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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 size_t len = 0;
674 int i;
675
676 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
677 return -ENOMEM;
678
679 rcu_read_lock();
680 map = rcu_dereference(queue->rps_map);
681 if (map)
682 for (i = 0; i < map->len; i++)
683 cpumask_set_cpu(map->cpus[i], mask);
684
685 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
686 if (PAGE_SIZE - len < 3) {
687 rcu_read_unlock();
688 free_cpumask_var(mask);
689 return -EINVAL;
690 }
691 rcu_read_unlock();
692
693 free_cpumask_var(mask);
694 len += sprintf(buf + len, "\n");
695 return len;
696}
697
698static ssize_t store_rps_map(struct netdev_rx_queue *queue,
699 struct rx_queue_attribute *attribute,
700 const char *buf, size_t len)
701{
702 struct rps_map *old_map, *map;
703 cpumask_var_t mask;
704 int err, cpu, i;
705 static DEFINE_SPINLOCK(rps_map_lock);
706
707 if (!capable(CAP_NET_ADMIN))
708 return -EPERM;
709
710 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
711 return -ENOMEM;
712
713 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
714 if (err) {
715 free_cpumask_var(mask);
716 return err;
717 }
718
719 map = kzalloc(max_t(unsigned int,
720 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
721 GFP_KERNEL);
722 if (!map) {
723 free_cpumask_var(mask);
724 return -ENOMEM;
725 }
726
727 i = 0;
728 for_each_cpu_and(cpu, mask, cpu_online_mask)
729 map->cpus[i++] = cpu;
730
731 if (i)
732 map->len = i;
733 else {
734 kfree(map);
735 map = NULL;
736 }
737
738 spin_lock(&rps_map_lock);
739 old_map = rcu_dereference_protected(queue->rps_map,
740 lockdep_is_held(&rps_map_lock));
741 rcu_assign_pointer(queue->rps_map, map);
742 spin_unlock(&rps_map_lock);
743
744 if (map)
745 static_key_slow_inc(&rps_needed);
746 if (old_map) {
747 kfree_rcu(old_map, rcu);
748 static_key_slow_dec(&rps_needed);
749 }
750 free_cpumask_var(mask);
751 return len;
752}
753
754static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
755 struct rx_queue_attribute *attr,
756 char *buf)
757{
758 struct rps_dev_flow_table *flow_table;
759 unsigned long val = 0;
760
761 rcu_read_lock();
762 flow_table = rcu_dereference(queue->rps_flow_table);
763 if (flow_table)
764 val = (unsigned long)flow_table->mask + 1;
765 rcu_read_unlock();
766
767 return sprintf(buf, "%lu\n", val);
768}
769
770static void rps_dev_flow_table_release(struct rcu_head *rcu)
771{
772 struct rps_dev_flow_table *table = container_of(rcu,
773 struct rps_dev_flow_table, rcu);
774 vfree(table);
775}
776
777static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
778 struct rx_queue_attribute *attr,
779 const char *buf, size_t len)
780{
781 unsigned long mask, count;
782 struct rps_dev_flow_table *table, *old_table;
783 static DEFINE_SPINLOCK(rps_dev_flow_lock);
784 int rc;
785
786 if (!capable(CAP_NET_ADMIN))
787 return -EPERM;
788
789 rc = kstrtoul(buf, 0, &count);
790 if (rc < 0)
791 return rc;
792
793 if (count) {
794 mask = count - 1;
795
796
797
798 while ((mask | (mask >> 1)) != mask)
799 mask |= (mask >> 1);
800
801
802
803
804#if BITS_PER_LONG > 32
805 if (mask > (unsigned long)(u32)mask)
806 return -EINVAL;
807#else
808 if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1))
809 / sizeof(struct rps_dev_flow)) {
810
811 return -EINVAL;
812 }
813#endif
814 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1));
815 if (!table)
816 return -ENOMEM;
817
818 table->mask = mask;
819 for (count = 0; count <= mask; count++)
820 table->flows[count].cpu = RPS_NO_CPU;
821 } else
822 table = NULL;
823
