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,
29 BRIDGE_ATTR_IGMP_SNOOP,
30 BRIDGE_ATTR_AGEING_TIME,
31 BRIDGE_ATTR_HELLO_TIME,
36 static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = {
37 [BRIDGE_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY },
38 [BRIDGE_ATTR_STP] = { "stp", BLOBMSG_TYPE_BOOL },
39 [BRIDGE_ATTR_FORWARD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 },
40 [BRIDGE_ATTR_AGEING_TIME] = { "ageing_time", BLOBMSG_TYPE_INT32 },
41 [BRIDGE_ATTR_HELLO_TIME] = { "hello_time", BLOBMSG_TYPE_INT32 },
42 [BRIDGE_ATTR_MAX_AGE] = { "max_age", BLOBMSG_TYPE_INT32 },
43 [BRIDGE_ATTR_IGMP_SNOOP] = { "igmp_snooping", BLOBMSG_TYPE_BOOL },
46 static const union config_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = {
47 [BRIDGE_ATTR_IFNAME] = { .type = BLOBMSG_TYPE_STRING },
50 static const struct config_param_list bridge_attr_list = {
51 .n_params = __BRIDGE_ATTR_MAX,
52 .params = bridge_attrs,
53 .info = bridge_attr_info,
56 .next = { &device_attr_list },
59 static struct device *bridge_create(const char *name, struct blob_attr *attr);
60 static void bridge_config_init(struct device *dev);
61 static void bridge_free(struct device *dev);
62 static void bridge_dump_info(struct device *dev, struct blob_buf *b);
64 bridge_reload(struct device *dev, struct blob_attr *attr);
66 const struct device_type bridge_device_type = {
68 .config_params = &bridge_attr_list,
70 .create = bridge_create,
71 .config_init = bridge_config_init,
72 .reload = bridge_reload,
74 .dump_info = bridge_dump_info,
79 device_state_cb set_state;
81 struct blob_attr *config_data;
82 struct bridge_config config;
83 struct blob_attr *ifnames;
87 struct bridge_member *primary_port;
88 struct vlist_tree members;
92 struct bridge_member {
93 struct vlist_node node;
94 struct bridge_state *bst;
95 struct device_user dev;
101 bridge_reset_primary(struct bridge_state *bst)
103 struct bridge_member *bm;
105 if (!bst->primary_port &&
106 (bst->dev.settings.flags & DEV_OPT_MACADDR))
109 bst->primary_port = NULL;
110 bst->dev.settings.flags &= ~DEV_OPT_MACADDR;
111 vlist_for_each_element(&bst->members, bm, node) {
117 bst->primary_port = bm;
118 if (bm->dev.dev->settings.flags & DEV_OPT_MACADDR)
119 macaddr = bm->dev.dev->settings.macaddr;
121 macaddr = bm->dev.dev->orig_settings.macaddr;
122 memcpy(bst->dev.settings.macaddr, macaddr, 6);
123 bst->dev.settings.flags |= DEV_OPT_MACADDR;
129 bridge_disable_member(struct bridge_member *bm)
131 struct bridge_state *bst = bm->bst;
136 system_bridge_delif(&bst->dev, bm->dev.dev);
137 device_release(&bm->dev);
143 bridge_enable_member(struct bridge_member *bm)
145 struct bridge_state *bst = bm->bst;
151 ret = device_claim(&bm->dev);
155 ret = system_bridge_addif(&bst->dev, bm->dev.dev);
157 D(DEVICE, "Bridge device %s could not be added\n", bm->dev.dev->ifname);
170 bridge_remove_member(struct bridge_member *bm)
172 struct bridge_state *bst = bm->bst;
177 if (bm == bst->primary_port);
178 bridge_reset_primary(bst);
181 bridge_disable_member(bm);
184 bm->bst->n_present--;
186 bst->force_active = false;
187 if (bst->n_present == 0)
188 device_set_present(&bst->dev, false);
192 bridge_free_member(struct bridge_member *bm)
194 struct device *dev = bm->dev.dev;
196 bridge_remove_member(bm);
197 device_remove_user(&bm->dev);
200 * When reloading the config and moving a device from one bridge to
201 * another, the other bridge may have tried to claim this device
202 * before it was removed here.
