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_interface(struct bridge_state
*bst
)
158 ret
= system_bridge_addbr(&bst
->dev
, &bst
->config
);
167 bridge_disable_interface(struct bridge_state
*bst
)
172 system_bridge_delbr(&bst
->dev
);
177 bridge_enable_member(struct bridge_member
*bm
)
179 struct bridge_state
*bst
= bm
->bst
;
185 ret
= bridge_enable_interface(bst
);
189 /* Disable IPv6 for bridge members */
190 if (!(bm
->dev
.dev
->settings
.flags
& DEV_OPT_IPV6
)) {
191 bm
->dev
.dev
->settings
.ipv6
= 0;
192 bm
->dev
.dev
->settings
.flags
|= DEV_OPT_IPV6
;
195 ret
= device_claim(&bm
->dev
);
199 ret
= system_bridge_addif(&bst
->dev
, bm
->dev
.dev
);
201 D(DEVICE
, "Bridge device %s could not be added\n", bm
->dev
.dev
->ifname
);
205 device_set_present(&bst
->dev
, true);
206 device_broadcast_event(&bst
->dev
, DEV_EVENT_TOPO_CHANGE
);
214 device_release(&bm
->dev
);
220 bridge_remove_member(struct bridge_member
*bm
)
222 struct bridge_state
*bst
= bm
->bst
;
227 if (bm
== bst
->primary_port
)
228 bridge_reset_primary(bst
);
231 bridge_disable_member(bm
);
234 bm
->bst
->n_present
--;
236 if (bst
->config
.bridge_empty
)
239 bst
->force_active
= false;
240 if (bst
->n_present
== 0)
241 device_set_present(&bst
->dev
, false);
245 bridge_free_member(struct bridge_member
*bm
)
247 struct device
*dev
= bm
->dev
.dev
;
249 bridge_remove_member(bm
);
250 device_remove_user(&bm
->dev
);
253 * When reloading the config and moving a device from one bridge to
254 * another, the other bridge may have tried to claim this device
255 * before it was removed here.
256 * Ensure that claiming the device is retried by toggling its present
260 device_set_present(dev
, false);
261 device_set_present(dev
, true);
268 bridge_check_retry(struct bridge_state
*bst
)
273 uloop_timeout_set(&bst
->retry
, 100);
277 bridge_member_cb(struct device_user
*dev
, enum device_event ev
)
279 struct bridge_member
*bm
= container_of(dev
, struct bridge_member
, dev
);
280 struct bridge_state
*bst
= bm
->bst
;
284 assert(!bm
->present
);
289 if (bst
->n_present
== 1)
290 device_set_present(&bst
->dev
, true);
291 if (bst
->dev
.active
&& !bridge_enable_member(bm
)) {
293 * Adding a bridge member can overwrite the bridge mtu
294 * in the kernel, apply the bridge settings in case the
297 system_if_apply_settings(&bst
->dev
, &bst
->dev
.settings
,
302 case DEV_EVENT_REMOVE
:
304 vlist_delete(&bst
->members
, &bm
->node
);
309 bridge_remove_member(bm
);
318 bridge_set_down(struct bridge_state
*bst
)
320 struct bridge_member
*bm
;
322 bst
->set_state(&bst
->dev
, false);
324 vlist_for_each_element(&bst
->members
, bm
, node
)
325 bridge_disable_member(bm
);
327 bridge_disable_interface(bst
);
333 bridge_set_up(struct bridge_state
*bst
)
335 struct bridge_member
*bm
;
338 if (!bst
->n_present
) {
339 if (!bst
->force_active
)
342 ret
= bridge_enable_interface(bst
);
348 vlist_for_each_element(&bst
->members
, bm
, node
)
349 bridge_enable_member(bm
);
350 bridge_check_retry(bst
);
352 if (!bst
->force_active
&& !bst
->n_present
) {
353 /* initialization of all member interfaces failed */
354 bridge_disable_interface(bst
);
355 device_set_present(&bst
->dev
, false);
359 bridge_reset_primary(bst
);
360 ret
= bst
->set_state(&bst
->dev
, true);
362 bridge_set_down(bst
);
368 bridge_set_state(struct device
*dev
, bool up
)
370 struct bridge_state
