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> |
608b4b95 | 18 | #include <linux/nsproxy.h> |
1da177e4 | 19 | #include <net/sock.h> |
608b4b95 | 20 | #include <net/net_namespace.h> |
1da177e4 | 21 | #include <linux/rtnetlink.h> |
fec5e652 | 22 | #include <linux/vmalloc.h> |
bc3b2d7f | 23 | #include <linux/export.h> |
114cf580 | 24 | #include <linux/jiffies.h> |
9802c8e2 | 25 | #include <linux/pm_runtime.h> |
aa836df9 | 26 | #include <linux/of.h> |
1da177e4 | 27 | |
342709ef PE |
28 | #include "net-sysfs.h" |
29 | ||
8b41d188 | 30 | #ifdef CONFIG_SYSFS |
1da177e4 | 31 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 32 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 | 33 | static const char fmt_dec[] = "%d\n"; |
8ae6daca | 34 | static const char fmt_udec[] = "%u\n"; |
1da177e4 | 35 | static const char fmt_ulong[] = "%lu\n"; |
be1f3c2c | 36 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 37 | |
4ec93edb | 38 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 39 | { |
fe9925b5 | 40 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
41 | } |
42 | ||
43 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
44 | static ssize_t netdev_show(const struct device *dev, |
45 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
46 | ssize_t (*format)(const struct net_device *, char *)) |
47 | { | |
6b53dafe | 48 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
49 | ssize_t ret = -EINVAL; |
50 | ||
51 | read_lock(&dev_base_lock); | |
6b53dafe WC |
52 | if (dev_isalive(ndev)) |
53 | ret = (*format)(ndev, buf); | |
1da177e4 LT |
54 | read_unlock(&dev_base_lock); |
55 | ||
56 | return ret; | |
57 | } | |
58 | ||
59 | /* generate a show function for simple field */ | |
60 | #define NETDEVICE_SHOW(field, format_string) \ | |
6b53dafe | 61 | static ssize_t format_##field(const struct net_device *dev, char *buf) \ |
1da177e4 | 62 | { \ |
6b53dafe | 63 | return sprintf(buf, format_string, dev->field); \ |
1da177e4 | 64 | } \ |
6be8aeef | 65 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 66 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 67 | { \ |
43cb76d9 | 68 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
69 | } \ |
70 | ||
71 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
72 | NETDEVICE_SHOW(field, format_string); \ | |
73 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 74 | |
6be8aeef GKH |
75 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
76 | NETDEVICE_SHOW(field, format_string); \ | |
77 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
78 | |
79 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 80 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
81 | const char *buf, size_t len, |
82 | int (*set)(struct net_device *, unsigned long)) | |
83 | { | |
5e1fccc0 EB |
84 | struct net_device *netdev = to_net_dev(dev); |
85 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
86 | unsigned long new; |
87 | int ret = -EINVAL; | |
88 | ||
5e1fccc0 | 89 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
90 | return -EPERM; |
91 | ||
e1e420c7 SK |
92 | ret = kstrtoul(buf, 0, &new); |
93 | if (ret) | |
1da177e4 LT |
94 | goto err; |
95 | ||
5a5990d3 | 96 | if (!rtnl_trylock()) |
336ca57c | 97 | return restart_syscall(); |
5a5990d3 | 98 | |
5e1fccc0 EB |
99 | if (dev_isalive(netdev)) { |
100 | if ((ret = (*set)(netdev, new)) == 0) | |
1da177e4 LT |
101 | ret = len; |
102 | } | |
103 | rtnl_unlock(); | |
104 | err: | |
105 | return ret; | |
106 | } | |
107 | ||
6be8aeef | 108 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 109 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
110 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
111 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
112 | NETDEVICE_SHOW_RO(iflink, fmt_dec); | |
113 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); | |
114 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
115 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 | 116 | |
6b53dafe | 117 | static ssize_t format_name_assign_type(const struct net_device *dev, char *buf) |
685343fc | 118 | { |
6b53dafe | 119 | return sprintf(buf, fmt_dec, dev->name_assign_type); |
685343fc TG |
120 | } |
121 | ||
122 | static ssize_t name_assign_type_show(struct device *dev, | |
123 | struct device_attribute *attr, | |
124 | char *buf) | |
125 | { | |
6b53dafe | 126 | struct net_device *ndev = to_net_dev(dev); |
685343fc TG |
127 | ssize_t ret = -EINVAL; |
128 | ||
6b53dafe | 129 | if (ndev->name_assign_type != NET_NAME_UNKNOWN) |
685343fc TG |
130 | ret = netdev_show(dev, attr, buf, format_name_assign_type); |
131 | ||
132 | return ret; | |
133 | } | |
134 | static DEVICE_ATTR_RO(name_assign_type); | |
135 | ||
1da177e4 | 136 | /* use same locking rules as GIFHWADDR ioctl's */ |
6be8aeef | 137 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 138 | char *buf) |
1da177e4 | 139 | { |
6b53dafe | 140 | struct net_device *ndev = to_net_dev(dev); |
1da177e4 LT |
141 | ssize_t ret = -EINVAL; |
142 | ||
143 | read_lock(&dev_base_lock); | |
6b53dafe WC |
144 | if (dev_isalive(ndev)) |
145 | ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len); | |
1da177e4 LT |
146 | read_unlock(&dev_base_lock); |
147 | return ret; | |
148 | } | |
6be8aeef | 149 | static DEVICE_ATTR_RO(address); |
1da177e4 | 150 | |
6be8aeef GKH |
151 | static ssize_t broadcast_show(struct device *dev, |
152 | struct device_attribute *attr, char *buf) | |
1da177e4 | 153 | { |
6b53dafe WC |
154 | struct net_device *ndev = to_net_dev(dev); |
155 | if (dev_isalive(ndev)) | |
156 | return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len); | |
1da177e4 LT |
157 | return -EINVAL; |
158 | } | |
6be8aeef | 159 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 160 | |
6b53dafe | 161 | static int change_carrier(struct net_device *dev, unsigned long new_carrier) |
fdae0fde | 162 | { |
6b53dafe | 163 | if (!netif_running(dev)) |
fdae0fde | 164 | return -EINVAL; |
6b53dafe | 165 | return dev_change_carrier(dev, (bool) new_carrier); |
fdae0fde JP |
166 | } |
167 | ||
6be8aeef GKH |
168 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
169 | const char *buf, size_t len) | |
fdae0fde JP |
170 | { |
171 | return netdev_store(dev, attr, buf, len, change_carrier); | |
172 | } | |
173 | ||
6be8aeef | 174 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 175 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
176 | { |
177 | struct net_device *netdev = to_net_dev(dev); | |
178 | if (netif_running(netdev)) { | |
