/*
This file is part of GNUnet
- (C) 2006, 2009 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2006, 2009, 2015 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
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.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
#include "gnunet_datacache_plugin.h"
#include <sqlite3.h>
-#define DEBUG_DATACACHE_SQLITE GNUNET_EXTRA_LOGGING
-
#define LOG(kind,...) GNUNET_log_from (kind, "datacache-sqlite", __VA_ARGS__)
#define LOG_STRERROR_FILE(kind,op,fn) GNUNET_log_from_strerror_file (kind, "datacache-sqlite", op, fn)
* How much overhead do we assume per entry in the
* datacache?
*/
-#define OVERHEAD (sizeof(GNUNET_HashCode) + 32)
+#define OVERHEAD (sizeof(struct GNUNET_HashCode) + 32)
/**
* Context for all functions in this plugin.
* Filename used for the DB.
*/
char *fn;
+
+ /**
+ * Number of key-value pairs in the database.
+ */
+ unsigned int num_items;
};
/**
- * 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).
+ * Log an error message at log-level @a level that indicates
+ * a failure of the command @a cmd with the error from the database @a db
+ *
+ * @param db database handle
+ * @param level log level
+ * @param cmd failed command
*/
#define LOG_SQLITE(db, level, cmd) do { LOG (level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, sqlite3_errmsg(db)); } while(0)
+/**
+ * Execute SQL statement.
+ *
+ * @param db database handle
+ * @param cmd SQL command to execute
+ */
#define SQLITE3_EXEC(db, cmd) do { emsg = NULL; if (SQLITE_OK != sqlite3_exec(db, cmd, NULL, NULL, &emsg)) { LOG (GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, _("`%s' failed at %s:%d with error: %s\n"), "sqlite3_exec", __FILE__, __LINE__, emsg); sqlite3_free(emsg); } } while(0)
/**
* @brief Prepare a SQL statement
+ *
+ * @param dbh database handle
+ * @param zsql SQL statement text
+ * @param[out] ppStmt set to the prepared statement
+ * @return 0 on success
*/
static int
-sq_prepare (sqlite3 * dbh, const char *zSql, /* SQL statement, UTF-8 encoded */
- sqlite3_stmt ** ppStmt)
+sq_prepare (sqlite3 *dbh,
+ const char *zSql, /* SQL statement, UTF-8 encoded */
+ sqlite3_stmt **ppStmt)
{ /* OUT: Statement handle */
char *dummy;
- return sqlite3_prepare (dbh, zSql, strlen (zSql), ppStmt,
+ return sqlite3_prepare (dbh,
+ zSql, strlen (zSql),
+ ppStmt,
(const char **) &dummy);
}
/**
* Store an item in the datastore.
*
- * @param cls closure (our "struct Plugin")
- * @param key key to store data under
- * @param size number of bytes in data
+ * @param cls closure (our `struct Plugin`)
+ * @param key key to store @a data under
+ * @param size number of bytes in @a data
* @param data data to store
* @param type type of the value
* @param discard_time when to discard the value in any case
- * @return 0 on error, number of bytes used otherwise
+ * @param path_info_len number of entries in @a path_info
+ * @param path_info array of peers that have processed the request
+ * @return 0 if duplicate, -1 on error, number of bytes used otherwise
*/
-static size_t
-sqlite_plugin_put (void *cls, const GNUNET_HashCode * key, size_t size,
- const char *data, enum GNUNET_BLOCK_Type type,
- struct GNUNET_TIME_Absolute discard_time)
+static ssize_t
+sqlite_plugin_put (void *cls,
+ const struct GNUNET_HashCode *key,
+ size_t size,
+ const char *data,
+ enum GNUNET_BLOCK_Type type,
+ struct GNUNET_TIME_Absolute discard_time,
+ unsigned int path_info_len,
+ const struct GNUNET_PeerIdentity *path_info)
{
struct Plugin *plugin = cls;
