[Xen-changelog] [qemu-xen-unstable] qemu-img-xen: Fix cow creation with raw image backing files

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

commit be598c20435f39f2d71f4b3d8d0489dd9e3af4ba
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date:   Tue May 5 15:20:50 2009 +0100

    qemu-img-xen: Fix cow creation with raw image backing files
    
    Previously
      dd if=/dev/zero of=raw_image count=100
      ./qemu-img-xen create -b raw_image -f qcow2 cow_image
    would fail because it would attempt to autodetect the format of
    base_image.  With this change, it works.  However,
      ./qemu-img-xen create -b cow_image -f qcow2 cow_image_2
    will now fail because we now always expect the backing file to be raw.
    
    Thanks to Xin Li and Dongxiao Xu for the bug report.
    
    Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 qemu-img.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/qemu-img.c b/qemu-img.c
index efbb9b6..46e6351 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -199,7 +199,7 @@ static BlockDriverState *bdrv_new_open(const char *filename,
         if (!drv)
             error("Unknown file format '%s'", fmt);
     } else {
-        drv = NULL;
+        drv = &bdrv_raw;
     }
     if (bdrv_open2(bs, filename, BRDV_O_FLAGS, drv) < 0) {
         error("Could not open '%s'", filename);
--
generated by git-patchbot for /home/xen/git/qemu-xen-unstable.git

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