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test-bdrv-drain: Test bdrv_append() to drained node 

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2018-07-03 17:55:16 +02:00
parent 4be6a6d118
commit b994c5bc51
1 changed files with 43 additions and 0 deletions
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43
tests/test-bdrv-drain.c
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@ -1250,6 +1250,47 @@ static void test_detach_by_driver_cb(void)
test_detach_indirect(false);
}
static void test_append_to_drained(void)
{
BlockBackend *blk;
BlockDriverState *base, *overlay;
BDRVTestState *base_s, *overlay_s;
blk = blk_new(BLK_PERM_ALL, BLK_PERM_ALL);
base = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
base_s = base->opaque;
blk_insert_bs(blk, base, &error_abort);
overlay = bdrv_new_open_driver(&bdrv_test, "overlay", BDRV_O_RDWR,
&error_abort);
overlay_s = overlay->opaque;
do_drain_begin(BDRV_DRAIN, base);
g_assert_cmpint(base->quiesce_counter, ==, 1);
g_assert_cmpint(base_s->drain_count, ==, 1);
g_assert_cmpint(base->in_flight, ==, 0);
/* Takes ownership of overlay, so we don't have to unref it later */
bdrv_append(overlay, base, &error_abort);
g_assert_cmpint(base->in_flight, ==, 0);
g_assert_cmpint(overlay->in_flight, ==, 0);
g_assert_cmpint(base->quiesce_counter, ==, 1);
g_assert_cmpint(base_s->drain_count, ==, 1);
g_assert_cmpint(overlay->quiesce_counter, ==, 1);
g_assert_cmpint(overlay_s->drain_count, ==, 1);
do_drain_end(BDRV_DRAIN, base);
g_assert_cmpint(base->quiesce_counter, ==, 0);
g_assert_cmpint(base_s->drain_count, ==, 0);
g_assert_cmpint(overlay->quiesce_counter, ==, 0);
g_assert_cmpint(overlay_s->drain_count, ==, 0);
bdrv_unref(base);
blk_unref(blk);
}
int main(int argc, char **argv)
{
int ret;
@ -1308,6 +1349,8 @@ int main(int argc, char **argv)
g_test_add_func("/bdrv-drain/detach/parent_cb", test_detach_by_parent_cb);
g_test_add_func("/bdrv-drain/detach/driver_cb", test_detach_by_driver_cb);
g_test_add_func("/bdrv-drain/attach/drain", test_append_to_drained);
ret = g_test_run();
qemu_event_destroy(&done_event);
return ret;