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Re: [libvirt] [PATCHv9 8/9] blockjob: allow mirroring under SELinux and cgroup

On 10/23/12 04:10, Eric Blake wrote:
Use the recent addition of qemuDomainPrepareDiskChainElement to
obtain locking manager lease, permit a block device through cgroups,
and set the SELinux label; then audit the fact that we hand a new
file over to qemu.  Alas, releasing the lease and label at the end
of the mirroring is a trickier prospect (we would have to trace the
backing chain of both source and destination, and be sure not to
revoke rights to any part of the chain that is shared), so for now,
virDomainBlockJobAbort still leaves things with additional access
granted (as block-pull and block-commit have the same problem of
not clamping access after completion, a future cleanup would cover
all three commands).

* src/qemu/qemu_driver.c (qemuDomainBlockCopy): Set up labeling.
  src/qemu/qemu_driver.c | 71 ++++++++++++++++++++++++++++++++++++--------------
  1 file changed, 52 insertions(+), 19 deletions(-)

Hm, Jan will need to figure out how to change qemuOpenFile to work with the DAC driver when dealing with the issue with the patch that you already pushed. This code also probes under qemu's permissions.

At any rate ACK as nearly nobody cares about the DAC driver yet.


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