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
},
45 [DEV_ATTR_MLDVERSION
] = { .name
= "mldversion", .type
= BLOBMSG_TYPE_INT32
},
48 const struct uci_blob_param_list device_attr_list
= {
49 .n_params
= __DEV_ATTR_MAX
,
53 static int __devlock
= 0;
55 void device_lock(void)
60 void device_unlock(void)
64 device_free_unused(NULL
);
67 static int set_device_state(struct device
*dev
, bool state
)
70 /* Set ifindex for all devices being enabled so a valid */
71 /* ifindex is in place avoiding possible race conditions */
72 device_set_ifindex(dev
, system_if_resolve(dev
));
89 simple_device_set_state(struct device
*dev
, bool state
)
94 pdev
= dev
->parent
.dev
;
96 pdev
= system_if_get_parent(dev
);
98 device_add_user(&dev
->parent
, pdev
);
103 ret
= device_claim(&dev
->parent
);
105 device_release(&dev
->parent
);
110 return set_device_state(dev
, state
);
113 static struct device
*
114 simple_device_create(const char *name
, struct blob_attr
*attr
)
116 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
117 struct device
*dev
= NULL
;
119 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
120 dev
= device_get(name
, true);
124 dev
->set_state
= simple_device_set_state
;
125 device_init_settings(dev
, tb
);
130 static void simple_device_free(struct device
*dev
)
133 device_remove_user(&dev
->parent
);
137 const struct device_type simple_device_type
= {
138 .name
= "Network device",
139 .config_params
= &device_attr_list
,
141 .create
= simple_device_create
,
142 .check_state
= system_if_check
,
143 .free
= simple_device_free
,
147 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
149 struct device_settings
*os
= &dev
->orig_settings
;
150 struct device_settings
*s
= &dev
->settings
;
152 memset(n
, 0, sizeof(*n
));
153 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
154 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
155 s
->txqueuelen
: os
->txqueuelen
;
157 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
159 n
->ipv6
= s
->flags
& DEV_OPT_IPV6
? s
->ipv6
: os
->ipv6
;
160 n
->promisc
= s
->flags
& DEV_OPT_PROMISC
? s
->promisc
: os
->promisc
;
161 n
->rpfilter
= s
->flags
& DEV_OPT_RPFILTER
? s
->rpfilter
: os
->rpfilter
;
162 n
->acceptlocal
= s
->flags
& DEV_OPT_ACCEPTLOCAL
? s
->acceptlocal
: os
->acceptlocal
;
163 n
->igmpversion
= s
->flags
& DEV_OPT_IGMPVERSION
? s
->igmpversion
: os
->igmpversion
;
164 n
->mldversion
= s
->flags
& DEV_OPT_MLDVERSION
? s
->mldversion
: os
->mldversion
;
165 n
->flags
= s
->flags
| os
->flags
;
169 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
171 struct device_settings
*s
= &dev
->settings
;
172 struct blob_attr
*cur
;
173 struct ether_addr
*ea
;
174 bool disabled
= false;
177 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
178 disabled
= !blobmsg_get_bool(cur
);
180 if ((cur
= tb
[DEV_ATTR_MTU
])) {
181 s
->mtu
= blobmsg_get_u32(cur
);
182 s
->flags
|= DEV_OPT_MTU
;
185 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
186 s
->txqueuelen
= blobmsg_get_u32(cur
);
187 s
->flags
|= DEV_OPT_TXQUEUELEN
;
190 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
191 ea
= ether_aton(blobmsg_data(cur
));
193 memcpy(s
->macaddr
, ea
, 6);
194 s
->flags
|= DEV_OPT_MACADDR
;
198 if ((cur
= tb
[DEV_ATTR_IPV6
])) {
199 s
->ipv6
= blobmsg_get_bool(cur
);
200 s
->flags
|= DEV_OPT_IPV6
;
203 if ((cur
= tb
[DEV_ATTR_PROMISC
])) {
204 s
->promisc
= blobmsg_get_bool(cur
);
205 s
