Re: [Libvir] virt-df (a 'df' tool for virtual domains)

John Levon wrote: Yes ... There are (at least) four separate reimplementations of filesystem / partition parsing code: - fdisk - libparted - grub (from which libfsimage seems to be derived) - Linux kernel Unfortunately libparted & GRUB don't understand LVM which is kind of a problem because everyone's using LVM nowadays. (Well, everyone in the Linux world, obviously different on Solaris). There is some work that I'm aware of to "librarify" LVM and to get LVM support into libparted. Having said all that, the hand-written code I wrote deals with MBRs, EBRs and ext2/3 and it's under 600 lines of code, and even with LVM support I can't see it going over 1,500 lines in total. The big question is what sort of API could libvirt export? For the general provisioning scenario, perhaps it would be something like this: https://www.redhat.com/archives/libvir-list/2007-September/thread.html#00119 Reading and understanding the contents of block devices OTOH is way beyond what libvirt can or ought to provide. Instead it can export a way to snoop on the contents of the block devices (simple operations like: read the size, seek to an offset, read some bytes); then we could extend libparted to abstract away the Unix syscalls so it can work on the libvirt "virtual block device". Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903