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1/*
2 * net-sysfs.c - network device class and attributes
3 *
4 * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/capability.h>
13#include <linux/kernel.h>
14#include <linux/netdevice.h>
15#include <linux/if_arp.h>
16#include <linux/slab.h>
17#include <linux/nsproxy.h>
18#include <net/sock.h>
19#include <net/net_namespace.h>
20#include <linux/rtnetlink.h>
21#include <linux/wireless.h>
22#include <linux/vmalloc.h>
23#include <net/wext.h>
24
25#include "net-sysfs.h"
26
27#ifdef CONFIG_SYSFS
28static const char fmt_hex[] = "%#x\n";
29static const char fmt_long_hex[] = "%#lx\n";
30static const char fmt_dec[] = "%d\n";
31static const char fmt_udec[] = "%u\n";
32static const char fmt_ulong[] = "%lu\n";
33static const char fmt_u64[] = "%llu\n";
34
35static inline int dev_isalive(const struct net_device *dev)
36{
37 return dev->reg_state <= NETREG_REGISTERED;
38}
39
40/* use same locking rules as GIF* ioctl's */
41static ssize_t netdev_show(const struct device *dev,
42 struct device_attribute *attr, char *buf,
43 ssize_t (*format)(const struct net_device *, char *))
44{
45 struct net_device *net = to_net_dev(dev);
46 ssize_t ret = -EINVAL;
47
48 read_lock(&dev_base_lock);
49 if (dev_isalive(net))
50 ret = (*format)(net, buf);
51 read_unlock(&dev_base_lock);
52
53 return ret;
54}
55
56/* generate a show function for simple field */
57#define NETDEVICE_SHOW(field, format_string) \
58static ssize_t format_##field(const struct net_device *net, char *buf) \
59{ \
60 return sprintf(buf, format_string, net->field); \
61} \
62static ssize_t show_##field(struct device *dev, \
63 struct device_attribute *attr, char *buf) \
64{ \
65 return netdev_show(dev, attr, buf, format_##field); \
66}
67
68
69/* use same locking and permission rules as SIF* ioctl's */
70static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
71 const char *buf, size_t len,
72 int (*set)(struct net_device *, unsigned long))
73{
74 struct net_device *net = to_net_dev(dev);
75 char *endp;
76 unsigned long new;
77 int ret = -EINVAL;
78
79 if (!capable(CAP_NET_ADMIN))
80 return -EPERM;
81
82 new = simple_strtoul(buf, &endp, 0);
83 if (endp == buf)
84 goto err;
85
86 if (!rtnl_trylock())
87 return restart_syscall();
88
89 if (dev_isalive(net)) {
90 if ((ret = (*set)(net, new)) == 0)
91 ret = len;
92 }
93 rtnl_unlock();
94 err:
95 return ret;
96}
97
98NETDEVICE_SHOW(dev_id, fmt_hex);
99NETDEVICE_SHOW(addr_assign_type, fmt_dec);
100NETDEVICE_SHOW(addr_len, fmt_dec);
101NETDEVICE_SHOW(iflink, fmt_dec);
102NETDEVICE_SHOW(ifindex, fmt_dec);
103NETDEVICE_SHOW(type, fmt_dec);
104NETDEVICE_SHOW(link_mode, fmt_dec);
105
106/* use same locking rules as GIFHWADDR ioctl's */
107static ssize_t show_address(struct device *dev, struct device_attribute *attr,
108 char *buf)
109{
110 struct net_device *net = to_net_dev(dev);
111 ssize_t ret = -EINVAL;
112
113 read_lock(&dev_base_lock);
114 if (dev_isalive(net))
115 ret = sysfs_format_mac(buf, net->dev_addr, net->addr_len);
116 read_unlock(&dev_base_lock);
117 return ret;
118}
119
120static ssize_t show_broadcast(struct device *dev,
121 struct device_attribute *attr, char *buf)
122{
123 struct net_device *net = to_net_dev(dev);
124 if (dev_isalive(net))
125 return sysfs_format_mac(buf, net->broadcast, net->addr_len);
126 return -EINVAL;
127}
128
129static ssize_t show_carrier(struct device *dev,
130 struct device_attribute *attr, char *buf)
131{
132 struct net_device *netdev = to_net_dev(dev);
133 if (netif_running(netdev)) {
134 return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
135 }
136 return -EINVAL;
137}
138
139static ssize_t show_speed(struct device *dev,
140 struct device_attribute *attr, char *buf)
141{
142 struct net_device *netdev = to_net_dev(dev);
143 int ret = -EINVAL;
144
145 if (!rtnl_trylock())
146 return restart_syscall();
147
148 if (netif_running(netdev)) {
149 struct ethtool_cmd cmd;
150 if (!dev_ethtool_get_settings(netdev, &cmd))
151 ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd));
152 }
153 rtnl_unlock();
154 return ret;
155}
156
157static ssize_t show_duplex(struct device *dev,
158 struct device_attribute *attr, char *buf)
159{
160 struct net_device *netdev = to_net_dev(dev);
161 int ret = -EINVAL;
162
163 if (!rtnl_trylock())
164 return restart_syscall();
165
166 if (netif_running(netdev)) {
167 struct ethtool_cmd cmd;
168 if (!dev_ethtool_get_settings(netdev, &cmd))
169 ret = sprintf(buf, "%s\n",
170 cmd.duplex ? "full" : "half");
171 }
172 rtnl_unlock();
173 return ret;
174}
175
176static ssize_t show_dormant(struct device *dev,
177 struct device_attribute *attr, char *buf)
