* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-#include <stdbool.h>
-#include <assert.h>
-#include <errno.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
+#include "spdk/stdinc.h"
#include "spdk/blob.h"
+#include "spdk/crc32.h"
#include "spdk/env.h"
#include "spdk/queue.h"
-#include "spdk/io_channel.h"
+#include "spdk/thread.h"
#include "spdk/bit_array.h"
+#include "spdk/likely.h"
+#include "spdk_internal/assert.h"
#include "spdk_internal/log.h"
#include "blobstore.h"
-#include "request.h"
+
+#define BLOB_CRC32C_INITIAL 0xffffffffUL
+
+static int spdk_bs_register_md_thread(struct spdk_blob_store *bs);
+static int spdk_bs_unregister_md_thread(struct spdk_blob_store *bs);
+static void _spdk_blob_close_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno);
+static void _spdk_blob_insert_cluster_on_md_thread(struct spdk_blob *blob, uint32_t cluster_num,
+ uint64_t cluster, spdk_blob_op_complete cb_fn, void *cb_arg);
+
+static int _spdk_blob_set_xattr(struct spdk_blob *blob, const char *name, const void *value,
+ uint16_t value_len, bool internal);
+static int _spdk_blob_get_xattr_value(struct spdk_blob *blob, const char *name,
+ const void **value, size_t *value_len, bool internal);
+static int _spdk_blob_remove_xattr(struct spdk_blob *blob, const char *name, bool internal);
+
+static void
+_spdk_blob_verify_md_op(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+ assert(spdk_get_thread() == blob->bs->md_thread);
+ assert(blob->state != SPDK_BLOB_STATE_LOADING);
+}
static inline size_t
divide_round_up(size_t num, size_t divisor)
assert(spdk_bit_array_get(bs->used_clusters, cluster_num) == false);
assert(bs->num_free_clusters > 0);
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Claiming cluster %u\n", cluster_num);
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Claiming cluster %u\n", cluster_num);
spdk_bit_array_set(bs->used_clusters, cluster_num);
bs->num_free_clusters--;
}
+static int
+_spdk_blob_insert_cluster(struct spdk_blob *blob, uint32_t cluster_num, uint64_t cluster)
+{
+ uint64_t *cluster_lba = &blob->active.clusters[cluster_num];
+
+ _spdk_blob_verify_md_op(blob);
+
+ if (*cluster_lba != 0) {
+ return -EEXIST;
+ }
+
+ *cluster_lba = _spdk_bs_cluster_to_lba(blob->bs, cluster);
+ return 0;
+}
+
+static int
+_spdk_bs_allocate_cluster(struct spdk_blob *blob, uint32_t cluster_num,
+ uint64_t *lowest_free_cluster, bool update_map)
+{
+ pthread_mutex_lock(&blob->bs->used_clusters_mutex);
+ *lowest_free_cluster = spdk_bit_array_find_first_clear(blob->bs->used_clusters,
+ *lowest_free_cluster);
+ if (*lowest_free_cluster == UINT32_MAX) {
+ /* No more free clusters. Cannot satisfy the request */
+ pthread_mutex_unlock(&blob->bs->used_clusters_mutex);
+ return -ENOSPC;
+ }
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Claiming cluster %lu for blob %lu\n", *lowest_free_cluster, blob->id);
+ _spdk_bs_claim_cluster(blob->bs, *lowest_free_cluster);
+ pthread_mutex_unlock(&blob->bs->used_clusters_mutex);
+
+ if (update_map) {
+ _spdk_blob_insert_cluster(blob, cluster_num, *lowest_free_cluster);
+ }
+
+ return 0;
+}
+
static void
_spdk_bs_release_cluster(struct spdk_blob_store *bs, uint32_t cluster_num)
{
assert(spdk_bit_array_get(bs->used_clusters, cluster_num) == true);
assert(bs->num_free_clusters < bs->total_clusters);
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Releasing cluster %u\n", cluster_num);
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Releasing cluster %u\n", cluster_num);
+ pthread_mutex_lock(&bs->used_clusters_mutex);
spdk_bit_array_clear(bs->used_clusters, cluster_num);
bs->num_free_clusters++;
+ pthread_mutex_unlock(&bs->used_clusters_mutex);
+}
+
+static void
+_spdk_blob_xattrs_init(struct spdk_blob_xattr_opts *xattrs)
+{
+ xattrs->count = 0;
+ xattrs->names = NULL;
+ xattrs->ctx = NULL;
+ xattrs->get_value = NULL;
+}
+
+void
+spdk_blob_opts_init(struct spdk_blob_opts *opts)
+{
+ opts->num_clusters = 0;
+ opts->thin_provision = false;
+ _spdk_blob_xattrs_init(&opts->xattrs);
}
static struct spdk_blob *
blob->id = id;
blob->bs = bs;
+ blob->parent_id = SPDK_BLOBID_INVALID;
+
blob->state = SPDK_BLOB_STATE_DIRTY;
blob->active.num_pages = 1;
blob->active.pages = calloc(1, sizeof(*blob->active.pages));
blob->active.pages[0] = _spdk_bs_blobid_to_page(id);
TAILQ_INIT(&blob->xattrs);
+ TAILQ_INIT(&blob->xattrs_internal);
return blob;
}
static void
-_spdk_blob_free(struct spdk_blob *blob)
+_spdk_xattrs_free(struct spdk_xattr_tailq *xattrs)
{
- struct spdk_xattr *xattr, *xattr_tmp;
+ struct spdk_xattr *xattr, *xattr_tmp;
+
+ TAILQ_FOREACH_SAFE(xattr, xattrs, link, xattr_tmp) {
+ TAILQ_REMOVE(xattrs, xattr, link);
+ free(xattr->name);
+ free(xattr->value);
+ free(xattr);
+ }
+}
+static void
+_spdk_blob_free(struct spdk_blob *blob)
+{
assert(blob != NULL);
free(blob->active.clusters);
free(blob->active.pages);
free(blob->clean.pages);
- TAILQ_FOREACH_SAFE(xattr, &blob->xattrs, link, xattr_tmp) {
- TAILQ_REMOVE(&blob->xattrs, xattr, link);
- free(xattr->name);
- free(xattr->value);
- free(xattr);
+ _spdk_xattrs_free(&blob->xattrs);
+ _spdk_xattrs_free(&blob->xattrs_internal);
+
+ if (blob->back_bs_dev) {
+ blob->back_bs_dev->destroy(blob->back_bs_dev);
}
free(blob);
}
+struct freeze_io_ctx {
+ struct spdk_bs_cpl cpl;
+ struct spdk_blob *blob;
+};
+
+static void
+_spdk_blob_io_sync(struct spdk_io_channel_iter *i)
+{
+ spdk_for_each_channel_continue(i, 0);
+}
+
+static void
+_spdk_blob_execute_queued_io(struct spdk_io_channel_iter *i)
+{
+ struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
+ struct spdk_bs_channel *ch = spdk_io_channel_get_ctx(_ch);
+ struct freeze_io_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
+ struct spdk_bs_request_set *set;
+ struct spdk_bs_user_op_args *args;
+ spdk_bs_user_op_t *op, *tmp;
+
+ TAILQ_FOREACH_SAFE(op, &ch->queued_io, link, tmp) {
+ set = (struct spdk_bs_request_set *)op;
+ args = &set->u.user_op;
+
+ if (args->blob == ctx->blob) {
+ TAILQ_REMOVE(&ch->queued_io, op, link);
+ spdk_bs_user_op_execute(op);
+ }
+ }
+
+ spdk_for_each_channel_continue(i, 0);
+}
+
+static void
+_spdk_blob_io_cpl(struct spdk_io_channel_iter *i, int status)
+{
+ struct freeze_io_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
+
+ ctx->cpl.u.blob_basic.cb_fn(ctx->cpl.u.blob_basic.cb_arg, 0);
+
+ free(ctx);
+}
+
+static void
+_spdk_blob_freeze_io(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ struct freeze_io_ctx *ctx;
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
+ ctx->cpl.u.blob_basic.cb_fn = cb_fn;
+ ctx->cpl.u.blob_basic.cb_arg = cb_arg;
+ ctx->blob = blob;
+
+ /* Freeze I/O on blob */
+ blob->frozen_refcnt++;
+
+ if (blob->frozen_refcnt == 1) {
+ spdk_for_each_channel(blob->bs, _spdk_blob_io_sync, ctx, _spdk_blob_io_cpl);
+ } else {
+ cb_fn(cb_arg, 0);
+ free(ctx);
+ }
+}
+
+static void
+_spdk_blob_unfreeze_io(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ struct freeze_io_ctx *ctx;
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
+ ctx->cpl.u.blob_basic.cb_fn = cb_fn;
+ ctx->cpl.u.blob_basic.cb_arg = cb_arg;
+ ctx->blob = blob;
+
+ assert(blob->frozen_refcnt > 0);
+
+ blob->frozen_refcnt--;
+
+ if (blob->frozen_refcnt == 0) {
+ spdk_for_each_channel(blob->bs, _spdk_blob_execute_queued_io, ctx, _spdk_blob_io_cpl);
+ } else {
+ cb_fn(cb_arg, 0);
+ free(ctx);
+ }
+}
+
static int
_spdk_blob_mark_clean(struct spdk_blob *blob)
{
uint32_t *pages = NULL;
assert(blob != NULL);
- assert(blob->state == SPDK_BLOB_STATE_LOADING ||
- blob->state == SPDK_BLOB_STATE_SYNCING);
if (blob->active.num_clusters) {
assert(blob->active.clusters);
clusters = calloc(blob->active.num_clusters, sizeof(*blob->active.clusters));
if (!clusters) {
- return -1;
+ return -ENOMEM;
}
memcpy(clusters, blob->active.clusters, blob->active.num_clusters * sizeof(*clusters));
}
pages = calloc(blob->active.num_pages, sizeof(*blob->active.pages));
if (!pages) {
free(clusters);
- return -1;
+ return -ENOMEM;
}
memcpy(pages, blob->active.pages, blob->active.num_pages * sizeof(*pages));
}
blob->active.clusters = clusters;
blob->active.pages = pages;
- blob->state = SPDK_BLOB_STATE_CLEAN;
+ /* If the metadata was dirtied again while the metadata was being written to disk,
+ * we do not want to revert the DIRTY state back to CLEAN here.
+ */
+ if (blob->state == SPDK_BLOB_STATE_LOADING) {
+ blob->state = SPDK_BLOB_STATE_CLEAN;
+ }
return 0;
}
-static void
+static int
+_spdk_blob_deserialize_xattr(struct spdk_blob *blob,
+ struct spdk_blob_md_descriptor_xattr *desc_xattr, bool internal)
+{
+ struct spdk_xattr *xattr;
+
+ if (desc_xattr->length != sizeof(desc_xattr->name_length) +
+ sizeof(desc_xattr->value_length) +
+ desc_xattr->name_length + desc_xattr->value_length) {
+ return -EINVAL;
+ }
+
+ xattr = calloc(1, sizeof(*xattr));
+ if (xattr == NULL) {
+ return -ENOMEM;
+ }
+
+ xattr->name = malloc(desc_xattr->name_length + 1);
+ if (xattr->name == NULL) {
+ free(xattr);
+ return -ENOMEM;
+ }
+ memcpy(xattr->name, desc_xattr->name, desc_xattr->name_length);
+ xattr->name[desc_xattr->name_length] = '\0';
+
+ xattr->value = malloc(desc_xattr->value_length);
+ if (xattr->value == NULL) {
+ free(xattr->name);
+ free(xattr);
+ return -ENOMEM;
+ }
+ xattr->value_len = desc_xattr->value_length;
+ memcpy(xattr->value,
+ (void *)((uintptr_t)desc_xattr->name + desc_xattr->name_length),
+ desc_xattr->value_length);
+
+ TAILQ_INSERT_TAIL(internal ? &blob->xattrs_internal : &blob->xattrs, xattr, link);
+
+ return 0;
+}
+
+
+static int
_spdk_blob_parse_page(const struct spdk_blob_md_page *page, struct spdk_blob *blob)
{
struct spdk_blob_md_descriptor *desc;
/* If padding and length are 0, this terminates the page */
break;
}
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_FLAGS) {
+ struct spdk_blob_md_descriptor_flags *desc_flags;
+
+ desc_flags = (struct spdk_blob_md_descriptor_flags *)desc;
+
+ if (desc_flags->length != sizeof(*desc_flags) - sizeof(*desc)) {
+ return -EINVAL;
+ }
+
+ if ((desc_flags->invalid_flags | SPDK_BLOB_INVALID_FLAGS_MASK) !=
+ SPDK_BLOB_INVALID_FLAGS_MASK) {
+ return -EINVAL;
+ }
+
+ if ((desc_flags->data_ro_flags | SPDK_BLOB_DATA_RO_FLAGS_MASK) !=
+ SPDK_BLOB_DATA_RO_FLAGS_MASK) {
+ blob->data_ro = true;
+ blob->md_ro = true;
+ }
+
+ if ((desc_flags->md_ro_flags | SPDK_BLOB_MD_RO_FLAGS_MASK) !=
+ SPDK_BLOB_MD_RO_FLAGS_MASK) {
+ blob->md_ro = true;
+ }
+
+ if ((desc_flags->data_ro_flags & SPDK_BLOB_READ_ONLY)) {
+ blob->data_ro = true;
+ blob->md_ro = true;
+ }
+
+ blob->invalid_flags = desc_flags->invalid_flags;
+ blob->data_ro_flags = desc_flags->data_ro_flags;
+ blob->md_ro_flags = desc_flags->md_ro_flags;
+
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_EXTENT) {
struct spdk_blob_md_descriptor_extent *desc_extent;
unsigned int i, j;
desc_extent = (struct spdk_blob_md_descriptor_extent *)desc;
- assert(desc_extent->length > 0);
- assert(desc_extent->length % sizeof(desc_extent->extents[0]) == 0);
+ if (desc_extent->length == 0 ||
+ (desc_extent->length % sizeof(desc_extent->extents[0]) != 0)) {
+ return -EINVAL;
+ }
for (i = 0; i < desc_extent->length / sizeof(desc_extent->extents[0]); i++) {
for (j = 0; j < desc_extent->extents[i].length; j++) {
- assert(spdk_bit_array_get(blob->bs->used_clusters, desc_extent->extents[i].cluster_idx + j));
+ if (desc_extent->extents[i].cluster_idx != 0) {
+ if (!spdk_bit_array_get(blob->bs->used_clusters,
+ desc_extent->extents[i].cluster_idx + j)) {
+ return -EINVAL;
+ }
+ }
cluster_count++;
}
}
- assert(cluster_count > 0);
+ if (cluster_count == 0) {
+ return -EINVAL;
+ }
tmp = realloc(blob->active.clusters, cluster_count * sizeof(uint64_t));
- assert(tmp != NULL);
+ if (tmp == NULL) {
+ return -ENOMEM;
+ }
blob->active.clusters = tmp;
blob->active.cluster_array_size = cluster_count;
for (i = 0; i < desc_extent->length / sizeof(desc_extent->extents[0]); i++) {
for (j = 0; j < desc_extent->extents[i].length; j++) {
- blob->active.clusters[blob->active.num_clusters++] = _spdk_bs_cluster_to_lba(blob->bs,
- desc_extent->extents[i].cluster_idx + j);
+ if (desc_extent->extents[i].cluster_idx != 0) {
+ blob->active.clusters[blob->active.num_clusters++] = _spdk_bs_cluster_to_lba(blob->bs,
+ desc_extent->extents[i].cluster_idx + j);
+ } else if (spdk_blob_is_thin_provisioned(blob)) {
+ blob->active.clusters[blob->active.num_clusters++] = 0;
+ } else {
+ return -EINVAL;
+ }
}
}
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR) {
- struct spdk_blob_md_descriptor_xattr *desc_xattr;
- struct spdk_xattr *xattr;
+ int rc;
- desc_xattr = (struct spdk_blob_md_descriptor_xattr *)desc;
-
- xattr = calloc(1, sizeof(*xattr));
- assert(xattr != NULL);
-
- xattr->name = malloc(desc_xattr->name_length + 1);
- assert(xattr->name);
- strncpy(xattr->name, desc_xattr->name, desc_xattr->name_length);
- xattr->name[desc_xattr->name_length] = '\0';
-
- xattr->value = malloc(desc_xattr->value_length);
- assert(xattr->value != NULL);
- xattr->value_len = desc_xattr->value_length;
- memcpy(xattr->value,
- (void *)((uintptr_t)desc_xattr->name + desc_xattr->name_length),
- desc_xattr->value_length);
+ rc = _spdk_blob_deserialize_xattr(blob,
+ (struct spdk_blob_md_descriptor_xattr *) desc, false);
+ if (rc != 0) {
+ return rc;
+ }
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL) {
+ int rc;
- TAILQ_INSERT_TAIL(&blob->xattrs, xattr, link);
+ rc = _spdk_blob_deserialize_xattr(blob,
+ (struct spdk_blob_md_descriptor_xattr *) desc, true);
+ if (rc != 0) {
+ return rc;
+ }
} else {
- /* Error */
- break;
+ /* Unrecognized descriptor type. Do not fail - just continue to the
+ * next descriptor. If this descriptor is associated with some feature
+ * defined in a newer version of blobstore, that version of blobstore
+ * should create and set an associated feature flag to specify if this
+ * blob can be loaded or not.
+ */
}
/* Advance to the next descriptor */
}
desc = (struct spdk_blob_md_descriptor *)((uintptr_t)page->descriptors + cur_desc);
}
+
+ return 0;
}
static int
{
const struct spdk_blob_md_page *page;
uint32_t i;
+ int rc;
assert(page_count > 0);
assert(pages[0].sequence_num == 0);
assert(blob != NULL);
assert(blob->state == SPDK_BLOB_STATE_LOADING);
assert(blob->active.clusters == NULL);
- assert(blob->id == pages[0].id);
- assert(blob->state == SPDK_BLOB_STATE_LOADING);
+
+ /* The blobid provided doesn't match what's in the MD, this can
+ * happen for example if a bogus blobid is passed in through open.
+ */
+ if (blob->id != pages[0].id) {
+ SPDK_ERRLOG("Blobid (%lu) doesn't match what's in metadata (%lu)\n",
+ blob->id, pages[0].id);
+ return -ENOENT;
+ }
for (i = 0; i < page_count; i++) {
page = &pages[i];
assert(page->id == blob->id);
assert(page->sequence_num == i);
- _spdk_blob_parse_page(page, blob);
+ rc = _spdk_blob_parse_page(page, blob);
+ if (rc != 0) {
+ return rc;
+ }
}
return 0;
if (*page_count == 0) {
assert(*pages == NULL);
*page_count = 1;
- *pages = spdk_malloc(sizeof(struct spdk_blob_md_page),
- sizeof(struct spdk_blob_md_page),
- NULL);
+ *pages = spdk_dma_malloc(SPDK_BS_PAGE_SIZE,
+ SPDK_BS_PAGE_SIZE,
+ NULL);
} else {
assert(*pages != NULL);
(*page_count)++;
- *pages = spdk_realloc(*pages,
- sizeof(struct spdk_blob_md_page) * (*page_count),
- sizeof(struct spdk_blob_md_page),
- NULL);
+ *pages = spdk_dma_realloc(*pages,
+ SPDK_BS_PAGE_SIZE * (*page_count),
+ SPDK_BS_PAGE_SIZE,
+ NULL);
}
if (*pages == NULL) {
static int
_spdk_blob_serialize_xattr(const struct spdk_xattr *xattr,
uint8_t *buf, size_t buf_sz,
- size_t *required_sz)
+ size_t *required_sz, bool internal)
{
struct spdk_blob_md_descriptor_xattr *desc;
desc = (struct spdk_blob_md_descriptor_xattr *)buf;
- desc->type = SPDK_MD_DESCRIPTOR_TYPE_XATTR;
+ desc->type = internal ? SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL : SPDK_MD_DESCRIPTOR_TYPE_XATTR;
desc->length = sizeof(desc->name_length) +
sizeof(desc->value_length) +
strlen(xattr->name) +
struct spdk_blob_md_descriptor_extent *desc;
size_t cur_sz;
uint64_t i, extent_idx;
- uint32_t lba, lba_per_cluster, lba_count;
+ uint64_t lba, lba_per_cluster, lba_count;
/* The buffer must have room for at least one extent */
cur_sz = sizeof(struct spdk_blob_md_descriptor) + sizeof(desc->extents[0]);
if ((lba + lba_count) == blob->active.clusters[i]) {
lba_count += lba_per_cluster;
continue;
+ } else if (lba == 0 && blob->active.clusters[i] == 0) {
+ lba_count += lba_per_cluster;
+ continue;
}
desc->extents[extent_idx].cluster_idx = lba / lba_per_cluster;
desc->extents[extent_idx].length = lba_count / lba_per_cluster;
return;
}
-static int
-_spdk_blob_serialize(const struct spdk_blob *blob, struct spdk_blob_md_page **pages,
- uint32_t *page_count)
+static void
+_spdk_blob_serialize_flags(const struct spdk_blob *blob,
+ uint8_t *buf, size_t *buf_sz)
{
- struct spdk_blob_md_page *cur_page;
- const struct spdk_xattr *xattr;
- int rc;
- uint8_t *buf;
- size_t remaining_sz;
+ struct spdk_blob_md_descriptor_flags *desc;
- assert(pages != NULL);
- assert(page_count != NULL);
- assert(blob != NULL);
- assert(blob->state == SPDK_BLOB_STATE_SYNCING);
+ /*
+ * Flags get serialized first, so we should always have room for the flags
+ * descriptor.
