Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
4ec93edb | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/if_arp.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
608b4b95 | 17 | #include <linux/nsproxy.h> |
1da177e4 | 18 | #include <net/sock.h> |
608b4b95 | 19 | #include <net/net_namespace.h> |
1da177e4 LT |
20 | #include <linux/rtnetlink.h> |
21 | #include <linux/wireless.h> | |
fec5e652 | 22 | #include <linux/vmalloc.h> |
8f1546ca | 23 | #include <net/wext.h> |
1da177e4 | 24 | |
342709ef PE |
25 | #include "net-sysfs.h" |
26 | ||
8b41d188 | 27 | #ifdef CONFIG_SYSFS |
1da177e4 | 28 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 29 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 | 30 | static const char fmt_dec[] = "%d\n"; |
8ae6daca | 31 | static const char fmt_udec[] = "%u\n"; |
1da177e4 | 32 | static const char fmt_ulong[] = "%lu\n"; |
be1f3c2c | 33 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 34 | |
4ec93edb | 35 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 36 | { |
fe9925b5 | 37 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
38 | } |
39 | ||
40 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
41 | static ssize_t netdev_show(const struct device *dev, |
42 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
43 | ssize_t (*format)(const struct net_device *, char *)) |
44 | { | |
43cb76d9 | 45 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
46 | ssize_t ret = -EINVAL; |
47 | ||
48 | read_lock(&dev_base_lock); | |
49 | if (dev_isalive(net)) | |
50 | ret = (*format)(net, buf); | |
51 | read_unlock(&dev_base_lock); | |
52 | ||
53 | return ret; | |
54 | } | |
55 | ||
56 | /* generate a show function for simple field */ | |
57 | #define NETDEVICE_SHOW(field, format_string) \ | |
58 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
59 | { \ | |
60 | return sprintf(buf, format_string, net->field); \ | |
61 | } \ | |
43cb76d9 GKH |
62 | static ssize_t show_##field(struct device *dev, \ |
63 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 64 | { \ |
43cb76d9 | 65 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
66 | } |
67 | ||
68 | ||
69 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 70 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
71 | const char *buf, size_t len, |
72 | int (*set)(struct net_device *, unsigned long)) | |
73 | { | |
74 | struct net_device *net = to_net_dev(dev); | |
75 | char *endp; | |
76 | unsigned long new; | |
77 | int ret = -EINVAL; | |
78 | ||
79 | if (!capable(CAP_NET_ADMIN)) | |
80 | return -EPERM; | |
81 | ||
82 | new = simple_strtoul(buf, &endp, 0); | |
83 | if (endp == buf) | |
84 | goto err; | |
85 | ||
5a5990d3 | 86 | if (!rtnl_trylock()) |
336ca57c | 87 | return restart_syscall(); |
5a5990d3 | 88 | |
1da177e4 LT |
89 | if (dev_isalive(net)) { |
90 | if ((ret = (*set)(net, new)) == 0) | |
91 | ret = len; | |
92 | } | |
93 | rtnl_unlock(); | |
94 | err: | |
95 | return ret; | |
96 | } | |
97 | ||
9d29672c | 98 | NETDEVICE_SHOW(dev_id, fmt_hex); |
c1f79426 | 99 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
fd586bac KS |
100 | NETDEVICE_SHOW(addr_len, fmt_dec); |
101 | NETDEVICE_SHOW(iflink, fmt_dec); | |
102 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
fd586bac | 103 | NETDEVICE_SHOW(type, fmt_dec); |
b00055aa | 104 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
105 | |
106 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
107 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
108 | char *buf) | |
1da177e4 LT |
109 | { |
110 | struct net_device *net = to_net_dev(dev); | |
111 | ssize_t ret = -EINVAL; | |
112 | ||
113 | read_lock(&dev_base_lock); | |
114 | if (dev_isalive(net)) | |
7ffc49a6 | 115 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
116 | read_unlock(&dev_base_lock); |
117 | return ret; | |
118 | } | |
119 | ||
43cb76d9 GKH |
120 | static ssize_t show_broadcast(struct device *dev, |
121 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
122 | { |
123 | struct net_device *net = to_net_dev(dev); | |
124 | if (dev_isalive(net)) | |
7ffc49a6 | 125 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
126 | return -EINVAL; |
127 | } | |
128 | ||
43cb76d9 GKH |
129 | static ssize_t show_carrier(struct device *dev, |
130 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
131 | { |
132 | struct net_device *netdev = to_net_dev(dev); | |
133 | if (netif_running(netdev)) { | |
134 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
135 | } | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
d519e17e AG |
139 | static ssize_t show_speed(struct device *dev, |
140 | struct device_attribute *attr, char *buf) | |
141 | { | |
142 | struct net_device *netdev = to_net_dev(dev); | |
143 | int ret = -EINVAL; | |
144 | ||
145 | if (!rtnl_trylock()) | |
146 | return restart_syscall(); | |
147 | ||
8ae6daca DD |
148 | if (netif_running(netdev)) { |
149 | struct ethtool_cmd cmd; | |
150 | if (!dev_ethtool_get_settings(netdev, &cmd)) | |
151 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); | |
d519e17e AG |
152 | } |
153 | rtnl_unlock(); | |
154 | return ret; | |
155 | } | |
156 | ||
157 | static ssize_t show_duplex(struct device *dev, | |
158 | struct device_attribute *attr, char *buf) | |
159 | { | |
160 | struct net_device *netdev = to_net_dev(dev); | |
161 | int ret = -EINVAL; | |
162 | ||
163 | if (!rtnl_trylock()) | |
164 | return restart_syscall(); | |
165 | ||
8ae6daca DD |
166 | if (netif_running(netdev)) { |
167 | struct ethtool_cmd cmd; | |
168 | if (!dev_ethtool_get_settings(netdev, &cmd)) | |
169 | ret = sprintf(buf, "%s\n", | |
170 | cmd.duplex ? "full" : "half"); | |
d519e17e AG |
171 | } |
