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 | |
cc26c266 | 36 | /* Caller holds RTNL or dev_base_lock */ |
4ec93edb | 37 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 38 | { |
fe9925b5 | 39 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
40 | } |
41 | ||
42 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
43 | static ssize_t netdev_show(const struct device *dev, |
44 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
45 | ssize_t (*format)(const struct net_device *, char *)) |
46 | { | |
6b53dafe | 47 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
48 | ssize_t ret = -EINVAL; |
49 | ||
50 | read_lock(&dev_base_lock); | |
6b53dafe WC |
51 | if (dev_isalive(ndev)) |
52 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
53 | read_unlock(&dev_base_lock); |
54 | ||
55 | return ret; | |
56 | } | |
57 | ||
58 | /* generate a show function for simple field */ | |
59 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 60 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 61 | { \ |
73c2e90a | 62 | return sysfs_emit(buf, format_string, dev->field); \ |
1da177e4 | 63 | } \ |
6be8aeef | 64 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 65 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 66 | { \ |
43cb76d9 | 67 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
68 | } \ |
69 | ||
70 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
71 | NETDEVICE_SHOW(field, format_string); \ | |
72 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 73 | |
6be8aeef GKH |
74 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
75 | NETDEVICE_SHOW(field, format_string); \ | |
76 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
77 | |
78 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 79 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
80 | const char *buf, size_t len, |
81 | int (*set)(struct net_device *, unsigned long)) | |
82 | { | |
5e1fccc0 EB |
83 | struct net_device *netdev = to_net_dev(dev); |
84 | struct net *net = dev_net(netdev); | |
1da177e4 | 85 | unsigned long new; |
5f0224a6 | 86 | int ret; |
1da177e4 | 87 | |
5e1fccc0 | 88 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
89 | return -EPERM; |
90 | ||
e1e420c7 SK |
91 | ret = kstrtoul(buf, 0, &new); |
92 | if (ret) | |
1da177e4 LT |
93 | goto err; |
94 | ||
5a5990d3 | 95 | if (!rtnl_trylock()) |
336ca57c | 96 | return restart_syscall(); |
5a5990d3 | 97 | |
5e1fccc0 | 98 | if (dev_isalive(netdev)) { |
6648c65e | 99 | ret = (*set)(netdev, new); |
100 | if (ret == 0) | |
1da177e4 LT |
101 | ret = len; |
102 | } | |
103 | rtnl_unlock(); | |
104 | err: | |
105 | return ret; | |
106 | } | |
107 | ||
6be8aeef | 108 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 109 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
110 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
111 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
6be8aeef GKH |
112 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); |
113 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
114 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 | 115 | |
a54acb3a ND |
116 | static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, |
117 | char *buf) | |
118 | { | |
119 | struct net_device *ndev = to_net_dev(dev); | |
120 | ||
73c2e90a | 121 | return sysfs_emit(buf, fmt_dec, dev_get_iflink(ndev)); |
a54acb3a ND |
122 | } |
123 | static DEVICE_ATTR_RO(iflink); | |
124 | ||
6b53dafe | 125 | static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) |
685343fc | 126 | { |
73c2e90a | 127 | return sysfs_emit(buf, fmt_dec, dev->name_assign_type); |
685343fc TG |
128 | } |
129 | ||
130 | static ssize_t name_assign_type_show(struct device *dev, | |
131 | struct device_attribute *attr, | |
132 | char *buf) | |
133 | { | |
6b53dafe | 134 | struct net_device *ndev = to_net_dev(dev); |
685343fc TG |
135 | ssize_t ret = -EINVAL; |
136 | ||
6b53dafe | 137 | if (ndev->name_assign_type != NET_NAME_UNKNOWN) |
685343fc TG |
138 | ret = netdev_show(dev, attr, buf, format_name_assign_type); |
139 | ||
140 | return ret; | |
141 | } | |
142 | static DEVICE_ATTR_RO(name_assign_type); | |
143 | ||
1da177e4 | 144 | /* use same locking rules as GIFHWADDR ioctl's */ |
6be8aeef | 145 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 146 | char *buf) |
1da177e4 | 147 | { |
6b53dafe | 148 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
149 | ssize_t ret = -EINVAL; |
150 | ||
151 | read_lock(&dev_base_lock); | |
6b53dafe WC |
152 | if (dev_isalive(ndev)) |
153 | ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); | |
1da177e4 LT |
154 | read_unlock(&dev_base_lock); |
155 | return ret; | |
156 | } | |
6be8aeef | 157 | static DEVICE_ATTR_RO(address); |
1da177e4 | 158 | |
6be8aeef GKH |
159 | static ssize_t broadcast_show(struct device *dev, |
160 | struct device_attribute *attr, char *buf) | |
1da177e4 | 161 | { |
6b53dafe | 162 | struct net_device *ndev = to_net_dev(dev); |
6648c65e | 163 | |
6b53dafe WC |
164 | if (dev_isalive(ndev)) |
165 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
166 | return -EINVAL; |
167 | } | |
6be8aeef | 168 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 169 | |
6b53dafe | 170 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 171 | { |
6b53dafe | 172 | if (!netif_running(dev)) |
fdae0fde | 173 | return -EINVAL; |
6648c65e | 174 | return dev_change_carrier(dev, (bool)new_carrier); |
fdae0fde JP |
175 | } |
176 | ||
6be8aeef GKH |
177 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
178 | const char *buf, size_t len) | |
fdae0fde | 179 | { |
146e5e73 AT |
180 | struct net_device *netdev = to_net_dev(dev); |
181 | ||
182 | /* The check is also done in change_carrier; this helps returning early | |
183 | * without hitting the trylock/restart in netdev_store. | |
184 | */ | |
185 | if (!netdev->netdev_ops->ndo_change_carrier) | |
186 | return -EOPNOTSUPP; | |
187 | ||
fdae0fde JP |
188 | return netdev_store(dev, attr, buf, len, change_carrier); |
189 | } | |
190 | ||
6be8aeef | 191 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 192 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
193 | { |
194 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 195 | |
196 | if (netif_running(netdev)) | |
73c2e90a | 197 | return sysfs_emit(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
6648c65e | 198 | |
1da177e4 LT |
199 | return -EINVAL; |
200 | } | |
6be8aeef | 201 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 202 | |
6be8aeef | 203 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
204 | struct device_attribute *attr, char *buf) |
205 | { | |
206 | struct net_device *netdev = to_net_dev(dev); | |
207 | int ret = -EINVAL; | |
208 | ||
146e5e73 AT |
209 | /* The check is also done in __ethtool_get_link_ksettings; this helps |
210 | * returning early without hitting the trylock/restart below. | |
211 | */ | |
212 | if (!netdev->ethtool_ops->get_link_ksettings) | |
213 | return ret; | |
214 | ||
d519e17e AG |
215 | if (!rtnl_trylock()) |
216 | return restart_syscall(); | |
217 | ||
4224cfd7 | 218 | if (netif_running(netdev) && netif_device_present(netdev)) { |
7cad1bac DD |
219 | struct ethtool_link_ksettings cmd; |
220 | ||
221 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) | |
73c2e90a | 222 | ret = sysfs_emit(buf, fmt_dec, cmd.base.speed); |
d519e17e AG |
223 | } |
224 | rtnl_unlock(); | |
225 | return ret; | |
226 | } | |
6be8aeef | 227 | static DEVICE_ATTR_RO(speed); |
d519e17e | 228 | |
6be8aeef | 229 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
230 | struct device_attribute *attr, char *buf) |
231 | { | |
232 | struct net_device *netdev = to_net_dev(dev); | |
233 | int ret = -EINVAL; | |
234 | ||
146e5e73 AT |
235 | /* The check is also done in __ethtool_get_link_ksettings; this helps |
236 | * returning early without hitting the trylock/restart below. | |
237 | */ | |
238 | if (!netdev->ethtool_ops->get_link_ksettings) | |
239 | return ret; | |
240 | ||
d519e17e AG |
241 | if (!rtnl_trylock()) |
242 | return restart_syscall(); | |
243 | ||
8ae6daca | 244 | if (netif_running(netdev)) { |
7cad1bac DD |
245 | struct ethtool_link_ksettings cmd; |
246 | ||
247 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) { | |
c6c13965 | 248 | const char *duplex; |
7cad1bac DD |
249 | |
250 | switch (cmd.base.duplex) { | |
c6c13965 NA |
251 | case DUPLEX_HALF: |
252 | duplex = "half"; | |
253 | break; | |
254 | case DUPLEX_FULL: | |
255 | duplex = "full"; | |
256 | break; | |
257 | default: | |
258 | duplex = "unknown"; | |
259 | break; | |
260 | } | |
73c2e90a | 261 | ret = sysfs_emit(buf, "%s\n", duplex); |
c6c13965 | 262 | } |
d519e17e AG |
263 | } |
264 | rtnl_unlock(); | |
265 | return ret; | |
266 | } | |
6be8aeef | 267 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 268 | |
db30a577 AL |
269 | static ssize_t testing_show(struct device *dev, |
270 | struct device_attribute *attr, char *buf) | |
271 | { | |
272 | struct net_device *netdev = to_net_dev(dev); | |
273 | ||
274 | if (netif_running(netdev)) | |
73c2e90a | 275 | return sysfs_emit(buf, fmt_dec, !!netif_testing(netdev)); |
db30a577 AL |
276 | |
277 | return -EINVAL; | |
278 | } | |
279 | static DEVICE_ATTR_RO(testing); | |
280 | ||
6be8aeef | 281 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 282 | struct device_attribute *attr, char *buf) |
b00055aa SR |
283 | { |
284 | struct net_device *netdev = to_net_dev(dev); | |
