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> |
bc3b2d7f | 23 | #include <linux/export.h> |
8f1546ca | 24 | #include <net/wext.h> |
1da177e4 | 25 | |
342709ef PE |
26 | #include "net-sysfs.h" |
27 | ||
8b41d188 | 28 | #ifdef CONFIG_SYSFS |
1da177e4 | 29 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 30 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 | 31 | static const char fmt_dec[] = "%d\n"; |
8ae6daca | 32 | static const char fmt_udec[] = "%u\n"; |
1da177e4 | 33 | static const char fmt_ulong[] = "%lu\n"; |
be1f3c2c | 34 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 35 | |
4ec93edb | 36 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 37 | { |
fe9925b5 | 38 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
39 | } |
40 | ||
41 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
42 | static ssize_t netdev_show(const struct device *dev, |
43 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
44 | ssize_t (*format)(const struct net_device *, char *)) |
45 | { | |
43cb76d9 | 46 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
47 | ssize_t ret = -EINVAL; |
48 | ||
49 | read_lock(&dev_base_lock); | |
50 | if (dev_isalive(net)) | |
51 | ret = (*format)(net, buf); | |
52 | read_unlock(&dev_base_lock); | |
53 | ||
54 | return ret; | |
55 | } | |
56 | ||
57 | /* generate a show function for simple field */ | |
58 | #define NETDEVICE_SHOW(field, format_string) \ | |
59 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
60 | { \ | |
61 | return sprintf(buf, format_string, net->field); \ | |
62 | } \ | |
43cb76d9 GKH |
63 | static ssize_t show_##field(struct device *dev, \ |
64 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 65 | { \ |
43cb76d9 | 66 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
67 | } |
68 | ||
69 | ||
70 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 71 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
72 | const char *buf, size_t len, |
73 | int (*set)(struct net_device *, unsigned long)) | |
74 | { | |
75 | struct net_device *net = to_net_dev(dev); | |
76 | char *endp; | |
77 | unsigned long new; | |
78 | int ret = -EINVAL; | |
79 | ||
80 | if (!capable(CAP_NET_ADMIN)) | |
81 | return -EPERM; | |
82 | ||
83 | new = simple_strtoul(buf, &endp, 0); | |
84 | if (endp == buf) | |
85 | goto err; | |
86 | ||
5a5990d3 | 87 | if (!rtnl_trylock()) |
336ca57c | 88 | return restart_syscall(); |
5a5990d3 | 89 | |
1da177e4 LT |
90 | if (dev_isalive(net)) { |
91 | if ((ret = (*set)(net, new)) == 0) | |
92 | ret = len; | |
93 | } | |
94 | rtnl_unlock(); | |
95 | err: | |
96 | return ret; | |
97 | } | |
98 | ||
9d29672c | 99 | NETDEVICE_SHOW(dev_id, fmt_hex); |
c1f79426 | 100 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
fd586bac KS |
101 | NETDEVICE_SHOW(addr_len, fmt_dec); |
102 | NETDEVICE_SHOW(iflink, fmt_dec); | |
103 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
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; | |
4bc71cb9 | 151 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca | 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; | |
4bc71cb9 | 169 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca DD |
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), | |
fd586bac | 315 | __ATTR(type, S_IRUGO, show_type, NULL), |
b00055aa | 316 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
317 | __ATTR(address, S_IRUGO, show_address, NULL), |
318 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
319 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
320 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
321 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
322 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
323 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
324 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
325 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
326 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
327 | store_tx_queue_len), | |
b6644cb7 | 328 | __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), |
fd586bac | 329 | {} |
1da177e4 LT |
330 | }; |
331 | ||
332 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
333 | static ssize_t netstat_show(const struct device *d, |
334 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
335 | unsigned long offset) |
336 | { | |
43cb76d9 | 337 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
338 | ssize_t ret = -EINVAL; |
339 | ||
be1f3c2c BH |
340 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
341 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
342 | |
343 | read_lock(&dev_base_lock); | |
96e74088 | 344 | if (dev_isalive(dev)) { |
28172739 ED |
345 | struct rtnl_link_stats64 temp; |
346 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
347 | ||
be1f3c2c | 348 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 349 | } |
1da177e4 LT |
350 | read_unlock(&dev_base_lock); |
351 | return ret; | |
352 | } | |
353 | ||
