Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
4ec93edb | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/netdevice.h> | |
aecbe01e | 15 | #include <net/switchdev.h> |
1da177e4 | 16 | #include <linux/if_arp.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
174cd4b1 | 18 | #include <linux/sched/signal.h> |
608b4b95 | 19 | #include <linux/nsproxy.h> |
1da177e4 | 20 | #include <net/sock.h> |
608b4b95 | 21 | #include <net/net_namespace.h> |
1da177e4 | 22 | #include <linux/rtnetlink.h> |
fec5e652 | 23 | #include <linux/vmalloc.h> |
bc3b2d7f | 24 | #include <linux/export.h> |
114cf580 | 25 | #include <linux/jiffies.h> |
9802c8e2 | 26 | #include <linux/pm_runtime.h> |
aa836df9 | 27 | #include <linux/of.h> |
88832a22 | 28 | #include <linux/of_net.h> |
1da177e4 | 29 | |
342709ef PE |
30 | #include "net-sysfs.h" |
31 | ||
8b41d188 | 32 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
33 | static const char fmt_hex[] = "%#x\n"; |
34 | static const char fmt_dec[] = "%d\n"; | |
35 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 36 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 37 | |
4ec93edb | 38 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 39 | { |
fe9925b5 | 40 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
41 | } |
42 | ||
43 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
44 | static ssize_t netdev_show(const struct device *dev, |
45 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
46 | ssize_t (*format)(const struct net_device *, char *)) |
47 | { | |
6b53dafe | 48 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
49 | ssize_t ret = -EINVAL; |
50 | ||
51 | read_lock(&dev_base_lock); | |
6b53dafe WC |
52 | if (dev_isalive(ndev)) |
53 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
54 | read_unlock(&dev_base_lock); |
55 | ||
56 | return ret; | |
57 | } | |
58 | ||
59 | /* generate a show function for simple field */ | |
60 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 61 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 62 | { \ |
6b53dafe | 63 | return sprintf(buf, format_string, dev->field); \ |
1da177e4 | 64 | } \ |
6be8aeef | 65 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 66 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 67 | { \ |
43cb76d9 | 68 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
69 | } \ |
70 | ||
71 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
72 | NETDEVICE_SHOW(field, format_string); \ | |
73 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 74 | |
6be8aeef GKH |
75 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
76 | NETDEVICE_SHOW(field, format_string); \ | |
77 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
78 | |
79 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 80 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
81 | const char *buf, size_t len, |
82 | int (*set)(struct net_device *, unsigned long)) | |
83 | { | |
5e1fccc0 EB |
84 | struct net_device *netdev = to_net_dev(dev); |
85 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
86 | unsigned long new; |
87 | int ret = -EINVAL; | |
88 | ||
5e1fccc0 | 89 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
90 | return -EPERM; |
91 | ||
e1e420c7 SK |
92 | ret = kstrtoul(buf, 0, &new); |
93 | if (ret) | |
1da177e4 LT |
94 | goto err; |
95 | ||
5a5990d3 | 96 | if (!rtnl_trylock()) |
336ca57c | 97 | return restart_syscall(); |
5a5990d3 | 98 | |
5e1fccc0 | 99 | if (dev_isalive(netdev)) { |
6648c65e | 100 | ret = (*set)(netdev, new); |
101 | if (ret == 0) | |
1da177e4 LT |
102 | ret = len; |
103 | } | |
104 | rtnl_unlock(); | |
105 | err: | |
106 | return ret; | |
107 | } | |
108 | ||
6be8aeef | 109 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 110 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
111 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
112 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
6be8aeef GKH |
113 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); |
114 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
115 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 | 116 | |
a54acb3a ND |
117 | static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, |
118 | char *buf) | |
119 | { | |
120 | struct net_device *ndev = to_net_dev(dev); | |
121 | ||
122 | return sprintf(buf, fmt_dec, dev_get_iflink(ndev)); | |
123 | } | |
124 | static DEVICE_ATTR_RO(iflink); | |
125 | ||
6b53dafe | 126 | static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) |
685343fc | 127 | { |
6b53dafe | 128 | return sprintf(buf, fmt_dec, dev->name_assign_type); |
685343fc TG |
129 | } |
130 | ||
131 | static ssize_t name_assign_type_show(struct device *dev, | |
132 | struct device_attribute *attr, | |
133 | char *buf) | |
134 | { | |
6b53dafe | 135 | struct net_device *ndev = to_net_dev(dev); |
685343fc TG |
136 | ssize_t ret = -EINVAL; |
137 | ||
6b53dafe | 138 | if (ndev->name_assign_type != NET_NAME_UNKNOWN) |
685343fc TG |
139 | ret = netdev_show(dev, attr, buf, format_name_assign_type); |
140 | ||
141 | return ret; | |
142 | } | |
143 | static DEVICE_ATTR_RO(name_assign_type); | |
144 | ||
1da177e4 | 145 | /* use same locking rules as GIFHWADDR ioctl's */ |
6be8aeef | 146 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 147 | char *buf) |
1da177e4 | 148 | { |
6b53dafe | 149 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
150 | ssize_t ret = -EINVAL; |
151 | ||
152 | read_lock(&dev_base_lock); | |
6b53dafe WC |
153 | if (dev_isalive(ndev)) |
154 | ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); | |
1da177e4 LT |
155 | read_unlock(&dev_base_lock); |
156 | return ret; | |
157 | } | |
6be8aeef | 158 | static DEVICE_ATTR_RO(address); |
1da177e4 | 159 | |
6be8aeef GKH |
160 | static ssize_t broadcast_show(struct device *dev, |
161 | struct device_attribute *attr, char *buf) | |
1da177e4 | 162 | { |
6b53dafe | 163 | struct net_device *ndev = to_net_dev(dev); |
6648c65e | 164 | |
6b53dafe WC |
165 | if (dev_isalive(ndev)) |
166 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
167 | return -EINVAL; |
168 | } | |
6be8aeef | 169 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 170 | |
6b53dafe | 171 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 172 | { |
6b53dafe | 173 | if (!netif_running(dev)) |
fdae0fde | 174 | return -EINVAL; |
6648c65e | 175 | return dev_change_carrier(dev, (bool)new_carrier); |
fdae0fde JP |
176 | } |
177 | ||
6be8aeef GKH |
178 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
179 | const char *buf, size_t len) | |
fdae0fde JP |
180 | { |
181 | return netdev_store(dev, attr, buf, len, change_carrier); | |
182 | } | |
183 | ||
6be8aeef | 184 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 185 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
186 | { |
187 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 188 | |
189 | if (netif_running(netdev)) | |
1da177e4 | 190 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
6648c65e | 191 | |
1da177e4 LT |
192 | return -EINVAL; |
193 | } | |
6be8aeef | 194 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 195 | |
6be8aeef | 196 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
197 | struct device_attribute *attr, char *buf) |
198 | { | |
199 | struct net_device *netdev = to_net_dev(dev); | |
