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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
4ec93edb | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/if_arp.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
608b4b95 | 17 | #include <linux/nsproxy.h> |
1da177e4 | 18 | #include <net/sock.h> |
608b4b95 | 19 | #include <net/net_namespace.h> |
1da177e4 LT |
20 | #include <linux/rtnetlink.h> |
21 | #include <linux/wireless.h> | |
fec5e652 | 22 | #include <linux/vmalloc.h> |
8f1546ca | 23 | #include <net/wext.h> |
1da177e4 | 24 | |
342709ef PE |
25 | #include "net-sysfs.h" |
26 | ||
8b41d188 | 27 | #ifdef CONFIG_SYSFS |
1da177e4 | 28 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 29 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 LT |
30 | static const char fmt_dec[] = "%d\n"; |
31 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 32 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 33 | |
4ec93edb | 34 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 35 | { |
fe9925b5 | 36 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
37 | } |
38 | ||
39 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
40 | static ssize_t netdev_show(const struct device *dev, |
41 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
42 | ssize_t (*format)(const struct net_device *, char *)) |
43 | { | |
43cb76d9 | 44 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
45 | ssize_t ret = -EINVAL; |
46 | ||
47 | read_lock(&dev_base_lock); | |
48 | if (dev_isalive(net)) | |
49 | ret = (*format)(net, buf); | |
50 | read_unlock(&dev_base_lock); | |
51 | ||
52 | return ret; | |
53 | } | |
54 | ||
55 | /* generate a show function for simple field */ | |
56 | #define NETDEVICE_SHOW(field, format_string) \ | |
57 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
58 | { \ | |
59 | return sprintf(buf, format_string, net->field); \ | |
60 | } \ | |
43cb76d9 GKH |
61 | static ssize_t show_##field(struct device *dev, \ |
62 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 63 | { \ |
43cb76d9 | 64 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
65 | } |
66 | ||
67 | ||
68 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 69 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
70 | const char *buf, size_t len, |
71 | int (*set)(struct net_device *, unsigned long)) | |
72 | { | |
73 | struct net_device *net = to_net_dev(dev); | |
74 | char *endp; | |
75 | unsigned long new; | |
76 | int ret = -EINVAL; | |
77 | ||
78 | if (!capable(CAP_NET_ADMIN)) | |
79 | return -EPERM; | |
80 | ||
81 | new = simple_strtoul(buf, &endp, 0); | |
82 | if (endp == buf) | |
83 | goto err; | |
84 | ||
5a5990d3 | 85 | if (!rtnl_trylock()) |
336ca57c | 86 | return restart_syscall(); |
5a5990d3 | 87 | |
1da177e4 LT |
88 | if (dev_isalive(net)) { |
89 | if ((ret = (*set)(net, new)) == 0) | |
90 | ret = len; | |
91 | } | |
92 | rtnl_unlock(); | |
93 | err: | |
94 | return ret; | |
95 | } | |
96 | ||
9d29672c | 97 | NETDEVICE_SHOW(dev_id, fmt_hex); |
c1f79426 | 98 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
fd586bac KS |
99 | NETDEVICE_SHOW(addr_len, fmt_dec); |
100 | NETDEVICE_SHOW(iflink, fmt_dec); | |
101 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
102 | NETDEVICE_SHOW(features, fmt_long_hex); | |
103 | NETDEVICE_SHOW(type, fmt_dec); | |
b00055aa | 104 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
105 | |
106 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
107 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
108 | char *buf) | |
1da177e4 LT |
109 | { |
110 | struct net_device *net = to_net_dev(dev); | |
111 | ssize_t ret = -EINVAL; | |
112 | ||
113 | read_lock(&dev_base_lock); | |
114 | if (dev_isalive(net)) | |
7ffc49a6 | 115 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
116 | read_unlock(&dev_base_lock); |
117 | return ret; | |
118 | } | |
119 | ||
43cb76d9 GKH |
120 | static ssize_t show_broadcast(struct device *dev, |
121 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
122 | { |
123 | struct net_device *net = to_net_dev(dev); | |
124 | if (dev_isalive(net)) | |
7ffc49a6 | 125 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
126 | return -EINVAL; |
127 | } | |
128 | ||
43cb76d9 GKH |
129 | static ssize_t show_carrier(struct device *dev, |
130 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
131 | { |
132 | struct net_device *netdev = to_net_dev(dev); | |
133 | if (netif_running(netdev)) { | |
134 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
135 | } | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
d519e17e AG |
139 | static ssize_t show_speed(struct device *dev, |
140 | struct device_attribute *attr, char *buf) | |
141 | { | |
142 | struct net_device *netdev = to_net_dev(dev); | |
143 | int ret = -EINVAL; | |
144 | ||
145 | if (!rtnl_trylock()) | |
146 | return restart_syscall(); | |
147 | ||
ac5e3af9 ED |
148 | if (netif_running(netdev) && |
149 | netdev->ethtool_ops && | |
150 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
151 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; |
152 | ||
153 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
154 | ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd)); | |
155 | } | |
156 | rtnl_unlock(); | |
157 | return ret; | |
158 | } | |
159 | ||
160 | static ssize_t show_duplex(struct device *dev, | |
161 | struct device_attribute *attr, char *buf) | |
162 | { | |
163 | struct net_device *netdev = to_net_dev(dev); | |
164 | int ret = -EINVAL; | |
165 | ||
166 | if (!rtnl_trylock()) | |
