Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * net-sysfs.c - network device class and attributes | |
3 | * | |
4 | * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org> | |
4ec93edb | 5 | * |
1da177e4 LT |
6 | * This program is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
4fc268d2 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/netdevice.h> | |
aecbe01e | 15 | #include <net/switchdev.h> |
1da177e4 | 16 | #include <linux/if_arp.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
174cd4b1 | 18 | #include <linux/sched/signal.h> |
608b4b95 | 19 | #include <linux/nsproxy.h> |
1da177e4 | 20 | #include <net/sock.h> |
608b4b95 | 21 | #include <net/net_namespace.h> |
1da177e4 | 22 | #include <linux/rtnetlink.h> |
fec5e652 | 23 | #include <linux/vmalloc.h> |
bc3b2d7f | 24 | #include <linux/export.h> |
114cf580 | 25 | #include <linux/jiffies.h> |
9802c8e2 | 26 | #include <linux/pm_runtime.h> |
aa836df9 | 27 | #include <linux/of.h> |
88832a22 | 28 | #include <linux/of_net.h> |
4d99f660 | 29 | #include <linux/cpu.h> |
1da177e4 | 30 | |
342709ef PE |
31 | #include "net-sysfs.h" |
32 | ||
8b41d188 | 33 | #ifdef CONFIG_SYSFS |
1da177e4 LT |
34 | static const char fmt_hex[] = "%#x\n"; |
35 | static const char fmt_dec[] = "%d\n"; | |
36 | static const char fmt_ulong[] = "%lu\n"; | |
be1f3c2c | 37 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 38 | |
4ec93edb | 39 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 40 | { |
fe9925b5 | 41 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
42 | } |
43 | ||
44 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
45 | static ssize_t netdev_show(const struct device *dev, |
46 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
47 | ssize_t (*format)(const struct net_device *, char *)) |
48 | { | |
6b53dafe | 49 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
50 | ssize_t ret = -EINVAL; |
51 | ||
52 | read_lock(&dev_base_lock); | |
6b53dafe WC |
53 | if (dev_isalive(ndev)) |
54 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
55 | read_unlock(&dev_base_lock); |
56 | ||
57 | return ret; | |
58 | } | |
59 | ||
60 | /* generate a show function for simple field */ | |
61 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 62 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 63 | { \ |
6b53dafe | 64 | return sprintf(buf, format_string, dev->field); \ |
1da177e4 | 65 | } \ |
6be8aeef | 66 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 67 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 68 | { \ |
43cb76d9 | 69 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
70 | } \ |
71 | ||
72 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
73 | NETDEVICE_SHOW(field, format_string); \ | |
74 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 75 | |
6be8aeef GKH |
76 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
77 | NETDEVICE_SHOW(field, format_string); \ | |
78 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
79 | |
80 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 81 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
82 | const char *buf, size_t len, |
83 | int (*set)(struct net_device *, unsigned long)) | |
84 | { | |
5e1fccc0 EB |
85 | struct net_device *netdev = to_net_dev(dev); |
86 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
87 | unsigned long new; |
88 | int ret = -EINVAL; | |
89 | ||
5e1fccc0 | 90 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
91 | return -EPERM; |
92 | ||
e1e420c7 SK |
93 | ret = kstrtoul(buf, 0, &new); |
94 | if (ret) | |
1da177e4 LT |
95 | goto err; |
96 | ||
5a5990d3 | 97 | if (!rtnl_trylock()) |
336ca57c | 98 | return restart_syscall(); |
5a5990d3 | 99 | |
5e1fccc0 | 100 | if (dev_isalive(netdev)) { |
6648c65e | 101 | ret = (*set)(netdev, new); |
102 | if (ret == 0) | |
1da177e4 LT |
103 | ret = len; |
104 | } | |
105 | rtnl_unlock(); | |
106 | err: | |
107 | return ret; | |
108 | } | |
109 | ||
6be8aeef | 110 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 111 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
112 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
113 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
6be8aeef GKH |
114 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); |
115 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
116 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 | 117 | |
a54acb3a ND |
118 | static ssize_t iflink_show(struct device *dev, struct device_attribute *attr, |
119 | char *buf) | |
120 | { | |
121 | struct net_device *ndev = to_net_dev(dev); | |
122 | ||
123 | return sprintf(buf, fmt_dec, dev_get_iflink(ndev)); | |
124 | } | |
125 | static DEVICE_ATTR_RO(iflink); | |
126 | ||
6b53dafe | 127 | static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) |
685343fc | 128 | { |
6b53dafe | 129 | return sprintf(buf, fmt_dec, dev->name_assign_type); |
685343fc TG |
130 | } |
131 | ||
132 | static ssize_t name_assign_type_show(struct device *dev, | |
133 | struct device_attribute *attr, | |
134 | char *buf) | |
135 | { | |
6b53dafe | 136 | struct net_device *ndev = to_net_dev(dev); |
685343fc TG |
137 | ssize_t ret = -EINVAL; |
138 | ||
6b53dafe | 139 | if (ndev->name_assign_type != NET_NAME_UNKNOWN) |
685343fc TG |
140 | ret = netdev_show(dev, attr, buf, format_name_assign_type); |
141 | ||
142 | return ret; | |
143 | } | |
144 | static DEVICE_ATTR_RO(name_assign_type); | |
145 | ||
1da177e4 | 146 | /* use same locking rules as GIFHWADDR ioctl's */ |
6be8aeef | 147 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 148 | char *buf) |
1da177e4 | 149 | { |
6b53dafe | 150 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
151 | ssize_t ret = -EINVAL; |
152 | ||
153 | read_lock(&dev_base_lock); | |
6b53dafe WC |
154 | if (dev_isalive(ndev)) |
155 | ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); | |
1da177e4 LT |
156 | read_unlock(&dev_base_lock); |
157 | return ret; | |
158 | } | |
6be8aeef | 159 | static DEVICE_ATTR_RO(address); |
1da177e4 | 160 | |
6be8aeef GKH |
161 | static ssize_t broadcast_show(struct device *dev, |
162 | struct device_attribute *attr, char *buf) | |
1da177e4 | 163 | { |
6b53dafe | 164 | struct net_device *ndev = to_net_dev(dev); |
6648c65e | 165 | |
6b53dafe WC |
166 | if (dev_isalive(ndev)) |
167 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
168 | return -EINVAL; |
169 | } | |
6be8aeef | 170 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 171 | |
6b53dafe | 172 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 173 | { |
6b53dafe | 174 | if (!netif_running(dev)) |
fdae0fde | 175 | return -EINVAL; |
6648c65e | 176 | return dev_change_carrier(dev, (bool)new_carrier); |
fdae0fde JP |
177 | } |
178 | ||
6be8aeef GKH |
179 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
180 | const char *buf, size_t len) | |
fdae0fde JP |
181 | { |
182 | return netdev_store(dev, attr, buf, len, change_carrier); | |
183 | } | |
184 | ||
6be8aeef | 185 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 186 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
187 | { |
188 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 189 | |
190 | if (netif_running(netdev)) | |
1da177e4 | 191 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); |
6648c65e | 192 | |
1da177e4 LT |
193 | return -EINVAL; |
194 | } | |
6be8aeef | 195 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 196 | |
6be8aeef | 197 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
198 | struct device_attribute *attr, char *buf) |
199 | { | |
200 | struct net_device *netdev = to_net_dev(dev); | |
201 | int ret = -EINVAL; | |
202 | ||
203 | if (!rtnl_trylock()) | |
204 | return restart_syscall(); | |
205 | ||
8ae6daca | 206 | if (netif_running(netdev)) { |
7cad1bac DD |
207 | struct ethtool_link_ksettings cmd; |
208 | ||
209 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) | |
210 | ret = sprintf(buf, fmt_dec, cmd.base.speed); | |
d519e17e AG |
211 | } |
212 | rtnl_unlock(); | |
213 | return ret; | |
214 | } | |
