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> | |
15 | #include <linux/if_arp.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
608b4b95 | 17 | #include <linux/nsproxy.h> |
1da177e4 | 18 | #include <net/sock.h> |
608b4b95 | 19 | #include <net/net_namespace.h> |
1da177e4 | 20 | #include <linux/rtnetlink.h> |
fec5e652 | 21 | #include <linux/vmalloc.h> |
bc3b2d7f | 22 | #include <linux/export.h> |
114cf580 | 23 | #include <linux/jiffies.h> |
9802c8e2 | 24 | #include <linux/pm_runtime.h> |
1da177e4 | 25 | |
342709ef PE |
26 | #include "net-sysfs.h" |
27 | ||
8b41d188 | 28 | #ifdef CONFIG_SYSFS |
1da177e4 | 29 | static const char fmt_hex[] = "%#x\n"; |
d1102b59 | 30 | static const char fmt_long_hex[] = "%#lx\n"; |
1da177e4 | 31 | static const char fmt_dec[] = "%d\n"; |
8ae6daca | 32 | static const char fmt_udec[] = "%u\n"; |
1da177e4 | 33 | static const char fmt_ulong[] = "%lu\n"; |
be1f3c2c | 34 | static const char fmt_u64[] = "%llu\n"; |
1da177e4 | 35 | |
4ec93edb | 36 | static inline int dev_isalive(const struct net_device *dev) |
1da177e4 | 37 | { |
fe9925b5 | 38 | return dev->reg_state <= NETREG_REGISTERED; |
1da177e4 LT |
39 | } |
40 | ||
41 | /* use same locking rules as GIF* ioctl's */ | |
43cb76d9 GKH |
42 | static ssize_t netdev_show(const struct device *dev, |
43 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
44 | ssize_t (*format)(const struct net_device *, char *)) |
45 | { | |
43cb76d9 | 46 | struct net_device *net = to_net_dev(dev); |
1da177e4 LT |
47 | ssize_t ret = -EINVAL; |
48 | ||
49 | read_lock(&dev_base_lock); | |
50 | if (dev_isalive(net)) | |
51 | ret = (*format)(net, buf); | |
52 | read_unlock(&dev_base_lock); | |
53 | ||
54 | return ret; | |
55 | } | |
56 | ||
57 | /* generate a show function for simple field */ | |
58 | #define NETDEVICE_SHOW(field, format_string) \ | |
59 | static ssize_t format_##field(const struct net_device *net, char *buf) \ | |
60 | { \ | |
61 | return sprintf(buf, format_string, net->field); \ | |
62 | } \ | |
6be8aeef | 63 | static ssize_t field##_show(struct device *dev, \ |
43cb76d9 | 64 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 65 | { \ |
43cb76d9 | 66 | return netdev_show(dev, attr, buf, format_##field); \ |
6be8aeef GKH |
67 | } \ |
68 | ||
69 | #define NETDEVICE_SHOW_RO(field, format_string) \ | |
70 | NETDEVICE_SHOW(field, format_string); \ | |
71 | static DEVICE_ATTR_RO(field) | |
1da177e4 | 72 | |
6be8aeef GKH |
73 | #define NETDEVICE_SHOW_RW(field, format_string) \ |
74 | NETDEVICE_SHOW(field, format_string); \ | |
75 | static DEVICE_ATTR_RW(field) | |
1da177e4 LT |
76 | |
77 | /* use same locking and permission rules as SIF* ioctl's */ | |
43cb76d9 | 78 | static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, |
1da177e4 LT |
79 | const char *buf, size_t len, |
80 | int (*set)(struct net_device *, unsigned long)) | |
81 | { | |
5e1fccc0 EB |
82 | struct net_device *netdev = to_net_dev(dev); |
83 | struct net *net = dev_net(netdev); | |
1da177e4 LT |
84 | unsigned long new; |
85 | int ret = -EINVAL; | |
86 | ||
5e1fccc0 | 87 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
1da177e4 LT |
88 | return -EPERM; |
89 | ||
e1e420c7 SK |
90 | ret = kstrtoul(buf, 0, &new); |
91 | if (ret) | |
1da177e4 LT |
92 | goto err; |
93 | ||
5a5990d3 | 94 | if (!rtnl_trylock()) |
336ca57c | 95 | return restart_syscall(); |
5a5990d3 | 96 | |
5e1fccc0 EB |
97 | if (dev_isalive(netdev)) { |
98 | if ((ret = (*set)(netdev, new)) == 0) | |
1da177e4 LT |
99 | ret = len; |
100 | } | |
101 | rtnl_unlock(); | |
102 | err: | |
103 | return ret; | |
104 | } | |
105 | ||
6be8aeef | 106 | NETDEVICE_SHOW_RO(dev_id, fmt_hex); |
3f85944f | 107 | NETDEVICE_SHOW_RO(dev_port, fmt_dec); |
6be8aeef GKH |
108 | NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec); |
109 | NETDEVICE_SHOW_RO(addr_len, fmt_dec); | |
110 | NETDEVICE_SHOW_RO(iflink, fmt_dec); | |
111 | NETDEVICE_SHOW_RO(ifindex, fmt_dec); | |
112 | NETDEVICE_SHOW_RO(type, fmt_dec); | |
113 | NETDEVICE_SHOW_RO(link_mode, fmt_dec); | |
1da177e4 LT |
114 | |
115 | /* use same locking rules as GIFHWADDR ioctl's */ | |
6be8aeef | 116 | static ssize_t address_show(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 117 | char *buf) |
1da177e4 LT |
118 | { |
119 | struct net_device *net = to_net_dev(dev); | |
120 | ssize_t ret = -EINVAL; | |
121 | ||
122 | read_lock(&dev_base_lock); | |
123 | if (dev_isalive(net)) | |
7ffc49a6 | 124 | ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len); |
1da177e4 LT |
125 | read_unlock(&dev_base_lock); |
126 | return ret; | |
127 | } | |
6be8aeef | 128 | static DEVICE_ATTR_RO(address); |
1da177e4 | 129 | |
6be8aeef GKH |
130 | static ssize_t broadcast_show(struct device *dev, |
131 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
132 | { |
133 | struct net_device *net = to_net_dev(dev); | |
134 | if (dev_isalive(net)) | |
7ffc49a6 | 135 | return sysfs_format_mac(buf, net->broadcast, net->addr_len); |
1da177e4 LT |
136 | return -EINVAL; |
137 | } | |
6be8aeef | 138 | static DEVICE_ATTR_RO(broadcast); |
1da177e4 | 139 | |
fdae0fde JP |
140 | static int change_carrier(struct net_device *net, unsigned long new_carrier) |
141 | { | |
142 | if (!netif_running(net)) | |
143 | return -EINVAL; | |
144 | return dev_change_carrier(net, (bool) new_carrier); | |
145 | } | |
146 | ||
6be8aeef GKH |
147 | static ssize_t carrier_store(struct device *dev, struct device_attribute *attr, |
148 | const char *buf, size_t len) | |
fdae0fde JP |
149 | { |
150 | return netdev_store(dev, attr, buf, len, change_carrier); | |
151 | } | |
152 | ||
6be8aeef | 153 | static ssize_t carrier_show(struct device *dev, |
43cb76d9 | 154 | struct device_attribute *attr, char *buf) |
1da177e4 LT |
155 | { |
156 | struct net_device *netdev = to_net_dev(dev); | |
157 | if (netif_running(netdev)) { | |
158 | return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev)); | |
159 | } | |
160 | return -EINVAL; | |
161 | } | |
6be8aeef | 162 | static DEVICE_ATTR_RW(carrier); |
1da177e4 | 163 | |
6be8aeef | 164 | static ssize_t speed_show(struct device *dev, |
d519e17e AG |
165 | struct device_attribute *attr, char *buf) |
166 | { | |
167 | struct net_device *netdev = to_net_dev(dev); | |
168 | int ret = -EINVAL; | |
