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
,
40 static const struct blobmsg_policy bridge_attrs
[__BRIDGE_ATTR_MAX
] = {
41 [BRIDGE_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
42 [BRIDGE_ATTR_STP
] = { "stp", BLOBMSG_TYPE_BOOL
},
43 [BRIDGE_ATTR_FORWARD_DELAY
] = { "forward_delay", BLOBMSG_TYPE_INT32
},
44 [BRIDGE_ATTR_PRIORITY
] = { "priority", BLOBMSG_TYPE_INT32
},
45 [BRIDGE_ATTR_AGEING_TIME
] = { "ageing_time", BLOBMSG_TYPE_INT32
},
46 [BRIDGE_ATTR_HELLO_TIME
] = { "hello_time", BLOBMSG_TYPE_INT32
},
47 [BRIDGE_ATTR_MAX_AGE
] = { "max_age", BLOBMSG_TYPE_INT32
},
48 [BRIDGE_ATTR_IGMP_SNOOP
] = { "igmp_snooping", BLOBMSG_TYPE_BOOL
},
49 [BRIDGE_ATTR_BRIDGE_EMPTY
] = { "bridge_empty", BLOBMSG_TYPE_BOOL
},
50 [BRIDGE_ATTR_MULTICAST_QUERIER
] = { "multicast_querier", BLOBMSG_TYPE_BOOL
},
51 [BRIDGE_ATTR_HASH_MAX
] = { "hash_max", BLOBMSG_TYPE_INT32
},
54 static const struct uci_blob_param_info bridge_attr_info
[__BRIDGE_ATTR_MAX
] = {
55 [BRIDGE_ATTR_IFNAME
] = { .type
= BLOBMSG_TYPE_STRING
},
58 static const struct uci_blob_param_list bridge_attr_list
= {
59 .n_params
= __BRIDGE_ATTR_MAX
,
60 .params
= bridge_attrs
,
61 .info
= bridge_attr_info
,
64 .next
= { &device_attr_list
},
67 static struct device
*bridge_create(const char *name
, struct blob_attr
*attr
);
68 static void bridge_config_init(struct device
*dev
);
69 static void bridge_free(struct device
*dev
);
70 static void bridge_dump_info(struct device
*dev
, struct blob_buf
*b
);
72 bridge_reload(struct device
*dev
, struct blob_attr
*attr
);
74 const struct device_type bridge_device_type
= {
76 .config_params
= &bridge_attr_list
,
78 .create
= bridge_create
,
79 .config_init
= bridge_config_init
,
80 .reload
= bridge_reload
,
82 .dump_info
= bridge_dump_info
,
87 device_state_cb set_state
;
89 struct blob_attr
*config_data
;
90 struct bridge_config config
;
91 struct blob_attr
*ifnames
;
95 struct uloop_timeout retry
;
96 struct bridge_member
*primary_port
;
97 struct vlist_tree members
;
102 struct bridge_member
{
103 struct vlist_node node
;
104 struct bridge_state
*bst
;
105 struct device_user dev
;
111 bridge_reset_primary(struct bridge_state
*bst
)
113 struct bridge_member
*bm
;
115 if (!bst
->primary_port
&&
116 (bst
->dev
.settings
.flags
& DEV_OPT_MACADDR
))
119 bst
->primary_port
= NULL
;
120 bst
->dev
.settings
.flags
&= ~DEV_OPT_MACADDR
;
121 vlist_for_each_element(&bst
->members
, bm
, node
) {
127 bst
->primary_port
= bm
;
128 if (bm
->dev
.dev
->settings
.flags
& DEV_OPT_MACADDR
)
129 macaddr
= bm
->dev
.dev
->settings
.macaddr
;
131 macaddr
= bm
->dev
.dev
->orig_settings
.macaddr
;
132 memcpy(bst
->dev
.settings
.macaddr
, macaddr
, 6);
133 bst
->dev
.settings
.flags
|= DEV_OPT_MACADDR
;
139 bridge_disable_member(struct bridge_member
*bm
)
141 struct bridge_state
*bst
= bm
->bst
;
146 system_bridge_delif(&bst
->dev
, bm
->dev
.dev
);
147 device_release(&bm
->dev
);
149 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
155 bridge_enable_interface(struct bridge_state
*bst
)
162 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
171 bridge_disable_interface(struct bridge_state
*bst
)
176 system_bridge_delbr(&bst
->dev
);
181 bridge_enable_member(struct bridge_member
*bm
)
183 struct bridge_state
*bst
= bm
->bst
;
189 ret
= bridge_enable_interface(bst
);
193 /* Disable IPv6 for bridge members */
194 if (!(bm
->dev
.dev
->settings
.flags
& DEV_OPT_IPV6
)) {
195 bm
->dev
.dev
->settings
.ipv6
= 0;
196 bm
->dev
.dev
->settings
.flags
|= DEV_OPT_IPV6
;
199 ret
= device_claim(&bm
->dev
);
203 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
205 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
209 device_set_present(&bst
->dev
, true);
210 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
218 device_release(&bm
->dev
);
224 bridge_remove_member(struct bridge_member
*bm
)
226 struct bridge_state
*bst
= bm
->bst
;
231 if (bm
== bst
->primary_port
)
232 bridge_reset_primary(bst
);
235 bridge_disable_member(bm
);
238 bm
->bst
->n_present
--;
240 if (bst
->config
.bridge_empty
)
243 bst
->force_active
= false;
244 if (bst
->n_present
== 0)
245 device_set_present(&bst
->dev
, false);
249 bridge_free_member(struct bridge_member
*bm
)
251 struct device
*dev
= bm
->dev
.dev
;
253 bridge_remove_member(bm
);
254 device_remove_user(&bm
->dev
);
257 * When reloading the config and moving a device from one bridge to
258 * another, the other bridge may have tried to claim this device
259 * before it was removed here.
