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,
39 static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = {
40 [BRIDGE_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
41 [BRIDGE_ATTR_STP] = { "stp", BLOBMSG_TYPE_BOOL },
42 [BRIDGE_ATTR_FORWARD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 },
43 [BRIDGE_ATTR_PRIORITY] = { "priority", BLOBMSG_TYPE_INT32 },
44 [BRIDGE_ATTR_AGEING_TIME] = { "ageing_time", BLOBMSG_TYPE_INT32 },
45 [BRIDGE_ATTR_HELLO_TIME] = { "hello_time", BLOBMSG_TYPE_INT32 },
46 [BRIDGE_ATTR_MAX_AGE] = { "max_age", BLOBMSG_TYPE_INT32 },
47 [BRIDGE_ATTR_IGMP_SNOOP] = { "igmp_snooping", BLOBMSG_TYPE_BOOL },
48 [BRIDGE_ATTR_BRIDGE_EMPTY] = { "bridge_empty", BLOBMSG_TYPE_BOOL },
49 [BRIDGE_ATTR_MULTICAST_QUERIER] = { "multicast_querier", BLOBMSG_TYPE_BOOL },
52 static const struct uci_blob_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = {
53 [BRIDGE_ATTR_IFNAME] = { .type = BLOBMSG_TYPE_STRING },
56 static const struct uci_blob_param_list bridge_attr_list = {
57 .n_params = __BRIDGE_ATTR_MAX,
58 .params = bridge_attrs,
59 .info = bridge_attr_info,
62 .next = { &device_attr_list },
65 static struct device *bridge_create(const char *name, struct blob_attr *attr);
66 static void bridge_config_init(struct device *dev);
67 static void bridge_free(struct device *dev);
68 static void bridge_dump_info(struct device *dev, struct blob_buf *b);
70 bridge_reload(struct device *dev, struct blob_attr *attr);
72 const struct device_type bridge_device_type = {
74 .config_params = &bridge_attr_list,
76 .create = bridge_create,
77 .config_init = bridge_config_init,
78 .reload = bridge_reload,
80 .dump_info = bridge_dump_info,
85 device_state_cb set_state;
87 struct blob_attr *config_data;
88 struct bridge_config config;
89 struct blob_attr *ifnames;
93 struct uloop_timeout retry;
94 struct bridge_member *primary_port;
95 struct vlist_tree members;
100 struct bridge_member {
101 struct vlist_node node;
102 struct bridge_state *bst;
103 struct device_user dev;
109 bridge_reset_primary(struct bridge_state *bst)
111 struct bridge_member *bm;
113 if (!bst->primary_port &&
114 (bst->dev.settings.flags & DEV_OPT_MACADDR))
117 bst->primary_port = NULL;
118 bst->dev.settings.flags &= ~DEV_OPT_MACADDR;
119 vlist_for_each_element(&bst->members, bm, node) {
125 bst->primary_port = bm;
126 if (bm->dev.dev->settings.flags & DEV_OPT_MACADDR)
127 macaddr = bm->dev.dev->settings.macaddr;
129 macaddr = bm->dev.dev->orig_settings.macaddr;
130 memcpy(bst->dev.settings.macaddr, macaddr, 6);
131 bst->dev.settings.flags |= DEV_OPT_MACADDR;
137 bridge_disable_member(struct bridge_member *bm)
139 struct bridge_state *bst = bm->bst;
144 system_bridge_delif(&bst->dev, bm->dev.dev);
145 device_release(&bm->dev);
147 device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
153 bridge_enable_interface(struct bridge_state *bst)
160 ret = system_bridge_addbr(&bst->dev, &bst->config);
169 bridge_disable_interface(struct bridge_state *bst)
174 system_bridge_delbr(&bst->dev);
179 bridge_enable_member(struct bridge_member *bm)
181 struct bridge_state *bst = bm->bst;
187 ret = bridge_enable_interface(bst);
191 /* Disable IPv6 for bridge members */
192 if (!(bm->dev.dev->settings.flags & DEV_OPT_IPV6)) {
193 bm->dev.dev->settings.ipv6 = 0;
194 bm->dev.dev->settings.flags |= DEV_OPT_IPV6;
197 ret = device_claim(&bm->dev);
201 ret = system_bridge_addif(&bst->dev, bm->dev.dev);
203 D(DEVICE, "Bridge device %s could not be added\n", bm->dev.dev->ifname);
207 device_set_present(&bst->dev, true);
208 device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE);
216 device_release(&bm->dev);
222 bridge_remove_member(struct bridge_member *bm)
224 struct bridge_state *bst = bm->bst;
229 if (bm == bst->primary_port)
230 bridge_reset_primary(bst);
233 bridge_disable_member(bm);
236 bm->bst->n_present--;
238 if (bst->config.bridge_empty)
241 bst->force_active = false;
242 if (bst->n_present == 0)
243 device_set_present(&bst->dev, false);
247 bridge_free_member(struct bridge_member *bm)
249 struct device *dev = bm->dev.dev;
251 bridge_remove_member(bm);
252 device_remove_user(&bm->dev);
255 * When reloading the config and moving a device from one bridge to
256 * another, the other bridge may have tried to claim this device
257 * before it was removed here.
