iotests: Replace IMGOPTS= by -o

Tests should not overwrite all user-supplied image options, but only add
to it (which will effectively overwrite conflicting values).  Accomplish
this by passing options to _make_test_img via -o instead of $IMGOPTS.

For some tests, there is no functional change because they already only
appended options to IMGOPTS.  For these, this patch is just a
simplification.

For others, this is a change, so they now heed user-specified $IMGOPTS.
Some of those tests do not work with all image options, though, so we
need to disable them accordingly.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-id: 20191107163708.833192-12-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/qemu-iotests/220 b/tests/qemu-iotests/220
index 15159270d3..3f86f24c4d 100755
--- a/tests/qemu-iotests/220
+++ b/tests/qemu-iotests/220
@@ -37,6 +37,8 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 _supported_fmt qcow2
 _supported_proto file
 _supported_os Linux
+# To use a different refcount width but 16 bits we need compat=1.1
+_unsupported_imgopts 'compat=0.10'
 
 echo "== Creating huge file =="
 
@@ -44,7 +46,7 @@ echo "== Creating huge file =="
 # of a HUGE (but very sparse) file.  tmpfs works, ext4 does not.
 _require_large_file 513T
 
-IMGOPTS='cluster_size=2M,refcount_bits=1' _make_test_img 513T
+_make_test_img -o 'cluster_size=2M,refcount_bits=1' 513T
 
 echo "== Populating refcounts =="
 # We want an image with 256M refcounts * 2M clusters = 512T referenced.