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