354 | /* generate a read-only statistics attribute */ | |
355 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
356 | static ssize_t show_##name(struct device *d, \ |
357 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 358 | { \ |
43cb76d9 | 359 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 360 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 361 | } \ |
43cb76d9 | 362 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
363 | |
364 | NETSTAT_ENTRY(rx_packets); | |
365 | NETSTAT_ENTRY(tx_packets); | |
366 | NETSTAT_ENTRY(rx_bytes); | |
367 | NETSTAT_ENTRY(tx_bytes); | |
368 | NETSTAT_ENTRY(rx_errors); | |
369 | NETSTAT_ENTRY(tx_errors); | |
370 | NETSTAT_ENTRY(rx_dropped); | |
371 | NETSTAT_ENTRY(tx_dropped); | |
372 | NETSTAT_ENTRY(multicast); | |
373 | NETSTAT_ENTRY(collisions); | |
374 | NETSTAT_ENTRY(rx_length_errors); | |
375 | NETSTAT_ENTRY(rx_over_errors); | |
376 | NETSTAT_ENTRY(rx_crc_errors); | |
377 | NETSTAT_ENTRY(rx_frame_errors); | |
378 | NETSTAT_ENTRY(rx_fifo_errors); | |
379 | NETSTAT_ENTRY(rx_missed_errors); | |
380 | NETSTAT_ENTRY(tx_aborted_errors); | |
381 | NETSTAT_ENTRY(tx_carrier_errors); | |
382 | NETSTAT_ENTRY(tx_fifo_errors); | |
383 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
384 | NETSTAT_ENTRY(tx_window_errors); | |
385 | NETSTAT_ENTRY(rx_compressed); | |
386 | NETSTAT_ENTRY(tx_compressed); | |
387 | ||
388 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
389 | &dev_attr_rx_packets.attr, |
390 | &dev_attr_tx_packets.attr, | |
391 | &dev_attr_rx_bytes.attr, | |
392 | &dev_attr_tx_bytes.attr, | |
393 | &dev_attr_rx_errors.attr, | |
394 | &dev_attr_tx_errors.attr, | |
395 | &dev_attr_rx_dropped.attr, | |
396 | &dev_attr_tx_dropped.attr, | |
397 | &dev_attr_multicast.attr, | |
398 | &dev_attr_collisions.attr, | |
399 | &dev_attr_rx_length_errors.attr, | |
400 | &dev_attr_rx_over_errors.attr, | |
401 | &dev_attr_rx_crc_errors.attr, | |
402 | &dev_attr_rx_frame_errors.attr, | |
403 | &dev_attr_rx_fifo_errors.attr, | |
404 | &dev_attr_rx_missed_errors.attr, | |
405 | &dev_attr_tx_aborted_errors.attr, | |
406 | &dev_attr_tx_carrier_errors.attr, | |
407 | &dev_attr_tx_fifo_errors.attr, | |
408 | &dev_attr_tx_heartbeat_errors.attr, | |
409 | &dev_attr_tx_window_errors.attr, | |
410 | &dev_attr_rx_compressed.attr, | |
411 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
412 | NULL |
413 | }; | |
414 | ||
415 | ||
416 | static struct attribute_group netstat_group = { | |
417 | .name = "statistics", | |
418 | .attrs = netstat_attrs, | |
419 | }; | |
420 | ||
22bb1be4 | 421 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 422 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 423 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
424 | ssize_t (*format)(const struct iw_statistics *, |
425 | char *)) | |
426 | { | |
43cb76d9 | 427 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 428 | const struct iw_statistics *iw; |
1da177e4 | 429 | ssize_t ret = -EINVAL; |
4ec93edb | 430 | |
b8afe641 EB |
431 | if (!rtnl_trylock()) |
432 | return restart_syscall(); | |
6dd214b5 | 433 | if (dev_isalive(dev)) { |
8f1546ca JB |
434 | iw = get_wireless_stats(dev); |
435 | if (iw) | |
6dd214b5 AB |
436 | ret = (*format)(iw, buf); |
437 | } | |
a160ee69 | 438 | rtnl_unlock(); |
1da177e4 LT |
439 | |
440 | return ret; | |
441 | } | |
442 | ||
443 | /* show function template for wireless fields */ | |
444 | #define WIRELESS_SHOW(name, field, format_string) \ | |
445 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
446 | { \ | |
447 | return sprintf(buf, format_string, iw->field); \ | |
448 | } \ | |
43cb76d9 GKH |
449 | static ssize_t show_iw_##name(struct device *d, \ |
450 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 451 | { \ |
43cb76d9 | 452 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 453 | } \ |
43cb76d9 | 454 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
455 | |
456 | WIRELESS_SHOW(status, status, fmt_hex); | |
457 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
458 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
459 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
460 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
461 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
462 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
463 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
464 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
465 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
466 | ||
467 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
468 | &dev_attr_status.attr, |
469 | &dev_attr_link.attr, | |
470 | &dev_attr_level.attr, | |
471 | &dev_attr_noise.attr, | |
472 | &dev_attr_nwid.attr, | |
473 | &dev_attr_crypt.attr, | |
474 | &dev_attr_fragment.attr, | |
475 | &dev_attr_retries.attr, | |
476 | &dev_attr_misc.attr, | |
477 | &dev_attr_beacon.attr, | |
1da177e4 LT |
478 | NULL |
479 | }; | |
480 | ||
