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
;
33 static const struct blobmsg_policy dev_attrs
[__DEV_ATTR_MAX
] = {
34 [DEV_ATTR_TYPE
] = { .name
= "type", .type
= BLOBMSG_TYPE_STRING
},
35 [DEV_ATTR_IFNAME
] = { .name
= "ifname", .type
= BLOBMSG_TYPE_ARRAY
},
36 [DEV_ATTR_MTU
] = { .name
= "mtu", .type
= BLOBMSG_TYPE_INT32
},
37 [DEV_ATTR_MACADDR
] = { .name
= "macaddr", .type
= BLOBMSG_TYPE_STRING
},
38 [DEV_ATTR_TXQUEUELEN
] = { .name
= "txqueuelen", .type
= BLOBMSG_TYPE_INT32
},
39 [DEV_ATTR_ENABLED
] = { .name
= "enabled", .type
= BLOBMSG_TYPE_BOOL
},
40 [DEV_ATTR_IPV6
] = { .name
= "ipv6", .type
= BLOBMSG_TYPE_BOOL
},
43 const struct uci_blob_param_list device_attr_list
= {
44 .n_params
= __DEV_ATTR_MAX
,
48 static int __devlock
= 0;
50 void device_lock(void)
55 void device_unlock(void)
59 device_free_unused(NULL
);
62 static int set_device_state(struct device
*dev
, bool state
)
76 simple_device_set_state(struct device
*dev
, bool state
)
81 pdev
= dev
->parent
.dev
;
83 pdev
= system_if_get_parent(dev
);
85 device_add_user(&dev
->parent
, pdev
);
90 ret
= device_claim(&dev
->parent
);
92 device_release(&dev
->parent
);
97 return set_device_state(dev
, state
);
100 static struct device
*
101 simple_device_create(const char *name
, struct blob_attr
*attr
)
103 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
104 struct device
*dev
= NULL
;
106 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
107 dev
= device_get(name
, true);
111 dev
->set_state
= simple_device_set_state
;
112 device_init_settings(dev
, tb
);
117 static void simple_device_free(struct device
*dev
)
120 device_remove_user(&dev
->parent
);
124 const struct device_type simple_device_type
= {
125 .name
= "Network device",
126 .config_params
= &device_attr_list
,
128 .create
= simple_device_create
,
129 .check_state
= system_if_check
,
130 .free
= simple_device_free
,
134 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
136 struct device_settings
*os
= &dev
->orig_settings
;
137 struct device_settings
*s
= &dev
->settings
;
139 memset(n
, 0, sizeof(*n
));
140 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
141 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
142 s
->txqueuelen
: os
->txqueuelen
;
144 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
146 n
->ipv6
= s
->flags
& DEV_OPT_IPV6
? s
->ipv6
: os
->ipv6
;
147 n
->flags
= s
->flags
| os
->flags
;
151 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
153 struct device_settings
*s
= &dev
->settings
;
154 struct blob_attr
*cur
;
155 struct ether_addr
*ea
;
156 bool disabled
= false;
159 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
160 disabled
= !blobmsg_get_bool(cur
);
162 if ((cur
= tb
[DEV_ATTR_MTU
])) {
163 s
->mtu
= blobmsg_get_u32(cur
);
164 s
->flags
|= DEV_OPT_MTU
;
167 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
168 s
->txqueuelen
= blobmsg_get_u32(cur
);
169 s
->flags
|= DEV_OPT_TXQUEUELEN
;
172 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
173 ea
= ether_aton(blobmsg_data(cur
));
175 memcpy(s
->macaddr
, ea
, 6);
176 s
->flags
|= DEV_OPT_MACADDR
;
180 if ((cur
= tb
[DEV_ATTR_IPV6
])) {
181 s
->ipv6
= blobmsg_get_bool(cur
);
182 s
->flags
|= DEV_OPT_IPV6
;
185 device_set_disabled(dev
, disabled
);
188 static void __init
dev_init(void)
190 avl_init(&devices
, avl_strcmp
, true, NULL
);
193 static int device_broadcast_cb(void *ctx
, struct safe_list
*list
)
195 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
198 /* device might have been removed by an earlier callback */
207 void device_broadcast_event(struct device
*dev
, enum device_event ev
)
211 safe_list_for_each(&dev
->aliases
, device_broadcast_cb
, &dev_ev
);
212 safe_list_for_each(&dev
->users
, device_broadcast_cb
, &dev_ev
);
215 int device_claim(struct device_user
*dep
)
217 struct device
*dev
= dep
->dev
;
224 D(DEVICE
, "Claim %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
225 if (++dev
->active
!= 1)
228 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
229 ret
= dev
->set_state(dev
, true);
231 device_broadcast_event(dev
, DEV_EVENT_UP
);
233 D(DEVICE
, "claim %s %s failed: %d\n", dev
->type
->name
, dev
->ifname
, ret
);
235 dep
->claimed
= false;
241 void device_release(struct device_user
*dep
)
243 struct device
*dev
= dep
->dev
;
248 dep
->claimed
= false;
250 D(DEVICE
, "Release %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
251 assert(dev
->active
>= 0);
256 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
258 dev
->set_state(dev
, false);
259 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
262 int device_check_state(struct device
*dev
)
264 if (!dev
->type
->check_state
)
265 return simple_device_type
.check_state(dev
);
267 return dev
->type
->check_state(dev
);
270 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
276 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
278 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
279 INIT_SAFE_LIST(&dev
->users
);
280 INIT_SAFE_LIST(&dev
->aliases
);
284 dev
->set_state
= set_device_state
;
287 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
291 device_init_virtual(dev
, type
, ifname
);
293 dev
->avl
.key
= dev
->ifname
;
295 ret
= avl_insert(&devices
, &dev
->avl
);
299 system_if_clear_state(dev
);
300 device_check_state(dev
);
305 static struct device
*
306 device_create_default(const char *name
, bool external
)
310 if (!external
&& system_if_force_external(name
))
313 D(DEVICE
, "Create simple device '%s'\n", name
);
314 dev
= calloc(1, sizeof(*dev
));
315 dev
->external
= external
;
316 dev
->set_state
= simple_device_set_state
;
317 device_init(dev
, &simple_device_type
, name
);
318 dev
->default_config
= true;
323 device_get(const char *name
, int create
)
327 if (strchr(name
, '.'))
