On Thu, Dec 09, 2021 at 12:06:33PM +0100, Laszlo Ersek wrote:
On 12/09/21 03:28, Yongkui Guo wrote:
Hi Brady, There is a related bug before: Bug 541618 <https://bugzilla.redhat.com/show_bug.cgi?id=541618> - guestfish not able to mount freebsd ufs2 partitions automatically
The last comment on that bug is dated 2013-11-22 at present. With the justification given by Rich in this very thread (= impossible to tell apart different things that all claim to be UFS), is it even possible to fix that bug? Should we close it as CANTFIX?
Yes - I've closed it now with a reference to this thread. Rich.
Thanks Laszlo
On Wed, Dec 8, 2021 at 10:26 PM Laszlo Ersek <lersek@redhat.com> wrote:
On 12/08/21 11:52, Richard W.M. Jones wrote:
On Tue, Dec 07, 2021 at 12:18:30PM -0600, Brady Pratt wrote:
[ 1.998352] >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
The problem is this one and it's not easily resolvable. UFS isn't a single filesystem type, it's a clade of filesystems which all evolved from a common ancestor through the various BSDs, but crucially have the same magic number (so no way to differentiate them). For *BSD itself this isn't a problem since the same OS creates and consumes the filesystem.
(I think it *should* be considered a problem even for the *BSDs; what about moving disks between different BSD versions or flavors?)
But it's a problem for Linux which must be told which filesystem type to mount - and get it wrong, as you can see above, Bad Things happen.
So it's not really possible to resolve this in libguestfs as we don't know the filesystem type until after we have mounted and inspected it.
Rich.
_______________________________________________ Libguestfs mailing list Libguestfs@redhat.com https://listman.redhat.com/mailman/listinfo/libguestfs
-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/