481 | static struct attribute_group wireless_group = { | |
482 | .name = "wireless", | |
483 | .attrs = wireless_attrs, | |
484 | }; | |
485 | #endif | |
d6523ddf | 486 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 487 | |
30bde1f5 | 488 | #ifdef CONFIG_RPS |
0a9627f2 TH |
489 | /* |
490 | * RX queue sysfs structures and functions. | |
491 | */ | |
492 | struct rx_queue_attribute { | |
493 | struct attribute attr; | |
494 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
495 | struct rx_queue_attribute *attr, char *buf); | |
496 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
497 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
498 | }; | |
499 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
500 | struct rx_queue_attribute, attr) | |
501 | ||
502 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
503 | ||
504 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
505 | char *buf) | |
506 | { | |
507 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
508 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
509 | ||
510 | if (!attribute->show) | |
511 | return -EIO; | |
512 | ||
513 | return attribute->show(queue, attribute, buf); | |
514 | } | |
515 | ||
516 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
517 | const char *buf, size_t count) | |
518 | { | |
519 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
520 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
521 | ||
522 | if (!attribute->store) | |
523 | return -EIO; | |
524 | ||
525 | return attribute->store(queue, attribute, buf, count); | |
526 | } | |
527 | ||
fa50d645 | 528 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
529 | .show = rx_queue_attr_show, |
530 | .store = rx_queue_attr_store, | |
531 | }; | |
532 | ||
533 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
534 | struct rx_queue_attribute *attribute, char *buf) | |
535 | { | |
536 | struct rps_map *map; | |
537 | cpumask_var_t mask; | |
538 | size_t len = 0; | |
539 | int i; | |
540 | ||
541 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
542 | return -ENOMEM; | |
543 | ||
544 | rcu_read_lock(); | |
545 | map = rcu_dereference(queue->rps_map); | |
546 | if (map) | |
547 | for (i = 0; i < map->len; i++) | |
548 | cpumask_set_cpu(map->cpus[i], mask); | |
549 | ||
550 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
551 | if (PAGE_SIZE - len < 3) { | |
552 | rcu_read_unlock(); | |
553 | free_cpumask_var(mask); | |
554 | return -EINVAL; | |
555 | } | |
556 | rcu_read_unlock(); | |
557 | ||
558 | free_cpumask_var(mask); | |
559 | len += sprintf(buf + len, "\n"); | |
560 | return len; | |
561 | } | |
562 | ||
f5acb907 | 563 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
564 | struct rx_queue_attribute *attribute, |
565 | const char *buf, size_t len) | |
566 | { | |
567 | struct rps_map *old_map, *map; | |
568 | cpumask_var_t mask; | |
569 | int err, cpu, i; | |
570 | static DEFINE_SPINLOCK(rps_map_lock); | |
571 | ||
572 | if (!capable(CAP_NET_ADMIN)) | |
573 | return -EPERM; | |
574 | ||
575 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
576 | return -ENOMEM; | |
577 | ||
578 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
579 | if (err) { | |
580 | free_cpumask_var(mask); | |
581 | return err; | |
582 | } | |
583 | ||
584 | map = kzalloc(max_t(unsigned, | |
585 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
586 | GFP_KERNEL); | |
587 | if (!map) { | |
588 | free_cpumask_var(mask); | |
589 | return -ENOMEM; | |
590 | } | |
591 | ||
592 | i = 0; | |
593 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
594 | map->cpus[i++] = cpu; | |
595 | ||
596 | if (i) | |
597 | map->len = i; | |
598 | else { | |
599 | kfree(map); | |
600 | map = NULL; | |
601 | } | |
602 | ||
603 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
604 | old_map = rcu_dereference_protected(queue->rps_map, |
605 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
606 | rcu_assign_pointer(queue->rps_map, map); |
607 | spin_unlock(&rps_map_lock); | |
608 | ||
adc9300e ED |
609 | if (map) |
610 | jump_label_inc(&rps_needed); | |
611 | if (old_map) { | |
f6f80238 | 612 | kfree_rcu(old_map, rcu); |
adc9300e ED |
613 | jump_label_dec(&rps_needed); |
614 | } | |
0a9627f2 TH |
615 | free_cpumask_var(mask); |
616 | return len; | |
617 | } | |
618 | ||
fec5e652 TH |
619 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
620 | struct rx_queue_attribute *attr, | |
621 | char *buf) | |
622 | { | |
623 | struct rps_dev_flow_table *flow_table; | |
624 | unsigned int val = 0; | |
625 | ||
626 | rcu_read_lock(); | |
627 | flow_table = rcu_dereference(queue->rps_flow_table); | |
628 | if (flow_table) | |
629 | val = flow_table->mask + 1; | |
630 | rcu_read_unlock(); | |
631 | ||
632 | return sprintf(buf, "%u\n", val); | |
633 | } | |
634 | ||
635 | static void rps_dev_flow_table_release_work(struct work_struct *work) | |
636 | { | |
637 | struct rps_dev_flow_table *table = container_of(work, | |
