diff options
Diffstat (limited to 'logsmanagement/db_api.c')
| -rw-r--r-- | logsmanagement/db_api.c | 1396 |
1 files changed, 1396 insertions, 0 deletions
diff --git a/logsmanagement/db_api.c b/logsmanagement/db_api.c new file mode 100644 index 00000000..ae091443 --- /dev/null +++ b/logsmanagement/db_api.c @@ -0,0 +1,1396 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + + +/** @file db_api.c + * @brief This is the file implementing the API to the + * logs management database. + */ + +#include "daemon/common.h" +#include "db_api.h" +#include <inttypes.h> +#include <stdio.h> +#include "circular_buffer.h" +#include "helper.h" +#include "lz4.h" +#include "parser.h" + +#define MAIN_DB "main.db" /**< Primary DB with metadata for all the logs managemt collections **/ +#define MAIN_COLLECTIONS_TABLE "LogCollections" /*< Table name where logs collections metadata is stored in MAIN_DB **/ +#define BLOB_STORE_FILENAME "logs.bin." /*< Filename of BLOBs where logs are stored in **/ +#define METADATA_DB_FILENAME "metadata.db" /**< Metadata DB for each log collection **/ +#define LOGS_TABLE "Logs" /*< Table name where logs metadata is stored in METADATA_DB_FILENAME **/ +#define BLOBS_TABLE "Blobs" /*< Table name where BLOBs metadata is stored in METADATA_DB_FILENAME **/ + +#define LOGS_MANAG_DB_VERSION 1 + +static sqlite3 *main_db = NULL; /**< SQLite DB handler for MAIN_DB **/ +static char *main_db_dir = NULL; /**< Directory where all the log management databases and log blobs are stored in **/ +static char *main_db_path = NULL; /**< Path of MAIN_DB **/ + +/* -------------------------------------------------------------------------- */ +/* Database migrations */ +/* -------------------------------------------------------------------------- */ + +/** + * @brief No-op database migration, just to bump up starting version. + * @param database Unused + * @param name Unused + * @return Always 0. + */ +static int do_migration_noop(sqlite3 *database, const char *name){ + UNUSED(database); + UNUSED(name); + collector_info("Running database migration %s", name); + return 0; +} + +typedef struct database_func_migration_list{ + char *name; + int (*func)(sqlite3 *database, const char *name); +} DATABASE_FUNC_MIGRATION_LIST; + +DATABASE_FUNC_MIGRATION_LIST migration_list_main_db[] = { + {.name = MAIN_DB" v0 to v1", .func = do_migration_noop}, + // the terminator of this array + {.name = NULL, .func = NULL} +}; + +DATABASE_FUNC_MIGRATION_LIST migration_list_metadata_db[] = { + {.name = METADATA_DB_FILENAME " v0 to v1", .func = do_migration_noop}, + // the terminator of this array + {.name = NULL, .func = NULL} +}; + +typedef enum { + ERR_TYPE_OTHER, + ERR_TYPE_SQLITE, + ERR_TYPE_LIBUV, +} logs_manag_db_error_t; + +/** + * @brief Logs a database error + * @param[in] log_source Log source that caused the error + * @param[in] error_type Type of error + * @param[in] rc Error code + * @param[in] line Line number where the error occurred (__LINE__) + * @param[in] file Source file where the error occurred (__FILE__) + * @param[in] func Function where the error occurred (__FUNCTION__) + */ +static void throw_error(const char *const log_source, + const logs_manag_db_error_t error_type, + const int rc, const int line, + const char *const file, const char *const func){ + collector_error("[%s]: %s database error: (%d) %s (%s:%s:%d))", + log_source ? log_source : "-", + error_type == ERR_TYPE_OTHER ? "" : ERR_TYPE_SQLITE ? "SQLite" : "libuv", + rc, error_type == ERR_TYPE_OTHER ? "" : ERR_TYPE_SQLITE ? sqlite3_errstr(rc) : uv_strerror(rc), + file, func, line); +} + +/** + * @brief Get or set user_version of database. + * @param db SQLite database to act upon. + * @param set_user_version If <= 0, just get user_version. Otherwise, set + * user_version first, before returning it. + * @return Database user_version or -1 in case of error. + */ +int db_user_version(sqlite3 *const db, const int set_user_version){ + if(unlikely(!db)) return -1; + int rc = 0; + if(set_user_version <= 0){ + sqlite3_stmt *stmt_get_user_version; + rc = sqlite3_prepare_v2(db, "PRAGMA user_version;", -1, &stmt_get_user_version, NULL); + if (unlikely(SQLITE_OK != rc)) { + throw_error(NULL, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return -1; + } + rc = sqlite3_step(stmt_get_user_version); + if (unlikely(SQLITE_ROW != rc)) { + throw_error(NULL, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return -1; + } + int current_user_version = sqlite3_column_int(stmt_get_user_version, 0); + rc = sqlite3_finalize(stmt_get_user_version); + if (unlikely(SQLITE_OK != rc)) { + throw_error(NULL, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return -1; + } + return current_user_version; + } else { + char buf[25]; + snprintfz(buf, 25, "PRAGMA user_version=%d;", set_user_version); + rc = sqlite3_exec(db, buf, NULL, NULL, NULL); + if (unlikely(SQLITE_OK!= rc)) { + throw_error(NULL, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return -1; + } + return set_user_version; + } +} + +static void db_writer_db_mode_none(void *arg){ + struct File_info *const p_file_info = (struct File_info *) arg; + Circ_buff_item_t *item; + + while(__atomic_load_n(&p_file_info->state, __ATOMIC_RELAXED) == LOG_SRC_READY){ + uv_rwlock_rdlock(&p_file_info->circ_buff->buff_realloc_rwlock); + do{ item = circ_buff_read_item(p_file_info->circ_buff);} while(item); + circ_buff_read_done(p_file_info->circ_buff); + uv_rwlock_rdunlock(&p_file_info->circ_buff->buff_realloc_rwlock); + for(int i = 0; i < p_file_info->buff_flush_to_db_interval * 4; i++){ + if(__atomic_load_n(&p_file_info->state, __ATOMIC_RELAXED) != LOG_SRC_READY) + break; + sleep_usec(250 * USEC_PER_MS); + } + } +} + +#define return_db_writer_db_mode_none(p_file_info, do_mut_unlock){ \ + p_file_info->db_mode = LOGS_MANAG_DB_MODE_NONE; \ + freez((void *) p_file_info->db_dir); \ + p_file_info->db_dir = strdupz(""); \ + freez((void *) p_file_info->db_metadata); \ + p_file_info->db_metadata = NULL; \ + sqlite3_finalize(stmt_logs_insert); \ + sqlite3_finalize(stmt_blobs_get_total_filesize); \ + sqlite3_finalize(stmt_blobs_update); \ + sqlite3_finalize(stmt_blobs_set_zero_filesize); \ + sqlite3_finalize(stmt_logs_delete); \ + if(do_mut_unlock){ \ + uv_mutex_unlock(p_file_info->db_mut); \ + uv_rwlock_rdunlock(&p_file_info->circ_buff->buff_realloc_rwlock); \ + } \ + if(__atomic_load_n(&p_file_info->state, __ATOMIC_RELAXED) == LOG_SRC_READY) \ + return fatal_assert(!uv_thread_create( p_file_info->db_writer_thread, \ + db_writer_db_mode_none, \ + p_file_info)); \ +} + +static void db_writer_db_mode_full(void *arg){ + int rc = 0; + struct File_info *const p_file_info = (struct File_info *) arg; + + sqlite3_stmt *stmt_logs_insert = NULL; + sqlite3_stmt *stmt_blobs_get_total_filesize = NULL; + sqlite3_stmt *stmt_blobs_update = NULL; + sqlite3_stmt *stmt_blobs_set_zero_filesize = NULL; + sqlite3_stmt *stmt_logs_delete = NULL; + + /* Prepare LOGS_TABLE INSERT statement */ + rc = sqlite3_prepare_v2(p_file_info->db, + "INSERT INTO " LOGS_TABLE "(" + "FK_BLOB_Id," + "BLOB_Offset," + "Timestamp," + "Msg_compr_size," + "Msg_decompr_size," + "Num_lines" + ") VALUES (?,?,?,?,?,?) ;", + -1, &stmt_logs_insert, NULL); + if (unlikely(SQLITE_OK != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 0); + } + + /* Prepare BLOBS_TABLE get total filesize statement */ + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT SUM(Filesize) FROM " BLOBS_TABLE " ;", + -1, &stmt_blobs_get_total_filesize, NULL); + if (unlikely(SQLITE_OK != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 0); + } + + /* Prepare BLOBS_TABLE UPDATE statement */ + rc = sqlite3_prepare_v2(p_file_info->db, + "UPDATE " BLOBS_TABLE + " SET Filesize = Filesize + ?" + " WHERE Id = ? ;", + -1, &stmt_blobs_update, NULL); + if (unlikely(SQLITE_OK != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 0); + } + + /* Prepare BLOBS_TABLE UPDATE SET zero filesize statement */ + rc = sqlite3_prepare_v2(p_file_info->db, + "UPDATE " BLOBS_TABLE + " SET Filesize = 0" + " WHERE Id = ? ;", + -1, &stmt_blobs_set_zero_filesize, NULL); + if (unlikely(SQLITE_OK != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 0); + } + + /* Prepare LOGS_TABLE DELETE statement */ + rc = sqlite3_prepare_v2(p_file_info->db, + "DELETE FROM " LOGS_TABLE + " WHERE FK_BLOB_Id = ? ;", + -1, &stmt_logs_delete, NULL); + if (unlikely(SQLITE_OK != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 0); + } + + /* Get initial filesize of logs.bin.0 BLOB */ + sqlite3_stmt *stmt_retrieve_filesize_from_id = NULL; + if(unlikely( + SQLITE_OK != (rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT Filesize FROM " BLOBS_TABLE + " WHERE Id = ? ;", + -1, &stmt_retrieve_filesize_from_id, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_retrieve_filesize_from_id, 1, + p_file_info->blob_write_handle_offset)) || + SQLITE_ROW != (rc = sqlite3_step(stmt_retrieve_filesize_from_id)) + )){ + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 0); + } + int64_t blob_filesize = (int64_t) sqlite3_column_int64(stmt_retrieve_filesize_from_id, 0); + rc = sqlite3_finalize(stmt_retrieve_filesize_from_id); + if (unlikely(SQLITE_OK != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 0); + } + + struct timespec ts_db_write_start, ts_db_write_end, ts_db_rotate_end; + while(__atomic_load_n(&p_file_info->state, __ATOMIC_RELAXED) == LOG_SRC_READY){ + clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts_db_write_start); + + uv_rwlock_rdlock(&p_file_info->circ_buff->buff_realloc_rwlock); + uv_mutex_lock(p_file_info->db_mut); + + /* --------------------------------------------------------------------- + * Read items from circular buffer and store them in disk BLOBs. + * After that, SQLite metadata is updated. + * ------------------------------------------------------------------ */ + Circ_buff_item_t *item = circ_buff_read_item(p_file_info->circ_buff); + while (item) { + m_assert(TEST_MS_TIMESTAMP_VALID(item->timestamp), "item->timestamp == 0"); + m_assert(item->text_compressed_size != 0, "item->text_compressed_size == 0"); + m_assert(item->text_size != 0, "item->text_size == 0"); + + /* Write logs in BLOB */ + uv_fs_t write_req; + uv_buf_t uv_buf = uv_buf_init((char *) item->text_compressed, (unsigned int) item->text_compressed_size); + rc = uv_fs_write( NULL, &write_req, + p_file_info->blob_handles[p_file_info->blob_write_handle_offset], + &uv_buf, 1, blob_filesize, NULL); // Write synchronously at the end of the BLOB file + uv_fs_req_cleanup(&write_req); + if(unlikely(rc < 0)){ + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + circ_buff_read_done(p_file_info->circ_buff); + return_db_writer_db_mode_none(p_file_info, 1); + } + + /* Ensure data is flushed to BLOB via fdatasync() */ + uv_fs_t dsync_req; + rc = uv_fs_fdatasync( NULL, &dsync_req, + p_file_info->blob_handles[p_file_info->blob_write_handle_offset], NULL); + uv_fs_req_cleanup(&dsync_req); + if (unlikely(rc)){ + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + circ_buff_read_done(p_file_info->circ_buff); + return_db_writer_db_mode_none(p_file_info, 1); + } + + if(unlikely( + /* Write metadata of logs in LOGS_TABLE */ + SQLITE_OK != (rc = sqlite3_exec(p_file_info->db, "BEGIN TRANSACTION;", NULL, NULL, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_logs_insert, 1, p_file_info->blob_write_handle_offset)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_logs_insert, 2, (sqlite3_int64) blob_filesize)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_logs_insert, 3, (sqlite3_int64) item->timestamp)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_logs_insert, 4, (sqlite3_int64) item->text_compressed_size)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_logs_insert, 5, (sqlite3_int64)item->text_size)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_logs_insert, 6, (sqlite3_int64)item->num_lines)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_logs_insert)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_logs_insert)) || + + /* Update metadata of BLOBs filesize in BLOBS_TABLE */ + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_blobs_update, 1, (sqlite3_int64)item->text_compressed_size)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_blobs_update, 2, p_file_info->blob_write_handle_offset)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_blobs_update)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_blobs_update)) || + SQLITE_OK != (rc = sqlite3_exec(p_file_info->db, "END TRANSACTION;", NULL, NULL, NULL)) + )) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + rc = sqlite3_exec(p_file_info->db, "ROLLBACK;", NULL, NULL, NULL); + if (unlikely(SQLITE_OK != rc)) + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + circ_buff_read_done(p_file_info->circ_buff); + return_db_writer_db_mode_none(p_file_info, 1); + } + + /* TODO: Should we log it if there is a fatal error in the transaction, + * as there will be a mismatch between BLOBs and SQLite metadata? */ + + /* Increase BLOB offset and read next log message until no more messages in buff */ + blob_filesize += (int64_t) item->text_compressed_size; + item = circ_buff_read_item(p_file_info->circ_buff); + } + circ_buff_read_done(p_file_info->circ_buff); + + clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts_db_write_end); + + /* --------------------------------------------------------------------- + * If the filesize of the current write-to BLOB is > + * p_file_info->blob_max_size, then perform a BLOBs rotation. + * ------------------------------------------------------------------ */ + if(blob_filesize > p_file_info->blob_max_size){ + uv_fs_t rename_req; + char old_path[FILENAME_MAX + 1], new_path[FILENAME_MAX + 1]; + + /* Rotate path of BLOBs */ + for(int i = BLOB_MAX_FILES - 1; i >= 0; i--){ + snprintfz(old_path, FILENAME_MAX, "%s" BLOB_STORE_FILENAME "%d", p_file_info->db_dir, i); + snprintfz(new_path, FILENAME_MAX, "%s" BLOB_STORE_FILENAME "%d", p_file_info->db_dir, i + 1); + rc = uv_fs_rename(NULL, &rename_req, old_path, new_path, NULL); + uv_fs_req_cleanup(&rename_req); + if (unlikely(rc)){ + //TODO: This error case needs better handling, as it will result in mismatch with sqlite metadata. + // We probably require a WAL or something similar. + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 1); + } + } + + /* Replace the maximum number with 0 in BLOB files. */ + snprintfz(old_path, FILENAME_MAX, "%s" BLOB_STORE_FILENAME "%d", p_file_info->db_dir, BLOB_MAX_FILES); + snprintfz(new_path, FILENAME_MAX, "%s" BLOB_STORE_FILENAME "%d", p_file_info->db_dir, 0); + rc = uv_fs_rename(NULL, &rename_req, old_path, new_path, NULL); + uv_fs_req_cleanup(&rename_req); + if (unlikely(rc)){ + //TODO: This error case needs better handling, as it will result in mismatch with sqlite metadata. + // We probably require a WAL or something similar. + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 1); + } + + /* Rotate BLOBS_TABLE Filenames */ + rc = sqlite3_exec(p_file_info->db, + "UPDATE " BLOBS_TABLE + " SET Filename = REPLACE( " + " Filename, " + " substr(Filename, -1), " + " case when " + " (cast(substr(Filename, -1) AS INTEGER) < (" LOGS_MANAG_STR(BLOB_MAX_FILES) " - 1)) then " + " substr(Filename, -1) + 1 else 0 end);", + NULL, NULL, NULL); + if (unlikely(rc != SQLITE_OK)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + //TODO: Undo rotation if possible? + return_db_writer_db_mode_none(p_file_info, 1); + } + + /* ----------------------------------------------------------------- + * (a) Update blob_write_handle_offset, + * (b) truncate new write-to BLOB, + * (c) update filesize of truncated BLOB in SQLite DB, + * (d) delete respective logs in LOGS_TABLE for the truncated BLOB and + * (e) reset blob_filesize + * -------------------------------------------------------------- */ + /* (a) */ + p_file_info->blob_write_handle_offset = + p_file_info->blob_write_handle_offset == 1 ? BLOB_MAX_FILES : p_file_info->blob_write_handle_offset - 1; + + /* (b) */ + uv_fs_t trunc_req; + rc = uv_fs_ftruncate(NULL, &trunc_req, p_file_info->blob_handles[p_file_info->blob_write_handle_offset], 0, NULL); + uv_fs_req_cleanup(&trunc_req); + if (unlikely(rc)){ + //TODO: This error case needs better handling, as it will result in mismatch with sqlite metadata. + // We probably require a WAL or something similar. + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 1); + } + + /* (c) */ + if(unlikely( + SQLITE_OK != (rc = sqlite3_exec(p_file_info->db, "BEGIN TRANSACTION;", NULL, NULL, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_blobs_set_zero_filesize, 1, p_file_info->blob_write_handle_offset)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_blobs_set_zero_filesize)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_blobs_set_zero_filesize)) || + + /* (d) */ + SQLITE_OK != (rc = sqlite3_bind_int(stmt_logs_delete, 1, p_file_info->blob_write_handle_offset)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_logs_delete)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_logs_delete)) || + SQLITE_OK != (rc = sqlite3_exec(p_file_info->db, "END TRANSACTION;", NULL, NULL, NULL)) + )) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + rc = sqlite3_exec(p_file_info->db, "ROLLBACK;", NULL, NULL, NULL); + if (unlikely(SQLITE_OK != rc)) + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 1); + } + + /* (e) */ + blob_filesize = 0; + + } + + clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts_db_rotate_end); + + /* Update database write & rotate timings for this log source */ + __atomic_store_n(&p_file_info->db_write_duration, + (ts_db_write_end.tv_sec - ts_db_write_start.tv_sec) * NSEC_PER_SEC + + (ts_db_write_end.tv_nsec - ts_db_write_start.tv_nsec), __ATOMIC_RELAXED); + __atomic_store_n(&p_file_info->db_rotate_duration, + (ts_db_rotate_end.tv_sec - ts_db_write_end.tv_sec) * NSEC_PER_SEC + + (ts_db_rotate_end.tv_nsec - ts_db_write_end.tv_nsec), __ATOMIC_RELAXED); + + /* Update total disk usage of all BLOBs for this log source */ + rc = sqlite3_step(stmt_blobs_get_total_filesize); + if (unlikely(SQLITE_ROW != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 1); + } + __atomic_store_n(&p_file_info->blob_total_size, sqlite3_column_int64(stmt_blobs_get_total_filesize, 0), __ATOMIC_RELAXED); + rc = sqlite3_reset(stmt_blobs_get_total_filesize); + if (unlikely(SQLITE_OK != rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + return_db_writer_db_mode_none(p_file_info, 1); + } + + // TODO: Can uv_mutex_unlock(p_file_info->db_mut) be moved before if(blob_filesize > p_file_info-> blob_max_size) ? + uv_mutex_unlock(p_file_info->db_mut); + uv_rwlock_rdunlock(&p_file_info->circ_buff->buff_realloc_rwlock); + for(int i = 0; i < p_file_info->buff_flush_to_db_interval * 4; i++){ + if(__atomic_load_n(&p_file_info->state, __ATOMIC_RELAXED) != LOG_SRC_READY) + break; + sleep_usec(250 * USEC_PER_MS); + } + } + + return_db_writer_db_mode_none(p_file_info, 0); +} + +inline void db_set_main_dir(char *const dir){ + main_db_dir = dir; +} + +int db_init() { + int rc = 0; + char *err_msg = 0; + uv_fs_t mkdir_req; + + if(unlikely(!main_db_dir || !*main_db_dir)){ + rc = -1; + collector_error("main_db_dir is unset"); + throw_error(NULL, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + size_t main_db_path_len = strlen(main_db_dir) + sizeof(MAIN_DB) + 1; + main_db_path = mallocz(main_db_path_len); + snprintfz(main_db_path, main_db_path_len, "%s/" MAIN_DB, main_db_dir); + + /* Create databases directory if it doesn't exist. */ + rc = uv_fs_mkdir(NULL, &mkdir_req, main_db_dir, 0775, NULL); + uv_fs_req_cleanup(&mkdir_req); + if(rc == 0) collector_info("DB directory created: %s", main_db_dir); + else if (rc == UV_EEXIST) collector_info("DB directory %s found", main_db_dir); + else { + throw_error(NULL, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + + /* Create or open main db */ + rc = sqlite3_open(main_db_path, &main_db); + if (unlikely(rc != SQLITE_OK)){ + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + + /* Configure main database */ + rc = sqlite3_exec(main_db, + "PRAGMA auto_vacuum = INCREMENTAL;" + "PRAGMA synchronous = 1;" + "PRAGMA journal_mode = WAL;" + "PRAGMA temp_store = MEMORY;" + "PRAGMA foreign_keys = ON;", + 0, 0, &err_msg); + if (unlikely(rc != SQLITE_OK)) { + collector_error("Failed to configure database, SQL error: %s\n", err_msg); + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } else collector_info("%s configured successfully", MAIN_DB); + + /* Execute pending main database migrations */ + int main_db_ver = db_user_version(main_db, -1); + if (likely(LOGS_MANAG_DB_VERSION == main_db_ver)) + collector_info("Logs management %s database version is %d (no migration needed)", MAIN_DB, main_db_ver); + else { + for(int ver = main_db_ver; ver < LOGS_MANAG_DB_VERSION && migration_list_main_db[ver].func; ver++){ + rc = (migration_list_main_db[ver].func)(main_db, migration_list_main_db[ver].name); + if (unlikely(rc)){ + collector_error("Logs management %s database migration from version %d to version %d failed", MAIN_DB, ver, ver + 1); + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + db_user_version(main_db, ver + 1); + } + } + + /* Create new main DB LogCollections table if it doesn't exist */ + rc = sqlite3_exec(main_db, + "CREATE TABLE IF NOT EXISTS " MAIN_COLLECTIONS_TABLE "(" + "Id INTEGER PRIMARY KEY," + "Stream_Tag TEXT NOT NULL," + "Log_Source_Path TEXT NOT NULL," + "Type INTEGER NOT NULL," + "DB_Dir TEXT NOT NULL," + "UNIQUE(Stream_Tag, DB_Dir) " + ");", + 0, 0, &err_msg); + if (unlikely(SQLITE_OK != rc)) { + collector_error("Failed to create table" MAIN_COLLECTIONS_TABLE "SQL error: %s", err_msg); + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + + sqlite3_stmt *stmt_search_if_log_source_exists = NULL; + rc = sqlite3_prepare_v2(main_db, + "SELECT COUNT(*), Id, DB_Dir FROM " MAIN_COLLECTIONS_TABLE + " WHERE Stream_Tag = ? AND Log_Source_Path = ? AND Type = ? ;", + -1, &stmt_search_if_log_source_exists, NULL); + if (unlikely(SQLITE_OK != rc)){ + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + + + sqlite3_stmt *stmt_insert_log_collection_metadata = NULL; + rc = sqlite3_prepare_v2(main_db, + "INSERT INTO " MAIN_COLLECTIONS_TABLE + " (Stream_Tag, Log_Source_Path, Type, DB_Dir) VALUES (?,?,?,?) ;", + -1, &stmt_insert_log_collection_metadata, NULL); + if (unlikely(SQLITE_OK != rc)){ + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + + for (int i = 0; i < p_file_infos_arr->count; i++) { + + struct File_info *const p_file_info = p_file_infos_arr->data[i]; + + if(p_file_info->db_mode == LOGS_MANAG_DB_MODE_NONE){ + p_file_info->db_dir = strdupz(""); + p_file_info->db_writer_thread = mallocz(sizeof(uv_thread_t)); + rc = uv_thread_create(p_file_info->db_writer_thread, db_writer_db_mode_none, p_file_info); + if (unlikely(rc)){ + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + } + else if(p_file_info->db_mode == LOGS_MANAG_DB_MODE_FULL){ + + p_file_info->db_mut = mallocz(sizeof(uv_mutex_t)); + rc = uv_mutex_init(p_file_info->db_mut); + if (unlikely(rc)) fatal("Failed to initialize uv_mutex_t"); + uv_mutex_lock(p_file_info->db_mut); + + // This error check will be used a lot, so define it here. + #define do_sqlite_error_check(p_file_info, rc, rc_expctd) do { \ + if(unlikely(rc_expctd != rc)) { \ + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__);\ + uv_mutex_unlock(p_file_info->db_mut); \ + goto return_error; \ + } \ + } while(0) + + if(unlikely( + SQLITE_OK != (rc = sqlite3_bind_text(stmt_search_if_log_source_exists, 1, p_file_info->stream_guid, -1, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_text(stmt_search_if_log_source_exists, 2, p_file_info->filename, -1, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_search_if_log_source_exists, 3, p_file_info->log_type)) || + /* COUNT(*) query should always return SQLITE_ROW */ + SQLITE_ROW != (rc = sqlite3_step(stmt_search_if_log_source_exists)))){ + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + + const int log_source_occurences = sqlite3_column_int(stmt_search_if_log_source_exists, 0); + switch (log_source_occurences) { + case 0: { /* Log collection metadata not found in main DB - create a new record */ + + /* Create directory of collection of logs for the particular + * log source (in the form of a UUID) and bind it. */ + uuid_t uuid; + uuid_generate(uuid); + char uuid_str[UUID_STR_LEN]; // ex. "1b4e28ba-2fa1-11d2-883f-0016d3cca427" + "\0" + uuid_unparse_lower(uuid, uuid_str); + + p_file_info->db_dir = mallocz(snprintf(NULL, 0, "%s/%s/", main_db_dir, uuid_str) + 1); + sprintf((char *) p_file_info->db_dir, "%s/%s/", main_db_dir, uuid_str); + + rc = uv_fs_mkdir(NULL, &mkdir_req, p_file_info->db_dir, 0775, NULL); + uv_fs_req_cleanup(&mkdir_req); + if (unlikely(rc)) { + if(errno == EEXIST) + collector_error("DB directory %s exists but not found in %s.\n", p_file_info->db_dir, MAIN_DB); + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + + if(unlikely( + SQLITE_OK != (rc = sqlite3_bind_text(stmt_insert_log_collection_metadata, 1, p_file_info->stream_guid, -1, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_text(stmt_insert_log_collection_metadata, 2, p_file_info->filename, -1, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_insert_log_collection_metadata, 3, p_file_info->log_type)) || + SQLITE_OK != (rc = sqlite3_bind_text(stmt_insert_log_collection_metadata, 4, p_file_info->db_dir, -1, NULL)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_insert_log_collection_metadata)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_insert_log_collection_metadata)))) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + + break; + } + + case 1: { /* File metadata found in DB */ + p_file_info->db_dir = mallocz((size_t)sqlite3_column_bytes(stmt_search_if_log_source_exists, 2) + 1); + sprintf((char*) p_file_info->db_dir, "%s", sqlite3_column_text(stmt_search_if_log_source_exists, 2)); + break; + } + + default: { /* Error, file metadata can exist either 0 or 1 times in DB */ + m_assert(0, "Same file stored in DB more than once!"); + collector_error("[%s]: Record encountered multiple times in DB " MAIN_COLLECTIONS_TABLE " table \n", + p_file_info->filename); + throw_error(p_file_info->chartname, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + } + rc = sqlite3_reset(stmt_search_if_log_source_exists); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* Create or open metadata DBs for each log collection */ + p_file_info->db_metadata = mallocz(snprintf(NULL, 0, "%s" METADATA_DB_FILENAME, p_file_info->db_dir) + 1); + sprintf((char *) p_file_info->db_metadata, "%s" METADATA_DB_FILENAME, p_file_info->db_dir); + rc = sqlite3_open(p_file_info->db_metadata, &p_file_info->db); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* Configure metadata DB */ + rc = sqlite3_exec(p_file_info->db, + "PRAGMA auto_vacuum = INCREMENTAL;" + "PRAGMA synchronous = 1;" + "PRAGMA journal_mode = WAL;" + "PRAGMA temp_store = MEMORY;" + "PRAGMA foreign_keys = ON;", + 0, 0, &err_msg); + if (unlikely(rc != SQLITE_OK)) { + collector_error("[%s]: Failed to configure database, SQL error: %s", p_file_info->filename, err_msg); + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + + /* Execute pending metadata database migrations */ + collector_info("[%s]: About to execute " METADATA_DB_FILENAME " migrations", p_file_info->chartname); + int metadata_db_ver = db_user_version(p_file_info->db, -1); + if (likely(LOGS_MANAG_DB_VERSION == metadata_db_ver)) { + collector_info( "[%s]: Logs management " METADATA_DB_FILENAME " database version is %d (no migration needed)", + p_file_info->chartname, metadata_db_ver); + } else { + for(int ver = metadata_db_ver; ver < LOGS_MANAG_DB_VERSION && migration_list_metadata_db[ver].func; ver++){ + rc = (migration_list_metadata_db[ver].func)(p_file_info->db, migration_list_metadata_db[ver].name); + if (unlikely(rc)){ + collector_error("[%s]: Logs management " METADATA_DB_FILENAME " database migration from version %d to version %d failed", + p_file_info->chartname, ver, ver + 1); + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + db_user_version(p_file_info->db, ver + 1); + } + } + + /* ----------------------------------------------------------------- + * Create BLOBS_TABLE and LOGS_TABLE if they don't exist. Do it + * as a transaction, so that it can all be rolled back if something + * goes wrong. + * -------------------------------------------------------------- */ + { + rc = sqlite3_exec(p_file_info->db, "BEGIN TRANSACTION;", NULL, NULL, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* Check if BLOBS_TABLE exists or not */ + sqlite3_stmt *stmt_check_if_BLOBS_TABLE_exists = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT COUNT(*) FROM sqlite_master" + " WHERE type='table' AND name='"BLOBS_TABLE"';", + -1, &stmt_check_if_BLOBS_TABLE_exists, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_step(stmt_check_if_BLOBS_TABLE_exists); + do_sqlite_error_check(p_file_info, rc, SQLITE_ROW); + + /* If BLOBS_TABLE doesn't exist, create and populate it */ + if(sqlite3_column_int(stmt_check_if_BLOBS_TABLE_exists, 0) == 0){ + + /* 1. Create it */ + rc = sqlite3_exec(p_file_info->db, + "CREATE TABLE IF NOT EXISTS " BLOBS_TABLE "(" + "Id INTEGER PRIMARY KEY," + "Filename TEXT NOT NULL," + "Filesize INTEGER NOT NULL" + ");", + 0, 0, &err_msg); + if (unlikely(SQLITE_OK != rc)) { + collector_error("[%s]: Failed to create " BLOBS_TABLE ", SQL error: %s", p_file_info->chartname, err_msg); + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } else collector_info("[%s]: Table " BLOBS_TABLE " created successfully", p_file_info->chartname); + + /* 2. Populate it */ + sqlite3_stmt *stmt_init_BLOBS_table = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "INSERT INTO " BLOBS_TABLE + " (Filename, Filesize) VALUES (?,?) ;", + -1, &stmt_init_BLOBS_table, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + for(int i = 0; i < BLOB_MAX_FILES; i++){ + char filename[FILENAME_MAX + 1]; + snprintfz(filename, FILENAME_MAX, BLOB_STORE_FILENAME "%d", i); + if(unlikely( + SQLITE_OK != (rc = sqlite3_bind_text(stmt_init_BLOBS_table, 1, filename, -1, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_init_BLOBS_table, 2, (sqlite3_int64) 0)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_init_BLOBS_table)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_init_BLOBS_table)))){ + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + } + rc = sqlite3_finalize(stmt_init_BLOBS_table); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + } + rc = sqlite3_finalize(stmt_check_if_BLOBS_TABLE_exists); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* If LOGS_TABLE doesn't exist, create it */ + rc = sqlite3_exec(p_file_info->db, + "CREATE TABLE IF NOT EXISTS " LOGS_TABLE "(" + "Id INTEGER PRIMARY KEY," + "FK_BLOB_Id INTEGER NOT NULL," + "BLOB_Offset INTEGER NOT NULL," + "Timestamp INTEGER NOT NULL," + "Msg_compr_size INTEGER NOT NULL," + "Msg_decompr_size INTEGER NOT NULL," + "Num_lines INTEGER NOT NULL," + "FOREIGN KEY (FK_BLOB_Id) REFERENCES " BLOBS_TABLE " (Id) ON DELETE CASCADE ON UPDATE CASCADE" + ");", + 0, 0, &err_msg); + if (unlikely(SQLITE_OK != rc)) { + collector_error("[%s]: Failed to create " LOGS_TABLE ", SQL error: %s", p_file_info->chartname, err_msg); + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } else collector_info("[%s]: Table " LOGS_TABLE " created successfully", p_file_info->chartname); + + /* Create index on LOGS_TABLE Timestamp + * TODO: If this doesn't speed up queries, check SQLITE R*tree + * module. Requires benchmarking with/without index. */ + rc = sqlite3_exec(p_file_info->db, + "CREATE INDEX IF NOT EXISTS logs_timestamps_idx " + "ON " LOGS_TABLE "(Timestamp);", + 0, 0, &err_msg); + if (unlikely(SQLITE_OK != rc)) { + collector_error("[%s]: Failed to create logs_timestamps_idx, SQL error: %s", p_file_info->chartname, err_msg); + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } else collector_info("[%s]: logs_timestamps_idx created successfully", p_file_info->chartname); + + rc = sqlite3_exec(p_file_info->db, "END TRANSACTION;", NULL, NULL, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + } + + + /* ----------------------------------------------------------------- + * Remove excess BLOBs beyond BLOB_MAX_FILES (from both DB and disk + * storage). + * + * This is useful if BLOB_MAX_FILES is reduced after an agent + * restart (for example, if in the future it is not hardcoded, + * but instead it is read from the configuration file). LOGS_TABLE + * entries should be deleted automatically (due to ON DELETE CASCADE). + * -------------------------------------------------------------- */ + { + sqlite3_stmt *stmt_get_BLOBS_TABLE_size = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT MAX(Id) FROM " BLOBS_TABLE ";", + -1, &stmt_get_BLOBS_TABLE_size, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_step(stmt_get_BLOBS_TABLE_size); + do_sqlite_error_check(p_file_info, rc, SQLITE_ROW); + + const int blobs_table_max_id = sqlite3_column_int(stmt_get_BLOBS_TABLE_size, 0); + + sqlite3_stmt *stmt_retrieve_filename_last_digits = NULL; // This statement retrieves the last digit(s) from the Filename column of BLOBS_TABLE + rc = sqlite3_prepare_v2(p_file_info->db, + "WITH split(word, str) AS ( SELECT '', (SELECT Filename FROM " BLOBS_TABLE " WHERE Id = ? ) || '.' " + "UNION ALL SELECT substr(str, 0, instr(str, '.')), substr(str, instr(str, '.')+1) FROM split WHERE str!='' ) " + "SELECT word FROM split WHERE word!='' ORDER BY LENGTH(str) LIMIT 1;", + -1, &stmt_retrieve_filename_last_digits, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + sqlite3_stmt *stmt_delete_row_by_id = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "DELETE FROM " BLOBS_TABLE " WHERE Id = ?;", + -1, &stmt_delete_row_by_id, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + for (int id = 1; id <= blobs_table_max_id; id++){ + + rc = sqlite3_bind_int(stmt_retrieve_filename_last_digits, 1, id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_step(stmt_retrieve_filename_last_digits); + do_sqlite_error_check(p_file_info, rc, SQLITE_ROW); + int last_digits = sqlite3_column_int(stmt_retrieve_filename_last_digits, 0); + rc = sqlite3_reset(stmt_retrieve_filename_last_digits); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* If last_digits > BLOB_MAX_FILES - 1, then some BLOB files + * will need to be removed (both from DB BLOBS_TABLE and + * also from the disk). */ + if(last_digits > BLOB_MAX_FILES - 1){ + + /* Delete BLOB file from filesystem */ + char blob_delete_path[FILENAME_MAX + 1]; + snprintfz(blob_delete_path, FILENAME_MAX, "%s" BLOB_STORE_FILENAME "%d", p_file_info->db_dir, last_digits); + uv_fs_t unlink_req; + rc = uv_fs_unlink(NULL, &unlink_req, blob_delete_path, NULL); + uv_fs_req_cleanup(&unlink_req); + if (unlikely(rc)) { + // TODO: If there is an erro here, the entry won't be deleted from