X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fnetwork%2Fnetworkd-link.c;h=5a7472ba24a09dcdb2337fbf4f8b2d37de0cb493;hp=4044f0b5a52e65dfd6e0febd4957b809c80dd797;hb=091a364c802e34a58f3260c9cb5db9b75c62215c;hpb=b5db00e52ee2e20578839e4e4488f7b9af9abc38 diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c index 4044f0b5a..5a7472ba2 100644 --- a/src/network/networkd-link.c +++ b/src/network/networkd-link.c @@ -24,67 +24,103 @@ #include "networkd.h" #include "libudev-private.h" +#include "udev-util.h" #include "util.h" +#include "virt.h" #include "bus-util.h" -#include "net-util.h" +#include "network-internal.h" +#include "network-util.h" #include "dhcp-lease-internal.h" -int link_new(Manager *manager, struct udev_device *device, Link **ret) { - _cleanup_link_free_ Link *link = NULL; - const char *ifname; - int r; +static int ipv4ll_address_update(Link *link, bool deprecate); +static bool ipv4ll_is_bound(sd_ipv4ll *ll); + +static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) { + _cleanup_link_unref_ Link *link = NULL; + uint16_t type; + char *ifname; + int r, ifindex; assert(manager); assert(manager->links); - assert(device); + assert(message); assert(ret); + r = sd_rtnl_message_get_type(message, &type); + if (r < 0) + return r; + else if (type != RTM_NEWLINK) + return -EINVAL; + + r = sd_rtnl_message_link_get_ifindex(message, &ifindex); + if (r < 0) + return r; + else if (ifindex <= 0) + return -EINVAL; + + r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname); + if (r < 0) + return r; + link = new0(Link, 1); if (!link) return -ENOMEM; + link->n_ref = 1; link->manager = manager; - link->state = _LINK_STATE_INVALID; - - link->ifindex = udev_device_get_ifindex(device); - if (link->ifindex <= 0) - return -EINVAL; + link->state = LINK_STATE_INITIALIZING; + link->ifindex = ifindex; + link->ifname = strdup(ifname); + if (!link->ifname) + return -ENOMEM; r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64, link->ifindex); if (r < 0) return -ENOMEM; - ifname = udev_device_get_sysname(device); - link->ifname = strdup(ifname); + r = asprintf(&link->lease_file, "/run/systemd/network/leases/%"PRIu64, + link->ifindex); + if (r < 0) + return -ENOMEM; r = hashmap_put(manager->links, &link->ifindex, link); if (r < 0) return r; - link->udev_device = udev_device_ref(device); - *ret = link; link = NULL; return 0; } -void link_free(Link *link) { +static void link_free(Link *link) { + Address *address; + if (!link) return; assert(link->manager); - sd_dhcp_client_free(link->dhcp_client); + while ((address = link->addresses)) { + LIST_REMOVE(addresses, link->addresses, address); + address_free(address); + } + + sd_dhcp_client_unref(link->dhcp_client); sd_dhcp_lease_unref(link->dhcp_lease); - sd_ipv4ll_free(link->ipv4ll); + unlink(link->lease_file); + free(link->lease_file); + + sd_ipv4ll_unref(link->ipv4ll); hashmap_remove(link->manager->links, &link->ifindex); free(link->ifname); + + unlink(link->state_file); free(link->state_file); udev_device_unref(link->udev_device); @@ -92,6 +128,20 @@ void link_free(Link *link) { free(link); } +Link *link_unref(Link *link) { + if (link && (-- link->n_ref <= 0)) + link_free(link); + + return NULL; +} + +Link *link_ref(Link *link) { + if (link) + assert_se(++ link->n_ref >= 2); + + return link; +} + int link_get(Manager *m, int ifindex, Link **ret) { Link *link; uint64_t ifindex_64; @@ -111,6 +161,19 @@ int link_get(Manager *m, int ifindex, Link **ret) { return 0; } +void link_drop(Link *link) { + if (!link || link->state == LINK_STATE_LINGER) + return; + + link->state = LINK_STATE_LINGER; + + log_debug_link(link, "link removed"); + + link_unref(link); + + return; +} + static int link_enter_configured(Link *link) { assert(link); assert(link->state == LINK_STATE_SETTING_ROUTES); @@ -124,13 +187,61 @@ static int link_enter_configured(Link *link) { return 0; } +static void link_enter_unmanaged(Link *link) { + assert(link); + + log_debug_link(link, "unmanaged"); + + link->state = LINK_STATE_UNMANAGED; + + link_save(link); +} + +static int link_stop_clients(Link *link) { + int r = 0, k; + + assert(link); + assert(link->manager); + assert(link->manager->event); + + if (!link->network) + return 0; + + if (link->network->dhcp) { + assert(link->dhcp_client); + + k = sd_dhcp_client_stop(link->dhcp_client); + if (k < 0) { + log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); + r = k; + } + } + + if (link->network->ipv4ll) { + assert(link->ipv4ll); + + k = sd_ipv4ll_stop(link->ipv4ll); + if (k < 0) { + log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r)); + r = k; + } + } + + return r; +} + static void link_enter_failed(Link *link) { assert(link); + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) + return; + log_warning_link(link, "failed"); link->state = LINK_STATE_FAILED; + link_stop_clients(link); + link_save(link); } @@ -139,19 +250,22 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { int r; assert(link->route_messages > 0); - assert(link->state == LINK_STATE_SETTING_ADDRESSES || - link->state == LINK_STATE_SETTING_ROUTES || - link->state == LINK_STATE_FAILED); + assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, + LINK_STATE_SETTING_ROUTES, LINK_STATE_FAILED, + LINK_STATE_LINGER)); link->route_messages --; - if (link->state == LINK_STATE_FAILED) + if (IN_SET(LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); return 1; + } r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -EEXIST) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not set route: %s", + "MESSAGE=%*s: could not set route: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -163,12 +277,13 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { link_enter_configured(link); } + link_unref(link); + return 1; } static int link_enter_set_routes(Link *link) { Route *rt; - struct in_addr a; int r; assert(link); @@ -178,12 +293,12 @@ static int link_enter_set_routes(Link *link) { link->state = LINK_STATE_SETTING_ROUTES; if (!link->network->static_routes && !link->dhcp_lease && - (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0)) + (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) return link_enter_configured(link); log_debug_link(link, "setting routes"); - LIST_FOREACH(static_routes, rt, link->network->static_routes) { + LIST_FOREACH(routes, rt, link->network->static_routes) { r = route_configure(rt, link, &route_handler); if (r < 0) { log_warning_link(link, @@ -192,6 +307,7 @@ static int link_enter_set_routes(Link *link) { return r; } + link_ref(link); link->route_messages ++; } @@ -226,6 +342,7 @@ static int link_enter_set_routes(Link *link) { return r; } + link_ref(link); link->route_messages ++; } } @@ -236,55 +353,62 @@ static int link_enter_set_routes(Link *link) { struct in_addr gateway; r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); - if (r < 0) { - log_warning_link(link, "DHCP error: no router: %s", - strerror(-r)); + if (r < 0 && r != -ENOENT) { + log_warning_link(link, "DHCP error: %s", strerror(-r)); return r; } - r = route_new_dynamic(&route); - if (r < 0) { - log_error_link(link, "Could not allocate route: %s", - strerror(-r)); - return r; - } + if (r >= 0) { + r = route_new_dynamic(&route); + if (r < 0) { + log_error_link(link, "Could not allocate route: %s", + strerror(-r)); + return r; + } - r = route_new_dynamic(&route_gw); - if (r < 0) { - log_error_link(link, "Could not allocate route: %s", - strerror(-r)); - return r; - } + r = route_new_dynamic(&route_gw); + if (r < 0) { + log_error_link(link, "Could not allocate route: %s", + strerror(-r)); + return r; + } - /* The dhcp netmask may mask out the gateway. Add an explicit - * route for the gw host so that we can route no matter the - * netmask or existing kernel route tables. */ - route_gw->family = AF_INET; - route_gw->dst_addr.in = gateway; - route_gw->dst_prefixlen = 32; - route_gw->scope = RT_SCOPE_LINK; + /* The dhcp netmask may mask out the gateway. Add an explicit + * route for the gw host so that we can route no matter the + * netmask or existing kernel route tables. */ + route_gw->family = AF_INET; + route_gw->dst_addr.in = gateway; + route_gw->dst_prefixlen = 32; + route_gw->scope = RT_SCOPE_LINK; - r = route_configure(route_gw, link, &route_handler); - if (r < 0) { - log_warning_link(link, - "could not set host route: %s", strerror(-r)); - return r; - } + r = route_configure(route_gw, link, &route_handler); + if (r < 0) { + log_warning_link(link, + "could not set host route: %s", strerror(-r)); + return r; + } - link->route_messages ++; + link_ref(link); + link->route_messages ++; - route->family = AF_INET; - route->in_addr.in = gateway; + route->family = AF_INET; + route->in_addr.in = gateway; - r = route_configure(route, link, &route_handler); - if (r < 0) { - log_warning_link(link, - "could not set routes: %s", strerror(-r)); - link_enter_failed(link); - return r; + r = route_configure(route, link, &route_handler); + if (r < 0) { + log_warning_link(link, + "could not set routes: %s", strerror(-r)); + link_enter_failed(link); + return r; + } + + link_ref(link); + link->route_messages ++; } + } - link->route_messages ++; + if (link->route_messages == 0) { + link_enter_configured(link); } return 0; @@ -298,17 +422,22 @@ static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) assert(link); assert(link->ifname); - if (link->state == LINK_STATE_FAILED) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); return 1; + } r = sd_rtnl_message_get_errno(m); - if (r < 0 && r != -ENOENT) + if (r < 0 && r != -ESRCH) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not drop route: %s", + "MESSAGE=%*s: could not drop route: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); + link_unref(link); + return 0; } @@ -320,17 +449,21 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { assert(link); assert(link->ifname); assert(link->addr_messages > 0); - assert(link->state == LINK_STATE_SETTING_ADDRESSES || link->state == LINK_STATE_FAILED); + assert(IN_SET(link->state, LINK_STATE_SETTING_ADDRESSES, + LINK_STATE_FAILED, LINK_STATE_LINGER)); link->addr_messages --; - if (link->state == LINK_STATE_FAILED) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); return 1; + } r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -EEXIST) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not set address: %s", + "MESSAGE=%*s: could not set address: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); @@ -340,12 +473,13 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { link_enter_set_routes(link); } + link_unref(link); + return 1; } static int link_enter_set_addresses(Link *link) { Address *ad; - struct in_addr a; int r; assert(link); @@ -355,12 +489,12 @@ static int link_enter_set_addresses(Link *link) { link->state = LINK_STATE_SETTING_ADDRESSES; if (!link->network->static_addresses && !link->dhcp_lease && - (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0)) + (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false)) return link_enter_set_routes(link); log_debug_link(link, "setting addresses"); - LIST_FOREACH(static_addresses, ad, link->network->static_addresses) { + LIST_FOREACH(addresses, ad, link->network->static_addresses) { r = address_configure(ad, link, &address_handler); if (r < 0) { log_warning_link(link, @@ -369,6 +503,7 @@ static int link_enter_set_addresses(Link *link) { return r; } + link_ref(link); link->addr_messages ++; } @@ -404,6 +539,7 @@ static int link_enter_set_addresses(Link *link) { return r; } + link_ref(link); link->addr_messages ++; } } @@ -450,13 +586,14 @@ static int link_enter_set_addresses(Link *link) { return r; } + link_ref(link); link->addr_messages ++; } return 0; } -static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { +static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { Link *link = userdata; int r; @@ -464,45 +601,89 @@ static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdat assert(link); assert(link->ifname); - if (link->state == LINK_STATE_FAILED) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); return 1; + } r = sd_rtnl_message_get_errno(m); if (r < 0 && r != -ENOENT) log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not drop address: %s", + "MESSAGE=%*s: could not update address: %s", + IFNAMSIZ, + link->ifname, strerror(-r), + "ERRNO=%d", -r, + NULL); + + link_unref(link); + + return 0; +} + +static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { + Link *link = userdata; + int r; + + assert(m); + assert(link); + assert(link->ifname); + + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); + return 1; + } + + r = sd_rtnl_message_get_errno(m); + if (r < 0 && r != -EADDRNOTAVAIL) + log_struct_link(LOG_WARNING, link, + "MESSAGE=%*s: could not drop address: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); + link_unref(link); + return 0; } static int set_hostname_handler(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { + Link *link = userdata; int r; + assert(link); + + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); + return 1; + } + r = sd_bus_message_get_errno(m); if (r < 0) - log_warning("Could not set hostname: %s", strerror(-r)); + log_warning_link(link, "Could not set hostname: %s", strerror(-r)); + + link_unref(link); return 1; } -static int set_hostname(sd_bus *bus, const char *hostname) { +static int link_set_hostname(Link *link, const char *hostname) { _cleanup_bus_message_unref_ sd_bus_message *m = NULL; int r = 0; + assert(link); + assert(link->manager); assert(hostname); - log_debug("Setting transient hostname: '%s'", hostname); + log_debug_link(link, "Setting transient hostname: '%s'", hostname); - if (!bus) { /* TODO: replace by assert when we can rely on kdbus */ - log_info("Not connected to system bus, ignoring transient hostname."); + if (!link->manager->bus) { /* TODO: replace by assert when we can rely on kdbus */ + log_info_link(link, "Not connected to system bus, ignoring transient hostname."); return 0; } r = sd_bus_message_new_method_call( - bus, + link->manager->bus, &m, "org.freedesktop.hostname1", "/org/freedesktop/hostname1", @@ -515,9 +696,11 @@ static int set_hostname(sd_bus *bus, const char *hostname) { if (r < 0) return r; - r = sd_bus_call_async(bus, m, set_hostname_handler, NULL, 0, NULL); + r = sd_bus_call_async(link->manager->bus, NULL, m, set_hostname_handler, link, 0); if (r < 0) - log_error("Could not set transient hostname: %s", strerror(-r)); + log_error_link(link, "Could not set transient hostname: %s", strerror(-r)); + + link_ref(link); return r; } @@ -530,8 +713,10 @@ static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { assert(link); assert(link->ifname); - if (link->state == LINK_STATE_FAILED) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); return 1; + } r = sd_rtnl_message_get_errno(m); if (r < 0) @@ -541,6 +726,8 @@ static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { "ERRNO=%d", -r, NULL); + link_unref(link); + return 1; } @@ -574,13 +761,18 @@ static int link_set_mtu(Link *link, uint32_t mtu) { return r; } + link_unref(link); + return 0; } static int dhcp_lease_lost(Link *link) { _cleanup_address_free_ Address *address = NULL; + _cleanup_route_free_ Route *route_gw = NULL; + _cleanup_route_free_ Route *route = NULL; struct in_addr addr; struct in_addr netmask; + struct in_addr gateway; unsigned prefixlen; int r; @@ -591,6 +783,29 @@ static int dhcp_lease_lost(Link *link) { r = address_new_dynamic(&address); if (r >= 0) { + r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway); + if (r >= 0) { + r = route_new_dynamic(&route_gw); + if (r >= 0) { + route_gw->family = AF_INET; + route_gw->dst_addr.in = gateway; + route_gw->dst_prefixlen = 32; + route_gw->scope = RT_SCOPE_LINK; + + route_drop(route_gw, link, &route_drop_handler); + link_ref(link); + } + + r = route_new_dynamic(&route); + if (r >= 0) { + route->family = AF_INET; + route->in_addr.in = gateway; + + route_drop(route, link, &route_drop_handler); + link_ref(link); + } + } + sd_dhcp_lease_get_address(link->dhcp_lease, &addr); sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask); prefixlen = net_netmask_to_prefixlen(&netmask); @@ -600,6 +815,7 @@ static int dhcp_lease_lost(Link *link) { address->prefixlen = prefixlen; address_drop(address, link, &address_drop_handler); + link_ref(link); } if (link->network->dhcp_mtu) { @@ -621,9 +837,9 @@ static int dhcp_lease_lost(Link *link) { r = sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname); if (r >= 0 && hostname) { - r = set_hostname(link->manager->bus, ""); + r = link_set_hostname(link, ""); if (r < 0) - log_error("Failed to reset transient hostname"); + log_error_link(link, "Failed to reset transient hostname"); } } @@ -638,8 +854,6 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { struct in_addr netmask; struct in_addr gateway; unsigned prefixlen; - struct in_addr *nameservers; - size_t nameservers_size; int r; assert(client); @@ -669,37 +883,41 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { prefixlen = net_netmask_to_prefixlen(&netmask); r = sd_dhcp_lease_get_router(lease, &gateway); - if (r < 0) { - log_warning_link(link, "DHCP error: no router: %s", - strerror(-r)); + if (r < 0 && r != -ENOENT) { + log_warning_link(link, "DHCP error: %s", strerror(-r)); return r; } - log_struct_link(LOG_INFO, link, - "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", - link->ifname, - ADDRESS_FMT_VAL(address), - prefixlen, - ADDRESS_FMT_VAL(gateway), - "ADDRESS=%u.%u.%u.%u", - ADDRESS_FMT_VAL(address), - "PREFIXLEN=%u", - prefixlen, - "GATEWAY=%u.%u.%u.%u", - ADDRESS_FMT_VAL(gateway), - NULL); + if (r >= 0) + log_struct_link(LOG_INFO, link, + "MESSAGE=%*s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u", + IFNAMSIZ, + link->ifname, + ADDRESS_FMT_VAL(address), + prefixlen, + ADDRESS_FMT_VAL(gateway), + "ADDRESS=%u.