On 06/08/20 14:34, Muneendra Kumar M wrote: > 3) As part of this interface user/deamon will provide the details of VM such > as UUID,PID on VM creation to the transport . The VM process, or the container process, is likely to be unprivileged and cannot obtain the permissions needed to do this; therefore, you need to cope with the situation where there is no PID yet in the cgroup, because the tool that created the VM or container might be initializing the cgroup, but it might not have started the VM yet. In that case there would be no PID. Would it be possible to pass a file descriptor for the cgroup directory in sysfs, instead of the PID? Also what would the kernel API look like for this? Would it have to be driver-specific? Paolo > 4) With VM PID information we need to find the associated blkcg and needs to > update the UUID info in blkio_cg_ priv_data. > 5) Once we update the blkio_cg_ priv_data with vmid all the io’s issued from > VM will have the UUID info as part of blkcg.
