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ee8af4e9f3
numam-spdk/lib/blob/blobstore.c
Jim Harris ee8af4e9f3 blob: fix _spdk_bs_load_ctx_fail ordering 
Finish the sequence first, before calling _spdk_bs_free().
Otherwise synchronous bs_devs (like we use in the unit
tests) cause the sequence memory to get freed via
_spdk_bs_free() and then we try to finish the sequence.

This eliminates the need for g_scheduler_delay and
_bs_flush_scheduler() in the blob unit tests.  But don't
remove them - they will be useful in upcoming unit tests
for queued persist operations.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I09aac3ae4d3a56ff8e04a5b822fcd6746f13afc3

Reviewed-on: https://review.gerrithub.io/401267
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Maciej Szwed <maciej.szwed@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
2018-02-27 10:58:29 -05:00

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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "spdk/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/bit_array.h"
#include "spdk/likely.h"
#include "spdk_internal/log.h"
#include "blobstore.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);
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)
{
return (num + divisor - 1) / divisor;
}
static void
_spdk_bs_claim_cluster(struct spdk_blob_store *bs, uint32_t cluster_num)
{
assert(cluster_num < spdk_bit_array_capacity(bs->used_clusters));
assert(spdk_bit_array_get(bs->used_clusters, cluster_num) == false);
assert(bs->num_free_clusters > 0);
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 >= blob->bs->total_clusters) {
/* 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(cluster_num < spdk_bit_array_capacity(bs->used_clusters));
assert(spdk_bit_array_get(bs->used_clusters, cluster_num) == true);
assert(bs->num_free_clusters < bs->total_clusters);
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);
}
void
spdk_blob_opts_init(struct spdk_blob_opts *opts)
{
opts->num_clusters = 0;
opts->thin_provision = false;
opts->xattrs.count = 0;
opts->xattrs.names = NULL;
opts->xattrs.ctx = NULL;
opts->xattrs.get_value = NULL;
}
static struct spdk_blob *
_spdk_blob_alloc(struct spdk_blob_store *bs, spdk_blob_id id)
{
struct spdk_blob *blob;
blob = calloc(1, sizeof(*blob));
if (!blob) {
return NULL;
}
blob->id = id;
blob->bs = bs;
blob->state = SPDK_BLOB_STATE_DIRTY;
blob->active.num_pages = 1;
blob->active.pages = calloc(1, sizeof(*blob->active.pages));
if (!blob->active.pages) {
free(blob);
return NULL;
}
blob->active.pages[0] = _spdk_bs_blobid_to_page(id);
TAILQ_INIT(&blob->xattrs);
TAILQ_INIT(&blob->xattrs_internal);
return blob;
}
static void
_spdk_xattrs_free(struct spdk_xattr_tailq *xattrs)
{
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->clean.clusters);
free(blob->active.pages);
free(blob->clean.pages);
_spdk_xattrs_free(&blob->xattrs);
_spdk_xattrs_free(&blob->xattrs_internal);
free(blob);
}
static int
_spdk_blob_mark_clean(struct spdk_blob *blob)
{
uint64_t *clusters = NULL;
uint32_t *pages = NULL;
assert(blob != NULL);
if (blob->active.num_clusters) {
assert(blob->active.clusters);
clusters = calloc(blob->active.num_clusters, sizeof(*blob->active.clusters));
if (!clusters) {
return -1;
}
memcpy(clusters, blob->active.clusters, blob->active.num_clusters * sizeof(*clusters));
}
if (blob->active.num_pages) {
assert(blob->active.pages);
pages = calloc(blob->active.num_pages, sizeof(*blob->active.pages));
if (!pages) {
free(clusters);
return -1;
}
memcpy(pages, blob->active.pages, blob->active.num_pages * sizeof(*pages));
}
free(blob->clean.clusters);
free(blob->clean.pages);
blob->clean.num_clusters = blob->active.num_clusters;
blob->clean.clusters = blob->active.clusters;
blob->clean.num_pages = blob->active.num_pages;
blob->clean.pages = blob->active.pages;
blob->active.clusters = clusters;
blob->active.pages = pages;
/* 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 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;
}
strncpy(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;
size_t cur_desc = 0;
void *tmp;
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_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;
unsigned int cluster_count = blob->active.num_clusters;