BLOBS_TABLE. What to do? + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* Delete entry from DB BLOBS_TABLE */ + rc = sqlite3_bind_int(stmt_delete_row_by_id, 1, id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_step(stmt_delete_row_by_id); + do_sqlite_error_check(p_file_info, rc, SQLITE_DONE); + rc = sqlite3_reset(stmt_delete_row_by_id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + } + } + rc = sqlite3_finalize(stmt_retrieve_filename_last_digits); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_finalize(stmt_delete_row_by_id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* ------------------------------------------------------------- + * BLOBS_TABLE ids after the deletion might not be contiguous. + * This needs to be fixed, by having the ids updated. + * LOGS_TABLE FKs will be updated automatically + * (due to ON UPDATE CASCADE). + * ---------------------------------------------------------- */ + + int old_blobs_table_ids[BLOB_MAX_FILES]; + int off = 0; + sqlite3_stmt *stmt_retrieve_all_ids = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT Id FROM " BLOBS_TABLE " ORDER BY Id ASC;", + -1, &stmt_retrieve_all_ids, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + rc = sqlite3_step(stmt_retrieve_all_ids); + while(rc == SQLITE_ROW){ + old_blobs_table_ids[off++] = sqlite3_column_int(stmt_retrieve_all_ids, 0); + rc = sqlite3_step(stmt_retrieve_all_ids); + } + do_sqlite_error_check(p_file_info, rc, SQLITE_DONE); + rc = sqlite3_finalize(stmt_retrieve_all_ids); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + sqlite3_stmt *stmt_update_id = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "UPDATE " BLOBS_TABLE " SET Id = ? WHERE Id = ?;", + -1, &stmt_update_id, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + for (int i = 0; i < BLOB_MAX_FILES; i++){ + if(unlikely( + SQLITE_OK != (rc = sqlite3_bind_int(stmt_update_id, 1, i + 1)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_update_id, 2, old_blobs_table_ids[i])) || + SQLITE_DONE != (rc = sqlite3_step(stmt_update_id)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_update_id)))) { + throw_error(p_file_info->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + } + rc = sqlite3_finalize(stmt_update_id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + } + + /* ----------------------------------------------------------------- + * Traverse BLOBS_TABLE, open logs.bin.X files and store their + * file handles in p_file_info array. + * -------------------------------------------------------------- */ + sqlite3_stmt *stmt_retrieve_metadata_from_id = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT Filename, Filesize FROM " BLOBS_TABLE + " WHERE Id = ? ;", + -1, &stmt_retrieve_metadata_from_id, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + sqlite3_stmt *stmt_retrieve_total_logs_size = NULL; + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT SUM(Msg_compr_size) FROM " LOGS_TABLE + " WHERE FK_BLOB_Id = ? GROUP BY FK_BLOB_Id ;", + -1, &stmt_retrieve_total_logs_size, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + uv_fs_t open_req; + for(int id = 1; id <= BLOB_MAX_FILES; id++){ + + /* Open BLOB file based on filename stored in BLOBS_TABLE. */ + rc = sqlite3_bind_int(stmt_retrieve_metadata_from_id, 1, id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_step(stmt_retrieve_metadata_from_id); + do_sqlite_error_check(p_file_info, rc, SQLITE_ROW); + + char filename[FILENAME_MAX + 1] = {0}; + snprintfz(filename, FILENAME_MAX, "%s%s", p_file_info->db_dir, + sqlite3_column_text(stmt_retrieve_metadata_from_id, 0)); + rc = uv_fs_open(NULL, &open_req, filename, + UV_FS_O_RDWR | UV_FS_O_CREAT | UV_FS_O_APPEND | UV_FS_O_RANDOM, + 0644, NULL); + if (unlikely(rc < 0)){ + uv_fs_req_cleanup(&open_req); + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + + // open_req.result of a uv_fs_t is the file descriptor in case of the uv_fs_open + p_file_info->blob_handles[id] = open_req.result; + uv_fs_req_cleanup(&open_req); + + const int64_t metadata_filesize = (int64_t) sqlite3_column_int64(stmt_retrieve_metadata_from_id, 1); + + /* ------------------------------------------------------------- + * Retrieve total log messages compressed size from LOGS_TABLE + * for current FK_BLOB_Id. + * Only to assert whether correct - not used elsewhere. + * + * If no rows are returned, it means it is probably the initial + * execution of the program so still valid (except if rc is other + * than SQLITE_DONE, which is an error then). + * ---------------------------------------------------------- */ + rc = sqlite3_bind_int(stmt_retrieve_total_logs_size, 1, id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_step(stmt_retrieve_total_logs_size); + if (SQLITE_ROW == rc){ + const int64_t total_logs_filesize = (int64_t) sqlite3_column_int64(stmt_retrieve_total_logs_size, 0); + if(unlikely(total_logs_filesize != metadata_filesize)){ + throw_error(p_file_info->chartname, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + } else do_sqlite_error_check(p_file_info, rc, SQLITE_DONE); + + + /* Get filesize of BLOB file. */ + uv_fs_t stat_req; + rc = uv_fs_stat(NULL, &stat_req, filename, NULL); + if (unlikely(rc)){ + uv_fs_req_cleanup(&stat_req); + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + const int64_t blob_filesize = (int64_t) stat_req.statbuf.st_size; + uv_fs_req_cleanup(&stat_req); + + do{ + /* Case 1: blob_filesize == metadata_filesize (equal, either both zero or not): All good */ + if(likely(blob_filesize == metadata_filesize)) + break; + + /* Case 2: blob_filesize == 0 && metadata_filesize > 0: fatal(), however could it mean that + * EXT_BLOB_STORE_FILENAME was rotated but the SQLite metadata wasn't updated? So can it + * maybe be recovered by un-rotating? Either way, treat as fatal error for now. */ + // TODO: Can we avoid fatal()? + if(unlikely(blob_filesize == 0 && metadata_filesize > 0)){ + collector_error("[%s]: blob_filesize == 0 but metadata_filesize > 0 for '%s'\n", + p_file_info->chartname, filename); + throw_error(p_file_info->chartname, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + + /* Case 3: blob_filesize > metadata_filesize: Truncate binary to sqlite filesize, program + * crashed or terminated after writing BLOBs to external file but before metadata was updated */ + if(unlikely(blob_filesize > metadata_filesize)){ + collector_info("[%s]: blob_filesize > metadata_filesize for '%s'. Will attempt to fix it.", + p_file_info->chartname, filename); + uv_fs_t trunc_req; + rc = uv_fs_ftruncate(NULL, &trunc_req, p_file_info->blob_handles[id], metadata_filesize, NULL); + uv_fs_req_cleanup(&trunc_req); + if(unlikely(rc)) { + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + break; + } + + /* Case 4: blob_filesize < metadata_filesize: unrecoverable, + * maybe rotation went horrible wrong? + * TODO: Delete external BLOB and clear metadata from DB, + * start from clean state but the most recent logs. */ + if(unlikely(blob_filesize < metadata_filesize)){ + collector_info("[%s]: blob_filesize < metadata_filesize for '%s'.", + p_file_info->chartname, filename); + throw_error(p_file_info->chartname, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } + + /* Case 5: default if none of the above, should never reach here, fatal() */ + m_assert(0, "Code should not reach here"); + throw_error(p_file_info->chartname, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + uv_mutex_unlock(p_file_info->db_mut); + goto return_error; + } while(0); + + + /* Initialise blob_write_handle with logs.bin.0 */ + if(filename[strlen(filename) - 1] == '0') + p_file_info->blob_write_handle_offset = id; + + rc = sqlite3_reset(stmt_retrieve_total_logs_size); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + rc = sqlite3_reset(stmt_retrieve_metadata_from_id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + } + + rc = sqlite3_finalize(stmt_retrieve_metadata_from_id); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* Prepare statements to be used in single database queries */ + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT Timestamp, Msg_compr_size , Msg_decompr_size, " + "BLOB_Offset, " BLOBS_TABLE".Id, Num_lines " + "FROM " LOGS_TABLE " INNER JOIN " BLOBS_TABLE " " + "ON " LOGS_TABLE ".FK_BLOB_Id = " BLOBS_TABLE ".Id " + "WHERE Timestamp >= ? AND Timestamp <= ? " + "ORDER BY Timestamp;", + -1, &p_file_info->stmt_get_log_msg_metadata_asc, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + rc = sqlite3_prepare_v2(p_file_info->db, + "SELECT Timestamp, Msg_compr_size , Msg_decompr_size, " + "BLOB_Offset, " BLOBS_TABLE".Id, Num_lines " + "FROM " LOGS_TABLE " INNER JOIN " BLOBS_TABLE " " + "ON " LOGS_TABLE ".FK_BLOB_Id = " BLOBS_TABLE ".Id " + "WHERE Timestamp <= ? AND Timestamp >= ? " + "ORDER BY Timestamp DESC;", + -1, &p_file_info->stmt_get_log_msg_metadata_desc, NULL); + do_sqlite_error_check(p_file_info, rc, SQLITE_OK); + + /* DB initialisation finished; release lock */ + uv_mutex_unlock(p_file_info->db_mut); + + /* Create synchronous writer thread, one for each log source */ + p_file_info->db_writer_thread = mallocz(sizeof(uv_thread_t)); + rc = uv_thread_create(p_file_info->db_writer_thread, db_writer_db_mode_full, p_file_info); + if (unlikely(rc)){ + throw_error(p_file_info->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + goto return_error; + } + } + } + rc = sqlite3_finalize(stmt_search_if_log_source_exists); + if (unlikely(rc != SQLITE_OK)){ + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + // TODO: Some additional cleanup required here, e.g. terminate db_writer_thread. + goto return_error; + } + rc = sqlite3_finalize(stmt_insert_log_collection_metadata); + if (unlikely(rc != SQLITE_OK)){ + throw_error(MAIN_DB, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + // TODO: Some additional cleanup required here, e.g. terminate db_writer_thread. + goto return_error; + } + + return 0; + +return_error: + freez(main_db_path); + main_db_path = NULL; + + sqlite3_close(main_db); // No-op if main_db == NULL + sqlite3_free(err_msg); // No-op if err_msg == NULL + + m_assert(rc != 0, "rc should not be == 0 in case of error"); + return rc == 0 ? -1 : rc; +} + +/** + * @brief Search database(s) for logs + * @details This function searches one or more databases for any results + * matching the query parameters. If any results are found, it will decompress + * the text of each returned row and add it to the results buffer, up to a + * maximum amount of p_query_params->quota bytes (unless timed out). + * @todo Make decompress buffer static to reduce mallocs/frees. + * @todo Limit number of results returned through SQLite Query to speed up search? + */ +void db_search(logs_query_params_t *const p_query_params, struct File_info *const p_file_infos[]) { + int rc = 0; + + sqlite3_stmt *stmt_get_log_msg_metadata; + sqlite3 *dbt = NULL; // Used only when multiple DBs are searched + + if(!p_file_infos[1]){ /* Single DB to be searched */ + stmt_get_log_msg_metadata = p_query_params->order_by_asc ? + p_file_infos[0]->stmt_get_log_msg_metadata_asc : p_file_infos[0]->stmt_get_log_msg_metadata_desc; + if(unlikely( + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_get_log_msg_metadata, 1, p_query_params->req_from_ts)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_get_log_msg_metadata, 2, p_query_params->req_to_ts)) || + (SQLITE_ROW != (rc = sqlite3_step(stmt_get_log_msg_metadata)) && (SQLITE_DONE != rc)) + )){ + throw_error(p_file_infos[0]->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + // TODO: If there are errors here, should db_writer_db_mode_full() be terminated? + sqlite3_reset(stmt_get_log_msg_metadata); + return; + } + } else { /* Multiple DBs to be searched */ + sqlite3_stmt *stmt_attach_db; + sqlite3_stmt *stmt_create_tmp_view; + int pfi_off = 0; + + /* Open a new DB connection on the first log source DB and attach other DBs */ + if(unlikely( + SQLITE_OK != (rc = sqlite3_open_v2(p_file_infos[0]->db_metadata, &dbt, SQLITE_OPEN_READONLY, NULL)) || + SQLITE_OK != (rc = sqlite3_prepare_v2(dbt,"ATTACH DATABASE ? AS ? ;", -1, &stmt_attach_db, NULL)) + )){ + throw_error(p_file_infos[0]->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + sqlite3_close_v2(dbt); + return; + } + for(pfi_off = 0; p_file_infos[pfi_off]; pfi_off++){ + if(unlikely( + SQLITE_OK != (rc = sqlite3_bind_text(stmt_attach_db, 1, p_file_infos[pfi_off]->db_metadata, -1, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int(stmt_attach_db, 2, pfi_off)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_attach_db)) || + SQLITE_OK != (rc = sqlite3_reset(stmt_attach_db)) + )){ + throw_error(p_file_infos[pfi_off]->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + sqlite3_close_v2(dbt); + return; + } + } + + /* Create temporary view, then prepare retrieval of metadata from + * TMP_VIEW_TABLE statement and execute search. + * TODO: Limit number of results returned through SQLite Query to speed up search? */ + #define TMP_VIEW_TABLE "compound_view" + #define TMP_VIEW_QUERY_PREFIX "CREATE TEMP VIEW " TMP_VIEW_TABLE " AS SELECT * FROM (SELECT * FROM '0'."