167 | return restart_syscall(); | |
168 | ||
ac5e3af9 ED |
169 | if (netif_running(netdev) && |
170 | netdev->ethtool_ops && | |
171 | netdev->ethtool_ops->get_settings) { | |
d519e17e AG |
172 | struct ethtool_cmd cmd = { ETHTOOL_GSET }; |
173 | ||
174 | if (!netdev->ethtool_ops->get_settings(netdev, &cmd)) | |
175 | ret = sprintf(buf, "%s\n", cmd.duplex ? "full" : "half"); | |
176 | } | |
177 | rtnl_unlock(); | |
178 | return ret; | |
179 | } | |
180 | ||
43cb76d9 GKH |
181 | static ssize_t show_dormant(struct device *dev, |
182 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
183 | { |
184 | struct net_device *netdev = to_net_dev(dev); | |
185 | ||
186 | if (netif_running(netdev)) | |
187 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
188 | ||
189 | return -EINVAL; | |
190 | } | |
191 | ||
36cbd3dc | 192 | static const char *const operstates[] = { |
b00055aa SR |
193 | "unknown", |
194 | "notpresent", /* currently unused */ | |
195 | "down", | |
196 | "lowerlayerdown", | |
197 | "testing", /* currently unused */ | |
198 | "dormant", | |
199 | "up" | |
200 | }; | |
201 | ||
43cb76d9 GKH |
202 | static ssize_t show_operstate(struct device *dev, |
203 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
204 | { |
205 | const struct net_device *netdev = to_net_dev(dev); | |
206 | unsigned char operstate; | |
207 | ||
208 | read_lock(&dev_base_lock); | |
209 | operstate = netdev->operstate; | |
210 | if (!netif_running(netdev)) | |
211 | operstate = IF_OPER_DOWN; | |
212 | read_unlock(&dev_base_lock); | |
213 | ||
e3a5cd9e | 214 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
215 | return -EINVAL; /* should not happen */ |
216 | ||
217 | return sprintf(buf, "%s\n", operstates[operstate]); | |
218 | } | |
219 | ||
1da177e4 LT |
220 | /* read-write attributes */ |
221 | NETDEVICE_SHOW(mtu, fmt_dec); | |
222 | ||
223 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
224 | { | |
225 | return dev_set_mtu(net, (int) new_mtu); | |
226 | } | |
227 | ||
43cb76d9 GKH |
228 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
229 | const char *buf, size_t len) | |
1da177e4 | 230 | { |
43cb76d9 | 231 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
232 | } |
233 | ||
1da177e4 LT |
234 | NETDEVICE_SHOW(flags, fmt_hex); |
235 | ||
236 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
237 | { | |
238 | return dev_change_flags(net, (unsigned) new_flags); | |
239 | } | |
240 | ||
43cb76d9 GKH |
241 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
242 | const char *buf, size_t len) | |
1da177e4 | 243 | { |
43cb76d9 | 244 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
245 | } |
246 | ||
1da177e4 LT |
247 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
248 | ||
249 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
250 | { | |
251 | net->tx_queue_len = new_len; | |
252 | return 0; | |
253 | } | |
254 | ||
43cb76d9 GKH |
255 | static ssize_t store_tx_queue_len(struct device *dev, |
256 | struct device_attribute *attr, | |
257 | const char *buf, size_t len) | |
1da177e4 | 258 | { |
43cb76d9 | 259 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
260 | } |
261 | ||
0b815a1a SH |
262 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
263 | const char *buf, size_t len) | |
264 | { | |
265 | struct net_device *netdev = to_net_dev(dev); | |
266 | size_t count = len; | |
267 | ssize_t ret; | |
268 | ||
269 | if (!capable(CAP_NET_ADMIN)) | |
270 | return -EPERM; | |
271 | ||
272 | /* ignore trailing newline */ | |
273 | if (len > 0 && buf[len - 1] == '\n') | |
274 | --count; | |
275 | ||
336ca57c EB |
276 | if (!rtnl_trylock()) |
277 | return restart_syscall(); | |
0b815a1a SH |
278 | ret = dev_set_alias(netdev, buf, count); |
279 | rtnl_unlock(); | |
280 | ||
281 | return ret < 0 ? ret : len; | |
282 | } | |
283 | ||
284 | static ssize_t show_ifalias(struct device *dev, | |
285 | struct device_attribute *attr, char *buf) | |
286 | { | |
287 | const struct net_device *netdev = to_net_dev(dev); | |
288 | ssize_t ret = 0; | |
289 | ||
336ca57c EB |
290 | if (!rtnl_trylock()) |
291 | return restart_syscall(); | |
0b815a1a SH |
292 | if (netdev->ifalias) |
293 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
294 | rtnl_unlock(); | |
295 | return ret; | |
296 | } | |
297 | ||
43cb76d9 | 298 | static struct device_attribute net_class_attributes[] = { |
c1f79426 | 299 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
fd586bac | 300 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 301 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 302 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
303 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
304 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
305 | __ATTR(features, S_IRUGO, show_features, NULL), | |
306 | __ATTR(type, S_IRUGO, show_type, NULL), | |
b00055aa | 307 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
308 | __ATTR(address, S_IRUGO, show_address, NULL), |
309 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
310 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
311 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
312 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
313 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
314 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
315 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
316 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
317 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
318 | store_tx_queue_len), | |
