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 | 30 | static const char fmt_dec[] = "%d\n"; |
8ae6daca | 31 | static const char fmt_udec[] = "%u\n"; |
1da177e4 | 32 | static const char fmt_ulong[] = "%lu\n"; |
be1f3c2c | 33 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 34 | |
4ec93edb | 35 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 36 | { |
fe9925b5 | 37 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
38 | } |
39 | ||
40 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
41 | static ssize_t netdev_show(const struct device *dev, |
42 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
43 | ssize_t (*format)(const struct net_device *, char *)) |
44 | { | |
43cb76d9 | 45 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
46 | ssize_t ret = -EINVAL; |
47 | ||
48 | read_lock(&dev_base_lock); | |
49 | if (dev_isalive(net)) | |
50 | ret = (*format)(net, buf); | |
51 | read_unlock(&dev_base_lock); | |
52 | ||
53 | return ret; | |
54 | } | |
55 | ||
56 | /* generate a show function for simple field */ | |
57 | #define NETDEVICE_SHOW(field, format_string) \ | |
58 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
59 | { \ | |
60 | return sprintf(buf, format_string, net->field); \ | |
61 | } \ | |
43cb76d9 GKH |
62 | static ssize_t show_##field(struct device *dev, \ |
63 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 64 | { \ |
43cb76d9 | 65 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
66 | } |
67 | ||
68 | ||
69 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 70 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
71 | const char *buf, size_t len, |
72 | int (*set)(struct net_device *, unsigned long)) | |
73 | { | |
74 | struct net_device *net = to_net_dev(dev); | |
75 | char *endp; | |
76 | unsigned long new; | |
77 | int ret = -EINVAL; | |
78 | ||
79 | if (!capable(CAP_NET_ADMIN)) | |
80 | return -EPERM; | |
81 | ||
82 | new = simple_strtoul(buf, &endp, 0); | |
83 | if (endp == buf) | |
84 | goto err; | |
85 | ||
5a5990d3 | 86 | if (!rtnl_trylock()) |
336ca57c | 87 | return restart_syscall(); |
5a5990d3 | 88 | |
1da177e4 LT |
89 | if (dev_isalive(net)) { |
90 | if ((ret = (*set)(net, new)) == 0) | |
91 | ret = len; | |
92 | } | |
93 | rtnl_unlock(); | |
94 | err: | |
95 | return ret; | |
96 | } | |
97 | ||
9d29672c | 98 | NETDEVICE_SHOW(dev_id, fmt_hex); |
c1f79426 | 99 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
fd586bac KS |
100 | NETDEVICE_SHOW(addr_len, fmt_dec); |
101 | NETDEVICE_SHOW(iflink, fmt_dec); | |
102 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
04ed3e74 | 103 | NETDEVICE_SHOW(features, fmt_hex); |
fd586bac | 104 | NETDEVICE_SHOW(type, fmt_dec); |
b00055aa | 105 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
106 | |
107 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
108 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
109 | char *buf) | |
1da177e4 LT |
110 | { |
111 | struct net_device *net = to_net_dev(dev); | |
112 | ssize_t ret = -EINVAL; | |
113 | ||
114 | read_lock(&dev_base_lock); | |
115 | if (dev_isalive(net)) | |
7ffc49a6 | 116 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
117 | read_unlock(&dev_base_lock); |
118 | return ret; | |
119 | } | |
120 | ||
43cb76d9 GKH |
121 | static ssize_t show_broadcast(struct device *dev, |
122 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
123 | { |
124 | struct net_device *net = to_net_dev(dev); | |
125 | if (dev_isalive(net)) | |
7ffc49a6 | 126 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
127 | return -EINVAL; |
128 | } | |
129 | ||
43cb76d9 GKH |
130 | static ssize_t show_carrier(struct device *dev, |
131 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
132 | { |
133 | struct net_device *netdev = to_net_dev(dev); | |
134 | if (netif_running(netdev)) { | |
135 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
136 | } | |
137 | return -EINVAL; | |
138 | } | |
139 | ||
d519e17e AG |
140 | static ssize_t show_speed(struct device *dev, |
141 | struct device_attribute *attr, char *buf) | |
142 | { | |
143 | struct net_device *netdev = to_net_dev(dev); | |
144 | int ret = -EINVAL; | |
145 | ||
146 | if (!rtnl_trylock()) | |
147 | return restart_syscall(); | |
148 | ||
8ae6daca DD |
149 | if (netif_running(netdev)) { |
150 | struct ethtool_cmd cmd; | |
151 | if (!dev_ethtool_get_settings(netdev, &cmd)) | |
152 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); | |
d519e17e AG |
153 | } |
154 | rtnl_unlock(); | |
155 | return ret; | |
156 | } | |
157 | ||
158 | static ssize_t show_duplex(struct device *dev, | |
159 | struct device_attribute *attr, char *buf) | |
160 | { | |
161 | struct net_device *netdev = to_net_dev(dev); | |
162 | int ret = -EINVAL; | |
163 | ||
164 | if (!rtnl_trylock()) | |
165 | return restart_syscall(); | |
166 | ||
8ae6daca DD |
167 | if (netif_running(netdev)) { |
168 | struct ethtool_cmd cmd; | |
169 | if (!dev_ethtool_get_settings(netdev, &cmd)) | |
170 | ret = sprintf(buf, "%s\n", | |
171 | cmd.duplex ? "full" : "half"); | |
d519e17e AG |
172 | } |
173 | rtnl_unlock(); | |
174 | return ret; | |
175 | } | |
176 | ||
43cb76d9 GKH |
177 | static ssize_t show_dormant(struct device *dev, |
178 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
179 | { |
180 | struct net_device *netdev = to_net_dev(dev); | |
181 | ||
182 | if (netif_running(netdev)) | |
183 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
184 | ||
185 | return -EINVAL; | |
186 | } | |
187 | ||
36cbd3dc | 188 | static const char *const operstates[] = { |
b00055aa SR |
189 | "unknown", |
190 | "notpresent", /* currently unused */ | |
191 | "down", | |
192 | "lowerlayerdown", | |
193 | "testing", /* currently unused */ | |
