#include "gnunet_datastore_plugin.h"
#include <sqlite3.h>
+/**
+ * Enable or disable logging debug messages.
+ */
#define DEBUG_SQLITE GNUNET_NO
-
/**
- * 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).
+ * 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 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_NON_ANONYMOUS_1 \
- "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090 WHERE (prio = ?1 AND expire > %llu AND anonLevel = 0 AND hash < ?2) "\
- " ORDER BY hash DESC LIMIT 1"
-
-#define SELECT_IT_NON_ANONYMOUS_2 \
- "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090 WHERE (prio < ?1 AND expire > %llu AND anonLevel = 0)"\
- " ORDER BY prio DESC, hash DESC LIMIT 1"
-
-
-#define SELECT_IT_REPLICATION_ORDER \
- "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090 WHERE (expire > ?1) "\
- " ORDER BY repl DESC, Random() LIMIT 1"
-
-#define SELECT_IT_EXPIRATION_ORDER \
- "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090 WHERE (expire < ?1) "\
- " OR NOT EXISTS (SELECT 1 from gn090 WHERE (expire < ?1)) "\
- " ORDER BY prio ASC LIMIT 1"
-
+#define MAX_ITEM_SIZE 65536
/**
* After how many ms "busy" should a DB operation fail for good?
#define BUSY_TIMEOUT_MS 250
+/**
+ * Log an error message at log-level 'level' that indicates
+ * a failure of the command 'cmd' on file 'filename'
+ * with the message given by strerror(errno).
+ */
+#define LOG_SQLITE(db, msg, level, cmd) do { GNUNET_log_from (level, "sqlite", _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, sqlite3_errmsg(db->dbh)); if (msg != NULL) GNUNET_asprintf(msg, _("`%s' failed at %s:%u with error: %s"), cmd, __FILE__, __LINE__, sqlite3_errmsg(db->dbh)); } while(0)
+
+
/**
* Context for all functions in this plugin.
{
char *dummy;
int result;
+
result = sqlite3_prepare_v2 (dbh,
zSql,
strlen (zSql),
ppStmt,
(const char **) &dummy);
-#if DEBUG_SQLITE
+#if DEBUG_SQLITE && 0
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"sqlite",
- "Prepared %p: %d\n",
+ "Prepared `%s' / %p: %d\n",
+ zSql,
*ppStmt,
result);
#endif
/* create indices */
sqlite3_exec (dbh,
"CREATE INDEX idx_hash ON gn090 (hash)", NULL, NULL, NULL);
- sqlite3_exec (dbh, "CREATE INDEX idx_prio ON gn090 (prio)", NULL, NULL,
- NULL);
- sqlite3_exec (dbh, "CREATE INDEX idx_expire_prio ON gn090 (expire,prio)", NULL, NULL,
- NULL);
sqlite3_exec (dbh,
"CREATE INDEX idx_hash_vhash ON gn090 (hash,vhash)", NULL,
NULL, NULL);
- sqlite3_exec (dbh, "CREATE INDEX idx_comb ON gn090 (prio,expire,anonLevel,hash)",
+ sqlite3_exec (dbh, "CREATE INDEX idx_expire_repl ON gn090 (expire ASC,repl DESC)", NULL, NULL,
+ NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_comb ON gn090 (anonLevel ASC,expire ASC,prio,type,hash)",
+ NULL, NULL, NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_expire ON gn090 (expire)",
+ NULL, NULL, NULL);
+ sqlite3_exec (dbh, "CREATE INDEX idx_repl ON gn090 (repl)",
NULL, NULL, NULL);
}
-
#if 0
#define CHECK(a) GNUNET_break(a)
#define ENULL NULL
#endif
-
-
/**
* Initialize the database connections and associated
* data structures (create tables and indices
CHECK (SQLITE_OK ==
sqlite3_exec (plugin->dbh,
"PRAGMA synchronous=OFF", NULL, NULL, ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh,