178{
179 struct net_device *netdev = to_net_dev(dev);
180
181 if (netif_running(netdev))
182 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
183
184 return -EINVAL;
185}
186
187static const char *const operstates[] = {
188 "unknown",
189 "notpresent", /* currently unused */
190 "down",
191 "lowerlayerdown",
192 "testing", /* currently unused */
193 "dormant",
194 "up"
195};
196
197static ssize_t show_operstate(struct device *dev,
198 struct device_attribute *attr, char *buf)
199{
200 const struct net_device *netdev = to_net_dev(dev);
201 unsigned char operstate;
202
203 read_lock(&dev_base_lock);
204 operstate = netdev->operstate;
205 if (!netif_running(netdev))
206 operstate = IF_OPER_DOWN;
207 read_unlock(&dev_base_lock);
208
209 if (operstate >= ARRAY_SIZE(operstates))
210 return -EINVAL; /* should not happen */
211
212 return sprintf(buf, "%s\n", operstates[operstate]);
213}
214
215/* read-write attributes */
216NETDEVICE_SHOW(mtu, fmt_dec);
217
218static int change_mtu(struct net_device *net, unsigned long new_mtu)
219{
220 return dev_set_mtu(net, (int) new_mtu);
221}
222
223static ssize_t store_mtu(struct device *dev, struct device_attribute *attr,
224 const char *buf, size_t len)
225{
226 return netdev_store(dev, attr, buf, len, change_mtu);
227}
228
229NETDEVICE_SHOW(flags, fmt_hex);
230
231static int change_flags(struct net_device *net, unsigned long new_flags)
232{
233 return dev_change_flags(net, (unsigned) new_flags);
234}
235
236static ssize_t store_flags(struct device *dev, struct device_attribute *attr,
237 const char *buf, size_t len)
238{
239 return netdev_store(dev, attr, buf, len, change_flags);
240}
241
242NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
243
244static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
245{
246 net->tx_queue_len = new_len;
247 return 0;
248}
249
250static ssize_t store_tx_queue_len(struct device *dev,
251 struct device_attribute *attr,
252 const char *buf, size_t len)
253{
254 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
255}
256
257static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,
258 const char *buf, size_t len)
259{
260 struct net_device *netdev = to_net_dev(dev);
261 size_t count = len;
262 ssize_t ret;
263
264 if (!capable(CAP_NET_ADMIN))
265 return -EPERM;
266
267 /* ignore trailing newline */
268 if (len > 0 && buf[len - 1] == '\n')
269 --count;
270
271 if (!rtnl_trylock())
272 return restart_syscall();
273 ret = dev_set_alias(netdev, buf, count);
274 rtnl_unlock();
275
276 return ret < 0 ? ret : len;
277}
278
279static ssize_t show_ifalias(struct device *dev,
280 struct device_attribute *attr, char *buf)
281{
282 const struct net_device *netdev = to_net_dev(dev);
283 ssize_t ret = 0;
284
285 if (!rtnl_trylock())
286 return restart_syscall();
287 if (netdev->ifalias)
288 ret = sprintf(buf, "%s\n", netdev->ifalias);
289 rtnl_unlock();
290 return ret;
291}
292
293NETDEVICE_SHOW(group, fmt_dec);
294
295static int change_group(struct net_device *net, unsigned long new_group)
296{
297 dev_set_group(net, (int) new_group);
298 return 0;
299}
300
301static ssize_t store_group(struct device *dev, struct device_attribute *attr,
302 const char *buf, size_t len)
303{
304 return netdev_store(dev, attr, buf, len, change_group);
305}
306
307static struct device_attribute net_class_attributes[] = {
308 __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
309 __ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
310 __ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
311 __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
312 __ATTR(iflink, S_IRUGO, show_iflink, NULL),
313 __ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
314 __ATTR(type, S_IRUGO, show_type, NULL),
315 __ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
316 __ATTR(address, S_IRUGO, show_address, NULL),
317 __ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
318 __ATTR(carrier, S_IRUGO, show_carrier, NULL),
319 __ATTR(speed, S_IRUGO, show_speed, NULL),
320 __ATTR(duplex, S_IRUGO, show_duplex, NULL),
321 __ATTR(dormant, S_IRUGO, show_dormant, NULL),
322 __ATTR(operstate, S_IRUGO, show_operstate, NULL),
323 __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
324 __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
325 __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
326 store_tx_queue_len),
327 __ATTR(netdev_group, S_IRUGO | S_IWUSR, show_group, store_group),
328 {}
329};
330
331/* Show a given an attribute in the statistics group */
332static ssize_t netstat_show(const struct device *d,
333 struct device_attribute *attr, char *buf,
334 unsigned long offset)
