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 | |
342709ef PE |
27 | #include "net-sysfs.h" |
28 | ||
8b41d188 | 29 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
30 | static const char fmt_hex[] = "%#x\n"; |
31 | static const char fmt_dec[] = "%d\n"; | |
32 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 33 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 34 | |
4ec93edb | 35 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 36 | { |
fe9925b5 | 37 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
38 | } |
39 | ||
40 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
41 | static ssize_t netdev_show(const struct device *dev, |
42 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
43 | ssize_t (*format)(const struct net_device *, char *)) |
44 | { | |
6b53dafe | 45 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
46 | ssize_t ret = -EINVAL; |
47 | ||
48 | read_lock(&dev_base_lock); | |
6b53dafe WC |
49 | if (dev_isalive(ndev)) |
50 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
51 | read_unlock(&dev_base_lock); |
52 | ||
53 | return ret; | |
54 | } | |
55 | ||
56 | /* generate a show function for simple field */ | |
57 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 58 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 59 | { \ |
6b53dafe | 60 | return sprintf(buf, format_string, dev->field); \ |
1da177e4 | 61 | } \ |
6be8aeef | 62 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 63 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 64 | { \ |
43cb76d9 | 65 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
66 | } \ |
67 | ||
68 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
69 | NETDEVICE_SHOW(field, format_string); \ | |
70 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 71 | |
6be8aeef GKH |
72 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
73 | NETDEVICE_SHOW(field, format_string); \ | |
74 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
75 | |
76 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 77 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
78 | const char *buf, size_t len, |
79 | int (*set)(struct net_device *, unsigned long)) | |
80 | { | |
5e1fccc0 EB |
81 | struct net_device *netdev = to_net_dev(dev); |
82 | struct net *net = dev_net(netdev); | |
1da177e4 | 83 | unsigned long new; |
5f0224a6 | 84 | int ret; |
1da177e4 | 85 | |
5e1fccc0 | 86 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
87 | return -EPERM; |
88 | ||
e1e420c7 SK |
89 | ret = kstrtoul(buf, 0, &new); |
90 | if (ret) | |
1da177e4 LT |
91 | goto err; |
92 | ||
5a5990d3 | 93 | if (!rtnl_trylock()) |
336ca57c | 94 | return restart_syscall(); |
5a5990d3 | 95 | |
5e1fccc0 | 96 | if (dev_isalive(netdev)) { |
6648c65e | 97 | ret = (*set)(netdev, new); |
98 | if (ret == 0) | |
1da177e4 LT |
99 | ret = len; |
100 | } | |
101 | rtnl_unlock(); | |
102 | err: | |
103 | return ret; | |
104 | } | |
105 | ||
6be8aeef | 106 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 107 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
108 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
109 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
6be8aeef GKH |
110 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); |
111 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
112 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 | 113 | |
a54acb3a ND |
114 | static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, |
115 | char *buf) | |
116 | { | |
117 | struct net_device *ndev = to_net_dev(dev); | |
118 | ||
119 | return sprintf(buf, fmt_dec, dev_get_iflink(ndev)); | |
120 | } | |
121 | static DEVICE_ATTR_RO(iflink); | |
122 | ||
6b53dafe | 123 | static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) |
685343fc | 124 | { |
6b53dafe | 125 | return sprintf(buf, fmt_dec, dev->name_assign_type); |
685343fc TG |
126 | } |
127 | ||
128 | static ssize_t name_assign_type_show(struct device *dev, | |
129 | struct device_attribute *attr, | |
130 | char *buf) | |
131 | { | |
6b53dafe | 132 | struct net_device *ndev = to_net_dev(dev); |
685343fc TG |
133 | ssize_t ret = -EINVAL; |
134 | ||
6b53dafe | 135 | if (ndev->name_assign_type != NET_NAME_UNKNOWN) |
685343fc TG |
136 | ret = netdev_show(dev, attr, buf, format_name_assign_type); |
137 | ||
138 | return ret; | |
139 | } | |
140 | static DEVICE_ATTR_RO(name_assign_type); | |
141 | ||
1da177e4 | 142 | /* use same locking rules as GIFHWADDR ioctl's */ |
6be8aeef | 143 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 144 | char *buf) |
1da177e4 | 145 | { |
6b53dafe | 146 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
147 | ssize_t ret = -EINVAL; |
148 | ||
149 | read_lock(&dev_base_lock); | |
6b53dafe WC |
150 | if (dev_isalive(ndev)) |
151 | ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); | |
1da177e4 LT |
152 | read_unlock(&dev_base_lock); |
153 | return ret; | |
154 | } | |
6be8aeef | 155 | static DEVICE_ATTR_RO(address); |
1da177e4 | 156 | |
6be8aeef GKH |
157 | static ssize_t broadcast_show(struct device *dev, |
158 | struct device_attribute *attr, char *buf) | |
1da177e4 | 159 | { |
6b53dafe | 160 | struct net_device *ndev = to_net_dev(dev); |
6648c65e | 161 | |
6b53dafe WC |
162 | if (dev_isalive(ndev)) |
163 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
164 | return -EINVAL; |
165 | } | |
6be8aeef | 166 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 167 | |
6b53dafe | 168 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 169 | { |
6b53dafe | 170 | if (!netif_running(dev)) |
fdae0fde | 171 | return -EINVAL; |
6648c65e | 172 | return dev_change_carrier(dev, (bool)new_carrier); |
fdae0fde JP |
173 | } |
174 | ||
6be8aeef GKH |
175 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
176 | const char *buf, size_t len) | |
fdae0fde JP |
177 | { |
178 | return netdev_store(dev, attr, buf, len, change_carrier); | |
179 | } | |
180 | ||
6be8aeef | 181 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 182 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
183 | { |
184 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 185 | |
186 | if (netif_running(netdev)) | |
1da177e4 | 187 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
6648c65e | 188 | |
1da177e4 LT |
189 | return -EINVAL; |
190 | } | |
6be8aeef | 191 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 192 | |
6be8aeef | 193 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
194 | struct device_attribute *attr, char *buf) |
195 | { | |
196 | struct net_device *netdev = to_net_dev(dev); | |
197 | int ret = -EINVAL; | |
198 | ||
199 | if (!rtnl_trylock()) | |
200 | return restart_syscall(); | |
201 | ||
8ae6daca | 202 | if (netif_running(netdev)) { |
7cad1bac DD |
203 | struct ethtool_link_ksettings cmd; |
204 | ||
205 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) | |
206 | ret = sprintf(buf, fmt_dec, cmd.base.speed); | |
d519e17e AG |
207 | } |
208 | rtnl_unlock(); | |
209 | return ret; | |
210 | } | |
6be8aeef | 211 | static DEVICE_ATTR_RO(speed); |
d519e17e | 212 | |
6be8aeef | 213 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
214 | struct device_attribute *attr, char *buf) |
215 | { | |
216 | struct net_device *netdev = to_net_dev(dev); | |
217 | int ret = -EINVAL; | |
218 | ||
219 | if (!rtnl_trylock()) | |
220 | return restart_syscall(); | |
221 | ||
8ae6daca | 222 | if (netif_running(netdev)) { |
7cad1bac DD |
223 | struct ethtool_link_ksettings cmd; |
224 | ||
225 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) { | |
c6c13965 | 226 | const char *duplex; |
7cad1bac DD |
227 | |
228 | switch (cmd.base.duplex) { | |
c6c13965 NA |
229 | case DUPLEX_HALF: |
230 | duplex = "half"; | |
231 | break; | |
232 | case DUPLEX_FULL: | |
233 | duplex = "full"; | |
234 | break; | |
235 | default: | |
236 | duplex = "unknown"; | |
237 | break; | |
238 | } | |
239 | ret = sprintf(buf, "%s\n", duplex); | |
240 | } | |
d519e17e AG |
241 | } |
242 | rtnl_unlock(); | |
243 | return ret; | |
244 | } | |
6be8aeef | 245 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 246 | |
db30a577 AL |
247 | static ssize_t testing_show(struct device *dev, |
248 | struct device_attribute *attr, char *buf) | |
249 | { | |
250 | struct net_device *netdev = to_net_dev(dev); | |
251 | ||
252 | if (netif_running(netdev)) | |
253 | return sprintf(buf, fmt_dec, !!netif_testing(netdev)); | |
254 | ||
255 | return -EINVAL; | |
256 | } | |
257 | static DEVICE_ATTR_RO(testing); | |
258 | ||
6be8aeef | 259 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 260 | struct device_attribute *attr, char *buf) |
b00055aa SR |
261 | { |
262 | struct net_device *netdev = to_net_dev(dev); | |
