qemu/tests/test-bdrv-drain.c
Kevin Wolf da01ff7f38 job: Move coroutine and related code to Job
This commit moves some core functions for dealing with the job coroutine
from BlockJob to Job. This includes primarily entering the coroutine
(both for the first and reentering) and yielding explicitly and at pause
points.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
2018-05-23 14:30:50 +02:00

657 lines
21 KiB
C

/*
* 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 "block/blockjob_int.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,
.bdrv_child_perm = bdrv_format_default_perms,
};
static void aio_ret_cb(void *opaque, int ret)
{
int *aio_ret = opaque;
*aio_ret = ret;
}
typedef struct CallInCoroutineData {
void (*entry)(void);
bool done;
} CallInCoroutineData;
static coroutine_fn void call_in_coroutine_entry(void *opaque)
{
CallInCoroutineData *data = opaque;
data->entry();
data->done = true;
}
static void call_in_coroutine(void (*entry)(void))
{
Coroutine *co;
CallInCoroutineData data = {
.entry = entry,
.done = false,
};
co = 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,
BDRV_SUBTREE_DRAIN,
DRAIN_TYPE_MAX,
};
static void do_drain_begin(enum drain_type drain_type, BlockDriverState *bs)
{
switch (drain_type) {
case BDRV_DRAIN_ALL: bdrv_drain_all_begin(); break;
case BDRV_DRAIN: bdrv_drained_begin(bs); break;
case BDRV_SUBTREE_DRAIN: bdrv_subtree_drained_begin(bs); break;
default: g_assert_not_reached();
}
}
static void do_drain_end(enum drain_type drain_type, BlockDriverState *bs)
{
switch (drain_type) {
case BDRV_DRAIN_ALL: bdrv_drain_all_end(); break;
case BDRV_DRAIN: bdrv_drained_end(bs); break;
case BDRV_SUBTREE_DRAIN: bdrv_subtree_drained_end(bs); break;
default: g_assert_not_reached();
}
}
static void test_drv_cb_common(enum drain_type drain_type, bool recursive)
{
BlockBackend *blk;
BlockDriverState *bs, *backing;
BDRVTestState *s, *backing_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);
backing = bdrv_new_open_driver(&bdrv_test, "backing", 0, &error_abort);
backing_s = backing->opaque;
bdrv_set_backing_hd(bs, backing, &error_abort);
/* Simple bdrv_drain_all_begin/end pair, check that CBs are called */
g_assert_cmpint(s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
do_drain_begin(drain_type, bs);
g_assert_cmpint(s->drain_count, ==, 1);
g_assert_cmpint(backing_s->drain_count, ==, !!recursive);
do_drain_end(drain_type, bs);
g_assert_cmpint(s->drain_count, ==, 0);
g_assert_cmpint(backing_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);
g_assert_cmpint(backing_s->drain_count, ==, 0);
do_drain_begin(drain_type, bs);
g_assert_cmpint(aio_ret, ==, 0);
g_assert_cmpint(s->drain_count, ==, 1);
g_assert_cmpint(backing_s->drain_count, ==, !!recursive);
do_drain_end(drain_type, bs);
g_assert_cmpint(s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
bdrv_unref(backing);
bdrv_unref(bs);
blk_unref(blk);
}
static void test_drv_cb_drain_all(void)
{
test_drv_cb_common(BDRV_DRAIN_ALL, true);
}
static void test_drv_cb_drain(void)
{
test_drv_cb_common(BDRV_DRAIN, false);
}
static void test_drv_cb_drain_subtree(void)
{
test_drv_cb_common(BDRV_SUBTREE_DRAIN, true);
}
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;
BlockDriverState *bs, *backing;
blk = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "test-node", BDRV_O_RDWR,
&error_abort);
blk_insert_bs(blk, bs, &error_abort);
backing = bdrv_new_open_driver(&bdrv_test, "backing", 0, &error_abort);
bdrv_set_backing_hd(bs, backing, &error_abort);
g_assert_cmpint(bs->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
do_drain_begin(drain_type, bs);
g_assert_cmpint(bs->quiesce_counter, ==, 1);