fd586bac | 319 | {} |
1da177e4 LT |
320 | }; |
321 | ||
322 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
323 | static ssize_t netstat_show(const struct device *d, |
324 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
325 | unsigned long offset) |
326 | { | |
43cb76d9 | 327 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
328 | ssize_t ret = -EINVAL; |
329 | ||
be1f3c2c BH |
330 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
331 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
332 | |
333 | read_lock(&dev_base_lock); | |
96e74088 | 334 | if (dev_isalive(dev)) { |
28172739 ED |
335 | struct rtnl_link_stats64 temp; |
336 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
337 | ||
be1f3c2c | 338 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 339 | } |
1da177e4 LT |
340 | read_unlock(&dev_base_lock); |
341 | return ret; | |
342 | } | |
343 | ||
344 | /* generate a read-only statistics attribute */ | |
345 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
346 | static ssize_t show_##name(struct device *d, \ |
347 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 348 | { \ |
43cb76d9 | 349 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 350 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 351 | } \ |
43cb76d9 | 352 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
353 | |
354 | NETSTAT_ENTRY(rx_packets); | |
355 | NETSTAT_ENTRY(tx_packets); | |
356 | NETSTAT_ENTRY(rx_bytes); | |
357 | NETSTAT_ENTRY(tx_bytes); | |
358 | NETSTAT_ENTRY(rx_errors); | |
359 | NETSTAT_ENTRY(tx_errors); | |
360 | NETSTAT_ENTRY(rx_dropped); | |
361 | NETSTAT_ENTRY(tx_dropped); | |
362 | NETSTAT_ENTRY(multicast); | |
363 | NETSTAT_ENTRY(collisions); | |
364 | NETSTAT_ENTRY(rx_length_errors); | |
365 | NETSTAT_ENTRY(rx_over_errors); | |
366 | NETSTAT_ENTRY(rx_crc_errors); | |
367 | NETSTAT_ENTRY(rx_frame_errors); | |
368 | NETSTAT_ENTRY(rx_fifo_errors); | |
369 | NETSTAT_ENTRY(rx_missed_errors); | |
370 | NETSTAT_ENTRY(tx_aborted_errors); | |
371 | NETSTAT_ENTRY(tx_carrier_errors); | |
372 | NETSTAT_ENTRY(tx_fifo_errors); | |
373 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
374 | NETSTAT_ENTRY(tx_window_errors); | |
375 | NETSTAT_ENTRY(rx_compressed); | |
376 | NETSTAT_ENTRY(tx_compressed); | |
377 | ||
378 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
379 | &dev_attr_rx_packets.attr, |
380 | &dev_attr_tx_packets.attr, | |
381 | &dev_attr_rx_bytes.attr, | |
382 | &dev_attr_tx_bytes.attr, | |
383 | &dev_attr_rx_errors.attr, | |
384 | &dev_attr_tx_errors.attr, | |
385 | &dev_attr_rx_dropped.attr, | |
386 | &dev_attr_tx_dropped.attr, | |
387 | &dev_attr_multicast.attr, | |
388 | &dev_attr_collisions.attr, | |
389 | &dev_attr_rx_length_errors.attr, | |
390 | &dev_attr_rx_over_errors.attr, | |
391 | &dev_attr_rx_crc_errors.attr, | |
392 | &dev_attr_rx_frame_errors.attr, | |
393 | &dev_attr_rx_fifo_errors.attr, | |
394 | &dev_attr_rx_missed_errors.attr, | |
395 | &dev_attr_tx_aborted_errors.attr, | |
396 | &dev_attr_tx_carrier_errors.attr, | |
397 | &dev_attr_tx_fifo_errors.attr, | |
398 | &dev_attr_tx_heartbeat_errors.attr, | |
399 | &dev_attr_tx_window_errors.attr, | |
400 | &dev_attr_rx_compressed.attr, | |
401 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
402 | NULL |
403 | }; | |
404 | ||
405 | ||
406 | static struct attribute_group netstat_group = { | |
407 | .name = "statistics", | |
408 | .attrs = netstat_attrs, | |
409 | }; | |
410 | ||
22bb1be4 | 411 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 412 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 413 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
414 | ssize_t (*format)(const struct iw_statistics *, |
415 | char *)) | |
416 | { | |
43cb76d9 | 417 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 418 | const struct iw_statistics *iw; |
1da177e4 | 419 | ssize_t ret = -EINVAL; |
4ec93edb | 420 | |
b8afe641 EB |
421 | if (!rtnl_trylock()) |
422 | return restart_syscall(); | |
6dd214b5 | 423 | if (dev_isalive(dev)) { |
8f1546ca JB |
424 | iw = get_wireless_stats(dev); |
425 | if (iw) | |
6dd214b5 AB |
426 | ret = (*format)(iw, buf); |
427 | } | |
a160ee69 | 428 | rtnl_unlock(); |
1da177e4 LT |
429 | |
430 | return ret; | |
431 | } | |
432 | ||
433 | /* show function template for wireless fields */ | |
434 | #define WIRELESS_SHOW(name, field, format_string) \ | |
435 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
436 | { \ | |
437 | return sprintf(buf, format_string, iw->field); \ | |
438 | } \ | |
43cb76d9 GKH |
439 | static ssize_t show_iw_##name(struct device *d, \ |
440 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 441 | { \ |
43cb76d9 | 442 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 443 | } \ |
43cb76d9 | 444 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
445 | |
446 | WIRELESS_SHOW(status, status, fmt_hex); | |
447 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
448 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
449 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
450 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
451 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
452 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
453 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
454 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
455 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
456 | ||
457 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
458 | &dev_attr_status.attr, |
459 | &dev_attr_link.attr, | |
