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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#include <linux/of.h>
27
28#include "net-sysfs.h"
29
30#ifdef CONFIG_SYSFS
31static const char fmt_hex[] = "%#x\n";
32static const char fmt_long_hex[] = "%#lx\n";
33static const char fmt_dec[] = "%d\n";
34static const char fmt_udec[] = "%u\n";
35static const char fmt_ulong[] = "%lu\n";
36static const char fmt_u64[] = "%llu\n";
37
38static inline int dev_isalive(const struct net_device *dev)
39{
40 return dev->reg_state <= NETREG_REGISTERED;
41}
42
43
44static ssize_t netdev_show(const struct device *dev,
45 struct device_attribute *attr, char *buf,
46 ssize_t (*format)(const struct net_device *, char *))
47{
48 struct net_device *ndev = to_net_dev(dev);
49 ssize_t ret = -EINVAL;
50
51 read_lock(&dev_base_lock);
52 if (dev_isalive(ndev))
53 ret = (*format)(ndev, buf);
54 read_unlock(&dev_base_lock);
55
56 return ret;
57}
58
59
60#define NETDEVICE_SHOW(field, format_string) \
61static ssize_t format_##field(const struct net_device *dev, char *buf) \
62{ \
63 return sprintf(buf, format_string, dev->field); \
64} \
65static ssize_t field##_show(struct device *dev, \
66 struct device_attribute *attr, char *buf) \
67{ \
68 return netdev_show(dev, attr, buf, format_##field); \
69} \
70
71#define NETDEVICE_SHOW_RO(field, format_string) \
72NETDEVICE_SHOW(field, format_string); \
73static DEVICE_ATTR_RO(field)
74
75#define NETDEVICE_SHOW_RW(field, format_string) \
76NETDEVICE_SHOW(field, format_string); \
77static DEVICE_ATTR_RW(field)
78
79
80static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
81 const char *buf, size_t len,
82 int (*set)(struct net_device *, unsigned long))
83{
84 struct net_device *netdev = to_net_dev(dev);
85 struct net *net = dev_net(netdev);
86 unsigned long new;
87 int ret = -EINVAL;
88
89 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
90 return -EPERM;
91
92 ret = kstrtoul(buf, 0, &new);
93 if (ret)
94 goto err;
95
96 if (!rtnl_trylock())
97 return restart_syscall();
98
99 if (dev_isalive(netdev)) {
100 if ((ret = (*set)(netdev, new)) == 0)
101 ret = len;
102 }
103 rtnl_unlock();
104 err:
105 return ret;
106}
107
108NETDEVICE_SHOW_RO(dev_id, fmt_hex);
109NETDEVICE_SHOW_RO(dev_port, fmt_dec);
110NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
111NETDEVICE_SHOW_RO(addr_len, fmt_dec);
112NETDEVICE_SHOW_RO(ifindex, fmt_dec);
113NETDEVICE_SHOW_RO(type, fmt_dec);
114NETDEVICE_SHOW_RO(link_mode, fmt_dec);
115
116static ssize_t iflink_show(struct device *dev, struct device_attribute *attr,
117 char *buf)
118{
119 struct net_device *ndev = to_net_dev(dev);
120
121 return sprintf(buf, fmt_dec, dev_get_iflink(ndev));
122}
123static DEVICE_ATTR_RO(iflink);
124
125static ssize_t format_name_assign_type(const struct net_device *dev, char *buf)
126{
127 return sprintf(buf, fmt_dec, dev->name_assign_type);
128}
129
130static ssize_t name_assign_type_show(struct device *dev,
131 struct device_attribute *attr,
132 char *buf)
133{
134 struct net_device *ndev = to_net_dev(dev);
135 ssize_t ret = -EINVAL;
136
137 if (ndev->name_assign_type != NET_NAME_UNKNOWN)
138 ret = netdev_show(dev, attr, buf, format_name_assign_type);
139
140 return ret;
141}
142static DEVICE_ATTR_RO(name_assign_type);
143
144
145static ssize_t address_show(struct device *dev, struct device_attribute *attr,
146 char *buf)
147{
148 struct net_device *ndev = to_net_dev(dev);
149 ssize_t ret = -EINVAL;
150
151 read_lock(&dev_base_lock);
152 if (dev_isalive(ndev))
153 ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len);
154 read_unlock(&dev_base_lock);
155 return ret;
156}
157static DEVICE_ATTR_RO(address);
158
159static ssize_t broadcast_show(struct device *dev,
160 struct device_attribute *attr, char *buf)
161{
162 struct net_device *ndev = to_net_dev(dev);
163 if (dev_isalive(ndev))
164 return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len);
165 return -EINVAL;
166}
167static DEVICE_ATTR_RO(broadcast);
168
169static int change_carrier(struct net_device *dev, unsigned long new_carrier)
170{
171 if (!netif_running(dev))
172 return -EINVAL;
173 return dev_change_carrier(dev, (bool) new_carrier);
174}
175
176static ssize_t carrier_store(struct device *dev, struct device_attribute *attr,
177 const char *buf, size_t len)
178{
179 return netdev_store(dev, attr, buf, len, change_carrier);
180}
181
182static ssize_t carrier_show(struct device *dev,
183 struct device_attribute *attr, char *buf)
184{
185 struct net_device *netdev = to_net_dev(dev);
186 if (netif_running(netdev)) {
187 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
188 }
189 return -EINVAL;
190}
191static DEVICE_ATTR_RW(carrier);
192
193static ssize_t speed_show(struct device *dev,
194 struct device_attribute *attr, char *buf)
195{
196 struct net_device *netdev = to_net_dev(dev);
197 int ret = -EINVAL;
198
199 if (!rtnl_trylock())
200 return restart_syscall();
201
202 if (netif_running(netdev)) {
203 struct ethtool_cmd cmd;
204 if (!__ethtool_get_settings(netdev, &cmd))
205 ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd));
206 }
207 rtnl_unlock();
208 return ret;
209}
210static DEVICE_ATTR_RO(speed);
211
212static ssize_t duplex_show(struct device *dev,
213 struct device_attribute *attr, char *buf)
214{
215 struct net_device *netdev = to_net_dev(dev);
216 int ret = -EINVAL;
217
218 if (!rtnl_trylock())
219 return restart_syscall();
220
221 if (netif_running(netdev)) {
222 struct ethtool_cmd cmd;
223 if (!__ethtool_get_settings(netdev, &cmd)) {
224 const char *duplex;
225 switch (cmd.duplex) {
226 case DUPLEX_HALF:
227 duplex = "half";
228 break;
229 case DUPLEX_FULL:
230 duplex = "full";
231 break;
232 default:
233 duplex = "unknown";
234 break;
235 }
236 ret = sprintf(buf, "%s\n", duplex);
237 }
238 }
239 rtnl_unlock();
240 return ret;
241}
242static DEVICE_ATTR_RO(duplex);
243
244static ssize_t dormant_show(struct device *dev,
245 struct device_attribute *attr, char *buf)
246{
247 struct net_device *netdev = to_net_dev(dev);
248
249 if (netif_running(netdev))
250 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
251
252 return -EINVAL;
253}
254static DEVICE_ATTR_RO(dormant);
255
256static const char *const operstates[] = {
257 "unknown",
258 "notpresent",
259 "down",
260 "lowerlayerdown",
261 "testing",
262 "dormant",
263 "up"
264};
265
266static ssize_t operstate_show(struct device *dev,
267 struct device_attribute *attr, char *buf)
268{
269 const struct net_device *netdev = to_net_dev(dev);
270 unsigned char operstate;
271
272 read_lock(&dev_base_lock);
273 operstate = netdev->operstate;
274 if (!netif_running(netdev))
275 operstate = IF_OPER_DOWN;
276 read_unlock(&dev_base_lock);
277
278 if (operstate >= ARRAY_SIZE(operstates))
279 return -EINVAL;
280
281 return sprintf(buf, "%s\n", operstates[operstate]);
282}
283static DEVICE_ATTR_RO(operstate);
284
285static ssize_t carrier_changes_show(struct device *dev,
286 struct device_attribute *attr,
287 char *buf)
288{
289 struct net_device *netdev = to_net_dev(dev);
290 return sprintf(buf, fmt_dec,
291 atomic_read(&netdev->carrier_changes));
292}
293static DEVICE_ATTR_RO(carrier_changes);
294
295
296
297static int change_mtu(struct net_device *dev, unsigned long new_mtu)
298{
299 return dev_set_mtu(dev, (int) new_mtu);
300}
301
302static ssize_t mtu_store(struct device *dev, struct device_attribute *attr,
303 const char *buf, size_t len)
304{
305 return netdev_store(dev, attr, buf, len, change_mtu);
306}
307NETDEVICE_SHOW_RW(mtu, fmt_dec);
308
309static int change_flags(struct net_device *dev, unsigned long new_flags)
310{
311 return dev_change_flags(dev, (unsigned int) new_flags);
312}
313
314static ssize_t flags_store(struct device *dev, struct device_attribute *attr,
315 const char *buf, size_t len)
316{
317 return netdev_store(dev, attr, buf, len, change_flags);
318}
319NETDEVICE_SHOW_RW(flags, fmt_hex);
320
321static int change_tx_queue_len(struct net_device *dev, unsigned long new_len)
322{
323 dev->tx_queue_len = new_len;
324 return 0;
325}
326
327static ssize_t tx_queue_len_store(struct device *dev,
328 struct device_attribute *attr,
329 const char *buf, size_t len)
330{
331 if (!capable(CAP_NET_ADMIN))
332 return -EPERM;
333
334 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
335}
336NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong);
337
338static int change_gro_flush_timeout(struct net_device *dev, unsigned long val)
339{
340 dev->gro_flush_timeout = val;
341 return 0;
342}
343
344static ssize_t gro_flush_timeout_store(struct device *dev,
345 struct device_attribute *attr,
346 const char *buf, size_t len)
347{
348 if (!capable(CAP_NET_ADMIN))
349 return -EPERM;
350
351 return netdev_store(dev, attr, buf, len, change_gro_flush_timeout);
352}
353NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong);
354
355static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr,
356 const char *buf, size_t len)
357{
358 struct net_device *netdev = to_net_dev(dev);
359 struct net *net = dev_net(netdev);
360 size_t count = len;
361 ssize_t ret;
362
363 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
364 return -EPERM;
365
366
367 if (len > 0 && buf[len - 1] == '\n')
368 --count;
369
370 if (!rtnl_trylock())
371 return restart_syscall();
372 ret = dev_set_alias(netdev, buf, count);
373 rtnl_unlock();
374
375 return ret < 0 ? ret : len;
376}
377
378static ssize_t ifalias_show(struct device *dev,
379 struct device_attribute *attr, char *buf)
380{
381 const struct net_device *netdev = to_net_dev(dev);
382 ssize_t ret = 0;
383
384 if (!rtnl_trylock())
385 return restart_syscall();
386 if (netdev->ifalias)
387 ret = sprintf(buf, "%s\n", netdev->ifalias);
388 rtnl_unlock();
389 return ret;
390}