638 | struct rps_dev_flow_table, free_work); | |
639 | ||
640 | vfree(table); | |
641 | } | |
642 | ||
643 | static void rps_dev_flow_table_release(struct rcu_head *rcu) | |
644 | { | |
645 | struct rps_dev_flow_table *table = container_of(rcu, | |
646 | struct rps_dev_flow_table, rcu); | |
647 | ||
648 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); | |
649 | schedule_work(&table->free_work); | |
650 | } | |
651 | ||
f5acb907 | 652 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
653 | struct rx_queue_attribute *attr, |
654 | const char *buf, size_t len) | |
655 | { | |
656 | unsigned int count; | |
657 | char *endp; | |
658 | struct rps_dev_flow_table *table, *old_table; | |
659 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
660 | ||
661 | if (!capable(CAP_NET_ADMIN)) | |
662 | return -EPERM; | |
663 | ||
664 | count = simple_strtoul(buf, &endp, 0); | |
665 | if (endp == buf) | |
666 | return -EINVAL; | |
667 | ||
668 | if (count) { | |
669 | int i; | |
670 | ||
671 | if (count > 1<<30) { | |
672 | /* Enforce a limit to prevent overflow */ | |
673 | return -EINVAL; | |
674 | } | |
675 | count = roundup_pow_of_two(count); | |
676 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count)); | |
677 | if (!table) | |
678 | return -ENOMEM; | |
679 | ||
680 | table->mask = count - 1; | |
681 | for (i = 0; i < count; i++) | |
682 | table->flows[i].cpu = RPS_NO_CPU; | |
683 | } else | |
684 | table = NULL; | |
685 | ||
686 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
687 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
688 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
689 | rcu_assign_pointer(queue->rps_flow_table, table); |
690 | spin_unlock(&rps_dev_flow_lock); | |
691 | ||
692 | if (old_table) | |
693 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
694 | ||
695 | return len; | |
696 | } | |
697 | ||
0a9627f2 TH |
698 | static struct rx_queue_attribute rps_cpus_attribute = |
699 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
700 | ||
fec5e652 TH |
701 | |
702 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
703 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
704 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
705 | ||
0a9627f2 TH |
706 | static struct attribute *rx_queue_default_attrs[] = { |
707 | &rps_cpus_attribute.attr, | |
fec5e652 | 708 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
709 | NULL |
710 | }; | |
711 | ||
712 | static void rx_queue_release(struct kobject *kobj) | |
713 | { | |
714 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
6e3f7faf ED |
715 | struct rps_map *map; |
716 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 717 | |
fec5e652 | 718 | |
33d480ce | 719 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
720 | if (map) { |
721 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 722 | kfree_rcu(map, rcu); |
9ea19481 | 723 | } |
6e3f7faf | 724 | |
33d480ce | 725 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
726 | if (flow_table) { |
727 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 728 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 729 | } |
0a9627f2 | 730 | |
9ea19481 | 731 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 732 | dev_put(queue->dev); |
0a9627f2 TH |
733 | } |
734 | ||
735 | static struct kobj_type rx_queue_ktype = { | |
736 | .sysfs_ops = &rx_queue_sysfs_ops, | |
737 | .release = rx_queue_release, | |
738 | .default_attrs = rx_queue_default_attrs, | |
739 | }; | |
740 | ||
741 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
742 | { | |
743 | struct netdev_rx_queue *queue = net->_rx + index; | |
744 | struct kobject *kobj = &queue->kobj; | |
745 | int error = 0; | |
746 | ||
747 | kobj->kset = net->queues_kset; | |
748 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
749 | "rx-%u", index); | |
750 | if (error) { | |
751 | kobject_put(kobj); | |
752 | return error; | |
753 | } | |
754 | ||
755 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 756 | dev_hold(queue->dev); |
0a9627f2 TH |
757 | |
758 | return error; | |
759 | } | |
bf264145 | 760 | #endif /* CONFIG_RPS */ |
0a9627f2 | 761 | |
62fe0b40 BH |
762 | int |
763 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 764 | { |
bf264145 | 765 | #ifdef CONFIG_RPS |
0a9627f2 TH |
766 | int i; |
767 | int error = 0; | |
768 | ||
62fe0b40 | 769 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 770 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
771 | if (error) { |
772 | new_num = old_num; | |
0a9627f2 | 773 | break; |
62fe0b40 | 774 | } |
0a9627f2 TH |
775 | } |
776 | ||
62fe0b40 BH |
777 | while (--i >= new_num) |
778 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
779 | |
780 | return error; | |
bf264145 TH |
781 | #else |
782 | return 0; | |
783 | #endif | |
0a9627f2 TH |
784 | } |
785 | ||
ccf5ff69 | 786 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
787 | /* |