+ */
+ assert(*buf_sz >= sizeof(*desc));
- *pages = NULL;
- *page_count = 0;
+ desc = (struct spdk_blob_md_descriptor_flags *)buf;
+ desc->type = SPDK_MD_DESCRIPTOR_TYPE_FLAGS;
+ desc->length = sizeof(*desc) - sizeof(struct spdk_blob_md_descriptor);
+ desc->invalid_flags = blob->invalid_flags;
+ desc->data_ro_flags = blob->data_ro_flags;
+ desc->md_ro_flags = blob->md_ro_flags;
- /* A blob always has at least 1 page, even if it has no descriptors */
- rc = _spdk_blob_serialize_add_page(blob, pages, page_count, &cur_page);
- if (rc < 0) {
- return rc;
- }
+ *buf_sz -= sizeof(*desc);
+}
- buf = (uint8_t *)cur_page->descriptors;
- remaining_sz = sizeof(cur_page->descriptors);
+static int
+_spdk_blob_serialize_xattrs(const struct spdk_blob *blob,
+ const struct spdk_xattr_tailq *xattrs, bool internal,
+ struct spdk_blob_md_page **pages,
+ struct spdk_blob_md_page *cur_page,
+ uint32_t *page_count, uint8_t **buf,
+ size_t *remaining_sz)
+{
+ const struct spdk_xattr *xattr;
+ int rc;
- /* Serialize xattrs */
- TAILQ_FOREACH(xattr, &blob->xattrs, link) {
+ TAILQ_FOREACH(xattr, xattrs, link) {
size_t required_sz = 0;
+
rc = _spdk_blob_serialize_xattr(xattr,
- buf, remaining_sz,
- &required_sz);
+ *buf, *remaining_sz,
+ &required_sz, internal);
if (rc < 0) {
/* Need to add a new page to the chain */
rc = _spdk_blob_serialize_add_page(blob, pages, page_count,
&cur_page);
if (rc < 0) {
- spdk_free(*pages);
+ spdk_dma_free(*pages);
*pages = NULL;
*page_count = 0;
return rc;
}
- buf = (uint8_t *)cur_page->descriptors;
- remaining_sz = sizeof(cur_page->descriptors);
+ *buf = (uint8_t *)cur_page->descriptors;
+ *remaining_sz = sizeof(cur_page->descriptors);
/* Try again */
required_sz = 0;
rc = _spdk_blob_serialize_xattr(xattr,
- buf, remaining_sz,
- &required_sz);
+ *buf, *remaining_sz,
+ &required_sz, internal);
if (rc < 0) {
- spdk_free(*pages);
+ spdk_dma_free(*pages);
*pages = NULL;
*page_count = 0;
- return -1;
+ return rc;
}
}
- remaining_sz -= required_sz;
- buf += required_sz;
+ *remaining_sz -= required_sz;
+ *buf += required_sz;
+ }
+
+ return 0;
+}
+
+static int
+_spdk_blob_serialize(const struct spdk_blob *blob, struct spdk_blob_md_page **pages,
+ uint32_t *page_count)
+{
+ struct spdk_blob_md_page *cur_page;
+ int rc;
+ uint8_t *buf;
+ size_t remaining_sz;
+ uint64_t last_cluster;
+
+ assert(pages != NULL);
+ assert(page_count != NULL);
+ assert(blob != NULL);
+ assert(blob->state == SPDK_BLOB_STATE_DIRTY);
+
+ *pages = NULL;
+ *page_count = 0;
+
+ /* A blob always has at least 1 page, even if it has no descriptors */
+ rc = _spdk_blob_serialize_add_page(blob, pages, page_count, &cur_page);
+ if (rc < 0) {
+ return rc;
+ }
+
+ buf = (uint8_t *)cur_page->descriptors;
+ remaining_sz = sizeof(cur_page->descriptors);
+
+ /* Serialize flags */
+ _spdk_blob_serialize_flags(blob, buf, &remaining_sz);
+ buf += sizeof(struct spdk_blob_md_descriptor_flags);
+
+ /* Serialize xattrs */
+ rc = _spdk_blob_serialize_xattrs(blob, &blob->xattrs, false,
+ pages, cur_page, page_count, &buf, &remaining_sz);
+ if (rc < 0) {
+ return rc;
+ }
+
+ /* Serialize internal xattrs */
+ rc = _spdk_blob_serialize_xattrs(blob, &blob->xattrs_internal, true,
+ pages, cur_page, page_count, &buf, &remaining_sz);
+ if (rc < 0) {
+ return rc;
}
/* Serialize extents */
- uint64_t last_cluster = 0;
+ last_cluster = 0;
while (last_cluster < blob->active.num_clusters) {
_spdk_blob_serialize_extent(blob, last_cluster, &last_cluster,
buf, remaining_sz);
}
struct spdk_blob_load_ctx {
- struct spdk_blob *blob;
+ struct spdk_blob *blob;
struct spdk_blob_md_page *pages;
uint32_t num_pages;
+ spdk_bs_sequence_t *seq;
spdk_bs_sequence_cpl cb_fn;
void *cb_arg;
};
-static void
-_spdk_blob_load_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+static uint32_t
+_spdk_blob_md_page_calc_crc(void *page)
{
- struct spdk_blob_load_ctx *ctx = cb_arg;
- struct spdk_blob *blob = ctx->blob;
- struct spdk_blob_md_page *page;
- int rc;
+ uint32_t crc;
- page = &ctx->pages[ctx->num_pages - 1];
+ crc = BLOB_CRC32C_INITIAL;
+ crc = spdk_crc32c_update(page, SPDK_BS_PAGE_SIZE - 4, crc);
+ crc ^= BLOB_CRC32C_INITIAL;
- if (page->next != SPDK_INVALID_MD_PAGE) {
- uint32_t next_page = page->next;
- uint64_t next_lba = _spdk_bs_page_to_lba(blob->bs, blob->bs->md_start + next_page);
+ return crc;
+}
- assert(next_lba < (blob->bs->md_start + blob->bs->md_len));
+static void
+_spdk_blob_load_final(void *cb_arg, int bserrno)
+{
+ struct spdk_blob_load_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
- /* Read the next page */
- ctx->num_pages++;
- ctx->pages = spdk_realloc(ctx->pages, (sizeof(*page) * ctx->num_pages),
- sizeof(*page), NULL);
- if (ctx->pages == NULL) {
- ctx->cb_fn(seq, ctx->cb_arg, -ENOMEM);
+ _spdk_blob_mark_clean(blob);
+
+ ctx->cb_fn(ctx->seq, ctx->cb_arg, bserrno);
+
+ /* Free the memory */
+ spdk_dma_free(ctx->pages);
+ free(ctx);
+}
+
+static void
+_spdk_blob_load_snapshot_cpl(void *cb_arg, struct spdk_blob *snapshot, int bserrno)
+{
+ struct spdk_blob_load_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
+
+ if (bserrno != 0) {
+ goto error;
+ }
+
+ blob->back_bs_dev = spdk_bs_create_blob_bs_dev(snapshot);
+
+ if (blob->back_bs_dev == NULL) {
+ bserrno = -ENOMEM;
+ goto error;
+ }
+
+ _spdk_blob_load_final(ctx, bserrno);
+ return;
+
+error:
+ SPDK_ERRLOG("Snapshot fail\n");
+ _spdk_blob_free(blob);
+ ctx->cb_fn(ctx->seq, NULL, bserrno);
+ spdk_dma_free(ctx->pages);
+ free(ctx);
+}
+
+static void
+_spdk_blob_load_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_blob_load_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob_md_page *page;
+ const void *value;
+ size_t len;
+ int rc;
+ uint32_t crc;
+
+ page = &ctx->pages[ctx->num_pages - 1];
+ crc = _spdk_blob_md_page_calc_crc(page);
+ if (crc != page->crc) {
+ SPDK_ERRLOG("Metadata page %d crc mismatch\n", ctx->num_pages);
+ _spdk_blob_free(blob);
+ ctx->cb_fn(seq, NULL, -EINVAL);
+ spdk_dma_free(ctx->pages);
+ free(ctx);
+ return;
+ }
+
+ if (page->next != SPDK_INVALID_MD_PAGE) {
+ uint32_t next_page = page->next;
+ uint64_t next_lba = _spdk_bs_page_to_lba(blob->bs, blob->bs->md_start + next_page);
+
+
+ assert(next_lba < (blob->bs->md_start + blob->bs->md_len));
+
+ /* Read the next page */
+ ctx->num_pages++;
+ ctx->pages = spdk_dma_realloc(ctx->pages, (sizeof(*page) * ctx->num_pages),
+ sizeof(*page), NULL);
+ if (ctx->pages == NULL) {
+ ctx->cb_fn(seq, ctx->cb_arg, -ENOMEM);
free(ctx);
return;
}
- spdk_bs_sequence_read(seq, &ctx->pages[ctx->num_pages - 1],
- next_lba,
- _spdk_bs_byte_to_lba(blob->bs, sizeof(*page)),
- _spdk_blob_load_cpl, ctx);
+ spdk_bs_sequence_read_dev(seq, &ctx->pages[ctx->num_pages - 1],
+ next_lba,
+ _spdk_bs_byte_to_lba(blob->bs, sizeof(*page)),
+ _spdk_blob_load_cpl, ctx);
return;
}
/* Parse the pages */
rc = _spdk_blob_parse(ctx->pages, ctx->num_pages, blob);
-
- _spdk_blob_mark_clean(blob);
-
- ctx->cb_fn(seq, ctx->cb_arg, rc);
-
- /* Free the memory */
- spdk_free(ctx->pages);
- free(ctx);
+ if (rc) {
+ _spdk_blob_free(blob);
+ ctx->cb_fn(seq, NULL, rc);
+ spdk_dma_free(ctx->pages);
+ free(ctx);
+ return;
+ }
+ ctx->seq = seq;
+
+
+ if (spdk_blob_is_thin_provisioned(blob)) {
+ rc = _spdk_blob_get_xattr_value(blob, BLOB_SNAPSHOT, &value, &len, true);
+ if (rc == 0) {
+ if (len != sizeof(spdk_blob_id)) {
+ _spdk_blob_free(blob);
+ ctx->cb_fn(seq, NULL, -EINVAL);
+ spdk_dma_free(ctx->pages);
+ free(ctx);
+ return;
+ }
+ /* open snapshot blob and continue in the callback function */
+ blob->parent_id = *(spdk_blob_id *)value;
+ spdk_bs_open_blob(blob->bs, blob->parent_id,
+ _spdk_blob_load_snapshot_cpl, ctx);
+ return;
+ } else {
+ /* add zeroes_dev for thin provisioned blob */
+ blob->back_bs_dev = spdk_bs_create_zeroes_dev();
+ }
+ } else {
+ /* standard blob */
+ blob->back_bs_dev = NULL;
+ }
+ _spdk_blob_load_final(ctx, bserrno);
}
/* Load a blob from disk given a blobid */
uint32_t page_num;
uint64_t lba;
- assert(blob != NULL);
- assert(blob->state == SPDK_BLOB_STATE_CLEAN ||
- blob->state == SPDK_BLOB_STATE_DIRTY);
+ _spdk_blob_verify_md_op(blob);
bs = blob->bs;
}
ctx->blob = blob;
- ctx->pages = spdk_realloc(ctx->pages, sizeof(struct spdk_blob_md_page),
- sizeof(struct spdk_blob_md_page), NULL);
+ ctx->pages = spdk_dma_realloc(ctx->pages, SPDK_BS_PAGE_SIZE,
+ SPDK_BS_PAGE_SIZE, NULL);
if (!ctx->pages) {
free(ctx);
cb_fn(seq, cb_arg, -ENOMEM);
blob->state = SPDK_BLOB_STATE_LOADING;
- spdk_bs_sequence_read(seq, &ctx->pages[0], lba,
- _spdk_bs_byte_to_lba(bs, sizeof(struct spdk_blob_md_page)),
- _spdk_blob_load_cpl, ctx);
+ spdk_bs_sequence_read_dev(seq, &ctx->pages[0], lba,
+ _spdk_bs_byte_to_lba(bs, SPDK_BS_PAGE_SIZE),
+ _spdk_blob_load_cpl, ctx);
}
struct spdk_blob_persist_ctx {
- struct spdk_blob *blob;
+ struct spdk_blob *blob;
+
+ struct spdk_bs_super_block *super;
struct spdk_blob_md_page *pages;
uint64_t idx;
+ spdk_bs_sequence_t *seq;
spdk_bs_sequence_cpl cb_fn;
void *cb_arg;
};
static void
_spdk_blob_persist_complete(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_blob_persist_ctx *ctx = cb_arg;
- struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob_persist_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
if (bserrno == 0) {
_spdk_blob_mark_clean(blob);
ctx->cb_fn(seq, ctx->cb_arg, bserrno);
/* Free the memory */
- spdk_free(ctx->pages);
+ spdk_dma_free(ctx->pages);
free(ctx);
}
static void
_spdk_blob_persist_unmap_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_blob_persist_ctx *ctx = cb_arg;
- struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob_persist_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
struct spdk_blob_store *bs = blob->bs;
void *tmp;
size_t i;
for (i = blob->active.num_clusters; i < blob->active.cluster_array_size; i++) {
uint32_t cluster_num = _spdk_bs_lba_to_cluster(bs, blob->active.clusters[i]);
- _spdk_bs_release_cluster(bs, cluster_num);
+ /* Nothing to release if it was not allocated */
+ if (blob->active.clusters[i] != 0) {
+ _spdk_bs_release_cluster(bs, cluster_num);
+ }
}
if (blob->active.num_clusters == 0) {
static void
_spdk_blob_persist_unmap_clusters(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_blob_persist_ctx *ctx = cb_arg;
- struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob_persist_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
struct spdk_blob_store *bs = blob->bs;
spdk_bs_batch_t *batch;
size_t i;
+ uint64_t lba;
+ uint32_t lba_count;
/* Clusters don't move around in blobs. The list shrinks or grows
* at the end, but no changes ever occur in the middle of the list.
batch = spdk_bs_sequence_to_batch(seq, _spdk_blob_persist_unmap_clusters_cpl, ctx);
/* Unmap all clusters that were truncated */
+ lba = 0;
+ lba_count = 0;
for (i = blob->active.num_clusters; i < blob->active.cluster_array_size; i++) {
- uint64_t lba = blob->active.clusters[i];
- uint32_t lba_count = _spdk_bs_cluster_to_lba(bs, 1);
+ uint64_t next_lba = blob->active.clusters[i];
+ uint32_t next_lba_count = _spdk_bs_cluster_to_lba(bs, 1);
+
+ if (next_lba > 0 && (lba + lba_count) == next_lba) {
+ /* This cluster is contiguous with the previous one. */
+ lba_count += next_lba_count;
+ continue;
+ }
+
+ /* This cluster is not contiguous with the previous one. */
- spdk_bs_batch_unmap(batch, lba, lba_count);
+ /* If a run of LBAs previously existing, send them
+ * as an unmap.
+ */
+ if (lba_count > 0) {
+ spdk_bs_batch_unmap_dev(batch, lba, lba_count);
+ }
+
+ /* Start building the next batch */
+ lba = next_lba;
+ if (next_lba > 0) {
+ lba_count = next_lba_count;
+ } else {
+ lba_count = 0;
+ }
+ }
+
+ /* If we ended with a contiguous set of LBAs, send the unmap now */
+ if (lba_count > 0) {
+ spdk_bs_batch_unmap_dev(batch, lba, lba_count);
}
spdk_bs_batch_close(batch);
}
static void
-_spdk_blob_persist_unmap_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_blob_persist_zero_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
struct spdk_blob_persist_ctx *ctx = cb_arg;
- struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob *blob = ctx->blob;
struct spdk_blob_store *bs = blob->bs;
size_t i;
/* This loop starts at 1 because the first page is special and handled
* below. The pages (except the first) are never written in place,
- * so any pages in the clean list must be unmapped.
+ * so any pages in the clean list must be zeroed.
*/
for (i = 1; i < blob->clean.num_pages; i++) {
spdk_bit_array_clear(bs->used_md_pages, blob->clean.pages[i]);
}
static void
-_spdk_blob_persist_unmap_pages(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_blob_persist_zero_pages(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_blob_persist_ctx *ctx = cb_arg;
- struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob_persist_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
struct spdk_blob_store *bs = blob->bs;
uint64_t lba;
uint32_t lba_count;
spdk_bs_batch_t *batch;
size_t i;
- batch = spdk_bs_sequence_to_batch(seq, _spdk_blob_persist_unmap_pages_cpl, ctx);
+ batch = spdk_bs_sequence_to_batch(seq, _spdk_blob_persist_zero_pages_cpl, ctx);
- lba_count = _spdk_bs_byte_to_lba(bs, sizeof(struct spdk_blob_md_page));
+ lba_count = _spdk_bs_byte_to_lba(bs, SPDK_BS_PAGE_SIZE);
/* This loop starts at 1 because the first page is special and handled
* below. The pages (except the first) are never written in place,
- * so any pages in the clean list must be unmapped.
+ * so any pages in the clean list must be zeroed.
*/
for (i = 1; i < blob->clean.num_pages; i++) {
lba = _spdk_bs_page_to_lba(bs, bs->md_start + blob->clean.pages[i]);
- spdk_bs_batch_unmap(batch, lba, lba_count);
+ spdk_bs_batch_write_zeroes_dev(batch, lba, lba_count);
}
- /* The first page will only be unmapped if this is a delete. */
+ /* The first page will only be zeroed if this is a delete. */
if (blob->active.num_pages == 0) {
uint32_t page_num;
page_num = _spdk_bs_blobid_to_page(blob->id);
lba = _spdk_bs_page_to_lba(bs, bs->md_start + page_num);
- spdk_bs_batch_unmap(batch, lba, lba_count);
+ spdk_bs_batch_write_zeroes_dev(batch, lba, lba_count);
}
spdk_bs_batch_close(batch);
if (blob->active.num_pages == 0) {
/* Move on to the next step */
- _spdk_blob_persist_unmap_pages(seq, ctx, 0);
+ _spdk_blob_persist_zero_pages(seq, ctx, 0);
return;
}
/* The first page in the metadata goes where the blobid indicates */
lba = _spdk_bs_page_to_lba(bs, bs->md_start + _spdk_bs_blobid_to_page(blob->id));
- spdk_bs_sequence_write(seq, page, lba, lba_count,
- _spdk_blob_persist_unmap_pages, ctx);
+ spdk_bs_sequence_write_dev(seq, page, lba, lba_count,
+ _spdk_blob_persist_zero_pages, ctx);
}
static void
_spdk_blob_persist_write_page_chain(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_blob_persist_ctx *ctx = cb_arg;
- struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob_persist_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
struct spdk_blob_store *bs = blob->bs;
- uint64_t lba;
+ uint64_t lba;
uint32_t lba_count;
struct spdk_blob_md_page *page;
spdk_bs_batch_t *batch;
lba = _spdk_bs_page_to_lba(bs, bs->md_start + blob->active.pages[i]);
- spdk_bs_batch_write(batch, page, lba, lba_count);
+ spdk_bs_batch_write_dev(batch, page, lba, lba_count);
}
spdk_bs_batch_close(batch);
}
static int
-_spdk_resize_blob(struct spdk_blob *blob, uint64_t sz)
+_spdk_blob_resize(struct spdk_blob *blob, uint64_t sz)
{
uint64_t i;
uint64_t *tmp;
uint64_t lfc; /* lowest free cluster */
+ uint64_t num_clusters;
struct spdk_blob_store *bs;
bs = blob->bs;
- assert(blob->state != SPDK_BLOB_STATE_LOADING &&
- blob->state != SPDK_BLOB_STATE_SYNCING);
+ _spdk_blob_verify_md_op(blob);
if (blob->active.num_clusters == sz) {
return 0;
* larger without syncing, then the cluster array already
* contains spare assigned clusters we can use.
*/
- blob->active.num_clusters = spdk_min(blob->active.cluster_array_size,
- sz);
+ num_clusters = spdk_min(blob->active.cluster_array_size,
+ sz);
+ } else {
+ num_clusters = blob->active.num_clusters;
}
- blob->state = SPDK_BLOB_STATE_DIRTY;
-
/* Do two passes - one to verify that we can obtain enough clusters
* and another to actually claim them.
*/
- lfc = 0;
- for (i = blob->active.num_clusters; i < sz; i++) {
- lfc = spdk_bit_array_find_first_clear(bs->used_clusters, lfc);
- if (lfc >= bs->total_clusters) {
- /* No more free clusters. Cannot satisfy the request */
- assert(false);
- return -1;
+ if (spdk_blob_is_thin_provisioned(blob) == false) {
+ lfc = 0;
+ for (i = num_clusters; i < sz; i++) {
+ lfc = spdk_bit_array_find_first_clear(bs->used_clusters, lfc);
+ if (lfc == UINT32_MAX) {
+ /* No more free clusters. Cannot satisfy the request */
+ return -ENOSPC;
+ }
+ lfc++;
}
- lfc++;
}
- if (sz > blob->active.num_clusters) {
+ if (sz > num_clusters) {
/* Expand the cluster array if necessary.
* We only shrink the array when persisting.
*/
tmp = realloc(blob->active.clusters, sizeof(uint64_t) * sz);
if (sz > 0 && tmp == NULL) {
- assert(false);
- return -1;
+ return -ENOMEM;
}
+ memset(tmp + blob->active.cluster_array_size, 0,
+ sizeof(uint64_t) * (sz - blob->active.cluster_array_size));
blob->active.clusters = tmp;
blob->active.cluster_array_size = sz;
}
- lfc = 0;
- for (i = blob->active.num_clusters; i < sz; i++) {
- lfc = spdk_bit_array_find_first_clear(bs->used_clusters, lfc);
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Claiming cluster %lu for blob %lu\n", lfc, blob->id);
- _spdk_bs_claim_cluster(bs, lfc);
- blob->active.clusters[i] = _spdk_bs_cluster_to_lba(bs, lfc);
- lfc++;
+ blob->state = SPDK_BLOB_STATE_DIRTY;
+
+ if (spdk_blob_is_thin_provisioned(blob) == false) {
+ lfc = 0;
+ for (i = num_clusters; i < sz; i++) {
+ _spdk_bs_allocate_cluster(blob, i, &lfc, true);
+ lfc++;
+ }
}
blob->active.num_clusters = sz;
return 0;
}
-/* Write a blob to disk */
static void
-_spdk_blob_persist(spdk_bs_sequence_t *seq, struct spdk_blob *blob,
- spdk_bs_sequence_cpl cb_fn, void *cb_arg)
+_spdk_blob_persist_start(struct spdk_blob_persist_ctx *ctx)
{
- struct spdk_blob_persist_ctx *ctx;
- int rc;
+ spdk_bs_sequence_t *seq = ctx->seq;
+ struct spdk_blob *blob = ctx->blob;
+ struct spdk_blob_store *bs = blob->bs;
uint64_t i;
uint32_t page_num;
- struct spdk_blob_store *bs;
-
- assert(blob != NULL);
- assert(blob->state == SPDK_BLOB_STATE_CLEAN ||
- blob->state == SPDK_BLOB_STATE_DIRTY);
-
- if (blob->state == SPDK_BLOB_STATE_CLEAN) {
- cb_fn(seq, cb_arg, 0);
- return;
- }
-
- bs = blob->bs;
-
- ctx = calloc(1, sizeof(*ctx));
- if (!ctx) {
- cb_fn(seq, cb_arg, -ENOMEM);
- return;
- }
- ctx->blob = blob;
- ctx->cb_fn = cb_fn;
- ctx->cb_arg = cb_arg;
-
- blob->state = SPDK_BLOB_STATE_SYNCING;
+ void *tmp;
+ int rc;
if (blob->active.num_pages == 0) {
/* This is the signal that the blob should be deleted.
* Immediately jump to the clean up routine. */
assert(blob->clean.num_pages > 0);
ctx->idx = blob->clean.num_pages - 1;
- _spdk_blob_persist_unmap_pages(seq, ctx, 0);
+ blob->state = SPDK_BLOB_STATE_CLEAN;
+ _spdk_blob_persist_zero_pages(seq, ctx, 0);
return;
}
/* Generate the new metadata */
rc = _spdk_blob_serialize(blob, &ctx->pages, &blob->active.num_pages);
if (rc < 0) {
- free(ctx);
- cb_fn(seq, cb_arg, rc);
+ _spdk_blob_persist_complete(seq, ctx, rc);
return;
}
assert(blob->active.num_pages >= 1);
/* Resize the cache of page indices */
- blob->active.pages = realloc(blob->active.pages,
- blob->active.num_pages * sizeof(*blob->active.pages));
- if (!blob->active.pages) {
- free(ctx);
- cb_fn(seq, cb_arg, -ENOMEM);
+ tmp = realloc(blob->active.pages, blob->active.num_pages * sizeof(*blob->active.pages));
+ if (!tmp) {
+ _spdk_blob_persist_complete(seq, ctx, -ENOMEM);
return;
}
+ blob->active.pages = tmp;
/* Assign this metadata to pages. This requires two passes -
* one to verify that there are enough pages and a second
/* Note that this loop starts at one. The first page location is fixed by the blobid. */
for (i = 1; i < blob->active.num_pages; i++) {
page_num = spdk_bit_array_find_first_clear(bs->used_md_pages, page_num);
- if (page_num >= spdk_bit_array_capacity(bs->used_md_pages)) {
- spdk_free(ctx->pages);
- free(ctx);
- blob->state = SPDK_BLOB_STATE_DIRTY;
- cb_fn(seq, cb_arg, -ENOMEM);
+ if (page_num == UINT32_MAX) {
+ _spdk_blob_persist_complete(seq, ctx, -ENOMEM);
return;
}
page_num++;
for (i = 1; i < blob->active.num_pages; i++) {
page_num = spdk_bit_array_find_first_clear(bs->used_md_pages, page_num);
ctx->pages[i - 1].next = page_num;
+ /* Now that previous metadata page is complete, calculate the crc for it. */
+ ctx->pages[i - 1].crc = _spdk_blob_md_page_calc_crc(&ctx->pages[i - 1]);
blob->active.pages[i] = page_num;
spdk_bit_array_set(bs->used_md_pages, page_num);
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Claiming page %u for blob %lu\n", page_num, blob->id);
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Claiming page %u for blob %lu\n", page_num, blob->id);
page_num++;
}
-
+ ctx->pages[i - 1].crc = _spdk_blob_md_page_calc_crc(&ctx->pages[i - 1]);
/* Start writing the metadata from last page to first */
ctx->idx = blob->active.num_pages - 1;
+ blob->state = SPDK_BLOB_STATE_CLEAN;
_spdk_blob_persist_write_page_chain(seq, ctx, 0);
}
static void
-_spdk_blob_request_submit_rw(struct spdk_blob *blob, struct spdk_io_channel *_channel,
- void *payload, uint64_t offset, uint64_t length,
- spdk_blob_op_complete cb_fn, void *cb_arg, bool read)
+_spdk_blob_persist_dirty_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- spdk_bs_batch_t *batch;
- struct spdk_bs_cpl cpl;
- uint64_t lba;
- uint32_t lba_count;
- uint8_t *buf;
- uint64_t page;
+ struct spdk_blob_persist_ctx *ctx = cb_arg;
- assert(blob != NULL);
+ ctx->blob->bs->clean = 0;
- if (offset + length > blob->active.num_clusters * blob->bs->pages_per_cluster) {
- cb_fn(cb_arg, -EINVAL);
- return;
+ spdk_dma_free(ctx->super);
+
+ _spdk_blob_persist_start(ctx);
+}
+
+static void
+_spdk_bs_write_super(spdk_bs_sequence_t *seq, struct spdk_blob_store *bs,
+ struct spdk_bs_super_block *super, spdk_bs_sequence_cpl cb_fn, void *cb_arg);
+
+
+static void
+_spdk_blob_persist_dirty(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_blob_persist_ctx *ctx = cb_arg;
+
+ ctx->super->clean = 0;
+ if (ctx->super->size == 0) {
+ ctx->super->size = ctx->blob->bs->dev->blockcnt * ctx->blob->bs->dev->blocklen;
}
- cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
- cpl.u.blob_basic.cb_fn = cb_fn;
- cpl.u.blob_basic.cb_arg = cb_arg;
+ _spdk_bs_write_super(seq, ctx->blob->bs, ctx->super, _spdk_blob_persist_dirty_cpl, ctx);
+}
- batch = spdk_bs_batch_open(_channel, &cpl);
- if (!batch) {
- cb_fn(cb_arg, -ENOMEM);
+
+/* Write a blob to disk */
+static void
+_spdk_blob_persist(spdk_bs_sequence_t *seq, struct spdk_blob *blob,
+ spdk_bs_sequence_cpl cb_fn, void *cb_arg)
+{
+ struct spdk_blob_persist_ctx *ctx;
+
+ _spdk_blob_verify_md_op(blob);
+
+ if (blob->state == SPDK_BLOB_STATE_CLEAN) {
+ cb_fn(seq, cb_arg, 0);
return;
}
- length = _spdk_bs_page_to_lba(blob->bs, length);
- page = offset;
- buf = payload;
- while (length > 0) {
- lba = _spdk_bs_blob_page_to_lba(blob, page);
- lba_count = spdk_min(length,
- _spdk_bs_page_to_lba(blob->bs,
- _spdk_bs_num_pages_to_cluster_boundary(blob, page)));
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ cb_fn(seq, cb_arg, -ENOMEM);
+ return;
+ }
+ ctx->blob = blob;
+ ctx->seq = seq;
+ ctx->cb_fn = cb_fn;
+ ctx->cb_arg = cb_arg;
- if (read) {
- spdk_bs_batch_read(batch, buf, lba, lba_count);
- } else {
- spdk_bs_batch_write(batch, buf, lba, lba_count);
+ if (blob->bs->clean) {
+ ctx->super = spdk_dma_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
+ if (!ctx->super) {
+ cb_fn(seq, cb_arg, -ENOMEM);
+ free(ctx);
+ return;
}
- length -= lba_count;
- buf += _spdk_bs_lba_to_byte(blob->bs, lba_count);
- page += _spdk_bs_lba_to_page(blob->bs, lba_count);
+ spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(blob->bs, 0),
+ _spdk_bs_byte_to_lba(blob->bs, sizeof(*ctx->super)),
+ _spdk_blob_persist_dirty, ctx);
+ } else {
+ _spdk_blob_persist_start(ctx);
}
-
- spdk_bs_batch_close(batch);
}
-static struct spdk_blob *
-_spdk_blob_lookup(struct spdk_blob_store *bs, spdk_blob_id blobid)
-{
+struct spdk_blob_copy_cluster_ctx {
struct spdk_blob *blob;
+ uint8_t *buf;
+ uint64_t page;
+ uint64_t new_cluster;
+ spdk_bs_sequence_t *seq;
+};
- TAILQ_FOREACH(blob, &bs->blobs, link) {
- if (blob->id == blobid) {
- return blob;
+static void
+_spdk_blob_allocate_and_copy_cluster_cpl(void *cb_arg, int bserrno)
+{
+ struct spdk_blob_copy_cluster_ctx *ctx = cb_arg;
+ struct spdk_bs_request_set *set = (struct spdk_bs_request_set *)ctx->seq;
+ TAILQ_HEAD(, spdk_bs_request_set) requests;
+ spdk_bs_user_op_t *op;
+
+ TAILQ_INIT(&requests);
+ TAILQ_SWAP(&set->channel->need_cluster_alloc, &requests, spdk_bs_request_set, link);
+
+ while (!TAILQ_EMPTY(&requests)) {
+ op = TAILQ_FIRST(&requests);
+ TAILQ_REMOVE(&requests, op, link);
+ if (bserrno == 0) {
+ spdk_bs_user_op_execute(op);
+ } else {
+ spdk_bs_user_op_abort(op);
}
}
- return NULL;
+ spdk_dma_free(ctx->buf);
+ free(ctx);
}
-static int
-_spdk_bs_channel_create(void *io_device, uint32_t priority, void *ctx_buf, void *unique_ctx)
+static void
+_spdk_blob_insert_cluster_cpl(void *cb_arg, int bserrno)
{
- struct spdk_blob_store *bs = io_device;
- struct spdk_bs_dev *dev = bs->dev;
- struct spdk_bs_channel *channel = ctx_buf;
- uint32_t max_ops = *(uint32_t *)unique_ctx;
- uint32_t i;
+ struct spdk_blob_copy_cluster_ctx *ctx = cb_arg;
- channel->req_mem = calloc(max_ops, sizeof(struct spdk_bs_request_set));
- if (!channel->req_mem) {
- free(channel);
- return -1;
- }
+ if (bserrno) {
+ uint32_t cluster_number;
- TAILQ_INIT(&channel->reqs);
+ if (bserrno == -EEXIST) {
+ /* The metadata insert failed because another thread
+ * allocated the cluster first. Free our cluster
+ * but continue without error. */
+ bserrno = 0;
+ }
- for (i = 0; i < max_ops; i++) {
- TAILQ_INSERT_TAIL(&channel->reqs, &channel->req_mem[i], link);
+ cluster_number = _spdk_bs_page_to_cluster(ctx->blob->bs, ctx->page);
+ _spdk_bs_release_cluster(ctx->blob->bs, cluster_number);
}
- channel->bs = bs;
- channel->dev = dev;
- channel->dev_channel = dev->create_channel(dev);
-
- return 0;
+ spdk_bs_sequence_finish(ctx->seq, bserrno);
}
static void
-_spdk_bs_channel_destroy(void *io_device, void *ctx_buf)
+_spdk_blob_write_copy_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_bs_channel *channel = ctx_buf;
+ struct spdk_blob_copy_cluster_ctx *ctx = cb_arg;
+ uint32_t cluster_number;
- free(channel->req_mem);
- channel->dev->destroy_channel(channel->dev, channel->dev_channel);
+ if (bserrno) {
+ /* The write failed, so jump to the final completion handler */
+ spdk_bs_sequence_finish(seq, bserrno);
+ return;
+ }
+
+ cluster_number = _spdk_bs_page_to_cluster(ctx->blob->bs, ctx->page);
+
+ _spdk_blob_insert_cluster_on_md_thread(ctx->blob, cluster_number, ctx->new_cluster,
+ _spdk_blob_insert_cluster_cpl, ctx);
}
static void
-_spdk_bs_free(struct spdk_blob_store *bs)
+_spdk_blob_write_copy(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_blob *blob, *blob_tmp;
-
- spdk_bs_unregister_md_thread(bs);
- spdk_io_device_unregister(bs);
+ struct spdk_blob_copy_cluster_ctx *ctx = cb_arg;
- TAILQ_FOREACH_SAFE(blob, &bs->blobs, link, blob_tmp) {
- TAILQ_REMOVE(&bs->blobs, blob, link);
- _spdk_blob_free(blob);
+ if (bserrno != 0) {
+ /* The read failed, so jump to the final completion handler */
+ spdk_bs_sequence_finish(seq, bserrno);
+ return;
}
- spdk_bit_array_free(&bs->used_md_pages);
- spdk_bit_array_free(&bs->used_clusters);
-
- bs->dev->destroy(bs->dev);
- free(bs);
+ /* Write whole cluster */
+ spdk_bs_sequence_write_dev(seq, ctx->buf,
+ _spdk_bs_cluster_to_lba(ctx->blob->bs, ctx->new_cluster),
+ _spdk_bs_cluster_to_lba(ctx->blob->bs, 1),
+ _spdk_blob_write_copy_cpl, ctx);
}
-void
-spdk_bs_opts_init(struct spdk_bs_opts *opts)
+static void
+_spdk_bs_allocate_and_copy_cluster(struct spdk_blob *blob,
+ struct spdk_io_channel *_ch,
+ uint64_t io_unit, spdk_bs_user_op_t *op)
{
- opts->cluster_sz = SPDK_BLOB_OPTS_CLUSTER_SZ;
- opts->num_md_pages = SPDK_BLOB_OPTS_NUM_MD_PAGES;
- opts->max_md_ops = SPDK_BLOB_OPTS_MAX_MD_OPS;
-}
+ struct spdk_bs_cpl cpl;
+ struct spdk_bs_channel *ch;
+ struct spdk_blob_copy_cluster_ctx *ctx;
+ uint32_t cluster_start_page;
+ uint32_t cluster_number;
+ int rc;
-static struct spdk_blob_store *
-_spdk_bs_alloc(struct spdk_bs_dev *dev, struct spdk_bs_opts *opts)
-{
- struct spdk_blob_store *bs;
+ ch = spdk_io_channel_get_ctx(_ch);
- bs = calloc(1, sizeof(struct spdk_blob_store));
- if (!bs) {
- return NULL;
+ if (!TAILQ_EMPTY(&ch->need_cluster_alloc)) {
+ /* There are already operations pending. Queue this user op
+ * and return because it will be re-executed when the outstanding
+ * cluster allocation completes. */
+ TAILQ_INSERT_TAIL(&ch->need_cluster_alloc, op, link);
+ return;
}
- TAILQ_INIT(&bs->blobs);
- bs->dev = dev;
+ /* Round the io_unit offset down to the first page in the cluster */
+ cluster_start_page = _spdk_bs_io_unit_to_cluster_start(blob, io_unit);
- /*
- * Do not use _spdk_bs_lba_to_cluster() here since blockcnt may not be an
- * even multiple of the cluster size.
