bnx2x: Add Nic partitioning mode (57712 devices)
[deliverable/linux.git] / net / core / net-sysfs.c
CommitLineData
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
LT
20#include <linux/rtnetlink.h>
21#include <linux/wireless.h>
fec5e652 22#include <linux/vmalloc.h>
8f1546ca 23#include <net/wext.h>
1da177e4 24
342709ef
PE
25#include "net-sysfs.h"
26
8b41d188 27#ifdef CONFIG_SYSFS
1da177e4 28static const char fmt_hex[] = "%#x\n";
d1102b59 29static const char fmt_long_hex[] = "%#lx\n";
1da177e4
LT
30static const char fmt_dec[] = "%d\n";
31static const char fmt_ulong[] = "%lu\n";
be1f3c2c 32static const char fmt_u64[] = "%llu\n";
1da177e4 33
4ec93edb 34static inline int dev_isalive(const struct net_device *dev)
1da177e4 35{
fe9925b5 36 return dev->reg_state <= NETREG_REGISTERED;
1da177e4
LT
37}
38
39/* use same locking rules as GIF* ioctl's */
43cb76d9
GKH
40static ssize_t netdev_show(const struct device *dev,
41 struct device_attribute *attr, char *buf,
1da177e4
LT
42 ssize_t (*format)(const struct net_device *, char *))
43{
43cb76d9 44 struct net_device *net = to_net_dev(dev);
1da177e4
LT
45 ssize_t ret = -EINVAL;
46
47 read_lock(&dev_base_lock);
48 if (dev_isalive(net))
49 ret = (*format)(net, buf);
50 read_unlock(&dev_base_lock);
51
52 return ret;
53}
54
55/* generate a show function for simple field */
56#define NETDEVICE_SHOW(field, format_string) \
57static ssize_t format_##field(const struct net_device *net, char *buf) \
58{ \
59 return sprintf(buf, format_string, net->field); \
60} \
43cb76d9
GKH
61static ssize_t show_##field(struct device *dev, \
62 struct device_attribute *attr, char *buf) \
1da177e4 63{ \
43cb76d9 64 return netdev_show(dev, attr, buf, format_##field); \
1da177e4
LT
65}
66
67
68/* use same locking and permission rules as SIF* ioctl's */
43cb76d9 69static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
1da177e4
LT
70 const char *buf, size_t len,
71 int (*set)(struct net_device *, unsigned long))
72{
73 struct net_device *net = to_net_dev(dev);
74 char *endp;
75 unsigned long new;
76 int ret = -EINVAL;
77
78 if (!capable(CAP_NET_ADMIN))
79 return -EPERM;
80
81 new = simple_strtoul(buf, &endp, 0);
82 if (endp == buf)
83 goto err;
84
5a5990d3 85 if (!rtnl_trylock())
336ca57c 86 return restart_syscall();
5a5990d3 87
1da177e4
LT
88 if (dev_isalive(net)) {
89 if ((ret = (*set)(net, new)) == 0)
90 ret = len;
91 }
92 rtnl_unlock();
93 err:
94 return ret;
95}
96
9d29672c 97NETDEVICE_SHOW(dev_id, fmt_hex);
c1f79426 98NETDEVICE_SHOW(addr_assign_type, fmt_dec);
fd586bac
KS
99NETDEVICE_SHOW(addr_len, fmt_dec);
100NETDEVICE_SHOW(iflink, fmt_dec);
101NETDEVICE_SHOW(ifindex, fmt_dec);
102NETDEVICE_SHOW(features, fmt_long_hex);
103NETDEVICE_SHOW(type, fmt_dec);
b00055aa 104NETDEVICE_SHOW(link_mode, fmt_dec);
1da177e4
LT
105
106/* use same locking rules as GIFHWADDR ioctl's */
43cb76d9
GKH
107static ssize_t show_address(struct device *dev, struct device_attribute *attr,
108 char *buf)
1da177e4
LT
109{
110 struct net_device *net = to_net_dev(dev);
111 ssize_t ret = -EINVAL;
112
113 read_lock(&dev_base_lock);
114 if (dev_isalive(net))
7ffc49a6 115 ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len);
1da177e4
LT
116 read_unlock(&dev_base_lock);
117 return ret;
118}
119
43cb76d9
GKH
120static ssize_t show_broadcast(struct device *dev,
121 struct device_attribute *attr, char *buf)
1da177e4
LT
122{
123 struct net_device *net = to_net_dev(dev);
124 if (dev_isalive(net))
7ffc49a6 125 return sysfs_format_mac(buf, net->broadcast, net->addr_len);
1da177e4
LT
126 return -EINVAL;
127}
128
43cb76d9
GKH
129static ssize_t show_carrier(struct device *dev,
130 struct device_attribute *attr, char *buf)
1da177e4
LT
131{
132 struct net_device *netdev = to_net_dev(dev);
133 if (netif_running(netdev)) {
134 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
135 }
136 return -EINVAL;
137}
138
d519e17e
AG
139static ssize_t show_speed(struct device *dev,
140 struct device_attribute *attr, char *buf)
141{
142 struct net_device *netdev = to_net_dev(dev);
143 int ret = -EINVAL;
144
145 if (!rtnl_trylock())
146 return restart_syscall();
147
ac5e3af9
ED
148 if (netif_running(netdev) &&
149 netdev->ethtool_ops &&
150 netdev->ethtool_ops->get_settings) {
d519e17e
AG
151 struct ethtool_cmd cmd = { ETHTOOL_GSET };
152
153 if (!netdev->ethtool_ops->get_settings(netdev, &cmd))
154 ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd));
155 }
156 rtnl_unlock();
157 return ret;
158}
159
160static ssize_t show_duplex(struct device *dev,
161 struct device_attribute *attr, char *buf)
162{
163 struct net_device *netdev = to_net_dev(dev);
164 int ret = -EINVAL;
165
166 if (!rtnl_trylock())
167 return restart_syscall();
168
ac5e3af9
ED
169 if (netif_running(netdev) &&
170 netdev->ethtool_ops &&
171 netdev->ethtool_ops->get_settings) {
d519e17e
AG
172 struct ethtool_cmd cmd = { ETHTOOL_GSET };
173
174 if (!netdev->ethtool_ops->get_settings(netdev, &cmd))
175 ret = sprintf(buf, "%s\n", cmd.duplex ? "full" : "half");
