Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 1582 insertions, 0 deletions

diff --git a/src/spdk/lib/lvol/Makefile b/src/spdk/lib/lvol/Makefile
new file mode 100644
index 000000000..c370a19a5
--- /dev/null
+++ b/src/spdk/lib/lvol/Makefile
@@ -0,0 +1,45 @@
+#
+#  BSD LICENSE
+#
+#  Copyright (c) Intel Corporation.
+#  All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions
+#  are met:
+#
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in
+#      the documentation and/or other materials provided with the
+#      distribution.
+#    * Neither the name of Intel Corporation nor the names of its
+#      contributors may be used to endorse or promote products derived
+#      from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..)
+include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
+
+SO_VER := 2
+SO_MINOR := 0
+
+C_SRCS = lvol.c
+LIBNAME = lvol
+
+SPDK_MAP_FILE = $(abspath $(CURDIR)/spdk_lvol.map)
+
+include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk
diff --git a/src/spdk/lib/lvol/lvol.c b/src/spdk/lib/lvol/lvol.c
new file mode 100644
index 000000000..50b42d7b0
--- /dev/null
+++ b/src/spdk/lib/lvol/lvol.c
@@ -0,0 +1,1509 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "spdk_internal/lvolstore.h"
+#include "spdk_internal/log.h"
+#include "spdk/string.h"
+#include "spdk/thread.h"
+#include "spdk/blob_bdev.h"
+#include "spdk/util.h"
+
+/* Default blob channel opts for lvol */
+#define SPDK_LVOL_BLOB_OPTS_CHANNEL_OPS 512
+
+#define LVOL_NAME "name"
+
+SPDK_LOG_REGISTER_COMPONENT("lvol", SPDK_LOG_LVOL)
+
+static TAILQ_HEAD(, spdk_lvol_store) g_lvol_stores = TAILQ_HEAD_INITIALIZER(g_lvol_stores);
+static pthread_mutex_t g_lvol_stores_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static int
+add_lvs_to_list(struct spdk_lvol_store *lvs)
+{
+	struct spdk_lvol_store *tmp;
+	bool name_conflict = false;
+
+	pthread_mutex_lock(&g_lvol_stores_mutex);
+	TAILQ_FOREACH(tmp, &g_lvol_stores, link) {
+		if (!strncmp(lvs->name, tmp->name, SPDK_LVS_NAME_MAX)) {
+			name_conflict = true;
+			break;
+		}
+	}
+	if (!name_conflict) {
+		lvs->on_list = true;
+		TAILQ_INSERT_TAIL(&g_lvol_stores, lvs, link);
+	}
+	pthread_mutex_unlock(&g_lvol_stores_mutex);
+
+	return name_conflict ? -1 : 0;
+}
+
+static void
+lvs_free(struct spdk_lvol_store *lvs)
+{
+	pthread_mutex_lock(&g_lvol_stores_mutex);
+	if (lvs->on_list) {
+		TAILQ_REMOVE(&g_lvol_stores, lvs, link);
+	}
+	pthread_mutex_unlock(&g_lvol_stores_mutex);
+
+	free(lvs);
+}
+
+static void
+lvol_free(struct spdk_lvol *lvol)
+{
+	free(lvol);
+}
+
+static void
+lvol_open_cb(void *cb_arg, struct spdk_blob *blob, int lvolerrno)
+{
+	struct spdk_lvol_with_handle_req *req = cb_arg;
+	struct spdk_lvol *lvol = req->lvol;
+
+	if (lvolerrno != 0) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Failed to open lvol %s\n", lvol->unique_id);
+		goto end;
+	}
+
+	lvol->ref_count++;
+	lvol->blob = blob;
+end:
+	req->cb_fn(req->cb_arg, lvol, lvolerrno);
+	free(req);
+}
+
+void
+spdk_lvol_open(struct spdk_lvol *lvol, spdk_lvol_op_with_handle_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_with_handle_req *req;
+	struct spdk_blob_open_opts opts;
+
+	assert(cb_fn != NULL);
+
+	if (lvol == NULL) {
+		SPDK_ERRLOG("lvol does not exist\n");
+		cb_fn(cb_arg, NULL, -ENODEV);
+		return;
+	}
+
+	if (lvol->action_in_progress == true) {
+		SPDK_ERRLOG("Cannot open lvol - operations on lvol pending\n");
+		cb_fn(cb_arg, lvol, -EBUSY);
+		return;
+	}
+
+	if (lvol->ref_count > 0) {
+		lvol->ref_count++;
+		cb_fn(cb_arg, lvol, 0);
+		return;
+	}
+
+	req = calloc(1, sizeof(*req));
+	if (req == NULL) {
+		SPDK_ERRLOG("Cannot alloc memory for request structure\n");
+		cb_fn(cb_arg, NULL, -ENOMEM);
+		return;
+	}
+
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->lvol = lvol;
+
+	spdk_blob_open_opts_init(&opts);
+	opts.clear_method = lvol->clear_method;
+
+	spdk_bs_open_blob_ext(lvol->lvol_store->blobstore, lvol->blob_id, &opts, lvol_open_cb, req);
+}
+
+static void
+bs_unload_with_error_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = (struct spdk_lvs_with_handle_req *)cb_arg;
+
+	req->cb_fn(req->cb_arg, NULL, req->lvserrno);
+	free(req);
+}
+
+static void
+load_next_lvol(void *cb_arg, struct spdk_blob *blob, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob_store *bs = lvs->blobstore;
+	struct spdk_lvol *lvol, *tmp;
+	spdk_blob_id blob_id;
+	const char *attr;
+	size_t value_len;
+	int rc;
+
+	if (lvolerrno == -ENOENT) {
+		/* Finished iterating */
+		req->cb_fn(req->cb_arg, lvs, 0);
+		free(req);
+		return;
+	} else if (lvolerrno < 0) {
+		SPDK_ERRLOG("Failed to fetch blobs list\n");
+		req->lvserrno = lvolerrno;
+		goto invalid;
+	}
+
+	blob_id = spdk_blob_get_id(blob);
+
