2008-05-27 23:13:40 +02:00
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@example
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@c man begin SYNOPSIS
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2016-01-05 08:33:31 +01:00
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@command{qemu-nbd} [OPTION]... @var{filename}
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@command{qemu-nbd} @option{-d} @var{dev}
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2008-05-27 23:13:40 +02:00
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@c man end
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@end example
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@c man begin DESCRIPTION
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2016-01-05 08:33:31 +01:00
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Export a QEMU disk image using the NBD protocol.
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2008-05-27 23:13:40 +02:00
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@c man end
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@c man begin OPTIONS
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2016-01-05 08:33:31 +01:00
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@var{filename} is a disk image filename.
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@var{dev} is an NBD device.
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2008-09-22 22:41:57 +02:00
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@table @option
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2016-02-10 19:41:00 +01:00
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@item --object type,id=@var{id},...props...
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Define a new instance of the @var{type} object class identified by @var{id}.
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See the @code{qemu(1)} manual page for full details of the properties
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2016-02-10 19:41:13 +01:00
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supported. The common object types that it makes sense to define are the
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2016-02-10 19:41:00 +01:00
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@code{secret} object, which is used to supply passwords and/or encryption
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2016-02-10 19:41:13 +01:00
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keys, and the @code{tls-creds} object, which is used to supply TLS
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credentials for the qemu-nbd server.
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2008-09-22 22:41:57 +02:00
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@item -p, --port=@var{port}
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2016-01-05 08:33:32 +01:00
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The TCP port to listen on (default @samp{10809})
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2008-09-22 22:41:57 +02:00
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@item -o, --offset=@var{offset}
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2016-01-05 08:33:32 +01:00
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The offset into the image
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2008-09-22 22:41:57 +02:00
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@item -b, --bind=@var{iface}
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2016-01-05 08:33:32 +01:00
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The interface to bind to (default @samp{0.0.0.0})
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2008-09-22 22:41:57 +02:00
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@item -k, --socket=@var{path}
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2016-01-05 08:33:30 +01:00
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Use a unix socket with path @var{path}
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2016-01-05 08:33:31 +01:00
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@item -f, --format=@var{fmt}
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2016-01-05 08:33:32 +01:00
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Force the use of the block driver for format @var{fmt} instead of
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2016-01-05 08:33:31 +01:00
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auto-detecting
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2008-05-27 23:13:40 +02:00
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@item -r, --read-only
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2016-01-05 08:33:32 +01:00
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Export the disk as read-only
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2008-09-22 22:41:57 +02:00
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@item -P, --partition=@var{num}
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2016-01-05 08:33:32 +01:00
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Only expose partition @var{num}
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2008-07-03 13:47:46 +02:00
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@item -s, --snapshot
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2016-01-05 08:33:32 +01:00
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Use @var{filename} as an external snapshot, create a temporary
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2016-01-05 08:33:30 +01:00
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file with backing_file=@var{filename}, redirect the write to
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the temporary one
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2013-12-04 10:10:55 +01:00
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@item -l, --load-snapshot=@var{snapshot_param}
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2016-01-05 08:33:32 +01:00
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Load an internal snapshot inside @var{filename} and export it
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2016-01-05 08:33:30 +01:00
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as an read-only device, @var{snapshot_param} format is
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'snapshot.id=[ID],snapshot.name=[NAME]' or '[ID_OR_NAME]'
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2008-07-03 13:47:46 +02:00
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@item -n, --nocache
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2013-02-08 13:19:07 +01:00
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@itemx --cache=@var{cache}
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2016-01-05 08:33:32 +01:00
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The cache mode to be used with the file. See the documentation of
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2016-01-05 08:33:30 +01:00
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the emulator's @code{-drive cache=...} option for allowed values.
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2013-02-08 13:19:07 +01:00
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@item --aio=@var{aio}
|
2016-01-05 08:33:32 +01:00
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Set the asynchronous I/O mode between @samp{threads} (the default)
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2016-01-05 08:33:30 +01:00
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and @samp{native} (Linux only).
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2013-02-08 14:06:13 +01:00
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@item --discard=@var{discard}
|
2016-01-05 08:33:32 +01:00
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Control whether @dfn{discard} (also known as @dfn{trim} or @dfn{unmap})
|
2016-01-05 08:33:31 +01:00
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requests are ignored or passed to the filesystem. @var{discard} is one of
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@samp{ignore} (or @samp{off}), @samp{unmap} (or @samp{on}). The default is
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@samp{ignore}.
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@item --detect-zeroes=@var{detect-zeroes}
|
2016-01-05 08:33:32 +01:00
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Control the automatic conversion of plain zero writes by the OS to
|
2016-01-05 08:33:31 +01:00
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driver-specific optimized zero write commands. @var{detect-zeroes} is one of
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@samp{off}, @samp{on} or @samp{unmap}. @samp{unmap}
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converts a zero write to an unmap operation and can only be used if
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@var{discard} is set to @samp{unmap}. The default is @samp{off}.
|
2010-03-03 16:18:43 +01:00
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@item -c, --connect=@var{dev}
|
2016-01-05 08:33:32 +01:00
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Connect @var{filename} to NBD device @var{dev}
|
2008-07-03 12:23:51 +02:00
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@item -d, --disconnect
|
2016-01-05 08:33:32 +01:00
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Disconnect the device @var{dev}
|
2008-09-22 22:41:57 +02:00
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@item -e, --shared=@var{num}
|
2016-01-05 08:33:32 +01:00
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Allow up to @var{num} clients to share the device (default @samp{1})
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2008-07-03 15:41:03 +02:00
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@item -t, --persistent
|
2016-01-05 08:33:32 +01:00
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Don't exit on the last connection
|
2016-02-10 19:41:08 +01:00
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@item -x NAME, --export-name=NAME
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Set the NBD volume export name. This switches the server to use
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the new style NBD protocol negotiation
|
2016-02-10 19:41:13 +01:00
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@item --tls-creds=ID
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Enable mandatory TLS encryption for the server by setting the ID
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of the TLS credentials object previously created with the --object
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option.
|
2008-05-27 23:13:40 +02:00
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@item -v, --verbose
|
2016-01-05 08:33:32 +01:00
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Display extra debugging information
|
2008-05-27 23:13:40 +02:00
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@item -h, --help
|
2016-01-05 08:33:32 +01:00
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Display this help and exit
|
2008-05-27 23:13:40 +02:00
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|
@item -V, --version
|
2016-01-05 08:33:32 +01:00
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|
|
Display version information and exit
|
2008-05-27 23:13:40 +02:00
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@end table
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@c man end
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@ignore
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@setfilename qemu-nbd
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|
@settitle QEMU Disk Network Block Device Server
|
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@c man begin AUTHOR
|
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Copyright (C) 2006 Anthony Liguori <anthony@codemonkey.ws>.
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|
This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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@c man end
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@c man begin SEEALSO
|
2016-01-05 08:33:31 +01:00
|
|
|
qemu(1), qemu-img(1)
|
2008-05-27 23:13:40 +02:00
|
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@c man end
|
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@end ignore
|