788 | * netdev_queue sysfs structures and functions. | |
789 | */ | |
790 | struct netdev_queue_attribute { | |
791 | struct attribute attr; | |
792 | ssize_t (*show)(struct netdev_queue *queue, | |
793 | struct netdev_queue_attribute *attr, char *buf); | |
794 | ssize_t (*store)(struct netdev_queue *queue, | |
795 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
796 | }; | |
797 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
798 | struct netdev_queue_attribute, attr) | |
799 | ||
800 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
801 | ||
802 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
803 | struct attribute *attr, char *buf) | |
804 | { | |
805 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
806 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
807 | ||
808 | if (!attribute->show) | |
809 | return -EIO; | |
810 | ||
811 | return attribute->show(queue, attribute, buf); | |
812 | } | |
813 | ||
814 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
815 | struct attribute *attr, | |
816 | const char *buf, size_t count) | |
817 | { | |
818 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
819 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
820 | ||
821 | if (!attribute->store) | |
822 | return -EIO; | |
823 | ||
824 | return attribute->store(queue, attribute, buf, count); | |
825 | } | |
826 | ||
827 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
828 | .show = netdev_queue_attr_show, | |
829 | .store = netdev_queue_attr_store, | |
830 | }; | |
831 | ||
ccf5ff69 | 832 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
833 | struct netdev_queue_attribute *attribute, | |
834 | char *buf) | |
835 | { | |
836 | unsigned long trans_timeout; | |
837 | ||
838 | spin_lock_irq(&queue->_xmit_lock); | |
839 | trans_timeout = queue->trans_timeout; | |
840 | spin_unlock_irq(&queue->_xmit_lock); | |
841 | ||
842 | return sprintf(buf, "%lu", trans_timeout); | |
843 | } | |
844 | ||
845 | static struct netdev_queue_attribute queue_trans_timeout = | |
846 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); | |
847 | ||
848 | #ifdef CONFIG_XPS | |
1d24eb48 | 849 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
0a9627f2 | 850 | { |
1d24eb48 TH |
851 | struct net_device *dev = queue->dev; |
852 | int i; | |
853 | ||
854 | for (i = 0; i < dev->num_tx_queues; i++) | |
855 | if (queue == &dev->_tx[i]) | |
856 | break; | |
857 | ||
858 | BUG_ON(i >= dev->num_tx_queues); | |
859 | ||
860 | return i; | |
861 | } | |
862 | ||
863 | ||
864 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
865 | struct netdev_queue_attribute *attribute, char *buf) | |
866 | { | |
867 | struct net_device *dev = queue->dev; | |
868 | struct xps_dev_maps *dev_maps; | |
869 | cpumask_var_t mask; | |
870 | unsigned long index; | |
871 | size_t len = 0; | |
872 | int i; | |
873 | ||
874 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
875 | return -ENOMEM; | |
876 | ||
877 | index = get_netdev_queue_index(queue); | |
878 | ||
879 | rcu_read_lock(); | |
880 | dev_maps = rcu_dereference(dev->xps_maps); | |
881 | if (dev_maps) { | |
882 | for_each_possible_cpu(i) { | |
883 | struct xps_map *map = | |
884 | rcu_dereference(dev_maps->cpu_map[i]); | |
885 | if (map) { | |
886 | int j; | |
887 | for (j = 0; j < map->len; j++) { | |
888 | if (map->queues[j] == index) { | |
889 | cpumask_set_cpu(i, mask); | |
890 | break; | |
891 | } | |
892 | } | |
893 | } | |
894 | } | |
895 | } | |
896 | rcu_read_unlock(); | |
897 | ||
898 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
899 | if (PAGE_SIZE - len < 3) { | |
900 | free_cpumask_var(mask); | |
901 | return -EINVAL; | |
902 | } | |
903 | ||
904 | free_cpumask_var(mask); | |
905 | len += sprintf(buf + len, "\n"); | |
906 | return len; | |
907 | } | |
908 | ||
1d24eb48 | 909 | static DEFINE_MUTEX(xps_map_mutex); |
a4177869 ED |
910 | #define xmap_dereference(P) \ |
911 | rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex)) | |
1d24eb48 | 912 | |
927fbec1 TH |
913 | static void xps_queue_release(struct netdev_queue *queue) |
914 | { | |
915 | struct net_device *dev = queue->dev; | |
916 | struct xps_dev_maps *dev_maps; | |
917 | struct xps_map *map; | |
918 | unsigned long index; | |
919 | int i, pos, nonempty = 0; | |
920 | ||
921 | index = get_netdev_queue_index(queue); | |
922 | ||
923 | mutex_lock(&xps_map_mutex); | |
924 | dev_maps = xmap_dereference(dev->xps_maps); | |
925 | ||
926 | if (dev_maps) { | |
927 | for_each_possible_cpu(i) { | |
928 | map = xmap_dereference(dev_maps->cpu_map[i]); | |
929 | if (!map) | |
930 | continue; | |
931 | ||
932 | for (pos = 0; pos < map->len; pos++) | |
933 | if (map->queues[pos] == index) | |
934 | break; | |
935 | ||
936 | if (pos < map->len) { | |
937 | if (map->len > 1) | |
938 | map->queues[pos] = | |
939 | map->queues[--map->len]; | |
940 | else { | |
941 | RCU_INIT_POINTER(dev_maps->cpu_map[i], | |
942 | NULL); | |
943 | kfree_rcu(map, rcu); | |
