Thanks! That did it!
-----Original Message-----
From: Benoît Canet [mailto:benoit.ca...@irqsave.net]
Sent: Tuesday, October 14, 2014 12:20 PM
To: Chiang, Ken
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [EXTERNAL] Re: how to dynamically add a block device
using qmp?
The Monday 13 Oct 2014 à 14:08:18 (-0700), Ken Chiang wrote :
> I also tried to add a virt io device to the frontend but still no disc in the
> VM. Am I missing anything else?
>
>
> {"QMP": {"version": {"qemu": {"micro": 0, "minor": 0, "major": 2},
> "package": " (Debian 2.0.0+dfsg-2ubuntu1.2)"}, "capabilities": []}}
> {"execute":"qmp_capabilities"}
> {"return": {}}
> { "execute": "blockdev-add",
> "arguments": { "options" : {
> "id": "tc1",
> "driver": "qcow2",
> "file": { "driver": "file",
> "filename": "test.qc2" } } } }
>
> {"return": {}}
> { "execute": "device_add", "arguments": {
> "driver": "virtio-blk-pci", "id": "vda", "drive": "tc1" } }
> {"return": {}}
>
> Thanks!
Maybe try
for m in acpiphp pci_hotplug; do sudo modprobe ${m}; done in the guest before
adding the pci device.
Best regards
Benoît
>
> Ken
>
>
>
> Date: Mon, 13 Oct 2014 12:28:51 -0700
> From: Ken Chiang <kchi...@sandia.gov>
> To: Markus Armbruster <arm...@redhat.com>
> Subject: Re: [EXTERNAL] Re: [Qemu-devel] how to dynamically add a
> block device using qmp?
> Message-ID: <20141013192851.ga12...@sandia.gov>
> In-Reply-To: <87k347f0do....@blackfin.pond.sub.org>
> User-Agent: Mutt/1.5.18 (2008-05-17)
>
> Markus,
>
> Nevermind my previous question, I see now that you add a scsi bus prior to
> adding the scsi disk.
>
> However, I did this and qmp returned {[]} in both cases and I am still not
> seeing the disk in the vm.
>
>
> here's the qmp session:
>
> {"execute":"qmp_capabilities"}
> {"return": {}}
> { "execute": "blockdev-add",
>
> "arguments": { "options" : {
>
> "id": "tc1",
>
> "driver": "qcow2",
>
> "file": { "driver": "file",
>
> "filename": "/home/kchiang/kvmimages/xpsp2_b-02222012.qc2"
> } } } }
> {"return": {}}
> { "execute": "device_add", "arguments": {
> "driver": "virtio-scsi-pci", "id": "vs-hba" } }
> {"return": {}}
> { "execute": "device_add", "arguments": {
> "driver": "scsi-disk", "id": "sdb", "drive": "tc1",
> "bus": "vs-hba.0" } }
> {"return": {}}
> { "execute": "query-block" }
> {"return": [{"io-status": "ok", "device": "ide0-hd0", "locked": false,
> "removable": false, "inserted": {"iops_rd": 0, "image":
> {"virtual-size": 5999951872, "filename":
> "kvmimages/vts-6g-u12-inetsim.image", "format": "raw", "actual-size":
> 5999955968, "dirty-flag": false}, "iops_wr": 0, "ro": false,
> "backing_file_depth": 0, "drv": "raw", "iops": 0, "bps_wr": 0,
> "encrypted": false, "bps": 0, "bps_rd": 0, "file":
> "kvmimages/vts-6g-u12-inetsim.image", "encryption_key_missing":
> false}, "type": "unknown"}, {"io-status": "ok", "device": "ide1-cd0",
> "locked": false, "removable": true, "tray_open": false, "type":
> "unknown"}, {"device": "floppy0", "locked": false, "removable": true,
> "tray_open": false, "type": "unknown"}, {"device": "sd0", "locked":
> false, "removable": true, "tray_open": false, "type": "unknown"},
> {"io-status": "ok", "device": "tc1", "locked": false, "removable":
> false, "inserted": {"iops_rd": 0, "image": {"virtual-size":
> 5368709120, "filename":
> "/home/kchiang/kvmimages/xpsp2_b-02222012.qc2", "cluster-size": 65536,
> "format": "qcow2", "actual-size": 1550454784, "format-specific":
> {"type": "qcow2", "data": {"compat": "0.10"}}, "dirty-flag": false},
> "iops_wr": 0, "ro": false, "backing_file_depth": 0, "drv": "qcow2",
> "iops": 0, "bps_wr": 0, "encrypted": false, "bps": 0, "bps_rd": 0,
> "file": "/home/kchiang/kvmimages/xpsp2_b-02222012.qc2",
> "encryption_key_missing": false}, "type": "unknown"}]}
>
> am I missing anything else?
>
> I've also tried rebooting the VM and running rescan-scsi-bus to no avail.
>
> Ken
>
> On Sat, Oct 11, 2014 at 10:58:59AM +0200, Markus Armbruster wrote:
> > Ken Chiang <kchi...@sandia.gov> writes:
> >
> > > Hello,
> > >
> > > I am trying to add a block device dynamically using qmp and are
> > > having some issues.
> > >
> > > After successfully adding the block device using "blockdev-add"
> > > and verifying that it has been added using "query-block", I am
> > > unable to see the block device in the VM under /dev/sdXX
> >
> > Block devices consist of a frontend (a.k.a. device model) and a backend.
> > You added only a backend. To add the frontend, use device_add.
> >
> > > I am using ubuntu14.04LTS: qmp version:
> > > {"QMP": {"version": {"qemu": {"micro": 0, "minor": 0, "major": 2},
> > > "package": " (Debian 2.0.0+dfsg-2ubuntu1.2)"}, "capabilities":
> > > []}}
> > >
> > > Here's what I am doing:
> > > 1. /usr/bin/kvm-spice -hda kvmimages/ubuntu.image -m 768
> > > -usbdevice tablet -vnc :5 -qmp tcp:localhost:4444,server,nowait
> > >
> > > 2. telnet localhost 4444
> > >
> > > 3. In the telnet session run:
> > > {"execute":"qmp_capabilities"}
> > > {"return": {}}
> > > { "execute": "blockdev-add",
> > > "arguments": { "options" : {
> > > "id": "disk1",
> > > "driver": "qcow2",
> > > "file": { "driver": "file",
> > > "filename": "testvm.qc2" } } } }
> > > {"return": {}}
> > >
> > > { "execute": "query-block" }
> > >
> > > 4. query-block returns the device "disk1", but when I check the vm:
> > > # vncviewer :5
> > >
> > > there are no new devices.
> >
> > For a virtio-blk disk, try:
> >
> > { "execute": "device_add", "arguments": {
> > "driver": "virtio-blk-pci", "id": "vda", "drive": "disk1" }
> > }
> >
> > For a SCSI disk, try:
> >
> > { "execute": "device_add", "arguments": {
> > "driver": "virtio-scsi-pci", "id": "vs-hba" } }
> > { "execute": "device_add", "arguments": {
> > "driver": "scsi-disk", "id": "sda", "drive": "disk1",
> > "bus": "vs-hba.0" } }
> >
> > [...]
>
> --
> Ken Chiang
> Information Assurance
> Sandia National Labs - CA
> 925-294-2018
