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bdev_nvme: retain nvme_ctrl after delete_bdev

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When deleting bdev of NVMe type by delete_bdev rpc,
if the bdev is the last one NVMe bdev of the NVMe
controller, the NVMe controller will be deleted too.
With this change, the nvme_ctrlr will be retained
inside SPDK app after delete_bdev rpc. And the
nvme_ctrlr can be deleted by delete_nvme_controller
rpc.

Change-Id: Icad6c24d342b9e4bcb69ec7a4b1a352c2df113f2
Signed-off-by: Liu Xiaodong <xiaodong.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/431582
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Liu Xiaodong 2018-10-31 21:22:56 -04:00 committed by Jim Harris
parent 1ab092348a
commit 8fa8310be4
2 changed files with 28 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
lib/bdev/nvme/bdev_nvme.c
View File

@ -260,6 +260,19 @@ bdev_nvme_unregister_cb(void *io_device)
spdk_nvme_detach(ctrlr);
}
static void
bdev_nvme_ctrlr_destruct(struct nvme_ctrlr *nvme_ctrlr)
{
pthread_mutex_lock(&g_bdev_nvme_mutex);
TAILQ_REMOVE(&g_nvme_ctrlrs, nvme_ctrlr, tailq);
pthread_mutex_unlock(&g_bdev_nvme_mutex);
spdk_io_device_unregister(nvme_ctrlr->ctrlr, bdev_nvme_unregister_cb);
spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
free(nvme_ctrlr->name);
free(nvme_ctrlr->bdevs);
free(nvme_ctrlr);
}
static int
bdev_nvme_destruct(void *ctx)
{
@ -270,20 +283,16 @@ bdev_nvme_destruct(void *ctx)
nvme_ctrlr->ref--;
free(nvme_disk->disk.name);
memset(nvme_disk, 0, sizeof(*nvme_disk));
if (nvme_ctrlr->ref == 0) {
TAILQ_REMOVE(&g_nvme_ctrlrs, nvme_ctrlr, tailq);
if (nvme_ctrlr->ref == 0 && nvme_ctrlr->destruct) {
/* Clear destruct sign in case of reentering controller destruct */
nvme_ctrlr->destruct = false;
pthread_mutex_unlock(&g_bdev_nvme_mutex);
spdk_io_device_unregister(nvme_ctrlr->ctrlr, bdev_nvme_unregister_cb);
spdk_poller_unregister(&nvme_ctrlr->adminq_timer_poller);
free(nvme_ctrlr->name);
free(nvme_ctrlr->bdevs);
free(nvme_ctrlr);
bdev_nvme_ctrlr_destruct(nvme_ctrlr);
return 0;
}
pthread_mutex_unlock(&g_bdev_nvme_mutex);
return 0;
}
static int
@ -1084,6 +1093,7 @@ remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr)
pthread_mutex_lock(&g_bdev_nvme_mutex);
TAILQ_FOREACH(nvme_ctrlr, &g_nvme_ctrlrs, tailq) {
if (nvme_ctrlr->ctrlr == ctrlr) {
nvme_ctrlr->destruct = true;
pthread_mutex_unlock(&g_bdev_nvme_mutex);
for (i = 0; i < nvme_ctrlr->num_ns; i++) {
uint32_t nsid = i + 1;
@ -1094,6 +1104,15 @@ remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr)
spdk_bdev_unregister(&nvme_bdev->disk, NULL, NULL);
}
}
pthread_mutex_lock(&g_bdev_nvme_mutex);
if (nvme_ctrlr->ref == 0 && nvme_ctrlr->destruct) {
nvme_ctrlr->destruct = false;
pthread_mutex_unlock(&g_bdev_nvme_mutex);
bdev_nvme_ctrlr_destruct(nvme_ctrlr);
} else {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
}
return;
}
}

1
lib/bdev/nvme/bdev_nvme.h
View File

@ -65,6 +65,7 @@ struct nvme_ctrlr {
struct spdk_nvme_transport_id trid;
char *name;
int ref;
bool destruct;
uint32_t num_ns;
/** Array of bdevs indexed by nsid - 1 */
struct nvme_bdev *bdevs;