bb63fe6fc3
Scan-build has a real issue with reallocs. The original error from latest version of scan-build is rather complicated, but it can be greatly simplified with the following change: > diff --git a/lib/blob/blobstore.c b/lib/blob/blobstore.c > index 7580c9dd2..6a594edf3 100644 > --- a/lib/blob/blobstore.c > +++ b/lib/blob/blobstore.c > @@ -1147,8 +1147,9 @@ > _spdk_blob_persist_clear_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int > } else if (blob->active.num_clusters != blob->active.cluster_array_size) { > 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; > + ctx->blob->active.clusters = tmp; > + assert(ctx->blob->active.clusters[0] != 14213); > + ctx->blob->active.cluster_array_size = ctx->blob->active.num_clusters; > } > > _spdk_blob_persist_complete(seq, ctx, bserrno); > ``` Scan-build will then complain: blobstore.c:1151:10: warning: Use of memory after it is freed assert(ctx->blob->active.clusters[0] != 14213); Asserting blob == ctx->blob, blob->active.clusters == ctx->..., or even tmp != blob->active.clusters doesn't work, so use the last resort scan-build weapon - #ifdef __clang_analyzer__. The realloc in this case is just down-sizing a buffer to save some memory. For scan-build, just don't do it. This finally silences all scan-build false positives. Change-Id: Ib88ea145370f5035eedd2412e98ee61f96ad1915 Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/462868 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
6352 lines
166 KiB
C
6352 lines
166 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "spdk/stdinc.h"
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#include "spdk/blob.h"
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#include "spdk/crc32.h"
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#include "spdk/env.h"
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#include "spdk/queue.h"
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#include "spdk/thread.h"
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#include "spdk/bit_array.h"
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#include "spdk/likely.h"
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#include "spdk/util.h"
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#include "spdk_internal/assert.h"
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#include "spdk_internal/log.h"
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#include "blobstore.h"
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#define BLOB_CRC32C_INITIAL 0xffffffffUL
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static int spdk_bs_register_md_thread(struct spdk_blob_store *bs);
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static int spdk_bs_unregister_md_thread(struct spdk_blob_store *bs);
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static void _spdk_blob_close_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno);
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static void _spdk_blob_insert_cluster_on_md_thread(struct spdk_blob *blob, uint32_t cluster_num,
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uint64_t cluster, spdk_blob_op_complete cb_fn, void *cb_arg);
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static int _spdk_blob_set_xattr(struct spdk_blob *blob, const char *name, const void *value,
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uint16_t value_len, bool internal);
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static int _spdk_blob_get_xattr_value(struct spdk_blob *blob, const char *name,
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const void **value, size_t *value_len, bool internal);
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static int _spdk_blob_remove_xattr(struct spdk_blob *blob, const char *name, bool internal);
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static void
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_spdk_blob_verify_md_op(struct spdk_blob *blob)
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{
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assert(blob != NULL);
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assert(spdk_get_thread() == blob->bs->md_thread);
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assert(blob->state != SPDK_BLOB_STATE_LOADING);
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}
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static struct spdk_blob_list *
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_spdk_bs_get_snapshot_entry(struct spdk_blob_store *bs, spdk_blob_id blobid)
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{
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struct spdk_blob_list *snapshot_entry = NULL;
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TAILQ_FOREACH(snapshot_entry, &bs->snapshots, link) {
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if (snapshot_entry->id == blobid) {
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break;
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}
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}
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return snapshot_entry;
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}
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static void
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_spdk_bs_claim_cluster(struct spdk_blob_store *bs, uint32_t cluster_num)
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{
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assert(cluster_num < spdk_bit_array_capacity(bs->used_clusters));
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assert(spdk_bit_array_get(bs->used_clusters, cluster_num) == false);
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assert(bs->num_free_clusters > 0);
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SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Claiming cluster %u\n", cluster_num);
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spdk_bit_array_set(bs->used_clusters, cluster_num);
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bs->num_free_clusters--;
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}
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static int
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_spdk_blob_insert_cluster(struct spdk_blob *blob, uint32_t cluster_num, uint64_t cluster)
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{
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uint64_t *cluster_lba = &blob->active.clusters[cluster_num];
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_spdk_blob_verify_md_op(blob);
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if (*cluster_lba != 0) {
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return -EEXIST;
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}
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*cluster_lba = _spdk_bs_cluster_to_lba(blob->bs, cluster);
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return 0;
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}
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static int
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_spdk_bs_allocate_cluster(struct spdk_blob *blob, uint32_t cluster_num,
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uint64_t *lowest_free_cluster, bool update_map)
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{
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pthread_mutex_lock(&blob->bs->used_clusters_mutex);
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*lowest_free_cluster = spdk_bit_array_find_first_clear(blob->bs->used_clusters,
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*lowest_free_cluster);
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if (*lowest_free_cluster == UINT32_MAX) {
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/* No more free clusters. Cannot satisfy the request */
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pthread_mutex_unlock(&blob->bs->used_clusters_mutex);
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return -ENOSPC;
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}
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SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Claiming cluster %lu for blob %lu\n", *lowest_free_cluster, blob->id);
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_spdk_bs_claim_cluster(blob->bs, *lowest_free_cluster);
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pthread_mutex_unlock(&blob->bs->used_clusters_mutex);
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if (update_map) {
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_spdk_blob_insert_cluster(blob, cluster_num, *lowest_free_cluster);
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}
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return 0;
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}
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static void
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_spdk_bs_release_cluster(struct spdk_blob_store *bs, uint32_t cluster_num)
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{
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assert(cluster_num < spdk_bit_array_capacity(bs->used_clusters));
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assert(spdk_bit_array_get(bs->used_clusters, cluster_num) == true);
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assert(bs->num_free_clusters < bs->total_clusters);
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SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Releasing cluster %u\n", cluster_num);
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pthread_mutex_lock(&bs->used_clusters_mutex);
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spdk_bit_array_clear(bs->used_clusters, cluster_num);
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bs->num_free_clusters++;
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pthread_mutex_unlock(&bs->used_clusters_mutex);
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}
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static void
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_spdk_blob_xattrs_init(struct spdk_blob_xattr_opts *xattrs)
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{
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xattrs->count = 0;
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xattrs->names = NULL;
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xattrs->ctx = NULL;
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xattrs->get_value = NULL;
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}
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void
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spdk_blob_opts_init(struct spdk_blob_opts *opts)
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{
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opts->num_clusters = 0;
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opts->thin_provision = false;
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_spdk_blob_xattrs_init(&opts->xattrs);
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}
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void
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spdk_blob_open_opts_init(struct spdk_blob_open_opts *opts)
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{
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opts->clear_method = BLOB_CLEAR_WITH_UNMAP;
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}
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static struct spdk_blob *
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_spdk_blob_alloc(struct spdk_blob_store *bs, spdk_blob_id id)
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{
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struct spdk_blob *blob;
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blob = calloc(1, sizeof(*blob));
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if (!blob) {
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return NULL;
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}
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blob->id = id;
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blob->bs = bs;
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blob->parent_id = SPDK_BLOBID_INVALID;
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blob->state = SPDK_BLOB_STATE_DIRTY;
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blob->active.num_pages = 1;
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blob->active.pages = calloc(1, sizeof(*blob->active.pages));
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if (!blob->active.pages) {
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free(blob);
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return NULL;
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}
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blob->active.pages[0] = _spdk_bs_blobid_to_page(id);
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TAILQ_INIT(&blob->xattrs);
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TAILQ_INIT(&blob->xattrs_internal);
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return blob;
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}
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static void
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_spdk_xattrs_free(struct spdk_xattr_tailq *xattrs)
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{
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struct spdk_xattr *xattr, *xattr_tmp;
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TAILQ_FOREACH_SAFE(xattr, xattrs, link, xattr_tmp) {
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TAILQ_REMOVE(xattrs, xattr, link);
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free(xattr->name);
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free(xattr->value);
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free(xattr);
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}
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}
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static void
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_spdk_blob_free(struct spdk_blob *blob)
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{
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assert(blob != NULL);
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free(blob->active.clusters);
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free(blob->clean.clusters);
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free(blob->active.pages);
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free(blob->clean.pages);
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_spdk_xattrs_free(&blob->xattrs);
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_spdk_xattrs_free(&blob->xattrs_internal);
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if (blob->back_bs_dev) {
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blob->back_bs_dev->destroy(blob->back_bs_dev);
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}
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free(blob);
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}
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struct freeze_io_ctx {
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struct spdk_bs_cpl cpl;
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struct spdk_blob *blob;
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};
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static void
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_spdk_blob_io_sync(struct spdk_io_channel_iter *i)
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{
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spdk_for_each_channel_continue(i, 0);
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}
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static void
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_spdk_blob_execute_queued_io(struct spdk_io_channel_iter *i)
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{
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struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
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struct spdk_bs_channel *ch = spdk_io_channel_get_ctx(_ch);
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struct freeze_io_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
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struct spdk_bs_request_set *set;
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struct spdk_bs_user_op_args *args;
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spdk_bs_user_op_t *op, *tmp;
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TAILQ_FOREACH_SAFE(op, &ch->queued_io, link, tmp) {
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set = (struct spdk_bs_request_set *)op;
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args = &set->u.user_op;
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if (args->blob == ctx->blob) {
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TAILQ_REMOVE(&ch->queued_io, op, link);
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spdk_bs_user_op_execute(op);
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}
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}
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spdk_for_each_channel_continue(i, 0);
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}
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static void
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_spdk_blob_io_cpl(struct spdk_io_channel_iter *i, int status)
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{
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struct freeze_io_ctx *ctx = spdk_io_channel_iter_get_ctx(i);
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ctx->cpl.u.blob_basic.cb_fn(ctx->cpl.u.blob_basic.cb_arg, 0);
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free(ctx);
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}
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static void
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_spdk_blob_freeze_io(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
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{
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struct freeze_io_ctx *ctx;
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ctx = calloc(1, sizeof(*ctx));
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if (!ctx) {
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cb_fn(cb_arg, -ENOMEM);
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return;
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}
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ctx->cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
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ctx->cpl.u.blob_basic.cb_fn = cb_fn;
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ctx->cpl.u.blob_basic.cb_arg = cb_arg;
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ctx->blob = blob;
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/* Freeze I/O on blob */
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blob->frozen_refcnt++;
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if (blob->frozen_refcnt == 1) {
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spdk_for_each_channel(blob->bs, _spdk_blob_io_sync, ctx, _spdk_blob_io_cpl);
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} else {
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cb_fn(cb_arg, 0);
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free(ctx);
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}
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}
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static void
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_spdk_blob_unfreeze_io(struct spdk_blob *blob, spdk_blob_op_complete cb_fn, void *cb_arg)
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{
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struct freeze_io_ctx *ctx;
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ctx = calloc(1, sizeof(*ctx));
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if (!ctx) {
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cb_fn(cb_arg, -ENOMEM);
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return;
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}
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ctx->cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
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ctx->cpl.u.blob_basic.cb_fn = cb_fn;
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ctx->cpl.u.blob_basic.cb_arg = cb_arg;
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ctx->blob = blob;
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assert(blob->frozen_refcnt > 0);
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blob->frozen_refcnt--;
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if (blob->frozen_refcnt == 0) {
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spdk_for_each_channel(blob->bs, _spdk_blob_execute_queued_io, ctx, _spdk_blob_io_cpl);
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} else {
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cb_fn(cb_arg, 0);
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free(ctx);
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}
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}
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static int
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_spdk_blob_mark_clean(struct spdk_blob *blob)
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{
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uint64_t *clusters = NULL;
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uint32_t *pages = NULL;
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assert(blob != NULL);
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if (blob->active.num_clusters) {
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assert(blob->active.clusters);
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clusters = calloc(blob->active.num_clusters, sizeof(*blob->active.clusters));
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if (!clusters) {
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return -ENOMEM;
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}
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memcpy(clusters, blob->active.clusters, blob->active.num_clusters * sizeof(*clusters));
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}
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if (blob->active.num_pages) {
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assert(blob->active.pages);
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pages = calloc(blob->active.num_pages, sizeof(*blob->active.pages));
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if (!pages) {
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free(clusters);
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return -ENOMEM;
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}
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memcpy(pages, blob->active.pages, blob->active.num_pages * sizeof(*pages));
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}
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free(blob->clean.clusters);
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free(blob->clean.pages);
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blob->clean.num_clusters = blob->active.num_clusters;
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blob->clean.clusters = blob->active.clusters;
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blob->clean.num_pages = blob->active.num_pages;
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blob->clean.pages = blob->active.pages;
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blob->active.clusters = clusters;
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blob->active.pages = pages;
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/* If the metadata was dirtied again while the metadata was being written to disk,
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* we do not want to revert the DIRTY state back to CLEAN here.
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*/
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if (blob->state == SPDK_BLOB_STATE_LOADING) {
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blob->state = SPDK_BLOB_STATE_CLEAN;
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}
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return 0;
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}
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static int
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_spdk_blob_deserialize_xattr(struct spdk_blob *blob,
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struct spdk_blob_md_descriptor_xattr *desc_xattr, bool internal)
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{
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struct spdk_xattr *xattr;
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if (desc_xattr->length != sizeof(desc_xattr->name_length) +
|
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sizeof(desc_xattr->value_length) +
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desc_xattr->name_length + desc_xattr->value_length) {
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return -EINVAL;
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}
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xattr = calloc(1, sizeof(*xattr));
|
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if (xattr == NULL) {
|
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return -ENOMEM;
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}
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xattr->name = malloc(desc_xattr->name_length + 1);
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if (xattr->name == NULL) {
|
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free(xattr);
|
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return -ENOMEM;
|
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}
|
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memcpy(xattr->name, desc_xattr->name, desc_xattr->name_length);
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xattr->name[desc_xattr->name_length] = '\0';
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xattr->value = malloc(desc_xattr->value_length);
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if (xattr->value == NULL) {
|
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free(xattr->name);
|
|
free(xattr);
|
|
return -ENOMEM;
|
|
}
|
|
xattr->value_len = desc_xattr->value_length;
|
|
memcpy(xattr->value,
|
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(void *)((uintptr_t)desc_xattr->name + desc_xattr->name_length),
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|
desc_xattr->value_length);
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TAILQ_INSERT_TAIL(internal ? &blob->xattrs_internal : &blob->xattrs, xattr, link);
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return 0;
|
|
}
|
|
|
|
|
|
static int
|
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_spdk_blob_parse_page(const struct spdk_blob_md_page *page, struct spdk_blob *blob)
|
|
{
|
|
struct spdk_blob_md_descriptor *desc;
|
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size_t cur_desc = 0;
|
|
void *tmp;
|
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|
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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 (desc_extent->extents[i].cluster_idx != 0) {
|
|
if (!spdk_bit_array_get(blob->bs->used_clusters,
|
|
desc_extent->extents[i].cluster_idx + j)) {
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
cluster_count++;
|
|
}
|
|
}
|
|
|
|
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_malloc(SPDK_BS_PAGE_SIZE, SPDK_BS_PAGE_SIZE,
|
|
NULL, SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
} else {
|
|
assert(*pages != NULL);
|
|
(*page_count)++;
|
|
*pages = spdk_realloc(*pages,
|
|
SPDK_BS_PAGE_SIZE * (*page_count),
|
|
SPDK_BS_PAGE_SIZE);
|
|
}
|
|
|
|
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;
|
|
uint64_t lba, lba_per_cluster, lba_count;
|
|
|
|
/* The buffer must have room for at least one extent */
|
|
cur_sz = sizeof(struct spdk_blob_md_descriptor) + sizeof(desc->extents[0]);
|
|
if (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;
|
|
} else if (lba == 0 && blob->active.clusters[i] == 0) {
|
|
lba_count += lba_per_cluster;
|
|
continue;
|
|
}
|
|
desc->extents[extent_idx].cluster_idx = lba / lba_per_cluster;
|
|
desc->extents[extent_idx].length = lba_count / lba_per_cluster;
|
|
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_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_free(*pages);
|
|
*pages = NULL;
|
|
*page_count = 0;
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
*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_t *seq;
|
|
|
|
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_final(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_blob_load_ctx *ctx = cb_arg;
|
|
struct spdk_blob *blob = ctx->blob;
|
|
|
|
_spdk_blob_mark_clean(blob);
|
|
|
|
ctx->cb_fn(ctx->seq, ctx->cb_arg, bserrno);
|
|
|
|
/* Free the memory */
|
|
spdk_free(ctx->pages);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_load_snapshot_cpl(void *cb_arg, struct spdk_blob *snapshot, int bserrno)
|
|
{
|
|
struct spdk_blob_load_ctx *ctx = cb_arg;
|
|
struct spdk_blob *blob = ctx->blob;
|
|
|
|
if (bserrno != 0) {
|
|
goto error;
|
|
}
|
|
|
|
blob->back_bs_dev = spdk_bs_create_blob_bs_dev(snapshot);
|
|
|
|
if (blob->back_bs_dev == NULL) {
|
|
bserrno = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
_spdk_blob_load_final(ctx, bserrno);
|
|
return;
|
|
|
|
error:
|
|
SPDK_ERRLOG("Snapshot fail\n");
|
|
_spdk_blob_free(blob);
|
|
ctx->cb_fn(ctx->seq, NULL, bserrno);
|
|
spdk_free(ctx->pages);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_load_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_blob_load_ctx *ctx = cb_arg;
|
|
struct spdk_blob *blob = ctx->blob;
|
|
struct spdk_blob_md_page *page;
|
|
const void *value;
|
|
size_t len;
|
|
int rc;
|
|
uint32_t crc;
|
|
|
|
if (bserrno) {
|
|
SPDK_ERRLOG("Metadata page read failed: %d\n", bserrno);
|
|
_spdk_blob_free(blob);
|
|
ctx->cb_fn(seq, NULL, bserrno);
|
|
spdk_free(ctx->pages);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
|
|
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_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);
|
|
uint64_t max_md_lba = _spdk_bs_page_to_lba(blob->bs, blob->bs->md_start + blob->bs->md_len);
|
|
|
|
if (next_lba >= max_md_lba) {
|
|
assert(false);
|
|
}
|
|
|
|
/* Read the next page */
|
|
ctx->num_pages++;
|
|
ctx->pages = spdk_realloc(ctx->pages, (sizeof(*page) * ctx->num_pages),
|
|
sizeof(*page));
|
|
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_free(ctx->pages);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
ctx->seq = seq;
|
|
|
|
|
|
if (spdk_blob_is_thin_provisioned(blob)) {
|
|
rc = _spdk_blob_get_xattr_value(blob, BLOB_SNAPSHOT, &value, &len, true);
|
|
if (rc == 0) {
|
|
if (len != sizeof(spdk_blob_id)) {
|
|
_spdk_blob_free(blob);
|
|
ctx->cb_fn(seq, NULL, -EINVAL);
|
|
spdk_free(ctx->pages);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
/* open snapshot blob and continue in the callback function */
|
|
blob->parent_id = *(spdk_blob_id *)value;
|
|
spdk_bs_open_blob(blob->bs, blob->parent_id,
|
|
_spdk_blob_load_snapshot_cpl, ctx);
|
|
return;
|
|
} else {
|
|
/* add zeroes_dev for thin provisioned blob */
|
|
blob->back_bs_dev = spdk_bs_create_zeroes_dev();
|
|
}
|
|
} else {
|
|
/* standard blob */
|
|
blob->back_bs_dev = NULL;
|
|
}
|
|
_spdk_blob_load_final(ctx, bserrno);
|
|
}
|
|
|
|
/* Load a blob from disk given a blobid */
|
|
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_realloc(ctx->pages, SPDK_BS_PAGE_SIZE, SPDK_BS_PAGE_SIZE);
|
|
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_bs_super_block *super;
|
|
|
|
struct spdk_blob_md_page *pages;
|
|
|
|
uint64_t idx;
|
|
|
|
spdk_bs_sequence_t *seq;
|
|
spdk_bs_sequence_cpl cb_fn;
|
|
void *cb_arg;
|
|
};
|
|
|
|
static void
|
|
spdk_bs_batch_clear_dev(struct spdk_blob_persist_ctx *ctx, spdk_bs_batch_t *batch, uint64_t lba,
|
|
uint32_t lba_count)
|
|
{
|
|
if (ctx->blob->clear_method == BLOB_CLEAR_WITH_DEFAULT ||
|
|
ctx->blob->clear_method == BLOB_CLEAR_WITH_UNMAP) {
|
|
spdk_bs_batch_unmap_dev(batch, lba, lba_count);
|
|
} else if (ctx->blob->clear_method == BLOB_CLEAR_WITH_WRITE_ZEROES) {
|
|
spdk_bs_batch_write_zeroes_dev(batch, lba, lba_count);
|
|
}
|
|
}
|
|
|
|
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_free(ctx->pages);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_persist_clear_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;
|
|
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 if (blob->active.num_clusters != blob->active.cluster_array_size) {
|
|
#ifndef __clang_analyzer__
|
|
void *tmp;
|
|
|
|
/* scan-build really can't figure reallocs, workaround it */
|
|
tmp = realloc(blob->active.clusters, sizeof(uint64_t) * blob->active.num_clusters);
|
|
assert(tmp != NULL);
|
|
blob->active.clusters = tmp;
|
|
#endif
|
|
blob->active.cluster_array_size = blob->active.num_clusters;
|
|
}
|
|
|
|
_spdk_blob_persist_complete(seq, ctx, bserrno);
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_persist_clear_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_clear_clusters_cpl, ctx);
|
|
|
|
/* Clear 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, clear them now */
|
|
if (lba_count > 0) {
|
|
spdk_bs_batch_clear_dev(ctx, 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, clear them now */
|
|
if (lba_count > 0) {
|
|
spdk_bs_batch_clear_dev(ctx, 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 clearing clusters */
|
|
_spdk_blob_persist_clear_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_blob_resize(struct spdk_blob *blob, uint64_t sz)
|
|
{
|
|
uint64_t i;
|
|
uint64_t *tmp;
|
|
uint64_t lfc; /* lowest free cluster */
|
|
uint64_t num_clusters;
|
|
struct spdk_blob_store *bs;
|
|
|
|
bs = blob->bs;
|
|
|
|
_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 == UINT32_MAX) {
|
|
/* 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;
|
|
void *tmp;
|
|
int rc;
|
|
|
|
if (blob->active.num_pages == 0) {
|
|
/* This is the signal that the blob should be deleted.