194 | "dormant", | |
195 | "up" | |
196 | }; | |
197 | ||
43cb76d9 GKH |
198 | static ssize_t show_operstate(struct device *dev, |
199 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
200 | { |
201 | const struct net_device *netdev = to_net_dev(dev); | |
202 | unsigned char operstate; | |
203 | ||
204 | read_lock(&dev_base_lock); | |
205 | operstate = netdev->operstate; | |
206 | if (!netif_running(netdev)) | |
207 | operstate = IF_OPER_DOWN; | |
208 | read_unlock(&dev_base_lock); | |
209 | ||
e3a5cd9e | 210 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
211 | return -EINVAL; /* should not happen */ |
212 | ||
213 | return sprintf(buf, "%s\n", operstates[operstate]); | |
214 | } | |
215 | ||
1da177e4 LT |
216 | /* read-write attributes */ |
217 | NETDEVICE_SHOW(mtu, fmt_dec); | |
218 | ||
219 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
220 | { | |
221 | return dev_set_mtu(net, (int) new_mtu); | |
222 | } | |
223 | ||
43cb76d9 GKH |
224 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
225 | const char *buf, size_t len) | |
1da177e4 | 226 | { |
43cb76d9 | 227 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
228 | } |
229 | ||
1da177e4 LT |
230 | NETDEVICE_SHOW(flags, fmt_hex); |
231 | ||
232 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
233 | { | |
234 | return dev_change_flags(net, (unsigned) new_flags); | |
235 | } | |
236 | ||
43cb76d9 GKH |
237 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
238 | const char *buf, size_t len) | |
1da177e4 | 239 | { |
43cb76d9 | 240 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
241 | } |
242 | ||
1da177e4 LT |
243 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
244 | ||
245 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
246 | { | |
247 | net->tx_queue_len = new_len; | |
248 | return 0; | |
249 | } | |
250 | ||
43cb76d9 GKH |
251 | static ssize_t store_tx_queue_len(struct device *dev, |
252 | struct device_attribute *attr, | |
253 | const char *buf, size_t len) | |
1da177e4 | 254 | { |
43cb76d9 | 255 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
256 | } |
257 | ||
0b815a1a SH |
258 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
259 | const char *buf, size_t len) | |
260 | { | |
261 | struct net_device *netdev = to_net_dev(dev); | |
262 | size_t count = len; | |
263 | ssize_t ret; | |
264 | ||
265 | if (!capable(CAP_NET_ADMIN)) | |
266 | return -EPERM; | |
267 | ||
268 | /* ignore trailing newline */ | |
269 | if (len > 0 && buf[len - 1] == '\n') | |
270 | --count; | |
271 | ||
336ca57c EB |
272 | if (!rtnl_trylock()) |
273 | return restart_syscall(); | |
0b815a1a SH |
274 | ret = dev_set_alias(netdev, buf, count); |
275 | rtnl_unlock(); | |
276 | ||
277 | return ret < 0 ? ret : len; | |
278 | } | |
279 | ||
280 | static ssize_t show_ifalias(struct device *dev, | |
281 | struct device_attribute *attr, char *buf) | |
282 | { | |
283 | const struct net_device *netdev = to_net_dev(dev); | |
284 | ssize_t ret = 0; | |
285 | ||
336ca57c EB |
286 | if (!rtnl_trylock()) |
287 | return restart_syscall(); | |
0b815a1a SH |
288 | if (netdev->ifalias) |
289 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
290 | rtnl_unlock(); | |
291 | return ret; | |
292 | } | |
293 | ||
a512b92b VD |
294 | NETDEVICE_SHOW(group, fmt_dec); |
295 | ||
296 | static int change_group(struct net_device *net, unsigned long new_group) | |
297 | { | |
298 | dev_set_group(net, (int) new_group); | |
299 | return 0; | |
300 | } | |
301 | ||
302 | static ssize_t store_group(struct device *dev, struct device_attribute *attr, | |
303 | const char *buf, size_t len) | |
304 | { | |
305 | return netdev_store(dev, attr, buf, len, change_group); | |
306 | } | |
307 | ||
43cb76d9 | 308 | static struct device_attribute net_class_attributes[] = { |
c1f79426 | 309 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
fd586bac | 310 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 311 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 312 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
313 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
314 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
315 | __ATTR(features, S_IRUGO, show_features, NULL), | |
316 | __ATTR(type, S_IRUGO, show_type, NULL), | |
b00055aa | 317 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
318 | __ATTR(address, S_IRUGO, show_address, NULL), |
319 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
320 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
321 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
322 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
323 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
324 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
325 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
326 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
327 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
328 | store_tx_queue_len), | |
b6644cb7 | 329 | __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), |
fd586bac | 330 | {} |
1da177e4 LT |
331 | }; |
332 | ||
333 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
334 | static ssize_t netstat_show(const struct device *d, |
335 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
336 | unsigned long offset) |
337 | { | |
43cb76d9 | 338 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
339 | ssize_t ret = -EINVAL; |
340 | ||
be1f3c2c BH |
341 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
342 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
343 | |
344 | read_lock(&dev_base_lock); | |
96e74088 | 345 | if (dev_isalive(dev)) { |
28172739 ED |
346 | struct rtnl_link_stats64 temp; |
347 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