263 | ||
264 | if (netif_running(netdev)) | |
265 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
266 | ||
267 | return -EINVAL; | |
268 | } | |
6be8aeef | 269 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 270 | |
36cbd3dc | 271 | static const char *const operstates[] = { |
b00055aa SR |
272 | "unknown", |
273 | "notpresent", /* currently unused */ | |
274 | "down", | |
275 | "lowerlayerdown", | |
db30a577 | 276 | "testing", |
b00055aa SR |
277 | "dormant", |
278 | "up" | |
279 | }; | |
280 | ||
6be8aeef | 281 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 282 | struct device_attribute *attr, char *buf) |
b00055aa SR |
283 | { |
284 | const struct net_device *netdev = to_net_dev(dev); | |
285 | unsigned char operstate; | |
286 | ||
287 | read_lock(&dev_base_lock); | |
288 | operstate = netdev->operstate; | |
289 | if (!netif_running(netdev)) | |
290 | operstate = IF_OPER_DOWN; | |
291 | read_unlock(&dev_base_lock); | |
292 | ||
e3a5cd9e | 293 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
294 | return -EINVAL; /* should not happen */ |
295 | ||
296 | return sprintf(buf, "%s\n", operstates[operstate]); | |
297 | } | |
6be8aeef | 298 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 299 | |
2d3b479d | 300 | static ssize_t carrier_changes_show(struct device *dev, |
301 | struct device_attribute *attr, | |
302 | char *buf) | |
303 | { | |
304 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 305 | |
2d3b479d | 306 | return sprintf(buf, fmt_dec, |
b2d3bcfa DD |
307 | atomic_read(&netdev->carrier_up_count) + |
308 | atomic_read(&netdev->carrier_down_count)); | |
2d3b479d | 309 | } |
310 | static DEVICE_ATTR_RO(carrier_changes); | |
311 | ||
b2d3bcfa DD |
312 | static ssize_t carrier_up_count_show(struct device *dev, |
313 | struct device_attribute *attr, | |
314 | char *buf) | |
315 | { | |
316 | struct net_device *netdev = to_net_dev(dev); | |
317 | ||
318 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_up_count)); | |
319 | } | |
320 | static DEVICE_ATTR_RO(carrier_up_count); | |
321 | ||
322 | static ssize_t carrier_down_count_show(struct device *dev, | |
323 | struct device_attribute *attr, | |
324 | char *buf) | |
325 | { | |
326 | struct net_device *netdev = to_net_dev(dev); | |
327 | ||
328 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_down_count)); | |
329 | } | |
330 | static DEVICE_ATTR_RO(carrier_down_count); | |
331 | ||
1da177e4 | 332 | /* read-write attributes */ |
1da177e4 | 333 | |
6b53dafe | 334 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 335 | { |
6648c65e | 336 | return dev_set_mtu(dev, (int)new_mtu); |
1da177e4 LT |
337 | } |
338 | ||
6be8aeef | 339 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 340 | const char *buf, size_t len) |
1da177e4 | 341 | { |
43cb76d9 | 342 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 343 | } |
6be8aeef | 344 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 345 | |
6b53dafe | 346 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 347 | { |
567c5e13 | 348 | return dev_change_flags(dev, (unsigned int)new_flags, NULL); |
1da177e4 LT |
349 | } |
350 | ||
6be8aeef | 351 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 352 | const char *buf, size_t len) |
1da177e4 | 353 | { |
43cb76d9 | 354 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 355 | } |
6be8aeef | 356 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 357 | |
6be8aeef | 358 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
359 | struct device_attribute *attr, |
360 | const char *buf, size_t len) | |
1da177e4 | 361 | { |
5e1fccc0 EB |
362 | if (!capable(CAP_NET_ADMIN)) |
363 | return -EPERM; | |
364 | ||
6a643ddb | 365 | return netdev_store(dev, attr, buf, len, dev_change_tx_queue_len); |
1da177e4 | 366 | } |
0cd29503 | 367 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec); |
1da177e4 | 368 | |
3b47d303 ED |
369 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
370 | { | |
7e417a66 | 371 | WRITE_ONCE(dev->gro_flush_timeout, val); |
3b47d303 ED |
372 | return 0; |
373 | } | |
374 | ||
375 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
6648c65e | 376 | struct device_attribute *attr, |
377 | const char *buf, size_t len) | |
3b47d303 ED |
378 | { |
379 | if (!capable(CAP_NET_ADMIN)) | |
380 | return -EPERM; | |
381 | ||
382 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
383 | } | |
384 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
385 | ||
6f8b12d6 ED |
386 | static int change_napi_defer_hard_irqs(struct net_device *dev, unsigned long val) |
387 | { | |
7e417a66 | 388 | WRITE_ONCE(dev->napi_defer_hard_irqs, val); |
6f8b12d6 ED |
389 | return 0; |
390 | } | |
391 | ||
392 | static ssize_t napi_defer_hard_irqs_store(struct device *dev, | |
393 | struct device_attribute *attr, | |
394 | const char *buf, size_t len) | |
395 | { | |
396 | if (!capable(CAP_NET_ADMIN)) | |
397 | return -EPERM; | |
398 | ||
399 | return netdev_store(dev, attr, buf, len, change_napi_defer_hard_irqs); | |
400 | } | |
401 | NETDEVICE_SHOW_RW(napi_defer_hard_irqs, fmt_dec); | |
402 | ||
6be8aeef | 403 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
404 | const char *buf, size_t len) |
405 | { | |
406 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 407 | struct net *net = dev_net(netdev); |
0b815a1a | 408 | size_t count = len; |
c92eb77a | 409 | ssize_t ret = 0; |
0b815a1a | 410 | |
5e1fccc0 | 411 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
412 | return -EPERM; |
413 | ||
414 | /* ignore trailing newline */ | |
415 | if (len > 0 && buf[len - 1] == '\n') | |
416 | --count; | |
417 | ||
c92eb77a RP |
418 | if (!rtnl_trylock()) |
419 | return restart_syscall(); | |
0b815a1a | 420 | |
c92eb77a RP |
421 | if (dev_isalive(netdev)) { |
422 | ret = dev_set_alias(netdev, buf, count); | |
423 | if (ret < 0) | |
424 | goto err; | |
425 | ret = len; | |
426 | netdev_state_change(netdev); | |
427 | } | |
428 | err: | |
429 | rtnl_unlock(); | |
430 | ||
431 | return ret; | |
0b815a1a SH |
432 | } |
433 | ||
6be8aeef | 434 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
435 | struct device_attribute *attr, char *buf) |
436 | { | |
437 | const struct net_device *netdev = to_net_dev(dev); | |
6c557001 | 438 | char tmp[IFALIASZ]; |
0b815a1a SH |
439 | ssize_t ret = 0; |
440 | ||
6c557001 FW |
441 | ret = dev_get_alias(netdev, tmp, sizeof(tmp)); |
442 | if (ret > 0) | |
443 | ret = sprintf(buf, "%s\n", tmp); | |
0b815a1a SH |
444 | return ret; |
445 | } | |
6be8aeef | 446 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 447 | |
6b53dafe | 448 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 449 | { |
6648c65e | 450 | dev_set_group(dev, (int)new_group); |
a512b92b VD |
451 | return 0; |
452 | } | |
453 | ||
6be8aeef GKH |
454 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
455 | const char *buf, size_t len) | |
a512b92b VD |
456 | { |
457 | return netdev_store(dev, attr, buf, len, change_group); | |
458 | } | |
6be8aeef | 459 | NETDEVICE_SHOW(group, fmt_dec); |
d6444062 | 460 | static DEVICE_ATTR(netdev_group, 0644, group_show, group_store); |
6be8aeef | 461 | |
d746d707 AK |
462 | static int change_proto_down(struct net_device *dev, unsigned long proto_down) |
463 | { | |
6648c65e | 464 | return dev_change_proto_down(dev, (bool)proto_down); |
d746d707 AK |
465 | } |
466 | ||
467 | static ssize_t proto_down_store(struct device *dev, | |
468 | struct device_attribute *attr, | |
469 | const char *buf, size_t len) | |
470 | { | |
471 | return netdev_store(dev, attr, buf, len, change_proto_down); | |
472 | } | |
473 | NETDEVICE_SHOW_RW(proto_down, fmt_dec); | |
474 | ||
cc998ff8 | 475 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
476 | struct device_attribute *attr, char *buf) |
477 | { | |
478 | struct net_device *netdev = to_net_dev(dev); | |
479 | ssize_t ret = -EINVAL; | |
480 | ||
481 | if (!rtnl_trylock()) | |
482 | return restart_syscall(); | |
483 | ||
484 | if (dev_isalive(netdev)) { | |
02637fce | 485 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
486 | |
487 | ret = dev_get_phys_port_id(netdev, &ppid); | |
488 | if (!ret) | |
489 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
490 | } | |
491 | rtnl_unlock(); | |
492 | ||
493 | return ret; | |
494 | } | |
cc998ff8 LT |
495 | static DEVICE_ATTR_RO(phys_port_id); |
496 | ||
db24a904 DA |
497 | static ssize_t phys_port_name_show(struct device *dev, |
498 | struct device_attribute *attr, char *buf) | |
499 | { | |
500 | struct net_device *netdev = to_net_dev(dev); | |
501 | ssize_t ret = -EINVAL; | |
502 | ||
503 | if (!rtnl_trylock()) | |
504 | return restart_syscall(); | |
505 | ||
506 | if (dev_isalive(netdev)) { | |
