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.
22 #include "interface.h"
28 BRIDGE_ATTR_FORWARD_DELAY
,
30 BRIDGE_ATTR_IGMP_SNOOP
,
31 BRIDGE_ATTR_AGEING_TIME
,
32 BRIDGE_ATTR_HELLO_TIME
,
34 BRIDGE_ATTR_BRIDGE_EMPTY
,
35 BRIDGE_ATTR_MULTICAST_QUERIER
,
37 BRIDGE_ATTR_ROBUSTNESS
,
38 BRIDGE_ATTR_QUERY_INTERVAL
,
39 BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL
,
40 BRIDGE_ATTR_LAST_MEMBER_INTERVAL
,
44 static const struct blobmsg_policy bridge_attrs
[__BRIDGE_ATTR_MAX
] = {
45 [BRIDGE_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
46 [BRIDGE_ATTR_STP
] = { "stp", BLOBMSG_TYPE_BOOL
},
47 [BRIDGE_ATTR_FORWARD_DELAY
] = { "forward_delay", BLOBMSG_TYPE_INT32
},
48 [BRIDGE_ATTR_PRIORITY
] = { "priority", BLOBMSG_TYPE_INT32
},
49 [BRIDGE_ATTR_AGEING_TIME
] = { "ageing_time", BLOBMSG_TYPE_INT32
},
50 [BRIDGE_ATTR_HELLO_TIME
] = { "hello_time", BLOBMSG_TYPE_INT32
},
51 [BRIDGE_ATTR_MAX_AGE
] = { "max_age", BLOBMSG_TYPE_INT32
},
52 [BRIDGE_ATTR_IGMP_SNOOP
] = { "igmp_snooping", BLOBMSG_TYPE_BOOL
},
53 [BRIDGE_ATTR_BRIDGE_EMPTY
] = { "bridge_empty", BLOBMSG_TYPE_BOOL
},
54 [BRIDGE_ATTR_MULTICAST_QUERIER
] = { "multicast_querier", BLOBMSG_TYPE_BOOL
},
55 [BRIDGE_ATTR_HASH_MAX
] = { "hash_max", BLOBMSG_TYPE_INT32
},
56 [BRIDGE_ATTR_ROBUSTNESS
] = { "robustness", BLOBMSG_TYPE_INT32
},
57 [BRIDGE_ATTR_QUERY_INTERVAL
] = { "query_interval", BLOBMSG_TYPE_INT32
},
58 [BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL
] = { "query_response_interval", BLOBMSG_TYPE_INT32
},
59 [BRIDGE_ATTR_LAST_MEMBER_INTERVAL
] = { "last_member_interval", BLOBMSG_TYPE_INT32
},
62 static const struct uci_blob_param_info bridge_attr_info
[__BRIDGE_ATTR_MAX
] = {
63 [BRIDGE_ATTR_IFNAME
] = { .type
= BLOBMSG_TYPE_STRING
},
66 static const struct uci_blob_param_list bridge_attr_list
= {
67 .n_params
= __BRIDGE_ATTR_MAX
,
68 .params
= bridge_attrs
,
69 .info
= bridge_attr_info
,
72 .next
= { &device_attr_list
},
75 static struct device
*bridge_create(const char *name
, struct blob_attr
*attr
);
76 static void bridge_config_init(struct device
*dev
);
77 static void bridge_free(struct device
*dev
);
78 static void bridge_dump_info(struct device
*dev
, struct blob_buf
*b
);
80 bridge_reload(struct device
*dev
, struct blob_attr
*attr
);
82 const struct device_type bridge_device_type
= {
84 .config_params
= &bridge_attr_list
,
86 .create
= bridge_create
,
87 .config_init
= bridge_config_init
,
88 .reload
= bridge_reload
,
90 .dump_info
= bridge_dump_info
,
95 device_state_cb set_state
;
97 struct blob_attr
*config_data
;
98 struct bridge_config config
;
99 struct blob_attr
*ifnames
;
103 struct uloop_timeout retry
;
104 struct bridge_member
*primary_port
;
105 struct vlist_tree members
;
110 struct bridge_member
{
111 struct vlist_node node
;
112 struct bridge_state
*bst
;
113 struct device_user dev
;
119 bridge_reset_primary(struct bridge_state
*bst
)
121 struct bridge_member
*bm
;
123 if (!bst
->primary_port
&&
124 (bst
->dev
.settings
.flags
& DEV_OPT_MACADDR
))
127 bst
->primary_port
= NULL
;
128 bst
->dev
.settings
.flags
&= ~DEV_OPT_MACADDR
;
129 vlist_for_each_element(&bst
->members
, bm
, node
) {
135 bst
->primary_port
= bm
;
136 if (bm
->dev
.dev
->settings
.flags
& DEV_OPT_MACADDR
)
137 macaddr
= bm
->dev
.dev
->settings
.macaddr
;
139 macaddr
= bm
->dev
.dev
->orig_settings
.macaddr
;
140 memcpy(bst
->dev
.settings
.macaddr
, macaddr
, 6);
141 bst
->dev
.settings
.flags
|= DEV_OPT_MACADDR
;
147 bridge_disable_member(struct bridge_member
*bm
)
149 struct bridge_state
*bst
= bm
->bst
;
154 system_bridge_delif(&bst
->dev
, bm
->dev
.dev
);
155 device_release(&bm
->dev
);
157 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
