Hide Forgot
Description of problem: virtio-scsi data-plane does not support block_resize. Version-Release number of selected component (if applicable): Host: kernel:3.10.0-394.el7.x86_64 qemu-kvm-rhev:qemu-kvm-rhev-2.6.0-1.el7.x86_64 Guest: kernel:3.10.0-394.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1.Boot guest with a data-plane disk /usr/libexec/qemu-kvm -name rhel7.3 -machine pc-i440fx-rhel7.2.0,accel=kvm \ -cpu SandyBridge -m 2G -numa node \ -smp 4,sockets=2,cores=2,threads=1 \ -netdev tap,id=hostnet0 \ -device virtio-net-pci,netdev=hostnet0,id=net0,mac=12:54:00:5c:88:61 \ -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vgamem_mb=16 \ -spice port=5901,addr=0.0.0.0,disable-ticketing,image-compression=off,seamless-migration=on \ -monitor stdio \ -serial unix:/tmp/monitor,server,nowait \ -qmp tcp:0:5555,server,nowait \ -object iothread,id=iothread0 \ -drive file=/home/RHEL-Server-7.3-64-virtio-scsi.qcow2,if=none,id=drive-scsi-disk0,format=qcow2,cache=none,werror=stop,rerror=stop \ -device virtio-scsi-pci,id=scsi0,iothread=iothread0 \ -device scsi-hd,drive=drive-scsi-disk0,bus=scsi0.0,scsi-id=0,lun=0,id=scsi-disk0 \ 2. Resize this disk, qemu prompt 'Device 'drive-scsi-disk1' is in use' . { "execute": "block_resize", "arguments": { "device": "drive-scsi-disk1", "size": 1073741824 } } {"error": {"class": "GenericError", "desc": "Device 'drive-scsi-disk1' is in use"}} Actual results: {"error": {"class": "GenericError", "desc": "Device 'drive-scsi-disk1' is in use"}} Expected results: The disk with data-plan should be resized. Additional info:
Correction of step1(I missed the second data disk in the qemu commend line): ... -drive file=/home/data,if=none,id=drive-scsi-disk1,format=qcow2,cache=none,werror=stop,rerror=stop \ -device virtio-scsi-pci,id=scsi1,iothread=iothread0 \ -device scsi-hd,drive=drive-scsi-disk1,bus=scsi1.0,scsi-id=0,lun=0,id=scsi-disk1 \
More info: 1. Can not find data-plane information from qemu help . # /usr/libexec/qemu-kvm -device virtio-scsi,? 2. Can not find data-plane information of disk from qtree info. (qemu) info qtree
This is about the op blockers that should be removed from virtio-scsi. Upstream patches: https://lists.nongnu.org/archive/html/qemu-devel/2016-05/msg03015.html
Fix included in qemu-kvm-rhev-2.6.0-10.el7
Verified: Versions:qemu-kvm-rhev-2.6.0-10.el7.x86_64 Steps: 1.Boot guest with a data-plane disk(Same with step 1 in Description and Comment 1) 2. Check disk size before resize # qemu-img info data image: data file format: qcow2 virtual size: 100M (104857600 bytes) disk size: 196K cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false 3. Resize data disk { "execute": "block_resize", "arguments": { "device": "drive-scsi-disk1", "size": 1073741824 } } {"return": {}} # qemu-img info data image: data file format: qcow2 virtual size: 1.0G (1073741824 bytes) disk size: 200K cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false So this bug has been fixed well. Thank you.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-2673.html