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
,
38 static const struct blobmsg_policy bridge_attrs
[__BRIDGE_ATTR_MAX
] = {
39 [BRIDGE_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
40 [BRIDGE_ATTR_STP
] = { "stp", BLOBMSG_TYPE_BOOL
},
41 [BRIDGE_ATTR_FORWARD_DELAY
] = { "forward_delay", BLOBMSG_TYPE_INT32
},
42 [BRIDGE_ATTR_PRIORITY
] = { "priority", BLOBMSG_TYPE_INT32
},
43 [BRIDGE_ATTR_AGEING_TIME
] = { "ageing_time", BLOBMSG_TYPE_INT32
},
44 [BRIDGE_ATTR_HELLO_TIME
] = { "hello_time", BLOBMSG_TYPE_INT32
},
45 [BRIDGE_ATTR_MAX_AGE
] = { "max_age", BLOBMSG_TYPE_INT32
},
46 [BRIDGE_ATTR_IGMP_SNOOP
] = { "igmp_snooping", BLOBMSG_TYPE_BOOL
},
47 [BRIDGE_ATTR_BRIDGE_EMPTY
] = { "bridge_empty", BLOBMSG_TYPE_BOOL
},
50 static const struct uci_blob_param_info bridge_attr_info
[__BRIDGE_ATTR_MAX
] = {
51 [BRIDGE_ATTR_IFNAME
] = { .type
= BLOBMSG_TYPE_STRING
},
54 static const struct uci_blob_param_list bridge_attr_list
= {
55 .n_params
= __BRIDGE_ATTR_MAX
,
56 .params
= bridge_attrs
,
57 .info
= bridge_attr_info
,
60 .next
= { &device_attr_list
},
63 static struct device
*bridge_create(const char *name
, struct blob_attr
*attr
);
64 static void bridge_config_init(struct device
*dev
);
65 static void bridge_free(struct device
*dev
);
66 static void bridge_dump_info(struct device
*dev
, struct blob_buf
*b
);
68 bridge_reload(struct device
*dev
, struct blob_attr
*attr
);
70 const struct device_type bridge_device_type
= {
72 .config_params
= &bridge_attr_list
,
74 .create
= bridge_create
,
75 .config_init
= bridge_config_init
,
76 .reload
= bridge_reload
,
78 .dump_info
= bridge_dump_info
,
83 device_state_cb set_state
;
85 struct blob_attr
*config_data
;
86 struct bridge_config config
;
87 struct blob_attr
*ifnames
;
91 struct bridge_member
*primary_port
;
92 struct vlist_tree members
;
96 struct bridge_member
{
97 struct vlist_node node
;
98 struct bridge_state
*bst
;
99 struct device_user dev
;
105 bridge_reset_primary(struct bridge_state
*bst
)
107 struct bridge_member
*bm
;
109 if (!bst
->primary_port
&&
110 (bst
->dev
.settings
.flags
& DEV_OPT_MACADDR
))
113 bst
->primary_port
= NULL
;
114 bst
->dev
.settings
.flags
&= ~DEV_OPT_MACADDR
;
115 vlist_for_each_element(&bst
->members
, bm
, node
) {
121 bst
->primary_port
= bm
;
122 if (bm
->dev
.dev
->settings
.flags
& DEV_OPT_MACADDR
)
123 macaddr
= bm
->dev
.dev
->settings
.macaddr
;
125 macaddr
= bm
->dev
.dev
->orig_settings
.macaddr
;
126 memcpy(bst
->dev
.settings
.macaddr
, macaddr
, 6);
127 bst
->dev
.settings
.flags
|= DEV_OPT_MACADDR
;
133 bridge_disable_member(struct bridge_member
*bm
)
135 struct bridge_state
*bst
= bm
->bst
;
140 system_bridge_delif(&bst
->dev
, bm
->dev
.dev
);
141 device_release(&bm
->dev
);
143 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
149 bridge_enable_member(struct bridge_member
*bm
)
151 struct bridge_state
*bst
= bm
->bst
;
157 /* Disable IPv6 for bridge members */
158 if (!(bm
->dev
.dev
->settings
.flags
& DEV_OPT_IPV6
)) {
159 bm
->dev
.dev
->settings
.ipv6
= 0;
160 bm
->dev
.dev
->settings
.flags
|= DEV_OPT_IPV6
;
163 ret
= device_claim(&bm
->dev
);
167 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
169 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
173 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
184 bridge_remove_member(struct bridge_member
*bm
)
186 struct bridge_state
*bst
= bm
->bst
;
191 if (bm
== bst
->primary_port
)
192 bridge_reset_primary(bst
);
195 bridge_disable_member(bm
);
198 bm
->bst
->n_present
--;
200 if (bst
->config
.bridge_empty
)
203 bst
->force_active
= false;
204 if (bst
->n_present
== 0)
205 device_set_present(&bst
->dev
, false);
209 bridge_free_member(struct bridge_member
*bm
)
211 struct device
*dev
= bm
->dev
.dev
;
213 bridge_remove_member(bm
);
214 device_remove_user(&bm
->dev
);
217 * When reloading the config and moving a device from one bridge to
218 * another, the other bridge may have tried to claim this device
219 * before it was removed here.