176 }
177 rtnl_unlock();
178 return ret;
179}
180
43cb76d9
GKH
181static ssize_t show_dormant(struct device *dev,
182 struct device_attribute *attr, char *buf)
b00055aa
SR
183{
184 struct net_device *netdev = to_net_dev(dev);
185
186 if (netif_running(netdev))
187 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
188
189 return -EINVAL;
190}
191
36cbd3dc 192static const char *const operstates[] = {
b00055aa
SR
193 "unknown",
194 "notpresent", /* currently unused */
195 "down",
196 "lowerlayerdown",
197 "testing", /* currently unused */
198 "dormant",
199 "up"
200};
201
43cb76d9
GKH
202static ssize_t show_operstate(struct device *dev,
203 struct device_attribute *attr, char *buf)
b00055aa
SR
204{
205 const struct net_device *netdev = to_net_dev(dev);
206 unsigned char operstate;
207
208 read_lock(&dev_base_lock);
209 operstate = netdev->operstate;
210 if (!netif_running(netdev))
211 operstate = IF_OPER_DOWN;
212 read_unlock(&dev_base_lock);
213
e3a5cd9e 214 if (operstate >= ARRAY_SIZE(operstates))
b00055aa
SR
215 return -EINVAL; /* should not happen */
216
217 return sprintf(buf, "%s\n", operstates[operstate]);
218}
219
1da177e4
LT
220/* read-write attributes */
221NETDEVICE_SHOW(mtu, fmt_dec);
222
223static int change_mtu(struct net_device *net, unsigned long new_mtu)
224{
225 return dev_set_mtu(net, (int) new_mtu);
226}
227
43cb76d9
GKH
228static ssize_t store_mtu(struct device *dev, struct device_attribute *attr,
229 const char *buf, size_t len)
1da177e4 230{
43cb76d9 231 return netdev_store(dev, attr, buf, len, change_mtu);
1da177e4
LT
232}
233
1da177e4
LT
234NETDEVICE_SHOW(flags, fmt_hex);
235
236static int change_flags(struct net_device *net, unsigned long new_flags)
237{
238 return dev_change_flags(net, (unsigned) new_flags);
239}
240
43cb76d9
GKH
241static ssize_t store_flags(struct device *dev, struct device_attribute *attr,
242 const char *buf, size_t len)
1da177e4 243{
43cb76d9 244 return netdev_store(dev, attr, buf, len, change_flags);
1da177e4
LT
245}
246
1da177e4
LT
247NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
248
249static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
250{
251 net->tx_queue_len = new_len;
252 return 0;
253}
254
43cb76d9
GKH
255static ssize_t store_tx_queue_len(struct device *dev,
256 struct device_attribute *attr,
257 const char *buf, size_t len)
1da177e4 258{
43cb76d9 259 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
1da177e4
LT
260}
261
0b815a1a
SH
262static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,
263 const char *buf, size_t len)
264{
265 struct net_device *netdev = to_net_dev(dev);
266 size_t count = len;
267 ssize_t ret;
268
269 if (!capable(CAP_NET_ADMIN))
270 return -EPERM;
271
272 /* ignore trailing newline */
273 if (len > 0 && buf[len - 1] == '\n')
274 --count;
275
336ca57c
EB
276 if (!rtnl_trylock())
277 return restart_syscall();
0b815a1a
SH
278 ret = dev_set_alias(netdev, buf, count);
279 rtnl_unlock();
280
281 return ret < 0 ? ret : len;
282}
283
284static ssize_t show_ifalias(struct device *dev,
285 struct device_attribute *attr, char *buf)
286{
287 const struct net_device *netdev = to_net_dev(dev);
288 ssize_t ret = 0;
289
336ca57c
EB
290 if (!rtnl_trylock())
291 return restart_syscall();
0b815a1a
SH
292 if (netdev->ifalias)
293 ret = sprintf(buf, "%s\n", netdev->ifalias);
294 rtnl_unlock();
295 return ret;
296}
297
43cb76d9 298static struct device_attribute net_class_attributes[] = {
c1f79426 299 __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
fd586bac 300 __ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
9d29672c 301 __ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
0b815a1a 302 __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
fd586bac
KS
303 __ATTR(iflink, S_IRUGO, show_iflink, NULL),
304 __ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
305 __ATTR(features, S_IRUGO, show_features, NULL),
306 __ATTR(type, S_IRUGO, show_type, NULL),
b00055aa 307 __ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
fd586bac
KS
308 __ATTR(address, S_IRUGO, show_address, NULL),
309 __ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
310 __ATTR(carrier, S_IRUGO, show_carrier, NULL),
d519e17e
AG
311 __ATTR(speed, S_IRUGO, show_speed, NULL),
312 __ATTR(duplex, S_IRUGO, show_duplex, NULL),
b00055aa
SR
313 __ATTR(dormant, S_IRUGO, show_dormant, NULL),
314 __ATTR(operstate, S_IRUGO, show_operstate, NULL),
fd586bac
KS
315 __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
316 __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
317 __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
318 store_tx_queue_len),
fd586bac 319 {}
1da177e4
LT
320};
321
322/* Show a given an attribute in the statistics group */
43cb76d9
GKH
323static ssize_t netstat_show(const struct device *d,
324 struct device_attribute *attr, char *buf,
1da177e4
LT
325 unsigned long offset)
326{
43cb76d9 327 struct net_device *dev = to_net_dev(d);
1da177e4
LT
328 ssize_t ret = -EINVAL;
329
