[adding libvirt list] On 9/3/19 1:50 PM, John Snow wrote: > > > On 9/3/19 10:56 AM, Eric Blake wrote: >> 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@xxxxxxxxxx> >> --- >> qemu-doc.texi | 16 +++++++++++----- >> 1 file changed, 11 insertions(+), 5 deletions(-) >> >> diff --git a/qemu-doc.texi b/qemu-doc.texi >> index 577d1e837640..c83fb347d77e 100644 >> --- a/qemu-doc.texi >> +++ b/qemu-doc.texi >> @@ -297,7 +297,14 @@ 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: > > Deprecated officially, or no? > >> ``nbd:<server-ip>:<port>[:exportname=<export>]'' >> >> -Syntax for specifying a NBD device using Unix Domain Sockets >> ``nbd:unix:<domain-socket>[:exportname=<export>]'' I didn't feel like starting a deprecation clock, in part because libvirt is still using nbd:host:port:exportname during migration, similarly code in virstoragefile.c is using only the old form. Do we want to start a deprecation (as a separate patch), to prod faster changes in libvirt in switching to the newer form where sensible? >> >> Example for TCP >> @example >> -qemu-system-i386 --drive file=nbd:192.0.2.1:30000 >> +qemu-system-i386 --drive file=nbd://192.0.2.1:30000 >> @end example >> >> Example for Unix Domain Sockets >> @example >> -qemu-system-i386 --drive file=nbd:unix:/tmp/nbd-socket >> +qemu-system-i386 --drive "file=nbd+unix:///?socket=/tmp/nbd-socket" >> @end example >> >> @item SSH >> > > Reviewed-by: John Snow <jsnow@xxxxxxxxxx> Thanks; will queue through my NBD tree (regardless of whether we decide I should add more patches to start a deprecation cycle). -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org
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