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> |
608b4b95 | 17 | #include <linux/nsproxy.h> |
1da177e4 | 18 | #include <net/sock.h> |
608b4b95 | 19 | #include <net/net_namespace.h> |
1da177e4 LT |
20 | #include <linux/rtnetlink.h> |
21 | #include <linux/wireless.h> | |
fec5e652 | 22 | #include <linux/vmalloc.h> |
8f1546ca | 23 | #include <net/wext.h> |
1da177e4 | 24 | |
342709ef PE |
25 | #include "net-sysfs.h" |
26 | ||
8b41d188 | 27 | #ifdef CONFIG_SYSFS |
1da177e4 | 28 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 29 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 LT |
30 | static const char fmt_dec[] = "%d\n"; |
31 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 32 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 33 | |
4ec93edb | 34 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 35 | { |
fe9925b5 | 36 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
37 | } |
38 | ||
39 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
40 | static ssize_t netdev_show(const struct device *dev, |
41 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
42 | ssize_t (*format)(const struct net_device *, char *)) |
43 | { | |
43cb76d9 | 44 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
45 | ssize_t ret = -EINVAL; |
46 | ||
47 | read_lock(&dev_base_lock); | |
48 | if (dev_isalive(net)) | |
49 | ret = (*format)(net, buf); | |
50 | read_unlock(&dev_base_lock); | |
51 | ||
52 | return ret; | |
53 | } | |
54 | ||
55 | /* generate a show function for simple field */ | |
56 | #define NETDEVICE_SHOW(field, format_string) \ | |
57 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
58 | { \ | |
59 | return sprintf(buf, format_string, net->field); \ | |
60 | } \ | |
43cb76d9 GKH |
61 | static ssize_t show_##field(struct device *dev, \ |
62 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 63 | { \ |
43cb76d9 | 64 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
65 | } |
66 | ||
67 | ||
68 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 69 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
70 | const char *buf, size_t len, |
71 | int (*set)(struct net_device *, unsigned long)) | |
72 | { | |
73 | struct net_device *net = to_net_dev(dev); | |
74 | char *endp; | |
75 | unsigned long new; | |
76 | int ret = -EINVAL; | |
77 | ||
78 | if (!capable(CAP_NET_ADMIN)) | |
79 | return -EPERM; | |
80 | ||
81 | new = simple_strtoul(buf, &endp, 0); | |
82 | if (endp == buf) | |
83 | goto err; | |
84 | ||
5a5990d3 | 85 | if (!rtnl_trylock()) |
336ca57c | 86 | return restart_syscall(); |
5a5990d3 | 87 | |
1da177e4 LT |
88 | if (dev_isalive(net)) { |
89 | if ((ret = (*set)(net, new)) == 0) | |
90 | ret = len; | |
91 | } | |
92 | rtnl_unlock(); | |
93 | err: | |
94 | return ret; | |
95 | } | |
96 | ||
9d29672c | 97 | NETDEVICE_SHOW(dev_id, fmt_hex); |
c1f79426 | 98 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
fd586bac KS |
99 | NETDEVICE_SHOW(addr_len, fmt_dec); |
100 | NETDEVICE_SHOW(iflink, fmt_dec); | |
101 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
102 | NETDEVICE_SHOW(features, fmt_long_hex); | |
103 | NETDEVICE_SHOW(type, fmt_dec); | |
b00055aa | 104 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
105 | |
106 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
107 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
108 | char *buf) | |
1da177e4 LT |
109 | { |
110 | struct net_device *net = to_net_dev(dev); | |
111 | ssize_t ret = -EINVAL; | |
112 | ||
113 | read_lock(&dev_base_lock); | |
114 | if (dev_isalive(net)) | |
7ffc49a6 | 115 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
116 | read_unlock(&dev_base_lock); |
117 | return ret; | |
118 | } | |
119 | ||
43cb76d9 GKH |
120 | static ssize_t show_broadcast(struct device *dev, |
121 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
122 | { |
123 | struct net_device *net = to_net_dev(dev); | |
124 | if (dev_isalive(net)) | |
7ffc49a6 | 125 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
126 | return -EINVAL; |
127 | } | |
128 | ||
43cb76d9 GKH |
129 | static ssize_t show_carrier(struct device *dev, |
