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qemu-img: Document --force-share / -U

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Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kashyap Chamarthy <kchamart@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Fam Zheng 2018-02-09 13:29:14 +08:00 committed by Kevin Wolf
parent c150eb9292
commit a7e326df1c
1 changed files with 8 additions and 0 deletions
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qemu-img.texi
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@ -86,6 +86,14 @@ exclusive with the @var{-O} parameters. It is currently required to also use
the @var{-n} parameter to skip image creation. This restriction may be relaxed
in a future release.
@item --force-share (-U)
If specified, @code{qemu-img} will open the image in shared mode, allowing
other QEMU processes to open it in write mode. For example, this can be used to
get the image information (with 'info' subcommand) when the image is used by a
running guest. Note that this could produce inconsistent results because of
concurrent metadata changes, etc. This option is only allowed when opening
images in read-only mode.
@item --backing-chain
will enumerate information about backing files in a disk image chain. Refer
below for further description.