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); | |
04ed3e74 | 102 | NETDEVICE_SHOW(features, fmt_hex); |
fd586bac | 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 | ||
a512b92b VD |
298 | NETDEVICE_SHOW(group, fmt_dec); |
299 | ||
300 | static int change_group(struct net_device *net, unsigned long new_group) | |
301 | { | |
302 | dev_set_group(net, (int) new_group); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | static ssize_t store_group(struct device *dev, struct device_attribute *attr, | |
307 | const char *buf, size_t len) | |
308 | { | |
309 | return netdev_store(dev, attr, buf, len, change_group); | |
310 | } | |
311 | ||
43cb76d9 | 312 | static struct device_attribute net_class_attributes[] = { |
c1f79426 | 313 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
fd586bac | 314 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 315 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 316 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
317 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
318 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
319 | __ATTR(features, S_IRUGO, show_features, NULL), | |
320 | __ATTR(type, S_IRUGO, show_type, NULL), | |
b00055aa | 321 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
322 | __ATTR(address, S_IRUGO, show_address, NULL), |
323 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
324 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
325 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
326 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
327 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
328 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
329 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
330 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
331 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
332 | store_tx_queue_len), | |
b6644cb7 | 333 | __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), |
fd586bac | 334 | {} |
1da177e4 LT |
335 | }; |
336 | ||
337 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
338 | static ssize_t netstat_show(const struct device *d, |
339 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
340 | unsigned long offset) |
341 | { | |
43cb76d9 | 342 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
343 | ssize_t ret = -EINVAL; |
344 | ||
be1f3c2c BH |
345 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
346 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
347 | |
348 | read_lock(&dev_base_lock); | |
96e74088 | 349 | if (dev_isalive(dev)) { |
28172739 ED |
350 | struct rtnl_link_stats64 temp; |
351 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
352 | ||
be1f3c2c | 353 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 354 | } |
1da177e4 LT |
355 | read_unlock(&dev_base_lock); |
356 | return ret; | |
357 | } | |
358 | ||
359 | /* generate a read-only statistics attribute */ | |
360 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
361 | static ssize_t show_##name(struct device *d, \ |
362 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 363 | { \ |
43cb76d9 | 364 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 365 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 366 | } \ |
43cb76d9 | 367 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
368 | |
369 | NETSTAT_ENTRY(rx_packets); | |
370 | NETSTAT_ENTRY(tx_packets); | |
371 | NETSTAT_ENTRY(rx_bytes); | |
372 | NETSTAT_ENTRY(tx_bytes); | |
373 | NETSTAT_ENTRY(rx_errors); | |
374 | NETSTAT_ENTRY(tx_errors); | |
375 | NETSTAT_ENTRY(rx_dropped); | |
376 | NETSTAT_ENTRY(tx_dropped); | |
377 | NETSTAT_ENTRY(multicast); | |
378 | NETSTAT_ENTRY(collisions); | |
379 | NETSTAT_ENTRY(rx_length_errors); | |
380 | NETSTAT_ENTRY(rx_over_errors); | |
381 | NETSTAT_ENTRY(rx_crc_errors); | |
382 | NETSTAT_ENTRY(rx_frame_errors); | |
383 | NETSTAT_ENTRY(rx_fifo_errors); | |
384 | NETSTAT_ENTRY(rx_missed_errors); | |
385 | NETSTAT_ENTRY(tx_aborted_errors); | |
386 | NETSTAT_ENTRY(tx_carrier_errors); | |
387 | NETSTAT_ENTRY(tx_fifo_errors); | |
388 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
389 | NETSTAT_ENTRY(tx_window_errors); | |
390 | NETSTAT_ENTRY(rx_compressed); | |
391 | NETSTAT_ENTRY(tx_compressed); | |
392 | ||
393 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
394 | &dev_attr_rx_packets.attr, |
395 | &dev_attr_tx_packets.attr, | |
396 | &dev_attr_rx_bytes.attr, | |
397 | &dev_attr_tx_bytes.attr, | |
398 | &dev_attr_rx_errors.attr, | |
399 | &dev_attr_tx_errors.attr, | |
400 | &dev_attr_rx_dropped.attr, | |
401 | &dev_attr_tx_dropped.attr, | |
402 | &dev_attr_multicast.attr, | |
403 | &dev_attr_collisions.attr, | |
404 | &dev_attr_rx_length_errors.attr, | |
405 | &dev_attr_rx_over_errors.attr, | |
406 | &dev_attr_rx_crc_errors.attr, | |
407 | &dev_attr_rx_frame_errors.attr, | |
408 | &dev_attr_rx_fifo_errors.attr, | |
409 | &dev_attr_rx_missed_errors.attr, | |
410 | &dev_attr_tx_aborted_errors.attr, | |
411 | &dev_attr_tx_carrier_errors.attr, | |
412 | &dev_attr_tx_fifo_errors.attr, | |
413 | &dev_attr_tx_heartbeat_errors.attr, | |
414 | &dev_attr_tx_window_errors.attr, | |
415 | &dev_attr_rx_compressed.attr, | |
416 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
417 | NULL |
418 | }; | |
419 | ||
420 | ||
421 | static struct attribute_group netstat_group = { | |
422 | .name = "statistics", | |
423 | .attrs = netstat_attrs, | |
424 | }; | |
425 | ||
22bb1be4 | 426 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 427 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 428 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
429 | ssize_t (*format)(const struct iw_statistics *, |
430 | char *)) | |
431 | { | |
43cb76d9 | 432 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 433 | const struct iw_statistics *iw; |
1da177e4 | 434 | ssize_t ret = -EINVAL; |
4ec93edb | 435 | |
b8afe641 EB |
436 | if (!rtnl_trylock()) |
437 | return restart_syscall(); | |
6dd214b5 | 438 | if (dev_isalive(dev)) { |
8f1546ca JB |
439 | iw = get_wireless_stats(dev); |
440 | if (iw) | |
6dd214b5 AB |
441 | ret = (*format)(iw, buf); |
442 | } | |
a160ee69 | 443 | rtnl_unlock(); |
1da177e4 LT |
444 | |
445 | return ret; | |
446 | } | |
447 | ||
448 | /* show function template for wireless fields */ | |
449 | #define WIRELESS_SHOW(name, field, format_string) \ | |
450 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
451 | { \ | |
452 | return sprintf(buf, format_string, iw->field); \ | |
453 | } \ | |
43cb76d9 GKH |
454 | static ssize_t show_iw_##name(struct device *d, \ |
455 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 456 | { \ |
43cb76d9 | 457 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 458 | } \ |
43cb76d9 | 459 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
460 | |
461 | WIRELESS_SHOW(status, status, fmt_hex); | |
462 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
463 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
464 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
465 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
466 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
467 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
468 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
469 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
470 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
471 | ||
472 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
473 | &dev_attr_status.attr, |
474 | &dev_attr_link.attr, | |
475 | &dev_attr_level.attr, | |
476 | &dev_attr_noise.attr, | |
477 | &dev_attr_nwid.attr, | |
478 | &dev_attr_crypt.attr, | |
479 | &dev_attr_fragment.attr, | |
480 | &dev_attr_retries.attr, | |
481 | &dev_attr_misc.attr, | |
482 | &dev_attr_beacon.attr, | |
1da177e4 LT |
483 | NULL |
484 | }; | |
485 | ||
486 | static struct attribute_group wireless_group = { | |
487 | .name = "wireless", | |
488 | .attrs = wireless_attrs, | |
489 | }; | |
490 | #endif | |
d6523ddf | 491 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 492 | |
30bde1f5 | 493 | #ifdef CONFIG_RPS |
0a9627f2 TH |
494 | /* |
495 | * RX queue sysfs structures and functions. | |
496 | */ | |
497 | struct rx_queue_attribute { | |
498 | struct attribute attr; | |
499 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
500 | struct rx_queue_attribute *attr, char *buf); | |
501 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
502 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
503 | }; | |
504 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
505 | struct rx_queue_attribute, attr) | |
506 | ||
507 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
508 | ||
509 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
510 | char *buf) | |
511 | { | |
512 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
513 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
514 | ||
515 | if (!attribute->show) | |
516 | return -EIO; | |
517 | ||
518 | return attribute->show(queue, attribute, buf); | |
519 | } | |
520 | ||
521 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
522 | const char *buf, size_t count) | |
523 | { | |
