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) {
115 bst->primary_port = bm;
116 memcpy(bst->dev.settings.macaddr, bm->dev.dev->settings.macaddr, 6);
117 bst->dev.settings.flags |= DEV_OPT_MACADDR;
123 bridge_disable_member(struct bridge_member *bm)
125 struct bridge_state *bst = bm->bst;
130 system_bridge_delif(&bst->dev, bm->dev.dev);
131 device_release(&bm->dev);
137 bridge_enable_member(struct bridge_member *bm)
139 struct bridge_state *bst = bm->bst;
145 ret = device_claim(&bm->dev);
149 ret = system_bridge_addif(&bst->dev, bm->dev.dev);
151 D(DEVICE, "Bridge device %s could not be added\n", bm->dev.dev->ifname);
164 bridge_remove_member(struct bridge_member *bm)
166 struct bridge_state *bst = bm->bst;
171 if (bm == bst->primary_port);
172 bridge_reset_primary(bst);
175 bridge_disable_member(bm);
178 bm->bst->n_present--;
180 bst->force_active = false;
181 if (bst->n_present == 0)
182 device_set_present(&bst->dev, false);
186 bridge_member_cb(struct device_user *dev, enum device_event ev)
188 struct bridge_member *bm = container_of(dev, struct bridge_member, dev);
189 struct bridge_state *bst = bm->bst;
193 assert(!bm->present);
199 bridge_enable_member(bm);
200 else if (bst->n_present == 1)
201 device_set_present(&bst->dev, true);
204 case DEV_EVENT_REMOVE:
206 vlist_delete(&bst->members, &bm->node);
211 bridge_remove_member(bm);
220 bridge_set_down(struct bridge_state *bst)
222 struct bridge_member *bm;
224 bst->set_state(&bst->dev, false);
226 vlist_for_each_element(&bst->members, bm, node)
227 bridge_disable_member(bm);
229 system_bridge_delbr(&bst->dev);
235 bridge_set_up(struct bridge_state *bst)
237 struct bridge_member *bm;
240 if (!bst->force_active && !bst->n_present)
243 ret = system_bridge_addbr(&bst->dev, &bst->config);
247 vlist_for_each_element(&bst->members, bm, node)
248 bridge_enable_member(bm);
250 if (!bst->force_active && !bst->n_present) {
251 /* initialization of all member interfaces failed */
252 system_bridge_delbr(&bst->dev);
253 device_set_present(&bst->dev, false);
257 bridge_reset_primary(bst);
258 ret = bst->set_state(&bst->dev, true);
260 bridge_set_down(bst);
267 bridge_set_state(struct device *dev, bool up)
269 struct bridge_state *bst;
271 bst = container_of(dev, struct bridge_state, dev);
274 return bridge_set_up(bst);
276 return bridge_set_down(bst);
279 static struct bridge_member *
280 bridge_create_member(struct bridge_state *bst, struct device *dev, bool hotplug)
282 struct bridge_member *bm;
284 bm = calloc(1, sizeof(*bm) + strlen(dev->ifname) + 1);
286 bm->dev.cb = bridge_member_cb;
287 bm->dev.hotplug = hotplug;
288 strcpy(bm->name, dev->ifname);
290 vlist_add(&bst->members, &bm->node, bm->name);
292 bm->node.version = -1;
298 bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new,
299 struct vlist_node *node_old)
301 struct bridge_member *bm;
305 bm = container_of(node_new, struct bridge_member, node);
314 device_add_user(&bm->dev, dev);
319 bm = container_of(node_old, struct bridge_member, node);
320 bridge_remove_member(bm);
321 device_remove_user(&bm->dev);
328 bridge_add_member(struct bridge_state *bst, const char *name)
332 dev = device_get(name, true);
336 bridge_create_member(bst, dev, false);
340 bridge_hotplug_add(struct device *dev, struct device *member)
342 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
344 bridge_create_member(bst, member, true);
350 bridge_hotplug_del(struct device *dev, struct device *member)
352 struct bridge_state *bst = container_of(dev, struct bridge_state, dev);
353 struct bridge_member *bm;
355 bm = vlist_find(&bst->members, member->ifname, bm, node);
357 return UBUS_STATUS_NOT_FOUND;
359 vlist_delete(&bst->members, &bm->node);
364 bridge_hotplug_prepare(struct device *dev)
366 struct bridge_state *bst;
368 bst = container_of(dev, struct bridge_state, dev);
369 bst->force_active = true;
