1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Tom Gundersen <teg@jklm.no>
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include "path-util.h"
24 #include "libudev-private.h"
25 #include "udev-util.h"
27 int manager_new(Manager **ret) {
28 _cleanup_manager_free_ Manager *m = NULL;
35 r = sd_event_default(&m->event);
39 sd_event_set_watchdog(m->event, true);
41 r = sd_rtnl_open(RTMGRP_LINK | RTMGRP_IPV4_IFADDR, &m->rtnl);
49 m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
53 m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
57 m->bridges = hashmap_new(string_hash_func, string_compare_func);
61 LIST_HEAD_INIT(m->networks);
63 m->network_dirs = strv_new("/etc/systemd/network/",
64 "/run/systemd/network/",
65 "/usr/lib/systemd/network",
66 #ifdef HAVE_SPLIT_USER
67 "/lib/systemd/network",
73 if (!path_strv_canonicalize_uniq(m->network_dirs))
82 void manager_free(Manager *m) {
87 udev_monitor_unref(m->udev_monitor);
89 sd_event_source_unref(m->udev_event_source);
90 sd_event_unref(m->event);
92 while ((network = m->networks))
93 network_free(network);
95 while ((link = hashmap_first(m->links)))
97 hashmap_free(m->links);
99 while ((bridge = hashmap_first(m->bridges)))
101 hashmap_free(m->bridges);
103 strv_free(m->network_dirs);
104 sd_rtnl_unref(m->rtnl);
109 int manager_load_config(Manager *m) {
112 /* update timestamp */
113 paths_check_timestamp(m->network_dirs, &m->network_dirs_ts_usec, true);
126 bool manager_should_reload(Manager *m) {
127 return paths_check_timestamp(m->network_dirs, &m->network_dirs_ts_usec, false);
130 static int manager_process_link(Manager *m, struct udev_device *device) {
134 if (streq_ptr(udev_device_get_action(device), "remove")) {
137 log_debug("Link removed: %s", udev_device_get_sysname(device));
139 ifindex = udev_device_get_ifindex(device);
140 link = hashmap_get(m->links, &ifindex);
146 log_debug("New link: %s", udev_device_get_sysname(device));
148 r = link_add(m, device);
150 log_error("Could not handle link %s: %s",
151 udev_device_get_sysname(device),
159 int manager_udev_enumerate_links(Manager *m) {
160 struct udev_list_entry *item = NULL, *first = NULL;
161 struct udev_enumerate *e;
166 e = udev_enumerate_new(m->udev);
172 r = udev_enumerate_add_match_subsystem(e, "net");
176 r = udev_enumerate_scan_devices(e);
180 first = udev_enumerate_get_list_entry(e);
181 udev_list_entry_foreach(item, first) {
182 struct udev_device *d;
185 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
191 k = manager_process_link(m, d);
192 udev_device_unref(d);
200 udev_enumerate_unref(e);
205 static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
206 Manager *m = userdata;
207 struct udev_monitor *monitor = m->udev_monitor;
208 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
210 device = udev_monitor_receive_device(monitor);
214 manager_process_link(m, device);
218 int manager_udev_listen(Manager *m) {
221 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
223 log_error("Could not add udev monitor filter: %s", strerror(-r));
227 r = udev_monitor_enable_receiving(m->udev_monitor);
229 log_error("Could not enable udev monitor");
233 r = sd_event_add_io(m->event,
234 udev_monitor_get_fd(m->udev_monitor),
235 EPOLLIN, manager_dispatch_link_udev,
236 m, &m->udev_event_source);
243 static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
244 Manager *m = userdata;
249 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
253 link = hashmap_get(m->links, &ifindex);
257 r = sd_rtnl_message_link_get_flags(message, &flags);
261 r = link_update_flags(link, flags);
268 int manager_rtnl_listen(Manager *m) {
271 r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
275 r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);