391static DEVICE_ATTR_RW(ifalias);
392
393static int change_group(struct net_device *dev, unsigned long new_group)
394{
395 dev_set_group(dev, (int) new_group);
396 return 0;
397}
398
399static ssize_t group_store(struct device *dev, struct device_attribute *attr,
400 const char *buf, size_t len)
401{
402 return netdev_store(dev, attr, buf, len, change_group);
403}
404NETDEVICE_SHOW(group, fmt_dec);
405static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store);
406
407static ssize_t phys_port_id_show(struct device *dev,
408 struct device_attribute *attr, char *buf)
409{
410 struct net_device *netdev = to_net_dev(dev);
411 ssize_t ret = -EINVAL;
412
413 if (!rtnl_trylock())
414 return restart_syscall();
415
416 if (dev_isalive(netdev)) {
417 struct netdev_phys_item_id ppid;
418
419 ret = dev_get_phys_port_id(netdev, &ppid);
420 if (!ret)
421 ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
422 }
423 rtnl_unlock();
424
425 return ret;
426}
427static DEVICE_ATTR_RO(phys_port_id);
428
429static ssize_t phys_port_name_show(struct device *dev,
430 struct device_attribute *attr, char *buf)
431{
432 struct net_device *netdev = to_net_dev(dev);
433 ssize_t ret = -EINVAL;
434
435 if (!rtnl_trylock())
436 return restart_syscall();
437
438 if (dev_isalive(netdev)) {
439 char name[IFNAMSIZ];
440
441 ret = dev_get_phys_port_name(netdev, name, sizeof(name));
442 if (!ret)
443 ret = sprintf(buf, "%s\n", name);
444 }
445 rtnl_unlock();
446
447 return ret;
448}
449static DEVICE_ATTR_RO(phys_port_name);
450
451static ssize_t phys_switch_id_show(struct device *dev,
452 struct device_attribute *attr, char *buf)
453{
454 struct net_device *netdev = to_net_dev(dev);
455 ssize_t ret = -EINVAL;
456
457 if (!rtnl_trylock())
458 return restart_syscall();
459
460 if (dev_isalive(netdev)) {
461 struct netdev_phys_item_id ppid;
462
463 ret = netdev_switch_parent_id_get(netdev, &ppid);
464 if (!ret)
465 ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
466 }
467 rtnl_unlock();
468
469 return ret;
470}
471static DEVICE_ATTR_RO(phys_switch_id);
472
473static struct attribute *net_class_attrs[] = {
474 &dev_attr_netdev_group.attr,
475 &dev_attr_type.attr,
476 &dev_attr_dev_id.attr,
477 &dev_attr_dev_port.attr,
478 &dev_attr_iflink.attr,
479 &dev_attr_ifindex.attr,
480 &dev_attr_name_assign_type.attr,
481 &dev_attr_addr_assign_type.attr,
482 &dev_attr_addr_len.attr,
483 &dev_attr_link_mode.attr,
484 &dev_attr_address.attr,
485 &dev_attr_broadcast.attr,
486 &dev_attr_speed.attr,
487 &dev_attr_duplex.attr,
488 &dev_attr_dormant.attr,
489 &dev_attr_operstate.attr,
490 &dev_attr_carrier_changes.attr,
491 &dev_attr_ifalias.attr,
492 &dev_attr_carrier.attr,
493 &dev_attr_mtu.attr,
494 &dev_attr_flags.attr,
495 &dev_attr_tx_queue_len.attr,
496 &dev_attr_gro_flush_timeout.attr,
497 &dev_attr_phys_port_id.attr,
498 &dev_attr_phys_port_name.attr,
499 &dev_attr_phys_switch_id.attr,
500 NULL,
501};
502ATTRIBUTE_GROUPS(net_class);
503
504
505static ssize_t netstat_show(const struct device *d,
506 struct device_attribute *attr, char *buf,
507 unsigned long offset)
508{
509 struct net_device *dev = to_net_dev(d);
510 ssize_t ret = -EINVAL;
511
512 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
513 offset % sizeof(u64) != 0);
514
515 read_lock(&dev_base_lock);
516 if (dev_isalive(dev)) {
517 struct rtnl_link_stats64 temp;
518 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
519
520 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
521 }
522 read_unlock(&dev_base_lock);
523 return ret;
524}
525
526
527#define NETSTAT_ENTRY(name) \
528static ssize_t name##_show(struct device *d, \
529 struct device_attribute *attr, char *buf) \
530{ \
531 return netstat_show(d, attr, buf, \
532 offsetof(struct rtnl_link_stats64, name)); \
533} \
534static DEVICE_ATTR_RO(name)
535
536NETSTAT_ENTRY(rx_packets);
537NETSTAT_ENTRY(tx_packets);
538NETSTAT_ENTRY(rx_bytes);
539NETSTAT_ENTRY(tx_bytes);
540NETSTAT_ENTRY(rx_errors);
541NETSTAT_ENTRY(tx_errors);
542NETSTAT_ENTRY(rx_dropped);
543NETSTAT_ENTRY(tx_dropped);
544NETSTAT_ENTRY(multicast);
545NETSTAT_ENTRY(collisions);
546NETSTAT_ENTRY(rx_length_errors);
547NETSTAT_ENTRY(rx_over_errors);
548NETSTAT_ENTRY(rx_crc_errors);
549NETSTAT_ENTRY(rx_frame_errors);
550NETSTAT_ENTRY(rx_fifo_errors);
551NETSTAT_ENTRY(rx_missed_errors);
552NETSTAT_ENTRY(tx_aborted_errors);
553NETSTAT_ENTRY(tx_carrier_errors);
554NETSTAT_ENTRY(tx_fifo_errors);
555NETSTAT_ENTRY(tx_heartbeat_errors);
556NETSTAT_ENTRY(tx_window_errors);
557NETSTAT_ENTRY(rx_compressed);
558NETSTAT_ENTRY(tx_compressed);
559
560static struct attribute *netstat_attrs[] = {
561 &dev_attr_rx_packets.attr,
562 &dev_attr_tx_packets.attr,
563 &dev_attr_rx_bytes.attr,
564 &dev_attr_tx_bytes.attr,
565 &dev_attr_rx_errors.attr,
566 &dev_attr_tx_errors.attr,
567 &dev_attr_rx_dropped.attr,
568 &dev_attr_tx_dropped.attr,
