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[Qemu-devel] [PATCH 0/2] Add serial number support for virtio_blk, V3
From: |
john cooper |
Subject: |
[Qemu-devel] [PATCH 0/2] Add serial number support for virtio_blk, V3 |
Date: |
Tue, 26 May 2009 20:26:37 -0400 |
User-agent: |
Thunderbird 2.0.0.9 (X11/20071115) |
[Rework of earlier patch, 2/2 modified to use
an existing interface]
This patch allows passing of a virtio_blk drive
serial number from qemu into a guest's virtio_blk
driver, and provides a means to access the serial
number from a guest's userspace.
Equivalent functionality currently exists for IDE
and SCSI, however it is not yet implemented for
virtio. Scenarios exist where guest code relies
on a unique drive serial number to correctly
identify the machine environment in which it
exists.
The following two patches implement the above:
qemu-vblk-serial-3.patch
which provides the qemu missing bits to interpret
a '-drive .. serial=XYZ ..' flag, and:
virtio_blk-serial-3.patch
which extracts this information and makes it
available to guest userspace via an HDIO_GET_IDENTITY
ioctl, eg: 'hdparm -i /dev/vda'.
The above patches are relative to qemu-kvm.git and
2.6.29.3 respectively.
-john
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