->flags
|= DEV_OPT_PROMISC
;
208 if ((cur
= tb
[DEV_ATTR_RPFILTER
])) {
209 if (system_resolve_rpfilter(blobmsg_data(cur
), &s
->rpfilter
))
210 s
->flags
|= DEV_OPT_RPFILTER
;
212 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur
));
215 if ((cur
= tb
[DEV_ATTR_ACCEPTLOCAL
])) {
216 s
->acceptlocal
= blobmsg_get_bool(cur
);
217 s
->flags
|= DEV_OPT_ACCEPTLOCAL
;
220 if ((cur
= tb
[DEV_ATTR_IGMPVERSION
])) {
221 s
->igmpversion
= blobmsg_get_u32(cur
);
222 if (s
->igmpversion
>= 1 && s
->igmpversion
<= 3)
223 s
->flags
|= DEV_OPT_IGMPVERSION
;
225 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur
));
228 if ((cur
= tb
[DEV_ATTR_MLDVERSION
])) {
229 s
->mldversion
= blobmsg_get_u32(cur
);
230 if (s
->mldversion
>= 1 && s
->mldversion
<= 2)
231 s
->flags
|= DEV_OPT_MLDVERSION
;
233 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur
));
236 device_set_disabled(dev
, disabled
);
239 static void __init
dev_init(void)
241 avl_init(&devices
, avl_strcmp
, true, NULL
);
244 static int device_broadcast_cb(void *ctx
, struct safe_list
*list
)
246 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
249 /* device might have been removed by an earlier callback */
258 void device_broadcast_event(struct device
*dev
, enum device_event ev
)
262 safe_list_for_each(&dev
->aliases
, device_broadcast_cb
, &dev_ev
);
263 safe_list_for_each(&dev
->users
, device_broadcast_cb
, &dev_ev
);
266 int device_claim(struct device_user
*dep
)
268 struct device
*dev
= dep
->dev
;
275 D(DEVICE
, "Claim %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
276 if (++dev
->active
!= 1)
279 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
280 ret
= dev
->set_state(dev
, true);
282 device_broadcast_event(dev
, DEV_EVENT_UP
);
284 D(DEVICE
, "claim %s %s failed: %d\n", dev
->type
->name
, dev
->ifname
, ret
);
286 dep
->claimed
= false;
292 void device_release(struct device_user
*dep
)
294 struct device
*dev
= dep
->dev
;
299 dep
->claimed
= false;
301 D(DEVICE
, "Release %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
302 assert(dev
->active
>= 0);
307 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
309 dev
->set_state(dev
, false);
310 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
313 int device_check_state(struct device
*dev
)
315 if (!dev
->type
->check_state
)
316 return simple_device_type
.check_state(dev
);
318 return dev
->type
->check_state(dev
);
321 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
327 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
329 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
330 INIT_SAFE_LIST(&dev
->users
);
331 INIT_SAFE_LIST(&dev
->aliases
);
335 dev
->set_state
= set_device_state
;
338 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
342 device_init_virtual(dev
, type
, ifname
);
344 dev
->avl
.key
= dev
->ifname
;
346 ret
= avl_insert(&devices
, &dev
->avl
);
350 system_if_clear_state(dev
);
351 device_check_state(dev
);
356 static struct device
*
357 device_create_default(const char *name
, bool external
)
361 if (!external
&& system_if_force_external(name
))
364 D(DEVICE
, "Create simple device '%s'\n", name
);
365 dev
= calloc(1, sizeof(*dev
));
366 dev
->external
= external
;
367 dev
->set_state
= simple_device_set_state
;
368 device_init(dev
, &simple_device_type
, name
);
369 dev
->default_config
= true;
374 device_get(const char *name
, int create
)
378 if (strchr(name
, '.'))