desc_extent = (struct spdk_blob_md_descriptor_extent *)desc;
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++) {
if (!spdk_bit_array_get(blob->bs->used_clusters,
desc_extent->extents[i].cluster_idx + j)) {
return -EINVAL;
}
cluster_count++;
}
}
if (cluster_count == 0) {
return -EINVAL;
}
tmp = realloc(blob->active.clusters, cluster_count * sizeof(uint64_t));
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++) {
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) {
int rc;
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;
rc = _spdk_blob_deserialize_xattr(blob,
(struct spdk_blob_md_descriptor_xattr *) desc, true);
if (rc != 0) {
return rc;
}
} else {
/* 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 */
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 int
_spdk_blob_parse(const struct spdk_blob_md_page *pages, uint32_t page_count,
struct spdk_blob *blob)
{
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);
/* 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);
rc = _spdk_blob_parse_page(page, blob);
if (rc != 0) {
return rc;
}
}
return 0;
}
static int
_spdk_blob_serialize_add_page(const struct spdk_blob *blob,
struct spdk_blob_md_page **pages,
uint32_t *page_count,
struct spdk_blob_md_page **last_page)
{
struct spdk_blob_md_page *page;
assert(pages != NULL);
assert(page_count != NULL);
if (*page_count == 0) {
assert(*pages == NULL);
*page_count = 1;
*pages = spdk_dma_malloc(SPDK_BS_PAGE_SIZE,
SPDK_BS_PAGE_SIZE,
NULL);
} else {
assert(*pages != NULL);
(*page_count)++;
*pages = spdk_dma_realloc(*pages,
SPDK_BS_PAGE_SIZE * (*page_count),
SPDK_BS_PAGE_SIZE,
NULL);
}
if (*pages == NULL) {
*page_count = 0;
*last_page = NULL;
return -ENOMEM;
}
page = &(*pages)[*page_count - 1];
memset(page, 0, sizeof(*page));
page->id = blob->id;
page->sequence_num = *page_count - 1;
page->next = SPDK_INVALID_MD_PAGE;
*last_page = page;
return 0;
}
/* Transform the in-memory representation 'xattr' into an on-disk xattr descriptor.
* Update required_sz on both success and failure.
*
*/
static int
_spdk_blob_serialize_xattr(const struct spdk_xattr *xattr,
uint8_t *buf, size_t buf_sz,
size_t *required_sz, bool internal)
{
struct spdk_blob_md_descriptor_xattr *desc;
*required_sz = sizeof(struct spdk_blob_md_descriptor_xattr) +
strlen(xattr->name) +
xattr->value_len;
if (buf_sz < *required_sz) {
return -1;
}
desc = (struct spdk_blob_md_descriptor_xattr *)buf;
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) +
xattr->value_len;
desc->name_length = strlen(xattr->name);
desc->value_length = xattr->value_len;
memcpy(desc->name, xattr->name, desc->name_length);
memcpy((void *)((uintptr_t)desc->name + desc->name_length),
xattr->value,
desc->value_length);
return 0;
}
static void
_spdk_blob_serialize_extent(const struct spdk_blob *blob,
uint64_t start_cluster, uint64_t *next_cluster,
uint8_t *buf, size_t buf_sz)
{
struct spdk_blob_md_descriptor_extent *desc;
size_t cur_sz;
uint64_t i, extent_idx;
uint32_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 (buf_sz < cur_sz) {
*next_cluster = start_cluster;
return;
}
desc = (struct spdk_blob_md_descriptor_extent *)buf;
desc->type = SPDK_MD_DESCRIPTOR_TYPE_EXTENT;
lba_per_cluster = _spdk_bs_cluster_to_lba(blob->bs, 1);
lba = blob->active.clusters[start_cluster];
lba_count = lba_per_cluster;
extent_idx = 0;
for (i = start_cluster + 1; i < blob->active.num_clusters; i++) {
if ((lba + lba_count) == blob->active.clusters[i]) {
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;
extent_idx++;
cur_sz += sizeof(desc->extents[extent_idx]);
if (buf_sz < cur_sz) {
/* If we ran out of buffer space, return */
desc->length = sizeof(desc->extents[0]) * extent_idx;
*next_cluster = i;
return;
}
lba = blob->active.clusters[i];
lba_count = lba_per_cluster;
}
desc->extents[extent_idx].cluster_idx = lba / lba_per_cluster;
desc->extents[extent_idx].length = lba_count / lba_per_cluster;
extent_idx++;
desc->length = sizeof(desc->extents[0]) * extent_idx;
*next_cluster = blob->active.num_clusters;
return;
}
static void
_spdk_blob_serialize_flags(const struct spdk_blob *blob,
uint8_t *buf, size_t *buf_sz)
{
struct spdk_blob_md_descriptor_flags *desc;
/*
* Flags get serialized first, so we should always have room for the flags
* descriptor.