be1f3c2c
BH
330 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
331 offset % sizeof(u64) != 0);
1da177e4
LT
332
333 read_lock(&dev_base_lock);
96e74088 334 if (dev_isalive(dev)) {
28172739
ED
335 struct rtnl_link_stats64 temp;
336 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
337
be1f3c2c 338 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
96e74088 339 }
1da177e4
LT
340 read_unlock(&dev_base_lock);
341 return ret;
342}
343
344/* generate a read-only statistics attribute */
345#define NETSTAT_ENTRY(name) \
43cb76d9
GKH
346static ssize_t show_##name(struct device *d, \
347 struct device_attribute *attr, char *buf) \
1da177e4 348{ \
43cb76d9 349 return netstat_show(d, attr, buf, \
be1f3c2c 350 offsetof(struct rtnl_link_stats64, name)); \
1da177e4 351} \
43cb76d9 352static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
1da177e4
LT
353
354NETSTAT_ENTRY(rx_packets);
355NETSTAT_ENTRY(tx_packets);
356NETSTAT_ENTRY(rx_bytes);
357NETSTAT_ENTRY(tx_bytes);
358NETSTAT_ENTRY(rx_errors);
359NETSTAT_ENTRY(tx_errors);
360NETSTAT_ENTRY(rx_dropped);
361NETSTAT_ENTRY(tx_dropped);
362NETSTAT_ENTRY(multicast);
363NETSTAT_ENTRY(collisions);
364NETSTAT_ENTRY(rx_length_errors);
365NETSTAT_ENTRY(rx_over_errors);
366NETSTAT_ENTRY(rx_crc_errors);
367NETSTAT_ENTRY(rx_frame_errors);
368NETSTAT_ENTRY(rx_fifo_errors);
369NETSTAT_ENTRY(rx_missed_errors);
370NETSTAT_ENTRY(tx_aborted_errors);
371NETSTAT_ENTRY(tx_carrier_errors);
372NETSTAT_ENTRY(tx_fifo_errors);
373NETSTAT_ENTRY(tx_heartbeat_errors);
374NETSTAT_ENTRY(tx_window_errors);
375NETSTAT_ENTRY(rx_compressed);
376NETSTAT_ENTRY(tx_compressed);
377
378static struct attribute *netstat_attrs[] = {
43cb76d9
GKH
379 &dev_attr_rx_packets.attr,
380 &dev_attr_tx_packets.attr,
381 &dev_attr_rx_bytes.attr,
382 &dev_attr_tx_bytes.attr,
383 &dev_attr_rx_errors.attr,
384 &dev_attr_tx_errors.attr,
385 &dev_attr_rx_dropped.attr,
386 &dev_attr_tx_dropped.attr,
387 &dev_attr_multicast.attr,
388 &dev_attr_collisions.attr,
389 &dev_attr_rx_length_errors.attr,
390 &dev_attr_rx_over_errors.attr,
391 &dev_attr_rx_crc_errors.attr,
392 &dev_attr_rx_frame_errors.attr,
393 &dev_attr_rx_fifo_errors.attr,
394 &dev_attr_rx_missed_errors.attr,
395 &dev_attr_tx_aborted_errors.attr,
396 &dev_attr_tx_carrier_errors.attr,
397 &dev_attr_tx_fifo_errors.attr,
398 &dev_attr_tx_heartbeat_errors.attr,
399 &dev_attr_tx_window_errors.attr,
400 &dev_attr_rx_compressed.attr,
401 &dev_attr_tx_compressed.attr,
1da177e4
LT
402 NULL
403};
404
405
406static struct attribute_group netstat_group = {
407 .name = "statistics",
408 .attrs = netstat_attrs,
409};
410
22bb1be4 411#ifdef CONFIG_WIRELESS_EXT_SYSFS
1da177e4 412/* helper function that does all the locking etc for wireless stats */
43cb76d9 413static ssize_t wireless_show(struct device *d, char *buf,
1da177e4
LT
414 ssize_t (*format)(const struct iw_statistics *,
415 char *))
416{
43cb76d9 417 struct net_device *dev = to_net_dev(d);
8f1546ca 418 const struct iw_statistics *iw;
1da177e4 419 ssize_t ret = -EINVAL;
4ec93edb 420
b8afe641
EB
421 if (!rtnl_trylock())
422 return restart_syscall();
6dd214b5 423 if (dev_isalive(dev)) {
8f1546ca
JB
424 iw = get_wireless_stats(dev);
425 if (iw)
6dd214b5
AB
426 ret = (*format)(iw, buf);
427 }
a160ee69 428 rtnl_unlock();
1da177e4
LT
429
430 return ret;
431}
432
433/* show function template for wireless fields */
434#define WIRELESS_SHOW(name, field, format_string) \
435static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
436{ \
437 return sprintf(buf, format_string, iw->field); \
438} \
43cb76d9
GKH
439static ssize_t show_iw_##name(struct device *d, \
440 struct device_attribute *attr, char *buf) \
1da177e4 441{ \
43cb76d9 442 return wireless_show(d, buf, format_iw_##name); \
1da177e4 443} \
43cb76d9 444static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
1da177e4
LT
445
446WIRELESS_SHOW(status, status, fmt_hex);
447WIRELESS_SHOW(link, qual.qual, fmt_dec);
448WIRELESS_SHOW(level, qual.level, fmt_dec);
449WIRELESS_SHOW(noise, qual.noise, fmt_dec);
450WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
451WIRELESS_SHOW(crypt, discard.code, fmt_dec);
452WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
453WIRELESS_SHOW(misc, discard.misc, fmt_dec);
454WIRELESS_SHOW(retries, discard.retries, fmt_dec);
455WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
456
457static struct attribute *wireless_attrs[] = {
43cb76d9
GKH
458 &dev_attr_status.attr,
459 &dev_attr_link.attr,
460 &dev_attr_level.attr,
461 &dev_attr_noise.attr,
462 &dev_attr_nwid.attr,
463 &dev_attr_crypt.attr,
464 &dev_attr_fragment.attr,
465 &dev_attr_retries.attr,
466 &dev_attr_misc.attr,
467 &dev_attr_beacon.attr,
1da177e4
LT
468 NULL
469};
470
471static struct attribute_group wireless_group = {
472 .name = "wireless",
473 .attrs = wireless_attrs,
474};
475#endif
d6523ddf 476#endif /* CONFIG_SYSFS */
1da177e4 477
30bde1f5 478#ifdef CONFIG_RPS
0a9627f2
TH
479/*
480 * RX queue sysfs structures and functions.
