[Rework] Adopt fuzzy storage for abstract backend

1 files changed, 259 insertions, 211 deletions

diff --git a/src/fuzzy_storage.c b/src/fuzzy_storage.c
index 0d29cd197..d663a89e4 100644
--- a/src/fuzzy_storage.c
+++ b/src/fuzzy_storage.c
@@ -36,15 +36,11 @@
 #include "libutil/http_private.h"
 #include "unix-std.h"
 
-/* This number is used as expire time in seconds for cache items  (2 days) */
-#define DEFAULT_EXPIRE 172800L
 /* Resync value in seconds */
 #define DEFAULT_SYNC_TIMEOUT 60.0
 #define DEFAULT_KEYPAIR_CACHE_SIZE 512
 #define DEFAULT_MASTER_TIMEOUT 10.0
 
-#define INVALID_NODE_TIME (guint64) - 1
-
 static const gchar *local_db_name = "local";
 
 #define msg_err_fuzzy_update(...) rspamd_default_log_function (G_LOG_LEVEL_CRITICAL, \
@@ -77,10 +73,6 @@ worker_t fuzzy_worker = {
 		RSPAMD_WORKER_VER           /* Version info */
 };
 
-/* For evtimer */
-static struct timeval tmv;
-static struct event tev;
-
 struct fuzzy_global_stat {
 	guint64 fuzzy_hashes;
 	/**< number of fuzzy hashes stored					*/
@@ -139,7 +131,7 @@ struct rspamd_fuzzy_storage_ctx {
 	gboolean encrypted_only;
 	struct rspamd_keypair_cache *keypair_cache;
 	rspamd_lru_hash_t *errors_ips;
-	struct rspamd_fuzzy_backend_sqlite *backend;
+	struct rspamd_fuzzy_backend *backend;
 	GQueue *updates_pending;
 	struct rspamd_dns_resolver *resolver;
 	struct rspamd_config *cfg;
@@ -165,6 +157,7 @@ struct fuzzy_session {
 	} cmd;
 
 	struct rspamd_fuzzy_encrypted_reply reply;
+	struct fuzzy_key_stat *ip_stat;
 
 	enum rspamd_fuzzy_epoch epoch;
 	enum fuzzy_cmd_type cmd_type;
@@ -191,7 +184,10 @@ struct fuzzy_master_update_session {
 	const gchar *name;
 	gchar uid[16];
 	struct rspamd_http_connection *conn;
+	struct rspamd_http_message *msg;
 	struct rspamd_fuzzy_storage_ctx *ctx;
+	const gchar *src;
+	gchar *psrc;
 	rspamd_inet_addr_t *addr;
 	gboolean replied;
 	gint sock;
@@ -242,6 +238,14 @@ fuzzy_key_dtor (gpointer p)
 	g_slice_free1 (sizeof (*key), key);
 }
 
+static void
+fuzzy_count_callback (guint64 count, void *ud)
+{
+	struct rspamd_fuzzy_storage_ctx *ctx = ud;
+
+	ctx->stat.fuzzy_hashes = count;
+}
+
 struct fuzzy_slave_connection {
 	struct rspamd_cryptobox_keypair *local_key;
 	struct rspamd_cryptobox_pubkey *remote_key;
@@ -266,19 +270,34 @@ fuzzy_mirror_close_connection (struct fuzzy_slave_connection *conn)
 	}
 }
 
+struct rspamd_fuzzy_updates_cbdata {
+	struct rspamd_fuzzy_storage_ctx *ctx;
+	struct rspamd_http_message *msg;
+	struct fuzzy_slave_connection *conn;
+	struct rspamd_fuzzy_mirror *m;
+};
+
 static void
-fuzzy_mirror_updates_to_http (struct rspamd_fuzzy_storage_ctx *ctx,
-		struct rspamd_http_message *msg)
+fuzzy_mirror_updates_version_cb (guint64 rev64, void *ud)
 {
+	struct rspamd_fuzzy_updates_cbdata *cbdata = ud;
 	GList *cur;
 	struct fuzzy_peer_cmd *io_cmd;
-	guint32 len;
-	guint32 rev;
+	guint32 rev32 = rev64, len;
 	const gchar *p;
 	rspamd_fstring_t *reply;
+	struct fuzzy_slave_connection *conn;
+	struct rspamd_fuzzy_storage_ctx *ctx;
+	struct rspamd_http_message *msg;
+	struct rspamd_fuzzy_mirror *m;
+	struct timeval tv;
 
