Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
4ec93edb | 5 | * |
1da177e4 LT |
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 | ||
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
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> | |
8f1546ca | 19 | #include <net/wext.h> |
1da177e4 | 20 | |
342709ef PE |
21 | #include "net-sysfs.h" |
22 | ||
8b41d188 | 23 | #ifdef CONFIG_SYSFS |
1da177e4 | 24 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 25 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 LT |
26 | static const char fmt_dec[] = "%d\n"; |
27 | static const char fmt_ulong[] = "%lu\n"; | |
28 | ||
4ec93edb | 29 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 30 | { |
fe9925b5 | 31 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
32 | } |
33 | ||
34 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
35 | static ssize_t netdev_show(const struct device *dev, |
36 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
37 | ssize_t (*format)(const struct net_device *, char *)) |
38 | { | |
43cb76d9 | 39 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
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 | } \ | |
43cb76d9 GKH |
56 | static ssize_t show_##field(struct device *dev, \ |
57 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 58 | { \ |
43cb76d9 | 59 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
60 | } |
61 | ||
62 | ||
63 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 64 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
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 | ||
5a5990d3 | 80 | if (!rtnl_trylock()) |
336ca57c | 81 | return restart_syscall(); |
5a5990d3 | 82 | |
1da177e4 LT |
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 | ||
9d29672c | 92 | NETDEVICE_SHOW(dev_id, fmt_hex); |
fd586bac KS |
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); | |
b00055aa | 98 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
99 | |
100 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
101 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
102 | char *buf) | |
1da177e4 LT |
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)) | |
7ffc49a6 | 109 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
110 | read_unlock(&dev_base_lock); |
111 | return ret; | |
112 | } | |
113 | ||
43cb76d9 GKH |
114 | static ssize_t show_broadcast(struct device *dev, |
115 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
116 | { |
117 | struct net_device *net = to_net_dev(dev); | |
118 | if (dev_isalive(net)) | |
7ffc49a6 | 119 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
120 | return -EINVAL; |
121 | } | |
122 | ||
43cb76d9 GKH |
123 | static ssize_t show_carrier(struct device *dev, |
124 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
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 | ||
d519e17e AG |
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 | ||
ac5e3af9 ED |
142 | if (netif_running(netdev) && |
143 | netdev->ethtool_ops && | |
144 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
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 | ||
ac5e3af9 ED |
163 | if (netif_running(netdev) && |
164 | netdev->ethtool_ops && | |
165 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
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 | ||
43cb76d9 GKH |
175 | static ssize_t show_dormant(struct device *dev, |
176 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
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 | ||
36cbd3dc | 186 | static const char *const operstates[] = { |
b00055aa SR |
187 | "unknown", |
188 | "notpresent", /* currently unused */ | |
189 | "down", | |
190 | "lowerlayerdown", | |
191 | "testing", /* currently unused */ | |
192 | "dormant", | |
193 | "up" | |
194 | }; | |
195 | ||
43cb76d9 GKH |
196 | static ssize_t show_operstate(struct device *dev, |
197 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
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 | ||
e3a5cd9e | 208 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
209 | return -EINVAL; /* should not happen */ |
210 | ||
211 | return sprintf(buf, "%s\n", operstates[operstate]); | |
212 | } | |
213 | ||
1da177e4 LT |
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 | ||
43cb76d9 GKH |
222 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
223 | const char *buf, size_t len) | |
1da177e4 | 224 | { |
43cb76d9 | 225 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
226 | } |
227 | ||
