From dc4ab0291983d4d0df7c32566e45da42817a343a Mon Sep 17 00:00:00 2001
From: Max Reitz <mreitz@redhat.com>
Date: Thu, 25 Jun 2020 14:55:32 +0200
Subject: iotests/common.rc: Add _require_working_luks

That the luks driver is present is little indication on whether it is
actually working.  Without the crypto libraries linked in, it does not
work.  So add this function, which tries to create a luks image to see
whether that actually works.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200625125548.870061-4-mreitz@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 tests/qemu-iotests/common.rc | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index ba912555ca..f3667f48ab 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -740,6 +740,33 @@ _unsupported_imgopts()
     done
 }
 
+# Caution: Overwrites $TEST_DIR/t.luks
+_require_working_luks()
+{
+    file="$TEST_DIR/t.luks"
+
+    output=$(
+        $QEMU_IMG create -f luks \
+            --object secret,id=sec0,data=hunter0 \
+            -o key-secret=sec0 \
+            -o iter-time=10 \
+            "$file" \
+            1M \
+            2>&1
+    )
+    status=$?
+
+    IMGFMT='luks' _rm_test_img "$file"
+
+    if [ $status != 0 ]; then
+        reason=$(echo "$output" | grep "$file:" | $SED -e "s#.*$file: *##")
+        if [ -z "$reason" ]; then
+            reason="Failed to create a LUKS image"
+        fi
+        _notrun "$reason"
+    fi
+}
+
 # this test requires that a specified command (executable) exists
 #
 _require_command()
-- 
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