569 &dev_attr_multicast.attr,
570 &dev_attr_collisions.attr,
571 &dev_attr_rx_length_errors.attr,
572 &dev_attr_rx_over_errors.attr,
573 &dev_attr_rx_crc_errors.attr,
574 &dev_attr_rx_frame_errors.attr,
575 &dev_attr_rx_fifo_errors.attr,
576 &dev_attr_rx_missed_errors.attr,
577 &dev_attr_tx_aborted_errors.attr,
578 &dev_attr_tx_carrier_errors.attr,
579 &dev_attr_tx_fifo_errors.attr,
580 &dev_attr_tx_heartbeat_errors.attr,
581 &dev_attr_tx_window_errors.attr,
582 &dev_attr_rx_compressed.attr,
583 &dev_attr_tx_compressed.attr,
584 NULL
585};
586
587
588static struct attribute_group netstat_group = {
589 .name = "statistics",
590 .attrs = netstat_attrs,
591};
592
593#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
594static struct attribute *wireless_attrs[] = {
595 NULL
596};
597
598static struct attribute_group wireless_group = {
599 .name = "wireless",
600 .attrs = wireless_attrs,
601};
602#endif
603
604#else
605#define net_class_groups NULL
606#endif
607
608#ifdef CONFIG_SYSFS
609#define to_rx_queue_attr(_attr) container_of(_attr, \
610 struct rx_queue_attribute, attr)
611
612#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
613
614static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
615 char *buf)
616{
617 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
618 struct netdev_rx_queue *queue = to_rx_queue(kobj);
619
620 if (!attribute->show)
621 return -EIO;
622
623 return attribute->show(queue, attribute, buf);
624}
625
626static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
627 const char *buf, size_t count)
628{
629 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
630 struct netdev_rx_queue *queue = to_rx_queue(kobj);
631
632 if (!attribute->store)
633 return -EIO;
634
635 return attribute->store(queue, attribute, buf, count);
636}
637
638static const struct sysfs_ops rx_queue_sysfs_ops = {
639 .show = rx_queue_attr_show,
640 .store = rx_queue_attr_store,
641};
642
643#ifdef CONFIG_RPS
644static ssize_t show_rps_map(struct netdev_rx_queue *queue,
645 struct rx_queue_attribute *attribute, char *buf)
646{
647 struct rps_map *map;
648 cpumask_var_t mask;
649 int i, len;
650
651 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
652 return -ENOMEM;
653
654 rcu_read_lock();
655 map = rcu_dereference(queue->rps_map);
656 if (map)
657 for (i = 0; i < map->len; i++)
658 cpumask_set_cpu(map->cpus[i], mask);
659
660 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
661 rcu_read_unlock();
662 free_cpumask_var(mask);
663
664 return len < PAGE_SIZE ? len : -EINVAL;
665}
666
667static ssize_t store_rps_map(struct netdev_rx_queue *queue,
668 struct rx_queue_attribute *attribute,
669 const char *buf, size_t len)
670{
671 struct rps_map *old_map, *map;
672 cpumask_var_t mask;
673 int err, cpu, i;
674 static DEFINE_SPINLOCK(rps_map_lock);
675
676 if (!capable(CAP_NET_ADMIN))
677 return -EPERM;
678
679 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
680 return -ENOMEM;
681
682 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
683 if (err) {
684 free_cpumask_var(mask);
685 return err;
686 }
687
688 map = kzalloc(max_t(unsigned int,
689 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
690 GFP_KERNEL);
691 if (!map) {
692 free_cpumask_var(mask);
693 return -ENOMEM;
694 }
695
696 i = 0;
697 for_each_cpu_and(cpu, mask, cpu_online_mask)
698 map->cpus[i++] = cpu;
699
700 if (i)
701 map->len = i;
702 else {
703 kfree(map);
704 map = NULL;
705 }
706
707 spin_lock(&rps_map_lock);
708 old_map = rcu_dereference_protected(queue->rps_map,
709 lockdep_is_held(&rps_map_lock));
710 rcu_assign_pointer(queue->rps_map, map);
711 spin_unlock(&rps_map_lock);
712
713 if (map)
714 static_key_slow_inc(&rps_needed);
715 if (old_map) {
716 kfree_rcu(old_map, rcu);
717 static_key_slow_dec(&rps_needed);
718 }
719 free_cpumask_var(mask);
720 return len;
721}
722
723static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
724 struct rx_queue_attribute *attr,
725 char *buf)
726{
727 struct rps_dev_flow_table *flow_table;
728 unsigned long val = 0;
729
730 rcu_read_lock();
731 flow_table = rcu_dereference(queue->rps_flow_table);
732 if (flow_table)
733 val = (unsigned long)flow_table->mask + 1;
734 rcu_read_unlock();
735
736 return sprintf(buf, "%lu\n", val);
737}
738
739static void rps_dev_flow_table_release(struct rcu_head *rcu)
740{
741 struct rps_dev_flow_table *table = container_of(rcu,
742 struct rps_dev_flow_table, rcu);
743 vfree(table);
744}
745
746static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
747 struct rx_queue_attribute *attr,
748 const char *buf, size_t len)
749{
750 unsigned long mask, count;
751 struct rps_dev_flow_table *table, *old_table;
752 static DEFINE_SPINLOCK(rps_dev_flow_lock);
753 int rc;
754
755 if (!capable(CAP_NET_ADMIN))
756 return -EPERM;
757
758 rc = kstrtoul(buf, 0, &count);
759 if (rc < 0)
760 return rc;
761
762 if (count) {
