I want to write a clean up function in a device mapper target if the underlying block device fails or if it is removed. This is similar to, for example, having a register_reboot_notifier() inside a dm target so that the target can take appropriate action on a system reboot.
What would be the best way to handle this ? Should I look at the multi path code for any hints ? Appreciate any pointers to this.
Thanks,
-Sid
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