-/*
- This file is part of GNUnet
- (C) 2009 Christian Grothoff (and other contributing authors)
-
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
- option) any later version.
-
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-*/
+ /*
+ * This file is part of GNUnet
+ * (C) 2009, 2011 Christian Grothoff (and other contributing authors)
+ *
+ * GNUnet is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 3, or (at your
+ * option) any later version.
+ *
+ * GNUnet is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNUnet; see the file COPYING. If not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
/**
* @file datastore/plugin_datastore_sqlite.c
*/
#include "platform.h"
-#include "plugin_datastore.h"
+#include "gnunet_datastore_plugin.h"
+#include <sqlite3.h>
+
+/**
+ * Enable or disable logging debug messages.
+ */
+#define DEBUG_SQLITE GNUNET_NO
+
+/**
+ * We allocate items on the stack at times. To prevent a stack
+ * overflow, we impose a limit on the maximum size for the data per
+ * item. 64k should be enough.
+ */
+#define MAX_ITEM_SIZE 65536
+
+/**
+ * After how many ms "busy" should a DB operation fail for good?
+ * A low value makes sure that we are more responsive to requests
+ * (especially PUTs). A high value guarantees a higher success
+ * rate (SELECTs in iterate can take several seconds despite LIMIT=1).
+ *
+ * The default value of 250ms should ensure that users do not experience
+ * huge latencies while at the same time allowing operations to succeed
+ * with reasonable probability.
+ */
+#define BUSY_TIMEOUT_MS 250
+
+
+/**
+ * Log an error message at log-level 'level' that indicates
+ * a failure of the command 'cmd' on file 'filename'
+ * with the message given by strerror(errno).
+ */
+#define LOG_SQLITE(db, msg, level, cmd) do { GNUNET_log_from (level, "sqlite", _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, sqlite3_errmsg(db->dbh)); if (msg != NULL) GNUNET_asprintf(msg, _("`%s' failed at %s:%u with error: %s"), cmd, __FILE__, __LINE__, sqlite3_errmsg(db->dbh)); } while(0)
+
/**
* Context for all functions in this plugin.
*/
-struct Plugin
+struct Plugin
{
/**
* Our execution environment.
*/
struct GNUNET_DATASTORE_PluginEnvironment *env;
+
+ /**
+ * Database filename.
+ */
+ char *fn;
+
+ /**
+ * Native SQLite database handle.
+ */
+ sqlite3 *dbh;
+
+ /**
+ * Precompiled SQL for deletion.
+ */
+ sqlite3_stmt *delRow;
+
+ /**
+ * Precompiled SQL for update.
+ */
+ sqlite3_stmt *updPrio;
+
+ /**
+ * Get maximum repl value in database.
+ */
+ sqlite3_stmt *maxRepl;
+
+ /**
+ * Precompiled SQL for replication decrement.
+ */
+ sqlite3_stmt *updRepl;
+
+ /**
+ * Precompiled SQL for replication selection.
+ */
+ sqlite3_stmt *selRepl;
+
+ /**
+ * Precompiled SQL for expiration selection.
+ */
+ sqlite3_stmt *selExpi;
+
+ /**
+ * Precompiled SQL for expiration selection.
+ */
+ sqlite3_stmt *selZeroAnon;
+
+ /**
+ * Precompiled SQL for insertion.
+ */
+ sqlite3_stmt *insertContent;
+
+ /**
+ * Should the database be dropped on shutdown?
+ */
+ int drop_on_shutdown;
+
};
/**
- * Get an estimate of how much space the database is
- * currently using.
- * @return number of bytes used on disk
+ * @brief Prepare a SQL statement
+ *
+ * @param dbh handle to the database
+ * @param zSql SQL statement, UTF-8 encoded
+ * @param ppStmt set to the prepared statement
+ * @return 0 on success
+ */
+static int
+sq_prepare (sqlite3 * dbh, const char *zSql, sqlite3_stmt ** ppStmt)
+{
+ char *dummy;
+ int result;
+
+ result =
+ sqlite3_prepare_v2 (dbh, zSql, strlen (zSql), ppStmt,
+ (const char **) &dummy);
+#if DEBUG_SQLITE && 0
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Prepared `%s' / %p: %d\n", zSql, *ppStmt, result);
+#endif
+ return result;
+}
+
+
+/**
+ * Create our database indices.