%u.%u.%u", + ADDRESS_FMT_VAL(address), + "PREFIXLEN=%u", + prefixlen, + "GATEWAY=%u.%u.%u.%u", + ADDRESS_FMT_VAL(gateway), + NULL); + else + log_struct_link(LOG_INFO, link, + "MESSAGE=%*s: DHCPv4 address %u.%u.%u.%u/%u", + IFNAMSIZ, + link->ifname, + ADDRESS_FMT_VAL(address), + prefixlen, + "ADDRESS=%u.%u.%u.%u", + ADDRESS_FMT_VAL(address), + "PREFIXLEN=%u", + prefixlen, + NULL); link->dhcp_lease = lease; - if (link->network->dhcp_dns) { - r = sd_dhcp_lease_get_dns(lease, &nameservers, &nameservers_size); - if (r >= 0) { - r = manager_update_resolv_conf(link->manager); - if (r < 0) - log_error("Failed to update resolv.conf"); - } - } - if (link->network->dhcp_mtu) { uint16_t mtu; @@ -717,9 +935,9 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { r = sd_dhcp_lease_get_hostname(lease, &hostname); if (r >= 0) { - r = set_hostname(link->manager->bus, hostname); + r = link_set_hostname(link, hostname); if (r < 0) - log_error("Failed to set transient hostname " + log_error_link(link, "Failed to set transient hostname " "to '%s'", hostname); } } @@ -731,13 +949,13 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) { static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { Link *link = userdata; - int r; + int r = 0; assert(link); assert(link->network); assert(link->manager); - if (link->state == LINK_STATE_FAILED) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) return; switch (event) { @@ -770,7 +988,10 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { } if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) { - r = sd_ipv4ll_start (link->ipv4ll); + if (!sd_ipv4ll_is_running(link->ipv4ll)) + r = sd_ipv4ll_start(link->ipv4ll); + else if (ipv4ll_is_bound(link->ipv4ll)) + r = ipv4ll_address_update(link, false); if (r < 0) { link_enter_failed(link); return; @@ -785,7 +1006,10 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { return; } if (link->ipv4ll) { - r = sd_ipv4ll_stop(link->ipv4ll); + if (ipv4ll_is_bound(link->ipv4ll)) + r = ipv4ll_address_update(link, true); + else + r = sd_ipv4ll_stop(link->ipv4ll); if (r < 0) { link_enter_failed(link); return; @@ -803,11 +1027,45 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) { return; } -static int ipv4ll_address_lost(sd_ipv4ll *ll, Link *link) { +static int ipv4ll_address_update(Link *link, bool deprecate) { + int r; + struct in_addr addr; + + assert(link); + + r = sd_ipv4ll_get_address(link->ipv4ll, &addr); + if (r >= 0) { + _cleanup_address_free_ Address *address = NULL; + + log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u", + deprecate ? "deprecate" : "approve", + ADDRESS_FMT_VAL(addr)); + + r = address_new_dynamic(&address); + if (r < 0) { + log_error_link(link, "Could not allocate address: %s", strerror(-r)); + return r; + } + + address->family = AF_INET; + address->in_addr.in = addr; + address->prefixlen = 16; + address->scope = RT_SCOPE_LINK; + address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME; + address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen); + + address_update(address, link, &address_update_handler); + link_ref(link); + } + + return 0; + +} + +static int ipv4ll_address_lost(Link *link) { int r; struct in_addr addr; - assert(ll); assert(link); r = sd_ipv4ll_get_address(link->ipv4ll, &addr); @@ -830,6 +1088,7 @@ static int ipv4ll_address_lost(sd_ipv4ll *ll, Link *link) { address->scope = RT_SCOPE_LINK; address_drop(address, link, &address_drop_handler); + link_ref(link); r = route_new_dynamic(&route); if (r < 0) { @@ -843,11 +1102,24 @@ static int ipv4ll_address_lost(sd_ipv4ll *ll, Link *link) { route->metrics = 99; route_drop(route, link, &route_drop_handler); + link_ref(link); } return 0; } +static bool ipv4ll_is_bound(sd_ipv4ll *ll) { + int r; + struct in_addr addr; + + assert(ll); + + r = sd_ipv4ll_get_address(ll, &addr); + if (r < 0) + return false; + return true; +} + static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) { struct in_addr address; int r; @@ -860,7 +1132,8 @@ static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) { return r; log_struct_link(LOG_INFO, link, - "MESSAGE=%s: IPv4 link-local address %u.%u.%u.%u", + "MESSAGE=%*s: IPv4 link-local address %u.%u.%u.%u", + IFNAMSIZ, link->ifname, ADDRESS_FMT_VAL(address), NULL); @@ -878,10 +1151,13 @@ static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){ assert(link->network); assert(link->manager); + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) + return; + switch(event) { case IPV4LL_EVENT_STOP: case IPV4LL_EVENT_CONFLICT: - r = ipv4ll_address_lost(ll, link); + r = ipv4ll_address_lost(link); if (r < 0) { link_enter_failed(link); return; @@ -917,8 +1193,11 @@ static int link_acquire_conf(Link *link) { log_debug_link(link, "acquiring IPv4 link-local address"); r = sd_ipv4ll_start(link->ipv4ll); - if (r < 0) + if (r < 0) { + log_warning_link(link, "could not acquire IPv4 " + "link-local address"); return r; + } } if (link->network->dhcp) { @@ -927,68 +1206,132 @@ static int link_acquire_conf(Link *link) { log_debug_link(link, "acquiring DHCPv4 lease"); r = sd_dhcp_client_start(link->dhcp_client); - if (r < 0) + if (r < 0) { + log_warning_link(link, "could not acquire DHCPv4 " + "lease"); return r; + } } return 0; } -static int link_update_flags(Link *link, unsigned flags) { +bool link_has_carrier(unsigned flags, uint8_t operstate) { + /* see Documentation/networking/operstates.txt in the kernel sources */ + + if (operstate == IF_OPER_UP) + return true; + + if (operstate == IF_OPER_UNKNOWN) + /* operstate may not be implemented, so fall back to flags */ + if ((flags & IFF_LOWER_UP) && !