[Qemu-devel] [PATCH v6 2/2] qemu-img: Document --force-share / -U

[Fam Zheng <famz@redhat.com>]

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 qemu-img.texi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/qemu-img.texi b/qemu-img.texi
index 60a0e080c6..ec7e2f5d1e 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -86,6 +86,13 @@ 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
+concurrent writers. 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.
-- 
2.14.3