diff --git a/man/systemd.link.xml b/man/systemd.link.xml
index be8dda0bac..2209e96037 100644
--- a/man/systemd.link.xml
+++ b/man/systemd.link.xml
@@ -356,6 +356,17 @@
+
+ AlternativeNamesPolicy=
+
+ A space-separated list of policies by which the interface's alternative names
+ should be set. Each of the policies may fail, and all successful policies are used. The
+ available policies are database, onboard,
+ slot, path, and mac. If the
+ kernel does not support the alternative names, then this setting will be ignored.
+
+
+
AlternativeName=
diff --git a/src/udev/net/link-config-gperf.gperf b/src/udev/net/link-config-gperf.gperf
index e0212bbc18..a1105fa674 100644
--- a/src/udev/net/link-config-gperf.gperf
+++ b/src/udev/net/link-config-gperf.gperf
@@ -19,40 +19,41 @@ struct ConfigPerfItem;
%struct-type
%includes
%%
-Match.MACAddress, config_parse_hwaddrs, 0, offsetof(link_config, match_mac)
-Match.OriginalName, config_parse_match_ifnames, 0, offsetof(link_config, match_name)
-Match.Path, config_parse_match_strv, 0, offsetof(link_config, match_path)
-Match.Driver, config_parse_match_strv, 0, offsetof(link_config, match_driver)
-Match.Type, config_parse_match_strv, 0, offsetof(link_config, match_type)
-Match.Property, config_parse_match_property, 0, offsetof(link_config, match_property)
-Match.Host, config_parse_net_condition, CONDITION_HOST, offsetof(link_config, conditions)
-Match.Virtualization, config_parse_net_condition, CONDITION_VIRTUALIZATION, offsetof(link_config, conditions)
-Match.KernelCommandLine, config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(link_config, conditions)
-Match.KernelVersion, config_parse_net_condition, CONDITION_KERNEL_VERSION, offsetof(link_config, conditions)
-Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECTURE, offsetof(link_config, conditions)
-Link.Description, config_parse_string, 0, offsetof(link_config, description)
-Link.MACAddressPolicy, config_parse_mac_address_policy, 0, offsetof(link_config, mac_address_policy)
-Link.MACAddress, config_parse_hwaddr, 0, offsetof(link_config, mac)
-Link.NamePolicy, config_parse_name_policy, 0, offsetof(link_config, name_policy)
-Link.Name, config_parse_ifname, 0, offsetof(link_config, name)
-Link.AlternativeName, config_parse_ifnames, 1, offsetof(link_config, alternative_names)
-Link.Alias, config_parse_ifalias, 0, offsetof(link_config, alias)
-Link.MTUBytes, config_parse_mtu, AF_UNSPEC, offsetof(link_config, mtu)
-Link.BitsPerSecond, config_parse_si_size, 0, offsetof(link_config, speed)
-Link.Duplex, config_parse_duplex, 0, offsetof(link_config, duplex)
-Link.AutoNegotiation, config_parse_tristate, 0, offsetof(link_config, autonegotiation)
-Link.WakeOnLan, config_parse_wol, 0, offsetof(link_config, wol)
-Link.Port, config_parse_port, 0, offsetof(link_config, port)
-Link.GenericSegmentationOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_GSO])
-Link.TCPSegmentationOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_TSO])
-Link.TCP6SegmentationOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_TSO6])
-Link.UDPSegmentationOffload, config_parse_warn_compat, DISABLED_LEGACY, 0
-Link.GenericReceiveOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_GRO])
-Link.LargeReceiveOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_LRO])
-Link.RxChannels, config_parse_channel, 0, offsetof(link_config, channels)
-Link.TxChannels, config_parse_channel, 0, offsetof(link_config, channels)
-Link.OtherChannels, config_parse_channel, 0, offsetof(link_config, channels)
-Link.CombinedChannels, config_parse_channel, 0, offsetof(link_config, channels)
-Link.Advertise, config_parse_advertise, 0, offsetof(link_config, advertise)
