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test-block-iothread: BlockBackend AioContext across root node change 

Test that BlockBackends preserve their assigned AioContext even when the
root node goes away. Inserting a new root node will move it to the right
AioContext.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2019-04-24 17:47:34 +02:00
parent 48946d7d64
commit 2e9cdab300
1 changed files with 33 additions and 0 deletions
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33
tests/test-block-iothread.c
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@ -695,6 +695,38 @@ static void test_attach_second_node(void)
blk_unref(blk);
}
static void test_attach_preserve_blk_ctx(void)
{
IOThread *iothread = iothread_new();
AioContext *ctx = iothread_get_aio_context(iothread);
BlockBackend *blk;
BlockDriverState *bs;
blk = blk_new(ctx, BLK_PERM_ALL, BLK_PERM_ALL);
bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
bs->total_sectors = 65536 / BDRV_SECTOR_SIZE;
/* Add node to BlockBackend that has an iothread context assigned */
blk_insert_bs(blk, bs, &error_abort);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs) == ctx);
/* Remove the node again */
blk_remove_bs(blk);
/* TODO bs should move back to main context here */
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs) == ctx);
/* Re-attach the node */
blk_insert_bs(blk, bs, &error_abort);
g_assert(blk_get_aio_context(blk) == ctx);
g_assert(bdrv_get_aio_context(bs) == ctx);
blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
bdrv_unref(bs);
blk_unref(blk);
}
int main(int argc, char **argv)
{
int i;
@ -711,6 +743,7 @@ int main(int argc, char **argv)
g_test_add_func("/attach/blockjob", test_attach_blockjob);
g_test_add_func("/attach/second_node", test_attach_second_node);
g_test_add_func("/attach/preserve_blk_ctx", test_attach_preserve_blk_ctx);
g_test_add_func("/propagate/basic", test_propagate_basic);
g_test_add_func("/propagate/diamond", test_propagate_diamond);
g_test_add_func("/propagate/mirror", test_propagate_mirror);