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 uloop_timeout retry
;
92 struct bridge_member
*primary_port
;
93 struct vlist_tree members
;
98 struct bridge_member
{
99 struct vlist_node node
;
100 struct bridge_state
*bst
;
101 struct device_user dev
;
107 bridge_reset_primary(struct bridge_state
*bst
)
109 struct bridge_member
*bm
;
111 if (!bst
->primary_port
&&
112 (bst
->dev
.settings
.flags
& DEV_OPT_MACADDR
))
115 bst
->primary_port
= NULL
;
116 bst
->dev
.settings
.flags
&= ~DEV_OPT_MACADDR
;
117 vlist_for_each_element(&bst
->members
, bm
, node
) {
123 bst
->primary_port
= bm
;
124 if (bm
->dev
.dev
->settings
.flags
& DEV_OPT_MACADDR
)
125 macaddr
= bm
->dev
.dev
->settings
.macaddr
;
127 macaddr
= bm
->dev
.dev
->orig_settings
.macaddr
;
128 memcpy(bst
->dev
.settings
.macaddr
, macaddr
, 6);
129 bst
->dev
.settings
.flags
|= DEV_OPT_MACADDR
;
135 bridge_disable_member(struct bridge_member
*bm
)
137 struct bridge_state
*bst
= bm
->bst
;
142 system_bridge_delif(&bst
->dev
, bm
->dev
.dev
);
143 device_release(&bm
->dev
);
145 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
151 bridge_enable_member(struct bridge_member
*bm
)
153 struct bridge_state
*bst
= bm
->bst
;
159 /* Disable IPv6 for bridge members */
160 if (!(bm
->dev
.dev
->settings
.flags
& DEV_OPT_IPV6
)) {
161 bm
->dev
.dev
->settings
.ipv6
= 0;
162 bm
->dev
.dev
->settings
.flags
|= DEV_OPT_IPV6
;
165 ret
= device_claim(&bm
->dev
);
169 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
171 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
175 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
183 device_release(&bm
->dev
);
189 bridge_remove_member(struct bridge_member
*bm
)
191 struct bridge_state
*bst
= bm
->bst
;
196 if (bm
== bst
->primary_port
)
197 bridge_reset_primary(bst
);
200 bridge_disable_member(bm
);
203 bm
->bst
->n_present
--;
205 if (bst
->config
.bridge_empty
)
208 bst
->force_active
= false;
209 if (bst
->n_present
== 0)
210 device_set_present(&bst
->dev
, false);
214 bridge_free_member(struct bridge_member
*bm
)
216 struct device
*dev
= bm
->dev
.dev
;
218 bridge_remove_member(bm
);
219 device_remove_user(&bm
->dev
);
222 * When reloading the config and moving a device from one bridge to
223 * another, the other bridge may have tried to claim this device
224 * before it was removed here.
225 * Ensure that claiming the device is retried by toggling its present
229 device_set_present(dev
, false);
230 device_set_present(dev
, true);
237 bridge_check_retry(struct bridge_state
*bst
)
242 uloop_timeout_set(&bst
->retry
, 100);
246 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
248 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
249 struct bridge_state
*bst
= bm
->bst
;
253 assert(!bm
->present
);
258 if (bst
->n_present
== 1)
259 device_set_present(&bst
->dev
, true);
260 if (bst
->dev
.active
&& !bridge_enable_member(bm
)) {
262 * Adding a bridge member can overwrite the bridge mtu
263 * in the kernel, apply the bridge settings in case the
266 system_if_apply_settings(&bst
->dev
, &bst
->dev
.settings
,
271 case DEV_EVENT_REMOVE
:
273 vlist_delete(&bst
->members
, &bm
->node
);
278 bridge_remove_member(bm
);
287 bridge_set_down(struct bridge_state
*bst
)
289 struct bridge_member
*bm
;
291 bst
->set_state(&bst
->dev
, false);
293 vlist_for_each_element(&bst
->members
, bm
, node
)
294 bridge_disable_member(bm
);
296 system_bridge_delbr(&bst
->dev
);
302 bridge_set_up(struct bridge_state
*bst
)
304 struct bridge_member
*bm
;
307 if (!bst
->force_active
&& !bst
->n_present
)
310 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
315 vlist_for_each_element(&bst
->members
, bm
, node
)
316 bridge_enable_member(bm
);
317 bridge_check_retry(bst
);
319 if (!bst
->force_active
&& !bst
->n_present
) {
320 /* initialization of all member interfaces failed */
321 system_bridge_delbr(&bst
->dev
);
322 device_set_present(&bst
->dev
, false);
326 bridge_reset_primary(bst
);
327 ret
= bst
->set_state(&bst
->dev
, true);
329 bridge_set_down(bst
);
336 bridge_set_state(struct device
*dev
, bool up
)
338 struct bridge_state
*bst
;
340 bst
= container_of(dev
, struct bridge_state
, dev
);
343 return bridge_set_up(bst
);
345 return bridge_set_down(bst
);
348 static struct bridge_member
*
349 bridge_create_member(struct bridge_state
*bst
, struct device
*dev
, bool hotplug
)
351 struct bridge_member
*bm
;
353 bm
= calloc(1, sizeof(*bm
) + strlen(dev
->ifname
) + 1);
358 bm
->dev
.cb
= bridge_member_cb
;
359 bm
->dev
.hotplug
= hotplug
;
360 strcpy(bm
->name
, dev
->ifname
);
362 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
363 // Need to look up the bridge member again as the above
364 // created pointer will be freed in case the bridge member
366 bm
= vlist_find(&bst
->members
, dev
->ifname
, bm
, node
);
368 bm
->node
.version
= -1;
374 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
375 struct vlist_node
*node_old
)
377 struct bridge_member
*bm
;
381 bm
= container_of(node_new
, struct bridge_member
, node
);
390 device_add_user(&bm
->dev
, dev
);
395 bm
= container_of(node_old
, struct bridge_member
, node
);
396 bridge_free_member(bm
);
402 bridge_add_member(struct bridge_state
*bst
, const char *name
)
406 dev
= device_get(name
, true);
410 bridge_create_member(bst
, dev
, false);
414 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
416 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
