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> | |
aecbe01e | 15 | #include <net/switchdev.h> |
1da177e4 | 16 | #include <linux/if_arp.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
174cd4b1 | 18 | #include <linux/sched/signal.h> |
608b4b95 | 19 | #include <linux/nsproxy.h> |
1da177e4 | 20 | #include <net/sock.h> |
608b4b95 | 21 | #include <net/net_namespace.h> |
1da177e4 | 22 | #include <linux/rtnetlink.h> |
fec5e652 | 23 | #include <linux/vmalloc.h> |
bc3b2d7f | 24 | #include <linux/export.h> |
114cf580 | 25 | #include <linux/jiffies.h> |
9802c8e2 | 26 | #include <linux/pm_runtime.h> |
aa836df9 | 27 | #include <linux/of.h> |
88832a22 | 28 | #include <linux/of_net.h> |
1da177e4 | 29 | |
342709ef PE |
30 | #include "net-sysfs.h" |
31 | ||
8b41d188 | 32 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
33 | static const char fmt_hex[] = "%#x\n"; |
34 | static const char fmt_dec[] = "%d\n"; | |
35 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 36 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 37 | |
4ec93edb | 38 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 39 | { |
fe9925b5 | 40 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
41 | } |
42 | ||
43 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
44 | static ssize_t netdev_show(const struct device *dev, |
45 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
46 | ssize_t (*format)(const struct net_device *, char *)) |
47 | { | |
6b53dafe | 48 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
49 | ssize_t ret = -EINVAL; |
50 | ||
51 | read_lock(&dev_base_lock); | |
6b53dafe WC |
52 | if (dev_isalive(ndev)) |
53 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
54 | read_unlock(&dev_base_lock); |
55 | ||
56 | return ret; | |
57 | } | |
58 | ||
59 | /* generate a show function for simple field */ | |
60 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 61 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 62 | { \ |
6b53dafe | 63 | return sprintf(buf, format_string, dev->field); \ |
1da177e4 | 64 | } \ |
6be8aeef | 65 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 66 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 67 | { \ |
43cb76d9 | 68 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
69 | } \ |
70 | ||
71 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
72 | NETDEVICE_SHOW(field, format_string); \ | |
73 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 74 | |
6be8aeef GKH |
75 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
76 | NETDEVICE_SHOW(field, format_string); \ | |
77 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
78 | |
79 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 80 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
81 | const char *buf, size_t len, |
82 | int (*set)(struct net_device *, unsigned long)) | |
83 | { | |
5e1fccc0 EB |
84 | struct net_device *netdev = to_net_dev(dev); |
85 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
86 | unsigned long new; |
87 | int ret = -EINVAL; | |
88 | ||
5e1fccc0 | 89 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
90 | return -EPERM; |
91 | ||
e1e420c7 SK |
92 | ret = kstrtoul(buf, 0, &new); |
93 | if (ret) | |
1da177e4 LT |
94 | goto err; |
95 | ||
5a5990d3 | 96 | if (!rtnl_trylock()) |
336ca57c | 97 | return restart_syscall(); |
5a5990d3 | 98 | |
5e1fccc0 EB |
99 | if (dev_isalive(netdev)) { |
100 | if ((ret = (*set)(netdev, new)) == 0) | |
1da177e4 LT |
101 | ret = len; |
102 | } | |
103 | rtnl_unlock(); | |
104 | err: | |
105 | return ret; | |
106 | } | |
107 | ||
6be8aeef | 108 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 109 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
110 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
111 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
6be8aeef GKH |
112 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); |
113 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
114 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 | 115 | |
a54acb3a ND |
116 | static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, |
117 | char *buf) | |
118 | { | |
119 | struct net_device *ndev = to_net_dev(dev); | |
120 | ||
121 | return sprintf(buf, fmt_dec, dev_get_iflink(ndev)); | |
122 | } | |
123 | static DEVICE_ATTR_RO(iflink); | |
124 | ||
6b53dafe | 125 | static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) |
685343fc | 126 | { |
6b53dafe | 127 | return sprintf(buf, fmt_dec, dev->name_assign_type); |
685343fc TG |
128 | } |
129 | ||
130 | static ssize_t name_assign_type_show(struct device *dev, | |
131 | struct device_attribute *attr, | |
132 | char *buf) | |
133 | { | |
6b53dafe | 134 | struct net_device *ndev = to_net_dev(dev); |
685343fc TG |
135 | ssize_t ret = -EINVAL; |
136 | ||
6b53dafe | 137 | if (ndev->name_assign_type != NET_NAME_UNKNOWN) |
685343fc TG |
138 | ret = netdev_show(dev, attr, buf, format_name_assign_type); |
139 | ||
140 | return ret; | |
141 | } | |
142 | static DEVICE_ATTR_RO(name_assign_type); | |
143 | ||
1da177e4 | 144 | /* use same locking rules as GIFHWADDR ioctl's */ |
6be8aeef | 145 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 146 | char *buf) |
1da177e4 | 147 | { |
6b53dafe | 148 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
149 | ssize_t ret = -EINVAL; |
150 | ||
151 | read_lock(&dev_base_lock); | |
6b53dafe WC |
152 | if (dev_isalive(ndev)) |
153 | ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); | |
1da177e4 LT |
154 | read_unlock(&dev_base_lock); |
155 | return ret; | |
156 | } | |
6be8aeef | 157 | static DEVICE_ATTR_RO(address); |
1da177e4 | 158 | |
6be8aeef GKH |
159 | static ssize_t broadcast_show(struct device *dev, |
160 | struct device_attribute *attr, char *buf) | |
1da177e4 | 161 | { |
6b53dafe WC |
162 | struct net_device *ndev = to_net_dev(dev); |
163 | if (dev_isalive(ndev)) | |
164 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
165 | return -EINVAL; |
166 | } | |
6be8aeef | 167 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 168 | |
6b53dafe | 169 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 170 | { |
6b53dafe | 171 | if (!netif_running(dev)) |
fdae0fde | 172 | return -EINVAL; |
6b53dafe | 173 | return dev_change_carrier(dev, (bool) new_carrier); |
fdae0fde JP |
174 | } |
175 | ||
6be8aeef GKH |
176 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
177 | const char *buf, size_t len) | |
fdae0fde JP |
178 | { |
179 | return netdev_store(dev, attr, buf, len, change_carrier); | |
180 | } | |
181 | ||
6be8aeef | 182 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 183 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
184 | { |
185 | struct net_device *netdev = to_net_dev(dev); | |
186 | if (netif_running(netdev)) { | |
187 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
188 | } | |
189 | return -EINVAL; | |
190 | } | |
6be8aeef | 191 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 192 | |
6be8aeef | 193 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
194 | struct device_attribute *attr, char *buf) |
195 | { | |
196 | struct net_device *netdev = to_net_dev(dev); | |
197 | int ret = -EINVAL; | |
198 | ||
199 | if (!rtnl_trylock()) | |
200 | return restart_syscall(); | |
201 | ||
8ae6daca | 202 | if (netif_running(netdev)) { |
7cad1bac DD |
203 | struct ethtool_link_ksettings cmd; |
204 | ||
205 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) | |
206 | ret = sprintf(buf, fmt_dec, cmd.base.speed); | |
d519e17e AG |
207 | } |
208 | rtnl_unlock(); | |
209 | return ret; | |
210 | } | |
6be8aeef | 211 | static DEVICE_ATTR_RO(speed); |
d519e17e | 212 | |
6be8aeef | 213 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
214 | struct device_attribute *attr, char *buf) |
215 | { | |
216 | struct net_device *netdev = to_net_dev(dev); | |
217 | int ret = -EINVAL; | |
218 | ||
219 | if (!rtnl_trylock()) | |
220 | return restart_syscall(); | |
221 | ||
8ae6daca | 222 | if (netif_running(netdev)) { |
7cad1bac DD |
223 | struct ethtool_link_ksettings cmd; |
224 | ||
225 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) { | |
c6c13965 | 226 | const char *duplex; |
7cad1bac DD |
227 | |
228 | switch (cmd.base.duplex) { | |
c6c13965 NA |
229 | case DUPLEX_HALF: |
230 | duplex = "half"; | |
231 | break; | |
232 | case DUPLEX_FULL: | |
233 | duplex = "full"; | |
234 | break; | |
235 | default: | |
236 | duplex = "unknown"; | |
237 | break; | |
238 | } | |
239 | ret = sprintf(buf, "%s\n", duplex); | |
240 | } | |
d519e17e AG |
241 | } |
242 | rtnl_unlock(); | |
243 | return ret; | |
244 | } | |
6be8aeef | 245 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 246 | |
6be8aeef | 247 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 248 | struct device_attribute *attr, char *buf) |
b00055aa SR |
249 | { |
250 | struct net_device *netdev = to_net_dev(dev); | |
251 | ||
252 | if (netif_running(netdev)) | |
253 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
254 | ||
255 | return -EINVAL; | |
256 | } | |
6be8aeef | 257 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 258 | |
36cbd3dc | 259 | static const char *const operstates[] = { |
b00055aa SR |
260 | "unknown", |
261 | "notpresent", /* currently unused */ | |
262 | "down", | |
263 | "lowerlayerdown", | |
264 | "testing", /* currently unused */ | |
265 | "dormant", | |
266 | "up" | |
267 | }; | |
268 | ||
6be8aeef | 269 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 270 | struct device_attribute *attr, char *buf) |
b00055aa SR |
271 | { |
272 | const struct net_device *netdev = to_net_dev(dev); | |
273 | unsigned char operstate; | |
274 | ||
275 | read_lock(&dev_base_lock); | |
276 | operstate = netdev->operstate; | |
277 | if (!netif_running(netdev)) | |
278 | operstate = IF_OPER_DOWN; | |
279 | read_unlock(&dev_base_lock); | |
280 | ||
e3a5cd9e | 281 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
282 | return -EINVAL; /* should not happen */ |
283 | ||
284 | return sprintf(buf, "%s\n", operstates[operstate]); | |
285 | } | |
6be8aeef | 286 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 287 | |
2d3b479d | 288 | static ssize_t carrier_changes_show(struct device *dev, |
289 | struct device_attribute *attr, | |
290 | char *buf) | |
291 | { | |
292 | struct net_device *netdev = to_net_dev(dev); | |
293 | return sprintf(buf, fmt_dec, | |
294 | atomic_read(&netdev->carrier_changes)); | |
295 | } | |
296 | static DEVICE_ATTR_RO(carrier_changes); | |
297 | ||
1da177e4 | 298 | /* read-write attributes */ |
1da177e4 | 299 | |
6b53dafe | 300 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 301 | { |
6b53dafe | 302 | return dev_set_mtu(dev, (int) new_mtu); |
1da177e4 LT |
303 | } |
304 | ||
6be8aeef | 305 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 306 | const char *buf, size_t len) |
1da177e4 | 307 | { |
43cb76d9 | 308 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 309 | } |
6be8aeef | 310 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 311 | |
6b53dafe | 312 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 313 | { |
6b53dafe | 314 | return dev_change_flags(dev, (unsigned int) new_flags); |
1da177e4 LT |
315 | } |
316 | ||
6be8aeef | 317 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 318 | const char *buf, size_t len) |
1da177e4 | 319 | { |
43cb76d9 | 320 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 321 | } |
6be8aeef | 322 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 323 | |
6b53dafe | 324 | static int change_tx_queue_len(struct net_device *dev, unsigned long new_len) |
1da177e4 | 325 | { |
0cd29503 AD |
326 | unsigned int orig_len = dev->tx_queue_len; |
327 | int res; | |
328 | ||
329 | if (new_len != (unsigned int)new_len) | |
330 | return -ERANGE; | |
08294a26 JW |
331 | |
332 | if (new_len != orig_len) { | |
333 | dev->tx_queue_len = new_len; | |
334 | res = call_netdevice_notifiers(NETDEV_CHANGE_TX_QUEUE_LEN, dev); | |
335 | res = notifier_to_errno(res); | |
336 | if (res) { | |
337 | netdev_err(dev, | |
338 | "refused to change device tx_queue_len\n"); | |
339 | dev->tx_queue_len = orig_len; | |
340 | return -EFAULT; | |
341 | } | |
342 | } | |
343 | ||
1da177e4 LT |
344 | return 0; |
345 | } | |
346 | ||
6be8aeef | 347 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
348 | struct device_attribute *attr, |
349 | const char *buf, size_t len) | |
1da177e4 | 350 | { |
5e1fccc0 EB |
351 | if (!capable(CAP_NET_ADMIN)) |
352 | return -EPERM; | |
353 | ||
43cb76d9 | 354 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 | 355 | } |
0cd29503 | 356 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec); |
1da177e4 | 357 | |
3b47d303 ED |
358 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
359 | { | |
360 | dev->gro_flush_timeout = val; | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
365 | struct device_attribute *attr, | |
366 | const char *buf, size_t len) | |
367 | { | |
368 | if (!capable(CAP_NET_ADMIN)) | |
369 | return -EPERM; | |
370 | ||
371 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
372 | } | |
373 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
374 | ||
6be8aeef | 375 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
376 | const char *buf, size_t len) |
377 | { | |
378 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 379 | struct net *net = dev_net(netdev); |
0b815a1a SH |
380 | size_t count = len; |
381 | ssize_t ret; | |
382 | ||
5e1fccc0 | 383 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
384 | return -EPERM; |
385 | ||
386 | /* ignore trailing newline */ | |
387 | if (len > 0 && buf[len - 1] == '\n') | |
388 | --count; | |
389 | ||
336ca57c EB |
390 | if (!rtnl_trylock()) |
391 | return restart_syscall(); | |
0b815a1a SH |
392 | ret = dev_set_alias(netdev, buf, count); |
393 | rtnl_unlock(); | |
394 | ||
395 | return ret < 0 ? ret : len; | |
396 | } | |
397 | ||
6be8aeef | 398 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
399 | struct device_attribute *attr, char *buf) |
400 | { | |
401 | const struct net_device *netdev = to_net_dev(dev); | |
402 | ssize_t ret = 0; | |
403 | ||
336ca57c EB |
404 | if (!rtnl_trylock()) |
405 | return restart_syscall(); | |
0b815a1a SH |
406 | if (netdev->ifalias) |
407 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
408 | rtnl_unlock(); | |
409 | return ret; | |
410 | } | |
6be8aeef | 411 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 412 | |
