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1 | /* | |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/capability.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/if_arp.h> | |
16 | #include <net/sock.h> | |
17 | #include <linux/rtnetlink.h> | |
18 | #include <linux/wireless.h> | |
19 | #include <net/wext.h> | |
20 | ||
21 | #include "net-sysfs.h" | |
22 | ||
23 | #ifdef CONFIG_SYSFS | |
24 | static const char fmt_hex[] = "%#x\n"; | |
25 | static const char fmt_long_hex[] = "%#lx\n"; | |
26 | static const char fmt_dec[] = "%d\n"; | |
27 | static const char fmt_ulong[] = "%lu\n"; | |
28 | ||
29 | static inline int dev_isalive(const struct net_device *dev) | |
30 | { | |
31 | return dev->reg_state <= NETREG_REGISTERED; | |
32 | } | |
33 | ||
34 | /* use same locking rules as GIF* ioctl's */ | |
35 | static ssize_t netdev_show(const struct device *dev, | |
36 | struct device_attribute *attr, char *buf, | |
37 | ssize_t (*format)(const struct net_device *, char *)) | |
38 | { | |
39 | struct net_device *net = to_net_dev(dev); | |
40 | ssize_t ret = -EINVAL; | |
41 | ||
42 | read_lock(&dev_base_lock); | |
43 | if (dev_isalive(net)) | |
44 | ret = (*format)(net, buf); | |
45 | read_unlock(&dev_base_lock); | |
46 | ||
47 | return ret; | |
48 | } | |
49 | ||
50 | /* generate a show function for simple field */ | |
51 | #define NETDEVICE_SHOW(field, format_string) \ | |
52 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
53 | { \ | |
54 | return sprintf(buf, format_string, net->field); \ | |
55 | } \ | |
56 | static ssize_t show_##field(struct device *dev, \ | |
57 | struct device_attribute *attr, char *buf) \ | |
58 | { \ | |
59 | return netdev_show(dev, attr, buf, format_##field); \ | |
60 | } | |
61 | ||
62 | ||
63 | /* use same locking and permission rules as SIF* ioctl's */ | |
64 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, | |
65 | const char *buf, size_t len, | |
66 | int (*set)(struct net_device *, unsigned long)) | |
67 | { | |
68 | struct net_device *net = to_net_dev(dev); | |
69 | char *endp; | |
70 | unsigned long new; | |
71 | int ret = -EINVAL; | |
72 | ||
73 | if (!capable(CAP_NET_ADMIN)) | |
74 | return -EPERM; | |
75 | ||
76 | new = simple_strtoul(buf, &endp, 0); | |
77 | if (endp == buf) | |
78 | goto err; | |
79 | ||
80 | if (!rtnl_trylock()) | |
81 | return restart_syscall(); | |
82 | ||
83 | if (dev_isalive(net)) { | |
84 | if ((ret = (*set)(net, new)) == 0) | |
85 | ret = len; | |
86 | } | |
87 | rtnl_unlock(); | |
88 | err: | |
89 | return ret; | |
90 | } | |
91 | ||
92 | NETDEVICE_SHOW(dev_id, fmt_hex); | |
93 | NETDEVICE_SHOW(addr_len, fmt_dec); | |
94 | NETDEVICE_SHOW(iflink, fmt_dec); | |
95 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
96 | NETDEVICE_SHOW(features, fmt_long_hex); | |
97 | NETDEVICE_SHOW(type, fmt_dec); | |
98 | NETDEVICE_SHOW(link_mode, fmt_dec); | |
99 | ||
100 | /* use same locking rules as GIFHWADDR ioctl's */ | |
101 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, | |
102 | char *buf) | |
103 | { | |
104 | struct net_device *net = to_net_dev(dev); | |
105 | ssize_t ret = -EINVAL; | |
106 | ||
107 | read_lock(&dev_base_lock); | |
108 | if (dev_isalive(net)) | |
109 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); | |
110 | read_unlock(&dev_base_lock); | |
111 | return ret; | |
112 | } | |
113 | ||
114 | static ssize_t show_broadcast(struct device *dev, | |
115 | struct device_attribute *attr, char *buf) | |
116 | { | |
117 | struct net_device *net = to_net_dev(dev); | |
118 | if (dev_isalive(net)) | |
119 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | static ssize_t show_carrier(struct device *dev, | |
124 | struct device_attribute *attr, char *buf) | |
125 | { | |
126 | struct net_device *netdev = to_net_dev(dev); | |
127 | if (netif_running(netdev)) { | |
128 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