524 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
525 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
526 | ||
527 | if (!attribute->store) | |
528 | return -EIO; | |
529 | ||
530 | return attribute->store(queue, attribute, buf, count); | |
531 | } | |
532 | ||
fa50d645 | 533 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
534 | .show = rx_queue_attr_show, |
535 | .store = rx_queue_attr_store, | |
536 | }; | |
537 | ||
538 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
539 | struct rx_queue_attribute *attribute, char *buf) | |
540 | { | |
541 | struct rps_map *map; | |
542 | cpumask_var_t mask; | |
543 | size_t len = 0; | |
544 | int i; | |
545 | ||
546 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
547 | return -ENOMEM; | |
548 | ||
549 | rcu_read_lock(); | |
550 | map = rcu_dereference(queue->rps_map); | |
551 | if (map) | |
552 | for (i = 0; i < map->len; i++) | |
553 | cpumask_set_cpu(map->cpus[i], mask); | |
554 | ||
555 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
556 | if (PAGE_SIZE - len < 3) { | |
557 | rcu_read_unlock(); | |
558 | free_cpumask_var(mask); | |
559 | return -EINVAL; | |
560 | } | |
561 | rcu_read_unlock(); | |
562 | ||
563 | free_cpumask_var(mask); | |
564 | len += sprintf(buf + len, "\n"); | |
565 | return len; | |
566 | } | |
567 | ||
f5acb907 | 568 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
569 | struct rx_queue_attribute *attribute, |
570 | const char *buf, size_t len) | |
571 | { | |
572 | struct rps_map *old_map, *map; | |
573 | cpumask_var_t mask; | |
574 | int err, cpu, i; | |
575 | static DEFINE_SPINLOCK(rps_map_lock); | |
576 | ||
577 | if (!capable(CAP_NET_ADMIN)) | |
578 | return -EPERM; | |
579 | ||
580 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
581 | return -ENOMEM; | |
582 | ||
583 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
584 | if (err) { | |
585 | free_cpumask_var(mask); | |
586 | return err; | |
587 | } | |
588 | ||
589 | map = kzalloc(max_t(unsigned, | |
590 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
591 | GFP_KERNEL); | |
592 | if (!map) { | |
593 | free_cpumask_var(mask); | |
594 | return -ENOMEM; | |
595 | } | |
596 | ||
597 | i = 0; | |
598 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
599 | map->cpus[i++] = cpu; | |
600 | ||
601 | if (i) | |
602 | map->len = i; | |
603 | else { | |
604 | kfree(map); | |
605 | map = NULL; | |
606 | } | |
607 | ||
608 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
609 | old_map = rcu_dereference_protected(queue->rps_map, |
610 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
611 | rcu_assign_pointer(queue->rps_map, map); |
612 | spin_unlock(&rps_map_lock); | |
613 | ||
614 | if (old_map) | |
f6f80238 | 615 | kfree_rcu(old_map, rcu); |
0a9627f2 TH |
616 | |
617 | free_cpumask_var(mask); | |
618 | return len; | |
619 | } | |
620 | ||
fec5e652 TH |
621 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
622 | struct rx_queue_attribute *attr, | |
623 | char *buf) | |
624 | { | |
625 | struct rps_dev_flow_table *flow_table; | |
626 | unsigned int val = 0; | |
627 | ||
628 | rcu_read_lock(); | |
629 | flow_table = rcu_dereference(queue->rps_flow_table); | |
630 | if (flow_table) | |
631 | val = flow_table->mask + 1; | |
632 | rcu_read_unlock(); | |
633 | ||
634 | return sprintf(buf, "%u\n", val); | |
635 | } | |
636 | ||
637 | static void rps_dev_flow_table_release_work(struct work_struct *work) | |
638 | { | |
639 | struct rps_dev_flow_table *table = container_of(work, | |
640 | struct rps_dev_flow_table, free_work); | |
641 | ||
642 | vfree(table); | |
643 | } | |
644 | ||
645 | static void rps_dev_flow_table_release(struct rcu_head *rcu) | |
646 | { | |
647 | struct rps_dev_flow_table *table = container_of(rcu, | |
648 | struct rps_dev_flow_table, rcu); | |
649 | ||
650 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); | |
651 | schedule_work(&table->free_work); | |
652 | } | |
653 | ||
f5acb907 | 654 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
655 | struct rx_queue_attribute *attr, |
656 | const char *buf, size_t len) | |
657 | { | |
658 | unsigned int count; | |
659 | char *endp; | |
660 | struct rps_dev_flow_table *table, *old_table; | |
661 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
662 | ||
663 | if (!capable(CAP_NET_ADMIN)) | |
664 | return -EPERM; | |
665 | ||
666 | count = simple_strtoul(buf, &endp, 0); | |
667 | if (endp == buf) | |
668 | return -EINVAL; | |
669 | ||
670 | if (count) { | |
671 | int i; | |
672 | ||
673 | if (count > 1<<30) { | |