285 | ||
286 | if (netif_running(netdev)) | |
73c2e90a | 287 | return sysfs_emit(buf, fmt_dec, !!netif_dormant(netdev)); |
b00055aa SR |
288 | |
289 | return -EINVAL; | |
290 | } | |
6be8aeef | 291 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 292 | |
36cbd3dc | 293 | static const char *const operstates[] = { |
b00055aa SR |
294 | "unknown", |
295 | "notpresent", /* currently unused */ | |
296 | "down", | |
297 | "lowerlayerdown", | |
db30a577 | 298 | "testing", |
b00055aa SR |
299 | "dormant", |
300 | "up" | |
301 | }; | |
302 | ||
6be8aeef | 303 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 304 | struct device_attribute *attr, char *buf) |
b00055aa SR |
305 | { |
306 | const struct net_device *netdev = to_net_dev(dev); | |
307 | unsigned char operstate; | |
308 | ||
309 | read_lock(&dev_base_lock); | |
310 | operstate = netdev->operstate; | |
311 | if (!netif_running(netdev)) | |
312 | operstate = IF_OPER_DOWN; | |
313 | read_unlock(&dev_base_lock); | |
314 | ||
e3a5cd9e | 315 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
316 | return -EINVAL; /* should not happen */ |
317 | ||
73c2e90a | 318 | return sysfs_emit(buf, "%s\n", operstates[operstate]); |
b00055aa | 319 | } |
6be8aeef | 320 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 321 | |
2d3b479d | 322 | static ssize_t carrier_changes_show(struct device *dev, |
323 | struct device_attribute *attr, | |
324 | char *buf) | |
325 | { | |
326 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 327 | |
73c2e90a WY |
328 | return sysfs_emit(buf, fmt_dec, |
329 | atomic_read(&netdev->carrier_up_count) + | |
330 | atomic_read(&netdev->carrier_down_count)); | |
2d3b479d | 331 | } |
332 | static DEVICE_ATTR_RO(carrier_changes); | |
333 | ||
b2d3bcfa DD |
334 | static ssize_t carrier_up_count_show(struct device *dev, |
335 | struct device_attribute *attr, | |
336 | char *buf) | |
337 | { | |
338 | struct net_device *netdev = to_net_dev(dev); | |
339 | ||
73c2e90a | 340 | return sysfs_emit(buf, fmt_dec, atomic_read(&netdev->carrier_up_count)); |
b2d3bcfa DD |
341 | } |
342 | static DEVICE_ATTR_RO(carrier_up_count); | |
343 | ||
344 | static ssize_t carrier_down_count_show(struct device *dev, | |
345 | struct device_attribute *attr, | |
346 | char *buf) | |
347 | { | |
348 | struct net_device *netdev = to_net_dev(dev); | |
349 | ||
73c2e90a | 350 | return sysfs_emit(buf, fmt_dec, atomic_read(&netdev->carrier_down_count)); |
b2d3bcfa DD |
351 | } |
352 | static DEVICE_ATTR_RO(carrier_down_count); | |
353 | ||
1da177e4 | 354 | /* read-write attributes */ |
1da177e4 | 355 | |
6b53dafe | 356 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 357 | { |
6648c65e | 358 | return dev_set_mtu(dev, (int)new_mtu); |
1da177e4 LT |
359 | } |
360 | ||
6be8aeef | 361 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 362 | const char *buf, size_t len) |
1da177e4 | 363 | { |
43cb76d9 | 364 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 365 | } |
6be8aeef | 366 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 367 | |
6b53dafe | 368 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 369 | { |
567c5e13 | 370 | return dev_change_flags(dev, (unsigned int)new_flags, NULL); |
1da177e4 LT |
371 | } |
372 | ||
6be8aeef | 373 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 374 | const char *buf, size_t len) |
1da177e4 | 375 | { |
43cb76d9 | 376 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 377 | } |
6be8aeef | 378 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 379 | |
6be8aeef | 380 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
381 | struct device_attribute *attr, |
382 | const char *buf, size_t len) | |
1da177e4 | 383 | { |
5e1fccc0 EB |
384 | if (!capable(CAP_NET_ADMIN)) |
385 | return -EPERM; | |
386 | ||
6a643ddb | 387 | return netdev_store(dev, attr, buf, len, dev_change_tx_queue_len); |
1da177e4 | 388 | } |
0cd29503 | 389 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec); |
1da177e4 | 390 | |
3b47d303 ED |
391 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
392 | { | |
7e417a66 | 393 | WRITE_ONCE(dev->gro_flush_timeout, val); |
3b47d303 ED |
394 | return 0; |
395 | } | |
396 | ||
397 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
6648c65e | 398 | struct device_attribute *attr, |
399 | const char *buf, size_t len) | |
3b47d303 ED |
400 | { |
401 | if (!capable(CAP_NET_ADMIN)) | |
402 | return -EPERM; | |
403 | ||
404 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
405 | } | |
406 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
407 | ||
6f8b12d6 ED |
408 | static int change_napi_defer_hard_irqs(struct net_device *dev, unsigned long val) |
409 | { | |
7e417a66 | 410 | WRITE_ONCE(dev->napi_defer_hard_irqs, val); |
6f8b12d6 ED |
411 | return 0; |
412 | } | |
413 | ||
414 | static ssize_t napi_defer_hard_irqs_store(struct device *dev, | |
415 | struct device_attribute *attr, | |
416 | const char *buf, size_t len) | |
417 | { | |
418 | if (!capable(CAP_NET_ADMIN)) | |
419 | return -EPERM; | |
420 | ||
421 | return netdev_store(dev, attr, buf, len, change_napi_defer_hard_irqs); | |
422 | } | |
423 | NETDEVICE_SHOW_RW(napi_defer_hard_irqs, fmt_dec); | |
424 | ||
6be8aeef | 425 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
426 | const char *buf, size_t len) |
427 | { | |
428 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 429 | struct net *net = dev_net(netdev); |
0b815a1a | 430 | size_t count = len; |
c92eb77a | 431 | ssize_t ret = 0; |
0b815a1a | 432 | |
5e1fccc0 | 433 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
434 | return -EPERM; |
435 | ||
436 | /* ignore trailing newline */ | |
437 | if (len > 0 && buf[len - 1] == '\n') | |
438 | --count; | |
439 | ||
c92eb77a RP |
440 | if (!rtnl_trylock()) |
441 | return restart_syscall(); | |
0b815a1a | 442 | |
c92eb77a RP |
443 | if (dev_isalive(netdev)) { |
444 | ret = dev_set_alias(netdev, buf, count); | |
445 | if (ret < 0) | |
446 | goto err; | |
447 | ret = len; | |
448 | netdev_state_change(netdev); | |
449 | } | |
450 | err: | |
451 | rtnl_unlock(); | |
452 | ||
453 | return ret; | |
0b815a1a SH |
454 | } |
455 | ||
6be8aeef | 456 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
457 | struct device_attribute *attr, char *buf) |
458 | { | |
459 | const struct net_device *netdev = to_net_dev(dev); | |
6c557001 | 460 | char tmp[IFALIASZ]; |
0b815a1a SH |
461 | ssize_t ret = 0; |
462 | ||
6c557001 FW |
463 | ret = dev_get_alias(netdev, tmp, sizeof(tmp)); |
464 | if (ret > 0) | |
73c2e90a | 465 | ret = sysfs_emit(buf, "%s\n", tmp); |
0b815a1a SH |
466 | return ret; |
467 | } | |
6be8aeef | 468 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 469 | |
6b53dafe | 470 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 471 | { |
6648c65e | 472 | dev_set_group(dev, (int)new_group); |
a512b92b VD |
473 | return 0; |
474 | } | |
475 | ||
6be8aeef GKH |
476 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
477 | const char *buf, size_t len) | |
a512b92b VD |
478 | { |
479 | return netdev_store(dev, attr, buf, len, change_group); | |
480 | } | |
6be8aeef | 481 | NETDEVICE_SHOW(group, fmt_dec); |
d6444062 | 482 | static DEVICE_ATTR(netdev_group, 0644, group_show, group_store); |
6be8aeef | 483 | |
d746d707 AK |
484 | static int change_proto_down(struct net_device *dev, unsigned long proto_down) |
485 | { | |
6648c65e | 486 | return dev_change_proto_down(dev, (bool)proto_down); |
d746d707 AK |
487 | } |
488 | ||
489 | static ssize_t proto_down_store(struct device *dev, | |
490 | struct device_attribute *attr, | |
491 | const char *buf, size_t len) | |
492 | { | |
493 | return netdev_store(dev, attr, buf, len, change_proto_down); | |
494 | } | |
495 | NETDEVICE_SHOW_RW(proto_down, fmt_dec); | |
496 | ||
cc998ff8 | 497 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
498 | struct device_attribute *attr, char *buf) |
499 | { | |
500 | struct net_device *netdev = to_net_dev(dev); | |
501 | ssize_t ret = -EINVAL; | |
502 | ||
146e5e73 AT |
503 | /* The check is also done in dev_get_phys_port_id; this helps returning |
504 | * early without hitting the trylock/restart below. | |
505 | */ | |
506 | if (!netdev->netdev_ops->ndo_get_phys_port_id) | |
507 | return -EOPNOTSUPP; | |
508 | ||
ff80e519 JP |
509 | if (!rtnl_trylock()) |
510 | return restart_syscall(); | |
511 | ||
512 | if (dev_isalive(netdev)) { | |
02637fce | 513 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
514 | |
515 | ret = dev_get_phys_port_id(netdev, &ppid); | |
516 | if (!ret) | |
73c2e90a | 517 | ret = sysfs_emit(buf, "%*phN\n", ppid.id_len, ppid.id); |
ff80e519 JP |
518 | } |
519 | rtnl_unlock(); | |
520 | ||
521 | return ret; | |
522 | } | |
cc998ff8 LT |
523 | static DEVICE_ATTR_RO(phys_port_id); |
524 | ||
db24a904 DA |
525 | static ssize_t phys_port_name_show(struct device *dev, |
526 | struct device_attribute *attr, char *buf) | |
527 | { | |
528 | struct net_device *netdev = to_net_dev(dev); | |
529 | ssize_t ret = -EINVAL; | |
530 | ||
146e5e73 AT |
531 | /* The checks are also done in dev_get_phys_port_name; this helps |
532 | * returning early without hitting the trylock/restart below. | |
533 | */ | |
534 | if (!netdev->netdev_ops->ndo_get_phys_port_name && | |
8eba37f7 | 535 | !netdev->devlink_port) |
146e5e73 AT |
536 | return -EOPNOTSUPP; |
537 | ||
db24a904 DA |
538 | if (!rtnl_trylock()) |
539 | return restart_syscall(); | |
540 | ||