+	if (blob_id == lvs->super_blob_id) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "found superblob %"PRIu64"\n", (uint64_t)blob_id);
+		spdk_bs_iter_next(bs, blob, load_next_lvol, req);
+		return;
+	}
+
+	lvol = calloc(1, sizeof(*lvol));
+	if (!lvol) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol base pointer\n");
+		req->lvserrno = -ENOMEM;
+		goto invalid;
+	}
+
+	lvol->blob = blob;
+	lvol->blob_id = blob_id;
+	lvol->lvol_store = lvs;
+	lvol->thin_provision = spdk_blob_is_thin_provisioned(blob);
+
+	rc = spdk_blob_get_xattr_value(blob, "uuid", (const void **)&attr, &value_len);
+	if (rc != 0 || value_len != SPDK_UUID_STRING_LEN || attr[SPDK_UUID_STRING_LEN - 1] != '\0' ||
+	    spdk_uuid_parse(&lvol->uuid, attr) != 0) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Missing or corrupt lvol uuid\n");
+		memset(&lvol->uuid, 0, sizeof(lvol->uuid));
+	}
+	spdk_uuid_fmt_lower(lvol->uuid_str, sizeof(lvol->uuid_str), &lvol->uuid);
+
+	if (!spdk_mem_all_zero(&lvol->uuid, sizeof(lvol->uuid))) {
+		snprintf(lvol->unique_id, sizeof(lvol->unique_id), "%s", lvol->uuid_str);
+	} else {
+		spdk_uuid_fmt_lower(lvol->unique_id, sizeof(lvol->unique_id), &lvol->lvol_store->uuid);
+		value_len = strlen(lvol->unique_id);
+		snprintf(lvol->unique_id + value_len, sizeof(lvol->unique_id) - value_len, "_%"PRIu64,
+			 (uint64_t)blob_id);
+	}
+
+	rc = spdk_blob_get_xattr_value(blob, "name", (const void **)&attr, &value_len);
+	if (rc != 0 || value_len > SPDK_LVOL_NAME_MAX) {
+		SPDK_ERRLOG("Cannot assign lvol name\n");
+		lvol_free(lvol);
+		req->lvserrno = -EINVAL;
+		goto invalid;
+	}
+
+	snprintf(lvol->name, sizeof(lvol->name), "%s", attr);
+
+	TAILQ_INSERT_TAIL(&lvs->lvols, lvol, link);
+
+	lvs->lvol_count++;
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "added lvol %s (%s)\n", lvol->unique_id, lvol->uuid_str);
+
+	spdk_bs_iter_next(bs, blob, load_next_lvol, req);
+
+	return;
+
+invalid:
+	TAILQ_FOREACH_SAFE(lvol, &lvs->lvols, link, tmp) {
+		TAILQ_REMOVE(&lvs->lvols, lvol, link);
+		free(lvol);
+	}
+
+	lvs_free(lvs);
+	spdk_bs_unload(bs, bs_unload_with_error_cb, req);
+}
+
+static void
+close_super_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = (struct spdk_lvs_with_handle_req *)cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob_store *bs = lvs->blobstore;
+
+	if (lvolerrno != 0) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Could not close super blob\n");
+		lvs_free(lvs);
+		req->lvserrno = -ENODEV;
+		spdk_bs_unload(bs, bs_unload_with_error_cb, req);
+		return;
+	}
+
+	/* Start loading lvols */
+	spdk_bs_iter_first(lvs->blobstore, load_next_lvol, req);
+}
+
+static void
+close_super_blob_with_error_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = (struct spdk_lvs_with_handle_req *)cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob_store *bs = lvs->blobstore;
+
+	lvs_free(lvs);
+
+	spdk_bs_unload(bs, bs_unload_with_error_cb, req);
+}
+
+static void
+lvs_read_uuid(void *cb_arg, struct spdk_blob *blob, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = (struct spdk_lvs_with_handle_req *)cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob_store *bs = lvs->blobstore;
+	const char *attr;
+	size_t value_len;
+	int rc;
+
+	if (lvolerrno != 0) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Could not open super blob\n");
+		lvs_free(lvs);
+		req->lvserrno = -ENODEV;
+		spdk_bs_unload(bs, bs_unload_with_error_cb, req);
+		return;
+	}
+
+	rc = spdk_blob_get_xattr_value(blob, "uuid", (const void **)&attr, &value_len);
+	if (rc != 0 || value_len != SPDK_UUID_STRING_LEN || attr[SPDK_UUID_STRING_LEN - 1] != '\0') {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "missing or incorrect UUID\n");
+		req->lvserrno = -EINVAL;
+		spdk_blob_close(blob, close_super_blob_with_error_cb, req);
+		return;
+	}
+
+	if (spdk_uuid_parse(&lvs->uuid, attr)) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "incorrect UUID '%s'\n", attr);
+		req->lvserrno = -EINVAL;
+		spdk_blob_close(blob, close_super_blob_with_error_cb, req);
+		return;
+	}
+
+	rc = spdk_blob_get_xattr_value(blob, "name", (const void **)&attr, &value_len);
+	if (rc != 0 || value_len > SPDK_LVS_NAME_MAX) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "missing or invalid name\n");
+		req->lvserrno = -EINVAL;
+		spdk_blob_close(blob, close_super_blob_with_error_cb, req);
+		return;
+	}
+
+	snprintf(lvs->name, sizeof(lvs->name), "%s", attr);
+
+	rc = add_lvs_to_list(lvs);
+	if (rc) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "lvolstore with name %s already exists\n", lvs->name);
+		req->lvserrno = -EEXIST;
+		spdk_blob_close(blob, close_super_blob_with_error_cb, req);
+		return;
+	}
+
+	lvs->super_blob_id = spdk_blob_get_id(blob);
+
