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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_ulong[] = "%lu\n";
32static const char fmt_u64[] = "%llu\n";
33
34static inline int dev_isalive(const struct net_device *dev)
35{
36 return dev->reg_state <= NETREG_REGISTERED;
37}
38
39
40static ssize_t netdev_show(const struct device *dev,
41 struct device_attribute *attr, char *buf,
42 ssize_t (*format)(const struct net_device *, char *))
43{
44 struct net_device *net = to_net_dev(dev);
45 ssize_t ret = -EINVAL;
46
47 read_lock(&dev_base_lock);
48 if (dev_isalive(net))
49 ret = (*format)(net, buf);
50 read_unlock(&dev_base_lock);
51
52 return ret;
53}
54
55
56#define NETDEVICE_SHOW(field, format_string) \
57static ssize_t format_##field(const struct net_device *net, char *buf) \
58{ \
59 return sprintf(buf, format_string, net->field); \
60} \
61static ssize_t show_##field(struct device *dev, \
62 struct device_attribute *attr, char *buf) \
63{ \
64 return netdev_show(dev, attr, buf, format_##field); \
65}
66
67
68
69static ssize_t netdev_store(struct device *dev, struct device_attribute *attr,
70 const char *buf, size_t len,
71 int (*set)(struct net_device *, unsigned long))
72{
73 struct net_device *net = to_net_dev(dev);
74 char *endp;
75 unsigned long new;
76 int ret = -EINVAL;
77
78 if (!capable(CAP_NET_ADMIN))
79 return -EPERM;
80
81 new = simple_strtoul(buf, &endp, 0);
82 if (endp == buf)
83 goto err;
84
85 if (!rtnl_trylock())
86 return restart_syscall();
87
88 if (dev_isalive(net)) {
89 if ((ret = (*set)(net, new)) == 0)
90 ret = len;
91 }
92 rtnl_unlock();
93 err:
94 return ret;
95}
96
97NETDEVICE_SHOW(dev_id, fmt_hex);
98NETDEVICE_SHOW(addr_assign_type, fmt_dec);
99NETDEVICE_SHOW(addr_len, fmt_dec);
100NETDEVICE_SHOW(iflink, fmt_dec);
101NETDEVICE_SHOW(ifindex, fmt_dec);
102NETDEVICE_SHOW(features, fmt_long_hex);
103NETDEVICE_SHOW(type, fmt_dec);
104NETDEVICE_SHOW(link_mode, fmt_dec);
105
106
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 netdev->ethtool_ops &&
150 netdev->ethtool_ops->get_settings) {
151 struct ethtool_cmd cmd = { ETHTOOL_GSET };
152
153 if (!netdev->ethtool_ops->get_settings(netdev, &cmd))
154 ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd));
155 }
156 rtnl_unlock();
157 return ret;
158}
159
160static ssize_t show_duplex(struct device *dev,
161 struct device_attribute *attr, char *buf)
162{
163 struct net_device *netdev = to_net_dev(dev);
164 int ret = -EINVAL;
165
166 if (!rtnl_trylock())
167 return restart_syscall();
168
169 if (netif_running(netdev) &&
170 netdev->ethtool_ops &&
171 netdev->ethtool_ops->get_settings) {
172 struct ethtool_cmd cmd = { ETHTOOL_GSET };
173
174 if (!netdev->ethtool_ops->get_settings(netdev, &cmd))
175 ret = sprintf(buf, "%s\n", cmd.duplex ? "full" : "half");
176 }
177 rtnl_unlock();
178 return ret;
179}
180
181static ssize_t show_dormant(struct device *dev,
182 struct device_attribute *attr, char *buf)
183{
184 struct net_device *netdev = to_net_dev(dev);
185
186 if (netif_running(netdev))
187 return sprintf(buf, fmt_dec, !!netif_dormant(netdev));
188
189 return -EINVAL;
190}
191
192static const char *const operstates[] = {
193 "unknown",
194 "notpresent",
195 "down",
196 "lowerlayerdown",
197 "testing",
198 "dormant",
199 "up"