*/
assert(*buf_sz >= sizeof(*desc));
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;
*buf_sz -= sizeof(*desc);
}
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;
TAILQ_FOREACH(xattr, xattrs, link) {
size_t required_sz = 0;
rc = _spdk_blob_serialize_xattr(xattr,
*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_dma_free(*pages);
*pages = NULL;
*page_count = 0;
return rc;
}
*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, internal);
if (rc < 0) {
spdk_dma_free(*pages);
*pages = NULL;
*page_count = 0;
return -1;
}
}
*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 */
last_cluster = 0;
while (last_cluster < blob->active.num_clusters) {
_spdk_blob_serialize_extent(blob, last_cluster, &last_cluster,
buf, remaining_sz);
if (last_cluster == blob->active.num_clusters) {
break;
}
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);
}
return 0;
}
struct spdk_blob_load_ctx {
struct spdk_blob *blob;
struct spdk_blob_md_page *pages;
uint32_t num_pages;
spdk_bs_sequence_cpl cb_fn;
void *cb_arg;
};
static uint32_t
_spdk_blob_md_page_calc_crc(void *page)
{
uint32_t crc;
crc = BLOB_CRC32C_INITIAL;
crc = spdk_crc32c_update(page, SPDK_BS_PAGE_SIZE - 4, crc);
crc ^= BLOB_CRC32C_INITIAL;
return crc;
}
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;
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_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);
if (rc) {
_spdk_blob_free(blob);
ctx->cb_fn(seq, NULL, rc);
spdk_dma_free(ctx->pages);
free(ctx);
return;
}
if (spdk_blob_is_thin_provisioned(blob) == true) {
blob->back_bs_dev = spdk_bs_create_zeroes_dev();
}
_spdk_blob_mark_clean(blob);
ctx->cb_fn(seq, ctx->cb_arg, rc);
/* Free the memory */
spdk_dma_free(ctx->pages);
free(ctx);
}
/* Load a blob from disk given a blobid */
static void
_spdk_blob_load(spdk_bs_sequence_t *seq, struct spdk_blob *blob,
spdk_bs_sequence_cpl cb_fn, void *cb_arg)
{
struct spdk_blob_load_ctx *ctx;
struct spdk_blob_store *bs;
uint32_t page_num;
uint64_t lba;
_spdk_blob_verify_md_op(blob);
bs = blob->bs;
ctx = calloc(1, sizeof(*ctx));
if (!ctx) {
cb_fn(seq, cb_arg, -ENOMEM);
return;
}
ctx->blob = blob;
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);
return;
}
ctx->num_pages = 1;
ctx->cb_fn = cb_fn;
ctx->cb_arg = cb_arg;
page_num = _spdk_bs_blobid_to_page(blob->id);
lba = _spdk_bs_page_to_lba(blob->bs, bs->md_start + page_num);
blob->state = SPDK_BLOB_STATE_LOADING;
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_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;
if (bserrno == 0) {
_spdk_blob_mark_clean(blob);
}
/* Call user callback */
ctx->cb_fn(seq, ctx->cb_arg, bserrno);
/* Free the memory */
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_store *bs = blob->bs;
void *tmp;
size_t i;
/* Release all clusters that were truncated */
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]);
/* 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) {
free(blob->active.clusters);
blob->active.clusters = NULL;
blob->active.cluster_array_size = 0;
} else {
tmp = realloc(blob->active.clusters, sizeof(uint64_t) * blob->active.num_clusters);
assert(tmp != NULL);
blob->active.clusters = tmp;
blob->active.cluster_array_size = blob->active.num_clusters;
}
_spdk_blob_persist_complete(seq, ctx, bserrno);
}
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_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 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. */
/* 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_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_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 zeroed.
*/
for (i = 1; i < blob->clean.num_pages; i++) {
spdk_bit_array_clear(bs->used_md_pages, blob->clean.pages[i]);
}
if (blob->active.num_pages == 0) {
uint32_t page_num;
page_num = _spdk_bs_blobid_to_page(blob->id);
spdk_bit_array_clear(bs->used_md_pages, page_num);
}
/* Move on to unmapping clusters */
_spdk_blob_persist_unmap_clusters(seq, ctx, 0);
}
static void
_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_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_zero_pages_cpl, ctx);
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 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_write_zeroes_dev(batch, lba, lba_count);
}
/* The first page will only be zeroed if this is a delete. */
if (blob->active.num_pages == 0) {
uint32_t page_num;
/* The first page in the metadata goes where the blobid indicates */
page_num = _spdk_bs_blobid_to_page(blob->id);
lba = _spdk_bs_page_to_lba(bs, bs->md_start + page_num);
spdk_bs_batch_write_zeroes_dev(batch, lba, lba_count);
}
spdk_bs_batch_close(batch);
}
static void
_spdk_blob_persist_write_page_root(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_store *bs = blob->bs;
uint64_t lba;
uint32_t lba_count;
struct spdk_blob_md_page *page;
if (blob->active.num_pages == 0) {
/* Move on to the next step */
_spdk_blob_persist_zero_pages(seq, ctx, 0);
return;
}
lba_count = _spdk_bs_byte_to_lba(bs, sizeof(*page));
page = &ctx->pages[0];
/* 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_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_store *bs = blob->bs;
uint64_t lba;
uint32_t lba_count;
struct spdk_blob_md_page *page;
spdk_bs_batch_t *batch;
size_t i;
/* 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.
