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Diffstat (limited to 'src/network/networkd-wait-online-manager.c')
-rw-r--r--src/network/networkd-wait-online-manager.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/src/network/networkd-wait-online-manager.c b/src/network/networkd-wait-online-manager.c
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+++ b/src/network/networkd-wait-online-manager.c
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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Tom Gundersen <teg@jklm.no>
+
+ 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 <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if.h>
+
+#include "rtnl-util.h"
+
+#include "network-util.h"
+#include "network-internal.h"
+#include "networkd-wait-online-link.h"
+#include "networkd-wait-online.h"
+
+#include "util.h"
+
+bool manager_all_configured(Manager *m) {
+ Iterator i;
+ Link *l;
+ char **ifname;
+ bool one_ready = false;
+
+ /* wait for all the links given on the commandline to appear */
+ STRV_FOREACH(ifname, m->interfaces) {
+ l = hashmap_get(m->links_by_name, *ifname);
+ if (!l) {
+ log_debug("still waiting for %s", *ifname);
+ return false;
+ }
+ }
+
+ /* wait for all links networkd manages to be in admin state 'configured'
+ and at least one link to gain a carrier */
+ HASHMAP_FOREACH(l, m->links, i) {
+ if (!link_relevant(l)) {
+ log_info("ignore irrelevant link: %s", l->ifname);
+ continue;
+ }
+
+ if (!l->state) {
+ log_debug("link %s has not yet been processed by udev",
+ l->ifname);
+ return false;
+ }
+
+ if (streq(l->state, "configuring")) {
+ log_debug("link %s is being processed by networkd",
+ l->ifname);
+ return false;
+ }
+
+ if (l->operational_state &&
+ STR_IN_SET(l->operational_state, "degraded", "routable"))
+ /* we wait for at least one link to be ready,
+ regardless of who manages it */
+ one_ready = true;
+ }
+
+ return one_ready;
+}
+
+static int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
+ Manager *m = userdata;
+ uint16_t type;
+ Link *l;
+ char *ifname;
+ int ifindex, r;
+
+ assert(rtnl);
+ assert(m);
+ assert(mm);
+
+ r = sd_rtnl_message_get_type(mm, &type);
+ if (r < 0)
+ goto fail;
+
+ r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);
+ if (r < 0)
+ goto fail;
+
+ r = sd_rtnl_message_read_string(mm, IFLA_IFNAME, &ifname);
+ if (r < 0)
+ goto fail;
+
+ l = hashmap_get(m->links, INT_TO_PTR(ifindex));
+
+ switch (type) {
+
+ case RTM_NEWLINK:
+ if (!l) {
+ log_debug("Found link %i", ifindex);
+
+ r = link_new(m, &l, ifindex, ifname);
+ if (r < 0)
+ goto fail;
+
+ r = link_update_monitor(l);
+ if (r < 0)
+ goto fail;
+ }
+
+ r = link_update_rtnl(l, mm);
+ if (r < 0)
+ goto fail;
+
+ break;
+
+ case RTM_DELLINK:
+ if (l) {
+ log_debug("Removing link %i", l->ifindex);
+ link_free(l);
+ }
+
+ break;
+ }
+
+ return 0;
+
+fail:
+ log_warning("Failed to process RTNL link message: %s", strerror(-r));
+ return 0;
+}
+
+static int on_rtnl_event(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {
+ Manager *m = userdata;
+ int r;
+
+ r = manager_process_link(rtnl, mm, m);
+ if (r < 0)
+ return r;
+
+ if (manager_all_configured(m))
+ sd_event_exit(m->event, 0);
+
+ return 1;
+}
+
+static int manager_rtnl_listen(Manager *m) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
+ sd_rtnl_message *i;
+ int r;
+
+ assert(m);
+
+ /* First, subscibe to interfaces coming and going */
+ r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, on_rtnl_event, m);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, on_rtnl_event, m);
+ if (r < 0)
+ return r;
+
+ /* Then, enumerate all links */
+ r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_message_request_dump(req, true);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call(m->rtnl, req, 0, &reply);
+ if (r < 0)
+ return r;
+
+ for (i = reply; i; i = sd_rtnl_message_next(i)) {
+ r = manager_process_link(m->rtnl, i, m);
+ if (r < 0)
+ return r;
+ }
+
+ return r;
+}
+
+static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ Manager *m = userdata;
+ Iterator i;
+ Link *l;
+ int r;
+
+ assert(m);
+
+ sd_network_monitor_flush(m->network_monitor);
+
+ HASHMAP_FOREACH(l, m->links, i) {
+ r = link_update_monitor(l);
+ if (r < 0)
+ log_warning("Failed to update monitor information for %i: %s", l->ifindex, strerror(-r));
+ }
+
+ if (manager_all_configured(m))
+ sd_event_exit(m->event, 0);
+
+ return 0;
+}
+
+static int manager_network_monitor_listen(Manager *m) {
+ int r, fd, events;
+
+ assert(m);
+
+ r = sd_network_monitor_new(&m->network_monitor, NULL);
+ if (r < 0)
+ return r;
+
+ fd = sd_network_monitor_get_fd(m->network_monitor);
+ if (fd < 0)
+ return fd;
+
+ events = sd_network_monitor_get_events(m->network_monitor);
+ if (events < 0)
+ return events;
+
+ r = sd_event_add_io(m->event, &m->network_monitor_event_source,
+ fd, events, &on_network_event, m);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int manager_new(Manager **ret, char **interfaces) {
+ _cleanup_(manager_freep) Manager *m = NULL;
+ int r;
+
+ assert(ret);
+
+ m = new0(Manager, 1);
+ if (!m)
+ return -ENOMEM;
+
+ m->interfaces = interfaces;
+
+ r = sd_event_default(&m->event);
+ if (r < 0)
+ return r;
+
+ sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
+ sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
+
+ sd_event_set_watchdog(m->event, true);
+
+ r = manager_network_monitor_listen(m);
+ if (r < 0)
+ return r;
+
+ r = manager_rtnl_listen(m);
+ if (r < 0)
+ return r;
+
+ *ret = m;
+ m = NULL;
+
+ return 0;
+}
+
+void manager_free(Manager *m) {
+ Link *l;
+
+ if (!m)
+ return;
+
+ while ((l = hashmap_first(m->links)))
+ link_free(l);
+ hashmap_free(m->links);
+ hashmap_free(m->links_by_name);
+
+ sd_event_source_unref(m->network_monitor_event_source);
+ sd_network_monitor_unref(m->network_monitor);
+
+ sd_event_source_unref(m->rtnl_event_source);
+ sd_rtnl_unref(m->rtnl);
+
+ sd_event_unref(m->event);
+ free(m);
+
+ return;
+}
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