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| author | Viktor Mihajlovski <mihajlov@linux.ibm.com> | 2021-04-14 13:01:35 +0200 |
|---|---|---|
| committer | Viktor Mihajlovski <mihajlov@linux.ibm.com> | 2021-04-21 18:11:18 +0200 |
| commit | e70eca9b48df906a3e2d9f36d3acd4b5cb9ae553 (patch) | |
| tree | 158f5af06f773e2b4e36b4c5a658af55a56f6718 /rules.d | |
| parent | 5c9f1c68f032287da3fa7f5c4c08dfb0bf340c0b (diff) | |
| download | systemd-e70eca9b48df906a3e2d9f36d3acd4b5cb9ae553.tar.gz | |
network: enable DHCP broadcast flag if required by interface
Some interfaces require that the DHCPOFFER message is sent via broadcast
if they can't receive unicast messages before they've been configured
with an IP address.
E.g., s390 ccwgroup network interfaces operating in layer3 mode face
this limitation. This can prevent the interfaces from receiving an
IP address via DHCP, if the have been configured for layer3.
To allow DHCP over such interfaces, we're introducing a new device
property ID_NET_DHCP_BROADCAST which can be set for those.
The networkd DHCP client will check whether this property is set
for an interface, and if so will set the broadcast flag, unless
the network configuration for the interface has an explicit
RequestBroadcast setting.
Besides that, we're adding a udev rule to set this device property
for ccwgroup devices operating in layer3 mode, which is the case
if the ID_NET_DRIVER property is qeth_l3.
Supercedes #18829
Diffstat (limited to 'rules.d')
| -rw-r--r-- | rules.d/81-net-dhcp.rules | 14 | ||||
| -rw-r--r-- | rules.d/meson.build | 1 |
2 files changed, 15 insertions, 0 deletions
diff --git a/rules.d/81-net-dhcp.rules b/rules.d/81-net-dhcp.rules new file mode 100644 index 0000000000..2ef25ba060 --- /dev/null +++ b/rules.d/81-net-dhcp.rules @@ -0,0 +1,14 @@ +# do not edit this file, it will be overwritten on update + +ACTION=="remove", GOTO="net_dhcp_end" +SUBSYSTEM!="net", GOTO="net_dhcp_end" + +# Network interfaces requiring DHCPOFFER messages to be broadcast +# must set ID_NET_DHCP_BROADCAST to "1". This property will be +# checked by the networkd DHCP4 client to set the DHCP option + +# s390 ccwgroup interfaces in layer3 mode need broadcast DHCPOFFER +# using the link driver to detect this condition +ENV{ID_NET_DRIVER}=="qeth_l3", ENV{ID_NET_DHCP_BROADCAST}="1" + +LABEL="net_dhcp_end" diff --git a/rules.d/meson.build b/rules.d/meson.build index 42fa451c6b..4bbba09fd5 100644 --- a/rules.d/meson.build +++ b/rules.d/meson.build @@ -26,6 +26,7 @@ rules = files(''' 75-probe_mtd.rules 78-sound-card.rules 80-net-setup-link.rules + 81-net-dhcp.rules '''.split()) if conf.get('HAVE_KMOD') == 1 |