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 db_check_backend_thread_safe();
104 Dmsg0(100, "db_open first time\n");
105 mdb = (B_DB *)malloc(sizeof(B_DB));
106 memset(mdb, 0, sizeof(B_DB));
107 mdb->db_name = bstrdup(db_name);
108 mdb->db_user = bstrdup(db_user);
110 mdb->db_password = bstrdup(db_password);
113 mdb->db_address = bstrdup(db_address);
116 mdb->db_socket = bstrdup(db_socket);
118 mdb->db_port = db_port;
119 mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
121 mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
122 mdb->cached_path = get_pool_memory(PM_FNAME);
123 mdb->cached_path_id = 0;
125 mdb->fname = get_pool_memory(PM_FNAME);
126 mdb->path = get_pool_memory(PM_FNAME);
127 mdb->esc_name = get_pool_memory(PM_FNAME);
128 mdb->esc_path = get_pool_memory(PM_FNAME);
129 mdb->allow_transactions = mult_db_connections;
130 db_list->append(mdb); /* put db in list */
131 Dmsg3(100, "initdb ref=%d connected=%d db=%p\n", mdb->ref_count,
132 mdb->connected, mdb->db);
138 * Now actually open the database. This can generate errors,
139 * which are returned in the errmsg
141 * DO NOT close the database or free(mdb) here !!!!
144 db_open_database(JCR *jcr, B_DB *mdb)
149 if (mdb->connected) {
154 if ((errstat=rwl_init(&mdb->lock)) != 0) {
156 Mmsg1(&mdb->errmsg, _("Unable to initialize DB lock. ERR=%s\n"),
157 be.bstrerror(errstat));
162 /* connect to the database */
163 #ifdef xHAVE_EMBEDDED_MYSQL
164 // mysql_server_init(0, NULL, NULL);
166 mysql_init(&mdb->mysql);
168 Dmsg0(50, "mysql_init done\n");
169 /* If connection fails, try at 5 sec intervals for 30 seconds. */
170 for (int retry=0; retry < 6; retry++) {
171 mdb->db = mysql_real_connect(
172 &(mdb->mysql), /* db */
173 mdb->db_address, /* default = localhost */
174 mdb->db_user, /* login name */
175 mdb->db_password, /* password */
176 mdb->db_name, /* database name */
177 mdb->db_port, /* default port */
178 mdb->db_socket, /* default = socket */
179 CLIENT_FOUND_ROWS); /* flags */
181 /* If no connect, try once more in case it is a timing problem */
182 if (mdb->db != NULL) {
188 mdb->mysql.reconnect = 1; /* so connection does not timeout */
189 Dmsg0(50, "mysql_real_connect done\n");
190 Dmsg3(50, "db_user=%s db_name=%s db_password=%s\n", mdb->db_user, mdb->db_name,
191 mdb->db_password==NULL?"(NULL)":mdb->db_password);
193 if (mdb->db == NULL) {
194 Mmsg2(&mdb->errmsg, _("Unable to connect to MySQL server.\n"
195 "Database=%s User=%s\n"
196 "MySQL connect failed either server not running or your authorization is incorrect.\n"),
197 mdb->db_name, mdb->db_user);
198 #if MYSQL_VERSION_ID >= 40101
199 Dmsg3(50, "Error %u (%s): %s\n",
200 mysql_errno(&(mdb->mysql)), mysql_sqlstate(&(mdb->mysql)),
201 mysql_error(&(mdb->mysql)));
203 Dmsg2(50, "Error %u: %s\n",
204 mysql_errno(&(mdb->mysql)), mysql_error(&(mdb->mysql)));
210 mdb->connected = true;
211 if (!check_tables_version(jcr, mdb)) {
216 Dmsg3(100, "opendb ref=%d connected=%d db=%p\n", mdb->ref_count,
217 mdb->connected, mdb->db);
219 /* Set connection timeout to 8 days specialy for batch mode */
220 sql_query(mdb, "SET wait_timeout=691200");
221 sql_query(mdb, "SET interactive_timeout=691200");
228 db_close_database(JCR *jcr, B_DB *mdb)
233 db_end_transaction(jcr, mdb);
235 sql_free_result(mdb);
237 Dmsg3(100, "closedb ref=%d connected=%d db=%p\n", mdb->ref_count,
238 mdb->connected, mdb->db);
239 if (mdb->ref_count == 0) {
240 db_list->remove(mdb);
241 if (mdb->connected) {
242 Dmsg1(100, "close db=%p\n", mdb->db);
243 mysql_close(&mdb->mysql);
245 #ifdef xHAVE_EMBEDDED_MYSQL
246 // mysql_server_end();
249 rwl_destroy(&mdb->lock);
250 free_pool_memory(mdb->errmsg);
251 free_pool_memory(mdb->cmd);
252 free_pool_memory(mdb->cached_path);
253 free_pool_memory(mdb->fname);
254 free_pool_memory(mdb->path);
255 free_pool_memory(mdb->esc_name);
256 free_pool_memory(mdb->esc_path);
263 if (mdb->db_password) {
264 free(mdb->db_password);
266 if (mdb->db_address) {
267 free(mdb->db_address);
269 if (mdb->db_socket) {
270 free(mdb->db_socket);
273 if (db_list->size() == 0) {
281 void db_check_backend_thread_safe()
283 #ifdef HAVE_BATCH_FILE_INSERT
284 if (!mysql_thread_safe()) {
285 Emsg0(M_ABORT, 0, _("MySQL client library must be thread-safe "
286 "when using BatchMode.\n"));
292 * This call is needed because the message channel thread
293 * opens a database on behalf of a jcr that was created in
294 * a different thread. MySQL then allocates thread specific
295 * data, which is NOT freed when the original jcr thread
296 * closes the database. Thus the msgchan must call here
297 * to cleanup any thread specific data that it created.
