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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
4ec93edb | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/if_arp.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
608b4b95 | 17 | #include <linux/nsproxy.h> |
1da177e4 | 18 | #include <net/sock.h> |
608b4b95 | 19 | #include <net/net_namespace.h> |
1da177e4 | 20 | #include <linux/rtnetlink.h> |
fec5e652 | 21 | #include <linux/vmalloc.h> |
bc3b2d7f | 22 | #include <linux/export.h> |
114cf580 | 23 | #include <linux/jiffies.h> |
9802c8e2 | 24 | #include <linux/pm_runtime.h> |
1da177e4 | 25 | |
342709ef PE |
26 | #include "net-sysfs.h" |
27 | ||
8b41d188 | 28 | #ifdef CONFIG_SYSFS |
1da177e4 | 29 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 30 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 | 31 | static const char fmt_dec[] = "%d\n"; |
8ae6daca | 32 | static const char fmt_udec[] = "%u\n"; |
1da177e4 | 33 | static const char fmt_ulong[] = "%lu\n"; |
be1f3c2c | 34 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 35 | |
4ec93edb | 36 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 37 | { |
fe9925b5 | 38 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
39 | } |
40 | ||
41 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
42 | static ssize_t netdev_show(const struct device *dev, |
43 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
44 | ssize_t (*format)(const struct net_device *, char *)) |
45 | { | |
43cb76d9 | 46 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
47 | ssize_t ret = -EINVAL; |
48 | ||
49 | read_lock(&dev_base_lock); | |
50 | if (dev_isalive(net)) | |
51 | ret = (*format)(net, buf); | |
52 | read_unlock(&dev_base_lock); | |
53 | ||
54 | return ret; | |
55 | } | |
56 | ||
57 | /* generate a show function for simple field */ | |
58 | #define NETDEVICE_SHOW(field, format_string) \ | |
59 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
60 | { \ | |
61 | return sprintf(buf, format_string, net->field); \ | |
62 | } \ | |
43cb76d9 GKH |
63 | static ssize_t show_##field(struct device *dev, \ |
64 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 65 | { \ |
43cb76d9 | 66 | return netdev_show(dev, attr, buf, format_##field); \ |
1da177e4 LT |
67 | } |
68 | ||
69 | ||
70 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 71 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
72 | const char *buf, size_t len, |
73 | int (*set)(struct net_device *, unsigned long)) | |
74 | { | |
5e1fccc0 EB |
75 | struct net_device *netdev = to_net_dev(dev); |
76 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
77 | unsigned long new; |
78 | int ret = -EINVAL; | |
79 | ||
5e1fccc0 | 80 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
81 | return -EPERM; |
82 | ||
e1e420c7 SK |
83 | ret = kstrtoul(buf, 0, &new); |
84 | if (ret) | |
1da177e4 LT |
85 | goto err; |
86 | ||
5a5990d3 | 87 | if (!rtnl_trylock()) |
336ca57c | 88 | return restart_syscall(); |
5a5990d3 | 89 | |
5e1fccc0 EB |
90 | if (dev_isalive(netdev)) { |
91 | if ((ret = (*set)(netdev, new)) == 0) | |
1da177e4 LT |
92 | ret = len; |
93 | } | |
94 | rtnl_unlock(); | |
95 | err: | |
96 | return ret; | |
97 | } | |
98 | ||
9d29672c | 99 | NETDEVICE_SHOW(dev_id, fmt_hex); |
c1f79426 | 100 | NETDEVICE_SHOW(addr_assign_type, fmt_dec); |
fd586bac KS |
101 | NETDEVICE_SHOW(addr_len, fmt_dec); |
102 | NETDEVICE_SHOW(iflink, fmt_dec); | |
103 | NETDEVICE_SHOW(ifindex, fmt_dec); | |
fd586bac | 104 | NETDEVICE_SHOW(type, fmt_dec); |
b00055aa | 105 | NETDEVICE_SHOW(link_mode, fmt_dec); |
1da177e4 LT |
106 | |
107 | /* use same locking rules as GIFHWADDR ioctl's */ | |
43cb76d9 GKH |
108 | static ssize_t show_address(struct device *dev, struct device_attribute *attr, |
109 | char *buf) | |
1da177e4 LT |
110 | { |
111 | struct net_device *net = to_net_dev(dev); | |
112 | ssize_t ret = -EINVAL; | |
113 | ||
114 | read_lock(&dev_base_lock); | |
115 | if (dev_isalive(net)) | |
7ffc49a6 | 116 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
117 | read_unlock(&dev_base_lock); |
118 | return ret; | |
119 | } | |
120 | ||
43cb76d9 GKH |
121 | static ssize_t show_broadcast(struct device *dev, |
122 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
123 | { |
124 | struct net_device *net = to_net_dev(dev); | |
125 | if (dev_isalive(net)) | |
7ffc49a6 | 126 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
127 | return -EINVAL; |
128 | } | |
129 | ||
fdae0fde JP |
130 | static int change_carrier(struct net_device *net, unsigned long new_carrier) |
131 | { | |
132 | if (!netif_running(net)) | |
133 | return -EINVAL; | |
134 | return dev_change_carrier(net, (bool) new_carrier); | |
135 | } | |
136 | ||
137 | static ssize_t store_carrier(struct device *dev, struct device_attribute *attr, | |
138 | const char *buf, size_t len) | |
139 | { | |
140 | return netdev_store(dev, attr, buf, len, change_carrier); | |
141 | } | |
142 | ||
43cb76d9 GKH |
143 | static ssize_t show_carrier(struct device *dev, |
144 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
145 | { |
146 | struct net_device *netdev = to_net_dev(dev); | |
147 | if (netif_running(netdev)) { | |
148 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
149 | } | |
150 | return -EINVAL; | |
151 | } | |
152 | ||
d519e17e AG |
153 | static ssize_t show_speed(struct device *dev, |
154 | struct device_attribute *attr, char *buf) | |
155 | { | |
156 | struct net_device *netdev = to_net_dev(dev); | |
