[libvirt] [Qemu-devel] QEMU fstatfs(2) and libvirt SELinux policy

[Paolo Bonzini]

Il 09/03/2012 17:07, Stefan Hajnoczi ha scritto:
>> > So am I correct that this extra permission is only needed for a single
>> > RHEL6 release? If qemu won't be doing fstafs on an ongoing basis, it
>> > doesn't seem like a good idea to permanently open up the permissions
>> > allowed by virt_use_nfs
> Paolo, your discard improvements in QEMU add FALLOC_FL_PUNCH_HOLE
> support.  XFS supports this fallocate() flag in current kernels,
> thereby making the XFS-specific support obsolete.
> 
> I'm wondering whether it's worth expanding the SELinux policy if we
> will have no fstatfs(2) callers in QEMU.  Are you planning to drop the
> XFS code?

Chris Wedgwood said that on XFS you want to do discard even if the file
is preallocated, while this is not true on other filesystems.  So I
guess the detection code should stay.

Paolo