328 return get_vlan_device_chain(name
, create
);
331 return device_alias_get(name
+ 1);
333 dev
= avl_find_element(&devices
, name
, dev
, avl
);
335 if (create
> 1 && !dev
->external
) {
336 dev
->external
= true;
337 device_set_present(dev
, true);
345 return device_create_default(name
, create
> 1);
349 device_delete(struct device
*dev
)
354 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
355 avl_delete(&devices
, &dev
->avl
);
359 static int device_cleanup_cb(void *ctx
, struct safe_list
*list
)
361 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
363 dep
->cb(dep
, DEV_EVENT_REMOVE
);
369 void device_cleanup(struct device
*dev
)
371 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
372 safe_list_for_each(&dev
->users
, device_cleanup_cb
, NULL
);
373 safe_list_for_each(&dev
->aliases
, device_cleanup_cb
, NULL
);
377 static void __device_set_present(struct device
*dev
, bool state
)
379 if (dev
->present
== state
)
382 dev
->present
= state
;
383 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
387 device_refresh_present(struct device
*dev
)
389 bool state
= dev
->sys_present
;
391 if (dev
->disabled
|| dev
->deferred
)
394 __device_set_present(dev
, state
);
397 void device_set_present(struct device
*dev
, bool state
)
399 if (dev
->sys_present
== state
)
402 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
403 dev
->sys_present
= state
;
404 device_refresh_present(dev
);
407 void device_set_link(struct device
*dev
, bool state
)
409 if (dev
->link_active
== state
)
412 netifd_log_message(L_NOTICE
, "%s '%s' link is %s\n", dev
->type
->name
, dev
->ifname
, state
? "up" : "down" );
414 dev
->link_active
= state
;
415 device_broadcast_event(dev
, state
? DEV_EVENT_LINK_UP
: DEV_EVENT_LINK_DOWN
);
418 void device_set_ifindex(struct device
*dev
, int ifindex
)
420 if (dev
->ifindex
== ifindex
)
423 dev
->ifindex
= ifindex
;
424 device_broadcast_event(dev
, DEV_EVENT_UPDATE_IFINDEX
);
427 static int device_refcount(struct device
*dev
)
429 struct list_head
*list
;
432 list_for_each(list
, &dev
->users
.list
)
435 list_for_each(list
, &dev
->aliases
.list
)
441 void device_add_user(struct device_user
*dep
, struct device
*dev
)
443 struct safe_list
*head
;
449 device_remove_user(dep
);
457 head
= &dev
->aliases
;
461 safe_list_add(&dep
->list
, head
);
462 D(DEVICE
, "Add user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
464 if (dep
->cb
&& dev
->present
) {
465 dep
->cb(dep
, DEV_EVENT_ADD
);
467 dep
->cb(dep
, DEV_EVENT_UP
);
469 if (dev
->link_active
)
470 dep
->cb(dep
, DEV_EVENT_LINK_UP
);
475 device_free(struct device
*dev
)
480 dev
->type
->free(dev
);
485 __device_free_unused(struct device
*dev
)
487 if (!safe_list_empty(&dev
->users
) ||
488 !safe_list_empty(&dev
->aliases
) ||
489 dev
->current_config
|| __devlock
)
495 void device_remove_user(struct device_user
*dep
)
497 struct device
*dev
= dep
->dev
;
502 dep
->hotplug
= false;
506 safe_list_del(&dep
->list
);
508 D(DEVICE
, "Remove user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
509 __device_free_unused(dev
);
513 device_free_unused(struct device
*dev
)
518 return __device_free_unused(dev
);
520 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
521 __device_free_unused(dev
);
525 device_init_pending(void)
527 struct device
*dev
, *tmp
;
529 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
530 if (!dev
->config_pending
)
533 dev
->type
->config_init(dev
);
534 dev
->config_pending
= false;
538 static enum dev_change_type
539 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
541 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
542 const struct uci_blob_param_list
*cfg
= dev
->type
->config_params
;
544 if (uci_blob_check_equal(dev
->config
, attr
, cfg
))
545 return DEV_CONFIG_NO_CHANGE
;
547 if (cfg