481 */
482struct rx_queue_attribute {
483 struct attribute attr;
484 ssize_t (*show)(struct netdev_rx_queue *queue,
485 struct rx_queue_attribute *attr, char *buf);
486 ssize_t (*store)(struct netdev_rx_queue *queue,
487 struct rx_queue_attribute *attr, const char *buf, size_t len);
488};
489#define to_rx_queue_attr(_attr) container_of(_attr, \
490 struct rx_queue_attribute, attr)
491
492#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
493
494static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
495 char *buf)
496{
497 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
498 struct netdev_rx_queue *queue = to_rx_queue(kobj);
499
500 if (!attribute->show)
501 return -EIO;
502
503 return attribute->show(queue, attribute, buf);
504}
505
506static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
507 const char *buf, size_t count)
508{
509 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
510 struct netdev_rx_queue *queue = to_rx_queue(kobj);
511
512 if (!attribute->store)
513 return -EIO;
514
515 return attribute->store(queue, attribute, buf, count);
516}
517
fa50d645 518static const struct sysfs_ops rx_queue_sysfs_ops = {
0a9627f2
TH
519 .show = rx_queue_attr_show,
520 .store = rx_queue_attr_store,
521};
522
523static ssize_t show_rps_map(struct netdev_rx_queue *queue,
524 struct rx_queue_attribute *attribute, char *buf)
525{
526 struct rps_map *map;
527 cpumask_var_t mask;
528 size_t len = 0;
529 int i;
530
531 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
532 return -ENOMEM;
533
534 rcu_read_lock();
535 map = rcu_dereference(queue->rps_map);
536 if (map)
537 for (i = 0; i < map->len; i++)
538 cpumask_set_cpu(map->cpus[i], mask);
539
540 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
541 if (PAGE_SIZE - len < 3) {
542 rcu_read_unlock();
543 free_cpumask_var(mask);
544 return -EINVAL;
545 }
546 rcu_read_unlock();
547
548 free_cpumask_var(mask);
549 len += sprintf(buf + len, "\n");
550 return len;
551}
552
553static void rps_map_release(struct rcu_head *rcu)
554{
555 struct rps_map *map = container_of(rcu, struct rps_map, rcu);
556
557 kfree(map);
558}
559
f5acb907 560static ssize_t store_rps_map(struct netdev_rx_queue *queue,
0a9627f2
TH
561 struct rx_queue_attribute *attribute,
562 const char *buf, size_t len)
563{
564 struct rps_map *old_map, *map;
565 cpumask_var_t mask;
566 int err, cpu, i;
567 static DEFINE_SPINLOCK(rps_map_lock);
568
569 if (!capable(CAP_NET_ADMIN))
570 return -EPERM;
571
572 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
573 return -ENOMEM;
574
575 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
576 if (err) {
577 free_cpumask_var(mask);
578 return err;
579 }
580
581 map = kzalloc(max_t(unsigned,
582 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
583 GFP_KERNEL);
584 if (!map) {
585 free_cpumask_var(mask);
586 return -ENOMEM;
587 }
588
589 i = 0;
590 for_each_cpu_and(cpu, mask, cpu_online_mask)
591 map->cpus[i++] = cpu;
592
593 if (i)
594 map->len = i;
595 else {
596 kfree(map);
597 map = NULL;
598 }
599
600 spin_lock(&rps_map_lock);
6e3f7faf
ED
601 old_map = rcu_dereference_protected(queue->rps_map,
602 lockdep_is_held(&rps_map_lock));
0a9627f2
TH
603 rcu_assign_pointer(queue->rps_map, map);
604 spin_unlock(&rps_map_lock);
605
606 if (old_map)
607 call_rcu(&old_map->rcu, rps_map_release);
608
609 free_cpumask_var(mask);
610 return len;
611}
612
fec5e652
TH
613static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
614 struct rx_queue_attribute *attr,
615 char *buf)
616{
617 struct rps_dev_flow_table *flow_table;
618 unsigned int val = 0;
619
620 rcu_read_lock();
621 flow_table = rcu_dereference(queue->rps_flow_table);
622 if (flow_table)
623 val = flow_table->mask + 1;
624 rcu_read_unlock();
625
626 return sprintf(buf, "%u\n", val);
627}
628
629static void rps_dev_flow_table_release_work(struct work_struct *work)
630{
631 struct rps_dev_flow_table *table = container_of(work,
632 struct rps_dev_flow_table, free_work);
633
634 vfree(table);
635}
636
637static void rps_dev_flow_table_release(struct rcu_head *rcu)
638{