348 | ||
be1f3c2c | 349 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 350 | } |
1da177e4 LT |
351 | read_unlock(&dev_base_lock); |
352 | return ret; | |
353 | } | |
354 | ||
355 | /* generate a read-only statistics attribute */ | |
356 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
357 | static ssize_t show_##name(struct device *d, \ |
358 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 359 | { \ |
43cb76d9 | 360 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 361 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 362 | } \ |
43cb76d9 | 363 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
364 | |
365 | NETSTAT_ENTRY(rx_packets); | |
366 | NETSTAT_ENTRY(tx_packets); | |
367 | NETSTAT_ENTRY(rx_bytes); | |
368 | NETSTAT_ENTRY(tx_bytes); | |
369 | NETSTAT_ENTRY(rx_errors); | |
370 | NETSTAT_ENTRY(tx_errors); | |
371 | NETSTAT_ENTRY(rx_dropped); | |
372 | NETSTAT_ENTRY(tx_dropped); | |
373 | NETSTAT_ENTRY(multicast); | |
374 | NETSTAT_ENTRY(collisions); | |
375 | NETSTAT_ENTRY(rx_length_errors); | |
376 | NETSTAT_ENTRY(rx_over_errors); | |
377 | NETSTAT_ENTRY(rx_crc_errors); | |
378 | NETSTAT_ENTRY(rx_frame_errors); | |
379 | NETSTAT_ENTRY(rx_fifo_errors); | |
380 | NETSTAT_ENTRY(rx_missed_errors); | |
381 | NETSTAT_ENTRY(tx_aborted_errors); | |
382 | NETSTAT_ENTRY(tx_carrier_errors); | |
383 | NETSTAT_ENTRY(tx_fifo_errors); | |
384 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
385 | NETSTAT_ENTRY(tx_window_errors); | |
386 | NETSTAT_ENTRY(rx_compressed); | |
387 | NETSTAT_ENTRY(tx_compressed); | |
388 | ||
389 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
390 | &dev_attr_rx_packets.attr, |
391 | &dev_attr_tx_packets.attr, | |
392 | &dev_attr_rx_bytes.attr, | |
393 | &dev_attr_tx_bytes.attr, | |
394 | &dev_attr_rx_errors.attr, | |
395 | &dev_attr_tx_errors.attr, | |
396 | &dev_attr_rx_dropped.attr, | |
397 | &dev_attr_tx_dropped.attr, | |
398 | &dev_attr_multicast.attr, | |
399 | &dev_attr_collisions.attr, | |
400 | &dev_attr_rx_length_errors.attr, | |
401 | &dev_attr_rx_over_errors.attr, | |
402 | &dev_attr_rx_crc_errors.attr, | |
403 | &dev_attr_rx_frame_errors.attr, | |
404 | &dev_attr_rx_fifo_errors.attr, | |
405 | &dev_attr_rx_missed_errors.attr, | |
406 | &dev_attr_tx_aborted_errors.attr, | |
407 | &dev_attr_tx_carrier_errors.attr, | |
408 | &dev_attr_tx_fifo_errors.attr, | |
409 | &dev_attr_tx_heartbeat_errors.attr, | |
410 | &dev_attr_tx_window_errors.attr, | |
411 | &dev_attr_rx_compressed.attr, | |
412 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
413 | NULL |
414 | }; | |
415 | ||
416 | ||
417 | static struct attribute_group netstat_group = { | |
418 | .name = "statistics", | |
419 | .attrs = netstat_attrs, | |
420 | }; | |
421 | ||
22bb1be4 | 422 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 423 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 424 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
425 | ssize_t (*format)(const struct iw_statistics *, |
426 | char *)) | |
427 | { | |
43cb76d9 | 428 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 429 | const struct iw_statistics *iw; |
1da177e4 | 430 | ssize_t ret = -EINVAL; |
4ec93edb | 431 | |
b8afe641 EB |
432 | if (!rtnl_trylock()) |
433 | return restart_syscall(); | |
6dd214b5 | 434 | if (dev_isalive(dev)) { |
8f1546ca JB |
435 | iw = get_wireless_stats(dev); |
436 | if (iw) | |
6dd214b5 AB |
437 | ret = (*format)(iw, buf); |
438 | } | |
a160ee69 | 439 | rtnl_unlock(); |
1da177e4 LT |
440 | |
441 | return ret; | |
442 | } | |
443 | ||
444 | /* show function template for wireless fields */ | |
445 | #define WIRELESS_SHOW(name, field, format_string) \ | |
446 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
447 | { \ | |
448 | return sprintf(buf, format_string, iw->field); \ | |
449 | } \ | |
43cb76d9 GKH |
450 | static ssize_t show_iw_##name(struct device *d, \ |
451 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 452 | { \ |
43cb76d9 | 453 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 454 | } \ |
43cb76d9 | 455 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
456 | |
457 | WIRELESS_SHOW(status, status, fmt_hex); | |
458 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
459 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
460 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
461 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
462 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
463 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
464 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
465 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
466 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
467 | ||
468 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
469 | &dev_attr_status.attr, |
470 | &dev_attr_link.attr, | |
471 | &dev_attr_level.attr, | |
472 | &dev_attr_noise.attr, | |
473 | &dev_attr_nwid.attr, | |
474 | &dev_attr_crypt.attr, | |
475 | &dev_attr_fragment.attr, | |
476 | &dev_attr_retries.attr, | |
477 | &dev_attr_misc.attr, | |
478 | &dev_attr_beacon.attr, | |
1da177e4 LT |
479 | NULL |
480 | }; | |
481 | ||
482 | static struct attribute_group wireless_group = { | |
483 | .name = "wireless", | |
484 | .attrs = wireless_attrs, | |
485 | }; | |
486 | #endif | |
d6523ddf | 487 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 488 | |
30bde1f5 | 489 | #ifdef CONFIG_RPS |
0a9627f2 TH |
490 | /* |
491 | * RX queue sysfs structures and functions. | |
492 | */ | |
493 | struct rx_queue_attribute { | |
494 | struct attribute attr; | |
495 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
496 | struct rx_queue_attribute *attr, char *buf); | |
