X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fnetifd.git;a=blobdiff_plain;f=bridge.c;h=4291e7c1af9d00a1b6562fee2ff4e4264de30e97;hp=46967c885e071cfb7c469dc6919f30caf3ae27ea;hb=fb2f843edf44c6f12b636cd82cdd1c71e953495f;hpb=e472b121daaef2efc3301445207e4c9ad69b06ae diff --git a/bridge.c b/bridge.c index 46967c8..4291e7c 100644 --- a/bridge.c +++ b/bridge.c @@ -1,3 +1,16 @@ +/* + * netifd - network interface daemon + * Copyright (C) 2012 Felix Fietkau + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ #include #include #include @@ -13,10 +26,12 @@ enum { BRIDGE_ATTR_IFNAME, BRIDGE_ATTR_STP, BRIDGE_ATTR_FORWARD_DELAY, + BRIDGE_ATTR_PRIORITY, BRIDGE_ATTR_IGMP_SNOOP, BRIDGE_ATTR_AGEING_TIME, BRIDGE_ATTR_HELLO_TIME, BRIDGE_ATTR_MAX_AGE, + BRIDGE_ATTR_BRIDGE_EMPTY, __BRIDGE_ATTR_MAX }; @@ -24,17 +39,19 @@ static const struct blobmsg_policy bridge_attrs[__BRIDGE_ATTR_MAX] = { [BRIDGE_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_ARRAY }, [BRIDGE_ATTR_STP] = { "stp", BLOBMSG_TYPE_BOOL }, [BRIDGE_ATTR_FORWARD_DELAY] = { "forward_delay", BLOBMSG_TYPE_INT32 }, + [BRIDGE_ATTR_PRIORITY] = { "priority", BLOBMSG_TYPE_INT32 }, [BRIDGE_ATTR_AGEING_TIME] = { "ageing_time", BLOBMSG_TYPE_INT32 }, [BRIDGE_ATTR_HELLO_TIME] = { "hello_time", BLOBMSG_TYPE_INT32 }, [BRIDGE_ATTR_MAX_AGE] = { "max_age", BLOBMSG_TYPE_INT32 }, [BRIDGE_ATTR_IGMP_SNOOP] = { "igmp_snooping", BLOBMSG_TYPE_BOOL }, + [BRIDGE_ATTR_BRIDGE_EMPTY] = { "bridge_empty", BLOBMSG_TYPE_BOOL }, }; -static const union config_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = { +static const struct uci_blob_param_info bridge_attr_info[__BRIDGE_ATTR_MAX] = { [BRIDGE_ATTR_IFNAME] = { .type = BLOBMSG_TYPE_STRING }, }; -static const struct config_param_list bridge_attr_list = { +static const struct uci_blob_param_list bridge_attr_list = { .n_params = __BRIDGE_ATTR_MAX, .params = bridge_attrs, .info = bridge_attr_info, @@ -71,8 +88,11 @@ struct bridge_state { bool active; bool force_active; + struct uloop_timeout retry; + struct bridge_member *primary_port; struct vlist_tree members; int n_present; + int n_failed; }; struct bridge_member { @@ -83,6 +103,34 @@ struct bridge_member { char name[]; }; +static void +bridge_reset_primary(struct bridge_state *bst) +{ + struct bridge_member *bm; + + if (!bst->primary_port && + (bst->dev.settings.flags & DEV_OPT_MACADDR)) + return; + + bst->primary_port = NULL; + bst->dev.settings.flags &= ~DEV_OPT_MACADDR; + vlist_for_each_element(&bst->members, bm, node) { + uint8_t *macaddr; + + if (!bm->present) + continue; + + bst->primary_port = bm; + if (bm->dev.dev->settings.flags & DEV_OPT_MACADDR) + macaddr = bm->dev.dev->settings.macaddr; + else + macaddr = bm->dev.dev->orig_settings.macaddr; + memcpy(bst->dev.settings.macaddr, macaddr, 6); + bst->dev.settings.flags |= DEV_OPT_MACADDR; + return; + } +} + static int bridge_disable_member(struct bridge_member *bm) { @@ -94,6 +142,8 @@ bridge_disable_member(struct bridge_member *bm) system_bridge_delif(&bst->dev, bm->dev.dev); device_release(&bm->dev); + device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE); + return 0; } @@ -106,6 +156,12 @@ bridge_enable_member(struct bridge_member *bm) if (!bm->present) return 0; + /* Disable IPv6 for bridge members */ + if (!