-	rev = rspamd_fuzzy_backend_sqlite_version (ctx->backend, local_db_name);
-	rev = GUINT32_TO_LE (rev);
+	conn = cbdata->conn;
+	ctx = cbdata->ctx;
+	msg = cbdata->msg;
+	m = cbdata->m;
+	g_slice_free1 (sizeof (*cbdata), cbdata);
+	rev32 = GUINT32_TO_LE (rev32);
 	len = sizeof (guint32) * 2; /* revision + last chunk */
 
 	for (cur = ctx->updates_pending->head; cur != NULL; cur = g_list_next (cur)) {
@@ -295,8 +314,8 @@ fuzzy_mirror_updates_to_http (struct rspamd_fuzzy_storage_ctx *ctx,
 	}
 
 	reply = rspamd_fstring_sized_new (len);
-	reply = rspamd_fstring_append (reply, (const char *)&rev,
-			sizeof (rev));
+	reply = rspamd_fstring_append (reply, (const char *)&rev32,
+			sizeof (rev32));
 
 	for (cur = ctx->updates_pending->head; cur != NULL; cur = g_list_next (cur)) {
 		io_cmd = cur->data;
@@ -320,6 +339,30 @@ fuzzy_mirror_updates_to_http (struct rspamd_fuzzy_storage_ctx *ctx,
 	len = 0;
 	reply = rspamd_fstring_append (reply, (const char *)&len, sizeof (len));
 	rspamd_http_message_set_body_from_fstring_steal (msg, reply);
+	double_to_tv (ctx->sync_timeout, &tv);
+	rspamd_http_connection_write_message (conn->http_conn,
+			msg, NULL, NULL, conn,
+			conn->sock,
+			&tv, ctx->ev_base);
+	msg_info ("send update request to %s", m->name);
+}
+
+static void
+fuzzy_mirror_updates_to_http (struct rspamd_fuzzy_mirror *m,
+		struct fuzzy_slave_connection *conn,
+		struct rspamd_fuzzy_storage_ctx *ctx,
+		struct rspamd_http_message *msg)
+{
+
+	struct rspamd_fuzzy_updates_cbdata *cbdata;
+
+	cbdata = g_slice_alloc (sizeof (*cbdata));
+	cbdata->ctx = ctx;
+	cbdata->msg = msg;
+	cbdata->conn = conn;
+	cbdata->m = m;
+	rspamd_fuzzy_backend_version (ctx->backend, local_db_name,
+			fuzzy_mirror_updates_version_cb, cbdata);
 }
 
 static void
@@ -353,7 +396,6 @@ rspamd_fuzzy_send_update_mirror (struct rspamd_fuzzy_storage_ctx *ctx,
 {
 	struct fuzzy_slave_connection *conn;
 	struct rspamd_http_message *msg;
-	struct timeval tv;
 
 	conn = g_slice_alloc0 (sizeof (*conn));
 	conn->up = rspamd_upstream_get (m->u,
@@ -389,84 +431,85 @@ rspamd_fuzzy_send_update_mirror (struct rspamd_fuzzy_storage_ctx *ctx,
 	rspamd_http_connection_set_key (conn->http_conn,
 			ctx->sync_keypair);
 	msg->peer_key = rspamd_pubkey_ref (m->key);
-	double_to_tv (ctx->sync_timeout, &tv);
-	fuzzy_mirror_updates_to_http (ctx, msg);
+	fuzzy_mirror_updates_to_http (m, conn, ctx, msg);
+}
 
