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("%s: link removed", udev_device_get_sysname(device));
139 ifindex = udev_device_get_ifindex(device);
140 link = hashmap_get(m->links, &ifindex);
146 log_debug("%s: link added", 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 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
161 struct udev_list_entry *item = NULL, *first = NULL;
166 e = udev_enumerate_new(m->udev);
170 r = udev_enumerate_add_match_subsystem(e, "net");
174 r = udev_enumerate_add_match_is_initialized(e);
178 r = udev_enumerate_scan_devices(e);
182 first = udev_enumerate_get_list_entry(e);
183 udev_list_entry_foreach(item, first) {
184 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
187 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
191 k = manager_process_link(m, d);
199 static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
200 Manager *m = userdata;
201 struct udev_monitor *monitor = m->udev_monitor;
202 _cleanup_udev_device_unref_ struct udev_device *device = NULL;
204 device = udev_monitor_receive_device(monitor);
208 manager_process_link(m, device);
212 int manager_udev_listen(Manager *m) {
215 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
217 log_error("Could not add udev monitor filter: %s", strerror(-r));
221 r = udev_monitor_enable_receiving(m->udev_monitor);
223 log_error("Could not enable udev monitor");
227 r = sd_event_add_io(m->event,
228 udev_monitor_get_fd(m->udev_monitor),
229 EPOLLIN, manager_dispatch_link_udev,
230 m, &m->udev_event_source);
237 static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
238 Manager *m = userdata;
242 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
246 link = hashmap_get(m->links, &ifindex);
250 /* only track the status of links we want to manage */
252 r = link_update(link, message);
260 int manager_rtnl_listen(Manager *m) {
263 r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
267 r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, &manager_rtnl_process_link, m);