2 This file is part of GNUnet
3 (C) 2006, 2009, 2010 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file datacache/plugin_datacache_mysql.c
23 * @brief mysql for an implementation of a database backend for the datacache
24 * @author Christian Grothoff
28 * 1) Access mysql as root,
34 * and do the following. [You should replace $USER with the username
35 * that will be running the gnunetd process].
37 CREATE DATABASE gnunet;
38 GRANT select,insert,update,delete,create,alter,drop,create temporary tables
39 ON gnunet.* TO $USER@localhost;
40 SET PASSWORD FOR $USER@localhost=PASSWORD('$the_password_you_like');
43 * 2) In the $HOME directory of $USER, create a ".my.cnf" file
44 * with the following lines
48 password=$the_password_you_like
51 * Thats it -- now you can configure your datastores in GNUnet to
52 * use MySQL. Note that .my.cnf file is a security risk unless its on
53 * a safe partition etc. The $HOME/.my.cnf can of course be a symbolic
54 * link. Even greater security risk can be achieved by setting no
55 * password for $USER. Luckily $USER has only priviledges to mess
56 * up GNUnet's tables, nothing else (unless you give him more,
59 * 3) Still, perhaps you should briefly try if the DB connection
60 * works. First, login as $USER. Then use,
62 $ mysql -u $USER -p $the_password_you_like
66 * If you get the message "Database changed" it probably works.
68 * [If you get "ERROR 2002: Can't connect to local MySQL server
69 * through socket '/tmp/mysql.sock' (2)" it may be resolvable by
70 * "ln -s /var/run/mysqld/mysqld.sock /tmp/mysql.sock"
71 * so there may be some additional trouble depending on your mysql setup.]
75 * If you have problems related to the mysql module, your best
76 * friend is probably the mysql manual. The first thing to check
77 * is that mysql is basically operational, that you can connect
78 * to it, create tables, issue queries etc.
81 #include "gnunet_util_lib.h"
82 #include "gnunet_datacache_plugin.h"
83 #include <mysql/mysql.h>
85 #define DEBUG_DATACACHE_MYSQL GNUNET_NO
88 * Estimate of the per-entry overhead (including indices).
90 #define OVERHEAD ((4*2+4*2+8*2+8*2+sizeof(GNUNET_HashCode)*5+8))
93 * Maximum number of supported parameters for a prepared
94 * statement. Increase if needed.
99 * Die with an error message that indicates
100 * a failure of the command 'cmd' with the message given
101 * by strerror(errno).
103 #define DIE_MYSQL(cmd, dbh) do { GNUNET_log(GNUNET_ERROR_TYPE__ERROR, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, mysql_error((dbh)->dbf)); abort(); } while(0);
106 * Log an error message at log-level 'level' that indicates
107 * a failure of the command 'cmd' on file 'filename'
108 * with the message given by strerror(errno).
110 #define LOG_MYSQL(level, cmd, dbh) do { GNUNET_log(level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, mysql_error((dbh)->dbf)); } while(0);
112 struct GNUNET_MysqlStatementHandle
114 struct GNUNET_MysqlStatementHandle *next;
116 struct GNUNET_MysqlStatementHandle *prev;
120 MYSQL_STMT *statement;
128 * Context for all functions in this plugin.
133 * Our execution environment.
135 struct GNUNET_DATACACHE_PluginEnvironment *env;
138 * Handle to the mysql database.
142 struct GNUNET_MysqlStatementHandle *shead;
144 struct GNUNET_MysqlStatementHandle *stail;
147 * Filename of "my.cnf" (msyql configuration).
151 #define SELECT_VALUE_STMT "SELECT value,expire FROM gn080dstore FORCE INDEX (hashidx) WHERE hash=? AND type=? AND expire >= ? LIMIT 1 OFFSET ?"
152 struct GNUNET_MysqlStatementHandle *select_value;
154 #define COUNT_VALUE_STMT "SELECT count(*) FROM gn080dstore FORCE INDEX (hashidx) WHERE hash=? AND type=? AND expire >= ?"