460 | &dev_attr_level.attr, | |
461 | &dev_attr_noise.attr, | |
462 | &dev_attr_nwid.attr, | |
463 | &dev_attr_crypt.attr, | |
464 | &dev_attr_fragment.attr, | |
465 | &dev_attr_retries.attr, | |
466 | &dev_attr_misc.attr, | |
467 | &dev_attr_beacon.attr, | |
1da177e4 LT |
468 | NULL |
469 | }; | |
470 | ||
471 | static struct attribute_group wireless_group = { | |
472 | .name = "wireless", | |
473 | .attrs = wireless_attrs, | |
474 | }; | |
475 | #endif | |
d6523ddf | 476 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 477 | |
30bde1f5 | 478 | #ifdef CONFIG_RPS |
0a9627f2 TH |
479 | /* |
480 | * RX queue sysfs structures and functions. | |
481 | */ | |
482 | struct rx_queue_attribute { | |
483 | struct attribute attr; | |
484 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
485 | struct rx_queue_attribute *attr, char *buf); | |
486 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
487 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
488 | }; | |
489 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
490 | struct rx_queue_attribute, attr) | |
491 | ||
492 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
493 | ||
494 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
495 | char *buf) | |
496 | { | |
497 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
498 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
499 | ||
500 | if (!attribute->show) | |
501 | return -EIO; | |
502 | ||
503 | return attribute->show(queue, attribute, buf); | |
504 | } | |
505 | ||
506 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
507 | const char *buf, size_t count) | |
508 | { | |
509 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
510 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
511 | ||
512 | if (!attribute->store) | |
513 | return -EIO; | |
514 | ||
515 | return attribute->store(queue, attribute, buf, count); | |
516 | } | |
517 | ||
fa50d645 | 518 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
519 | .show = rx_queue_attr_show, |
520 | .store = rx_queue_attr_store, | |
521 | }; | |
522 | ||
523 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
524 | struct rx_queue_attribute *attribute, char *buf) | |
525 | { | |
526 | struct rps_map *map; | |
527 | cpumask_var_t mask; | |
528 | size_t len = 0; | |
529 | int i; | |
530 | ||
531 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
532 | return -ENOMEM; | |
533 | ||
534 | rcu_read_lock(); | |
535 | map = rcu_dereference(queue->rps_map); | |
536 | if (map) | |
537 | for (i = 0; i < map->len; i++) | |
538 | cpumask_set_cpu(map->cpus[i], mask); | |
539 | ||
540 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
541 | if (PAGE_SIZE - len < 3) { | |
542 | rcu_read_unlock(); | |
543 | free_cpumask_var(mask); | |
544 | return -EINVAL; | |
545 | } | |
546 | rcu_read_unlock(); | |
547 | ||
548 | free_cpumask_var(mask); | |
549 | len += sprintf(buf + len, "\n"); | |
550 | return len; | |
551 | } | |
552 | ||
553 | static void rps_map_release(struct rcu_head *rcu) | |
554 | { | |
555 | struct rps_map *map = container_of(rcu, struct rps_map, rcu); | |
556 | ||
557 | kfree(map); | |
558 | } | |
559 | ||
f5acb907 | 560 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
561 | struct rx_queue_attribute *attribute, |
562 | const char *buf, size_t len) | |
563 | { | |
564 | struct rps_map *old_map, *map; | |
565 | cpumask_var_t mask; | |
566 | int err, cpu, i; | |
567 | static DEFINE_SPINLOCK(rps_map_lock); | |
568 | ||
569 | if (!capable(CAP_NET_ADMIN)) | |
570 | return -EPERM; | |
571 | ||
572 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
573 | return -ENOMEM; | |
574 | ||
575 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
576 | if (err) { | |
577 | free_cpumask_var(mask); | |
578 | return err; | |
579 | } | |
580 | ||
581 | map = kzalloc(max_t(unsigned, | |
582 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
583 | GFP_KERNEL); | |
584 | if (!map) { | |
585 | free_cpumask_var(mask); | |
586 | return -ENOMEM; | |
587 | } | |
588 | ||
589 | i = 0; | |
590 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
591 | map->cpus[i++] = cpu; | |
592 | ||
593 | if (i) | |
594 | map->len = i; | |
595 | else { | |
596 | kfree(map); | |
597 | map = NULL; | |
598 | } | |
599 | ||
600 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
601 | old_map = rcu_dereference_protected(queue->rps_map, |
602 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
603 | rcu_assign_pointer(queue->rps_map, map); |
604 | spin_unlock(&rps_map_lock); | |
605 | ||
606 | if (old_map) | |
607 | call_rcu(&old_map->rcu, rps_map_release); | |
608 | ||
609 | free_cpumask_var(mask); | |
610 | return len; | |
611 | } | |
612 | ||
fec5e652 TH |
613 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
614 | struct rx_queue_attribute *attr, | |
615 | char *buf) | |
616 | { | |
617 | struct rps_dev_flow_table *flow_table; | |
618 | unsigned int val = 0; | |
619 | ||
620 | rcu_read_lock(); | |
621 | flow_table = rcu_dereference(queue->rps_flow_table); | |
622 | if (flow_table) | |
623 | val = flow_table->mask + 1; | |
624 | rcu_read_unlock(); | |
625 | ||
626 | return sprintf(buf, "%u\n", val); | |
627 | } | |
628 | ||
629 | static void rps_dev_flow_table_release_work(struct work_struct *work) | |
630 | { | |
631 | struct rps_dev_flow_table *table = container_of(work, | |
632 | struct rps_dev_flow_table, free_work); | |
633 | ||
634 | vfree(table); | |
635 | } | |
636 | ||
637 | static void rps_dev_flow_table_release(struct rcu_head *rcu) | |
638 | { | |