169 | ||
170 | if (!rtnl_trylock()) | |
171 | return restart_syscall(); | |
172 | ||
8ae6daca DD |
173 | if (netif_running(netdev)) { |
174 | struct ethtool_cmd cmd; | |
4bc71cb9 | 175 | if (!__ethtool_get_settings(netdev, &cmd)) |
8ae6daca | 176 | ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); |
d519e17e AG |
177 | } |
178 | rtnl_unlock(); | |
179 | return ret; | |
180 | } | |
6be8aeef | 181 | static DEVICE_ATTR_RO(speed); |
d519e17e | 182 | |
6be8aeef | 183 | static ssize_t duplex_show(struct device *dev, |
d519e17e AG |
184 | struct device_attribute *attr, char *buf) |
185 | { | |
186 | struct net_device *netdev = to_net_dev(dev); | |
187 | int ret = -EINVAL; | |
188 | ||
189 | if (!rtnl_trylock()) | |
190 | return restart_syscall(); | |
191 | ||
8ae6daca DD |
192 | if (netif_running(netdev)) { |
193 | struct ethtool_cmd cmd; | |
c6c13965 NA |
194 | if (!__ethtool_get_settings(netdev, &cmd)) { |
195 | const char *duplex; | |
196 | switch (cmd.duplex) { | |
197 | case DUPLEX_HALF: | |
198 | duplex = "half"; | |
199 | break; | |
200 | case DUPLEX_FULL: | |
201 | duplex = "full"; | |
202 | break; | |
203 | default: | |
204 | duplex = "unknown"; | |
205 | break; | |
206 | } | |
207 | ret = sprintf(buf, "%s\n", duplex); | |
208 | } | |
d519e17e AG |
209 | } |
210 | rtnl_unlock(); | |
211 | return ret; | |
212 | } | |
6be8aeef | 213 | static DEVICE_ATTR_RO(duplex); |
d519e17e | 214 | |
6be8aeef | 215 | static ssize_t dormant_show(struct device *dev, |
43cb76d9 | 216 | struct device_attribute *attr, char *buf) |
b00055aa SR |
217 | { |
218 | struct net_device *netdev = to_net_dev(dev); | |
219 | ||
220 | if (netif_running(netdev)) | |
221 | return sprintf(buf, fmt_dec, !!netif_dormant(netdev)); | |
222 | ||
223 | return -EINVAL; | |
224 | } | |
6be8aeef | 225 | static DEVICE_ATTR_RO(dormant); |
b00055aa | 226 | |
36cbd3dc | 227 | static const char *const operstates[] = { |
b00055aa SR |
228 | "unknown", |
229 | "notpresent", /* currently unused */ | |
230 | "down", | |
231 | "lowerlayerdown", | |
232 | "testing", /* currently unused */ | |
233 | "dormant", | |
234 | "up" | |
235 | }; | |
236 | ||
6be8aeef | 237 | static ssize_t operstate_show(struct device *dev, |
43cb76d9 | 238 | struct device_attribute *attr, char *buf) |
b00055aa SR |
239 | { |
240 | const struct net_device *netdev = to_net_dev(dev); | |
241 | unsigned char operstate; | |
242 | ||
243 | read_lock(&dev_base_lock); | |
244 | operstate = netdev->operstate; | |
245 | if (!netif_running(netdev)) | |
246 | operstate = IF_OPER_DOWN; | |
247 | read_unlock(&dev_base_lock); | |
248 | ||
e3a5cd9e | 249 | if (operstate >= ARRAY_SIZE(operstates)) |
b00055aa SR |
250 | return -EINVAL; /* should not happen */ |
251 | ||
252 | return sprintf(buf, "%s\n", operstates[operstate]); | |
253 | } | |
6be8aeef | 254 | static DEVICE_ATTR_RO(operstate); |
b00055aa | 255 | |
2d3b479d | 256 | static ssize_t carrier_changes_show(struct device *dev, |
257 | struct device_attribute *attr, | |
258 | char *buf) | |
259 | { | |
260 | struct net_device *netdev = to_net_dev(dev); | |
261 | return sprintf(buf, fmt_dec, | |
262 | atomic_read(&netdev->carrier_changes)); | |
263 | } | |
264 | static DEVICE_ATTR_RO(carrier_changes); | |
265 | ||
1da177e4 | 266 | /* read-write attributes */ |
1da177e4 LT |
267 | |
268 | static int change_mtu(struct net_device *net, unsigned long new_mtu) | |
269 | { | |
270 | return dev_set_mtu(net, (int) new_mtu); | |
271 | } | |
272 | ||
6be8aeef | 273 | static ssize_t mtu_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 274 | const char *buf, size_t len) |
1da177e4 | 275 | { |
43cb76d9 | 276 | return netdev_store(dev, attr, buf, len, change_mtu); |
1da177e4 | 277 | } |
6be8aeef | 278 | NETDEVICE_SHOW_RW(mtu, fmt_dec); |
1da177e4 LT |
279 | |
280 | static int change_flags(struct net_device *net, unsigned long new_flags) | |
281 | { | |
95c96174 | 282 | return dev_change_flags(net, (unsigned int) new_flags); |
1da177e4 LT |
283 | } |
284 | ||
6be8aeef | 285 | static ssize_t flags_store(struct device *dev, struct device_attribute *attr, |
43cb76d9 | 286 | const char *buf, size_t len) |
1da177e4 | 287 | { |
43cb76d9 | 288 | return netdev_store(dev, attr, buf, len, change_flags); |
1da177e4 | 289 | } |
6be8aeef | 290 | NETDEVICE_SHOW_RW(flags, fmt_hex); |
1da177e4 LT |
291 | |
292 | static int change_tx_queue_len(struct net_device *net, unsigned long new_len) | |
293 | { | |
294 | net->tx_queue_len = new_len; | |
295 | return 0; | |
296 | } | |
297 | ||
6be8aeef | 298 | static ssize_t tx_queue_len_store(struct device *dev, |
43cb76d9 GKH |
299 | struct device_attribute *attr, |
300 | const char *buf, size_t len) | |
1da177e4 | 301 | { |
5e1fccc0 EB |
302 | if (!capable(CAP_NET_ADMIN)) |
303 | return -EPERM; | |
304 | ||
43cb76d9 | 305 | return netdev_store(dev, attr, buf, len, change_tx_queue_len); |
1da177e4 | 306 | } |
6be8aeef | 307 | NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong); |
1da177e4 | 308 | |
6be8aeef | 309 | static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr, |
0b815a1a SH |
310 | const char *buf, size_t len) |
311 | { | |
312 | struct net_device *netdev = to_net_dev(dev); | |
5e1fccc0 | 313 | struct net *net = dev_net(netdev); |
0b815a1a SH |
314 | size_t count = len; |
315 | ssize_t ret; | |
316 | ||
5e1fccc0 | 317 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
0b815a1a SH |
318 | return -EPERM; |
319 | ||
320 | /* ignore trailing newline */ | |
321 | if (len > 0 && buf[len - 1] == '\n') | |
322 | --count; | |
323 | ||
336ca57c EB |
324 | if (!rtnl_trylock()) |
325 | return restart_syscall(); | |
0b815a1a SH |
326 | ret = dev_set_alias(netdev, buf, count); |
327 | rtnl_unlock(); | |
328 | ||
329 | return ret < 0 ? ret : len; | |
330 | } | |
331 | ||
6be8aeef | 332 | static ssize_t ifalias_show(struct device *dev, |
0b815a1a SH |
333 | struct device_attribute *attr, char *buf) |
334 | { | |
335 | const struct net_device *netdev = to_net_dev(dev); | |
336 | ssize_t ret = 0; | |
337 | ||
336ca57c EB |
338 | if (!rtnl_trylock()) |
339 | return restart_syscall(); | |
0b815a1a SH |
340 | if (netdev->ifalias) |
341 | ret = sprintf(buf, "%s\n", netdev->ifalias); | |
342 | rtnl_unlock(); | |
343 | return ret; | |
344 | } | |