335{
336 struct net_device *dev = to_net_dev(d);
337 ssize_t ret = -EINVAL;
338
339 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
340 offset % sizeof(u64) != 0);
341
342 read_lock(&dev_base_lock);
343 if (dev_isalive(dev)) {
344 struct rtnl_link_stats64 temp;
345 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
346
347 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
348 }
349 read_unlock(&dev_base_lock);
350 return ret;
351}
352
353/* generate a read-only statistics attribute */
354#define NETSTAT_ENTRY(name) \
355static ssize_t show_##name(struct device *d, \
356 struct device_attribute *attr, char *buf) \
357{ \
358 return netstat_show(d, attr, buf, \
359 offsetof(struct rtnl_link_stats64, name)); \
360} \
361static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
362
363NETSTAT_ENTRY(rx_packets);
364NETSTAT_ENTRY(tx_packets);
365NETSTAT_ENTRY(rx_bytes);
366NETSTAT_ENTRY(tx_bytes);
367NETSTAT_ENTRY(rx_errors);
368NETSTAT_ENTRY(tx_errors);
369NETSTAT_ENTRY(rx_dropped);
370NETSTAT_ENTRY(tx_dropped);
371NETSTAT_ENTRY(multicast);
372NETSTAT_ENTRY(collisions);
373NETSTAT_ENTRY(rx_length_errors);
374NETSTAT_ENTRY(rx_over_errors);
375NETSTAT_ENTRY(rx_crc_errors);
376NETSTAT_ENTRY(rx_frame_errors);
377NETSTAT_ENTRY(rx_fifo_errors);
378NETSTAT_ENTRY(rx_missed_errors);
379NETSTAT_ENTRY(tx_aborted_errors);
380NETSTAT_ENTRY(tx_carrier_errors);
381NETSTAT_ENTRY(tx_fifo_errors);
382NETSTAT_ENTRY(tx_heartbeat_errors);
383NETSTAT_ENTRY(tx_window_errors);
384NETSTAT_ENTRY(rx_compressed);
385NETSTAT_ENTRY(tx_compressed);
386
387static struct attribute *netstat_attrs[] = {
388 &dev_attr_rx_packets.attr,
389 &dev_attr_tx_packets.attr,
390 &dev_attr_rx_bytes.attr,
391 &dev_attr_tx_bytes.attr,
392 &dev_attr_rx_errors.attr,
393 &dev_attr_tx_errors.attr,
394 &dev_attr_rx_dropped.attr,
395 &dev_attr_tx_dropped.attr,
396 &dev_attr_multicast.attr,
397 &dev_attr_collisions.attr,
398 &dev_attr_rx_length_errors.attr,
399 &dev_attr_rx_over_errors.attr,
400 &dev_attr_rx_crc_errors.attr,
401 &dev_attr_rx_frame_errors.attr,
402 &dev_attr_rx_fifo_errors.attr,
403 &dev_attr_rx_missed_errors.attr,
404 &dev_attr_tx_aborted_errors.attr,
405 &dev_attr_tx_carrier_errors.attr,
406 &dev_attr_tx_fifo_errors.attr,
407 &dev_attr_tx_heartbeat_errors.attr,
408 &dev_attr_tx_window_errors.attr,
409 &dev_attr_rx_compressed.attr,
410 &dev_attr_tx_compressed.attr,
411 NULL
412};
413
414
415static struct attribute_group netstat_group = {
416 .name = "statistics",
417 .attrs = netstat_attrs,
418};
419
420#ifdef CONFIG_WIRELESS_EXT_SYSFS
421/* helper function that does all the locking etc for wireless stats */
422static ssize_t wireless_show(struct device *d, char *buf,
423 ssize_t (*format)(const struct iw_statistics *,
424 char *))
425{
426 struct net_device *dev = to_net_dev(d);
427 const struct iw_statistics *iw;
428 ssize_t ret = -EINVAL;
429
430 if (!rtnl_trylock())
431 return restart_syscall();
432 if (dev_isalive(dev)) {
433 iw = get_wireless_stats(dev);
434 if (iw)
435 ret = (*format)(iw, buf);
436 }
437 rtnl_unlock();
438
439 return ret;
440}
441
442/* show function template for wireless fields */
443#define WIRELESS_SHOW(name, field, format_string) \
444static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
445{ \
446 return sprintf(buf, format_string, iw->field); \
447} \
448static ssize_t show_iw_##name(struct device *d, \
449 struct device_attribute *attr, char *buf) \
450{ \
451 return wireless_show(d, buf, format_iw_##name); \
452} \
453static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
454
455WIRELESS_SHOW(status, status, fmt_hex);
456WIRELESS_SHOW(link, qual.qual, fmt_dec);
457WIRELESS_SHOW(level, qual.level, fmt_dec);
458WIRELESS_SHOW(noise, qual.noise, fmt_dec);
459WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
460WIRELESS_SHOW(crypt, discard.code, fmt_dec);
461WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
462WIRELESS_SHOW(misc, discard.misc, fmt_dec);
463WIRELESS_SHOW(retries, discard.retries, fmt_dec);
464WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
465
466static struct attribute *wireless_attrs[] = {
467 &dev_attr_status.attr,
468 &dev_attr_link.attr,
469 &dev_attr_level.attr,
470 &dev_attr_noise.attr,
471 &dev_attr_nwid.attr,
472 &dev_attr_crypt.attr,
473 &dev_attr_fragment.attr,
474 &dev_attr_retries.attr,
475 &dev_attr_misc.attr,
476 &dev_attr_beacon.attr,
477 NULL
478};
479
480static struct attribute_group wireless_group = {
481 .name = "wireless",
482 .attrs = wireless_attrs,
483};
484#endif
485#endif /* CONFIG_SYSFS */
486
487#ifdef CONFIG_RPS
488/*
489 * RX queue sysfs structures and functions.