1da177e4 LT |
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 | ||
43cb76d9 GKH |
235 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
236 | const char *buf, size_t len) | |
1da177e4 | 237 | { |
43cb76d9 | 238 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
239 | } |
240 | ||
1da177e4 LT |
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 | ||
43cb76d9 GKH |
249 | static ssize_t store_tx_queue_len(struct device *dev, |
250 | struct device_attribute *attr, | |
251 | const char *buf, size_t len) | |
1da177e4 | 252 | { |
43cb76d9 | 253 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
254 | } |
255 | ||
0b815a1a SH |
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 | ||
336ca57c EB |
270 | if (!rtnl_trylock()) |
271 | return restart_syscall(); | |
0b815a1a SH |
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 | ||
336ca57c EB |
284 | if (!rtnl_trylock()) |
285 | return restart_syscall(); | |
0b815a1a SH |
286 | if (netdev->ifalias) |
287 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
288 | rtnl_unlock(); | |
289 | return ret; | |
290 | } | |
291 | ||
43cb76d9 | 292 | static struct device_attribute net_class_attributes[] = { |
fd586bac | 293 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 294 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 295 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
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), | |
b00055aa | 300 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
301 | __ATTR(address, S_IRUGO, show_address, NULL), |
302 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
303 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
304 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
305 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
306 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
307 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
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), | |
fd586bac | 312 | {} |
1da177e4 LT |
313 | }; |
314 | ||
315 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
316 | static ssize_t netstat_show(const struct device *d, |
317 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
318 | unsigned long offset) |
319 | { | |
43cb76d9 | 320 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
321 | ssize_t ret = -EINVAL; |
322 | ||
df1b86c5 PE |
323 | WARN_ON(offset > sizeof(struct net_device_stats) || |
324 | offset % sizeof(unsigned long) != 0); | |
1da177e4 LT |
325 | |
326 | read_lock(&dev_base_lock); | |
96e74088 | 327 | if (dev_isalive(dev)) { |
eeda3fd6 | 328 | const struct net_device_stats *stats = dev_get_stats(dev); |
1da177e4 LT |
329 | ret = sprintf(buf, fmt_ulong, |
330 | *(unsigned long *)(((u8 *) stats) + offset)); | |
96e74088 | 331 | } |
1da177e4 LT |
332 | read_unlock(&dev_base_lock); |
333 | return ret; | |
334 | } | |
335 | ||
336 | /* generate a read-only statistics attribute */ | |
337 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
338 | static ssize_t show_##name(struct device *d, \ |
339 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 340 | { \ |
43cb76d9 | 341 | return netstat_show(d, attr, buf, \ |
1da177e4 LT |
342 | offsetof(struct net_device_stats, name)); \ |
343 | } \ | |
43cb76d9 | 344 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
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[] = { | |
43cb76d9 GKH |
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, | |
1da177e4 LT |
394 | NULL |
395 | }; | |
396 | ||
397 | ||
398 | static struct attribute_group netstat_group = { | |
399 | .name = "statistics", | |
400 | .attrs = netstat_attrs, | |
401 | }; | |
402 | ||
22bb1be4 | 403 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 404 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 405 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
406 | ssize_t (*format)(const struct iw_statistics *, |
407 | char *)) | |
408 | { | |
43cb76d9 | 409 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 410 | const struct iw_statistics *iw; |
1da177e4 | 411 | ssize_t ret = -EINVAL; |
4ec93edb | 412 | |
a160ee69 | 413 | rtnl_lock(); |
6dd214b5 | 414 | if (dev_isalive(dev)) { |
8f1546ca JB |
415 | iw = get_wireless_stats(dev); |
416 | if (iw) | |
6dd214b5 AB |
417 | ret = (*format)(iw, buf); |
418 | } | |
a160ee69 | 419 | rtnl_unlock(); |
1da177e4 LT |
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 | } \ | |
43cb76d9 GKH |
430 | static ssize_t show_iw_##name(struct device *d, \ |