+ *
+ * @param dbh handle to the database
+ */
+static void
+create_indices (sqlite3 * dbh)
+{
+ /* create indices */
+ if ((SQLITE_OK !=
+ sqlite3_exec (dbh, "CREATE INDEX IF NOT EXISTS idx_hash ON gn090 (hash)",
+ NULL, NULL, NULL)) ||
+ (SQLITE_OK !=
+ sqlite3_exec (dbh,
+ "CREATE INDEX IF NOT EXISTS idx_hash_vhash ON gn090 (hash,vhash)",
+ NULL, NULL, NULL)) ||
+ (SQLITE_OK !=
+ sqlite3_exec (dbh,
+ "CREATE INDEX IF NOT EXISTS idx_expire_repl ON gn090 (expire ASC,repl DESC)",
+ NULL, NULL, NULL)) ||
+ (SQLITE_OK !=
+ sqlite3_exec (dbh,
+ "CREATE INDEX IF NOT EXISTS idx_comb ON gn090 (anonLevel ASC,expire ASC,prio,type,hash)",
+ NULL, NULL, NULL)) ||
+ (SQLITE_OK !=
+ sqlite3_exec (dbh,
+ "CREATE INDEX IF NOT EXISTS idx_anon_type_hash ON gn090 (anonLevel ASC,type,hash)",
+ NULL, NULL, NULL)) ||
+ (SQLITE_OK !=
+ sqlite3_exec (dbh,
+ "CREATE INDEX IF NOT EXISTS idx_expire ON gn090 (expire ASC)",
+ NULL, NULL, NULL)) ||
+ (SQLITE_OK !=
+ sqlite3_exec (dbh,
+ "CREATE INDEX IF NOT EXISTS idx_repl_rvalue ON gn090 (repl,rvalue)",
+ NULL, NULL, NULL)) ||
+ (SQLITE_OK !=
+ sqlite3_exec (dbh,
+ "CREATE INDEX IF NOT EXISTS idx_repl ON gn090 (repl DESC)",
+ NULL, NULL, NULL)))
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "sqlite",
+ "Failed to create indices: %s\n", sqlite3_errmsg (dbh));
+}
+
+
+#if 0
+#define CHECK(a) GNUNET_break(a)
+#define ENULL NULL
+#else
+#define ENULL &e
+#define ENULL_DEFINED 1
+#define CHECK(a) if (! a) { GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "%s\n", e); sqlite3_free(e); }
+#endif
+
+
+/**
+ * Initialize the database connections and associated
+ * data structures (create tables and indices
+ * as needed as well).
+ *
+ * @param cfg our configuration
+ * @param plugin the plugin context (state for this module)
+ * @return GNUNET_OK on success
*/
-static unsigned long long sqlite_plugin_get_size (void *cls)
+static int
+database_setup (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ struct Plugin *plugin)
{
- return 0;
+ sqlite3_stmt *stmt;
+ char *afsdir;
+
+#if ENULL_DEFINED
+ char *e;
+#endif
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (cfg, "datastore-sqlite",
+ "FILENAME", &afsdir))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "sqlite",
+ _
+ ("Option `%s' in section `%s' missing in configuration!\n"),
+ "FILENAME", "datastore-sqlite");
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_OK != GNUNET_DISK_file_test (afsdir))
+ {
+ if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (afsdir))
+ {
+ GNUNET_break (0);
+ GNUNET_free (afsdir);
+ return GNUNET_SYSERR;
+ }
+ /* database is new or got deleted, reset payload to zero! */
+ plugin->env->duc (plugin->env->cls, 0);
+ }
+#ifdef ENABLE_NLS
+ plugin->fn =
+ GNUNET_STRINGS_to_utf8 (afsdir, strlen (afsdir), nl_langinfo (CODESET));
+#else
+ plugin->fn = GNUNET_STRINGS_to_utf8 (afsdir, strlen (afsdir), "UTF-8"); /* good luck */
+#endif
+ GNUNET_free (afsdir);
+
+ /* Open database and precompile statements */
+ if (sqlite3_open (plugin->fn, &plugin->dbh) != SQLITE_OK)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "sqlite",
+ _("Unable to initialize SQLite: %s.\n"),
+ sqlite3_errmsg (plugin->dbh));
+ return GNUNET_SYSERR;
+ }
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA temp_store=MEMORY", NULL, NULL,
+ ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA synchronous=OFF", NULL, NULL,
+ ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA legacy_file_format=OFF", NULL, NULL,
+ ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA auto_vacuum=INCREMENTAL", NULL,
+ NULL, ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA locking_mode=EXCLUSIVE", NULL, NULL,
+ ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA count_changes=OFF", NULL, NULL,
+ ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA page_size=4092", NULL, NULL,
+ ENULL));
+
+ CHECK (SQLITE_OK == sqlite3_busy_timeout (plugin->dbh, BUSY_TIMEOUT_MS));
+
+
+ /* We have to do it here, because otherwise precompiling SQL might fail */
+ CHECK (SQLITE_OK ==
+ sq_prepare (plugin->dbh,
+ "SELECT 1 FROM sqlite_master WHERE tbl_name = 'gn090'",
+ &stmt));
+ if ((sqlite3_step (stmt) == SQLITE_DONE) &&
+ (sqlite3_exec
+ (plugin->dbh,
+ "CREATE TABLE gn090 (" " repl INT4 NOT NULL DEFAULT 0,"
+ " type INT4 NOT NULL DEFAULT 0," " prio INT4 NOT NULL DEFAULT 0,"