824 spin_lock(&rps_dev_flow_lock);
825 old_table = rcu_dereference_protected(queue->rps_flow_table,
826 lockdep_is_held(&rps_dev_flow_lock));
827 rcu_assign_pointer(queue->rps_flow_table, table);
828 spin_unlock(&rps_dev_flow_lock);
829
830 if (old_table)
831 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
832
833 return len;
834}
835
836static struct rx_queue_attribute rps_cpus_attribute =
837 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
838
839
840static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
841 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
842 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
843
844static struct attribute *rx_queue_default_attrs[] = {
845 &rps_cpus_attribute.attr,
846 &rps_dev_flow_table_cnt_attribute.attr,
847 NULL
848};
849
850static void rx_queue_release(struct kobject *kobj)
851{
852 struct netdev_rx_queue *queue = to_rx_queue(kobj);
853 struct rps_map *map;
854 struct rps_dev_flow_table *flow_table;
855
856
857 map = rcu_dereference_protected(queue->rps_map, 1);
858 if (map) {
859 RCU_INIT_POINTER(queue->rps_map, NULL);
860 kfree_rcu(map, rcu);
861 }
862
863 flow_table = rcu_dereference_protected(queue->rps_flow_table, 1);
864 if (flow_table) {
865 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
866 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
867 }
868
869 memset(kobj, 0, sizeof(*kobj));
870 dev_put(queue->dev);
871}
872
873static const void *rx_queue_namespace(struct kobject *kobj)
874{
875 struct netdev_rx_queue *queue = to_rx_queue(kobj);
876 struct device *dev = &queue->dev->dev;
877 const void *ns = NULL;
878
879 if (dev->class && dev->class->ns_type)
880 ns = dev->class->namespace(dev);
881
882 return ns;
883}
884
885static struct kobj_type rx_queue_ktype = {
886 .sysfs_ops = &rx_queue_sysfs_ops,
887 .release = rx_queue_release,
888 .default_attrs = rx_queue_default_attrs,
889 .namespace = rx_queue_namespace
890};
891
892static int rx_queue_add_kobject(struct net_device *net, int index)
893{
894 struct netdev_rx_queue *queue = net->_rx + index;
895 struct kobject *kobj = &queue->kobj;
896 int error = 0;
897
898 kobj->kset = net->queues_kset;
899 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
900 "rx-%u", index);
901 if (error) {
902 kobject_put(kobj);
903 return error;
904 }
905
906 kobject_uevent(kobj, KOBJ_ADD);
907 dev_hold(queue->dev);
908
909 return error;
910}
911#endif
912
913int
914net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
915{
916#ifdef CONFIG_RPS
917 int i;
918 int error = 0;
919
920 for (i = old_num; i < new_num; i++) {
921 error = rx_queue_add_kobject(net, i);
922 if (error) {
923 new_num = old_num;
924 break;
925 }
926 }
927
928 while (--i >= new_num)
929 kobject_put(&net->_rx[i].kobj);
930
931 return error;
932#else
933 return 0;
934#endif
935}
936
937#ifdef CONFIG_SYSFS
938
939
940
941struct netdev_queue_attribute {
942 struct attribute attr;
943 ssize_t (*show)(struct netdev_queue *queue,
944 struct netdev_queue_attribute *attr, char *buf);
945 ssize_t (*store)(struct netdev_queue *queue,
946 struct netdev_queue_attribute *attr, const char *buf, size_t len);
947};
948#define to_netdev_queue_attr(_attr) container_of(_attr, \
949 struct netdev_queue_attribute, attr)
950
951#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
952
953static ssize_t netdev_queue_attr_show(struct kobject *kobj,
954 struct attribute *attr, char *buf)
955{
956 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
957 struct netdev_queue *queue = to_netdev_queue(kobj);
958
959 if (!attribute->show)
960 return -EIO;
961