- */
- bs->cluster_sz = opts->cluster_sz;
- bs->total_clusters = dev->blockcnt / (bs->cluster_sz / dev->blocklen);
- bs->pages_per_cluster = bs->cluster_sz / sizeof(struct spdk_blob_md_page);
- bs->num_free_clusters = bs->total_clusters;
- bs->used_clusters = spdk_bit_array_create(bs->total_clusters);
- if (bs->used_clusters == NULL) {
- _spdk_bs_free(bs);
- return NULL;
+ /* Calculate which index in the metadata cluster array the corresponding
+ * cluster is supposed to be at. */
+ cluster_number = _spdk_bs_io_unit_to_cluster_number(blob, io_unit);
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ spdk_bs_user_op_abort(op);
+ return;
}
- bs->max_md_ops = opts->max_md_ops;
- bs->super_blob = SPDK_BLOBID_INVALID;
+ assert(blob->bs->cluster_sz % blob->back_bs_dev->blocklen == 0);
- /* The metadata is assumed to be at least 1 page */
- bs->used_md_pages = spdk_bit_array_create(1);
+ ctx->blob = blob;
+ ctx->page = cluster_start_page;
- spdk_io_device_register(bs, _spdk_bs_channel_create, _spdk_bs_channel_destroy,
- sizeof(struct spdk_bs_channel));
- spdk_bs_register_md_thread(bs);
+ if (blob->parent_id != SPDK_BLOBID_INVALID) {
+ ctx->buf = spdk_dma_malloc(blob->bs->cluster_sz, blob->back_bs_dev->blocklen, NULL);
+ if (!ctx->buf) {
+ SPDK_ERRLOG("DMA allocation for cluster of size = %" PRIu32 " failed.\n",
+ blob->bs->cluster_sz);
+ free(ctx);
+ spdk_bs_user_op_abort(op);
+ return;
+ }
+ }
+
+ rc = _spdk_bs_allocate_cluster(blob, cluster_number, &ctx->new_cluster, false);
+ if (rc != 0) {
+ spdk_dma_free(ctx->buf);
+ free(ctx);
+ spdk_bs_user_op_abort(op);
+ return;
+ }
+
+ cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
+ cpl.u.blob_basic.cb_fn = _spdk_blob_allocate_and_copy_cluster_cpl;
+ cpl.u.blob_basic.cb_arg = ctx;
+
+ ctx->seq = spdk_bs_sequence_start(_ch, &cpl);
+ if (!ctx->seq) {
+ _spdk_bs_release_cluster(blob->bs, ctx->new_cluster);
+ spdk_dma_free(ctx->buf);
+ free(ctx);
+ spdk_bs_user_op_abort(op);
+ return;
+ }
- return bs;
+ /* Queue the user op to block other incoming operations */
+ TAILQ_INSERT_TAIL(&ch->need_cluster_alloc, op, link);
+
+ if (blob->parent_id != SPDK_BLOBID_INVALID) {
+ /* Read cluster from backing device */
+ spdk_bs_sequence_read_bs_dev(ctx->seq, blob->back_bs_dev, ctx->buf,
+ _spdk_bs_dev_page_to_lba(blob->back_bs_dev, cluster_start_page),
+ _spdk_bs_dev_byte_to_lba(blob->back_bs_dev, blob->bs->cluster_sz),
+ _spdk_blob_write_copy, ctx);
+ } else {
+ _spdk_blob_insert_cluster_on_md_thread(ctx->blob, cluster_number, ctx->new_cluster,
+ _spdk_blob_insert_cluster_cpl, ctx);
+ }
}
-/* START spdk_bs_load */
+static void
+_spdk_blob_calculate_lba_and_lba_count(struct spdk_blob *blob, uint64_t io_unit, uint64_t length,
+ uint64_t *lba, uint32_t *lba_count)
+{
+ *lba_count = length;
-struct spdk_bs_load_ctx {
- struct spdk_blob_store *bs;
- struct spdk_bs_super_block *super;
+ if (!_spdk_bs_io_unit_is_allocated(blob, io_unit)) {
+ assert(blob->back_bs_dev != NULL);
+ *lba = _spdk_bs_io_unit_to_back_dev_lba(blob, io_unit);
+ *lba_count = _spdk_bs_io_unit_to_back_dev_lba(blob, *lba_count);
+ } else {
+ *lba = _spdk_bs_blob_io_unit_to_lba(blob, io_unit);
+ }
+}
- struct spdk_bs_md_mask *mask;
+struct op_split_ctx {
+ struct spdk_blob *blob;
+ struct spdk_io_channel *channel;
+ uint64_t io_unit_offset;
+ uint64_t io_units_remaining;
+ void *curr_payload;
+ enum spdk_blob_op_type op_type;
+ spdk_bs_sequence_t *seq;
};
static void
-_spdk_bs_load_used_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_blob_request_submit_op_split_next(void *cb_arg, int bserrno)
{
- struct spdk_bs_load_ctx *ctx = cb_arg;
- uint32_t i, j;
- int rc;
+ struct op_split_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
+ struct spdk_io_channel *ch = ctx->channel;
+ enum spdk_blob_op_type op_type = ctx->op_type;
+ uint8_t *buf = ctx->curr_payload;
+ uint64_t offset = ctx->io_unit_offset;
+ uint64_t length = ctx->io_units_remaining;
+ uint64_t op_length;
+
+ if (bserrno != 0 || ctx->io_units_remaining == 0) {
+ spdk_bs_sequence_finish(ctx->seq, bserrno);
+ free(ctx);
+ return;
+ }
- /* The type must be correct */
- assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_CLUSTERS);
- /* The length of the mask (in bits) must not be greater than the length of the buffer (converted to bits) */
- assert(ctx->mask->length <= (ctx->super->used_cluster_mask_len * sizeof(
- struct spdk_blob_md_page) * 8));
- /* The length of the mask must be exactly equal to the total number of clusters*/
- assert(ctx->mask->length == ctx->bs->total_clusters);
+ op_length = spdk_min(length, _spdk_bs_num_io_units_to_cluster_boundary(blob,
+ offset));
- rc = spdk_bit_array_resize(&ctx->bs->used_clusters, ctx->bs->total_clusters);
- if (rc < 0) {
- spdk_free(ctx->super);
- spdk_free(ctx->mask);
- _spdk_bs_free(ctx->bs);
+ /* Update length and payload for next operation */
+ ctx->io_units_remaining -= op_length;
+ ctx->io_unit_offset += op_length;
+ if (op_type == SPDK_BLOB_WRITE || op_type == SPDK_BLOB_READ) {
+ ctx->curr_payload += op_length * blob->bs->io_unit_size;
+ }
+
+ switch (op_type) {
+ case SPDK_BLOB_READ:
+ spdk_blob_io_read(blob, ch, buf, offset, op_length,
+ _spdk_blob_request_submit_op_split_next, ctx);
+ break;
+ case SPDK_BLOB_WRITE:
+ spdk_blob_io_write(blob, ch, buf, offset, op_length,
+ _spdk_blob_request_submit_op_split_next, ctx);
+ break;
+ case SPDK_BLOB_UNMAP:
+ spdk_blob_io_unmap(blob, ch, offset, op_length,
+ _spdk_blob_request_submit_op_split_next, ctx);
+ break;
+ case SPDK_BLOB_WRITE_ZEROES:
+ spdk_blob_io_write_zeroes(blob, ch, offset, op_length,
+ _spdk_blob_request_submit_op_split_next, ctx);
+ break;
+ case SPDK_BLOB_READV:
+ case SPDK_BLOB_WRITEV:
+ SPDK_ERRLOG("readv/write not valid for %s\n", __func__);
+ spdk_bs_sequence_finish(ctx->seq, -EINVAL);
+ free(ctx);
+ break;
+ }
+}
+
+static void
+_spdk_blob_request_submit_op_split(struct spdk_io_channel *ch, struct spdk_blob *blob,
+ void *payload, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg, enum spdk_blob_op_type op_type)
+{
+ struct op_split_ctx *ctx;
+ spdk_bs_sequence_t *seq;
+ struct spdk_bs_cpl cpl;
+
+ assert(blob != NULL);
+
+ ctx = calloc(1, sizeof(struct op_split_ctx));
+ if (ctx == NULL) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
+ cpl.u.blob_basic.cb_fn = cb_fn;
+ cpl.u.blob_basic.cb_arg = cb_arg;
+
+ seq = spdk_bs_sequence_start(ch, &cpl);
+ if (!seq) {
free(ctx);
- spdk_bs_sequence_finish(seq, -ENOMEM);
+ cb_fn(cb_arg, -ENOMEM);
return;
}
- ctx->bs->num_free_clusters = ctx->bs->total_clusters;
- for (i = 0; i < ctx->mask->length / 8; i++) {
- uint8_t segment = ctx->mask->mask[i];
- for (j = 0; segment && (j < 8); j++) {
- if (segment & 1U) {
- spdk_bit_array_set(ctx->bs->used_clusters, (i * 8) + j);
- assert(ctx->bs->num_free_clusters > 0);
- ctx->bs->num_free_clusters--;
+ ctx->blob = blob;
+ ctx->channel = ch;
+ ctx->curr_payload = payload;
+ ctx->io_unit_offset = offset;
+ ctx->io_units_remaining = length;
+ ctx->op_type = op_type;
+ ctx->seq = seq;
+
+ _spdk_blob_request_submit_op_split_next(ctx, 0);
+}
+
+static void
+_spdk_blob_request_submit_op_single(struct spdk_io_channel *_ch, struct spdk_blob *blob,
+ void *payload, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg, enum spdk_blob_op_type op_type)
+{
+ struct spdk_bs_cpl cpl;
+ uint64_t lba;
+ uint32_t lba_count;
+
+ assert(blob != NULL);
+
+ cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
+ cpl.u.blob_basic.cb_fn = cb_fn;
+ cpl.u.blob_basic.cb_arg = cb_arg;
+
+ _spdk_blob_calculate_lba_and_lba_count(blob, offset, length, &lba, &lba_count);
+
+ if (blob->frozen_refcnt) {
+ /* This blob I/O is frozen */
+ spdk_bs_user_op_t *op;
+ struct spdk_bs_channel *bs_channel = spdk_io_channel_get_ctx(_ch);
+
+ op = spdk_bs_user_op_alloc(_ch, &cpl, op_type, blob, payload, 0, offset, length);
+ if (!op) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ TAILQ_INSERT_TAIL(&bs_channel->queued_io, op, link);
+
+ return;
+ }
+
+ switch (op_type) {
+ case SPDK_BLOB_READ: {
+ spdk_bs_batch_t *batch;
+
+ batch = spdk_bs_batch_open(_ch, &cpl);
+ if (!batch) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
+ /* Read from the blob */
+ spdk_bs_batch_read_dev(batch, payload, lba, lba_count);
+ } else {
+ /* Read from the backing block device */
+ spdk_bs_batch_read_bs_dev(batch, blob->back_bs_dev, payload, lba, lba_count);
+ }
+
+ spdk_bs_batch_close(batch);
+ break;
+ }
+ case SPDK_BLOB_WRITE:
+ case SPDK_BLOB_WRITE_ZEROES: {
+ if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
+ /* Write to the blob */
+ spdk_bs_batch_t *batch;
+
+ if (lba_count == 0) {
+ cb_fn(cb_arg, 0);
+ return;
}
- segment >>= 1U;
+
+ batch = spdk_bs_batch_open(_ch, &cpl);
+ if (!batch) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ if (op_type == SPDK_BLOB_WRITE) {
+ spdk_bs_batch_write_dev(batch, payload, lba, lba_count);
+ } else {
+ spdk_bs_batch_write_zeroes_dev(batch, lba, lba_count);
+ }
+
+ spdk_bs_batch_close(batch);
+ } else {
+ /* Queue this operation and allocate the cluster */
+ spdk_bs_user_op_t *op;
+
+ op = spdk_bs_user_op_alloc(_ch, &cpl, op_type, blob, payload, 0, offset, length);
+ if (!op) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ _spdk_bs_allocate_and_copy_cluster(blob, _ch, offset, op);
}
+ break;
}
+ case SPDK_BLOB_UNMAP: {
+ spdk_bs_batch_t *batch;
- spdk_free(ctx->super);
- spdk_free(ctx->mask);
- free(ctx);
+ batch = spdk_bs_batch_open(_ch, &cpl);
+ if (!batch) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
- spdk_bs_sequence_finish(seq, bserrno);
+ if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
+ spdk_bs_batch_unmap_dev(batch, lba, lba_count);
+ }
+
+ spdk_bs_batch_close(batch);
+ break;
+ }
+ case SPDK_BLOB_READV:
+ case SPDK_BLOB_WRITEV:
+ SPDK_ERRLOG("readv/write not valid\n");
+ cb_fn(cb_arg, -EINVAL);
+ break;
+ }
}
static void
-_spdk_bs_load_used_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_blob_request_submit_op(struct spdk_blob *blob, struct spdk_io_channel *_channel,
+ void *payload, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg, enum spdk_blob_op_type op_type)
{
- struct spdk_bs_load_ctx *ctx = cb_arg;
- uint64_t lba, lba_count;
- uint32_t i, j;
- int rc;
+ assert(blob != NULL);
- /* The type must be correct */
- assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_PAGES);
- /* The length of the mask (in bits) must not be greater than the length of the buffer (converted to bits) */
- assert(ctx->mask->length <= (ctx->super->used_page_mask_len * sizeof(struct spdk_blob_md_page) *
- 8));
- /* The length of the mask must be exactly equal to the size (in pages) of the metadata region */
- assert(ctx->mask->length == ctx->super->md_len);
+ if (blob->data_ro && op_type != SPDK_BLOB_READ) {
+ cb_fn(cb_arg, -EPERM);
+ return;
+ }
- rc = spdk_bit_array_resize(&ctx->bs->used_md_pages, ctx->mask->length);
- if (rc < 0) {
- spdk_free(ctx->super);
- spdk_free(ctx->mask);
- _spdk_bs_free(ctx->bs);
+ if (offset + length > _spdk_bs_cluster_to_lba(blob->bs, blob->active.num_clusters)) {
+ cb_fn(cb_arg, -EINVAL);
+ return;
+ }
+ if (length <= _spdk_bs_num_io_units_to_cluster_boundary(blob, offset)) {
+ _spdk_blob_request_submit_op_single(_channel, blob, payload, offset, length,
+ cb_fn, cb_arg, op_type);
+ } else {
+ _spdk_blob_request_submit_op_split(_channel, blob, payload, offset, length,
+ cb_fn, cb_arg, op_type);
+ }
+}
+
+struct rw_iov_ctx {
+ struct spdk_blob *blob;
+ struct spdk_io_channel *channel;
+ spdk_blob_op_complete cb_fn;
+ void *cb_arg;
+ bool read;
+ int iovcnt;
+ struct iovec *orig_iov;
+ uint64_t io_unit_offset;
+ uint64_t io_units_remaining;
+ uint64_t io_units_done;
+ struct iovec iov[0];
+};
+
+static void
+_spdk_rw_iov_done(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ assert(cb_arg == NULL);
+ spdk_bs_sequence_finish(seq, bserrno);
+}
+
+static void
+_spdk_rw_iov_split_next(void *cb_arg, int bserrno)
+{
+ struct rw_iov_ctx *ctx = cb_arg;
+ struct spdk_blob *blob = ctx->blob;
+ struct iovec *iov, *orig_iov;
+ int iovcnt;
+ size_t orig_iovoff;
+ uint64_t io_units_count, io_units_to_boundary, io_unit_offset;
+ uint64_t byte_count;
+
+ if (bserrno != 0 || ctx->io_units_remaining == 0) {
+ ctx->cb_fn(ctx->cb_arg, bserrno);
free(ctx);
- spdk_bs_sequence_finish(seq, -ENOMEM);
return;
}
-
- for (i = 0; i < ctx->mask->length / 8; i++) {
- uint8_t segment = ctx->mask->mask[i];
- for (j = 0; segment && (j < 8); j++) {
- if (segment & 1U) {
- spdk_bit_array_set(ctx->bs->used_md_pages, (i * 8) + j);
- }
- segment >>= 1U;
+
+ io_unit_offset = ctx->io_unit_offset;
+ io_units_to_boundary = _spdk_bs_num_io_units_to_cluster_boundary(blob, io_unit_offset);
+ io_units_count = spdk_min(ctx->io_units_remaining, io_units_to_boundary);
+ /*
+ * Get index and offset into the original iov array for our current position in the I/O sequence.
+ * byte_count will keep track of how many bytes remaining until orig_iov and orig_iovoff will
+ * point to the current position in the I/O sequence.
+ */
+ byte_count = ctx->io_units_done * blob->bs->io_unit_size;
+ orig_iov = &ctx->orig_iov[0];
+ orig_iovoff = 0;
+ while (byte_count > 0) {
+ if (byte_count >= orig_iov->iov_len) {
+ byte_count -= orig_iov->iov_len;
+ orig_iov++;
+ } else {
+ orig_iovoff = byte_count;
+ byte_count = 0;
+ }
+ }
+
+ /*
+ * Build an iov array for the next I/O in the sequence. byte_count will keep track of how many
+ * bytes of this next I/O remain to be accounted for in the new iov array.
+ */
+ byte_count = io_units_count * blob->bs->io_unit_size;
+ iov = &ctx->iov[0];
+ iovcnt = 0;
+ while (byte_count > 0) {
+ assert(iovcnt < ctx->iovcnt);
+ iov->iov_len = spdk_min(byte_count, orig_iov->iov_len - orig_iovoff);
+ iov->iov_base = orig_iov->iov_base + orig_iovoff;
+ byte_count -= iov->iov_len;
+ orig_iovoff = 0;
+ orig_iov++;
+ iov++;
+ iovcnt++;
+ }
+
+ ctx->io_unit_offset += io_units_count;
+ ctx->io_units_remaining -= io_units_count;
+ ctx->io_units_done += io_units_count;
+ iov = &ctx->iov[0];
+
+ if (ctx->read) {
+ spdk_blob_io_readv(ctx->blob, ctx->channel, iov, iovcnt, io_unit_offset,
+ io_units_count, _spdk_rw_iov_split_next, ctx);
+ } else {
+ spdk_blob_io_writev(ctx->blob, ctx->channel, iov, iovcnt, io_unit_offset,
+ io_units_count, _spdk_rw_iov_split_next, ctx);
+ }
+}
+
+static void
+_spdk_blob_request_submit_rw_iov(struct spdk_blob *blob, struct spdk_io_channel *_channel,
+ struct iovec *iov, int iovcnt, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg, bool read)
+{
+ struct spdk_bs_cpl cpl;
+
+ assert(blob != NULL);
+
+ if (!read && blob->data_ro) {
+ cb_fn(cb_arg, -EPERM);
+ return;
+ }
+
+ if (length == 0) {
+ cb_fn(cb_arg, 0);
+ return;
+ }
+
+ if (offset + length > _spdk_bs_cluster_to_lba(blob->bs, blob->active.num_clusters)) {
+ cb_fn(cb_arg, -EINVAL);
+ return;
+ }
+
+ /*
+ * For now, we implement readv/writev using a sequence (instead of a batch) to account for having
+ * to split a request that spans a cluster boundary. For I/O that do not span a cluster boundary,
+ * there will be no noticeable difference compared to using a batch. For I/O that do span a cluster
+ * boundary, the target LBAs (after blob offset to LBA translation) may not be contiguous, so we need
+ * to allocate a separate iov array and split the I/O such that none of the resulting
+ * smaller I/O cross a cluster boundary. These smaller I/O will be issued in sequence (not in parallel)
+ * but since this case happens very infrequently, any performance impact will be negligible.
+ *
+ * This could be optimized in the future to allocate a big enough iov array to account for all of the iovs
+ * for all of the smaller I/Os, pre-build all of the iov arrays for the smaller I/Os, then issue them
+ * in a batch. That would also require creating an intermediate spdk_bs_cpl that would get called
+ * when the batch was completed, to allow for freeing the memory for the iov arrays.
+ */
+ if (spdk_likely(length <= _spdk_bs_num_io_units_to_cluster_boundary(blob, offset))) {
+ uint32_t lba_count;
+ uint64_t lba;
+
+ _spdk_blob_calculate_lba_and_lba_count(blob, offset, length, &lba, &lba_count);
+
+ cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
+ cpl.u.blob_basic.cb_fn = cb_fn;
+ cpl.u.blob_basic.cb_arg = cb_arg;
+ if (blob->frozen_refcnt) {
+ /* This blob I/O is frozen */
+ spdk_bs_user_op_t *op;
+ struct spdk_bs_channel *bs_channel = spdk_io_channel_get_ctx(_channel);
+
+ op = spdk_bs_user_op_alloc(_channel, &cpl, read, blob, iov, iovcnt, offset, length);
+ if (!op) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ TAILQ_INSERT_TAIL(&bs_channel->queued_io, op, link);
+
+ return;
+ }
+
+ if (read) {
+ spdk_bs_sequence_t *seq;
+
+ seq = spdk_bs_sequence_start(_channel, &cpl);
+ if (!seq) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
+ spdk_bs_sequence_readv_dev(seq, iov, iovcnt, lba, lba_count, _spdk_rw_iov_done, NULL);
+ } else {
+ spdk_bs_sequence_readv_bs_dev(seq, blob->back_bs_dev, iov, iovcnt, lba, lba_count,
+ _spdk_rw_iov_done, NULL);
+ }
+ } else {
+ if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
+ spdk_bs_sequence_t *seq;
+
+ seq = spdk_bs_sequence_start(_channel, &cpl);
+ if (!seq) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ spdk_bs_sequence_writev_dev(seq, iov, iovcnt, lba, lba_count, _spdk_rw_iov_done, NULL);
+ } else {
+ /* Queue this operation and allocate the cluster */
+ spdk_bs_user_op_t *op;
+
+ op = spdk_bs_user_op_alloc(_channel, &cpl, SPDK_BLOB_WRITEV, blob, iov, iovcnt, offset,
+ length);
+ if (!op) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ _spdk_bs_allocate_and_copy_cluster(blob, _channel, offset, op);
+ }
+ }
+ } else {
+ struct rw_iov_ctx *ctx;
+
+ ctx = calloc(1, sizeof(struct rw_iov_ctx) + iovcnt * sizeof(struct iovec));
+ if (ctx == NULL) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->blob = blob;
+ ctx->channel = _channel;
+ ctx->cb_fn = cb_fn;
+ ctx->cb_arg = cb_arg;
+ ctx->read = read;
+ ctx->orig_iov = iov;
+ ctx->iovcnt = iovcnt;
+ ctx->io_unit_offset = offset;
+ ctx->io_units_remaining = length;
+ ctx->io_units_done = 0;
+
+ _spdk_rw_iov_split_next(ctx, 0);
+ }
+}
+
+static struct spdk_blob *
+_spdk_blob_lookup(struct spdk_blob_store *bs, spdk_blob_id blobid)
+{
+ struct spdk_blob *blob;
+
+ TAILQ_FOREACH(blob, &bs->blobs, link) {
+ if (blob->id == blobid) {
+ return blob;
+ }
+ }
+
+ return NULL;
+}
+
+static int
+_spdk_bs_channel_create(void *io_device, void *ctx_buf)
+{
+ struct spdk_blob_store *bs = io_device;
+ struct spdk_bs_channel *channel = ctx_buf;
+ struct spdk_bs_dev *dev;
+ uint32_t max_ops = bs->max_channel_ops;
+ uint32_t i;
+
+ dev = bs->dev;
+
+ channel->req_mem = calloc(max_ops, sizeof(struct spdk_bs_request_set));
+ if (!channel->req_mem) {
+ return -1;
+ }
+
+ TAILQ_INIT(&channel->reqs);
+
+ for (i = 0; i < max_ops; i++) {
+ TAILQ_INSERT_TAIL(&channel->reqs, &channel->req_mem[i], link);
+ }
+
+ channel->bs = bs;
+ channel->dev = dev;
+ channel->dev_channel = dev->create_channel(dev);
+
+ if (!channel->dev_channel) {
+ SPDK_ERRLOG("Failed to create device channel.\n");
+ free(channel->req_mem);
+ return -1;
+ }
+
+ TAILQ_INIT(&channel->need_cluster_alloc);
+ TAILQ_INIT(&channel->queued_io);
+
+ return 0;
+}
+
+static void
+_spdk_bs_channel_destroy(void *io_device, void *ctx_buf)
+{
+ struct spdk_bs_channel *channel = ctx_buf;
+ spdk_bs_user_op_t *op;
+
+ while (!TAILQ_EMPTY(&channel->need_cluster_alloc)) {
+ op = TAILQ_FIRST(&channel->need_cluster_alloc);
+ TAILQ_REMOVE(&channel->need_cluster_alloc, op, link);
+ spdk_bs_user_op_abort(op);
+ }
+
+ while (!TAILQ_EMPTY(&channel->queued_io)) {
+ op = TAILQ_FIRST(&channel->queued_io);
+ TAILQ_REMOVE(&channel->queued_io, op, link);
+ spdk_bs_user_op_abort(op);
+ }
+
+ free(channel->req_mem);
+ channel->dev->destroy_channel(channel->dev, channel->dev_channel);
+}
+
+static void
+_spdk_bs_dev_destroy(void *io_device)
+{
+ struct spdk_blob_store *bs = io_device;
+ struct spdk_blob *blob, *blob_tmp;
+
+ bs->dev->destroy(bs->dev);
+
+ TAILQ_FOREACH_SAFE(blob, &bs->blobs, link, blob_tmp) {
+ TAILQ_REMOVE(&bs->blobs, blob, link);
+ _spdk_blob_free(blob);
+ }
+
+ pthread_mutex_destroy(&bs->used_clusters_mutex);
+
+ spdk_bit_array_free(&bs->used_blobids);
+ spdk_bit_array_free(&bs->used_md_pages);
+ spdk_bit_array_free(&bs->used_clusters);
+ /*
+ * If this function is called for any reason except a successful unload,
+ * the unload_cpl type will be NONE and this will be a nop.
