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
},
44 const struct uci_blob_param_list device_attr_list
= {
45 .n_params
= __DEV_ATTR_MAX
,
49 static int __devlock
= 0;
51 void device_lock(void)
56 void device_unlock(void)
60 device_free_unused(NULL
);
63 static int set_device_state(struct device
*dev
, bool state
)
77 simple_device_set_state(struct device
*dev
, bool state
)
82 pdev
= dev
->parent
.dev
;
84 pdev
= system_if_get_parent(dev
);
86 device_add_user(&dev
->parent
, pdev
);
91 ret
= device_claim(&dev
->parent
);
93 device_release(&dev
->parent
);
98 return set_device_state(dev
, state
);
101 static struct device
*
102 simple_device_create(const char *name
, struct blob_attr
*attr
)
104 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
105 struct device
*dev
= NULL
;
107 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
108 dev
= device_get(name
, true);
112 dev
->set_state
= simple_device_set_state
;
113 device_init_settings(dev
, tb
);
118 static void simple_device_free(struct device
*dev
)
121 device_remove_user(&dev
->parent
);
125 const struct device_type simple_device_type
= {
126 .name
= "Network device",
127 .config_params
= &device_attr_list
,
129 .create
= simple_device_create
,
130 .check_state
= system_if_check
,
131 .free
= simple_device_free
,
135 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
137 struct device_settings
*os
= &dev
->orig_settings
;
138 struct device_settings
*s
= &dev
->settings
;
140 memset(n
, 0, sizeof(*n
));
141 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
142 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
143 s
->txqueuelen
: os
->txqueuelen
;
145 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
147 n
->ipv6
= s
->flags
& DEV_OPT_IPV6
? s
->ipv6
: os
->ipv6
;
148 n
->promisc
= s
->flags
& DEV_OPT_PROMISC
? s
->promisc
: os
->promisc
;
149 n
->flags
= s
->flags
| os
->flags
;
153 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
155 struct device_settings
*s
= &dev
->settings
;
156 struct blob_attr
*cur
;
157 struct ether_addr
*ea
;
158 bool disabled
= false;
161 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
162 disabled
= !blobmsg_get_bool(cur
);
164 if ((cur
= tb
[DEV_ATTR_MTU
])) {
165 s
->mtu
= blobmsg_get_u32(cur
);
166 s
->flags
|= DEV_OPT_MTU
;
169 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
170 s
->txqueuelen
= blobmsg_get_u32(cur
);
171 s
->flags
|= DEV_OPT_TXQUEUELEN
;
174 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
175 ea
= ether_aton(blobmsg_data(cur
));
177 memcpy(s
->macaddr
, ea
, 6);
178 s
->flags
|= DEV_OPT_MACADDR
;
182 if ((cur
= tb
[DEV_ATTR_IPV6
])) {
183 s
->ipv6
= blobmsg_get_bool(cur
);
184 s
->flags
|= DEV_OPT_IPV6
;
187 if ((cur
= tb
[DEV_ATTR_PROMISC
])) {
188 s
->promisc
= blobmsg_get_bool(cur
);
189 s
->flags
|= DEV_OPT_PROMISC
;
192 device_set_disabled(dev
, disabled
);
195 static void __init
dev_init(void)
197 avl_init(&devices
, avl_strcmp
, true, NULL
);
200 static int device_broadcast_cb(void *ctx
, struct safe_list
*list
)
202 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
205 /* device might have been removed by an earlier callback */
214 void device_broadcast_event(struct device
*dev
, enum device_event ev
)
218 safe_list_for_each(&dev
->aliases
, device_broadcast_cb
, &dev_ev
);
219 safe_list_for_each(&dev
->users
, device_broadcast_cb
, &dev_ev
);
222 int device_claim(struct device_user
*dep
)
224 struct device
*dev
= dep
->dev
;
231 D(DEVICE
, "Claim %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
232 if (++dev
->active
!= 1)
235 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
236 ret
= dev
->set_state(dev
, true);
238 device_broadcast_event(dev
, DEV_EVENT_UP
);
240 D(DEVICE
, "claim %s %s failed: %d\n", dev
->type
->name
, dev
->ifname
, ret
);
242 dep
->claimed
= false;
248 void device_release(struct device_user
*dep
)
250 struct device
*dev
= dep
->dev
;
255 dep
->claimed
= false;
257 D(DEVICE
, "Release %s %s, new active count: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
258 assert(dev
->active
>= 0);
263 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
265 dev
->set_state(dev
, false);
266 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
269 int device_check_state(struct device
*dev
)
271 if (!dev
->type
->check_state
)
272 return simple_device_type
.check_state(dev
);
274 return dev
->type
->check_state(dev
);
277 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
283 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
285 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
286 INIT_SAFE_LIST(&dev
->users
);
287 INIT_SAFE_LIST(&dev
->aliases
);
291 dev
->set_state
= set_device_state
;
294 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
298 device_init_virtual(dev
, type
, ifname
);
300 dev
->avl
.key
= dev
->ifname
;
302 ret
= avl_insert(&devices
, &dev
->avl
);
306 system_if_clear_state(dev
);
307 device_check_state(dev
);
312 static struct device
*
313 device_create_default(const char *name
, bool external
)
317 if (!external
&& system_if_force_external(name
))
320 D(DEVICE
, "Create simple device '%s'\n", name
);
321 dev
= calloc(1, sizeof(*dev
));
322 dev
->external
= external
;
323 dev
->set_state
= simple_device_set_state
;
324 device_init(dev
, &simple_device_type
, name
);
325 dev
->default_config
= true;
330 device_get(const char *name
, int create
)
334 if (strchr(name
, '.'))