203 * Ensure that claiming the device is retried by toggling its present
207 device_set_present(dev, false);
208 device_set_present(dev, true);
215 bridge_member_cb(struct device_user *dev, enum device_event ev)
217 struct bridge_member *bm = container_of(dev, struct bridge_member, dev);
218 struct bridge_state *bst = bm->bst;
222 assert(!bm->present);
228 bridge_enable_member(bm);
229 else if (bst->n_present == 1)
230 device_set_present(&bst->dev, true);
233 case DEV_EVENT_REMOVE:
235 vlist_delete(&bst->members, &bm->node);
240 bridge_remove_member(bm);
249 bridge_set_down(struct bridge_state *bst)
251 struct bridge_member *bm;
253 bst->set_state(&bst->dev, false);
255 vlist_for_each_element(&bst->members, bm, node)
256 bridge_disable_member(bm);
258 system_bridge_delbr(&bst->dev);
264 bridge_set_up(struct bridge_state *bst)
266 struct bridge_member *bm;
269 if (!bst->force_active && !bst->n_present)
272 ret = system_bridge_addbr(&bst->dev, &bst->config);
276 vlist_for_each_element(&bst->members, bm, node)
277 bridge_enable_member(bm);
279 if (!bst->force_active && !bst->n_present) {
280 /* initialization of all member interfaces failed */
281 system_bridge_delbr(&bst->dev);
282 device_set_present(&bst->dev, false);
286 bridge_reset_primary(bst);
287 ret = bst->set_state(&bst->dev, true);
289 bridge_set_down(bst);
296 bridge_set_state(struct device *dev, bool up)
298 struct bridge_state *bst;
300 bst = container_of(dev, struct bridge_state, dev);
303 return bridge_set_up(bst);
305 return bridge_set_down(bst);
308 static struct bridge_member *
309 bridge_create_member(struct bridge_state *bst, struct device *dev, bool hotplug)
311 struct bridge_member *bm;
313 bm = calloc(1, sizeof(*bm) + strlen(dev->ifname) + 1);
315 bm->dev.cb = bridge_member_cb;
316 bm->dev.hotplug = hotplug;
317 strcpy(bm->name, dev->ifname);
319 vlist_add(&bst->members, &bm->node, bm->name);
321 bm->node.version = -1;
327 bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
328 struct vlist_node *node_old)
330 struct bridge_member *bm;
334 bm = container_of(node_new, struct bridge_member, node);
343 device_add_user(&bm->dev, dev);
348 bm = container_of(node_old, struct bridge_member, node);
349 bridge_free_member(bm);
355 bridge_add_member(struct bridge_state *bst, const char *name)
359 dev = device_get(name, true);
363 bridge_create_member(bst, dev, false);
367 bridge_hotplug_add(struct device *dev, struct device *member)
369 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
371 bridge_create_member(bst, member, true);
377 bridge_hotplug_del(struct device *dev, struct device *member)
379 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
380 struct bridge_member *bm;
382 bm = vlist_find(&bst->members, member->ifname, bm, node);
384 return UBUS_STATUS_NOT_FOUND;
386 vlist_delete(&bst->members, &bm->node);
391 bridge_hotplug_prepare(struct device *dev)
393 struct bridge_state *bst;
395 bst = container_of(dev, struct bridge_state, dev);
396 bst->force_active = true;
397 device_set_present(&bst->dev, true);
402 static const struct device_hotplug_ops bridge_ops = {
403 .prepare = bridge_hotplug_prepare,
404 .add = bridge_hotplug_add,
405 .del = bridge_hotplug_del
409 bridge_free(struct device *dev)
411 struct bridge_state *bst;
413 bst = container_of(dev, struct bridge_state, dev);
414 vlist_flush_all(&bst->members);
419 bridge_dump_info(struct device *dev, struct blob_buf *b)
421 struct bridge_state *bst;