639 | struct rps_dev_flow_table *table = container_of(rcu, | |
640 | struct rps_dev_flow_table, rcu); | |
641 | ||
642 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); | |
643 | schedule_work(&table->free_work); | |
644 | } | |
645 | ||
f5acb907 | 646 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
647 | struct rx_queue_attribute *attr, |
648 | const char *buf, size_t len) | |
649 | { | |
650 | unsigned int count; | |
651 | char *endp; | |
652 | struct rps_dev_flow_table *table, *old_table; | |
653 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
654 | ||
655 | if (!capable(CAP_NET_ADMIN)) | |
656 | return -EPERM; | |
657 | ||
658 | count = simple_strtoul(buf, &endp, 0); | |
659 | if (endp == buf) | |
660 | return -EINVAL; | |
661 | ||
662 | if (count) { | |
663 | int i; | |
664 | ||
665 | if (count > 1<<30) { | |
666 | /* Enforce a limit to prevent overflow */ | |
667 | return -EINVAL; | |
668 | } | |
669 | count = roundup_pow_of_two(count); | |
670 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count)); | |
671 | if (!table) | |
672 | return -ENOMEM; | |
673 | ||
674 | table->mask = count - 1; | |
675 | for (i = 0; i < count; i++) | |
676 | table->flows[i].cpu = RPS_NO_CPU; | |
677 | } else | |
678 | table = NULL; | |
679 | ||
680 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
681 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
682 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
683 | rcu_assign_pointer(queue->rps_flow_table, table); |
684 | spin_unlock(&rps_dev_flow_lock); | |
685 | ||
686 | if (old_table) | |
687 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
688 | ||
689 | return len; | |
690 | } | |
691 | ||
0a9627f2 TH |
692 | static struct rx_queue_attribute rps_cpus_attribute = |
693 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
694 | ||
fec5e652 TH |
695 | |
696 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
697 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
698 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
699 | ||
0a9627f2 TH |
700 | static struct attribute *rx_queue_default_attrs[] = { |
701 | &rps_cpus_attribute.attr, | |
fec5e652 | 702 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
703 | NULL |
704 | }; | |
705 | ||
706 | static void rx_queue_release(struct kobject *kobj) | |
707 | { | |
708 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
6e3f7faf ED |
709 | struct rps_map *map; |
710 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 711 | |
fec5e652 | 712 | |
6e3f7faf | 713 | map = rcu_dereference_raw(queue->rps_map); |
9ea19481 JF |
714 | if (map) { |
715 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
6e3f7faf | 716 | call_rcu(&map->rcu, rps_map_release); |
9ea19481 | 717 | } |
6e3f7faf ED |
718 | |
719 | flow_table = rcu_dereference_raw(queue->rps_flow_table); | |
9ea19481 JF |
720 | if (flow_table) { |
721 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 722 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 723 | } |
0a9627f2 | 724 | |
9ea19481 | 725 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 726 | dev_put(queue->dev); |
0a9627f2 TH |
727 | } |
728 | ||
729 | static struct kobj_type rx_queue_ktype = { | |
730 | .sysfs_ops = &rx_queue_sysfs_ops, | |
731 | .release = rx_queue_release, | |
732 | .default_attrs = rx_queue_default_attrs, | |
733 | }; | |
734 | ||
735 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
736 | { | |
737 | struct netdev_rx_queue *queue = net->_rx + index; | |
738 | struct kobject *kobj = &queue->kobj; | |
739 | int error = 0; | |
740 | ||
741 | kobj->kset = net->queues_kset; | |
742 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
743 | "rx-%u", index); | |
744 | if (error) { | |
745 | kobject_put(kobj); | |
746 | return error; | |
747 | } | |
748 | ||
749 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 750 | dev_hold(queue->dev); |
0a9627f2 TH |
751 | |
752 | return error; | |
753 | } | |
754 | ||
62fe0b40 BH |
755 | int |
756 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 TH |
757 | { |
758 | int i; | |
759 | int error = 0; | |
760 | ||
62fe0b40 | 761 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 762 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
763 | if (error) { |
764 | new_num = old_num; | |
0a9627f2 | 765 | break; |
62fe0b40 | 766 | } |
0a9627f2 TH |
767 | } |
768 | ||
62fe0b40 BH |
769 | while (--i >= new_num) |
770 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
771 | |
772 | return error; | |
773 | } | |
774 | ||
1d24eb48 TH |
775 | /* |
776 | * netdev_queue sysfs structures and functions. | |
777 | */ | |
778 | struct netdev_queue_attribute { | |
779 | struct attribute attr; | |
780 | ssize_t (*show)(struct netdev_queue *queue, | |
781 | struct netdev_queue_attribute *attr, char *buf); | |
782 | ssize_t (*store)(struct netdev_queue *queue, | |
783 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
784 | }; | |
785 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
786 | struct netdev_queue_attribute, attr) | |
787 | ||
788 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
789 | ||
790 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
791 | struct attribute *attr, char *buf) | |
792 | { | |
793 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
794 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
795 | ||
796 | if (!attribute->show) | |
797 | return -EIO; | |
798 | ||
799 | return attribute->show(queue, attribute, buf); | |
800 | } | |
801 | ||
802 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
