1
2
3
4
5
6
7
8
9
10
11
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#include <linux/of_net.h>
28
29#include "net-sysfs.h"
30
31#ifdef CONFIG_SYSFS
32static const char fmt_hex[] = "%#x\n";
33static const char fmt_dec[] = "%d\n";
34static const char fmt_ulong[] = "%lu\n";
35static const char fmt_u64[] = "%llu\n";
36
37static inline int dev_isalive(const struct net_device *dev)
38{
39 return dev->reg_state <= NETREG_REGISTERED;
40}
41
42
43static ssize_t netdev_show(const struct device *dev,
44 struct device_attribute *attr, char *buf,
45 ssize_t (*format)(const struct net_device *, char *))
46{
47 struct net_device *ndev = to_net_dev(dev);
48 ssize_t ret = -EINVAL;
49
50 read_lock(&dev_base_lock);
51 if (dev_isalive(ndev))
52 ret = (*format)(ndev, buf);
53 read_unlock(&dev_base_lock);
54
55 return ret;
56}
57
58
59#define NETDEVICE_SHOW(field, format_string) \
60static ssize_t format_##field(const struct net_device *dev, char *buf) \
61{ \
62 return sprintf(buf, format_string, dev->field); \
63} \
64static ssize_t field##_show(struct device *dev, \
65 struct device_attribute *attr, char *buf) \
66{ \
67 return netdev_show(dev, attr, buf, format_##field); \
68} \
69
70#define NETDEVICE_SHOW_RO(field, format_string) \
71NETDEVICE_SHOW(field, format_string); \
72static DEVICE_ATTR_RO(field)
73
74#define NETDEVICE_SHOW_RW(field, format_string) \
75NETDEVICE_SHOW(field, format_string); \
76static DEVICE_ATTR_RW(field)
77
78
79static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
80 const char *buf, size_t len,
81 int (*set)(struct net_device *, unsigned long))
82{
83 struct net_device *netdev = to_net_dev(dev);
84 struct net *net = dev_net(netdev);
85 unsigned long new;
86 int ret = -EINVAL;
87
88 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
89 return -EPERM;
90
91 ret = kstrtoul(buf, 0, &new);
92 if (ret)
93 goto err;
94
95 if (!rtnl_trylock())
96 return restart_syscall();
97
98 if (dev_isalive(netdev)) {
99 if ((ret = (*set)(netdev, new)) == 0)
100 ret = len;
101 }
102 rtnl_unlock();
103 err:
104 return ret;
105}
106
107NETDEVICE_SHOW_RO(dev_id, fmt_hex);
108NETDEVICE_SHOW_RO(dev_port, fmt_dec);
109NETDEVICE_SHOW_RO(addr_assign_type, fmt_dec);
110NETDEVICE_SHOW_RO(addr_len, fmt_dec);
111NETDEVICE_SHOW_RO(ifindex, fmt_dec);
112NETDEVICE_SHOW_RO(type, fmt_dec);
113NETDEVICE_SHOW_RO(link_mode, fmt_dec);
114
115static ssize_t iflink_show(struct device *dev, struct device_attribute *attr,
116 char *buf)
117{
118 struct net_device *ndev = to_net_dev(dev);
119
120 return sprintf(buf, fmt_dec, dev_get_iflink(ndev));
121}
122static DEVICE_ATTR_RO(iflink);
123
124static ssize_t format_name_assign_type(const struct net_device *dev, char *buf)
125{
126 return sprintf(buf, fmt_dec, dev->name_assign_type);
127}
128
129static ssize_t name_assign_type_show(struct device *dev,
130 struct device_attribute *attr,
131 char *buf)
132{
133 struct net_device *ndev = to_net_dev(dev);
134 ssize_t ret = -EINVAL;
135
136 if (ndev->name_assign_type != NET_NAME_UNKNOWN)
137 ret = netdev_show(dev, attr, buf, format_name_assign_type);
138
139 return ret;
140}
141static DEVICE_ATTR_RO(name_assign_type);
142
143
144static ssize_t address_show(struct device *dev, struct device_attribute *attr,
145 char *buf)
146{
147 struct net_device *ndev = to_net_dev(dev);
148 ssize_t ret = -EINVAL;
149
150 read_lock(&dev_base_lock);
151 if (dev_isalive(ndev))
152 ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len);
153 read_unlock(&dev_base_lock);
154 return ret;
155}
156static DEVICE_ATTR_RO(address);
157
158static ssize_t broadcast_show(struct device *dev,
159 struct device_attribute *attr, char *buf)
160{
161 struct net_device *ndev = to_net_dev(dev);
162 if (dev_isalive(ndev))
163 return sysfs_format_mac(buf, ndev->broadcast, ndev->addr_len);
164 return -EINVAL;
165}
166static DEVICE_ATTR_RO(broadcast);
167
168static int change_carrier(struct net_device *dev, unsigned long new_carrier)
169{
170 if (!netif_running(dev))
171 return -EINVAL;
172 return dev_change_carrier(dev, (bool) new_carrier);
173}
174
175static ssize_t carrier_store(struct device *dev, struct device_attribute *attr,
176 const char *buf, size_t len)
177{
178 return netdev_store(dev, attr, buf, len, change_carrier);
179}
180
181static ssize_t carrier_show(struct device *dev,
182 struct device_attribute *attr, char *buf)
183{
184 struct net_device *netdev = to_net_dev(dev);
185 if (netif_running(netdev)) {
186 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
187 }
188 return -EINVAL;
189}
190static DEVICE_ATTR_RW(carrier);
191
192static ssize_t speed_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 ret = sprintf(buf, fmt_dec, cmd.base.speed);
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_link_ksettings cmd;
223
224 if (!__ethtool_get_link_ksettings(netdev, &cmd)) {
225 const char *duplex;
226
227 switch (cmd.base.duplex) {
228 case DUPLEX_HALF:
229 duplex = "half";
230 break;
231 case DUPLEX_FULL:
232 duplex = "full";
233 break;
234 default:
235 duplex = "unknown";
236 break;