-	rspamd_http_connection_write_message (conn->http_conn,
-			msg, NULL, NULL, conn,
-			conn->sock,
-			&tv, ctx->ev_base);
-	msg_info ("send update request to %s", m->name);
+struct rspamd_updates_cbdata {
+	struct rspamd_fuzzy_storage_ctx *ctx;
+	const gchar *source;
+};
+
+static void
+fuzzy_update_version_callback (guint64 ver, void *ud)
+{
+	msg_info ("updated fuzzy storage from %s: version: %d",
+		(const char *)ud, (gint)ver);
 }
 
 static void
-rspamd_fuzzy_process_updates_queue (struct rspamd_fuzzy_storage_ctx *ctx,
-		const gchar *source)
+rspamd_fuzzy_updates_cb (gboolean success, void *ud)
 {
-	GList *cur;
-	struct fuzzy_peer_cmd *io_cmd;
-	struct rspamd_fuzzy_cmd *cmd;
-	gpointer ptr;
+	struct rspamd_updates_cbdata *cbdata = ud;
 	struct rspamd_fuzzy_mirror *m;
 	guint nupdates = 0, i;
+	struct rspamd_fuzzy_storage_ctx *ctx;
+	const gchar *source;
+	GList *cur;
+	struct fuzzy_peer_cmd *io_cmd;
 
-	if (ctx->updates_pending &&
-			g_queue_get_length (ctx->updates_pending) > 0 &&
-			rspamd_fuzzy_backend_sqlite_prepare_update (ctx->backend, source)) {
-		cur = ctx->updates_pending->head;
+	ctx = cbdata->ctx;
+	source = cbdata->source;
 
-		while (cur) {
-			io_cmd = cur->data;
+	if (success) {
+		rspamd_fuzzy_backend_count (ctx->backend, fuzzy_count_callback, ctx);
 
-			if (io_cmd->is_shingle) {
-				cmd = &io_cmd->cmd.shingle.basic;
-				ptr = &io_cmd->cmd.shingle;
-			}
-			else {
-				cmd = &io_cmd->cmd.normal;
-				ptr = &io_cmd->cmd.normal;
-			}
+		if (nupdates > 0) {
+			for (i = 0; i < ctx->mirrors->len; i ++) {
+				m = g_ptr_array_index (ctx->mirrors, i);
 
-			if (cmd->cmd == FUZZY_WRITE) {
-				rspamd_fuzzy_backend_sqlite_add (ctx->backend, ptr);
-			}
-			else {
-				rspamd_fuzzy_backend_sqlite_del (ctx->backend, ptr);
+				rspamd_fuzzy_send_update_mirror (ctx, m);
 			}
+		}
+
+		/* Clear updates */
+		cur = ctx->updates_pending->head;
 
-			nupdates++;
+		while (cur) {
+			io_cmd = cur->data;
+			g_slice_free1 (sizeof (*io_cmd), io_cmd);
 			cur = g_list_next (cur);
 		}
 
-		if (rspamd_fuzzy_backend_sqlite_finish_update (ctx->backend, source, nupdates > 0)) {
-			ctx->stat.fuzzy_hashes = rspamd_fuzzy_backend_sqlite_count (ctx->backend);
+		g_queue_clear (ctx->updates_pending);
+		rspamd_fuzzy_backend_version (ctx->backend, source,
+				fuzzy_update_version_callback, (void *)source);
 
-			if (nupdates > 0) {
-				for (i = 0; i < ctx->mirrors->len; i ++) {
-					m = g_ptr_array_index (ctx->mirrors, i);
+	}
+	else {
+		msg_err ("cannot commit update transaction to fuzzy backend, "
+				"%ud updates are still pending",
+				g_queue_get_length (ctx->updates_pending));
+	}
 
-					rspamd_fuzzy_send_update_mirror (ctx, m);
-				}
-			}
+	g_slice_free1 (sizeof (*cbdata), cbdata);
+}
 
-			/* Clear updates */
-			cur = ctx->updates_pending->head;
+static void
+rspamd_fuzzy_process_updates_queue (struct rspamd_fuzzy_storage_ctx *ctx,
+		const gchar *source)
+{
+
+	struct rspamd_updates_cbdata *cbdata;
+
+	if (ctx->updates_pending &&
+			g_queue_get_length (ctx->updates_pending) > 0) {
+		cbdata = g_slice_alloc (sizeof (*cbdata));
+		cbdata->ctx = ctx;
+		cbdata->source = source;
+		rspamd_fuzzy_backend_process_updates (ctx->backend, ctx->updates_pending,
+				source, rspamd_fuzzy_updates_cb, cbdata);
 
-			while (cur) {
-				io_cmd = cur->data;
-				g_slice_free1 (sizeof (*io_cmd), io_cmd);
-				cur = g_list_next (cur);
-			}
 
