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networkd: add basic [Link] settings to .network files

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This allows the default link settings (set in .link files) to be overridden per Network. Only MTU and MACAddress is supported for now.
This commit is contained in:
Tom Gundersen 2014-12-04 21:57:13 +01:00
parent c18c2a0ea1
commit c106cc36b9
5 changed files with 56 additions and 1 deletions
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24
man/systemd.network.xml
View File

@ -179,6 +179,30 @@
</refsect1>
<refsect1>
<title>[Link] Section Options</title>
<para> The <literal>[Link]</literal> section accepts the following keys:</para>
<variablelist class='network-directives'>
<varlistentry>
<term><varname>MACAddress=</varname></term>
<listitem>
<para>The hardware address.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>MTUBytes=</varname></term>
<listitem>
<para>The maximum transmission unit in bytes to
set for the device. The usual suffixes K, M, G,
are supported and are understood to the base of
1024.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>[Network] Section Options</title>

17
src/network/networkd-link.c
View File

@ -1074,6 +1074,7 @@ static int link_up(Link *link) {
int r;
assert(link);
assert(link->network);
assert(link->manager);
assert(link->manager->rtnl);
@ -1093,6 +1094,22 @@ static int link_up(Link *link) {
return r;
}
if (link->network->mac) {
r = sd_rtnl_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
if (r < 0) {
log_link_error(link, "Could not set MAC address: %s", strerror(-r));
return r;
}
}
if (link->network->mtu) {
r = sd_rtnl_message_append_u32(req, IFLA_MTU, link->network->mtu);
if (r < 0) {
log_link_error(link, "Could not set MTU: %s", strerror(-r));
return r;
}
}
r = sd_rtnl_call_async(link->manager->rtnl, req, link_up_handler, link,
0, NULL);
if (r < 0) {

2
src/network/networkd-network-gperf.gperf
View File

@ -24,6 +24,8 @@ Match.Host, config_parse_net_condition, CONDITION_HOST,
Match.Virtualization, config_parse_net_condition, CONDITION_VIRTUALIZATION, offsetof(Network, match_virt)
Match.KernelCommandLine, config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(Network, match_kernel)
Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECTURE, offsetof(Network, match_arch)
Link.MACAddress, config_parse_hwaddr, 0, offsetof(Network, mac)
Link.MTUBytes, config_parse_iec_size, 0, offsetof(Network, mtu)
Network.Description, config_parse_string, 0, offsetof(Network, description)
Network.Bridge, config_parse_netdev, 0, offsetof(Network, bridge)
Network.Bond, config_parse_netdev, 0, offsetof(Network, bond)

11
src/network/networkd-network.c
View File

@ -90,7 +90,14 @@ static int network_load_one(Manager *manager, const char *filename) {
network->llmnr = LLMNR_SUPPORT_YES;
r = config_parse(NULL, filename, file,
"Match\0Network\0Address\0Route\0DHCP\0DHCPv4\0BridgePort\0",
"Match\0"
"Link\0"
"Network\0"
"Address\0"
"Route\0"
"DHCP\0"
"DHCPv4\0"
"BridgePort\0",
config_item_perf_lookup, network_network_gperf_lookup,
false, false, true, network);
if (r < 0)
@ -163,6 +170,8 @@ void network_free(Network *network) {
free(network->description);
free(network->dhcp_vendor_class_identifier);
free(network->mac);
strv_free(network->ntp);
strv_free(network->dns);
strv_free(network->domains);

3
src/network/networkd.h
View File

@ -108,6 +108,9 @@ struct Network {
unsigned cost;
struct ether_addr *mac;
unsigned mtu;
LIST_HEAD(Address, static_addresses);
LIST_HEAD(Route, static_routes);