diff options
Diffstat (limited to 'src/network/networkd-manager.c')
| -rw-r--r-- | src/network/networkd-manager.c | 880 |
1 files changed, 0 insertions, 880 deletions
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c deleted file mode 100644 index 0e204ebae6..0000000000 --- a/src/network/networkd-manager.c +++ /dev/null @@ -1,880 +0,0 @@ -/*-*- 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 <sys/socket.h> -#include <linux/if.h> - -#include "conf-parser.h" -#include "path-util.h" -#include "networkd.h" -#include "networkd-netdev.h" -#include "networkd-link.h" -#include "libudev-private.h" -#include "udev-util.h" -#include "rtnl-util.h" -#include "bus-util.h" -#include "def.h" -#include "virt.h" - -#include "sd-rtnl.h" -#include "sd-daemon.h" - -/* use 8 MB for receive socket kernel queue. */ -#define RCVBUF_SIZE (8*1024*1024) - -const char* const network_dirs[] = { - "/etc/systemd/network", - "/run/systemd/network", - "/usr/lib/systemd/network", -#ifdef HAVE_SPLIT_USR - "/lib/systemd/network", -#endif - NULL}; - -static int setup_default_address_pool(Manager *m) { - AddressPool *p; - int r; - - assert(m); - - /* Add in the well-known private address ranges. */ - - r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7); - if (r < 0) - return r; - - r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16); - if (r < 0) - return r; - - r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12); - if (r < 0) - return r; - - r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8); - if (r < 0) - return r; - - return 0; -} - -static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) { - Manager *m = userdata; - - assert(s); - assert(m); - - m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source); - - manager_connect_bus(m); - - return 0; -} - -static int manager_reset_all(Manager *m) { - Link *link; - Iterator i; - int r; - - assert(m); - - HASHMAP_FOREACH(link, m->links, i) { - r = link_carrier_reset(link); - if (r < 0) - log_link_warning_errno(link, r, "could not reset carrier: %m"); - } - - return 0; -} - -static int match_prepare_for_sleep(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *ret_error) { - Manager *m = userdata; - int b, r; - - assert(bus); - assert(bus); - - r = sd_bus_message_read(message, "b", &b); - if (r < 0) { - log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m"); - return 0; - } - - if (b) - return 0; - - log_debug("Coming back from suspend, resetting all connections..."); - - manager_reset_all(m); - - return 0; -} - -int manager_connect_bus(Manager *m) { - int r; - - assert(m); - - r = sd_bus_default_system(&m->bus); - if (r == -ENOENT) { - /* We failed to connect? Yuck, we must be in early - * boot. Let's try in 5s again. As soon as we have - * kdbus we can stop doing this... */ - - log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m"); - - r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m); - if (r < 0) - return log_error_errno(r, "Failed to install bus reconnect time event: %m"); - - return 0; - } if (r < 0) - return r; - - r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot, - "type='signal'," - "sender='org.freedesktop.login1'," - "interface='org.freedesktop.login1.Manager'," - "member='PrepareForSleep'," - "path='/org/freedesktop/login1'", - match_prepare_for_sleep, - m); - if (r < 0) - return log_error_errno(r, "Failed to add match for PrepareForSleep: %m"); - - r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/network1", "org.freedesktop.network1.Manager", manager_vtable, m); - if (r < 0) - return log_error_errno(r, "Failed to add manager object vtable: %m"); - - r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/link", "org.freedesktop.network1.Link", link_vtable, link_object_find, m); - if (r < 0) - return log_error_errno(r, "Failed to add link object vtable: %m"); - - r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/link", link_node_enumerator, m); - if (r < 0) - return log_error_errno(r, "Failed to add link enumerator: %m"); - - r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/network1/network", "org.freedesktop.network1.Network", network_vtable, network_object_find, m); - if (r < 0) - return log_error_errno(r, "Failed to add network object vtable: %m"); - - r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/network1/network", network_node_enumerator, m); - if (r < 0) - return log_error_errno(r, "Failed to add network enumerator: %m"); - - r = sd_bus_request_name(m->bus, "org.freedesktop.network1", 0); - if (r < 0) - return log_error_errno(r, "Failed to register name: %m"); - - r = sd_bus_attach_event(m->bus, m->event, 0); - if (r < 0) - return