200 | int ret = -EINVAL; | |
201 | ||
202 | if (!rtnl_trylock()) | |
203 | return restart_syscall(); | |
204 | ||
8ae6daca | 205 | if (netif_running(netdev)) { |
7cad1bac DD |
206 | struct ethtool_link_ksettings cmd; |
207 | ||
208 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) | |
209 | ret = sprintf(buf, fmt_dec, cmd.base.speed); | |
d519e17e AG |
210 | } |
211 | rtnl_unlock(); | |
212 | return ret; | |
213 | } | |
6be8aeef | 214 | static DEVICE_ATTR_RO(speed); |
d519e17e | 215 | |
6be8aeef | 216 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
217 | struct device_attribute *attr, char *buf) |
218 | { | |
219 | struct net_device *netdev = to_net_dev(dev); | |
220 | int ret = -EINVAL; | |
221 | ||
222 | if (!rtnl_trylock()) | |
223 | return restart_syscall(); | |
224 | ||
8ae6daca | 225 | if (netif_running(netdev)) { |
7cad1bac DD |
226 | struct ethtool_link_ksettings cmd; |
227 | ||
228 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) { | |
c6c13965 | 229 | const char *duplex; |
7cad1bac DD |
230 | |
231 | switch (cmd.base.duplex) { | |
c6c13965 NA |
232 | case DUPLEX_HALF: |
233 | duplex = "half"; | |
234 | break; | |
235 | case DUPLEX_FULL: | |
236 | duplex = "full"; | |
237 | break; | |
238 | default: | |
239 | duplex = "unknown"; | |
240 | break; | |
241 | } | |
242 | ret = sprintf(buf, "%s\n", duplex); | |
243 | } | |
d519e17e AG |
244 | } |
245 | rtnl_unlock(); | |
246 | return ret; | |
247 | } | |
6be8aeef | 248 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 249 | |
6be8aeef | 250 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 251 | struct device_attribute *attr, char *buf) |
b00055aa SR |
252 | { |
253 | struct net_device *netdev = to_net_dev(dev); | |
254 | ||
255 | if (netif_running(netdev)) | |
256 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
257 | ||
258 | return -EINVAL; | |
259 | } | |
6be8aeef | 260 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 261 | |
36cbd3dc | 262 | static const char *const operstates[] = { |
b00055aa SR |
263 | "unknown", |
264 | "notpresent", /* currently unused */ | |
265 | "down", | |
266 | "lowerlayerdown", | |
267 | "testing", /* currently unused */ | |
268 | "dormant", | |
269 | "up" | |
270 | }; | |
271 | ||
6be8aeef | 272 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 273 | struct device_attribute *attr, char *buf) |
b00055aa SR |
274 | { |
275 | const struct net_device *netdev = to_net_dev(dev); | |
276 | unsigned char operstate; | |
277 | ||
278 | read_lock(&dev_base_lock); | |
279 | operstate = netdev->operstate; | |
280 | if (!netif_running(netdev)) | |
281 | operstate = IF_OPER_DOWN; | |
282 | read_unlock(&dev_base_lock); | |
283 | ||
e3a5cd9e | 284 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
285 | return -EINVAL; /* should not happen */ |
286 | ||
287 | return sprintf(buf, "%s\n", operstates[operstate]); | |
288 | } | |
6be8aeef | 289 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 290 | |
2d3b479d | 291 | static ssize_t carrier_changes_show(struct device *dev, |
292 | struct device_attribute *attr, | |
293 | char *buf) | |
294 | { | |
295 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 296 | |
2d3b479d | 297 | return sprintf(buf, fmt_dec, |
b2d3bcfa DD |
298 | atomic_read(&netdev->carrier_up_count) + |
299 | atomic_read(&netdev->carrier_down_count)); | |
2d3b479d | 300 | } |
301 | static DEVICE_ATTR_RO(carrier_changes); | |
302 | ||
b2d3bcfa DD |
303 | static ssize_t carrier_up_count_show(struct device *dev, |
304 | struct device_attribute *attr, | |
305 | char *buf) | |
306 | { | |
307 | struct net_device *netdev = to_net_dev(dev); | |
308 | ||
309 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_up_count)); | |
310 | } | |
311 | static DEVICE_ATTR_RO(carrier_up_count); | |
312 | ||
313 | static ssize_t carrier_down_count_show(struct device *dev, | |
314 | struct device_attribute *attr, | |
315 | char *buf) | |
316 | { | |
317 | struct net_device *netdev = to_net_dev(dev); | |
318 | ||
319 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_down_count)); | |
320 | } | |
321 | static DEVICE_ATTR_RO(carrier_down_count); | |
322 | ||
1da177e4 | 323 | /* read-write attributes */ |
1da177e4 | 324 | |
6b53dafe | 325 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 326 | { |
6648c65e | 327 | return dev_set_mtu(dev, (int)new_mtu); |
1da177e4 LT |
328 | } |
329 | ||
6be8aeef | 330 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 331 | const char *buf, size_t len) |
1da177e4 | 332 | { |
43cb76d9 | 333 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 334 | } |
6be8aeef | 335 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 336 | |
6b53dafe | 337 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 338 | { |
6648c65e | 339 | return dev_change_flags(dev, (unsigned int)new_flags); |
1da177e4 LT |
340 | } |
341 | ||
6be8aeef | 342 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 343 | const char *buf, size_t len) |
1da177e4 | 344 | { |
43cb76d9 | 345 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 346 | } |
6be8aeef | 347 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 348 | |
6be8aeef | 349 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
350 | struct device_attribute *attr, |
351 | const char *buf, size_t len) | |
1da177e4 | 352 | { |
5e1fccc0 EB |
353 | if (!capable(CAP_NET_ADMIN)) |
354 | return -EPERM; | |
355 | ||
6a643ddb | 356 | return netdev_store(dev, attr, buf, len, dev_change_tx_queue_len); |
1da177e4 | 357 | } |
0cd29503 | 358 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec); |
1da177e4 | 359 | |
3b47d303 ED |
360 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
361 | { | |
362 | dev->gro_flush_timeout = val; | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
6648c65e | 367 | struct device_attribute *attr, |
368 | const char *buf, size_t len) | |
3b47d303 ED |
369 | { |
370 | if (!capable(CAP_NET_ADMIN)) | |
371 | return -EPERM; | |
372 | ||
373 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
374 | } | |
375 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
376 | ||
6be8aeef | 377 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
378 | const char *buf, size_t len) |
379 | { | |
380 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 381 | struct net *net = dev_net(netdev); |
0b815a1a | 382 | size_t count = len; |
c92eb77a | 383 | ssize_t ret = 0; |
0b815a1a | 384 | |
5e1fccc0 | 385 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
386 | return -EPERM; |
387 | ||
388 | /* ignore trailing newline */ | |
389 | if (len > 0 && buf[len - 1] == '\n') | |
390 | --count; | |
391 | ||
c92eb77a RP |
392 | if (!rtnl_trylock()) |
393 | return restart_syscall(); | |
0b815a1a | 394 | |
c92eb77a RP |
395 | if (dev_isalive(netdev)) { |
396 | ret = dev_set_alias(netdev, buf, count); | |
397 | if (ret < 0) | |
398 | goto err; | |
399 | ret = len; | |
400 | netdev_state_change(netdev); | |
401 | } | |
402 | err: | |
403 | rtnl_unlock(); | |
404 | ||
405 | return ret; | |
0b815a1a SH |
406 | } |
407 | ||
6be8aeef | 408 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
409 | struct device_attribute *attr, char *buf) |
410 | { | |
411 | const struct net_device *netdev = to_net_dev(dev); | |
6c557001 | 412 | char tmp[IFALIASZ]; |
0b815a1a SH |
413 | ssize_t ret = 0; |