157 | int ret = -EINVAL; | |
158 | ||
159 | if (!rtnl_trylock()) | |
160 | return restart_syscall(); | |
161 | ||
8ae6daca DD |
162 | if (netif_running(netdev)) { |
163 | struct ethtool_cmd cmd; | |
4bc71cb9 | 164 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca | 165 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); |
d519e17e AG |
166 | } |
167 | rtnl_unlock(); | |
168 | return ret; | |
169 | } | |
170 | ||
171 | static ssize_t show_duplex(struct device *dev, | |
172 | struct device_attribute *attr, char *buf) | |
173 | { | |
174 | struct net_device *netdev = to_net_dev(dev); | |
175 | int ret = -EINVAL; | |
176 | ||
177 | if (!rtnl_trylock()) | |
178 | return restart_syscall(); | |
179 | ||
8ae6daca DD |
180 | if (netif_running(netdev)) { |
181 | struct ethtool_cmd cmd; | |
c6c13965 NA |
182 | if (!__ethtool_get_settings(netdev, &cmd)) { |
183 | const char *duplex; | |
184 | switch (cmd.duplex) { | |
185 | case DUPLEX_HALF: | |
186 | duplex = "half"; | |
187 | break; | |
188 | case DUPLEX_FULL: | |
189 | duplex = "full"; | |
190 | break; | |
191 | default: | |
192 | duplex = "unknown"; | |
193 | break; | |
194 | } | |
195 | ret = sprintf(buf, "%s\n", duplex); | |
196 | } | |
d519e17e AG |
197 | } |
198 | rtnl_unlock(); | |
199 | return ret; | |
200 | } | |
201 | ||
43cb76d9 GKH |
202 | static ssize_t show_dormant(struct device *dev, |
203 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
204 | { |
205 | struct net_device *netdev = to_net_dev(dev); | |
206 | ||
207 | if (netif_running(netdev)) | |
208 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
209 | ||
210 | return -EINVAL; | |
211 | } | |
212 | ||
36cbd3dc | 213 | static const char *const operstates[] = { |
b00055aa SR |
214 | "unknown", |
215 | "notpresent", /* currently unused */ | |
216 | "down", | |
217 | "lowerlayerdown", | |
218 | "testing", /* currently unused */ | |
219 | "dormant", | |
220 | "up" | |
221 | }; | |
222 | ||
43cb76d9 GKH |
223 | static ssize_t show_operstate(struct device *dev, |
224 | struct device_attribute *attr, char *buf) | |
b00055aa SR |
225 | { |
226 | const struct net_device *netdev = to_net_dev(dev); | |
227 | unsigned char operstate; | |
228 | ||
229 | read_lock(&dev_base_lock); | |
230 | operstate = netdev->operstate; | |
231 | if (!netif_running(netdev)) | |
232 | operstate = IF_OPER_DOWN; | |
233 | read_unlock(&dev_base_lock); | |
234 | ||
e3a5cd9e | 235 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
236 | return -EINVAL; /* should not happen */ |
237 | ||
238 | return sprintf(buf, "%s\n", operstates[operstate]); | |
239 | } | |
240 | ||
1da177e4 LT |
241 | /* read-write attributes */ |
242 | NETDEVICE_SHOW(mtu, fmt_dec); | |
243 | ||
244 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
245 | { | |
246 | return dev_set_mtu(net, (int) new_mtu); | |
247 | } | |
248 | ||
43cb76d9 GKH |
249 | static ssize_t store_mtu(struct device *dev, struct device_attribute *attr, |
250 | const char *buf, size_t len) | |
1da177e4 | 251 | { |
43cb76d9 | 252 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 LT |
253 | } |
254 | ||
1da177e4 LT |
255 | NETDEVICE_SHOW(flags, fmt_hex); |
256 | ||
257 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
258 | { | |
95c96174 | 259 | return dev_change_flags(net, (unsigned int) new_flags); |
1da177e4 LT |
260 | } |
261 | ||
43cb76d9 GKH |
262 | static ssize_t store_flags(struct device *dev, struct device_attribute *attr, |
263 | const char *buf, size_t len) | |
1da177e4 | 264 | { |
43cb76d9 | 265 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 LT |
266 | } |
267 | ||
1da177e4 LT |
268 | NETDEVICE_SHOW(tx_queue_len, fmt_ulong); |
269 | ||
270 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
271 | { | |
272 | net->tx_queue_len = new_len; | |
273 | return 0; | |
274 | } | |
275 | ||
43cb76d9 GKH |
276 | static ssize_t store_tx_queue_len(struct device *dev, |
277 | struct device_attribute *attr, | |
278 | const char *buf, size_t len) | |
1da177e4 | 279 | { |
5e1fccc0 EB |
280 | if (!capable(CAP_NET_ADMIN)) |
281 | return -EPERM; | |
282 | ||
43cb76d9 | 283 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 LT |
284 | } |
285 | ||
0b815a1a SH |
286 | static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr, |
287 | const char *buf, size_t len) | |
288 | { | |
289 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 290 | struct net *net = dev_net(netdev); |
0b815a1a SH |
291 | size_t count = len; |
292 | ssize_t ret; | |
293 | ||
5e1fccc0 | 294 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
295 | return -EPERM; |
296 | ||
297 | /* ignore trailing newline */ | |
298 | if (len > 0 && buf[len - 1] == '\n') | |
299 | --count; | |
300 | ||
336ca57c EB |
301 | if (!rtnl_trylock()) |
302 | return restart_syscall(); | |
0b815a1a SH |
303 | ret = dev_set_alias(netdev, buf, count); |
304 | rtnl_unlock(); | |
305 | ||
306 | return ret < 0 ? ret : len; | |
307 | } | |
308 | ||
309 | static ssize_t show_ifalias(struct device *dev, | |
310 | struct device_attribute *attr, char *buf) | |
311 | { | |
312 | const struct net_device *netdev = to_net_dev(dev); | |
313 | ssize_t ret = 0; | |
314 | ||
336ca57c EB |
315 | if (!rtnl_trylock()) |
316 | return restart_syscall(); | |
0b815a1a SH |
317 | if (netdev->ifalias) |
318 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
319 | rtnl_unlock(); | |
320 | return ret; | |
321 | } | |
322 | ||
a512b92b VD |
323 | NETDEVICE_SHOW(group, fmt_dec); |
324 | ||
