Hi folks, Today I have committed couple of changes to haad-dm branch. With these latest changes I was able to use lvremove, lvextend, lvreduce etc.. I believe that haad-dm is currently in a good shape and it only needs more testing to fix all possible outstanding bugs. for all brave testers I have created new chapter in NetBSD Guide about lvm support [1]. Instructions how to test lvm: 1) update src/sys and src/external to haad-dm branch.2) if you kernel supports new modules build new module in src/sys/ modules/dm or build new kernel with this line pseudo-device dm line. Load module/ reboot new kernel. 3) build lvm2tools and libdevmapper in src/external/gpl2/ and install them.
4) use tools lvm to manage your lvm devices. lvm pvcreate /dev/raw_disk_device # create Physical Volume *lvm vgcreate vg00 /dev/raw_disk_device #create Volume Group-> pool of available disk space. lvm lvcreate -L20M -n lv1 vg00 # create Logical volume aka Logical disk device newfs -F -s 20M /dev/vg00/rlv1 # newfs without -F and -s doesn't work
mount /dev/vg00/lv1 /mnt # EnjoyAfter reboot you can activate all existing LV in system with command.
lvm vgchange -a y You can uselvm lvdisplay vgdisplay pvdisplay to see at status of your LVM devices.
You can also use lvm lvextend/lvreduce to change size of LV.I haven't tested my driver on SMP system there are probably some bugs in locking so be aware of it :) and do not try to extend/reduce partition during IO
(something bad can happend). TODO:1) review locking I will probably allow only one ioctl call to be inside dm driver
at time. 2) Write snapshot driver only skeleton was written yet.3) Add ioctls needed to correct newfs functionality. I tried to implement them
in device-mapper.c::dmgetdisklabel but it doesn't work still.4) Write lvm rc.d script to enable LVM before disk mount so we can use lvm for
system partitions.* If you are using disklabel partition a as raw_disk_device it MUST start after disklabel
blocks. Offset of a partition should be 65s. P.S. I will not be able to answer any bug mails till sunday. [1]http://www.netbsd.org/~haad/lvm_doc.diff Regards Adam.
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