335 return get_vlan_device_chain(name
, create
);
338 return device_alias_get(name
+ 1);
340 dev
= avl_find_element(&devices
, name
, dev
, avl
);
342 if (create
> 1 && !dev
->external
) {
343 dev
->external
= true;
344 device_set_present(dev
, true);
352 return device_create_default(name
, create
> 1);
356 device_delete(struct device
*dev
)
361 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
362 avl_delete(&devices
, &dev
->avl
);
366 static int device_cleanup_cb(void *ctx
, struct safe_list
*list
)
368 struct device_user
*dep
= container_of(list
, struct device_user
, list
);
370 dep
->cb(dep
, DEV_EVENT_REMOVE
);
376 void device_cleanup(struct device
*dev
)
378 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
379 safe_list_for_each(&dev
->users
, device_cleanup_cb
, NULL
);
380 safe_list_for_each(&dev
->aliases
, device_cleanup_cb
, NULL
);
384 static void __device_set_present(struct device
*dev
, bool state
)
386 if (dev
->present
== state
)
389 dev
->present
= state
;
390 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
394 device_refresh_present(struct device
*dev
)
396 bool state
= dev
->sys_present
;
398 if (dev
->disabled
|| dev
->deferred
)
401 __device_set_present(dev
, state
);
404 void device_set_present(struct device
*dev
, bool state
)
406 if (dev
->sys_present
== state
)
409 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
410 dev
->sys_present
= state
;
411 device_refresh_present(dev
);
414 void device_set_link(struct device
*dev
, bool state
)
416 if (dev
->link_active
== state
)
419 netifd_log_message(L_NOTICE
, "%s '%s' link is %s\n", dev
->type
->name
, dev
->ifname
, state
? "up" : "down" );
421 dev
->link_active
= state
;
422 device_broadcast_event(dev
, state
? DEV_EVENT_LINK_UP
: DEV_EVENT_LINK_DOWN
);
425 void device_set_ifindex(struct device
*dev
, int ifindex
)
427 if (dev
->ifindex
== ifindex
)
430 dev
->ifindex
= ifindex
;
431 device_broadcast_event(dev
, DEV_EVENT_UPDATE_IFINDEX
);
434 static int device_refcount(struct device
*dev
)
436 struct list_head
*list
;
439 list_for_each(list
, &dev
->users
.list
)
442 list_for_each(list
, &dev
->aliases
.list
)
448 void device_add_user(struct device_user
*dep
, struct device
*dev
)
450 struct safe_list
*head
;
456 device_remove_user(dep
);
464 head
= &dev
->aliases
;
468 safe_list_add(&dep
->list
, head
);
469 D(DEVICE
, "Add user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
471 if (dep
->cb
&& dev
->present
) {
472 dep
->cb(dep
, DEV_EVENT_ADD
);
474 dep
->cb(dep
, DEV_EVENT_UP
);
476 if (dev
->link_active
)
477 dep
->cb(dep
, DEV_EVENT_LINK_UP
);
482 device_free(struct device
*dev
)
487 dev
->type
->free(dev
);
492 __device_free_unused(struct device
*dev
)
494 if (!safe_list_empty(&dev
->users
) ||
495 !safe_list_empty(&dev
->aliases
) ||
496 dev
->current_config
|| __devlock
)
502 void device_remove_user(struct device_user
*dep
)
504 struct device
*dev
= dep
->dev
;
509 dep
->hotplug
= false;
513 safe_list_del(&dep
->list
);
515 D(DEVICE
, "Remove user for device '%s', refcount=%d\n", dev
->ifname
, device_refcount(dev
));
516 __device_free_unused(dev
);
520 device_free_unused(struct device
*dev
)
525 return __device_free_unused(dev
);
527 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
528 __device_free_unused(dev
);
532 device_init_pending(void)
534 struct device
*dev
, *tmp
;
536 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
537 if (!dev
->config_pending
)
540 dev
->type
->config_init(dev
);
541 dev
->config_pending
= false;
545 static enum dev_change_type
546 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
548 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
549 const struct uci_blob_param_list
*cfg
= dev
->type
->config_params
