add host_device format description to qemu-img manpage

Converting files using "qemu-img convert" onto logical volumes (or any
block device) you need to use the currently undocumented "host_device"
format.  This patch adds the required documentation to the manpage.

Reported-by: Adrian Bridgett <adrian@bitcube.co.uk>
Signed-off-by: Adrian Bridgett <adrian@bitcube.co.uk>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/qemu-img.texi b/qemu-img.texi
index 69e24b598fd33b4de0a4a10b6a046acec4d6dd4c..ae8ca922e04e2017c7d30973fa1c524bd4440ca4 100644 (file)
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -37,6 +37,12 @@ Linux or NTFS on Windows), then only the written sectors will reserve
 space. Use @code{qemu-img info} to know the real size used by the
 image or @code{ls -ls} on Unix/Linux.
 
+@item host_device
+
+Host device format. This format should be used instead of raw when
+converting to block devices or other devices where "holes" are not
+supported.
+
 @item qcow2
 QEMU image format, the most versatile format. Use it to have smaller
 images (useful if your filesystem does not supports holes, for example