172 | rtnl_unlock(); | |
173 | return ret; | |
174 | } | |
175 | ||
43cb76d9 GKH |
176 | static ssize_t show_dormant(struct device *dev, |
177 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
178 | { |
179 | struct net_device *netdev = to_net_dev(dev); | |
180 | ||
181 | if (netif_running(netdev)) | |
182 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
183 | ||
184 | return -EINVAL; | |
185 | } | |
186 | ||
36cbd3dc | 187 | static const char *const operstates[] = { |
b00055aa SR |
188 | "unknown", |
189 | "notpresent", /* currently unused */ | |
190 | "down", | |
191 | "lowerlayerdown", | |
192 | "testing", /* currently unused */ | |
193 | "dormant", | |
194 | "up" | |
195 | }; | |
196 | ||
43cb76d9 GKH |
197 | static ssize_t show_operstate(struct device *dev, |
198 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
199 | { |
200 | const struct net_device *netdev = to_net_dev(dev); | |
201 | unsigned char operstate; | |
202 | ||
203 | read_lock(&dev_base_lock); | |
204 | operstate = netdev->operstate; | |
205 | if (!netif_running(netdev)) | |
206 | operstate = IF_OPER_DOWN; | |
207 | read_unlock(&dev_base_lock); | |
208 | ||
e3a5cd9e | 209 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
210 | return -EINVAL; /* should not happen */ |
211 | ||
212 | return sprintf(buf, "%s\n", operstates[operstate]); | |
213 | } | |
214 | ||
1da177e4 LT |
215 | /* read-write attributes */ |
216 | NETDEVICE_SHOW(mtu, fmt_dec); | |
217 | ||
218 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
219 | { | |
220 | return dev_set_mtu(net, (int) new_mtu); | |
221 | } | |
222 | ||
43cb76d9 GKH |
223 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
224 | const char *buf, size_t len) | |
1da177e4 | 225 | { |
43cb76d9 | 226 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
227 | } |
228 | ||
1da177e4 LT |
229 | NETDEVICE_SHOW(flags, fmt_hex); |
230 | ||
231 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
232 | { | |
233 | return dev_change_flags(net, (unsigned) new_flags); | |
234 | } | |
235 | ||
43cb76d9 GKH |
236 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
237 | const char *buf, size_t len) | |
1da177e4 | 238 | { |
43cb76d9 | 239 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
240 | } |
241 | ||
1da177e4 LT |
242 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
243 | ||
244 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
245 | { | |
246 | net->tx_queue_len = new_len; | |
247 | return 0; | |
248 | } | |
249 | ||
43cb76d9 GKH |
250 | static ssize_t store_tx_queue_len(struct device *dev, |
251 | struct device_attribute *attr, | |
252 | const char *buf, size_t len) | |
1da177e4 | 253 | { |
43cb76d9 | 254 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
255 | } |
256 | ||
0b815a1a SH |
257 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
258 | const char *buf, size_t len) | |
259 | { | |
260 | struct net_device *netdev = to_net_dev(dev); | |
261 | size_t count = len; | |
262 | ssize_t ret; | |
263 | ||
264 | if (!capable(CAP_NET_ADMIN)) | |
265 | return -EPERM; | |
266 | ||
267 | /* ignore trailing newline */ | |
268 | if (len > 0 && buf[len - 1] == '\n') | |
269 | --count; | |
270 | ||
336ca57c EB |
271 | if (!rtnl_trylock()) |
272 | return restart_syscall(); | |
0b815a1a SH |
273 | ret = dev_set_alias(netdev, buf, count); |
274 | rtnl_unlock(); | |
275 | ||
276 | return ret < 0 ? ret : len; | |
277 | } | |
278 | ||
279 | static ssize_t show_ifalias(struct device *dev, | |
280 | struct device_attribute *attr, char *buf) | |
281 | { | |
282 | const struct net_device *netdev = to_net_dev(dev); | |
283 | ssize_t ret = 0; | |
284 | ||
336ca57c EB |
285 | if (!rtnl_trylock()) |
286 | return restart_syscall(); | |
0b815a1a SH |
287 | if (netdev->ifalias) |
288 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
289 | rtnl_unlock(); | |
290 | return ret; | |
291 | } | |
292 | ||
a512b92b VD |
293 | NETDEVICE_SHOW(group, fmt_dec); |
294 | ||
295 | static int change_group(struct net_device *net, unsigned long new_group) | |
296 | { | |
297 | dev_set_group(net, (int) new_group); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | static ssize_t store_group(struct device *dev, struct device_attribute *attr, | |
302 | const char *buf, size_t len) | |
303 | { | |
304 | return netdev_store(dev, attr, buf, len, change_group); | |
305 | } | |
306 | ||
43cb76d9 | 307 | static struct device_attribute net_class_attributes[] = { |
c1f79426 | 308 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
fd586bac | 309 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 310 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 311 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
312 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
313 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
fd586bac | 314 | __ATTR(type, S_IRUGO, show_type, NULL), |
b00055aa | 315 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
316 | __ATTR(address, S_IRUGO, show_address, NULL), |
317 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
318 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
319 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
320 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
321 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
322 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
323 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
324 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
325 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
326 | store_tx_queue_len), | |
b6644cb7 | 327 | __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), |
fd586bac | 328 | {} |
1da177e4 LT |
329 | }; |
330 | ||