497 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
498 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
499 | }; | |
500 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
501 | struct rx_queue_attribute, attr) | |
502 | ||
503 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
504 | ||
505 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
506 | char *buf) | |
507 | { | |
508 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
509 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
510 | ||
511 | if (!attribute->show) | |
512 | return -EIO; | |
513 | ||
514 | return attribute->show(queue, attribute, buf); | |
515 | } | |
516 | ||
517 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
518 | const char *buf, size_t count) | |
519 | { | |
520 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
521 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
522 | ||
523 | if (!attribute->store) | |
524 | return -EIO; | |
525 | ||
526 | return attribute->store(queue, attribute, buf, count); | |
527 | } | |
528 | ||
fa50d645 | 529 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
530 | .show = rx_queue_attr_show, |
531 | .store = rx_queue_attr_store, | |
532 | }; | |
533 | ||
534 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
535 | struct rx_queue_attribute *attribute, char *buf) | |
536 | { | |
537 | struct rps_map *map; | |
538 | cpumask_var_t mask; | |
539 | size_t len = 0; | |
540 | int i; | |
541 | ||
542 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
543 | return -ENOMEM; | |
544 | ||
545 | rcu_read_lock(); | |
546 | map = rcu_dereference(queue->rps_map); | |
547 | if (map) | |
548 | for (i = 0; i < map->len; i++) | |
549 | cpumask_set_cpu(map->cpus[i], mask); | |
550 | ||
551 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
552 | if (PAGE_SIZE - len < 3) { | |
553 | rcu_read_unlock(); | |
554 | free_cpumask_var(mask); | |
555 | return -EINVAL; | |
556 | } | |
557 | rcu_read_unlock(); | |
558 | ||
559 | free_cpumask_var(mask); | |
560 | len += sprintf(buf + len, "\n"); | |
561 | return len; | |
562 | } | |
563 | ||
564 | static void rps_map_release(struct rcu_head *rcu) | |
565 | { | |
566 | struct rps_map *map = container_of(rcu, struct rps_map, rcu); | |
567 | ||
568 | kfree(map); | |
569 | } | |
570 | ||
f5acb907 | 571 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
572 | struct rx_queue_attribute *attribute, |
573 | const char *buf, size_t len) | |
574 | { | |
575 | struct rps_map *old_map, *map; | |
576 | cpumask_var_t mask; | |
577 | int err, cpu, i; | |
578 | static DEFINE_SPINLOCK(rps_map_lock); | |
579 | ||
580 | if (!capable(CAP_NET_ADMIN)) | |
581 | return -EPERM; | |
582 | ||
583 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
584 | return -ENOMEM; | |
585 | ||
586 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
587 | if (err) { | |
588 | free_cpumask_var(mask); | |
589 | return err; | |
590 | } | |
591 | ||
592 | map = kzalloc(max_t(unsigned, | |
593 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
594 | GFP_KERNEL); | |
595 | if (!map) { | |
596 | free_cpumask_var(mask); | |
597 | return -ENOMEM; | |
598 | } | |
599 | ||
600 | i = 0; | |
601 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
602 | map->cpus[i++] = cpu; | |
603 | ||
604 | if (i) | |
605 | map->len = i; | |
606 | else { | |
607 | kfree(map); | |
608 | map = NULL; | |
609 | } | |
610 | ||
611 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
612 | old_map = rcu_dereference_protected(queue->rps_map, |
613 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
614 | rcu_assign_pointer(queue->rps_map, map); |
615 | spin_unlock(&rps_map_lock); | |
616 | ||
617 | if (old_map) | |
618 | call_rcu(&old_map->rcu, rps_map_release); | |
619 | ||
620 | free_cpumask_var(mask); | |
621 | return len; | |
622 | } | |
623 | ||
fec5e652 TH |
624 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
625 | struct rx_queue_attribute *attr, | |
626 | char *buf) | |
627 | { | |
628 | struct rps_dev_flow_table *flow_table; | |
629 | unsigned int val = 0; | |
630 | ||
631 | rcu_read_lock(); | |
632 | flow_table = rcu_dereference(queue->rps_flow_table); | |
633 | if (flow_table) | |
634 | val = flow_table->mask + 1; | |
635 | rcu_read_unlock(); | |
636 | ||
637 | return sprintf(buf, "%u\n", val); | |
638 | } | |
639 | ||
640 | static void rps_dev_flow_table_release_work(struct work_struct *work) | |
641 | { | |
642 | struct rps_dev_flow_table *table = container_of(work, | |
643 | struct rps_dev_flow_table, free_work); | |
644 | ||
645 | vfree(table); | |
646 | } | |
647 | ||
648 | static void rps_dev_flow_table_release(struct rcu_head *rcu) | |
649 | { | |
650 | struct rps_dev_flow_table *table = container_of(rcu, | |
651 | struct rps_dev_flow_table, rcu); | |
652 | ||
653 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); | |
654 | schedule_work(&table->free_work); | |
655 | } | |
656 | ||
f5acb907 | 657 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
658 | struct rx_queue_attribute *attr, |
659 | const char *buf, size_t len) | |
660 | { | |
661 | unsigned int count; | |
662 | char *endp; | |
663 | struct rps_dev_flow_table *table, *old_table; | |
664 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
665 | ||
666 | if (!capable(CAP_NET_ADMIN)) | |
667 | return -EPERM; | |
668 | ||
669 | count = simple_strtoul(buf, &endp, 0); | |
670 | if (endp == buf) | |
671 | return -EINVAL; | |
672 | ||
673 | if (count) { | |
674 | int i; | |
675 | ||
676 | if (count > 1<<30) { | |
677 | /* Enforce a limit to prevent overflow */ | |
678 | return -EINVAL; | |
679 | } | |
680 | count = roundup_pow_of_two(count); | |
681 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count)); | |
