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 | 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 | } \ | |
6be8aeef | 63 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 64 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 65 | { \ |
43cb76d9 | 66 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
67 | } \ |
68 | ||
69 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
70 | NETDEVICE_SHOW(field, format_string); \ | |
71 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 72 | |
6be8aeef GKH |
73 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
74 | NETDEVICE_SHOW(field, format_string); \ | |
75 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
76 | |
77 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 78 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
79 | const char *buf, size_t len, |
80 | int (*set)(struct net_device *, unsigned long)) | |
81 | { | |
5e1fccc0 EB |
82 | struct net_device *netdev = to_net_dev(dev); |
83 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
84 | unsigned long new; |
85 | int ret = -EINVAL; | |
86 | ||
5e1fccc0 | 87 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
88 | return -EPERM; |
89 | ||
e1e420c7 SK |
90 | ret = kstrtoul(buf, 0, &new); |
91 | if (ret) | |
1da177e4 LT |
92 | goto err; |
93 | ||
5a5990d3 | 94 | if (!rtnl_trylock()) |
336ca57c | 95 | return restart_syscall(); |
5a5990d3 | 96 | |
5e1fccc0 EB |
97 | if (dev_isalive(netdev)) { |
98 | if ((ret = (*set)(netdev, new)) == 0) | |
1da177e4 LT |
99 | ret = len; |
100 | } | |
101 | rtnl_unlock(); | |
102 | err: | |
103 | return ret; | |
104 | } | |
105 | ||
6be8aeef GKH |
106 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
107 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); | |
108 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
109 | NETDEVICE_SHOW_RO(iflink, fmt_dec); | |
110 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); | |
111 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
112 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 LT |
113 | |
114 | /* use same locking rules as GIFHWADDR ioctl's */ | |
6be8aeef | 115 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 116 | char *buf) |
1da177e4 LT |
117 | { |
118 | struct net_device *net = to_net_dev(dev); | |
119 | ssize_t ret = -EINVAL; | |
120 | ||
121 | read_lock(&dev_base_lock); | |
122 | if (dev_isalive(net)) | |
7ffc49a6 | 123 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
124 | read_unlock(&dev_base_lock); |
125 | return ret; | |
126 | } | |
6be8aeef | 127 | static DEVICE_ATTR_RO(address); |
1da177e4 | 128 | |
6be8aeef GKH |
129 | static ssize_t broadcast_show(struct device *dev, |
130 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
131 | { |
132 | struct net_device *net = to_net_dev(dev); | |
133 | if (dev_isalive(net)) | |
7ffc49a6 | 134 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
135 | return -EINVAL; |
136 | } | |
6be8aeef | 137 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 138 | |
fdae0fde JP |
139 | static int change_carrier(struct net_device *net, unsigned long new_carrier) |
140 | { | |
141 | if (!netif_running(net)) | |
142 | return -EINVAL; | |
143 | return dev_change_carrier(net, (bool) new_carrier); | |
144 | } | |
145 | ||
6be8aeef GKH |
146 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
147 | const char *buf, size_t len) | |
fdae0fde JP |
148 | { |
149 | return netdev_store(dev, attr, buf, len, change_carrier); | |
150 | } | |
151 | ||
6be8aeef | 152 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 153 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
154 | { |
155 | struct net_device *netdev = to_net_dev(dev); | |
156 | if (netif_running(netdev)) { | |
157 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
158 | } | |
159 | return -EINVAL; | |
160 | } | |
6be8aeef | 161 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 162 | |
6be8aeef | 163 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
164 | struct device_attribute *attr, char *buf) |
165 | { | |
166 | struct net_device *netdev = to_net_dev(dev); | |
167 | int ret = -EINVAL; | |
168 | ||
169 | if (!rtnl_trylock()) | |
170 | return restart_syscall(); | |
171 | ||
8ae6daca DD |
172 | if (netif_running(netdev)) { |
173 | struct ethtool_cmd cmd; | |
4bc71cb9 | 174 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca | 175 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); |
d519e17e AG |
176 | } |
177 | rtnl_unlock(); | |
178 | return ret; | |
179 | } | |
6be8aeef | 180 | static DEVICE_ATTR_RO(speed); |
d519e17e | 181 | |
6be8aeef | 182 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
183 | struct device_attribute *attr, char *buf) |
184 | { | |
185 | struct net_device *netdev = to_net_dev(dev); | |
186 | int ret = -EINVAL; | |
187 | ||
188 | if (!rtnl_trylock()) | |
189 | return restart_syscall(); | |
190 | ||
8ae6daca DD |
191 | if (netif_running(netdev)) { |
192 | struct ethtool_cmd cmd; | |
c6c13965 NA |
193 | if (!__ethtool_get_settings(netdev, &cmd)) { |
194 | const char *duplex; | |
195 | switch (cmd.duplex) { | |
196 | case DUPLEX_HALF: | |
197 | duplex = "half"; | |
198 | break; | |
199 | case DUPLEX_FULL: | |
200 | duplex = "full"; | |
201 | break; | |
202 | default: | |
203 | duplex = "unknown"; | |
204 | break; | |
205 | } | |
206 | ret = sprintf(buf, "%s\n", duplex); | |
207 | } | |
d519e17e AG |
208 | } |
209 | rtnl_unlock(); | |
210 | return ret; | |
211 | } | |
6be8aeef | 212 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 213 | |
6be8aeef | 214 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 215 | struct device_attribute *attr, char *buf) |
b00055aa SR |
216 | { |
217 | struct net_device *netdev = to_net_dev(dev); | |
218 | ||