331 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
332 | static ssize_t netstat_show(const struct device *d, |
333 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
334 | unsigned long offset) |
335 | { | |
43cb76d9 | 336 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
337 | ssize_t ret = -EINVAL; |
338 | ||
be1f3c2c BH |
339 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
340 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
341 | |
342 | read_lock(&dev_base_lock); | |
96e74088 | 343 | if (dev_isalive(dev)) { |
28172739 ED |
344 | struct rtnl_link_stats64 temp; |
345 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
346 | ||
be1f3c2c | 347 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 348 | } |
1da177e4 LT |
349 | read_unlock(&dev_base_lock); |
350 | return ret; | |
351 | } | |
352 | ||
353 | /* generate a read-only statistics attribute */ | |
354 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
355 | static ssize_t show_##name(struct device *d, \ |
356 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 357 | { \ |
43cb76d9 | 358 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 359 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 360 | } \ |
43cb76d9 | 361 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
362 | |
363 | NETSTAT_ENTRY(rx_packets); | |
364 | NETSTAT_ENTRY(tx_packets); | |
365 | NETSTAT_ENTRY(rx_bytes); | |
366 | NETSTAT_ENTRY(tx_bytes); | |
367 | NETSTAT_ENTRY(rx_errors); | |
368 | NETSTAT_ENTRY(tx_errors); | |
369 | NETSTAT_ENTRY(rx_dropped); | |
370 | NETSTAT_ENTRY(tx_dropped); | |
371 | NETSTAT_ENTRY(multicast); | |
372 | NETSTAT_ENTRY(collisions); | |
373 | NETSTAT_ENTRY(rx_length_errors); | |
374 | NETSTAT_ENTRY(rx_over_errors); | |
375 | NETSTAT_ENTRY(rx_crc_errors); | |
376 | NETSTAT_ENTRY(rx_frame_errors); | |
377 | NETSTAT_ENTRY(rx_fifo_errors); | |
378 | NETSTAT_ENTRY(rx_missed_errors); | |
379 | NETSTAT_ENTRY(tx_aborted_errors); | |
380 | NETSTAT_ENTRY(tx_carrier_errors); | |
381 | NETSTAT_ENTRY(tx_fifo_errors); | |
382 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
383 | NETSTAT_ENTRY(tx_window_errors); | |
384 | NETSTAT_ENTRY(rx_compressed); | |
385 | NETSTAT_ENTRY(tx_compressed); | |
386 | ||
387 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
388 | &dev_attr_rx_packets.attr, |
389 | &dev_attr_tx_packets.attr, | |
390 | &dev_attr_rx_bytes.attr, | |
391 | &dev_attr_tx_bytes.attr, | |
392 | &dev_attr_rx_errors.attr, | |
393 | &dev_attr_tx_errors.attr, | |
394 | &dev_attr_rx_dropped.attr, | |
395 | &dev_attr_tx_dropped.attr, | |
396 | &dev_attr_multicast.attr, | |
397 | &dev_attr_collisions.attr, | |
398 | &dev_attr_rx_length_errors.attr, | |
399 | &dev_attr_rx_over_errors.attr, | |
400 | &dev_attr_rx_crc_errors.attr, | |
401 | &dev_attr_rx_frame_errors.attr, | |
402 | &dev_attr_rx_fifo_errors.attr, | |
403 | &dev_attr_rx_missed_errors.attr, | |
404 | &dev_attr_tx_aborted_errors.attr, | |
405 | &dev_attr_tx_carrier_errors.attr, | |
406 | &dev_attr_tx_fifo_errors.attr, | |
407 | &dev_attr_tx_heartbeat_errors.attr, | |
408 | &dev_attr_tx_window_errors.attr, | |
409 | &dev_attr_rx_compressed.attr, | |
410 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
411 | NULL |
412 | }; | |
413 | ||
414 | ||
415 | static struct attribute_group netstat_group = { | |
416 | .name = "statistics", | |
417 | .attrs = netstat_attrs, | |
418 | }; | |
419 | ||
22bb1be4 | 420 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 421 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 422 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
423 | ssize_t (*format)(const struct iw_statistics *, |
424 | char *)) | |
425 | { | |
43cb76d9 | 426 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 427 | const struct iw_statistics *iw; |
1da177e4 | 428 | ssize_t ret = -EINVAL; |
4ec93edb | 429 | |
b8afe641 EB |
430 | if (!rtnl_trylock()) |
431 | return restart_syscall(); | |
6dd214b5 | 432 | if (dev_isalive(dev)) { |
8f1546ca JB |
433 | iw = get_wireless_stats(dev); |
434 | if (iw) | |
6dd214b5 AB |
435 | ret = (*format)(iw, buf); |
436 | } | |
a160ee69 | 437 | rtnl_unlock(); |
1da177e4 LT |
438 | |
439 | return ret; | |
440 | } | |
441 | ||
442 | /* show function template for wireless fields */ | |
443 | #define WIRELESS_SHOW(name, field, format_string) \ | |
444 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
445 | { \ | |
446 | return sprintf(buf, format_string, iw->field); \ | |
447 | } \ | |
43cb76d9 GKH |
448 | static ssize_t show_iw_##name(struct device *d, \ |
449 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 450 | { \ |
43cb76d9 | 451 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 452 | } \ |
43cb76d9 | 453 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
454 | |
455 | WIRELESS_SHOW(status, status, fmt_hex); | |
456 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
457 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
458 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
459 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
460 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
461 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
462 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
463 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
464 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
465 | ||
466 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
467 | &dev_attr_status.attr, |
468 | &dev_attr_link.attr, | |
469 | &dev_attr_level.attr, | |
470 | &dev_attr_noise.attr, | |
471 | &dev_attr_nwid.attr, | |
472 | &dev_attr_crypt.attr, | |
473 | &dev_attr_fragment.attr, | |
474 | &dev_attr_retries.attr, | |
475 | &dev_attr_misc.attr, | |
