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Michael Chapman
3bdccf69ca
networkd: do not touch link_messages when expiring routes
link_messages is used during link configuration to advance the link state machine through SETTING_ADDRESSES -> SETTING_ROUTES -> CONFIGURED. If a route expires in the middle of this, it is possible for link_messages to hit zero inside route_expire_callback, rather than in route_handler or address_handler where it would trigger the next step in configuration. Should this happen, the link will not complete configuration, and it may not have its static routes configured. Since route_expire_callback does not need to do anything once the expired route has been removed from the kernel, it is safe to simply not account for the netlink request.
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