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[Qemu-block] [PATCH] qemu-img: Document --force-share / -U

From: Fam Zheng
Subject: [Qemu-block] [PATCH] qemu-img: Document --force-share / -U
Date: Thu, 7 Dec 2017 16:44:53 +0800

Signed-off-by: Fam Zheng <address@hidden>
 qemu-img.texi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/qemu-img.texi b/qemu-img.texi
index fdcf120f36..3aa63aad55 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -57,6 +57,14 @@ 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.
address@hidden --force-share (-U)
+If specified, qemu-img will open the image with shared permissions, which makes
+it less likely to conflict with a running guest's permissions due to image
+locking. 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 result because of concurrent metadata changes, etc..
 @item fmt
 is the disk image format. It is guessed automatically in most cases. See below
 for a description of the supported disk formats.

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