(flags & IFF_DORMANT)) + return true; + + return false; +} + +#define FLAG_STRING(string, flag, old, new) \ + (((old ^ new) & flag) \ + ? ((old & flag) ? (" -" string) : (" +" string)) \ + : "") + +static int link_update_flags(Link *link, sd_rtnl_message *m) { + unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags; + uint8_t operstate; + bool carrier_gained = false, carrier_lost = false; int r; assert(link); - assert(link->network); - if (link->state == LINK_STATE_FAILED) - return 0; + r = sd_rtnl_message_link_get_flags(m, &flags); + if (r < 0) { + log_warning_link(link, "Could not get link flags"); + return r; + } + + r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate); + if (r < 0) + /* if we got a message without operstate, take it to mean + the state was unchanged */ + operstate = link->operstate; - if (link->flags == flags) + if ((link->flags == flags) && (link->operstate == operstate)) return 0; - log_debug_link(link, "link status updated: %#.8x -> %#.8x", - link->flags, flags); + if (link->flags != flags) { + log_debug_link(link, "flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", + FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags), + FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags), + FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags), + FLAG_STRING("UP", IFF_UP, link->flags, flags), + FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags), + FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags), + FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags), + FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags), + FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags), + FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags), + FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags), + FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags), + FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags), + FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags), + FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags), + FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags), + FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags), + FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags), + FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags)); + + unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP | + IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING | + IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT | + IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL | + IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP | + IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO); + unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags); + unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags); + + /* link flags are currently at most 18 bits, let's align to printing 20 */ + if (unknown_flags_added) + log_debug_link(link, "unknown link flags gained: %#.5x (ignoring)", + unknown_flags_added); + + if (unknown_flags_removed) + log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)", + unknown_flags_removed); + } - if ((link->flags & IFF_UP) != (flags & IFF_UP)) - log_info_link(link, - "link is %s", flags & IFF_UP ? "up": "down"); + carrier_gained = !link_has_carrier(link->flags, link->operstate) && + link_has_carrier(flags, operstate); + carrier_lost = link_has_carrier(link->flags, link->operstate) && + !link_has_carrier(flags, operstate); - if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) { - if (flags & IFF_LOWER_UP) { - log_info_link(link, "carrier on"); + link->flags = flags; + link->operstate = operstate; - if (link->network->dhcp || link->network->ipv4ll) { - r = link_acquire_conf(link); - if (r < 0) { - log_warning_link(link, "Could not acquire configuration: %s", strerror(-r)); - link_enter_failed(link); - return r; - } - } - } else { - log_info_link(link, "carrier off"); + link_save(link); - if (link->network->dhcp) { - r = sd_dhcp_client_stop(link->dhcp_client); - if (r < 0) { - log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r)); - link_enter_failed(link); - return r; - } - } + if (link->state == LINK_STATE_FAILED || + link->state == LINK_STATE_UNMANAGED) + return 0; - if (link->network->ipv4ll) { - r = sd_ipv4ll_stop(link->ipv4ll); - if (r < 0) { - log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r)); - link_enter_failed(link); - return r; - } + if (carrier_gained) { + log_info_link(link, "gained carrier"); + + if (link->network) { + r = link_acquire_conf(link); + if (r < 0) { + link_enter_failed(link); + return r; } } - } + } else if (carrier_lost) { + log_info_link(link, "lost carrier"); - link->flags = flags; + r = link_stop_clients(link); + if (r < 0) { + link_enter_failed(link); + return r; + } + } return 0; } @@ -999,18 +1342,25 @@ static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { assert(link); - if (link->state == LINK_STATE_FAILED) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); return 1; + } r = sd_rtnl_message_get_errno(m); - if (r >= 0) - link_update_flags(link, link->flags | IFF_UP); - else + if (r < 0) { + /* we warn but don't fail the link, as it may + be brought up later */ log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not bring up interface: %s", + "MESSAGE=%*s: could not bring up interface: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); + } + + link_unref(link); + return 1; } @@ -1044,6 +1394,8 @@ static int link_up(Link *link) { return r; } + link_ref(link); + return 0; } @@ -1054,10 +1406,12 @@ static int link_enslaved(Link *link) { assert(link->state == LINK_STATE_ENSLAVING); assert(link->network); - r = link_up(link); - if (r < 0) { - link_enter_failed(link); - return r; + if (!