639 struct rps_dev_flow_table *table = container_of(rcu,
640 struct rps_dev_flow_table, rcu);
641
642 INIT_WORK(&table->free_work, rps_dev_flow_table_release_work);
643 schedule_work(&table->free_work);
644}
645
f5acb907 646static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
fec5e652
TH
647 struct rx_queue_attribute *attr,
648 const char *buf, size_t len)
649{
650 unsigned int count;
651 char *endp;
652 struct rps_dev_flow_table *table, *old_table;
653 static DEFINE_SPINLOCK(rps_dev_flow_lock);
654
655 if (!capable(CAP_NET_ADMIN))
656 return -EPERM;
657
658 count = simple_strtoul(buf, &endp, 0);
659 if (endp == buf)
660 return -EINVAL;
661
662 if (count) {
663 int i;
664
665 if (count > 1<<30) {
666 /* Enforce a limit to prevent overflow */
667 return -EINVAL;
668 }
669 count = roundup_pow_of_two(count);
670 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count));
671 if (!table)
672 return -ENOMEM;
673
674 table->mask = count - 1;
675 for (i = 0; i < count; i++)
676 table->flows[i].cpu = RPS_NO_CPU;
677 } else
678 table = NULL;
679
680 spin_lock(&rps_dev_flow_lock);
6e3f7faf
ED
681 old_table = rcu_dereference_protected(queue->rps_flow_table,
682 lockdep_is_held(&rps_dev_flow_lock));
fec5e652
TH
683 rcu_assign_pointer(queue->rps_flow_table, table);
684 spin_unlock(&rps_dev_flow_lock);
685
686 if (old_table)
687 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
688
689 return len;
690}
691
0a9627f2
TH
692static struct rx_queue_attribute rps_cpus_attribute =
693 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
694
fec5e652
TH
695
696static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
697 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
698 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
699
0a9627f2
TH
700static struct attribute *rx_queue_default_attrs[] = {
701 &rps_cpus_attribute.attr,
fec5e652 702 &rps_dev_flow_table_cnt_attribute.attr,
0a9627f2
TH
703 NULL
704};
705
706static void rx_queue_release(struct kobject *kobj)
707{
708 struct netdev_rx_queue *queue = to_rx_queue(kobj);
6e3f7faf
ED
709 struct rps_map *map;
710 struct rps_dev_flow_table *flow_table;
0a9627f2 711
fec5e652 712
6e3f7faf 713 map = rcu_dereference_raw(queue->rps_map);
9ea19481
JF
714 if (map) {
715 RCU_INIT_POINTER(queue->rps_map, NULL);
6e3f7faf 716 call_rcu(&map->rcu, rps_map_release);
9ea19481 717 }
6e3f7faf
ED
718
719 flow_table = rcu_dereference_raw(queue->rps_flow_table);
9ea19481
JF
720 if (flow_table) {
721 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
6e3f7faf 722 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
9ea19481 723 }
0a9627f2 724
9ea19481 725 memset(kobj, 0, sizeof(*kobj));
fe822240 726 dev_put(queue->dev);
0a9627f2
TH
727}
728
729static struct kobj_type rx_queue_ktype = {
730 .sysfs_ops = &rx_queue_sysfs_ops,
731 .release = rx_queue_release,
732 .default_attrs = rx_queue_default_attrs,
733};
734
735static int rx_queue_add_kobject(struct net_device *net, int index)
736{
737 struct netdev_rx_queue *queue = net->_rx + index;
738 struct kobject *kobj = &queue->kobj;
739 int error = 0;
740
741 kobj->kset = net->queues_kset;
742 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
743 "rx-%u", index);
744 if (error) {
745 kobject_put(kobj);
746 return error;
747 }
748
749 kobject_uevent(kobj, KOBJ_ADD);
fe822240 750 dev_hold(queue->dev);
0a9627f2
TH
751
752 return error;
753}
bf264145 754#endif /* CONFIG_RPS */
0a9627f2 755
62fe0b40
BH
756int
757net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
0a9627f2 758{
bf264145 759#ifdef CONFIG_RPS
0a9627f2
TH
760 int i;
761 int error = 0;
762
62fe0b40 763 for (i = old_num; i < new_num; i++) {
0a9627f2 764 error = rx_queue_add_kobject(net, i);
62fe0b40
BH
765 if (error) {
766 new_num = old_num;
0a9627f2 767 break;
62fe0b40 768 }
0a9627f2
TH
769 }
770
62fe0b40
BH
771 while (--i >= new_num)
772 kobject_put(&net->_rx[i].kobj);
0a9627f2
TH
773
774 return error;
bf264145
TH
775#else
776 return 0;
777#endif
0a9627f2
TH
778}
779
bf264145 780#ifdef CONFIG_XPS
1d24eb48
TH
781/*
782 * netdev_queue sysfs structures and functions.