476 | &dev_attr_beacon.attr, | |
1da177e4 LT |
477 | NULL |
478 | }; | |
479 | ||
480 | static struct attribute_group wireless_group = { | |
481 | .name = "wireless", | |
482 | .attrs = wireless_attrs, | |
483 | }; | |
484 | #endif | |
d6523ddf | 485 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 486 | |
30bde1f5 | 487 | #ifdef CONFIG_RPS |
0a9627f2 TH |
488 | /* |
489 | * RX queue sysfs structures and functions. | |
490 | */ | |
491 | struct rx_queue_attribute { | |
492 | struct attribute attr; | |
493 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
494 | struct rx_queue_attribute *attr, char *buf); | |
495 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
496 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
497 | }; | |
498 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
499 | struct rx_queue_attribute, attr) | |
500 | ||
501 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
502 | ||
503 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
504 | char *buf) | |
505 | { | |
506 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
507 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
508 | ||
509 | if (!attribute->show) | |
510 | return -EIO; | |
511 | ||
512 | return attribute->show(queue, attribute, buf); | |
513 | } | |
514 | ||
515 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
516 | const char *buf, size_t count) | |
517 | { | |
518 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
519 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
520 | ||
521 | if (!attribute->store) | |
522 | return -EIO; | |
523 | ||
524 | return attribute->store(queue, attribute, buf, count); | |
525 | } | |
526 | ||
fa50d645 | 527 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
528 | .show = rx_queue_attr_show, |
529 | .store = rx_queue_attr_store, | |
530 | }; | |
531 | ||
532 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
533 | struct rx_queue_attribute *attribute, char *buf) | |
534 | { | |
535 | struct rps_map *map; | |
536 | cpumask_var_t mask; | |
537 | size_t len = 0; | |
538 | int i; | |
539 | ||
540 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
541 | return -ENOMEM; | |
542 | ||
543 | rcu_read_lock(); | |
544 | map = rcu_dereference(queue->rps_map); | |
545 | if (map) | |
546 | for (i = 0; i < map->len; i++) | |
547 | cpumask_set_cpu(map->cpus[i], mask); | |
548 | ||
549 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
550 | if (PAGE_SIZE - len < 3) { | |
551 | rcu_read_unlock(); | |
552 | free_cpumask_var(mask); | |
553 | return -EINVAL; | |
554 | } | |
555 | rcu_read_unlock(); | |
556 | ||
557 | free_cpumask_var(mask); | |
558 | len += sprintf(buf + len, "\n"); | |
559 | return len; | |
560 | } | |
561 | ||
f5acb907 | 562 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
563 | struct rx_queue_attribute *attribute, |
564 | const char *buf, size_t len) | |
565 | { | |
566 | struct rps_map *old_map, *map; | |
567 | cpumask_var_t mask; | |
568 | int err, cpu, i; | |
569 | static DEFINE_SPINLOCK(rps_map_lock); | |
570 | ||
571 | if (!capable(CAP_NET_ADMIN)) | |
572 | return -EPERM; | |
573 | ||
574 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
575 | return -ENOMEM; | |
576 | ||
577 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
578 | if (err) { | |
579 | free_cpumask_var(mask); | |
580 | return err; | |
581 | } | |
582 | ||
583 | map = kzalloc(max_t(unsigned, | |
584 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
585 | GFP_KERNEL); | |
586 | if (!map) { | |
587 | free_cpumask_var(mask); | |
588 | return -ENOMEM; | |
589 | } | |
590 | ||
591 | i = 0; | |
592 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
593 | map->cpus[i++] = cpu; | |
594 | ||
595 | if (i) | |
596 | map->len = i; | |
597 | else { | |
598 | kfree(map); | |
599 | map = NULL; | |
600 | } | |
601 | ||
602 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
603 | old_map = rcu_dereference_protected(queue->rps_map, |
604 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
605 | rcu_assign_pointer(queue->rps_map, map); |
606 | spin_unlock(&rps_map_lock); | |
607 | ||
608 | if (old_map) | |
f6f80238 | 609 | kfree_rcu(old_map, rcu); |
0a9627f2 TH |
610 | |
611 | free_cpumask_var(mask); | |
612 | return len; | |
613 | } | |
614 | ||
fec5e652 TH |
615 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
616 | struct rx_queue_attribute *attr, | |
617 | char *buf) | |
618 | { | |
619 | struct rps_dev_flow_table *flow_table; | |
620 | unsigned int val = 0; | |
621 | ||
622 | rcu_read_lock(); | |
623 | flow_table = rcu_dereference(queue->rps_flow_table); | |
624 | if (flow_table) | |
625 | val = flow_table->mask + 1; | |
626 | rcu_read_unlock(); | |
627 | ||
628 | return sprintf(buf, "%u\n", val); | |
629 | } | |
630 | ||
631 | static void rps_dev_flow_table_release_work(struct work_struct *work) | |
632 | { | |
633 | struct rps_dev_flow_table *table = container_of(work, | |
634 | struct rps_dev_flow_table, free_work); | |
635 | ||
636 | vfree(table); | |
637 | } | |
638 | ||
639 | static void rps_dev_flow_table_release(struct rcu_head *rcu) | |
640 | { | |
641 | struct rps_dev_flow_table *table = container_of(rcu, | |
642 | struct rps_dev_flow_table, rcu); | |
643 | ||
644 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); | |
645 | schedule_work(&table->free_work); | |
646 | } | |
647 | ||
f5acb907 | 648 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
649 | struct rx_queue_attribute *attr, |
650 | const char *buf, size_t len) | |
651 | { | |
652 | unsigned int count; | |
653 | char *endp; | |
654 | struct rps_dev_flow_table *table, *old_table; | |
655 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
