root@gizmo:~ # cbsd bstart lindesk
...
/usr/bin/lockf -s -t0 /tmp/bhyveload.lindesk.lock /usr/sbin/bhyve -c 1 -m 536870912 -H -A -s 0:0,hostbridge -s 6,virtio-9p,sharename=/tmp/share -s 1:0,ahci-cd,/usr/local/cbsd/upgrade/patch/efirefd.fd -s 2:0,virtio-blk,/usr/jails/jails-data/lindesk-data/dsk1.vhd,sectorsize=512 -s 3:0,ahci-cd,/usr/jails/src/iso/cbsd-iso-ubuntu-17.04-server-amd64.iso -s 4:0,virtio-net,tap2,mac=00:a0:98:6f:fc:be -s 5:0,virtio-rnd -s 7,fbuf,tcp=127.0.0.1:5900,w=1024,h=768,password=cbsd -s 30,xhci,tablet -s 31,lpc -l com1,stdio -l bootrom,/usr/local/cbsd/upgrade/patch/efi.fd lindesk
...

root@lindesk:~# mount |grep ^sharename
sharename on /mnt type 9p (rw,relatime,sync,dirsync,trans=virtio)

root@lindesk:~# df -h |grep sharename
sharename       2.0T   27M  2.0T   1% /mnt

root@lindesk:~# date > /mnt/date.txt

root@gizmo:~ # cat /tmp/share/date.txt
Wed Sep 27 00:51:38 MSK 2017