418 bridge_create_member(bst
, member
, true);
424 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
426 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
427 struct bridge_member
*bm
;
429 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
431 return UBUS_STATUS_NOT_FOUND
;
433 vlist_delete(&bst
->members
, &bm
->node
);
438 bridge_hotplug_prepare(struct device
*dev
)
440 struct bridge_state
*bst
;
442 bst
= container_of(dev
, struct bridge_state
, dev
);
443 bst
->force_active
= true;
444 device_set_present(&bst
->dev
, true);
449 static const struct device_hotplug_ops bridge_ops
= {
450 .prepare
= bridge_hotplug_prepare
,
451 .add
= bridge_hotplug_add
,
452 .del
= bridge_hotplug_del
456 bridge_free(struct device
*dev
)
458 struct bridge_state
*bst
;
460 bst
= container_of(dev
, struct bridge_state
, dev
);
461 vlist_flush_all(&bst
->members
);
466 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
468 struct bridge_state
*bst
;
469 struct bridge_member
*bm
;
472 bst
= container_of(dev
, struct bridge_state
, dev
);
474 system_if_dump_info(dev
, b
);
475 list
= blobmsg_open_array(b
, "bridge-members");
477 vlist_for_each_element(&bst
->members
, bm
, node
)
478 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
480 blobmsg_close_array(b
, list
);
484 bridge_config_init(struct device
*dev
)
486 struct bridge_state
*bst
;
487 struct blob_attr
*cur
;
490 bst
= container_of(dev
, struct bridge_state
, dev
);
492 if (bst
->config
.bridge_empty
) {
493 bst
->force_active
= true;
494 device_set_present(&bst
->dev
, true);
498 vlist_update(&bst
->members
);
500 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
501 bridge_add_member(bst
, blobmsg_data(cur
));
504 vlist_flush(&bst
->members
);
505 bridge_check_retry(bst
);
509 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
511 struct bridge_config
*cfg
= &bst
->config
;
512 struct blob_attr
*cur
;
516 cfg
->forward_delay
= 2;
517 cfg
->igmp_snoop
= true;
518 cfg
->bridge_empty
= false;
519 cfg
->priority
= 0x7FFF;
521 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
522 cfg
->stp
= blobmsg_get_bool(cur
);
524 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
525 cfg
->forward_delay
= blobmsg_get_u32(cur
);
527 if ((cur
= tb
[BRIDGE_ATTR_PRIORITY
]))
528 cfg
->priority
= blobmsg_get_u32(cur
);
530 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
531 cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
533 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
534 cfg
->ageing_time
= blobmsg_get_u32(cur
);
535 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
538 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
539 cfg
->hello_time
= blobmsg_get_u32(cur
);
540 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
543 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
544 cfg
->max_age
= blobmsg_get_u32(cur
);
545 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
548 if ((cur
= tb
[BRIDGE_ATTR_BRIDGE_EMPTY
]))
549 cfg
->bridge_empty
= blobmsg_get_bool(cur
);
553 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
555 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
556 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
557 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
559 struct bridge_state
*bst
;
561 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
562 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
564 bst
= container_of(dev
, struct bridge_state
, dev
);
566 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
567 blob_data(attr
), blob_len(attr
));
568 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
569 blob_data(attr
), blob_len(attr
));
571 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
572 device_init_settings(dev
, tb_dev
);
573 bridge_apply_settings(bst
, tb_br
);
575 if (bst
->config_data
) {
576 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
577 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
579 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
580 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
583 uci_blob_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
584 if (diff
& ~(1 << DEV_ATTR_IFNAME
))
585 ret
= DEV_CONFIG_RESTART
;
587 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
588 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
591 uci_blob_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
592 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
593 ret
= DEV_CONFIG_RESTART
;
595 bridge_config_init(dev
);
598 bst
->config_data
= attr
;
603 bridge_retry_members(struct uloop_timeout
*timeout
)
605 struct bridge_state
*bst
= container_of(timeout
, struct bridge_state
, retry
);
606 struct bridge_member
*bm
;
609 vlist_for_each_element(&bst
->members
, bm
, node
) {
613 if (!bm
->dev
.dev
->present
)
617 bridge_enable_member(bm
);
621 static struct device
*
622 bridge_create(const char *name
, struct blob_attr
*attr
)
624 struct bridge_state
*bst
;
625 struct device
*dev
= NULL
;
627 bst
= calloc(1, sizeof(*bst
));
632 device_init(dev
, &bridge_device_type
, name
);
633 dev
->config_pending
= true;
634 bst
->retry
.cb
= bridge_retry_members
;
636 bst
->set_state
= dev
->set_state
;
637 dev
->set_state
= bridge_set_state
;
639 dev
->hotplug_ops
= &bridge_ops
;
641 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
642 bst
->members
.keep_old
= true;
643 bridge_reload(dev
, attr
);