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