2 * net-sysfs.c - network device class and attributes
4 * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
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.
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>
18 #include <linux/rtnetlink.h>
19 #include <linux/wireless.h>
20 #include <linux/vmalloc.h>
23 #include "net-sysfs.h"
26 static const char fmt_hex
[] = "%#x\n";
27 static const char fmt_long_hex
[] = "%#lx\n";
28 static const char fmt_dec
[] = "%d\n";
29 static const char fmt_ulong
[] = "%lu\n";
31 static inline int dev_isalive(const struct net_device
*dev
)
33 return dev
->reg_state
<= NETREG_REGISTERED
;
36 /* use same locking rules as GIF* ioctl's */
37 static ssize_t
netdev_show(const struct device
*dev
,
38 struct device_attribute
*attr
, char *buf
,
39 ssize_t (*format
)(const struct net_device
*, char *))
41 struct net_device
*net
= to_net_dev(dev
);
42 ssize_t ret
= -EINVAL
;
44 read_lock(&dev_base_lock
);
46 ret
= (*format
)(net
, buf
);
47 read_unlock(&dev_base_lock
);
52 /* generate a show function for simple field */
53 #define NETDEVICE_SHOW(field, format_string) \
54 static ssize_t format_##field(const struct net_device *net, char *buf) \
56 return sprintf(buf, format_string, net->field); \
58 static ssize_t show_##field(struct device *dev, \
59 struct device_attribute *attr, char *buf) \
61 return netdev_show(dev, attr, buf, format_##field); \
65 /* use same locking and permission rules as SIF* ioctl's */
66 static ssize_t
netdev_store(struct device
*dev
, struct device_attribute
*attr
,
67 const char *buf
, size_t len
,
68 int (*set
)(struct net_device
*, unsigned long))
70 struct net_device
*net
= to_net_dev(dev
);
75 if (!capable(CAP_NET_ADMIN
))
78 new = simple_strtoul(buf
, &endp
, 0);
83 return restart_syscall();
85 if (dev_isalive(net
)) {
86 if ((ret
= (*set
)(net
, new)) == 0)
94 NETDEVICE_SHOW(dev_id
, fmt_hex
);
95 NETDEVICE_SHOW(addr_len
, fmt_dec
);
96 NETDEVICE_SHOW(iflink
, fmt_dec
);
97 NETDEVICE_SHOW(ifindex
, fmt_dec
);
98 NETDEVICE_SHOW(features
, fmt_long_hex
);
99 NETDEVICE_SHOW(type
, fmt_dec
);
100 NETDEVICE_SHOW(link_mode
, fmt_dec
);
102 /* use same locking rules as GIFHWADDR ioctl's */
103 static ssize_t
show_address(struct device
*dev
, struct device_attribute
*attr
,
106 struct net_device
*net
= to_net_dev(dev
);
107 ssize_t ret
= -EINVAL
;
109 read_lock(&dev_base_lock
);
110 if (dev_isalive(net
))
111 ret
= sysfs_format_mac(buf
, net
->dev_addr
, net
->addr_len
);
112 read_unlock(&dev_base_lock
);
116 static ssize_t
show_broadcast(struct device
*dev
,
117 struct device_attribute
*attr
, char *buf
)
119 struct net_device
*net
= to_net_dev(dev
);
120 if (dev_isalive(net
))
121 return sysfs_format_mac(buf
, net
->broadcast
, net
->addr_len
);
125 static ssize_t
show_carrier(struct device
*dev
,
126 struct device_attribute
*attr
, char *buf
)
128 struct net_device
*netdev
= to_net_dev(dev
);
129 if (netif_running(netdev
)) {
130 return sprintf(buf
, fmt_dec
, !!netif_carrier_ok(netdev
));
135 static ssize_t
show_speed(struct device