962 return attribute->show(queue, attribute, buf);
963}
964
965static ssize_t netdev_queue_attr_store(struct kobject *kobj,
966 struct attribute *attr,
967 const char *buf, size_t count)
968{
969 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
970 struct netdev_queue *queue = to_netdev_queue(kobj);
971
972 if (!attribute->store)
973 return -EIO;
974
975 return attribute->store(queue, attribute, buf, count);
976}
977
978static const struct sysfs_ops netdev_queue_sysfs_ops = {
979 .show = netdev_queue_attr_show,
980 .store = netdev_queue_attr_store,
981};
982
983static ssize_t show_trans_timeout(struct netdev_queue *queue,
984 struct netdev_queue_attribute *attribute,
985 char *buf)
986{
987 unsigned long trans_timeout;
988
989 spin_lock_irq(&queue->_xmit_lock);
990 trans_timeout = queue->trans_timeout;
991 spin_unlock_irq(&queue->_xmit_lock);
992
993 return sprintf(buf, "%lu", trans_timeout);
994}
995
996#ifdef CONFIG_XPS
997static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
998{
999 struct net_device *dev = queue->dev;
1000 unsigned int i;
1001
1002 i = queue - dev->_tx;
1003 BUG_ON(i >= dev->num_tx_queues);
1004
1005 return i;
1006}
1007
1008static ssize_t show_tx_maxrate(struct netdev_queue *queue,
1009 struct netdev_queue_attribute *attribute,
1010 char *buf)
1011{
1012 return sprintf(buf, "%lu\n", queue->tx_maxrate);
1013}
1014
1015static ssize_t set_tx_maxrate(struct netdev_queue *queue,
1016 struct netdev_queue_attribute *attribute,
1017 const char *buf, size_t len)
1018{
1019 struct net_device *dev = queue->dev;
1020 int err, index = get_netdev_queue_index(queue);
1021 u32 rate = 0;
1022
1023 err = kstrtou32(buf, 10, &rate);
1024 if (err < 0)
1025 return err;
1026
1027 if (!rtnl_trylock())
1028 return restart_syscall();
1029
1030 err = -EOPNOTSUPP;
1031 if (get_ndo_ext(dev->netdev_ops, ndo_set_tx_maxrate))
1032 err = get_ndo_ext(dev->netdev_ops, ndo_set_tx_maxrate)(dev, index, rate);
1033
1034 rtnl_unlock();
1035 if (!err) {
1036 queue->tx_maxrate = rate;
1037 return len;
1038 }
1039 return err;
1040}
1041
1042static struct netdev_queue_attribute queue_tx_maxrate =
1043 __ATTR(tx_maxrate, S_IRUGO | S_IWUSR,
1044 show_tx_maxrate, set_tx_maxrate);
1045#endif
1046
1047static struct netdev_queue_attribute queue_trans_timeout =
1048 __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL);
1049
1050#ifdef CONFIG_BQL
1051
1052
1053
1054static ssize_t bql_show(char *buf, unsigned int value)
1055{
1056 return sprintf(buf, "%u\n", value);
1057}
1058
1059static ssize_t bql_set(const char *buf, const size_t count,
1060 unsigned int *pvalue)
1061{
1062 unsigned int value;
1063 int err;
1064
1065 if (!strcmp(buf, "max") || !strcmp(buf, "max\n"))
1066 value = DQL_MAX_LIMIT;
1067 else {
1068 err = kstrtouint(buf, 10, &value);
1069 if (err < 0)
1070 return err;
1071 if (value > DQL_MAX_LIMIT)
1072 return -EINVAL;
1073 }
1074
1075 *pvalue = value;
1076
1077 return count;
1078}
1079
1080static ssize_t bql_show_hold_time(struct netdev_queue *queue,
1081 struct netdev_queue_attribute *attr,
1082 char *buf)
1083{
1084 struct dql *dql = &queue->dql;
1085
1086 return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time));
1087}
1088
1089static ssize_t bql_set_hold_time(struct netdev_queue *queue,
1090 struct netdev_queue_attribute *attribute,
1091 const char *buf, size_t len)
1092{
1093 struct dql *dql = &queue->dql;
1094 unsigned int value;
1095 int err;
1096
1097 err = kstrtouint(buf, 10, &value);
1098 if (err < 0)
1099 return err;
1100
1101 dql->slack_hold_time = msecs_to_jiffies(value);
1102
1103 return len;
1104}
1105