+	spdk_blob_close(blob, close_super_cb, req);
+}
+
+static void
+lvs_open_super(void *cb_arg, spdk_blob_id blobid, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = (struct spdk_lvs_with_handle_req *)cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob_store *bs = lvs->blobstore;
+
+	if (lvolerrno != 0) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Super blob not found\n");
+		lvs_free(lvs);
+		req->lvserrno = -ENODEV;
+		spdk_bs_unload(bs, bs_unload_with_error_cb, req);
+		return;
+	}
+
+	spdk_bs_open_blob(bs, blobid, lvs_read_uuid, req);
+}
+
+static void
+lvs_load_cb(void *cb_arg, struct spdk_blob_store *bs, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = (struct spdk_lvs_with_handle_req *)cb_arg;
+	struct spdk_lvol_store *lvs;
+
+	if (lvolerrno != 0) {
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		free(req);
+		return;
+	}
+
+	lvs = calloc(1, sizeof(*lvs));
+	if (lvs == NULL) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol store\n");
+		spdk_bs_unload(bs, bs_unload_with_error_cb, req);
+		return;
+	}
+
+	lvs->blobstore = bs;
+	lvs->bs_dev = req->bs_dev;
+	TAILQ_INIT(&lvs->lvols);
+	TAILQ_INIT(&lvs->pending_lvols);
+
+	req->lvol_store = lvs;
+
+	spdk_bs_get_super(bs, lvs_open_super, req);
+}
+
+static void
+lvs_bs_opts_init(struct spdk_bs_opts *opts)
+{
+	spdk_bs_opts_init(opts);
+	opts->max_channel_ops = SPDK_LVOL_BLOB_OPTS_CHANNEL_OPS;
+}
+
+void
+spdk_lvs_load(struct spdk_bs_dev *bs_dev, spdk_lvs_op_with_handle_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvs_with_handle_req *req;
+	struct spdk_bs_opts opts = {};
+
+	assert(cb_fn != NULL);
+
+	if (bs_dev == NULL) {
+		SPDK_ERRLOG("Blobstore device does not exist\n");
+		cb_fn(cb_arg, NULL, -ENODEV);
+		return;
+	}
+
+	req = calloc(1, sizeof(*req));
+	if (req == NULL) {
+		SPDK_ERRLOG("Cannot alloc memory for request structure\n");
+		cb_fn(cb_arg, NULL, -ENOMEM);
+		return;
+	}
+
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->bs_dev = bs_dev;
+
+	lvs_bs_opts_init(&opts);
+	snprintf(opts.bstype.bstype, sizeof(opts.bstype.bstype), "LVOLSTORE");
+
+	spdk_bs_load(bs_dev, &opts, lvs_load_cb, req);
+}
+
+static void
+remove_bs_on_error_cb(void *cb_arg, int bserrno)
+{
+}
+
+static void
+super_create_close_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+
+	if (lvolerrno < 0) {
+		SPDK_ERRLOG("Lvol store init failed: could not close super blob\n");
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		spdk_bs_destroy(lvs->blobstore, remove_bs_on_error_cb, NULL);
+		lvs_free(lvs);
+		free(req);
+		return;
+	}
+
+	req->cb_fn(req->cb_arg, lvs, lvolerrno);
+	free(req);
+}
+
+static void
+super_blob_set_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob *blob = lvs->super_blob;
+
+	if (lvolerrno < 0) {
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		SPDK_ERRLOG("Lvol store init failed: could not set uuid for super blob\n");
+		spdk_bs_destroy(lvs->blobstore, remove_bs_on_error_cb, NULL);
+		lvs_free(lvs);
+		free(req);
+		return;
+	}
+
+	spdk_blob_close(blob, super_create_close_cb, req);
+}
+
+static void
+super_blob_init_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob *blob = lvs->super_blob;
+	char uuid[SPDK_UUID_STRING_LEN];
+
+	if (lvolerrno < 0) {
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		SPDK_ERRLOG("Lvol store init failed: could not set super blob\n");
+		spdk_bs_destroy(lvs->blobstore, remove_bs_on_error_cb, NULL);
+		lvs_free(lvs);
+		free(req);
+		return;
+	}
+
+	spdk_uuid_fmt_lower(uuid, sizeof(uuid), &lvs->uuid);
+
+	spdk_blob_set_xattr(blob, "uuid", uuid, sizeof(uuid));
+	spdk_blob_set_xattr(blob, "name", lvs->name, strnlen(lvs->name, SPDK_LVS_NAME_MAX) + 1);
+	spdk_blob_sync_md(blob, super_blob_set_cb, req);
+}
+
+static void
+super_blob_create_open_cb(void *cb_arg, struct spdk_blob *blob, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+
+	if (lvolerrno < 0) {
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		SPDK_ERRLOG("Lvol store init failed: could not open super blob\n");
+		spdk_bs_destroy(lvs->blobstore, remove_bs_on_error_cb, NULL);
+		lvs_free(lvs);
+		free(req);
+		return;
+	}
+
+	lvs->super_blob = blob;
+	lvs->super_blob_id = spdk_blob_get_id(blob);
+
+	spdk_bs_set_super(lvs->blobstore, lvs->super_blob_id, super_blob_init_cb, req);
+}
+
+static void
+super_blob_create_cb(void *cb_arg, spdk_blob_id blobid, int lvolerrno)
+{
+	struct spdk_lvs_with_handle_req *req = cb_arg;
+	struct spdk_lvol_store *lvs = req->lvol_store;
+	struct spdk_blob_store *bs;
+
+	if (lvolerrno < 0) {
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		SPDK_ERRLOG("Lvol store init failed: could not create super blob\n");
+		spdk_bs_destroy(lvs->blobstore, remove_bs_on_error_cb, NULL);
+		lvs_free(lvs);