*dev
,
136 struct device_attribute
*attr
, char *buf
)
138 struct net_device
*netdev
= to_net_dev(dev
);
142 return restart_syscall();
144 if (netif_running(netdev
) &&
145 netdev
->ethtool_ops
&&
146 netdev
->ethtool_ops
->get_settings
) {
147 struct ethtool_cmd cmd
= { ETHTOOL_GSET
};
149 if (!netdev
->ethtool_ops
->get_settings(netdev
, &cmd
))
150 ret
= sprintf(buf
, fmt_dec
, ethtool_cmd_speed(&cmd
));
156 static ssize_t
show_duplex(struct device
*dev
,
157 struct device_attribute
*attr
, char *buf
)
159 struct net_device
*netdev
= to_net_dev(dev
);
163 return restart_syscall();
165 if (netif_running(netdev
) &&
166 netdev
->ethtool_ops
&&
167 netdev
->ethtool_ops
->get_settings
) {
168 struct ethtool_cmd cmd
= { ETHTOOL_GSET
};
170 if (!netdev
->ethtool_ops
->get_settings(netdev
, &cmd
))
171 ret
= sprintf(buf
, "%s\n", cmd
.duplex
? "full" : "half");
177 static ssize_t
show_dormant(struct device
*dev
,
178 struct device_attribute
*attr
, char *buf
)
180 struct net_device
*netdev
= to_net_dev(dev
);
182 if (netif_running(netdev
))
183 return sprintf(buf
, fmt_dec
, !!netif_dormant(netdev
));
188 static const char *const operstates
[] = {
190 "notpresent", /* currently unused */
193 "testing", /* currently unused */
198 static ssize_t
show_operstate(struct device
*dev
,
199 struct device_attribute
*attr
, char *buf
)
201 const struct net_device
*netdev
= to_net_dev(dev
);
202 unsigned char operstate
;
204 read_lock(&dev_base_lock
);
205 operstate
= netdev
->operstate
;
206 if (!netif_running(netdev
))
207 operstate
= IF_OPER_DOWN
;
208 read_unlock(&dev_base_lock
);
210 if (operstate
>= ARRAY_SIZE(operstates
))
211 return -EINVAL
; /* should not happen */
213 return sprintf(buf
, "%s\n", operstates
[operstate
]);
216 /* read-write attributes */
217 NETDEVICE_SHOW(mtu
, fmt_dec
);
219 static int change_mtu(struct net_device
*net
, unsigned long new_mtu
)
221 return dev_set_mtu(net
, (int) new_mtu
);
224 static ssize_t
store_mtu(struct device
*dev
, struct device_attribute
*attr
,
225 const char *buf
, size_t len
)
227 return netdev_store(dev
, attr
, buf
, len
, change_mtu
);
230 NETDEVICE_SHOW(flags
, fmt_hex
);
232 static int change_flags(struct net_device
*net
, unsigned long new_flags
)
234 return dev_change_flags(net
, (unsigned) new_flags
);
237 static ssize_t
store_flags(struct device
*dev
, struct device_attribute
*attr
,
238 const char *buf
, size_t len
)
240 return netdev_store(dev
, attr
, buf
, len
, change_flags
);
243 NETDEVICE_SHOW(tx_queue_len
, fmt_ulong
);
245 static int change_tx_queue_len(struct net_device
*net
, unsigned long new_len
)
247 net
->tx_queue_len
= new_len
;
251 static ssize_t
store_tx_queue_len(struct device
*dev
,
252 struct device_attribute
*attr
,
253 const char *buf
, size_t len
)
255 return netdev_store(dev
, attr
, buf
, len
, change_tx_queue_len
);
258 static ssize_t
store_ifalias(struct device
*dev
, struct device_attribute
*attr
,
259 const char *buf
, size_t len
)
261 struct net_device
*netdev
= to_net_dev(dev
);
