--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "networkd.h"
+#include "net-util.h"
+#include "path-util.h"
+#include "conf-files.h"
+#include "conf-parser.h"
+#include "list.h"
+
+void bridge_free(Bridge *bridge) {
+ bridge_join_callback *callback;
+
+ if (!bridge)
+ return;
+
+ while ((callback = bridge->callbacks)) {
+ LIST_REMOVE(callbacks, bridge->callbacks, callback);
+ free(callback);
+ }
+
+ if (bridge->name)
+ hashmap_remove(bridge->manager->bridges, bridge->name);
+
+ free(bridge->filename);
+
+ free(bridge->description);
+ free(bridge->name);
+
+ free(bridge);
+}
+
+int bridge_get(Manager *manager, const char *name, Bridge **ret) {
+ Bridge *bridge;
+
+ assert(manager);
+ assert(name);
+ assert(ret);
+
+ if (manager_should_reload(manager))
+ manager_load_config(manager);
+
+ bridge = hashmap_get(manager->bridges, name);
+ if (!bridge) {
+ *ret = NULL;
+ return -ENOENT;
+ }
+
+ *ret = bridge;
+
+ return 0;
+}
+
+static int bridge_enter_failed(Bridge *bridge) {
+ bridge->state = BRIDGE_STATE_FAILED;
+
+ return 0;
+}
+
+static int bridge_join_ready(Bridge *bridge, Link* link, sd_rtnl_message_handler_t callback) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ assert(bridge);
+ assert(bridge->state == BRIDGE_STATE_READY);
+ assert(link);
+ assert(callback);
+
+ r = sd_rtnl_message_link_new(RTM_SETLINK, link->ifindex, 0, 0, &req);
+ if (r < 0) {
+ log_error("Could not allocate RTM_SETLINK message: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append(req, IFLA_MASTER, &bridge->link->ifindex);
+ if (r < 0) {
+ log_error("Could not append IFLA_MASTER attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_call_async(bridge->manager->rtnl, req, callback, link, 0, NULL);
+ if (r < 0) {
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
+
+ return 0;
+}
+
+static int bridge_enter_ready(Bridge *bridge) {
+ bridge_join_callback *callback;
+
+ bridge->state = BRIDGE_STATE_READY;
+
+ log_info("Bridge '%s' ready", bridge->name);
+
+ LIST_FOREACH(callbacks, callback, bridge->callbacks) {
+ /* join the links that were attempted to be joined befor the
+ * link was ready */
+ bridge_join_ready(bridge, callback->link, callback->callback);
+ }
+
+ return 0;
+}
+
+static int bridge_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Bridge *bridge = userdata;
+ int r;
+
+ assert(bridge->state == BRIDGE_STATE_CREATING);
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0) {
+ log_warning("Bridge '%s' failed: %s", bridge->name, strerror(-r));
+ return bridge_enter_failed(bridge);
+ }
+
+ if (bridge->link)
+ return bridge_enter_ready(bridge);
+
+ bridge->state = BRIDGE_STATE_CREATED;
+
+ return 0;
+}
+
+static int bridge_create(Bridge *bridge) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+ int r;
+
+ assert(bridge);
+ assert(bridge->state == _BRIDGE_STATE_INVALID);
+ assert(bridge->name);
+ assert(bridge->manager);
+ assert(bridge->manager->rtnl);
+
+ r = sd_rtnl_message_link_new(RTM_NEWLINK, 0, 0, 0, &req);
+ if (r < 0) {
+ log_error("Could not allocate RTM_NEWLINK message: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append(req, IFLA_IFNAME, bridge->name);
+ if (r < 0) {
+ log_error("Could not append IFLA_IFNAME attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_open_container(req, IFLA_LINKINFO);
