/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Tom Gundersen 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 . ***/ #include #include #include #include "sd-event.h" #include "event-util.h" #include "sd-rtnl.h" #include "rtnl-util.h" #include "sd-daemon.h" #include "sd-network.h" #include "network-util.h" #include "network-internal.h" #include "networkd-wait-online.h" #include "conf-parser.h" #include "strv.h" #include "util.h" #include "build.h" static bool arg_quiet = false; static char **arg_interfaces = NULL; static int help(void) { printf("%s [OPTIONS...]\n\n" "Block until network is configured.\n\n" " -h --help Show this help\n" " --version Print version string\n" " -q --quiet Do not show status information\n" " -i --interface=INTERFACE Block until at least these interfaces have appeared\n", program_invocation_short_name); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "quiet", no_argument, NULL, 'q' }, { "interface", required_argument, NULL, 'i' }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "+hq", options, NULL)) >= 0) { switch (c) { case 'h': return help(); case 'q': arg_quiet = true; break; case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case 'i': if (strv_extend(&arg_interfaces, optarg) < 0) return log_oom(); break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } } return 1; } static bool all_configured(Manager *m) { _cleanup_free_ unsigned *indices = NULL; char **ifname; bool one_ready = false; int r, n, i; n = sd_network_get_ifindices(&indices); if (n <= 0) return false; /* wait for networkd to be aware of all the links given on the commandline */ STRV_FOREACH(ifname, arg_interfaces) { _cleanup_rtnl_message_unref_ sd_rtnl_message *message = NULL, *reply = NULL; bool found = false; int index; r = sd_rtnl_message_new_link(m->rtnl, &message, RTM_GETLINK, 0); if (r < 0) { log_warning("colud not create GETLINK message: %s", strerror(-r)); return false; } r = sd_rtnl_message_append_string(message, IFLA_IFNAME, *ifname); if (r < 0) { log_warning("could not attach ifname to GETLINK message: %s", strerror(-r)); return false; } r = sd_rtnl_call(m->rtnl, message, 0, &reply); if (r < 0) { if (r != -ENODEV) log_warning("could not get link info for %s: %s", *ifname, strerror(-r)); /* link does not yet exist */ return false; } r = sd_rtnl_message_link_get_ifindex(reply, &index); if (r < 0) { log_warning("could not get ifindex: %s", strerror(-r)); return false; } if (index <= 0) { log_warning("invalid ifindex %d for %s", index, *ifname); return false; } for (i = 0; i < n; i++) { if (indices[i] == (unsigned) index) { found = true; break; } } if (!found) { /* link exists, but networkd is not yet aware of it */ return false; } } /* wait for all links networkd manages to be in admin state 'configured' and at least one link to gain a carrier */ for (i = 0; i < n; i++) { _cleanup_free_ char *state = NULL, *oper_state = NULL; if (sd_network_link_is_loopback(indices[i])) /* ignore loopback devices */ continue; r = sd_network_get_link_state(indices[i], &state); if (r == -EBUSY || (r >= 0 && !streq(state, "configured"))) /* not yet processed by udev, or managed by networkd, but not yet configured */ return false; r = sd_network_get_link_operational_state(indices[i], &oper_state); if (r >= 0 && streq(oper_state, "carrier")) /* we wait for at least one link to be ready, regardless of who manages it */ one_ready = true; } return one_ready; } static int monitor_event_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) { Manager *m = userdata; assert(m); assert(m->event); if (all_configured(m)) sd_event_exit(m->event, 0); sd_network_monitor_flush(m->monitor); return 1; } void manager_free(Manager *m) { if (!m) return; sd_event_unref(m->event); sd_rtnl_unref(m->rtnl); free(m); } int main(int argc, char *argv[]) { _cleanup_manager_free_ Manager *m = NULL; _cleanup_event_source_unref_ sd_event_source *event_source = NULL; int r, fd, events; umask(0022); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) return r; if (arg_quiet) log_set_max_level(LOG_WARNING); m = new0(Manager, 1); if (!m) return log_oom(); r = sd_event_new(&m->event); if (r < 0) { log_error("Could not create event: %s", strerror(-r)); goto out; } r = sd_rtnl_open(&m->rtnl, 0); if (r < 0) { log_error("Could not create rtnl: %s", strerror(-r)); goto out; } r = sd_network_monitor_new(NULL, &m->monitor); if (r < 0) { log_error("Could not create monitor: %s", strerror(-r)); goto out; } fd = sd_network_monitor_get_fd(m->monitor); if (fd < 0) { log_error("Could not get monitor fd: %s", strerror(-r)); goto out; } events = sd_network_monitor_get_events(m->monitor); if (events < 0) { log_error("Could not get monitor events: %s", strerror(-r)); goto out; } r = sd_event_add_io(m->event, &event_source, fd, events, &monitor_event_handler, m); if (r < 0) { log_error("Could not add io event source: %s", strerror(-r)); goto out; } if (all_configured(m)) { r = 0; goto out; } sd_notify(false, "READY=1\n" "STATUS=Waiting for network connections..."); r = sd_event_loop(m->event); if (r < 0) { log_error("Event loop failed: %s", strerror(-r)); goto out; } out: sd_notify(false, "STATUS=All interfaces configured..."); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }