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Commit | Line | Data |
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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 | |
b8afe641 EB |
413 | if (!rtnl_trylock()) |
414 | return restart_syscall(); | |
6dd214b5 | 415 | if (dev_isalive(dev)) { |
8f1546ca JB |
416 | iw = get_wireless_stats(dev); |
417 | if (iw) | |
6dd214b5 AB |
418 | ret = (*format)(iw, buf); |
419 | } | |
a160ee69 | 420 | rtnl_unlock(); |
1da177e4 LT |
421 | |
422 | return ret; | |
423 | } | |
424 | ||
425 | /* show function template for wireless fields */ | |
426 | #define WIRELESS_SHOW(name, field, format_string) \ | |
427 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
428 | { \ | |
429 | return sprintf(buf, format_string, iw->field); \ | |
430 | } \ | |
43cb76d9 GKH |
431 | static ssize_t show_iw_##name(struct device *d, \ |
432 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 433 | { \ |
43cb76d9 | 434 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 435 | } \ |
43cb76d9 | 436 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
437 | |
438 | WIRELESS_SHOW(status, status, fmt_hex); | |
439 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
440 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
441 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
442 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
443 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
444 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
445 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
446 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
447 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
448 | ||
449 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
450 | &dev_attr_status.attr, |
451 | &dev_attr_link.attr, | |
452 | &dev_attr_level.attr, | |
453 | &dev_attr_noise.attr, | |
454 | &dev_attr_nwid.attr, | |
455 | &dev_attr_crypt.attr, | |
456 | &dev_attr_fragment.attr, | |
457 | &dev_attr_retries.attr, | |
458 | &dev_attr_misc.attr, | |
459 | &dev_attr_beacon.attr, | |
1da177e4 LT |
460 | NULL |
461 | }; | |
462 | ||
463 | static struct attribute_group wireless_group = { | |
464 | .name = "wireless", | |
465 | .attrs = wireless_attrs, | |
466 | }; | |
467 | #endif | |
468 | ||
0a9627f2 TH |
469 | /* |
470 | * RX queue sysfs structures and functions. | |
471 | */ | |
472 | struct rx_queue_attribute { | |
473 | struct attribute attr; | |
474 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
475 | struct rx_queue_attribute *attr, char *buf); | |
476 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
477 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
478 | }; | |
479 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
480 | struct rx_queue_attribute, attr) | |
481 | ||
482 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
483 | ||
484 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
485 | char *buf) | |
486 | { | |
487 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
488 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
489 | ||
490 | if (!attribute->show) | |
491 | return -EIO; | |
492 | ||
493 | return attribute->show(queue, attribute, buf); | |
494 | } | |
495 | ||
496 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
497 | const char *buf, size_t count) | |
498 | { | |
499 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
500 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
501 | ||
502 | if (!attribute->store) | |
503 | return -EIO; | |
504 | ||
505 | return attribute->store(queue, attribute, buf, count); | |
506 | } | |
507 | ||
508 | static struct sysfs_ops rx_queue_sysfs_ops = { | |
509 | .show = rx_queue_attr_show, | |
510 | .store = rx_queue_attr_store, | |
511 | }; | |
512 | ||
513 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
514 | struct rx_queue_attribute *attribute, char *buf) | |
515 | { | |
516 | struct rps_map *map; | |
517 | cpumask_var_t mask; | |
518 | size_t len = 0; | |
519 | int i; | |
520 | ||
521 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
522 | return -ENOMEM; | |
523 | ||
524 | rcu_read_lock(); | |
525 | map = rcu_dereference(queue->rps_map); | |
526 | if (map) | |
527 | for (i = 0; i < map->len; i++) | |
528 | cpumask_set_cpu(map->cpus[i], mask); | |
529 | ||
530 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
531 | if (PAGE_SIZE - len < 3) { | |
532 | rcu_read_unlock(); | |