+		free(req);
+		return;
+	}
+
+	bs = req->lvol_store->blobstore;
+
+	spdk_bs_open_blob(bs, blobid, super_blob_create_open_cb, req);
+}
+
+static void
+lvs_init_cb(void *cb_arg, struct spdk_blob_store *bs, int lvserrno)
+{
+	struct spdk_lvs_with_handle_req *lvs_req = cb_arg;
+	struct spdk_lvol_store *lvs = lvs_req->lvol_store;
+
+	if (lvserrno != 0) {
+		assert(bs == NULL);
+		lvs_req->cb_fn(lvs_req->cb_arg, NULL, lvserrno);
+		SPDK_ERRLOG("Lvol store init failed: could not initialize blobstore\n");
+		lvs_free(lvs);
+		free(lvs_req);
+		return;
+	}
+
+	assert(bs != NULL);
+	lvs->blobstore = bs;
+	TAILQ_INIT(&lvs->lvols);
+	TAILQ_INIT(&lvs->pending_lvols);
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Lvol store initialized\n");
+
+	/* create super blob */
+	spdk_bs_create_blob(lvs->blobstore, super_blob_create_cb, lvs_req);
+}
+
+void
+spdk_lvs_opts_init(struct spdk_lvs_opts *o)
+{
+	o->cluster_sz = SPDK_LVS_OPTS_CLUSTER_SZ;
+	o->clear_method = LVS_CLEAR_WITH_UNMAP;
+	memset(o->name, 0, sizeof(o->name));
+}
+
+static void
+setup_lvs_opts(struct spdk_bs_opts *bs_opts, struct spdk_lvs_opts *o)
+{
+	assert(o != NULL);
+	lvs_bs_opts_init(bs_opts);
+	bs_opts->cluster_sz = o->cluster_sz;
+	bs_opts->clear_method = (enum bs_clear_method)o->clear_method;
+}
+
+int
+spdk_lvs_init(struct spdk_bs_dev *bs_dev, struct spdk_lvs_opts *o,
+	      spdk_lvs_op_with_handle_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_store *lvs;
+	struct spdk_lvs_with_handle_req *lvs_req;
+	struct spdk_bs_opts opts = {};
+	int rc;
+
+	if (bs_dev == NULL) {
+		SPDK_ERRLOG("Blobstore device does not exist\n");
+		return -ENODEV;
+	}
+
+	if (o == NULL) {
+		SPDK_ERRLOG("spdk_lvs_opts not specified\n");
+		return -EINVAL;
+	}
+
+	setup_lvs_opts(&opts, o);
+
+	if (strnlen(o->name, SPDK_LVS_NAME_MAX) == SPDK_LVS_NAME_MAX) {
+		SPDK_ERRLOG("Name has no null terminator.\n");
+		return -EINVAL;
+	}
+
+	if (strnlen(o->name, SPDK_LVS_NAME_MAX) == 0) {
+		SPDK_ERRLOG("No name specified.\n");
+		return -EINVAL;
+	}
+
+	lvs = calloc(1, sizeof(*lvs));
+	if (!lvs) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol store base pointer\n");
+		return -ENOMEM;
+	}
+
+	spdk_uuid_generate(&lvs->uuid);
+	snprintf(lvs->name, sizeof(lvs->name), "%s", o->name);
+
+	rc = add_lvs_to_list(lvs);
+	if (rc) {
+		SPDK_ERRLOG("lvolstore with name %s already exists\n", lvs->name);
+		lvs_free(lvs);
+		return -EEXIST;
+	}
+
+	lvs_req = calloc(1, sizeof(*lvs_req));
+	if (!lvs_req) {
+		lvs_free(lvs);
+		SPDK_ERRLOG("Cannot alloc memory for lvol store request pointer\n");
+		return -ENOMEM;
+	}
+
+	assert(cb_fn != NULL);
+	lvs_req->cb_fn = cb_fn;
+	lvs_req->cb_arg = cb_arg;
+	lvs_req->lvol_store = lvs;
+	lvs->bs_dev = bs_dev;
+	lvs->destruct = false;
+
+	snprintf(opts.bstype.bstype, sizeof(opts.bstype.bstype), "LVOLSTORE");
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Initializing lvol store\n");
+	spdk_bs_init(bs_dev, &opts, lvs_init_cb, lvs_req);
+
+	return 0;
+}
+
+static void
+lvs_rename_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_req *req = cb_arg;
+
+	if (lvolerrno != 0) {
+		req->lvserrno = lvolerrno;
+	}
+	if (req->lvserrno != 0) {
+		SPDK_ERRLOG("Lvol store rename operation failed\n");
+		/* Lvs renaming failed, so we should 'clear' new_name.
+		 * Otherwise it could cause a failure on the next attepmt to change the name to 'new_name'  */
+		snprintf(req->lvol_store->new_name,
+			 sizeof(req->lvol_store->new_name),
+			 "%s", req->lvol_store->name);
+	} else {
+		/* Update lvs name with new_name */
+		snprintf(req->lvol_store->name,
+			 sizeof(req->lvol_store->name),
+			 "%s", req->lvol_store->new_name);
+	}
+
+	req->cb_fn(req->cb_arg, req->lvserrno);
+	free(req);
+}
+
+static void
+lvs_rename_sync_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvs_req *req = cb_arg;
+	struct spdk_blob *blob = req->lvol_store->super_blob;
+
+	if (lvolerrno < 0) {
+		req->lvserrno = lvolerrno;
+	}
+
+	spdk_blob_close(blob, lvs_rename_cb, req);
+}
+
+static void
+lvs_rename_open_cb(void *cb_arg, struct spdk_blob *blob, int lvolerrno)
+{
+	struct spdk_lvs_req *req = cb_arg;
+	int rc;
+
+	if (lvolerrno < 0) {
+		lvs_rename_cb(cb_arg, lvolerrno);
+		return;
+	}
+
+	rc = spdk_blob_set_xattr(blob, "name", req->lvol_store->new_name,
+				 strlen(req->lvol_store->new_name) + 1);
+	if (rc < 0) {
+		req->lvserrno = rc;
+		lvs_rename_sync_cb(req, rc);
+		return;
+	}
+
+	req->lvol_store->super_blob = blob;
+
+	spdk_blob_sync_md(blob, lvs_rename_sync_cb, req);
+}
+
+void
+spdk_lvs_rename(struct spdk_lvol_store *lvs, const char *new_name,
+		spdk_lvs_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvs_req *req;
+	struct spdk_lvol_store *tmp;
+
+	/* Check if new name is current lvs name.