-			g_queue_clear (ctx->updates_pending);
-			msg_info ("updated fuzzy storage: %ud updates processed, version: %d",
-					nupdates, rspamd_fuzzy_backend_sqlite_version (ctx->backend, source));
-		}
-		else {
-			msg_err ("cannot commit update transaction to fuzzy backend, "
-					"%ud updates are still pending",
-					g_queue_get_length (ctx->updates_pending));
-		}
 	}
 	else if (ctx->updates_pending &&
 			g_queue_get_length (ctx->updates_pending) > 0) {
@@ -599,6 +642,77 @@ rspamd_fuzzy_update_stats (struct rspamd_fuzzy_storage_ctx *ctx,
 }
 
 static void
+rspamd_fuzzy_make_reply (struct rspamd_fuzzy_cmd *cmd,
+		struct rspamd_fuzzy_reply *result,
+		struct fuzzy_session *session,
+		gboolean encrypted, gboolean is_shingle)
+{
+	if (cmd) {
+		result->tag = cmd->tag;
+
+		memcpy (&session->reply.rep, result, sizeof (*result));
+
+		rspamd_fuzzy_update_stats (session->ctx,
+				session->epoch,
+				result->prob > 0.5,
+				is_shingle,
+				session->key_stat,
+				session->ip_stat,
+				cmd->cmd,
+				result->value);
+
+		if (encrypted) {
+			/* We need also to encrypt reply */
+			ottery_rand_bytes (session->reply.hdr.nonce,
+					sizeof (session->reply.hdr.nonce));
+			rspamd_cryptobox_encrypt_nm_inplace ((guchar *)&session->reply.rep,
+					sizeof (session->reply.rep),
+					session->reply.hdr.nonce,
+					session->nm,
+					session->reply.hdr.mac,
+					RSPAMD_CRYPTOBOX_MODE_25519);
+		}
+	}
+
+	rspamd_fuzzy_write_reply (session);
+}
+
+static void
+rspamd_fuzzy_check_callback (struct rspamd_fuzzy_reply *result, void *ud)
+{
+	struct fuzzy_session *session = ud;
+	gboolean encrypted = FALSE, is_shingle = FALSE;
+	struct rspamd_fuzzy_cmd *cmd = NULL;
+	gsize up_len = 0;
+
+	switch (session->cmd_type) {
+	case CMD_NORMAL:
+		cmd = &session->cmd.normal;
+		up_len = sizeof (session->cmd.normal);
+		break;
+	case CMD_SHINGLE:
+		cmd = &session->cmd.shingle.basic;
+		up_len = sizeof (session->cmd.shingle);
+		is_shingle = TRUE;
+		break;
+	case CMD_ENCRYPTED_NORMAL:
+		cmd = &session->cmd.enc_normal.cmd;
+		up_len = sizeof (session->cmd.normal);
+		encrypted = TRUE;
+		break;
+	case CMD_ENCRYPTED_SHINGLE:
+		cmd = &session->cmd.enc_shingle.cmd.basic;
+		up_len = sizeof (session->cmd.shingle);
+		encrypted = TRUE;
+		is_shingle = TRUE;
+		break;
+	}
+
+	rspamd_fuzzy_make_reply (cmd, result, session, encrypted, is_shingle);
+	REF_RELEASE (session);
+}
+
+static void
 rspamd_fuzzy_process_command (struct fuzzy_session *session)
 {
 	gboolean encrypted = FALSE, is_shingle = FALSE;
@@ -637,14 +751,16 @@ rspamd_fuzzy_process_command (struct fuzzy_session *session)
 	if (G_UNLIKELY (cmd == NULL || up_len == 0)) {
 		result.value = 500;
 		result.prob = 0.0;
-		goto reply;
+		rspamd_fuzzy_make_reply (cmd, &result, session, encrypted, is_shingle);
+		return;
 	}
 
 	if (session->ctx->encrypted_only && !encrypted) {
 		/* Do not accept unencrypted commands */
 		result.value = 403;
 		result.prob = 0.0;
-		goto reply;
+		rspamd_fuzzy_make_reply (cmd, &result, session, encrypted, is_shingle);
+		return;
 	}
 
