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
,
29 BRIDGE_ATTR_IGMP_SNOOP
,
30 BRIDGE_ATTR_AGEING_TIME
,
31 BRIDGE_ATTR_HELLO_TIME
,
36 static const struct blobmsg_policy bridge_attrs
[__BRIDGE_ATTR_MAX
] = {
37 [BRIDGE_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
38 [BRIDGE_ATTR_STP
] = { "stp", BLOBMSG_TYPE_BOOL
},
39 [BRIDGE_ATTR_FORWARD_DELAY
] = { "forward_delay", BLOBMSG_TYPE_INT32
},
40 [BRIDGE_ATTR_AGEING_TIME
] = { "ageing_time", BLOBMSG_TYPE_INT32
},
41 [BRIDGE_ATTR_HELLO_TIME
] = { "hello_time", BLOBMSG_TYPE_INT32
},
42 [BRIDGE_ATTR_MAX_AGE
] = { "max_age", BLOBMSG_TYPE_INT32
},
43 [BRIDGE_ATTR_IGMP_SNOOP
] = { "igmp_snooping", BLOBMSG_TYPE_BOOL
},
46 static const union config_param_info bridge_attr_info
[__BRIDGE_ATTR_MAX
] = {
47 [BRIDGE_ATTR_IFNAME
] = { .type
= BLOBMSG_TYPE_STRING
},
50 static const struct config_param_list bridge_attr_list
= {
51 .n_params
= __BRIDGE_ATTR_MAX
,
52 .params
= bridge_attrs
,
53 .info
= bridge_attr_info
,
56 .next
= { &device_attr_list
},
59 static struct device
*bridge_create(const char *name
, struct blob_attr
*attr
);
60 static void bridge_config_init(struct device
*dev
);
61 static void bridge_free(struct device
*dev
);
62 static void bridge_dump_info(struct device
*dev
, struct blob_buf
*b
);
64 bridge_reload(struct device
*dev
, struct blob_attr
*attr
);
66 const struct device_type bridge_device_type
= {
68 .config_params
= &bridge_attr_list
,
70 .create
= bridge_create
,
71 .config_init
= bridge_config_init
,
72 .reload
= bridge_reload
,
74 .dump_info
= bridge_dump_info
,
79 device_state_cb set_state
;
81 struct blob_attr
*config_data
;
82 struct bridge_config config
;
83 struct blob_attr
*ifnames
;
87 struct bridge_member
*primary_port
;
88 struct vlist_tree members
;
92 struct bridge_member
{
93 struct vlist_node node
;
94 struct bridge_state
*bst
;
95 struct device_user dev
;
101 bridge_reset_primary(struct bridge_state
*bst
)
103 struct bridge_member
*bm
;
105 if (!bst
->primary_port
&&
106 (bst
->dev
.settings
.flags
& DEV_OPT_MACADDR
))
109 bst
->primary_port
= NULL
;
110 bst
->dev
.settings
.flags
&= ~DEV_OPT_MACADDR
;
111 vlist_for_each_element(&bst
->members
, bm
, node
) {
117 bst
->primary_port
= bm
;
118 if (bm
->dev
.dev
->settings
.flags
& DEV_OPT_MACADDR
)
119 macaddr
= bm
->dev
.dev
->settings
.macaddr
;
121 macaddr
= bm
->dev
.dev
->orig_settings
.macaddr
;
122 memcpy(bst
->dev
.settings
.macaddr
, macaddr
, 6);
123 bst
->dev
.settings
.flags
|= DEV_OPT_MACADDR
;
129 bridge_disable_member(struct bridge_member
*bm
)
131 struct bridge_state
*bst
= bm
->bst
;
136 system_bridge_delif(&bst
->dev
, bm
->dev
.dev
);
137 device_release(&bm
->dev
);
143 bridge_enable_member(struct bridge_member
*bm
)
145 struct bridge_state
*bst
= bm
->bst
;
151 ret
= device_claim(&bm
->dev
);
155 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
157 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
170 bridge_remove_member(struct bridge_member
*bm
)
172 struct bridge_state
*bst
= bm
->bst
;
177 if (bm
== bst
->primary_port
);
178 bridge_reset_primary(bst
);
181 bridge_disable_member(bm
);
184 bm
->bst
->n_present
--;
186 bst
->force_active
= false;
187 if (bst
->n_present
== 0)
188 device_set_present(&bst
->dev
, false);
192 bridge_free_member(struct bridge_member
*bm
)
194 struct device
*dev
= bm
->dev
.dev
;
196 bridge_remove_member(bm
);
197 device_remove_user(&bm
->dev
);
200 * When reloading the config and moving a device from one bridge to
201 * another, the other bridge may have tried to claim this device
202 * before it was removed here.
