
133
134 static ssize_t store_ageing_time(struct device *d,
135                                  struct device_attribute *attr,
136                                  const char *buf, size_t len)
137 {
138         return store_bridge_parm(d, buf, len, set_ageing_time);
139 }
140 static DEVICE_ATTR(ageing_time, S_IRUGO | S_IWUSR, show_ageing_time,
141                    store_ageing_time);
142
143 static ssize_t show_stp_state(struct device *d,
144                               struct device_attribute *attr, char *buf)
145 {
146         struct net_bridge *br = to_bridge(d);
147         return sprintf(buf, "%d\n", br->stp_enabled);
148 }
149
150
151 static ssize_t store_stp_state(struct device *d,
152                                struct device_attribute *attr, const char *buf,
153                                size_t len)
154 {
155         struct net_bridge *br = to_bridge(d);
156         char *endp;
157         unsigned long val;
158
159         if (!capable(CAP_NET_ADMIN))
160                 return -EPERM;
161
162         val = simple_strtoul(buf, &endp, 0);
163         if (endp == buf)
164                 return -EINVAL;
165
166         rtnl_lock();
167         br_stp_set_enabled(br, val);
168         rtnl_unlock();
169
170         return len;
171 }
172 static DEVICE_ATTR(stp_state, S_IRUGO | S_IWUSR, show_stp_state,
173                    store_stp_state);
174
175 static ssize_t show_priority(struct device *d, struct device_attribute *attr,
176                              char *buf)
177 {
178         struct net_bridge *br = to_bridge(d);
179         return sprintf(buf, "%d\n",
180                        (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
181 }
182
183 static void set_priority(struct net_bridge *br, unsigned long val)
184 {
185         br_stp_set_bridge_priority(br, (u16) val);
186 }
187
188 static ssize_t store_priority(struct device *d, struct device_attribute *attr,
189                                const char *buf, size_t len)
190 {
191         return store_bridge_parm(d, buf, len, set_priority);
192 }
193 static DEVICE_ATTR(priority, S_IRUGO | S_IWUSR, show_priority, store_priority);
194
195 static ssize_t show_root_id(struct device *d, struct device_attribute *attr,
196                             char *buf)
197 {
198         return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
199 }
200 static DEVICE_ATTR(root_id, S_IRUGO, show_root_id, NULL);
201
202 static ssize_t show_bridge_id(struct device *d, struct device_attribute *attr,
203                               char *buf)
204 {
205         return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
206 }
207 static DEVICE_ATTR(bridge_id, S_IRUGO, show_bridge_id, NULL);
208
209 static ssize_t show_root_port(struct device *d, struct device_attribute *attr,
210                               char *buf)
211 {
212         return sprintf(buf, "%d\n", to_bridge(d)->root_port);
213 }
214 static DEVICE_ATTR(root_port, S_IRUGO, show_root_port, NULL);
215
216 static ssize_t show_root_path_cost(struct device *d,
217                                    struct device_attribute *attr, char *buf)
218 {
219         return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
220 }
221 static DEVICE_ATTR(root_path_cost, S_IRUGO, show_root_path_cost, NULL);
222
223 static ssize_t show_topology_change(struct device *d,
224                                     struct device_attribute *attr, char *buf)
225 {
226         return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
227 }
228 static DEVICE_ATTR(topology_change, S_IRUGO, show_topology_change, NULL);
229
230 static ssize_t show_topology_change_detected(struct device *d,
231                                              struct device_attribute *attr,
232                                              char *buf)
233 {
234         struct net_bridge *br = to_bridge(d);
235         return sprintf(buf, "%d\n", br->topology_change_detected);
236 }
237 static DEVICE_ATTR(topology_change_detected, S_IRUGO,
238                    show_topology_change_detected, NULL);
239
240 static ssize_t show_hello_timer(struct device *d,
241                                 struct device_attribute *attr, char *buf)
242 {
243         struct net_bridge *br = to_bridge(d);
244         return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
245 }
246 static DEVICE_ATTR(hello_timer, S_IRUGO, show_hello_timer, NULL);
247
248 static ssize_t show_tcn_timer(struct device *d, struct device_attribute *attr,
249                               char *buf)
250 {
251         struct net_bridge *br = to_bridge(d);
252         return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
253 }
254 static DEVICE_ATTR(tcn_timer, S_IRUGO, show_tcn_timer, NULL);
255
256 static ssize_t show_topology_change_timer(struct device *d,
257                                           struct device_attribute *attr,
258                                           char *buf)
259 {
260         struct net_bridge *br = to_bridge(d);
261         return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
262 }
263 static DEVICE_ATTR(topology_change_timer, S_IRUGO, show_topology_change_timer,
264                    NULL);
265
266 static ssize_t show_gc_timer(struct device *d, struct device_attribute *attr,
267                              char *buf)
268 {
269         struct net_bridge *br = to_bridge(d);
270         return sprintf(buf, "%ld\n", br_timer_value(&br->gc_timer));
271 }
272 static DEVICE_ATTR(gc_timer, S_IRUGO, show_gc_timer, NULL);
273
274 static ssize_t show_group_addr(struct device *d,
275                                struct device_attribute *attr, char *buf)
276 {
277         struct net_bridge *br = to_bridge(d);
278         return sprintf(buf, "%x:%x:%x:%x:%x:%x\n",
279                        br->group_addr[0], br->group_addr[1],
280                        br->group_addr[2], br->group_addr[3],
281                        br->group_addr[4], br->group_addr[5]);
282 }
283
