[libvirt] [PATCH v2 0/4] RFC: grant KVM guest rawio capability

[Taku Izumi]

 This is the new version of 
  http://www.redhat.com/archives/libvir-list/2012-January/msg01312.html
  
 Thank you for reviewing, Danie, Paolo, and Eric.
  
--
 This patchset achieves #1 and #2 of the following tasks:
  
> 1. rawio="yes|nmo"  on the <disk> element somewhere
> 2. Give the QEMU process CAP_SYS_RAWIO
> 3. Use the devices cgroup to specify which individual disks
> can use rawio.

 In short, if you specify the following XML:
 
   <disk type='block' device='lun' rawio='yes'>
   
 the domain will be granted CAP_SYS_RAWIO.
 
 # virsh start VM
# cat /proc/<VM's PID>/status
...
CapInh: 0000000000000000
CapPrm: fffffffc00020000
CapEff: fffffffc00020000
CapBnd: fffffffc00020000
...
 
  *[PATCH v2 1/4] conf: add rawio attribute to disk element of domain XML
  *[PATCH v2 2/4] util: add functions to keep capabilities
  *[PATCH v2 3/4] util: extend virExecWithHook()
  *[PATCH v2 4/4] qemu: make qemu processes to retain rawio capability

-
Best regards,
Taku Izumi