682 | if (!table) | |
683 | return -ENOMEM; | |
684 | ||
685 | table->mask = count - 1; | |
686 | for (i = 0; i < count; i++) | |
687 | table->flows[i].cpu = RPS_NO_CPU; | |
688 | } else | |
689 | table = NULL; | |
690 | ||
691 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
692 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
693 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
694 | rcu_assign_pointer(queue->rps_flow_table, table); |
695 | spin_unlock(&rps_dev_flow_lock); | |
696 | ||
697 | if (old_table) | |
698 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
699 | ||
700 | return len; | |
701 | } | |
702 | ||
0a9627f2 TH |
703 | static struct rx_queue_attribute rps_cpus_attribute = |
704 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
705 | ||
fec5e652 TH |
706 | |
707 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
708 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
709 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
710 | ||
0a9627f2 TH |
711 | static struct attribute *rx_queue_default_attrs[] = { |
712 | &rps_cpus_attribute.attr, | |
fec5e652 | 713 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
714 | NULL |
715 | }; | |
716 | ||
717 | static void rx_queue_release(struct kobject *kobj) | |
718 | { | |
719 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
6e3f7faf ED |
720 | struct rps_map *map; |
721 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 722 | |
fec5e652 | 723 | |
6e3f7faf | 724 | map = rcu_dereference_raw(queue->rps_map); |
9ea19481 JF |
725 | if (map) { |
726 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
6e3f7faf | 727 | call_rcu(&map->rcu, rps_map_release); |
9ea19481 | 728 | } |
6e3f7faf ED |
729 | |
730 | flow_table = rcu_dereference_raw(queue->rps_flow_table); | |
9ea19481 JF |
731 | if (flow_table) { |
732 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 733 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 734 | } |
0a9627f2 | 735 | |
9ea19481 | 736 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 737 | dev_put(queue->dev); |
0a9627f2 TH |
738 | } |
739 | ||
740 | static struct kobj_type rx_queue_ktype = { | |
741 | .sysfs_ops = &rx_queue_sysfs_ops, | |
742 | .release = rx_queue_release, | |
743 | .default_attrs = rx_queue_default_attrs, | |
744 | }; | |
745 | ||
746 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
747 | { | |
748 | struct netdev_rx_queue *queue = net->_rx + index; | |
749 | struct kobject *kobj = &queue->kobj; | |
750 | int error = 0; | |
751 | ||
752 | kobj->kset = net->queues_kset; | |
753 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
754 | "rx-%u", index); | |
755 | if (error) { | |
756 | kobject_put(kobj); | |
757 | return error; | |
758 | } | |
759 | ||
760 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 761 | dev_hold(queue->dev); |
0a9627f2 TH |
762 | |
763 | return error; | |
764 | } | |
bf264145 | 765 | #endif /* CONFIG_RPS */ |
0a9627f2 | 766 | |
62fe0b40 BH |
767 | int |
768 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 769 | { |
bf264145 | 770 | #ifdef CONFIG_RPS |
0a9627f2 TH |
771 | int i; |
772 | int error = 0; | |
773 | ||
62fe0b40 | 774 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 775 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
776 | if (error) { |
777 | new_num = old_num; | |
0a9627f2 | 778 | break; |
62fe0b40 | 779 | } |
0a9627f2 TH |
780 | } |
781 | ||
62fe0b40 BH |
782 | while (--i >= new_num) |
783 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
784 | |
785 | return error; | |
bf264145 TH |
786 | #else |
787 | return 0; | |
788 | #endif | |
0a9627f2 TH |
789 | } |
790 | ||
bf264145 | 791 | #ifdef CONFIG_XPS |
1d24eb48 TH |
792 | /* |
793 | * netdev_queue sysfs structures and functions. | |
794 | */ | |
795 | struct netdev_queue_attribute { | |
796 | struct attribute attr; | |
797 | ssize_t (*show)(struct netdev_queue *queue, | |
798 | struct netdev_queue_attribute *attr, char *buf); | |
799 | ssize_t (*store)(struct netdev_queue *queue, | |
800 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
801 | }; | |
802 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
803 | struct netdev_queue_attribute, attr) | |
804 | ||
805 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
806 | ||
807 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
808 | struct attribute *attr, char *buf) | |
809 | { | |
810 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
811 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
812 | ||
813 | if (!attribute->show) | |
814 | return -EIO; | |
815 | ||
816 | return attribute->show(queue, attribute, buf); | |
817 | } | |
818 | ||
819 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
820 | struct attribute *attr, | |
821 | const char *buf, size_t count) | |
822 | { | |
823 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
824 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
825 | ||
826 | if (!attribute->store) | |
827 | return -EIO; | |
828 | ||
829 | return attribute->store(queue, attribute, buf, count); | |
830 | } | |
831 | ||
832 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
833 | .show = netdev_queue_attr_show, | |
834 | .store = netdev_queue_attr_store, | |
835 | }; | |
836 | ||
837 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) | |
0a9627f2 | 838 | { |
1d24eb48 TH |
839 | struct net_device *dev = queue->dev; |
840 | int i; | |
841 | ||
842 | for (i = 0; i < dev->num_tx_queues; i++) | |
843 | if (queue == &dev->_tx[i]) | |
844 | break; | |
845 | ||
846 | BUG_ON(i >= dev->num_tx_queues); | |
847 | ||
848 | return i; | |
849 | } | |
850 | ||
851 | ||
852 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
853 | struct netdev_queue_attribute *attribute, char *buf) | |