6b53dafe | 413 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 414 | { |
6b53dafe | 415 | dev_set_group(dev, (int) new_group); |
a512b92b VD |
416 | return 0; |
417 | } | |
418 | ||
6be8aeef GKH |
419 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
420 | const char *buf, size_t len) | |
a512b92b VD |
421 | { |
422 | return netdev_store(dev, attr, buf, len, change_group); | |
423 | } | |
6be8aeef GKH |
424 | NETDEVICE_SHOW(group, fmt_dec); |
425 | static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); | |
426 | ||
d746d707 AK |
427 | static int change_proto_down(struct net_device *dev, unsigned long proto_down) |
428 | { | |
429 | return dev_change_proto_down(dev, (bool) proto_down); | |
430 | } | |
431 | ||
432 | static ssize_t proto_down_store(struct device *dev, | |
433 | struct device_attribute *attr, | |
434 | const char *buf, size_t len) | |
435 | { | |
436 | return netdev_store(dev, attr, buf, len, change_proto_down); | |
437 | } | |
438 | NETDEVICE_SHOW_RW(proto_down, fmt_dec); | |
439 | ||
cc998ff8 | 440 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
441 | struct device_attribute *attr, char *buf) |
442 | { | |
443 | struct net_device *netdev = to_net_dev(dev); | |
444 | ssize_t ret = -EINVAL; | |
445 | ||
446 | if (!rtnl_trylock()) | |
447 | return restart_syscall(); | |
448 | ||
449 | if (dev_isalive(netdev)) { | |
02637fce | 450 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
451 | |
452 | ret = dev_get_phys_port_id(netdev, &ppid); | |
453 | if (!ret) | |
454 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
455 | } | |
456 | rtnl_unlock(); | |
457 | ||
458 | return ret; | |
459 | } | |
cc998ff8 LT |
460 | static DEVICE_ATTR_RO(phys_port_id); |
461 | ||
db24a904 DA |
462 | static ssize_t phys_port_name_show(struct device *dev, |
463 | struct device_attribute *attr, char *buf) | |
464 | { | |
465 | struct net_device *netdev = to_net_dev(dev); | |
466 | ssize_t ret = -EINVAL; | |
467 | ||
468 | if (!rtnl_trylock()) | |
469 | return restart_syscall(); | |
470 | ||
471 | if (dev_isalive(netdev)) { | |
472 | char name[IFNAMSIZ]; | |
473 | ||
474 | ret = dev_get_phys_port_name(netdev, name, sizeof(name)); | |
475 | if (!ret) | |
476 | ret = sprintf(buf, "%s\n", name); | |
477 | } | |
478 | rtnl_unlock(); | |
479 | ||
480 | return ret; | |
481 | } | |
482 | static DEVICE_ATTR_RO(phys_port_name); | |
483 | ||
aecbe01e JP |
484 | static ssize_t phys_switch_id_show(struct device *dev, |
485 | struct device_attribute *attr, char *buf) | |
486 | { | |
487 | struct net_device *netdev = to_net_dev(dev); | |
488 | ssize_t ret = -EINVAL; | |
489 | ||
490 | if (!rtnl_trylock()) | |
491 | return restart_syscall(); | |
492 | ||
493 | if (dev_isalive(netdev)) { | |
f8e20a9f | 494 | struct switchdev_attr attr = { |
6ff64f6f | 495 | .orig_dev = netdev, |
1f868398 | 496 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
f8e20a9f SF |
497 | .flags = SWITCHDEV_F_NO_RECURSE, |
498 | }; | |
aecbe01e | 499 | |
f8e20a9f | 500 | ret = switchdev_port_attr_get(netdev, &attr); |
aecbe01e | 501 | if (!ret) |
42275bd8 SF |
502 | ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len, |
503 | attr.u.ppid.id); | |
aecbe01e JP |
504 | } |
505 | rtnl_unlock(); | |
506 | ||
507 | return ret; | |
508 | } | |
509 | static DEVICE_ATTR_RO(phys_switch_id); | |
510 | ||
6be8aeef GKH |
511 | static struct attribute *net_class_attrs[] = { |
512 | &dev_attr_netdev_group.attr, | |
513 | &dev_attr_type.attr, | |
514 | &dev_attr_dev_id.attr, | |
3f85944f | 515 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
516 | &dev_attr_iflink.attr, |
517 | &dev_attr_ifindex.attr, | |
685343fc | 518 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
519 | &dev_attr_addr_assign_type.attr, |
520 | &dev_attr_addr_len.attr, | |
521 | &dev_attr_link_mode.attr, | |
522 | &dev_attr_address.attr, | |
523 | &dev_attr_broadcast.attr, | |
524 | &dev_attr_speed.attr, | |
525 | &dev_attr_duplex.attr, | |
526 | &dev_attr_dormant.attr, | |
527 | &dev_attr_operstate.attr, | |
2d3b479d | 528 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
529 | &dev_attr_ifalias.attr, |
530 | &dev_attr_carrier.attr, | |
531 | &dev_attr_mtu.attr, | |
532 | &dev_attr_flags.attr, | |
533 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 534 | &dev_attr_gro_flush_timeout.attr, |
cc998ff8 | 535 | &dev_attr_phys_port_id.attr, |
db24a904 | 536 | &dev_attr_phys_port_name.attr, |
aecbe01e | 537 | &dev_attr_phys_switch_id.attr, |
d746d707 | 538 | &dev_attr_proto_down.attr, |
6be8aeef | 539 | NULL, |
1da177e4 | 540 | }; |
6be8aeef | 541 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
542 | |
543 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
544 | static ssize_t netstat_show(const struct device *d, |
545 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
546 | unsigned long offset) |
547 | { | |
43cb76d9 | 548 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
549 | ssize_t ret = -EINVAL; |
550 | ||
be1f3c2c BH |
551 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
552 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
553 | |
554 | read_lock(&dev_base_lock); | |
96e74088 | 555 | if (dev_isalive(dev)) { |
28172739 ED |
556 | struct rtnl_link_stats64 temp; |
557 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
558 | ||
be1f3c2c | 559 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 560 | } |
1da177e4 LT |
561 | read_unlock(&dev_base_lock); |
562 | return ret; | |
563 | } | |
564 | ||
565 | /* generate a read-only statistics attribute */ | |
566 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 567 | static ssize_t name##_show(struct device *d, \ |
43cb76d9 | 568 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 569 | { \ |
43cb76d9 | 570 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 571 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 572 | } \ |
6be8aeef | 573 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
574 | |
575 | NETSTAT_ENTRY(rx_packets); | |
576 | NETSTAT_ENTRY(tx_packets); | |
577 | NETSTAT_ENTRY(rx_bytes); | |
578 | NETSTAT_ENTRY(tx_bytes); | |
579 | NETSTAT_ENTRY(rx_errors); | |
580 | NETSTAT_ENTRY(tx_errors); | |
581 | NETSTAT_ENTRY(rx_dropped); | |
582 | NETSTAT_ENTRY(tx_dropped); | |
583 | NETSTAT_ENTRY(multicast); | |
584 | NETSTAT_ENTRY(collisions); | |
585 | NETSTAT_ENTRY(rx_length_errors); | |
586 | NETSTAT_ENTRY(rx_over_errors); | |
587 | NETSTAT_ENTRY(rx_crc_errors); | |
588 | NETSTAT_ENTRY(rx_frame_errors); | |
589 | NETSTAT_ENTRY(rx_fifo_errors); | |
590 | NETSTAT_ENTRY(rx_missed_errors); | |
591 | NETSTAT_ENTRY(tx_aborted_errors); | |
592 | NETSTAT_ENTRY(tx_carrier_errors); | |
593 | NETSTAT_ENTRY(tx_fifo_errors); | |
594 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
595 | NETSTAT_ENTRY(tx_window_errors); | |
596 | NETSTAT_ENTRY(rx_compressed); | |
597 | NETSTAT_ENTRY(tx_compressed); | |
6e7333d3 | 598 | NETSTAT_ENTRY(rx_nohandler); |
1da177e4 LT |
599 | |
600 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
601 | &dev_attr_rx_packets.attr, |
602 | &dev_attr_tx_packets.attr, | |
603 | &dev_attr_rx_bytes.attr, | |
604 | &dev_attr_tx_bytes.attr, | |
605 | &dev_attr_rx_errors.attr, | |
606 | &dev_attr_tx_errors.attr, | |