179 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
180 | } | |
181 | return -EINVAL; | |
182 | } | |
6be8aeef | 183 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 184 | |
6be8aeef | 185 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
186 | struct device_attribute *attr, char *buf) |
187 | { | |
188 | struct net_device *netdev = to_net_dev(dev); | |
189 | int ret = -EINVAL; | |
190 | ||
191 | if (!rtnl_trylock()) | |
192 | return restart_syscall(); | |
193 | ||
8ae6daca DD |
194 | if (netif_running(netdev)) { |
195 | struct ethtool_cmd cmd; | |
4bc71cb9 | 196 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca | 197 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); |
d519e17e AG |
198 | } |
199 | rtnl_unlock(); | |
200 | return ret; | |
201 | } | |
6be8aeef | 202 | static DEVICE_ATTR_RO(speed); |
d519e17e | 203 | |
6be8aeef | 204 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
205 | struct device_attribute *attr, char *buf) |
206 | { | |
207 | struct net_device *netdev = to_net_dev(dev); | |
208 | int ret = -EINVAL; | |
209 | ||
210 | if (!rtnl_trylock()) | |
211 | return restart_syscall(); | |
212 | ||
8ae6daca DD |
213 | if (netif_running(netdev)) { |
214 | struct ethtool_cmd cmd; | |
c6c13965 NA |
215 | if (!__ethtool_get_settings(netdev, &cmd)) { |
216 | const char *duplex; | |
217 | switch (cmd.duplex) { | |
218 | case DUPLEX_HALF: | |
219 | duplex = "half"; | |
220 | break; | |
221 | case DUPLEX_FULL: | |
222 | duplex = "full"; | |
223 | break; | |
224 | default: | |
225 | duplex = "unknown"; | |
226 | break; | |
227 | } | |
228 | ret = sprintf(buf, "%s\n", duplex); | |
229 | } | |
d519e17e AG |
230 | } |
231 | rtnl_unlock(); | |
232 | return ret; | |
233 | } | |
6be8aeef | 234 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 235 | |
6be8aeef | 236 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 237 | struct device_attribute *attr, char *buf) |
b00055aa SR |
238 | { |
239 | struct net_device *netdev = to_net_dev(dev); | |
240 | ||
241 | if (netif_running(netdev)) | |
242 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
243 | ||
244 | return -EINVAL; | |
245 | } | |
6be8aeef | 246 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 247 | |
36cbd3dc | 248 | static const char *const operstates[] = { |
b00055aa SR |
249 | "unknown", |
250 | "notpresent", /* currently unused */ | |
251 | "down", | |
252 | "lowerlayerdown", | |
253 | "testing", /* currently unused */ | |
254 | "dormant", | |
255 | "up" | |
256 | }; | |
257 | ||
6be8aeef | 258 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 259 | struct device_attribute *attr, char *buf) |
b00055aa SR |
260 | { |
261 | const struct net_device *netdev = to_net_dev(dev); | |
262 | unsigned char operstate; | |
263 | ||
264 | read_lock(&dev_base_lock); | |
265 | operstate = netdev->operstate; | |
266 | if (!netif_running(netdev)) | |
267 | operstate = IF_OPER_DOWN; | |
268 | read_unlock(&dev_base_lock); | |
269 | ||
e3a5cd9e | 270 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
271 | return -EINVAL; /* should not happen */ |
272 | ||
273 | return sprintf(buf, "%s\n", operstates[operstate]); | |
274 | } | |
6be8aeef | 275 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 276 | |
2d3b479d | 277 | static ssize_t carrier_changes_show(struct device *dev, |
278 | struct device_attribute *attr, | |
279 | char *buf) | |
280 | { | |
281 | struct net_device *netdev = to_net_dev(dev); | |
282 | return sprintf(buf, fmt_dec, | |
283 | atomic_read(&netdev->carrier_changes)); | |
284 | } | |
285 | static DEVICE_ATTR_RO(carrier_changes); | |
286 | ||
1da177e4 | 287 | /* read-write attributes */ |
1da177e4 | 288 | |
6b53dafe | 289 | static int change_mtu(struct net_device *dev, unsigned long new_mtu) |
1da177e4 | 290 | { |
6b53dafe | 291 | return dev_set_mtu(dev, (int) new_mtu); |
1da177e4 LT |
292 | } |
293 | ||
6be8aeef | 294 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 295 | const char *buf, size_t len) |
1da177e4 | 296 | { |
43cb76d9 | 297 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 298 | } |
6be8aeef | 299 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 | 300 | |
6b53dafe | 301 | static int change_flags(struct net_device *dev, unsigned long new_flags) |
1da177e4 | 302 | { |
6b53dafe | 303 | return dev_change_flags(dev, (unsigned int) new_flags); |
1da177e4 LT |
304 | } |
305 | ||
6be8aeef | 306 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 307 | const char *buf, size_t len) |
1da177e4 | 308 | { |
43cb76d9 | 309 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 310 | } |
6be8aeef | 311 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 | 312 | |
6b53dafe | 313 | static int change_tx_queue_len(struct net_device *dev, unsigned long new_len) |
1da177e4 | 314 | { |
6b53dafe | 315 | dev->tx_queue_len = new_len; |
1da177e4 LT |
316 | return 0; |
317 | } | |
318 | ||
6be8aeef | 319 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
320 | struct device_attribute *attr, |
321 | const char *buf, size_t len) | |
1da177e4 | 322 | { |
5e1fccc0 EB |
323 | if (!capable(CAP_NET_ADMIN)) |
324 | return -EPERM; | |
325 | ||
43cb76d9 | 326 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 | 327 | } |
6be8aeef | 328 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong); |
1da177e4 | 329 | |
3b47d303 ED |
330 | static int change_gro_flush_timeout(struct net_device *dev, unsigned long val) |
331 | { | |
332 | dev->gro_flush_timeout = val; | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static ssize_t gro_flush_timeout_store(struct device *dev, | |
337 | struct device_attribute *attr, | |
338 | const char *buf, size_t len) | |
339 | { | |
340 | if (!capable(CAP_NET_ADMIN)) | |
341 | return -EPERM; | |
342 | ||
343 | return netdev_store(dev, attr, buf, len, change_gro_flush_timeout); | |
344 | } | |
345 | NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong); | |
346 | ||
6be8aeef | 347 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
348 | const char *buf, size_t len) |
349 | { | |
350 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 351 | struct net *net = dev_net(netdev); |
0b815a1a SH |
352 | size_t count = len; |
353 | ssize_t ret; | |
354 | ||
5e1fccc0 | 355 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
356 | return -EPERM; |
357 | ||
358 | /* ignore trailing newline */ | |
359 | if (len > 0 && buf[len - 1] == '\n') | |
360 | --count; | |
361 | ||
336ca57c EB |
362 | if (!rtnl_trylock()) |
363 | return restart_syscall(); | |
