δΊ 2013-6-20 9:33, Asias He ει:
On Wed, Jun 19, 2013 at 12:55:10PM +0000, Libaiqing wrote:
Hi paolo,
The vhost-scsi device can be used as boot device?
I tested with your config + 3.10 rc6 + seabios 1.7.2.2,but failed.
Could you give me some advise to debug this problem ? I can provide more
information if need.
Boot from vhost-scsi is supposed to work. The seabios you used should be
fine which contains the fixes for vhost-scsi.
Instead of playing with the /sys/kernel/config/target directly, I really
recommend using targetcli utils.
Nab, I think we really should write some docs for people to use
vhost-scsi.
A section in qemu-options.hx would be great, currently an example is
good enough to me.
This is how I install and use targetcli in RHEL6. Note you need upstream
kernel and qemu bits for vhost-scsi.
# yum groupinstall 'Development tools'
# yum install python-devel epydoc python-simpleparse
# git clone git://github.com/agrover/rtslib-fb.git
# git clone git://github.com/agrover/targetcli-fb.git
# git clone git://github.com/agrover/configshell-fb.git
# for i in rtslib-fb configshell-fb targetcli-fb; do
make -C $i rpm
yum localinstall $i/dist/*.noarch.rpm
done
In targetcli, create a backstore and vhost wwpn, e.g.
# targetcli
/> /backstores/ramdisk create r0 1g
/> /vhost create
/> cd /vhost/naa.500140527cb6616b/tpg1/luns
/> create /backstores/ramdisk/r0
# qemu -device vhost-scsi-pci,wwpn=naa.500140527cb6616b ...
Hope this helps.
Regards,
baiqing
-----Original Message-----
From: qemu-devel-bounces+libaiqing=huawei....@nongnu.org
[mailto:qemu-devel-bounces+libaiqing=huawei....@nongnu.org] On
Behalf Of Paolo Bonzini
Sent: Tuesday, May 28, 2013 4:01 PM
To: Wenchao Xia
Cc: as...@redhat.com; qemu-devel@nongnu.org; n...@linux-iscsi.org;
Michael S. Tsirkin
Subject: Re: [Qemu-devel] [PATCH 6/9] vhost-scsi: new device supporting the
tcm_vhost Linux kernel module
Il 28/05/2013 09:13, Wenchao Xia ha scritto:
From: Nicholas Bellinger <n...@linux-iscsi.org>
The WWPN specified in configfs is passed to "-device vhost-scsi-pci".
The tgpt field of the SET_ENDPOINT ioctl is obsolete now, so it is not
available from the QEMU command-line. Instead, I hardcode it to
zero.
Hi, Paolo
Any document about how to config it correctly in configfs, before
invoking qemu with the WWPN number?
Unfortunately no, but vhost-scsi doesn't have many knobs (unlike
iSCSI for example) so it's quite simple. Here is an example:
cd /sys/kernel/config/target
mkdir -p core/fileio_0/fileio
echo 'fd_dev_name=/home/pbonzini/test.img,fd_dev_size=5905580032' >
core/fileio_0/fileio/control
echo 1 > core/fileio_0/fileio/enable
mkdir -p vhost/naa.600140554cf3a18e/tpgt_0/lun/lun_0
cd vhost/naa.600140554cf3a18e/tpgt_0
ln -sf ../../../../../core/fileio_0/fileio/ lun/lun_0/virtual_scsi_port
echo naa.60014053226f0388 > nexus
The "nexus" value is the initiator WWN. naa.600140554cf3a18e is the
target WWN that you have to pass to "-device vhost-scsi-pci".
Paolo
--
Best Regards
Wenchao Xia
