2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <net/ethernet.h>
24 #include <netinet/ether.h>
31 static struct avl_tree devices
;
32 static struct avl_tree aliases
;
37 struct device_user dep
;
42 static const struct device_type alias_device_type
;
44 static const struct blobmsg_policy dev_attrs
[__DEV_ATTR_MAX
] = {
45 [DEV_ATTR_TYPE
] = { "type", BLOBMSG_TYPE_STRING
},
46 [DEV_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
47 [DEV_ATTR_MTU
] = { "mtu", BLOBMSG_TYPE_INT32
},
48 [DEV_ATTR_MACADDR
] = { "macaddr", BLOBMSG_TYPE_STRING
},
49 [DEV_ATTR_TXQUEUELEN
] = { "txqueuelen", BLOBMSG_TYPE_INT32
},
50 [DEV_ATTR_ENABLED
] = { "enabled", BLOBMSG_TYPE_BOOL
},
53 const struct config_param_list device_attr_list
= {
54 .n_params
= __DEV_ATTR_MAX
,
58 static int __devlock
= 0;
60 void device_lock(void)
65 void device_unlock(void)
69 device_free_unused(NULL
);
72 static int set_device_state(struct device
*dev
, bool state
)
83 simple_device_set_state(struct device
*dev
, bool state
)
88 pdev
= dev
->parent
.dev
;
90 pdev
= system_if_get_parent(dev
);
92 device_add_user(&dev
->parent
, pdev
);
97 ret
= device_claim(&dev
->parent
);
99 device_release(&dev
->parent
);
104 return set_device_state(dev
, state
);
107 static struct device
*
108 simple_device_create(const char *name
, struct blob_attr
*attr
)
110 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
111 struct device
*dev
= NULL
;
113 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
114 dev
= device_get(name
, true);
118 dev
->set_state
= simple_device_set_state
;
119 device_init_settings(dev
, tb
);
124 static void simple_device_free(struct device
*dev
)
127 device_remove_user(&dev
->parent
);
131 const struct device_type simple_device_type
= {
132 .name
= "Network device",
133 .config_params
= &device_attr_list
,
135 .create
= simple_device_create
,
136 .check_state
= system_if_check
,
137 .free
= simple_device_free
,
141 alias_device_set_state(struct device
*dev
, bool state
)
143 struct alias_device
*alias
;
145 alias
= container_of(dev
, struct alias_device
, dev
);
150 return device_claim(&alias
->dep
);
152 device_release(&alias
->dep
);
154 device_remove_user(&alias
->dep
);
158 static struct device
*
159 alias_device_create(const char *name
, struct blob_attr
*attr
)
161 struct alias_device
*alias
;
163 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
164 strcpy(alias
->name
, name
);
165 alias
->dev
.set_state
= alias_device_set_state
;
166 alias
->dev
.hidden
= true;
167 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
168 alias
->avl
.key
= alias
->name
;
169 avl_insert(&aliases
, &alias
->avl
);
174 static void alias_device_free(struct device
*dev
)
176 struct alias_device
*alias
;
178 alias
= container_of(dev
, struct alias_device
, dev
);
179 avl_delete(&aliases
, &alias
->avl
);
183 static const struct device_type alias_device_type
= {
184 .name
= "Network alias",
185 .create
= alias_device_create
,
186 .free
= alias_device_free
,
190 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
192 struct device_settings
*os
= &dev
->orig_settings
;
193 struct device_settings
*s
= &dev
->settings
;
195 memset(n
, 0, sizeof(*n
));
196 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
197 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
198 s
->txqueuelen
: os
->txqueuelen
;
200 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
202 n
->flags
= s
->flags
| os
->flags
;
206 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
208 struct device_settings
*s
= &dev
->settings
;
209 struct blob_attr
*cur
;
210 struct ether_addr
*ea
;
211 bool disabled
= false;
214 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
215 disabled
= !blobmsg_get_bool(cur
);
217 if ((cur
= tb
[DEV_ATTR_MTU
])) {
218 s
->mtu
= blobmsg_get_u32(cur
);
219 s
->flags
|= DEV_OPT_MTU
;
222 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
223 s
->txqueuelen
= blobmsg_get_u32(cur
);
224 s
->flags
|= DEV_OPT_TXQUEUELEN
;
227 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
228 ea
= ether_aton(blobmsg_data(cur
));
230 memcpy(s
->macaddr
, ea
, 6);
231 s
->flags
|= DEV_OPT_MACADDR
;
235 device_set_disabled(dev
, disabled
);
238 static void __init
dev_init(void)
240 avl_init(&devices
, avl_strcmp
, true, NULL
);
241 avl_init(&aliases
, avl_strcmp
, false, NULL
);
244 void device_broadcast_event(struct device
*dev
, enum device_event ev
)
246 struct device_user