237 }
238 ret = sprintf(buf, "%s\n", duplex);
239 }
240 }
241 rtnl_unlock();
242 return ret;
243}
244static DEVICE_ATTR_RO(duplex);
245
246static ssize_t dormant_show(struct device *dev,
247 struct device_attribute *attr, char *buf)
248{
249 struct net_device *netdev = to_net_dev(dev);
250
251 if (netif_running(netdev))
252 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
253
254 return -EINVAL;
255}
256static DEVICE_ATTR_RO(dormant);
257
258static const char *const operstates[] = {
259 "unknown",
260 "notpresent",
261 "down",
262 "lowerlayerdown",
263 "testing",
264 "dormant",
265 "up"
266};
267
268static ssize_t operstate_show(struct device *dev,
269 struct device_attribute *attr, char *buf)
270{
271 const struct net_device *netdev = to_net_dev(dev);
272 unsigned char operstate;
273
274 read_lock(&dev_base_lock);
275 operstate = netdev->operstate;
276 if (!netif_running(netdev))
277 operstate = IF_OPER_DOWN;
278 read_unlock(&dev_base_lock);
279
280 if (operstate >= ARRAY_SIZE(operstates))
281 return -EINVAL;
282
283 return sprintf(buf, "%s\n", operstates[operstate]);
284}
285static DEVICE_ATTR_RO(operstate);
286
287static ssize_t carrier_changes_show(struct device *dev,
288 struct device_attribute *attr,
289 char *buf)
290{
291 struct net_device *netdev = to_net_dev(dev);
292 return sprintf(buf, fmt_dec,
293 atomic_read(&netdev->carrier_changes));
294}
295static DEVICE_ATTR_RO(carrier_changes);
296
297
298
299static int change_mtu(struct net_device *dev, unsigned long new_mtu)
300{
301 return dev_set_mtu(dev, (int) new_mtu);
302}
303
304static ssize_t mtu_store(struct device *dev, struct device_attribute *attr,
305 const char *buf, size_t len)
306{
307 return netdev_store(dev, attr, buf, len, change_mtu);
308}
309NETDEVICE_SHOW_RW(mtu, fmt_dec);
310
311static int change_flags(struct net_device *dev, unsigned long new_flags)
312{
313 return dev_change_flags(dev, (unsigned int) new_flags);
314}
315
316static ssize_t flags_store(struct device *dev, struct device_attribute *attr,
317 const char *buf, size_t len)
318{
319 return netdev_store(dev, attr, buf, len, change_flags);
320}
321NETDEVICE_SHOW_RW(flags, fmt_hex);
322
323static int change_tx_queue_len(struct net_device *dev, unsigned long new_len)
324{
325 int res, orig_len = dev->tx_queue_len;
326
327 if (new_len != orig_len) {
328 dev->tx_queue_len = new_len;
329 res = call_netdevice_notifiers(NETDEV_CHANGE_TX_QUEUE_LEN, dev);
330 res = notifier_to_errno(res);
331 if (res) {
332 netdev_err(dev,
333 "refused to change device tx_queue_len\n");
334 dev->tx_queue_len = orig_len;
335 return -EFAULT;
336 }
337 }
338
339 return 0;
340}
341
342static ssize_t tx_queue_len_store(struct device *dev,
343 struct device_attribute *attr,
344 const char *buf, size_t len)
345{
346 if (!capable(CAP_NET_ADMIN))
347 return -EPERM;
348
349 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
350}
351NETDEVICE_SHOW_RW(tx_queue_len, fmt_ulong);
352
353static int change_gro_flush_timeout(struct net_device *dev, unsigned long val)
354{
355 dev->gro_flush_timeout = val;
356 return 0;
357}
358
359static ssize_t gro_flush_timeout_store(struct device *dev,
360 struct device_attribute *attr,
361 const char *buf, size_t len)
362{
363 if (!capable(CAP_NET_ADMIN))
364 return -EPERM;
365
366 return netdev_store(dev, attr, buf, len, change_gro_flush_timeout);
367}
368NETDEVICE_SHOW_RW(gro_flush_timeout, fmt_ulong);
369
370static ssize_t ifalias_store(struct device *dev, struct device_attribute *attr,
371 const char *buf, size_t len)
372{
373 struct net_device *netdev = to_net_dev(dev);
374 struct net *net = dev_net(netdev);
375 size_t count = len;
376 ssize_t ret;
377
378 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
379 return -EPERM;
380
381
382 if (len > 0 && buf[len - 1] == '\n')
383 --count;
384
385 if (!rtnl_trylock())
386 return restart_syscall();
387 ret = dev_set_alias(netdev, buf, count);
388 rtnl_unlock();
389
390 return ret < 0 ? ret : len;
391}
392
393static ssize_t ifalias_show(struct device *dev,
394 struct device_attribute *attr, char *buf)
395{
396 const struct net_device *netdev = to_net_dev(dev);
397 ssize_t ret = 0;
398
399 if (!rtnl_trylock())
400 return restart_syscall();
401 if (netdev->ifalias)
402 ret = sprintf(buf, "%s\n", netdev->ifalias);
403 rtnl_unlock();
404 return ret;
405}
406static DEVICE_ATTR_RW(ifalias);
407
408static int change_group(struct net_device *dev, unsigned long new_group)
409{
410 dev_set_group(dev, (int) new_group);
411 return 0;
412}
413
414static ssize_t group_store(struct device *dev, struct device_attribute *attr,
415 const char *buf, size_t len)
416{
417 return netdev_store(dev, attr, buf, len, change_group);
418}
419NETDEVICE_SHOW(group, fmt_dec);
420static DEVICE_ATTR(netdev_group, S_IRUGO | S_IWUSR, group_show, group_store);
421
422static int change_proto_down(struct net_device *dev, unsigned long proto_down)
423{
424 return dev_change_proto_down(dev, (bool) proto_down);
425}
426
427static ssize_t proto_down_store(struct device *dev,