422 struct bridge_member *bm;
425 bst = container_of(dev, struct bridge_state, dev);
427 system_if_dump_info(dev, b);
428 list = blobmsg_open_array(b, "bridge-members");
430 vlist_for_each_element(&bst->members, bm, node)
431 blobmsg_add_string(b, NULL, bm->dev.dev->ifname);
433 blobmsg_close_array(b, list);
437 bridge_config_init(struct device *dev)
439 struct bridge_state *bst;
440 struct blob_attr *cur;
443 bst = container_of(dev, struct bridge_state, dev);
448 vlist_update(&bst->members);
449 blobmsg_for_each_attr(cur, bst->ifnames, rem) {
450 bridge_add_member(bst, blobmsg_data(cur));
452 vlist_flush(&bst->members);
456 bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb)
458 struct bridge_config *cfg = &bst->config;
459 struct blob_attr *cur;
463 cfg->forward_delay = 2;
464 cfg->igmp_snoop = true;
466 if ((cur = tb[BRIDGE_ATTR_STP]))
467 cfg->stp = blobmsg_get_bool(cur);
469 if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY]))
470 cfg->forward_delay = blobmsg_get_u32(cur);
472 if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP]))
473 cfg->igmp_snoop = blobmsg_get_bool(cur);
475 if ((cur = tb[BRIDGE_ATTR_AGEING_TIME])) {
476 cfg->ageing_time = blobmsg_get_u32(cur);
477 cfg->flags |= BRIDGE_OPT_AGEING_TIME;
480 if ((cur = tb[BRIDGE_ATTR_HELLO_TIME])) {
481 cfg->hello_time = blobmsg_get_u32(cur);
482 cfg->flags |= BRIDGE_OPT_HELLO_TIME;
485 if ((cur = tb[BRIDGE_ATTR_MAX_AGE])) {
486 cfg->max_age = blobmsg_get_u32(cur);
487 cfg->flags |= BRIDGE_OPT_MAX_AGE;
492 bridge_reload(struct device *dev, struct blob_attr *attr)
494 struct blob_attr *tb_dev[__DEV_ATTR_MAX];
495 struct blob_attr *tb_br[__BRIDGE_ATTR_MAX];
496 enum dev_change_type ret = DEV_CONFIG_APPLIED;
498 struct bridge_state *bst;
500 BUILD_BUG_ON(sizeof(diff) < __BRIDGE_ATTR_MAX / 8);
501 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
503 bst = container_of(dev, struct bridge_state, dev);
505 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
506 blob_data(attr), blob_len(attr));
507 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, tb_br,
508 blob_data(attr), blob_len(attr));
510 bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
511 device_init_settings(dev, tb_dev);
512 bridge_apply_settings(bst, tb_br);
514 if (bst->config_data) {
515 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
516 struct blob_attr *otb_br[__BRIDGE_ATTR_MAX];
518 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
519 blob_data(bst->config_data), blob_len(bst->config_data));
522 config_diff(tb_dev, otb_dev, &device_attr_list, &diff);
523 if (diff & ~(1 << DEV_ATTR_IFNAME))
524 ret = DEV_CONFIG_RESTART;
526 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, otb_br,
527 blob_data(bst->config_data), blob_len(bst->config_data));
530 config_diff(tb_br, otb_br, &bridge_attr_list, &diff);
531 if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
532 ret = DEV_CONFIG_RESTART;
534 bridge_config_init(dev);
537 bst->config_data = attr;
541 static struct device *
542 bridge_create(const char *name, struct blob_attr *attr)
544 struct bridge_state *bst;
545 struct device *dev = NULL;
547 bst = calloc(1, sizeof(*bst));
552 device_init(dev, &bridge_device_type, name);
553 dev->config_pending = true;
555 bst->set_state = dev->set_state;
556 dev->set_state = bridge_set_state;
558 dev->hotplug_ops = &bridge_ops;
560 vlist_init(&bst->members, avl_strcmp, bridge_member_update);
561 bst->members.keep_old = true;
562 bridge_reload(dev, attr);