*/
lba_count = _spdk_bs_byte_to_lba(bs, sizeof(*page));
batch = spdk_bs_sequence_to_batch(seq, _spdk_blob_persist_write_page_root, ctx);
/* This starts at 1. The root page is not written until
* all of the others are finished
*/
for (i = 1; i < blob->active.num_pages; i++) {
page = &ctx->pages[i];
assert(page->sequence_num == i);
lba = _spdk_bs_page_to_lba(bs, bs->md_start + blob->active.pages[i]);
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)
{
uint64_t i;
uint64_t *tmp;
uint64_t lfc; /* lowest free cluster */
uint64_t num_clusters;
struct spdk_blob_store *bs;
bs = blob->bs;
_spdk_blob_verify_md_op(blob);
if (blob->active.num_clusters == sz) {
return 0;
}
if (blob->active.num_clusters < blob->active.cluster_array_size) {
/* If this blob was resized to be larger, then smaller, then
* larger without syncing, then the cluster array already
* contains spare assigned clusters we can use.
*/
num_clusters = spdk_min(blob->active.cluster_array_size,
sz);
} else {
num_clusters = blob->active.num_clusters;
}
/* Do two passes - one to verify that we can obtain enough clusters
* and another to actually claim them.
*/
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 >= bs->total_clusters) {
/* No more free clusters. Cannot satisfy the request */
return -ENOSPC;
}
lfc++;
}
}
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) {
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;
}
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;
}
static void
_spdk_blob_persist_start(struct spdk_blob_persist_ctx *ctx)
{
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;
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;
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) {
_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) {
_spdk_blob_persist_complete(seq, ctx, -ENOMEM);
return;
}
/* Assign this metadata to pages. This requires two passes -
* one to verify that there are enough pages and a second
* to actually claim them. */
page_num = 0;
/* 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_blob_persist_complete(seq, ctx, -ENOMEM);
return;
}
page_num++;
}
page_num = 0;
blob->active.pages[0] = _spdk_bs_blobid_to_page(blob->id);
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_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);
}
/* 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;
}
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;
_spdk_blob_persist_start(ctx);
}
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;
};
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);
}
}
spdk_dma_free(ctx->buf);
free(ctx);
}
static void
_spdk_blob_insert_cluster_cpl(void *cb_arg, int bserrno)
{
struct spdk_blob_copy_cluster_ctx *ctx = cb_arg;
if (bserrno) {
uint32_t cluster_number;
if (bserrno == -EEXIST) {
/* The metadata insert failed because another thread
* allocated the cluster first. Free our cluster
* but continue without error. */
bserrno = 0;
}
cluster_number = _spdk_bs_page_to_cluster(ctx->blob->bs, ctx->page);
_spdk_bs_release_cluster(ctx->blob->bs, cluster_number);
}
spdk_bs_sequence_finish(ctx->seq, bserrno);
}
static void
_spdk_blob_write_copy_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
struct spdk_blob_copy_cluster_ctx *ctx = cb_arg;
uint32_t cluster_number;
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_blob_write_copy(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
struct spdk_blob_copy_cluster_ctx *ctx = cb_arg;
if (bserrno != 0) {
/* The read failed, so jump to the final completion handler */
spdk_bs_sequence_finish(seq, bserrno);
return;
}
/* 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);
}
static void
_spdk_bs_allocate_and_copy_cluster(struct spdk_blob *blob,
struct spdk_io_channel *_ch,
uint64_t offset, spdk_bs_user_op_t *op)
{
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;
ch = spdk_io_channel_get_ctx(_ch);
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;
}
/* Round the page offset down to the first page in the cluster */
cluster_start_page = _spdk_bs_page_to_cluster_start(blob, offset);
/* Calculate which index in the metadata cluster array the corresponding
* cluster is supposed to be at. */
cluster_number = _spdk_bs_page_to_cluster(blob->bs, cluster_start_page);
ctx = calloc(1, sizeof(*ctx));
if (!ctx) {
spdk_bs_user_op_abort(op);
return;
}
assert(blob->bs->cluster_sz % blob->back_bs_dev->blocklen == 0);
ctx->blob = blob;
ctx->page = cluster_start_page;
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;
}
/* Queue the user op to block other incoming operations */
TAILQ_INSERT_TAIL(&ch->need_cluster_alloc, op, link);
/* 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);
}
static void