0b815a1a SH |
364 | ret = dev_set_alias(netdev, buf, count); |
365 | rtnl_unlock(); | |
366 | ||
367 | return ret < 0 ? ret : len; | |
368 | } | |
369 | ||
6be8aeef | 370 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
371 | struct device_attribute *attr, char *buf) |
372 | { | |
373 | const struct net_device *netdev = to_net_dev(dev); | |
374 | ssize_t ret = 0; | |
375 | ||
336ca57c EB |
376 | if (!rtnl_trylock()) |
377 | return restart_syscall(); | |
0b815a1a SH |
378 | if (netdev->ifalias) |
379 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
380 | rtnl_unlock(); | |
381 | return ret; | |
382 | } | |
6be8aeef | 383 | static DEVICE_ATTR_RW(ifalias); |
a512b92b | 384 | |
6b53dafe | 385 | static int change_group(struct net_device *dev, unsigned long new_group) |
a512b92b | 386 | { |
6b53dafe | 387 | dev_set_group(dev, (int) new_group); |
a512b92b VD |
388 | return 0; |
389 | } | |
390 | ||
6be8aeef GKH |
391 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
392 | const char *buf, size_t len) | |
a512b92b VD |
393 | { |
394 | return netdev_store(dev, attr, buf, len, change_group); | |
395 | } | |
6be8aeef GKH |
396 | NETDEVICE_SHOW(group, fmt_dec); |
397 | static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); | |
398 | ||
cc998ff8 | 399 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
400 | struct device_attribute *attr, char *buf) |
401 | { | |
402 | struct net_device *netdev = to_net_dev(dev); | |
403 | ssize_t ret = -EINVAL; | |
404 | ||
405 | if (!rtnl_trylock()) | |
406 | return restart_syscall(); | |
407 | ||
408 | if (dev_isalive(netdev)) { | |
02637fce | 409 | struct netdev_phys_item_id ppid; |
ff80e519 JP |
410 | |
411 | ret = dev_get_phys_port_id(netdev, &ppid); | |
412 | if (!ret) | |
413 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
414 | } | |
415 | rtnl_unlock(); | |
416 | ||
417 | return ret; | |
418 | } | |
cc998ff8 LT |
419 | static DEVICE_ATTR_RO(phys_port_id); |
420 | ||
aecbe01e JP |
421 | static ssize_t phys_switch_id_show(struct device *dev, |
422 | struct device_attribute *attr, char *buf) | |
423 | { | |
424 | struct net_device *netdev = to_net_dev(dev); | |
425 | ssize_t ret = -EINVAL; | |
426 | ||
427 | if (!rtnl_trylock()) | |
428 | return restart_syscall(); | |
429 | ||
430 | if (dev_isalive(netdev)) { | |
431 | struct netdev_phys_item_id ppid; | |
432 | ||
433 | ret = netdev_switch_parent_id_get(netdev, &ppid); | |
434 | if (!ret) | |
435 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
436 | } | |
437 | rtnl_unlock(); | |
438 | ||
439 | return ret; | |
440 | } | |
441 | static DEVICE_ATTR_RO(phys_switch_id); | |
442 | ||
6be8aeef GKH |
443 | static struct attribute *net_class_attrs[] = { |
444 | &dev_attr_netdev_group.attr, | |
445 | &dev_attr_type.attr, | |
446 | &dev_attr_dev_id.attr, | |
3f85944f | 447 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
448 | &dev_attr_iflink.attr, |
449 | &dev_attr_ifindex.attr, | |
685343fc | 450 | &dev_attr_name_assign_type.attr, |
6be8aeef GKH |
451 | &dev_attr_addr_assign_type.attr, |
452 | &dev_attr_addr_len.attr, | |
453 | &dev_attr_link_mode.attr, | |
454 | &dev_attr_address.attr, | |
455 | &dev_attr_broadcast.attr, | |
456 | &dev_attr_speed.attr, | |
457 | &dev_attr_duplex.attr, | |
458 | &dev_attr_dormant.attr, | |
459 | &dev_attr_operstate.attr, | |
2d3b479d | 460 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
461 | &dev_attr_ifalias.attr, |
462 | &dev_attr_carrier.attr, | |
463 | &dev_attr_mtu.attr, | |
464 | &dev_attr_flags.attr, | |
465 | &dev_attr_tx_queue_len.attr, | |
3b47d303 | 466 | &dev_attr_gro_flush_timeout.attr, |
cc998ff8 | 467 | &dev_attr_phys_port_id.attr, |
aecbe01e | 468 | &dev_attr_phys_switch_id.attr, |
6be8aeef | 469 | NULL, |
1da177e4 | 470 | }; |
6be8aeef | 471 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
472 | |
473 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
474 | static ssize_t netstat_show(const struct device *d, |
475 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
476 | unsigned long offset) |
477 | { | |
43cb76d9 | 478 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
479 | ssize_t ret = -EINVAL; |
480 | ||
be1f3c2c BH |
481 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
482 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
483 | |
484 | read_lock(&dev_base_lock); | |
96e74088 | 485 | if (dev_isalive(dev)) { |
28172739 ED |
486 | struct rtnl_link_stats64 temp; |
487 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
488 | ||
be1f3c2c | 489 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 490 | } |
1da177e4 LT |
491 | read_unlock(&dev_base_lock); |
492 | return ret; | |
493 | } | |
494 | ||
495 | /* generate a read-only statistics attribute */ | |
496 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 497 | static ssize_t name##_show(struct device *d, \ |
43cb76d9 | 498 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 499 | { \ |
43cb76d9 | 500 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 501 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 502 | } \ |
6be8aeef | 503 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
504 | |
505 | NETSTAT_ENTRY(rx_packets); | |
506 | NETSTAT_ENTRY(tx_packets); | |
507 | NETSTAT_ENTRY(rx_bytes); | |
508 | NETSTAT_ENTRY(tx_bytes); | |
509 | NETSTAT_ENTRY(rx_errors); | |
510 | NETSTAT_ENTRY(tx_errors); | |
511 | NETSTAT_ENTRY(rx_dropped); | |
512 | NETSTAT_ENTRY(tx_dropped); | |
513 | NETSTAT_ENTRY(multicast); | |
514 | NETSTAT_ENTRY(collisions); | |
515 | NETSTAT_ENTRY(rx_length_errors); | |
516 | NETSTAT_ENTRY(rx_over_errors); | |
517 | NETSTAT_ENTRY(rx_crc_errors); | |
518 | NETSTAT_ENTRY(rx_frame_errors); | |
519 | NETSTAT_ENTRY(rx_fifo_errors); | |
520 | NETSTAT_ENTRY(rx_missed_errors); | |
521 | NETSTAT_ENTRY(tx_aborted_errors); | |
522 | NETSTAT_ENTRY(tx_carrier_errors); | |
523 | NETSTAT_ENTRY(tx_fifo_errors); | |
524 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
525 | NETSTAT_ENTRY(tx_window_errors); | |
526 | NETSTAT_ENTRY(rx_compressed); | |
527 | NETSTAT_ENTRY(tx_compressed); | |
528 | ||
529 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
530 | &dev_attr_rx_packets.attr, |
531 | &dev_attr_tx_packets.attr, | |
532 | &dev_attr_rx_bytes.attr, | |
533 | &dev_attr_tx_bytes.attr, | |
534 | &dev_attr_rx_errors.attr, | |
535 | &dev_attr_tx_errors.attr, | |
536 | &dev_attr_rx_dropped.attr, | |
537 | &dev_attr_tx_dropped.attr, | |
538 | &dev_attr_multicast.attr, | |
539 | &dev_attr_collisions.attr, | |