370 device_set_present(&bst->dev, true);
375 static const struct device_hotplug_ops bridge_ops = {
376 .prepare = bridge_hotplug_prepare,
377 .add = bridge_hotplug_add,
378 .del = bridge_hotplug_del
382 bridge_free(struct device *dev)
384 struct bridge_state *bst;
386 bst = container_of(dev, struct bridge_state, dev);
387 vlist_flush_all(&bst->members);
392 bridge_dump_info(struct device *dev, struct blob_buf *b)
394 struct bridge_state *bst;
395 struct bridge_member *bm;
398 bst = container_of(dev, struct bridge_state, dev);
400 system_if_dump_info(dev, b);
401 list = blobmsg_open_array(b, "bridge-members");
403 vlist_for_each_element(&bst->members, bm, node)
404 blobmsg_add_string(b, NULL, bm->dev.dev->ifname);
406 blobmsg_close_array(b, list);
410 bridge_config_init(struct device *dev)
412 struct bridge_state *bst;
413 struct blob_attr *cur;
416 bst = container_of(dev, struct bridge_state, dev);
421 vlist_update(&bst->members);
422 blobmsg_for_each_attr(cur, bst->ifnames, rem) {
423 bridge_add_member(bst, blobmsg_data(cur));
425 vlist_flush(&bst->members);
429 bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb)
431 struct bridge_config *cfg = &bst->config;
432 struct blob_attr *cur;
436 cfg->forward_delay = 2;
437 cfg->igmp_snoop = true;
439 if ((cur = tb[BRIDGE_ATTR_STP]))
440 cfg->stp = blobmsg_get_bool(cur);
442 if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY]))
443 cfg->forward_delay = blobmsg_get_u32(cur);
445 if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP]))
446 cfg->igmp_snoop = blobmsg_get_bool(cur);
448 if ((cur = tb[BRIDGE_ATTR_AGEING_TIME])) {
449 cfg->ageing_time = blobmsg_get_u32(cur);
450 cfg->flags |= BRIDGE_OPT_AGEING_TIME;
453 if ((cur = tb[BRIDGE_ATTR_HELLO_TIME])) {
454 cfg->hello_time = blobmsg_get_u32(cur);
455 cfg->flags |= BRIDGE_OPT_HELLO_TIME;
458 if ((cur = tb[BRIDGE_ATTR_MAX_AGE])) {
459 cfg->max_age = blobmsg_get_u32(cur);
460 cfg->flags |= BRIDGE_OPT_MAX_AGE;
465 bridge_reload(struct device *dev, struct blob_attr *attr)
467 struct blob_attr *tb_dev[__DEV_ATTR_MAX];
468 struct blob_attr *tb_br[__BRIDGE_ATTR_MAX];
469 enum dev_change_type ret = DEV_CONFIG_APPLIED;
471 struct bridge_state *bst;
473 BUILD_BUG_ON(sizeof(diff) < __BRIDGE_ATTR_MAX / 8);
474 BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
476 bst = container_of(dev, struct bridge_state, dev);
478 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev,
479 blob_data(attr), blob_len(attr));
480 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, tb_br,
481 blob_data(attr), blob_len(attr));
483 bst->ifnames = tb_br[BRIDGE_ATTR_IFNAME];
484 device_init_settings(dev, tb_dev);
485 bridge_apply_settings(bst, tb_br);
487 if (bst->config_data) {
488 struct blob_attr *otb_dev[__DEV_ATTR_MAX];
489 struct blob_attr *otb_br[__BRIDGE_ATTR_MAX];
491 blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb_dev,
492 blob_data(bst->config_data), blob_len(bst->config_data));
495 config_diff(tb_dev, otb_dev, &device_attr_list, &diff);
496 if (diff & ~(1 << DEV_ATTR_IFNAME))
497 ret = DEV_CONFIG_RESTART;
499 blobmsg_parse(bridge_attrs, __BRIDGE_ATTR_MAX, otb_br,
500 blob_data(bst->config_data), blob_len(bst->config_data));
503 config_diff(tb_br, otb_br, &bridge_attr_list, &diff);
504 if (diff & ~(1 << BRIDGE_ATTR_IFNAME))
505 ret = DEV_CONFIG_RESTART;
507 bridge_config_init(dev);
510 bst->config_data = attr;
514 static struct device *
515 bridge_create(const char *name, struct blob_attr *attr)
517 struct bridge_state *bst;
518 struct device *dev = NULL;
520 bst = calloc(1, sizeof(*bst));
525 device_init(dev, &bridge_device_type, name);
526 dev->config_pending = true;
528 bst->set_state = dev->set_state;
529 dev->set_state = bridge_set_state;
531 dev->hotplug_ops = &bridge_ops;
533 vlist_init(&bst->members, avl_strcmp, bridge_member_update);
534 bst->members.keep_old = true;
535 bridge_reload(dev, attr);