1 files changed, 346 insertions, 0 deletions
diff --git a/ctdb/tests/src/cluster_wait.c b/ctdb/tests/src/cluster_wait.c
new file mode 100644
index 0000000..d411591
--- /dev/null
+++ b/ctdb/tests/src/cluster_wait.c
@@ -0,0 +1,346 @@
+/*
+   Cluster wide synchronization
+
+   Copyright (C) Amitay Isaacs  2015
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/network.h"
+
+#include "lib/util/tevent_unix.h"
+
+#include "client/client.h"
+
+#include "tests/src/cluster_wait.h"
+
+#define MSG_ID_JOIN	(CTDB_SRVID_TEST_RANGE | 0x1)
+#define MSG_ID_SYNC	(CTDB_SRVID_TEST_RANGE | 0x2)
+
+/* Wait for all the clients to initialize */
+
+struct cluster_wait_state {
+	struct tevent_context *ev;
+	struct ctdb_client_context *client;
+	uint32_t num_nodes;
+	bool *ready;
+	bool join_done;
+};
+
+static void cluster_wait_join_registered(struct tevent_req *subreq);
+static void cluster_wait_sync_registered(struct tevent_req *subreq);
+static void cluster_wait_join(struct tevent_req *subreq);
+static void cluster_wait_join_sent(struct tevent_req *subreq);
+static void cluster_wait_join_handler(uint64_t srvid, TDB_DATA data,
+				      void *private_data);
+static void cluster_wait_join_unregistered(struct tevent_req *subreq);
+static void cluster_wait_sync_sent(struct tevent_req *subreq);
+static void cluster_wait_sync_handler(uint64_t srvid, TDB_DATA data,
+				      void *private_data);
+static void cluster_wait_sync_unregistered(struct tevent_req *subreq);
+
+struct tevent_req *cluster_wait_send(TALLOC_CTX *mem_ctx,
+				     struct tevent_context *ev,
+				     struct ctdb_client_context *client,
+				     uint32_t num_nodes)
+{
+	struct tevent_req *req, *subreq;
+	struct cluster_wait_state *state;
+	bool ok;
+
+	req = tevent_req_create(mem_ctx, &state, struct cluster_wait_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	state->ev = ev;
+	state->client = client;
+	state->num_nodes = num_nodes;
+
+	state->join_done = false;
+
+	if (ctdb_client_pnn(client) == 0) {
+		state->ready = talloc_zero_array(state, bool, num_nodes);
+		if (tevent_req_nomem(state->ready, req)) {
+			return tevent_req_post(req, ev);
+		}
+
+		subreq = ctdb_client_set_message_handler_send(
+					state, ev, client, MSG_ID_JOIN,
+					cluster_wait_join_handler, req);
+		if (tevent_req_nomem(subreq, req)) {
+			return tevent_req_post(req, ev);
+		}
+		tevent_req_set_callback(subreq, cluster_wait_join_registered,
+					req);
+	}
+
+	subreq = ctdb_client_set_message_handler_send(
+					state, ev, client, MSG_ID_SYNC,
+					cluster_wait_sync_handler, req);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, cluster_wait_sync_registered, req);
+
+	/* If cluster is not synchronized within 30 seconds, time out */
+	ok = tevent_req_set_endtime(
+		req,
+		ev,
+		tevent_timeval_current_ofs(30, 0));
+	if (!ok) {
+		return tevent_req_post(req, ev);
+	}
+
+	return req;
+}
+
+static void cluster_wait_join_registered(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	bool status;
+	int ret;
+
+	status = ctdb_client_set_message_handler_recv(subreq, &ret);
+	TALLOC_FREE(subreq);
+	if (! status) {
+		tevent_req_error(req, ret);
+		return;
+	}
+
+	printf("Waiting for cluster\n");
+	fflush(stdout);
+}
+
+static void cluster_wait_sync_registered(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct cluster_wait_state *state = tevent_req_data(
+		req, struct cluster_wait_state);
+	bool status;
+	int ret;
+
+	status = ctdb_client_set_message_handler_recv(subreq, &ret);
+	TALLOC_FREE(subreq);
+	if (! status) {
+		tevent_req_error(req, ret);
+		return;
+	}
+
+	subreq = tevent_wakeup_send(state, state->ev,
+				    tevent_timeval_current_ofs(1, 0));
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, cluster_wait_join, req);
+}
+
+static void cluster_wait_join(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct cluster_wait_state *state = tevent_req_data(
+		req, struct cluster_wait_state);