130 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
131 | { |
132 | struct net_device *netdev = to_net_dev(dev); | |
133 | if (netif_running(netdev)) { | |
134 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
135 | } | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
d519e17e AG |
139 | static ssize_t show_speed(struct device *dev, |
140 | struct device_attribute *attr, char *buf) | |
141 | { | |
142 | struct net_device *netdev = to_net_dev(dev); | |
143 | int ret = -EINVAL; | |
144 | ||
145 | if (!rtnl_trylock()) | |
146 | return restart_syscall(); | |
147 | ||
ac5e3af9 ED |
148 | if (netif_running(netdev) && |
149 | netdev->ethtool_ops && | |
150 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
151 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; |
152 | ||
153 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
154 | ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd)); | |
155 | } | |
156 | rtnl_unlock(); | |
157 | return ret; | |
158 | } | |
159 | ||
160 | static ssize_t show_duplex(struct device *dev, | |
161 | struct device_attribute *attr, char *buf) | |
162 | { | |
163 | struct net_device *netdev = to_net_dev(dev); | |
164 | int ret = -EINVAL; | |
165 | ||
166 | if (!rtnl_trylock()) | |
167 | return restart_syscall(); | |
168 | ||
ac5e3af9 ED |
169 | if (netif_running(netdev) && |
170 | netdev->ethtool_ops && | |
171 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
172 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; |
173 | ||
174 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
175 | ret = sprintf(buf, "%s\n", cmd.duplex ? "full" : "half"); | |
176 | } | |
177 | rtnl_unlock(); | |
178 | return ret; | |
179 | } | |
180 | ||
43cb76d9 GKH |
181 | static ssize_t show_dormant(struct device *dev, |
182 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
183 | { |
184 | struct net_device *netdev = to_net_dev(dev); | |
185 | ||
186 | if (netif_running(netdev)) | |
187 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
188 | ||
189 | return -EINVAL; | |
190 | } | |
191 | ||
36cbd3dc | 192 | static const char *const operstates[] = { |
b00055aa SR |
193 | "unknown", |
194 | "notpresent", /* currently unused */ | |
195 | "down", | |
196 | "lowerlayerdown", | |
197 | "testing", /* currently unused */ | |
198 | "dormant", | |
199 | "up" | |
200 | }; | |
201 | ||
43cb76d9 GKH |
202 | static ssize_t show_operstate(struct device *dev, |
203 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
204 | { |
205 | const struct net_device *netdev = to_net_dev(dev); | |
206 | unsigned char operstate; | |
207 | ||
208 | read_lock(&dev_base_lock); | |
209 | operstate = netdev->operstate; | |
210 | if (!netif_running(netdev)) | |
211 | operstate = IF_OPER_DOWN; | |
212 | read_unlock(&dev_base_lock); | |
213 | ||
e3a5cd9e | 214 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
215 | return -EINVAL; /* should not happen */ |
216 | ||
217 | return sprintf(buf, "%s\n", operstates[operstate]); | |
218 | } | |
219 | ||
1da177e4 LT |
220 | /* read-write attributes */ |
221 | NETDEVICE_SHOW(mtu, fmt_dec); | |
222 | ||
223 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
224 | { | |
225 | return dev_set_mtu(net, (int) new_mtu); | |
226 | } | |
227 | ||
43cb76d9 GKH |
228 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
229 | const char *buf, size_t len) | |
1da177e4 | 230 | { |
43cb76d9 | 231 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
232 | } |
233 | ||
1da177e4 LT |
234 | NETDEVICE_SHOW(flags, fmt_hex); |
235 | ||
236 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
237 | { | |
238 | return dev_change_flags(net, (unsigned) new_flags); | |
239 | } | |
240 | ||
43cb76d9 GKH |
241 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
242 | const char *buf, size_t len) | |
1da177e4 | 243 | { |
43cb76d9 | 244 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
245 | } |
246 | ||
1da177e4 LT |
247 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
248 | ||
249 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
250 | { | |
251 | net->tx_queue_len = new_len; | |
252 | return 0; | |