507 | char name[IFNAMSIZ]; | |
508 | ||
509 | ret = dev_get_phys_port_name(netdev, name, sizeof(name)); | |
510 | if (!ret) | |
511 | ret = sprintf(buf, "%s\n", name); | |
512 | } | |
513 | rtnl_unlock(); | |
514 | ||
515 | return ret; | |
516 | } | |
517 | static DEVICE_ATTR_RO(phys_port_name); | |
518 | ||
aecbe01e JP |
519 | static ssize_t phys_switch_id_show(struct device *dev, |
520 | struct device_attribute *attr, char *buf) | |
521 | { | |
522 | struct net_device *netdev = to_net_dev(dev); | |
523 | ssize_t ret = -EINVAL; | |
524 | ||
525 | if (!rtnl_trylock()) | |
526 | return restart_syscall(); | |
527 | ||
528 | if (dev_isalive(netdev)) { | |
bccb3025 FF |
529 | struct netdev_phys_item_id ppid = { }; |
530 | ||
531 | ret = dev_get_port_parent_id(netdev, &ppid, false); | |
aecbe01e | 532 | if (!ret) |
bccb3025 | 533 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); |
aecbe01e JP |
534 | } |
535 | rtnl_unlock(); | |
536 | ||
537 | return ret; | |
538 | } | |
539 | static DEVICE_ATTR_RO(phys_switch_id); | |
540 | ||
ec6cc599 | 541 | static struct attribute *net_class_attrs[] __ro_after_init = { |
6be8aeef GKH |
542 | &dev_attr_netdev_group.attr, |
543 | &dev_attr_type.attr, | |
544 | &dev_attr_dev_id.attr, | |
3f85944f | 545 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
546 | &dev_attr_iflink.attr, |
547 | &dev_attr_ifindex.attr, | |
685343fc | 548 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
549 | &dev_attr_addr_assign_type.attr, |
550 | &dev_attr_addr_len.attr, | |
551 | &dev_attr_link_mode.attr, | |
552 | &dev_attr_address.attr, | |
553 | &dev_attr_broadcast.attr, | |
554 | &dev_attr_speed.attr, | |
555 | &dev_attr_duplex.attr, | |
556 | &dev_attr_dormant.attr, | |
db30a577 | 557 | &dev_attr_testing.attr, |
6be8aeef | 558 | &dev_attr_operstate.attr, |
2d3b479d | 559 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
560 | &dev_attr_ifalias.attr, |
561 | &dev_attr_carrier.attr, | |
562 | &dev_attr_mtu.attr, | |
563 | &dev_attr_flags.attr, | |
564 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 565 | &dev_attr_gro_flush_timeout.attr, |
6f8b12d6 | 566 | &dev_attr_napi_defer_hard_irqs.attr, |
cc998ff8 | 567 | &dev_attr_phys_port_id.attr, |
db24a904 | 568 | &dev_attr_phys_port_name.attr, |
aecbe01e | 569 | &dev_attr_phys_switch_id.attr, |
d746d707 | 570 | &dev_attr_proto_down.attr, |
b2d3bcfa DD |
571 | &dev_attr_carrier_up_count.attr, |
572 | &dev_attr_carrier_down_count.attr, | |
6be8aeef | 573 | NULL, |
1da177e4 | 574 | }; |
6be8aeef | 575 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
576 | |
577 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
578 | static ssize_t netstat_show(const struct device *d, |
579 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
580 | unsigned long offset) |
581 | { | |
43cb76d9 | 582 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
583 | ssize_t ret = -EINVAL; |
584 | ||
be1f3c2c | 585 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
6648c65e | 586 | offset % sizeof(u64) != 0); |
1da177e4 LT |
587 | |
588 | read_lock(&dev_base_lock); | |
96e74088 | 589 | if (dev_isalive(dev)) { |
28172739 ED |
590 | struct rtnl_link_stats64 temp; |
591 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
592 | ||
6648c65e | 593 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *)stats) + offset)); |
96e74088 | 594 | } |
1da177e4 LT |
595 | read_unlock(&dev_base_lock); |
596 | return ret; | |
597 | } | |
598 | ||
599 | /* generate a read-only statistics attribute */ | |
600 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 601 | static ssize_t name##_show(struct device *d, \ |
6648c65e | 602 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 603 | { \ |
43cb76d9 | 604 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 605 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 606 | } \ |
6be8aeef | 607 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
608 | |
609 | NETSTAT_ENTRY(rx_packets); | |
610 | NETSTAT_ENTRY(tx_packets); | |
611 | NETSTAT_ENTRY(rx_bytes); | |
612 | NETSTAT_ENTRY(tx_bytes); | |
613 | NETSTAT_ENTRY(rx_errors); | |
614 | NETSTAT_ENTRY(tx_errors); | |
615 | NETSTAT_ENTRY(rx_dropped); | |
616 | NETSTAT_ENTRY(tx_dropped); | |
617 | NETSTAT_ENTRY(multicast); | |
618 | NETSTAT_ENTRY(collisions); | |
619 | NETSTAT_ENTRY(rx_length_errors); | |
620 | NETSTAT_ENTRY(rx_over_errors); | |
621 | NETSTAT_ENTRY(rx_crc_errors); | |
622 | NETSTAT_ENTRY(rx_frame_errors); | |
623 | NETSTAT_ENTRY(rx_fifo_errors); | |
624 | NETSTAT_ENTRY(rx_missed_errors); | |
625 | NETSTAT_ENTRY(tx_aborted_errors); | |
626 | NETSTAT_ENTRY(tx_carrier_errors); | |
627 | NETSTAT_ENTRY(tx_fifo_errors); | |
628 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
629 | NETSTAT_ENTRY(tx_window_errors); | |
630 | NETSTAT_ENTRY(rx_compressed); | |
631 | NETSTAT_ENTRY(tx_compressed); | |
6e7333d3 | 632 | NETSTAT_ENTRY(rx_nohandler); |
1da177e4 | 633 | |
ec6cc599 | 634 | static struct attribute *netstat_attrs[] __ro_after_init = { |
43cb76d9 GKH |
635 | &dev_attr_rx_packets.attr, |
636 | &dev_attr_tx_packets.attr, | |
637 | &dev_attr_rx_bytes.attr, | |
638 | &dev_attr_tx_bytes.attr, | |
639 | &dev_attr_rx_errors.attr, | |
640 | &dev_attr_tx_errors.attr, | |
641 | &dev_attr_rx_dropped.attr, | |
642 | &dev_attr_tx_dropped.attr, | |
643 | &dev_attr_multicast.attr, | |
644 | &dev_attr_collisions.attr, | |
645 | &dev_attr_rx_length_errors.attr, | |
646 | &dev_attr_rx_over_errors.attr, | |
647 | &dev_attr_rx_crc_errors.attr, | |
648 | &dev_attr_rx_frame_errors.attr, | |
649 | &dev_attr_rx_fifo_errors.attr, | |
650 | &dev_attr_rx_missed_errors.attr, | |
651 | &dev_attr_tx_aborted_errors.attr, | |
652 | &dev_attr_tx_carrier_errors.attr, | |
653 | &dev_attr_tx_fifo_errors.attr, | |
654 | &dev_attr_tx_heartbeat_errors.attr, | |
655 | &dev_attr_tx_window_errors.attr, | |
656 | &dev_attr_rx_compressed.attr, | |
657 | &dev_attr_tx_compressed.attr, | |
6e7333d3 | 658 | &dev_attr_rx_nohandler.attr, |
1da177e4 LT |
659 | NULL |
660 | }; | |
661 | ||
38ef00cc | 662 | static const struct attribute_group netstat_group = { |
1da177e4 LT |
663 | .name = "statistics", |
664 | .attrs = netstat_attrs, | |
665 | }; | |
38c1a01c JB |
666 | |
667 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
668 | static struct attribute *wireless_attrs[] = { | |
669 | NULL | |
670 | }; | |
671 | ||
38ef00cc | 672 | static const struct attribute_group wireless_group = { |
38c1a01c JB |
673 | .name = "wireless", |
674 | .attrs = wireless_attrs, | |
675 | }; | |
676 | #endif | |
6be8aeef GKH |
677 | |
678 | #else /* CONFIG_SYSFS */ | |
679 | #define net_class_groups NULL | |
d6523ddf | 680 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 681 | |
a953be53 | 682 | #ifdef CONFIG_SYSFS |
6648c65e | 683 | #define to_rx_queue_attr(_attr) \ |
684 | container_of(_attr, struct rx_queue_attribute, attr) | |
0a9627f2 TH |
685 | |
686 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
687 | ||
688 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
689 | char *buf) | |
690 | { | |
667e427b | 691 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
692 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
693 | ||
694 | if (!attribute->show) | |
695 | return -EIO; | |
696 | ||
718ad681 | 697 | return attribute->show(queue, buf); |
0a9627f2 TH |
698 | } |
699 | ||
700 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
701 | const char *buf, size_t count) | |
702 | { | |
667e427b | 703 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
704 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
705 | ||
706 | if (!attribute->store) | |
707 | return -EIO; | |
708 | ||
718ad681 | 709 | return attribute->store(queue, buf, count); |
0a9627f2 TH |
710 | } |
711 | ||
fa50d645 | 712 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
713 | .show = rx_queue_attr_show, |
714 | .store = rx_queue_attr_store, | |
715 | }; | |
716 | ||
a953be53 | 717 | #ifdef CONFIG_RPS |
718ad681 | 718 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf) |
0a9627f2 TH |
719 | { |
720 | struct rps_map *map; | |
721 | cpumask_var_t mask; | |
f0906827 | 722 | int i, len; |
0a9627f2 TH |
723 | |
724 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
725 | return -ENOMEM; | |
726 | ||
727 | rcu_read_lock(); | |
728 | map = rcu_dereference(queue->rps_map); | |
729 | if (map) | |
730 | for (i = 0; i < map->len; i++) | |
731 | cpumask_set_cpu(map->cpus[i], mask); | |
732 | ||
f0906827 | 733 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 734 | rcu_read_unlock(); |
0a9627f2 | 735 | free_cpumask_var(mask); |
f0906827 TH |
736 | |
737 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