607 | &dev_attr_rx_dropped.attr, | |
608 | &dev_attr_tx_dropped.attr, | |
609 | &dev_attr_multicast.attr, | |
610 | &dev_attr_collisions.attr, | |
611 | &dev_attr_rx_length_errors.attr, | |
612 | &dev_attr_rx_over_errors.attr, | |
613 | &dev_attr_rx_crc_errors.attr, | |
614 | &dev_attr_rx_frame_errors.attr, | |
615 | &dev_attr_rx_fifo_errors.attr, | |
616 | &dev_attr_rx_missed_errors.attr, | |
617 | &dev_attr_tx_aborted_errors.attr, | |
618 | &dev_attr_tx_carrier_errors.attr, | |
619 | &dev_attr_tx_fifo_errors.attr, | |
620 | &dev_attr_tx_heartbeat_errors.attr, | |
621 | &dev_attr_tx_window_errors.attr, | |
622 | &dev_attr_rx_compressed.attr, | |
623 | &dev_attr_tx_compressed.attr, | |
6e7333d3 | 624 | &dev_attr_rx_nohandler.attr, |
1da177e4 LT |
625 | NULL |
626 | }; | |
627 | ||
628 | ||
38ef00cc | 629 | static const struct attribute_group netstat_group = { |
1da177e4 LT |
630 | .name = "statistics", |
631 | .attrs = netstat_attrs, | |
632 | }; | |
38c1a01c JB |
633 | |
634 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
635 | static struct attribute *wireless_attrs[] = { | |
636 | NULL | |
637 | }; | |
638 | ||
38ef00cc | 639 | static const struct attribute_group wireless_group = { |
38c1a01c JB |
640 | .name = "wireless", |
641 | .attrs = wireless_attrs, | |
642 | }; | |
643 | #endif | |
6be8aeef GKH |
644 | |
645 | #else /* CONFIG_SYSFS */ | |
646 | #define net_class_groups NULL | |
d6523ddf | 647 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 648 | |
a953be53 | 649 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
650 | #define to_rx_queue_attr(_attr) container_of(_attr, \ |
651 | struct rx_queue_attribute, attr) | |
652 | ||
653 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
654 | ||
655 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
656 | char *buf) | |
657 | { | |
658 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
659 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
660 | ||
661 | if (!attribute->show) | |
662 | return -EIO; | |
663 | ||
664 | return attribute->show(queue, attribute, buf); | |
665 | } | |
666 | ||
667 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
668 | const char *buf, size_t count) | |
669 | { | |
670 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
671 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
672 | ||
673 | if (!attribute->store) | |
674 | return -EIO; | |
675 | ||
676 | return attribute->store(queue, attribute, buf, count); | |
677 | } | |
678 | ||
fa50d645 | 679 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
680 | .show = rx_queue_attr_show, |
681 | .store = rx_queue_attr_store, | |
682 | }; | |
683 | ||
a953be53 | 684 | #ifdef CONFIG_RPS |
0a9627f2 TH |
685 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, |
686 | struct rx_queue_attribute *attribute, char *buf) | |
687 | { | |
688 | struct rps_map *map; | |
689 | cpumask_var_t mask; | |
f0906827 | 690 | int i, len; |
0a9627f2 TH |
691 | |
692 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
693 | return -ENOMEM; | |
694 | ||
695 | rcu_read_lock(); | |
696 | map = rcu_dereference(queue->rps_map); | |
697 | if (map) | |
698 | for (i = 0; i < map->len; i++) | |
699 | cpumask_set_cpu(map->cpus[i], mask); | |
700 | ||
f0906827 | 701 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 702 | rcu_read_unlock(); |
0a9627f2 | 703 | free_cpumask_var(mask); |
f0906827 TH |
704 | |
705 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
706 | } |
707 | ||
f5acb907 | 708 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
709 | struct rx_queue_attribute *attribute, |
710 | const char *buf, size_t len) | |
711 | { | |
712 | struct rps_map *old_map, *map; | |
713 | cpumask_var_t mask; | |
714 | int err, cpu, i; | |
da65ad1f | 715 | static DEFINE_MUTEX(rps_map_mutex); |
0a9627f2 TH |
716 | |
717 | if (!capable(CAP_NET_ADMIN)) | |
718 | return -EPERM; | |
719 | ||
720 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
721 | return -ENOMEM; | |
722 | ||
723 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
724 | if (err) { | |
725 | free_cpumask_var(mask); | |
726 | return err; | |
727 | } | |
728 | ||
95c96174 | 729 | map = kzalloc(max_t(unsigned int, |
0a9627f2 TH |
730 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
731 | GFP_KERNEL); | |
732 | if (!map) { | |
733 | free_cpumask_var(mask); | |
734 | return -ENOMEM; | |
735 | } | |
736 | ||
737 | i = 0; | |
738 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
739 | map->cpus[i++] = cpu; | |
740 | ||
741 | if (i) | |
742 | map->len = i; | |
743 | else { | |
744 | kfree(map); | |
745 | map = NULL; | |
746 | } | |
747 | ||
da65ad1f | 748 | mutex_lock(&rps_map_mutex); |
6e3f7faf | 749 | old_map = rcu_dereference_protected(queue->rps_map, |
da65ad1f | 750 | mutex_is_locked(&rps_map_mutex)); |
0a9627f2 | 751 | rcu_assign_pointer(queue->rps_map, map); |
0a9627f2 | 752 | |
adc9300e | 753 | if (map) |
c5905afb | 754 | static_key_slow_inc(&rps_needed); |
10e4ea75 | 755 | if (old_map) |
c5905afb | 756 | static_key_slow_dec(&rps_needed); |
10e4ea75 | 757 | |
da65ad1f | 758 | mutex_unlock(&rps_map_mutex); |
10e4ea75 TH |
759 | |
760 | if (old_map) | |
761 | kfree_rcu(old_map, rcu); | |
762 | ||
0a9627f2 TH |
763 | free_cpumask_var(mask); |
764 | return len; | |
765 | } | |
766 | ||
fec5e652 TH |
767 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
768 | struct rx_queue_attribute *attr, | |
769 | char *buf) | |
770 | { | |
771 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 772 | unsigned long val = 0; |
fec5e652 TH |
773 | |
774 | rcu_read_lock(); | |
775 | flow_table = rcu_dereference(queue->rps_flow_table); | |
776 | if (flow_table) | |
60b778ce | 777 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
778 | rcu_read_unlock(); |
779 | ||
60b778ce | 780 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
781 | } |
782 | ||
fec5e652 TH |
783 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
784 | { | |
785 | struct rps_dev_flow_table *table = container_of(rcu, | |
786 | struct rps_dev_flow_table, rcu); | |
243198d0 | 787 | vfree(table); |
fec5e652 TH |
788 | } |
789 | ||
f5acb907 | 790 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
791 | struct rx_queue_attribute *attr, |
792 | const char *buf, size_t len) | |
793 | { | |
60b778ce | 794 | unsigned long mask, count; |
fec5e652 TH |
795 | struct rps_dev_flow_table *table, *old_table; |
796 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 797 | int rc; |
fec5e652 TH |
798 | |
799 | if (!capable(CAP_NET_ADMIN)) | |
800 | return -EPERM; | |
801 | ||
60b778ce ED |
802 | rc = kstrtoul(buf, 0, &count); |
803 | if (rc < 0) | |
804 | return rc; | |
fec5e652 TH |
805 | |
806 | if (count) { | |
60b778ce ED |
807 | mask = count - 1; |
808 | /* mask = roundup_pow_of_two(count) - 1; | |
809 | * without overflows... | |
810 | */ | |
811 | while ((mask | (mask >> 1)) != mask) | |
812 | mask |= (mask >> 1); | |
813 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 814 | * and on 32bit arches, must check |
815 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
816 | */ |
817 | #if BITS_PER_LONG > 32 | |
818 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 819 | return -EINVAL; |
