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- /*
- * This file is part of GNUnet
- * Copyright (C) 2009, 2011, 2017 GNUnet e.V.
- *
- * GNUnet is free software: you can redistribute it and/or modify it
- * under the terms of the GNU Affero General Public License as published
- * by the Free Software Foundation, either version 3 of the License,
- * 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
- * Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file datastore/plugin_datastore_sqlite.c
- * @brief sqlite-based datastore backend
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet_datastore_plugin.h"
- #include "gnunet_sq_lib.h"
- #include <sqlite3.h>
- /**
- * 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, level, cmd) do { GNUNET_log_from (level, "sqlite", _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, sqlite3_errmsg(db->dbh)); } while(0)
- /**
- * 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_MSG(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)); 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
- {
- /**
- * Our execution environment.
- */
- struct GNUNET_DATASTORE_PluginEnvironment *env;
- /**
- * Database filename.
- */
- char *fn;
- /**
- * Native SQLite database handle.
- */
- sqlite3 *dbh;
- /**
- * Precompiled SQL for remove_key.
- */
- sqlite3_stmt *remove;
- /**
- * Precompiled SQL for deletion.
- */
- sqlite3_stmt *delRow;
- /**
- * Precompiled SQL for update.
- */
- sqlite3_stmt *update;
- /**
- * 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;
- /**
- * Precompiled SQL for selection
- */
- sqlite3_stmt *get[8];
- /**
- * 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;
- int result;
- result = sqlite3_prepare_v2 (dbh,
- zSql,
- strlen (zSql),
- ppStmt,
- (const char **) &dummy);
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "sqlite",
- "Prepared `%s' / %p: %d\n",
- zSql,
- *ppStmt,
- result);
- return result;
- }
- /**
- * Create our database indices.
- *
- * @param dbh handle to the database
- */
- static void
- create_indices (sqlite3 * dbh)
- {
- /* create indices */
- if (0 !=
- (SQLITE_OK !=
- sqlite3_exec (dbh, "CREATE INDEX IF NOT EXISTS idx_hash ON gn091 (hash)",
- NULL, NULL, NULL)) +
- (SQLITE_OK !=
- sqlite3_exec (dbh,
- "CREATE INDEX IF NOT EXISTS idx_anon_type ON gn091 (anonLevel ASC,type)",
- NULL, NULL, NULL)) +
- (SQLITE_OK !=
- sqlite3_exec (dbh,
- "CREATE INDEX IF NOT EXISTS idx_expire ON gn091 (expire ASC)",
- NULL, NULL, NULL)) +
- (SQLITE_OK !=
- sqlite3_exec (dbh,
- "CREATE INDEX IF NOT EXISTS idx_repl_rvalue ON gn091 (repl,rvalue)",
- 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 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_config_missing (GNUNET_ERROR_TYPE_ERROR,
- "datastore-sqlite",
- "FILENAME");
- 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! */
- if (NULL != plugin->env->duc)
- plugin->env->duc (plugin->env->cls,
- 0);
- }
- /* afsdir should be UTF-8-encoded. If it isn't, it's a bug */
- plugin->fn = afsdir;
- /* Open database and precompile statements */
- if (SQLITE_OK !=
- sqlite3_open (plugin->fn, &plugin->dbh))
- {
- 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 page_size=4096", 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 = 'gn091'",
- &stmt));
- /* FIXME: SQLite does not have unsigned integers! This is ok for the type column because
- * we only test equality on it and can cast it to/from uint32_t. For repl, prio, and anonLevel
- * we do math or inequality tests, so we can't handle the entire range of uint32_t.
- * This will also cause problems for expiration times after 294247-01-10-04:00:54 UTC.