219 | if (netif_running(netdev)) | |
220 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
221 | ||
222 | return -EINVAL; | |
223 | } | |
6be8aeef | 224 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 225 | |
36cbd3dc | 226 | static const char *const operstates[] = { |
b00055aa SR |
227 | "unknown", |
228 | "notpresent", /* currently unused */ | |
229 | "down", | |
230 | "lowerlayerdown", | |
231 | "testing", /* currently unused */ | |
232 | "dormant", | |
233 | "up" | |
234 | }; | |
235 | ||
6be8aeef | 236 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 237 | struct device_attribute *attr, char *buf) |
b00055aa SR |
238 | { |
239 | const struct net_device *netdev = to_net_dev(dev); | |
240 | unsigned char operstate; | |
241 | ||
242 | read_lock(&dev_base_lock); | |
243 | operstate = netdev->operstate; | |
244 | if (!netif_running(netdev)) | |
245 | operstate = IF_OPER_DOWN; | |
246 | read_unlock(&dev_base_lock); | |
247 | ||
e3a5cd9e | 248 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
249 | return -EINVAL; /* should not happen */ |
250 | ||
251 | return sprintf(buf, "%s\n", operstates[operstate]); | |
252 | } | |
6be8aeef | 253 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 254 | |
1da177e4 | 255 | /* read-write attributes */ |
1da177e4 LT |
256 | |
257 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
258 | { | |
259 | return dev_set_mtu(net, (int) new_mtu); | |
260 | } | |
261 | ||
6be8aeef | 262 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 263 | const char *buf, size_t len) |
1da177e4 | 264 | { |
43cb76d9 | 265 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 266 | } |
6be8aeef | 267 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 LT |
268 | |
269 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
270 | { | |
95c96174 | 271 | return dev_change_flags(net, (unsigned int) new_flags); |
1da177e4 LT |
272 | } |
273 | ||
6be8aeef | 274 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 275 | const char *buf, size_t len) |
1da177e4 | 276 | { |
43cb76d9 | 277 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 278 | } |
6be8aeef | 279 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 LT |
280 | |
281 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
282 | { | |
283 | net->tx_queue_len = new_len; | |
284 | return 0; | |
285 | } | |
286 | ||
6be8aeef | 287 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
288 | struct device_attribute *attr, |
289 | const char *buf, size_t len) | |
1da177e4 | 290 | { |
5e1fccc0 EB |
291 | if (!capable(CAP_NET_ADMIN)) |
292 | return -EPERM; | |
293 | ||
43cb76d9 | 294 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 | 295 | } |
6be8aeef | 296 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong); |
1da177e4 | 297 | |
6be8aeef | 298 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
299 | const char *buf, size_t len) |
300 | { | |
301 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 302 | struct net *net = dev_net(netdev); |
0b815a1a SH |
303 | size_t count = len; |
304 | ssize_t ret; | |
305 | ||
5e1fccc0 | 306 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
307 | return -EPERM; |
308 | ||
309 | /* ignore trailing newline */ | |
310 | if (len > 0 && buf[len - 1] == '\n') | |
311 | --count; | |
312 | ||
336ca57c EB |
313 | if (!rtnl_trylock()) |
314 | return restart_syscall(); | |
0b815a1a SH |
315 | ret = dev_set_alias(netdev, buf, count); |
316 | rtnl_unlock(); | |
317 | ||
318 | return ret < 0 ? ret : len; | |
319 | } | |
320 | ||
6be8aeef | 321 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
322 | struct device_attribute *attr, char *buf) |
323 | { | |
324 | const struct net_device *netdev = to_net_dev(dev); | |
325 | ssize_t ret = 0; | |
326 | ||
336ca57c EB |
327 | if (!rtnl_trylock()) |
328 | return restart_syscall(); | |
0b815a1a SH |
329 | if (netdev->ifalias) |
330 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
331 | rtnl_unlock(); | |
332 | return ret; | |
333 | } | |
6be8aeef | 334 | static DEVICE_ATTR_RW(ifalias); |
a512b92b VD |
335 | |
336 | static int change_group(struct net_device *net, unsigned long new_group) | |
337 | { | |
338 | dev_set_group(net, (int) new_group); | |
339 | return 0; | |
340 | } | |
341 | ||
6be8aeef GKH |
342 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
343 | const char *buf, size_t len) | |
a512b92b VD |
344 | { |
345 | return netdev_store(dev, attr, buf, len, change_group); | |
346 | } | |
6be8aeef GKH |
347 | NETDEVICE_SHOW(group, fmt_dec); |
348 | static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); | |
349 | ||
cc998ff8 | 350 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
351 | struct device_attribute *attr, char *buf) |
352 | { | |
353 | struct net_device *netdev = to_net_dev(dev); | |
354 | ssize_t ret = -EINVAL; | |
355 | ||
356 | if (!rtnl_trylock()) | |
357 | return restart_syscall(); | |
358 | ||
359 | if (dev_isalive(netdev)) { | |
360 | struct netdev_phys_port_id ppid; | |
361 | ||
362 | ret = dev_get_phys_port_id(netdev, &ppid); | |
363 | if (!ret) | |
364 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
365 | } | |
366 | rtnl_unlock(); | |
367 | ||
368 | return ret; | |
369 | } | |
cc998ff8 LT |
370 | static DEVICE_ATTR_RO(phys_port_id); |
371 | ||
6be8aeef GKH |
372 | static struct attribute *net_class_attrs[] = { |
373 | &dev_attr_netdev_group.attr, | |
374 | &dev_attr_type.attr, | |
375 | &dev_attr_dev_id.attr, | |
376 | &dev_attr_iflink.attr, | |
377 | &dev_attr_ifindex.attr, | |
378 | &dev_attr_addr_assign_type.attr, | |
379 | &dev_attr_addr_len.attr, | |
380 | &dev_attr_link_mode.attr, | |
381 | &dev_attr_address.attr, | |
382 | &dev_attr_broadcast.attr, | |
383 | &dev_attr_speed.attr, | |
384 | &dev_attr_duplex.attr, | |