60b778ce ED |
820 | #else |
821 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 822 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
823 | /* Enforce a limit to prevent overflow */ |
824 | return -EINVAL; | |
825 | } | |
60b778ce ED |
826 | #endif |
827 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
828 | if (!table) |
829 | return -ENOMEM; | |
830 | ||
60b778ce ED |
831 | table->mask = mask; |
832 | for (count = 0; count <= mask; count++) | |
833 | table->flows[count].cpu = RPS_NO_CPU; | |
fec5e652 TH |
834 | } else |
835 | table = NULL; | |
836 | ||
837 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
838 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
839 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
840 | rcu_assign_pointer(queue->rps_flow_table, table); |
841 | spin_unlock(&rps_dev_flow_lock); | |
842 | ||
843 | if (old_table) | |
844 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
845 | ||
846 | return len; | |
847 | } | |
848 | ||
0a9627f2 TH |
849 | static struct rx_queue_attribute rps_cpus_attribute = |
850 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
851 | ||
fec5e652 TH |
852 | |
853 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
854 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
855 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
a953be53 | 856 | #endif /* CONFIG_RPS */ |
fec5e652 | 857 | |
0a9627f2 | 858 | static struct attribute *rx_queue_default_attrs[] = { |
a953be53 | 859 | #ifdef CONFIG_RPS |
0a9627f2 | 860 | &rps_cpus_attribute.attr, |
fec5e652 | 861 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 862 | #endif |
0a9627f2 TH |
863 | NULL |
864 | }; | |
865 | ||
866 | static void rx_queue_release(struct kobject *kobj) | |
867 | { | |
868 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 869 | #ifdef CONFIG_RPS |
6e3f7faf ED |
870 | struct rps_map *map; |
871 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 872 | |
fec5e652 | 873 | |
33d480ce | 874 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
875 | if (map) { |
876 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 877 | kfree_rcu(map, rcu); |
9ea19481 | 878 | } |
6e3f7faf | 879 | |
33d480ce | 880 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
881 | if (flow_table) { |
882 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 883 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 884 | } |
a953be53 | 885 | #endif |
0a9627f2 | 886 | |
9ea19481 | 887 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 888 | dev_put(queue->dev); |
0a9627f2 TH |
889 | } |
890 | ||
82ef3d5d WC |
891 | static const void *rx_queue_namespace(struct kobject *kobj) |
892 | { | |
893 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
894 | struct device *dev = &queue->dev->dev; | |
895 | const void *ns = NULL; | |
896 | ||
897 | if (dev->class && dev->class->ns_type) | |
898 | ns = dev->class->namespace(dev); | |
899 | ||
900 | return ns; | |
901 | } | |
902 | ||
0a9627f2 TH |
903 | static struct kobj_type rx_queue_ktype = { |
904 | .sysfs_ops = &rx_queue_sysfs_ops, | |
905 | .release = rx_queue_release, | |
906 | .default_attrs = rx_queue_default_attrs, | |
82ef3d5d | 907 | .namespace = rx_queue_namespace |
0a9627f2 TH |
908 | }; |
909 | ||
6b53dafe | 910 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 911 | { |
6b53dafe | 912 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
913 | struct kobject *kobj = &queue->kobj; |
914 | int error = 0; | |
915 | ||
6b53dafe | 916 | kobj->kset = dev->queues_kset; |
0a9627f2 TH |
917 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
918 | "rx-%u", index); | |
a953be53 | 919 | if (error) |
d0d66837 | 920 | return error; |
a953be53 | 921 | |
6b53dafe WC |
922 | if (dev->sysfs_rx_queue_group) { |
923 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
d0d66837 | 924 | if (error) { |
925 | kobject_put(kobj); | |
926 | return error; | |
927 | } | |
0a9627f2 TH |
928 | } |
929 | ||
930 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 931 | dev_hold(queue->dev); |
0a9627f2 TH |
932 | |
933 | return error; | |
934 | } | |
80dd6eac | 935 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 936 | |
62fe0b40 | 937 | int |
6b53dafe | 938 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 939 | { |
a953be53 | 940 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
941 | int i; |
942 | int error = 0; | |
943 | ||
a953be53 | 944 | #ifndef CONFIG_RPS |
6b53dafe | 945 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
946 | return 0; |
947 | #endif | |
62fe0b40 | 948 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 949 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
950 | if (error) { |
951 | new_num = old_num; | |
0a9627f2 | 952 | break; |
62fe0b40 | 953 | } |
0a9627f2 TH |
954 | } |
955 | ||
a953be53 | 956 | while (--i >= new_num) { |
002d8a1a AV |
957 | struct kobject *kobj = &dev->_rx[i].kobj; |
958 | ||
91864f58 | 959 | if (!atomic_read(&dev_net(dev)->count)) |
002d8a1a | 960 | kobj->uevent_suppress = 1; |
6b53dafe | 961 | if (dev->sysfs_rx_queue_group) |
002d8a1a AV |
962 | sysfs_remove_group(kobj, dev->sysfs_rx_queue_group); |
963 | kobject_put(kobj); | |
a953be53 | 964 | } |
0a9627f2 TH |
965 | |
966 | return error; | |
bf264145 TH |
967 | #else |
968 | return 0; | |
969 | #endif | |
0a9627f2 TH |
970 | } |
971 | ||
ccf5ff69 | 972 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
973 | /* |
974 | * netdev_queue sysfs structures and functions. | |
975 | */ | |
976 | struct netdev_queue_attribute { | |
977 | struct attribute attr; | |
978 | ssize_t (*show)(struct netdev_queue *queue, | |
979 | struct netdev_queue_attribute *attr, char *buf); | |
980 | ssize_t (*store)(struct netdev_queue *queue, | |
981 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
982 | }; | |
983 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
984 | struct netdev_queue_attribute, attr) | |
985 | ||
986 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
987 | ||
988 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
989 | struct attribute *attr, char *buf) | |
990 | { | |
991 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
992 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
993 | ||
994 | if (!attribute->show) | |
995 | return -EIO; | |
996 | ||
997 | return attribute->show(queue, attribute, buf); | |
998 | } | |
999 | ||
1000 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
1001 | struct attribute *attr, | |
1002 | const char *buf, size_t count) | |
1003 | { | |
1004 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
1005 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1006 | ||
1007 | if (!attribute->store) | |
1008 | return -EIO; | |
1009 | ||
1010 | return attribute->store(queue, attribute, buf, count); | |
1011 | } | |
1012 | ||
1013 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
1014 | .show = netdev_queue_attr_show, | |
1015 | .store = netdev_queue_attr_store, | |
1016 | }; | |
1017 | ||
ccf5ff69 | 1018 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
1019 | struct netdev_queue_attribute *attribute, | |
1020 | char *buf) | |
1021 | { | |
1022 | unsigned long trans_timeout; | |
1023 | ||