6be8aeef | 345 | static DEVICE_ATTR_RW(ifalias); |
a512b92b VD |
346 | |
347 | static int change_group(struct net_device *net, unsigned long new_group) | |
348 | { | |
349 | dev_set_group(net, (int) new_group); | |
350 | return 0; | |
351 | } | |
352 | ||
6be8aeef GKH |
353 | static ssize_t group_store(struct device *dev, struct device_attribute *attr, |
354 | const char *buf, size_t len) | |
a512b92b VD |
355 | { |
356 | return netdev_store(dev, attr, buf, len, change_group); | |
357 | } | |
6be8aeef GKH |
358 | NETDEVICE_SHOW(group, fmt_dec); |
359 | static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store); | |
360 | ||
cc998ff8 | 361 | static ssize_t phys_port_id_show(struct device *dev, |
ff80e519 JP |
362 | struct device_attribute *attr, char *buf) |
363 | { | |
364 | struct net_device *netdev = to_net_dev(dev); | |
365 | ssize_t ret = -EINVAL; | |
366 | ||
367 | if (!rtnl_trylock()) | |
368 | return restart_syscall(); | |
369 | ||
370 | if (dev_isalive(netdev)) { | |
371 | struct netdev_phys_port_id ppid; | |
372 | ||
373 | ret = dev_get_phys_port_id(netdev, &ppid); | |
374 | if (!ret) | |
375 | ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id); | |
376 | } | |
377 | rtnl_unlock(); | |
378 | ||
379 | return ret; | |
380 | } | |
cc998ff8 LT |
381 | static DEVICE_ATTR_RO(phys_port_id); |
382 | ||
6be8aeef GKH |
383 | static struct attribute *net_class_attrs[] = { |
384 | &dev_attr_netdev_group.attr, | |
385 | &dev_attr_type.attr, | |
386 | &dev_attr_dev_id.attr, | |
3f85944f | 387 | &dev_attr_dev_port.attr, |
6be8aeef GKH |
388 | &dev_attr_iflink.attr, |
389 | &dev_attr_ifindex.attr, | |
390 | &dev_attr_addr_assign_type.attr, | |
391 | &dev_attr_addr_len.attr, | |
392 | &dev_attr_link_mode.attr, | |
393 | &dev_attr_address.attr, | |
394 | &dev_attr_broadcast.attr, | |
395 | &dev_attr_speed.attr, | |
396 | &dev_attr_duplex.attr, | |
397 | &dev_attr_dormant.attr, | |
398 | &dev_attr_operstate.attr, | |
2d3b479d | 399 | &dev_attr_carrier_changes.attr, |
6be8aeef GKH |
400 | &dev_attr_ifalias.attr, |
401 | &dev_attr_carrier.attr, | |
402 | &dev_attr_mtu.attr, | |
403 | &dev_attr_flags.attr, | |
404 | &dev_attr_tx_queue_len.attr, | |
cc998ff8 | 405 | &dev_attr_phys_port_id.attr, |
6be8aeef | 406 | NULL, |
1da177e4 | 407 | }; |
6be8aeef | 408 | ATTRIBUTE_GROUPS(net_class); |
1da177e4 LT |
409 | |
410 | /* Show a given an attribute in the statistics group */ | |
43cb76d9 GKH |
411 | static ssize_t netstat_show(const struct device *d, |
412 | struct device_attribute *attr, char *buf, | |
1da177e4 LT |
413 | unsigned long offset) |
414 | { | |
43cb76d9 | 415 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
416 | ssize_t ret = -EINVAL; |
417 | ||
be1f3c2c BH |
418 | WARN_ON(offset > sizeof(struct rtnl_link_stats64) || |
419 | offset % sizeof(u64) != 0); | |
1da177e4 LT |
420 | |
421 | read_lock(&dev_base_lock); | |
96e74088 | 422 | if (dev_isalive(dev)) { |
28172739 ED |
423 | struct rtnl_link_stats64 temp; |
424 | const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp); | |
425 | ||
be1f3c2c | 426 | ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset)); |
96e74088 | 427 | } |
1da177e4 LT |
428 | read_unlock(&dev_base_lock); |
429 | return ret; | |
430 | } | |
431 | ||
432 | /* generate a read-only statistics attribute */ | |
433 | #define NETSTAT_ENTRY(name) \ | |
6be8aeef | 434 | static ssize_t name##_show(struct device *d, \ |
43cb76d9 | 435 | struct device_attribute *attr, char *buf) \ |
1da177e4 | 436 | { \ |
43cb76d9 | 437 | return netstat_show(d, attr, buf, \ |
be1f3c2c | 438 | offsetof(struct rtnl_link_stats64, name)); \ |
1da177e4 | 439 | } \ |
6be8aeef | 440 | static DEVICE_ATTR_RO(name) |
1da177e4 LT |
441 | |
442 | NETSTAT_ENTRY(rx_packets); | |
443 | NETSTAT_ENTRY(tx_packets); | |
444 | NETSTAT_ENTRY(rx_bytes); | |
445 | NETSTAT_ENTRY(tx_bytes); | |
446 | NETSTAT_ENTRY(rx_errors); | |
447 | NETSTAT_ENTRY(tx_errors); | |
448 | NETSTAT_ENTRY(rx_dropped); | |
449 | NETSTAT_ENTRY(tx_dropped); | |
450 | NETSTAT_ENTRY(multicast); | |
451 | NETSTAT_ENTRY(collisions); | |
452 | NETSTAT_ENTRY(rx_length_errors); | |
453 | NETSTAT_ENTRY(rx_over_errors); | |
454 | NETSTAT_ENTRY(rx_crc_errors); | |
455 | NETSTAT_ENTRY(rx_frame_errors); | |
456 | NETSTAT_ENTRY(rx_fifo_errors); | |
457 | NETSTAT_ENTRY(rx_missed_errors); | |
458 | NETSTAT_ENTRY(tx_aborted_errors); | |
459 | NETSTAT_ENTRY(tx_carrier_errors); | |
460 | NETSTAT_ENTRY(tx_fifo_errors); | |
461 | NETSTAT_ENTRY(tx_heartbeat_errors); | |
462 | NETSTAT_ENTRY(tx_window_errors); | |
463 | NETSTAT_ENTRY(rx_compressed); | |
464 | NETSTAT_ENTRY(tx_compressed); | |
465 | ||
466 | static struct attribute *netstat_attrs[] = { | |
43cb76d9 GKH |
467 | &dev_attr_rx_packets.attr, |
468 | &dev_attr_tx_packets.attr, | |
469 | &dev_attr_rx_bytes.attr, | |
470 | &dev_attr_tx_bytes.attr, | |
471 | &dev_attr_rx_errors.attr, | |
472 | &dev_attr_tx_errors.attr, | |
473 | &dev_attr_rx_dropped.attr, | |
474 | &dev_attr_tx_dropped.attr, | |
475 | &dev_attr_multicast.attr, | |
476 | &dev_attr_collisions.attr, | |
477 | &dev_attr_rx_length_errors.attr, | |
478 | &dev_attr_rx_over_errors.attr, | |
479 | &dev_attr_rx_crc_errors.attr, | |
480 | &dev_attr_rx_frame_errors.attr, | |
481 | &dev_attr_rx_fifo_errors.attr, | |
482 | &dev_attr_rx_missed_errors.attr, | |
483 | &dev_attr_tx_aborted_errors.attr, | |
484 | &dev_attr_tx_carrier_errors.attr, | |
485 | &dev_attr_tx_fifo_errors.attr, | |
486 | &dev_attr_tx_heartbeat_errors.attr, | |
487 | &dev_attr_tx_window_errors.attr, | |
488 | &dev_attr_rx_compressed.attr, | |
489 | &dev_attr_tx_compressed.attr, | |
1da177e4 LT |
490 | NULL |
491 | }; | |
492 | ||
493 | ||
494 | static struct attribute_group netstat_group = { | |
495 | .name = "statistics", | |
496 | .attrs = netstat_attrs, | |
497 | }; | |
38c1a01c JB |
498 | |
499 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
500 | static struct attribute *wireless_attrs[] = { | |
501 | NULL | |
502 | }; | |
503 | ||
504 | static struct attribute_group wireless_group = { | |
505 | .name = "wireless", | |
506 | .attrs = wireless_attrs, | |
507 | }; | |
508 | #endif | |
6be8aeef GKH |
509 | |
510 | #else /* CONFIG_SYSFS */ | |
511 | #define net_class_groups NULL | |