155 struct GNUNET_MysqlStatementHandle *count_value;
157 #define SELECT_OLD_VALUE_STMT "SELECT hash, vhash, type, value FROM gn080dstore FORCE INDEX (expireidx) ORDER BY puttime ASC LIMIT 1"
158 struct GNUNET_MysqlStatementHandle *select_old_value;
160 #define DELETE_VALUE_STMT "DELETE FROM gn080dstore WHERE hash = ? AND vhash = ? AND type = ? AND value = ?"
161 struct GNUNET_MysqlStatementHandle *delete_value;
163 #define INSERT_VALUE_STMT "INSERT INTO gn080dstore (type, puttime, expire, hash, vhash, value) "\
164 "VALUES (?, ?, ?, ?, ?, ?)"
165 struct GNUNET_MysqlStatementHandle *insert_value;
167 #define UPDATE_VALUE_STMT "UPDATE gn080dstore FORCE INDEX (allidx) SET puttime=?, expire=? "\
168 "WHERE hash=? AND vhash=? AND type=?"
169 struct GNUNET_MysqlStatementHandle *update_value;
175 * Obtain the location of ".my.cnf".
177 * @param cfg our configuration
178 * @return NULL on error
181 get_my_cnf_path (const struct GNUNET_CONFIGURATION_Handle *cfg)
192 pw = getpwuid (getuid ());
195 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
200 GNUNET_CONFIGURATION_have_value (cfg,
201 "datacache-mysql", "CONFIG"))
203 GNUNET_assert (GNUNET_OK ==
204 GNUNET_CONFIGURATION_get_value_filename (cfg,
205 "datacache-mysql", "CONFIG", &cnffile));
206 configured = GNUNET_YES;
210 home_dir = GNUNET_strdup (pw->pw_dir);
212 home_dir = (char *) GNUNET_malloc (_MAX_PATH + 1);
213 plibc_conv_to_win_path ("~/", home_dir);
215 GNUNET_asprintf (&cnffile, "%s/.my.cnf", home_dir);
216 GNUNET_free (home_dir);
217 configured = GNUNET_NO;
219 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
220 _("Trying to use file `%s' for MySQL configuration.\n"),
222 if ((0 != STAT (cnffile, &st)) ||
223 (0 != ACCESS (cnffile, R_OK)) || (!S_ISREG (st.st_mode)))
225 if (configured == GNUNET_YES)
226 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
227 _("Could not access file `%s': %s\n"), cnffile,
229 GNUNET_free (cnffile);
237 * Free a prepared statement.
239 * @param plugin plugin context
240 * @param s prepared statement
243 prepared_statement_destroy (struct Plugin *plugin,
244 struct GNUNET_MysqlStatementHandle
247 GNUNET_CONTAINER_DLL_remove (plugin->shead,
251 mysql_stmt_close (s->statement);
252 GNUNET_free (s->query);
258 * Close database connection and all prepared statements (we got a DB
262 iclose (struct Plugin *plugin)
264 while (NULL != plugin->shead)
265 prepared_statement_destroy (plugin,
267 if (plugin->dbf != NULL)
269 mysql_close (plugin->dbf);
277 * Open the connection with the database (and initialize
278 * our default options).
