1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * net-sysfs.c - network device class and attributes
5 * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
8 #include <linux/capability.h>
9 #include <linux/kernel.h>
10 #include <linux/netdevice.h>
11 #include <linux/if_arp.h>
12 #include <linux/slab.h>
13 #include <linux/sched/signal.h>
14 #include <linux/nsproxy.h>
16 #include <net/net_namespace.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/vmalloc.h>
19 #include <linux/export.h>
20 #include <linux/jiffies.h>
21 #include <linux/pm_runtime.h>
23 #include <linux/of_net.h>
24 #include <linux/cpu.h>
26 #include "net-sysfs.h"
29 static const char fmt_hex[] = "%#x\n";
30 static const char fmt_dec[] = "%d\n";
31 static const char fmt_ulong[] = "%lu\n";
32 static const char fmt_u64[] = "%llu\n";
34 static inline int dev_isalive(const struct net_device *dev)
36 return dev->reg_state <= NETREG_REGISTERED;
39 /* use same locking rules as GIF* ioctl's */
40 static ssize_t netdev_show(const struct device *dev,
41 struct device_attribute *attr, char *buf,
42 ssize_t (*format)(const struct net_device *, char *))
44 struct net_device *ndev = to_net_dev(dev);
45 ssize_t ret = -EINVAL;
47 read_lock(&dev_base_lock);
48 if (dev_isalive(ndev))
49 ret = (*format)(ndev, buf);
50 read_unlock(&dev_base_lock);
55 /* generate a show function for simple field */
56 #define NETDEVICE_SHOW(field, format_string) \
57 static ssize_t format_##field(const struct net_device *dev, char *buf) \
59 return sprintf(buf, format_string, dev->field); \
61 static ssize_t field##_show(struct device *dev, \
62 struct device_attribute *attr, char *buf) \
64 return netdev_show(dev, attr, buf, format_##field); \
67 #define NETDEVICE_SHOW_RO(field, format_string) \
68 NETDEVICE_SHOW(field, format_string); \
69 static DEVICE_ATTR_RO(field)
71 #define NETDEVICE_SHOW_RW(field, format_string) \
72 NETDEVICE_SHOW(field, format_string); \
73 static DEVICE_ATTR_RW(field)
75 /* use same locking and permission rules as SIF* ioctl's */
76 static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
77 const char *buf, size_t len,
78 int (*set)(struct net_device *, unsigned long))
80 struct net_device *netdev = to_net_dev(dev);
81 struct net *net = dev_net(netdev);
85 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
88 ret = kstrtoul(buf, 0, &new);
93 return restart_syscall();
95 if (dev_isalive(netdev)) {
96 ret = (*set)(netdev, new);
105 NETDEVICE_SHOW_RO(dev_id, fmt_hex);
106 NETDEVICE_SHOW_RO(dev_port, fmt_dec);
107 NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
108 NETDEVICE_SHOW_RO(addr_len, fmt_dec);
109 NETDEVICE_SHOW_RO(ifindex, fmt_dec);
110 NETDEVICE_SHOW_RO(type, fmt_dec);
111 NETDEVICE_SHOW_RO(link_mode, fmt_dec);
113 static ssize_t iflink_show(struct device *dev, struct device_attribute *attr,
116 struct net_device *ndev = to_net_dev(dev);
118 return sprintf(buf, fmt_dec, dev_get_iflink(ndev));
120 static DEVICE_ATTR_RO(iflink);
122 static ssize_t format_name_assign_type(const struct net_device *dev, char *buf)
124 return sprintf(buf, fmt_dec, dev->name_assign_type);
127 static ssize_t name_assign_type_show(struct device *dev,
128 struct device_attribute *attr,
131 struct net_device *ndev = to_net_dev(dev);
132 ssize_t ret = -EINVAL;
134 if (ndev->name_assign_type != NET_NAME_UNKNOWN)
135 ret = netdev_show(dev, attr, buf, format_name_assign_type);
139 static DEVICE_ATTR_RO(name_assign_type);
141 /* use same locking rules as GIFHWADDR ioctl's */
142 static ssize_t address_show(struct device *dev, struct device_attribute *attr,
145 struct net_device *ndev = to_net_dev(dev);
146 ssize_t ret = -EINVAL;
148 read_lock(&dev_base_lock);
149 if (dev_isalive(ndev))
150 ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len);
151 read_unlock(&dev_base_lock);
154 static DEVICE_ATTR_RO(address);
156 static ssize_t broadcast_show(struct device *dev,
157 struct device_attribute *attr, char *buf)
159 struct net_device *ndev = to_net_dev(dev);
161 if (dev_isalive(ndev))
162 return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len);
165 static DEVICE_ATTR_RO(broadcast);
167 static int change_carrier(struct net_device *dev, unsigned long new_carrier)
169 if (!netif_running(dev))
171 return dev_change_carrier(dev, (bool)new_carrier);
174 static ssize_t carrier_store(struct device *dev, struct device_attribute *attr,
175 const char *buf, size_t len)
177 struct net_device *netdev = to_net_dev(dev);
179 /* The check is also done in change_carrier; this helps returning early
180 * without hitting the trylock/restart in netdev_store.
182 if (!netdev->netdev_ops->ndo_change_carrier)
185 return netdev_store(dev, attr, buf, len, change_carrier);
188 static ssize_t carrier_show(struct device *dev,
189 struct device_attribute *attr, char *buf)
191 struct net_device *netdev = to_net_dev(dev);
193 if (netif_running(netdev))
194 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
198 static DEVICE_ATTR_RW(carrier);
200 static ssize_t speed_show(struct device *dev,
201 struct device_attribute *attr, char *buf)
203 struct net_device *netdev = to_net_dev(dev);
206 /* The check is also done in __ethtool_get_link_ksettings; this helps
207 * returning early without hitting the trylock/restart below.