540 | &dev_attr_rx_length_errors.attr, | |
541 | &dev_attr_rx_over_errors.attr, | |
542 | &dev_attr_rx_crc_errors.attr, | |
543 | &dev_attr_rx_frame_errors.attr, | |
544 | &dev_attr_rx_fifo_errors.attr, | |
545 | &dev_attr_rx_missed_errors.attr, | |
546 | &dev_attr_tx_aborted_errors.attr, | |
547 | &dev_attr_tx_carrier_errors.attr, | |
548 | &dev_attr_tx_fifo_errors.attr, | |
549 | &dev_attr_tx_heartbeat_errors.attr, | |
550 | &dev_attr_tx_window_errors.attr, | |
551 | &dev_attr_rx_compressed.attr, | |
552 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
553 | NULL |
554 | }; | |
555 | ||
556 | ||
557 | static struct attribute_group netstat_group = { | |
558 | .name = "statistics", | |
559 | .attrs = netstat_attrs, | |
560 | }; | |
38c1a01c JB |
561 | |
562 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
563 | static struct attribute *wireless_attrs[] = { | |
564 | NULL | |
565 | }; | |
566 | ||
567 | static struct attribute_group wireless_group = { | |
568 | .name = "wireless", | |
569 | .attrs = wireless_attrs, | |
570 | }; | |
571 | #endif | |
6be8aeef GKH |
572 | |
573 | #else /* CONFIG_SYSFS */ | |
574 | #define net_class_groups NULL | |
d6523ddf | 575 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 576 | |
a953be53 | 577 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
578 | #define to_rx_queue_attr(_attr) container_of(_attr, \ |
579 | struct rx_queue_attribute, attr) | |
580 | ||
581 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
582 | ||
583 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
584 | char *buf) | |
585 | { | |
586 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
587 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
588 | ||
589 | if (!attribute->show) | |
590 | return -EIO; | |
591 | ||
592 | return attribute->show(queue, attribute, buf); | |
593 | } | |
594 | ||
595 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
596 | const char *buf, size_t count) | |
597 | { | |
598 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
599 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
600 | ||
601 | if (!attribute->store) | |
602 | return -EIO; | |
603 | ||
604 | return attribute->store(queue, attribute, buf, count); | |
605 | } | |
606 | ||
fa50d645 | 607 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
608 | .show = rx_queue_attr_show, |
609 | .store = rx_queue_attr_store, | |
610 | }; | |
611 | ||
a953be53 | 612 | #ifdef CONFIG_RPS |
0a9627f2 TH |
613 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, |
614 | struct rx_queue_attribute *attribute, char *buf) | |
615 | { | |
616 | struct rps_map *map; | |
617 | cpumask_var_t mask; | |
f0906827 | 618 | int i, len; |
0a9627f2 TH |
619 | |
620 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
621 | return -ENOMEM; | |
622 | ||
623 | rcu_read_lock(); | |
624 | map = rcu_dereference(queue->rps_map); | |
625 | if (map) | |
626 | for (i = 0; i < map->len; i++) | |
627 | cpumask_set_cpu(map->cpus[i], mask); | |
628 | ||
f0906827 | 629 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
0a9627f2 | 630 | rcu_read_unlock(); |
0a9627f2 | 631 | free_cpumask_var(mask); |
f0906827 TH |
632 | |
633 | return len < PAGE_SIZE ? len : -EINVAL; | |
0a9627f2 TH |
634 | } |
635 | ||
f5acb907 | 636 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
637 | struct rx_queue_attribute *attribute, |
638 | const char *buf, size_t len) | |
639 | { | |
640 | struct rps_map *old_map, *map; | |
641 | cpumask_var_t mask; | |
642 | int err, cpu, i; | |
643 | static DEFINE_SPINLOCK(rps_map_lock); | |
644 | ||
645 | if (!capable(CAP_NET_ADMIN)) | |
646 | return -EPERM; | |
647 | ||
648 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
649 | return -ENOMEM; | |
650 | ||
651 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
652 | if (err) { | |
653 | free_cpumask_var(mask); | |
654 | return err; | |
655 | } | |
656 | ||
95c96174 | 657 | map = kzalloc(max_t(unsigned int, |
0a9627f2 TH |
658 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
659 | GFP_KERNEL); | |
660 | if (!map) { | |
661 | free_cpumask_var(mask); | |
662 | return -ENOMEM; | |
663 | } | |
664 | ||
665 | i = 0; | |
666 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
667 | map->cpus[i++] = cpu; | |
668 | ||
669 | if (i) | |
670 | map->len = i; | |
671 | else { | |
672 | kfree(map); | |
673 | map = NULL; | |
674 | } | |
675 | ||
676 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
677 | old_map = rcu_dereference_protected(queue->rps_map, |
678 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
679 | rcu_assign_pointer(queue->rps_map, map); |
680 | spin_unlock(&rps_map_lock); | |
681 | ||
adc9300e | 682 | if (map) |
c5905afb | 683 | static_key_slow_inc(&rps_needed); |
adc9300e | 684 | if (old_map) { |
f6f80238 | 685 | kfree_rcu(old_map, rcu); |
c5905afb | 686 | static_key_slow_dec(&rps_needed); |
adc9300e | 687 | } |
0a9627f2 TH |
688 | free_cpumask_var(mask); |
689 | return len; | |
690 | } | |
691 | ||
fec5e652 TH |
692 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
693 | struct rx_queue_attribute *attr, | |
694 | char *buf) | |
695 | { | |
696 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 697 | unsigned long val = 0; |
fec5e652 TH |
698 | |
699 | rcu_read_lock(); | |
700 | flow_table = rcu_dereference(queue->rps_flow_table); | |
701 | if (flow_table) | |
60b778ce | 702 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
703 | rcu_read_unlock(); |
704 | ||
60b778ce | 705 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
706 | } |
707 | ||
fec5e652 TH |
708 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
709 | { | |
710 | struct rps_dev_flow_table *table = container_of(rcu, | |
711 | struct rps_dev_flow_table, rcu); | |
243198d0 | 712 | vfree(table); |
fec5e652 TH |
713 | } |
714 | ||
f5acb907 | 715 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
716 | struct rx_queue_attribute *attr, |
717 | const char *buf, size_t len) | |
718 | { | |
60b778ce | 719 | unsigned long mask, count; |
fec5e652 TH |
720 | struct rps_dev_flow_table *table, *old_table; |
721 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 722 | int rc; |
fec5e652 TH |
723 | |
724 | if (!capable(CAP_NET_ADMIN)) | |
725 | return -EPERM; | |
726 | ||
60b778ce ED |
727 | rc = kstrtoul(buf, 0, &count); |
728 | if (rc < 0) | |
729 | return rc; | |
fec5e652 TH |
730 | |
731 | if (count) { | |
60b778ce ED |
732 | mask = count - 1; |
733 | /* mask = roundup_pow_of_two(count) - 1; | |
734 | * without overflows... | |
735 | */ | |