414 | ||
6c557001 FW |
415 | ret = dev_get_alias(netdev, tmp, sizeof(tmp)); |
416 | if (ret > 0) | |
417 | ret = sprintf(buf, "%s\n", tmp); | |
0b815a1a SH |
418 | return ret; |
419 | } | |
6be8aeef | 420 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 421 | |
6b53dafe | 422 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 423 | { |
6648c65e | 424 | dev_set_group(dev, (int)new_group); |
a512b92b VD |
425 | return 0; |
426 | } | |
427 | ||
6be8aeef GKH |
428 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
429 | const char *buf, size_t len) | |
a512b92b VD |
430 | { |
431 | return netdev_store(dev, attr, buf, len, change_group); | |
432 | } | |
6be8aeef GKH |
433 | NETDEVICE_SHOW(group, fmt_dec); |
434 | static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); | |
435 | ||
d746d707 AK |
436 | static int change_proto_down(struct net_device *dev, unsigned long proto_down) |
437 | { | |
6648c65e | 438 | return dev_change_proto_down(dev, (bool)proto_down); |
d746d707 AK |
439 | } |
440 | ||
441 | static ssize_t proto_down_store(struct device *dev, | |
442 | struct device_attribute *attr, | |
443 | const char *buf, size_t len) | |
444 | { | |
445 | return netdev_store(dev, attr, buf, len, change_proto_down); | |
446 | } | |
447 | NETDEVICE_SHOW_RW(proto_down, fmt_dec); | |
448 | ||
cc998ff8 | 449 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
450 | struct device_attribute *attr, char *buf) |
451 | { | |
452 | struct net_device *netdev = to_net_dev(dev); | |
453 | ssize_t ret = -EINVAL; | |
454 | ||
455 | if (!rtnl_trylock()) | |
456 | return restart_syscall(); | |
457 | ||
458 | if (dev_isalive(netdev)) { | |
02637fce | 459 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
460 | |
461 | ret = dev_get_phys_port_id(netdev, &ppid); | |
462 | if (!ret) | |
463 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
464 | } | |
465 | rtnl_unlock(); | |
466 | ||
467 | return ret; | |
468 | } | |
cc998ff8 LT |
469 | static DEVICE_ATTR_RO(phys_port_id); |
470 | ||
db24a904 DA |
471 | static ssize_t phys_port_name_show(struct device *dev, |
472 | struct device_attribute *attr, char *buf) | |
473 | { | |
474 | struct net_device *netdev = to_net_dev(dev); | |
475 | ssize_t ret = -EINVAL; | |
476 | ||
477 | if (!rtnl_trylock()) | |
478 | return restart_syscall(); | |
479 | ||
480 | if (dev_isalive(netdev)) { | |
481 | char name[IFNAMSIZ]; | |
482 | ||
483 | ret = dev_get_phys_port_name(netdev, name, sizeof(name)); | |
484 | if (!ret) | |
485 | ret = sprintf(buf, "%s\n", name); | |
486 | } | |
487 | rtnl_unlock(); | |
488 | ||
489 | return ret; | |
490 | } | |
491 | static DEVICE_ATTR_RO(phys_port_name); | |
492 | ||
aecbe01e JP |
493 | static ssize_t phys_switch_id_show(struct device *dev, |
494 | struct device_attribute *attr, char *buf) | |
495 | { | |
496 | struct net_device *netdev = to_net_dev(dev); | |
497 | ssize_t ret = -EINVAL; | |
498 | ||
499 | if (!rtnl_trylock()) | |
500 | return restart_syscall(); | |
501 | ||
502 | if (dev_isalive(netdev)) { | |
f8e20a9f | 503 | struct switchdev_attr attr = { |
6ff64f6f | 504 | .orig_dev = netdev, |
1f868398 | 505 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
f8e20a9f SF |
506 | .flags = SWITCHDEV_F_NO_RECURSE, |
507 | }; | |
aecbe01e | 508 | |
f8e20a9f | 509 | ret = switchdev_port_attr_get(netdev, &attr); |
aecbe01e | 510 | if (!ret) |
42275bd8 SF |
511 | ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len, |
512 | attr.u.ppid.id); | |
aecbe01e JP |
513 | } |
514 | rtnl_unlock(); | |
515 | ||
516 | return ret; | |
517 | } | |
518 | static DEVICE_ATTR_RO(phys_switch_id); | |
519 | ||
ec6cc599 | 520 | static struct attribute *net_class_attrs[] __ro_after_init = { |
6be8aeef GKH |
521 | &dev_attr_netdev_group.attr, |
522 | &dev_attr_type.attr, | |
523 | &dev_attr_dev_id.attr, | |
3f85944f | 524 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
525 | &dev_attr_iflink.attr, |
526 | &dev_attr_ifindex.attr, | |
685343fc | 527 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
528 | &dev_attr_addr_assign_type.attr, |
529 | &dev_attr_addr_len.attr, | |
530 | &dev_attr_link_mode.attr, | |
531 | &dev_attr_address.attr, | |
532 | &dev_attr_broadcast.attr, | |
533 | &dev_attr_speed.attr, | |
534 | &dev_attr_duplex.attr, | |
535 | &dev_attr_dormant.attr, | |
536 | &dev_attr_operstate.attr, | |
2d3b479d | 537 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
538 | &dev_attr_ifalias.attr, |
539 | &dev_attr_carrier.attr, | |
540 | &dev_attr_mtu.attr, | |
541 | &dev_attr_flags.attr, | |
542 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 543 | &dev_attr_gro_flush_timeout.attr, |
cc998ff8 | 544 | &dev_attr_phys_port_id.attr, |
db24a904 | 545 | &dev_attr_phys_port_name.attr, |
aecbe01e | 546 | &dev_attr_phys_switch_id.attr, |
d746d707 | 547 | &dev_attr_proto_down.attr, |
b2d3bcfa DD |
548 | &dev_attr_carrier_up_count.attr, |
549 | &dev_attr_carrier_down_count.attr, | |
6be8aeef | 550 | NULL, |
1da177e4 | 551 | }; |
6be8aeef | 552 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
553 | |
554 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
555 | static ssize_t netstat_show(const struct device *d, |
556 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
557 | unsigned long offset) |
558 | { | |
43cb76d9 | 559 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
560 | ssize_t ret = -EINVAL; |
561 | ||
be1f3c2c | 562 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
6648c65e | 563 | offset % sizeof(u64) != 0); |
1da177e4 LT |
564 | |
565 | read_lock(&dev_base_lock); | |
96e74088 | 566 | if (dev_isalive(dev)) { |
28172739 ED |
567 | struct rtnl_link_stats64 temp; |
568 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
569 | ||
6648c65e | 570 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *)stats) + offset)); |
96e74088 | 571 | } |
1da177e4 LT |
572 | read_unlock(&dev_base_lock); |
573 | return ret; | |
574 | } | |
575 | ||
576 | /* generate a read-only statistics attribute */ | |
577 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 578 | static ssize_t name##_show(struct device *d, \ |
6648c65e | 579 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 580 | { \ |
43cb76d9 | 581 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 582 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 583 | } \ |
6be8aeef | 584 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
585 | |
586 | NETSTAT_ENTRY(rx_packets); | |
587 | NETSTAT_ENTRY(tx_packets); | |
588 | NETSTAT_ENTRY(rx_bytes); | |
589 | NETSTAT_ENTRY(tx_bytes); | |
590 | NETSTAT_ENTRY(rx_errors); | |
591 | NETSTAT_ENTRY(tx_errors); | |
592 | NETSTAT_ENTRY(rx_dropped); | |
593 | NETSTAT_ENTRY(tx_dropped); | |
594 | NETSTAT_ENTRY(multicast); | |
595 | NETSTAT_ENTRY(collisions); | |
596 | NETSTAT_ENTRY(rx_length_errors); | |
597 | NETSTAT_ENTRY(rx_over_errors); | |
598 | NETSTAT_ENTRY(rx_crc_errors); | |
599 | NETSTAT_ENTRY(rx_frame_errors); | |
600 | NETSTAT_ENTRY(rx_fifo_errors); | |
601 | NETSTAT_ENTRY(rx_missed_errors); | |
602 | NETSTAT_ENTRY(tx_aborted_errors); | |
603 | NETSTAT_ENTRY(tx_carrier_errors); | |
604 | NETSTAT_ENTRY(tx_fifo_errors); | |
605 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
606 | NETSTAT_ENTRY(tx_window_errors); | |
607 | NETSTAT_ENTRY(rx_compressed); | |