+	 * If so, return success immediately */
+	if (strncmp(lvs->name, new_name, SPDK_LVS_NAME_MAX) == 0) {
+		cb_fn(cb_arg, 0);
+		return;
+	}
+
+	/* Check if new or new_name is already used in other lvs */
+	pthread_mutex_lock(&g_lvol_stores_mutex);
+	TAILQ_FOREACH(tmp, &g_lvol_stores, link) {
+		if (!strncmp(new_name, tmp->name, SPDK_LVS_NAME_MAX) ||
+		    !strncmp(new_name, tmp->new_name, SPDK_LVS_NAME_MAX)) {
+			pthread_mutex_unlock(&g_lvol_stores_mutex);
+			cb_fn(cb_arg, -EEXIST);
+			return;
+		}
+	}
+	pthread_mutex_unlock(&g_lvol_stores_mutex);
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+	snprintf(lvs->new_name, sizeof(lvs->new_name), "%s", new_name);
+	req->lvol_store = lvs;
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+
+	spdk_bs_open_blob(lvs->blobstore, lvs->super_blob_id, lvs_rename_open_cb, req);
+}
+
+static void
+_lvs_unload_cb(void *cb_arg, int lvserrno)
+{
+	struct spdk_lvs_req *lvs_req = cb_arg;
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Lvol store unloaded\n");
+	assert(lvs_req->cb_fn != NULL);
+	lvs_req->cb_fn(lvs_req->cb_arg, lvserrno);
+	free(lvs_req);
+}
+
+int
+spdk_lvs_unload(struct spdk_lvol_store *lvs, spdk_lvs_op_complete cb_fn,
+		void *cb_arg)
+{
+	struct spdk_lvs_req *lvs_req;
+	struct spdk_lvol *lvol, *tmp;
+
+	if (lvs == NULL) {
+		SPDK_ERRLOG("Lvol store is NULL\n");
+		return -ENODEV;
+	}
+
+	TAILQ_FOREACH_SAFE(lvol, &lvs->lvols, link, tmp) {
+		if (lvol->action_in_progress == true) {
+			SPDK_ERRLOG("Cannot unload lvol store - operations on lvols pending\n");
+			cb_fn(cb_arg, -EBUSY);
+			return -EBUSY;
+		} else if (lvol->ref_count != 0) {
+			SPDK_ERRLOG("Lvols still open on lvol store\n");
+			cb_fn(cb_arg, -EBUSY);
+			return -EBUSY;
+		}
+	}
+
+	TAILQ_FOREACH_SAFE(lvol, &lvs->lvols, link, tmp) {
+		TAILQ_REMOVE(&lvs->lvols, lvol, link);
+		lvol_free(lvol);
+	}
+
+	lvs_req = calloc(1, sizeof(*lvs_req));
+	if (!lvs_req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol store request pointer\n");
+		return -ENOMEM;
+	}
+
+	lvs_req->cb_fn = cb_fn;
+	lvs_req->cb_arg = cb_arg;
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Unloading lvol store\n");
+	spdk_bs_unload(lvs->blobstore, _lvs_unload_cb, lvs_req);
+	lvs_free(lvs);
+
+	return 0;
+}
+
+static void
+_lvs_destroy_cb(void *cb_arg, int lvserrno)
+{
+	struct spdk_lvs_destroy_req *lvs_req = cb_arg;
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Lvol store destroyed\n");
+	assert(lvs_req->cb_fn != NULL);
+	lvs_req->cb_fn(lvs_req->cb_arg, lvserrno);
+	free(lvs_req);
+}
+
+static void
+_lvs_destroy_super_cb(void *cb_arg, int bserrno)
+{
+	struct spdk_lvs_destroy_req *lvs_req = cb_arg;
+	struct spdk_lvol_store *lvs = lvs_req->lvs;
+
+	assert(lvs != NULL);
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Destroying lvol store\n");
+	spdk_bs_destroy(lvs->blobstore, _lvs_destroy_cb, lvs_req);
+	lvs_free(lvs);
+}
+
+int
+spdk_lvs_destroy(struct spdk_lvol_store *lvs, spdk_lvs_op_complete cb_fn,
+		 void *cb_arg)
+{
+	struct spdk_lvs_destroy_req *lvs_req;
+	struct spdk_lvol *iter_lvol, *tmp;
+
+	if (lvs == NULL) {
+		SPDK_ERRLOG("Lvol store is NULL\n");
+		return -ENODEV;
+	}
+
+	TAILQ_FOREACH_SAFE(iter_lvol, &lvs->lvols, link, tmp) {
+		if (iter_lvol->action_in_progress == true) {
+			SPDK_ERRLOG("Cannot destroy lvol store - operations on lvols pending\n");
+			cb_fn(cb_arg, -EBUSY);
+			return -EBUSY;
+		} else if (iter_lvol->ref_count != 0) {
+			SPDK_ERRLOG("Lvols still open on lvol store\n");
+			cb_fn(cb_arg, -EBUSY);
+			return -EBUSY;
+		}
+	}
+
+	TAILQ_FOREACH_SAFE(iter_lvol, &lvs->lvols, link, tmp) {
+		free(iter_lvol);
+	}
+
+	lvs_req = calloc(1, sizeof(*lvs_req));
+	if (!lvs_req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol store request pointer\n");
+		return -ENOMEM;
+	}
+
+	lvs_req->cb_fn = cb_fn;
+	lvs_req->cb_arg = cb_arg;
+	lvs_req->lvs = lvs;
+
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Deleting super blob\n");
+	spdk_bs_delete_blob(lvs->blobstore, lvs->super_blob_id, _lvs_destroy_super_cb, lvs_req);
+
+	return 0;
+}
+
+static void
+lvol_close_blob_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvol_req *req = cb_arg;
+	struct spdk_lvol *lvol = req->lvol;
+
+	if (lvolerrno < 0) {
+		SPDK_ERRLOG("Could not close blob on lvol\n");
+		lvol_free(lvol);
+		goto end;
+	}
+
+	lvol->ref_count--;
+	lvol->action_in_progress = false;
+	SPDK_INFOLOG(SPDK_LOG_LVOL, "Lvol %s closed\n", lvol->unique_id);
+
+end:
+	req->cb_fn(req->cb_arg, lvolerrno);
+	free(req);
+}
+
+bool
+spdk_lvol_deletable(struct spdk_lvol *lvol)
+{
+	size_t count = 0;
+
+	spdk_blob_get_clones(lvol->lvol_store->blobstore, lvol->blob_id, NULL, &count);
+	return (count == 0);
+}
+
+static void
+lvol_delete_blob_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvol_req *req = cb_arg;
+	struct spdk_lvol *lvol = req->lvol;
+
+	if (lvolerrno < 0) {
+		SPDK_ERRLOG("Could not remove blob on lvol gracefully - forced removal\n");