6be8aeef | 215 | static DEVICE_ATTR_RO(speed); |
d519e17e | 216 | |
6be8aeef | 217 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
218 | struct device_attribute *attr, char *buf) |
219 | { | |
220 | struct net_device *netdev = to_net_dev(dev); | |
221 | int ret = -EINVAL; | |
222 | ||
223 | if (!rtnl_trylock()) | |
224 | return restart_syscall(); | |
225 | ||
8ae6daca | 226 | if (netif_running(netdev)) { |
7cad1bac DD |
227 | struct ethtool_link_ksettings cmd; |
228 | ||
229 | if (!__ethtool_get_link_ksettings(netdev, &cmd)) { | |
c6c13965 | 230 | const char *duplex; |
7cad1bac DD |
231 | |
232 | switch (cmd.base.duplex) { | |
c6c13965 NA |
233 | case DUPLEX_HALF: |
234 | duplex = "half"; | |
235 | break; | |
236 | case DUPLEX_FULL: | |
237 | duplex = "full"; | |
238 | break; | |
239 | default: | |
240 | duplex = "unknown"; | |
241 | break; | |
242 | } | |
243 | ret = sprintf(buf, "%s\n", duplex); | |
244 | } | |
d519e17e AG |
245 | } |
246 | rtnl_unlock(); | |
247 | return ret; | |
248 | } | |
6be8aeef | 249 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 250 | |
6be8aeef | 251 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 252 | struct device_attribute *attr, char *buf) |
b00055aa SR |
253 | { |
254 | struct net_device *netdev = to_net_dev(dev); | |
255 | ||
256 | if (netif_running(netdev)) | |
257 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
258 | ||
259 | return -EINVAL; | |
260 | } | |
6be8aeef | 261 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 262 | |
36cbd3dc | 263 | static const char *const operstates[] = { |
b00055aa SR |
264 | "unknown", |
265 | "notpresent", /* currently unused */ | |
266 | "down", | |
267 | "lowerlayerdown", | |
268 | "testing", /* currently unused */ | |
269 | "dormant", | |
270 | "up" | |
271 | }; | |
272 | ||
6be8aeef | 273 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 274 | struct device_attribute *attr, char *buf) |
b00055aa SR |
275 | { |
276 | const struct net_device *netdev = to_net_dev(dev); | |
277 | unsigned char operstate; | |
278 | ||
279 | read_lock(&dev_base_lock); | |
280 | operstate = netdev->operstate; | |
281 | if (!netif_running(netdev)) | |
282 | operstate = IF_OPER_DOWN; | |
283 | read_unlock(&dev_base_lock); | |
284 | ||
e3a5cd9e | 285 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
286 | return -EINVAL; /* should not happen */ |
287 | ||
288 | return sprintf(buf, "%s\n", operstates[operstate]); | |
289 | } | |
6be8aeef | 290 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 291 | |
2d3b479d | 292 | static ssize_t carrier_changes_show(struct device *dev, |
293 | struct device_attribute *attr, | |
294 | char *buf) | |
295 | { | |
296 | struct net_device *netdev = to_net_dev(dev); | |
6648c65e | 297 | |
2d3b479d | 298 | return sprintf(buf, fmt_dec, |
b2d3bcfa DD |
299 | atomic_read(&netdev->carrier_up_count) + |
300 | atomic_read(&netdev->carrier_down_count)); | |
2d3b479d | 301 | } |
302 | static DEVICE_ATTR_RO(carrier_changes); | |
303 | ||
b2d3bcfa DD |
304 | static ssize_t carrier_up_count_show(struct device *dev, |
305 | struct device_attribute *attr, | |
306 | char *buf) | |
307 | { | |
308 | struct net_device *netdev = to_net_dev(dev); | |
309 | ||
310 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_up_count)); | |
311 | } | |
312 | static DEVICE_ATTR_RO(carrier_up_count); | |
313 | ||
314 | static ssize_t carrier_down_count_show(struct device *dev, | |
315 | struct device_attribute *attr, | |
316 | char *buf) | |
317 | { | |
318 | struct net_device *netdev = to_net_dev(dev); | |
319 | ||
320 | return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_down_count)); | |
321 | } | |
322 | static DEVICE_ATTR_RO(carrier_down_count); | |
323 | ||
1da177e4 | 324 | /* read-write attributes */ |
1da177e4 | 325 | |
6b53dafe | 326 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 327 | { |
6648c65e | 328 | return dev_set_mtu(dev, (int)new_mtu); |
1da177e4 LT |
329 | } |
330 | ||
6be8aeef | 331 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 332 | const char *buf, size_t len) |
1da177e4 | 333 | { |
43cb76d9 | 334 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 335 | } |
6be8aeef | 336 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 337 | |
6b53dafe | 338 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 339 | { |
6648c65e | 340 | return dev_change_flags(dev, (unsigned int)new_flags); |
1da177e4 LT |
341 | } |
342 | ||
6be8aeef | 343 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 344 | const char *buf, size_t len) |
1da177e4 | 345 | { |
43cb76d9 | 346 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 347 | } |
6be8aeef | 348 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 349 | |
6be8aeef | 350 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
351 | struct device_attribute *attr, |
352 | const char *buf, size_t len) | |
1da177e4 | 353 | { |
5e1fccc0 EB |
354 | if (!capable(CAP_NET_ADMIN)) |
355 | return -EPERM; | |
356 | ||
6a643ddb | 357 | return netdev_store(dev, attr, buf, len, dev_change_tx_queue_len); |
1da177e4 | 358 | } |
0cd29503 | 359 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec); |
1da177e4 | 360 | |
3b47d303 ED |
361 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
362 | { | |
363 | dev->gro_flush_timeout = val; | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
6648c65e | 368 | struct device_attribute *attr, |
369 | const char *buf, size_t len) | |
3b47d303 ED |
370 | { |
371 | if (!capable(CAP_NET_ADMIN)) | |
372 | return -EPERM; | |
373 | ||
374 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
375 | } | |
376 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
377 | ||
6be8aeef | 378 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
379 | const char *buf, size_t len) |
380 | { | |
381 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 382 | struct net *net = dev_net(netdev); |
0b815a1a | 383 | size_t count = len; |
c92eb77a | 384 | ssize_t ret = 0; |
0b815a1a | 385 | |
5e1fccc0 | 386 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
387 | return -EPERM; |
388 | ||
389 | /* ignore trailing newline */ | |
390 | if (len > 0 && buf[len - 1] == '\n') | |
391 | --count; | |
392 | ||
c92eb77a RP |
393 | if (!rtnl_trylock()) |
394 | return restart_syscall(); | |
0b815a1a | 395 | |
c92eb77a RP |
396 | if (dev_isalive(netdev)) { |
397 | ret = dev_set_alias(netdev, buf, count); | |
398 | if (ret < 0) | |
399 | goto err; | |
400 | ret = len; | |
401 | netdev_state_change(netdev); | |
402 | } | |
403 | err: | |
404 | rtnl_unlock(); | |
405 | ||
406 | return ret; | |
0b815a1a SH |
407 | } |
408 | ||
6be8aeef | 409 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
410 | struct device_attribute *attr, char *buf) |
411 | { | |
412 | const struct net_device *netdev = to_net_dev(dev); | |
6c557001 | 413 | char tmp[IFALIASZ]; |
0b815a1a SH |
414 | ssize_t ret = 0; |
415 | ||
6c557001 FW |
416 | ret = dev_get_alias(netdev, tmp, sizeof(tmp)); |
417 | if (ret > 0) | |
418 | ret = sprintf(buf, "%s\n", tmp); | |
0b815a1a SH |
419 | return ret; |
420 | } | |
6be8aeef | 421 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 422 | |
6b53dafe | 423 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 424 | { |
6648c65e | 425 | dev_set_group(dev, (int)new_group); |
a512b92b VD |
426 | return 0; |
427 | } | |
428 | ||
6be8aeef GKH |
429 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
430 | const char *buf, size_t len) | |
a512b92b VD |
431 | { |
432 | return netdev_store(dev, attr, buf, len, change_group); | |
433 | } | |
6be8aeef | 434 | NETDEVICE_SHOW(group, fmt_dec); |
d6444062 | 435 | static DEVICE_ATTR(netdev_group, 0644, group_show, group_store); |
6be8aeef | 436 | |
d746d707 AK |
437 | static int change_proto_down(struct net_device *dev, unsigned long proto_down) |
438 | { | |
6648c65e | 439 | return dev_change_proto_down(dev, (bool)proto_down); |
d746d707 AK |
440 | } |
441 | ||
442 | static ssize_t proto_down_store(struct device *dev, | |
443 | struct device_attribute *attr, | |
