/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include "sd-device.h" #include "sd-netlink.h" #include "alloc-util.h" #include "arphrd-util.h" #include "conf-files.h" #include "conf-parser.h" #include "constants.h" #include "creds-util.h" #include "device-private.h" #include "device-util.h" #include "env-util.h" #include "escape.h" #include "ethtool-util.h" #include "fd-util.h" #include "fileio.h" #include "link-config.h" #include "log-link.h" #include "memory-util.h" #include "net-condition.h" #include "netif-sriov.h" #include "netif-util.h" #include "netlink-util.h" #include "parse-util.h" #include "path-lookup.h" #include "path-util.h" #include "proc-cmdline.h" #include "random-util.h" #include "specifier.h" #include "stat-util.h" #include "string-table.h" #include "string-util.h" #include "strv.h" #include "udev-builtin.h" #include "utf8.h" static const Specifier link_specifier_table[] = { COMMON_SYSTEM_SPECIFIERS, COMMON_TMP_SPECIFIERS, {} }; struct LinkConfigContext { LIST_HEAD(LinkConfig, configs); int ethtool_fd; Hashmap *stats_by_path; }; static LinkConfig* link_config_free(LinkConfig *config) { if (!config) return NULL; free(config->filename); strv_free(config->dropins); net_match_clear(&config->match); condition_free_list(config->conditions); free(config->description); strv_free(config->properties); strv_free(config->import_properties); strv_free(config->unset_properties); free(config->name_policy); free(config->name); strv_free(config->alternative_names); free(config->alternative_names_policy); free(config->alias); free(config->wol_password_file); erase_and_free(config->wol_password); cpu_set_free(config->rps_cpu_mask); ordered_hashmap_free_with_destructor(config->sr_iov_by_section, sr_iov_free); return mfree(config); } DEFINE_TRIVIAL_CLEANUP_FUNC(LinkConfig*, link_config_free); static void link_configs_free(LinkConfigContext *ctx) { if (!ctx) return; ctx->stats_by_path = hashmap_free(ctx->stats_by_path); LIST_FOREACH(configs, config, ctx->configs) link_config_free(config); } LinkConfigContext *link_config_ctx_free(LinkConfigContext *ctx) { if (!ctx) return NULL; safe_close(ctx->ethtool_fd); link_configs_free(ctx); return mfree(ctx); } int link_config_ctx_new(LinkConfigContext **ret) { _cleanup_(link_config_ctx_freep) LinkConfigContext *ctx = NULL; if (!ret) return -EINVAL; ctx = new(LinkConfigContext, 1); if (!ctx) return -ENOMEM; *ctx = (LinkConfigContext) { .ethtool_fd = -EBADF, }; *ret = TAKE_PTR(ctx); return 0; } static int link_parse_wol_password(LinkConfig *config, const char *str) { _cleanup_(erase_and_freep) uint8_t *p = NULL; int r; assert(config); assert(str); assert_cc(sizeof(struct ether_addr) == SOPASS_MAX); p = new(uint8_t, SOPASS_MAX); if (!p) return -ENOMEM; /* Reuse parse_ether_addr(), as their formats are equivalent. */ r = parse_ether_addr(str, (struct ether_addr*) p); if (r < 0) return r; erase_and_free(config->wol_password); config->wol_password = TAKE_PTR(p); return 0; } static int link_read_wol_password_from_file(LinkConfig *config) { _cleanup_(erase_and_freep) char *password = NULL; int r; assert(config); if (!config->wol_password_file) return 0; r = read_full_file_full( AT_FDCWD, config->wol_password_file, UINT64_MAX, SIZE_MAX, READ_FULL_FILE_SECURE | READ_FULL_FILE_WARN_WORLD_READABLE | READ_FULL_FILE_CONNECT_SOCKET, NULL, &password, NULL); if (r < 0) return r; return link_parse_wol_password(config, password); } static int link_read_wol_password_from_cred(LinkConfig *config) { _cleanup_free_ char *base = NULL, *cred_name = NULL; _cleanup_(erase_and_freep) char *password = NULL; int r; assert(config); assert(config->filename); if (config->wol == UINT32_MAX) return 0; /* WakeOnLan= is not specified. */ if (!FLAGS_SET(config->wol, WAKE_MAGICSECURE)) return 0; /* secureon is not specified in WakeOnLan=. */ if (config->wol_password) return 0; /* WakeOnLanPassword= is specified. */ if (config->wol_password_file) return 0; /* a file name is specified in WakeOnLanPassword=, but failed to read it. */ r = path_extract_filename(config->filename, &base); if (r < 0) return r; cred_name = strjoin(base, ".wol.password"); if (!cred_name) return -ENOMEM; r = read_credential(cred_name, (void**) &password, NULL); if (r == -ENOENT) r = read_credential("wol.password", (void**) &password, NULL); if (r < 0) return r; return link_parse_wol_password(config, password); } static int link_adjust_wol_options(LinkConfig *config) { int r; assert(config); r = link_read_wol_password_from_file(config); if (r == -ENOMEM) return log_oom(); if (r < 0) log_warning_errno(r, "Failed to read WakeOnLan password from %s, ignoring: %m", config->wol_password_file); r = link_read_wol_password_from_cred(config); if (r == -ENOMEM) return log_oom(); if (r < 0) log_warning_errno(r, "Failed to read WakeOnLan password from credential, ignoring: %m"); if (config->wol != UINT32_MAX && config->wol_password) /* Enable WAKE_MAGICSECURE flag when WakeOnLanPassword=. Note that when * WakeOnLanPassword= is set without WakeOnLan=, then ethtool_set_wol() enables * WAKE_MAGICSECURE flag and other flags are not changed. */ config->wol |= WAKE_MAGICSECURE; return 0; } int link_load_one(LinkConfigContext *ctx, const char *filename) { _cleanup_(link_config_freep) LinkConfig *config = NULL; _cleanup_hashmap_free_ Hashmap *stats_by_path = NULL; _cleanup_free_ char *name = NULL; const char *dropin_dirname; size_t i; int r; assert(ctx); assert(filename); r = null_or_empty_path(filename); if (r < 0) return log_warning_errno(r, "Failed to check if \"%s\" is empty: %m", filename); if (r > 0) { log_debug("Skipping empty file: %s", filename); return 0; } name = strdup(filename); if (!name) return log_oom(); config = new(LinkConfig, 1); if (!config) return log_oom(); *config = (LinkConfig) { .filename = TAKE_PTR(name), .mac_address_policy = MAC_ADDRESS_POLICY_NONE, .wol = UINT32_MAX, /* UINT32_MAX means do not change WOL setting. */ .duplex = _DUP_INVALID, .port = _NET_DEV_PORT_INVALID, .autonegotiation = -1, .rx_flow_control = -1, .tx_flow_control = -1, .autoneg_flow_control = -1, .txqueuelen = UINT32_MAX, .coalesce.use_adaptive_rx_coalesce = -1, .coalesce.use_adaptive_tx_coalesce = -1, .mdi = ETH_TP_MDI_INVALID, .sr_iov_num_vfs = UINT32_MAX, }; for (i = 0; i < ELEMENTSOF(config->features); i++) config->features[i] = -1; dropin_dirname = strjoina(basename(filename), ".d"); r = config_parse_many( STRV_MAKE_CONST(filename), NETWORK_DIRS, dropin_dirname, /* root = */ NULL, "Match\0" "Link\0" "SR-IOV\0", config_item_perf_lookup, link_config_gperf_lookup, CONFIG_PARSE_WARN, config, &stats_by_path, &config->dropins); if (r < 0) return r; /* config_parse_many() logs internally. */ if (ctx->stats_by_path) { r = hashmap_move(ctx->stats_by_path, stats_by_path); if (r < 0) log_warning_errno(r, "Failed to save stats of '%s' and its drop-in configs, ignoring: %m", filename); } else ctx->stats_by_path = TAKE_PTR(stats_by_path); if (net_match_is_empty(&config->match) && !config->conditions) { log_warning("%s: No valid settings found in the [Match] section, ignoring file. " "To match all interfaces, add OriginalName=* in the [Match] section.", filename); return 0; } if (!condition_test_list(config->conditions, environ, NULL, NULL, NULL)) { log_debug("%s: Conditions do not match the system environment, skipping.", filename); return 0; } if (IN_SET(config->mac_address_policy, MAC_ADDRESS_POLICY_PERSISTENT, MAC_ADDRESS_POLICY_RANDOM) && config->hw_addr.length > 0) log_warning("%s: MACAddress= in [Link] section will be ignored when MACAddressPolicy= " "is set to \"persistent\" or \"random\".", filename); r = link_adjust_wol_options(config); if (r < 0) return r; /* link_adjust_wol_options() logs internally. */ r = sr_iov_drop_invalid_sections(config->sr_iov_num_vfs, config->sr_iov_by_section); if (r < 0) return r; /* sr_iov_drop_invalid_sections() logs internally. */ log_debug("Parsed configuration file \"%s\"", filename); LIST_PREPEND(configs, ctx->configs, TAKE_PTR(config)); return 0; } static int device_unsigned_attribute(sd_device *device, const char *attr, unsigned *type) { const char *s; int r; r = sd_device_get_sysattr_value(device, attr, &s); if (r < 0) return log_device_debug_errno(device, r, "Failed to query %s: %m", attr); r = safe_atou(s, type); if (r < 0) return log_device_warning_errno(device, r, "Failed to parse %s \"%s\": %m", attr, s); log_device_debug(device, "Device has %s=%u", attr, *type); return 0; } int link_config_load(LinkConfigContext *ctx) { _cleanup_strv_free_ char **files = NULL; int r; assert(ctx); link_configs_free(ctx); r = conf_files_list_strv(&files, ".link", NULL, 0, NETWORK_DIRS); if (r < 0) return log_error_errno(r, "failed to enumerate link files: %m"); STRV_FOREACH_BACKWARDS(f, files) (void) link_load_one(ctx, *f); return 0; } bool link_config_should_reload(LinkConfigContext *ctx) { _cleanup_hashmap_free_ Hashmap *stats_by_path = NULL; int r; assert(ctx); r = config_get_stats_by_path(".link", NULL, 0, NETWORK_DIRS, /* check_dropins = */ true, &stats_by_path); if (r < 0) { log_warning_errno(r, "Failed to get stats of .link files, ignoring: %m"); return true; } return !stats_by_path_equal(ctx->stats_by_path, stats_by_path); } Link *link_free(Link *link) { if (!link) return NULL; sd_device_unref(link->device); sd_device_unref(link->device_db_clone); free(link->kind); strv_free(link->altnames); return mfree(link); } int link_new(LinkConfigContext *ctx, sd_netlink **rtnl, sd_device *device, sd_device *device_db_clone, Link **ret) { _cleanup_(link_freep) Link *link = NULL; int r; assert(ctx); assert(rtnl); assert(device); assert(device_db_clone); assert(ret); link = new(Link, 1); if (!link) return -ENOMEM; *link = (Link) { .device = sd_device_ref(device), .device_db_clone = sd_device_ref(device_db_clone), }; r = sd_device_get_sysname(device, &link->ifname); if (r < 0) return r; r = sd_device_get_ifindex(device, &link->ifindex); if (r < 0) return r; r = sd_device_get_action(device, &link->action); if (r < 0) return r; r = device_unsigned_attribute(device, "name_assign_type", &link->name_assign_type); if (r < 0) log_link_debug_errno(link, r, "Failed to get \"name_assign_type\" attribute, ignoring: %m"); r = device_unsigned_attribute(device, "addr_assign_type", &link->addr_assign_type); if (r < 0) log_link_debug_errno(link, r, "Failed to get \"addr_assign_type\" attribute, ignoring: %m"); r = rtnl_get_link_info(rtnl, link->ifindex, &link->iftype, &link->flags, &link->kind, &link->hw_addr, &link->permanent_hw_addr); if (r < 0) return r; if (link->hw_addr.length > 0 && link->permanent_hw_addr.length == 0) { r = ethtool_get_permanent_hw_addr(&ctx->ethtool_fd, link->ifname, &link->permanent_hw_addr); if (r < 0) log_link_debug_errno(link, r, "Failed to get permanent hardware address, ignoring: %m"); } r = sd_device_get_property_value(link->device, "ID_NET_DRIVER", &link->driver); if (r < 0 && r != -ENOENT) log_link_debug_errno(link, r, "Failed to get driver, ignoring: %m"); *ret = TAKE_PTR(link); return 0; } int link_get_config(LinkConfigContext *ctx, Link *link) { int r; assert(ctx); assert(link); /* Do not configure loopback interfaces by .link files. */ if (link->flags & IFF_LOOPBACK) return -ENOENT; LIST_FOREACH(configs, config, ctx->configs) { r = net_match_config( &config->match, link->device, &link->hw_addr, &link->permanent_hw_addr, link->driver, link->iftype, link->kind, link->ifname, /* alternative_names = */ NULL, /* wlan_iftype = */ 0, /* ssid = */ NULL, /* bssid = */ NULL); if (r < 0) return r; if (r == 0) continue; if (config->match.ifname && !strv_contains(config->match.ifname, "*") && link->name_assign_type == NET_NAME_ENUM) log_link_warning(link, "Config file %s is applied to device based on potentially unpredictable interface name.", config->filename); else log_link_debug(link, "Config file %s is applied", config->filename); link->config = config; return 0; } return -ENOENT; } static int link_apply_ethtool_settings(Link *link, int *ethtool_fd, EventMode mode) { LinkConfig *config; const char *name; int r; assert(link); assert(link->config); assert(ethtool_fd); if (mode != EVENT_UDEV_WORKER) { log_link_debug(link, "Running in test mode, skipping application of ethtool settings."); return 0; } config = link->config; name = link->ifname; r = ethtool_set_glinksettings(ethtool_fd, name, config->autonegotiation, config->advertise, config->speed, config->duplex, config->port, config->mdi); if (r < 0) { if (config->autonegotiation >= 0) log_link_warning_errno(link, r, "Could not %s auto negotiation, ignoring: %m", enable_disable(config->autonegotiation)); if (!eqzero(config->advertise)) log_link_warning_errno(link, r, "Could not set advertise mode, ignoring: %m"); if (config->speed > 0) log_link_warning_errno(link, r, "Could not