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12#include <linux/capability.h>
13#include <linux/kernel.h>
14#include <linux/netdevice.h>
15#include <net/switchdev.h>
16#include <linux/if_arp.h>
17#include <linux/slab.h>
18#include <linux/nsproxy.h>
19#include <net/sock.h>
20#include <net/net_namespace.h>
21#include <linux/rtnetlink.h>
22#include <linux/vmalloc.h>
23#include <linux/export.h>
24#include <linux/jiffies.h>
25#include <linux/pm_runtime.h>
26
27#include "net-sysfs.h"
28
29#ifdef CONFIG_SYSFS
30static const char fmt_hex[] = "%#x\n";
31static const char fmt_long_hex[] = "%#lx\n";
32static const char fmt_dec[] = "%d\n";
33static const char fmt_ulong[] = "%lu\n";
34static const char fmt_u64[] = "%llu\n";
35
36static inline int dev_isalive(const struct net_device *dev)
37{
38 return dev->reg_state <= NETREG_REGISTERED;
39}
40
41
42static ssize_t netdev_show(const struct device *dev,
43 struct device_attribute *attr, char *buf,
44 ssize_t (*format)(const struct net_device *, char *))
45{
46 struct net_device *net = to_net_dev(dev);
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
58#define NETDEVICE_SHOW(field, format_string) \
59static ssize_t format_##field(const struct net_device *net, char *buf) \
60{ \
61 return sprintf(buf, format_string, net->field); \
62} \
63static ssize_t field##_show(struct device *dev, \
64 struct device_attribute *attr, char *buf) \
65{ \
66 return netdev_show(dev, attr, buf, format_##field); \
67} \
68
69#define NETDEVICE_SHOW_RO(field, format_string) \
70NETDEVICE_SHOW(field, format_string); \
71static DEVICE_ATTR_RO(field)
72
73#define NETDEVICE_SHOW_RW(field, format_string) \
74NETDEVICE_SHOW(field, format_string); \
75static DEVICE_ATTR_RW(field)
76
77
78static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
79 const char *buf, size_t len,
80 int (*set)(struct net_device *, unsigned long))
81{
82 struct net_device *netdev = to_net_dev(dev);
83 struct net *net = dev_net(netdev);
84 unsigned long new;
85 int ret = -EINVAL;
86
87 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
88 return -EPERM;
89
90 ret = kstrtoul(buf, 0, &new);
91 if (ret)
92 goto err;
93
94 if (!rtnl_trylock())
95 return restart_syscall();
96
97 if (dev_isalive(netdev)) {
98 if ((ret = (*set)(netdev, new)) == 0)
99 ret = len;
100 }
101 rtnl_unlock();
102 err:
103 return ret;
104}
105
106NETDEVICE_SHOW_RO(dev_id, fmt_hex);
107NETDEVICE_SHOW_RO(dev_port, fmt_dec);
108NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
109NETDEVICE_SHOW_RO(addr_len, fmt_dec);
110NETDEVICE_SHOW_RO(ifindex, fmt_dec);
111NETDEVICE_SHOW_RO(type, fmt_dec);
112NETDEVICE_SHOW_RO(link_mode, fmt_dec);
113
114static ssize_t iflink_show(struct device *dev, struct device_attribute *attr,
115 char *buf)
116{
117 struct net_device *ndev = to_net_dev(dev);
118
119 return sprintf(buf, fmt_dec, dev_get_iflink(ndev));
120}
121static DEVICE_ATTR_RO(iflink);
122
123
124static ssize_t address_show(struct device *dev, struct device_attribute *attr,
125 char *buf)
126{
127 struct net_device *net = to_net_dev(dev);
128 ssize_t ret = -EINVAL;
129
130 read_lock(&dev_base_lock);
131 if (dev_isalive(net))
132 ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len);
133 read_unlock(&dev_base_lock);
134 return ret;
135}
136static DEVICE_ATTR_RO(address);
137
138static ssize_t broadcast_show(struct device *dev,
139 struct device_attribute *attr, char *buf)
140{
141 struct net_device *net = to_net_dev(dev);
142 if (dev_isalive(net))
143 return sysfs_format_mac(buf, net->broadcast, net->addr_len);
144 return -EINVAL;
145}
146static DEVICE_ATTR_RO(broadcast);
147
148static int change_carrier(struct net_device *net, unsigned long new_carrier)
149{
150 if (!netif_running(net))
151 return -EINVAL;
152 return dev_change_carrier(net, (bool) new_carrier);
153}
154
155static ssize_t carrier_store(struct device *dev, struct device_attribute *attr,
156 const char *buf, size_t len)
157{
158 return netdev_store(dev, attr, buf, len, change_carrier);
159}
160
161static ssize_t carrier_show(struct device *dev,
162 struct device_attribute *attr, char *buf)
163{
164 struct net_device *netdev = to_net_dev(dev);
165 if (netif_running(netdev)) {
166 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
167 }
168 return -EINVAL;
169}
170static DEVICE_ATTR_RW(carrier);
171
172static ssize_t speed_show(struct device *dev,
173 struct device_attribute *attr, char *buf)
174{
175 struct net_device *netdev = to_net_dev(dev);
176 int ret = -EINVAL;
177
178 if (!rtnl_trylock())
179 return restart_syscall();
180
181 if (netif_running(netdev)) {
182 struct ethtool_link_ksettings cmd;
183
184 if (!__ethtool_get_link_ksettings(netdev, &cmd))
185 ret = sprintf(buf, fmt_dec, cmd.base.speed);
186 }
187 rtnl_unlock();
188 return ret;
189}
190static DEVICE_ATTR_RO(speed);
191
192static ssize_t duplex_show(struct device *dev,
193 struct device_attribute *attr, char *buf)
194{
195 struct net_device *netdev = to_net_dev(dev);