490 */
491struct rx_queue_attribute {
492 struct attribute attr;
493 ssize_t (*show)(struct netdev_rx_queue *queue,
494 struct rx_queue_attribute *attr, char *buf);
495 ssize_t (*store)(struct netdev_rx_queue *queue,
496 struct rx_queue_attribute *attr, const char *buf, size_t len);
497};
498#define to_rx_queue_attr(_attr) container_of(_attr, \
499 struct rx_queue_attribute, attr)
500
501#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
502
503static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
504 char *buf)
505{
506 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
507 struct netdev_rx_queue *queue = to_rx_queue(kobj);
508
509 if (!attribute->show)
510 return -EIO;
511
512 return attribute->show(queue, attribute, buf);
513}
514
515static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
516 const char *buf, size_t count)
517{
518 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
519 struct netdev_rx_queue *queue = to_rx_queue(kobj);
520
521 if (!attribute->store)
522 return -EIO;
523
524 return attribute->store(queue, attribute, buf, count);
525}
526
527static const struct sysfs_ops rx_queue_sysfs_ops = {
528 .show = rx_queue_attr_show,
529 .store = rx_queue_attr_store,
530};
531
532static ssize_t show_rps_map(struct netdev_rx_queue *queue,
533 struct rx_queue_attribute *attribute, char *buf)
534{
535 struct rps_map *map;
536 cpumask_var_t mask;
537 size_t len = 0;
538 int i;
539
540 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
541 return -ENOMEM;
542
543 rcu_read_lock();
544 map = rcu_dereference(queue->rps_map);
545 if (map)
546 for (i = 0; i < map->len; i++)
547 cpumask_set_cpu(map->cpus[i], mask);
548
549 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
550 if (PAGE_SIZE - len < 3) {
551 rcu_read_unlock();
552 free_cpumask_var(mask);
553 return -EINVAL;
554 }
555 rcu_read_unlock();
556
557 free_cpumask_var(mask);
558 len += sprintf(buf + len, "\n");
559 return len;
560}
561
562static ssize_t store_rps_map(struct netdev_rx_queue *queue,
563 struct rx_queue_attribute *attribute,
564 const char *buf, size_t len)
565{
566 struct rps_map *old_map, *map;
567 cpumask_var_t mask;
568 int err, cpu, i;
569 static DEFINE_SPINLOCK(rps_map_lock);
570
571 if (!capable(CAP_NET_ADMIN))
572 return -EPERM;
573
574 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
575 return -ENOMEM;
576
577 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
578 if (err) {
579 free_cpumask_var(mask);
580 return err;
581 }
582
583 map = kzalloc(max_t(unsigned,
584 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
585 GFP_KERNEL);
586 if (!map) {
587 free_cpumask_var(mask);
588 return -ENOMEM;
589 }
590
591 i = 0;
592 for_each_cpu_and(cpu, mask, cpu_online_mask)
593 map->cpus[i++] = cpu;
594
595 if (i)
596 map->len = i;
597 else {
598 kfree(map);
599 map = NULL;
600 }
601
602 spin_lock(&rps_map_lock);
603 old_map = rcu_dereference_protected(queue->rps_map,
604 lockdep_is_held(&rps_map_lock));
605 rcu_assign_pointer(queue->rps_map, map);
606 spin_unlock(&rps_map_lock);
607
608 if (old_map)
609 kfree_rcu(old_map, rcu);
610
611 free_cpumask_var(mask);
612 return len;
613}
614
615static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
616 struct rx_queue_attribute *attr,
617 char *buf)
618{
619 struct rps_dev_flow_table *flow_table;
620 unsigned int val = 0;
621
622 rcu_read_lock();
623 flow_table = rcu_dereference(queue->rps_flow_table);
624 if (flow_table)
625 val = flow_table->mask + 1;
626 rcu_read_unlock();
627
628 return sprintf(buf, "%u\n", val);
629}
630
631static void rps_dev_flow_table_release_work(struct work_struct *work)
632{
633 struct rps_dev_flow_table *table = container_of(work,
634 struct rps_dev_flow_table, free_work);
635
636 vfree(table);
637}
638
639static void rps_dev_flow_table_release(struct rcu_head *rcu)
640{
641 struct rps_dev_flow_table *table = container_of(rcu,
642 struct rps_dev_flow_table, rcu);
643
644 INIT_WORK(&table->free_work, rps_dev_flow_table_release_work);
645 schedule_work(&table->free_work);
646}
647
648static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
649 struct rx_queue_attribute *attr,
650 const char *buf, size_t len)
651{
652 unsigned int count;
653 char *endp;
654 struct rps_dev_flow_table *table, *old_table;
655 static DEFINE_SPINLOCK(rps_dev_flow_lock);
656
657 if (!capable(CAP_NET_ADMIN))
658 return -EPERM;
659
660 count = simple_strtoul(buf, &endp, 0);
661 if (endp == buf)
662 return -EINVAL;
663
664 if (count) {
665 int i;
666
667 if (count > 1<<30) {
668 /* Enforce a limit to prevent overflow */
669 return -EINVAL;
670 }
671 count = roundup_pow_of_two(count);
672 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count));
673 if (!table)
674 return -ENOMEM;
675
676 table->mask = count - 1;
677 for (i = 0; i < count; i++)
678 table->flows[i].cpu = RPS_NO_CPU;
679 } else
680 table = NULL;
681
682 spin_lock(&rps_dev_flow_lock);
683 old_table = rcu_dereference_protected(queue->rps_flow_table,
684 lockdep_is_held(&rps_dev_flow_lock));
685 rcu_assign_pointer(queue->rps_flow_table, table);
686 spin_unlock(&rps_dev_flow_lock);
687
688 if (old_table)
689 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
690
691 return len;
692}
693
694static struct rx_queue_attribute rps_cpus_attribute =
695 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
696
697
698static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
699 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
700 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
701
702static struct attribute *rx_queue_default_attrs[] = {
703 &rps_cpus_attribute.attr,
704 &rps_dev_flow_table_cnt_attribute.attr,
705 NULL