431 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 432 | { \ |
43cb76d9 | 433 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 434 | } \ |
43cb76d9 | 435 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
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[] = { | |
43cb76d9 GKH |
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, | |
1da177e4 LT |
459 | NULL |
460 | }; | |
461 | ||
462 | static struct attribute_group wireless_group = { | |
463 | .name = "wireless", | |
464 | .attrs = wireless_attrs, | |
465 | }; | |
466 | #endif | |
467 | ||
8b41d188 EB |
468 | #endif /* CONFIG_SYSFS */ |
469 | ||
1da177e4 | 470 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 471 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 472 | { |
43cb76d9 | 473 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 474 | int retval; |
1da177e4 | 475 | |
09bb5217 DL |
476 | if (!net_eq(dev_net(dev), &init_net)) |
477 | return 0; | |
478 | ||
312c004d | 479 | /* pass interface to uevent. */ |
7eff2e7a | 480 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
481 | if (retval) |
482 | goto exit; | |
ca2f37db JT |
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. */ | |
7eff2e7a | 487 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 488 | |
bf62456e | 489 | exit: |
bf62456e | 490 | return retval; |
1da177e4 LT |
491 | } |
492 | #endif | |
493 | ||
494 | /* | |
4ec93edb | 495 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 496 | * Called when last reference to device kobject is gone. |
1da177e4 | 497 | */ |
43cb76d9 | 498 | static void netdev_release(struct device *d) |
1da177e4 | 499 | { |
43cb76d9 | 500 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
501 | |
502 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
503 | ||
0b815a1a | 504 | kfree(dev->ifalias); |
1da177e4 LT |
505 | kfree((char *)dev - dev->padded); |
506 | } | |
507 | ||
508 | static struct class net_class = { | |
509 | .name = "net", | |
43cb76d9 | 510 | .dev_release = netdev_release, |
8b41d188 | 511 | #ifdef CONFIG_SYSFS |
43cb76d9 | 512 | .dev_attrs = net_class_attributes, |
8b41d188 | 513 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 514 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 515 | .dev_uevent = netdev_uevent, |
1da177e4 LT |
516 | #endif |
517 | }; | |
518 | ||
9093bbb2 SH |
519 | /* Delete sysfs entries but hold kobject reference until after all |
520 | * netdev references are gone. | |
521 | */ | |
8b41d188 | 522 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 523 | { |
9093bbb2 SH |
524 | struct device *dev = &(net->dev); |
525 | ||
526 | kobject_get(&dev->kobj); | |
3891845e | 527 | |
09ad9bc7 | 528 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
529 | return; |
530 | ||
9093bbb2 | 531 | device_del(dev); |
1da177e4 LT |
532 | } |
533 | ||
534 | /* Create sysfs entries for network device. */ | |
8b41d188 | 535 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 536 | { |
43cb76d9 | 537 | struct device *dev = &(net->dev); |
a4dbd674 | 538 | const struct attribute_group **groups = net->sysfs_groups; |
1da177e4 | 539 | |
43cb76d9 GKH |
540 | dev->class = &net_class; |
541 | dev->platform_data = net; | |
542 | dev->groups = groups; | |
1da177e4 | 543 | |
a2205472 | 544 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 545 | |
8b41d188 | 546 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
547 | /* Allow for a device specific group */ |
548 | if (*groups) | |
549 | groups++; | |
1da177e4 | 550 | |
0c509a6c | 551 | *groups++ = &netstat_group; |
22bb1be4 | 552 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 553 | if (net->ieee80211_ptr) |
fe9925b5 | 554 | *groups++ = &wireless_group; |
3d23e349 JB |
555 | #ifdef CONFIG_WIRELESS_EXT |
556 | else if (net->wireless_handlers) | |
557 | *groups++ = &wireless_group; | |
558 | #endif | |
1da177e4 | 559 | #endif |
8b41d188 | 560 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 561 | |
09ad9bc7 | 562 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
563 | return 0; |
564 | ||
43cb76d9 | 565 | return device_add(dev); |
1da177e4 LT |
566 | } |
567 | ||
b8a9787e JV |
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 | ||
aaf8cdc3 DL |
581 | void netdev_initialize_kobject(struct net_device *net) |
582 | { | |
583 | struct device *device = &(net->dev); | |
584 | device_initialize(device); | |
585 | } | |
586 | ||
8b41d188 | 587 | int netdev_kobject_init(void) |
1da177e4 LT |
588 | { |
589 | return class_register(&net_class); | |
590 | } |