783 */
784struct netdev_queue_attribute {
785 struct attribute attr;
786 ssize_t (*show)(struct netdev_queue *queue,
787 struct netdev_queue_attribute *attr, char *buf);
788 ssize_t (*store)(struct netdev_queue *queue,
789 struct netdev_queue_attribute *attr, const char *buf, size_t len);
790};
791#define to_netdev_queue_attr(_attr) container_of(_attr, \
792 struct netdev_queue_attribute, attr)
793
794#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
795
796static ssize_t netdev_queue_attr_show(struct kobject *kobj,
797 struct attribute *attr, char *buf)
798{
799 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
800 struct netdev_queue *queue = to_netdev_queue(kobj);
801
802 if (!attribute->show)
803 return -EIO;
804
805 return attribute->show(queue, attribute, buf);
806}
807
808static ssize_t netdev_queue_attr_store(struct kobject *kobj,
809 struct attribute *attr,
810 const char *buf, size_t count)
811{
812 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
813 struct netdev_queue *queue = to_netdev_queue(kobj);
814
815 if (!attribute->store)
816 return -EIO;
817
818 return attribute->store(queue, attribute, buf, count);
819}
820
821static const struct sysfs_ops netdev_queue_sysfs_ops = {
822 .show = netdev_queue_attr_show,
823 .store = netdev_queue_attr_store,
824};
825
826static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue)
0a9627f2 827{
1d24eb48
TH
828 struct net_device *dev = queue->dev;
829 int i;
830
831 for (i = 0; i < dev->num_tx_queues; i++)
832 if (queue == &dev->_tx[i])
833 break;
834
835 BUG_ON(i >= dev->num_tx_queues);
836
837 return i;
838}
839
840
841static ssize_t show_xps_map(struct netdev_queue *queue,
842 struct netdev_queue_attribute *attribute, char *buf)
843{
844 struct net_device *dev = queue->dev;
845 struct xps_dev_maps *dev_maps;
846 cpumask_var_t mask;
847 unsigned long index;
848 size_t len = 0;
849 int i;
850
851 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
852 return -ENOMEM;
853
854 index = get_netdev_queue_index(queue);
855
856 rcu_read_lock();
857 dev_maps = rcu_dereference(dev->xps_maps);
858 if (dev_maps) {
859 for_each_possible_cpu(i) {
860 struct xps_map *map =
861 rcu_dereference(dev_maps->cpu_map[i]);
862 if (map) {
863 int j;
864 for (j = 0; j < map->len; j++) {
865 if (map->queues[j] == index) {
866 cpumask_set_cpu(i, mask);
867 break;
868 }
869 }
870 }
871 }
872 }
873 rcu_read_unlock();
874
875 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
876 if (PAGE_SIZE - len < 3) {
877 free_cpumask_var(mask);
878 return -EINVAL;
879 }
880
881 free_cpumask_var(mask);
882 len += sprintf(buf + len, "\n");
883 return len;
884}
885
886static void xps_map_release(struct rcu_head *rcu)
887{
888 struct xps_map *map = container_of(rcu, struct xps_map, rcu);
889
890 kfree(map);
891}
892
893static void xps_dev_maps_release(struct rcu_head *rcu)
894{
895 struct xps_dev_maps *dev_maps =
896 container_of(rcu, struct xps_dev_maps, rcu);
897
898 kfree(dev_maps);
899}
900
901static DEFINE_MUTEX(xps_map_mutex);
a4177869
ED
902#define xmap_dereference(P) \
903 rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex))
1d24eb48
TH
904
905static ssize_t store_xps_map(struct netdev_queue *queue,
906 struct netdev_queue_attribute *attribute,
907 const char *buf, size_t len)
908{
909 struct net_device *dev = queue->dev;
910 cpumask_var_t mask;
911 int err, i, cpu, pos, map_len, alloc_len, need_set;
912 unsigned long index;
913 struct xps_map *map, *new_map;
914 struct xps_dev_maps *dev_maps, *new_dev_maps;
915 int nonempty = 0;
916
917 if (!capable(CAP_NET_ADMIN))
918 return -EPERM;
919
920 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
921 return -ENOMEM;
922
923 index = get_netdev_queue_index(queue);
924
925 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
926 if (err) {
927 free_cpumask_var(mask);
928 return err;
929 }
930
931 new_dev_maps = kzalloc(max_t(unsigned,
932 XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL);
933 if (!new_dev_maps) {
934 free_cpumask_var(mask);
935 return -ENOMEM;
936 }
937
938 mutex_lock(&xps_map_mutex);
939
a4177869 940 dev_maps = xmap_dereference(dev->xps_maps);
1d24eb48
TH
941
942 for_each_possible_cpu(cpu) {
a4177869
ED
943 map = dev_maps ?
944 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
945 new_map = map;
1d24eb48
TH
946 if (map) {
947 for (pos = 0; pos < map->len; pos++)
948 if (map->queues[pos] == index)
949 break;
950 map_len = map->len;
951 alloc_len = map->alloc_len;
952 } else
953 pos = map_len = alloc_len = 0;
954
955 need_set = cpu_isset(cpu, *mask) && cpu_online(cpu);
956
957 if (need_set && pos >= map_len) {
958 /* Need to add queue to this CPU's map */
959 if (map_len >= alloc_len) {
960 alloc_len = alloc_len ?
961 2 * alloc_len : XPS_MIN_MAP_ALLOC;
b02038a1
ED
962 new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len),
963 GFP_KERNEL,
964 cpu_to_node(cpu));
1d24eb48
TH
965 if (!new_map)
966 goto error;
967 new_map->alloc_len = alloc_len;
968 for (i = 0; i < map_len; i++)
969 new_map->queues[i] = map->queues[i];
970 new_map->len = map_len;
971 }
972 new_map->queues[new_map->len++] = index;
973 } else if (!need_set && pos < map_len) {
974 /* Need to remove queue from this CPU's map */
975 if (map_len > 1)
976 new_map->queues[pos] =
977 new_map->queues[--new_map->len];
978 else
979 new_map = NULL;
980 }
a4177869 981 RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map);
1d24eb48
TH
982 }
983
984 /* Cleanup old maps */
985 for_each_possible_cpu(cpu) {
a4177869
ED
986 map = dev_maps ?