log_error_errno(r, "Failed to attach bus to event loop: %m"); - - return 0; -} - -static int manager_udev_process_link(Manager *m, struct udev_device *device) { - Link *link = NULL; - int r, ifindex; - - assert(m); - assert(device); - - if (!streq_ptr(udev_device_get_action(device), "add")) - return 0; - - ifindex = udev_device_get_ifindex(device); - if (ifindex <= 0) { - log_debug("ignoring udev ADD event for device with invalid ifindex"); - return 0; - } - - r = link_get(m, ifindex, &link); - if (r == -ENODEV) - return 0; - else if (r < 0) - return r; - - r = link_initialized(link, device); - if (r < 0) - return r; - - return 0; -} - -static int manager_dispatch_link_udev(sd_event_source *source, int fd, uint32_t revents, void *userdata) { - Manager *m = userdata; - struct udev_monitor *monitor = m->udev_monitor; - _cleanup_udev_device_unref_ struct udev_device *device = NULL; - - device = udev_monitor_receive_device(monitor); - if (!device) - return -ENOMEM; - - manager_udev_process_link(m, device); - return 0; -} - -static int manager_connect_udev(Manager *m) { - int r; - - /* udev does not initialize devices inside containers, - * so we rely on them being already initialized before - * entering the container */ - if (detect_container(NULL) > 0) - return 0; - - m->udev = udev_new(); - if (!m->udev) - return -ENOMEM; - - m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); - if (!m->udev_monitor) - return -ENOMEM; - - r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL); - if (r < 0) - return log_error_errno(r, "Could not add udev monitor filter: %m"); - - r = udev_monitor_enable_receiving(m->udev_monitor); - if (r < 0) { - log_error("Could not enable udev monitor"); - return r; - } - - r = sd_event_add_io(m->event, - &m->udev_event_source, - udev_monitor_get_fd(m->udev_monitor), - EPOLLIN, manager_dispatch_link_udev, - m); - if (r < 0) - return r; - - r = sd_event_source_set_description(m->udev_event_source, "networkd-udev"); - if (r < 0) - return r; - - return 0; -} - -static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) { - Manager *m = userdata; - Link *link = NULL; - NetDev *netdev = NULL; - uint16_t type; - const char *name; - int r, ifindex; - - assert(rtnl); - assert(message); - assert(m); - - if (sd_rtnl_message_is_error(message)) { - r = sd_rtnl_message_get_errno(message); - if (r < 0) - log_warning_errno(r, "rtnl: could not receive link: %m"); - - return 0; - } - - r = sd_rtnl_message_get_type(message, &type); - if (r < 0) { - log_warning_errno(r, "rtnl: could not get message type: %m"); - return 0; - } else if (type != RTM_NEWLINK && type != RTM_DELLINK) { - log_warning("rtnl: received unexpected message type when processing link"); - return 0; - } - - r = sd_rtnl_message_link_get_ifindex(message, &ifindex); - if (r < 0) { - log_warning_errno(r, "rtnl: could not get ifindex from link: %m"); - return 0; - } else if (ifindex <= 0) { - log_warning("rtnl: received link message with invalid ifindex: %d", ifindex); - return 0; - } else - link_get(m, ifindex, &link); - - r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name); - if (r < 0) { - log_warning_errno(r, "rtnl: received link message without ifname: %m"); - return 0; - } else - netdev_get(m, name, &netdev); - - switch (type) { - case RTM_NEWLINK: - if (!link) { - /* link is new, so add it */ - r = link_add(m, message, &link); - if (r < 0) { - log_warning_errno(r, "could not add new link: %m"); - return 0; - } - } - - if (netdev) { - /* netdev exists, so make sure the ifindex matches */ - r = netdev_set_ifindex(netdev, message); - if (r < 0) { - log_warning_errno(r, "could not set ifindex on netdev: %m"); - return 0; - } - } - - r = link_update(link, message); - if (r < 0) - return 0; - - break; - - case RTM_DELLINK: - link_drop(link); - netdev_drop(netdev); - - break; - - default: - assert_not_reached("Received invalid RTNL message type."); - } - - return 1; -} - -static int systemd_netlink_fd(void) { - int n, fd, rtnl_fd = -EINVAL; - - n = sd_listen_fds(true); - if (n <= 0) - return -EINVAL; - - for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd ++) { - if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) { - if (rtnl_fd >= 0) - return -EINVAL; - - rtnl_fd = fd; - } - } - - return rtnl_fd; -} - -static int manager_connect_rtnl(Manager *m) { - int fd, r; - - assert(m); - - fd = systemd_netlink_fd(); - if (fd < 0) - r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR); - else - r = sd_rtnl_open_fd(&m->rtnl, fd, 0); - if (r < 0) - return r; - - r = sd_rtnl_inc_rcvbuf(m->rtnl, RCVBUF_SIZE); - 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, &manager_rtnl_process_link, m); - if (r < 0) - return r; - - r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, &manager_rtnl_process_link, m); - if (r < 0) - return r; - - r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, &link_rtnl_process_address, m); - if (r < 0) - return r; - - r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, &link_rtnl_process_address, m); - if (r < 0) - return r; - - return 0; -} - -int manager_new(Manager **ret) { - _cleanup_manager_free_ Manager *m = NULL; - int r; - - m = new0(Manager, 1); - if (!m) - return -ENOMEM; - - m->state_file = strdup("/run/systemd/netif/state"); - if (!m->state_file) - return -ENOMEM; - - r = sd_event_default(&m->event); - if (r < 0) - return r; - - sd_event_set_watchdog(m->event, true); - - sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); - sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); - - r = manager_connect_rtnl(m); - if (r < 0) - return r; - - r = manager_connect_udev(m); - if (r < 0) - return r; - - m->netdevs = hashmap_new(&string_hash_ops); - if (!m->netdevs) - return -ENOMEM; - - LIST_HEAD_INIT(m->networks); - - r = setup_default_address_pool(m); - if (r < 0) - return r; - - *ret = m; - m = NULL; - - return 0; -} - -void manager_free(Manager *m) { - Network *network; - NetDev *netdev; - Link *link; - AddressPool *pool; - - if (!m) - return; - - free(m->state_file); - - udev_monitor_unref(m->udev_monitor); - udev_unref(m->udev); - sd_bus_unref(m->bus); - sd_bus_slot_unref(m->prepare_for_sleep_slot); - sd_event_source_unref(m->udev_event_source); - sd_event_source_unref(m->bus_retry_event_source); - sd_event_unref(m->event); - - while ((link = hashmap_first(m->links))) - link_unref(link); - hashmap_free(m->links); - - while ((network = m->networks)) - network_free(network); - - hashmap_free(m->networks_by_name); - - while ((netdev = hashmap_first(m->netdevs))) - netdev_unref(netdev); - hashmap_free(m->netdevs); - - while ((pool = m->address_pools)) - address_pool_free(pool); - - sd_rtnl_unref(m->rtnl); - - free(m); -} - -static bool manager_check_idle(void *userdata) { - Manager *m = userdata; - Link *link; - Iterator i; - - assert(m); - - HASHMAP_FOREACH(link, m->links, i) { - /* we are not woken on udev activity, so let's just wait for the - * pending udev event */ - if (link->state == LINK_STATE_PENDING) - return false; - - if (!link->network) - continue; - - /* we are not woken on netork activity, so let's stay around */ - if (link_lldp_enabled(link) || - link_ipv4ll_enabled(link) || - link_dhcp4_server_enabled(link) || - link_dhcp4_enabled(link) || - link_dhcp6_enabled(link)) - return false; - } - - return true; -} - -int manager_run(Manager *m) { - assert(m); - - if (m->bus) - return bus_event_loop_with_idle( - m->event, - m->bus, - "org.freedesktop.network1", - DEFAULT_EXIT_USEC, - manager_check_idle, - m); - else - /* failed to connect to the bus, so we lose exit-on-idle logic, - this should not happen except if dbus is not around at all */ - return sd_event_loop(m->event); -} - -int manager_load_config(Manager *m) { - int r; - - /* update timestamp */ - paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, true); - - r = netdev_load(m); - if (r < 0) - return r; - - r = network_load(m); - if (r < 0) - return r; - - return 0; -} - -bool manager_should_reload(Manager *m) { - return paths_check_timestamp(network_dirs, &m->network_dirs_ts_usec, false); -} - -int manager_rtnl_enumerate_links(Manager *m) { - _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL; - sd_rtnl_message *link; - int r; - - assert(m); - assert(m->rtnl); - - 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 (link = reply; link; link = sd_rtnl_message_next(link)) { - int k; - - m->enumerating = true; - - k = manager_rtnl_process_link(m->rtnl, link, m); - if (k < 0) - r = k; - - m->enumerating = false; - } - - return r; -} - -int manager_rtnl_enumerate_addresses(Manager *m) { - _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL; - sd_rtnl_message *addr; - int r; - - assert(m); - assert(m->rtnl); - - r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 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 (addr = reply; addr; addr = sd_rtnl_message_next(addr)) { - int k; - - m->enumerating = true; - - k = link_rtnl_process_address(m->rtnl, addr, m); - if (k < 0) - r = k; - - m->enumerating = false; - } - - return r; -} - -static int set_put_in_addr(Set *s, const struct in_addr *address) { - char *p; - int r; - - assert(s); - - r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p); - if (r < 0) - return r; - - r = set_consume(s, p); - if (r == -EEXIST) - return 0; - - return r; -} - -static