325 | static int change_group(struct net_device *net, unsigned long new_group) | |
326 | { | |
327 | dev_set_group(net, (int) new_group); | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static ssize_t store_group(struct device *dev, struct device_attribute *attr, | |
332 | const char *buf, size_t len) | |
333 | { | |
334 | return netdev_store(dev, attr, buf, len, change_group); | |
335 | } | |
336 | ||
ff80e519 JP |
337 | static ssize_t show_phys_port_id(struct device *dev, |
338 | struct device_attribute *attr, char *buf) | |
339 | { | |
340 | struct net_device *netdev = to_net_dev(dev); | |
341 | ssize_t ret = -EINVAL; | |
342 | ||
343 | if (!rtnl_trylock()) | |
344 | return restart_syscall(); | |
345 | ||
346 | if (dev_isalive(netdev)) { | |
347 | struct netdev_phys_port_id ppid; | |
348 | ||
349 | ret = dev_get_phys_port_id(netdev, &ppid); | |
350 | if (!ret) | |
351 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
352 | } | |
353 | rtnl_unlock(); | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
43cb76d9 | 358 | static struct device_attribute net_class_attributes[] = { |
c1f79426 | 359 | __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL), |
fd586bac | 360 | __ATTR(addr_len, S_IRUGO, show_addr_len, NULL), |
9d29672c | 361 | __ATTR(dev_id, S_IRUGO, show_dev_id, NULL), |
0b815a1a | 362 | __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias), |
fd586bac KS |
363 | __ATTR(iflink, S_IRUGO, show_iflink, NULL), |
364 | __ATTR(ifindex, S_IRUGO, show_ifindex, NULL), | |
fd586bac | 365 | __ATTR(type, S_IRUGO, show_type, NULL), |
b00055aa | 366 | __ATTR(link_mode, S_IRUGO, show_link_mode, NULL), |
fd586bac KS |
367 | __ATTR(address, S_IRUGO, show_address, NULL), |
368 | __ATTR(broadcast, S_IRUGO, show_broadcast, NULL), | |
fdae0fde | 369 | __ATTR(carrier, S_IRUGO | S_IWUSR, show_carrier, store_carrier), |
d519e17e AG |
370 | __ATTR(speed, S_IRUGO, show_speed, NULL), |
371 | __ATTR(duplex, S_IRUGO, show_duplex, NULL), | |
b00055aa SR |
372 | __ATTR(dormant, S_IRUGO, show_dormant, NULL), |
373 | __ATTR(operstate, S_IRUGO, show_operstate, NULL), | |
fd586bac KS |
374 | __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu), |
375 | __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags), | |
376 | __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len, | |
377 | store_tx_queue_len), | |
b6644cb7 | 378 | __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group), |
ff80e519 | 379 | __ATTR(phys_port_id, S_IRUGO, show_phys_port_id, NULL), |
fd586bac | 380 | {} |
1da177e4 LT |
381 | }; |
382 | ||
383 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
384 | static ssize_t netstat_show(const struct device *d, |
385 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
386 | unsigned long offset) |
387 | { | |
43cb76d9 | 388 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
389 | ssize_t ret = -EINVAL; |
390 | ||
be1f3c2c BH |
391 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
392 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
393 | |
394 | read_lock(&dev_base_lock); | |
96e74088 | 395 | if (dev_isalive(dev)) { |
28172739 ED |
396 | struct rtnl_link_stats64 temp; |
397 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
398 | ||
be1f3c2c | 399 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 400 | } |
1da177e4 LT |
401 | read_unlock(&dev_base_lock); |
402 | return ret; | |
403 | } | |
404 | ||
405 | /* generate a read-only statistics attribute */ | |
406 | #define NETSTAT_ENTRY(name) \ | |
43cb76d9 GKH |
407 | static ssize_t show_##name(struct device *d, \ |
408 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 409 | { \ |
43cb76d9 | 410 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 411 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 412 | } \ |
43cb76d9 | 413 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) |
1da177e4 LT |
414 | |
415 | NETSTAT_ENTRY(rx_packets); | |
416 | NETSTAT_ENTRY(tx_packets); | |
417 | NETSTAT_ENTRY(rx_bytes); | |
418 | NETSTAT_ENTRY(tx_bytes); | |
419 | NETSTAT_ENTRY(rx_errors); | |
420 | NETSTAT_ENTRY(tx_errors); | |
421 | NETSTAT_ENTRY(rx_dropped); | |
422 | NETSTAT_ENTRY(tx_dropped); | |
423 | NETSTAT_ENTRY(multicast); | |
424 | NETSTAT_ENTRY(collisions); | |
425 | NETSTAT_ENTRY(rx_length_errors); | |
426 | NETSTAT_ENTRY(rx_over_errors); | |
427 | NETSTAT_ENTRY(rx_crc_errors); | |
428 | NETSTAT_ENTRY(rx_frame_errors); | |
429 | NETSTAT_ENTRY(rx_fifo_errors); | |
430 | NETSTAT_ENTRY(rx_missed_errors); | |
431 | NETSTAT_ENTRY(tx_aborted_errors); | |
432 | NETSTAT_ENTRY(tx_carrier_errors); | |
433 | NETSTAT_ENTRY(tx_fifo_errors); | |
434 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
435 | NETSTAT_ENTRY(tx_window_errors); | |
436 | NETSTAT_ENTRY(rx_compressed); | |
437 | NETSTAT_ENTRY(tx_compressed); | |
438 | ||
439 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
440 | &dev_attr_rx_packets.attr, |
441 | &dev_attr_tx_packets.attr, | |
442 | &dev_attr_rx_bytes.attr, | |
443 | &dev_attr_tx_bytes.attr, | |
444 | &dev_attr_rx_errors.attr, | |
445 | &dev_attr_tx_errors.attr, | |
446 | &dev_attr_rx_dropped.attr, | |
447 | &dev_attr_tx_dropped.attr, | |
448 | &dev_attr_multicast.attr, | |
449 | &dev_attr_collisions.attr, | |
450 | &dev_attr_rx_length_errors.attr, | |
451 | &dev_attr_rx_over_errors.attr, | |
452 | &dev_attr_rx_crc_errors.attr, | |
453 | &dev_attr_rx_frame_errors.attr, | |
454 | &dev_attr_rx_fifo_errors.attr, | |
455 | &dev_attr_rx_missed_errors.attr, | |
