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bdev/nvme: Factor out request submit functions into a helper function

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The following patches will change I/O retry to use the same io_path if
it is still available. However, bdev_nvme_submit_request() always calls
bdev_nvme_find_io_path() first. For I/O retry, if possible, we want to
skip calling bdev_nvme_find_io_path() and use nbdev_io->io_path instead.
To reuse the code as much as possible and not to touch the fast code
path, factor out request submit functions from
bdev_nvme_submit_request() into _bdev_nvme_submit_request().

While developing this patch, a bug/mismatch was found such that
bdev_io->internal.ch was different from ch of
bdev_nvme_submit_request(). Fix it together in this patch.

Signed-off-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Change-Id: Id003e033ecde218d1902bca5706c772edef5d5e5
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/16013
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Shuhei Matsumoto 2023-01-10 15:39:41 +09:00 committed by Jim Harris
parent 2796687d54
commit 21160add26
2 changed files with 29 additions and 22 deletions
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43
module/bdev/nvme/bdev_nvme.c
View File

@ -2111,28 +2111,14 @@ exit:
}
}
static void
bdev_nvme_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
static inline void
_bdev_nvme_submit_request(struct nvme_bdev_channel *nbdev_ch, struct spdk_bdev_io *bdev_io)
{
struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
struct spdk_bdev *bdev = bdev_io->bdev;
struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
struct spdk_bdev *bdev = bdev_io->bdev;
struct nvme_bdev_io *nbdev_io_to_abort;
int rc = 0;
spdk_trace_record(TRACE_BDEV_NVME_IO_START, 0, 0, (uintptr_t)nbdev_io, (uintptr_t)bdev_io);
nbdev_io->io_path = bdev_nvme_find_io_path(nbdev_ch);
if (spdk_unlikely(!nbdev_io->io_path)) {
if (!bdev_nvme_io_type_is_admin(bdev_io->type)) {
rc = -ENXIO;
goto exit;
}
/* Admin commands do not use the optimal I/O path.
* Simply fall through even if it is not found.
*/
}
switch (bdev_io->type) {
case SPDK_BDEV_IO_TYPE_READ:
if (bdev_io->u.bdev.iovs && bdev_io->u.bdev.iovs[0].iov_base) {
@ -2257,12 +2243,33 @@ bdev_nvme_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_i
break;
}
exit:
if (spdk_unlikely(rc != 0)) {
bdev_nvme_io_complete(nbdev_io, rc);
}
}
static void
bdev_nvme_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
{
struct nvme_bdev_channel *nbdev_ch = spdk_io_channel_get_ctx(ch);
struct nvme_bdev_io *nbdev_io = (struct nvme_bdev_io *)bdev_io->driver_ctx;
spdk_trace_record(TRACE_BDEV_NVME_IO_START, 0, 0, (uintptr_t)nbdev_io, (uintptr_t)bdev_io);
nbdev_io->io_path = bdev_nvme_find_io_path(nbdev_ch);
if (spdk_unlikely(!nbdev_io->io_path)) {
if (!bdev_nvme_io_type_is_admin(bdev_io->type)) {
bdev_nvme_io_complete(nbdev_io, -ENXIO);
return;
}
/* Admin commands do not use the optimal I/O path.
* Simply fall through even if it is not found.
*/
}
_bdev_nvme_submit_request(nbdev_ch, bdev_io);
}
static bool
bdev_nvme_io_type_supported(void *ctx, enum spdk_bdev_io_type io_type)
{

8
test/unit/lib/bdev/nvme/bdev_nvme.c/bdev_nvme_ut.c
View File

@ -1858,9 +1858,6 @@ test_pending_reset(void)
ctrlr_ch1 = io_path1->qpair->ctrlr_ch;
SPDK_CU_ASSERT_FATAL(ctrlr_ch1 != NULL);
first_bdev_io = ut_alloc_bdev_io(SPDK_BDEV_IO_TYPE_RESET, bdev, ch1);
first_bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
set_thread(1);
ch2 = spdk_get_io_channel(bdev);
@ -1872,7 +1869,10 @@ test_pending_reset(void)
ctrlr_ch2 = io_path2->qpair->ctrlr_ch;
SPDK_CU_ASSERT_FATAL(ctrlr_ch2 != NULL);
second_bdev_io = ut_alloc_bdev_io(SPDK_BDEV_IO_TYPE_RESET, bdev, ch2);
first_bdev_io = ut_alloc_bdev_io(SPDK_BDEV_IO_TYPE_RESET, bdev, ch2);
first_bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
second_bdev_io = ut_alloc_bdev_io(SPDK_BDEV_IO_TYPE_RESET, bdev, ch1);
second_bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
/* The first reset request is submitted on thread 1, and the second reset request