- */
- if ( (SQLITE_DONE ==
- sqlite3_step (stmt)) &&
- (SQLITE_OK !=
- sqlite3_exec (plugin->dbh,
- "CREATE TABLE gn091 ("
- " 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)) )
- {
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR,
- "sqlite3_exec");
- sqlite3_finalize (stmt);
- return GNUNET_SYSERR;
- }
- sqlite3_finalize (stmt);
- create_indices (plugin->dbh);
- #define RESULT_COLUMNS "repl, type, prio, anonLevel, expire, hash, value, _ROWID_"
- if ( (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "UPDATE gn091 "
- "SET prio = prio + ?, "
- "repl = repl + ?, "
- "expire = MAX(expire, ?) "
- "WHERE hash = ? AND vhash = ?",
- &plugin->update)) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "UPDATE gn091 " "SET repl = MAX (0, repl - 1) WHERE _ROWID_ = ?",
- &plugin->updRepl)) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE repl=?2 AND " " (rvalue>=?1 OR "
- " NOT EXISTS (SELECT 1 FROM gn091 "
- "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 gn091",
- &plugin->maxRepl)) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE NOT EXISTS (SELECT 1 FROM gn091 WHERE expire < ?1 LIMIT 1) OR (expire < ?1) "
- "ORDER BY expire ASC LIMIT 1",
- &plugin->selExpi)) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ? AND "
- "anonLevel = 0 AND "
- "type = ? "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->selZeroAnon)) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "INSERT INTO gn091 (repl, type, prio, anonLevel, expire, rvalue, hash, vhash, value) "
- "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)",
- &plugin->insertContent)) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[0])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 AND "
- "type = ?4 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[1])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 AND "
- "hash = ?3 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[2])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 AND "
- "hash = ?3 AND "
- "type = ?4 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[3])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 AND "
- "rvalue >= ?2 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[4])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 AND "
- "rvalue >= ?2 AND "
- "type = ?4 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[5])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 AND "
- "rvalue >= ?2 AND "
- "hash = ?3 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[6])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT " RESULT_COLUMNS " FROM gn091 "
- "WHERE _ROWID_ >= ?1 AND "
- "rvalue >= ?2 AND "
- "hash = ?3 AND "
- "type = ?4 "
- "ORDER BY _ROWID_ ASC LIMIT 1",
- &plugin->get[7])) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "DELETE FROM gn091 WHERE _ROWID_ = ?",
- &plugin->delRow)) ||
- (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "DELETE FROM gn091 "
- "WHERE hash = ? AND "
- "value = ? ",
- &plugin->remove)) ||
- false)
- {
- LOG_SQLITE (plugin,
- 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 (NULL != plugin->remove)
- sqlite3_finalize (plugin->remove);
- if (NULL != plugin->delRow)
- sqlite3_finalize (plugin->delRow);
- if (NULL != plugin->update)
- sqlite3_finalize (plugin->update);
- if (NULL != plugin->updRepl)
- sqlite3_finalize (plugin->updRepl);
- if (NULL != plugin->selRepl)
- sqlite3_finalize (plugin->selRepl);
- if (NULL != plugin->maxRepl)
- sqlite3_finalize (plugin->maxRepl);
- if (NULL != plugin->selExpi)
- sqlite3_finalize (plugin->selExpi);
- if (NULL != plugin->selZeroAnon)
- sqlite3_finalize (plugin->selZeroAnon);
- if (NULL != plugin->insertContent)
- sqlite3_finalize (plugin->insertContent);
- for (int i = 0; i < 8; ++i)
- if (NULL != plugin->get[i])
- sqlite3_finalize (plugin->get[i]);
- 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 (NULL != stmt)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "sqlite",
- "Closing statement %p\n",
- stmt);
- result = sqlite3_finalize (stmt);
- if (result != SQLITE_OK)
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "sqlite",
- "Failed to close statement %p: %d\n",
- stmt,
- result);
- stmt = sqlite3_next_stmt (plugin->dbh,
- NULL);
- }
- result = sqlite3_close (plugin->dbh);
- }
- #endif
- if (SQLITE_OK != result)
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR,
- "sqlite3_close");
- 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,
- uint64_t rid)
- {
- struct GNUNET_SQ_QueryParam params[] = {
- GNUNET_SQ_query_param_uint64 (&rid),
- GNUNET_SQ_query_param_end
- };
- if (GNUNET_OK !=
- GNUNET_SQ_bind (plugin->delRow,
- params))
- return GNUNET_SYSERR;
- if (SQLITE_DONE != sqlite3_step (plugin->delRow))
- {
- LOG_SQLITE (plugin, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- GNUNET_SQ_reset (plugin->dbh,
- plugin->delRow);
- return GNUNET_SYSERR;
- }
- GNUNET_SQ_reset (plugin->dbh,
- plugin->delRow);
- return GNUNET_OK;
- }
- /**
- * Store an item in the datastore.