d6523ddf | 512 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 513 | |
a953be53 | 514 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
515 | #define to_rx_queue_attr(_attr) container_of(_attr, \ |
516 | struct rx_queue_attribute, attr) | |
517 | ||
518 | #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj) | |
519 | ||
520 | static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr, | |
521 | char *buf) | |
522 | { | |
523 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
524 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
525 | ||
526 | if (!attribute->show) | |
527 | return -EIO; | |
528 | ||
529 | return attribute->show(queue, attribute, buf); | |
530 | } | |
531 | ||
532 | static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr, | |
533 | const char *buf, size_t count) | |
534 | { | |
535 | struct rx_queue_attribute *attribute = to_rx_queue_attr(attr); | |
536 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
537 | ||
538 | if (!attribute->store) | |
539 | return -EIO; | |
540 | ||
541 | return attribute->store(queue, attribute, buf, count); | |
542 | } | |
543 | ||
fa50d645 | 544 | static const struct sysfs_ops rx_queue_sysfs_ops = { |
0a9627f2 TH |
545 | .show = rx_queue_attr_show, |
546 | .store = rx_queue_attr_store, | |
547 | }; | |
548 | ||
a953be53 | 549 | #ifdef CONFIG_RPS |
0a9627f2 TH |
550 | static ssize_t show_rps_map(struct netdev_rx_queue *queue, |
551 | struct rx_queue_attribute *attribute, char *buf) | |
552 | { | |
553 | struct rps_map *map; | |
554 | cpumask_var_t mask; | |
555 | size_t len = 0; | |
556 | int i; | |
557 | ||
558 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
559 | return -ENOMEM; | |
560 | ||
561 | rcu_read_lock(); | |
562 | map = rcu_dereference(queue->rps_map); | |
563 | if (map) | |
564 | for (i = 0; i < map->len; i++) | |
565 | cpumask_set_cpu(map->cpus[i], mask); | |
566 | ||
567 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
568 | if (PAGE_SIZE - len < 3) { | |
569 | rcu_read_unlock(); | |
570 | free_cpumask_var(mask); | |
571 | return -EINVAL; | |
572 | } | |
573 | rcu_read_unlock(); | |
574 | ||
575 | free_cpumask_var(mask); | |
576 | len += sprintf(buf + len, "\n"); | |
577 | return len; | |
578 | } | |
579 | ||
f5acb907 | 580 | static ssize_t store_rps_map(struct netdev_rx_queue *queue, |
0a9627f2 TH |
581 | struct rx_queue_attribute *attribute, |
582 | const char *buf, size_t len) | |
583 | { | |
584 | struct rps_map *old_map, *map; | |
585 | cpumask_var_t mask; | |
586 | int err, cpu, i; | |
587 | static DEFINE_SPINLOCK(rps_map_lock); | |
588 | ||
589 | if (!capable(CAP_NET_ADMIN)) | |
590 | return -EPERM; | |
591 | ||
592 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
593 | return -ENOMEM; | |
594 | ||
595 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
596 | if (err) { | |
597 | free_cpumask_var(mask); | |
598 | return err; | |
599 | } | |
600 | ||
95c96174 | 601 | map = kzalloc(max_t(unsigned int, |
0a9627f2 TH |
602 | RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES), |
603 | GFP_KERNEL); | |
604 | if (!map) { | |
605 | free_cpumask_var(mask); | |
606 | return -ENOMEM; | |
607 | } | |
608 | ||
609 | i = 0; | |
610 | for_each_cpu_and(cpu, mask, cpu_online_mask) | |
611 | map->cpus[i++] = cpu; | |
612 | ||
613 | if (i) | |
614 | map->len = i; | |
615 | else { | |
616 | kfree(map); | |
617 | map = NULL; | |
618 | } | |
619 | ||
620 | spin_lock(&rps_map_lock); | |
6e3f7faf ED |
621 | old_map = rcu_dereference_protected(queue->rps_map, |
622 | lockdep_is_held(&rps_map_lock)); | |
0a9627f2 TH |
623 | rcu_assign_pointer(queue->rps_map, map); |
624 | spin_unlock(&rps_map_lock); | |
625 | ||
adc9300e | 626 | if (map) |
c5905afb | 627 | static_key_slow_inc(&rps_needed); |
adc9300e | 628 | if (old_map) { |
f6f80238 | 629 | kfree_rcu(old_map, rcu); |
c5905afb | 630 | static_key_slow_dec(&rps_needed); |
adc9300e | 631 | } |
0a9627f2 TH |
632 | free_cpumask_var(mask); |
633 | return len; | |
634 | } | |
635 | ||
fec5e652 TH |
636 | static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
637 | struct rx_queue_attribute *attr, | |
638 | char *buf) | |
639 | { | |
640 | struct rps_dev_flow_table *flow_table; | |
60b778ce | 641 | unsigned long val = 0; |
fec5e652 TH |
642 | |
643 | rcu_read_lock(); | |
644 | flow_table = rcu_dereference(queue->rps_flow_table); | |
645 | if (flow_table) | |
60b778ce | 646 | val = (unsigned long)flow_table->mask + 1; |
fec5e652 TH |
647 | rcu_read_unlock(); |
648 | ||
60b778ce | 649 | return sprintf(buf, "%lu\n", val); |
fec5e652 TH |
650 | } |
651 | ||
fec5e652 TH |
652 | static void rps_dev_flow_table_release(struct rcu_head *rcu) |
653 | { | |
654 | struct rps_dev_flow_table *table = container_of(rcu, | |
655 | struct rps_dev_flow_table, rcu); | |
243198d0 | 656 | vfree(table); |
fec5e652 TH |
657 | } |
658 | ||
f5acb907 | 659 | static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue, |
fec5e652 TH |
660 | struct rx_queue_attribute *attr, |
661 | const char *buf, size_t len) | |
662 | { | |
60b778ce | 663 | unsigned long mask, count; |
fec5e652 TH |
664 | struct rps_dev_flow_table *table, *old_table; |
665 | static DEFINE_SPINLOCK(rps_dev_flow_lock); | |
60b778ce | 666 | int rc; |
fec5e652 TH |
667 | |
668 | if (!capable(CAP_NET_ADMIN)) | |
669 | return -EPERM; | |
670 | ||
60b778ce ED |
671 | rc = kstrtoul(buf, 0, &count); |
672 | if (rc < 0) | |
673 | return rc; | |
fec5e652 TH |
674 | |
675 | if (count) { | |
60b778ce ED |
676 | mask = count - 1; |
677 | /* mask = roundup_pow_of_two(count) - 1; | |
678 | * without overflows... | |
679 | */ | |
680 | while ((mask | (mask >> 1)) != mask) | |
681 | mask |= (mask >> 1); | |
682 | /* On 64 bit arches, must check mask fits in table->mask (u32), | |
8e3bff96 | 683 | * and on 32bit arches, must check |
684 | * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow. | |
60b778ce ED |
685 | */ |
686 | #if BITS_PER_LONG > 32 | |
687 | if (mask > (unsigned long)(u32)mask) | |
a0a129f8 | 688 | return -EINVAL; |
60b778ce ED |
689 | #else |
690 | if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1)) | |
a0a129f8 | 691 | / sizeof(struct rps_dev_flow)) { |
fec5e652 TH |
692 | /* Enforce a limit to prevent overflow */ |
693 | return -EINVAL; | |
694 | } | |