sqlite3_stmt *stmt;
int64_t dval;
-#if DEBUG_DATACACHE_SQLITE
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Processing `%s' of %u bytes with key `%4s' and expiration %llums\n",
- "PUT", (unsigned int) size, GNUNET_h2s (key),
- (unsigned long long)
- GNUNET_TIME_absolute_get_remaining (discard_time).rel_value);
-#endif
- dval = (int64_t) discard_time.abs_value;
+ "Processing PUT of %u bytes with key `%4s' and expiration %s\n",
+ (unsigned int) size,
+ GNUNET_h2s (key),
+ GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (discard_time), GNUNET_YES));
+ dval = (int64_t) discard_time.abs_value_us;
if (dval < 0)
dval = INT64_MAX;
if (sq_prepare
(plugin->dbh,
- "INSERT INTO ds090 (type, expire, key, value) VALUES (?, ?, ?, ?)",
+ "INSERT INTO ds090 (type, expire, key, value, path) VALUES (?, ?, ?, ?, ?)",
&stmt) != SQLITE_OK)
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sq_prepare");
- return 0;
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
+ return -1;
}
if ((SQLITE_OK != sqlite3_bind_int (stmt, 1, type)) ||
(SQLITE_OK != sqlite3_bind_int64 (stmt, 2, dval)) ||
(SQLITE_OK !=
- sqlite3_bind_blob (stmt, 3, key, sizeof (GNUNET_HashCode),
+ sqlite3_bind_blob (stmt, 3,
+ key, sizeof (struct GNUNET_HashCode),
SQLITE_TRANSIENT)) ||
- (SQLITE_OK != sqlite3_bind_blob (stmt, 4, data, size, SQLITE_TRANSIENT)))
+ (SQLITE_OK != sqlite3_bind_blob (stmt, 4,
+ data, size,
+ SQLITE_TRANSIENT)) ||
+ (SQLITE_OK != sqlite3_bind_blob (stmt, 5,
+ path_info,
+ path_info_len * sizeof (struct GNUNET_PeerIdentity),
+ SQLITE_TRANSIENT)))
{
- LOG_SQLITE (plugin->dbh, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_bind_xxx");
sqlite3_finalize (stmt);
- return 0;
+ return -1;
}
if (SQLITE_DONE != sqlite3_step (stmt))
{
- LOG_SQLITE (plugin->dbh, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_step");
sqlite3_finalize (stmt);
- return 0;
+ return -1;
}
+ plugin->num_items++;
if (SQLITE_OK != sqlite3_finalize (stmt))
- LOG_SQLITE (plugin->dbh, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_finalize");
return size + OVERHEAD;
}
* Iterate over the results for a particular key
* in the datastore.
*
- * @param cls closure (our "struct Plugin")
+ * @param cls closure (our `struct Plugin`)
* @param key
* @param type entries of which type are relevant?
* @param iter maybe NULL (to just count)
- * @param iter_cls closure for iter
+ * @param iter_cls closure for @a iter
* @return the number of results found
*/
static unsigned int
-sqlite_plugin_get (void *cls, const GNUNET_HashCode * key,
- enum GNUNET_BLOCK_Type type, GNUNET_DATACACHE_Iterator iter,
+sqlite_plugin_get (void *cls,
+ const struct GNUNET_HashCode *key,
+ enum GNUNET_BLOCK_Type type,
+ GNUNET_DATACACHE_Iterator iter,
void *iter_cls)
{
struct Plugin *plugin = cls;
unsigned int cnt;
unsigned int off;
unsigned int total;
+ unsigned int psize;
char scratch[256];
int64_t ntime;
+ const struct GNUNET_PeerIdentity *path;
now = GNUNET_TIME_absolute_get ();
-#if DEBUG_DATACACHE_SQLITE
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s' for key `%4s'\n", "GET",
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Processing GET for key `%4s'\n",
GNUNET_h2s (key));
-#endif
if (sq_prepare
(plugin->dbh,
"SELECT count(*) FROM ds090 WHERE key=? AND type=? AND expire >= ?",
&stmt) != SQLITE_OK)
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sq_prepare");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
return 0;
}
- ntime = (int64_t) now.abs_value;
+ ntime = (int64_t) now.abs_value_us;
