Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
4ec93edb | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/if_arp.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
608b4b95 | 17 | #include <linux/nsproxy.h> |
1da177e4 | 18 | #include <net/sock.h> |
608b4b95 | 19 | #include <net/net_namespace.h> |
1da177e4 LT |
20 | #include <linux/rtnetlink.h> |
21 | #include <linux/wireless.h> | |
fec5e652 | 22 | #include <linux/vmalloc.h> |
bc3b2d7f | 23 | #include <linux/export.h> |
114cf580 | 24 | #include <linux/jiffies.h> |
8f1546ca | 25 | #include <net/wext.h> |
1da177e4 | 26 | |
342709ef PE |
27 | #include "net-sysfs.h" |
28 | ||
8b41d188 | 29 | #ifdef CONFIG_SYSFS |
1da177e4 | 30 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 31 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 | 32 | static const char fmt_dec[] = "%d\n"; |
8ae6daca | 33 | static const char fmt_udec[] = "%u\n"; |
1da177e4 | 34 | static const char fmt_ulong[] = "%lu\n"; |
be1f3c2c | 35 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 36 | |
4ec93edb | 37 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 38 | { |
fe9925b5 | 39 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
40 | } |
41 | ||
42 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
43 | static ssize_t netdev_show(const struct device *dev, |
44 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
45 | ssize_t (*format)(const struct net_device *, char *)) |
46 | { | |
43cb76d9 | 47 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
48 | ssize_t ret = -EINVAL; |
49 | ||
50 | read_lock(&dev_base_lock); | |
51 | if (dev_isalive(net)) | |
52 | ret = (*format)(net, buf); | |
53 | read_unlock(&dev_base_lock); | |
54 | ||
55 | return ret; | |
56 | } | |
57 | ||
58 | /* generate a show function for simple field */ | |
59 | #define NETDEVICE_SHOW(field, format_string) \ | |
60 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
61 | { \ | |
62 | return sprintf(buf, format_string, net->field); \ | |
63 | } \ | |
43cb76d9 GKH |
64 | static ssize_t show_##field(struct device *dev, \ |
65 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 66 | { \ |
43cb76d9 | 67 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
68 | } |
69 | ||
70 | ||
71 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 72 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
73 | const char *buf, size_t len, |
74 | int (*set)(struct net_device *, unsigned long)) | |
75 | { | |
76 | struct net_device *net = to_net_dev(dev); | |
77 | char *endp; | |
78 | unsigned long new; | |
79 | int ret = -EINVAL; | |
80 | ||
81 | if (!capable(CAP_NET_ADMIN)) | |
82 | return -EPERM; | |
83 | ||
84 | new = simple_strtoul(buf, &endp, 0); | |
85 | if (endp == buf) | |
86 | goto err; | |
87 | ||
5a5990d3 | 88 | if (!rtnl_trylock()) |
336ca57c | 89 | return restart_syscall(); |
5a5990d3 | 90 | |
1da177e4 LT |
91 | if (dev_isalive(net)) { |
92 | if ((ret = (*set)(net, new)) == 0) | |
93 | ret = len; | |
94 | } | |
95 | rtnl_unlock(); | |
96 | err: | |
97 | return ret; | |
98 | } | |
99 | ||
9d29672c | 100 | NETDEVICE_SHOW(dev_id, fmt_hex); |
c1f79426 | 101 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
fd586bac KS |
102 | NETDEVICE_SHOW(addr_len, fmt_dec); |
103 | NETDEVICE_SHOW(iflink, fmt_dec); | |
104 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
fd586bac | 105 | NETDEVICE_SHOW(type, fmt_dec); |
b00055aa | 106 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
107 | |
108 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
109 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
110 | char *buf) | |
1da177e4 LT |
111 | { |
112 | struct net_device *net = to_net_dev(dev); | |
113 | ssize_t ret = -EINVAL; | |
114 | ||
115 | read_lock(&dev_base_lock); | |
116 | if (dev_isalive(net)) | |
7ffc49a6 | 117 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
118 | read_unlock(&dev_base_lock); |
119 | return ret; | |
120 | } | |
121 | ||
43cb76d9 GKH |
122 | static ssize_t show_broadcast(struct device *dev, |
123 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
124 | { |
125 | struct net_device *net = to_net_dev(dev); | |
126 | if (dev_isalive(net)) | |
7ffc49a6 | 127 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
128 | return -EINVAL; |
129 | } | |
130 | ||
43cb76d9 GKH |
131 | static ssize_t show_carrier(struct device *dev, |
132 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
133 | { |
134 | struct net_device *netdev = to_net_dev(dev); | |
135 | if (netif_running(netdev)) { | |
136 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
137 | } | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
d519e17e AG |
141 | static ssize_t show_speed(struct device *dev, |
142 | struct device_attribute *attr, char *buf) | |
143 | { | |
144 | struct net_device *netdev = to_net_dev(dev); | |
145 | int ret = -EINVAL; | |
146 | ||
147 | if (!rtnl_trylock()) | |
148 | return restart_syscall(); | |
149 | ||
8ae6daca DD |
150 | if (netif_running(netdev)) { |
151 | struct ethtool_cmd cmd; | |
4bc71cb9 | 152 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca | 153 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); |
d519e17e AG |
154 | } |
155 | rtnl_unlock(); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | static ssize_t show_duplex(struct device *dev, | |
160 | struct device_attribute *attr, char *buf) | |
161 | { | |
162 | struct net_device *netdev = to_net_dev(dev); | |
163 | int ret = -EINVAL; | |
164 | ||
165 | if (!rtnl_trylock()) | |
166 | return restart_syscall(); | |
167 | ||
8ae6daca DD |
168 | if (netif_running(netdev)) { |
169 | struct ethtool_cmd cmd; | |
4bc71cb9 | 170 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca DD |
171 | ret = sprintf(buf, "%s\n", |
172 | cmd.duplex ? "full" : "half"); | |
d519e17e AG |
173 | } |
174 | rtnl_unlock(); | |
175 | return ret; | |
176 | } | |
177 | ||
43cb76d9 GKH |
178 | static ssize_t show_dormant(struct device *dev, |
179 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
180 | { |
181 | struct net_device *netdev = to_net_dev(dev); | |
182 | ||
183 | if (netif_running(netdev)) | |
184 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
185 | ||
186 | return -EINVAL; | |
187 | } | |
188 | ||
36cbd3dc | 189 | static const char *const operstates[] = { |
b00055aa SR |
190 | "unknown", |
191 | "notpresent", /* currently unused */ | |
192 | "down", | |
193 | "lowerlayerdown", | |
194 | "testing", /* currently unused */ | |