280 * @return GNUNET_OK on success
283 iopen (struct Plugin *ret)
288 char *mysql_password;
289 unsigned long long mysql_port;
291 unsigned int timeout;
293 ret->dbf = mysql_init (NULL);
294 if (ret->dbf == NULL)
295 return GNUNET_SYSERR;
296 if (ret->cnffile != NULL)
297 mysql_options (ret->dbf, MYSQL_READ_DEFAULT_FILE, ret->cnffile);
298 mysql_options (ret->dbf, MYSQL_READ_DEFAULT_GROUP, "client");
300 mysql_options (ret->dbf, MYSQL_OPT_RECONNECT, &reconnect);
301 mysql_options (ret->dbf,
302 MYSQL_OPT_CONNECT_TIMEOUT, (const void *) &timeout);
303 mysql_options(ret->dbf, MYSQL_SET_CHARSET_NAME, "UTF8");
304 timeout = 60; /* in seconds */
305 mysql_options (ret->dbf, MYSQL_OPT_READ_TIMEOUT, (const void *) &timeout);
306 mysql_options (ret->dbf, MYSQL_OPT_WRITE_TIMEOUT, (const void *) &timeout);
308 if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (ret->env->cfg,
309 "datacache-mysql", "DATABASE"))
310 GNUNET_assert (GNUNET_OK ==
311 GNUNET_CONFIGURATION_get_value_string (ret->env->cfg,
312 "datacache-mysql", "DATABASE",
315 mysql_dbname = GNUNET_strdup ("gnunet");
317 if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (ret->env->cfg,
318 "datacache-mysql", "USER"))
320 GNUNET_assert (GNUNET_OK ==
321 GNUNET_CONFIGURATION_get_value_string (ret->env->cfg,
322 "datacache-mysql", "USER",
325 mysql_password = NULL;
326 if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (ret->env->cfg,
327 "datacache-mysql", "PASSWORD"))
329 GNUNET_assert (GNUNET_OK ==
330 GNUNET_CONFIGURATION_get_value_string (ret->env->cfg,
331 "datacache-mysql", "PASSWORD",
335 if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (ret->env->cfg,
336 "datacache-mysql", "HOST"))
338 GNUNET_assert (GNUNET_OK ==
339 GNUNET_CONFIGURATION_get_value_string (ret->env->cfg,
340 "datacache-mysql", "HOST",
344 if (GNUNET_YES == GNUNET_CONFIGURATION_have_value (ret->env->cfg,
345 "datacache-mysql", "PORT"))
347 GNUNET_assert (GNUNET_OK ==
348 GNUNET_CONFIGURATION_get_value_number (ret->env->cfg, "datacache-mysql",
349 "PORT", &mysql_port));
352 GNUNET_assert (mysql_dbname != NULL);
353 mysql_real_connect (ret->dbf, mysql_server, mysql_user, mysql_password,
354 mysql_dbname, (unsigned int) mysql_port, NULL,
355 CLIENT_IGNORE_SIGPIPE);
356 GNUNET_free_non_null (mysql_server);
357 GNUNET_free_non_null (mysql_user);
358 GNUNET_free_non_null (mysql_password);
359 GNUNET_free (mysql_dbname);
360 if (mysql_error (ret->dbf)[0])
362 LOG_MYSQL (GNUNET_ERROR_TYPE_ERROR,
363 "mysql_real_connect", ret);
364 return GNUNET_SYSERR;
371 * Run the given MySQL statement.
373 * @return GNUNET_OK on success, GNUNET_SYSERR on error
376 run_statement (struct Plugin *plugin,
377 const char *statement)
379 if ((NULL == plugin->dbf) && (GNUNET_OK != iopen (plugin)))
380 return GNUNET_SYSERR;
381 mysql_query (plugin->dbf, statement);
382 if (mysql_error (plugin->dbf)[0])
384 LOG_MYSQL (GNUNET_ERROR_TYPE_ERROR,
385 "mysql_query", plugin);
387 return GNUNET_SYSERR;
393 * Create a prepared statement.
395 * @return NULL on error
397 static struct GNUNET_MysqlStatementHandle *
398 prepared_statement_create (struct Plugin *plugin,
399 const char *statement)
401 struct GNUNET_MysqlStatementHandle *ret;
403 ret = GNUNET_malloc (sizeof (struct GNUNET_MysqlStatementHandle));
404 ret->query = GNUNET_strdup (statement);
405 GNUNET_CONTAINER_DLL_insert (plugin->shead,
413 * Prepare a statement for running.