456 | &dev_attr_tx_aborted_errors.attr, | |
457 | &dev_attr_tx_carrier_errors.attr, | |
458 | &dev_attr_tx_fifo_errors.attr, | |
459 | &dev_attr_tx_heartbeat_errors.attr, | |
460 | &dev_attr_tx_window_errors.attr, | |
461 | &dev_attr_rx_compressed.attr, | |
462 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
463 | NULL |
464 | }; | |
465 | ||
466 | ||
467 | static struct attribute_group netstat_group = { | |
468 | .name = "statistics", | |
469 | .attrs = netstat_attrs, | |
470 | }; | |
38c1a01c JB |
471 | |
472 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
473 | static struct attribute *wireless_attrs[] = { | |
474 | NULL | |
475 | }; | |
476 | ||
477 | static struct attribute_group wireless_group = { | |
478 | .name = "wireless", | |
479 | .attrs = wireless_attrs, | |
480 | }; | |
481 | #endif | |
d6523ddf | 482 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 483 | |
30bde1f5 | 484 | #ifdef CONFIG_RPS |
0a9627f2 TH |
485 | /* |
486 | * RX queue sysfs structures and functions. | |
487 | */ | |
488 | struct rx_queue_attribute { | |
489 | struct attribute attr; | |
490 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
491 | struct rx_queue_attribute *attr, char *buf); | |
492 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
493 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
494 | }; | |
495 | #define to_rx_queue_attr(_attr) container_of(_attr, \ | |
496 | struct rx_queue_attribute, attr) | |
497 | ||
498 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
499 | ||
500 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
501 | char *buf) | |
502 | { | |
503 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
504 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
505 | ||
506 | if (!attribute->show) | |
507 | return -EIO; | |
508 | ||
509 | return attribute->show(queue, attribute, buf); | |
510 | } | |
511 | ||
512 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
513 | const char *buf, size_t count) | |
514 | { | |
515 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
516 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
517 | ||
518 | if (!attribute->store) | |
519 | return -EIO; | |
520 | ||
521 | return attribute->store(queue, attribute, buf, count); | |
522 | } | |
523 | ||
fa50d645 | 524 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
525 | .show = rx_queue_attr_show, |
526 | .store = rx_queue_attr_store, | |
527 | }; | |
528 | ||
529 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, | |
530 | struct rx_queue_attribute *attribute, char *buf) | |
531 | { | |
532 | struct rps_map *map; | |
533 | cpumask_var_t mask; | |
534 | size_t len = 0; | |
535 | int i; | |
536 | ||
537 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
538 | return -ENOMEM; | |
539 | ||
540 | rcu_read_lock(); | |
541 | map = rcu_dereference(queue->rps_map); | |
542 | if (map) | |
543 | for (i = 0; i < map->len; i++) | |
544 | cpumask_set_cpu(map->cpus[i], mask); | |
545 | ||
546 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
547 | if (PAGE_SIZE - len < 3) { | |
548 | rcu_read_unlock(); | |
549 | free_cpumask_var(mask); | |
550 | return -EINVAL; | |
551 | } | |
552 | rcu_read_unlock(); | |
553 | ||
554 | free_cpumask_var(mask); | |
555 | len += sprintf(buf + len, "\n"); | |
556 | return len; | |
557 | } | |
558 | ||
f5acb907 | 559 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
560 | struct rx_queue_attribute *attribute, |
561 | const char *buf, size_t len) | |
562 | { | |
563 | struct rps_map *old_map, *map; | |
564 | cpumask_var_t mask; | |
565 | int err, cpu, i; | |
566 | static DEFINE_SPINLOCK(rps_map_lock); | |
567 | ||
568 | if (!capable(CAP_NET_ADMIN)) | |
569 | return -EPERM; | |
570 | ||
571 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
572 | return -ENOMEM; | |
573 | ||
574 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
575 | if (err) { | |
576 | free_cpumask_var(mask); | |
577 | return err; | |
578 | } | |
579 | ||
95c96174 | 580 | map = kzalloc(max_t(unsigned int, |
0a9627f2 TH |
581 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
582 | GFP_KERNEL); | |
583 | if (!map) { | |
584 | free_cpumask_var(mask); | |
585 | return -ENOMEM; | |
586 | } | |
587 | ||
588 | i = 0; | |
589 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
590 | map->cpus[i++] = cpu; | |
591 | ||
592 | if (i) | |
593 | map->len = i; | |
594 | else { | |
595 | kfree(map); | |
596 | map = NULL; | |
597 | } | |
598 | ||
599 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
600 | old_map = rcu_dereference_protected(queue->rps_map, |
601 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
602 | rcu_assign_pointer(queue->rps_map, map); |
603 | spin_unlock(&rps_map_lock); | |
604 | ||
adc9300e | 605 | if (map) |
c5905afb | 606 | static_key_slow_inc(&rps_needed); |
adc9300e | 607 | if (old_map) { |
f6f80238 | 608 | kfree_rcu(old_map, rcu); |
c5905afb | 609 | static_key_slow_dec(&rps_needed); |
adc9300e | 610 | } |
0a9627f2 TH |
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; | |
60b778ce | 620 | unsigned long val = 0; |
fec5e652 TH |
621 | |
622 | rcu_read_lock(); | |
623 | flow_table = rcu_dereference(queue->rps_flow_table); | |
624 | if (flow_table) | |
60b778ce | 625 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
626 | rcu_read_unlock(); |
627 | ||
60b778ce | 628 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
629 | } |
630 | ||
fec5e652 TH |
631 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
632 | { | |
