-/*
+ /*
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
+ 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
*/
#include "platform.h"
-#include "plugin_datastore.h"
+#include "gnunet_datastore_plugin.h"
+#include <sqlite3.h>
+
+#define DEBUG_SQLITE GNUNET_YES
+
+
+/**
+ * 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)
+
+#define SELECT_IT_LOW_PRIORITY_1 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (prio = ? AND hash > ?) "\
+ "ORDER BY hash ASC LIMIT 1"
+
+#define SELECT_IT_LOW_PRIORITY_2 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (prio > ?) "\
+ "ORDER BY prio ASC, hash ASC LIMIT 1"
+
+#define SELECT_IT_NON_ANONYMOUS_1 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (prio = ? AND hash < ? AND anonLevel = 0 AND expire > %llu) "\
+ " ORDER BY hash DESC LIMIT 1"
+
+#define SELECT_IT_NON_ANONYMOUS_2 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (prio < ? AND anonLevel = 0 AND expire > %llu)"\
+ " ORDER BY prio DESC, hash DESC LIMIT 1"
+
+#define SELECT_IT_EXPIRATION_TIME_1 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (expire = ? AND hash > ?) "\
+ " ORDER BY hash ASC LIMIT 1"
+
+#define SELECT_IT_EXPIRATION_TIME_2 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (expire > ?) "\
+ " ORDER BY expire ASC, hash ASC LIMIT 1"
+
+#define SELECT_IT_MIGRATION_ORDER_1 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (expire = ? AND hash < ?) "\
+ " ORDER BY hash DESC LIMIT 1"
+
+#define SELECT_IT_MIGRATION_ORDER_2 \
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080 WHERE (expire < ? AND expire > %llu) "\
+ " ORDER BY expire DESC, hash DESC LIMIT 1"
+
+/**
+ * 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
+
/**
* Our execution environment.
*/
struct GNUNET_DATASTORE_PluginEnvironment *env;
+
+ /**
+ * Database filename.
+ */
+ char *fn;
+
+ /**
+ * Native SQLite database handle.
+ */
+ sqlite3 *dbh;
+
+ /**
+ * Precompiled SQL for update.
+ */
+ sqlite3_stmt *updPrio;
+
+ /**
+ * Precompiled SQL for insertion.
+ */
+ sqlite3_stmt *insertContent;
+
+ /**
+ * Closure of the 'next_task' (must be freed if 'next_task' is cancelled).
+ */
+ struct NextContext *next_task_nc;
+
+ /**
+ * Pending task with scheduler for running the next request.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier next_task;
+
+ /**
+ * Should the database be dropped on shutdown?
+ */
+ int drop_on_shutdown;
+
+};
+
+
+/**
+ * @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;
+ return sqlite3_prepare_v2 (dbh,
+ zSql,
+ strlen (zSql), ppStmt, (const char **) &dummy);
+}
+
+
+/**
+ * Create our database indices.
+ *
+ * @param dbh handle to the database
+ */
+static void
+create_indices (sqlite3 * dbh)
+{
+ /* create indices */
+ sqlite3_exec (dbh,
+ "CREATE INDEX idx_hash ON gn080 (hash)", NULL, NULL, NULL);
+ sqlite3_exec (dbh,
+ "CREATE INDEX idx_hash_vhash ON gn080 (hash,vhash)", NULL,
+ NULL, NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_prio ON gn080 (prio)", NULL, NULL,
+ NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_expire ON gn080 (expire)", NULL, NULL,
+ NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_comb3 ON gn080 (prio,anonLevel)", NULL,
+ NULL, NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_comb4 ON gn080 (prio,hash,anonLevel)",
+ NULL, NULL, NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_comb7 ON gn080 (expire,hash)", NULL,
+ NULL, NULL);
+}
+
+
+
+#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 int
+database_setup (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ struct Plugin *plugin)
+{
+ 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 auto_vacuum=INCREMENTAL", 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 = 'gn080'",
+ &stmt));
