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,
40 static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = {
41 [BRIDGE_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
42 [BRIDGE_ATTR_STP] = { "stp", BLOBMSG_TYPE_BOOL },
43 [BRIDGE_ATTR_FORWARD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 },
44 [BRIDGE_ATTR_PRIORITY] = { "priority", BLOBMSG_TYPE_INT32 },
45 [BRIDGE_ATTR_AGEING_TIME] = { "ageing_time", BLOBMSG_TYPE_INT32 },
46 [BRIDGE_ATTR_HELLO_TIME] = { "hello_time", BLOBMSG_TYPE_INT32 },
47 [BRIDGE_ATTR_MAX_AGE] = { "max_age", BLOBMSG_TYPE_INT32 },
48 [BRIDGE_ATTR_IGMP_SNOOP] = { "igmp_snooping", BLOBMSG_TYPE_BOOL },
49 [BRIDGE_ATTR_BRIDGE_EMPTY] = { "bridge_empty", BLOBMSG_TYPE_BOOL },
50 [BRIDGE_ATTR_MULTICAST_QUERIER] = { "multicast_querier", BLOBMSG_TYPE_BOOL },
51 [BRIDGE_ATTR_HASH_MAX] = { "hash_max", BLOBMSG_TYPE_INT32 },
54 static const struct uci_blob_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = {
55 [BRIDGE_ATTR_IFNAME] = { .type = BLOBMSG_TYPE_STRING },
58 static const struct uci_blob_param_list bridge_attr_list = {
59 .n_params = __BRIDGE_ATTR_MAX,
60 .params = bridge_attrs,
61 .info = bridge_attr_info,
64 .next = { &device_attr_list },
67 static struct device *bridge_create(const char *name, struct blob_attr *attr);
68 static void bridge_config_init(struct device *dev);
69 static void bridge_free(struct device *dev);
70 static void bridge_dump_info(struct device *dev, struct blob_buf *b);
72 bridge_reload(struct device *dev, struct blob_attr *attr);
74 const struct device_type bridge_device_type = {
76 .config_params = &bridge_attr_list,
78 .create = bridge_create,
79 .config_init = bridge_config_init,
80 .reload = bridge_reload,
82 .dump_info = bridge_dump_info,
87 device_state_cb set_state;
89 struct blob_attr *config_data;
90 struct bridge_config config;
91 struct blob_attr *ifnames;
95 struct uloop_timeout retry;
96 struct bridge_member *primary_port;
97 struct vlist_tree members;
102 struct bridge_member {
103 struct vlist_node node;
104 struct bridge_state *bst;
105 struct device_user dev;
111 bridge_reset_primary(struct bridge_state *bst)
113 struct bridge_member *bm;
115 if (!bst->primary_port &&
116 (bst->dev.settings.flags & DEV_OPT_MACADDR))
119 bst->primary_port = NULL;
120 bst->dev.settings.flags &= ~DEV_OPT_MACADDR;
121 vlist_for_each_element(&bst->members, bm, node) {
127 bst->primary_port = bm;
128 if (bm->dev.dev->settings.flags & DEV_OPT_MACADDR)
129 macaddr = bm->dev.dev->settings.macaddr;
131 macaddr = bm->dev.dev->orig_settings.macaddr;
132 memcpy(bst->dev.settings.macaddr, macaddr, 6);
133 bst->dev.settings.flags |= DEV_OPT_MACADDR;
139 bridge_disable_member(struct bridge_member *bm)
141 struct bridge_state *bst = bm->bst;
146 system_bridge_delif(&bst->dev, bm->dev.dev);
147 device_release(&bm->dev);
149 device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
155 bridge_enable_interface(struct bridge_state *bst)
162 ret = system_bridge_addbr(&bst->dev, &bst->config);
171 bridge_disable_interface(struct bridge_state *bst)
176 system_bridge_delbr(&bst->dev);
181 bridge_enable_member(struct bridge_member *bm)
183 struct bridge_state *bst = bm->bst;
189 ret = bridge_enable_interface(bst);
193 /* Disable IPv6 for bridge members */
194 if (!(bm->dev.dev->settings.flags & DEV_OPT_IPV6)) {
195 bm->dev.dev->settings.ipv6 = 0;
196 bm->dev.dev->settings.flags |= DEV_OPT_IPV6;
199 ret = device_claim(&bm->dev);
203 ret = system_bridge_addif(&bst->dev, bm->dev.dev);
205 D(DEVICE, "Bridge device %s could not be added\n", bm->dev.dev->ifname);
209 device_set_present(&bst->dev, true);
210 device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
218 device_release(&bm->dev);
224 bridge_remove_member(struct bridge_member *bm)
226 struct bridge_state *bst = bm->bst;
231 if (bm == bst->primary_port)
232 bridge_reset_primary(bst);
235 bridge_disable_member(bm);
238 bm->bst->n_present--;
240 if (bst->config.bridge_empty)
243 bst->force_active = false;
244 if (bst->n_present == 0)
245 device_set_present(&bst->dev, false);
249 bridge_free_member(struct bridge_member *bm)
251 struct device *dev = bm->dev.dev;
253 bridge_remove_member(bm);
254 device_remove_user(&bm->dev);
257 * When reloading the config and moving a device from one bridge to
258 * another, the other bridge may have tried to claim this device
259 * before it was removed here.
