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
},
41 [DEV_ATTR_PROMISC
] = { .name
= "promisc", .type
= BLOBMSG_TYPE_BOOL
},
42 [DEV_ATTR_RPFILTER
] = { .name
= "rpfilter", .type
= BLOBMSG_TYPE_STRING
},
43 [DEV_ATTR_ACCEPTLOCAL
] = { .name
= "acceptlocal", .type
= BLOBMSG_TYPE_BOOL
},
44 [DEV_ATTR_IGMPVERSION
] = { .name
= "igmpversion", .type
= BLOBMSG_TYPE_INT32
},
47 const struct uci_blob_param_list device_attr_list
= {
48 .n_params
= __DEV_ATTR_MAX
,
52 static int __devlock
= 0;
54 void device_lock(void)
59 void device_unlock(void)
63 device_free_unused(NULL
);
66 static int set_device_state(struct device
*dev
, bool state
)
69 /* Set ifindex for all devices being enabled so a valid */
70 /* ifindex is in place avoiding possible race conditions */
71 device_set_ifindex(dev
, system_if_resolve(dev
));
88 simple_device_set_state(struct device
*dev
, bool state
)
93 pdev
= dev
->parent
.dev
;
95 pdev
= system_if_get_parent(dev
);
97 device_add_user(&dev
->parent
, pdev
);
102 ret
= device_claim(&dev
->parent
);
104 device_release(&dev
->parent
);
109 return set_device_state(dev
, state
);
112 static struct device
*
113 simple_device_create(const char *name
, struct blob_attr
*attr
)
115 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
116 struct device
*dev
= NULL
;
118 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
119 dev
= device_get(name
, true);
123 dev
->set_state
= simple_device_set_state
;
124 device_init_settings(dev
, tb
);
129 static void simple_device_free(struct device
*dev
)
132 device_remove_user(&dev
->parent
);
136 const struct device_type simple_device_type
= {
137 .name
= "Network device",
138 .config_params
= &device_attr_list
,
140 .create
= simple_device_create
,
141 .check_state
= system_if_check
,
142 .free
= simple_device_free
,
146 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
148 struct device_settings
*os
= &dev
->orig_settings
;
149 struct device_settings
*s
= &dev
->settings
;
151 memset(n
, 0, sizeof(*n
));
152 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
153 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
154 s
->txqueuelen
: os
->txqueuelen
;
156 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
158 n
->ipv6
= s
->flags
& DEV_OPT_IPV6
? s
->ipv6
: os
->ipv6
;
159 n
->promisc
= s
->flags
& DEV_OPT_PROMISC
? s
->promisc
: os
->promisc
;
160 n
->rpfilter
= s
->flags
& DEV_OPT_RPFILTER
? s
->rpfilter
: os
->rpfilter
;
161 n
->acceptlocal
= s
->flags
& DEV_OPT_ACCEPTLOCAL
? s
->acceptlocal
: os
->acceptlocal
;
162 n
->igmpversion
= s
->flags
& DEV_OPT_IGMPVERSION
? s
->igmpversion
: os
->igmpversion
;
163 n
->flags
= s
->flags
| os
->flags
;
167 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
169 struct device_settings
*s
= &dev
->settings
;
170 struct blob_attr
*cur
;
171 struct ether_addr
*ea
;
172 bool disabled
= false;
175 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
176 disabled
= !blobmsg_get_bool(cur
);
178 if ((cur
= tb
[DEV_ATTR_MTU
])) {
179 s
->mtu
= blobmsg_get_u32(cur
);
180 s
->flags
|= DEV_OPT_MTU
;
183 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
184 s
->txqueuelen
= blobmsg_get_u32(cur
);
185 s
->flags
|= DEV_OPT_TXQUEUELEN
;
188 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
189 ea
= ether_aton(blobmsg_data(cur
));
191 memcpy(s
->macaddr
, ea
, 6);
192 s
->flags
|= DEV_OPT_MACADDR