129 | } | |
130 | return -EINVAL; | |
131 | } | |
132 | ||
133 | static ssize_t show_speed(struct device *dev, | |
134 | struct device_attribute *attr, char *buf) | |
135 | { | |
136 | struct net_device *netdev = to_net_dev(dev); | |
137 | int ret = -EINVAL; | |
138 | ||
139 | if (!rtnl_trylock()) | |
140 | return restart_syscall(); | |
141 | ||
142 | if (netif_running(netdev) && | |
143 | netdev->ethtool_ops && | |
144 | netdev->ethtool_ops->get_settings) { | |
145 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; | |
146 | ||
147 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
148 | ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd)); | |
149 | } | |
150 | rtnl_unlock(); | |
151 | return ret; | |
152 | } | |
153 | ||
154 | static ssize_t show_duplex(struct device *dev, | |
155 | struct device_attribute *attr, char *buf) | |
156 | { | |
157 | struct net_device *netdev = to_net_dev(dev); | |
158 | int ret = -EINVAL; | |
159 | ||
160 | if (!rtnl_trylock()) | |
161 | return restart_syscall(); | |
162 | ||
163 | if (netif_running(netdev) && | |
164 | netdev->ethtool_ops && | |
165 | netdev->ethtool_ops->get_settings) { | |
166 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; | |
167 | ||
168 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
169 | ret = sprintf(buf, "%s\n", cmd.duplex ? "full" : "half"); | |
170 | } | |
171 | rtnl_unlock(); | |
172 | return ret; | |
173 | } | |
174 | ||
175 | static ssize_t show_dormant(struct device *dev, | |
176 | struct device_attribute *attr, char *buf) | |
177 | { | |
178 | struct net_device *netdev = to_net_dev(dev); | |
179 | ||
180 | if (netif_running(netdev)) | |
181 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
182 | ||
183 | return -EINVAL; | |
184 | } | |
185 | ||
186 | static const char *const operstates[] = { | |
187 | "unknown", | |
188 | "notpresent", /* currently unused */ | |
189 | "down", | |
190 | "lowerlayerdown", | |
191 | "testing", /* currently unused */ | |
192 | "dormant", | |
193 | "up" | |
194 | }; | |
195 | ||
196 | static ssize_t show_operstate(struct device *dev, | |
197 | struct device_attribute *attr, char *buf) | |
198 | { | |
199 | const struct net_device *netdev = to_net_dev(dev); | |
200 | unsigned char operstate; | |
201 | ||
202 | read_lock(&dev_base_lock); | |
203 | operstate = netdev->operstate; | |
204 | if (!netif_running(netdev)) | |
205 | operstate = IF_OPER_DOWN; | |
206 | read_unlock(&dev_base_lock); | |
207 | ||
208 | if (operstate >= ARRAY_SIZE(operstates)) | |
209 | return -EINVAL; /* should not happen */ | |
210 | ||
211 | return sprintf(buf, "%s\n", operstates[operstate]); | |
212 | } | |
213 | ||
214 | /* read-write attributes */ | |
215 | NETDEVICE_SHOW(mtu, fmt_dec); | |
216 | ||
217 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
218 | { | |
219 | return dev_set_mtu(net, (int) new_mtu); | |
220 | } | |
221 | ||
222 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, | |
223 | const char *buf, size_t len) | |
224 | { | |
225 | return netdev_store(dev, attr, buf, len, change_mtu); | |
226 | } | |
227 | ||
228 | NETDEVICE_SHOW(flags, fmt_hex); | |
229 | ||
230 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
231 | { | |
232 | return dev_change_flags(net, (unsigned) new_flags); | |
233 | } | |
234 | ||
235 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, | |
236 | const char *buf, size_t len) | |
237 | { | |
238 | return netdev_store(dev, attr, buf, len, change_flags); | |
239 | } | |
240 | ||
241 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); | |
242 | ||
243 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
244 | { | |
245 | net->tx_queue_len = new_len; | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static ssize_t store_tx_queue_len(struct device *dev, | |
250 | struct device_attribute *attr, | |
251 | const char *buf, size_t len) | |
252 | { | |