200};
201
202static ssize_t show_operstate(struct device *dev,
203 struct device_attribute *attr, char *buf)
204{
205 const struct net_device *netdev = to_net_dev(dev);
206 unsigned char operstate;
207
208 read_lock(&dev_base_lock);
209 operstate = netdev->operstate;
210 if (!netif_running(netdev))
211 operstate = IF_OPER_DOWN;
212 read_unlock(&dev_base_lock);
213
214 if (operstate >= ARRAY_SIZE(operstates))
215 return -EINVAL;
216
217 return sprintf(buf, "%s\n", operstates[operstate]);
218}
219
220
221NETDEVICE_SHOW(mtu, fmt_dec);
222
223static int change_mtu(struct net_device *net, unsigned long new_mtu)
224{
225 return dev_set_mtu(net, (int) new_mtu);
226}
227
228static ssize_t store_mtu(struct device *dev, struct device_attribute *attr,
229 const char *buf, size_t len)
230{
231 return netdev_store(dev, attr, buf, len, change_mtu);
232}
233
234NETDEVICE_SHOW(flags, fmt_hex);
235
236static int change_flags(struct net_device *net, unsigned long new_flags)
237{
238 return dev_change_flags(net, (unsigned) new_flags);
239}
240
241static ssize_t store_flags(struct device *dev, struct device_attribute *attr,
242 const char *buf, size_t len)
243{
244 return netdev_store(dev, attr, buf, len, change_flags);
245}
246
247NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
248
249static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
250{
251 net->tx_queue_len = new_len;
252 return 0;
253}
254
255static ssize_t store_tx_queue_len(struct device *dev,
256 struct device_attribute *attr,
257 const char *buf, size_t len)
258{
259 return netdev_store(dev, attr, buf, len, change_tx_queue_len);
260}
261
262static ssize_t store_ifalias(struct device *dev, struct device_attribute *attr,
263 const char *buf, size_t len)
264{
265 struct net_device *netdev = to_net_dev(dev);
266 size_t count = len;
267 ssize_t ret;
268
269 if (!capable(CAP_NET_ADMIN))
270 return -EPERM;
271
272
273 if (len > 0 && buf[len - 1] == '\n')
274 --count;
275
276 if (!rtnl_trylock())
277 return restart_syscall();
278 ret = dev_set_alias(netdev, buf, count);
279 rtnl_unlock();
280
281 return ret < 0 ? ret : len;
282}
283
284static ssize_t show_ifalias(struct device *dev,
285 struct device_attribute *attr, char *buf)
286{
287 const struct net_device *netdev = to_net_dev(dev);
288 ssize_t ret = 0;
289
290 if (!rtnl_trylock())
291 return restart_syscall();
292 if (netdev->ifalias)
293 ret = sprintf(buf, "%s\n", netdev->ifalias);
294 rtnl_unlock();
295 return ret;
296}
297
298static struct device_attribute net_class_attributes[] = {
299 __ATTR(addr_assign_type, S_IRUGO, show_addr_assign_type, NULL),
300 __ATTR(addr_len, S_IRUGO, show_addr_len, NULL),
301 __ATTR(dev_id, S_IRUGO, show_dev_id, NULL),
302 __ATTR(ifalias, S_IRUGO | S_IWUSR, show_ifalias, store_ifalias),
303 __ATTR(iflink, S_IRUGO, show_iflink, NULL),
304 __ATTR(ifindex, S_IRUGO, show_ifindex, NULL),
305 __ATTR(features, S_IRUGO, show_features, NULL),
306 __ATTR(type, S_IRUGO, show_type, NULL),
307 __ATTR(link_mode, S_IRUGO, show_link_mode, NULL),
308 __ATTR(address, S_IRUGO, show_address, NULL),
309 __ATTR(broadcast, S_IRUGO, show_broadcast, NULL),
310 __ATTR(carrier, S_IRUGO, show_carrier, NULL),
311 __ATTR(speed, S_IRUGO, show_speed, NULL),
312 __ATTR(duplex, S_IRUGO, show_duplex, NULL),