- *
- * @param cls closure
- * @param key key for the item
- * @param absent true if the key was not found in the bloom filter
- * @param size number of bytes in @a 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 replication replication-level for the content
- * @param expiration expiration time for the content
- * @param cont continuation called with success or failure status
- * @param cont_cls continuation closure
- */
- static void
- sqlite_plugin_put (void *cls,
- const struct GNUNET_HashCode *key,
- bool absent,
- 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,
- PluginPutCont cont,
- void *cont_cls)
- {
- struct Plugin *plugin = cls;
- struct GNUNET_HashCode vhash;
- char *msg = NULL;
- GNUNET_CRYPTO_hash (data,
- size,
- &vhash);
- if (!absent)
- {
- struct GNUNET_SQ_QueryParam params[] = {
- GNUNET_SQ_query_param_uint32 (&priority),
- GNUNET_SQ_query_param_uint32 (&replication),
- GNUNET_SQ_query_param_absolute_time (&expiration),
- GNUNET_SQ_query_param_auto_from_type (key),
- GNUNET_SQ_query_param_auto_from_type (&vhash),
- GNUNET_SQ_query_param_end
- };
- if (GNUNET_OK !=
- GNUNET_SQ_bind (plugin->update,
- params))
- {
- cont (cont_cls,
- key,
- size,
- GNUNET_SYSERR,
- _("sqlite bind failure"));
- return;
- }
- if (SQLITE_DONE != sqlite3_step (plugin->update))
- {
- LOG_SQLITE_MSG (plugin, &msg, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- cont (cont_cls,
- key,
- size,
- GNUNET_SYSERR,
- msg);
- GNUNET_free_non_null (msg);
- return;
- }
- int changes = sqlite3_changes (plugin->dbh);
- GNUNET_SQ_reset (plugin->dbh,
- plugin->update);
- if (0 != changes)
- {
- cont (cont_cls,
- key,
- size,
- GNUNET_NO,
- NULL);
- return;
- }
- }
- uint64_t rvalue;
- uint32_t type32 = (uint32_t) type;
- struct GNUNET_SQ_QueryParam params[] = {
- GNUNET_SQ_query_param_uint32 (&replication),
- GNUNET_SQ_query_param_uint32 (&type32),
- GNUNET_SQ_query_param_uint32 (&priority),
- GNUNET_SQ_query_param_uint32 (&anonymity),
- GNUNET_SQ_query_param_absolute_time (&expiration),
- GNUNET_SQ_query_param_uint64 (&rvalue),
- GNUNET_SQ_query_param_auto_from_type (key),
- GNUNET_SQ_query_param_auto_from_type (&vhash),
- GNUNET_SQ_query_param_fixed_size (data, size),
- GNUNET_SQ_query_param_end
- };
- int n;
- int ret;
- sqlite3_stmt *stmt;
- if (size > MAX_ITEM_SIZE)
- {
- cont (cont_cls, key, size, GNUNET_SYSERR, _("Data too large"));
- return;
- }
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
- "Storing in database block with type %u/key `%s'/priority %u/expiration in %s (%s).\n",
- type,
- GNUNET_h2s (key),
- priority,
- GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (expiration),
- GNUNET_YES),
- GNUNET_STRINGS_absolute_time_to_string (expiration));
- stmt = plugin->insertContent;
- rvalue = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK, UINT64_MAX);
- if (GNUNET_OK !=
- GNUNET_SQ_bind (stmt,
- params))
- {
- cont (cont_cls, key, size, GNUNET_SYSERR, NULL);
- return;
- }
- n = sqlite3_step (stmt);
- switch (n)
- {
- case SQLITE_DONE:
- if (NULL != plugin->env->duc)
- plugin->env->duc (plugin->env->cls,
- size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "sqlite",
- "Stored new entry (%u bytes)\n",
- size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
- ret = GNUNET_OK;
- break;
- case SQLITE_BUSY:
- GNUNET_break (0);
- LOG_SQLITE_MSG (plugin,
- &msg,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- ret = GNUNET_SYSERR;
- break;
- default:
- LOG_SQLITE_MSG (plugin,
- &msg,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- GNUNET_SQ_reset (plugin->dbh,
- stmt);
- database_shutdown (plugin);
- database_setup (plugin->env->cfg, plugin);
- cont (cont_cls, key, size, GNUNET_SYSERR, msg);
- GNUNET_free_non_null(msg);
- return;
- }
- GNUNET_SQ_reset (plugin->dbh,
- stmt);
- cont (cont_cls, key, size, ret, msg);
- GNUNET_free_non_null(msg);
- }
- /**
- * Execute statement that gets a row and call the callback
- * with the result. Resets the statement afterwards.