854 | { | |
855 | struct net_device *dev = queue->dev; | |
856 | struct xps_dev_maps *dev_maps; | |
857 | cpumask_var_t mask; | |
858 | unsigned long index; | |
859 | size_t len = 0; | |
860 | int i; | |
861 | ||
862 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
863 | return -ENOMEM; | |
864 | ||
865 | index = get_netdev_queue_index(queue); | |
866 | ||
867 | rcu_read_lock(); | |
868 | dev_maps = rcu_dereference(dev->xps_maps); | |
869 | if (dev_maps) { | |
870 | for_each_possible_cpu(i) { | |
871 | struct xps_map *map = | |
872 | rcu_dereference(dev_maps->cpu_map[i]); | |
873 | if (map) { | |
874 | int j; | |
875 | for (j = 0; j < map->len; j++) { | |
876 | if (map->queues[j] == index) { | |
877 | cpumask_set_cpu(i, mask); | |
878 | break; | |
879 | } | |
880 | } | |
881 | } | |
882 | } | |
883 | } | |
884 | rcu_read_unlock(); | |
885 | ||
886 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
887 | if (PAGE_SIZE - len < 3) { | |
888 | free_cpumask_var(mask); | |
889 | return -EINVAL; | |
890 | } | |
891 | ||
892 | free_cpumask_var(mask); | |
893 | len += sprintf(buf + len, "\n"); | |
894 | return len; | |
895 | } | |
896 | ||
897 | static void xps_map_release(struct rcu_head *rcu) | |
898 | { | |
899 | struct xps_map *map = container_of(rcu, struct xps_map, rcu); | |
900 | ||
901 | kfree(map); | |
902 | } | |
903 | ||
904 | static void xps_dev_maps_release(struct rcu_head *rcu) | |
905 | { | |
906 | struct xps_dev_maps *dev_maps = | |
907 | container_of(rcu, struct xps_dev_maps, rcu); | |
908 | ||
909 | kfree(dev_maps); | |
910 | } | |
911 | ||
912 | static DEFINE_MUTEX(xps_map_mutex); | |
a4177869 ED |
913 | #define xmap_dereference(P) \ |
914 | rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex)) | |
1d24eb48 TH |
915 | |
916 | static ssize_t store_xps_map(struct netdev_queue *queue, | |
917 | struct netdev_queue_attribute *attribute, | |
918 | const char *buf, size_t len) | |
919 | { | |
920 | struct net_device *dev = queue->dev; | |
921 | cpumask_var_t mask; | |
922 | int err, i, cpu, pos, map_len, alloc_len, need_set; | |
923 | unsigned long index; | |
924 | struct xps_map *map, *new_map; | |
925 | struct xps_dev_maps *dev_maps, *new_dev_maps; | |
926 | int nonempty = 0; | |
f2cd2d3e | 927 | int numa_node = -2; |
1d24eb48 TH |
928 | |
929 | if (!capable(CAP_NET_ADMIN)) | |
930 | return -EPERM; | |
931 | ||
932 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
933 | return -ENOMEM; | |
934 | ||
935 | index = get_netdev_queue_index(queue); | |
936 | ||
937 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
938 | if (err) { | |
939 | free_cpumask_var(mask); | |
940 | return err; | |
941 | } | |
942 | ||
943 | new_dev_maps = kzalloc(max_t(unsigned, | |
944 | XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL); | |
945 | if (!new_dev_maps) { | |
946 | free_cpumask_var(mask); | |
947 | return -ENOMEM; | |
948 | } | |
949 | ||
950 | mutex_lock(&xps_map_mutex); | |
951 | ||
a4177869 | 952 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
953 | |
954 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
955 | map = dev_maps ? |
956 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
957 | new_map = map; | |
1d24eb48 TH |
958 | if (map) { |
959 | for (pos = 0; pos < map->len; pos++) | |
960 | if (map->queues[pos] == index) | |
961 | break; | |
962 | map_len = map->len; | |
963 | alloc_len = map->alloc_len; | |
964 | } else | |
965 | pos = map_len = alloc_len = 0; | |
966 | ||
967 | need_set = cpu_isset(cpu, *mask) && cpu_online(cpu); | |
f2cd2d3e ED |
968 | #ifdef CONFIG_NUMA |
969 | if (need_set) { | |
970 | if (numa_node == -2) | |
971 | numa_node = cpu_to_node(cpu); | |
972 | else if (numa_node != cpu_to_node(cpu)) | |
973 | numa_node = -1; | |
974 | } | |
975 | #endif | |
1d24eb48 TH |
976 | if (need_set && pos >= map_len) { |
977 | /* Need to add queue to this CPU's map */ | |
978 | if (map_len >= alloc_len) { | |
979 | alloc_len = alloc_len ? | |
980 | 2 * alloc_len : XPS_MIN_MAP_ALLOC; | |
b02038a1 ED |
981 | new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len), |
982 | GFP_KERNEL, | |
983 | cpu_to_node(cpu)); | |
1d24eb48 TH |
984 | if (!new_map) |
985 | goto error; | |
986 | new_map->alloc_len = alloc_len; | |
987 | for (i = 0; i < map_len; i++) | |
988 | new_map->queues[i] = map->queues[i]; | |
989 | new_map->len = map_len; | |
990 | } | |
991 | new_map->queues[new_map->len++] = index; | |
992 | } else if (!need_set && pos < map_len) { | |
993 | /* Need to remove queue from this CPU's map */ | |
994 | if (map_len > 1) | |
995 | new_map->queues[pos] = | |
996 | new_map->queues[--new_map->len]; | |
997 | else | |
998 | new_map = NULL; | |
999 | } | |
a4177869 | 1000 | RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map); |
1d24eb48 TH |
1001 | } |
1002 | ||
1003 | /* Cleanup old maps */ | |
1004 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
1005 | map = dev_maps ? |
1006 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
1007 | if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map) | |
1d24eb48 TH |
1008 | call_rcu(&map->rcu, xps_map_release); |
1009 | if (new_dev_maps->cpu_map[cpu]) | |
1010 | nonempty = 1; | |
1011 | } | |
1012 | ||
1013 | if (nonempty) | |
1014 | rcu_assign_pointer(dev->xps_maps, new_dev_maps); | |
1015 | else { | |
1016 | kfree(new_dev_maps); | |
1017 | rcu_assign_pointer(dev->xps_maps, NULL); | |
1018 | } | |
1019 | ||
1020 | if (dev_maps) | |
1021 | call_rcu(&dev_maps->rcu, xps_dev_maps_release); | |
1022 | ||
b236da69 CG |
1023 | netdev_queue_numa_node_write(queue, (numa_node >= 0) ? numa_node : |
1024 | NUMA_NO_NODE); | |
f2cd2d3e | 1025 | |
1d24eb48 TH |
1026 | mutex_unlock(&xps_map_mutex); |