313 __ATTR(dormant, S_IRUGO, show_dormant, NULL),
314 __ATTR(operstate, S_IRUGO, show_operstate, NULL),
315 __ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu),
316 __ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags),
317 __ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
318 store_tx_queue_len),
319 {}
320};
321
322
323static ssize_t netstat_show(const struct device *d,
324 struct device_attribute *attr, char *buf,
325 unsigned long offset)
326{
327 struct net_device *dev = to_net_dev(d);
328 ssize_t ret = -EINVAL;
329
330 WARN_ON(offset > sizeof(struct rtnl_link_stats64) ||
331 offset % sizeof(u64) != 0);
332
333 read_lock(&dev_base_lock);
334 if (dev_isalive(dev)) {
335 struct rtnl_link_stats64 temp;
336 const struct rtnl_link_stats64 *stats = dev_get_stats(dev, &temp);
337
338 ret = sprintf(buf, fmt_u64, *(u64 *)(((u8 *) stats) + offset));
339 }
340 read_unlock(&dev_base_lock);
341 return ret;
342}
343
344
345#define NETSTAT_ENTRY(name) \
346static ssize_t show_##name(struct device *d, \
347 struct device_attribute *attr, char *buf) \
348{ \
349 return netstat_show(d, attr, buf, \
350 offsetof(struct rtnl_link_stats64, name)); \
351} \
352static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
353
354NETSTAT_ENTRY(rx_packets);
355NETSTAT_ENTRY(tx_packets);
356NETSTAT_ENTRY(rx_bytes);
357NETSTAT_ENTRY(tx_bytes);
358NETSTAT_ENTRY(rx_errors);
359NETSTAT_ENTRY(tx_errors);
360NETSTAT_ENTRY(rx_dropped);
361NETSTAT_ENTRY(tx_dropped);
362NETSTAT_ENTRY(multicast);
363NETSTAT_ENTRY(collisions);
364NETSTAT_ENTRY(rx_length_errors);
365NETSTAT_ENTRY(rx_over_errors);
366NETSTAT_ENTRY(rx_crc_errors);
367NETSTAT_ENTRY(rx_frame_errors);
368NETSTAT_ENTRY(rx_fifo_errors);
369NETSTAT_ENTRY(rx_missed_errors);
370NETSTAT_ENTRY(tx_aborted_errors);
371NETSTAT_ENTRY(tx_carrier_errors);
372NETSTAT_ENTRY(tx_fifo_errors);
373NETSTAT_ENTRY(tx_heartbeat_errors);
374NETSTAT_ENTRY(tx_window_errors);
375NETSTAT_ENTRY(rx_compressed);
376NETSTAT_ENTRY(tx_compressed);
377
378static struct attribute *netstat_attrs[] = {
379 &dev_attr_rx_packets.attr,
380 &dev_attr_tx_packets.attr,
381 &dev_attr_rx_bytes.attr,
382 &dev_attr_tx_bytes.attr,
383 &dev_attr_rx_errors.attr,
384 &dev_attr_tx_errors.attr,
385 &dev_attr_rx_dropped.attr,
386 &dev_attr_tx_dropped.attr,
387 &dev_attr_multicast.attr,
388 &dev_attr_collisions.attr,
389 &dev_attr_rx_length_errors.attr,
390 &dev_attr_rx_over_errors.attr,
391 &dev_attr_rx_crc_errors.attr,
392 &dev_attr_rx_frame_errors.attr,
393 &dev_attr_rx_fifo_errors.attr,
394 &dev_attr_rx_missed_errors.attr,
395 &dev_attr_tx_aborted_errors.attr,
396 &dev_attr_tx_carrier_errors.attr,
397 &dev_attr_tx_fifo_errors.attr,
398 &dev_attr_tx_heartbeat_errors.attr,
399 &dev_attr_tx_window_errors.attr,
400 &dev_attr_rx_compressed.attr,
401 &dev_attr_tx_compressed.attr,
402 NULL
403};
404
405
406static struct attribute_group netstat_group = {
407 .name = "statistics",
408 .attrs = netstat_attrs,
409};
410
411#ifdef CONFIG_WIRELESS_EXT_SYSFS
412
413static ssize_t wireless_show(struct device *d, char *buf,
414 ssize_t (*format)(const struct iw_statistics *,
415 char *))
416{
417 struct net_device *dev = to_net_dev(d);
418 const struct iw_statistics *iw;
419 ssize_t ret = -EINVAL;
420
421 if (!rtnl_trylock())