*dep
, *tmp
;
248 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
257 alias_notify_device(const char *name
, struct device
*dev
)
259 struct alias_device
*alias
;
263 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
267 alias
->cleanup
= !dev
;
269 if (dev
!= alias
->dep
.dev
) {
270 device_remove_user(&alias
->dep
);
271 strcpy(alias
->dev
.ifname
, dev
->ifname
);
272 device_add_user(&alias
->dep
, dev
);
273 alias
->dev
.hidden
= false;
274 device_broadcast_event(&alias
->dev
, DEV_EVENT_UPDATE_IFNAME
);
278 device_set_present(&alias
->dev
, !!dev
);
280 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
) {
281 device_remove_user(&alias
->dep
);
282 alias
->dev
.hidden
= true;
283 alias
->dev
.ifname
[0] = 0;
284 device_broadcast_event(&alias
->dev
, DEV_EVENT_UPDATE_IFNAME
);
290 int device_claim(struct device_user
*dep
)
292 struct device
*dev
= dep
->dev
;
299 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
300 if (++dev
->active
!= 1)
303 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
304 ret
= dev
->set_state(dev
, true);
306 device_broadcast_event(dev
, DEV_EVENT_UP
);
308 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
310 dep
->claimed
= false;
316 void device_release(struct device_user
*dep
)
318 struct device
*dev
= dep
->dev
;
323 dep
->claimed
= false;
325 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
326 assert(dev
->active
>= 0);
331 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
333 dev
->set_state(dev
, false);
334 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
337 int device_check_state(struct device
*dev
)
339 if (!dev
->type
->check_state
)
342 return dev
->type
->check_state(dev
);
345 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
351 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
353 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
354 INIT_LIST_HEAD(&dev
->users
);
358 dev
->set_state
= set_device_state
;
361 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
365 device_init_virtual(dev
, type
, ifname
);
367 dev
->avl
.key
= dev
->ifname
;
369 ret
= avl_insert(&devices
, &dev
->avl
);
373 system_if_clear_state(dev
);
374 device_check_state(dev
);
379 static struct device
*
380 device_create_default(const char *name
, bool external
)
384 if (!external
&& system_if_force_external(name
))
387 D(DEVICE
, "Create simple device '%s'\n", name
);
388 dev
= calloc(1, sizeof(*dev
));
389 dev
->external
= external
;
390 dev
->set_state
= simple_device_set_state
;
391 device_init(dev
, &simple_device_type
, name
);
392 dev
->default_config
= true;
396 static struct device
*
397 device_alias_get(const char *name
)
399 struct alias_device
*alias
;
401 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
405 return alias_device_create(name
, NULL
);
409 device_get(const char *name
, int create
)
413 if (strchr(name
, '.'))
414 return get_vlan_device_chain(name
, create
);
417 return device_alias_get(name
+ 1);
419 dev
= avl_find_element(&devices
, name
, dev
, avl
);
426 return device_create_default(name
, create
> 1);
430 device_delete(struct device
*dev
)
435 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
436 avl_delete(&devices
, &dev
->avl
);
440 void device_cleanup(struct device
*dev
)
442 struct device_user
*dep
, *tmp
;
444 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
445 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
449 dep
->cb(dep
, DEV_EVENT_REMOVE
);
456 static void __device_set_present(struct device
*dev
, bool state
)
458 if (dev
->present
== state
)
461 dev
->present
= state
;
462 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
466 device_refresh_present(struct device
*dev
)
468 bool state
= dev
->sys_present
;
470 if (dev
->disabled
|| dev
->deferred
)
473 __device_set_present(dev
, state
);
476 void device_set_present(struct device
*dev
, bool state
)
478 if (dev
->sys_present
== state
)
481 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
482 dev
->sys_present
= state
;
483 device_refresh_present(dev
);
486 void device_add_user(struct device_user
*dep
, struct device
*dev
)
489 device_remove_user(dep
);
495 list_add_tail(&dep
->list
, &dev
->users
);
496 if (dep
->cb
&& dev
->present
) {
497 dep
->cb(dep
, DEV_EVENT_ADD
);
499 dep
->cb(dep
, DEV_EVENT_UP
);
504 device_free(struct device
*dev
)
509 dev
->type
->free(dev
);
514 __device_free_unused(struct device
*dev
)
516 if (!list_empty(&dev