+ if ( (sqlite3_step (stmt) == SQLITE_DONE) &&
+ (sqlite3_exec (plugin->dbh,
+ "CREATE TABLE gn080 ("
+ " size 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,"
+ " 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);
+
+ CHECK (SQLITE_OK ==
+ sq_prepare (plugin->dbh,
+ "SELECT 1 FROM sqlite_master WHERE tbl_name = 'gn071'",
+ &stmt));
+ if ( (sqlite3_step (stmt) == SQLITE_DONE) &&
+ (sqlite3_exec (plugin->dbh,
+ "CREATE TABLE gn071 ("
+ " key TEXT NOT NULL DEFAULT '',"
+ " value INTEGER NOT NULL DEFAULT 0)", NULL, NULL,
+ NULL) != SQLITE_OK) )
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR, "sqlite3_exec");
+ sqlite3_finalize (stmt);
+ return GNUNET_SYSERR;
+ }
+ sqlite3_finalize (stmt);
+
+ if ((sq_prepare (plugin->dbh,
+ "UPDATE gn080 SET prio = prio + ?, expire = MAX(expire,?) WHERE "
+ "_ROWID_ = ?",
+ &plugin->updPrio) != SQLITE_OK) ||
+ (sq_prepare (plugin->dbh,
+ "INSERT INTO gn080 (size, type, prio, "
+ "anonLevel, expire, hash, vhash, value) VALUES "
+ "(?, ?, ?, ?, ?, ?, ?, ?)",
+ &plugin->insertContent) != 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)
+{
+ if (plugin->updPrio != NULL)
+ sqlite3_finalize (plugin->updPrio);
+ if (plugin->insertContent != NULL)
+ sqlite3_finalize (plugin->insertContent);
+ sqlite3_close (plugin->dbh);
+ GNUNET_free_non_null (plugin->fn);
+}
+
+
+/**
+ * Delete the database entry with the given
+ * row identifier.
+ *
+ * @param plugin the plugin context (state for this module)
+ * @param rid the ID of the row to delete
+ */
+static int
+delete_by_rowid (struct Plugin* plugin,
+ unsigned long long rid)
+{
+ sqlite3_stmt *stmt;
+
+ if (sq_prepare (plugin->dbh,
+ "DELETE FROM gn080 WHERE _ROWID_ = ?", &stmt) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sq_prepare");
+ return GNUNET_SYSERR;
+ }
+ sqlite3_bind_int64 (stmt, 1, rid);
+ if (SQLITE_DONE != sqlite3_step (stmt))
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_step");
+ sqlite3_finalize (stmt);
+ return GNUNET_SYSERR;
+ }
+ sqlite3_finalize (stmt);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Context for the universal iterator.
+ */
+struct NextContext;
+
+/**
+ * Type of a function that will prepare
+ * the next iteration.
+ *
+ * @param cls closure
+ * @param nc the next context; NULL for the last
+ * call which gives the callback a chance to
+ * clean up the closure
+ * @return GNUNET_OK on success, GNUNET_NO if there are
+ * no more values, GNUNET_SYSERR on error
+ */
+typedef int (*PrepareFunction)(void *cls,
+ struct NextContext *nc);
+
+
+/**
+ * Context we keep for the "next request" callback.
+ */
+struct NextContext
+{
+ /**
+ * Internal state.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * Function to call on the next value.
+ */
+ PluginIterator iter;
+
+ /**
+ * Closure for iter.
+ */
+ void *iter_cls;
+
+ /**
+ * Function to call to prepare the next
+ * iteration.
+ */
+ PrepareFunction prep;
+
+ /**
+ * Closure for prep.
+ */
+ void *prep_cls;
+
+ /**
+ * Statement that the iterator will get the data
+ * from (updated or set by prep).
+ */
+ sqlite3_stmt *stmt;
+
+ /**
+ * Row ID of the last result.
+ */
+ unsigned long long last_rowid;
+
+ /**
+ * Key of the last result.
+ */
+ GNUNET_HashCode lastKey;
+
+ /**
+ * Expiration time of the last value visited.
+ */
+ struct GNUNET_TIME_Absolute lastExpiration;
+
+ /**
+ * Priority of the last value visited.
+ */
+ unsigned int lastPriority;
+
+ /**
+ * Number of results processed so far.
+ */
+ unsigned int count;
+
+ /**
+ * Set to GNUNET_YES if we must stop now.
+ */
+ int end_it;
};
/**
- * Get an estimate of how much space the database is
- * currently using.
- * @return number of bytes used on disk
+ * Continuation of "sqlite_next_request".
+ *
+ * @param cls the next context
+ * @param tc the task context (unused)
*/
-static unsigned long long sqlite_plugin_get_size (void *cls)
+static void
+sqlite_next_request_cont (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- return 0;
+ struct NextContext * nc = cls;
+ struct Plugin *plugin;
+ unsigned long long rowid;
+ sqlite3_stmt *stmtd;
+ int ret;
+ unsigned int type;
+ unsigned int size;
+ unsigned int priority;
+ unsigned int anonymity;
+ struct GNUNET_TIME_Absolute expiration;
+ const GNUNET_HashCode *key;
+ const void *data;
+
+ plugin = nc->plugin;
+ plugin->next_task = GNUNET_SCHEDULER_NO_TASK;
+ plugin->next_task_nc = NULL;
+ if ( (GNUNET_YES == nc->end_it) ||
+ (GNUNET_OK != (nc->prep(nc->prep_cls,
+ nc))) )
+ {
+ END:
+ nc->iter (nc->iter_cls,
+ NULL, NULL, 0, NULL, 0, 0, 0,
+ GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ nc->prep (nc->prep_cls, NULL);
+ GNUNET_free (nc);
+ return;
+ }
+
+ rowid = sqlite3_column_int64 (nc->stmt, 7);
+ nc->last_rowid = rowid;
+ type = sqlite3_column_int (nc->stmt, 1);
+ size = sqlite3_column_bytes (nc->stmt, 6);
+ if (sqlite3_column_bytes (nc->stmt, 5) != 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 (nc->stmt))
+ LOG_SQLITE (nc->plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
+ if (sq_prepare
+ (nc->plugin->dbh,
+ "DELETE FROM gn080 WHERE NOT LENGTH(hash) = ?",
+ &stmtd) != SQLITE_OK)
+ {
+ LOG_SQLITE (nc->plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
+ goto END;
+ }
+
+ if (SQLITE_OK != sqlite3_bind_int (stmtd, 1, sizeof (GNUNET_HashCode)))
+ LOG_SQLITE (nc->plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_bind_int");
+ if (SQLITE_DONE != sqlite3_step (stmtd))
+ LOG_SQLITE (nc->plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_step");
+ if (SQLITE_OK != sqlite3_finalize (stmtd))
+ LOG_SQLITE (nc->plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_finalize");
+ goto END;
+ }
+
+ priority = sqlite3_column_int (nc->stmt, 2);
+ anonymity = sqlite3_column_int (nc->stmt, 3);
+ expiration.abs_value = sqlite3_column_int64 (nc->stmt, 4);
+ key = sqlite3_column_blob (nc->stmt, 5);
+ nc->lastPriority = priority;
+ nc->lastExpiration = expiration;
+ memcpy (&nc->lastKey, key, sizeof(GNUNET_HashCode));
+ data = sqlite3_column_blob (nc->stmt, 6);
+ nc->count++;
+ ret = nc->iter (nc->iter_cls,
+ nc,
+ key,
+ size,
+ data,
+ type,
+ priority,
+ anonymity,
+ expiration,
+ rowid);
+ if (ret == GNUNET_SYSERR)
+ {
+ nc->end_it = GNUNET_YES;
+ return;
+ }
+#if DEBUG_SQLITE
+ if (ret == GNUNET_NO)
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "sqlite",
+ "Asked to remove entry %llu (%u bytes)\n",
+ (unsigned long long) rowid,
+ size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
+#endif
+ if ( (ret == GNUNET_NO) &&
+ (GNUNET_OK == delete_by_rowid (plugin, rowid)) )
+ {
+ plugin->env->duc (plugin->env->cls,
+ - (size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "sqlite",
+ "Removed entry %llu (%u bytes)\n",
+ (unsigned long long) rowid,
+ size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
+#endif
+ }
}
+/**
+ * Function invoked on behalf of a "PluginIterator"
+ * asking the database plugin to call the iterator
+ * with the next item.
+ *
+ * @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).
+ */
+static void
+sqlite_next_request (void *next_cls,
+ int end_it)
+{
+ struct NextContext * nc= next_cls;
+
+ if (GNUNET_YES == end_it)
+ nc->end_it = GNUNET_YES;
+ nc->plugin->next_task_nc = nc;
+ nc->plugin->next_task = GNUNET_SCHEDULER_add_now (&sqlite_next_request_cont,
+ nc);
+}
+
+
+
/**
* Store an item in the datastore.
*
* @param priority priority of the content
* @param anonymity anonymity-level for the content
* @param expiration expiration time for the content
+ * @param msg set to an error message
+ * @return GNUNET_OK on success
*/
-static void
+static int
sqlite_plugin_put (void *cls,
const GNUNET_HashCode * key,
uint32_t size,
const void *data,
- uint32_t type,
+ enum GNUNET_BLOCK_Type type,
uint32_t priority,
uint32_t anonymity,
- struct GNUNET_TIME_Absolute expiration)
+ struct GNUNET_TIME_Absolute expiration,
+ char ** msg)
{
-}
+ struct Plugin *plugin = cls;
+ int n;
+ sqlite3_stmt *stmt;
+ GNUNET_HashCode vhash;
-
-/**
- * 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,
- GNUNET_DATASTORE_Iterator iter, void *iter_cls)
-{
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "sqlite",
+ "Storing in database block with type %u/key `%s'/priority %u/expiration %llu (%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;
+ if ((SQLITE_OK != sqlite3_bind_int (stmt, 1, size)) ||
+ (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_blob (stmt, 6, key, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT)) ||
+ (SQLITE_OK !=
+ sqlite3_bind_blob (stmt, 7, &vhash, sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT))
+ || (SQLITE_OK !=
+ sqlite3_bind_blob (stmt, 8, 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);
+ if (n != SQLITE_DONE)
+ {
+ if (n == SQLITE_BUSY)
+ {
+ LOG_SQLITE (plugin, msg,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, "sqlite3_step");
+ sqlite3_reset (stmt);
+ GNUNET_break (0);
+ return GNUNET_NO;
+ }
+ LOG_SQLITE (plugin, msg,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, "sqlite3_step");
+ sqlite3_reset (stmt);
+ 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");
+ 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
+ return GNUNET_OK;
}
* 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
* @param expire new expiration time should be the
* MAX of any existing expiration time and
* this value
+ * @param msg set to an error message
+ * @return GNUNET_OK on success
*/
-static void
+static int
sqlite_plugin_update (void *cls,
- unsigned long long uid,
- int delta, struct GNUNET_TIME_Absolute expire)
+ uint64_t uid,
+ int delta, struct GNUNET_TIME_Absolute expire,
+ char **msg)
+{
+ struct Plugin *plugin = cls;
+ int n;
+
+ sqlite3_bind_int (plugin->updPrio, 1, delta);
+ sqlite3_bind_int64 (plugin->updPrio, 2, expire.abs_value);
+ sqlite3_bind_int64 (plugin->updPrio, 3, uid);
+ n = sqlite3_step (plugin->updPrio);
+ if (n != SQLITE_DONE)
+ LOG_SQLITE (plugin, msg,
+ GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+#if DEBUG_SQLITE
+ else
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "sqlite",
+ "Block updated\n");
+#endif
+ sqlite3_reset (plugin->updPrio);
+
+ if (n == SQLITE_BUSY)
+ return GNUNET_NO;
+ return n == SQLITE_DONE ? GNUNET_OK : GNUNET_SYSERR;
+}
+
+
+/**
+ * Internal context for an iteration.
+ */
+struct IterContext
+{
+ /**
+ * FIXME.
+ */
+ sqlite3_stmt *stmt_1;
+
+ /**
+ * FIXME.
+ */
+ sqlite3_stmt *stmt_2;
+
+ /**
+ * FIXME.
+ */
+ int is_asc;
+
+ /**
+ * FIXME.
+ */
+ int is_prio;
+
+ /**
+ * FIXME.
+ */
+ int is_migr;
+
+ /**
+ * FIXME.
+ */
+ int limit_nonanonymous;
+
+ /**
+ * Desired type for blocks returned by this iterator.
+ */
+ enum GNUNET_BLOCK_Type type;
+};
+
+
+/**
+ * Prepare our SQL query to obtain the next record from the database.
+ *
+ * @param cls our "struct IterContext"
+ * @param nc NULL to terminate the iteration, otherwise our context for
+ * getting the next result.
+ * @return GNUNET_OK on success, GNUNET_NO if there are no more results,
+ * GNUNET_SYSERR on error (or end of iteration)
+ */
+static int
+iter_next_prepare (void *cls,
+ struct NextContext *nc)
{
+ struct IterContext *ic = cls;
+ struct Plugin *plugin;
+ int ret;
+
+ if (nc == NULL)
+ {
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to clean up iterator state.\n");
+#endif
+ sqlite3_finalize (ic->stmt_1);
+ sqlite3_finalize (ic->stmt_2);
+ return GNUNET_SYSERR;
+ }
+ sqlite3_reset (ic->stmt_1);
+ sqlite3_reset (ic->stmt_2);
+ plugin = nc->plugin;
+ if (ic->is_prio)
+ {
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Restricting to results larger than the last priority %u\n",
+ nc->lastPriority);
+#endif
+ sqlite3_bind_int (ic->stmt_1, 1, nc->lastPriority);
+ sqlite3_bind_int (ic->stmt_2, 1, nc->lastPriority);
+ }
+ else
+ {
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Restricting to results larger than the last expiration %llu\n",
+ (unsigned long long) nc->lastExpiration.abs_value);
+#endif
+ sqlite3_bind_int64 (ic->stmt_1, 1, nc->lastExpiration.abs_value);
+ sqlite3_bind_int64 (ic->stmt_2, 1, nc->lastExpiration.abs_value);
+ }
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Restricting to results larger than the last key `%s'\n",
+ GNUNET_h2s(&nc->lastKey));
+#endif
+ sqlite3_bind_blob (ic->stmt_1, 2,
+ &nc->lastKey,
+ sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT);
+ if (SQLITE_ROW == (ret = sqlite3_step (ic->stmt_1)))
+ {
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Result found using iterator 1\n");
+#endif
+ nc->stmt = ic->stmt_1;
+ return GNUNET_OK;
+ }
+ if (ret != SQLITE_DONE)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ return GNUNET_SYSERR;
+ }
+ if (SQLITE_OK != sqlite3_reset (ic->stmt_1))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ if (SQLITE_ROW == (ret = sqlite3_step (ic->stmt_2)))
+ {
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Result found using iterator 2\n");
+#endif
+ nc->stmt = ic->stmt_2;
+ return GNUNET_OK;
+ }
+ if (ret != SQLITE_DONE)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ return GNUNET_SYSERR;
+ }
+ if (SQLITE_OK != sqlite3_reset (ic->stmt_2))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "No result found using either iterator\n");
+#endif
+ return GNUNET_NO;
+}
+
+
+/**
+ * Call a method for each key in the database and
+ * call the callback method on it.
+ *
+ * @param plugin our plugin context
+ * @param type entries of which type should be considered?
+ * @param is_asc are we iterating in ascending order?
+ * @param is_prio are we iterating by priority (otherwise by expiration)
+ * @param is_migr are we iterating in migration order?
+ * @param limit_nonanonymous are we restricting results to those with anonymity
+ * level zero?
+ * @param stmt_str_1 first SQL statement to execute
+ * @param stmt_str_2 SQL statement to execute to get "more" results (inner iteration)
+ * @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
+basic_iter (struct Plugin *plugin,
+ enum GNUNET_BLOCK_Type type,
+ int is_asc,
+ int is_prio,
+ int is_migr,
+ int limit_nonanonymous,
+ const char *stmt_str_1,
+ const char *stmt_str_2,
+ PluginIterator iter,
+ void *iter_cls)
+{
+ struct NextContext *nc;
+ struct IterContext *ic;
+ sqlite3_stmt *stmt_1;
+ sqlite3_stmt *stmt_2;
+
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "At %llu, using queries `%s' and `%s'\n",
+ (unsigned long long) GNUNET_TIME_absolute_get ().abs_value,
+ stmt_str_1,
+ stmt_str_2);
+#endif
+ if (sq_prepare (plugin->dbh, stmt_str_1, &stmt_1) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_prepare_v2");
+ iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ if (sq_prepare (plugin->dbh, stmt_str_2, &stmt_2) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_prepare_v2");
+ sqlite3_finalize (stmt_1);
+ iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ nc = GNUNET_malloc (sizeof(struct NextContext) +
+ sizeof(struct IterContext));
+ nc->plugin = plugin;
+ nc->iter = iter;
+ nc->iter_cls = iter_cls;
+ nc->stmt = NULL;
+ ic = (struct IterContext*) &nc[1];
+ ic->stmt_1 = stmt_1;
+ ic->stmt_2 = stmt_2;
+ ic->type = type;
+ ic->is_asc = is_asc;
+ ic->is_prio = is_prio;
+ ic->is_migr = is_migr;
+ ic->limit_nonanonymous = limit_nonanonymous;
+ nc->prep = &iter_next_prepare;
+ nc->prep_cls = ic;
+ if (is_asc)
+ {
+ nc->lastPriority = 0;
+ nc->lastExpiration.abs_value = 0;
+ memset (&nc->lastKey, 0, sizeof (GNUNET_HashCode));
+ }
+ else
+ {
+ nc->lastPriority = 0x7FFFFFFF;
+ nc->lastExpiration.abs_value = 0x7FFFFFFFFFFFFFFFLL;
+ memset (&nc->lastKey, 255, sizeof (GNUNET_HashCode));
+ }
+ sqlite_next_request (nc, GNUNET_NO);
}
* Select a subset of the items in the datastore and call
* the given iterator for each of them.