608 | NETSTAT_ENTRY(tx_compressed); | |
6e7333d3 | 609 | NETSTAT_ENTRY(rx_nohandler); |
1da177e4 | 610 | |
ec6cc599 | 611 | static struct attribute *netstat_attrs[] __ro_after_init = { |
43cb76d9 GKH |
612 | &dev_attr_rx_packets.attr, |
613 | &dev_attr_tx_packets.attr, | |
614 | &dev_attr_rx_bytes.attr, | |
615 | &dev_attr_tx_bytes.attr, | |
616 | &dev_attr_rx_errors.attr, | |
617 | &dev_attr_tx_errors.attr, | |
618 | &dev_attr_rx_dropped.attr, | |
619 | &dev_attr_tx_dropped.attr, | |
620 | &dev_attr_multicast.attr, | |
621 | &dev_attr_collisions.attr, | |
622 | &dev_attr_rx_length_errors.attr, | |
623 | &dev_attr_rx_over_errors.attr, | |
624 | &dev_attr_rx_crc_errors.attr, | |
625 | &dev_attr_rx_frame_errors.attr, | |
626 | &dev_attr_rx_fifo_errors.attr, | |
627 | &dev_attr_rx_missed_errors.attr, | |
628 | &dev_attr_tx_aborted_errors.attr, | |
629 | &dev_attr_tx_carrier_errors.attr, | |
630 | &dev_attr_tx_fifo_errors.attr, | |
631 | &dev_attr_tx_heartbeat_errors.attr, | |
632 | &dev_attr_tx_window_errors.attr, | |
633 | &dev_attr_rx_compressed.attr, | |
634 | &dev_attr_tx_compressed.attr, | |
6e7333d3 | 635 | &dev_attr_rx_nohandler.attr, |
1da177e4 LT |
636 | NULL |
637 | }; | |
638 | ||
38ef00cc | 639 | static const struct attribute_group netstat_group = { |
1da177e4 LT |
640 | .name = "statistics", |
641 | .attrs = netstat_attrs, | |
642 | }; | |
38c1a01c JB |
643 | |
644 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
645 | static struct attribute *wireless_attrs[] = { | |
646 | NULL | |
647 | }; | |
648 | ||
38ef00cc | 649 | static const struct attribute_group wireless_group = { |
38c1a01c JB |
650 | .name = "wireless", |
651 | .attrs = wireless_attrs, | |
652 | }; | |
653 | #endif | |
6be8aeef GKH |
654 | |
655 | #else /* CONFIG_SYSFS */ | |
656 | #define net_class_groups NULL | |
d6523ddf | 657 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 658 | |
a953be53 | 659 | #ifdef CONFIG_SYSFS |
6648c65e | 660 | #define to_rx_queue_attr(_attr) \ |
661 | container_of(_attr, struct rx_queue_attribute, attr) | |
0a9627f2 TH |
662 | |
663 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
664 | ||
665 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
666 | char *buf) | |
667 | { | |
667e427b | 668 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
669 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
670 | ||
671 | if (!attribute->show) | |
672 | return -EIO; | |
673 | ||
718ad681 | 674 | return attribute->show(queue, buf); |
0a9627f2 TH |
675 | } |
676 | ||
677 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
678 | const char *buf, size_t count) | |
679 | { | |
667e427b | 680 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
681 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
682 | ||
683 | if (!attribute->store) | |
684 | return -EIO; | |
685 | ||
718ad681 | 686 | return attribute->store(queue, buf, count); |
0a9627f2 TH |
687 | } |
688 | ||
fa50d645 | 689 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
690 | .show = rx_queue_attr_show, |
691 | .store = rx_queue_attr_store, | |
692 | }; | |
693 | ||
a953be53 | 694 | #ifdef CONFIG_RPS |
718ad681 | 695 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf) |
0a9627f2 TH |
696 | { |
697 | struct rps_map *map; | |
698 | cpumask_var_t mask; | |
f0906827 | 699 | int i, len; |
0a9627f2 TH |
700 | |
701 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
702 | return -ENOMEM; | |
703 | ||
704 | rcu_read_lock(); | |
705 | map = rcu_dereference(queue->rps_map); | |
706 | if (map) | |
707 | for (i = 0; i < map->len; i++) | |
708 | cpumask_set_cpu(map->cpus[i], mask); | |
709 | ||
f0906827 | 710 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 711 | rcu_read_unlock(); |
0a9627f2 | 712 | free_cpumask_var(mask); |
f0906827 TH |
713 | |
714 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
715 | } |
716 | ||
f5acb907 | 717 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
718ad681 | 718 | const char *buf, size_t len) |
0a9627f2 TH |
719 | { |
720 | struct rps_map *old_map, *map; | |
721 | cpumask_var_t mask; | |
722 | int err, cpu, i; | |
da65ad1f | 723 | static DEFINE_MUTEX(rps_map_mutex); |
0a9627f2 TH |
724 | |
725 | if (!capable(CAP_NET_ADMIN)) | |
726 | return -EPERM; | |
727 | ||
728 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
729 | return -ENOMEM; | |
730 | ||
731 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
732 | if (err) { | |
733 | free_cpumask_var(mask); | |
734 | return err; | |
735 | } | |
736 | ||
95c96174 | 737 | map = kzalloc(max_t(unsigned int, |
6648c65e | 738 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
739 | GFP_KERNEL); | |
0a9627f2 TH |
740 | if (!map) { |
741 | free_cpumask_var(mask); | |
742 | return -ENOMEM; | |
743 | } | |
744 | ||
745 | i = 0; | |
746 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
747 | map->cpus[i++] = cpu; | |
748 | ||
6648c65e | 749 | if (i) { |
0a9627f2 | 750 | map->len = i; |
6648c65e | 751 | } else { |
0a9627f2 TH |
752 | kfree(map); |
753 | map = NULL; | |
754 | } | |
755 | ||
da65ad1f | 756 | mutex_lock(&rps_map_mutex); |
6e3f7faf | 757 | old_map = rcu_dereference_protected(queue->rps_map, |
da65ad1f | 758 | mutex_is_locked(&rps_map_mutex)); |
0a9627f2 | 759 | rcu_assign_pointer(queue->rps_map, map); |
0a9627f2 | 760 | |
adc9300e | 761 | if (map) |
c5905afb | 762 | static_key_slow_inc(&rps_needed); |
10e4ea75 | 763 | if (old_map) |
c5905afb | 764 | static_key_slow_dec(&rps_needed); |
10e4ea75 | 765 | |
da65ad1f | 766 | mutex_unlock(&rps_map_mutex); |
10e4ea75 TH |
767 | |
768 | if (old_map) | |
769 | kfree_rcu(old_map, rcu); | |
770 | ||
0a9627f2 TH |
771 | free_cpumask_var(mask); |
772 | return len; | |
773 | } | |
774 | ||
fec5e652 | 775 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
776 | char *buf) |
777 | { | |
778 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 779 | unsigned long val = 0; |
fec5e652 TH |
780 | |
781 | rcu_read_lock(); | |
782 | flow_table = rcu_dereference(queue->rps_flow_table); | |
783 | if (flow_table) | |
60b778ce | 784 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
785 | rcu_read_unlock(); |
786 | ||
60b778ce | 787 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
788 | } |
789 | ||
fec5e652 TH |
790 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
791 | { | |
792 | struct rps_dev_flow_table *table = container_of(rcu, | |
793 | struct rps_dev_flow_table, rcu); | |
243198d0 | 794 | vfree(table); |
fec5e652 TH |
795 | } |
796 | ||
f5acb907 | 797 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
718ad681 | 798 | const char *buf, size_t len) |
fec5e652 | 799 | { |
60b778ce | 800 | unsigned long mask, count; |
fec5e652 TH |
801 | struct rps_dev_flow_table *table, *old_table; |
802 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 803 | int rc; |
fec5e652 TH |
804 | |
805 | if (!capable(CAP_NET_ADMIN)) | |
806 | return -EPERM; | |
807 | ||
60b778ce ED |
808 | rc = kstrtoul(buf, 0, &count); |
809 | if (rc < 0) | |
810 | return rc; | |
fec5e652 TH |
811 | |
812 | if (count) { | |
60b778ce ED |
813 | mask = count - 1; |
814 | /* mask = roundup_pow_of_two(count) - 1; | |
815 | * without overflows... | |
816 | */ | |
817 | while ((mask | (mask >> 1)) != mask) | |
818 | mask |= (mask >> 1); | |