428 struct device_attribute *attr,
429 const char *buf, size_t len)
430{
431 return netdev_store(dev, attr, buf, len, change_proto_down);
432}
433NETDEVICE_SHOW_RW(proto_down, fmt_dec);
434
435static ssize_t phys_port_id_show(struct device *dev,
436 struct device_attribute *attr, char *buf)
437{
438 struct net_device *netdev = to_net_dev(dev);
439 ssize_t ret = -EINVAL;
440
441 if (!rtnl_trylock())
442 return restart_syscall();
443
444 if (dev_isalive(netdev)) {
445 struct netdev_phys_item_id ppid;
446
447 ret = dev_get_phys_port_id(netdev, &ppid);
448 if (!ret)
449 ret = sprintf(buf, "%*phN\n", ppid.id_len, ppid.id);
450 }
451 rtnl_unlock();
452
453 return ret;
454}
455static DEVICE_ATTR_RO(phys_port_id);
456
457static ssize_t phys_port_name_show(struct device *dev,
458 struct device_attribute *attr, char *buf)
459{
460 struct net_device *netdev = to_net_dev(dev);
461 ssize_t ret = -EINVAL;
462
463 if (!rtnl_trylock())
464 return restart_syscall();
465
466 if (dev_isalive(netdev)) {
467 char name[IFNAMSIZ];
468
469 ret = dev_get_phys_port_name(netdev, name, sizeof(name));
470 if (!ret)
471 ret = sprintf(buf, "%s\n", name);
472 }
473 rtnl_unlock();
474
475 return ret;
476}
477static DEVICE_ATTR_RO(phys_port_name);
478
479static ssize_t phys_switch_id_show(struct device *dev,
480 struct device_attribute *attr, char *buf)
481{
482 struct net_device *netdev = to_net_dev(dev);
483 ssize_t ret = -EINVAL;
484
485 if (!rtnl_trylock())
486 return restart_syscall();
487
488 if (dev_isalive(netdev)) {
489 struct switchdev_attr attr = {
490 .orig_dev = netdev,
491 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
492 .flags = SWITCHDEV_F_NO_RECURSE,
493 };
494
495 ret = switchdev_port_attr_get(netdev, &attr);
496 if (!ret)
497 ret = sprintf(buf, "%*phN\n", attr.u.ppid.id_len,
498 attr.u.ppid.id);
499 }
500 rtnl_unlock();
501
502 return ret;
503}
504static DEVICE_ATTR_RO(phys_switch_id);
505
506static struct attribute *net_class_attrs[] = {
507 &dev_attr_netdev_group.attr,
508 &dev_attr_type.attr,
509 &dev_attr_dev_id.attr,
510 &dev_attr_dev_port.attr,
511 &dev_attr_iflink.attr,
512 &dev_attr_ifindex.attr,
513 &dev_attr_name_assign_type.attr,
514 &dev_attr_addr_assign_type.attr,
515 &dev_attr_addr_len.attr,
516 &dev_attr_link_mode.attr,
517 &dev_attr_address.attr,
518 &dev_attr_broadcast.attr,
519 &dev_attr_speed.attr,
520 &dev_attr_duplex.attr,
521 &dev_attr_dormant.attr,
522 &dev_attr_operstate.attr,
523 &dev_attr_carrier_changes.attr,
524 &dev_attr_ifalias.attr,
525 &dev_attr_carrier.attr,
526 &dev_attr_mtu.attr,
527 &dev_attr_flags.attr,
528 &dev_attr_tx_queue_len.attr,
529 &dev_attr_gro_flush_timeout.attr,
530 &dev_attr_phys_port_id.attr,
531 &dev_attr_phys_port_name.attr,
532 &dev_attr_phys_switch_id.attr,
533 &dev_attr_proto_down.attr,
534 NULL,
535};
536ATTRIBUTE_GROUPS(net_class);
537
538
539static ssize_t netstat_show(const struct device *d,
540 struct device_attribute *attr, char *buf,
541 unsigned long offset)
542{
543 struct net_device *dev = to_net_dev(d);
544 ssize_t ret = -EINVAL;
545
546 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
547 offset % sizeof(u64) != 0);
548
549 read_lock(&dev_base_lock);
550 if (dev_isalive(dev)) {
551 struct rtnl_link_stats64 temp;
552 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
553
554 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
555 }
556 read_unlock(&dev_base_lock);
557 return ret;
558}
559
560
561#define NETSTAT_ENTRY(name) \
562static ssize_t name##_show(struct device *d, \
563 struct device_attribute *attr, char *buf) \
564{ \
565 return netstat_show(d, attr, buf, \
566 offsetof(struct rtnl_link_stats64, name)); \
567} \
568static DEVICE_ATTR_RO(name)
569
570NETSTAT_ENTRY(rx_packets);
571NETSTAT_ENTRY(tx_packets);
572NETSTAT_ENTRY(rx_bytes);
573NETSTAT_ENTRY(tx_bytes);
574NETSTAT_ENTRY(rx_errors);
575NETSTAT_ENTRY(tx_errors);
576NETSTAT_ENTRY(rx_dropped);
577NETSTAT_ENTRY(tx_dropped);
578NETSTAT_ENTRY(multicast);
579NETSTAT_ENTRY(collisions);
580NETSTAT_ENTRY(rx_length_errors);
581NETSTAT_ENTRY(rx_over_errors);
582NETSTAT_ENTRY(rx_crc_errors);
583NETSTAT_ENTRY(rx_frame_errors);
584NETSTAT_ENTRY(rx_fifo_errors);
585NETSTAT_ENTRY(rx_missed_errors);
586NETSTAT_ENTRY(tx_aborted_errors);
587NETSTAT_ENTRY(tx_carrier_errors);
588NETSTAT_ENTRY(tx_fifo_errors);
589NETSTAT_ENTRY(tx_heartbeat_errors);
590NETSTAT_ENTRY(tx_window_errors);
591NETSTAT_ENTRY(rx_compressed);
592NETSTAT_ENTRY(tx_compressed);
593NETSTAT_ENTRY(rx_nohandler);
594
595static struct attribute *netstat_attrs[] = {
596 &dev_attr_rx_packets.attr,
597 &dev_attr_tx_packets.attr,
598 &dev_attr_rx_bytes.attr,
599 &dev_attr_tx_bytes.attr,
600 &dev_attr_rx_errors.attr,
601 &dev_attr_tx_errors.attr,
602 &dev_attr_rx_dropped.attr,
603 &dev_attr_tx_dropped.attr,
604 &dev_attr_multicast.attr,
605 &dev_attr_collisions.attr,
606 &dev_attr_rx_length_errors.attr,
607 &dev_attr_rx_over_errors.attr,
608 &dev_attr_rx_crc_errors.attr,
609 &dev_attr_rx_frame_errors.attr,
610 &dev_attr_rx_fifo_errors.attr,
611 &dev_attr_rx_missed_errors.attr,