220 * Ensure that claiming the device is retried by toggling its present
224 device_set_present(dev
, false);
225 device_set_present(dev
, true);
232 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
234 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
235 struct bridge_state
*bst
= bm
->bst
;
239 assert(!bm
->present
);
244 if (bst
->n_present
== 1)
245 device_set_present(&bst
->dev
, true);
246 if (bst
->dev
.active
&& !bridge_enable_member(bm
)) {
248 * Adding a bridge member can overwrite the bridge mtu
249 * in the kernel, apply the bridge settings in case the
252 system_if_apply_settings(&bst
->dev
, &bst
->dev
.settings
,
257 case DEV_EVENT_REMOVE
:
259 vlist_delete(&bst
->members
, &bm
->node
);
264 bridge_remove_member(bm
);
273 bridge_set_down(struct bridge_state
*bst
)
275 struct bridge_member
*bm
;
277 bst
->set_state(&bst
->dev
, false);
279 vlist_for_each_element(&bst
->members
, bm
, node
)
280 bridge_disable_member(bm
);
282 system_bridge_delbr(&bst
->dev
);
288 bridge_set_up(struct bridge_state
*bst
)
290 struct bridge_member
*bm
;
293 if (!bst
->force_active
&& !bst
->n_present
)
296 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
300 vlist_for_each_element(&bst
->members
, bm
, node
)
301 bridge_enable_member(bm
);
303 if (!bst
->force_active
&& !bst
->n_present
) {
304 /* initialization of all member interfaces failed */
305 system_bridge_delbr(&bst
->dev
);
306 device_set_present(&bst
->dev
, false);
310 bridge_reset_primary(bst
);
311 ret
= bst
->set_state(&bst
->dev
, true);
313 bridge_set_down(bst
);
320 bridge_set_state(struct device
*dev
, bool up
)
322 struct bridge_state
*bst
;
324 bst
= container_of(dev
, struct bridge_state
, dev
);
327 return bridge_set_up(bst
);
329 return bridge_set_down(bst
);
332 static struct bridge_member
*
333 bridge_create_member(struct bridge_state
*bst
, struct device
*dev
, bool hotplug
)
335 struct bridge_member
*bm
;
337 bm
= calloc(1, sizeof(*bm
) + strlen(dev
->ifname
) + 1);
342 bm
->dev
.cb
= bridge_member_cb
;
343 bm
->dev
.hotplug
= hotplug
;
344 strcpy(bm
->name
, dev
->ifname
);
346 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
347 // Need to look up the bridge member again as the above
348 // created pointer will be freed in case the bridge member
350 bm
= vlist_find(&bst
->members
, dev
->ifname
, bm
, node
);
352 bm
->node
.version
= -1;
358 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
359 struct vlist_node
*node_old
)
361 struct bridge_member
*bm
;
365 bm
= container_of(node_new
, struct bridge_member
, node
);
374 device_add_user(&bm
->dev
, dev
);
379 bm
= container_of(node_old
, struct bridge_member
, node
);
380 bridge_free_member(bm
);
386 bridge_add_member(struct bridge_state
*bst
, const char *name
)
390 dev
= device_get(name
, true);
394 bridge_create_member(bst
, dev
, false);
398 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
400 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
402 bridge_create_member(bst
, member
, true);
408 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
410 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
411 struct bridge_member
*bm
;
413 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
415 return UBUS_STATUS_NOT_FOUND
;
417 vlist_delete(&bst
->members
, &bm
->node
);
422 bridge_hotplug_prepare(struct device
*dev
)
424 struct bridge_state
*bst
;
426 bst
= container_of(dev
, struct bridge_state
, dev
);
427 bst
->force_active
= true;
428 device_set_present(&bst
->dev
, true);
433 static const struct device_hotplug_ops bridge_ops
= {
434 .prepare
= bridge_hotplug_prepare
,
435 .add
= bridge_hotplug_add
,
436 .del
= bridge_hotplug_del
440 bridge_free(struct device
*dev
)
442 struct bridge_state
*bst
;
444 bst
= container_of(dev
, struct bridge_state
, dev
);
445 vlist_flush_all(&bst
->members
);
450 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
452 struct bridge_state
*bst
;
453 struct bridge_member
*bm
;
456 bst
= container_of(dev
