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> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
1da177e4 LT |
17 | #include <net/sock.h> |
18 | #include <linux/rtnetlink.h> | |
19 | #include <linux/wireless.h> | |
8f1546ca | 20 | #include <net/wext.h> |
1da177e4 | 21 | |
342709ef PE |
22 | #include "net-sysfs.h" |
23 | ||
8b41d188 | 24 | #ifdef CONFIG_SYSFS |
1da177e4 | 25 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 26 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 LT |
27 | static const char fmt_dec[] = "%d\n"; |
28 | static const char fmt_ulong[] = "%lu\n"; | |
29 | ||
4ec93edb | 30 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 31 | { |
fe9925b5 | 32 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
33 | } |
34 | ||
35 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
36 | static ssize_t netdev_show(const struct device *dev, |
37 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
38 | ssize_t (*format)(const struct net_device *, char *)) |
39 | { | |
43cb76d9 | 40 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
41 | ssize_t ret = -EINVAL; |
42 | ||
43 | read_lock(&dev_base_lock); | |
44 | if (dev_isalive(net)) | |
45 | ret = (*format)(net, buf); | |
46 | read_unlock(&dev_base_lock); | |
47 | ||
48 | return ret; | |
49 | } | |
50 | ||
51 | /* generate a show function for simple field */ | |
52 | #define NETDEVICE_SHOW(field, format_string) \ | |
53 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
54 | { \ | |
55 | return sprintf(buf, format_string, net->field); \ | |
56 | } \ | |
43cb76d9 GKH |
57 | static ssize_t show_##field(struct device *dev, \ |
58 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 59 | { \ |
43cb76d9 | 60 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
61 | } |
62 | ||
63 | ||
64 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 65 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
66 | const char *buf, size_t len, |
67 | int (*set)(struct net_device *, unsigned long)) | |
68 | { | |
69 | struct net_device *net = to_net_dev(dev); | |
70 | char *endp; | |
71 | unsigned long new; | |
72 | int ret = -EINVAL; | |
73 | ||
74 | if (!capable(CAP_NET_ADMIN)) | |
75 | return -EPERM; | |
76 | ||
77 | new = simple_strtoul(buf, &endp, 0); | |
78 | if (endp == buf) | |
79 | goto err; | |
80 | ||
5a5990d3 | 81 | if (!rtnl_trylock()) |
336ca57c | 82 | return restart_syscall(); |
5a5990d3 | 83 | |
1da177e4 LT |
84 | if (dev_isalive(net)) { |
85 | if ((ret = (*set)(net, new)) == 0) | |
86 | ret = len; | |
87 | } | |
88 | rtnl_unlock(); | |
89 | err: | |
90 | return ret; | |
91 | } | |
92 | ||
9d29672c | 93 | NETDEVICE_SHOW(dev_id, fmt_hex); |
fd586bac KS |
94 | NETDEVICE_SHOW(addr_len, fmt_dec); |
95 | NETDEVICE_SHOW(iflink, fmt_dec); | |
96 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
97 | NETDEVICE_SHOW(features, fmt_long_hex); | |
98 | NETDEVICE_SHOW(type, fmt_dec); | |
b00055aa | 99 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
100 | |
101 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
102 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
103 | char *buf) | |
1da177e4 LT |
104 | { |
105 | struct net_device *net = to_net_dev(dev); | |
106 | ssize_t ret = -EINVAL; | |
107 | ||
108 | read_lock(&dev_base_lock); | |
109 | if (dev_isalive(net)) | |
7ffc49a6 | 110 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
111 | read_unlock(&dev_base_lock); |
112 | return ret; | |
113 | } | |
114 | ||
43cb76d9 GKH |
115 | static ssize_t show_broadcast(struct device *dev, |
116 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
117 | { |
118 | struct net_device *net = to_net_dev(dev); | |
119 | if (dev_isalive(net)) | |
7ffc49a6 | 120 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
121 | return -EINVAL; |
122 | } | |
123 | ||
43cb76d9 GKH |
124 | static ssize_t show_carrier(struct device *dev, |
125 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
126 | { |
127 | struct net_device *netdev = to_net_dev(dev); | |
128 | if (netif_running(netdev)) { | |
129 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
130 | } | |
131 | return -EINVAL; | |
132 | } | |
133 | ||
d519e17e AG |
134 | static ssize_t show_speed(struct device *dev, |