+ */
+ spdk_bs_call_cpl(&bs->unload_cpl, bs->unload_err);
+
+ free(bs);
+}
+
+static int
+_spdk_bs_blob_list_add(struct spdk_blob *blob)
+{
+ spdk_blob_id snapshot_id;
+ struct spdk_blob_list *snapshot_entry = NULL;
+ struct spdk_blob_list *clone_entry = NULL;
+
+ assert(blob != NULL);
+
+ snapshot_id = blob->parent_id;
+ if (snapshot_id == SPDK_BLOBID_INVALID) {
+ return 0;
+ }
+
+ TAILQ_FOREACH(snapshot_entry, &blob->bs->snapshots, link) {
+ if (snapshot_entry->id == snapshot_id) {
+ break;
+ }
+ }
+
+ if (snapshot_entry == NULL) {
+ /* Snapshot not found */
+ snapshot_entry = calloc(1, sizeof(struct spdk_blob_list));
+ if (snapshot_entry == NULL) {
+ return -ENOMEM;
+ }
+ snapshot_entry->id = snapshot_id;
+ TAILQ_INIT(&snapshot_entry->clones);
+ TAILQ_INSERT_TAIL(&blob->bs->snapshots, snapshot_entry, link);
+ } else {
+ TAILQ_FOREACH(clone_entry, &snapshot_entry->clones, link) {
+ if (clone_entry->id == blob->id) {
+ break;
+ }
+ }
+ }
+
+ if (clone_entry == NULL) {
+ /* Clone not found */
+ clone_entry = calloc(1, sizeof(struct spdk_blob_list));
+ if (clone_entry == NULL) {
+ return -ENOMEM;
+ }
+ clone_entry->id = blob->id;
+ TAILQ_INIT(&clone_entry->clones);
+ TAILQ_INSERT_TAIL(&snapshot_entry->clones, clone_entry, link);
+ snapshot_entry->clone_count++;
+ }
+
+ return 0;
+}
+
+static int
+_spdk_bs_blob_list_remove(struct spdk_blob *blob)
+{
+ struct spdk_blob_list *snapshot_entry = NULL;
+ struct spdk_blob_list *clone_entry = NULL;
+ spdk_blob_id snapshot_id;
+
+ assert(blob != NULL);
+
+ snapshot_id = blob->parent_id;
+ if (snapshot_id == SPDK_BLOBID_INVALID) {
+ return 0;
+ }
+
+ TAILQ_FOREACH(snapshot_entry, &blob->bs->snapshots, link) {
+ if (snapshot_entry->id == snapshot_id) {
+ break;
+ }
+ }
+
+ assert(snapshot_entry != NULL);
+
+ TAILQ_FOREACH(clone_entry, &snapshot_entry->clones, link) {
+ if (clone_entry->id == blob->id) {
+ break;
+ }
+ }
+
+ assert(clone_entry != NULL);
+
+ blob->parent_id = SPDK_BLOBID_INVALID;
+ TAILQ_REMOVE(&snapshot_entry->clones, clone_entry, link);
+ free(clone_entry);
+
+ snapshot_entry->clone_count--;
+ if (snapshot_entry->clone_count == 0) {
+ /* Snapshot have no more clones */
+ TAILQ_REMOVE(&blob->bs->snapshots, snapshot_entry, link);
+ free(snapshot_entry);
+ }
+
+ return 0;
+}
+
+static int
+_spdk_bs_blob_list_free(struct spdk_blob_store *bs)
+{
+ struct spdk_blob_list *snapshot_entry;
+ struct spdk_blob_list *snapshot_entry_tmp;
+ struct spdk_blob_list *clone_entry;
+ struct spdk_blob_list *clone_entry_tmp;
+
+ TAILQ_FOREACH_SAFE(snapshot_entry, &bs->snapshots, link, snapshot_entry_tmp) {
+ TAILQ_FOREACH_SAFE(clone_entry, &snapshot_entry->clones, link, clone_entry_tmp) {
+ TAILQ_REMOVE(&snapshot_entry->clones, clone_entry, link);
+ free(clone_entry);
+ }
+ TAILQ_REMOVE(&bs->snapshots, snapshot_entry, link);
+ free(snapshot_entry);
+ }
+
+ return 0;
+}
+
+static void
+_spdk_bs_free(struct spdk_blob_store *bs)
+{
+ _spdk_bs_blob_list_free(bs);
+
+ spdk_bs_unregister_md_thread(bs);
+ spdk_io_device_unregister(bs, _spdk_bs_dev_destroy);
+}
+
+void
+spdk_bs_opts_init(struct spdk_bs_opts *opts)
+{
+ opts->cluster_sz = SPDK_BLOB_OPTS_CLUSTER_SZ;
+ opts->num_md_pages = SPDK_BLOB_OPTS_NUM_MD_PAGES;
+ opts->max_md_ops = SPDK_BLOB_OPTS_MAX_MD_OPS;
+ opts->max_channel_ops = SPDK_BLOB_OPTS_DEFAULT_CHANNEL_OPS;
+ memset(&opts->bstype, 0, sizeof(opts->bstype));
+ opts->iter_cb_fn = NULL;
+ opts->iter_cb_arg = NULL;
+}
+
+static int
+_spdk_bs_opts_verify(struct spdk_bs_opts *opts)
+{
+ if (opts->cluster_sz == 0 || opts->num_md_pages == 0 || opts->max_md_ops == 0 ||
+ opts->max_channel_ops == 0) {
+ SPDK_ERRLOG("Blobstore options cannot be set to 0\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+_spdk_bs_alloc(struct spdk_bs_dev *dev, struct spdk_bs_opts *opts, struct spdk_blob_store **_bs)
+{
+ struct spdk_blob_store *bs;
+ uint64_t dev_size;
+ int rc;
+
+ dev_size = dev->blocklen * dev->blockcnt;
+ if (dev_size < opts->cluster_sz) {
+ /* Device size cannot be smaller than cluster size of blobstore */
+ SPDK_INFOLOG(SPDK_LOG_BLOB, "Device size %" PRIu64 " is smaller than cluster size %" PRIu32 "\n",
+ dev_size, opts->cluster_sz);
+ return -ENOSPC;
+ }
+ if (opts->cluster_sz < SPDK_BS_PAGE_SIZE) {
+ /* Cluster size cannot be smaller than page size */
+ SPDK_ERRLOG("Cluster size %" PRIu32 " is smaller than page size %d\n",
+ opts->cluster_sz, SPDK_BS_PAGE_SIZE);
+ return -EINVAL;
+ }
+ bs = calloc(1, sizeof(struct spdk_blob_store));
+ if (!bs) {
+ return -ENOMEM;
+ }
+
+ TAILQ_INIT(&bs->blobs);
+ TAILQ_INIT(&bs->snapshots);
+ bs->dev = dev;
+ bs->md_thread = spdk_get_thread();
+ assert(bs->md_thread != NULL);
+
+ /*
+ * Do not use _spdk_bs_lba_to_cluster() here since blockcnt may not be an
+ * even multiple of the cluster size.
+ */
+ bs->cluster_sz = opts->cluster_sz;
+ bs->total_clusters = dev->blockcnt / (bs->cluster_sz / dev->blocklen);
+ bs->pages_per_cluster = bs->cluster_sz / SPDK_BS_PAGE_SIZE;
+ bs->num_free_clusters = bs->total_clusters;
+ bs->used_clusters = spdk_bit_array_create(bs->total_clusters);
+ bs->io_unit_size = dev->blocklen;
+ if (bs->used_clusters == NULL) {
+ free(bs);
+ return -ENOMEM;
+ }
+
+ bs->max_channel_ops = opts->max_channel_ops;
+ bs->super_blob = SPDK_BLOBID_INVALID;
+ memcpy(&bs->bstype, &opts->bstype, sizeof(opts->bstype));
+
+ /* The metadata is assumed to be at least 1 page */
+ bs->used_md_pages = spdk_bit_array_create(1);
+ bs->used_blobids = spdk_bit_array_create(0);
+
+ pthread_mutex_init(&bs->used_clusters_mutex, NULL);
+
+ spdk_io_device_register(bs, _spdk_bs_channel_create, _spdk_bs_channel_destroy,
+ sizeof(struct spdk_bs_channel), "blobstore");
+ rc = spdk_bs_register_md_thread(bs);
+ if (rc == -1) {
+ spdk_io_device_unregister(bs, NULL);
+ pthread_mutex_destroy(&bs->used_clusters_mutex);
+ spdk_bit_array_free(&bs->used_blobids);
+ spdk_bit_array_free(&bs->used_md_pages);
+ spdk_bit_array_free(&bs->used_clusters);
+ free(bs);
+ /* FIXME: this is a lie but don't know how to get a proper error code here */
+ return -ENOMEM;
+ }
+
+ *_bs = bs;
+ return 0;
+}
+
+/* START spdk_bs_load, spdk_bs_load_ctx will used for both load and unload. */
+
+struct spdk_bs_load_ctx {
+ struct spdk_blob_store *bs;
+ struct spdk_bs_super_block *super;
+
+ struct spdk_bs_md_mask *mask;
+ bool in_page_chain;
+ uint32_t page_index;
+ uint32_t cur_page;
+ struct spdk_blob_md_page *page;
+ bool is_load;
+
+ spdk_bs_sequence_t *seq;
+ spdk_blob_op_with_handle_complete iter_cb_fn;
+ void *iter_cb_arg;
+};
+
+static void
+_spdk_bs_load_ctx_fail(spdk_bs_sequence_t *seq, struct spdk_bs_load_ctx *ctx, int bserrno)
+{
+ assert(bserrno != 0);
+
+ spdk_dma_free(ctx->super);
+ spdk_bs_sequence_finish(seq, bserrno);
+ /*
+ * Only free the blobstore when a load fails. If an unload fails (for some reason)
+ * we want to keep the blobstore in case the caller wants to try again.
+ */
+ if (ctx->is_load) {
+ _spdk_bs_free(ctx->bs);
+ }
+ free(ctx);
+}
+
+static void
+_spdk_bs_set_mask(struct spdk_bit_array *array, struct spdk_bs_md_mask *mask)
+{
+ uint32_t i = 0;
+
+ while (true) {
+ i = spdk_bit_array_find_first_set(array, i);
+ if (i >= mask->length) {
+ break;
+ }
+ mask->mask[i / 8] |= 1U << (i % 8);
+ i++;
+ }
+}
+
+static int
+_spdk_bs_load_mask(struct spdk_bit_array **array_ptr, struct spdk_bs_md_mask *mask)
+{
+ struct spdk_bit_array *array;
+ uint32_t i;
+
+ if (spdk_bit_array_resize(array_ptr, mask->length) < 0) {
+ return -ENOMEM;
+ }
+
+ array = *array_ptr;
+ for (i = 0; i < mask->length; i++) {
+ if (mask->mask[i / 8] & (1U << (i % 8))) {
+ spdk_bit_array_set(array, i);
+ }
+ }
+
+ return 0;
+}
+
+static void
+_spdk_bs_write_super(spdk_bs_sequence_t *seq, struct spdk_blob_store *bs,
+ struct spdk_bs_super_block *super, spdk_bs_sequence_cpl cb_fn, void *cb_arg)
+{
+ /* Update the values in the super block */
+ super->super_blob = bs->super_blob;
+ memcpy(&super->bstype, &bs->bstype, sizeof(bs->bstype));
+ super->crc = _spdk_blob_md_page_calc_crc(super);
+ spdk_bs_sequence_write_dev(seq, super, _spdk_bs_page_to_lba(bs, 0),
+ _spdk_bs_byte_to_lba(bs, sizeof(*super)),
+ cb_fn, cb_arg);
+}
+
+static void
+_spdk_bs_write_used_clusters(spdk_bs_sequence_t *seq, void *arg, spdk_bs_sequence_cpl cb_fn)
+{
+ struct spdk_bs_load_ctx *ctx = arg;
+ uint64_t mask_size, lba, lba_count;
+
+ /* Write out the used clusters mask */
+ mask_size = ctx->super->used_cluster_mask_len * SPDK_BS_PAGE_SIZE;
+ ctx->mask = spdk_dma_zmalloc(mask_size, 0x1000, NULL);
+ if (!ctx->mask) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+
+ ctx->mask->type = SPDK_MD_MASK_TYPE_USED_CLUSTERS;
+ ctx->mask->length = ctx->bs->total_clusters;
+ assert(ctx->mask->length == spdk_bit_array_capacity(ctx->bs->used_clusters));
+
+ _spdk_bs_set_mask(ctx->bs->used_clusters, ctx->mask);
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_start);
+ lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_len);
+ spdk_bs_sequence_write_dev(seq, ctx->mask, lba, lba_count, cb_fn, arg);
+}
+
+static void
+_spdk_bs_write_used_md(spdk_bs_sequence_t *seq, void *arg, spdk_bs_sequence_cpl cb_fn)
+{
+ struct spdk_bs_load_ctx *ctx = arg;
+ uint64_t mask_size, lba, lba_count;
+
+ mask_size = ctx->super->used_page_mask_len * SPDK_BS_PAGE_SIZE;
+ ctx->mask = spdk_dma_zmalloc(mask_size, 0x1000, NULL);
+ if (!ctx->mask) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+
+ ctx->mask->type = SPDK_MD_MASK_TYPE_USED_PAGES;
+ ctx->mask->length = ctx->super->md_len;
+ assert(ctx->mask->length == spdk_bit_array_capacity(ctx->bs->used_md_pages));
+
+ _spdk_bs_set_mask(ctx->bs->used_md_pages, ctx->mask);
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_start);
+ lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_len);
+ spdk_bs_sequence_write_dev(seq, ctx->mask, lba, lba_count, cb_fn, arg);
+}
+
+static void
+_spdk_bs_write_used_blobids(spdk_bs_sequence_t *seq, void *arg, spdk_bs_sequence_cpl cb_fn)
+{
+ struct spdk_bs_load_ctx *ctx = arg;
+ uint64_t mask_size, lba, lba_count;
+
+ if (ctx->super->used_blobid_mask_len == 0) {
+ /*
+ * This is a pre-v3 on-disk format where the blobid mask does not get
+ * written to disk.
+ */
+ cb_fn(seq, arg, 0);
+ return;
+ }
+
+ mask_size = ctx->super->used_blobid_mask_len * SPDK_BS_PAGE_SIZE;
+ ctx->mask = spdk_dma_zmalloc(mask_size, 0x1000, NULL);
+ if (!ctx->mask) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+
+ ctx->mask->type = SPDK_MD_MASK_TYPE_USED_BLOBIDS;
+ ctx->mask->length = ctx->super->md_len;
+ assert(ctx->mask->length == spdk_bit_array_capacity(ctx->bs->used_blobids));
+
+ _spdk_bs_set_mask(ctx->bs->used_blobids, ctx->mask);
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_blobid_mask_start);
+ lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_blobid_mask_len);
+ spdk_bs_sequence_write_dev(seq, ctx->mask, lba, lba_count, cb_fn, arg);
+}
+
+static void
+_spdk_bs_load_iter(void *arg, struct spdk_blob *blob, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = arg;
+
+ if (bserrno == 0) {
+ if (ctx->iter_cb_fn) {
+ ctx->iter_cb_fn(ctx->iter_cb_arg, blob, 0);
+ }
+ _spdk_bs_blob_list_add(blob);
+ spdk_bs_iter_next(ctx->bs, blob, _spdk_bs_load_iter, ctx);
+ return;
+ }
+
+ if (bserrno == -ENOENT) {
+ bserrno = 0;
+ } else {
+ /*
+ * This case needs to be looked at further. Same problem
+ * exists with applications that rely on explicit blob
+ * iteration. We should just skip the blob that failed
+ * to load and continue on to the next one.
+ */
+ SPDK_ERRLOG("Error in iterating blobs\n");
+ }
+
+ ctx->iter_cb_fn = NULL;
+
+ spdk_dma_free(ctx->super);
+ spdk_dma_free(ctx->mask);
+ spdk_bs_sequence_finish(ctx->seq, bserrno);
+ free(ctx);
+}
+
+static void
+_spdk_bs_load_complete(spdk_bs_sequence_t *seq, struct spdk_bs_load_ctx *ctx, int bserrno)
+{
+ ctx->seq = seq;
+ spdk_bs_iter_first(ctx->bs, _spdk_bs_load_iter, ctx);
+}
+
+static void
+_spdk_bs_load_used_blobids_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ int rc;
+
+ /* The type must be correct */
+ assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_BLOBIDS);
+
+ /* The length of the mask (in bits) must not be greater than
+ * the length of the buffer (converted to bits) */
+ assert(ctx->mask->length <= (ctx->super->used_blobid_mask_len * SPDK_BS_PAGE_SIZE * 8));
+
+ /* The length of the mask must be exactly equal to the size
+ * (in pages) of the metadata region */
+ assert(ctx->mask->length == ctx->super->md_len);
+
+ rc = _spdk_bs_load_mask(&ctx->bs->used_blobids, ctx->mask);
+ if (rc < 0) {
+ spdk_dma_free(ctx->mask);
+ _spdk_bs_load_ctx_fail(seq, ctx, rc);
+ return;
+ }
+
+ _spdk_bs_load_complete(seq, ctx, bserrno);
+}
+
+static void
+_spdk_bs_load_used_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ uint64_t lba, lba_count, mask_size;
+ int rc;
+
+ /* The type must be correct */
+ assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_CLUSTERS);
+ /* The length of the mask (in bits) must not be greater than the length of the buffer (converted to bits) */
+ assert(ctx->mask->length <= (ctx->super->used_cluster_mask_len * sizeof(
+ struct spdk_blob_md_page) * 8));
+ /* The length of the mask must be exactly equal to the total number of clusters */
+ assert(ctx->mask->length == ctx->bs->total_clusters);
+
+ rc = _spdk_bs_load_mask(&ctx->bs->used_clusters, ctx->mask);
+ if (rc < 0) {
+ spdk_dma_free(ctx->mask);
+ _spdk_bs_load_ctx_fail(seq, ctx, rc);
+ return;
+ }
+
+ ctx->bs->num_free_clusters = spdk_bit_array_count_clear(ctx->bs->used_clusters);
+ assert(ctx->bs->num_free_clusters <= ctx->bs->total_clusters);
+
+ spdk_dma_free(ctx->mask);
+
+ /* Read the used blobids mask */
+ mask_size = ctx->super->used_blobid_mask_len * SPDK_BS_PAGE_SIZE;
+ ctx->mask = spdk_dma_zmalloc(mask_size, 0x1000, NULL);
+ if (!ctx->mask) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_blobid_mask_start);
+ lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_blobid_mask_len);
+ spdk_bs_sequence_read_dev(seq, ctx->mask, lba, lba_count,
+ _spdk_bs_load_used_blobids_cpl, ctx);
+}
+
+static void
+_spdk_bs_load_used_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ uint64_t lba, lba_count, mask_size;
+ int rc;
+
+ /* The type must be correct */
+ assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_PAGES);
+ /* The length of the mask (in bits) must not be greater than the length of the buffer (converted to bits) */
+ assert(ctx->mask->length <= (ctx->super->used_page_mask_len * SPDK_BS_PAGE_SIZE *
+ 8));
+ /* The length of the mask must be exactly equal to the size (in pages) of the metadata region */
+ assert(ctx->mask->length == ctx->super->md_len);
+
+ rc = _spdk_bs_load_mask(&ctx->bs->used_md_pages, ctx->mask);
+ if (rc < 0) {
+ spdk_dma_free(ctx->mask);
+ _spdk_bs_load_ctx_fail(seq, ctx, rc);
+ return;
+ }
+
+ spdk_dma_free(ctx->mask);
+
+ /* Read the used clusters mask */
+ mask_size = ctx->super->used_cluster_mask_len * SPDK_BS_PAGE_SIZE;
+ ctx->mask = spdk_dma_zmalloc(mask_size, 0x1000, NULL);
+ if (!ctx->mask) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_start);
+ lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_len);
+ spdk_bs_sequence_read_dev(seq, ctx->mask, lba, lba_count,
+ _spdk_bs_load_used_clusters_cpl, ctx);
+}
+
+static void
+_spdk_bs_load_read_used_pages(spdk_bs_sequence_t *seq, void *cb_arg)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ uint64_t lba, lba_count, mask_size;
+
+ /* Read the used pages mask */
+ mask_size = ctx->super->used_page_mask_len * SPDK_BS_PAGE_SIZE;
+ ctx->mask = spdk_dma_zmalloc(mask_size, 0x1000, NULL);
+ if (!ctx->mask) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_start);
+ lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_len);
+ spdk_bs_sequence_read_dev(seq, ctx->mask, lba, lba_count,
+ _spdk_bs_load_used_pages_cpl, ctx);
+}
+
+static int
+_spdk_bs_load_replay_md_parse_page(const struct spdk_blob_md_page *page, struct spdk_blob_store *bs)
+{
+ struct spdk_blob_md_descriptor *desc;
+ size_t cur_desc = 0;
+
+ desc = (struct spdk_blob_md_descriptor *)page->descriptors;
+ while (cur_desc < sizeof(page->descriptors)) {
+ if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_PADDING) {
+ if (desc->length == 0) {
+ /* If padding and length are 0, this terminates the page */
+ break;
+ }
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_EXTENT) {
+ struct spdk_blob_md_descriptor_extent *desc_extent;
+ unsigned int i, j;
+ unsigned int cluster_count = 0;
+ uint32_t cluster_idx;
+
+ desc_extent = (struct spdk_blob_md_descriptor_extent *)desc;
+
+ for (i = 0; i < desc_extent->length / sizeof(desc_extent->extents[0]); i++) {
+ for (j = 0; j < desc_extent->extents[i].length; j++) {
+ cluster_idx = desc_extent->extents[i].cluster_idx;
+ /*
+ * cluster_idx = 0 means an unallocated cluster - don't mark that
+ * in the used cluster map.
