diff options
authoraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-03-28 17:55:19 +0000
committeraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-03-28 17:55:19 +0000
commit9230eaf6797ffce465aef2a6c5b26d605c162a24 (patch)
tree7ab0a286bd63e6715cc7eb13b6e6921464055ce8 /qemu-img.texi
parentblock-qcow2: keep backing file format in a qcow2 extension (Uri Lublin) (diff)
qemu-img: adding a "-F base_fmt" option to "qemu-img create -b" (Uri Lublin)
If the user specifies the backing file format, then when opening the backing file, there is no need to probe the (backing file) image to figure out its format. This follows my previous patches implementing bdrv_create2 which keeps (for qcow2 only) the backing file format as a qcow2-extension Suggested by Daniel P. Berrange. Signed-off-by: Uri Lublin <> Signed-off-by: Anthony Liguori <> git-svn-id: svn:// c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'qemu-img.texi')
1 files changed, 3 insertions, 1 deletions
diff --git a/qemu-img.texi b/qemu-img.texi
index a40f84168..deef2ab62 100644
--- a/qemu-img.texi
+++ b/qemu-img.texi
@@ -8,7 +8,7 @@ usage: qemu-img command [command options]
The following commands are supported:
@table @option
-@item create [-e] [-6] [-b @var{base_image}] [-f @var{fmt}] @var{filename} [@var{size}]
+@item create [-e] [-6] [-F @var{base_fmt}] [-b @var{base_image}] [-f @var{fmt}] @var{filename} [@var{size}]
@item commit [-f @var{fmt}] @var{filename}
@item convert [-c] [-e] [-6] [-f @var{fmt}] [-O @var{output_fmt}] [-B @var{output_base_image}] @var{filename} [@var{filename2} [...]] @var{output_filename}
@item info [-f @var{fmt}] @var{filename}
@@ -27,6 +27,8 @@ forces the output image to be created as a copy on write
image of the specified base image; @code{output_base_image} should have the same
content as the input's base image, however the path, image format, etc may
+@item base_fmt
+is the disk image format of @var{base_image}. for more information look at @var{fmt}
@item fmt
is the disk image format. It is guessed automatically in most cases. The following formats are supported: