nbd.txt

==================================NBD==================================                                             
QEMU supports NBD (Network Block Devices) both using TCP protocol as well as Unix Domain Sockets.
Syntax for specifying a NBD device using TCP "nbd:<server-ip>:<port>[:exportname=<export>]"
Example for TCP:
qemu-system-i386 --drive file=nbd:192.0.2.1:30000
Syntax for specifying a NBD device using Unix Domain Sockets "nbd:unix:<domain-socket>[:exportname=<export>]"
Example for Unix Domain Sockets:
qemu-system-i386 --drive file=nbd:unix:/tmp/nbd-socket

(qemu) ? nbd_server_add 
nbd_server_add nbd_server_add [-w] device -- export a block device via NBD
(qemu) ? nbd_server_start 
nbd_server_start nbd_server_start [-a] [-w] host:port -- serve block devices on the given host and port
(qemu) ? nbd_server_stop 
nbd_server_stop nbd_server_stop -- stop serving block devices using the NBD protocol


{"name": "nbd-server-add"}
{"name": "nbd-server-start"}
{"name": "nbd-server-stop"}

https://tcms.engineering.redhat.com/run/64789/#caserun_2636423

https://bugzilla.redhat.com/show_bug.cgi?id=875871