_spdk_blob_calculate_lba_and_lba_count(struct spdk_blob *blob, uint64_t page, uint64_t length,
uint64_t *lba, uint32_t *lba_count)
{
*lba_count = _spdk_bs_page_to_lba(blob->bs, length);
if (!_spdk_bs_page_is_allocated(blob, page)) {
assert(blob->back_bs_dev != NULL);
*lba = _spdk_bs_dev_page_to_lba(blob->back_bs_dev, page);
*lba_count = _spdk_bs_blob_lba_to_back_dev_lba(blob, *lba_count);
} else {
*lba = _spdk_bs_blob_page_to_lba(blob, page);
}
}
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)
{
spdk_bs_batch_t *batch;
struct spdk_bs_cpl cpl;
uint64_t op_length;
uint8_t *buf;
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;
batch = spdk_bs_batch_open(ch, &cpl);
if (!batch) {
cb_fn(cb_arg, -ENOMEM);
return;
}
buf = payload;
while (length > 0) {
op_length = spdk_min(length, _spdk_bs_num_pages_to_cluster_boundary(blob, offset));
switch (op_type) {
case SPDK_BLOB_READ:
spdk_bs_batch_read_blob(batch, blob, buf, offset, op_length);
break;
case SPDK_BLOB_WRITE:
spdk_bs_batch_write_blob(batch, blob, buf, offset, op_length);
break;
case SPDK_BLOB_UNMAP:
spdk_bs_batch_unmap_blob(batch, blob, offset, op_length);
break;
case SPDK_BLOB_WRITE_ZEROES:
spdk_bs_batch_write_zeroes_blob(batch, blob, offset, op_length);
break;
case SPDK_BLOB_READV:
case SPDK_BLOB_WRITEV:
SPDK_ERRLOG("readv/write not valid for %s\n", __func__);
break;
}
length -= op_length;
offset += op_length;
if (op_type == SPDK_BLOB_WRITE || op_type == SPDK_BLOB_READ) {
buf += op_length * SPDK_BS_PAGE_SIZE;
}
}
spdk_bs_batch_close(batch);
}
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);
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_page_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_page_is_allocated(blob, offset)) {
/* Write to the blob */
spdk_bs_batch_t *batch;
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;
batch = spdk_bs_batch_open(_ch, &cpl);
if (!batch) {
cb_fn(cb_arg, -ENOMEM);
return;
}
if (_spdk_bs_page_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_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)
{
assert(blob != NULL);
if (blob->data_ro && op_type != SPDK_BLOB_READ) {
cb_fn(cb_arg, -EPERM);
return;
}
if (offset + length > blob->active.num_clusters * blob->bs->pages_per_cluster) {
cb_fn(cb_arg, -EINVAL);
return;
}
if (length <= _spdk_bs_num_pages_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 page_offset;
uint64_t pages_remaining;
uint64_t pages_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 page_count, pages_to_boundary, page_offset;
uint64_t byte_count;
if (bserrno != 0 || ctx->pages_remaining == 0) {
ctx->cb_fn(ctx->cb_arg, bserrno);
free(ctx);
return;
}
page_offset = ctx->page_offset;
pages_to_boundary = _spdk_bs_num_pages_to_cluster_boundary(blob, page_offset);
page_count = spdk_min(ctx->pages_remaining, pages_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->pages_done * sizeof(struct spdk_blob_md_page);
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 = page_count * sizeof(struct spdk_blob_md_page);
iov = &ctx->iov[0];
iovcnt = 0;
while (byte_count > 0) {
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->page_offset += page_count;
ctx->pages_done += page_count;
ctx->pages_remaining -= page_count;
iov = &ctx->iov[0];
if (ctx->read) {
spdk_blob_io_readv(ctx->blob, ctx->channel, iov, iovcnt, page_offset,
page_count, _spdk_rw_iov_split_next, ctx);
} else {
spdk_blob_io_writev(ctx->blob, ctx->channel, iov, iovcnt, page_offset,
page_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 > blob->active.num_clusters * blob->bs->pages_per_cluster) {
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_pages_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 (read) {
spdk_bs_sequence_t *seq;
seq = spdk_bs_sequence_start(_channel, &cpl);
if (!seq) {
cb_fn(cb_arg, -ENOMEM);
return;
}
if (_spdk_bs_page_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_page_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->page_offset = offset;
ctx->pages_remaining = length;
ctx->pages_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);
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);
}
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 void
_spdk_bs_free(struct spdk_blob_store *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));
}
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 struct spdk_blob_store *
_spdk_bs_alloc(struct spdk_bs_dev *dev, struct spdk_bs_opts *opts)
{
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_ERRLOG("Device size %" PRIu64 " is smaller than cluster size %" PRIu32 "\n",
dev_size, opts->cluster_sz);
return NULL;
}
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 NULL;
}
