2 Bacula® - The Network Backup Solution
4 Copyright (C) 2000-2010 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version two of the GNU General Public
10 License as published by the Free Software Foundation and included
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * Bacula Catalog Database routines specific to SQLite
31 * Kern Sibbald, January 2002
37 /* The following is necessary so that we do not include
38 * the dummy external definition of DB.
40 #define __SQL_C /* indicate that this is sql.c */
45 #if HAVE_SQLITE || HAVE_SQLITE3
47 /* -----------------------------------------------------------------------
49 * SQLite dependent defines and subroutines
51 * -----------------------------------------------------------------------
54 /* List of open databases */
55 static dlist *db_list = NULL;
57 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
60 * Retrieve database type
73 * When using mult_db_connections = 1,
74 * sqlite can be BUSY. We just need sleep a little in this case.
78 static int my_busy_handler(void *arg, int calls)
84 static int my_busy_handler(void *arg, const char* p, int calls)
93 * Initialize database data structure. In principal this should
94 * never have errors, or it is really fatal.
97 db_init_database(JCR *jcr, const char *db_name, const char *db_user, const char *db_password,
98 const char *db_address, int db_port, const char *db_socket,
99 int mult_db_connections)
103 P(mutex); /* lock DB queue */
104 if (db_list == NULL) {
105 db_list = New(dlist(mdb, &mdb->link));
107 /* Look to see if DB already open */
108 if (!mult_db_connections) {
109 foreach_dlist(mdb, db_list) {
110 if (bstrcmp(mdb->db_name, db_name) &&
111 bstrcmp(mdb->db_address, db_address) &&
112 mdb->db_port == db_port) {
113 Dmsg2(300, "DB REopen %d %s\n", mdb->ref_count, db_name);
116 return mdb; /* already open */
120 Dmsg0(300, "db_open first time\n");
121 mdb = (B_DB *)malloc(sizeof(B_DB));
122 memset(mdb, 0, sizeof(B_DB));
123 mdb->db_name = bstrdup(db_name);
124 mdb->have_insert_id = true;
125 mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
127 mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
128 mdb->cached_path = get_pool_memory(PM_FNAME);
129 mdb->cached_path_id = 0;
131 mdb->fname = get_pool_memory(PM_FNAME);
132 mdb->path = get_pool_memory(PM_FNAME);
133 mdb->esc_name = get_pool_memory(PM_FNAME);
134 mdb->esc_path = get_pool_memory(PM_FNAME);
135 mdb->allow_transactions = mult_db_connections;
136 db_list->append(mdb);
142 * Now actually open the database. This can generate errors,
143 * which are returned in the errmsg
145 * DO NOT close the database or free(mdb) here !!!!
148 db_open_database(JCR *jcr, B_DB *mdb)
157 if (mdb->connected) {
161 mdb->connected = FALSE;
163 if ((errstat=rwl_init(&mdb->lock)) != 0) {
165 Mmsg1(&mdb->errmsg, _("Unable to initialize DB lock. ERR=%s\n"),
166 be.bstrerror(errstat));
171 /* open the database */
172 len = strlen(working_directory) + strlen(mdb->db_name) + 5;