533 | free_cpumask_var(mask); | |
534 | return -EINVAL; | |
535 | } | |
536 | rcu_read_unlock(); | |
537 | ||
538 | free_cpumask_var(mask); | |
539 | len += sprintf(buf + len, "\n"); | |
540 | return len; | |
541 | } | |
542 | ||
543 | static void rps_map_release(struct rcu_head *rcu) | |
544 | { | |
545 | struct rps_map *map = container_of(rcu, struct rps_map, rcu); | |
546 | ||
547 | kfree(map); | |
548 | } | |
549 | ||
550 | ssize_t store_rps_map(struct netdev_rx_queue *queue, | |
551 | struct rx_queue_attribute *attribute, | |
552 | const char *buf, size_t len) | |
553 | { | |
554 | struct rps_map *old_map, *map; | |
555 | cpumask_var_t mask; | |
556 | int err, cpu, i; | |
557 | static DEFINE_SPINLOCK(rps_map_lock); | |
558 | ||
559 | if (!capable(CAP_NET_ADMIN)) | |
560 | return -EPERM; | |
561 | ||
562 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
563 | return -ENOMEM; | |
564 | ||
565 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
566 | if (err) { | |
567 | free_cpumask_var(mask); | |
568 | return err; | |
569 | } | |
570 | ||
571 | map = kzalloc(max_t(unsigned, | |
572 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
573 | GFP_KERNEL); | |
574 | if (!map) { | |
575 | free_cpumask_var(mask); | |
576 | return -ENOMEM; | |
577 | } | |
578 | ||
579 | i = 0; | |
580 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
581 | map->cpus[i++] = cpu; | |
582 | ||
583 | if (i) | |
584 | map->len = i; | |
585 | else { | |
586 | kfree(map); | |
587 | map = NULL; | |
588 | } | |
589 | ||
590 | spin_lock(&rps_map_lock); | |
591 | old_map = queue->rps_map; | |
592 | rcu_assign_pointer(queue->rps_map, map); | |
593 | spin_unlock(&rps_map_lock); | |
594 | ||
595 | if (old_map) | |
596 | call_rcu(&old_map->rcu, rps_map_release); | |
597 | ||
598 | free_cpumask_var(mask); | |
599 | return len; | |
600 | } | |
601 | ||
602 | static struct rx_queue_attribute rps_cpus_attribute = | |
603 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
604 | ||
605 | static struct attribute *rx_queue_default_attrs[] = { | |
606 | &rps_cpus_attribute.attr, | |
607 | NULL | |
608 | }; | |
609 | ||
610 | static void rx_queue_release(struct kobject *kobj) | |
611 | { | |
612 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
613 | struct rps_map *map = queue->rps_map; | |
614 | struct netdev_rx_queue *first = queue->first; | |
615 | ||
616 | if (map) | |
617 | call_rcu(&map->rcu, rps_map_release); | |
618 | ||
619 | if (atomic_dec_and_test(&first->count)) | |
620 | kfree(first); | |
621 | } | |
622 | ||
623 | static struct kobj_type rx_queue_ktype = { | |
624 | .sysfs_ops = &rx_queue_sysfs_ops, | |
625 | .release = rx_queue_release, | |
626 | .default_attrs = rx_queue_default_attrs, | |
627 | }; | |
628 | ||
629 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
630 | { | |
631 | struct netdev_rx_queue *queue = net->_rx + index; | |
632 | struct kobject *kobj = &queue->kobj; | |
633 | int error = 0; | |
634 | ||
635 | kobj->kset = net->queues_kset; | |
636 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
637 | "rx-%u", index); | |
638 | if (error) { | |
639 | kobject_put(kobj); | |
640 | return error; | |
641 | } | |
642 | ||
643 | kobject_uevent(kobj, KOBJ_ADD); | |
644 | ||
645 | return error; | |
646 | } | |
647 | ||
648 | static int rx_queue_register_kobjects(struct net_device *net) | |
649 | { | |
650 | int i; | |
651 | int error = 0; | |
652 | ||
653 | net->queues_kset = kset_create_and_add("queues", | |
654 | NULL, &net->dev.kobj); | |
655 | if (!net->queues_kset) | |
656 | return -ENOMEM; | |
657 | for (i = 0; i < net->num_rx_queues; i++) { | |
658 | error = rx_queue_add_kobject(net, i); | |
659 | if (error) | |
660 | break; | |
661 | } | |
662 | ||
663 | if (error) | |
664 | while (--i >= 0) | |
665 | kobject_put(&net->_rx[i].kobj); | |
666 | ||
667 | return error; | |
668 | } | |
669 | ||
670 | static void rx_queue_remove_kobjects(struct net_device *net) | |
671 | { | |
672 | int i; | |
673 | ||
674 | for (i = 0; i < net->num_rx_queues; i++) | |
675 | kobject_put(&net->_rx[i].kobj); | |
676 | kset_unregister(net->queues_kset); | |
677 | } | |
678 | ||
8b41d188 EB |
679 | #endif /* CONFIG_SYSFS */ |
680 | ||
1da177e4 | 681 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 682 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 683 | { |
43cb76d9 | 684 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 685 | int retval; |
1da177e4 | 686 | |