612 &dev_attr_tx_aborted_errors.attr,
613 &dev_attr_tx_carrier_errors.attr,
614 &dev_attr_tx_fifo_errors.attr,
615 &dev_attr_tx_heartbeat_errors.attr,
616 &dev_attr_tx_window_errors.attr,
617 &dev_attr_rx_compressed.attr,
618 &dev_attr_tx_compressed.attr,
619 &dev_attr_rx_nohandler.attr,
620 NULL
621};
622
623
624static struct attribute_group netstat_group = {
625 .name = "statistics",
626 .attrs = netstat_attrs,
627};
628
629#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
630static struct attribute *wireless_attrs[] = {
631 NULL
632};
633
634static struct attribute_group wireless_group = {
635 .name = "wireless",
636 .attrs = wireless_attrs,
637};
638#endif
639
640#else
641#define net_class_groups NULL
642#endif
643
644#ifdef CONFIG_SYSFS
645#define to_rx_queue_attr(_attr) container_of(_attr, \
646 struct rx_queue_attribute, attr)
647
648#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
649
650static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
651 char *buf)
652{
653 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
654 struct netdev_rx_queue *queue = to_rx_queue(kobj);
655
656 if (!attribute->show)
657 return -EIO;
658
659 return attribute->show(queue, attribute, buf);
660}
661
662static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
663 const char *buf, size_t count)
664{
665 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
666 struct netdev_rx_queue *queue = to_rx_queue(kobj);
667
668 if (!attribute->store)
669 return -EIO;
670
671 return attribute->store(queue, attribute, buf, count);
672}
673
674static const struct sysfs_ops rx_queue_sysfs_ops = {
675 .show = rx_queue_attr_show,
676 .store = rx_queue_attr_store,
677};
678
679#ifdef CONFIG_RPS
680static ssize_t show_rps_map(struct netdev_rx_queue *queue,
681 struct rx_queue_attribute *attribute, char *buf)
682{
683 struct rps_map *map;
684 cpumask_var_t mask;
685 int i, len;
686
687 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
688 return -ENOMEM;
689
690 rcu_read_lock();
691 map = rcu_dereference(queue->rps_map);
692 if (map)
693 for (i = 0; i < map->len; i++)
694 cpumask_set_cpu(map->cpus[i], mask);
695
696 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
697 rcu_read_unlock();
698 free_cpumask_var(mask);
699
700 return len < PAGE_SIZE ? len : -EINVAL;
701}
702
703static ssize_t store_rps_map(struct netdev_rx_queue *queue,
704 struct rx_queue_attribute *attribute,
705 const char *buf, size_t len)
706{
707 struct rps_map *old_map, *map;
708 cpumask_var_t mask;
709 int err, cpu, i;
710 static DEFINE_MUTEX(rps_map_mutex);
711
712 if (!capable(CAP_NET_ADMIN))
713 return -EPERM;
714
715 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
716 return -ENOMEM;
717
718 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
719 if (err) {
720 free_cpumask_var(mask);
721 return err;
722 }
723
724 map = kzalloc(max_t(unsigned int,
725 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
726 GFP_KERNEL);
727 if (!map) {
728 free_cpumask_var(mask);
729 return -ENOMEM;
730 }
731
732 i = 0;
733 for_each_cpu_and(cpu, mask, cpu_online_mask)
734 map->cpus[i++] = cpu;
735
736 if (i)
737 map->len = i;
738 else {
739 kfree(map);
740 map = NULL;
741 }
742
743 mutex_lock(&rps_map_mutex);
744 old_map = rcu_dereference_protected(queue->rps_map,
745 mutex_is_locked(&rps_map_mutex));
746 rcu_assign_pointer(queue->rps_map, map);
747
748 if (map)
749 static_key_slow_inc(&rps_needed);
750 if (old_map)
751 static_key_slow_dec(&rps_needed);
752
753 mutex_unlock(&rps_map_mutex);
754
755 if (old_map)
756 kfree_rcu(old_map, rcu);
757
758 free_cpumask_var(mask);
759 return len;
760}
761
762static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
763 struct rx_queue_attribute *attr,
764 char *buf)
765{
766 struct rps_dev_flow_table *flow_table;
767 unsigned long val = 0;
768
769 rcu_read_lock();
770 flow_table = rcu_dereference(queue->rps_flow_table);
771 if (flow_table)
772 val = (unsigned long)flow_table->mask + 1;
773 rcu_read_unlock();
774
775 return sprintf(buf, "%lu\n", val);
776}
777
778static void rps_dev_flow_table_release(struct rcu_head *rcu)
779{
780 struct rps_dev_flow_table *table = container_of(rcu,
781 struct rps_dev_flow_table, rcu);
782 vfree(table);
783}
784
785static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
786 struct rx_queue_attribute *attr,
787 const char *buf, size_t len)
788{
789 unsigned long mask, count;
790 struct rps_dev_flow_table *table, *old_table;
791 static DEFINE_SPINLOCK(rps_dev_flow_lock);
792 int rc;
793
794 if (!capable(CAP_NET_ADMIN))
795 return -EPERM;
796
797 rc = kstrtoul(buf, 0, &count);
798 if (rc < 0)
799 return rc;
800
801 if (count) {
802 mask = count - 1;
803
804
805
806 while ((mask | (mask >> 1)) != mask)
807 mask |= (mask >> 1);
808
809
810
811
812#if BITS_PER_LONG > 32
813 if (mask > (unsigned long)(u32)mask)
814 return -EINVAL;
815#else
816 if (mask > (ULONG_MAX - RPS_DEV_FLOW_TABLE_SIZE(1))
817 / sizeof(struct rps_dev_flow)) {
818
819 return -EINVAL;
820 }
821#endif
822 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(mask + 1));