163 bridge_enable_interface(struct bridge_state
*bst
)
170 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
179 bridge_disable_interface(struct bridge_state
*bst
)
184 system_bridge_delbr(&bst
->dev
);
189 bridge_enable_member(struct bridge_member
*bm
)
191 struct bridge_state
*bst
= bm
->bst
;
197 ret
= bridge_enable_interface(bst
);
201 /* Disable IPv6 for bridge members */
202 if (!(bm
->dev
.dev
->settings
.flags
& DEV_OPT_IPV6
)) {
203 bm
->dev
.dev
->settings
.ipv6
= 0;
204 bm
->dev
.dev
->settings
.flags
|= DEV_OPT_IPV6
;
207 ret
= device_claim(&bm
->dev
);
211 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
213 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
217 device_set_present(&bst
->dev
, true);
218 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
226 device_release(&bm
->dev
);
232 bridge_remove_member(struct bridge_member
*bm
)
234 struct bridge_state
*bst
= bm
->bst
;
239 if (bm
== bst
->primary_port
)
240 bridge_reset_primary(bst
);
243 bridge_disable_member(bm
);
246 bm
->bst
->n_present
--;
248 if (bst
->config
.bridge_empty
)
251 bst
->force_active
= false;
252 if (bst
->n_present
== 0)
253 device_set_present(&bst
->dev
, false);
257 bridge_free_member(struct bridge_member
*bm
)
259 struct device
*dev
= bm
->dev
.dev
;
261 bridge_remove_member(bm
);
262 device_remove_user(&bm
->dev
);
265 * When reloading the config and moving a device from one bridge to
266 * another, the other bridge may have tried to claim this device
267 * before it was removed here.
268 * Ensure that claiming the device is retried by toggling its present
272 device_set_present(dev
, false);
273 device_set_present(dev
, true);
280 bridge_check_retry(struct bridge_state
*bst
)
285 uloop_timeout_set(&bst
->retry
, 100);
289 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
291 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
292 struct bridge_state
*bst
= bm
->bst
;
296 assert(!bm
->present
);
301 if (bst
->n_present
== 1)
302 device_set_present(&bst
->dev
, true);
303 if (bst
->dev
.active
&& !bridge_enable_member(bm
)) {
305 * Adding a bridge member can overwrite the bridge mtu
306 * in the kernel, apply the bridge settings in case the
309 system_if_apply_settings(&bst
->dev
, &bst
->dev
.settings
,
310 DEV_OPT_MTU
| DEV_OPT_MTU6
);
314 case DEV_EVENT_REMOVE
:
316 vlist_delete(&bst
->members
, &bm
->node
);
321 bridge_remove_member(bm
);
330 bridge_set_down(struct bridge_state
*bst
)
332 struct bridge_member
*bm
;
334 bst
->set_state(&bst
->dev
, false);
336 vlist_for_each_element(&bst
->members
, bm
, node
)
337 bridge_disable_member(bm
);
339 bridge_disable_interface(bst
);
345 bridge_set_up(struct bridge_state
*bst
)
347 struct bridge_member
*bm
;
350 if (!bst
->n_present
) {
351 if (!bst
->force_active
)
354 ret
= bridge_enable_interface(bst
);
360 vlist_for_each_element(&bst
->members
, bm
, node
)
361 bridge_enable_member(bm
);
362 bridge_check_retry(bst
);
364 if (!bst
->force_active
&& !bst
->n_present
) {
365 /* initialization of all member interfaces failed */
366 bridge_disable_interface(bst
);
367 device_set_present(&bst
->dev
, false);
371 bridge_reset_primary(bst
);
372 ret
= bst
->set_state(&bst
->dev
, true);
374 bridge_set_down(bst
);
380 bridge_set_state(struct device
*dev
, bool up
)
382 struct bridge_state
*bst
;
384 bst
= container_of(dev
, struct bridge_state
, dev
);
387 return bridge_set_up(bst
);
389 return bridge_set_down(bst
);
392 static struct bridge_member
*
393 bridge_create_member(struct bridge_state
*bst
, struct device
*dev
, bool hotplug
)
395 struct bridge_member
*bm
;
397 bm
= calloc(1, sizeof(*bm
) + strlen(dev
->ifname
) + 1);
402 bm
->dev
.cb
= bridge_member_cb