|
|
* Immediately jump to the clean up routine. */
|
|
assert(blob->clean.num_pages > 0);
|
|
ctx->idx = blob->clean.num_pages - 1;
|
|
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 */
|
|
tmp = realloc(blob->active.pages, blob->active.num_pages * sizeof(*blob->active.pages));
|
|
if (!tmp) {
|
|
_spdk_blob_persist_complete(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
blob->active.pages = tmp;
|
|
|
|
/* Assign this metadata to pages. This requires two passes -
|
|
* one to verify that there are enough pages and a second
|
|
* 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 == UINT32_MAX) {
|
|
_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);
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_persist_dirty_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_blob_persist_ctx *ctx = cb_arg;
|
|
|
|
ctx->blob->bs->clean = 0;
|
|
|
|
spdk_free(ctx->super);
|
|
|
|
_spdk_blob_persist_start(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_write_super(spdk_bs_sequence_t *seq, struct spdk_blob_store *bs,
|
|
struct spdk_bs_super_block *super, spdk_bs_sequence_cpl cb_fn, void *cb_arg);
|
|
|
|
|
|
static void
|
|
_spdk_blob_persist_dirty(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_blob_persist_ctx *ctx = cb_arg;
|
|
|
|
ctx->super->clean = 0;
|
|
if (ctx->super->size == 0) {
|
|
ctx->super->size = ctx->blob->bs->dev->blockcnt * ctx->blob->bs->dev->blocklen;
|
|
}
|
|
|
|
_spdk_bs_write_super(seq, ctx->blob->bs, ctx->super, _spdk_blob_persist_dirty_cpl, ctx);
|
|
}
|
|
|
|
|
|
/* 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;
|
|
|
|
if (blob->bs->clean) {
|
|
ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
if (!ctx->super) {
|
|
cb_fn(seq, cb_arg, -ENOMEM);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
|
|
spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(blob->bs, 0),
|
|
_spdk_bs_byte_to_lba(blob->bs, sizeof(*ctx->super)),
|
|
_spdk_blob_persist_dirty, ctx);
|
|
} else {
|
|
_spdk_blob_persist_start(ctx);
|
|
}
|
|
}
|
|
|
|
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_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) {
|
|
if (bserrno == -EEXIST) {
|
|
/* The metadata insert failed because another thread
|
|
* allocated the cluster first. Free our cluster
|
|
* but continue without error. */
|
|
bserrno = 0;
|
|
}
|
|
_spdk_bs_release_cluster(ctx->blob->bs, ctx->new_cluster);
|
|
}
|
|
|
|
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 io_unit, 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 io_unit offset down to the first page in the cluster */
|
|
cluster_start_page = _spdk_bs_io_unit_to_cluster_start(blob, io_unit);
|
|
|
|
/* Calculate which index in the metadata cluster array the corresponding
|
|
* cluster is supposed to be at. */
|
|
cluster_number = _spdk_bs_io_unit_to_cluster_number(blob, io_unit);
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (!ctx) {
|
|
spdk_bs_user_op_abort(op);
|
|
return;
|
|
}
|
|
|
|
assert(blob->bs->cluster_sz % blob->back_bs_dev->blocklen == 0);
|
|
|
|
ctx->blob = blob;
|
|
ctx->page = cluster_start_page;
|
|
|
|
if (blob->parent_id != SPDK_BLOBID_INVALID) {
|
|
ctx->buf = spdk_malloc(blob->bs->cluster_sz, blob->back_bs_dev->blocklen,
|
|
NULL, SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
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_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_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);
|
|
|
|
if (blob->parent_id != SPDK_BLOBID_INVALID) {
|
|
/* Read cluster from backing device */
|
|
spdk_bs_sequence_read_bs_dev(ctx->seq, blob->back_bs_dev, ctx->buf,
|
|
_spdk_bs_dev_page_to_lba(blob->back_bs_dev, cluster_start_page),
|
|
_spdk_bs_dev_byte_to_lba(blob->back_bs_dev, blob->bs->cluster_sz),
|
|
_spdk_blob_write_copy, ctx);
|
|
} else {
|
|
_spdk_blob_insert_cluster_on_md_thread(ctx->blob, cluster_number, ctx->new_cluster,
|
|
_spdk_blob_insert_cluster_cpl, ctx);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_calculate_lba_and_lba_count(struct spdk_blob *blob, uint64_t io_unit, uint64_t length,
|
|
uint64_t *lba, uint32_t *lba_count)
|
|
{
|
|
*lba_count = length;
|
|
|
|
if (!_spdk_bs_io_unit_is_allocated(blob, io_unit)) {
|
|
assert(blob->back_bs_dev != NULL);
|
|
*lba = _spdk_bs_io_unit_to_back_dev_lba(blob, io_unit);
|
|
*lba_count = _spdk_bs_io_unit_to_back_dev_lba(blob, *lba_count);
|
|
} else {
|
|
*lba = _spdk_bs_blob_io_unit_to_lba(blob, io_unit);
|
|
}
|
|
}
|
|
|
|
struct op_split_ctx {
|
|
struct spdk_blob *blob;
|
|
struct spdk_io_channel *channel;
|
|
uint64_t io_unit_offset;
|
|
uint64_t io_units_remaining;
|
|
void *curr_payload;
|
|
enum spdk_blob_op_type op_type;
|
|
spdk_bs_sequence_t *seq;
|
|
};
|
|
|
|
static void
|
|
_spdk_blob_request_submit_op_split_next(void *cb_arg, int bserrno)
|
|
{
|
|
struct op_split_ctx *ctx = cb_arg;
|
|
struct spdk_blob *blob = ctx->blob;
|
|
struct spdk_io_channel *ch = ctx->channel;
|
|
enum spdk_blob_op_type op_type = ctx->op_type;
|
|
uint8_t *buf = ctx->curr_payload;
|
|
uint64_t offset = ctx->io_unit_offset;
|
|
uint64_t length = ctx->io_units_remaining;
|
|
uint64_t op_length;
|
|
|
|
if (bserrno != 0 || ctx->io_units_remaining == 0) {
|
|
spdk_bs_sequence_finish(ctx->seq, bserrno);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
|
|
op_length = spdk_min(length, _spdk_bs_num_io_units_to_cluster_boundary(blob,
|
|
offset));
|
|
|
|
/* Update length and payload for next operation */
|
|
ctx->io_units_remaining -= op_length;
|
|
ctx->io_unit_offset += op_length;
|
|
if (op_type == SPDK_BLOB_WRITE || op_type == SPDK_BLOB_READ) {
|
|
ctx->curr_payload += op_length * blob->bs->io_unit_size;
|
|
}
|
|
|
|
switch (op_type) {
|
|
case SPDK_BLOB_READ:
|
|
spdk_blob_io_read(blob, ch, buf, offset, op_length,
|
|
_spdk_blob_request_submit_op_split_next, ctx);
|
|
break;
|
|
case SPDK_BLOB_WRITE:
|
|
spdk_blob_io_write(blob, ch, buf, offset, op_length,
|
|
_spdk_blob_request_submit_op_split_next, ctx);
|
|
break;
|
|
case SPDK_BLOB_UNMAP:
|
|
spdk_blob_io_unmap(blob, ch, offset, op_length,
|
|
_spdk_blob_request_submit_op_split_next, ctx);
|
|
break;
|
|
case SPDK_BLOB_WRITE_ZEROES:
|
|
spdk_blob_io_write_zeroes(blob, ch, offset, op_length,
|
|
_spdk_blob_request_submit_op_split_next, ctx);
|
|
break;
|
|
case SPDK_BLOB_READV:
|
|
case SPDK_BLOB_WRITEV:
|
|
SPDK_ERRLOG("readv/write not valid for %s\n", __func__);
|
|
spdk_bs_sequence_finish(ctx->seq, -EINVAL);
|
|
free(ctx);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_request_submit_op_split(struct spdk_io_channel *ch, struct spdk_blob *blob,
|
|
void *payload, uint64_t offset, uint64_t length,
|
|
spdk_blob_op_complete cb_fn, void *cb_arg, enum spdk_blob_op_type op_type)
|
|
{
|
|
struct op_split_ctx *ctx;
|
|
spdk_bs_sequence_t *seq;
|
|
struct spdk_bs_cpl cpl;
|
|
|
|
assert(blob != NULL);
|
|
|
|
ctx = calloc(1, sizeof(struct op_split_ctx));
|
|
if (ctx == NULL) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
|
|
cpl.u.blob_basic.cb_fn = cb_fn;
|
|
cpl.u.blob_basic.cb_arg = cb_arg;
|
|
|
|
seq = spdk_bs_sequence_start(ch, &cpl);
|
|
if (!seq) {
|
|
free(ctx);
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->blob = blob;
|
|
ctx->channel = ch;
|
|
ctx->curr_payload = payload;
|
|
ctx->io_unit_offset = offset;
|
|
ctx->io_units_remaining = length;
|
|
ctx->op_type = op_type;
|
|
ctx->seq = seq;
|
|
|
|
_spdk_blob_request_submit_op_split_next(ctx, 0);
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_request_submit_op_single(struct spdk_io_channel *_ch, struct spdk_blob *blob,
|
|
void *payload, uint64_t offset, uint64_t length,
|
|
spdk_blob_op_complete cb_fn, void *cb_arg, enum spdk_blob_op_type op_type)
|
|
{
|
|
struct spdk_bs_cpl cpl;
|
|
uint64_t lba;
|
|
uint32_t lba_count;
|
|
|
|
assert(blob != NULL);
|
|
|
|
cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
|
|
cpl.u.blob_basic.cb_fn = cb_fn;
|
|
cpl.u.blob_basic.cb_arg = cb_arg;
|
|
|
|
_spdk_blob_calculate_lba_and_lba_count(blob, offset, length, &lba, &lba_count);
|
|
|
|
if (blob->frozen_refcnt) {
|
|
/* This blob I/O is frozen */
|
|
spdk_bs_user_op_t *op;
|
|
struct spdk_bs_channel *bs_channel = spdk_io_channel_get_ctx(_ch);
|
|
|
|
op = spdk_bs_user_op_alloc(_ch, &cpl, op_type, blob, payload, 0, offset, length);
|
|
if (!op) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
TAILQ_INSERT_TAIL(&bs_channel->queued_io, op, link);
|
|
|
|
return;
|
|
}
|
|
|
|
switch (op_type) {
|
|
case SPDK_BLOB_READ: {
|
|
spdk_bs_batch_t *batch;
|
|
|
|
batch = spdk_bs_batch_open(_ch, &cpl);
|
|
if (!batch) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
|
|
/* Read from the blob */
|
|
spdk_bs_batch_read_dev(batch, payload, lba, lba_count);
|
|
} else {
|
|
/* Read from the backing block device */
|
|
spdk_bs_batch_read_bs_dev(batch, blob->back_bs_dev, payload, lba, lba_count);
|
|
}
|
|
|
|
spdk_bs_batch_close(batch);
|
|
break;
|
|
}
|
|
case SPDK_BLOB_WRITE:
|
|
case SPDK_BLOB_WRITE_ZEROES: {
|
|
if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
|
|
/* Write to the blob */
|
|
spdk_bs_batch_t *batch;
|
|
|
|
if (lba_count == 0) {
|
|
cb_fn(cb_arg, 0);
|
|
return;
|
|
}
|
|
|
|
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_io_unit_is_allocated(blob, offset)) {
|
|
spdk_bs_batch_unmap_dev(batch, lba, lba_count);
|
|
}
|
|
|
|
spdk_bs_batch_close(batch);
|
|
break;
|
|
}
|
|
case SPDK_BLOB_READV:
|
|
case SPDK_BLOB_WRITEV:
|
|
SPDK_ERRLOG("readv/write not valid\n");
|
|
cb_fn(cb_arg, -EINVAL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_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 > _spdk_bs_cluster_to_lba(blob->bs, blob->active.num_clusters)) {
|
|
cb_fn(cb_arg, -EINVAL);
|
|
return;
|
|
}
|
|
if (length <= _spdk_bs_num_io_units_to_cluster_boundary(blob, offset)) {
|
|
_spdk_blob_request_submit_op_single(_channel, blob, payload, offset, length,
|
|
cb_fn, cb_arg, op_type);
|
|
} else {
|
|
_spdk_blob_request_submit_op_split(_channel, blob, payload, offset, length,
|
|
cb_fn, cb_arg, op_type);
|
|
}
|
|
}
|
|
|
|
struct rw_iov_ctx {
|
|
struct spdk_blob *blob;
|
|
struct spdk_io_channel *channel;
|
|
spdk_blob_op_complete cb_fn;
|
|
void *cb_arg;
|
|
bool read;
|
|
int iovcnt;
|
|
struct iovec *orig_iov;
|
|
uint64_t io_unit_offset;
|
|
uint64_t io_units_remaining;
|
|
uint64_t io_units_done;
|
|
struct iovec iov[0];
|
|
};
|
|
|
|
static void
|
|
_spdk_rw_iov_done(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
assert(cb_arg == NULL);
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
}
|
|
|
|
static void
|
|
_spdk_rw_iov_split_next(void *cb_arg, int bserrno)
|
|
{
|
|
struct rw_iov_ctx *ctx = cb_arg;
|
|
struct spdk_blob *blob = ctx->blob;
|
|
struct iovec *iov, *orig_iov;
|
|
int iovcnt;
|
|
size_t orig_iovoff;
|
|
uint64_t io_units_count, io_units_to_boundary, io_unit_offset;
|
|
uint64_t byte_count;
|
|
|
|
if (bserrno != 0 || ctx->io_units_remaining == 0) {
|
|
ctx->cb_fn(ctx->cb_arg, bserrno);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
|
|
io_unit_offset = ctx->io_unit_offset;
|
|
io_units_to_boundary = _spdk_bs_num_io_units_to_cluster_boundary(blob, io_unit_offset);
|
|
io_units_count = spdk_min(ctx->io_units_remaining, io_units_to_boundary);
|
|
/*
|
|
* Get index and offset into the original iov array for our current position in the I/O sequence.
|
|
* byte_count will keep track of how many bytes remaining until orig_iov and orig_iovoff will
|
|
* point to the current position in the I/O sequence.
|
|
*/
|
|
byte_count = ctx->io_units_done * blob->bs->io_unit_size;
|
|
orig_iov = &ctx->orig_iov[0];
|
|
orig_iovoff = 0;
|
|
while (byte_count > 0) {
|
|
if (byte_count >= orig_iov->iov_len) {
|
|
byte_count -= orig_iov->iov_len;
|
|
orig_iov++;
|
|
} else {
|
|
orig_iovoff = byte_count;
|
|
byte_count = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Build an iov array for the next I/O in the sequence. byte_count will keep track of how many
|
|
* bytes of this next I/O remain to be accounted for in the new iov array.
|
|
*/
|
|
byte_count = io_units_count * blob->bs->io_unit_size;
|
|
iov = &ctx->iov[0];
|
|
iovcnt = 0;
|
|
while (byte_count > 0) {
|
|
assert(iovcnt < ctx->iovcnt);
|
|
iov->iov_len = spdk_min(byte_count, orig_iov->iov_len - orig_iovoff);
|
|
iov->iov_base = orig_iov->iov_base + orig_iovoff;
|
|
byte_count -= iov->iov_len;
|
|
orig_iovoff = 0;
|
|
orig_iov++;
|
|
iov++;
|
|
iovcnt++;
|
|
}
|
|
|
|
ctx->io_unit_offset += io_units_count;
|
|
ctx->io_units_remaining -= io_units_count;
|
|
ctx->io_units_done += io_units_count;
|
|
iov = &ctx->iov[0];
|
|
|
|
if (ctx->read) {
|
|
spdk_blob_io_readv(ctx->blob, ctx->channel, iov, iovcnt, io_unit_offset,
|
|
io_units_count, _spdk_rw_iov_split_next, ctx);
|
|
} else {
|
|
spdk_blob_io_writev(ctx->blob, ctx->channel, iov, iovcnt, io_unit_offset,
|
|
io_units_count, _spdk_rw_iov_split_next, ctx);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_request_submit_rw_iov(struct spdk_blob *blob, struct spdk_io_channel *_channel,
|
|
struct iovec *iov, int iovcnt, uint64_t offset, uint64_t length,
|
|
spdk_blob_op_complete cb_fn, void *cb_arg, bool read)
|
|
{
|
|
struct spdk_bs_cpl cpl;
|
|
|
|
assert(blob != NULL);
|
|
|
|
if (!read && blob->data_ro) {
|
|
cb_fn(cb_arg, -EPERM);
|
|
return;
|
|
}
|
|
|
|
if (length == 0) {
|
|
cb_fn(cb_arg, 0);
|
|
return;
|
|
}
|
|
|
|
if (offset + length > _spdk_bs_cluster_to_lba(blob->bs, blob->active.num_clusters)) {
|
|
cb_fn(cb_arg, -EINVAL);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* For now, we implement readv/writev using a sequence (instead of a batch) to account for having
|
|
* to split a request that spans a cluster boundary. For I/O that do not span a cluster boundary,
|
|
* there will be no noticeable difference compared to using a batch. For I/O that do span a cluster
|
|
* boundary, the target LBAs (after blob offset to LBA translation) may not be contiguous, so we need
|
|
* to allocate a separate iov array and split the I/O such that none of the resulting
|
|
* smaller I/O cross a cluster boundary. These smaller I/O will be issued in sequence (not in parallel)
|
|
* but since this case happens very infrequently, any performance impact will be negligible.
