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
},
46 const struct uci_blob_param_list device_attr_list
= {
47 .n_params
= __DEV_ATTR_MAX
,
51 static int __devlock
= 0;
53 void device_lock(void)
58 void device_unlock(void)
62 device_free_unused(NULL
);
65 static int set_device_state(struct device
*dev
, bool state
)
68 /* Set ifindex for all devices being enabled so a valid */
69 /* ifindex is in place avoiding possible race conditions */
70 device_set_ifindex(dev
, system_if_resolve(dev
));
87 simple_device_set_state(struct device
*dev
, bool state
)
92 pdev
= dev
->parent
.dev
;
94 pdev
= system_if_get_parent(dev
);
96 device_add_user(&dev
->parent
, pdev
);
101 ret
= device_claim(&dev
->parent
);
103 device_release(&dev
->parent
);
108 return set_device_state(dev
, state
);
111 static struct device
*
112 simple_device_create(const char *name
, struct blob_attr
*attr
)
114 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
115 struct device
*dev
= NULL
;
117 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
118 dev
= device_get(name
, true);
122 dev
->set_state
= simple_device_set_state
;
123 device_init_settings(dev
, tb
);
128 static void simple_device_free(struct device
*dev
)
131 device_remove_user(&dev
->parent
);
135 const struct device_type simple_device_type
= {
136 .name
= "Network device",
137 .config_params
= &device_attr_list
,
139 .create
= simple_device_create
,
140 .check_state
= system_if_check
,
141 .free
= simple_device_free
,
145 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
147 struct device_settings
*os
= &dev
->orig_settings
;
148 struct device_settings
*s
= &dev
->settings
;
150 memset(n
, 0, sizeof(*n
));
151 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
152 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
153 s
->txqueuelen
: os
->txqueuelen
;
155 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
157 n
->ipv6
= s
->flags
& DEV_OPT_IPV6
? s
->ipv6
: os
->ipv6
;
158 n
->promisc
= s
->flags
& DEV_OPT_PROMISC
? s
->promisc
: os
->promisc
;
159 n
->rpfilter
= s
->flags
& DEV_OPT_RPFILTER
? s
->rpfilter
: os
->rpfilter
;
160 n
->acceptlocal
= s
->flags
& DEV_OPT_ACCEPTLOCAL
? s
->acceptlocal
: os
->acceptlocal
;
161 n
->flags
= s
->flags
| os
->flags
;
165 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
167 struct device_settings
*s
= &dev
->settings
;
168 struct blob_attr
*cur
;
169 struct ether_addr
*ea
;
170 bool disabled
= false;
173 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
174 disabled
= !blobmsg_get_bool(cur
);
176 if ((cur
= tb
[DEV_ATTR_MTU
])) {
177 s
->mtu
= blobmsg_get_u32(cur
);
178 s
->flags
|= DEV_OPT_MTU
;
181 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
182 s
->txqueuelen
= blobmsg_get_u32(cur
);
183 s
->flags
|= DEV_OPT_TXQUEUELEN
;
186 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
187 ea
= ether_aton(blobmsg_data(cur
));
189 memcpy(s
->macaddr
, ea
, 6);
190 s
->flags
|= DEV_OPT_MACADDR
;
194 if ((cur
= tb
[DEV_ATTR_IPV6
])) {
195 s
->ipv6
= blobmsg_get_bool(cur
);
196 s
