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bdev/nvme: Refactor create/destroy_ctrlr_channel_cb()

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The following patches will have the following changes.

Add nvme_qpair object and move qpair and poll_group pointers and
the io_path_list list from nvme_ctrlr_channel to nvme_qpair. nvme_qpair
is allocated dynamically when creating nvme_ctrlr_channel, and
nvme_ctrlr_channel points to nvme_qpair.

qpair is disconnected asynchronously and nvme_ctrlr_channel is
deleted asynchronously.

To make the following patches simpler, refactor two functions,
bdev_nvme_create_ctrlr_channel_cb() and
bdev_nvme_destroy_ctrlr_channel_cb(). The details are as follows.

Factor out nvme_qpair_create() from bdev_nvme_create_ctrlr_channel_cb()
and factor out nvme_qpair_delete() from
bdev_nvme_destroy_ctrlr_channel_cb(). Then reorder a few operation
in these.

Additionally, reorder a operation in _bdev_nvme_add_io_path().

Change-Id: Idf0328fa77a54f40fe52ca72c3842dde82d55972
Signed-off-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11831
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@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 2022-03-07 10:38:34 +09:00 committed by Tomasz Zawadzki
parent d7f0a1820e
commit c1b0b339cf
1 changed files with 28 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
module/bdev/nvme/bdev_nvme.c
View File

@ -587,6 +587,8 @@ _bdev_nvme_add_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_
return -ENOMEM;
}
io_path->nvme_ns = nvme_ns;
ch = spdk_get_io_channel(nvme_ns->ctrlr);
if (ch == NULL) {
free(io_path);
@ -597,8 +599,6 @@ _bdev_nvme_add_io_path(struct nvme_bdev_channel *nbdev_ch, struct nvme_ns *nvme_
io_path->ctrlr_ch = spdk_io_channel_get_ctx(ch);
TAILQ_INSERT_TAIL(&io_path->ctrlr_ch->io_path_list, io_path, tailq);
io_path->nvme_ns = nvme_ns;
io_path->nbdev_ch = nbdev_ch;
STAILQ_INSERT_TAIL(&nbdev_ch->io_path_list, io_path, stailq);
@ -2041,20 +2041,19 @@ bdev_nvme_io_type_supported(void *ctx, enum spdk_bdev_io_type io_type)
}
static int
bdev_nvme_create_ctrlr_channel_cb(void *io_device, void *ctx_buf)
nvme_qpair_create(struct nvme_ctrlr *nvme_ctrlr, struct nvme_ctrlr_channel *ctrlr_ch)
{
struct nvme_ctrlr *nvme_ctrlr = io_device;
struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
struct spdk_io_channel *pg_ch;
int rc;
TAILQ_INIT(&ctrlr_ch->io_path_list);
pg_ch = spdk_get_io_channel(&g_nvme_bdev_ctrlrs);
if (!pg_ch) {
return -1;
}
ctrlr_ch->group = spdk_io_channel_get_ctx(pg_ch);
TAILQ_INSERT_TAIL(&ctrlr_ch->group->ctrlr_ch_list, ctrlr_ch, tailq);
#ifdef SPDK_CONFIG_VTUNE
ctrlr_ch->group->collect_spin_stat = true;
@ -2062,26 +2061,41 @@ bdev_nvme_create_ctrlr_channel_cb(void *io_device, void *ctx_buf)
ctrlr_ch->group->collect_spin_stat = false;
#endif
TAILQ_INIT(&ctrlr_ch->pending_resets);
TAILQ_INIT(&ctrlr_ch->io_path_list);
rc = bdev_nvme_create_qpair(ctrlr_ch);
if (rc != 0) {
/* nvme ctrlr can't create IO qpair during reset. In that case ctrlr_ch->qpair
* pointer will be NULL and IO qpair will be created when reset completes.
* If the user submits IO requests during reset, they will be queued and resubmitted later */
if (!nvme_ctrlr->resetting) {
goto err_qpair;
spdk_put_io_channel(pg_ch);
return rc;
}
}
TAILQ_INSERT_TAIL(&ctrlr_ch->group->ctrlr_ch_list, ctrlr_ch, tailq);
return 0;
}
static int
bdev_nvme_create_ctrlr_channel_cb(void *io_device, void *ctx_buf)
{
struct nvme_ctrlr *nvme_ctrlr = io_device;
struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
TAILQ_INIT(&ctrlr_ch->pending_resets);
return nvme_qpair_create(nvme_ctrlr, ctrlr_ch);
}
static void
nvme_qpair_delete(struct nvme_ctrlr_channel *ctrlr_ch)
{
assert(ctrlr_ch->group != NULL);
err_qpair:
TAILQ_REMOVE(&ctrlr_ch->group->ctrlr_ch_list, ctrlr_ch, tailq);
spdk_put_io_channel(pg_ch);
return rc;
spdk_put_io_channel(spdk_io_channel_from_ctx(ctrlr_ch->group));
}
static void
@ -2089,8 +2103,6 @@ bdev_nvme_destroy_ctrlr_channel_cb(void *io_device, void *ctx_buf)
{
struct nvme_ctrlr_channel *ctrlr_ch = ctx_buf;
assert(ctrlr_ch->group != NULL);
_bdev_nvme_clear_io_path_cache(ctrlr_ch);
if (ctrlr_ch->qpair != NULL) {
@ -2098,9 +2110,7 @@ bdev_nvme_destroy_ctrlr_channel_cb(void *io_device, void *ctx_buf)
ctrlr_ch->qpair = NULL;
}
TAILQ_REMOVE(&ctrlr_ch->group->ctrlr_ch_list, ctrlr_ch, tailq);
spdk_put_io_channel(spdk_io_channel_from_ctx(ctrlr_ch->group));
nvme_qpair_delete(ctrlr_ch);
}
static void