60b778ce ED |
695 | #endif |
696 | table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1)); | |
fec5e652 TH |
697 | if (!table) |
698 | return -ENOMEM; | |
699 | ||
60b778ce ED |
700 | table->mask = mask; |
701 | for (count = 0; count <= mask; count++) | |
702 | table->flows[count].cpu = RPS_NO_CPU; | |
fec5e652 TH |
703 | } else |
704 | table = NULL; | |
705 | ||
706 | spin_lock(&rps_dev_flow_lock); | |
6e3f7faf ED |
707 | old_table = rcu_dereference_protected(queue->rps_flow_table, |
708 | lockdep_is_held(&rps_dev_flow_lock)); | |
fec5e652 TH |
709 | rcu_assign_pointer(queue->rps_flow_table, table); |
710 | spin_unlock(&rps_dev_flow_lock); | |
711 | ||
712 | if (old_table) | |
713 | call_rcu(&old_table->rcu, rps_dev_flow_table_release); | |
714 | ||
715 | return len; | |
716 | } | |
717 | ||
0a9627f2 TH |
718 | static struct rx_queue_attribute rps_cpus_attribute = |
719 | __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map); | |
720 | ||
fec5e652 TH |
721 | |
722 | static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute = | |
723 | __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR, | |
724 | show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt); | |
a953be53 | 725 | #endif /* CONFIG_RPS */ |
fec5e652 | 726 | |
0a9627f2 | 727 | static struct attribute *rx_queue_default_attrs[] = { |
a953be53 | 728 | #ifdef CONFIG_RPS |
0a9627f2 | 729 | &rps_cpus_attribute.attr, |
fec5e652 | 730 | &rps_dev_flow_table_cnt_attribute.attr, |
a953be53 | 731 | #endif |
0a9627f2 TH |
732 | NULL |
733 | }; | |
734 | ||
735 | static void rx_queue_release(struct kobject *kobj) | |
736 | { | |
737 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
a953be53 | 738 | #ifdef CONFIG_RPS |
6e3f7faf ED |
739 | struct rps_map *map; |
740 | struct rps_dev_flow_table *flow_table; | |
0a9627f2 | 741 | |
fec5e652 | 742 | |
33d480ce | 743 | map = rcu_dereference_protected(queue->rps_map, 1); |
9ea19481 JF |
744 | if (map) { |
745 | RCU_INIT_POINTER(queue->rps_map, NULL); | |
f6f80238 | 746 | kfree_rcu(map, rcu); |
9ea19481 | 747 | } |
6e3f7faf | 748 | |
33d480ce | 749 | flow_table = rcu_dereference_protected(queue->rps_flow_table, 1); |
9ea19481 JF |
750 | if (flow_table) { |
751 | RCU_INIT_POINTER(queue->rps_flow_table, NULL); | |
6e3f7faf | 752 | call_rcu(&flow_table->rcu, rps_dev_flow_table_release); |
9ea19481 | 753 | } |
a953be53 | 754 | #endif |
0a9627f2 | 755 | |
9ea19481 | 756 | memset(kobj, 0, sizeof(*kobj)); |
fe822240 | 757 | dev_put(queue->dev); |
0a9627f2 TH |
758 | } |
759 | ||
82ef3d5d WC |
760 | static const void *rx_queue_namespace(struct kobject *kobj) |
761 | { | |
762 | struct netdev_rx_queue *queue = to_rx_queue(kobj); | |
763 | struct device *dev = &queue->dev->dev; | |
764 | const void *ns = NULL; | |
765 | ||
766 | if (dev->class && dev->class->ns_type) | |
767 | ns = dev->class->namespace(dev); | |
768 | ||
769 | return ns; | |
770 | } | |
771 | ||
0a9627f2 TH |
772 | static struct kobj_type rx_queue_ktype = { |
773 | .sysfs_ops = &rx_queue_sysfs_ops, | |
774 | .release = rx_queue_release, | |
775 | .default_attrs = rx_queue_default_attrs, | |
82ef3d5d | 776 | .namespace = rx_queue_namespace |
0a9627f2 TH |
777 | }; |
778 | ||
779 | static int rx_queue_add_kobject(struct net_device *net, int index) | |
780 | { | |
781 | struct netdev_rx_queue *queue = net->_rx + index; | |
782 | struct kobject *kobj = &queue->kobj; | |
783 | int error = 0; | |
784 | ||
785 | kobj->kset = net->queues_kset; | |
786 | error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL, | |
787 | "rx-%u", index); | |
a953be53 MD |
788 | if (error) |
789 | goto exit; | |
790 | ||
791 | if (net->sysfs_rx_queue_group) { | |
792 | error = sysfs_create_group(kobj, net->sysfs_rx_queue_group); | |
793 | if (error) | |
794 | goto exit; | |
0a9627f2 TH |
795 | } |
796 | ||
797 | kobject_uevent(kobj, KOBJ_ADD); | |
fe822240 | 798 | dev_hold(queue->dev); |
0a9627f2 | 799 | |
a953be53 MD |
800 | return error; |
801 | exit: | |
802 | kobject_put(kobj); | |
0a9627f2 TH |
803 | return error; |
804 | } | |
80dd6eac | 805 | #endif /* CONFIG_SYSFS */ |
0a9627f2 | 806 | |
62fe0b40 BH |
807 | int |
808 | net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
0a9627f2 | 809 | { |
a953be53 | 810 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
811 | int i; |
812 | int error = 0; | |
813 | ||
a953be53 MD |
814 | #ifndef CONFIG_RPS |
815 | if (!net->sysfs_rx_queue_group) | |
816 | return 0; | |
817 | #endif | |
62fe0b40 | 818 | for (i = old_num; i < new_num; i++) { |
0a9627f2 | 819 | error = rx_queue_add_kobject(net, i); |
62fe0b40 BH |
820 | if (error) { |
821 | new_num = old_num; | |
0a9627f2 | 822 | break; |
62fe0b40 | 823 | } |
0a9627f2 TH |
824 | } |
825 | ||
a953be53 MD |
826 | while (--i >= new_num) { |
827 | if (net->sysfs_rx_queue_group) | |
828 | sysfs_remove_group(&net->_rx[i].kobj, | |
829 | net->sysfs_rx_queue_group); | |
62fe0b40 | 830 | kobject_put(&net->_rx[i].kobj); |
a953be53 | 831 | } |
0a9627f2 TH |
832 | |
833 | return error; | |
bf264145 TH |
834 | #else |
835 | return 0; | |
836 | #endif | |
0a9627f2 TH |
837 | } |
838 | ||
ccf5ff69 | 839 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
840 | /* |
841 | * netdev_queue sysfs structures and functions. | |
842 | */ | |
843 | struct netdev_queue_attribute { | |
844 | struct attribute attr; | |
845 | ssize_t (*show)(struct netdev_queue *queue, | |
846 | struct netdev_queue_attribute *attr, char *buf); | |
847 | ssize_t (*store)(struct netdev_queue *queue, | |
848 | struct netdev_queue_attribute *attr, const char *buf, size_t len); | |
849 | }; | |
850 | #define to_netdev_queue_attr(_attr) container_of(_attr, \ | |
851 | struct netdev_queue_attribute, attr) | |
852 | ||
853 | #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj) | |
854 | ||
855 | static ssize_t netdev_queue_attr_show(struct kobject *kobj, | |
856 | struct attribute *attr, char *buf) | |
857 | { | |
858 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
859 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
860 | ||
861 | if (!attribute->show) | |
862 | return -EIO; | |
863 | ||
864 | return attribute->show(queue, attribute, buf); | |
865 | } | |
866 | ||
867 | static ssize_t netdev_queue_attr_store(struct kobject *kobj, | |