GNUNET_assert (ntime >= 0);
if ((SQLITE_OK !=
- sqlite3_bind_blob (stmt, 1, key, sizeof (GNUNET_HashCode),
+ sqlite3_bind_blob (stmt, 1, key, sizeof (struct GNUNET_HashCode),
SQLITE_TRANSIENT)) ||
(SQLITE_OK != sqlite3_bind_int (stmt, 2, type)) ||
- (SQLITE_OK != sqlite3_bind_int64 (stmt, 3, now.abs_value)))
+ (SQLITE_OK != sqlite3_bind_int64 (stmt, 3, now.abs_value_us)))
{
- LOG_SQLITE (plugin->dbh, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_bind_xxx");
sqlite3_finalize (stmt);
return 0;
LOG_SQLITE (plugin->dbh, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite_step");
sqlite3_finalize (stmt);
-#if DEBUG_DATACACHE_SQLITE
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "No content found when processing `%s' for key `%4s'\n",
- "GET", GNUNET_h2s (key));
-#endif
+ "No content found when processing GET for key `%4s'\n",
+ GNUNET_h2s (key));
return 0;
}
total = sqlite3_column_int (stmt, 0);
sqlite3_finalize (stmt);
- if ((total == 0) || (iter == NULL))
+ if ((0 == total) || (NULL == iter))
{
-#if DEBUG_DATACACHE_SQLITE
if (0 == total)
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "No content found when processing `%s' for key `%4s'\n",
- "GET", GNUNET_h2s (key));
-#endif
+ "No content found when processing GET for key `%4s'\n",
+ GNUNET_h2s (key));
return total;
}
{
off = (off + 1) % total;
GNUNET_snprintf (scratch, sizeof (scratch),
- "SELECT value,expire FROM ds090 WHERE key=? AND type=? AND expire >= ? LIMIT 1 OFFSET %u",
+ "SELECT value,expire,path FROM ds090 WHERE key=? AND type=? AND expire >= ? LIMIT 1 OFFSET %u",
off);
if (sq_prepare (plugin->dbh, scratch, &stmt) != SQLITE_OK)
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sq_prepare");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
return cnt;
}
if ((SQLITE_OK !=
- sqlite3_bind_blob (stmt, 1, key, sizeof (GNUNET_HashCode),
+ sqlite3_bind_blob (stmt, 1,
+ key,
+ sizeof (struct GNUNET_HashCode),
SQLITE_TRANSIENT)) ||
(SQLITE_OK != sqlite3_bind_int (stmt, 2, type)) ||
- (SQLITE_OK != sqlite3_bind_int64 (stmt, 3, now.abs_value)))
+ (SQLITE_OK != sqlite3_bind_int64 (stmt, 3, now.abs_value_us)))
{
- LOG_SQLITE (plugin->dbh, GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_bind_xxx");
sqlite3_finalize (stmt);
return cnt;
break;
size = sqlite3_column_bytes (stmt, 0);
dat = sqlite3_column_blob (stmt, 0);
- exp.abs_value = sqlite3_column_int64 (stmt, 1);
- ntime = (int64_t) exp.abs_value;
+ exp.abs_value_us = sqlite3_column_int64 (stmt, 1);
+ psize = sqlite3_column_bytes (stmt, 2);
+ if (0 != psize % sizeof (struct GNUNET_PeerIdentity))
+ {
+ GNUNET_break (0);
+ psize = 0;
+ }
+ psize /= sizeof (struct GNUNET_PeerIdentity);
+ if (0 != psize)
+ path = sqlite3_column_blob (stmt, 2);
+ else
+ path = NULL;
+ ntime = (int64_t) exp.abs_value_us;
if (ntime == INT64_MAX)
exp = GNUNET_TIME_UNIT_FOREVER_ABS;
cnt++;
-#if DEBUG_DATACACHE_SQLITE
- if (0 == total)
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Found %u-byte result when processing `%s' for key `%4s'\n",
- (unsigned int) size,
- "GET",
- GNUNET_h2s (key));
-#endif
-
- if (GNUNET_OK != iter (iter_cls, exp, key, size, dat, type))
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found %u-byte result when processing GET for key `%4s'\n",
+ (unsigned int) size,
+ GNUNET_h2s (key));
+ if (GNUNET_OK != iter (iter_cls,
+ key,
+ size,
+ dat,
+ type,
+ exp,
+ psize,
+ path))
{
sqlite3_finalize (stmt);
break;
* Delete the entry with the lowest expiration value
* from the datacache right now.