*bst
;
372 bst
= container_of(dev
, struct bridge_state
, dev
);
375 return bridge_set_up(bst
);
377 return bridge_set_down(bst
);
380 static struct bridge_member
*
381 bridge_create_member(struct bridge_state
*bst
, struct device
*dev
, bool hotplug
)
383 struct bridge_member
*bm
;
385 bm
= calloc(1, sizeof(*bm
) + strlen(dev
->ifname
) + 1);
390 bm
->dev
.cb
= bridge_member_cb
;
391 bm
->dev
.hotplug
= hotplug
;
392 strcpy(bm
->name
, dev
->ifname
);
394 vlist_add(&bst
->members
, &bm
->node
, bm
->name
);
395 // Need to look up the bridge member again as the above
396 // created pointer will be freed in case the bridge member
398 bm
= vlist_find(&bst
->members
, dev
->ifname
, bm
, node
);
400 bm
->node
.version
= -1;
406 bridge_member_update(struct vlist_tree
*tree
, struct vlist_node
*node_new
,
407 struct vlist_node
*node_old
)
409 struct bridge_member
*bm
;
413 bm
= container_of(node_new
, struct bridge_member
, node
);
422 device_add_user(&bm
->dev
, dev
);
427 bm
= container_of(node_old
, struct bridge_member
, node
);
428 bridge_free_member(bm
);
434 bridge_add_member(struct bridge_state
*bst
, const char *name
)
438 dev
= device_get(name
, true);
442 bridge_create_member(bst
, dev
, false);
446 bridge_hotplug_add(struct device
*dev
, struct device
*member
)
448 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
450 bridge_create_member(bst
, member
, true);
456 bridge_hotplug_del(struct device
*dev
, struct device
*member
)
458 struct bridge_state
*bst
= container_of(dev
, struct bridge_state
, dev
);
459 struct bridge_member
*bm
;
461 bm
= vlist_find(&bst
->members
, member
->ifname
, bm
, node
);
463 return UBUS_STATUS_NOT_FOUND
;
465 vlist_delete(&bst
->members
, &bm
->node
);
470 bridge_hotplug_prepare(struct device
*dev
)
472 struct bridge_state
*bst
;
474 bst
= container_of(dev
, struct bridge_state
, dev
);
475 bst
->force_active
= true;
476 device_set_present(&bst
->dev
, true);
481 static const struct device_hotplug_ops bridge_ops
= {
482 .prepare
= bridge_hotplug_prepare
,
483 .add
= bridge_hotplug_add
,
484 .del
= bridge_hotplug_del
488 bridge_free(struct device
*dev
)
490 struct bridge_state
*bst
;
492 bst
= container_of(dev
, struct bridge_state
, dev
);
493 vlist_flush_all(&bst
->members
);
494 free(bst
->config_data
);
499 bridge_dump_info(struct device
*dev
, struct blob_buf
*b
)
501 struct bridge_state
*bst
;
502 struct bridge_member
*bm
;
505 bst
= container_of(dev
, struct bridge_state
, dev
);
507 system_if_dump_info(dev
, b
);
508 list
= blobmsg_open_array(b
, "bridge-members");
510 vlist_for_each_element(&bst
->members
, bm
, node
)
511 blobmsg_add_string(b
, NULL
, bm
->dev
.dev
->ifname
);
513 blobmsg_close_array(b
, list
);
517 bridge_config_init(struct device
*dev
)
519 struct bridge_state
*bst
;
520 struct blob_attr
*cur
;
523 bst
= container_of(dev
, struct bridge_state
, dev
);
525 if (bst
->config
.bridge_empty
) {
526 bst
->force_active
= true;
527 device_set_present(&bst
->dev
, true);
531 vlist_update(&bst
->members
);
533 blobmsg_for_each_attr(cur
, bst
->ifnames
, rem
) {
534 bridge_add_member(bst
, blobmsg_data(cur
));
537 vlist_flush(&bst
->members
);
538 bridge_check_retry(bst
);
542 bridge_apply_settings(struct bridge_state
*bst
, struct blob_attr
**tb
)
544 struct bridge_config
*cfg
= &bst
->config
;
545 struct blob_attr
*cur
;
549 cfg
->forward_delay