1106static struct netdev_queue_attribute bql_hold_time_attribute =
1107 __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time,
1108 bql_set_hold_time);
1109
1110static ssize_t bql_show_inflight(struct netdev_queue *queue,
1111 struct netdev_queue_attribute *attr,
1112 char *buf)
1113{
1114 struct dql *dql = &queue->dql;
1115
1116 return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed);
1117}
1118
1119static struct netdev_queue_attribute bql_inflight_attribute =
1120 __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL);
1121
1122#define BQL_ATTR(NAME, FIELD) \
1123static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \
1124 struct netdev_queue_attribute *attr, \
1125 char *buf) \
1126{ \
1127 return bql_show(buf, queue->dql.FIELD); \
1128} \
1129 \
1130static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \
1131 struct netdev_queue_attribute *attr, \
1132 const char *buf, size_t len) \
1133{ \
1134 return bql_set(buf, len, &queue->dql.FIELD); \
1135} \
1136 \
1137static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \
1138 __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \
1139 bql_set_ ## NAME);
1140
1141BQL_ATTR(limit, limit)
1142BQL_ATTR(limit_max, max_limit)
1143BQL_ATTR(limit_min, min_limit)
1144
1145static struct attribute *dql_attrs[] = {
1146 &bql_limit_attribute.attr,
1147 &bql_limit_max_attribute.attr,
1148 &bql_limit_min_attribute.attr,
1149 &bql_hold_time_attribute.attr,
1150 &bql_inflight_attribute.attr,
1151 NULL
1152};
1153
1154static struct attribute_group dql_group = {
1155 .name = "byte_queue_limits",
1156 .attrs = dql_attrs,
1157};
1158#endif
1159
1160#ifdef CONFIG_XPS
1161static ssize_t show_xps_map(struct netdev_queue *queue,
1162 struct netdev_queue_attribute *attribute, char *buf)
1163{
1164 struct net_device *dev = queue->dev;
1165 struct xps_dev_maps *dev_maps;
1166 cpumask_var_t mask;
1167 unsigned long index;
1168 size_t len = 0;
1169 int i;
1170
1171 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
1172 return -ENOMEM;
1173
1174 index = get_netdev_queue_index(queue);
1175
1176 rcu_read_lock();
1177 dev_maps = rcu_dereference(dev->xps_maps);
1178 if (dev_maps) {
1179 for_each_possible_cpu(i) {
1180 struct xps_map *map =
1181 rcu_dereference(dev_maps->cpu_map[i]);
1182 if (map) {
1183 int j;
1184 for (j = 0; j < map->len; j++) {
1185 if (map->queues[j] == index) {
1186 cpumask_set_cpu(i, mask);
1187 break;
1188 }
1189 }
1190 }
1191 }
1192 }
1193 rcu_read_unlock();
1194
1195 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
1196 if (PAGE_SIZE - len < 3) {
1197 free_cpumask_var(mask);
1198 return -EINVAL;
1199 }
1200
1201 free_cpumask_var(mask);
1202 len += sprintf(buf + len, "\n");
1203 return len;
1204}
1205
1206static ssize_t store_xps_map(struct netdev_queue *queue,
1207 struct netdev_queue_attribute *attribute,
1208 const char *buf, size_t len)
1209{
1210 struct net_device *dev = queue->dev;
1211 unsigned long index;
1212 cpumask_var_t mask;
1213 int err;
1214
1215 if (!capable(CAP_NET_ADMIN))
1216 return -EPERM;
1217
1218 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
1219 return -ENOMEM;
1220
1221 index = get_netdev_queue_index(queue);
1222
1223 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
1224 if (err) {
1225 free_cpumask_var(mask);
1226 return err;
1227 }
1228
1229 err = netif_set_xps_queue(dev, mask, index);
1230
1231 free_cpumask_var(mask);
1232
1233 return err ? : len;
1234}
1235
1236static struct netdev_queue_attribute xps_cpus_attribute =
1237 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
1238#endif
1239