385 | &dev_attr_dormant.attr, | |
386 | &dev_attr_operstate.attr, | |
387 | &dev_attr_ifalias.attr, | |
388 | &dev_attr_carrier.attr, | |
389 | &dev_attr_mtu.attr, | |
390 | &dev_attr_flags.attr, | |
391 | &dev_attr_tx_queue_len.attr, | |
cc998ff8 | 392 | &dev_attr_phys_port_id.attr, |
6be8aeef | 393 | NULL, |
1da177e4 | 394 | }; |
6be8aeef | 395 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
396 | |
397 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
398 | static ssize_t netstat_show(const struct device *d, |
399 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
400 | unsigned long offset) |
401 | { | |
43cb76d9 | 402 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
403 | ssize_t ret = -EINVAL; |
404 | ||
be1f3c2c BH |
405 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
406 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
407 | |
408 | read_lock(&dev_base_lock); | |
96e74088 | 409 | if (dev_isalive(dev)) { |
28172739 ED |
410 | struct rtnl_link_stats64 temp; |
411 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
412 | ||
be1f3c2c | 413 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 414 | } |
1da177e4 LT |
415 | read_unlock(&dev_base_lock); |
416 | return ret; | |
417 | } | |
418 | ||
419 | /* generate a read-only statistics attribute */ | |
420 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 421 | static ssize_t name##_show(struct device *d, \ |
43cb76d9 | 422 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 423 | { \ |
43cb76d9 | 424 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 425 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 426 | } \ |
6be8aeef | 427 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
428 | |
429 | NETSTAT_ENTRY(rx_packets); | |
430 | NETSTAT_ENTRY(tx_packets); | |
431 | NETSTAT_ENTRY(rx_bytes); | |
432 | NETSTAT_ENTRY(tx_bytes); | |
433 | NETSTAT_ENTRY(rx_errors); | |
434 | NETSTAT_ENTRY(tx_errors); | |
435 | NETSTAT_ENTRY(rx_dropped); | |
436 | NETSTAT_ENTRY(tx_dropped); | |
437 | NETSTAT_ENTRY(multicast); | |
438 | NETSTAT_ENTRY(collisions); | |
439 | NETSTAT_ENTRY(rx_length_errors); | |
440 | NETSTAT_ENTRY(rx_over_errors); | |
441 | NETSTAT_ENTRY(rx_crc_errors); | |
442 | NETSTAT_ENTRY(rx_frame_errors); | |
443 | NETSTAT_ENTRY(rx_fifo_errors); | |
444 | NETSTAT_ENTRY(rx_missed_errors); | |
445 | NETSTAT_ENTRY(tx_aborted_errors); | |
446 | NETSTAT_ENTRY(tx_carrier_errors); | |
447 | NETSTAT_ENTRY(tx_fifo_errors); | |
448 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
449 | NETSTAT_ENTRY(tx_window_errors); | |
450 | NETSTAT_ENTRY(rx_compressed); | |
451 | NETSTAT_ENTRY(tx_compressed); | |
452 | ||
453 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
454 | &dev_attr_rx_packets.attr, |
455 | &dev_attr_tx_packets.attr, | |
456 | &dev_attr_rx_bytes.attr, | |
457 | &dev_attr_tx_bytes.attr, | |
458 | &dev_attr_rx_errors.attr, | |
459 | &dev_attr_tx_errors.attr, | |
460 | &dev_attr_rx_dropped.attr, | |
461 | &dev_attr_tx_dropped.attr, | |
462 | &dev_attr_multicast.attr, | |
463 | &dev_attr_collisions.attr, | |
464 | &dev_attr_rx_length_errors.attr, | |
465 | &dev_attr_rx_over_errors.attr, | |
466 | &dev_attr_rx_crc_errors.attr, | |
467 | &dev_attr_rx_frame_errors.attr, | |
468 | &dev_attr_rx_fifo_errors.attr, | |
469 | &dev_attr_rx_missed_errors.attr, | |
470 | &dev_attr_tx_aborted_errors.attr, | |
471 | &dev_attr_tx_carrier_errors.attr, | |
472 | &dev_attr_tx_fifo_errors.attr, | |
473 | &dev_attr_tx_heartbeat_errors.attr, | |
474 | &dev_attr_tx_window_errors.attr, | |
475 | &dev_attr_rx_compressed.attr, | |
476 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
477 | NULL |
478 | }; | |
479 | ||
480 | ||
481 | static struct attribute_group netstat_group = { | |
482 | .name = "statistics", | |
483 | .attrs = netstat_attrs, | |
484 | }; | |
38c1a01c JB |
485 | |
486 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
487 | static struct attribute *wireless_attrs[] = { | |
488 | NULL | |
489 | }; | |
490 | ||
491 | static struct attribute_group wireless_group = { | |
492 | .name = "wireless", | |
493 | .attrs = wireless_attrs, | |
494 | }; | |
495 | #endif | |
6be8aeef GKH |
496 | |
497 | #else /* CONFIG_SYSFS */ | |
498 | #define net_class_groups NULL | |
d6523ddf | 499 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 500 | |
a953be53 | 501 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
502 | #define to_rx_queue_attr(_attr) container_of(_attr, \ |
503 | struct rx_queue_attribute, attr) | |
504 | ||
505 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
506 | ||
507 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
508 | char *buf) | |
509 | { | |
510 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
511 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
512 | ||
513 | if (!attribute->show) | |
514 | return -EIO; | |
515 | ||
516 | return attribute->show(queue, attribute, buf); | |
517 | } | |
518 | ||
519 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
520 | const char *buf, size_t count) | |
521 | { | |
522 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
523 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
524 | ||
525 | if (!attribute->store) | |
526 | return -EIO; | |
527 | ||
528 | return attribute->store(queue, attribute, buf, count); | |
529 | } | |
530 | ||
fa50d645 | 531 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
532 | .show = rx_queue_attr_show, |
533 | .store = rx_queue_attr_store, | |
534 | }; | |
535 | ||
a953be53 | 536 | #ifdef CONFIG_RPS |
0a9627f2 TH |
537 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, |
538 | struct rx_queue_attribute *attribute, char *buf) | |
539 | { | |
540 | struct rps_map *map; | |
541 | cpumask_var_t mask; | |