415 * @return GNUNET_OK on success
418 prepare_statement (struct Plugin *plugin,
419 struct GNUNET_MysqlStatementHandle *ret)
421 if (GNUNET_YES == ret->valid)
423 if ((NULL == plugin->dbf) &&
424 (GNUNET_OK != iopen (plugin)))
425 return GNUNET_SYSERR;
426 ret->statement = mysql_stmt_init (plugin->dbf);
427 if (ret->statement == NULL)
430 return GNUNET_SYSERR;
432 if (mysql_stmt_prepare (ret->statement,
434 strlen (ret->query)))
436 LOG_MYSQL (GNUNET_ERROR_TYPE_ERROR,
437 "mysql_stmt_prepare",
439 mysql_stmt_close (ret->statement);
440 ret->statement = NULL;
442 return GNUNET_SYSERR;
444 ret->valid = GNUNET_YES;
451 * Bind the parameters for the given MySQL statement
454 * @param plugin plugin context
455 * @param s statement to bind and run
456 * @param ap arguments for the binding
457 * @return GNUNET_SYSERR on error, GNUNET_OK on success
460 init_params (struct Plugin *plugin,
461 struct GNUNET_MysqlStatementHandle *s,
464 MYSQL_BIND qbind[MAX_PARAM];
467 enum enum_field_types ft;
469 pc = mysql_stmt_param_count (s->statement);
472 /* increase internal constant! */
474 return GNUNET_SYSERR;
476 memset (qbind, 0, sizeof (qbind));
479 while ( (pc > 0) && (-1 != (int) (ft = va_arg (ap, enum enum_field_types))) )
481 qbind[off].buffer_type = ft;
484 case MYSQL_TYPE_FLOAT:
485 qbind[off].buffer = va_arg (ap, float *);
487 case MYSQL_TYPE_LONGLONG:
488 qbind[off].buffer = va_arg (ap, unsigned long long *);
489 qbind[off].is_unsigned = va_arg (ap, int);
491 case MYSQL_TYPE_LONG:
492 qbind[off].buffer = va_arg (ap, unsigned int *);
493 qbind[off].is_unsigned = va_arg (ap, int);
495 case MYSQL_TYPE_VAR_STRING:
496 case MYSQL_TYPE_STRING:
497 case MYSQL_TYPE_BLOB:
498 qbind[off].buffer = va_arg (ap, void *);
499 qbind[off].buffer_length = va_arg (ap, unsigned long);
500 qbind[off].length = va_arg (ap, unsigned long *);
503 /* unsupported type */
505 return GNUNET_SYSERR;
510 if (! ( (pc == 0) && (-1 != (int) ft) && (va_arg (ap, int) == -1)) )
513 return GNUNET_SYSERR;
515 if (mysql_stmt_bind_param (s->statement, qbind))
517 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
518 _("`%s' failed at %s:%d with error: %s\n"),
519 "mysql_stmt_bind_param",
520 __FILE__, __LINE__, mysql_stmt_error (s->statement));
522 return GNUNET_SYSERR;
524 if (mysql_stmt_execute (s->statement))
526 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
527 _("`%s' failed at %s:%d with error: %s\n"),
528 "mysql_stmt_execute",
529 __FILE__, __LINE__, mysql_stmt_error (s->statement));
531 return GNUNET_SYSERR;
537 * Type of a callback that will be called for each
538 * data set returned from MySQL.
540 * @param cls user-defined argument
541 * @param num_values number of elements in values
542 * @param values values returned by MySQL
543 * @return GNUNET_OK to continue iterating, GNUNET_SYSERR to abort
545 typedef int (*GNUNET_MysqlDataProcessor) (void *cls,
546 unsigned int num_values,
547 MYSQL_BIND * values);
551 * Run a prepared SELECT statement.