819 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 820 | * and on 32bit arches, must check |
821 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
822 | */ |
823 | #if BITS_PER_LONG > 32 | |
824 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 825 | return -EINVAL; |
60b778ce ED |
826 | #else |
827 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 828 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
829 | /* Enforce a limit to prevent overflow */ |
830 | return -EINVAL; | |
831 | } | |
60b778ce ED |
832 | #endif |
833 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
834 | if (!table) |
835 | return -ENOMEM; | |
836 | ||
60b778ce ED |
837 | table->mask = mask; |
838 | for (count = 0; count <= mask; count++) | |
839 | table->flows[count].cpu = RPS_NO_CPU; | |
6648c65e | 840 | } else { |
fec5e652 | 841 | table = NULL; |
6648c65e | 842 | } |
fec5e652 TH |
843 | |
844 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
845 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
846 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
847 | rcu_assign_pointer(queue->rps_flow_table, table); |
848 | spin_unlock(&rps_dev_flow_lock); | |
849 | ||
850 | if (old_table) | |
851 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
852 | ||
853 | return len; | |
854 | } | |
855 | ||
667e427b | 856 | static struct rx_queue_attribute rps_cpus_attribute __ro_after_init |
857 | = __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
0a9627f2 | 858 | |
667e427b | 859 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute __ro_after_init |
860 | = __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
861 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
a953be53 | 862 | #endif /* CONFIG_RPS */ |
fec5e652 | 863 | |
667e427b | 864 | static struct attribute *rx_queue_default_attrs[] __ro_after_init = { |
a953be53 | 865 | #ifdef CONFIG_RPS |
0a9627f2 | 866 | &rps_cpus_attribute.attr, |
fec5e652 | 867 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 868 | #endif |
0a9627f2 TH |
869 | NULL |
870 | }; | |
871 | ||
872 | static void rx_queue_release(struct kobject *kobj) | |
873 | { | |
874 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 875 | #ifdef CONFIG_RPS |
6e3f7faf ED |
876 | struct rps_map *map; |
877 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 878 | |
33d480ce | 879 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
880 | if (map) { |
881 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 882 | kfree_rcu(map, rcu); |
9ea19481 | 883 | } |
6e3f7faf | 884 | |
33d480ce | 885 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
886 | if (flow_table) { |
887 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 888 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 889 | } |
a953be53 | 890 | #endif |
0a9627f2 | 891 | |
9ea19481 | 892 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 893 | dev_put(queue->dev); |
0a9627f2 TH |
894 | } |
895 | ||
82ef3d5d WC |
896 | static const void *rx_queue_namespace(struct kobject *kobj) |
897 | { | |
898 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
899 | struct device *dev = &queue->dev->dev; | |
900 | const void *ns = NULL; | |
901 | ||
902 | if (dev->class && dev->class->ns_type) | |
903 | ns = dev->class->namespace(dev); | |
904 | ||
905 | return ns; | |
906 | } | |
907 | ||
667e427b | 908 | static struct kobj_type rx_queue_ktype __ro_after_init = { |
0a9627f2 TH |
909 | .sysfs_ops = &rx_queue_sysfs_ops, |
910 | .release = rx_queue_release, | |
911 | .default_attrs = rx_queue_default_attrs, | |
82ef3d5d | 912 | .namespace = rx_queue_namespace |
0a9627f2 TH |
913 | }; |
914 | ||
6b53dafe | 915 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 916 | { |
6b53dafe | 917 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
918 | struct kobject *kobj = &queue->kobj; |
919 | int error = 0; | |
920 | ||
6b53dafe | 921 | kobj->kset = dev->queues_kset; |
0a9627f2 | 922 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
6648c65e | 923 | "rx-%u", index); |
a953be53 | 924 | if (error) |
d0d66837 | 925 | return error; |
a953be53 | 926 | |
6b53dafe WC |
927 | if (dev->sysfs_rx_queue_group) { |
928 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
d0d66837 | 929 | if (error) { |
930 | kobject_put(kobj); | |
931 | return error; | |
932 | } | |
0a9627f2 TH |
933 | } |
934 | ||
935 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 936 | dev_hold(queue->dev); |
0a9627f2 TH |
937 | |
938 | return error; | |
939 | } | |
80dd6eac | 940 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 941 | |
62fe0b40 | 942 | int |
6b53dafe | 943 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 944 | { |
a953be53 | 945 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
946 | int i; |
947 | int error = 0; | |
948 | ||
a953be53 | 949 | #ifndef CONFIG_RPS |
6b53dafe | 950 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
951 | return 0; |
952 | #endif | |
62fe0b40 | 953 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 954 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
955 | if (error) { |
956 | new_num = old_num; | |
0a9627f2 | 957 | break; |
62fe0b40 | 958 | } |
0a9627f2 TH |
959 | } |
960 | ||
a953be53 | 961 | while (--i >= new_num) { |
002d8a1a AV |
962 | struct kobject *kobj = &dev->_rx[i].kobj; |
963 | ||
273c28bc | 964 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 965 | kobj->uevent_suppress = 1; |
6b53dafe | 966 | if (dev->sysfs_rx_queue_group) |
002d8a1a AV |
967 | sysfs_remove_group(kobj, dev->sysfs_rx_queue_group); |
968 | kobject_put(kobj); | |
a953be53 | 969 | } |
0a9627f2 TH |
970 | |
971 | return error; | |
bf264145 TH |
972 | #else |
973 | return 0; | |
974 | #endif | |
0a9627f2 TH |
975 | } |
976 | ||
ccf5ff69 | 977 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
978 | /* |
979 | * netdev_queue sysfs structures and functions. | |
980 | */ | |
981 | struct netdev_queue_attribute { | |
982 | struct attribute attr; | |
718ad681 | 983 | ssize_t (*show)(struct netdev_queue *queue, char *buf); |
1d24eb48 | 984 | ssize_t (*store)(struct netdev_queue *queue, |
718ad681 | 985 | const char *buf, size_t len); |
1d24eb48 | 986 | }; |
6648c65e | 987 | #define to_netdev_queue_attr(_attr) \ |
988 | container_of(_attr, struct netdev_queue_attribute, attr) | |
1d24eb48 TH |
989 | |
990 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
991 | ||
992 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
993 | struct attribute *attr, char *buf) | |
994 | { | |
667e427b | 995 | const struct netdev_queue_attribute *attribute |
996 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
997 | struct netdev_queue *queue = to_netdev_queue(kobj); |
998 | ||
999 | if (!attribute->show) | |
1000 | return -EIO; | |
1001 | ||
718ad681 | 1002 | return attribute->show(queue, buf); |
1d24eb48 TH |
1003 | } |
1004 | ||
1005 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
1006 | struct attribute *attr, | |
1007 | const char *buf, size_t count) | |
1008 | { | |
667e427b | 1009 | const struct netdev_queue_attribute *attribute |
1010 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1011 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1012 | ||
1013 | if (!attribute->store) | |
1014 | return -EIO; | |
1015 | ||
718ad681 | 1016 | return attribute->store(queue, buf, count); |
1d24eb48 TH |