736 | while ((mask | (mask >> 1)) != mask) | |
737 | mask |= (mask >> 1); | |
738 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 739 | * and on 32bit arches, must check |
740 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
741 | */ |
742 | #if BITS_PER_LONG > 32 | |
743 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 744 | return -EINVAL; |
60b778ce ED |
745 | #else |
746 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 747 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
748 | /* Enforce a limit to prevent overflow */ |
749 | return -EINVAL; | |
750 | } | |
60b778ce ED |
751 | #endif |
752 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
753 | if (!table) |
754 | return -ENOMEM; | |
755 | ||
60b778ce ED |
756 | table->mask = mask; |
757 | for (count = 0; count <= mask; count++) | |
758 | table->flows[count].cpu = RPS_NO_CPU; | |
fec5e652 TH |
759 | } else |
760 | table = NULL; | |
761 | ||
762 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
763 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
764 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
765 | rcu_assign_pointer(queue->rps_flow_table, table); |
766 | spin_unlock(&rps_dev_flow_lock); | |
767 | ||
768 | if (old_table) | |
769 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
770 | ||
771 | return len; | |
772 | } | |
773 | ||
0a9627f2 TH |
774 | static struct rx_queue_attribute rps_cpus_attribute = |
775 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
776 | ||
fec5e652 TH |
777 | |
778 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
779 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
780 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
a953be53 | 781 | #endif /* CONFIG_RPS */ |
fec5e652 | 782 | |
0a9627f2 | 783 | static struct attribute *rx_queue_default_attrs[] = { |
a953be53 | 784 | #ifdef CONFIG_RPS |
0a9627f2 | 785 | &rps_cpus_attribute.attr, |
fec5e652 | 786 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 787 | #endif |
0a9627f2 TH |
788 | NULL |
789 | }; | |
790 | ||
791 | static void rx_queue_release(struct kobject *kobj) | |
792 | { | |
793 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 794 | #ifdef CONFIG_RPS |
6e3f7faf ED |
795 | struct rps_map *map; |
796 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 797 | |
fec5e652 | 798 | |
33d480ce | 799 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
800 | if (map) { |
801 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 802 | kfree_rcu(map, rcu); |
9ea19481 | 803 | } |
6e3f7faf | 804 | |
33d480ce | 805 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
806 | if (flow_table) { |
807 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 808 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 809 | } |
a953be53 | 810 | #endif |
0a9627f2 | 811 | |
9ea19481 | 812 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 813 | dev_put(queue->dev); |
0a9627f2 TH |
814 | } |
815 | ||
82ef3d5d WC |
816 | static const void *rx_queue_namespace(struct kobject *kobj) |
817 | { | |
818 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
819 | struct device *dev = &queue->dev->dev; | |
820 | const void *ns = NULL; | |
821 | ||
822 | if (dev->class && dev->class->ns_type) | |
823 | ns = dev->class->namespace(dev); | |
824 | ||
825 | return ns; | |
826 | } | |
827 | ||
0a9627f2 TH |
828 | static struct kobj_type rx_queue_ktype = { |
829 | .sysfs_ops = &rx_queue_sysfs_ops, | |
830 | .release = rx_queue_release, | |
831 | .default_attrs = rx_queue_default_attrs, | |
82ef3d5d | 832 | .namespace = rx_queue_namespace |
0a9627f2 TH |
833 | }; |
834 | ||
6b53dafe | 835 | static int rx_queue_add_kobject(struct net_device *dev, int index) |
0a9627f2 | 836 | { |
6b53dafe | 837 | struct netdev_rx_queue *queue = dev->_rx + index; |
0a9627f2 TH |
838 | struct kobject *kobj = &queue->kobj; |
839 | int error = 0; | |
840 | ||
6b53dafe | 841 | kobj->kset = dev->queues_kset; |
0a9627f2 TH |
842 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, |
843 | "rx-%u", index); | |
a953be53 MD |
844 | if (error) |
845 | goto exit; | |
846 | ||
6b53dafe WC |
847 | if (dev->sysfs_rx_queue_group) { |
848 | error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group); | |
a953be53 MD |
849 | if (error) |
850 | goto exit; | |
0a9627f2 TH |
851 | } |
852 | ||
853 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 854 | dev_hold(queue->dev); |
0a9627f2 | 855 | |
a953be53 MD |
856 | return error; |
857 | exit: | |
858 | kobject_put(kobj); | |
0a9627f2 TH |
859 | return error; |
860 | } | |
80dd6eac | 861 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 862 | |
62fe0b40 | 863 | int |
6b53dafe | 864 | net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
0a9627f2 | 865 | { |
a953be53 | 866 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
867 | int i; |
868 | int error = 0; | |
869 | ||
a953be53 | 870 | #ifndef CONFIG_RPS |
6b53dafe | 871 | if (!dev->sysfs_rx_queue_group) |
a953be53 MD |
872 | return 0; |
873 | #endif | |
62fe0b40 | 874 | for (i = old_num; i < new_num; i++) { |
6b53dafe | 875 | error = rx_queue_add_kobject(dev, i); |
62fe0b40 BH |
876 | if (error) { |
877 | new_num = old_num; | |
0a9627f2 | 878 | break; |
62fe0b40 | 879 | } |
0a9627f2 TH |
880 | } |
881 | ||
a953be53 | 882 | while (--i >= new_num) { |
6b53dafe WC |
883 | if (dev->sysfs_rx_queue_group) |
884 | sysfs_remove_group(&dev->_rx[i].kobj, | |
885 | dev->sysfs_rx_queue_group); | |
886 | kobject_put(&dev->_rx[i].kobj); | |
a953be53 | 887 | } |
0a9627f2 TH |
888 | |
889 | return error; | |
bf264145 TH |
890 | #else |
891 | return 0; | |
892 | #endif | |
0a9627f2 TH |
893 | } |
894 | ||
ccf5ff69 | 895 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
896 | /* |
897 | * netdev_queue sysfs structures and functions. | |
898 | */ | |
899 | struct netdev_queue_attribute { | |
900 | struct attribute attr; | |
901 | ssize_t (*show)(struct netdev_queue *queue, | |
902 | struct netdev_queue_attribute *attr, char *buf); | |
903 | ssize_t (*store)(struct netdev_queue *queue, | |
904 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
905 | }; | |
906 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
907 | struct netdev_queue_attribute, attr) | |
908 | ||
909 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
910 | ||
911 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
912 | struct attribute *attr, char *buf) | |
913 | { | |
914 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
915 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