set speed to %"PRIu64"Mbps, ignoring: %m", DIV_ROUND_UP(config->speed, 1000000)); if (config->duplex >= 0) log_link_warning_errno(link, r, "Could not set duplex to %s, ignoring: %m", duplex_to_string(config->duplex)); if (config->port >= 0) log_link_warning_errno(link, r, "Could not set port to '%s', ignoring: %m", port_to_string(config->port)); if (config->mdi != ETH_TP_MDI_INVALID) log_link_warning_errno(link, r, "Could not set MDI-X to '%s', ignoring: %m", mdi_to_string(config->mdi)); } r = ethtool_set_wol(ethtool_fd, name, config->wol, config->wol_password); if (r < 0) { _cleanup_free_ char *str = NULL; (void) wol_options_to_string_alloc(config->wol, &str); log_link_warning_errno(link, r, "Could not set WakeOnLan%s%s, ignoring: %m", isempty(str) ? "" : " to ", strempty(str)); } r = ethtool_set_features(ethtool_fd, name, config->features); if (r < 0) log_link_warning_errno(link, r, "Could not set offload features, ignoring: %m"); r = ethtool_set_channels(ethtool_fd, name, &config->channels); if (r < 0) log_link_warning_errno(link, r, "Could not set channels, ignoring: %m"); r = ethtool_set_nic_buffer_size(ethtool_fd, name, &config->ring); if (r < 0) log_link_warning_errno(link, r, "Could not set ring buffer, ignoring: %m"); r = ethtool_set_flow_control(ethtool_fd, name, config->rx_flow_control, config->tx_flow_control, config->autoneg_flow_control); if (r < 0) log_link_warning_errno(link, r, "Could not set flow control, ignoring: %m"); r = ethtool_set_nic_coalesce_settings(ethtool_fd, name, &config->coalesce); if (r < 0) log_link_warning_errno(link, r, "Could not set coalesce settings, ignoring: %m"); return 0; } static bool hw_addr_is_valid(Link *link, const struct hw_addr_data *hw_addr) { assert(link); assert(hw_addr); switch (link->iftype) { case ARPHRD_ETHER: /* Refuse all zero and all 0xFF. */ assert(hw_addr->length == ETH_ALEN); return !ether_addr_is_null(&hw_addr->ether) && !ether_addr_is_broadcast(&hw_addr->ether); case ARPHRD_INFINIBAND: /* The last 8 bytes cannot be zero. */ assert(hw_addr->length == INFINIBAND_ALEN); return !memeqzero(hw_addr->bytes + INFINIBAND_ALEN - 8, 8); default: assert_not_reached(); } } static int link_generate_new_hw_addr(Link *link, struct hw_addr_data *ret) { struct hw_addr_data hw_addr = HW_ADDR_NULL; bool is_static = false; uint8_t *p; size_t len; int r; assert(link); assert(link->config); assert(link->device); assert(ret); if (link->hw_addr.length == 0) goto finalize; if (link->config->mac_address_policy == MAC_ADDRESS_POLICY_NONE) { log_link_debug(link, "Using static MAC address."); hw_addr = link->config->hw_addr; is_static = true; goto finalize; } if (!IN_SET(link->iftype, ARPHRD_ETHER, ARPHRD_INFINIBAND)) goto finalize; switch (link->addr_assign_type) { case NET_ADDR_SET: log_link_debug(link, "MAC address on the device already set by userspace."); goto finalize; case NET_ADDR_STOLEN: log_link_debug(link, "MAC address on the device already set based on another device."); goto finalize; case NET_ADDR_RANDOM: case NET_ADDR_PERM: break; default: log_link_warning(link, "Unknown addr_assign_type %u, ignoring", link->addr_assign_type); goto finalize; } if ((link->config->mac_address_policy == MAC_ADDRESS_POLICY_RANDOM) == (link->addr_assign_type == NET_ADDR_RANDOM)) { log_link_debug(link, "MAC address on the device already matches policy \"%s\".", mac_address_policy_to_string(link->config->mac_address_policy)); goto finalize; } hw_addr = (struct hw_addr_data) { .length = arphrd_to_hw_addr_len(link->iftype), }; switch (link->iftype) { case ARPHRD_ETHER: p = hw_addr.bytes; len = hw_addr.length; break; case ARPHRD_INFINIBAND: p = hw_addr.bytes + INFINIBAND_ALEN - 8; len = 8; break; default: assert_not_reached(); } if (link->config->mac_address_policy == MAC_ADDRESS_POLICY_RANDOM) /* We require genuine randomness here, since we want to make sure we won't collide with other * systems booting up at the very same time. */ for (;;) { random_bytes(p, len); if (hw_addr_is_valid(link, &hw_addr)) break; } else { uint64_t result; r = net_get_unique_predictable_data(link->device, naming_scheme_has(NAMING_STABLE_VIRTUAL_MACS), &result); if (r < 0) return log_link_warning_errno(link, r, "Could not generate persistent MAC address: %m"); assert(len <= sizeof(result)); memcpy(p, &result, len); if (!hw_addr_is_valid(link, &hw_addr)) return log_link_warning_errno(link, SYNTHETIC_ERRNO(EINVAL), "Could not generate valid persistent MAC address: %m"); } finalize: r = net_verify_hardware_address(link->ifname, is_static, link->iftype, &link->hw_addr, &hw_addr); if (r < 0) return r; if (hw_addr_equal(&link->hw_addr, &hw_addr)) { *ret = HW_ADDR_NULL; return 0; } if (hw_addr.length > 0) log_link_debug(link, "Applying %s MAC address: %s", link->config->mac_address_policy == MAC_ADDRESS_POLICY_NONE ? "static" : mac_address_policy_to_string(link->config->mac_address_policy), HW_ADDR_TO_STR(&hw_addr)); *ret = hw_addr; return 0; } static int link_apply_rtnl_settings(Link *link, sd_netlink **rtnl, EventMode mode) { struct hw_addr_data hw_addr = {}; LinkConfig *config; int r; assert(link); assert(link->config); assert(rtnl); if (mode != EVENT_UDEV_WORKER) { log_link_debug(link, "Running in test mode, skipping application of rtnl settings."); return 0; } config = link->config; (void) link_generate_new_hw_addr(link, &hw_addr); r = rtnl_set_link_properties(rtnl, link->ifindex, config->alias, &hw_addr, config->txqueues, config->rxqueues, config->txqueuelen, config->mtu, config->gso_max_size, config->gso_max_segments); if (r < 0) log_link_warning_errno(link, r, "Could not set Alias=, MACAddress=/MACAddressPolicy=, " "TransmitQueues=, ReceiveQueues=, TransmitQueueLength=, MTUBytes=, " "GenericSegmentOffloadMaxBytes= or GenericSegmentOffloadMaxSegments=, " "ignoring: %m"); return 0; } static bool enable_name_policy(void) { static int cached = -1; bool b; int r; if (cached >= 0) return cached; r = proc_cmdline_get_bool("net.ifnames", /* flags = */ 0, &b); if (r < 0) log_warning_errno(r, "Failed to parse net.ifnames= kernel command line option, ignoring: %m"); if (r <= 0) return (cached = true); if (!b) log_info("Network interface NamePolicy= disabled on kernel command line."); return (cached = b); } static int link_generate_new_name(Link *link) { LinkConfig *config; sd_device *device; assert(link); assert(link->config); assert(link->device); config = link->config; device = link->device; if (link->action != SD_DEVICE_ADD) { log_link_debug(link, "Not applying Name= and NamePolicy= on '%s' uevent.", device_action_to_string(link->action)); goto no_rename; } if (IN_SET(link->name_assign_type, NET_NAME_USER, NET_NAME_RENAMED) && !naming_scheme_has(NAMING_ALLOW_RERENAMES)) { log_link_debug(link, "Device already has a name given by userspace, not renaming."); goto no_rename; } if (enable_name_policy() && config->name_policy) for (NamePolicy *policy = config->name_policy; *policy != _NAMEPOLICY_INVALID; policy++) { const char *new_name = NULL; switch (*policy) { case NAMEPOLICY_KERNEL: if (link->name_assign_type != NET_NAME_PREDICTABLE) continue; /* The kernel claims to have given a predictable name, keep it. */ log_link_debug(link, "Policy *%s*: keeping predictable kernel name", name_policy_to_string(*policy)); goto no_rename; case NAMEPOLICY_KEEP: if (!IN_SET(link->name_assign_type, NET_NAME_USER, NET_NAME_RENAMED)) continue; log_link_debug(link, "Policy *%s*: keeping existing userspace name", name_policy_to_string(*policy)); goto no_rename; case NAMEPOLICY_DATABASE: (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &new_name); break; case NAMEPOLICY_ONBOARD: (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &new_name); break; case NAMEPOLICY_SLOT: (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &new_name); break; case NAMEPOLICY_PATH: (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &new_name); break; case NAMEPOLICY_MAC: (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &new_name); break; default: assert_not_reached(); } if (ifname_valid(new_name)) { log_link_debug(link, "Policy *%s* yields \"%s\".", name_policy_to_string(*policy), new_name); link->new_name = new_name; return 0; } } if (link->config->name) { log_link_debug(link, "Policies didn't yield a name, using specified Name=%s.", link->config->name); link->new_name = link->config->name; return 0; } log_link_debug(link, "Policies didn't yield a name and Name= is not given, not renaming."); no_rename: link->new_name = link->ifname; return 0; } static int link_generate_alternative_names(Link *link) { _cleanup_strv_free_ char **altnames = NULL; LinkConfig *config; sd_device *device; int r; assert(link); config = ASSERT_PTR(link->config); device = ASSERT_PTR(link->device); assert(!link->altnames); if (link->action != SD_DEVICE_ADD) { log_link_debug(link, "Not applying AlternativeNames= and AlternativeNamesPolicy= on '%s' uevent.", device_action_to_string(link->action)); return 0; } if (config->alternative_names) { altnames = strv_copy(config->alternative_names); if (!altnames) return log_oom(); } if (config->alternative_names_policy) for (NamePolicy *p = config->alternative_names_policy; *p != _NAMEPOLICY_INVALID; p++) { const char *n = NULL; switch (*p) { case NAMEPOLICY_DATABASE: (void) sd_device_get_property_value(device, "ID_NET_NAME_FROM_DATABASE", &n); break; case NAMEPOLICY_ONBOARD: (void) sd_device_get_property_value(device, "ID_NET_NAME_ONBOARD", &n); break; case NAMEPOLICY_SLOT: (void) sd_device_get_property_value(device, "ID_NET_NAME_SLOT", &n); break; case NAMEPOLICY_PATH: (void) sd_device_get_property_value(device, "ID_NET_NAME_PATH", &n); break; case NAMEPOLICY_MAC: (void) sd_device_get_property_value(device, "ID_NET_NAME_MAC", &n); break; default: assert_not_reached(); } if (ifname_valid_full(n, IFNAME_VALID_ALTERNATIVE)) { r = strv_extend(&altnames, n); if (r < 0) return log_oom(); } } link->altnames = TAKE_PTR(altnames); return 0; } static int sr_iov_configure(Link *link, sd_netlink **rtnl, SRIOV *sr_iov) { _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; int r; assert(link); assert(rtnl); assert(link->ifindex > 0); if (!*rtnl) { r = sd_netlink_open(rtnl); if (r < 0) return r; } r = sd_rtnl_message_new_link(*rtnl, &req, RTM_SETLINK, link->ifindex); if (r < 0) return r; r = sr_iov_set_netlink_message(sr_iov, req); if (r < 0) return r; r = sd_netlink_call(*rtnl, req, 0, NULL); if (r < 0) return r; return 0; } static int link_apply_sr_iov_config(Link *link, sd_netlink **rtnl, EventMode mode) { SRIOV *sr_iov; uint32_t n; int r; assert(link); assert(link->config); assert(link->device); if (mode != EVENT_UDEV_WORKER) { log_link_debug(link, "Running in test mode, skipping application of SR-IOV settings."); return 0; } r = sr_iov_set_num_vfs(link->device, link->config->sr_iov_num_vfs, link->config->sr_iov_by_section); if (r < 0) log_link_warning_errno(link, r, "Failed to set the number of SR-IOV virtual functions, ignoring: %m"); if (ordered_hashmap_isempty(link->config->sr_iov_by_section)) return 0; r = sr_iov_get_num_vfs(link->device, &n); if (r < 0) { log_link_warning_errno(link, r, "Failed to get the number of SR-IOV virtual functions, ignoring [SR-IOV] sections: %m"); return 0; } if (n == 0) { log_link_warning(link, "No SR-IOV virtual function exists, ignoring [SR-IOV] sections: %m"); return 0; } ORDERED_HASHMAP_FOREACH(sr_iov, link->config->sr_iov_by_section) { if (sr_iov->vf >= n) { log_link_warning(link, "SR-IOV virtual function %"PRIu32" does not exist, ignoring.", sr_iov->vf); continue; } r = sr_iov_configure(link, rtnl, sr_iov); if (r < 0) log_link_warning_errno(link, r, "Failed to configure SR-IOV virtual function %"PRIu32", ignoring: %m", sr_iov->vf); } return 0; } static int link_apply_rps_cpu_mask(Link *link, EventMode mode) { _cleanup_free_ char *mask_str = NULL; LinkConfig *config; int r; assert(link); config = ASSERT_PTR(link->config); if (mode != EVENT_UDEV_WORKER) { log_link_debug(link, "Running in test mode, skipping application of RPS setting."); return 0; } /* Skip if the config is not specified. */ if (!config->rps_cpu_mask) return 0; mask_str = cpu_set_to_mask_string(config->rps_cpu_mask); if (!mask_str) return log_oom(); log_link_debug(link, "Applying RPS CPU mask: %s", mask_str); /* Currently, this will set CPU mask to all rx queue of matched device. */ FOREACH_DEVICE_SYSATTR(link->device, attr) { const char *c; c = path_startswith(attr, "queues/"); if (!c) continue; c = startswith(c, "rx-"); if (!c) continue; c += strcspn(c, "/"); if (!path_equal(c, "/rps_cpus")) continue; r = sd_device_set_sysattr_value(link->device, attr, mask_str); if (r < 0) log_link_warning_errno(link, r, "Failed to write %s sysfs attribute, ignoring: %m", attr); } return 0; } static int link_apply_udev_properties(Link *link, EventMode