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,
37 BRIDGE_ATTR_ROBUSTNESS,
38 BRIDGE_ATTR_QUERY_INTERVAL,
39 BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL,
40 BRIDGE_ATTR_LAST_MEMBER_INTERVAL,
44 static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = {
45 [BRIDGE_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
46 [BRIDGE_ATTR_STP] = { "stp", BLOBMSG_TYPE_BOOL },
47 [BRIDGE_ATTR_FORWARD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 },
48 [BRIDGE_ATTR_PRIORITY] = { "priority", BLOBMSG_TYPE_INT32 },
49 [BRIDGE_ATTR_AGEING_TIME] = { "ageing_time", BLOBMSG_TYPE_INT32 },
50 [BRIDGE_ATTR_HELLO_TIME] = { "hello_time", BLOBMSG_TYPE_INT32 },
51 [BRIDGE_ATTR_MAX_AGE] = { "max_age", BLOBMSG_TYPE_INT32 },
52 [BRIDGE_ATTR_IGMP_SNOOP] = { "igmp_snooping", BLOBMSG_TYPE_BOOL },
53 [BRIDGE_ATTR_BRIDGE_EMPTY] = { "bridge_empty", BLOBMSG_TYPE_BOOL },
54 [BRIDGE_ATTR_MULTICAST_QUERIER] = { "multicast_querier", BLOBMSG_TYPE_BOOL },
55 [BRIDGE_ATTR_HASH_MAX] = { "hash_max", BLOBMSG_TYPE_INT32 },
56 [BRIDGE_ATTR_ROBUSTNESS] = { "robustness", BLOBMSG_TYPE_INT32 },
57 [BRIDGE_ATTR_QUERY_INTERVAL] = { "query_interval", BLOBMSG_TYPE_INT32 },
58 [BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL] = { "query_response_interval", BLOBMSG_TYPE_INT32 },
59 [BRIDGE_ATTR_LAST_MEMBER_INTERVAL] = { "last_member_interval", BLOBMSG_TYPE_INT32 },
62 static const struct uci_blob_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = {
63 [BRIDGE_ATTR_IFNAME] = { .type = BLOBMSG_TYPE_STRING },
66 static const struct uci_blob_param_list bridge_attr_list = {
67 .n_params = __BRIDGE_ATTR_MAX,
68 .params = bridge_attrs,
69 .info = bridge_attr_info,
72 .next = { &device_attr_list },
75 static struct device *bridge_create(const char *name, struct device_type *devtype,
76 struct blob_attr *attr);
77 static void bridge_config_init(struct device *dev);
78 static void bridge_free(struct device *dev);
79 static void bridge_dump_info(struct device *dev, struct blob_buf *b);
81 bridge_reload(struct device *dev, struct blob_attr *attr);
83 static struct device_type bridge_device_type = {
85 .config_params = &bridge_attr_list,
87 .bridge_capability = true,
90 .create = bridge_create,
91 .config_init = bridge_config_init,
92 .reload = bridge_reload,
94 .dump_info = bridge_dump_info,
99 device_state_cb set_state;
101 struct blob_attr *config_data;
102 struct bridge_config config;
103 struct blob_attr *ifnames;
107 struct uloop_timeout retry;
108 struct bridge_member *primary_port;
109 struct vlist_tree members;
114 struct bridge_member {
115 struct vlist_node node;
116 struct bridge_state *bst;
117 struct device_user dev;
123 bridge_reset_primary(struct bridge_state *bst)
125 struct bridge_member *bm;
127 if (!bst->primary_port &&
128 (bst->dev.settings.flags & DEV_OPT_MACADDR))
131 bst->primary_port = NULL;
132 bst->dev.settings.flags &= ~DEV_OPT_MACADDR;
133 vlist_for_each_element(&bst->members, bm, node) {
139 bst->primary_port = bm;
140 if (bm->dev.dev->settings.flags & DEV_OPT_MACADDR)
141 macaddr = bm->dev.dev->settings.macaddr;
143 macaddr = bm->dev.dev->orig_settings.macaddr;
144 memcpy(bst->dev.settings.macaddr, macaddr, 6);
145 bst->dev.settings.flags |= DEV_OPT_MACADDR;
151 bridge_disable_member(struct bridge_member *bm)
153 struct bridge_state *bst = bm->bst;
158 system_bridge_delif(&bst->dev, bm->dev.dev);
159 device_release(&bm->dev);
161 device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
167 bridge_enable_interface(struct bridge_state *bst)
174 ret = system_bridge_addbr(&bst->dev, &bst->config);