+	} else {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Lvol %s deleted\n", lvol->unique_id);
+	}
+
+	TAILQ_REMOVE(&lvol->lvol_store->lvols, lvol, link);
+	lvol_free(lvol);
+	req->cb_fn(req->cb_arg, lvolerrno);
+	free(req);
+}
+
+static void
+lvol_create_open_cb(void *cb_arg, struct spdk_blob *blob, int lvolerrno)
+{
+	struct spdk_lvol_with_handle_req *req = cb_arg;
+	struct spdk_lvol *lvol = req->lvol;
+
+	TAILQ_REMOVE(&req->lvol->lvol_store->pending_lvols, req->lvol, link);
+
+	if (lvolerrno < 0) {
+		free(lvol);
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		free(req);
+		return;
+	}
+
+	lvol->blob = blob;
+	lvol->blob_id = spdk_blob_get_id(blob);
+
+	TAILQ_INSERT_TAIL(&lvol->lvol_store->lvols, lvol, link);
+
+	snprintf(lvol->unique_id, sizeof(lvol->unique_id), "%s", lvol->uuid_str);
+	lvol->ref_count++;
+
+	assert(req->cb_fn != NULL);
+	req->cb_fn(req->cb_arg, req->lvol, lvolerrno);
+	free(req);
+}
+
+static void
+lvol_create_cb(void *cb_arg, spdk_blob_id blobid, int lvolerrno)
+{
+	struct spdk_lvol_with_handle_req *req = cb_arg;
+	struct spdk_blob_store *bs;
+	struct spdk_blob_open_opts opts;
+
+	if (lvolerrno < 0) {
+		TAILQ_REMOVE(&req->lvol->lvol_store->pending_lvols, req->lvol, link);
+		free(req->lvol);
+		assert(req->cb_fn != NULL);
+		req->cb_fn(req->cb_arg, NULL, lvolerrno);
+		free(req);
+		return;
+	}
+
+	spdk_blob_open_opts_init(&opts);
+	opts.clear_method = req->lvol->clear_method;
+	bs = req->lvol->lvol_store->blobstore;
+
+	spdk_bs_open_blob_ext(bs, blobid, &opts, lvol_create_open_cb, req);
+}
+
+static void
+lvol_get_xattr_value(void *xattr_ctx, const char *name,
+		     const void **value, size_t *value_len)
+{
+	struct spdk_lvol *lvol = xattr_ctx;
+
+	if (!strcmp(LVOL_NAME, name)) {
+		*value = lvol->name;
+		*value_len = SPDK_LVOL_NAME_MAX;
+	} else if (!strcmp("uuid", name)) {
+		*value = lvol->uuid_str;
+		*value_len = sizeof(lvol->uuid_str);
+	}
+}
+
+static int
+lvs_verify_lvol_name(struct spdk_lvol_store *lvs, const char *name)
+{
+	struct spdk_lvol *tmp;
+
+	if (name == NULL || strnlen(name, SPDK_LVOL_NAME_MAX) == 0) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "lvol name not provided.\n");
+		return -EINVAL;
+	}
+
+	if (strnlen(name, SPDK_LVOL_NAME_MAX) == SPDK_LVOL_NAME_MAX) {
+		SPDK_ERRLOG("Name has no null terminator.\n");
+		return -EINVAL;
+	}
+
+	TAILQ_FOREACH(tmp, &lvs->lvols, link) {
+		if (!strncmp(name, tmp->name, SPDK_LVOL_NAME_MAX)) {
+			SPDK_ERRLOG("lvol with name %s already exists\n", name);
+			return -EEXIST;
+		}
+	}
+
+	TAILQ_FOREACH(tmp, &lvs->pending_lvols, link) {
+		if (!strncmp(name, tmp->name, SPDK_LVOL_NAME_MAX)) {
+			SPDK_ERRLOG("lvol with name %s is being already created\n", name);
+			return -EEXIST;
+		}
+	}
+
+	return 0;
+}
+
+int
+spdk_lvol_create(struct spdk_lvol_store *lvs, const char *name, uint64_t sz,
+		 bool thin_provision, enum lvol_clear_method clear_method, spdk_lvol_op_with_handle_complete cb_fn,
+		 void *cb_arg)
+{
+	struct spdk_lvol_with_handle_req *req;
+	struct spdk_blob_store *bs;
+	struct spdk_lvol *lvol;
+	struct spdk_blob_opts opts;
+	uint64_t num_clusters;
+	char *xattr_names[] = {LVOL_NAME, "uuid"};
+	int rc;
+
+	if (lvs == NULL) {
+		SPDK_ERRLOG("lvol store does not exist\n");
+		return -EINVAL;
+	}
+
+	rc = lvs_verify_lvol_name(lvs, name);
+	if (rc < 0) {
+		return rc;
+	}
+
+	bs = lvs->blobstore;
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		return -ENOMEM;
+	}
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+
+	lvol = calloc(1, sizeof(*lvol));
+	if (!lvol) {
+		free(req);
+		SPDK_ERRLOG("Cannot alloc memory for lvol base pointer\n");
+		return -ENOMEM;
+	}
+	lvol->lvol_store = lvs;
+	num_clusters = spdk_divide_round_up(sz, spdk_bs_get_cluster_size(bs));
+	lvol->thin_provision = thin_provision;
+	lvol->clear_method = (enum blob_clear_method)clear_method;
+	snprintf(lvol->name, sizeof(lvol->name), "%s", name);
+	TAILQ_INSERT_TAIL(&lvol->lvol_store->pending_lvols, lvol, link);
+	spdk_uuid_generate(&lvol->uuid);
+	spdk_uuid_fmt_lower(lvol->uuid_str, sizeof(lvol->uuid_str), &lvol->uuid);
+	req->lvol = lvol;
+
+	spdk_blob_opts_init(&opts);
+	opts.thin_provision = thin_provision;
+	opts.num_clusters = num_clusters;
+	opts.clear_method = lvol->clear_method;
+	opts.xattrs.count = SPDK_COUNTOF(xattr_names);
+	opts.xattrs.names = xattr_names;
+	opts.xattrs.ctx = lvol;
+	opts.xattrs.get_value = lvol_get_xattr_value;
+
+	spdk_bs_create_blob_ext(lvs->blobstore, &opts, lvol_create_cb, req);
+
+	return 0;
+}
+
+void
+spdk_lvol_create_snapshot(struct spdk_lvol *origlvol, const char *snapshot_name,
+			  spdk_lvol_op_with_handle_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_store *lvs;
+	struct spdk_lvol *newlvol;
+	struct spdk_blob *origblob;
+	struct spdk_lvol_with_handle_req *req;
+	struct spdk_blob_xattr_opts snapshot_xattrs;
+	char *xattr_names[] = {LVOL_NAME, "uuid"};
+	int rc;
+
+	if (origlvol == NULL) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Lvol not provided.\n");
+		cb_fn(cb_arg, NULL, -EINVAL);
+		return;
