[PATCH 2/6] iotests: Skip test 079 if it is not possible to create large files

[Thomas Huth <thuth@redhat.com>]

Test 079 fails in the arm64, s390x and ppc64le LXD containers, which
apparently do not allow large files to be created. Test 079 tries to
create a 4G sparse file, so check first whether we can really create
such files before executing the test.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/qemu-iotests/079 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tests/qemu-iotests/079 b/tests/qemu-iotests/079
index 81f0c21f53..e9b81419b7 100755
--- a/tests/qemu-iotests/079
+++ b/tests/qemu-iotests/079
@@ -39,6 +39,12 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 _supported_fmt qcow2
 _supported_proto file nfs
 
+# Some containers (e.g. non-x86 on Travis) do not allow large files
+if ! truncate --size=4G "$TEST_IMG"; then
+    _notrun "file system on $TEST_DIR does not support large enough files"
+fi
+rm "$TEST_IMG"
+
 echo "=== Check option preallocation and cluster_size ==="
 echo
 cluster_sizes="16384 32768 65536 131072 262144 524288 1048576 2097152 4194304"
-- 
2.23.0