183 bridge_disable_interface(struct bridge_state *bst)
188 system_bridge_delbr(&bst->dev);
193 bridge_enable_member(struct bridge_member *bm)
195 struct bridge_state *bst = bm->bst;
201 ret = bridge_enable_interface(bst);
205 /* Disable IPv6 for bridge members */
206 if (!(bm->dev.dev->settings.flags & DEV_OPT_IPV6)) {
207 bm->dev.dev->settings.ipv6 = 0;
208 bm->dev.dev->settings.flags |= DEV_OPT_IPV6;
211 ret = device_claim(&bm->dev);
215 ret = system_bridge_addif(&bst->dev, bm->dev.dev);
217 D(DEVICE, "Bridge device %s could not be added\n", bm->dev.dev->ifname);
221 device_set_present(&bst->dev, true);
222 device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
230 device_release(&bm->dev);
236 bridge_remove_member(struct bridge_member *bm)
238 struct bridge_state *bst = bm->bst;
243 if (bm == bst->primary_port)
244 bridge_reset_primary(bst);
247 bridge_disable_member(bm);
250 bm->bst->n_present--;
252 if (bst->config.bridge_empty)
255 bst->force_active = false;
256 if (bst->n_present == 0)
257 device_set_present(&bst->dev, false);
261 bridge_free_member(struct bridge_member *bm)
263 struct device *dev = bm->dev.dev;
265 bridge_remove_member(bm);
266 device_remove_user(&bm->dev);
269 * When reloading the config and moving a device from one bridge to
270 * another, the other bridge may have tried to claim this device
271 * before it was removed here.
272 * Ensure that claiming the device is retried by toggling its present
276 device_set_present(dev, false);
277 device_set_present(dev, true);
284 bridge_check_retry(struct bridge_state *bst)
289 uloop_timeout_set(&bst->retry, 100);
293 bridge_member_cb(struct device_user *dev, enum device_event ev)
295 struct bridge_member *bm = container_of(dev, struct bridge_member, dev);
296 struct bridge_state *bst = bm->bst;
300 assert(!bm->present);
305 if (bst->n_present == 1)
306 device_set_present(&bst->dev, true);
307 if (bst->dev.active && !bridge_enable_member(bm)) {
309 * Adding a bridge member can overwrite the bridge mtu
310 * in the kernel, apply the bridge settings in case the
313 system_if_apply_settings(&bst->dev, &bst->dev.settings,
314 DEV_OPT_MTU | DEV_OPT_MTU6);
318 case DEV_EVENT_REMOVE:
320 vlist_delete(&bst->members, &bm->node);
325 bridge_remove_member(bm);
334 bridge_set_down(struct bridge_state *bst)
336 struct bridge_member *bm;
338 bst->set_state(&bst->dev, false);
340 vlist_for_each_element(&bst->members, bm, node)
341 bridge_disable_member(bm);
343 bridge_disable_interface(bst);
349 bridge_set_up(struct bridge_state *bst)
351 struct bridge_member *bm;
354 if (!bst->n_present) {
355 if (!bst->force_active)
358 ret = bridge_enable_interface(bst);
364 vlist_for_each_element(&bst->members, bm, node)
365 bridge_enable_member(bm);
366 bridge_check_retry(bst);
368 if (!bst->force_active && !bst->n_present) {
369 /* initialization of all member interfaces failed */
370 bridge_disable_interface(bst);
371 device_set_present(&bst->dev, false);
375 bridge_reset_primary(bst);
376 ret = bst->set_state(&bst->dev, true);
378 bridge_set_down(bst);
384 bridge_set_state(struct device *dev, bool up)
386 struct bridge_state *bst;
388 bst = container_of(dev, struct bridge_state, dev);
391 return bridge_set_up(bst);
393 return bridge_set_down(bst);
396 static struct bridge_member *
397 bridge_create_member(struct bridge_state *bst, const char *name,
398 struct device *dev, bool hotplug)
400 struct bridge_member *bm;
402 bm = calloc(1, sizeof(*bm) + strlen(name) + 1);
407 bm->dev.cb = bridge_member_cb;
408 bm->dev.hotplug = hotplug;
409 strcpy(bm->name, name);