1027 | ||
1028 | free_cpumask_var(mask); | |
1029 | return len; | |
1030 | ||
1031 | error: | |
1032 | mutex_unlock(&xps_map_mutex); | |
1033 | ||
1034 | if (new_dev_maps) | |
1035 | for_each_possible_cpu(i) | |
a4177869 ED |
1036 | kfree(rcu_dereference_protected( |
1037 | new_dev_maps->cpu_map[i], | |
1038 | 1)); | |
1d24eb48 TH |
1039 | kfree(new_dev_maps); |
1040 | free_cpumask_var(mask); | |
1041 | return -ENOMEM; | |
1042 | } | |
1043 | ||
1044 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1045 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
1046 | ||
1047 | static struct attribute *netdev_queue_default_attrs[] = { | |
1048 | &xps_cpus_attribute.attr, | |
1049 | NULL | |
1050 | }; | |
1051 | ||
1052 | static void netdev_queue_release(struct kobject *kobj) | |
1053 | { | |
1054 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1055 | struct net_device *dev = queue->dev; | |
1056 | struct xps_dev_maps *dev_maps; | |
1057 | struct xps_map *map; | |
1058 | unsigned long index; | |
1059 | int i, pos, nonempty = 0; | |
1060 | ||
1061 | index = get_netdev_queue_index(queue); | |
1062 | ||
1063 | mutex_lock(&xps_map_mutex); | |
a4177869 | 1064 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
1065 | |
1066 | if (dev_maps) { | |
1067 | for_each_possible_cpu(i) { | |
a4177869 | 1068 | map = xmap_dereference(dev_maps->cpu_map[i]); |
1d24eb48 TH |
1069 | if (!map) |
1070 | continue; | |
1071 | ||
1072 | for (pos = 0; pos < map->len; pos++) | |
1073 | if (map->queues[pos] == index) | |
1074 | break; | |
1075 | ||
1076 | if (pos < map->len) { | |
1077 | if (map->len > 1) | |
1078 | map->queues[pos] = | |
1079 | map->queues[--map->len]; | |
1080 | else { | |
1081 | RCU_INIT_POINTER(dev_maps->cpu_map[i], | |
1082 | NULL); | |
1083 | call_rcu(&map->rcu, xps_map_release); | |
1084 | map = NULL; | |
1085 | } | |
1086 | } | |
1087 | if (map) | |
1088 | nonempty = 1; | |
1089 | } | |
1090 | ||
1091 | if (!nonempty) { | |
1092 | RCU_INIT_POINTER(dev->xps_maps, NULL); | |
1093 | call_rcu(&dev_maps->rcu, xps_dev_maps_release); | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | mutex_unlock(&xps_map_mutex); | |
1098 | ||
1099 | memset(kobj, 0, sizeof(*kobj)); | |
1100 | dev_put(queue->dev); | |
1101 | } | |
1102 | ||
1103 | static struct kobj_type netdev_queue_ktype = { | |
1104 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1105 | .release = netdev_queue_release, | |
1106 | .default_attrs = netdev_queue_default_attrs, | |
1107 | }; | |
1108 | ||
1109 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1110 | { | |
1111 | struct netdev_queue *queue = net->_tx + index; | |
1112 | struct kobject *kobj = &queue->kobj; | |
1113 | int error = 0; | |
1114 | ||
1115 | kobj->kset = net->queues_kset; | |
1116 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1117 | "tx-%u", index); | |
1118 | if (error) { | |
1119 | kobject_put(kobj); | |
1120 | return error; | |
1121 | } | |
1122 | ||
1123 | kobject_uevent(kobj, KOBJ_ADD); | |
1124 | dev_hold(queue->dev); | |
1125 | ||
1126 | return error; | |
1127 | } | |
bf264145 | 1128 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1129 | |
1130 | int | |
1131 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1132 | { | |
bf264145 | 1133 | #ifdef CONFIG_XPS |
1d24eb48 TH |
1134 | int i; |
1135 | int error = 0; | |
1136 | ||
1137 | for (i = old_num; i < new_num; i++) { | |
1138 | error = netdev_queue_add_kobject(net, i); | |
1139 | if (error) { | |
1140 | new_num = old_num; | |
1141 | break; | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | while (--i >= new_num) | |
1146 | kobject_put(&net->_tx[i].kobj); | |
1147 | ||
1148 | return error; | |
bf264145 TH |
1149 | #else |
1150 | return 0; | |
1151 | #endif | |
1d24eb48 TH |
1152 | } |
1153 | ||
1154 | static int register_queue_kobjects(struct net_device *net) | |
1155 | { | |
bf264145 | 1156 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1157 | |
bf264145 | 1158 | #if defined(CONFIG_RPS) || defined(CONFIG_XPS) |
62fe0b40 BH |
1159 | net->queues_kset = kset_create_and_add("queues", |
1160 | NULL, &net->dev.kobj); | |
1161 | if (!net->queues_kset) | |
1162 | return -ENOMEM; | |
bf264145 TH |
1163 | #endif |
1164 | ||
1165 | #ifdef CONFIG_RPS | |
1166 | real_rx = net->real_num_rx_queues; | |
1167 | #endif | |
1168 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1169 | |
bf264145 | 1170 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1171 | if (error) |
1172 | goto error; | |
bf264145 | 1173 | rxq = real_rx; |
1d24eb48 | 1174 | |
bf264145 | 1175 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1176 | if (error) |
1177 | goto error; | |
bf264145 | 1178 | txq = real_tx; |
1d24eb48 TH |
1179 | |
1180 | return 0; | |
1181 | ||
1182 | error: | |
1183 | netdev_queue_update_kobjects(net, txq, 0); | |
1184 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1185 | return error; | |
62fe0b40 | 1186 | } |
0a9627f2 | 1187 | |
1d24eb48 | 1188 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1189 | { |
bf264145 TH |
1190 | int real_rx = 0, real_tx = 0; |
1191 | ||
1192 | #ifdef CONFIG_RPS | |
1193 | real_rx = net->real_num_rx_queues; | |
1194 | #endif | |
1195 | real_tx = net->real_num_tx_queues; | |
1196 | ||
1197 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1198 | netdev_queue_update_kobjects(net, real_tx, 0); | |
1199 | #if defined(CONFIG_RPS) || defined(CONFIG_XPS) | |
0a9627f2 | 1200 | kset_unregister(net->queues_kset); |
bf264145 | 1201 | #endif |
0a9627f2 | 1202 | } |
608b4b95 EB |
1203 | |
1204 | static const void *net_current_ns(void) | |
1205 | { | |
1206 | return current->nsproxy->net_ns; | |
1207 | } | |
1208 | ||
1209 | static const void *net_initial_ns(void) | |
