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
,
39 static const struct blobmsg_policy bridge_attrs
[__BRIDGE_ATTR_MAX
] = {
40 [BRIDGE_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
41 [BRIDGE_ATTR_STP
] = { "stp", BLOBMSG_TYPE_BOOL
},
42 [BRIDGE_ATTR_FORWARD_DELAY
] = { "forward_delay", BLOBMSG_TYPE_INT32
},
43 [BRIDGE_ATTR_PRIORITY
] = { "priority", BLOBMSG_TYPE_INT32
},
44 [BRIDGE_ATTR_AGEING_TIME
] = { "ageing_time", BLOBMSG_TYPE_INT32
},
45 [BRIDGE_ATTR_HELLO_TIME
] = { "hello_time", BLOBMSG_TYPE_INT32
},
46 [BRIDGE_ATTR_MAX_AGE
] = { "max_age", BLOBMSG_TYPE_INT32
},
47 [BRIDGE_ATTR_IGMP_SNOOP
] = { "igmp_snooping", BLOBMSG_TYPE_BOOL
},
48 [BRIDGE_ATTR_BRIDGE_EMPTY
] = { "bridge_empty", BLOBMSG_TYPE_BOOL
},
49 [BRIDGE_ATTR_MULTICAST_QUERIER
] = { "multicast_querier", BLOBMSG_TYPE_BOOL
},
52 static const struct uci_blob_param_info bridge_attr_info
[__BRIDGE_ATTR_MAX
] = {
53 [BRIDGE_ATTR_IFNAME
] = { .type
= BLOBMSG_TYPE_STRING
},
56 static const struct uci_blob_param_list bridge_attr_list
= {
57 .n_params
= __BRIDGE_ATTR_MAX
,
58 .params
= bridge_attrs
,
59 .info
= bridge_attr_info
,
62 .next
= { &device_attr_list
},
65 static struct device
*bridge_create(const char *name
, struct blob_attr
*attr
);
66 static void bridge_config_init(struct device
*dev
);
67 static void bridge_free(struct device
*dev
);
68 static void bridge_dump_info(struct device
*dev
, struct blob_buf
*b
);
70 bridge_reload(struct device
*dev
, struct blob_attr
*attr
);
72 const struct device_type bridge_device_type
= {
74 .config_params
= &bridge_attr_list
,
76 .create
= bridge_create
,
77 .config_init
= bridge_config_init
,
78 .reload
= bridge_reload
,
80 .dump_info
= bridge_dump_info
,
85 device_state_cb set_state
;
87 struct blob_attr
*config_data
;
88 struct bridge_config config
;
89 struct blob_attr
*ifnames
;
93 struct uloop_timeout retry
;
94 struct bridge_member
*primary_port
;
95 struct vlist_tree members
;
100 struct bridge_member
{
101 struct vlist_node node
;
102 struct bridge_state
*bst
;
103 struct device_user dev
;
109 bridge_reset_primary(struct bridge_state
*bst
)
111 struct bridge_member
*bm
;
113 if (!bst
->primary_port
&&
114 (bst
->dev
.settings
.flags
& DEV_OPT_MACADDR
))
117 bst
->primary_port
= NULL
;
118 bst
->dev
.settings
.flags
&= ~DEV_OPT_MACADDR
;
119 vlist_for_each_element(&bst
->members
, bm
, node
) {
125 bst
->primary_port
= bm
;
126 if (bm
->dev
.dev
->settings
.flags
& DEV_OPT_MACADDR
)
127 macaddr
= bm
->dev
.dev
->settings
.macaddr
;
129 macaddr
= bm
->dev
.dev
->orig_settings
.macaddr
;
130 memcpy(bst
->dev
.settings
.macaddr
, macaddr
, 6);
131 bst
->dev
.settings
.flags
|= DEV_OPT_MACADDR
;
137 bridge_disable_member(struct bridge_member
*bm
)
139 struct bridge_state
*bst
= bm
->bst
;
144 system_bridge_delif(&bst
->dev
, bm
->dev
.dev
);
145 device_release(&bm
->dev
);
147 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
153 bridge_enable_interface(struct bridge_state
*bst
)
160 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
169 bridge_disable_interface(struct bridge_state
*bst
)
174 system_bridge_delbr(&bst
->dev
);
179 bridge_enable_member(struct bridge_member
*bm
)
181 struct bridge_state
*bst
= bm
->bst
;
187 ret
= bridge_enable_interface(bst
);
191 /* Disable IPv6 for bridge members */
192 if (!(bm
->dev
.dev
->settings
.flags
& DEV_OPT_IPV6
)) {
193 bm
->dev
.dev
->settings
.ipv6
= 0;
194 bm
->dev
.dev
->settings
.flags
|= DEV_OPT_IPV6
;
197 ret
= device_claim(&bm
->dev
);
201 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
203 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
207 device_set_present(&bst
->dev
, true);
208 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
216 device_release(&bm
->dev
);
222 bridge_remove_member(struct bridge_member
*bm
)
224 struct bridge_state
*bst
= bm
->bst
;
229 if (bm
== bst
->primary_port
)
230 bridge_reset_primary(bst
);
233 bridge_disable_member(bm
);
236 bm
->bst
->n_present
--;
238 if (bst
->config
.bridge_empty
)
241 bst
->force_active
= false;
242 if (bst
->n_present
== 0)
243 device_set_present(&bst
->dev
, false);
247 bridge_free_member(struct bridge_member
*bm
)
249 struct device
*dev
= bm
->dev
.dev
;
251 bridge_remove_member(bm
);
252 device_remove_user(&bm
->dev
);
255 * When reloading the config and moving a device from one bridge to
256 * another, the other bridge may have tried to claim this device
257 * before it was removed here.