542 | size_t len = 0; | |
543 | int i; | |
544 | ||
545 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
546 | return -ENOMEM; | |
547 | ||
548 | rcu_read_lock(); | |
549 | map = rcu_dereference(queue->rps_map); | |
550 | if (map) | |
551 | for (i = 0; i < map->len; i++) | |
552 | cpumask_set_cpu(map->cpus[i], mask); | |
553 | ||
554 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
555 | if (PAGE_SIZE - len < 3) { | |
556 | rcu_read_unlock(); | |
557 | free_cpumask_var(mask); | |
558 | return -EINVAL; | |
559 | } | |
560 | rcu_read_unlock(); | |
561 | ||
562 | free_cpumask_var(mask); | |
563 | len += sprintf(buf + len, "\n"); | |
564 | return len; | |
565 | } | |
566 | ||
f5acb907 | 567 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
568 | struct rx_queue_attribute *attribute, |
569 | const char *buf, size_t len) | |
570 | { | |
571 | struct rps_map *old_map, *map; | |
572 | cpumask_var_t mask; | |
573 | int err, cpu, i; | |
574 | static DEFINE_SPINLOCK(rps_map_lock); | |
575 | ||
576 | if (!capable(CAP_NET_ADMIN)) | |
577 | return -EPERM; | |
578 | ||
579 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
580 | return -ENOMEM; | |
581 | ||
582 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
583 | if (err) { | |
584 | free_cpumask_var(mask); | |
585 | return err; | |
586 | } | |
587 | ||
95c96174 | 588 | map = kzalloc(max_t(unsigned int, |
0a9627f2 TH |
589 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
590 | GFP_KERNEL); | |
591 | if (!map) { | |
592 | free_cpumask_var(mask); | |
593 | return -ENOMEM; | |
594 | } | |
595 | ||
596 | i = 0; | |
597 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
598 | map->cpus[i++] = cpu; | |
599 | ||
600 | if (i) | |
601 | map->len = i; | |
602 | else { | |
603 | kfree(map); | |
604 | map = NULL; | |
605 | } | |
606 | ||
607 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
608 | old_map = rcu_dereference_protected(queue->rps_map, |
609 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
610 | rcu_assign_pointer(queue->rps_map, map); |
611 | spin_unlock(&rps_map_lock); | |
612 | ||
adc9300e | 613 | if (map) |
c5905afb | 614 | static_key_slow_inc(&rps_needed); |
adc9300e | 615 | if (old_map) { |
f6f80238 | 616 | kfree_rcu(old_map, rcu); |
c5905afb | 617 | static_key_slow_dec(&rps_needed); |
adc9300e | 618 | } |
0a9627f2 TH |
619 | free_cpumask_var(mask); |
620 | return len; | |
621 | } | |
622 | ||
fec5e652 TH |
623 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
624 | struct rx_queue_attribute *attr, | |
625 | char *buf) | |
626 | { | |
627 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 628 | unsigned long val = 0; |
fec5e652 TH |
629 | |
630 | rcu_read_lock(); | |
631 | flow_table = rcu_dereference(queue->rps_flow_table); | |
632 | if (flow_table) | |
60b778ce | 633 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
634 | rcu_read_unlock(); |
635 | ||
60b778ce | 636 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
637 | } |
638 | ||
fec5e652 TH |
639 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
640 | { | |
641 | struct rps_dev_flow_table *table = container_of(rcu, | |
642 | struct rps_dev_flow_table, rcu); | |
243198d0 | 643 | vfree(table); |
fec5e652 TH |
644 | } |
645 | ||
f5acb907 | 646 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
647 | struct rx_queue_attribute *attr, |
648 | const char *buf, size_t len) | |
649 | { | |
60b778ce | 650 | unsigned long mask, count; |
fec5e652 TH |
651 | struct rps_dev_flow_table *table, *old_table; |
652 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 653 | int rc; |
fec5e652 TH |
654 | |
655 | if (!capable(CAP_NET_ADMIN)) | |
656 | return -EPERM; | |
657 | ||
60b778ce ED |
658 | rc = kstrtoul(buf, 0, &count); |
659 | if (rc < 0) | |
660 | return rc; | |
fec5e652 TH |
661 | |
662 | if (count) { | |
60b778ce ED |
663 | mask = count - 1; |
664 | /* mask = roundup_pow_of_two(count) - 1; | |
665 | * without overflows... | |
666 | */ | |
667 | while ((mask | (mask >> 1)) != mask) | |
668 | mask |= (mask >> 1); | |
669 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 670 | * and on 32bit arches, must check |
671 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
672 | */ |
673 | #if BITS_PER_LONG > 32 | |
674 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 675 | return -EINVAL; |
60b778ce ED |
676 | #else |
677 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 678 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
679 | /* Enforce a limit to prevent overflow */ |
680 | return -EINVAL; | |
681 | } | |
60b778ce ED |
682 | #endif |
683 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
684 | if (!table) |
685 | return -ENOMEM; | |
686 | ||
60b778ce ED |
687 | table->mask = mask; |
688 | for (count = 0; count <= mask; count++) | |
689 | table->flows[count].cpu = RPS_NO_CPU; | |
fec5e652 TH |
690 | } else |
691 | table = NULL; | |
692 | ||
693 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
694 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
695 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
696 | rcu_assign_pointer(queue->rps_flow_table, table); |
697 | spin_unlock(&rps_dev_flow_lock); | |
698 | ||
699 | if (old_table) | |
700 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
701 | ||
702 | return len; | |
703 | } | |
704 | ||
0a9627f2 TH |
705 | static struct rx_queue_attribute rps_cpus_attribute = |
706 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
707 | ||
fec5e652 TH |
708 | |
709 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
710 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
711 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
a953be53 | 712 | #endif /* CONFIG_RPS */ |
fec5e652 | 713 | |