1240static struct attribute *netdev_queue_default_attrs[] = {
1241 &queue_trans_timeout.attr,
1242#ifdef CONFIG_XPS
1243 &xps_cpus_attribute.attr,
1244 &queue_tx_maxrate.attr,
1245#endif
1246 NULL
1247};
1248
1249static void netdev_queue_release(struct kobject *kobj)
1250{
1251 struct netdev_queue *queue = to_netdev_queue(kobj);
1252
1253 memset(kobj, 0, sizeof(*kobj));
1254 dev_put(queue->dev);
1255}
1256
1257static const void *netdev_queue_namespace(struct kobject *kobj)
1258{
1259 struct netdev_queue *queue = to_netdev_queue(kobj);
1260 struct device *dev = &queue->dev->dev;
1261 const void *ns = NULL;
1262
1263 if (dev->class && dev->class->ns_type)
1264 ns = dev->class->namespace(dev);
1265
1266 return ns;
1267}
1268
1269static struct kobj_type netdev_queue_ktype = {
1270 .sysfs_ops = &netdev_queue_sysfs_ops,
1271 .release = netdev_queue_release,
1272 .default_attrs = netdev_queue_default_attrs,
1273 .namespace = netdev_queue_namespace,
1274};
1275
1276static int netdev_queue_add_kobject(struct net_device *net, int index)
1277{
1278 struct netdev_queue *queue = net->_tx + index;
1279 struct kobject *kobj = &queue->kobj;
1280 int error = 0;
1281
1282 kobj->kset = net->queues_kset;
1283 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1284 "tx-%u", index);
1285 if (error)
1286 goto exit;
1287
1288#ifdef CONFIG_BQL
1289 error = sysfs_create_group(kobj, &dql_group);
1290 if (error)
1291 goto exit;
1292#endif
1293
1294 kobject_uevent(kobj, KOBJ_ADD);
1295 dev_hold(queue->dev);
1296
1297 return 0;
1298exit:
1299 kobject_put(kobj);
1300 return error;
1301}
1302#endif
1303
1304int
1305netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
1306{
1307#ifdef CONFIG_SYSFS
1308 int i;
1309 int error = 0;
1310
1311 for (i = old_num; i < new_num; i++) {
1312 error = netdev_queue_add_kobject(net, i);
1313 if (error) {
1314 new_num = old_num;
1315 break;
1316 }
1317 }
1318
1319 while (--i >= new_num) {
1320 struct netdev_queue *queue = net->_tx + i;
1321
1322#ifdef CONFIG_BQL
1323 sysfs_remove_group(&queue->kobj, &dql_group);
1324#endif
1325 kobject_put(&queue->kobj);
1326 }
1327
1328 return error;
1329#else
1330 return 0;
1331#endif
1332}
1333
1334static int register_queue_kobjects(struct net_device *net)
1335{
1336 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
1337
1338#ifdef CONFIG_SYSFS
1339 net->queues_kset = kset_create_and_add("queues",
1340 NULL, &net->dev.kobj);
1341 if (!net->queues_kset)
1342 return -ENOMEM;
1343#endif
1344
1345#ifdef CONFIG_RPS
1346 real_rx = net->real_num_rx_queues;
1347#endif
1348 real_tx = net->real_num_tx_queues;
1349
1350 error = net_rx_queue_update_kobjects(net, 0, real_rx);
1351 if (error)
1352 goto error;
1353 rxq = real_rx;
1354
1355 error = netdev_queue_update_kobjects(net, 0, real_tx);
1356 if (error)
1357 goto error;
1358 txq = real_tx;
1359
1360 return 0;
1361
1362error:
1363 netdev_queue_update_kobjects(net, txq, 0);
1364 net_rx_queue_update_kobjects(net, rxq, 0);
1365 return error;
1366}
1367
1368static void remove_queue_kobjects(struct net_device *net)
1369{
1370 int real_rx = 0, real_tx = 0;
1371
1372#ifdef CONFIG_RPS
1373 real_rx = net->real_num_rx_queues;
1374#endif
1375 real_tx = net->real_num_tx_queues;
1376
1377 net_rx_queue_update_kobjects(net, real_rx, 0);
1378 netdev_queue_update_kobjects(net, real_tx, 0);
1379#ifdef CONFIG_SYSFS
1380 kset_unregister(net->queues_kset);
1381#endif
1382}
1383
1384static bool net_current_may_mount(void)
1385{
1386 struct net *net = current->nsproxy->net_ns;
1387
1388 return ns_capable(net->user_ns, CAP_SYS_ADMIN);
1389}
1390
1391static void *net_grab_current_ns(void)