;
196 if ((cur
= tb
[DEV_ATTR_IPV6
])) {
197 s
->ipv6
= blobmsg_get_bool(cur
);
198 s
->flags
|= DEV_OPT_IPV6
;
201 if ((cur
= tb
[DEV_ATTR_PROMISC
])) {
202 s
->promisc
= blobmsg_get_bool(cur
);
203 s
->flags
|= DEV_OPT_PROMISC
;
206 if ((cur
= tb
[DEV_ATTR_RPFILTER
])) {
207 if (system_resolve_rpfilter(blobmsg_data(cur
), &s
->rpfilter
))
208 s
->flags
|= DEV_OPT_RPFILTER
;
210 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur
));
213 if ((cur
= tb
[DEV_ATTR_ACCEPTLOCAL
])) {
214 s
->acceptlocal
= blobmsg_get_bool(cur
);
215 s
->flags
|= DEV_OPT_ACCEPTLOCAL
;
218 if ((cur
= tb
[DEV_ATTR_IGMPVERSION
])) {
219 if (system_resolve_igmpversion(blobmsg_get_u32(cur
), &s
->igmpversion
))
220 s
->flags
|= DEV_OPT_IGMPVERSION
;
222 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur
));
225 device_set_disabled(dev
, disabled
);
228 static void __init
dev_init(void)
230 avl_init(&devices
, avl_strcmp
, true, NULL
);
233 static int device_broadcast_cb(void *ctx
, struct safe_list
*list
)
235 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
238 /* device might have been removed by an earlier callback */
247 void device_broadcast_event(struct device
*dev
, enum device_event ev
)
251 safe_list_for_each(&dev
->aliases
, device_broadcast_cb
, &dev_ev
);
252 safe_list_for_each(&dev
->users
, device_broadcast_cb
, &dev_ev
);
255 int device_claim(struct device_user
*dep
)
257 struct device
*dev
= dep
->dev
;
264 D(DEVICE
, "Claim %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
265 if (++dev
->active
!= 1)
268 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
269 ret
= dev
->set_state(dev
, true);
271 device_broadcast_event(dev
, DEV_EVENT_UP
);
273 D(DEVICE
, "claim %s %s failed: %d\n", dev
->type
->name
, dev
->ifname
, ret
);
275 dep
->claimed
= false;
281 void device_release(struct device_user
*dep
)
283 struct device
*dev
= dep
->dev
;
288 dep
->claimed
= false;
290 D(DEVICE
, "Release %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
291 assert(dev
->active
>= 0);
296 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
298 dev
->set_state(dev
, false);
299 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
302 int device_check_state(struct device
*dev
)
304 if (!dev
->type
->check_state
)
305 return simple_device_type
.check_state(dev
);
307 return dev
->type
->check_state(dev
);
310 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
316 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
318 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
319 INIT_SAFE_LIST(&dev
->users
);
320 INIT_SAFE_LIST(&dev
->aliases
);
324 dev
->set_state
= set_device_state
;
327 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
331 device_init_virtual(dev
, type
, ifname
);
333 dev
->avl
.key
= dev
->ifname
;
335 ret
= avl_insert(&devices
, &dev
->avl
);
339 system_if_clear_state(dev
);
340 device_check_state(dev
);
345 static struct device
*
346 device_create_default(const char *name
, bool external
)
350 if (!external
&& system_if_force_external(name
))
353 D(DEVICE
, "Create simple device '%s'\n", name
);
354 dev
= calloc(1, sizeof(*dev
));
355 dev
->external
= external
;
356 dev
->set_state
= simple_device_set_state
;
357 device_init(dev
, &simple_device_type
, name
);
358 dev
->default_config
= true;
363 device_get(const char *name
, int create
)
367 if (strchr(name
, '.'))