mode) { LinkConfig *config; sd_device *device; assert(link); config = ASSERT_PTR(link->config); device = ASSERT_PTR(link->device); /* 1. apply ImportProperty=. */ STRV_FOREACH(p, config->import_properties) (void) udev_builtin_import_property(device, link->device_db_clone, mode, *p); /* 2. apply Property=. */ STRV_FOREACH(p, config->properties) { _cleanup_free_ char *key = NULL; const char *eq; eq = strchr(*p, '='); if (!eq) continue; key = strndup(*p, eq - *p); if (!key) return log_oom(); (void) udev_builtin_add_property(device, mode, key, eq + 1); } /* 3. apply UnsetProperty=. */ STRV_FOREACH(p, config->unset_properties) (void) udev_builtin_add_property(device, mode, *p, NULL); /* 4. set the default properties. */ (void) udev_builtin_add_property(device, mode, "ID_NET_LINK_FILE", config->filename); _cleanup_free_ char *joined = NULL; STRV_FOREACH(d, config->dropins) { _cleanup_free_ char *escaped = NULL; escaped = xescape(*d, ":"); if (!escaped) return log_oom(); if (!strextend_with_separator(&joined, ":", escaped)) return log_oom(); } (void) udev_builtin_add_property(device, mode, "ID_NET_LINK_FILE_DROPINS", joined); if (link->new_name) (void) udev_builtin_add_property(device, mode, "ID_NET_NAME", link->new_name); return 0; } int link_apply_config(LinkConfigContext *ctx, sd_netlink **rtnl, Link *link, EventMode mode) { int r; assert(ctx); assert(rtnl); assert(link); r = link_apply_ethtool_settings(link, &ctx->ethtool_fd, mode); if (r < 0) return r; r = link_apply_rtnl_settings(link, rtnl, mode); if (r < 0) return r; r = link_generate_new_name(link); if (r < 0) return r; r = link_generate_alternative_names(link); if (r < 0) return r; r = link_apply_sr_iov_config(link, rtnl, mode); if (r < 0) return r; r = link_apply_rps_cpu_mask(link, mode); if (r < 0) return r; return link_apply_udev_properties(link, mode); } int config_parse_udev_property( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { char ***properties = ASSERT_PTR(data); int r; assert(filename); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { /* Empty assignment resets the list */ *properties = strv_free(*properties); return 0; } for (const char *p = rvalue;; ) { _cleanup_free_ char *word = NULL, *resolved = NULL, *key = NULL; const char *eq; r = extract_first_word(&p, &word, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring assignment: %s", rvalue); return 0; } if (r == 0) return 0; r = specifier_printf(word, SIZE_MAX, link_specifier_table, NULL, NULL, &resolved); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to resolve specifiers in %s, ignoring assignment: %m", word); continue; } /* The restriction for udev property is not clear. Let's apply the one for environment variable here. */ if (!env_assignment_is_valid(resolved)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid udev property, ignoring assignment: %s", word); continue; } assert_se(eq = strchr(resolved, '=')); key = strndup(resolved, eq - resolved); if (!key) return log_oom(); if (!device_property_can_set(key)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid udev property name '%s', ignoring assignment: %s", key, resolved); continue; } r = strv_env_replace_consume(properties, TAKE_PTR(resolved)); if (r < 0) return log_error_errno(r, "Failed to update properties: %m"); } } int config_parse_udev_property_name( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { char ***properties = ASSERT_PTR(data); int r; assert(filename); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { /* Empty assignment resets the list */ *properties = strv_free(*properties); return 0; } for (const char *p = rvalue;; ) { _cleanup_free_ char *word = NULL, *resolved = NULL; r = extract_first_word(&p, &word, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring assignment: %s", rvalue); return 0; } if (r == 0) return 0; r = specifier_printf(word, SIZE_MAX, link_specifier_table, NULL, NULL, &resolved); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to resolve specifiers in %s, ignoring assignment: %m", word); continue; } /* The restriction for udev property is not clear. Let's apply the one for environment variable here. */ if (!env_name_is_valid(resolved)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid udev property name, ignoring