09bb5217 DL |
687 | if (!net_eq(dev_net(dev), &init_net)) |
688 | return 0; | |
689 | ||
312c004d | 690 | /* pass interface to uevent. */ |
7eff2e7a | 691 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
692 | if (retval) |
693 | goto exit; | |
ca2f37db JT |
694 | |
695 | /* pass ifindex to uevent. | |
696 | * ifindex is useful as it won't change (interface name may change) | |
697 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 698 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 699 | |
bf62456e | 700 | exit: |
bf62456e | 701 | return retval; |
1da177e4 LT |
702 | } |
703 | #endif | |
704 | ||
705 | /* | |
4ec93edb | 706 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 707 | * Called when last reference to device kobject is gone. |
1da177e4 | 708 | */ |
43cb76d9 | 709 | static void netdev_release(struct device *d) |
1da177e4 | 710 | { |
43cb76d9 | 711 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
712 | |
713 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
714 | ||
0b815a1a | 715 | kfree(dev->ifalias); |
1da177e4 LT |
716 | kfree((char *)dev - dev->padded); |
717 | } | |
718 | ||
719 | static struct class net_class = { | |
720 | .name = "net", | |
43cb76d9 | 721 | .dev_release = netdev_release, |
8b41d188 | 722 | #ifdef CONFIG_SYSFS |
43cb76d9 | 723 | .dev_attrs = net_class_attributes, |
8b41d188 | 724 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 725 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 726 | .dev_uevent = netdev_uevent, |
1da177e4 LT |
727 | #endif |
728 | }; | |
729 | ||
9093bbb2 SH |
730 | /* Delete sysfs entries but hold kobject reference until after all |
731 | * netdev references are gone. | |
732 | */ | |
8b41d188 | 733 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 734 | { |
9093bbb2 SH |
735 | struct device *dev = &(net->dev); |
736 | ||
737 | kobject_get(&dev->kobj); | |
3891845e | 738 | |
09ad9bc7 | 739 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
740 | return; |
741 | ||
0a9627f2 TH |
742 | rx_queue_remove_kobjects(net); |
743 | ||
9093bbb2 | 744 | device_del(dev); |
1da177e4 LT |
745 | } |
746 | ||
747 | /* Create sysfs entries for network device. */ | |
8b41d188 | 748 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 749 | { |
43cb76d9 | 750 | struct device *dev = &(net->dev); |
a4dbd674 | 751 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 752 | int error = 0; |
1da177e4 | 753 | |
43cb76d9 GKH |
754 | dev->class = &net_class; |
755 | dev->platform_data = net; | |
756 | dev->groups = groups; | |
1da177e4 | 757 | |
a2205472 | 758 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 759 | |
8b41d188 | 760 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
761 | /* Allow for a device specific group */ |
762 | if (*groups) | |
763 | groups++; | |
1da177e4 | 764 | |
0c509a6c | 765 | *groups++ = &netstat_group; |
22bb1be4 | 766 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 767 | if (net->ieee80211_ptr) |
fe9925b5 | 768 | *groups++ = &wireless_group; |
3d23e349 JB |
769 | #ifdef CONFIG_WIRELESS_EXT |
770 | else if (net->wireless_handlers) | |
771 | *groups++ = &wireless_group; | |
772 | #endif | |
1da177e4 | 773 | #endif |
8b41d188 | 774 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 775 | |
09ad9bc7 | 776 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
777 | return 0; |
778 | ||
0a9627f2 TH |
779 | error = device_add(dev); |
780 | if (error) | |
781 | return error; | |
782 | ||
783 | error = rx_queue_register_kobjects(net); | |
784 | if (error) { | |
785 | device_del(dev); | |
786 | return error; | |
787 | } | |
788 | ||
789 | return error; | |
1da177e4 LT |
790 | } |
791 | ||
b8a9787e JV |
792 | int netdev_class_create_file(struct class_attribute *class_attr) |
793 | { | |
794 | return class_create_file(&net_class, class_attr); | |
795 | } | |
796 | ||
797 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
798 | { | |
799 | class_remove_file(&net_class, class_attr); | |
800 | } | |
801 | ||
802 | EXPORT_SYMBOL(netdev_class_create_file); | |
803 | EXPORT_SYMBOL(netdev_class_remove_file); | |
804 | ||
aaf8cdc3 DL |
805 | void netdev_initialize_kobject(struct net_device *net) |
806 | { | |
807 | struct device *device = &(net->dev); | |
808 | device_initialize(device); | |
809 | } | |
810 | ||
8b41d188 | 811 | int netdev_kobject_init(void) |
1da177e4 LT |
812 | { |
813 | return class_register(&net_class); | |
814 | } |