541 | if (dev_isalive(netdev)) { | |
542 | char name[IFNAMSIZ]; | |
543 | ||
544 | ret = dev_get_phys_port_name(netdev, name, sizeof(name)); | |
545 | if (!ret) | |
73c2e90a | 546 | ret = sysfs_emit(buf, "%s\n", name); |
db24a904 DA |
547 | } |
548 | rtnl_unlock(); | |
549 | ||
550 | return ret; | |
551 | } | |
552 | static DEVICE_ATTR_RO(phys_port_name); | |
553 | ||
aecbe01e JP |
554 | static ssize_t phys_switch_id_show(struct device *dev, |
555 | struct device_attribute *attr, char *buf) | |
556 | { | |
557 | struct net_device *netdev = to_net_dev(dev); | |
558 | ssize_t ret = -EINVAL; | |
559 | ||
146e5e73 AT |
560 | /* The checks are also done in dev_get_phys_port_name; this helps |
561 | * returning early without hitting the trylock/restart below. This works | |
562 | * because recurse is false when calling dev_get_port_parent_id. | |
563 | */ | |
564 | if (!netdev->netdev_ops->ndo_get_port_parent_id && | |
8eba37f7 | 565 | !netdev->devlink_port) |
146e5e73 AT |
566 | return -EOPNOTSUPP; |
567 | ||
aecbe01e JP |
568 | if (!rtnl_trylock()) |
569 | return restart_syscall(); | |
570 | ||
571 | if (dev_isalive(netdev)) { | |
bccb3025 FF |
572 | struct netdev_phys_item_id ppid = { }; |
573 | ||
574 | ret = dev_get_port_parent_id(netdev, &ppid, false); | |
aecbe01e | 575 | if (!ret) |
73c2e90a | 576 | ret = sysfs_emit(buf, "%*phN\n", ppid.id_len, ppid.id); |
aecbe01e JP |
577 | } |
578 | rtnl_unlock(); | |
579 | ||
580 | return ret; | |
581 | } | |
582 | static DEVICE_ATTR_RO(phys_switch_id); | |
583 | ||
5fdd2f0e WW |
584 | static ssize_t threaded_show(struct device *dev, |
585 | struct device_attribute *attr, char *buf) | |
586 | { | |
587 | struct net_device *netdev = to_net_dev(dev); | |
588 | ssize_t ret = -EINVAL; | |
589 | ||
590 | if (!rtnl_trylock()) | |
591 | return restart_syscall(); | |
592 | ||
593 | if (dev_isalive(netdev)) | |
73c2e90a | 594 | ret = sysfs_emit(buf, fmt_dec, netdev->threaded); |
5fdd2f0e WW |
595 | |
596 | rtnl_unlock(); | |
597 | return ret; | |
598 | } | |
599 | ||
600 | static int modify_napi_threaded(struct net_device *dev, unsigned long val) | |
601 | { | |
602 | int ret; | |
603 | ||
604 | if (list_empty(&dev->napi_list)) | |
605 | return -EOPNOTSUPP; | |
606 | ||
607 | if (val != 0 && val != 1) | |
608 | return -EOPNOTSUPP; | |
609 | ||
610 | ret = dev_set_threaded(dev, val); | |
611 | ||
612 | return ret; | |
613 | } | |
614 | ||
615 | static ssize_t threaded_store(struct device *dev, | |
616 | struct device_attribute *attr, | |
617 | const char *buf, size_t len) | |
618 | { | |
619 | return netdev_store(dev, attr, buf, len, modify_napi_threaded); | |
620 | } | |
621 | static DEVICE_ATTR_RW(threaded); | |
622 | ||
ec6cc599 | 623 | static struct attribute *net_class_attrs[] __ro_after_init = { |
6be8aeef GKH |
624 | &dev_attr_netdev_group.attr, |
625 | &dev_attr_type.attr, | |
626 | &dev_attr_dev_id.attr, | |
3f85944f | 627 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
628 | &dev_attr_iflink.attr, |
629 | &dev_attr_ifindex.attr, | |
685343fc | 630 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
631 | &dev_attr_addr_assign_type.attr, |
632 | &dev_attr_addr_len.attr, | |
633 | &dev_attr_link_mode.attr, | |
634 | &dev_attr_address.attr, | |
635 | &dev_attr_broadcast.attr, | |
636 | &dev_attr_speed.attr, | |
637 | &dev_attr_duplex.attr, | |
638 | &dev_attr_dormant.attr, | |
db30a577 | 639 | &dev_attr_testing.attr, |
6be8aeef | 640 | &dev_attr_operstate.attr, |
2d3b479d | 641 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
642 | &dev_attr_ifalias.attr, |
643 | &dev_attr_carrier.attr, | |
644 | &dev_attr_mtu.attr, | |
645 | &dev_attr_flags.attr, | |
646 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 647 | &dev_attr_gro_flush_timeout.attr, |
6f8b12d6 | 648 | &dev_attr_napi_defer_hard_irqs.attr, |
cc998ff8 | 649 | &dev_attr_phys_port_id.attr, |
db24a904 | 650 | &dev_attr_phys_port_name.attr, |
aecbe01e | 651 | &dev_attr_phys_switch_id.attr, |
d746d707 | 652 | &dev_attr_proto_down.attr, |
b2d3bcfa DD |
653 | &dev_attr_carrier_up_count.attr, |
654 | &dev_attr_carrier_down_count.attr, | |
5fdd2f0e | 655 | &dev_attr_threaded.attr, |
6be8aeef | 656 | NULL, |
1da177e4 | 657 | }; |
6be8aeef | 658 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
659 | |
660 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
661 | static ssize_t netstat_show(const struct device *d, |
662 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
663 | unsigned long offset) |
664 | { | |
43cb76d9 | 665 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
666 | ssize_t ret = -EINVAL; |
667 | ||
be1f3c2c | 668 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
6648c65e | 669 | offset % sizeof(u64) != 0); |
1da177e4 LT |
670 | |
671 | read_lock(&dev_base_lock); | |
96e74088 | 672 | if (dev_isalive(dev)) { |
28172739 ED |
673 | struct rtnl_link_stats64 temp; |
674 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
675 | ||
73c2e90a | 676 | ret = sysfs_emit(buf, fmt_u64, *(u64 *)(((u8 *)stats) + offset)); |
96e74088 | 677 | } |
1da177e4 LT |
678 | read_unlock(&dev_base_lock); |
679 | return ret; | |
680 | } | |
681 | ||
682 | /* generate a read-only statistics attribute */ | |
683 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 684 | static ssize_t name##_show(struct device *d, \ |
6648c65e | 685 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 686 | { \ |
43cb76d9 | 687 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 688 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 689 | } \ |
6be8aeef | 690 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
691 | |
692 | NETSTAT_ENTRY(rx_packets); | |
693 | NETSTAT_ENTRY(tx_packets); | |
694 | NETSTAT_ENTRY(rx_bytes); | |
695 | NETSTAT_ENTRY(tx_bytes); | |
696 | NETSTAT_ENTRY(rx_errors); | |
697 | NETSTAT_ENTRY(tx_errors); | |
698 | NETSTAT_ENTRY(rx_dropped); | |
699 | NETSTAT_ENTRY(tx_dropped); | |
700 | NETSTAT_ENTRY(multicast); | |
701 | NETSTAT_ENTRY(collisions); | |
702 | NETSTAT_ENTRY(rx_length_errors); | |
703 | NETSTAT_ENTRY(rx_over_errors); | |
704 | NETSTAT_ENTRY(rx_crc_errors); | |
705 | NETSTAT_ENTRY(rx_frame_errors); | |
706 | NETSTAT_ENTRY(rx_fifo_errors); | |
707 | NETSTAT_ENTRY(rx_missed_errors); | |
708 | NETSTAT_ENTRY(tx_aborted_errors); | |
709 | NETSTAT_ENTRY(tx_carrier_errors); | |
710 | NETSTAT_ENTRY(tx_fifo_errors); | |
711 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
712 | NETSTAT_ENTRY(tx_window_errors); | |
713 | NETSTAT_ENTRY(rx_compressed); | |
714 | NETSTAT_ENTRY(tx_compressed); | |
6e7333d3 | 715 | NETSTAT_ENTRY(rx_nohandler); |
1da177e4 | 716 | |
ec6cc599 | 717 | static struct attribute *netstat_attrs[] __ro_after_init = { |
43cb76d9 GKH |
718 | &dev_attr_rx_packets.attr, |
719 | &dev_attr_tx_packets.attr, | |
720 | &dev_attr_rx_bytes.attr, | |
721 | &dev_attr_tx_bytes.attr, | |
722 | &dev_attr_rx_errors.attr, | |
723 | &dev_attr_tx_errors.attr, | |
724 | &dev_attr_rx_dropped.attr, | |
725 | &dev_attr_tx_dropped.attr, | |
726 | &dev_attr_multicast.attr, | |
727 | &dev_attr_collisions.attr, | |
728 | &dev_attr_rx_length_errors.attr, | |
729 | &dev_attr_rx_over_errors.attr, | |
730 | &dev_attr_rx_crc_errors.attr, | |
731 | &dev_attr_rx_frame_errors.attr, | |
732 | &dev_attr_rx_fifo_errors.attr, | |
733 | &dev_attr_rx_missed_errors.attr, | |
734 | &dev_attr_tx_aborted_errors.attr, | |
735 | &dev_attr_tx_carrier_errors.attr, | |
736 | &dev_attr_tx_fifo_errors.attr, | |
737 | &dev_attr_tx_heartbeat_errors.attr, | |
738 | &dev_attr_tx_window_errors.attr, | |
739 | &dev_attr_rx_compressed.attr, | |
740 | &dev_attr_tx_compressed.attr, | |
6e7333d3 | 741 | &dev_attr_rx_nohandler.attr, |
1da177e4 LT |
742 | NULL |
743 | }; | |
744 | ||
38ef00cc | 745 | static const struct attribute_group netstat_group = { |
1da177e4 LT |
746 | .name = "statistics", |
747 | .attrs = netstat_attrs, | |
748 | }; | |
38c1a01c | 749 | |
38c1a01c JB |
750 | static struct attribute *wireless_attrs[] = { |
751 | NULL | |
752 | }; | |
753 | ||
38ef00cc | 754 | static const struct attribute_group wireless_group = { |
38c1a01c JB |
755 | .name = "wireless", |
756 | .attrs = wireless_attrs, | |
757 | }; | |
c304eddc JK |
758 | |
759 | static bool wireless_group_needed(struct net_device *ndev) | |
760 | { | |
761 | #if IS_ENABLED(CONFIG_CFG80211) | |
762 | if (ndev->ieee80211_ptr) | |
763 | return true; | |
38c1a01c | 764 | #endif |
c304eddc JK |
765 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) |
766 | if (ndev->wireless_handlers) | |
767 | return true; | |
768 | #endif | |
769 | return false; | |
770 | } | |
6be8aeef GKH |
771 | |
772 | #else /* CONFIG_SYSFS */ | |
773 | #define net_class_groups NULL | |
d6523ddf | 774 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 775 | |
a953be53 | 776 | #ifdef CONFIG_SYSFS |
6648c65e | 777 | #define to_rx_queue_attr(_attr) \ |
778 | container_of(_attr, struct rx_queue_attribute, attr) | |
0a9627f2 TH |
779 | |
780 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
781 | ||
782 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
783 | char *buf) | |
784 | { | |
667e427b | 785 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
786 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
787 | ||
788 | if (!attribute->show) | |
789 | return -EIO; | |
790 | ||
718ad681 | 791 | return attribute->show(queue, buf); |
0a9627f2 TH |
792 | } |
793 | ||
794 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
