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 <netinet/ether.h>
25 #include "rtnl-util.h"
27 #include "network-util.h"
28 #include "network-internal.h"
29 #include "networkd-wait-online-link.h"
30 #include "networkd-wait-online.h"
34 bool manager_ignore_link(Manager *m, Link *link) {
38 if (link->flags & IFF_LOOPBACK)
41 if (strv_contains(m->ignore, link->ifname))
47 bool manager_all_configured(Manager *m) {
51 bool one_ready = false;
53 /* wait for all the links given on the command line to appear */
54 STRV_FOREACH(ifname, m->interfaces) {
55 l = hashmap_get(m->links_by_name, *ifname);
57 log_debug("still waiting for %s", *ifname);
62 /* wait for all links networkd manages to be in admin state 'configured'
63 and at least one link to gain a carrier */
64 HASHMAP_FOREACH(l, m->links, i) {
65 if (manager_ignore_link(m, l)) {
66 log_info("ignoring: %s", l->ifname);
71 log_debug("link %s has not yet been processed by udev",
76 if (streq(l->state, "configuring")) {
77 log_debug("link %s is being processed by networkd",
82 if (l->operational_state &&
83 STR_IN_SET(l->operational_state, "degraded", "routable"))
84 /* we wait for at least one link to be ready,
85 regardless of who manages it */
92 static int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
93 Manager *m = userdata;
103 r = sd_rtnl_message_get_type(mm, &type);
107 r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);
111 r = sd_rtnl_message_read_string(mm, IFLA_IFNAME, &ifname);
115 l = hashmap_get(m->links, INT_TO_PTR(ifindex));
121 log_debug("Found link %i", ifindex);
123 r = link_new(m, &l, ifindex, ifname);
127 r = link_update_monitor(l);
132 r = link_update_rtnl(l, mm);
140 log_debug("Removing link %i", l->ifindex);
150 log_warning_errno(r, "Failed to process RTNL link message: %m");
154 static int on_rtnl_event(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
155 Manager *m = userdata;
158 r = manager_process_link(rtnl, mm, m);
162 if (manager_all_configured(m))
163 sd_event_exit(m->event, 0);
168 static int manager_rtnl_listen(Manager *m) {
169 _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
175 /* First, subscribe to interfaces coming and going */
176 r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);
180 r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
184 r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, on_rtnl_event, m);
188 r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, on_rtnl_event, m);
192 /* Then, enumerate all links */
193 r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
197 r = sd_rtnl_message_request_dump(req, true);
201 r = sd_rtnl_call(m->rtnl, req, 0, &reply);
205 for (i = reply; i; i = sd_rtnl_message_next(i)) {
206 r = manager_process_link(m->rtnl, i, m);
214 static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
215 Manager *m = userdata;
222 sd_network_monitor_flush(m->network_monitor);
224 HASHMAP_FOREACH(l, m->links, i) {
225 r = link_update_monitor(l);
227 log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex);
230 if (manager_all_configured(m))
231 sd_event_exit(m->event, 0);
236 static int manager_network_monitor_listen(Manager *m) {
241 r = sd_network_monitor_new(&m->network_monitor, NULL);
245 fd = sd_network_monitor_get_fd(m->network_monitor);
249 events = sd_network_monitor_get_events(m->network_monitor);
253 r = sd_event_add_io(m->event, &m->network_monitor_event_source,
254 fd, events, &on_network_event, m);
261 int manager_new(Manager **ret, char **interfaces, char **ignore) {
262 _cleanup_(manager_freep) Manager *m = NULL;
267 m = new0(Manager, 1);
271 m->interfaces = interfaces;
274 r = sd_event_default(&m->event);
278 sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
279 sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
281 sd_event_set_watchdog(m->event, true);
283 r = manager_network_monitor_listen(m);
287 r = manager_rtnl_listen(m);
297 void manager_free(Manager *m) {
303 while ((l = hashmap_first(m->links)))
305 hashmap_free(m->links);
306 hashmap_free(m->links_by_name);
308 sd_event_source_unref(m->network_monitor_event_source);
309 sd_network_monitor_unref(m->network_monitor);
311 sd_event_source_unref(m->rtnl_event_source);
312 sd_rtnl_unref(m->rtnl);
314 sd_event_unref(m->event);