+ " anonLevel INT4 NOT NULL DEFAULT 0,"
+ " expire INT8 NOT NULL DEFAULT 0," " rvalue INT8 NOT NULL,"
+ " hash TEXT NOT NULL DEFAULT ''," " vhash TEXT NOT NULL DEFAULT '',"
+ " value BLOB NOT NULL DEFAULT '')", NULL, NULL, NULL) != SQLITE_OK))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_exec");
+ sqlite3_finalize (stmt);
+ return GNUNET_SYSERR;
+ }
+ sqlite3_finalize (stmt);
+ create_indices (plugin->dbh);
+
+ if ((sq_prepare
+ (plugin->dbh,
+ "UPDATE gn090 "
+ "SET prio = prio + ?, expire = MAX(expire,?) WHERE _ROWID_ = ?",
+ &plugin->updPrio) != SQLITE_OK) ||
+ (sq_prepare
+ (plugin->dbh,
+ "UPDATE gn090 " "SET repl = MAX (0, repl - 1) WHERE _ROWID_ = ?",
+ &plugin->updRepl) != SQLITE_OK) ||
+ (sq_prepare
+ (plugin->dbh,
+ "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ "
+ "FROM gn090 "
+#if SQLITE_VERSION_NUMBER >= 3007000
+ "INDEXED BY idx_repl_rvalue "
+#endif
+ "WHERE repl=?2 AND "
+ " (rvalue>=?1 OR "
+ " NOT EXISTS (SELECT 1 FROM gn090 "
+#if SQLITE_VERSION_NUMBER >= 3007000
+ "INDEXED BY idx_repl_rvalue "
+#endif
+ "WHERE repl=?2 AND rvalue>=?1 LIMIT 1) ) "
+ "ORDER BY rvalue ASC LIMIT 1", &plugin->selRepl) != SQLITE_OK) ||
+ (sq_prepare
+ (plugin->dbh, "SELECT MAX(repl) FROM gn090"
+#if SQLITE_VERSION_NUMBER >= 3007000
+ " INDEXED BY idx_repl_rvalue"
+#endif
+ "",
+ &plugin->maxRepl) != SQLITE_OK) ||
+ (sq_prepare
+ (plugin->dbh,
+ "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ "
+ "FROM gn090 "
+#if SQLITE_VERSION_NUMBER >= 3007000
+ "INDEXED BY idx_expire "
+#endif
+ "WHERE NOT EXISTS (SELECT 1 FROM gn090 WHERE expire < ?1 LIMIT 1) OR (expire < ?1) "
+ "ORDER BY expire ASC LIMIT 1", &plugin->selExpi) != SQLITE_OK) ||
+ (sq_prepare
+ (plugin->dbh,
+ "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ "
+ "FROM gn090 "
+#if SQLITE_VERSION_NUMBER >= 3007000
+ "INDEXED BY idx_anon_type_hash "
+#endif
+ "WHERE (anonLevel = 0 AND type=?1) "
+ "ORDER BY hash DESC LIMIT 1 OFFSET ?2",
+ &plugin->selZeroAnon) != SQLITE_OK) ||
+ (sq_prepare
+ (plugin->dbh,
+ "INSERT INTO gn090 (repl, type, prio, anonLevel, expire, rvalue, hash, vhash, value) "
+ "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)",
+ &plugin->insertContent) != SQLITE_OK) ||
+ (sq_prepare
+ (plugin->dbh, "DELETE FROM gn090 WHERE _ROWID_ = ?",
+ &plugin->delRow) != SQLITE_OK))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR, "precompiling");
+ return GNUNET_SYSERR;
+ }
+
+ return GNUNET_OK;
}
+/**
+ * Shutdown database connection and associate data
+ * structures.
+ * @param plugin the plugin context (state for this module)
+ */
+static void
+database_shutdown (struct Plugin *plugin)
+{
+ int result;
+
+#if SQLITE_VERSION_NUMBER >= 3007000
+ sqlite3_stmt *stmt;
+#endif
+
+ if (plugin->delRow != NULL)
+ sqlite3_finalize (plugin->delRow);
+ if (plugin->updPrio != NULL)
+ sqlite3_finalize (plugin->updPrio);
+ if (plugin->updRepl != NULL)
+ sqlite3_finalize (plugin->updRepl);
+ if (plugin->selRepl != NULL)
+ sqlite3_finalize (plugin->selRepl);
+ if (plugin->maxRepl != NULL)
+ sqlite3_finalize (plugin->maxRepl);
+ if (plugin->selExpi != NULL)
+ sqlite3_finalize (plugin->selExpi);
+ if (plugin->selZeroAnon != NULL)
+ sqlite3_finalize (plugin->selZeroAnon);
+ if (plugin->insertContent != NULL)
+ sqlite3_finalize (plugin->insertContent);
+ result = sqlite3_close (plugin->dbh);
+#if SQLITE_VERSION_NUMBER >= 3007000
+ if (result == SQLITE_BUSY)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, "sqlite",
+ _
+ ("Tried to close sqlite without finalizing all prepared statements.\n"));
+ stmt = sqlite3_next_stmt (plugin->dbh, NULL);
+ while (stmt != NULL)
+ {
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Closing statement %p\n", stmt);
+#endif
+ result = sqlite3_finalize (stmt);
+#if DEBUG_SQLITE
+ if (result != SQLITE_OK)
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Failed to close statement %p: %d\n", stmt, result);
+#endif
+ stmt = sqlite3_next_stmt (plugin->dbh, NULL);
+ }
+ result = sqlite3_close (plugin->dbh);
+ }
+#endif
+ if (SQLITE_OK != result)
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite3_close");
+
+ GNUNET_free_non_null (plugin->fn);
+}
+
/**
- * Function invoked on behalf of a "PluginIterator"
- * asking the database plugin to call the iterator
- * with the next item.