0a9627f2 | 714 | static struct attribute *rx_queue_default_attrs[] = { |
a953be53 | 715 | #ifdef CONFIG_RPS |
0a9627f2 | 716 | &rps_cpus_attribute.attr, |
fec5e652 | 717 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 718 | #endif |
0a9627f2 TH |
719 | NULL |
720 | }; | |
721 | ||
722 | static void rx_queue_release(struct kobject *kobj) | |
723 | { | |
724 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 725 | #ifdef CONFIG_RPS |
6e3f7faf ED |
726 | struct rps_map *map; |
727 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 728 | |
fec5e652 | 729 | |
33d480ce | 730 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
731 | if (map) { |
732 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 733 | kfree_rcu(map, rcu); |
9ea19481 | 734 | } |
6e3f7faf | 735 | |
33d480ce | 736 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
737 | if (flow_table) { |
738 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 739 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 740 | } |
a953be53 | 741 | #endif |
0a9627f2 | 742 | |
9ea19481 | 743 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 744 | dev_put(queue->dev); |
0a9627f2 TH |
745 | } |
746 | ||
82ef3d5d WC |
747 | static const void *rx_queue_namespace(struct kobject *kobj) |
748 | { | |
749 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
750 | struct device *dev = &queue->dev->dev; | |
751 | const void *ns = NULL; | |
752 | ||
753 | if (dev->class && dev->class->ns_type) | |
754 | ns = dev->class->namespace(dev); | |
755 | ||
756 | return ns; | |
757 | } | |
758 | ||
0a9627f2 TH |
759 | static struct kobj_type rx_queue_ktype = { |
760 | .sysfs_ops = &rx_queue_sysfs_ops, | |
761 | .release = rx_queue_release, | |
762 | .default_attrs = rx_queue_default_attrs, | |
82ef3d5d | 763 | .namespace = rx_queue_namespace |
0a9627f2 TH |
764 | }; |
765 | ||
766 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
767 | { | |
768 | struct netdev_rx_queue *queue = net->_rx + index; | |
769 | struct kobject *kobj = &queue->kobj; | |
770 | int error = 0; | |
771 | ||
772 | kobj->kset = net->queues_kset; | |
773 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
774 | "rx-%u", index); | |
a953be53 MD |
775 | if (error) |
776 | goto exit; | |
777 | ||
778 | if (net->sysfs_rx_queue_group) { | |
779 | error = sysfs_create_group(kobj, net->sysfs_rx_queue_group); | |
780 | if (error) | |
781 | goto exit; | |
0a9627f2 TH |
782 | } |
783 | ||
784 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 785 | dev_hold(queue->dev); |
0a9627f2 | 786 | |
a953be53 MD |
787 | return error; |
788 | exit: | |
789 | kobject_put(kobj); | |
0a9627f2 TH |
790 | return error; |
791 | } | |
a953be53 | 792 | #endif /* CONFIG_SYFS */ |
0a9627f2 | 793 | |
62fe0b40 BH |
794 | int |
795 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 796 | { |
a953be53 | 797 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
798 | int i; |
799 | int error = 0; | |
800 | ||
a953be53 MD |
801 | #ifndef CONFIG_RPS |
802 | if (!net->sysfs_rx_queue_group) | |
803 | return 0; | |
804 | #endif | |
62fe0b40 | 805 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 806 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
807 | if (error) { |
808 | new_num = old_num; | |
0a9627f2 | 809 | break; |
62fe0b40 | 810 | } |
0a9627f2 TH |
811 | } |
812 | ||
a953be53 MD |
813 | while (--i >= new_num) { |
814 | if (net->sysfs_rx_queue_group) | |
815 | sysfs_remove_group(&net->_rx[i].kobj, | |
816 | net->sysfs_rx_queue_group); | |
62fe0b40 | 817 | kobject_put(&net->_rx[i].kobj); |
a953be53 | 818 | } |
0a9627f2 TH |
819 | |
820 | return error; | |
bf264145 TH |
821 | #else |
822 | return 0; | |
823 | #endif | |
0a9627f2 TH |
824 | } |
825 | ||
ccf5ff69 | 826 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
827 | /* |
828 | * netdev_queue sysfs structures and functions. | |
829 | */ | |
830 | struct netdev_queue_attribute { | |
831 | struct attribute attr; | |
832 | ssize_t (*show)(struct netdev_queue *queue, | |
833 | struct netdev_queue_attribute *attr, char *buf); | |
834 | ssize_t (*store)(struct netdev_queue *queue, | |
835 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
836 | }; | |
837 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
838 | struct netdev_queue_attribute, attr) | |
839 | ||
840 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
841 | ||
842 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
843 | struct attribute *attr, char *buf) | |
844 | { | |
845 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
846 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
847 | ||
848 | if (!attribute->show) | |
849 | return -EIO; | |
850 | ||
851 | return attribute->show(queue, attribute, buf); | |
852 | } | |
853 | ||
854 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
855 | struct attribute *attr, | |
856 | const char *buf, size_t count) | |
857 | { | |
858 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
859 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
860 | ||
861 | if (!attribute->store) | |
862 | return -EIO; | |
863 | ||
864 | return attribute->store(queue, attribute, buf, count); | |
865 | } | |
866 | ||
867 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
868 | .show = netdev_queue_attr_show, | |
869 | .store = netdev_queue_attr_store, | |
870 | }; | |
871 | ||
ccf5ff69 | 872 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
873 | struct netdev_queue_attribute *attribute, | |
874 | char *buf) | |
875 | { | |
876 | unsigned long trans_timeout; | |
877 | ||
878 | spin_lock_irq(&queue->_xmit_lock); | |
879 | trans_timeout = queue->trans_timeout; | |
880 | spin_unlock_irq(&queue->_xmit_lock); | |
881 | ||
882 | return sprintf(buf, "%lu", trans_timeout); | |
883 | } | |
884 | ||