795 | const char *buf, size_t count) | |
796 | { | |
667e427b | 797 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
798 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
799 | ||
800 | if (!attribute->store) | |
801 | return -EIO; | |
802 | ||
718ad681 | 803 | return attribute->store(queue, buf, count); |
0a9627f2 TH |
804 | } |
805 | ||
fa50d645 | 806 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
807 | .show = rx_queue_attr_show, |
808 | .store = rx_queue_attr_store, | |
809 | }; | |
810 | ||
a953be53 | 811 | #ifdef CONFIG_RPS |
718ad681 | 812 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf) |
0a9627f2 TH |
813 | { |
814 | struct rps_map *map; | |
815 | cpumask_var_t mask; | |
f0906827 | 816 | int i, len; |
0a9627f2 TH |
817 | |
818 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
819 | return -ENOMEM; | |
820 | ||
821 | rcu_read_lock(); | |
822 | map = rcu_dereference(queue->rps_map); | |
823 | if (map) | |
824 | for (i = 0; i < map->len; i++) | |
825 | cpumask_set_cpu(map->cpus[i], mask); | |
826 | ||
73c2e90a | 827 | len = sysfs_emit(buf, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 828 | rcu_read_unlock(); |
0a9627f2 | 829 | free_cpumask_var(mask); |
f0906827 TH |
830 | |
831 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
832 | } |
833 | ||
370ca718 PA |
834 | static int netdev_rx_queue_set_rps_mask(struct netdev_rx_queue *queue, |
835 | cpumask_var_t mask) | |
0a9627f2 | 836 | { |
da65ad1f | 837 | static DEFINE_MUTEX(rps_map_mutex); |
370ca718 PA |
838 | struct rps_map *old_map, *map; |
839 | int cpu, i; | |
07bbecb3 | 840 | |
95c96174 | 841 | map = kzalloc(max_t(unsigned int, |
6648c65e | 842 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
843 | GFP_KERNEL); | |
370ca718 | 844 | if (!map) |
0a9627f2 | 845 | return -ENOMEM; |
0a9627f2 TH |
846 | |
847 | i = 0; | |
848 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
849 | map->cpus[i++] = cpu; | |
850 | ||
6648c65e | 851 | if (i) { |
0a9627f2 | 852 | map->len = i; |
6648c65e | 853 | } else { |
0a9627f2 TH |
854 | kfree(map); |
855 | map = NULL; | |
856 | } | |
857 | ||
da65ad1f | 858 | mutex_lock(&rps_map_mutex); |
6e3f7faf | 859 | old_map = rcu_dereference_protected(queue->rps_map, |
da65ad1f | 860 | mutex_is_locked(&rps_map_mutex)); |
0a9627f2 | 861 | rcu_assign_pointer(queue->rps_map, map); |
0a9627f2 | 862 | |
adc9300e | 863 | if (map) |
dc05360f | 864 | static_branch_inc(&rps_needed); |
10e4ea75 | 865 | if (old_map) |
dc05360f | 866 | static_branch_dec(&rps_needed); |
10e4ea75 | 867 | |
da65ad1f | 868 | mutex_unlock(&rps_map_mutex); |
10e4ea75 TH |
869 | |
870 | if (old_map) | |
871 | kfree_rcu(old_map, rcu); | |
370ca718 PA |
872 | return 0; |
873 | } | |
874 | ||
875 | int rps_cpumask_housekeeping(struct cpumask *mask) | |
876 | { | |
877 | if (!cpumask_empty(mask)) { | |
878 | cpumask_and(mask, mask, housekeeping_cpumask(HK_TYPE_DOMAIN)); | |
879 | cpumask_and(mask, mask, housekeeping_cpumask(HK_TYPE_WQ)); | |
880 | if (cpumask_empty(mask)) | |
881 | return -EINVAL; | |
882 | } | |
883 | return 0; | |
884 | } | |
885 | ||
886 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, | |
887 | const char *buf, size_t len) | |
888 | { | |
889 | cpumask_var_t mask; | |
890 | int err; | |
891 | ||
892 | if (!capable(CAP_NET_ADMIN)) | |
893 | return -EPERM; | |
894 | ||
895 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
896 | return -ENOMEM; | |
897 | ||
898 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
899 | if (err) | |
900 | goto out; | |
901 | ||
902 | err = rps_cpumask_housekeeping(mask); | |
903 | if (err) | |
904 | goto out; | |
905 | ||
906 | err = netdev_rx_queue_set_rps_mask(queue, mask); | |
10e4ea75 | 907 | |
370ca718 | 908 | out: |
0a9627f2 | 909 | free_cpumask_var(mask); |
370ca718 | 910 | return err ? : len; |
0a9627f2 TH |
911 | } |
912 | ||
fec5e652 | 913 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
914 | char *buf) |
915 | { | |
916 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 917 | unsigned long val = 0; |
fec5e652 TH |
918 | |
919 | rcu_read_lock(); | |
920 | flow_table = rcu_dereference(queue->rps_flow_table); | |
921 | if (flow_table) | |
60b778ce | 922 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
923 | rcu_read_unlock(); |
924 | ||
73c2e90a | 925 | return sysfs_emit(buf, "%lu\n", val); |
fec5e652 TH |
926 | } |
927 | ||
fec5e652 TH |
928 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
929 | { | |
930 | struct rps_dev_flow_table *table = container_of(rcu, | |
931 | struct rps_dev_flow_table, rcu); | |
243198d0 | 932 | vfree(table); |
fec5e652 TH |
933 | } |
934 | ||
f5acb907 | 935 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
718ad681 | 936 | const char *buf, size_t len) |
fec5e652 | 937 | { |
60b778ce | 938 | unsigned long mask, count; |
fec5e652 TH |
939 | struct rps_dev_flow_table *table, *old_table; |
940 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 941 | int rc; |
fec5e652 TH |
942 | |
943 | if (!capable(CAP_NET_ADMIN)) | |
944 | return -EPERM; | |
945 | ||
60b778ce ED |
946 | rc = kstrtoul(buf, 0, &count); |
947 | if (rc < 0) | |
948 | return rc; | |
fec5e652 TH |
949 | |
950 | if (count) { | |
60b778ce ED |
951 | mask = count - 1; |
952 | /* mask = roundup_pow_of_two(count) - 1; | |
953 | * without overflows... | |
954 | */ | |
955 | while ((mask | (mask >> 1)) != mask) | |
956 | mask |= (mask >> 1); | |
957 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 958 | * and on 32bit arches, must check |
959 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
960 | */ |
961 | #if BITS_PER_LONG > 32 | |
962 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 963 | return -EINVAL; |
60b778ce ED |
964 | #else |
965 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 966 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
967 | /* Enforce a limit to prevent overflow */ |
968 | return -EINVAL; | |
969 | } | |
60b778ce ED |
970 | #endif |
971 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
972 | if (!table) |
973 | return -ENOMEM; | |
974 | ||
60b778ce ED |
975 | table->mask = mask; |
976 | for (count = 0; count <= mask; count++) | |
977 | table->flows[count].cpu = RPS_NO_CPU; | |
6648c65e | 978 | } else { |
fec5e652 | 979 | table = NULL; |
6648c65e | 980 | } |
fec5e652 TH |
981 | |
982 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
983 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
984 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
985 | rcu_assign_pointer(queue->rps_flow_table, table); |
986 | spin_unlock(&rps_dev_flow_lock); | |
987 | ||
988 | if (old_table) | |
989 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
990 | ||
991 | return len; | |
992 | } | |
993 | ||
667e427b | 994 | static struct rx_queue_attribute rps_cpus_attribute __ro_after_init |
d6444062 | 995 | = __ATTR(rps_cpus, 0644, show_rps_map, store_rps_map); |
0a9627f2 | 996 | |
667e427b | 997 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute __ro_after_init |
d6444062 | 998 | = __ATTR(rps_flow_cnt, 0644, |
667e427b | 999 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); |
a953be53 | 1000 | #endif /* CONFIG_RPS */ |
fec5e652 | 1001 | |
667e427b | 1002 | static struct attribute *rx_queue_default_attrs[] __ro_after_init = { |
a953be53 | 1003 | #ifdef CONFIG_RPS |
0a9627f2 | 1004 | &rps_cpus_attribute.attr, |
fec5e652 | 1005 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 1006 | #endif |
0a9627f2 TH |
1007 | NULL |
1008 | }; | |
be0d6926 | 1009 | ATTRIBUTE_GROUPS(rx_queue_default); |
0a9627f2 TH |
1010 | |
1011 | static void rx_queue_release(struct kobject *kobj) | |
1012 | { | |
1013 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 1014 | #ifdef CONFIG_RPS |
6e3f7faf ED |
1015 | struct rps_map *map; |
1016 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 1017 | |
33d480ce | 1018 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
1019 | if (map) { |
1020 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 1021 | kfree_rcu(map, rcu); |
9ea19481 | 1022 | } |
6e3f7faf | 1023 | |
33d480ce | 1024 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
1025 | if (flow_table) { |
1026 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 1027 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 1028 | } |
a953be53 | 1029 | #endif |
0a9627f2 | 1030 | |
9ea19481 | 1031 | memset(kobj, 0, sizeof(*kobj)); |
d62607c3 | 1032 | netdev_put(queue->dev, &queue->dev_tracker); |
0a9627f2 TH |
1033 | } |
1034 | ||
02a476d9 | 1035 | static const void *rx_queue_namespace(const struct kobject *kobj) |
82ef3d5d WC |
1036 | { |
1037 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
1038 | struct device *dev = &queue->dev->dev; | |
1039 | const void *ns = NULL; | |
1040 | ||
1041 | if (dev->class && dev->class->ns_type) | |
1042 | ns = dev->class->namespace(dev); | |
1043 | ||
1044 | return ns; | |
1045 | } | |
1046 | ||
02a476d9 | 1047 | static void rx_queue_get_ownership(const struct kobject *kobj, |
b0e37c0d DT |
1048 | kuid_t *uid, kgid_t *gid) |
1049 | { | |
1050 | const struct net *net = rx_queue_namespace(kobj); | |
1051 | ||
1052 | net_ns_get_ownership(net, uid, gid); | |
1053 | } | |
1054 | ||
b2793517 | 1055 | static const struct kobj_type rx_queue_ktype = { |
0a9627f2 TH |
1056 | .sysfs_ops = &rx_queue_sysfs_ops, |
1057 | .release = rx_queue_release, | |
be0d6926 | 1058 | .default_groups = rx_queue_default_groups, |