674 | /* Enforce a limit to prevent overflow */ | |
675 | return -EINVAL; | |
676 | } | |
677 | count = roundup_pow_of_two(count); | |
678 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count)); | |
679 | if (!table) | |
680 | return -ENOMEM; | |
681 | ||
682 | table->mask = count - 1; | |
683 | for (i = 0; i < count; i++) | |
684 | table->flows[i].cpu = RPS_NO_CPU; | |
685 | } else | |
686 | table = NULL; | |
687 | ||
688 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
689 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
690 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
691 | rcu_assign_pointer(queue->rps_flow_table, table); |
692 | spin_unlock(&rps_dev_flow_lock); | |
693 | ||
694 | if (old_table) | |
695 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
696 | ||
697 | return len; | |
698 | } | |
699 | ||
0a9627f2 TH |
700 | static struct rx_queue_attribute rps_cpus_attribute = |
701 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
702 | ||
fec5e652 TH |
703 | |
704 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
705 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
706 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
707 | ||
0a9627f2 TH |
708 | static struct attribute *rx_queue_default_attrs[] = { |
709 | &rps_cpus_attribute.attr, | |
fec5e652 | 710 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
711 | NULL |
712 | }; | |
713 | ||
714 | static void rx_queue_release(struct kobject *kobj) | |
715 | { | |
716 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
6e3f7faf ED |
717 | struct rps_map *map; |
718 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 719 | |
fec5e652 | 720 | |
6e3f7faf | 721 | map = rcu_dereference_raw(queue->rps_map); |
9ea19481 JF |
722 | if (map) { |
723 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 724 | kfree_rcu(map, rcu); |
9ea19481 | 725 | } |
6e3f7faf ED |
726 | |
727 | flow_table = rcu_dereference_raw(queue->rps_flow_table); | |
9ea19481 JF |
728 | if (flow_table) { |
729 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 730 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 731 | } |
0a9627f2 | 732 | |
9ea19481 | 733 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 734 | dev_put(queue->dev); |
0a9627f2 TH |
735 | } |
736 | ||
737 | static struct kobj_type rx_queue_ktype = { | |
738 | .sysfs_ops = &rx_queue_sysfs_ops, | |
739 | .release = rx_queue_release, | |
740 | .default_attrs = rx_queue_default_attrs, | |
741 | }; | |
742 | ||
743 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
744 | { | |
745 | struct netdev_rx_queue *queue = net->_rx + index; | |
746 | struct kobject *kobj = &queue->kobj; | |
747 | int error = 0; | |
748 | ||
749 | kobj->kset = net->queues_kset; | |
750 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
751 | "rx-%u", index); | |
752 | if (error) { | |
753 | kobject_put(kobj); | |
754 | return error; | |
755 | } | |
756 | ||
757 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 758 | dev_hold(queue->dev); |
0a9627f2 TH |
759 | |
760 | return error; | |
761 | } | |
bf264145 | 762 | #endif /* CONFIG_RPS */ |
0a9627f2 | 763 | |
62fe0b40 BH |
764 | int |
765 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 766 | { |
bf264145 | 767 | #ifdef CONFIG_RPS |
0a9627f2 TH |
768 | int i; |
769 | int error = 0; | |
770 | ||
62fe0b40 | 771 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 772 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
773 | if (error) { |
774 | new_num = old_num; | |
0a9627f2 | 775 | break; |
62fe0b40 | 776 | } |
0a9627f2 TH |
777 | } |
778 | ||
62fe0b40 BH |
779 | while (--i >= new_num) |
780 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
781 | |
782 | return error; | |
bf264145 TH |
783 | #else |
784 | return 0; | |
785 | #endif | |
0a9627f2 TH |
786 | } |
787 | ||
bf264145 | 788 | #ifdef CONFIG_XPS |
1d24eb48 TH |
789 | /* |
790 | * netdev_queue sysfs structures and functions. | |
791 | */ | |
792 | struct netdev_queue_attribute { | |
793 | struct attribute attr; | |
794 | ssize_t (*show)(struct netdev_queue *queue, | |
795 | struct netdev_queue_attribute *attr, char *buf); | |
796 | ssize_t (*store)(struct netdev_queue *queue, | |
797 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
798 | }; | |
799 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
800 | struct netdev_queue_attribute, attr) | |
801 | ||
802 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
803 | ||
804 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
805 | struct attribute *attr, char *buf) | |
806 | { | |