1017 | } |
1018 | ||
1019 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
1020 | .show = netdev_queue_attr_show, | |
1021 | .store = netdev_queue_attr_store, | |
1022 | }; | |
1023 | ||
2b9c7581 | 1024 | static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf) |
ccf5ff69 | 1025 | { |
1026 | unsigned long trans_timeout; | |
1027 | ||
1028 | spin_lock_irq(&queue->_xmit_lock); | |
1029 | trans_timeout = queue->trans_timeout; | |
1030 | spin_unlock_irq(&queue->_xmit_lock); | |
1031 | ||
1032 | return sprintf(buf, "%lu", trans_timeout); | |
1033 | } | |
1034 | ||
c4047f53 | 1035 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
822b3b2e JF |
1036 | { |
1037 | struct net_device *dev = queue->dev; | |
c4047f53 | 1038 | unsigned int i; |
822b3b2e | 1039 | |
c4047f53 | 1040 | i = queue - dev->_tx; |
822b3b2e JF |
1041 | BUG_ON(i >= dev->num_tx_queues); |
1042 | ||
1043 | return i; | |
1044 | } | |
1045 | ||
2b9c7581 | 1046 | static ssize_t traffic_class_show(struct netdev_queue *queue, |
8d059b0f AD |
1047 | char *buf) |
1048 | { | |
1049 | struct net_device *dev = queue->dev; | |
1050 | int index = get_netdev_queue_index(queue); | |
1051 | int tc = netdev_txq_to_tc(dev, index); | |
1052 | ||
1053 | if (tc < 0) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | return sprintf(buf, "%u\n", tc); | |
1057 | } | |
1058 | ||
1059 | #ifdef CONFIG_XPS | |
2b9c7581 | 1060 | static ssize_t tx_maxrate_show(struct netdev_queue *queue, |
822b3b2e JF |
1061 | char *buf) |
1062 | { | |
1063 | return sprintf(buf, "%lu\n", queue->tx_maxrate); | |
1064 | } | |
1065 | ||
2b9c7581 | 1066 | static ssize_t tx_maxrate_store(struct netdev_queue *queue, |
1067 | const char *buf, size_t len) | |
822b3b2e JF |
1068 | { |
1069 | struct net_device *dev = queue->dev; | |
1070 | int err, index = get_netdev_queue_index(queue); | |
1071 | u32 rate = 0; | |
1072 | ||
1073 | err = kstrtou32(buf, 10, &rate); | |
1074 | if (err < 0) | |
1075 | return err; | |
1076 | ||
1077 | if (!rtnl_trylock()) | |
1078 | return restart_syscall(); | |
1079 | ||
1080 | err = -EOPNOTSUPP; | |
1081 | if (dev->netdev_ops->ndo_set_tx_maxrate) | |
1082 | err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); | |
1083 | ||
1084 | rtnl_unlock(); | |
1085 | if (!err) { | |
1086 | queue->tx_maxrate = rate; | |
1087 | return len; | |
1088 | } | |
1089 | return err; | |
1090 | } | |
1091 | ||
2b9c7581 | 1092 | static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init |
1093 | = __ATTR_RW(tx_maxrate); | |
822b3b2e JF |
1094 | #endif |
1095 | ||
2b9c7581 | 1096 | static struct netdev_queue_attribute queue_trans_timeout __ro_after_init |
1097 | = __ATTR_RO(tx_timeout); | |
ccf5ff69 | 1098 | |
2b9c7581 | 1099 | static struct netdev_queue_attribute queue_traffic_class __ro_after_init |
1100 | = __ATTR_RO(traffic_class); | |
8d059b0f | 1101 | |
114cf580 TH |
1102 | #ifdef CONFIG_BQL |
1103 | /* | |
1104 | * Byte queue limits sysfs structures and functions. | |
1105 | */ | |
1106 | static ssize_t bql_show(char *buf, unsigned int value) | |
1107 | { | |
1108 | return sprintf(buf, "%u\n", value); | |
1109 | } | |
1110 | ||
1111 | static ssize_t bql_set(const char *buf, const size_t count, | |
1112 | unsigned int *pvalue) | |
1113 | { | |
1114 | unsigned int value; | |
1115 | int err; | |
1116 | ||
6648c65e | 1117 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) { |
114cf580 | 1118 | value = DQL_MAX_LIMIT; |
6648c65e | 1119 | } else { |
114cf580 TH |
1120 | err = kstrtouint(buf, 10, &value); |
1121 | if (err < 0) | |
1122 | return err; | |
1123 | if (value > DQL_MAX_LIMIT) | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | ||
1127 | *pvalue = value; | |
1128 | ||
1129 | return count; | |
1130 | } | |
1131 | ||
1132 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1133 | char *buf) |
1134 | { | |
1135 | struct dql *dql = &queue->dql; | |
1136 | ||
1137 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
1138 | } | |
1139 | ||
1140 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1141 | const char *buf, size_t len) |
1142 | { | |
1143 | struct dql *dql = &queue->dql; | |
95c96174 | 1144 | unsigned int value; |
114cf580 TH |
1145 | int err; |
1146 | ||
1147 | err = kstrtouint(buf, 10, &value); | |
1148 | if (err < 0) | |
1149 | return err; | |
1150 | ||
1151 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1152 | ||
1153 | return len; | |
1154 | } | |
1155 | ||
170c658a | 1156 | static struct netdev_queue_attribute bql_hold_time_attribute __ro_after_init |
1157 | = __ATTR(hold_time, S_IRUGO | S_IWUSR, | |
1158 | bql_show_hold_time, bql_set_hold_time); | |
114cf580 TH |
1159 | |
1160 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
114cf580 TH |
1161 | char *buf) |
1162 | { | |
1163 | struct dql *dql = &queue->dql; | |
1164 | ||
1165 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
1166 | } | |
1167 | ||
170c658a | 1168 | static struct netdev_queue_attribute bql_inflight_attribute __ro_after_init = |
795d9a25 | 1169 | __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); |
114cf580 TH |
1170 | |
1171 | #define BQL_ATTR(NAME, FIELD) \ | |
1172 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1173 | char *buf) \ |
1174 | { \ | |
1175 | return bql_show(buf, queue->dql.FIELD); \ | |
1176 | } \ | |
1177 | \ | |
1178 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1179 | const char *buf, size_t len) \ |
1180 | { \ | |
1181 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1182 | } \ | |
1183 | \ | |
170c658a | 1184 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute __ro_after_init \ |
1185 | = __ATTR(NAME, S_IRUGO | S_IWUSR, \ | |
1186 | bql_show_ ## NAME, bql_set_ ## NAME) | |
114cf580 | 1187 | |
170c658a | 1188 | BQL_ATTR(limit, limit); |
1189 | BQL_ATTR(limit_max, max_limit); | |
1190 | BQL_ATTR(limit_min, min_limit); | |
114cf580 | 1191 | |
170c658a | 1192 | static struct attribute *dql_attrs[] __ro_after_init = { |
114cf580 TH |
1193 | &bql_limit_attribute.attr, |
1194 | &bql_limit_max_attribute.attr, | |
1195 | &bql_limit_min_attribute.attr, | |
1196 | &bql_hold_time_attribute.attr, | |
1197 | &bql_inflight_attribute.attr, | |
1198 | NULL | |
1199 | }; | |
1200 | ||
38ef00cc | 1201 | static const struct attribute_group dql_group = { |
114cf580 TH |
1202 | .name = "byte_queue_limits", |
1203 | .attrs = dql_attrs, | |
1204 | }; | |
1205 | #endif /* CONFIG_BQL */ | |
1206 | ||
ccf5ff69 | 1207 | #ifdef CONFIG_XPS |
2b9c7581 | 1208 | static ssize_t xps_cpus_show(struct netdev_queue *queue, |
1209 | char *buf) | |
1d24eb48 TH |
1210 | { |
1211 | struct net_device *dev = queue->dev; | |
184c449f | 1212 | int cpu, len, num_tc = 1, tc = 0; |
1d24eb48 TH |
1213 | struct xps_dev_maps *dev_maps; |
1214 | cpumask_var_t mask; | |
1215 | unsigned long index; | |
1d24eb48 TH |
1216 | |
1217 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
1218 | return -ENOMEM; | |
1219 | ||
1220 | index = get_netdev_queue_index(queue); | |
1221 | ||
184c449f AD |
1222 | if (dev->num_tc) { |
1223 | num_tc = dev->num_tc; | |
1224 | tc = netdev_txq_to_tc(dev, index); | |
1225 | if (tc < 0) | |
1226 | return -EINVAL; | |
1227 | } | |
1228 | ||
1d24eb48 TH |
1229 | rcu_read_lock(); |
1230 | dev_maps = rcu_dereference(dev->xps_maps); | |
1231 | if (dev_maps) { | |
184c449f AD |