209 if (!netdev->ethtool_ops->get_link_ksettings)
213 return restart_syscall();
215 if (netif_running(netdev) && netif_device_present(netdev)) {
216 struct ethtool_link_ksettings cmd;
218 if (!__ethtool_get_link_ksettings(netdev, &cmd))
219 ret = sprintf(buf, fmt_dec, cmd.base.speed);
224 static DEVICE_ATTR_RO(speed);
226 static ssize_t duplex_show(struct device *dev,
227 struct device_attribute *attr, char *buf)
229 struct net_device *netdev = to_net_dev(dev);
232 /* The check is also done in __ethtool_get_link_ksettings; this helps
233 * returning early without hitting the trylock/restart below.
235 if (!netdev->ethtool_ops->get_link_ksettings)
239 return restart_syscall();
241 if (netif_running(netdev)) {
242 struct ethtool_link_ksettings cmd;
244 if (!__ethtool_get_link_ksettings(netdev, &cmd)) {
247 switch (cmd.base.duplex) {
258 ret = sprintf(buf, "%s\n", duplex);
264 static DEVICE_ATTR_RO(duplex);
266 static ssize_t dormant_show(struct device *dev,
267 struct device_attribute *attr, char *buf)
269 struct net_device *netdev = to_net_dev(dev);
271 if (netif_running(netdev))
272 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
276 static DEVICE_ATTR_RO(dormant);
278 static const char *const operstates[] = {
280 "notpresent", /* currently unused */
283 "testing", /* currently unused */
288 static ssize_t operstate_show(struct device *dev,
289 struct device_attribute *attr, char *buf)
291 const struct net_device *netdev = to_net_dev(dev);
292 unsigned char operstate;
294 read_lock(&dev_base_lock);
295 operstate = netdev->operstate;
296 if (!netif_running(netdev))
297 operstate = IF_OPER_DOWN;
298 read_unlock(&dev_base_lock);
300 if (operstate >= ARRAY_SIZE(operstates))
301 return -EINVAL; /* should not happen */
303 return sprintf(buf, "%s\n", operstates[operstate]);
305 static DEVICE_ATTR_RO(operstate);
307 static ssize_t carrier_changes_show(struct device *dev,
308 struct device_attribute *attr,
311 struct net_device *netdev = to_net_dev(dev);
313 return sprintf(buf, fmt_dec,
314 atomic_read(&netdev->carrier_up_count) +
315 atomic_read(&netdev->carrier_down_count));
317 static DEVICE_ATTR_RO(carrier_changes);
319 static ssize_t carrier_up_count_show(struct device *dev,
320 struct device_attribute *attr,
323 struct net_device *netdev = to_net_dev(dev);
325 return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_up_count));
327 static DEVICE_ATTR_RO(carrier_up_count);
329 static ssize_t carrier_down_count_show(struct device *dev,
330 struct device_attribute *attr,
333 struct net_device *netdev = to_net_dev(dev);
335 return sprintf(buf, fmt_dec, atomic_read(&netdev->carrier_down_count));
337 static DEVICE_ATTR_RO(carrier_down_count);
339 /* read-write attributes */
341 static int change_mtu(struct net_device *dev, unsigned long new_mtu)
343 return dev_set_mtu(dev, (int)new_mtu);
346 static ssize_t mtu_store(struct device *dev, struct device_attribute *attr,
347 const char *buf, size_t len)
349 return netdev_store(dev, attr, buf, len, change_mtu);
351 NETDEVICE_SHOW_RW(mtu, fmt_dec);
353 static int change_flags(struct net_device *dev, unsigned long new_flags)
355 return dev_change_flags(dev, (unsigned int)new_flags, NULL);
358 static ssize_t flags_store(struct device *dev, struct device_attribute *attr,
359 const char *buf, size_t len)
361 return netdev_store(dev, attr, buf, len, change_flags);
363 NETDEVICE_SHOW_RW(flags, fmt_hex);
365 static ssize_t tx_queue_len_store(struct device *dev,
366 struct device_attribute *attr,
367 const char *buf, size_t len)
369 if (!capable(CAP_NET_ADMIN))
372 return netdev_store(dev, attr, buf, len, dev_change_tx_queue_len);
374 NETDEVICE_SHOW_RW(tx_queue_len, fmt_dec);
376 static int change_gro_flush_timeout(struct net_device *dev, unsigned long val)
378 dev->gro_flush_timeout = val;
382 static ssize_t gro_flush_timeout_store(struct device *dev,
383 struct device_attribute *attr,
384 const char *buf, size_t len)
386 if (!capable(CAP_NET_ADMIN))
389 return netdev_store(dev, attr, buf, len, change_gro_flush_timeout);
391 NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong);
393 static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr,
394 const char *buf, size_t len)
396 struct net_device *netdev = to_net_dev(dev);
397 struct net *net = dev_net(netdev);
401 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
404 /* ignore trailing newline */
405 if (len > 0 && buf[len - 1] == '\n')
409 return restart_syscall();
411 if (dev_isalive(netdev)) {
412 ret = dev_set_alias(netdev, buf, count);
416 netdev_state_change(netdev);
424 static ssize_t ifalias_show(struct device *dev,
425 struct device_attribute *attr, char *buf)
427 const struct net_device *netdev = to_net_dev(dev);
431 ret = dev_get_alias(netdev, tmp, sizeof(tmp));
433 ret = sprintf(buf, "%s\n", tmp);
436 static DEVICE_ATTR_RW(ifalias);
438 static int change_group(struct net_device *dev, unsigned long new_group)
440 dev_set_group(dev, (int)new_group);
444 static ssize_t group_store(struct device *dev, struct device_attribute *attr,
445 const char *buf, size_t len)
447 return netdev_store(dev, attr, buf, len, change_group);
449 NETDEVICE_SHOW(group, fmt_dec);
450 static DEVICE_ATTR(netdev_group, 0644, group_show, group_store);
452 static int change_proto_down(struct net_device *dev, unsigned long proto_down)
454 return dev_change_proto_down(dev, (bool)proto_down);
457 static ssize_t proto_down_store(struct device *dev,
458 struct device_attribute *attr,
459 const char *buf, size_t len)
461 struct net_device *netdev = to_net_dev(dev);
463 /* The check is also done in change_proto_down; this helps returning
464 * early without hitting the trylock/restart in netdev_store.
