Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * net-sysfs.c - network device class and attributes | |
4 | * | |
5 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
1da177e4 LT |
6 | */ |
7 | ||
4fc268d2 | 8 | #include <linux/capability.h> |
1da177e4 LT |
9 | #include <linux/kernel.h> |
10 | #include <linux/netdevice.h> | |
11 | #include <linux/if_arp.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
174cd4b1 | 13 | #include <linux/sched/signal.h> |
07bbecb3 | 14 | #include <linux/sched/isolation.h> |
608b4b95 | 15 | #include <linux/nsproxy.h> |
1da177e4 | 16 | #include <net/sock.h> |
608b4b95 | 17 | #include <net/net_namespace.h> |
1da177e4 | 18 | #include <linux/rtnetlink.h> |
fec5e652 | 19 | #include <linux/vmalloc.h> |
bc3b2d7f | 20 | #include <linux/export.h> |
114cf580 | 21 | #include <linux/jiffies.h> |
9802c8e2 | 22 | #include <linux/pm_runtime.h> |
aa836df9 | 23 | #include <linux/of.h> |
88832a22 | 24 | #include <linux/of_net.h> |
4d99f660 | 25 | #include <linux/cpu.h> |
1da177e4 | 26 | |
6264f58c | 27 | #include "dev.h" |
342709ef PE |
28 | #include "net-sysfs.h" |
29 | ||
8b41d188 | 30 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
31 | static const char fmt_hex[] = "%#x\n"; |
32 | static const char fmt_dec[] = "%d\n"; | |
33 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 34 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 35 | |
4ec93edb | 36 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 37 | { |
fe9925b5 | 38 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
39 | } |
40 | ||
41 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
42 | static ssize_t netdev_show(const struct device *dev, |
43 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
44 | ssize_t (*format)(const struct net_device *, char *)) |
45 | { | |
6b53dafe | 46 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
47 | ssize_t ret = -EINVAL; |
48 | ||
49 | read_lock(&dev_base_lock); | |
6b53dafe WC |
50 | if (dev_isalive(ndev)) |
51 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
52 | read_unlock(&dev_base_lock); |
53 | ||
54 | return ret; | |
55 | } | |
56 | ||
57 | /* generate a show function for simple field */ | |
58 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 59 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 60 | { \ |
6b53dafe | 61 | return sprintf(buf, format_string, dev->field); \ |
1da177e4 | 62 | } \ |
6be8aeef | 63 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 64 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 65 | { \ |
43cb76d9 | 66 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
67 | } \ |
68 | ||
69 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
70 | NETDEVICE_SHOW(field, format_string); \ | |
71 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 72 | |
6be8aeef GKH |
73 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
74 | NETDEVICE_SHOW(field, format_string); \ | |
75 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
76 | |
77 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 78 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
79 | const char *buf, size_t len, |
80 | int (*set)(struct net_device *, unsigned long)) | |
81 | { | |
5e1fccc0 EB |
82 | struct net_device *netdev = to_net_dev(dev); |
83 | struct net *net = dev_net(netdev); | |
1da177e4 | 84 | unsigned long new; |
5f0224a6 | 85 | int ret; |
1da177e4 | 86 | |
5e1fccc0 | 87 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
88 | return -EPERM; |
89 | ||
e1e420c7 SK |
90 | ret = kstrtoul(buf, 0, &new); |
91 | if (ret) | |
1da177e4 LT |
92 | goto err; |
93 | ||
5a5990d3 | 94 | if (!rtnl_trylock()) |
336ca57c | 95 | return restart_syscall(); |
5a5990d3 | 96 | |
5e1fccc0 | 97 | if (dev_isalive(netdev)) { |
6648c65e | 98 | ret = (*set)(netdev, new); |
99 | if (ret == 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 | 161 | struct net_device *ndev = to_net_dev(dev); |
6648c65e | 162 | |
6b53dafe WC |
163 | if (dev_isalive(ndev)) |
164 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
165 | return -EINVAL; |
166 | } | |
6be8aeef | 167 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 168 | |
6b53dafe | 169 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 170 | { |
6b53dafe | 171 | if (!netif_running(dev)) |
fdae0fde | 172 | return -EINVAL; |
6648c65e | 173 | return dev_change_carrier(dev, (bool)new_carrier); |
fdae0fde JP |
174 | } |
175 | ||
6be8aeef GKH |
176 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
177 | const char *buf, size_t len) | |
fdae0fde | 178 | { |
146e5e73 AT |
179 | struct net_device *netdev = to_net_dev(dev); |
180 | ||
181 | /* The check is also done in change_carrier; this helps returning early | |
182 | * without hitting the trylock/restart in netdev_store. | |
183 | */ | |
184 | if (!netdev->netdev_ops->ndo_change_carrier) | |
185 | return -EOPNOTSUPP; | |
186 | ||
fdae0fde JP |
187 | return netdev_store(dev, attr, buf, len, change_carrier); |
188 | } | |
189 | ||
6be8aeef | 190 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 191 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
192 | { |
193 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 194 | |
195 | if (netif_running(netdev)) | |
1da177e4 | 196 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
6648c65e | 197 | |
1da177e4 LT |
198 | return -EINVAL; |
199 | } | |
6be8aeef | 200 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 201 | |
6be8aeef | 202 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
203 | struct device_attribute *attr, char *buf) |
204 | { | |
205 | struct net_device *netdev = to_net_dev(dev); | |
206 | int ret = -EINVAL; | |
207 | ||
146e5e73 AT |
208 | /* The check is also done in __ethtool_get_link_ksettings; this helps |
209 | * returning early without hitting the trylock/restart below. | |
210 | */ | |
211 | if (!netdev->ethtool_ops->get_link_ksettings) | |
212 | return ret; | |
213 | ||
d519e17e AG |
214 | if (!rtnl_trylock()) |
215 | return restart_syscall(); | |
216 | ||
4224cfd7 | 217 | if (netif_running(netdev) && netif_device_present(netdev)) { |
7cad1bac DD |
218 | struct ethtool_link_ksettings cmd; |
219 | ||
220 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) | |
221 | ret = sprintf(buf, fmt_dec, cmd.base.speed); | |
d519e17e AG |
222 | } |
223 | rtnl_unlock(); | |
224 | return ret; | |
225 | } | |
6be8aeef | 226 | static DEVICE_ATTR_RO(speed); |
d519e17e | 227 | |
6be8aeef | 228 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
229 | struct device_attribute *attr, char *buf) |
230 | { | |
231 | struct net_device *netdev = to_net_dev(dev); | |
232 | int ret = -EINVAL; | |
233 | ||
146e5e73 AT |
234 | /* The check is also done in __ethtool_get_link_ksettings; this helps |
235 | * returning early without hitting the trylock/restart below. | |
236 | */ | |
237 | if (!netdev->ethtool_ops->get_link_ksettings) | |
238 | return ret; | |
239 | ||
d519e17e AG |
240 | if (!rtnl_trylock()) |
241 | return restart_syscall(); | |
242 | ||
8ae6daca | 243 | if (netif_running(netdev)) { |
7cad1bac DD |
244 | struct ethtool_link_ksettings cmd; |
245 | ||
246 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) { | |
c6c13965 | 247 | const char *duplex; |
7cad1bac DD |
248 | |
249 | switch (cmd.base.duplex) { | |
c6c13965 NA |
250 | case DUPLEX_HALF: |
251 | duplex = "half"; | |
252 | break; | |
253 | case DUPLEX_FULL: | |
254 | duplex = "full"; | |
255 | break; | |
256 | default: | |
257 | duplex = "unknown"; | |
258 | break; | |
259 | } | |
260 | ret = sprintf(buf, "%s\n", duplex); | |
261 | } | |
d519e17e AG |
262 | } |
263 | rtnl_unlock(); | |
264 | return ret; | |
265 | } | |
6be8aeef | 266 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 267 | |
db30a577 AL |
268 | static ssize_t testing_show(struct device *dev, |
269 | struct device_attribute *attr, char *buf) | |
270 | { | |
271 | struct net_device *netdev = to_net_dev(dev); | |
272 | ||
273 | if (netif_running(netdev)) | |
274 | return sprintf(buf, fmt_dec, !!netif_testing(netdev)); | |
275 | ||
276 | return -EINVAL; | |
277 | } | |
278 | static DEVICE_ATTR_RO(testing); | |
279 | ||
6be8aeef | 280 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 281 | struct device_attribute *attr, char *buf) |
b00055aa SR |
282 | { |
283 | struct net_device *netdev = to_net_dev(dev); | |
284 | ||
285 | if (netif_running(netdev)) | |
286 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
287 | ||
288 | return -EINVAL; | |
289 | } | |
6be8aeef | 290 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 291 | |
36cbd3dc | 292 | static const char *const operstates[] = { |
b00055aa SR |
293 | "unknown", |
294 | "notpresent", /* currently unused */ | |
295 | "down", | |
296 | "lowerlayerdown", | |
db30a577 | 297 | "testing", |
b00055aa SR |
298 | "dormant", |
299 | "up" | |
300 | }; | |
301 | ||
6be8aeef | 302 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 303 | struct device_attribute *attr, char *buf) |
b00055aa SR |
304 | { |
305 | const struct net_device *netdev = to_net_dev(dev); | |
306 | unsigned char operstate; | |
307 | ||
308 | read_lock(&dev_base_lock); | |
