numam-spdk/lib/lvol/lvol.c

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/*-
* 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
_spdk_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
_spdk_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
_spdk_lvol_free(struct spdk_lvol *lvol)
{
free(lvol);
}
static void
_spdk_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, _spdk_lvol_open_cb, req);
}
static void
_spdk_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
_spdk_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;
const enum blob_clear_method *clear_method;
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, _spdk_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;
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");
_spdk_lvol_free(lvol);
req->lvserrno = -EINVAL;
goto invalid;
}
rc = spdk_blob_get_xattr_value(blob, "clear_method", (const void **)&clear_method, &value_len);
if (rc != 0) {
lvol->clear_method = BLOB_CLEAR_WITH_DEFAULT;
} else {
lvol->clear_method = *clear_method;
}
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, _spdk_load_next_lvol, req);
return;
invalid:
TAILQ_FOREACH_SAFE(lvol, &lvs->lvols, link, tmp) {
TAILQ_REMOVE(&lvs->lvols, lvol, link);
free(lvol);
}
_spdk_lvs_free(lvs);
spdk_bs_unload(bs, _spdk_bs_unload_with_error_cb, req);
}
static void
_spdk_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");
_spdk_lvs_free(lvs);
req->lvserrno = -ENODEV;
spdk_bs_unload(bs, _spdk_bs_unload_with_error_cb, req);
return;
}
/* Start loading lvols */
spdk_bs_iter_first(lvs->blobstore, _spdk_load_next_lvol, req);
}
static void
_spdk_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;
_spdk_lvs_free(lvs);
spdk_bs_unload(bs, _spdk_bs_unload_with_error_cb, req);
}
static void
_spdk_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");
_spdk_lvs_free(lvs);
req->lvserrno = -ENODEV;
spdk_bs_unload(bs, _spdk_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, _spdk_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, _spdk_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, _spdk_close_super_blob_with_error_cb, req);
return;
}
snprintf(lvs->name, sizeof(lvs->name), "%s", attr);
rc = _spdk_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, _spdk_close_super_blob_with_error_cb, req);
return;
}
lvs->super_blob_id = spdk_blob_get_id(blob);
spdk_blob_close(blob, _spdk_close_super_cb, req);
}
static void
_spdk_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");
_spdk_lvs_free(lvs);
req->lvserrno = -ENODEV;
spdk_bs_unload(bs, _spdk_bs_unload_with_error_cb, req);
return;
}
spdk_bs_open_blob(bs, blobid, _spdk_lvs_read_uuid, req);
}
static void
_spdk_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, _spdk_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, _spdk_lvs_open_super, req);
}
static void
spdk_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;
spdk_lvs_bs_opts_init(&opts);
snprintf(opts.bstype.bstype, sizeof(opts.bstype.bstype), "LVOLSTORE");
spdk_bs_load(bs_dev, &opts, _spdk_lvs_load_cb, req);
}
static void
_spdk_remove_bs_on_error_cb(void *cb_arg, int bserrno)
{
}
static void
_spdk_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, _spdk_remove_bs_on_error_cb, NULL);
_spdk_lvs_free(lvs);
free(req);
return;
}
req->cb_fn(req->cb_arg, lvs, lvolerrno);
free(req);
}
static void
_spdk_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, _spdk_remove_bs_on_error_cb, NULL);
_spdk_lvs_free(lvs);
free(req);
return;
}
spdk_blob_close(blob, _spdk_super_create_close_cb, req);
}
static void
_spdk_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, _spdk_remove_bs_on_error_cb, NULL);
_spdk_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, _spdk_super_blob_set_cb, req);
}
static void
_spdk_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, _spdk_remove_bs_on_error_cb, NULL);
_spdk_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, _spdk_super_blob_init_cb, req);
}
static void
_spdk_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, _spdk_remove_bs_on_error_cb, NULL);
_spdk_lvs_free(lvs);
free(req);
return;
}
bs = req->lvol_store->blobstore;
spdk_bs_open_blob(bs, blobid, _spdk_super_blob_create_open_cb, req);
}
static void
_spdk_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");
_spdk_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, _spdk_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
_spdk_setup_lvs_opts(struct spdk_bs_opts *bs_opts, struct spdk_lvs_opts *o)
{
assert(o != NULL);
spdk_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;
}
_spdk_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 = _spdk_add_lvs_to_list(lvs);
if (rc) {
SPDK_ERRLOG("lvolstore with name %s already exists\n", lvs->name);
_spdk_lvs_free(lvs);
return -EEXIST;
}
lvs_req = calloc(1, sizeof(*lvs_req));
if (!lvs_req) {
_spdk_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, _spdk_lvs_init_cb, lvs_req);
return 0;
}
static void
_spdk_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
_spdk_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, _spdk_lvs_rename_cb, req);
}
static void
_spdk_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) {
_spdk_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;
_spdk_lvs_rename_sync_cb(req, rc);
return;
}
req->lvol_store->super_blob = blob;
spdk_blob_sync_md(blob, _spdk_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, _spdk_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);
_spdk_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);
_spdk_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);
_spdk_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
_spdk_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");
_spdk_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;
spdk_blob_get_clones(lvol->lvol_store->blobstore, lvol->blob_id, NULL, &count);
return (count == 0);
}
static void
_spdk_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);
_spdk_lvol_free(lvol);
req->cb_fn(req->cb_arg, lvolerrno);
free(req);
}
static void
_spdk_lvol_create_open_cb(void *cb_arg, struct spdk_blob *blob, int lvolerrno)
{
struct spdk_lvol_with_handle_req *req = cb_arg;
spdk_blob_id blob_id = spdk_blob_get_id(blob);
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 = blob_id;
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
_spdk_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, _spdk_lvol_create_open_cb, req);
}
static void
spdk_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);
} else if (!strcmp("clear_method", name)) {
*value = &lvol->clear_method;
*value_len = sizeof(int);
}
}
static int
_spdk_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", "clear_method"};
int rc;
if (lvs == NULL) {
SPDK_ERRLOG("lvol store does not exist\n");
return -EINVAL;
}
rc = _spdk_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.xattrs.count = SPDK_COUNTOF(xattr_names);
opts.xattrs.names = xattr_names;
opts.xattrs.ctx = lvol;
opts.xattrs.get_value = spdk_lvol_get_xattr_value;
spdk_bs_create_blob_ext(lvs->blobstore, &opts, _spdk_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 = _spdk_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 = spdk_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,
_spdk_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 = _spdk_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 = spdk_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,
_spdk_lvol_create_cb,
req);
}
static void
_spdk_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
_spdk_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, _spdk_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, _spdk_lvol_blob_resize_cb, req);
}
static void
_spdk_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, _spdk_lvol_set_read_only_cb, req);
}
static void
_spdk_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, _spdk_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, _spdk_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, _spdk_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
_spdk_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, _spdk_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,
_spdk_lvol_inflate_cb, req);
}