258 * Ensure that claiming the device is retried by toggling its present
262 device_set_present(dev, false);
263 device_set_present(dev, true);
270 bridge_check_retry(struct bridge_state *bst)
275 uloop_timeout_set(&bst->retry, 100);
279 bridge_member_cb(struct device_user *dev, enum device_event ev)
281 struct bridge_member *bm = container_of(dev, struct bridge_member, dev);
282 struct bridge_state *bst = bm->bst;
286 assert(!bm->present);
291 if (bst->n_present == 1)
292 device_set_present(&bst->dev, true);
293 if (bst->dev.active && !bridge_enable_member(bm)) {
295 * Adding a bridge member can overwrite the bridge mtu
296 * in the kernel, apply the bridge settings in case the
299 system_if_apply_settings(&bst->dev, &bst->dev.settings,
304 case DEV_EVENT_REMOVE:
306 vlist_delete(&bst->members, &bm->node);
311 bridge_remove_member(bm);
320 bridge_set_down(struct bridge_state *bst)
322 struct bridge_member *bm;
324 bst->set_state(&bst->dev, false);
326 vlist_for_each_element(&bst->members, bm, node)
327 bridge_disable_member(bm);
329 bridge_disable_interface(bst);
335 bridge_set_up(struct bridge_state *bst)
337 struct bridge_member *bm;
340 if (!bst->n_present) {
341 if (!bst->force_active)
344 ret = bridge_enable_interface(bst);
350 vlist_for_each_element(&bst->members, bm, node)
351 bridge_enable_member(bm);
352 bridge_check_retry(bst);
354 if (!bst->force_active && !bst->n_present) {
355 /* initialization of all member interfaces failed */
356 bridge_disable_interface(bst);
357 device_set_present(&bst->dev, false);
361 bridge_reset_primary(bst);
362 ret = bst->set_state(&bst->dev, true);
364 bridge_set_down(bst);
370 bridge_set_state(struct device *dev, bool up)
372 struct bridge_state *bst;
374 bst = container_of(dev, struct bridge_state, dev);
377 return bridge_set_up(bst);
379 return bridge_set_down(bst);
382 static struct bridge_member *
383 bridge_create_member(struct bridge_state *bst, struct device *dev, bool hotplug)
385 struct bridge_member *bm;
387 bm = calloc(1, sizeof(*bm) + strlen(dev->ifname) + 1);
392 bm->dev.cb = bridge_member_cb;
393 bm->dev.hotplug = hotplug;
394 strcpy(bm->name, dev->ifname);
396 vlist_add(&bst->members, &bm->node, bm->name);
397 // Need to look up the bridge member again as the above
398 // created pointer will be freed in case the bridge member
400 bm = vlist_find(&bst->members, dev->ifname, bm, node);
402 bm->node.version = -1;
408 bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
409 struct vlist_node *node_old)
411 struct bridge_member *bm;
415 bm = container_of(node_new, struct bridge_member, node);
424 device_add_user(&bm->dev, dev);
429 bm = container_of(node_old, struct bridge_member, node);
430 bridge_free_member(bm);
436 bridge_add_member(struct bridge_state *bst, const char *name)
440 dev = device_get(name, true);
444 bridge_create_member(bst, dev, false);
448 bridge_hotplug_add(struct device *dev, struct device *member)
450 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
452 bridge_create_member(bst, member, true);
458 bridge_hotplug_del(struct device *dev, struct device *member)
460 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
461 struct bridge_member *bm;
463 bm = vlist_find(&bst->members, member->ifname, bm, node);
465 return UBUS_STATUS_NOT_FOUND;
467 vlist_delete(&bst->members, &bm->node);
472 bridge_hotplug_prepare(struct device *dev)
474 struct bridge_state *bst;
476 bst = container_of(dev, struct bridge_state, dev);
477 bst->force_active = true;
478 device_set_present(&bst->dev, true);
483 static const struct device_hotplug_ops bridge_ops = {
484 .prepare = bridge_hotplug_prepare,
485 .add = bridge_hotplug_add,
486 .del = bridge_hotplug_del
490 bridge_free(struct device *dev)
492 struct bridge_state *bst;
494 bst = container_of(dev, struct bridge_state, dev);
495 vlist_flush_all(&bst->members);
496 free(bst->config_data);
501 bridge_dump_info(struct device *dev, struct blob_buf *b)
503 struct bridge_state *bst;
504 struct bridge_member *bm;
507 bst = container_of(dev, struct bridge_state, dev);
509 system_if_dump_info(dev, b);
510 list = blobmsg_open_array(b, "bridge-members");