bs = calloc(1, sizeof(struct spdk_blob_store));
if (!bs) {
return NULL;
}
TAILQ_INIT(&bs->blobs);
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);
if (bs->used_clusters == NULL) {
free(bs);
return NULL;
}
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));
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);
return NULL;
}
return bs;
}
/* 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;
};
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 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_complete(spdk_bs_sequence_t *seq, struct spdk_bs_load_ctx *ctx, int bserrno)
{
spdk_dma_free(ctx->super);
spdk_dma_free(ctx->mask);
free(ctx);
spdk_bs_sequence_finish(seq, bserrno);
}
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;
uint32_t i, j;
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_bit_array_resize(&ctx->bs->used_blobids, ctx->mask->length);
if (rc < 0) {
spdk_dma_free(ctx->mask);
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
return;
}
for (i = 0; i < ctx->mask->length / 8; i++) {
uint8_t segment = ctx->mask->mask[i];
for (j = 0; segment; j++) {
if (segment & 1U) {
spdk_bit_array_set(ctx->bs->used_blobids, (i * 8) + j);
}
segment >>= 1U;
}
}
_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;
uint32_t i, j;
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_bit_array_resize(&ctx->bs->used_clusters, ctx->bs->total_clusters);
if (rc < 0) {
spdk_dma_free(ctx->mask);
_spdk_bs_load_ctx_fail(seq, ctx, -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--;
}
segment >>= 1U;
}
}
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;
uint32_t i, j;
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_bit_array_resize(&ctx->bs->used_md_pages, ctx->mask->length);
if (rc < 0) {
spdk_dma_free(ctx->mask);
_spdk_bs_load_ctx_fail(seq, ctx, -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;
}
}
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_write_super_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;
/* 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;
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++) {
spdk_bit_array_set(bs->used_clusters, desc_extent->extents[i].cluster_idx + j);
if (bs->num_free_clusters == 0) {
return -1;
}
bs->num_free_clusters--;
cluster_count++;
}
}
if (cluster_count == 0) {
return -1;
}
} 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 -1;
}
/* 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, int bserrno)
{
struct spdk_bs_load_ctx *ctx = cb_arg;
int rc;
if (bserrno != 0) {
_spdk_bs_load_ctx_fail(seq, ctx, -EIO);
return;
}
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;
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;
}
/* 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 / SPDK_BS_PAGE_SIZE;
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->clean == 0) {
_spdk_bs_recover(seq, ctx, 0);
} else if (ctx->super->used_blobid_mask_len == 0) {
/*
* Metadata is clean, but this is an old metadata format without
* a blobid mask. Clear the clean bit and then build the masks
* using _spdk_bs_recover.
*/
ctx->super->clean = 0;
_spdk_bs_write_super(seq, ctx->bs, ctx->super, _spdk_bs_recover, ctx);
} else {
ctx->super->clean = 0;
_spdk_bs_write_super(seq, ctx->bs, ctx->super, _spdk_bs_load_write_super_cpl, 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 = {};
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Loading blobstore from dev %p\n", dev);
if (o) {
opts = *o;
} else {
spdk_bs_opts_init(&opts);
}
if (opts.max_md_ops == 0 || opts.max_channel_ops == 0) {
cb_fn(cb_arg, NULL, -EINVAL);
return;
}
bs = _spdk_bs_alloc(dev, &opts);
if (!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;
ctx->is_load = true;
/* 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);
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_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;
}
bs = _spdk_bs_alloc(dev, &opts);
if (!bs) {
dev->destroy(dev);
cb_fn(cb_arg, NULL, -ENOMEM);
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);
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;
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->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 destuction, 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 */
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);
}
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_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_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;
}
}
return 0;
}
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;
}
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)
{
struct spdk_blob *blob;
uint32_t page_idx;
struct spdk_bs_cpl cpl;
struct spdk_blob_opts opts_default;