195 | "dormant", | |
196 | "up" | |
197 | }; | |
198 | ||
43cb76d9 GKH |
199 | static ssize_t show_operstate(struct device *dev, |
200 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
201 | { |
202 | const struct net_device *netdev = to_net_dev(dev); | |
203 | unsigned char operstate; | |
204 | ||
205 | read_lock(&dev_base_lock); | |
206 | operstate = netdev->operstate; | |
207 | if (!netif_running(netdev)) | |
208 | operstate = IF_OPER_DOWN; | |
209 | read_unlock(&dev_base_lock); | |
210 | ||
e3a5cd9e | 211 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
212 | return -EINVAL; /* should not happen */ |
213 | ||
214 | return sprintf(buf, "%s\n", operstates[operstate]); | |
215 | } | |
216 | ||
1da177e4 LT |
217 | /* read-write attributes */ |
218 | NETDEVICE_SHOW(mtu, fmt_dec); | |
219 | ||
220 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
221 | { | |
222 | return dev_set_mtu(net, (int) new_mtu); | |
223 | } | |
224 | ||
43cb76d9 GKH |
225 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
226 | const char *buf, size_t len) | |
1da177e4 | 227 | { |
43cb76d9 | 228 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
229 | } |
230 | ||
1da177e4 LT |
231 | NETDEVICE_SHOW(flags, fmt_hex); |
232 | ||
233 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
234 | { | |
235 | return dev_change_flags(net, (unsigned) new_flags); | |
236 | } | |
237 | ||
43cb76d9 GKH |
238 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
239 | const char *buf, size_t len) | |
1da177e4 | 240 | { |
43cb76d9 | 241 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
242 | } |
243 | ||
1da177e4 LT |
244 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
245 | ||
246 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
247 | { | |
248 | net->tx_queue_len = new_len; | |
249 | return 0; | |
250 | } | |
251 | ||
43cb76d9 GKH |
252 | static ssize_t store_tx_queue_len(struct device *dev, |
253 | struct device_attribute *attr, | |
254 | const char *buf, size_t len) | |
1da177e4 | 255 | { |
43cb76d9 | 256 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
257 | } |
258 | ||
0b815a1a SH |
259 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
260 | const char *buf, size_t len) | |
261 | { | |
262 | struct net_device *netdev = to_net_dev(dev); | |
263 | size_t count = len; | |
264 | ssize_t ret; | |
265 | ||
266 | if (!capable(CAP_NET_ADMIN)) | |
267 | return -EPERM; | |
268 | ||
269 | /* ignore trailing newline */ | |
270 | if (len > 0 && buf[len - 1] == '\n') | |
271 | --count; | |
272 | ||
336ca57c EB |
273 | if (!rtnl_trylock()) |
274 | return restart_syscall(); | |
0b815a1a SH |
275 | ret = dev_set_alias(netdev, buf, count); |
276 | rtnl_unlock(); | |
277 | ||
278 | return ret < 0 ? ret : len; | |
279 | } | |
280 | ||
281 | static ssize_t show_ifalias(struct device *dev, | |
282 | struct device_attribute *attr, char *buf) | |
283 | { | |
284 | const struct net_device *netdev = to_net_dev(dev); | |
285 | ssize_t ret = 0; | |
286 | ||
336ca57c EB |
287 | if (!rtnl_trylock()) |
288 | return restart_syscall(); | |
0b815a1a SH |
289 | if (netdev->ifalias) |
290 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
291 | rtnl_unlock(); | |
292 | return ret; | |
293 | } | |
294 | ||
a512b92b VD |
295 | NETDEVICE_SHOW(group, fmt_dec); |
296 | ||
297 | static int change_group(struct net_device *net, unsigned long new_group) | |
298 | { | |
299 | dev_set_group(net, (int) new_group); | |
300 | return 0; | |
301 | } | |
302 | ||
303 | static ssize_t store_group(struct device *dev, struct device_attribute *attr, | |
304 | const char *buf, size_t len) | |
305 | { | |
306 | return netdev_store(dev, attr, buf, len, change_group); | |
307 | } | |
308 | ||
43cb76d9 | 309 | static struct device_attribute net_class_attributes[] = { |
c1f79426 | 310 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
fd586bac | 311 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 312 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 313 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
314 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
315 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
fd586bac | 316 | __ATTR(type, S_IRUGO, show_type, NULL), |
b00055aa | 317 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
318 | __ATTR(address, S_IRUGO, show_address, NULL), |
319 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
320 | __ATTR(carrier, S_IRUGO, show_carrier, NULL), | |
d519e17e AG |
321 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
322 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
323 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
324 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
325 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
326 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
327 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
328 | store_tx_queue_len), | |
b6644cb7 | 329 | __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), |
fd586bac | 330 | {} |
1da177e4 LT |
331 | }; |
332 | ||
333 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
334 | static ssize_t netstat_show(const struct device *d, |
335 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
336 | unsigned long offset) |
337 | { | |
43cb76d9 | 338 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
339 | ssize_t ret = -EINVAL; |
340 | ||
be1f3c2c BH |
341 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
342 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
343 | |
344 | read_lock(&dev_base_lock); | |
96e74088 | 345 | if (dev_isalive(dev)) { |
28172739 ED |
346 | struct rtnl_link_stats64 temp; |
347 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
348 | ||
be1f3c2c | 349 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 350 | } |
1da177e4 LT |
351 | read_unlock(&dev_base_lock); |
352 | return ret; | |
353 | } | |
354 | ||
355 | /* generate a read-only statistics attribute */ | |
356 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
357 | static ssize_t show_##name(struct device *d, \ |
358 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 359 | { \ |
43cb76d9 | 360 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 361 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 362 | } \ |
43cb76d9 | 363 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
364 | |
365 | NETSTAT_ENTRY(rx_packets); | |
366 | NETSTAT_ENTRY(tx_packets); | |
367 | NETSTAT_ENTRY(rx_bytes); | |