196 int ret = -EINVAL;
197
198 if (!rtnl_trylock())
199 return restart_syscall();
200
201 if (netif_running(netdev)) {
202 struct ethtool_link_ksettings cmd;
203
204 if (!__ethtool_get_link_ksettings(netdev, &cmd)) {
205 const char *duplex;
206
207 switch (cmd.base.duplex) {
208 case DUPLEX_HALF:
209 duplex = "half";
210 break;
211 case DUPLEX_FULL:
212 duplex = "full";
213 break;
214 default:
215 duplex = "unknown";
216 break;
217 }
218 ret = sprintf(buf, "%s\n", duplex);
219 }
220 }
221 rtnl_unlock();
222 return ret;
223}
224static DEVICE_ATTR_RO(duplex);
225
226static ssize_t dormant_show(struct device *dev,
227 struct device_attribute *attr, char *buf)
228{
229 struct net_device *netdev = to_net_dev(dev);
230
231 if (netif_running(netdev))
232 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
233
234 return -EINVAL;
235}
236static DEVICE_ATTR_RO(dormant);
237
238static const char *const operstates[] = {
239 "unknown",
240 "notpresent",
241 "down",
242 "lowerlayerdown",
243 "testing",
244 "dormant",
245 "up"
246};
247
248static ssize_t operstate_show(struct device *dev,
249 struct device_attribute *attr, char *buf)
250{
251 const struct net_device *netdev = to_net_dev(dev);
252 unsigned char operstate;
253
254 read_lock(&dev_base_lock);
255 operstate = netdev->operstate;
256 if (!netif_running(netdev))
257 operstate = IF_OPER_DOWN;
258 read_unlock(&dev_base_lock);
259
260 if (operstate >= ARRAY_SIZE(operstates))
261 return -EINVAL;
262
263 return sprintf(buf, "%s\n", operstates[operstate]);
264}
265static DEVICE_ATTR_RO(operstate);
266
267static ssize_t carrier_changes_show(struct device *dev,
268 struct device_attribute *attr,
269 char *buf)
270{
271 struct net_device *netdev = to_net_dev(dev);
272 return sprintf(buf, fmt_dec,
273 atomic_read(&netdev->carrier_changes));
274}
275static DEVICE_ATTR_RO(carrier_changes);
276
277
278
279static int change_mtu(struct net_device *net, unsigned long new_mtu)
280{
281 return dev_set_mtu(net, (int) new_mtu);
282}
283
284static ssize_t mtu_store(struct device *dev, struct device_attribute *attr,
285 const char *buf, size_t len)
286{
287 return netdev_store(dev, attr, buf, len, change_mtu);
288}
289NETDEVICE_SHOW_RW(mtu, fmt_dec);
290
291static int change_flags(struct net_device *net, unsigned long new_flags)
292{
293 return dev_change_flags(net, (unsigned int) new_flags);
294}
295
296static ssize_t flags_store(struct device *dev, struct device_attribute *attr,
297 const char *buf, size_t len)
298{
299 return netdev_store(dev, attr, buf, len, change_flags);
300}
301NETDEVICE_SHOW_RW(flags, fmt_hex);
302
303static int change_tx_queue_len(struct net_device *dev, unsigned long new_len)
304{
305 int res, orig_len = dev->tx_queue_len;
306
307 if (new_len != orig_len) {
308 dev->tx_queue_len = new_len;
309 res = call_netdevice_notifiers(NETDEV_CHANGE_TX_QUEUE_LEN, dev);
310 res = notifier_to_errno(res);
311 if (res) {
312 netdev_err(dev,
313 "refused to change device tx_queue_len\n");
314 dev->tx_queue_len = orig_len;
315 return -EFAULT;
316 }
317 }
318
319 return 0;
320}
321
322static ssize_t tx_queue_len_store(struct device *dev,
323 struct device_attribute *attr,
324 const char *buf, size_t len)
325{
326 if (!capable(CAP_NET_ADMIN))
327 return -EPERM;
328
329 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
330}
331NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong);
332
333static int change_gro_flush_timeout(struct net_device *dev, unsigned long val)
334{
335 dev->gro_flush_timeout = val;
336 return 0;
337}
338
339static ssize_t gro_flush_timeout_store(struct device *dev,
340 struct device_attribute *attr,
341 const char *buf, size_t len)
342{
343 if (!capable(CAP_NET_ADMIN))
344 return -EPERM;
345
346 return netdev_store(dev, attr, buf, len, change_gro_flush_timeout);
347}
348NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong);
349
350static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr,
351 const char *buf, size_t len)
352{
353 struct net_device *netdev = to_net_dev(dev);
354 struct net *net = dev_net(netdev);
355 size_t count = len;
356 ssize_t ret;
357
358 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
359 return -EPERM;
360
361
362 if (len > 0 && buf[len - 1] == '\n')
363 --count;
364
365 if (!rtnl_trylock())
366 return restart_syscall();
367 ret = dev_set_alias(netdev, buf, count);
368 rtnl_unlock();
369
370 return ret < 0 ? ret : len;
371}
372
373static ssize_t ifalias_show(struct device *dev,
374 struct device_attribute *attr, char *buf)
375{
376 const struct net_device *netdev = to_net_dev(dev);
377 ssize_t ret = 0;
378
379 if (!rtnl_trylock())
380 return restart_syscall();
381 if (netdev->ifalias)
382 ret = sprintf(buf, "%s\n", netdev->ifalias);
383 rtnl_unlock();
384 return ret;
385}
386static DEVICE_ATTR_RW(ifalias);
387
388static int change_group(struct net_device *net, unsigned long new_group)
389{
390 dev_set_group(net, (int) new_group);
