X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fnetwork%2Fnetworkd-manager.c;h=ddbdabbff903ece3bbecde8fb76b87dbc09c243c;hp=1b3e71ab0eb7ac6a180cb200213c6bb0893355ba;hb=2292547af9638e2b3f7e0e96a56dd6c909e516dc;hpb=a6cc569e33a05b07550c6c7b4d67d83d868f8bc1 diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c index 1b3e71ab0..ddbdabbff 100644 --- a/src/network/networkd-manager.c +++ b/src/network/networkd-manager.c @@ -27,16 +27,49 @@ #include "udev-util.h" #include "rtnl-util.h" #include "mkdir.h" +#include "virt.h" const char* const network_dirs[] = { "/etc/systemd/network", "/run/systemd/network", "/usr/lib/systemd/network", -#ifdef HAVE_SPLIT_USER +#ifdef HAVE_SPLIT_USR "/lib/systemd/network", #endif NULL}; +static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) { + Manager *m = userdata; + + assert(m); + + log_received_signal(LOG_INFO, si); + + sd_event_exit(m->event, 0); + return 0; +} + +static int setup_signals(Manager *m) { + sigset_t mask; + int r; + + assert(m); + + assert_se(sigemptyset(&mask) == 0); + sigset_add_many(&mask, SIGINT, SIGTERM, -1); + assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); + + r = sd_event_add_signal(m->event, &m->sigterm_event_source, SIGTERM, dispatch_sigterm, m); + if (r < 0) + return r; + + r = sd_event_add_signal(m->event, &m->sigint_event_source, SIGINT, dispatch_sigterm, m); + if (r < 0) + return r; + + return 0; +} + int manager_new(Manager **ret) { _cleanup_manager_free_ Manager *m = NULL; int r; @@ -51,7 +84,7 @@ int manager_new(Manager **ret) { sd_event_set_watchdog(m->event, true); - r = sd_rtnl_open(RTMGRP_LINK | RTMGRP_IPV4_IFADDR, &m->rtnl); + r = sd_rtnl_open(&m->rtnl, RTMGRP_LINK | RTMGRP_IPV4_IFADDR); if (r < 0) return r; @@ -59,13 +92,26 @@ int manager_new(Manager **ret) { if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */ return r; + r = setup_signals(m); + if (r < 0) + return r; + 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; + /* udev does not initialize devices inside containers, + * so we rely on them being already initialized before + * entering the container */ + if (detect_container(NULL) > 0) { + m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "kernel"); + if (!m->udev_monitor) + return -ENOMEM; + } else { + m->udev_monitor = udev_monitor_new_from_netlink(m->udev, "udev"); + if (!m->udev_monitor) + return -ENOMEM; + } m->links = hashmap_new(uint64_hash_func, uint64_compare_func); if (!m->links) @@ -85,22 +131,27 @@ int manager_new(Manager **ret) { void manager_free(Manager *m) { Network *network; - Netdev *netdev; + NetDev *netdev; Link *link; + if (!m) + return; + udev_monitor_unref(m->udev_monitor); udev_unref(m->udev); sd_bus_unref(m->bus); sd_event_source_unref(m->udev_event_source); + sd_event_source_unref(m->sigterm_event_source); + sd_event_source_unref(m->sigint_event_source); sd_event_unref(m->event); - while ((network = m->networks)) - network_free(network); - while ((link = hashmap_first(m->links))) link_free(link); hashmap_free(m->links); + while ((network = m->networks)) + network_free(network); + while ((netdev = hashmap_first(m->netdevs))) netdev_free(netdev); hashmap_free(m->netdevs); @@ -132,30 +183,31 @@ bool manager_should_reload(Manager *m) { } static int manager_process_link(Manager *m, struct udev_device *device) { - Link *link; + Link *link = NULL; int r; - if (streq_ptr(udev_device_get_action(device), "remove")) { - uint64_t ifindex; + assert(m); + assert(device); + link_get(m, udev_device_get_ifindex(device), &link); + + if (streq_ptr(udev_device_get_action(device), "remove")) { log_debug("%s: link removed", udev_device_get_sysname(device)); - ifindex = udev_device_get_ifindex(device); - link = hashmap_get(m->links, &ifindex); - if (!link) + if (link) + link_free(link); + } else { + if (link) { + log_debug("%s: link already exists, ignoring", + link->ifname); return 0; + } - link_free(link); - } else { r = link_add(m, device, &link); if (r < 0) { - if (r == -EEXIST) - log_debug("%s: link already exists, ignoring", - link->ifname); - else - log_error("%s: could not handle link: %s", - udev_device_get_sysname(device), - strerror(-r)); + log_error("%s: could not handle link: %s", + udev_device_get_sysname(device), + strerror(-r)); } else log_debug("%s: link (with ifindex %" PRIu64") added", link->ifname, link->ifindex); @@ -179,9 +231,14 @@ int manager_udev_enumerate_links(Manager *m) { if (r < 0) return r; - r = udev_enumerate_add_match_is_initialized(e); - if (r < 0) - return 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) { + r = udev_enumerate_add_match_is_initialized(e); + if (r < 0) + return r; + } r = udev_enumerate_scan_devices(e); if (r < 0) @@ -233,9 +290,10 @@ int manager_udev_listen(Manager *m) { } r = sd_event_add_io(m->event, + &m->udev_event_source, udev_monitor_get_fd(m->udev_monitor), EPOLLIN, manager_dispatch_link_udev, - m, &m->udev_event_source); + m); if (r < 0) return r; @@ -245,34 +303,32 @@ int manager_udev_listen(Manager *m) { static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) { Manager *m = userdata; Link *link; - const char *name; - uint64_t ifindex_64; + char *name; int r, ifindex; + assert(rtnl); + assert(message); + assert(m); + r = sd_rtnl_message_link_get_ifindex(message, &ifindex); if (r < 0 || ifindex <= 0) { - log_debug("received RTM_NEWLINK message without valid ifindex"); + log_warning("received RTM_NEWLINK message without valid ifindex"); return 0; } - r = rtnl_message_link_get_ifname(message, &name); + r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name); if (r < 0) - log_debug("received RTM_NEWLINK message without valid IFLA_IFNAME"); + log_warning("received RTM_NEWLINK message without valid ifname"); else { - Netdev *netdev; + NetDev *netdev; r = netdev_get(m, name, &netdev); - if (r >= 0) { - r = netdev_set_ifindex(netdev, ifindex); - if (r < 0) - log_debug("could not set ifindex of netdev '%s' to %d: %s", - name, ifindex, strerror(-r)); - } + if (r >= 0) + netdev_set_ifindex(netdev, message); } - ifindex_64 = ifindex; - link = hashmap_get(m->links, &ifindex_64); - if (!link) { + r = link_get(m, ifindex, &link); + if (r < 0) { log_debug("received RTM_NEWLINK message for untracked ifindex %d", ifindex); return 0; } @@ -347,10 +403,6 @@ int manager_update_resolv_conf(Manager *m) { assert(m); - r = mkdir_safe_label("/run/systemd/network", 0755, 0, 0); - if (r < 0) - return r; - r = fopen_temporary("/run/systemd/network/resolv.conf", &f, &temp_path); if (r < 0) return r; @@ -386,10 +438,17 @@ int manager_update_resolv_conf(Manager *m) { } } - HASHMAP_FOREACH(link, m->links, i) - if (link->network && link->network->dns) - append_dns(f, &link->network->dns->in_addr.in, - link->network->dns->family, &count); + HASHMAP_FOREACH(link, m->links, i) { + if (link->network && link->network->dns) { + Address *address; + Iterator j; + + SET_FOREACH(address, link->network->dns, j) { + append_dns(f, &address->in_addr.in, + address->family, &count); + } + } + } fflush(f);