763 mask = count - 1;
764
765
766
767 while ((mask | (mask >> 1)) != mask)
768 mask |= (mask >> 1);
769
770
771
772
773#if BITS_PER_LONG > 32
774 if (mask > (unsigned long)(u32)mask)
775 return -EINVAL;
776#else
777 if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1))
778 / sizeof(struct rps_dev_flow)) {
779
780 return -EINVAL;
781 }
782#endif
783 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1));
784 if (!table)
785 return -ENOMEM;
786
787 table->mask = mask;
788 for (count = 0; count <= mask; count++)
789 table->flows[count].cpu = RPS_NO_CPU;
790 } else
791 table = NULL;
792
793 spin_lock(&rps_dev_flow_lock);
794 old_table = rcu_dereference_protected(queue->rps_flow_table,
795 lockdep_is_held(&rps_dev_flow_lock));
796 rcu_assign_pointer(queue->rps_flow_table, table);
797 spin_unlock(&rps_dev_flow_lock);
798
799 if (old_table)
800 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
801
802 return len;
803}
804
805static struct rx_queue_attribute rps_cpus_attribute =
806 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
807
808
809static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
810 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
811 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
812#endif
813
814static struct attribute *rx_queue_default_attrs[] = {
815#ifdef CONFIG_RPS
816 &rps_cpus_attribute.attr,
817 &rps_dev_flow_table_cnt_attribute.attr,
818#endif
819 NULL
820};
821
822static void rx_queue_release(struct kobject *kobj)
823{
824 struct netdev_rx_queue *queue = to_rx_queue(kobj);
825#ifdef CONFIG_RPS
826 struct rps_map *map;
827 struct rps_dev_flow_table *flow_table;
828
829
830 map = rcu_dereference_protected(queue->rps_map, 1);
831 if (map) {
832 RCU_INIT_POINTER(queue->rps_map, NULL);
833 kfree_rcu(map, rcu);
834 }
835
836 flow_table = rcu_dereference_protected(queue->rps_flow_table, 1);
837 if (flow_table) {
838 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
839 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
840 }
841#endif
842
843 memset(kobj, 0, sizeof(*kobj));
844 dev_put(queue->dev);
845}
846
847static const void *rx_queue_namespace(struct kobject *kobj)
848{
849 struct netdev_rx_queue *queue = to_rx_queue(kobj);
850 struct device *dev = &queue->dev->dev;
851 const void *ns = NULL;
852
853 if (dev->class && dev->class->ns_type)
854 ns = dev->class->namespace(dev);
855
856 return ns;
857}
858
859static struct kobj_type rx_queue_ktype = {
860 .sysfs_ops = &rx_queue_sysfs_ops,
861 .release = rx_queue_release,
862 .default_attrs = rx_queue_default_attrs,
863 .namespace = rx_queue_namespace
864};
865
866static int rx_queue_add_kobject(struct net_device *dev, int index)
867{
868 struct netdev_rx_queue *queue = dev->_rx + index;
869 struct kobject *kobj = &queue->kobj;
870 int error = 0;
871
872 kobj->kset = dev->queues_kset;
873 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
874 "rx-%u", index);
875 if (error)
876 goto exit;
877
878 if (dev->sysfs_rx_queue_group) {
879 error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group);
880 if (error)
881 goto exit;
882 }
883
884 kobject_uevent(kobj, KOBJ_ADD);
885 dev_hold(queue->dev);
886
887 return error;
888exit:
889 kobject_put(kobj);
890 return error;
891}
892#endif
893
894int
895net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
896{
897#ifdef CONFIG_SYSFS
898 int i;
899 int error = 0;
900
901#ifndef CONFIG_RPS
902 if (!dev->sysfs_rx_queue_group)
903 return 0;
904#endif
905 for (i = old_num; i < new_num; i++) {
906 error = rx_queue_add_kobject(dev, i);
907 if (error) {
908 new_num = old_num;
909 break;
910 }
911 }
912
913 while (--i >= new_num) {
914 if (dev->sysfs_rx_queue_group)
915 sysfs_remove_group(&dev->_rx[i].kobj,
916 dev->sysfs_rx_queue_group);
917 kobject_put(&dev->_rx[i].kobj);
918 }
919
920 return error;
921#else
922 return 0;
923#endif
924}
925
926#ifdef CONFIG_SYSFS
927
928
929
930struct netdev_queue_attribute {
931 struct attribute attr;
932 ssize_t (*show)(struct netdev_queue *queue,
933 struct netdev_queue_attribute *attr, char *buf);
934 ssize_t (*store)(struct netdev_queue *queue,
935 struct netdev_queue_attribute *attr, const char *buf, size_t len);
936};
937#define to_netdev_queue_attr(_attr) container_of(_attr, \
938 struct netdev_queue_attribute, attr)
939
940#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
941
942static ssize_t netdev_queue_attr_show(struct kobject *kobj,
943 struct attribute *attr, char *buf)
944{
945 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
946 struct netdev_queue *queue = to_netdev_queue(kobj);
947
948 if (!attribute->show)
949 return -EIO;
950
951 return attribute->show(queue, attribute, buf);
952}
953
954static ssize_t netdev_queue_attr_store(struct kobject *kobj,
955 struct attribute *attr,
956 const char *buf, size_t count)
957{
958 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