+ */
+ if (cluster_idx != 0) {
+ spdk_bit_array_set(bs->used_clusters, cluster_idx + j);
+ if (bs->num_free_clusters == 0) {
+ return -ENOSPC;
+ }
+ bs->num_free_clusters--;
+ }
+ cluster_count++;
+ }
+ }
+ if (cluster_count == 0) {
+ return -EINVAL;
+ }
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR) {
+ /* Skip this item */
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL) {
+ /* Skip this item */
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_FLAGS) {
+ /* Skip this item */
+ } else {
+ /* Error */
+ return -EINVAL;
+ }
+ /* Advance to the next descriptor */
+ cur_desc += sizeof(*desc) + desc->length;
+ if (cur_desc + sizeof(*desc) > sizeof(page->descriptors)) {
+ break;
+ }
+ desc = (struct spdk_blob_md_descriptor *)((uintptr_t)page->descriptors + cur_desc);
+ }
+ return 0;
+}
+
+static bool _spdk_bs_load_cur_md_page_valid(struct spdk_bs_load_ctx *ctx)
+{
+ uint32_t crc;
+
+ crc = _spdk_blob_md_page_calc_crc(ctx->page);
+ if (crc != ctx->page->crc) {
+ return false;
+ }
+
+ if (_spdk_bs_page_to_blobid(ctx->cur_page) != ctx->page->id) {
+ return false;
+ }
+ return true;
+}
+
+static void
+_spdk_bs_load_replay_cur_md_page(spdk_bs_sequence_t *seq, void *cb_arg);
+
+static void
+_spdk_bs_load_write_used_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ _spdk_bs_load_complete(seq, ctx, bserrno);
+}
+
+static void
+_spdk_bs_load_write_used_blobids_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ spdk_dma_free(ctx->mask);
+ ctx->mask = NULL;
+
+ _spdk_bs_write_used_clusters(seq, cb_arg, _spdk_bs_load_write_used_clusters_cpl);
+}
+
+static void
+_spdk_bs_load_write_used_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ spdk_dma_free(ctx->mask);
+ ctx->mask = NULL;
+
+ _spdk_bs_write_used_blobids(seq, cb_arg, _spdk_bs_load_write_used_blobids_cpl);
+}
+
+static void
+_spdk_bs_load_write_used_md(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ _spdk_bs_write_used_md(seq, cb_arg, _spdk_bs_load_write_used_pages_cpl);
+}
+
+static void
+_spdk_bs_load_replay_md_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ uint64_t num_md_clusters;
+ uint64_t i;
+ uint32_t page_num;
+
+ if (bserrno != 0) {
+ _spdk_bs_load_ctx_fail(seq, ctx, bserrno);
+ return;
+ }
+
+ page_num = ctx->cur_page;
+ if (_spdk_bs_load_cur_md_page_valid(ctx) == true) {
+ if (ctx->page->sequence_num == 0 || ctx->in_page_chain == true) {
+ spdk_bit_array_set(ctx->bs->used_md_pages, page_num);
+ if (ctx->page->sequence_num == 0) {
+ spdk_bit_array_set(ctx->bs->used_blobids, page_num);
+ }
+ if (_spdk_bs_load_replay_md_parse_page(ctx->page, ctx->bs)) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
+ return;
+ }
+ if (ctx->page->next != SPDK_INVALID_MD_PAGE) {
+ ctx->in_page_chain = true;
+ ctx->cur_page = ctx->page->next;
+ _spdk_bs_load_replay_cur_md_page(seq, cb_arg);
+ return;
+ }
+ }
+ }
+
+ ctx->in_page_chain = false;
+
+ do {
+ ctx->page_index++;
+ } while (spdk_bit_array_get(ctx->bs->used_md_pages, ctx->page_index) == true);
+
+ if (ctx->page_index < ctx->super->md_len) {
+ ctx->cur_page = ctx->page_index;
+ _spdk_bs_load_replay_cur_md_page(seq, cb_arg);
+ } else {
+ /* Claim all of the clusters used by the metadata */
+ num_md_clusters = divide_round_up(ctx->super->md_len, ctx->bs->pages_per_cluster);
+ for (i = 0; i < num_md_clusters; i++) {
+ _spdk_bs_claim_cluster(ctx->bs, i);
+ }
+ spdk_dma_free(ctx->page);
+ _spdk_bs_load_write_used_md(seq, ctx, bserrno);
+ }
+}
+
+static void
+_spdk_bs_load_replay_cur_md_page(spdk_bs_sequence_t *seq, void *cb_arg)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ uint64_t lba;
+
+ assert(ctx->cur_page < ctx->super->md_len);
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->md_start + ctx->cur_page);
+ spdk_bs_sequence_read_dev(seq, ctx->page, lba,
+ _spdk_bs_byte_to_lba(ctx->bs, SPDK_BS_PAGE_SIZE),
+ _spdk_bs_load_replay_md_cpl, ctx);
+}
+
+static void
+_spdk_bs_load_replay_md(spdk_bs_sequence_t *seq, void *cb_arg)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ ctx->page_index = 0;
+ ctx->cur_page = 0;
+ ctx->page = spdk_dma_zmalloc(SPDK_BS_PAGE_SIZE,
+ SPDK_BS_PAGE_SIZE,
+ NULL);
+ if (!ctx->page) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+ _spdk_bs_load_replay_cur_md_page(seq, cb_arg);
+}
+
+static void
+_spdk_bs_recover(spdk_bs_sequence_t *seq, void *cb_arg)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ int rc;
+
+ rc = spdk_bit_array_resize(&ctx->bs->used_md_pages, ctx->super->md_len);
+ if (rc < 0) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+
+ rc = spdk_bit_array_resize(&ctx->bs->used_blobids, ctx->super->md_len);
+ if (rc < 0) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+
+ rc = spdk_bit_array_resize(&ctx->bs->used_clusters, ctx->bs->total_clusters);
+ if (rc < 0) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+
+ ctx->bs->num_free_clusters = ctx->bs->total_clusters;
+ _spdk_bs_load_replay_md(seq, cb_arg);
+}
+
+static void
+_spdk_bs_load_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+ uint32_t crc;
+ int rc;
+ static const char zeros[SPDK_BLOBSTORE_TYPE_LENGTH];
+
+ if (ctx->super->version > SPDK_BS_VERSION ||
+ ctx->super->version < SPDK_BS_INITIAL_VERSION) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
+ return;
+ }
+
+ if (memcmp(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
+ sizeof(ctx->super->signature)) != 0) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
+ return;
+ }
+
+ crc = _spdk_blob_md_page_calc_crc(ctx->super);
+ if (crc != ctx->super->crc) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
+ return;
+ }
+
+ if (memcmp(&ctx->bs->bstype, &ctx->super->bstype, SPDK_BLOBSTORE_TYPE_LENGTH) == 0) {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Bstype matched - loading blobstore\n");
+ } else if (memcmp(&ctx->bs->bstype, zeros, SPDK_BLOBSTORE_TYPE_LENGTH) == 0) {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Bstype wildcard used - loading blobstore regardless bstype\n");
+ } else {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Unexpected bstype\n");
+ SPDK_TRACEDUMP(SPDK_LOG_BLOB, "Expected:", ctx->bs->bstype.bstype, SPDK_BLOBSTORE_TYPE_LENGTH);
+ SPDK_TRACEDUMP(SPDK_LOG_BLOB, "Found:", ctx->super->bstype.bstype, SPDK_BLOBSTORE_TYPE_LENGTH);
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENXIO);
+ return;
+ }
+
+ if (ctx->super->size > ctx->bs->dev->blockcnt * ctx->bs->dev->blocklen) {
+ SPDK_NOTICELOG("Size mismatch, dev size: %lu, blobstore size: %lu\n",
+ ctx->bs->dev->blockcnt * ctx->bs->dev->blocklen, ctx->super->size);
+ _spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
+ return;
+ }
+
+ if (ctx->super->size == 0) {
+ ctx->super->size = ctx->bs->dev->blockcnt * ctx->bs->dev->blocklen;
+ }
+
+ if (ctx->super->io_unit_size == 0) {
+ ctx->super->io_unit_size = SPDK_BS_PAGE_SIZE;
+ }
+
+ /* Parse the super block */
+ ctx->bs->clean = 1;
+ ctx->bs->cluster_sz = ctx->super->cluster_size;
+ ctx->bs->total_clusters = ctx->super->size / ctx->super->cluster_size;
+ ctx->bs->pages_per_cluster = ctx->bs->cluster_sz / SPDK_BS_PAGE_SIZE;
+ ctx->bs->io_unit_size = ctx->super->io_unit_size;
+ rc = spdk_bit_array_resize(&ctx->bs->used_clusters, ctx->bs->total_clusters);
+ if (rc < 0) {
+ _spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
+ return;
+ }
+ ctx->bs->md_start = ctx->super->md_start;
+ ctx->bs->md_len = ctx->super->md_len;
+ ctx->bs->total_data_clusters = ctx->bs->total_clusters - divide_round_up(
+ ctx->bs->md_start + ctx->bs->md_len, ctx->bs->pages_per_cluster);
+ ctx->bs->super_blob = ctx->super->super_blob;
+ memcpy(&ctx->bs->bstype, &ctx->super->bstype, sizeof(ctx->super->bstype));
+
+ if (ctx->super->used_blobid_mask_len == 0 || ctx->super->clean == 0) {
+ _spdk_bs_recover(seq, ctx);
+ } else {
+ _spdk_bs_load_read_used_pages(seq, ctx);
+ }
+}
+
+void
+spdk_bs_load(struct spdk_bs_dev *dev, struct spdk_bs_opts *o,
+ spdk_bs_op_with_handle_complete cb_fn, void *cb_arg)
+{
+ struct spdk_blob_store *bs;
+ struct spdk_bs_cpl cpl;
+ spdk_bs_sequence_t *seq;
+ struct spdk_bs_load_ctx *ctx;
+ struct spdk_bs_opts opts = {};
+ int err;
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Loading blobstore from dev %p\n", dev);
+
+ if ((SPDK_BS_PAGE_SIZE % dev->blocklen) != 0) {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "unsupported dev block length of %d\n", dev->blocklen);
+ dev->destroy(dev);
+ cb_fn(cb_arg, NULL, -EINVAL);
+ return;
+ }
+
+ if (o) {
+ opts = *o;
+ } else {
+ spdk_bs_opts_init(&opts);
+ }
+
+ if (opts.max_md_ops == 0 || opts.max_channel_ops == 0) {
+ dev->destroy(dev);
+ cb_fn(cb_arg, NULL, -EINVAL);
+ return;
+ }
+
+ err = _spdk_bs_alloc(dev, &opts, &bs);
+ if (err) {
+ dev->destroy(dev);
+ cb_fn(cb_arg, NULL, err);
+ return;
+ }
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+
+ ctx->bs = bs;
+ ctx->is_load = true;
+ ctx->iter_cb_fn = opts.iter_cb_fn;
+ ctx->iter_cb_arg = opts.iter_cb_arg;
+
+ /* Allocate memory for the super block */
+ ctx->super = spdk_dma_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
+ if (!ctx->super) {
+ free(ctx);
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+
+ cpl.type = SPDK_BS_CPL_TYPE_BS_HANDLE;
+ cpl.u.bs_handle.cb_fn = cb_fn;
+ cpl.u.bs_handle.cb_arg = cb_arg;
+ cpl.u.bs_handle.bs = bs;
+
+ seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
+ if (!seq) {
+ spdk_dma_free(ctx->super);
+ free(ctx);
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+
+ /* Read the super block */
+ spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
+ _spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
+ _spdk_bs_load_super_cpl, ctx);
+}
+
+/* END spdk_bs_load */
+
+/* START spdk_bs_dump */
+
+struct spdk_bs_dump_ctx {
+ struct spdk_blob_store *bs;
+ struct spdk_bs_super_block *super;
+ uint32_t cur_page;
+ struct spdk_blob_md_page *page;
+ spdk_bs_sequence_t *seq;
+ FILE *fp;
+ spdk_bs_dump_print_xattr print_xattr_fn;
+ char xattr_name[4096];
+};
+
+static void
+_spdk_bs_dump_finish(spdk_bs_sequence_t *seq, struct spdk_bs_dump_ctx *ctx, int bserrno)
+{
+ spdk_dma_free(ctx->super);
+
+ /*
+ * We need to defer calling spdk_bs_call_cpl() until after
+ * dev destruction, so tuck these away for later use.
+ */
+ ctx->bs->unload_err = bserrno;
+ memcpy(&ctx->bs->unload_cpl, &seq->cpl, sizeof(struct spdk_bs_cpl));
+ seq->cpl.type = SPDK_BS_CPL_TYPE_NONE;
+
+ spdk_bs_sequence_finish(seq, 0);
+ _spdk_bs_free(ctx->bs);
+ free(ctx);
+}
+
+static void _spdk_bs_dump_read_md_page(spdk_bs_sequence_t *seq, void *cb_arg);
+
+static void
+_spdk_bs_dump_print_md_page(struct spdk_bs_dump_ctx *ctx)
+{
+ uint32_t page_idx = ctx->cur_page;
+ struct spdk_blob_md_page *page = ctx->page;
+ struct spdk_blob_md_descriptor *desc;
+ size_t cur_desc = 0;
+ uint32_t crc;
+
+ fprintf(ctx->fp, "=========\n");
+ fprintf(ctx->fp, "Metadata Page Index: %" PRIu32 " (0x%" PRIx32 ")\n", page_idx, page_idx);
+ fprintf(ctx->fp, "Blob ID: 0x%" PRIx64 "\n", page->id);
+
+ crc = _spdk_blob_md_page_calc_crc(page);
+ fprintf(ctx->fp, "CRC: 0x%" PRIx32 " (%s)\n", page->crc, crc == page->crc ? "OK" : "Mismatch");
+
+ desc = (struct spdk_blob_md_descriptor *)page->descriptors;
+ while (cur_desc < sizeof(page->descriptors)) {
+ if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_PADDING) {
+ if (desc->length == 0) {
+ /* If padding and length are 0, this terminates the page */
+ break;
+ }
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_EXTENT) {
+ struct spdk_blob_md_descriptor_extent *desc_extent;
+ unsigned int i;
+
+ desc_extent = (struct spdk_blob_md_descriptor_extent *)desc;
+
+ for (i = 0; i < desc_extent->length / sizeof(desc_extent->extents[0]); i++) {
+ if (desc_extent->extents[i].cluster_idx != 0) {
+ fprintf(ctx->fp, "Allocated Extent - Start: %" PRIu32,
+ desc_extent->extents[i].cluster_idx);
+ } else {
+ fprintf(ctx->fp, "Unallocated Extent - ");
+ }
+ fprintf(ctx->fp, " Length: %" PRIu32, desc_extent->extents[i].length);
+ fprintf(ctx->fp, "\n");
+ }
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR) {
+ struct spdk_blob_md_descriptor_xattr *desc_xattr;
+ uint32_t i;
+
+ desc_xattr = (struct spdk_blob_md_descriptor_xattr *)desc;
+
+ if (desc_xattr->length !=
+ sizeof(desc_xattr->name_length) + sizeof(desc_xattr->value_length) +
+ desc_xattr->name_length + desc_xattr->value_length) {
+ }
+
+ memcpy(ctx->xattr_name, desc_xattr->name, desc_xattr->name_length);
+ ctx->xattr_name[desc_xattr->name_length] = '\0';
+ fprintf(ctx->fp, "XATTR: name = \"%s\"\n", ctx->xattr_name);
+ fprintf(ctx->fp, " value = \"");
+ ctx->print_xattr_fn(ctx->fp, ctx->super->bstype.bstype, ctx->xattr_name,
+ (void *)((uintptr_t)desc_xattr->name + desc_xattr->name_length),
+ desc_xattr->value_length);
+ fprintf(ctx->fp, "\"\n");
+ for (i = 0; i < desc_xattr->value_length; i++) {
+ if (i % 16 == 0) {
+ fprintf(ctx->fp, " ");
+ }
+ fprintf(ctx->fp, "%02" PRIx8 " ", *((uint8_t *)desc_xattr->name + desc_xattr->name_length + i));
+ if ((i + 1) % 16 == 0) {
+ fprintf(ctx->fp, "\n");
+ }
+ }
+ if (i % 16 != 0) {
+ fprintf(ctx->fp, "\n");
+ }
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL) {
+ /* TODO */
+ } else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_FLAGS) {
+ /* TODO */
+ } else {
+ /* Error */
+ }
+ /* Advance to the next descriptor */
+ cur_desc += sizeof(*desc) + desc->length;
+ if (cur_desc + sizeof(*desc) > sizeof(page->descriptors)) {
+ break;
+ }
+ desc = (struct spdk_blob_md_descriptor *)((uintptr_t)page->descriptors + cur_desc);
+ }
+}
+
+static void
+_spdk_bs_dump_read_md_page_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_dump_ctx *ctx = cb_arg;
+
+ if (bserrno != 0) {
+ _spdk_bs_dump_finish(seq, ctx, bserrno);
+ return;
+ }
+
+ if (ctx->page->id != 0) {
+ _spdk_bs_dump_print_md_page(ctx);
+ }
+
+ ctx->cur_page++;
+
+ if (ctx->cur_page < ctx->super->md_len) {
+ _spdk_bs_dump_read_md_page(seq, cb_arg);
+ } else {
+ spdk_dma_free(ctx->page);
+ _spdk_bs_dump_finish(seq, ctx, 0);
+ }
+}
+
+static void
+_spdk_bs_dump_read_md_page(spdk_bs_sequence_t *seq, void *cb_arg)
+{
+ struct spdk_bs_dump_ctx *ctx = cb_arg;
+ uint64_t lba;
+
+ assert(ctx->cur_page < ctx->super->md_len);
+ lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->md_start + ctx->cur_page);
+ spdk_bs_sequence_read_dev(seq, ctx->page, lba,
+ _spdk_bs_byte_to_lba(ctx->bs, SPDK_BS_PAGE_SIZE),
+ _spdk_bs_dump_read_md_page_cpl, ctx);
+}
+
+static void
+_spdk_bs_dump_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_dump_ctx *ctx = cb_arg;
+
+ fprintf(ctx->fp, "Signature: \"%.8s\" ", ctx->super->signature);
+ if (memcmp(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
+ sizeof(ctx->super->signature)) != 0) {
+ fprintf(ctx->fp, "(Mismatch)\n");
+ _spdk_bs_dump_finish(seq, ctx, bserrno);
+ return;
+ } else {
+ fprintf(ctx->fp, "(OK)\n");
+ }
+ fprintf(ctx->fp, "Version: %" PRIu32 "\n", ctx->super->version);
+ fprintf(ctx->fp, "CRC: 0x%x (%s)\n", ctx->super->crc,
+ (ctx->super->crc == _spdk_blob_md_page_calc_crc(ctx->super)) ? "OK" : "Mismatch");
+ fprintf(ctx->fp, "Blobstore Type: %.*s\n", SPDK_BLOBSTORE_TYPE_LENGTH, ctx->super->bstype.bstype);
+ fprintf(ctx->fp, "Cluster Size: %" PRIu32 "\n", ctx->super->cluster_size);
+ fprintf(ctx->fp, "Super Blob ID: ");
+ if (ctx->super->super_blob == SPDK_BLOBID_INVALID) {
+ fprintf(ctx->fp, "(None)\n");
+ } else {
+ fprintf(ctx->fp, "%" PRIu64 "\n", ctx->super->super_blob);
+ }
+ fprintf(ctx->fp, "Clean: %" PRIu32 "\n", ctx->super->clean);
+ fprintf(ctx->fp, "Used Metadata Page Mask Start: %" PRIu32 "\n", ctx->super->used_page_mask_start);
+ fprintf(ctx->fp, "Used Metadata Page Mask Length: %" PRIu32 "\n", ctx->super->used_page_mask_len);
+ fprintf(ctx->fp, "Used Cluster Mask Start: %" PRIu32 "\n", ctx->super->used_cluster_mask_start);
+ fprintf(ctx->fp, "Used Cluster Mask Length: %" PRIu32 "\n", ctx->super->used_cluster_mask_len);
+ fprintf(ctx->fp, "Used Blob ID Mask Start: %" PRIu32 "\n", ctx->super->used_blobid_mask_start);
+ fprintf(ctx->fp, "Used Blob ID Mask Length: %" PRIu32 "\n", ctx->super->used_blobid_mask_len);
+ fprintf(ctx->fp, "Metadata Start: %" PRIu32 "\n", ctx->super->md_start);
+ fprintf(ctx->fp, "Metadata Length: %" PRIu32 "\n", ctx->super->md_len);
+
+ ctx->cur_page = 0;
+ ctx->page = spdk_dma_zmalloc(SPDK_BS_PAGE_SIZE,
+ SPDK_BS_PAGE_SIZE,
+ NULL);
+ if (!ctx->page) {
+ _spdk_bs_dump_finish(seq, ctx, -ENOMEM);
+ return;
+ }
+ _spdk_bs_dump_read_md_page(seq, cb_arg);
+}
+
+void
+spdk_bs_dump(struct spdk_bs_dev *dev, FILE *fp, spdk_bs_dump_print_xattr print_xattr_fn,
+ spdk_bs_op_complete cb_fn, void *cb_arg)
+{
+ struct spdk_blob_store *bs;
+ struct spdk_bs_cpl cpl;
+ spdk_bs_sequence_t *seq;
+ struct spdk_bs_dump_ctx *ctx;
+ struct spdk_bs_opts opts = {};
+ int err;
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Dumping blobstore from dev %p\n", dev);
+
+ spdk_bs_opts_init(&opts);
+
+ err = _spdk_bs_alloc(dev, &opts, &bs);
+ if (err) {
+ dev->destroy(dev);
+ cb_fn(cb_arg, err);
+ return;
+ }
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->bs = bs;
+ ctx->fp = fp;
+ ctx->print_xattr_fn = print_xattr_fn;
+
+ /* Allocate memory for the super block */
+ ctx->super = spdk_dma_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
+ if (!ctx->super) {
+ free(ctx);
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
+ cpl.u.bs_basic.cb_fn = cb_fn;
+ cpl.u.bs_basic.cb_arg = cb_arg;
+
+ seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
+ if (!seq) {
+ spdk_dma_free(ctx->super);
+ free(ctx);
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ /* Read the super block */
+ spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
+ _spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
+ _spdk_bs_dump_super_cpl, ctx);
+}
+
+/* END spdk_bs_dump */
+
+/* START spdk_bs_init */
+
+struct spdk_bs_init_ctx {
+ struct spdk_blob_store *bs;
+ struct spdk_bs_super_block *super;
+};
+
+static void
+_spdk_bs_init_persist_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_init_ctx *ctx = cb_arg;
+
+ spdk_dma_free(ctx->super);
+ free(ctx);
+
+ spdk_bs_sequence_finish(seq, bserrno);
+}
+
+static void
+_spdk_bs_init_trim_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_init_ctx *ctx = cb_arg;
+
+ /* Write super block */
+ spdk_bs_sequence_write_dev(seq, ctx->super, _spdk_bs_page_to_lba(ctx->bs, 0),
+ _spdk_bs_byte_to_lba(ctx->bs, sizeof(*ctx->super)),
+ _spdk_bs_init_persist_super_cpl, ctx);
+}
+
+void
+spdk_bs_init(struct spdk_bs_dev *dev, struct spdk_bs_opts *o,
+ spdk_bs_op_with_handle_complete cb_fn, void *cb_arg)
+{
+ struct spdk_bs_init_ctx *ctx;
+ struct spdk_blob_store *bs;
+ struct spdk_bs_cpl cpl;
+ spdk_bs_sequence_t *seq;
+ spdk_bs_batch_t *batch;
+ uint64_t num_md_lba;
+ uint64_t num_md_pages;
+ uint64_t num_md_clusters;
+ uint32_t i;
+ struct spdk_bs_opts opts = {};
+ int rc;
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Initializing blobstore on dev %p\n", dev);
+
+ if ((SPDK_BS_PAGE_SIZE % dev->blocklen) != 0) {
+ SPDK_ERRLOG("unsupported dev block length of %d\n",
+ dev->blocklen);
+ dev->destroy(dev);
+ cb_fn(cb_arg, NULL, -EINVAL);
+ return;
+ }
+
+ if (o) {
+ opts = *o;
+ } else {
+ spdk_bs_opts_init(&opts);
+ }
+
+ if (_spdk_bs_opts_verify(&opts) != 0) {
+ dev->destroy(dev);
+ cb_fn(cb_arg, NULL, -EINVAL);
+ return;
+ }
+
+ rc = _spdk_bs_alloc(dev, &opts, &bs);
+ if (rc) {
+ dev->destroy(dev);
+ cb_fn(cb_arg, NULL, rc);
+ return;
+ }
+
+ if (opts.num_md_pages == SPDK_BLOB_OPTS_NUM_MD_PAGES) {
+ /* By default, allocate 1 page per cluster.
+ * Technically, this over-allocates metadata
+ * because more metadata will reduce the number
+ * of usable clusters. This can be addressed with
+ * more complex math in the future.
+ */
+ bs->md_len = bs->total_clusters;
+ } else {
+ bs->md_len = opts.num_md_pages;
+ }
+ rc = spdk_bit_array_resize(&bs->used_md_pages, bs->md_len);
+ if (rc < 0) {
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+
+ rc = spdk_bit_array_resize(&bs->used_blobids, bs->md_len);
+ if (rc < 0) {
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+
+ ctx->bs = bs;
+
+ /* Allocate memory for the super block */
+ ctx->super = spdk_dma_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
+ if (!ctx->super) {
+ free(ctx);
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+ memcpy(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
+ sizeof(ctx->super->signature));
+ ctx->super->version = SPDK_BS_VERSION;
+ ctx->super->length = sizeof(*ctx->super);
+ ctx->super->super_blob = bs->super_blob;
+ ctx->super->clean = 0;
+ ctx->super->cluster_size = bs->cluster_sz;
+ ctx->super->io_unit_size = bs->io_unit_size;
+ memcpy(&ctx->super->bstype, &bs->bstype, sizeof(bs->bstype));
+
+ /* Calculate how many pages the metadata consumes at the front
+ * of the disk.
+ */
+
+ /* The super block uses 1 page */
+ num_md_pages = 1;
+
+ /* The used_md_pages mask requires 1 bit per metadata page, rounded
+ * up to the nearest page, plus a header.
+ */
+ ctx->super->used_page_mask_start = num_md_pages;
+ ctx->super->used_page_mask_len = divide_round_up(sizeof(struct spdk_bs_md_mask) +
+ divide_round_up(bs->md_len, 8),
+ SPDK_BS_PAGE_SIZE);
+ num_md_pages += ctx->super->used_page_mask_len;
+
+ /* The used_clusters mask requires 1 bit per cluster, rounded
+ * up to the nearest page, plus a header.
+ */
+ ctx->super->used_cluster_mask_start = num_md_pages;
+ ctx->super->used_cluster_mask_len = divide_round_up(sizeof(struct spdk_bs_md_mask) +
+ divide_round_up(bs->total_clusters, 8),
+ SPDK_BS_PAGE_SIZE);
+ num_md_pages += ctx->super->used_cluster_mask_len;
+
+ /* The used_blobids mask requires 1 bit per metadata page, rounded
+ * up to the nearest page, plus a header.
+ */
+ ctx->super->used_blobid_mask_start = num_md_pages;
+ ctx->super->used_blobid_mask_len = divide_round_up(sizeof(struct spdk_bs_md_mask) +
+ divide_round_up(bs->md_len, 8),
+ SPDK_BS_PAGE_SIZE);
+ num_md_pages += ctx->super->used_blobid_mask_len;
+
+ /* The metadata region size was chosen above */
+ ctx->super->md_start = bs->md_start = num_md_pages;
+ ctx->super->md_len = bs->md_len;
+ num_md_pages += bs->md_len;
+
+ num_md_lba = _spdk_bs_page_to_lba(bs, num_md_pages);
+
+ ctx->super->size = dev->blockcnt * dev->blocklen;
+
+ ctx->super->crc = _spdk_blob_md_page_calc_crc(ctx->super);
+
+ num_md_clusters = divide_round_up(num_md_pages, bs->pages_per_cluster);
+ if (num_md_clusters > bs->total_clusters) {
+ SPDK_ERRLOG("Blobstore metadata cannot use more clusters than is available, "
+ "please decrease number of pages reserved for metadata "
+ "or increase cluster size.\n");
+ spdk_dma_free(ctx->super);
+ free(ctx);
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+ /* Claim all of the clusters used by the metadata */
+ for (i = 0; i < num_md_clusters; i++) {
+ _spdk_bs_claim_cluster(bs, i);
+ }
+
+ bs->total_data_clusters = bs->num_free_clusters;
+
+ cpl.type = SPDK_BS_CPL_TYPE_BS_HANDLE;
+ cpl.u.bs_handle.cb_fn = cb_fn;
+ cpl.u.bs_handle.cb_arg = cb_arg;
+ cpl.u.bs_handle.bs = bs;
+
+ seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
+ if (!seq) {
+ spdk_dma_free(ctx->super);
+ free(ctx);
+ _spdk_bs_free(bs);
+ cb_fn(cb_arg, NULL, -ENOMEM);
+ return;
+ }
+
+ batch = spdk_bs_sequence_to_batch(seq, _spdk_bs_init_trim_cpl, ctx);
+
+ /* Clear metadata space */
+ spdk_bs_batch_write_zeroes_dev(batch, 0, num_md_lba);
+ /* Trim data clusters */
+ spdk_bs_batch_unmap_dev(batch, num_md_lba, ctx->bs->dev->blockcnt - num_md_lba);
+
+ spdk_bs_batch_close(batch);
+}
+
+/* END spdk_bs_init */
+
+/* START spdk_bs_destroy */
+
+static void
+_spdk_bs_destroy_trim_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_init_ctx *ctx = cb_arg;
+ struct spdk_blob_store *bs = ctx->bs;
+
+ /*
+ * We need to defer calling spdk_bs_call_cpl() until after
+ * dev destruction, so tuck these away for later use.
+ */
+ bs->unload_err = bserrno;
+ memcpy(&bs->unload_cpl, &seq->cpl, sizeof(struct spdk_bs_cpl));
+ seq->cpl.type = SPDK_BS_CPL_TYPE_NONE;
+
+ spdk_bs_sequence_finish(seq, bserrno);
+
+ _spdk_bs_free(bs);
+ free(ctx);
+}
+
+void
+spdk_bs_destroy(struct spdk_blob_store *bs, spdk_bs_op_complete cb_fn,
+ void *cb_arg)
+{
+ struct spdk_bs_cpl cpl;
+ spdk_bs_sequence_t *seq;
+ struct spdk_bs_init_ctx *ctx;
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Destroying blobstore\n");
+
+ if (!TAILQ_EMPTY(&bs->blobs)) {
+ SPDK_ERRLOG("Blobstore still has open blobs\n");
+ cb_fn(cb_arg, -EBUSY);
+ return;
+ }
+
+ cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
+ cpl.u.bs_basic.cb_fn = cb_fn;
+ cpl.u.bs_basic.cb_arg = cb_arg;
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->bs = bs;
+
+ seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
+ if (!seq) {
+ free(ctx);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ /* Write zeroes to the super block */
+ spdk_bs_sequence_write_zeroes_dev(seq,
+ _spdk_bs_page_to_lba(bs, 0),
+ _spdk_bs_byte_to_lba(bs, sizeof(struct spdk_bs_super_block)),
+ _spdk_bs_destroy_trim_cpl, ctx);
+}
+
+/* END spdk_bs_destroy */
+
+/* START spdk_bs_unload */
+
+static void
+_spdk_bs_unload_write_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ spdk_dma_free(ctx->super);
+
+ /*
+ * We need to defer calling spdk_bs_call_cpl() until after
+ * dev destruction, so tuck these away for later use.
