test: make homed test run in qemu

test/TEST-46-HOMED/test.sh

@@ -3,9 +3,23 @@
 set -e
 
 TEST_DESCRIPTION="testing homed"
-TEST_NO_QEMU=1
+
+# Skip the qemu version of the test, unless we have btrfs
+(modprobe -nv btrfs && command -v mkfs.btrfs) || TEST_NO_QEMU=1
 
 # shellcheck source=test/test-functions
 . "${TEST_BASE_DIR:?}/test-functions"
 
+# Need loop devices for mounting images
+test_append_files() {
+    (
+        if [ "$TEST_NO_QEMU" != "1" ] ; then
+            instmods loop =block
+            install_dmevent
+            install_btrfs
+            generate_module_dependencies
+        fi
+    )
+}
+
 do_test "$@"

test/units/testsuite-46.sh

@@ -26,7 +26,9 @@ inspect() {
 systemd-analyze log-level debug
 systemd-analyze log-target console
 
-NEWPASSWORD=xEhErW0ndafV4s homectl create test-user --disk-size=20M
+# we enable --luks-discard= since we run our tests in a tight VM, hence don't
+# needlessly pressure for storage
+NEWPASSWORD=xEhErW0ndafV4s homectl create test-user --disk-size=256M --luks-discard=yes
 inspect test-user
 
 PASSWORD=xEhErW0ndafV4s homectl authenticate test-user