807 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
808 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
809 | ||
810 | if (!attribute->show) | |
811 | return -EIO; | |
812 | ||
813 | return attribute->show(queue, attribute, buf); | |
814 | } | |
815 | ||
816 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
817 | struct attribute *attr, | |
818 | const char *buf, size_t count) | |
819 | { | |
820 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
821 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
822 | ||
823 | if (!attribute->store) | |
824 | return -EIO; | |
825 | ||
826 | return attribute->store(queue, attribute, buf, count); | |
827 | } | |
828 | ||
829 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
830 | .show = netdev_queue_attr_show, | |
831 | .store = netdev_queue_attr_store, | |
832 | }; | |
833 | ||
834 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) | |
0a9627f2 | 835 | { |
1d24eb48 TH |
836 | struct net_device *dev = queue->dev; |
837 | int i; | |
838 | ||
839 | for (i = 0; i < dev->num_tx_queues; i++) | |
840 | if (queue == &dev->_tx[i]) | |
841 | break; | |
842 | ||
843 | BUG_ON(i >= dev->num_tx_queues); | |
844 | ||
845 | return i; | |
846 | } | |
847 | ||
848 | ||
849 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
850 | struct netdev_queue_attribute *attribute, char *buf) | |
851 | { | |
852 | struct net_device *dev = queue->dev; | |
853 | struct xps_dev_maps *dev_maps; | |
854 | cpumask_var_t mask; | |
855 | unsigned long index; | |
856 | size_t len = 0; | |
857 | int i; | |
858 | ||
859 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
860 | return -ENOMEM; | |
861 | ||
862 | index = get_netdev_queue_index(queue); | |
863 | ||
864 | rcu_read_lock(); | |
865 | dev_maps = rcu_dereference(dev->xps_maps); | |
866 | if (dev_maps) { | |
867 | for_each_possible_cpu(i) { | |
868 | struct xps_map *map = | |
869 | rcu_dereference(dev_maps->cpu_map[i]); | |
870 | if (map) { | |
871 | int j; | |
872 | for (j = 0; j < map->len; j++) { | |
873 | if (map->queues[j] == index) { | |
874 | cpumask_set_cpu(i, mask); | |
875 | break; | |
876 | } | |
877 | } | |
878 | } | |
879 | } | |
880 | } | |
881 | rcu_read_unlock(); | |
882 | ||
883 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
884 | if (PAGE_SIZE - len < 3) { | |
885 | free_cpumask_var(mask); | |
886 | return -EINVAL; | |
887 | } | |
888 | ||
889 | free_cpumask_var(mask); | |
890 | len += sprintf(buf + len, "\n"); | |
891 | return len; | |
892 | } | |
893 | ||
1d24eb48 TH |
894 | static void xps_dev_maps_release(struct rcu_head *rcu) |
895 | { | |
896 | struct xps_dev_maps *dev_maps = | |
897 | container_of(rcu, struct xps_dev_maps, rcu); | |
898 | ||
899 | kfree(dev_maps); | |
900 | } | |
901 | ||
902 | static DEFINE_MUTEX(xps_map_mutex); | |
a4177869 ED |
903 | #define xmap_dereference(P) \ |
904 | rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex)) | |
1d24eb48 TH |
905 | |
906 | static ssize_t store_xps_map(struct netdev_queue *queue, | |
907 | struct netdev_queue_attribute *attribute, | |
908 | const char *buf, size_t len) | |
909 | { | |
910 | struct net_device *dev = queue->dev; | |
911 | cpumask_var_t mask; | |
912 | int err, i, cpu, pos, map_len, alloc_len, need_set; | |
913 | unsigned long index; | |
914 | struct xps_map *map, *new_map; | |
915 | struct xps_dev_maps *dev_maps, *new_dev_maps; | |
916 | int nonempty = 0; | |
f2cd2d3e | 917 | int numa_node = -2; |
1d24eb48 TH |
918 | |
919 | if (!capable(CAP_NET_ADMIN)) | |
920 | return -EPERM; | |
921 | ||
922 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
923 | return -ENOMEM; | |
924 | ||
925 | index = get_netdev_queue_index(queue); | |
926 | ||
927 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
928 | if (err) { | |
929 | free_cpumask_var(mask); | |
930 | return err; | |
931 | } | |
932 | ||
933 | new_dev_maps = kzalloc(max_t(unsigned, | |
934 | XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL); | |
935 | if (!new_dev_maps) { | |
936 | free_cpumask_var(mask); | |
937 | return -ENOMEM; | |
938 | } | |
939 | ||
940 | mutex_lock(&xps_map_mutex); | |
941 | ||
a4177869 | 942 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
943 | |
944 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
945 | map = dev_maps ? |
946 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
947 | new_map = map; | |
1d24eb48 TH |
948 | if (map) { |
949 | for (pos = 0; pos < map->len; pos++) | |
950 | if (map->queues[pos] == index) | |
951 | break; | |
952 | map_len = map->len; | |
953 | alloc_len = map->alloc_len; | |