253 | } | |
254 | ||
43cb76d9 GKH |
255 | static ssize_t store_tx_queue_len(struct device *dev, |
256 | struct device_attribute *attr, | |
257 | const char *buf, size_t len) | |
1da177e4 | 258 | { |
43cb76d9 | 259 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
260 | } |
261 | ||
0b815a1a SH |
262 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
263 | const char *buf, size_t len) | |
264 | { | |
265 | struct net_device *netdev = to_net_dev(dev); | |
266 | size_t count = len; | |
267 | ssize_t ret; | |
268 | ||
269 | if (!capable(CAP_NET_ADMIN)) | |
270 | return -EPERM; | |
271 | ||
272 | /* ignore trailing newline */ | |
273 | if (len > 0 && buf[len - 1] == '\n') | |
274 | --count; | |
275 | ||
336ca57c EB |
276 | if (!rtnl_trylock()) |
277 | return restart_syscall(); | |
0b815a1a SH |
278 | ret = dev_set_alias(netdev, buf, count); |
279 | rtnl_unlock(); | |
280 | ||
281 | return ret < 0 ? ret : len; | |
282 | } | |
283 | ||
284 | static ssize_t show_ifalias(struct device *dev, | |
285 | struct device_attribute *attr, char *buf) | |
286 | { | |
287 | const struct net_device *netdev = to_net_dev(dev); | |
288 | ssize_t ret = 0; | |
289 | ||
336ca57c EB |
290 | if (!rtnl_trylock()) |
291 | return restart_syscall(); | |
0b815a1a SH |
292 | if (netdev->ifalias) |
293 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
294 | rtnl_unlock(); | |
295 | return ret; | |
296 | } | |
297 | ||
43cb76d9 | 298 | static struct device_attribute net_class_attributes[] = { |
c1f79426 | 299 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
fd586bac | 300 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 301 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 302 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
303 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
304 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
305 | __ATTR(features, S_IRUGO, show_features, NULL), | |
306 | __ATTR(type, S_IRUGO, show_type, NULL), | |
b00055aa | 307 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
308 | __ATTR(address, S_IRUGO, show_address, NULL), |
309 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
310 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
311 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
312 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
313 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
314 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
315 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
316 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
317 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
318 | store_tx_queue_len), | |
fd586bac | 319 | {} |
1da177e4 LT |
320 | }; |
321 | ||
322 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
323 | static ssize_t netstat_show(const struct device *d, |
324 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
325 | unsigned long offset) |
326 | { | |
43cb76d9 | 327 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
328 | ssize_t ret = -EINVAL; |
329 | ||
be1f3c2c BH |
330 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
331 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
332 | |
333 | read_lock(&dev_base_lock); | |
96e74088 | 334 | if (dev_isalive(dev)) { |
28172739 ED |
335 | struct rtnl_link_stats64 temp; |
336 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
337 | ||
be1f3c2c | 338 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 339 | } |
1da177e4 LT |
340 | read_unlock(&dev_base_lock); |
341 | return ret; | |
342 | } | |
343 | ||
344 | /* generate a read-only statistics attribute */ | |
345 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
346 | static ssize_t show_##name(struct device *d, \ |
347 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 348 | { \ |
43cb76d9 | 349 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 350 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 351 | } \ |
43cb76d9 | 352 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
353 | |
354 | NETSTAT_ENTRY(rx_packets); | |
355 | NETSTAT_ENTRY(tx_packets); | |
356 | NETSTAT_ENTRY(rx_bytes); | |
