[libvirt] [PATCH RESEND V2 1/1] Add hw random number generator (/dev/hwrng) to cgroup ACL

[Eric Blake]

On 01/16/2014 06:41 AM, Pradipta Kr. Banerjee wrote:
> From: "Pradipta Kr. Banerjee" <bpradip at in.ibm.com>
> 
> Creating a qemu VM with /dev/hwrng as backend RNG device throws the
> following error - "Could not open '/dev/hwrng': Permission denied"
> This patch fixes the issue
> 
> Signed-off-by: Pradipta Kr. Banerjee <bpradip at in.ibm.com>
> ---
> v2: Added acl code as part of per-VM cgroup setup
> 
>  src/qemu/qemu_cgroup.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)


> 
> diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
> index f0cacd0..8e2076e 100644
> --- a/src/qemu/qemu_cgroup.c
> +++ b/src/qemu/qemu_cgroup.c
> @@ -533,6 +533,18 @@ qemuSetupDevicesCgroup(virQEMUDriverPtr driver,
>              goto cleanup;
>      }
>  
> +    if (vm->def->rng &&
> +        (vm->def->rng->backend == VIR_DOMAIN_RNG_BACKEND_RANDOM)) {
> +            VIR_DEBUG("Setting Cgroup ACL for RNG device");
> +            rv = virCgroupAllowDevicePath(priv->cgroup, vm->def->rng->source.file,
> +                                           VIR_CGROUP_DEVICE_RW);

Indentation is off.  ACK with that fixed, so I pushed the patch.
Congrats on your first libvirt patch, and apologies for the delayed review.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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