803 | struct attribute *attr, | |
804 | const char *buf, size_t count) | |
805 | { | |
806 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
807 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
808 | ||
809 | if (!attribute->store) | |
810 | return -EIO; | |
811 | ||
812 | return attribute->store(queue, attribute, buf, count); | |
813 | } | |
814 | ||
815 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
816 | .show = netdev_queue_attr_show, | |
817 | .store = netdev_queue_attr_store, | |
818 | }; | |
819 | ||
820 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) | |
0a9627f2 | 821 | { |
1d24eb48 TH |
822 | struct net_device *dev = queue->dev; |
823 | int i; | |
824 | ||
825 | for (i = 0; i < dev->num_tx_queues; i++) | |
826 | if (queue == &dev->_tx[i]) | |
827 | break; | |
828 | ||
829 | BUG_ON(i >= dev->num_tx_queues); | |
830 | ||
831 | return i; | |
832 | } | |
833 | ||
834 | ||
835 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
836 | struct netdev_queue_attribute *attribute, char *buf) | |
837 | { | |
838 | struct net_device *dev = queue->dev; | |
839 | struct xps_dev_maps *dev_maps; | |
840 | cpumask_var_t mask; | |
841 | unsigned long index; | |
842 | size_t len = 0; | |
843 | int i; | |
844 | ||
845 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
846 | return -ENOMEM; | |
847 | ||
848 | index = get_netdev_queue_index(queue); | |
849 | ||
850 | rcu_read_lock(); | |
851 | dev_maps = rcu_dereference(dev->xps_maps); | |
852 | if (dev_maps) { | |
853 | for_each_possible_cpu(i) { | |
854 | struct xps_map *map = | |
855 | rcu_dereference(dev_maps->cpu_map[i]); | |
856 | if (map) { | |
857 | int j; | |
858 | for (j = 0; j < map->len; j++) { | |
859 | if (map->queues[j] == index) { | |
860 | cpumask_set_cpu(i, mask); | |
861 | break; | |
862 | } | |
863 | } | |
864 | } | |
865 | } | |
866 | } | |
867 | rcu_read_unlock(); | |
868 | ||
869 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
870 | if (PAGE_SIZE - len < 3) { | |
871 | free_cpumask_var(mask); | |
872 | return -EINVAL; | |
873 | } | |
874 | ||
875 | free_cpumask_var(mask); | |
876 | len += sprintf(buf + len, "\n"); | |
877 | return len; | |
878 | } | |
879 | ||
880 | static void xps_map_release(struct rcu_head *rcu) | |
881 | { | |
882 | struct xps_map *map = container_of(rcu, struct xps_map, rcu); | |
883 | ||
884 | kfree(map); | |
885 | } | |
886 | ||
887 | static void xps_dev_maps_release(struct rcu_head *rcu) | |
888 | { | |
889 | struct xps_dev_maps *dev_maps = | |
890 | container_of(rcu, struct xps_dev_maps, rcu); | |
891 | ||
892 | kfree(dev_maps); | |
893 | } | |
894 | ||
895 | static DEFINE_MUTEX(xps_map_mutex); | |
896 | ||
897 | static ssize_t store_xps_map(struct netdev_queue *queue, | |
898 | struct netdev_queue_attribute *attribute, | |
899 | const char *buf, size_t len) | |
900 | { | |
901 | struct net_device *dev = queue->dev; | |
902 | cpumask_var_t mask; | |
903 | int err, i, cpu, pos, map_len, alloc_len, need_set; | |
904 | unsigned long index; | |
905 | struct xps_map *map, *new_map; | |
906 | struct xps_dev_maps *dev_maps, *new_dev_maps; | |
907 | int nonempty = 0; | |
908 | ||
909 | if (!capable(CAP_NET_ADMIN)) | |
910 | return -EPERM; | |
911 | ||
912 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
913 | return -ENOMEM; | |
914 | ||
915 | index = get_netdev_queue_index(queue); | |
916 | ||
917 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
918 | if (err) { | |
919 | free_cpumask_var(mask); | |
920 | return err; | |
921 | } | |
922 | ||
923 | new_dev_maps = kzalloc(max_t(unsigned, | |
924 | XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL); | |
925 | if (!new_dev_maps) { | |
926 | free_cpumask_var(mask); | |
927 | return -ENOMEM; | |
928 | } | |
929 | ||
930 | mutex_lock(&xps_map_mutex); | |
931 | ||
932 | dev_maps = dev->xps_maps; | |
933 | ||
934 | for_each_possible_cpu(cpu) { | |
935 | new_map = map = dev_maps ? dev_maps->cpu_map[cpu] : NULL; | |
936 | ||
937 | if (map) { | |
938 | for (pos = 0; pos < map->len; pos++) | |
939 | if (map->queues[pos] == index) | |
940 | break; | |
941 | map_len = map->len; | |
942 | alloc_len = map->alloc_len; | |
943 | } else | |
944 | pos = map_len = alloc_len = 0; | |
945 | ||
946 | need_set = cpu_isset(cpu, *mask) && cpu_online(cpu); | |
947 | ||
948 | if (need_set && pos >= map_len) { | |
949 | /* Need to add queue to this CPU's map */ | |
950 | if (map_len >= alloc_len) { | |
951 | alloc_len = alloc_len ? | |
952 | 2 * alloc_len : XPS_MIN_MAP_ALLOC; | |
953 | new_map = kzalloc(XPS_MAP_SIZE(alloc_len), | |
954 | GFP_KERNEL); | |
955 | if (!new_map) | |
956 | goto error; | |
957 | new_map->alloc_len = alloc_len; | |
958 | for (i = 0; i < map_len; i++) | |
959 | new_map->queues[i] = map->queues[i]; | |
960 | new_map->len = map_len; | |
961 | } | |
962 | new_map->queues[new_map->len++] = index; | |
963 | } else if (!need_set && pos < map_len) { | |
964 | /* Need to remove queue from this CPU's map */ | |
965 | if (map_len > 1) | |
966 | new_map->queues[pos] = | |
967 | new_map->queues[--new_map->len]; | |
968 | else | |
969 | new_map = NULL; | |
970 | } | |
971 | new_dev_maps->cpu_map[cpu] = new_map; | |
972 | } | |
973 | ||
974 | /* Cleanup old maps */ | |
975 | for_each_possible_cpu(cpu) { | |
976 | map = dev_maps ? dev_maps->cpu_map[cpu] : NULL; | |
977 | if (map && new_dev_maps->cpu_map[cpu] != map) | |
978 | call_rcu(&map->rcu, xps_map_release); | |
979 | if (new_dev_maps->cpu_map[cpu]) | |
980 | nonempty = 1; | |