260 * Ensure that claiming the device is retried by toggling its present
264 device_set_present(dev
, false);
265 device_set_present(dev
, true);
272 bridge_check_retry(struct bridge_state
*bst
)
277 uloop_timeout_set(&bst
->retry
, 100);
281 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
283 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
284 struct bridge_state
*bst
= bm
->bst
;
288 assert(!bm
->present
);
293 if (bst
->n_present
== 1)
294 device_set_present(&bst
->dev
, true);
295 if (bst
->dev
.active
&& !bridge_enable_member(bm
)) {
297 * Adding a bridge member can overwrite the bridge mtu
298 * in the kernel, apply the bridge settings in case the
301 system_if_apply_settings(&bst
->dev
, &bst
->dev
.settings
,
302 DEV_OPT_MTU
| DEV_OPT_MTU6
);
306 case DEV_EVENT_REMOVE
:
308 vlist_delete(&bst
->members
, &bm
->node
);
313 bridge_remove_member(bm
);
322 bridge_set_down(struct bridge_state
*bst
)
324 struct bridge_member
*bm
;
326 bst
->set_state(&bst
->dev
, false);
328 vlist_for_each_element(&bst
->members
, bm
, node
)
329 bridge_disable_member(bm
);
331 bridge_disable_interface(bst
);
337 bridge_set_up(struct bridge_state
*bst
)
339 struct bridge_member
*bm
;
342 if (!bst
->n_present
) {
343 if (!bst
->force_active
)
346 ret
= bridge_enable_interface(bst
);
352 vlist_for_each_element(&bst
->members
, bm
, node
)
353 bridge_enable_member(bm
);
354 bridge_check_retry(bst
);
356 if (!bst
->force_active
&& !bst
->n_present
) {
357 /* initialization of all member interfaces failed */
358 bridge_disable_interface(bst
);
359 device_set_present(&bst
->dev
, false);
363 bridge_reset_primary(bst
);
364 ret
= bst
->set_state(&bst
->dev
, true);
366 bridge_set_down(bst
);
372 bridge_set_state(struct device
*dev
, bool up
)
374 struct bridge_state
*bst
;
376 bst
= container_of(dev
, struct bridge_state
, dev
);
379 return bridge_set_up(bst
);
381 return bridge_set_down(bst
);
384 static struct bridge_member
*
385 bridge_create_member(struct bridge_state
*bst
, struct device
*dev
, bool hotplug
)
387 struct bridge_member
*bm
;
389 bm
= calloc(1, sizeof(*bm
) + strlen(dev
->ifname
) + 1);
394 bm
->dev
.cb
= bridge_member_cb
;
395 bm
->dev
.hotplug
= hotplug
;
396 strcpy(bm
->name
, dev
->ifname
);
398 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
399 // Need to look up the bridge member again as the above
400 // created pointer will be freed in case the bridge member
402 bm
= vlist_find(&bst
->members
, dev
->ifname
, bm
, node
);
404 bm
->node
.version
= -1;
410 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
411 struct vlist_node
*node_old
)
413 struct bridge_member
*bm
;
417 bm
= container_of(node_new
, struct bridge_member
, node
);
426 device_add_user(&bm
->dev
, dev
);
431 bm
= container_of(node_old
, struct bridge_member
, node
);
432 bridge_free_member(bm
);
438 bridge_add_member(struct bridge_state
*bst
, const char *name
)
442 dev
= device_get(name
, true);
446 bridge_create_member(bst
, dev
, false);
450 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
452 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
454 bridge_create_member(bst
, member
, true);
460 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
462 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
463 struct bridge_member
*bm
;
465 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
467 return UBUS_STATUS_NOT_FOUND
;
469 vlist_delete(&bst
->members
, &bm
->node
);
474 bridge_hotplug_prepare(struct device
*dev
)
476 struct bridge_state
*bst
;
478 bst
= container_of(dev
, struct bridge_state
, dev
);
479 bst
->force_active
= true;
480 device_set_present(&bst
->dev
, true);
485 static const struct device_hotplug_ops bridge_ops
= {
486 .prepare
= bridge_hotplug_prepare
,
487 .add
= bridge_hotplug_add
,
488 .del
= bridge_hotplug_del
492 bridge_free(struct device
*dev
)
494 struct bridge_state
*bst
;
496 bst
= container_of(dev
, struct bridge_state
, dev
);
497 vlist_flush_all(&bst
->members
);
498 free(bst
->config_data
);
503 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
505 struct bridge_state
*bst
;
506 struct bridge_member
*bm
;
509 bst
= container_of(dev
, struct bridge_state
, dev
);
511 system_if_dump_info(dev
, b
);
512 list
= blobmsg_open_array(b
, "bridge-members");
514 vlist_for_each_element(&bst
->members
, bm
, node
)
515 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