173 db_name = (char *)malloc(len);
174 strcpy(db_name, working_directory);
175 strcat(db_name, "/");
176 strcat(db_name, mdb->db_name);
177 strcat(db_name, ".db");
178 if (stat(db_name, &statbuf) != 0) {
179 Mmsg1(&mdb->errmsg, _("Database %s does not exist, please create it.\n"),
186 for (mdb->db=NULL; !mdb->db && retry++ < 10; ) {
188 int stat = sqlite3_open(db_name, &mdb->db);
189 if (stat != SQLITE_OK) {
190 mdb->sqlite_errmsg = (char *)sqlite3_errmsg(mdb->db);
191 sqlite3_close(mdb->db);
194 mdb->sqlite_errmsg = NULL;
197 mdb->db = sqlite_open(
198 db_name, /* database name */
200 &mdb->sqlite_errmsg); /* error message */
203 Dmsg0(300, "sqlite_open\n");
208 if (mdb->db == NULL) {
209 Mmsg2(&mdb->errmsg, _("Unable to open Database=%s. ERR=%s\n"),
210 db_name, mdb->sqlite_errmsg ? mdb->sqlite_errmsg : _("unknown"));
215 mdb->connected = true;
218 /* set busy handler to wait when we use mult_db_connections = 1 */
220 sqlite3_busy_handler(mdb->db, my_busy_handler, NULL);
222 sqlite_busy_handler(mdb->db, my_busy_handler, NULL);
225 #if defined(HAVE_SQLITE3) && defined(SQLITE3_INIT_QUERY)
226 db_sql_query(mdb, SQLITE3_INIT_QUERY, NULL, NULL);
229 if (!check_tables_version(jcr, mdb)) {
240 db_close_database(JCR *jcr, B_DB *mdb)
245 db_end_transaction(jcr, mdb);
247 sql_free_result(mdb);
249 if (mdb->ref_count == 0) {
250 db_list->remove(mdb);
251 if (mdb->connected && mdb->db) {
252 sqlite_close(mdb->db);
254 rwl_destroy(&mdb->lock);
255 free_pool_memory(mdb->errmsg);
256 free_pool_memory(mdb->cmd);
257 free_pool_memory(mdb->cached_path);
258 free_pool_memory(mdb->fname);
259 free_pool_memory(mdb->path);
260 free_pool_memory(mdb->esc_name);
261 free_pool_memory(mdb->esc_path);
266 if (db_list->size() == 0) {
274 void db_check_backend_thread_safe()
276 #ifdef HAVE_BATCH_FILE_INSERT
277 # ifdef HAVE_SQLITE3_THREADSAFE
278 if (!sqlite3_threadsafe()) {
279 Emsg0(M_ABORT, 0, _("SQLite3 client library must be thread-safe "
280 "when using BatchMode.\n"));
286 void db_thread_cleanup()
289 sqlite3_thread_cleanup();
294 * Return the next unique index (auto-increment) for
295 * the given table. Return 0 on error.
297 int db_next_index(JCR *jcr, B_DB *mdb, char *table, char *index)
299 strcpy(index, "NULL");
305 * Escape strings so that SQLite is happy
307 * NOTE! len is the length of the old string. Your new
308 * string must be long enough (max 2*old+1) to hold
309 * the escaped output.
312 db_escape_string(JCR *jcr, B_DB *db, char *snew, char *old, int len)
339 DB_RESULT_HANDLER *result_handler;
344 * Convert SQLite's callback into Bacula DB callback
346 static int sqlite_result(void *arh_data, int num_fields, char **rows, char **col_names)
348 struct rh_data *rh_data = (struct rh_data *)arh_data;
350 if (rh_data->result_handler) {
351 (*(rh_data->result_handler))(rh_data->ctx, num_fields, rows);
357 * Submit a general SQL command (cmd), and for each row returned,
358 * the sqlite_handler is called with the ctx.