368 return get_vlan_device_chain(name
, create
);
371 return device_alias_get(name
+ 1);
373 dev
= avl_find_element(&devices
, name
, dev
, avl
);
375 if (create
> 1 && !dev
->external
) {
376 dev
->external
= true;
377 device_set_present(dev
, true);
385 return device_create_default(name
, create
> 1);
389 device_delete(struct device
*dev
)
394 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
395 avl_delete(&devices
, &dev
->avl
);
399 static int device_cleanup_cb(void *ctx
, struct safe_list
*list
)
401 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
403 dep
->cb(dep
, DEV_EVENT_REMOVE
);
409 void device_cleanup(struct device
*dev
)
411 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
412 safe_list_for_each(&dev
->users
, device_cleanup_cb
, NULL
);
413 safe_list_for_each(&dev
->aliases
, device_cleanup_cb
, NULL
);
417 static void __device_set_present(struct device
*dev
, bool state
)
419 if (dev
->present
== state
)
422 dev
->present
= state
;
423 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
427 device_refresh_present(struct device
*dev
)
429 bool state
= dev
->sys_present
;
431 if (dev
->disabled
|| dev
->deferred
)
434 __device_set_present(dev
, state
);
437 void device_set_present(struct device
*dev
, bool state
)
439 if (dev
->sys_present
== state
)
442 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
443 dev
->sys_present
= state
;
444 device_refresh_present(dev
);
447 void device_set_link(struct device
*dev
, bool state
)
449 if (dev
->link_active
== state
)
452 netifd_log_message(L_NOTICE
, "%s '%s' link is %s\n", dev
->type
->name
, dev
->ifname
, state
? "up" : "down" );
454 dev
->link_active
= state
;
455 device_broadcast_event(dev
, state
? DEV_EVENT_LINK_UP
: DEV_EVENT_LINK_DOWN
);
458 void device_set_ifindex(struct device
*dev
, int ifindex
)
460 if (dev
->ifindex
== ifindex
)
463 dev
->ifindex
= ifindex
;
464 device_broadcast_event(dev
, DEV_EVENT_UPDATE_IFINDEX
);
467 static int device_refcount(struct device
*dev
)
469 struct list_head
*list
;
472 list_for_each(list
, &dev
->users
.list
)
475 list_for_each(list
, &dev
->aliases
.list
)
481 void device_add_user(struct device_user
*dep
, struct device
*dev
)
483 struct safe_list
*head
;
489 device_remove_user(dep
);
497 head
= &dev
->aliases
;
501 safe_list_add(&dep
->list
, head
);
502 D(DEVICE
, "Add user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
504 if (dep
->cb
&& dev
->present
) {
505 dep
->cb(dep
, DEV_EVENT_ADD
);
507 dep
->cb(dep
, DEV_EVENT_UP
);
509 if (dev
->link_active
)
510 dep
->cb(dep
, DEV_EVENT_LINK_UP
);
515 device_free(struct device
*dev
)
520 dev
->type
->free(dev
);
525 __device_free_unused(struct device
*dev
)
527 if (!safe_list_empty(&dev
->users
) ||
528 !safe_list_empty(&dev
->aliases
) ||
529 dev
->current_config
|| __devlock
)
535 void device_remove_user(struct device_user
*dep
)
537 struct device
*dev
= dep
->dev
;
542 dep
->hotplug
= false;
546 safe_list_del(&dep
->list
);
548 D(DEVICE
, "Remove user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
549 __device_free_unused(dev
);
553 device_free_unused(struct device
*dev
)
558 return __device_free_unused(dev
);
560 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
561 __device_free_unused(dev
);
565 device_init_pending(void)
567 struct device
*dev
, *tmp
;
569 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
570 if (!dev
->config_pending
)
573 dev
->type
->config_init(dev
);
574 dev
->config_pending
= false;
578 static enum dev_change_type
579 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
581 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
582 const struct uci_blob_param_list
*cfg
= dev
->type
->config_params
;
584 if (uci_blob_check_equal(dev
->config
, attr
, cfg
))
585 return DEV_CONFIG_NO_CHANGE
;
587 if (cfg
== &device_attr_list
) {
588 memset(tb
, 0, sizeof(tb
));
591 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
592 blob_data(attr
), blob_len(attr
));
594 device_init_settings(dev