253 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); | |
254 | } | |
255 | ||
256 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, | |
257 | const char *buf, size_t len) | |
258 | { | |
259 | struct net_device *netdev = to_net_dev(dev); | |
260 | size_t count = len; | |
261 | ssize_t ret; | |
262 | ||
263 | if (!capable(CAP_NET_ADMIN)) | |
264 | return -EPERM; | |
265 | ||
266 | /* ignore trailing newline */ | |
267 | if (len > 0 && buf[len - 1] == '\n') | |
268 | --count; | |
269 | ||
270 | if (!rtnl_trylock()) | |
271 | return restart_syscall(); | |
272 | ret = dev_set_alias(netdev, buf, count); | |
273 | rtnl_unlock(); | |
274 | ||
275 | return ret < 0 ? ret : len; | |
276 | } | |
277 | ||
278 | static ssize_t show_ifalias(struct device *dev, | |
279 | struct device_attribute *attr, char *buf) | |
280 | { | |
281 | const struct net_device *netdev = to_net_dev(dev); | |
282 | ssize_t ret = 0; | |
283 | ||
284 | if (!rtnl_trylock()) | |
285 | return restart_syscall(); | |
286 | if (netdev->ifalias) | |
287 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
288 | rtnl_unlock(); | |
289 | return ret; | |
290 | } | |
291 | ||
292 | static struct device_attribute net_class_attributes[] = { | |
293 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), | |
294 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), | |
295 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), | |
296 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), | |
297 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
298 | __ATTR(features, S_IRUGO, show_features, NULL), | |
299 | __ATTR(type, S_IRUGO, show_type, NULL), | |
300 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), | |
301 | __ATTR(address, S_IRUGO, show_address, NULL), | |
302 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
303 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
304 | __ATTR(speed, S_IRUGO, show_speed, NULL), | |
305 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
306 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), | |
307 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
308 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), | |
309 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
310 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
311 | store_tx_queue_len), | |
312 | {} | |
313 | }; | |
314 | ||
315 | /* Show a given an attribute in the statistics group */ | |
316 | static ssize_t netstat_show(const struct device *d, | |
317 | struct device_attribute *attr, char *buf, | |
318 | unsigned long offset) | |
319 | { | |
320 | struct net_device *dev = to_net_dev(d); | |
321 | ssize_t ret = -EINVAL; | |
322 | ||
323 | WARN_ON(offset > sizeof(struct net_device_stats) || | |
324 | offset % sizeof(unsigned long) != 0); | |
325 | ||
326 | read_lock(&dev_base_lock); | |
327 | if (dev_isalive(dev)) { | |
328 | const struct net_device_stats *stats = dev_get_stats(dev); | |
329 | ret = sprintf(buf, fmt_ulong, | |
330 | *(unsigned long *)(((u8 *) stats) + offset)); | |
331 | } | |
332 | read_unlock(&dev_base_lock); | |
333 | return ret; | |
334 | } | |
335 | ||
336 | /* generate a read-only statistics attribute */ | |
337 | #define NETSTAT_ENTRY(name) \ | |
338 | static ssize_t show_##name(struct device *d, \ | |
339 | struct device_attribute *attr, char *buf) \ | |
340 | { \ | |
341 | return netstat_show(d, attr, buf, \ | |
342 | offsetof(struct net_device_stats, name)); \ | |
343 | } \ | |
344 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) | |
345 | ||
346 | NETSTAT_ENTRY(rx_packets); | |
347 | NETSTAT_ENTRY(tx_packets); | |
348 | NETSTAT_ENTRY(rx_bytes); | |
349 | NETSTAT_ENTRY(tx_bytes); | |
350 | NETSTAT_ENTRY(rx_errors); | |
351 | NETSTAT_ENTRY(tx_errors); | |
352 | NETSTAT_ENTRY(rx_dropped); | |
353 | NETSTAT_ENTRY(tx_dropped); | |
354 | NETSTAT_ENTRY(multicast); | |
355 | NETSTAT_ENTRY(collisions); | |