, struct bridge_state
, dev
);
458 system_if_dump_info(dev
, b
);
459 list
= blobmsg_open_array(b
, "bridge-members");
461 vlist_for_each_element(&bst
->members
, bm
, node
)
462 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
464 blobmsg_close_array(b
, list
);
468 bridge_config_init(struct device
*dev
)
470 struct bridge_state
*bst
;
471 struct blob_attr
*cur
;
474 bst
= container_of(dev
, struct bridge_state
, dev
);
476 if (bst
->config
.bridge_empty
) {
477 bst
->force_active
= true;
478 device_set_present(&bst
->dev
, true);
481 vlist_update(&bst
->members
);
483 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
484 bridge_add_member(bst
, blobmsg_data(cur
));
487 vlist_flush(&bst
->members
);
491 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
493 struct bridge_config
*cfg
= &bst
->config
;
494 struct blob_attr
*cur
;
498 cfg
->forward_delay
= 2;
499 cfg
->igmp_snoop
= true;
500 cfg
->bridge_empty
= false;
501 cfg
->priority
= 0x7FFF;
503 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
504 cfg
->stp
= blobmsg_get_bool(cur
);
506 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
507 cfg
->forward_delay
= blobmsg_get_u32(cur
);
509 if ((cur
= tb
[BRIDGE_ATTR_PRIORITY
]))
510 cfg
->priority
= blobmsg_get_u32(cur
);
512 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
513 cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
515 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
516 cfg
->ageing_time
= blobmsg_get_u32(cur
);
517 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
520 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
521 cfg
->hello_time
= blobmsg_get_u32(cur
);
522 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
525 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
526 cfg
->max_age
= blobmsg_get_u32(cur
);
527 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
530 if ((cur
= tb
[BRIDGE_ATTR_BRIDGE_EMPTY
]))
531 cfg
->bridge_empty
= blobmsg_get_bool(cur
);
535 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
537 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
538 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
539 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
541 struct bridge_state
*bst
;
543 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
544 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
546 bst
= container_of(dev
, struct bridge_state
, dev
);
548 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
549 blob_data(attr
), blob_len(attr
));
550 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
551 blob_data(attr
), blob_len(attr
));
553 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
554 device_init_settings(dev
, tb_dev
);
555 bridge_apply_settings(bst
, tb_br
);
557 if (bst
->config_data
) {
558 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
559 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
561 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
562 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
565 uci_blob_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
566 if (diff
& ~(1 << DEV_ATTR_IFNAME
))
567 ret
= DEV_CONFIG_RESTART
;
569 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
570 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
573 uci_blob_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
574 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
575 ret
= DEV_CONFIG_RESTART
;
577 bridge_config_init(dev
);
580 bst
->config_data
= attr
;
584 static struct device
*
585 bridge_create(const char *name
, struct blob_attr
*attr
)
587 struct bridge_state
*bst
;
588 struct device
*dev
= NULL
;
590 bst
= calloc(1, sizeof(*bst
));
595 device_init(dev
, &bridge_device_type
, name
);
596 dev
->config_pending
= true;
598 bst
->set_state
= dev
->set_state
;
599 dev
->set_state
= bridge_set_state
;
601 dev
->hotplug_ops
= &bridge_ops
;
603 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
604 bst
->members
.keep_old
= true;
605 bridge_reload(dev
, attr
);