265 if (!capable(CAP_NET_ADMIN
))
268 /* ignore trailing newline */
269 if (len
> 0 && buf
[len
- 1] == '\n')
273 return restart_syscall();
274 ret
= dev_set_alias(netdev
, buf
, count
);
277 return ret
< 0 ? ret
: len
;
280 static ssize_t
show_ifalias(struct device
*dev
,
281 struct device_attribute
*attr
, char *buf
)
283 const struct net_device
*netdev
= to_net_dev(dev
);
287 return restart_syscall();
289 ret
= sprintf(buf
, "%s\n", netdev
->ifalias
);
294 static struct device_attribute net_class_attributes
[] = {
295 __ATTR(addr_len
, S_IRUGO
, show_addr_len
, NULL
),
296 __ATTR(dev_id
, S_IRUGO
, show_dev_id
, NULL
),
297 __ATTR(ifalias
, S_IRUGO
| S_IWUSR
, show_ifalias
, store_ifalias
),
298 __ATTR(iflink
, S_IRUGO
, show_iflink
, NULL
),
299 __ATTR(ifindex
, S_IRUGO
, show_ifindex
, NULL
),
300 __ATTR(features
, S_IRUGO
, show_features
, NULL
),
301 __ATTR(type
, S_IRUGO
, show_type
, NULL
),
302 __ATTR(link_mode
, S_IRUGO
, show_link_mode
, NULL
),
303 __ATTR(address
, S_IRUGO
, show_address
, NULL
),
304 __ATTR(broadcast
, S_IRUGO
, show_broadcast
, NULL
),
305 __ATTR(carrier
, S_IRUGO
, show_carrier
, NULL
),
306 __ATTR(speed
, S_IRUGO
, show_speed
, NULL
),
307 __ATTR(duplex
, S_IRUGO
, show_duplex
, NULL
),
308 __ATTR(dormant
, S_IRUGO
, show_dormant
, NULL
),
309 __ATTR(operstate
, S_IRUGO
, show_operstate
, NULL
),
310 __ATTR(mtu
, S_IRUGO
| S_IWUSR
, show_mtu
, store_mtu
),
311 __ATTR(flags
, S_IRUGO
| S_IWUSR
, show_flags
, store_flags
),
312 __ATTR(tx_queue_len
, S_IRUGO
| S_IWUSR
, show_tx_queue_len
,
317 /* Show a given an attribute in the statistics group */
318 static ssize_t
netstat_show(const struct device
*d
,
319 struct device_attribute
*attr
, char *buf
,
320 unsigned long offset
)
322 struct net_device
*dev
= to_net_dev(d
);
323 ssize_t ret
= -EINVAL
;
325 WARN_ON(offset
> sizeof(struct net_device_stats
) ||
326 offset
% sizeof(unsigned long) != 0);
328 read_lock(&dev_base_lock
);
329 if (dev_isalive(dev
)) {
330 const struct net_device_stats
*stats
= dev_get_stats(dev
);
331 ret
= sprintf(buf
, fmt_ulong
,
332 *(unsigned long *)(((u8
*) stats
) + offset
));
334 read_unlock(&dev_base_lock
);
338 /* generate a read-only statistics attribute */
339 #define NETSTAT_ENTRY(name) \
340 static ssize_t show_##name(struct device *d, \
341 struct device_attribute *attr, char *buf) \
343 return netstat_show(d, attr, buf, \
344 offsetof(struct net_device_stats, name)); \
346 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
348 NETSTAT_ENTRY(rx_packets
);
349 NETSTAT_ENTRY(tx_packets
);
350 NETSTAT_ENTRY(rx_bytes
);
351 NETSTAT_ENTRY(tx_bytes
);
352 NETSTAT_ENTRY(rx_errors
);
353 NETSTAT_ENTRY(tx_errors
);
354 NETSTAT_ENTRY(rx_dropped
);
355 NETSTAT_ENTRY(tx_dropped
);
356 NETSTAT_ENTRY(multicast
);
357 NETSTAT_ENTRY(collisions
);
358 NETSTAT_ENTRY(rx_length_errors
);
359 NETSTAT_ENTRY(rx_over_errors
);
360 NETSTAT_ENTRY(rx_crc_errors
);
361 NETSTAT_ENTRY(rx_frame_errors
);
362 NETSTAT_ENTRY(rx_fifo_errors
);
363 NETSTAT_ENTRY(rx_missed_errors
);
364 NETSTAT_ENTRY(tx_aborted_errors
