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 device_type
*devtype
,
76 struct blob_attr
*attr
);
77 static void bridge_config_init(struct device
*dev
);
78 static void bridge_free(struct device
*dev
);
79 static void bridge_dump_info(struct device
*dev
, struct blob_buf
*b
);
81 bridge_reload(struct device
*dev
, struct blob_attr
*attr
);
83 static struct device_type bridge_device_type
= {
85 .config_params
= &bridge_attr_list
,
87 .bridge_capability
= true,
90 .create
= bridge_create
,
91 .config_init
= bridge_config_init
,
92 .reload
= bridge_reload
,
94 .dump_info
= bridge_dump_info
,
99 device_state_cb set_state
;
101 struct blob_attr
*config_data
;
102 struct bridge_config config
;
103 struct blob_attr
*ifnames
;
107 struct uloop_timeout retry
;
108 struct bridge_member
*primary_port
;
109 struct vlist_tree members
;
114 struct bridge_member
{
115 struct vlist_node node
;
116 struct bridge_state
*bst
;
117 struct device_user dev
;
123 bridge_reset_primary(struct bridge_state
*bst
)
125 struct bridge_member
*bm
;
127 if (!bst
->primary_port
&&
128 (bst
->dev
.settings
.flags
& DEV_OPT_MACADDR
))
131 bst
->primary_port
= NULL
;
132 bst
->dev
.settings
.flags
&= ~DEV_OPT_MACADDR
;
133 vlist_for_each_element(&bst
->members
, bm
, node
) {
139 bst
->primary_port
= bm
;
140 if (bm
->dev
.dev
->settings
.flags
& DEV_OPT_MACADDR
)
141 macaddr
= bm
->dev
.dev
->settings
.macaddr
;
143 macaddr
= bm
->dev
.dev
->orig_settings
.macaddr
;
144 memcpy(bst
->dev
.settings
.macaddr
, macaddr
, 6);
145 bst
->dev
.settings
.flags
|= DEV_OPT_MACADDR
;
151 bridge_disable_member(struct bridge_member
*bm
)
153 struct bridge_state
*bst
= bm
->bst
;
158 system_bridge_delif(&bst
->dev
, bm
->dev
.dev
);
159 device_release(&bm
->dev
);
161 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
167 bridge_enable_interface(struct bridge_state
*bst
)
174 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
183 bridge_disable_interface(struct bridge_state
*bst
)
188 system_bridge_delbr(&bst
->dev
);
193 bridge_enable_member(struct bridge_member
*bm
)
195 struct bridge_state
*bst
= bm
->bst
;
201 ret
= bridge_enable_interface(bst
);
205 /* Disable IPv6 for bridge members */
206 if (!(bm
->dev
.dev
->settings
.flags
& DEV_OPT_IPV6
)) {
207 bm
->dev
.dev
->settings
.ipv6
= 0;
208 bm
->dev
.dev
->settings
.flags
|= DEV_OPT_IPV6
;
211 ret
= device_claim(&bm
->dev
);
215 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
217 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
221 device_set_present(&bst
->dev
, true);
222 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
230 device_release(&bm
->dev
);
236 bridge_remove_member(struct bridge_member
*bm
)
238 struct bridge_state
*bst
= bm
->bst
;
243 if (bm
== bst
->primary_port
)
244 bridge_reset_primary(bst
);
247 bridge_disable_member(bm
);
250 bm
->bst
->n_present
--;
252 if (bst
->config
.bridge_empty
)
255 bst
->force_active
= false;
256 if (bst
->n_present
== 0)
257 device_set_present(&bst
->dev
, false);
261 bridge_free_member(struct bridge_member
*bm
)
263 struct device
*dev
= bm
->dev
.dev
;
265 bridge_remove_member(bm
);
266 device_remove_user(&bm
->dev
);
269 * When reloading the config and moving a device from one bridge to
270 * another, the other bridge may have tried to claim this device
271 * before it was removed here.
