NetBSD/sys/dev/dm/TODO

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Important unimplemented features in current device-mapper implementation
* Implement dm_dev_event_ioctl and dm_target_msg_ioctl functions
* Write more targets mirror.
* Snapshot target, there is some code in repository already
General LVM tasks
* Cleanup resize_ffs to properly resize filesystem on LV
* Integrate LVM with the sysinst, so we can configure LVM during installation
* Parse whole config line for every target in NetBSD libdevmapper and do not
work with strings in the kernel.
Pain in the sky tasks
* Implement multipath target for network attached storage devices.
* Cluster lvm extension, NetBSD needs Distributed Lock Manager for this.
* Write GPL free libdevmapper and lvm2tools.
See http://mail-index.netbsd.org/tech-kern/2008/09/24/msg002794.html