g_assert_cmpint(backing->quiesce_counter, ==, !!recursive);
do_drain_end(drain_type, bs);
g_assert_cmpint(bs->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
bdrv_unref(backing);
bdrv_unref(bs);
blk_unref(blk);
}
static void test_quiesce_drain_all(void)
{
// XXX drain_all doesn't quiesce
//test_quiesce_common(BDRV_DRAIN_ALL, true);
}
static void test_quiesce_drain(void)
{
test_quiesce_common(BDRV_DRAIN, false);
}
static void test_quiesce_drain_subtree(void)
{
test_quiesce_common(BDRV_SUBTREE_DRAIN, true);
}
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;
BlockDriverState *bs, *backing;
BDRVTestState *s, *backing_s;
enum drain_type outer, inner;
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);
backing = bdrv_new_open_driver(&bdrv_test, "backing", 0, &error_abort);
backing_s = backing->opaque;
bdrv_set_backing_hd(bs, backing, &error_abort);
for (outer = 0; outer < DRAIN_TYPE_MAX; outer++) {
for (inner = 0; inner < DRAIN_TYPE_MAX; inner++) {
/* XXX bdrv_drain_all() doesn't increase the quiesce_counter */
int bs_quiesce = (outer != BDRV_DRAIN_ALL) +
(inner != BDRV_DRAIN_ALL);
int backing_quiesce = (outer == BDRV_SUBTREE_DRAIN) +
(inner == BDRV_SUBTREE_DRAIN);
int backing_cb_cnt = (outer != BDRV_DRAIN) +
(inner != BDRV_DRAIN);
g_assert_cmpint(bs->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
g_assert_cmpint(s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
do_drain_begin(outer, bs);
do_drain_begin(inner, bs);
g_assert_cmpint(bs->quiesce_counter, ==, bs_quiesce);
g_assert_cmpint(backing->quiesce_counter, ==, backing_quiesce);
g_assert_cmpint(s->drain_count, ==, 2);
g_assert_cmpint(backing_s->drain_count, ==, backing_cb_cnt);
do_drain_end(inner, bs);
do_drain_end(outer, bs);
g_assert_cmpint(bs->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
g_assert_cmpint(s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
}
}
bdrv_unref(backing);
bdrv_unref(bs);
blk_unref(blk);
}
static void test_multiparent(void)
{
BlockBackend *blk_a, *blk_b;
BlockDriverState *bs_a, *bs_b, *backing;
BDRVTestState *a_s, *b_s, *backing_s;
blk_a = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
bs_a = bdrv_new_open_driver(&bdrv_test, "test-node-a", BDRV_O_RDWR,
&error_abort);
a_s = bs_a->opaque;
blk_insert_bs(blk_a, bs_a, &error_abort);
blk_b = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
bs_b = bdrv_new_open_driver(&bdrv_test, "test-node-b", BDRV_O_RDWR,
&error_abort);
b_s = bs_b->opaque;
blk_insert_bs(blk_b, bs_b, &error_abort);
backing = bdrv_new_open_driver(&bdrv_test, "backing", 0, &error_abort);
backing_s = backing->opaque;
bdrv_set_backing_hd(bs_a, backing, &error_abort);
bdrv_set_backing_hd(bs_b, backing, &error_abort);
g_assert_cmpint(bs_a->quiesce_counter, ==, 0);
g_assert_cmpint(bs_b->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
g_assert_cmpint(a_s->drain_count, ==, 0);
g_assert_cmpint(b_s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
do_drain_begin(BDRV_SUBTREE_DRAIN, bs_a);
g_assert_cmpint(bs_a->quiesce_counter, ==, 1);
g_assert_cmpint(bs_b->quiesce_counter, ==, 1);
g_assert_cmpint(backing->quiesce_counter, ==, 1);
g_assert_cmpint(a_s->drain_count, ==, 1);
g_assert_cmpint(b_s->drain_count, ==, 1);
g_assert_cmpint(backing_s->drain_count, ==, 1);
do_drain_begin(BDRV_SUBTREE_DRAIN, bs_b);
g_assert_cmpint(bs_a->quiesce_counter, ==, 2);
g_assert_cmpint(bs_b->quiesce_counter, ==, 2);
g_assert_cmpint(backing->quiesce_counter, ==, 2);
g_assert_cmpint(a_s->drain_count, ==, 2);
g_assert_cmpint(b_s->drain_count, ==, 2);
g_assert_cmpint(backing_s->drain_count, ==, 2);
do_drain_end(BDRV_SUBTREE_DRAIN, bs_b);
g_assert_cmpint(bs_a->quiesce_counter, ==, 1);
g_assert_cmpint(bs_b->quiesce_counter, ==, 1);