(link->flags & IFF_UP)) { + r = link_up(link); + if (r < 0) { + link_enter_failed(link); + return r; + } } if (!link->network->dhcp && !link->network->ipv4ll) @@ -1071,22 +1425,27 @@ static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { int r; assert(link); - assert(link->state == LINK_STATE_ENSLAVING || link->state == LINK_STATE_FAILED); + assert(IN_SET(link->state, LINK_STATE_ENSLAVING, LINK_STATE_FAILED, + LINK_STATE_LINGER)); assert(link->network); link->enslaving --; - if (link->state == LINK_STATE_FAILED) + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) { + link_unref(link); return 1; + } r = sd_rtnl_message_get_errno(m); if (r < 0) { log_struct_link(LOG_ERR, link, - "MESSAGE=%s: could not enslave: %s", + "MESSAGE=%*s: could not enslave: %s", + IFNAMSIZ, link->ifname, strerror(-r), "ERRNO=%d", -r, NULL); link_enter_failed(link); + link_unref(link); return 1; } @@ -1095,6 +1454,8 @@ static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { if (link->enslaving == 0) link_enslaved(link); + link_unref(link); + return 1; } @@ -1105,204 +1466,166 @@ static int link_enter_enslave(Link *link) { assert(link); assert(link->network); - assert(link->state == _LINK_STATE_INVALID); + assert(link->state == LINK_STATE_INITIALIZING); link->state = LINK_STATE_ENSLAVING; link_save(link); - if (!link->network->bridge && !link->network->bond && + if (!link->network->bridge && + !link->network->bond && + !link->network->tunnel && hashmap_isempty(link->network->vlans) && hashmap_isempty(link->network->macvlans)) return link_enslaved(link); + if (link->network->bond) { + log_struct_link(LOG_DEBUG, link, + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, link->network->bond->ifname, + NETDEV(link->network->bond), + NULL); + + r = netdev_enslave(link->network->bond, link, &enslave_handler); + if (r < 0) { + log_struct_link(LOG_WARNING, link, + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, link->network->bond->ifname, strerror(-r), + NETDEV(link->network->bond), + NULL); + link_enter_failed(link); + return r; + } + + link_ref(link); + link->enslaving ++; + } + if (link->network->bridge) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, link->network->bridge->name, + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, link->network->bridge->ifname, NETDEV(link->network->bridge), NULL); r = netdev_enslave(link->network->bridge, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, link->network->bridge->name, strerror(-r), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, link->network->bridge->ifname, strerror(-r), NETDEV(link->network->bridge), NULL); link_enter_failed(link); return r; } + link_ref(link); link->enslaving ++; } - if (link->network->bond) { + if (link->network->tunnel) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, link->network->bond->name, - NETDEV(link->network->bond), + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, link->network->tunnel->ifname, + NETDEV(link->network->tunnel), NULL); - r = netdev_enslave(link->network->bond, link, &enslave_handler); + r = netdev_enslave(link->network->tunnel, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, link->network->bond->name, strerror(-r), - NETDEV(link->network->bond), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, link->network->tunnel->ifname, strerror(-r), + NETDEV(link->network->tunnel), NULL); link_enter_failed(link); return r; } + link_ref(link); link->enslaving ++; } HASHMAP_FOREACH(vlan, link->network->vlans, i) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, vlan->name, NETDEV(vlan), NULL); + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, vlan->ifname, NETDEV(vlan), NULL); r = netdev_enslave(vlan, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, vlan->name, strerror(-r), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, vlan->ifname, strerror(-r), NETDEV(vlan), NULL); link_enter_failed(link); return r; } + link_ref(link); link->enslaving ++; } HASHMAP_FOREACH(macvlan, link->network->macvlans, i) { log_struct_link(LOG_DEBUG, link, - "MESSAGE=%s: enslaving by '%s'", - link->ifname, macvlan->name, NETDEV(macvlan), NULL); + "MESSAGE=%*s: enslaving by '%s'", + IFNAMSIZ, + link->ifname, macvlan->ifname, NETDEV(macvlan), NULL); r = netdev_enslave(macvlan, link, &enslave_handler); if (r < 0) { log_struct_link(LOG_WARNING, link, - "MESSAGE=%s: could not enslave by '%s': %s", - link->ifname, macvlan->name, strerror(-r), + "MESSAGE=%*s: could not enslave by '%s': %s", + IFNAMSIZ, + link->ifname, macvlan->ifname, strerror(-r), NETDEV(macvlan), NULL); link_enter_failed(link); return r; } + link_ref(link); link->enslaving ++; } return 0; } -static int link_getlink_handler(sd_rtnl *rtnl, sd_rtnl_message *m, - void *userdata) { - Link *link = userdata; - int r; - - assert(link); - - if (link->state == LINK_STATE_FAILED) - return 1; - - r = sd_rtnl_message_get_errno(m); - if (r < 0) { - log_struct_link(LOG_ERR, link, - "MESSAGE=%s: could not get state: %s", - link->ifname, strerror(-r), - "ERRNO=%d", -r, - NULL); - link_enter_failed(link); - return 1; - } - - link_update(link, m); - - return 1; -} - -static int link_getlink(Link *link) { - _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; - int r; - - assert(link); - assert(link->manager); - assert(link->manager->rtnl); - - log_debug_link(link, "requesting link status"); - - r = sd_rtnl_message_new_link(link->manager->rtnl, &req, - RTM_GETLINK, link->ifindex); - if (r < 0) { - log_error_link(link, "Could not allocate RTM_GETLINK message"); - return r; - } - - r = sd_rtnl_call_async(link->manager->rtnl, req, link_getlink_handler, - link, 0, NULL); - if (r < 0) { - log_error_link(link, - "Could not send rtnetlink message: %s", strerror(-r)); - return r; - } - - return 0; -} - static int link_configure(Link *link) { int r; assert(link); - assert(link->state == _LINK_STATE_INVALID); - - r = link_getlink(link); - if (r < 0) - return r; - - return link_enter_enslave(link); -} - -int link_add(Manager *m, struct udev_device *device, Link **ret) { - Link *link = NULL; - Network *network; - int r; - - assert(m); - assert(device); - - r = link_new(m, device, &link); - if (r < 0) - return r; - - *ret = link; - - r = network_get(m, device, &network); - if (r < 0) - return r == -ENOENT ? 