738 | } |
739 | ||
f5acb907 | 740 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
718ad681 | 741 | const char *buf, size_t len) |
0a9627f2 TH |
742 | { |
743 | struct rps_map *old_map, *map; | |
744 | cpumask_var_t mask; | |
07bbecb3 | 745 | int err, cpu, i, hk_flags; |
da65ad1f | 746 | static DEFINE_MUTEX(rps_map_mutex); |
0a9627f2 TH |
747 | |
748 | if (!capable(CAP_NET_ADMIN)) | |
749 | return -EPERM; | |
750 | ||
751 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
752 | return -ENOMEM; | |
753 | ||
754 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
755 | if (err) { | |
756 | free_cpumask_var(mask); | |
757 | return err; | |
758 | } | |
759 | ||
2e0d8fef ED |
760 | if (!cpumask_empty(mask)) { |
761 | hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ; | |
762 | cpumask_and(mask, mask, housekeeping_cpumask(hk_flags)); | |
763 | if (cpumask_empty(mask)) { | |
764 | free_cpumask_var(mask); | |
765 | return -EINVAL; | |
766 | } | |
07bbecb3 AB |
767 | } |
768 | ||
95c96174 | 769 | map = kzalloc(max_t(unsigned int, |
6648c65e | 770 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
771 | GFP_KERNEL); | |
0a9627f2 TH |
772 | if (!map) { |
773 | free_cpumask_var(mask); | |
774 | return -ENOMEM; | |
775 | } | |
776 | ||
777 | i = 0; | |
778 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
779 | map->cpus[i++] = cpu; | |
780 | ||
6648c65e | 781 | if (i) { |
0a9627f2 | 782 | map->len = i; |
6648c65e | 783 | } else { |
0a9627f2 TH |
784 | kfree(map); |
785 | map = NULL; | |
786 | } | |
787 | ||
da65ad1f | 788 | mutex_lock(&rps_map_mutex); |
6e3f7faf | 789 | old_map = rcu_dereference_protected(queue->rps_map, |
da65ad1f | 790 | mutex_is_locked(&rps_map_mutex)); |
0a9627f2 | 791 | rcu_assign_pointer(queue->rps_map, map); |
0a9627f2 | 792 | |
adc9300e | 793 | if (map) |
dc05360f | 794 | static_branch_inc(&rps_needed); |
10e4ea75 | 795 | if (old_map) |
dc05360f | 796 | static_branch_dec(&rps_needed); |
10e4ea75 | 797 | |
da65ad1f | 798 | mutex_unlock(&rps_map_mutex); |
10e4ea75 TH |
799 | |
800 | if (old_map) | |
801 | kfree_rcu(old_map, rcu); | |
802 | ||
0a9627f2 TH |
803 | free_cpumask_var(mask); |
804 | return len; | |
805 | } | |
806 | ||
fec5e652 | 807 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
808 | char *buf) |
809 | { | |
810 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 811 | unsigned long val = 0; |
fec5e652 TH |
812 | |
813 | rcu_read_lock(); | |
814 | flow_table = rcu_dereference(queue->rps_flow_table); | |
815 | if (flow_table) | |
60b778ce | 816 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
817 | rcu_read_unlock(); |
818 | ||
60b778ce | 819 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
820 | } |
821 | ||
fec5e652 TH |
822 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
823 | { | |
824 | struct rps_dev_flow_table *table = container_of(rcu, | |
825 | struct rps_dev_flow_table, rcu); | |
243198d0 | 826 | vfree(table); |
fec5e652 TH |
827 | } |
828 | ||
f5acb907 | 829 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
718ad681 | 830 | const char *buf, size_t len) |
fec5e652 | 831 | { |
60b778ce | 832 | unsigned long mask, count; |
fec5e652 TH |
833 | struct rps_dev_flow_table *table, *old_table; |
834 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 835 | int rc; |
fec5e652 TH |
836 | |
837 | if (!capable(CAP_NET_ADMIN)) | |
838 | return -EPERM; | |
839 | ||
60b778ce ED |
840 | rc = kstrtoul(buf, 0, &count); |
841 | if (rc < 0) | |
842 | return rc; | |
fec5e652 TH |
843 | |
844 | if (count) { | |
60b778ce ED |
845 | mask = count - 1; |
846 | /* mask = roundup_pow_of_two(count) - 1; | |
847 | * without overflows... | |
848 | */ | |
849 | while ((mask | (mask >> 1)) != mask) | |
850 | mask |= (mask >> 1); | |
851 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 852 | * and on 32bit arches, must check |
853 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
854 | */ |
855 | #if BITS_PER_LONG > 32 | |
856 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 857 | return -EINVAL; |
60b778ce ED |
858 | #else |
859 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 860 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
861 | /* Enforce a limit to prevent overflow */ |
862 | return -EINVAL; | |
863 | } | |
60b778ce ED |
864 | #endif |
865 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
866 | if (!table) |
867 | return -ENOMEM; | |
868 | ||
60b778ce ED |
869 | table->mask = mask; |
870 | for (count = 0; count <= mask; count++) | |
871 | table->flows[count].cpu = RPS_NO_CPU; | |
6648c65e | 872 | } else { |
fec5e652 | 873 | table = NULL; |
6648c65e | 874 | } |
fec5e652 TH |
875 | |
876 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
877 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
878 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
879 | rcu_assign_pointer(queue->rps_flow_table, table); |
880 | spin_unlock(&rps_dev_flow_lock); | |
881 | ||
882 | if (old_table) | |
883 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
884 | ||
885 | return len; | |
886 | } | |
887 | ||
667e427b | 888 | static struct rx_queue_attribute rps_cpus_attribute __ro_after_init |
d6444062 | 889 | = __ATTR(rps_cpus, 0644, show_rps_map, store_rps_map); |
0a9627f2 | 890 | |
667e427b | 891 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute __ro_after_init |
d6444062 | 892 | = __ATTR(rps_flow_cnt, 0644, |
667e427b | 893 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); |
a953be53 | 894 | #endif /* CONFIG_RPS */ |
fec5e652 | 895 | |
667e427b | 896 | static struct attribute *rx_queue_default_attrs[] __ro_after_init = { |
a953be53 | 897 | #ifdef CONFIG_RPS |
0a9627f2 | 898 | &rps_cpus_attribute.attr, |
fec5e652 | 899 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 900 | #endif |
0a9627f2 TH |
901 | NULL |
902 | }; | |
be0d6926 | 903 | ATTRIBUTE_GROUPS(rx_queue_default); |
0a9627f2 TH |
904 | |
905 | static void rx_queue_release(struct kobject *kobj) | |
906 | { | |
907 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 908 | #ifdef CONFIG_RPS |
6e3f7faf ED |
909 | struct rps_map *map; |
910 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 911 | |
33d480ce | 912 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
913 | if (map) { |
914 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 915 | kfree_rcu(map, rcu); |
9ea19481 | 916 | } |
6e3f7faf | 917 | |
33d480ce | 918 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
919 | if (flow_table) { |
920 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 921 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 922 | } |
a953be53 | 923 | #endif |
0a9627f2 | 924 | |
9ea19481 | 925 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 926 | dev_put(queue->dev); |
0a9627f2 TH |
927 | } |
928 | ||
82ef3d5d WC |
929 | static const void *rx_queue_namespace(struct kobject *kobj) |
930 | { | |
931 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
932 | struct device *dev = &queue->dev->dev; | |
933 | const void *ns = NULL; | |
934 | ||
935 | if (dev->class && dev->class->ns_type) | |
936 | ns = dev->class->namespace(dev); | |
937 | ||
938 | return ns; | |
939 | } | |
940 | ||
b0e37c0d DT |
941 | static void rx_queue_get_ownership(struct kobject *kobj, |
942 | kuid_t *uid, kgid_t *gid) | |
943 | { | |
944 | const struct net *net = rx_queue_namespace(kobj); | |
945 | ||
946 | net_ns_get_ownership(net, uid, gid); | |
947 | } | |
948 | ||
667e427b | 949 | static struct kobj_type rx_queue_ktype __ro_after_init = { |
0a9627f2 TH |
950 | .sysfs_ops = &rx_queue_sysfs_ops, |
951 | .release = rx_queue_release, | |
be0d6926 | 952 | .default_groups = rx_queue_default_groups, |
b0e37c0d DT |
953 | .namespace = rx_queue_namespace, |
954 | .get_ownership = rx_queue_get_ownership, | |
0a9627f2 TH |
955 | }; |
956 | ||
6b53dafe | 957 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 958 | { |
6b53dafe | 959 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
960 | struct kobject *kobj = &queue->kobj; |
961 | int error = 0; | |
962 | ||
ddd9b5e3 JH |
963 | /* Kobject_put later will trigger rx_queue_release call which |
964 | * decreases dev refcount: Take that reference here | |
965 | */ | |
966 | dev_hold(queue->dev); | |
967 | ||
6b53dafe | 968 | kobj->kset = dev->queues_kset; |
0a9627f2 | 969 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
6648c65e | 970 | "rx-%u", index); |
a953be53 | 971 | if (error) |
b8eb7183 | 972 | goto err; |
a953be53 | 973 | |
6b53dafe WC |
974 | if (dev->sysfs_rx_queue_group) { |
975 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
b8eb7183 JH |
976 | if (error) |
977 | goto err; | |
0a9627f2 TH |
978 | } |
979 | ||