368 | NETSTAT_ENTRY(tx_bytes); | |
369 | NETSTAT_ENTRY(rx_errors); | |
370 | NETSTAT_ENTRY(tx_errors); | |
371 | NETSTAT_ENTRY(rx_dropped); | |
372 | NETSTAT_ENTRY(tx_dropped); | |
373 | NETSTAT_ENTRY(multicast); | |
374 | NETSTAT_ENTRY(collisions); | |
375 | NETSTAT_ENTRY(rx_length_errors); | |
376 | NETSTAT_ENTRY(rx_over_errors); | |
377 | NETSTAT_ENTRY(rx_crc_errors); | |
378 | NETSTAT_ENTRY(rx_frame_errors); | |
379 | NETSTAT_ENTRY(rx_fifo_errors); | |
380 | NETSTAT_ENTRY(rx_missed_errors); | |
381 | NETSTAT_ENTRY(tx_aborted_errors); | |
382 | NETSTAT_ENTRY(tx_carrier_errors); | |
383 | NETSTAT_ENTRY(tx_fifo_errors); | |
384 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
385 | NETSTAT_ENTRY(tx_window_errors); | |
386 | NETSTAT_ENTRY(rx_compressed); | |
387 | NETSTAT_ENTRY(tx_compressed); | |
388 | ||
389 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
390 | &dev_attr_rx_packets.attr, |
391 | &dev_attr_tx_packets.attr, | |
392 | &dev_attr_rx_bytes.attr, | |
393 | &dev_attr_tx_bytes.attr, | |
394 | &dev_attr_rx_errors.attr, | |
395 | &dev_attr_tx_errors.attr, | |
396 | &dev_attr_rx_dropped.attr, | |
397 | &dev_attr_tx_dropped.attr, | |
398 | &dev_attr_multicast.attr, | |
399 | &dev_attr_collisions.attr, | |
400 | &dev_attr_rx_length_errors.attr, | |
401 | &dev_attr_rx_over_errors.attr, | |
402 | &dev_attr_rx_crc_errors.attr, | |
403 | &dev_attr_rx_frame_errors.attr, | |
404 | &dev_attr_rx_fifo_errors.attr, | |
405 | &dev_attr_rx_missed_errors.attr, | |
406 | &dev_attr_tx_aborted_errors.attr, | |
407 | &dev_attr_tx_carrier_errors.attr, | |
408 | &dev_attr_tx_fifo_errors.attr, | |
409 | &dev_attr_tx_heartbeat_errors.attr, | |
410 | &dev_attr_tx_window_errors.attr, | |
411 | &dev_attr_rx_compressed.attr, | |
412 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
413 | NULL |
414 | }; | |
415 | ||
416 | ||
417 | static struct attribute_group netstat_group = { | |
418 | .name = "statistics", | |
419 | .attrs = netstat_attrs, | |
420 | }; | |
421 | ||
22bb1be4 | 422 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
1da177e4 | 423 | /* helper function that does all the locking etc for wireless stats */ |
43cb76d9 | 424 | static ssize_t wireless_show(struct device *d, char *buf, |
1da177e4 LT |
425 | ssize_t (*format)(const struct iw_statistics *, |
426 | char *)) | |
427 | { | |
43cb76d9 | 428 | struct net_device *dev = to_net_dev(d); |
8f1546ca | 429 | const struct iw_statistics *iw; |
1da177e4 | 430 | ssize_t ret = -EINVAL; |
4ec93edb | 431 | |
b8afe641 EB |
432 | if (!rtnl_trylock()) |
433 | return restart_syscall(); | |
6dd214b5 | 434 | if (dev_isalive(dev)) { |
8f1546ca JB |
435 | iw = get_wireless_stats(dev); |
436 | if (iw) | |
6dd214b5 AB |
437 | ret = (*format)(iw, buf); |
438 | } | |
a160ee69 | 439 | rtnl_unlock(); |
1da177e4 LT |
440 | |
441 | return ret; | |
442 | } | |
443 | ||
444 | /* show function template for wireless fields */ | |
445 | #define WIRELESS_SHOW(name, field, format_string) \ | |
446 | static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \ | |
447 | { \ | |
448 | return sprintf(buf, format_string, iw->field); \ | |
449 | } \ | |
43cb76d9 GKH |
450 | static ssize_t show_iw_##name(struct device *d, \ |
451 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 452 | { \ |
43cb76d9 | 453 | return wireless_show(d, buf, format_iw_##name); \ |
1da177e4 | 454 | } \ |
43cb76d9 | 455 | static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL) |
1da177e4 LT |
456 | |
457 | WIRELESS_SHOW(status, status, fmt_hex); | |
458 | WIRELESS_SHOW(link, qual.qual, fmt_dec); | |
459 | WIRELESS_SHOW(level, qual.level, fmt_dec); | |
460 | WIRELESS_SHOW(noise, qual.noise, fmt_dec); | |
461 | WIRELESS_SHOW(nwid, discard.nwid, fmt_dec); | |
462 | WIRELESS_SHOW(crypt, discard.code, fmt_dec); | |
463 | WIRELESS_SHOW(fragment, discard.fragment, fmt_dec); | |
464 | WIRELESS_SHOW(misc, discard.misc, fmt_dec); | |
465 | WIRELESS_SHOW(retries, discard.retries, fmt_dec); | |
466 | WIRELESS_SHOW(beacon, miss.beacon, fmt_dec); | |
467 | ||
468 | static struct attribute *wireless_attrs[] = { | |
43cb76d9 GKH |
469 | &dev_attr_status.attr, |
470 | &dev_attr_link.attr, | |
471 | &dev_attr_level.attr, | |
472 | &dev_attr_noise.attr, | |
473 | &dev_attr_nwid.attr, | |
474 | &dev_attr_crypt.attr, | |
475 | &dev_attr_fragment.attr, | |
476 | &dev_attr_retries.attr, | |
477 | &dev_attr_misc.attr, | |
478 | &dev_attr_beacon.attr, | |
1da177e4 LT |
479 | NULL |
480 | }; | |
481 | ||
482 | static struct attribute_group wireless_group = { | |
483 | .name = "wireless", | |
484 | .attrs = wireless_attrs, | |
485 | }; | |
486 | #endif | |
d6523ddf | 487 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 488 | |
30bde1f5 | 489 | #ifdef CONFIG_RPS |
0a9627f2 TH |
490 | /* |
491 | * RX queue sysfs structures and functions. | |
492 | */ | |
493 | struct rx_queue_attribute { | |
494 | struct attribute attr; | |
495 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
496 | struct rx_queue_attribute *attr, char *buf); | |
497 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
498 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
499 | }; | |
500 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
501 | struct rx_queue_attribute, attr) | |
502 | ||
503 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
504 | ||
505 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
506 | char *buf) | |
507 | { | |
508 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
509 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
510 | ||
511 | if (!attribute->show) | |
512 | return -EIO; | |
513 | ||
514 | return attribute->show(queue, attribute, buf); | |
515 | } | |
516 | ||
517 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
518 | const char *buf, size_t count) | |
519 | { | |
520 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
521 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
522 | ||
523 | if (!attribute->store) | |
524 | return -EIO; | |
525 | ||
526 | return attribute->store(queue, attribute, buf, count); | |
527 | } | |
528 | ||
fa50d645 | 529 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
530 | .show = rx_queue_attr_show, |
531 | .store = rx_queue_attr_store, | |
532 | }; | |
533 | ||
534 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
535 | struct rx_queue_attribute *attribute, char *buf) | |
536 | { | |
537 | struct rps_map *map; | |
538 | cpumask_var_t mask; | |