422 return restart_syscall();
423 if (dev_isalive(dev)) {
424 iw = get_wireless_stats(dev);
425 if (iw)
426 ret = (*format)(iw, buf);
427 }
428 rtnl_unlock();
429
430 return ret;
431}
432
433
434#define WIRELESS_SHOW(name, field, format_string) \
435static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
436{ \
437 return sprintf(buf, format_string, iw->field); \
438} \
439static ssize_t show_iw_##name(struct device *d, \
440 struct device_attribute *attr, char *buf) \
441{ \
442 return wireless_show(d, buf, format_iw_##name); \
443} \
444static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
445
446WIRELESS_SHOW(status, status, fmt_hex);
447WIRELESS_SHOW(link, qual.qual, fmt_dec);
448WIRELESS_SHOW(level, qual.level, fmt_dec);
449WIRELESS_SHOW(noise, qual.noise, fmt_dec);
450WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
451WIRELESS_SHOW(crypt, discard.code, fmt_dec);
452WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
453WIRELESS_SHOW(misc, discard.misc, fmt_dec);
454WIRELESS_SHOW(retries, discard.retries, fmt_dec);
455WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
456
457static struct attribute *wireless_attrs[] = {
458 &dev_attr_status.attr,
459 &dev_attr_link.attr,
460 &dev_attr_level.attr,
461 &dev_attr_noise.attr,
462 &dev_attr_nwid.attr,
463 &dev_attr_crypt.attr,
464 &dev_attr_fragment.attr,
465 &dev_attr_retries.attr,
466 &dev_attr_misc.attr,
467 &dev_attr_beacon.attr,
468 NULL
469};
470
471static struct attribute_group wireless_group = {
472 .name = "wireless",
473 .attrs = wireless_attrs,
474};
475#endif
476#endif
477
478#ifdef CONFIG_RPS
479
480
481
482struct rx_queue_attribute {
483 struct attribute attr;
484 ssize_t (*show)(struct netdev_rx_queue *queue,
485 struct rx_queue_attribute *attr, char *buf);
486 ssize_t (*store)(struct netdev_rx_queue *queue,
487 struct rx_queue_attribute *attr, const char *buf, size_t len);
488};
489#define to_rx_queue_attr(_attr) container_of(_attr, \
490 struct rx_queue_attribute, attr)
491
492#define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
493
494static ssize_t rx_queue_attr_show(struct kobject *kobj, struct attribute *attr,
495 char *buf)
496{
497 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
498 struct netdev_rx_queue *queue = to_rx_queue(kobj);
499
500 if (!attribute->show)
501 return -EIO;
502
503 return attribute->show(queue, attribute, buf);
504}
505
506static ssize_t rx_queue_attr_store(struct kobject *kobj, struct attribute *attr,
507 const char *buf, size_t count)
508{
509 struct rx_queue_attribute *attribute = to_rx_queue_attr(attr);
510 struct netdev_rx_queue *queue = to_rx_queue(kobj);
511
512 if (!attribute->store)
513 return -EIO;
514
515 return attribute->store(queue, attribute, buf, count);
516}
517
518static const struct sysfs_ops rx_queue_sysfs_ops = {
519 .show = rx_queue_attr_show,
520 .store = rx_queue_attr_store,
521};
522
523static ssize_t show_rps_map(struct netdev_rx_queue *queue,
524 struct rx_queue_attribute *attribute, char *buf)
525{
526 struct rps_map *map;
527 cpumask_var_t mask;
528 size_t len = 0;
529 int i;
530
531 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
532 return -ENOMEM;
533
534 rcu_read_lock();
535 map = rcu_dereference(queue->rps_map);
536 if (map)