959 struct netdev_queue *queue = to_netdev_queue(kobj);
960
961 if (!attribute->store)
962 return -EIO;
963
964 return attribute->store(queue, attribute, buf, count);
965}
966
967static const struct sysfs_ops netdev_queue_sysfs_ops = {
968 .show = netdev_queue_attr_show,
969 .store = netdev_queue_attr_store,
970};
971
972static ssize_t show_trans_timeout(struct netdev_queue *queue,
973 struct netdev_queue_attribute *attribute,
974 char *buf)
975{
976 unsigned long trans_timeout;
977
978 spin_lock_irq(&queue->_xmit_lock);
979 trans_timeout = queue->trans_timeout;
980 spin_unlock_irq(&queue->_xmit_lock);
981
982 return sprintf(buf, "%lu", trans_timeout);
983}
984
985#ifdef CONFIG_XPS
986static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue)
987{
988 struct net_device *dev = queue->dev;
989 int i;
990
991 for (i = 0; i < dev->num_tx_queues; i++)
992 if (queue == &dev->_tx[i])
993 break;
994
995 BUG_ON(i >= dev->num_tx_queues);
996
997 return i;
998}
999
1000static ssize_t show_tx_maxrate(struct netdev_queue *queue,
1001 struct netdev_queue_attribute *attribute,
1002 char *buf)
1003{
1004 return sprintf(buf, "%lu\n", queue->tx_maxrate);
1005}
1006
1007static ssize_t set_tx_maxrate(struct netdev_queue *queue,
1008 struct netdev_queue_attribute *attribute,
1009 const char *buf, size_t len)
1010{
1011 struct net_device *dev = queue->dev;
1012 int err, index = get_netdev_queue_index(queue);
1013 u32 rate = 0;
1014
1015 err = kstrtou32(buf, 10, &rate);
1016 if (err < 0)
1017 return err;
1018
1019 if (!rtnl_trylock())
1020 return restart_syscall();
1021
1022 err = -EOPNOTSUPP;
1023 if (dev->netdev_ops->ndo_set_tx_maxrate)
1024 err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate);
1025
1026 rtnl_unlock();
1027 if (!err) {
1028 queue->tx_maxrate = rate;
1029 return len;
1030 }
1031 return err;
1032}
1033
1034static struct netdev_queue_attribute queue_tx_maxrate =
1035 __ATTR(tx_maxrate, S_IRUGO | S_IWUSR,
1036 show_tx_maxrate, set_tx_maxrate);
1037#endif
1038
1039static struct netdev_queue_attribute queue_trans_timeout =
1040 __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL);
1041
1042#ifdef CONFIG_BQL
1043
1044
1045
1046static ssize_t bql_show(char *buf, unsigned int value)
1047{
1048 return sprintf(buf, "%u\n", value);
1049}
1050
1051static ssize_t bql_set(const char *buf, const size_t count,
1052 unsigned int *pvalue)
1053{
1054 unsigned int value;
1055 int err;
1056
1057 if (!strcmp(buf, "max") || !strcmp(buf, "max\n"))
1058 value = DQL_MAX_LIMIT;
1059 else {
1060 err = kstrtouint(buf, 10, &value);
1061 if (err < 0)
1062 return err;
1063 if (value > DQL_MAX_LIMIT)
1064 return -EINVAL;
1065 }
1066
1067 *pvalue = value;
1068
1069 return count;
1070}
1071
1072static ssize_t bql_show_hold_time(struct netdev_queue *queue,
1073 struct netdev_queue_attribute *attr,
1074 char *buf)
1075{
1076 struct dql *dql = &queue->dql;
1077
1078 return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time));
1079}
1080
1081static ssize_t bql_set_hold_time(struct netdev_queue *queue,
1082 struct netdev_queue_attribute *attribute,
1083 const char *buf, size_t len)
1084{
1085 struct dql *dql = &queue->dql;
1086 unsigned int value;
1087 int err;
1088
1089 err = kstrtouint(buf, 10, &value);
1090 if (err < 0)
1091 return err;
1092
1093 dql->slack_hold_time = msecs_to_jiffies(value);
1094
1095 return len;
1096}
1097
1098static struct netdev_queue_attribute bql_hold_time_attribute =
1099 __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time,
1100 bql_set_hold_time);
1101
1102static ssize_t bql_show_inflight(struct netdev_queue *queue,
1103 struct netdev_queue_attribute *attr,
1104 char *buf)
1105{
1106 struct dql *dql = &queue->dql;
1107
1108 return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed);
1109}
1110
1111static struct netdev_queue_attribute bql_inflight_attribute =
1112 __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL);
1113
1114#define BQL_ATTR(NAME, FIELD) \
1115static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \
1116 struct netdev_queue_attribute *attr, \
1117 char *buf) \
1118{ \
1119 return bql_show(buf, queue->dql.FIELD); \
1120} \
1121 \
1122static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \
1123 struct netdev_queue_attribute *attr, \
1124 const char *buf, size_t len) \
1125{ \
1126 return bql_set(buf, len, &queue->dql.FIELD); \
1127} \
1128 \
1129static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \
1130 __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \
1131 bql_set_ ## NAME);
1132
1133BQL_ATTR(limit, limit)
1134BQL_ATTR(limit_max, max_limit)
1135BQL_ATTR(limit_min, min_limit)
1136
1137static struct attribute *dql_attrs[] = {
1138 &bql_limit_attribute.attr,
1139 &bql_limit_max_attribute.attr,
1140 &bql_limit_min_attribute.attr,
1141 &bql_hold_time_attribute.attr,
1142 &bql_inflight_attribute.attr,
1143 NULL
