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[Xen-devel] [PATCH] Allow blktap to be able to be booted as system volum

To: "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] [PATCH] Allow blktap to be able to be booted as system volume for PV-on-HVM(TAKE 2)
From: "Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx>
Date: Thu, 12 Jul 2007 09:13:58 +0900
Delivery-date: Wed, 11 Jul 2007 17:12:08 -0700
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Hi All,

I sent the patch to make blktap work with PV-on-HVM.
For system volume to boot hda or xvda,
I corrected the patch.

Signed-off-by: Takanori Kasai <kasai.takanori@xxxxxxxxxxxxxx>

This patch made it possible to use either.

disk = [ 'tap:aio:/xen/test/rhel5ga_full.img,hda,w' ]
or
disk = [ 'tap:aio:/xen/test/rhel5ga_full.img,xvda,w' ]

It is assumed that hda is a volume of the system
if both xvda and hda are specified.

disk = [ 'file:/xen/test/rhel5ga_full.img,hda,w',
        'tap:aio:/xen/test/drive2.img,xvda,w' ]

Best Regards,

--
Takanori Kasai


----- Original Message ----- From: "Kasai Takanori" <kasai.takanori@xxxxxxxxxxxxxx>
To: "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Sent: Friday, July 06, 2007 7:50 PM
Subject: [Xen-devel] [PATCH] Allow blktap to be able to be booted as systemvolume for PV-on-HVM


Hi All,

We were testing the PV driver on the HVM domain.
When blktap was booting system volume, PV-on-HVM domain was not able to be
started.

The configuration file is specified as follows.
disk = [ 'tap:aio:/xen/test/rhel5ga_full.img,hda,w' ]

The error occurred by the initialization of system volume in qemu-dm.

qemu: could not open hard disk image 'aio:/xen/test/rhel5ga_full.img'

It is because "aio:" is added to the head of params in xenstore.
However, qemu-dm open device by params.

This patch corrected the problem of params on the qemu-dm.

Signed-off-by: Takanori Kasai <kasai.takanori@xxxxxxxxxxxxxx>
Signed-off-by: Tomonari Horikoshi <t.horikoshi@xxxxxxxxxxxxxx>
Signed-off-by: Tsunehisa Doi <Doi.Tsunehisa@xxxxxxxxxxxxxx>

The execution result is as follows.

# xm create -f rhel5ga_vti.conf
Using config file "./rhel5ga_vti.conf".
Started domain RHEL5GA-test2
# xm block-list RHEL5GA-test2
Vdev  BE handle state evt-ch ring-ref BE-path
768    0    0     1      -1     -1    /local/domain/0/backend/tap/75/768
...      <<= /* Waiting for booting process */
# xm block-list RHEL5GA-test2
Vdev  BE handle state evt-ch ring-ref BE-path
768    0    0     4      7      8     /local/domain/0/backend/tap/75/768

Best Regards,

Attachment: allow-blktap-system-volume-2.patch
Description: Binary data

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