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-rw-r--r--src/udev/net/link-config.c1133
1 files changed, 1133 insertions, 0 deletions
diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
new file mode 100644
index 0000000..910ec27
--- /dev/null
+++ b/src/udev/net/link-config.c
@@ -0,0 +1,1133 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <linux/netdevice.h>
+#include <netinet/ether.h>
+#include <unistd.h>
+
+#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 "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 "stat-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "utf8.h"
+
+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);
+ 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);
+
+ 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);
+ free(link->kind);
+ strv_free(link->altnames);
+ return mfree(link);
+}
+
+int link_new(LinkConfigContext *ctx, sd_netlink **rtnl, sd_device *device, Link **ret) {
+ _cleanup_(link_freep) Link *link = NULL;
+ int r;
+
+ assert(ctx);
+ assert(rtnl);
+ assert(device);
+ assert(ret);
+
+ link = new(Link, 1);
+ if (!link)
+ return -ENOMEM;
+
+ *link = (Link) {
+ .device = sd_device_ref(device),
+ };
+
+ 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) {
+ LinkConfig *config;
+ const char *name;
+ int r;
+
+ assert(link);
+ assert(link->config);
+ assert(ethtool_fd);
+
+ 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) {
+ struct hw_addr_data hw_addr = {};
+ LinkConfig *config;
+ int r;
+
+ assert(link);
+ assert(link->config);
+ assert(rtnl);
+
+ 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, "Skipping to apply 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, "Skipping to apply 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) {
+ SRIOV *sr_iov;
+ uint32_t n;
+ int r;
+
+ assert(link);
+ assert(link->config);
+ assert(link->device);
+
+ 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;
+}
+
+int link_apply_config(LinkConfigContext *ctx, sd_netlink **rtnl, Link *link) {
+ int r;
+
+ assert(ctx);
+ assert(rtnl);
+ assert(link);
+
+ if (!IN_SET(link->action, SD_DEVICE_ADD, SD_DEVICE_BIND, SD_DEVICE_MOVE)) {
+ log_link_debug(link, "Skipping to apply .link settings on '%s' uevent.",
+ device_action_to_string(link->action));
+
+ link->new_name = link->ifname;
+ return 0;
+ }
+
+ r = link_apply_ethtool_settings(link, &ctx->ethtool_fd);
+ if (r < 0)
+ return r;
+
+ r = link_apply_rtnl_settings(link, rtnl);
+ 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);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+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;
+}
+
+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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 00:18:57 +0000