987 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
988 if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map)
1d24eb48
TH
989 call_rcu(&map->rcu, xps_map_release);
990 if (new_dev_maps->cpu_map[cpu])
991 nonempty = 1;
992 }
993
994 if (nonempty)
995 rcu_assign_pointer(dev->xps_maps, new_dev_maps);
996 else {
997 kfree(new_dev_maps);
998 rcu_assign_pointer(dev->xps_maps, NULL);
999 }
1000
1001 if (dev_maps)
1002 call_rcu(&dev_maps->rcu, xps_dev_maps_release);
1003
1004 mutex_unlock(&xps_map_mutex);
1005
1006 free_cpumask_var(mask);
1007 return len;
1008
1009error:
1010 mutex_unlock(&xps_map_mutex);
1011
1012 if (new_dev_maps)
1013 for_each_possible_cpu(i)
a4177869
ED
1014 kfree(rcu_dereference_protected(
1015 new_dev_maps->cpu_map[i],
1016 1));
1d24eb48
TH
1017 kfree(new_dev_maps);
1018 free_cpumask_var(mask);
1019 return -ENOMEM;
1020}
1021
1022static struct netdev_queue_attribute xps_cpus_attribute =
1023 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
1024
1025static struct attribute *netdev_queue_default_attrs[] = {
1026 &xps_cpus_attribute.attr,
1027 NULL
1028};
1029
1030static void netdev_queue_release(struct kobject *kobj)
1031{
1032 struct netdev_queue *queue = to_netdev_queue(kobj);
1033 struct net_device *dev = queue->dev;
1034 struct xps_dev_maps *dev_maps;
1035 struct xps_map *map;
1036 unsigned long index;
1037 int i, pos, nonempty = 0;
1038
1039 index = get_netdev_queue_index(queue);
1040
1041 mutex_lock(&xps_map_mutex);
a4177869 1042 dev_maps = xmap_dereference(dev->xps_maps);
1d24eb48
TH
1043
1044 if (dev_maps) {
1045 for_each_possible_cpu(i) {
a4177869 1046 map = xmap_dereference(dev_maps->cpu_map[i]);
1d24eb48
TH
1047 if (!map)
1048 continue;
1049
1050 for (pos = 0; pos < map->len; pos++)
1051 if (map->queues[pos] == index)
1052 break;
1053
1054 if (pos < map->len) {
1055 if (map->len > 1)
1056 map->queues[pos] =
1057 map->queues[--map->len];
1058 else {
1059 RCU_INIT_POINTER(dev_maps->cpu_map[i],
1060 NULL);
1061 call_rcu(&map->rcu, xps_map_release);
1062 map = NULL;
1063 }
1064 }
1065 if (map)
1066 nonempty = 1;
1067 }
1068
1069 if (!nonempty) {
1070 RCU_INIT_POINTER(dev->xps_maps, NULL);
1071 call_rcu(&dev_maps->rcu, xps_dev_maps_release);
1072 }
1073 }
1074
1075 mutex_unlock(&xps_map_mutex);
1076
1077 memset(kobj, 0, sizeof(*kobj));
1078 dev_put(queue->dev);
1079}
1080
1081static struct kobj_type netdev_queue_ktype = {
1082 .sysfs_ops = &netdev_queue_sysfs_ops,
1083 .release = netdev_queue_release,
1084 .default_attrs = netdev_queue_default_attrs,
1085};
1086
1087static int netdev_queue_add_kobject(struct net_device *net, int index)
1088{
1089 struct netdev_queue *queue = net->_tx + index;
1090 struct kobject *kobj = &queue->kobj;
1091 int error = 0;
1092
1093 kobj->kset = net->queues_kset;
1094 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1095 "tx-%u", index);
1096 if (error) {
1097 kobject_put(kobj);
1098 return error;
1099 }
1100
1101 kobject_uevent(kobj, KOBJ_ADD);
1102 dev_hold(queue->dev);
1103
1104 return error;
1105}
bf264145 1106#endif /* CONFIG_XPS */
1d24eb48
TH
1107
1108int
1109netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
1110{
bf264145 1111#ifdef CONFIG_XPS
1d24eb48
TH
1112 int i;
1113 int error = 0;
1114
1115 for (i = old_num; i < new_num; i++) {
1116 error = netdev_queue_add_kobject(net, i);
1117 if (error) {
1118 new_num = old_num;
1119 break;
1120 }
1121 }
1122
1123 while (--i >= new_num)
1124 kobject_put(&net->_tx[i].kobj);
1125
1126 return error;
bf264145
TH
1127#else
1128 return 0;
1129#endif
1d24eb48
TH
1130}
1131
1132static int register_queue_kobjects(struct net_device *net)
1133{
bf264145 1134 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
1d24eb48 1135
bf264145 1136#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
62fe0b40
BH
1137 net->queues_kset = kset_create_and_add("queues",
1138 NULL, &net->dev.kobj);
1139 if (!net->queues_kset)
1140 return -ENOMEM;
bf264145
TH
1141#endif
1142
1143#ifdef CONFIG_RPS
1144 real_rx = net->real_num_rx_queues;
1145#endif
1146 real_tx = net->real_num_tx_queues;
1d24eb48 1147
bf264145 1148 error = net_rx_queue_update_kobjects(net, 0, real_rx);
1d24eb48
TH
1149 if (error)
1150 goto error;
bf264145 1151 rxq = real_rx;
1d24eb48 1152
bf264145 1153 error = netdev_queue_update_kobjects(net, 0, real_tx);
1d24eb48
TH
1154 if (error)
1155 goto error;
bf264145 1156 txq = real_tx;
1d24eb48
TH
1157
1158 return 0;
1159
1160error:
1161 netdev_queue_update_kobjects(net, txq, 0);
1162 net_rx_queue_update_kobjects(net, rxq, 0);
1163 return error;
62fe0b40 1164}
0a9627f2 1165
1d24eb48 1166static void remove_queue_kobjects(struct net_device *net)
62fe0b40 1167{
bf264145
TH
1168 int real_rx = 0, real_tx = 0;
1169
1170#ifdef CONFIG_RPS
1171 real_rx = net->real_num_rx_queues;
1172#endif
1173 real_tx = net->real_num_tx_queues;
1174
1175 net_rx_queue_update_kobjects(net, real_rx, 0);
1176 netdev_queue_update_kobjects(net, real_tx, 0);
1177#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
0a9627f2 1178 kset_unregister(net->queues_kset);
bf264145 1179#endif
0a9627f2 1180}
608b4b95
EB
1181
1182static const void *net_current_ns(void)
1183{
1184 return current->nsproxy->net_ns;
1185}
1186
1187static const void *net_initial_ns(void)
1188{
1189 return &init_net;
1190}
1191
1192static const void *net_netlink_ns(struct sock *sk)
1193{
1194 return sock_net(sk);
1195}
1196
04600794 1197struct kobj_ns_type_operations net_ns_type_operations = {
608b4b95
EB
1198 .type = KOBJ_NS_TYPE_NET,
1199 .current_ns = net_current_ns,
1200 .netlink_ns = net_netlink_ns,
1201 .initial_ns = net_initial_ns,
1202};
04600794 1203EXPORT_SYMBOL_GPL(net_ns_type_operations);
608b4b95
EB
1204
1205static void net_kobj_ns_exit(struct net *net)
1206{
1207 kobj_ns_exit(KOBJ_NS_TYPE_NET, net);
1208}
1209
d6523ddf 1210static struct pernet_operations kobj_net_ops = {
608b4b95
EB
1211 .exit = net_kobj_ns_exit,
1212};
1213
8b41d188 1214
1da177e4 1215#ifdef CONFIG_HOTPLUG
7eff2e7a 1216static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
1da177e4 1217{
43cb76d9 1218 struct net_device *dev = to_net_dev(d);
7eff2e7a 1219 int retval;
1da177e4 1220
312c004d 1221 /* pass interface to uevent. */
7eff2e7a 1222 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
bf62456e
ER
1223 if (retval)
1224 goto exit;
ca2f37db
JT
1225
1226 /* pass ifindex to uevent.