360 bool db_sql_query(B_DB *mdb, const char *query, DB_RESULT_HANDLER *result_handler, void *ctx)
362 struct rh_data rh_data;
366 if (mdb->sqlite_errmsg) {
368 sqlite3_free(mdb->sqlite_errmsg);
370 actuallyfree(mdb->sqlite_errmsg);
372 mdb->sqlite_errmsg = NULL;
374 rh_data.result_handler = result_handler;
376 stat = sqlite_exec(mdb->db, query, sqlite_result, (void *)&rh_data, &mdb->sqlite_errmsg);
377 if (stat != SQLITE_OK) {
378 Mmsg(mdb->errmsg, _("Query failed: %s: ERR=%s\n"), query, sql_strerror(mdb));
387 * Submit a sqlite query and retrieve all the data
389 int my_sqlite_query(B_DB *mdb, const char *cmd)
393 my_sqlite_free_table(mdb);
394 if (mdb->sqlite_errmsg) {
396 sqlite3_free(mdb->sqlite_errmsg);
398 actuallyfree(mdb->sqlite_errmsg);
400 mdb->sqlite_errmsg = NULL;
402 stat = sqlite_get_table(mdb->db, (char *)cmd, &mdb->result, &mdb->nrow, &mdb->ncolumn,
403 &mdb->sqlite_errmsg);
404 mdb->row = 0; /* no row fetched yet */
405 if (stat != 0) { /* something went wrong */
406 mdb->nrow = mdb->ncolumn = 0;
411 /* Fetch one row at a time */
412 SQL_ROW my_sqlite_fetch_row(B_DB *mdb)
414 if (!mdb->result || (mdb->row >= mdb->nrow)) {
418 return &mdb->result[mdb->ncolumn * mdb->row];
421 void my_sqlite_free_table(B_DB *mdb)
425 if (mdb->fields_defined) {
426 for (i=0; i < sql_num_fields(mdb); i++) {
427 if (mdb->fields[i]) {
428 free(mdb->fields[i]);
429 mdb->fields[i] = NULL;
436 mdb->fields_defined = false;
439 sqlite_free_table(mdb->result);
442 mdb->nrow = mdb->ncolumn = 0;
445 void my_sqlite_field_seek(B_DB *mdb, int field)
448 if (mdb->result == NULL) {
452 /* On first call, set up the fields */
453 if (!mdb->fields_defined && sql_num_fields(mdb) > 0) {
454 mdb->fields = (SQL_FIELD **)malloc(sizeof(SQL_FIELD) * mdb->ncolumn);
455 for (i=0; i < sql_num_fields(mdb); i++) {
456 mdb->fields[i] = (SQL_FIELD *)malloc(sizeof(SQL_FIELD));
457 if (mdb->result[i] == NULL) {
458 mdb->fields_defined = false;
464 mdb->fields[i]->name = mdb->result[i];
465 mdb->fields[i]->length = cstrlen(mdb->fields[i]->name);
466 mdb->fields[i]->max_length = mdb->fields[i]->length;
467 for (j=1; j <= mdb->nrow; j++) {
469 if (mdb->result[i + mdb->ncolumn *j]) {
470 len = (uint32_t)cstrlen(mdb->result[i + mdb->ncolumn * j]);
474 if (len > mdb->fields[i]->max_length) {
475 mdb->fields[i]->max_length = len;
478 mdb->fields[i]->type = 0;
479 mdb->fields[i]->flags = 1; /* not null */
481 mdb->fields_defined = true;
483 if (sql_num_fields(mdb) <= 0) {
485 } else if (field > sql_num_fields(mdb) - 1) {
486 field = sql_num_fields(mdb) - 1;
491 SQL_FIELD *my_sqlite_fetch_field(B_DB *mdb)
493 if (mdb->fields_defined && mdb->field < sql_num_fields(mdb)) {
494 return mdb->fields[mdb->field++];
501 #ifdef HAVE_BATCH_FILE_INSERT
502 const char *my_sqlite_batch_lock_query = "BEGIN";
503 const char *my_sqlite_batch_unlock_query = "COMMIT";
505 const char *my_sqlite_batch_fill_path_query =
506 "INSERT INTO Path (Path)"
507 " SELECT DISTINCT Path FROM batch"
508 " EXCEPT SELECT Path FROM Path";
510 const char *my_sqlite_batch_fill_filename_query =
511 "INSERT INTO Filename (Name)"
512 " SELECT DISTINCT Name FROM batch "
513 " EXCEPT SELECT Name FROM Filename";
514 #endif /* HAVE_BATCH_FILE_INSERT */
517 #endif /* HAVE_SQLITE */