*
+ * @param cls our plugin context
* @param type entries of which type should be considered?
* Use 0 for any type.
* @param iter function to call on each matching value;
*/
static void
sqlite_plugin_iter_low_priority (void *cls,
- uint32_t type,
- GNUNET_DATASTORE_Iterator iter,
- void *iter_cls)
+ enum GNUNET_BLOCK_Type type,
+ PluginIterator iter,
+ void *iter_cls)
{
+ basic_iter (cls,
+ type,
+ GNUNET_YES, GNUNET_YES,
+ GNUNET_NO, GNUNET_NO,
+ SELECT_IT_LOW_PRIORITY_1,
+ SELECT_IT_LOW_PRIORITY_2,
+ iter, iter_cls);
}
-
/**
* Select a subset of the items in the datastore and call
* the given iterator for each of them.
*
+ * @param cls our plugin context
* @param type entries of which type should be considered?
* Use 0 for any type.
* @param iter function to call on each matching value;
*/
static void
sqlite_plugin_iter_zero_anonymity (void *cls,
- uint32_t type,
- GNUNET_DATASTORE_Iterator iter,
- void *iter_cls)
+ enum GNUNET_BLOCK_Type type,
+ PluginIterator iter,
+ void *iter_cls)
{
+ struct GNUNET_TIME_Absolute now;
+ char *q1;
+ char *q2;
+
+ now = GNUNET_TIME_absolute_get ();
+ GNUNET_asprintf (&q1, SELECT_IT_NON_ANONYMOUS_1,
+ (unsigned long long) now.abs_value);
+ GNUNET_asprintf (&q2, SELECT_IT_NON_ANONYMOUS_2,
+ (unsigned long long) now.abs_value);
+ basic_iter (cls,
+ type,
+ GNUNET_NO, GNUNET_YES,
+ GNUNET_NO, GNUNET_YES,
+ q1,
+ q2,
+ iter, iter_cls);
+ GNUNET_free (q1);
+ GNUNET_free (q2);
}
* Select a subset of the items in the datastore and call
* the given iterator for each of them.
*
+ * @param cls our plugin context
* @param type entries of which type should be considered?
* Use 0 for any type.
* @param iter function to call on each matching value;
*/
static void
sqlite_plugin_iter_ascending_expiration (void *cls,
- uint32_t type,
- GNUNET_DATASTORE_Iterator iter,
- void *iter_cls)
+ enum GNUNET_BLOCK_Type type,
+ PluginIterator iter,
+ void *iter_cls)
{
-}
+ struct GNUNET_TIME_Absolute now;
+ char *q1;
+ char *q2;
+ now = GNUNET_TIME_absolute_get ();
+ GNUNET_asprintf (&q1, SELECT_IT_EXPIRATION_TIME_1,
+ (unsigned long long) 0*now.abs_value);
+ GNUNET_asprintf (&q2, SELECT_IT_EXPIRATION_TIME_2,
+ (unsigned long long) 0*now.abs_value);
+ basic_iter (cls,
+ type,
+ GNUNET_YES, GNUNET_NO,
+ GNUNET_NO, GNUNET_NO,
+ q1, q2,
+ iter, iter_cls);
+ GNUNET_free (q1);
+ GNUNET_free (q2);
+}
/**
* Select a subset of the items in the datastore and call
* the given iterator for each of them.
*
+ * @param cls our plugin context
* @param type entries of which type should be considered?
* Use 0 for any type.
* @param iter function to call on each matching value;
*/
static void
sqlite_plugin_iter_migration_order (void *cls,
- uint32_t type,
- GNUNET_DATASTORE_Iterator iter,
- void *iter_cls)
+ enum GNUNET_BLOCK_Type type,
+ PluginIterator iter,
+ void *iter_cls)
{
+ struct GNUNET_TIME_Absolute now;
+ char *q;
+
+ now = GNUNET_TIME_absolute_get ();
+ GNUNET_asprintf (&q, SELECT_IT_MIGRATION_ORDER_2,
+ (unsigned long long) now.abs_value);
+ basic_iter (cls,
+ type,
+ GNUNET_NO, GNUNET_NO,
+ GNUNET_YES, GNUNET_NO,
+ SELECT_IT_MIGRATION_ORDER_1,
+ q,
+ iter, iter_cls);
+ GNUNET_free (q);
}
+/**
+ * Call sqlite using the already prepared query to get
+ * the next result.
