Re: [Libguestfs] Status of R/W UFS

On Tue, Jan 28, 2014 at 08:16:45PM -0500, Andre Goree wrote: > Is r/w to a UFS partition using 'guestmount' still an impossibility? > From everything I've found, it seems to be something that is not > possible at the moment. I was just wondering if that has changed or > if there are plans to change that? libguestfs just uses the Linux kernel's ufs driver. If the Linux kernel gets fixed, we get the ability automatically. > Here is the issue I'm experiencing: > > ~# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/sda4 > /tmp/freebsd-master > libguestfs: error: mount_options: /dev/vda4 on /: mount: wrong fs > type, bad option, bad superblock on /dev/vda4, > missing codepage or helper program, or other error > In some cases useful info is found in syslog - try > dmesg | tail or so > guestmount: '/dev/sda4' could not be mounted. Did you mean one of > these? > /dev/sda4 (ufs) You can pass mount options, if that helps: http://libguestfs.org/guestmount.1.html#options guestmount --rw -a ... -m /dev/sda4:/:ufstype=44bsd /tmp/freebsd-master ufstype must be specified exactly, since the root of the problem is that UFS does not self-identify and exists in many variants. However ... > I have the output from '-- guestmount --rw -a > ${disk_path}/${disk_name} --trace --verbose -m /dev/sda4 > /tmp/freebsd-master' here: http://pastebin.com/NT2b2HM9 ... the error seems to be: [ 1.979202] ufs was compiled with read-only support, can't be mounted as read-write Basically you need to recompile your kernel with read-write UFS support (or persuade whoever compiles your kernel to do the same). > This appears to be a similar problem to this one, in which I > gathered that r/w to ufs is not possible: > https://www.redhat.com/archives/libguestfs/2012-June/msg00077.html > > I get the feeling that this is something I'd need to roll my own > kernel for, or perhaps just the module? If anyone could point me in > the right direction, that'd be awesome. My apologies for the noise > if this is the wrong list for this type of question. Rich.