954 | } else | |
955 | pos = map_len = alloc_len = 0; | |
956 | ||
957 | need_set = cpu_isset(cpu, *mask) && cpu_online(cpu); | |
f2cd2d3e ED |
958 | #ifdef CONFIG_NUMA |
959 | if (need_set) { | |
960 | if (numa_node == -2) | |
961 | numa_node = cpu_to_node(cpu); | |
962 | else if (numa_node != cpu_to_node(cpu)) | |
963 | numa_node = -1; | |
964 | } | |
965 | #endif | |
1d24eb48 TH |
966 | if (need_set && pos >= map_len) { |
967 | /* Need to add queue to this CPU's map */ | |
968 | if (map_len >= alloc_len) { | |
969 | alloc_len = alloc_len ? | |
970 | 2 * alloc_len : XPS_MIN_MAP_ALLOC; | |
b02038a1 ED |
971 | new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len), |
972 | GFP_KERNEL, | |
973 | cpu_to_node(cpu)); | |
1d24eb48 TH |
974 | if (!new_map) |
975 | goto error; | |
976 | new_map->alloc_len = alloc_len; | |
977 | for (i = 0; i < map_len; i++) | |
978 | new_map->queues[i] = map->queues[i]; | |
979 | new_map->len = map_len; | |
980 | } | |
981 | new_map->queues[new_map->len++] = index; | |
982 | } else if (!need_set && pos < map_len) { | |
983 | /* Need to remove queue from this CPU's map */ | |
984 | if (map_len > 1) | |
985 | new_map->queues[pos] = | |
986 | new_map->queues[--new_map->len]; | |
987 | else | |
988 | new_map = NULL; | |
989 | } | |
a4177869 | 990 | RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map); |
1d24eb48 TH |
991 | } |
992 | ||
993 | /* Cleanup old maps */ | |
994 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
995 | map = dev_maps ? |
996 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
997 | if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map) | |
edc86d8a | 998 | kfree_rcu(map, rcu); |
1d24eb48 TH |
999 | if (new_dev_maps->cpu_map[cpu]) |
1000 | nonempty = 1; | |
1001 | } | |
1002 | ||
1003 | if (nonempty) | |
1004 | rcu_assign_pointer(dev->xps_maps, new_dev_maps); | |
1005 | else { | |
1006 | kfree(new_dev_maps); | |
1007 | rcu_assign_pointer(dev->xps_maps, NULL); | |
1008 | } | |
1009 | ||
1010 | if (dev_maps) | |
1011 | call_rcu(&dev_maps->rcu, xps_dev_maps_release); | |
1012 | ||
b236da69 CG |
1013 | netdev_queue_numa_node_write(queue, (numa_node >= 0) ? numa_node : |
1014 | NUMA_NO_NODE); | |
f2cd2d3e | 1015 | |
1d24eb48 TH |
1016 | mutex_unlock(&xps_map_mutex); |
1017 | ||
1018 | free_cpumask_var(mask); | |
1019 | return len; | |
1020 | ||
1021 | error: | |
1022 | mutex_unlock(&xps_map_mutex); | |
1023 | ||
1024 | if (new_dev_maps) | |
1025 | for_each_possible_cpu(i) | |
a4177869 ED |
1026 | kfree(rcu_dereference_protected( |
1027 | new_dev_maps->cpu_map[i], | |
1028 | 1)); | |
1d24eb48 TH |
1029 | kfree(new_dev_maps); |
1030 | free_cpumask_var(mask); | |
1031 | return -ENOMEM; | |
1032 | } | |
1033 | ||
1034 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1035 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
1036 | ||
1037 | static struct attribute *netdev_queue_default_attrs[] = { | |
1038 | &xps_cpus_attribute.attr, | |
1039 | NULL | |
1040 | }; | |
1041 | ||
1042 | static void netdev_queue_release(struct kobject *kobj) | |
1043 | { | |
1044 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1045 | struct net_device *dev = queue->dev; | |
1046 | struct xps_dev_maps *dev_maps; | |
1047 | struct xps_map *map; | |
1048 | unsigned long index; | |
1049 | int i, pos, nonempty = 0; | |
1050 | ||
1051 | index = get_netdev_queue_index(queue); | |
1052 | ||
1053 | mutex_lock(&xps_map_mutex); | |
a4177869 | 1054 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
1055 | |
1056 | if (dev_maps) { | |
1057 | for_each_possible_cpu(i) { | |
a4177869 | 1058 | map = xmap_dereference(dev_maps->cpu_map[i]); |
1d24eb48 TH |
1059 | if (!map) |
1060 | continue; | |
1061 | ||
1062 | for (pos = 0; pos < map->len; pos++) | |
1063 | if (map->queues[pos] == index) | |
1064 | break; | |
1065 | ||
1066 | if (pos < map->len) { | |
1067 | if (map->len > 1) | |
1068 | map->queues[pos] = | |
1069 | map->queues[--map->len]; | |
1070 | else { | |
1071 | RCU_INIT_POINTER(dev_maps->cpu_map[i], | |
1072 | NULL); | |
edc86d8a | 1073 | kfree_rcu(map, rcu); |
1d24eb48 TH |
1074 | map = NULL; |
1075 | } | |
1076 | } | |
1077 | if (map) | |
1078 | nonempty = 1; | |
1079 | } | |
1080 | ||
1081 | if (!nonempty) { | |
1082 | RCU_INIT_POINTER(dev->xps_maps, NULL); | |
1083 | call_rcu(&dev_maps->rcu, xps_dev_maps_release); | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | mutex_unlock(&xps_map_mutex); | |
1088 | ||
1089 | memset(kobj, 0, sizeof(*kobj)); | |
1090 | dev_put(queue->dev); | |
1091 | } | |
1092 | ||