868 | struct attribute *attr, | |
869 | const char *buf, size_t count) | |
870 | { | |
871 | struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr); | |
872 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
873 | ||
874 | if (!attribute->store) | |
875 | return -EIO; | |
876 | ||
877 | return attribute->store(queue, attribute, buf, count); | |
878 | } | |
879 | ||
880 | static const struct sysfs_ops netdev_queue_sysfs_ops = { | |
881 | .show = netdev_queue_attr_show, | |
882 | .store = netdev_queue_attr_store, | |
883 | }; | |
884 | ||
ccf5ff69 | 885 | static ssize_t show_trans_timeout(struct netdev_queue *queue, |
886 | struct netdev_queue_attribute *attribute, | |
887 | char *buf) | |
888 | { | |
889 | unsigned long trans_timeout; | |
890 | ||
891 | spin_lock_irq(&queue->_xmit_lock); | |
892 | trans_timeout = queue->trans_timeout; | |
893 | spin_unlock_irq(&queue->_xmit_lock); | |
894 | ||
895 | return sprintf(buf, "%lu", trans_timeout); | |
896 | } | |
897 | ||
898 | static struct netdev_queue_attribute queue_trans_timeout = | |
899 | __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL); | |
900 | ||
114cf580 TH |
901 | #ifdef CONFIG_BQL |
902 | /* | |
903 | * Byte queue limits sysfs structures and functions. | |
904 | */ | |
905 | static ssize_t bql_show(char *buf, unsigned int value) | |
906 | { | |
907 | return sprintf(buf, "%u\n", value); | |
908 | } | |
909 | ||
910 | static ssize_t bql_set(const char *buf, const size_t count, | |
911 | unsigned int *pvalue) | |
912 | { | |
913 | unsigned int value; | |
914 | int err; | |
915 | ||
916 | if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) | |
917 | value = DQL_MAX_LIMIT; | |
918 | else { | |
919 | err = kstrtouint(buf, 10, &value); | |
920 | if (err < 0) | |
921 | return err; | |
922 | if (value > DQL_MAX_LIMIT) | |
923 | return -EINVAL; | |
924 | } | |
925 | ||
926 | *pvalue = value; | |
927 | ||
928 | return count; | |
929 | } | |
930 | ||
931 | static ssize_t bql_show_hold_time(struct netdev_queue *queue, | |
932 | struct netdev_queue_attribute *attr, | |
933 | char *buf) | |
934 | { | |
935 | struct dql *dql = &queue->dql; | |
936 | ||
937 | return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time)); | |
938 | } | |
939 | ||
940 | static ssize_t bql_set_hold_time(struct netdev_queue *queue, | |
941 | struct netdev_queue_attribute *attribute, | |
942 | const char *buf, size_t len) | |
943 | { | |
944 | struct dql *dql = &queue->dql; | |
95c96174 | 945 | unsigned int value; |
114cf580 TH |
946 | int err; |
947 | ||
948 | err = kstrtouint(buf, 10, &value); | |
949 | if (err < 0) | |
950 | return err; | |
951 | ||
952 | dql->slack_hold_time = msecs_to_jiffies(value); | |
953 | ||
954 | return len; | |
955 | } | |
956 | ||
957 | static struct netdev_queue_attribute bql_hold_time_attribute = | |
958 | __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time, | |
959 | bql_set_hold_time); | |
960 | ||
961 | static ssize_t bql_show_inflight(struct netdev_queue *queue, | |
962 | struct netdev_queue_attribute *attr, | |
963 | char *buf) | |
964 | { | |
965 | struct dql *dql = &queue->dql; | |
966 | ||
967 | return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed); | |
968 | } | |
969 | ||
970 | static struct netdev_queue_attribute bql_inflight_attribute = | |
795d9a25 | 971 | __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL); |
114cf580 TH |
972 | |
973 | #define BQL_ATTR(NAME, FIELD) \ | |
974 | static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \ | |
975 | struct netdev_queue_attribute *attr, \ | |
976 | char *buf) \ | |
977 | { \ | |
978 | return bql_show(buf, queue->dql.FIELD); \ | |
979 | } \ | |
980 | \ | |
981 | static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \ | |
982 | struct netdev_queue_attribute *attr, \ | |
983 | const char *buf, size_t len) \ | |
984 | { \ | |
985 | return bql_set(buf, len, &queue->dql.FIELD); \ | |
986 | } \ | |
987 | \ | |
988 | static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \ | |
989 | __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \ | |
990 | bql_set_ ## NAME); | |
991 | ||
992 | BQL_ATTR(limit, limit) | |
993 | BQL_ATTR(limit_max, max_limit) | |
994 | BQL_ATTR(limit_min, min_limit) | |
995 | ||
996 | static struct attribute *dql_attrs[] = { | |
997 | &bql_limit_attribute.attr, | |
998 | &bql_limit_max_attribute.attr, | |
999 | &bql_limit_min_attribute.attr, | |
1000 | &bql_hold_time_attribute.attr, | |
1001 | &bql_inflight_attribute.attr, | |
1002 | NULL | |
1003 | }; | |
1004 | ||
1005 | static struct attribute_group dql_group = { | |
1006 | .name = "byte_queue_limits", | |
1007 | .attrs = dql_attrs, | |
1008 | }; | |
1009 | #endif /* CONFIG_BQL */ | |
1010 | ||
ccf5ff69 | 1011 | #ifdef CONFIG_XPS |
ed1acc8c | 1012 | static unsigned int get_netdev_queue_index(struct netdev_queue *queue) |
0a9627f2 | 1013 | { |
1d24eb48 | 1014 | struct net_device *dev = queue->dev; |
ed1acc8c | 1015 | unsigned int i; |
1d24eb48 | 1016 | |
ed1acc8c | 1017 | i = queue - dev->_tx; |
1d24eb48 TH |
1018 | BUG_ON(i >= dev->num_tx_queues); |
1019 | ||
1020 | return i; | |
1021 | } | |
1022 | ||
1023 | ||
1024 | static ssize_t show_xps_map(struct netdev_queue *queue, | |
1025 | struct netdev_queue_attribute *attribute, char *buf) | |
1026 | { | |
1027 | struct net_device *dev = queue->dev; | |
1028 | struct xps_dev_maps *dev_maps; | |
1029 | cpumask_var_t mask; | |
1030 | unsigned long index; | |
1031 | size_t len = 0; | |
1032 | int i; | |
1033 | ||
1034 | if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) | |
1035 | return -ENOMEM; | |
1036 | ||
1037 | index = get_netdev_queue_index(queue); | |
1038 | ||
1039 | rcu_read_lock(); | |
1040 | dev_maps = rcu_dereference(dev->xps_maps); | |
1041 | if (dev_maps) { | |
1042 | for_each_possible_cpu(i) { | |
1043 | struct xps_map *map = | |
1044 | rcu_dereference(dev_maps->cpu_map[i]); | |
1045 | if (map) { | |
1046 | int j; | |
1047 | for (j = 0; j < map->len; j++) { | |
1048 | if (map->queues[j] == index) { | |
1049 | cpumask_set_cpu(i, mask); | |
1050 | break; | |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | rcu_read_unlock(); | |
1057 | ||
1058 | len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask); | |