1144};
1145
1146static struct attribute_group dql_group = {
1147 .name = "byte_queue_limits",
1148 .attrs = dql_attrs,
1149};
1150#endif
1151
1152#ifdef CONFIG_XPS
1153static ssize_t show_xps_map(struct netdev_queue *queue,
1154 struct netdev_queue_attribute *attribute, char *buf)
1155{
1156 struct net_device *dev = queue->dev;
1157 struct xps_dev_maps *dev_maps;
1158 cpumask_var_t mask;
1159 unsigned long index;
1160 int i, len;
1161
1162 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
1163 return -ENOMEM;
1164
1165 index = get_netdev_queue_index(queue);
1166
1167 rcu_read_lock();
1168 dev_maps = rcu_dereference(dev->xps_maps);
1169 if (dev_maps) {
1170 for_each_possible_cpu(i) {
1171 struct xps_map *map =
1172 rcu_dereference(dev_maps->cpu_map[i]);
1173 if (map) {
1174 int j;
1175 for (j = 0; j < map->len; j++) {
1176 if (map->queues[j] == index) {
1177 cpumask_set_cpu(i, mask);
1178 break;
1179 }
1180 }
1181 }
1182 }
1183 }
1184 rcu_read_unlock();
1185
1186 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
1187 free_cpumask_var(mask);
1188 return len < PAGE_SIZE ? len : -EINVAL;
1189}
1190
1191static ssize_t store_xps_map(struct netdev_queue *queue,
1192 struct netdev_queue_attribute *attribute,
1193 const char *buf, size_t len)
1194{
1195 struct net_device *dev = queue->dev;
1196 unsigned long index;
1197 cpumask_var_t mask;
1198 int err;
1199
1200 if (!capable(CAP_NET_ADMIN))
1201 return -EPERM;
1202
1203 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
1204 return -ENOMEM;
1205
1206 index = get_netdev_queue_index(queue);
1207
1208 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
1209 if (err) {
1210 free_cpumask_var(mask);
1211 return err;
1212 }
1213
1214 err = netif_set_xps_queue(dev, mask, index);
1215
1216 free_cpumask_var(mask);
1217
1218 return err ? : len;
1219}
1220
1221static struct netdev_queue_attribute xps_cpus_attribute =
1222 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
1223#endif
1224
1225static struct attribute *netdev_queue_default_attrs[] = {
1226 &queue_trans_timeout.attr,
1227#ifdef CONFIG_XPS
1228 &xps_cpus_attribute.attr,
1229 &queue_tx_maxrate.attr,
1230#endif
1231 NULL
1232};
1233
1234static void netdev_queue_release(struct kobject *kobj)
1235{
1236 struct netdev_queue *queue = to_netdev_queue(kobj);
1237
1238 memset(kobj, 0, sizeof(*kobj));
1239 dev_put(queue->dev);
1240}
1241
1242static const void *netdev_queue_namespace(struct kobject *kobj)
1243{
1244 struct netdev_queue *queue = to_netdev_queue(kobj);
1245 struct device *dev = &queue->dev->dev;
1246 const void *ns = NULL;
1247
1248 if (dev->class && dev->class->ns_type)
1249 ns = dev->class->namespace(dev);
1250
1251 return ns;
1252}
1253
1254static struct kobj_type netdev_queue_ktype = {
1255 .sysfs_ops = &netdev_queue_sysfs_ops,
1256 .release = netdev_queue_release,
1257 .default_attrs = netdev_queue_default_attrs,
1258 .namespace = netdev_queue_namespace,
1259};
1260
1261static int netdev_queue_add_kobject(struct net_device *dev, int index)
1262{
1263 struct netdev_queue *queue = dev->_tx + index;
1264 struct kobject *kobj = &queue->kobj;
1265 int error = 0;
1266
1267 kobj->kset = dev->queues_kset;
1268 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1269 "tx-%u", index);
1270 if (error)
1271 goto exit;
1272
1273#ifdef CONFIG_BQL
1274 error = sysfs_create_group(kobj, &dql_group);
1275 if (error)
1276 goto exit;
1277#endif
1278
1279 kobject_uevent(kobj, KOBJ_ADD);
1280 dev_hold(queue->dev);
1281
1282 return 0;
1283exit:
1284 kobject_put(kobj);
1285 return error;
1286}
1287#endif
1288
1289int
1290netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
1291{
1292#ifdef CONFIG_SYSFS
1293 int i;
1294 int error = 0;
1295
1296 for (i = old_num; i < new_num; i++) {
1297 error = netdev_queue_add_kobject(dev, i);
1298 if (error) {
1299 new_num = old_num;
1300 break;
1301 }
1302 }
1303
1304 while (--i >= new_num) {
1305 struct netdev_queue *queue = dev->_tx + i;
1306
1307#ifdef CONFIG_BQL
1308 sysfs_remove_group(&queue->kobj, &dql_group);
1309#endif
1310 kobject_put(&queue->kobj);
1311 }
1312
1313 return error;
1314#else
1315 return 0;
1316#endif
1317}
1318
1319static int register_queue_kobjects(struct net_device *dev)
1320{
1321 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
1322
1323#ifdef CONFIG_SYSFS
1324 dev->queues_kset = kset_create_and_add("queues",
1325 NULL, &dev->dev.kobj);
1326 if (!dev->queues_kset)
1327 return -ENOMEM;
1328 real_rx = dev->real_num_rx_queues;
1329#endif
1330 real_tx = dev->real_num_tx_queues;
1331
1332 error = net_rx_queue_update_kobjects(dev, 0, real_rx);
1333 if (error)
1334 goto error;
1335 rxq = real_rx;
1336
1337 error = netdev_queue_update_kobjects(dev, 0, real_tx);
1338 if (error)
1339 goto error;
1340 txq = real_tx;
1341
1342 return 0;
1343
1344error:
1345 netdev_queue_update_kobjects(dev, txq, 0);