284 static ssize_t store_group_addr(struct device *d,
285                                 struct device_attribute *attr,
286                                 const char *buf, size_t len)
287 {
288         struct net_bridge *br = to_bridge(d);
289         unsigned new_addr[6];
290         int i;
291
292         if (!capable(CAP_NET_ADMIN))
293                 return -EPERM;
294
295         if (sscanf(buf, "%x:%x:%x:%x:%x:%x",
296                    &new_addr[0], &new_addr[1], &new_addr[2],
297                    &new_addr[3], &new_addr[4], &new_addr[5]) != 6)
298                 return -EINVAL;
299
300         /* Must be 01:80:c2:00:00:0X */
301         for (i = 0; i < 5; i++)
302                 if (new_addr[i] != br_group_address[i])
303                         return -EINVAL;
304
305         if (new_addr[5] & ~0xf)
306                 return -EINVAL;
307
308         if (new_addr[5] == 1    /* 802.3x Pause address */
309             || new_addr[5] == 2 /* 802.3ad Slow protocols */
310             || new_addr[5] == 3) /* 802.1X PAE address */
311                 return -EINVAL;
312
313         spin_lock_bh(&br->lock);
314         for (i = 0; i < 6; i++)
315                 br->group_addr[i] = new_addr[i];
316         spin_unlock_bh(&br->lock);
317         return len;
318 }
319
320 static DEVICE_ATTR(group_addr, S_IRUGO | S_IWUSR,
321                    show_group_addr, store_group_addr);
322
323 static ssize_t store_flush(struct device *d,
324                            struct device_attribute *attr,
325                            const char *buf, size_t len)
326 {
327         struct net_bridge *br = to_bridge(d);
328
329         if (!capable(CAP_NET_ADMIN))
330                 return -EPERM;
331
332         br_fdb_flush(br);
333         return len;
334 }
335 static DEVICE_ATTR(flush, S_IWUSR, NULL, store_flush);
336
337 static struct attribute *bridge_attrs[] = {
338         &dev_attr_forward_delay.attr,
339         &dev_attr_hello_time.attr,
340         &dev_attr_max_age.attr,
341         &dev_attr_ageing_time.attr,
342         &dev_attr_stp_state.attr,
343         &dev_attr_priority.attr,
344         &dev_attr_bridge_id.attr,
345         &dev_attr_root_id.attr,
346         &dev_attr_root_path_cost.attr,
347         &dev_attr_root_port.attr,
348         &dev_attr_topology_change.attr,
349         &dev_attr_topology_change_detected.attr,
350         &dev_attr_hello_timer.attr,
351         &dev_attr_tcn_timer.attr,
352         &dev_attr_topology_change_timer.attr,
353         &dev_attr_gc_timer.attr,
354         &dev_attr_group_addr.attr,
355         &dev_attr_flush.attr,
356         NULL
357 };
358
359 static struct attribute_group bridge_group = {
360         .name = SYSFS_BRIDGE_ATTR,
361         .attrs = bridge_attrs,
362 };
363
364 /*
365  * Export the forwarding information table as a binary file
366  * The records are struct __fdb_entry.
367  *
368  * Returns the number of bytes read.
369  */
370 static ssize_t brforward_read(struct kobject *kobj,
371                               struct bin_attribute *bin_attr,
372                               char *buf, loff_t off, size_t count)
373 {
374         struct device *dev = to_dev(kobj);
375         struct net_bridge *br = to_bridge(dev);
376         int n;
377
378         /* must read whole records */
379         if (off % sizeof(struct __fdb_entry) != 0)
380                 return -EINVAL;
381
382         n =  br_fdb_fillbuf(br, buf,
383                             count / sizeof(struct __fdb_entry),
384                             off / sizeof(struct __fdb_entry));
385
386         if (n > 0)
387                 n *= sizeof(struct __fdb_entry);
388
389         return n;
390 }
391
392 static struct bin_attribute bridge_forward = {
393         .attr = { .name = SYSFS_BRIDGE_FDB,
394                   .mode = S_IRUGO, },
395         .read = brforward_read,
396 };
397
398 /*
399  * Add entries in sysfs onto the existing network class device
400  * for the bridge.
401  *   Adds a attribute group "bridge" containing tuning parameters.
402  *   Binary attribute containing the forward table
403  *   Sub directory to hold links to interfaces.
404  *
405  * Note: the ifobj exists only to be a subdirectory
406  *   to hold links.  The ifobj exists in same data structure
407  *   as it's parent the bridge so reference counting works.
408  */
409 int br_sysfs_addbr(struct net_device *dev)
410 {
411         struct kobject *brobj = &dev->dev.kobj;
412         struct net_bridge *br = netdev_priv(dev);
413         int err;
414
415         err = sysfs_create_group(brobj, &bridge_group);
416         if (err) {
417                 pr_info("%s: can't create group %s/%s\n",
418                         __FUNCTION__, dev->name, bridge_group.name);
419                 goto out1;
420         }
421
422         err = sysfs_create_bin_file(brobj, &bridge_forward);
423         if (err) {
424                 pr_info("%s: can't create attribute file %s/%s\n",
425                         __FUNCTION__, dev->name, bridge_forward.attr.name);
426                 goto out2;
427         }
428
429         br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
430         if (!br->ifobj) {
431                 pr_info("%s: can't add kobject (directory) %s/%s\n",
432                         __FUNCTION__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
433                 goto out3;
434         }
435         return 0;
436  out3:
437         sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
438  out2:
439         sysfs_remove_group(&dev->dev.kobj, &bridge_group);
440  out1:
441         return err;
442
443 }
444
445 void br_sysfs_delbr(struct net_device *dev)
446 {
447         struct kobject *kobj = &dev->dev.kobj;
448         struct net_bridge *br = netdev_priv(dev);
449
450         kobject_unregister(br->ifobj);
451         sysfs_remove_bin_file(kobj, &bridge_forward);
452         sysfs_remove_group(kobj, &bridge_group);
453 }