= 2;
550 cfg
->igmp_snoop
= true;
551 cfg
->bridge_empty
= false;
552 cfg
->priority
= 0x7FFF;
554 if ((cur
= tb
[BRIDGE_ATTR_STP
]))
555 cfg
->stp
= blobmsg_get_bool(cur
);
557 if ((cur
= tb
[BRIDGE_ATTR_FORWARD_DELAY
]))
558 cfg
->forward_delay
= blobmsg_get_u32(cur
);
560 if ((cur
= tb
[BRIDGE_ATTR_PRIORITY
]))
561 cfg
->priority
= blobmsg_get_u32(cur
);
563 if ((cur
= tb
[BRIDGE_ATTR_IGMP_SNOOP
]))
564 cfg
->igmp_snoop
= blobmsg_get_bool(cur
);
566 if ((cur
= tb
[BRIDGE_ATTR_AGEING_TIME
])) {
567 cfg
->ageing_time
= blobmsg_get_u32(cur
);
568 cfg
->flags
|= BRIDGE_OPT_AGEING_TIME
;
571 if ((cur
= tb
[BRIDGE_ATTR_HELLO_TIME
])) {
572 cfg
->hello_time
= blobmsg_get_u32(cur
);
573 cfg
->flags
|= BRIDGE_OPT_HELLO_TIME
;
576 if ((cur
= tb
[BRIDGE_ATTR_MAX_AGE
])) {
577 cfg
->max_age
= blobmsg_get_u32(cur
);
578 cfg
->flags
|= BRIDGE_OPT_MAX_AGE
;
581 if ((cur
= tb
[BRIDGE_ATTR_BRIDGE_EMPTY
]))
582 cfg
->bridge_empty
= blobmsg_get_bool(cur
);
586 bridge_reload(struct device
*dev
, struct blob_attr
*attr
)
588 struct blob_attr
*tb_dev
[__DEV_ATTR_MAX
];
589 struct blob_attr
*tb_br
[__BRIDGE_ATTR_MAX
];
590 enum dev_change_type ret
= DEV_CONFIG_APPLIED
;
592 struct bridge_state
*bst
;
594 BUILD_BUG_ON(sizeof(diff
) < __BRIDGE_ATTR_MAX
/ 8);
595 BUILD_BUG_ON(sizeof(diff
) < __DEV_ATTR_MAX
/ 8);
597 bst
= container_of(dev
, struct bridge_state
, dev
);
598 attr
= blob_memdup(attr
);
600 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, tb_dev
,
601 blob_data(attr
), blob_len(attr
));
602 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, tb_br
,
603 blob_data(attr
), blob_len(attr
));
605 bst
->ifnames
= tb_br
[BRIDGE_ATTR_IFNAME
];
606 device_init_settings(dev
, tb_dev
);
607 bridge_apply_settings(bst
, tb_br
);
609 if (bst
->config_data
) {
610 struct blob_attr
*otb_dev
[__DEV_ATTR_MAX
];
611 struct blob_attr
*otb_br
[__BRIDGE_ATTR_MAX
];
613 blobmsg_parse(device_attr_list
.params
, __DEV_ATTR_MAX
, otb_dev
,
614 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
617 uci_blob_diff(tb_dev
, otb_dev
, &device_attr_list
, &diff
);
618 if (diff
& ~(1 << DEV_ATTR_IFNAME
))
619 ret
= DEV_CONFIG_RESTART
;
621 blobmsg_parse(bridge_attrs
, __BRIDGE_ATTR_MAX
, otb_br
,
622 blob_data(bst
->config_data
), blob_len(bst
->config_data
));
625 uci_blob_diff(tb_br
, otb_br
, &bridge_attr_list
, &diff
);
626 if (diff
& ~(1 << BRIDGE_ATTR_IFNAME
))
627 ret
= DEV_CONFIG_RESTART
;
629 bridge_config_init(dev
);
632 free(bst
->config_data
);
633 bst
->config_data
= attr
;
638 bridge_retry_members(struct uloop_timeout
*timeout
)
640 struct bridge_state
*bst
= container_of(timeout
, struct bridge_state
, retry
);
641 struct bridge_member
*bm
;
644 vlist_for_each_element(&bst
->members
, bm
, node
) {
648 if (!bm
->dev
.dev
->present
)
653 bridge_enable_member(bm
);
657 static struct device
*
658 bridge_create(const char *name
, struct blob_attr
*attr
)
660 struct bridge_state
*bst
;
661 struct device
*dev
= NULL
;
663 bst
= calloc(1, sizeof(*bst
));
668 device_init(dev
, &bridge_device_type
, name
);
669 dev
->config_pending
= true;
670 bst
->retry
.cb
= bridge_retry_members
;
672 bst
->set_state
= dev
->set_state
;
673 dev
->set_state
= bridge_set_state
;
675 dev
->hotplug_ops
= &bridge_ops
;
677 vlist_init(&bst
->members
, avl_strcmp
, bridge_member_update
);
678 bst
->members
.keep_old
= true;
679 bridge_reload(dev
, attr
);