539 | size_t len = 0; | |
540 | int i; | |
541 | ||
542 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
543 | return -ENOMEM; | |
544 | ||
545 | rcu_read_lock(); | |
546 | map = rcu_dereference(queue->rps_map); | |
547 | if (map) | |
548 | for (i = 0; i < map->len; i++) | |
549 | cpumask_set_cpu(map->cpus[i], mask); | |
550 | ||
551 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
552 | if (PAGE_SIZE - len < 3) { | |
553 | rcu_read_unlock(); | |
554 | free_cpumask_var(mask); | |
555 | return -EINVAL; | |
556 | } | |
557 | rcu_read_unlock(); | |
558 | ||
559 | free_cpumask_var(mask); | |
560 | len += sprintf(buf + len, "\n"); | |
561 | return len; | |
562 | } | |
563 | ||
f5acb907 | 564 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
565 | struct rx_queue_attribute *attribute, |
566 | const char *buf, size_t len) | |
567 | { | |
568 | struct rps_map *old_map, *map; | |
569 | cpumask_var_t mask; | |
570 | int err, cpu, i; | |
571 | static DEFINE_SPINLOCK(rps_map_lock); | |
572 | ||
573 | if (!capable(CAP_NET_ADMIN)) | |
574 | return -EPERM; | |
575 | ||
576 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
577 | return -ENOMEM; | |
578 | ||
579 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
580 | if (err) { | |
581 | free_cpumask_var(mask); | |
582 | return err; | |
583 | } | |
584 | ||
585 | map = kzalloc(max_t(unsigned, | |
586 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), | |
587 | GFP_KERNEL); | |
588 | if (!map) { | |
589 | free_cpumask_var(mask); | |
590 | return -ENOMEM; | |
591 | } | |
592 | ||
593 | i = 0; | |
594 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
595 | map->cpus[i++] = cpu; | |
596 | ||
597 | if (i) | |
598 | map->len = i; | |
599 | else { | |
600 | kfree(map); | |
601 | map = NULL; | |
602 | } | |
603 | ||
604 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
605 | old_map = rcu_dereference_protected(queue->rps_map, |
606 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
607 | rcu_assign_pointer(queue->rps_map, map); |
608 | spin_unlock(&rps_map_lock); | |
609 | ||
adc9300e ED |
610 | if (map) |
611 | jump_label_inc(&rps_needed); | |
612 | if (old_map) { | |
f6f80238 | 613 | kfree_rcu(old_map, rcu); |
adc9300e ED |
614 | jump_label_dec(&rps_needed); |
615 | } | |
0a9627f2 TH |
616 | free_cpumask_var(mask); |
617 | return len; | |
618 | } | |
619 | ||
fec5e652 TH |
620 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
621 | struct rx_queue_attribute *attr, | |
622 | char *buf) | |
623 | { | |
624 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 625 | unsigned long val = 0; |
fec5e652 TH |
626 | |
627 | rcu_read_lock(); | |
628 | flow_table = rcu_dereference(queue->rps_flow_table); | |
629 | if (flow_table) | |
60b778ce | 630 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
631 | rcu_read_unlock(); |
632 | ||
60b778ce | 633 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
634 | } |
635 | ||
636 | static void rps_dev_flow_table_release_work(struct work_struct *work) | |
637 | { | |
638 | struct rps_dev_flow_table *table = container_of(work, | |
639 | struct rps_dev_flow_table, free_work); | |
640 | ||
641 | vfree(table); | |
642 | } | |
643 | ||
644 | static void rps_dev_flow_table_release(struct rcu_head *rcu) | |
645 | { | |
646 | struct rps_dev_flow_table *table = container_of(rcu, | |
647 | struct rps_dev_flow_table, rcu); | |
648 | ||
649 | INIT_WORK(&table->free_work, rps_dev_flow_table_release_work); | |
650 | schedule_work(&table->free_work); | |
651 | } | |
652 | ||
f5acb907 | 653 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
654 | struct rx_queue_attribute *attr, |
655 | const char *buf, size_t len) | |
656 | { | |
60b778ce | 657 | unsigned long mask, count; |
fec5e652 TH |
658 | struct rps_dev_flow_table *table, *old_table; |
659 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 660 | int rc; |
fec5e652 TH |
661 | |
662 | if (!capable(CAP_NET_ADMIN)) | |
663 | return -EPERM; | |
664 | ||
60b778ce ED |
665 | rc = kstrtoul(buf, 0, &count); |
666 | if (rc < 0) | |
667 | return rc; | |
fec5e652 TH |
668 | |
669 | if (count) { | |
60b778ce ED |
670 | mask = count - 1; |
671 | /* mask = roundup_pow_of_two(count) - 1; | |
672 | * without overflows... | |
673 | */ | |
674 | while ((mask | (mask >> 1)) != mask) | |
675 | mask |= (mask >> 1); | |
676 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
677 | * and on 32bit arches, must check RPS_DEV_FLOW_TABLE_SIZE(mask + 1) | |
678 | * doesnt overflow. | |
679 | */ | |
680 | #if BITS_PER_LONG > 32 | |
681 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 682 | return -EINVAL; |
60b778ce ED |
683 | #else |
684 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 685 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
686 | /* Enforce a limit to prevent overflow */ |
687 | return -EINVAL; | |
688 | } | |
60b778ce ED |
689 | #endif |
690 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
691 | if (!table) |
692 | return -ENOMEM; | |
693 | ||
60b778ce ED |
694 | table->mask = mask; |
695 | for (count = 0; count <= mask; count++) | |
696 | table->flows[count].cpu = RPS_NO_CPU; | |
fec5e652 TH |
697 | } else |
698 | table = NULL; | |
699 | ||
700 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
701 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
702 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
703 | rcu_assign_pointer(queue->rps_flow_table, table); |
704 | spin_unlock(&rps_dev_flow_lock); | |
705 | ||
706 | if (old_table) | |
707 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
708 | ||
709 | return len; | |
710 | } | |
711 | ||
0a9627f2 TH |
712 | static struct rx_queue_attribute rps_cpus_attribute = |
713 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
714 | ||
fec5e652 TH |
715 | |
716 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
717 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
718 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
719 | ||
0a9627f2 TH |
720 | static struct attribute *rx_queue_default_attrs[] = { |
721 | &rps_cpus_attribute.attr, | |
fec5e652 | 722 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
723 | NULL |
724 | }; | |
725 | ||
726 | static void rx_queue_release(struct kobject *kobj) | |
727 | { | |
728 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
6e3f7faf ED |
729 | struct rps_map *map; |
730 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 731 | |
fec5e652 | 732 | |