+ * Delete the database entry with the given
+ * row identifier.
*
- * @param next_cls whatever argument was given
- * to the PluginIterator as "next_cls".
- * @param end_it set to GNUNET_YES if we
- * should terminate the iteration early
- * (iterator should be still called once more
- * to signal the end of the iteration).
+ * @param plugin the plugin context (state for this module)
+ * @param rid the ID of the row to delete
*/
-static void
-sqlite_next_request (void *next_cls,
- int end_it)
+static int
+delete_by_rowid (struct Plugin *plugin, unsigned long long rid)
{
+ if (SQLITE_OK != sqlite3_bind_int64 (plugin->delRow, 1, rid))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (plugin->delRow))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return GNUNET_SYSERR;
+ }
+ if (SQLITE_DONE != sqlite3_step (plugin->delRow))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ if (SQLITE_OK != sqlite3_reset (plugin->delRow))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return GNUNET_SYSERR;
+ }
+ if (SQLITE_OK != sqlite3_reset (plugin->delRow))
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return GNUNET_OK;
}
* @param type type of the content
* @param priority priority of the content
* @param anonymity anonymity-level for the content
+ * @param replication replication-level for the content
* @param expiration expiration time for the content
* @param msg set to an error message
* @return GNUNET_OK on success
*/
static int
-sqlite_plugin_put (void *cls,
- const GNUNET_HashCode * key,
- uint32_t size,
- const void *data,
- uint32_t type,
- uint32_t priority,
- uint32_t anonymity,
- struct GNUNET_TIME_Absolute expiration,
- char ** msg)
+sqlite_plugin_put (void *cls, const GNUNET_HashCode * key, uint32_t size,
+ const void *data, enum GNUNET_BLOCK_Type type,
+ uint32_t priority, uint32_t anonymity, uint32_t replication,
+ struct GNUNET_TIME_Absolute expiration, char **msg)
{
- *msg = GNUNET_strdup("not implemented");
- return GNUNET_SYSERR;
-}
-
+ struct Plugin *plugin = cls;
+ int n;
+ int ret;
+ sqlite3_stmt *stmt;
+ GNUNET_HashCode vhash;
+ uint64_t rvalue;
-/**
- * Iterate over the results for a particular key
- * in the datastore.
- *
- * @param cls closure
- * @param key maybe NULL (to match all entries)
- * @param vhash hash of the value, maybe NULL (to
- * match all values that have the right key).
- * Note that for DBlocks there is no difference
- * betwen key and vhash, but for other blocks
- * there may be!
- * @param type entries of which type are relevant?
- * Use 0 for any type.
- * @param iter function to call on each matching value;
- * will be called once with a NULL value at the end
- * @param iter_cls closure for iter
- */
-static void
-sqlite_plugin_get (void *cls,
- const GNUNET_HashCode * key,
- const GNUNET_HashCode * vhash,
- uint32_t type,
- PluginIterator iter, void *iter_cls)
-{
- static struct GNUNET_TIME_Absolute zero;
- iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, zero, 0);
+ if (size > MAX_ITEM_SIZE)
+ return GNUNET_SYSERR;
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Storing in database block with type %u/key `%s'/priority %u/expiration in %llu ms (%lld).\n",
+ type, GNUNET_h2s (key), priority,
+ (unsigned long long)
+ GNUNET_TIME_absolute_get_remaining (expiration).rel_value,
+ (long long) expiration.abs_value);
+#endif
+ GNUNET_CRYPTO_hash (data, size, &vhash);
+ stmt = plugin->insertContent;
+ rvalue = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
+ if ((SQLITE_OK != sqlite3_bind_int (stmt, 1, replication)) ||
+ (SQLITE_OK != sqlite3_bind_int (stmt, 2, type)) ||
+ (SQLITE_OK != sqlite3_bind_int (stmt, 3, priority)) ||
+ (SQLITE_OK != sqlite3_bind_int (stmt, 4, anonymity)) ||
+ (SQLITE_OK != sqlite3_bind_int64 (stmt, 5, expiration.abs_value)) ||
+ (SQLITE_OK != sqlite3_bind_int64 (stmt, 6, rvalue)) ||
+ (SQLITE_OK !=
+ sqlite3_bind_blob (stmt, 7, key, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT)) ||
+ (SQLITE_OK !=
+ sqlite3_bind_blob (stmt, 8, &vhash, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT)) ||
+ (SQLITE_OK != sqlite3_bind_blob (stmt, 9, data, size, SQLITE_TRANSIENT)))
+ {
+ LOG_SQLITE (plugin, msg, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return GNUNET_SYSERR;
+ }
+ n = sqlite3_step (stmt);
+ switch (n)
+ {
+ case SQLITE_DONE:
+ plugin->env->duc (plugin->env->cls, size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Stored new entry (%u bytes)\n",
+ size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
+#endif
+ ret = GNUNET_OK;
+ break;
+ case SQLITE_BUSY:
+ GNUNET_break (0);
+ LOG_SQLITE (plugin, msg, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ ret = GNUNET_SYSERR;
+ break;
+ default:
+ LOG_SQLITE (plugin, msg, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ database_shutdown (plugin);
+ database_setup (plugin->env->cfg, plugin);
+ return GNUNET_SYSERR;
+ }
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return ret;
}
* Note that it is possible for multiple values to match this put.