633 | struct rps_dev_flow_table *table = container_of(rcu, | |
634 | struct rps_dev_flow_table, rcu); | |
243198d0 | 635 | vfree(table); |
fec5e652 TH |
636 | } |
637 | ||
f5acb907 | 638 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
639 | struct rx_queue_attribute *attr, |
640 | const char *buf, size_t len) | |
641 | { | |
60b778ce | 642 | unsigned long mask, count; |
fec5e652 TH |
643 | struct rps_dev_flow_table *table, *old_table; |
644 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 645 | int rc; |
fec5e652 TH |
646 | |
647 | if (!capable(CAP_NET_ADMIN)) | |
648 | return -EPERM; | |
649 | ||
60b778ce ED |
650 | rc = kstrtoul(buf, 0, &count); |
651 | if (rc < 0) | |
652 | return rc; | |
fec5e652 TH |
653 | |
654 | if (count) { | |
60b778ce ED |
655 | mask = count - 1; |
656 | /* mask = roundup_pow_of_two(count) - 1; | |
657 | * without overflows... | |
658 | */ | |
659 | while ((mask | (mask >> 1)) != mask) | |
660 | mask |= (mask >> 1); | |
661 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
662 | * and on 32bit arches, must check RPS_DEV_FLOW_TABLE_SIZE(mask + 1) | |
663 | * doesnt overflow. | |
664 | */ | |
665 | #if BITS_PER_LONG > 32 | |
666 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 667 | return -EINVAL; |
60b778ce ED |
668 | #else |
669 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 670 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
671 | /* Enforce a limit to prevent overflow */ |
672 | return -EINVAL; | |
673 | } | |
60b778ce ED |
674 | #endif |
675 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
676 | if (!table) |
677 | return -ENOMEM; | |
678 | ||
60b778ce ED |
679 | table->mask = mask; |
680 | for (count = 0; count <= mask; count++) | |
681 | table->flows[count].cpu = RPS_NO_CPU; | |
fec5e652 TH |
682 | } else |
683 | table = NULL; | |
684 | ||
685 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
686 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
687 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
688 | rcu_assign_pointer(queue->rps_flow_table, table); |
689 | spin_unlock(&rps_dev_flow_lock); | |
690 | ||
691 | if (old_table) | |
692 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
693 | ||
694 | return len; | |
695 | } | |
696 | ||
0a9627f2 TH |
697 | static struct rx_queue_attribute rps_cpus_attribute = |
698 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
699 | ||
fec5e652 TH |
700 | |
701 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
702 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
703 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
704 | ||
0a9627f2 TH |
705 | static struct attribute *rx_queue_default_attrs[] = { |
706 | &rps_cpus_attribute.attr, | |
fec5e652 | 707 | &rps_dev_flow_table_cnt_attribute.attr, |
0a9627f2 TH |
708 | NULL |
709 | }; | |
710 | ||
711 | static void rx_queue_release(struct kobject *kobj) | |
712 | { | |
713 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
6e3f7faf ED |
714 | struct rps_map *map; |
715 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 716 | |
fec5e652 | 717 | |
33d480ce | 718 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
719 | if (map) { |
720 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 721 | kfree_rcu(map, rcu); |
9ea19481 | 722 | } |
6e3f7faf | 723 | |
33d480ce | 724 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
725 | if (flow_table) { |
726 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 727 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 728 | } |
0a9627f2 | 729 | |
9ea19481 | 730 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 731 | dev_put(queue->dev); |
0a9627f2 TH |
732 | } |
733 | ||
734 | static struct kobj_type rx_queue_ktype = { | |
735 | .sysfs_ops = &rx_queue_sysfs_ops, | |
736 | .release = rx_queue_release, | |
737 | .default_attrs = rx_queue_default_attrs, | |
738 | }; | |
739 | ||
740 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
741 | { | |
742 | struct netdev_rx_queue *queue = net->_rx + index; | |
743 | struct kobject *kobj = &queue->kobj; | |
744 | int error = 0; | |
745 | ||
746 | kobj->kset = net->queues_kset; | |
747 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
748 | "rx-%u", index); | |
749 | if (error) { | |
750 | kobject_put(kobj); | |
751 | return error; | |
752 | } | |
753 | ||
754 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 755 | dev_hold(queue->dev); |
0a9627f2 TH |
756 | |
757 | return error; | |
758 | } | |
bf264145 | 759 | #endif /* CONFIG_RPS */ |
0a9627f2 | 760 | |
62fe0b40 BH |
761 | int |
762 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 763 | { |
bf264145 | 764 | #ifdef CONFIG_RPS |
0a9627f2 TH |
765 | int i; |
766 | int error = 0; | |
767 | ||
62fe0b40 | 768 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 769 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
770 | if (error) { |
771 | new_num = old_num; | |
0a9627f2 | 772 | break; |
62fe0b40 | 773 | } |
0a9627f2 TH |
774 | } |
775 | ||
62fe0b40 BH |
776 | while (--i >= new_num) |
777 | kobject_put(&net->_rx[i].kobj); | |
0a9627f2 TH |
778 | |
779 | return error; | |
bf264145 TH |
780 | #else |
781 | return 0; | |
782 | #endif | |
0a9627f2 TH |
783 | } |
784 | ||
ccf5ff69 | 785 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
786 | /* |
787 | * netdev_queue sysfs structures and functions. | |
788 | */ | |
789 | struct netdev_queue_attribute { | |
790 | struct attribute attr; | |
791 | ssize_t (*show)(struct netdev_queue *queue, | |