33d480ce | 733 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
734 | if (map) { |
735 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 736 | kfree_rcu(map, rcu); |
9ea19481 | 737 | } |
6e3f7faf | 738 | |
33d480ce | 739 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
740 | if (flow_table) { |
741 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 742 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 743 | } |
0a9627f2 | 744 | |
9ea19481 | 745 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 746 | dev_put(queue->dev); |
0a9627f2 TH |
747 | } |
748 | ||
749 | static struct kobj_type rx_queue_ktype = { | |
750 | .sysfs_ops = &rx_queue_sysfs_ops, | |
751 | .release = rx_queue_release, | |
752 | .default_attrs = rx_queue_default_attrs, | |
753 | }; | |
754 | ||
755 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
756 | { | |
757 | struct netdev_rx_queue *queue = net->_rx + index; | |
758 | struct kobject *kobj = &queue->kobj; | |
759 | int error = 0; | |
760 | ||
761 | kobj->kset = net->queues_kset; | |
762 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
763 | "rx-%u", index); | |
764 | if (error) { | |
765 | kobject_put(kobj); | |
766 | return error; | |
767 | } | |
768 | ||
769 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 770 | dev_hold(queue->dev); |
0a9627f2 TH |
771 | |
772 | return error; | |
773 | } | |
bf264145 | 774 | #endif /* CONFIG_RPS */ |
0a9627f2 | 775 | |
62fe0b40 BH |
776 | int |
777 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 778 | { |
bf264145 | 779 | #ifdef CONFIG_RPS |
0a9627f2 TH |
780 | int i; |
781 | int error = 0; | |
782 | ||
62fe0b40 | 783 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 784 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
785 | if (error) { |
786 | new_num = old_num; | |
0a9627f2 | 787 | break; |
62fe0b40 | 788 | } |
0a9627f2 TH |
789 | } |
790 | ||
62fe0b40 BH |
791 | while (--i >= new_num) |
792 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
793 | |
794 | return error; | |
bf264145 TH |
795 | #else |
796 | return 0; | |
797 | #endif | |
0a9627f2 TH |
798 | } |
799 | ||
ccf5ff69 | 800 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
801 | /* |
802 | * netdev_queue sysfs structures and functions. | |
803 | */ | |
804 | struct netdev_queue_attribute { | |
805 | struct attribute attr; | |
806 | ssize_t (*show)(struct netdev_queue *queue, | |
807 | struct netdev_queue_attribute *attr, char *buf); | |
808 | ssize_t (*store)(struct netdev_queue *queue, | |
809 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
810 | }; | |
811 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
812 | struct netdev_queue_attribute, attr) | |
813 | ||
814 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
815 | ||
816 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
817 | struct attribute *attr, char *buf) | |
818 | { | |
819 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
820 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
821 | ||
822 | if (!attribute->show) | |
823 | return -EIO; | |
824 | ||
825 | return attribute->show(queue, attribute, buf); | |
826 | } | |
827 | ||
828 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
829 | struct attribute *attr, | |
830 | const char *buf, size_t count) | |
831 | { | |
832 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
833 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
834 | ||
835 | if (!attribute->store) | |
836 | return -EIO; | |
837 | ||
838 | return attribute->store(queue, attribute, buf, count); | |
839 | } | |
840 | ||
841 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
842 | .show = netdev_queue_attr_show, | |
843 | .store = netdev_queue_attr_store, | |
844 | }; | |
845 | ||
ccf5ff69 | 846 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
847 | struct netdev_queue_attribute *attribute, | |
848 | char *buf) | |
849 | { | |
850 | unsigned long trans_timeout; | |
851 | ||
852 | spin_lock_irq(&queue->_xmit_lock); | |
853 | trans_timeout = queue->trans_timeout; | |
854 | spin_unlock_irq(&queue->_xmit_lock); | |
855 | ||
856 | return sprintf(buf, "%lu", trans_timeout); | |
857 | } | |
858 | ||
859 | static struct netdev_queue_attribute queue_trans_timeout = | |
860 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); | |
861 | ||
114cf580 TH |
862 | #ifdef CONFIG_BQL |
863 | /* | |
864 | * Byte queue limits sysfs structures and functions. | |
865 | */ | |
866 | static ssize_t bql_show(char *buf, unsigned int value) | |
867 | { | |
868 | return sprintf(buf, "%u\n", value); | |
869 | } | |
870 | ||
871 | static ssize_t bql_set(const char *buf, const size_t count, | |
872 | unsigned int *pvalue) | |
873 | { | |
874 | unsigned int value; | |
875 | int err; | |
876 | ||
877 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) | |
878 | value = DQL_MAX_LIMIT; | |
879 | else { | |
880 | err = kstrtouint(buf, 10, &value); | |
881 | if (err < 0) | |
882 | return err; | |
883 | if (value > DQL_MAX_LIMIT) | |
884 | return -EINVAL; | |
885 | } | |
886 | ||
887 | *pvalue = value; | |
888 | ||
889 | return count; | |
890 | } | |
891 | ||
892 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
893 | struct netdev_queue_attribute *attr, | |
894 | char *buf) | |
895 | { | |
896 | struct dql *dql = &queue->dql; | |
897 | ||
898 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
899 | } | |
900 | ||
901 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
902 | struct netdev_queue_attribute *attribute, | |
903 | const char *buf, size_t len) | |
904 | { | |
905 | struct dql *dql = &queue->dql; | |
906 | unsigned value; | |
907 | int err; | |
908 | ||
909 | err = kstrtouint(buf, 10, &value); | |
910 | if (err < 0) | |
911 | return err; | |
912 | ||
913 | dql->slack_hold_time = msecs_to_jiffies(value); | |
914 | ||
915 | return len; | |
916 | } | |
917 | ||
918 | static struct netdev_queue_attribute bql_hold_time_attribute = | |
919 | __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, | |
920 | bql_set_hold_time); | |
921 | ||
922 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
923 | struct netdev_queue_attribute *attr, | |
924 | char *buf) | |
925 | { | |
926 | struct dql *dql = &queue->dql; | |
927 | ||
928 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
929 | } | |
930 | ||
931 | static struct netdev_queue_attribute bql_inflight_attribute = | |
932 | __ATTR(inflight, S_IRUGO | S_IWUSR, bql_show_inflight, NULL); | |