981 | } | |
982 | ||
983 | if (nonempty) | |
984 | rcu_assign_pointer(dev->xps_maps, new_dev_maps); | |
985 | else { | |
986 | kfree(new_dev_maps); | |
987 | rcu_assign_pointer(dev->xps_maps, NULL); | |
988 | } | |
989 | ||
990 | if (dev_maps) | |
991 | call_rcu(&dev_maps->rcu, xps_dev_maps_release); | |
992 | ||
993 | mutex_unlock(&xps_map_mutex); | |
994 | ||
995 | free_cpumask_var(mask); | |
996 | return len; | |
997 | ||
998 | error: | |
999 | mutex_unlock(&xps_map_mutex); | |
1000 | ||
1001 | if (new_dev_maps) | |
1002 | for_each_possible_cpu(i) | |
1003 | kfree(new_dev_maps->cpu_map[i]); | |
1004 | kfree(new_dev_maps); | |
1005 | free_cpumask_var(mask); | |
1006 | return -ENOMEM; | |
1007 | } | |
1008 | ||
1009 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1010 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
1011 | ||
1012 | static struct attribute *netdev_queue_default_attrs[] = { | |
1013 | &xps_cpus_attribute.attr, | |
1014 | NULL | |
1015 | }; | |
1016 | ||
1017 | static void netdev_queue_release(struct kobject *kobj) | |
1018 | { | |
1019 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1020 | struct net_device *dev = queue->dev; | |
1021 | struct xps_dev_maps *dev_maps; | |
1022 | struct xps_map *map; | |
1023 | unsigned long index; | |
1024 | int i, pos, nonempty = 0; | |
1025 | ||
1026 | index = get_netdev_queue_index(queue); | |
1027 | ||
1028 | mutex_lock(&xps_map_mutex); | |
1029 | dev_maps = dev->xps_maps; | |
1030 | ||
1031 | if (dev_maps) { | |
1032 | for_each_possible_cpu(i) { | |
1033 | map = dev_maps->cpu_map[i]; | |
1034 | if (!map) | |
1035 | continue; | |
1036 | ||
1037 | for (pos = 0; pos < map->len; pos++) | |
1038 | if (map->queues[pos] == index) | |
1039 | break; | |
1040 | ||
1041 | if (pos < map->len) { | |
1042 | if (map->len > 1) | |
1043 | map->queues[pos] = | |
1044 | map->queues[--map->len]; | |
1045 | else { | |
1046 | RCU_INIT_POINTER(dev_maps->cpu_map[i], | |
1047 | NULL); | |
1048 | call_rcu(&map->rcu, xps_map_release); | |
1049 | map = NULL; | |
1050 | } | |
1051 | } | |
1052 | if (map) | |
1053 | nonempty = 1; | |
1054 | } | |
1055 | ||
1056 | if (!nonempty) { | |
1057 | RCU_INIT_POINTER(dev->xps_maps, NULL); | |
1058 | call_rcu(&dev_maps->rcu, xps_dev_maps_release); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | mutex_unlock(&xps_map_mutex); | |
1063 | ||
1064 | memset(kobj, 0, sizeof(*kobj)); | |
1065 | dev_put(queue->dev); | |
1066 | } | |
1067 | ||
1068 | static struct kobj_type netdev_queue_ktype = { | |
1069 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1070 | .release = netdev_queue_release, | |
1071 | .default_attrs = netdev_queue_default_attrs, | |
1072 | }; | |
1073 | ||
1074 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1075 | { | |
1076 | struct netdev_queue *queue = net->_tx + index; | |
1077 | struct kobject *kobj = &queue->kobj; | |
1078 | int error = 0; | |
1079 | ||
1080 | kobj->kset = net->queues_kset; | |
1081 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1082 | "tx-%u", index); | |
1083 | if (error) { | |
1084 | kobject_put(kobj); | |
1085 | return error; | |
1086 | } | |
1087 | ||
1088 | kobject_uevent(kobj, KOBJ_ADD); | |
1089 | dev_hold(queue->dev); | |
1090 | ||
1091 | return error; | |
1092 | } | |
1093 | ||
1094 | int | |
1095 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1096 | { | |
1097 | int i; | |
1098 | int error = 0; | |
1099 | ||
1100 | for (i = old_num; i < new_num; i++) { | |
1101 | error = netdev_queue_add_kobject(net, i); | |
1102 | if (error) { | |
1103 | new_num = old_num; | |
1104 | break; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | while (--i >= new_num) | |
1109 | kobject_put(&net->_tx[i].kobj); | |
1110 | ||
1111 | return error; | |
1112 | } | |
1113 | ||
1114 | static int register_queue_kobjects(struct net_device *net) | |
1115 | { | |
1116 | int error = 0, txq = 0, rxq = 0; | |
1117 | ||
62fe0b40 BH |
1118 | net->queues_kset = kset_create_and_add("queues", |
1119 | NULL, &net->dev.kobj); | |
1120 | if (!net->queues_kset) | |
1121 | return -ENOMEM; | |
1d24eb48 TH |
1122 | |
1123 | error = net_rx_queue_update_kobjects(net, 0, net->real_num_rx_queues); | |
1124 | if (error) | |
1125 | goto error; | |
1126 | rxq = net->real_num_rx_queues; | |
1127 | ||
1128 | error = netdev_queue_update_kobjects(net, 0, | |
1129 | net->real_num_tx_queues); | |
1130 | if (error) | |
1131 | goto error; | |
1132 | txq = net->real_num_tx_queues; | |
1133 | ||
1134 | return 0; | |
1135 | ||
1136 | error: | |
1137 | netdev_queue_update_kobjects(net, txq, 0); | |
1138 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1139 | return error; | |
62fe0b40 | 1140 | } |
0a9627f2 | 1141 | |
1d24eb48 | 1142 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 BH |
1143 | { |
1144 | net_rx_queue_update_kobjects(net, net->real_num_rx_queues, 0); | |
1d24eb48 | 1145 | netdev_queue_update_kobjects(net, net->real_num_tx_queues, 0); |
0a9627f2 TH |
1146 | kset_unregister(net->queues_kset); |
1147 | } | |
30bde1f5 | 1148 | #endif /* CONFIG_RPS */ |
608b4b95 EB |
1149 | |
1150 | static const void *net_current_ns(void) | |
1151 | { | |
1152 | return current->nsproxy->net_ns; | |
1153 | } | |
1154 | ||
1155 | static const void *net_initial_ns(void) | |
1156 | { | |
1157 | return &init_net; | |
1158 | } | |
1159 | ||
1160 | static const void *net_netlink_ns(struct sock *sk) | |
1161 | { | |
1162 | return sock_net(sk); | |
1163 | } | |
1164 | ||
04600794 | 1165 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 EB |