1232 | for_each_possible_cpu(cpu) { |
1233 | int i, tci = cpu * num_tc + tc; | |
1234 | struct xps_map *map; | |
1235 | ||
1236 | map = rcu_dereference(dev_maps->cpu_map[tci]); | |
1237 | if (!map) | |
1238 | continue; | |
1239 | ||
1240 | for (i = map->len; i--;) { | |
1241 | if (map->queues[i] == index) { | |
1242 | cpumask_set_cpu(cpu, mask); | |
1243 | break; | |
1d24eb48 TH |
1244 | } |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | rcu_read_unlock(); | |
1249 | ||
f0906827 | 1250 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
1d24eb48 | 1251 | free_cpumask_var(mask); |
f0906827 | 1252 | return len < PAGE_SIZE ? len : -EINVAL; |
1d24eb48 TH |
1253 | } |
1254 | ||
2b9c7581 | 1255 | static ssize_t xps_cpus_store(struct netdev_queue *queue, |
1256 | const char *buf, size_t len) | |
1d24eb48 TH |
1257 | { |
1258 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1259 | unsigned long index; |
537c00de AD |
1260 | cpumask_var_t mask; |
1261 | int err; | |
1d24eb48 TH |
1262 | |
1263 | if (!capable(CAP_NET_ADMIN)) | |
1264 | return -EPERM; | |
1265 | ||
1266 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1267 | return -ENOMEM; | |
1268 | ||
1269 | index = get_netdev_queue_index(queue); | |
1270 | ||
1271 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1272 | if (err) { | |
1273 | free_cpumask_var(mask); | |
1274 | return err; | |
1275 | } | |
1276 | ||
537c00de | 1277 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1278 | |
1279 | free_cpumask_var(mask); | |
1d24eb48 | 1280 | |
537c00de | 1281 | return err ? : len; |
1d24eb48 TH |
1282 | } |
1283 | ||
2b9c7581 | 1284 | static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init |
1285 | = __ATTR_RW(xps_cpus); | |
ccf5ff69 | 1286 | #endif /* CONFIG_XPS */ |
1d24eb48 | 1287 | |
2b9c7581 | 1288 | static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { |
ccf5ff69 | 1289 | &queue_trans_timeout.attr, |
8d059b0f | 1290 | &queue_traffic_class.attr, |
ccf5ff69 | 1291 | #ifdef CONFIG_XPS |
1d24eb48 | 1292 | &xps_cpus_attribute.attr, |
822b3b2e | 1293 | &queue_tx_maxrate.attr, |
ccf5ff69 | 1294 | #endif |
1d24eb48 TH |
1295 | NULL |
1296 | }; | |
1297 | ||
1298 | static void netdev_queue_release(struct kobject *kobj) | |
1299 | { | |
1300 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1301 | |
1d24eb48 TH |
1302 | memset(kobj, 0, sizeof(*kobj)); |
1303 | dev_put(queue->dev); | |
1304 | } | |
1305 | ||
82ef3d5d WC |
1306 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1307 | { | |
1308 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1309 | struct device *dev = &queue->dev->dev; | |
1310 | const void *ns = NULL; | |
1311 | ||
1312 | if (dev->class && dev->class->ns_type) | |
1313 | ns = dev->class->namespace(dev); | |
1314 | ||
1315 | return ns; | |
1316 | } | |
1317 | ||
2b9c7581 | 1318 | static struct kobj_type netdev_queue_ktype __ro_after_init = { |
1d24eb48 TH |
1319 | .sysfs_ops = &netdev_queue_sysfs_ops, |
1320 | .release = netdev_queue_release, | |
1321 | .default_attrs = netdev_queue_default_attrs, | |
82ef3d5d | 1322 | .namespace = netdev_queue_namespace, |
1d24eb48 TH |
1323 | }; |
1324 | ||
6b53dafe | 1325 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1326 | { |
6b53dafe | 1327 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1328 | struct kobject *kobj = &queue->kobj; |
1329 | int error = 0; | |
1330 | ||
6b53dafe | 1331 | kobj->kset = dev->queues_kset; |
1d24eb48 | 1332 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
6648c65e | 1333 | "tx-%u", index); |
114cf580 | 1334 | if (error) |
d0d66837 | 1335 | return error; |
114cf580 TH |
1336 | |
1337 | #ifdef CONFIG_BQL | |
1338 | error = sysfs_create_group(kobj, &dql_group); | |
d0d66837 | 1339 | if (error) { |
1340 | kobject_put(kobj); | |
1341 | return error; | |
1342 | } | |
114cf580 | 1343 | #endif |
1d24eb48 TH |
1344 | |
1345 | kobject_uevent(kobj, KOBJ_ADD); | |
1346 | dev_hold(queue->dev); | |
1347 | ||
114cf580 | 1348 | return 0; |
1d24eb48 | 1349 | } |
ccf5ff69 | 1350 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1351 | |
1352 | int | |
6b53dafe | 1353 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1354 | { |
ccf5ff69 | 1355 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1356 | int i; |
1357 | int error = 0; | |
1358 | ||
1359 | for (i = old_num; i < new_num; i++) { | |
6b53dafe | 1360 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1361 | if (error) { |
1362 | new_num = old_num; | |
1363 | break; | |
1364 | } | |
1365 | } | |
1366 | ||
114cf580 | 1367 | while (--i >= new_num) { |
6b53dafe | 1368 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 | 1369 | |
273c28bc | 1370 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 1371 | queue->kobj.uevent_suppress = 1; |
114cf580 TH |
1372 | #ifdef CONFIG_BQL |
1373 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1374 | #endif | |
1375 | kobject_put(&queue->kobj); | |
1376 | } | |
1d24eb48 TH |
1377 | |
1378 | return error; | |
bf264145 TH |
1379 | #else |
1380 | return 0; | |
ccf5ff69 | 1381 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1382 | } |
1383 | ||
6b53dafe | 1384 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1385 | { |
bf264145 | 1386 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1387 | |
ccf5ff69 | 1388 | #ifdef CONFIG_SYSFS |
6b53dafe | 1389 | dev->queues_kset = kset_create_and_add("queues", |
6648c65e | 1390 | NULL, &dev->dev.kobj); |
6b53dafe | 1391 | if (!dev->queues_kset) |
62fe0b40 | 1392 | return -ENOMEM; |
6b53dafe | 1393 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1394 | #endif |
6b53dafe | 1395 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1396 | |
6b53dafe | 1397 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1398 | if (error) |
1399 | goto error; | |
bf264145 | 1400 | rxq = real_rx; |
1d24eb48 | 1401 | |
6b53dafe | 1402 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1403 | if (error) |
1404 | goto error; | |
bf264145 | 1405 | txq = real_tx; |
1d24eb48 TH |
1406 | |
1407 | return 0; | |
1408 | ||
1409 | error: | |
6b53dafe WC |
1410 | netdev_queue_update_kobjects(dev, txq, 0); |
1411 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
1d24eb48 | 1412 | return error; |
62fe0b40 | 1413 | } |
0a9627f2 | 1414 | |
6b53dafe | 1415 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1416 | { |
bf264145 TH |
1417 | int real_rx = 0, real_tx = 0; |
1418 | ||
a953be53 | 1419 | #ifdef CONFIG_SYSFS |
6b53dafe | 1420 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1421 | #endif |
6b53dafe | 1422 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1423 | |
6b53dafe WC |
1424 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1425 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
ccf5ff69 | 1426 | #ifdef CONFIG_SYSFS |
6b53dafe | 1427 | kset_unregister(dev->queues_kset); |
bf264145 | 1428 | #endif |
0a9627f2 | 1429 | } |
608b4b95 | 1430 | |
7dc5dbc8 EB |
1431 | static bool net_current_may_mount(void) |
1432 | { | |
1433 | struct net *net = current->nsproxy->net_ns; | |
1434 | ||
1435 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1436 | } | |
1437 | ||
a685e089 | 1438 | static void *net_grab_current_ns(void) |
608b4b95 | 1439 | { |
a685e089 AV |
1440 | struct net *ns = current->nsproxy->net_ns; |
1441 | #ifdef CONFIG_NET_NS | |
1442 | if (ns) | |