135 | struct device_attribute *attr, char *buf) | |
136 | { | |
137 | struct net_device *netdev = to_net_dev(dev); | |
138 | int ret = -EINVAL; | |
139 | ||
140 | if (!rtnl_trylock()) | |
141 | return restart_syscall(); | |
142 | ||
ac5e3af9 ED |
143 | if (netif_running(netdev) && |
144 | netdev->ethtool_ops && | |
145 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
146 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; |
147 | ||
148 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
149 | ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd)); | |
150 | } | |
151 | rtnl_unlock(); | |
152 | return ret; | |
153 | } | |
154 | ||
155 | static ssize_t show_duplex(struct device *dev, | |
156 | struct device_attribute *attr, char *buf) | |
157 | { | |
158 | struct net_device *netdev = to_net_dev(dev); | |
159 | int ret = -EINVAL; | |
160 | ||
161 | if (!rtnl_trylock()) | |
162 | return restart_syscall(); | |
163 | ||
ac5e3af9 ED |
164 | if (netif_running(netdev) && |
165 | netdev->ethtool_ops && | |
166 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
167 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; |
168 | ||
169 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
170 | ret = sprintf(buf, "%s\n", cmd.duplex ? "full" : "half"); | |
171 | } | |
172 | rtnl_unlock(); | |
173 | return ret; | |
174 | } | |
175 | ||
43cb76d9 GKH |
176 | static ssize_t show_dormant(struct device *dev, |
177 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
178 | { |
179 | struct net_device *netdev = to_net_dev(dev); | |
180 | ||
181 | if (netif_running(netdev)) | |
182 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
183 | ||
184 | return -EINVAL; | |
185 | } | |
186 | ||
36cbd3dc | 187 | static const char *const operstates[] = { |
b00055aa SR |
188 | "unknown", |
189 | "notpresent", /* currently unused */ | |
190 | "down", | |
191 | "lowerlayerdown", | |
192 | "testing", /* currently unused */ | |
193 | "dormant", | |
194 | "up" | |
195 | }; | |
196 | ||
43cb76d9 GKH |
197 | static ssize_t show_operstate(struct device *dev, |
198 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
199 | { |
200 | const struct net_device *netdev = to_net_dev(dev); | |
201 | unsigned char operstate; | |
202 | ||
203 | read_lock(&dev_base_lock); | |
204 | operstate = netdev->operstate; | |
205 | if (!netif_running(netdev)) | |
206 | operstate = IF_OPER_DOWN; | |
207 | read_unlock(&dev_base_lock); | |
208 | ||
e3a5cd9e | 209 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
210 | return -EINVAL; /* should not happen */ |
211 | ||
212 | return sprintf(buf, "%s\n", operstates[operstate]); | |
213 | } | |
214 | ||
1da177e4 LT |
215 | /* read-write attributes */ |
216 | NETDEVICE_SHOW(mtu, fmt_dec); | |
217 | ||
218 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
219 | { | |
220 | return dev_set_mtu(net, (int) new_mtu); | |
221 | } | |
222 | ||
43cb76d9 GKH |
223 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
224 | const char *buf, size_t len) | |
1da177e4 | 225 | { |
43cb76d9 | 226 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
227 | } |
228 | ||
1da177e4 LT |
229 | NETDEVICE_SHOW(flags, fmt_hex); |
230 | ||
231 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
232 | { | |
233 | return dev_change_flags(net, (unsigned) new_flags); | |
234 | } | |
235 | ||
43cb76d9 GKH |
236 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
237 | const char *buf, size_t len) | |
1da177e4 | 238 | { |
43cb76d9 | 239 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
240 | } |
241 | ||
1da177e4 LT |
242 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
243 | ||
244 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
245 | { | |
246 | net->tx_queue_len = new_len; | |
247 | return 0; | |
248 | } | |
249 | ||
43cb76d9 GKH |
250 | static ssize_t store_tx_queue_len(struct device *dev, |
251 | struct device_attribute *attr, | |
252 | const char *buf, size_t len) | |
1da177e4 | 253 | { |
43cb76d9 | 254 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
255 | } |
256 | ||
0b815a1a SH |
257 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
258 | const char *buf, size_t len) | |
259 | { | |