+ *
+ * @param cls not used
+ * @param nc context with the prepared query
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error, GNUNET_NO if
+ * there are no more results
+ */
+static int
+all_next_prepare (void *cls,
+ struct NextContext *nc)
+{
+ struct Plugin *plugin;
+ int ret;
+
+ if (nc == NULL)
+ {
+#if DEBUG_SQLITE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to clean up iterator state.\n");
+#endif
+ return GNUNET_SYSERR;
+ }
+ plugin = nc->plugin;
+ if (SQLITE_ROW == (ret = sqlite3_step (nc->stmt)))
+ {
+ return GNUNET_OK;
+ }
+ if (ret != SQLITE_DONE)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_NO;
+}
+
/**
* Select a subset of the items in the datastore and call
* the given iterator for each of them.
*
+ * @param cls our plugin context
* @param type entries of which type should be considered?
* Use 0 for any type.
* @param iter function to call on each matching value;
*/
static void
sqlite_plugin_iter_all_now (void *cls,
- uint32_t type,
- GNUNET_DATASTORE_Iterator iter,
- void *iter_cls)
+ enum GNUNET_BLOCK_Type type,
+ PluginIterator iter,
+ void *iter_cls)
{
+ struct Plugin *plugin = cls;
+ struct NextContext *nc;
+ sqlite3_stmt *stmt;
+
+ if (sq_prepare (plugin->dbh,
+ "SELECT size,type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn080",
+ &stmt) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_prepare_v2");
+ iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ nc = GNUNET_malloc (sizeof(struct NextContext));
+ nc->plugin = plugin;
+ nc->iter = iter;
+ nc->iter_cls = iter_cls;
+ nc->stmt = stmt;
+ nc->prep = &all_next_prepare;
+ nc->prep_cls = NULL;
+ sqlite_next_request (nc, GNUNET_NO);
+}
+
+
+/**
+ * FIXME.
+ */
+struct GetNextContext
+{
+
+ /**
+ * FIXME.
+ */
+ int total;
+
+ /**
+ * FIXME.
+ */
+ int off;
+
+ /**
+ * FIXME.
+ */
+ int have_vhash;
+
+ /**
+ * FIXME.
+ */
+ unsigned int type;
+
+ /**
+ * FIXME.
+ */
+ sqlite3_stmt *stmt;
+
+ /**
+ * FIXME.
+ */
+ GNUNET_HashCode key;
+
+ /**
+ * FIXME.
+ */
+ GNUNET_HashCode vhash;
+};
+
+
+
+/**
+ * FIXME.
+ *
+ * @param cls our "struct GetNextContext*"
+ * @param nc FIXME
+ * @return GNUNET_YES if there are more results,
+ * GNUNET_NO if there are no more results,
+ * GNUNET_SYSERR on internal error
+ */
+static int
+get_next_prepare (void *cls,
+ struct NextContext *nc)
+{
+ struct GetNextContext *gnc = cls;
+ int sqoff;
+ int ret;
+ int limit_off;
+
+ if (nc == NULL)
+ {
+ sqlite3_finalize (gnc->stmt);
+ return GNUNET_SYSERR;
+ }
+ if (nc->count == gnc->total)
+ return GNUNET_NO;
+ if (nc->count + gnc->off == gnc->total)
+ nc->last_rowid = 0;
+ if (nc->count == 0)
+ limit_off = gnc->off;
+ else
+ limit_off = 0;
+ sqoff = 1;
+ sqlite3_reset (nc->stmt);
+ ret = sqlite3_bind_blob (nc->stmt,
+ sqoff++,
+ &gnc->key,
+ sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT);
+ if ((gnc->have_vhash) && (ret == SQLITE_OK))
+ ret = sqlite3_bind_blob (nc->stmt,
+ sqoff++,
+ &gnc->vhash,
+ sizeof (GNUNET_HashCode), SQLITE_TRANSIENT);
+ if ((gnc->type != 0) && (ret == SQLITE_OK))
+ ret = sqlite3_bind_int (nc->stmt, sqoff++, gnc->type);
+ if (ret == SQLITE_OK)
+ ret = sqlite3_bind_int64 (nc->stmt, sqoff++, nc->last_rowid + 1);
+ if (ret == SQLITE_OK)
+ ret = sqlite3_bind_int (nc->stmt, sqoff++, limit_off);
+ if (ret != SQLITE_OK)
+ return GNUNET_SYSERR;
+ if (SQLITE_ROW != sqlite3_step (nc->stmt))
