-/*-*- 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 <fnmatch.h>
-
-#include "rtnl-util.h"
-
-#include "network-internal.h"
-#include "networkd-wait-online-link.h"
-#include "networkd-wait-online.h"
-
-#include "util.h"
-#include "time-util.h"
-
-bool manager_ignore_link(Manager *m, Link *link) {
- char **ignore;
-
- assert(m);
- assert(link);
-
- if (link->flags & IFF_LOOPBACK)
- return true;
-
- STRV_FOREACH(ignore, m->ignore)
- if (fnmatch(*ignore, link->ifname, 0) == 0)
- return true;
-
- return false;
-}
-
-bool manager_all_configured(Manager *m) {
- Iterator i;
- Link *l;
- char **ifname;
- bool one_ready = false;
-
- /* wait for all the links given on the command line 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 (manager_ignore_link(m, l)) {
- log_info("ignoring: %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;
- const 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_errno(r, "Failed to process RTNL link message: %m");
- 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, subscribe 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_errno(r, "Failed to update monitor information for %i: %m", l->ifindex);
- }
-
- 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, char **ignore, usec_t timeout) {
- _cleanup_(manager_freep) Manager *m = NULL;
- int r;
-
- assert(ret);
-
- m = new0(Manager, 1);
- if (!m)
- return -ENOMEM;
-
- m->interfaces = interfaces;
- m->ignore = ignore;
-
- 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);
-
- if (timeout > 0) {
- usec_t usec;
-
- usec = now(clock_boottime_or_monotonic()) + timeout;
-
- r = sd_event_add_time(m->event, NULL, clock_boottime_or_monotonic(), usec, 0, NULL, INT_TO_PTR(-ETIMEDOUT));
- if (r < 0)
- return r;
- }
-
- 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;
-}
~ianmdlvl / elogind.git / blobdiff