933 | ||
934 | #define BQL_ATTR(NAME, FIELD) \ | |
935 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
936 | struct netdev_queue_attribute *attr, \ | |
937 | char *buf) \ | |
938 | { \ | |
939 | return bql_show(buf, queue->dql.FIELD); \ | |
940 | } \ | |
941 | \ | |
942 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
943 | struct netdev_queue_attribute *attr, \ | |
944 | const char *buf, size_t len) \ | |
945 | { \ | |
946 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
947 | } \ | |
948 | \ | |
949 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ | |
950 | __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ | |
951 | bql_set_ ## NAME); | |
952 | ||
953 | BQL_ATTR(limit, limit) | |
954 | BQL_ATTR(limit_max, max_limit) | |
955 | BQL_ATTR(limit_min, min_limit) | |
956 | ||
957 | static struct attribute *dql_attrs[] = { | |
958 | &bql_limit_attribute.attr, | |
959 | &bql_limit_max_attribute.attr, | |
960 | &bql_limit_min_attribute.attr, | |
961 | &bql_hold_time_attribute.attr, | |
962 | &bql_inflight_attribute.attr, | |
963 | NULL | |
964 | }; | |
965 | ||
966 | static struct attribute_group dql_group = { | |
967 | .name = "byte_queue_limits", | |
968 | .attrs = dql_attrs, | |
969 | }; | |
970 | #endif /* CONFIG_BQL */ | |
971 | ||
ccf5ff69 | 972 | #ifdef CONFIG_XPS |
1d24eb48 | 973 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
0a9627f2 | 974 | { |
1d24eb48 TH |
975 | struct net_device *dev = queue->dev; |
976 | int i; | |
977 | ||
978 | for (i = 0; i < dev->num_tx_queues; i++) | |
979 | if (queue == &dev->_tx[i]) | |
980 | break; | |
981 | ||
982 | BUG_ON(i >= dev->num_tx_queues); | |
983 | ||
984 | return i; | |
985 | } | |
986 | ||
987 | ||
988 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
989 | struct netdev_queue_attribute *attribute, char *buf) | |
990 | { | |
991 | struct net_device *dev = queue->dev; | |
992 | struct xps_dev_maps *dev_maps; | |
993 | cpumask_var_t mask; | |
994 | unsigned long index; | |
995 | size_t len = 0; | |
996 | int i; | |
997 | ||
998 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
999 | return -ENOMEM; | |
1000 | ||
1001 | index = get_netdev_queue_index(queue); | |
1002 | ||
1003 | rcu_read_lock(); | |
1004 | dev_maps = rcu_dereference(dev->xps_maps); | |
1005 | if (dev_maps) { | |
1006 | for_each_possible_cpu(i) { | |
1007 | struct xps_map *map = | |
1008 | rcu_dereference(dev_maps->cpu_map[i]); | |
1009 | if (map) { | |
1010 | int j; | |
1011 | for (j = 0; j < map->len; j++) { | |
1012 | if (map->queues[j] == index) { | |
1013 | cpumask_set_cpu(i, mask); | |
1014 | break; | |
1015 | } | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | rcu_read_unlock(); | |
1021 | ||
1022 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
1023 | if (PAGE_SIZE - len < 3) { | |
1024 | free_cpumask_var(mask); | |
1025 | return -EINVAL; | |
1026 | } | |
1027 | ||
1028 | free_cpumask_var(mask); | |
1029 | len += sprintf(buf + len, "\n"); | |
1030 | return len; | |
1031 | } | |
1032 | ||
1d24eb48 | 1033 | static DEFINE_MUTEX(xps_map_mutex); |
a4177869 ED |
1034 | #define xmap_dereference(P) \ |
1035 | rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex)) | |
1d24eb48 | 1036 | |
927fbec1 TH |
1037 | static void xps_queue_release(struct netdev_queue *queue) |
1038 | { | |
1039 | struct net_device *dev = queue->dev; | |
1040 | struct xps_dev_maps *dev_maps; | |
1041 | struct xps_map *map; | |
1042 | unsigned long index; | |
1043 | int i, pos, nonempty = 0; | |
1044 | ||
1045 | index = get_netdev_queue_index(queue); | |
1046 | ||
1047 | mutex_lock(&xps_map_mutex); | |
1048 | dev_maps = xmap_dereference(dev->xps_maps); | |
1049 | ||
1050 | if (dev_maps) { | |
1051 | for_each_possible_cpu(i) { | |
1052 | map = xmap_dereference(dev_maps->cpu_map[i]); | |
1053 | if (!map) | |
1054 | continue; | |
1055 | ||
1056 | for (pos = 0; pos < map->len; pos++) | |
1057 | if (map->queues[pos] == index) | |
1058 | break; | |
1059 | ||
1060 | if (pos < map->len) { | |
1061 | if (map->len > 1) | |
1062 | map->queues[pos] = | |
1063 | map->queues[--map->len]; | |
1064 | else { | |
1065 | RCU_INIT_POINTER(dev_maps->cpu_map[i], | |
1066 | NULL); | |
1067 | kfree_rcu(map, rcu); | |
1068 | map = NULL; | |
1069 | } | |
1070 | } | |
1071 | if (map) | |
1072 | nonempty = 1; | |
1073 | } | |
1074 | ||
1075 | if (!nonempty) { | |
1076 | RCU_INIT_POINTER(dev->xps_maps, NULL); | |
1077 | kfree_rcu(dev_maps, rcu); | |
1078 | } | |
1079 | } | |
1080 | mutex_unlock(&xps_map_mutex); | |
1081 | } | |
1082 | ||
1d24eb48 TH |
1083 | static ssize_t store_xps_map(struct netdev_queue *queue, |
1084 | struct netdev_queue_attribute *attribute, | |
1085 | const char *buf, size_t len) | |
1086 | { | |
1087 | struct net_device *dev = queue->dev; | |
1088 | cpumask_var_t mask; | |
1089 | int err, i, cpu, pos, map_len, alloc_len, need_set; | |
1090 | unsigned long index; | |
1091 | struct xps_map *map, *new_map; | |
1092 | struct xps_dev_maps *dev_maps, *new_dev_maps; | |
1093 | int nonempty = 0; | |
19b05f81 | 1094 | int numa_node_id = -2; |
1d24eb48 TH |
1095 | |
1096 | if (!capable(CAP_NET_ADMIN)) | |
1097 | return -EPERM; | |
1098 | ||
1099 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1100 | return -ENOMEM; | |
1101 | ||
1102 | index = get_netdev_queue_index(queue); | |
1103 | ||
1104 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1105 | if (err) { | |
1106 | free_cpumask_var(mask); | |
1107 | return err; | |
1108 | } | |
1109 | ||
1110 | new_dev_maps = kzalloc(max_t(unsigned, | |
1111 | XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL); | |
1112 | if (!new_dev_maps) { | |
1113 | free_cpumask_var(mask); | |
1114 | return -ENOMEM; | |
1115 | } | |
1116 | ||
1117 | mutex_lock(&xps_map_mutex); | |
1118 | ||
a4177869 | 1119 | dev_maps = xmap_dereference(dev->xps_maps); |
1d24eb48 TH |
1120 | |
1121 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
1122 | map = dev_maps ? |
1123 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
1124 | new_map = map; | |
1d24eb48 TH |
1125 | if (map) { |
1126 | for (pos = 0; pos < map->len; pos++) | |
1127 | if (map->queues[pos] == index) | |
1128 | break; | |
1129 | map_len = map->len; | |
1130 | alloc_len = map->alloc_len; | |
1131 | } else | |
1132 | pos = map_len = alloc_len = 0; | |
1133 | ||
2142c131 | 1134 | need_set = cpumask_test_cpu(cpu, mask) && cpu_online(cpu); |
f2cd2d3e ED |
1135 | #ifdef CONFIG_NUMA |
1136 | if (need_set) { | |
