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bdev/nvme: Fix bdev_nvme_delete() to call ctrlr_get_by_name() and set destruct to true in a lock

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bdev_nvme_delete() had called nvme_bdev_ctrlr_get_by_name() and
then called remove_cb(). But nvme_bdev_ctrlr_get_by_name() had not
been guarded by lock and remove_cb() parsed the list again by using
spdk_nvme_ctrlr as a key.

These were not safe and efficient.

This patch refines bdev_nvme_delete() to inline remove_cb() into
it and acquire mutex before calling nvme_bdev_ctrlr_get_by_name().

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: Ibf39859809efa6f22899353c53b7b1eef58aa470
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4842
Community-CI: Broadcom CI
Community-CI: Mellanox Build Bot
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This commit is contained in:
Shuhei Matsumoto 2020-10-22 21:03:05 +09:00 committed by Tomasz Zawadzki
parent edbb7ace72
commit 4e8f5d39ec
1 changed files with 26 additions and 2 deletions
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28
module/bdev/nvme/bdev_nvme.c
View File

@ -1984,29 +1984,53 @@ bdev_nvme_create(struct spdk_nvme_transport_id *trid,
int
bdev_nvme_delete(const char *name)
{
struct nvme_bdev_ctrlr *nvme_bdev_ctrlr = NULL;
struct nvme_bdev_ctrlr *nvme_bdev_ctrlr;
struct nvme_probe_skip_entry *entry;
if (name == NULL) {
return -EINVAL;
}
pthread_mutex_lock(&g_bdev_nvme_mutex);
nvme_bdev_ctrlr = nvme_bdev_ctrlr_get_by_name(name);
if (nvme_bdev_ctrlr == NULL) {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
SPDK_ERRLOG("Failed to find NVMe controller\n");
return -ENODEV;
}
/* The controller's destruction was already started */
if (nvme_bdev_ctrlr->destruct) {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
return 0;
}
if (nvme_bdev_ctrlr->connected_trid->trtype == SPDK_NVME_TRANSPORT_PCIE) {
entry = calloc(1, sizeof(*entry));
if (!entry) {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
return -ENOMEM;
}
entry->trid = *nvme_bdev_ctrlr->connected_trid;
TAILQ_INSERT_TAIL(&g_skipped_nvme_ctrlrs, entry, tailq);
}
remove_cb(NULL, nvme_bdev_ctrlr->ctrlr);
nvme_bdev_ctrlr->destruct = true;
pthread_mutex_unlock(&g_bdev_nvme_mutex);
nvme_ctrlr_depopulate_namespaces(nvme_bdev_ctrlr);
pthread_mutex_lock(&g_bdev_nvme_mutex);
assert(nvme_bdev_ctrlr->ref > 0);
nvme_bdev_ctrlr->ref--;
if (nvme_bdev_ctrlr->ref == 0) {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
nvme_bdev_ctrlr_destruct(nvme_bdev_ctrlr);
} else {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
}
return 0;
}