706};
707
708static void rx_queue_release(struct kobject *kobj)
709{
710 struct netdev_rx_queue *queue = to_rx_queue(kobj);
711 struct rps_map *map;
712 struct rps_dev_flow_table *flow_table;
713
714
715 map = rcu_dereference_raw(queue->rps_map);
716 if (map) {
717 RCU_INIT_POINTER(queue->rps_map, NULL);
718 kfree_rcu(map, rcu);
719 }
720
721 flow_table = rcu_dereference_raw(queue->rps_flow_table);
722 if (flow_table) {
723 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
724 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
725 }
726
727 memset(kobj, 0, sizeof(*kobj));
728 dev_put(queue->dev);
729}
730
731static struct kobj_type rx_queue_ktype = {
732 .sysfs_ops = &rx_queue_sysfs_ops,
733 .release = rx_queue_release,
734 .default_attrs = rx_queue_default_attrs,
735};
736
737static int rx_queue_add_kobject(struct net_device *net, int index)
738{
739 struct netdev_rx_queue *queue = net->_rx + index;
740 struct kobject *kobj = &queue->kobj;
741 int error = 0;
742
743 kobj->kset = net->queues_kset;
744 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
745 "rx-%u", index);
746 if (error) {
747 kobject_put(kobj);
748 return error;
749 }
750
751 kobject_uevent(kobj, KOBJ_ADD);
752 dev_hold(queue->dev);
753
754 return error;
755}
756#endif /* CONFIG_RPS */
757
758int
759net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
760{
761#ifdef CONFIG_RPS
762 int i;
763 int error = 0;
764
765 for (i = old_num; i < new_num; i++) {
766 error = rx_queue_add_kobject(net, i);
767 if (error) {
768 new_num = old_num;
769 break;
770 }
771 }
772
773 while (--i >= new_num)
774 kobject_put(&net->_rx[i].kobj);
775
776 return error;
777#else
778 return 0;
779#endif
780}
781
782#ifdef CONFIG_XPS
783/*
784 * netdev_queue sysfs structures and functions.
785 */
786struct netdev_queue_attribute {
787 struct attribute attr;
788 ssize_t (*show)(struct netdev_queue *queue,
789 struct netdev_queue_attribute *attr, char *buf);
790 ssize_t (*store)(struct netdev_queue *queue,
791 struct netdev_queue_attribute *attr, const char *buf, size_t len);
792};
793#define to_netdev_queue_attr(_attr) container_of(_attr, \
794 struct netdev_queue_attribute, attr)
795
796#define to_netdev_queue(obj) container_of(obj, struct netdev_queue, kobj)
797
798static ssize_t netdev_queue_attr_show(struct kobject *kobj,
799 struct attribute *attr, char *buf)
800{
801 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
802 struct netdev_queue *queue = to_netdev_queue(kobj);
803
804 if (!attribute->show)
805 return -EIO;
806
807 return attribute->show(queue, attribute, buf);
808}
809
810static ssize_t netdev_queue_attr_store(struct kobject *kobj,
811 struct attribute *attr,
812 const char *buf, size_t count)
813{
814 struct netdev_queue_attribute *attribute = to_netdev_queue_attr(attr);
815 struct netdev_queue *queue = to_netdev_queue(kobj);
816
817 if (!attribute->store)
818 return -EIO;
819
820 return attribute->store(queue, attribute, buf, count);
821}
822
823static const struct sysfs_ops netdev_queue_sysfs_ops = {
824 .show = netdev_queue_attr_show,
825 .store = netdev_queue_attr_store,
826};
827
828static inline unsigned int get_netdev_queue_index(struct netdev_queue *queue)
829{
830 struct net_device *dev = queue->dev;
831 int i;
832
833 for (i = 0; i < dev->num_tx_queues; i++)
834 if (queue == &dev->_tx[i])
835 break;
836
837 BUG_ON(i >= dev->num_tx_queues);
838
839 return i;
840}
841
842
843static ssize_t show_xps_map(struct netdev_queue *queue,
844 struct netdev_queue_attribute *attribute, char *buf)
845{
846 struct net_device *dev = queue->dev;
847 struct xps_dev_maps *dev_maps;
848 cpumask_var_t mask;
849 unsigned long index;
850 size_t len = 0;
851 int i;
852
853 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
854 return -ENOMEM;
855
856 index = get_netdev_queue_index(queue);
857
858 rcu_read_lock();
859 dev_maps = rcu_dereference(dev->xps_maps);
860 if (dev_maps) {
861 for_each_possible_cpu(i) {
862 struct xps_map *map =
863 rcu_dereference(dev_maps->cpu_map[i]);
864 if (map) {
865 int j;
866 for (j = 0; j < map->len; j++) {
867 if (map->queues[j] == index) {
868 cpumask_set_cpu(i, mask);
869 break;
870 }
871 }
872 }
873 }
874 }
875 rcu_read_unlock();
876
877 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
878 if (PAGE_SIZE - len < 3) {
879 free_cpumask_var(mask);
880 return -EINVAL;
881 }
882
883 free_cpumask_var(mask);
884 len += sprintf(buf + len, "\n");
885 return len;
886}
887
888static DEFINE_MUTEX(xps_map_mutex);
889#define xmap_dereference(P) \
890 rcu_dereference_protected((P), lockdep_is_held(&xps_map_mutex))
891
892static ssize_t store_xps_map(struct netdev_queue *queue,
893 struct netdev_queue_attribute *attribute,
894 const char *buf, size_t len)
895{
896 struct net_device *dev = queue->dev;
897 cpumask_var_t mask;
898 int err, i, cpu, pos, map_len, alloc_len, need_set;
899 unsigned long index;
900 struct xps_map *map, *new_map;
901 struct xps_dev_maps *dev_maps, *new_dev_maps;
902 int nonempty = 0;
903 int numa_node = -2;
904
905 if (!capable(CAP_NET_ADMIN))
906 return -EPERM;
907
908 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
909 return -ENOMEM;
910
911 index = get_netdev_queue_index(queue);
912
913 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
914 if (err) {
915 free_cpumask_var(mask);
916 return err;
917 }
918
919 new_dev_maps = kzalloc(max_t(unsigned,
920 XPS_DEV_MAPS_SIZE, L1_CACHE_BYTES), GFP_KERNEL);
921 if (!new_dev_maps) {
922 free_cpumask_var(mask);
923 return -ENOMEM;
924 }
925
926 mutex_lock(&xps_map_mutex);
927
928 dev_maps = xmap_dereference(dev->xps_maps);
929
930 for_each_possible_cpu(cpu) {
931 map = dev_maps ?