444 | const char *buf, size_t len) | |
445 | { | |
446 | return netdev_store(dev, attr, buf, len, change_proto_down); | |
447 | } | |
448 | NETDEVICE_SHOW_RW(proto_down, fmt_dec); | |
449 | ||
cc998ff8 | 450 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
451 | struct device_attribute *attr, char *buf) |
452 | { | |
453 | struct net_device *netdev = to_net_dev(dev); | |
454 | ssize_t ret = -EINVAL; | |
455 | ||
456 | if (!rtnl_trylock()) | |
457 | return restart_syscall(); | |
458 | ||
459 | if (dev_isalive(netdev)) { | |
02637fce | 460 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
461 | |
462 | ret = dev_get_phys_port_id(netdev, &ppid); | |
463 | if (!ret) | |
464 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
465 | } | |
466 | rtnl_unlock(); | |
467 | ||
468 | return ret; | |
469 | } | |
cc998ff8 LT |
470 | static DEVICE_ATTR_RO(phys_port_id); |
471 | ||
db24a904 DA |
472 | static ssize_t phys_port_name_show(struct device *dev, |
473 | struct device_attribute *attr, char *buf) | |
474 | { | |
475 | struct net_device *netdev = to_net_dev(dev); | |
476 | ssize_t ret = -EINVAL; | |
477 | ||
478 | if (!rtnl_trylock()) | |
479 | return restart_syscall(); | |
480 | ||
481 | if (dev_isalive(netdev)) { | |
482 | char name[IFNAMSIZ]; | |
483 | ||
484 | ret = dev_get_phys_port_name(netdev, name, sizeof(name)); | |
485 | if (!ret) | |
486 | ret = sprintf(buf, "%s\n", name); | |
487 | } | |
488 | rtnl_unlock(); | |
489 | ||
490 | return ret; | |
491 | } | |
492 | static DEVICE_ATTR_RO(phys_port_name); | |
493 | ||
aecbe01e JP |
494 | static ssize_t phys_switch_id_show(struct device *dev, |
495 | struct device_attribute *attr, char *buf) | |
496 | { | |
497 | struct net_device *netdev = to_net_dev(dev); | |
498 | ssize_t ret = -EINVAL; | |
499 | ||
500 | if (!rtnl_trylock()) | |
501 | return restart_syscall(); | |
502 | ||
503 | if (dev_isalive(netdev)) { | |
f8e20a9f | 504 | struct switchdev_attr attr = { |
6ff64f6f | 505 | .orig_dev = netdev, |
1f868398 | 506 | .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, |
f8e20a9f SF |
507 | .flags = SWITCHDEV_F_NO_RECURSE, |
508 | }; | |
aecbe01e | 509 | |
f8e20a9f | 510 | ret = switchdev_port_attr_get(netdev, &attr); |
aecbe01e | 511 | if (!ret) |
42275bd8 SF |
512 | ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len, |
513 | attr.u.ppid.id); | |
aecbe01e JP |
514 | } |
515 | rtnl_unlock(); | |
516 | ||
517 | return ret; | |
518 | } | |
519 | static DEVICE_ATTR_RO(phys_switch_id); | |
520 | ||
ec6cc599 | 521 | static struct attribute *net_class_attrs[] __ro_after_init = { |
6be8aeef GKH |
522 | &dev_attr_netdev_group.attr, |
523 | &dev_attr_type.attr, | |
524 | &dev_attr_dev_id.attr, | |
3f85944f | 525 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
526 | &dev_attr_iflink.attr, |
527 | &dev_attr_ifindex.attr, | |
685343fc | 528 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
529 | &dev_attr_addr_assign_type.attr, |
530 | &dev_attr_addr_len.attr, | |
531 | &dev_attr_link_mode.attr, | |
532 | &dev_attr_address.attr, | |
533 | &dev_attr_broadcast.attr, | |
534 | &dev_attr_speed.attr, | |
535 | &dev_attr_duplex.attr, | |
536 | &dev_attr_dormant.attr, | |
537 | &dev_attr_operstate.attr, | |
2d3b479d | 538 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
539 | &dev_attr_ifalias.attr, |
540 | &dev_attr_carrier.attr, | |
541 | &dev_attr_mtu.attr, | |
542 | &dev_attr_flags.attr, | |
543 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 544 | &dev_attr_gro_flush_timeout.attr, |
cc998ff8 | 545 | &dev_attr_phys_port_id.attr, |
db24a904 | 546 | &dev_attr_phys_port_name.attr, |
aecbe01e | 547 | &dev_attr_phys_switch_id.attr, |
d746d707 | 548 | &dev_attr_proto_down.attr, |
b2d3bcfa DD |
549 | &dev_attr_carrier_up_count.attr, |
550 | &dev_attr_carrier_down_count.attr, | |
6be8aeef | 551 | NULL, |
1da177e4 | 552 | }; |
6be8aeef | 553 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
554 | |
555 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
556 | static ssize_t netstat_show(const struct device *d, |
557 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
558 | unsigned long offset) |
559 | { | |
43cb76d9 | 560 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
561 | ssize_t ret = -EINVAL; |
562 | ||
be1f3c2c | 563 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
6648c65e | 564 | offset % sizeof(u64) != 0); |
1da177e4 LT |
565 | |
566 | read_lock(&dev_base_lock); | |
96e74088 | 567 | if (dev_isalive(dev)) { |
28172739 ED |
568 | struct rtnl_link_stats64 temp; |
569 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
570 | ||
6648c65e | 571 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *)stats) + offset)); |
96e74088 | 572 | } |
1da177e4 LT |
573 | read_unlock(&dev_base_lock); |
574 | return ret; | |
575 | } | |
576 | ||
577 | /* generate a read-only statistics attribute */ | |
578 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 579 | static ssize_t name##_show(struct device *d, \ |
6648c65e | 580 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 581 | { \ |
43cb76d9 | 582 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 583 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 584 | } \ |
6be8aeef | 585 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
586 | |
587 | NETSTAT_ENTRY(rx_packets); | |
588 | NETSTAT_ENTRY(tx_packets); | |
589 | NETSTAT_ENTRY(rx_bytes); | |
590 | NETSTAT_ENTRY(tx_bytes); | |
591 | NETSTAT_ENTRY(rx_errors); | |
592 | NETSTAT_ENTRY(tx_errors); | |
593 | NETSTAT_ENTRY(rx_dropped); | |
594 | NETSTAT_ENTRY(tx_dropped); | |
595 | NETSTAT_ENTRY(multicast); | |
596 | NETSTAT_ENTRY(collisions); | |
597 | NETSTAT_ENTRY(rx_length_errors); | |
598 | NETSTAT_ENTRY(rx_over_errors); | |
599 | NETSTAT_ENTRY(rx_crc_errors); | |
600 | NETSTAT_ENTRY(rx_frame_errors); | |
601 | NETSTAT_ENTRY(rx_fifo_errors); | |
602 | NETSTAT_ENTRY(rx_missed_errors); | |
603 | NETSTAT_ENTRY(tx_aborted_errors); | |
604 | NETSTAT_ENTRY(tx_carrier_errors); | |
605 | NETSTAT_ENTRY(tx_fifo_errors); | |
606 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
607 | NETSTAT_ENTRY(tx_window_errors); | |
608 | NETSTAT_ENTRY(rx_compressed); | |
609 | NETSTAT_ENTRY(tx_compressed); | |
6e7333d3 | 610 | NETSTAT_ENTRY(rx_nohandler); |
1da177e4 | 611 | |
ec6cc599 | 612 | static struct attribute *netstat_attrs[] __ro_after_init = { |
43cb76d9 GKH |
613 | &dev_attr_rx_packets.attr, |
614 | &dev_attr_tx_packets.attr, | |
615 | &dev_attr_rx_bytes.attr, | |
616 | &dev_attr_tx_bytes.attr, | |
617 | &dev_attr_rx_errors.attr, | |
618 | &dev_attr_tx_errors.attr, | |
619 | &dev_attr_rx_dropped.attr, | |
620 | &dev_attr_tx_dropped.attr, | |
621 | &dev_attr_multicast.attr, | |
622 | &dev_attr_collisions.attr, | |
623 | &dev_attr_rx_length_errors.attr, | |
624 | &dev_attr_rx_over_errors.attr, | |
625 | &dev_attr_rx_crc_errors.attr, | |
626 | &dev_attr_rx_frame_errors.attr, | |
627 | &dev_attr_rx_fifo_errors.attr, | |
628 | &dev_attr_rx_missed_errors.attr, | |
629 | &dev_attr_tx_aborted_errors.attr, | |
630 | &dev_attr_tx_carrier_errors.attr, | |
631 | &dev_attr_tx_fifo_errors.attr, | |
632 | &dev_attr_tx_heartbeat_errors.attr, | |
633 | &dev_attr_tx_window_errors.attr, | |
634 | &dev_attr_rx_compressed.attr, | |
635 | &dev_attr_tx_compressed.attr, | |
6e7333d3 | 636 | &dev_attr_rx_nohandler.attr, |
1da177e4 LT |
637 | NULL |
638 | }; | |
639 | ||
38ef00cc | 640 | static const struct attribute_group netstat_group = { |
1da177e4 LT |
641 | .name = "statistics", |
642 | .attrs = netstat_attrs, | |
643 | }; | |
38c1a01c JB |
644 | |
645 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
646 | static struct attribute *wireless_attrs[] = { | |
647 | NULL | |
648 | }; | |
649 | ||
38ef00cc | 650 | static const struct attribute_group wireless_group = { |
38c1a01c JB |
651 | .name = "wireless", |
652 | .attrs = wireless_attrs, | |
653 | }; | |
654 | #endif | |
6be8aeef GKH |
655 | |
656 | #else /* CONFIG_SYSFS */ | |
657 | #define net_class_groups NULL | |
