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test/bdev: add resource counting to bdev mt unit tests

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This is in preparation for ENOMEM handling in the SPDK
bdev layer.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I6f5cdc63e4c1c903faa64c3eb61ea4aee0290ec1

Reviewed-on: https://review.gerrithub.io/380512
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Jim Harris 2017-09-27 08:24:37 -07:00
parent e9cf3ecf14
commit 7e846d2bb9
1 changed files with 34 additions and 9 deletions
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43
test/unit/lib/bdev/mt/bdev.c/bdev_ut.c
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@ -53,6 +53,8 @@ struct ut_bdev {
struct ut_bdev_channel {
TAILQ_HEAD(, spdk_bdev_io) outstanding_io;
uint32_t outstanding_cnt;
uint32_t avail_cnt;
};
struct ut_bdev g_bdev;
@ -64,6 +66,14 @@ stub_create_ch(void *io_device, void *ctx_buf)
struct ut_bdev_channel *ch = ctx_buf;
TAILQ_INIT(&ch->outstanding_io);
ch->outstanding_cnt = 0;
/*
* When avail gets to 0, the submit_request function will return ENOMEM.
* Most tests to not want ENOMEM to occur, so by default set this to a
* big value that won't get hit. The ENOMEM tests can then override this
* value to something much smaller to induce ENOMEM conditions.
*/
ch->avail_cnt = 2048;
return 0;
}
@ -89,23 +99,38 @@ stub_submit_request(struct spdk_io_channel *_ch, struct spdk_bdev_io *bdev_io)
{
struct ut_bdev_channel *ch = spdk_io_channel_get_ctx(_ch);
TAILQ_INSERT_TAIL(&ch->outstanding_io, bdev_io, module_link);
if (ch->avail_cnt > 0) {
TAILQ_INSERT_TAIL(&ch->outstanding_io, bdev_io, module_link);
ch->outstanding_cnt++;
ch->avail_cnt--;
} else {
spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
}
}
static void
stub_complete_io(void)
static uint32_t
stub_complete_io(uint32_t num_to_complete)
{
struct spdk_io_channel *_ch = spdk_get_io_channel(&g_bdev.io_target);
struct ut_bdev_channel *ch = spdk_io_channel_get_ctx(_ch);
struct spdk_bdev_io *io;
bool complete_all = (num_to_complete == 0);
uint32_t num_completed = 0;
while (!TAILQ_EMPTY(&ch->outstanding_io)) {
while (complete_all || num_completed < num_to_complete) {
if (TAILQ_EMPTY(&ch->outstanding_io)) {
break;
}
io = TAILQ_FIRST(&ch->outstanding_io);
TAILQ_REMOVE(&ch->outstanding_io, io, module_link);
ch->outstanding_cnt--;
spdk_bdev_io_complete(io, SPDK_BDEV_IO_STATUS_SUCCESS);
ch->avail_cnt++;
num_completed++;
}
spdk_put_io_channel(_ch);
return num_completed;
}
static struct spdk_bdev_fn_table fn_table = {
@ -222,7 +247,7 @@ put_channel_during_reset(void)
spdk_bdev_reset(g_desc, io_ch, reset_done, &done);
spdk_put_io_channel(io_ch);
poll_threads();
stub_complete_io();
stub_complete_io(0);
teardown_test();
}
@ -283,7 +308,7 @@ aborted_reset(void)
*/
set_thread(0);
spdk_put_io_channel(io_ch[0]);
stub_complete_io();
stub_complete_io(0);
poll_threads();
CU_ASSERT(status1 == SPDK_BDEV_IO_STATUS_SUCCESS);
CU_ASSERT(g_bdev.bdev.reset_in_progress == NULL);
@ -335,11 +360,11 @@ io_during_reset(void)
CU_ASSERT(status1 == SPDK_BDEV_IO_STATUS_PENDING);
set_thread(0);
stub_complete_io();
stub_complete_io(0);
CU_ASSERT(status0 == SPDK_BDEV_IO_STATUS_SUCCESS);
set_thread(1);
stub_complete_io();
stub_complete_io(0);
CU_ASSERT(status1 == SPDK_BDEV_IO_STATUS_SUCCESS);
/*
@ -378,7 +403,7 @@ io_during_reset(void)
CU_ASSERT(status1 == SPDK_BDEV_IO_STATUS_FAILED);
set_thread(0);
stub_complete_io();
stub_complete_io(0);
spdk_put_io_channel(io_ch[0]);
set_thread(1);
spdk_put_io_channel(io_ch[1]);