656 | ||
657 | if (!capable(CAP_NET_ADMIN)) | |
658 | return -EPERM; | |
659 | ||
660 | count = simple_strtoul(buf, &endp, 0); | |
661 | if (endp == buf) | |
662 | return -EINVAL; | |
663 | ||
664 | if (count) { | |
665 | int i; | |
666 | ||
667 | if (count > 1<<30) { | |
668 | /* Enforce a limit to prevent overflow */ | |
669 | return -EINVAL; | |
670 | } | |
671 | count = roundup_pow_of_two(count); | |
672 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count)); | |
673 | if (!table) | |
674 | return -ENOMEM; | |
675 | ||
676 | table->mask = count - 1; | |
677 | for (i = 0; i < count; i++) | |
678 | table->flows[i].cpu = RPS_NO_CPU; | |
679 | } else | |
680 | table = NULL; | |
681 | ||
682 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
683 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
684 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
685 | rcu_assign_pointer(queue->rps_flow_table, table); |
686 | spin_unlock(&rps_dev_flow_lock); | |
687 | ||
688 | if (old_table) | |
689 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
690 | ||
691 | return len; | |
692 | } | |
693 | ||
0a9627f2 TH |
694 | static struct rx_queue_attribute rps_cpus_attribute = |
695 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
696 | ||
fec5e652 TH |
697 | |
698 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
699 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
700 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
701 | ||
0a9627f2 TH |
702 | static struct attribute *rx_queue_default_attrs[] = { |
703 | &rps_cpus_attribute.attr, | |
fec5e652 | 704 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
705 | NULL |
706 | }; | |
707 | ||
708 | static void rx_queue_release(struct kobject *kobj) | |
709 | { | |
710 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
6e3f7faf ED |
711 | struct rps_map *map; |
712 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 713 | |
fec5e652 | 714 | |
33d480ce | 715 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
716 | if (map) { |
717 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 718 | kfree_rcu(map, rcu); |
9ea19481 | 719 | } |
6e3f7faf | 720 | |
33d480ce | 721 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
722 | if (flow_table) { |
723 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 724 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 725 | } |
0a9627f2 | 726 | |
9ea19481 | 727 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 728 | dev_put(queue->dev); |
0a9627f2 TH |
729 | } |
730 | ||
731 | static struct kobj_type rx_queue_ktype = { | |
732 | .sysfs_ops = &rx_queue_sysfs_ops, | |
733 | .release = rx_queue_release, | |
734 | .default_attrs = rx_queue_default_attrs, | |
735 | }; | |
736 | ||
737 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
738 | { | |
739 | struct netdev_rx_queue *queue = net->_rx + index; | |
740 | struct kobject *kobj = &queue->kobj; | |
741 | int error = 0; | |
742 | ||
743 | kobj->kset = net->queues_kset; | |
744 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
745 | "rx-%u", index); | |
746 | if (error) { | |
747 | kobject_put(kobj); | |
748 | return error; | |
749 | } | |
750 | ||
751 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 752 | dev_hold(queue->dev); |
0a9627f2 TH |
753 | |
754 | return error; | |
755 | } | |
bf264145 | 756 | #endif /* CONFIG_RPS */ |
0a9627f2 | 757 | |
62fe0b40 BH |
758 | int |
759 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 760 | { |
bf264145 | 761 | #ifdef CONFIG_RPS |
0a9627f2 TH |
762 | int i; |
763 | int error = 0; | |
764 | ||
62fe0b40 | 765 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 766 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
767 | if (error) { |
768 | new_num = old_num; | |
0a9627f2 | 769 | break; |
62fe0b40 | 770 | } |
0a9627f2 TH |
771 | } |
772 | ||
62fe0b40 BH |
773 | while (--i >= new_num) |
774 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
775 | |
776 | return error; | |
bf264145 TH |
777 | #else |
778 | return 0; | |
779 | #endif | |
0a9627f2 TH |
780 | } |
781 | ||
bf264145 | 782 | #ifdef CONFIG_XPS |
1d24eb48 TH |
783 | /* |
784 | * netdev_queue sysfs structures and functions. | |
785 | */ | |
786 | struct netdev_queue_attribute { | |
787 | struct attribute attr; | |
788 | ssize_t (*show)(struct netdev_queue *queue, | |
789 | struct netdev_queue_attribute *attr, char *buf); | |
790 | ssize_t (*store)(struct netdev_queue *queue, | |
791 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
792 | }; | |
793 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
794 | struct netdev_queue_attribute, attr) | |
795 | ||
796 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
797 | ||
798 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
799 | struct attribute *attr, char *buf) | |
800 | { | |
801 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
802 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
803 | ||
804 | if (!attribute->show) | |
805 | return -EIO; | |
806 | ||
807 | return attribute->show(queue, attribute, buf); | |
808 | } | |
809 | ||
810 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
811 | struct attribute *attr, | |
812 | const char *buf, size_t count) | |
813 | { | |
814 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
815 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
816 | ||
817 | if (!attribute->store) | |
818 | return -EIO; | |
819 | ||
820 | return attribute->store(queue, attribute, buf, count); | |
821 | } | |
822 | ||
823 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
824 | .show = netdev_queue_attr_show, | |
825 | .store = netdev_queue_attr_store, | |
826 | }; | |
827 | ||