d6523ddf | 658 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 659 | |
a953be53 | 660 | #ifdef CONFIG_SYSFS |
6648c65e | 661 | #define to_rx_queue_attr(_attr) \ |
662 | container_of(_attr, struct rx_queue_attribute, attr) | |
0a9627f2 TH |
663 | |
664 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
665 | ||
666 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
667 | char *buf) | |
668 | { | |
667e427b | 669 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
670 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
671 | ||
672 | if (!attribute->show) | |
673 | return -EIO; | |
674 | ||
718ad681 | 675 | return attribute->show(queue, buf); |
0a9627f2 TH |
676 | } |
677 | ||
678 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
679 | const char *buf, size_t count) | |
680 | { | |
667e427b | 681 | const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); |
0a9627f2 TH |
682 | struct netdev_rx_queue *queue = to_rx_queue(kobj); |
683 | ||
684 | if (!attribute->store) | |
685 | return -EIO; | |
686 | ||
718ad681 | 687 | return attribute->store(queue, buf, count); |
0a9627f2 TH |
688 | } |
689 | ||
fa50d645 | 690 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
691 | .show = rx_queue_attr_show, |
692 | .store = rx_queue_attr_store, | |
693 | }; | |
694 | ||
a953be53 | 695 | #ifdef CONFIG_RPS |
718ad681 | 696 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf) |
0a9627f2 TH |
697 | { |
698 | struct rps_map *map; | |
699 | cpumask_var_t mask; | |
f0906827 | 700 | int i, len; |
0a9627f2 TH |
701 | |
702 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
703 | return -ENOMEM; | |
704 | ||
705 | rcu_read_lock(); | |
706 | map = rcu_dereference(queue->rps_map); | |
707 | if (map) | |
708 | for (i = 0; i < map->len; i++) | |
709 | cpumask_set_cpu(map->cpus[i], mask); | |
710 | ||
f0906827 | 711 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 712 | rcu_read_unlock(); |
0a9627f2 | 713 | free_cpumask_var(mask); |
f0906827 TH |
714 | |
715 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
716 | } |
717 | ||
f5acb907 | 718 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
718ad681 | 719 | const char *buf, size_t len) |
0a9627f2 TH |
720 | { |
721 | struct rps_map *old_map, *map; | |
722 | cpumask_var_t mask; | |
723 | int err, cpu, i; | |
da65ad1f | 724 | static DEFINE_MUTEX(rps_map_mutex); |
0a9627f2 TH |
725 | |
726 | if (!capable(CAP_NET_ADMIN)) | |
727 | return -EPERM; | |
728 | ||
729 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
730 | return -ENOMEM; | |
731 | ||
732 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
733 | if (err) { | |
734 | free_cpumask_var(mask); | |
735 | return err; | |
736 | } | |
737 | ||
95c96174 | 738 | map = kzalloc(max_t(unsigned int, |
6648c65e | 739 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
740 | GFP_KERNEL); | |
0a9627f2 TH |
741 | if (!map) { |
742 | free_cpumask_var(mask); | |
743 | return -ENOMEM; | |
744 | } | |
745 | ||
746 | i = 0; | |
747 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
748 | map->cpus[i++] = cpu; | |
749 | ||
6648c65e | 750 | if (i) { |
0a9627f2 | 751 | map->len = i; |
6648c65e | 752 | } else { |
0a9627f2 TH |
753 | kfree(map); |
754 | map = NULL; | |
755 | } | |
756 | ||
da65ad1f | 757 | mutex_lock(&rps_map_mutex); |
6e3f7faf | 758 | old_map = rcu_dereference_protected(queue->rps_map, |
da65ad1f | 759 | mutex_is_locked(&rps_map_mutex)); |
0a9627f2 | 760 | rcu_assign_pointer(queue->rps_map, map); |
0a9627f2 | 761 | |
adc9300e | 762 | if (map) |
c5905afb | 763 | static_key_slow_inc(&rps_needed); |
10e4ea75 | 764 | if (old_map) |
c5905afb | 765 | static_key_slow_dec(&rps_needed); |
10e4ea75 | 766 | |
da65ad1f | 767 | mutex_unlock(&rps_map_mutex); |
10e4ea75 TH |
768 | |
769 | if (old_map) | |
770 | kfree_rcu(old_map, rcu); | |
771 | ||
0a9627f2 TH |
772 | free_cpumask_var(mask); |
773 | return len; | |
774 | } | |
775 | ||
fec5e652 | 776 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
777 | char *buf) |
778 | { | |
779 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 780 | unsigned long val = 0; |
fec5e652 TH |
781 | |
782 | rcu_read_lock(); | |
783 | flow_table = rcu_dereference(queue->rps_flow_table); | |
784 | if (flow_table) | |
60b778ce | 785 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
786 | rcu_read_unlock(); |
787 | ||
60b778ce | 788 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
789 | } |
790 | ||
fec5e652 TH |
791 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
792 | { | |
793 | struct rps_dev_flow_table *table = container_of(rcu, | |
794 | struct rps_dev_flow_table, rcu); | |
243198d0 | 795 | vfree(table); |
fec5e652 TH |
796 | } |
797 | ||
f5acb907 | 798 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
718ad681 | 799 | const char *buf, size_t len) |
fec5e652 | 800 | { |
60b778ce | 801 | unsigned long mask, count; |
fec5e652 TH |
802 | struct rps_dev_flow_table *table, *old_table; |
803 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 804 | int rc; |
fec5e652 TH |
805 | |
806 | if (!capable(CAP_NET_ADMIN)) | |
807 | return -EPERM; | |
808 | ||
60b778ce ED |
809 | rc = kstrtoul(buf, 0, &count); |
810 | if (rc < 0) | |
811 | return rc; | |
fec5e652 TH |
812 | |
813 | if (count) { | |
60b778ce ED |
814 | mask = count - 1; |
815 | /* mask = roundup_pow_of_two(count) - 1; | |
816 | * without overflows... | |
817 | */ | |
818 | while ((mask | (mask >> 1)) != mask) | |
819 | mask |= (mask >> 1); | |
820 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 821 | * and on 32bit arches, must check |
822 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
823 | */ |
824 | #if BITS_PER_LONG > 32 | |
825 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 826 | return -EINVAL; |
60b778ce ED |
827 | #else |
828 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 829 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
830 | /* Enforce a limit to prevent overflow */ |
831 | return -EINVAL; | |
832 | } | |
60b778ce ED |
833 | #endif |
834 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
835 | if (!table) |
836 | return -ENOMEM; | |
837 | ||
60b778ce ED |
838 | table->mask = mask; |
839 | for (count = 0; count <= mask; count++) | |
840 | table->flows[count].cpu = RPS_NO_CPU; | |
6648c65e | 841 | } else { |
fec5e652 | 842 | table = NULL; |
6648c65e | 843 | } |
fec5e652 TH |
844 | |
845 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
846 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
847 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
848 | rcu_assign_pointer(queue->rps_flow_table, table); |
849 | spin_unlock(&rps_dev_flow_lock); | |
850 | ||
851 | if (old_table) | |
852 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
853 | ||
854 | return len; | |
855 | } | |
856 | ||
667e427b | 857 | static struct rx_queue_attribute rps_cpus_attribute __ro_after_init |
d6444062 | 858 | = __ATTR(rps_cpus, 0644, show_rps_map, store_rps_map); |
0a9627f2 | 859 | |
667e427b | 860 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute __ro_after_init |
d6444062 | 861 | = __ATTR(rps_flow_cnt, 0644, |
667e427b | 862 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); |
a953be53 | 863 | #endif /* CONFIG_RPS */ |
fec5e652 | 864 | |
667e427b | 865 | static struct attribute *rx_queue_default_attrs[] __ro_after_init = { |
a953be53 | 866 | #ifdef CONFIG_RPS |
0a9627f2 | 867 | &rps_cpus_attribute.attr, |
fec5e652 | 868 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 869 | #endif |
0a9627f2 TH |
870 | NULL |
871 | }; | |
872 | ||
873 | static void rx_queue_release(struct kobject *kobj) | |
874 | { | |
875 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 876 | #ifdef CONFIG_RPS |
6e3f7faf ED |
877 | struct rps_map *map; |
878 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 879 | |
33d480ce | 880 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
881 | if (map) { |
882 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 883 | kfree_rcu(map, rcu); |
9ea19481 | 884 | } |
6e3f7faf | 885 | |