203 * Ensure that claiming the device is retried by toggling its present
207 device_set_present(dev
, false);
208 device_set_present(dev
, true);
215 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
217 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
218 struct bridge_state
*bst
= bm
->bst
;
222 assert(!bm
->present
);
228 bridge_enable_member(bm
);
229 else if (bst
->n_present
== 1)
230 device_set_present(&bst
->dev
, true);
233 case DEV_EVENT_REMOVE
:
235 vlist_delete(&bst
->members
, &bm
->node
);
240 bridge_remove_member(bm
);
249 bridge_set_down(struct bridge_state
*bst
)
251 struct bridge_member
*bm
;
253 bst
->set_state(&bst
->dev
, false);
255 vlist_for_each_element(&bst
->members
, bm
, node
)
256 bridge_disable_member(bm
);
258 system_bridge_delbr(&bst
->dev
);
264 bridge_set_up(struct bridge_state
*bst
)
266 struct bridge_member
*bm
;
269 if (!bst
->force_active
&& !bst
->n_present
)
272 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
276 vlist_for_each_element(&bst
->members
, bm
, node
)
277 bridge_enable_member(bm
);
279 if (!bst
->force_active
&& !bst
->n_present
) {
280 /* initialization of all member interfaces failed */
281 system_bridge_delbr(&bst
->dev
);
282 device_set_present(&bst
->dev
, false);
286 bridge_reset_primary(bst
);
287 ret
= bst
->set_state(&bst
->dev
, true);
289 bridge_set_down(bst
);
296 bridge_set_state(struct device
*dev
, bool up
)
298 struct bridge_state
*bst
;
300 bst
= container_of(dev
, struct bridge_state
, dev
);
303 return bridge_set_up(bst
);
305 return bridge_set_down(bst
);
308 static struct bridge_member
*
309 bridge_create_member(struct bridge_state
*bst
, struct device
*dev
, bool hotplug
)
311 struct bridge_member
*bm
;
313 bm
= calloc(1, sizeof(*bm
) + strlen(dev
->ifname
) + 1);
315 bm
->dev
.cb
= bridge_member_cb
;
316 bm
->dev
.hotplug
= hotplug
;
317 strcpy(bm
->name
, dev
->ifname
);
319 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
321 bm
->node
.version
= -1;
327 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
328 struct vlist_node
*node_old
)
330 struct bridge_member
*bm
;
334 bm
= container_of(node_new
, struct bridge_member
, node
);
343 device_add_user(&bm
->dev
, dev
);
348 bm
= container_of(node_old
, struct bridge_member
, node
);
349 bridge_free_member(bm
);
355 bridge_add_member(struct bridge_state
*bst
, const char *name
)
359 dev
= device_get(name
, true);
363 bridge_create_member(bst
, dev
, false);
367 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
369 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
371 bridge_create_member(bst
, member
, true);
377 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
379 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
380 struct bridge_member
*bm
;
382 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
384 return UBUS_STATUS_NOT_FOUND
;
386 vlist_delete(&bst
->members
, &bm
->node
);
391 bridge_hotplug_prepare(struct device
*dev
)
393 struct bridge_state
*bst
;
395 bst
= container_of(dev
, struct bridge_state
, dev
);
396 bst
->force_active
= true;
397 device_set_present(&bst
->dev
, true);
402 static const struct device_hotplug_ops bridge_ops
= {
403 .prepare
= bridge_hotplug_prepare
,
404 .add
= bridge_hotplug_add
,
405 .del
= bridge_hotplug_del
409 bridge_free(struct device
*dev
)
411 struct bridge_state
*bst
;
413 bst
= container_of(dev
, struct bridge_state
, dev
);
414 vlist_flush_all(&bst
->members
);
419 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
421 struct bridge_state
*bst
;
422 struct bridge_member
*bm
;
425 bst
= container_of(dev
, struct bridge_state
, dev
);
427 system_if_dump_info(dev
, b
);
428 list
= blobmsg_open_array(b
, "bridge-members");
430 vlist_for_each_element(&bst
->members
, bm
, node
)
431 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
433 blobmsg_close_array(b
, list
);
437 bridge_config_init(struct device
*dev
)
439 struct bridge_state
*bst
;
440 struct blob_attr
*cur
;
443 bst
= container_of(dev
, struct bridge_state
, dev
);
448 vlist_update(&bst
->members
);
449 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
450 bridge_add_member(bst
, blobmsg_data(cur
));
452 vlist_flush(&bst
->members
);
456 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
458 struct bridge_config
*cfg
= &bst
->config
;
459 struct blob_attr
*cur
;
463 cfg
->forward_delay
= 2;
464 cfg
->igmp_snoop
= true;
466 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
467 cfg
->stp
= blobmsg_get_bool(cur
);
469 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
470 cfg
->forward_delay
= blobmsg_get_u32(cur
);
472 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
473 cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
475 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
476 cfg
->ageing_time
= blobmsg_get_u32(cur
);
477 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
480 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
481 cfg
->hello_time
= blobmsg_get_u32(cur
);
482 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
485 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
486 cfg
->max_age
= blobmsg_get_u32(cur
);
487 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
492 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
494 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
495 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
496 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
498 struct bridge_state
*bst
;
500 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
501 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
503 bst
= container_of(dev
, struct bridge_state
, dev
);
505 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
506 blob_data(attr
), blob_len(attr
));
507 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
508 blob_data(attr
), blob_len(attr
));
510 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
511 device_init_settings(dev
, tb_dev
);
512 bridge_apply_settings(bst
, tb_br
);
514 if (bst
->config_data
) {
515 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
516 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
518 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
519 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
522 config_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
523 if (diff
& ~(1 << DEV_ATTR_IFNAME
))
524 ret
= DEV_CONFIG_RESTART
;
526 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
527 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
530 config_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
531 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
532 ret
= DEV_CONFIG_RESTART
;
534 bridge_config_init(dev
);
537 bst
->config_data
= attr
;
541 static struct device
*
542 bridge_create(const char *name
, struct blob_attr
*attr
)
544 struct bridge_state
*bst
;
545 struct device
*dev
= NULL
;
547 bst
= calloc(1, sizeof(*bst
));
552 device_init(dev
, &bridge_device_type
, name
);
553 dev
->config_pending
= true;
555 bst
->set_state
= dev
->set_state
;
556 dev
->set_state
= bridge_set_state
;
558 dev
->hotplug_ops
= &bridge_ops
;
560 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
561 bst
->members
.keep_old
= true;
562 bridge_reload(dev
, attr
);