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 MySQL
30 * These are MySQL specific routines -- hopefully all
31 * other files are generic.
33 * Kern Sibbald, March 2000
38 /* The following is necessary so that we do not include
39 * the dummy external definition of DB.
41 #define __SQL_C /* indicate that this is sql.c */
48 /* -----------------------------------------------------------------------
50 * MySQL dependent defines and subroutines
52 * -----------------------------------------------------------------------
55 /* List of open databases */
56 static dlist *db_list = NULL;
58 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
61 * Retrieve database type
70 * Initialize database data structure. In principal this should
71 * never have errors, or it is really fatal.
74 db_init_database(JCR *jcr, const char *db_name, const char *db_user, const char *db_password,
75 const char *db_address, int db_port, const char *db_socket,
76 int mult_db_connections)
81 Jmsg(jcr, M_FATAL, 0, _("A user name for MySQL must be supplied.\n"));
84 P(mutex); /* lock DB queue */
85 if (db_list == NULL) {
86 db_list = New(dlist(mdb, &mdb->link));
88 /* Look to see if DB already open */
89 if (!mult_db_connections) {
90 foreach_dlist(mdb, db_list) {
91 if (bstrcmp(mdb->db_name, db_name) &&
92 bstrcmp(mdb->db_address, db_address) &&
93 mdb->db_port == db_port) {
94 Dmsg2(100, "DB REopen %d %s\n", mdb->ref_count, db_name);
97 Dmsg3(100, "initdb ref=%d connected=%d db=%p\n", mdb->ref_count,
98 mdb->connected, mdb->db);
99 return mdb; /* already open */
103 Dmsg0(100, "db_open first time\n");
104 mdb = (B_DB *)malloc(sizeof(B_DB));
105 memset(mdb, 0, sizeof(B_DB));
106 mdb->db_name = bstrdup(db_name);
107 mdb->db_user = bstrdup(db_user);
109 mdb->db_password = bstrdup(db_password);
112 mdb->db_address = bstrdup(db_address);
115 mdb->db_socket = bstrdup(db_socket);
117 mdb->db_port = db_port;
118 mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
120 mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
121 mdb->cached_path = get_pool_memory(PM_FNAME);
122 mdb->cached_path_id = 0;
124 mdb->fname = get_pool_memory(PM_FNAME);
125 mdb->path = get_pool_memory(PM_FNAME);
126 mdb->esc_name = get_pool_memory(PM_FNAME);
127 mdb->esc_path = get_pool_memory(PM_FNAME);
128 mdb->allow_transactions = mult_db_connections;
129 db_list->append(mdb); /* put db in list */
130 Dmsg3(100, "initdb ref=%d connected=%d db=%p\n", mdb->ref_count,
131 mdb->connected, mdb->db);
137 * Now actually open the database. This can generate errors,
138 * which are returned in the errmsg
140 * DO NOT close the database or free(mdb) here !!!!
143 db_open_database(JCR *jcr, B_DB *mdb)
148 if (mdb->connected) {
153 if ((errstat=rwl_init(&mdb->lock)) != 0) {
155 Mmsg1(&mdb->errmsg, _("Unable to initialize DB lock. ERR=%s\n"),
156 be.bstrerror(errstat));
161 /* connect to the database */
162 #ifdef xHAVE_EMBEDDED_MYSQL
163 // mysql_server_init(0, NULL, NULL);
165 mysql_init(&mdb->mysql);
167 Dmsg0(50, "mysql_init done\n");
168 /* If connection fails, try at 5 sec intervals for 30 seconds. */
169 for (int retry=0; retry < 6; retry++) {
170 mdb->db = mysql_real_connect(
171 &(mdb->mysql), /* db */
172 mdb->db_address, /* default = localhost */
173 mdb->db_user, /* login name */
174 mdb->db_password, /* password */
175 mdb->db_name, /* database name */
176 mdb->db_port, /* default port */
177 mdb->db_socket, /* default = socket */
178 CLIENT_FOUND_ROWS); /* flags */
180 /* If no connect, try once more in case it is a timing problem */
181 if (mdb->db != NULL) {
187 mdb->mysql.reconnect = 1; /* so connection does not timeout */
188 Dmsg0(50, "mysql_real_connect done\n");
189 Dmsg3(50, "db_user=%s db_name=%s db_password=%s\n", mdb->db_user, mdb->db_name,
190 mdb->db_password==NULL?"(NULL)":mdb->db_password);
192 if (mdb->db == NULL) {
193 Mmsg2(&mdb->errmsg, _("Unable to connect to MySQL server.\n"
194 "Database=%s User=%s\n"
195 "MySQL connect failed either server not running or your authorization is incorrect.\n"),
196 mdb->db_name, mdb->db_user);
197 #if MYSQL_VERSION_ID >= 40101
198 Dmsg3(50, "Error %u (%s): %s\n",
199 mysql_errno(&(mdb->mysql)), mysql_sqlstate(&(mdb->mysql)),
200 mysql_error(&(mdb->mysql)));
202 Dmsg2(50, "Error %u: %s\n",
203 mysql_errno(&(mdb->mysql)), mysql_error(&(mdb->mysql)));
209 mdb->connected = true;