916 | ||
917 | if (!attribute->show) | |
918 | return -EIO; | |
919 | ||
920 | return attribute->show(queue, attribute, buf); | |
921 | } | |
922 | ||
923 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
924 | struct attribute *attr, | |
925 | const char *buf, size_t count) | |
926 | { | |
927 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
928 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
929 | ||
930 | if (!attribute->store) | |
931 | return -EIO; | |
932 | ||
933 | return attribute->store(queue, attribute, buf, count); | |
934 | } | |
935 | ||
936 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
937 | .show = netdev_queue_attr_show, | |
938 | .store = netdev_queue_attr_store, | |
939 | }; | |
940 | ||
ccf5ff69 | 941 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
942 | struct netdev_queue_attribute *attribute, | |
943 | char *buf) | |
944 | { | |
945 | unsigned long trans_timeout; | |
946 | ||
947 | spin_lock_irq(&queue->_xmit_lock); | |
948 | trans_timeout = queue->trans_timeout; | |
949 | spin_unlock_irq(&queue->_xmit_lock); | |
950 | ||
951 | return sprintf(buf, "%lu", trans_timeout); | |
952 | } | |
953 | ||
954 | static struct netdev_queue_attribute queue_trans_timeout = | |
955 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); | |
956 | ||
114cf580 TH |
957 | #ifdef CONFIG_BQL |
958 | /* | |
959 | * Byte queue limits sysfs structures and functions. | |
960 | */ | |
961 | static ssize_t bql_show(char *buf, unsigned int value) | |
962 | { | |
963 | return sprintf(buf, "%u\n", value); | |
964 | } | |
965 | ||
966 | static ssize_t bql_set(const char *buf, const size_t count, | |
967 | unsigned int *pvalue) | |
968 | { | |
969 | unsigned int value; | |
970 | int err; | |
971 | ||
972 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) | |
973 | value = DQL_MAX_LIMIT; | |
974 | else { | |
975 | err = kstrtouint(buf, 10, &value); | |
976 | if (err < 0) | |
977 | return err; | |
978 | if (value > DQL_MAX_LIMIT) | |
979 | return -EINVAL; | |
980 | } | |
981 | ||
982 | *pvalue = value; | |
983 | ||
984 | return count; | |
985 | } | |
986 | ||
987 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
988 | struct netdev_queue_attribute *attr, | |
989 | char *buf) | |
990 | { | |
991 | struct dql *dql = &queue->dql; | |
992 | ||
993 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
994 | } | |
995 | ||
996 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
997 | struct netdev_queue_attribute *attribute, | |
998 | const char *buf, size_t len) | |
999 | { | |
1000 | struct dql *dql = &queue->dql; | |
95c96174 | 1001 | unsigned int value; |
114cf580 TH |
1002 | int err; |
1003 | ||
1004 | err = kstrtouint(buf, 10, &value); | |
1005 | if (err < 0) | |
1006 | return err; | |
1007 | ||
1008 | dql->slack_hold_time = msecs_to_jiffies(value); | |
1009 | ||
1010 | return len; | |
1011 | } | |
1012 | ||
1013 | static struct netdev_queue_attribute bql_hold_time_attribute = | |
1014 | __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, | |
1015 | bql_set_hold_time); | |
1016 | ||
1017 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
1018 | struct netdev_queue_attribute *attr, | |
1019 | char *buf) | |
1020 | { | |
1021 | struct dql *dql = &queue->dql; | |
1022 | ||
1023 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
1024 | } | |
1025 | ||
1026 | static struct netdev_queue_attribute bql_inflight_attribute = | |
795d9a25 | 1027 | __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); |
114cf580 TH |
1028 | |
1029 | #define BQL_ATTR(NAME, FIELD) \ | |
1030 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
1031 | struct netdev_queue_attribute *attr, \ | |
1032 | char *buf) \ | |
1033 | { \ | |
1034 | return bql_show(buf, queue->dql.FIELD); \ | |
1035 | } \ | |
1036 | \ | |
1037 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
1038 | struct netdev_queue_attribute *attr, \ | |
1039 | const char *buf, size_t len) \ | |
1040 | { \ | |
1041 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
1042 | } \ | |
1043 | \ | |
1044 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ | |
1045 | __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ | |
1046 | bql_set_ ## NAME); | |
1047 | ||
1048 | BQL_ATTR(limit, limit) | |
1049 | BQL_ATTR(limit_max, max_limit) | |
1050 | BQL_ATTR(limit_min, min_limit) | |
1051 | ||
1052 | static struct attribute *dql_attrs[] = { | |
1053 | &bql_limit_attribute.attr, | |
1054 | &bql_limit_max_attribute.attr, | |
1055 | &bql_limit_min_attribute.attr, | |
1056 | &bql_hold_time_attribute.attr, | |
1057 | &bql_inflight_attribute.attr, | |
1058 | NULL | |
1059 | }; | |
1060 | ||
1061 | static struct attribute_group dql_group = { | |
1062 | .name = "byte_queue_limits", | |
1063 | .attrs = dql_attrs, | |
1064 | }; | |
1065 | #endif /* CONFIG_BQL */ | |
1066 | ||
ccf5ff69 | 1067 | #ifdef CONFIG_XPS |
ed1acc8c | 1068 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
0a9627f2 | 1069 | { |
1d24eb48 | 1070 | struct net_device *dev = queue->dev; |
ed1acc8c | 1071 | unsigned int i; |
1d24eb48 | 1072 | |
ed1acc8c | 1073 | i = queue - dev->_tx; |
1d24eb48 TH |
1074 | BUG_ON(i >= dev->num_tx_queues); |
1075 | ||
1076 | return i; | |
1077 | } | |
1078 | ||
1079 | ||
1080 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
1081 | struct netdev_queue_attribute *attribute, char *buf) | |
1082 | { | |
1083 | struct net_device *dev = queue->dev; | |
1084 | struct xps_dev_maps *dev_maps; | |
1085 | cpumask_var_t mask; | |
1086 | unsigned long index; | |
f0906827 | 1087 | int i, len; |
1d24eb48 TH |
1088 | |
1089 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
1090 | return -ENOMEM; | |
1091 | ||
1092 | index = get_netdev_queue_index(queue); | |
1093 | ||
1094 | rcu_read_lock(); | |
1095 | dev_maps = rcu_dereference(dev->xps_maps); | |
1096 | if (dev_maps) { | |
1097 | for_each_possible_cpu(i) { | |
1098 | struct xps_map *map = | |
1099 | rcu_dereference(dev_maps->cpu_map[i]); | |
1100 | if (map) { | |
1101 | int j; | |
1102 | for (j = 0; j < map->len; j++) { | |
1103 | if (map->queues[j] == index) { | |
1104 | cpumask_set_cpu(i, mask); | |
1105 | break; | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | } | |
1110 | } | |
1111 | rcu_read_unlock(); | |
1112 | ||
f0906827 | 1113 | len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask)); |
1d24eb48 | 1114 | free_cpumask_var(mask); |
f0906827 | 1115 | return len < PAGE_SIZE ? len : -EINVAL; |
1d24eb48 TH |
1116 | } |
1117 | ||
1d24eb48 TH |