+ "PRAGMA legacy_file_format=OFF", NULL, NULL, ENULL));
CHECK (SQLITE_OK ==
sqlite3_exec (plugin->dbh,
"PRAGMA auto_vacuum=INCREMENTAL", NULL, NULL, ENULL));
+ CHECK (SQLITE_OK ==
+ sqlite3_exec (plugin->dbh,
+ "PRAGMA locking_mode=EXCLUSIVE", NULL, NULL, ENULL));
CHECK (SQLITE_OK ==
sqlite3_exec (plugin->dbh,
"PRAGMA count_changes=OFF", NULL, NULL, ENULL));
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 gn090 SET prio = prio + ?, expire = MAX(expire,?) WHERE "
- "_ROWID_ = ?",
+ "UPDATE gn090 SET prio = prio + ?, expire = MAX(expire,?) WHERE _ROWID_ = ?",
&plugin->updPrio) != SQLITE_OK) ||
(sq_prepare (plugin->dbh,
- "UPDATE gn090 SET repl = MAX (0, repl - 1) WHERE "
- "_ROWID_ = ?",
+ "UPDATE gn090 SET repl = MAX (0, repl - 1) WHERE _ROWID_ = ?",
&plugin->updRepl) != SQLITE_OK) ||
(sq_prepare (plugin->dbh,
- SELECT_IT_REPLICATION_ORDER,
+ "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090"
+ " ORDER BY repl DESC, Random() LIMIT 1",
&plugin->selRepl) != SQLITE_OK) ||
(sq_prepare (plugin->dbh,
- SELECT_IT_EXPIRATION_ORDER,
+ "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090 "
+ " WHERE NOT EXISTS (SELECT 1 FROM gn090 WHERE expire < ?1 LIMIT 1) OR expire < ?1 "
+ " ORDER BY prio ASC LIMIT 1",
&plugin->selExpi) != SQLITE_OK) ||
(sq_prepare (plugin->dbh,
"INSERT INTO gn090 (repl, type, prio, "
- "anonLevel, expire, hash, vhash, value) VALUES "
- "(?, ?, ?, ?, ?, ?, ?, ?)",
+ "anonLevel, expire, hash, vhash, value) "
+ "VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
&plugin->insertContent) != SQLITE_OK) ||
(sq_prepare (plugin->dbh,
"DELETE FROM gn090 WHERE _ROWID_ = ?",
/**
* Continuation of "sqlite_next_request".
*
- * @param cls the next context
+ * @param cls the 'struct NextContext*'
* @param tc the task context (unused)
*/
static void
unsigned long long rowid;
int ret;
unsigned int size;
+ unsigned int hsize;
uint32_t anonymity;
uint32_t priority;
enum GNUNET_BLOCK_Type type;
const GNUNET_HashCode *key;
struct GNUNET_TIME_Absolute expiration;
- char data[GNUNET_SERVER_MAX_MESSAGE_SIZE];
plugin = nc->plugin;
plugin->next_task = GNUNET_SCHEDULER_NO_TASK;
(GNUNET_OK != (nc->prep(nc->prep_cls,
nc))) )
{
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "sqlite",
+ "Iteration completes after %u results\n",
+ nc->count);
+#endif
END:
nc->iter (nc->iter_cls,
NULL, NULL, 0, NULL, 0, 0, 0,
priority = sqlite3_column_int (nc->stmt, 1);
anonymity = sqlite3_column_int (nc->stmt, 2);
expiration.abs_value = sqlite3_column_int64 (nc->stmt, 3);
+ hsize = sqlite3_column_bytes (nc->stmt, 4);
key = sqlite3_column_blob (nc->stmt, 4);
size = sqlite3_column_bytes (nc->stmt, 5);
- memcpy (data, sqlite3_column_blob (nc->stmt, 5), size);
rowid = sqlite3_column_int64 (nc->stmt, 6);
- if (sqlite3_column_bytes (nc->stmt, 4) != sizeof (GNUNET_HashCode))
+ if (hsize != sizeof (GNUNET_HashCode))
{
- GNUNET_log_from (GNUNET_ERROR_TYPE_WARNING,
- "sqlite",
- _("Invalid data in database. Trying to fix (by deletion).\n"));
+ GNUNET_break (0);
if (SQLITE_OK != sqlite3_reset (nc->stmt))
LOG_SQLITE (plugin, NULL,
GNUNET_ERROR_TYPE_ERROR |
- (size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