- *
- * @param plugin the plugin
- * @param stmt the statement
- * @param proc processor to call
- * @param proc_cls closure for @a proc
- */
- static void
- execute_get (struct Plugin *plugin,
- sqlite3_stmt *stmt,
- PluginDatumProcessor proc,
- void *proc_cls)
- {
- int n;
- struct GNUNET_TIME_Absolute expiration;
- uint32_t replication;
- uint32_t type;
- uint32_t priority;
- uint32_t anonymity;
- uint64_t rowid;
- void *value;
- size_t value_size;
- struct GNUNET_HashCode key;
- int ret;
- struct GNUNET_SQ_ResultSpec rs[] = {
- GNUNET_SQ_result_spec_uint32 (&replication),
- GNUNET_SQ_result_spec_uint32 (&type),
- GNUNET_SQ_result_spec_uint32 (&priority),
- GNUNET_SQ_result_spec_uint32 (&anonymity),
- GNUNET_SQ_result_spec_absolute_time (&expiration),
- GNUNET_SQ_result_spec_auto_from_type (&key),
- GNUNET_SQ_result_spec_variable_size (&value,
- &value_size),
- GNUNET_SQ_result_spec_uint64 (&rowid),
- GNUNET_SQ_result_spec_end
- };
- n = sqlite3_step (stmt);
- switch (n)
- {
- case SQLITE_ROW:
- if (GNUNET_OK !=
- GNUNET_SQ_extract_result (stmt,
- rs))
- {
- GNUNET_break (0);
- break;
- }
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "sqlite",
- "Found reply in database with expiration %s\n",
- GNUNET_STRINGS_absolute_time_to_string (expiration));
- ret = proc (proc_cls,
- &key,
- value_size,
- value,
- type,
- priority,
- anonymity,
- replication,
- expiration,
- rowid);
- GNUNET_SQ_cleanup_result (rs);
- GNUNET_SQ_reset (plugin->dbh,
- stmt);
- if ( (GNUNET_NO == ret) &&
- (GNUNET_OK == delete_by_rowid (plugin,
- rowid)) &&
- (NULL != plugin->env->duc) )
- plugin->env->duc (plugin->env->cls,
- -(value_size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
- return;
- case SQLITE_DONE:
- /* database must be empty */
- break;
- case SQLITE_BUSY:
- case SQLITE_ERROR:
- case SQLITE_MISUSE:
- default:
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- if (SQLITE_OK !=
- sqlite3_reset (stmt))
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_reset");
- GNUNET_break (0);
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- database_shutdown (plugin);
- database_setup (plugin->env->cfg,
- plugin);
- return;
- }
- GNUNET_SQ_reset (plugin->dbh,
- stmt);
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- }
- /**
- * Select a subset of the items in the datastore and call
- * the given processor for the item.
- *
- * @param cls our plugin context
- * @param next_uid return the result with lowest uid >= next_uid
- * @param type entries of which type should be considered?
- * Must not be zero (ANY).