|
|
*
|
|
* This could be optimized in the future to allocate a big enough iov array to account for all of the iovs
|
|
* for all of the smaller I/Os, pre-build all of the iov arrays for the smaller I/Os, then issue them
|
|
* in a batch. That would also require creating an intermediate spdk_bs_cpl that would get called
|
|
* when the batch was completed, to allow for freeing the memory for the iov arrays.
|
|
*/
|
|
if (spdk_likely(length <= _spdk_bs_num_io_units_to_cluster_boundary(blob, offset))) {
|
|
uint32_t lba_count;
|
|
uint64_t lba;
|
|
|
|
cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
|
|
cpl.u.blob_basic.cb_fn = cb_fn;
|
|
cpl.u.blob_basic.cb_arg = cb_arg;
|
|
|
|
if (blob->frozen_refcnt) {
|
|
/* This blob I/O is frozen */
|
|
enum spdk_blob_op_type op_type;
|
|
spdk_bs_user_op_t *op;
|
|
struct spdk_bs_channel *bs_channel = spdk_io_channel_get_ctx(_channel);
|
|
|
|
op_type = read ? SPDK_BLOB_READV : SPDK_BLOB_WRITEV;
|
|
op = spdk_bs_user_op_alloc(_channel, &cpl, op_type, blob, iov, iovcnt, offset, length);
|
|
if (!op) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
TAILQ_INSERT_TAIL(&bs_channel->queued_io, op, link);
|
|
|
|
return;
|
|
}
|
|
|
|
_spdk_blob_calculate_lba_and_lba_count(blob, offset, length, &lba, &lba_count);
|
|
|
|
if (read) {
|
|
spdk_bs_sequence_t *seq;
|
|
|
|
seq = spdk_bs_sequence_start(_channel, &cpl);
|
|
if (!seq) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
|
|
spdk_bs_sequence_readv_dev(seq, iov, iovcnt, lba, lba_count, _spdk_rw_iov_done, NULL);
|
|
} else {
|
|
spdk_bs_sequence_readv_bs_dev(seq, blob->back_bs_dev, iov, iovcnt, lba, lba_count,
|
|
_spdk_rw_iov_done, NULL);
|
|
}
|
|
} else {
|
|
if (_spdk_bs_io_unit_is_allocated(blob, offset)) {
|
|
spdk_bs_sequence_t *seq;
|
|
|
|
seq = spdk_bs_sequence_start(_channel, &cpl);
|
|
if (!seq) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
spdk_bs_sequence_writev_dev(seq, iov, iovcnt, lba, lba_count, _spdk_rw_iov_done, NULL);
|
|
} else {
|
|
/* Queue this operation and allocate the cluster */
|
|
spdk_bs_user_op_t *op;
|
|
|
|
op = spdk_bs_user_op_alloc(_channel, &cpl, SPDK_BLOB_WRITEV, blob, iov, iovcnt, offset,
|
|
length);
|
|
if (!op) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
_spdk_bs_allocate_and_copy_cluster(blob, _channel, offset, op);
|
|
}
|
|
}
|
|
} else {
|
|
struct rw_iov_ctx *ctx;
|
|
|
|
ctx = calloc(1, sizeof(struct rw_iov_ctx) + iovcnt * sizeof(struct iovec));
|
|
if (ctx == NULL) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->blob = blob;
|
|
ctx->channel = _channel;
|
|
ctx->cb_fn = cb_fn;
|
|
ctx->cb_arg = cb_arg;
|
|
ctx->read = read;
|
|
ctx->orig_iov = iov;
|
|
ctx->iovcnt = iovcnt;
|
|
ctx->io_unit_offset = offset;
|
|
ctx->io_units_remaining = length;
|
|
ctx->io_units_done = 0;
|
|
|
|
_spdk_rw_iov_split_next(ctx, 0);
|
|
}
|
|
}
|
|
|
|
static struct spdk_blob *
|
|
_spdk_blob_lookup(struct spdk_blob_store *bs, spdk_blob_id blobid)
|
|
{
|
|
struct spdk_blob *blob;
|
|
|
|
TAILQ_FOREACH(blob, &bs->blobs, link) {
|
|
if (blob->id == blobid) {
|
|
return blob;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_get_snapshot_and_clone_entries(struct spdk_blob *blob,
|
|
struct spdk_blob_list **snapshot_entry, struct spdk_blob_list **clone_entry)
|
|
{
|
|
assert(blob != NULL);
|
|
*snapshot_entry = NULL;
|
|
*clone_entry = NULL;
|
|
|
|
if (blob->parent_id == SPDK_BLOBID_INVALID) {
|
|
return;
|
|
}
|
|
|
|
TAILQ_FOREACH(*snapshot_entry, &blob->bs->snapshots, link) {
|
|
if ((*snapshot_entry)->id == blob->parent_id) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (*snapshot_entry != NULL) {
|
|
TAILQ_FOREACH(*clone_entry, &(*snapshot_entry)->clones, link) {
|
|
if ((*clone_entry)->id == blob->id) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
assert(clone_entry != NULL);
|
|
}
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_channel_create(void *io_device, void *ctx_buf)
|
|
{
|
|
struct spdk_blob_store *bs = io_device;
|
|
struct spdk_bs_channel *channel = ctx_buf;
|
|
struct spdk_bs_dev *dev;
|
|
uint32_t max_ops = bs->max_channel_ops;
|
|
uint32_t i;
|
|
|
|
dev = bs->dev;
|
|
|
|
channel->req_mem = calloc(max_ops, sizeof(struct spdk_bs_request_set));
|
|
if (!channel->req_mem) {
|
|
return -1;
|
|
}
|
|
|
|
TAILQ_INIT(&channel->reqs);
|
|
|
|
for (i = 0; i < max_ops; i++) {
|
|
TAILQ_INSERT_TAIL(&channel->reqs, &channel->req_mem[i], link);
|
|
}
|
|
|
|
channel->bs = bs;
|
|
channel->dev = dev;
|
|
channel->dev_channel = dev->create_channel(dev);
|
|
|
|
if (!channel->dev_channel) {
|
|
SPDK_ERRLOG("Failed to create device channel.\n");
|
|
free(channel->req_mem);
|
|
return -1;
|
|
}
|
|
|
|
TAILQ_INIT(&channel->need_cluster_alloc);
|
|
TAILQ_INIT(&channel->queued_io);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_channel_destroy(void *io_device, void *ctx_buf)
|
|
{
|
|
struct spdk_bs_channel *channel = ctx_buf;
|
|
spdk_bs_user_op_t *op;
|
|
|
|
while (!TAILQ_EMPTY(&channel->need_cluster_alloc)) {
|
|
op = TAILQ_FIRST(&channel->need_cluster_alloc);
|
|
TAILQ_REMOVE(&channel->need_cluster_alloc, op, link);
|
|
spdk_bs_user_op_abort(op);
|
|
}
|
|
|
|
while (!TAILQ_EMPTY(&channel->queued_io)) {
|
|
op = TAILQ_FIRST(&channel->queued_io);
|
|
TAILQ_REMOVE(&channel->queued_io, op, link);
|
|
spdk_bs_user_op_abort(op);
|
|
}
|
|
|
|
free(channel->req_mem);
|
|
channel->dev->destroy_channel(channel->dev, channel->dev_channel);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_dev_destroy(void *io_device)
|
|
{
|
|
struct spdk_blob_store *bs = io_device;
|
|
struct spdk_blob *blob, *blob_tmp;
|
|
|
|
bs->dev->destroy(bs->dev);
|
|
|
|
TAILQ_FOREACH_SAFE(blob, &bs->blobs, link, blob_tmp) {
|
|
TAILQ_REMOVE(&bs->blobs, blob, link);
|
|
_spdk_blob_free(blob);
|
|
}
|
|
|
|
pthread_mutex_destroy(&bs->used_clusters_mutex);
|
|
|
|
spdk_bit_array_free(&bs->used_blobids);
|
|
spdk_bit_array_free(&bs->used_md_pages);
|
|
spdk_bit_array_free(&bs->used_clusters);
|
|
/*
|
|
* If this function is called for any reason except a successful unload,
|
|
* the unload_cpl type will be NONE and this will be a nop.
|
|
*/
|
|
spdk_bs_call_cpl(&bs->unload_cpl, bs->unload_err);
|
|
|
|
free(bs);
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_blob_list_add(struct spdk_blob *blob)
|
|
{
|
|
spdk_blob_id snapshot_id;
|
|
struct spdk_blob_list *snapshot_entry = NULL;
|
|
struct spdk_blob_list *clone_entry = NULL;
|
|
|
|
assert(blob != NULL);
|
|
|
|
snapshot_id = blob->parent_id;
|
|
if (snapshot_id == SPDK_BLOBID_INVALID) {
|
|
return 0;
|
|
}
|
|
|
|
snapshot_entry = _spdk_bs_get_snapshot_entry(blob->bs, snapshot_id);
|
|
if (snapshot_entry == NULL) {
|
|
/* Snapshot not found */
|
|
snapshot_entry = calloc(1, sizeof(struct spdk_blob_list));
|
|
if (snapshot_entry == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
snapshot_entry->id = snapshot_id;
|
|
TAILQ_INIT(&snapshot_entry->clones);
|
|
TAILQ_INSERT_TAIL(&blob->bs->snapshots, snapshot_entry, link);
|
|
} else {
|
|
TAILQ_FOREACH(clone_entry, &snapshot_entry->clones, link) {
|
|
if (clone_entry->id == blob->id) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (clone_entry == NULL) {
|
|
/* Clone not found */
|
|
clone_entry = calloc(1, sizeof(struct spdk_blob_list));
|
|
if (clone_entry == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
clone_entry->id = blob->id;
|
|
TAILQ_INIT(&clone_entry->clones);
|
|
TAILQ_INSERT_TAIL(&snapshot_entry->clones, clone_entry, link);
|
|
snapshot_entry->clone_count++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_blob_list_remove(struct spdk_blob *blob)
|
|
{
|
|
struct spdk_blob_list *snapshot_entry = NULL;
|
|
struct spdk_blob_list *clone_entry = NULL;
|
|
|
|
_spdk_blob_get_snapshot_and_clone_entries(blob, &snapshot_entry, &clone_entry);
|
|
|
|
if (snapshot_entry == NULL) {
|
|
return;
|
|
}
|
|
|
|
blob->parent_id = SPDK_BLOBID_INVALID;
|
|
TAILQ_REMOVE(&snapshot_entry->clones, clone_entry, link);
|
|
free(clone_entry);
|
|
|
|
snapshot_entry->clone_count--;
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_blob_list_free(struct spdk_blob_store *bs)
|
|
{
|
|
struct spdk_blob_list *snapshot_entry;
|
|
struct spdk_blob_list *snapshot_entry_tmp;
|
|
struct spdk_blob_list *clone_entry;
|
|
struct spdk_blob_list *clone_entry_tmp;
|
|
|
|
TAILQ_FOREACH_SAFE(snapshot_entry, &bs->snapshots, link, snapshot_entry_tmp) {
|
|
TAILQ_FOREACH_SAFE(clone_entry, &snapshot_entry->clones, link, clone_entry_tmp) {
|
|
TAILQ_REMOVE(&snapshot_entry->clones, clone_entry, link);
|
|
free(clone_entry);
|
|
}
|
|
TAILQ_REMOVE(&bs->snapshots, snapshot_entry, link);
|
|
free(snapshot_entry);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_free(struct spdk_blob_store *bs)
|
|
{
|
|
_spdk_bs_blob_list_free(bs);
|
|
|
|
spdk_bs_unregister_md_thread(bs);
|
|
spdk_io_device_unregister(bs, _spdk_bs_dev_destroy);
|
|
}
|
|
|
|
void
|
|
spdk_bs_opts_init(struct spdk_bs_opts *opts)
|
|
{
|
|
opts->cluster_sz = SPDK_BLOB_OPTS_CLUSTER_SZ;
|
|
opts->num_md_pages = SPDK_BLOB_OPTS_NUM_MD_PAGES;
|
|
opts->max_md_ops = SPDK_BLOB_OPTS_MAX_MD_OPS;
|
|
opts->max_channel_ops = SPDK_BLOB_OPTS_DEFAULT_CHANNEL_OPS;
|
|
opts->clear_method = BS_CLEAR_WITH_UNMAP;
|
|
memset(&opts->bstype, 0, sizeof(opts->bstype));
|
|
opts->iter_cb_fn = NULL;
|
|
opts->iter_cb_arg = NULL;
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_opts_verify(struct spdk_bs_opts *opts)
|
|
{
|
|
if (opts->cluster_sz == 0 || opts->num_md_pages == 0 || opts->max_md_ops == 0 ||
|
|
opts->max_channel_ops == 0) {
|
|
SPDK_ERRLOG("Blobstore options cannot be set to 0\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_alloc(struct spdk_bs_dev *dev, struct spdk_bs_opts *opts, struct spdk_blob_store **_bs)
|
|
{
|
|
struct spdk_blob_store *bs;
|
|
uint64_t dev_size;
|
|
int rc;
|
|
|
|
dev_size = dev->blocklen * dev->blockcnt;
|
|
if (dev_size < opts->cluster_sz) {
|
|
/* Device size cannot be smaller than cluster size of blobstore */
|
|
SPDK_INFOLOG(SPDK_LOG_BLOB, "Device size %" PRIu64 " is smaller than cluster size %" PRIu32 "\n",
|
|
dev_size, opts->cluster_sz);
|
|
return -ENOSPC;
|
|
}
|
|
if (opts->cluster_sz < SPDK_BS_PAGE_SIZE) {
|
|
/* Cluster size cannot be smaller than page size */
|
|
SPDK_ERRLOG("Cluster size %" PRIu32 " is smaller than page size %d\n",
|
|
opts->cluster_sz, SPDK_BS_PAGE_SIZE);
|
|
return -EINVAL;
|
|
}
|
|
bs = calloc(1, sizeof(struct spdk_blob_store));
|
|
if (!bs) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
TAILQ_INIT(&bs->blobs);
|
|
TAILQ_INIT(&bs->snapshots);
|
|
bs->dev = dev;
|
|
bs->md_thread = spdk_get_thread();
|
|
assert(bs->md_thread != NULL);
|
|
|
|
/*
|
|
* Do not use _spdk_bs_lba_to_cluster() here since blockcnt may not be an
|
|
* even multiple of the cluster size.
|
|
*/
|
|
bs->cluster_sz = opts->cluster_sz;
|
|
bs->total_clusters = dev->blockcnt / (bs->cluster_sz / dev->blocklen);
|
|
bs->pages_per_cluster = bs->cluster_sz / SPDK_BS_PAGE_SIZE;
|
|
bs->num_free_clusters = bs->total_clusters;
|
|
bs->used_clusters = spdk_bit_array_create(bs->total_clusters);
|
|
bs->io_unit_size = dev->blocklen;
|
|
if (bs->used_clusters == NULL) {
|
|
free(bs);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bs->max_channel_ops = opts->max_channel_ops;
|
|
bs->super_blob = SPDK_BLOBID_INVALID;
|
|
memcpy(&bs->bstype, &opts->bstype, sizeof(opts->bstype));
|
|
|
|
/* The metadata is assumed to be at least 1 page */
|
|
bs->used_md_pages = spdk_bit_array_create(1);
|
|
bs->used_blobids = spdk_bit_array_create(0);
|
|
|
|
pthread_mutex_init(&bs->used_clusters_mutex, NULL);
|
|
|
|
spdk_io_device_register(bs, _spdk_bs_channel_create, _spdk_bs_channel_destroy,
|
|
sizeof(struct spdk_bs_channel), "blobstore");
|
|
rc = spdk_bs_register_md_thread(bs);
|
|
if (rc == -1) {
|
|
spdk_io_device_unregister(bs, NULL);
|
|
pthread_mutex_destroy(&bs->used_clusters_mutex);
|
|
spdk_bit_array_free(&bs->used_blobids);
|
|
spdk_bit_array_free(&bs->used_md_pages);
|
|
spdk_bit_array_free(&bs->used_clusters);
|
|
free(bs);
|
|
/* FIXME: this is a lie but don't know how to get a proper error code here */
|
|
return -ENOMEM;
|
|
}
|
|
|
|
*_bs = bs;
|
|
return 0;
|
|
}
|
|
|
|
/* START spdk_bs_load, spdk_bs_load_ctx will used for both load and unload. */
|
|
|
|
struct spdk_bs_load_ctx {
|
|
struct spdk_blob_store *bs;
|
|
struct spdk_bs_super_block *super;
|
|
|
|
struct spdk_bs_md_mask *mask;
|
|
bool in_page_chain;
|
|
uint32_t page_index;
|
|
uint32_t cur_page;
|
|
struct spdk_blob_md_page *page;
|
|
|
|
spdk_bs_sequence_t *seq;
|
|
spdk_blob_op_with_handle_complete iter_cb_fn;
|
|
void *iter_cb_arg;
|
|
struct spdk_blob *blob;
|
|
spdk_blob_id blobid;
|
|
};
|
|
|
|
static void
|
|
_spdk_bs_load_ctx_fail(spdk_bs_sequence_t *seq, struct spdk_bs_load_ctx *ctx, int bserrno)
|
|
{
|
|
assert(bserrno != 0);
|
|
|
|
spdk_free(ctx->super);
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
_spdk_bs_free(ctx->bs);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_set_mask(struct spdk_bit_array *array, struct spdk_bs_md_mask *mask)
|
|
{
|
|
uint32_t i = 0;
|
|
|
|
while (true) {
|
|
i = spdk_bit_array_find_first_set(array, i);
|
|
if (i >= mask->length) {
|
|
break;
|
|
}
|
|
mask->mask[i / 8] |= 1U << (i % 8);
|
|
i++;
|
|
}
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_load_mask(struct spdk_bit_array **array_ptr, struct spdk_bs_md_mask *mask)
|
|
{
|
|
struct spdk_bit_array *array;
|
|
uint32_t i;
|
|
|
|
if (spdk_bit_array_resize(array_ptr, mask->length) < 0) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
array = *array_ptr;
|
|
for (i = 0; i < mask->length; i++) {
|
|
if (mask->mask[i / 8] & (1U << (i % 8))) {
|
|
spdk_bit_array_set(array, i);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_write_super(spdk_bs_sequence_t *seq, struct spdk_blob_store *bs,
|
|
struct spdk_bs_super_block *super, spdk_bs_sequence_cpl cb_fn, void *cb_arg)
|
|
{
|
|
/* Update the values in the super block */
|
|
super->super_blob = bs->super_blob;
|
|
memcpy(&super->bstype, &bs->bstype, sizeof(bs->bstype));
|
|
super->crc = _spdk_blob_md_page_calc_crc(super);
|
|
spdk_bs_sequence_write_dev(seq, super, _spdk_bs_page_to_lba(bs, 0),
|
|
_spdk_bs_byte_to_lba(bs, sizeof(*super)),
|
|
cb_fn, cb_arg);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_write_used_clusters(spdk_bs_sequence_t *seq, void *arg, spdk_bs_sequence_cpl cb_fn)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = arg;
|
|
uint64_t mask_size, lba, lba_count;
|
|
|
|
/* Write out the used clusters mask */
|
|
mask_size = ctx->super->used_cluster_mask_len * SPDK_BS_PAGE_SIZE;
|
|
ctx->mask = spdk_zmalloc(mask_size, 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
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;
|
|
|
|
if (seq->bserrno) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, seq->bserrno);
|
|
return;
|
|
}
|
|
|
|
mask_size = ctx->super->used_page_mask_len * SPDK_BS_PAGE_SIZE;
|
|
ctx->mask = spdk_zmalloc(mask_size, 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
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_zmalloc(mask_size, 0x1000, NULL, SPDK_ENV_SOCKET_ID_ANY,
|
|
SPDK_MALLOC_DMA);
|
|
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_blob_set_thin_provision(struct spdk_blob *blob)
|
|
{
|
|
_spdk_blob_verify_md_op(blob);
|
|
blob->invalid_flags |= SPDK_BLOB_THIN_PROV;
|
|
blob->state = SPDK_BLOB_STATE_DIRTY;
|
|
}
|
|
|
|
static void _spdk_bs_load_iter(void *arg, struct spdk_blob *blob, int bserrno);
|
|
|
|
static void
|
|
_spdk_bs_delete_corrupted_blob_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
spdk_blob_id id;
|
|
int64_t page_num;
|
|
|
|
/* Iterate to next blob (we can't use spdk_bs_iter_next function as our
|
|
* last blob has been removed */
|
|
page_num = _spdk_bs_blobid_to_page(ctx->blobid);
|
|
page_num++;
|
|
page_num = spdk_bit_array_find_first_set(ctx->bs->used_blobids, page_num);
|
|
if (page_num >= spdk_bit_array_capacity(ctx->bs->used_blobids)) {
|
|
_spdk_bs_load_iter(ctx, NULL, -ENOENT);
|
|
return;
|
|
}
|
|
|
|
id = _spdk_bs_page_to_blobid(page_num);
|
|
|
|
spdk_bs_open_blob(ctx->bs, id, _spdk_bs_load_iter, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_delete_corrupted_close_cb(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
SPDK_ERRLOG("Failed to close corrupted blob\n");
|
|
spdk_bs_iter_next(ctx->bs, ctx->blob, _spdk_bs_load_iter, ctx);
|
|
return;
|
|
}
|
|
|
|
spdk_bs_delete_blob(ctx->bs, ctx->blobid, _spdk_bs_delete_corrupted_blob_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_delete_corrupted_blob(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
uint64_t i;
|
|
|
|
if (bserrno != 0) {
|
|
SPDK_ERRLOG("Failed to close clone of a corrupted blob\n");
|
|
spdk_bs_iter_next(ctx->bs, ctx->blob, _spdk_bs_load_iter, ctx);
|
|
return;
|
|
}
|
|
|
|
/* Snapshot and clone have the same copy of cluster map at this point.