goto END;
}
- nc->count++;
- nc->last_rowid = rowid;
- nc->lastPriority = priority;
- nc->lastKey = *key;
- if (SQLITE_OK != sqlite3_reset (nc->stmt))
- LOG_SQLITE (plugin, NULL,
- GNUNET_ERROR_TYPE_ERROR |
- GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
- ret = nc->iter (nc->iter_cls, nc,
- key,
- size, data,
- type, priority,
- anonymity, expiration,
- rowid);
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "sqlite",
+ "Iterator returns value 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
+ if (size > MAX_ITEM_SIZE)
+ {
+ GNUNET_break (0);
+ if (SQLITE_OK != sqlite3_reset (nc->stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
+ if (GNUNET_OK == delete_by_rowid (plugin, rowid))
+ plugin->env->duc (plugin->env->cls,
+ - (size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
+ goto END;
+ }
+ {
+ char data[size];
+
+ memcpy (data, sqlite3_column_blob (nc->stmt, 5), size);
+ nc->count++;
+ nc->last_rowid = rowid;
+ nc->lastPriority = priority;
+ nc->lastKey = *key;
+ if (SQLITE_OK != sqlite3_reset (nc->stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
+ ret = nc->iter (nc->iter_cls, nc,
+ &nc->lastKey,
+ size, data,
+ type, priority,
+ anonymity, expiration,
+ rowid);
+ }
switch (ret)
{
case GNUNET_SYSERR:
nc->end_it = GNUNET_YES;
break;
case GNUNET_NO:
-#if DEBUG_SQLITE
- 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 (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",
(unsigned long long) rowid,
size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
#endif
+ plugin->env->duc (plugin->env->cls,
+ - (size + GNUNET_DATASTORE_ENTRY_OVERHEAD));
}
break;
case GNUNET_YES:
/**
- * Function invoked on behalf of a "PluginIterator"
- * asking the database plugin to call the iterator
- * with the next item.
+ * 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".
{
struct Plugin *plugin = cls;
int n;
+ int ret;
sqlite3_stmt *stmt;
GNUNET_HashCode vhash;
+ if (size > MAX_ITEM_SIZE)
+ return GNUNET_SYSERR;
#if DEBUG_SQLITE
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"sqlite",
switch (n)
{
case SQLITE_DONE:
- 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
"Stored new entry (%u bytes)\n",
size + GNUNET_DATASTORE_ENTRY_OVERHEAD);
#endif
- return GNUNET_OK;
+ ret = GNUNET_OK;
+ break;
case SQLITE_BUSY:
GNUNET_break (0);
LOG_SQLITE (plugin, msg,
GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_step");
- sqlite3_reset (stmt);
- return GNUNET_SYSERR;
+ ret = GNUNET_SYSERR;
+ break;
default:
LOG_SQLITE (plugin, msg,
GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_step");
- sqlite3_reset (stmt);
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
database_shutdown (plugin);
database_setup (plugin->env->cfg,
plugin);
return GNUNET_SYSERR;
}
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
+ return ret;
}
/**
* Internal context for an iteration.
*/
-struct IterContext
+struct ZeroIterContext
{
/**
- * FIXME.
+ * First iterator statement for zero-anonymity iteration.
*/
sqlite3_stmt *stmt_1;
/**
- * FIXME.
+ * Second iterator statement for zero-anonymity iteration.
*/
sqlite3_stmt *stmt_2;
/**
* Prepare our SQL query to obtain the next record from the database.