1118 | static ssize_t store_xps_map(struct netdev_queue *queue, |
1119 | struct netdev_queue_attribute *attribute, | |
1120 | const char *buf, size_t len) | |
1121 | { | |
1122 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1123 | unsigned long index; |
537c00de AD |
1124 | cpumask_var_t mask; |
1125 | int err; | |
1d24eb48 TH |
1126 | |
1127 | if (!capable(CAP_NET_ADMIN)) | |
1128 | return -EPERM; | |
1129 | ||
1130 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1131 | return -ENOMEM; | |
1132 | ||
1133 | index = get_netdev_queue_index(queue); | |
1134 | ||
1135 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1136 | if (err) { | |
1137 | free_cpumask_var(mask); | |
1138 | return err; | |
1139 | } | |
1140 | ||
537c00de | 1141 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1142 | |
1143 | free_cpumask_var(mask); | |
1d24eb48 | 1144 | |
537c00de | 1145 | return err ? : len; |
1d24eb48 TH |
1146 | } |
1147 | ||
1148 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1149 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
ccf5ff69 | 1150 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1151 | |
1152 | static struct attribute *netdev_queue_default_attrs[] = { | |
ccf5ff69 | 1153 | &queue_trans_timeout.attr, |
1154 | #ifdef CONFIG_XPS | |
1d24eb48 | 1155 | &xps_cpus_attribute.attr, |
ccf5ff69 | 1156 | #endif |
1d24eb48 TH |
1157 | NULL |
1158 | }; | |
1159 | ||
1160 | static void netdev_queue_release(struct kobject *kobj) | |
1161 | { | |
1162 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1163 | |
1d24eb48 TH |
1164 | memset(kobj, 0, sizeof(*kobj)); |
1165 | dev_put(queue->dev); | |
1166 | } | |
1167 | ||
82ef3d5d WC |
1168 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1169 | { | |
1170 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1171 | struct device *dev = &queue->dev->dev; | |
1172 | const void *ns = NULL; | |
1173 | ||
1174 | if (dev->class && dev->class->ns_type) | |
1175 | ns = dev->class->namespace(dev); | |
1176 | ||
1177 | return ns; | |
1178 | } | |
1179 | ||
1d24eb48 TH |
1180 | static struct kobj_type netdev_queue_ktype = { |
1181 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1182 | .release = netdev_queue_release, | |
1183 | .default_attrs = netdev_queue_default_attrs, | |
82ef3d5d | 1184 | .namespace = netdev_queue_namespace, |
1d24eb48 TH |
1185 | }; |
1186 | ||
6b53dafe | 1187 | static int netdev_queue_add_kobject(struct net_device *dev, int index) |
1d24eb48 | 1188 | { |
6b53dafe | 1189 | struct netdev_queue *queue = dev->_tx + index; |
1d24eb48 TH |
1190 | struct kobject *kobj = &queue->kobj; |
1191 | int error = 0; | |
1192 | ||
6b53dafe | 1193 | kobj->kset = dev->queues_kset; |
1d24eb48 TH |
1194 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, |
1195 | "tx-%u", index); | |
114cf580 TH |
1196 | if (error) |
1197 | goto exit; | |
1198 | ||
1199 | #ifdef CONFIG_BQL | |
1200 | error = sysfs_create_group(kobj, &dql_group); | |
1201 | if (error) | |
1202 | goto exit; | |
1203 | #endif | |
1d24eb48 TH |
1204 | |
1205 | kobject_uevent(kobj, KOBJ_ADD); | |
1206 | dev_hold(queue->dev); | |
1207 | ||
114cf580 TH |
1208 | return 0; |
1209 | exit: | |
1210 | kobject_put(kobj); | |
1d24eb48 TH |
1211 | return error; |
1212 | } | |
ccf5ff69 | 1213 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1214 | |
1215 | int | |
6b53dafe | 1216 | netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num) |
1d24eb48 | 1217 | { |
ccf5ff69 | 1218 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1219 | int i; |
1220 | int error = 0; | |
1221 | ||
1222 | for (i = old_num; i < new_num; i++) { | |
6b53dafe | 1223 | error = netdev_queue_add_kobject(dev, i); |
1d24eb48 TH |
1224 | if (error) { |
1225 | new_num = old_num; | |
1226 | break; | |
1227 | } | |
1228 | } | |
1229 | ||
114cf580 | 1230 | while (--i >= new_num) { |
6b53dafe | 1231 | struct netdev_queue *queue = dev->_tx + i; |
114cf580 TH |
1232 | |
1233 | #ifdef CONFIG_BQL | |
1234 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1235 | #endif | |
1236 | kobject_put(&queue->kobj); | |
1237 | } | |
1d24eb48 TH |
1238 | |
1239 | return error; | |
bf264145 TH |
1240 | #else |
1241 | return 0; | |
ccf5ff69 | 1242 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1243 | } |
1244 | ||
6b53dafe | 1245 | static int register_queue_kobjects(struct net_device *dev) |
1d24eb48 | 1246 | { |
bf264145 | 1247 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1248 | |
ccf5ff69 | 1249 | #ifdef CONFIG_SYSFS |
6b53dafe WC |
1250 | dev->queues_kset = kset_create_and_add("queues", |
1251 | NULL, &dev->dev.kobj); | |
1252 | if (!dev->queues_kset) | |
62fe0b40 | 1253 | return -ENOMEM; |
6b53dafe | 1254 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1255 | #endif |
6b53dafe | 1256 | real_tx = dev->real_num_tx_queues; |
1d24eb48 | 1257 | |
6b53dafe | 1258 | error = net_rx_queue_update_kobjects(dev, 0, real_rx); |
1d24eb48 TH |
1259 | if (error) |
1260 | goto error; | |
bf264145 | 1261 | rxq = real_rx; |
1d24eb48 | 1262 | |
6b53dafe | 1263 | error = netdev_queue_update_kobjects(dev, 0, real_tx); |
1d24eb48 TH |
1264 | if (error) |
1265 | goto error; | |
bf264145 | 1266 | txq = real_tx; |
1d24eb48 TH |
1267 | |
1268 | return 0; | |
1269 | ||
1270 | error: | |
6b53dafe WC |
1271 | netdev_queue_update_kobjects(dev, txq, 0); |
1272 | net_rx_queue_update_kobjects(dev, rxq, 0); | |
1d24eb48 | 1273 | return error; |
62fe0b40 | 1274 | } |
0a9627f2 | 1275 | |
6b53dafe | 1276 | static void remove_queue_kobjects(struct net_device *dev) |
62fe0b40 | 1277 | { |
bf264145 TH |
1278 | int real_rx = 0, real_tx = 0; |
1279 | ||
a953be53 | 1280 | #ifdef CONFIG_SYSFS |
6b53dafe | 1281 | real_rx = dev->real_num_rx_queues; |
bf264145 | 1282 | #endif |
6b53dafe | 1283 | real_tx = dev->real_num_tx_queues; |
bf264145 | 1284 | |
6b53dafe WC |
1285 | net_rx_queue_update_kobjects(dev, real_rx, 0); |
1286 | netdev_queue_update_kobjects(dev, real_tx, 0); | |
ccf5ff69 | 1287 | #ifdef CONFIG_SYSFS |
6b53dafe | 1288 | kset_unregister(dev->queues_kset); |
bf264145 | 1289 | #endif |
0a9627f2 | 1290 | } |
608b4b95 | 1291 | |
7dc5dbc8 EB |
1292 | static bool net_current_may_mount(void) |
1293 | { | |
1294 | struct net *net = current->nsproxy->net_ns; | |
1295 | ||
1296 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1297 | } | |
1298 | ||
a685e089 | 1299 | static void *net_grab_current_ns(void) |
608b4b95 | 1300 | { |
a685e089 AV |
1301 | struct net *ns = current->nsproxy->net_ns; |
1302 | #ifdef CONFIG_NET_NS | |
