vhost_scsi would be like:
#1 making the module available:
$ sudo modprobe vhost_scsi
#2 some prework to set things up [1]
My disk:
/dev/disk/by-path/ccw-0.0.e000-fc-0x50050763060b16b6-lun-0x4024400a00000000
$ sudo targetcli
targetcli shell version 2.1.fb48
Copyright 2011-2013 by Datera, Inc and others.
For help on commands, type 'help'.
/> backstores/block create name=disk1
dev=/dev/disk/by-path/ccw-0.0.e000-fc-0x50050763060b16b6-lun-0x4024400a00000000
Created block storage object disk1 using
/dev/disk/by-path/ccw-0.0.e000-fc-0x50050763060b16b6-lun-0x4024400a00000000.
/> vhost/ create
Created target naa.50014054d8284df8.
Created TPG 1.
/> vhost/naa.50014054d8284df8/tpg1/luns create /backstores/block/disk1
Created LUN 0.
Then in libvirt:
<hostdev mode='subsystem' type='scsi_host' managed='no'>
<source protocol='vhost' wwpn='naa.50014054d8284df8'/>
</hostdev>
This again is mediated by libvirt and passed as FD
-device
vhost-scsi-ccw,wwpn=naa.50014054d8284df8,vhostfd=28,id=hostdev0,devno=fe.0.0007
-netdev tap,fd=26,id=hostnet0,vhost=on,vhostfd=27
Works without a rule:
$ sudo lsof -p 14118 +fg | grep vhost
qemu-syst 14118 libvirt-qemu 18u CHR RW,LG 10,241
0t0 503 /dev/vhost-vsock
qemu-syst 14118 libvirt-qemu 27u CHR RW,ND,LG 10,238
0t0 502 /dev/vhost-net
qemu-syst 14118 libvirt-qemu 28u CHR RW,LG 10,47
0t0 586 /dev/vhost-scsi
[1]: https://wiki.libvirt.org/page/Vhost-scsi_target
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https://bugs.launchpad.net/bugs/1815910
Title:
Apparmor blocks access to /dev/vhost-net
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