823 if (!table)
824 return -ENOMEM;
825
826 table->mask = mask;
827 for (count = 0; count <= mask; count++)
828 table->flows[count].cpu = RPS_NO_CPU;
829 } else
830 table = NULL;
831
832 spin_lock(&rps_dev_flow_lock);
833 old_table = rcu_dereference_protected(queue->rps_flow_table,
834 lockdep_is_held(&rps_dev_flow_lock));
835 rcu_assign_pointer(queue->rps_flow_table, table);
836 spin_unlock(&rps_dev_flow_lock);
837
838 if (old_table)
839 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
840
841 return len;
842}
843
844static struct rx_queue_attribute rps_cpus_attribute =
845 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
846
847
848static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
849 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
850 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
851#endif
852
853static struct attribute *rx_queue_default_attrs[] = {
854#ifdef CONFIG_RPS
855 &rps_cpus_attribute.attr,
856 &rps_dev_flow_table_cnt_attribute.attr,
857#endif
858 NULL
859};
860
861static void rx_queue_release(struct kobject *kobj)
862{
863 struct netdev_rx_queue *queue = to_rx_queue(kobj);
864#ifdef CONFIG_RPS
865 struct rps_map *map;
866 struct rps_dev_flow_table *flow_table;
867
868
869 map = rcu_dereference_protected(queue->rps_map, 1);
870 if (map) {
871 RCU_INIT_POINTER(queue->rps_map, NULL);
872 kfree_rcu(map, rcu);
873 }
874
875 flow_table = rcu_dereference_protected(queue->rps_flow_table, 1);
876 if (flow_table) {
877 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
878 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
879 }
880#endif
881
882 memset(kobj, 0, sizeof(*kobj));
883 dev_put(queue->dev);
884}
885
886static const void *rx_queue_namespace(struct kobject *kobj)
887{
888 struct netdev_rx_queue *queue = to_rx_queue(kobj);
889 struct device *dev = &queue->dev->dev;
890 const void *ns = NULL;
891
892 if (dev->class && dev->class->ns_type)
893 ns = dev->class->namespace(dev);
894
895 return ns;
896}
897
898static struct kobj_type rx_queue_ktype = {
899 .sysfs_ops = &rx_queue_sysfs_ops,
900 .release = rx_queue_release,
901 .default_attrs = rx_queue_default_attrs,
902 .namespace = rx_queue_namespace
903};
904
905static int rx_queue_add_kobject(struct net_device *dev, int index)
906{
907 struct netdev_rx_queue *queue = dev->_rx + index;
908 struct kobject *kobj = &queue->kobj;
909 int error = 0;
910
911 kobj->kset = dev->queues_kset;
912 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
913 "rx-%u", index);
914 if (error)
915 goto exit;
916
917 if (dev->sysfs_rx_queue_group) {
918 error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group);
919 if (error)
920 goto exit;
921 }
922
923 kobject_uevent(kobj, KOBJ_ADD);
924 dev_hold(queue->dev);
925
926 return error;
927exit:
928 kobject_put(kobj);
929 return error;
930}
931#endif
932
933int
934net_rx_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
935{
936#ifdef CONFIG_SYSFS
937 int i;
938 int error = 0;
939
940#ifndef CONFIG_RPS
941 if (!dev->sysfs_rx_queue_group)
942 return 0;
943#endif
944 for (i = old_num; i < new_num; i++) {
945 error = rx_queue_add_kobject(dev, i);
946 if (error) {
947 new_num = old_num;
948 break;
949 }
950 }
951
952 while (--i >= new_num) {
953 struct kobject *kobj = &dev->_rx[i].kobj;
954
955 if (!list_empty(&dev_net(dev)->exit_list))
956 kobj->uevent_suppress = 1;
957 if (dev->sysfs_rx_queue_group)
958 sysfs_remove_group(kobj, dev->sysfs_rx_queue_group);
959 kobject_put(kobj);
960 }
961
962 return error;
963#else
964 return 0;
965#endif
966}
967
968#ifdef CONFIG_SYSFS
969
970
971
972struct netdev_queue_attribute {
973 struct attribute attr;
974 ssize_t (*show)(struct netdev_queue *queue,
975 struct netdev_queue_attribute *attr, char *buf);
976 ssize_t (*store)(struct netdev_queue *queue,
977 struct netdev_queue_attribute *attr, const char *buf, size_t len);
978};
979#define to_netdev_queue_attr(_attr) container_of(_attr, \
980 struct netdev_queue_attribute, attr)
981
982#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
983
984static ssize_t netdev_queue_attr_show(struct kobject *kobj,
985 struct attribute *attr, char *buf)
986{
987 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
988 struct netdev_queue *queue = to_netdev_queue(kobj);
989
990 if (!attribute->show)
991 return -EIO;
992
993 return attribute->show(queue, attribute, buf);
994}
995
996static ssize_t netdev_queue_attr_store(struct kobject *kobj,
997 struct attribute *attr,
998 const char *buf, size_t count)
999{
1000 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
1001 struct netdev_queue *queue = to_netdev_queue(kobj);
1002
1003 if (!attribute->store)
1004 return -EIO;
1005
1006 return attribute->store(queue, attribute, buf, count);
1007}
1008
1009static const struct sysfs_ops netdev_queue_sysfs_ops = {
1010 .show = netdev_queue_attr_show,
1011 .store = netdev_queue_attr_store,
1012};
1013
1014static ssize_t show_trans_timeout(struct netdev_queue *queue,
1015 struct netdev_queue_attribute *attribute,
