This adds a test case that the BlockDriver callbacks for drain are
called in bdrv_drained_all_begin/end(), and that both of them are called
exactly once.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
tests/test-bdrv-drain.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++++
tests/Makefile.include | 2 +
2 files changed, 139 insertions(+)
create mode 100644 tests/test-bdrv-drain.c
diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
new file mode 100644
index 0000000000..67541438c1
--- /dev/null
+++ b/tests/test-bdrv-drain.c
@@ -0,0 +1,137 @@
+/*
+ * Block node draining tests
+ *
+ * Copyright (c) 2017 Kevin Wolf <kw...@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "block/block.h"
+#include "sysemu/block-backend.h"
+#include "qapi/error.h"
+
+typedef struct BDRVTestState {
+ int drain_count;
+} BDRVTestState;
+
+static void coroutine_fn bdrv_test_co_drain_begin(BlockDriverState *bs)
+{
+ BDRVTestState *s = bs->opaque;
+ s->drain_count++;
+}
+
+static void coroutine_fn bdrv_test_co_drain_end(BlockDriverState *bs)
+{
+ BDRVTestState *s = bs->opaque;
+ s->drain_count--;
+}
+
+static void bdrv_test_close(BlockDriverState *bs)
+{
+ BDRVTestState *s = bs->opaque;
+ g_assert_cmpint(s->drain_count, >, 0);
+}
+
+static int coroutine_fn bdrv_test_co_preadv(BlockDriverState *bs,
+ uint64_t offset, uint64_t bytes,
+ QEMUIOVector *qiov, int flags)
+{
+ /* We want this request to stay until the polling loop in drain waits for
+ * it to complete. We need to sleep a while as bdrv_drain_invoke() comes
+ * first and polls its result, too, but it shouldn't accidentally complete
+ * this request yet. */
+ co_aio_sleep_ns(qemu_get_aio_context(), QEMU_CLOCK_REALTIME, 100000);
+
+ return 0;
+}
+
+static BlockDriver bdrv_test = {
+ .format_name = "test",
+ .instance_size = sizeof(BDRVTestState),
+
+ .bdrv_close = bdrv_test_close,
+ .bdrv_co_preadv = bdrv_test_co_preadv,
+
+ .bdrv_co_drain_begin = bdrv_test_co_drain_begin,
+ .bdrv_co_drain_end = bdrv_test_co_drain_end,
+};
+
+static void aio_ret_cb(void *opaque, int ret)
+{
+ int *aio_ret = opaque;
+ *aio_ret = ret;
+}
+
+static void test_drv_cb_drain_all(void)
+{
+ BlockBackend *blk;
+ BlockDriverState *bs;
+ BDRVTestState *s;
+ BlockAIOCB *acb;
+ int aio_ret;
+
+ QEMUIOVector qiov;
+ struct iovec iov = {
+ .iov_base = NULL,
+ .iov_len = 0,
+ };
+ qemu_iovec_init_external(&qiov, &iov, 1);
+
+ blk = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
+ bs = bdrv_new_open_driver(&bdrv_test, "test-node", BDRV_O_RDWR,
+ &error_abort);
+ s = bs->opaque;
+ blk_insert_bs(blk, bs, &error_abort);
+
+ /* Simple bdrv_drain_all_begin/end pair, check that CBs are called */
+ g_assert_cmpint(s->drain_count, ==, 0);
+ bdrv_drain_all_begin();
+ g_assert_cmpint(s->drain_count, ==, 1);
+ bdrv_drain_all_end();
+ g_assert_cmpint(s->drain_count, ==, 0);
+
+ /* Now do the same while a request is pending */
+ aio_ret = -EINPROGRESS;
+ acb = blk_aio_preadv(blk, 0, &qiov, 0, aio_ret_cb, &aio_ret);
+ g_assert(acb != NULL);
+ g_assert_cmpint(aio_ret, ==, -EINPROGRESS);
+
+ g_assert_cmpint(s->drain_count, ==, 0);
+ bdrv_drain_all_begin();
+ g_assert_cmpint(aio_ret, ==, 0);
+ g_assert_cmpint(s->drain_count, ==, 1);
+ bdrv_drain_all_end();
+ g_assert_cmpint(s->drain_count, ==, 0);
+
+ bdrv_unref(bs);
+ blk_unref(blk);
+}
+
+int main(int argc, char **argv)
+{
+ bdrv_init();
+ qemu_init_main_loop(&error_abort);
+
+ g_test_init(&argc, &argv, NULL);
+
+ g_test_add_func("/bdrv-drain/driver-cb/drain_all", test_drv_cb_drain_all);
+
+ return g_test_run();
+}
diff --git a/tests/Makefile.include b/tests/Makefile.include
index c002352134..c29db7616f 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -80,6 +80,7 @@ gcov-files-test-thread-pool-y = thread-pool.c
gcov-files-test-hbitmap-y = util/hbitmap.c
check-unit-y += tests/test-hbitmap$(EXESUF)
gcov-files-test-hbitmap-y = blockjob.c
+check-unit-y += tests/test-bdrv-drain$(EXESUF)
check-unit-y += tests/test-blockjob$(EXESUF)
check-unit-y += tests/test-blockjob-txn$(EXESUF)
check-unit-y += tests/test-x86-cpuid$(EXESUF)
@@ -592,6 +593,7 @@ tests/test-coroutine$(EXESUF): tests/test-coroutine.o
$(test-block-obj-y)
tests/test-aio$(EXESUF): tests/test-aio.o $(test-block-obj-y)
tests/test-aio-multithread$(EXESUF): tests/test-aio-multithread.o
$(test-block-obj-y)
tests/test-throttle$(EXESUF): tests/test-throttle.o $(test-block-obj-y)
+tests/test-bdrv-drain$(EXESUF): tests/test-bdrv-drain.o $(test-block-obj-y)
$(test-util-obj-y)
tests/test-blockjob$(EXESUF): tests/test-blockjob.o $(test-block-obj-y)
$(test-util-obj-y)
tests/test-blockjob-txn$(EXESUF): tests/test-blockjob-txn.o
$(test-block-obj-y) $(test-util-obj-y)
tests/test-thread-pool$(EXESUF): tests/test-thread-pool.o $(test-block-obj-y)
--
2.13.6