;
551 if (uci_blob_check_equal(dev
->config
, attr
, cfg
))
552 return DEV_CONFIG_NO_CHANGE
;
554 if (cfg
== &device_attr_list
) {
555 memset(tb
, 0, sizeof(tb
));
558 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
559 blob_data(attr
), blob_len(attr
));
561 device_init_settings(dev
, tb
);
562 return DEV_CONFIG_RESTART
;
564 return DEV_CONFIG_RECREATE
;
568 device_set_config(struct device
*dev
, const struct device_type
*type
,
569 struct blob_attr
*attr
)
571 if (type
!= dev
->type
)
572 return DEV_CONFIG_RECREATE
;
574 if (dev
->type
->reload
)
575 return dev
->type
->reload(dev
, attr
);
577 return device_reload_config(dev
, attr
);
581 device_replace(struct device
*dev
, struct device
*odev
)
583 struct device_user
*dep
, *tmp
;
584 bool present
= odev
->present
;
587 device_set_present(odev
, false);
589 list_for_each_entry_safe(dep
, tmp
, &odev
->users
.list
, list
.list
) {
591 safe_list_del(&dep
->list
);
592 safe_list_add(&dep
->list
, &dev
->users
);
598 device_set_present(dev
, true);
602 device_reset_config(void)
606 avl_for_each_element(&devices
, dev
, avl
)
607 dev
->current_config
= false;
611 device_reset_old(void)
613 struct device
*dev
, *tmp
, *ndev
;
615 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
616 if (dev
->current_config
|| dev
->default_config
)
619 if (dev
->type
!= &simple_device_type
)
622 ndev
= device_create_default(dev
->ifname
, dev
->external
);
623 device_replace(ndev
, dev
);
628 device_create(const char *name
, const struct device_type
*type
,
629 struct blob_attr
*config
)
631 struct device
*odev
= NULL
, *dev
;
632 enum dev_change_type change
;
634 config
= blob_memdup(config
);
638 odev
= device_get(name
, false);
640 odev
->current_config
= true;
641 change
= device_set_config(odev
, type
, config
);
642 if (odev
->external
) {
643 system_if_apply_settings(odev
, &odev
->settings
, odev
->settings
.flags
);
644 change
= DEV_CONFIG_APPLIED
;
647 case DEV_CONFIG_RESTART
:
648 case DEV_CONFIG_APPLIED
:
649 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
651 odev
->config
= config
;
652 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
653 device_set_present(odev
, false);
654 device_set_present(odev
, true);
657 case DEV_CONFIG_NO_CHANGE
:
658 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
661 case DEV_CONFIG_RECREATE
:
662 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
667 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
669 dev
= type
->create(name
, config
);
673 dev
->current_config
= true;
674 dev
->config
= config
;
676 device_replace(dev
, odev
);
678 if (!config_init
&& dev
->config_pending
)
679 type
->config_init(dev
);
685 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
687 struct device_settings st
;
691 avl_for_each_element(&devices
, dev
, avl
) {
694 c
= blobmsg_open_table(b
, dev
->ifname
);
695 device_dump_status(b
, dev
);
696 blobmsg_close_table(b
, c
);
702 blobmsg_add_u8(b
, "external", dev
->external
);
703 blobmsg_add_u8(b
, "present", dev
->present
);
704 blobmsg_add_string(b
, "type", dev
->type
->name
);
709 blobmsg_add_u8(b
, "up", !!dev
->active
);
710 blobmsg_add_u8(b
, "carrier", !!dev
->link_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", format_macaddr(st
.macaddr
));
723 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
724 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
725 if (st
.flags
& DEV_OPT_IPV6
)
726 blobmsg_add_u8(b
, "ipv6", st
.ipv6
);
727 if (st
.flags
& DEV_OPT_PROMISC
)
728 blobmsg_add_u8(b
, "promisc", st
.promisc
);
731 s
= blobmsg_open_table(b
, "statistics");
732 if (dev
->type
->dump_stats
)
733 dev
->type
->dump_stats(dev
, b
);
735 system_if_dump_stats(dev
, b
);
736 blobmsg_close_table(b
, s
);