b0e37c0d DT |
1059 | .namespace = rx_queue_namespace, |
1060 | .get_ownership = rx_queue_get_ownership, | |
0a9627f2 TH |
1061 | }; |
1062 | ||
6b53dafe | 1063 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 1064 | { |
6b53dafe | 1065 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
1066 | struct kobject *kobj = &queue->kobj; |
1067 | int error = 0; | |
1068 | ||
ddd9b5e3 JH |
1069 | /* Kobject_put later will trigger rx_queue_release call which |
1070 | * decreases dev refcount: Take that reference here | |
1071 | */ | |
d62607c3 | 1072 | netdev_hold(queue->dev, &queue->dev_tracker, GFP_KERNEL); |
ddd9b5e3 | 1073 | |
6b53dafe | 1074 | kobj->kset = dev->queues_kset; |
0a9627f2 | 1075 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
6648c65e | 1076 | "rx-%u", index); |
a953be53 | 1077 | if (error) |
b8eb7183 | 1078 | goto err; |
a953be53 | 1079 | |
6b53dafe WC |
1080 | if (dev->sysfs_rx_queue_group) { |
1081 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
b8eb7183 JH |
1082 | if (error) |
1083 | goto err; | |
0a9627f2 TH |
1084 | } |
1085 | ||
605cfa1b PA |
1086 | #if IS_ENABLED(CONFIG_RPS) && IS_ENABLED(CONFIG_SYSCTL) |
1087 | if (!cpumask_empty(&rps_default_mask)) { | |
1088 | error = netdev_rx_queue_set_rps_mask(queue, &rps_default_mask); | |
1089 | if (error) | |
1090 | goto err; | |
1091 | } | |
1092 | #endif | |
0a9627f2 TH |
1093 | kobject_uevent(kobj, KOBJ_ADD); |
1094 | ||
1095 | return error; | |
b8eb7183 JH |
1096 | |
1097 | err: | |
1098 | kobject_put(kobj); | |
1099 | return error; | |
0a9627f2 | 1100 | } |
d755407d CB |
1101 | |
1102 | static int rx_queue_change_owner(struct net_device *dev, int index, kuid_t kuid, | |
1103 | kgid_t kgid) | |
1104 | { | |
1105 | struct netdev_rx_queue *queue = dev->_rx + index; | |
1106 | struct kobject *kobj = &queue->kobj; | |
1107 | int error; | |
1108 | ||
1109 | error = sysfs_change_owner(kobj, kuid, kgid); | |
1110 | if (error) | |
1111 | return error; | |
1112 | ||
1113 | if (dev->sysfs_rx_queue_group) | |
1114 | error = sysfs_group_change_owner( | |
1115 | kobj, dev->sysfs_rx_queue_group, kuid, kgid); | |
1116 | ||
1117 | return error; | |
1118 | } | |
80dd6eac | 1119 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 1120 | |
62fe0b40 | 1121 | int |
6b53dafe | 1122 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 1123 | { |
a953be53 | 1124 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1125 | int i; |
1126 | int error = 0; | |
1127 | ||
a953be53 | 1128 | #ifndef CONFIG_RPS |
6b53dafe | 1129 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
1130 | return 0; |
1131 | #endif | |
62fe0b40 | 1132 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 1133 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
1134 | if (error) { |
1135 | new_num = old_num; | |
0a9627f2 | 1136 | break; |
62fe0b40 | 1137 | } |
0a9627f2 TH |
1138 | } |
1139 | ||
a953be53 | 1140 | while (--i >= new_num) { |
002d8a1a AV |
1141 | struct kobject *kobj = &dev->_rx[i].kobj; |
1142 | ||
8b8f3e66 | 1143 | if (!refcount_read(&dev_net(dev)->ns.count)) |
002d8a1a | 1144 | kobj->uevent_suppress = 1; |
6b53dafe | 1145 | if (dev->sysfs_rx_queue_group) |
002d8a1a AV |
1146 | sysfs_remove_group(kobj, dev->sysfs_rx_queue_group); |
1147 | kobject_put(kobj); | |
a953be53 | 1148 | } |
0a9627f2 TH |
1149 | |
1150 | return error; | |
bf264145 TH |
1151 | #else |
1152 | return 0; | |
1153 | #endif | |
0a9627f2 TH |
1154 | } |
1155 | ||
d755407d CB |
1156 | static int net_rx_queue_change_owner(struct net_device *dev, int num, |
1157 | kuid_t kuid, kgid_t kgid) | |
1158 | { | |
1159 | #ifdef CONFIG_SYSFS | |
1160 | int error = 0; | |
1161 | int i; | |
1162 | ||
1163 | #ifndef CONFIG_RPS | |
1164 | if (!dev->sysfs_rx_queue_group) | |
1165 | return 0; | |
1166 | #endif | |
1167 | for (i = 0; i < num; i++) { | |
1168 | error = rx_queue_change_owner(dev, i, kuid, kgid); | |
1169 | if (error) | |
1170 | break; | |
1171 | } | |
1172 | ||
1173 | return error; | |
1174 | #else | |
1175 | return 0; | |
1176 | #endif | |
1177 | } | |
1178 | ||
ccf5ff69 | 1179 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1180 | /* |
1181 | * netdev_queue sysfs structures and functions. | |
1182 | */ | |
1183 | struct netdev_queue_attribute { | |
1184 | struct attribute attr; | |
718ad681 | 1185 | ssize_t (*show)(struct netdev_queue *queue, char *buf); |
1d24eb48 | 1186 | ssize_t (*store)(struct netdev_queue *queue, |
718ad681 | 1187 | const char *buf, size_t len); |
1d24eb48 | 1188 | }; |
6648c65e | 1189 | #define to_netdev_queue_attr(_attr) \ |
1190 | container_of(_attr, struct netdev_queue_attribute, attr) | |
1d24eb48 TH |
1191 | |
1192 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
1193 | ||
1194 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
1195 | struct attribute *attr, char *buf) | |
1196 | { | |
667e427b | 1197 | const struct netdev_queue_attribute *attribute |
1198 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1199 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1200 | ||
1201 | if (!attribute->show) | |
1202 | return -EIO; | |
1203 | ||
718ad681 | 1204 | return attribute->show(queue, buf); |
1d24eb48 TH |
1205 | } |
1206 | ||
1207 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
1208 | struct attribute *attr, | |
1209 | const char *buf, size_t count) | |
1210 | { | |
667e427b | 1211 | const struct netdev_queue_attribute *attribute |
1212 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1213 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1214 | ||
1215 | if (!attribute->store) | |
1216 | return -EIO; | |
1217 | ||
718ad681 | 1218 | return attribute->store(queue, buf, count); |
1d24eb48 TH |
1219 | } |
1220 | ||
1221 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
1222 | .show = netdev_queue_attr_show, | |
1223 | .store = netdev_queue_attr_store, | |
1224 | }; | |
1225 | ||
2b9c7581 | 1226 | static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf) |
ccf5ff69 | 1227 | { |
8160fb43 | 1228 | unsigned long trans_timeout = atomic_long_read(&queue->trans_timeout); |
ccf5ff69 | 1229 | |
73c2e90a | 1230 | return sysfs_emit(buf, fmt_ulong, trans_timeout); |
ccf5ff69 | 1231 | } |
1232 | ||
c4047f53 | 1233 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
822b3b2e JF |
1234 | { |
1235 | struct net_device *dev = queue->dev; | |
c4047f53 | 1236 | unsigned int i; |
822b3b2e | 1237 | |
c4047f53 | 1238 | i = queue - dev->_tx; |
822b3b2e JF |
1239 | BUG_ON(i >= dev->num_tx_queues); |
1240 | ||
1241 | return i; | |
1242 | } | |
1243 | ||
2b9c7581 | 1244 | static ssize_t traffic_class_show(struct netdev_queue *queue, |
8d059b0f AD |
1245 | char *buf) |
1246 | { | |
1247 | struct net_device *dev = queue->dev; | |
b2f17564 | 1248 | int num_tc, tc; |
d7be9775 | 1249 | int index; |
8d059b0f | 1250 | |
d7be9775 AD |
1251 | if (!netif_is_multiqueue(dev)) |
1252 | return -ENOENT; | |
1253 | ||
b2f17564 AD |
1254 | if (!rtnl_trylock()) |
1255 | return restart_syscall(); | |
1256 | ||
d7be9775 | 1257 | index = get_netdev_queue_index(queue); |
ffcfe25b AD |
1258 | |
1259 | /* If queue belongs to subordinate dev use its TC mapping */ | |
1260 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1261 | ||
b2f17564 | 1262 | num_tc = dev->num_tc; |
d7be9775 | 1263 | tc = netdev_txq_to_tc(dev, index); |
b2f17564 AD |
1264 | |
1265 | rtnl_unlock(); | |
1266 | ||
8d059b0f AD |
1267 | if (tc < 0) |
1268 | return -EINVAL; | |
1269 | ||
ffcfe25b AD |
1270 | /* We can report the traffic class one of two ways: |
1271 | * Subordinate device traffic classes are reported with the traffic | |
1272 | * class first, and then the subordinate class so for example TC0 on | |
1273 | * subordinate device 2 will be reported as "0-2". If the queue | |
1274 | * belongs to the root device it will be reported with just the | |
1275 | * traffic class, so just "0" for TC 0 for example. | |
1276 | */ | |
73c2e90a WY |
1277 | return num_tc < 0 ? sysfs_emit(buf, "%d%d\n", tc, num_tc) : |
1278 | sysfs_emit(buf, "%d\n", tc); | |
8d059b0f AD |
1279 | } |
1280 | ||
1281 | #ifdef CONFIG_XPS | |
2b9c7581 | 1282 | static ssize_t tx_maxrate_show(struct netdev_queue *queue, |
822b3b2e JF |
1283 | char *buf) |
1284 | { | |
73c2e90a | 1285 | return sysfs_emit(buf, "%lu\n", queue->tx_maxrate); |
822b3b2e JF |
1286 | } |
1287 | ||
2b9c7581 | 1288 | static ssize_t tx_maxrate_store(struct netdev_queue *queue, |
1289 | const char *buf, size_t len) | |
822b3b2e JF |
1290 | { |
1291 | struct net_device *dev = queue->dev; | |
1292 | int err, index = get_netdev_queue_index(queue); | |
1293 | u32 rate = 0; | |
1294 | ||
3033fced TH |
1295 | if (!capable(CAP_NET_ADMIN)) |
1296 | return -EPERM; | |
1297 | ||
146e5e73 AT |
1298 | /* The check is also done later; this helps returning early without |
1299 | * hitting the trylock/restart below. | |
1300 | */ | |
1301 | if (!dev->netdev_ops->ndo_set_tx_maxrate) | |
1302 | return -EOPNOTSUPP; | |
1303 | ||
822b3b2e JF |
1304 | err = kstrtou32(buf, 10, &rate); |
1305 | if (err < 0) | |
1306 | return err; | |
1307 | ||
1308 | if (!rtnl_trylock()) | |
1309 | return restart_syscall(); | |
1310 | ||
1311 | err = -EOPNOTSUPP; | |
1312 | if (dev->netdev_ops->ndo_set_tx_maxrate) | |
1313 | err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); | |
1314 | ||
1315 | rtnl_unlock(); | |
1316 | if (!err) { | |
1317 | queue->tx_maxrate = rate; | |
1318 | return len; | |
1319 | } | |
1320 | return err; | |