33d480ce | 886 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
887 | if (flow_table) { |
888 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 889 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 890 | } |
a953be53 | 891 | #endif |
0a9627f2 | 892 | |
9ea19481 | 893 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 894 | dev_put(queue->dev); |
0a9627f2 TH |
895 | } |
896 | ||
82ef3d5d WC |
897 | static const void *rx_queue_namespace(struct kobject *kobj) |
898 | { | |
899 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
900 | struct device *dev = &queue->dev->dev; | |
901 | const void *ns = NULL; | |
902 | ||
903 | if (dev->class && dev->class->ns_type) | |
904 | ns = dev->class->namespace(dev); | |
905 | ||
906 | return ns; | |
907 | } | |
908 | ||
b0e37c0d DT |
909 | static void rx_queue_get_ownership(struct kobject *kobj, |
910 | kuid_t *uid, kgid_t *gid) | |
911 | { | |
912 | const struct net *net = rx_queue_namespace(kobj); | |
913 | ||
914 | net_ns_get_ownership(net, uid, gid); | |
915 | } | |
916 | ||
667e427b | 917 | static struct kobj_type rx_queue_ktype __ro_after_init = { |
0a9627f2 TH |
918 | .sysfs_ops = &rx_queue_sysfs_ops, |
919 | .release = rx_queue_release, | |
920 | .default_attrs = rx_queue_default_attrs, | |
b0e37c0d DT |
921 | .namespace = rx_queue_namespace, |
922 | .get_ownership = rx_queue_get_ownership, | |
0a9627f2 TH |
923 | }; |
924 | ||
6b53dafe | 925 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 926 | { |
6b53dafe | 927 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
928 | struct kobject *kobj = &queue->kobj; |
929 | int error = 0; | |
930 | ||
6b53dafe | 931 | kobj->kset = dev->queues_kset; |
0a9627f2 | 932 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
6648c65e | 933 | "rx-%u", index); |
a953be53 | 934 | if (error) |
d0d66837 | 935 | return error; |
a953be53 | 936 | |
6b53dafe WC |
937 | if (dev->sysfs_rx_queue_group) { |
938 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
d0d66837 | 939 | if (error) { |
940 | kobject_put(kobj); | |
941 | return error; | |
942 | } | |
0a9627f2 TH |
943 | } |
944 | ||
945 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 946 | dev_hold(queue->dev); |
0a9627f2 TH |
947 | |
948 | return error; | |
949 | } | |
80dd6eac | 950 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 951 | |
62fe0b40 | 952 | int |
6b53dafe | 953 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 954 | { |
a953be53 | 955 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
956 | int i; |
957 | int error = 0; | |
958 | ||
a953be53 | 959 | #ifndef CONFIG_RPS |
6b53dafe | 960 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
961 | return 0; |
962 | #endif | |
62fe0b40 | 963 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 964 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
965 | if (error) { |
966 | new_num = old_num; | |
0a9627f2 | 967 | break; |
62fe0b40 | 968 | } |
0a9627f2 TH |
969 | } |
970 | ||
a953be53 | 971 | while (--i >= new_num) { |
002d8a1a AV |
972 | struct kobject *kobj = &dev->_rx[i].kobj; |
973 | ||
273c28bc | 974 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 975 | kobj->uevent_suppress = 1; |
6b53dafe | 976 | if (dev->sysfs_rx_queue_group) |
002d8a1a AV |
977 | sysfs_remove_group(kobj, dev->sysfs_rx_queue_group); |
978 | kobject_put(kobj); | |
a953be53 | 979 | } |
0a9627f2 TH |
980 | |
981 | return error; | |
bf264145 TH |
982 | #else |
983 | return 0; | |
984 | #endif | |
0a9627f2 TH |
985 | } |
986 | ||
ccf5ff69 | 987 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
988 | /* |
989 | * netdev_queue sysfs structures and functions. | |
990 | */ | |
991 | struct netdev_queue_attribute { | |
992 | struct attribute attr; | |
718ad681 | 993 | ssize_t (*show)(struct netdev_queue *queue, char *buf); |
1d24eb48 | 994 | ssize_t (*store)(struct netdev_queue *queue, |
718ad681 | 995 | const char *buf, size_t len); |
1d24eb48 | 996 | }; |
6648c65e | 997 | #define to_netdev_queue_attr(_attr) \ |
998 | container_of(_attr, struct netdev_queue_attribute, attr) | |
1d24eb48 TH |
999 | |
1000 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
1001 | ||
1002 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
1003 | struct attribute *attr, char *buf) | |
1004 | { | |
667e427b | 1005 | const struct netdev_queue_attribute *attribute |
1006 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1007 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1008 | ||
1009 | if (!attribute->show) | |
1010 | return -EIO; | |
1011 | ||
718ad681 | 1012 | return attribute->show(queue, buf); |
1d24eb48 TH |
1013 | } |
1014 | ||
1015 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
1016 | struct attribute *attr, | |
1017 | const char *buf, size_t count) | |
1018 | { | |
667e427b | 1019 | const struct netdev_queue_attribute *attribute |
1020 | = to_netdev_queue_attr(attr); | |
1d24eb48 TH |
1021 | struct netdev_queue *queue = to_netdev_queue(kobj); |
1022 | ||
1023 | if (!attribute->store) | |
1024 | return -EIO; | |
1025 | ||
718ad681 | 1026 | return attribute->store(queue, buf, count); |
1d24eb48 TH |
1027 | } |
1028 | ||
1029 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
1030 | .show = netdev_queue_attr_show, | |
1031 | .store = netdev_queue_attr_store, | |
1032 | }; | |
1033 | ||
2b9c7581 | 1034 | static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf) |
ccf5ff69 | 1035 | { |
1036 | unsigned long trans_timeout; | |
1037 | ||
1038 | spin_lock_irq(&queue->_xmit_lock); | |
1039 | trans_timeout = queue->trans_timeout; | |
1040 | spin_unlock_irq(&queue->_xmit_lock); | |
1041 | ||
1042 | return sprintf(buf, "%lu", trans_timeout); | |
1043 | } | |
1044 | ||
c4047f53 | 1045 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
822b3b2e JF |
1046 | { |
1047 | struct net_device *dev = queue->dev; | |
c4047f53 | 1048 | unsigned int i; |
822b3b2e | 1049 | |
c4047f53 | 1050 | i = queue - dev->_tx; |
822b3b2e JF |
1051 | BUG_ON(i >= dev->num_tx_queues); |
1052 | ||
1053 | return i; | |
1054 | } | |
1055 | ||
2b9c7581 | 1056 | static ssize_t traffic_class_show(struct netdev_queue *queue, |
8d059b0f AD |
1057 | char *buf) |
1058 | { | |
1059 | struct net_device *dev = queue->dev; | |
d7be9775 AD |
1060 | int index; |
1061 | int tc; | |
8d059b0f | 1062 | |
d7be9775 AD |
1063 | if (!netif_is_multiqueue(dev)) |
1064 | return -ENOENT; | |
1065 | ||
1066 | index = get_netdev_queue_index(queue); | |
ffcfe25b AD |
1067 | |
1068 | /* If queue belongs to subordinate dev use its TC mapping */ | |
1069 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1070 | ||
d7be9775 | 1071 | tc = netdev_txq_to_tc(dev, index); |
8d059b0f AD |
1072 | if (tc < 0) |
1073 | return -EINVAL; | |
1074 | ||
ffcfe25b AD |
1075 | /* We can report the traffic class one of two ways: |
1076 | * Subordinate device traffic classes are reported with the traffic | |
1077 | * class first, and then the subordinate class so for example TC0 on | |
1078 | * subordinate device 2 will be reported as "0-2". If the queue | |
1079 | * belongs to the root device it will be reported with just the | |
1080 | * traffic class, so just "0" for TC 0 for example. | |
1081 | */ | |
1082 | return dev->num_tc < 0 ? sprintf(buf, "%u%d\n", tc, dev->num_tc) : | |
1083 | sprintf(buf, "%u\n", tc); | |
8d059b0f AD |
1084 | } |
1085 | ||
1086 | #ifdef CONFIG_XPS | |
2b9c7581 | 1087 | static ssize_t tx_maxrate_show(struct netdev_queue *queue, |
822b3b2e JF |
1088 | char *buf) |
1089 | { | |
1090 | return sprintf(buf, "%lu\n", queue->tx_maxrate); | |
1091 | } | |
1092 | ||
2b9c7581 | 1093 | static ssize_t tx_maxrate_store(struct netdev_queue *queue, |
1094 | const char *buf, size_t len) | |
822b3b2e JF |
1095 | { |
1096 | struct net_device *dev = queue->dev; | |
1097 | int err, index = get_netdev_queue_index(queue); | |
1098 | u32 rate = 0; | |
1099 | ||
3033fced TH |
1100 | if (!capable(CAP_NET_ADMIN)) |
1101 | return -EPERM; | |
1102 | ||
822b3b2e JF |
1103 | err = kstrtou32(buf, 10, &rate); |
1104 | if (err < 0) | |