357 | NETSTAT_ENTRY(tx_bytes); | |
358 | NETSTAT_ENTRY(rx_errors); | |
359 | NETSTAT_ENTRY(tx_errors); | |
360 | NETSTAT_ENTRY(rx_dropped); | |
361 | NETSTAT_ENTRY(tx_dropped); | |
362 | NETSTAT_ENTRY(multicast); | |
363 | NETSTAT_ENTRY(collisions); | |
364 | NETSTAT_ENTRY(rx_length_errors); | |
365 | NETSTAT_ENTRY(rx_over_errors); | |
366 | NETSTAT_ENTRY(rx_crc_errors); | |
367 | NETSTAT_ENTRY(rx_frame_errors); | |
368 | NETSTAT_ENTRY(rx_fifo_errors); | |
369 | NETSTAT_ENTRY(rx_missed_errors); | |
370 | NETSTAT_ENTRY(tx_aborted_errors); | |
371 | NETSTAT_ENTRY(tx_carrier_errors); | |
372 | NETSTAT_ENTRY(tx_fifo_errors); | |
373 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
374 | NETSTAT_ENTRY(tx_window_errors); | |
375 | NETSTAT_ENTRY(rx_compressed); | |
376 | NETSTAT_ENTRY(tx_compressed); | |
377 | ||
378 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
379 | &dev_attr_rx_packets.attr, |
380 | &dev_attr_tx_packets.attr, | |
381 | &dev_attr_rx_bytes.attr, | |
382 | &dev_attr_tx_bytes.attr, | |
383 | &dev_attr_rx_errors.attr, | |
384 | &dev_attr_tx_errors.attr, | |
385 | &dev_attr_rx_dropped.attr, | |
386 | &dev_attr_tx_dropped.attr, | |
387 | &dev_attr_multicast.attr, | |
388 | &dev_attr_collisions.attr, | |
389 | &dev_attr_rx_length_errors.attr, | |
390 | &dev_attr_rx_over_errors.attr, | |
391 | &dev_attr_rx_crc_errors.attr, | |
392 | &dev_attr_rx_frame_errors.attr, | |
393 | &dev_attr_rx_fifo_errors.attr, | |
394 | &dev_attr_rx_missed_errors.attr, | |
395 | &dev_attr_tx_aborted_errors.attr, | |
396 | &dev_attr_tx_carrier_errors.attr, | |
397 | &dev_attr_tx_fifo_errors.attr, | |
398 | &dev_attr_tx_heartbeat_errors.attr, | |
399 | &dev_attr_tx_window_errors.attr, | |
400 | &dev_attr_rx_compressed.attr, | |
401 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
402 | NULL |
403 | }; | |
404 | ||
405 | ||
406 | static struct attribute_group netstat_group = { | |
407 | .name = "statistics", | |
408 | .attrs = netstat_attrs, | |
409 | }; | |
410 | ||
22bb1be4 | 411 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 412 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 413 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
414 | ssize_t (*format)(const struct iw_statistics *, |
415 | char *)) | |
416 | { | |
43cb76d9 | 417 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 418 | const struct iw_statistics *iw; |
1da177e4 | 419 | ssize_t ret = -EINVAL; |
4ec93edb | 420 | |
b8afe641 EB |
421 | if (!rtnl_trylock()) |
422 | return restart_syscall(); | |
6dd214b5 | 423 | if (dev_isalive(dev)) { |
8f1546ca JB |
424 | iw = get_wireless_stats(dev); |
425 | if (iw) | |
6dd214b5 AB |
426 | ret = (*format)(iw, buf); |
427 | } | |
a160ee69 | 428 | rtnl_unlock(); |
1da177e4 LT |
429 | |
430 | return ret; | |
431 | } | |
432 | ||
433 | /* show function template for wireless fields */ | |
434 | #define WIRELESS_SHOW(name, field, format_string) \ | |
435 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
436 | { \ | |
437 | return sprintf(buf, format_string, iw->field); \ | |
438 | } \ | |
43cb76d9 GKH |
439 | static ssize_t show_iw_##name(struct device *d, \ |
440 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 441 | { \ |
43cb76d9 | 442 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 443 | } \ |
43cb76d9 | 444 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
445 | |
446 | WIRELESS_SHOW(status, status, fmt_hex); | |
447 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
448 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
449 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
450 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
451 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
452 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
453 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
454 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
455 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
456 | ||
457 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
458 | &dev_attr_status.attr, |
459 | &dev_attr_link.attr, | |
460 | &dev_attr_level.attr, | |
461 | &dev_attr_noise.attr, | |