, tb
);
595 return DEV_CONFIG_RESTART
;
597 return DEV_CONFIG_RECREATE
;
601 device_set_config(struct device
*dev
, const struct device_type
*type
,
602 struct blob_attr
*attr
)
604 if (type
!= dev
->type
)
605 return DEV_CONFIG_RECREATE
;
607 if (dev
->type
->reload
)
608 return dev
->type
->reload(dev
, attr
);
610 return device_reload_config(dev
, attr
);
614 device_replace(struct device
*dev
, struct device
*odev
)
616 struct device_user
*dep
, *tmp
;
617 bool present
= odev
->present
;
620 device_set_present(odev
, false);
622 list_for_each_entry_safe(dep
, tmp
, &odev
->users
.list
, list
.list
) {
624 safe_list_del(&dep
->list
);
625 safe_list_add(&dep
->list
, &dev
->users
);
631 device_set_present(dev
, true);
635 device_reset_config(void)
639 avl_for_each_element(&devices
, dev
, avl
)
640 dev
->current_config
= false;
644 device_reset_old(void)
646 struct device
*dev
, *tmp
, *ndev
;
648 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
649 if (dev
->current_config
|| dev
->default_config
)
652 if (dev
->type
!= &simple_device_type
)
655 ndev
= device_create_default(dev
->ifname
, dev
->external
);
656 device_replace(ndev
, dev
);
661 device_create(const char *name
, const struct device_type
*type
,
662 struct blob_attr
*config
)
664 struct device
*odev
= NULL
, *dev
;
665 enum dev_change_type change
;
667 config
= blob_memdup(config
);
671 odev
= device_get(name
, false);
673 odev
->current_config
= true;
674 change
= device_set_config(odev
, type
, config
);
675 if (odev
->external
) {
676 system_if_apply_settings(odev
, &odev
->settings
, odev
->settings
.flags
);
677 change
= DEV_CONFIG_APPLIED
;
680 case DEV_CONFIG_RESTART
:
681 case DEV_CONFIG_APPLIED
:
682 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
684 odev
->config
= config
;
685 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
686 device_set_present(odev
, false);
687 device_set_present(odev
, true);
690 case DEV_CONFIG_NO_CHANGE
:
691 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
694 case DEV_CONFIG_RECREATE
:
695 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
700 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
702 dev
= type
->create(name
, config
);
706 dev
->current_config
= true;
707 dev
->config
= config
;
709 device_replace(dev
, odev
);
711 if (!config_init
&& dev
->config_pending
)
712 type
->config_init(dev
);
718 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
720 struct device_settings st
;
724 avl_for_each_element(&devices
, dev
, avl
) {
727 c
= blobmsg_open_table(b
, dev
->ifname
);
728 device_dump_status(b
, dev
);
729 blobmsg_close_table(b
, c
);
735 blobmsg_add_u8(b
, "external", dev
->external
);
736 blobmsg_add_u8(b
, "present", dev
->present
);
737 blobmsg_add_string(b
, "type", dev
->type
->name
);
742 blobmsg_add_u8(b
, "up", !!dev
->active
);
743 blobmsg_add_u8(b
, "carrier", !!dev
->link_active
);
745 if (dev
->type
->dump_info
)
746 dev
->type
->dump_info(dev
, b
);
748 system_if_dump_info(dev
, b
);
751 device_merge_settings(dev
, &st
);
752 if (st
.flags
& DEV_OPT_MTU
)
753 blobmsg_add_u32(b
, "mtu", st
.mtu
);
754 if (st
.flags
& DEV_OPT_MACADDR
)
755 blobmsg_add_string(b
, "macaddr", format_macaddr(st
.macaddr
));
756 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
757 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
758 if (st
.flags
& DEV_OPT_IPV6
)
759 blobmsg_add_u8(b
, "ipv6", st
.ipv6
);
760 if (st
.flags
& DEV_OPT_PROMISC
)
761 blobmsg_add_u8(b
, "promisc", st
.promisc
);
762 if (st
.flags
& DEV_OPT_RPFILTER
)
763 blobmsg_add_u32(b
, "rpfilter", st
.rpfilter
);
764 if (st
.flags
& DEV_OPT_ACCEPTLOCAL
)
765 blobmsg_add_u8(b
, "acceptlocal", st
.acceptlocal
);
766 if (st
.flags
& DEV_OPT_IGMPVERSION
)
767 blobmsg_add_u32(b
, "igmpversion", st
.igmpversion
);
770 s
= blobmsg_open_table(b
, "statistics");
771 if (dev
->type
->dump_stats
)
772 dev
->type
->dump_stats(dev
, b
);
774 system_if_dump_stats(dev
, b
);
775 blobmsg_close_table(b
, s
);