*
- * @param cls our "struct IterContext"
+ * @param cls our "struct ZeroIterContext"
* @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)
+zero_iter_next_prepare (void *cls,
+ struct NextContext *nc)
{
- struct IterContext *ic = cls;
+ struct ZeroIterContext *ic = cls;
struct Plugin *plugin;
int ret;
sqlite3_finalize (ic->stmt_2);
return GNUNET_SYSERR;
}
- sqlite3_reset (ic->stmt_1);
- sqlite3_reset (ic->stmt_2);
plugin = nc->plugin;
+
+ /* first try iter 1 */
#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);
-#if DEBUG_SQLITE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Restricting to results larger than the last key `%s'\n",
- GNUNET_h2s(&nc->lastKey));
+ "Restricting to results larger than the last priority %u and key `%s'\n",
+ nc->lastPriority,
+ GNUNET_h2s (&nc->lastKey));
#endif
- sqlite3_bind_blob (ic->stmt_1, 2,
- &nc->lastKey,
- sizeof (GNUNET_HashCode),
- SQLITE_TRANSIENT);
+ if ( (SQLITE_OK != sqlite3_bind_int (ic->stmt_1, 1, nc->lastPriority)) ||
+ (SQLITE_OK != sqlite3_bind_blob (ic->stmt_1, 2,
+ &nc->lastKey,
+ sizeof (GNUNET_HashCode),
+ SQLITE_TRANSIENT)) )
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, "sqlite3_bind_XXXX");
+ if (SQLITE_OK != sqlite3_reset (ic->stmt_1))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
+ return GNUNET_SYSERR;
+ }
if (SQLITE_ROW == (ret = sqlite3_step (ic->stmt_1)))
{
#if DEBUG_SQLITE
GNUNET_ERROR_TYPE_ERROR |
GNUNET_ERROR_TYPE_BULK,
"sqlite3_step");
+ if (SQLITE_OK != sqlite3_reset (ic->stmt_1))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
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");
+ "sqlite3_reset");
+
+ /* now try iter 2 */
+ if (SQLITE_OK != sqlite3_bind_int (ic->stmt_2, 1, nc->lastPriority))
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, "sqlite3_bind_XXXX");
+ return GNUNET_SYSERR;
+ }
if (SQLITE_ROW == (ret = sqlite3_step (ic->stmt_2)))
{
#if DEBUG_SQLITE
GNUNET_ERROR_TYPE_ERROR |
GNUNET_ERROR_TYPE_BULK,
"sqlite3_step");
+ if (SQLITE_OK != sqlite3_reset (ic->stmt_2))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
return GNUNET_SYSERR;
}
if (SQLITE_OK != sqlite3_reset (ic->stmt_2))
struct Plugin *plugin = cls;
struct GNUNET_TIME_Absolute now;
struct NextContext *nc;
- struct IterContext *ic;
+ struct ZeroIterContext *ic;
sqlite3_stmt *stmt_1;
sqlite3_stmt *stmt_2;
char *q;
+ GNUNET_assert (type != GNUNET_BLOCK_TYPE_ANY);
now = GNUNET_TIME_absolute_get ();
- GNUNET_asprintf (&q, SELECT_IT_NON_ANONYMOUS_1,
- (unsigned long long) now.abs_value);
+ GNUNET_asprintf (&q,
+ "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090 "
+ "WHERE (anonLevel = 0 AND expire > %llu AND prio = ?1 AND type=%d AND hash < ?2) "
+ "ORDER BY hash DESC LIMIT 1",
+ (unsigned long long) now.abs_value,
+ type);
if (sq_prepare (plugin->dbh, q, &stmt_1) != SQLITE_OK)
{
LOG_SQLITE (plugin, NULL,
return;
}
GNUNET_free (q);
- GNUNET_asprintf (&q, SELECT_IT_NON_ANONYMOUS_2,
- (unsigned long long) now.abs_value);
+ GNUNET_asprintf (&q,
+ "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090 "
+ "WHERE (anonLevel = 0 AND expire > %llu AND prio < ?1 AND type=%d) "
+ "ORDER BY prio DESC, hash DESC LIMIT 1",
+ (unsigned long long) now.abs_value,
+ type);
if (sq_prepare (plugin->dbh, q, &stmt_2) != SQLITE_OK)
{
LOG_SQLITE (plugin, NULL,
}
GNUNET_free (q);
nc = GNUNET_malloc (sizeof(struct NextContext) +
- sizeof(struct IterContext));
+ sizeof(struct ZeroIterContext));
nc->plugin = plugin;
nc->iter = iter;
nc->iter_cls = iter_cls;
nc->stmt = NULL;
- ic = (struct IterContext*) &nc[1];
+ ic = (struct ZeroIterContext*) &nc[1];
ic->stmt_1 = stmt_1;
ic->stmt_2 = stmt_2;
ic->type = type;
- nc->prep = &iter_next_prepare;
+ nc->prep = &zero_iter_next_prepare;
nc->prep_cls = ic;
- nc->lastPriority = 0x7FFFFFFF;
+ nc->lastPriority = INT32_MAX;
memset (&nc->lastKey, 255, sizeof (GNUNET_HashCode));
sqlite_next_request (nc, GNUNET_NO);
}
/**
- * Call sqlite using the already prepared query to get
- * the next result.