391 return 0;
392}
393
394static ssize_t group_store(struct device *dev, struct device_attribute *attr,
395 const char *buf, size_t len)
396{
397 return netdev_store(dev, attr, buf, len, change_group);
398}
399NETDEVICE_SHOW(group, fmt_dec);
400static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store);
401
402static int change_proto_down(struct net_device *dev, unsigned long proto_down)
403{
404 return dev_change_proto_down(dev, (bool) proto_down);
405}
406
407static ssize_t proto_down_store(struct device *dev,
408 struct device_attribute *attr,
409 const char *buf, size_t len)
410{
411 return netdev_store(dev, attr, buf, len, change_proto_down);
412}
413NETDEVICE_SHOW_RW(proto_down, fmt_dec);
414
415static ssize_t phys_port_id_show(struct device *dev,
416 struct device_attribute *attr, char *buf)
417{
418 struct net_device *netdev = to_net_dev(dev);
419 ssize_t ret = -EINVAL;
420
421 if (!rtnl_trylock())
422 return restart_syscall();
423
424 if (dev_isalive(netdev)) {
425 struct netdev_phys_item_id ppid;
426
427 ret = dev_get_phys_port_id(netdev, &ppid);
428 if (!ret)
429 ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
430 }
431 rtnl_unlock();
432
433 return ret;
434}
435static DEVICE_ATTR_RO(phys_port_id);
436
437static ssize_t phys_port_name_show(struct device *dev,
438 struct device_attribute *attr, char *buf)
439{
440 struct net_device *netdev = to_net_dev(dev);
441 ssize_t ret = -EINVAL;
442
443 if (!rtnl_trylock())
444 return restart_syscall();
445
446 if (dev_isalive(netdev)) {
447 char name[IFNAMSIZ];
448
449 ret = dev_get_phys_port_name(netdev, name, sizeof(name));
450 if (!ret)
451 ret = sprintf(buf, "%s\n", name);
452 }
453 rtnl_unlock();
454
455 return ret;
456}
457static DEVICE_ATTR_RO(phys_port_name);
458
459static ssize_t phys_switch_id_show(struct device *dev,
460 struct device_attribute *attr, char *buf)
461{
462 struct net_device *netdev = to_net_dev(dev);
463 ssize_t ret = -EINVAL;
464
465 if (!rtnl_trylock())
466 return restart_syscall();
467
468 if (dev_isalive(netdev)) {
469 struct switchdev_attr attr = {
470 .orig_dev = netdev,
471 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
472 .flags = SWITCHDEV_F_NO_RECURSE,
473 };
474
475 ret = switchdev_port_attr_get(netdev, &attr);
476 if (!ret)
477 ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len,
478 attr.u.ppid.id);
479 }
480 rtnl_unlock();
481
482 return ret;
483}
484static DEVICE_ATTR_RO(phys_switch_id);
485
486static struct attribute *net_class_attrs[] = {
487 &dev_attr_netdev_group.attr,
488 &dev_attr_type.attr,
489 &dev_attr_dev_id.attr,
490 &dev_attr_dev_port.attr,
491 &dev_attr_iflink.attr,
492 &dev_attr_ifindex.attr,
493 &dev_attr_addr_assign_type.attr,
494 &dev_attr_addr_len.attr,
495 &dev_attr_link_mode.attr,
496 &dev_attr_address.attr,
497 &dev_attr_broadcast.attr,
498 &dev_attr_speed.attr,
499 &dev_attr_duplex.attr,
500 &dev_attr_dormant.attr,
501 &dev_attr_operstate.attr,
502 &dev_attr_carrier_changes.attr,
503 &dev_attr_ifalias.attr,
504 &dev_attr_carrier.attr,
505 &dev_attr_mtu.attr,
506 &dev_attr_flags.attr,
507 &dev_attr_tx_queue_len.attr,
508 &dev_attr_gro_flush_timeout.attr,
509 &dev_attr_phys_port_id.attr,
510 &dev_attr_phys_port_name.attr,
511 &dev_attr_phys_switch_id.attr,
512 &dev_attr_proto_down.attr,
513 NULL,
514};
515ATTRIBUTE_GROUPS(net_class);
516
517
518static ssize_t netstat_show(const struct device *d,
519 struct device_attribute *attr, char *buf,
520 unsigned long offset)
521{
522 struct net_device *dev = to_net_dev(d);
523 ssize_t ret = -EINVAL;
524
525 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
526 offset % sizeof(u64) != 0);
527
528 read_lock(&dev_base_lock);
529 if (dev_isalive(dev)) {
530 struct rtnl_link_stats64 temp;
531 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
532
533 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
534 }
535 read_unlock(&dev_base_lock);
536 return ret;
537}
538
539
540#define NETSTAT_ENTRY(name) \
541static ssize_t name##_show(struct device *d, \
542 struct device_attribute *attr, char *buf) \
543{ \
544 return netstat_show(d, attr, buf, \
545 offsetof(struct rtnl_link_stats64, name)); \
546} \
547static DEVICE_ATTR_RO(name)
548
549NETSTAT_ENTRY(rx_packets);
550NETSTAT_ENTRY(tx_packets);
551NETSTAT_ENTRY(rx_bytes);
552NETSTAT_ENTRY(tx_bytes);
553NETSTAT_ENTRY(rx_errors);
554NETSTAT_ENTRY(tx_errors);
555NETSTAT_ENTRY(rx_dropped);
556NETSTAT_ENTRY(tx_dropped);
557NETSTAT_ENTRY(multicast);
558NETSTAT_ENTRY(collisions);
559NETSTAT_ENTRY(rx_length_errors);
560NETSTAT_ENTRY(rx_over_errors);
561NETSTAT_ENTRY(rx_crc_errors);
562NETSTAT_ENTRY(rx_frame_errors);
563NETSTAT_ENTRY(rx_fifo_errors);
564NETSTAT_ENTRY(rx_missed_errors);
565NETSTAT_ENTRY(tx_aborted_errors);
566NETSTAT_ENTRY(tx_carrier_errors);
567NETSTAT_ENTRY(tx_fifo_errors);
568NETSTAT_ENTRY(tx_heartbeat_errors);
569NETSTAT_ENTRY(tx_window_errors);
570NETSTAT_ENTRY(rx_compressed);
571NETSTAT_ENTRY(tx_compressed);