980 | kobject_uevent(kobj, KOBJ_ADD); | |
981 | ||
982 | return error; | |
b8eb7183 JH |
983 | |
984 | err: | |
985 | kobject_put(kobj); | |
986 | return error; | |
0a9627f2 | 987 | } |
d755407d CB |
988 | |
989 | static int rx_queue_change_owner(struct net_device *dev, int index, kuid_t kuid, | |
990 | kgid_t kgid) | |
991 | { | |
992 | struct netdev_rx_queue *queue = dev->_rx + index; | |
993 | struct kobject *kobj = &queue->kobj; | |
994 | int error; | |
995 | ||
996 | error = sysfs_change_owner(kobj, kuid, kgid); | |
997 | if (error) | |
998 | return error; | |
999 | ||
1000 | if (dev->sysfs_rx_queue_group) | |
1001 | error = sysfs_group_change_owner( | |
1002 | kobj, dev->sysfs_rx_queue_group, kuid, kgid); | |
1003 | ||
1004 | return error; | |
1005 | } | |
80dd6eac | 1006 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 1007 | |
62fe0b40 | 1008 | int |
6b53dafe | 1009 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 1010 | { |
a953be53 | 1011 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1012 | int i; |
1013 | int error = 0; | |
1014 | ||
a953be53 | 1015 | #ifndef CONFIG_RPS |
6b53dafe | 1016 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
1017 | return 0; |
1018 | #endif | |
62fe0b40 | 1019 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 1020 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
1021 | if (error) { |
1022 | new_num = old_num; | |
0a9627f2 | 1023 | break; |
62fe0b40 | 1024 | } |
0a9627f2 TH |
1025 | } |
1026 | ||
a953be53 | 1027 | while (--i >= new_num) { |
002d8a1a AV |
1028 | struct kobject *kobj = &dev->_rx[i].kobj; |
1029 | ||
273c28bc | 1030 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 1031 | kobj->uevent_suppress = 1; |
6b53dafe | 1032 | if (dev->sysfs_rx_queue_group) |
002d8a1a AV |
1033 | sysfs_remove_group(kobj, dev->sysfs_rx_queue_group); |
1034 | kobject_put(kobj); | |
a953be53 | 1035 | } |
0a9627f2 TH |
1036 | |
1037 | return error; | |
bf264145 TH |
1038 | #else |
1039 | return 0; | |
1040 | #endif | |
0a9627f2 TH |
1041 | } |
1042 | ||
d755407d CB |
1043 | static int net_rx_queue_change_owner(struct net_device *dev, int num, |
1044 | kuid_t kuid, kgid_t kgid) | |
1045 | { | |
1046 | #ifdef CONFIG_SYSFS | |
1047 | int error = 0; | |
1048 | int i; | |
1049 | ||
1050 | #ifndef CONFIG_RPS | |
1051 | if (!dev->sysfs_rx_queue_group) | |
1052 | return 0; | |
1053 | #endif | |
1054 | for (i = 0; i < num; i++) { | |
1055 | error = rx_queue_change_owner(dev, i, kuid, kgid); | |
1056 | if (error) | |
1057 | break; | |
1058 | } | |
1059 | ||
1060 | return error; | |
1061 | #else | |
1062 | return 0; | |
1063 | #endif | |
1064 | } | |
1065 | ||
ccf5ff69 | 1066 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1067 | /* |
1068 | * netdev_queue sysfs structures and functions. | |
1069 | */ | |
1070 | struct netdev_queue_attribute { | |
1071 | struct attribute attr; | |
718ad681 | 1072 | ssize_t (*show)(struct netdev_queue *queue, char *buf); |
1d24eb48 | 1073 | ssize_t (*store)(struct netdev_queue *queue, |
718ad681 | 1074 | const char *buf, size_t len); |
1d24eb48 | 1075 | }; |
6648c65e | 1076 | #define to_netdev_queue_attr(_attr) \ |
1077 | container_of(_attr, struct netdev_queue_attribute, attr) | |
1d24eb48 TH |
1078 | |
1079 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
1080 | ||
1081 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
1082 | struct attribute *attr, char *buf) | |
1083 | { | |
667e427b | 1084 | const struct netdev_queue_attribute *attribute |
1085 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1086 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1087 | ||
1088 | if (!attribute->show) | |
1089 | return -EIO; | |
1090 | ||
718ad681 | 1091 | return attribute->show(queue, buf); |
1d24eb48 TH |
1092 | } |
1093 | ||
1094 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
1095 | struct attribute *attr, | |
1096 | const char *buf, size_t count) | |
1097 | { | |
667e427b | 1098 | const struct netdev_queue_attribute *attribute |
1099 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1100 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1101 | ||
1102 | if (!attribute->store) | |
1103 | return -EIO; | |
1104 | ||
718ad681 | 1105 | return attribute->store(queue, buf, count); |
1d24eb48 TH |
1106 | } |
1107 | ||
1108 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
1109 | .show = netdev_queue_attr_show, | |
1110 | .store = netdev_queue_attr_store, | |
1111 | }; | |
1112 | ||
2b9c7581 | 1113 | static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf) |
ccf5ff69 | 1114 | { |
1115 | unsigned long trans_timeout; | |
1116 | ||
1117 | spin_lock_irq(&queue->_xmit_lock); | |
1118 | trans_timeout = queue->trans_timeout; | |
1119 | spin_unlock_irq(&queue->_xmit_lock); | |
1120 | ||
9bb5fbea | 1121 | return sprintf(buf, fmt_ulong, trans_timeout); |
ccf5ff69 | 1122 | } |
1123 | ||
c4047f53 | 1124 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
822b3b2e JF |
1125 | { |
1126 | struct net_device *dev = queue->dev; | |
c4047f53 | 1127 | unsigned int i; |
822b3b2e | 1128 | |
c4047f53 | 1129 | i = queue - dev->_tx; |
822b3b2e JF |
1130 | BUG_ON(i >= dev->num_tx_queues); |
1131 | ||
1132 | return i; | |
1133 | } | |
1134 | ||
2b9c7581 | 1135 | static ssize_t traffic_class_show(struct netdev_queue *queue, |
8d059b0f AD |
1136 | char *buf) |
1137 | { | |
1138 | struct net_device *dev = queue->dev; | |
d7be9775 AD |
1139 | int index; |
1140 | int tc; | |
8d059b0f | 1141 | |
d7be9775 AD |
1142 | if (!netif_is_multiqueue(dev)) |
1143 | return -ENOENT; | |
1144 | ||
1145 | index = get_netdev_queue_index(queue); | |
ffcfe25b AD |
1146 | |
1147 | /* If queue belongs to subordinate dev use its TC mapping */ | |
1148 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1149 | ||
d7be9775 | 1150 | tc = netdev_txq_to_tc(dev, index); |
8d059b0f AD |
1151 | if (tc < 0) |
1152 | return -EINVAL; | |
1153 | ||
ffcfe25b AD |
1154 | /* We can report the traffic class one of two ways: |
1155 | * Subordinate device traffic classes are reported with the traffic | |
1156 | * class first, and then the subordinate class so for example TC0 on | |
1157 | * subordinate device 2 will be reported as "0-2". If the queue | |
1158 | * belongs to the root device it will be reported with just the | |
1159 | * traffic class, so just "0" for TC 0 for example. | |
1160 | */ | |
000fe268 YB |
1161 | return dev->num_tc < 0 ? sprintf(buf, "%d%d\n", tc, dev->num_tc) : |
1162 | sprintf(buf, "%d\n", tc); | |
8d059b0f AD |
1163 | } |
1164 | ||
1165 | #ifdef CONFIG_XPS | |
2b9c7581 | 1166 | static ssize_t tx_maxrate_show(struct netdev_queue *queue, |
822b3b2e JF |
1167 | char *buf) |
1168 | { | |
1169 | return sprintf(buf, "%lu\n", queue->tx_maxrate); | |
1170 | } | |
1171 | ||
2b9c7581 | 1172 | static ssize_t tx_maxrate_store(struct netdev_queue *queue, |
1173 | const char *buf, size_t len) | |
822b3b2e JF |
1174 | { |
1175 | struct net_device *dev = queue->dev; | |
1176 | int err, index = get_netdev_queue_index(queue); | |
1177 | u32 rate = 0; | |
1178 | ||
3033fced TH |
1179 | if (!capable(CAP_NET_ADMIN)) |
1180 | return -EPERM; | |
1181 | ||
822b3b2e JF |
1182 | err = kstrtou32(buf, 10, &rate); |
1183 | if (err < 0) | |
1184 | return err; | |
1185 | ||
1186 | if (!rtnl_trylock()) | |
1187 | return restart_syscall(); | |
1188 | ||
1189 | err = -EOPNOTSUPP; | |
1190 | if (dev->netdev_ops->ndo_set_tx_maxrate) | |
1191 | err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); | |
1192 | ||
1193 | rtnl_unlock(); | |
1194 | if (!err) { | |
1195 | queue->tx_maxrate = rate; | |
1196 | return len; | |
1197 | } | |
1198 | return err; | |
1199 | } | |
1200 | ||
2b9c7581 | 1201 | static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init |
1202 | = __ATTR_RW(tx_maxrate); | |
822b3b2e JF |
1203 | #endif |
1204 | ||
2b9c7581 | 1205 | static struct netdev_queue_attribute queue_trans_timeout __ro_after_init |
1206 | = __ATTR_RO(tx_timeout); | |
ccf5ff69 | 1207 | |
2b9c7581 | 1208 | static struct netdev_queue_attribute queue_traffic_class __ro_after_init |
1209 | = __ATTR_RO(traffic_class); | |
8d059b0f | 1210 | |
114cf580 TH |
1211 | #ifdef CONFIG_BQL |
1212 | /* | |
1213 | * Byte queue limits sysfs structures and functions. | |
1214 | */ | |
1215 | static ssize_t bql_show(char *buf, unsigned int value) | |
1216 | { | |
1217 | return sprintf(buf, "%u\n", value); | |
1218 | } | |
1219 | ||
1220 | static ssize_t bql_set(const char *buf, const size_t count, | |
1221 | unsigned int *pvalue) | |
1222 | { | |
1223 | unsigned int value; | |
1224 | int err; | |
1225 | ||
6648c65e | 1226 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) { |
114cf580 | 1227 | value = DQL_MAX_LIMIT; |