517 blobmsg_close_array(b
, list
);
521 bridge_config_init(struct device
*dev
)
523 struct bridge_state
*bst
;
524 struct blob_attr
*cur
;
527 bst
= container_of(dev
, struct bridge_state
, dev
);
529 if (bst
->config
.bridge_empty
) {
530 bst
->force_active
= true;
531 device_set_present(&bst
->dev
, true);
535 vlist_update(&bst
->members
);
537 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
538 bridge_add_member(bst
, blobmsg_data(cur
));
541 vlist_flush(&bst
->members
);
542 bridge_check_retry(bst
);
546 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
548 struct bridge_config
*cfg
= &bst
->config
;
549 struct blob_attr
*cur
;
553 cfg
->forward_delay
= 2;
554 cfg
->igmp_snoop
= true;
555 cfg
->multicast_querier
= true;
557 cfg
->bridge_empty
= false;
558 cfg
->priority
= 0x7FFF;
560 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
561 cfg
->stp
= blobmsg_get_bool(cur
);
563 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
564 cfg
->forward_delay
= blobmsg_get_u32(cur
);
566 if ((cur
= tb
[BRIDGE_ATTR_PRIORITY
]))
567 cfg
->priority
= blobmsg_get_u32(cur
);
569 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
570 cfg
->multicast_querier
= cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
572 if ((cur
= tb
[BRIDGE_ATTR_MULTICAST_QUERIER
]))
573 cfg
->multicast_querier
= blobmsg_get_bool(cur
);
575 if ((cur
= tb
[BRIDGE_ATTR_HASH_MAX
]))
576 cfg
->hash_max
= blobmsg_get_u32(cur
);
578 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
579 cfg
->ageing_time
= blobmsg_get_u32(cur
);
580 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
583 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
584 cfg
->hello_time
= blobmsg_get_u32(cur
);
585 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
588 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
589 cfg
->max_age
= blobmsg_get_u32(cur
);
590 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
593 if ((cur
= tb
[BRIDGE_ATTR_BRIDGE_EMPTY
]))
594 cfg
->bridge_empty
= blobmsg_get_bool(cur
);
598 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
600 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
601 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
602 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
604 struct bridge_state
*bst
;
606 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
607 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
609 bst
= container_of(dev
, struct bridge_state
, dev
);
610 attr
= blob_memdup(attr
);
612 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
613 blob_data(attr
), blob_len(attr
));
614 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
615 blob_data(attr
), blob_len(attr
));
617 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
618 device_init_settings(dev
, tb_dev
);
619 bridge_apply_settings(bst
, tb_br
);
621 if (bst
->config_data
) {
622 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
623 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
625 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
626 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
629 uci_blob_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
631 ret
= DEV_CONFIG_RESTART
;
633 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
634 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
637 uci_blob_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
638 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
639 ret
= DEV_CONFIG_RESTART
;
641 bridge_config_init(dev
);
644 free(bst
->config_data
);
645 bst
->config_data
= attr
;
650 bridge_retry_members(struct uloop_timeout
*timeout
)
652 struct bridge_state
*bst
= container_of(timeout
, struct bridge_state
, retry
);
653 struct bridge_member
*bm
;
656 vlist_for_each_element(&bst
->members
, bm
, node
) {
660 if (!bm
->dev
.dev
->present
)
665 bridge_enable_member(bm
);
669 static struct device
*
670 bridge_create(const char *name
, struct blob_attr
*attr
)
672 struct bridge_state
*bst
;
673 struct device
*dev
= NULL
;
675 bst
= calloc(1, sizeof(*bst
));
680 device_init(dev
, &bridge_device_type
, name
);
681 dev
->config_pending
= true;
682 bst
->retry
.cb
= bridge_retry_members
;
684 bst
->set_state
= dev
->set_state
;
685 dev
->set_state
= bridge_set_state
;
687 dev
->hotplug_ops
= &bridge_ops
;
689 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
690 bst
->members
.keep_old
= true;
691 bridge_reload(dev
, attr
);