|
|
* Let's clear cluster map for snpashot now so that it won't be cleared
|
|
* for clone later when we remove snapshot. Also set thin provision to
|
|
* pass data corruption check */
|
|
for (i = 0; i < ctx->blob->active.num_clusters; i++) {
|
|
ctx->blob->active.clusters[i] = 0;
|
|
}
|
|
|
|
ctx->blob->md_ro = false;
|
|
|
|
_spdk_blob_set_thin_provision(ctx->blob);
|
|
|
|
ctx->blobid = ctx->blob->id;
|
|
|
|
spdk_blob_close(ctx->blob, _spdk_bs_delete_corrupted_close_cb, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_update_corrupted_blob(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
SPDK_ERRLOG("Failed to close clone of a corrupted blob\n");
|
|
spdk_bs_iter_next(ctx->bs, ctx->blob, _spdk_bs_load_iter, ctx);
|
|
return;
|
|
}
|
|
|
|
ctx->blob->md_ro = false;
|
|
_spdk_blob_remove_xattr(ctx->blob, SNAPSHOT_PENDING_REMOVAL, true);
|
|
_spdk_blob_remove_xattr(ctx->blob, SNAPSHOT_IN_PROGRESS, true);
|
|
spdk_blob_set_read_only(ctx->blob);
|
|
|
|
if (ctx->iter_cb_fn) {
|
|
ctx->iter_cb_fn(ctx->iter_cb_arg, ctx->blob, 0);
|
|
}
|
|
_spdk_bs_blob_list_add(ctx->blob);
|
|
|
|
spdk_bs_iter_next(ctx->bs, ctx->blob, _spdk_bs_load_iter, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_examine_clone(void *cb_arg, struct spdk_blob *blob, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
SPDK_ERRLOG("Failed to open clone of a corrupted blob\n");
|
|
spdk_bs_iter_next(ctx->bs, ctx->blob, _spdk_bs_load_iter, ctx);
|
|
return;
|
|
}
|
|
|
|
if (blob->parent_id == ctx->blob->id) {
|
|
/* Power failure occured before updating clone (snapshot delete case)
|
|
* or after updating clone (creating snapshot case) - keep snapshot */
|
|
spdk_blob_close(blob, _spdk_bs_update_corrupted_blob, ctx);
|
|
} else {
|
|
/* Power failure occured after updating clone (snapshot delete case)
|
|
* or before updating clone (creating snapshot case) - remove snapshot */
|
|
spdk_blob_close(blob, _spdk_bs_delete_corrupted_blob, ctx);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_load_iter(void *arg, struct spdk_blob *blob, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = arg;
|
|
const void *value;
|
|
size_t len;
|
|
int rc = 0;
|
|
|
|
if (bserrno == 0) {
|
|
/* Examine blob if it is corrupted after power failure. Fix
|
|
* the ones that can be fixed and remove any other corrupted
|
|
* ones. If it is not corrupted just process it */
|
|
rc = _spdk_blob_get_xattr_value(blob, SNAPSHOT_PENDING_REMOVAL, &value, &len, true);
|
|
if (rc != 0) {
|
|
rc = _spdk_blob_get_xattr_value(blob, SNAPSHOT_IN_PROGRESS, &value, &len, true);
|
|
if (rc != 0) {
|
|
/* Not corrupted - process it and continue with iterating through blobs */
|
|
if (ctx->iter_cb_fn) {
|
|
ctx->iter_cb_fn(ctx->iter_cb_arg, blob, 0);
|
|
}
|
|
_spdk_bs_blob_list_add(blob);
|
|
spdk_bs_iter_next(ctx->bs, blob, _spdk_bs_load_iter, ctx);
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
assert(len == sizeof(spdk_blob_id));
|
|
|
|
ctx->blob = blob;
|
|
|
|
/* Open clone to check if we are able to fix this blob or should we remove it */
|
|
spdk_bs_open_blob(ctx->bs, *(spdk_blob_id *)value, _spdk_bs_examine_clone, ctx);
|
|
return;
|
|
} else if (bserrno == -ENOENT) {
|
|
bserrno = 0;
|
|
} else {
|
|
/*
|
|
* This case needs to be looked at further. Same problem
|
|
* exists with applications that rely on explicit blob
|
|
* iteration. We should just skip the blob that failed
|
|
* to load and continue on to the next one.
|
|
*/
|
|
SPDK_ERRLOG("Error in iterating blobs\n");
|
|
}
|
|
|
|
ctx->iter_cb_fn = NULL;
|
|
|
|
spdk_free(ctx->super);
|
|
spdk_free(ctx->mask);
|
|
spdk_bs_sequence_finish(ctx->seq, bserrno);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_load_complete(spdk_bs_sequence_t *seq, struct spdk_bs_load_ctx *ctx, int bserrno)
|
|
{
|
|
ctx->seq = seq;
|
|
spdk_bs_iter_first(ctx->bs, _spdk_bs_load_iter, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_load_used_blobids_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
int rc;
|
|
|
|
/* The type must be correct */
|
|
assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_BLOBIDS);
|
|
|
|
/* The length of the mask (in bits) must not be greater than
|
|
* the length of the buffer (converted to bits) */
|
|
assert(ctx->mask->length <= (ctx->super->used_blobid_mask_len * SPDK_BS_PAGE_SIZE * 8));
|
|
|
|
/* The length of the mask must be exactly equal to the size
|
|
* (in pages) of the metadata region */
|
|
assert(ctx->mask->length == ctx->super->md_len);
|
|
|
|
rc = _spdk_bs_load_mask(&ctx->bs->used_blobids, ctx->mask);
|
|
if (rc < 0) {
|
|
spdk_free(ctx->mask);
|
|
_spdk_bs_load_ctx_fail(seq, ctx, rc);
|
|
return;
|
|
}
|
|
|
|
_spdk_bs_load_complete(seq, ctx, bserrno);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_load_used_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
uint64_t lba, lba_count, mask_size;
|
|
int rc;
|
|
|
|
/* The type must be correct */
|
|
assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_CLUSTERS);
|
|
/* The length of the mask (in bits) must not be greater than the length of the buffer (converted to bits) */
|
|
assert(ctx->mask->length <= (ctx->super->used_cluster_mask_len * sizeof(
|
|
struct spdk_blob_md_page) * 8));
|
|
/* The length of the mask must be exactly equal to the total number of clusters */
|
|
assert(ctx->mask->length == ctx->bs->total_clusters);
|
|
|
|
rc = _spdk_bs_load_mask(&ctx->bs->used_clusters, ctx->mask);
|
|
if (rc < 0) {
|
|
spdk_free(ctx->mask);
|
|
_spdk_bs_load_ctx_fail(seq, ctx, rc);
|
|
return;
|
|
}
|
|
|
|
ctx->bs->num_free_clusters = spdk_bit_array_count_clear(ctx->bs->used_clusters);
|
|
assert(ctx->bs->num_free_clusters <= ctx->bs->total_clusters);
|
|
|
|
spdk_free(ctx->mask);
|
|
|
|
/* Read the used blobids mask */
|
|
mask_size = ctx->super->used_blobid_mask_len * SPDK_BS_PAGE_SIZE;
|
|
ctx->mask = spdk_zmalloc(mask_size, 0x1000, NULL, SPDK_ENV_SOCKET_ID_ANY,
|
|
SPDK_MALLOC_DMA);
|
|
if (!ctx->mask) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_blobid_mask_start);
|
|
lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_blobid_mask_len);
|
|
spdk_bs_sequence_read_dev(seq, ctx->mask, lba, lba_count,
|
|
_spdk_bs_load_used_blobids_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_load_used_pages_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
uint64_t lba, lba_count, mask_size;
|
|
int rc;
|
|
|
|
/* The type must be correct */
|
|
assert(ctx->mask->type == SPDK_MD_MASK_TYPE_USED_PAGES);
|
|
/* The length of the mask (in bits) must not be greater than the length of the buffer (converted to bits) */
|
|
assert(ctx->mask->length <= (ctx->super->used_page_mask_len * SPDK_BS_PAGE_SIZE *
|
|
8));
|
|
/* The length of the mask must be exactly equal to the size (in pages) of the metadata region */
|
|
assert(ctx->mask->length == ctx->super->md_len);
|
|
|
|
rc = _spdk_bs_load_mask(&ctx->bs->used_md_pages, ctx->mask);
|
|
if (rc < 0) {
|
|
spdk_free(ctx->mask);
|
|
_spdk_bs_load_ctx_fail(seq, ctx, rc);
|
|
return;
|
|
}
|
|
|
|
spdk_free(ctx->mask);
|
|
|
|
/* Read the used clusters mask */
|
|
mask_size = ctx->super->used_cluster_mask_len * SPDK_BS_PAGE_SIZE;
|
|
ctx->mask = spdk_zmalloc(mask_size, 0x1000, NULL, SPDK_ENV_SOCKET_ID_ANY,
|
|
SPDK_MALLOC_DMA);
|
|
if (!ctx->mask) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_start);
|
|
lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_cluster_mask_len);
|
|
spdk_bs_sequence_read_dev(seq, ctx->mask, lba, lba_count,
|
|
_spdk_bs_load_used_clusters_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_load_read_used_pages(spdk_bs_sequence_t *seq, void *cb_arg)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
uint64_t lba, lba_count, mask_size;
|
|
|
|
/* Read the used pages mask */
|
|
mask_size = ctx->super->used_page_mask_len * SPDK_BS_PAGE_SIZE;
|
|
ctx->mask = spdk_zmalloc(mask_size, 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
if (!ctx->mask) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_start);
|
|
lba_count = _spdk_bs_page_to_lba(ctx->bs, ctx->super->used_page_mask_len);
|
|
spdk_bs_sequence_read_dev(seq, ctx->mask, lba, lba_count,
|
|
_spdk_bs_load_used_pages_cpl, ctx);
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_load_replay_md_parse_page(const struct spdk_blob_md_page *page, struct spdk_blob_store *bs)
|
|
{
|
|
struct spdk_blob_md_descriptor *desc;
|
|
size_t cur_desc = 0;
|
|
|
|
desc = (struct spdk_blob_md_descriptor *)page->descriptors;
|
|
while (cur_desc < sizeof(page->descriptors)) {
|
|
if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_PADDING) {
|
|
if (desc->length == 0) {
|
|
/* If padding and length are 0, this terminates the page */
|
|
break;
|
|
}
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_EXTENT) {
|
|
struct spdk_blob_md_descriptor_extent *desc_extent;
|
|
unsigned int i, j;
|
|
unsigned int cluster_count = 0;
|
|
uint32_t cluster_idx;
|
|
|
|
desc_extent = (struct spdk_blob_md_descriptor_extent *)desc;
|
|
|
|
for (i = 0; i < desc_extent->length / sizeof(desc_extent->extents[0]); i++) {
|
|
for (j = 0; j < desc_extent->extents[i].length; j++) {
|
|
cluster_idx = desc_extent->extents[i].cluster_idx;
|
|
/*
|
|
* cluster_idx = 0 means an unallocated cluster - don't mark that
|
|
* in the used cluster map.
|
|
*/
|
|
if (cluster_idx != 0) {
|
|
spdk_bit_array_set(bs->used_clusters, cluster_idx + j);
|
|
if (bs->num_free_clusters == 0) {
|
|
return -ENOSPC;
|
|
}
|
|
bs->num_free_clusters--;
|
|
}
|
|
cluster_count++;
|
|
}
|
|
}
|
|
if (cluster_count == 0) {
|
|
return -EINVAL;
|
|
}
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR) {
|
|
/* Skip this item */
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL) {
|
|
/* Skip this item */
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_FLAGS) {
|
|
/* Skip this item */
|
|
} else {
|
|
/* Error */
|
|
return -EINVAL;
|
|
}
|
|
/* Advance to the next descriptor */
|
|
cur_desc += sizeof(*desc) + desc->length;
|
|
if (cur_desc + sizeof(*desc) > sizeof(page->descriptors)) {
|
|
break;
|
|
}
|
|
desc = (struct spdk_blob_md_descriptor *)((uintptr_t)page->descriptors + cur_desc);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool _spdk_bs_load_cur_md_page_valid(struct spdk_bs_load_ctx *ctx)
|
|
{
|
|
uint32_t crc;
|
|
|
|
crc = _spdk_blob_md_page_calc_crc(ctx->page);
|
|
if (crc != ctx->page->crc) {
|
|
return false;
|
|
}
|
|
|
|
if (ctx->page->sequence_num == 0 &&
|
|
_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_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_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 = spdk_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_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_zmalloc(SPDK_BS_PAGE_SIZE, SPDK_BS_PAGE_SIZE,
|
|
NULL, SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
if (!ctx->page) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
_spdk_bs_load_replay_cur_md_page(seq, cb_arg);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_recover(spdk_bs_sequence_t *seq, void *cb_arg)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
int rc;
|
|
|
|
rc = spdk_bit_array_resize(&ctx->bs->used_md_pages, ctx->super->md_len);
|
|
if (rc < 0) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
rc = spdk_bit_array_resize(&ctx->bs->used_blobids, ctx->super->md_len);
|
|
if (rc < 0) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
rc = spdk_bit_array_resize(&ctx->bs->used_clusters, ctx->bs->total_clusters);
|
|
if (rc < 0) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->bs->num_free_clusters = ctx->bs->total_clusters;
|
|
_spdk_bs_load_replay_md(seq, cb_arg);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_load_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
uint32_t crc;
|
|
int rc;
|
|
static const char zeros[SPDK_BLOBSTORE_TYPE_LENGTH];
|
|
|
|
if (ctx->super->version > SPDK_BS_VERSION ||
|
|
ctx->super->version < SPDK_BS_INITIAL_VERSION) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
|
|
return;
|
|
}
|
|
|
|
if (memcmp(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
|
|
sizeof(ctx->super->signature)) != 0) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
|
|
return;
|
|
}
|
|
|
|
crc = _spdk_blob_md_page_calc_crc(ctx->super);
|
|
if (crc != ctx->super->crc) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
|
|
return;
|
|
}
|
|
|
|
if (memcmp(&ctx->bs->bstype, &ctx->super->bstype, SPDK_BLOBSTORE_TYPE_LENGTH) == 0) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Bstype matched - loading blobstore\n");
|
|
} else if (memcmp(&ctx->bs->bstype, zeros, SPDK_BLOBSTORE_TYPE_LENGTH) == 0) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Bstype wildcard used - loading blobstore regardless bstype\n");
|
|
} else {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Unexpected bstype\n");
|
|
SPDK_LOGDUMP(SPDK_LOG_BLOB, "Expected:", ctx->bs->bstype.bstype, SPDK_BLOBSTORE_TYPE_LENGTH);
|
|
SPDK_LOGDUMP(SPDK_LOG_BLOB, "Found:", ctx->super->bstype.bstype, SPDK_BLOBSTORE_TYPE_LENGTH);
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENXIO);
|
|
return;
|
|
}
|
|
|
|
if (ctx->super->size > ctx->bs->dev->blockcnt * ctx->bs->dev->blocklen) {
|
|
SPDK_NOTICELOG("Size mismatch, dev size: %lu, blobstore size: %lu\n",
|
|
ctx->bs->dev->blockcnt * ctx->bs->dev->blocklen, ctx->super->size);
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -EILSEQ);
|
|
return;
|
|
}
|
|
|
|
if (ctx->super->size == 0) {
|
|
ctx->super->size = ctx->bs->dev->blockcnt * ctx->bs->dev->blocklen;
|
|
}
|
|
|
|
if (ctx->super->io_unit_size == 0) {
|
|
ctx->super->io_unit_size = SPDK_BS_PAGE_SIZE;
|
|
}
|
|
|
|
/* Parse the super block */
|
|
ctx->bs->clean = 1;
|
|
ctx->bs->cluster_sz = ctx->super->cluster_size;
|
|
ctx->bs->total_clusters = ctx->super->size / ctx->super->cluster_size;
|
|
ctx->bs->pages_per_cluster = ctx->bs->cluster_sz / SPDK_BS_PAGE_SIZE;
|
|
ctx->bs->io_unit_size = ctx->super->io_unit_size;
|
|
rc = spdk_bit_array_resize(&ctx->bs->used_clusters, ctx->bs->total_clusters);
|
|
if (rc < 0) {
|
|
_spdk_bs_load_ctx_fail(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
ctx->bs->md_start = ctx->super->md_start;
|
|
ctx->bs->md_len = ctx->super->md_len;
|
|
ctx->bs->total_data_clusters = ctx->bs->total_clusters - spdk_divide_round_up(
|
|
ctx->bs->md_start + ctx->bs->md_len, ctx->bs->pages_per_cluster);
|
|
ctx->bs->super_blob = ctx->super->super_blob;
|
|
memcpy(&ctx->bs->bstype, &ctx->super->bstype, sizeof(ctx->super->bstype));
|
|
|
|
if (ctx->super->used_blobid_mask_len == 0 || ctx->super->clean == 0) {
|
|
_spdk_bs_recover(seq, ctx);
|
|
} else {
|
|
_spdk_bs_load_read_used_pages(seq, ctx);
|
|
}
|
|
}
|
|
|
|
void
|
|
spdk_bs_load(struct spdk_bs_dev *dev, struct spdk_bs_opts *o,
|
|
spdk_bs_op_with_handle_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_blob_store *bs;
|
|
struct spdk_bs_cpl cpl;
|
|
spdk_bs_sequence_t *seq;
|
|
struct spdk_bs_load_ctx *ctx;
|
|
struct spdk_bs_opts opts = {};
|
|
int err;
|
|
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Loading blobstore from dev %p\n", dev);
|
|
|
|
if ((SPDK_BS_PAGE_SIZE % dev->blocklen) != 0) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "unsupported dev block length of %d\n", dev->blocklen);
|
|
dev->destroy(dev);
|
|
cb_fn(cb_arg, NULL, -EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (o) {
|
|
opts = *o;
|
|
} else {
|
|
spdk_bs_opts_init(&opts);
|
|
}
|
|
|
|
if (opts.max_md_ops == 0 || opts.max_channel_ops == 0) {
|
|
dev->destroy(dev);
|
|
cb_fn(cb_arg, NULL, -EINVAL);
|
|
return;
|
|
}
|
|
|
|
err = _spdk_bs_alloc(dev, &opts, &bs);
|
|
if (err) {
|
|
dev->destroy(dev);
|
|
cb_fn(cb_arg, NULL, err);
|
|
return;
|
|
}
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (!ctx) {
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, NULL, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->bs = bs;
|
|
ctx->iter_cb_fn = opts.iter_cb_fn;
|
|
ctx->iter_cb_arg = opts.iter_cb_arg;
|
|
|
|
/* Allocate memory for the super block */
|
|
ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
if (!ctx->super) {
|
|
free(ctx);
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, NULL, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
cpl.type = SPDK_BS_CPL_TYPE_BS_HANDLE;
|
|
cpl.u.bs_handle.cb_fn = cb_fn;
|
|
cpl.u.bs_handle.cb_arg = cb_arg;
|
|
cpl.u.bs_handle.bs = bs;
|
|
|
|
seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
|
|
if (!seq) {
|
|
spdk_free(ctx->super);
|
|
free(ctx);
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, NULL, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
/* Read the super block */
|
|
spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
|
|
_spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
|
|
_spdk_bs_load_super_cpl, ctx);
|
|
}
|
|
|
|
/* END spdk_bs_load */
|
|
|
|
/* START spdk_bs_dump */
|
|
|
|
struct spdk_bs_dump_ctx {
|
|
struct spdk_blob_store *bs;
|
|
struct spdk_bs_super_block *super;
|
|
uint32_t cur_page;
|
|
struct spdk_blob_md_page *page;
|
|
spdk_bs_sequence_t *seq;
|
|
FILE *fp;
|
|
spdk_bs_dump_print_xattr print_xattr_fn;
|
|
char xattr_name[4096];
|
|
};
|
|
|
|
static void
|
|
_spdk_bs_dump_finish(spdk_bs_sequence_t *seq, struct spdk_bs_dump_ctx *ctx, int bserrno)
|
|
{
|
|
spdk_free(ctx->super);
|
|
|
|
/*
|
|
* We need to defer calling spdk_bs_call_cpl() until after
|
|
* dev destruction, so tuck these away for later use.