572NETSTAT_ENTRY(rx_nohandler);
573
574static struct attribute *netstat_attrs[] = {
575 &dev_attr_rx_packets.attr,
576 &dev_attr_tx_packets.attr,
577 &dev_attr_rx_bytes.attr,
578 &dev_attr_tx_bytes.attr,
579 &dev_attr_rx_errors.attr,
580 &dev_attr_tx_errors.attr,
581 &dev_attr_rx_dropped.attr,
582 &dev_attr_tx_dropped.attr,
583 &dev_attr_multicast.attr,
584 &dev_attr_collisions.attr,
585 &dev_attr_rx_length_errors.attr,
586 &dev_attr_rx_over_errors.attr,
587 &dev_attr_rx_crc_errors.attr,
588 &dev_attr_rx_frame_errors.attr,
589 &dev_attr_rx_fifo_errors.attr,
590 &dev_attr_rx_missed_errors.attr,
591 &dev_attr_tx_aborted_errors.attr,
592 &dev_attr_tx_carrier_errors.attr,
593 &dev_attr_tx_fifo_errors.attr,
594 &dev_attr_tx_heartbeat_errors.attr,
595 &dev_attr_tx_window_errors.attr,
596 &dev_attr_rx_compressed.attr,
597 &dev_attr_tx_compressed.attr,
598 &dev_attr_rx_nohandler.attr,
599 NULL
600};
601
602
603static struct attribute_group netstat_group = {
604 .name = "statistics",
605 .attrs = netstat_attrs,
606};
607
608#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
609static struct attribute *wireless_attrs[] = {
610 NULL
611};
612
613static struct attribute_group wireless_group = {
614 .name = "wireless",
615 .attrs = wireless_attrs,
616};
617#endif
618
619#else
620#define net_class_groups NULL
621#endif
622
623#ifdef CONFIG_RPS
624
625
626
627struct rx_queue_attribute {
628 struct attribute attr;
629 ssize_t (*show)(struct netdev_rx_queue *queue,
630 struct rx_queue_attribute *attr, char *buf);
631 ssize_t (*store)(struct netdev_rx_queue *queue,
632 struct rx_queue_attribute *attr, const char *buf, size_t len);
633};
634#define to_rx_queue_attr(_attr) container_of(_attr, \
635 struct rx_queue_attribute, attr)
636
637#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
638
639static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
640 char *buf)
641{
642 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
643 struct netdev_rx_queue *queue = to_rx_queue(kobj);
644
645 if (!attribute->show)
646 return -EIO;
647
648 return attribute->show(queue, attribute, buf);
649}
650
651static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
652 const char *buf, size_t count)
653{
654 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
655 struct netdev_rx_queue *queue = to_rx_queue(kobj);
656
657 if (!attribute->store)
658 return -EIO;
659
660 return attribute->store(queue, attribute, buf, count);
661}
662
663static const struct sysfs_ops rx_queue_sysfs_ops = {
664 .show = rx_queue_attr_show,
665 .store = rx_queue_attr_store,
666};
667
668static ssize_t show_rps_map(struct netdev_rx_queue *queue,
669 struct rx_queue_attribute *attribute, char *buf)
670{
671 struct rps_map *map;
672 cpumask_var_t mask;
673 int i, len;
674
675 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
676 return -ENOMEM;
677
678 rcu_read_lock();
679 map = rcu_dereference(queue->rps_map);
680 if (map)
681 for (i = 0; i < map->len; i++)
682 cpumask_set_cpu(map->cpus[i], mask);
683
684 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
685 rcu_read_unlock();
686 free_cpumask_var(mask);
687
688 return len < PAGE_SIZE ? len : -EINVAL;
689}
690
691static ssize_t store_rps_map(struct netdev_rx_queue *queue,
692 struct rx_queue_attribute *attribute,
693 const char *buf, size_t len)
694{
695 struct rps_map *old_map, *map;
696 cpumask_var_t mask;
697 int err, cpu, i;
698 static DEFINE_SPINLOCK(rps_map_lock);
699
700 if (!capable(CAP_NET_ADMIN))
701 return -EPERM;
702
703 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
704 return -ENOMEM;
705
706 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
707 if (err) {
708 free_cpumask_var(mask);
709 return err;
710 }
711
712 map = kzalloc(max_t(unsigned int,
713 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
714 GFP_KERNEL);
715 if (!map) {
716 free_cpumask_var(mask);
717 return -ENOMEM;
718 }
719
720 i = 0;
721 for_each_cpu_and(cpu, mask, cpu_online_mask)
722 map->cpus[i++] = cpu;
723
724 if (i)
725 map->len = i;
726 else {
727 kfree(map);
728 map = NULL;
729 }
730
731 spin_lock(&rps_map_lock);
732 old_map = rcu_dereference_protected(queue->rps_map,
733 lockdep_is_held(&rps_map_lock));
734 rcu_assign_pointer(queue->rps_map, map);
735 spin_unlock(&rps_map_lock);
736
737 if (map)
738 static_key_slow_inc(&rps_needed);
739 if (old_map) {
740 kfree_rcu(old_map, rcu);
741 static_key_slow_dec(&rps_needed);
742 }
743 free_cpumask_var(mask);
744 return len;
745}
746
747static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
748 struct rx_queue_attribute *attr,
749 char *buf)
750{
751 struct rps_dev_flow_table *flow_table;
752 unsigned long val = 0;
753
754 rcu_read_lock();
755 flow_table = rcu_dereference(queue->rps_flow_table);
756 if (flow_table)
757 val = (unsigned long)flow_table->mask + 1;
758 rcu_read_unlock();
759
760 return sprintf(buf, "%lu\n", val);
761}
762
763static void rps_dev_flow_table_release(struct rcu_head *rcu)