*
- * @param cls closure (our "struct Plugin")
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * @param cls closure (our `struct Plugin`)
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
static int
sqlite_plugin_del (void *cls)
unsigned int dsize;
sqlite3_stmt *stmt;
sqlite3_stmt *dstmt;
- GNUNET_HashCode hc;
+ struct GNUNET_HashCode hc;
-#if DEBUG_DATACACHE_SQLITE
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Processing `%s'\n", "DEL");
-#endif
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Processing DEL\n");
stmt = NULL;
dstmt = NULL;
- if (sq_prepare
- (plugin->dbh,
- "SELECT _ROWID_,key,value FROM ds090 ORDER BY expire ASC LIMIT 1",
- &stmt) != SQLITE_OK)
+ if (SQLITE_OK !=
+ sq_prepare (plugin->dbh,
+ "SELECT _ROWID_,key,value FROM ds090 ORDER BY expire ASC LIMIT 1",
+ &stmt))
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sq_prepare");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
if (stmt != NULL)
(void) sqlite3_finalize (stmt);
return GNUNET_SYSERR;
if (SQLITE_ROW != sqlite3_step (stmt))
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
(void) sqlite3_finalize (stmt);
return GNUNET_SYSERR;
}
rowid = sqlite3_column_int64 (stmt, 0);
- GNUNET_assert (sqlite3_column_bytes (stmt, 1) == sizeof (GNUNET_HashCode));
- memcpy (&hc, sqlite3_column_blob (stmt, 1), sizeof (GNUNET_HashCode));
+ GNUNET_assert (sqlite3_column_bytes (stmt, 1) == sizeof (struct GNUNET_HashCode));
+ memcpy (&hc, sqlite3_column_blob (stmt, 1), sizeof (struct GNUNET_HashCode));
dsize = sqlite3_column_bytes (stmt, 2);
if (SQLITE_OK != sqlite3_finalize (stmt))
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- if (sq_prepare
- (plugin->dbh, "DELETE FROM ds090 WHERE _ROWID_=?",
- &dstmt) != SQLITE_OK)
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ if (SQLITE_OK !=
+ sq_prepare (plugin->dbh,
+ "DELETE FROM ds090 WHERE _ROWID_=?", &dstmt))
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sq_prepare");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
if (stmt != NULL)
(void) sqlite3_finalize (stmt);
return GNUNET_SYSERR;
}
- if (SQLITE_OK !=
- sqlite3_bind_int64 (dstmt, 1, rowid))
+ if (SQLITE_OK != sqlite3_bind_int64 (dstmt, 1, rowid))
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_bind");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind");
(void) sqlite3_finalize (dstmt);
return GNUNET_SYSERR;
}
- if (sqlite3_step (dstmt) != SQLITE_DONE)
+ if (SQLITE_DONE != sqlite3_step (dstmt))
{
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
(void) sqlite3_finalize (dstmt);
return GNUNET_SYSERR;
}
- plugin->env->delete_notify (plugin->env->cls, &hc, dsize + OVERHEAD);
+ plugin->num_items--;
+ plugin->env->delete_notify (plugin->env->cls,
+ &hc,
+ dsize + OVERHEAD);
if (SQLITE_OK != sqlite3_finalize (dstmt))
LOG_SQLITE (plugin->dbh,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
- "sqlite3_finalize");
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_finalize");
return GNUNET_OK;
}
+/**
+ * Obtain a random key-value pair from the datacache.