932 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
933 new_map = map;
934 if (map) {
935 for (pos = 0; pos < map->len; pos++)
936 if (map->queues[pos] == index)
937 break;
938 map_len = map->len;
939 alloc_len = map->alloc_len;
940 } else
941 pos = map_len = alloc_len = 0;
942
943 need_set = cpumask_test_cpu(cpu, mask) && cpu_online(cpu);
944#ifdef CONFIG_NUMA
945 if (need_set) {
946 if (numa_node == -2)
947 numa_node = cpu_to_node(cpu);
948 else if (numa_node != cpu_to_node(cpu))
949 numa_node = -1;
950 }
951#endif
952 if (need_set && pos >= map_len) {
953 /* Need to add queue to this CPU's map */
954 if (map_len >= alloc_len) {
955 alloc_len = alloc_len ?
956 2 * alloc_len : XPS_MIN_MAP_ALLOC;
957 new_map = kzalloc_node(XPS_MAP_SIZE(alloc_len),
958 GFP_KERNEL,
959 cpu_to_node(cpu));
960 if (!new_map)
961 goto error;
962 new_map->alloc_len = alloc_len;
963 for (i = 0; i < map_len; i++)
964 new_map->queues[i] = map->queues[i];
965 new_map->len = map_len;
966 }
967 new_map->queues[new_map->len++] = index;
968 } else if (!need_set && pos < map_len) {
969 /* Need to remove queue from this CPU's map */
970 if (map_len > 1)
971 new_map->queues[pos] =
972 new_map->queues[--new_map->len];
973 else
974 new_map = NULL;
975 }
976 RCU_INIT_POINTER(new_dev_maps->cpu_map[cpu], new_map);
977 }
978
979 /* Cleanup old maps */
980 for_each_possible_cpu(cpu) {
981 map = dev_maps ?
982 xmap_dereference(dev_maps->cpu_map[cpu]) : NULL;
983 if (map && xmap_dereference(new_dev_maps->cpu_map[cpu]) != map)
984 kfree_rcu(map, rcu);
985 if (new_dev_maps->cpu_map[cpu])
986 nonempty = 1;
987 }
988
989 if (nonempty)
990 rcu_assign_pointer(dev->xps_maps, new_dev_maps);
991 else {
992 kfree(new_dev_maps);
993 rcu_assign_pointer(dev->xps_maps, NULL);
994 }
995
996 if (dev_maps)
997 kfree_rcu(dev_maps, rcu);
998
999 netdev_queue_numa_node_write(queue, (numa_node >= 0) ? numa_node :
1000 NUMA_NO_NODE);
1001
1002 mutex_unlock(&xps_map_mutex);
1003
1004 free_cpumask_var(mask);
1005 return len;
1006
1007error:
1008 mutex_unlock(&xps_map_mutex);
1009
1010 if (new_dev_maps)
1011 for_each_possible_cpu(i)
1012 kfree(rcu_dereference_protected(
1013 new_dev_maps->cpu_map[i],
1014 1));
1015 kfree(new_dev_maps);
1016 free_cpumask_var(mask);
1017 return -ENOMEM;
1018}
1019
1020static struct netdev_queue_attribute xps_cpus_attribute =
1021 __ATTR(xps_cpus, S_IRUGO | S_IWUSR, show_xps_map, store_xps_map);
1022
1023static struct attribute *netdev_queue_default_attrs[] = {
1024 &xps_cpus_attribute.attr,
1025 NULL
1026};
1027
1028static void netdev_queue_release(struct kobject *kobj)
1029{
1030 struct netdev_queue *queue = to_netdev_queue(kobj);
1031 struct net_device *dev = queue->dev;
1032 struct xps_dev_maps *dev_maps;
1033 struct xps_map *map;
1034 unsigned long index;
1035 int i, pos, nonempty = 0;
1036
1037 index = get_netdev_queue_index(queue);
1038
1039 mutex_lock(&xps_map_mutex);
1040 dev_maps = xmap_dereference(dev->xps_maps);
1041
1042 if (dev_maps) {
1043 for_each_possible_cpu(i) {
1044 map = xmap_dereference(dev_maps->cpu_map[i]);
1045 if (!map)
1046 continue;
1047
1048 for (pos = 0; pos < map->len; pos++)
1049 if (map->queues[pos] == index)
1050 break;
1051
1052 if (pos < map->len) {
1053 if (map->len > 1)
1054 map->queues[pos] =
1055 map->queues[--map->len];
1056 else {
1057 RCU_INIT_POINTER(dev_maps->cpu_map[i],
1058 NULL);
1059 kfree_rcu(map, rcu);
1060 map = NULL;
1061 }
1062 }
1063 if (map)
1064 nonempty = 1;
1065 }
1066
1067 if (!nonempty) {
1068 RCU_INIT_POINTER(dev->xps_maps, NULL);
1069 kfree_rcu(dev_maps, rcu);
1070 }
1071 }
1072
1073 mutex_unlock(&xps_map_mutex);
1074
1075 memset(kobj, 0, sizeof(*kobj));
1076 dev_put(queue->dev);
1077}
1078
1079static struct kobj_type netdev_queue_ktype = {
