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