309 | operstate = netdev->operstate; | |
310 | if (!netif_running(netdev)) | |
311 | operstate = IF_OPER_DOWN; | |
312 | read_unlock(&dev_base_lock); | |
313 | ||
e3a5cd9e | 314 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
315 | return -EINVAL; /* should not happen */ |
316 | ||
317 | return sprintf(buf, "%s\n", operstates[operstate]); | |
318 | } | |
6be8aeef | 319 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 320 | |
2d3b479d | 321 | static ssize_t carrier_changes_show(struct device *dev, |
322 | struct device_attribute *attr, | |
323 | char *buf) | |
324 | { | |
325 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 326 | |
2d3b479d | 327 | return sprintf(buf, fmt_dec, |
b2d3bcfa DD |
328 | atomic_read(&netdev->carrier_up_count) + |
329 | atomic_read(&netdev->carrier_down_count)); | |
2d3b479d | 330 | } |
331 | static DEVICE_ATTR_RO(carrier_changes); | |
332 | ||
b2d3bcfa DD |
333 | static ssize_t carrier_up_count_show(struct device *dev, |
334 | struct device_attribute *attr, | |
335 | char *buf) | |
336 | { | |
337 | struct net_device *netdev = to_net_dev(dev); | |
338 | ||
339 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_up_count)); | |
340 | } | |
341 | static DEVICE_ATTR_RO(carrier_up_count); | |
342 | ||
343 | static ssize_t carrier_down_count_show(struct device *dev, | |
344 | struct device_attribute *attr, | |
345 | char *buf) | |
346 | { | |
347 | struct net_device *netdev = to_net_dev(dev); | |
348 | ||
349 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_down_count)); | |
350 | } | |
351 | static DEVICE_ATTR_RO(carrier_down_count); | |
352 | ||
1da177e4 | 353 | /* read-write attributes */ |
1da177e4 | 354 | |
6b53dafe | 355 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 356 | { |
6648c65e | 357 | return dev_set_mtu(dev, (int)new_mtu); |
1da177e4 LT |
358 | } |
359 | ||
6be8aeef | 360 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 361 | const char *buf, size_t len) |
1da177e4 | 362 | { |
43cb76d9 | 363 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 364 | } |
6be8aeef | 365 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 366 | |
6b53dafe | 367 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 368 | { |
567c5e13 | 369 | return dev_change_flags(dev, (unsigned int)new_flags, NULL); |
1da177e4 LT |
370 | } |
371 | ||
6be8aeef | 372 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 373 | const char *buf, size_t len) |
1da177e4 | 374 | { |
43cb76d9 | 375 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 376 | } |
6be8aeef | 377 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 378 | |
6be8aeef | 379 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
380 | struct device_attribute *attr, |
381 | const char *buf, size_t len) | |
1da177e4 | 382 | { |
5e1fccc0 EB |
383 | if (!capable(CAP_NET_ADMIN)) |
384 | return -EPERM; | |
385 | ||
6a643ddb | 386 | return netdev_store(dev, attr, buf, len, dev_change_tx_queue_len); |
1da177e4 | 387 | } |
0cd29503 | 388 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec); |
1da177e4 | 389 | |
3b47d303 ED |
390 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
391 | { | |
7e417a66 | 392 | WRITE_ONCE(dev->gro_flush_timeout, val); |
3b47d303 ED |
393 | return 0; |
394 | } | |
395 | ||
396 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
6648c65e | 397 | struct device_attribute *attr, |
398 | const char *buf, size_t len) | |
3b47d303 ED |
399 | { |
400 | if (!capable(CAP_NET_ADMIN)) | |
401 | return -EPERM; | |
402 | ||
403 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
404 | } | |
405 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
406 | ||
6f8b12d6 ED |
407 | static int change_napi_defer_hard_irqs(struct net_device *dev, unsigned long val) |
408 | { | |
7e417a66 | 409 | WRITE_ONCE(dev->napi_defer_hard_irqs, val); |
6f8b12d6 ED |
410 | return 0; |
411 | } | |
412 | ||
413 | static ssize_t napi_defer_hard_irqs_store(struct device *dev, | |
414 | struct device_attribute *attr, | |
415 | const char *buf, size_t len) | |
416 | { | |
417 | if (!capable(CAP_NET_ADMIN)) | |
418 | return -EPERM; | |
419 | ||
420 | return netdev_store(dev, attr, buf, len, change_napi_defer_hard_irqs); | |
421 | } | |
422 | NETDEVICE_SHOW_RW(napi_defer_hard_irqs, fmt_dec); | |
423 | ||
6be8aeef | 424 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
425 | const char *buf, size_t len) |
426 | { | |
427 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 428 | struct net *net = dev_net(netdev); |
0b815a1a | 429 | size_t count = len; |
c92eb77a | 430 | ssize_t ret = 0; |
0b815a1a | 431 | |
5e1fccc0 | 432 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
433 | return -EPERM; |
434 | ||
435 | /* ignore trailing newline */ | |
436 | if (len > 0 && buf[len - 1] == '\n') | |
437 | --count; | |
438 | ||
c92eb77a RP |
439 | if (!rtnl_trylock()) |
440 | return restart_syscall(); | |
0b815a1a | 441 | |
c92eb77a RP |
442 | if (dev_isalive(netdev)) { |
443 | ret = dev_set_alias(netdev, buf, count); | |
444 | if (ret < 0) | |
445 | goto err; | |
446 | ret = len; | |
447 | netdev_state_change(netdev); | |
448 | } | |
449 | err: | |
450 | rtnl_unlock(); | |
451 | ||
452 | return ret; | |
0b815a1a SH |
453 | } |
454 | ||
6be8aeef | 455 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
456 | struct device_attribute *attr, char *buf) |
457 | { | |
458 | const struct net_device *netdev = to_net_dev(dev); | |
6c557001 | 459 | char tmp[IFALIASZ]; |
0b815a1a SH |
460 | ssize_t ret = 0; |
461 | ||
6c557001 FW |
462 | ret = dev_get_alias(netdev, tmp, sizeof(tmp)); |
463 | if (ret > 0) | |
464 | ret = sprintf(buf, "%s\n", tmp); | |
0b815a1a SH |
465 | return ret; |
466 | } | |
6be8aeef | 467 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 468 | |
6b53dafe | 469 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 470 | { |
6648c65e | 471 | dev_set_group(dev, (int)new_group); |
a512b92b VD |
472 | return 0; |
473 | } | |
474 | ||
6be8aeef GKH |
475 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
476 | const char *buf, size_t len) | |
a512b92b VD |
477 | { |
478 | return netdev_store(dev, attr, buf, len, change_group); | |
479 | } | |
6be8aeef | 480 | NETDEVICE_SHOW(group, fmt_dec); |
d6444062 | 481 | static DEVICE_ATTR(netdev_group, 0644, group_show, group_store); |
6be8aeef | 482 | |
d746d707 AK |
483 | static int change_proto_down(struct net_device *dev, unsigned long proto_down) |
484 | { | |
6648c65e | 485 | return dev_change_proto_down(dev, (bool)proto_down); |
d746d707 AK |
486 | } |
487 | ||
488 | static ssize_t proto_down_store(struct device *dev, | |
489 | struct device_attribute *attr, | |
490 | const char *buf, size_t len) | |
491 | { | |
492 | return netdev_store(dev, attr, buf, len, change_proto_down); | |
493 | } | |
494 | NETDEVICE_SHOW_RW(proto_down, fmt_dec); | |
495 | ||
cc998ff8 | 496 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
497 | struct device_attribute *attr, char *buf) |
498 | { | |
499 | struct net_device *netdev = to_net_dev(dev); | |
500 | ssize_t ret = -EINVAL; | |
501 | ||
146e5e73 AT |
502 | /* The check is also done in dev_get_phys_port_id; this helps returning |
503 | * early without hitting the trylock/restart below. | |
504 | */ | |
505 | if (!netdev->netdev_ops->ndo_get_phys_port_id) | |
506 | return -EOPNOTSUPP; | |
507 | ||
ff80e519 JP |
508 | if (!rtnl_trylock()) |
509 | return restart_syscall(); | |
510 | ||
511 | if (dev_isalive(netdev)) { | |
02637fce | 512 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
513 | |
514 | ret = dev_get_phys_port_id(netdev, &ppid); | |
515 | if (!ret) | |
516 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
517 | } | |
518 | rtnl_unlock(); | |
519 | ||
520 | return ret; | |
521 | } | |
cc998ff8 LT |
522 | static DEVICE_ATTR_RO(phys_port_id); |
523 | ||
db24a904 DA |
524 | static ssize_t phys_port_name_show(struct device *dev, |
525 | struct device_attribute *attr, char *buf) | |
526 | { | |
527 | struct net_device *netdev = to_net_dev(dev); | |
528 | ssize_t ret = -EINVAL; | |
529 | ||
146e5e73 AT |
530 | /* The checks are also done in dev_get_phys_port_name; this helps |
531 | * returning early without hitting the trylock/restart below. | |
532 | */ | |
533 | if (!netdev->netdev_ops->ndo_get_phys_port_name && | |
534 | !netdev->netdev_ops->ndo_get_devlink_port) | |
535 | return -EOPNOTSUPP; | |
536 | ||
db24a904 DA |
537 | if (!rtnl_trylock()) |
538 | return restart_syscall(); | |
539 | ||
540 | if (dev_isalive(netdev)) { | |
541 | char name[IFNAMSIZ]; | |
542 | ||
543 | ret = dev_get_phys_port_name(netdev, name, sizeof(name)); | |
544 | if (!ret) | |
545 | ret = sprintf(buf, "%s\n", name); | |
546 | } | |
547 | rtnl_unlock(); | |
548 | ||
549 | return ret; | |
550 | } | |
551 | static DEVICE_ATTR_RO(phys_port_name); | |
552 | ||
aecbe01e JP |
553 | static ssize_t phys_switch_id_show(struct device *dev, |
554 | struct device_attribute *attr, char *buf) | |
555 | { | |
556 | struct net_device *netdev = to_net_dev(dev); | |
557 | ssize_t ret = -EINVAL; | |
558 | ||
146e5e73 AT |
559 | /* The checks are also done in dev_get_phys_port_name; this helps |