1210 | { | |
1211 | return &init_net; | |
1212 | } | |
1213 | ||
1214 | static const void *net_netlink_ns(struct sock *sk) | |
1215 | { | |
1216 | return sock_net(sk); | |
1217 | } | |
1218 | ||
04600794 | 1219 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 EB |
1220 | .type = KOBJ_NS_TYPE_NET, |
1221 | .current_ns = net_current_ns, | |
1222 | .netlink_ns = net_netlink_ns, | |
1223 | .initial_ns = net_initial_ns, | |
1224 | }; | |
04600794 | 1225 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 EB |
1226 | |
1227 | static void net_kobj_ns_exit(struct net *net) | |
1228 | { | |
1229 | kobj_ns_exit(KOBJ_NS_TYPE_NET, net); | |
1230 | } | |
1231 | ||
d6523ddf | 1232 | static struct pernet_operations kobj_net_ops = { |
608b4b95 EB |
1233 | .exit = net_kobj_ns_exit, |
1234 | }; | |
1235 | ||
8b41d188 | 1236 | |
1da177e4 | 1237 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 1238 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1239 | { |
43cb76d9 | 1240 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1241 | int retval; |
1da177e4 | 1242 | |
312c004d | 1243 | /* pass interface to uevent. */ |
7eff2e7a | 1244 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1245 | if (retval) |
1246 | goto exit; | |
ca2f37db JT |
1247 | |
1248 | /* pass ifindex to uevent. | |
1249 | * ifindex is useful as it won't change (interface name may change) | |
1250 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1251 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1252 | |
bf62456e | 1253 | exit: |
bf62456e | 1254 | return retval; |
1da177e4 LT |
1255 | } |
1256 | #endif | |
1257 | ||
1258 | /* | |
4ec93edb | 1259 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1260 | * Called when last reference to device kobject is gone. |
1da177e4 | 1261 | */ |
43cb76d9 | 1262 | static void netdev_release(struct device *d) |
1da177e4 | 1263 | { |
43cb76d9 | 1264 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1265 | |
1266 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1267 | ||
0b815a1a | 1268 | kfree(dev->ifalias); |
1da177e4 LT |
1269 | kfree((char *)dev - dev->padded); |
1270 | } | |
1271 | ||
608b4b95 EB |
1272 | static const void *net_namespace(struct device *d) |
1273 | { | |
1274 | struct net_device *dev; | |
1275 | dev = container_of(d, struct net_device, dev); | |
1276 | return dev_net(dev); | |
1277 | } | |
1278 | ||
1da177e4 LT |
1279 | static struct class net_class = { |
1280 | .name = "net", | |
43cb76d9 | 1281 | .dev_release = netdev_release, |
8b41d188 | 1282 | #ifdef CONFIG_SYSFS |
43cb76d9 | 1283 | .dev_attrs = net_class_attributes, |
8b41d188 | 1284 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1285 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 1286 | .dev_uevent = netdev_uevent, |
1da177e4 | 1287 | #endif |
608b4b95 EB |
1288 | .ns_type = &net_ns_type_operations, |
1289 | .namespace = net_namespace, | |
1da177e4 LT |
1290 | }; |
1291 | ||
9093bbb2 SH |
1292 | /* Delete sysfs entries but hold kobject reference until after all |
1293 | * netdev references are gone. | |
1294 | */ | |
8b41d188 | 1295 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1296 | { |
9093bbb2 SH |
1297 | struct device *dev = &(net->dev); |
1298 | ||
1299 | kobject_get(&dev->kobj); | |
3891845e | 1300 | |
1d24eb48 | 1301 | remove_queue_kobjects(net); |
0a9627f2 | 1302 | |
9093bbb2 | 1303 | device_del(dev); |
1da177e4 LT |
1304 | } |
1305 | ||
1306 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1307 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1308 | { |
43cb76d9 | 1309 | struct device *dev = &(net->dev); |
a4dbd674 | 1310 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1311 | int error = 0; |
1da177e4 | 1312 | |
a1b3f594 | 1313 | device_initialize(dev); |
43cb76d9 GKH |
1314 | dev->class = &net_class; |
1315 | dev->platform_data = net; | |
1316 | dev->groups = groups; | |
1da177e4 | 1317 | |
a2205472 | 1318 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1319 | |
8b41d188 | 1320 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1321 | /* Allow for a device specific group */ |
1322 | if (*groups) | |
1323 | groups++; | |
1da177e4 | 1324 | |
0c509a6c | 1325 | *groups++ = &netstat_group; |
22bb1be4 | 1326 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 1327 | if (net->ieee80211_ptr) |
fe9925b5 | 1328 | *groups++ = &wireless_group; |
3d23e349 JB |
1329 | #ifdef CONFIG_WIRELESS_EXT |
1330 | else if (net->wireless_handlers) | |
1331 | *groups++ = &wireless_group; | |
1332 | #endif | |
1da177e4 | 1333 | #endif |
8b41d188 | 1334 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1335 | |
0a9627f2 TH |
1336 | error = device_add(dev); |
1337 | if (error) | |
1338 | return error; | |
1339 | ||
1d24eb48 | 1340 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1341 | if (error) { |
1342 | device_del(dev); | |
1343 | return error; | |
1344 | } | |
1345 | ||
1346 | return error; | |
1da177e4 LT |
1347 | } |
1348 | ||
b8a9787e JV |
1349 | int netdev_class_create_file(struct class_attribute *class_attr) |
1350 | { | |
1351 | return class_create_file(&net_class, class_attr); | |
1352 | } | |
9e34a5b5 | 1353 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
1354 | |
1355 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
1356 | { | |
1357 | class_remove_file(&net_class, class_attr); | |
1358 | } | |
b8a9787e JV |
1359 | EXPORT_SYMBOL(netdev_class_remove_file); |
1360 | ||
8b41d188 | 1361 | int netdev_kobject_init(void) |
1da177e4 | 1362 | { |
608b4b95 | 1363 | kobj_ns_type_register(&net_ns_type_operations); |
d6523ddf | 1364 | register_pernet_subsys(&kobj_net_ops); |
1da177e4 LT |
1365 | return class_register(&net_class); |
1366 | } |