462 | &dev_attr_nwid.attr, | |
463 | &dev_attr_crypt.attr, | |
464 | &dev_attr_fragment.attr, | |
465 | &dev_attr_retries.attr, | |
466 | &dev_attr_misc.attr, | |
467 | &dev_attr_beacon.attr, | |
1da177e4 LT |
468 | NULL |
469 | }; | |
470 | ||
471 | static struct attribute_group wireless_group = { | |
472 | .name = "wireless", | |
473 | .attrs = wireless_attrs, | |
474 | }; | |
475 | #endif | |
d6523ddf | 476 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 477 | |
30bde1f5 | 478 | #ifdef CONFIG_RPS |
0a9627f2 TH |
479 | /* |
480 | * RX queue sysfs structures and functions. | |
481 | */ | |
482 | struct rx_queue_attribute { | |
483 | struct attribute attr; | |
484 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
485 | struct rx_queue_attribute *attr, char *buf); | |
486 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
487 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
488 | }; | |
489 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
490 | struct rx_queue_attribute, attr) | |
491 | ||
492 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
493 | ||
494 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
495 | char *buf) | |
496 | { | |
497 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
498 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
499 | ||
500 | if (!attribute->show) | |
501 | return -EIO; | |
502 | ||
503 | return attribute->show(queue, attribute, buf); | |
504 | } | |
505 | ||
506 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
507 | const char *buf, size_t count) | |
508 | { | |
509 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
510 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
511 | ||
512 | if (!attribute->store) | |
513 | return -EIO; | |
514 | ||
515 | return attribute->store(queue, attribute, buf, count); | |
516 | } | |
517 | ||
fa50d645 | 518 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
519 | .show = rx_queue_attr_show, |
520 | .store = rx_queue_attr_store, | |
521 | }; | |
522 | ||
523 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
524 | struct rx_queue_attribute *attribute, char *buf) | |
525 | { | |
526 | struct rps_map *map; | |
527 | cpumask_var_t mask; | |
528 | size_t len = 0; | |
529 | int i; | |
530 | ||
531 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
532 | return -ENOMEM; | |
533 | ||
534 | rcu_read_lock(); | |
535 | map = rcu_dereference(queue->rps_map); | |
536 | if (map) | |
537 | for (i = 0; i < map->len; i++) | |
538 | cpumask_set_cpu(map->cpus[i], mask); | |
539 | ||
540 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
541 | if (PAGE_SIZE - len < 3) { | |
542 | rcu_read_unlock(); | |
543 | free_cpumask_var(mask); | |
544 | return -EINVAL; | |
545 | } | |
546 | rcu_read_unlock(); | |
547 | ||
548 | free_cpumask_var(mask); | |
549 | len += sprintf(buf + len, "\n"); | |
550 | return len; | |
551 | } | |
552 | ||
553 | static void rps_map_release(struct rcu_head *rcu) | |
554 | { | |
555 | struct rps_map *map = container_of(rcu, struct rps_map, rcu); | |
556 | ||
557 | kfree(map); | |
558 | } | |
559 | ||
f5acb907 | 560 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
561 | struct rx_queue_attribute *attribute, |
562 | const char *buf, size_t len) | |
563 | { | |
564 | struct rps_map *old_map, *map; | |
565 | cpumask_var_t mask; | |
566 | int err, cpu, i; | |
567 | static DEFINE_SPINLOCK(rps_map_lock); | |
568 | ||
569 | if (!capable(CAP_NET_ADMIN)) | |
570 | return -EPERM; | |
571 | ||
572 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
573 | return -ENOMEM; | |
574 | ||
575 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
576 | if (err) { | |
577 | free_cpumask_var(mask); | |
578 | return err; | |
579 | } | |
580 | ||
581 | map = kzalloc(max_t(unsigned, | |
582 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
583 | GFP_KERNEL); | |
584 | if (!map) { | |
585 | free_cpumask_var(mask); | |
586 | return -ENOMEM; | |
587 | } | |
588 | ||
589 | i = 0; | |
590 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
591 | map->cpus[i++] = cpu; | |
592 | ||
593 | if (i) | |
594 | map->len = i; | |