+ if (r < 0) {
+ log_error("Colud not open IFLA_LINKINFO container: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append(req, IFLA_INFO_KIND, "bridge");
+ if (r < 0) {
+ log_error("Could not append IFLA_INFO_KIND attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_close_container(req);
+ if (r < 0) {
+ log_error("Could not close IFLA_LINKINFO container %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_call_async(bridge->manager->rtnl, req, &bridge_create_handler, bridge, 0, NULL);
+ if (r < 0) {
+ log_error("Could not send rtnetlink message: %s", strerror(-r));
+ return r;
+ }
+
+ log_info("Creating bridge '%s'", bridge->name);
+
+ bridge->state = BRIDGE_STATE_CREATING;
+
+ return 0;
+}
+
+int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t callback) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
+
+ if (bridge->state == BRIDGE_STATE_READY) {
+ bridge_join_ready(bridge, link, callback);
+ } else {
+ /* the bridge is not yet read, save this request for when it is*/
+ bridge_join_callback *cb;
+
+ cb = new0(bridge_join_callback, 1);
+ if (!cb)
+ return log_oom();
+
+ cb->callback = callback;
+ cb->link = link;
+
+ LIST_PREPEND(callbacks, bridge->callbacks, cb);
+ }
+
+ return 0;
+}
+
+int bridge_set_link(Manager *m, Link *link) {
+ Bridge *bridge;
+
+ bridge = hashmap_get(m->bridges, link->ifname);
+ if (!bridge)
+ return -ENOENT;
+
+ if (bridge->link && bridge->link != link)
+ return -EEXIST;
+
+ bridge->link = link;
+
+ if (bridge->state == BRIDGE_STATE_CREATED)
+ bridge_enter_ready(bridge);
+
+ return 0;
+}
+
+static int bridge_load_one(Manager *manager, const char *filename) {
+ _cleanup_bridge_free_ Bridge *bridge = NULL;
+ _cleanup_fclose_ FILE *file = NULL;
+ int r;
+
+ file = fopen(filename, "re");
+ if (!file) {
+ if (errno == ENOENT)
+ return 0;
+ else
+ return errno;
+ }
+
+ bridge = new0(Bridge, 1);
+ if (!bridge)
+ return log_oom();
+
+ bridge->manager = manager;
+ bridge->state = _BRIDGE_STATE_INVALID;
+
+ r = config_parse(NULL, filename, file, "Bridge\0", config_item_perf_lookup,
+ (void*) network_gperf_lookup, false, false, bridge);
+ if (r < 0) {
+ log_warning("Could not parse config file %s: %s", filename, strerror(-r));
+ return r;
+ } else
+ log_debug("Parsed configuration file %s", filename);
+
+ if (!bridge->name) {
+ log_warning("Bridge without Name configured in %s. Ignoring", filename);
+ return 0;
+ }
+
+ bridge->filename = strdup(filename);
+ if (!bridge->filename)
+ return log_oom();
+
+ r = hashmap_put(bridge->manager->bridges, bridge->name, bridge);
+ if (r < 0)
+ return r;
+
+ LIST_HEAD_INIT(bridge->callbacks);
+
+ r = bridge_create(bridge);
+ if (r < 0)
+ return r;
+
+ bridge = NULL;
+
+ return 0;
+}
+
+int bridge_load(Manager *manager) {
+ Bridge *bridge;
+ char **files, **f;
+ int r;
+
+ assert(manager);
+
+ while ((bridge = hashmap_first(manager->bridges)))
+ bridge_free(bridge);
+
+ r = conf_files_list_strv(&files, ".netdev", NULL, (const char **)manager->network_dirs);
+ if (r < 0) {
+ log_error("Failed to enumerate netdev files: %s", strerror(-r));
+ return r;
+ }
+
+ STRV_FOREACH_BACKWARDS(f, files) {
+ r = bridge_load_one(manager, *f);
+ if (r < 0)
+ return r;
+ }
+
+ strv_free(files);
+
+ return 0;
+}
~ianmdlvl / elogind.git / blobdiff