560 | * returning early without hitting the trylock/restart below. This works | |
561 | * because recurse is false when calling dev_get_port_parent_id. | |
562 | */ | |
563 | if (!netdev->netdev_ops->ndo_get_port_parent_id && | |
564 | !netdev->netdev_ops->ndo_get_devlink_port) | |
565 | return -EOPNOTSUPP; | |
566 | ||
aecbe01e JP |
567 | if (!rtnl_trylock()) |
568 | return restart_syscall(); | |
569 | ||
570 | if (dev_isalive(netdev)) { | |
bccb3025 FF |
571 | struct netdev_phys_item_id ppid = { }; |
572 | ||
573 | ret = dev_get_port_parent_id(netdev, &ppid, false); | |
aecbe01e | 574 | if (!ret) |
bccb3025 | 575 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); |
aecbe01e JP |
576 | } |
577 | rtnl_unlock(); | |
578 | ||
579 | return ret; | |
580 | } | |
581 | static DEVICE_ATTR_RO(phys_switch_id); | |
582 | ||
5fdd2f0e WW |
583 | static ssize_t threaded_show(struct device *dev, |
584 | struct device_attribute *attr, char *buf) | |
585 | { | |
586 | struct net_device *netdev = to_net_dev(dev); | |
587 | ssize_t ret = -EINVAL; | |
588 | ||
589 | if (!rtnl_trylock()) | |
590 | return restart_syscall(); | |
591 | ||
592 | if (dev_isalive(netdev)) | |
593 | ret = sprintf(buf, fmt_dec, netdev->threaded); | |
594 | ||
595 | rtnl_unlock(); | |
596 | return ret; | |
597 | } | |
598 | ||
599 | static int modify_napi_threaded(struct net_device *dev, unsigned long val) | |
600 | { | |
601 | int ret; | |
602 | ||
603 | if (list_empty(&dev->napi_list)) | |
604 | return -EOPNOTSUPP; | |
605 | ||
606 | if (val != 0 && val != 1) | |
607 | return -EOPNOTSUPP; | |
608 | ||
609 | ret = dev_set_threaded(dev, val); | |
610 | ||
611 | return ret; | |
612 | } | |
613 | ||
614 | static ssize_t threaded_store(struct device *dev, | |
615 | struct device_attribute *attr, | |
616 | const char *buf, size_t len) | |
617 | { | |
618 | return netdev_store(dev, attr, buf, len, modify_napi_threaded); | |
619 | } | |
620 | static DEVICE_ATTR_RW(threaded); | |
621 | ||
ec6cc599 | 622 | static struct attribute *net_class_attrs[] __ro_after_init = { |
6be8aeef GKH |
623 | &dev_attr_netdev_group.attr, |
624 | &dev_attr_type.attr, | |
625 | &dev_attr_dev_id.attr, | |
3f85944f | 626 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
627 | &dev_attr_iflink.attr, |
628 | &dev_attr_ifindex.attr, | |
685343fc | 629 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
630 | &dev_attr_addr_assign_type.attr, |
631 | &dev_attr_addr_len.attr, | |
632 | &dev_attr_link_mode.attr, | |
633 | &dev_attr_address.attr, | |
634 | &dev_attr_broadcast.attr, | |
635 | &dev_attr_speed.attr, | |
636 | &dev_attr_duplex.attr, | |
637 | &dev_attr_dormant.attr, | |
db30a577 | 638 | &dev_attr_testing.attr, |
6be8aeef | 639 | &dev_attr_operstate.attr, |
2d3b479d | 640 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
641 | &dev_attr_ifalias.attr, |
642 | &dev_attr_carrier.attr, | |
643 | &dev_attr_mtu.attr, | |
644 | &dev_attr_flags.attr, | |
645 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 646 | &dev_attr_gro_flush_timeout.attr, |
6f8b12d6 | 647 | &dev_attr_napi_defer_hard_irqs.attr, |
cc998ff8 | 648 | &dev_attr_phys_port_id.attr, |
db24a904 | 649 | &dev_attr_phys_port_name.attr, |
aecbe01e | 650 | &dev_attr_phys_switch_id.attr, |
d746d707 | 651 | &dev_attr_proto_down.attr, |
b2d3bcfa DD |
652 | &dev_attr_carrier_up_count.attr, |
653 | &dev_attr_carrier_down_count.attr, | |
5fdd2f0e | 654 | &dev_attr_threaded.attr, |
6be8aeef | 655 | NULL, |
1da177e4 | 656 | }; |
6be8aeef | 657 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
658 | |
659 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
660 | static ssize_t netstat_show(const struct device *d, |
661 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
662 | unsigned long offset) |
663 | { | |
43cb76d9 | 664 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
665 | ssize_t ret = -EINVAL; |
666 | ||
be1f3c2c | 667 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
6648c65e | 668 | offset % sizeof(u64) != 0); |
1da177e4 LT |
669 | |
670 | read_lock(&dev_base_lock); | |
96e74088 | 671 | if (dev_isalive(dev)) { |
28172739 ED |
672 | struct rtnl_link_stats64 temp; |
673 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
674 | ||
6648c65e | 675 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *)stats) + offset)); |
96e74088 | 676 | } |
1da177e4 LT |
677 | read_unlock(&dev_base_lock); |
678 | return ret; | |
679 | } | |
680 | ||
681 | /* generate a read-only statistics attribute */ | |
682 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 683 | static ssize_t name##_show(struct device *d, \ |
6648c65e | 684 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 685 | { \ |
43cb76d9 | 686 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 687 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 688 | } \ |
6be8aeef | 689 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
690 | |
691 | NETSTAT_ENTRY(rx_packets); | |
692 | NETSTAT_ENTRY(tx_packets); | |
693 | NETSTAT_ENTRY(rx_bytes); | |
694 | NETSTAT_ENTRY(tx_bytes); | |
695 | NETSTAT_ENTRY(rx_errors); | |
696 | NETSTAT_ENTRY(tx_errors); | |
697 | NETSTAT_ENTRY(rx_dropped); | |
698 | NETSTAT_ENTRY(tx_dropped); | |
699 | NETSTAT_ENTRY(multicast); | |
700 | NETSTAT_ENTRY(collisions); | |
701 | NETSTAT_ENTRY(rx_length_errors); | |
702 | NETSTAT_ENTRY(rx_over_errors); | |
703 | NETSTAT_ENTRY(rx_crc_errors); | |
704 | NETSTAT_ENTRY(rx_frame_errors); | |
705 | NETSTAT_ENTRY(rx_fifo_errors); | |
706 | NETSTAT_ENTRY(rx_missed_errors); | |
707 | NETSTAT_ENTRY(tx_aborted_errors); | |
708 | NETSTAT_ENTRY(tx_carrier_errors); | |
709 | NETSTAT_ENTRY(tx_fifo_errors); | |
710 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
711 | NETSTAT_ENTRY(tx_window_errors); | |
712 | NETSTAT_ENTRY(rx_compressed); | |
713 | NETSTAT_ENTRY(tx_compressed); | |
6e7333d3 | 714 | NETSTAT_ENTRY(rx_nohandler); |
1da177e4 | 715 | |
ec6cc599 | 716 | static struct attribute *netstat_attrs[] __ro_after_init = { |
43cb76d9 GKH |
717 | &dev_attr_rx_packets.attr, |
718 | &dev_attr_tx_packets.attr, | |
719 | &dev_attr_rx_bytes.attr, | |
720 | &dev_attr_tx_bytes.attr, | |
721 | &dev_attr_rx_errors.attr, | |
722 | &dev_attr_tx_errors.attr, | |
723 | &dev_attr_rx_dropped.attr, | |
724 | &dev_attr_tx_dropped.attr, | |
725 | &dev_attr_multicast.attr, | |
726 | &dev_attr_collisions.attr, | |
727 | &dev_attr_rx_length_errors.attr, | |
728 | &dev_attr_rx_over_errors.attr, | |
729 | &dev_attr_rx_crc_errors.attr, | |
730 | &dev_attr_rx_frame_errors.attr, | |
731 | &dev_attr_rx_fifo_errors.attr, | |
732 | &dev_attr_rx_missed_errors.attr, | |
733 | &dev_attr_tx_aborted_errors.attr, | |
734 | &dev_attr_tx_carrier_errors.attr, | |
735 | &dev_attr_tx_fifo_errors.attr, | |
736 | &dev_attr_tx_heartbeat_errors.attr, | |
737 | &dev_attr_tx_window_errors.attr, | |
738 | &dev_attr_rx_compressed.attr, | |
739 | &dev_attr_tx_compressed.attr, | |
6e7333d3 | 740 | &dev_attr_rx_nohandler.attr, |
1da177e4 LT |
741 | NULL |
742 | }; | |
743 | ||
38ef00cc | 744 | static const struct attribute_group netstat_group = { |
1da177e4 LT |
745 | .name = "statistics", |
746 | .attrs = netstat_attrs, | |
747 | }; | |
38c1a01c | 748 | |
38c1a01c JB |
749 | static struct attribute *wireless_attrs[] = { |
750 | NULL | |
751 | }; | |
752 | ||
38ef00cc | 753 | static const struct attribute_group wireless_group = { |
38c1a01c JB |
754 | .name = "wireless", |
755 | .attrs = wireless_attrs, | |
756 | }; | |
c304eddc JK |
757 | |
758 | static bool wireless_group_needed(struct net_device *ndev) | |
759 | { | |
760 | #if IS_ENABLED(CONFIG_CFG80211) | |
761 | if (ndev->ieee80211_ptr) | |
762 | return true; | |
38c1a01c | 763 | #endif |
c304eddc JK |
764 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) |
765 | if (ndev->wireless_handlers) | |
766 | return true; | |
767 | #endif | |
768 | return false; | |
769 | } | |
6be8aeef GKH |
770 | |
771 | #else /* CONFIG_SYSFS */ | |
772 | #define net_class_groups NULL | |
d6523ddf | 773 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 774 | |
a953be53 | 775 | #ifdef CONFIG_SYSFS |
6648c65e | 776 | #define to_rx_queue_attr(_attr) \ |
777 | container_of(_attr, struct rx_queue_attribute, attr) | |
0a9627f2 TH |
778 | |
779 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
780 | ||
781 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
782 | char *buf) | |
783 | { | |
667e427b | 784 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
785 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
786 | ||
787 | if (!attribute->show) | |
788 | return -EIO; | |
789 | ||
718ad681 | 790 | return attribute->show(queue, buf); |
0a9627f2 TH |
791 | } |
792 | ||
793 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
794 | const char *buf, size_t count) | |
795 | { | |
667e427b | 796 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
797 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
798 | ||
799 | if (!attribute->store) | |
800 | return -EIO; | |
801 | ||
718ad681 | 802 | return attribute->store(queue, buf, count); |
0a9627f2 TH |
803 | } |
804 | ||
fa50d645 | 805 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
806 | .show = rx_queue_attr_show, |