-Link.RxBufferSize, config_parse_nic_buffer_size, 0, offsetof(link_config, ring)
-Link.TxBufferSize, config_parse_nic_buffer_size, 0, offsetof(link_config, ring)
+Match.MACAddress, config_parse_hwaddrs, 0, offsetof(link_config, match_mac)
+Match.OriginalName, config_parse_match_ifnames, 0, offsetof(link_config, match_name)
+Match.Path, config_parse_match_strv, 0, offsetof(link_config, match_path)
+Match.Driver, config_parse_match_strv, 0, offsetof(link_config, match_driver)
+Match.Type, config_parse_match_strv, 0, offsetof(link_config, match_type)
+Match.Property, config_parse_match_property, 0, offsetof(link_config, match_property)
+Match.Host, config_parse_net_condition, CONDITION_HOST, offsetof(link_config, conditions)
+Match.Virtualization, config_parse_net_condition, CONDITION_VIRTUALIZATION, offsetof(link_config, conditions)
+Match.KernelCommandLine, config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(link_config, conditions)
+Match.KernelVersion, config_parse_net_condition, CONDITION_KERNEL_VERSION, offsetof(link_config, conditions)
+Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECTURE, offsetof(link_config, conditions)
+Link.Description, config_parse_string, 0, offsetof(link_config, description)
+Link.MACAddressPolicy, config_parse_mac_address_policy, 0, offsetof(link_config, mac_address_policy)
+Link.MACAddress, config_parse_hwaddr, 0, offsetof(link_config, mac)
+Link.NamePolicy, config_parse_name_policy, 0, offsetof(link_config, name_policy)
+Link.Name, config_parse_ifname, 0, offsetof(link_config, name)
+Link.AlternativeName, config_parse_ifnames, 1, offsetof(link_config, alternative_names)
+Link.AlternativeNamesPolicy, config_parse_alternative_names_policy, 0, offsetof(link_config, alternative_names_policy)
+Link.Alias, config_parse_ifalias, 0, offsetof(link_config, alias)
+Link.MTUBytes, config_parse_mtu, AF_UNSPEC, offsetof(link_config, mtu)
+Link.BitsPerSecond, config_parse_si_size, 0, offsetof(link_config, speed)
+Link.Duplex, config_parse_duplex, 0, offsetof(link_config, duplex)
+Link.AutoNegotiation, config_parse_tristate, 0, offsetof(link_config, autonegotiation)
+Link.WakeOnLan, config_parse_wol, 0, offsetof(link_config, wol)
+Link.Port, config_parse_port, 0, offsetof(link_config, port)
+Link.GenericSegmentationOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_GSO])
+Link.TCPSegmentationOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_TSO])
+Link.TCP6SegmentationOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_TSO6])
+Link.UDPSegmentationOffload, config_parse_warn_compat, DISABLED_LEGACY, 0
+Link.GenericReceiveOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_GRO])
+Link.LargeReceiveOffload, config_parse_tristate, 0, offsetof(link_config, features[NET_DEV_FEAT_LRO])
+Link.RxChannels, config_parse_channel, 0, offsetof(link_config, channels)
+Link.TxChannels, config_parse_channel, 0, offsetof(link_config, channels)
+Link.OtherChannels, config_parse_channel, 0, offsetof(link_config, channels)
+Link.CombinedChannels, config_parse_channel, 0, offsetof(link_config, channels)
+Link.Advertise, config_parse_advertise, 0, offsetof(link_config, advertise)
+Link.RxBufferSize, config_parse_nic_buffer_size, 0, offsetof(link_config, ring)
+Link.TxBufferSize, config_parse_nic_buffer_size, 0, offsetof(link_config, ring)
diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
index ca11cfd9e3..19cecf1895 100644
--- a/src/udev/net/link-config.c
+++ b/src/udev/net/link-config.c
@@ -59,6 +59,7 @@ static void link_config_free(link_config *link) {
free(link->name_policy);
free(link->name);
strv_free(link->alternative_names);
+ free(link->alternative_names_policy);
free(link->alias);
free(link);
