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DM device-mapper driver status
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In this year Summer of Code I'm working on NetBSD support for LVM.
With help of my
mentor (@blymn) I have selected these tasks to do:
1) rewrite ioctl interface to proplib
2) get lvm2tools and libdevmapper working in NetBSD.
Before GSOC I have written NetBSD version of device-mapper driver.
This driver is used
to create virtual block devices (Logical volumes). This driver use old
Last working version is tagged in my monotone repository* with this
tag NetBSD dm 0.1.
During community bonding period I worked on libdevmapper and
lvm2tools. I have rewritten
some parts of lvm2tools and libdevmapper to properly work without
procfs and usage of raw
devices. Last working version of lvm2tools were tagged in my repo as
I tried to upgrade LVM2tools to newer version (current version is
2.02.36) but I found
that best option is write all necessary parts on my in database
version and later port
them to current LVM2tools.
Now I'm working on new proplib interface for dm-kernel driver and
libdevmapper. Work is
Proplib version of libdevmapper uses 3 new NetBSD specific files:
lib/ioctl files create proplib dictionary from libdevmapper
dm_ioctl structure (which is passed to kernel in linux
version of this protocol). This dictionary is later send to
kernel. After successful ioctl call is proplib dictionary parsed
to dm_ioctl struct. This way I keep netbsd changes in 2 files and
we can upgrade libdevmapper library to new versions easily.
I have a blog at  I keep it updated so if you are interested in
this SOC project try to look there.
*http://126.96.36.199:8080/dm/tags viewmtn or mtn://188.8.131.52
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