1227 * ifindex is useful as it won't change (interface name may change)
1228 * and is what RtNetlink uses natively. */
7eff2e7a 1229 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1da177e4 1230
bf62456e 1231exit:
bf62456e 1232 return retval;
1da177e4
LT
1233}
1234#endif
1235
1236/*
4ec93edb 1237 * netdev_release -- destroy and free a dead device.
43cb76d9 1238 * Called when last reference to device kobject is gone.
1da177e4 1239 */
43cb76d9 1240static void netdev_release(struct device *d)
1da177e4 1241{
43cb76d9 1242 struct net_device *dev = to_net_dev(d);
1da177e4
LT
1243
1244 BUG_ON(dev->reg_state != NETREG_RELEASED);
1245
0b815a1a 1246 kfree(dev->ifalias);
1da177e4
LT
1247 kfree((char *)dev - dev->padded);
1248}
1249
608b4b95
EB
1250static const void *net_namespace(struct device *d)
1251{
1252 struct net_device *dev;
1253 dev = container_of(d, struct net_device, dev);
1254 return dev_net(dev);
1255}
1256
1da177e4
LT
1257static struct class net_class = {
1258 .name = "net",
43cb76d9 1259 .dev_release = netdev_release,
8b41d188 1260#ifdef CONFIG_SYSFS
43cb76d9 1261 .dev_attrs = net_class_attributes,
8b41d188 1262#endif /* CONFIG_SYSFS */
1da177e4 1263#ifdef CONFIG_HOTPLUG
43cb76d9 1264 .dev_uevent = netdev_uevent,
1da177e4 1265#endif
608b4b95
EB
1266 .ns_type = &net_ns_type_operations,
1267 .namespace = net_namespace,
1da177e4
LT
1268};
1269
9093bbb2
SH
1270/* Delete sysfs entries but hold kobject reference until after all
1271 * netdev references are gone.
1272 */
8b41d188 1273void netdev_unregister_kobject(struct net_device * net)
1da177e4 1274{
9093bbb2
SH
1275 struct device *dev = &(net->dev);
1276
1277 kobject_get(&dev->kobj);
3891845e 1278
1d24eb48 1279 remove_queue_kobjects(net);
0a9627f2 1280
9093bbb2 1281 device_del(dev);
1da177e4
LT
1282}
1283
1284/* Create sysfs entries for network device. */
8b41d188 1285int netdev_register_kobject(struct net_device *net)
1da177e4 1286{
43cb76d9 1287 struct device *dev = &(net->dev);
a4dbd674 1288 const struct attribute_group **groups = net->sysfs_groups;
0a9627f2 1289 int error = 0;
1da177e4 1290
a1b3f594 1291 device_initialize(dev);
43cb76d9
GKH
1292 dev->class = &net_class;
1293 dev->platform_data = net;
1294 dev->groups = groups;
1da177e4 1295
a2205472 1296 dev_set_name(dev, "%s", net->name);
1da177e4 1297
8b41d188 1298#ifdef CONFIG_SYSFS
0c509a6c
EB
1299 /* Allow for a device specific group */
1300 if (*groups)
1301 groups++;
1da177e4 1302
0c509a6c 1303 *groups++ = &netstat_group;
22bb1be4 1304#ifdef CONFIG_WIRELESS_EXT_SYSFS
3d23e349 1305 if (net->ieee80211_ptr)
fe9925b5 1306 *groups++ = &wireless_group;
3d23e349
JB
1307#ifdef CONFIG_WIRELESS_EXT
1308 else if (net->wireless_handlers)
1309 *groups++ = &wireless_group;
1310#endif
1da177e4 1311#endif
8b41d188 1312#endif /* CONFIG_SYSFS */
1da177e4 1313
0a9627f2
TH
1314 error = device_add(dev);
1315 if (error)
1316 return error;
1317
1d24eb48 1318 error = register_queue_kobjects(net);
0a9627f2
TH
1319 if (error) {
1320 device_del(dev);
1321 return error;
1322 }
1323
1324 return error;
1da177e4
LT
1325}
1326
b8a9787e
JV
1327int netdev_class_create_file(struct class_attribute *class_attr)
1328{
1329 return class_create_file(&net_class, class_attr);
1330}
9e34a5b5 1331EXPORT_SYMBOL(netdev_class_create_file);
b8a9787e
JV
1332
1333void netdev_class_remove_file(struct class_attribute *class_attr)
1334{
1335 class_remove_file(&net_class, class_attr);
1336}
b8a9787e
JV
1337EXPORT_SYMBOL(netdev_class_remove_file);
1338
8b41d188 1339int netdev_kobject_init(void)
1da177e4 1340{
608b4b95 1341 kobj_ns_type_register(&net_ns_type_operations);
d6523ddf 1342 register_pernet_subsys(&kobj_net_ops);
1da177e4
LT
1343 return class_register(&net_class);
1344}
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