(bm->dev.dev->settings.flags & DEV_OPT_IPV6)) { + bm->dev.dev->settings.ipv6 = 0; + bm->dev.dev->settings.flags |= DEV_OPT_IPV6; + } + ret = device_claim(&bm->dev); if (ret < 0) goto error; @@ -116,11 +172,16 @@ bridge_enable_member(struct bridge_member *bm) goto error; } + device_broadcast_event(&bst->dev, DEV_EVENT_TOPO_CHANGE); + return 0; error: + bst->n_failed++; bm->present = false; bst->n_present--; + device_release(&bm->dev); + return ret; } @@ -132,18 +193,56 @@ bridge_remove_member(struct bridge_member *bm) if (!bm->present) return; + if (bm == bst->primary_port) + bridge_reset_primary(bst); + if (bst->dev.active) bridge_disable_member(bm); bm->present = false; bm->bst->n_present--; + if (bst->config.bridge_empty) + return; + bst->force_active = false; if (bst->n_present == 0) device_set_present(&bst->dev, false); } static void +bridge_free_member(struct bridge_member *bm) +{ + struct device *dev = bm->dev.dev; + + bridge_remove_member(bm); + device_remove_user(&bm->dev); + + /* + * When reloading the config and moving a device from one bridge to + * another, the other bridge may have tried to claim this device + * before it was removed here. + * Ensure that claiming the device is retried by toggling its present + * state + */ + if (dev->present) { + device_set_present(dev, false); + device_set_present(dev, true); + } + + free(bm); +} + +static void +bridge_check_retry(struct bridge_state *bst) +{ + if (!bst->n_failed) + return; + + uloop_timeout_set(&bst->retry, 100); +} + +static void bridge_member_cb(struct device_user *dev, enum device_event ev) { struct bridge_member *bm = container_of(dev, struct bridge_member, dev); @@ -156,10 +255,17 @@ bridge_member_cb(struct device_user *dev, enum device_event ev) bm->present = true; bst->n_present++; - if (bst->dev.active) - bridge_enable_member(bm); - else if (bst->n_present == 1) + if (bst->n_present == 1) device_set_present(&bst->dev, true); + if (bst->dev.active && !bridge_enable_member(bm)) { + /* + * Adding a bridge member can overwrite the bridge mtu + * in the kernel, apply the bridge settings in case the + * bridge mtu is set + */ + system_if_apply_settings(&bst->dev, &bst->dev.settings, + DEV_OPT_MTU); + } break; case DEV_EVENT_REMOVE: @@ -205,8 +311,10 @@ bridge_set_up(struct bridge_state *bst) if (ret < 0) goto out; + bst->n_failed = 0; vlist_for_each_element(&bst->members, bm, node) bridge_enable_member(bm); + bridge_check_retry(bst); if (!bst->force_active && !bst->n_present) { /* initialization of all member interfaces failed */ @@ -215,6 +323,7 @@ bridge_set_up(struct bridge_state *bst) return -ENOENT; } + bridge_reset_primary(bst); ret = bst->set_state(&bst->dev, true); if (ret < 0) bridge_set_down(bst); @@ -242,13 +351,20 @@ bridge_create_member(struct bridge_state *bst, struct device *dev, bool hotplug) struct bridge_member *bm; bm = calloc(1, sizeof(*bm) + strlen(dev->ifname) + 1); + if (!bm) + return NULL; + bm->bst = bst; bm->dev.cb = bridge_member_cb; bm->dev.hotplug = hotplug; strcpy(bm->name, dev->ifname); bm->dev.dev = dev; vlist_add(&bst->members, &bm->node, bm->name); - if (hotplug) + // Need to look up the bridge member again as the above + // created pointer will be freed in case the bridge member + // already existed + bm = vlist_find(&bst->members, dev->ifname, bm, node); + if (hotplug && bm) bm->node.version = -1; return bm; @@ -277,9 +393,7 @@ bridge_member_update(struct vlist_tree *tree, struct vlist_node *node_new, if (node_old) { bm = container_of(node_old, struct