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);
187 bridge_remove_member(struct bridge_member *bm)
189 struct bridge_state *bst = bm->bst;
194 if (bm == bst->primary_port)
195 bridge_reset_primary(bst);
198 bridge_disable_member(bm);
201 bm->bst->n_present--;
203 if (bst->config.bridge_empty)
206 bst->force_active = false;
207 if (bst->n_present == 0)
208 device_set_present(&bst->dev, false);
212 bridge_free_member(struct bridge_member *bm)
214 struct device *dev = bm->dev.dev;
216 bridge_remove_member(bm);
217 device_remove_user(&bm->dev);
220 * When reloading the config and moving a device from one bridge to
221 * another, the other bridge may have tried to claim this device
222 * before it was removed here.
223 * Ensure that claiming the device is retried by toggling its present
227 device_set_present(dev, false);
228 device_set_present(dev, true);
235 bridge_check_retry(struct bridge_state *bst)
240 uloop_timeout_set(&bst->retry, 100);
244 bridge_member_cb(struct device_user *dev, enum device_event ev)
246 struct bridge_member *bm = container_of(dev, struct bridge_member, dev);
247 struct bridge_state *bst = bm->bst;
251 assert(!bm->present);
256 if (bst->n_present == 1)
257 device_set_present(&bst->dev, true);
258 if (bst->dev.active && !bridge_enable_member(bm)) {
260 * Adding a bridge member can overwrite the bridge mtu
261 * in the kernel, apply the bridge settings in case the
264 system_if_apply_settings(&bst->dev, &bst->dev.settings,
269 case DEV_EVENT_REMOVE:
271 vlist_delete(&bst->members, &bm->node);
276 bridge_remove_member(bm);
285 bridge_set_down(struct bridge_state *bst)
287 struct bridge_member *bm;
289 bst->set_state(&bst->dev, false);
291 vlist_for_each_element(&bst->members, bm, node)
292 bridge_disable_member(bm);
294 system_bridge_delbr(&bst->dev);
300 bridge_set_up(struct bridge_state *bst)
302 struct bridge_member *bm;
305 if (!bst->force_active && !bst->n_present)
308 ret = system_bridge_addbr(&bst->dev, &bst->config);
313 vlist_for_each_element(&bst->members, bm, node)
314 bridge_enable_member(bm);
315 bridge_check_retry(bst);
317 if (!bst->force_active && !bst->n_present) {
318 /* initialization of all member interfaces failed */
319 system_bridge_delbr(&bst->dev);
320 device_set_present(&bst->dev, false);
324 bridge_reset_primary(bst);
325 ret = bst->set_state(&bst->dev, true);
327 bridge_set_down(bst);
334 bridge_set_state(struct device *dev, bool up)
336 struct bridge_state *bst;
338 bst = container_of(dev, struct bridge_state, dev);
341 return bridge_set_up(bst);
343 return bridge_set_down(bst);
346 static struct bridge_member *
347 bridge_create_member(struct bridge_state *bst, struct device *dev, bool hotplug)
349 struct bridge_member *bm;
351 bm = calloc(1, sizeof(*bm) + strlen(dev->ifname) + 1);
356 bm->dev.cb = bridge_member_cb;
357 bm->dev.hotplug = hotplug;
358 strcpy(bm->name, dev->ifname);
360 vlist_add(&bst->members, &bm->node, bm->name);
361 // Need to look up the bridge member again as the above
362 // created pointer will be freed in case the bridge member
364 bm = vlist_find(&bst->members, dev->ifname, bm, node);
366 bm->node.version = -1;
372 bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
373 struct vlist_node *node_old)
375 struct bridge_member *bm;
379 bm = container_of(node_new, struct bridge_member, node);
388 device_add_user(&bm->dev, dev);
393 bm = container_of(node_old, struct bridge_member, node);
394 bridge_free_member(bm);
400 bridge_add_member(struct bridge_state *bst, const char *name)
404 dev = device_get(name, true);
408 bridge_create_member(bst, dev, false);
412 bridge_hotplug_add(struct device *dev, struct device *member)
414 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
416 bridge_create_member(bst, member, true);
422 bridge_hotplug_del(struct device *dev, struct device *member)
424 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
425 struct bridge_member *bm;
427 bm = vlist_find(&bst->members, member->ifname, bm, node);
429 return UBUS_STATUS_NOT_FOUND;
431 vlist_delete(&bst->members, &bm->node);
436 bridge_hotplug_prepare(struct device *dev)
438 struct bridge_state *bst;
440 bst = container_of(dev, struct bridge_state, dev);
441 bst->force_active = true;
442 device_set_present(&bst->dev, true);
447 static const struct device_hotplug_ops bridge_ops = {
448 .prepare = bridge_hotplug_prepare,
449 .add = bridge_hotplug_add,
450 .del = bridge_hotplug_del