- * @param proc function to call on the matching value;
- * will be called with NULL if no value matches
- * @param proc_cls closure for @a proc
- */
- static void
- sqlite_plugin_get_zero_anonymity (void *cls,
- uint64_t next_uid,
- enum GNUNET_BLOCK_Type type,
- PluginDatumProcessor proc,
- void *proc_cls)
- {
- struct Plugin *plugin = cls;
- uint32_t type32 = type;
- struct GNUNET_SQ_QueryParam params[] = {
- GNUNET_SQ_query_param_uint64 (&next_uid),
- GNUNET_SQ_query_param_uint32 (&type32),
- GNUNET_SQ_query_param_end
- };
- GNUNET_assert (type != GNUNET_BLOCK_TYPE_ANY);
- if (GNUNET_OK !=
- GNUNET_SQ_bind (plugin->selZeroAnon,
- params))
- {
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- execute_get (plugin, plugin->selZeroAnon, proc, proc_cls);
- }
- /**
- * Get results for a particular key in the datastore.
- *
- * @param cls closure
- * @param next_uid return the result with lowest uid >= next_uid
- * @param random if true, return a random result instead of using next_uid
- * @param key maybe NULL (to match all entries)
- * @param type entries of which type are relevant?
- * Use 0 for any type.
- * @param proc function to call on the matching value;
- * will be called with NULL if nothing matches
- * @param proc_cls closure for @a proc
- */
- static void
- sqlite_plugin_get_key (void *cls,
- uint64_t next_uid,
- bool random,
- const struct GNUNET_HashCode *key,
- enum GNUNET_BLOCK_Type type,
- PluginDatumProcessor proc,
- void *proc_cls)
- {
- struct Plugin *plugin = cls;
- uint64_t rvalue;
- int use_rvalue = random;
- uint32_t type32 = (uint32_t) type;
- int use_type = GNUNET_BLOCK_TYPE_ANY != type;
- int use_key = NULL != key;
- sqlite3_stmt *stmt = plugin->get[use_rvalue * 4 + use_key * 2 + use_type];
- struct GNUNET_SQ_QueryParam params[] = {
- GNUNET_SQ_query_param_uint64 (&next_uid),
- GNUNET_SQ_query_param_uint64 (&rvalue),
- GNUNET_SQ_query_param_auto_from_type (key),
- GNUNET_SQ_query_param_uint32 (&type32),
- GNUNET_SQ_query_param_end
- };
- /* SQLite doesn't like it when you try to bind a parameter greater than the
- * last numbered parameter, but unused parameters in the middle are OK.
- */
- if (! use_type)
- {
- params[3] = (struct GNUNET_SQ_QueryParam) GNUNET_SQ_query_param_end;
- if (! use_key)
- {
- params[2] = (struct GNUNET_SQ_QueryParam) GNUNET_SQ_query_param_end;
- if (! use_rvalue)
- params[1] = (struct GNUNET_SQ_QueryParam) GNUNET_SQ_query_param_end;
- }
- }
- if (random)
- {
- rvalue = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
- UINT64_MAX);
- next_uid = 0;
- }
- else
- rvalue = 0;
- if (GNUNET_OK !=
- GNUNET_SQ_bind (stmt,
- params))
- {
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- execute_get (plugin,
- stmt,
- proc,
- proc_cls);
- }
- /**
- * Context for #repl_proc() function.
- */
- struct ReplCtx
- {
- /**
- * Function to call for the result (or the NULL).
- */
- PluginDatumProcessor proc;
- /**
- * Closure for @e 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_get_replication().
- * Decrements the replication counter and calls the original
- * processor.