1392{
1393 struct net *ns = current->nsproxy->net_ns;
1394#ifdef CONFIG_NET_NS
1395 if (ns)
1396 atomic_inc(&ns->passive);
1397#endif
1398 return ns;
1399}
1400
1401static const void *net_initial_ns(void)
1402{
1403 return &init_net;
1404}
1405
1406static const void *net_netlink_ns(struct sock *sk)
1407{
1408 return sock_net(sk);
1409}
1410
1411struct kobj_ns_type_operations net_ns_type_operations = {
1412 .type = KOBJ_NS_TYPE_NET,
1413 .current_may_mount = net_current_may_mount,
1414 .grab_current_ns = net_grab_current_ns,
1415 .netlink_ns = net_netlink_ns,
1416 .initial_ns = net_initial_ns,
1417 .drop_ns = net_drop_ns,
1418};
1419EXPORT_SYMBOL_GPL(net_ns_type_operations);
1420
1421static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
1422{
1423 struct net_device *dev = to_net_dev(d);
1424 int retval;
1425
1426
1427 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
1428 if (retval)
1429 goto exit;
1430
1431
1432
1433
1434 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1435
1436exit:
1437 return retval;
1438}
1439
1440
1441
1442
1443
1444static void netdev_release(struct device *d)
1445{
1446 struct net_device *dev = to_net_dev(d);
1447
1448 BUG_ON(dev->reg_state != NETREG_RELEASED);
1449
1450 kfree(dev->ifalias);
1451 netdev_freemem(dev);
1452}
1453
1454static const void *net_namespace(struct device *d)
1455{
1456 struct net_device *dev;
1457 dev = container_of(d, struct net_device, dev);
1458 return dev_net(dev);
1459}
1460
1461static struct class net_class = {
1462 .name = "net",
1463 .dev_release = netdev_release,
1464 .dev_groups = net_class_groups,
1465 .dev_uevent = netdev_uevent,
1466 .ns_type = &net_ns_type_operations,
1467 .namespace = net_namespace,
1468};
1469
1470
1471
1472
1473void netdev_unregister_kobject(struct net_device * net)
1474{
1475 struct device *dev = &(net->dev);
1476
1477 kobject_get(&dev->kobj);
1478
1479 remove_queue_kobjects(net);
1480
1481 pm_runtime_set_memalloc_noio(dev, false);
1482
1483 device_del(dev);
1484}
1485
1486
1487int netdev_register_kobject(struct net_device *net)
1488{
1489 struct device *dev = &(net->dev);
1490 const struct attribute_group **groups = net->sysfs_groups;
1491 int error = 0;
1492
1493 device_initialize(dev);
1494 dev->class = &net_class;
1495 dev->platform_data = net;
1496 dev->groups = groups;
1497
1498 dev_set_name(dev, "%s", net->name);
1499
1500#ifdef CONFIG_SYSFS
1501
1502 if (*groups)
1503 groups++;
1504
1505 *groups++ = &netstat_group;
1506
1507#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
1508 if (net->ieee80211_ptr)
1509 *groups++ = &wireless_group;
1510#if IS_ENABLED(CONFIG_WIRELESS_EXT)
1511 else if (net->wireless_handlers)
1512 *groups++ = &wireless_group;
1513#endif
1514#endif
1515#endif
1516
1517 error = device_add(dev);
1518 if (error)
1519 return error;
1520
1521 error = register_queue_kobjects(net);
1522 if (error) {
1523 device_del(dev);
1524 return error;
1525 }
1526
1527 pm_runtime_set_memalloc_noio(dev, true);
1528
1529 return error;
1530}
1531
1532int netdev_class_create_file_ns(struct class_attribute *class_attr,
1533 const void *ns)
1534{
1535 return class_create_file_ns(&net_class, class_attr, ns);
1536}
1537EXPORT_SYMBOL(netdev_class_create_file_ns);
1538
1539void netdev_class_remove_file_ns(struct class_attribute *class_attr,
1540 const void *ns)
1541{
1542 class_remove_file_ns(&net_class, class_attr, ns);
1543}
1544EXPORT_SYMBOL(netdev_class_remove_file_ns);
1545
1546int netdev_kobject_init(void)
1547{
1548 kobj_ns_type_register(&net_ns_type_operations);
1549 return class_register(&net_class);
1550}
1551