1016 char *buf)
1017{
1018 unsigned long trans_timeout;
1019
1020 spin_lock_irq(&queue->_xmit_lock);
1021 trans_timeout = queue->trans_timeout;
1022 spin_unlock_irq(&queue->_xmit_lock);
1023
1024 return sprintf(buf, "%lu", trans_timeout);
1025}
1026
1027static unsigned int get_netdev_queue_index(struct netdev_queue *queue)
1028{
1029 struct net_device *dev = queue->dev;
1030 unsigned int i;
1031
1032 i = queue - dev->_tx;
1033 BUG_ON(i >= dev->num_tx_queues);
1034
1035 return i;
1036}
1037
1038static ssize_t show_traffic_class(struct netdev_queue *queue,
1039 struct netdev_queue_attribute *attribute,
1040 char *buf)
1041{
1042 struct net_device *dev = queue->dev;
1043 int index = get_netdev_queue_index(queue);
1044 int tc = netdev_txq_to_tc(dev, index);
1045
1046 if (tc < 0)
1047 return -EINVAL;
1048
1049 return sprintf(buf, "%u\n", tc);
1050}
1051
1052#ifdef CONFIG_XPS
1053static ssize_t show_tx_maxrate(struct netdev_queue *queue,
1054 struct netdev_queue_attribute *attribute,
1055 char *buf)
1056{
1057 return sprintf(buf, "%lu\n", queue->tx_maxrate);
1058}
1059
1060static ssize_t set_tx_maxrate(struct netdev_queue *queue,
1061 struct netdev_queue_attribute *attribute,
1062 const char *buf, size_t len)
1063{
1064 struct net_device *dev = queue->dev;
1065 int err, index = get_netdev_queue_index(queue);
1066 u32 rate = 0;
1067
1068 err = kstrtou32(buf, 10, &rate);
1069 if (err < 0)
1070 return err;
1071
1072 if (!rtnl_trylock())
1073 return restart_syscall();
1074
1075 err = -EOPNOTSUPP;
1076 if (dev->netdev_ops->ndo_set_tx_maxrate)
1077 err = dev->netdev_ops->ndo_set_tx_maxrate(dev, index, rate);
1078
1079 rtnl_unlock();
1080 if (!err) {
1081 queue->tx_maxrate = rate;
1082 return len;
1083 }
1084 return err;
1085}
1086
1087static struct netdev_queue_attribute queue_tx_maxrate =
1088 __ATTR(tx_maxrate, S_IRUGO | S_IWUSR,
1089 show_tx_maxrate, set_tx_maxrate);
1090#endif
1091
1092static struct netdev_queue_attribute queue_trans_timeout =
1093 __ATTR(tx_timeout, S_IRUGO, show_trans_timeout, NULL);
1094
1095static struct netdev_queue_attribute queue_traffic_class =
1096 __ATTR(traffic_class, S_IRUGO, show_traffic_class, NULL);
1097
1098#ifdef CONFIG_BQL
1099
1100
1101
1102static ssize_t bql_show(char *buf, unsigned int value)
1103{
1104 return sprintf(buf, "%u\n", value);
1105}
1106
1107static ssize_t bql_set(const char *buf, const size_t count,
1108 unsigned int *pvalue)
1109{
1110 unsigned int value;
1111 int err;
1112
1113 if (!strcmp(buf, "max") || !strcmp(buf, "max\n"))
1114 value = DQL_MAX_LIMIT;
1115 else {
1116 err = kstrtouint(buf, 10, &value);
1117 if (err < 0)
1118 return err;
1119 if (value > DQL_MAX_LIMIT)
1120 return -EINVAL;
1121 }
1122
1123 *pvalue = value;
1124
1125 return count;
1126}
1127
1128static ssize_t bql_show_hold_time(struct netdev_queue *queue,
1129 struct netdev_queue_attribute *attr,
1130 char *buf)
1131{
1132 struct dql *dql = &queue->dql;
1133
1134 return sprintf(buf, "%u\n", jiffies_to_msecs(dql->slack_hold_time));
1135}
1136
1137static ssize_t bql_set_hold_time(struct netdev_queue *queue,
1138 struct netdev_queue_attribute *attribute,
1139 const char *buf, size_t len)
1140{
1141 struct dql *dql = &queue->dql;
1142 unsigned int value;
1143 int err;
1144
1145 err = kstrtouint(buf, 10, &value);
1146 if (err < 0)
1147 return err;
1148
1149 dql->slack_hold_time = msecs_to_jiffies(value);
1150
1151 return len;
1152}
1153
1154static struct netdev_queue_attribute bql_hold_time_attribute =
1155 __ATTR(hold_time, S_IRUGO | S_IWUSR, bql_show_hold_time,
1156 bql_set_hold_time);
1157
1158static ssize_t bql_show_inflight(struct netdev_queue *queue,
1159 struct netdev_queue_attribute *attr,
1160 char *buf)
1161{
1162 struct dql *dql = &queue->dql;
1163
1164 return sprintf(buf, "%u\n", dql->num_queued - dql->num_completed);
1165}
1166
1167static struct netdev_queue_attribute bql_inflight_attribute =
1168 __ATTR(inflight, S_IRUGO, bql_show_inflight, NULL);
1169
1170#define BQL_ATTR(NAME, FIELD) \
1171static ssize_t bql_show_ ## NAME(struct netdev_queue *queue, \
1172 struct netdev_queue_attribute *attr, \
1173 char *buf) \
1174{ \
1175 return bql_show(buf, queue->dql.FIELD); \
1176} \
1177 \
1178static ssize_t bql_set_ ## NAME(struct netdev_queue *queue, \
1179 struct netdev_queue_attribute *attr, \
1180 const char *buf, size_t len) \
1181{ \
1182 return bql_set(buf, len, &queue->dql.FIELD); \
1183} \
1184 \
1185static struct netdev_queue_attribute bql_ ## NAME ## _attribute = \
1186 __ATTR(NAME, S_IRUGO | S_IWUSR, bql_show_ ## NAME, \
1187 bql_set_ ## NAME);
1188
1189BQL_ATTR(limit, limit)
1190BQL_ATTR(limit_max, max_limit)
1191BQL_ATTR(limit_min, min_limit)
1192
1193static struct attribute *dql_attrs[] = {
1194 &bql_limit_attribute.attr,
1195 &bql_limit_max_attribute.attr,
1196 &bql_limit_min_attribute.attr,
1197 &bql_hold_time_attribute.attr,
1198 &bql_inflight_attribute.attr,
1199 NULL
1200};
1201
1202static struct attribute_group dql_group = {
1203 .name = "byte_queue_limits",
1204 .attrs = dql_attrs,
1205};