595 | else { | |
596 | kfree(map); | |
597 | map = NULL; | |
598 | } | |
599 | ||
600 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
601 | old_map = rcu_dereference_protected(queue->rps_map, |
602 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
603 | rcu_assign_pointer(queue->rps_map, map); |
604 | spin_unlock(&rps_map_lock); | |
605 | ||
606 | if (old_map) | |
607 | call_rcu(&old_map->rcu, rps_map_release); | |
608 | ||
609 | free_cpumask_var(mask); | |
610 | return len; | |
611 | } | |
612 | ||
fec5e652 TH |
613 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
614 | struct rx_queue_attribute *attr, | |
615 | char *buf) | |
616 | { | |
617 | struct rps_dev_flow_table *flow_table; | |
618 | unsigned int val = 0; | |
619 | ||
620 | rcu_read_lock(); | |
621 | flow_table = rcu_dereference(queue->rps_flow_table); | |
622 | if (flow_table) | |
623 | val = flow_table->mask + 1; | |
624 | rcu_read_unlock(); | |
625 | ||
626 | return sprintf(buf, "%u\n", val); | |
627 | } | |
628 | ||
629 | static void rps_dev_flow_table_release_work(struct work_struct *work) | |
630 | { | |
631 | struct rps_dev_flow_table *table = container_of(work, | |
632 | struct rps_dev_flow_table, free_work); | |
633 | ||
634 | vfree(table); | |
635 | } | |
636 | ||
637 | static void rps_dev_flow_table_release(struct rcu_head *rcu) | |
638 | { | |
639 | struct rps_dev_flow_table *table = container_of(rcu, | |
640 | struct rps_dev_flow_table, rcu); | |
641 | ||
642 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); | |
643 | schedule_work(&table->free_work); | |
644 | } | |
645 | ||
f5acb907 | 646 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
647 | struct rx_queue_attribute *attr, |
648 | const char *buf, size_t len) | |
649 | { | |
650 | unsigned int count; | |
651 | char *endp; | |
652 | struct rps_dev_flow_table *table, *old_table; | |
653 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
654 | ||
655 | if (!capable(CAP_NET_ADMIN)) | |
656 | return -EPERM; | |
657 | ||
658 | count = simple_strtoul(buf, &endp, 0); | |
659 | if (endp == buf) | |
660 | return -EINVAL; | |
661 | ||
662 | if (count) { | |
663 | int i; | |
664 | ||
665 | if (count > 1<<30) { | |
666 | /* Enforce a limit to prevent overflow */ | |
667 | return -EINVAL; | |
668 | } | |
669 | count = roundup_pow_of_two(count); | |
670 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count)); | |
671 | if (!table) | |
672 | return -ENOMEM; | |
673 | ||
674 | table->mask = count - 1; | |
675 | for (i = 0; i < count; i++) | |
676 | table->flows[i].cpu = RPS_NO_CPU; | |
677 | } else | |
678 | table = NULL; | |
679 | ||
680 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
681 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
682 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
683 | rcu_assign_pointer(queue->rps_flow_table, table); |
684 | spin_unlock(&rps_dev_flow_lock); | |
685 | ||
686 | if (old_table) | |
687 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
688 | ||
689 | return len; | |
690 | } | |
691 | ||
0a9627f2 TH |
692 | static struct rx_queue_attribute rps_cpus_attribute = |
693 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
694 | ||
fec5e652 TH |
695 | |
696 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
697 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
698 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
699 | ||
0a9627f2 TH |
700 | static struct attribute *rx_queue_default_attrs[] = { |
701 | &rps_cpus_attribute.attr, | |
fec5e652 | 702 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
703 | NULL |
704 | }; | |
705 | ||
706 | static void rx_queue_release(struct kobject *kobj) | |
707 | { | |
708 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
0a9627f2 | 709 | struct netdev_rx_queue *first = queue->first; |
6e3f7faf ED |
710 | struct rps_map *map; |
711 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 712 | |
fec5e652 | 713 | |
6e3f7faf ED |
714 | map = rcu_dereference_raw(queue->rps_map); |
715 | if (map) | |
716 | call_rcu(&map->rcu, rps_map_release); | |
717 | ||
718 | flow_table = rcu_dereference_raw(queue->rps_flow_table); | |
