The QEMU vhost-user-blk-pci host driver will not negotiate
VIRTIO_BLK_F_RO feature bit by default, users must append
`config-ro=true` to enable it if the backend device can
support read only feature.
Fix the issue #254.
Change-Id: I17dcc1b80bde094dd4873221b681d0c4049abb39
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/408266
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
d08a33f5a3