* In that case, all of the respective values are updated.
*
+ * @param cls the plugin context (state for this module)
* @param uid unique identifier of the datum
* @param delta by how much should the priority
* change? If priority + delta < 0 the
* @return GNUNET_OK on success
*/
static int
-sqlite_plugin_update (void *cls,
- unsigned long long uid,
- int delta, struct GNUNET_TIME_Absolute expire,
- char **msg)
+sqlite_plugin_update (void *cls, uint64_t uid, int delta,
+ struct GNUNET_TIME_Absolute expire, char **msg)
{
- *msg = GNUNET_strdup ("not implemented");
- return GNUNET_SYSERR;
+ struct Plugin *plugin = cls;
+ int n;
+
+ if ((SQLITE_OK != sqlite3_bind_int (plugin->updPrio, 1, delta)) ||
+ (SQLITE_OK != sqlite3_bind_int64 (plugin->updPrio, 2, expire.abs_value))
+ || (SQLITE_OK != sqlite3_bind_int64 (plugin->updPrio, 3, uid)))
+ {
+ LOG_SQLITE (plugin, msg, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (plugin->updPrio))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return GNUNET_SYSERR;
+
+ }
+ n = sqlite3_step (plugin->updPrio);
+ if (SQLITE_OK != sqlite3_reset (plugin->updPrio))
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ switch (n)
+ {
+ case SQLITE_DONE:
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite", "Block updated\n");
+#endif
+ return GNUNET_OK;
+ case SQLITE_BUSY:
+ LOG_SQLITE (plugin, msg, GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ return GNUNET_NO;
+ default:
+ LOG_SQLITE (plugin, msg, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ return GNUNET_SYSERR;
+ }
}
/**
- * Select a subset of the items in the datastore and call
- * the given iterator for each of them.
+ * Execute statement that gets a row and call the callback
+ * with the result. Resets the statement afterwards.
*
- * @param type entries of which type should be considered?
- * Use 0 for any type.
- * @param iter function to call on each matching value;
- * will be called once with a NULL value at the end
- * @param iter_cls closure for iter
+ * @param plugin the plugin
+ * @param stmt the statement
+ * @param proc processor to call
+ * @param proc_cls closure for 'proc'
*/
static void
-sqlite_plugin_iter_low_priority (void *cls,
- uint32_t type,
- PluginIterator iter,
- void *iter_cls)
+execute_get (struct Plugin *plugin, sqlite3_stmt * stmt,
+ PluginDatumProcessor proc, void *proc_cls)
{
- static struct GNUNET_TIME_Absolute zero;
- iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, zero, 0);
+ int n;
+ struct GNUNET_TIME_Absolute expiration;
+ unsigned long long rowid;
+ unsigned int size;
+ int ret;
+
+ n = sqlite3_step (stmt);
+ switch (n)
+ {
+ case SQLITE_ROW:
+ size = sqlite3_column_bytes (stmt, 5);
+ rowid = sqlite3_column_int64 (stmt, 6);
+ if (sqlite3_column_bytes (stmt, 4) != sizeof (GNUNET_HashCode))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, "sqlite",
+ _
+ ("Invalid data in database. Trying to fix (by deletion).\n"));
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ if (GNUNET_OK == delete_by_rowid (plugin, rowid))
+ plugin->env->duc (plugin->env->cls,
+ -(size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
+ break;
+ }
+ expiration.abs_value = sqlite3_column_int64 (stmt, 3);
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Found reply in database with expiration %llu\n",
+ (unsigned long long) expiration.abs_value);
+#endif
+ ret = proc (proc_cls, sqlite3_column_blob (stmt, 4) /* key */ ,
+ size, sqlite3_column_blob (stmt, 5) /* data */ ,
+ sqlite3_column_int (stmt, 0) /* type */ ,
+ sqlite3_column_int (stmt, 1) /* priority */ ,
+ sqlite3_column_int (stmt, 2) /* anonymity */ ,
+ expiration, rowid);
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ if ((GNUNET_NO == ret) && (GNUNET_OK == delete_by_rowid (plugin, rowid)))
+ plugin->env->duc (plugin->env->cls,
+ -(size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
+ return;
+ case SQLITE_DONE:
+ /* database must be empty */
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ break;
+ case SQLITE_BUSY:
+ case SQLITE_ERROR:
+ case SQLITE_MISUSE:
+ default:
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ GNUNET_break (0);
+ database_shutdown (plugin);
+ database_setup (plugin->env->cfg, plugin);
+ break;
+ }
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
}
+
/**
* Select a subset of the items in the datastore and call
- * the given iterator for each of them.
+ * the given processor for the item.
*
+ * @param cls our plugin context
+ * @param offset offset of the result (modulo num-results);
+ * specific ordering does not matter for the offset
* @param type entries of which type should be considered?
* Use 0 for any type.