272 * Ensure that claiming the device is retried by toggling its present
276 device_set_present(dev
, false);
277 device_set_present(dev
, true);
284 bridge_check_retry(struct bridge_state
*bst
)
289 uloop_timeout_set(&bst
->retry
, 100);
293 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
295 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
296 struct bridge_state
*bst
= bm
->bst
;
300 assert(!bm
->present
);
305 if (bst
->n_present
== 1)
306 device_set_present(&bst
->dev
, true);
307 if (bst
->dev
.active
&& !bridge_enable_member(bm
)) {
309 * Adding a bridge member can overwrite the bridge mtu
310 * in the kernel, apply the bridge settings in case the
313 system_if_apply_settings(&bst
->dev
, &bst
->dev
.settings
,
314 DEV_OPT_MTU
| DEV_OPT_MTU6
);
318 case DEV_EVENT_REMOVE
:
320 vlist_delete(&bst
->members
, &bm
->node
);
325 bridge_remove_member(bm
);
334 bridge_set_down(struct bridge_state
*bst
)
336 struct bridge_member
*bm
;
338 bst
->set_state(&bst
->dev
, false);
340 vlist_for_each_element(&bst
->members
, bm
, node
)
341 bridge_disable_member(bm
);
343 bridge_disable_interface(bst
);
349 bridge_set_up(struct bridge_state
*bst
)
351 struct bridge_member
*bm
;
354 if (!bst
->n_present
) {
355 if (!bst
->force_active
)
358 ret
= bridge_enable_interface(bst
);
364 vlist_for_each_element(&bst
->members
, bm
, node
)
365 bridge_enable_member(bm
);
366 bridge_check_retry(bst
);
368 if (!bst
->force_active
&& !bst
->n_present
) {
369 /* initialization of all member interfaces failed */
370 bridge_disable_interface(bst
);
371 device_set_present(&bst
->dev
, false);
375 bridge_reset_primary(bst
);
376 ret
= bst
->set_state(&bst
->dev
, true);
378 bridge_set_down(bst
);
384 bridge_set_state(struct device
*dev
, bool up
)
386 struct bridge_state
*bst
;
388 bst
= container_of(dev
, struct bridge_state
, dev
);
391 return bridge_set_up(bst
);
393 return bridge_set_down(bst
);
396 static struct bridge_member
*
397 bridge_create_member(struct bridge_state
*bst
, const char *name
,
398 struct device
*dev
, bool hotplug
)
400 struct bridge_member
*bm
;
402 bm
= calloc(1, sizeof(*bm
) + strlen(name
) + 1);
407 bm
->dev
.cb
= bridge_member_cb
;
408 bm
->dev
.hotplug
= hotplug
;
409 strcpy(bm
->name
, name
);
411 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
412 // Need to look up the bridge member again as the above
413 // created pointer will be freed in case the bridge member
415 bm
= vlist_find(&bst
->members
, name
, bm
, node
);
417 bm
->node
.version
= -1;
423 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
424 struct vlist_node
*node_old
)
426 struct bridge_member
*bm
;
430 bm
= container_of(node_new
, struct bridge_member
, node
);
439 device_add_user(&bm
->dev
, dev
);
444 bm
= container_of(node_old
, struct bridge_member
, node
);
445 bridge_free_member(bm
);
451 bridge_add_member(struct bridge_state
*bst
, const char *name
)
455 dev
= device_get(name
, true);
459 bridge_create_member(bst
, name
, dev
, false);
463 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
465 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
467 bridge_create_member(bst
, member
->ifname
, member
, true);
473 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
475 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
476 struct bridge_member
*bm
;
478 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
480 return UBUS_STATUS_NOT_FOUND
;
482 vlist_delete(&bst
->members
, &bm
->node
);
487 bridge_hotplug_prepare(struct device
*dev
)
489 struct bridge_state
*bst
;
491 bst
= container_of(dev
, struct bridge_state
, dev
);
492 bst
->force_active
= true;
493 device_set_present(&bst
->dev
, true);
498 static const struct device_hotplug_ops bridge_ops
= {
499 .prepare
= bridge_hotplug_prepare
,
500 .add
= bridge_hotplug_add
,
501 .del
= bridge_hotplug_del
505 bridge_free(struct device
*dev
)
507 struct bridge_state
*bst
;
509 bst
= container_of(dev
, struct bridge_state
, dev
);
510 vlist_flush_all(&bst
->members
);
511 free(bst
->config_data
);
516 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
518 struct bridge_state
*bst
;
519 struct bridge_member
*bm
;
522 bst
= container_of(dev
, struct bridge_state
, dev
);
524 system_if_dump_info(dev
, b
);
525 list
= blobmsg_open_array(b
, "bridge-members");
527 vlist_for_each_element(&bst
->members
, bm
, node
) {
528 if (bm
->dev
.dev
->hidden
)
531 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
534 blobmsg_close_array(b
, list
);
538 bridge_config_init(struct device
*dev
)
540 struct bridge_state
*bst
;
541 struct blob_attr
*cur
;
544 bst
= container_of(dev
, struct bridge_state
, dev
);
546 if (bst
->config
.bridge_empty
) {
547 bst
->force_active
= true;
548 device_set_present(&bst
->dev
, true);
552 vlist_update(&bst
->members
);
554 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
555 bridge_add_member(bst