379 return get_vlan_device_chain(name
, create
);
382 return device_alias_get(name
+ 1);
384 dev
= avl_find_element(&devices
, name
, dev
, avl
);
386 if (create
> 1 && !dev
->external
) {
387 dev
->external
= true;
388 device_set_present(dev
, true);
396 return device_create_default(name
, create
> 1);
400 device_delete(struct device
*dev
)
405 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
406 avl_delete(&devices
, &dev
->avl
);
410 static int device_cleanup_cb(void *ctx
, struct safe_list
*list
)
412 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
414 dep
->cb(dep
, DEV_EVENT_REMOVE
);
420 void device_cleanup(struct device
*dev
)
422 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
423 safe_list_for_each(&dev
->users
, device_cleanup_cb
, NULL
);
424 safe_list_for_each(&dev
->aliases
, device_cleanup_cb
, NULL
);
428 static void __device_set_present(struct device
*dev
, bool state
)
430 if (dev
->present
== state
)
433 dev
->present
= state
;
434 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
438 device_refresh_present(struct device
*dev
)
440 bool state
= dev
->sys_present
;
442 if (dev
->disabled
|| dev
->deferred
)
445 __device_set_present(dev
, state
);
448 void device_set_present(struct device
*dev
, bool state
)
450 if (dev
->sys_present
== state
)
453 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
454 dev
->sys_present
= state
;
455 device_refresh_present(dev
);
458 void device_set_link(struct device
*dev
, bool state
)
460 if (dev
->link_active
== state
)
463 netifd_log_message(L_NOTICE
, "%s '%s' link is %s\n", dev
->type
->name
, dev
->ifname
, state
? "up" : "down" );
465 dev
->link_active
= state
;
466 device_broadcast_event(dev
, state
? DEV_EVENT_LINK_UP
: DEV_EVENT_LINK_DOWN
);
469 void device_set_ifindex(struct device
*dev
, int ifindex
)
471 if (dev
->ifindex
== ifindex
)
474 dev
->ifindex
= ifindex
;
475 device_broadcast_event(dev
, DEV_EVENT_UPDATE_IFINDEX
);
478 static int device_refcount(struct device
*dev
)
480 struct list_head
*list
;
483 list_for_each(list
, &dev
->users
.list
)
486 list_for_each(list
, &dev
->aliases
.list
)
492 void device_add_user(struct device_user
*dep
, struct device
*dev
)
494 struct safe_list
*head
;
500 device_remove_user(dep
);
508 head
= &dev
->aliases
;
512 safe_list_add(&dep
->list
, head
);
513 D(DEVICE
, "Add user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
515 if (dep
->cb
&& dev
->present
) {
516 dep
->cb(dep
, DEV_EVENT_ADD
);
518 dep
->cb(dep
, DEV_EVENT_UP
);
520 if (dev
->link_active
)
521 dep
->cb(dep
, DEV_EVENT_LINK_UP
);
526 device_free(struct device
*dev
)
531 dev
->type
->free(dev
);
536 __device_free_unused(struct device
*dev
)
538 if (!safe_list_empty(&dev
->users
) ||
539 !safe_list_empty(&dev
->aliases
) ||
540 dev
->current_config
|| __devlock
)
546 void device_remove_user(struct device_user
*dep
)
548 struct device
*dev
= dep
->dev
;
553 dep
->hotplug
= false;
557 safe_list_del(&dep
->list
);
559 D(DEVICE
, "Remove user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
560 __device_free_unused(dev
);
564 device_free_unused(struct device
*dev
)
569 return __device_free_unused(dev
);
571 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
572 __device_free_unused(dev
);
576 device_init_pending(void)
578 struct device
*dev
, *tmp
;
580 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
581 if (!dev
->config_pending
)
584 dev
->type
->config_init(dev
);
585 dev
->config_pending
= false;
589 static enum dev_change_type
590 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
592 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
593 const struct uci_blob_param_list
*cfg
= dev
->type
->config_params
;
595 if (uci_blob_check_equal(dev
->config
, attr
, cfg
))
596 return DEV_CONFIG_NO_CHANGE
;
598 if (cfg
== &device_attr_list
) {
599 memset(tb
, 0, sizeof(tb
));
602 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
603 blob_data(attr
), blob_len(attr
));
605 device_init_settings(dev
, tb
);
606 return DEV_CONFIG_RESTART
;