764{
765 struct rps_dev_flow_table *table = container_of(rcu,
766 struct rps_dev_flow_table, rcu);
767 vfree(table);
768}
769
770static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
771 struct rx_queue_attribute *attr,
772 const char *buf, size_t len)
773{
774 unsigned long mask, count;
775 struct rps_dev_flow_table *table, *old_table;
776 static DEFINE_SPINLOCK(rps_dev_flow_lock);
777 int rc;
778
779 if (!capable(CAP_NET_ADMIN))
780 return -EPERM;
781
782 rc = kstrtoul(buf, 0, &count);
783 if (rc < 0)
784 return rc;
785
786 if (count) {
787 mask = count - 1;
788
789
790
791 while ((mask | (mask >> 1)) != mask)
792 mask |= (mask >> 1);
793
794
795
796
797#if BITS_PER_LONG > 32
798 if (mask > (unsigned long)(u32)mask)
799 return -EINVAL;
800#else
801 if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1))
802 / sizeof(struct rps_dev_flow)) {
803
804 return -EINVAL;
805 }
806#endif
807 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1));
808 if (!table)
809 return -ENOMEM;
810
811 table->mask = mask;
812 for (count = 0; count <= mask; count++)
813 table->flows[count].cpu = RPS_NO_CPU;
814 } else
815 table = NULL;
816
817 spin_lock(&rps_dev_flow_lock);
818 old_table = rcu_dereference_protected(queue->rps_flow_table,
819 lockdep_is_held(&rps_dev_flow_lock));
820 rcu_assign_pointer(queue->rps_flow_table, table);
821 spin_unlock(&rps_dev_flow_lock);
822
823 if (old_table)
824 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
825
826 return len;
827}
828
829static struct rx_queue_attribute rps_cpus_attribute =
830 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
831
832
833static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
834 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
835 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
836
837static struct attribute *rx_queue_default_attrs[] = {
838 &rps_cpus_attribute.attr,
839 &rps_dev_flow_table_cnt_attribute.attr,
840 NULL
841};
842
843static void rx_queue_release(struct kobject *kobj)
844{
845 struct netdev_rx_queue *queue = to_rx_queue(kobj);
846 struct rps_map *map;
847 struct rps_dev_flow_table *flow_table;
848
849
850 map = rcu_dereference_protected(queue->rps_map, 1);
851 if (map) {
852 RCU_INIT_POINTER(queue->rps_map, NULL);
853 kfree_rcu(map, rcu);
854 }
855
856 flow_table = rcu_dereference_protected(queue->rps_flow_table, 1);
857 if (flow_table) {
858 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
859 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
860 }
861
862 memset(kobj, 0, sizeof(*kobj));
863 dev_put(queue->dev);
864}
865
866static const void *rx_queue_namespace(struct kobject *kobj)
867{
868 struct netdev_rx_queue *queue = to_rx_queue(kobj);
869 struct device *dev = &queue->dev->dev;
870 const void *ns = NULL;
871
872 if (dev->class && dev->class->ns_type)
873 ns = dev->class->namespace(dev);
874
875 return ns;
876}
877
878static struct kobj_type rx_queue_ktype = {
879 .sysfs_ops = &rx_queue_sysfs_ops,
880 .release = rx_queue_release,
881 .default_attrs = rx_queue_default_attrs,
882 .namespace = rx_queue_namespace
883};
884
885static int rx_queue_add_kobject(struct net_device *net, int index)
886{
887 struct netdev_rx_queue *queue = net->_rx + index;
888 struct kobject *kobj = &queue->kobj;
889 int error = 0;
890
891 kobj->kset = net->queues_kset;
892 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
893 "rx-%u", index);
894 if (error) {
895 kobject_put(kobj);
896 return error;
897 }
898
899 kobject_uevent(kobj, KOBJ_ADD);
900 dev_hold(queue->dev);
901
902 return error;
903}
904#endif
905
906int
907net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
908{
909#ifdef CONFIG_RPS
910 int i;
911 int error = 0;
912
913 for (i = old_num; i < new_num; i++) {
914 error = rx_queue_add_kobject(net, i);
915 if (error) {
916 new_num = old_num;
917 break;
918 }
919 }
920
921 while (--i >= new_num)
922 kobject_put(&net->_rx[i].kobj);
923
924 return error;
925#else
926 return 0;
927#endif
928}
929
930#ifdef CONFIG_SYSFS
931
932
933
934struct netdev_queue_attribute {
935 struct attribute attr;
936 ssize_t (*show)(struct netdev_queue *queue,
937 struct netdev_queue_attribute *attr, char *buf);
938 ssize_t (*store)(struct netdev_queue *queue,
939 struct netdev_queue_attribute *attr, const char *buf, size_t len);
940};
941#define to_netdev_queue_attr(_attr) container_of(_attr, \
942 struct netdev_queue_attribute, attr)
943
944#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
945
946static ssize_t netdev_queue_attr_show(struct kobject *kobj,
947 struct attribute *attr, char *buf)
948{
949 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
950 struct netdev_queue *queue = to_netdev_queue(kobj);
951
952 if (!attribute->show)
953 return -EIO;
954
955 return attribute->show(queue, attribute, buf);
956}
957
958static ssize_t netdev_queue_attr_store(struct kobject *kobj,
959 struct attribute *attr,
960 const char *buf, size_t count)