944 | map = NULL; | |
945 | } | |
946 | } | |
947 | if (map) | |
948 | nonempty = 1; | |
949 | } | |
950 | ||
951 | if (!nonempty) { | |
952 | RCU_INIT_POINTER(dev->xps_maps, NULL); | |
953 | kfree_rcu(dev_maps, rcu); | |
954 | } | |
955 | } | |
956 | mutex_unlock(&xps_map_mutex); | |
957 | } | |
958 | ||
1d24eb48 TH |
959 | static ssize_t store_xps_map(struct netdev_queue *queue, |
960 | struct netdev_queue_attribute *attribute, | |
961 | const char *buf, size_t len) | |
962 | { | |
963 | struct net_device *dev = queue->dev; | |
964 | cpumask_var_t mask; | |
965 | int err, i, cpu, pos, map_len, alloc_len, need_set; | |
966 | unsigned long index; | |
967 | struct xps_map *map, *new_map; | |
968 | struct xps_dev_maps *dev_maps, *new_dev_maps; | |
969 | int nonempty = 0; | |
19b05f81 | 970 | int numa_node_id = -2; |
1d24eb48 TH |
971 | |
972 | if (!capable(CAP_NET_ADMIN)) | |
973 | return -EPERM; | |
974 | ||
975 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
976 | return -ENOMEM; | |
977 | ||
978 | index = get_netdev_queue_index(queue); | |
979 | ||
980 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
981 | if (err) { | |
982 | free_cpumask_var(mask); | |
983 | return err; | |
984 | } | |
985 | ||
986 | new_dev_maps = kzalloc(max_t(unsigned, | |
987 | XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL); | |
988 | if (!new_dev_maps) { | |
989 | free_cpumask_var(mask); | |
990 | return -ENOMEM; | |
991 | } | |
992 | ||
993 | mutex_lock(&xps_map_mutex); | |
994 | ||
a4177869 | 995 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
996 | |
997 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
998 | map = dev_maps ? |
999 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
1000 | new_map = map; | |
1d24eb48 TH |
1001 | if (map) { |
1002 | for (pos = 0; pos < map->len; pos++) | |
1003 | if (map->queues[pos] == index) | |
1004 | break; | |
1005 | map_len = map->len; | |
1006 | alloc_len = map->alloc_len; | |
1007 | } else | |
1008 | pos = map_len = alloc_len = 0; | |
1009 | ||
2142c131 | 1010 | need_set = cpumask_test_cpu(cpu, mask) && cpu_online(cpu); |
f2cd2d3e ED |
1011 | #ifdef CONFIG_NUMA |
1012 | if (need_set) { | |
19b05f81 | 1013 | if (numa_node_id == -2) |
1014 | numa_node_id = cpu_to_node(cpu); | |
1015 | else if (numa_node_id != cpu_to_node(cpu)) | |
1016 | numa_node_id = -1; | |
f2cd2d3e ED |
1017 | } |
1018 | #endif | |
1d24eb48 TH |
1019 | if (need_set && pos >= map_len) { |
1020 | /* Need to add queue to this CPU's map */ | |
1021 | if (map_len >= alloc_len) { | |
1022 | alloc_len = alloc_len ? | |
1023 | 2 * alloc_len : XPS_MIN_MAP_ALLOC; | |
b02038a1 ED |
1024 | new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len), |
1025 | GFP_KERNEL, | |
1026 | cpu_to_node(cpu)); | |
1d24eb48 TH |
1027 | if (!new_map) |
1028 | goto error; | |
1029 | new_map->alloc_len = alloc_len; | |
1030 | for (i = 0; i < map_len; i++) | |
1031 | new_map->queues[i] = map->queues[i]; | |
1032 | new_map->len = map_len; | |
1033 | } | |
1034 | new_map->queues[new_map->len++] = index; | |
1035 | } else if (!need_set && pos < map_len) { | |
1036 | /* Need to remove queue from this CPU's map */ | |
1037 | if (map_len > 1) | |
1038 | new_map->queues[pos] = | |
1039 | new_map->queues[--new_map->len]; | |
1040 | else | |
1041 | new_map = NULL; | |
1042 | } | |
a4177869 | 1043 | RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map); |
1d24eb48 TH |
1044 | } |
1045 | ||
1046 | /* Cleanup old maps */ | |
1047 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
1048 | map = dev_maps ? |
1049 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
1050 | if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map) | |
edc86d8a | 1051 | kfree_rcu(map, rcu); |
1d24eb48 TH |
1052 | if (new_dev_maps->cpu_map[cpu]) |
1053 | nonempty = 1; | |
1054 | } | |
1055 | ||
1056 | if (nonempty) | |
a9b3cd7f | 1057 | RCU_INIT_POINTER(dev->xps_maps, new_dev_maps); |
1d24eb48 TH |
1058 | else { |
1059 | kfree(new_dev_maps); | |
a9b3cd7f | 1060 | RCU_INIT_POINTER(dev->xps_maps, NULL); |
1d24eb48 TH |
1061 | } |
1062 | ||
1063 | if (dev_maps) | |
b55071eb | 1064 | kfree_rcu(dev_maps, rcu); |
1d24eb48 | 1065 | |
19b05f81 | 1066 | netdev_queue_numa_node_write(queue, (numa_node_id >= 0) ? numa_node_id : |
b236da69 | 1067 | NUMA_NO_NODE); |
f2cd2d3e | 1068 | |
1d24eb48 TH |
1069 | mutex_unlock(&xps_map_mutex); |
1070 | ||
1071 | free_cpumask_var(mask); | |
1072 | return len; | |
1073 | ||
1074 | error: | |
1075 | mutex_unlock(&xps_map_mutex); | |
1076 | ||
1077 | if (new_dev_maps) | |
1078 | for_each_possible_cpu(i) | |
a4177869 ED |
1079 | kfree(rcu_dereference_protected( |
1080 | new_dev_maps->cpu_map[i], | |
1081 | 1)); | |
1d24eb48 TH |
1082 | kfree(new_dev_maps); |
1083 | free_cpumask_var(mask); | |
1084 | return -ENOMEM; | |
1085 | } | |
1086 | ||
1087 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1088 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