1321 | } | |
1322 | ||
2b9c7581 | 1323 | static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init |
1324 | = __ATTR_RW(tx_maxrate); | |
822b3b2e JF |
1325 | #endif |
1326 | ||
2b9c7581 | 1327 | static struct netdev_queue_attribute queue_trans_timeout __ro_after_init |
1328 | = __ATTR_RO(tx_timeout); | |
ccf5ff69 | 1329 | |
2b9c7581 | 1330 | static struct netdev_queue_attribute queue_traffic_class __ro_after_init |
1331 | = __ATTR_RO(traffic_class); | |
8d059b0f | 1332 | |
114cf580 TH |
1333 | #ifdef CONFIG_BQL |
1334 | /* | |
1335 | * Byte queue limits sysfs structures and functions. | |
1336 | */ | |
1337 | static ssize_t bql_show(char *buf, unsigned int value) | |
1338 | { | |
73c2e90a | 1339 | return sysfs_emit(buf, "%u\n", value); |
114cf580 TH |
1340 | } |
1341 | ||
1342 | static ssize_t bql_set(const char *buf, const size_t count, | |
1343 | unsigned int *pvalue) | |
1344 | { | |
1345 | unsigned int value; | |
1346 | int err; | |
1347 | ||
6648c65e | 1348 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) { |
114cf580 | 1349 | value = DQL_MAX_LIMIT; |
6648c65e | 1350 | } else { |
114cf580 TH |
1351 | err = kstrtouint(buf, 10, &value); |
1352 | if (err < 0) | |
1353 | return err; | |
1354 | if (value > DQL_MAX_LIMIT) | |
1355 | return -EINVAL; | |
1356 | } | |
1357 | ||
1358 | *pvalue = value; | |
1359 | ||
1360 | return count; | |
1361 | } | |
1362 | ||
1363 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1364 | char *buf) |
1365 | { | |
1366 | struct dql *dql = &queue->dql; | |
1367 | ||
73c2e90a | 1368 | return sysfs_emit(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); |
114cf580 TH |
1369 | } |
1370 | ||
1371 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1372 | const char *buf, size_t len) |
1373 | { | |
1374 | struct dql *dql = &queue->dql; | |
95c96174 | 1375 | unsigned int value; |
114cf580 TH |
1376 | int err; |
1377 | ||
1378 | err = kstrtouint(buf, 10, &value); | |
1379 | if (err < 0) | |
1380 | return err; | |
1381 | ||
1382 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1383 | ||
1384 | return len; | |
1385 | } | |
1386 | ||
170c658a | 1387 | static struct netdev_queue_attribute bql_hold_time_attribute __ro_after_init |
d6444062 | 1388 | = __ATTR(hold_time, 0644, |
170c658a | 1389 | bql_show_hold_time, bql_set_hold_time); |
114cf580 TH |
1390 | |
1391 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
114cf580 TH |
1392 | char *buf) |
1393 | { | |
1394 | struct dql *dql = &queue->dql; | |
1395 | ||
73c2e90a | 1396 | return sysfs_emit(buf, "%u\n", dql->num_queued - dql->num_completed); |
114cf580 TH |
1397 | } |
1398 | ||
170c658a | 1399 | static struct netdev_queue_attribute bql_inflight_attribute __ro_after_init = |
d6444062 | 1400 | __ATTR(inflight, 0444, bql_show_inflight, NULL); |
114cf580 TH |
1401 | |
1402 | #define BQL_ATTR(NAME, FIELD) \ | |
1403 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1404 | char *buf) \ |
1405 | { \ | |
1406 | return bql_show(buf, queue->dql.FIELD); \ | |
1407 | } \ | |
1408 | \ | |
1409 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1410 | const char *buf, size_t len) \ |
1411 | { \ | |
1412 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1413 | } \ | |
1414 | \ | |
170c658a | 1415 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute __ro_after_init \ |
d6444062 | 1416 | = __ATTR(NAME, 0644, \ |
170c658a | 1417 | bql_show_ ## NAME, bql_set_ ## NAME) |
114cf580 | 1418 | |
170c658a | 1419 | BQL_ATTR(limit, limit); |
1420 | BQL_ATTR(limit_max, max_limit); | |
1421 | BQL_ATTR(limit_min, min_limit); | |
114cf580 | 1422 | |
170c658a | 1423 | static struct attribute *dql_attrs[] __ro_after_init = { |
114cf580 TH |
1424 | &bql_limit_attribute.attr, |
1425 | &bql_limit_max_attribute.attr, | |
1426 | &bql_limit_min_attribute.attr, | |
1427 | &bql_hold_time_attribute.attr, | |
1428 | &bql_inflight_attribute.attr, | |
1429 | NULL | |
1430 | }; | |
1431 | ||
38ef00cc | 1432 | static const struct attribute_group dql_group = { |
114cf580 TH |
1433 | .name = "byte_queue_limits", |
1434 | .attrs = dql_attrs, | |
1435 | }; | |
1436 | #endif /* CONFIG_BQL */ | |
1437 | ||
ccf5ff69 | 1438 | #ifdef CONFIG_XPS |
2db6cdae AT |
1439 | static ssize_t xps_queue_show(struct net_device *dev, unsigned int index, |
1440 | int tc, char *buf, enum xps_map_type type) | |
1d24eb48 | 1441 | { |
1d24eb48 | 1442 | struct xps_dev_maps *dev_maps; |
d9a063d2 | 1443 | unsigned long *mask; |
2db6cdae AT |
1444 | unsigned int nr_ids; |
1445 | int j, len; | |
d7be87a6 | 1446 | |
5478fcd0 | 1447 | rcu_read_lock(); |
2db6cdae AT |
1448 | dev_maps = rcu_dereference(dev->xps_maps[type]); |
1449 | ||
1450 | /* Default to nr_cpu_ids/dev->num_rx_queues and do not just return 0 | |
1451 | * when dev_maps hasn't been allocated yet, to be backward compatible. | |
1452 | */ | |
1453 | nr_ids = dev_maps ? dev_maps->nr_ids : | |
1454 | (type == XPS_CPUS ? nr_cpu_ids : dev->num_rx_queues); | |
5478fcd0 | 1455 | |
7f08ec6e | 1456 | mask = bitmap_zalloc(nr_ids, GFP_NOWAIT); |
ea4fe7e8 | 1457 | if (!mask) { |
2db6cdae AT |
1458 | rcu_read_unlock(); |
1459 | return -ENOMEM; | |
fb250385 | 1460 | } |
664088f8 | 1461 | |
255c04a8 | 1462 | if (!dev_maps || tc >= dev_maps->num_tc) |
73f5e52b AT |
1463 | goto out_no_maps; |
1464 | ||
6f36158e | 1465 | for (j = 0; j < nr_ids; j++) { |
255c04a8 | 1466 | int i, tci = j * dev_maps->num_tc + tc; |
73f5e52b AT |
1467 | struct xps_map *map; |
1468 | ||
1469 | map = rcu_dereference(dev_maps->attr_map[tci]); | |
1470 | if (!map) | |
1471 | continue; | |
1472 | ||
1473 | for (i = map->len; i--;) { | |
1474 | if (map->queues[i] == index) { | |
08a7abf4 | 1475 | __set_bit(j, mask); |
73f5e52b | 1476 | break; |
1d24eb48 TH |
1477 | } |
1478 | } | |
1479 | } | |
73f5e52b | 1480 | out_no_maps: |
1d24eb48 | 1481 | rcu_read_unlock(); |
fb250385 | 1482 | |
5478fcd0 | 1483 | len = bitmap_print_to_pagebuf(false, buf, mask, nr_ids); |
ea4fe7e8 | 1484 | bitmap_free(mask); |
2db6cdae | 1485 | |
f0906827 | 1486 | return len < PAGE_SIZE ? len : -EINVAL; |
2db6cdae AT |
1487 | } |
1488 | ||
1489 | static ssize_t xps_cpus_show(struct netdev_queue *queue, char *buf) | |
1490 | { | |
1491 | struct net_device *dev = queue->dev; | |
1492 | unsigned int index; | |
1493 | int len, tc; | |
1494 | ||
1495 | if (!netif_is_multiqueue(dev)) | |
1496 | return -ENOENT; | |
1497 | ||
1498 | index = get_netdev_queue_index(queue); | |
1499 | ||
1500 | if (!rtnl_trylock()) | |
1501 | return restart_syscall(); | |
1502 | ||
1503 | /* If queue belongs to subordinate dev use its map */ | |
1504 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1505 | ||
1506 | tc = netdev_txq_to_tc(dev, index); | |
1507 | if (tc < 0) { | |
1508 | rtnl_unlock(); | |
1509 | return -EINVAL; | |
1510 | } | |
1511 | ||
1512 | /* Make sure the subordinate device can't be freed */ | |
1513 | get_device(&dev->dev); | |
1514 | rtnl_unlock(); | |
1515 | ||
1516 | len = xps_queue_show(dev, index, tc, buf, XPS_CPUS); | |
fb250385 | 1517 | |
d7be87a6 | 1518 | put_device(&dev->dev); |
2db6cdae | 1519 | return len; |
1d24eb48 TH |
1520 | } |
1521 | ||
2b9c7581 | 1522 | static ssize_t xps_cpus_store(struct netdev_queue *queue, |
1523 | const char *buf, size_t len) | |
1d24eb48 TH |
1524 | { |
1525 | struct net_device *dev = queue->dev; | |
d9a063d2 | 1526 | unsigned int index; |
537c00de AD |
1527 | cpumask_var_t mask; |
1528 | int err; | |
1d24eb48 | 1529 | |
d7be9775 AD |
1530 | if (!netif_is_multiqueue(dev)) |
1531 | return -ENOENT; | |
1532 | ||
1d24eb48 TH |
1533 | if (!capable(CAP_NET_ADMIN)) |
1534 | return -EPERM; | |
1535 | ||
1536 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1537 | return -ENOMEM; | |
1538 | ||
1539 | index = get_netdev_queue_index(queue); | |
1540 | ||
1541 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1542 | if (err) { | |
1543 | free_cpumask_var(mask); | |
1544 | return err; | |
1545 | } | |
1546 | ||
1ad58225 AT |
1547 | if (!rtnl_trylock()) { |
1548 | free_cpumask_var(mask); | |
1549 | return restart_syscall(); | |
1550 | } | |
1551 | ||
537c00de | 1552 | err = netif_set_xps_queue(dev, mask, index); |
1ad58225 | 1553 | rtnl_unlock(); |
1d24eb48 TH |
1554 | |
1555 | free_cpumask_var(mask); | |
1d24eb48 | 1556 | |
537c00de | 1557 | return err ? : len; |
1d24eb48 TH |
1558 | } |
1559 | ||
2b9c7581 | 1560 | static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init |
1561 | = __ATTR_RW(xps_cpus); | |
8af2c06f AN |
1562 | |
1563 | static ssize_t xps_rxqs_show(struct netdev_queue *queue, char *buf) | |
1564 | { | |
1565 | struct net_device *dev = queue->dev; | |
2db6cdae AT |
1566 | unsigned int index; |
1567 | int tc; | |
8af2c06f AN |
1568 | |
1569 | index = get_netdev_queue_index(queue); | |
1570 | ||
4ae2bb81 AT |
1571 | if (!rtnl_trylock()) |
1572 | return restart_syscall(); | |
1573 | ||
255c04a8 | 1574 | tc = netdev_txq_to_tc(dev, index); |
d7be87a6 AT |
1575 | rtnl_unlock(); |
1576 | if (tc < 0) | |
1577 | return -EINVAL; | |
255c04a8 | 1578 | |
2db6cdae | 1579 | return xps_queue_show(dev, index, tc, buf, XPS_RXQS); |
8af2c06f AN |
1580 | } |
1581 | ||
1582 | static ssize_t xps_rxqs_store(struct netdev_queue *queue, const char *buf, | |
1583 | size_t len) | |
1584 | { | |
1585 | struct net_device *dev = queue->dev; | |
1586 | struct net *net = dev_net(dev); | |
d9a063d2 AT |
1587 | unsigned long *mask; |
1588 | unsigned int index; | |
8af2c06f AN |
1589 | int err; |