- *
- * @param cls context with the prepared query
- * @param nc context with the prepared query
- * @return GNUNET_OK on success, GNUNET_SYSERR on error, GNUNET_NO if
- * there are no more results
+ * Context for get_next_prepare.
*/
-static int
-all_next_prepare (void *cls,
- struct NextContext *nc)
+struct GetNextContext
{
- 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
- nc = (struct NextContext *)cls;
- if (nc->stmt)
- sqlite3_finalize (nc->stmt);
- nc->stmt = NULL;
- return GNUNET_SYSERR;
- }
- plugin = nc->plugin;
- ret = sqlite3_step (nc->stmt);
- switch (ret)
- {
- case SQLITE_ROW:
- return GNUNET_OK;
- case SQLITE_DONE:
- return GNUNET_NO;
- default:
- LOG_SQLITE (plugin, NULL,
- GNUNET_ERROR_TYPE_ERROR |
- GNUNET_ERROR_TYPE_BULK,
- "sqlite3_step");
- return GNUNET_SYSERR;
- }
-}
-
-/**
- * Select a subset of the items in the datastore and call
- * the given iterator for each of them.
- *
- * @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;
- * will be called once with a NULL value at the end
- * @param iter_cls closure for iter
- */
-static void
-sqlite_plugin_iter_all_now (void *cls,
- enum GNUNET_BLOCK_Type type,
- PluginIterator iter,
- void *iter_cls)
-{
- struct Plugin *plugin = cls;
- struct NextContext *nc;
+ /**
+ * Our prepared statement.
+ */
sqlite3_stmt *stmt;
- if (sq_prepare (plugin->dbh,
- "SELECT type,prio,anonLevel,expire,hash,value,_ROWID_ FROM gn090",
- &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 = nc;
- sqlite_next_request (nc, GNUNET_NO);
-}
-
-
-/**
- * FIXME.
- */
-struct GetNextContext
-{
-
/**
- * FIXME.
+ * Plugin handle.
*/
- int total;
+ struct Plugin *plugin;
/**
- * FIXME.
+ * Key for the query.
*/
- int off;
+ GNUNET_HashCode key;
/**
- * FIXME.
+ * Vhash for the query.
*/
- int have_vhash;
+ GNUNET_HashCode vhash;
/**
- * FIXME.
+ * Expected total number of results.
*/
- unsigned int type;
+ unsigned int total;
/**
- * FIXME.
+ * Offset to add for the selected result.
*/
- sqlite3_stmt *stmt;
+ unsigned int off;
/**
- * FIXME.
+ * Is vhash set?
*/
- GNUNET_HashCode key;
+ int have_vhash;
/**
- * FIXME.
+ * Desired block type.
*/
- GNUNET_HashCode vhash;
-};
+ enum GNUNET_BLOCK_Type type;
+};
/**
- * FIXME.
+ * Prepare the stmt in 'nc' for the next round of execution, selecting the
+ * next return value.
*
* @param cls our "struct GetNextContext*"
- * @param nc FIXME
+ * @param nc the general context
* @return GNUNET_YES if there are more results,
* GNUNET_NO if there are no more results,
* GNUNET_SYSERR on internal error
struct NextContext *nc)
{
struct GetNextContext *gnc = cls;
- int sqoff;
int ret;
int limit_off;
+ unsigned int sqoff;
if (nc == NULL)
{
limit_off = gnc->off;
else
limit_off = 0;
- sqoff = 1;
sqlite3_reset (nc->stmt);
+ sqoff = 1;
ret = sqlite3_bind_blob (nc->stmt,
sqoff++,
&gnc->key,
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);
+ ret = sqlite3_bind_int64 (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;
+#if DEBUG_SQLITE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
+ "sqlite",
+ "Preparing to GET for key `%s' with type %d at offset %u\n",
+ GNUNET_h2s (&gnc->key),
+ gnc->type,
+ limit_off);
+#endif
+ ret = sqlite3_step (nc->stmt);
+ switch (ret)
+ {
+ case SQLITE_ROW:
+ return GNUNET_OK;
+ case SQLITE_DONE:
+ return GNUNET_NO;
+ default:
+ LOG_SQLITE (gnc->plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_step");
+ return GNUNET_SYSERR;
+ }
}
* in the datastore.