);
365 NETSTAT_ENTRY(tx_carrier_errors
);
366 NETSTAT_ENTRY(tx_fifo_errors
);
367 NETSTAT_ENTRY(tx_heartbeat_errors
);
368 NETSTAT_ENTRY(tx_window_errors
);
369 NETSTAT_ENTRY(rx_compressed
);
370 NETSTAT_ENTRY(tx_compressed
);
372 static struct attribute
*netstat_attrs
[] = {
373 &dev_attr_rx_packets
.attr
,
374 &dev_attr_tx_packets
.attr
,
375 &dev_attr_rx_bytes
.attr
,
376 &dev_attr_tx_bytes
.attr
,
377 &dev_attr_rx_errors
.attr
,
378 &dev_attr_tx_errors
.attr
,
379 &dev_attr_rx_dropped
.attr
,
380 &dev_attr_tx_dropped
.attr
,
381 &dev_attr_multicast
.attr
,
382 &dev_attr_collisions
.attr
,
383 &dev_attr_rx_length_errors
.attr
,
384 &dev_attr_rx_over_errors
.attr
,
385 &dev_attr_rx_crc_errors
.attr
,
386 &dev_attr_rx_frame_errors
.attr
,
387 &dev_attr_rx_fifo_errors
.attr
,
388 &dev_attr_rx_missed_errors
.attr
,
389 &dev_attr_tx_aborted_errors
.attr
,
390 &dev_attr_tx_carrier_errors
.attr
,
391 &dev_attr_tx_fifo_errors
.attr
,
392 &dev_attr_tx_heartbeat_errors
.attr
,
393 &dev_attr_tx_window_errors
.attr
,
394 &dev_attr_rx_compressed
.attr
,
395 &dev_attr_tx_compressed
.attr
,
400 static struct attribute_group netstat_group
= {
401 .name
= "statistics",
402 .attrs
= netstat_attrs
,
405 #ifdef CONFIG_WIRELESS_EXT_SYSFS
406 /* helper function that does all the locking etc for wireless stats */
407 static ssize_t
wireless_show(struct device
*d
, char *buf
,
408 ssize_t (*format
)(const struct iw_statistics
*,
411 struct net_device
*dev
= to_net_dev(d
);
412 const struct iw_statistics
*iw
;
413 ssize_t ret
= -EINVAL
;
416 return restart_syscall();
417 if (dev_isalive(dev
)) {
418 iw
= get_wireless_stats(dev
);
420 ret
= (*format
)(iw
, buf
);
427 /* show function template for wireless fields */
428 #define WIRELESS_SHOW(name, field, format_string) \
429 static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
431 return sprintf(buf, format_string, iw->field); \
433 static ssize_t show_iw_##name(struct device *d, \
434 struct device_attribute *attr, char *buf) \
436 return wireless_show(d, buf, format_iw_##name); \
438 static DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
440 WIRELESS_SHOW(status
, status
, fmt_hex
);
441 WIRELESS_SHOW(link
, qual
.qual
, fmt_dec
);
442 WIRELESS_SHOW(level
, qual
.level
, fmt_dec
);
443 WIRELESS_SHOW(noise
, qual
.noise
, fmt_dec
);
444 WIRELESS_SHOW(nwid
, discard
.nwid
, fmt_dec
);
445 WIRELESS_SHOW(crypt
, discard
.code
, fmt_dec
);
446 WIRELESS_SHOW(fragment
, discard
.fragment
, fmt_dec
);
447 WIRELESS_SHOW(misc
, discard
.misc
, fmt_dec
);
448 WIRELESS_SHOW(retries
, discard
.retries
, fmt_dec
);
449 WIRELESS_SHOW(beacon
, miss
.beacon
, fmt_dec
);
451 static struct attribute
*wireless_attrs
[] = {
452 &dev_attr_status
.attr
,
454 &dev_attr_level
.attr
,
455 &dev_attr_noise
.attr
,
457 &dev_attr_crypt
.attr
,
458 &dev_attr_fragment
.attr
,
459 &dev_attr_retries
.attr
,
461 &dev_attr_beacon
.attr
,
465 static struct attribute_group wireless_group
= {
467 .attrs
= wireless_attrs
,
473 * RX queue sysfs structures and functions.