537 for (i = 0; i < map->len; i++)
538 cpumask_set_cpu(map->cpus[i], mask);
539
540 len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
541 if (PAGE_SIZE - len < 3) {
542 rcu_read_unlock();
543 free_cpumask_var(mask);
544 return -EINVAL;
545 }
546 rcu_read_unlock();
547
548 free_cpumask_var(mask);
549 len += sprintf(buf + len, "\n");
550 return len;
551}
552
553static void rps_map_release(struct rcu_head *rcu)
554{
555 struct rps_map *map = container_of(rcu, struct rps_map, rcu);
556
557 kfree(map);
558}
559
560static ssize_t store_rps_map(struct netdev_rx_queue *queue,
561 struct rx_queue_attribute *attribute,
562 const char *buf, size_t len)
563{
564 struct rps_map *old_map, *map;
565 cpumask_var_t mask;
566 int err, cpu, i;
567 static DEFINE_SPINLOCK(rps_map_lock);
568
569 if (!capable(CAP_NET_ADMIN))
570 return -EPERM;
571
572 if (!alloc_cpumask_var(&mask, GFP_KERNEL))
573 return -ENOMEM;
574
575 err = bitmap_parse(buf, len, cpumask_bits(mask), nr_cpumask_bits);
576 if (err) {
577 free_cpumask_var(mask);
578 return err;
579 }
580
581 map = kzalloc(max_t(unsigned,
582 RPS_MAP_SIZE(cpumask_weight(mask)), L1_CACHE_BYTES),
583 GFP_KERNEL);
584 if (!map) {
585 free_cpumask_var(mask);
586 return -ENOMEM;
587 }
588
589 i = 0;
590 for_each_cpu_and(cpu, mask, cpu_online_mask)
591 map->cpus[i++] = cpu;
592
593 if (i)
594 map->len = i;
595 else {
596 kfree(map);
597 map = NULL;
598 }
599
600 spin_lock(&rps_map_lock);
601 old_map = rcu_dereference_protected(queue->rps_map,
602 lockdep_is_held(&rps_map_lock));
603 rcu_assign_pointer(queue->rps_map, map);
604 spin_unlock(&rps_map_lock);
605
606 if (old_map)
607 call_rcu(&old_map->rcu, rps_map_release);
608
609 free_cpumask_var(mask);
610 return len;
611}
612
613static ssize_t show_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
614 struct rx_queue_attribute *attr,
615 char *buf)
616{
617 struct rps_dev_flow_table *flow_table;
618 unsigned int val = 0;
619
620 rcu_read_lock();
621 flow_table = rcu_dereference(queue->rps_flow_table);
622 if (flow_table)
623 val = flow_table->mask + 1;
624 rcu_read_unlock();
625
626 return sprintf(buf, "%u\n", val);
627}
628
629static void rps_dev_flow_table_release_work(struct work_struct *work)
630{
631 struct rps_dev_flow_table *table = container_of(work,
632 struct rps_dev_flow_table, free_work);
633
634 vfree(table);
635}
636
637static void rps_dev_flow_table_release(struct rcu_head *rcu)
638{
639 struct rps_dev_flow_table *table = container_of(rcu,
640 struct rps_dev_flow_table, rcu);
641
642 INIT_WORK(&table->free_work, rps_dev_flow_table_release_work);
643 schedule_work(&table->free_work);
644}
645
646static ssize_t store_rps_dev_flow_table_cnt(struct netdev_rx_queue *queue,
647 struct rx_queue_attribute *attr,
648 const char *buf, size_t len)
649{
650 unsigned int count;
651 char *endp;
652 struct rps_dev_flow_table *table, *old_table;
653 static DEFINE_SPINLOCK(rps_dev_flow_lock);
654
655 if (!capable(CAP_NET_ADMIN))
656 return -EPERM;
657
658 count = simple_strtoul(buf, &endp, 0);
659 if (endp == buf)
660 return -EINVAL;
661
662 if (count) {
663 int i;
664
665 if (count > 1<<30) {
666
667 return -EINVAL;
668 }
669 count = roundup_pow_of_two(count);
670 table = vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count));