g_assert_cmpint(backing->quiesce_counter, ==, 1);
g_assert_cmpint(a_s->drain_count, ==, 1);
g_assert_cmpint(b_s->drain_count, ==, 1);
g_assert_cmpint(backing_s->drain_count, ==, 1);
do_drain_end(BDRV_SUBTREE_DRAIN, bs_a);
g_assert_cmpint(bs_a->quiesce_counter, ==, 0);
g_assert_cmpint(bs_b->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
g_assert_cmpint(a_s->drain_count, ==, 0);
g_assert_cmpint(b_s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
bdrv_unref(backing);
bdrv_unref(bs_a);
bdrv_unref(bs_b);
blk_unref(blk_a);
blk_unref(blk_b);
}
static void test_graph_change(void)
{
BlockBackend *blk_a, *blk_b;
BlockDriverState *bs_a, *bs_b, *backing;
BDRVTestState *a_s, *b_s, *backing_s;
blk_a = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
bs_a = bdrv_new_open_driver(&bdrv_test, "test-node-a", BDRV_O_RDWR,
&error_abort);
a_s = bs_a->opaque;
blk_insert_bs(blk_a, bs_a, &error_abort);
blk_b = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
bs_b = bdrv_new_open_driver(&bdrv_test, "test-node-b", BDRV_O_RDWR,
&error_abort);
b_s = bs_b->opaque;
blk_insert_bs(blk_b, bs_b, &error_abort);
backing = bdrv_new_open_driver(&bdrv_test, "backing", 0, &error_abort);
backing_s = backing->opaque;
bdrv_set_backing_hd(bs_a, backing, &error_abort);
g_assert_cmpint(bs_a->quiesce_counter, ==, 0);
g_assert_cmpint(bs_b->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
g_assert_cmpint(a_s->drain_count, ==, 0);
g_assert_cmpint(b_s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
do_drain_begin(BDRV_SUBTREE_DRAIN, bs_a);
do_drain_begin(BDRV_SUBTREE_DRAIN, bs_a);
do_drain_begin(BDRV_SUBTREE_DRAIN, bs_a);
do_drain_begin(BDRV_SUBTREE_DRAIN, bs_b);
do_drain_begin(BDRV_SUBTREE_DRAIN, bs_b);
bdrv_set_backing_hd(bs_b, backing, &error_abort);
g_assert_cmpint(bs_a->quiesce_counter, ==, 5);
g_assert_cmpint(bs_b->quiesce_counter, ==, 5);
g_assert_cmpint(backing->quiesce_counter, ==, 5);
g_assert_cmpint(a_s->drain_count, ==, 5);
g_assert_cmpint(b_s->drain_count, ==, 5);
g_assert_cmpint(backing_s->drain_count, ==, 5);
bdrv_set_backing_hd(bs_b, NULL, &error_abort);
g_assert_cmpint(bs_a->quiesce_counter, ==, 3);
g_assert_cmpint(bs_b->quiesce_counter, ==, 2);
g_assert_cmpint(backing->quiesce_counter, ==, 3);
g_assert_cmpint(a_s->drain_count, ==, 3);
g_assert_cmpint(b_s->drain_count, ==, 2);
g_assert_cmpint(backing_s->drain_count, ==, 3);
bdrv_set_backing_hd(bs_b, backing, &error_abort);
g_assert_cmpint(bs_a->quiesce_counter, ==, 5);
g_assert_cmpint(bs_b->quiesce_counter, ==, 5);
g_assert_cmpint(backing->quiesce_counter, ==, 5);
g_assert_cmpint(a_s->drain_count, ==, 5);
g_assert_cmpint(b_s->drain_count, ==, 5);
g_assert_cmpint(backing_s->drain_count, ==, 5);
do_drain_end(BDRV_SUBTREE_DRAIN, bs_b);
do_drain_end(BDRV_SUBTREE_DRAIN, bs_b);
do_drain_end(BDRV_SUBTREE_DRAIN, bs_a);
do_drain_end(BDRV_SUBTREE_DRAIN, bs_a);
do_drain_end(BDRV_SUBTREE_DRAIN, bs_a);
g_assert_cmpint(bs_a->quiesce_counter, ==, 0);
g_assert_cmpint(bs_b->quiesce_counter, ==, 0);
g_assert_cmpint(backing->quiesce_counter, ==, 0);
g_assert_cmpint(a_s->drain_count, ==, 0);
g_assert_cmpint(b_s->drain_count, ==, 0);
g_assert_cmpint(backing_s->drain_count, ==, 0);
bdrv_unref(backing);
bdrv_unref(bs_a);
bdrv_unref(bs_b);
blk_unref(blk_a);
blk_unref(blk_b);
}
typedef struct TestBlockJob {
BlockJob common;
bool should_complete;
} TestBlockJob;
static void test_job_completed(Job *job, void *opaque)
{
BlockJob *bjob = container_of(job, BlockJob, job);
block_job_completed(bjob, 0);
}
static void coroutine_fn test_job_start(void *opaque)
{
TestBlockJob *s = opaque;
block_job_event_ready(&s->common);
while (!s->should_complete) {
block_job_sleep_ns(&s->common, 100000);
}