828 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) | |
0a9627f2 | 829 | { |
1d24eb48 TH |
830 | struct net_device *dev = queue->dev; |
831 | int i; | |
832 | ||
833 | for (i = 0; i < dev->num_tx_queues; i++) | |
834 | if (queue == &dev->_tx[i]) | |
835 | break; | |
836 | ||
837 | BUG_ON(i >= dev->num_tx_queues); | |
838 | ||
839 | return i; | |
840 | } | |
841 | ||
842 | ||
843 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
844 | struct netdev_queue_attribute *attribute, char *buf) | |
845 | { | |
846 | struct net_device *dev = queue->dev; | |
847 | struct xps_dev_maps *dev_maps; | |
848 | cpumask_var_t mask; | |
849 | unsigned long index; | |
850 | size_t len = 0; | |
851 | int i; | |
852 | ||
853 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
854 | return -ENOMEM; | |
855 | ||
856 | index = get_netdev_queue_index(queue); | |
857 | ||
858 | rcu_read_lock(); | |
859 | dev_maps = rcu_dereference(dev->xps_maps); | |
860 | if (dev_maps) { | |
861 | for_each_possible_cpu(i) { | |
862 | struct xps_map *map = | |
863 | rcu_dereference(dev_maps->cpu_map[i]); | |
864 | if (map) { | |
865 | int j; | |
866 | for (j = 0; j < map->len; j++) { | |
867 | if (map->queues[j] == index) { | |
868 | cpumask_set_cpu(i, mask); | |
869 | break; | |
870 | } | |
871 | } | |
872 | } | |
873 | } | |
874 | } | |
875 | rcu_read_unlock(); | |
876 | ||
877 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
878 | if (PAGE_SIZE - len < 3) { | |
879 | free_cpumask_var(mask); | |
880 | return -EINVAL; | |
881 | } | |
882 | ||
883 | free_cpumask_var(mask); | |
884 | len += sprintf(buf + len, "\n"); | |
885 | return len; | |
886 | } | |
887 | ||
1d24eb48 | 888 | static DEFINE_MUTEX(xps_map_mutex); |
a4177869 ED |
889 | #define xmap_dereference(P) \ |
890 | rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex)) | |
1d24eb48 TH |
891 | |
892 | static ssize_t store_xps_map(struct netdev_queue *queue, | |
893 | struct netdev_queue_attribute *attribute, | |
894 | const char *buf, size_t len) | |
895 | { | |
896 | struct net_device *dev = queue->dev; | |
897 | cpumask_var_t mask; | |
898 | int err, i, cpu, pos, map_len, alloc_len, need_set; | |
899 | unsigned long index; | |
900 | struct xps_map *map, *new_map; | |
901 | struct xps_dev_maps *dev_maps, *new_dev_maps; | |
902 | int nonempty = 0; | |
f2cd2d3e | 903 | int numa_node = -2; |
1d24eb48 TH |
904 | |
905 | if (!capable(CAP_NET_ADMIN)) | |
906 | return -EPERM; | |
907 | ||
908 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
909 | return -ENOMEM; | |
910 | ||
911 | index = get_netdev_queue_index(queue); | |
912 | ||
913 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
914 | if (err) { | |
915 | free_cpumask_var(mask); | |
916 | return err; | |
917 | } | |
918 | ||
919 | new_dev_maps = kzalloc(max_t(unsigned, | |
920 | XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL); | |
921 | if (!new_dev_maps) { | |
922 | free_cpumask_var(mask); | |
923 | return -ENOMEM; | |
924 | } | |
925 | ||
926 | mutex_lock(&xps_map_mutex); | |
927 | ||
a4177869 | 928 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
929 | |
930 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
931 | map = dev_maps ? |
932 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
933 | new_map = map; | |
1d24eb48 TH |
934 | if (map) { |
935 | for (pos = 0; pos < map->len; pos++) | |
936 | if (map->queues[pos] == index) | |
937 | break; | |
938 | map_len = map->len; | |
939 | alloc_len = map->alloc_len; | |
940 | } else | |
941 | pos = map_len = alloc_len = 0; | |
942 | ||
2142c131 | 943 | need_set = cpumask_test_cpu(cpu, mask) && cpu_online(cpu); |
f2cd2d3e ED |
944 | #ifdef CONFIG_NUMA |
945 | if (need_set) { | |
946 | if (numa_node == -2) | |
947 | numa_node = cpu_to_node(cpu); | |
948 | else if (numa_node != cpu_to_node(cpu)) | |
949 | numa_node = -1; | |
950 | } | |
951 | #endif | |
1d24eb48 TH |
952 | if (need_set && pos >= map_len) { |
953 | /* Need to add queue to this CPU's map */ | |
954 | if (map_len >= alloc_len) { | |
955 | alloc_len = alloc_len ? | |
956 | 2 * alloc_len : XPS_MIN_MAP_ALLOC; | |
b02038a1 ED |
957 | new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len), |
958 | GFP_KERNEL, | |
959 | cpu_to_node(cpu)); | |
1d24eb48 TH |
960 | if (!new_map) |
961 | goto error; | |
962 | new_map->alloc_len = alloc_len; | |
963 | for (i = 0; i < map_len; i++) | |
964 | new_map->queues[i] = map->queues[i]; | |
965 | new_map->len = map_len; | |
966 | } | |
967 | new_map->queues[new_map->len++] = index; | |
968 | } else if (!need_set && pos < map_len) { | |
969 | /* Need to remove queue from this CPU's map */ | |
970 | if (map_len > 1) | |
971 | new_map->queues[pos] = | |
972 | new_map->queues[--new_map->len]; | |
973 | else | |
974 | new_map = NULL; | |
975 | } | |
a4177869 | 976 | RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map); |
1d24eb48 TH |
977 | } |
978 | ||
979 | /* Cleanup old maps */ | |
980 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
981 | map = dev_maps ? |
982 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
983 | if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map) | |
edc86d8a | 984 | kfree_rcu(map, rcu); |
1d24eb48 TH |
985 | if (new_dev_maps->cpu_map[cpu]) |
986 | nonempty = 1; | |
987 | } | |
988 | ||
989 | if (nonempty) | |
a9b3cd7f | 990 | RCU_INIT_POINTER(dev->xps_maps, new_dev_maps); |
1d24eb48 TH |
991 | else { |
992 | kfree(new_dev_maps); | |
a9b3cd7f | 993 | RCU_INIT_POINTER(dev->xps_maps, NULL); |
1d24eb48 TH |
994 | } |
995 | ||
996 | if (dev_maps) | |
b55071eb | 997 | kfree_rcu(dev_maps, rcu); |
1d24eb48 | 998 | |
b236da69 CG |
999 | netdev_queue_numa_node_write(queue, (numa_node >= 0) ? numa_node : |