+	struct ctdb_req_message msg;
+	uint32_t pnn;
+	bool status;
+
+	status = tevent_wakeup_recv(subreq);
+	TALLOC_FREE(subreq);
+	if (! status) {
+		tevent_req_error(req, EIO);
+		return;
+	}
+
+	pnn = ctdb_client_pnn(state->client);
+
+	msg.srvid = MSG_ID_JOIN;
+	msg.data.data.dsize = sizeof(pnn);
+	msg.data.data.dptr = (uint8_t *)&pnn;
+
+	subreq = ctdb_client_message_send(state, state->ev, state->client,
+					  0, &msg);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, cluster_wait_join_sent, req);
+}
+
+static void cluster_wait_join_sent(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct cluster_wait_state *state = tevent_req_data(
+		req, struct cluster_wait_state);
+	bool status;
+	int ret;
+
+	status = ctdb_client_message_recv(subreq, &ret);
+	TALLOC_FREE(subreq);
+	if (! status) {
+		tevent_req_error(req, ret);
+		return;
+	}
+
+	subreq = tevent_wakeup_send(state, state->ev,
+				    tevent_timeval_current_ofs(1, 0));
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, cluster_wait_join, req);
+}
+
+static void cluster_wait_join_handler(uint64_t srvid, TDB_DATA data,
+				      void *private_data)
+{
+	struct tevent_req *req = talloc_get_type_abort(
+		private_data, struct tevent_req);
+	struct cluster_wait_state *state = tevent_req_data(
+		req, struct cluster_wait_state);
+	struct tevent_req *subreq;
+	uint32_t pnn;
+	uint32_t i;
+
+	if (srvid != MSG_ID_JOIN) {
+		return;
+	}
+
+	if (data.dsize != sizeof(uint32_t)) {
+		return;
+	}
+
+	pnn = *(uint32_t *)data.dptr;
+
+	if (pnn > state->num_nodes) {
+		return;
+	}
+
+	state->ready[pnn] = true;
+
+	for (i=0; i<state->num_nodes; i++) {
+		if (! state->ready[i]) {
+			return;
+		}
+	}
+
+	if (state->join_done) {
+		return;
+	}
+
+	state->join_done = true;
+	subreq = ctdb_client_remove_message_handler_send(
+					state, state->ev, state->client,
+					MSG_ID_JOIN, req);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, cluster_wait_join_unregistered, req);
+}
+
+static void cluster_wait_join_unregistered(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct cluster_wait_state *state = tevent_req_data(
+		req, struct cluster_wait_state);
+	struct ctdb_req_message msg;
+	bool status;
+	int ret;
+
+	status = ctdb_client_remove_message_handler_recv(subreq, &ret);
+	if (! status) {
+		tevent_req_error(req, ret);
+		return;
+	}
+
+	msg.srvid = MSG_ID_SYNC;
+	msg.data.data = tdb_null;
+
+	subreq = ctdb_client_message_send(state, state->ev, state->client,
+					  CTDB_BROADCAST_CONNECTED, &msg);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, cluster_wait_sync_sent, req);
+}
+
+static void cluster_wait_sync_sent(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	bool status;
+	int ret;
+
+	status = ctdb_client_message_recv(subreq, &ret);
+	TALLOC_FREE(subreq);
+	if (! status) {
+		tevent_req_error(req, ret);
+		return;
+	}
+}
+
+static void cluster_wait_sync_handler(uint64_t srvid, TDB_DATA data,
+				      void *private_data)
+{
+	struct tevent_req *req = talloc_get_type_abort(
+		private_data, struct tevent_req);
+	struct cluster_wait_state *state = tevent_req_data(
+		req, struct cluster_wait_state);
+	struct tevent_req *subreq;
+
+	if (srvid != MSG_ID_SYNC) {
+		return;
+	}
+
+	subreq = ctdb_client_remove_message_handler_send(
+					state, state->ev, state->client,
+					MSG_ID_SYNC, req);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, cluster_wait_sync_unregistered, req);
+}
+
+static void cluster_wait_sync_unregistered(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	bool status;
+	int ret;
+
+	status = ctdb_client_remove_message_handler_recv(subreq, &ret);
+	TALLOC_FREE(subreq);
+	if (! status) {
+		tevent_req_error(req, ret);
+		return;
+	}
+
+	tevent_req_done(req);
+}
+
+bool cluster_wait_recv(struct tevent_req *req, int *perr)
+{
+	int err;
+
+	if (tevent_req_is_unix_error(req, &err)) {
+		if (perr != NULL) {
+			*perr = err;
+		}
+		return false;
+	}
+	return true;
+}