1206#endif
1207
1208#ifdef CONFIG_XPS
1209static ssize_t show_xps_map(struct netdev_queue *queue,
1210 struct netdev_queue_attribute *attribute, char *buf)
1211{
1212 struct net_device *dev = queue->dev;
1213 int cpu, len, num_tc = 1, tc = 0;
1214 struct xps_dev_maps *dev_maps;
1215 cpumask_var_t mask;
1216 unsigned long index;
1217
1218 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
1219 return -ENOMEM;
1220
1221 index = get_netdev_queue_index(queue);
1222
1223 if (dev->num_tc) {
1224 num_tc = dev->num_tc;
1225 tc = netdev_txq_to_tc(dev, index);
1226 if (tc < 0)
1227 return -EINVAL;
1228 }
1229
1230 rcu_read_lock();
1231 dev_maps = rcu_dereference(dev->xps_maps);
1232 if (dev_maps) {
1233 for_each_possible_cpu(cpu) {
1234 int i, tci = cpu * num_tc + tc;
1235 struct xps_map *map;
1236
1237 map = rcu_dereference(dev_maps->cpu_map[tci]);
1238 if (!map)
1239 continue;
1240
1241 for (i = map->len; i--;) {
1242 if (map->queues[i] == index) {
1243 cpumask_set_cpu(cpu, mask);
1244 break;
1245 }
1246 }
1247 }
1248 }
1249 rcu_read_unlock();
1250
1251 len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
1252 free_cpumask_var(mask);
1253 return len < PAGE_SIZE ? len : -EINVAL;
1254}
1255
1256static ssize_t store_xps_map(struct netdev_queue *queue,
1257 struct netdev_queue_attribute *attribute,
1258 const char *buf, size_t len)
1259{
1260 struct net_device *dev = queue->dev;
1261 unsigned long index;
1262 cpumask_var_t mask;
1263 int err;
1264
1265 if (!capable(CAP_NET_ADMIN))
1266 return -EPERM;
1267
1268 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
1269 return -ENOMEM;
1270
1271 index = get_netdev_queue_index(queue);
1272
1273 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
1274 if (err) {
1275 free_cpumask_var(mask);
1276 return err;
1277 }
1278
1279 err = netif_set_xps_queue(dev, mask, index);
1280
1281 free_cpumask_var(mask);
1282
1283 return err ? : len;
1284}
1285
1286static struct netdev_queue_attribute xps_cpus_attribute =
1287 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
1288#endif
1289
1290static struct attribute *netdev_queue_default_attrs[] = {
1291 &queue_trans_timeout.attr,
1292 &queue_traffic_class.attr,
1293#ifdef CONFIG_XPS
1294 &xps_cpus_attribute.attr,
1295 &queue_tx_maxrate.attr,
1296#endif
1297 NULL
1298};
1299
1300static void netdev_queue_release(struct kobject *kobj)
1301{
1302 struct netdev_queue *queue = to_netdev_queue(kobj);
1303
1304 memset(kobj, 0, sizeof(*kobj));
1305 dev_put(queue->dev);
1306}
1307
1308static const void *netdev_queue_namespace(struct kobject *kobj)
1309{
1310 struct netdev_queue *queue = to_netdev_queue(kobj);
1311 struct device *dev = &queue->dev->dev;
1312 const void *ns = NULL;
1313
1314 if (dev->class && dev->class->ns_type)
1315 ns = dev->class->namespace(dev);
1316
1317 return ns;
1318}
1319
1320static struct kobj_type netdev_queue_ktype = {
1321 .sysfs_ops = &netdev_queue_sysfs_ops,
1322 .release = netdev_queue_release,
1323 .default_attrs = netdev_queue_default_attrs,
1324 .namespace = netdev_queue_namespace,
1325};
1326
1327static int netdev_queue_add_kobject(struct net_device *dev, int index)
1328{
1329 struct netdev_queue *queue = dev->_tx + index;
1330 struct kobject *kobj = &queue->kobj;
1331 int error = 0;
1332
1333 kobj->kset = dev->queues_kset;
1334 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1335 "tx-%u", index);
1336 if (error)
1337 goto exit;
1338
1339#ifdef CONFIG_BQL
1340 error = sysfs_create_group(kobj, &dql_group);
1341 if (error)
1342 goto exit;
1343#endif
1344
1345 kobject_uevent(kobj, KOBJ_ADD);
1346 dev_hold(queue->dev);
1347
1348 return 0;
1349exit:
1350 kobject_put(kobj);
1351 return error;
1352}
1353#endif
1354
1355int
1356netdev_queue_update_kobjects(struct net_device *dev, int old_num, int new_num)
1357{
1358#ifdef CONFIG_SYSFS
1359 int i;
1360 int error = 0;
1361
1362 for (i = old_num; i < new_num; i++) {
1363 error = netdev_queue_add_kobject(dev, i);
1364 if (error) {
1365 new_num = old_num;
1366 break;
1367 }
1368 }
1369
1370 while (--i >= new_num) {
1371 struct netdev_queue *queue = dev->_tx + i;
1372
1373 if (!list_empty(&dev_net(dev)->exit_list))
1374 queue->kobj.uevent_suppress = 1;
1375#ifdef CONFIG_BQL
1376 sysfs_remove_group(&queue->kobj, &dql_group);
1377#endif
1378 kobject_put(&queue->kobj);
1379 }
1380
1381 return error;
1382#else
1383 return 0;
1384#endif
1385}
1386
1387static int register_queue_kobjects(struct net_device *dev)
1388{
1389 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
1390
1391#ifdef CONFIG_SYSFS
1392 dev->queues_kset = kset_create_and_add("queues",
1393 NULL, &dev->dev.kobj);
1394 if (!dev->queues_kset)
1395 return -ENOMEM;
1396 real_rx = dev->real_num_rx_queues;
1397#endif
1398 real_tx = dev->real_num_tx_queues;
1399
1400 error = net_rx_queue_update_kobjects(dev, 0, real_rx);
1401 if (error)
1402 goto error;
1403 rxq = real_rx;
1404
1405 error = netdev_queue_update_kobjects(dev, 0, real_tx);
1406 if (error)
1407 goto error;
1408 txq = real_tx;
1409
1410 return 0;
1411
1412error:
1413 netdev_queue_update_kobjects(dev, txq, 0);
1414 net_rx_queue_update_kobjects(dev, rxq, 0);
1415 return error;
1416}
1417
1418static void remove_queue_kobjects(struct net_device *dev)
1419{
1420 int real_rx = 0, real_tx = 0;
1421
1422#ifdef CONFIG_SYSFS
1423 real_rx = dev->real_num_rx_queues;
1424#endif
1425 real_tx = dev->real_num_tx_queues;
1426
1427 net_rx_queue_update_kobjects(dev, real_rx, 0);
1428 netdev_queue_update_kobjects(dev, real_tx, 0);
1429#ifdef CONFIG_SYSFS
1430 kset_unregister(dev->queues_kset);
1431#endif
1432}
1433
1434static bool net_current_may_mount(void)
1435{
1436 struct net *net = current->nsproxy->net_ns;
1437
1438 return ns_capable(net->user_ns, CAP_SYS_ADMIN);
1439}
1440
1441static void *net_grab_current_ns(void)
1442{
1443 struct net *ns = current->nsproxy->net_ns;
1444#ifdef CONFIG_NET_NS
1445 if (ns)
1446 atomic_inc(&ns->passive);
1447#endif
1448 return ns;
1449}
1450
1451static const void *net_initial_ns(void)
1452{
1453 return &init_net;
1454}
1455
1456static const void *net_netlink_ns(struct sock *sk)
1457{
1458 return sock_net(sk);
1459}
1460
1461struct kobj_ns_type_operations net_ns_type_operations = {
1462 .type = KOBJ_NS_TYPE_NET,
1463 .current_may_mount = net_current_may_mount,
1464 .grab_current_ns = net_grab_current_ns,
1465 .netlink_ns = net_netlink_ns,
1466 .initial_ns = net_initial_ns,
1467 .drop_ns = net_drop_ns,
1468};
1469EXPORT_SYMBOL_GPL(net_ns_type_operations);
1470
1471static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
1472{
1473 struct net_device *dev = to_net_dev(d);
1474 int retval;
1475
1476
1477 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
1478 if (retval)
1479 goto exit;
1480
1481
1482
1483
1484 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1485
1486exit:
1487 return retval;
1488}
1489
1490
1491
1492
1493
1494static void netdev_release(struct device *d)
1495{
1496 struct net_device *dev = to_net_dev(d);
1497
1498 BUG_ON(dev->reg_state != NETREG_RELEASED);
1499
1500 kfree(dev->ifalias);
1501 netdev_freemem(dev);
1502}
1503
1504static const void *net_namespace(struct device *d)
1505{
1506 struct net_device *dev = to_net_dev(d);
1507
1508 return dev_net(dev);
1509}
1510
1511static struct class net_class = {
1512 .name = "net",
1513 .dev_release = netdev_release,
1514 .dev_groups = net_class_groups,
1515 .dev_uevent = netdev_uevent,
1516 .ns_type = &net_ns_type_operations,
1517 .namespace = net_namespace,
1518};
1519
1520#ifdef CONFIG_OF_NET
1521static int of_dev_node_match(struct device *dev, const void *data)
1522{
1523 int ret = 0;
1524
1525 if (dev->parent)
1526 ret = dev->parent->of_node == data;
1527
1528 return ret == 0 ? dev->of_node == data : ret;
1529}
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540struct net_device *of_find_net_device_by_node(struct device_node *np)
1541{
1542 struct device *dev;
1543
1544 dev = class_find_device(&net_class, NULL, np, of_dev_node_match);
1545 if (!dev)
1546 return NULL;
1547
1548 return to_net_dev(dev);
1549}
1550EXPORT_SYMBOL(of_find_net_device_by_node);
1551#endif
1552
1553
1554
1555
1556void netdev_unregister_kobject(struct net_device *ndev)
1557{
1558 struct device *dev = &(ndev->dev);
1559
1560 if (!list_empty(&dev_net(ndev)->exit_list))
1561 dev_set_uevent_suppress(dev, 1);
1562
1563 kobject_get(&dev->kobj);
1564
1565 remove_queue_kobjects(ndev);
1566
1567 pm_runtime_set_memalloc_noio(dev, false);
1568
1569 device_del(dev);
1570}
1571
1572
1573int netdev_register_kobject(struct net_device *ndev)
1574{
1575 struct device *dev = &(ndev->dev);
1576 const struct attribute_group **groups = ndev->sysfs_groups;
1577 int error = 0;
1578
1579 device_initialize(dev);
1580 dev->class = &net_class;
1581 dev->platform_data = ndev;
1582 dev->groups = groups;
1583
1584 dev_set_name(dev, "%s", ndev->name);
1585
1586#ifdef CONFIG_SYSFS
1587
1588 if (*groups)
1589 groups++;
1590
1591 *groups++ = &netstat_group;
1592
1593#if IS_ENABLED(CONFIG_WIRELESS_EXT) || IS_ENABLED(CONFIG_CFG80211)
1594 if (ndev->ieee80211_ptr)
1595 *groups++ = &wireless_group;
1596#if IS_ENABLED(CONFIG_WIRELESS_EXT)
1597 else if (ndev->wireless_handlers)
1598 *groups++ = &wireless_group;
1599#endif
1600#endif
1601#endif
1602
1603 error = device_add(dev);
1604 if (error)
1605 return error;
1606
1607 error = register_queue_kobjects(ndev);
1608 if (error) {
1609 device_del(dev);
1610 return error;
1611 }
1612
1613 pm_runtime_set_memalloc_noio(dev, true);
1614
1615 return error;
1616}
1617
1618int netdev_class_create_file_ns(struct class_attribute *class_attr,
1619 const void *ns)
1620{
1621 return class_create_file_ns(&net_class, class_attr, ns);
1622}
1623EXPORT_SYMBOL(netdev_class_create_file_ns);
1624
1625void netdev_class_remove_file_ns(struct class_attribute *class_attr,
1626 const void *ns)
1627{
1628 class_remove_file_ns(&net_class, class_attr, ns);
1629}
1630EXPORT_SYMBOL(netdev_class_remove_file_ns);
1631
1632int __init netdev_kobject_init(void)
1633{
1634 kobj_ns_type_register(&net_ns_type_operations);
1635 return class_register(&net_class);
1636}
1637