792 | struct netdev_queue_attribute *attr, char *buf); | |
793 | ssize_t (*store)(struct netdev_queue *queue, | |
794 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
795 | }; | |
796 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
797 | struct netdev_queue_attribute, attr) | |
798 | ||
799 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
800 | ||
801 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
802 | struct attribute *attr, char *buf) | |
803 | { | |
804 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
805 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
806 | ||
807 | if (!attribute->show) | |
808 | return -EIO; | |
809 | ||
810 | return attribute->show(queue, attribute, buf); | |
811 | } | |
812 | ||
813 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
814 | struct attribute *attr, | |
815 | const char *buf, size_t count) | |
816 | { | |
817 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
818 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
819 | ||
820 | if (!attribute->store) | |
821 | return -EIO; | |
822 | ||
823 | return attribute->store(queue, attribute, buf, count); | |
824 | } | |
825 | ||
826 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
827 | .show = netdev_queue_attr_show, | |
828 | .store = netdev_queue_attr_store, | |
829 | }; | |
830 | ||
ccf5ff69 | 831 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
832 | struct netdev_queue_attribute *attribute, | |
833 | char *buf) | |
834 | { | |
835 | unsigned long trans_timeout; | |
836 | ||
837 | spin_lock_irq(&queue->_xmit_lock); | |
838 | trans_timeout = queue->trans_timeout; | |
839 | spin_unlock_irq(&queue->_xmit_lock); | |
840 | ||
841 | return sprintf(buf, "%lu", trans_timeout); | |
842 | } | |
843 | ||
844 | static struct netdev_queue_attribute queue_trans_timeout = | |
845 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); | |
846 | ||
114cf580 TH |
847 | #ifdef CONFIG_BQL |
848 | /* | |
849 | * Byte queue limits sysfs structures and functions. | |
850 | */ | |
851 | static ssize_t bql_show(char *buf, unsigned int value) | |
852 | { | |
853 | return sprintf(buf, "%u\n", value); | |
854 | } | |
855 | ||
856 | static ssize_t bql_set(const char *buf, const size_t count, | |
857 | unsigned int *pvalue) | |
858 | { | |
859 | unsigned int value; | |
860 | int err; | |
861 | ||
862 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) | |
863 | value = DQL_MAX_LIMIT; | |
864 | else { | |
865 | err = kstrtouint(buf, 10, &value); | |
866 | if (err < 0) | |
867 | return err; | |
868 | if (value > DQL_MAX_LIMIT) | |
869 | return -EINVAL; | |
870 | } | |
871 | ||
872 | *pvalue = value; | |
873 | ||
874 | return count; | |
875 | } | |
876 | ||
877 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
878 | struct netdev_queue_attribute *attr, | |
879 | char *buf) | |
880 | { | |
881 | struct dql *dql = &queue->dql; | |
882 | ||
883 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
884 | } | |
885 | ||
886 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
887 | struct netdev_queue_attribute *attribute, | |
888 | const char *buf, size_t len) | |
889 | { | |
890 | struct dql *dql = &queue->dql; | |
95c96174 | 891 | unsigned int value; |
114cf580 TH |
892 | int err; |
893 | ||
894 | err = kstrtouint(buf, 10, &value); | |
895 | if (err < 0) | |
896 | return err; | |
897 | ||
898 | dql->slack_hold_time = msecs_to_jiffies(value); | |
899 | ||
900 | return len; | |
901 | } | |
902 | ||
903 | static struct netdev_queue_attribute bql_hold_time_attribute = | |
904 | __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, | |
905 | bql_set_hold_time); | |
906 | ||
907 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
908 | struct netdev_queue_attribute *attr, | |
909 | char *buf) | |
910 | { | |
911 | struct dql *dql = &queue->dql; | |
912 | ||
913 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
914 | } | |
915 | ||
916 | static struct netdev_queue_attribute bql_inflight_attribute = | |
795d9a25 | 917 | __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); |
114cf580 TH |
918 | |
919 | #define BQL_ATTR(NAME, FIELD) \ | |
920 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
921 | struct netdev_queue_attribute *attr, \ | |
922 | char *buf) \ | |
923 | { \ | |
924 | return bql_show(buf, queue->dql.FIELD); \ | |
925 | } \ | |
926 | \ | |
927 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
928 | struct netdev_queue_attribute *attr, \ | |
929 | const char *buf, size_t len) \ | |
930 | { \ | |
931 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
932 | } \ | |
933 | \ | |
934 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ | |
935 | __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ | |
936 | bql_set_ ## NAME); | |
937 | ||
938 | BQL_ATTR(limit, limit) | |
939 | BQL_ATTR(limit_max, max_limit) | |
940 | BQL_ATTR(limit_min, min_limit) | |
941 | ||
942 | static struct attribute *dql_attrs[] = { | |
943 | &bql_limit_attribute.attr, | |
944 | &bql_limit_max_attribute.attr, | |
945 | &bql_limit_min_attribute.attr, | |
946 | &bql_hold_time_attribute.attr, | |
947 | &bql_inflight_attribute.attr, | |
948 | NULL | |
949 | }; | |
950 | ||
951 | static struct attribute_group dql_group = { | |
952 | .name = "byte_queue_limits", | |
953 | .attrs = dql_attrs, | |
954 | }; | |
955 | #endif /* CONFIG_BQL */ | |
956 | ||
ccf5ff69 | 957 | #ifdef CONFIG_XPS |
1d24eb48 | 958 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