553 * @param plugin plugin context
554 * @param s handle to SELECT statment
555 * @param result_size number of elements in results array
556 * @param results pointer to already initialized MYSQL_BIND
557 * array (of sufficient size) for passing results
558 * @param processor function to call on each result
559 * @param processor_cls extra argument to processor
560 * @param ... pairs and triplets of "MYSQL_TYPE_XXX" keys and their respective
561 * values (size + buffer-reference for pointers); terminated
563 * @return GNUNET_SYSERR on error, otherwise
564 * the number of successfully affected (or queried) rows
567 prepared_statement_run_select (struct Plugin *plugin,
568 struct GNUNET_MysqlStatementHandle
570 unsigned int result_size,
571 MYSQL_BIND * results,
572 GNUNET_MysqlDataProcessor
573 processor, void *processor_cls,
581 if (GNUNET_OK != prepare_statement (plugin, s))
584 return GNUNET_SYSERR;
586 va_start (ap, processor_cls);
587 if (GNUNET_OK != init_params (plugin, s, ap))
591 return GNUNET_SYSERR;
594 rsize = mysql_stmt_field_count (s->statement);
595 if (rsize > result_size)
598 return GNUNET_SYSERR;
600 if (mysql_stmt_bind_result (s->statement, results))
602 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
603 _("`%s' failed at %s:%d with error: %s\n"),
604 "mysql_stmt_bind_result",
605 __FILE__, __LINE__, mysql_stmt_error (s->statement));
607 return GNUNET_SYSERR;
613 ret = mysql_stmt_fetch (s->statement);
614 if (ret == MYSQL_NO_DATA)
618 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
619 _("`%s' failed at %s:%d with error: %s\n"),
621 __FILE__, __LINE__, mysql_stmt_error (s->statement));
623 return GNUNET_SYSERR;
625 if (processor != NULL)
626 if (GNUNET_OK != processor (processor_cls, rsize, results))
630 mysql_stmt_reset (s->statement);
637 * Run a prepared statement that does NOT produce results.
639 * @param plugin plugin context
640 * @param s handle to SELECT statment
641 * @param ... pairs and triplets of "MYSQL_TYPE_XXX" keys and their respective
642 * values (size + buffer-reference for pointers); terminated
644 * @param insert_id NULL or address where to store the row ID of whatever
645 * was inserted (only for INSERT statements!)
646 * @return GNUNET_SYSERR on error, otherwise
647 * the number of successfully affected rows
650 prepared_statement_run (struct Plugin *plugin,
651 struct GNUNET_MysqlStatementHandle *s,
652 unsigned long long *insert_id, ...)
657 if (GNUNET_OK != prepare_statement (plugin, s))
658 return GNUNET_SYSERR;
659 va_start (ap, insert_id);
660 if (GNUNET_OK != init_params (plugin, s, ap))
663 return GNUNET_SYSERR;
666 affected = mysql_stmt_affected_rows (s->statement);
667 if (NULL != insert_id)
668 *insert_id = (unsigned long long) mysql_stmt_insert_id (s->statement);
669 mysql_stmt_reset (s->statement);
675 * Create temporary table and prepare statements.
677 * @param plugin plugin context
678 * @return GNUNET_OK on success
681 itable (struct Plugin *plugin)
683 #define MRUNS(a) (GNUNET_OK != run_statement (plugin, a) )
684 if (MRUNS ("CREATE TEMPORARY TABLE gn080dstore ("
685 " type INT(11) UNSIGNED NOT NULL DEFAULT 0,"
686 " puttime BIGINT UNSIGNED NOT NULL DEFAULT 0,"
687 " expire BIGINT UNSIGNED NOT NULL DEFAULT 0,"
688 " hash BINARY(64) NOT NULL DEFAULT '',"
689 " vhash BINARY(64) NOT NULL DEFAULT '',"
690 " value BLOB NOT NULL DEFAULT '',"
691 " INDEX hashidx (hash(64),type,expire),"
692 " INDEX allidx (hash(64),vhash(64),type),"
693 " INDEX expireidx (puttime)" ") ENGINE=InnoDB") ||
694 MRUNS ("SET AUTOCOMMIT = 1"))
695 return GNUNET_SYSERR;
697 #define PINIT(a,b) (NULL == (a = prepared_statement_create(plugin, b)))
698 if (PINIT (plugin->select_value, SELECT_VALUE_STMT) ||
699 PINIT (plugin->count_value, COUNT_VALUE_STMT) ||
700 PINIT (plugin->select_old_value, SELECT_OLD_VALUE_STMT) ||
701 PINIT (plugin->delete_value, DELETE_VALUE_STMT) ||
702 PINIT (plugin->insert_value, INSERT_VALUE_STMT) ||
703 PINIT (plugin->update_value, UPDATE_VALUE_STMT))
704 return GNUNET_SYSERR;
711 * Store an item in the datastore.