1105 | return err; | |
1106 | ||
1107 | if (!rtnl_trylock()) | |
1108 | return restart_syscall(); | |
1109 | ||
1110 | err = -EOPNOTSUPP; | |
1111 | if (dev->netdev_ops->ndo_set_tx_maxrate) | |
1112 | err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate); | |
1113 | ||
1114 | rtnl_unlock(); | |
1115 | if (!err) { | |
1116 | queue->tx_maxrate = rate; | |
1117 | return len; | |
1118 | } | |
1119 | return err; | |
1120 | } | |
1121 | ||
2b9c7581 | 1122 | static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init |
1123 | = __ATTR_RW(tx_maxrate); | |
822b3b2e JF |
1124 | #endif |
1125 | ||
2b9c7581 | 1126 | static struct netdev_queue_attribute queue_trans_timeout __ro_after_init |
1127 | = __ATTR_RO(tx_timeout); | |
ccf5ff69 | 1128 | |
2b9c7581 | 1129 | static struct netdev_queue_attribute queue_traffic_class __ro_after_init |
1130 | = __ATTR_RO(traffic_class); | |
8d059b0f | 1131 | |
114cf580 TH |
1132 | #ifdef CONFIG_BQL |
1133 | /* | |
1134 | * Byte queue limits sysfs structures and functions. | |
1135 | */ | |
1136 | static ssize_t bql_show(char *buf, unsigned int value) | |
1137 | { | |
1138 | return sprintf(buf, "%u\n", value); | |
1139 | } | |
1140 | ||
1141 | static ssize_t bql_set(const char *buf, const size_t count, | |
1142 | unsigned int *pvalue) | |
1143 | { | |
1144 | unsigned int value; | |
1145 | int err; | |
1146 | ||
6648c65e | 1147 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) { |
114cf580 | 1148 | value = DQL_MAX_LIMIT; |
6648c65e | 1149 | } else { |
114cf580 TH |
1150 | err = kstrtouint(buf, 10, &value); |
1151 | if (err < 0) | |
1152 | return err; | |
1153 | if (value > DQL_MAX_LIMIT) | |
1154 | return -EINVAL; | |
1155 | } | |
1156 | ||
1157 | *pvalue = value; | |
1158 | ||
1159 | return count; | |
1160 | } | |
1161 | ||
1162 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1163 | char *buf) |
1164 | { | |
1165 | struct dql *dql = &queue->dql; | |
1166 | ||
1167 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
1168 | } | |
1169 | ||
1170 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
114cf580 TH |
1171 | const char *buf, size_t len) |
1172 | { | |
1173 | struct dql *dql = &queue->dql; | |
95c96174 | 1174 | unsigned int value; |
114cf580 TH |
1175 | int err; |
1176 | ||
1177 | err = kstrtouint(buf, 10, &value); | |
1178 | if (err < 0) | |
1179 | return err; | |
1180 | ||
1181 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1182 | ||
1183 | return len; | |
1184 | } | |
1185 | ||
170c658a | 1186 | static struct netdev_queue_attribute bql_hold_time_attribute __ro_after_init |
d6444062 | 1187 | = __ATTR(hold_time, 0644, |
170c658a | 1188 | bql_show_hold_time, bql_set_hold_time); |
114cf580 TH |
1189 | |
1190 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
114cf580 TH |
1191 | char *buf) |
1192 | { | |
1193 | struct dql *dql = &queue->dql; | |
1194 | ||
1195 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
1196 | } | |
1197 | ||
170c658a | 1198 | static struct netdev_queue_attribute bql_inflight_attribute __ro_after_init = |
d6444062 | 1199 | __ATTR(inflight, 0444, bql_show_inflight, NULL); |
114cf580 TH |
1200 | |
1201 | #define BQL_ATTR(NAME, FIELD) \ | |
1202 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1203 | char *buf) \ |
1204 | { \ | |
1205 | return bql_show(buf, queue->dql.FIELD); \ | |
1206 | } \ | |
1207 | \ | |
1208 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
114cf580 TH |
1209 | const char *buf, size_t len) \ |
1210 | { \ | |
1211 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1212 | } \ | |
1213 | \ | |
170c658a | 1214 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute __ro_after_init \ |
d6444062 | 1215 | = __ATTR(NAME, 0644, \ |
170c658a | 1216 | bql_show_ ## NAME, bql_set_ ## NAME) |
114cf580 | 1217 | |
170c658a | 1218 | BQL_ATTR(limit, limit); |
1219 | BQL_ATTR(limit_max, max_limit); | |
1220 | BQL_ATTR(limit_min, min_limit); | |
114cf580 | 1221 | |
170c658a | 1222 | static struct attribute *dql_attrs[] __ro_after_init = { |
114cf580 TH |
1223 | &bql_limit_attribute.attr, |
1224 | &bql_limit_max_attribute.attr, | |
1225 | &bql_limit_min_attribute.attr, | |
1226 | &bql_hold_time_attribute.attr, | |
1227 | &bql_inflight_attribute.attr, | |
1228 | NULL | |
1229 | }; | |
1230 | ||
38ef00cc | 1231 | static const struct attribute_group dql_group = { |
114cf580 TH |
1232 | .name = "byte_queue_limits", |
1233 | .attrs = dql_attrs, | |
1234 | }; | |
1235 | #endif /* CONFIG_BQL */ | |
1236 | ||
ccf5ff69 | 1237 | #ifdef CONFIG_XPS |
2b9c7581 | 1238 | static ssize_t xps_cpus_show(struct netdev_queue *queue, |
1239 | char *buf) | |
1d24eb48 TH |
1240 | { |
1241 | struct net_device *dev = queue->dev; | |
184c449f | 1242 | int cpu, len, num_tc = 1, tc = 0; |
1d24eb48 TH |
1243 | struct xps_dev_maps *dev_maps; |
1244 | cpumask_var_t mask; | |
1245 | unsigned long index; | |
1d24eb48 | 1246 | |
d7be9775 AD |
1247 | if (!netif_is_multiqueue(dev)) |
1248 | return -ENOENT; | |
1249 | ||
1d24eb48 TH |
1250 | index = get_netdev_queue_index(queue); |
1251 | ||
184c449f | 1252 | if (dev->num_tc) { |
ffcfe25b | 1253 | /* Do not allow XPS on subordinate device directly */ |
184c449f | 1254 | num_tc = dev->num_tc; |
ffcfe25b AD |
1255 | if (num_tc < 0) |
1256 | return -EINVAL; | |
1257 | ||
1258 | /* If queue belongs to subordinate dev use its map */ | |
1259 | dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev; | |
1260 | ||
184c449f AD |
1261 | tc = netdev_txq_to_tc(dev, index); |
1262 | if (tc < 0) | |
1263 | return -EINVAL; | |
1264 | } | |
1265 | ||
664088f8 AD |
1266 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) |
1267 | return -ENOMEM; | |
1268 | ||
1d24eb48 | 1269 | rcu_read_lock(); |
80d19669 | 1270 | dev_maps = rcu_dereference(dev->xps_cpus_map); |
1d24eb48 | 1271 | if (dev_maps) { |
184c449f AD |
1272 | for_each_possible_cpu(cpu) { |
1273 | int i, tci = cpu * num_tc + tc; | |
1274 | struct xps_map *map; | |
1275 | ||
80d19669 | 1276 | map = rcu_dereference(dev_maps->attr_map[tci]); |
184c449f AD |
1277 | if (!map) |
1278 | continue; | |
1279 | ||
1280 | for (i = map->len; i--;) { | |
1281 | if (map->queues[i] == index) { | |
1282 | cpumask_set_cpu(cpu, mask); | |
1283 | break; | |
1d24eb48 TH |
1284 | } |
1285 | } | |
1286 | } | |
1287 | } | |
1288 | rcu_read_unlock(); | |
1289 | ||
f0906827 | 1290 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
1d24eb48 | 1291 | free_cpumask_var(mask); |
f0906827 | 1292 | return len < PAGE_SIZE ? len : -EINVAL; |
1d24eb48 TH |
1293 | } |
1294 | ||
2b9c7581 | 1295 | static ssize_t xps_cpus_store(struct netdev_queue *queue, |
1296 | const char *buf, size_t len) | |
1d24eb48 TH |
1297 | { |
1298 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1299 | unsigned long index; |
537c00de AD |
1300 | cpumask_var_t mask; |
1301 | int err; | |
1d24eb48 | 1302 | |
d7be9775 AD |
1303 | if (!netif_is_multiqueue(dev)) |
1304 | return -ENOENT; | |
1305 | ||
1d24eb48 TH |
1306 | if (!capable(CAP_NET_ADMIN)) |
1307 | return -EPERM; | |
1308 | ||
1309 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1310 | return -ENOMEM; | |
1311 | ||
1312 | index = get_netdev_queue_index(queue); | |
1313 | ||
1314 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1315 | if (err) { | |
1316 | free_cpumask_var(mask); | |
1317 | return err; | |
1318 | } | |
1319 | ||
537c00de | 1320 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1321 | |
1322 | free_cpumask_var(mask); | |
1d24eb48 | 1323 | |
537c00de | 1324 | return err ? : len; |
1d24eb48 TH |
1325 | } |
1326 | ||
2b9c7581 | 1327 | static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init |
1328 | = __ATTR_RW(xps_cpus); | |
8af2c06f AN |
1329 | |
1330 | static ssize_t xps_rxqs_show(struct netdev_queue *queue, char *buf) | |
1331 | { | |
1332 | struct net_device *dev = queue->dev; | |
1333 | struct xps_dev_maps *dev_maps; | |
1334 | unsigned long *mask, index; | |
1335 | int j, len, num_tc = 1, tc = 0; | |
1336 | ||
1337 | index = get_netdev_queue_index(queue); | |
1338 | ||