1024 | spin_lock_irq(&queue->_xmit_lock); | |
1025 | trans_timeout = queue->trans_timeout; | |
1026 | spin_unlock_irq(&queue->_xmit_lock); | |
1027 | ||
1028 | return sprintf(buf, "%lu", trans_timeout); | |
1029 | } | |
1030 | ||
c4047f53 | 1031 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
822b3b2e JF |
1032 | { |
1033 | struct net_device *dev = queue->dev; | |
c4047f53 | 1034 | unsigned int i; |
822b3b2e | 1035 | |
c4047f53 | 1036 | i = queue - dev->_tx; |
822b3b2e JF |
1037 | BUG_ON(i >= dev->num_tx_queues); |
1038 | ||
1039 | return i; | |
1040 | } | |
1041 | ||
8d059b0f AD |
1042 | static ssize_t show_traffic_class(struct netdev_queue *queue, |
1043 | struct netdev_queue_attribute *attribute, | |
1044 | char *buf) | |
1045 | { | |
1046 | struct net_device *dev = queue->dev; | |
1047 | int index = get_netdev_queue_index(queue); | |
1048 | int tc = netdev_txq_to_tc(dev, index); | |
1049 | ||
1050 | if (tc < 0) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | return sprintf(buf, "%u\n", tc); | |
1054 | } | |
1055 | ||
1056 | #ifdef CONFIG_XPS | |
822b3b2e JF |
1057 | static ssize_t show_tx_maxrate(struct netdev_queue *queue, |
1058 | struct netdev_queue_attribute *attribute, | |
1059 | char *buf) | |
1060 | { | |
1061 | return sprintf(buf, "%lu\n", queue->tx_maxrate); | |
1062 | } | |
1063 | ||
1064 | static ssize_t set_tx_maxrate(struct netdev_queue *queue, | |
1065 | struct netdev_queue_attribute *attribute, | |
1066 | const char *buf, size_t len) | |
1067 | { | |
1068 | struct net_device *dev = queue->dev; | |
1069 | int err, index = get_netdev_queue_index(queue); | |
1070 | u32 rate = 0; | |
1071 | ||
1072 | err = kstrtou32(buf, 10, &rate); | |
1073 | if (err < 0) | |
1074 | return err; | |
1075 | ||
1076 | if (!rtnl_trylock()) | |
1077 | return restart_syscall(); | |
1078 | ||
1079 | err = -EOPNOTSUPP; | |
1080 | if (dev->netdev_ops->ndo_set_tx_maxrate) | |
1081 | err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); | |
1082 | ||
1083 | rtnl_unlock(); | |
1084 | if (!err) { | |
1085 | queue->tx_maxrate = rate; | |
1086 | return len; | |
1087 | } | |
1088 | return err; | |
1089 | } | |
1090 | ||
1091 | static struct netdev_queue_attribute queue_tx_maxrate = | |
1092 | __ATTR(tx_maxrate, S_IRUGO | S_IWUSR, | |
1093 | show_tx_maxrate, set_tx_maxrate); | |
1094 | #endif | |
1095 | ||
ccf5ff69 | 1096 | static struct netdev_queue_attribute queue_trans_timeout = |
1097 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); | |
1098 | ||
8d059b0f AD |
1099 | static struct netdev_queue_attribute queue_traffic_class = |
1100 | __ATTR(traffic_class, S_IRUGO, show_traffic_class, NULL); | |
1101 | ||
114cf580 TH |
1102 | #ifdef CONFIG_BQL |
1103 | /* | |
1104 | * Byte queue limits sysfs structures and functions. | |
1105 | */ | |
1106 | static ssize_t bql_show(char *buf, unsigned int value) | |
1107 | { | |
1108 | return sprintf(buf, "%u\n", value); | |
1109 | } | |
1110 | ||
1111 | static ssize_t bql_set(const char *buf, const size_t count, | |
1112 | unsigned int *pvalue) | |
1113 | { | |
1114 | unsigned int value; | |
1115 | int err; | |
1116 | ||
1117 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) | |
1118 | value = DQL_MAX_LIMIT; | |
1119 | else { | |
1120 | err = kstrtouint(buf, 10, &value); | |
1121 | if (err < 0) | |
1122 | return err; | |
1123 | if (value > DQL_MAX_LIMIT) | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | ||
1127 | *pvalue = value; | |
1128 | ||
1129 | return count; | |
1130 | } | |
1131 | ||
1132 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
1133 | struct netdev_queue_attribute *attr, | |
1134 | char *buf) | |
1135 | { | |
1136 | struct dql *dql = &queue->dql; | |
1137 | ||
1138 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
1139 | } | |
1140 | ||
1141 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
1142 | struct netdev_queue_attribute *attribute, | |
1143 | const char *buf, size_t len) | |
1144 | { | |
1145 | struct dql *dql = &queue->dql; | |
95c96174 | 1146 | unsigned int value; |
114cf580 TH |
1147 | int err; |
1148 | ||
1149 | err = kstrtouint(buf, 10, &value); | |
1150 | if (err < 0) | |
1151 | return err; | |
1152 | ||
1153 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1154 | ||
1155 | return len; | |
1156 | } | |
1157 | ||
1158 | static struct netdev_queue_attribute bql_hold_time_attribute = | |
1159 | __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, | |
1160 | bql_set_hold_time); | |
1161 | ||
1162 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
1163 | struct netdev_queue_attribute *attr, | |
1164 | char *buf) | |
1165 | { | |
1166 | struct dql *dql = &queue->dql; | |
1167 | ||
1168 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
1169 | } | |
1170 | ||
1171 | static struct netdev_queue_attribute bql_inflight_attribute = | |
795d9a25 | 1172 | __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); |
114cf580 TH |
1173 | |
1174 | #define BQL_ATTR(NAME, FIELD) \ | |
1175 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
1176 | struct netdev_queue_attribute *attr, \ | |
1177 | char *buf) \ | |
1178 | { \ | |
1179 | return bql_show(buf, queue->dql.FIELD); \ | |
1180 | } \ | |
1181 | \ | |
1182 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
1183 | struct netdev_queue_attribute *attr, \ | |
1184 | const char *buf, size_t len) \ | |
1185 | { \ | |
1186 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1187 | } \ | |
1188 | \ | |
1189 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ | |
1190 | __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ | |
1191 | bql_set_ ## NAME); | |
1192 | ||
1193 | BQL_ATTR(limit, limit) | |
1194 | BQL_ATTR(limit_max, max_limit) | |
1195 | BQL_ATTR(limit_min, min_limit) | |
1196 | ||
1197 | static struct attribute *dql_attrs[] = { | |
1198 | &bql_limit_attribute.attr, | |
1199 | &bql_limit_max_attribute.attr, | |
1200 | &bql_limit_min_attribute.attr, | |
1201 | &bql_hold_time_attribute.attr, | |
1202 | &bql_inflight_attribute.attr, | |
1203 | NULL | |
1204 | }; | |
1205 | ||
38ef00cc | 1206 | static const struct attribute_group dql_group = { |
114cf580 TH |
1207 | .name = "byte_queue_limits", |
1208 | .attrs = dql_attrs, | |
1209 | }; | |
1210 | #endif /* CONFIG_BQL */ | |
1211 | ||
ccf5ff69 | 1212 | #ifdef CONFIG_XPS |
1d24eb48 TH |
1213 | static ssize_t show_xps_map(struct netdev_queue *queue, |
1214 | struct netdev_queue_attribute *attribute, char *buf) | |
1215 | { | |
1216 | struct net_device *dev = queue->dev; | |
184c449f | 1217 | int cpu, len, num_tc = 1, tc = 0; |
1d24eb48 TH |
1218 | struct xps_dev_maps *dev_maps; |
1219 | cpumask_var_t mask; | |
1220 | unsigned long index; | |
1d24eb48 TH |
1221 | |
1222 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
1223 | return -ENOMEM; | |
1224 | ||
1225 | index = get_netdev_queue_index(queue); | |
1226 | ||
184c449f AD |
1227 | if (dev->num_tc) { |
1228 | num_tc = dev->num_tc; | |
1229 | tc = netdev_txq_to_tc(dev, index); | |
1230 | if (tc < 0) | |
1231 | return -EINVAL; | |
1232 | } | |
1233 | ||
1d24eb48 TH |
1234 | rcu_read_lock(); |
1235 | dev_maps = rcu_dereference(dev->xps_maps); | |
1236 | if (dev_maps) { | |
184c449f AD |
1237 | for_each_possible_cpu(cpu) { |