807 | .store = rx_queue_attr_store, | |
808 | }; | |
809 | ||
a953be53 | 810 | #ifdef CONFIG_RPS |
718ad681 | 811 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf) |
0a9627f2 TH |
812 | { |
813 | struct rps_map *map; | |
814 | cpumask_var_t mask; | |
f0906827 | 815 | int i, len; |
0a9627f2 TH |
816 | |
817 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
818 | return -ENOMEM; | |
819 | ||
820 | rcu_read_lock(); | |
821 | map = rcu_dereference(queue->rps_map); | |
822 | if (map) | |
823 | for (i = 0; i < map->len; i++) | |
824 | cpumask_set_cpu(map->cpus[i], mask); | |
825 | ||
f0906827 | 826 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 827 | rcu_read_unlock(); |
0a9627f2 | 828 | free_cpumask_var(mask); |
f0906827 TH |
829 | |
830 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
831 | } |
832 | ||
f5acb907 | 833 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
718ad681 | 834 | const char *buf, size_t len) |
0a9627f2 TH |
835 | { |
836 | struct rps_map *old_map, *map; | |
837 | cpumask_var_t mask; | |
c8fb9f22 | 838 | int err, cpu, i; |
da65ad1f | 839 | static DEFINE_MUTEX(rps_map_mutex); |
0a9627f2 TH |
840 | |
841 | if (!capable(CAP_NET_ADMIN)) | |
842 | return -EPERM; | |
843 | ||
844 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
845 | return -ENOMEM; | |
846 | ||
847 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
848 | if (err) { | |
849 | free_cpumask_var(mask); | |
850 | return err; | |
851 | } | |
852 | ||
2e0d8fef | 853 | if (!cpumask_empty(mask)) { |
04d4e665 FW |
854 | cpumask_and(mask, mask, housekeeping_cpumask(HK_TYPE_DOMAIN)); |
855 | cpumask_and(mask, mask, housekeeping_cpumask(HK_TYPE_WQ)); | |
2e0d8fef ED |
856 | if (cpumask_empty(mask)) { |
857 | free_cpumask_var(mask); | |
858 | return -EINVAL; | |
859 | } | |
07bbecb3 AB |
860 | } |
861 | ||
95c96174 | 862 | map = kzalloc(max_t(unsigned int, |
6648c65e | 863 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
864 | GFP_KERNEL); | |
0a9627f2 TH |
865 | if (!map) { |
866 | free_cpumask_var(mask); | |
867 | return -ENOMEM; | |
868 | } | |
869 | ||
870 | i = 0; | |
871 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
872 | map->cpus[i++] = cpu; | |
873 | ||
6648c65e | 874 | if (i) { |
0a9627f2 | 875 | map->len = i; |
6648c65e | 876 | } else { |
0a9627f2 TH |
877 | kfree(map); |
878 | map = NULL; | |
879 | } | |
880 | ||
da65ad1f | 881 | mutex_lock(&rps_map_mutex); |
6e3f7faf | 882 | old_map = rcu_dereference_protected(queue->rps_map, |
da65ad1f | 883 | mutex_is_locked(&rps_map_mutex)); |
0a9627f2 | 884 | rcu_assign_pointer(queue->rps_map, map); |
0a9627f2 | 885 | |
adc9300e | 886 | if (map) |
dc05360f | 887 | static_branch_inc(&rps_needed); |
10e4ea75 | 888 | if (old_map) |
dc05360f | 889 | static_branch_dec(&rps_needed); |
10e4ea75 | 890 | |
da65ad1f | 891 | mutex_unlock(&rps_map_mutex); |
10e4ea75 TH |
892 | |
893 | if (old_map) | |
894 | kfree_rcu(old_map, rcu); | |
895 | ||
0a9627f2 TH |
896 | free_cpumask_var(mask); |
897 | return len; | |
898 | } | |
899 | ||
fec5e652 | 900 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
901 | char *buf) |
902 | { | |
903 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 904 | unsigned long val = 0; |
fec5e652 TH |
905 | |
906 | rcu_read_lock(); | |
907 | flow_table = rcu_dereference(queue->rps_flow_table); | |
908 | if (flow_table) | |
60b778ce | 909 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
910 | rcu_read_unlock(); |
911 | ||
60b778ce | 912 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
913 | } |
914 | ||
fec5e652 TH |
915 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
916 | { | |
917 | struct rps_dev_flow_table *table = container_of(rcu, | |
918 | struct rps_dev_flow_table, rcu); | |
243198d0 | 919 | vfree(table); |
fec5e652 TH |
920 | } |
921 | ||
f5acb907 | 922 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
718ad681 | 923 | const char *buf, size_t len) |
fec5e652 | 924 | { |
60b778ce | 925 | unsigned long mask, count; |
fec5e652 TH |
926 | struct rps_dev_flow_table *table, *old_table; |
927 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 928 | int rc; |
fec5e652 TH |
929 | |
930 | if (!capable(CAP_NET_ADMIN)) | |
931 | return -EPERM; | |
932 | ||
60b778ce ED |
933 | rc = kstrtoul(buf, 0, &count); |
934 | if (rc < 0) | |
935 | return rc; | |
fec5e652 TH |
936 | |
937 | if (count) { | |
60b778ce ED |
938 | mask = count - 1; |
939 | /* mask = roundup_pow_of_two(count) - 1; | |
940 | * without overflows... | |
941 | */ | |
942 | while ((mask | (mask >> 1)) != mask) | |
943 | mask |= (mask >> 1); | |
944 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 945 | * and on 32bit arches, must check |
946 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
947 | */ |
948 | #if BITS_PER_LONG > 32 | |
949 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 950 | return -EINVAL; |
60b778ce ED |
951 | #else |
952 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 953 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
954 | /* Enforce a limit to prevent overflow */ |
955 | return -EINVAL; | |
956 | } | |
60b778ce ED |
957 | #endif |
958 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
959 | if (!table) |
960 | return -ENOMEM; | |
961 | ||
60b778ce ED |
962 | table->mask = mask; |
963 | for (count = 0; count <= mask; count++) | |
964 | table->flows[count].cpu = RPS_NO_CPU; | |
6648c65e | 965 | } else { |
fec5e652 | 966 | table = NULL; |
6648c65e | 967 | } |
fec5e652 TH |
968 | |
969 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
970 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
971 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
972 | rcu_assign_pointer(queue->rps_flow_table, table); |
973 | spin_unlock(&rps_dev_flow_lock); | |
974 | ||
975 | if (old_table) | |
976 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
977 | ||
978 | return len; | |
979 | } | |
980 | ||
667e427b | 981 | static struct rx_queue_attribute rps_cpus_attribute __ro_after_init |
d6444062 | 982 | = __ATTR(rps_cpus, 0644, show_rps_map, store_rps_map); |
0a9627f2 | 983 | |
667e427b | 984 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute __ro_after_init |
d6444062 | 985 | = __ATTR(rps_flow_cnt, 0644, |
667e427b | 986 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); |
a953be53 | 987 | #endif /* CONFIG_RPS */ |
fec5e652 | 988 | |
667e427b | 989 | static struct attribute *rx_queue_default_attrs[] __ro_after_init = { |
a953be53 | 990 | #ifdef CONFIG_RPS |
0a9627f2 | 991 | &rps_cpus_attribute.attr, |
fec5e652 | 992 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 993 | #endif |
0a9627f2 TH |
994 | NULL |
995 | }; | |
be0d6926 | 996 | ATTRIBUTE_GROUPS(rx_queue_default); |
0a9627f2 TH |
997 | |
998 | static void rx_queue_release(struct kobject *kobj) | |
999 | { | |
1000 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 1001 | #ifdef CONFIG_RPS |
6e3f7faf ED |
1002 | struct rps_map *map; |
1003 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 1004 | |
33d480ce | 1005 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
1006 | if (map) { |
1007 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 1008 | kfree_rcu(map, rcu); |
9ea19481 | 1009 | } |
6e3f7faf | 1010 | |
33d480ce | 1011 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
1012 | if (flow_table) { |
1013 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 1014 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 1015 | } |
a953be53 | 1016 | #endif |
0a9627f2 | 1017 | |
9ea19481 | 1018 | memset(kobj, 0, sizeof(*kobj)); |
80e8921b | 1019 | dev_put_track(queue->dev, &queue->dev_tracker); |
0a9627f2 TH |
1020 | } |
1021 | ||
82ef3d5d WC |
1022 | static const void *rx_queue_namespace(struct kobject *kobj) |
1023 | { | |
1024 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
1025 | struct device *dev = &queue->dev->dev; | |
1026 | const void *ns = NULL; | |
1027 | ||
1028 | if (dev->class && dev->class->ns_type) | |
1029 | ns = dev->class->namespace(dev); | |
1030 | ||
1031 | return ns; | |
1032 | } | |
1033 | ||
b0e37c0d DT |
1034 | static void rx_queue_get_ownership(struct kobject *kobj, |
1035 | kuid_t *uid, kgid_t *gid) | |
1036 | { | |
1037 | const struct net *net = rx_queue_namespace(kobj); | |
1038 | ||
1039 | net_ns_get_ownership(net, uid, gid); | |
1040 | } | |
1041 | ||
667e427b | 1042 | static struct kobj_type rx_queue_ktype __ro_after_init = { |
0a9627f2 TH |
1043 | .sysfs_ops = &rx_queue_sysfs_ops, |
1044 | .release = rx_queue_release, | |
be0d6926 | 1045 | .default_groups = rx_queue_default_groups, |
b0e37c0d DT |
1046 | .namespace = rx_queue_namespace, |
1047 | .get_ownership = rx_queue_get_ownership, | |
0a9627f2 TH |
1048 | }; |
1049 | ||
6b53dafe | 1050 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 1051 | { |
6b53dafe | 1052 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
1053 | struct kobject *kobj = &queue->kobj; |
1054 | int error = 0; | |
1055 | ||
ddd9b5e3 JH |
1056 | /* Kobject_put later will trigger rx_queue_release call which |
1057 | * decreases dev refcount: Take that reference here | |
1058 | */ | |