1093 | static struct kobj_type netdev_queue_ktype = { | |
1094 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1095 | .release = netdev_queue_release, | |
1096 | .default_attrs = netdev_queue_default_attrs, | |
1097 | }; | |
1098 | ||
1099 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1100 | { | |
1101 | struct netdev_queue *queue = net->_tx + index; | |
1102 | struct kobject *kobj = &queue->kobj; | |
1103 | int error = 0; | |
1104 | ||
1105 | kobj->kset = net->queues_kset; | |
1106 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1107 | "tx-%u", index); | |
1108 | if (error) { | |
1109 | kobject_put(kobj); | |
1110 | return error; | |
1111 | } | |
1112 | ||
1113 | kobject_uevent(kobj, KOBJ_ADD); | |
1114 | dev_hold(queue->dev); | |
1115 | ||
1116 | return error; | |
1117 | } | |
bf264145 | 1118 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1119 | |
1120 | int | |
1121 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1122 | { | |
bf264145 | 1123 | #ifdef CONFIG_XPS |
1d24eb48 TH |
1124 | int i; |
1125 | int error = 0; | |
1126 | ||
1127 | for (i = old_num; i < new_num; i++) { | |
1128 | error = netdev_queue_add_kobject(net, i); | |
1129 | if (error) { | |
1130 | new_num = old_num; | |
1131 | break; | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | while (--i >= new_num) | |
1136 | kobject_put(&net->_tx[i].kobj); | |
1137 | ||
1138 | return error; | |
bf264145 TH |
1139 | #else |
1140 | return 0; | |
1141 | #endif | |
1d24eb48 TH |
1142 | } |
1143 | ||
1144 | static int register_queue_kobjects(struct net_device *net) | |
1145 | { | |
bf264145 | 1146 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1147 | |
bf264145 | 1148 | #if defined(CONFIG_RPS) || defined(CONFIG_XPS) |
62fe0b40 BH |
1149 | net->queues_kset = kset_create_and_add("queues", |
1150 | NULL, &net->dev.kobj); | |
1151 | if (!net->queues_kset) | |
1152 | return -ENOMEM; | |
bf264145 TH |
1153 | #endif |
1154 | ||
1155 | #ifdef CONFIG_RPS | |
1156 | real_rx = net->real_num_rx_queues; | |
1157 | #endif | |
1158 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1159 | |
bf264145 | 1160 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1161 | if (error) |
1162 | goto error; | |
bf264145 | 1163 | rxq = real_rx; |
1d24eb48 | 1164 | |
bf264145 | 1165 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1166 | if (error) |
1167 | goto error; | |
bf264145 | 1168 | txq = real_tx; |
1d24eb48 TH |
1169 | |
1170 | return 0; | |
1171 | ||
1172 | error: | |
1173 | netdev_queue_update_kobjects(net, txq, 0); | |
1174 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1175 | return error; | |
62fe0b40 | 1176 | } |
0a9627f2 | 1177 | |
1d24eb48 | 1178 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1179 | { |
bf264145 TH |
1180 | int real_rx = 0, real_tx = 0; |
1181 | ||
1182 | #ifdef CONFIG_RPS | |
1183 | real_rx = net->real_num_rx_queues; | |
1184 | #endif | |
1185 | real_tx = net->real_num_tx_queues; | |
1186 | ||
1187 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1188 | netdev_queue_update_kobjects(net, real_tx, 0); | |
1189 | #if defined(CONFIG_RPS) || defined(CONFIG_XPS) | |
0a9627f2 | 1190 | kset_unregister(net->queues_kset); |
bf264145 | 1191 | #endif |
0a9627f2 | 1192 | } |
608b4b95 EB |
1193 | |
1194 | static const void *net_current_ns(void) | |
1195 | { | |
1196 | return current->nsproxy->net_ns; | |
1197 | } | |
1198 | ||
1199 | static const void *net_initial_ns(void) | |
1200 | { | |
1201 | return &init_net; | |
1202 | } | |
1203 | ||
1204 | static const void *net_netlink_ns(struct sock *sk) | |
1205 | { | |
1206 | return sock_net(sk); | |
1207 | } | |
1208 | ||
04600794 | 1209 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 EB |
1210 | .type = KOBJ_NS_TYPE_NET, |
1211 | .current_ns = net_current_ns, | |
1212 | .netlink_ns = net_netlink_ns, | |
1213 | .initial_ns = net_initial_ns, | |
1214 | }; | |
04600794 | 1215 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 EB |
1216 | |
1217 | static void net_kobj_ns_exit(struct net *net) | |
1218 | { | |
1219 | kobj_ns_exit(KOBJ_NS_TYPE_NET, net); | |
1220 | } | |
1221 | ||
d6523ddf | 1222 | static struct pernet_operations kobj_net_ops = { |
608b4b95 EB |
1223 | .exit = net_kobj_ns_exit, |
1224 | }; | |
1225 | ||
8b41d188 | 1226 | |
1da177e4 | 1227 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 1228 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1229 | { |
43cb76d9 | 1230 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1231 | int retval; |
1da177e4 | 1232 | |
312c004d | 1233 | /* pass interface to uevent. */ |