;
403 bm
->dev
.hotplug
= hotplug
;
404 strcpy(bm
->name
, dev
->ifname
);
406 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
407 // Need to look up the bridge member again as the above
408 // created pointer will be freed in case the bridge member
410 bm
= vlist_find(&bst
->members
, dev
->ifname
, bm
, node
);
412 bm
->node
.version
= -1;
418 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
419 struct vlist_node
*node_old
)
421 struct bridge_member
*bm
;
425 bm
= container_of(node_new
, struct bridge_member
, node
);
434 device_add_user(&bm
->dev
, dev
);
439 bm
= container_of(node_old
, struct bridge_member
, node
);
440 bridge_free_member(bm
);
446 bridge_add_member(struct bridge_state
*bst
, const char *name
)
450 dev
= device_get(name
, true);
454 bridge_create_member(bst
, dev
, false);
458 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
460 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
462 bridge_create_member(bst
, member
, true);
468 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
470 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
471 struct bridge_member
*bm
;
473 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
475 return UBUS_STATUS_NOT_FOUND
;
477 vlist_delete(&bst
->members
, &bm
->node
);
482 bridge_hotplug_prepare(struct device
*dev
)
484 struct bridge_state
*bst
;
486 bst
= container_of(dev
, struct bridge_state
, dev
);
487 bst
->force_active
= true;
488 device_set_present(&bst
->dev
, true);
493 static const struct device_hotplug_ops bridge_ops
= {
494 .prepare
= bridge_hotplug_prepare
,
495 .add
= bridge_hotplug_add
,
496 .del
= bridge_hotplug_del
500 bridge_free(struct device
*dev
)
502 struct bridge_state
*bst
;
504 bst
= container_of(dev
, struct bridge_state
, dev
);
505 vlist_flush_all(&bst
->members
);
506 free(bst
->config_data
);
511 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
513 struct bridge_state
*bst
;
514 struct bridge_member
*bm
;
517 bst
= container_of(dev
, struct bridge_state
, dev
);
519 system_if_dump_info(dev
, b
);
520 list
= blobmsg_open_array(b
, "bridge-members");
522 vlist_for_each_element(&bst
->members
, bm
, node
)
523 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
525 blobmsg_close_array(b
, list
);
529 bridge_config_init(struct device
*dev
)
531 struct bridge_state
*bst
;
532 struct blob_attr
*cur
;
535 bst
= container_of(dev
, struct bridge_state
, dev
);
537 if (bst
->config
.bridge_empty
) {
538 bst
->force_active
= true;
539 device_set_present(&bst
->dev
, true);
543 vlist_update(&bst
->members
);
545 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
546 bridge_add_member(bst
, blobmsg_data(cur
));
549 vlist_flush(&bst
->members
);
550 bridge_check_retry(bst
);
554 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
556 struct bridge_config
*cfg
= &bst
->config
;
557 struct blob_attr
*cur
;
561 cfg
->forward_delay
= 2;
562 cfg
->igmp_snoop
= true;
563 cfg
->multicast_querier
= true;
565 cfg
->query_interval
= 12500;
566 cfg
->query_response_interval
= 1000;
567 cfg
->last_member_interval
= 100;
569 cfg
->bridge_empty
= false;
570 cfg
->priority
= 0x7FFF;
572 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
573 cfg
->stp
= blobmsg_get_bool(cur
);
575 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
576 cfg
->forward_delay
= blobmsg_get_u32(cur
);
578 if ((cur
= tb
[BRIDGE_ATTR_PRIORITY
]))
579 cfg
->priority
= blobmsg_get_u32(cur
);
581 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
582 cfg
->multicast_querier
= cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
584 if ((cur
= tb
[BRIDGE_ATTR_MULTICAST_QUERIER
]))
585 cfg
->multicast_querier
= blobmsg_get_bool(cur
);
587 if ((cur
