[dm-devel] Receiving device failure/removal notification within a dm-target

[Siddharth Choudhuri <sid kernel gmail com>]

Hi,

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