1000 | NUMA_NO_NODE); | |
f2cd2d3e | 1001 | |
1d24eb48 TH |
1002 | mutex_unlock(&xps_map_mutex); |
1003 | ||
1004 | free_cpumask_var(mask); | |
1005 | return len; | |
1006 | ||
1007 | error: | |
1008 | mutex_unlock(&xps_map_mutex); | |
1009 | ||
1010 | if (new_dev_maps) | |
1011 | for_each_possible_cpu(i) | |
a4177869 ED |
1012 | kfree(rcu_dereference_protected( |
1013 | new_dev_maps->cpu_map[i], | |
1014 | 1)); | |
1d24eb48 TH |
1015 | kfree(new_dev_maps); |
1016 | free_cpumask_var(mask); | |
1017 | return -ENOMEM; | |
1018 | } | |
1019 | ||
1020 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1021 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
1022 | ||
1023 | static struct attribute *netdev_queue_default_attrs[] = { | |
1024 | &xps_cpus_attribute.attr, | |
1025 | NULL | |
1026 | }; | |
1027 | ||
1028 | static void netdev_queue_release(struct kobject *kobj) | |
1029 | { | |
1030 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1031 | struct net_device *dev = queue->dev; | |
1032 | struct xps_dev_maps *dev_maps; | |
1033 | struct xps_map *map; | |
1034 | unsigned long index; | |
1035 | int i, pos, nonempty = 0; | |
1036 | ||
1037 | index = get_netdev_queue_index(queue); | |
1038 | ||
1039 | mutex_lock(&xps_map_mutex); | |
a4177869 | 1040 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
1041 | |
1042 | if (dev_maps) { | |
1043 | for_each_possible_cpu(i) { | |
a4177869 | 1044 | map = xmap_dereference(dev_maps->cpu_map[i]); |
1d24eb48 TH |
1045 | if (!map) |
1046 | continue; | |
1047 | ||
1048 | for (pos = 0; pos < map->len; pos++) | |
1049 | if (map->queues[pos] == index) | |
1050 | break; | |
1051 | ||
1052 | if (pos < map->len) { | |
1053 | if (map->len > 1) | |
1054 | map->queues[pos] = | |
1055 | map->queues[--map->len]; | |
1056 | else { | |
1057 | RCU_INIT_POINTER(dev_maps->cpu_map[i], | |
1058 | NULL); | |
edc86d8a | 1059 | kfree_rcu(map, rcu); |
1d24eb48 TH |
1060 | map = NULL; |
1061 | } | |
1062 | } | |
1063 | if (map) | |
1064 | nonempty = 1; | |
1065 | } | |
1066 | ||
1067 | if (!nonempty) { | |
1068 | RCU_INIT_POINTER(dev->xps_maps, NULL); | |
b55071eb | 1069 | kfree_rcu(dev_maps, rcu); |
1d24eb48 TH |
1070 | } |
1071 | } | |
1072 | ||
1073 | mutex_unlock(&xps_map_mutex); | |
1074 | ||
1075 | memset(kobj, 0, sizeof(*kobj)); | |
1076 | dev_put(queue->dev); | |
1077 | } | |
1078 | ||
1079 | static struct kobj_type netdev_queue_ktype = { | |
1080 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1081 | .release = netdev_queue_release, | |
1082 | .default_attrs = netdev_queue_default_attrs, | |
1083 | }; | |
1084 | ||
1085 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1086 | { | |
1087 | struct netdev_queue *queue = net->_tx + index; | |
1088 | struct kobject *kobj = &queue->kobj; | |
1089 | int error = 0; | |
1090 | ||
1091 | kobj->kset = net->queues_kset; | |
1092 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1093 | "tx-%u", index); | |
1094 | if (error) { | |
1095 | kobject_put(kobj); | |
1096 | return error; | |
1097 | } | |
1098 | ||
1099 | kobject_uevent(kobj, KOBJ_ADD); | |
1100 | dev_hold(queue->dev); | |
1101 | ||
1102 | return error; | |
1103 | } | |
bf264145 | 1104 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1105 | |
1106 | int | |
1107 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1108 | { | |
bf264145 | 1109 | #ifdef CONFIG_XPS |
1d24eb48 TH |
1110 | int i; |
1111 | int error = 0; | |
1112 | ||
1113 | for (i = old_num; i < new_num; i++) { | |
1114 | error = netdev_queue_add_kobject(net, i); | |
1115 | if (error) { | |
1116 | new_num = old_num; | |
1117 | break; | |
1118 | } | |
1119 | } | |
1120 | ||
1121 | while (--i >= new_num) | |
1122 | kobject_put(&net->_tx[i].kobj); | |
1123 | ||
1124 | return error; | |
bf264145 TH |
1125 | #else |
1126 | return 0; | |
1127 | #endif | |
1d24eb48 TH |
1128 | } |
1129 | ||
1130 | static int register_queue_kobjects(struct net_device *net) | |
1131 | { | |
bf264145 | 1132 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1133 | |
bf264145 | 1134 | #if defined(CONFIG_RPS) || defined(CONFIG_XPS) |
62fe0b40 BH |
1135 | net->queues_kset = kset_create_and_add("queues", |
1136 | NULL, &net->dev.kobj); | |
1137 | if (!net->queues_kset) | |
1138 | return -ENOMEM; | |
bf264145 TH |
1139 | #endif |
1140 | ||
1141 | #ifdef CONFIG_RPS | |
1142 | real_rx = net->real_num_rx_queues; | |
1143 | #endif | |
1144 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1145 | |
bf264145 | 1146 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1147 | if (error) |
1148 | goto error; | |
bf264145 | 1149 | rxq = real_rx; |
1d24eb48 | 1150 | |
bf264145 | 1151 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1152 | if (error) |
1153 | goto error; | |
bf264145 | 1154 | txq = real_tx; |
1d24eb48 TH |
1155 | |
1156 | return 0; | |
1157 | ||
1158 | error: | |
1159 | netdev_queue_update_kobjects(net, txq, 0); | |
1160 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1161 | return error; | |
62fe0b40 | 1162 | } |
0a9627f2 | 1163 | |
1d24eb48 | 1164 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1165 | { |
bf264145 TH |
1166 | int real_rx = 0, real_tx = 0; |
1167 | ||
1168 | #ifdef CONFIG_RPS | |
1169 | real_rx = net->real_num_rx_queues; | |
1170 | #endif | |
1171 | real_tx = net->real_num_tx_queues; | |
1172 | ||
1173 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1174 | netdev_queue_update_kobjects(net, real_tx, 0); | |
1175 | #if defined(CONFIG_RPS) || defined(CONFIG_XPS) | |
0a9627f2 | 1176 | kset_unregister(net->queues_kset); |
bf264145 | 1177 | #endif |
0a9627f2 | 1178 | } |
608b4b95 | 1179 | |
a685e089 | 1180 | static void *net_grab_current_ns(void) |
608b4b95 | 1181 | { |
a685e089 AV |
1182 | struct net *ns = current->nsproxy->net_ns; |
1183 | #ifdef CONFIG_NET_NS | |
1184 | if (ns) | |
1185 | atomic_inc(&ns->passive); | |
1186 | #endif | |
1187 | return ns; | |
608b4b95 EB |
1188 | } |
1189 | ||
1190 | static const void *net_initial_ns(void) | |
1191 | { | |
1192 | return &init_net; | |
1193 | } | |
1194 | ||
1195 | static const void *net_netlink_ns(struct sock *sk) | |
1196 | { | |
1197 | return sock_net(sk); | |
1198 | } | |
1199 | ||
04600794 | 1200 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1201 | .type = KOBJ_NS_TYPE_NET, |
a685e089 | 1202 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1203 | .netlink_ns = net_netlink_ns, |
1204 | .initial_ns = net_initial_ns, | |
a685e089 | 1205 | .drop_ns = net_drop_ns, |
608b4b95 | 1206 | }; |
04600794 | 1207 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1208 | |
1da177e4 | 1209 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 1210 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1211 | { |
43cb76d9 | 1212 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1213 | int retval; |
1da177e4 | 1214 | |
312c004d | 1215 | /* pass interface to uevent. */ |
7eff2e7a | 1216 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1217 | if (retval) |
1218 | goto exit; | |
ca2f37db JT |
1219 | |
1220 | /* pass ifindex to uevent. | |
1221 | * ifindex is useful as it won't change (interface name may change) | |
1222 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1223 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1224 | |
bf62456e | 1225 | exit: |
bf62456e | 1226 | return retval; |
1da177e4 LT |
1227 | } |
1228 | #endif | |
1229 | ||
1230 | /* | |
4ec93edb | 1231 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1232 | * Called when last reference to device kobject is gone. |
1da177e4 | 1233 | */ |
43cb76d9 | 1234 | static void netdev_release(struct device *d) |
1da177e4 | 1235 | { |
43cb76d9 | 1236 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1237 | |
1238 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1239 | ||
0b815a1a | 1240 | kfree(dev->ifalias); |
1da177e4 LT |
1241 | kfree((char *)dev - dev->padded); |
1242 | } | |
1243 | ||
608b4b95 EB |
1244 | static const void *net_namespace(struct device *d) |
1245 | { | |
1246 | struct net_device *dev; | |
1247 | dev = container_of(d, struct net_device, dev); | |
1248 | return dev_net(dev); | |
1249 | } | |
1250 | ||
1da177e4 LT |
1251 | static struct class net_class = { |
1252 | .name = "net", | |
43cb76d9 | 1253 | .dev_release = netdev_release, |
8b41d188 | 1254 | #ifdef CONFIG_SYSFS |
43cb76d9 | 1255 | .dev_attrs = net_class_attributes, |
8b41d188 | 1256 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1257 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 1258 | .dev_uevent = netdev_uevent, |
1da177e4 | 1259 | #endif |
608b4b95 EB |
1260 | .ns_type = &net_ns_type_operations, |
1261 | .namespace = net_namespace, | |
1da177e4 LT |
1262 | }; |
1263 | ||
9093bbb2 SH |
1264 | /* Delete sysfs entries but hold kobject reference until after all |
1265 | * netdev references are gone. | |
1266 | */ | |
8b41d188 | 1267 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1268 | { |
9093bbb2 SH |
1269 | struct device *dev = &(net->dev); |
1270 | ||
1271 | kobject_get(&dev->kobj); | |
3891845e | 1272 | |
1d24eb48 | 1273 | remove_queue_kobjects(net); |
0a9627f2 | 1274 | |
9093bbb2 | 1275 | device_del(dev); |
1da177e4 LT |
1276 | } |
1277 | ||
1278 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1279 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1280 | { |
43cb76d9 | 1281 | struct device *dev = &(net->dev); |
a4dbd674 | 1282 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1283 | int error = 0; |
1da177e4 | 1284 | |
a1b3f594 | 1285 | device_initialize(dev); |
43cb76d9 GKH |
1286 | dev->class = &net_class; |
1287 | dev->platform_data = net; | |
1288 | dev->groups = groups; | |
1da177e4 | 1289 | |
a2205472 | 1290 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1291 | |
8b41d188 | 1292 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1293 | /* Allow for a device specific group */ |
1294 | if (*groups) | |
1295 | groups++; | |
1da177e4 | 1296 | |
0c509a6c | 1297 | *groups++ = &netstat_group; |
22bb1be4 | 1298 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 1299 | if (net->ieee80211_ptr) |
fe9925b5 | 1300 | *groups++ = &wireless_group; |
3d23e349 JB |
1301 | #ifdef CONFIG_WIRELESS_EXT |
1302 | else if (net->wireless_handlers) | |
1303 | *groups++ = &wireless_group; | |
1304 | #endif | |
1da177e4 | 1305 | #endif |
8b41d188 | 1306 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1307 | |
0a9627f2 TH |
1308 | error = device_add(dev); |
1309 | if (error) | |
1310 | return error; | |
1311 | ||
1d24eb48 | 1312 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1313 | if (error) { |
1314 | device_del(dev); | |
1315 | return error; | |
1316 | } | |
1317 | ||
1318 | return error; | |
1da177e4 LT |
1319 | } |
1320 | ||
b8a9787e JV |
1321 | int netdev_class_create_file(struct class_attribute *class_attr) |
1322 | { | |
1323 | return class_create_file(&net_class, class_attr); | |
1324 | } | |
9e34a5b5 | 1325 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
1326 | |
1327 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
1328 | { | |
1329 | class_remove_file(&net_class, class_attr); | |
1330 | } | |
b8a9787e JV |
1331 | EXPORT_SYMBOL(netdev_class_remove_file); |
1332 | ||
8b41d188 | 1333 | int netdev_kobject_init(void) |
1da177e4 | 1334 | { |
608b4b95 | 1335 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1336 | return class_register(&net_class); |
1337 | } |