671 if (!table)
672 return -ENOMEM;
673
674 table->mask = count - 1;
675 for (i = 0; i < count; i++)
676 table->flows[i].cpu = RPS_NO_CPU;
677 } else
678 table = NULL;
679
680 spin_lock(&rps_dev_flow_lock);
681 old_table = rcu_dereference_protected(queue->rps_flow_table,
682 lockdep_is_held(&rps_dev_flow_lock));
683 rcu_assign_pointer(queue->rps_flow_table, table);
684 spin_unlock(&rps_dev_flow_lock);
685
686 if (old_table)
687 call_rcu(&old_table->rcu, rps_dev_flow_table_release);
688
689 return len;
690}
691
692static struct rx_queue_attribute rps_cpus_attribute =
693 __ATTR(rps_cpus, S_IRUGO | S_IWUSR, show_rps_map, store_rps_map);
694
695
696static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute =
697 __ATTR(rps_flow_cnt, S_IRUGO | S_IWUSR,
698 show_rps_dev_flow_table_cnt, store_rps_dev_flow_table_cnt);
699
700static struct attribute *rx_queue_default_attrs[] = {
701 &rps_cpus_attribute.attr,
702 &rps_dev_flow_table_cnt_attribute.attr,
703 NULL
704};
705
706static void rx_queue_release(struct kobject *kobj)
707{
708 struct netdev_rx_queue *queue = to_rx_queue(kobj);
709 struct netdev_rx_queue *first = queue->first;
710 struct rps_map *map;
711 struct rps_dev_flow_table *flow_table;
712
713
714 map = rcu_dereference_raw(queue->rps_map);
715 if (map) {
716 RCU_INIT_POINTER(queue->rps_map, NULL);
717 call_rcu(&map->rcu, rps_map_release);
718 }
719
720 flow_table = rcu_dereference_raw(queue->rps_flow_table);
721 if (flow_table) {
722 RCU_INIT_POINTER(queue->rps_flow_table, NULL);
723 call_rcu(&flow_table->rcu, rps_dev_flow_table_release);
724 }
725
726 if (atomic_dec_and_test(&first->count))
727 kfree(first);
728 else
729 memset(kobj, 0, sizeof(*kobj));
730}
731
732static struct kobj_type rx_queue_ktype = {
733 .sysfs_ops = &rx_queue_sysfs_ops,
734 .release = rx_queue_release,
735 .default_attrs = rx_queue_default_attrs,
736};
737
738static int rx_queue_add_kobject(struct net_device *net, int index)
739{
740 struct netdev_rx_queue *queue = net->_rx + index;
741 struct netdev_rx_queue *first = queue->first;
742 struct kobject *kobj = &queue->kobj;
743 int error = 0;
744
745 kobj->kset = net->queues_kset;
746 error = kobject_init_and_add(kobj, &rx_queue_ktype, NULL,
747 "rx-%u", index);
748 if (error) {
749 kobject_put(kobj);
750 return error;
751 }
752
753 kobject_uevent(kobj, KOBJ_ADD);
754 atomic_inc(&first->count);
755
756 return error;
757}
758
759int
760net_rx_queue_update_kobjects(struct net_device *net, int old_num, int new_num)
761{
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}
778
779static int rx_queue_register_kobjects(struct net_device *net)
780{
781 net->queues_kset = kset_create_and_add("queues",
782 NULL, &net->dev.kobj);
783 if (!net->queues_kset)
784 return -ENOMEM;
785 return net_rx_queue_update_kobjects(net, 0, net->real_num_rx_queues);
786}
787
788static void rx_queue_remove_kobjects(struct net_device *net)
789{
790 net_rx_queue_update_kobjects(net, net->real_num_rx_queues, 0);
791 kset_unregister(net->queues_kset);
792}
793#endif
794
795static const void *net_current_ns(void)
796{
797 return current->nsproxy->net_ns;
798}
799
800static const void *net_initial_ns(void)
801{
802 return &init_net;
803}
804
805static const void *net_netlink_ns(struct sock *sk)
806{
807 return sock_net(sk);
