docs: Update preferred NBD device syntax

Mention the preferred URI form, especially since NBD is trying to
standardize that form: https://lists.debian.org/nbd/2019/06/msg00012.html

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190903145634.20237-1-eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Eric Blake 2019-09-03 09:56:34 -05:00
parent 294682cc3a
commit 0c61ebb0cd

View File

@ -297,9 +297,16 @@ qemu-system-i386 -drive file=iscsi://192.0.2.1/iqn.2001-04.com.example/1
@item NBD
QEMU supports NBD (Network Block Devices) both using TCP protocol as well
as Unix Domain Sockets.
as Unix Domain Sockets. With TCP, the default port is 10809.
Syntax for specifying a NBD device using TCP
Syntax for specifying a NBD device using TCP, in preferred URI form:
``nbd://<server-ip>[:<port>]/[<export>]''
Syntax for specifying a NBD device using Unix Domain Sockets; remember
that '?' is a shell glob character and may need quoting:
``nbd+unix:///[<export>]?socket=<domain-socket>''
Older syntax that is also recognized:
``nbd:<server-ip>:<port>[:exportname=<export>]''
Syntax for specifying a NBD device using Unix Domain Sockets