1059 | if (PAGE_SIZE - len < 3) { | |
1060 | free_cpumask_var(mask); | |
1061 | return -EINVAL; | |
1062 | } | |
1063 | ||
1064 | free_cpumask_var(mask); | |
1065 | len += sprintf(buf + len, "\n"); | |
1066 | return len; | |
1067 | } | |
1068 | ||
1d24eb48 TH |
1069 | static ssize_t store_xps_map(struct netdev_queue *queue, |
1070 | struct netdev_queue_attribute *attribute, | |
1071 | const char *buf, size_t len) | |
1072 | { | |
1073 | struct net_device *dev = queue->dev; | |
1d24eb48 | 1074 | unsigned long index; |
537c00de AD |
1075 | cpumask_var_t mask; |
1076 | int err; | |
1d24eb48 TH |
1077 | |
1078 | if (!capable(CAP_NET_ADMIN)) | |
1079 | return -EPERM; | |
1080 | ||
1081 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) | |
1082 | return -ENOMEM; | |
1083 | ||
1084 | index = get_netdev_queue_index(queue); | |
1085 | ||
1086 | err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits); | |
1087 | if (err) { | |
1088 | free_cpumask_var(mask); | |
1089 | return err; | |
1090 | } | |
1091 | ||
537c00de | 1092 | err = netif_set_xps_queue(dev, mask, index); |
1d24eb48 TH |
1093 | |
1094 | free_cpumask_var(mask); | |
1d24eb48 | 1095 | |
537c00de | 1096 | return err ? : len; |
1d24eb48 TH |
1097 | } |
1098 | ||
1099 | static struct netdev_queue_attribute xps_cpus_attribute = | |
1100 | __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map); | |
ccf5ff69 | 1101 | #endif /* CONFIG_XPS */ |
1d24eb48 TH |
1102 | |
1103 | static struct attribute *netdev_queue_default_attrs[] = { | |
ccf5ff69 | 1104 | &queue_trans_timeout.attr, |
1105 | #ifdef CONFIG_XPS | |
1d24eb48 | 1106 | &xps_cpus_attribute.attr, |
ccf5ff69 | 1107 | #endif |
1d24eb48 TH |
1108 | NULL |
1109 | }; | |
1110 | ||
1111 | static void netdev_queue_release(struct kobject *kobj) | |
1112 | { | |
1113 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1d24eb48 | 1114 | |
1d24eb48 TH |
1115 | memset(kobj, 0, sizeof(*kobj)); |
1116 | dev_put(queue->dev); | |
1117 | } | |
1118 | ||
82ef3d5d WC |
1119 | static const void *netdev_queue_namespace(struct kobject *kobj) |
1120 | { | |
1121 | struct netdev_queue *queue = to_netdev_queue(kobj); | |
1122 | struct device *dev = &queue->dev->dev; | |
1123 | const void *ns = NULL; | |
1124 | ||
1125 | if (dev->class && dev->class->ns_type) | |
1126 | ns = dev->class->namespace(dev); | |
1127 | ||
1128 | return ns; | |
1129 | } | |
1130 | ||
1d24eb48 TH |
1131 | static struct kobj_type netdev_queue_ktype = { |
1132 | .sysfs_ops = &netdev_queue_sysfs_ops, | |
1133 | .release = netdev_queue_release, | |
1134 | .default_attrs = netdev_queue_default_attrs, | |
82ef3d5d | 1135 | .namespace = netdev_queue_namespace, |
1d24eb48 TH |
1136 | }; |
1137 | ||
1138 | static int netdev_queue_add_kobject(struct net_device *net, int index) | |
1139 | { | |
1140 | struct netdev_queue *queue = net->_tx + index; | |
1141 | struct kobject *kobj = &queue->kobj; | |
1142 | int error = 0; | |
1143 | ||
1144 | kobj->kset = net->queues_kset; | |
1145 | error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, | |
1146 | "tx-%u", index); | |
114cf580 TH |
1147 | if (error) |
1148 | goto exit; | |
1149 | ||
1150 | #ifdef CONFIG_BQL | |
1151 | error = sysfs_create_group(kobj, &dql_group); | |
1152 | if (error) | |
1153 | goto exit; | |
1154 | #endif | |
1d24eb48 TH |
1155 | |
1156 | kobject_uevent(kobj, KOBJ_ADD); | |
1157 | dev_hold(queue->dev); | |
1158 | ||
114cf580 TH |
1159 | return 0; |
1160 | exit: | |
1161 | kobject_put(kobj); | |
1d24eb48 TH |
1162 | return error; |
1163 | } | |
ccf5ff69 | 1164 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1165 | |
1166 | int | |
1167 | netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num) | |
1168 | { | |
ccf5ff69 | 1169 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
1170 | int i; |
1171 | int error = 0; | |
1172 | ||
1173 | for (i = old_num; i < new_num; i++) { | |
1174 | error = netdev_queue_add_kobject(net, i); | |
1175 | if (error) { | |
1176 | new_num = old_num; | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | ||
114cf580 TH |
1181 | while (--i >= new_num) { |
1182 | struct netdev_queue *queue = net->_tx + i; | |
1183 | ||
1184 | #ifdef CONFIG_BQL | |
1185 | sysfs_remove_group(&queue->kobj, &dql_group); | |
1186 | #endif | |
1187 | kobject_put(&queue->kobj); | |
1188 | } | |
1d24eb48 TH |
1189 | |
1190 | return error; | |
bf264145 TH |
1191 | #else |
1192 | return 0; | |
ccf5ff69 | 1193 | #endif /* CONFIG_SYSFS */ |
1d24eb48 TH |
1194 | } |
1195 | ||
1196 | static int register_queue_kobjects(struct net_device *net) | |
1197 | { | |
bf264145 | 1198 | int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0; |
1d24eb48 | 1199 | |
ccf5ff69 | 1200 | #ifdef CONFIG_SYSFS |
62fe0b40 BH |
1201 | net->queues_kset = kset_create_and_add("queues", |
1202 | NULL, &net->dev.kobj); | |
1203 | if (!net->queues_kset) | |
1204 | return -ENOMEM; | |
bf264145 TH |
1205 | real_rx = net->real_num_rx_queues; |
1206 | #endif | |
1207 | real_tx = net->real_num_tx_queues; | |
1d24eb48 | 1208 | |
bf264145 | 1209 | error = net_rx_queue_update_kobjects(net, 0, real_rx); |
1d24eb48 TH |
1210 | if (error) |
1211 | goto error; | |
bf264145 | 1212 | rxq = real_rx; |
1d24eb48 | 1213 | |
bf264145 | 1214 | error = netdev_queue_update_kobjects(net, 0, real_tx); |
1d24eb48 TH |
1215 | if (error) |
1216 | goto error; | |
bf264145 | 1217 | txq = real_tx; |
1d24eb48 TH |
1218 | |
1219 | return 0; | |
1220 | ||
1221 | error: | |
1222 | netdev_queue_update_kobjects(net, txq, 0); | |
1223 | net_rx_queue_update_kobjects(net, rxq, 0); | |
1224 | return error; | |
62fe0b40 | 1225 | } |
0a9627f2 | 1226 | |
1d24eb48 | 1227 | static void remove_queue_kobjects(struct net_device *net) |
62fe0b40 | 1228 | { |
bf264145 TH |
1229 | int real_rx = 0, real_tx = 0; |
1230 | ||
a953be53 | 1231 | #ifdef CONFIG_SYSFS |
bf264145 TH |
1232 | real_rx = net->real_num_rx_queues; |
1233 | #endif | |
1234 | real_tx = net->real_num_tx_queues; | |
1235 | ||
1236 | net_rx_queue_update_kobjects(net, real_rx, 0); | |
1237 | netdev_queue_update_kobjects(net, real_tx, 0); | |
ccf5ff69 | 1238 | #ifdef CONFIG_SYSFS |
0a9627f2 | 1239 | kset_unregister(net->queues_kset); |
bf264145 | 1240 | #endif |
0a9627f2 | 1241 | } |
608b4b95 | 1242 | |
7dc5dbc8 EB |