885 | static struct netdev_queue_attribute queue_trans_timeout = | |
886 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); | |
887 | ||
114cf580 TH |
888 | #ifdef CONFIG_BQL |
889 | /* | |
890 | * Byte queue limits sysfs structures and functions. | |
891 | */ | |
892 | static ssize_t bql_show(char *buf, unsigned int value) | |
893 | { | |
894 | return sprintf(buf, "%u\n", value); | |
895 | } | |
896 | ||
897 | static ssize_t bql_set(const char *buf, const size_t count, | |
898 | unsigned int *pvalue) | |
899 | { | |
900 | unsigned int value; | |
901 | int err; | |
902 | ||
903 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) | |
904 | value = DQL_MAX_LIMIT; | |
905 | else { | |
906 | err = kstrtouint(buf, 10, &value); | |
907 | if (err < 0) | |
908 | return err; | |
909 | if (value > DQL_MAX_LIMIT) | |
910 | return -EINVAL; | |
911 | } | |
912 | ||
913 | *pvalue = value; | |
914 | ||
915 | return count; | |
916 | } | |
917 | ||
918 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
919 | struct netdev_queue_attribute *attr, | |
920 | char *buf) | |
921 | { | |
922 | struct dql *dql = &queue->dql; | |
923 | ||
924 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
925 | } | |
926 | ||
927 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
928 | struct netdev_queue_attribute *attribute, | |
929 | const char *buf, size_t len) | |
930 | { | |
931 | struct dql *dql = &queue->dql; | |
95c96174 | 932 | unsigned int value; |
114cf580 TH |
933 | int err; |
934 | ||
935 | err = kstrtouint(buf, 10, &value); | |
936 | if (err < 0) | |
937 | return err; | |
938 | ||
939 | dql->slack_hold_time = msecs_to_jiffies(value); | |
940 | ||
941 | return len; | |
942 | } | |
943 | ||
944 | static struct netdev_queue_attribute bql_hold_time_attribute = | |
945 | __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, | |
946 | bql_set_hold_time); | |
947 | ||
948 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
949 | struct netdev_queue_attribute *attr, | |
950 | char *buf) | |
951 | { | |
952 | struct dql *dql = &queue->dql; | |
953 | ||
954 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
955 | } | |
956 | ||
957 | static struct netdev_queue_attribute bql_inflight_attribute = | |
795d9a25 | 958 | __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); |
114cf580 TH |
959 | |
960 | #define BQL_ATTR(NAME, FIELD) \ | |
961 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
962 | struct netdev_queue_attribute *attr, \ | |
963 | char *buf) \ | |
964 | { \ | |
965 | return bql_show(buf, queue->dql.FIELD); \ | |
966 | } \ | |
967 | \ | |
968 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
969 | struct netdev_queue_attribute *attr, \ | |
970 | const char *buf, size_t len) \ | |
971 | { \ | |
972 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
973 | } \ | |
974 | \ | |
975 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ | |
976 | __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ | |
977 | bql_set_ ## NAME); | |
978 | ||
979 | BQL_ATTR(limit, limit) | |
980 | BQL_ATTR(limit_max, max_limit) | |
981 | BQL_ATTR(limit_min, min_limit) | |
982 | ||
983 | static struct attribute *dql_attrs[] = { | |
984 | &bql_limit_attribute.attr, | |
985 | &bql_limit_max_attribute.attr, | |
986 | &bql_limit_min_attribute.attr, | |
987 | &bql_hold_time_attribute.attr, | |
988 | &bql_inflight_attribute.attr, | |
989 | NULL | |
990 | }; | |
991 | ||
992 | static struct attribute_group dql_group = { | |
993 | .name = "byte_queue_limits", | |
994 | .attrs = dql_attrs, | |
995 | }; | |
996 | #endif /* CONFIG_BQL */ | |
997 | ||
ccf5ff69 | 998 | #ifdef CONFIG_XPS |
1d24eb48 | 999 | static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
0a9627f2 | 1000 | { |
1d24eb48 TH |
1001 | struct net_device *dev = queue->dev; |
1002 | int i; | |
1003 | ||
1004 | for (i = 0; i < dev->num_tx_queues; i++) | |
1005 | if (queue == &dev->_tx[i]) | |
1006 | break; | |
1007 | ||
1008 | BUG_ON(i >= dev->num_tx_queues); | |
1009 | ||
1010 | return i; | |
1011 | } | |
1012 | ||
1013 | ||
1014 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
1015 | struct netdev_queue_attribute *attribute, char *buf) | |
1016 | { | |
1017 | struct net_device *dev = queue->dev; | |
1018 | struct xps_dev_maps *dev_maps; | |
1019 | cpumask_var_t mask; | |
1020 | unsigned long index; | |
1021 | size_t len = 0; | |
1022 | int i; | |
1023 | ||
1024 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
1025 | return -ENOMEM; | |
1026 | ||
1027 | index = get_netdev_queue_index(queue); | |
1028 | ||
1029 | rcu_read_lock(); | |
1030 | dev_maps = rcu_dereference(dev->xps_maps); | |
1031 | if (dev_maps) { | |
1032 | for_each_possible_cpu(i) { | |
1033 | struct xps_map *map = | |
1034 | rcu_dereference(dev_maps->cpu_map[i]); | |
1035 | if (map) { | |
1036 | int j; | |
1037 | for (j = 0; j < map->len; j++) { | |
1038 | if (map->queues[j] == index) { | |
1039 | cpumask_set_cpu(i, mask); | |
1040 | break; | |
1041 | } | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | } | |
1046 | rcu_read_unlock(); | |
1047 | ||
1048 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
1049 | if (PAGE_SIZE - len < 3) { | |
1050 | free_cpumask_var(mask); | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | ||
1054 | free_cpumask_var(mask); | |
1055 | len += sprintf(buf + len, "\n"); | |
1056 | return len; | |
1057 | } | |
1058 | ||
1d24eb48 TH |
1059 | static ssize_t store_xps_map(struct netdev_queue *queue, |
1060 | struct netdev_queue_attribute *attribute, | |
1061 | const char *buf, size_t len) | |
1062 | { | |
1063 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1064 | unsigned long index; |
537c00de AD |
1065 | cpumask_var_t mask; |
1066 | int err; | |
1d24eb48 TH |
1067 | |