ccf5ff69 | 1089 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1090 | |
1091 | static struct attribute *netdev_queue_default_attrs[] = { | |
ccf5ff69 | 1092 | &queue_trans_timeout.attr, |
1093 | #ifdef CONFIG_XPS | |
1d24eb48 | 1094 | &xps_cpus_attribute.attr, |
ccf5ff69 | 1095 | #endif |
1d24eb48 TH |
1096 | NULL |
1097 | }; | |
1098 | ||
ccf5ff69 | 1099 | #ifdef CONFIG_XPS |
1d24eb48 TH |
1100 | static void netdev_queue_release(struct kobject *kobj) |
1101 | { | |
1102 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1103 | |
927fbec1 | 1104 | xps_queue_release(queue); |
1d24eb48 TH |
1105 | |
1106 | memset(kobj, 0, sizeof(*kobj)); | |
1107 | dev_put(queue->dev); | |
1108 | } | |
ccf5ff69 | 1109 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1110 | |
1111 | static struct kobj_type netdev_queue_ktype = { | |
1112 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
ccf5ff69 | 1113 | #ifdef CONFIG_XPS |
1d24eb48 | 1114 | .release = netdev_queue_release, |
ccf5ff69 | 1115 | #endif |
1d24eb48 TH |
1116 | .default_attrs = netdev_queue_default_attrs, |
1117 | }; | |
1118 | ||
1119 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1120 | { | |
1121 | struct netdev_queue *queue = net->_tx + index; | |
1122 | struct kobject *kobj = &queue->kobj; | |
1123 | int error = 0; | |
1124 | ||
1125 | kobj->kset = net->queues_kset; | |
1126 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1127 | "tx-%u", index); | |
1128 | if (error) { | |
1129 | kobject_put(kobj); | |
1130 | return error; | |
1131 | } | |
1132 | ||
1133 | kobject_uevent(kobj, KOBJ_ADD); | |
1134 | dev_hold(queue->dev); | |
1135 | ||
1136 | return error; | |
1137 | } | |
ccf5ff69 | 1138 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1139 | |
1140 | int | |
1141 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1142 | { | |
ccf5ff69 | 1143 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1144 | int i; |
1145 | int error = 0; | |
1146 | ||
1147 | for (i = old_num; i < new_num; i++) { | |
1148 | error = netdev_queue_add_kobject(net, i); | |
1149 | if (error) { | |
1150 | new_num = old_num; | |
1151 | break; | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | while (--i >= new_num) | |
1156 | kobject_put(&net->_tx[i].kobj); | |
1157 | ||
1158 | return error; | |
bf264145 TH |
1159 | #else |
1160 | return 0; | |
ccf5ff69 | 1161 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1162 | } |
1163 | ||
1164 | static int register_queue_kobjects(struct net_device *net) | |
1165 | { | |
bf264145 | 1166 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1167 | |
ccf5ff69 | 1168 | #ifdef CONFIG_SYSFS |
62fe0b40 BH |
1169 | net->queues_kset = kset_create_and_add("queues", |
1170 | NULL, &net->dev.kobj); | |
1171 | if (!net->queues_kset) | |
1172 | return -ENOMEM; | |
bf264145 TH |
1173 | #endif |
1174 | ||
1175 | #ifdef CONFIG_RPS | |
1176 | real_rx = net->real_num_rx_queues; | |
1177 | #endif | |
1178 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1179 | |
bf264145 | 1180 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1181 | if (error) |
1182 | goto error; | |
bf264145 | 1183 | rxq = real_rx; |
1d24eb48 | 1184 | |
bf264145 | 1185 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1186 | if (error) |
1187 | goto error; | |
bf264145 | 1188 | txq = real_tx; |
1d24eb48 TH |
1189 | |
1190 | return 0; | |
1191 | ||
1192 | error: | |
1193 | netdev_queue_update_kobjects(net, txq, 0); | |
1194 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1195 | return error; | |
62fe0b40 | 1196 | } |
0a9627f2 | 1197 | |
1d24eb48 | 1198 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1199 | { |
bf264145 TH |
1200 | int real_rx = 0, real_tx = 0; |
1201 | ||
1202 | #ifdef CONFIG_RPS | |
1203 | real_rx = net->real_num_rx_queues; | |
1204 | #endif | |
1205 | real_tx = net->real_num_tx_queues; | |
1206 | ||
1207 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1208 | netdev_queue_update_kobjects(net, real_tx, 0); | |
ccf5ff69 | 1209 | #ifdef CONFIG_SYSFS |
0a9627f2 | 1210 | kset_unregister(net->queues_kset); |
bf264145 | 1211 | #endif |
0a9627f2 | 1212 | } |
608b4b95 | 1213 | |
a685e089 | 1214 | static void *net_grab_current_ns(void) |
608b4b95 | 1215 | { |
a685e089 AV |
1216 | struct net *ns = current->nsproxy->net_ns; |
1217 | #ifdef CONFIG_NET_NS | |
1218 | if (ns) | |
1219 | atomic_inc(&ns->passive); | |
1220 | #endif | |
1221 | return ns; | |
608b4b95 EB |
1222 | } |
1223 | ||
1224 | static const void *net_initial_ns(void) | |
1225 | { | |
1226 | return &init_net; | |
1227 | } | |
1228 | ||
1229 | static const void *net_netlink_ns(struct sock *sk) | |
1230 | { | |
1231 | return sock_net(sk); | |
1232 | } | |
1233 | ||
04600794 | 1234 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1235 | .type = KOBJ_NS_TYPE_NET, |
a685e089 | 1236 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1237 | .netlink_ns = net_netlink_ns, |
1238 | .initial_ns = net_initial_ns, | |
