A notification chain is simply a list of functions to execute when a given event occurs.
The owner simply defines the list; any kernel subsystem can register a callback function with that chain to receive the notification.
- notifier_chain_register
- notifier_call_chain
inetaddr_chain : Sends notifications about the insertion, removal, and change of an Internet Protocol Version 4 (IPv4) address on a local interface. netdev_chain : Sends notifications about the registration status of network devices.
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