+ *
+ * @param cls closure (our `struct Plugin`)
+ * @param iter maybe NULL (to just count)
+ * @param iter_cls closure for @a iter
+ * @return the number of results found, zero (datacache empty) or one
+ */
+static unsigned int
+sqlite_plugin_get_random (void *cls,
+ GNUNET_DATACACHE_Iterator iter,
+ void *iter_cls)
+{
+ struct Plugin *plugin = cls;
+ sqlite3_stmt *stmt;
+ struct GNUNET_TIME_Absolute exp;
+ unsigned int size;
+ const char *dat;
+ unsigned int off;
+ unsigned int psize;
+ unsigned int type;
+ char scratch[256];
+ int64_t ntime;
+ const struct GNUNET_PeerIdentity *path;
+ const struct GNUNET_HashCode *key;
+
+ if (0 == plugin->num_items)
+ return 0;
+ if (NULL == iter)
+ return 1;
+ off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
+ plugin->num_items);
+ GNUNET_snprintf (scratch,
+ sizeof (scratch),
+ "SELECT value,expire,path,key,type FROM ds090 ORDER BY key LIMIT 1 OFFSET %u",
+ off);
+ if (SQLITE_OK !=
+ sq_prepare (plugin->dbh, scratch, &stmt))
+ {
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
+ return 0;
+ }
+ if (SQLITE_ROW != sqlite3_step (stmt))
+ {
+ GNUNET_break (0);
+ sqlite3_finalize (stmt);
+ return 0;
+ }
+ size = sqlite3_column_bytes (stmt, 0);
+ dat = sqlite3_column_blob (stmt, 0);
+ exp.abs_value_us = sqlite3_column_int64 (stmt, 1);
+ psize = sqlite3_column_bytes (stmt, 2);
+ if (0 != psize % sizeof (struct GNUNET_PeerIdentity))
+ {
+ GNUNET_break (0);
+ psize = 0;
+ }
+ psize /= sizeof (struct GNUNET_PeerIdentity);
+ if (0 != psize)
+ path = sqlite3_column_blob (stmt, 2);
+ else
+ path = NULL;
+
+ GNUNET_assert (sizeof (struct GNUNET_HashCode) ==
+ sqlite3_column_bytes (stmt, 3));
+ key = sqlite3_column_blob (stmt, 3);
+ type = sqlite3_column_int (stmt, 4);
+
+ ntime = (int64_t) exp.abs_value_us;
+ if (ntime == INT64_MAX)
+ exp = GNUNET_TIME_UNIT_FOREVER_ABS;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found %u-byte result with key %s when processing GET-RANDOM\n",
+ (unsigned int) size,
+ GNUNET_h2s (key));
+ (void) iter (iter_cls,
+ key,
+ size,
+ dat,
+ type,
+ exp,
+ psize,
+ path);
+ sqlite3_finalize (stmt);
+ return 1;
+}
+
+
+/**
+ * Iterate over the results that are "close" to a particular key in
+ * the datacache. "close" is defined as numerically larger than @a
+ * key (when interpreted as a circular address space), with small
+ * distance.
+ *
+ * @param cls closure (internal context for the plugin)
+ * @param key area of the keyspace to look into
+ * @param num_results number of results that should be returned to @a iter
+ * @param iter maybe NULL (to just count)
+ * @param iter_cls closure for @a iter
+ * @return the number of results found
+ */
+static unsigned int
+sqlite_plugin_get_closest (void *cls,
+ const struct GNUNET_HashCode *key,
+ unsigned int num_results,
+ GNUNET_DATACACHE_Iterator iter,
+ void *iter_cls)
+{
+ struct Plugin *plugin = cls;
+ sqlite3_stmt *stmt;
+ struct GNUNET_TIME_Absolute now;
+ struct GNUNET_TIME_Absolute exp;
+ unsigned int size;
+ const char *dat;
+ unsigned int cnt;
+ unsigned int psize;
+ unsigned int type;
+ int64_t ntime;
+ const struct GNUNET_PeerIdentity *path;
+
+ now = GNUNET_TIME_absolute_get ();
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Processing GET_CLOSEST for key `%4s'\n",