a685e089 | 1239 | .drop_ns = net_drop_ns, |
608b4b95 | 1240 | }; |
04600794 | 1241 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1242 | |
1da177e4 | 1243 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 1244 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1245 | { |
43cb76d9 | 1246 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1247 | int retval; |
1da177e4 | 1248 | |
312c004d | 1249 | /* pass interface to uevent. */ |
7eff2e7a | 1250 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1251 | if (retval) |
1252 | goto exit; | |
ca2f37db JT |
1253 | |
1254 | /* pass ifindex to uevent. | |
1255 | * ifindex is useful as it won't change (interface name may change) | |
1256 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1257 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1258 | |
bf62456e | 1259 | exit: |
bf62456e | 1260 | return retval; |
1da177e4 LT |
1261 | } |
1262 | #endif | |
1263 | ||
1264 | /* | |
4ec93edb | 1265 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1266 | * Called when last reference to device kobject is gone. |
1da177e4 | 1267 | */ |
43cb76d9 | 1268 | static void netdev_release(struct device *d) |
1da177e4 | 1269 | { |
43cb76d9 | 1270 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1271 | |
1272 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1273 | ||
0b815a1a | 1274 | kfree(dev->ifalias); |
1da177e4 LT |
1275 | kfree((char *)dev - dev->padded); |
1276 | } | |
1277 | ||
608b4b95 EB |
1278 | static const void *net_namespace(struct device *d) |
1279 | { | |
1280 | struct net_device *dev; | |
1281 | dev = container_of(d, struct net_device, dev); | |
1282 | return dev_net(dev); | |
1283 | } | |
1284 | ||
1da177e4 LT |
1285 | static struct class net_class = { |
1286 | .name = "net", | |
43cb76d9 | 1287 | .dev_release = netdev_release, |
8b41d188 | 1288 | #ifdef CONFIG_SYSFS |
43cb76d9 | 1289 | .dev_attrs = net_class_attributes, |
8b41d188 | 1290 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1291 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 1292 | .dev_uevent = netdev_uevent, |
1da177e4 | 1293 | #endif |
608b4b95 EB |
1294 | .ns_type = &net_ns_type_operations, |
1295 | .namespace = net_namespace, | |
1da177e4 LT |
1296 | }; |
1297 | ||
9093bbb2 SH |
1298 | /* Delete sysfs entries but hold kobject reference until after all |
1299 | * netdev references are gone. | |
1300 | */ | |
8b41d188 | 1301 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1302 | { |
9093bbb2 SH |
1303 | struct device *dev = &(net->dev); |
1304 | ||
1305 | kobject_get(&dev->kobj); | |
3891845e | 1306 | |
1d24eb48 | 1307 | remove_queue_kobjects(net); |
0a9627f2 | 1308 | |
9093bbb2 | 1309 | device_del(dev); |
1da177e4 LT |
1310 | } |
1311 | ||
1312 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1313 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1314 | { |
43cb76d9 | 1315 | struct device *dev = &(net->dev); |
a4dbd674 | 1316 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1317 | int error = 0; |
1da177e4 | 1318 | |
a1b3f594 | 1319 | device_initialize(dev); |
43cb76d9 GKH |
1320 | dev->class = &net_class; |
1321 | dev->platform_data = net; | |
1322 | dev->groups = groups; | |
1da177e4 | 1323 | |
a2205472 | 1324 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1325 | |
8b41d188 | 1326 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1327 | /* Allow for a device specific group */ |
1328 | if (*groups) | |
1329 | groups++; | |
1da177e4 | 1330 | |
0c509a6c | 1331 | *groups++ = &netstat_group; |
22bb1be4 | 1332 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 1333 | if (net->ieee80211_ptr) |
fe9925b5 | 1334 | *groups++ = &wireless_group; |
3d23e349 JB |
1335 | #ifdef CONFIG_WIRELESS_EXT |
1336 | else if (net->wireless_handlers) | |
1337 | *groups++ = &wireless_group; | |
1338 | #endif | |
1da177e4 | 1339 | #endif |
8b41d188 | 1340 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1341 | |
0a9627f2 TH |
1342 | error = device_add(dev); |
1343 | if (error) | |
1344 | return error; | |
1345 | ||
1d24eb48 | 1346 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1347 | if (error) { |
1348 | device_del(dev); | |
1349 | return error; | |
1350 | } | |
1351 | ||
1352 | return error; | |
1da177e4 LT |
1353 | } |
1354 | ||
b8a9787e JV |
1355 | int netdev_class_create_file(struct class_attribute *class_attr) |
1356 | { | |
1357 | return class_create_file(&net_class, class_attr); | |
1358 | } | |
9e34a5b5 | 1359 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
1360 | |
1361 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
1362 | { | |
1363 | class_remove_file(&net_class, class_attr); | |
1364 | } | |
b8a9787e JV |
1365 | EXPORT_SYMBOL(netdev_class_remove_file); |
1366 | ||
8b41d188 | 1367 | int netdev_kobject_init(void) |
1da177e4 | 1368 | { |
608b4b95 | 1369 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1370 | return class_register(&net_class); |
1371 | } |