6648c65e | 1228 | } else { |
114cf580 TH |
1229 | err = kstrtouint(buf, 10, &value); |
1230 | if (err < 0) | |
1231 | return err; | |
1232 | if (value > DQL_MAX_LIMIT) | |
1233 | return -EINVAL; | |
1234 | } | |
1235 | ||
1236 | *pvalue = value; | |
1237 | ||
1238 | return count; | |
1239 | } | |
1240 | ||
1241 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1242 | char *buf) |
1243 | { | |
1244 | struct dql *dql = &queue->dql; | |
1245 | ||
1246 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
1247 | } | |
1248 | ||
1249 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1250 | const char *buf, size_t len) |
1251 | { | |
1252 | struct dql *dql = &queue->dql; | |
95c96174 | 1253 | unsigned int value; |
114cf580 TH |
1254 | int err; |
1255 | ||
1256 | err = kstrtouint(buf, 10, &value); | |
1257 | if (err < 0) | |
1258 | return err; | |
1259 | ||
1260 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1261 | ||
1262 | return len; | |
1263 | } | |
1264 | ||
170c658a | 1265 | static struct netdev_queue_attribute bql_hold_time_attribute __ro_after_init |
d6444062 | 1266 | = __ATTR(hold_time, 0644, |
170c658a | 1267 | bql_show_hold_time, bql_set_hold_time); |
114cf580 TH |
1268 | |
1269 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
114cf580 TH |
1270 | char *buf) |
1271 | { | |
1272 | struct dql *dql = &queue->dql; | |
1273 | ||
1274 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
1275 | } | |
1276 | ||
170c658a | 1277 | static struct netdev_queue_attribute bql_inflight_attribute __ro_after_init = |
d6444062 | 1278 | __ATTR(inflight, 0444, bql_show_inflight, NULL); |
114cf580 TH |
1279 | |
1280 | #define BQL_ATTR(NAME, FIELD) \ | |
1281 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1282 | char *buf) \ |
1283 | { \ | |
1284 | return bql_show(buf, queue->dql.FIELD); \ | |
1285 | } \ | |
1286 | \ | |
1287 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1288 | const char *buf, size_t len) \ |
1289 | { \ | |
1290 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1291 | } \ | |
1292 | \ | |
170c658a | 1293 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute __ro_after_init \ |
d6444062 | 1294 | = __ATTR(NAME, 0644, \ |
170c658a | 1295 | bql_show_ ## NAME, bql_set_ ## NAME) |
114cf580 | 1296 | |
170c658a | 1297 | BQL_ATTR(limit, limit); |
1298 | BQL_ATTR(limit_max, max_limit); | |
1299 | BQL_ATTR(limit_min, min_limit); | |
114cf580 | 1300 | |
170c658a | 1301 | static struct attribute *dql_attrs[] __ro_after_init = { |
114cf580 TH |
1302 | &bql_limit_attribute.attr, |
1303 | &bql_limit_max_attribute.attr, | |
1304 | &bql_limit_min_attribute.attr, | |
1305 | &bql_hold_time_attribute.attr, | |
1306 | &bql_inflight_attribute.attr, | |
1307 | NULL | |
1308 | }; | |
1309 | ||
38ef00cc | 1310 | static const struct attribute_group dql_group = { |
114cf580 TH |
1311 | .name = "byte_queue_limits", |
1312 | .attrs = dql_attrs, | |
1313 | }; | |
1314 | #endif /* CONFIG_BQL */ | |
1315 | ||
ccf5ff69 | 1316 | #ifdef CONFIG_XPS |
2b9c7581 | 1317 | static ssize_t xps_cpus_show(struct netdev_queue *queue, |
1318 | char *buf) | |
1d24eb48 TH |
1319 | { |
1320 | struct net_device *dev = queue->dev; | |
184c449f | 1321 | int cpu, len, num_tc = 1, tc = 0; |
1d24eb48 TH |
1322 | struct xps_dev_maps *dev_maps; |
1323 | cpumask_var_t mask; | |
1324 | unsigned long index; | |
1d24eb48 | 1325 | |
d7be9775 AD |
1326 | if (!netif_is_multiqueue(dev)) |
1327 | return -ENOENT; | |
1328 | ||
1d24eb48 TH |
1329 | index = get_netdev_queue_index(queue); |
1330 | ||
184c449f | 1331 | if (dev->num_tc) { |
ffcfe25b | 1332 | /* Do not allow XPS on subordinate device directly */ |
184c449f | 1333 | num_tc = dev->num_tc; |
ffcfe25b AD |
1334 | if (num_tc < 0) |
1335 | return -EINVAL; | |
1336 | ||
1337 | /* If queue belongs to subordinate dev use its map */ | |
1338 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1339 | ||
184c449f AD |
1340 | tc = netdev_txq_to_tc(dev, index); |
1341 | if (tc < 0) | |
1342 | return -EINVAL; | |
1343 | } | |
1344 | ||
664088f8 AD |
1345 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) |
1346 | return -ENOMEM; | |
1347 | ||
1d24eb48 | 1348 | rcu_read_lock(); |
80d19669 | 1349 | dev_maps = rcu_dereference(dev->xps_cpus_map); |
1d24eb48 | 1350 | if (dev_maps) { |
184c449f AD |
1351 | for_each_possible_cpu(cpu) { |
1352 | int i, tci = cpu * num_tc + tc; | |
1353 | struct xps_map *map; | |
1354 | ||
80d19669 | 1355 | map = rcu_dereference(dev_maps->attr_map[tci]); |
184c449f AD |
1356 | if (!map) |
1357 | continue; | |
1358 | ||
1359 | for (i = map->len; i--;) { | |
1360 | if (map->queues[i] == index) { | |
1361 | cpumask_set_cpu(cpu, mask); | |
1362 | break; | |
1d24eb48 TH |
1363 | } |
1364 | } | |
1365 | } | |
1366 | } | |
1367 | rcu_read_unlock(); | |
1368 | ||
f0906827 | 1369 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
1d24eb48 | 1370 | free_cpumask_var(mask); |
f0906827 | 1371 | return len < PAGE_SIZE ? len : -EINVAL; |
1d24eb48 TH |
1372 | } |
1373 | ||
2b9c7581 | 1374 | static ssize_t xps_cpus_store(struct netdev_queue *queue, |
1375 | const char *buf, size_t len) | |
1d24eb48 TH |
1376 | { |
1377 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1378 | unsigned long index; |
537c00de AD |
1379 | cpumask_var_t mask; |
1380 | int err; | |
1d24eb48 | 1381 | |
d7be9775 AD |
1382 | if (!netif_is_multiqueue(dev)) |
1383 | return -ENOENT; | |
1384 | ||
1d24eb48 TH |
1385 | if (!capable(CAP_NET_ADMIN)) |
1386 | return -EPERM; | |
1387 | ||
1388 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1389 | return -ENOMEM; | |
1390 | ||
1391 | index = get_netdev_queue_index(queue); | |
1392 | ||
1393 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1394 | if (err) { | |
1395 | free_cpumask_var(mask); | |
1396 | return err; | |
1397 | } | |
1398 | ||
537c00de | 1399 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1400 | |
1401 | free_cpumask_var(mask); | |
1d24eb48 | 1402 | |
537c00de | 1403 | return err ? : len; |
1d24eb48 TH |
1404 | } |
1405 | ||
2b9c7581 | 1406 | static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init |
1407 | = __ATTR_RW(xps_cpus); | |
8af2c06f AN |
1408 | |
1409 | static ssize_t xps_rxqs_show(struct netdev_queue *queue, char *buf) | |
1410 | { | |
1411 | struct net_device *dev = queue->dev; | |
1412 | struct xps_dev_maps *dev_maps; | |
1413 | unsigned long *mask, index; | |
1414 | int j, len, num_tc = 1, tc = 0; | |
1415 | ||
1416 | index = get_netdev_queue_index(queue); | |
1417 | ||
1418 | if (dev->num_tc) { | |
1419 | num_tc = dev->num_tc; | |
1420 | tc = netdev_txq_to_tc(dev, index); | |
1421 | if (tc < 0) | |
1422 | return -EINVAL; | |
1423 | } | |
29ca1c5a | 1424 | mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL); |
8af2c06f AN |
1425 | if (!mask) |
1426 | return -ENOMEM; | |
1427 | ||
1428 | rcu_read_lock(); | |
1429 | dev_maps = rcu_dereference(dev->xps_rxqs_map); | |
1430 | if (!dev_maps) | |
1431 | goto out_no_maps; | |
1432 | ||
1433 | for (j = -1; j = netif_attrmask_next(j, NULL, dev->num_rx_queues), | |
1434 | j < dev->num_rx_queues;) { | |
1435 | int i, tci = j * num_tc + tc; | |
1436 | struct xps_map *map; | |
1437 | ||
1438 | map = rcu_dereference(dev_maps->attr_map[tci]); | |
1439 | if (!map) | |
1440 | continue; | |
1441 | ||
1442 | for (i = map->len; i--;) { | |
1443 | if (map->queues[i] == index) { | |
1444 | set_bit(j, mask); | |
1445 | break; | |
1446 | } | |
1447 | } | |
1448 | } | |
1449 | out_no_maps: | |
1450 | rcu_read_unlock(); | |
1451 | ||
1452 | len = bitmap_print_to_pagebuf(false, buf, mask, dev->num_rx_queues); | |
29ca1c5a | 1453 | bitmap_free(mask); |
8af2c06f AN |
1454 | |
1455 | return len < PAGE_SIZE ? len : -EINVAL; | |
1456 | } | |
1457 | ||
1458 | static ssize_t xps_rxqs_store(struct netdev_queue *queue, const char *buf, | |
1459 | size_t len) | |
1460 | { | |
1461 | struct net_device *dev = queue->dev; | |
1462 | struct net *net = dev_net(dev); | |
1463 | unsigned long *mask, index; | |
1464 | int err; | |
1465 | ||
1466 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1467 | return -EPERM; | |
1468 | ||
29ca1c5a | 1469 | mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL); |
8af2c06f AN |
1470 | if (!mask) |
1471 | return -ENOMEM; | |
1472 | ||
1473 | index = get_netdev_queue_index(queue); | |
1474 | ||
1475 | err = bitmap_parse(buf, len, mask, dev->num_rx_queues); | |
1476 | if (err) { | |
29ca1c5a | 1477 | bitmap_free(mask); |
8af2c06f AN |
1478 | return err; |
1479 | } | |
1480 | ||
4d99f660 | 1481 | cpus_read_lock(); |
8af2c06f | 1482 | err = __netif_set_xps_queue(dev, mask, index, true); |
4d99f660 AV |
1483 | cpus_read_unlock(); |
1484 | ||