466 if (!netdev->netdev_ops->ndo_change_proto_down)
469 return netdev_store(dev, attr, buf, len, change_proto_down);
471 NETDEVICE_SHOW_RW(proto_down, fmt_dec);
473 static ssize_t phys_port_id_show(struct device *dev,
474 struct device_attribute *attr, char *buf)
476 struct net_device *netdev = to_net_dev(dev);
477 ssize_t ret = -EINVAL;
479 /* The check is also done in dev_get_phys_port_id; this helps returning
480 * early without hitting the trylock/restart below.
482 if (!netdev->netdev_ops->ndo_get_phys_port_id)
486 return restart_syscall();
488 if (dev_isalive(netdev)) {
489 struct netdev_phys_item_id ppid;
491 ret = dev_get_phys_port_id(netdev, &ppid);
493 ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
499 static DEVICE_ATTR_RO(phys_port_id);
501 static ssize_t phys_port_name_show(struct device *dev,
502 struct device_attribute *attr, char *buf)
504 struct net_device *netdev = to_net_dev(dev);
505 ssize_t ret = -EINVAL;
507 /* The checks are also done in dev_get_phys_port_name; this helps
508 * returning early without hitting the trylock/restart below.
510 if (!netdev->netdev_ops->ndo_get_phys_port_name &&
511 !netdev->netdev_ops->ndo_get_devlink_port)
515 return restart_syscall();
517 if (dev_isalive(netdev)) {
520 ret = dev_get_phys_port_name(netdev, name, sizeof(name));
522 ret = sprintf(buf, "%s\n", name);
528 static DEVICE_ATTR_RO(phys_port_name);
530 static ssize_t phys_switch_id_show(struct device *dev,
531 struct device_attribute *attr, char *buf)
533 struct net_device *netdev = to_net_dev(dev);
534 ssize_t ret = -EINVAL;
536 /* The checks are also done in dev_get_phys_port_name; this helps
537 * returning early without hitting the trylock/restart below. This works
538 * because recurse is false when calling dev_get_port_parent_id.
540 if (!netdev->netdev_ops->ndo_get_port_parent_id &&
541 !netdev->netdev_ops->ndo_get_devlink_port)
545 return restart_syscall();
547 if (dev_isalive(netdev)) {
548 struct netdev_phys_item_id ppid = { };
550 ret = dev_get_port_parent_id(netdev, &ppid, false);
552 ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
558 static DEVICE_ATTR_RO(phys_switch_id);
560 static struct attribute *net_class_attrs[] __ro_after_init = {
561 &dev_attr_netdev_group.attr,
563 &dev_attr_dev_id.attr,
564 &dev_attr_dev_port.attr,
565 &dev_attr_iflink.attr,
566 &dev_attr_ifindex.attr,
567 &dev_attr_name_assign_type.attr,
568 &dev_attr_addr_assign_type.attr,
569 &dev_attr_addr_len.attr,
570 &dev_attr_link_mode.attr,
571 &dev_attr_address.attr,
572 &dev_attr_broadcast.attr,
573 &dev_attr_speed.attr,
574 &dev_attr_duplex.attr,
575 &dev_attr_dormant.attr,
576 &dev_attr_operstate.attr,
577 &dev_attr_carrier_changes.attr,
578 &dev_attr_ifalias.attr,
579 &dev_attr_carrier.attr,
581 &dev_attr_flags.attr,
582 &dev_attr_tx_queue_len.attr,
583 &dev_attr_gro_flush_timeout.attr,
584 &dev_attr_phys_port_id.attr,
585 &dev_attr_phys_port_name.attr,
586 &dev_attr_phys_switch_id.attr,
587 &dev_attr_proto_down.attr,
588 &dev_attr_carrier_up_count.attr,
589 &dev_attr_carrier_down_count.attr,
592 ATTRIBUTE_GROUPS(net_class);
594 /* Show a given an attribute in the statistics group */
595 static ssize_t netstat_show(const struct device *d,
596 struct device_attribute *attr, char *buf,
597 unsigned long offset)
599 struct net_device *dev = to_net_dev(d);
600 ssize_t ret = -EINVAL;
602 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
603 offset % sizeof(u64) != 0);
605 read_lock(&dev_base_lock);
606 if (dev_isalive(dev)) {
607 struct rtnl_link_stats64 temp;
608 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
610 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *)stats) + offset));
612 read_unlock(&dev_base_lock);
616 /* generate a read-only statistics attribute */
617 #define NETSTAT_ENTRY(name) \
618 static ssize_t name##_show(struct device *d, \
619 struct device_attribute *attr, char *buf) \
621 return netstat_show(d, attr, buf, \
622 offsetof(struct rtnl_link_stats64, name)); \
624 static DEVICE_ATTR_RO(name)
626 NETSTAT_ENTRY(rx_packets);
627 NETSTAT_ENTRY(tx_packets);
628 NETSTAT_ENTRY(rx_bytes);
629 NETSTAT_ENTRY(tx_bytes);
630 NETSTAT_ENTRY(rx_errors);
631 NETSTAT_ENTRY(tx_errors);
632 NETSTAT_ENTRY(rx_dropped);
633 NETSTAT_ENTRY(tx_dropped);
634 NETSTAT_ENTRY(multicast);
635 NETSTAT_ENTRY(collisions);
636 NETSTAT_ENTRY(rx_length_errors);
637 NETSTAT_ENTRY(rx_over_errors);
638 NETSTAT_ENTRY(rx_crc_errors);
639 NETSTAT_ENTRY(rx_frame_errors);
640 NETSTAT_ENTRY(rx_fifo_errors);
641 NETSTAT_ENTRY(rx_missed_errors);
642 NETSTAT_ENTRY(tx_aborted_errors);
643 NETSTAT_ENTRY(tx_carrier_errors);
