301 lines
9.0 KiB
C
301 lines
9.0 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <netinet/ether.h>
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#include <linux/if.h>
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#include <getopt.h>
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#include "sd-event.h"
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#include "event-util.h"
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#include "sd-rtnl.h"
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#include "rtnl-util.h"
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#include "sd-daemon.h"
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#include "sd-network.h"
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#include "network-util.h"
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#include "network-internal.h"
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#include "networkd-wait-online.h"
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#include "conf-parser.h"
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#include "strv.h"
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#include "util.h"
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#include "build.h"
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static bool arg_quiet = false;
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static char **arg_interfaces = NULL;
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static int help(void) {
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printf("%s [OPTIONS...]\n\n"
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"Block until network is configured.\n\n"
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" -h --help Show this help\n"
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" --version Print version string\n"
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" -q --quiet Do not show status information\n"
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" -i --interface=INTERFACE Block until at least these interfaces have appeared\n",
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program_invocation_short_name);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "quiet", no_argument, NULL, 'q' },
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{ "interface", required_argument, NULL, 'i' },
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{}
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "+hq", options, NULL)) >= 0) {
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switch (c) {
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case 'h':
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return help();
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case 'q':
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arg_quiet = true;
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break;
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(SYSTEMD_FEATURES);
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return 0;
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case 'i':
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if (strv_extend(&arg_interfaces, optarg) < 0)
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return log_oom();
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break;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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}
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return 1;
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}
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static bool all_configured(Manager *m) {
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_cleanup_free_ unsigned *indices = NULL;
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char **ifname;
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bool one_ready = false;
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int r, n, i;
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n = sd_network_get_ifindices(&indices);
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if (n <= 0)
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return false;
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/* wait for networkd to be aware of all the links given on the commandline */
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STRV_FOREACH(ifname, arg_interfaces) {
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_cleanup_rtnl_message_unref_ sd_rtnl_message *message = NULL, *reply = NULL;
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bool found = false;
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int index;
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r = sd_rtnl_message_new_link(m->rtnl, &message, RTM_GETLINK, 0);
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if (r < 0) {
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log_warning("colud not create GETLINK message: %s", strerror(-r));
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return false;
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}
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r = sd_rtnl_message_append_string(message, IFLA_IFNAME, *ifname);
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if (r < 0) {
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log_warning("could not attach ifname to GETLINK message: %s", strerror(-r));
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return false;
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}
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r = sd_rtnl_call(m->rtnl, message, 0, &reply);
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if (r < 0) {
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if (r != -ENODEV)
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log_warning("could not get link info for %s: %s", *ifname,
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strerror(-r));
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/* link does not yet exist */
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return false;
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}
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r = sd_rtnl_message_link_get_ifindex(reply, &index);
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if (r < 0) {
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log_warning("could not get ifindex: %s", strerror(-r));
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return false;
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}
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if (index <= 0) {
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log_warning("invalid ifindex %d for %s", index, *ifname);
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return false;
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}
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for (i = 0; i < n; i++) {
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if (indices[i] == (unsigned) index) {
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found = true;
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break;
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}
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}
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if (!found) {
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/* link exists, but networkd is not yet aware of it */
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return false;
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}
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}
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/* wait for all links networkd manages to be in admin state 'configured'
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and at least one link to gain a carrier */
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for (i = 0; i < n; i++) {
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_cleanup_free_ char *state = NULL, *oper_state = NULL;
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if (sd_network_link_is_loopback(indices[i]))
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/* ignore loopback devices */
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continue;
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r = sd_network_get_link_state(indices[i], &state);
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if (r == -EBUSY || (r >= 0 && !streq(state, "configured")))
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/* not yet processed by udev, or managed by networkd, but not yet configured */
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return false;
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r = sd_network_get_link_operational_state(indices[i], &oper_state);
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if (r >= 0 &&
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(streq(oper_state, "degraded") ||
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streq(oper_state, "routable")))
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/* we wait for at least one link to be ready,
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regardless of who manages it */
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one_ready = true;
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}
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return one_ready;
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}
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static int monitor_event_handler(sd_event_source *s, int fd, uint32_t revents,
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void *userdata) {
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Manager *m = userdata;
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assert(m);
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assert(m->event);
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if (all_configured(m))
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sd_event_exit(m->event, 0);
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sd_network_monitor_flush(m->monitor);
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return 1;
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}
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void manager_free(Manager *m) {
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if (!m)
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return;
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sd_event_unref(m->event);
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sd_rtnl_unref(m->rtnl);
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free(m);
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}
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int main(int argc, char *argv[]) {
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_cleanup_manager_free_ Manager *m = NULL;
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_cleanup_event_source_unref_ sd_event_source *event_source = NULL;
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int r, fd, events;
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umask(0022);
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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return r;
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if (arg_quiet)
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log_set_max_level(LOG_WARNING);
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m = new0(Manager, 1);
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if (!m)
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return log_oom();
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r = sd_event_new(&m->event);
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if (r < 0) {
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log_error("Could not create event: %s", strerror(-r));
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goto out;
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}
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r = sd_rtnl_open(&m->rtnl, 0);
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if (r < 0) {
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log_error("Could not create rtnl: %s", strerror(-r));
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goto out;
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}
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r = sd_network_monitor_new(NULL, &m->monitor);
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if (r < 0) {
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log_error("Could not create monitor: %s", strerror(-r));
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goto out;
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}
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fd = sd_network_monitor_get_fd(m->monitor);
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if (fd < 0) {
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log_error("Could not get monitor fd: %s", strerror(-r));
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goto out;
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}
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events = sd_network_monitor_get_events(m->monitor);
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if (events < 0) {
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log_error("Could not get monitor events: %s", strerror(-r));
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goto out;
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}
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r = sd_event_add_io(m->event, &event_source, fd, events, &monitor_event_handler,
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m);
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if (r < 0) {
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log_error("Could not add io event source: %s", strerror(-r));
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goto out;
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}
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if (all_configured(m)) {
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r = 0;
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goto out;
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}
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sd_notify(false,
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"READY=1\n"
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"STATUS=Waiting for network connections...");
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r = sd_event_loop(m->event);
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if (r < 0) {
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log_error("Event loop failed: %s", strerror(-r));
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goto out;
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}
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out:
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sd_notify(false,
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"STATUS=All interfaces configured...");
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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