961{
962 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
963 struct netdev_queue *queue = to_netdev_queue(kobj);
964
965 if (!attribute->store)
966 return -EIO;
967
968 return attribute->store(queue, attribute, buf, count);
969}
970
971static const struct sysfs_ops netdev_queue_sysfs_ops = {
972 .show = netdev_queue_attr_show,
973 .store = netdev_queue_attr_store,
974};
975
976static ssize_t show_trans_timeout(struct netdev_queue *queue,
977 struct netdev_queue_attribute *attribute,
978 char *buf)
979{
980 unsigned long trans_timeout;
981
982 spin_lock_irq(&queue->_xmit_lock);
983 trans_timeout = queue->trans_timeout;
984 spin_unlock_irq(&queue->_xmit_lock);
985
986 return sprintf(buf, "%lu", trans_timeout);
987}
988
989static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
990{
991 struct net_device *dev = queue->dev;
992 unsigned int i;
993
994 i = queue - dev->_tx;
995 BUG_ON(i >= dev->num_tx_queues);
996
997 return i;
998}
999
1000static ssize_t show_traffic_class(struct netdev_queue *queue,
1001 struct netdev_queue_attribute *attribute,
1002 char *buf)
1003{
1004 struct net_device *dev = queue->dev;
1005 int index = get_netdev_queue_index(queue);
1006 int tc = netdev_txq_to_tc(dev, index);
1007
1008 if (tc < 0)
1009 return -EINVAL;
1010
1011 return sprintf(buf, "%u\n", tc);
1012}
1013
1014#ifdef CONFIG_XPS
1015static ssize_t show_tx_maxrate(struct netdev_queue *queue,
1016 struct netdev_queue_attribute *attribute,
1017 char *buf)
1018{
1019 return sprintf(buf, "%lu\n", queue->tx_maxrate);
1020}
1021
1022static ssize_t set_tx_maxrate(struct netdev_queue *queue,
1023 struct netdev_queue_attribute *attribute,
1024 const char *buf, size_t len)
1025{
1026 struct net_device *dev = queue->dev;
1027 int err, index = get_netdev_queue_index(queue);
1028 u32 rate = 0;
1029
1030 err = kstrtou32(buf, 10, &rate);
1031 if (err < 0)
1032 return err;
1033
1034 if (!rtnl_trylock())
1035 return restart_syscall();
1036
1037 err = -EOPNOTSUPP;
1038 if (get_ndo_ext(dev->netdev_ops, ndo_set_tx_maxrate))
1039 err = get_ndo_ext(dev->netdev_ops, ndo_set_tx_maxrate)(dev, index, rate);
1040
1041 rtnl_unlock();
1042 if (!err) {
1043 queue->tx_maxrate = rate;
1044 return len;
1045 }
1046 return err;
1047}
1048
1049static struct netdev_queue_attribute queue_tx_maxrate =
1050 __ATTR(tx_maxrate, S_IRUGO | S_IWUSR,
1051 show_tx_maxrate, set_tx_maxrate);
1052#endif
1053
1054static struct netdev_queue_attribute queue_trans_timeout =
1055 __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL);
1056
1057static struct netdev_queue_attribute queue_traffic_class =
1058 __ATTR(traffic_class, S_IRUGO, show_traffic_class, NULL);
1059
1060#ifdef CONFIG_BQL
1061
1062
1063
1064static ssize_t bql_show(char *buf, unsigned int value)
1065{
1066 return sprintf(buf, "%u\n", value);
1067}
1068
1069static ssize_t bql_set(const char *buf, const size_t count,
1070 unsigned int *pvalue)
1071{
1072 unsigned int value;
1073 int err;
1074
1075 if (!strcmp(buf, "max") || !strcmp(buf, "max\n"))
1076 value = DQL_MAX_LIMIT;
1077 else {
1078 err = kstrtouint(buf, 10, &value);
1079 if (err < 0)
1080 return err;
1081 if (value > DQL_MAX_LIMIT)
1082 return -EINVAL;
1083 }
1084
1085 *pvalue = value;
1086
1087 return count;
1088}
1089
1090static ssize_t bql_show_hold_time(struct netdev_queue *queue,
1091 struct netdev_queue_attribute *attr,
1092 char *buf)
1093{
1094 struct dql *dql = &queue->dql;
1095
1096 return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time));
1097}
1098
1099static ssize_t bql_set_hold_time(struct netdev_queue *queue,
1100 struct netdev_queue_attribute *attribute,
1101 const char *buf, size_t len)
1102{
1103 struct dql *dql = &queue->dql;
1104 unsigned int value;
1105 int err;
1106
1107 err = kstrtouint(buf, 10, &value);
1108 if (err < 0)
1109 return err;
1110
1111 dql->slack_hold_time = msecs_to_jiffies(value);
1112
1113 return len;
1114}
1115
1116static struct netdev_queue_attribute bql_hold_time_attribute =
1117 __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time,
1118 bql_set_hold_time);
1119
1120static ssize_t bql_show_inflight(struct netdev_queue *queue,
1121 struct netdev_queue_attribute *attr,
1122 char *buf)
1123{
1124 struct dql *dql = &queue->dql;
1125
1126 return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed);
1127}
1128
1129static struct netdev_queue_attribute bql_inflight_attribute =
1130 __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL);
1131
1132#define BQL_ATTR(NAME, FIELD) \
1133static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \
1134 struct netdev_queue_attribute *attr, \
1135 char *buf) \
1136{ \
1137 return bql_show(buf, queue->dql.FIELD); \
1138} \
1139 \
1140static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \
1141 struct netdev_queue_attribute *attr, \
1142 const char *buf, size_t len) \
1143{ \
1144 return bql_set(buf, len, &queue->dql.FIELD); \
1145} \
1146 \