 	if (session->key_stat) {
@@ -657,17 +773,21 @@ rspamd_fuzzy_process_command (struct fuzzy_session *session)
 			rspamd_lru_hash_insert (session->key_stat->last_ips,
 					naddr, ip_stat, -1, 0);
 		}
+
+		session->ip_stat = ip_stat;
 	}
 
 	result.flag = cmd->flag;
 	if (cmd->cmd == FUZZY_CHECK) {
-		result = rspamd_fuzzy_backend_sqlite_check (session->ctx->backend, cmd,
-				session->ctx->expire);
+		REF_RETAIN (session);
+		rspamd_fuzzy_backend_check (session->ctx->backend, cmd,
+				rspamd_fuzzy_check_callback, session);
 	}
 	else if (cmd->cmd == FUZZY_STAT) {
 		result.prob = 1.0;
 		result.value = 0;
-		result.flag = rspamd_fuzzy_backend_sqlite_count (session->ctx->backend);
+		result.flag = session->ctx->stat.fuzzy_hashes;
+		rspamd_fuzzy_make_reply (cmd, &result, session, encrypted, is_shingle);
 	}
 	else {
 		if (rspamd_fuzzy_check_client (session)) {
@@ -703,36 +823,9 @@ rspamd_fuzzy_process_command (struct fuzzy_session *session)
 			result.value = 403;
 			result.prob = 0.0;
 		}
-	}
-
-reply:
-	if (cmd) {
-		result.tag = cmd->tag;
 
-		memcpy (&session->reply.rep, &result, sizeof (result));
-
-		rspamd_fuzzy_update_stats (session->ctx,
-				session->epoch,
-				result.prob > 0.5,
-				is_shingle,
-				session->key_stat,
-				ip_stat, cmd->cmd,
-				result.value);
-
-		if (encrypted) {
-			/* We need also to encrypt reply */
-			ottery_rand_bytes (session->reply.hdr.nonce,
-					sizeof (session->reply.hdr.nonce));
-			rspamd_cryptobox_encrypt_nm_inplace ((guchar *)&session->reply.rep,
-					sizeof (session->reply.rep),
-					session->reply.hdr.nonce,
-					session->nm,
-					session->reply.hdr.mac,
-					RSPAMD_CRYPTOBOX_MODE_25519);
-		}
+		rspamd_fuzzy_make_reply (cmd, &result, session, encrypted, is_shingle);
 	}
-
-	rspamd_fuzzy_write_reply (session);
 }
 
 
@@ -916,12 +1009,11 @@ rspamd_fuzzy_cmd_from_wire (guchar *buf, guint buflen, struct fuzzy_session *s)
 
 static void
 rspamd_fuzzy_mirror_process_update (struct fuzzy_master_update_session *session,
-		struct rspamd_http_message *msg)
+		struct rspamd_http_message *msg, guint our_rev)
 {
 	const guchar *p;
-	gchar *src = NULL, *psrc;
 	gsize remain;
-	gint32 revision, our_rev;
+	gint32 revision;
 	guint32 len = 0, cnt = 0;
 	struct fuzzy_peer_cmd cmd, *pcmd;
 	enum {
@@ -932,25 +1024,6 @@ rspamd_fuzzy_mirror_process_update (struct fuzzy_master_update_session *session,
 	GList *updates = NULL, *cur;
 	gpointer flag_ptr;
 
-	if (!rspamd_http_message_get_body (msg, NULL) || !msg->url
-			|| msg->url->len == 0) {
-		msg_err_fuzzy_update ("empty update message, not processing");
-
-		return;
-	}
-
-	/* Detect source from url: /update_v1/<source>, so we look for the last '/' */
-	remain = msg->url->len;
-	psrc = rspamd_fstringdup (msg->url);
-	src = psrc;
-
-	while (remain--) {
-		if (src[remain] == '/') {
-			src = &src[remain + 1];
-			break;
-		}
-	}
-
 	/*
 	 * Message format:
 	 * <uint32_le> - revision
@@ -965,13 +1038,11 @@ rspamd_fuzzy_mirror_process_update (struct fuzzy_master_update_session *session,
 	if (remain > sizeof (gint32) * 2) {
 		memcpy (&revision, p, sizeof (gint32));
 		revision = GINT32_TO_LE (revision);
-		our_rev = rspamd_fuzzy_backend_sqlite_version (session->ctx->backend, src);
 
 		if (revision <= our_rev) {
 			msg_err_fuzzy_update ("remote revision: %d is older than ours: %d, "
 					"refusing update",
 					revision, our_rev);
-			g_free (psrc);
 
 			return;
 		}
@@ -1076,7 +1147,7 @@ rspamd_fuzzy_mirror_process_update (struct fuzzy_master_update_session *session,
 		cur->data = NULL;
 	}
 