608 return DEV_CONFIG_RECREATE
;
612 device_set_config(struct device
*dev
, const struct device_type
*type
,
613 struct blob_attr
*attr
)
615 if (type
!= dev
->type
)
616 return DEV_CONFIG_RECREATE
;
618 if (dev
->type
->reload
)
619 return dev
->type
->reload(dev
, attr
);
621 return device_reload_config(dev
, attr
);
625 device_replace(struct device
*dev
, struct device
*odev
)
627 struct device_user
*dep
, *tmp
;
628 bool present
= odev
->present
;
631 device_set_present(odev
, false);
633 list_for_each_entry_safe(dep
, tmp
, &odev
->users
.list
, list
.list
) {
635 safe_list_del(&dep
->list
);
636 safe_list_add(&dep
->list
, &dev
->users
);
642 device_set_present(dev
, true);
646 device_reset_config(void)
650 avl_for_each_element(&devices
, dev
, avl
)
651 dev
->current_config
= false;
655 device_reset_old(void)
657 struct device
*dev
, *tmp
, *ndev
;
659 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
660 if (dev
->current_config
|| dev
->default_config
)
663 if (dev
->type
!= &simple_device_type
)
666 ndev
= device_create_default(dev
->ifname
, dev
->external
);
667 device_replace(ndev
, dev
);
672 device_create(const char *name
, const struct device_type
*type
,
673 struct blob_attr
*config
)
675 struct device
*odev
= NULL
, *dev
;
676 enum dev_change_type change
;
678 config
= blob_memdup(config
);
682 odev
= device_get(name
, false);
684 odev
->current_config
= true;
685 change
= device_set_config(odev
, type
, config
);
686 if (odev
->external
) {
687 system_if_apply_settings(odev
, &odev
->settings
, odev
->settings
.flags
);
688 change
= DEV_CONFIG_APPLIED
;
691 case DEV_CONFIG_RESTART
:
692 case DEV_CONFIG_APPLIED
:
693 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
695 odev
->config
= config
;
696 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
697 device_set_present(odev
, false);
698 device_set_present(odev
, true);
701 case DEV_CONFIG_NO_CHANGE
:
702 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
705 case DEV_CONFIG_RECREATE
:
706 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
711 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
713 dev
= type
->create(name
, config
);
717 dev
->current_config
= true;
718 dev
->config
= config
;
720 device_replace(dev
, odev
);
722 if (!config_init
&& dev
->config_pending
)
723 type
->config_init(dev
);
729 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
731 struct device_settings st
;
735 avl_for_each_element(&devices
, dev
, avl
) {
738 c
= blobmsg_open_table(b
, dev
->ifname
);
739 device_dump_status(b
, dev
);
740 blobmsg_close_table(b
, c
);
746 blobmsg_add_u8(b
, "external", dev
->external
);
747 blobmsg_add_u8(b
, "present", dev
->present
);
748 blobmsg_add_string(b
, "type", dev
->type
->name
);
753 blobmsg_add_u8(b
, "up", !!dev
->active
);
754 blobmsg_add_u8(b
, "carrier", !!dev
->link_active
);
756 if (dev
->type
->dump_info
)
757 dev
->type
->dump_info(dev
, b
);
759 system_if_dump_info(dev
, b
);
762 device_merge_settings(dev
, &st
);
763 if (st
.flags
& DEV_OPT_MTU
)
764 blobmsg_add_u32(b
, "mtu", st
.mtu
);
765 if (st
.flags
& DEV_OPT_MACADDR
)
766 blobmsg_add_string(b
, "macaddr", format_macaddr(st
.macaddr
));
767 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
768 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
769 if (st
.flags
& DEV_OPT_IPV6
)
770 blobmsg_add_u8(b
, "ipv6", st
.ipv6
);
771 if (st
.flags
& DEV_OPT_PROMISC
)
772 blobmsg_add_u8(b
, "promisc", st
.promisc
);
773 if (st
.flags
& DEV_OPT_RPFILTER
)
774 blobmsg_add_u32(b
, "rpfilter", st
.rpfilter
);
775 if (st
.flags
& DEV_OPT_ACCEPTLOCAL
)
776 blobmsg_add_u8(b
, "acceptlocal", st
.acceptlocal
);
777 if (st
.flags
& DEV_OPT_IGMPVERSION
)
778 blobmsg_add_u32(b
, "igmpversion", st
.igmpversion
);
779 if (st
.flags
& DEV_OPT_MLDVERSION
)
780 blobmsg_add_u32(b
, "mldversion", st
.mldversion
);
783 s
= blobmsg_open_table(b
, "statistics");
784 if (dev
->type
->dump_stats
)
785 dev
->type
->dump_stats(dev
, b
);
787 system_if_dump_stats(dev
, b
);
788 blobmsg_close_table(b
, s
);