Re: [Qemu-devel] [PATCH 6/9] vhost-scsi: new device supporting the tcm_vhost Linux kernel module

[Asias He]

On Tue, May 28, 2013 at 10:01:14AM +0200, Paolo Bonzini wrote:
> Il 28/05/2013 09:13, Wenchao Xia ha scritto:
> >> > From: Nicholas Bellinger <address@hidden>
> >> > 
> >> > 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 The tgpt field of the SET_ENDPOINT ioctl is obsolete now, so it is not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

For me, I always use targetcli utils instead of the sysfs interface.
targetcli in F18 has vhost support now.

-- 
Asias