-	rspamd_fuzzy_process_updates_queue (session->ctx, src);
+	rspamd_fuzzy_process_updates_queue (session->ctx, session->src);
 	msg_info_fuzzy_update ("processed updates from the master %s, "
 			"%ud operations processed,"
 			" revision: %d (local revision: %d)",
@@ -1084,8 +1155,6 @@ rspamd_fuzzy_mirror_process_update (struct fuzzy_master_update_session *session,
 			cnt, revision, our_rev);
 
 err:
-	g_free (psrc);
-
 	if (updates) {
 		/* We still need to clear queue */
 		for (cur = updates; cur != NULL; cur = g_list_next (cur)) {
@@ -1119,6 +1188,10 @@ rspamd_fuzzy_mirror_session_destroy (struct fuzzy_master_update_session *session
 		rspamd_http_connection_unref (session->conn);
 		rspamd_inet_address_destroy (session->addr);
 		close (session->sock);
+
+		if (session->psrc) {
+			g_free (session->psrc);
+		}
 		g_slice_free1 (sizeof (*session), session);
 	}
 }
@@ -1151,6 +1224,15 @@ rspamd_fuzzy_mirror_send_reply (struct fuzzy_master_update_session *session,
 			session->ctx->ev_base);
 }
 
+static void
+rspamd_fuzzy_update_version_callback (guint64 version, void *ud)
+{
+	struct fuzzy_master_update_session *session = ud;
+
+	rspamd_fuzzy_mirror_process_update (session, session->msg, version);
+	rspamd_fuzzy_mirror_send_reply (session, 200, "OK");
+}
+
 static gint
 rspamd_fuzzy_mirror_finish_handler (struct rspamd_http_connection *conn,
 	struct rspamd_http_message *msg)
@@ -1158,6 +1240,9 @@ rspamd_fuzzy_mirror_finish_handler (struct rspamd_http_connection *conn,
 	struct fuzzy_master_update_session *session = conn->ud;
 	const struct rspamd_cryptobox_pubkey *rk;
 	const gchar *err_str = NULL;
+	gchar *psrc;
+	const gchar *src = NULL;
+	gsize remain;
 
 	if (session->replied) {
 		rspamd_fuzzy_mirror_session_destroy (session);
@@ -1189,9 +1274,30 @@ rspamd_fuzzy_mirror_finish_handler (struct rspamd_http_connection *conn,
 			msg_warn_fuzzy_update ("no trusted key specified, accept any update from %s",
 					rspamd_inet_address_to_string (session->addr));
 		}
+		if (!rspamd_http_message_get_body (msg, NULL) || !msg->url
+				|| msg->url->len == 0) {
+			msg_err_fuzzy_update ("empty update message, not processing");
 
-		rspamd_fuzzy_mirror_process_update (session, msg);
-		rspamd_fuzzy_mirror_send_reply (session, 200, "OK");
+			goto end;
+		}
+
+		/* Detect source from url: /update_v1/<source>, so we look for the last '/' */
+		remain = msg->url->len;
+		psrc = rspamd_fstringdup (msg->url);
+		src = psrc;
+
+		while (remain--) {
+			if (src[remain] == '/') {
+				src = &src[remain + 1];
+				break;
+			}
+		}
+
+		session->src = src;
+		session->psrc = psrc;
+		session->msg = msg;
+		rspamd_fuzzy_backend_version (session->ctx->backend, src,
+				rspamd_fuzzy_update_version_callback, session);
 
 		return 0;
 	}
@@ -1352,38 +1458,6 @@ accept_fuzzy_socket (gint fd, short what, void *arg)
 	}
 }
 
