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bdev/nvme: use mutex to protect 'resetting' member

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This isn't in the performance path, so using the mutex
here makes it a bit more consistent with other ctrlr
members such as 'destruct'.

This prepares for a future patch which will defer
ctrlr destruction on removal if a reset is in progress.

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

Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/1252 (master)

(cherry picked from commit 2571cbd807)
Change-Id: Ica019cd90dc3b46ef6a13dd311054dbdc95855aa
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/1304
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Jim Harris 2020-03-12 10:39:27 -07:00 committed by Tomasz Zawadzki
parent 77a53c2c00
commit b030befb1d
1 changed files with 9 additions and 2 deletions
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11
module/bdev/nvme/bdev_nvme.c
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@ -328,7 +328,9 @@ _bdev_nvme_reset_complete(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, int rc)
SPDK_NOTICELOG("Resetting controller successful.\n");
}
__atomic_clear(&nvme_bdev_ctrlr->resetting, __ATOMIC_RELAXED);
pthread_mutex_lock(&g_bdev_nvme_mutex);
nvme_bdev_ctrlr->resetting = false;
pthread_mutex_unlock(&g_bdev_nvme_mutex);
/* Make sure we clear any pending resets before returning. */
spdk_for_each_channel(nvme_bdev_ctrlr,
_bdev_nvme_complete_pending_resets,
@ -425,7 +427,11 @@ bdev_nvme_reset(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, struct nvme_bdev_io *bi
struct spdk_io_channel *ch;
struct nvme_io_channel *nvme_ch;
if (__atomic_test_and_set(&nvme_bdev_ctrlr->resetting, __ATOMIC_RELAXED)) {
pthread_mutex_lock(&g_bdev_nvme_mutex);
if (!nvme_bdev_ctrlr->resetting) {
nvme_bdev_ctrlr->resetting = true;
} else {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
SPDK_NOTICELOG("Unable to perform reset, already in progress.\n");
/*
* The internal reset calls won't be queued. This is on purpose so that we don't
@ -442,6 +448,7 @@ bdev_nvme_reset(struct nvme_bdev_ctrlr *nvme_bdev_ctrlr, struct nvme_bdev_io *bi
return 0;
}
pthread_mutex_unlock(&g_bdev_nvme_mutex);
/* First, delete all NVMe I/O queue pairs. */
spdk_for_each_channel(nvme_bdev_ctrlr,
_bdev_nvme_reset_destroy_qpair,