= tb
[BRIDGE_ATTR_HASH_MAX
]))
588 cfg
->hash_max
= blobmsg_get_u32(cur
);
590 if ((cur
= tb
[BRIDGE_ATTR_ROBUSTNESS
])) {
591 cfg
->robustness
= blobmsg_get_u32(cur
);
592 cfg
->flags
|= BRIDGE_OPT_ROBUSTNESS
;
595 if ((cur
= tb
[BRIDGE_ATTR_QUERY_INTERVAL
])) {
596 cfg
->query_interval
= blobmsg_get_u32(cur
);
597 cfg
->flags
|= BRIDGE_OPT_QUERY_INTERVAL
;
600 if ((cur
= tb
[BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL
])) {
601 cfg
->query_response_interval
= blobmsg_get_u32(cur
);
602 cfg
->flags
|= BRIDGE_OPT_QUERY_RESPONSE_INTERVAL
;
605 if ((cur
= tb
[BRIDGE_ATTR_LAST_MEMBER_INTERVAL
])) {
606 cfg
->last_member_interval
= blobmsg_get_u32(cur
);
607 cfg
->flags
|= BRIDGE_OPT_LAST_MEMBER_INTERVAL
;
610 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
611 cfg
->ageing_time
= blobmsg_get_u32(cur
);
612 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
615 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
616 cfg
->hello_time
= blobmsg_get_u32(cur
);
617 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
620 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
621 cfg
->max_age
= blobmsg_get_u32(cur
);
622 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
625 if ((cur
= tb
[BRIDGE_ATTR_BRIDGE_EMPTY
]))
626 cfg
->bridge_empty
= blobmsg_get_bool(cur
);
630 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
632 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
633 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
634 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
636 struct bridge_state
*bst
;
638 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
639 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
641 bst
= container_of(dev
, struct bridge_state
, dev
);
642 attr
= blob_memdup(attr
);
644 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
645 blob_data(attr
), blob_len(attr
));
646 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
647 blob_data(attr
), blob_len(attr
));
649 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
650 device_init_settings(dev
, tb_dev
);
651 bridge_apply_settings(bst
, tb_br
);
653 if (bst
->config_data
) {
654 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
655 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
657 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
658 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
661 uci_blob_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
663 ret
= DEV_CONFIG_RESTART
;
665 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
666 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
669 uci_blob_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
670 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
671 ret
= DEV_CONFIG_RESTART
;
673 bridge_config_init(dev
);
676 free(bst
->config_data
);
677 bst
->config_data
= attr
;
682 bridge_retry_members(struct uloop_timeout
*timeout
)
684 struct bridge_state
*bst
= container_of(timeout
, struct bridge_state
, retry
);
685 struct bridge_member
*bm
;
688 vlist_for_each_element(&bst
->members
, bm
, node
) {
692 if (!bm
->dev
.dev
->present
)
697 bridge_enable_member(bm
);
701 static struct device
*
702 bridge_create(const char *name
, struct blob_attr
*attr
)
704 struct bridge_state
*bst
;
705 struct device
*dev
= NULL
;
707 bst
= calloc(1, sizeof(*bst
));
712 device_init(dev
, &bridge_device_type
, name
);
713 dev
->config_pending
= true;
714 bst
->retry
.cb
= bridge_retry_members
;
716 bst
->set_state
= dev
->set_state
;
717 dev
->set_state
= bridge_set_state
;
719 dev
->hotplug_ops
= &bridge_ops
;
721 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
722 bst
->members
.keep_old
= true;
723 bridge_reload(dev
, attr
);