475 struct rx_queue_attribute
{
476 struct attribute attr
;
477 ssize_t (*show
)(struct netdev_rx_queue
*queue
,
478 struct rx_queue_attribute
*attr
, char *buf
);
479 ssize_t (*store
)(struct netdev_rx_queue
*queue
,
480 struct rx_queue_attribute
*attr
, const char *buf
, size_t len
);
482 #define to_rx_queue_attr(_attr) container_of(_attr, \
483 struct rx_queue_attribute, attr)
485 #define to_rx_queue(obj) container_of(obj, struct netdev_rx_queue, kobj)
487 static ssize_t
rx_queue_attr_show(struct kobject
*kobj
, struct attribute
*attr
,
490 struct rx_queue_attribute
*attribute
= to_rx_queue_attr(attr
);
491 struct netdev_rx_queue
*queue
= to_rx_queue(kobj
);
493 if (!attribute
->show
)
496 return attribute
->show(queue
, attribute
, buf
);
499 static ssize_t
rx_queue_attr_store(struct kobject
*kobj
, struct attribute
*attr
,
500 const char *buf
, size_t count
)
502 struct rx_queue_attribute
*attribute
= to_rx_queue_attr(attr
);
503 struct netdev_rx_queue
*queue
= to_rx_queue(kobj
);
505 if (!attribute
->store
)
508 return attribute
->store(queue
, attribute
, buf
, count
);
511 static struct sysfs_ops rx_queue_sysfs_ops
= {
512 .show
= rx_queue_attr_show
,
513 .store
= rx_queue_attr_store
,
516 static ssize_t
show_rps_map(struct netdev_rx_queue
*queue
,
517 struct rx_queue_attribute
*attribute
, char *buf
)
524 if (!zalloc_cpumask_var(&mask
, GFP_KERNEL
))
528 map
= rcu_dereference(queue
->rps_map
);
530 for (i
= 0; i
< map
->len
; i
++)
531 cpumask_set_cpu(map
->cpus
[i
], mask
);
533 len
+= cpumask_scnprintf(buf
+ len
, PAGE_SIZE
, mask
);
534 if (PAGE_SIZE
- len
< 3) {
536 free_cpumask_var(mask
);
541 free_cpumask_var(mask
);
542 len
+= sprintf(buf
+ len
, "\n");
546 static void rps_map_release(struct rcu_head
*rcu
)
548 struct rps_map
*map
= container_of(rcu
, struct rps_map
, rcu
);
553 static ssize_t
store_rps_map(struct netdev_rx_queue
*queue
,
554 struct rx_queue_attribute
*attribute
,
555 const char *buf
, size_t len
)
557 struct rps_map
*old_map
, *map
;
560 static DEFINE_SPINLOCK(rps_map_lock
);
562 if (!capable(CAP_NET_ADMIN
))
565 if (!alloc_cpumask_var(&mask
, GFP_KERNEL
))
568 err
= bitmap_parse(buf
, len
, cpumask_bits(mask
), nr_cpumask_bits
);
570 free_cpumask_var(mask
);
574 map
= kzalloc(max_t(unsigned,
575 RPS_MAP_SIZE(cpumask_weight(mask
)), L1_CACHE_BYTES
),
578 free_cpumask_var(mask
);
583 for_each_cpu_and(cpu
, mask
, cpu_online_mask
)
584 map
->cpus
[i
++] = cpu
;
593 spin_lock(&rps_map_lock
);
594 old_map
= queue
->rps_map
;
595 rcu_assign_pointer(queue
->rps_map
, map
);
596 spin_unlock(&rps_map_lock
);
599 call_rcu(&old_map
->rcu
, rps_map_release
);
601 free_cpumask_var(mask
);
605 static ssize_t
show_rps_dev_flow_table_cnt(struct netdev_rx_queue
*queue
,
606 struct rx_queue_attribute
*attr
,
609 struct rps_dev_flow_table
*flow_table
;
610 unsigned int val
= 0;
613 flow_table
= rcu_dereference(queue
->rps_flow_table
);
615 val
= flow_table
->mask
+ 1;
618 return sprintf(buf
, "%u\n", val
);
621 static void rps_dev_flow_table_release_work(struct work_struct
*work
)
623 struct rps_dev_flow_table
*table
= container_of(work
,
624 struct rps_dev_flow_table
, free_work
);
629 static void rps_dev_flow_table_release(struct rcu_head
*rcu
)