260 * Ensure that claiming the device is retried by toggling its present
264 device_set_present(dev, false);
265 device_set_present(dev, true);
272 bridge_check_retry(struct bridge_state *bst)
277 uloop_timeout_set(&bst->retry, 100);
281 bridge_member_cb(struct device_user *dev, enum device_event ev)
283 struct bridge_member *bm = container_of(dev, struct bridge_member, dev);
284 struct bridge_state *bst = bm->bst;
288 assert(!bm->present);
293 if (bst->n_present == 1)
294 device_set_present(&bst->dev, true);
295 if (bst->dev.active && !bridge_enable_member(bm)) {
297 * Adding a bridge member can overwrite the bridge mtu
298 * in the kernel, apply the bridge settings in case the
301 system_if_apply_settings(&bst->dev, &bst->dev.settings,
306 case DEV_EVENT_REMOVE:
308 vlist_delete(&bst->members, &bm->node);
313 bridge_remove_member(bm);
322 bridge_set_down(struct bridge_state *bst)
324 struct bridge_member *bm;
326 bst->set_state(&bst->dev, false);
328 vlist_for_each_element(&bst->members, bm, node)
329 bridge_disable_member(bm);
331 bridge_disable_interface(bst);
337 bridge_set_up(struct bridge_state *bst)
339 struct bridge_member *bm;
342 if (!bst->n_present) {
343 if (!bst->force_active)
346 ret = bridge_enable_interface(bst);
352 vlist_for_each_element(&bst->members, bm, node)
353 bridge_enable_member(bm);
354 bridge_check_retry(bst);
356 if (!bst->force_active && !bst->n_present) {
357 /* initialization of all member interfaces failed */
358 bridge_disable_interface(bst);
359 device_set_present(&bst->dev, false);
363 bridge_reset_primary(bst);
364 ret = bst->set_state(&bst->dev, true);
366 bridge_set_down(bst);
372 bridge_set_state(struct device *dev, bool up)
374 struct bridge_state *bst;
376 bst = container_of(dev, struct bridge_state, dev);
379 return bridge_set_up(bst);
381 return bridge_set_down(bst);
384 static struct bridge_member *
385 bridge_create_member(struct bridge_state *bst, struct device *dev, bool hotplug)
387 struct bridge_member *bm;
389 bm = calloc(1, sizeof(*bm) + strlen(dev->ifname) + 1);
394 bm->dev.cb = bridge_member_cb;
395 bm->dev.hotplug = hotplug;
396 strcpy(bm->name, dev->ifname);
398 vlist_add(&bst->members, &bm->node, bm->name);
399 // Need to look up the bridge member again as the above
400 // created pointer will be freed in case the bridge member
402 bm = vlist_find(&bst->members, dev->ifname, bm, node);
404 bm->node.version = -1;
410 bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
411 struct vlist_node *node_old)
413 struct bridge_member *bm;
417 bm = container_of(node_new, struct bridge_member, node);
426 device_add_user(&bm->dev, dev);
431 bm = container_of(node_old, struct bridge_member, node);
432 bridge_free_member(bm);
438 bridge_add_member(struct bridge_state *bst, const char *name)
442 dev = device_get(name, true);
446 bridge_create_member(bst, dev, false);
450 bridge_hotplug_add(struct device *dev, struct device *member)
452 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
454 bridge_create_member(bst, member, true);
460 bridge_hotplug_del(struct device *dev, struct device *member)
462 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
463 struct bridge_member *bm;
465 bm = vlist_find(&bst->members, member->ifname, bm, node);
467 return UBUS_STATUS_NOT_FOUND;
469 vlist_delete(&bst->members, &bm->node);
474 bridge_hotplug_prepare(struct device *dev)
476 struct bridge_state *bst;
478 bst = container_of(dev, struct bridge_state, dev);
479 bst->force_active = true;
480 device_set_present(&bst->dev, true);
485 static const struct device_hotplug_ops bridge_ops = {
486 .prepare = bridge_hotplug_prepare,
487 .add = bridge_hotplug_add,
488 .del = bridge_hotplug_del
492 bridge_free(struct device *dev)
494 struct bridge_state *bst;
496 bst = container_of(dev, struct bridge_state, dev);
497 vlist_flush_all(&bst->members);
498 free(bst->config_data);
503 bridge_dump_info(struct device *dev, struct blob_buf *b)
505 struct bridge_state *bst;
506 struct bridge_member *bm;
509 bst = container_of(dev, struct bridge_state, dev);
511 system_if_dump_info(dev, b);
512 list = blobmsg_open_array(b, "bridge-members");
514 vlist_for_each_element(&bst->members, bm, node)