- * @param iter function to call on each matching value;
+ * @param proc function to call on each matching value;
* will be called once with a NULL value at the end
- * @param iter_cls closure for iter
+ * @param proc_cls closure for proc
*/
static void
-sqlite_plugin_iter_zero_anonymity (void *cls,
- uint32_t type,
- PluginIterator iter,
- void *iter_cls)
+sqlite_plugin_get_zero_anonymity (void *cls, uint64_t offset,
+ enum GNUNET_BLOCK_Type type,
+ PluginDatumProcessor proc, void *proc_cls)
{
- static struct GNUNET_TIME_Absolute zero;
- iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, zero, 0);
+ struct Plugin *plugin = cls;
+ sqlite3_stmt *stmt;
+
+ GNUNET_assert (type != GNUNET_BLOCK_TYPE_ANY);
+ stmt = plugin->selZeroAnon;
+ if ((SQLITE_OK != sqlite3_bind_int (stmt, 1, type)) ||
+ (SQLITE_OK != sqlite3_bind_int64 (stmt, 2, offset)))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ execute_get (plugin, stmt, proc, proc_cls);
}
/**
- * Select a subset of the items in the datastore and call
- * the given iterator for each of them.
+ * Get results for a particular key in the datastore.
*
- * @param type entries of which type should be considered?
- * Use 0 for any type.
- * @param iter function to call on each matching value;
+ * @param cls closure
+ * @param offset offset (mod count).
+ * @param key key to match, never NULL
+ * @param vhash hash of the value, maybe NULL (to
+ * match all values that have the right key).
+ * Note that for DBlocks there is no difference
+ * betwen key and vhash, but for other blocks
+ * there may be!
+ * @param type entries of which type are relevant?
+ * Use 0 for any type.
+ * @param proc function to call on each matching value;
* will be called once with a NULL value at the end
- * @param iter_cls closure for iter
+ * @param proc_cls closure for proc
*/
static void
-sqlite_plugin_iter_ascending_expiration (void *cls,
- uint32_t type,
- PluginIterator iter,
- void *iter_cls)
+sqlite_plugin_get_key (void *cls, uint64_t offset, const GNUNET_HashCode * key,
+ const GNUNET_HashCode * vhash,
+ enum GNUNET_BLOCK_Type type, PluginDatumProcessor proc,
+ void *proc_cls)
{
- static struct GNUNET_TIME_Absolute zero;
- iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, zero, 0);
+ struct Plugin *plugin = cls;
+ int ret;
+ int total;
+ int limit_off;
+ unsigned int sqoff;
+ sqlite3_stmt *stmt;
+ char scratch[256];
+
+ GNUNET_assert (proc != NULL);
+ GNUNET_assert (key != NULL);
+ GNUNET_snprintf (scratch, sizeof (scratch),
+ "SELECT count(*) FROM gn090 WHERE hash=?%s%s",
+ vhash == NULL ? "" : " AND vhash=?",
+ type == 0 ? "" : " AND type=?");
+ if (sq_prepare (plugin->dbh, scratch, &stmt) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite_prepare");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ sqoff = 1;
+ ret =
+ sqlite3_bind_blob (stmt, sqoff++, key, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT);
+ if ((vhash != NULL) && (ret == SQLITE_OK))
+ ret =
+ sqlite3_bind_blob (stmt, sqoff++, vhash, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT);
+ if ((type != 0) && (ret == SQLITE_OK))
+ ret = sqlite3_bind_int (stmt, sqoff++, type);
+ if (SQLITE_OK != ret)
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR, "sqlite_bind");
+ sqlite3_finalize (stmt);
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ ret = sqlite3_step (stmt);
+ if (ret != SQLITE_ROW)
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite_step");
+ sqlite3_finalize (stmt);
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ total = sqlite3_column_int (stmt, 0);
+ sqlite3_finalize (stmt);
+ if (0 == total)
+ {
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ limit_off = (int) (offset % total);
+ if (limit_off < 0)
+ limit_off += total;
+ GNUNET_snprintf (scratch, sizeof (scratch),
+ "SELECT type, prio, anonLevel, expire, hash, value, _ROWID_ "
+ "FROM gn090 WHERE hash=?%s%s "
+ "ORDER BY _ROWID_ ASC LIMIT 1 OFFSET ?",
+ vhash == NULL ? "" : " AND vhash=?",
+ type == 0 ? "" : " AND type=?");
+ if (sq_prepare (plugin->dbh, scratch, &stmt) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite_prepare");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ sqoff = 1;
+ ret =
+ sqlite3_bind_blob (stmt, sqoff++, key, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT);
+ if ((vhash != NULL) && (ret == SQLITE_OK))
+ ret =
+ sqlite3_bind_blob (stmt, sqoff++, vhash, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT);
+ if ((type != 0) && (ret == SQLITE_OK))
+ ret = sqlite3_bind_int (stmt, sqoff++, type);
+ if (ret == SQLITE_OK)
+ ret = sqlite3_bind_int64 (stmt, sqoff++, limit_off);
+ if (ret != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite_bind");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ execute_get (plugin, stmt, proc, proc_cls);
+ sqlite3_finalize (stmt);
}
/**
- * Select a subset of the items in the datastore and call
- * the given iterator for each of them.
+ * Context for 'repl_proc' function.
+ */
+struct ReplCtx
+{
+
+ /**
+ * Function to call for the result (or the NULL).
+ */
+ PluginDatumProcessor proc;
+
+ /**
+ * Closure for proc.