|
|
*/
|
|
ctx->bs->unload_err = bserrno;
|
|
memcpy(&ctx->bs->unload_cpl, &seq->cpl, sizeof(struct spdk_bs_cpl));
|
|
seq->cpl.type = SPDK_BS_CPL_TYPE_NONE;
|
|
|
|
spdk_bs_sequence_finish(seq, 0);
|
|
_spdk_bs_free(ctx->bs);
|
|
free(ctx);
|
|
}
|
|
|
|
static void _spdk_bs_dump_read_md_page(spdk_bs_sequence_t *seq, void *cb_arg);
|
|
|
|
static void
|
|
_spdk_bs_dump_print_md_page(struct spdk_bs_dump_ctx *ctx)
|
|
{
|
|
uint32_t page_idx = ctx->cur_page;
|
|
struct spdk_blob_md_page *page = ctx->page;
|
|
struct spdk_blob_md_descriptor *desc;
|
|
size_t cur_desc = 0;
|
|
uint32_t crc;
|
|
|
|
fprintf(ctx->fp, "=========\n");
|
|
fprintf(ctx->fp, "Metadata Page Index: %" PRIu32 " (0x%" PRIx32 ")\n", page_idx, page_idx);
|
|
fprintf(ctx->fp, "Blob ID: 0x%" PRIx64 "\n", page->id);
|
|
|
|
crc = _spdk_blob_md_page_calc_crc(page);
|
|
fprintf(ctx->fp, "CRC: 0x%" PRIx32 " (%s)\n", page->crc, crc == page->crc ? "OK" : "Mismatch");
|
|
|
|
desc = (struct spdk_blob_md_descriptor *)page->descriptors;
|
|
while (cur_desc < sizeof(page->descriptors)) {
|
|
if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_PADDING) {
|
|
if (desc->length == 0) {
|
|
/* If padding and length are 0, this terminates the page */
|
|
break;
|
|
}
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_EXTENT) {
|
|
struct spdk_blob_md_descriptor_extent *desc_extent;
|
|
unsigned int i;
|
|
|
|
desc_extent = (struct spdk_blob_md_descriptor_extent *)desc;
|
|
|
|
for (i = 0; i < desc_extent->length / sizeof(desc_extent->extents[0]); i++) {
|
|
if (desc_extent->extents[i].cluster_idx != 0) {
|
|
fprintf(ctx->fp, "Allocated Extent - Start: %" PRIu32,
|
|
desc_extent->extents[i].cluster_idx);
|
|
} else {
|
|
fprintf(ctx->fp, "Unallocated Extent - ");
|
|
}
|
|
fprintf(ctx->fp, " Length: %" PRIu32, desc_extent->extents[i].length);
|
|
fprintf(ctx->fp, "\n");
|
|
}
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR) {
|
|
struct spdk_blob_md_descriptor_xattr *desc_xattr;
|
|
uint32_t i;
|
|
|
|
desc_xattr = (struct spdk_blob_md_descriptor_xattr *)desc;
|
|
|
|
if (desc_xattr->length !=
|
|
sizeof(desc_xattr->name_length) + sizeof(desc_xattr->value_length) +
|
|
desc_xattr->name_length + desc_xattr->value_length) {
|
|
}
|
|
|
|
memcpy(ctx->xattr_name, desc_xattr->name, desc_xattr->name_length);
|
|
ctx->xattr_name[desc_xattr->name_length] = '\0';
|
|
fprintf(ctx->fp, "XATTR: name = \"%s\"\n", ctx->xattr_name);
|
|
fprintf(ctx->fp, " value = \"");
|
|
ctx->print_xattr_fn(ctx->fp, ctx->super->bstype.bstype, ctx->xattr_name,
|
|
(void *)((uintptr_t)desc_xattr->name + desc_xattr->name_length),
|
|
desc_xattr->value_length);
|
|
fprintf(ctx->fp, "\"\n");
|
|
for (i = 0; i < desc_xattr->value_length; i++) {
|
|
if (i % 16 == 0) {
|
|
fprintf(ctx->fp, " ");
|
|
}
|
|
fprintf(ctx->fp, "%02" PRIx8 " ", *((uint8_t *)desc_xattr->name + desc_xattr->name_length + i));
|
|
if ((i + 1) % 16 == 0) {
|
|
fprintf(ctx->fp, "\n");
|
|
}
|
|
}
|
|
if (i % 16 != 0) {
|
|
fprintf(ctx->fp, "\n");
|
|
}
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_XATTR_INTERNAL) {
|
|
/* TODO */
|
|
} else if (desc->type == SPDK_MD_DESCRIPTOR_TYPE_FLAGS) {
|
|
/* TODO */
|
|
} else {
|
|
/* Error */
|
|
}
|
|
/* Advance to the next descriptor */
|
|
cur_desc += sizeof(*desc) + desc->length;
|
|
if (cur_desc + sizeof(*desc) > sizeof(page->descriptors)) {
|
|
break;
|
|
}
|
|
desc = (struct spdk_blob_md_descriptor *)((uintptr_t)page->descriptors + cur_desc);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_dump_read_md_page_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_dump_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_dump_finish(seq, ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
if (ctx->page->id != 0) {
|
|
_spdk_bs_dump_print_md_page(ctx);
|
|
}
|
|
|
|
ctx->cur_page++;
|
|
|
|
if (ctx->cur_page < ctx->super->md_len) {
|
|
_spdk_bs_dump_read_md_page(seq, cb_arg);
|
|
} else {
|
|
spdk_free(ctx->page);
|
|
_spdk_bs_dump_finish(seq, ctx, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_dump_read_md_page(spdk_bs_sequence_t *seq, void *cb_arg)
|
|
{
|
|
struct spdk_bs_dump_ctx *ctx = cb_arg;
|
|
uint64_t lba;
|
|
|
|
assert(ctx->cur_page < ctx->super->md_len);
|
|
lba = _spdk_bs_page_to_lba(ctx->bs, ctx->super->md_start + ctx->cur_page);
|
|
spdk_bs_sequence_read_dev(seq, ctx->page, lba,
|
|
_spdk_bs_byte_to_lba(ctx->bs, SPDK_BS_PAGE_SIZE),
|
|
_spdk_bs_dump_read_md_page_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_dump_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_dump_ctx *ctx = cb_arg;
|
|
|
|
fprintf(ctx->fp, "Signature: \"%.8s\" ", ctx->super->signature);
|
|
if (memcmp(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
|
|
sizeof(ctx->super->signature)) != 0) {
|
|
fprintf(ctx->fp, "(Mismatch)\n");
|
|
_spdk_bs_dump_finish(seq, ctx, bserrno);
|
|
return;
|
|
} else {
|
|
fprintf(ctx->fp, "(OK)\n");
|
|
}
|
|
fprintf(ctx->fp, "Version: %" PRIu32 "\n", ctx->super->version);
|
|
fprintf(ctx->fp, "CRC: 0x%x (%s)\n", ctx->super->crc,
|
|
(ctx->super->crc == _spdk_blob_md_page_calc_crc(ctx->super)) ? "OK" : "Mismatch");
|
|
fprintf(ctx->fp, "Blobstore Type: %.*s\n", SPDK_BLOBSTORE_TYPE_LENGTH, ctx->super->bstype.bstype);
|
|
fprintf(ctx->fp, "Cluster Size: %" PRIu32 "\n", ctx->super->cluster_size);
|
|
fprintf(ctx->fp, "Super Blob ID: ");
|
|
if (ctx->super->super_blob == SPDK_BLOBID_INVALID) {
|
|
fprintf(ctx->fp, "(None)\n");
|
|
} else {
|
|
fprintf(ctx->fp, "%" PRIu64 "\n", ctx->super->super_blob);
|
|
}
|
|
fprintf(ctx->fp, "Clean: %" PRIu32 "\n", ctx->super->clean);
|
|
fprintf(ctx->fp, "Used Metadata Page Mask Start: %" PRIu32 "\n", ctx->super->used_page_mask_start);
|
|
fprintf(ctx->fp, "Used Metadata Page Mask Length: %" PRIu32 "\n", ctx->super->used_page_mask_len);
|
|
fprintf(ctx->fp, "Used Cluster Mask Start: %" PRIu32 "\n", ctx->super->used_cluster_mask_start);
|
|
fprintf(ctx->fp, "Used Cluster Mask Length: %" PRIu32 "\n", ctx->super->used_cluster_mask_len);
|
|
fprintf(ctx->fp, "Used Blob ID Mask Start: %" PRIu32 "\n", ctx->super->used_blobid_mask_start);
|
|
fprintf(ctx->fp, "Used Blob ID Mask Length: %" PRIu32 "\n", ctx->super->used_blobid_mask_len);
|
|
fprintf(ctx->fp, "Metadata Start: %" PRIu32 "\n", ctx->super->md_start);
|
|
fprintf(ctx->fp, "Metadata Length: %" PRIu32 "\n", ctx->super->md_len);
|
|
|
|
ctx->cur_page = 0;
|
|
ctx->page = spdk_zmalloc(SPDK_BS_PAGE_SIZE, SPDK_BS_PAGE_SIZE,
|
|
NULL, SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
if (!ctx->page) {
|
|
_spdk_bs_dump_finish(seq, ctx, -ENOMEM);
|
|
return;
|
|
}
|
|
_spdk_bs_dump_read_md_page(seq, cb_arg);
|
|
}
|
|
|
|
void
|
|
spdk_bs_dump(struct spdk_bs_dev *dev, FILE *fp, spdk_bs_dump_print_xattr print_xattr_fn,
|
|
spdk_bs_op_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_blob_store *bs;
|
|
struct spdk_bs_cpl cpl;
|
|
spdk_bs_sequence_t *seq;
|
|
struct spdk_bs_dump_ctx *ctx;
|
|
struct spdk_bs_opts opts = {};
|
|
int err;
|
|
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Dumping blobstore from dev %p\n", dev);
|
|
|
|
spdk_bs_opts_init(&opts);
|
|
|
|
err = _spdk_bs_alloc(dev, &opts, &bs);
|
|
if (err) {
|
|
dev->destroy(dev);
|
|
cb_fn(cb_arg, err);
|
|
return;
|
|
}
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (!ctx) {
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->bs = bs;
|
|
ctx->fp = fp;
|
|
ctx->print_xattr_fn = print_xattr_fn;
|
|
|
|
/* Allocate memory for the super block */
|
|
ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
if (!ctx->super) {
|
|
free(ctx);
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
cpl.type = SPDK_BS_CPL_TYPE_BS_BASIC;
|
|
cpl.u.bs_basic.cb_fn = cb_fn;
|
|
cpl.u.bs_basic.cb_arg = cb_arg;
|
|
|
|
seq = spdk_bs_sequence_start(bs->md_channel, &cpl);
|
|
if (!seq) {
|
|
spdk_free(ctx->super);
|
|
free(ctx);
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
/* Read the super block */
|
|
spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
|
|
_spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
|
|
_spdk_bs_dump_super_cpl, ctx);
|
|
}
|
|
|
|
/* END spdk_bs_dump */
|
|
|
|
/* START spdk_bs_init */
|
|
|
|
struct spdk_bs_init_ctx {
|
|
struct spdk_blob_store *bs;
|
|
struct spdk_bs_super_block *super;
|
|
};
|
|
|
|
static void
|
|
_spdk_bs_init_persist_super_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_init_ctx *ctx = cb_arg;
|
|
|
|
spdk_free(ctx->super);
|
|
free(ctx);
|
|
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_init_trim_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_init_ctx *ctx = cb_arg;
|
|
|
|
/* Write super block */
|
|
spdk_bs_sequence_write_dev(seq, ctx->super, _spdk_bs_page_to_lba(ctx->bs, 0),
|
|
_spdk_bs_byte_to_lba(ctx->bs, sizeof(*ctx->super)),
|
|
_spdk_bs_init_persist_super_cpl, ctx);
|
|
}
|
|
|
|
void
|
|
spdk_bs_init(struct spdk_bs_dev *dev, struct spdk_bs_opts *o,
|
|
spdk_bs_op_with_handle_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_bs_init_ctx *ctx;
|
|
struct spdk_blob_store *bs;
|
|
struct spdk_bs_cpl cpl;
|
|
spdk_bs_sequence_t *seq;
|
|
spdk_bs_batch_t *batch;
|
|
uint64_t num_md_lba;
|
|
uint64_t num_md_pages;
|
|
uint64_t num_md_clusters;
|
|
uint32_t i;
|
|
struct spdk_bs_opts opts = {};
|
|
int rc;
|
|
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Initializing blobstore on dev %p\n", dev);
|
|
|
|
if ((SPDK_BS_PAGE_SIZE % dev->blocklen) != 0) {
|
|
SPDK_ERRLOG("unsupported dev block length of %d\n",
|
|
dev->blocklen);
|
|
dev->destroy(dev);
|
|
cb_fn(cb_arg, NULL, -EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (o) {
|
|
opts = *o;
|
|
} else {
|
|
spdk_bs_opts_init(&opts);
|
|
}
|
|
|
|
if (_spdk_bs_opts_verify(&opts) != 0) {
|
|
dev->destroy(dev);
|
|
cb_fn(cb_arg, NULL, -EINVAL);
|
|
return;
|
|
}
|
|
|
|
rc = _spdk_bs_alloc(dev, &opts, &bs);
|
|
if (rc) {
|
|
dev->destroy(dev);
|
|
cb_fn(cb_arg, NULL, rc);
|
|
return;
|
|
}
|
|
|
|
if (opts.num_md_pages == SPDK_BLOB_OPTS_NUM_MD_PAGES) {
|
|
/* By default, allocate 1 page per cluster.
|
|
* Technically, this over-allocates metadata
|
|
* because more metadata will reduce the number
|
|
* of usable clusters. This can be addressed with
|
|
* more complex math in the future.
|
|
*/
|
|
bs->md_len = bs->total_clusters;
|
|
} else {
|
|
bs->md_len = opts.num_md_pages;
|
|
}
|
|
rc = spdk_bit_array_resize(&bs->used_md_pages, bs->md_len);
|
|
if (rc < 0) {
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, NULL, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
rc = spdk_bit_array_resize(&bs->used_blobids, bs->md_len);
|
|
if (rc < 0) {
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, NULL, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (!ctx) {
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, NULL, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->bs = bs;
|
|
|
|
/* Allocate memory for the super block */
|
|
ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
if (!ctx->super) {
|
|
free(ctx);
|
|
_spdk_bs_free(bs);
|
|
cb_fn(cb_arg, NULL, -ENOMEM);
|
|
return;
|
|
}
|
|
memcpy(ctx->super->signature, SPDK_BS_SUPER_BLOCK_SIG,
|
|
sizeof(ctx->super->signature));
|
|
ctx->super->version = SPDK_BS_VERSION;
|
|
ctx->super->length = sizeof(*ctx->super);
|
|
ctx->super->super_blob = bs->super_blob;
|
|
ctx->super->clean = 0;
|
|
ctx->super->cluster_size = bs->cluster_sz;
|
|
ctx->super->io_unit_size = bs->io_unit_size;
|
|
memcpy(&ctx->super->bstype, &bs->bstype, sizeof(bs->bstype));
|
|
|
|
/* Calculate how many pages the metadata consumes at the front
|
|
* of the disk.
|
|
*/
|
|
|
|
/* The super block uses 1 page */
|
|
num_md_pages = 1;
|
|
|
|
/* The used_md_pages mask requires 1 bit per metadata page, rounded
|
|
* up to the nearest page, plus a header.
|
|
*/
|
|
ctx->super->used_page_mask_start = num_md_pages;
|
|
ctx->super->used_page_mask_len = spdk_divide_round_up(sizeof(struct spdk_bs_md_mask) +
|
|
spdk_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 = spdk_divide_round_up(sizeof(struct spdk_bs_md_mask) +
|
|
spdk_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 = spdk_divide_round_up(sizeof(struct spdk_bs_md_mask) +
|
|
spdk_divide_round_up(bs->md_len, 8),
|
|
SPDK_BS_PAGE_SIZE);
|
|
num_md_pages += ctx->super->used_blobid_mask_len;
|
|
|
|
/* The metadata region size was chosen above */
|
|
ctx->super->md_start = bs->md_start = num_md_pages;
|
|
ctx->super->md_len = bs->md_len;
|
|
num_md_pages += bs->md_len;
|
|
|
|
num_md_lba = _spdk_bs_page_to_lba(bs, num_md_pages);
|
|
|
|
ctx->super->size = dev->blockcnt * dev->blocklen;
|
|
|
|
ctx->super->crc = _spdk_blob_md_page_calc_crc(ctx->super);
|
|
|
|
num_md_clusters = spdk_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_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_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);
|
|
|
|
if (opts.clear_method == BS_CLEAR_WITH_UNMAP) {
|
|
/* Trim data clusters */
|
|
spdk_bs_batch_unmap_dev(batch, num_md_lba, ctx->bs->dev->blockcnt - num_md_lba);
|
|
} else if (opts.clear_method == BS_CLEAR_WITH_WRITE_ZEROES) {
|
|
/* Write_zeroes to data clusters */
|
|
spdk_bs_batch_write_zeroes_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_free(ctx->super);
|
|
|
|
/*
|
|
* We need to defer calling spdk_bs_call_cpl() until after
|
|
* dev destruction, so tuck these away for later use.