411 vlist_add(&bst->members, &bm->node, bm->name);
412 // Need to look up the bridge member again as the above
413 // created pointer will be freed in case the bridge member
415 bm = vlist_find(&bst->members, name, bm, node);
417 bm->node.version = -1;
423 bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
424 struct vlist_node *node_old)
426 struct bridge_member *bm;
430 bm = container_of(node_new, struct bridge_member, node);
439 device_add_user(&bm->dev, dev);
444 bm = container_of(node_old, struct bridge_member, node);
445 bridge_free_member(bm);
451 bridge_add_member(struct bridge_state *bst, const char *name)
455 dev = device_get(name, true);
459 bridge_create_member(bst, name, dev, false);
463 bridge_hotplug_add(struct device *dev, struct device *member)
465 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
467 bridge_create_member(bst, member->ifname, member, true);
473 bridge_hotplug_del(struct device *dev, struct device *member)
475 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
476 struct bridge_member *bm;
478 bm = vlist_find(&bst->members, member->ifname, bm, node);
480 return UBUS_STATUS_NOT_FOUND;
482 vlist_delete(&bst->members, &bm->node);
487 bridge_hotplug_prepare(struct device *dev)
489 struct bridge_state *bst;
491 bst = container_of(dev, struct bridge_state, dev);
492 bst->force_active = true;
493 device_set_present(&bst->dev, true);
498 static const struct device_hotplug_ops bridge_ops = {
499 .prepare = bridge_hotplug_prepare,
500 .add = bridge_hotplug_add,
501 .del = bridge_hotplug_del
505 bridge_free(struct device *dev)
507 struct bridge_state *bst;
509 bst = container_of(dev, struct bridge_state, dev);
510 vlist_flush_all(&bst->members);
511 free(bst->config_data);
516 bridge_dump_info(struct device *dev, struct blob_buf *b)
518 struct bridge_state *bst;
519 struct bridge_member *bm;
522 bst = container_of(dev, struct bridge_state, dev);
524 system_if_dump_info(dev, b);
525 list = blobmsg_open_array(b, "bridge-members");
527 vlist_for_each_element(&bst->members, bm, node) {
528 if (bm->dev.dev->hidden)
531 blobmsg_add_string(b, NULL, bm->dev.dev->ifname);
534 blobmsg_close_array(b, list);
538 bridge_config_init(struct device *dev)
540 struct bridge_state *bst;
541 struct blob_attr *cur;
544 bst = container_of(dev, struct bridge_state, dev);
546 if (bst->config.bridge_empty) {
547 bst->force_active = true;
548 device_set_present(&bst->dev, true);
552 vlist_update(&bst->members);
554 blobmsg_for_each_attr(cur, bst->ifnames, rem) {
555 bridge_add_member(bst, blobmsg_data(cur));
558 vlist_flush(&bst->members);
559 bridge_check_retry(bst);
563 bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb)
565 struct bridge_config *cfg = &bst->config;
566 struct blob_attr *cur;
570 cfg->forward_delay = 2;
572 cfg->query_interval = 12500;
573 cfg->query_response_interval = 1000;
574 cfg->last_member_interval = 100;
576 cfg->bridge_empty = false;
577 cfg->priority = 0x7FFF;
579 if ((cur = tb[BRIDGE_ATTR_STP]))
580 cfg->stp = blobmsg_get_bool(cur);
582 if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY]))
583 cfg->forward_delay = blobmsg_get_u32(cur);
585 if ((cur = tb[BRIDGE_ATTR_PRIORITY]))
586 cfg->priority = blobmsg_get_u32(cur);
588 if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP]))
589 cfg->multicast_querier = cfg->igmp_snoop = blobmsg_get_bool(cur);
591 if ((cur = tb[BRIDGE_ATTR_MULTICAST_QUERIER]))
592 cfg->multicast_querier = blobmsg_get_bool(cur);
594 if ((cur = tb[BRIDGE_ATTR_HASH_MAX]))
595 cfg->hash_max = blobmsg_get_u32(cur);