1147static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \
1148 __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \
1149 bql_set_ ## NAME);
1150
1151BQL_ATTR(limit, limit)
1152BQL_ATTR(limit_max, max_limit)
1153BQL_ATTR(limit_min, min_limit)
1154
1155static struct attribute *dql_attrs[] = {
1156 &bql_limit_attribute.attr,
1157 &bql_limit_max_attribute.attr,
1158 &bql_limit_min_attribute.attr,
1159 &bql_hold_time_attribute.attr,
1160 &bql_inflight_attribute.attr,
1161 NULL
1162};
1163
1164static struct attribute_group dql_group = {
1165 .name = "byte_queue_limits",
1166 .attrs = dql_attrs,
1167};
1168#endif
1169
1170#ifdef CONFIG_XPS
1171static ssize_t show_xps_map(struct netdev_queue *queue,
1172 struct netdev_queue_attribute *attribute, char *buf)
1173{
1174 struct net_device *dev = queue->dev;
1175 int cpu, len, num_tc = 1, tc = 0;
1176 struct xps_dev_maps *dev_maps;
1177 cpumask_var_t mask;
1178 unsigned long index;
1179
1180 index = get_netdev_queue_index(queue);
1181
1182 if (dev->num_tc) {
1183 num_tc = dev->num_tc;
1184 tc = netdev_txq_to_tc(dev, index);
1185 if (tc < 0)
1186 return -EINVAL;
1187 }
1188
1189 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
1190 return -ENOMEM;
1191
1192 rcu_read_lock();
1193 dev_maps = rcu_dereference(dev->xps_maps);
1194 if (dev_maps) {
1195 for_each_possible_cpu(cpu) {
1196 int i, tci = cpu * num_tc + tc;
1197 struct xps_map *map;
1198
1199 map = rcu_dereference(dev_maps->cpu_map[tci]);
1200 if (!map)
1201 continue;
1202
1203 for (i = map->len; i--;) {
1204 if (map->queues[i] == index) {
1205 cpumask_set_cpu(cpu, mask);
1206 break;
1207 }
1208 }
1209 }
1210 }
1211 rcu_read_unlock();
1212
1213 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
1214 free_cpumask_var(mask);
1215 return len < PAGE_SIZE ? len : -EINVAL;
1216}
1217
1218static ssize_t store_xps_map(struct netdev_queue *queue,
1219 struct netdev_queue_attribute *attribute,
1220 const char *buf, size_t len)
1221{
1222 struct net_device *dev = queue->dev;
1223 unsigned long index;
1224 cpumask_var_t mask;
1225 int err;
1226
1227 if (!capable(CAP_NET_ADMIN))
1228 return -EPERM;
1229
1230 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
1231 return -ENOMEM;
1232
1233 index = get_netdev_queue_index(queue);
1234
1235 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
1236 if (err) {
1237 free_cpumask_var(mask);
1238 return err;
1239 }
1240
1241 err = netif_set_xps_queue(dev, mask, index);
1242
1243 free_cpumask_var(mask);
1244
1245 return err ? : len;
1246}
1247
1248static struct netdev_queue_attribute xps_cpus_attribute =
1249 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
1250#endif
1251
1252static struct attribute *netdev_queue_default_attrs[] = {
1253 &queue_trans_timeout.attr,
1254 &queue_traffic_class.attr,
1255#ifdef CONFIG_XPS
1256 &xps_cpus_attribute.attr,
1257 &queue_tx_maxrate.attr,
1258#endif
1259 NULL
1260};
1261
1262static void netdev_queue_release(struct kobject *kobj)
1263{
1264 struct netdev_queue *queue = to_netdev_queue(kobj);
1265
1266 memset(kobj, 0, sizeof(*kobj));
1267 dev_put(queue->dev);
1268}
1269
1270static const void *netdev_queue_namespace(struct kobject *kobj)
1271{
1272 struct netdev_queue *queue = to_netdev_queue(kobj);
1273 struct device *dev = &queue->dev->dev;
1274 const void *ns = NULL;
1275
1276 if (dev->class && dev->class->ns_type)
1277 ns = dev->class->namespace(dev);
1278
1279 return ns;
1280}
1281
1282static struct kobj_type netdev_queue_ktype = {
1283 .sysfs_ops = &netdev_queue_sysfs_ops,
1284 .release = netdev_queue_release,
1285 .default_attrs = netdev_queue_default_attrs,
1286 .namespace = netdev_queue_namespace,
1287};
1288
1289static int netdev_queue_add_kobject(struct net_device *net, int index)
1290{
1291 struct netdev_queue *queue = net->_tx + index;
1292 struct kobject *kobj = &queue->kobj;
1293 int error = 0;
1294
1295 kobj->kset = net->queues_kset;
1296 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1297 "tx-%u", index);
1298 if (error)
1299 goto exit;
1300
1301#ifdef CONFIG_BQL
1302 error = sysfs_create_group(kobj, &dql_group);
1303 if (error)
1304 goto exit;
1305#endif
1306
1307 kobject_uevent(kobj, KOBJ_ADD);
1308 dev_hold(queue->dev);
1309
1310 return 0;
1311exit:
1312 kobject_put(kobj);
1313 return error;
1314}
1315#endif
1316
1317int
1318netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
1319{
1320#ifdef CONFIG_SYSFS
1321 int i;
1322 int error = 0;
1323
1324 for (i = old_num; i < new_num; i++) {
1325 error = netdev_queue_add_kobject(net, i);
1326 if (error) {
1327 new_num = old_num;
1328 break;
1329 }
1330 }
1331
1332 while (--i >= new_num) {
1333 struct netdev_queue *queue = net->_tx + i;
1334
1335#ifdef CONFIG_BQL
1336 sysfs_remove_group(&queue->kobj, &dql_group);
1337#endif
1338 kobject_put(&queue->kobj);
1339 }
1340
1341 return error;
1342#else
1343 return 0;
1344#endif
1345}
1346
1347static int register_queue_kobjects(struct net_device *net)
1348{