\ + LOGS_TABLE " INNER JOIN (VALUES(0)) ORDER BY Timestamp) " + #define TMP_VIEW_QUERY_BODY_1 "UNION ALL SELECT * FROM (SELECT * FROM '" + #define TMP_VIEW_QUERY_BODY_2 "'." LOGS_TABLE " INNER JOIN (VALUES(" + #define TMP_VIEW_QUERY_BODY_3 ")) ORDER BY Timestamp) " + #define TMP_VIEW_QUERY_POSTFIX "ORDER BY Timestamp;" + + char tmp_view_query[sizeof(TMP_VIEW_QUERY_PREFIX) + ( + sizeof(TMP_VIEW_QUERY_BODY_1) + + sizeof(TMP_VIEW_QUERY_BODY_2) + + sizeof(TMP_VIEW_QUERY_BODY_3) + 4 + ) * (LOGS_MANAG_MAX_COMPOUND_QUERY_SOURCES - 1) + + sizeof(TMP_VIEW_QUERY_POSTFIX) + + 50 /* +50 bytes to play it safe */] = TMP_VIEW_QUERY_PREFIX; + int pos = sizeof(TMP_VIEW_QUERY_PREFIX) - 1; + for(pfi_off = 1; p_file_infos[pfi_off]; pfi_off++){ // Skip p_file_infos[0] + int n = snprintf(&tmp_view_query[pos], sizeof(tmp_view_query) - pos, "%s%d%s%d%s", + TMP_VIEW_QUERY_BODY_1, pfi_off, + TMP_VIEW_QUERY_BODY_2, pfi_off, + TMP_VIEW_QUERY_BODY_3); + + if (n < 0 || n >= (int) sizeof(tmp_view_query) - pos){ + throw_error(p_file_infos[pfi_off]->chartname, ERR_TYPE_OTHER, n, __LINE__, __FILE__, __FUNCTION__); + sqlite3_close_v2(dbt); + return; + } + pos += n; + } + snprintf(&tmp_view_query[pos], sizeof(tmp_view_query) - pos, "%s", TMP_VIEW_QUERY_POSTFIX); + + if(unlikely( + SQLITE_OK != (rc = sqlite3_prepare_v2(dbt, tmp_view_query, -1, &stmt_create_tmp_view, NULL)) || + SQLITE_DONE != (rc = sqlite3_step(stmt_create_tmp_view)) || + SQLITE_OK != (rc = sqlite3_prepare_v2(dbt, p_query_params->order_by_asc ? + + "SELECT Timestamp, Msg_compr_size , Msg_decompr_size, " + "BLOB_Offset, FK_BLOB_Id, Num_lines, column1 " + "FROM " TMP_VIEW_TABLE " " + "WHERE Timestamp >= ? AND Timestamp <= ?;" : + + /* TODO: The following can also be done by defining + * a descending order tmp_view_query, which will + * probably be faster. Needs to be measured. */ + + "SELECT Timestamp, Msg_compr_size , Msg_decompr_size, " + "BLOB_Offset, FK_BLOB_Id, Num_lines, column1 " + "FROM " TMP_VIEW_TABLE " " + "WHERE Timestamp <= ? AND Timestamp >= ? ORDER BY Timestamp DESC;", + + -1, &stmt_get_log_msg_metadata, NULL)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_get_log_msg_metadata, 1, + (sqlite3_int64)p_query_params->req_from_ts)) || + SQLITE_OK != (rc = sqlite3_bind_int64(stmt_get_log_msg_metadata, 2, + (sqlite3_int64)p_query_params->req_to_ts)) || + (SQLITE_ROW != (rc = sqlite3_step(stmt_get_log_msg_metadata)) && (SQLITE_DONE != rc)) + )){ + throw_error(p_file_infos[0]->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + sqlite3_close_v2(dbt); + return; + } + } + + Circ_buff_item_t tmp_itm = {0}; + + BUFFER *const res_buff = p_query_params->results_buff; + logs_query_res_hdr_t res_hdr = { // results header + .timestamp = p_query_params->act_to_ts, + .text_size = 0, + .matches = 0, + .log_source = "", + .log_type = "", + .basename = "", + .filename = "", + .chartname ="" + }; + size_t text_compressed_size_max = 0; + + while (rc == SQLITE_ROW) { + + /* Retrieve metadata from DB */ + tmp_itm.timestamp = (msec_t)sqlite3_column_int64(stmt_get_log_msg_metadata, 0); + tmp_itm.text_compressed_size = (size_t)sqlite3_column_int64(stmt_get_log_msg_metadata, 1); + tmp_itm.text_size = (size_t)sqlite3_column_int64(stmt_get_log_msg_metadata, 2); + int64_t blob_offset = (int64_t) sqlite3_column_int64(stmt_get_log_msg_metadata, 3); + int blob_handles_offset = sqlite3_column_int(stmt_get_log_msg_metadata, 4); + unsigned long num_lines = (unsigned long) sqlite3_column_int64(stmt_get_log_msg_metadata, 5); + int db_off = p_file_infos[1] ? sqlite3_column_int(stmt_get_log_msg_metadata, 6) : 0; + + /* If exceeding quota or timeout is reached and new timestamp + * is different than previous, terminate query. */ + if((res_buff->len >= p_query_params->quota || terminate_logs_manag_query(p_query_params)) && + tmp_itm.timestamp != res_hdr.timestamp){ + p_query_params->act_to_ts = res_hdr.timestamp; + break; + } + + res_hdr.timestamp = tmp_itm.timestamp; + snprintfz(res_hdr.log_source, sizeof(res_hdr.log_source), "%s", log_src_t_str[p_file_infos[db_off]->log_source]); + snprintfz(res_hdr.log_type, sizeof(res_hdr.log_type), "%s", log_src_type_t_str[p_file_infos[db_off]->log_type]); + snprintfz(res_hdr.basename, sizeof(res_hdr.basename), "%s", p_file_infos[db_off]->file_basename); + snprintfz(res_hdr.filename, sizeof(res_hdr.filename), "%s", p_file_infos[db_off]->filename); + snprintfz(res_hdr.chartname, sizeof(res_hdr.chartname), "%s", p_file_infos[db_off]->chartname); + + /* Retrieve compressed log messages from BLOB file */ + if(tmp_itm.text_compressed_size > text_compressed_size_max){ + text_compressed_size_max = tmp_itm.text_compressed_size; + tmp_itm.text_compressed = reallocz(tmp_itm.text_compressed, text_compressed_size_max); + } + uv_fs_t read_req; + uv_buf_t uv_buf = uv_buf_init(tmp_itm.text_compressed, tmp_itm.text_compressed_size); + rc = uv_fs_read(NULL, + &read_req, + p_file_infos[db_off]->blob_handles[blob_handles_offset], + &uv_buf, 1, blob_offset, NULL); + uv_fs_req_cleanup(&read_req); + if (unlikely(rc < 0)){ + throw_error(NULL, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + break; + } + + /* Append retrieved results to BUFFER. + * In the case of search_keyword(), less than sizeof(res_hdr) + tmp_itm.text_size + *space may be required, but go for worst case scenario for now */ + buffer_increase(res_buff, sizeof(res_hdr) + tmp_itm.text_size); + + if(!p_query_params->keyword || !*p_query_params->keyword || !strcmp(p_query_params->keyword, " ")){ + rc = LZ4_decompress_safe(tmp_itm.text_compressed, + &res_buff->buffer[res_buff->len + sizeof(res_hdr)], + tmp_itm.text_compressed_size, + tmp_itm.text_size); + + if(unlikely(rc < 0)){ + throw_error(p_file_infos[db_off]->chartname, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + break; + } + + res_hdr.matches = num_lines; + res_hdr.text_size = tmp_itm.text_size; + } + else { + tmp_itm.data = mallocz(tmp_itm.text_size); + rc = LZ4_decompress_safe(tmp_itm.text_compressed, + tmp_itm.data, + tmp_itm.text_compressed_size, + tmp_itm.text_size); + + if(unlikely(rc < 0)){ + freez(tmp_itm.data); + throw_error(p_file_infos[db_off]->chartname, ERR_TYPE_OTHER, rc, __LINE__, __FILE__, __FUNCTION__); + break; + } + + res_hdr.matches = search_keyword( tmp_itm.data, tmp_itm.text_size, + &res_buff->buffer[res_buff->len + sizeof(res_hdr)], + &res_hdr.text_size, p_query_params->keyword, NULL, + p_query_params->ignore_case); + freez(tmp_itm.data); + + m_assert( (res_hdr.matches > 0 && res_hdr.text_size > 0) || + (res_hdr.matches == 0 && res_hdr.text_size == 0), + "res_hdr.matches and res_hdr.text_size must both be > 0 or == 0."); + + if(unlikely(res_hdr.matches < 0)){ /* res_hdr.matches < 0 - error during keyword search */ + throw_error(p_file_infos[db_off]->chartname, ERR_TYPE_LIBUV, rc, __LINE__, __FILE__, __FUNCTION__); + break; + } + } + + if(res_hdr.text_size){ + res_buff->buffer[res_buff->len + sizeof(res_hdr) + res_hdr.text_size - 1] = '\n'; // replace '\0' with '\n' + memcpy(&res_buff->buffer[res_buff->len], &res_hdr, sizeof(res_hdr)); + res_buff->len += sizeof(res_hdr) + res_hdr.text_size; + p_query_params->num_lines += res_hdr.matches; + } + + m_assert(TEST_MS_TIMESTAMP_VALID(res_hdr.timestamp), "res_hdr.timestamp is invalid"); + + rc = sqlite3_step(stmt_get_log_msg_metadata); + if (unlikely(rc != SQLITE_ROW && rc != SQLITE_DONE)){ + throw_error(p_file_infos[db_off]->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); + // TODO: If there are errors here, should db_writer_db_mode_full() be terminated? + break; + } + } + + if(tmp_itm.text_compressed) + freez(tmp_itm.text_compressed); + + if(p_file_infos[1]) + rc = sqlite3_close_v2(dbt); + else + rc = sqlite3_reset(stmt_get_log_msg_metadata); + + if (unlikely(SQLITE_OK != rc)) + throw_error(p_file_infos[0]->chartname, ERR_TYPE_SQLITE, rc, __LINE__, __FILE__, __FUNCTION__); +} |