+ GNUNET_h2s (key));
+ if (SQLITE_OK !=
+ sq_prepare (plugin->dbh,
+ "SELECT value,expire,path,type,key FROM ds090 WHERE key>=? AND expire >= ? ORDER BY KEY ASC LIMIT ?",
+ &stmt))
+ {
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sq_prepare");
+ return 0;
+ }
+ ntime = (int64_t) now.abs_value_us;
+ GNUNET_assert (ntime >= 0);
+ if ((SQLITE_OK !=
+ sqlite3_bind_blob (stmt,
+ 1,
+ key,
+ sizeof (struct GNUNET_HashCode),
+ SQLITE_TRANSIENT)) ||
+ (SQLITE_OK != sqlite3_bind_int64 (stmt, 2, now.abs_value_us)) ||
+ (SQLITE_OK != sqlite3_bind_int (stmt, 3, num_results)) )
+ {
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_bind_xxx");
+ sqlite3_finalize (stmt);
+ return 0;
+ }
+ cnt = 0;
+ while (SQLITE_ROW == sqlite3_step (stmt))
+ {
+ if (sizeof (struct GNUNET_HashCode) !=
+ sqlite3_column_bytes (stmt, 4))
+ {
+ GNUNET_break (0);
+ break;
+ }
+ size = sqlite3_column_bytes (stmt, 0);
+ dat = sqlite3_column_blob (stmt, 0);
+ exp.abs_value_us = sqlite3_column_int64 (stmt, 1);
+ psize = sqlite3_column_bytes (stmt, 2);
+ type = sqlite3_column_int (stmt, 3);
+ key = sqlite3_column_blob (stmt, 4);
+ if (0 != psize % sizeof (struct GNUNET_PeerIdentity))
+ {
+ GNUNET_break (0);
+ psize = 0;
+ }
+ psize /= sizeof (struct GNUNET_PeerIdentity);
+ if (0 != psize)
+ path = sqlite3_column_blob (stmt, 2);
+ else
+ path = NULL;
+ ntime = (int64_t) exp.abs_value_us;
+ if (ntime == INT64_MAX)
+ exp = GNUNET_TIME_UNIT_FOREVER_ABS;
+ cnt++;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Found %u-byte result at %s when processing GET_CLOSE\n",
+ (unsigned int) size,
+ GNUNET_h2s (key));
+ if (GNUNET_OK != iter (iter_cls,
+ key,
+ size,
+ dat,
+ type,
+ exp,
+ psize,
+ path))
+ {
+ sqlite3_finalize (stmt);
+ break;
+ }
+ }
+ sqlite3_finalize (stmt);
+ return cnt;
+}
+
+
/**
* Entry point for the plugin.
*
- * @param cls closure (the "struct GNUNET_DATACACHE_PluginEnvironmnet")
- * @return the plugin's closure (our "struct Plugin")
+ * @param cls closure (the `struct GNUNET_DATACACHE_PluginEnvironment`)
+ * @return the plugin's closure (our `struct Plugin`)
*/
void *
libgnunet_plugin_datacache_sqlite_init (void *cls)
sqlite3 *dbh;
char *emsg;
- fn = GNUNET_DISK_mktemp ("gnunet-datacache");
- if (fn == NULL)
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ "datacache-sqlite",
+ "IN_MEMORY"))
{
- GNUNET_break (0);
- return NULL;
+ if (SQLITE_OK != sqlite3_open (":memory:", &dbh))
+ return NULL;
+ fn_utf8 = NULL;
}
-#ifdef ENABLE_NLS
- fn_utf8 = GNUNET_STRINGS_to_utf8 (fn, strlen (fn), nl_langinfo (CODESET));
-#else
- /* good luck */
- fn_utf8 = GNUNET_STRINGS_to_utf8 (fn, strlen (fn), "UTF-8");
-#endif
- if (SQLITE_OK != sqlite3_open (fn_utf8, &dbh))
+ else
{
+ fn = GNUNET_DISK_mktemp ("gnunet-datacache");
+ if (fn == NULL)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ /* fn should be UTF-8-encoded. If it isn't, it's a bug. */
+ fn_utf8 = GNUNET_strdup (fn);
+ if (SQLITE_OK != sqlite3_open (fn_utf8, &dbh))
+ {
+ GNUNET_free (fn);
+ GNUNET_free (fn_utf8);
+ return NULL;
+ }
GNUNET_free (fn);
- GNUNET_free (fn_utf8);
- return NULL;
}
- GNUNET_free (fn);
SQLITE3_EXEC (dbh, "PRAGMA temp_store=MEMORY");
SQLITE3_EXEC (dbh, "PRAGMA locking_mode=EXCLUSIVE");
SQLITE3_EXEC (dbh, "PRAGMA journal_mode=OFF");