assignment: %s", resolved); continue; } if (!device_property_can_set(resolved)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid udev property name, ignoring assignment: %s", resolved); continue; } r = strv_consume(properties, TAKE_PTR(resolved)); if (r < 0) return log_error_errno(r, "Failed to update properties: %m"); } } int config_parse_ifalias( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { char **s = ASSERT_PTR(data); assert(filename); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { *s = mfree(*s); return 0; } if (!ascii_is_valid(rvalue)) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Interface alias is not ASCII clean, ignoring assignment: %s", rvalue); return 0; } if (strlen(rvalue) >= IFALIASZ) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Interface alias is too long, ignoring assignment: %s", rvalue); return 0; } return free_and_strdup_warn(s, rvalue); } int config_parse_rx_tx_queues( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { uint32_t k, *v = data; int r; if (isempty(rvalue)) { *v = 0; return 0; } r = safe_atou32(rvalue, &k); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s.", lvalue, rvalue); return 0; } if (k == 0 || k > 4096) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid %s=, ignoring assignment: %s.", lvalue, rvalue); return 0; } *v = k; return 0; } int config_parse_txqueuelen( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { uint32_t k, *v = data; int r; if (isempty(rvalue)) { *v = UINT32_MAX; return 0; } r = safe_atou32(rvalue, &k); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s.", lvalue, rvalue); return 0; } if (k == UINT32_MAX) { log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid %s=, ignoring assignment: %s.", lvalue, rvalue); return 0; } *v = k; return 0; } int config_parse_wol_password( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { LinkConfig *config = ASSERT_PTR(userdata); int r; assert(filename); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { config->wol_password = erase_and_free(config->wol_password); config->wol_password_file = mfree(config->wol_password_file); return 0; } if (path_is_absolute(rvalue) && path_is_safe(rvalue)) { config->wol_password = erase_and_free(config->wol_password); return free_and_strdup_warn(&config->wol_password_file, rvalue); } warn_file_is_world_accessible(filename, NULL, unit, line); r = link_parse_wol_password(config, rvalue); if (r == -ENOMEM) return log_oom(); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s.", lvalue, rvalue); return 0; } config->wol_password_file = mfree(config->wol_password_file); return 0; } int config_parse_rps_cpu_mask( const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata) { _cleanup_(cpu_set_freep) CPUSet *allocated = NULL; CPUSet *mask, **rps_cpu_mask = ASSERT_PTR(data); int r; assert(filename); assert(lvalue); assert(rvalue); if (isempty(rvalue)) { *rps_cpu_mask = cpu_set_free(*rps_cpu_mask); return 0; } if (*rps_cpu_mask) mask = *rps_cpu_mask; else { allocated = new0(CPUSet, 1); if (!allocated) return log_oom(); mask = allocated; } if (streq(rvalue, "disable")) cpu_set_reset(mask); else if (streq(rvalue, "all")) { r = cpu_mask_add_all(mask); if (r < 0) { log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to create CPU affinity mask representing \"all\" cpus, ignoring: %m"); return 0; } } else { r = parse_cpu_set_extend(rvalue, mask, /* warn= */ true, unit, filename, line, lvalue); if (r < 0) return 0; } if (allocated) *rps_cpu_mask = TAKE_PTR(allocated); return 0; } static const char* const mac_address_policy_table[_MAC_ADDRESS_POLICY_MAX] = { [MAC_ADDRESS_POLICY_PERSISTENT] = "persistent", [MAC_ADDRESS_POLICY_RANDOM] = "random", [MAC_ADDRESS_POLICY_NONE] = "none", }; DEFINE_STRING_TABLE_LOOKUP(mac_address_policy, MACAddressPolicy); DEFINE_CONFIG_PARSE_ENUM_WITH_DEFAULT( config_parse_mac_address_policy, mac_address_policy, MACAddressPolicy, MAC_ADDRESS_POLICY_NONE, "Failed to parse MAC address policy"); DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy, _NAMEPOLICY_INVALID, "Failed to parse interface name policy"); DEFINE_CONFIG_PARSE_ENUMV(config_parse_alternative_names_policy, alternative_names_policy, NamePolicy, _NAMEPOLICY_INVALID, "Failed to parse alternative names policy");