80e8921b | 1059 | dev_hold_track(queue->dev, &queue->dev_tracker, GFP_KERNEL); |
ddd9b5e3 | 1060 | |
6b53dafe | 1061 | kobj->kset = dev->queues_kset; |
0a9627f2 | 1062 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
6648c65e | 1063 | "rx-%u", index); |
a953be53 | 1064 | if (error) |
b8eb7183 | 1065 | goto err; |
a953be53 | 1066 | |
6b53dafe WC |
1067 | if (dev->sysfs_rx_queue_group) { |
1068 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
b8eb7183 JH |
1069 | if (error) |
1070 | goto err; | |
0a9627f2 TH |
1071 | } |
1072 | ||
1073 | kobject_uevent(kobj, KOBJ_ADD); | |
1074 | ||
1075 | return error; | |
b8eb7183 JH |
1076 | |
1077 | err: | |
1078 | kobject_put(kobj); | |
1079 | return error; | |
0a9627f2 | 1080 | } |
d755407d CB |
1081 | |
1082 | static int rx_queue_change_owner(struct net_device *dev, int index, kuid_t kuid, | |
1083 | kgid_t kgid) | |
1084 | { | |
1085 | struct netdev_rx_queue *queue = dev->_rx + index; | |
1086 | struct kobject *kobj = &queue->kobj; | |
1087 | int error; | |
1088 | ||
1089 | error = sysfs_change_owner(kobj, kuid, kgid); | |
1090 | if (error) | |
1091 | return error; | |
1092 | ||
1093 | if (dev->sysfs_rx_queue_group) | |
1094 | error = sysfs_group_change_owner( | |
1095 | kobj, dev->sysfs_rx_queue_group, kuid, kgid); | |
1096 | ||
1097 | return error; | |
1098 | } | |
80dd6eac | 1099 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 1100 | |
62fe0b40 | 1101 | int |
6b53dafe | 1102 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 1103 | { |
a953be53 | 1104 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1105 | int i; |
1106 | int error = 0; | |
1107 | ||
a953be53 | 1108 | #ifndef CONFIG_RPS |
6b53dafe | 1109 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
1110 | return 0; |
1111 | #endif | |
62fe0b40 | 1112 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 1113 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
1114 | if (error) { |
1115 | new_num = old_num; | |
0a9627f2 | 1116 | break; |
62fe0b40 | 1117 | } |
0a9627f2 TH |
1118 | } |
1119 | ||
a953be53 | 1120 | while (--i >= new_num) { |
002d8a1a AV |
1121 | struct kobject *kobj = &dev->_rx[i].kobj; |
1122 | ||
8b8f3e66 | 1123 | if (!refcount_read(&dev_net(dev)->ns.count)) |
002d8a1a | 1124 | kobj->uevent_suppress = 1; |
6b53dafe | 1125 | if (dev->sysfs_rx_queue_group) |
002d8a1a AV |
1126 | sysfs_remove_group(kobj, dev->sysfs_rx_queue_group); |
1127 | kobject_put(kobj); | |
a953be53 | 1128 | } |
0a9627f2 TH |
1129 | |
1130 | return error; | |
bf264145 TH |
1131 | #else |
1132 | return 0; | |
1133 | #endif | |
0a9627f2 TH |
1134 | } |
1135 | ||
d755407d CB |
1136 | static int net_rx_queue_change_owner(struct net_device *dev, int num, |
1137 | kuid_t kuid, kgid_t kgid) | |
1138 | { | |
1139 | #ifdef CONFIG_SYSFS | |
1140 | int error = 0; | |
1141 | int i; | |
1142 | ||
1143 | #ifndef CONFIG_RPS | |
1144 | if (!dev->sysfs_rx_queue_group) | |
1145 | return 0; | |
1146 | #endif | |
1147 | for (i = 0; i < num; i++) { | |
1148 | error = rx_queue_change_owner(dev, i, kuid, kgid); | |
1149 | if (error) | |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | return error; | |
1154 | #else | |
1155 | return 0; | |
1156 | #endif | |
1157 | } | |
1158 | ||
ccf5ff69 | 1159 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1160 | /* |
1161 | * netdev_queue sysfs structures and functions. | |
1162 | */ | |
1163 | struct netdev_queue_attribute { | |
1164 | struct attribute attr; | |
718ad681 | 1165 | ssize_t (*show)(struct netdev_queue *queue, char *buf); |
1d24eb48 | 1166 | ssize_t (*store)(struct netdev_queue *queue, |
718ad681 | 1167 | const char *buf, size_t len); |
1d24eb48 | 1168 | }; |
6648c65e | 1169 | #define to_netdev_queue_attr(_attr) \ |
1170 | container_of(_attr, struct netdev_queue_attribute, attr) | |
1d24eb48 TH |
1171 | |
1172 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
1173 | ||
1174 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
1175 | struct attribute *attr, char *buf) | |
1176 | { | |
667e427b | 1177 | const struct netdev_queue_attribute *attribute |
1178 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1179 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1180 | ||
1181 | if (!attribute->show) | |
1182 | return -EIO; | |
1183 | ||
718ad681 | 1184 | return attribute->show(queue, buf); |
1d24eb48 TH |
1185 | } |
1186 | ||
1187 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
1188 | struct attribute *attr, | |
1189 | const char *buf, size_t count) | |
1190 | { | |
667e427b | 1191 | const struct netdev_queue_attribute *attribute |
1192 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1193 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1194 | ||
1195 | if (!attribute->store) | |
1196 | return -EIO; | |
1197 | ||
718ad681 | 1198 | return attribute->store(queue, buf, count); |
1d24eb48 TH |
1199 | } |
1200 | ||
1201 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
1202 | .show = netdev_queue_attr_show, | |
1203 | .store = netdev_queue_attr_store, | |
1204 | }; | |
1205 | ||
2b9c7581 | 1206 | static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf) |
ccf5ff69 | 1207 | { |
8160fb43 | 1208 | unsigned long trans_timeout = atomic_long_read(&queue->trans_timeout); |
ccf5ff69 | 1209 | |
9bb5fbea | 1210 | return sprintf(buf, fmt_ulong, trans_timeout); |
ccf5ff69 | 1211 | } |
1212 | ||
c4047f53 | 1213 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
822b3b2e JF |
1214 | { |
1215 | struct net_device *dev = queue->dev; | |
c4047f53 | 1216 | unsigned int i; |
822b3b2e | 1217 | |
c4047f53 | 1218 | i = queue - dev->_tx; |
822b3b2e JF |
1219 | BUG_ON(i >= dev->num_tx_queues); |
1220 | ||
1221 | return i; | |
1222 | } | |
1223 | ||
2b9c7581 | 1224 | static ssize_t traffic_class_show(struct netdev_queue *queue, |
8d059b0f AD |
1225 | char *buf) |
1226 | { | |
1227 | struct net_device *dev = queue->dev; | |
b2f17564 | 1228 | int num_tc, tc; |
d7be9775 | 1229 | int index; |
8d059b0f | 1230 | |
d7be9775 AD |
1231 | if (!netif_is_multiqueue(dev)) |
1232 | return -ENOENT; | |
1233 | ||
b2f17564 AD |
1234 | if (!rtnl_trylock()) |
1235 | return restart_syscall(); | |
1236 | ||
d7be9775 | 1237 | index = get_netdev_queue_index(queue); |
ffcfe25b AD |
1238 | |
1239 | /* If queue belongs to subordinate dev use its TC mapping */ | |
1240 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1241 | ||
b2f17564 | 1242 | num_tc = dev->num_tc; |
d7be9775 | 1243 | tc = netdev_txq_to_tc(dev, index); |
b2f17564 AD |
1244 | |
1245 | rtnl_unlock(); | |
1246 | ||
8d059b0f AD |
1247 | if (tc < 0) |
1248 | return -EINVAL; | |
1249 | ||
ffcfe25b AD |
1250 | /* We can report the traffic class one of two ways: |
1251 | * Subordinate device traffic classes are reported with the traffic | |
1252 | * class first, and then the subordinate class so for example TC0 on | |
1253 | * subordinate device 2 will be reported as "0-2". If the queue | |
1254 | * belongs to the root device it will be reported with just the | |
1255 | * traffic class, so just "0" for TC 0 for example. | |
1256 | */ | |
b2f17564 AD |
1257 | return num_tc < 0 ? sprintf(buf, "%d%d\n", tc, num_tc) : |
1258 | sprintf(buf, "%d\n", tc); | |
8d059b0f AD |
1259 | } |
1260 | ||
1261 | #ifdef CONFIG_XPS | |
2b9c7581 | 1262 | static ssize_t tx_maxrate_show(struct netdev_queue *queue, |
822b3b2e JF |
1263 | char *buf) |
1264 | { | |
1265 | return sprintf(buf, "%lu\n", queue->tx_maxrate); | |
1266 | } | |
1267 | ||
2b9c7581 | 1268 | static ssize_t tx_maxrate_store(struct netdev_queue *queue, |
1269 | const char *buf, size_t len) | |
822b3b2e JF |
1270 | { |
1271 | struct net_device *dev = queue->dev; | |
1272 | int err, index = get_netdev_queue_index(queue); | |
1273 | u32 rate = 0; | |
1274 | ||
3033fced TH |
1275 | if (!capable(CAP_NET_ADMIN)) |
1276 | return -EPERM; | |
1277 | ||
146e5e73 AT |
1278 | /* The check is also done later; this helps returning early without |
1279 | * hitting the trylock/restart below. | |
1280 | */ | |
1281 | if (!dev->netdev_ops->ndo_set_tx_maxrate) | |
1282 | return -EOPNOTSUPP; | |
1283 | ||
822b3b2e JF |
1284 | err = kstrtou32(buf, 10, &rate); |
1285 | if (err < 0) | |
1286 | return err; | |
1287 | ||
1288 | if (!rtnl_trylock()) | |
1289 | return restart_syscall(); | |
1290 | ||
1291 | err = -EOPNOTSUPP; | |
1292 | if (dev->netdev_ops->ndo_set_tx_maxrate) | |
1293 | err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); | |
1294 | ||
1295 | rtnl_unlock(); | |
1296 | if (!err) { | |
1297 | queue->tx_maxrate = rate; | |
1298 | return len; | |
1299 | } | |
1300 | return err; | |
1301 | } | |
1302 | ||
2b9c7581 | 1303 | static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init |
1304 | = __ATTR_RW(tx_maxrate); | |
822b3b2e JF |
1305 | #endif |
1306 | ||
2b9c7581 | 1307 | static struct netdev_queue_attribute queue_trans_timeout __ro_after_init |
1308 | = __ATTR_RO(tx_timeout); | |
ccf5ff69 | 1309 | |
2b9c7581 | 1310 | static struct netdev_queue_attribute queue_traffic_class __ro_after_init |
1311 | = __ATTR_RO(traffic_class); | |
8d059b0f | 1312 | |
114cf580 TH |
1313 | #ifdef CONFIG_BQL |
1314 | /* | |
1315 | * Byte queue limits sysfs structures and functions. | |