0 : r; - - r = network_apply(m, network, link); - if (r < 0) - return r; + assert(link->state == LINK_STATE_INITIALIZING); if (link->network->ipv4ll) { uint8_t seed[8]; + r = sd_ipv4ll_new(&link->ipv4ll); if (r < 0) return r; - r = net_get_unique_predictable_data(link->udev_device, seed); - if (r >= 0) { - r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed); - if (r < 0) - return r; + if (link->udev_device) { + r = net_get_unique_predictable_data(link->udev_device, seed); + if (r >= 0) { + r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed); + if (r < 0) + return r; + } } r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0); if (r < 0) return r; + r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); + if (r < 0) + return r; + r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex); if (r < 0) return r; @@ -1321,6 +1644,10 @@ int link_add(Manager *m, struct udev_device *device, Link **ret) { if (r < 0) return r; + r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); + if (r < 0) + return r; + r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex); if (r < 0) return r; @@ -1336,6 +1663,42 @@ int link_add(Manager *m, struct udev_device *device, Link **ret) { } } + if (link_has_carrier(link->flags, link->operstate)) { + r = link_acquire_conf(link); + if (r < 0) + return r; + } + + return link_enter_enslave(link); +} + +int link_initialized(Link *link, struct udev_device *device) { + Network *network; + int r; + + assert(link); + assert(link->ifname); + assert(link->manager); + + if (link->state != LINK_STATE_INITIALIZING) + return 0; + + if (device) + link->udev_device = udev_device_ref(device); + + log_debug_link(link, "udev initialized link"); + + r = network_get(link->manager, device, link->ifname, &link->mac, &network); + if (r == -ENOENT) { + link_enter_unmanaged(link); + return 0; + } else if (r < 0) + return r; + + r = network_apply(link->manager, network, link); + if (r < 0) + return r; + r = link_configure(link); if (r < 0) return r; @@ -1343,77 +1706,313 @@ int link_add(Manager *m, struct udev_device *device, Link **ret) { return 0; } +int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) { + Manager *m = userdata; + Link *link = NULL; + uint16_t type; + _cleanup_address_free_ Address *address = NULL; + Address *ad; + char buf[INET6_ADDRSTRLEN]; + bool address_dropped = false; + int r, ifindex; + + assert(rtnl); + assert(message); + assert(m); + + r = sd_rtnl_message_get_type(message, &type); + if (r < 0) { + log_warning("rtnl: could not get message type"); + return 0; + } + + r = sd_rtnl_message_addr_get_ifindex(message, &ifindex); + if (r < 0 || ifindex <= 0) { + log_warning("rtnl: received address message without valid ifindex, ignoring"); + return 0; + } else { + r = link_get(m, ifindex, &link); + if (r < 0 || !link) { + log_warning("rtnl: received address for a nonexistent link, ignoring"); + return 0; + } + } + + r = address_new_dynamic(&address); + if (r < 0) + return 0; + + r = sd_rtnl_message_addr_get_family(message, &address->family); + if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) { + log_warning_link(link, "rtnl: received address with invalid family, ignoring"); + return 0; + } + + r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen); + if (r < 0) { + log_warning_link(link, "rtnl: recevied address with invalid prefixlen, ignoring"); + return 0; + } + + switch (address->family) { + case AF_INET: + r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in); + if (r < 0) { + log_warning_link(link, "rtnl: received address without valid address, ignoring"); + return 0; + } + + break; + + case AF_INET6: + r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6); + if (r < 0) { + log_warning_link(link, "rtnl: received address without valid address, ignoring"); + return 0; + } + + break; + + default: + assert_not_reached("invalid address family"); + } + + if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) { + log_warning_link(link, "could not print address"); + return 0; + } + + LIST_FOREACH(addresses, ad, link->addresses) { + if (address_equal(ad, address)) { + LIST_REMOVE(addresses, link->addresses, ad); + + address_free(ad); + + address_dropped = true; + + break; + } + } + + switch (type) { + case RTM_NEWADDR: + if (!address_dropped) + log_debug_link(link, "added address: %s/%u", buf, + address->prefixlen); + + LIST_PREPEND(addresses, link->addresses, address); + address = NULL; + + break; + case RTM_DELADDR: + if (address_dropped) + log_debug_link(link, "removed address: %s/%u", buf, + address->prefixlen); + + break; + default: + assert_not_reached("Received invalid RTNL message type"); + } + + return 1; +} + +static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) { + Link *link = userdata; + int r; + + assert(rtnl); + assert(m); + assert(link); + + for (; m; m = sd_rtnl_message_next(m)) { + r = sd_rtnl_message_get_errno(m); + if (r < 0) { + log_debug_link(link, "getting address failed: %s", strerror(-r)); + continue; + } + + r = link_rtnl_process_address(rtnl, m, link->manager); + if (r < 0) + log_warning_link(link, "could not process address: %s", strerror(-r)); + } + + return 1; +} + +int link_add(Manager *m, sd_rtnl_message *message, Link **ret) { + Link *link; + _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL; + _cleanup_udev_device_unref_ struct udev_device *device = NULL; + char ifindex_str[2 + DECIMAL_STR_MAX(int)]; + int r; + + assert(m); + assert(m->rtnl); + assert(message); + assert(ret); + + r = link_new(m, message, ret); + if (r < 0) + return r; + + link = *ret; + + log_debug_link(link, "link %"PRIu64" added", link->ifindex); + + r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, link->ifindex, 0); + if (r < 0) + return r; + + r = sd_rtnl_call_async(m->rtnl, req, link_get_address_handler, link, 0, NULL); + if (r < 0) + return r; + + if (detect_container(NULL) <= 0) { + /* not in a container, udev will be around */ + sprintf(ifindex_str, "n%"PRIu64, link->ifindex); + device = udev_device_new_from_device_id(m->udev, ifindex_str); + if (!device) { + log_warning_link(link, "could