*
* @param cls closure
- * @param key maybe NULL (to match all entries)
+ * @param key key to match, never NULL
* @param vhash hash of the value, maybe NULL (to
* match all values that have the right key).
* Note that for DBlocks there is no difference
*/
static void
sqlite_plugin_get (void *cls,
- const GNUNET_HashCode * key,
- const GNUNET_HashCode * vhash,
+ 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 GetNextContext *gnc;
struct NextContext *nc;
int ret;
int total;
sqlite3_stmt *stmt;
char scratch[256];
- int sqoff;
+ unsigned int sqoff;
GNUNET_assert (iter != NULL);
- if (key == NULL)
- {
- sqlite_plugin_iter_all_now (cls, type, iter, iter_cls);
- return;
- }
+ GNUNET_assert (key != NULL);
GNUNET_snprintf (scratch, sizeof (scratch),
- "SELECT count(*) FROM gn090 WHERE hash=:1%s%s",
- vhash == NULL ? "" : " AND vhash=:2",
- type == 0 ? "" : (vhash ==
- NULL) ? " AND type=:2" : " AND type=:3");
+ "SELECT count(*) FROM gn090 WHERE hash=?%s%s",
+ vhash == NULL ? "" : " AND vhash=?",
+ type == 0 ? "" : " AND type=?");
if (sq_prepare (plugin->dbh, scratch, &stmt) != SQLITE_OK)
{
LOG_SQLITE (plugin, NULL,
return;
}
sqoff = 1;
- ret = sqlite3_bind_blob (stmt,
- sqoff++,
+ ret = sqlite3_bind_blob (stmt, sqoff++,
key, sizeof (GNUNET_HashCode), SQLITE_TRANSIENT);
if ((vhash != NULL) && (ret == SQLITE_OK))
- ret = sqlite3_bind_blob (stmt,
- sqoff++,
+ ret = sqlite3_bind_blob (stmt, sqoff++,
vhash,
sizeof (GNUNET_HashCode), SQLITE_TRANSIENT);
if ((type != 0) && (ret == SQLITE_OK))
{
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;
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 type, prio, anonLevel, expire, hash, value, _ROWID_ "
- "FROM gn090 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);
+ "FROM gn090 WHERE hash=?%s%s "
+ "ORDER BY _ROWID_ ASC LIMIT 1 OFFSET ?",
+ vhash == NULL ? "" : " AND vhash=?",
+ type == 0 ? "" : " AND type=?");
+
if (sq_prepare (plugin->dbh, scratch, &stmt) != SQLITE_OK)
{
LOG_SQLITE (plugin, NULL,
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! */
+ gnc = (struct GetNextContext*) &nc[1];
+ gnc->total = total;
+ gnc->type = type;
+ gnc->key = *key;
+ gnc->plugin = plugin;
+ gnc->stmt = stmt; /* alias used for freeing at the end! */
if (NULL != vhash)
{
- gpc->have_vhash = GNUNET_YES;
- gpc->vhash = *vhash;
+ gnc->have_vhash = GNUNET_YES;
+ gnc->vhash = *vhash;
}
- gpc->off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, total);
+ gnc->off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, total);
nc->prep = &get_next_prepare;
- nc->prep_cls = gpc;
+ nc->prep_cls = gnc;
sqlite_next_request (nc, GNUNET_NO);
}
/**
- * Execute statement that gets a row and call the iterator
+ * Execute statement that gets a row and call the callback
* with the result. Resets the statement afterwards.
*
* @param plugin the plugin
LOG_SQLITE (plugin, NULL,
GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK,
"sqlite3_step");
- (void) sqlite3_reset (stmt);
+ if (SQLITE_OK != sqlite3_reset (stmt))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK,
+ "sqlite3_reset");
GNUNET_break (0);
database_shutdown (plugin);
database_setup (plugin->env->cfg,
/**
- * Get a random item for replication. Returns a single, not expired, random item
+ * Context for 'repl_iter' function.