260 | struct net_device *netdev = to_net_dev(dev); | |
261 | size_t count = len; | |
262 | ssize_t ret; | |
263 | ||
264 | if (!capable(CAP_NET_ADMIN)) | |
265 | return -EPERM; | |
266 | ||
267 | /* ignore trailing newline */ | |
268 | if (len > 0 && buf[len - 1] == '\n') | |
269 | --count; | |
270 | ||
336ca57c EB |
271 | if (!rtnl_trylock()) |
272 | return restart_syscall(); | |
0b815a1a SH |
273 | ret = dev_set_alias(netdev, buf, count); |
274 | rtnl_unlock(); | |
275 | ||
276 | return ret < 0 ? ret : len; | |
277 | } | |
278 | ||
279 | static ssize_t show_ifalias(struct device *dev, | |
280 | struct device_attribute *attr, char *buf) | |
281 | { | |
282 | const struct net_device *netdev = to_net_dev(dev); | |
283 | ssize_t ret = 0; | |
284 | ||
336ca57c EB |
285 | if (!rtnl_trylock()) |
286 | return restart_syscall(); | |
0b815a1a SH |
287 | if (netdev->ifalias) |
288 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
289 | rtnl_unlock(); | |
290 | return ret; | |
291 | } | |
292 | ||
43cb76d9 | 293 | static struct device_attribute net_class_attributes[] = { |
fd586bac | 294 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 295 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 296 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
297 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
298 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
299 | __ATTR(features, S_IRUGO, show_features, NULL), | |
300 | __ATTR(type, S_IRUGO, show_type, NULL), | |
b00055aa | 301 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
302 | __ATTR(address, S_IRUGO, show_address, NULL), |
303 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
304 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
305 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
306 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
307 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
308 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
309 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
310 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
311 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
312 | store_tx_queue_len), | |
fd586bac | 313 | {} |
1da177e4 LT |
314 | }; |
315 | ||
316 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
317 | static ssize_t netstat_show(const struct device *d, |
318 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
319 | unsigned long offset) |
320 | { | |
43cb76d9 | 321 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
322 | ssize_t ret = -EINVAL; |
323 | ||
df1b86c5 PE |
324 | WARN_ON(offset > sizeof(struct net_device_stats) || |
325 | offset % sizeof(unsigned long) != 0); | |
1da177e4 LT |
326 | |
327 | read_lock(&dev_base_lock); | |
96e74088 | 328 | if (dev_isalive(dev)) { |
eeda3fd6 | 329 | const struct net_device_stats *stats = dev_get_stats(dev); |
1da177e4 LT |
330 | ret = sprintf(buf, fmt_ulong, |
331 | *(unsigned long *)(((u8 *) stats) + offset)); | |
96e74088 | 332 | } |
1da177e4 LT |
333 | read_unlock(&dev_base_lock); |
334 | return ret; | |
335 | } | |
336 | ||
337 | /* generate a read-only statistics attribute */ | |
338 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
339 | static ssize_t show_##name(struct device *d, \ |
340 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 341 | { \ |
43cb76d9 | 342 | return netstat_show(d, attr, buf, \ |
1da177e4 LT |
343 | offsetof(struct net_device_stats, name)); \ |
344 | } \ | |
43cb76d9 | 345 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
346 | |
347 | NETSTAT_ENTRY(rx_packets); | |
348 | NETSTAT_ENTRY(tx_packets); | |
349 | NETSTAT_ENTRY(rx_bytes); | |
350 | NETSTAT_ENTRY(tx_bytes); | |
351 | NETSTAT_ENTRY(rx_errors); | |
352 | NETSTAT_ENTRY(tx_errors); | |
353 | NETSTAT_ENTRY(rx_dropped); | |
354 | NETSTAT_ENTRY(tx_dropped); | |
355 | NETSTAT_ENTRY(multicast); | |
356 | NETSTAT_ENTRY(collisions); | |
357 | NETSTAT_ENTRY(rx_length_errors); | |
358 | NETSTAT_ENTRY(rx_over_errors); | |
359 | NETSTAT_ENTRY(rx_crc_errors); | |
360 | NETSTAT_ENTRY(rx_frame_errors); | |
361 | NETSTAT_ENTRY(rx_fifo_errors); | |
362 | NETSTAT_ENTRY(rx_missed_errors); | |
363 | NETSTAT_ENTRY(tx_aborted_errors); | |
