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