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_member_cb(struct device_user *dev, enum device_event ev)
194 struct bridge_member *bm = container_of(dev, struct bridge_member, dev);
195 struct bridge_state *bst = bm->bst;
199 assert(!bm->present);
205 bridge_enable_member(bm);
206 else if (bst->n_present == 1)
207 device_set_present(&bst->dev, true);
210 case DEV_EVENT_REMOVE:
212 vlist_delete(&bst->members, &bm->node);
217 bridge_remove_member(bm);
226 bridge_set_down(struct bridge_state *bst)
228 struct bridge_member *bm;
230 bst->set_state(&bst->dev, false);
232 vlist_for_each_element(&bst->members, bm, node)
233 bridge_disable_member(bm);
235 system_bridge_delbr(&bst->dev);
241 bridge_set_up(struct bridge_state *bst)
243 struct bridge_member *bm;
246 if (!bst->force_active && !bst->n_present)
249 ret = system_bridge_addbr(&bst->dev, &bst->config);
253 vlist_for_each_element(&bst->members, bm, node)
254 bridge_enable_member(bm);
256 if (!bst->force_active && !bst->n_present) {
257 /* initialization of all member interfaces failed */
258 system_bridge_delbr(&bst->dev);
259 device_set_present(&bst->dev, false);
263 bridge_reset_primary(bst);
264 ret = bst->set_state(&bst->dev, true);
266 bridge_set_down(bst);
273 bridge_set_state(struct device *dev, bool up)
275 struct bridge_state *bst;
277 bst = container_of(dev, struct bridge_state, dev);
280 return bridge_set_up(bst);
282 return bridge_set_down(bst);
285 static struct bridge_member *
286 bridge_create_member(struct bridge_state *bst, struct device *dev, bool hotplug)
288 struct bridge_member *bm;
290 bm = calloc(1, sizeof(*bm) + strlen(dev->ifname) + 1);
292 bm->dev.cb = bridge_member_cb;
293 bm->dev.hotplug = hotplug;
294 strcpy(bm->name, dev->ifname);
296 vlist_add(&bst->members, &bm->node, bm->name);
298 bm->node.version = -1;
304 bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
305 struct vlist_node *node_old)
307 struct bridge_member *bm;
311 bm = container_of(node_new, struct bridge_member, node);
320 device_add_user(&bm->dev, dev);
325 bm = container_of(node_old, struct bridge_member, node);
326 bridge_remove_member(bm);
327 device_remove_user(&bm->dev);
334 bridge_add_member(struct bridge_state *bst, const char *name)
338 dev = device_get(name, true);
342 bridge_create_member(bst, dev, false);
346 bridge_hotplug_add(struct device *dev, struct device *member)
348 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
350 bridge_create_member(bst, member, true);
356 bridge_hotplug_del(struct device *dev, struct device *member)
358 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
359 struct bridge_member *bm;
361 bm = vlist_find(&bst->members, member->ifname, bm, node);
363 return UBUS_STATUS_NOT_FOUND;
365 vlist_delete(&bst->members, &bm->node);
370 bridge_hotplug_prepare(struct device *dev)
372 struct bridge_state *bst;
374 bst = container_of(dev, struct bridge_state, dev);
375 bst->force_active = true;
376 device_set_present(&bst->dev, true);
381 static const struct device_hotplug_ops bridge_ops = {
382 .prepare = bridge_hotplug_prepare,
383 .add = bridge_hotplug_add,
384 .del = bridge_hotplug_del
388 bridge_free(struct device *dev)
390 struct bridge_state *bst;
392 bst = container_of(dev, struct bridge_state, dev);
393 vlist_flush_all(&bst->members);
398 bridge_dump_info(struct device *dev, struct blob_buf *b)
400 struct bridge_state *bst;
401 struct bridge_member *bm;