->flags
|= DEV_OPT_IPV6
;
199 if ((cur
= tb
[DEV_ATTR_PROMISC
])) {
200 s
->promisc
= blobmsg_get_bool(cur
);
201 s
->flags
|= DEV_OPT_PROMISC
;
204 if ((cur
= tb
[DEV_ATTR_RPFILTER
])) {
205 if (system_resolve_rpfilter(blobmsg_data(cur
), &s
->rpfilter
))
206 s
->flags
|= DEV_OPT_RPFILTER
;
208 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur
));
211 if ((cur
= tb
[DEV_ATTR_ACCEPTLOCAL
])) {
212 s
->acceptlocal
= blobmsg_get_bool(cur
);
213 s
->flags
|= DEV_OPT_ACCEPTLOCAL
;
216 device_set_disabled(dev
, disabled
);
219 static void __init
dev_init(void)
221 avl_init(&devices
, avl_strcmp
, true, NULL
);
224 static int device_broadcast_cb(void *ctx
, struct safe_list
*list
)
226 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
229 /* device might have been removed by an earlier callback */
238 void device_broadcast_event(struct device
*dev
, enum device_event ev
)
242 safe_list_for_each(&dev
->aliases
, device_broadcast_cb
, &dev_ev
);
243 safe_list_for_each(&dev
->users
, device_broadcast_cb
, &dev_ev
);
246 int device_claim(struct device_user
*dep
)
248 struct device
*dev
= dep
->dev
;
255 D(DEVICE
, "Claim %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
256 if (++dev
->active
!= 1)
259 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
260 ret
= dev
->set_state(dev
, true);
262 device_broadcast_event(dev
, DEV_EVENT_UP
);
264 D(DEVICE
, "claim %s %s failed: %d\n", dev
->type
->name
, dev
->ifname
, ret
);
266 dep
->claimed
= false;
272 void device_release(struct device_user
*dep
)
274 struct device
*dev
= dep
->dev
;
279 dep
->claimed
= false;
281 D(DEVICE
, "Release %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
282 assert(dev
->active
>= 0);
287 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
289 dev
->set_state(dev
, false);
290 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
293 int device_check_state(struct device
*dev
)
295 if (!dev
->type
->check_state
)
296 return simple_device_type
.check_state(dev
);
298 return dev
->type
->check_state(dev
);
301 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
307 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
309 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
310 INIT_SAFE_LIST(&dev
->users
);
311 INIT_SAFE_LIST(&dev
->aliases
);
315 dev
->set_state
= set_device_state
;
318 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
322 device_init_virtual(dev
, type
, ifname
);
324 dev
->avl
.key
= dev
->ifname
;
326 ret
= avl_insert(&devices
, &dev
->avl
);
330 system_if_clear_state(dev
);
331 device_check_state(dev
);
336 static struct device
*
337 device_create_default(const char *name
, bool external
)
341 if (!external
&& system_if_force_external(name
))
344 D(DEVICE
, "Create simple device '%s'\n", name
);
345 dev
= calloc(1, sizeof(*dev
));
346 dev
->external
= external
;
347 dev
->set_state
= simple_device_set_state
;
348 device_init(dev
, &simple_device_type
, name
);
349 dev
->default_config
= true;
354 device_get(const char *name
, int create
)
358 if (strchr(name
, '.'))