644 NETSTAT_ENTRY(tx_fifo_errors);
645 NETSTAT_ENTRY(tx_heartbeat_errors);
646 NETSTAT_ENTRY(tx_window_errors);
647 NETSTAT_ENTRY(rx_compressed);
648 NETSTAT_ENTRY(tx_compressed);
649 NETSTAT_ENTRY(rx_nohandler);
651 static struct attribute *netstat_attrs[] __ro_after_init = {
652 &dev_attr_rx_packets.attr,
653 &dev_attr_tx_packets.attr,
654 &dev_attr_rx_bytes.attr,
655 &dev_attr_tx_bytes.attr,
656 &dev_attr_rx_errors.attr,
657 &dev_attr_tx_errors.attr,
658 &dev_attr_rx_dropped.attr,
659 &dev_attr_tx_dropped.attr,
660 &dev_attr_multicast.attr,
661 &dev_attr_collisions.attr,
662 &dev_attr_rx_length_errors.attr,
663 &dev_attr_rx_over_errors.attr,
664 &dev_attr_rx_crc_errors.attr,
665 &dev_attr_rx_frame_errors.attr,
666 &dev_attr_rx_fifo_errors.attr,
667 &dev_attr_rx_missed_errors.attr,
668 &dev_attr_tx_aborted_errors.attr,
669 &dev_attr_tx_carrier_errors.attr,
670 &dev_attr_tx_fifo_errors.attr,
671 &dev_attr_tx_heartbeat_errors.attr,
672 &dev_attr_tx_window_errors.attr,
673 &dev_attr_rx_compressed.attr,
674 &dev_attr_tx_compressed.attr,
675 &dev_attr_rx_nohandler.attr,
679 static const struct attribute_group netstat_group = {
680 .name = "statistics",
681 .attrs = netstat_attrs,
684 #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
685 static struct attribute *wireless_attrs[] = {
689 static const struct attribute_group wireless_group = {
691 .attrs = wireless_attrs,
695 #else /* CONFIG_SYSFS */
696 #define net_class_groups NULL
697 #endif /* CONFIG_SYSFS */
700 #define to_rx_queue_attr(_attr) \
701 container_of(_attr, struct rx_queue_attribute, attr)
703 #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
705 static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
708 const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
709 struct netdev_rx_queue *queue = to_rx_queue(kobj);
711 if (!attribute->show)
714 return attribute->show(queue, buf);
717 static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
718 const char *buf, size_t count)
720 const struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
721 struct netdev_rx_queue *queue = to_rx_queue(kobj);
723 if (!attribute->store)
726 return attribute->store(queue, buf, count);
729 static const struct sysfs_ops rx_queue_sysfs_ops = {
730 .show = rx_queue_attr_show,
731 .store = rx_queue_attr_store,
735 static ssize_t show_rps_map(struct netdev_rx_queue *queue, char *buf)
741 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
745 map = rcu_dereference(queue->rps_map);
747 for (i = 0; i < map->len; i++)
748 cpumask_set_cpu(map->cpus[i], mask);
750 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
752 free_cpumask_var(mask);
754 return len < PAGE_SIZE ? len : -EINVAL;
757 static ssize_t store_rps_map(struct netdev_rx_queue *queue,
758 const char *buf, size_t len)
760 struct rps_map *old_map, *map;
763 static DEFINE_MUTEX(rps_map_mutex);
765 if (!capable(CAP_NET_ADMIN))
768 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
771 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
773 free_cpumask_var(mask);
777 map = kzalloc(max_t(unsigned int,
778 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
781 free_cpumask_var(mask);
786 for_each_cpu_and(cpu, mask, cpu_online_mask)
787 map->cpus[i++] = cpu;
796 mutex_lock(&rps_map_mutex);
797 old_map = rcu_dereference_protected(queue->rps_map,
798 mutex_is_locked(&rps_map_mutex));
799 rcu_assign_pointer(queue->rps_map, map);
802 static_branch_inc(&rps_needed);
804 static_branch_dec(&rps_needed);
806 mutex_unlock(&rps_map_mutex);
809 kfree_rcu(old_map, rcu);
811 free_cpumask_var(mask);
815 static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
818 struct rps_dev_flow_table *flow_table;
819 unsigned long val = 0;
822 flow_table = rcu_dereference(queue->rps_flow_table);
824 val = (unsigned long)flow_table->mask + 1;
827 return sprintf(buf, "%lu\n", val);
830 static void rps_dev_flow_table_release(struct rcu_head *rcu)
832 struct rps_dev_flow_table *table = container_of(rcu,
833 struct rps_dev_flow_table, rcu);
837 static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
838 const char *buf, size_t len)
840 unsigned long mask, count;
841 struct rps_dev_flow_table *table, *old_table;
842 static DEFINE_SPINLOCK(rps_dev_flow_lock);
845 if (!capable(CAP_NET_ADMIN))
848 rc = kstrtoul(buf, 0, &count);
854 /* mask = roundup_pow_of_two(count) - 1;
855 * without overflows...
857 while ((mask | (mask >> 1)) != mask)
859 /* On 64 bit arches, must check mask fits in table->mask (u32),
860 * and on 32bit arches, must check
861 * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow.