404 bst = container_of(dev, struct bridge_state, dev);
406 system_if_dump_info(dev, b);
407 list = blobmsg_open_array(b, "bridge-members");
409 vlist_for_each_element(&bst->members, bm, node)
410 blobmsg_add_string(b, NULL, bm->dev.dev->ifname);
412 blobmsg_close_array(b, list);
416 bridge_config_init(struct device *dev)
418 struct bridge_state *bst;
419 struct blob_attr *cur;
422 bst = container_of(dev, struct bridge_state, dev);
427 vlist_update(&bst->members);
428 blobmsg_for_each_attr(cur, bst->ifnames, rem) {
429 bridge_add_member(bst, blobmsg_data(cur));
431 vlist_flush(&bst->members);
435 bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb)
437 struct bridge_config *cfg = &bst->config;
438 struct blob_attr *cur;
442 cfg->forward_delay = 2;
443 cfg->igmp_snoop = true;
445 if ((cur = tb[BRIDGE_ATTR_STP]))
446 cfg->stp = blobmsg_get_bool(cur);
448 if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY]))
449 cfg->forward_delay = blobmsg_get_u32(cur);
451 if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP]))
452 cfg->igmp_snoop = blobmsg_get_bool(cur);
454 if ((cur = tb[BRIDGE_ATTR_AGEING_TIME])) {
455 cfg->ageing_time = blobmsg_get_u32(cur);
456 cfg->flags |= BRIDGE_OPT_AGEING_TIME;
459 if ((cur = tb[BRIDGE_ATTR_HELLO_TIME])) {
460 cfg->hello_time = blobmsg_get_u32(cur);
461 cfg->flags |= BRIDGE_OPT_HELLO_TIME;
464 if ((cur = tb[BRIDGE_ATTR_MAX_AGE])) {
465 cfg->max_age = blobmsg_get_u32(cur);
466 cfg->flags |= BRIDGE_OPT_MAX_AGE;
471 bridge_reload(struct device *dev, struct blob_attr *attr)
473 struct blob_attr *tb_dev[__DEV_ATTR_MAX];
474 struct blob_attr *tb_br[__BRIDGE_ATTR_MAX];
475 enum dev_change_type ret = DEV_CONFIG_APPLIED;
477 struct bridge_state *bst;
479 BUILD_BUG_ON(sizeof(diff) < __BRIDGE_ATTR_MAX / 8);
480 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
482 bst = container_of(dev, struct bridge_state, dev);
484 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
485 blob_data(attr), blob_len(attr));
486 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, tb_br,
487 blob_data(attr), blob_len(attr));
489 bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
490 device_init_settings(dev, tb_dev);
491 bridge_apply_settings(bst, tb_br);
493 if (bst->config_data) {
494 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
495 struct blob_attr *otb_br[__BRIDGE_ATTR_MAX];
497 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
498 blob_data(bst->config_data), blob_len(bst->config_data));
501 config_diff(tb_dev, otb_dev, &device_attr_list, &diff);
502 if (diff & ~(1 << DEV_ATTR_IFNAME))
503 ret = DEV_CONFIG_RESTART;
505 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, otb_br,
506 blob_data(bst->config_data), blob_len(bst->config_data));
509 config_diff(tb_br, otb_br, &bridge_attr_list, &diff);
510 if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
511 ret = DEV_CONFIG_RESTART;
513 bridge_config_init(dev);
516 bst->config_data = attr;
520 static struct device *
521 bridge_create(const char *name, struct blob_attr *attr)
523 struct bridge_state *bst;
524 struct device *dev = NULL;
526 bst = calloc(1, sizeof(*bst));
531 device_init(dev, &bridge_device_type, name);
532 dev->config_pending = true;
534 bst->set_state = dev->set_state;
535 dev->set_state = bridge_set_state;
537 dev->hotplug_ops = &bridge_ops;
539 vlist_init(&bst->members, avl_strcmp, bridge_member_update);
540 bst->members.keep_old = true;
541 bridge_reload(dev, attr);