1339 | if (dev->num_tc) { | |
1340 | num_tc = dev->num_tc; | |
1341 | tc = netdev_txq_to_tc(dev, index); | |
1342 | if (tc < 0) | |
1343 | return -EINVAL; | |
1344 | } | |
1345 | mask = kcalloc(BITS_TO_LONGS(dev->num_rx_queues), sizeof(long), | |
1346 | GFP_KERNEL); | |
1347 | if (!mask) | |
1348 | return -ENOMEM; | |
1349 | ||
1350 | rcu_read_lock(); | |
1351 | dev_maps = rcu_dereference(dev->xps_rxqs_map); | |
1352 | if (!dev_maps) | |
1353 | goto out_no_maps; | |
1354 | ||
1355 | for (j = -1; j = netif_attrmask_next(j, NULL, dev->num_rx_queues), | |
1356 | j < dev->num_rx_queues;) { | |
1357 | int i, tci = j * num_tc + tc; | |
1358 | struct xps_map *map; | |
1359 | ||
1360 | map = rcu_dereference(dev_maps->attr_map[tci]); | |
1361 | if (!map) | |
1362 | continue; | |
1363 | ||
1364 | for (i = map->len; i--;) { | |
1365 | if (map->queues[i] == index) { | |
1366 | set_bit(j, mask); | |
1367 | break; | |
1368 | } | |
1369 | } | |
1370 | } | |
1371 | out_no_maps: | |
1372 | rcu_read_unlock(); | |
1373 | ||
1374 | len = bitmap_print_to_pagebuf(false, buf, mask, dev->num_rx_queues); | |
1375 | kfree(mask); | |
1376 | ||
1377 | return len < PAGE_SIZE ? len : -EINVAL; | |
1378 | } | |
1379 | ||
1380 | static ssize_t xps_rxqs_store(struct netdev_queue *queue, const char *buf, | |
1381 | size_t len) | |
1382 | { | |
1383 | struct net_device *dev = queue->dev; | |
1384 | struct net *net = dev_net(dev); | |
1385 | unsigned long *mask, index; | |
1386 | int err; | |
1387 | ||
1388 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1389 | return -EPERM; | |
1390 | ||
1391 | mask = kcalloc(BITS_TO_LONGS(dev->num_rx_queues), sizeof(long), | |
1392 | GFP_KERNEL); | |
1393 | if (!mask) | |
1394 | return -ENOMEM; | |
1395 | ||
1396 | index = get_netdev_queue_index(queue); | |
1397 | ||
1398 | err = bitmap_parse(buf, len, mask, dev->num_rx_queues); | |
1399 | if (err) { | |
1400 | kfree(mask); | |
1401 | return err; | |
1402 | } | |
1403 | ||
4d99f660 | 1404 | cpus_read_lock(); |
8af2c06f | 1405 | err = __netif_set_xps_queue(dev, mask, index, true); |
4d99f660 AV |
1406 | cpus_read_unlock(); |
1407 | ||
8af2c06f AN |
1408 | kfree(mask); |
1409 | return err ? : len; | |
1410 | } | |
1411 | ||
1412 | static struct netdev_queue_attribute xps_rxqs_attribute __ro_after_init | |
1413 | = __ATTR_RW(xps_rxqs); | |
ccf5ff69 | 1414 | #endif /* CONFIG_XPS */ |
1d24eb48 | 1415 | |
2b9c7581 | 1416 | static struct attribute *netdev_queue_default_attrs[] __ro_after_init = { |
ccf5ff69 | 1417 | &queue_trans_timeout.attr, |
8d059b0f | 1418 | &queue_traffic_class.attr, |
ccf5ff69 | 1419 | #ifdef CONFIG_XPS |
1d24eb48 | 1420 | &xps_cpus_attribute.attr, |
8af2c06f | 1421 | &xps_rxqs_attribute.attr, |
822b3b2e | 1422 | &queue_tx_maxrate.attr, |
ccf5ff69 | 1423 | #endif |
1d24eb48 TH |
1424 | NULL |
1425 | }; | |
1426 | ||
1427 | static void netdev_queue_release(struct kobject *kobj) | |
1428 | { | |
1429 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1430 | |
1d24eb48 TH |
1431 | memset(kobj, 0, sizeof(*kobj)); |
1432 | dev_put(queue->dev); | |
1433 | } | |
1434 | ||
82ef3d5d WC |
1435 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1436 | { | |
1437 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1438 | struct device *dev = &queue->dev->dev; | |
1439 | const void *ns = NULL; | |
1440 | ||
1441 | if (dev->class && dev->class->ns_type) | |
1442 | ns = dev->class->namespace(dev); | |
1443 | ||
1444 | return ns; | |
1445 | } | |
1446 | ||
b0e37c0d DT |
1447 | static void netdev_queue_get_ownership(struct kobject *kobj, |
1448 | kuid_t *uid, kgid_t *gid) | |
1449 | { | |
1450 | const struct net *net = netdev_queue_namespace(kobj); | |
1451 | ||
1452 | net_ns_get_ownership(net, uid, gid); | |
1453 | } | |
1454 | ||
2b9c7581 | 1455 | static struct kobj_type netdev_queue_ktype __ro_after_init = { |
1d24eb48 TH |
1456 | .sysfs_ops = &netdev_queue_sysfs_ops, |
1457 | .release = netdev_queue_release, | |
1458 | .default_attrs = netdev_queue_default_attrs, | |
82ef3d5d | 1459 | .namespace = netdev_queue_namespace, |
b0e37c0d | 1460 | .get_ownership = netdev_queue_get_ownership, |
1d24eb48 TH |
1461 | }; |
1462 | ||
6b53dafe | 1463 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1464 | { |
6b53dafe | 1465 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1466 | struct kobject *kobj = &queue->kobj; |
1467 | int error = 0; | |
1468 | ||
6b53dafe | 1469 | kobj->kset = dev->queues_kset; |
1d24eb48 | 1470 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
6648c65e | 1471 | "tx-%u", index); |
114cf580 | 1472 | if (error) |
d0d66837 | 1473 | return error; |
114cf580 TH |
1474 | |
1475 | #ifdef CONFIG_BQL | |
1476 | error = sysfs_create_group(kobj, &dql_group); | |
d0d66837 | 1477 | if (error) { |
1478 | kobject_put(kobj); | |
1479 | return error; | |
1480 | } | |
114cf580 | 1481 | #endif |
1d24eb48 TH |
1482 | |
1483 | kobject_uevent(kobj, KOBJ_ADD); | |
1484 | dev_hold(queue->dev); | |
1485 | ||
114cf580 | 1486 | return 0; |
1d24eb48 | 1487 | } |
ccf5ff69 | 1488 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1489 | |
1490 | int | |
6b53dafe | 1491 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1492 | { |
ccf5ff69 | 1493 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1494 | int i; |
1495 | int error = 0; | |
1496 | ||
1497 | for (i = old_num; i < new_num; i++) { | |
6b53dafe | 1498 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1499 | if (error) { |
1500 | new_num = old_num; | |
1501 | break; | |
1502 | } | |
1503 | } | |
1504 | ||
114cf580 | 1505 | while (--i >= new_num) { |
6b53dafe | 1506 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 | 1507 | |
273c28bc | 1508 | if (!refcount_read(&dev_net(dev)->count)) |
002d8a1a | 1509 | queue->kobj.uevent_suppress = 1; |
114cf580 TH |
1510 | #ifdef CONFIG_BQL |
1511 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1512 | #endif | |
1513 | kobject_put(&queue->kobj); | |
1514 | } | |
1d24eb48 TH |
1515 | |
1516 | return error; | |
bf264145 TH |
1517 | #else |
1518 | return 0; | |
ccf5ff69 | 1519 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1520 | } |
1521 | ||
6b53dafe | 1522 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1523 | { |
bf264145 | 1524 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1525 | |
ccf5ff69 | 1526 | #ifdef CONFIG_SYSFS |
6b53dafe | 1527 | dev->queues_kset = kset_create_and_add("queues", |
6648c65e | 1528 | NULL, &dev->dev.kobj); |
6b53dafe | 1529 | if (!dev->queues_kset) |
62fe0b40 | 1530 | return -ENOMEM; |
6b53dafe | 1531 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1532 | #endif |
6b53dafe | 1533 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1534 | |
6b53dafe | 1535 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1536 | if (error) |
1537 | goto error; | |
bf264145 | 1538 | rxq = real_rx; |
1d24eb48 | 1539 | |
6b53dafe | 1540 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1541 | if (error) |
1542 | goto error; | |
bf264145 | 1543 | txq = real_tx; |
1d24eb48 TH |
1544 | |
1545 | return 0; | |
1546 | ||
1547 | error: | |
6b53dafe WC |
1548 | netdev_queue_update_kobjects(dev, txq, 0); |
1549 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
1d24eb48 | 1550 | return error; |
62fe0b40 | 1551 | } |
0a9627f2 | 1552 | |
6b53dafe | 1553 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1554 | { |
bf264145 TH |
1555 | int real_rx = 0, real_tx = 0; |
1556 | ||
a953be53 | 1557 | #ifdef CONFIG_SYSFS |
6b53dafe | 1558 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1559 | #endif |
6b53dafe | 1560 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1561 | |
6b53dafe WC |
1562 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1563 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
ccf5ff69 | 1564 | #ifdef CONFIG_SYSFS |
6b53dafe | 1565 | kset_unregister(dev->queues_kset); |
bf264145 | 1566 | #endif |
0a9627f2 | 1567 | } |
608b4b95 | 1568 | |
7dc5dbc8 EB |
1569 | static bool net_current_may_mount(void) |
1570 | { | |