454 bridge_free(struct device *dev)
456 struct bridge_state *bst;
458 bst = container_of(dev, struct bridge_state, dev);
459 vlist_flush_all(&bst->members);
464 bridge_dump_info(struct device *dev, struct blob_buf *b)
466 struct bridge_state *bst;
467 struct bridge_member *bm;
470 bst = container_of(dev, struct bridge_state, dev);
472 system_if_dump_info(dev, b);
473 list = blobmsg_open_array(b, "bridge-members");
475 vlist_for_each_element(&bst->members, bm, node)
476 blobmsg_add_string(b, NULL, bm->dev.dev->ifname);
478 blobmsg_close_array(b, list);
482 bridge_config_init(struct device *dev)
484 struct bridge_state *bst;
485 struct blob_attr *cur;
488 bst = container_of(dev, struct bridge_state, dev);
490 if (bst->config.bridge_empty) {
491 bst->force_active = true;
492 device_set_present(&bst->dev, true);
496 vlist_update(&bst->members);
498 blobmsg_for_each_attr(cur, bst->ifnames, rem) {
499 bridge_add_member(bst, blobmsg_data(cur));
502 vlist_flush(&bst->members);
503 bridge_check_retry(bst);
507 bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb)
509 struct bridge_config *cfg = &bst->config;
510 struct blob_attr *cur;
514 cfg->forward_delay = 2;
515 cfg->igmp_snoop = true;
516 cfg->bridge_empty = false;
517 cfg->priority = 0x7FFF;
519 if ((cur = tb[BRIDGE_ATTR_STP]))
520 cfg->stp = blobmsg_get_bool(cur);
522 if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY]))
523 cfg->forward_delay = blobmsg_get_u32(cur);
525 if ((cur = tb[BRIDGE_ATTR_PRIORITY]))
526 cfg->priority = blobmsg_get_u32(cur);
528 if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP]))
529 cfg->igmp_snoop = blobmsg_get_bool(cur);
531 if ((cur = tb[BRIDGE_ATTR_AGEING_TIME])) {
532 cfg->ageing_time = blobmsg_get_u32(cur);
533 cfg->flags |= BRIDGE_OPT_AGEING_TIME;
536 if ((cur = tb[BRIDGE_ATTR_HELLO_TIME])) {
537 cfg->hello_time = blobmsg_get_u32(cur);
538 cfg->flags |= BRIDGE_OPT_HELLO_TIME;
541 if ((cur = tb[BRIDGE_ATTR_MAX_AGE])) {
542 cfg->max_age = blobmsg_get_u32(cur);
543 cfg->flags |= BRIDGE_OPT_MAX_AGE;
546 if ((cur = tb[BRIDGE_ATTR_BRIDGE_EMPTY]))
547 cfg->bridge_empty = blobmsg_get_bool(cur);
551 bridge_reload(struct device *dev, struct blob_attr *attr)
553 struct blob_attr *tb_dev[__DEV_ATTR_MAX];
554 struct blob_attr *tb_br[__BRIDGE_ATTR_MAX];
555 enum dev_change_type ret = DEV_CONFIG_APPLIED;
557 struct bridge_state *bst;
559 BUILD_BUG_ON(sizeof(diff) < __BRIDGE_ATTR_MAX / 8);
560 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
562 bst = container_of(dev, struct bridge_state, dev);
564 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
565 blob_data(attr), blob_len(attr));
566 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, tb_br,
567 blob_data(attr), blob_len(attr));
569 bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
570 device_init_settings(dev, tb_dev);
571 bridge_apply_settings(bst, tb_br);
573 if (bst->config_data) {
574 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
575 struct blob_attr *otb_br[__BRIDGE_ATTR_MAX];
577 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
578 blob_data(bst->config_data), blob_len(bst->config_data));
581 uci_blob_diff(tb_dev, otb_dev, &device_attr_list, &diff);
582 if (diff & ~(1 << DEV_ATTR_IFNAME))
583 ret = DEV_CONFIG_RESTART;
585 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, otb_br,
586 blob_data(bst->config_data), blob_len(bst->config_data));
589 uci_blob_diff(tb_br, otb_br, &bridge_attr_list, &diff);
590 if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
591 ret = DEV_CONFIG_RESTART;
593 bridge_config_init(dev);
596 bst->config_data = attr;
601 bridge_retry_members(struct uloop_timeout *timeout)
603 struct bridge_state *bst = container_of(timeout, struct bridge_state, retry);
604 struct bridge_member *bm;
607 vlist_for_each_element(&bst->members, bm, node) {
611 if (!bm->dev.dev->present)
615 bridge_enable_member(bm);
619 static struct device *
620 bridge_create(const char *name, struct blob_attr *attr)
622 struct bridge_state *bst;
623 struct device *dev = NULL;
625 bst = calloc(1, sizeof(*bst));
630 device_init(dev, &bridge_device_type, name);
631 dev->config_pending = true;
632 bst->retry.cb = bridge_retry_members;
634 bst->set_state = dev->set_state;
635 dev->set_state = bridge_set_state;
637 dev->hotplug_ops = &bridge_ops;
639 vlist_init(&bst->members, avl_strcmp, bridge_member_update);
640 bst->members.keep_old = true;
641 bridge_reload(dev, attr);