863 #if BITS_PER_LONG > 32
864 if (mask > (unsigned long)(u32)mask)
867 if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1))
868 / sizeof(struct rps_dev_flow)) {
869 /* Enforce a limit to prevent overflow */
873 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1));
878 for (count = 0; count <= mask; count++)
879 table->flows[count].cpu = RPS_NO_CPU;
884 spin_lock(&rps_dev_flow_lock);
885 old_table = rcu_dereference_protected(queue->rps_flow_table,
886 lockdep_is_held(&rps_dev_flow_lock));
887 rcu_assign_pointer(queue->rps_flow_table, table);
888 spin_unlock(&rps_dev_flow_lock);
891 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
896 static struct rx_queue_attribute rps_cpus_attribute __ro_after_init
897 = __ATTR(rps_cpus, 0644, show_rps_map, store_rps_map);
899 static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute __ro_after_init
900 = __ATTR(rps_flow_cnt, 0644,
901 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
902 #endif /* CONFIG_RPS */
904 static struct attribute *rx_queue_default_attrs[] __ro_after_init = {
906 &rps_cpus_attribute.attr,
907 &rps_dev_flow_table_cnt_attribute.attr,
911 ATTRIBUTE_GROUPS(rx_queue_default);
913 static void rx_queue_release(struct kobject *kobj)
915 struct netdev_rx_queue *queue = to_rx_queue(kobj);
918 struct rps_dev_flow_table *flow_table;
920 map = rcu_dereference_protected(queue->rps_map, 1);
922 RCU_INIT_POINTER(queue->rps_map, NULL);
926 flow_table = rcu_dereference_protected(queue->rps_flow_table, 1);
928 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
929 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
933 memset(kobj, 0, sizeof(*kobj));
937 static const void *rx_queue_namespace(struct kobject *kobj)
939 struct netdev_rx_queue *queue = to_rx_queue(kobj);
940 struct device *dev = &queue->dev->dev;
941 const void *ns = NULL;
943 if (dev->class && dev->class->ns_type)
944 ns = dev->class->namespace(dev);
949 static void rx_queue_get_ownership(struct kobject *kobj,
950 kuid_t *uid, kgid_t *gid)
952 const struct net *net = rx_queue_namespace(kobj);
954 net_ns_get_ownership(net, uid, gid);
957 static struct kobj_type rx_queue_ktype __ro_after_init = {
958 .sysfs_ops = &rx_queue_sysfs_ops,
959 .release = rx_queue_release,
960 .default_groups = rx_queue_default_groups,
961 .namespace = rx_queue_namespace,
962 .get_ownership = rx_queue_get_ownership,
965 static int rx_queue_add_kobject(struct net_device *dev, int index)
967 struct netdev_rx_queue *queue = dev->_rx + index;
968 struct kobject *kobj = &queue->kobj;
971 /* Kobject_put later will trigger rx_queue_release call which
972 * decreases dev refcount: Take that reference here
974 dev_hold(queue->dev);
976 kobj->kset = dev->queues_kset;
977 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
982 if (dev->sysfs_rx_queue_group) {
983 error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group);
988 kobject_uevent(kobj, KOBJ_ADD);
996 #endif /* CONFIG_SYSFS */
999 net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
1006 if (!dev->sysfs_rx_queue_group)
1009 for (i = old_num; i < new_num; i++) {
1010 error = rx_queue_add_kobject(dev, i);
1017 while (--i >= new_num) {
1018 struct kobject *kobj = &dev->_rx[i].kobj;
1020 if (!refcount_read(&dev_net(dev)->count))
1021 kobj->uevent_suppress = 1;
1022 if (dev->sysfs_rx_queue_group)
1023 sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
1035 * netdev_queue sysfs structures and functions.
1037 struct netdev_queue_attribute {
1038 struct attribute attr;
1039 ssize_t (*show)(struct netdev_queue *queue, char *buf);
1040 ssize_t (*store)(struct netdev_queue *queue,
1041 const char *buf, size_t len);
1043 #define to_netdev_queue_attr(_attr) \
1044 container_of(_attr, struct netdev_queue_attribute, attr)
1046 #define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
1048 static ssize_t netdev_queue_attr_show(struct kobject *kobj,
1049 struct attribute *attr, char *buf)
1051 const struct netdev_queue_attribute *attribute
1052 = to_netdev_queue_attr(attr);
1053 struct netdev_queue *queue = to_netdev_queue(kobj);
1055 if (!attribute->show)
1058 return attribute->show(queue, buf);
1061 static ssize_t netdev_queue_attr_store(struct kobject *kobj,
1062 struct attribute *attr,
1063 const char *buf, size_t count)
1065 const struct netdev_queue_attribute *attribute
1066 = to_netdev_queue_attr(attr);
1067 struct netdev_queue *queue = to_netdev_queue(kobj);
1069 if (!attribute->store)
1072 return attribute->store(queue, buf, count);
1075 static const struct sysfs_ops netdev_queue_sysfs_ops = {
1076 .show = netdev_queue_attr_show,
1077 .store = netdev_queue_attr_store,
1080 static ssize_t tx_timeout_show(struct netdev_queue *queue, char *buf)
1082 unsigned long trans_timeout;
1084 spin_lock_irq(&queue->_xmit_lock);
1085 trans_timeout = queue->trans_timeout;
1086 spin_unlock_irq(&queue->_xmit_lock);
1088 return sprintf(buf, fmt_ulong, trans_timeout);
1091 static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
1093 struct net_device *dev = queue->dev;
1096 i = queue - dev->_tx;
1097 BUG_ON(i >= dev->num_tx_queues);
1102 static ssize_t traffic_class_show(struct netdev_queue *queue,
1105 struct net_device *dev = queue->dev;
1109 if (!netif_is_multiqueue(dev))
1112 index = get_netdev_queue_index(queue);
1114 /* If queue belongs to subordinate dev use its TC mapping */
1115 dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev;
1117 tc = netdev_txq_to_tc(dev, index);
1121 /* We can report the traffic class one of two ways:
1122 * Subordinate device traffic classes are reported with the traffic
1123 * class first, and then the subordinate class so for example TC0 on
1124 * subordinate device 2 will be reported as "0-2". If the queue
1125 * belongs to the root device it will be reported with just the
1126 * traffic class, so just "0" for TC 0 for example.