c122e14d | 1443 | refcount_inc(&ns->passive); |
a685e089 AV |
1444 | #endif |
1445 | return ns; | |
608b4b95 EB |
1446 | } |
1447 | ||
1448 | static const void *net_initial_ns(void) | |
1449 | { | |
1450 | return &init_net; | |
1451 | } | |
1452 | ||
1453 | static const void *net_netlink_ns(struct sock *sk) | |
1454 | { | |
1455 | return sock_net(sk); | |
1456 | } | |
1457 | ||
737aec57 | 1458 | const struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1459 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1460 | .current_may_mount = net_current_may_mount, |
a685e089 | 1461 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1462 | .netlink_ns = net_netlink_ns, |
1463 | .initial_ns = net_initial_ns, | |
a685e089 | 1464 | .drop_ns = net_drop_ns, |
608b4b95 | 1465 | }; |
04600794 | 1466 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1467 | |
7eff2e7a | 1468 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1469 | { |
43cb76d9 | 1470 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1471 | int retval; |
1da177e4 | 1472 | |
312c004d | 1473 | /* pass interface to uevent. */ |
7eff2e7a | 1474 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1475 | if (retval) |
1476 | goto exit; | |
ca2f37db JT |
1477 | |
1478 | /* pass ifindex to uevent. | |
1479 | * ifindex is useful as it won't change (interface name may change) | |
6648c65e | 1480 | * and is what RtNetlink uses natively. |
1481 | */ | |
7eff2e7a | 1482 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1483 | |
bf62456e | 1484 | exit: |
bf62456e | 1485 | return retval; |
1da177e4 | 1486 | } |
1da177e4 LT |
1487 | |
1488 | /* | |
4ec93edb | 1489 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1490 | * Called when last reference to device kobject is gone. |
1da177e4 | 1491 | */ |
43cb76d9 | 1492 | static void netdev_release(struct device *d) |
1da177e4 | 1493 | { |
43cb76d9 | 1494 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1495 | |
1496 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1497 | ||
6c557001 FW |
1498 | /* no need to wait for rcu grace period: |
1499 | * device is dead and about to be freed. | |
1500 | */ | |
1501 | kfree(rcu_access_pointer(dev->ifalias)); | |
74d332c1 | 1502 | netdev_freemem(dev); |
1da177e4 LT |
1503 | } |
1504 | ||
608b4b95 EB |
1505 | static const void *net_namespace(struct device *d) |
1506 | { | |
5c29482d GT |
1507 | struct net_device *dev = to_net_dev(d); |
1508 | ||
608b4b95 EB |
1509 | return dev_net(dev); |
1510 | } | |
1511 | ||
e6d473e6 | 1512 | static struct class net_class __ro_after_init = { |
1da177e4 | 1513 | .name = "net", |
43cb76d9 | 1514 | .dev_release = netdev_release, |
6be8aeef | 1515 | .dev_groups = net_class_groups, |
43cb76d9 | 1516 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1517 | .ns_type = &net_ns_type_operations, |
1518 | .namespace = net_namespace, | |
1da177e4 LT |
1519 | }; |
1520 | ||
aa836df9 FF |
1521 | #ifdef CONFIG_OF_NET |
1522 | static int of_dev_node_match(struct device *dev, const void *data) | |
1523 | { | |
1524 | int ret = 0; | |
1525 | ||
1526 | if (dev->parent) | |
1527 | ret = dev->parent->of_node == data; | |
1528 | ||
1529 | return ret == 0 ? dev->of_node == data : ret; | |
1530 | } | |
1531 | ||
9861f720 RK |
1532 | /* |
1533 | * of_find_net_device_by_node - lookup the net device for the device node | |
1534 | * @np: OF device node | |
1535 | * | |
1536 | * Looks up the net_device structure corresponding with the device node. | |
1537 | * If successful, returns a pointer to the net_device with the embedded | |
1538 | * struct device refcount incremented by one, or NULL on failure. The | |
1539 | * refcount must be dropped when done with the net_device. | |
1540 | */ | |
aa836df9 FF |
1541 | struct net_device *of_find_net_device_by_node(struct device_node *np) |
1542 | { | |
1543 | struct device *dev; | |
1544 | ||
1545 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1546 | if (!dev) | |
1547 | return NULL; | |
1548 | ||
1549 | return to_net_dev(dev); | |
1550 | } | |
1551 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1552 | #endif | |
1553 | ||
9093bbb2 SH |
1554 | /* Delete sysfs entries but hold kobject reference until after all |
1555 | * netdev references are gone. | |
1556 | */ | |
6b53dafe | 1557 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1558 | { |
6648c65e | 1559 | struct device *dev = &ndev->dev; |
9093bbb2 | 1560 | |
273c28bc | 1561 | if (!refcount_read(&dev_net(ndev)->count)) |
002d8a1a AV |
1562 | dev_set_uevent_suppress(dev, 1); |
1563 | ||
9093bbb2 | 1564 | kobject_get(&dev->kobj); |
3891845e | 1565 | |
6b53dafe | 1566 | remove_queue_kobjects(ndev); |
0a9627f2 | 1567 | |
9802c8e2 ML |
1568 | pm_runtime_set_memalloc_noio(dev, false); |
1569 | ||
9093bbb2 | 1570 | device_del(dev); |
1da177e4 LT |
1571 | } |
1572 | ||
1573 | /* Create sysfs entries for network device. */ | |
6b53dafe | 1574 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 1575 | { |
6648c65e | 1576 | struct device *dev = &ndev->dev; |
6b53dafe | 1577 | const struct attribute_group **groups = ndev->sysfs_groups; |
0a9627f2 | 1578 | int error = 0; |
1da177e4 | 1579 | |
a1b3f594 | 1580 | device_initialize(dev); |
43cb76d9 | 1581 | dev->class = &net_class; |
6b53dafe | 1582 | dev->platform_data = ndev; |
43cb76d9 | 1583 | dev->groups = groups; |
1da177e4 | 1584 | |
6b53dafe | 1585 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 1586 | |
8b41d188 | 1587 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1588 | /* Allow for a device specific group */ |
1589 | if (*groups) | |
1590 | groups++; | |
1da177e4 | 1591 | |
0c509a6c | 1592 | *groups++ = &netstat_group; |
38c1a01c JB |
1593 | |
1594 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
6b53dafe | 1595 | if (ndev->ieee80211_ptr) |
38c1a01c JB |
1596 | *groups++ = &wireless_group; |
1597 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
6b53dafe | 1598 | else if (ndev->wireless_handlers) |
38c1a01c JB |
1599 | *groups++ = &wireless_group; |
1600 | #endif | |
1601 | #endif | |
8b41d188 | 1602 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1603 | |
0a9627f2 TH |
1604 | error = device_add(dev); |
1605 | if (error) | |
1606 | return error; | |
1607 | ||
6b53dafe | 1608 | error = register_queue_kobjects(ndev); |
0a9627f2 TH |
1609 | if (error) { |
1610 | device_del(dev); | |
1611 | return error; | |
1612 | } | |
1613 | ||
9802c8e2 ML |
1614 | pm_runtime_set_memalloc_noio(dev, true); |
1615 | ||
0a9627f2 | 1616 | return error; |
1da177e4 LT |
1617 | } |
1618 | ||
b793dc5c | 1619 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1620 | const void *ns) |
b8a9787e | 1621 | { |
58292cbe | 1622 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1623 | } |
58292cbe | 1624 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1625 | |
b793dc5c | 1626 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1627 | const void *ns) |
b8a9787e | 1628 | { |
58292cbe | 1629 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1630 | } |
58292cbe | 1631 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1632 | |
a48d4bb0 | 1633 | int __init netdev_kobject_init(void) |
1da177e4 | 1634 | { |
608b4b95 | 1635 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1636 | return class_register(&net_class); |
1637 | } |