1238 | int i, tci = cpu * num_tc + tc; | |
1239 | struct xps_map *map; | |
1240 | ||
1241 | map = rcu_dereference(dev_maps->cpu_map[tci]); | |
1242 | if (!map) | |
1243 | continue; | |
1244 | ||
1245 | for (i = map->len; i--;) { | |
1246 | if (map->queues[i] == index) { | |
1247 | cpumask_set_cpu(cpu, mask); | |
1248 | break; | |
1d24eb48 TH |
1249 | } |
1250 | } | |
1251 | } | |
1252 | } | |
1253 | rcu_read_unlock(); | |
1254 | ||
f0906827 | 1255 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
1d24eb48 | 1256 | free_cpumask_var(mask); |
f0906827 | 1257 | return len < PAGE_SIZE ? len : -EINVAL; |
1d24eb48 TH |
1258 | } |
1259 | ||
1d24eb48 TH |
1260 | static ssize_t store_xps_map(struct netdev_queue *queue, |
1261 | struct netdev_queue_attribute *attribute, | |
1262 | const char *buf, size_t len) | |
1263 | { | |
1264 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1265 | unsigned long index; |
537c00de AD |
1266 | cpumask_var_t mask; |
1267 | int err; | |
1d24eb48 TH |
1268 | |
1269 | if (!capable(CAP_NET_ADMIN)) | |
1270 | return -EPERM; | |
1271 | ||
1272 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1273 | return -ENOMEM; | |
1274 | ||
1275 | index = get_netdev_queue_index(queue); | |
1276 | ||
1277 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1278 | if (err) { | |
1279 | free_cpumask_var(mask); | |
1280 | return err; | |
1281 | } | |
1282 | ||
537c00de | 1283 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1284 | |
1285 | free_cpumask_var(mask); | |
1d24eb48 | 1286 | |
537c00de | 1287 | return err ? : len; |
1d24eb48 TH |
1288 | } |
1289 | ||
1290 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1291 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
ccf5ff69 | 1292 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1293 | |
1294 | static struct attribute *netdev_queue_default_attrs[] = { | |
ccf5ff69 | 1295 | &queue_trans_timeout.attr, |
8d059b0f | 1296 | &queue_traffic_class.attr, |
ccf5ff69 | 1297 | #ifdef CONFIG_XPS |
1d24eb48 | 1298 | &xps_cpus_attribute.attr, |
822b3b2e | 1299 | &queue_tx_maxrate.attr, |
ccf5ff69 | 1300 | #endif |
1d24eb48 TH |
1301 | NULL |
1302 | }; | |
1303 | ||
1304 | static void netdev_queue_release(struct kobject *kobj) | |
1305 | { | |
1306 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1307 | |
1d24eb48 TH |
1308 | memset(kobj, 0, sizeof(*kobj)); |
1309 | dev_put(queue->dev); | |
1310 | } | |
1311 | ||
82ef3d5d WC |
1312 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1313 | { | |
1314 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1315 | struct device *dev = &queue->dev->dev; | |
1316 | const void *ns = NULL; | |
1317 | ||
1318 | if (dev->class && dev->class->ns_type) | |
1319 | ns = dev->class->namespace(dev); | |
1320 | ||
1321 | return ns; | |
1322 | } | |
1323 | ||
1d24eb48 TH |
1324 | static struct kobj_type netdev_queue_ktype = { |
1325 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1326 | .release = netdev_queue_release, | |
1327 | .default_attrs = netdev_queue_default_attrs, | |
82ef3d5d | 1328 | .namespace = netdev_queue_namespace, |
1d24eb48 TH |
1329 | }; |
1330 | ||
6b53dafe | 1331 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1332 | { |
6b53dafe | 1333 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1334 | struct kobject *kobj = &queue->kobj; |
1335 | int error = 0; | |
1336 | ||
6b53dafe | 1337 | kobj->kset = dev->queues_kset; |
1d24eb48 TH |
1338 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
1339 | "tx-%u", index); | |
114cf580 | 1340 | if (error) |
d0d66837 | 1341 | return error; |
114cf580 TH |
1342 | |
1343 | #ifdef CONFIG_BQL | |
1344 | error = sysfs_create_group(kobj, &dql_group); | |
d0d66837 | 1345 | if (error) { |
1346 | kobject_put(kobj); | |
1347 | return error; | |
1348 | } | |
114cf580 | 1349 | #endif |
1d24eb48 TH |
1350 | |
1351 | kobject_uevent(kobj, KOBJ_ADD); | |
1352 | dev_hold(queue->dev); | |
1353 | ||
114cf580 | 1354 | return 0; |
1d24eb48 | 1355 | } |
ccf5ff69 | 1356 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1357 | |
1358 | int | |
6b53dafe | 1359 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1360 | { |
ccf5ff69 | 1361 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1362 | int i; |
1363 | int error = 0; | |
1364 | ||
1365 | for (i = old_num; i < new_num; i++) { | |
6b53dafe | 1366 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1367 | if (error) { |
1368 | new_num = old_num; | |
1369 | break; | |
1370 | } | |
1371 | } | |
1372 | ||
114cf580 | 1373 | while (--i >= new_num) { |
6b53dafe | 1374 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 | 1375 | |
91864f58 | 1376 | if (!atomic_read(&dev_net(dev)->count)) |
002d8a1a | 1377 | queue->kobj.uevent_suppress = 1; |
114cf580 TH |
1378 | #ifdef CONFIG_BQL |
1379 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1380 | #endif | |
1381 | kobject_put(&queue->kobj); | |
1382 | } | |
1d24eb48 TH |
1383 | |
1384 | return error; | |
bf264145 TH |
1385 | #else |
1386 | return 0; | |
ccf5ff69 | 1387 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1388 | } |
1389 | ||
6b53dafe | 1390 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1391 | { |
bf264145 | 1392 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1393 | |
ccf5ff69 | 1394 | #ifdef CONFIG_SYSFS |
6b53dafe WC |
1395 | dev->queues_kset = kset_create_and_add("queues", |
1396 | NULL, &dev->dev.kobj); | |
1397 | if (!dev->queues_kset) | |
62fe0b40 | 1398 | return -ENOMEM; |
6b53dafe | 1399 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1400 | #endif |
6b53dafe | 1401 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1402 | |
6b53dafe | 1403 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1404 | if (error) |
1405 | goto error; | |
bf264145 | 1406 | rxq = real_rx; |
1d24eb48 | 1407 | |
6b53dafe | 1408 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1409 | if (error) |
1410 | goto error; | |
bf264145 | 1411 | txq = real_tx; |
1d24eb48 TH |
1412 | |
1413 | return 0; | |
1414 | ||
1415 | error: | |
6b53dafe WC |
1416 | netdev_queue_update_kobjects(dev, txq, 0); |
1417 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
1d24eb48 | 1418 | return error; |
62fe0b40 | 1419 | } |
0a9627f2 | 1420 | |
6b53dafe | 1421 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1422 | { |
bf264145 TH |
1423 | int real_rx = 0, real_tx = 0; |
1424 | ||
a953be53 | 1425 | #ifdef CONFIG_SYSFS |
6b53dafe | 1426 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1427 | #endif |
6b53dafe | 1428 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1429 | |
6b53dafe WC |
1430 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1431 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
ccf5ff69 | 1432 | #ifdef CONFIG_SYSFS |
6b53dafe | 1433 | kset_unregister(dev->queues_kset); |
bf264145 | 1434 | #endif |
0a9627f2 | 1435 | } |
608b4b95 | 1436 | |
7dc5dbc8 EB |
1437 | static bool net_current_may_mount(void) |
1438 | { | |
1439 | struct net *net = current->nsproxy->net_ns; | |
1440 | ||
1441 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1442 | } | |
1443 | ||
a685e089 | 1444 | static void *net_grab_current_ns(void) |
608b4b95 | 1445 | { |
a685e089 AV |