1128 return dev->num_tc < 0 ? sprintf(buf, "%u%d\n", tc, dev->num_tc) :
1129 sprintf(buf, "%u\n", tc);
1133 static ssize_t tx_maxrate_show(struct netdev_queue *queue,
1136 return sprintf(buf, "%lu\n", queue->tx_maxrate);
1139 static ssize_t tx_maxrate_store(struct netdev_queue *queue,
1140 const char *buf, size_t len)
1142 struct net_device *dev = queue->dev;
1143 int err, index = get_netdev_queue_index(queue);
1146 if (!capable(CAP_NET_ADMIN))
1149 /* The check is also done later; this helps returning early without
1150 * hitting the trylock/restart below.
1152 if (!dev->netdev_ops->ndo_set_tx_maxrate)
1155 err = kstrtou32(buf, 10, &rate);
1159 if (!rtnl_trylock())
1160 return restart_syscall();
1163 if (dev->netdev_ops->ndo_set_tx_maxrate)
1164 err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate);
1168 queue->tx_maxrate = rate;
1174 static struct netdev_queue_attribute queue_tx_maxrate __ro_after_init
1175 = __ATTR_RW(tx_maxrate);
1178 static struct netdev_queue_attribute queue_trans_timeout __ro_after_init
1179 = __ATTR_RO(tx_timeout);
1181 static struct netdev_queue_attribute queue_traffic_class __ro_after_init
1182 = __ATTR_RO(traffic_class);
1186 * Byte queue limits sysfs structures and functions.
1188 static ssize_t bql_show(char *buf, unsigned int value)
1190 return sprintf(buf, "%u\n", value);
1193 static ssize_t bql_set(const char *buf, const size_t count,
1194 unsigned int *pvalue)
1199 if (!strcmp(buf, "max") || !strcmp(buf, "max\n")) {
1200 value = DQL_MAX_LIMIT;
1202 err = kstrtouint(buf, 10, &value);
1205 if (value > DQL_MAX_LIMIT)
1214 static ssize_t bql_show_hold_time(struct netdev_queue *queue,
1217 struct dql *dql = &queue->dql;
1219 return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time));
1222 static ssize_t bql_set_hold_time(struct netdev_queue *queue,
1223 const char *buf, size_t len)
1225 struct dql *dql = &queue->dql;
1229 err = kstrtouint(buf, 10, &value);
1233 dql->slack_hold_time = msecs_to_jiffies(value);
1238 static struct netdev_queue_attribute bql_hold_time_attribute __ro_after_init
1239 = __ATTR(hold_time, 0644,
1240 bql_show_hold_time, bql_set_hold_time);
1242 static ssize_t bql_show_inflight(struct netdev_queue *queue,
1245 struct dql *dql = &queue->dql;
1247 return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed);
1250 static struct netdev_queue_attribute bql_inflight_attribute __ro_after_init =
1251 __ATTR(inflight, 0444, bql_show_inflight, NULL);
1253 #define BQL_ATTR(NAME, FIELD) \
1254 static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \
1257 return bql_show(buf, queue->dql.FIELD); \
1260 static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \
1261 const char *buf, size_t len) \
1263 return bql_set(buf, len, &queue->dql.FIELD); \
1266 static struct netdev_queue_attribute bql_ ## NAME ## _attribute __ro_after_init \
1267 = __ATTR(NAME, 0644, \
1268 bql_show_ ## NAME, bql_set_ ## NAME)
1270 BQL_ATTR(limit, limit);
1271 BQL_ATTR(limit_max, max_limit);
1272 BQL_ATTR(limit_min, min_limit);
1274 static struct attribute *dql_attrs[] __ro_after_init = {
1275 &bql_limit_attribute.attr,
1276 &bql_limit_max_attribute.attr,
1277 &bql_limit_min_attribute.attr,
1278 &bql_hold_time_attribute.attr,
1279 &bql_inflight_attribute.attr,
1283 static const struct attribute_group dql_group = {
1284 .name = "byte_queue_limits",
1287 #endif /* CONFIG_BQL */
1290 static ssize_t xps_cpus_show(struct netdev_queue *queue,
1293 int cpu, len, ret, num_tc = 1, tc = 0;
1294 struct net_device *dev = queue->dev;
1295 struct xps_dev_maps *dev_maps;
1297 unsigned long index;
1299 if (!netif_is_multiqueue(dev))
1302 index = get_netdev_queue_index(queue);
1304 if (!rtnl_trylock())
1305 return restart_syscall();
1308 /* Do not allow XPS on subordinate device directly */
1309 num_tc = dev->num_tc;
1312 goto err_rtnl_unlock;
1315 /* If queue belongs to subordinate dev use its map */
1316 dev = netdev_get_tx_queue(dev, index)->sb_dev ? : dev;
1318 tc = netdev_txq_to_tc(dev, index);
1321 goto err_rtnl_unlock;
1325 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) {
1327 goto err_rtnl_unlock;
1331 dev_maps = rcu_dereference(dev->xps_cpus_map);
1333 for_each_possible_cpu(cpu) {
1334 int i, tci = cpu * num_tc + tc;
1335 struct xps_map *map;
1337 map = rcu_dereference(dev_maps->attr_map[tci]);
1341 for (i = map->len; i--;) {
1342 if (map->queues[i] == index) {
1343 cpumask_set_cpu(cpu, mask);
1353 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
1354 free_cpumask_var(mask);
1355 return len < PAGE_SIZE ? len : -EINVAL;
1362 static ssize_t xps_cpus_store(struct netdev_queue *queue,
1363 const char *buf, size_t len)
1365 struct net_device *dev = queue->dev;
1366 unsigned long index;
1370 if (!netif_is_multiqueue(dev))
1373 if (!capable(CAP_NET_ADMIN))
1376 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
1379 index = get_netdev_queue_index(queue);
1381 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