356 | NETSTAT_ENTRY(rx_length_errors); | |
357 | NETSTAT_ENTRY(rx_over_errors); | |
358 | NETSTAT_ENTRY(rx_crc_errors); | |
359 | NETSTAT_ENTRY(rx_frame_errors); | |
360 | NETSTAT_ENTRY(rx_fifo_errors); | |
361 | NETSTAT_ENTRY(rx_missed_errors); | |
362 | NETSTAT_ENTRY(tx_aborted_errors); | |
363 | NETSTAT_ENTRY(tx_carrier_errors); | |
364 | NETSTAT_ENTRY(tx_fifo_errors); | |
365 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
366 | NETSTAT_ENTRY(tx_window_errors); | |
367 | NETSTAT_ENTRY(rx_compressed); | |
368 | NETSTAT_ENTRY(tx_compressed); | |
369 | ||
370 | static struct attribute *netstat_attrs[] = { | |
371 | &dev_attr_rx_packets.attr, | |
372 | &dev_attr_tx_packets.attr, | |
373 | &dev_attr_rx_bytes.attr, | |
374 | &dev_attr_tx_bytes.attr, | |
375 | &dev_attr_rx_errors.attr, | |
376 | &dev_attr_tx_errors.attr, | |
377 | &dev_attr_rx_dropped.attr, | |
378 | &dev_attr_tx_dropped.attr, | |
379 | &dev_attr_multicast.attr, | |
380 | &dev_attr_collisions.attr, | |
381 | &dev_attr_rx_length_errors.attr, | |
382 | &dev_attr_rx_over_errors.attr, | |
383 | &dev_attr_rx_crc_errors.attr, | |
384 | &dev_attr_rx_frame_errors.attr, | |
385 | &dev_attr_rx_fifo_errors.attr, | |
386 | &dev_attr_rx_missed_errors.attr, | |
387 | &dev_attr_tx_aborted_errors.attr, | |
388 | &dev_attr_tx_carrier_errors.attr, | |
389 | &dev_attr_tx_fifo_errors.attr, | |
390 | &dev_attr_tx_heartbeat_errors.attr, | |
391 | &dev_attr_tx_window_errors.attr, | |
392 | &dev_attr_rx_compressed.attr, | |
393 | &dev_attr_tx_compressed.attr, | |
394 | NULL | |
395 | }; | |
396 | ||
397 | ||
398 | static struct attribute_group netstat_group = { | |
399 | .name = "statistics", | |
400 | .attrs = netstat_attrs, | |
401 | }; | |
402 | ||
403 | #ifdef CONFIG_WIRELESS_EXT_SYSFS | |
404 | /* helper function that does all the locking etc for wireless stats */ | |
405 | static ssize_t wireless_show(struct device *d, char *buf, | |
406 | ssize_t (*format)(const struct iw_statistics *, | |
407 | char *)) | |
408 | { | |
409 | struct net_device *dev = to_net_dev(d); | |
410 | const struct iw_statistics *iw; | |
411 | ssize_t ret = -EINVAL; | |
412 | ||
413 | rtnl_lock(); | |
414 | if (dev_isalive(dev)) { | |
415 | iw = get_wireless_stats(dev); | |
416 | if (iw) | |
417 | ret = (*format)(iw, buf); | |
418 | } | |
419 | rtnl_unlock(); | |
420 | ||
421 | return ret; | |
422 | } | |
423 | ||
424 | /* show function template for wireless fields */ | |
425 | #define WIRELESS_SHOW(name, field, format_string) \ | |
426 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
427 | { \ | |
428 | return sprintf(buf, format_string, iw->field); \ | |
429 | } \ | |
430 | static ssize_t show_iw_##name(struct device *d, \ | |
431 | struct device_attribute *attr, char *buf) \ | |
432 | { \ | |
433 | return wireless_show(d, buf, format_iw_##name); \ | |
434 | } \ | |
435 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) | |
436 | ||
437 | WIRELESS_SHOW(status, status, fmt_hex); | |
438 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
439 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
440 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
441 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
442 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
443 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
444 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
445 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
446 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
447 | ||
448 | static struct attribute *wireless_attrs[] = { | |
449 | &dev_attr_status.attr, | |
450 | &dev_attr_link.attr, | |
451 | &dev_attr_level.attr, | |
452 | &dev_attr_noise.attr, | |
453 | &dev_attr_nwid.attr, | |
454 | &dev_attr_crypt.attr, | |
455 | &dev_attr_fragment.attr, | |
456 | &dev_attr_retries.attr, | |
457 | &dev_attr_misc.attr, | |
458 | &dev_attr_beacon.attr, | |
459 | NULL | |
460 | }; | |