job_defer_to_main_loop(&s->common.job, test_job_completed, NULL);
}
static void test_job_complete(BlockJob *job, Error **errp)
{
TestBlockJob *s = container_of(job, TestBlockJob, common);
s->should_complete = true;
}
BlockJobDriver test_job_driver = {
.job_driver = {
.instance_size = sizeof(TestBlockJob),
.free = block_job_free,
.start = test_job_start,
},
.complete = test_job_complete,
};
static void test_blockjob_common(enum drain_type drain_type)
{
BlockBackend *blk_src, *blk_target;
BlockDriverState *src, *target;
BlockJob *job;
int ret;
src = bdrv_new_open_driver(&bdrv_test, "source", BDRV_O_RDWR,
&error_abort);
blk_src = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
blk_insert_bs(blk_src, src, &error_abort);
target = bdrv_new_open_driver(&bdrv_test, "target", BDRV_O_RDWR,
&error_abort);
blk_target = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
blk_insert_bs(blk_target, target, &error_abort);
job = block_job_create("job0", &test_job_driver, NULL, src, 0, BLK_PERM_ALL,
0, 0, NULL, NULL, &error_abort);
block_job_add_bdrv(job, "target", target, 0, BLK_PERM_ALL, &error_abort);
job_start(&job->job);
g_assert_cmpint(job->job.pause_count, ==, 0);
g_assert_false(job->job.paused);
g_assert_false(job->job.busy); /* We're in block_job_sleep_ns() */
do_drain_begin(drain_type, src);
if (drain_type == BDRV_DRAIN_ALL) {
/* bdrv_drain_all() drains both src and target */
g_assert_cmpint(job->job.pause_count, ==, 2);
} else {
g_assert_cmpint(job->job.pause_count, ==, 1);
}
/* XXX We don't wait until the job is actually paused. Is this okay? */
/* g_assert_true(job->job.paused); */
g_assert_false(job->job.busy); /* The job is paused */
do_drain_end(drain_type, src);
g_assert_cmpint(job->job.pause_count, ==, 0);
g_assert_false(job->job.paused);
g_assert_false(job->job.busy); /* We're in block_job_sleep_ns() */
do_drain_begin(drain_type, target);
if (drain_type == BDRV_DRAIN_ALL) {
/* bdrv_drain_all() drains both src and target */
g_assert_cmpint(job->job.pause_count, ==, 2);
} else {
g_assert_cmpint(job->job.pause_count, ==, 1);
}
/* XXX We don't wait until the job is actually paused. Is this okay? */
/* g_assert_true(job->job.paused); */
g_assert_false(job->job.busy); /* The job is paused */
do_drain_end(drain_type, target);
g_assert_cmpint(job->job.pause_count, ==, 0);
g_assert_false(job->job.paused);
g_assert_false(job->job.busy); /* We're in block_job_sleep_ns() */
ret = block_job_complete_sync(job, &error_abort);
g_assert_cmpint(ret, ==, 0);
blk_unref(blk_src);
blk_unref(blk_target);
bdrv_unref(src);
bdrv_unref(target);
}
static void test_blockjob_drain_all(void)
{
test_blockjob_common(BDRV_DRAIN_ALL);
}
static void test_blockjob_drain(void)
{
test_blockjob_common(BDRV_DRAIN);
}
static void test_blockjob_drain_subtree(void)
{
test_blockjob_common(BDRV_SUBTREE_DRAIN);
}
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);
g_test_add_func("/bdrv-drain/driver-cb/drain", test_drv_cb_drain);
g_test_add_func("/bdrv-drain/driver-cb/drain_subtree",
test_drv_cb_drain_subtree);
// 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_all);
g_test_add_func("/bdrv-drain/quiesce/drain", test_quiesce_drain);
g_test_add_func("/bdrv-drain/quiesce/drain_subtree",
test_quiesce_drain_subtree);
// 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);
g_test_add_func("/bdrv-drain/multiparent", test_multiparent);
g_test_add_func("/bdrv-drain/graph-change", test_graph_change);
g_test_add_func("/bdrv-drain/blockjob/drain_all", test_blockjob_drain_all);
g_test_add_func("/bdrv-drain/blockjob/drain", test_blockjob_drain);
g_test_add_func("/bdrv-drain/blockjob/drain_subtree",
test_blockjob_drain_subtree);
return g_test_run();
}