tests: qemublock: Add test for checkpoint deletion bitmap merge

Add test infrastructure and a basic test for bitmap deletion.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

tests/qemublocktest.c

@@ -27,6 +27,7 @@
 #include "qemu/qemu_qapi.h"
 #include "qemu/qemu_monitor_json.h"
 #include "qemu/qemu_backup.h"
+#include "qemu/qemu_checkpoint.h"
 
 #include "qemu/qemu_command.h"
 
@@ -700,6 +701,50 @@ testQemuBackupIncrementalBitmapCalculate(const void *opaque)
 }
 
 
+static const char *checkpointDeletePrefix = "qemublocktestdata/checkpointdelete/";
+
+struct testQemuCheckpointDeleteMergeData {
+    const char *name;
+    virStorageSourcePtr chain;
+    const char *deletebitmap;
+    const char *parentbitmap;
+};
+
+
+static int
+testQemuCheckpointDeleteMerge(const void *opaque)
+{
+    const struct testQemuCheckpointDeleteMergeData *data = opaque;
+    g_autofree char *actual = NULL;
+    g_autofree char *expectpath = NULL;
+    g_autoptr(virJSONValue) actions = NULL;
+    bool currentcheckpoint;
+
+    expectpath = g_strdup_printf("%s/%s%s-out.json", abs_srcdir,
+                                 checkpointDeletePrefix, data->name);
+
+    if (!(actions = virJSONValueNewArray()))
+        return -1;
+
+    /* hack to get the 'current' state until the function stops accepting it */
+    currentcheckpoint = STREQ("current", data->deletebitmap);
+
+    if (qemuCheckpointDiscardDiskBitmaps(data->chain,
+                                         data->deletebitmap,
+                                         data->parentbitmap,
+                                         currentcheckpoint,
+                                         actions) < 0) {
+        VIR_TEST_VERBOSE("failed to generate checkpoint delete transaction\n");
+        return -1;
+    }
+
+    if (!(actual = virJSONValueToString(actions, true)))
+        return -1;
+
+    return virTestCompareToFile(actual, expectpath);
+}
+
+
 static int
 mymain(void)
 {
@@ -709,6 +754,7 @@ mymain(void)
     struct testQemuDiskXMLToJSONData diskxmljsondata;
     struct testQemuImageCreateData imagecreatedata;
     struct testQemuBackupIncrementalBitmapCalculateData backupbitmapcalcdata;
+    struct testQemuCheckpointDeleteMergeData checkpointdeletedata;
     char *capslatest_x86_64 = NULL;
     virQEMUCapsPtr caps_x86_64 = NULL;
     g_autoptr(virStorageSource) bitmapSourceChain = NULL;
@@ -945,6 +991,19 @@ mymain(void)
     TEST_BACKUP_BITMAP_CALCULATE("snapshot-intermediate", bitmapSourceChain, "d", "snapshots");
     TEST_BACKUP_BITMAP_CALCULATE("snapshot-deep", bitmapSourceChain, "a", "snapshots");
 
+#define TEST_CHECKPOINT_DELETE_MERGE(testname, delbmp, parbmp) \
+    do { \
+        checkpointdeletedata.name = testname; \
+        checkpointdeletedata.chain = bitmapSourceChain; \
+        checkpointdeletedata.deletebitmap = delbmp; \
+        checkpointdeletedata.parentbitmap = parbmp; \
+        if (virTestRun("checkpoint delete " testname, \
+                       testQemuCheckpointDeleteMerge, &checkpointdeletedata) < 0) \
+        ret = -1; \
+    } while (0)
+
+    TEST_CHECKPOINT_DELETE_MERGE("basic-noparent", "a", NULL);
+
  cleanup:
     virHashFree(diskxmljsondata.schema);
     qemuTestDriverFree(&driver);

tests/qemublocktestdata/checkpointdelete/basic-noparent-out.json

+[
+  {
+    "type": "block-dirty-bitmap-remove",
+    "data": {
+      "node": "libvirt-1-format",
+      "name": "a"
+    }
+  }
+]