359 return get_vlan_device_chain(name
, create
);
362 return device_alias_get(name
+ 1);
364 dev
= avl_find_element(&devices
, name
, dev
, avl
);
366 if (create
> 1 && !dev
->external
) {
367 dev
->external
= true;
368 device_set_present(dev
, true);
376 return device_create_default(name
, create
> 1);
380 device_delete(struct device
*dev
)
385 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
386 avl_delete(&devices
, &dev
->avl
);
390 static int device_cleanup_cb(void *ctx
, struct safe_list
*list
)
392 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
394 dep
->cb(dep
, DEV_EVENT_REMOVE
);
400 void device_cleanup(struct device
*dev
)
402 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
403 safe_list_for_each(&dev
->users
, device_cleanup_cb
, NULL
);
404 safe_list_for_each(&dev
->aliases
, device_cleanup_cb
, NULL
);
408 static void __device_set_present(struct device
*dev
, bool state
)
410 if (dev
->present
== state
)
413 dev
->present
= state
;
414 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
418 device_refresh_present(struct device
*dev
)
420 bool state
= dev
->sys_present
;
422 if (dev
->disabled
|| dev
->deferred
)
425 __device_set_present(dev
, state
);
428 void device_set_present(struct device
*dev
, bool state
)
430 if (dev
->sys_present
== state
)
433 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
434 dev
->sys_present
= state
;
435 device_refresh_present(dev
);
438 void device_set_link(struct device
*dev
, bool state
)
440 if (dev
->link_active
== state
)
443 netifd_log_message(L_NOTICE
, "%s '%s' link is %s\n", dev
->type
->name
, dev
->ifname
, state
? "up" : "down" );
445 dev
->link_active
= state
;
446 device_broadcast_event(dev
, state
? DEV_EVENT_LINK_UP
: DEV_EVENT_LINK_DOWN
);
449 void device_set_ifindex(struct device
*dev
, int ifindex
)
451 if (dev
->ifindex
== ifindex
)
454 dev
->ifindex
= ifindex
;
455 device_broadcast_event(dev
, DEV_EVENT_UPDATE_IFINDEX
);
458 static int device_refcount(struct device
*dev
)
460 struct list_head
*list
;
463 list_for_each(list
, &dev
->users
.list
)
466 list_for_each(list
, &dev
->aliases
.list
)
472 void device_add_user(struct device_user
*dep
, struct device
*dev
)
474 struct safe_list
*head
;
480 device_remove_user(dep
);
488 head
= &dev
->aliases
;
492 safe_list_add(&dep
->list
, head
);
493 D(DEVICE
, "Add user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
495 if (dep
->cb
&& dev
->present
) {
496 dep
->cb(dep
, DEV_EVENT_ADD
);
498 dep
->cb(dep
, DEV_EVENT_UP
);
500 if (dev
->link_active
)
501 dep
->cb(dep
, DEV_EVENT_LINK_UP
);
506 device_free(struct device
*dev
)
511 dev
->type
->free(dev
);
516 __device_free_unused(struct device
*dev
)
518 if (!safe_list_empty(&dev
->users
) ||
519 !safe_list_empty(&dev
->aliases
) ||
520 dev
->current_config
|| __devlock
)
526 void device_remove_user(struct device_user
*dep
)
528 struct device
*dev
= dep
->dev
;
533 dep
->hotplug
= false;
537 safe_list_del(&dep
->list
);
539 D(DEVICE
, "Remove user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
540 __device_free_unused(dev
);
544 device_free_unused(struct device
*dev
)
549 return __device_free_unused(dev
);
551 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
552 __device_free_unused(dev
);
556 device_init_pending(void)
558 struct device
*dev
, *tmp
;
560 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
561 if (!dev
->config_pending
)
564 dev
->type
->config_init(dev
);
565 dev
->config_pending
= false;
569 static enum dev_change_type
570 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
572 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
573 const struct uci_blob_param_list
*cfg
= dev
->type
->config_params
;
575 if (uci_blob_check_equal(dev
->config
, attr
, cfg
))
576 return DEV_CONFIG_NO_CHANGE
;
578 if (cfg
== &device_attr_list
) {
579 memset(tb
, 0, sizeof(tb
));
582 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
583 blob_data(attr