+	}
+
+	origblob = origlvol->blob;
+	lvs = origlvol->lvol_store;
+	if (lvs == NULL) {
+		SPDK_ERRLOG("lvol store does not exist\n");
+		cb_fn(cb_arg, NULL, -EINVAL);
+		return;
+	}
+
+	rc = lvs_verify_lvol_name(lvs, snapshot_name);
+	if (rc < 0) {
+		cb_fn(cb_arg, NULL, rc);
+		return;
+	}
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, NULL, -ENOMEM);
+		return;
+	}
+
+	newlvol = calloc(1, sizeof(*newlvol));
+	if (!newlvol) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol base pointer\n");
+		free(req);
+		cb_fn(cb_arg, NULL, -ENOMEM);
+		return;
+	}
+
+	newlvol->lvol_store = origlvol->lvol_store;
+	snprintf(newlvol->name, sizeof(newlvol->name), "%s", snapshot_name);
+	TAILQ_INSERT_TAIL(&newlvol->lvol_store->pending_lvols, newlvol, link);
+	spdk_uuid_generate(&newlvol->uuid);
+	spdk_uuid_fmt_lower(newlvol->uuid_str, sizeof(newlvol->uuid_str), &newlvol->uuid);
+	snapshot_xattrs.count = SPDK_COUNTOF(xattr_names);
+	snapshot_xattrs.ctx = newlvol;
+	snapshot_xattrs.names = xattr_names;
+	snapshot_xattrs.get_value = lvol_get_xattr_value;
+	req->lvol = newlvol;
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+
+	spdk_bs_create_snapshot(lvs->blobstore, spdk_blob_get_id(origblob), &snapshot_xattrs,
+				lvol_create_cb, req);
+}
+
+void
+spdk_lvol_create_clone(struct spdk_lvol *origlvol, const char *clone_name,
+		       spdk_lvol_op_with_handle_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol *newlvol;
+	struct spdk_lvol_with_handle_req *req;
+	struct spdk_lvol_store *lvs;
+	struct spdk_blob *origblob;
+	struct spdk_blob_xattr_opts clone_xattrs;
+	char *xattr_names[] = {LVOL_NAME, "uuid"};
+	int rc;
+
+	if (origlvol == NULL) {
+		SPDK_INFOLOG(SPDK_LOG_LVOL, "Lvol not provided.\n");
+		cb_fn(cb_arg, NULL, -EINVAL);
+		return;
+	}
+
+	origblob = origlvol->blob;
+	lvs = origlvol->lvol_store;
+	if (lvs == NULL) {
+		SPDK_ERRLOG("lvol store does not exist\n");
+		cb_fn(cb_arg, NULL, -EINVAL);
+		return;
+	}
+
+	rc = lvs_verify_lvol_name(lvs, clone_name);
+	if (rc < 0) {
+		cb_fn(cb_arg, NULL, rc);
+		return;
+	}
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, NULL, -ENOMEM);
+		return;
+	}
+
+	newlvol = calloc(1, sizeof(*newlvol));
+	if (!newlvol) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol base pointer\n");
+		free(req);
+		cb_fn(cb_arg, NULL, -ENOMEM);
+		return;
+	}
+
+	newlvol->lvol_store = lvs;
+	snprintf(newlvol->name, sizeof(newlvol->name), "%s", clone_name);
+	TAILQ_INSERT_TAIL(&newlvol->lvol_store->pending_lvols, newlvol, link);
+	spdk_uuid_generate(&newlvol->uuid);
+	spdk_uuid_fmt_lower(newlvol->uuid_str, sizeof(newlvol->uuid_str), &newlvol->uuid);
+	clone_xattrs.count = SPDK_COUNTOF(xattr_names);
+	clone_xattrs.ctx = newlvol;
+	clone_xattrs.names = xattr_names;
+	clone_xattrs.get_value = lvol_get_xattr_value;
+	req->lvol = newlvol;
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+
+	spdk_bs_create_clone(lvs->blobstore, spdk_blob_get_id(origblob), &clone_xattrs,
+			     lvol_create_cb,
+			     req);
+}
+
+static void
+lvol_resize_done(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvol_req *req = cb_arg;
+
+	req->cb_fn(req->cb_arg,  lvolerrno);
+	free(req);
+}
+
+static void
+lvol_blob_resize_cb(void *cb_arg, int bserrno)
+{
+	struct spdk_lvol_req *req = cb_arg;
+	struct spdk_lvol *lvol = req->lvol;
+
+	if (bserrno != 0) {
+		req->cb_fn(req->cb_arg, bserrno);
+		free(req);
+		return;
+	}
+
+	spdk_blob_sync_md(lvol->blob, lvol_resize_done, req);
+}
+
+void
+spdk_lvol_resize(struct spdk_lvol *lvol, uint64_t sz,
+		 spdk_lvol_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_blob *blob = lvol->blob;
+	struct spdk_lvol_store *lvs = lvol->lvol_store;
+	struct spdk_lvol_req *req;
+	uint64_t new_clusters = spdk_divide_round_up(sz, spdk_bs_get_cluster_size(lvs->blobstore));
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->lvol = lvol;
+
+	spdk_blob_resize(blob, new_clusters, lvol_blob_resize_cb, req);
+}
+
+static void
+lvol_set_read_only_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvol_req *req = cb_arg;
+
+	req->cb_fn(req->cb_arg, lvolerrno);
+	free(req);
+}
+
+void
+spdk_lvol_set_read_only(struct spdk_lvol *lvol, spdk_lvol_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_req *req;
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+
+	spdk_blob_set_read_only(lvol->blob);
+	spdk_blob_sync_md(lvol->blob, lvol_set_read_only_cb, req);
+}
+
+static void
+lvol_rename_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvol_req *req = cb_arg;
+
+	if (lvolerrno != 0) {
+		SPDK_ERRLOG("Lvol rename operation failed\n");
+	} else {
+		snprintf(req->lvol->name, sizeof(req->lvol->name), "%s", req->name);
+	}
+
+	req->cb_fn(req->cb_arg, lvolerrno);
+	free(req);
+}
+
+void
+spdk_lvol_rename(struct spdk_lvol *lvol, const char *new_name,
+		 spdk_lvol_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol *tmp;
+	struct spdk_blob *blob = lvol->blob;
+	struct spdk_lvol_req *req;
+	int rc;
+
+	/* Check if new name is current lvol name.