631 struct rps_dev_flow_table
*table
= container_of(rcu
,
632 struct rps_dev_flow_table
, rcu
);
634 INIT_WORK(&table
->free_work
, rps_dev_flow_table_release_work
);
635 schedule_work(&table
->free_work
);
638 static ssize_t
store_rps_dev_flow_table_cnt(struct netdev_rx_queue
*queue
,
639 struct rx_queue_attribute
*attr
,
640 const char *buf
, size_t len
)
644 struct rps_dev_flow_table
*table
, *old_table
;
645 static DEFINE_SPINLOCK(rps_dev_flow_lock
);
647 if (!capable(CAP_NET_ADMIN
))
650 count
= simple_strtoul(buf
, &endp
, 0);
658 /* Enforce a limit to prevent overflow */
661 count
= roundup_pow_of_two(count
);
662 table
= vmalloc(RPS_DEV_FLOW_TABLE_SIZE(count
));
666 table
->mask
= count
- 1;
667 for (i
= 0; i
< count
; i
++)
668 table
->flows
[i
].cpu
= RPS_NO_CPU
;
672 spin_lock(&rps_dev_flow_lock
);
673 old_table
= queue
->rps_flow_table
;
674 rcu_assign_pointer(queue
->rps_flow_table
, table
);
675 spin_unlock(&rps_dev_flow_lock
);
678 call_rcu(&old_table
->rcu
, rps_dev_flow_table_release
);
683 static struct rx_queue_attribute rps_cpus_attribute
=
684 __ATTR(rps_cpus
, S_IRUGO
| S_IWUSR
, show_rps_map
, store_rps_map
);
687 static struct rx_queue_attribute rps_dev_flow_table_cnt_attribute
=
688 __ATTR(rps_flow_cnt
, S_IRUGO
| S_IWUSR
,
689 show_rps_dev_flow_table_cnt
, store_rps_dev_flow_table_cnt
);
691 static struct attribute
*rx_queue_default_attrs
[] = {
692 &rps_cpus_attribute
.attr
,
693 &rps_dev_flow_table_cnt_attribute
.attr
,
697 static void rx_queue_release(struct kobject
*kobj
)
699 struct netdev_rx_queue
*queue
= to_rx_queue(kobj
);
700 struct netdev_rx_queue
*first
= queue
->first
;
703 call_rcu(&queue
->rps_map
->rcu
, rps_map_release
);
705 if (queue
->rps_flow_table
)
706 call_rcu(&queue
->rps_flow_table
->rcu
,
707 rps_dev_flow_table_release
);
709 if (atomic_dec_and_test(&first
->count
))
713 static struct kobj_type rx_queue_ktype
= {
714 .sysfs_ops
= &rx_queue_sysfs_ops
,
715 .release
= rx_queue_release
,
716 .default_attrs
= rx_queue_default_attrs
,
719 static int rx_queue_add_kobject(struct net_device
*net
, int index
)
721 struct netdev_rx_queue
*queue
= net
->_rx
+ index
;
722 struct kobject
*kobj
= &queue
->kobj
;
725 kobj
->kset
= net
->queues_kset
;
726 error
= kobject_init_and_add(kobj
, &rx_queue_ktype
, NULL
,
733 kobject_uevent(kobj
, KOBJ_ADD
);
738 static int rx_queue_register_kobjects(struct net_device
*net
)
743 net
->queues_kset
= kset_create_and_add("queues",
744 NULL
, &net
->dev
.kobj
);
745 if (!net
->queues_kset
)
747 for (i
= 0; i
< net
->num_rx_queues
; i
++) {
748 error
= rx_queue_add_kobject(net
, i
);
755 kobject_put(&net
->_rx
[i
].kobj
);
760 static void rx_queue_remove_kobjects(struct net_device
*net
)
764 for (i
= 0; i
< net
->num_rx_queues
; i
++)
765 kobject_put(&net
->_rx
[i
].kobj
);
766 kset_unregister(net
->queues_kset
);
768 #endif /* CONFIG_RPS */
769 #endif /* CONFIG_SYSFS */
771 #ifdef CONFIG_HOTPLUG
772 static int netdev_uevent(struct device
*d
, struct kobj_uevent_env
*env
)
774 struct net_device
*dev
= to_net_dev(d
);
777 if (!net_eq(dev_net(dev
), &init_net
))
780 /* pass interface to uevent. */
781 retval
= add_uevent_var(env
, "INTERFACE=%s", dev
->name
);
785 /* pass ifindex to uevent.