258 * Ensure that claiming the device is retried by toggling its present
262 device_set_present(dev
, false);
263 device_set_present(dev
, true);
270 bridge_check_retry(struct bridge_state
*bst
)
275 uloop_timeout_set(&bst
->retry
, 100);
279 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
281 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
282 struct bridge_state
*bst
= bm
->bst
;
286 assert(!bm
->present
);
291 if (bst
->n_present
== 1)
292 device_set_present(&bst
->dev
, true);
293 if (bst
->dev
.active
&& !bridge_enable_member(bm
)) {
295 * Adding a bridge member can overwrite the bridge mtu
296 * in the kernel, apply the bridge settings in case the
299 system_if_apply_settings(&bst
->dev
, &bst
->dev
.settings
,
304 case DEV_EVENT_REMOVE
:
306 vlist_delete(&bst
->members
, &bm
->node
);
311 bridge_remove_member(bm
);
320 bridge_set_down(struct bridge_state
*bst
)
322 struct bridge_member
*bm
;
324 bst
->set_state(&bst
->dev
, false);
326 vlist_for_each_element(&bst
->members
, bm
, node
)
327 bridge_disable_member(bm
);
329 bridge_disable_interface(bst
);
335 bridge_set_up(struct bridge_state
*bst
)
337 struct bridge_member
*bm
;
340 if (!bst
->n_present
) {
341 if (!bst
->force_active
)
344 ret
= bridge_enable_interface(bst
);
350 vlist_for_each_element(&bst
->members
, bm
, node
)
351 bridge_enable_member(bm
);
352 bridge_check_retry(bst
);
354 if (!bst
->force_active
&& !bst
->n_present
) {
355 /* initialization of all member interfaces failed */
356 bridge_disable_interface(bst
);
357 device_set_present(&bst
->dev
, false);
361 bridge_reset_primary(bst
);
362 ret
= bst
->set_state(&bst
->dev
, true);
364 bridge_set_down(bst
);
370 bridge_set_state(struct device
*dev
, bool up
)
372 struct bridge_state
*bst
;
374 bst
= container_of(dev
, struct bridge_state
, dev
);
377 return bridge_set_up(bst
);
379 return bridge_set_down(bst
);
382 static struct bridge_member
*
383 bridge_create_member(struct bridge_state
*bst
, struct device
*dev
, bool hotplug
)
385 struct bridge_member
*bm
;
387 bm
= calloc(1, sizeof(*bm
) + strlen(dev
->ifname
) + 1);
392 bm
->dev
.cb
= bridge_member_cb
;
393 bm
->dev
.hotplug
= hotplug
;
394 strcpy(bm
->name
, dev
->ifname
);
396 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
397 // Need to look up the bridge member again as the above
398 // created pointer will be freed in case the bridge member
400 bm
= vlist_find(&bst
->members
, dev
->ifname
, bm
, node
);
402 bm
->node
.version
= -1;
408 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
409 struct vlist_node
*node_old
)
411 struct bridge_member
*bm
;
415 bm
= container_of(node_new
, struct bridge_member
, node
);
424 device_add_user(&bm
->dev
, dev
);
429 bm
= container_of(node_old
, struct bridge_member
, node
);
430 bridge_free_member(bm
);
436 bridge_add_member(struct bridge_state
*bst
, const char *name
)
440 dev
= device_get(name
, true);
444 bridge_create_member(bst
, dev
, false);
448 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
450 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
452 bridge_create_member(bst
, member
, true);
458 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
460 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
461 struct bridge_member
*bm
;
463 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
465 return UBUS_STATUS_NOT_FOUND
;
467 vlist_delete(&bst
->members
, &bm
->node
);
472 bridge_hotplug_prepare(struct device
*dev
)
474 struct bridge_state
*bst
;
476 bst
= container_of(dev
, struct bridge_state
, dev
);
477 bst
->force_active
= true;
478 device_set_present(&bst
->dev
, true);
483 static const struct device_hotplug_ops bridge_ops
= {
484 .prepare
= bridge_hotplug_prepare
,
485 .add
= bridge_hotplug_add
,
486 .del
= bridge_hotplug_del
490 bridge_free(struct device
*dev
)
492 struct bridge_state
*bst
;
494 bst
= container_of(dev
, struct bridge_state
, dev
);
495 vlist_flush_all(&bst
->members
);
496 free(bst
->config_data
);
501 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
503 struct bridge_state
*bst
;
504 struct bridge_member
*bm
;
507 bst
= container_of(dev
, struct bridge_state
, dev
);
509 system_if_dump_info(dev
, b
);
510 list
= blobmsg_open_array(b
, "bridge-members");
512 vlist_for_each_element(&bst
->members
, bm
, node
)
513 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