7eff2e7a | 1234 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1235 | if (retval) |
1236 | goto exit; | |
ca2f37db JT |
1237 | |
1238 | /* pass ifindex to uevent. | |
1239 | * ifindex is useful as it won't change (interface name may change) | |
1240 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1241 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1242 | |
bf62456e | 1243 | exit: |
bf62456e | 1244 | return retval; |
1da177e4 LT |
1245 | } |
1246 | #endif | |
1247 | ||
1248 | /* | |
4ec93edb | 1249 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1250 | * Called when last reference to device kobject is gone. |
1da177e4 | 1251 | */ |
43cb76d9 | 1252 | static void netdev_release(struct device *d) |
1da177e4 | 1253 | { |
43cb76d9 | 1254 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1255 | |
1256 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1257 | ||
0b815a1a | 1258 | kfree(dev->ifalias); |
1da177e4 LT |
1259 | kfree((char *)dev - dev->padded); |
1260 | } | |
1261 | ||
608b4b95 EB |
1262 | static const void *net_namespace(struct device *d) |
1263 | { | |
1264 | struct net_device *dev; | |
1265 | dev = container_of(d, struct net_device, dev); | |
1266 | return dev_net(dev); | |
1267 | } | |
1268 | ||
1da177e4 LT |
1269 | static struct class net_class = { |
1270 | .name = "net", | |
43cb76d9 | 1271 | .dev_release = netdev_release, |
8b41d188 | 1272 | #ifdef CONFIG_SYSFS |
43cb76d9 | 1273 | .dev_attrs = net_class_attributes, |
8b41d188 | 1274 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1275 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 1276 | .dev_uevent = netdev_uevent, |
1da177e4 | 1277 | #endif |
608b4b95 EB |
1278 | .ns_type = &net_ns_type_operations, |
1279 | .namespace = net_namespace, | |
1da177e4 LT |
1280 | }; |
1281 | ||
9093bbb2 SH |
1282 | /* Delete sysfs entries but hold kobject reference until after all |
1283 | * netdev references are gone. | |
1284 | */ | |
8b41d188 | 1285 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1286 | { |
9093bbb2 SH |
1287 | struct device *dev = &(net->dev); |
1288 | ||
1289 | kobject_get(&dev->kobj); | |
3891845e | 1290 | |
1d24eb48 | 1291 | remove_queue_kobjects(net); |
0a9627f2 | 1292 | |
9093bbb2 | 1293 | device_del(dev); |
1da177e4 LT |
1294 | } |
1295 | ||
1296 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1297 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1298 | { |
43cb76d9 | 1299 | struct device *dev = &(net->dev); |
a4dbd674 | 1300 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1301 | int error = 0; |
1da177e4 | 1302 | |
a1b3f594 | 1303 | device_initialize(dev); |
43cb76d9 GKH |
1304 | dev->class = &net_class; |
1305 | dev->platform_data = net; | |
1306 | dev->groups = groups; | |
1da177e4 | 1307 | |
a2205472 | 1308 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1309 | |
8b41d188 | 1310 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1311 | /* Allow for a device specific group */ |
1312 | if (*groups) | |
1313 | groups++; | |
1da177e4 | 1314 | |
0c509a6c | 1315 | *groups++ = &netstat_group; |
22bb1be4 | 1316 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 1317 | if (net->ieee80211_ptr) |
fe9925b5 | 1318 | *groups++ = &wireless_group; |
3d23e349 JB |
1319 | #ifdef CONFIG_WIRELESS_EXT |
1320 | else if (net->wireless_handlers) | |
1321 | *groups++ = &wireless_group; | |
1322 | #endif | |
1da177e4 | 1323 | #endif |
8b41d188 | 1324 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1325 | |
0a9627f2 TH |
1326 | error = device_add(dev); |
1327 | if (error) | |
1328 | return error; | |
1329 | ||
1d24eb48 | 1330 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1331 | if (error) { |
1332 | device_del(dev); | |
1333 | return error; | |
1334 | } | |
1335 | ||
1336 | return error; | |
1da177e4 LT |
1337 | } |
1338 | ||
b8a9787e JV |
1339 | int netdev_class_create_file(struct class_attribute *class_attr) |
1340 | { | |
1341 | return class_create_file(&net_class, class_attr); | |
1342 | } | |
9e34a5b5 | 1343 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
1344 | |
1345 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
1346 | { | |
1347 | class_remove_file(&net_class, class_attr); | |
1348 | } | |
b8a9787e JV |
1349 | EXPORT_SYMBOL(netdev_class_remove_file); |
1350 | ||
8b41d188 | 1351 | int netdev_kobject_init(void) |
1da177e4 | 1352 | { |
608b4b95 | 1353 | kobj_ns_type_register(&net_ns_type_operations); |
d6523ddf | 1354 | register_pernet_subsys(&kobj_net_ops); |
1da177e4 LT |
1355 | return class_register(&net_class); |
1356 | } |