[Libguestfs] [PATCH 0/4] Allow shrinking of ext2, PVs and NTFS

This patch series allows you to shrink various objects, as requested in the following bugs: https://bugzilla.redhat.com/show_bug.cgi?id=585221 # resize2fs https://bugzilla.redhat.com/show_bug.cgi?id=585222 # pvresize https://bugzilla.redhat.com/show_bug.cgi?id=585223 # ntfsresize The first patch provides a consistent way to specify numbers with suffixes to guestfish, eg: truncate-size /foo 1G It also unifies the number parsing code used by 'alloc' and 'sparse' commands to use the same Gnulib function. Patches 2-4 implement the resizing. With all four patches applied you can shrink filesystems even where the container is larger, and you can use suffixes to specify the new filesystem size. Example using resize2fs-size: $ guestfish -N fs:ext3:1G Welcome to guestfish, the libguestfs filesystem interactive shell for editing virtual machine filesystems. Type: 'help' for a list of commands 'man' to read the manual 'quit' to quit the shell ext3 1073741312 1073741312 Filesystem Size Used Avail Use% Mounted on /dev/vda1 98M 17M 77M 18% /sysroot Example using pvresize-size: $ guestfish -N part:1G Welcome to guestfish, the libguestfs filesystem interactive shell for editing virtual machine filesystems. Type: 'help' for a list of commands 'man' to read the manual 'quit' to quit the shell [0] = { [...] pv_size: 536870912 dev_size: 1073741312 [...] } Example using ntfsresize-size: $ guestfish -N fs:ntfs:1G Welcome to guestfish, the libguestfs filesystem interactive shell for editing virtual machine filesystems. Type: 'help' for a list of commands 'man' to read the manual 'quit' to quit the shell Filesystem Size Used Avail Use% Mounted on /dev/vda1 512M 5.6M 507M 2% /sysroot Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/