-static void
-sync_callback (gint fd, short what, void *arg)
-{
-	struct rspamd_worker *worker = (struct rspamd_worker *)arg;
-	struct rspamd_fuzzy_storage_ctx *ctx;
-	gdouble next_check;
-	guint64 old_expired, new_expired;
-
-	ctx = worker->ctx;
-
-	if (ctx->backend) {
-		rspamd_fuzzy_process_updates_queue (ctx, local_db_name);
-		/* Call backend sync */
-		old_expired = rspamd_fuzzy_backend_sqlite_expired (ctx->backend);
-		rspamd_fuzzy_backend_sqlite_sync (ctx->backend, ctx->expire, TRUE);
-		new_expired = rspamd_fuzzy_backend_sqlite_expired (ctx->backend);
-
-		if (old_expired < new_expired) {
-			ctx->stat.fuzzy_hashes_expired += new_expired - old_expired;
-		}
-	}
-
-	/* Timer event */
-	event_del (&tev);
-	evtimer_set (&tev, sync_callback, worker);
-	event_base_set (ctx->ev_base, &tev);
-	/* Plan event with jitter */
-	next_check = rspamd_time_jitter (ctx->sync_timeout, 0);
-	double_to_tv (next_check, &tmv);
-	evtimer_add (&tev, &tmv);
-}
-
 static gboolean
 rspamd_fuzzy_storage_sync (struct rspamd_main *rspamd_main,
 		struct rspamd_worker *worker, gint fd,
@@ -1392,29 +1466,13 @@ rspamd_fuzzy_storage_sync (struct rspamd_main *rspamd_main,
 		gpointer ud)
 {
 	struct rspamd_fuzzy_storage_ctx *ctx = ud;
-	gdouble next_check;
-	guint64 old_expired, new_expired;
 	struct rspamd_control_reply rep;
 
-	if (ctx->backend) {
-		rspamd_fuzzy_process_updates_queue (ctx, local_db_name);
-		/* Call backend sync */
-		old_expired = rspamd_fuzzy_backend_sqlite_expired (ctx->backend);
-		rspamd_fuzzy_backend_sqlite_sync (ctx->backend, ctx->expire, TRUE);
-		new_expired = rspamd_fuzzy_backend_sqlite_expired (ctx->backend);
-
-		if (old_expired < new_expired) {
-			ctx->stat.fuzzy_hashes_expired += new_expired - old_expired;
-		}
-	}
-
 	rep.reply.fuzzy_sync.status = 0;
 
-	/* Handle next timer event */
-	event_del (&tev);
-	next_check = rspamd_time_jitter (ctx->sync_timeout, 0);
-	double_to_tv (next_check, &tmv);
-	evtimer_add (&tev, &tmv);
+	if (ctx->backend && worker->index == 0) {
+		rspamd_fuzzy_backend_start_expire (ctx->backend, ctx->sync_timeout);
+	}
 
 	if (write (fd, &rep, sizeof (rep)) != sizeof (rep)) {
 		msg_err ("cannot write reply to the control socket: %s",
@@ -1439,14 +1497,14 @@ rspamd_fuzzy_storage_reload (struct rspamd_main *rspamd_main,
 
 	if (ctx->backend) {
 		/* Close backend and reopen it one more time */
-		rspamd_fuzzy_backend_sqlite_close (ctx->backend);
+		rspamd_fuzzy_backend_close (ctx->backend);
 	}
 
 	memset (&rep, 0, sizeof (rep));
 	rep.type = RSPAMD_CONTROL_RELOAD;
 
-	if ((ctx->backend = rspamd_fuzzy_backend_sqlite_open (ctx->hashfile,
-			TRUE,
+	if ((ctx->backend = rspamd_fuzzy_backend_create (ctx->ev_base,
+			worker->cf->options,
 			&err)) == NULL) {
 		msg_err ("cannot open backend after reload: %e", err);
 		g_error_free (err);
@@ -1456,6 +1514,10 @@ rspamd_fuzzy_storage_reload (struct rspamd_main *rspamd_main,
 		rep.reply.reload.status = 0;
 	}
 