- *
- * @param cls closure
- * @param key key for the content
- * @param size number of bytes in @a 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 replication replication-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 struct 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,
- uint64_t uid)
- {
- struct ReplCtx *rc = cls;
- int ret;
- if (GNUNET_SYSERR == rc->have_uid)
- rc->have_uid = GNUNET_NO;
- ret = rc->proc (rc->proc_cls,
- key,
- size,
- data,
- type,
- priority,
- anonymity,
- replication,
- expiration,
- uid);
- if (NULL != key)
- {
- 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 @a 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 @a proc
- */
- static void
- sqlite_plugin_get_replication (void *cls,
- PluginDatumProcessor proc,
- void *proc_cls)
- {
- struct Plugin *plugin = cls;
- struct ReplCtx rc;
- uint64_t rvalue;
- uint32_t repl;
- struct GNUNET_SQ_QueryParam params_sel_repl[] = {
- GNUNET_SQ_query_param_uint64 (&rvalue),
- GNUNET_SQ_query_param_uint32 (&repl),
- GNUNET_SQ_query_param_end
- };
- struct GNUNET_SQ_QueryParam params_upd_repl[] = {
- GNUNET_SQ_query_param_uint64 (&rc.uid),
- GNUNET_SQ_query_param_end
- };
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "datastore-sqlite",
- "Getting random block based on replication order.\n");
- if (SQLITE_ROW !=
- sqlite3_step (plugin->maxRepl))
- {
- GNUNET_SQ_reset (plugin->dbh,
- plugin->maxRepl);
- /* DB empty */
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- repl = sqlite3_column_int (plugin->maxRepl,
- 0);
- GNUNET_SQ_reset (plugin->dbh,
- plugin->maxRepl);
- rvalue = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_WEAK,
- UINT64_MAX);
- if (GNUNET_OK !=
- GNUNET_SQ_bind (plugin->selRepl,
- params_sel_repl))
- {
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- rc.have_uid = GNUNET_SYSERR;
- rc.proc = proc;
- rc.proc_cls = proc_cls;
- execute_get (plugin,
- plugin->selRepl,
- &repl_proc,
- &rc);
- if (GNUNET_YES == rc.have_uid)
- {
- if (GNUNET_OK !=
- GNUNET_SQ_bind (plugin->updRepl,
- params_upd_repl))
- {
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- if (SQLITE_DONE !=
- sqlite3_step (plugin->updRepl))
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- GNUNET_SQ_reset (plugin->dbh,
- plugin->updRepl);
- }
- if (GNUNET_SYSERR == rc.have_uid)
- {
- /* proc was not called at all so far, do it now. */
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- }
- }
- /**
- * Get a random item that has expired or has low priority.
- * Call @a 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 @a proc
- */
- static void
- sqlite_plugin_get_expiration (void *cls, PluginDatumProcessor proc,
- void *proc_cls)
- {
- struct Plugin *plugin = cls;
- sqlite3_stmt *stmt;
- struct GNUNET_TIME_Absolute now;
- struct GNUNET_SQ_QueryParam params[] = {
- GNUNET_SQ_query_param_absolute_time (&now),
- GNUNET_SQ_query_param_end
- };
- GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "sqlite",
- "Getting random block based on expiration and priority order.\n");
- now = GNUNET_TIME_absolute_get ();
- stmt = plugin->selExpi;
- if (GNUNET_OK !=
- GNUNET_SQ_bind (stmt,
- params))
- {
- proc (proc_cls, NULL, 0, NULL, 0, 0, 0, 0, GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- execute_get (plugin, stmt, proc, proc_cls);
- }
- /**
- * Get all of the keys in the datastore.
- *
- * @param cls closure
- * @param proc function to call on each key
- * @param proc_cls closure for @a proc
- */
- static void
- sqlite_plugin_get_keys (void *cls,
- PluginKeyProcessor proc,
- void *proc_cls)
- {
- struct Plugin *plugin = cls;
- struct GNUNET_HashCode key;
- struct GNUNET_SQ_ResultSpec results[] = {
- GNUNET_SQ_result_spec_auto_from_type (&key),
- GNUNET_SQ_result_spec_end
- };
- sqlite3_stmt *stmt;
- int ret;
- GNUNET_assert (NULL != proc);
- if (SQLITE_OK !=
- sq_prepare (plugin->dbh,
- "SELECT hash FROM gn091",
- &stmt))
- {
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite_prepare");
- proc (proc_cls,
- NULL,
- 0);
- return;
- }
- while (SQLITE_ROW == (ret = sqlite3_step (stmt)))
- {
- if (GNUNET_OK ==
- GNUNET_SQ_extract_result (stmt,
- results))
- proc (proc_cls,
- &key,
- 1);
- else
- GNUNET_break (0);
- }
- if (SQLITE_DONE != ret)
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR,
- "sqlite_step");
- sqlite3_finalize (stmt);
- proc (proc_cls,
- NULL,
- 0);
- }
- /**
- * Drop database.