808}
809
810struct kobj_ns_type_operations net_ns_type_operations = {
811 .type = KOBJ_NS_TYPE_NET,
812 .current_ns = net_current_ns,
813 .netlink_ns = net_netlink_ns,
814 .initial_ns = net_initial_ns,
815};
816EXPORT_SYMBOL_GPL(net_ns_type_operations);
817
818static void net_kobj_ns_exit(struct net *net)
819{
820 kobj_ns_exit(KOBJ_NS_TYPE_NET, net);
821}
822
823static struct pernet_operations kobj_net_ops = {
824 .exit = net_kobj_ns_exit,
825};
826
827
828#ifdef CONFIG_HOTPLUG
829static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
830{
831 struct net_device *dev = to_net_dev(d);
832 int retval;
833
834
835 retval = add_uevent_var(env, "INTERFACE=%s", dev->name);
836 if (retval)
837 goto exit;
838
839
840
841
842 retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
843
844exit:
845 return retval;
846}
847#endif
848
849
850
851
852
853static void netdev_release(struct device *d)
854{
855 struct net_device *dev = to_net_dev(d);
856
857 BUG_ON(dev->reg_state != NETREG_RELEASED);
858
859 kfree(dev->ifalias);
860 kfree((char *)dev - dev->padded);
861}
862
863static const void *net_namespace(struct device *d)
864{
865 struct net_device *dev;
866 dev = container_of(d, struct net_device, dev);
867 return dev_net(dev);
868}
869
870static struct class net_class = {
871 .name = "net",
872 .dev_release = netdev_release,
873#ifdef CONFIG_SYSFS
874 .dev_attrs = net_class_attributes,
875#endif
876#ifdef CONFIG_HOTPLUG
877 .dev_uevent = netdev_uevent,
878#endif
879 .ns_type = &net_ns_type_operations,
880 .namespace = net_namespace,
881};
882
883
884
885
886void netdev_unregister_kobject(struct net_device * net)
887{
888 struct device *dev = &(net->dev);
889
890 kobject_get(&dev->kobj);
891
892#ifdef CONFIG_RPS
893 rx_queue_remove_kobjects(net);
894#endif
895
896 device_del(dev);
897}
898
899
900int netdev_register_kobject(struct net_device *net)
901{
902 struct device *dev = &(net->dev);
903 const struct attribute_group **groups = net->sysfs_groups;
904 int error = 0;
905
906 device_initialize(dev);
907 dev->class = &net_class;
908 dev->platform_data = net;
909 dev->groups = groups;
910
911 dev_set_name(dev, "%s", net->name);
912
913#ifdef CONFIG_SYSFS
914
915 if (*groups)
916 groups++;
917
918 *groups++ = &netstat_group;
919#ifdef CONFIG_WIRELESS_EXT_SYSFS
920 if (net->ieee80211_ptr)
921 *groups++ = &wireless_group;
922#ifdef CONFIG_WIRELESS_EXT
923 else if (net->wireless_handlers)
924 *groups++ = &wireless_group;
925#endif
926#endif
927#endif
928
929 error = device_add(dev);
930 if (error)
931 return error;
932
933#ifdef CONFIG_RPS
934 error = rx_queue_register_kobjects(net);
935 if (error) {
936 device_del(dev);
937 return error;
938 }
939#endif
940
941 return error;
942}
943
944int netdev_class_create_file(struct class_attribute *class_attr)
945{
946 return class_create_file(&net_class, class_attr);
947}
948EXPORT_SYMBOL(netdev_class_create_file);
949
950void netdev_class_remove_file(struct class_attribute *class_attr)
951{
952 class_remove_file(&net_class, class_attr);
953}
954EXPORT_SYMBOL(netdev_class_remove_file);
955
956int netdev_kobject_init(void)
957{
958 kobj_ns_type_register(&net_ns_type_operations);
959 register_pernet_subsys(&kobj_net_ops);
960 return class_register(&net_class);
961}
962
