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authorKevin Wolf <kwolf@redhat.com>2017-12-05 14:05:02 +0100
committerKevin Wolf <kwolf@redhat.com>2017-12-22 15:03:41 +0100
commit881cfd17c734634de0f4bc6725940cca4fd314c9 (patch)
tree057198a548daf3d972e5afda5a8a0df612f4b259 /tests/test-bdrv-drain.c
parent2da9b7d456278bccc6ce889ae350f2867155d7e8 (diff)
downloadqemu-881cfd17c734634de0f4bc6725940cca4fd314c9.tar.gz
test-bdrv-drain: Test BlockDriver callbacks for drain
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 <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'tests/test-bdrv-drain.c')
-rw-r--r--tests/test-bdrv-drain.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
new file mode 100644
index 0000000000..0e567e34ba
--- /dev/null
+++ b/tests/test-bdrv-drain.c
@@ -0,0 +1,137 @@
+/*
+ * Block node draining tests
+ *
+ * Copyright (c) 2017 Kevin Wolf <kwolf@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. */
+ qemu_co_sleep_ns(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();
+}