+ */
+struct ReplCtx
+{
+
+ /**
+ * Plugin handle.
+ */
+ struct Plugin *plugin;
+
+ /**
+ * Function to call for the result (or the NULL).
+ */
+ PluginIterator iter;
+
+ /**
+ * Closure for iter.
+ */
+ void *iter_cls;
+};
+
+
+/**
+ * Wrapper for the iterator for 'sqlite_plugin_replication_get'.
+ * Decrements the replication counter and calls the original
+ * iterator.
+ *
+ * @param cls closure
+ * @param next_cls closure to pass to the "next" function.
+ * @param key key for the content
+ * @param size number of bytes in data
+ * @param data content stored
+ * @param type type of the content
+ * @param priority priority of the content
+ * @param anonymity anonymity-level for the content
+ * @param expiration expiration time for the content
+ * @param uid unique identifier for the datum;
+ * maybe 0 if no unique identifier is available
+ *
+ * @return GNUNET_SYSERR to abort the iteration, GNUNET_OK to continue
+ * (continue on call to "next", of course),
+ * GNUNET_NO to delete the item and continue (if supported)
+ */
+static int
+repl_iter (void *cls,
+ void *next_cls,
+ const GNUNET_HashCode *key,
+ uint32_t size,
+ const void *data,
+ enum GNUNET_BLOCK_Type type,
+ uint32_t priority,
+ uint32_t anonymity,
+ struct GNUNET_TIME_Absolute expiration,
+ uint64_t uid)
+{
+ struct ReplCtx *rc = cls;
+ struct Plugin *plugin = rc->plugin;
+ int ret;
+
+ ret = rc->iter (rc->iter_cls,
+ next_cls, key,
+ size, data,
+ type, priority, anonymity, expiration,
+ uid);
+ if (NULL != key)
+ {
+ sqlite3_bind_int64 (plugin->updRepl, 1, uid);
+ if (SQLITE_DONE != sqlite3_step (plugin->updRepl))
+ {
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_step");
+ if (SQLITE_OK != sqlite3_reset (plugin->updRepl))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
+ return GNUNET_SYSERR;
+ }
+ if (SQLITE_OK != sqlite3_reset (plugin->delRow))
+ LOG_SQLITE (plugin, NULL,
+ GNUNET_ERROR_TYPE_ERROR |
+ GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
+ }
+ return 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 'iter' with all values ZERO or NULL if the datastore is empty.
PluginIterator iter, void *iter_cls)
{
struct Plugin *plugin = cls;
- sqlite3_stmt *stmt;
- struct GNUNET_TIME_Absolute now;
+ struct ReplCtx rc;
#if DEBUG_SQLITE
GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG,
"sqlite",
"Getting random block based on replication order.\n");
#endif
- stmt = plugin->selRepl;
- now = GNUNET_TIME_absolute_get ();
- if (SQLITE_OK != sqlite3_bind_int64 (stmt, 1, now.abs_value))
- {
- LOG_SQLITE (plugin, NULL,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, "sqlite3_bind_XXXX");
- if (SQLITE_OK != sqlite3_reset (stmt))
- LOG_SQLITE (plugin, NULL,
- GNUNET_ERROR_TYPE_ERROR | GNUNET_ERROR_TYPE_BULK, "sqlite3_reset");
- iter (iter_cls, NULL, NULL, 0, NULL, 0, 0, 0,
- GNUNET_TIME_UNIT_ZERO_ABS, 0);
- return;
- }
- execute_get (plugin, stmt, iter, iter_cls);
+ rc.plugin = plugin;
+ rc.iter = iter;
+ rc.iter_cls = iter_cls;
+ execute_get (plugin, plugin->selRepl, &repl_iter, &rc);
}
/**
- * FIXME.
+ * 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)
api->expiration_get = &sqlite_plugin_expiration_get;
api->update = &sqlite_plugin_update;
api->iter_zero_anonymity = &sqlite_plugin_iter_zero_anonymity;
- api->iter_all_now = &sqlite_plugin_iter_all_now;
api->drop = &sqlite_plugin_drop;
GNUNET_log_from (GNUNET_ERROR_TYPE_INFO,
"sqlite", _("Sqlite database running\n"));
projects / oweals / gnunet.git / blobdiff