- *
- * @param cls our plugin context
- */
- static void
- sqlite_plugin_drop (void *cls)
- {
- struct Plugin *plugin = cls;
- plugin->drop_on_shutdown = GNUNET_YES;
- }
- /**
- * Remove a particular key in the datastore.
- *
- * @param cls closure
- * @param key key for the content
- * @param size number of bytes in data
- * @param data content stored
- * @param cont continuation called with success or failure status
- * @param cont_cls continuation closure for @a cont
- */
- static void
- sqlite_plugin_remove_key (void *cls,
- const struct GNUNET_HashCode *key,
- uint32_t size,
- const void *data,
- PluginRemoveCont cont,
- void *cont_cls)
- {
- struct Plugin *plugin = cls;
- struct GNUNET_SQ_QueryParam params[] = {
- GNUNET_SQ_query_param_auto_from_type (key),
- GNUNET_SQ_query_param_fixed_size (data, size),
- GNUNET_SQ_query_param_end
- };
- if (GNUNET_OK !=
- GNUNET_SQ_bind (plugin->remove,
- params))
- {
- cont (cont_cls,
- key,
- size,
- GNUNET_SYSERR,
- "bind failed");
- return;
- }
- if (SQLITE_DONE != sqlite3_step (plugin->remove))
- {
- LOG_SQLITE (plugin,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- GNUNET_SQ_reset (plugin->dbh,
- plugin->remove);
- cont (cont_cls,
- key,
- size,
- GNUNET_SYSERR,
- "sqlite3_step failed");
- return;
- }
- int changes = sqlite3_changes (plugin->dbh);
- GNUNET_SQ_reset (plugin->dbh,
- plugin->remove);
- if (0 == changes)
- {
- cont (cont_cls,
- key,
- size,
- GNUNET_NO,
- NULL);
- return;
- }
- if (NULL != plugin->env->duc)
- plugin->env->duc (plugin->env->cls,
- -(size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
- cont (cont_cls,
- key,
- size,
- GNUNET_OK,
- NULL);
- }
- /**
- * 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 void
- sqlite_plugin_estimate_size (void *cls,
- unsigned long long *estimate)
- {
- struct Plugin *plugin = cls;
- sqlite3_stmt *stmt;
- uint64_t pages;
- uint64_t page_size;
- #if ENULL_DEFINED
- char *e;
- #endif
- if (NULL == estimate)
- return;
- if (SQLITE_VERSION_NUMBER < 3006000)
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "datastore-sqlite",
- _("sqlite version to old to determine size, assuming zero\n"));
- *estimate = 0;
- return;
- }
- 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);
- *estimate = 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;
- if (NULL != plugin.env)
- 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_new (struct GNUNET_DATASTORE_PluginFunctions);
- api->cls = &plugin;
- api->estimate_size = &sqlite_plugin_estimate_size;
- api->put = &sqlite_plugin_put;
- 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->get_keys = &sqlite_plugin_get_keys;
- api->drop = &sqlite_plugin_drop;
- api->remove_key = &sqlite_plugin_remove_key;
- 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_log_from (GNUNET_ERROR_TYPE_DEBUG,
- "sqlite",
- "sqlite plugin is done\n");
- fn = NULL;
- if (plugin->drop_on_shutdown)
- fn = GNUNET_strdup (plugin->fn);
- database_shutdown (plugin);
- plugin->env = NULL;
- GNUNET_free (api);
- if (NULL != fn)
- {
- if (0 != UNLINK (fn))
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
- "unlink",
- fn);
- GNUNET_free (fn);
- }
- return NULL;
- }
- /* end of plugin_datastore_sqlite.c */
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