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bdev/nvme: use arrayed bdevs structure for each NVMe controller

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Since the number of Namespaces for each NVMe controller will
not change during the lifetime, and each Namespace will only
construct one block device, For the purpose to support NS
attribute event in bdev_nvme module, using arrayed data
structure makes the implementation much easier.

Change-Id: Ia3a64cd1e8d59937f0c91daaee9c5bd28708402b
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/415115
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Changpeng Liu 2018-06-12 05:10:28 -04:00 committed by Jim Harris
parent 69679c8033
commit e0b1704ae0
2 changed files with 50 additions and 29 deletions
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54
lib/bdev/nvme/bdev_nvme.c
View File

@ -109,7 +109,6 @@ static struct spdk_poller *g_hotplug_poller;
static pthread_mutex_t g_bdev_nvme_mutex = PTHREAD_MUTEX_INITIALIZER;
static TAILQ_HEAD(, nvme_ctrlr) g_nvme_ctrlrs = TAILQ_HEAD_INITIALIZER(g_nvme_ctrlrs);
static TAILQ_HEAD(, nvme_bdev) g_nvme_bdevs = TAILQ_HEAD_INITIALIZER(g_nvme_bdevs);
static int nvme_ctrlr_create_bdevs(struct nvme_ctrlr *nvme_ctrlr);
static int bdev_nvme_library_init(void);
@ -227,16 +226,16 @@ bdev_nvme_destruct(void *ctx)
struct nvme_ctrlr *nvme_ctrlr = nvme_disk->nvme_ctrlr;
pthread_mutex_lock(&g_bdev_nvme_mutex);
TAILQ_REMOVE(&g_nvme_bdevs, nvme_disk, link);
nvme_ctrlr->ref--;
free(nvme_disk->disk.name);
free(nvme_disk);
memset(nvme_disk, 0, sizeof(*nvme_disk));
if (nvme_ctrlr->ref == 0) {
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);
return 0;
}
@ -822,6 +821,14 @@ attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
free((void *)name);
return;
}
nvme_ctrlr->num_ns = spdk_nvme_ctrlr_get_num_ns(ctrlr);
nvme_ctrlr->bdevs = calloc(nvme_ctrlr->num_ns, sizeof(struct nvme_bdev));
if (!nvme_ctrlr->bdevs) {
SPDK_ERRLOG("Failed to allocate block devices struct\n");
free(nvme_ctrlr);
free((void *)name);
return;
}
nvme_ctrlr->adminq_timer_poller = NULL;
nvme_ctrlr->ctrlr = ctrlr;
@ -853,14 +860,24 @@ attach_cb(void *cb_ctx, const struct spdk_nvme_transport_id *trid,
static void
remove_cb(void *cb_ctx, struct spdk_nvme_ctrlr *ctrlr)
{
struct nvme_bdev *nvme_bdev, *btmp;
uint32_t i;
struct nvme_ctrlr *nvme_ctrlr;
struct nvme_bdev *nvme_bdev;
pthread_mutex_lock(&g_bdev_nvme_mutex);
TAILQ_FOREACH_SAFE(nvme_bdev, &g_nvme_bdevs, link, btmp) {
if (nvme_bdev->nvme_ctrlr->ctrlr == ctrlr) {
TAILQ_FOREACH(nvme_ctrlr, &g_nvme_ctrlrs, tailq) {
if (nvme_ctrlr->ctrlr == ctrlr) {
pthread_mutex_unlock(&g_bdev_nvme_mutex);
for (i = 0; i < nvme_ctrlr->num_ns; i++) {
uint32_t nsid = i + 1;
nvme_bdev = &nvme_ctrlr->bdevs[nsid - 1];
assert(nvme_bdev->id == nsid);
if (nvme_bdev->active) {
spdk_bdev_unregister(&nvme_bdev->disk, NULL, NULL);
pthread_mutex_lock(&g_bdev_nvme_mutex);
}
}
return;
}
}
pthread_mutex_unlock(&g_bdev_nvme_mutex);
@ -884,6 +901,7 @@ spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,
struct nvme_probe_ctx *probe_ctx;
struct nvme_ctrlr *nvme_ctrlr;
struct nvme_bdev *nvme_bdev;
uint32_t i, nsid;
size_t j;
if (nvme_ctrlr_get(trid) != NULL) {
@ -918,8 +936,13 @@ spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,
* There can be more than one bdev per NVMe controller since one bdev is created per namespace.
*/
j = 0;
TAILQ_FOREACH(nvme_bdev, &g_nvme_bdevs, link) {
if (nvme_bdev->nvme_ctrlr == nvme_ctrlr) {
for (i = 0; i < nvme_ctrlr->num_ns; i++) {
nsid = i + 1;
nvme_bdev = &nvme_ctrlr->bdevs[nsid - 1];
if (!nvme_bdev->active) {
continue;
}
assert(nvme_bdev->id == nsid);
if (j < *count) {
names[j] = nvme_bdev->disk.name;
j++;
@ -930,7 +953,7 @@ spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,
return -1;
}
}
}
*count = j;
free(probe_ctx);
@ -1115,10 +1138,8 @@ nvme_ctrlr_create_bdevs(struct nvme_ctrlr *nvme_ctrlr)
continue;
}
bdev = calloc(1, sizeof(*bdev));
if (!bdev) {
break;
}
bdev = &nvme_ctrlr->bdevs[nsid - 1];
bdev->id = nsid;
bdev->nvme_ctrlr = nvme_ctrlr;
bdev->ns = ns;
@ -1126,7 +1147,6 @@ nvme_ctrlr_create_bdevs(struct nvme_ctrlr *nvme_ctrlr)
bdev->disk.name = spdk_sprintf_alloc("%sn%d", nvme_ctrlr->name, spdk_nvme_ns_get_id(ns));
if (!bdev->disk.name) {
free(bdev);
break;
}
bdev->disk.product_name = "NVMe disk";
@ -1151,11 +1171,9 @@ nvme_ctrlr_create_bdevs(struct nvme_ctrlr *nvme_ctrlr)
rc = spdk_bdev_register(&bdev->disk);
if (rc) {
free(bdev->disk.name);
free(bdev);
break;
}
TAILQ_INSERT_TAIL(&g_nvme_bdevs, bdev, link);
bdev->active = true;
bdev_created++;
}

7
lib/bdev/nvme/bdev_nvme.h
View File

@ -52,6 +52,9 @@ struct nvme_ctrlr {
struct spdk_nvme_transport_id trid;
char *name;
int ref;
uint32_t num_ns;
/** Array of bdevs indexed by nsid - 1 */
struct nvme_bdev *bdevs;
struct spdk_poller *adminq_timer_poller;
@ -62,9 +65,9 @@ struct nvme_ctrlr {
struct nvme_bdev {
struct spdk_bdev disk;
struct nvme_ctrlr *nvme_ctrlr;
uint32_t id;
bool active;
struct spdk_nvme_ns *ns;
TAILQ_ENTRY(nvme_bdev) link;
};
int spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,