29ca1c5a | 1485 | bitmap_free(mask); |
8af2c06f AN |
1486 | return err ? : len; |
1487 | } | |
1488 | ||
1489 | static struct netdev_queue_attribute xps_rxqs_attribute __ro_after_init | |
1490 | = __ATTR_RW(xps_rxqs); | |
ccf5ff69 | 1491 | #endif /* CONFIG_XPS */ |
1d24eb48 | 1492 | |
2b9c7581 | 1493 | static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { |
ccf5ff69 | 1494 | &queue_trans_timeout.attr, |
8d059b0f | 1495 | &queue_traffic_class.attr, |
ccf5ff69 | 1496 | #ifdef CONFIG_XPS |
1d24eb48 | 1497 | &xps_cpus_attribute.attr, |
8af2c06f | 1498 | &xps_rxqs_attribute.attr, |
822b3b2e | 1499 | &queue_tx_maxrate.attr, |
ccf5ff69 | 1500 | #endif |
1d24eb48 TH |
1501 | NULL |
1502 | }; | |
be0d6926 | 1503 | ATTRIBUTE_GROUPS(netdev_queue_default); |
1d24eb48 TH |
1504 | |
1505 | static void netdev_queue_release(struct kobject *kobj) | |
1506 | { | |
1507 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1508 | |
1d24eb48 TH |
1509 | memset(kobj, 0, sizeof(*kobj)); |
1510 | dev_put(queue->dev); | |
1511 | } | |
1512 | ||
82ef3d5d WC |
1513 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1514 | { | |
1515 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1516 | struct device *dev = &queue->dev->dev; | |
1517 | const void *ns = NULL; | |
1518 | ||
1519 | if (dev->class && dev->class->ns_type) | |
1520 | ns = dev->class->namespace(dev); | |
1521 | ||
1522 | return ns; | |
1523 | } | |
1524 | ||
b0e37c0d DT |
1525 | static void netdev_queue_get_ownership(struct kobject *kobj, |
1526 | kuid_t *uid, kgid_t *gid) | |
1527 | { | |
1528 | const struct net *net = netdev_queue_namespace(kobj); | |
1529 | ||
1530 | net_ns_get_ownership(net, uid, gid); | |
1531 | } | |
1532 | ||
2b9c7581 | 1533 | static struct kobj_type netdev_queue_ktype __ro_after_init = { |
1d24eb48 TH |
1534 | .sysfs_ops = &netdev_queue_sysfs_ops, |
1535 | .release = netdev_queue_release, | |
be0d6926 | 1536 | .default_groups = netdev_queue_default_groups, |
82ef3d5d | 1537 | .namespace = netdev_queue_namespace, |
b0e37c0d | 1538 | .get_ownership = netdev_queue_get_ownership, |
1d24eb48 TH |
1539 | }; |
1540 | ||
6b53dafe | 1541 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1542 | { |
6b53dafe | 1543 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1544 | struct kobject *kobj = &queue->kobj; |
1545 | int error = 0; | |
1546 | ||
e0b60903 JH |
1547 | /* Kobject_put later will trigger netdev_queue_release call |
1548 | * which decreases dev refcount: Take that reference here | |
1549 | */ | |
1550 | dev_hold(queue->dev); | |
1551 | ||
6b53dafe | 1552 | kobj->kset = dev->queues_kset; |
1d24eb48 | 1553 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
6648c65e | 1554 | "tx-%u", index); |
114cf580 | 1555 | if (error) |
b8eb7183 | 1556 | goto err; |
114cf580 TH |
1557 | |
1558 | #ifdef CONFIG_BQL | |
1559 | error = sysfs_create_group(kobj, &dql_group); | |
b8eb7183 JH |
1560 | if (error) |
1561 | goto err; | |
114cf580 | 1562 | #endif |
1d24eb48 TH |
1563 | |
1564 | kobject_uevent(kobj, KOBJ_ADD); | |
48a322b6 | 1565 | return 0; |
1d24eb48 | 1566 | |
b8eb7183 JH |
1567 | err: |
1568 | kobject_put(kobj); | |
1569 | return error; | |
1d24eb48 | 1570 | } |
d755407d CB |
1571 | |
1572 | static int tx_queue_change_owner(struct net_device *ndev, int index, | |
1573 | kuid_t kuid, kgid_t kgid) | |
1574 | { | |
1575 | struct netdev_queue *queue = ndev->_tx + index; | |
1576 | struct kobject *kobj = &queue->kobj; | |
1577 | int error; | |
1578 | ||
1579 | error = sysfs_change_owner(kobj, kuid, kgid); | |
1580 | if (error) | |
1581 | return error; | |
1582 | ||
1583 | #ifdef CONFIG_BQL | |
1584 | error = sysfs_group_change_owner(kobj, &dql_group, kuid, kgid); | |
1585 | #endif | |
1586 | return error; | |
1587 | } | |
ccf5ff69 | 1588 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1589 | |
1590 | int | |
6b53dafe | 1591 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1592 | { |
ccf5ff69 | 1593 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1594 | int i; |
1595 | int error = 0; | |
1596 | ||
1597 | for (i = old_num; i < new_num; i++) { | |
6b53dafe | 1598 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1599 | if (error) { |
1600 | new_num = old_num; | |
1601 | break; | |
1602 | } | |
1603 | } | |
1604 | ||
114cf580 | 1605 | while (--i >= new_num) { |
6b53dafe | 1606 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 | 1607 | |
273c28bc | 1608 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 1609 | queue->kobj.uevent_suppress = 1; |
114cf580 TH |
1610 | #ifdef CONFIG_BQL |
1611 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1612 | #endif | |
1613 | kobject_put(&queue->kobj); | |
1614 | } | |
1d24eb48 TH |
1615 | |
1616 | return error; | |
bf264145 TH |
1617 | #else |
1618 | return 0; | |
ccf5ff69 | 1619 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1620 | } |
1621 | ||
d755407d CB |
1622 | static int net_tx_queue_change_owner(struct net_device *dev, int num, |
1623 | kuid_t kuid, kgid_t kgid) | |
1624 | { | |
1625 | #ifdef CONFIG_SYSFS | |
1626 | int error = 0; | |
1627 | int i; | |
1628 | ||
1629 | for (i = 0; i < num; i++) { | |
1630 | error = tx_queue_change_owner(dev, i, kuid, kgid); | |
1631 | if (error) | |
1632 | break; | |
1633 | } | |
1634 | ||
1635 | return error; | |
1636 | #else | |
1637 | return 0; | |
1638 | #endif /* CONFIG_SYSFS */ | |
1639 | } | |
1640 | ||
6b53dafe | 1641 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1642 | { |
bf264145 | 1643 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1644 | |
ccf5ff69 | 1645 | #ifdef CONFIG_SYSFS |
6b53dafe | 1646 | dev->queues_kset = kset_create_and_add("queues", |
6648c65e | 1647 | NULL, &dev->dev.kobj); |
6b53dafe | 1648 | if (!dev->queues_kset) |
62fe0b40 | 1649 | return -ENOMEM; |
6b53dafe | 1650 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1651 | #endif |
6b53dafe | 1652 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1653 | |
6b53dafe | 1654 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1655 | if (error) |
1656 | goto error; | |
bf264145 | 1657 | rxq = real_rx; |
1d24eb48 | 1658 | |
6b53dafe | 1659 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1660 | if (error) |
1661 | goto error; | |
bf264145 | 1662 | txq = real_tx; |
1d24eb48 TH |
1663 | |
1664 | return 0; | |
1665 | ||
1666 | error: | |
6b53dafe WC |
1667 | netdev_queue_update_kobjects(dev, txq, 0); |
1668 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
895a5e96 Y |
1669 | #ifdef CONFIG_SYSFS |
1670 | kset_unregister(dev->queues_kset); | |
1671 | #endif | |
1d24eb48 | 1672 | return error; |
62fe0b40 | 1673 | } |
0a9627f2 | 1674 | |
d755407d CB |
1675 | static int queue_change_owner(struct net_device *ndev, kuid_t kuid, kgid_t kgid) |
1676 | { | |
1677 | int error = 0, real_rx = 0, real_tx = 0; | |
1678 | ||
1679 | #ifdef CONFIG_SYSFS | |
1680 | if (ndev->queues_kset) { | |
1681 | error = sysfs_change_owner(&ndev->queues_kset->kobj, kuid, kgid); | |
1682 | if (error) | |
1683 | return error; | |
1684 | } | |
1685 | real_rx = ndev->real_num_rx_queues; | |
1686 | #endif | |
1687 | real_tx = ndev->real_num_tx_queues; | |
1688 | ||
1689 | error = net_rx_queue_change_owner(ndev, real_rx, kuid, kgid); | |
1690 | if (error) | |
1691 | return error; | |
1692 | ||
1693 | error = net_tx_queue_change_owner(ndev, real_tx, kuid, kgid); | |
1694 | if (error) | |
1695 | return error; | |
1696 | ||
1697 | return 0; | |
1698 | } | |
1699 | ||
6b53dafe | 1700 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1701 | { |
bf264145 TH |
1702 | int real_rx = 0, real_tx = 0; |
1703 | ||
a953be53 | 1704 | #ifdef CONFIG_SYSFS |
6b53dafe | 1705 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1706 | #endif |
6b53dafe | 1707 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1708 | |
6b53dafe WC |
1709 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1710 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
ccf5ff69 | 1711 | #ifdef CONFIG_SYSFS |
6b53dafe | 1712 | kset_unregister(dev->queues_kset); |
bf264145 | 1713 | #endif |
0a9627f2 | 1714 | } |
608b4b95 | 1715 | |
7dc5dbc8 EB |
1716 | static bool net_current_may_mount(void) |
1717 | { | |
1718 | struct net *net = current->nsproxy->net_ns; | |
1719 | ||
1720 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1721 | } | |
1722 | ||
a685e089 | 1723 | static void *net_grab_current_ns(void) |
608b4b95 | 1724 | { |
a685e089 AV |
1725 | struct net *ns = current->nsproxy->net_ns; |
1726 | #ifdef CONFIG_NET_NS | |
1727 | if (ns) | |
c122e14d | 1728 | refcount_inc(&ns->passive); |
a685e089 AV |
1729 | #endif |
1730 | return ns; | |
608b4b95 EB |
1731 | } |
1732 | ||
1733 | static const void *net_initial_ns(void) | |