spdk_bs_sequence_t *seq;
spdk_blob_id id;
int rc;
assert(spdk_get_thread() == bs->md_thread);
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);
return;
}
spdk_bit_array_set(bs->used_blobids, page_idx);
spdk_bit_array_set(bs->used_md_pages, page_idx);
id = _spdk_bs_page_to_blobid(page_idx);
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Creating blob with id %lu at page %u\n", id, page_idx);
blob = _spdk_blob_alloc(bs, id);
if (!blob) {
cb_fn(cb_arg, 0, -ENOMEM);
return;
}
if (!opts) {
spdk_blob_opts_init(&opts_default);
opts = &opts_default;
}
rc = _spdk_blob_set_xattrs(blob, &opts->xattrs, false);
if (rc < 0) {
_spdk_blob_free(blob);
cb_fn(cb_arg, 0, rc);
return;
}
if (opts->thin_provision) {
_spdk_blob_set_thin_provision(blob);
}
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_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_blob_free(blob);
cb_fn(cb_arg, 0, -ENOMEM);
return;
}
_spdk_blob_persist(seq, blob, _spdk_bs_create_blob_cpl, blob);
}
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_ext(bs, NULL, cb_fn, cb_arg);
}
/* END spdk_bs_create_blob */
/* START spdk_blob_resize */
int
spdk_blob_resize(struct spdk_blob *blob, uint64_t sz)
{
int rc;
_spdk_blob_verify_md_op(blob);
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Resizing blob %lu to %lu clusters\n", blob->id, sz);
if (blob->md_ro) {
return -EPERM;
}
if (sz == blob->active.num_clusters) {
return 0;
}
rc = _spdk_resize_blob(blob, sz);
if (rc < 0) {
return rc;
}
return 0;
}
/* END spdk_blob_resize */
/* START spdk_bs_delete_blob */
static void
_spdk_bs_delete_close_cpl(void *cb_arg, int bserrno)
{
spdk_bs_sequence_t *seq = cb_arg;
spdk_bs_sequence_finish(seq, bserrno);
}
static void
_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;
}
/*
* 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_persist(seq, blob, _spdk_bs_delete_persist_cpl, blob);
}
void
spdk_bs_delete_blob(struct spdk_blob_store *bs, spdk_blob_id blobid,
spdk_blob_op_complete cb_fn, void *cb_arg)
{
struct spdk_bs_cpl cpl;
spdk_bs_sequence_t *seq;
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Deleting blob %lu\n", blobid);
assert(spdk_get_thread() == bs->md_thread);
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(bs->md_channel, &cpl);
if (!seq) {
cb_fn(cb_arg, -ENOMEM);
return;
}
spdk_bs_open_blob(bs, blobid, _spdk_bs_delete_open_cpl, seq);
}
/* END spdk_bs_delete_blob */
/* START spdk_bs_open_blob */
static void
_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_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_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) {
blob->open_ref++;
cb_fn(cb_arg, blob, 0);
return;
}
blob = _spdk_blob_alloc(bs, blobid);
if (!blob) {
cb_fn(cb_arg, NULL, -ENOMEM);
return;
}
cpl.type = SPDK_BS_CPL_TYPE_BLOB_HANDLE;
cpl.u.blob_handle.cb_fn = cb_fn;
cpl.u.blob_handle.cb_arg = cb_arg;
cpl.u.blob_handle.blob = blob;
seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
if (!seq) {
_spdk_blob_free(blob);
cb_fn(cb_arg, NULL, -ENOMEM);
return;
}
_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 */
static void
_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);
}
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;
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_blob_persist(seq, blob, _spdk_blob_sync_md_cpl, blob);
}
void
spdk_blob_sync_md(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
{
_spdk_blob_verify_md_op(blob);
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;
}
_spdk_blob_sync_md(blob, cb_fn, cb_arg);
}
/* 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;
}
ctx->blob->state = SPDK_BLOB_STATE_DIRTY;
_spdk_blob_sync_md(ctx->blob, _spdk_blob_insert_cluster_msg_cb, ctx);
}
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_blob_close */
static void
_spdk_blob_close_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
{
struct spdk_blob *blob = cb_arg;
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);
}
}
spdk_bs_sequence_finish(seq, bserrno);
}
void spdk_blob_close(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
{
struct spdk_bs_cpl cpl;
spdk_bs_sequence_t *seq;
_spdk_blob_verify_md_op(blob);
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Closing blob %lu\n", blob->id);
if (blob->open_ref == 0) {
cb_fn(cb_arg, -EBADF);
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(blob->bs->md_channel, &cpl);
if (!seq) {
cb_fn(cb_arg, -ENOMEM);
return;
}
/* Sync metadata */
_spdk_blob_persist(seq, blob, _spdk_blob_close_cpl, blob);
}
/* END spdk_blob_close */
struct spdk_io_channel *spdk_bs_alloc_io_channel(struct spdk_blob_store *bs)
{
return spdk_get_io_channel(bs);
}
void spdk_bs_free_io_channel(struct spdk_io_channel *channel)