1068 | if (!capable(CAP_NET_ADMIN)) | |
1069 | return -EPERM; | |
1070 | ||
1071 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1072 | return -ENOMEM; | |
1073 | ||
1074 | index = get_netdev_queue_index(queue); | |
1075 | ||
1076 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1077 | if (err) { | |
1078 | free_cpumask_var(mask); | |
1079 | return err; | |
1080 | } | |
1081 | ||
537c00de | 1082 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1083 | |
1084 | free_cpumask_var(mask); | |
1d24eb48 | 1085 | |
537c00de | 1086 | return err ? : len; |
1d24eb48 TH |
1087 | } |
1088 | ||
1089 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1090 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
ccf5ff69 | 1091 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1092 | |
1093 | static struct attribute *netdev_queue_default_attrs[] = { | |
ccf5ff69 | 1094 | &queue_trans_timeout.attr, |
1095 | #ifdef CONFIG_XPS | |
1d24eb48 | 1096 | &xps_cpus_attribute.attr, |
ccf5ff69 | 1097 | #endif |
1d24eb48 TH |
1098 | NULL |
1099 | }; | |
1100 | ||
1101 | static void netdev_queue_release(struct kobject *kobj) | |
1102 | { | |
1103 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1104 | |
1d24eb48 TH |
1105 | memset(kobj, 0, sizeof(*kobj)); |
1106 | dev_put(queue->dev); | |
1107 | } | |
1108 | ||
82ef3d5d WC |
1109 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1110 | { | |
1111 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1112 | struct device *dev = &queue->dev->dev; | |
1113 | const void *ns = NULL; | |
1114 | ||
1115 | if (dev->class && dev->class->ns_type) | |
1116 | ns = dev->class->namespace(dev); | |
1117 | ||
1118 | return ns; | |
1119 | } | |
1120 | ||
1d24eb48 TH |
1121 | static struct kobj_type netdev_queue_ktype = { |
1122 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1123 | .release = netdev_queue_release, | |
1124 | .default_attrs = netdev_queue_default_attrs, | |
82ef3d5d | 1125 | .namespace = netdev_queue_namespace, |
1d24eb48 TH |
1126 | }; |
1127 | ||
1128 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1129 | { | |
1130 | struct netdev_queue *queue = net->_tx + index; | |
1131 | struct kobject *kobj = &queue->kobj; | |
1132 | int error = 0; | |
1133 | ||
1134 | kobj->kset = net->queues_kset; | |
1135 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1136 | "tx-%u", index); | |
114cf580 TH |
1137 | if (error) |
1138 | goto exit; | |
1139 | ||
1140 | #ifdef CONFIG_BQL | |
1141 | error = sysfs_create_group(kobj, &dql_group); | |
1142 | if (error) | |
1143 | goto exit; | |
1144 | #endif | |
1d24eb48 TH |
1145 | |
1146 | kobject_uevent(kobj, KOBJ_ADD); | |
1147 | dev_hold(queue->dev); | |
1148 | ||
114cf580 TH |
1149 | return 0; |
1150 | exit: | |
1151 | kobject_put(kobj); | |
1d24eb48 TH |
1152 | return error; |
1153 | } | |
ccf5ff69 | 1154 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1155 | |
1156 | int | |
1157 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1158 | { | |
ccf5ff69 | 1159 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1160 | int i; |
1161 | int error = 0; | |
1162 | ||
1163 | for (i = old_num; i < new_num; i++) { | |
1164 | error = netdev_queue_add_kobject(net, i); | |
1165 | if (error) { | |
1166 | new_num = old_num; | |
1167 | break; | |
1168 | } | |
1169 | } | |
1170 | ||
114cf580 TH |
1171 | while (--i >= new_num) { |
1172 | struct netdev_queue *queue = net->_tx + i; | |
1173 | ||
1174 | #ifdef CONFIG_BQL | |
1175 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1176 | #endif | |
1177 | kobject_put(&queue->kobj); | |
1178 | } | |
1d24eb48 TH |
1179 | |
1180 | return error; | |
bf264145 TH |
1181 | #else |
1182 | return 0; | |
ccf5ff69 | 1183 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1184 | } |
1185 | ||
1186 | static int register_queue_kobjects(struct net_device *net) | |
1187 | { | |
bf264145 | 1188 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1189 | |
ccf5ff69 | 1190 | #ifdef CONFIG_SYSFS |
62fe0b40 BH |
1191 | net->queues_kset = kset_create_and_add("queues", |
1192 | NULL, &net->dev.kobj); | |
1193 | if (!net->queues_kset) | |
1194 | return -ENOMEM; | |
bf264145 TH |
1195 | real_rx = net->real_num_rx_queues; |
1196 | #endif | |
1197 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1198 | |
bf264145 | 1199 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1200 | if (error) |
1201 | goto error; | |
bf264145 | 1202 | rxq = real_rx; |
1d24eb48 | 1203 | |
bf264145 | 1204 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1205 | if (error) |
1206 | goto error; | |
bf264145 | 1207 | txq = real_tx; |
1d24eb48 TH |
1208 | |
1209 | return 0; | |
1210 | ||
1211 | error: | |
1212 | netdev_queue_update_kobjects(net, txq, 0); | |
1213 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1214 | return error; | |
62fe0b40 | 1215 | } |
0a9627f2 | 1216 | |
1d24eb48 | 1217 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1218 | { |
bf264145 TH |
1219 | int real_rx = 0, real_tx = 0; |
1220 | ||
a953be53 | 1221 | #ifdef CONFIG_SYSFS |
bf264145 TH |
1222 | real_rx = net->real_num_rx_queues; |
1223 | #endif | |
1224 | real_tx = net->real_num_tx_queues; | |
1225 | ||
1226 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1227 | netdev_queue_update_kobjects(net, real_tx, 0); | |
ccf5ff69 | 1228 | #ifdef CONFIG_SYSFS |
0a9627f2 | 1229 | kset_unregister(net->queues_kset); |
bf264145 | 1230 | #endif |
0a9627f2 | 1231 | } |
608b4b95 | 1232 | |
7dc5dbc8 EB |
1233 | static bool net_current_may_mount(void) |
1234 | { | |
1235 | struct net *net = current->nsproxy->net_ns; | |
1236 | ||
1237 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1238 | } | |
1239 | ||
a685e089 | 1240 | static void *net_grab_current_ns(void) |
608b4b95 | 1241 | { |