364 | NETSTAT_ENTRY(tx_carrier_errors); | |
365 | NETSTAT_ENTRY(tx_fifo_errors); | |
366 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
367 | NETSTAT_ENTRY(tx_window_errors); | |
368 | NETSTAT_ENTRY(rx_compressed); | |
369 | NETSTAT_ENTRY(tx_compressed); | |
370 | ||
371 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
372 | &dev_attr_rx_packets.attr, |
373 | &dev_attr_tx_packets.attr, | |
374 | &dev_attr_rx_bytes.attr, | |
375 | &dev_attr_tx_bytes.attr, | |
376 | &dev_attr_rx_errors.attr, | |
377 | &dev_attr_tx_errors.attr, | |
378 | &dev_attr_rx_dropped.attr, | |
379 | &dev_attr_tx_dropped.attr, | |
380 | &dev_attr_multicast.attr, | |
381 | &dev_attr_collisions.attr, | |
382 | &dev_attr_rx_length_errors.attr, | |
383 | &dev_attr_rx_over_errors.attr, | |
384 | &dev_attr_rx_crc_errors.attr, | |
385 | &dev_attr_rx_frame_errors.attr, | |
386 | &dev_attr_rx_fifo_errors.attr, | |
387 | &dev_attr_rx_missed_errors.attr, | |
388 | &dev_attr_tx_aborted_errors.attr, | |
389 | &dev_attr_tx_carrier_errors.attr, | |
390 | &dev_attr_tx_fifo_errors.attr, | |
391 | &dev_attr_tx_heartbeat_errors.attr, | |
392 | &dev_attr_tx_window_errors.attr, | |
393 | &dev_attr_rx_compressed.attr, | |
394 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
395 | NULL |
396 | }; | |
397 | ||
398 | ||
399 | static struct attribute_group netstat_group = { | |
400 | .name = "statistics", | |
401 | .attrs = netstat_attrs, | |
402 | }; | |
403 | ||
22bb1be4 | 404 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 405 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 406 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
407 | ssize_t (*format)(const struct iw_statistics *, |
408 | char *)) | |
409 | { | |
43cb76d9 | 410 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 411 | const struct iw_statistics *iw; |
1da177e4 | 412 | ssize_t ret = -EINVAL; |
4ec93edb | 413 | |
b8afe641 EB |
414 | if (!rtnl_trylock()) |
415 | return restart_syscall(); | |
6dd214b5 | 416 | if (dev_isalive(dev)) { |
8f1546ca JB |
417 | iw = get_wireless_stats(dev); |
418 | if (iw) | |
6dd214b5 AB |
419 | ret = (*format)(iw, buf); |
420 | } | |
a160ee69 | 421 | rtnl_unlock(); |
1da177e4 LT |
422 | |
423 | return ret; | |
424 | } | |
425 | ||
426 | /* show function template for wireless fields */ | |
427 | #define WIRELESS_SHOW(name, field, format_string) \ | |
428 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
429 | { \ | |
430 | return sprintf(buf, format_string, iw->field); \ | |
431 | } \ | |
43cb76d9 GKH |
432 | static ssize_t show_iw_##name(struct device *d, \ |
433 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 434 | { \ |
43cb76d9 | 435 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 436 | } \ |
43cb76d9 | 437 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
438 | |
439 | WIRELESS_SHOW(status, status, fmt_hex); | |
440 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
441 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
442 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
443 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
444 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
445 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
446 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
447 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
448 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
449 | ||
450 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
451 | &dev_attr_status.attr, |
452 | &dev_attr_link.attr, | |
453 | &dev_attr_level.attr, | |
454 | &dev_attr_noise.attr, | |
455 | &dev_attr_nwid.attr, | |
456 | &dev_attr_crypt.attr, | |
457 | &dev_attr_fragment.attr, | |
458 | &dev_attr_retries.attr, | |
459 | &dev_attr_misc.attr, | |
460 | &dev_attr_beacon.attr, | |
1da177e4 LT |
461 | NULL |
462 | }; | |
463 | ||
464 | static struct attribute_group wireless_group = { | |
465 | .name = "wireless", | |
466 | .attrs = wireless_attrs, | |
467 | }; | |
468 | #endif | |
469 | ||
8b41d188 EB |
470 | #endif /* CONFIG_SYSFS */ |
471 | ||
1da177e4 | 472 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 473 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 474 | { |