int set_put_in_addrv(Set *s, const struct in_addr *addresses, int n) { - int r, i, c = 0; - - assert(s); - assert(n <= 0 || addresses); - - for (i = 0; i < n; i++) { - r = set_put_in_addr(s, addresses+i); - if (r < 0) - return r; - - c += r; - } - - return c; -} - -static void print_string_set(FILE *f, const char *field, Set *s) { - bool space = false; - Iterator i; - char *p; - - if (set_isempty(s)) - return; - - fputs(field, f); - - SET_FOREACH(p, s, i) { - if (space) - fputc(' ', f); - fputs(p, f); - space = true; - } - fputc('\n', f); -} - -int manager_save(Manager *m) { - _cleanup_set_free_free_ Set *dns = NULL, *ntp = NULL, *domains = NULL; - Link *link; - Iterator i; - _cleanup_free_ char *temp_path = NULL; - _cleanup_fclose_ FILE *f = NULL; - LinkOperationalState operstate = LINK_OPERSTATE_OFF; - const char *operstate_str; - int r; - - assert(m); - assert(m->state_file); - - /* We add all NTP and DNS server to a set, to filter out duplicates */ - dns = set_new(&string_hash_ops); - if (!dns) - return -ENOMEM; - - ntp = set_new(&string_hash_ops); - if (!ntp) - return -ENOMEM; - - domains = set_new(&string_hash_ops); - if (!domains) - return -ENOMEM; - - HASHMAP_FOREACH(link, m->links, i) { - if (link->flags & IFF_LOOPBACK) - continue; - - if (link->operstate > operstate) - operstate = link->operstate; - - if (!link->network) - continue; - - /* First add the static configured entries */ - r = set_put_strdupv(dns, link->network->dns); - if (r < 0) - return r; - - r = set_put_strdupv(ntp, link->network->ntp); - if (r < 0) - return r; - - r = set_put_strdupv(domains, link->network->domains); - if (r < 0) - return r; - - if (!link->dhcp_lease) - continue; - - /* Secondly, add the entries acquired via DHCP */ - if (link->network->dhcp_dns) { - const struct in_addr *addresses; - - r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses); - if (r > 0) { - r = set_put_in_addrv(dns, addresses, r); - if (r < 0) - return r; - } else if (r < 0 && r != -ENOENT) - return r; - } - - if (link->network->dhcp_ntp) { - const struct in_addr *addresses; - - r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses); - if (r > 0) { - r = set_put_in_addrv(ntp, addresses, r); - if (r < 0) - return r; - } else if (r < 0 && r != -ENOENT) - return r; - } - - if (link->network->dhcp_domains) { - const char *domainname; - - r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname); - if (r >= 0) { - r = set_put_strdup(domains, domainname); - if (r < 0) - return r; - } else if (r != -ENOENT) - return r; - } - } - - operstate_str = link_operstate_to_string(operstate); - assert(operstate_str); - - r = fopen_temporary(m->state_file, &f, &temp_path); - if (r < 0) - return r; - - fchmod(fileno(f), 0644); - - fprintf(f, - "# This is private data. Do not parse.\n" - "OPER_STATE=%s\n", operstate_str); - - print_string_set(f, "DNS=", dns); - print_string_set(f, "NTP=", ntp); - print_string_set(f, "DOMAINS=", domains); - - r = fflush_and_check(f); - if (r < 0) - goto fail; - - if (rename(temp_path, m->state_file) < 0) { - r = -errno; - goto fail; - } - - if (m->operational_state != operstate) { - m->operational_state = operstate; - r = manager_send_changed(m, "OperationalState", NULL); - if (r < 0) - log_error_errno(r, "Could not emit changed OperationalState: %m"); - } - - return 0; - -fail: - log_error_errno(r, "Failed to save network state to %s: %m", m->state_file); - unlink(m->state_file); - unlink(temp_path); - return r; -} - -int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) { - AddressPool *p; - int r; - - assert(m); - assert(prefixlen > 0); - assert(found); - - LIST_FOREACH(address_pools, p, m->address_pools) { - if (p->family != family) - continue; - - r = address_pool_acquire(p, prefixlen, found); - if (r != 0) - return r; - } - - return 0; -} - -const char *address_family_boolean_to_string(AddressFamilyBoolean b) { - if (b == ADDRESS_FAMILY_YES || - b == ADDRESS_FAMILY_NO) - return yes_no(b == ADDRESS_FAMILY_YES); - - if (b == ADDRESS_FAMILY_IPV4) - return "ipv4"; - if (b == ADDRESS_FAMILY_IPV6) - return "ipv6"; - - return NULL; -} - -AddressFamilyBoolean address_family_boolean_from_string(const char *s) { - int r; - - /* Make this a true superset of a boolean */ - - r = parse_boolean(s); - if (r > 0) - return ADDRESS_FAMILY_YES; - if (r == 0) - return ADDRESS_FAMILY_NO; - - if (streq(s, "ipv4")) - return ADDRESS_FAMILY_IPV4; - if (streq(s, "ipv6")) - return ADDRESS_FAMILY_IPV6; - - return _ADDRESS_FAMILY_BOOLEAN_INVALID; -} - -DEFINE_CONFIG_PARSE_ENUM(config_parse_address_family_boolean, address_family_boolean, AddressFamilyBoolean, "Failed to parse option"); |