a685e089 AV |
1242 | struct net *ns = current->nsproxy->net_ns; |
1243 | #ifdef CONFIG_NET_NS | |
1244 | if (ns) | |
1245 | atomic_inc(&ns->passive); | |
1246 | #endif | |
1247 | return ns; | |
608b4b95 EB |
1248 | } |
1249 | ||
1250 | static const void *net_initial_ns(void) | |
1251 | { | |
1252 | return &init_net; | |
1253 | } | |
1254 | ||
1255 | static const void *net_netlink_ns(struct sock *sk) | |
1256 | { | |
1257 | return sock_net(sk); | |
1258 | } | |
1259 | ||
04600794 | 1260 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1261 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1262 | .current_may_mount = net_current_may_mount, |
a685e089 | 1263 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1264 | .netlink_ns = net_netlink_ns, |
1265 | .initial_ns = net_initial_ns, | |
a685e089 | 1266 | .drop_ns = net_drop_ns, |
608b4b95 | 1267 | }; |
04600794 | 1268 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1269 | |
7eff2e7a | 1270 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1271 | { |
43cb76d9 | 1272 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1273 | int retval; |
1da177e4 | 1274 | |
312c004d | 1275 | /* pass interface to uevent. */ |
7eff2e7a | 1276 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1277 | if (retval) |
1278 | goto exit; | |
ca2f37db JT |
1279 | |
1280 | /* pass ifindex to uevent. | |
1281 | * ifindex is useful as it won't change (interface name may change) | |
1282 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1283 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1284 | |
bf62456e | 1285 | exit: |
bf62456e | 1286 | return retval; |
1da177e4 | 1287 | } |
1da177e4 LT |
1288 | |
1289 | /* | |
4ec93edb | 1290 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1291 | * Called when last reference to device kobject is gone. |
1da177e4 | 1292 | */ |
43cb76d9 | 1293 | static void netdev_release(struct device *d) |
1da177e4 | 1294 | { |
43cb76d9 | 1295 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1296 | |
1297 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1298 | ||
0b815a1a | 1299 | kfree(dev->ifalias); |
74d332c1 | 1300 | netdev_freemem(dev); |
1da177e4 LT |
1301 | } |
1302 | ||
608b4b95 EB |
1303 | static const void *net_namespace(struct device *d) |
1304 | { | |
1305 | struct net_device *dev; | |
1306 | dev = container_of(d, struct net_device, dev); | |
1307 | return dev_net(dev); | |
1308 | } | |
1309 | ||
1da177e4 LT |
1310 | static struct class net_class = { |
1311 | .name = "net", | |
43cb76d9 | 1312 | .dev_release = netdev_release, |
6be8aeef | 1313 | .dev_groups = net_class_groups, |
43cb76d9 | 1314 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1315 | .ns_type = &net_ns_type_operations, |
1316 | .namespace = net_namespace, | |
1da177e4 LT |
1317 | }; |
1318 | ||
9093bbb2 SH |
1319 | /* Delete sysfs entries but hold kobject reference until after all |
1320 | * netdev references are gone. | |
1321 | */ | |
8b41d188 | 1322 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1323 | { |
9093bbb2 SH |
1324 | struct device *dev = &(net->dev); |
1325 | ||
1326 | kobject_get(&dev->kobj); | |
3891845e | 1327 | |
1d24eb48 | 1328 | remove_queue_kobjects(net); |
0a9627f2 | 1329 | |
9802c8e2 ML |
1330 | pm_runtime_set_memalloc_noio(dev, false); |
1331 | ||
9093bbb2 | 1332 | device_del(dev); |
1da177e4 LT |
1333 | } |
1334 | ||
1335 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1336 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1337 | { |
43cb76d9 | 1338 | struct device *dev = &(net->dev); |
a4dbd674 | 1339 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1340 | int error = 0; |
1da177e4 | 1341 | |
a1b3f594 | 1342 | device_initialize(dev); |
43cb76d9 GKH |
1343 | dev->class = &net_class; |
1344 | dev->platform_data = net; | |
1345 | dev->groups = groups; | |
1da177e4 | 1346 | |
a2205472 | 1347 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1348 | |
8b41d188 | 1349 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1350 | /* Allow for a device specific group */ |
1351 | if (*groups) | |
1352 | groups++; | |
1da177e4 | 1353 | |
0c509a6c | 1354 | *groups++ = &netstat_group; |
38c1a01c JB |
1355 | |
1356 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
1357 | if (net->ieee80211_ptr) | |
1358 | *groups++ = &wireless_group; | |
1359 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
1360 | else if (net->wireless_handlers) | |
1361 | *groups++ = &wireless_group; | |
1362 | #endif | |
1363 | #endif | |
8b41d188 | 1364 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1365 | |
0a9627f2 TH |
1366 | error = device_add(dev); |
1367 | if (error) | |
1368 | return error; | |
1369 | ||
1d24eb48 | 1370 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1371 | if (error) { |
1372 | device_del(dev); | |
1373 | return error; | |
1374 | } | |
1375 | ||
9802c8e2 ML |
1376 | pm_runtime_set_memalloc_noio(dev, true); |
1377 | ||
0a9627f2 | 1378 | return error; |
1da177e4 LT |
1379 | } |
1380 | ||
58292cbe TH |
1381 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
1382 | const void *ns) | |
b8a9787e | 1383 | { |
58292cbe | 1384 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1385 | } |
58292cbe | 1386 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1387 | |
58292cbe TH |
1388 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, |
1389 | const void *ns) | |
b8a9787e | 1390 | { |
58292cbe | 1391 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1392 | } |
58292cbe | 1393 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1394 | |
a48d4bb0 | 1395 | int __init netdev_kobject_init(void) |
1da177e4 | 1396 | { |
608b4b95 | 1397 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1398 | return class_register(&net_class); |
1399 | } |