0a9627f2 | 959 | { |
1d24eb48 TH |
960 | struct net_device *dev = queue->dev; |
961 | int i; | |
962 | ||
963 | for (i = 0; i < dev->num_tx_queues; i++) | |
964 | if (queue == &dev->_tx[i]) | |
965 | break; | |
966 | ||
967 | BUG_ON(i >= dev->num_tx_queues); | |
968 | ||
969 | return i; | |
970 | } | |
971 | ||
972 | ||
973 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
974 | struct netdev_queue_attribute *attribute, char *buf) | |
975 | { | |
976 | struct net_device *dev = queue->dev; | |
977 | struct xps_dev_maps *dev_maps; | |
978 | cpumask_var_t mask; | |
979 | unsigned long index; | |
980 | size_t len = 0; | |
981 | int i; | |
982 | ||
983 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
984 | return -ENOMEM; | |
985 | ||
986 | index = get_netdev_queue_index(queue); | |
987 | ||
988 | rcu_read_lock(); | |
989 | dev_maps = rcu_dereference(dev->xps_maps); | |
990 | if (dev_maps) { | |
991 | for_each_possible_cpu(i) { | |
992 | struct xps_map *map = | |
993 | rcu_dereference(dev_maps->cpu_map[i]); | |
994 | if (map) { | |
995 | int j; | |
996 | for (j = 0; j < map->len; j++) { | |
997 | if (map->queues[j] == index) { | |
998 | cpumask_set_cpu(i, mask); | |
999 | break; | |
1000 | } | |
1001 | } | |
1002 | } | |
1003 | } | |
1004 | } | |
1005 | rcu_read_unlock(); | |
1006 | ||
1007 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
1008 | if (PAGE_SIZE - len < 3) { | |
1009 | free_cpumask_var(mask); | |
1010 | return -EINVAL; | |
1011 | } | |
1012 | ||
1013 | free_cpumask_var(mask); | |
1014 | len += sprintf(buf + len, "\n"); | |
1015 | return len; | |
1016 | } | |
1017 | ||
1d24eb48 TH |
1018 | static ssize_t store_xps_map(struct netdev_queue *queue, |
1019 | struct netdev_queue_attribute *attribute, | |
1020 | const char *buf, size_t len) | |
1021 | { | |
1022 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1023 | unsigned long index; |
537c00de AD |
1024 | cpumask_var_t mask; |
1025 | int err; | |
1d24eb48 TH |
1026 | |
1027 | if (!capable(CAP_NET_ADMIN)) | |
1028 | return -EPERM; | |
1029 | ||
1030 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1031 | return -ENOMEM; | |
1032 | ||
1033 | index = get_netdev_queue_index(queue); | |
1034 | ||
1035 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1036 | if (err) { | |
1037 | free_cpumask_var(mask); | |
1038 | return err; | |
1039 | } | |
1040 | ||
537c00de | 1041 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1042 | |
1043 | free_cpumask_var(mask); | |
1d24eb48 | 1044 | |
537c00de | 1045 | return err ? : len; |
1d24eb48 TH |
1046 | } |
1047 | ||
1048 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1049 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
ccf5ff69 | 1050 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1051 | |
1052 | static struct attribute *netdev_queue_default_attrs[] = { | |
ccf5ff69 | 1053 | &queue_trans_timeout.attr, |
1054 | #ifdef CONFIG_XPS | |
1d24eb48 | 1055 | &xps_cpus_attribute.attr, |
ccf5ff69 | 1056 | #endif |
1d24eb48 TH |
1057 | NULL |
1058 | }; | |
1059 | ||
1060 | static void netdev_queue_release(struct kobject *kobj) | |
1061 | { | |
1062 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1063 | |
1d24eb48 TH |
1064 | memset(kobj, 0, sizeof(*kobj)); |
1065 | dev_put(queue->dev); | |
1066 | } | |
1067 | ||
1068 | static struct kobj_type netdev_queue_ktype = { | |
1069 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1070 | .release = netdev_queue_release, | |
1071 | .default_attrs = netdev_queue_default_attrs, | |
1072 | }; | |
1073 | ||
1074 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1075 | { | |
1076 | struct netdev_queue *queue = net->_tx + index; | |
1077 | struct kobject *kobj = &queue->kobj; | |
1078 | int error = 0; | |
1079 | ||
1080 | kobj->kset = net->queues_kset; | |
1081 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1082 | "tx-%u", index); | |
114cf580 TH |
1083 | if (error) |
1084 | goto exit; | |
1085 | ||
1086 | #ifdef CONFIG_BQL | |
1087 | error = sysfs_create_group(kobj, &dql_group); | |
1088 | if (error) | |
1089 | goto exit; | |
1090 | #endif | |
1d24eb48 TH |
1091 | |
1092 | kobject_uevent(kobj, KOBJ_ADD); | |
1093 | dev_hold(queue->dev); | |
1094 | ||
114cf580 TH |
1095 | return 0; |
1096 | exit: | |
1097 | kobject_put(kobj); | |
1d24eb48 TH |
1098 | return error; |
1099 | } | |
ccf5ff69 | 1100 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1101 | |
1102 | int | |
1103 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1104 | { | |
ccf5ff69 | 1105 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1106 | int i; |
1107 | int error = 0; | |
1108 | ||
1109 | for (i = old_num; i < new_num; i++) { | |
1110 | error = netdev_queue_add_kobject(net, i); | |
1111 | if (error) { | |
1112 | new_num = old_num; | |
1113 | break; | |
1114 | } | |
1115 | } | |
1116 | ||
114cf580 TH |
1117 | while (--i >= new_num) { |
1118 | struct netdev_queue *queue = net->_tx + i; | |
1119 | ||
1120 | #ifdef CONFIG_BQL | |
1121 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1122 | #endif | |
1123 | kobject_put(&queue->kobj); | |
1124 | } | |
1d24eb48 TH |
1125 | |
1126 | return error; | |
bf264145 TH |
1127 | #else |
1128 | return 0; | |
ccf5ff69 | 1129 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1130 | } |
1131 | ||
1132 | static int register_queue_kobjects(struct net_device *net) | |
1133 | { | |
bf264145 | 1134 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1135 | |
ccf5ff69 | 1136 | #ifdef CONFIG_SYSFS |