+ return GNUNET_NO;
+ return GNUNET_OK;
+}
+
+
+/**
+ * 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,
+ enum GNUNET_BLOCK_Type type,
+ PluginIterator iter, void *iter_cls)
+{
+ struct Plugin *plugin = cls;
+ struct GetNextContext *gpc;
+ struct NextContext *nc;
+ int ret;
+ int total;
+ sqlite3_stmt *stmt;
+ char scratch[256];
+ int sqoff;
+
+ GNUNET_assert (iter != NULL);
+ if (key == NULL)
+ {
+ sqlite_plugin_iter_low_priority (cls, type, iter, iter_cls);
+ return;
+ }
+ GNUNET_snprintf (scratch, sizeof (scratch),
+ "SELECT count(*) FROM gn080 WHERE hash=:1%s%s",
+ vhash == NULL ? "" : " AND vhash=:2",
+ type == 0 ? "" : (vhash ==
+ NULL) ? " AND type=:2" : " AND type=:3");
+ if (sq_prepare (plugin->dbh, scratch, &stmt) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, "sqlite_prepare");
+ iter (iter_cls, NULL, 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_reset (stmt);
+ sqlite3_finalize (stmt);
+ iter (iter_cls, NULL, 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_reset (stmt);
+ sqlite3_finalize (stmt);
+ iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ total = sqlite3_column_int (stmt, 0);
+ sqlite3_reset (stmt);
+ sqlite3_finalize (stmt);
+ if (0 == total)
+ {
+ iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+
+ GNUNET_snprintf (scratch, sizeof (scratch),
+ "SELECT size, type, prio, anonLevel, expire, hash, value, _ROWID_ "
+ "FROM gn080 WHERE hash=:1%s%s AND _ROWID_ >= :%d "
+ "ORDER BY _ROWID_ ASC LIMIT 1 OFFSET :d",
+ vhash == NULL ? "" : " AND vhash=:2",
+ type == 0 ? "" : (vhash ==
+ NULL) ? " AND type=:2" : " AND type=:3",
+ sqoff, sqoff + 1);
+ if (sq_prepare (plugin->dbh, scratch, &stmt) != SQLITE_OK)
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite_prepare");
+ iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
+ return;
+ }
+ nc = GNUNET_malloc (sizeof(struct NextContext) +
+ sizeof(struct GetNextContext));
+ nc->plugin = plugin;
+ nc->iter = iter;
+ nc->iter_cls = iter_cls;
+ nc->stmt = stmt;
+ gpc = (struct GetNextContext*) &nc[1];
+ gpc->total = total;
+ gpc->type = type;
+ gpc->key = *key;
+ gpc->stmt = stmt; /* alias used for freeing at the end! */
+ if (NULL != vhash)
+ {
+ gpc->have_vhash = GNUNET_YES;
+ gpc->vhash = *vhash;
+ }
+ gpc->off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, total);
+ nc->prep = &get_next_prepare;
+ nc->prep_cls = gpc;
+ sqlite_next_request (nc, GNUNET_NO);
}
/**
* Drop database.
+ *
+ * @param cls our plugin context
*/
static void
sqlite_plugin_drop (void *cls)
{
+ struct Plugin *plugin = cls;
+ plugin->drop_on_shutdown = GNUNET_YES;
}
+static unsigned long long
+sqlite_plugin_get_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->cls = &plugin;
api->get_size = &sqlite_plugin_get_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;
/**
* 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 (plugin->next_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (plugin->next_task);
+ plugin->next_task = GNUNET_SCHEDULER_NO_TASK;
+ plugin->next_task_nc->prep (plugin->next_task_nc->prep_cls, NULL);
+ GNUNET_free (plugin->next_task_nc);
+ plugin->next_task_nc = NULL;
+ }
+ fn = NULL;
+ if (plugin->drop_on_shutdown)
+ fn = GNUNET_strdup (plugin->fn);
+ 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);
+ }
return NULL;
}
projects / oweals / gnunet.git / blobdiff