1316 | */ | |
1317 | static ssize_t bql_show(char *buf, unsigned int value) | |
1318 | { | |
1319 | return sprintf(buf, "%u\n", value); | |
1320 | } | |
1321 | ||
1322 | static ssize_t bql_set(const char *buf, const size_t count, | |
1323 | unsigned int *pvalue) | |
1324 | { | |
1325 | unsigned int value; | |
1326 | int err; | |
1327 | ||
6648c65e | 1328 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) { |
114cf580 | 1329 | value = DQL_MAX_LIMIT; |
6648c65e | 1330 | } else { |
114cf580 TH |
1331 | err = kstrtouint(buf, 10, &value); |
1332 | if (err < 0) | |
1333 | return err; | |
1334 | if (value > DQL_MAX_LIMIT) | |
1335 | return -EINVAL; | |
1336 | } | |
1337 | ||
1338 | *pvalue = value; | |
1339 | ||
1340 | return count; | |
1341 | } | |
1342 | ||
1343 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1344 | char *buf) |
1345 | { | |
1346 | struct dql *dql = &queue->dql; | |
1347 | ||
1348 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
1349 | } | |
1350 | ||
1351 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1352 | const char *buf, size_t len) |
1353 | { | |
1354 | struct dql *dql = &queue->dql; | |
95c96174 | 1355 | unsigned int value; |
114cf580 TH |
1356 | int err; |
1357 | ||
1358 | err = kstrtouint(buf, 10, &value); | |
1359 | if (err < 0) | |
1360 | return err; | |
1361 | ||
1362 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1363 | ||
1364 | return len; | |
1365 | } | |
1366 | ||
170c658a | 1367 | static struct netdev_queue_attribute bql_hold_time_attribute __ro_after_init |
d6444062 | 1368 | = __ATTR(hold_time, 0644, |
170c658a | 1369 | bql_show_hold_time, bql_set_hold_time); |
114cf580 TH |
1370 | |
1371 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
114cf580 TH |
1372 | char *buf) |
1373 | { | |
1374 | struct dql *dql = &queue->dql; | |
1375 | ||
1376 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
1377 | } | |
1378 | ||
170c658a | 1379 | static struct netdev_queue_attribute bql_inflight_attribute __ro_after_init = |
d6444062 | 1380 | __ATTR(inflight, 0444, bql_show_inflight, NULL); |
114cf580 TH |
1381 | |
1382 | #define BQL_ATTR(NAME, FIELD) \ | |
1383 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1384 | char *buf) \ |
1385 | { \ | |
1386 | return bql_show(buf, queue->dql.FIELD); \ | |
1387 | } \ | |
1388 | \ | |
1389 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1390 | const char *buf, size_t len) \ |
1391 | { \ | |
1392 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1393 | } \ | |
1394 | \ | |
170c658a | 1395 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute __ro_after_init \ |
d6444062 | 1396 | = __ATTR(NAME, 0644, \ |
170c658a | 1397 | bql_show_ ## NAME, bql_set_ ## NAME) |
114cf580 | 1398 | |
170c658a | 1399 | BQL_ATTR(limit, limit); |
1400 | BQL_ATTR(limit_max, max_limit); | |
1401 | BQL_ATTR(limit_min, min_limit); | |
114cf580 | 1402 | |
170c658a | 1403 | static struct attribute *dql_attrs[] __ro_after_init = { |
114cf580 TH |
1404 | &bql_limit_attribute.attr, |
1405 | &bql_limit_max_attribute.attr, | |
1406 | &bql_limit_min_attribute.attr, | |
1407 | &bql_hold_time_attribute.attr, | |
1408 | &bql_inflight_attribute.attr, | |
1409 | NULL | |
1410 | }; | |
1411 | ||
38ef00cc | 1412 | static const struct attribute_group dql_group = { |
114cf580 TH |
1413 | .name = "byte_queue_limits", |
1414 | .attrs = dql_attrs, | |
1415 | }; | |
1416 | #endif /* CONFIG_BQL */ | |
1417 | ||
ccf5ff69 | 1418 | #ifdef CONFIG_XPS |
2db6cdae AT |
1419 | static ssize_t xps_queue_show(struct net_device *dev, unsigned int index, |
1420 | int tc, char *buf, enum xps_map_type type) | |
1d24eb48 | 1421 | { |
1d24eb48 | 1422 | struct xps_dev_maps *dev_maps; |
d9a063d2 | 1423 | unsigned long *mask; |
2db6cdae AT |
1424 | unsigned int nr_ids; |
1425 | int j, len; | |
d7be87a6 | 1426 | |
5478fcd0 | 1427 | rcu_read_lock(); |
2db6cdae AT |
1428 | dev_maps = rcu_dereference(dev->xps_maps[type]); |
1429 | ||
1430 | /* Default to nr_cpu_ids/dev->num_rx_queues and do not just return 0 | |
1431 | * when dev_maps hasn't been allocated yet, to be backward compatible. | |
1432 | */ | |
1433 | nr_ids = dev_maps ? dev_maps->nr_ids : | |
1434 | (type == XPS_CPUS ? nr_cpu_ids : dev->num_rx_queues); | |
5478fcd0 | 1435 | |
7f08ec6e | 1436 | mask = bitmap_zalloc(nr_ids, GFP_NOWAIT); |
ea4fe7e8 | 1437 | if (!mask) { |
2db6cdae AT |
1438 | rcu_read_unlock(); |
1439 | return -ENOMEM; | |
fb250385 | 1440 | } |
664088f8 | 1441 | |
255c04a8 | 1442 | if (!dev_maps || tc >= dev_maps->num_tc) |
73f5e52b AT |
1443 | goto out_no_maps; |
1444 | ||
6f36158e | 1445 | for (j = 0; j < nr_ids; j++) { |
255c04a8 | 1446 | int i, tci = j * dev_maps->num_tc + tc; |
73f5e52b AT |
1447 | struct xps_map *map; |
1448 | ||
1449 | map = rcu_dereference(dev_maps->attr_map[tci]); | |
1450 | if (!map) | |
1451 | continue; | |
1452 | ||
1453 | for (i = map->len; i--;) { | |
1454 | if (map->queues[i] == index) { | |
08a7abf4 | 1455 | __set_bit(j, mask); |
73f5e52b | 1456 | break; |
1d24eb48 TH |
1457 | } |
1458 | } | |
1459 | } | |
73f5e52b | 1460 | out_no_maps: |
1d24eb48 | 1461 | rcu_read_unlock(); |
fb250385 | 1462 | |
5478fcd0 | 1463 | len = bitmap_print_to_pagebuf(false, buf, mask, nr_ids); |
ea4fe7e8 | 1464 | bitmap_free(mask); |
2db6cdae | 1465 | |
f0906827 | 1466 | return len < PAGE_SIZE ? len : -EINVAL; |
2db6cdae AT |
1467 | } |
1468 | ||
1469 | static ssize_t xps_cpus_show(struct netdev_queue *queue, char *buf) | |
1470 | { | |
1471 | struct net_device *dev = queue->dev; | |
1472 | unsigned int index; | |
1473 | int len, tc; | |
1474 | ||
1475 | if (!netif_is_multiqueue(dev)) | |
1476 | return -ENOENT; | |
1477 | ||
1478 | index = get_netdev_queue_index(queue); | |
1479 | ||
1480 | if (!rtnl_trylock()) | |
1481 | return restart_syscall(); | |
1482 | ||
1483 | /* If queue belongs to subordinate dev use its map */ | |
1484 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1485 | ||
1486 | tc = netdev_txq_to_tc(dev, index); | |
1487 | if (tc < 0) { | |
1488 | rtnl_unlock(); | |
1489 | return -EINVAL; | |
1490 | } | |
1491 | ||
1492 | /* Make sure the subordinate device can't be freed */ | |
1493 | get_device(&dev->dev); | |
1494 | rtnl_unlock(); | |
1495 | ||
1496 | len = xps_queue_show(dev, index, tc, buf, XPS_CPUS); | |
fb250385 | 1497 | |
d7be87a6 | 1498 | put_device(&dev->dev); |
2db6cdae | 1499 | return len; |
1d24eb48 TH |
1500 | } |
1501 | ||
2b9c7581 | 1502 | static ssize_t xps_cpus_store(struct netdev_queue *queue, |
1503 | const char *buf, size_t len) | |
1d24eb48 TH |
1504 | { |
1505 | struct net_device *dev = queue->dev; | |
d9a063d2 | 1506 | unsigned int index; |
537c00de AD |
1507 | cpumask_var_t mask; |
1508 | int err; | |
1d24eb48 | 1509 | |
d7be9775 AD |
1510 | if (!netif_is_multiqueue(dev)) |
1511 | return -ENOENT; | |
1512 | ||
1d24eb48 TH |
1513 | if (!capable(CAP_NET_ADMIN)) |
1514 | return -EPERM; | |
1515 | ||
1516 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1517 | return -ENOMEM; | |
1518 | ||
1519 | index = get_netdev_queue_index(queue); | |
1520 | ||
1521 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1522 | if (err) { | |
1523 | free_cpumask_var(mask); | |
1524 | return err; | |
1525 | } | |
1526 | ||
1ad58225 AT |
1527 | if (!rtnl_trylock()) { |
1528 | free_cpumask_var(mask); | |
1529 | return restart_syscall(); | |
1530 | } | |
1531 | ||
537c00de | 1532 | err = netif_set_xps_queue(dev, mask, index); |
1ad58225 | 1533 | rtnl_unlock(); |
1d24eb48 TH |
1534 | |
1535 | free_cpumask_var(mask); | |
1d24eb48 | 1536 | |
537c00de | 1537 | return err ? : len; |
1d24eb48 TH |
1538 | } |
1539 | ||
2b9c7581 | 1540 | static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init |
1541 | = __ATTR_RW(xps_cpus); | |
8af2c06f AN |
1542 | |
1543 | static ssize_t xps_rxqs_show(struct netdev_queue *queue, char *buf) | |
1544 | { | |
1545 | struct net_device *dev = queue->dev; | |
2db6cdae AT |
1546 | unsigned int index; |
1547 | int tc; | |
8af2c06f AN |
1548 | |
1549 | index = get_netdev_queue_index(queue); | |
1550 | ||
4ae2bb81 AT |
1551 | if (!rtnl_trylock()) |
1552 | return restart_syscall(); | |
1553 | ||
255c04a8 | 1554 | tc = netdev_txq_to_tc(dev, index); |
d7be87a6 AT |
1555 | rtnl_unlock(); |
1556 | if (tc < 0) | |
1557 | return -EINVAL; | |
255c04a8 | 1558 | |
2db6cdae | 1559 | return xps_queue_show(dev, index, tc, buf, XPS_RXQS); |
8af2c06f AN |
1560 | } |
1561 | ||
1562 | static ssize_t xps_rxqs_store(struct netdev_queue *queue, const char *buf, | |
1563 | size_t len) | |
1564 | { | |
1565 | struct net_device *dev = queue->dev; | |
1566 | struct net *net = dev_net(dev); | |
d9a063d2 AT |
1567 | unsigned long *mask; |
1568 | unsigned int index; | |
8af2c06f AN |
1569 | int err; |
1570 | ||
1571 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1572 | return -EPERM; | |
1573 | ||
29ca1c5a | 1574 | mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL); |
8af2c06f AN |
1575 | if (!mask) |
1576 | return -ENOMEM; | |
1577 | ||
1578 | index = get_netdev_queue_index(queue); | |
1579 | ||
1580 | err = bitmap_parse(buf, len, mask, dev->num_rx_queues); | |
1581 | if (err) { | |
29ca1c5a | 1582 | bitmap_free(mask); |