719 | if (flow_table) | |
720 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); | |
0a9627f2 TH |
721 | |
722 | if (atomic_dec_and_test(&first->count)) | |
723 | kfree(first); | |
724 | } | |
725 | ||
726 | static struct kobj_type rx_queue_ktype = { | |
727 | .sysfs_ops = &rx_queue_sysfs_ops, | |
728 | .release = rx_queue_release, | |
729 | .default_attrs = rx_queue_default_attrs, | |
730 | }; | |
731 | ||
732 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
733 | { | |
734 | struct netdev_rx_queue *queue = net->_rx + index; | |
4315d834 | 735 | struct netdev_rx_queue *first = queue->first; |
0a9627f2 TH |
736 | struct kobject *kobj = &queue->kobj; |
737 | int error = 0; | |
738 | ||
739 | kobj->kset = net->queues_kset; | |
740 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
741 | "rx-%u", index); | |
742 | if (error) { | |
743 | kobject_put(kobj); | |
744 | return error; | |
745 | } | |
746 | ||
747 | kobject_uevent(kobj, KOBJ_ADD); | |
4315d834 | 748 | atomic_inc(&first->count); |
0a9627f2 TH |
749 | |
750 | return error; | |
751 | } | |
752 | ||
62fe0b40 BH |
753 | int |
754 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 TH |
755 | { |
756 | int i; | |
757 | int error = 0; | |
758 | ||
62fe0b40 | 759 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 760 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
761 | if (error) { |
762 | new_num = old_num; | |
0a9627f2 | 763 | break; |
62fe0b40 | 764 | } |
0a9627f2 TH |
765 | } |
766 | ||
62fe0b40 BH |
767 | while (--i >= new_num) |
768 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
769 | |
770 | return error; | |
771 | } | |
772 | ||
62fe0b40 | 773 | static int rx_queue_register_kobjects(struct net_device *net) |
0a9627f2 | 774 | { |
62fe0b40 BH |
775 | net->queues_kset = kset_create_and_add("queues", |
776 | NULL, &net->dev.kobj); | |
777 | if (!net->queues_kset) | |
778 | return -ENOMEM; | |
779 | return net_rx_queue_update_kobjects(net, 0, net->real_num_rx_queues); | |
780 | } | |
0a9627f2 | 781 | |
62fe0b40 BH |
782 | static void rx_queue_remove_kobjects(struct net_device *net) |
783 | { | |
784 | net_rx_queue_update_kobjects(net, net->real_num_rx_queues, 0); | |
0a9627f2 TH |
785 | kset_unregister(net->queues_kset); |
786 | } | |
30bde1f5 | 787 | #endif /* CONFIG_RPS */ |
608b4b95 EB |
788 | |
789 | static const void *net_current_ns(void) | |
790 | { | |
791 | return current->nsproxy->net_ns; | |
792 | } | |
793 | ||
794 | static const void *net_initial_ns(void) | |
795 | { | |
796 | return &init_net; | |
797 | } | |
798 | ||
799 | static const void *net_netlink_ns(struct sock *sk) | |
800 | { | |
801 | return sock_net(sk); | |
802 | } | |
803 | ||
04600794 | 804 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 EB |
805 | .type = KOBJ_NS_TYPE_NET, |
806 | .current_ns = net_current_ns, | |
807 | .netlink_ns = net_netlink_ns, | |
808 | .initial_ns = net_initial_ns, | |
809 | }; | |
04600794 | 810 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 EB |
811 | |
812 | static void net_kobj_ns_exit(struct net *net) | |
813 | { | |
814 | kobj_ns_exit(KOBJ_NS_TYPE_NET, net); | |
815 | } | |
816 | ||
d6523ddf | 817 | static struct pernet_operations kobj_net_ops = { |
608b4b95 EB |
818 | .exit = net_kobj_ns_exit, |
819 | }; | |
820 | ||
8b41d188 | 821 | |
1da177e4 | 822 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 823 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 824 | { |
43cb76d9 | 825 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 826 | int retval; |
1da177e4 | 827 | |
312c004d | 828 | /* pass interface to uevent. */ |
7eff2e7a | 829 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
830 | if (retval) |
831 | goto exit; | |
ca2f37db JT |
832 | |
833 | /* pass ifindex to uevent. | |
834 | * ifindex is useful as it won't change (interface name may change) | |
835 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 836 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 837 | |
bf62456e | 838 | exit: |
bf62456e | 839 | return retval; |
1da177e4 LT |
840 | } |
841 | #endif | |
842 | ||