+	 * If so, return success immediately */
+	if (strncmp(lvol->name, new_name, SPDK_LVOL_NAME_MAX) == 0) {
+		cb_fn(cb_arg, 0);
+		return;
+	}
+
+	/* Check if lvol with 'new_name' already exists in lvolstore */
+	TAILQ_FOREACH(tmp, &lvol->lvol_store->lvols, link) {
+		if (strncmp(tmp->name, new_name, SPDK_LVOL_NAME_MAX) == 0) {
+			SPDK_ERRLOG("Lvol %s already exists in lvol store %s\n", new_name, lvol->lvol_store->name);
+			cb_fn(cb_arg, -EEXIST);
+			return;
+		}
+	}
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->lvol = lvol;
+	snprintf(req->name, sizeof(req->name), "%s", new_name);
+
+	rc = spdk_blob_set_xattr(blob, "name", new_name, strlen(new_name) + 1);
+	if (rc < 0) {
+		free(req);
+		cb_fn(cb_arg, rc);
+		return;
+	}
+
+	spdk_blob_sync_md(blob, lvol_rename_cb, req);
+}
+
+void
+spdk_lvol_destroy(struct spdk_lvol *lvol, spdk_lvol_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_req *req;
+	struct spdk_blob_store *bs;
+
+	assert(cb_fn != NULL);
+
+	if (lvol == NULL) {
+		SPDK_ERRLOG("lvol does not exist\n");
+		cb_fn(cb_arg, -ENODEV);
+		return;
+	}
+
+	if (lvol->ref_count != 0) {
+		SPDK_ERRLOG("Cannot destroy lvol %s because it is still open\n", lvol->unique_id);
+		cb_fn(cb_arg, -EBUSY);
+		return;
+	}
+
+	lvol->action_in_progress = true;
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->lvol = lvol;
+	bs = lvol->lvol_store->blobstore;
+
+	spdk_bs_delete_blob(bs, lvol->blob_id, lvol_delete_blob_cb, req);
+}
+
+void
+spdk_lvol_close(struct spdk_lvol *lvol, spdk_lvol_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_req *req;
+
+	assert(cb_fn != NULL);
+
+	if (lvol == NULL) {
+		SPDK_ERRLOG("lvol does not exist\n");
+		cb_fn(cb_arg, -ENODEV);
+		return;
+	}
+
+	if (lvol->ref_count > 1) {
+		lvol->ref_count--;
+		cb_fn(cb_arg, 0);
+		return;
+	} else if (lvol->ref_count == 0) {
+		cb_fn(cb_arg, -EINVAL);
+		return;
+	}
+
+	lvol->action_in_progress = true;
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->lvol = lvol;
+
+	spdk_blob_close(lvol->blob, lvol_close_blob_cb, req);
+}
+
+struct spdk_io_channel *
+spdk_lvol_get_io_channel(struct spdk_lvol *lvol)
+{
+	return spdk_bs_alloc_io_channel(lvol->lvol_store->blobstore);
+}
+
+static void
+lvol_inflate_cb(void *cb_arg, int lvolerrno)
+{
+	struct spdk_lvol_req *req = cb_arg;
+
+	spdk_bs_free_io_channel(req->channel);
+
+	if (lvolerrno < 0) {
+		SPDK_ERRLOG("Could not inflate lvol\n");
+	}
+
+	req->cb_fn(req->cb_arg, lvolerrno);
+	free(req);
+}
+
+void
+spdk_lvol_inflate(struct spdk_lvol *lvol, spdk_lvol_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_req *req;
+	spdk_blob_id blob_id;
+
+	assert(cb_fn != NULL);
+
+	if (lvol == NULL) {
+		SPDK_ERRLOG("Lvol does not exist\n");
+		cb_fn(cb_arg, -ENODEV);
+		return;
+	}
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->channel = spdk_bs_alloc_io_channel(lvol->lvol_store->blobstore);
+	if (req->channel == NULL) {
+		SPDK_ERRLOG("Cannot alloc io channel for lvol inflate request\n");
+		free(req);
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+
+	blob_id = spdk_blob_get_id(lvol->blob);
+	spdk_bs_inflate_blob(lvol->lvol_store->blobstore, req->channel, blob_id, lvol_inflate_cb,
+			     req);
+}
+
+void
+spdk_lvol_decouple_parent(struct spdk_lvol *lvol, spdk_lvol_op_complete cb_fn, void *cb_arg)
+{
+	struct spdk_lvol_req *req;
+	spdk_blob_id blob_id;
+
+	assert(cb_fn != NULL);
+
+	if (lvol == NULL) {
+		SPDK_ERRLOG("Lvol does not exist\n");
+		cb_fn(cb_arg, -ENODEV);
+		return;
+	}
+
+	req = calloc(1, sizeof(*req));
+	if (!req) {
+		SPDK_ERRLOG("Cannot alloc memory for lvol request pointer\n");
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+
+	req->cb_fn = cb_fn;
+	req->cb_arg = cb_arg;
+	req->channel = spdk_bs_alloc_io_channel(lvol->lvol_store->blobstore);
+	if (req->channel == NULL) {
+		SPDK_ERRLOG("Cannot alloc io channel for lvol inflate request\n");
+		free(req);
+		cb_fn(cb_arg, -ENOMEM);
+		return;
+	}
+
+	blob_id = spdk_blob_get_id(lvol->blob);
+	spdk_bs_blob_decouple_parent(lvol->lvol_store->blobstore, req->channel, blob_id,
+				     lvol_inflate_cb, req);
+}
diff --git a/src/spdk/lib/lvol/spdk_lvol.map b/src/spdk/lib/lvol/spdk_lvol.map
new file mode 100644
index 000000000..6ddeb3be6
--- /dev/null
+++ b/src/spdk/lib/lvol/spdk_lvol.map
@@ -0,0 +1,28 @@
+{
+	global:
+
+	# public functions
+	spdk_lvs_opts_init;
+	spdk_lvs_init;
+	spdk_lvs_rename;
+	spdk_lvs_unload;
+	spdk_lvs_destroy;
+	spdk_lvol_create;
+	spdk_lvol_create_snapshot;
+	spdk_lvol_create_clone;
+	spdk_lvol_rename;
+	spdk_lvol_deletable;
+	spdk_lvol_destroy;
+	spdk_lvol_close;
+	spdk_lvol_get_io_channel;
+	spdk_lvs_load;
+	spdk_lvol_open;
+	spdk_lvol_inflate;
+	spdk_lvol_decouple_parent;
+
+	# internal functions
+	spdk_lvol_resize;
+	spdk_lvol_set_read_only;
+
+	local: *;
+};