1446 | struct net *ns = current->nsproxy->net_ns; |
1447 | #ifdef CONFIG_NET_NS | |
1448 | if (ns) | |
c122e14d | 1449 | refcount_inc(&ns->passive); |
a685e089 AV |
1450 | #endif |
1451 | return ns; | |
608b4b95 EB |
1452 | } |
1453 | ||
1454 | static const void *net_initial_ns(void) | |
1455 | { | |
1456 | return &init_net; | |
1457 | } | |
1458 | ||
1459 | static const void *net_netlink_ns(struct sock *sk) | |
1460 | { | |
1461 | return sock_net(sk); | |
1462 | } | |
1463 | ||
04600794 | 1464 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1465 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1466 | .current_may_mount = net_current_may_mount, |
a685e089 | 1467 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1468 | .netlink_ns = net_netlink_ns, |
1469 | .initial_ns = net_initial_ns, | |
a685e089 | 1470 | .drop_ns = net_drop_ns, |
608b4b95 | 1471 | }; |
04600794 | 1472 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1473 | |
7eff2e7a | 1474 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1475 | { |
43cb76d9 | 1476 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1477 | int retval; |
1da177e4 | 1478 | |
312c004d | 1479 | /* pass interface to uevent. */ |
7eff2e7a | 1480 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1481 | if (retval) |
1482 | goto exit; | |
ca2f37db JT |
1483 | |
1484 | /* pass ifindex to uevent. | |
1485 | * ifindex is useful as it won't change (interface name may change) | |
1486 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1487 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1488 | |
bf62456e | 1489 | exit: |
bf62456e | 1490 | return retval; |
1da177e4 | 1491 | } |
1da177e4 LT |
1492 | |
1493 | /* | |
4ec93edb | 1494 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1495 | * Called when last reference to device kobject is gone. |
1da177e4 | 1496 | */ |
43cb76d9 | 1497 | static void netdev_release(struct device *d) |
1da177e4 | 1498 | { |
43cb76d9 | 1499 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1500 | |
1501 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1502 | ||
0b815a1a | 1503 | kfree(dev->ifalias); |
74d332c1 | 1504 | netdev_freemem(dev); |
1da177e4 LT |
1505 | } |
1506 | ||
608b4b95 EB |
1507 | static const void *net_namespace(struct device *d) |
1508 | { | |
5c29482d GT |
1509 | struct net_device *dev = to_net_dev(d); |
1510 | ||
608b4b95 EB |
1511 | return dev_net(dev); |
1512 | } | |
1513 | ||
e6d473e6 | 1514 | static struct class net_class __ro_after_init = { |
1da177e4 | 1515 | .name = "net", |
43cb76d9 | 1516 | .dev_release = netdev_release, |
6be8aeef | 1517 | .dev_groups = net_class_groups, |
43cb76d9 | 1518 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1519 | .ns_type = &net_ns_type_operations, |
1520 | .namespace = net_namespace, | |
1da177e4 LT |
1521 | }; |
1522 | ||
aa836df9 FF |
1523 | #ifdef CONFIG_OF_NET |
1524 | static int of_dev_node_match(struct device *dev, const void *data) | |
1525 | { | |
1526 | int ret = 0; | |
1527 | ||
1528 | if (dev->parent) | |
1529 | ret = dev->parent->of_node == data; | |
1530 | ||
1531 | return ret == 0 ? dev->of_node == data : ret; | |
1532 | } | |
1533 | ||
9861f720 RK |
1534 | /* |
1535 | * of_find_net_device_by_node - lookup the net device for the device node | |
1536 | * @np: OF device node | |
1537 | * | |
1538 | * Looks up the net_device structure corresponding with the device node. | |
1539 | * If successful, returns a pointer to the net_device with the embedded | |
1540 | * struct device refcount incremented by one, or NULL on failure. The | |
1541 | * refcount must be dropped when done with the net_device. | |
1542 | */ | |
aa836df9 FF |
1543 | struct net_device *of_find_net_device_by_node(struct device_node *np) |
1544 | { | |
1545 | struct device *dev; | |
1546 | ||
1547 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1548 | if (!dev) | |
1549 | return NULL; | |
1550 | ||
1551 | return to_net_dev(dev); | |
1552 | } | |
1553 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1554 | #endif | |
1555 | ||
9093bbb2 SH |
1556 | /* Delete sysfs entries but hold kobject reference until after all |
1557 | * netdev references are gone. | |
1558 | */ | |
6b53dafe | 1559 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1560 | { |
6b53dafe | 1561 | struct device *dev = &(ndev->dev); |
9093bbb2 | 1562 | |
91864f58 | 1563 | if (!atomic_read(&dev_net(ndev)->count)) |
002d8a1a AV |
1564 | dev_set_uevent_suppress(dev, 1); |
1565 | ||
9093bbb2 | 1566 | kobject_get(&dev->kobj); |
3891845e | 1567 | |
6b53dafe | 1568 | remove_queue_kobjects(ndev); |
0a9627f2 | 1569 | |
9802c8e2 ML |
1570 | pm_runtime_set_memalloc_noio(dev, false); |
1571 | ||
9093bbb2 | 1572 | device_del(dev); |
1da177e4 LT |
1573 | } |
1574 | ||
1575 | /* Create sysfs entries for network device. */ | |
6b53dafe | 1576 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 1577 | { |
6b53dafe WC |
1578 | struct device *dev = &(ndev->dev); |
1579 | const struct attribute_group **groups = ndev->sysfs_groups; | |
0a9627f2 | 1580 | int error = 0; |
1da177e4 | 1581 | |
a1b3f594 | 1582 | device_initialize(dev); |
43cb76d9 | 1583 | dev->class = &net_class; |
6b53dafe | 1584 | dev->platform_data = ndev; |
43cb76d9 | 1585 | dev->groups = groups; |
1da177e4 | 1586 | |
6b53dafe | 1587 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 1588 | |
8b41d188 | 1589 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1590 | /* Allow for a device specific group */ |
1591 | if (*groups) | |
1592 | groups++; | |
1da177e4 | 1593 | |
0c509a6c | 1594 | *groups++ = &netstat_group; |
38c1a01c JB |
1595 | |
1596 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
6b53dafe | 1597 | if (ndev->ieee80211_ptr) |
38c1a01c JB |
1598 | *groups++ = &wireless_group; |
1599 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
6b53dafe | 1600 | else if (ndev->wireless_handlers) |
38c1a01c JB |
1601 | *groups++ = &wireless_group; |
1602 | #endif | |
1603 | #endif | |
8b41d188 | 1604 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1605 | |
0a9627f2 TH |
1606 | error = device_add(dev); |
1607 | if (error) | |
1608 | return error; | |
1609 | ||
6b53dafe | 1610 | error = register_queue_kobjects(ndev); |
0a9627f2 TH |
1611 | if (error) { |
1612 | device_del(dev); | |
1613 | return error; | |
1614 | } | |
1615 | ||
9802c8e2 ML |
1616 | pm_runtime_set_memalloc_noio(dev, true); |
1617 | ||
0a9627f2 | 1618 | return error; |
1da177e4 LT |
1619 | } |
1620 | ||
b793dc5c | 1621 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1622 | const void *ns) |
b8a9787e | 1623 | { |
58292cbe | 1624 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1625 | } |
58292cbe | 1626 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1627 | |
b793dc5c | 1628 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1629 | const void *ns) |
b8a9787e | 1630 | { |
58292cbe | 1631 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1632 | } |
58292cbe | 1633 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1634 | |
a48d4bb0 | 1635 | int __init netdev_kobject_init(void) |
1da177e4 | 1636 | { |
608b4b95 | 1637 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1638 | return class_register(&net_class); |
1639 | } |