+ */
+ void *proc_cls;
+
+ /**
+ * UID to use.
+ */
+ uint64_t uid;
+
+ /**
+ * Yes if UID was set.
+ */
+ int have_uid;
+};
+
+
+/**
+ * Wrapper for the processor for 'sqlite_plugin_replication_get'.
+ * Decrements the replication counter and calls the original
+ * processor.
*
- * @param type entries of which type should be considered?
- * Use 0 for any type.
- * @param iter function to call on each matching value;
- * will be called once with a NULL value at the end
- * @param iter_cls closure for iter
+ * @param cls closure
+ * @param key key for the content
+ * @param size number of bytes in data
+ * @param data content stored
+ * @param type type of the content
+ * @param priority priority of the content
+ * @param anonymity anonymity-level for the content
+ * @param expiration expiration time for the content
+ * @param uid unique identifier for the datum;
+ * maybe 0 if no unique identifier is available
+ *
+ * @return GNUNET_OK for normal return,
+ * GNUNET_NO to delete the item
+ */
+static int
+repl_proc (void *cls, const GNUNET_HashCode * key, uint32_t size,
+ const void *data, enum GNUNET_BLOCK_Type type, uint32_t priority,
+ uint32_t anonymity, struct GNUNET_TIME_Absolute expiration,
+ uint64_t uid)
+{
+ struct ReplCtx *rc = cls;
+ int ret;
+
+ ret =
+ rc->proc (rc->proc_cls, key, size, data, type, priority, anonymity,
+ expiration, uid);
+ if (key != NULL)
+ {
+ rc->uid = uid;
+ rc->have_uid = GNUNET_YES;
+ }
+ return ret;
+}
+
+
+/**
+ * Get a random item for replication. Returns a single random item
+ * from those with the highest replication counters. The item's
+ * replication counter is decremented by one IF it was positive before.
+ * Call 'proc' with all values ZERO or NULL if the datastore is empty.
+ *
+ * @param cls closure
+ * @param proc function to call the value (once only).
+ * @param proc_cls closure for proc
*/
static void
-sqlite_plugin_iter_migration_order (void *cls,
- uint32_t type,
- PluginIterator iter,
- void *iter_cls)
+sqlite_plugin_get_replication (void *cls, PluginDatumProcessor proc,
+ void *proc_cls)
{
- static struct GNUNET_TIME_Absolute zero;
- iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, zero, 0);
+ struct Plugin *plugin = cls;
+ struct ReplCtx rc;
+ uint64_t rvalue;
+ uint32_t repl;
+ sqlite3_stmt *stmt;
+
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Getting random block based on replication order.\n");
+#endif
+ rc.have_uid = GNUNET_NO;
+ rc.proc = proc;
+ rc.proc_cls = proc_cls;
+ stmt = plugin->maxRepl;
+ if (SQLITE_ROW != sqlite3_step (stmt))
+ {
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ /* DB empty */
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ repl = sqlite3_column_int (stmt, 0);
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ stmt = plugin->selRepl;
+ rvalue = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
+ if (SQLITE_OK != sqlite3_bind_int64 (stmt, 1, rvalue))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ if (SQLITE_OK != sqlite3_bind_int (stmt, 2, repl))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ execute_get (plugin, stmt, &repl_proc, &rc);
+ if (GNUNET_YES == rc.have_uid)
+ {
+ if (SQLITE_OK != sqlite3_bind_int64 (plugin->updRepl, 1, rc.uid))
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (plugin->updRepl))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return;
+ }
+ if (SQLITE_DONE != sqlite3_step (plugin->updRepl))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ if (SQLITE_OK != sqlite3_reset (plugin->updRepl))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ }
}
/**
- * Select a subset of the items in the datastore and call
- * the given iterator for each of them.
+ * Get a random item that has expired or has low priority.
+ * Call 'proc' with all values ZERO or NULL if the datastore is empty.
*
- * @param type entries of which type should be considered?
- * Use 0 for any type.
- * @param iter function to call on each matching value;
- * will be called once with a NULL value at the end
- * @param iter_cls closure for iter
+ * @param cls closure
+ * @param proc function to call the value (once only).
+ * @param proc_cls closure for proc
*/
static void
-sqlite_plugin_iter_all_now (void *cls,
- uint32_t type,
- PluginIterator iter,
- void *iter_cls)
+sqlite_plugin_get_expiration (void *cls, PluginDatumProcessor proc,
+ void *proc_cls)
{
- static struct GNUNET_TIME_Absolute zero;
- iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, zero, 0);
+ struct Plugin *plugin = cls;
+ sqlite3_stmt *stmt;
+ struct GNUNET_TIME_Absolute now;
+
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Getting random block based on expiration and priority order.\n");
+#endif
+ now = GNUNET_TIME_absolute_get ();
+ stmt = plugin->selExpi;
+ if (SQLITE_OK != sqlite3_bind_int64 (stmt, 1, now.abs_value))
+ {
+ LOG_SQLITE (plugin, NULL, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ proc (proc_cls, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ execute_get (plugin, stmt, proc, proc_cls);
}
/**
* Drop database.