not find udev device"); + return -errno; + } + + if (udev_device_get_is_initialized(device) <= 0) { + /* not yet ready */ + log_debug_link(link, "udev initializing link..."); + return 0; + } + } + + r = link_initialized(link, device); + if (r < 0) + return r; + + return 0; +} + int link_update(Link *link, sd_rtnl_message *m) { - unsigned flags; struct ether_addr mac; + char *ifname; int r; assert(link); - assert(link->network); + assert(link->ifname); assert(m); - if (link->state == LINK_STATE_FAILED) - return 0; + if (link->state == LINK_STATE_LINGER) { + link_ref(link); + log_info_link(link, "link readded"); + link->state = LINK_STATE_ENSLAVING; + } + + r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname); + if (r >= 0 && !streq(ifname, link->ifname)) { + log_info_link(link, "renamed to %s", ifname); - if (link->network->dhcp && link->network->dhcp_mtu && - !link->original_mtu) { + free(link->ifname); + link->ifname = strdup(ifname); + if (!link->ifname) + return -ENOMEM; + } + + if (!link->original_mtu) { r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu); if (r >= 0) log_debug_link(link, "saved original MTU: %" PRIu16, link->original_mtu); } + /* The kernel may broadcast NEWLINK messages without the MAC address + set, simply ignore them. */ r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac); - if (r >= 0 && memcmp(&link->mac.ether_addr_octet, &mac.ether_addr_octet, ETH_ALEN)) { + if (r >= 0) { + if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) { - memcpy(&link->mac.ether_addr_octet, &mac.ether_addr_octet, ETH_ALEN); + memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN); - log_debug_link(link, "MAC address: " - "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", - mac.ether_addr_octet[0], - mac.ether_addr_octet[1], - mac.ether_addr_octet[2], - mac.ether_addr_octet[3], - mac.ether_addr_octet[4], - mac.ether_addr_octet[5]); + log_debug_link(link, "MAC address: " + "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", + mac.ether_addr_octet[0], + mac.ether_addr_octet[1], + mac.ether_addr_octet[2], + mac.ether_addr_octet[3], + mac.ether_addr_octet[4], + mac.ether_addr_octet[5]); - if (link->ipv4ll) { - r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); - if (r < 0) { - log_warning_link(link, "Could not update MAC " - "address in IPv4LL client: %s", - strerror(-r)); - return r; + if (link->ipv4ll) { + r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac); + if (r < 0) { + log_warning_link(link, "Could not update MAC " + "address in IPv4LL client: %s", + strerror(-r)); + return r; + } } - } - if (link->dhcp_client) { - r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); - if (r < 0) { - log_warning_link(link, "Could not update MAC " - "address in DHCP client: %s", - strerror(-r)); - return r; + if (link->dhcp_client) { + r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac); + if (r < 0) { + log_warning_link(link, "Could not update MAC " + "address in DHCP client: %s", + strerror(-r)); + return r; + } } } } - r = sd_rtnl_message_link_get_flags(m, &flags); - if (r < 0) { - log_warning_link(link, "Could not get link flags"); - return r; + return link_update_flags(link, m); +} + +static void serialize_addresses(FILE *f, const char *key, Address *address) { + Address *ad; + + assert(f); + assert(key); + + if (!address) + return; + + fprintf(f, "%s=", key); + + LIST_FOREACH(addresses, ad, address) { + char buf[INET6_ADDRSTRLEN]; + + if (inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) + fprintf(f, "%s%s", buf, (ad->addresses_next) ? " ": ""); } - return link_update_flags(link, flags); + fputs("\n", f); } int link_save(Link *link) { _cleanup_free_ char *temp_path = NULL; _cleanup_fclose_ FILE *f = NULL; + const char *admin_state, *oper_state = "unknown"; int r; assert(link); assert(link->state_file); + assert(link->lease_file); + assert(link->manager); + + r = manager_save(link->manager); + if (r < 0) + return r; + + if (link->state == LINK_STATE_LINGER) { + unlink(link->state_file); + return 0; + } + + admin_state = link_state_to_string(link->state); + assert(admin_state); + + if (link->operstate == IF_OPER_DORMANT) + oper_state = "dormant"; + else if (link_has_carrier(link->flags, link->operstate)) + oper_state = "carrier"; r = fopen_temporary(link->state_file, &f, &temp_path); if (r < 0) @@ -1423,23 +2022,25 @@ int link_save(Link *link) { fprintf(f, "# This is private data. Do not parse.\n" - "STATE=%s\n", - link_state_to_string(link->state)); + "ADMIN_STATE=%s\n" + "OPER_STATE=%s\n" + "FLAGS=%u\n", + admin_state, oper_state, link->flags); - if (link->dhcp_lease) { - char *lease_file; + if (link->network) + serialize_addresses(f, "DNS", link->network->dns); - r = asprintf(&lease_file, "/run/systemd/network/leases/%"PRIu64, - link->ifindex); - if (r < 0) - return -ENOMEM; - - r = dhcp_lease_save(link->dhcp_lease, lease_file); + if (link->dhcp_lease) { + r = dhcp_lease_save(link->dhcp_lease, link->lease_file); if (r < 0) goto finish; - fprintf(f, "DHCP_LEASE=%s\n", lease_file); - } + fprintf(f, + "DHCP_LEASE=%s\n" + "DHCP_USE_DNS=%s\n", + link->lease_file, yes_no(link->network->dhcp_dns)); + } else + unlink(link->lease_file); fflush(f); @@ -1451,17 +2052,20 @@ int link_save(Link *link) { finish: if (r < 0) - log_error("Failed to save link data %s: %s", link->state_file, strerror(-r)); + log_error_link(link, "Failed to save link data to %s: %s", link->state_file, strerror(-r)); return r; } static const char* const link_state_table[_LINK_STATE_MAX] = { + [LINK_STATE_INITIALIZING] = "initializing", [LINK_STATE_ENSLAVING] = "configuring", [LINK_STATE_SETTING_ADDRESSES] = "configuring", [LINK_STATE_SETTING_ROUTES] = "configuring", [LINK_STATE_CONFIGURED] = "configured", + [LINK_STATE_UNMANAGED] = "unmanaged", [LINK_STATE_FAILED] = "failed", + [LINK_STATE_LINGER] = "linger", }; DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);