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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> | |
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 | ||
30bde1f5 | 470 | #ifdef CONFIG_RPS |
0a9627f2 TH |
471 | /* |
472 | * RX queue sysfs structures and functions. | |
473 | */ | |
474 | struct rx_queue_attribute { | |
475 | struct attribute attr; | |
476 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
477 | struct rx_queue_attribute *attr, char *buf); | |
478 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
479 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
480 | }; | |
481 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
482 | struct rx_queue_attribute, attr) | |
483 | ||
484 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
485 | ||
486 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
487 | char *buf) | |
488 | { | |
489 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
490 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
491 | ||
492 | if (!attribute->show) | |
493 | return -EIO; | |
494 | ||
495 | return attribute->show(queue, attribute, buf); | |
496 | } | |
497 | ||
498 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
499 | const char *buf, size_t count) | |
500 | { | |
501 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
502 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
503 | ||
504 | if (!attribute->store) | |
505 | return -EIO; | |
506 | ||
507 | return attribute->store(queue, attribute, buf, count); | |
508 | } | |
509 | ||
510 | static struct sysfs_ops rx_queue_sysfs_ops = { | |
511 | .show = rx_queue_attr_show, | |
512 | .store = rx_queue_attr_store, | |
513 | }; | |
514 | ||
515 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
516 | struct rx_queue_attribute *attribute, char *buf) | |
517 | { | |
518 | struct rps_map *map; | |
519 | cpumask_var_t mask; | |
520 | size_t len = 0; | |
521 | int i; | |
522 | ||
523 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
524 | return -ENOMEM; | |
525 | ||
526 | rcu_read_lock(); | |
527 | map = rcu_dereference(queue->rps_map); | |
528 | if (map) | |
529 | for (i = 0; i < map->len; i++) | |
530 | cpumask_set_cpu(map->cpus[i], mask); | |
531 | ||
532 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
533 | if (PAGE_SIZE - len < 3) { | |
534 | rcu_read_unlock(); | |
535 | free_cpumask_var(mask); | |
536 | return -EINVAL; | |
537 | } | |
538 | rcu_read_unlock(); | |
539 | ||
540 | free_cpumask_var(mask); | |
541 | len += sprintf(buf + len, "\n"); | |
542 | return len; | |
543 | } | |
544 | ||
545 | static void rps_map_release(struct rcu_head *rcu) | |
546 | { | |
547 | struct rps_map *map = container_of(rcu, struct rps_map, rcu); | |
548 | ||
549 | kfree(map); | |
550 | } | |
551 | ||
552 | ssize_t store_rps_map(struct netdev_rx_queue *queue, | |
553 | struct rx_queue_attribute *attribute, | |
554 | const char *buf, size_t len) | |
555 | { | |
556 | struct rps_map *old_map, *map; | |
557 | cpumask_var_t mask; | |
558 | int err, cpu, i; | |
559 | static DEFINE_SPINLOCK(rps_map_lock); | |
560 | ||
561 | if (!capable(CAP_NET_ADMIN)) | |
562 | return -EPERM; | |
563 | ||
564 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
565 | return -ENOMEM; | |
566 | ||
567 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
568 | if (err) { | |
569 | free_cpumask_var(mask); | |
570 | return err; | |
571 | } | |
572 | ||
573 | map = kzalloc(max_t(unsigned, | |
574 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
575 | GFP_KERNEL); | |
576 | if (!map) { | |
577 | free_cpumask_var(mask); | |
578 | return -ENOMEM; | |
579 | } | |
580 | ||
581 | i = 0; | |
582 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
583 | map->cpus[i++] = cpu; | |
584 | ||
585 | if (i) | |
586 | map->len = i; | |
587 | else { | |