1734 | { | |
1735 | return &init_net; | |
1736 | } | |
1737 | ||
1738 | static const void *net_netlink_ns(struct sock *sk) | |
1739 | { | |
1740 | return sock_net(sk); | |
1741 | } | |
1742 | ||
737aec57 | 1743 | const struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1744 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1745 | .current_may_mount = net_current_may_mount, |
a685e089 | 1746 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1747 | .netlink_ns = net_netlink_ns, |
1748 | .initial_ns = net_initial_ns, | |
a685e089 | 1749 | .drop_ns = net_drop_ns, |
608b4b95 | 1750 | }; |
04600794 | 1751 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1752 | |
7eff2e7a | 1753 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1754 | { |
43cb76d9 | 1755 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1756 | int retval; |
1da177e4 | 1757 | |
312c004d | 1758 | /* pass interface to uevent. */ |
7eff2e7a | 1759 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1760 | if (retval) |
1761 | goto exit; | |
ca2f37db JT |
1762 | |
1763 | /* pass ifindex to uevent. | |
1764 | * ifindex is useful as it won't change (interface name may change) | |
6648c65e | 1765 | * and is what RtNetlink uses natively. |
1766 | */ | |
7eff2e7a | 1767 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1768 | |
bf62456e | 1769 | exit: |
bf62456e | 1770 | return retval; |
1da177e4 | 1771 | } |
1da177e4 LT |
1772 | |
1773 | /* | |
4ec93edb | 1774 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1775 | * Called when last reference to device kobject is gone. |
1da177e4 | 1776 | */ |
43cb76d9 | 1777 | static void netdev_release(struct device *d) |
1da177e4 | 1778 | { |
43cb76d9 | 1779 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1780 | |
1781 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1782 | ||
6c557001 FW |
1783 | /* no need to wait for rcu grace period: |
1784 | * device is dead and about to be freed. | |
1785 | */ | |
1786 | kfree(rcu_access_pointer(dev->ifalias)); | |
74d332c1 | 1787 | netdev_freemem(dev); |
1da177e4 LT |
1788 | } |
1789 | ||
608b4b95 EB |
1790 | static const void *net_namespace(struct device *d) |
1791 | { | |
5c29482d GT |
1792 | struct net_device *dev = to_net_dev(d); |
1793 | ||
608b4b95 EB |
1794 | return dev_net(dev); |
1795 | } | |
1796 | ||
b0e37c0d DT |
1797 | static void net_get_ownership(struct device *d, kuid_t *uid, kgid_t *gid) |
1798 | { | |
1799 | struct net_device *dev = to_net_dev(d); | |
1800 | const struct net *net = dev_net(dev); | |
1801 | ||
1802 | net_ns_get_ownership(net, uid, gid); | |
1803 | } | |
1804 | ||
e6d473e6 | 1805 | static struct class net_class __ro_after_init = { |
1da177e4 | 1806 | .name = "net", |
43cb76d9 | 1807 | .dev_release = netdev_release, |
6be8aeef | 1808 | .dev_groups = net_class_groups, |
43cb76d9 | 1809 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1810 | .ns_type = &net_ns_type_operations, |
1811 | .namespace = net_namespace, | |
b0e37c0d | 1812 | .get_ownership = net_get_ownership, |
1da177e4 LT |
1813 | }; |
1814 | ||
aa836df9 FF |
1815 | #ifdef CONFIG_OF_NET |
1816 | static int of_dev_node_match(struct device *dev, const void *data) | |
1817 | { | |
2e186a2c TW |
1818 | for (; dev; dev = dev->parent) { |
1819 | if (dev->of_node == data) | |
1820 | return 1; | |
1821 | } | |
aa836df9 | 1822 | |
2e186a2c | 1823 | return 0; |
aa836df9 FF |
1824 | } |
1825 | ||
9861f720 RK |
1826 | /* |
1827 | * of_find_net_device_by_node - lookup the net device for the device node | |
1828 | * @np: OF device node | |
1829 | * | |
1830 | * Looks up the net_device structure corresponding with the device node. | |
1831 | * If successful, returns a pointer to the net_device with the embedded | |
1832 | * struct device refcount incremented by one, or NULL on failure. The | |
1833 | * refcount must be dropped when done with the net_device. | |
1834 | */ | |
aa836df9 FF |
1835 | struct net_device *of_find_net_device_by_node(struct device_node *np) |
1836 | { | |
1837 | struct device *dev; | |
1838 | ||
1839 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1840 | if (!dev) | |
1841 | return NULL; | |
1842 | ||
1843 | return to_net_dev(dev); | |
1844 | } | |
1845 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1846 | #endif | |
1847 | ||
9093bbb2 SH |
1848 | /* Delete sysfs entries but hold kobject reference until after all |
1849 | * netdev references are gone. | |
1850 | */ | |
6b53dafe | 1851 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1852 | { |
6648c65e | 1853 | struct device *dev = &ndev->dev; |
9093bbb2 | 1854 | |
273c28bc | 1855 | if (!refcount_read(&dev_net(ndev)->count)) |
002d8a1a AV |
1856 | dev_set_uevent_suppress(dev, 1); |
1857 | ||
9093bbb2 | 1858 | kobject_get(&dev->kobj); |
3891845e | 1859 | |
6b53dafe | 1860 | remove_queue_kobjects(ndev); |
0a9627f2 | 1861 | |
9802c8e2 ML |
1862 | pm_runtime_set_memalloc_noio(dev, false); |
1863 | ||
9093bbb2 | 1864 | device_del(dev); |
1da177e4 LT |
1865 | } |
1866 | ||
1867 | /* Create sysfs entries for network device. */ | |
6b53dafe | 1868 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 1869 | { |
6648c65e | 1870 | struct device *dev = &ndev->dev; |
6b53dafe | 1871 | const struct attribute_group **groups = ndev->sysfs_groups; |
0a9627f2 | 1872 | int error = 0; |
1da177e4 | 1873 | |
a1b3f594 | 1874 | device_initialize(dev); |
43cb76d9 | 1875 | dev->class = &net_class; |
6b53dafe | 1876 | dev->platform_data = ndev; |
43cb76d9 | 1877 | dev->groups = groups; |
1da177e4 | 1878 | |
6b53dafe | 1879 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 1880 | |
8b41d188 | 1881 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1882 | /* Allow for a device specific group */ |
1883 | if (*groups) | |
1884 | groups++; | |
1da177e4 | 1885 | |
0c509a6c | 1886 | *groups++ = &netstat_group; |
38c1a01c JB |
1887 | |
1888 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
6b53dafe | 1889 | if (ndev->ieee80211_ptr) |
38c1a01c JB |
1890 | *groups++ = &wireless_group; |
1891 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
6b53dafe | 1892 | else if (ndev->wireless_handlers) |
38c1a01c JB |
1893 | *groups++ = &wireless_group; |
1894 | #endif | |
1895 | #endif | |
8b41d188 | 1896 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1897 | |
0a9627f2 TH |
1898 | error = device_add(dev); |
1899 | if (error) | |
8ed633b9 | 1900 | return error; |
0a9627f2 | 1901 | |
6b53dafe | 1902 | error = register_queue_kobjects(ndev); |
8ed633b9 WH |
1903 | if (error) { |
1904 | device_del(dev); | |
1905 | return error; | |
1906 | } | |
0a9627f2 | 1907 | |
9802c8e2 ML |
1908 | pm_runtime_set_memalloc_noio(dev, true); |
1909 | ||
0a9627f2 | 1910 | return error; |
1da177e4 LT |
1911 | } |
1912 | ||
e6dee9f3 CB |
1913 | /* Change owner for sysfs entries when moving network devices across network |
1914 | * namespaces owned by different user namespaces. | |
1915 | */ | |
1916 | int netdev_change_owner(struct net_device *ndev, const struct net *net_old, | |
1917 | const struct net *net_new) | |
1918 | { | |
1919 | struct device *dev = &ndev->dev; | |
1920 | kuid_t old_uid, new_uid; | |
1921 | kgid_t old_gid, new_gid; | |
1922 | int error; | |
1923 | ||
1924 | net_ns_get_ownership(net_old, &old_uid, &old_gid); | |
1925 | net_ns_get_ownership(net_new, &new_uid, &new_gid); | |
1926 | ||
1927 | /* The network namespace was changed but the owning user namespace is | |
1928 | * identical so there's no need to change the owner of sysfs entries. | |
1929 | */ | |
1930 | if (uid_eq(old_uid, new_uid) && gid_eq(old_gid, new_gid)) | |
1931 | return 0; | |
1932 | ||
1933 | error = device_change_owner(dev, new_uid, new_gid); | |
1934 | if (error) | |
1935 | return error; | |
1936 | ||
d755407d CB |
1937 | error = queue_change_owner(ndev, new_uid, new_gid); |
1938 | if (error) | |
1939 | return error; | |
1940 | ||
e6dee9f3 CB |
1941 | return 0; |
1942 | } | |
1943 | ||
b793dc5c | 1944 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1945 | const void *ns) |
b8a9787e | 1946 | { |
58292cbe | 1947 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1948 | } |
58292cbe | 1949 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1950 | |
b793dc5c | 1951 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1952 | const void *ns) |
b8a9787e | 1953 | { |
58292cbe | 1954 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1955 | } |
58292cbe | 1956 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1957 | |
a48d4bb0 | 1958 | int __init netdev_kobject_init(void) |
1da177e4 | 1959 | { |
608b4b95 | 1960 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1961 | return class_register(&net_class); |
1962 | } |