tests/migration: Add test for QTAILQ migration

Add a test for QTAILQ migration to tests/test-vmstate.c.

Signed-off-by: Jianjun Duan <duanj@linux.vnet.ibm.com>
Message-Id: <1484852453-12728-4-git-send-email-duanj@linux.vnet.ibm.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

tests/test-vmstate.c

@@ -544,6 +544,150 @@ static void test_arr_ptr_str_no0_load(void)
     }
 }
 
+/* test QTAILQ migration */
+typedef struct TestQtailqElement TestQtailqElement;
+
+struct TestQtailqElement {
+    bool     b;
+    uint8_t  u8;
+    QTAILQ_ENTRY(TestQtailqElement) next;
+};
+
+typedef struct TestQtailq {
+    int16_t  i16;
+    QTAILQ_HEAD(TestQtailqHead, TestQtailqElement) q;
+    int32_t  i32;
+} TestQtailq;
+
+static const VMStateDescription vmstate_q_element = {
+    .name = "test/queue-element",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_BOOL(b, TestQtailqElement),
+        VMSTATE_UINT8(u8, TestQtailqElement),
+        VMSTATE_END_OF_LIST()
+    },
+};
+
+static const VMStateDescription vmstate_q = {
+    .name = "test/queue",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT16(i16, TestQtailq),
+        VMSTATE_QTAILQ_V(q, TestQtailq, 1, vmstate_q_element, TestQtailqElement,
+                         next),
+        VMSTATE_INT32(i32, TestQtailq),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+uint8_t wire_q[] = {
+    /* i16 */                     0xfe, 0x0,
+    /* start of element 0 of q */ 0x01,
+    /* .b  */                     0x01,
+    /* .u8 */                     0x82,
+    /* start of element 1 of q */ 0x01,
+    /* b */                       0x00,
+    /* u8 */                      0x41,
+    /* end of q */                0x00,
+    /* i32 */                     0x00, 0x01, 0x11, 0x70,
+    QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
+};
+
+static void test_save_q(void)
+{
+    TestQtailq obj_q = {
+        .i16 = -512,
+        .i32 = 70000,
+    };
+
+    TestQtailqElement obj_qe1 = {
+        .b = true,
+        .u8 = 130,
+    };
+
+    TestQtailqElement obj_qe2 = {
+        .b = false,
+        .u8 = 65,
+    };
+
+    QTAILQ_INIT(&obj_q.q);
+    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
+    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);
+
+    save_vmstate(&vmstate_q, &obj_q);
+    compare_vmstate(wire_q, sizeof(wire_q));
+}
+
+static void test_load_q(void)
+{
+    TestQtailq obj_q = {
+        .i16 = -512,
+        .i32 = 70000,
+    };
+
+    TestQtailqElement obj_qe1 = {
+        .b = true,
+        .u8 = 130,
+    };
+
+    TestQtailqElement obj_qe2 = {
+        .b = false,
+        .u8 = 65,
+    };
+
+    QTAILQ_INIT(&obj_q.q);
+    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
+    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);
+
+    QEMUFile *fsave = open_test_file(true);
+
+    qemu_put_buffer(fsave, wire_q, sizeof(wire_q));
+    g_assert(!qemu_file_get_error(fsave));
+    qemu_fclose(fsave);
+
+    QEMUFile *fload = open_test_file(false);
+    TestQtailq tgt;
+
+    QTAILQ_INIT(&tgt.q);
+    vmstate_load_state(fload, &vmstate_q, &tgt, 1);
+    char eof = qemu_get_byte(fload);
+    g_assert(!qemu_file_get_error(fload));
+    g_assert_cmpint(tgt.i16, ==, obj_q.i16);
+    g_assert_cmpint(tgt.i32, ==, obj_q.i32);
+    g_assert_cmpint(eof, ==, QEMU_VM_EOF);
+
+    TestQtailqElement *qele_from = QTAILQ_FIRST(&obj_q.q);
+    TestQtailqElement *qlast_from = QTAILQ_LAST(&obj_q.q, TestQtailqHead);
+    TestQtailqElement *qele_to = QTAILQ_FIRST(&tgt.q);
+    TestQtailqElement *qlast_to = QTAILQ_LAST(&tgt.q, TestQtailqHead);
+
+    while (1) {
+        g_assert_cmpint(qele_to->b, ==, qele_from->b);
+        g_assert_cmpint(qele_to->u8, ==, qele_from->u8);
+        if ((qele_from == qlast_from) || (qele_to == qlast_to)) {
+            break;
+        }
+        qele_from = QTAILQ_NEXT(qele_from, next);
+        qele_to = QTAILQ_NEXT(qele_to, next);
+    }
+
+    g_assert_cmpint((uintptr_t) qele_from, ==, (uintptr_t) qlast_from);
+    g_assert_cmpint((uintptr_t) qele_to, ==, (uintptr_t) qlast_to);
+
+    /* clean up */
+    TestQtailqElement *qele;
+    while (!QTAILQ_EMPTY(&tgt.q)) {
+        qele = QTAILQ_LAST(&tgt.q, TestQtailqHead);
+        QTAILQ_REMOVE(&tgt.q, qele, next);
+        free(qele);
+        qele = NULL;
+    }
+    qemu_fclose(fload);
+}
+
 int main(int argc, char **argv)
 {
     temp_fd = mkstemp(temp_file);
@@ -562,6 +706,9 @@ int main(int argc, char **argv)
                     test_arr_ptr_str_no0_save);
     g_test_add_func("/vmstate/array/ptr/str/no0/load",
                     test_arr_ptr_str_no0_load);
+    g_test_add_func("/vmstate/qtailq/save/saveq", test_save_q);
+    g_test_add_func("/vmstate/qtailq/load/loadq", test_load_q);
+
     g_test_run();
 
     close(temp_fd);