int link_new(Manager *manager, struct udev_device *device, Link **ret) {
_cleanup_link_free_ Link *link = NULL;
- uint64_t ifindex;
const char *mac;
+ struct ether_addr *mac_addr;
int r;
assert(device);
if (!link)
return -ENOMEM;
- ifindex = udev_device_get_ifindex(device);
- if (ifindex <= 0)
- return -EINVAL;
+ link->manager = manager;
+ link->state = _LINK_STATE_INVALID;
- mac = udev_device_get_sysattr_value(device, "address");
- if (!mac)
+ link->ifindex = udev_device_get_ifindex(device);
+ if (link->ifindex <= 0)
return -EINVAL;
- memcpy(&link->mac.ether_addr_octet[0], ether_aton(mac), ETH_ALEN);
- link->ifindex = ifindex;
- link->manager = manager;
+ mac = udev_device_get_sysattr_value(device, "address");
+ if (mac) {
+ mac_addr = ether_aton(mac);
+ if (mac_addr)
+ memcpy(&link->mac, mac_addr, sizeof(struct ether_addr));
+ }
- r = hashmap_put(manager->links, &ifindex, link);
+ r = hashmap_put(manager->links, &link->ifindex, link);
if (r < 0)
return r;
if (!link)
return;
- network_free(link->network);
+ assert(link->manager);
- hashmap_remove(link->manager->links, link);
+ hashmap_remove(link->manager->links, &link->ifindex);
free(link);
}
return 0;
}
-int link_up(Manager *manager, Link *link) {
+static int link_enter_configured(Link *link) {
+ log_info("Link configured successfully.");
+
+ link->state = LINK_STATE_CONFIGURED;
+
+ return 0;
+}
+
+static int link_enter_failed(Link *link) {
+ log_warning("Could not configure link.");
+
+ link->state = LINK_STATE_FAILED;
+
+ return 0;
+}
+
+static bool link_is_up(Link *link) {
+ return link->flags & IFF_UP;
+}
+
+static int link_enter_routes_set(Link *link) {
+ log_info("Routes set for link %ju", link->ifindex);
+
+ if (link_is_up(link))
+ return link_enter_configured(link);
+
+ link->state = LINK_STATE_ROUTES_SET;
+
+ return 0;
+}
+
+static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->rtnl_messages > 0);
+ assert(link->state == LINK_STATE_SET_ROUTES || link->state == LINK_STATE_FAILED);
+
+ link->rtnl_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST) {
+ log_warning("Could not set route on interface %ju: %s",
+ link->ifindex, strerror(-r));
+ return link_enter_failed(link);
+ }
+
+ if (link->rtnl_messages == 0)
+ return link_enter_routes_set(link);
+
+ return 1;
+}
+
+static int link_enter_set_routes(Link *link) {
+ Route *route;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->rtnl_messages == 0);
+ assert(link->state == LINK_STATE_ADDRESSES_SET);
+
+ link->state = LINK_STATE_SET_ROUTES;
+
+ if (!link->network->routes)
+ return link_enter_routes_set(link);
+
+ LIST_FOREACH(routes, route, link->network->routes) {
+ r = route_configure(route, link, &route_handler);
+ if (r < 0)
+ link_enter_failed(link);
+ }
+
+ return 0;
+}
+
+static int link_enter_addresses_set(Link *link) {
+ log_info("Addresses set for link %ju", link->ifindex);
+
+ link->state = LINK_STATE_ADDRESSES_SET;
+
+ return link_enter_set_routes(link);
+}
+
+static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link->rtnl_messages > 0);
+ assert(link->state == LINK_STATE_SET_ADDRESSES || link->state == LINK_STATE_FAILED);
+
+ link->rtnl_messages --;
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST) {
+ log_warning("Could not set address on interface %ju: %s",
+ link->ifindex, strerror(-r));
+ link_enter_failed(link);
+ }
+
+ if (link->rtnl_messages == 0)
+ link_enter_addresses_set(link);
+
+ return 1;
+}
+
+static int link_enter_set_addresses(Link *link) {
+ Address *address;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->rtnl_messages == 0);
+
+ if (!link->network->addresses)
+ return link_enter_addresses_set(link);
+
+ link->state = LINK_STATE_SET_ADDRESSES;
+
+ LIST_FOREACH(addresses, address, link->network->addresses) {
+ r = address_configure(address, link, &address_handler);
+ if (r < 0)
+ link_enter_failed(link);
+ }
+
+ return 0;
+}
+
+static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_warning("Could not bring up interface %ju: %s",
+ link->ifindex, strerror(-r));
+ return link_enter_failed(link);
+ }
+
+ link->flags |= IFF_UP;
+
+ log_info("Link is UP.");
+
+ if (link->state == LINK_STATE_ROUTES_SET)
+ return link_enter_configured(link);
+
+ return 1;
+}
+
+static int link_up(Link *link) {
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
+ assert(link);
+ assert(link->manager);
+ assert(link->manager->rtnl);
+
r = sd_rtnl_message_link_new(RTM_NEWLINK, link->ifindex, 0, IFF_UP, &req);
if (r < 0) {
log_error("Could not allocate RTM_NEWLINK message");
return r;
}
- r = sd_rtnl_call(manager->rtnl, req, 0, NULL);
+ r = sd_rtnl_call_async(link->manager->rtnl, req, link_handler, link, 0, NULL);
if (r < 0) {
- log_error("Could not UP link: %s", strerror(-r));
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
return r;
}
- log_info("Link is UP");
+ return 0;
+}
+
+int link_configure(Link *link) {
+ int r;
+
+ r = link_up(link);
+ if (r < 0)
+ return link_enter_failed(link);
+
+ r = link_enter_set_addresses(link);
+ if (r < 0)
+ return link_enter_failed(link);
return 0;
}
~ianmdlvl / elogind.git / blobdiff