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bdev/nvme: Factor out start operations from failover() and delete_ctrlr()

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The following patches will add mutex for bdev_nvme_delete() to improve
handling race conditions. This refactoring make such change easier.

Signed-off-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Change-Id: I8971684a708bce89872f08f75db86eb3b723f380
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/16821
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Shuhei Matsumoto 2023-02-15 15:23:04 +09:00 committed by Tomasz Zawadzki
parent f38d2f6a8e
commit 511daff348
1 changed files with 37 additions and 16 deletions
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49
module/bdev/nvme/bdev_nvme.c
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@ -2226,17 +2226,14 @@ bdev_nvme_reset_io(struct nvme_bdev_channel *nbdev_ch, struct nvme_bdev_io *bio)
}
static int
bdev_nvme_failover(struct nvme_ctrlr *nvme_ctrlr, bool remove)
bdev_nvme_failover_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool remove)
{
pthread_mutex_lock(&nvme_ctrlr->mutex);
if (nvme_ctrlr->destruct) {
pthread_mutex_unlock(&nvme_ctrlr->mutex);
/* Don't bother resetting if the controller is in the process of being destructed. */
return -ENXIO;
}
if (nvme_ctrlr->resetting) {
pthread_mutex_unlock(&nvme_ctrlr->mutex);
SPDK_NOTICELOG("Unable to perform reset, already in progress.\n");
return -EBUSY;
}
@ -2244,11 +2241,10 @@ bdev_nvme_failover(struct nvme_ctrlr *nvme_ctrlr, bool remove)
bdev_nvme_failover_trid(nvme_ctrlr, remove);
if (nvme_ctrlr->reconnect_is_delayed) {
pthread_mutex_unlock(&nvme_ctrlr->mutex);
SPDK_NOTICELOG("Reconnect is already scheduled.\n");
/* We rely on the next reconnect for the failover. */
return 0;
return -EALREADY;
}
nvme_ctrlr->resetting = true;
@ -2256,10 +2252,25 @@ bdev_nvme_failover(struct nvme_ctrlr *nvme_ctrlr, bool remove)
assert(nvme_ctrlr->reset_start_tsc == 0);
nvme_ctrlr->reset_start_tsc = spdk_get_ticks();
return 0;
}
static int
bdev_nvme_failover(struct nvme_ctrlr *nvme_ctrlr, bool remove)
{
int rc;
pthread_mutex_lock(&nvme_ctrlr->mutex);
rc = bdev_nvme_failover_unsafe(nvme_ctrlr, remove);
pthread_mutex_unlock(&nvme_ctrlr->mutex);
if (rc == 0) {
spdk_thread_send_msg(nvme_ctrlr->thread, _bdev_nvme_reset, nvme_ctrlr);
return 0;
} else if (rc == -EALREADY) {
rc = 0;
}
return rc;
}
static int bdev_nvme_unmap(struct nvme_bdev_io *bio, uint64_t offset_blocks,
@ -4752,23 +4763,19 @@ _nvme_ctrlr_destruct(void *ctx)
}
static int
bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
bdev_nvme_delete_ctrlr_unsafe(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
{
struct nvme_probe_skip_entry *entry;
pthread_mutex_lock(&nvme_ctrlr->mutex);
/* The controller's destruction was already started */
if (nvme_ctrlr->destruct) {
pthread_mutex_unlock(&nvme_ctrlr->mutex);
return 0;
return -EALREADY;
}
if (!hotplug &&
nvme_ctrlr->active_path_id->trid.trtype == SPDK_NVME_TRANSPORT_PCIE) {
entry = calloc(1, sizeof(*entry));
if (!entry) {
pthread_mutex_unlock(&nvme_ctrlr->mutex);
return -ENOMEM;
}
entry->trid = nvme_ctrlr->active_path_id->trid;
@ -4776,11 +4783,25 @@ bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
}
nvme_ctrlr->destruct = true;
return 0;
}
static int
bdev_nvme_delete_ctrlr(struct nvme_ctrlr *nvme_ctrlr, bool hotplug)
{
int rc;
pthread_mutex_lock(&nvme_ctrlr->mutex);
rc = bdev_nvme_delete_ctrlr_unsafe(nvme_ctrlr, hotplug);
pthread_mutex_unlock(&nvme_ctrlr->mutex);
if (rc == 0) {
_nvme_ctrlr_destruct(nvme_ctrlr);
} else if (rc == -EALREADY) {
rc = 0;
}
return 0;
return rc;
}
static void