1349 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
1350
1351#ifdef CONFIG_SYSFS
1352 net->queues_kset = kset_create_and_add("queues",
1353 NULL, &net->dev.kobj);
1354 if (!net->queues_kset)
1355 return -ENOMEM;
1356#endif
1357
1358#ifdef CONFIG_RPS
1359 real_rx = net->real_num_rx_queues;
1360#endif
1361 real_tx = net->real_num_tx_queues;
1362
1363 error = net_rx_queue_update_kobjects(net, 0, real_rx);
1364 if (error)
1365 goto error;
1366 rxq = real_rx;
1367
1368 error = netdev_queue_update_kobjects(net, 0, real_tx);
1369 if (error)
1370 goto error;
1371 txq = real_tx;
1372
1373 return 0;
1374
1375error:
1376 netdev_queue_update_kobjects(net, txq, 0);
1377 net_rx_queue_update_kobjects(net, rxq, 0);
1378 return error;
1379}
1380
1381static void remove_queue_kobjects(struct net_device *net)
1382{
1383 int real_rx = 0, real_tx = 0;
1384
1385#ifdef CONFIG_RPS
1386 real_rx = net->real_num_rx_queues;
1387#endif
1388 real_tx = net->real_num_tx_queues;
1389
1390 net_rx_queue_update_kobjects(net, real_rx, 0);
1391 netdev_queue_update_kobjects(net, real_tx, 0);
1392#ifdef CONFIG_SYSFS
1393 kset_unregister(net->queues_kset);
1394#endif
1395}
1396
1397static bool net_current_may_mount(void)
1398{
1399 struct net *net = current->nsproxy->net_ns;
1400
1401 return ns_capable(net->user_ns, CAP_SYS_ADMIN);
1402}
1403
1404static void *net_grab_current_ns(void)
1405{
1406 struct net *ns = current->nsproxy->net_ns;
1407#ifdef CONFIG_NET_NS
1408 if (ns)
1409 atomic_inc(&ns->passive);
1410#endif
1411 return ns;
1412}
1413
1414static const void *net_initial_ns(void)
1415{
1416 return &init_net;
1417}
1418
1419static const void *net_netlink_ns(struct sock *sk)
1420{
1421 return sock_net(sk);
1422}
1423
1424struct kobj_ns_type_operations net_ns_type_operations = {
1425 .type = KOBJ_NS_TYPE_NET,
1426 .current_may_mount = net_current_may_mount,
1427 .grab_current_ns = net_grab_current_ns,
1428 .netlink_ns = net_netlink_ns,
1429 .initial_ns = net_initial_ns,
1430 .drop_ns = net_drop_ns,
1431};
1432EXPORT_SYMBOL_GPL(net_ns_type_operations);
1433
1434static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
1435{
1436 struct net_device *dev = to_net_dev(d);
1437 int retval;
1438
1439
1440 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
1441 if (retval)
1442 goto exit;
1443
1444
1445
1446
1447 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1448
1449exit:
1450 return retval;
1451}
1452
1453
1454
1455
1456
1457static void netdev_release(struct device *d)
1458{
1459 struct net_device *dev = to_net_dev(d);
1460
1461 BUG_ON(dev->reg_state != NETREG_RELEASED);
1462
1463 kfree(dev->ifalias);
1464 netdev_freemem(dev);
1465}
1466
1467static const void *net_namespace(struct device *d)
1468{
1469 struct net_device *dev;
1470 dev = container_of(d, struct net_device, dev);
1471 return dev_net(dev);
1472}
1473
1474static struct class net_class = {
1475 .name = "net",
1476 .dev_release = netdev_release,
1477 .dev_groups = net_class_groups,
1478 .dev_uevent = netdev_uevent,
1479 .ns_type = &net_ns_type_operations,
1480 .namespace = net_namespace,
1481};
1482
1483
1484
1485
1486void netdev_unregister_kobject(struct net_device * net)
1487{
1488 struct device *dev = &(net->dev);
1489
1490 kobject_get(&dev->kobj);
1491
1492 remove_queue_kobjects(net);
1493
1494 pm_runtime_set_memalloc_noio(dev, false);
1495
1496 device_del(dev);
1497}
1498
1499
1500int netdev_register_kobject(struct net_device *net)
1501{
1502 struct device *dev = &(net->dev);
1503 const struct attribute_group **groups = net->sysfs_groups;
1504 int error = 0;
1505
1506 device_initialize(dev);
1507 dev->class = &net_class;
1508 dev->platform_data = net;
1509 dev->groups = groups;
1510
1511 dev_set_name(dev, "%s", net->name);
1512
1513#ifdef CONFIG_SYSFS
1514
1515 if (*groups)
1516 groups++;
1517
1518 *groups++ = &netstat_group;
1519
1520#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
1521 if (net->ieee80211_ptr)
1522 *groups++ = &wireless_group;
1523#if IS_ENABLED(CONFIG_WIRELESS_EXT)
1524 else if (net->wireless_handlers)
1525 *groups++ = &wireless_group;
1526#endif
1527#endif
1528#endif
1529
1530 error = device_add(dev);
1531 if (error)
1532 return error;
1533
1534 error = register_queue_kobjects(net);
1535 if (error) {
1536 device_del(dev);
1537 return error;
1538 }
1539
1540 pm_runtime_set_memalloc_noio(dev, true);
1541
1542 return error;
1543}
1544
1545int netdev_class_create_file_ns(struct class_attribute *class_attr,
1546 const void *ns)
1547{
1548 return class_create_file_ns(&net_class, class_attr, ns);
1549}
1550EXPORT_SYMBOL(netdev_class_create_file_ns);
1551
1552void netdev_class_remove_file_ns(struct class_attribute *class_attr,
1553 const void *ns)
1554{
1555 class_remove_file_ns(&net_class, class_attr, ns);
1556}
1557EXPORT_SYMBOL(netdev_class_remove_file_ns);
1558
1559int netdev_kobject_init(void)
1560{
1561 kobj_ns_type_register(&net_ns_type_operations);
1562 return class_register(&net_class);
1563}
1564