+ */
+ ctx->bs->unload_err = bserrno;
+ memcpy(&ctx->bs->unload_cpl, &seq->cpl, sizeof(struct spdk_bs_cpl));
+ seq->cpl.type = SPDK_BS_CPL_TYPE_NONE;
+
+ spdk_bs_sequence_finish(seq, bserrno);
+
+ _spdk_bs_free(ctx->bs);
+ free(ctx);
+}
+
+static void
+_spdk_bs_unload_write_used_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ spdk_dma_free(ctx->mask);
+ ctx->super->clean = 1;
+
+ _spdk_bs_write_super(seq, ctx->bs, ctx->super, _spdk_bs_unload_write_super_cpl, ctx);
+}
+
+static void
+_spdk_bs_unload_write_used_blobids_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ spdk_dma_free(ctx->mask);
+ ctx->mask = NULL;
+
+ _spdk_bs_write_used_clusters(seq, cb_arg, _spdk_bs_unload_write_used_clusters_cpl);
+}
+
+static void
+_spdk_bs_unload_write_used_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_load_ctx *ctx = cb_arg;
+
+ spdk_dma_free(ctx->mask);
+ ctx->mask = NULL;
+
+ _spdk_bs_write_used_blobids(seq, cb_arg, _spdk_bs_unload_write_used_blobids_cpl);
+}
+
+static void
+_spdk_bs_unload_read_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ _spdk_bs_write_used_md(seq, cb_arg, _spdk_bs_unload_write_used_pages_cpl);
+}
+
+void
+spdk_bs_unload(struct spdk_blob_store *bs, spdk_bs_op_complete cb_fn, void *cb_arg)
+{
+ struct spdk_bs_cpl cpl;
+ spdk_bs_sequence_t *seq;
+ struct spdk_bs_load_ctx *ctx;
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Syncing blobstore\n");
+
+ if (!TAILQ_EMPTY(&bs->blobs)) {
+ SPDK_ERRLOG("Blobstore still has open blobs\n");
+ cb_fn(cb_arg, -EBUSY);
+ return;
+ }
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->bs = bs;
+ ctx->is_load = false;
+
+ ctx->super = spdk_dma_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
+ if (!ctx->super) {
+ free(ctx);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
+ cpl.u.bs_basic.cb_fn = cb_fn;
+ cpl.u.bs_basic.cb_arg = cb_arg;
+
+ seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
+ if (!seq) {
+ spdk_dma_free(ctx->super);
+ free(ctx);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ /* Read super block */
+ spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
+ _spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
+ _spdk_bs_unload_read_super_cpl, ctx);
+}
+
+/* END spdk_bs_unload */
+
+/* START spdk_bs_set_super */
+
+struct spdk_bs_set_super_ctx {
+ struct spdk_blob_store *bs;
+ struct spdk_bs_super_block *super;
+};
+
+static void
+_spdk_bs_set_super_write_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_set_super_ctx *ctx = cb_arg;
+
+ if (bserrno != 0) {
+ SPDK_ERRLOG("Unable to write to super block of blobstore\n");
+ }
+
+ spdk_dma_free(ctx->super);
+
+ spdk_bs_sequence_finish(seq, bserrno);
+
+ free(ctx);
+}
+
+static void
+_spdk_bs_set_super_read_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_bs_set_super_ctx *ctx = cb_arg;
+
+ if (bserrno != 0) {
+ SPDK_ERRLOG("Unable to read super block of blobstore\n");
+ spdk_dma_free(ctx->super);
+ spdk_bs_sequence_finish(seq, bserrno);
+ free(ctx);
+ return;
+ }
+
+ _spdk_bs_write_super(seq, ctx->bs, ctx->super, _spdk_bs_set_super_write_cpl, ctx);
+}
+
+void
+spdk_bs_set_super(struct spdk_blob_store *bs, spdk_blob_id blobid,
+ spdk_bs_op_complete cb_fn, void *cb_arg)
+{
+ struct spdk_bs_cpl cpl;
+ spdk_bs_sequence_t *seq;
+ struct spdk_bs_set_super_ctx *ctx;
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Setting super blob id on blobstore\n");
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->bs = bs;
+
+ ctx->super = spdk_dma_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
+ if (!ctx->super) {
+ free(ctx);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
+ cpl.u.bs_basic.cb_fn = cb_fn;
+ cpl.u.bs_basic.cb_arg = cb_arg;
+
+ seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
+ if (!seq) {
+ spdk_dma_free(ctx->super);
+ free(ctx);
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ bs->super_blob = blobid;
+
+ /* Read super block */
+ spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
+ _spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
+ _spdk_bs_set_super_read_cpl, ctx);
+}
+
+/* END spdk_bs_set_super */
+
+void
+spdk_bs_get_super(struct spdk_blob_store *bs,
+ spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
+{
+ if (bs->super_blob == SPDK_BLOBID_INVALID) {
+ cb_fn(cb_arg, SPDK_BLOBID_INVALID, -ENOENT);
+ } else {
+ cb_fn(cb_arg, bs->super_blob, 0);
+ }
+}
+
+uint64_t
+spdk_bs_get_cluster_size(struct spdk_blob_store *bs)
+{
+ return bs->cluster_sz;
+}
+
+uint64_t
+spdk_bs_get_page_size(struct spdk_blob_store *bs)
+{
+ return SPDK_BS_PAGE_SIZE;
+}
+
+uint64_t
+spdk_bs_get_io_unit_size(struct spdk_blob_store *bs)
+{
+ return bs->io_unit_size;
+}
+
+uint64_t
+spdk_bs_free_cluster_count(struct spdk_blob_store *bs)
+{
+ return bs->num_free_clusters;
+}
+
+uint64_t
+spdk_bs_total_data_cluster_count(struct spdk_blob_store *bs)
+{
+ return bs->total_data_clusters;
+}
+
+static int
+spdk_bs_register_md_thread(struct spdk_blob_store *bs)
+{
+ bs->md_channel = spdk_get_io_channel(bs);
+ if (!bs->md_channel) {
+ SPDK_ERRLOG("Failed to get IO channel.\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+spdk_bs_unregister_md_thread(struct spdk_blob_store *bs)
+{
+ spdk_put_io_channel(bs->md_channel);
+
+ return 0;
+}
+
+spdk_blob_id spdk_blob_get_id(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+
+ return blob->id;
+}
+
+uint64_t spdk_blob_get_num_pages(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+
+ return _spdk_bs_cluster_to_page(blob->bs, blob->active.num_clusters);
+}
+
+uint64_t spdk_blob_get_num_io_units(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+
+ return spdk_blob_get_num_pages(blob) * _spdk_bs_io_unit_per_page(blob->bs);
+}
+
+uint64_t spdk_blob_get_num_clusters(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+
+ return blob->active.num_clusters;
+}
+
+/* START spdk_bs_create_blob */
+
+static void
+_spdk_bs_create_blob_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+{
+ struct spdk_blob *blob = cb_arg;
+
+ _spdk_blob_free(blob);
+
+ spdk_bs_sequence_finish(seq, bserrno);
+}
+
+static int
+_spdk_blob_set_xattrs(struct spdk_blob *blob, const struct spdk_blob_xattr_opts *xattrs,
+ bool internal)
+{
+ uint64_t i;
+ size_t value_len = 0;
+ int rc;
+ const void *value = NULL;
+ if (xattrs->count > 0 && xattrs->get_value == NULL) {
+ return -EINVAL;
+ }
+ for (i = 0; i < xattrs->count; i++) {
+ xattrs->get_value(xattrs->ctx, xattrs->names[i], &value, &value_len);
+ if (value == NULL || value_len == 0) {
+ return -EINVAL;
+ }
+ rc = _spdk_blob_set_xattr(blob, xattrs->names[i], value, value_len, internal);
+ if (rc < 0) {
+ return rc;
}
}
- spdk_free(ctx->mask);
+ return 0;
+}
- /* Read the used clusters mask */
- ctx->mask = spdk_zmalloc(ctx->super->used_cluster_mask_len * sizeof(struct spdk_blob_md_page),
- 0x1000, NULL);
- if (!ctx->mask) {
- spdk_free(ctx->super);
- _spdk_bs_free(ctx->bs);
- free(ctx);
- spdk_bs_sequence_finish(seq, -ENOMEM);
- return;
- }
- lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_start);
- lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_len);
- spdk_bs_sequence_read(seq, ctx->mask, lba, lba_count,
- _spdk_bs_load_used_clusters_cpl, ctx);
+static void
+_spdk_blob_set_thin_provision(struct spdk_blob *blob)
+{
+ _spdk_blob_verify_md_op(blob);
+ blob->invalid_flags |= SPDK_BLOB_THIN_PROV;
+ blob->state = SPDK_BLOB_STATE_DIRTY;
}
static void
-_spdk_bs_load_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_create_blob(struct spdk_blob_store *bs,
+ const struct spdk_blob_opts *opts,
+ const struct spdk_blob_xattr_opts *internal_xattrs,
+ spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
{
- struct spdk_bs_load_ctx *ctx = cb_arg;
- uint64_t lba, lba_count;
+ struct spdk_blob *blob;
+ uint32_t page_idx;
+ struct spdk_bs_cpl cpl;
+ struct spdk_blob_opts opts_default;
+ struct spdk_blob_xattr_opts internal_xattrs_default;
+ spdk_bs_sequence_t *seq;
+ spdk_blob_id id;
+ int rc;
- if (ctx->super->version != SPDK_BS_VERSION) {
- spdk_free(ctx->super);
- _spdk_bs_free(ctx->bs);
- free(ctx);
- spdk_bs_sequence_finish(seq, -EILSEQ);
- return;
- }
+ assert(spdk_get_thread() == bs->md_thread);
- if (memcmp(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
- sizeof(ctx->super->signature)) != 0) {
- spdk_free(ctx->super);
- _spdk_bs_free(ctx->bs);
- free(ctx);
- spdk_bs_sequence_finish(seq, -EILSEQ);
+ page_idx = spdk_bit_array_find_first_clear(bs->used_md_pages, 0);
+ if (page_idx == UINT32_MAX) {
+ cb_fn(cb_arg, 0, -ENOMEM);
return;
}
+ spdk_bit_array_set(bs->used_blobids, page_idx);
+ spdk_bit_array_set(bs->used_md_pages, page_idx);
- if (ctx->super->clean != 1) {
- /* TODO: ONLY CLEAN SHUTDOWN IS CURRENTLY SUPPORTED.
- * All of the necessary data to recover is available
- * on disk - the code just has not been written yet.
- */
- assert(false);
- spdk_free(ctx->super);
- _spdk_bs_free(ctx->bs);
- free(ctx);
- spdk_bs_sequence_finish(seq, -EILSEQ);
- return;
- }
- ctx->super->clean = 0;
+ id = _spdk_bs_page_to_blobid(page_idx);
- /* Parse the super block */
- ctx->bs->cluster_sz = ctx->super->cluster_size;
- ctx->bs->total_clusters = ctx->bs->dev->blockcnt / (ctx->bs->cluster_sz / ctx->bs->dev->blocklen);
- ctx->bs->pages_per_cluster = ctx->bs->cluster_sz / sizeof(struct spdk_blob_md_page);
- ctx->bs->md_start = ctx->super->md_start;
- ctx->bs->md_len = ctx->super->md_len;
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Creating blob with id %lu at page %u\n", id, page_idx);
- /* Read the used pages mask */
- ctx->mask = spdk_zmalloc(ctx->super->used_page_mask_len * sizeof(struct spdk_blob_md_page), 0x1000,
- NULL);
- if (!ctx->mask) {
- spdk_free(ctx->super);
- _spdk_bs_free(ctx->bs);
- free(ctx);
- spdk_bs_sequence_finish(seq, -ENOMEM);
+ blob = _spdk_blob_alloc(bs, id);
+ if (!blob) {
+ cb_fn(cb_arg, 0, -ENOMEM);
return;
}
- lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_start);
- lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_len);
- spdk_bs_sequence_read(seq, ctx->mask, lba, lba_count,
- _spdk_bs_load_used_pages_cpl, ctx);
-}
-
-void
-spdk_bs_load(struct spdk_bs_dev *dev,
- spdk_bs_op_with_handle_complete cb_fn, void *cb_arg)
-{
- struct spdk_blob_store *bs;
- struct spdk_bs_cpl cpl;
- spdk_bs_sequence_t *seq;
- struct spdk_bs_load_ctx *ctx;
- struct spdk_bs_opts opts = {};
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Loading blobstore from dev %p\n", dev);
-
- spdk_bs_opts_init(&opts);
+ if (!opts) {
+ spdk_blob_opts_init(&opts_default);
+ opts = &opts_default;
+ }
+ if (!internal_xattrs) {
+ _spdk_blob_xattrs_init(&internal_xattrs_default);
+ internal_xattrs = &internal_xattrs_default;
+ }
- bs = _spdk_bs_alloc(dev, &opts);
- if (!bs) {
- cb_fn(cb_arg, NULL, -ENOMEM);
+ rc = _spdk_blob_set_xattrs(blob, &opts->xattrs, false);
+ if (rc < 0) {
+ _spdk_blob_free(blob);
+ cb_fn(cb_arg, 0, rc);
return;
}
- ctx = calloc(1, sizeof(*ctx));
- if (!ctx) {
- _spdk_bs_free(bs);
- cb_fn(cb_arg, NULL, -ENOMEM);
+ rc = _spdk_blob_set_xattrs(blob, internal_xattrs, true);
+ if (rc < 0) {
+ _spdk_blob_free(blob);
+ cb_fn(cb_arg, 0, rc);
return;
}
- ctx->bs = bs;
+ if (opts->thin_provision) {
+ _spdk_blob_set_thin_provision(blob);
+ }
- /* Allocate memory for the super block */
- ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
- if (!ctx->super) {
- free(ctx);
- _spdk_bs_free(bs);
+ rc = _spdk_blob_resize(blob, opts->num_clusters);
+ if (rc < 0) {
+ _spdk_blob_free(blob);
+ cb_fn(cb_arg, 0, rc);
return;
}
-
- cpl.type = SPDK_BS_CPL_TYPE_BS_HANDLE;
- cpl.u.bs_handle.cb_fn = cb_fn;
- cpl.u.bs_handle.cb_arg = cb_arg;
- cpl.u.bs_handle.bs = bs;
+ cpl.type = SPDK_BS_CPL_TYPE_BLOBID;
+ cpl.u.blobid.cb_fn = cb_fn;
+ cpl.u.blobid.cb_arg = cb_arg;
+ cpl.u.blobid.blobid = blob->id;
seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
if (!seq) {
- spdk_free(ctx->super);
- free(ctx);
- _spdk_bs_free(bs);
- cb_fn(cb_arg, NULL, -ENOMEM);
+ _spdk_blob_free(blob);
+ cb_fn(cb_arg, 0, -ENOMEM);
return;
}
- /* Read the super block */
- spdk_bs_sequence_read(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
- _spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
- _spdk_bs_load_super_cpl, ctx);
+ _spdk_blob_persist(seq, blob, _spdk_bs_create_blob_cpl, blob);
}
-/* END spdk_bs_load */
+void spdk_bs_create_blob(struct spdk_blob_store *bs,
+ spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
+{
+ _spdk_bs_create_blob(bs, NULL, NULL, cb_fn, cb_arg);
+}
-/* START spdk_bs_init */
+void spdk_bs_create_blob_ext(struct spdk_blob_store *bs, const struct spdk_blob_opts *opts,
+ spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
+{
+ _spdk_bs_create_blob(bs, opts, NULL, cb_fn, cb_arg);
+}
-struct spdk_bs_init_ctx {
- struct spdk_blob_store *bs;
- struct spdk_bs_super_block *super;
+/* END spdk_bs_create_blob */
+
+/* START blob_cleanup */
+
+struct spdk_clone_snapshot_ctx {
+ struct spdk_bs_cpl cpl;
+ int bserrno;
+ bool frozen;
+
+ struct spdk_io_channel *channel;
+
+ /* Current cluster for inflate operation */
+ uint64_t cluster;
+
+ /* For inflation force allocation of all unallocated clusters and remove
+ * thin-provisioning. Otherwise only decouple parent and keep clone thin. */
+ bool allocate_all;
+
+ struct {
+ spdk_blob_id id;
+ struct spdk_blob *blob;
+ } original;
+ struct {
+ spdk_blob_id id;
+ struct spdk_blob *blob;
+ } new;
+
+ /* xattrs specified for snapshot/clones only. They have no impact on
+ * the original blobs xattrs. */
+ const struct spdk_blob_xattr_opts *xattrs;
};
static void
-_spdk_bs_init_persist_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_clone_snapshot_cleanup_finish(void *cb_arg, int bserrno)
{
- struct spdk_bs_init_ctx *ctx = cb_arg;
+ struct spdk_clone_snapshot_ctx *ctx = cb_arg;
+ struct spdk_bs_cpl *cpl = &ctx->cpl;
- spdk_free(ctx->super);
- free(ctx);
+ if (bserrno != 0) {
+ if (ctx->bserrno != 0) {
+ SPDK_ERRLOG("Cleanup error %d\n", bserrno);
+ } else {
+ ctx->bserrno = bserrno;
+ }
+ }
- spdk_bs_sequence_finish(seq, bserrno);
+ switch (cpl->type) {
+ case SPDK_BS_CPL_TYPE_BLOBID:
+ cpl->u.blobid.cb_fn(cpl->u.blobid.cb_arg, cpl->u.blobid.blobid, ctx->bserrno);
+ break;
+ case SPDK_BS_CPL_TYPE_BLOB_BASIC:
+ cpl->u.blob_basic.cb_fn(cpl->u.blob_basic.cb_arg, ctx->bserrno);
+ break;
+ default:
+ SPDK_UNREACHABLE();
+ break;
+ }
+
+ free(ctx);
}
static void
-_spdk_bs_init_trim_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_snapshot_unfreeze_cpl(void *cb_arg, int bserrno)
{
- struct spdk_bs_init_ctx *ctx = cb_arg;
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *origblob = ctx->original.blob;
- /* Write super block */
- spdk_bs_sequence_write(seq, ctx->super, _spdk_bs_page_to_lba(ctx->bs, 0),
- _spdk_bs_byte_to_lba(ctx->bs, sizeof(*ctx->super)),
- _spdk_bs_init_persist_super_cpl, ctx);
+ if (bserrno != 0) {
+ if (ctx->bserrno != 0) {
+ SPDK_ERRLOG("Unfreeze error %d\n", bserrno);
+ } else {
+ ctx->bserrno = bserrno;
+ }
+ }
+
+ ctx->original.id = origblob->id;
+ spdk_blob_close(origblob, _spdk_bs_clone_snapshot_cleanup_finish, ctx);
}
-void
-spdk_bs_init(struct spdk_bs_dev *dev, struct spdk_bs_opts *o,
- spdk_bs_op_with_handle_complete cb_fn, void *cb_arg)
+static void
+_spdk_bs_clone_snapshot_origblob_cleanup(void *cb_arg, int bserrno)
{
- struct spdk_bs_init_ctx *ctx;
- struct spdk_blob_store *bs;
- struct spdk_bs_cpl cpl;
- spdk_bs_sequence_t *seq;
- uint64_t num_md_pages;
- uint32_t i;
- struct spdk_bs_opts opts = {};
- int rc;
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *origblob = ctx->original.blob;
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Initializing blobstore on dev %p\n", dev);
+ if (bserrno != 0) {
+ if (ctx->bserrno != 0) {
+ SPDK_ERRLOG("Cleanup error %d\n", bserrno);
+ } else {
+ ctx->bserrno = bserrno;
+ }
+ }
- if (o) {
- opts = *o;
+ if (ctx->frozen) {
+ /* Unfreeze any outstanding I/O */
+ _spdk_blob_unfreeze_io(origblob, _spdk_bs_snapshot_unfreeze_cpl, ctx);
} else {
- spdk_bs_opts_init(&opts);
+ _spdk_bs_snapshot_unfreeze_cpl(ctx, 0);
}
- bs = _spdk_bs_alloc(dev, &opts);
- if (!bs) {
- cb_fn(cb_arg, NULL, -ENOMEM);
- return;
- }
+}
- if (opts.num_md_pages == UINT32_MAX) {
- /* By default, allocate 1 page per cluster.
- * Technically, this over-allocates metadata
- * because more metadata will reduce the number
- * of usable clusters. This can be addressed with
- * more complex math in the future.
- */
- bs->md_len = bs->total_clusters;
- } else {
- bs->md_len = opts.num_md_pages;
- }
+static void
+_spdk_bs_clone_snapshot_newblob_cleanup(void *cb_arg, int bserrno)
+{
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *newblob = ctx->new.blob;
- rc = spdk_bit_array_resize(&bs->used_md_pages, bs->md_len);
- if (rc < 0) {
- _spdk_bs_free(bs);
- cb_fn(cb_arg, NULL, -ENOMEM);
- return;
+ if (bserrno != 0) {
+ if (ctx->bserrno != 0) {
+ SPDK_ERRLOG("Cleanup error %d\n", bserrno);
+ } else {
+ ctx->bserrno = bserrno;
+ }
}
- ctx = calloc(1, sizeof(*ctx));
- if (!ctx) {
- _spdk_bs_free(bs);
- cb_fn(cb_arg, NULL, -ENOMEM);
+ ctx->new.id = newblob->id;
+ spdk_blob_close(newblob, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
+}
+
+/* END blob_cleanup */
+
+/* START spdk_bs_create_snapshot */
+
+static void
+_spdk_bs_snapshot_origblob_sync_cpl(void *cb_arg, int bserrno)
+{
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *newblob = ctx->new.blob;
+
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_newblob_cleanup(ctx, bserrno);
return;
}
- ctx->bs = bs;
-
- /* Allocate memory for the super block */
- ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
- if (!ctx->super) {
- free(ctx);
- _spdk_bs_free(bs);
+ /* Remove metadata descriptor SNAPSHOT_IN_PROGRESS */
+ bserrno = _spdk_blob_remove_xattr(newblob, SNAPSHOT_IN_PROGRESS, true);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
return;
}
- memcpy(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
- sizeof(ctx->super->signature));
- ctx->super->version = SPDK_BS_VERSION;
- ctx->super->length = sizeof(*ctx->super);
- ctx->super->super_blob = bs->super_blob;
- ctx->super->clean = 0;
- ctx->super->cluster_size = bs->cluster_sz;
- /* Calculate how many pages the metadata consumes at the front
- * of the disk.
- */
+ _spdk_bs_blob_list_add(ctx->original.blob);
- /* The super block uses 1 page */
- num_md_pages = 1;
+ spdk_blob_set_read_only(newblob);
- /* The used_md_pages mask requires 1 bit per metadata page, rounded
- * up to the nearest page, plus a header.
- */
- ctx->super->used_page_mask_start = num_md_pages;
- ctx->super->used_page_mask_len = divide_round_up(sizeof(struct spdk_bs_md_mask) +
- divide_round_up(bs->md_len, 8),
- sizeof(struct spdk_blob_md_page));
- num_md_pages += ctx->super->used_page_mask_len;
+ /* sync snapshot metadata */
+ spdk_blob_sync_md(newblob, _spdk_bs_clone_snapshot_origblob_cleanup, cb_arg);
+}
- /* The used_clusters mask requires 1 bit per cluster, rounded
- * up to the nearest page, plus a header.
