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 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
167 alias
->avl
.key
= alias
->name
;
168 avl_insert(&aliases
, &alias
->avl
);
173 static void alias_device_free(struct device
*dev
)
175 struct alias_device
*alias
;
177 alias
= container_of(dev
, struct alias_device
, dev
);
178 avl_delete(&aliases
, &alias
->avl
);
182 static const struct device_type alias_device_type
= {
183 .name
= "Network alias",
184 .create
= alias_device_create
,
185 .free
= alias_device_free
,
189 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
191 struct device_settings
*os
= &dev
->orig_settings
;
192 struct device_settings
*s
= &dev
->settings
;
194 memset(n
, 0, sizeof(*n
));
195 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
196 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
197 s
->txqueuelen
: os
->txqueuelen
;
199 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
201 n
->flags
= s
->flags
| os
->flags
;
205 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
207 struct device_settings
*s
= &dev
->settings
;
208 struct blob_attr
*cur
;
209 struct ether_addr
*ea
;
210 bool disabled
= false;
213 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
214 disabled
= !blobmsg_get_bool(cur
);
216 if ((cur
= tb
[DEV_ATTR_MTU
])) {
217 s
->mtu
= blobmsg_get_u32(cur
);
218 s
->flags
|= DEV_OPT_MTU
;
221 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
222 s
->txqueuelen
= blobmsg_get_u32(cur
);
223 s
->flags
|= DEV_OPT_TXQUEUELEN
;
226 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
227 ea
= ether_aton(blobmsg_data(cur
));
229 memcpy(s
->macaddr
, ea
, 6);
230 s
->flags
|= DEV_OPT_MACADDR
;
234 device_set_disabled(dev
, disabled
);
237 static void __init
dev_init(void)
239 avl_init(&devices
, avl_strcmp
, true, NULL
);
240 avl_init(&aliases
, avl_strcmp
, false, NULL
);
243 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
245 struct device_user
*dep
, *tmp
;
247 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
256 alias_notify_device(const char *name
, struct device
*dev
)
258 struct alias_device
*alias
;
262 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
266 alias
->cleanup
= !dev
;
268 if (dev
!= alias
->dep
.dev
) {
269 device_remove_user(&alias
->dep
);
270 strcpy(alias
->dev
.ifname
, dev
->ifname
);
271 device_add_user(&alias
->dep
, dev
);
275 device_set_present(&alias
->dev
, !!dev
);
277 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
)
278 device_remove_user(&alias
->dep
);
283 int device_claim(struct device_user
*dep
)
285 struct device
*dev
= dep
->dev
;
292 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
293 if (++dev
->active
!= 1)
296 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
297 ret
= dev
->set_state(dev
, true);
299 device_broadcast_event(dev
, DEV_EVENT_UP
);
301 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
303 dep
->claimed
= false;
309 void device_release(struct device_user
*dep
)
311 struct device
*dev
= dep
->dev
;
316 dep
->claimed
= false;
318 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
319 assert(dev
->active
>= 0);
324 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
326 dev
->set_state(dev
, false);
327 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
330 int device_check_state(struct device
*dev
)
332 if (!dev
->type
->check_state
)
335 return dev
->type
->check_state(dev
);
338 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
344 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
346 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
347 INIT_LIST_HEAD(&dev
->users
);
351 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
355 device_init_virtual(dev
, type
, ifname
);
358 dev
->set_state
= set_device_state
;
360 dev
->avl
.key
= dev
->ifname
;
362 ret
= avl_insert(&devices
, &dev
->avl
);
366 system_if_clear_state(dev
);
367 device_check_state(dev
);
372 static struct device
*
373 device_create_default(const char *name
, bool external
)
377 D(DEVICE
, "Create simple device '%s'\n", name
);
378 dev
= calloc(1, sizeof(*dev
));
379 dev
->external
= external
;
380 dev
->set_state
= simple_device_set_state
;
381 device_init(dev
, &simple_device_type
, name
);
382 dev
->default_config
= true;
386 static struct device
*
387 device_alias_get(const char *name
)
389 struct alias_device
*alias
;
391 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
395 return alias_device_create(name
, NULL
);
399 device_get(const char *name
, int create
)
403 if (strchr(name
, '.'))