SQLITE3_EXEC (dbh, "PRAGMA synchronous=OFF");
- SQLITE3_EXEC (dbh, "PRAGMA count_changes=OFF");
SQLITE3_EXEC (dbh, "PRAGMA page_size=4092");
+ if (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (env->cfg,
+ "datacache-sqlite",
+ "IN_MEMORY"))
+ SQLITE3_EXEC (dbh, "PRAGMA sqlite_temp_store=3");
+
SQLITE3_EXEC (dbh,
"CREATE TABLE ds090 (" " type INTEGER NOT NULL DEFAULT 0,"
" expire INTEGER NOT NULL DEFAULT 0,"
" key BLOB NOT NULL DEFAULT '',"
- " value BLOB NOT NULL DEFAULT '')");
+ " value BLOB NOT NULL DEFAULT '',"
+ " path BLOB DEFAULT '')");
SQLITE3_EXEC (dbh, "CREATE INDEX idx_hashidx ON ds090 (key,type,expire)");
SQLITE3_EXEC (dbh, "CREATE INDEX idx_expire ON ds090 (expire)");
- plugin = GNUNET_malloc (sizeof (struct Plugin));
+ plugin = GNUNET_new (struct Plugin);
plugin->env = env;
plugin->dbh = dbh;
plugin->fn = fn_utf8;
- api = GNUNET_malloc (sizeof (struct GNUNET_DATACACHE_PluginFunctions));
+ api = GNUNET_new (struct GNUNET_DATACACHE_PluginFunctions);
api->cls = plugin;
api->get = &sqlite_plugin_get;
api->put = &sqlite_plugin_put;
api->del = &sqlite_plugin_del;
- LOG (GNUNET_ERROR_TYPE_INFO,
- _("Sqlite datacache running\n"));
+ api->get_random = &sqlite_plugin_get_random;
+ api->get_closest = &sqlite_plugin_get_closest;
+ LOG (GNUNET_ERROR_TYPE_INFO,
+ "Sqlite datacache running\n");
return api;
}
/**
* Exit point from the plugin.
*
- * @param cls closure (our "struct Plugin")
+ * @param cls closure (our `struct Plugin`)
* @return NULL
*/
void *
#endif
#if !WINDOWS || defined(__CYGWIN__)
- if (0 != UNLINK (plugin->fn))
- LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "unlink", plugin->fn);
- GNUNET_free (plugin->fn);
+ if ( (NULL != plugin->fn) &&
+ (0 != UNLINK (plugin->fn)) )
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING,
+ "unlink",
+ plugin->fn);
+ GNUNET_free_non_null (plugin->fn);
#endif
result = sqlite3_close (plugin->dbh);
#if SQLITE_VERSION_NUMBER >= 3007000
- if (result == SQLITE_BUSY)
+ if (SQLITE_BUSY == result)
{
LOG (GNUNET_ERROR_TYPE_WARNING,
- _("Tried to close sqlite without finalizing all prepared statements.\n"));
+ _("Tried to close sqlite without finalizing all prepared statements.\n"));
stmt = sqlite3_next_stmt (plugin->dbh, NULL);
- while (stmt != NULL)
+ while (NULL != stmt)
{
-#if DEBUG_SQLITE
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Closing statement %p\n", stmt);
-#endif
result = sqlite3_finalize (stmt);
-#if DEBUG_SQLITE
if (result != SQLITE_OK)
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to close statement %p: %d\n", stmt, result);
-#endif
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "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->dbh, GNUNET_ERROR_TYPE_ERROR, "sqlite3_close");
+ LOG_SQLITE (plugin->dbh,
+ GNUNET_ERROR_TYPE_ERROR,
+ "sqlite3_close");
#if WINDOWS && !defined(__CYGWIN__)
- if (0 != UNLINK (plugin->fn))
- LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "unlink", plugin->fn);
- GNUNET_free (plugin->fn);
+ if ( (NULL != plugin->fn) &&
+ (0 != UNLINK (plugin->fn)) )
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING,
+ "unlink",
+ plugin->fn);
+ GNUNET_free_non_null (plugin->fn);
#endif
GNUNET_free (plugin);
GNUNET_free (api);
projects / oweals / gnunet.git / blobdiff