8af2c06f AN |
1583 | return err; |
1584 | } | |
1585 | ||
2d57b4f1 AT |
1586 | if (!rtnl_trylock()) { |
1587 | bitmap_free(mask); | |
1588 | return restart_syscall(); | |
1589 | } | |
1590 | ||
4d99f660 | 1591 | cpus_read_lock(); |
044ab86d | 1592 | err = __netif_set_xps_queue(dev, mask, index, XPS_RXQS); |
4d99f660 AV |
1593 | cpus_read_unlock(); |
1594 | ||
2d57b4f1 AT |
1595 | rtnl_unlock(); |
1596 | ||
29ca1c5a | 1597 | bitmap_free(mask); |
8af2c06f AN |
1598 | return err ? : len; |
1599 | } | |
1600 | ||
1601 | static struct netdev_queue_attribute xps_rxqs_attribute __ro_after_init | |
1602 | = __ATTR_RW(xps_rxqs); | |
ccf5ff69 | 1603 | #endif /* CONFIG_XPS */ |
1d24eb48 | 1604 | |
2b9c7581 | 1605 | static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { |
ccf5ff69 | 1606 | &queue_trans_timeout.attr, |
8d059b0f | 1607 | &queue_traffic_class.attr, |
ccf5ff69 | 1608 | #ifdef CONFIG_XPS |
1d24eb48 | 1609 | &xps_cpus_attribute.attr, |
8af2c06f | 1610 | &xps_rxqs_attribute.attr, |
822b3b2e | 1611 | &queue_tx_maxrate.attr, |
ccf5ff69 | 1612 | #endif |
1d24eb48 TH |
1613 | NULL |
1614 | }; | |
be0d6926 | 1615 | ATTRIBUTE_GROUPS(netdev_queue_default); |
1d24eb48 TH |
1616 | |
1617 | static void netdev_queue_release(struct kobject *kobj) | |
1618 | { | |
1619 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1620 | |
1d24eb48 | 1621 | memset(kobj, 0, sizeof(*kobj)); |
0b688f24 | 1622 | dev_put_track(queue->dev, &queue->dev_tracker); |
1d24eb48 TH |
1623 | } |
1624 | ||
82ef3d5d WC |
1625 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1626 | { | |
1627 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1628 | struct device *dev = &queue->dev->dev; | |
1629 | const void *ns = NULL; | |
1630 | ||
1631 | if (dev->class && dev->class->ns_type) | |
1632 | ns = dev->class->namespace(dev); | |
1633 | ||
1634 | return ns; | |
1635 | } | |
1636 | ||
b0e37c0d DT |
1637 | static void netdev_queue_get_ownership(struct kobject *kobj, |
1638 | kuid_t *uid, kgid_t *gid) | |
1639 | { | |
1640 | const struct net *net = netdev_queue_namespace(kobj); | |
1641 | ||
1642 | net_ns_get_ownership(net, uid, gid); | |
1643 | } | |
1644 | ||
2b9c7581 | 1645 | static struct kobj_type netdev_queue_ktype __ro_after_init = { |
1d24eb48 TH |
1646 | .sysfs_ops = &netdev_queue_sysfs_ops, |
1647 | .release = netdev_queue_release, | |
be0d6926 | 1648 | .default_groups = netdev_queue_default_groups, |
82ef3d5d | 1649 | .namespace = netdev_queue_namespace, |
b0e37c0d | 1650 | .get_ownership = netdev_queue_get_ownership, |
1d24eb48 TH |
1651 | }; |
1652 | ||
6b53dafe | 1653 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1654 | { |
6b53dafe | 1655 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1656 | struct kobject *kobj = &queue->kobj; |
1657 | int error = 0; | |
1658 | ||
e0b60903 JH |
1659 | /* Kobject_put later will trigger netdev_queue_release call |
1660 | * which decreases dev refcount: Take that reference here | |
1661 | */ | |
0b688f24 | 1662 | dev_hold_track(queue->dev, &queue->dev_tracker, GFP_KERNEL); |
e0b60903 | 1663 | |
6b53dafe | 1664 | kobj->kset = dev->queues_kset; |
1d24eb48 | 1665 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
6648c65e | 1666 | "tx-%u", index); |
114cf580 | 1667 | if (error) |
b8eb7183 | 1668 | goto err; |
114cf580 TH |
1669 | |
1670 | #ifdef CONFIG_BQL | |
1671 | error = sysfs_create_group(kobj, &dql_group); | |
b8eb7183 JH |
1672 | if (error) |
1673 | goto err; | |
114cf580 | 1674 | #endif |
1d24eb48 TH |
1675 | |
1676 | kobject_uevent(kobj, KOBJ_ADD); | |
48a322b6 | 1677 | return 0; |
1d24eb48 | 1678 | |
b8eb7183 JH |
1679 | err: |
1680 | kobject_put(kobj); | |
1681 | return error; | |
1d24eb48 | 1682 | } |
d755407d CB |
1683 | |
1684 | static int tx_queue_change_owner(struct net_device *ndev, int index, | |
1685 | kuid_t kuid, kgid_t kgid) | |
1686 | { | |
1687 | struct netdev_queue *queue = ndev->_tx + index; | |
1688 | struct kobject *kobj = &queue->kobj; | |
1689 | int error; | |
1690 | ||
1691 | error = sysfs_change_owner(kobj, kuid, kgid); | |
1692 | if (error) | |
1693 | return error; | |
1694 | ||
1695 | #ifdef CONFIG_BQL | |
1696 | error = sysfs_group_change_owner(kobj, &dql_group, kuid, kgid); | |
1697 | #endif | |
1698 | return error; | |
1699 | } | |
ccf5ff69 | 1700 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1701 | |
1702 | int | |
6b53dafe | 1703 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1704 | { |
ccf5ff69 | 1705 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1706 | int i; |
1707 | int error = 0; | |
1708 | ||
5f1c802c AT |
1709 | /* Tx queue kobjects are allowed to be updated when a device is being |
1710 | * unregistered, but solely to remove queues from qdiscs. Any path | |
1711 | * adding queues should be fixed. | |
1712 | */ | |
1713 | WARN(dev->reg_state == NETREG_UNREGISTERING && new_num > old_num, | |
1714 | "New queues can't be registered after device unregistration."); | |
1715 | ||
1d24eb48 | 1716 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 1717 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1718 | if (error) { |
1719 | new_num = old_num; | |
1720 | break; | |
1721 | } | |
1722 | } | |
1723 | ||
114cf580 | 1724 | while (--i >= new_num) { |
6b53dafe | 1725 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 | 1726 | |
8b8f3e66 | 1727 | if (!refcount_read(&dev_net(dev)->ns.count)) |
002d8a1a | 1728 | queue->kobj.uevent_suppress = 1; |
114cf580 TH |
1729 | #ifdef CONFIG_BQL |
1730 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1731 | #endif | |
1732 | kobject_put(&queue->kobj); | |
1733 | } | |
1d24eb48 TH |
1734 | |
1735 | return error; | |
bf264145 TH |
1736 | #else |
1737 | return 0; | |
ccf5ff69 | 1738 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1739 | } |
1740 | ||
d755407d CB |
1741 | static int net_tx_queue_change_owner(struct net_device *dev, int num, |
1742 | kuid_t kuid, kgid_t kgid) | |
1743 | { | |
1744 | #ifdef CONFIG_SYSFS | |
1745 | int error = 0; | |
1746 | int i; | |
1747 | ||
1748 | for (i = 0; i < num; i++) { | |
1749 | error = tx_queue_change_owner(dev, i, kuid, kgid); | |
1750 | if (error) | |
1751 | break; | |
1752 | } | |
1753 | ||
1754 | return error; | |
1755 | #else | |
1756 | return 0; | |
1757 | #endif /* CONFIG_SYSFS */ | |
1758 | } | |
1759 | ||
6b53dafe | 1760 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1761 | { |
bf264145 | 1762 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1763 | |
ccf5ff69 | 1764 | #ifdef CONFIG_SYSFS |
6b53dafe | 1765 | dev->queues_kset = kset_create_and_add("queues", |
6648c65e | 1766 | NULL, &dev->dev.kobj); |
6b53dafe | 1767 | if (!dev->queues_kset) |
62fe0b40 | 1768 | return -ENOMEM; |
6b53dafe | 1769 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1770 | #endif |
6b53dafe | 1771 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1772 | |
6b53dafe | 1773 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1774 | if (error) |
1775 | goto error; | |
bf264145 | 1776 | rxq = real_rx; |
1d24eb48 | 1777 | |
6b53dafe | 1778 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1779 | if (error) |
1780 | goto error; | |
bf264145 | 1781 | txq = real_tx; |
1d24eb48 TH |
1782 | |
1783 | return 0; | |
1784 | ||
1785 | error: | |
6b53dafe WC |
1786 | netdev_queue_update_kobjects(dev, txq, 0); |
1787 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
895a5e96 Y |
1788 | #ifdef CONFIG_SYSFS |
1789 | kset_unregister(dev->queues_kset); | |
1790 | #endif | |
1d24eb48 | 1791 | return error; |
62fe0b40 | 1792 | } |
0a9627f2 | 1793 | |
d755407d CB |
1794 | static int queue_change_owner(struct net_device *ndev, kuid_t kuid, kgid_t kgid) |
1795 | { | |
1796 | int error = 0, real_rx = 0, real_tx = 0; | |
1797 | ||
1798 | #ifdef CONFIG_SYSFS | |
1799 | if (ndev->queues_kset) { | |
1800 | error = sysfs_change_owner(&ndev->queues_kset->kobj, kuid, kgid); | |
1801 | if (error) | |
1802 | return error; | |
1803 | } | |
1804 | real_rx = ndev->real_num_rx_queues; | |
1805 | #endif | |
1806 | real_tx = ndev->real_num_tx_queues; | |
1807 | ||
1808 | error = net_rx_queue_change_owner(ndev, real_rx, kuid, kgid); | |
1809 | if (error) | |
1810 | return error; | |
1811 | ||
1812 | error = net_tx_queue_change_owner(ndev, real_tx, kuid, kgid); | |
1813 | if (error) | |
1814 | return error; | |
1815 | ||
1816 | return 0; | |
1817 | } | |
1818 | ||
6b53dafe | 1819 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1820 | { |
bf264145 TH |
1821 | int real_rx = 0, real_tx = 0; |
1822 | ||
a953be53 | 1823 | #ifdef CONFIG_SYSFS |
6b53dafe | 1824 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1825 | #endif |
6b53dafe | 1826 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1827 | |
6b53dafe WC |
1828 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1829 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
d7dac083 AT |
1830 | |
1831 | dev->real_num_rx_queues = 0; | |
1832 | dev->real_num_tx_queues = 0; | |
ccf5ff69 | 1833 | #ifdef CONFIG_SYSFS |
6b53dafe | 1834 | kset_unregister(dev->queues_kset); |
bf264145 | 1835 | #endif |
0a9627f2 | 1836 | } |
608b4b95 | 1837 | |
7dc5dbc8 EB |