1303 | if (ns) | |
1304 | atomic_inc(&ns->passive); | |
1305 | #endif | |
1306 | return ns; | |
608b4b95 EB |
1307 | } |
1308 | ||
1309 | static const void *net_initial_ns(void) | |
1310 | { | |
1311 | return &init_net; | |
1312 | } | |
1313 | ||
1314 | static const void *net_netlink_ns(struct sock *sk) | |
1315 | { | |
1316 | return sock_net(sk); | |
1317 | } | |
1318 | ||
04600794 | 1319 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1320 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1321 | .current_may_mount = net_current_may_mount, |
a685e089 | 1322 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1323 | .netlink_ns = net_netlink_ns, |
1324 | .initial_ns = net_initial_ns, | |
a685e089 | 1325 | .drop_ns = net_drop_ns, |
608b4b95 | 1326 | }; |
04600794 | 1327 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1328 | |
7eff2e7a | 1329 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1330 | { |
43cb76d9 | 1331 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1332 | int retval; |
1da177e4 | 1333 | |
312c004d | 1334 | /* pass interface to uevent. */ |
7eff2e7a | 1335 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1336 | if (retval) |
1337 | goto exit; | |
ca2f37db JT |
1338 | |
1339 | /* pass ifindex to uevent. | |
1340 | * ifindex is useful as it won't change (interface name may change) | |
1341 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1342 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1343 | |
bf62456e | 1344 | exit: |
bf62456e | 1345 | return retval; |
1da177e4 | 1346 | } |
1da177e4 LT |
1347 | |
1348 | /* | |
4ec93edb | 1349 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1350 | * Called when last reference to device kobject is gone. |
1da177e4 | 1351 | */ |
43cb76d9 | 1352 | static void netdev_release(struct device *d) |
1da177e4 | 1353 | { |
43cb76d9 | 1354 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1355 | |
1356 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1357 | ||
0b815a1a | 1358 | kfree(dev->ifalias); |
74d332c1 | 1359 | netdev_freemem(dev); |
1da177e4 LT |
1360 | } |
1361 | ||
608b4b95 EB |
1362 | static const void *net_namespace(struct device *d) |
1363 | { | |
1364 | struct net_device *dev; | |
1365 | dev = container_of(d, struct net_device, dev); | |
1366 | return dev_net(dev); | |
1367 | } | |
1368 | ||
1da177e4 LT |
1369 | static struct class net_class = { |
1370 | .name = "net", | |
43cb76d9 | 1371 | .dev_release = netdev_release, |
6be8aeef | 1372 | .dev_groups = net_class_groups, |
43cb76d9 | 1373 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1374 | .ns_type = &net_ns_type_operations, |
1375 | .namespace = net_namespace, | |
1da177e4 LT |
1376 | }; |
1377 | ||
aa836df9 FF |
1378 | #ifdef CONFIG_OF_NET |
1379 | static int of_dev_node_match(struct device *dev, const void *data) | |
1380 | { | |
1381 | int ret = 0; | |
1382 | ||
1383 | if (dev->parent) | |
1384 | ret = dev->parent->of_node == data; | |
1385 | ||
1386 | return ret == 0 ? dev->of_node == data : ret; | |
1387 | } | |
1388 | ||
1389 | struct net_device *of_find_net_device_by_node(struct device_node *np) | |
1390 | { | |
1391 | struct device *dev; | |
1392 | ||
1393 | dev = class_find_device(&net_class, NULL, np, of_dev_node_match); | |
1394 | if (!dev) | |
1395 | return NULL; | |
1396 | ||
1397 | return to_net_dev(dev); | |
1398 | } | |
1399 | EXPORT_SYMBOL(of_find_net_device_by_node); | |
1400 | #endif | |
1401 | ||
9093bbb2 SH |
1402 | /* Delete sysfs entries but hold kobject reference until after all |
1403 | * netdev references are gone. | |
1404 | */ | |
6b53dafe | 1405 | void netdev_unregister_kobject(struct net_device *ndev) |
1da177e4 | 1406 | { |
6b53dafe | 1407 | struct device *dev = &(ndev->dev); |
9093bbb2 SH |
1408 | |
1409 | kobject_get(&dev->kobj); | |
3891845e | 1410 | |
6b53dafe | 1411 | remove_queue_kobjects(ndev); |
0a9627f2 | 1412 | |
9802c8e2 ML |
1413 | pm_runtime_set_memalloc_noio(dev, false); |
1414 | ||
9093bbb2 | 1415 | device_del(dev); |
1da177e4 LT |
1416 | } |
1417 | ||
1418 | /* Create sysfs entries for network device. */ | |
6b53dafe | 1419 | int netdev_register_kobject(struct net_device *ndev) |
1da177e4 | 1420 | { |
6b53dafe WC |
1421 | struct device *dev = &(ndev->dev); |
1422 | const struct attribute_group **groups = ndev->sysfs_groups; | |
0a9627f2 | 1423 | int error = 0; |
1da177e4 | 1424 | |
a1b3f594 | 1425 | device_initialize(dev); |
43cb76d9 | 1426 | dev->class = &net_class; |
6b53dafe | 1427 | dev->platform_data = ndev; |
43cb76d9 | 1428 | dev->groups = groups; |
1da177e4 | 1429 | |
6b53dafe | 1430 | dev_set_name(dev, "%s", ndev->name); |
1da177e4 | 1431 | |
8b41d188 | 1432 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1433 | /* Allow for a device specific group */ |
1434 | if (*groups) | |
1435 | groups++; | |
1da177e4 | 1436 | |
0c509a6c | 1437 | *groups++ = &netstat_group; |
38c1a01c JB |
1438 | |
1439 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
6b53dafe | 1440 | if (ndev->ieee80211_ptr) |
38c1a01c JB |
1441 | *groups++ = &wireless_group; |
1442 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
6b53dafe | 1443 | else if (ndev->wireless_handlers) |
38c1a01c JB |
1444 | *groups++ = &wireless_group; |
1445 | #endif | |
1446 | #endif | |
8b41d188 | 1447 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1448 | |
0a9627f2 TH |
1449 | error = device_add(dev); |
1450 | if (error) | |
1451 | return error; | |
1452 | ||
6b53dafe | 1453 | error = register_queue_kobjects(ndev); |
0a9627f2 TH |
1454 | if (error) { |
1455 | device_del(dev); | |
1456 | return error; | |
1457 | } | |
1458 | ||
9802c8e2 ML |
1459 | pm_runtime_set_memalloc_noio(dev, true); |
1460 | ||
0a9627f2 | 1461 | return error; |
1da177e4 LT |
1462 | } |
1463 | ||
58292cbe TH |
1464 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
1465 | const void *ns) | |
b8a9787e | 1466 | { |
58292cbe | 1467 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1468 | } |
58292cbe | 1469 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1470 | |
58292cbe TH |
1471 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, |
1472 | const void *ns) | |
b8a9787e | 1473 | { |
58292cbe | 1474 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1475 | } |
58292cbe | 1476 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1477 | |
a48d4bb0 | 1478 | int __init netdev_kobject_init(void) |
1da177e4 | 1479 | { |
608b4b95 | 1480 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1481 | return class_register(&net_class); |
1482 | } |