block: qemu-iotests for vhdx, read sample dynamic image

This adds the VHDX format to the qemu-iotests format, and adds
a read test.  The test reads from an existing sample image, that
was created with Hyper-V under Windwos Server 2012.

The image file is a 1GB dynamic image, with 32MB blocks.

The pattern 0xa5 exists from 0MB-33MB (past a block size boundary)

The pattern 0x96 exists from 33MB-66MB (past another block boundary,
and leaving a partial blank block)

From 66MB-1024MB, all reads should return 0.

Although 1GB dynamic image with 66MB of data, the bzip2'ed image
file size is only 874 bytes.

This also adds in the IMGFMT_GENERIC flag, so r/o images can be
tested (e.g. ./check -vhdx) without failing tests that assume
r/w support.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/qemu-iotests/common b/tests/qemu-iotests/common
index fecaf85..2932e14 100644
--- a/tests/qemu-iotests/common
+++ b/tests/qemu-iotests/common
@@ -45,6 +45,7 @@ valgrind=false
 rm -f $tmp.list $tmp.tmp $tmp.sed
 
 export IMGFMT=raw
+export IMGFMT_GENERIC=true
 export IMGPROTO=file
 export IMGOPTS=""
 export QEMU_IO_OPTIONS=""
@@ -133,6 +134,7 @@ check options
     -qed                test qed
     -vdi                test vdi
     -vpc                test vpc
+    -vhdx               test vhdx
     -vmdk               test vmdk
     -rbd                test rbd
     -sheepdog           test sheepdog
@@ -195,6 +197,12 @@ testlist options
             xpand=false
             ;;
 
+        -vhdx)
+            IMGFMT=vhdx
+            xpand=false
+            IMGFMT_GENERIC=false
+            ;;
+
         -rbd)
             IMGPROTO=rbd
             xpand=false