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network/brvlan: remove unnecessary bridge vlan IDs

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When an interface is being reconfigured with different bridge vlan
settings, this makes old vlan IDs on the interface removed.

This also makes the PVID= setting support negative boolean value, e.g. "no",
in which case, the currently assigned PVID (typically, assigned by the
kernel when an interface is joined to a bridge) is dropped.
This feature is requested by #15291.

Note, if a .network file has no settings about bridge vlan, networkd
keeps the currently assigned vlan IDs. That's intended, to make not
break existing setups.
When a .network file has only PVID=no line in [BridgeVLAN] section, then
all assigned vlan IDs are removed.

Fixes #29975.
Closes #15291.
This commit is contained in:
Yu Watanabe
2023-11-13 03:58:46 +09:00
parent 11cee6efbf
commit 228693af47
8 changed files with 140 additions and 20 deletions
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src/network/networkd-queue.c
+2 -1
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@@ -303,7 +303,8 @@ static const char *const request_type_table[_REQUEST_TYPE_MAX] = {
[REQUEST_TYPE_SET_LINK_ADDRESS_GENERATION_MODE] = "IPv6LL address generation mode",
[REQUEST_TYPE_SET_LINK_BOND] = "bond configurations",
[REQUEST_TYPE_SET_LINK_BRIDGE] = "bridge configurations",
[REQUEST_TYPE_SET_LINK_BRIDGE_VLAN] = "bridge VLAN configurations",
[REQUEST_TYPE_SET_LINK_BRIDGE_VLAN] = "bridge VLAN configurations (step 1)",
[REQUEST_TYPE_DEL_LINK_BRIDGE_VLAN] = "bridge VLAN configurations (step 2)",
[REQUEST_TYPE_SET_LINK_CAN] = "CAN interface configurations",
[REQUEST_TYPE_SET_LINK_FLAGS] = "link flags",
[REQUEST_TYPE_SET_LINK_GROUP] = "interface group",