+ *
+ * @param cls our plugin context
*/
-static void
+static void
sqlite_plugin_drop (void *cls)
{
+ struct Plugin *plugin = cls;
+
+ plugin->drop_on_shutdown = GNUNET_YES;
+}
+
+
+/**
+ * Get an estimate of how much space the database is
+ * currently using.
+ *
+ * @param cls the 'struct Plugin'
+ * @return the size of the database on disk (estimate)
+ */
+static unsigned long long
+sqlite_plugin_estimate_size (void *cls)
+{
+ struct Plugin *plugin = cls;
+ sqlite3_stmt *stmt;
+ uint64_t pages;
+ uint64_t page_size;
+
+#if ENULL_DEFINED
+ char *e;
+#endif
+
+ if (SQLITE_VERSION_NUMBER < 3006000)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING, "datastore-sqlite",
+ _
+ ("sqlite version to old to determine size, assuming zero\n"));
+ return 0;
+ }
+ CHECK (SQLITE_OK == sqlite3_exec (plugin->dbh, "VACUUM", NULL, NULL, ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh, "PRAGMA auto_vacuum=INCREMENTAL", NULL,
+ NULL, ENULL));
+ CHECK (SQLITE_OK == sq_prepare (plugin->dbh, "PRAGMA page_count", &stmt));
+ if (SQLITE_ROW == sqlite3_step (stmt))
+ pages = sqlite3_column_int64 (stmt, 0);
+ else
+ pages = 0;
+ sqlite3_finalize (stmt);
+ CHECK (SQLITE_OK == sq_prepare (plugin->dbh, "PRAGMA page_size", &stmt));
+ CHECK (SQLITE_ROW == sqlite3_step (stmt));
+ page_size = sqlite3_column_int64 (stmt, 0);
+ sqlite3_finalize (stmt);
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _
+ ("Using sqlite page utilization to estimate payload (%llu pages of size %llu bytes)\n"),
+ (unsigned long long) pages, (unsigned long long) page_size);
+ return pages * page_size;
}
/**
* Entry point for the plugin.
+ *
+ * @param cls the "struct GNUNET_DATASTORE_PluginEnvironment*"
+ * @return NULL on error, othrewise the plugin context
*/
void *
libgnunet_plugin_datastore_sqlite_init (void *cls)
{
+ static struct Plugin plugin;
struct GNUNET_DATASTORE_PluginEnvironment *env = cls;
struct GNUNET_DATASTORE_PluginFunctions *api;
- struct Plugin *plugin;
- plugin = GNUNET_malloc (sizeof (struct Plugin));
- plugin->env = env;
+ if (plugin.env != NULL)
+ return NULL; /* can only initialize once! */
+ memset (&plugin, 0, sizeof (struct Plugin));
+ plugin.env = env;
+ if (GNUNET_OK != database_setup (env->cfg, &plugin))
+ {
+ database_shutdown (&plugin);
+ return NULL;
+ }
api = GNUNET_malloc (sizeof (struct GNUNET_DATASTORE_PluginFunctions));
- api->cls = plugin;
- api->get_size = &sqlite_plugin_get_size;
+ api->cls = &plugin;
+ api->estimate_size = &sqlite_plugin_estimate_size;
api->put = &sqlite_plugin_put;
- api->next_request = &sqlite_next_request;
- api->get = &sqlite_plugin_get;
api->update = &sqlite_plugin_update;
- api->iter_low_priority = &sqlite_plugin_iter_low_priority;
- api->iter_zero_anonymity = &sqlite_plugin_iter_zero_anonymity;
- api->iter_ascending_expiration = &sqlite_plugin_iter_ascending_expiration;
- api->iter_migration_order = &sqlite_plugin_iter_migration_order;
- api->iter_all_now = &sqlite_plugin_iter_all_now;
+ api->get_key = &sqlite_plugin_get_key;
+ api->get_replication = &sqlite_plugin_get_replication;
+ api->get_expiration = &sqlite_plugin_get_expiration;
+ api->get_zero_anonymity = &sqlite_plugin_get_zero_anonymity;
api->drop = &sqlite_plugin_drop;
- GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
- "sqlite", _("Sqlite database running\n"));
+ GNUNET_log_from (GNUNET_ERROR_TYPE_INFO, "sqlite",
+ _("Sqlite database running\n"));
return api;
}
/**
* Exit point from the plugin.
+ *
+ * @param cls the plugin context (as returned by "init")
+ * @return always NULL
*/
void *
libgnunet_plugin_datastore_sqlite_done (void *cls)
{
+ char *fn;
struct GNUNET_DATASTORE_PluginFunctions *api = cls;
struct Plugin *plugin = api->cls;
- GNUNET_free (plugin);
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "sqlite plugin is done\n");
+#endif
+
+ fn = NULL;
+ if (plugin->drop_on_shutdown)
+ fn = GNUNET_strdup (plugin->fn);
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "Shutting down database\n");
+#endif
+ database_shutdown (plugin);
+ plugin->env = NULL;
GNUNET_free (api);
+ if (fn != NULL)
+ {
+ if (0 != UNLINK (fn))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink", fn);
+ GNUNET_free (fn);
+ }
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
+ "sqlite plugin is finished\n");
+#endif
return NULL;
}
projects / oweals / gnunet.git / blobdiff