210 if (!check_tables_version(jcr, mdb)) {
215 Dmsg3(100, "opendb ref=%d connected=%d db=%p\n", mdb->ref_count,
216 mdb->connected, mdb->db);
218 /* Set connection timeout to 8 days specialy for batch mode */
219 sql_query(mdb, "SET wait_timeout=691200");
220 sql_query(mdb, "SET interactive_timeout=691200");
227 db_close_database(JCR *jcr, B_DB *mdb)
232 db_end_transaction(jcr, mdb);
234 sql_free_result(mdb);
236 Dmsg3(100, "closedb ref=%d connected=%d db=%p\n", mdb->ref_count,
237 mdb->connected, mdb->db);
238 if (mdb->ref_count == 0) {
239 db_list->remove(mdb);
240 if (mdb->connected) {
241 Dmsg1(100, "close db=%p\n", mdb->db);
242 mysql_close(&mdb->mysql);
244 #ifdef xHAVE_EMBEDDED_MYSQL
245 // mysql_server_end();
248 rwl_destroy(&mdb->lock);
249 free_pool_memory(mdb->errmsg);
250 free_pool_memory(mdb->cmd);
251 free_pool_memory(mdb->cached_path);
252 free_pool_memory(mdb->fname);
253 free_pool_memory(mdb->path);
254 free_pool_memory(mdb->esc_name);
255 free_pool_memory(mdb->esc_path);
262 if (mdb->db_password) {
263 free(mdb->db_password);
265 if (mdb->db_address) {
266 free(mdb->db_address);
268 if (mdb->db_socket) {
269 free(mdb->db_socket);
272 if (db_list->size() == 0) {
280 void db_check_backend_thread_safe()
282 #ifdef HAVE_BATCH_FILE_INSERT
283 if (!mysql_thread_safe()) {
284 Emsg0(M_ABORT, 0, _("MySQL client library must be thread-safe "
285 "when using BatchMode.\n"));
291 * This call is needed because the message channel thread
292 * opens a database on behalf of a jcr that was created in
293 * a different thread. MySQL then allocates thread specific
294 * data, which is NOT freed when the original jcr thread
295 * closes the database. Thus the msgchan must call here
296 * to cleanup any thread specific data that it created.
298 void db_thread_cleanup()
306 * Return the next unique index (auto-increment) for
307 * the given table. Return NULL on error.
309 * For MySQL, NULL causes the auto-increment value
312 int db_next_index(JCR *jcr, B_DB *mdb, char *table, char *index)
314 strcpy(index, "NULL");
320 * Escape strings so that MySQL is happy
322 * NOTE! len is the length of the old string. Your new
323 * string must be long enough (max 2*old+1) to hold
324 * the escaped output.
327 db_escape_string(JCR *jcr, B_DB *mdb, char *snew, char *old, int len)
329 mysql_real_escape_string(mdb->db, snew, old, len);
333 * Submit a general SQL command (cmd), and for each row returned,
334 * the sqlite_handler is called with the ctx.
336 bool db_sql_query(B_DB *mdb, const char *query, DB_RESULT_HANDLER *result_handler, void *ctx)
342 if (sql_query(mdb, query) != 0) {
343 Mmsg(mdb->errmsg, _("Query failed: %s: ERR=%s\n"), query, sql_strerror(mdb));
347 if (result_handler != NULL) {
348 if ((mdb->result = sql_use_result(mdb)) != NULL) {
349 int num_fields = sql_num_fields(mdb);
351 /* We *must* fetch all rows */
352 while ((row = sql_fetch_row(mdb)) != NULL) {
354 /* the result handler returns 1 when it has
355 * seen all the data it wants. However, we
356 * loop to the end of the data.
358 if (result_handler(ctx, num_fields, row)) {
364 sql_free_result(mdb);
372 void my_mysql_free_result(B_DB *mdb)
376 mysql_free_result(mdb->result);
382 int my_mysql_insert_autokey_record(B_DB *mdb, const char *query, const char *table_name)
385 * First execute the insert query and then retrieve the currval.
387 if (mysql_query(mdb->db, query)) {
391 mdb->num_rows = sql_affected_rows(mdb);
392 if (mdb->num_rows != 1) {
398 return mysql_insert_id(mdb->db);
402 #ifdef HAVE_BATCH_FILE_INSERT
403 const char *my_mysql_batch_lock_path_query =
404 "LOCK TABLES Path write, batch write, Path as p write";
407 const char *my_mysql_batch_lock_filename_query =
408 "LOCK TABLES Filename write, batch write, Filename as f write";
410 const char *my_mysql_batch_unlock_tables_query = "UNLOCK TABLES";
412 const char *my_mysql_batch_fill_path_query =
413 "INSERT INTO Path (Path) "
414 "SELECT a.Path FROM "
415 "(SELECT DISTINCT Path FROM batch) AS a WHERE NOT EXISTS "
416 "(SELECT Path FROM Path AS p WHERE p.Path = a.Path)";
418 const char *my_mysql_batch_fill_filename_query =
419 "INSERT INTO Filename (Name) "
420 "SELECT a.Name FROM "
421 "(SELECT DISTINCT Name FROM batch) AS a WHERE NOT EXISTS "
422 "(SELECT Name FROM Filename AS f WHERE f.Name = a.Name)";
423 #endif /* HAVE_BATCH_FILE_INSERT */
425 #endif /* HAVE_MYSQL */