, blobmsg_data(cur
));
558 vlist_flush(&bst
->members
);
559 bridge_check_retry(bst
);
563 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
565 struct bridge_config
*cfg
= &bst
->config
;
566 struct blob_attr
*cur
;
570 cfg
->forward_delay
= 2;
571 cfg
->igmp_snoop
= true;
572 cfg
->multicast_querier
= true;
574 cfg
->query_interval
= 12500;
575 cfg
->query_response_interval
= 1000;
576 cfg
->last_member_interval
= 100;
578 cfg
->bridge_empty
= false;
579 cfg
->priority
= 0x7FFF;
581 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
582 cfg
->stp
= blobmsg_get_bool(cur
);
584 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
585 cfg
->forward_delay
= blobmsg_get_u32(cur
);
587 if ((cur
= tb
[BRIDGE_ATTR_PRIORITY
]))
588 cfg
->priority
= blobmsg_get_u32(cur
);
590 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
591 cfg
->multicast_querier
= cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
593 if ((cur
= tb
[BRIDGE_ATTR_MULTICAST_QUERIER
]))
594 cfg
->multicast_querier
= blobmsg_get_bool(cur
);
596 if ((cur
= tb
[BRIDGE_ATTR_HASH_MAX
]))
597 cfg
->hash_max
= blobmsg_get_u32(cur
);
599 if ((cur
= tb
[BRIDGE_ATTR_ROBUSTNESS
])) {
600 cfg
->robustness
= blobmsg_get_u32(cur
);
601 cfg
->flags
|= BRIDGE_OPT_ROBUSTNESS
;
604 if ((cur
= tb
[BRIDGE_ATTR_QUERY_INTERVAL
])) {
605 cfg
->query_interval
= blobmsg_get_u32(cur
);
606 cfg
->flags
|= BRIDGE_OPT_QUERY_INTERVAL
;
609 if ((cur
= tb
[BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL
])) {
610 cfg
->query_response_interval
= blobmsg_get_u32(cur
);
611 cfg
->flags
|= BRIDGE_OPT_QUERY_RESPONSE_INTERVAL
;
614 if ((cur
= tb
[BRIDGE_ATTR_LAST_MEMBER_INTERVAL
])) {
615 cfg
->last_member_interval
= blobmsg_get_u32(cur
);
616 cfg
->flags
|= BRIDGE_OPT_LAST_MEMBER_INTERVAL
;
619 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
620 cfg
->ageing_time
= blobmsg_get_u32(cur
);
621 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
624 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
625 cfg
->hello_time
= blobmsg_get_u32(cur
);
626 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
629 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
630 cfg
->max_age
= blobmsg_get_u32(cur
);
631 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
634 if ((cur
= tb
[BRIDGE_ATTR_BRIDGE_EMPTY
]))
635 cfg
->bridge_empty
= blobmsg_get_bool(cur
);
639 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
641 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
642 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
643 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
645 struct bridge_state
*bst
;
647 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
648 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
650 bst
= container_of(dev
, struct bridge_state
, dev
);
651 attr
= blob_memdup(attr
);
653 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
654 blob_data(attr
), blob_len(attr
));
655 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
656 blob_data(attr
), blob_len(attr
));
658 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
659 device_init_settings(dev
, tb_dev
);
660 bridge_apply_settings(bst
, tb_br
);
662 if (bst
->config_data
) {
663 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
664 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
666 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
667 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
670 uci_blob_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
672 ret
= DEV_CONFIG_RESTART
;
674 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
675 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
678 uci_blob_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
679 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
680 ret
= DEV_CONFIG_RESTART
;
682 bridge_config_init(dev
);
685 free(bst
->config_data
);
686 bst
->config_data
= attr
;
691 bridge_retry_members(struct uloop_timeout
*timeout
)
693 struct bridge_state
*bst
= container_of(timeout
, struct bridge_state
, retry
);
694 struct bridge_member
*bm
;
697 vlist_for_each_element(&bst
->members
, bm
, node
) {
701 if (!bm
->dev
.dev
->present
)
706 bridge_enable_member(bm
);
710 static struct device
*
711 bridge_create(const char *name
, struct device_type
*devtype
,
712 struct blob_attr
*attr
)
714 struct bridge_state
*bst
;
715 struct device
*dev
= NULL
;
717 bst
= calloc(1, sizeof(*bst
));
722 device_init(dev
, devtype
, name
);
723 dev
->config_pending
= true;
724 bst
->retry
.cb
= bridge_retry_members
;
726 bst
->set_state
= dev
->set_state
;
727 dev
->set_state
= bridge_set_state
;
729 dev
->hotplug_ops
= &bridge_ops
;
731 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
732 bst
->members
.keep_old
= true;
733 bridge_reload(dev
, attr
);
738 static void __init
bridge_device_type_init(void)
740 device_type_add(&bridge_device_type
);