1383 free_cpumask_var(mask);
1387 if (!rtnl_trylock()) {
1388 free_cpumask_var(mask);
1389 return restart_syscall();
1392 err = netif_set_xps_queue(dev, mask, index);
1395 free_cpumask_var(mask);
1400 static struct netdev_queue_attribute xps_cpus_attribute __ro_after_init
1401 = __ATTR_RW(xps_cpus);
1403 static ssize_t xps_rxqs_show(struct netdev_queue *queue, char *buf)
1405 int j, len, ret, num_tc = 1, tc = 0;
1406 struct net_device *dev = queue->dev;
1407 struct xps_dev_maps *dev_maps;
1408 unsigned long *mask, index;
1410 index = get_netdev_queue_index(queue);
1412 if (!rtnl_trylock())
1413 return restart_syscall();
1416 num_tc = dev->num_tc;
1417 tc = netdev_txq_to_tc(dev, index);
1420 goto err_rtnl_unlock;
1423 mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL);
1426 goto err_rtnl_unlock;
1430 dev_maps = rcu_dereference(dev->xps_rxqs_map);
1434 for (j = -1; j = netif_attrmask_next(j, NULL, dev->num_rx_queues),
1435 j < dev->num_rx_queues;) {
1436 int i, tci = j * num_tc + tc;
1437 struct xps_map *map;
1439 map = rcu_dereference(dev_maps->attr_map[tci]);
1443 for (i = map->len; i--;) {
1444 if (map->queues[i] == index) {
1455 len = bitmap_print_to_pagebuf(false, buf, mask, dev->num_rx_queues);
1458 return len < PAGE_SIZE ? len : -EINVAL;
1465 static ssize_t xps_rxqs_store(struct netdev_queue *queue, const char *buf,
1468 struct net_device *dev = queue->dev;
1469 struct net *net = dev_net(dev);
1470 unsigned long *mask, index;
1473 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1476 mask = bitmap_zalloc(dev->num_rx_queues, GFP_KERNEL);
1480 index = get_netdev_queue_index(queue);
1482 err = bitmap_parse(buf, len, mask, dev->num_rx_queues);
1488 if (!rtnl_trylock()) {
1490 return restart_syscall();
1494 err = __netif_set_xps_queue(dev, mask, index, true);
1503 static struct netdev_queue_attribute xps_rxqs_attribute __ro_after_init
1504 = __ATTR_RW(xps_rxqs);
1505 #endif /* CONFIG_XPS */
1507 static struct attribute *netdev_queue_default_attrs[] __ro_after_init = {
1508 &queue_trans_timeout.attr,
1509 &queue_traffic_class.attr,
1511 &xps_cpus_attribute.attr,
1512 &xps_rxqs_attribute.attr,
1513 &queue_tx_maxrate.attr,
1517 ATTRIBUTE_GROUPS(netdev_queue_default);
1519 static void netdev_queue_release(struct kobject *kobj)
1521 struct netdev_queue *queue = to_netdev_queue(kobj);
1523 memset(kobj, 0, sizeof(*kobj));
1524 dev_put(queue->dev);
1527 static const void *netdev_queue_namespace(struct kobject *kobj)
1529 struct netdev_queue *queue = to_netdev_queue(kobj);
1530 struct device *dev = &queue->dev->dev;
1531 const void *ns = NULL;
1533 if (dev->class && dev->class->ns_type)
1534 ns = dev->class->namespace(dev);
1539 static void netdev_queue_get_ownership(struct kobject *kobj,
1540 kuid_t *uid, kgid_t *gid)
1542 const struct net *net = netdev_queue_namespace(kobj);
1544 net_ns_get_ownership(net, uid, gid);
1547 static struct kobj_type netdev_queue_ktype __ro_after_init = {
1548 .sysfs_ops = &netdev_queue_sysfs_ops,
1549 .release = netdev_queue_release,
1550 .default_groups = netdev_queue_default_groups,
1551 .namespace = netdev_queue_namespace,
1552 .get_ownership = netdev_queue_get_ownership,
1555 static int netdev_queue_add_kobject(struct net_device *dev, int index)
1557 struct netdev_queue *queue = dev->_tx + index;
1558 struct kobject *kobj = &queue->kobj;
1561 /* Kobject_put later will trigger netdev_queue_release call
1562 * which decreases dev refcount: Take that reference here
1564 dev_hold(queue->dev);
1566 kobj->kset = dev->queues_kset;
1567 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1573 error = sysfs_create_group(kobj, &dql_group);
1578 kobject_uevent(kobj, KOBJ_ADD);
1585 #endif /* CONFIG_SYSFS */
1588 netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
1594 for (i = old_num; i < new_num; i++) {
1595 error = netdev_queue_add_kobject(dev, i);
1602 while (--i >= new_num) {
1603 struct netdev_queue *queue = dev->_tx + i;
1605 if (!refcount_read(&dev_net(dev)->count))
1606 queue->kobj.uevent_suppress = 1;
1608 sysfs_remove_group(&queue->kobj, &dql_group);
1610 kobject_put(&queue->kobj);
1616 #endif /* CONFIG_SYSFS */
1619 static int register_queue_kobjects(struct net_device *dev)
1621 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
1624 dev->queues_kset = kset_create_and_add("queues",
1625 NULL, &dev->dev.kobj);
1626 if (!dev->queues_kset)
1628 real_rx = dev->real_num_rx_queues;
1630 real_tx = dev->real_num_tx_queues;
1632 error = net_rx_queue_update_kobjects(dev, 0, real_rx);
1637 error = netdev_queue_update_kobjects(dev, 0, real_tx);
1645 netdev_queue_update_kobjects(dev, txq, 0);
1646 net_rx_queue_update_kobjects(dev, rxq, 0);
1648 kset_unregister(dev->queues_kset);
1653 static void remove_queue_kobjects(struct net_device *dev)
1655 int real_rx = 0, real_tx = 0;
1658 real_rx = dev->real_num_rx_queues;
1660 real_tx = dev->real_num_tx_queues;
1662 net_rx_queue_update_kobjects(dev, real_rx, 0);