515 blobmsg_add_string(b, NULL, bm->dev.dev->ifname);
517 blobmsg_close_array(b, list);
521 bridge_config_init(struct device *dev)
523 struct bridge_state *bst;
524 struct blob_attr *cur;
527 bst = container_of(dev, struct bridge_state, dev);
529 if (bst->config.bridge_empty) {
530 bst->force_active = true;
531 device_set_present(&bst->dev, true);
535 vlist_update(&bst->members);
537 blobmsg_for_each_attr(cur, bst->ifnames, rem) {
538 bridge_add_member(bst, blobmsg_data(cur));
541 vlist_flush(&bst->members);
542 bridge_check_retry(bst);
546 bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb)
548 struct bridge_config *cfg = &bst->config;
549 struct blob_attr *cur;
553 cfg->forward_delay = 2;
554 cfg->igmp_snoop = true;
555 cfg->multicast_querier = true;
557 cfg->bridge_empty = false;
558 cfg->priority = 0x7FFF;
560 if ((cur = tb[BRIDGE_ATTR_STP]))
561 cfg->stp = blobmsg_get_bool(cur);
563 if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY]))
564 cfg->forward_delay = blobmsg_get_u32(cur);
566 if ((cur = tb[BRIDGE_ATTR_PRIORITY]))
567 cfg->priority = blobmsg_get_u32(cur);
569 if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP]))
570 cfg->multicast_querier = cfg->igmp_snoop = blobmsg_get_bool(cur);
572 if ((cur = tb[BRIDGE_ATTR_MULTICAST_QUERIER]))
573 cfg->multicast_querier = blobmsg_get_bool(cur);
575 if ((cur = tb[BRIDGE_ATTR_HASH_MAX]))
576 cfg->hash_max = blobmsg_get_u32(cur);
578 if ((cur = tb[BRIDGE_ATTR_AGEING_TIME])) {
579 cfg->ageing_time = blobmsg_get_u32(cur);
580 cfg->flags |= BRIDGE_OPT_AGEING_TIME;
583 if ((cur = tb[BRIDGE_ATTR_HELLO_TIME])) {
584 cfg->hello_time = blobmsg_get_u32(cur);
585 cfg->flags |= BRIDGE_OPT_HELLO_TIME;
588 if ((cur = tb[BRIDGE_ATTR_MAX_AGE])) {
589 cfg->max_age = blobmsg_get_u32(cur);
590 cfg->flags |= BRIDGE_OPT_MAX_AGE;
593 if ((cur = tb[BRIDGE_ATTR_BRIDGE_EMPTY]))
594 cfg->bridge_empty = blobmsg_get_bool(cur);
598 bridge_reload(struct device *dev, struct blob_attr *attr)
600 struct blob_attr *tb_dev[__DEV_ATTR_MAX];
601 struct blob_attr *tb_br[__BRIDGE_ATTR_MAX];
602 enum dev_change_type ret = DEV_CONFIG_APPLIED;
604 struct bridge_state *bst;
606 BUILD_BUG_ON(sizeof(diff) < __BRIDGE_ATTR_MAX / 8);
607 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
609 bst = container_of(dev, struct bridge_state, dev);
610 attr = blob_memdup(attr);
612 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
613 blob_data(attr), blob_len(attr));
614 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, tb_br,
615 blob_data(attr), blob_len(attr));
617 bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
618 device_init_settings(dev, tb_dev);
619 bridge_apply_settings(bst, tb_br);
621 if (bst->config_data) {
622 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
623 struct blob_attr *otb_br[__BRIDGE_ATTR_MAX];
625 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
626 blob_data(bst->config_data), blob_len(bst->config_data));
629 uci_blob_diff(tb_dev, otb_dev, &device_attr_list, &diff);
631 ret = DEV_CONFIG_RESTART;
633 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, otb_br,
634 blob_data(bst->config_data), blob_len(bst->config_data));
637 uci_blob_diff(tb_br, otb_br, &bridge_attr_list, &diff);
638 if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
639 ret = DEV_CONFIG_RESTART;
641 bridge_config_init(dev);
644 free(bst->config_data);
645 bst->config_data = attr;
650 bridge_retry_members(struct uloop_timeout *timeout)
652 struct bridge_state *bst = container_of(timeout, struct bridge_state, retry);
653 struct bridge_member *bm;
656 vlist_for_each_element(&bst->members, bm, node) {
660 if (!bm->dev.dev->present)
665 bridge_enable_member(bm);
669 static struct device *
670 bridge_create(const char *name, struct blob_attr *attr)
672 struct bridge_state *bst;
673 struct device *dev = NULL;
675 bst = calloc(1, sizeof(*bst));
680 device_init(dev, &bridge_device_type, name);
681 dev->config_pending = true;
682 bst->retry.cb = bridge_retry_members;
684 bst->set_state = dev->set_state;
685 dev->set_state = bridge_set_state;
687 dev->hotplug_ops = &bridge_ops;
689 vlist_init(&bst->members, avl_strcmp, bridge_member_update);
690 bst->members.keep_old = true;
691 bridge_reload(dev, attr);