786 * ifindex is useful as it won't change (interface name may change)
787 * and is what RtNetlink uses natively. */
788 retval
= add_uevent_var(env
, "IFINDEX=%d", dev
->ifindex
);
796 * netdev_release -- destroy and free a dead device.
797 * Called when last reference to device kobject is gone.
799 static void netdev_release(struct device
*d
)
801 struct net_device
*dev
= to_net_dev(d
);
803 BUG_ON(dev
->reg_state
!= NETREG_RELEASED
);
806 kfree((char *)dev
- dev
->padded
);
809 static struct class net_class
= {
811 .dev_release
= netdev_release
,
813 .dev_attrs
= net_class_attributes
,
814 #endif /* CONFIG_SYSFS */
815 #ifdef CONFIG_HOTPLUG
816 .dev_uevent
= netdev_uevent
,
820 /* Delete sysfs entries but hold kobject reference until after all
821 * netdev references are gone.
823 void netdev_unregister_kobject(struct net_device
* net
)
825 struct device
*dev
= &(net
->dev
);
827 kobject_get(&dev
->kobj
);
829 if (!net_eq(dev_net(net
), &init_net
))
833 rx_queue_remove_kobjects(net
);
839 /* Create sysfs entries for network device. */
840 int netdev_register_kobject(struct net_device
*net
)
842 struct device
*dev
= &(net
->dev
);
843 const struct attribute_group
**groups
= net
->sysfs_groups
;
846 dev
->class = &net_class
;
847 dev
->platform_data
= net
;
848 dev
->groups
= groups
;
850 dev_set_name(dev
, "%s", net
->name
);
853 /* Allow for a device specific group */
857 *groups
++ = &netstat_group
;
858 #ifdef CONFIG_WIRELESS_EXT_SYSFS
859 if (net
->ieee80211_ptr
)
860 *groups
++ = &wireless_group
;
861 #ifdef CONFIG_WIRELESS_EXT
862 else if (net
->wireless_handlers
)
863 *groups
++ = &wireless_group
;
866 #endif /* CONFIG_SYSFS */
868 if (!net_eq(dev_net(net
), &init_net
))
871 error
= device_add(dev
);
876 error
= rx_queue_register_kobjects(net
);
886 int netdev_class_create_file(struct class_attribute
*class_attr
)
888 return class_create_file(&net_class
, class_attr
);
891 void netdev_class_remove_file(struct class_attribute
*class_attr
)
893 class_remove_file(&net_class
, class_attr
);
896 EXPORT_SYMBOL(netdev_class_create_file
);
897 EXPORT_SYMBOL(netdev_class_remove_file
);
899 void netdev_initialize_kobject(struct net_device
*net
)
901 struct device
*device
= &(net
->dev
);
902 device_initialize(device
);
905 int netdev_kobject_init(void)
907 return class_register(&net_class
);