{
spdk_put_io_channel(channel);
}
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)
{
_spdk_blob_request_submit_op(blob, channel, payload, offset, length, cb_fn, cb_arg,
SPDK_BLOB_READ);
}
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_iov(blob, channel, iov, iovcnt, offset, length, cb_fn, cb_arg, false);
}
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_iov(blob, channel, iov, iovcnt, offset, length, cb_fn, cb_arg, true);
}
void spdk_bs_io_unmap_blob(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_io_unmap(blob, channel, offset, length, cb_fn, cb_arg);
}
void spdk_bs_io_write_zeroes_blob(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_io_write_zeroes(blob, channel, offset, length, cb_fn, cb_arg);
}
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)
{
spdk_blob_io_write(blob, channel, payload, offset, length, cb_fn, cb_arg);
}
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)
{
spdk_blob_io_read(blob, channel, payload, offset, length, cb_fn, cb_arg);
}
void spdk_bs_io_writev_blob(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_io_writev(blob, channel, iov, iovcnt, offset, length, cb_fn, cb_arg);
}
void spdk_bs_io_readv_blob(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_io_readv(blob, channel, iov, iovcnt, offset, length, cb_fn, cb_arg);
}
struct spdk_bs_iter_ctx {
int64_t page_num;
struct spdk_blob_store *bs;
spdk_blob_op_with_handle_complete cb_fn;
void *cb_arg;
};
static void
_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);
free(ctx);
return;
}
ctx->page_num++;
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 = _spdk_bs_page_to_blobid(ctx->page_num);
spdk_bs_open_blob(bs, id, _spdk_bs_iter_cpl, ctx);
}
void
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;
ctx = calloc(1, sizeof(*ctx));
if (!ctx) {
cb_fn(cb_arg, NULL, -ENOMEM);
return;
}
ctx->page_num = -1;
ctx->bs = bs;
ctx->cb_fn = cb_fn;
ctx->cb_arg = cb_arg;
_spdk_bs_iter_cpl(ctx, NULL, -1);
}
static void
_spdk_bs_iter_close_cpl(void *cb_arg, int bserrno)
{
struct spdk_bs_iter_ctx *ctx = cb_arg;
_spdk_bs_iter_cpl(ctx, NULL, -1);
}
void
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;
assert(blob != NULL);
ctx = calloc(1, sizeof(*ctx));
if (!ctx) {
cb_fn(cb_arg, NULL, -ENOMEM);
return;
}
ctx->page_num = _spdk_bs_blobid_to_page(blob->id);
ctx->bs = bs;
ctx->cb_fn = cb_fn;
ctx->cb_arg = cb_arg;
/* Close the existing blob */
spdk_blob_close(blob, _spdk_bs_iter_close_cpl, ctx);
}
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_tailq *xattrs;
struct spdk_xattr *xattr;
_spdk_blob_verify_md_op(blob);
if (blob->md_ro) {
return -EPERM;
}
if (internal) {
xattrs = &blob->xattrs_internal;
blob->invalid_flags |= SPDK_BLOB_INTERNAL_XATTR;
} else {
xattrs = &blob->xattrs;
}
TAILQ_FOREACH(xattr, xattrs, link) {
if (!strcmp(name, xattr->name)) {
free(xattr->value);
xattr->value_len = value_len;
xattr->value = malloc(value_len);
memcpy(xattr->value, value, value_len);
blob->state = SPDK_BLOB_STATE_DIRTY;
return 0;
}
}
xattr = calloc(1, sizeof(*xattr));
if (!xattr) {
return -1;
}
xattr->name = strdup(name);
xattr->value_len = value_len;
xattr->value = malloc(value_len);
memcpy(xattr->value, value, value_len);
TAILQ_INSERT_TAIL(xattrs, xattr, link);
blob->state = SPDK_BLOB_STATE_DIRTY;
return 0;
}
int
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;
_spdk_blob_verify_md_op(blob);
if (blob->md_ro) {
return -EPERM;
}
xattrs = internal ? &blob->xattrs_internal : &blob->xattrs;
TAILQ_FOREACH(xattr, xattrs, link) {
if (!strcmp(name, xattr->name)) {
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;
}
}
return -ENOENT;
}
int
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;
_spdk_blob_verify_md_op(blob);
xattrs = internal ? &blob->xattrs_internal : &blob->xattrs;
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)
{
return _spdk_blob_get_xattr_value(blob, name, value, value_len, false);
}
struct spdk_xattr_names {
uint32_t count;
const char *names[0];
};
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, xattrs, link) {
count++;
}
*names = calloc(1, sizeof(struct spdk_xattr_names) + count * sizeof(char *));
if (*names == NULL) {
return -ENOMEM;
}
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)
{
assert(names != NULL);
return names->count;
}
const char *
spdk_xattr_names_get_name(struct spdk_xattr_names *names, uint32_t index)
{
if (index >= names->count) {
return NULL;
}
return names->names[index];
}
void
spdk_xattr_names_free(struct spdk_xattr_names *names)
{
free(names);
}
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));
}
SPDK_LOG_REGISTER_COMPONENT("blob", SPDK_LOG_BLOB)
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