diff options
Diffstat (limited to 'database/engine/journalfile.c')
| -rw-r--r-- | database/engine/journalfile.c | 462 |
1 files changed, 462 insertions, 0 deletions
diff --git a/database/engine/journalfile.c b/database/engine/journalfile.c new file mode 100644 index 00000000..44d8461d --- /dev/null +++ b/database/engine/journalfile.c @@ -0,0 +1,462 @@ +// SPDX-License-Identifier: GPL-3.0-or-later +#include "rrdengine.h" + +static void flush_transaction_buffer_cb(uv_fs_t* req) +{ + struct generic_io_descriptor *io_descr; + + debug(D_RRDENGINE, "%s: Journal block was written to disk.", __func__); + if (req->result < 0) { + fatal("%s: uv_fs_write: %s", __func__, uv_strerror((int)req->result)); + } + io_descr = req->data; + + uv_fs_req_cleanup(req); + free(io_descr->buf); + free(io_descr); +} + +/* Careful to always call this before creating a new journal file */ +void wal_flush_transaction_buffer(struct rrdengine_worker_config* wc) +{ + struct rrdengine_instance *ctx = wc->ctx; + int ret; + struct generic_io_descriptor *io_descr; + unsigned pos, size; + struct rrdengine_journalfile *journalfile; + + if (unlikely(NULL == ctx->commit_log.buf || 0 == ctx->commit_log.buf_pos)) { + return; + } + /* care with outstanding transactions when switching journal files */ + journalfile = ctx->datafiles.last->journalfile; + + io_descr = mallocz(sizeof(*io_descr)); + pos = ctx->commit_log.buf_pos; + size = ctx->commit_log.buf_size; + if (pos < size) { + /* simulate an empty transaction to skip the rest of the block */ + *(uint8_t *) (ctx->commit_log.buf + pos) = STORE_PADDING; + } + io_descr->buf = ctx->commit_log.buf; + io_descr->bytes = size; + io_descr->pos = journalfile->pos; + io_descr->req.data = io_descr; + io_descr->completion = NULL; + + io_descr->iov = uv_buf_init((void *)io_descr->buf, size); + ret = uv_fs_write(wc->loop, &io_descr->req, journalfile->file, &io_descr->iov, 1, + journalfile->pos, flush_transaction_buffer_cb); + assert (-1 != ret); + journalfile->pos += RRDENG_BLOCK_SIZE; + ctx->disk_space += RRDENG_BLOCK_SIZE; + ctx->commit_log.buf = NULL; + ctx->stats.io_write_bytes += RRDENG_BLOCK_SIZE; + ++ctx->stats.io_write_requests; +} + +void * wal_get_transaction_buffer(struct rrdengine_worker_config* wc, unsigned size) +{ + struct rrdengine_instance *ctx = wc->ctx; + int ret; + unsigned buf_pos, buf_size; + + assert(size); + if (ctx->commit_log.buf) { + unsigned remaining; + + buf_pos = ctx->commit_log.buf_pos; + buf_size = ctx->commit_log.buf_size; + remaining = buf_size - buf_pos; + if (size > remaining) { + /* we need a new buffer */ + wal_flush_transaction_buffer(wc); + } + } + if (NULL == ctx->commit_log.buf) { + buf_size = ALIGN_BYTES_CEILING(size); + ret = posix_memalign((void *)&ctx->commit_log.buf, RRDFILE_ALIGNMENT, buf_size); + if (unlikely(ret)) { + fatal("posix_memalign:%s", strerror(ret)); + } + buf_pos = ctx->commit_log.buf_pos = 0; + ctx->commit_log.buf_size = buf_size; + } + ctx->commit_log.buf_pos += size; + + return ctx->commit_log.buf + buf_pos; +} + +static void generate_journalfilepath(struct rrdengine_datafile *datafile, char *str, size_t maxlen) +{ + (void) snprintf(str, maxlen, "%s/" WALFILE_PREFIX RRDENG_FILE_NUMBER_PRINT_TMPL WALFILE_EXTENSION, + datafile->ctx->dbfiles_path, datafile->tier, datafile->fileno); +} + +void journalfile_init(struct rrdengine_journalfile *journalfile, struct rrdengine_datafile *datafile) +{ + journalfile->file = (uv_file)0; + journalfile->pos = 0; + journalfile->datafile = datafile; +} + +int destroy_journal_file(struct rrdengine_journalfile *journalfile, struct rrdengine_datafile *datafile) +{ + struct rrdengine_instance *ctx = datafile->ctx; + uv_fs_t req; + int ret, fd; + char path[1024]; + + ret = uv_fs_ftruncate(NULL, &req, journalfile->file, 0, NULL); + if (ret < 0) { + fatal("uv_fs_ftruncate: %s", uv_strerror(ret)); + } + assert(0 == req.result); + uv_fs_req_cleanup(&req); + + ret = uv_fs_close(NULL, &req, journalfile->file, NULL); + if (ret < 0) { + fatal("uv_fs_close: %s", uv_strerror(ret)); + exit(ret); + } + assert(0 == req.result); + uv_fs_req_cleanup(&req); + + generate_journalfilepath(datafile, path, sizeof(path)); + fd = uv_fs_unlink(NULL, &req, path, NULL); + if (fd < 0) { + fatal("uv_fs_fsunlink: %s", uv_strerror(fd)); + } + assert(0 == req.result); + uv_fs_req_cleanup(&req); + + ++ctx->stats.journalfile_deletions; + + return 0; +} + +int create_journal_file(struct rrdengine_journalfile *journalfile, struct rrdengine_datafile *datafile) +{ + struct rrdengine_instance *ctx = datafile->ctx; + uv_fs_t req; + uv_file file; + int ret, fd; + struct rrdeng_jf_sb *superblock; + uv_buf_t iov; + char path[1024]; + + generate_journalfilepath(datafile, path, sizeof(path)); + fd = uv_fs_open(NULL, &req, path, O_DIRECT | O_CREAT | O_RDWR | O_TRUNC, + S_IRUSR | S_IWUSR, NULL); + if (fd < 0) { + fatal("uv_fs_fsopen: %s", uv_strerror(fd)); + } + assert(req.result >= 0); + file = req.result; + uv_fs_req_cleanup(&req); +#ifdef __APPLE__ + info("Disabling OS X caching for file \"%s\".", path); + fcntl(fd, F_NOCACHE, 1); +#endif + + ret = posix_memalign((void *)&superblock, RRDFILE_ALIGNMENT, sizeof(*superblock)); + if (unlikely(ret)) { + fatal("posix_memalign:%s", strerror(ret)); + } + (void) strncpy(superblock->magic_number, RRDENG_JF_MAGIC, RRDENG_MAGIC_SZ); + (void) strncpy(superblock->version, RRDENG_JF_VER, RRDENG_VER_SZ); + + iov = uv_buf_init((void *)superblock, sizeof(*superblock)); + + ret = uv_fs_write(NULL, &req, file, &iov, 1, 0, NULL); + if (ret < 0) { + fatal("uv_fs_write: %s", uv_strerror(ret)); + } + if (req.result < 0) { + fatal("uv_fs_write: %s", uv_strerror((int)req.result)); + } + uv_fs_req_cleanup(&req); + free(superblock); + + journalfile->file = file; + journalfile->pos = sizeof(*superblock); + ctx->stats.io_write_bytes += sizeof(*superblock); + ++ctx->stats.io_write_requests; + ++ctx->stats.journalfile_creations; + + return 0; +} + +static int check_journal_file_superblock(uv_file file) +{ + int ret; + struct rrdeng_jf_sb *superblock; + uv_buf_t iov; + uv_fs_t req; + + ret = posix_memalign((void *)&superblock, RRDFILE_ALIGNMENT, sizeof(*superblock)); + if (unlikely(ret)) { + fatal("posix_memalign:%s", strerror(ret)); + } + iov = uv_buf_init((void *)superblock, sizeof(*superblock)); + + ret = uv_fs_read(NULL, &req, file, &iov, 1, 0, NULL); + if (ret < 0) { + error("uv_fs_read: %s", uv_strerror(ret)); + uv_fs_req_cleanup(&req); + goto error; + } + assert(req.result >= 0); + uv_fs_req_cleanup(&req); + + if (strncmp(superblock->magic_number, RRDENG_JF_MAGIC, RRDENG_MAGIC_SZ) || + strncmp(superblock->version, RRDENG_JF_VER, RRDENG_VER_SZ)) { + error("File has invalid superblock."); + ret = UV_EINVAL; + } else { + ret = 0; + } + error: + free(superblock); + return ret; +} + +static void restore_extent_metadata(struct rrdengine_instance *ctx, struct rrdengine_journalfile *journalfile, + void *buf, unsigned max_size) +{ + struct page_cache *pg_cache = &ctx->pg_cache; + unsigned i, count, payload_length, descr_size, valid_pages; + struct rrdeng_page_cache_descr *descr; + struct extent_info *extent; + /* persistent