|
|
*/
|
|
ctx->bs->unload_err = bserrno;
|
|
memcpy(&ctx->bs->unload_cpl, &seq->cpl, sizeof(struct spdk_bs_cpl));
|
|
seq->cpl.type = SPDK_BS_CPL_TYPE_NONE;
|
|
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
|
|
_spdk_bs_free(ctx->bs);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_unload_write_used_clusters_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_load_ctx *ctx = cb_arg;
|
|
|
|
spdk_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_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_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->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
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_free(ctx->super);
|
|
free(ctx);
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
/* Read super block */
|
|
spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
|
|
_spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
|
|
_spdk_bs_unload_read_super_cpl, ctx);
|
|
}
|
|
|
|
/* END spdk_bs_unload */
|
|
|
|
/* START spdk_bs_set_super */
|
|
|
|
struct spdk_bs_set_super_ctx {
|
|
struct spdk_blob_store *bs;
|
|
struct spdk_bs_super_block *super;
|
|
};
|
|
|
|
static void
|
|
_spdk_bs_set_super_write_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_set_super_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
SPDK_ERRLOG("Unable to write to super block of blobstore\n");
|
|
}
|
|
|
|
spdk_free(ctx->super);
|
|
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_set_super_read_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_bs_set_super_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
SPDK_ERRLOG("Unable to read super block of blobstore\n");
|
|
spdk_free(ctx->super);
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
|
|
_spdk_bs_write_super(seq, ctx->bs, ctx->super, _spdk_bs_set_super_write_cpl, ctx);
|
|
}
|
|
|
|
void
|
|
spdk_bs_set_super(struct spdk_blob_store *bs, spdk_blob_id blobid,
|
|
spdk_bs_op_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_bs_cpl cpl;
|
|
spdk_bs_sequence_t *seq;
|
|
struct spdk_bs_set_super_ctx *ctx;
|
|
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Setting super blob id on blobstore\n");
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (!ctx) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->bs = bs;
|
|
|
|
ctx->super = spdk_zmalloc(sizeof(*ctx->super), 0x1000, NULL,
|
|
SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA);
|
|
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_free(ctx->super);
|
|
free(ctx);
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
bs->super_blob = blobid;
|
|
|
|
/* Read super block */
|
|
spdk_bs_sequence_read_dev(seq, ctx->super, _spdk_bs_page_to_lba(bs, 0),
|
|
_spdk_bs_byte_to_lba(bs, sizeof(*ctx->super)),
|
|
_spdk_bs_set_super_read_cpl, ctx);
|
|
}
|
|
|
|
/* END spdk_bs_set_super */
|
|
|
|
void
|
|
spdk_bs_get_super(struct spdk_blob_store *bs,
|
|
spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
|
|
{
|
|
if (bs->super_blob == SPDK_BLOBID_INVALID) {
|
|
cb_fn(cb_arg, SPDK_BLOBID_INVALID, -ENOENT);
|
|
} else {
|
|
cb_fn(cb_arg, bs->super_blob, 0);
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
spdk_bs_get_cluster_size(struct spdk_blob_store *bs)
|
|
{
|
|
return bs->cluster_sz;
|
|
}
|
|
|
|
uint64_t
|
|
spdk_bs_get_page_size(struct spdk_blob_store *bs)
|
|
{
|
|
return SPDK_BS_PAGE_SIZE;
|
|
}
|
|
|
|
uint64_t
|
|
spdk_bs_get_io_unit_size(struct spdk_blob_store *bs)
|
|
{
|
|
return bs->io_unit_size;
|
|
}
|
|
|
|
uint64_t
|
|
spdk_bs_free_cluster_count(struct spdk_blob_store *bs)
|
|
{
|
|
return bs->num_free_clusters;
|
|
}
|
|
|
|
uint64_t
|
|
spdk_bs_total_data_cluster_count(struct spdk_blob_store *bs)
|
|
{
|
|
return bs->total_data_clusters;
|
|
}
|
|
|
|
static int
|
|
spdk_bs_register_md_thread(struct spdk_blob_store *bs)
|
|
{
|
|
bs->md_channel = spdk_get_io_channel(bs);
|
|
if (!bs->md_channel) {
|
|
SPDK_ERRLOG("Failed to get IO channel.\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
spdk_bs_unregister_md_thread(struct spdk_blob_store *bs)
|
|
{
|
|
spdk_put_io_channel(bs->md_channel);
|
|
|
|
return 0;
|
|
}
|
|
|
|
spdk_blob_id spdk_blob_get_id(struct spdk_blob *blob)
|
|
{
|
|
assert(blob != NULL);
|
|
|
|
return blob->id;
|
|
}
|
|
|
|
uint64_t spdk_blob_get_num_pages(struct spdk_blob *blob)
|
|
{
|
|
assert(blob != NULL);
|
|
|
|
return _spdk_bs_cluster_to_page(blob->bs, blob->active.num_clusters);
|
|
}
|
|
|
|
uint64_t spdk_blob_get_num_io_units(struct spdk_blob *blob)
|
|
{
|
|
assert(blob != NULL);
|
|
|
|
return spdk_blob_get_num_pages(blob) * _spdk_bs_io_unit_per_page(blob->bs);
|
|
}
|
|
|
|
uint64_t spdk_blob_get_num_clusters(struct spdk_blob *blob)
|
|
{
|
|
assert(blob != NULL);
|
|
|
|
return blob->active.num_clusters;
|
|
}
|
|
|
|
/* START spdk_bs_create_blob */
|
|
|
|
static void
|
|
_spdk_bs_create_blob_cpl(spdk_bs_sequence_t *seq, void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_blob *blob = cb_arg;
|
|
|
|
_spdk_blob_free(blob);
|
|
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
}
|
|
|
|
static int
|
|
_spdk_blob_set_xattrs(struct spdk_blob *blob, const struct spdk_blob_xattr_opts *xattrs,
|
|
bool internal)
|
|
{
|
|
uint64_t i;
|
|
size_t value_len = 0;
|
|
int rc;
|
|
const void *value = NULL;
|
|
if (xattrs->count > 0 && xattrs->get_value == NULL) {
|
|
return -EINVAL;
|
|
}
|
|
for (i = 0; i < xattrs->count; i++) {
|
|
xattrs->get_value(xattrs->ctx, xattrs->names[i], &value, &value_len);
|
|
if (value == NULL || value_len == 0) {
|
|
return -EINVAL;
|
|
}
|
|
rc = _spdk_blob_set_xattr(blob, xattrs->names[i], value, value_len, internal);
|
|
if (rc < 0) {
|
|
return rc;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_create_blob(struct spdk_blob_store *bs,
|
|
const struct spdk_blob_opts *opts,
|
|
const struct spdk_blob_xattr_opts *internal_xattrs,
|
|
spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_blob *blob;
|
|
uint32_t page_idx;
|
|
struct spdk_bs_cpl cpl;
|
|
struct spdk_blob_opts opts_default;
|
|
struct spdk_blob_xattr_opts internal_xattrs_default;
|
|
spdk_bs_sequence_t *seq;
|
|
spdk_blob_id id;
|
|
int rc;
|
|
|
|
assert(spdk_get_thread() == bs->md_thread);
|
|
|
|
page_idx = spdk_bit_array_find_first_clear(bs->used_md_pages, 0);
|
|
if (page_idx == UINT32_MAX) {
|
|
cb_fn(cb_arg, 0, -ENOMEM);
|
|
return;
|
|
}
|
|
spdk_bit_array_set(bs->used_blobids, page_idx);
|
|
spdk_bit_array_set(bs->used_md_pages, page_idx);
|
|
|
|
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;
|
|
}
|
|
if (!internal_xattrs) {
|
|
_spdk_blob_xattrs_init(&internal_xattrs_default);
|
|
internal_xattrs = &internal_xattrs_default;
|
|
}
|
|
|
|
rc = _spdk_blob_set_xattrs(blob, &opts->xattrs, false);
|
|
if (rc < 0) {
|
|
_spdk_blob_free(blob);
|
|
cb_fn(cb_arg, 0, rc);
|
|
return;
|
|
}
|
|
|
|
rc = _spdk_blob_set_xattrs(blob, internal_xattrs, true);
|
|
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(bs, NULL, NULL, cb_fn, cb_arg);
|
|
}
|
|
|
|
void spdk_bs_create_blob_ext(struct spdk_blob_store *bs, const struct spdk_blob_opts *opts,
|
|
spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
|
|
{
|
|
_spdk_bs_create_blob(bs, opts, NULL, cb_fn, cb_arg);
|
|
}
|
|
|
|
/* END spdk_bs_create_blob */
|
|
|
|
/* START blob_cleanup */
|
|
|
|
struct spdk_clone_snapshot_ctx {
|
|
struct spdk_bs_cpl cpl;
|
|
int bserrno;
|
|
bool frozen;
|
|
|
|
struct spdk_io_channel *channel;
|
|
|
|
/* Current cluster for inflate operation */
|
|
uint64_t cluster;
|
|
|
|
/* For inflation force allocation of all unallocated clusters and remove
|
|
* thin-provisioning. Otherwise only decouple parent and keep clone thin. */
|
|
bool allocate_all;
|
|
|
|
struct {
|
|
spdk_blob_id id;
|
|
struct spdk_blob *blob;
|
|
} original;
|
|
struct {
|
|
spdk_blob_id id;
|
|
struct spdk_blob *blob;
|
|
} new;
|
|
|
|
/* xattrs specified for snapshot/clones only. They have no impact on
|
|
* the original blobs xattrs. */
|
|
const struct spdk_blob_xattr_opts *xattrs;
|
|
};
|
|
|
|
static void
|
|
_spdk_bs_clone_snapshot_cleanup_finish(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = cb_arg;
|
|
struct spdk_bs_cpl *cpl = &ctx->cpl;
|
|
|
|
if (bserrno != 0) {
|
|
if (ctx->bserrno != 0) {
|
|
SPDK_ERRLOG("Cleanup error %d\n", bserrno);
|
|
} else {
|
|
ctx->bserrno = bserrno;
|
|
}
|
|
}
|
|
|
|
switch (cpl->type) {
|
|
case SPDK_BS_CPL_TYPE_BLOBID:
|
|
cpl->u.blobid.cb_fn(cpl->u.blobid.cb_arg, cpl->u.blobid.blobid, ctx->bserrno);
|
|
break;
|
|
case SPDK_BS_CPL_TYPE_BLOB_BASIC:
|
|
cpl->u.blob_basic.cb_fn(cpl->u.blob_basic.cb_arg, ctx->bserrno);
|
|
break;
|
|
default:
|
|
SPDK_UNREACHABLE();
|
|
break;
|
|
}
|
|
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_snapshot_unfreeze_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *origblob = ctx->original.blob;
|
|
|
|
if (bserrno != 0) {
|
|
if (ctx->bserrno != 0) {
|
|
SPDK_ERRLOG("Unfreeze error %d\n", bserrno);
|
|
} else {
|
|
ctx->bserrno = bserrno;
|
|
}
|
|
}
|
|
|
|
ctx->original.id = origblob->id;
|
|
origblob->locked_operation_in_progress = false;
|
|
|
|
spdk_blob_close(origblob, _spdk_bs_clone_snapshot_cleanup_finish, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *origblob = ctx->original.blob;
|
|
|
|
if (bserrno != 0) {
|
|
if (ctx->bserrno != 0) {
|
|
SPDK_ERRLOG("Cleanup error %d\n", bserrno);
|
|
} else {
|
|
ctx->bserrno = bserrno;
|
|
}
|
|
}
|
|
|
|
if (ctx->frozen) {
|
|
/* Unfreeze any outstanding I/O */
|
|
_spdk_blob_unfreeze_io(origblob, _spdk_bs_snapshot_unfreeze_cpl, ctx);
|
|
} else {
|
|
_spdk_bs_snapshot_unfreeze_cpl(ctx, 0);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_clone_snapshot_newblob_cleanup(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *newblob = ctx->new.blob;
|
|
|
|
if (bserrno != 0) {
|
|
if (ctx->bserrno != 0) {
|
|
SPDK_ERRLOG("Cleanup error %d\n", bserrno);
|
|
} else {
|
|
ctx->bserrno = bserrno;
|
|
}
|
|
}
|
|
|
|
ctx->new.id = newblob->id;
|
|
spdk_blob_close(newblob, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
|
|
}
|
|
|
|
/* END blob_cleanup */
|
|
|
|
/* START spdk_bs_create_snapshot */
|
|
|
|
static void
|
|
_spdk_bs_snapshot_swap_cluster_maps(struct spdk_blob *blob1, struct spdk_blob *blob2)
|
|
{
|
|
uint64_t *cluster_temp;
|
|
|
|
cluster_temp = blob1->active.clusters;
|
|
blob1->active.clusters = blob2->active.clusters;
|
|
blob2->active.clusters = cluster_temp;
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_snapshot_origblob_sync_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *origblob = ctx->original.blob;
|
|
struct spdk_blob *newblob = ctx->new.blob;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_snapshot_swap_cluster_maps(newblob, origblob);
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
/* Remove metadata descriptor SNAPSHOT_IN_PROGRESS */
|
|
bserrno = _spdk_blob_remove_xattr(newblob, SNAPSHOT_IN_PROGRESS, true);
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
_spdk_bs_blob_list_add(ctx->original.blob);
|
|
|
|
spdk_blob_set_read_only(newblob);
|
|
|
|
/* sync snapshot metadata */
|
|
spdk_blob_sync_md(newblob, _spdk_bs_clone_snapshot_origblob_cleanup, cb_arg);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_snapshot_newblob_sync_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *origblob = ctx->original.blob;
|
|
struct spdk_blob *newblob = ctx->new.blob;
|
|
|
|
if (bserrno != 0) {
|
|
/* return cluster map back to original */
|
|
_spdk_bs_snapshot_swap_cluster_maps(newblob, origblob);
|
|
_spdk_bs_clone_snapshot_newblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
/* Set internal xattr for snapshot id */
|
|
bserrno = _spdk_blob_set_xattr(origblob, BLOB_SNAPSHOT, &newblob->id, sizeof(spdk_blob_id), true);
|
|
if (bserrno != 0) {
|
|
/* return cluster map back to original */
|
|
_spdk_bs_snapshot_swap_cluster_maps(newblob, origblob);
|
|
_spdk_bs_clone_snapshot_newblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
_spdk_bs_blob_list_remove(origblob);
|
|
origblob->parent_id = newblob->id;
|
|
|
|
/* Create new back_bs_dev for snapshot */
|
|
origblob->back_bs_dev = spdk_bs_create_blob_bs_dev(newblob);
|
|
if (origblob->back_bs_dev == NULL) {
|
|
/* return cluster map back to original */
|
|
_spdk_bs_snapshot_swap_cluster_maps(newblob, origblob);
|
|
_spdk_bs_clone_snapshot_newblob_cleanup(ctx, -EINVAL);
|
|
return;
|
|
}
|
|
|
|
/* set clone blob as thin provisioned */
|
|
_spdk_blob_set_thin_provision(origblob);
|
|
|
|
_spdk_bs_blob_list_add(newblob);
|
|
|
|
/* sync clone metadata */
|
|
spdk_blob_sync_md(origblob, _spdk_bs_snapshot_origblob_sync_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_snapshot_freeze_cpl(void *cb_arg, int rc)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *origblob = ctx->original.blob;
|
|
struct spdk_blob *newblob = ctx->new.blob;
|
|
int bserrno;
|
|
|
|
if (rc != 0) {
|
|
_spdk_bs_clone_snapshot_newblob_cleanup(ctx, rc);
|
|
return;
|
|
}
|
|
|
|
ctx->frozen = true;
|
|
|
|
/* set new back_bs_dev for snapshot */
|
|
newblob->back_bs_dev = origblob->back_bs_dev;
|
|
/* Set invalid flags from origblob */
|
|
newblob->invalid_flags = origblob->invalid_flags;
|
|
|
|
/* inherit parent from original blob if set */
|
|
newblob->parent_id = origblob->parent_id;
|
|
if (origblob->parent_id != SPDK_BLOBID_INVALID) {
|
|
/* Set internal xattr for snapshot id */
|
|
bserrno = _spdk_blob_set_xattr(newblob, BLOB_SNAPSHOT,
|
|
&origblob->parent_id, sizeof(spdk_blob_id), true);
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_newblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* swap cluster maps */
|
|
_spdk_bs_snapshot_swap_cluster_maps(newblob, origblob);
|
|
|
|
/* sync snapshot metadata */
|
|
spdk_blob_sync_md(newblob, _spdk_bs_snapshot_newblob_sync_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_snapshot_newblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *origblob = ctx->original.blob;
|
|
struct spdk_blob *newblob = _blob;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
ctx->new.blob = newblob;
|
|
|
|
/* Zero out newblob cluster map */
|
|
memset(newblob->active.clusters, 0,
|
|
newblob->active.num_clusters * sizeof(newblob->active.clusters));
|
|
|
|
_spdk_blob_freeze_io(origblob, _spdk_bs_snapshot_freeze_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_snapshot_newblob_create_cpl(void *cb_arg, spdk_blob_id blobid, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *origblob = ctx->original.blob;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
ctx->new.id = blobid;
|
|
ctx->cpl.u.blobid.blobid = blobid;
|
|
|
|
spdk_bs_open_blob(origblob->bs, ctx->new.id, _spdk_bs_snapshot_newblob_open_cpl, ctx);
|
|
}
|
|
|
|
|
|
static void
|
|
_spdk_bs_xattr_snapshot(void *arg, const char *name,
|
|
const void **value, size_t *value_len)
|
|
{
|
|
assert(strncmp(name, SNAPSHOT_IN_PROGRESS, sizeof(SNAPSHOT_IN_PROGRESS)) == 0);
|
|
|
|
struct spdk_blob *blob = (struct spdk_blob *)arg;
|
|
*value = &blob->id;
|
|
*value_len = sizeof(blob->id);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_snapshot_origblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob_opts opts;
|
|
struct spdk_blob_xattr_opts internal_xattrs;
|
|
char *xattrs_names[] = { SNAPSHOT_IN_PROGRESS };
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_cleanup_finish(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
ctx->original.blob = _blob;
|
|
|
|
if (_blob->data_ro || _blob->md_ro) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Cannot create snapshot from read only blob with id %lu\n",
|
|
_blob->id);
|
|
ctx->bserrno = -EINVAL;
|
|
spdk_blob_close(_blob, _spdk_bs_clone_snapshot_cleanup_finish, ctx);
|
|
return;
|
|
}
|
|
|
|
if (_blob->locked_operation_in_progress) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Cannot create snapshot - another operation in progress\n");
|
|
ctx->bserrno = -EBUSY;
|
|