- */
- ctx->super->used_cluster_mask_start = num_md_pages;
- ctx->super->used_cluster_mask_len = divide_round_up(sizeof(struct spdk_bs_md_mask) +
- divide_round_up(bs->total_clusters, 8),
- sizeof(struct spdk_blob_md_page));
- num_md_pages += ctx->super->used_cluster_mask_len;
+static void
+_spdk_bs_snapshot_newblob_sync_cpl(void *cb_arg, int bserrno)
+{
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *origblob = ctx->original.blob;
+ struct spdk_blob *newblob = ctx->new.blob;
- /* The metadata region size was chosen above */
- ctx->super->md_start = bs->md_start = num_md_pages;
- ctx->super->md_len = bs->md_len;
- num_md_pages += bs->md_len;
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_newblob_cleanup(ctx, bserrno);
+ return;
+ }
- /* Claim all of the clusters used by the metadata */
- for (i = 0; i < divide_round_up(num_md_pages, bs->pages_per_cluster); i++) {
- _spdk_bs_claim_cluster(bs, i);
+ /* Set internal xattr for snapshot id */
+ bserrno = _spdk_blob_set_xattr(origblob, BLOB_SNAPSHOT, &newblob->id, sizeof(spdk_blob_id), true);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_newblob_cleanup(ctx, bserrno);
+ return;
}
- cpl.type = SPDK_BS_CPL_TYPE_BS_HANDLE;
- cpl.u.bs_handle.cb_fn = cb_fn;
- cpl.u.bs_handle.cb_arg = cb_arg;
- cpl.u.bs_handle.bs = bs;
+ _spdk_bs_blob_list_remove(origblob);
+ origblob->parent_id = newblob->id;
- seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
- if (!seq) {
- spdk_free(ctx->super);
- free(ctx);
- _spdk_bs_free(bs);
- cb_fn(cb_arg, NULL, -ENOMEM);
+ /* Create new back_bs_dev for snapshot */
+ origblob->back_bs_dev = spdk_bs_create_blob_bs_dev(newblob);
+ if (origblob->back_bs_dev == NULL) {
+ _spdk_bs_clone_snapshot_newblob_cleanup(ctx, -EINVAL);
return;
}
- /* TRIM the entire device */
- spdk_bs_sequence_unmap(seq, 0, bs->dev->blockcnt, _spdk_bs_init_trim_cpl, ctx);
+ /* set clone blob as thin provisioned */
+ _spdk_blob_set_thin_provision(origblob);
+
+ _spdk_bs_blob_list_add(newblob);
+
+ /* Zero out origblob cluster map */
+ memset(origblob->active.clusters, 0,
+ origblob->active.num_clusters * sizeof(origblob->active.clusters));
+
+ /* sync clone metadata */
+ spdk_blob_sync_md(origblob, _spdk_bs_snapshot_origblob_sync_cpl, ctx);
}
-/* END spdk_bs_init */
+static void
+_spdk_bs_snapshot_freeze_cpl(void *cb_arg, int rc)
+{
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *origblob = ctx->original.blob;
+ struct spdk_blob *newblob = ctx->new.blob;
+ int bserrno;
-/* START spdk_bs_unload */
+ if (rc != 0) {
+ _spdk_bs_clone_snapshot_newblob_cleanup(ctx, rc);
+ return;
+ }
-struct spdk_bs_unload_ctx {
- struct spdk_blob_store *bs;
- struct spdk_bs_super_block *super;
+ ctx->frozen = true;
+
+ /* set new back_bs_dev for snapshot */
+ newblob->back_bs_dev = origblob->back_bs_dev;
+ /* Set invalid flags from origblob */
+ newblob->invalid_flags = origblob->invalid_flags;
+
+ /* inherit parent from original blob if set */
+ newblob->parent_id = origblob->parent_id;
+ if (origblob->parent_id != SPDK_BLOBID_INVALID) {
+ /* Set internal xattr for snapshot id */
+ bserrno = _spdk_blob_set_xattr(newblob, BLOB_SNAPSHOT,
+ &origblob->parent_id, sizeof(spdk_blob_id), true);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_newblob_cleanup(ctx, bserrno);
+ return;
+ }
+ }
- struct spdk_bs_md_mask *mask;
-};
+ /* Copy cluster map to snapshot */
+ memcpy(newblob->active.clusters, origblob->active.clusters,
+ origblob->active.num_clusters * sizeof(origblob->active.clusters));
+
+ /* sync snapshot metadata */
+ spdk_blob_sync_md(newblob, _spdk_bs_snapshot_newblob_sync_cpl, ctx);
+}
static void
-_spdk_bs_unload_write_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_snapshot_newblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
{
- struct spdk_bs_unload_ctx *ctx = cb_arg;
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *origblob = ctx->original.blob;
+ struct spdk_blob *newblob = _blob;
- spdk_free(ctx->super);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
+ return;
+ }
- spdk_bs_sequence_finish(seq, bserrno);
+ ctx->new.blob = newblob;
- _spdk_bs_free(ctx->bs);
- free(ctx);
+ _spdk_blob_freeze_io(origblob, _spdk_bs_snapshot_freeze_cpl, ctx);
}
static void
-_spdk_bs_unload_write_used_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_snapshot_newblob_create_cpl(void *cb_arg, spdk_blob_id blobid, int bserrno)
{
- struct spdk_bs_unload_ctx *ctx = cb_arg;
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *origblob = ctx->original.blob;
- spdk_free(ctx->mask);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
+ return;
+ }
- /* Update the values in the super block */
- ctx->super->super_blob = ctx->bs->super_blob;
- ctx->super->clean = 1;
+ ctx->new.id = blobid;
+ ctx->cpl.u.blobid.blobid = blobid;
- spdk_bs_sequence_write(seq, ctx->super, _spdk_bs_page_to_lba(ctx->bs, 0),
- _spdk_bs_byte_to_lba(ctx->bs, sizeof(*ctx->super)),
- _spdk_bs_unload_write_super_cpl, ctx);
+ spdk_bs_open_blob(origblob->bs, ctx->new.id, _spdk_bs_snapshot_newblob_open_cpl, ctx);
}
+
static void
-_spdk_bs_unload_write_used_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_xattr_snapshot(void *arg, const char *name,
+ const void **value, size_t *value_len)
{
- struct spdk_bs_unload_ctx *ctx = cb_arg;
- uint32_t i;
- uint64_t lba, lba_count;
+ assert(strncmp(name, SNAPSHOT_IN_PROGRESS, sizeof(SNAPSHOT_IN_PROGRESS)) == 0);
- spdk_free(ctx->mask);
+ struct spdk_blob *blob = (struct spdk_blob *)arg;
+ *value = &blob->id;
+ *value_len = sizeof(blob->id);
+}
- /* Write out the used clusters mask */
- ctx->mask = spdk_zmalloc(ctx->super->used_cluster_mask_len * sizeof(struct spdk_blob_md_page),
- 0x1000, NULL);
- if (!ctx->mask) {
- spdk_free(ctx->super);
- free(ctx);
- spdk_bs_sequence_finish(seq, -ENOMEM);
+static void
+_spdk_bs_snapshot_origblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
+{
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob_opts opts;
+ struct spdk_blob_xattr_opts internal_xattrs;
+ char *xattrs_names[] = { SNAPSHOT_IN_PROGRESS };
+
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_cleanup_finish(ctx, bserrno);
return;
}
- ctx->mask->type = SPDK_MD_MASK_TYPE_USED_CLUSTERS;
- ctx->mask->length = ctx->bs->total_clusters;
- assert(ctx->mask->length == spdk_bit_array_capacity(ctx->bs->used_clusters));
+ ctx->original.blob = _blob;
- i = 0;
- while (true) {
- i = spdk_bit_array_find_first_set(ctx->bs->used_clusters, i);
- if (i > ctx->mask->length) {
- break;
- }
- ctx->mask->mask[i / 8] |= 1U << (i % 8);
- i++;
+ if (_blob->data_ro || _blob->md_ro) {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Cannot create snapshot from read only blob with id %lu\n",
+ _blob->id);
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, -EINVAL);
+ return;
}
- lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_start);
- lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_len);
- spdk_bs_sequence_write(seq, ctx->mask, lba, lba_count,
- _spdk_bs_unload_write_used_clusters_cpl, ctx);
+ spdk_blob_opts_init(&opts);
+ _spdk_blob_xattrs_init(&internal_xattrs);
+
+ /* Change the size of new blob to the same as in original blob,
+ * but do not allocate clusters */
+ opts.thin_provision = true;
+ opts.num_clusters = spdk_blob_get_num_clusters(_blob);
+
+ /* If there are any xattrs specified for snapshot, set them now */
+ if (ctx->xattrs) {
+ memcpy(&opts.xattrs, ctx->xattrs, sizeof(*ctx->xattrs));
+ }
+ /* Set internal xattr SNAPSHOT_IN_PROGRESS */
+ internal_xattrs.count = 1;
+ internal_xattrs.ctx = _blob;
+ internal_xattrs.names = xattrs_names;
+ internal_xattrs.get_value = _spdk_bs_xattr_snapshot;
+
+ _spdk_bs_create_blob(_blob->bs, &opts, &internal_xattrs,
+ _spdk_bs_snapshot_newblob_create_cpl, ctx);
}
-static void
-_spdk_bs_unload_read_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+void spdk_bs_create_snapshot(struct spdk_blob_store *bs, spdk_blob_id blobid,
+ const struct spdk_blob_xattr_opts *snapshot_xattrs,
+ spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
{
- struct spdk_bs_unload_ctx *ctx = cb_arg;
- uint32_t i;
- uint64_t lba, lba_count;
+ struct spdk_clone_snapshot_ctx *ctx = calloc(1, sizeof(*ctx));
- /* Write out the used page mask */
- ctx->mask = spdk_zmalloc(ctx->super->used_page_mask_len * sizeof(struct spdk_blob_md_page),
- 0x1000, NULL);
- if (!ctx->mask) {
- spdk_free(ctx->super);
- free(ctx);
- spdk_bs_sequence_finish(seq, -ENOMEM);
+ if (!ctx) {
+ cb_fn(cb_arg, SPDK_BLOBID_INVALID, -ENOMEM);
return;
}
+ ctx->cpl.type = SPDK_BS_CPL_TYPE_BLOBID;
+ ctx->cpl.u.blobid.cb_fn = cb_fn;
+ ctx->cpl.u.blobid.cb_arg = cb_arg;
+ ctx->cpl.u.blobid.blobid = SPDK_BLOBID_INVALID;
+ ctx->bserrno = 0;
+ ctx->frozen = false;
+ ctx->original.id = blobid;
+ ctx->xattrs = snapshot_xattrs;
+
+ spdk_bs_open_blob(bs, ctx->original.id, _spdk_bs_snapshot_origblob_open_cpl, ctx);
+}
+/* END spdk_bs_create_snapshot */
- ctx->mask->type = SPDK_MD_MASK_TYPE_USED_PAGES;
- ctx->mask->length = ctx->super->md_len;
- assert(ctx->mask->length == spdk_bit_array_capacity(ctx->bs->used_md_pages));
+/* START spdk_bs_create_clone */
- i = 0;
- while (true) {
- i = spdk_bit_array_find_first_set(ctx->bs->used_md_pages, i);
- if (i > ctx->mask->length) {
- break;
- }
- ctx->mask->mask[i / 8] |= 1U << (i % 8);
- i++;
- }
+static void
+_spdk_bs_xattr_clone(void *arg, const char *name,
+ const void **value, size_t *value_len)
+{
+ assert(strncmp(name, BLOB_SNAPSHOT, sizeof(BLOB_SNAPSHOT)) == 0);
- lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_start);
- lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_len);
- spdk_bs_sequence_write(seq, ctx->mask, lba, lba_count,
- _spdk_bs_unload_write_used_pages_cpl, ctx);
+ struct spdk_blob *blob = (struct spdk_blob *)arg;
+ *value = &blob->id;
+ *value_len = sizeof(blob->id);
}
-void
-spdk_bs_unload(struct spdk_blob_store *bs, spdk_bs_op_complete cb_fn, void *cb_arg)
+static void
+_spdk_bs_clone_newblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
{
- struct spdk_bs_cpl cpl;
- spdk_bs_sequence_t *seq;
- struct spdk_bs_unload_ctx *ctx;
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *clone = _blob;
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Syncing blobstore\n");
+ ctx->new.blob = clone;
+ _spdk_bs_blob_list_add(clone);
- ctx = calloc(1, sizeof(*ctx));
- if (!ctx) {
- cb_fn(cb_arg, -ENOMEM);
- return;
- }
+ spdk_blob_close(clone, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
+}
- ctx->bs = bs;
+static void
+_spdk_bs_clone_newblob_create_cpl(void *cb_arg, spdk_blob_id blobid, int bserrno)
+{
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
- ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL);
- if (!ctx->super) {
- free(ctx);
- cb_fn(cb_arg, -ENOMEM);
+ ctx->cpl.u.blobid.blobid = blobid;
+ spdk_bs_open_blob(ctx->original.blob->bs, blobid, _spdk_bs_clone_newblob_open_cpl, ctx);
+}
+
+static void
+_spdk_bs_clone_origblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
+{
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob_opts opts;
+ struct spdk_blob_xattr_opts internal_xattrs;
+ char *xattr_names[] = { BLOB_SNAPSHOT };
+
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_cleanup_finish(ctx, bserrno);
return;
}
- cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
- cpl.u.bs_basic.cb_fn = cb_fn;
- cpl.u.bs_basic.cb_arg = cb_arg;
+ ctx->original.blob = _blob;
- seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
- if (!seq) {
- spdk_free(ctx->super);
- free(ctx);
- cb_fn(cb_arg, -ENOMEM);
+ if (!_blob->data_ro || !_blob->md_ro) {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Clone not from read-only blob\n");
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, -EINVAL);
return;
}
- assert(TAILQ_EMPTY(&bs->blobs));
+ spdk_blob_opts_init(&opts);
+ _spdk_blob_xattrs_init(&internal_xattrs);
- /* Read super block */
- spdk_bs_sequence_read(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
- _spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
- _spdk_bs_unload_read_super_cpl, ctx);
-}
+ opts.thin_provision = true;
+ opts.num_clusters = spdk_blob_get_num_clusters(_blob);
+ if (ctx->xattrs) {
+ memcpy(&opts.xattrs, ctx->xattrs, sizeof(*ctx->xattrs));
+ }
-/* END spdk_bs_unload */
+ /* Set internal xattr BLOB_SNAPSHOT */
+ internal_xattrs.count = 1;
+ internal_xattrs.ctx = _blob;
+ internal_xattrs.names = xattr_names;
+ internal_xattrs.get_value = _spdk_bs_xattr_clone;
-void
-spdk_bs_set_super(struct spdk_blob_store *bs, spdk_blob_id blobid,
- spdk_bs_op_complete cb_fn, void *cb_arg)
-{
- bs->super_blob = blobid;
- cb_fn(cb_arg, 0);
+ _spdk_bs_create_blob(_blob->bs, &opts, &internal_xattrs,
+ _spdk_bs_clone_newblob_create_cpl, ctx);
}
-void
-spdk_bs_get_super(struct spdk_blob_store *bs,
- spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
+void spdk_bs_create_clone(struct spdk_blob_store *bs, spdk_blob_id blobid,
+ const struct spdk_blob_xattr_opts *clone_xattrs,
+ spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
{
- if (bs->super_blob == SPDK_BLOBID_INVALID) {
- cb_fn(cb_arg, SPDK_BLOBID_INVALID, -ENOENT);
- } else {
- cb_fn(cb_arg, bs->super_blob, 0);
+ struct spdk_clone_snapshot_ctx *ctx = calloc(1, sizeof(*ctx));
+
+ if (!ctx) {
+ cb_fn(cb_arg, SPDK_BLOBID_INVALID, -ENOMEM);
+ return;
}
-}
-uint64_t
-spdk_bs_get_cluster_size(struct spdk_blob_store *bs)
-{
- return bs->cluster_sz;
-}
+ ctx->cpl.type = SPDK_BS_CPL_TYPE_BLOBID;
+ ctx->cpl.u.blobid.cb_fn = cb_fn;
+ ctx->cpl.u.blobid.cb_arg = cb_arg;
+ ctx->cpl.u.blobid.blobid = SPDK_BLOBID_INVALID;
+ ctx->bserrno = 0;
+ ctx->xattrs = clone_xattrs;
+ ctx->original.id = blobid;
-uint64_t
-spdk_bs_get_page_size(struct spdk_blob_store *bs)
-{
- return sizeof(struct spdk_blob_md_page);
+ spdk_bs_open_blob(bs, ctx->original.id, _spdk_bs_clone_origblob_open_cpl, ctx);
}
-uint64_t
-spdk_bs_free_cluster_count(struct spdk_blob_store *bs)
-{
- return bs->num_free_clusters;
-}
+/* END spdk_bs_create_clone */
+
+/* START spdk_bs_inflate_blob */
-int spdk_bs_register_md_thread(struct spdk_blob_store *bs)
+static void
+_spdk_bs_inflate_blob_set_parent_cpl(void *cb_arg, struct spdk_blob *_parent, int bserrno)
{
- bs->md_channel = spdk_get_io_channel(bs, SPDK_IO_PRIORITY_DEFAULT, true,
- (void *)&bs->max_md_ops);
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *_blob = ctx->original.blob;
- return 0;
-}
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
+ return;
+ }
-int spdk_bs_unregister_md_thread(struct spdk_blob_store *bs)
-{
- spdk_put_io_channel(bs->md_channel);
+ assert(_parent != NULL);
- return 0;
-}
+ _spdk_bs_blob_list_remove(_blob);
+ _blob->parent_id = _parent->id;
+ _spdk_blob_set_xattr(_blob, BLOB_SNAPSHOT, &_blob->parent_id,
+ sizeof(spdk_blob_id), true);
-spdk_blob_id spdk_blob_get_id(struct spdk_blob *blob)
-{
- assert(blob != NULL);
+ _blob->back_bs_dev->destroy(_blob->back_bs_dev);
+ _blob->back_bs_dev = spdk_bs_create_blob_bs_dev(_parent);
+ _spdk_bs_blob_list_add(_blob);
- return blob->id;
+ spdk_blob_sync_md(_blob, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
}
-uint64_t spdk_blob_get_num_pages(struct spdk_blob *blob)
+static void
+_spdk_bs_inflate_blob_done(void *cb_arg, int bserrno)
{
- assert(blob != NULL);
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *_blob = ctx->original.blob;
+ struct spdk_blob *_parent;
- return _spdk_bs_cluster_to_page(blob->bs, blob->active.num_clusters);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
+ return;
+ }
+
+ if (ctx->allocate_all) {
+ /* remove thin provisioning */
+ _spdk_bs_blob_list_remove(_blob);
+ _spdk_blob_remove_xattr(_blob, BLOB_SNAPSHOT, true);
+ _blob->invalid_flags = _blob->invalid_flags & ~SPDK_BLOB_THIN_PROV;
+ _blob->back_bs_dev->destroy(_blob->back_bs_dev);
+ _blob->back_bs_dev = NULL;
+ _blob->parent_id = SPDK_BLOBID_INVALID;
+ } else {
+ _parent = ((struct spdk_blob_bs_dev *)(_blob->back_bs_dev))->blob;
+ if (_parent->parent_id != SPDK_BLOBID_INVALID) {
+ /* We must change the parent of the inflated blob */
+ spdk_bs_open_blob(_blob->bs, _parent->parent_id,
+ _spdk_bs_inflate_blob_set_parent_cpl, ctx);
+ return;
+ }
+
+ _spdk_bs_blob_list_remove(_blob);
+ _spdk_blob_remove_xattr(_blob, BLOB_SNAPSHOT, true);
+ _blob->parent_id = SPDK_BLOBID_INVALID;
+ _blob->back_bs_dev->destroy(_blob->back_bs_dev);
+ _blob->back_bs_dev = spdk_bs_create_zeroes_dev();
+ }
+
+ _blob->state = SPDK_BLOB_STATE_DIRTY;
+ spdk_blob_sync_md(_blob, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
}
-uint64_t spdk_blob_get_num_clusters(struct spdk_blob *blob)
+/* Check if cluster needs allocation */
+static inline bool
+_spdk_bs_cluster_needs_allocation(struct spdk_blob *blob, uint64_t cluster, bool allocate_all)
{
+ struct spdk_blob_bs_dev *b;
+
assert(blob != NULL);
- return blob->active.num_clusters;
-}
+ if (blob->active.clusters[cluster] != 0) {
+ /* Cluster is already allocated */
+ return false;
+ }
+
+ if (blob->parent_id == SPDK_BLOBID_INVALID) {
+ /* Blob have no parent blob */
+ return allocate_all;
+ }
-/* START spdk_bs_md_create_blob */
+ b = (struct spdk_blob_bs_dev *)blob->back_bs_dev;
+ return (allocate_all || b->blob->active.clusters[cluster] != 0);
+}
static void
-_spdk_bs_md_create_blob_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_inflate_blob_touch_next(void *cb_arg, int bserrno)
{
- struct spdk_blob *blob = cb_arg;
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ struct spdk_blob *_blob = ctx->original.blob;
+ uint64_t offset;
- _spdk_blob_free(blob);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
+ return;
+ }
- spdk_bs_sequence_finish(seq, bserrno);
+ for (; ctx->cluster < _blob->active.num_clusters; ctx->cluster++) {
+ if (_spdk_bs_cluster_needs_allocation(_blob, ctx->cluster, ctx->allocate_all)) {
+ break;
+ }
+ }
+
+ if (ctx->cluster < _blob->active.num_clusters) {
+ offset = _spdk_bs_cluster_to_lba(_blob->bs, ctx->cluster);
+
+ /* We may safely increment a cluster before write */
+ ctx->cluster++;
+
+ /* Use zero length write to touch a cluster */
+ spdk_blob_io_write(_blob, ctx->channel, NULL, offset, 0,
+ _spdk_bs_inflate_blob_touch_next, ctx);
+ } else {
+ _spdk_bs_inflate_blob_done(cb_arg, bserrno);
+ }
}
-void spdk_bs_md_create_blob(struct spdk_blob_store *bs,
- spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
+static void
+_spdk_bs_inflate_blob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
{
- struct spdk_blob *blob;
- uint32_t page_idx;
- struct spdk_bs_cpl cpl;
- spdk_bs_sequence_t *seq;
- spdk_blob_id id;
+ struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
+ uint64_t lfc; /* lowest free cluster */
+ uint64_t i;
- page_idx = spdk_bit_array_find_first_clear(bs->used_md_pages, 0);
- if (page_idx >= spdk_bit_array_capacity(bs->used_md_pages)) {
- cb_fn(cb_arg, 0, -ENOMEM);
+ if (bserrno != 0) {
+ _spdk_bs_clone_snapshot_cleanup_finish(ctx, bserrno);
return;
}
- spdk_bit_array_set(bs->used_md_pages, page_idx);
+ ctx->original.blob = _blob;
- /* The blob id is a 64 bit number. The lower 32 bits are the page_idx. The upper
- * 32 bits are not currently used. Stick a 1 there just to catch bugs where the
- * code assumes blob id == page_idx.
+ if (!ctx->allocate_all && _blob->parent_id == SPDK_BLOBID_INVALID) {
+ /* This blob have no parent, so we cannot decouple it. */
+ SPDK_ERRLOG("Cannot decouple parent of blob with no parent.\n");
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, -EINVAL);
+ return;
+ }
+
+ if (spdk_blob_is_thin_provisioned(_blob) == false) {
+ /* This is not thin provisioned blob. No need to inflate. */
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, 0);
+ return;
+ }
+
+ /* Do two passes - one to verify that we can obtain enough clusters
+ * and another to actually claim them.
*/
- id = (1ULL << 32) | page_idx;
+ lfc = 0;
+ for (i = 0; i < _blob->active.num_clusters; i++) {
+ if (_spdk_bs_cluster_needs_allocation(_blob, i, ctx->allocate_all)) {
+ lfc = spdk_bit_array_find_first_clear(_blob->bs->used_clusters, lfc);
+ if (lfc == UINT32_MAX) {
+ /* No more free clusters. Cannot satisfy the request */
+ _spdk_bs_clone_snapshot_origblob_cleanup(ctx, -ENOSPC);
+ return;
+ }
+ lfc++;
+ }
+ }
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Creating blob with id %lu at page %u\n", id, page_idx);
+ ctx->cluster = 0;
+ _spdk_bs_inflate_blob_touch_next(ctx, 0);
+}
- blob = _spdk_blob_alloc(bs, id);
- if (!blob) {
- cb_fn(cb_arg, 0, -ENOMEM);
+static void
+_spdk_bs_inflate_blob(struct spdk_blob_store *bs, struct spdk_io_channel *channel,
+ spdk_blob_id blobid, bool allocate_all, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ struct spdk_clone_snapshot_ctx *ctx = calloc(1, sizeof(*ctx));
+
+ if (!ctx) {
+ cb_fn(cb_arg, -ENOMEM);
return;
}
+ ctx->cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
+ ctx->cpl.u.bs_basic.cb_fn = cb_fn;
+ ctx->cpl.u.bs_basic.cb_arg = cb_arg;
+ ctx->bserrno = 0;
+ ctx->original.id = blobid;
+ ctx->channel = channel;
+ ctx->allocate_all = allocate_all;
+
+ spdk_bs_open_blob(bs, ctx->original.id, _spdk_bs_inflate_blob_open_cpl, ctx);
+}
- cpl.type = SPDK_BS_CPL_TYPE_BLOBID;
- cpl.u.blobid.cb_fn = cb_fn;
- cpl.u.blobid.cb_arg = cb_arg;
- cpl.u.blobid.blobid = blob->id;
+void
+spdk_bs_inflate_blob(struct spdk_blob_store *bs, struct spdk_io_channel *channel,
+ spdk_blob_id blobid, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ _spdk_bs_inflate_blob(bs, channel, blobid, true, cb_fn, cb_arg);
+}
- seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
- if (!seq) {
- _spdk_blob_free(blob);
- cb_fn(cb_arg, 0, -ENOMEM);
- return;
+void
+spdk_bs_blob_decouple_parent(struct spdk_blob_store *bs, struct spdk_io_channel *channel,
+ spdk_blob_id blobid, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ _spdk_bs_inflate_blob(bs, channel, blobid, false, cb_fn, cb_arg);
+}
+/* END spdk_bs_inflate_blob */
+
+/* START spdk_blob_resize */
+struct spdk_bs_resize_ctx {
+ spdk_blob_op_complete cb_fn;
+ void *cb_arg;
+ struct spdk_blob *blob;
+ uint64_t sz;
+ int rc;
+};
+
+static void
+_spdk_bs_resize_unfreeze_cpl(void *cb_arg, int rc)
+{
+ struct spdk_bs_resize_ctx *ctx = (struct spdk_bs_resize_ctx *)cb_arg;
+
+ if (rc != 0) {
+ SPDK_ERRLOG("Unfreeze failed, rc=%d\n", rc);
+ }
+
+ if (ctx->rc != 0) {
+ SPDK_ERRLOG("Unfreeze failed, ctx->rc=%d\n", ctx->rc);
+ rc = ctx->rc;
}
- _spdk_blob_persist(seq, blob, _spdk_bs_md_create_blob_cpl, blob);
+ ctx->blob->resize_in_progress = false;
+
+ ctx->cb_fn(ctx->cb_arg, rc);
+ free(ctx);
}
-/* END spdk_bs_md_create_blob */
+static void
+_spdk_bs_resize_freeze_cpl(void *cb_arg, int rc)
+{
+ struct spdk_bs_resize_ctx *ctx = (struct spdk_bs_resize_ctx *)cb_arg;
-/* START spdk_bs_md_resize_blob */
-int
-spdk_bs_md_resize_blob(struct spdk_blob *blob, uint64_t sz)
+ if (rc != 0) {
+ ctx->blob->resize_in_progress = false;
+ ctx->cb_fn(ctx->cb_arg, rc);
+ free(ctx);
+ return;
+ }
+
+ ctx->rc = _spdk_blob_resize(ctx->blob, ctx->sz);
+
+ _spdk_blob_unfreeze_io(ctx->blob, _spdk_bs_resize_unfreeze_cpl, ctx);
+}
+
+void
+spdk_blob_resize(struct spdk_blob *blob, uint64_t sz, spdk_blob_op_complete cb_fn, void *cb_arg)
{
- int rc;
+ struct spdk_bs_resize_ctx *ctx;
- assert(blob != NULL);
+ _spdk_blob_verify_md_op(blob);
+
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Resizing blob %lu to %lu clusters\n", blob->id, sz);
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Resizing blob %lu to %lu clusters\n", blob->id, sz);
+ if (blob->md_ro) {
+ cb_fn(cb_arg, -EPERM);
+ return;
+ }
if (sz == blob->active.num_clusters) {
- return 0;
+ cb_fn(cb_arg, 0);
+ return;
}
- rc = _spdk_resize_blob(blob, sz);
- if (rc < 0) {
- return rc;
+ if (blob->resize_in_progress) {
+ cb_fn(cb_arg, -EBUSY);
+ return;
}
- return 0;
+ ctx = calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ blob->resize_in_progress = true;
+ ctx->cb_fn = cb_fn;
+ ctx->cb_arg = cb_arg;
+ ctx->blob = blob;
+ ctx->sz = sz;
+ _spdk_blob_freeze_io(blob, _spdk_bs_resize_freeze_cpl, ctx);
}
-/* END spdk_bs_md_resize_blob */
+/* END spdk_blob_resize */
-/* START spdk_bs_md_delete_blob */
+/* START spdk_bs_delete_blob */
static void
-_spdk_bs_md_delete_blob_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_delete_close_cpl(void *cb_arg, int bserrno)
{
- struct spdk_blob *blob = cb_arg;
-
- _spdk_blob_free(blob);
+ spdk_bs_sequence_t *seq = cb_arg;
spdk_bs_sequence_finish(seq, bserrno);
}
static void
-_spdk_bs_md_delete_open_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_delete_persist_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
struct spdk_blob *blob = cb_arg;
+ if (bserrno != 0) {
+ /*
+ * We already removed this blob from the blobstore tailq, so
+ * we need to free it here since this is the last reference
+ * to it.
+ */
+ _spdk_blob_free(blob);
+ _spdk_bs_delete_close_cpl(seq, bserrno);
+ return;
+ }
+
+ /*
+ * This will immediately decrement the ref_count and call
+ * the completion routine since the metadata state is clean.
+ * By calling spdk_blob_close, we reduce the number of call
+ * points into code that touches the blob->open_ref count
+ * and the blobstore's blob list.
+ */
+ spdk_blob_close(blob, _spdk_bs_delete_close_cpl, seq);
+}
+
+static void
+_spdk_bs_delete_open_cpl(void *cb_arg, struct spdk_blob *blob, int bserrno)
+{
+ spdk_bs_sequence_t *seq = cb_arg;
+ uint32_t page_num;
+
+ if (bserrno != 0) {
+ spdk_bs_sequence_finish(seq, bserrno);
+ return;
+ }
+
+ _spdk_blob_verify_md_op(blob);
+
+ if (blob->open_ref > 1) {
+ /*
+ * Someone has this blob open (besides this delete context).