588 | kfree(map); | |
589 | map = NULL; | |
590 | } | |
591 | ||
592 | spin_lock(&rps_map_lock); | |
593 | old_map = queue->rps_map; | |
594 | rcu_assign_pointer(queue->rps_map, map); | |
595 | spin_unlock(&rps_map_lock); | |
596 | ||
597 | if (old_map) | |
598 | call_rcu(&old_map->rcu, rps_map_release); | |
599 | ||
600 | free_cpumask_var(mask); | |
601 | return len; | |
602 | } | |
603 | ||
604 | static struct rx_queue_attribute rps_cpus_attribute = | |
605 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
606 | ||
607 | static struct attribute *rx_queue_default_attrs[] = { | |
608 | &rps_cpus_attribute.attr, | |
609 | NULL | |
610 | }; | |
611 | ||
612 | static void rx_queue_release(struct kobject *kobj) | |
613 | { | |
614 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
615 | struct rps_map *map = queue->rps_map; | |
616 | struct netdev_rx_queue *first = queue->first; | |
617 | ||
618 | if (map) | |
619 | call_rcu(&map->rcu, rps_map_release); | |
620 | ||
621 | if (atomic_dec_and_test(&first->count)) | |
622 | kfree(first); | |
623 | } | |
624 | ||
625 | static struct kobj_type rx_queue_ktype = { | |
626 | .sysfs_ops = &rx_queue_sysfs_ops, | |
627 | .release = rx_queue_release, | |
628 | .default_attrs = rx_queue_default_attrs, | |
629 | }; | |
630 | ||
631 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
632 | { | |
633 | struct netdev_rx_queue *queue = net->_rx + index; | |
634 | struct kobject *kobj = &queue->kobj; | |
635 | int error = 0; | |
636 | ||
637 | kobj->kset = net->queues_kset; | |
638 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
639 | "rx-%u", index); | |
640 | if (error) { | |
641 | kobject_put(kobj); | |
642 | return error; | |
643 | } | |
644 | ||
645 | kobject_uevent(kobj, KOBJ_ADD); | |
646 | ||
647 | return error; | |
648 | } | |
649 | ||
650 | static int rx_queue_register_kobjects(struct net_device *net) | |
651 | { | |
652 | int i; | |
653 | int error = 0; | |
654 | ||
655 | net->queues_kset = kset_create_and_add("queues", | |
656 | NULL, &net->dev.kobj); | |
657 | if (!net->queues_kset) | |
658 | return -ENOMEM; | |
659 | for (i = 0; i < net->num_rx_queues; i++) { | |
660 | error = rx_queue_add_kobject(net, i); | |
661 | if (error) | |
662 | break; | |
663 | } | |
664 | ||
665 | if (error) | |
666 | while (--i >= 0) | |
667 | kobject_put(&net->_rx[i].kobj); | |
668 | ||
669 | return error; | |
670 | } | |
671 | ||
672 | static void rx_queue_remove_kobjects(struct net_device *net) | |
673 | { | |
674 | int i; | |
675 | ||
676 | for (i = 0; i < net->num_rx_queues; i++) | |
677 | kobject_put(&net->_rx[i].kobj); | |
678 | kset_unregister(net->queues_kset); | |
679 | } | |
30bde1f5 | 680 | #endif /* CONFIG_RPS */ |
8b41d188 EB |
681 | #endif /* CONFIG_SYSFS */ |
682 | ||
1da177e4 | 683 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 684 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 685 | { |
43cb76d9 | 686 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 687 | int retval; |
1da177e4 | 688 | |
09bb5217 DL |
689 | if (!net_eq(dev_net(dev), &init_net)) |
690 | return 0; | |
691 | ||
312c004d | 692 | /* pass interface to uevent. */ |
7eff2e7a | 693 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
694 | if (retval) |
695 | goto exit; | |
ca2f37db JT |
696 | |
697 | /* pass ifindex to uevent. | |
698 | * ifindex is useful as it won't change (interface name may change) | |
699 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 700 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 701 | |
bf62456e | 702 | exit: |
bf62456e | 703 | return retval; |
1da177e4 LT |
704 | } |
705 | #endif | |
706 | ||
707 | /* | |
4ec93edb | 708 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 709 | * Called when last reference to device kobject is gone. |
1da177e4 | 710 | */ |