515 blobmsg_close_array(b
, list
);
519 bridge_config_init(struct device
*dev
)
521 struct bridge_state
*bst
;
522 struct blob_attr
*cur
;
525 bst
= container_of(dev
, struct bridge_state
, dev
);
527 if (bst
->config
.bridge_empty
) {
528 bst
->force_active
= true;
529 device_set_present(&bst
->dev
, true);
533 vlist_update(&bst
->members
);
535 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
536 bridge_add_member(bst
, blobmsg_data(cur
));
539 vlist_flush(&bst
->members
);
540 bridge_check_retry(bst
);
544 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
546 struct bridge_config
*cfg
= &bst
->config
;
547 struct blob_attr
*cur
;
551 cfg
->forward_delay
= 2;
552 cfg
->igmp_snoop
= true;
553 cfg
->multicast_querier
= true;
554 cfg
->bridge_empty
= false;
555 cfg
->priority
= 0x7FFF;
557 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
558 cfg
->stp
= blobmsg_get_bool(cur
);
560 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
561 cfg
->forward_delay
= blobmsg_get_u32(cur
);
563 if ((cur
= tb
[BRIDGE_ATTR_PRIORITY
]))
564 cfg
->priority
= blobmsg_get_u32(cur
);
566 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
567 cfg
->multicast_querier
= cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
569 if ((cur
= tb
[BRIDGE_ATTR_MULTICAST_QUERIER
]))
570 cfg
->multicast_querier
= blobmsg_get_bool(cur
);
572 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
573 cfg
->ageing_time
= blobmsg_get_u32(cur
);
574 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
577 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
578 cfg
->hello_time
= blobmsg_get_u32(cur
);
579 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
582 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
583 cfg
->max_age
= blobmsg_get_u32(cur
);
584 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
587 if ((cur
= tb
[BRIDGE_ATTR_BRIDGE_EMPTY
]))
588 cfg
->bridge_empty
= blobmsg_get_bool(cur
);
592 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
594 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
595 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
596 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
598 struct bridge_state
*bst
;
600 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
601 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
603 bst
= container_of(dev
, struct bridge_state
, dev
);
604 attr
= blob_memdup(attr
);
606 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
607 blob_data(attr
), blob_len(attr
));
608 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
609 blob_data(attr
), blob_len(attr
));
611 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
612 device_init_settings(dev
, tb_dev
);
613 bridge_apply_settings(bst
, tb_br
);
615 if (bst
->config_data
) {
616 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
617 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
619 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
620 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
623 uci_blob_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
625 ret
= DEV_CONFIG_RESTART
;
627 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
628 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
631 uci_blob_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
632 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
633 ret
= DEV_CONFIG_RESTART
;
635 bridge_config_init(dev
);
638 free(bst
->config_data
);
639 bst
->config_data
= attr
;
644 bridge_retry_members(struct uloop_timeout
*timeout
)
646 struct bridge_state
*bst
= container_of(timeout
, struct bridge_state
, retry
);
647 struct bridge_member
*bm
;
650 vlist_for_each_element(&bst
->members
, bm
, node
) {
654 if (!bm
->dev
.dev
->present
)
659 bridge_enable_member(bm
);
663 static struct device
*
664 bridge_create(const char *name
, struct blob_attr
*attr
)
666 struct bridge_state
*bst
;
667 struct device
*dev
= NULL
;
669 bst
= calloc(1, sizeof(*bst
));
674 device_init(dev
, &bridge_device_type
, name
);
675 dev
->config_pending
= true;
676 bst
->retry
.cb
= bridge_retry_members
;
678 bst
->set_state
= dev
->set_state
;
679 dev
->set_state
= bridge_set_state
;
681 dev
->hotplug_ops
= &bridge_ops
;
683 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
684 bst
->members
.keep_old
= true;
685 bridge_reload(dev
, attr
);