1571 | struct net *net = current->nsproxy->net_ns; | |
1572 | ||
1573 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1574 | } | |
1575 | ||
a685e089 | 1576 | static void *net_grab_current_ns(void) |
608b4b95 | 1577 | { |
a685e089 AV |
1578 | struct net *ns = current->nsproxy->net_ns; |
1579 | #ifdef CONFIG_NET_NS | |
1580 | if (ns) | |
c122e14d | 1581 | refcount_inc(&ns->passive); |
a685e089 AV |
1582 | #endif |
1583 | return ns; | |
608b4b95 EB |
1584 | } |
1585 | ||
1586 | static const void *net_initial_ns(void) | |
1587 | { | |
1588 | return &init_net; | |
1589 | } | |
1590 | ||
1591 | static const void *net_netlink_ns(struct sock *sk) | |
1592 | { | |
1593 | return sock_net(sk); | |
1594 | } | |
1595 | ||
737aec57 | 1596 | const struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1597 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1598 | .current_may_mount = net_current_may_mount, |
a685e089 | 1599 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1600 | .netlink_ns = net_netlink_ns, |
1601 | .initial_ns = net_initial_ns, | |
a685e089 | 1602 | .drop_ns = net_drop_ns, |
608b4b95 | 1603 | }; |
04600794 | 1604 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1605 | |
7eff2e7a | 1606 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1607 | { |
43cb76d9 | 1608 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1609 | int retval; |
1da177e4 | 1610 | |
312c004d | 1611 | /* pass interface to uevent. */ |
7eff2e7a | 1612 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1613 | if (retval) |
1614 | goto exit; | |
ca2f37db JT |
1615 | |
1616 | /* pass ifindex to uevent. | |
1617 | * ifindex is useful as it won't change (interface name may change) | |
6648c65e | 1618 | * and is what RtNetlink uses natively. |
1619 | */ | |
7eff2e7a | 1620 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1621 | |
bf62456e | 1622 | exit: |
bf62456e | 1623 | return retval; |
1da177e4 | 1624 | } |
1da177e4 LT |
1625 | |
1626 | /* | |
4ec93edb | 1627 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1628 | * Called when last reference to device kobject is gone. |
1da177e4 | 1629 | */ |
43cb76d9 | 1630 | static void netdev_release(struct device *d) |
1da177e4 | 1631 | { |
43cb76d9 | 1632 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1633 | |
1634 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1635 | ||
6c557001 FW |
1636 | /* no need to wait for rcu grace period: |
1637 | * device is dead and about to be freed. | |
1638 | */ | |
1639 | kfree(rcu_access_pointer(dev->ifalias)); | |
74d332c1 | 1640 | netdev_freemem(dev); |
1da177e4 LT |
1641 | } |
1642 | ||
608b4b95 EB |
1643 | static const void *net_namespace(struct device *d) |
1644 | { | |
5c29482d GT |
1645 | struct net_device *dev = to_net_dev(d); |
1646 | ||
608b4b95 EB |
1647 | return dev_net(dev); |
1648 | } | |
1649 | ||
b0e37c0d DT |
1650 | static void net_get_ownership(struct device *d, kuid_t *uid, kgid_t *gid) |
1651 | { | |
1652 | struct net_device *dev = to_net_dev(d); | |
1653 | const struct net *net = dev_net(dev); | |
1654 | ||
1655 | net_ns_get_ownership(net, uid, gid); | |
1656 | } | |
1657 | ||
e6d473e6 | 1658 | static struct class net_class __ro_after_init = { |
1da177e4 | 1659 | .name = "net", |
43cb76d9 | 1660 | .dev_release = netdev_release, |
6be8aeef | 1661 | .dev_groups = net_class_groups, |
43cb76d9 | 1662 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1663 | .ns_type = &net_ns_type_operations, |
1664 | .namespace = net_namespace, | |
b0e37c0d | 1665 | .get_ownership = net_get_ownership, |
1da177e4 LT |
1666 | }; |
1667 | ||
aa836df9 FF |
1668 | #ifdef CONFIG_OF_NET |
1669 | static int of_dev_node_match(struct device *dev, const void *data) | |
1670 | { | |
1671 | int ret = 0; | |
1672 | ||
1673 | if (dev->parent) | |
1674 | ret = dev->parent->of_node == data; | |
1675 | ||
1676 | return ret == 0 ? dev->of_node == data : ret; | |
1677 | } | |
1678 | ||
9861f720 RK |
1679 | /* |
1680 | * of_find_net_device_by_node - lookup the net device for the device node | |
1681 | * @np: OF device node | |
1682 | * | |
1683 | * Looks up the net_device structure corresponding with the device node. | |
1684 | * If successful, returns a pointer to the net_device with the embedded | |
1685 | * struct device refcount incremented by one, or NULL on failure. The | |
1686 | * refcount must be dropped when done with the net_device. | |
1687 | */ | |
aa836df9 FF |
1688 | struct net_device *of_find_net_device_by_node(struct device_node *np) |
1689 | { | |
1690 | struct device *dev; | |
1691 | ||
1692 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1693 | if (!dev) | |
1694 | return NULL; | |
1695 | ||
1696 | return to_net_dev(dev); | |
1697 | } | |
1698 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1699 | #endif | |
1700 | ||
9093bbb2 SH |
1701 | /* Delete sysfs entries but hold kobject reference until after all |
1702 | * netdev references are gone. | |
1703 | */ | |
6b53dafe | 1704 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1705 | { |
6648c65e | 1706 | struct device *dev = &ndev->dev; |
9093bbb2 | 1707 | |
273c28bc | 1708 | if (!refcount_read(&dev_net(ndev)->count)) |
002d8a1a AV |
1709 | dev_set_uevent_suppress(dev, 1); |
1710 | ||
9093bbb2 | 1711 | kobject_get(&dev->kobj); |
3891845e | 1712 | |
6b53dafe | 1713 | remove_queue_kobjects(ndev); |
0a9627f2 | 1714 | |
9802c8e2 ML |
1715 | pm_runtime_set_memalloc_noio(dev, false); |
1716 | ||
9093bbb2 | 1717 | device_del(dev); |
1da177e4 LT |
1718 | } |
1719 | ||
1720 | /* Create sysfs entries for network device. */ | |
6b53dafe | 1721 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 1722 | { |
6648c65e | 1723 | struct device *dev = &ndev->dev; |
6b53dafe | 1724 | const struct attribute_group **groups = ndev->sysfs_groups; |
0a9627f2 | 1725 | int error = 0; |
1da177e4 | 1726 | |
a1b3f594 | 1727 | device_initialize(dev); |
43cb76d9 | 1728 | dev->class = &net_class; |
6b53dafe | 1729 | dev->platform_data = ndev; |
43cb76d9 | 1730 | dev->groups = groups; |
1da177e4 | 1731 | |
6b53dafe | 1732 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 1733 | |
8b41d188 | 1734 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1735 | /* Allow for a device specific group */ |
1736 | if (*groups) | |
1737 | groups++; | |
1da177e4 | 1738 | |
0c509a6c | 1739 | *groups++ = &netstat_group; |
38c1a01c JB |
1740 | |
1741 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
6b53dafe | 1742 | if (ndev->ieee80211_ptr) |
38c1a01c JB |
1743 | *groups++ = &wireless_group; |
1744 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
6b53dafe | 1745 | else if (ndev->wireless_handlers) |
38c1a01c JB |
1746 | *groups++ = &wireless_group; |
1747 | #endif | |
1748 | #endif | |
8b41d188 | 1749 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1750 | |
0a9627f2 TH |
1751 | error = device_add(dev); |
1752 | if (error) | |
1753 | return error; | |
1754 | ||
6b53dafe | 1755 | error = register_queue_kobjects(ndev); |
0a9627f2 TH |
1756 | if (error) { |
1757 | device_del(dev); | |
1758 | return error; | |
1759 | } | |
1760 | ||
9802c8e2 ML |
1761 | pm_runtime_set_memalloc_noio(dev, true); |
1762 | ||
0a9627f2 | 1763 | return error; |
1da177e4 LT |
1764 | } |
1765 | ||
b793dc5c | 1766 | int netdev_class_create_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1767 | const void *ns) |
b8a9787e | 1768 | { |
58292cbe | 1769 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1770 | } |
58292cbe | 1771 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1772 | |
b793dc5c | 1773 | void netdev_class_remove_file_ns(const struct class_attribute *class_attr, |
58292cbe | 1774 | const void *ns) |
b8a9787e | 1775 | { |
58292cbe | 1776 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1777 | } |
58292cbe | 1778 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1779 | |
a48d4bb0 | 1780 | int __init netdev_kobject_init(void) |
1da177e4 | 1781 | { |
608b4b95 | 1782 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1783 | return class_register(&net_class); |
1784 | } |