512 vlist_for_each_element(&bst->members, bm, node)
513 blobmsg_add_string(b, NULL, bm->dev.dev->ifname);
515 blobmsg_close_array(b, list);
519 bridge_config_init(struct device *dev)
521 struct bridge_state *bst;
522 struct blob_attr *cur;
525 bst = container_of(dev, struct bridge_state, dev);
527 if (bst->config.bridge_empty) {
528 bst->force_active = true;
529 device_set_present(&bst->dev, true);
533 vlist_update(&bst->members);
535 blobmsg_for_each_attr(cur, bst->ifnames, rem) {
536 bridge_add_member(bst, blobmsg_data(cur));
539 vlist_flush(&bst->members);
540 bridge_check_retry(bst);
544 bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb)
546 struct bridge_config *cfg = &bst->config;
547 struct blob_attr *cur;
551 cfg->forward_delay = 2;
552 cfg->igmp_snoop = true;
553 cfg->multicast_querier = true;
554 cfg->bridge_empty = false;
555 cfg->priority = 0x7FFF;
557 if ((cur = tb[BRIDGE_ATTR_STP]))
558 cfg->stp = blobmsg_get_bool(cur);
560 if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY]))
561 cfg->forward_delay = blobmsg_get_u32(cur);
563 if ((cur = tb[BRIDGE_ATTR_PRIORITY]))
564 cfg->priority = blobmsg_get_u32(cur);
566 if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP]))
567 cfg->multicast_querier = cfg->igmp_snoop = blobmsg_get_bool(cur);
569 if ((cur = tb[BRIDGE_ATTR_MULTICAST_QUERIER]))
570 cfg->multicast_querier = blobmsg_get_bool(cur);
572 if ((cur = tb[BRIDGE_ATTR_AGEING_TIME])) {
573 cfg->ageing_time = blobmsg_get_u32(cur);
574 cfg->flags |= BRIDGE_OPT_AGEING_TIME;
577 if ((cur = tb[BRIDGE_ATTR_HELLO_TIME])) {
578 cfg->hello_time = blobmsg_get_u32(cur);
579 cfg->flags |= BRIDGE_OPT_HELLO_TIME;
582 if ((cur = tb[BRIDGE_ATTR_MAX_AGE])) {
583 cfg->max_age = blobmsg_get_u32(cur);
584 cfg->flags |= BRIDGE_OPT_MAX_AGE;
587 if ((cur = tb[BRIDGE_ATTR_BRIDGE_EMPTY]))
588 cfg->bridge_empty = blobmsg_get_bool(cur);
592 bridge_reload(struct device *dev, struct blob_attr *attr)
594 struct blob_attr *tb_dev[__DEV_ATTR_MAX];
595 struct blob_attr *tb_br[__BRIDGE_ATTR_MAX];
596 enum dev_change_type ret = DEV_CONFIG_APPLIED;
598 struct bridge_state *bst;
600 BUILD_BUG_ON(sizeof(diff) < __BRIDGE_ATTR_MAX / 8);
601 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
603 bst = container_of(dev, struct bridge_state, dev);
604 attr = blob_memdup(attr);
606 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
607 blob_data(attr), blob_len(attr));
608 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, tb_br,
609 blob_data(attr), blob_len(attr));
611 bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
612 device_init_settings(dev, tb_dev);
613 bridge_apply_settings(bst, tb_br);
615 if (bst->config_data) {
616 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
617 struct blob_attr *otb_br[__BRIDGE_ATTR_MAX];
619 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
620 blob_data(bst->config_data), blob_len(bst->config_data));
623 uci_blob_diff(tb_dev, otb_dev, &device_attr_list, &diff);
625 ret = DEV_CONFIG_RESTART;
627 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, otb_br,
628 blob_data(bst->config_data), blob_len(bst->config_data));
631 uci_blob_diff(tb_br, otb_br, &bridge_attr_list, &diff);
632 if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
633 ret = DEV_CONFIG_RESTART;
635 bridge_config_init(dev);
638 free(bst->config_data);
639 bst->config_data = attr;
644 bridge_retry_members(struct uloop_timeout *timeout)
646 struct bridge_state *bst = container_of(timeout, struct bridge_state, retry);
647 struct bridge_member *bm;
650 vlist_for_each_element(&bst->members, bm, node) {
654 if (!bm->dev.dev->present)
659 bridge_enable_member(bm);
663 static struct device *
664 bridge_create(const char *name, struct blob_attr *attr)
666 struct bridge_state *bst;
667 struct device *dev = NULL;
669 bst = calloc(1, sizeof(*bst));
674 device_init(dev, &bridge_device_type, name);
675 dev->config_pending = true;
676 bst->retry.cb = bridge_retry_members;
678 bst->set_state = dev->set_state;
679 dev->set_state = bridge_set_state;
681 dev->hotplug_ops = &bridge_ops;
683 vlist_init(&bst->members, avl_strcmp, bridge_member_update);
684 bst->members.keep_old = true;
685 bridge_reload(dev, attr);