597 if ((cur = tb[BRIDGE_ATTR_ROBUSTNESS])) {
598 cfg->robustness = blobmsg_get_u32(cur);
599 cfg->flags |= BRIDGE_OPT_ROBUSTNESS;
602 if ((cur = tb[BRIDGE_ATTR_QUERY_INTERVAL])) {
603 cfg->query_interval = blobmsg_get_u32(cur);
604 cfg->flags |= BRIDGE_OPT_QUERY_INTERVAL;
607 if ((cur = tb[BRIDGE_ATTR_QUERY_RESPONSE_INTERVAL])) {
608 cfg->query_response_interval = blobmsg_get_u32(cur);
609 cfg->flags |= BRIDGE_OPT_QUERY_RESPONSE_INTERVAL;
612 if ((cur = tb[BRIDGE_ATTR_LAST_MEMBER_INTERVAL])) {
613 cfg->last_member_interval = blobmsg_get_u32(cur);
614 cfg->flags |= BRIDGE_OPT_LAST_MEMBER_INTERVAL;
617 if ((cur = tb[BRIDGE_ATTR_AGEING_TIME])) {
618 cfg->ageing_time = blobmsg_get_u32(cur);
619 cfg->flags |= BRIDGE_OPT_AGEING_TIME;
622 if ((cur = tb[BRIDGE_ATTR_HELLO_TIME])) {
623 cfg->hello_time = blobmsg_get_u32(cur);
624 cfg->flags |= BRIDGE_OPT_HELLO_TIME;
627 if ((cur = tb[BRIDGE_ATTR_MAX_AGE])) {
628 cfg->max_age = blobmsg_get_u32(cur);
629 cfg->flags |= BRIDGE_OPT_MAX_AGE;
632 if ((cur = tb[BRIDGE_ATTR_BRIDGE_EMPTY]))
633 cfg->bridge_empty = blobmsg_get_bool(cur);
637 bridge_reload(struct device *dev, struct blob_attr *attr)
639 struct blob_attr *tb_dev[__DEV_ATTR_MAX];
640 struct blob_attr *tb_br[__BRIDGE_ATTR_MAX];
641 enum dev_change_type ret = DEV_CONFIG_APPLIED;
643 struct bridge_state *bst;
645 BUILD_BUG_ON(sizeof(diff) < __BRIDGE_ATTR_MAX / 8);
646 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
648 bst = container_of(dev, struct bridge_state, dev);
649 attr = blob_memdup(attr);
651 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
652 blob_data(attr), blob_len(attr));
653 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, tb_br,
654 blob_data(attr), blob_len(attr));
656 if (tb_dev[DEV_ATTR_MACADDR])
657 bst->primary_port = NULL;
659 bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
660 device_init_settings(dev, tb_dev);
661 bridge_apply_settings(bst, tb_br);
663 if (bst->config_data) {
664 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
665 struct blob_attr *otb_br[__BRIDGE_ATTR_MAX];
667 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
668 blob_data(bst->config_data), blob_len(bst->config_data));
671 uci_blob_diff(tb_dev, otb_dev, &device_attr_list, &diff);
673 ret = DEV_CONFIG_RESTART;
675 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, otb_br,
676 blob_data(bst->config_data), blob_len(bst->config_data));
679 uci_blob_diff(tb_br, otb_br, &bridge_attr_list, &diff);
680 if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
681 ret = DEV_CONFIG_RESTART;
683 bridge_config_init(dev);
686 free(bst->config_data);
687 bst->config_data = attr;
692 bridge_retry_members(struct uloop_timeout *timeout)
694 struct bridge_state *bst = container_of(timeout, struct bridge_state, retry);
695 struct bridge_member *bm;
698 vlist_for_each_element(&bst->members, bm, node) {
702 if (!bm->dev.dev->present)
707 bridge_enable_member(bm);
711 static struct device *
712 bridge_create(const char *name, struct device_type *devtype,
713 struct blob_attr *attr)
715 struct bridge_state *bst;
716 struct device *dev = NULL;
718 bst = calloc(1, sizeof(*bst));
723 device_init(dev, devtype, name);
724 dev->config_pending = true;
725 bst->retry.cb = bridge_retry_members;
727 bst->set_state = dev->set_state;
728 dev->set_state = bridge_set_state;
730 dev->hotplug_ops = &bridge_ops;
732 vlist_init(&bst->members, avl_strcmp, bridge_member_update);
733 bst->members.keep_old = true;
734 bridge_reload(dev, attr);
739 static void __init bridge_device_type_init(void)
741 device_type_add(&bridge_device_type);