1590 | ||
1591 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1592 | return -EPERM; | |
1593 | ||
29ca1c5a | 1594 | mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL); |
8af2c06f AN |
1595 | if (!mask) |
1596 | return -ENOMEM; | |
1597 | ||
1598 | index = get_netdev_queue_index(queue); | |
1599 | ||
1600 | err = bitmap_parse(buf, len, mask, dev->num_rx_queues); | |
1601 | if (err) { | |
29ca1c5a | 1602 | bitmap_free(mask); |
8af2c06f AN |
1603 | return err; |
1604 | } | |
1605 | ||
2d57b4f1 AT |
1606 | if (!rtnl_trylock()) { |
1607 | bitmap_free(mask); | |
1608 | return restart_syscall(); | |
1609 | } | |
1610 | ||
4d99f660 | 1611 | cpus_read_lock(); |
044ab86d | 1612 | err = __netif_set_xps_queue(dev, mask, index, XPS_RXQS); |
4d99f660 AV |
1613 | cpus_read_unlock(); |
1614 | ||
2d57b4f1 AT |
1615 | rtnl_unlock(); |
1616 | ||
29ca1c5a | 1617 | bitmap_free(mask); |
8af2c06f AN |
1618 | return err ? : len; |
1619 | } | |
1620 | ||
1621 | static struct netdev_queue_attribute xps_rxqs_attribute __ro_after_init | |
1622 | = __ATTR_RW(xps_rxqs); | |
ccf5ff69 | 1623 | #endif /* CONFIG_XPS */ |
1d24eb48 | 1624 | |
2b9c7581 | 1625 | static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { |
ccf5ff69 | 1626 | &queue_trans_timeout.attr, |
8d059b0f | 1627 | &queue_traffic_class.attr, |
ccf5ff69 | 1628 | #ifdef CONFIG_XPS |
1d24eb48 | 1629 | &xps_cpus_attribute.attr, |
8af2c06f | 1630 | &xps_rxqs_attribute.attr, |
822b3b2e | 1631 | &queue_tx_maxrate.attr, |
ccf5ff69 | 1632 | #endif |
1d24eb48 TH |
1633 | NULL |
1634 | }; | |
be0d6926 | 1635 | ATTRIBUTE_GROUPS(netdev_queue_default); |
1d24eb48 TH |
1636 | |
1637 | static void netdev_queue_release(struct kobject *kobj) | |
1638 | { | |
1639 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1640 | |
1d24eb48 | 1641 | memset(kobj, 0, sizeof(*kobj)); |
d62607c3 | 1642 | netdev_put(queue->dev, &queue->dev_tracker); |
1d24eb48 TH |
1643 | } |
1644 | ||
02a476d9 | 1645 | static const void *netdev_queue_namespace(const struct kobject *kobj) |
82ef3d5d WC |
1646 | { |
1647 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1648 | struct device *dev = &queue->dev->dev; | |
1649 | const void *ns = NULL; | |
1650 | ||
1651 | if (dev->class && dev->class->ns_type) | |
1652 | ns = dev->class->namespace(dev); | |
1653 | ||
1654 | return ns; | |
1655 | } | |
1656 | ||
02a476d9 | 1657 | static void netdev_queue_get_ownership(const struct kobject *kobj, |
b0e37c0d DT |
1658 | kuid_t *uid, kgid_t *gid) |
1659 | { | |
1660 | const struct net *net = netdev_queue_namespace(kobj); | |
1661 | ||
1662 | net_ns_get_ownership(net, uid, gid); | |
1663 | } | |
1664 | ||
b2793517 | 1665 | static const struct kobj_type netdev_queue_ktype = { |
1d24eb48 TH |
1666 | .sysfs_ops = &netdev_queue_sysfs_ops, |
1667 | .release = netdev_queue_release, | |
be0d6926 | 1668 | .default_groups = netdev_queue_default_groups, |
82ef3d5d | 1669 | .namespace = netdev_queue_namespace, |
b0e37c0d | 1670 | .get_ownership = netdev_queue_get_ownership, |
1d24eb48 TH |
1671 | }; |
1672 | ||
6b53dafe | 1673 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1674 | { |
6b53dafe | 1675 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1676 | struct kobject *kobj = &queue->kobj; |
1677 | int error = 0; | |
1678 | ||
e0b60903 JH |
1679 | /* Kobject_put later will trigger netdev_queue_release call |
1680 | * which decreases dev refcount: Take that reference here | |
1681 | */ | |
d62607c3 | 1682 | netdev_hold(queue->dev, &queue->dev_tracker, GFP_KERNEL); |
e0b60903 | 1683 | |
6b53dafe | 1684 | kobj->kset = dev->queues_kset; |
1d24eb48 | 1685 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
6648c65e | 1686 | "tx-%u", index); |
114cf580 | 1687 | if (error) |
b8eb7183 | 1688 | goto err; |
114cf580 TH |
1689 | |
1690 | #ifdef CONFIG_BQL | |
1691 | error = sysfs_create_group(kobj, &dql_group); | |
b8eb7183 JH |
1692 | if (error) |
1693 | goto err; | |
114cf580 | 1694 | #endif |
1d24eb48 TH |
1695 | |
1696 | kobject_uevent(kobj, KOBJ_ADD); | |
48a322b6 | 1697 | return 0; |
1d24eb48 | 1698 | |
b8eb7183 JH |
1699 | err: |
1700 | kobject_put(kobj); | |
1701 | return error; | |
1d24eb48 | 1702 | } |
d755407d CB |
1703 | |
1704 | static int tx_queue_change_owner(struct net_device *ndev, int index, | |
1705 | kuid_t kuid, kgid_t kgid) | |
1706 | { | |
1707 | struct netdev_queue *queue = ndev->_tx + index; | |
1708 | struct kobject *kobj = &queue->kobj; | |
1709 | int error; | |
1710 | ||
1711 | error = sysfs_change_owner(kobj, kuid, kgid); | |
1712 | if (error) | |
1713 | return error; | |
1714 | ||
1715 | #ifdef CONFIG_BQL | |
1716 | error = sysfs_group_change_owner(kobj, &dql_group, kuid, kgid); | |
1717 | #endif | |
1718 | return error; | |
1719 | } | |
ccf5ff69 | 1720 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1721 | |
1722 | int | |
6b53dafe | 1723 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1724 | { |
ccf5ff69 | 1725 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1726 | int i; |
1727 | int error = 0; | |
1728 | ||
5f1c802c AT |
1729 | /* Tx queue kobjects are allowed to be updated when a device is being |
1730 | * unregistered, but solely to remove queues from qdiscs. Any path | |
1731 | * adding queues should be fixed. | |
1732 | */ | |
1733 | WARN(dev->reg_state == NETREG_UNREGISTERING && new_num > old_num, | |
1734 | "New queues can't be registered after device unregistration."); | |
1735 | ||
1d24eb48 | 1736 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 1737 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1738 | if (error) { |
1739 | new_num = old_num; | |
1740 | break; | |
1741 | } | |
1742 | } | |
1743 | ||
114cf580 | 1744 | while (--i >= new_num) { |
6b53dafe | 1745 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 | 1746 | |
8b8f3e66 | 1747 | if (!refcount_read(&dev_net(dev)->ns.count)) |
002d8a1a | 1748 | queue->kobj.uevent_suppress = 1; |
114cf580 TH |
1749 | #ifdef CONFIG_BQL |
1750 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1751 | #endif | |
1752 | kobject_put(&queue->kobj); | |
1753 | } | |
1d24eb48 TH |
1754 | |
1755 | return error; | |
bf264145 TH |
1756 | #else |
1757 | return 0; | |
ccf5ff69 | 1758 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1759 | } |
1760 | ||
d755407d CB |
1761 | static int net_tx_queue_change_owner(struct net_device *dev, int num, |
1762 | kuid_t kuid, kgid_t kgid) | |
1763 | { | |
1764 | #ifdef CONFIG_SYSFS | |
1765 | int error = 0; | |
1766 | int i; | |
1767 | ||
1768 | for (i = 0; i < num; i++) { | |
1769 | error = tx_queue_change_owner(dev, i, kuid, kgid); | |
1770 | if (error) | |
1771 | break; | |
1772 | } | |
1773 | ||
1774 | return error; | |
1775 | #else | |
1776 | return 0; | |
1777 | #endif /* CONFIG_SYSFS */ | |
1778 | } | |
1779 | ||
6b53dafe | 1780 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1781 | { |
bf264145 | 1782 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1783 | |
ccf5ff69 | 1784 | #ifdef CONFIG_SYSFS |
6b53dafe | 1785 | dev->queues_kset = kset_create_and_add("queues", |
6648c65e | 1786 | NULL, &dev->dev.kobj); |
6b53dafe | 1787 | if (!dev->queues_kset) |
62fe0b40 | 1788 | return -ENOMEM; |
6b53dafe | 1789 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1790 | #endif |
6b53dafe | 1791 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1792 | |
6b53dafe | 1793 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1794 | if (error) |
1795 | goto error; | |
bf264145 | 1796 | rxq = real_rx; |
1d24eb48 | 1797 | |
6b53dafe | 1798 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1799 | if (error) |
1800 | goto error; | |
bf264145 | 1801 | txq = real_tx; |
1d24eb48 TH |
1802 | |
1803 | return 0; | |
1804 | ||
1805 | error: | |
6b53dafe WC |
1806 | netdev_queue_update_kobjects(dev, txq, 0); |
1807 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
895a5e96 Y |
1808 | #ifdef CONFIG_SYSFS |
1809 | kset_unregister(dev->queues_kset); | |
1810 | #endif | |
1d24eb48 | 1811 | return error; |
62fe0b40 | 1812 | } |
0a9627f2 | 1813 | |
d755407d CB |
1814 | static int queue_change_owner(struct net_device *ndev, kuid_t kuid, kgid_t kgid) |
1815 | { | |
1816 | int error = 0, real_rx = 0, real_tx = 0; | |
1817 | ||
1818 | #ifdef CONFIG_SYSFS | |
1819 | if (ndev->queues_kset) { | |
1820 | error = sysfs_change_owner(&ndev->queues_kset->kobj, kuid, kgid); | |
1821 | if (error) | |
1822 | return error; | |
1823 | } | |
1824 | real_rx = ndev->real_num_rx_queues; | |
1825 | #endif | |
1826 | real_tx = ndev->real_num_tx_queues; | |
1827 | ||
1828 | error = net_rx_queue_change_owner(ndev, real_rx, kuid, kgid); | |
1829 | if (error) | |
1830 | return error; | |
1831 | ||
1832 | error = net_tx_queue_change_owner(ndev, real_tx, kuid, kgid); | |
1833 | if (error) | |
1834 | return error; | |
1835 | ||
1836 | return 0; | |
1837 | } | |
1838 | ||
6b53dafe | 1839 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1840 | { |
bf264145 TH |
1841 | int real_rx = 0, real_tx = 0; |
1842 | ||
a953be53 | 1843 | #ifdef CONFIG_SYSFS |
6b53dafe | 1844 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1845 | #endif |
6b53dafe | 1846 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1847 | |
6b53dafe WC |
1848 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1849 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
d7dac083 AT |
1850 | |
1851 | dev->real_num_rx_queues = 0; | |
1852 | dev->real_num_tx_queues = 0; | |