43cb76d9 | 475 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 476 | int retval; |
1da177e4 | 477 | |
09bb5217 DL |
478 | if (!net_eq(dev_net(dev), &init_net)) |
479 | return 0; | |
480 | ||
312c004d | 481 | /* pass interface to uevent. */ |
7eff2e7a | 482 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
483 | if (retval) |
484 | goto exit; | |
ca2f37db JT |
485 | |
486 | /* pass ifindex to uevent. | |
487 | * ifindex is useful as it won't change (interface name may change) | |
488 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 489 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 490 | |
bf62456e | 491 | exit: |
bf62456e | 492 | return retval; |
1da177e4 LT |
493 | } |
494 | #endif | |
495 | ||
496 | /* | |
4ec93edb | 497 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 498 | * Called when last reference to device kobject is gone. |
1da177e4 | 499 | */ |
43cb76d9 | 500 | static void netdev_release(struct device *d) |
1da177e4 | 501 | { |
43cb76d9 | 502 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
503 | |
504 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
505 | ||
0b815a1a | 506 | kfree(dev->ifalias); |
1da177e4 LT |
507 | kfree((char *)dev - dev->padded); |
508 | } | |
509 | ||
510 | static struct class net_class = { | |
511 | .name = "net", | |
43cb76d9 | 512 | .dev_release = netdev_release, |
8b41d188 | 513 | #ifdef CONFIG_SYSFS |
43cb76d9 | 514 | .dev_attrs = net_class_attributes, |
8b41d188 | 515 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 516 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 517 | .dev_uevent = netdev_uevent, |
1da177e4 LT |
518 | #endif |
519 | }; | |
520 | ||
9093bbb2 SH |
521 | /* Delete sysfs entries but hold kobject reference until after all |
522 | * netdev references are gone. | |
523 | */ | |
8b41d188 | 524 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 525 | { |
9093bbb2 SH |
526 | struct device *dev = &(net->dev); |
527 | ||
528 | kobject_get(&dev->kobj); | |
3891845e | 529 | |
09ad9bc7 | 530 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
531 | return; |
532 | ||
9093bbb2 | 533 | device_del(dev); |
1da177e4 LT |
534 | } |
535 | ||
536 | /* Create sysfs entries for network device. */ | |
8b41d188 | 537 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 538 | { |
43cb76d9 | 539 | struct device *dev = &(net->dev); |
a4dbd674 | 540 | const struct attribute_group **groups = net->sysfs_groups; |
1da177e4 | 541 | |
43cb76d9 GKH |
542 | dev->class = &net_class; |
543 | dev->platform_data = net; | |
544 | dev->groups = groups; | |
1da177e4 | 545 | |
a2205472 | 546 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 547 | |
8b41d188 | 548 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
549 | /* Allow for a device specific group */ |
550 | if (*groups) | |
551 | groups++; | |
1da177e4 | 552 | |
0c509a6c | 553 | *groups++ = &netstat_group; |
22bb1be4 | 554 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 555 | if (net->ieee80211_ptr) |
fe9925b5 | 556 | *groups++ = &wireless_group; |
3d23e349 JB |
557 | #ifdef CONFIG_WIRELESS_EXT |
558 | else if (net->wireless_handlers) | |
559 | *groups++ = &wireless_group; | |
560 | #endif | |
1da177e4 | 561 | #endif |
8b41d188 | 562 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 563 | |
09ad9bc7 | 564 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
565 | return 0; |
566 | ||
43cb76d9 | 567 | return device_add(dev); |
1da177e4 LT |
568 | } |
569 | ||
b8a9787e JV |
570 | int netdev_class_create_file(struct class_attribute *class_attr) |
571 | { | |
572 | return class_create_file(&net_class, class_attr); | |
573 | } | |
574 | ||
575 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
576 | { | |
577 | class_remove_file(&net_class, class_attr); | |
578 | } | |
579 | ||
580 | EXPORT_SYMBOL(netdev_class_create_file); | |
581 | EXPORT_SYMBOL(netdev_class_remove_file); | |
582 | ||
aaf8cdc3 DL |
583 | void netdev_initialize_kobject(struct net_device *net) |
584 | { | |
585 | struct device *device = &(net->dev); | |
586 | device_initialize(device); | |
587 | } | |
588 | ||
8b41d188 | 589 | int netdev_kobject_init(void) |
1da177e4 LT |
590 | { |
591 | return class_register(&net_class); | |
592 | } |