62fe0b40 BH |
1137 | net->queues_kset = kset_create_and_add("queues", |
1138 | NULL, &net->dev.kobj); | |
1139 | if (!net->queues_kset) | |
1140 | return -ENOMEM; | |
bf264145 TH |
1141 | #endif |
1142 | ||
1143 | #ifdef CONFIG_RPS | |
1144 | real_rx = net->real_num_rx_queues; | |
1145 | #endif | |
1146 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1147 | |
bf264145 | 1148 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1149 | if (error) |
1150 | goto error; | |
bf264145 | 1151 | rxq = real_rx; |
1d24eb48 | 1152 | |
bf264145 | 1153 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1154 | if (error) |
1155 | goto error; | |
bf264145 | 1156 | txq = real_tx; |
1d24eb48 TH |
1157 | |
1158 | return 0; | |
1159 | ||
1160 | error: | |
1161 | netdev_queue_update_kobjects(net, txq, 0); | |
1162 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1163 | return error; | |
62fe0b40 | 1164 | } |
0a9627f2 | 1165 | |
1d24eb48 | 1166 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1167 | { |
bf264145 TH |
1168 | int real_rx = 0, real_tx = 0; |
1169 | ||
1170 | #ifdef CONFIG_RPS | |
1171 | real_rx = net->real_num_rx_queues; | |
1172 | #endif | |
1173 | real_tx = net->real_num_tx_queues; | |
1174 | ||
1175 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1176 | netdev_queue_update_kobjects(net, real_tx, 0); | |
ccf5ff69 | 1177 | #ifdef CONFIG_SYSFS |
0a9627f2 | 1178 | kset_unregister(net->queues_kset); |
bf264145 | 1179 | #endif |
0a9627f2 | 1180 | } |
608b4b95 | 1181 | |
a685e089 | 1182 | static void *net_grab_current_ns(void) |
608b4b95 | 1183 | { |
a685e089 AV |
1184 | struct net *ns = current->nsproxy->net_ns; |
1185 | #ifdef CONFIG_NET_NS | |
1186 | if (ns) | |
1187 | atomic_inc(&ns->passive); | |
1188 | #endif | |
1189 | return ns; | |
608b4b95 EB |
1190 | } |
1191 | ||
1192 | static const void *net_initial_ns(void) | |
1193 | { | |
1194 | return &init_net; | |
1195 | } | |
1196 | ||
1197 | static const void *net_netlink_ns(struct sock *sk) | |
1198 | { | |
1199 | return sock_net(sk); | |
1200 | } | |
1201 | ||
04600794 | 1202 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1203 | .type = KOBJ_NS_TYPE_NET, |
a685e089 | 1204 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1205 | .netlink_ns = net_netlink_ns, |
1206 | .initial_ns = net_initial_ns, | |
a685e089 | 1207 | .drop_ns = net_drop_ns, |
608b4b95 | 1208 | }; |
04600794 | 1209 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1210 | |
7eff2e7a | 1211 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1212 | { |
43cb76d9 | 1213 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1214 | int retval; |
1da177e4 | 1215 | |
312c004d | 1216 | /* pass interface to uevent. */ |
7eff2e7a | 1217 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1218 | if (retval) |
1219 | goto exit; | |
ca2f37db JT |
1220 | |
1221 | /* pass ifindex to uevent. | |
1222 | * ifindex is useful as it won't change (interface name may change) | |
1223 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1224 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1225 | |
bf62456e | 1226 | exit: |
bf62456e | 1227 | return retval; |
1da177e4 | 1228 | } |
1da177e4 LT |
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 */ |
43cb76d9 | 1257 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1258 | .ns_type = &net_ns_type_operations, |
1259 | .namespace = net_namespace, | |
1da177e4 LT |
1260 | }; |
1261 | ||
9093bbb2 SH |
1262 | /* Delete sysfs entries but hold kobject reference until after all |
1263 | * netdev references are gone. | |
1264 | */ | |
8b41d188 | 1265 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1266 | { |
9093bbb2 SH |
1267 | struct device *dev = &(net->dev); |
1268 | ||
1269 | kobject_get(&dev->kobj); | |
3891845e | 1270 | |
1d24eb48 | 1271 | remove_queue_kobjects(net); |
0a9627f2 | 1272 | |
9802c8e2 ML |
1273 | pm_runtime_set_memalloc_noio(dev, false); |
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; |
38c1a01c JB |
1298 | |
1299 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
1300 | if (net->ieee80211_ptr) | |
1301 | *groups++ = &wireless_group; | |
1302 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
1303 | else if (net->wireless_handlers) | |
1304 | *groups++ = &wireless_group; | |
1305 | #endif | |
1306 | #endif | |
8b41d188 | 1307 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1308 | |
0a9627f2 TH |
1309 | error = device_add(dev); |
1310 | if (error) | |
1311 | return error; | |
1312 | ||
1d24eb48 | 1313 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1314 | if (error) { |
1315 | device_del(dev); | |
1316 | return error; | |
1317 | } | |
1318 | ||
9802c8e2 ML |
1319 | pm_runtime_set_memalloc_noio(dev, true); |
1320 | ||
0a9627f2 | 1321 | return error; |
1da177e4 LT |
1322 | } |
1323 | ||
b8a9787e JV |
1324 | int netdev_class_create_file(struct class_attribute *class_attr) |
1325 | { | |
1326 | return class_create_file(&net_class, class_attr); | |
1327 | } | |
9e34a5b5 | 1328 | EXPORT_SYMBOL(netdev_class_create_file); |
b8a9787e JV |
1329 | |
1330 | void netdev_class_remove_file(struct class_attribute *class_attr) | |
1331 | { | |
1332 | class_remove_file(&net_class, class_attr); | |
1333 | } | |
b8a9787e JV |
1334 | EXPORT_SYMBOL(netdev_class_remove_file); |
1335 | ||
8b41d188 | 1336 | int netdev_kobject_init(void) |
1da177e4 | 1337 | { |
608b4b95 | 1338 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1339 | return class_register(&net_class); |
1340 | } |