43cb76d9 | 711 | static void netdev_release(struct device *d) |
1da177e4 | 712 | { |
43cb76d9 | 713 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
714 | |
715 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
716 | ||
0b815a1a | 717 | kfree(dev->ifalias); |
1da177e4 LT |
718 | kfree((char *)dev - dev->padded); |
719 | } | |
720 | ||
721 | static struct class net_class = { | |
722 | .name = "net", | |
43cb76d9 | 723 | .dev_release = netdev_release, |
8b41d188 | 724 | #ifdef CONFIG_SYSFS |
43cb76d9 | 725 | .dev_attrs = net_class_attributes, |
8b41d188 | 726 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 727 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 728 | .dev_uevent = netdev_uevent, |
1da177e4 LT |
729 | #endif |
730 | }; | |
731 | ||
9093bbb2 SH |
732 | /* Delete sysfs entries but hold kobject reference until after all |
733 | * netdev references are gone. | |
734 | */ | |
8b41d188 | 735 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 736 | { |
9093bbb2 SH |
737 | struct device *dev = &(net->dev); |
738 | ||
739 | kobject_get(&dev->kobj); | |
3891845e | 740 | |
09ad9bc7 | 741 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
742 | return; |
743 | ||
30bde1f5 | 744 | #ifdef CONFIG_RPS |
0a9627f2 | 745 | rx_queue_remove_kobjects(net); |
e880eb6c | 746 | #endif |
0a9627f2 | 747 | |
9093bbb2 | 748 | device_del(dev); |
1da177e4 LT |
749 | } |
750 | ||
751 | /* Create sysfs entries for network device. */ | |
8b41d188 | 752 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 753 | { |
43cb76d9 | 754 | struct device *dev = &(net->dev); |
a4dbd674 | 755 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 756 | int error = 0; |
1da177e4 | 757 | |
43cb76d9 GKH |
758 | dev->class = &net_class; |
759 | dev->platform_data = net; | |
760 | dev->groups = groups; | |
1da177e4 | 761 | |
a2205472 | 762 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 763 | |
8b41d188 | 764 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
765 | /* Allow for a device specific group */ |
766 | if (*groups) | |
767 | groups++; | |
1da177e4 | 768 | |
0c509a6c | 769 | *groups++ = &netstat_group; |
22bb1be4 | 770 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 771 | if (net->ieee80211_ptr) |
fe9925b5 | 772 | *groups++ = &wireless_group; |
3d23e349 JB |
773 | #ifdef CONFIG_WIRELESS_EXT |
774 | else if (net->wireless_handlers) | |
775 | *groups++ = &wireless_group; | |
776 | #endif | |
1da177e4 | 777 | #endif |
8b41d188 | 778 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 779 | |
09ad9bc7 | 780 | if (!net_eq(dev_net(net), &init_net)) |
3891845e EB |
781 | return 0; |
782 | ||
0a9627f2 TH |
783 | error = device_add(dev); |
784 | if (error) | |
785 | return error; | |
786 | ||
30bde1f5 | 787 | #ifdef CONFIG_RPS |
0a9627f2 TH |
788 | error = rx_queue_register_kobjects(net); |
789 | if (error) { | |
790 | device_del(dev); | |
791 | return error; | |
792 | } | |
e880eb6c | 793 | #endif |
0a9627f2 TH |
794 | |
795 | return error; | |
1da177e4 LT |
796 | } |
797 | ||
b8a9787e JV |
798 | int netdev_class_create_file(struct class_attribute *class_attr) |
799 | { | |
800 | return class_create_file(&net_class, class_attr); | |
801 | } | |
802 | ||
803 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
804 | { | |
805 | class_remove_file(&net_class, class_attr); | |
806 | } | |
807 | ||
808 | EXPORT_SYMBOL(netdev_class_create_file); | |
809 | EXPORT_SYMBOL(netdev_class_remove_file); | |
810 | ||
aaf8cdc3 DL |
811 | void netdev_initialize_kobject(struct net_device *net) |
812 | { | |
813 | struct device *device = &(net->dev); | |
814 | device_initialize(device); | |
815 | } | |
816 | ||
8b41d188 | 817 | int netdev_kobject_init(void) |
1da177e4 LT |
818 | { |
819 | return class_register(&net_class); | |
820 | } |