+	if (ctx->backend && worker->index == 0) {
+		rspamd_fuzzy_backend_start_expire (ctx->backend, ctx->sync_timeout);
+	}
+
 	if (write (fd, &rep, sizeof (rep)) != sizeof (rep)) {
 		msg_err ("cannot write reply to the control socket: %s",
 				strerror (errno));
@@ -1644,7 +1706,7 @@ rspamd_fuzzy_storage_stat (struct rspamd_main *rspamd_main,
 		rep.reply.fuzzy_stat.status = 0;
 
 		memcpy (rep.reply.fuzzy_stat.storage_id,
-				rspamd_fuzzy_sqlite_backend_id (ctx->backend),
+				rspamd_fuzzy_backend_id (ctx->backend),
 				sizeof (rep.reply.fuzzy_stat.storage_id));
 
 		obj = rspamd_fuzzy_stat_to_ucl (ctx, TRUE);
@@ -1901,7 +1963,6 @@ init_fuzzy (struct rspamd_config *cfg)
 	ctx->magic = rspamd_fuzzy_storage_magic;
 	ctx->sync_timeout = DEFAULT_SYNC_TIMEOUT;
 	ctx->master_timeout = DEFAULT_MASTER_TIMEOUT;
-	ctx->expire = DEFAULT_EXPIRE;
 	ctx->keypair_cache_size = DEFAULT_KEYPAIR_CACHE_SIZE;
 	ctx->keys = g_hash_table_new_full (fuzzy_kp_hash, fuzzy_kp_equal,
 			NULL, fuzzy_key_dtor);
@@ -2108,7 +2169,6 @@ fuzzy_peer_rep (struct rspamd_worker *worker,
 	GList *cur;
 	struct rspamd_worker_listen_socket *ls;
 	struct event *accept_events;
-	gdouble next_check;
 
 	ctx->peer_fd = rep_fd;
 
@@ -2157,14 +2217,6 @@ fuzzy_peer_rep (struct rspamd_worker *worker,
 		event_base_set (ctx->ev_base, &ctx->peer_ev);
 		event_add (&ctx->peer_ev, NULL);
 		ctx->updates_pending = g_queue_new ();
-
-		/* Timer event */
-		evtimer_set (&tev, sync_callback, worker);
-		event_base_set (ctx->ev_base, &tev);
-		/* Plan event with jitter */
-		next_check = rspamd_time_jitter (ctx->sync_timeout, 0);
-		double_to_tv (next_check, &tmv);
-		evtimer_add (&tev, &tmv);
 	}
 }
 
@@ -2188,13 +2240,14 @@ start_fuzzy (struct rspamd_worker *worker)
 	/*
 	 * Open DB and perform VACUUM
 	 */
-	if ((ctx->backend = rspamd_fuzzy_backend_sqlite_open (ctx->hashfile, TRUE, &err)) == NULL) {
+	if ((ctx->backend = rspamd_fuzzy_backend_create (ctx->ev_base,
+			worker->cf->options, &err)) == NULL) {
 		msg_err ("cannot open backend: %e", err);
 		g_error_free (err);
 		exit (EXIT_SUCCESS);
 	}
 
-	ctx->stat.fuzzy_hashes = rspamd_fuzzy_backend_sqlite_count (ctx->backend);
+	rspamd_fuzzy_backend_count (ctx->backend, fuzzy_count_callback, ctx);
 
 	if (ctx->keypair_cache_size > 0) {
 		/* Create keypairs cache */
@@ -2202,7 +2255,7 @@ start_fuzzy (struct rspamd_worker *worker)
 	}
 
 	if (worker->index == 0) {
-		rspamd_fuzzy_backend_sqlite_sync (ctx->backend, ctx->expire, TRUE);
+		rspamd_fuzzy_backend_start_expire (ctx->backend, ctx->sync_timeout);
 	}
 
 	if (ctx->mirrors && ctx->mirrors->len != 0) {
@@ -2260,12 +2313,7 @@ start_fuzzy (struct rspamd_worker *worker)
 	event_base_loop (ctx->ev_base, 0);
 	rspamd_worker_block_signals ();
 
-	if (worker->index == 0) {
-		rspamd_fuzzy_process_updates_queue (ctx, local_db_name);
-		rspamd_fuzzy_backend_sqlite_sync (ctx->backend, ctx->expire, TRUE);
-	}
-
-	rspamd_fuzzy_backend_sqlite_close (ctx->backend);
+	rspamd_fuzzy_backend_close (ctx->backend);
 	rspamd_log_close (worker->srv->logger);
 
 	if (ctx->peer_fd != -1) {