404 return get_vlan_device_chain(name
, create
);
407 return device_alias_get(name
+ 1);
409 dev
= avl_find_element(&devices
, name
, dev
, avl
);
416 return device_create_default(name
, create
> 1);
420 device_delete(struct device
*dev
)
425 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
426 avl_delete(&devices
, &dev
->avl
);
430 void device_cleanup(struct device
*dev
)
432 struct device_user
*dep
, *tmp
;
434 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
435 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
439 dep
->cb(dep
, DEV_EVENT_REMOVE
);
446 static void __device_set_present(struct device
*dev
, bool state
)
448 if (dev
->present
== state
)
451 dev
->present
= state
;
452 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
455 void device_set_present(struct device
*dev
, bool state
)
457 if (dev
->sys_present
== state
)
460 dev
->sys_present
= state
;
461 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
463 if (state
&& dev
->disabled
)
466 __device_set_present(dev
, state
);
470 device_set_disabled(struct device
*dev
, bool value
)
472 dev
->disabled
= value
;
473 if (dev
->sys_present
)
474 __device_set_present(dev
, !value
);
477 void device_add_user(struct device_user
*dep
, struct device
*dev
)
480 device_remove_user(dep
);
486 list_add_tail(&dep
->list
, &dev
->users
);
487 if (dep
->cb
&& dev
->present
) {
488 dep
->cb(dep
, DEV_EVENT_ADD
);
490 dep
->cb(dep
, DEV_EVENT_UP
);
495 device_free(struct device
*dev
)
500 dev
->type
->free(dev
);
505 __device_free_unused(struct device
*dev
)
507 if (!list_empty(&dev
->users
) || dev
->current_config
|| __devlock
)
513 void device_remove_user(struct device_user
*dep
)
515 struct device
*dev
= dep
->dev
;
520 dep
->hotplug
= false;
524 list_del(&dep
->list
);
526 __device_free_unused(dev
);
530 device_free_unused(struct device
*dev
)
535 return __device_free_unused(dev
);
537 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
538 __device_free_unused(dev
);
542 device_init_pending(void)
544 struct device
*dev
, *tmp
;
546 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
547 if (!dev
->config_pending
)
550 dev
->type
->config_init(dev
);
551 dev
->config_pending
= false;
555 static enum dev_change_type
556 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
558 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
559 const struct config_param_list
*cfg
= dev
->type
->config_params
;
561 if (config_check_equal(dev
->config
, attr
, cfg
))
562 return DEV_CONFIG_NO_CHANGE
;
564 if (cfg
== &device_attr_list
) {
565 memset(tb
, 0, sizeof(tb
));
568 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
569 blob_data(attr
), blob_len(attr
));
571 device_init_settings(dev
, tb
);
572 return DEV_CONFIG_RESTART
;
574 return DEV_CONFIG_RECREATE
;
578 device_set_config(struct device
*dev
, const struct device_type
*type
,
579 struct blob_attr
*attr
)
581 if (type
!= dev
->type
)
582 return DEV_CONFIG_RECREATE
;
584 if (dev
->type
->reload
)
585 return dev
->type
->reload(dev
, attr
);
587 return device_reload_config(dev
, attr
);
591 device_replace(struct device
*dev
, struct device
*odev
)
593 struct device_user
*dep
, *tmp
;
594 bool present
= odev
->present
;
597 device_set_present(odev
, false);
599 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
601 list_move_tail(&dep
->list
, &dev
->users
);
607 device_set_present(dev
, true);
611 device_reset_config(void)
615 avl_for_each_element(&devices
, dev
, avl
)
616 dev
->current_config
= false;
620 device_reset_old(void)
622 struct device
*dev
, *tmp
, *ndev
;
624 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
625 if (dev
->current_config
|| dev
->default_config
)
628 if (dev
->type
!= &simple_device_type
)
631 ndev
= device_create_default(dev
->ifname
, dev
->external
);
632 device_replace(ndev
, dev
);
637 device_create(const char *name
, const struct device_type
*type
,
638 struct blob_attr
*config
)
640 struct device
*odev
= NULL
, *dev
;
641 enum dev_change_type change
;
643 config
= config_memdup(config
);
647 odev
= device_get(name
, false);
649 odev
->current_config
= true;
650 change
= device_set_config(odev
, type
, config
);
652 case DEV_CONFIG_RESTART
:
653 case DEV_CONFIG_APPLIED
:
654 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
656 odev
->config
= config
;
657 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
658 device_set_present(odev
, false);
659 device_set_present(odev
, true);
662 case DEV_CONFIG_NO_CHANGE
:
663 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
666 case DEV_CONFIG_RECREATE
:
667 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
672 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
674 dev
= type
->create(name
, config
);
678 dev
->current_config
= true;
679 dev
->config
= config
;
681 device_replace(dev
, odev
);
683 if (!config_init
&& dev
->config_pending
)
684 type
->config_init(dev
);
690 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
692 struct device_settings st
;
696 avl_for_each_element(&devices
, dev
, avl
) {
699 c
= blobmsg_open_table(b
, dev
->ifname
);
700 device_dump_status(b
, dev
);
701 blobmsg_close_table(b
, c
);
710 blobmsg_add_string(b
, "type", dev
->type
->name
);
711 blobmsg_add_u8(b
, "up", !!dev
->active
);
712 if (dev
->type
->dump_info
)
713 dev
->type
->dump_info(dev
, b
);
715 system_if_dump_info(dev
, b
);
718 device_merge_settings(dev
, &st
);
719 if (st
.flags
& DEV_OPT_MTU
)
720 blobmsg_add_u32(b
, "mtu", st
.mtu
);
721 if (st
.flags
& DEV_OPT_MACADDR
)
722 blobmsg_add_string(b
, "macaddr", ether_ntoa((struct ether_addr
*) st
.macaddr
));
723 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
724 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
727 s
= blobmsg_open_table(b
, "statistics");
728 if (dev
->type
->dump_stats
)
729 dev
->type
->dump_stats(dev
, b
);
731 system_if_dump_stats(dev
, b
);
732 blobmsg_close_table(b
, s
);