19b05f81 | 1137 | if (numa_node_id == -2) |
1138 | numa_node_id = cpu_to_node(cpu); | |
1139 | else if (numa_node_id != cpu_to_node(cpu)) | |
1140 | numa_node_id = -1; | |
f2cd2d3e ED |
1141 | } |
1142 | #endif | |
1d24eb48 TH |
1143 | if (need_set && pos >= map_len) { |
1144 | /* Need to add queue to this CPU's map */ | |
1145 | if (map_len >= alloc_len) { | |
1146 | alloc_len = alloc_len ? | |
1147 | 2 * alloc_len : XPS_MIN_MAP_ALLOC; | |
b02038a1 ED |
1148 | new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len), |
1149 | GFP_KERNEL, | |
1150 | cpu_to_node(cpu)); | |
1d24eb48 TH |
1151 | if (!new_map) |
1152 | goto error; | |
1153 | new_map->alloc_len = alloc_len; | |
1154 | for (i = 0; i < map_len; i++) | |
1155 | new_map->queues[i] = map->queues[i]; | |
1156 | new_map->len = map_len; | |
1157 | } | |
1158 | new_map->queues[new_map->len++] = index; | |
1159 | } else if (!need_set && pos < map_len) { | |
1160 | /* Need to remove queue from this CPU's map */ | |
1161 | if (map_len > 1) | |
1162 | new_map->queues[pos] = | |
1163 | new_map->queues[--new_map->len]; | |
1164 | else | |
1165 | new_map = NULL; | |
1166 | } | |
a4177869 | 1167 | RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map); |
1d24eb48 TH |
1168 | } |
1169 | ||
1170 | /* Cleanup old maps */ | |
1171 | for_each_possible_cpu(cpu) { | |
a4177869 ED |
1172 | map = dev_maps ? |
1173 | xmap_dereference(dev_maps->cpu_map[cpu]) : NULL; | |
1174 | if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map) | |
edc86d8a | 1175 | kfree_rcu(map, rcu); |
1d24eb48 TH |
1176 | if (new_dev_maps->cpu_map[cpu]) |
1177 | nonempty = 1; | |
1178 | } | |
1179 | ||
1180 | if (nonempty) | |
a9b3cd7f | 1181 | RCU_INIT_POINTER(dev->xps_maps, new_dev_maps); |
1d24eb48 TH |
1182 | else { |
1183 | kfree(new_dev_maps); | |
a9b3cd7f | 1184 | RCU_INIT_POINTER(dev->xps_maps, NULL); |
1d24eb48 TH |
1185 | } |
1186 | ||
1187 | if (dev_maps) | |
b55071eb | 1188 | kfree_rcu(dev_maps, rcu); |
1d24eb48 | 1189 | |
19b05f81 | 1190 | netdev_queue_numa_node_write(queue, (numa_node_id >= 0) ? numa_node_id : |
b236da69 | 1191 | NUMA_NO_NODE); |
f2cd2d3e | 1192 | |
1d24eb48 TH |
1193 | mutex_unlock(&xps_map_mutex); |
1194 | ||
1195 | free_cpumask_var(mask); | |
1196 | return len; | |
1197 | ||
1198 | error: | |
1199 | mutex_unlock(&xps_map_mutex); | |
1200 | ||
1201 | if (new_dev_maps) | |
1202 | for_each_possible_cpu(i) | |
a4177869 ED |
1203 | kfree(rcu_dereference_protected( |
1204 | new_dev_maps->cpu_map[i], | |
1205 | 1)); | |
1d24eb48 TH |
1206 | kfree(new_dev_maps); |
1207 | free_cpumask_var(mask); | |
1208 | return -ENOMEM; | |
1209 | } | |
1210 | ||
1211 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1212 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
ccf5ff69 | 1213 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1214 | |
1215 | static struct attribute *netdev_queue_default_attrs[] = { | |
ccf5ff69 | 1216 | &queue_trans_timeout.attr, |
1217 | #ifdef CONFIG_XPS | |
1d24eb48 | 1218 | &xps_cpus_attribute.attr, |
ccf5ff69 | 1219 | #endif |
1d24eb48 TH |
1220 | NULL |
1221 | }; | |
1222 | ||
1223 | static void netdev_queue_release(struct kobject *kobj) | |
1224 | { | |
1225 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1226 | |
114cf580 | 1227 | #ifdef CONFIG_XPS |
927fbec1 | 1228 | xps_queue_release(queue); |
114cf580 | 1229 | #endif |
1d24eb48 TH |
1230 | |
1231 | memset(kobj, 0, sizeof(*kobj)); | |
1232 | dev_put(queue->dev); | |
1233 | } | |
1234 | ||
1235 | static struct kobj_type netdev_queue_ktype = { | |
1236 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1237 | .release = netdev_queue_release, | |
1238 | .default_attrs = netdev_queue_default_attrs, | |
1239 | }; | |
1240 | ||
1241 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1242 | { | |
1243 | struct netdev_queue *queue = net->_tx + index; | |
1244 | struct kobject *kobj = &queue->kobj; | |
1245 | int error = 0; | |
1246 | ||
1247 | kobj->kset = net->queues_kset; | |
1248 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1249 | "tx-%u", index); | |
114cf580 TH |
1250 | if (error) |
1251 | goto exit; | |
1252 | ||
1253 | #ifdef CONFIG_BQL | |
1254 | error = sysfs_create_group(kobj, &dql_group); | |
1255 | if (error) | |
1256 | goto exit; | |
1257 | #endif | |
1d24eb48 TH |
1258 | |
1259 | kobject_uevent(kobj, KOBJ_ADD); | |
1260 | dev_hold(queue->dev); | |
1261 | ||
114cf580 TH |
1262 | return 0; |
1263 | exit: | |
1264 | kobject_put(kobj); | |
1d24eb48 TH |
1265 | return error; |
1266 | } | |
ccf5ff69 | 1267 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1268 | |
1269 | int | |
1270 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1271 | { | |
ccf5ff69 | 1272 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1273 | int i; |
1274 | int error = 0; | |
1275 | ||
1276 | for (i = old_num; i < new_num; i++) { | |
1277 | error = netdev_queue_add_kobject(net, i); | |
1278 | if (error) { | |
1279 | new_num = old_num; | |
1280 | break; | |
1281 | } | |
1282 | } | |
1283 | ||
114cf580 TH |
1284 | while (--i >= new_num) { |
1285 | struct netdev_queue *queue = net->_tx + i; | |
1286 | ||
1287 | #ifdef CONFIG_BQL | |
1288 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1289 | #endif | |
1290 | kobject_put(&queue->kobj); | |
1291 | } | |
1d24eb48 TH |
1292 | |
1293 | return error; | |
bf264145 TH |
1294 | #else |
1295 | return 0; | |
ccf5ff69 | 1296 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1297 | } |
1298 | ||
1299 | static int register_queue_kobjects(struct net_device *net) | |
1300 | { | |
bf264145 | 1301 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1302 | |
ccf5ff69 | 1303 | #ifdef CONFIG_SYSFS |
62fe0b40 BH |
1304 | net->queues_kset = kset_create_and_add("queues", |
1305 | NULL, &net->dev.kobj); | |
1306 | if (!net->queues_kset) | |
1307 | return -ENOMEM; | |
bf264145 TH |
1308 | #endif |
1309 | ||
1310 | #ifdef CONFIG_RPS | |
1311 | real_rx = net->real_num_rx_queues; | |
1312 | #endif | |
1313 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1314 | |
bf264145 | 1315 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1316 | if (error) |
1317 | goto error; | |
bf264145 | 1318 | rxq = real_rx; |
1d24eb48 | 1319 | |
bf264145 | 1320 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1321 | if (error) |
1322 | goto error; | |
bf264145 | 1323 | txq = real_tx; |
1d24eb48 TH |
1324 | |
1325 | return 0; | |
1326 | ||
1327 | error: | |