ccf5ff69 | 1853 | #ifdef CONFIG_SYSFS |
6b53dafe | 1854 | kset_unregister(dev->queues_kset); |
bf264145 | 1855 | #endif |
0a9627f2 | 1856 | } |
608b4b95 | 1857 | |
7dc5dbc8 EB |
1858 | static bool net_current_may_mount(void) |
1859 | { | |
1860 | struct net *net = current->nsproxy->net_ns; | |
1861 | ||
1862 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1863 | } | |
1864 | ||
a685e089 | 1865 | static void *net_grab_current_ns(void) |
608b4b95 | 1866 | { |
a685e089 AV |
1867 | struct net *ns = current->nsproxy->net_ns; |
1868 | #ifdef CONFIG_NET_NS | |
1869 | if (ns) | |
c122e14d | 1870 | refcount_inc(&ns->passive); |
a685e089 AV |
1871 | #endif |
1872 | return ns; | |
608b4b95 EB |
1873 | } |
1874 | ||
1875 | static const void *net_initial_ns(void) | |
1876 | { | |
1877 | return &init_net; | |
1878 | } | |
1879 | ||
1880 | static const void *net_netlink_ns(struct sock *sk) | |
1881 | { | |
1882 | return sock_net(sk); | |
1883 | } | |
1884 | ||
737aec57 | 1885 | const struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1886 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1887 | .current_may_mount = net_current_may_mount, |
a685e089 | 1888 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1889 | .netlink_ns = net_netlink_ns, |
1890 | .initial_ns = net_initial_ns, | |
a685e089 | 1891 | .drop_ns = net_drop_ns, |
608b4b95 | 1892 | }; |
04600794 | 1893 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1894 | |
23680f0b | 1895 | static int netdev_uevent(const struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1896 | { |
23680f0b | 1897 | const struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1898 | int retval; |
1da177e4 | 1899 | |
312c004d | 1900 | /* pass interface to uevent. */ |
7eff2e7a | 1901 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1902 | if (retval) |
1903 | goto exit; | |
ca2f37db JT |
1904 | |
1905 | /* pass ifindex to uevent. | |
1906 | * ifindex is useful as it won't change (interface name may change) | |
6648c65e | 1907 | * and is what RtNetlink uses natively. |
1908 | */ | |
7eff2e7a | 1909 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1910 | |
bf62456e | 1911 | exit: |
bf62456e | 1912 | return retval; |
1da177e4 | 1913 | } |
1da177e4 LT |
1914 | |
1915 | /* | |
4ec93edb | 1916 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1917 | * Called when last reference to device kobject is gone. |
1da177e4 | 1918 | */ |
43cb76d9 | 1919 | static void netdev_release(struct device *d) |
1da177e4 | 1920 | { |
43cb76d9 | 1921 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1922 | |
1923 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1924 | ||
6c557001 FW |
1925 | /* no need to wait for rcu grace period: |
1926 | * device is dead and about to be freed. | |
1927 | */ | |
1928 | kfree(rcu_access_pointer(dev->ifalias)); | |
74d332c1 | 1929 | netdev_freemem(dev); |
1da177e4 LT |
1930 | } |
1931 | ||
fa627348 | 1932 | static const void *net_namespace(const struct device *d) |
608b4b95 | 1933 | { |
fa627348 | 1934 | const struct net_device *dev = to_net_dev(d); |
5c29482d | 1935 | |
608b4b95 EB |
1936 | return dev_net(dev); |
1937 | } | |
1938 | ||
fa627348 | 1939 | static void net_get_ownership(const struct device *d, kuid_t *uid, kgid_t *gid) |
b0e37c0d | 1940 | { |
fa627348 | 1941 | const struct net_device *dev = to_net_dev(d); |
b0e37c0d DT |
1942 | const struct net *net = dev_net(dev); |
1943 | ||
1944 | net_ns_get_ownership(net, uid, gid); | |
1945 | } | |
1946 | ||
e6d473e6 | 1947 | static struct class net_class __ro_after_init = { |
1da177e4 | 1948 | .name = "net", |
43cb76d9 | 1949 | .dev_release = netdev_release, |
6be8aeef | 1950 | .dev_groups = net_class_groups, |
43cb76d9 | 1951 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1952 | .ns_type = &net_ns_type_operations, |
1953 | .namespace = net_namespace, | |
b0e37c0d | 1954 | .get_ownership = net_get_ownership, |
1da177e4 LT |
1955 | }; |
1956 | ||
e330fb14 | 1957 | #ifdef CONFIG_OF |
aa836df9 FF |
1958 | static int of_dev_node_match(struct device *dev, const void *data) |
1959 | { | |
2e186a2c TW |
1960 | for (; dev; dev = dev->parent) { |
1961 | if (dev->of_node == data) | |
1962 | return 1; | |
1963 | } | |
aa836df9 | 1964 | |
2e186a2c | 1965 | return 0; |
aa836df9 FF |
1966 | } |
1967 | ||
9861f720 RK |
1968 | /* |
1969 | * of_find_net_device_by_node - lookup the net device for the device node | |
1970 | * @np: OF device node | |
1971 | * | |
1972 | * Looks up the net_device structure corresponding with the device node. | |
1973 | * If successful, returns a pointer to the net_device with the embedded | |
1974 | * struct device refcount incremented by one, or NULL on failure. The | |
1975 | * refcount must be dropped when done with the net_device. | |
1976 | */ | |
aa836df9 FF |
1977 | struct net_device *of_find_net_device_by_node(struct device_node *np) |
1978 | { | |
1979 | struct device *dev; | |
1980 | ||
1981 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1982 | if (!dev) | |
1983 | return NULL; | |
1984 | ||
1985 | return to_net_dev(dev); | |
1986 | } | |
1987 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1988 | #endif | |
1989 | ||
9093bbb2 SH |
1990 | /* Delete sysfs entries but hold kobject reference until after all |
1991 | * netdev references are gone. | |
1992 | */ | |
6b53dafe | 1993 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1994 | { |
6648c65e | 1995 | struct device *dev = &ndev->dev; |
9093bbb2 | 1996 | |
8b8f3e66 | 1997 | if (!refcount_read(&dev_net(ndev)->ns.count)) |
002d8a1a AV |
1998 | dev_set_uevent_suppress(dev, 1); |
1999 | ||
9093bbb2 | 2000 | kobject_get(&dev->kobj); |
3891845e | 2001 | |
6b53dafe | 2002 | remove_queue_kobjects(ndev); |
0a9627f2 | 2003 | |
9802c8e2 ML |
2004 | pm_runtime_set_memalloc_noio(dev, false); |
2005 | ||
9093bbb2 | 2006 | device_del(dev); |
1da177e4 LT |
2007 | } |
2008 | ||
2009 | /* Create sysfs entries for network device. */ | |
6b53dafe | 2010 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 2011 | { |
6648c65e | 2012 | struct device *dev = &ndev->dev; |
6b53dafe | 2013 | const struct attribute_group **groups = ndev->sysfs_groups; |
0a9627f2 | 2014 | int error = 0; |
1da177e4 | 2015 | |
a1b3f594 | 2016 | device_initialize(dev); |
43cb76d9 | 2017 | dev->class = &net_class; |
6b53dafe | 2018 | dev->platform_data = ndev; |
43cb76d9 | 2019 | dev->groups = groups; |
1da177e4 | 2020 | |
6b53dafe | 2021 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 2022 | |
8b41d188 | 2023 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
2024 | /* Allow for a device specific group */ |
2025 | if (*groups) | |
2026 | groups++; | |
1da177e4 | 2027 | |
0c509a6c | 2028 | *groups++ = &netstat_group; |
38c1a01c | 2029 | |
c304eddc | 2030 | if (wireless_group_needed(ndev)) |
38c1a01c | 2031 | *groups++ = &wireless_group; |
8b41d188 | 2032 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 2033 | |
0a9627f2 TH |
2034 | error = device_add(dev); |
2035 | if (error) | |
8ed633b9 | 2036 | return error; |
0a9627f2 | 2037 | |
6b53dafe | 2038 | error = register_queue_kobjects(ndev); |
8ed633b9 WH |
2039 | if (error) { |
2040 | device_del(dev); | |
2041 | return error; | |
2042 | } | |
0a9627f2 | 2043 | |
9802c8e2 ML |
2044 | pm_runtime_set_memalloc_noio(dev, true); |
2045 | ||
0a9627f2 | 2046 | return error; |
1da177e4 LT |
2047 | } |
2048 | ||
e6dee9f3 CB |
2049 | /* Change owner for sysfs entries when moving network devices across network |
2050 | * namespaces owned by different user namespaces. | |
2051 | */ | |
2052 | int netdev_change_owner(struct net_device *ndev, const struct net *net_old, | |
2053 | const struct net *net_new) | |
2054 | { | |
f7a1e76d XL |
2055 | kuid_t old_uid = GLOBAL_ROOT_UID, new_uid = GLOBAL_ROOT_UID; |
2056 | kgid_t old_gid = GLOBAL_ROOT_GID, new_gid = GLOBAL_ROOT_GID; | |
e6dee9f3 | 2057 | struct device *dev = &ndev->dev; |
e6dee9f3 CB |
2058 | int error; |
2059 | ||
2060 | net_ns_get_ownership(net_old, &old_uid, &old_gid); | |
2061 | net_ns_get_ownership(net_new, &new_uid, &new_gid); | |
2062 | ||
2063 | /* The network namespace was changed but the owning user namespace is | |
2064 | * identical so there's no need to change the owner of sysfs entries. | |
2065 | */ | |
2066 | if (uid_eq(old_uid, new_uid) && gid_eq(old_gid, new_gid)) | |
2067 | return 0; | |
2068 | ||
2069 | error = device_change_owner(dev, new_uid, new_gid); | |
2070 | if (error) | |
2071 | return error; | |
2072 | ||
d755407d CB |
2073 | error = queue_change_owner(ndev, new_uid, new_gid); |
2074 | if (error) | |
2075 | return error; | |
2076 | ||
e6dee9f3 CB |
2077 | return 0; |
2078 | } | |
2079 | ||
b793dc5c | 2080 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
58292cbe | 2081 | const void *ns) |
b8a9787e | 2082 | { |
58292cbe | 2083 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 2084 | } |
58292cbe | 2085 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 2086 | |
b793dc5c | 2087 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
58292cbe | 2088 | const void *ns) |
b8a9787e | 2089 | { |
58292cbe | 2090 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 2091 | } |
58292cbe | 2092 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 2093 | |
a48d4bb0 | 2094 | int __init netdev_kobject_init(void) |
1da177e4 | 2095 | { |
608b4b95 | 2096 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
2097 | return class_register(&net_class); |
2098 | } |