structures */ + struct rrdeng_jf_store_data *jf_metric_data; + + jf_metric_data = buf; + count = jf_metric_data->number_of_pages; + descr_size = sizeof(*jf_metric_data->descr) * count; + payload_length = sizeof(*jf_metric_data) + descr_size; + if (payload_length > max_size) { + error("Corrupted transaction payload."); + return; + } + + extent = mallocz(sizeof(*extent) + count * sizeof(extent->pages[0])); + extent->offset = jf_metric_data->extent_offset; + extent->size = jf_metric_data->extent_size; + extent->number_of_pages = count; + extent->datafile = journalfile->datafile; + extent->next = NULL; + + for (i = 0, valid_pages = 0 ; i < count ; ++i) { + uuid_t *temp_id; + Pvoid_t *PValue; + struct pg_cache_page_index *page_index; + + if (PAGE_METRICS != jf_metric_data->descr[i].type) { + error("Unknown page type encountered."); + continue; + } + ++valid_pages; + temp_id = (uuid_t *)jf_metric_data->descr[i].uuid; + + uv_rwlock_rdlock(&pg_cache->metrics_index.lock); + PValue = JudyHSGet(pg_cache->metrics_index.JudyHS_array, temp_id, sizeof(uuid_t)); + if (likely(NULL != PValue)) { + page_index = *PValue; + } + uv_rwlock_rdunlock(&pg_cache->metrics_index.lock); + if (NULL == PValue) { + /* First time we see the UUID */ + uv_rwlock_wrlock(&pg_cache->metrics_index.lock); + PValue = JudyHSIns(&pg_cache->metrics_index.JudyHS_array, temp_id, sizeof(uuid_t), PJE0); + assert(NULL == *PValue); /* TODO: figure out concurrency model */ + *PValue = page_index = create_page_index(temp_id); + uv_rwlock_wrunlock(&pg_cache->metrics_index.lock); + } + + descr = pg_cache_create_descr(); + descr->page_length = jf_metric_data->descr[i].page_length; + descr->start_time = jf_metric_data->descr[i].start_time; + descr->end_time = jf_metric_data->descr[i].end_time; + descr->id = &page_index->id; + descr->extent = extent; + extent->pages[i] = descr; + pg_cache_insert(ctx, page_index, descr); + } + if (likely(valid_pages)) + df_extent_insert(extent); +} + +/* + * Replays transaction by interpreting up to max_size bytes from buf. + * Sets id to the current transaction id or to 0 if unknown. + * Returns size of transaction record or 0 for unknown size. + */ +static unsigned replay_transaction(struct rrdengine_instance *ctx, struct rrdengine_journalfile *journalfile, + void *buf, uint64_t *id, unsigned max_size) +{ + unsigned payload_length, size_bytes; + int ret; + /* persistent structures */ + struct rrdeng_jf_transaction_header *jf_header; + struct rrdeng_jf_transaction_trailer *jf_trailer; + uLong crc; + + *id = 0; + jf_header = buf; + if (STORE_PADDING == jf_header->type) { + debug(D_RRDENGINE, "Skipping padding."); + return 0; + } + if (sizeof(*jf_header) > max_size) { + error("Corrupted transaction record, skipping."); + return 0; + } + *id = jf_header->id; + payload_length = jf_header->payload_length; + size_bytes = sizeof(*jf_header) + payload_length + sizeof(*jf_trailer); + if (size_bytes > max_size) { + error("Corrupted transaction record, skipping."); + return 0; + } + jf_trailer = buf + sizeof(*jf_header) + payload_length; + crc = crc32(0L, Z_NULL, 0); + crc = crc32(crc, buf, sizeof(*jf_header) + payload_length); + ret = crc32cmp(jf_trailer->checksum, crc); + debug(D_RRDENGINE, "Transaction %"PRIu64" was read from disk. CRC32 check: %s", *id, ret ? "FAILED" : "SUCCEEDED"); + if (unlikely(ret)) { + return size_bytes; + } + switch (jf_header->type) { + case STORE_DATA: + debug(D_RRDENGINE, "Replaying transaction %"PRIu64"", jf_header->id); + restore_extent_metadata(ctx, journalfile, buf + sizeof(*jf_header), payload_length); + break; + default: + error("Unknown transaction type. Skipping record."); + break; + } + + return size_bytes; +} + + +#define READAHEAD_BYTES (RRDENG_BLOCK_SIZE * 256) +/* + * Iterates journal file transactions and populates the page cache. + * Page cache must already be initialized. + * Returns the maximum transaction id it discovered. + */ +static uint64_t iterate_transactions(struct rrdengine_instance *ctx, struct rrdengine_journalfile *journalfile) +{ + uv_file file; + uint64_t file_size;//, data_file_size; + int ret; + uint64_t pos, pos_i, max_id, id; + unsigned size_bytes; + void *buf; + uv_buf_t iov; + uv_fs_t req; + + file = journalfile->file; + file_size = journalfile->pos; + //data_file_size = journalfile->datafile->pos; TODO: utilize this? + + max_id = 1; + ret = posix_memalign((void *)&buf, RRDFILE_ALIGNMENT, READAHEAD_BYTES); + if (unlikely(ret)) { + fatal("posix_memalign:%s", strerror(ret)); + } + + for (pos = sizeof(struct rrdeng_jf_sb) ; pos < file_size ; pos += READAHEAD_BYTES) { + size_bytes = MIN(READAHEAD_BYTES, file_size - pos); + iov = uv_buf_init(buf, size_bytes); + ret = uv_fs_read(NULL, &req, file, &iov, 1, pos, NULL); + if (ret < 0) { + fatal("uv_fs_read: %s", uv_strerror(ret)); + /*uv_fs_req_cleanup(&req);*/ + } + assert(req.result >= 0); + uv_fs_req_cleanup(&req); + ctx->stats.io_read_bytes += size_bytes; + ++ctx->stats.io_read_requests; + + //pos_i = pos; + //while (pos_i < pos + size_bytes) { + for (pos_i = 0 ; pos_i < size_bytes ; ) { + unsigned max_size; + + max_size = pos + size_bytes - pos_i; + ret = replay_transaction(ctx, journalfile, buf + pos_i, &id, max_size); + if (!ret) /* TODO: support transactions bigger than 4K */ + /* unknown transaction size, move on to the next block */ + pos_i = ALIGN_BYTES_FLOOR(pos_i + RRDENG_BLOCK_SIZE); + else + pos_i += ret; + max_id = MAX(max_id, id); + } + } + + free(buf); + return max_id; +} + +int load_journal_file(struct rrdengine_instance *ctx, struct rrdengine_journalfile *journalfile, + struct rrdengine_datafile *datafile) +{ + uv_fs_t req; + uv_file file; + int ret, fd; + uint64_t file_size, max_id; + char path[1024]; + + generate_journalfilepath(datafile, path, sizeof(path)); + fd = uv_fs_open(NULL, &req, path, O_DIRECT | O_RDWR, S_IRUSR | S_IWUSR, NULL); + if (fd < 0) { + /* if (UV_ENOENT != fd) */ + error("uv_fs_fsopen: %s", uv_strerror(fd)); + uv_fs_req_cleanup(&req); + return fd; + } + assert(req.result >= 0); + file = req.result; + uv_fs_req_cleanup(&req); +#ifdef __APPLE__ + info("Disabling OS X caching for file \"%s\".", path); + fcntl(fd, F_NOCACHE, 1); +#endif + info("Loading journal file \"%s\".", path); + + ret = check_file_properties(file, &file_size, sizeof(struct rrdeng_df_sb)); + if (ret) + goto error; + file_size = ALIGN_BYTES_FLOOR(file_size); + + ret = check_journal_file_superblock(file); + if (ret) + goto error; + ctx->stats.io_read_bytes += sizeof(struct rrdeng_jf_sb); + ++ctx->stats.io_read_requests; + + journalfile->file = file; + journalfile->pos = file_size; + + max_id = iterate_transactions(ctx, journalfile); + + ctx->commit_log.transaction_id = MAX(ctx->commit_log.transaction_id, max_id + 1); + + info("Journal file \"%s\" loaded (size:%"PRIu64").", path, file_size); + return 0; + + error: + (void) uv_fs_close(NULL, &req, file, NULL); + uv_fs_req_cleanup(&req); + return ret; +} + +void init_commit_log(struct rrdengine_instance *ctx) +{ + ctx->commit_log.buf = NULL; + ctx->commit_log.buf_pos = 0; + ctx->commit_log.transaction_id = 1; +}
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