843 | /* | |
4ec93edb | 844 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 845 | * Called when last reference to device kobject is gone. |
1da177e4 | 846 | */ |
43cb76d9 | 847 | static void netdev_release(struct device *d) |
1da177e4 | 848 | { |
43cb76d9 | 849 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
850 | |
851 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
852 | ||
0b815a1a | 853 | kfree(dev->ifalias); |
1da177e4 LT |
854 | kfree((char *)dev - dev->padded); |
855 | } | |
856 | ||
608b4b95 EB |
857 | static const void *net_namespace(struct device *d) |
858 | { | |
859 | struct net_device *dev; | |
860 | dev = container_of(d, struct net_device, dev); | |
861 | return dev_net(dev); | |
862 | } | |
863 | ||
1da177e4 LT |
864 | static struct class net_class = { |
865 | .name = "net", | |
43cb76d9 | 866 | .dev_release = netdev_release, |
8b41d188 | 867 | #ifdef CONFIG_SYSFS |
43cb76d9 | 868 | .dev_attrs = net_class_attributes, |
8b41d188 | 869 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 870 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 871 | .dev_uevent = netdev_uevent, |
1da177e4 | 872 | #endif |
608b4b95 EB |
873 | .ns_type = &net_ns_type_operations, |
874 | .namespace = net_namespace, | |
1da177e4 LT |
875 | }; |
876 | ||
9093bbb2 SH |
877 | /* Delete sysfs entries but hold kobject reference until after all |
878 | * netdev references are gone. | |
879 | */ | |
8b41d188 | 880 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 881 | { |
9093bbb2 SH |
882 | struct device *dev = &(net->dev); |
883 | ||
884 | kobject_get(&dev->kobj); | |
3891845e | 885 | |
30bde1f5 | 886 | #ifdef CONFIG_RPS |
0a9627f2 | 887 | rx_queue_remove_kobjects(net); |
e880eb6c | 888 | #endif |
0a9627f2 | 889 | |
9093bbb2 | 890 | device_del(dev); |
1da177e4 LT |
891 | } |
892 | ||
893 | /* Create sysfs entries for network device. */ | |
8b41d188 | 894 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 895 | { |
43cb76d9 | 896 | struct device *dev = &(net->dev); |
a4dbd674 | 897 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 898 | int error = 0; |
1da177e4 | 899 | |
a1b3f594 | 900 | device_initialize(dev); |
43cb76d9 GKH |
901 | dev->class = &net_class; |
902 | dev->platform_data = net; | |
903 | dev->groups = groups; | |
1da177e4 | 904 | |
a2205472 | 905 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 906 | |
8b41d188 | 907 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
908 | /* Allow for a device specific group */ |
909 | if (*groups) | |
910 | groups++; | |
1da177e4 | 911 | |
0c509a6c | 912 | *groups++ = &netstat_group; |
22bb1be4 | 913 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 914 | if (net->ieee80211_ptr) |
fe9925b5 | 915 | *groups++ = &wireless_group; |
3d23e349 JB |
916 | #ifdef CONFIG_WIRELESS_EXT |
917 | else if (net->wireless_handlers) | |
918 | *groups++ = &wireless_group; | |
919 | #endif | |
1da177e4 | 920 | #endif |
8b41d188 | 921 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 922 | |
0a9627f2 TH |
923 | error = device_add(dev); |
924 | if (error) | |
925 | return error; | |
926 | ||
30bde1f5 | 927 | #ifdef CONFIG_RPS |
0a9627f2 TH |
928 | error = rx_queue_register_kobjects(net); |
929 | if (error) { | |
930 | device_del(dev); | |
931 | return error; | |
932 | } | |
e880eb6c | 933 | #endif |
0a9627f2 TH |
934 | |
935 | return error; | |
1da177e4 LT |
936 | } |
937 | ||
b8a9787e JV |
938 | int netdev_class_create_file(struct class_attribute *class_attr) |
939 | { | |
940 | return class_create_file(&net_class, class_attr); | |
941 | } | |
9e34a5b5 | 942 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
943 | |
944 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
945 | { | |
946 | class_remove_file(&net_class, class_attr); | |
947 | } | |
b8a9787e JV |
948 | EXPORT_SYMBOL(netdev_class_remove_file); |
949 | ||
8b41d188 | 950 | int netdev_kobject_init(void) |
1da177e4 | 951 | { |
608b4b95 | 952 | kobj_ns_type_register(&net_ns_type_operations); |
d6523ddf | 953 | register_pernet_subsys(&kobj_net_ops); |
1da177e4 LT |
954 | return class_register(&net_class); |
955 | } |