1080 .sysfs_ops = &netdev_queue_sysfs_ops,
1081 .release = netdev_queue_release,
1082 .default_attrs = netdev_queue_default_attrs,
1083};
1084
1085static int netdev_queue_add_kobject(struct net_device *net, int index)
1086{
1087 struct netdev_queue *queue = net->_tx + index;
1088 struct kobject *kobj = &queue->kobj;
1089 int error = 0;
1090
1091 kobj->kset = net->queues_kset;
1092 error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL,
1093 "tx-%u", index);
1094 if (error) {
1095 kobject_put(kobj);
1096 return error;
1097 }
1098
1099 kobject_uevent(kobj, KOBJ_ADD);
1100 dev_hold(queue->dev);
1101
1102 return error;
1103}
1104#endif /* CONFIG_XPS */
1105
1106int
1107netdev_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
1108{
1109#ifdef CONFIG_XPS
1110 int i;
1111 int error = 0;
1112
1113 for (i = old_num; i < new_num; i++) {
1114 error = netdev_queue_add_kobject(net, i);
1115 if (error) {
1116 new_num = old_num;
1117 break;
1118 }
1119 }
1120
1121 while (--i >= new_num)
1122 kobject_put(&net->_tx[i].kobj);
1123
1124 return error;
1125#else
1126 return 0;
1127#endif
1128}
1129
1130static int register_queue_kobjects(struct net_device *net)
1131{
1132 int error = 0, txq = 0, rxq = 0, real_rx = 0, real_tx = 0;
1133
1134#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
1135 net->queues_kset = kset_create_and_add("queues",
1136 NULL, &net->dev.kobj);
1137 if (!net->queues_kset)
1138 return -ENOMEM;
1139#endif
1140
1141#ifdef CONFIG_RPS
1142 real_rx = net->real_num_rx_queues;
1143#endif
1144 real_tx = net->real_num_tx_queues;
1145
1146 error = net_rx_queue_update_kobjects(net, 0, real_rx);
1147 if (error)
1148 goto error;
1149 rxq = real_rx;
1150
1151 error = netdev_queue_update_kobjects(net, 0, real_tx);
1152 if (error)
1153 goto error;
1154 txq = real_tx;
1155
1156 return 0;
1157
1158error:
1159 netdev_queue_update_kobjects(net, txq, 0);
1160 net_rx_queue_update_kobjects(net, rxq, 0);
1161 return error;
1162}
1163
1164static void remove_queue_kobjects(struct net_device *net)
1165{
1166 int real_rx = 0, real_tx = 0;
1167
1168#ifdef CONFIG_RPS
1169 real_rx = net->real_num_rx_queues;
1170#endif
1171 real_tx = net->real_num_tx_queues;
1172
1173 net_rx_queue_update_kobjects(net, real_rx, 0);
1174 netdev_queue_update_kobjects(net, real_tx, 0);
1175#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
1176 kset_unregister(net->queues_kset);
1177#endif
1178}
1179
1180static void *net_grab_current_ns(void)
1181{
1182 struct net *ns = current->nsproxy->net_ns;
1183#ifdef CONFIG_NET_NS
1184 if (ns)
1185 atomic_inc(&ns->passive);
1186#endif
1187 return ns;
1188}
1189
1190static const void *net_initial_ns(void)
1191{
1192 return &init_net;
1193}
1194
1195static const void *net_netlink_ns(struct sock *sk)
1196{
1197 return sock_net(sk);
1198}
1199
1200struct kobj_ns_type_operations net_ns_type_operations = {
1201 .type = KOBJ_NS_TYPE_NET,
1202 .grab_current_ns = net_grab_current_ns,
1203 .netlink_ns = net_netlink_ns,
1204 .initial_ns = net_initial_ns,
1205 .drop_ns = net_drop_ns,
1206};
1207EXPORT_SYMBOL_GPL(net_ns_type_operations);
1208
1209#ifdef CONFIG_HOTPLUG
1210static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
1211{
1212 struct net_device *dev = to_net_dev(d);
1213 int retval;
1214
1215 /* pass interface to uevent. */
1216 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
1217 if (retval)
1218 goto exit;
1219
1220 /* pass ifindex to uevent.
1221 * ifindex is useful as it won't change (interface name may change)
1222 * and is what RtNetlink uses natively. */
1223 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1224
1225exit:
1226 return retval;
1227}
1228#endif
1229
1230/*
1231 * netdev_release -- destroy and free a dead device.
1232 * Called when last reference to device kobject is gone.
