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ut/bdev: Exercise the ENOMEM path in the IO splitting

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Splitting IO in the bdev layer is a little complex and increasing
the coverage in unit tests will be good.

Change-Id: I9d42cedc795b2804a472bdc310e936135c424fd3
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-on: https://review.gerrithub.io/427948
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Shuhei Matsumoto 2018-10-04 12:48:51 +09:00 committed by Jim Harris
parent fb0fe6b1be
commit a8780177c6
1 changed files with 82 additions and 1 deletions
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83
test/unit/lib/bdev/bdev.c/bdev_ut.c
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@ -1054,6 +1054,86 @@ bdev_io_split(void)
spdk_bdev_finish(bdev_fini_cb, NULL);
}
static void
bdev_io_split_with_io_wait(void)
{
struct spdk_bdev *bdev;
struct spdk_bdev_desc *desc;
struct spdk_io_channel *io_ch;
struct spdk_bdev_channel *channel;
struct spdk_bdev_mgmt_channel *mgmt_ch;
struct spdk_bdev_opts bdev_opts = {
.bdev_io_pool_size = 2,
.bdev_io_cache_size = 1,
};
struct ut_expected_io *expected_io;
int rc;
rc = spdk_bdev_set_opts(&bdev_opts);
CU_ASSERT(rc == 0);
spdk_bdev_initialize(bdev_init_cb, NULL);
bdev = allocate_bdev("bdev0");
rc = spdk_bdev_open(bdev, true, NULL, NULL, &desc);
CU_ASSERT(rc == 0);
CU_ASSERT(desc != NULL);
io_ch = spdk_bdev_get_io_channel(desc);
CU_ASSERT(io_ch != NULL);
channel = spdk_io_channel_get_ctx(io_ch);
mgmt_ch = channel->shared_resource->mgmt_ch;
bdev->optimal_io_boundary = 16;
bdev->split_on_optimal_io_boundary = true;
rc = spdk_bdev_read_blocks(desc, io_ch, NULL, 0, 1, io_done, NULL);
CU_ASSERT(rc == 0);
/* Now test that a single-vector command is split correctly.
* Offset 14, length 8, payload 0xF000
* Child - Offset 14, length 2, payload 0xF000
* Child - Offset 16, length 6, payload 0xF000 + 2 * 512
*
* This I/O will consume three spdk_bdev_io.
* Set up the expected values before calling spdk_bdev_read_blocks
*/
expected_io = ut_alloc_expected_io(SPDK_BDEV_IO_TYPE_READ, 14, 2, 1);
ut_expected_io_set_iov(expected_io, 0, (void *)0xF000, 2 * 512);
TAILQ_INSERT_TAIL(&g_bdev_ut_channel->expected_io, expected_io, link);
expected_io = ut_alloc_expected_io(SPDK_BDEV_IO_TYPE_READ, 16, 6, 1);
ut_expected_io_set_iov(expected_io, 0, (void *)(0xF000 + 2 * 512), 6 * 512);
TAILQ_INSERT_TAIL(&g_bdev_ut_channel->expected_io, expected_io, link);
/* The first child I/O will be queued to wait until an spdk_bdev_io becomes available */
rc = spdk_bdev_read_blocks(desc, io_ch, (void *)0xF000, 14, 8, io_done, NULL);
CU_ASSERT(rc == 0);
CU_ASSERT(!TAILQ_EMPTY(&mgmt_ch->io_wait_queue));
CU_ASSERT(g_bdev_ut_channel->outstanding_io_count == 1);
/* Completing the first read I/O will submit the first child */
stub_complete_io(1);
CU_ASSERT(TAILQ_EMPTY(&mgmt_ch->io_wait_queue));
CU_ASSERT(g_bdev_ut_channel->outstanding_io_count == 1);
/* Completing the first child will submit the second child */
stub_complete_io(1);
CU_ASSERT(g_bdev_ut_channel->outstanding_io_count == 1);
/* Complete the second child I/O. This should result in our callback getting
* invoked since the parent I/O is now complete.
*/
stub_complete_io(1);
CU_ASSERT(g_bdev_ut_channel->outstanding_io_count == 0);
CU_ASSERT(TAILQ_EMPTY(&g_bdev_ut_channel->expected_io));
spdk_put_io_channel(io_ch);
spdk_bdev_close(desc);
free_bdev(bdev);
spdk_bdev_finish(bdev_fini_cb, NULL);
}
int
main(int argc, char **argv)
{
@ -1079,7 +1159,8 @@ main(int argc, char **argv)
CU_add_test(suite, "get_device_stat", get_device_stat_test) == NULL ||
CU_add_test(suite, "bdev_io_wait", bdev_io_wait_test) == NULL ||
CU_add_test(suite, "bdev_io_spans_boundary", bdev_io_spans_boundary_test) == NULL ||
CU_add_test(suite, "bdev_io_split", bdev_io_split) == NULL
CU_add_test(suite, "bdev_io_split", bdev_io_split) == NULL ||
CU_add_test(suite, "bdev_io_split_with_io_wait", bdev_io_split_with_io_wait) == NULL
) {
CU_cleanup_registry();
return CU_get_error();