461 | ||
462 | static struct attribute_group wireless_group = { | |
463 | .name = "wireless", | |
464 | .attrs = wireless_attrs, | |
465 | }; | |
466 | #endif | |
467 | ||
468 | #endif /* CONFIG_SYSFS */ | |
469 | ||
470 | #ifdef CONFIG_HOTPLUG | |
471 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) | |
472 | { | |
473 | struct net_device *dev = to_net_dev(d); | |
474 | int retval; | |
475 | ||
476 | if (!net_eq(dev_net(dev), &init_net)) | |
477 | return 0; | |
478 | ||
479 | /* pass interface to uevent. */ | |
480 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); | |
481 | if (retval) | |
482 | goto exit; | |
483 | ||
484 | /* pass ifindex to uevent. | |
485 | * ifindex is useful as it won't change (interface name may change) | |
486 | * and is what RtNetlink uses natively. */ | |
487 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); | |
488 | ||
489 | exit: | |
490 | return retval; | |
491 | } | |
492 | #endif | |
493 | ||
494 | /* | |
495 | * netdev_release -- destroy and free a dead device. | |
496 | * Called when last reference to device kobject is gone. | |
497 | */ | |
498 | static void netdev_release(struct device *d) | |
499 | { | |
500 | struct net_device *dev = to_net_dev(d); | |
501 | ||
502 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
503 | ||
504 | kfree(dev->ifalias); | |
505 | kfree((char *)dev - dev->padded); | |
506 | } | |
507 | ||
508 | static struct class net_class = { | |
509 | .name = "net", | |
510 | .dev_release = netdev_release, | |
511 | #ifdef CONFIG_SYSFS | |
512 | .dev_attrs = net_class_attributes, | |
513 | #endif /* CONFIG_SYSFS */ | |
514 | #ifdef CONFIG_HOTPLUG | |
515 | .dev_uevent = netdev_uevent, | |
516 | #endif | |
517 | }; | |
518 | ||
519 | /* Delete sysfs entries but hold kobject reference until after all | |
520 | * netdev references are gone. | |
521 | */ | |
522 | void netdev_unregister_kobject(struct net_device * net) | |
523 | { | |
524 | struct device *dev = &(net->dev); | |
525 | ||
526 | kobject_get(&dev->kobj); | |
527 | ||
528 | if (dev_net(net) != &init_net) | |
529 | return; | |
530 | ||
531 | device_del(dev); | |
532 | } | |
533 | ||
534 | /* Create sysfs entries for network device. */ | |
535 | int netdev_register_kobject(struct net_device *net) | |
536 | { | |
537 | struct device *dev = &(net->dev); | |
538 | const struct attribute_group **groups = net->sysfs_groups; | |
539 | ||
540 | dev->class = &net_class; | |
541 | dev->platform_data = net; | |
542 | dev->groups = groups; | |
543 | ||
544 | dev_set_name(dev, "%s", net->name); | |
545 | ||
546 | #ifdef CONFIG_SYSFS | |
547 | /* Allow for a device specific group */ | |
548 | if (*groups) | |
549 | groups++; | |
550 | ||
551 | *groups++ = &netstat_group; | |
552 | #ifdef CONFIG_WIRELESS_EXT_SYSFS | |
553 | if (net->ieee80211_ptr) | |
554 | *groups++ = &wireless_group; | |
555 | #ifdef CONFIG_WIRELESS_EXT | |
556 | else if (net->wireless_handlers) | |
557 | *groups++ = &wireless_group; | |
558 | #endif | |
559 | #endif | |
560 | #endif /* CONFIG_SYSFS */ | |
561 | ||
562 | if (dev_net(net) != &init_net) | |
563 | return 0; | |
564 | ||
565 | return device_add(dev); | |
566 | } | |
567 | ||
568 | int netdev_class_create_file(struct class_attribute *class_attr) | |
569 | { | |
570 | return class_create_file(&net_class, class_attr); | |
571 | } | |
572 | ||
573 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
574 | { | |
575 | class_remove_file(&net_class, class_attr); | |
576 | } | |
577 | ||
578 | EXPORT_SYMBOL(netdev_class_create_file); | |
579 | EXPORT_SYMBOL(netdev_class_remove_file); | |
580 | ||
581 | void netdev_initialize_kobject(struct net_device *net) | |
582 | { | |
583 | struct device *device = &(net->dev); | |
584 | device_initialize(device); | |
585 | } | |
586 | ||
587 | int netdev_kobject_init(void) | |
588 | { | |
589 | return class_register(&net_class); | |
590 | } |