spdk_blob_close(_blob, _spdk_bs_clone_snapshot_cleanup_finish, ctx);
|
|
return;
|
|
}
|
|
|
|
_blob->locked_operation_in_progress = true;
|
|
|
|
spdk_blob_opts_init(&opts);
|
|
_spdk_blob_xattrs_init(&internal_xattrs);
|
|
|
|
/* Change the size of new blob to the same as in original blob,
|
|
* but do not allocate clusters */
|
|
opts.thin_provision = true;
|
|
opts.num_clusters = spdk_blob_get_num_clusters(_blob);
|
|
|
|
/* If there are any xattrs specified for snapshot, set them now */
|
|
if (ctx->xattrs) {
|
|
memcpy(&opts.xattrs, ctx->xattrs, sizeof(*ctx->xattrs));
|
|
}
|
|
/* Set internal xattr SNAPSHOT_IN_PROGRESS */
|
|
internal_xattrs.count = 1;
|
|
internal_xattrs.ctx = _blob;
|
|
internal_xattrs.names = xattrs_names;
|
|
internal_xattrs.get_value = _spdk_bs_xattr_snapshot;
|
|
|
|
_spdk_bs_create_blob(_blob->bs, &opts, &internal_xattrs,
|
|
_spdk_bs_snapshot_newblob_create_cpl, ctx);
|
|
}
|
|
|
|
void spdk_bs_create_snapshot(struct spdk_blob_store *bs, spdk_blob_id blobid,
|
|
const struct spdk_blob_xattr_opts *snapshot_xattrs,
|
|
spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = calloc(1, sizeof(*ctx));
|
|
|
|
if (!ctx) {
|
|
cb_fn(cb_arg, SPDK_BLOBID_INVALID, -ENOMEM);
|
|
return;
|
|
}
|
|
ctx->cpl.type = SPDK_BS_CPL_TYPE_BLOBID;
|
|
ctx->cpl.u.blobid.cb_fn = cb_fn;
|
|
ctx->cpl.u.blobid.cb_arg = cb_arg;
|
|
ctx->cpl.u.blobid.blobid = SPDK_BLOBID_INVALID;
|
|
ctx->bserrno = 0;
|
|
ctx->frozen = false;
|
|
ctx->original.id = blobid;
|
|
ctx->xattrs = snapshot_xattrs;
|
|
|
|
spdk_bs_open_blob(bs, ctx->original.id, _spdk_bs_snapshot_origblob_open_cpl, ctx);
|
|
}
|
|
/* END spdk_bs_create_snapshot */
|
|
|
|
/* START spdk_bs_create_clone */
|
|
|
|
static void
|
|
_spdk_bs_xattr_clone(void *arg, const char *name,
|
|
const void **value, size_t *value_len)
|
|
{
|
|
assert(strncmp(name, BLOB_SNAPSHOT, sizeof(BLOB_SNAPSHOT)) == 0);
|
|
|
|
struct spdk_blob *blob = (struct spdk_blob *)arg;
|
|
*value = &blob->id;
|
|
*value_len = sizeof(blob->id);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_clone_newblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *clone = _blob;
|
|
|
|
ctx->new.blob = clone;
|
|
_spdk_bs_blob_list_add(clone);
|
|
|
|
spdk_blob_close(clone, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_clone_newblob_create_cpl(void *cb_arg, spdk_blob_id blobid, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
|
|
ctx->cpl.u.blobid.blobid = blobid;
|
|
spdk_bs_open_blob(ctx->original.blob->bs, blobid, _spdk_bs_clone_newblob_open_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_clone_origblob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob_opts opts;
|
|
struct spdk_blob_xattr_opts internal_xattrs;
|
|
char *xattr_names[] = { BLOB_SNAPSHOT };
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_cleanup_finish(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
ctx->original.blob = _blob;
|
|
|
|
if (!_blob->data_ro || !_blob->md_ro) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Clone not from read-only blob\n");
|
|
ctx->bserrno = -EINVAL;
|
|
spdk_blob_close(_blob, _spdk_bs_clone_snapshot_cleanup_finish, ctx);
|
|
return;
|
|
}
|
|
|
|
if (_blob->locked_operation_in_progress) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Cannot create clone - another operation in progress\n");
|
|
ctx->bserrno = -EBUSY;
|
|
spdk_blob_close(_blob, _spdk_bs_clone_snapshot_cleanup_finish, ctx);
|
|
return;
|
|
}
|
|
|
|
_blob->locked_operation_in_progress = true;
|
|
|
|
spdk_blob_opts_init(&opts);
|
|
_spdk_blob_xattrs_init(&internal_xattrs);
|
|
|
|
opts.thin_provision = true;
|
|
opts.num_clusters = spdk_blob_get_num_clusters(_blob);
|
|
if (ctx->xattrs) {
|
|
memcpy(&opts.xattrs, ctx->xattrs, sizeof(*ctx->xattrs));
|
|
}
|
|
|
|
/* Set internal xattr BLOB_SNAPSHOT */
|
|
internal_xattrs.count = 1;
|
|
internal_xattrs.ctx = _blob;
|
|
internal_xattrs.names = xattr_names;
|
|
internal_xattrs.get_value = _spdk_bs_xattr_clone;
|
|
|
|
_spdk_bs_create_blob(_blob->bs, &opts, &internal_xattrs,
|
|
_spdk_bs_clone_newblob_create_cpl, ctx);
|
|
}
|
|
|
|
void spdk_bs_create_clone(struct spdk_blob_store *bs, spdk_blob_id blobid,
|
|
const struct spdk_blob_xattr_opts *clone_xattrs,
|
|
spdk_blob_op_with_id_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = calloc(1, sizeof(*ctx));
|
|
|
|
if (!ctx) {
|
|
cb_fn(cb_arg, SPDK_BLOBID_INVALID, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->cpl.type = SPDK_BS_CPL_TYPE_BLOBID;
|
|
ctx->cpl.u.blobid.cb_fn = cb_fn;
|
|
ctx->cpl.u.blobid.cb_arg = cb_arg;
|
|
ctx->cpl.u.blobid.blobid = SPDK_BLOBID_INVALID;
|
|
ctx->bserrno = 0;
|
|
ctx->xattrs = clone_xattrs;
|
|
ctx->original.id = blobid;
|
|
|
|
spdk_bs_open_blob(bs, ctx->original.id, _spdk_bs_clone_origblob_open_cpl, ctx);
|
|
}
|
|
|
|
/* END spdk_bs_create_clone */
|
|
|
|
/* START spdk_bs_inflate_blob */
|
|
|
|
static void
|
|
_spdk_bs_inflate_blob_set_parent_cpl(void *cb_arg, struct spdk_blob *_parent, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *_blob = ctx->original.blob;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
assert(_parent != NULL);
|
|
|
|
_spdk_bs_blob_list_remove(_blob);
|
|
_blob->parent_id = _parent->id;
|
|
_spdk_blob_set_xattr(_blob, BLOB_SNAPSHOT, &_blob->parent_id,
|
|
sizeof(spdk_blob_id), true);
|
|
|
|
_blob->back_bs_dev->destroy(_blob->back_bs_dev);
|
|
_blob->back_bs_dev = spdk_bs_create_blob_bs_dev(_parent);
|
|
_spdk_bs_blob_list_add(_blob);
|
|
|
|
spdk_blob_sync_md(_blob, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_inflate_blob_done(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *_blob = ctx->original.blob;
|
|
struct spdk_blob *_parent;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
if (ctx->allocate_all) {
|
|
/* remove thin provisioning */
|
|
_spdk_bs_blob_list_remove(_blob);
|
|
_spdk_blob_remove_xattr(_blob, BLOB_SNAPSHOT, true);
|
|
_blob->invalid_flags = _blob->invalid_flags & ~SPDK_BLOB_THIN_PROV;
|
|
_blob->back_bs_dev->destroy(_blob->back_bs_dev);
|
|
_blob->back_bs_dev = NULL;
|
|
_blob->parent_id = SPDK_BLOBID_INVALID;
|
|
} else {
|
|
_parent = ((struct spdk_blob_bs_dev *)(_blob->back_bs_dev))->blob;
|
|
if (_parent->parent_id != SPDK_BLOBID_INVALID) {
|
|
/* We must change the parent of the inflated blob */
|
|
spdk_bs_open_blob(_blob->bs, _parent->parent_id,
|
|
_spdk_bs_inflate_blob_set_parent_cpl, ctx);
|
|
return;
|
|
}
|
|
|
|
_spdk_bs_blob_list_remove(_blob);
|
|
_spdk_blob_remove_xattr(_blob, BLOB_SNAPSHOT, true);
|
|
_blob->parent_id = SPDK_BLOBID_INVALID;
|
|
_blob->back_bs_dev->destroy(_blob->back_bs_dev);
|
|
_blob->back_bs_dev = spdk_bs_create_zeroes_dev();
|
|
}
|
|
|
|
_blob->state = SPDK_BLOB_STATE_DIRTY;
|
|
spdk_blob_sync_md(_blob, _spdk_bs_clone_snapshot_origblob_cleanup, ctx);
|
|
}
|
|
|
|
/* Check if cluster needs allocation */
|
|
static inline bool
|
|
_spdk_bs_cluster_needs_allocation(struct spdk_blob *blob, uint64_t cluster, bool allocate_all)
|
|
{
|
|
struct spdk_blob_bs_dev *b;
|
|
|
|
assert(blob != NULL);
|
|
|
|
if (blob->active.clusters[cluster] != 0) {
|
|
/* Cluster is already allocated */
|
|
return false;
|
|
}
|
|
|
|
if (blob->parent_id == SPDK_BLOBID_INVALID) {
|
|
/* Blob have no parent blob */
|
|
return allocate_all;
|
|
}
|
|
|
|
b = (struct spdk_blob_bs_dev *)blob->back_bs_dev;
|
|
return (allocate_all || b->blob->active.clusters[cluster] != 0);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_inflate_blob_touch_next(void *cb_arg, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
struct spdk_blob *_blob = ctx->original.blob;
|
|
uint64_t offset;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
for (; ctx->cluster < _blob->active.num_clusters; ctx->cluster++) {
|
|
if (_spdk_bs_cluster_needs_allocation(_blob, ctx->cluster, ctx->allocate_all)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ctx->cluster < _blob->active.num_clusters) {
|
|
offset = _spdk_bs_cluster_to_lba(_blob->bs, ctx->cluster);
|
|
|
|
/* We may safely increment a cluster before write */
|
|
ctx->cluster++;
|
|
|
|
/* Use zero length write to touch a cluster */
|
|
spdk_blob_io_write(_blob, ctx->channel, NULL, offset, 0,
|
|
_spdk_bs_inflate_blob_touch_next, ctx);
|
|
} else {
|
|
_spdk_bs_inflate_blob_done(cb_arg, bserrno);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_inflate_blob_open_cpl(void *cb_arg, struct spdk_blob *_blob, int bserrno)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = (struct spdk_clone_snapshot_ctx *)cb_arg;
|
|
uint64_t lfc; /* lowest free cluster */
|
|
uint64_t i;
|
|
|
|
if (bserrno != 0) {
|
|
_spdk_bs_clone_snapshot_cleanup_finish(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
ctx->original.blob = _blob;
|
|
|
|
if (_blob->locked_operation_in_progress) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Cannot inflate blob - another operation in progress\n");
|
|
ctx->bserrno = -EBUSY;
|
|
spdk_blob_close(_blob, _spdk_bs_clone_snapshot_cleanup_finish, ctx);
|
|
return;
|
|
}
|
|
|
|
_blob->locked_operation_in_progress = true;
|
|
|
|
if (!ctx->allocate_all && _blob->parent_id == SPDK_BLOBID_INVALID) {
|
|
/* This blob have no parent, so we cannot decouple it. */
|
|
SPDK_ERRLOG("Cannot decouple parent of blob with no parent.\n");
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, -EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (spdk_blob_is_thin_provisioned(_blob) == false) {
|
|
/* This is not thin provisioned blob. No need to inflate. */
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, 0);
|
|
return;
|
|
}
|
|
|
|
/* Do two passes - one to verify that we can obtain enough clusters
|
|
* and another to actually claim them.
|
|
*/
|
|
lfc = 0;
|
|
for (i = 0; i < _blob->active.num_clusters; i++) {
|
|
if (_spdk_bs_cluster_needs_allocation(_blob, i, ctx->allocate_all)) {
|
|
lfc = spdk_bit_array_find_first_clear(_blob->bs->used_clusters, lfc);
|
|
if (lfc == UINT32_MAX) {
|
|
/* No more free clusters. Cannot satisfy the request */
|
|
_spdk_bs_clone_snapshot_origblob_cleanup(ctx, -ENOSPC);
|
|
return;
|
|
}
|
|
lfc++;
|
|
}
|
|
}
|
|
|
|
ctx->cluster = 0;
|
|
_spdk_bs_inflate_blob_touch_next(ctx, 0);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_inflate_blob(struct spdk_blob_store *bs, struct spdk_io_channel *channel,
|
|
spdk_blob_id blobid, bool allocate_all, spdk_blob_op_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_clone_snapshot_ctx *ctx = calloc(1, sizeof(*ctx));
|
|
|
|
if (!ctx) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
ctx->cpl.type = SPDK_BS_CPL_TYPE_BLOB_BASIC;
|
|
ctx->cpl.u.bs_basic.cb_fn = cb_fn;
|
|
ctx->cpl.u.bs_basic.cb_arg = cb_arg;
|
|
ctx->bserrno = 0;
|
|
ctx->original.id = blobid;
|
|
ctx->channel = channel;
|
|
ctx->allocate_all = allocate_all;
|
|
|
|
spdk_bs_open_blob(bs, ctx->original.id, _spdk_bs_inflate_blob_open_cpl, ctx);
|
|
}
|
|
|
|
void
|
|
spdk_bs_inflate_blob(struct spdk_blob_store *bs, struct spdk_io_channel *channel,
|
|
spdk_blob_id blobid, spdk_blob_op_complete cb_fn, void *cb_arg)
|
|
{
|
|
_spdk_bs_inflate_blob(bs, channel, blobid, true, cb_fn, cb_arg);
|
|
}
|
|
|
|
void
|
|
spdk_bs_blob_decouple_parent(struct spdk_blob_store *bs, struct spdk_io_channel *channel,
|
|
spdk_blob_id blobid, spdk_blob_op_complete cb_fn, void *cb_arg)
|
|
{
|
|
_spdk_bs_inflate_blob(bs, channel, blobid, false, cb_fn, cb_arg);
|
|
}
|
|
/* END spdk_bs_inflate_blob */
|
|
|
|
/* START spdk_blob_resize */
|
|
struct spdk_bs_resize_ctx {
|
|
spdk_blob_op_complete cb_fn;
|
|
void *cb_arg;
|
|
struct spdk_blob *blob;
|
|
uint64_t sz;
|
|
int rc;
|
|
};
|
|
|
|
static void
|
|
_spdk_bs_resize_unfreeze_cpl(void *cb_arg, int rc)
|
|
{
|
|
struct spdk_bs_resize_ctx *ctx = (struct spdk_bs_resize_ctx *)cb_arg;
|
|
|
|
if (rc != 0) {
|
|
SPDK_ERRLOG("Unfreeze failed, rc=%d\n", rc);
|
|
}
|
|
|
|
if (ctx->rc != 0) {
|
|
SPDK_ERRLOG("Unfreeze failed, ctx->rc=%d\n", ctx->rc);
|
|
rc = ctx->rc;
|
|
}
|
|
|
|
ctx->blob->locked_operation_in_progress = false;
|
|
|
|
ctx->cb_fn(ctx->cb_arg, rc);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_resize_freeze_cpl(void *cb_arg, int rc)
|
|
{
|
|
struct spdk_bs_resize_ctx *ctx = (struct spdk_bs_resize_ctx *)cb_arg;
|
|
|
|
if (rc != 0) {
|
|
ctx->blob->locked_operation_in_progress = false;
|
|
ctx->cb_fn(ctx->cb_arg, rc);
|
|
free(ctx);
|
|
return;
|
|
}
|
|
|
|
ctx->rc = _spdk_blob_resize(ctx->blob, ctx->sz);
|
|
|
|
_spdk_blob_unfreeze_io(ctx->blob, _spdk_bs_resize_unfreeze_cpl, ctx);
|
|
}
|
|
|
|
void
|
|
spdk_blob_resize(struct spdk_blob *blob, uint64_t sz, spdk_blob_op_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_bs_resize_ctx *ctx;
|
|
|
|
_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) {
|
|
cb_fn(cb_arg, -EPERM);
|
|
return;
|
|
}
|
|
|
|
if (sz == blob->active.num_clusters) {
|
|
cb_fn(cb_arg, 0);
|
|
return;
|
|
}
|
|
|
|
if (blob->locked_operation_in_progress) {
|
|
cb_fn(cb_arg, -EBUSY);
|
|
return;
|
|
}
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (!ctx) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
blob->locked_operation_in_progress = true;
|
|
ctx->cb_fn = cb_fn;
|
|
ctx->cb_arg = cb_arg;
|
|
ctx->blob = blob;
|
|
ctx->sz = sz;
|
|
_spdk_blob_freeze_io(blob, _spdk_bs_resize_freeze_cpl, ctx);
|
|
}
|
|
|
|
/* END spdk_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);
|
|
}
|
|
|
|
struct delete_snapshot_ctx {
|
|
struct spdk_blob_list *parent_snapshot_entry;
|
|
struct spdk_blob *snapshot;
|
|
bool snapshot_md_ro;
|
|
struct spdk_blob *clone;
|
|
bool clone_md_ro;
|
|
spdk_blob_op_with_handle_complete cb_fn;
|
|
void *cb_arg;
|
|
int bserrno;
|
|
};
|
|
|
|
static void
|
|
_spdk_delete_blob_cleanup_finish(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
SPDK_ERRLOG("Snapshot cleanup error %d\n", bserrno);
|
|
}
|
|
|
|
assert(ctx != NULL);
|
|
|
|
if (bserrno != 0 && ctx->bserrno == 0) {
|
|
ctx->bserrno = bserrno;
|
|
}
|
|
|
|
ctx->cb_fn(ctx->cb_arg, ctx->snapshot, ctx->bserrno);
|
|
free(ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_cleanup_snapshot(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno != 0) {
|
|
ctx->bserrno = bserrno;
|
|
SPDK_ERRLOG("Clone cleanup error %d\n", bserrno);
|
|
}
|
|
|
|
/* open_ref == 1 menas that only deletion context has opened this snapshot
|
|
* open_ref == 2 menas that clone has opened this snapshot as well,
|
|
* so we have to add it back to the blobs list */
|
|
if (ctx->snapshot->open_ref == 2) {
|
|
TAILQ_INSERT_HEAD(&ctx->snapshot->bs->blobs, ctx->snapshot, link);
|
|
}
|
|
|
|
ctx->snapshot->locked_operation_in_progress = false;
|
|
ctx->snapshot->md_ro = ctx->snapshot_md_ro;
|
|
|
|
spdk_blob_close(ctx->snapshot, _spdk_delete_blob_cleanup_finish, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_cleanup_clone(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
|
|
ctx->clone->locked_operation_in_progress = false;
|
|
ctx->clone->md_ro = ctx->clone_md_ro;
|
|
|
|
spdk_blob_close(ctx->clone, _spdk_delete_snapshot_cleanup_snapshot, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_unfreeze_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno) {
|
|
ctx->bserrno = bserrno;
|
|
_spdk_delete_snapshot_cleanup_clone(ctx, 0);
|
|
return;
|
|
}
|
|
|
|
ctx->clone->locked_operation_in_progress = false;
|
|
spdk_blob_close(ctx->clone, _spdk_delete_blob_cleanup_finish, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_sync_snapshot_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
struct spdk_blob_list *parent_snapshot_entry = NULL;
|
|
struct spdk_blob_list *snapshot_entry = NULL;
|
|
struct spdk_blob_list *clone_entry = NULL;
|
|
struct spdk_blob_list *snapshot_clone_entry = NULL;
|
|
|
|
if (bserrno) {
|
|
SPDK_ERRLOG("Failed to sync MD on blob\n");
|
|
ctx->bserrno = bserrno;
|
|
_spdk_delete_snapshot_cleanup_clone(ctx, 0);
|
|
return;
|
|
}
|
|
|
|
/* Get snapshot entry for the snapshot we want to remove */
|
|