@@ -326,6 +327,7 @@ static int get_mac(sd_device *device, MACAddressPolicy policy, struct ether_addr
int link_config_apply(link_config_ctx *ctx, link_config *config,
sd_device *device, const char **name) {
+ _cleanup_strv_free_ char **altnames = NULL;
struct ether_addr generated_mac;
struct ether_addr *mac = NULL;
const char *new_name = NULL;
@@ -461,11 +463,52 @@ int link_config_apply(link_config_ctx *ctx, link_config *config,
if (r < 0)
return log_warning_errno(r, "Could not set Alias=, MACAddress= or MTU= on %s: %m", old_name);
- r = rtnl_set_link_alternative_names(&ctx->rtnl, ifindex, config->alternative_names);
+ 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;
+
+ 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("invalid policy");
+ }
+ if (!isempty(n)) {
+ r = strv_extend(&altnames, n);
+ if (r < 0)
+ return log_oom();
+ }
+ }
+
+ if (new_name)
+ strv_remove(altnames, new_name);
+ strv_remove(altnames, old_name);
+ strv_uniq(altnames);
+
+ r = rtnl_set_link_alternative_names(&ctx->rtnl, ifindex, altnames);
if (r == -EOPNOTSUPP)
- log_debug_errno(r, "Could not set AlternativeName= on %s, ignoring: %m", old_name);
+ log_debug_errno(r, "Could not set AlternativeName= or apply AlternativeNamesPolicy= on %s, ignoring: %m", old_name);
else if (r < 0)
- return log_warning_errno(r, "Could not set AlternativeName= on %s: %m", old_name);
+ return log_warning_errno(r, "Could not set AlternativeName= or apply AlternativeNamesPolicy= on %s: %m", old_name);
*name = new_name;
@@ -513,3 +556,16 @@ DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);
DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy,
_NAMEPOLICY_INVALID,
"Failed to parse interface name policy");
+
+static const char* const alternative_names_policy_table[_NAMEPOLICY_MAX] = {
+ [NAMEPOLICY_DATABASE] = "database",
+ [NAMEPOLICY_ONBOARD] = "onboard",
+ [NAMEPOLICY_SLOT] = "slot",
+ [NAMEPOLICY_PATH] = "path",
+ [NAMEPOLICY_MAC] = "mac",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(alternative_names_policy, NamePolicy);
+DEFINE_CONFIG_PARSE_ENUMV(config_parse_alternative_names_policy, alternative_names_policy, NamePolicy,
+ _NAMEPOLICY_INVALID,
+ "Failed to parse alternative names policy");
diff --git a/src/udev/net/link-config.h b/src/udev/net/link-config.h
index b5073548ab..1c3a3f7fd4 100644
--- a/src/udev/net/link-config.h
+++ b/src/udev/net/link-config.h
@@ -47,6 +47,7 @@ struct link_config {
struct ether_addr *mac;
MACAddressPolicy mac_address_policy;
NamePolicy *name_policy;
+ NamePolicy *alternative_names_policy;
char *name;
char **alternative_names;
char *alias;
@@ -79,6 +80,9 @@ int link_get_driver(link_config_ctx *ctx, sd_device *device, char **ret);
const char *name_policy_to_string(NamePolicy p) _const_;
NamePolicy name_policy_from_string(const char *p) _pure_;
+const char *alternative_names_policy_to_string(NamePolicy p) _const_;
+NamePolicy alternative_names_policy_from_string(const char *p) _pure_;
+
const char *mac_address_policy_to_string(MACAddressPolicy p) _const_;
MACAddressPolicy mac_address_policy_from_string(const char *p) _pure_;
@@ -87,3 +91,4 @@ const struct ConfigPerfItem* link_config_gperf_lookup(const char *key, GPERF_LEN
CONFIG_PARSER_PROTOTYPE(config_parse_mac_address_policy);
CONFIG_PARSER_PROTOTYPE(config_parse_name_policy);
+CONFIG_PARSER_PROTOTYPE(config_parse_alternative_names_policy);
diff --git a/test/fuzz/fuzz-link-parser/directives.link b/test/fuzz/fuzz-link-parser/directives.link
index 5c26129b70..abf21f678a 100644
--- a/test/fuzz/fuzz-link-parser/directives.link
+++ b/test/fuzz/fuzz-link-parser/directives.link
@@ -16,6 +16,7 @@ MACAddressPolicy=
MACAddress=
NamePolicy=
Name=
+AlternativeNamesPolicy=
AlternativeName=
Alias=
MTUBytes=