[Qemu-devel] [PATCH RFC for-2.6 2/3] tests: Add test code for meta bitmap

[Fam Zheng <famz@redhat.com>]

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 tests/test-hbitmap.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/tests/test-hbitmap.c b/tests/test-hbitmap.c
index abcea0c..6ab9101 100644
--- a/tests/test-hbitmap.c
+++ b/tests/test-hbitmap.c
@@ -23,6 +23,7 @@
 
 typedef struct TestHBitmapData {
     HBitmap       *hb;
+    HBitmap       *meta;
     unsigned long *bits;
     size_t         size;
     size_t         old_size;
@@ -94,6 +95,13 @@ static void hbitmap_test_init(TestHBitmapData *data,
     }
 }
 
+static void hbitmap_test_init_meta(TestHBitmapData *data,
+                                   uint64_t size, int granularity)
+{
+    hbitmap_test_init(data, size, granularity);
+    data->meta = hbitmap_create_meta(data->hb);
+}
+
 static inline size_t hbitmap_test_array_size(size_t bits)
 {
     size_t n = (bits + BITS_PER_LONG - 1) / BITS_PER_LONG;
@@ -637,6 +645,69 @@ static void test_hbitmap_truncate_shrink_large(TestHBitmapData *data,
     hbitmap_test_truncate(data, size, -diff, 0);
 }
 
+static void hbitmap_check_meta(TestHBitmapData *data,
+                               int64_t start, int count)
+{
+    int64_t i;
+
+    for (i = 0; i < data->size; i++) {
+        if (i >= start && i < start + count) {
+            g_assert(hbitmap_get(data->meta, i));
+        } else {
+            g_assert(!hbitmap_get(data->meta, i));
+        }
+    }
+}
+
+static void hbitmap_test_meta(TestHBitmapData *data, int64_t start, int count)
+{
+    hbitmap_reset_all(data->hb);
+    hbitmap_reset_all(data->meta);
+
+    /* Test "unset" -> "unset" will not update meta. */
+    hbitmap_reset(data->hb, start, count);
+    hbitmap_check_meta(data, 0, 0);
+
+    /* Test "unset" -> "set" will update meta */
+    hbitmap_set(data->hb, start, count);
+    hbitmap_check_meta(data, start, count);
+
+    /* Test "set" -> "set" will not update meta */
+    hbitmap_reset_all(data->meta);
+    hbitmap_set(data->hb, start, count);
+    hbitmap_check_meta(data, 0, 0);
+
+    /* Test "set" -> "unset" will update meta */
+    hbitmap_reset_all(data->meta);
+    hbitmap_reset(data->hb, start, count);
+    hbitmap_check_meta(data, start, count);
+}
+
+/**
+ * Create an HBitmap and test set/unset.
+ */
+static void test_hbitmap_meta_basic(TestHBitmapData *data, const void *unused)
+{
+    int i;
+    int64_t offsets[] = {
+        0, 1, L1 - 1, L1, L1 + 1, L2 - 1, L2, L2 + 1, L3 - 1, L3, L3 + 1
+    };
+
+    hbitmap_test_init_meta(data, L3 * 2, 0);
+    for (i = 0; i < ARRAY_SIZE(offsets); i++) {
+        hbitmap_test_meta(data, offsets[i], 1);
+        hbitmap_test_meta(data, offsets[i], L1);
+        hbitmap_test_meta(data, offsets[i], L2);
+    }
+}
+
+static void test_hbitmap_meta_zero(TestHBitmapData *data, const void *unused)
+{
+    hbitmap_test_init_meta(data, 0, 0);
+
+    hbitmap_check_meta(data, 0, 0);
+}
+
 static void hbitmap_test_add(const char *testpath,
                                    void (*test_func)(TestHBitmapData *data, const void *user_data))
 {
@@ -686,6 +757,9 @@ int main(int argc, char **argv)
                      test_hbitmap_truncate_grow_large);
     hbitmap_test_add("/hbitmap/truncate/shrink/large",
                      test_hbitmap_truncate_shrink_large);
+
+    hbitmap_test_add("/hbitmap/meta/basic", test_hbitmap_meta_basic);
+    hbitmap_test_add("/hbitmap/meta/zero", test_hbitmap_meta_zero);
     g_test_run();
 
     return 0;
-- 
2.4.3