== &device_attr_list
) {
548 memset(tb
, 0, sizeof(tb
));
551 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
552 blob_data(attr
), blob_len(attr
));
554 device_init_settings(dev
, tb
);
555 return DEV_CONFIG_RESTART
;
557 return DEV_CONFIG_RECREATE
;
561 device_set_config(struct device
*dev
, const struct device_type
*type
,
562 struct blob_attr
*attr
)
564 if (type
!= dev
->type
)
565 return DEV_CONFIG_RECREATE
;
567 if (dev
->type
->reload
)
568 return dev
->type
->reload(dev
, attr
);
570 return device_reload_config(dev
, attr
);
574 device_replace(struct device
*dev
, struct device
*odev
)
576 struct device_user
*dep
, *tmp
;
577 bool present
= odev
->present
;
580 device_set_present(odev
, false);
582 list_for_each_entry_safe(dep
, tmp
, &odev
->users
.list
, list
.list
) {
584 safe_list_del(&dep
->list
);
585 safe_list_add(&dep
->list
, &dev
->users
);
591 device_set_present(dev
, true);
595 device_reset_config(void)
599 avl_for_each_element(&devices
, dev
, avl
)
600 dev
->current_config
= false;
604 device_reset_old(void)
606 struct device
*dev
, *tmp
, *ndev
;
608 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
609 if (dev
->current_config
|| dev
->default_config
)
612 if (dev
->type
!= &simple_device_type
)
615 ndev
= device_create_default(dev
->ifname
, dev
->external
);
616 device_replace(ndev
, dev
);
621 device_create(const char *name
, const struct device_type
*type
,
622 struct blob_attr
*config
)
624 struct device
*odev
= NULL
, *dev
;
625 enum dev_change_type change
;
627 config
= blob_memdup(config
);
631 odev
= device_get(name
, false);
633 odev
->current_config
= true;
634 change
= device_set_config(odev
, type
, config
);
635 if (odev
->external
) {
636 system_if_apply_settings(odev
, &odev
->settings
, odev
->settings
.flags
);
637 change
= DEV_CONFIG_APPLIED
;
640 case DEV_CONFIG_RESTART
:
641 case DEV_CONFIG_APPLIED
:
642 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
644 odev
->config
= config
;
645 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
646 device_set_present(odev
, false);
647 device_set_present(odev
, true);
650 case DEV_CONFIG_NO_CHANGE
:
651 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
654 case DEV_CONFIG_RECREATE
:
655 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
660 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
662 dev
= type
->create(name
, config
);
666 dev
->current_config
= true;
667 dev
->config
= config
;
669 device_replace(dev
, odev
);
671 if (!config_init
&& dev
->config_pending
)
672 type
->config_init(dev
);
678 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
680 struct device_settings st
;
684 avl_for_each_element(&devices
, dev
, avl
) {
687 c
= blobmsg_open_table(b
, dev
->ifname
);
688 device_dump_status(b
, dev
);
689 blobmsg_close_table(b
, c
);
695 blobmsg_add_u8(b
, "external", dev
->external
);
696 blobmsg_add_u8(b
, "present", dev
->present
);
697 blobmsg_add_string(b
, "type", dev
->type
->name
);
702 blobmsg_add_u8(b
, "up", !!dev
->active
);
703 blobmsg_add_u8(b
, "carrier", !!dev
->link_active
);
705 if (dev
->type
->dump_info
)
706 dev
->type
->dump_info(dev
, b
);
708 system_if_dump_info(dev
, b
);
711 device_merge_settings(dev
, &st
);
712 if (st
.flags
& DEV_OPT_MTU
)
713 blobmsg_add_u32(b
, "mtu", st
.mtu
);
714 if (st
.flags
& DEV_OPT_MACADDR
)
715 blobmsg_add_string(b
, "macaddr", format_macaddr(st
.macaddr
));
716 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
717 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
718 if (st
.flags
& DEV_OPT_IPV6
)
719 blobmsg_add_u8(b
, "ipv6", st
.ipv6
);
722 s
= blobmsg_open_table(b
, "statistics");
723 if (dev
->type
->dump_stats
)
724 dev
->type
->dump_stats(dev
, b
);
726 system_if_dump_stats(dev
, b
);
727 blobmsg_close_table(b
, s
);