1166 | .type = KOBJ_NS_TYPE_NET, |
1167 | .current_ns = net_current_ns, | |
1168 | .netlink_ns = net_netlink_ns, | |
1169 | .initial_ns = net_initial_ns, | |
1170 | }; | |
04600794 | 1171 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 EB |
1172 | |
1173 | static void net_kobj_ns_exit(struct net *net) | |
1174 | { | |
1175 | kobj_ns_exit(KOBJ_NS_TYPE_NET, net); | |
1176 | } | |
1177 | ||
d6523ddf | 1178 | static struct pernet_operations kobj_net_ops = { |
608b4b95 EB |
1179 | .exit = net_kobj_ns_exit, |
1180 | }; | |
1181 | ||
8b41d188 | 1182 | |
1da177e4 | 1183 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 1184 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1185 | { |
43cb76d9 | 1186 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1187 | int retval; |
1da177e4 | 1188 | |
312c004d | 1189 | /* pass interface to uevent. */ |
7eff2e7a | 1190 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1191 | if (retval) |
1192 | goto exit; | |
ca2f37db JT |
1193 | |
1194 | /* pass ifindex to uevent. | |
1195 | * ifindex is useful as it won't change (interface name may change) | |
1196 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1197 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1198 | |
bf62456e | 1199 | exit: |
bf62456e | 1200 | return retval; |
1da177e4 LT |
1201 | } |
1202 | #endif | |
1203 | ||
1204 | /* | |
4ec93edb | 1205 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1206 | * Called when last reference to device kobject is gone. |
1da177e4 | 1207 | */ |
43cb76d9 | 1208 | static void netdev_release(struct device *d) |
1da177e4 | 1209 | { |
43cb76d9 | 1210 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1211 | |
1212 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1213 | ||
0b815a1a | 1214 | kfree(dev->ifalias); |
1da177e4 LT |
1215 | kfree((char *)dev - dev->padded); |
1216 | } | |
1217 | ||
608b4b95 EB |
1218 | static const void *net_namespace(struct device *d) |
1219 | { | |
1220 | struct net_device *dev; | |
1221 | dev = container_of(d, struct net_device, dev); | |
1222 | return dev_net(dev); | |
1223 | } | |
1224 | ||
1da177e4 LT |
1225 | static struct class net_class = { |
1226 | .name = "net", | |
43cb76d9 | 1227 | .dev_release = netdev_release, |
8b41d188 | 1228 | #ifdef CONFIG_SYSFS |
43cb76d9 | 1229 | .dev_attrs = net_class_attributes, |
8b41d188 | 1230 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1231 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 1232 | .dev_uevent = netdev_uevent, |
1da177e4 | 1233 | #endif |
608b4b95 EB |
1234 | .ns_type = &net_ns_type_operations, |
1235 | .namespace = net_namespace, | |
1da177e4 LT |
1236 | }; |
1237 | ||
9093bbb2 SH |
1238 | /* Delete sysfs entries but hold kobject reference until after all |
1239 | * netdev references are gone. | |
1240 | */ | |
8b41d188 | 1241 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1242 | { |
9093bbb2 SH |
1243 | struct device *dev = &(net->dev); |
1244 | ||
1245 | kobject_get(&dev->kobj); | |
3891845e | 1246 | |
30bde1f5 | 1247 | #ifdef CONFIG_RPS |
1d24eb48 | 1248 | remove_queue_kobjects(net); |
e880eb6c | 1249 | #endif |
0a9627f2 | 1250 | |
9093bbb2 | 1251 | device_del(dev); |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1255 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1256 | { |
43cb76d9 | 1257 | struct device *dev = &(net->dev); |
a4dbd674 | 1258 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1259 | int error = 0; |
1da177e4 | 1260 | |
a1b3f594 | 1261 | device_initialize(dev); |
43cb76d9 GKH |
1262 | dev->class = &net_class; |
1263 | dev->platform_data = net; | |
1264 | dev->groups = groups; | |
1da177e4 | 1265 | |
a2205472 | 1266 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1267 | |
8b41d188 | 1268 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1269 | /* Allow for a device specific group */ |
1270 | if (*groups) | |
1271 | groups++; | |
1da177e4 | 1272 | |
0c509a6c | 1273 | *groups++ = &netstat_group; |
22bb1be4 | 1274 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 1275 | if (net->ieee80211_ptr) |
fe9925b5 | 1276 | *groups++ = &wireless_group; |
3d23e349 JB |
1277 | #ifdef CONFIG_WIRELESS_EXT |
1278 | else if (net->wireless_handlers) | |
1279 | *groups++ = &wireless_group; | |
1280 | #endif | |
1da177e4 | 1281 | #endif |
8b41d188 | 1282 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1283 | |
0a9627f2 TH |
1284 | error = device_add(dev); |
1285 | if (error) | |
1286 | return error; | |
1287 | ||
30bde1f5 | 1288 | #ifdef CONFIG_RPS |
1d24eb48 | 1289 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1290 | if (error) { |
1291 | device_del(dev); | |
1292 | return error; | |
1293 | } | |
e880eb6c | 1294 | #endif |
0a9627f2 TH |
1295 | |
1296 | return error; | |
1da177e4 LT |
1297 | } |
1298 | ||
b8a9787e JV |
1299 | int netdev_class_create_file(struct class_attribute *class_attr) |
1300 | { | |
1301 | return class_create_file(&net_class, class_attr); | |
1302 | } | |
9e34a5b5 | 1303 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
1304 | |
1305 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
1306 | { | |
1307 | class_remove_file(&net_class, class_attr); | |
1308 | } | |
b8a9787e JV |
1309 | EXPORT_SYMBOL(netdev_class_remove_file); |
1310 | ||
8b41d188 | 1311 | int netdev_kobject_init(void) |
1da177e4 | 1312 | { |
608b4b95 | 1313 | kobj_ns_type_register(&net_ns_type_operations); |
d6523ddf | 1314 | register_pernet_subsys(&kobj_net_ops); |
1da177e4 LT |
1315 | return class_register(&net_class); |
1316 | } |