299 void db_thread_cleanup()
307 * Return the next unique index (auto-increment) for
308 * the given table. Return NULL on error.
310 * For MySQL, NULL causes the auto-increment value
313 int db_next_index(JCR *jcr, B_DB *mdb, char *table, char *index)
315 strcpy(index, "NULL");
321 * Escape strings so that MySQL is happy
323 * NOTE! len is the length of the old string. Your new
324 * string must be long enough (max 2*old+1) to hold
325 * the escaped output.
328 db_escape_string(JCR *jcr, B_DB *mdb, char *snew, char *old, int len)
330 mysql_real_escape_string(mdb->db, snew, old, len);
334 * Submit a general SQL command (cmd), and for each row returned,
335 * the sqlite_handler is called with the ctx.
337 bool db_sql_query(B_DB *mdb, const char *query, DB_RESULT_HANDLER *result_handler, void *ctx)
343 if (sql_query(mdb, query) != 0) {
344 Mmsg(mdb->errmsg, _("Query failed: %s: ERR=%s\n"), query, sql_strerror(mdb));
348 if (result_handler != NULL) {
349 if ((mdb->result = sql_use_result(mdb)) != NULL) {
350 int num_fields = sql_num_fields(mdb);
352 /* We *must* fetch all rows */
353 while ((row = sql_fetch_row(mdb)) != NULL) {
355 /* the result handler returns 1 when it has
356 * seen all the data it wants. However, we
357 * loop to the end of the data.
359 if (result_handler(ctx, num_fields, row)) {
365 sql_free_result(mdb);
373 void my_mysql_free_result(B_DB *mdb)
377 mysql_free_result(mdb->result);
383 int my_mysql_insert_autokey_record(B_DB *mdb, const char *query, const char *table_name)
386 * First execute the insert query and then retrieve the currval.
388 if (mysql_query(mdb->db, query)) {
392 mdb->num_rows = sql_affected_rows(mdb);
393 if (mdb->num_rows != 1) {
399 return mysql_insert_id(mdb->db);
403 #ifdef HAVE_BATCH_FILE_INSERT
404 const char *my_mysql_batch_lock_path_query =
405 "LOCK TABLES Path write, batch write, Path as p write";
408 const char *my_mysql_batch_lock_filename_query =
409 "LOCK TABLES Filename write, batch write, Filename as f write";
411 const char *my_mysql_batch_unlock_tables_query = "UNLOCK TABLES";
413 const char *my_mysql_batch_fill_path_query =
414 "INSERT INTO Path (Path) "
415 "SELECT a.Path FROM "
416 "(SELECT DISTINCT Path FROM batch) AS a WHERE NOT EXISTS "
417 "(SELECT Path FROM Path AS p WHERE p.Path = a.Path)";
419 const char *my_mysql_batch_fill_filename_query =
420 "INSERT INTO Filename (Name) "
421 "SELECT a.Name FROM "
422 "(SELECT DISTINCT Name FROM batch) AS a WHERE NOT EXISTS "
423 "(SELECT Name FROM Filename AS f WHERE f.Name = a.Name)";
424 #endif /* HAVE_BATCH_FILE_INSERT */
426 #endif /* HAVE_MYSQL */