1346 net_rx_queue_update_kobjects(dev, rxq, 0);
1347 return error;
1348}
1349
1350static void remove_queue_kobjects(struct net_device *dev)
1351{
1352 int real_rx = 0, real_tx = 0;
1353
1354#ifdef CONFIG_SYSFS
1355 real_rx = dev->real_num_rx_queues;
1356#endif
1357 real_tx = dev->real_num_tx_queues;
1358
1359 net_rx_queue_update_kobjects(dev, real_rx, 0);
1360 netdev_queue_update_kobjects(dev, real_tx, 0);
1361#ifdef CONFIG_SYSFS
1362 kset_unregister(dev->queues_kset);
1363#endif
1364}
1365
1366static bool net_current_may_mount(void)
1367{
1368 struct net *net = current->nsproxy->net_ns;
1369
1370 return ns_capable(net->user_ns, CAP_SYS_ADMIN);
1371}
1372
1373static void *net_grab_current_ns(void)
1374{
1375 struct net *ns = current->nsproxy->net_ns;
1376#ifdef CONFIG_NET_NS
1377 if (ns)
1378 atomic_inc(&ns->passive);
1379#endif
1380 return ns;
1381}
1382
1383static const void *net_initial_ns(void)
1384{
1385 return &init_net;
1386}
1387
1388static const void *net_netlink_ns(struct sock *sk)
1389{
1390 return sock_net(sk);
1391}
1392
1393struct kobj_ns_type_operations net_ns_type_operations = {
1394 .type = KOBJ_NS_TYPE_NET,
1395 .current_may_mount = net_current_may_mount,
1396 .grab_current_ns = net_grab_current_ns,
1397 .netlink_ns = net_netlink_ns,
1398 .initial_ns = net_initial_ns,
1399 .drop_ns = net_drop_ns,
1400};
1401EXPORT_SYMBOL_GPL(net_ns_type_operations);
1402
1403static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
1404{
1405 struct net_device *dev = to_net_dev(d);
1406 int retval;
1407
1408
1409 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
1410 if (retval)
1411 goto exit;
1412
1413
1414
1415
1416 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1417
1418exit:
1419 return retval;
1420}
1421
1422
1423
1424
1425
1426static void netdev_release(struct device *d)
1427{
1428 struct net_device *dev = to_net_dev(d);
1429
1430 BUG_ON(dev->reg_state != NETREG_RELEASED);
1431
1432 kfree(dev->ifalias);
1433 netdev_freemem(dev);
1434}
1435
1436static const void *net_namespace(struct device *d)
1437{
1438 struct net_device *dev;
1439 dev = container_of(d, struct net_device, dev);
1440 return dev_net(dev);
1441}
1442
1443static struct class net_class = {
1444 .name = "net",
1445 .dev_release = netdev_release,
1446 .dev_groups = net_class_groups,
1447 .dev_uevent = netdev_uevent,
1448 .ns_type = &net_ns_type_operations,
1449 .namespace = net_namespace,
1450};
1451
1452#ifdef CONFIG_OF_NET
1453static int of_dev_node_match(struct device *dev, const void *data)
1454{
1455 int ret = 0;
1456
1457 if (dev->parent)
1458 ret = dev->parent->of_node == data;
1459
1460 return ret == 0 ? dev->of_node == data : ret;
1461}
1462
1463struct net_device *of_find_net_device_by_node(struct device_node *np)
1464{
1465 struct device *dev;
1466
1467 dev = class_find_device(&net_class, NULL, np, of_dev_node_match);
1468 if (!dev)
1469 return NULL;
1470
1471 return to_net_dev(dev);
1472}
1473EXPORT_SYMBOL(of_find_net_device_by_node);
1474#endif
1475
1476
1477
1478
1479void netdev_unregister_kobject(struct net_device *ndev)
1480{
1481 struct device *dev = &(ndev->dev);
1482
1483 kobject_get(&dev->kobj);
1484
1485 remove_queue_kobjects(ndev);
1486
1487 pm_runtime_set_memalloc_noio(dev, false);
1488
1489 device_del(dev);
1490}
1491
1492
1493int netdev_register_kobject(struct net_device *ndev)
1494{
1495 struct device *dev = &(ndev->dev);
1496 const struct attribute_group **groups = ndev->sysfs_groups;
1497 int error = 0;
1498
1499 device_initialize(dev);
1500 dev->class = &net_class;
1501 dev->platform_data = ndev;
1502 dev->groups = groups;
1503
1504 dev_set_name(dev, "%s", ndev->name);
1505
1506#ifdef CONFIG_SYSFS
1507
1508 if (*groups)
1509 groups++;
1510
1511 *groups++ = &netstat_group;
1512
1513#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
1514 if (ndev->ieee80211_ptr)
1515 *groups++ = &wireless_group;
1516#if IS_ENABLED(CONFIG_WIRELESS_EXT)
1517 else if (ndev->wireless_handlers)
1518 *groups++ = &wireless_group;
1519#endif
1520#endif
1521#endif
1522
1523 error = device_add(dev);
1524 if (error)
1525 return error;
1526
1527 error = register_queue_kobjects(ndev);
1528 if (error) {
1529 device_del(dev);
1530 return error;
1531 }
1532
1533 pm_runtime_set_memalloc_noio(dev, true);
1534
1535 return error;
1536}
1537
1538int netdev_class_create_file_ns(struct class_attribute *class_attr,
1539 const void *ns)
1540{
1541 return class_create_file_ns(&net_class, class_attr, ns);
1542}
1543EXPORT_SYMBOL(netdev_class_create_file_ns);
1544
1545void netdev_class_remove_file_ns(struct class_attribute *class_attr,
1546 const void *ns)
1547{
1548 class_remove_file_ns(&net_class, class_attr, ns);
1549}
1550EXPORT_SYMBOL(netdev_class_remove_file_ns);
1551
1552int __init netdev_kobject_init(void)
1553{
1554 kobj_ns_type_register(&net_ns_type_operations);
1555 return class_register(&net_class);
1556}
1557