713 * @param cls closure (our "struct Plugin")
714 * @param key key to store data under
715 * @param size number of bytes in data
716 * @param data data to store
717 * @param type type of the value
718 * @param discard_time when to discard the value in any case
719 * @return 0 on error, number of bytes used otherwise
722 mysql_plugin_put (void *cls,
723 const GNUNET_HashCode * key,
726 enum GNUNET_BLOCK_Type type,
727 struct GNUNET_TIME_Absolute discard_time)
729 struct Plugin *plugin = cls;
730 struct GNUNET_TIME_Absolute now;
731 unsigned long k_length;
732 unsigned long h_length;
733 unsigned long v_length;
734 unsigned long long v_now;
735 unsigned long long v_discard_time;
737 GNUNET_HashCode vhash;
740 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
741 return GNUNET_SYSERR;
742 GNUNET_CRYPTO_hash (data, size, &vhash);
743 now = GNUNET_TIME_absolute_get ();
745 /* first try UPDATE */
746 h_length = sizeof (GNUNET_HashCode);
747 k_length = sizeof (GNUNET_HashCode);
750 v_now = (unsigned long long) now.abs_value;
751 v_discard_time = (unsigned long long) discard_time.abs_value;
753 prepared_statement_run (plugin,
754 plugin->update_value,
764 sizeof (GNUNET_HashCode),
768 sizeof (GNUNET_HashCode),
776 h_length = sizeof (GNUNET_HashCode);
777 k_length = sizeof (GNUNET_HashCode);
780 (ret = prepared_statement_run (plugin,
781 plugin->insert_value,
794 sizeof (GNUNET_HashCode),
798 sizeof (GNUNET_HashCode),
802 (unsigned long) size,
805 if (ret == GNUNET_SYSERR)
807 return GNUNET_SYSERR;
809 return size + OVERHEAD;
814 return_ok (void *cls, unsigned int num_values, MYSQL_BIND * values)
821 * Iterate over the results for a particular key
824 * @param cls closure (our "struct Plugin")
826 * @param type entries of which type are relevant?
827 * @param iter maybe NULL (to just count)
828 * @param iter_cls closure for iter
829 * @return the number of results found
832 mysql_plugin_get (void *cls,
833 const GNUNET_HashCode * key,
834 enum GNUNET_BLOCK_Type type,
835 GNUNET_DATACACHE_Iterator iter,
838 struct Plugin *plugin = cls;
840 unsigned long h_length;
841 unsigned long v_length;
842 unsigned long long v_expire;
843 struct GNUNET_TIME_Absolute now;
844 struct GNUNET_TIME_Absolute expire;
846 unsigned long long total;
847 unsigned long long v_now;
851 char buffer[GNUNET_SERVER_MAX_MESSAGE_SIZE];
853 now = GNUNET_TIME_absolute_get ();
854 h_length = sizeof (GNUNET_HashCode);
855 v_length = sizeof (buffer);
857 memset (rbind, 0, sizeof (rbind));
858 rbind[0].buffer_type = MYSQL_TYPE_LONGLONG;
859 rbind[0].buffer = &total;
860 rbind[0].is_unsigned = GNUNET_YES;
862 v_now = (unsigned long long) now.abs_value;
864 (ret = prepared_statement_run_select (plugin,
882 if (ret == GNUNET_SYSERR)
884 return GNUNET_SYSERR;
886 if ((iter == NULL) || (total == 0))
889 off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, total);
893 memset (rbind, 0, sizeof (rbind));
894 rbind[0].buffer_type = MYSQL_TYPE_BLOB;
895 rbind[0].buffer_length = sizeof (buffer);
896 rbind[0].length = &v_length;
897 rbind[0].buffer = buffer;
898 rbind[1].buffer_type = MYSQL_TYPE_LONGLONG;
899 rbind[1].is_unsigned = 1;
900 rbind[1].buffer = &v_expire;
901 off = (off + 1) % total;
903 (ret = prepared_statement_run_select (plugin,
904 plugin->select_value,
925 if (ret == GNUNET_SYSERR)
927 return GNUNET_SYSERR;
930 expire.abs_value = v_expire;
931 if (GNUNET_OK != iter (iter_cls,
943 * Delete the entry with the lowest expiration value
944 * from the datacache right now.