snapshot_entry = _spdk_bs_get_snapshot_entry(ctx->snapshot->bs, ctx->snapshot->id);
|
|
|
|
assert(snapshot_entry != NULL);
|
|
|
|
/* Remove clone entry in this snapshot (at this point there can be only one clone) */
|
|
clone_entry = TAILQ_FIRST(&snapshot_entry->clones);
|
|
assert(clone_entry != NULL);
|
|
TAILQ_REMOVE(&snapshot_entry->clones, clone_entry, link);
|
|
snapshot_entry->clone_count--;
|
|
assert(TAILQ_EMPTY(&snapshot_entry->clones));
|
|
|
|
if (ctx->snapshot->parent_id != SPDK_BLOBID_INVALID) {
|
|
/* This snapshot is at the same time a clone of another snapshot - we need to
|
|
* update parent snapshot (remove current clone, add new one inherited from
|
|
* the snapshot that is being removed) */
|
|
|
|
/* Get snapshot entry for parent snapshot and clone entry within that snapshot for
|
|
* snapshot that we are removing */
|
|
_spdk_blob_get_snapshot_and_clone_entries(ctx->snapshot, &parent_snapshot_entry,
|
|
&snapshot_clone_entry);
|
|
|
|
/* Switch clone entry in parent snapshot */
|
|
TAILQ_INSERT_TAIL(&parent_snapshot_entry->clones, clone_entry, link);
|
|
TAILQ_REMOVE(&parent_snapshot_entry->clones, snapshot_clone_entry, link);
|
|
free(snapshot_clone_entry);
|
|
} else {
|
|
/* No parent snapshot - just remove clone entry */
|
|
free(clone_entry);
|
|
}
|
|
|
|
/* Restore md_ro flags */
|
|
ctx->clone->md_ro = ctx->clone_md_ro;
|
|
ctx->snapshot->md_ro = ctx->snapshot_md_ro;
|
|
|
|
_spdk_blob_unfreeze_io(ctx->clone, _spdk_delete_snapshot_unfreeze_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_sync_clone_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
uint64_t i;
|
|
|
|
ctx->snapshot->md_ro = false;
|
|
|
|
if (bserrno) {
|
|
SPDK_ERRLOG("Failed to sync MD on clone\n");
|
|
ctx->bserrno = bserrno;
|
|
|
|
/* Restore snapshot to previous state */
|
|
bserrno = _spdk_blob_remove_xattr(ctx->snapshot, SNAPSHOT_PENDING_REMOVAL, true);
|
|
if (bserrno != 0) {
|
|
_spdk_delete_snapshot_cleanup_clone(ctx, bserrno);
|
|
return;
|
|
}
|
|
|
|
spdk_blob_sync_md(ctx->snapshot, _spdk_delete_snapshot_cleanup_clone, ctx);
|
|
return;
|
|
}
|
|
|
|
/* Clear cluster map entries for snapshot */
|
|
for (i = 0; i < ctx->snapshot->active.num_clusters && i < ctx->clone->active.num_clusters; i++) {
|
|
if (ctx->clone->active.clusters[i] == ctx->snapshot->active.clusters[i]) {
|
|
ctx->snapshot->active.clusters[i] = 0;
|
|
}
|
|
}
|
|
|
|
ctx->snapshot->state = SPDK_BLOB_STATE_DIRTY;
|
|
|
|
if (ctx->parent_snapshot_entry != NULL) {
|
|
ctx->snapshot->back_bs_dev = NULL;
|
|
}
|
|
|
|
spdk_blob_sync_md(ctx->snapshot, _spdk_delete_snapshot_sync_snapshot_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_sync_snapshot_xattr_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
uint64_t i;
|
|
|
|
/* Temporarily override md_ro flag for clone for MD modification */
|
|
ctx->clone_md_ro = ctx->clone->md_ro;
|
|
ctx->clone->md_ro = false;
|
|
|
|
if (bserrno) {
|
|
SPDK_ERRLOG("Failed to sync MD with xattr on blob\n");
|
|
ctx->bserrno = bserrno;
|
|
_spdk_delete_snapshot_cleanup_clone(ctx, 0);
|
|
return;
|
|
}
|
|
|
|
/* Copy snapshot map to clone map (only unallocated clusters in clone) */
|
|
for (i = 0; i < ctx->snapshot->active.num_clusters && i < ctx->clone->active.num_clusters; i++) {
|
|
if (ctx->clone->active.clusters[i] == 0) {
|
|
ctx->clone->active.clusters[i] = ctx->snapshot->active.clusters[i];
|
|
}
|
|
}
|
|
|
|
/* Delete old backing bs_dev from clone (related to snapshot that will be removed) */
|
|
ctx->clone->back_bs_dev->destroy(ctx->clone->back_bs_dev);
|
|
|
|
/* Set/remove snapshot xattr and switch parent ID and backing bs_dev on clone... */
|
|
if (ctx->parent_snapshot_entry != NULL) {
|
|
/* ...to parent snapshot */
|
|
ctx->clone->parent_id = ctx->parent_snapshot_entry->id;
|
|
ctx->clone->back_bs_dev = ctx->snapshot->back_bs_dev;
|
|
_spdk_blob_set_xattr(ctx->clone, BLOB_SNAPSHOT, &ctx->parent_snapshot_entry->id,
|
|
sizeof(spdk_blob_id),
|
|
true);
|
|
} else {
|
|
/* ...to blobid invalid and zeroes dev */
|
|
ctx->clone->parent_id = SPDK_BLOBID_INVALID;
|
|
ctx->clone->back_bs_dev = spdk_bs_create_zeroes_dev();
|
|
_spdk_blob_remove_xattr(ctx->clone, BLOB_SNAPSHOT, true);
|
|
}
|
|
|
|
spdk_blob_sync_md(ctx->clone, _spdk_delete_snapshot_sync_clone_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_freeze_io_cb(void *cb_arg, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno) {
|
|
SPDK_ERRLOG("Failed to freeze I/O on clone\n");
|
|
ctx->bserrno = bserrno;
|
|
_spdk_delete_snapshot_cleanup_clone(ctx, 0);
|
|
return;
|
|
}
|
|
|
|
/* Temporarily override md_ro flag for snapshot for MD modification */
|
|
ctx->snapshot_md_ro = ctx->snapshot->md_ro;
|
|
ctx->snapshot->md_ro = false;
|
|
|
|
/* Mark blob as pending for removal for power failure safety, use clone id for recovery */
|
|
ctx->bserrno = _spdk_blob_set_xattr(ctx->snapshot, SNAPSHOT_PENDING_REMOVAL, &ctx->clone->id,
|
|
sizeof(spdk_blob_id), true);
|
|
if (ctx->bserrno != 0) {
|
|
_spdk_delete_snapshot_cleanup_clone(ctx, 0);
|
|
return;
|
|
}
|
|
|
|
spdk_blob_sync_md(ctx->snapshot, _spdk_delete_snapshot_sync_snapshot_xattr_cpl, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_delete_snapshot_open_clone_cb(void *cb_arg, struct spdk_blob *clone, int bserrno)
|
|
{
|
|
struct delete_snapshot_ctx *ctx = cb_arg;
|
|
|
|
if (bserrno) {
|
|
SPDK_ERRLOG("Failed to open clone\n");
|
|
ctx->bserrno = bserrno;
|
|
_spdk_delete_snapshot_cleanup_snapshot(ctx, 0);
|
|
return;
|
|
}
|
|
|
|
ctx->clone = clone;
|
|
|
|
if (clone->locked_operation_in_progress) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Cannot remove blob - another operation in progress on its clone\n");
|
|
ctx->bserrno = -EBUSY;
|
|
spdk_blob_close(ctx->clone, _spdk_delete_snapshot_cleanup_snapshot, ctx);
|
|
return;
|
|
}
|
|
|
|
clone->locked_operation_in_progress = true;
|
|
|
|
_spdk_blob_freeze_io(clone, _spdk_delete_snapshot_freeze_io_cb, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_update_clone_on_snapshot_deletion(struct spdk_blob *snapshot, struct delete_snapshot_ctx *ctx)
|
|
{
|
|
struct spdk_blob_list *snapshot_entry = NULL;
|
|
struct spdk_blob_list *clone_entry = NULL;
|
|
struct spdk_blob_list *snapshot_clone_entry = NULL;
|
|
|
|
/* Get snapshot entry for the snapshot we want to remove */
|
|
snapshot_entry = _spdk_bs_get_snapshot_entry(snapshot->bs, snapshot->id);
|
|
|
|
assert(snapshot_entry != NULL);
|
|
|
|
/* Get clone of the snapshot (at this point there can be only one clone) */
|
|
clone_entry = TAILQ_FIRST(&snapshot_entry->clones);
|
|
assert(snapshot_entry->clone_count == 1);
|
|
assert(clone_entry != NULL);
|
|
|
|
/* Get snapshot entry for parent snapshot and clone entry within that snapshot for
|
|
* snapshot that we are removing */
|
|
_spdk_blob_get_snapshot_and_clone_entries(snapshot, &ctx->parent_snapshot_entry,
|
|
&snapshot_clone_entry);
|
|
|
|
spdk_bs_open_blob(snapshot->bs, clone_entry->id, _spdk_delete_snapshot_open_clone_cb, ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_delete_blob_finish(void *cb_arg, struct spdk_blob *blob, int bserrno)
|
|
{
|
|
spdk_bs_sequence_t *seq = cb_arg;
|
|
struct spdk_blob_list *snapshot_entry = NULL;
|
|
uint32_t page_num;
|
|
|
|
if (bserrno) {
|
|
SPDK_ERRLOG("Failed to remove blob\n");
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
return;
|
|
}
|
|
|
|
/* Remove snapshot from the list */
|
|
snapshot_entry = _spdk_bs_get_snapshot_entry(blob->bs, blob->id);
|
|
if (snapshot_entry != NULL) {
|
|
TAILQ_REMOVE(&blob->bs->snapshots, snapshot_entry, link);
|
|
free(snapshot_entry);
|
|
}
|
|
|
|
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_blob_resize(blob, 0);
|
|
|
|
_spdk_blob_persist(seq, blob, _spdk_bs_delete_persist_cpl, blob);
|
|
}
|
|
|
|
static int
|
|
_spdk_bs_is_blob_deletable(struct spdk_blob *blob, bool *update_clone)
|
|
{
|
|
struct spdk_blob_list *snapshot_entry = NULL;
|
|
struct spdk_blob_list *clone_entry = NULL;
|
|
struct spdk_blob *clone = NULL;
|
|
bool has_one_clone = false;
|
|
|
|
/* Check if this is a snapshot with clones */
|
|
snapshot_entry = _spdk_bs_get_snapshot_entry(blob->bs, blob->id);
|
|
if (snapshot_entry != NULL) {
|
|
if (snapshot_entry->clone_count > 1) {
|
|
SPDK_ERRLOG("Cannot remove snapshot with more than one clone\n");
|
|
return -EBUSY;
|
|
} else if (snapshot_entry->clone_count == 1) {
|
|
has_one_clone = true;
|
|
}
|
|
}
|
|
|
|
/* Check if someone has this blob open (besides this delete context):
|
|
* - open_ref = 1 - only this context opened blob, so it is ok to remove it
|
|
* - open_ref <= 2 && has_one_clone = true - clone is holding snapshot
|
|
* and that is ok, because we will update it accordingly */
|
|
if (blob->open_ref <= 2 && has_one_clone) {
|
|
clone_entry = TAILQ_FIRST(&snapshot_entry->clones);
|
|
assert(clone_entry != NULL);
|
|
clone = _spdk_blob_lookup(blob->bs, clone_entry->id);
|
|
|
|
if (blob->open_ref == 2 && clone == NULL) {
|
|
/* Clone is closed and someone else opened this blob */
|
|
SPDK_ERRLOG("Cannot remove snapshot because it is open\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
*update_clone = true;
|
|
return 0;
|
|
}
|
|
|
|
if (blob->open_ref > 1) {
|
|
SPDK_ERRLOG("Cannot remove snapshot because it is open\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
assert(has_one_clone == false);
|
|
*update_clone = false;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_delete_enomem_close_cpl(void *cb_arg, int bserrno)
|
|
{
|
|
spdk_bs_sequence_t *seq = cb_arg;
|
|
|
|
spdk_bs_sequence_finish(seq, -ENOMEM);
|
|
}
|
|
|
|
static void
|
|
_spdk_bs_delete_open_cpl(void *cb_arg, struct spdk_blob *blob, int bserrno)
|
|
{
|
|
spdk_bs_sequence_t *seq = cb_arg;
|
|
struct delete_snapshot_ctx *ctx;
|
|
bool update_clone = false;
|
|
|
|
if (bserrno != 0) {
|
|
spdk_bs_sequence_finish(seq, bserrno);
|
|
return;
|
|
}
|
|
|
|
_spdk_blob_verify_md_op(blob);
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (ctx == NULL) {
|
|
spdk_blob_close(blob, _spdk_bs_delete_enomem_close_cpl, seq);
|
|
return;
|
|
}
|
|
|
|
ctx->snapshot = blob;
|
|
ctx->cb_fn = _spdk_bs_delete_blob_finish;
|
|
ctx->cb_arg = seq;
|
|
|
|
/* Check if blob can be removed and if it is a snapshot with clone on top of it */
|
|
ctx->bserrno = _spdk_bs_is_blob_deletable(blob, &update_clone);
|
|
if (ctx->bserrno) {
|
|
spdk_blob_close(blob, _spdk_delete_blob_cleanup_finish, ctx);
|
|
return;
|
|
}
|
|
|
|
if (blob->locked_operation_in_progress) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Cannot remove blob - another operation in progress\n");
|
|
ctx->bserrno = -EBUSY;
|
|
spdk_blob_close(blob, _spdk_delete_blob_cleanup_finish, ctx);
|
|
return;
|
|
}
|
|
|
|
blob->locked_operation_in_progress = true;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
if (update_clone) {
|
|
/* This blob is a snapshot with active clone - update clone first */
|
|
_spdk_update_clone_on_snapshot_deletion(blob, ctx);
|
|
} else {
|
|
/* This blob does not have any clones - just remove it */
|
|
_spdk_bs_blob_list_remove(blob);
|
|
_spdk_bs_delete_blob_finish(seq, blob, 0);
|
|
free(ctx);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void _spdk_bs_open_blob(struct spdk_blob_store *bs, spdk_blob_id blobid,
|
|
struct spdk_blob_open_opts *opts, spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_blob *blob;
|
|
struct spdk_bs_cpl cpl;
|
|
struct spdk_blob_open_opts opts_default;
|
|
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;
|
|
}
|
|
|
|
if (!opts) {
|
|
spdk_blob_open_opts_init(&opts_default);
|
|
opts = &opts_default;
|
|
}
|
|
|
|
blob->clear_method = opts->clear_method;
|
|
|
|
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);
|
|
}
|
|
|
|
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)
|
|
{
|
|
_spdk_bs_open_blob(bs, blobid, NULL, cb_fn, cb_arg);
|
|
}
|
|
|
|
void spdk_bs_open_blob_ext(struct spdk_blob_store *bs, spdk_blob_id blobid,
|
|
struct spdk_blob_open_opts *opts, spdk_blob_op_with_handle_complete cb_fn, void *cb_arg)
|
|
{
|
|
_spdk_bs_open_blob(bs, blobid, opts, cb_fn, cb_arg);
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
static void
|
|
_spdk_blob_insert_cluster_on_md_thread(struct spdk_blob *blob, uint32_t cluster_num,
|
|
uint64_t cluster, spdk_blob_op_complete cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_blob_insert_cluster_ctx *ctx;
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (ctx == NULL) {
|
|
cb_fn(cb_arg, -ENOMEM);
|
|
return;
|
|
}
|
|
|
|
ctx->thread = spdk_get_thread();
|
|
ctx->blob = blob;
|
|
ctx->cluster_num = cluster_num;
|
|
ctx->cluster = cluster;
|
|
ctx->cb_fn = cb_fn;
|
|
ctx->cb_arg = cb_arg;
|
|
|
|
spdk_thread_send_msg(blob->bs->md_thread, _spdk_blob_insert_cluster_msg, ctx);
|
|
}
|
|
|
|
/* START spdk_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);
|
|
}
|
|
|
|
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;
|
|
size_t desc_size;
|
|
|
|
_spdk_blob_verify_md_op(blob);
|
|
|
|
if (blob->md_ro) {
|
|
return -EPERM;
|
|
}
|
|
|
|
desc_size = sizeof(struct spdk_blob_md_descriptor_xattr) + strlen(name) + value_len;
|
|
if (desc_size > SPDK_BS_MAX_DESC_SIZE) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BLOB, "Xattr '%s' of size %ld does not fix into single page %ld\n", name,
|
|
desc_size, SPDK_BS_MAX_DESC_SIZE);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
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 -ENOMEM;
|
|
}
|
|
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;
|
|
|
|
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)
|
|
{
|
|
_spdk_blob_verify_md_op(blob);
|
|
|
|
return _spdk_blob_get_xattr_value(blob, name, value, value_len, false);
|
|
}
|
|
|
|
struct spdk_xattr_names {
|
|
uint32_t count;
|
|
const char *names[0];
|
|
};
|
|
|
|
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));
|
|
}
|
|
|
|
bool
|
|
spdk_blob_is_read_only(struct spdk_blob *blob)
|
|
{
|
|
assert(blob != NULL);
|
|
return (blob->data_ro || blob->md_ro);
|
|
}
|
|
|
|
bool
|
|
spdk_blob_is_snapshot(struct spdk_blob *blob)
|
|
{
|
|
struct spdk_blob_list *snapshot_entry;
|
|
|
|
assert(blob != NULL);
|
|
|
|
snapshot_entry = _spdk_bs_get_snapshot_entry(blob->bs, blob->id);
|
|
if (snapshot_entry == NULL) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
spdk_blob_is_clone(struct spdk_blob *blob)
|
|
{
|
|
assert(blob != NULL);
|
|
|
|
if (blob->parent_id != SPDK_BLOBID_INVALID) {
|
|
assert(spdk_blob_is_thin_provisioned(blob));
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
spdk_blob_is_thin_provisioned(struct spdk_blob *blob)
|
|
{
|
|
assert(blob != NULL);
|
|
return !!(blob->invalid_flags & SPDK_BLOB_THIN_PROV);
|
|
}
|
|
|
|
spdk_blob_id
|
|
spdk_blob_get_parent_snapshot(struct spdk_blob_store *bs, spdk_blob_id blob_id)
|
|
{
|
|
struct spdk_blob_list *snapshot_entry = NULL;
|
|
struct spdk_blob_list *clone_entry = NULL;
|
|
|
|
TAILQ_FOREACH(snapshot_entry, &bs->snapshots, link) {
|
|
TAILQ_FOREACH(clone_entry, &snapshot_entry->clones, link) {
|
|
if (clone_entry->id == blob_id) {
|
|
return snapshot_entry->id;
|
|
}
|
|
}
|
|
}
|
|
|
|
return SPDK_BLOBID_INVALID;
|
|
}
|
|
|
|
int
|
|
spdk_blob_get_clones(struct spdk_blob_store *bs, spdk_blob_id blobid, spdk_blob_id *ids,
|
|
size_t *count)
|
|
{
|
|
struct spdk_blob_list *snapshot_entry, *clone_entry;
|
|
size_t n;
|
|
|
|
snapshot_entry = _spdk_bs_get_snapshot_entry(bs, blobid);
|
|
if (snapshot_entry == NULL) {
|
|
*count = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (ids == NULL || *count < snapshot_entry->clone_count) {
|
|
*count = snapshot_entry->clone_count;
|
|
return -ENOMEM;
|
|
}
|
|
*count = snapshot_entry->clone_count;
|
|
|
|
n = 0;
|
|
TAILQ_FOREACH(clone_entry, &snapshot_entry->clones, link) {
|
|
ids[n++] = clone_entry->id;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
SPDK_LOG_REGISTER_COMPONENT("blob", SPDK_LOG_BLOB)
|