| /*-*- 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 "netlink-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_netlink *rtnl, sd_netlink_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_netlink_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_netlink_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_netlink *rtnl, sd_netlink_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_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL; |
| sd_netlink_message *i; |
| int r; |
| |
| assert(m); |
| |
| /* First, subscribe to interfaces coming and going */ |
| r = sd_netlink_open(&m->rtnl); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_attach_event(m->rtnl, m->event, 0); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, on_rtnl_event, m); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_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_netlink_message_request_dump(req, true); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_call(m->rtnl, req, 0, &reply); |
| if (r < 0) |
| return r; |
| |
| for (i = reply; i; i = sd_netlink_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_netlink_unref(m->rtnl); |
| |
| sd_event_unref(m->event); |
| free(m); |
| |
| return; |
| } |