1328 | netdev_queue_update_kobjects(net, txq, 0); | |
1329 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1330 | return error; | |
62fe0b40 | 1331 | } |
0a9627f2 | 1332 | |
1d24eb48 | 1333 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1334 | { |
bf264145 TH |
1335 | int real_rx = 0, real_tx = 0; |
1336 | ||
1337 | #ifdef CONFIG_RPS | |
1338 | real_rx = net->real_num_rx_queues; | |
1339 | #endif | |
1340 | real_tx = net->real_num_tx_queues; | |
1341 | ||
1342 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1343 | netdev_queue_update_kobjects(net, real_tx, 0); | |
ccf5ff69 | 1344 | #ifdef CONFIG_SYSFS |
0a9627f2 | 1345 | kset_unregister(net->queues_kset); |
bf264145 | 1346 | #endif |
0a9627f2 | 1347 | } |
608b4b95 | 1348 | |
a685e089 | 1349 | static void *net_grab_current_ns(void) |
608b4b95 | 1350 | { |
a685e089 AV |
1351 | struct net *ns = current->nsproxy->net_ns; |
1352 | #ifdef CONFIG_NET_NS | |
1353 | if (ns) | |
1354 | atomic_inc(&ns->passive); | |
1355 | #endif | |
1356 | return ns; | |
608b4b95 EB |
1357 | } |
1358 | ||
1359 | static const void *net_initial_ns(void) | |
1360 | { | |
1361 | return &init_net; | |
1362 | } | |
1363 | ||
1364 | static const void *net_netlink_ns(struct sock *sk) | |
1365 | { | |
1366 | return sock_net(sk); | |
1367 | } | |
1368 | ||
04600794 | 1369 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1370 | .type = KOBJ_NS_TYPE_NET, |
a685e089 | 1371 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1372 | .netlink_ns = net_netlink_ns, |
1373 | .initial_ns = net_initial_ns, | |
a685e089 | 1374 | .drop_ns = net_drop_ns, |
608b4b95 | 1375 | }; |
04600794 | 1376 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1377 | |
1da177e4 | 1378 | #ifdef CONFIG_HOTPLUG |
7eff2e7a | 1379 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1380 | { |
43cb76d9 | 1381 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1382 | int retval; |
1da177e4 | 1383 | |
312c004d | 1384 | /* pass interface to uevent. */ |
7eff2e7a | 1385 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1386 | if (retval) |
1387 | goto exit; | |
ca2f37db JT |
1388 | |
1389 | /* pass ifindex to uevent. | |
1390 | * ifindex is useful as it won't change (interface name may change) | |
1391 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1392 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1393 | |
bf62456e | 1394 | exit: |
bf62456e | 1395 | return retval; |
1da177e4 LT |
1396 | } |
1397 | #endif | |
1398 | ||
1399 | /* | |
4ec93edb | 1400 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1401 | * Called when last reference to device kobject is gone. |
1da177e4 | 1402 | */ |
43cb76d9 | 1403 | static void netdev_release(struct device *d) |
1da177e4 | 1404 | { |
43cb76d9 | 1405 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1406 | |
1407 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1408 | ||
0b815a1a | 1409 | kfree(dev->ifalias); |
1da177e4 LT |
1410 | kfree((char *)dev - dev->padded); |
1411 | } | |
1412 | ||
608b4b95 EB |
1413 | static const void *net_namespace(struct device *d) |
1414 | { | |
1415 | struct net_device *dev; | |
1416 | dev = container_of(d, struct net_device, dev); | |
1417 | return dev_net(dev); | |
1418 | } | |
1419 | ||
1da177e4 LT |
1420 | static struct class net_class = { |
1421 | .name = "net", | |
43cb76d9 | 1422 | .dev_release = netdev_release, |
8b41d188 | 1423 | #ifdef CONFIG_SYSFS |
43cb76d9 | 1424 | .dev_attrs = net_class_attributes, |
8b41d188 | 1425 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1426 | #ifdef CONFIG_HOTPLUG |
43cb76d9 | 1427 | .dev_uevent = netdev_uevent, |
1da177e4 | 1428 | #endif |
608b4b95 EB |
1429 | .ns_type = &net_ns_type_operations, |
1430 | .namespace = net_namespace, | |
1da177e4 LT |
1431 | }; |
1432 | ||
9093bbb2 SH |
1433 | /* Delete sysfs entries but hold kobject reference until after all |
1434 | * netdev references are gone. | |
1435 | */ | |
8b41d188 | 1436 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1437 | { |
9093bbb2 SH |
1438 | struct device *dev = &(net->dev); |
1439 | ||
1440 | kobject_get(&dev->kobj); | |
3891845e | 1441 | |
1d24eb48 | 1442 | remove_queue_kobjects(net); |
0a9627f2 | 1443 | |
9093bbb2 | 1444 | device_del(dev); |
1da177e4 LT |
1445 | } |
1446 | ||
1447 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1448 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1449 | { |
43cb76d9 | 1450 | struct device *dev = &(net->dev); |
a4dbd674 | 1451 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1452 | int error = 0; |
1da177e4 | 1453 | |
a1b3f594 | 1454 | device_initialize(dev); |
43cb76d9 GKH |
1455 | dev->class = &net_class; |
1456 | dev->platform_data = net; | |
1457 | dev->groups = groups; | |
1da177e4 | 1458 | |
a2205472 | 1459 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1460 | |
8b41d188 | 1461 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1462 | /* Allow for a device specific group */ |
1463 | if (*groups) | |
1464 | groups++; | |
1da177e4 | 1465 | |
0c509a6c | 1466 | *groups++ = &netstat_group; |
22bb1be4 | 1467 | #ifdef CONFIG_WIRELESS_EXT_SYSFS |
3d23e349 | 1468 | if (net->ieee80211_ptr) |
fe9925b5 | 1469 | *groups++ = &wireless_group; |
3d23e349 JB |
1470 | #ifdef CONFIG_WIRELESS_EXT |
1471 | else if (net->wireless_handlers) | |
1472 | *groups++ = &wireless_group; | |
1473 | #endif | |
1da177e4 | 1474 | #endif |
8b41d188 | 1475 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1476 | |
0a9627f2 TH |
1477 | error = device_add(dev); |
1478 | if (error) | |
1479 | return error; | |
1480 | ||
1d24eb48 | 1481 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1482 | if (error) { |
1483 | device_del(dev); | |
1484 | return error; | |
1485 | } | |
1486 | ||
1487 | return error; | |
1da177e4 LT |
1488 | } |
1489 | ||
b8a9787e JV |
1490 | int netdev_class_create_file(struct class_attribute *class_attr) |
1491 | { | |
1492 | return class_create_file(&net_class, class_attr); | |
1493 | } | |
9e34a5b5 | 1494 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
1495 | |
1496 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
1497 | { | |
1498 | class_remove_file(&net_class, class_attr); | |
1499 | } | |
b8a9787e JV |
1500 | EXPORT_SYMBOL(netdev_class_remove_file); |
1501 | ||
8b41d188 | 1502 | int netdev_kobject_init(void) |
1da177e4 | 1503 | { |
608b4b95 | 1504 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1505 | return class_register(&net_class); |
1506 | } |