->users
) || dev
->current_config
|| __devlock
)
522 void device_remove_user(struct device_user
*dep
)
524 struct device
*dev
= dep
->dev
;
529 dep
->hotplug
= false;
533 list_del(&dep
->list
);
535 __device_free_unused(dev
);
539 device_free_unused(struct device
*dev
)
544 return __device_free_unused(dev
);
546 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
547 __device_free_unused(dev
);
551 device_init_pending(void)
553 struct device
*dev
, *tmp
;
555 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
556 if (!dev
->config_pending
)
559 dev
->type
->config_init(dev
);
560 dev
->config_pending
= false;
564 static enum dev_change_type
565 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
567 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
568 const struct config_param_list
*cfg
= dev
->type
->config_params
;
570 if (config_check_equal(dev
->config
, attr
, cfg
))
571 return DEV_CONFIG_NO_CHANGE
;
573 if (cfg
== &device_attr_list
) {
574 memset(tb
, 0, sizeof(tb
));
577 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
578 blob_data(attr
), blob_len(attr
));
580 device_init_settings(dev
, tb
);
581 return DEV_CONFIG_RESTART
;
583 return DEV_CONFIG_RECREATE
;
587 device_set_config(struct device
*dev
, const struct device_type
*type
,
588 struct blob_attr
*attr
)
590 if (type
!= dev
->type
)
591 return DEV_CONFIG_RECREATE
;
593 if (dev
->type
->reload
)
594 return dev
->type
->reload(dev
, attr
);
596 return device_reload_config(dev
, attr
);
600 device_replace(struct device
*dev
, struct device
*odev
)
602 struct device_user
*dep
, *tmp
;
603 bool present
= odev
->present
;
606 device_set_present(odev
, false);
608 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
610 list_move_tail(&dep
->list
, &dev
->users
);
616 device_set_present(dev
, true);
620 device_reset_config(void)
624 avl_for_each_element(&devices
, dev
, avl
)
625 dev
->current_config
= false;
629 device_reset_old(void)
631 struct device
*dev
, *tmp
, *ndev
;
633 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
634 if (dev
->current_config
|| dev
->default_config
)
637 if (dev
->type
!= &simple_device_type
)
640 ndev
= device_create_default(dev
->ifname
, dev
->external
);
641 device_replace(ndev
, dev
);
646 device_create(const char *name
, const struct device_type
*type
,
647 struct blob_attr
*config
)
649 struct device
*odev
= NULL
, *dev
;
650 enum dev_change_type change
;
652 config
= config_memdup(config
);
656 odev
= device_get(name
, false);
658 odev
->current_config
= true;
659 change
= device_set_config(odev
, type
, config
);
661 case DEV_CONFIG_RESTART
:
662 case DEV_CONFIG_APPLIED
:
663 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
665 odev
->config
= config
;
666 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
667 device_set_present(odev
, false);
668 device_set_present(odev
, true);
671 case DEV_CONFIG_NO_CHANGE
:
672 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
675 case DEV_CONFIG_RECREATE
:
676 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
681 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
683 dev
= type
->create(name
, config
);
687 dev
->current_config
= true;
688 dev
->config
= config
;
690 device_replace(dev
, odev
);
692 if (!config_init
&& dev
->config_pending
)
693 type
->config_init(dev
);
699 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
701 struct device_settings st
;
705 avl_for_each_element(&devices
, dev
, avl
) {
708 c
= blobmsg_open_table(b
, dev
->ifname
);
709 device_dump_status(b
, dev
);
710 blobmsg_close_table(b
, c
);
716 blobmsg_add_u8(b
, "external", dev
->external
);
717 blobmsg_add_u8(b
, "present", dev
->present
);
718 blobmsg_add_string(b
, "type", dev
->type
->name
);
723 blobmsg_add_u8(b
, "up", !!dev
->active
);
724 if (dev
->type
->dump_info
)
725 dev
->type
->dump_info(dev
, b
);
727 system_if_dump_info(dev
, b
);
730 device_merge_settings(dev
, &st
);
731 if (st
.flags
& DEV_OPT_MTU
)
732 blobmsg_add_u32(b
, "mtu", st
.mtu
);
733 if (st
.flags
& DEV_OPT_MACADDR
)
734 blobmsg_add_string(b
, "macaddr", ether_ntoa((struct ether_addr
*) st
.macaddr
));
735 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
736 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
739 s
= blobmsg_open_table(b
, "statistics");
740 if (dev
->type
->dump_stats
)
741 dev
->type
->dump_stats(dev
, b
);
743 system_if_dump_stats(dev
, b
);
744 blobmsg_close_table(b
, s
);