), blob_len(attr
));
585 device_init_settings(dev
, tb
);
586 return DEV_CONFIG_RESTART
;
588 return DEV_CONFIG_RECREATE
;
592 device_set_config(struct device
*dev
, const struct device_type
*type
,
593 struct blob_attr
*attr
)
595 if (type
!= dev
->type
)
596 return DEV_CONFIG_RECREATE
;
598 if (dev
->type
->reload
)
599 return dev
->type
->reload(dev
, attr
);
601 return device_reload_config(dev
, attr
);
605 device_replace(struct device
*dev
, struct device
*odev
)
607 struct device_user
*dep
, *tmp
;
608 bool present
= odev
->present
;
611 device_set_present(odev
, false);
613 list_for_each_entry_safe(dep
, tmp
, &odev
->users
.list
, list
.list
) {
615 safe_list_del(&dep
->list
);
616 safe_list_add(&dep
->list
, &dev
->users
);
622 device_set_present(dev
, true);
626 device_reset_config(void)
630 avl_for_each_element(&devices
, dev
, avl
)
631 dev
->current_config
= false;
635 device_reset_old(void)
637 struct device
*dev
, *tmp
, *ndev
;
639 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
640 if (dev
->current_config
|| dev
->default_config
)
643 if (dev
->type
!= &simple_device_type
)
646 ndev
= device_create_default(dev
->ifname
, dev
->external
);
647 device_replace(ndev
, dev
);
652 device_create(const char *name
, const struct device_type
*type
,
653 struct blob_attr
*config
)
655 struct device
*odev
= NULL
, *dev
;
656 enum dev_change_type change
;
658 config
= blob_memdup(config
);
662 odev
= device_get(name
, false);
664 odev
->current_config
= true;
665 change
= device_set_config(odev
, type
, config
);
666 if (odev
->external
) {
667 system_if_apply_settings(odev
, &odev
->settings
, odev
->settings
.flags
);
668 change
= DEV_CONFIG_APPLIED
;
671 case DEV_CONFIG_RESTART
:
672 case DEV_CONFIG_APPLIED
:
673 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
675 odev
->config
= config
;
676 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
677 device_set_present(odev
, false);
678 device_set_present(odev
, true);
681 case DEV_CONFIG_NO_CHANGE
:
682 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
685 case DEV_CONFIG_RECREATE
:
686 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
691 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
693 dev
= type
->create(name
, config
);
697 dev
->current_config
= true;
698 dev
->config
= config
;
700 device_replace(dev
, odev
);
702 if (!config_init
&& dev
->config_pending
)
703 type
->config_init(dev
);
709 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
711 struct device_settings st
;
715 avl_for_each_element(&devices
, dev
, avl
) {
718 c
= blobmsg_open_table(b
, dev
->ifname
);
719 device_dump_status(b
, dev
);
720 blobmsg_close_table(b
, c
);
726 blobmsg_add_u8(b
, "external", dev
->external
);
727 blobmsg_add_u8(b
, "present", dev
->present
);
728 blobmsg_add_string(b
, "type", dev
->type
->name
);
733 blobmsg_add_u8(b
, "up", !!dev
->active
);
734 blobmsg_add_u8(b
, "carrier", !!dev
->link_active
);
736 if (dev
->type
->dump_info
)
737 dev
->type
->dump_info(dev
, b
);
739 system_if_dump_info(dev
, b
);
742 device_merge_settings(dev
, &st
);
743 if (st
.flags
& DEV_OPT_MTU
)
744 blobmsg_add_u32(b
, "mtu", st
.mtu
);
745 if (st
.flags
& DEV_OPT_MACADDR
)
746 blobmsg_add_string(b
, "macaddr", format_macaddr(st
.macaddr
));
747 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
748 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
749 if (st
.flags
& DEV_OPT_IPV6
)
750 blobmsg_add_u8(b
, "ipv6", st
.ipv6
);
751 if (st
.flags
& DEV_OPT_PROMISC
)
752 blobmsg_add_u8(b
, "promisc", st
.promisc
);
753 if (st
.flags
& DEV_OPT_RPFILTER
)
754 blobmsg_add_u32(b
, "rpfilter", st
.rpfilter
);
755 if (st
.flags
& DEV_OPT_ACCEPTLOCAL
)
756 blobmsg_add_u8(b
, "acceptlocal", st
.acceptlocal
);
759 s
= blobmsg_open_table(b
, "statistics");
760 if (dev
->type
->dump_stats
)
761 dev
->type
->dump_stats(dev
, b
);
763 system_if_dump_stats(dev
, b
);
764 blobmsg_close_table(b
, s
);