bridge_member, node); - bridge_remove_member(bm); - device_remove_user(&bm->dev); - free(bm); + bridge_free_member(bm); } } @@ -343,7 +457,6 @@ bridge_free(struct device *dev) { struct bridge_state *bst; - device_cleanup(dev); bst = container_of(dev, struct bridge_state, dev); vlist_flush_all(&bst->members); free(bst); @@ -376,14 +489,20 @@ bridge_config_init(struct device *dev) bst = container_of(dev, struct bridge_state, dev); - if (!bst->ifnames) - return; + if (bst->config.bridge_empty) { + bst->force_active = true; + device_set_present(&bst->dev, true); + } + bst->n_failed = 0; vlist_update(&bst->members); - blobmsg_for_each_attr(cur, bst->ifnames, rem) { - bridge_add_member(bst, blobmsg_data(cur)); + if (bst->ifnames) { + blobmsg_for_each_attr(cur, bst->ifnames, rem) { + bridge_add_member(bst, blobmsg_data(cur)); + } } vlist_flush(&bst->members); + bridge_check_retry(bst); } static void @@ -393,9 +512,11 @@ bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb) struct blob_attr *cur; /* defaults */ - cfg->stp = true; + cfg->stp = false; cfg->forward_delay = 2; cfg->igmp_snoop = true; + cfg->bridge_empty = false; + cfg->priority = 0x7FFF; if ((cur = tb[BRIDGE_ATTR_STP])) cfg->stp = blobmsg_get_bool(cur); @@ -403,6 +524,9 @@ bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb) if ((cur = tb[BRIDGE_ATTR_FORWARD_DELAY])) cfg->forward_delay = blobmsg_get_u32(cur); + if ((cur = tb[BRIDGE_ATTR_PRIORITY])) + cfg->priority = blobmsg_get_u32(cur); + if ((cur = tb[BRIDGE_ATTR_IGMP_SNOOP])) cfg->igmp_snoop = blobmsg_get_bool(cur); @@ -420,6 +544,9 @@ bridge_apply_settings(struct bridge_state *bst, struct blob_attr **tb) cfg->max_age = blobmsg_get_u32(cur); cfg->flags |= BRIDGE_OPT_MAX_AGE; } + + if ((cur = tb[BRIDGE_ATTR_BRIDGE_EMPTY])) + cfg->bridge_empty = blobmsg_get_bool(cur); } enum dev_change_type @@ -453,7 +580,7 @@ bridge_reload(struct device *dev, struct blob_attr *attr) blob_data(bst->config_data), blob_len(bst->config_data)); diff = 0; - config_diff(tb_dev, otb_dev, &device_attr_list, &diff); + uci_blob_diff(tb_dev, otb_dev, &device_attr_list, &diff); if (diff & ~(1 << DEV_ATTR_IFNAME)) ret = DEV_CONFIG_RESTART; @@ -461,7 +588,7 @@ bridge_reload(struct device *dev, struct blob_attr *attr) blob_data(bst->config_data), blob_len(bst->config_data)); diff = 0; - config_diff(tb_br, otb_br, &bridge_attr_list, &diff); + uci_blob_diff(tb_br, otb_br, &bridge_attr_list, &diff); if (diff & ~(1 << BRIDGE_ATTR_IFNAME)) ret = DEV_CONFIG_RESTART; @@ -472,6 +599,25 @@ bridge_reload(struct device *dev, struct blob_attr *attr) return ret; } +static void +bridge_retry_members(struct uloop_timeout *timeout) +{ + struct bridge_state *bst = container_of(timeout, struct bridge_state, retry); + struct bridge_member *bm; + + bst->n_failed = 0; + vlist_for_each_element(&bst->members, bm, node) { + if (bm->present) + continue; + + if (!bm->dev.dev->present) + continue; + + bm->present = true; + bridge_enable_member(bm); + } +} + static struct device * bridge_create(const char *name, struct blob_attr *attr) { @@ -485,6 +631,7 @@ bridge_create(const char *name, struct blob_attr *attr) dev = &bst->dev; device_init(dev, &bridge_device_type, name); dev->config_pending = true; + bst->retry.cb = bridge_retry_members; bst->set_state = dev->set_state; dev->set_state = bridge_set_state; @@ -497,5 +644,3 @@ bridge_create(const char *name, struct blob_attr *attr) return dev; } - -