1233 */
1234static void netdev_release(struct device *d)
1235{
1236 struct net_device *dev = to_net_dev(d);
1237
1238 BUG_ON(dev->reg_state != NETREG_RELEASED);
1239
1240 kfree(dev->ifalias);
1241 kfree((char *)dev - dev->padded);
1242}
1243
1244static const void *net_namespace(struct device *d)
1245{
1246 struct net_device *dev;
1247 dev = container_of(d, struct net_device, dev);
1248 return dev_net(dev);
1249}
1250
1251static struct class net_class = {
1252 .name = "net",
1253 .dev_release = netdev_release,
1254#ifdef CONFIG_SYSFS
1255 .dev_attrs = net_class_attributes,
1256#endif /* CONFIG_SYSFS */
1257#ifdef CONFIG_HOTPLUG
1258 .dev_uevent = netdev_uevent,
1259#endif
1260 .ns_type = &net_ns_type_operations,
1261 .namespace = net_namespace,
1262};
1263
1264/* Delete sysfs entries but hold kobject reference until after all
1265 * netdev references are gone.
1266 */
1267void netdev_unregister_kobject(struct net_device * net)
1268{
1269 struct device *dev = &(net->dev);
1270
1271 kobject_get(&dev->kobj);
1272
1273 remove_queue_kobjects(net);
1274
1275 device_del(dev);
1276}
1277
1278/* Create sysfs entries for network device. */
1279int netdev_register_kobject(struct net_device *net)
1280{
1281 struct device *dev = &(net->dev);
1282 const struct attribute_group **groups = net->sysfs_groups;
1283 int error = 0;
1284
1285 device_initialize(dev);
1286 dev->class = &net_class;
1287 dev->platform_data = net;
1288 dev->groups = groups;
1289
1290 dev_set_name(dev, "%s", net->name);
1291
1292#ifdef CONFIG_SYSFS
1293 /* Allow for a device specific group */
1294 if (*groups)
1295 groups++;
1296
1297 *groups++ = &netstat_group;
1298#ifdef CONFIG_WIRELESS_EXT_SYSFS
1299 if (net->ieee80211_ptr)
1300 *groups++ = &wireless_group;
1301#ifdef CONFIG_WIRELESS_EXT
1302 else if (net->wireless_handlers)
1303 *groups++ = &wireless_group;
1304#endif
1305#endif
1306#endif /* CONFIG_SYSFS */
1307
1308 error = device_add(dev);
1309 if (error)
1310 return error;
1311
1312 error = register_queue_kobjects(net);
1313 if (error) {
1314 device_del(dev);
1315 return error;
1316 }
1317
1318 return error;
1319}
1320
1321int netdev_class_create_file(struct class_attribute *class_attr)
1322{
1323 return class_create_file(&net_class, class_attr);
1324}
1325EXPORT_SYMBOL(netdev_class_create_file);
1326
1327void netdev_class_remove_file(struct class_attribute *class_attr)
1328{
1329 class_remove_file(&net_class, class_attr);
1330}
1331EXPORT_SYMBOL(netdev_class_remove_file);
1332
1333int netdev_kobject_init(void)
1334{
1335 kobj_ns_type_register(&net_ns_type_operations);
1336 return class_register(&net_class);
1337}
1/*
2 * net-sysfs.c - network device class and attributes
3 *
4 * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
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/* use same locking rules as GIF* ioctl's */
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/* generate a show function for simple field */
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/* use same locking and permission rules as SIF* ioctl's */
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/* use same locking rules as GIFHWADDR ioctl's */
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", /* currently unused */
261 "down",
262 "lowerlayerdown",
263 "testing", /* currently unused */
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; /* should not happen */
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/* read-write attributes */
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 /* ignore trailing newline */
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/* Show a given an attribute in the statistics group */
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/* generate a read-only statistics attribute */
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 /* CONFIG_SYSFS */
641#define net_class_groups NULL
642#endif /* CONFIG_SYSFS */
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 /* mask = roundup_pow_of_two(count) - 1;
804 * without overflows...
805 */
806 while ((mask | (mask >> 1)) != mask)
807 mask |= (mask >> 1);
808 /* On 64 bit arches, must check mask fits in table->mask (u32),
809 * and on 32bit arches, must check
810 * RPS_DEV_FLOW_TABLE_SIZE(mask + 1) doesn't overflow.
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 /* Enforce a limit to prevent overflow */
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 /* CONFIG_RPS */
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 /* CONFIG_SYSFS */
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 (!atomic_read(&dev_net(dev)->count))
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 * netdev_queue sysfs structures and functions.
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 * Byte queue limits sysfs structures and functions.
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 /* CONFIG_BQL */
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 /* CONFIG_XPS */
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 /* CONFIG_SYSFS */
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 (!atomic_read(&dev_net(dev)->count))
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 /* CONFIG_SYSFS */
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 /* pass interface to uevent. */
1477 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
1478 if (retval)
1479 goto exit;
1480
1481 /* pass ifindex to uevent.
1482 * ifindex is useful as it won't change (interface name may change)
1483 * and is what RtNetlink uses natively. */
1484 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
1485
1486exit:
1487 return retval;
1488}
1489
1490/*
1491 * netdev_release -- destroy and free a dead device.
1492 * Called when last reference to device kobject is gone.
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 * of_find_net_device_by_node - lookup the net device for the device node
1533 * @np: OF device node
1534 *
1535 * Looks up the net_device structure corresponding with the device node.
1536 * If successful, returns a pointer to the net_device with the embedded
1537 * struct device refcount incremented by one, or NULL on failure. The
1538 * refcount must be dropped when done with the net_device.
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/* Delete sysfs entries but hold kobject reference until after all
1554 * netdev references are gone.
1555 */
1556void netdev_unregister_kobject(struct net_device *ndev)
1557{
1558 struct device *dev = &(ndev->dev);
1559
1560 if (!atomic_read(&dev_net(ndev)->count))
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/* Create sysfs entries for network device. */
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 /* Allow for a device specific group */
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 /* CONFIG_SYSFS */
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}