1663 netdev_queue_update_kobjects(dev, real_tx, 0);
1665 dev->real_num_rx_queues = 0;
1666 dev->real_num_tx_queues = 0;
1668 kset_unregister(dev->queues_kset);
1672 static bool net_current_may_mount(void)
1674 struct net *net = current->nsproxy->net_ns;
1676 return ns_capable(net->user_ns, CAP_SYS_ADMIN);
1679 static void *net_grab_current_ns(void)
1681 struct net *ns = current->nsproxy->net_ns;
1682 #ifdef CONFIG_NET_NS
1684 refcount_inc(&ns->passive);
1689 static const void *net_initial_ns(void)
1694 static const void *net_netlink_ns(struct sock *sk)
1696 return sock_net(sk);
1699 const struct kobj_ns_type_operations net_ns_type_operations = {
1700 .type = KOBJ_NS_TYPE_NET,
1701 .current_may_mount = net_current_may_mount,
1702 .grab_current_ns = net_grab_current_ns,
1703 .netlink_ns = net_netlink_ns,
1704 .initial_ns = net_initial_ns,
1705 .drop_ns = net_drop_ns,
1707 EXPORT_SYMBOL_GPL(net_ns_type_operations);
1709 static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
1711 struct net_device *dev = to_net_dev(d);
1714 /* pass interface to uevent. */
1715 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
1719 /* pass ifindex to uevent.
1720 * ifindex is useful as it won't change (interface name may change)
1721 * and is what RtNetlink uses natively.
1723 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1730 * netdev_release -- destroy and free a dead device.
1731 * Called when last reference to device kobject is gone.
1733 static void netdev_release(struct device *d)
1735 struct net_device *dev = to_net_dev(d);
1737 BUG_ON(dev->reg_state != NETREG_RELEASED);
1739 /* no need to wait for rcu grace period:
1740 * device is dead and about to be freed.
1742 kfree(rcu_access_pointer(dev->ifalias));
1743 netdev_freemem(dev);
1746 static const void *net_namespace(struct device *d)
1748 struct net_device *dev = to_net_dev(d);
1750 return dev_net(dev);
1753 static void net_get_ownership(struct device *d, kuid_t *uid, kgid_t *gid)
1755 struct net_device *dev = to_net_dev(d);
1756 const struct net *net = dev_net(dev);
1758 net_ns_get_ownership(net, uid, gid);
1761 static struct class net_class __ro_after_init = {
1763 .dev_release = netdev_release,
1764 .dev_groups = net_class_groups,
1765 .dev_uevent = netdev_uevent,
1766 .ns_type = &net_ns_type_operations,
1767 .namespace = net_namespace,
1768 .get_ownership = net_get_ownership,
1771 #ifdef CONFIG_OF_NET
1772 static int of_dev_node_match(struct device *dev, const void *data)
1777 ret = dev->parent->of_node == data;
1779 return ret == 0 ? dev->of_node == data : ret;
1783 * of_find_net_device_by_node - lookup the net device for the device node
1784 * @np: OF device node
1786 * Looks up the net_device structure corresponding with the device node.
1787 * If successful, returns a pointer to the net_device with the embedded
1788 * struct device refcount incremented by one, or NULL on failure. The
1789 * refcount must be dropped when done with the net_device.
1791 struct net_device *of_find_net_device_by_node(struct device_node *np)
1795 dev = class_find_device(&net_class, NULL, np, of_dev_node_match);
1799 return to_net_dev(dev);
1801 EXPORT_SYMBOL(of_find_net_device_by_node);
1804 /* Delete sysfs entries but hold kobject reference until after all
1805 * netdev references are gone.
1807 void netdev_unregister_kobject(struct net_device *ndev)
1809 struct device *dev = &ndev->dev;
1811 if (!refcount_read(&dev_net(ndev)->count))
1812 dev_set_uevent_suppress(dev, 1);
1814 kobject_get(&dev->kobj);
1816 remove_queue_kobjects(ndev);
1818 pm_runtime_set_memalloc_noio(dev, false);
1823 /* Create sysfs entries for network device. */
1824 int netdev_register_kobject(struct net_device *ndev)
1826 struct device *dev = &ndev->dev;
1827 const struct attribute_group **groups = ndev->sysfs_groups;
1830 device_initialize(dev);
1831 dev->class = &net_class;
1832 dev->platform_data = ndev;
1833 dev->groups = groups;
1835 dev_set_name(dev, "%s", ndev->name);
1838 /* Allow for a device specific group */
1842 *groups++ = &netstat_group;
1844 #if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
1845 if (ndev->ieee80211_ptr)
1846 *groups++ = &wireless_group;
1847 #if IS_ENABLED(CONFIG_WIRELESS_EXT)
1848 else if (ndev->wireless_handlers)
1849 *groups++ = &wireless_group;
1852 #endif /* CONFIG_SYSFS */
1854 error = device_add(dev);
1858 error = register_queue_kobjects(ndev);
1864 pm_runtime_set_memalloc_noio(dev, true);
1869 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
1872 return class_create_file_ns(&net_class, class_attr, ns);
1874 EXPORT_SYMBOL(netdev_class_create_file_ns);
1876 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
1879 class_remove_file_ns(&net_class, class_attr, ns);
1881 EXPORT_SYMBOL(netdev_class_remove_file_ns);
1883 int __init netdev_kobject_init(void)
1885 kobj_ns_type_register(&net_ns_type_operations);
1886 return class_register(&net_class);