1838 | static bool net_current_may_mount(void) |
1839 | { | |
1840 | struct net *net = current->nsproxy->net_ns; | |
1841 | ||
1842 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1843 | } | |
1844 | ||
a685e089 | 1845 | static void *net_grab_current_ns(void) |
608b4b95 | 1846 | { |
a685e089 AV |
1847 | struct net *ns = current->nsproxy->net_ns; |
1848 | #ifdef CONFIG_NET_NS | |
1849 | if (ns) | |
c122e14d | 1850 | refcount_inc(&ns->passive); |
a685e089 AV |
1851 | #endif |
1852 | return ns; | |
608b4b95 EB |
1853 | } |
1854 | ||
1855 | static const void *net_initial_ns(void) | |
1856 | { | |
1857 | return &init_net; | |
1858 | } | |
1859 | ||
1860 | static const void *net_netlink_ns(struct sock *sk) | |
1861 | { | |
1862 | return sock_net(sk); | |
1863 | } | |
1864 | ||
737aec57 | 1865 | const struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1866 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1867 | .current_may_mount = net_current_may_mount, |
a685e089 | 1868 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1869 | .netlink_ns = net_netlink_ns, |
1870 | .initial_ns = net_initial_ns, | |
a685e089 | 1871 | .drop_ns = net_drop_ns, |
608b4b95 | 1872 | }; |
04600794 | 1873 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1874 | |
7eff2e7a | 1875 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1876 | { |
43cb76d9 | 1877 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1878 | int retval; |
1da177e4 | 1879 | |
312c004d | 1880 | /* pass interface to uevent. */ |
7eff2e7a | 1881 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1882 | if (retval) |
1883 | goto exit; | |
ca2f37db JT |
1884 | |
1885 | /* pass ifindex to uevent. | |
1886 | * ifindex is useful as it won't change (interface name may change) | |
6648c65e | 1887 | * and is what RtNetlink uses natively. |
1888 | */ | |
7eff2e7a | 1889 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1890 | |
bf62456e | 1891 | exit: |
bf62456e | 1892 | return retval; |
1da177e4 | 1893 | } |
1da177e4 LT |
1894 | |
1895 | /* | |
4ec93edb | 1896 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1897 | * Called when last reference to device kobject is gone. |
1da177e4 | 1898 | */ |
43cb76d9 | 1899 | static void netdev_release(struct device *d) |
1da177e4 | 1900 | { |
43cb76d9 | 1901 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1902 | |
1903 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1904 | ||
6c557001 FW |
1905 | /* no need to wait for rcu grace period: |
1906 | * device is dead and about to be freed. | |
1907 | */ | |
1908 | kfree(rcu_access_pointer(dev->ifalias)); | |
74d332c1 | 1909 | netdev_freemem(dev); |
1da177e4 LT |
1910 | } |
1911 | ||
608b4b95 EB |
1912 | static const void *net_namespace(struct device *d) |
1913 | { | |
5c29482d GT |
1914 | struct net_device *dev = to_net_dev(d); |
1915 | ||
608b4b95 EB |
1916 | return dev_net(dev); |
1917 | } | |
1918 | ||
b0e37c0d DT |
1919 | static void net_get_ownership(struct device *d, kuid_t *uid, kgid_t *gid) |
1920 | { | |
1921 | struct net_device *dev = to_net_dev(d); | |
1922 | const struct net *net = dev_net(dev); | |
1923 | ||
1924 | net_ns_get_ownership(net, uid, gid); | |
1925 | } | |
1926 | ||
e6d473e6 | 1927 | static struct class net_class __ro_after_init = { |
1da177e4 | 1928 | .name = "net", |
43cb76d9 | 1929 | .dev_release = netdev_release, |
6be8aeef | 1930 | .dev_groups = net_class_groups, |
43cb76d9 | 1931 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1932 | .ns_type = &net_ns_type_operations, |
1933 | .namespace = net_namespace, | |
b0e37c0d | 1934 | .get_ownership = net_get_ownership, |
1da177e4 LT |
1935 | }; |
1936 | ||
e330fb14 | 1937 | #ifdef CONFIG_OF |
aa836df9 FF |
1938 | static int of_dev_node_match(struct device *dev, const void *data) |
1939 | { | |
2e186a2c TW |
1940 | for (; dev; dev = dev->parent) { |
1941 | if (dev->of_node == data) | |
1942 | return 1; | |
1943 | } | |
aa836df9 | 1944 | |
2e186a2c | 1945 | return 0; |
aa836df9 FF |
1946 | } |
1947 | ||
9861f720 RK |
1948 | /* |
1949 | * of_find_net_device_by_node - lookup the net device for the device node | |
1950 | * @np: OF device node | |
1951 | * | |
1952 | * Looks up the net_device structure corresponding with the device node. | |
1953 | * If successful, returns a pointer to the net_device with the embedded | |
1954 | * struct device refcount incremented by one, or NULL on failure. The | |
1955 | * refcount must be dropped when done with the net_device. | |
1956 | */ | |
aa836df9 FF |
1957 | struct net_device *of_find_net_device_by_node(struct device_node *np) |
1958 | { | |
1959 | struct device *dev; | |
1960 | ||
1961 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1962 | if (!dev) | |
1963 | return NULL; | |
1964 | ||
1965 | return to_net_dev(dev); | |
1966 | } | |
1967 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1968 | #endif | |
1969 | ||
9093bbb2 SH |
1970 | /* Delete sysfs entries but hold kobject reference until after all |
1971 | * netdev references are gone. | |
1972 | */ | |
6b53dafe | 1973 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1974 | { |
6648c65e | 1975 | struct device *dev = &ndev->dev; |
9093bbb2 | 1976 | |
8b8f3e66 | 1977 | if (!refcount_read(&dev_net(ndev)->ns.count)) |
002d8a1a AV |
1978 | dev_set_uevent_suppress(dev, 1); |
1979 | ||
9093bbb2 | 1980 | kobject_get(&dev->kobj); |
3891845e | 1981 | |
6b53dafe | 1982 | remove_queue_kobjects(ndev); |
0a9627f2 | 1983 | |
9802c8e2 ML |
1984 | pm_runtime_set_memalloc_noio(dev, false); |
1985 | ||
9093bbb2 | 1986 | device_del(dev); |
1da177e4 LT |
1987 | } |
1988 | ||
1989 | /* Create sysfs entries for network device. */ | |
6b53dafe | 1990 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 1991 | { |
6648c65e | 1992 | struct device *dev = &ndev->dev; |
6b53dafe | 1993 | const struct attribute_group **groups = ndev->sysfs_groups; |
0a9627f2 | 1994 | int error = 0; |
1da177e4 | 1995 | |
a1b3f594 | 1996 | device_initialize(dev); |
43cb76d9 | 1997 | dev->class = &net_class; |
6b53dafe | 1998 | dev->platform_data = ndev; |
43cb76d9 | 1999 | dev->groups = groups; |
1da177e4 | 2000 | |
6b53dafe | 2001 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 2002 | |
8b41d188 | 2003 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
2004 | /* Allow for a device specific group */ |
2005 | if (*groups) | |
2006 | groups++; | |
1da177e4 | 2007 | |
0c509a6c | 2008 | *groups++ = &netstat_group; |
38c1a01c | 2009 | |
c304eddc | 2010 | if (wireless_group_needed(ndev)) |
38c1a01c | 2011 | *groups++ = &wireless_group; |
8b41d188 | 2012 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 2013 | |
0a9627f2 TH |
2014 | error = device_add(dev); |
2015 | if (error) | |
8ed633b9 | 2016 | return error; |
0a9627f2 | 2017 | |
6b53dafe | 2018 | error = register_queue_kobjects(ndev); |
8ed633b9 WH |
2019 | if (error) { |
2020 | device_del(dev); | |
2021 | return error; | |
2022 | } | |
0a9627f2 | 2023 | |
9802c8e2 ML |
2024 | pm_runtime_set_memalloc_noio(dev, true); |
2025 | ||
0a9627f2 | 2026 | return error; |
1da177e4 LT |
2027 | } |
2028 | ||
e6dee9f3 CB |
2029 | /* Change owner for sysfs entries when moving network devices across network |
2030 | * namespaces owned by different user namespaces. | |
2031 | */ | |
2032 | int netdev_change_owner(struct net_device *ndev, const struct net *net_old, | |
2033 | const struct net *net_new) | |
2034 | { | |
f7a1e76d XL |
2035 | kuid_t old_uid = GLOBAL_ROOT_UID, new_uid = GLOBAL_ROOT_UID; |
2036 | kgid_t old_gid = GLOBAL_ROOT_GID, new_gid = GLOBAL_ROOT_GID; | |
e6dee9f3 | 2037 | struct device *dev = &ndev->dev; |
e6dee9f3 CB |
2038 | int error; |
2039 | ||
2040 | net_ns_get_ownership(net_old, &old_uid, &old_gid); | |
2041 | net_ns_get_ownership(net_new, &new_uid, &new_gid); | |
2042 | ||
2043 | /* The network namespace was changed but the owning user namespace is | |
2044 | * identical so there's no need to change the owner of sysfs entries. | |
2045 | */ | |
2046 | if (uid_eq(old_uid, new_uid) && gid_eq(old_gid, new_gid)) | |
2047 | return 0; | |
2048 | ||
2049 | error = device_change_owner(dev, new_uid, new_gid); | |
2050 | if (error) | |
2051 | return error; | |
2052 | ||
d755407d CB |
2053 | error = queue_change_owner(ndev, new_uid, new_gid); |
2054 | if (error) | |
2055 | return error; | |
2056 | ||
e6dee9f3 CB |
2057 | return 0; |
2058 | } | |
2059 | ||
b793dc5c | 2060 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
58292cbe | 2061 | const void *ns) |
b8a9787e | 2062 | { |
58292cbe | 2063 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 2064 | } |
58292cbe | 2065 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 2066 | |
b793dc5c | 2067 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
58292cbe | 2068 | const void *ns) |
b8a9787e | 2069 | { |
58292cbe | 2070 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 2071 | } |
58292cbe | 2072 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 2073 | |
a48d4bb0 | 2074 | int __init netdev_kobject_init(void) |
1da177e4 | 2075 | { |
608b4b95 | 2076 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
2077 | return class_register(&net_class); |
2078 | } |