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From: Kevin Wolf <kwolf@redhat.com>
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Date: Fri, 22 Dec 2017 16:18:41 +0100
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Subject: [Qemu-devel] [PULL v3 30/35] test-bdrv-drain: Test behaviour in
coroutine context
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If bdrv_do_drained_begin/end() are called in coroutine context, they
first use a BH to get out of the coroutine context. Call some existing
tests again from a coroutine to cover this code path.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
tests/test-bdrv-drain.c | 59 +++++++++++++++++++++++++++++++++++++++++++++=
++++
1 file changed, 59 insertions(+)
diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index f363d51b34..354c6151a0 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -82,6 +82,34 @@ static void aio_ret_cb(void *opaque, int ret)
*aio_ret =3D ret;
}
=20
+typedef struct CallInCoroutineData {
+ void (*entry)(void);
+ bool done;
+} CallInCoroutineData;
+
+static coroutine_fn void call_in_coroutine_entry(void *opaque)
+{
+ CallInCoroutineData *data =3D opaque;
+
+ data->entry();
+ data->done =3D true;
+}
+
+static void call_in_coroutine(void (*entry)(void))
+{
+ Coroutine *co;
+ CallInCoroutineData data =3D {
+ .entry =3D entry,
+ .done =3D false,
+ };
+
+ co =3D qemu_coroutine_create(call_in_coroutine_entry, &data);
+ qemu_coroutine_enter(co);
+ while (!data.done) {
+ aio_poll(qemu_get_aio_context(), true);
+ }
+}
+
enum drain_type {
BDRV_DRAIN_ALL,
BDRV_DRAIN,
@@ -188,6 +216,16 @@ static void test_drv_cb_drain_subtree(void)
test_drv_cb_common(BDRV_SUBTREE_DRAIN, true);
}
=20
+static void test_drv_cb_co_drain(void)
+{
+ call_in_coroutine(test_drv_cb_drain);
+}
+
+static void test_drv_cb_co_drain_subtree(void)
+{
+ call_in_coroutine(test_drv_cb_drain_subtree);
+}
+
static void test_quiesce_common(enum drain_type drain_type, bool recursive)
{
BlockBackend *blk;
@@ -235,6 +273,16 @@ static void test_quiesce_drain_subtree(void)
test_quiesce_common(BDRV_SUBTREE_DRAIN, true);
}
=20
+static void test_quiesce_co_drain(void)
+{
+ call_in_coroutine(test_quiesce_drain);
+}
+
+static void test_quiesce_co_drain_subtree(void)
+{
+ call_in_coroutine(test_quiesce_drain_subtree);
+}
+
static void test_nested(void)
{
BlockBackend *blk;
@@ -422,11 +470,22 @@ int main(int argc, char **argv)
g_test_add_func("/bdrv-drain/driver-cb/drain_subtree",
test_drv_cb_drain_subtree);
=20
+ // XXX bdrv_drain_all() doesn't work in coroutine context
+ g_test_add_func("/bdrv-drain/driver-cb/co/drain", test_drv_cb_co_drain=
);
+ g_test_add_func("/bdrv-drain/driver-cb/co/drain_subtree",
+ test_drv_cb_co_drain_subtree);
+
+
g_test_add_func("/bdrv-drain/quiesce/drain_all", test_quiesce_drain_al=
l);
g_test_add_func("/bdrv-drain/quiesce/drain", test_quiesce_drain);
g_test_add_func("/bdrv-drain/quiesce/drain_subtree",
test_quiesce_drain_subtree);
=20
+ // XXX bdrv_drain_all() doesn't work in coroutine context
+ g_test_add_func("/bdrv-drain/quiesce/co/drain", test_quiesce_co_drain);
+ g_test_add_func("/bdrv-drain/quiesce/co/drain_subtree",
+ test_quiesce_co_drain_subtree);
+
g_test_add_func("/bdrv-drain/nested", test_nested);
=20
g_test_add_func("/bdrv-drain/blockjob/drain_all", test_blockjob_drain_=
all);
--=20
2.13.6