+ * Decrement the ref count directly and return -EBUSY.
+ */
+ blob->open_ref--;
+ spdk_bs_sequence_finish(seq, -EBUSY);
+ return;
+ }
+
+ bserrno = _spdk_bs_blob_list_remove(blob);
+ if (bserrno != 0) {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Remove blob #%" PRIu64 " from a list\n", blob->id);
+ spdk_bs_sequence_finish(seq, bserrno);
+ return;
+ }
+
+ /*
+ * Remove the blob from the blob_store list now, to ensure it does not
+ * get returned after this point by _spdk_blob_lookup().
+ */
+ TAILQ_REMOVE(&blob->bs->blobs, blob, link);
+ page_num = _spdk_bs_blobid_to_page(blob->id);
+ spdk_bit_array_clear(blob->bs->used_blobids, page_num);
blob->state = SPDK_BLOB_STATE_DIRTY;
blob->active.num_pages = 0;
- _spdk_resize_blob(blob, 0);
+ _spdk_blob_resize(blob, 0);
- _spdk_blob_persist(seq, blob, _spdk_bs_md_delete_blob_cpl, blob);
+ _spdk_blob_persist(seq, blob, _spdk_bs_delete_persist_cpl, blob);
}
void
-spdk_bs_md_delete_blob(struct spdk_blob_store *bs, spdk_blob_id blobid,
- spdk_blob_op_complete cb_fn, void *cb_arg)
+spdk_bs_delete_blob(struct spdk_blob_store *bs, spdk_blob_id blobid,
+ spdk_blob_op_complete cb_fn, void *cb_arg)
{
- struct spdk_blob *blob;
struct spdk_bs_cpl cpl;
- spdk_bs_sequence_t *seq;
+ spdk_bs_sequence_t *seq;
+ struct spdk_blob_list *snapshot_entry = NULL;
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Deleting blob %lu\n", blobid);
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Deleting blob %lu\n", blobid);
- blob = _spdk_blob_lookup(bs, blobid);
- if (blob) {
- assert(blob->open_ref > 0);
- cb_fn(cb_arg, -EINVAL);
- return;
- }
+ assert(spdk_get_thread() == bs->md_thread);
- blob = _spdk_blob_alloc(bs, blobid);
- if (!blob) {
- cb_fn(cb_arg, -ENOMEM);
- return;
+ /* Check if this is a snapshot with clones */
+ TAILQ_FOREACH(snapshot_entry, &bs->snapshots, link) {
+ if (snapshot_entry->id == blobid) {
+ break;
+ }
+ }
+ if (snapshot_entry != NULL) {
+ /* If snapshot have clones, we cannot remove it */
+ if (!TAILQ_EMPTY(&snapshot_entry->clones)) {
+ SPDK_ERRLOG("Cannot remove snapshot with clones\n");
+ cb_fn(cb_arg, -EBUSY);
+ return;
+ }
}
cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
if (!seq) {
- _spdk_blob_free(blob);
cb_fn(cb_arg, -ENOMEM);
return;
}
- _spdk_blob_load(seq, blob, _spdk_bs_md_delete_open_cpl, blob);
+ spdk_bs_open_blob(bs, blobid, _spdk_bs_delete_open_cpl, seq);
}
-/* END spdk_bs_md_delete_blob */
+/* END spdk_bs_delete_blob */
-/* START spdk_bs_md_open_blob */
+/* START spdk_bs_open_blob */
static void
-_spdk_bs_md_open_blob_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_bs_open_blob_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
struct spdk_blob *blob = cb_arg;
+ /* If the blob have crc error, we just return NULL. */
+ if (blob == NULL) {
+ seq->cpl.u.blob_handle.blob = NULL;
+ spdk_bs_sequence_finish(seq, bserrno);
+ return;
+ }
+
blob->open_ref++;
TAILQ_INSERT_HEAD(&blob->bs->blobs, blob, link);
spdk_bs_sequence_finish(seq, bserrno);
}
-void spdk_bs_md_open_blob(struct spdk_blob_store *bs, spdk_blob_id blobid,
- spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
+void spdk_bs_open_blob(struct spdk_blob_store *bs, spdk_blob_id blobid,
+ spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
{
struct spdk_blob *blob;
struct spdk_bs_cpl cpl;
spdk_bs_sequence_t *seq;
uint32_t page_num;
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Opening blob %lu\n", blobid);
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Opening blob %lu\n", blobid);
+ assert(spdk_get_thread() == bs->md_thread);
+
+ page_num = _spdk_bs_blobid_to_page(blobid);
+ if (spdk_bit_array_get(bs->used_blobids, page_num) == false) {
+ /* Invalid blobid */
+ cb_fn(cb_arg, NULL, -ENOENT);
+ return;
+ }
blob = _spdk_blob_lookup(bs, blobid);
if (blob) {
return;
}
- page_num = _spdk_bs_blobid_to_page(blobid);
- if (spdk_bit_array_get(bs->used_md_pages, page_num) == false) {
- /* Invalid blobid */
- cb_fn(cb_arg, NULL, -ENOENT);
- return;
- }
-
blob = _spdk_blob_alloc(bs, blobid);
if (!blob) {
cb_fn(cb_arg, NULL, -ENOMEM);
return;
}
- _spdk_blob_load(seq, blob, _spdk_bs_md_open_blob_cpl, blob);
+ _spdk_blob_load(seq, blob, _spdk_bs_open_blob_cpl, blob);
+}
+/* END spdk_bs_open_blob */
+
+/* START spdk_blob_set_read_only */
+int spdk_blob_set_read_only(struct spdk_blob *blob)
+{
+ _spdk_blob_verify_md_op(blob);
+
+ blob->data_ro_flags |= SPDK_BLOB_READ_ONLY;
+
+ blob->state = SPDK_BLOB_STATE_DIRTY;
+ return 0;
}
+/* END spdk_blob_set_read_only */
+
+/* START spdk_blob_sync_md */
-/* START spdk_bs_md_sync_blob */
static void
-_spdk_blob_sync_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
+_spdk_blob_sync_md_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
+ struct spdk_blob *blob = cb_arg;
+
+ if (bserrno == 0 && (blob->data_ro_flags & SPDK_BLOB_READ_ONLY)) {
+ blob->data_ro = true;
+ blob->md_ro = true;
+ }
+
spdk_bs_sequence_finish(seq, bserrno);
}
-void spdk_bs_md_sync_blob(struct spdk_blob *blob,
- spdk_blob_op_complete cb_fn, void *cb_arg)
+static void
+_spdk_blob_sync_md(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
{
struct spdk_bs_cpl cpl;
spdk_bs_sequence_t *seq;
- assert(blob != NULL);
+ cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
+ cpl.u.blob_basic.cb_fn = cb_fn;
+ cpl.u.blob_basic.cb_arg = cb_arg;
+
+ seq = spdk_bs_sequence_start(blob->bs->md_channel, &cpl);
+ if (!seq) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Syncing blob %lu\n", blob->id);
+ _spdk_blob_persist(seq, blob, _spdk_blob_sync_md_cpl, blob);
+}
- assert(blob->state != SPDK_BLOB_STATE_LOADING &&
- blob->state != SPDK_BLOB_STATE_SYNCING);
+void
+spdk_blob_sync_md(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ _spdk_blob_verify_md_op(blob);
- if (blob->state == SPDK_BLOB_STATE_CLEAN) {
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Syncing blob %lu\n", blob->id);
+
+ if (blob->md_ro) {
+ assert(blob->state == SPDK_BLOB_STATE_CLEAN);
cb_fn(cb_arg, 0);
return;
}
- cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
- cpl.u.blob_basic.cb_fn = cb_fn;
- cpl.u.blob_basic.cb_arg = cb_arg;
+ _spdk_blob_sync_md(blob, cb_fn, cb_arg);
+}
- seq = spdk_bs_sequence_start(blob->bs->md_channel, &cpl);
- if (!seq) {
- cb_fn(cb_arg, -ENOMEM);
+/* END spdk_blob_sync_md */
+
+struct spdk_blob_insert_cluster_ctx {
+ struct spdk_thread *thread;
+ struct spdk_blob *blob;
+ uint32_t cluster_num; /* cluster index in blob */
+ uint32_t cluster; /* cluster on disk */
+ int rc;
+ spdk_blob_op_complete cb_fn;
+ void *cb_arg;
+};
+
+static void
+_spdk_blob_insert_cluster_msg_cpl(void *arg)
+{
+ struct spdk_blob_insert_cluster_ctx *ctx = arg;
+
+ ctx->cb_fn(ctx->cb_arg, ctx->rc);
+ free(ctx);
+}
+
+static void
+_spdk_blob_insert_cluster_msg_cb(void *arg, int bserrno)
+{
+ struct spdk_blob_insert_cluster_ctx *ctx = arg;
+
+ ctx->rc = bserrno;
+ spdk_thread_send_msg(ctx->thread, _spdk_blob_insert_cluster_msg_cpl, ctx);
+}
+
+static void
+_spdk_blob_insert_cluster_msg(void *arg)
+{
+ struct spdk_blob_insert_cluster_ctx *ctx = arg;
+
+ ctx->rc = _spdk_blob_insert_cluster(ctx->blob, ctx->cluster_num, ctx->cluster);
+ if (ctx->rc != 0) {
+ spdk_thread_send_msg(ctx->thread, _spdk_blob_insert_cluster_msg_cpl, ctx);
return;
}
- _spdk_blob_persist(seq, blob, _spdk_blob_sync_cpl, blob);
+ ctx->blob->state = SPDK_BLOB_STATE_DIRTY;
+ _spdk_blob_sync_md(ctx->blob, _spdk_blob_insert_cluster_msg_cb, ctx);
}
-/* END spdk_bs_md_sync_blob */
+static void
+_spdk_blob_insert_cluster_on_md_thread(struct spdk_blob *blob, uint32_t cluster_num,
+ uint64_t cluster, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ struct spdk_blob_insert_cluster_ctx *ctx;
+
+ ctx = calloc(1, sizeof(*ctx));
+ if (ctx == NULL) {
+ cb_fn(cb_arg, -ENOMEM);
+ return;
+ }
+
+ ctx->thread = spdk_get_thread();
+ ctx->blob = blob;
+ ctx->cluster_num = cluster_num;
+ ctx->cluster = cluster;
+ ctx->cb_fn = cb_fn;
+ ctx->cb_arg = cb_arg;
+
+ spdk_thread_send_msg(blob->bs->md_thread, _spdk_blob_insert_cluster_msg, ctx);
+}
-/* START spdk_bs_md_close_blob */
+/* START spdk_blob_close */
static void
_spdk_blob_close_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
- struct spdk_blob **blob = cb_arg;
+ struct spdk_blob *blob = cb_arg;
- if ((*blob)->open_ref == 0) {
- TAILQ_REMOVE(&(*blob)->bs->blobs, (*blob), link);
- _spdk_blob_free((*blob));
+ if (bserrno == 0) {
+ blob->open_ref--;
+ if (blob->open_ref == 0) {
+ /*
+ * Blobs with active.num_pages == 0 are deleted blobs.
+ * these blobs are removed from the blob_store list
+ * when the deletion process starts - so don't try to
+ * remove them again.
+ */
+ if (blob->active.num_pages > 0) {
+ TAILQ_REMOVE(&blob->bs->blobs, blob, link);
+ }
+ _spdk_blob_free(blob);
+ }
}
- *blob = NULL;
-
spdk_bs_sequence_finish(seq, bserrno);
}
-void spdk_bs_md_close_blob(struct spdk_blob **b,
- spdk_blob_op_complete cb_fn, void *cb_arg)
+void spdk_blob_close(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
{
struct spdk_bs_cpl cpl;
- struct spdk_blob *blob;
spdk_bs_sequence_t *seq;
- assert(b != NULL);
- blob = *b;
- assert(blob != NULL);
-
- SPDK_TRACELOG(SPDK_TRACE_BLOB, "Closing blob %lu\n", blob->id);
+ _spdk_blob_verify_md_op(blob);
- assert(blob->state != SPDK_BLOB_STATE_LOADING &&
- blob->state != SPDK_BLOB_STATE_SYNCING);
+ SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Closing blob %lu\n", blob->id);
if (blob->open_ref == 0) {
cb_fn(cb_arg, -EBADF);
return;
}
- blob->open_ref--;
-
cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
cpl.u.blob_basic.cb_fn = cb_fn;
cpl.u.blob_basic.cb_arg = cb_arg;
return;
}
- if (blob->state == SPDK_BLOB_STATE_CLEAN) {
- _spdk_blob_close_cpl(seq, b, 0);
- return;
- }
-
/* Sync metadata */
- _spdk_blob_persist(seq, blob, _spdk_blob_close_cpl, b);
+ _spdk_blob_persist(seq, blob, _spdk_blob_close_cpl, blob);
}
-/* END spdk_bs_md_close_blob */
+/* END spdk_blob_close */
-struct spdk_io_channel *spdk_bs_alloc_io_channel(struct spdk_blob_store *bs,
- uint32_t priority, uint32_t max_ops)
+struct spdk_io_channel *spdk_bs_alloc_io_channel(struct spdk_blob_store *bs)
{
- return spdk_get_io_channel(bs, priority, true, (void *)&max_ops);
+ return spdk_get_io_channel(bs);
}
void spdk_bs_free_io_channel(struct spdk_io_channel *channel)
spdk_put_io_channel(channel);
}
-void spdk_bs_io_flush_channel(struct spdk_io_channel *channel,
- spdk_blob_op_complete cb_fn, void *cb_arg)
+void spdk_blob_io_unmap(struct spdk_blob *blob, struct spdk_io_channel *channel,
+ uint64_t offset, uint64_t length, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ _spdk_blob_request_submit_op(blob, channel, NULL, offset, length, cb_fn, cb_arg,
+ SPDK_BLOB_UNMAP);
+}
+
+void spdk_blob_io_write_zeroes(struct spdk_blob *blob, struct spdk_io_channel *channel,
+ uint64_t offset, uint64_t length, spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ _spdk_blob_request_submit_op(blob, channel, NULL, offset, length, cb_fn, cb_arg,
+ SPDK_BLOB_WRITE_ZEROES);
+}
+
+void spdk_blob_io_write(struct spdk_blob *blob, struct spdk_io_channel *channel,
+ void *payload, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg)
+{
+ _spdk_blob_request_submit_op(blob, channel, payload, offset, length, cb_fn, cb_arg,
+ SPDK_BLOB_WRITE);
+}
+
+void spdk_blob_io_read(struct spdk_blob *blob, struct spdk_io_channel *channel,
+ void *payload, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg)
{
- /* Flush is synchronous right now */
- cb_fn(cb_arg, 0);
+ _spdk_blob_request_submit_op(blob, channel, payload, offset, length, cb_fn, cb_arg,
+ SPDK_BLOB_READ);
}
-void spdk_bs_io_write_blob(struct spdk_blob *blob, struct spdk_io_channel *channel,
- void *payload, uint64_t offset, uint64_t length,
- spdk_blob_op_complete cb_fn, void *cb_arg)
+void spdk_blob_io_writev(struct spdk_blob *blob, struct spdk_io_channel *channel,
+ struct iovec *iov, int iovcnt, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg)
{
- _spdk_blob_request_submit_rw(blob, channel, payload, offset, length, cb_fn, cb_arg, false);
+ _spdk_blob_request_submit_rw_iov(blob, channel, iov, iovcnt, offset, length, cb_fn, cb_arg, false);
}
-void spdk_bs_io_read_blob(struct spdk_blob *blob, struct spdk_io_channel *channel,
- void *payload, uint64_t offset, uint64_t length,
- spdk_blob_op_complete cb_fn, void *cb_arg)
+void spdk_blob_io_readv(struct spdk_blob *blob, struct spdk_io_channel *channel,
+ struct iovec *iov, int iovcnt, uint64_t offset, uint64_t length,
+ spdk_blob_op_complete cb_fn, void *cb_arg)
{
- _spdk_blob_request_submit_rw(blob, channel, payload, offset, length, cb_fn, cb_arg, true);
+ _spdk_blob_request_submit_rw_iov(blob, channel, iov, iovcnt, offset, length, cb_fn, cb_arg, true);
}
struct spdk_bs_iter_ctx {
};
static void
-_spdk_bs_iter_cpl(void *cb_arg, struct spdk_blob *blob, int bserrno)
+_spdk_bs_iter_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
{
struct spdk_bs_iter_ctx *ctx = cb_arg;
struct spdk_blob_store *bs = ctx->bs;
spdk_blob_id id;
if (bserrno == 0) {
- ctx->cb_fn(ctx->cb_arg, blob, bserrno);
+ ctx->cb_fn(ctx->cb_arg, _blob, bserrno);
free(ctx);
return;
}
ctx->page_num++;
- ctx->page_num = spdk_bit_array_find_first_set(bs->used_md_pages, ctx->page_num);
- if (ctx->page_num >= spdk_bit_array_capacity(bs->used_md_pages)) {
+ ctx->page_num = spdk_bit_array_find_first_set(bs->used_blobids, ctx->page_num);
+ if (ctx->page_num >= spdk_bit_array_capacity(bs->used_blobids)) {
ctx->cb_fn(ctx->cb_arg, NULL, -ENOENT);
free(ctx);
return;
}
- id = (1ULL << 32) | ctx->page_num;
-
- blob = _spdk_blob_lookup(bs, id);
- if (blob) {
- blob->open_ref++;
- ctx->cb_fn(ctx->cb_arg, blob, 0);
- free(ctx);
- return;
- }
+ id = _spdk_bs_page_to_blobid(ctx->page_num);
- spdk_bs_md_open_blob(bs, id, _spdk_bs_iter_cpl, ctx);
+ spdk_bs_open_blob(bs, id, _spdk_bs_iter_cpl, ctx);
}
void
-spdk_bs_md_iter_first(struct spdk_blob_store *bs,
- spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
+spdk_bs_iter_first(struct spdk_blob_store *bs,
+ spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
{
struct spdk_bs_iter_ctx *ctx;
}
void
-spdk_bs_md_iter_next(struct spdk_blob_store *bs, struct spdk_blob **b,
- spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
+spdk_bs_iter_next(struct spdk_blob_store *bs, struct spdk_blob *blob,
+ spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
{
struct spdk_bs_iter_ctx *ctx;
- struct spdk_blob *blob;
- assert(b != NULL);
- blob = *b;
assert(blob != NULL);
ctx = calloc(1, sizeof(*ctx));
ctx->cb_arg = cb_arg;
/* Close the existing blob */
- spdk_bs_md_close_blob(b, _spdk_bs_iter_close_cpl, ctx);
+ spdk_blob_close(blob, _spdk_bs_iter_close_cpl, ctx);
}
-int
-spdk_blob_md_set_xattr(struct spdk_blob *blob, const char *name, const void *value,
- uint16_t value_len)
+static int
+_spdk_blob_set_xattr(struct spdk_blob *blob, const char *name, const void *value,
+ uint16_t value_len, bool internal)
{
- struct spdk_xattr *xattr;
+ struct spdk_xattr_tailq *xattrs;
+ struct spdk_xattr *xattr;
- assert(blob != NULL);
+ _spdk_blob_verify_md_op(blob);
+
+ if (blob->md_ro) {
+ return -EPERM;
+ }
- assert(blob->state != SPDK_BLOB_STATE_LOADING &&
- blob->state != SPDK_BLOB_STATE_SYNCING);
+ if (internal) {
+ xattrs = &blob->xattrs_internal;
+ blob->invalid_flags |= SPDK_BLOB_INTERNAL_XATTR;
+ } else {
+ xattrs = &blob->xattrs;
+ }
- TAILQ_FOREACH(xattr, &blob->xattrs, link) {
+ TAILQ_FOREACH(xattr, xattrs, link) {
if (!strcmp(name, xattr->name)) {
free(xattr->value);
xattr->value_len = value_len;
xattr = calloc(1, sizeof(*xattr));
if (!xattr) {
- return -1;
+ return -ENOMEM;
}
xattr->name = strdup(name);
xattr->value_len = value_len;
xattr->value = malloc(value_len);
memcpy(xattr->value, value, value_len);
- TAILQ_INSERT_TAIL(&blob->xattrs, xattr, link);
+ TAILQ_INSERT_TAIL(xattrs, xattr, link);
blob->state = SPDK_BLOB_STATE_DIRTY;
}
int
-spdk_blob_md_remove_xattr(struct spdk_blob *blob, const char *name)
+spdk_blob_set_xattr(struct spdk_blob *blob, const char *name, const void *value,
+ uint16_t value_len)
+{
+ return _spdk_blob_set_xattr(blob, name, value, value_len, false);
+}
+
+static int
+_spdk_blob_remove_xattr(struct spdk_blob *blob, const char *name, bool internal)
{
+ struct spdk_xattr_tailq *xattrs;
struct spdk_xattr *xattr;
- assert(blob != NULL);
+ _spdk_blob_verify_md_op(blob);
- assert(blob->state != SPDK_BLOB_STATE_LOADING &&
- blob->state != SPDK_BLOB_STATE_SYNCING);
+ if (blob->md_ro) {
+ return -EPERM;
+ }
+ xattrs = internal ? &blob->xattrs_internal : &blob->xattrs;
- TAILQ_FOREACH(xattr, &blob->xattrs, link) {
+ TAILQ_FOREACH(xattr, xattrs, link) {
if (!strcmp(name, xattr->name)) {
- TAILQ_REMOVE(&blob->xattrs, xattr, link);
+ TAILQ_REMOVE(xattrs, xattr, link);
free(xattr->value);
free(xattr->name);
free(xattr);
+ if (internal && TAILQ_EMPTY(&blob->xattrs_internal)) {
+ blob->invalid_flags &= ~SPDK_BLOB_INTERNAL_XATTR;
+ }
blob->state = SPDK_BLOB_STATE_DIRTY;
return 0;
}
int
-spdk_bs_md_get_xattr_value(struct spdk_blob *blob, const char *name,
- const void **value, size_t *value_len)
+spdk_blob_remove_xattr(struct spdk_blob *blob, const char *name)
+{
+ return _spdk_blob_remove_xattr(blob, name, false);
+}
+
+static int
+_spdk_blob_get_xattr_value(struct spdk_blob *blob, const char *name,
+ const void **value, size_t *value_len, bool internal)
{
struct spdk_xattr *xattr;
+ struct spdk_xattr_tailq *xattrs;
+
+ xattrs = internal ? &blob->xattrs_internal : &blob->xattrs;
- TAILQ_FOREACH(xattr, &blob->xattrs, link) {
+ TAILQ_FOREACH(xattr, xattrs, link) {
if (!strcmp(name, xattr->name)) {
*value = xattr->value;
*value_len = xattr->value_len;
return 0;
}
}
-
return -ENOENT;
}
+int
+spdk_blob_get_xattr_value(struct spdk_blob *blob, const char *name,
+ const void **value, size_t *value_len)
+{
+ _spdk_blob_verify_md_op(blob);
+
+ return _spdk_blob_get_xattr_value(blob, name, value, value_len, false);
+}
+
struct spdk_xattr_names {
uint32_t count;
const char *names[0];
};
-int
-spdk_bs_md_get_xattr_names(struct spdk_blob *blob,
- struct spdk_xattr_names **names)
+static int
+_spdk_blob_get_xattr_names(struct spdk_xattr_tailq *xattrs, struct spdk_xattr_names **names)
{
struct spdk_xattr *xattr;
int count = 0;
- TAILQ_FOREACH(xattr, &blob->xattrs, link) {
+ TAILQ_FOREACH(xattr, xattrs, link) {
count++;
}
return -ENOMEM;
}
- TAILQ_FOREACH(xattr, &blob->xattrs, link) {
+ TAILQ_FOREACH(xattr, xattrs, link) {
(*names)->names[(*names)->count++] = xattr->name;
}
return 0;
}
+int
+spdk_blob_get_xattr_names(struct spdk_blob *blob, struct spdk_xattr_names **names)
+{
+ _spdk_blob_verify_md_op(blob);
+
+ return _spdk_blob_get_xattr_names(&blob->xattrs, names);
+}
+
uint32_t
spdk_xattr_names_get_count(struct spdk_xattr_names *names)
{
free(names);
}
-SPDK_LOG_REGISTER_TRACE_FLAG("blob", SPDK_TRACE_BLOB);
+struct spdk_bs_type
+spdk_bs_get_bstype(struct spdk_blob_store *bs)
+{
+ return bs->bstype;
+}
+
+void
+spdk_bs_set_bstype(struct spdk_blob_store *bs, struct spdk_bs_type bstype)
+{
+ memcpy(&bs->bstype, &bstype, sizeof(bstype));
+}
+
+bool
+spdk_blob_is_read_only(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+ return (blob->data_ro || blob->md_ro);
+}
+
+bool
+spdk_blob_is_snapshot(struct spdk_blob *blob)
+{
+ struct spdk_blob_list *snapshot_entry;
+
+ assert(blob != NULL);
+
+ TAILQ_FOREACH(snapshot_entry, &blob->bs->snapshots, link) {
+ if (snapshot_entry->id == blob->id) {
+ break;
+ }
+ }
+
+ if (snapshot_entry == NULL) {
+ return false;
+ }
+
+ return true;
+}
+
+bool
+spdk_blob_is_clone(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+
+ if (blob->parent_id != SPDK_BLOBID_INVALID) {
+ assert(spdk_blob_is_thin_provisioned(blob));
+ return true;
+ }
+
+ return false;
+}
+
+bool
+spdk_blob_is_thin_provisioned(struct spdk_blob *blob)
+{
+ assert(blob != NULL);
+ return !!(blob->invalid_flags & SPDK_BLOB_THIN_PROV);
+}
+
+spdk_blob_id
+spdk_blob_get_parent_snapshot(struct spdk_blob_store *bs, spdk_blob_id blob_id)
+{
+ struct spdk_blob_list *snapshot_entry = NULL;
+ struct spdk_blob_list *clone_entry = NULL;
+
+ TAILQ_FOREACH(snapshot_entry, &bs->snapshots, link) {
+ TAILQ_FOREACH(clone_entry, &snapshot_entry->clones, link) {
+ if (clone_entry->id == blob_id) {
+ return snapshot_entry->id;
+ }
+ }
+ }
+
+ return SPDK_BLOBID_INVALID;
+}
+
+int
+spdk_blob_get_clones(struct spdk_blob_store *bs, spdk_blob_id blobid, spdk_blob_id *ids,
+ size_t *count)
+{
+ struct spdk_blob_list *snapshot_entry, *clone_entry;
+ size_t n;
+
+ TAILQ_FOREACH(snapshot_entry, &bs->snapshots, link) {
+ if (snapshot_entry->id == blobid) {
+ break;
+ }
+ }
+ if (snapshot_entry == NULL) {
+ *count = 0;
+ return 0;
+ }
+
+ if (ids == NULL || *count < snapshot_entry->clone_count) {
+ *count = snapshot_entry->clone_count;
+ return -ENOMEM;
+ }
+ *count = snapshot_entry->clone_count;
+
+ n = 0;
+ TAILQ_FOREACH(clone_entry, &snapshot_entry->clones, link) {
+ ids[n++] = clone_entry->id;
+ }
+
+ return 0;
+}
+
+SPDK_LOG_REGISTER_COMPONENT("blob", SPDK_LOG_BLOB)
projects / ceph.git / blobdiff