1243 | static bool net_current_may_mount(void) |
1244 | { | |
1245 | struct net *net = current->nsproxy->net_ns; | |
1246 | ||
1247 | return ns_capable(net->user_ns, CAP_SYS_ADMIN); | |
1248 | } | |
1249 | ||
a685e089 | 1250 | static void *net_grab_current_ns(void) |
608b4b95 | 1251 | { |
a685e089 AV |
1252 | struct net *ns = current->nsproxy->net_ns; |
1253 | #ifdef CONFIG_NET_NS | |
1254 | if (ns) | |
1255 | atomic_inc(&ns->passive); | |
1256 | #endif | |
1257 | return ns; | |
608b4b95 EB |
1258 | } |
1259 | ||
1260 | static const void *net_initial_ns(void) | |
1261 | { | |
1262 | return &init_net; | |
1263 | } | |
1264 | ||
1265 | static const void *net_netlink_ns(struct sock *sk) | |
1266 | { | |
1267 | return sock_net(sk); | |
1268 | } | |
1269 | ||
04600794 | 1270 | struct kobj_ns_type_operations net_ns_type_operations = { |
608b4b95 | 1271 | .type = KOBJ_NS_TYPE_NET, |
7dc5dbc8 | 1272 | .current_may_mount = net_current_may_mount, |
a685e089 | 1273 | .grab_current_ns = net_grab_current_ns, |
608b4b95 EB |
1274 | .netlink_ns = net_netlink_ns, |
1275 | .initial_ns = net_initial_ns, | |
a685e089 | 1276 | .drop_ns = net_drop_ns, |
608b4b95 | 1277 | }; |
04600794 | 1278 | EXPORT_SYMBOL_GPL(net_ns_type_operations); |
608b4b95 | 1279 | |
7eff2e7a | 1280 | static int netdev_uevent(struct device *d, struct kobj_uevent_env *env) |
1da177e4 | 1281 | { |
43cb76d9 | 1282 | struct net_device *dev = to_net_dev(d); |
7eff2e7a | 1283 | int retval; |
1da177e4 | 1284 | |
312c004d | 1285 | /* pass interface to uevent. */ |
7eff2e7a | 1286 | retval = add_uevent_var(env, "INTERFACE=%s", dev->name); |
bf62456e ER |
1287 | if (retval) |
1288 | goto exit; | |
ca2f37db JT |
1289 | |
1290 | /* pass ifindex to uevent. | |
1291 | * ifindex is useful as it won't change (interface name may change) | |
1292 | * and is what RtNetlink uses natively. */ | |
7eff2e7a | 1293 | retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex); |
1da177e4 | 1294 | |
bf62456e | 1295 | exit: |
bf62456e | 1296 | return retval; |
1da177e4 | 1297 | } |
1da177e4 LT |
1298 | |
1299 | /* | |
4ec93edb | 1300 | * netdev_release -- destroy and free a dead device. |
43cb76d9 | 1301 | * Called when last reference to device kobject is gone. |
1da177e4 | 1302 | */ |
43cb76d9 | 1303 | static void netdev_release(struct device *d) |
1da177e4 | 1304 | { |
43cb76d9 | 1305 | struct net_device *dev = to_net_dev(d); |
1da177e4 LT |
1306 | |
1307 | BUG_ON(dev->reg_state != NETREG_RELEASED); | |
1308 | ||
0b815a1a | 1309 | kfree(dev->ifalias); |
74d332c1 | 1310 | netdev_freemem(dev); |
1da177e4 LT |
1311 | } |
1312 | ||
608b4b95 EB |
1313 | static const void *net_namespace(struct device *d) |
1314 | { | |
1315 | struct net_device *dev; | |
1316 | dev = container_of(d, struct net_device, dev); | |
1317 | return dev_net(dev); | |
1318 | } | |
1319 | ||
1da177e4 LT |
1320 | static struct class net_class = { |
1321 | .name = "net", | |
43cb76d9 | 1322 | .dev_release = netdev_release, |
6be8aeef | 1323 | .dev_groups = net_class_groups, |
43cb76d9 | 1324 | .dev_uevent = netdev_uevent, |
608b4b95 EB |
1325 | .ns_type = &net_ns_type_operations, |
1326 | .namespace = net_namespace, | |
1da177e4 LT |
1327 | }; |
1328 | ||
9093bbb2 SH |
1329 | /* Delete sysfs entries but hold kobject reference until after all |
1330 | * netdev references are gone. | |
1331 | */ | |
8b41d188 | 1332 | void netdev_unregister_kobject(struct net_device * net) |
1da177e4 | 1333 | { |
9093bbb2 SH |
1334 | struct device *dev = &(net->dev); |
1335 | ||
1336 | kobject_get(&dev->kobj); | |
3891845e | 1337 | |
1d24eb48 | 1338 | remove_queue_kobjects(net); |
0a9627f2 | 1339 | |
9802c8e2 ML |
1340 | pm_runtime_set_memalloc_noio(dev, false); |
1341 | ||
9093bbb2 | 1342 | device_del(dev); |
1da177e4 LT |
1343 | } |
1344 | ||
1345 | /* Create sysfs entries for network device. */ | |
8b41d188 | 1346 | int netdev_register_kobject(struct net_device *net) |
1da177e4 | 1347 | { |
43cb76d9 | 1348 | struct device *dev = &(net->dev); |
a4dbd674 | 1349 | const struct attribute_group **groups = net->sysfs_groups; |
0a9627f2 | 1350 | int error = 0; |
1da177e4 | 1351 | |
a1b3f594 | 1352 | device_initialize(dev); |
43cb76d9 GKH |
1353 | dev->class = &net_class; |
1354 | dev->platform_data = net; | |
1355 | dev->groups = groups; | |
1da177e4 | 1356 | |
a2205472 | 1357 | dev_set_name(dev, "%s", net->name); |
1da177e4 | 1358 | |
8b41d188 | 1359 | #ifdef CONFIG_SYSFS |
0c509a6c EB |
1360 | /* Allow for a device specific group */ |
1361 | if (*groups) | |
1362 | groups++; | |
1da177e4 | 1363 | |
0c509a6c | 1364 | *groups++ = &netstat_group; |
38c1a01c JB |
1365 | |
1366 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211) | |
1367 | if (net->ieee80211_ptr) | |
1368 | *groups++ = &wireless_group; | |
1369 | #if IS_ENABLED(CONFIG_WIRELESS_EXT) | |
1370 | else if (net->wireless_handlers) | |
1371 | *groups++ = &wireless_group; | |
1372 | #endif | |
1373 | #endif | |
8b41d188 | 1374 | #endif /* CONFIG_SYSFS */ |
1da177e4 | 1375 | |
0a9627f2 TH |
1376 | error = device_add(dev); |
1377 | if (error) | |
1378 | return error; | |
1379 | ||
1d24eb48 | 1380 | error = register_queue_kobjects(net); |
0a9627f2 TH |
1381 | if (error) { |
1382 | device_del(dev); | |
1383 | return error; | |
1384 | } | |
1385 | ||
9802c8e2 ML |
1386 | pm_runtime_set_memalloc_noio(dev, true); |
1387 | ||
0a9627f2 | 1388 | return error; |
1da177e4 LT |
1389 | } |
1390 | ||
58292cbe TH |
1391 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
1392 | const void *ns) | |
b8a9787e | 1393 | { |
58292cbe | 1394 | return class_create_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1395 | } |
58292cbe | 1396 | EXPORT_SYMBOL(netdev_class_create_file_ns); |
b8a9787e | 1397 | |
58292cbe TH |
1398 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, |
1399 | const void *ns) | |
b8a9787e | 1400 | { |
58292cbe | 1401 | class_remove_file_ns(&net_class, class_attr, ns); |
b8a9787e | 1402 | } |
58292cbe | 1403 | EXPORT_SYMBOL(netdev_class_remove_file_ns); |
b8a9787e | 1404 | |
a48d4bb0 | 1405 | int __init netdev_kobject_init(void) |
1da177e4 | 1406 | { |
608b4b95 | 1407 | kobj_ns_type_register(&net_ns_type_operations); |
1da177e4 LT |
1408 | return class_register(&net_class); |
1409 | } |