946 * @param cls closure (our "struct Plugin")
947 * @return GNUNET_OK on success, GNUNET_SYSERR on error
950 mysql_plugin_del (void *cls)
952 struct Plugin *plugin = cls;
956 GNUNET_HashCode v_key;
957 GNUNET_HashCode vhash;
958 unsigned long k_length;
959 unsigned long h_length;
960 unsigned long v_length;
962 char buffer[GNUNET_SERVER_MAX_MESSAGE_SIZE];
964 k_length = sizeof (GNUNET_HashCode);
965 h_length = sizeof (GNUNET_HashCode);
966 v_length = sizeof (buffer);
967 memset (rbind, 0, sizeof (rbind));
968 rbind[0].buffer_type = MYSQL_TYPE_BLOB;
969 rbind[0].buffer_length = sizeof (GNUNET_HashCode);
970 rbind[0].length = &k_length;
971 rbind[0].buffer = &v_key;
972 rbind[1].buffer_type = MYSQL_TYPE_BLOB;
973 rbind[1].buffer_length = sizeof (GNUNET_HashCode);
974 rbind[1].length = &h_length;
975 rbind[1].buffer = &vhash;
976 rbind[2].buffer_type = MYSQL_TYPE_LONG;
977 rbind[2].is_unsigned = 1;
978 rbind[2].buffer = &v_type;
979 rbind[3].buffer_type = MYSQL_TYPE_BLOB;
980 rbind[3].buffer_length = sizeof (buffer);
981 rbind[3].length = &v_length;
982 rbind[3].buffer = buffer;
984 (ret = prepared_statement_run_select (plugin,
985 plugin->select_old_value,
992 (ret = prepared_statement_run (plugin,
993 plugin->delete_value,
997 sizeof (GNUNET_HashCode),
1001 sizeof (GNUNET_HashCode),
1012 if (ret == GNUNET_SYSERR)
1014 return GNUNET_SYSERR;
1016 plugin->env->delete_notify (plugin->env->cls,
1018 v_length + OVERHEAD);
1025 * Entry point for the plugin.
1027 * @param cls closure (the "struct GNUNET_DATACACHE_PluginEnvironmnet")
1028 * @return the plugin's closure (our "struct Plugin")
1031 libgnunet_plugin_datacache_mysql_init (void *cls)
1033 struct GNUNET_DATACACHE_PluginEnvironment *env = cls;
1034 struct GNUNET_DATACACHE_PluginFunctions *api;
1035 struct Plugin *plugin;
1037 plugin = GNUNET_malloc (sizeof (struct Plugin));
1039 plugin->cnffile = get_my_cnf_path (env->cfg);
1043 GNUNET_free_non_null (plugin->cnffile);
1044 GNUNET_free (plugin);
1051 GNUNET_free_non_null (plugin->cnffile);
1052 GNUNET_free (plugin);
1055 api = GNUNET_malloc (sizeof (struct GNUNET_DATACACHE_PluginFunctions));
1057 api->get = &mysql_plugin_get;
1058 api->put = &mysql_plugin_put;
1059 api->del = &mysql_plugin_del;
1060 GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
1061 "mysql", _("MySQL datacache running\n"));
1067 * Exit point from the plugin.
1069 * @param cls closure (our "struct Plugin")
1073 libgnunet_plugin_datacache_mysql_done (void *cls)
1075 struct GNUNET_DATACACHE_PluginFunctions *api = cls;
1076 struct Plugin *plugin = api->cls;
1079 GNUNET_free_non_null (plugin->cnffile);
1080 GNUNET_free (plugin);
1082 mysql_library_end ();
1087 /* end of plugin_datacache_mysql.c */