Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 184 insertions, 0 deletions

diff --git a/ctdb/client/client_call.c b/ctdb/client/client_call.c
new file mode 100644
index 0000000..088ba67
--- /dev/null
+++ b/ctdb/client/client_call.c
@@ -0,0 +1,184 @@
+/*
+   CTDB client code
+
+   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 "system/filesys.h"
+
+#include <talloc.h>
+#include <tevent.h>
+#include <tdb.h>
+
+#include "lib/util/tevent_unix.h"
+
+#include "common/reqid.h"
+#include "common/srvid.h"
+#include "common/comm.h"
+
+#include "protocol/protocol.h"
+#include "protocol/protocol_api.h"
+
+#include "client/client_private.h"
+#include "client/client.h"
+
+
+/*
+ * Handle REQ_CALL and REPLY_CALL
+ */
+
+struct ctdb_client_call_state {
+	struct ctdb_client_context *client;
+	uint32_t reqid;
+	struct ctdb_reply_call *reply;
+	struct tevent_req *req;
+};
+
+static int ctdb_client_call_state_destructor(
+	struct ctdb_client_call_state *state);
+static void ctdb_client_call_done(struct tevent_req *subreq);
+
+struct tevent_req *ctdb_client_call_send(TALLOC_CTX *mem_ctx,
+					 struct tevent_context *ev,
+					 struct ctdb_client_context *client,
+					 struct ctdb_req_call *request)
+{
+	struct ctdb_req_header h;
+	struct tevent_req *req, *subreq;
+	struct ctdb_client_call_state *state;
+	uint32_t reqid;
+	uint8_t *buf;
+	size_t datalen, buflen;
+	int ret;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct ctdb_client_call_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	reqid = reqid_new(client->idr, state);
+	if (reqid == REQID_INVALID) {
+		talloc_free(req);
+		return NULL;
+	}
+
+	state->client = client;
+	state->reqid = reqid;
+	state->req = req;
+	state->reply = talloc_zero(state, struct ctdb_reply_call);
+	if (tevent_req_nomem(state->reply, req)) {
+		return tevent_req_post(req, ev);
+	}
+
+	talloc_set_destructor(state, ctdb_client_call_state_destructor);
+
+	ctdb_req_header_fill(&h, 0, CTDB_REQ_CALL, CTDB_CURRENT_NODE,
+			     client->pnn, reqid);
+
+	datalen = ctdb_req_call_len(&h, request);
+	ret = ctdb_allocate_pkt(state, datalen, &buf, &buflen);
+	if (ret != 0) {
+		tevent_req_error(req, ret);
+		return tevent_req_post(req, ev);
+	}
+
+	ret = ctdb_req_call_push(&h, request, buf, &buflen);
+	if (ret != 0) {
+		tevent_req_error(req, ret);
+		return tevent_req_post(req, ev);
+	}
+
+	subreq = comm_write_send(state, ev, client->comm, buf, buflen);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, ctdb_client_call_done, req);
+
+	return req;
+}
+
+static int ctdb_client_call_state_destructor(
+	struct ctdb_client_call_state *state)
+{
+	reqid_remove(state->client->idr, state->reqid);
+	return 0;
+}
+
+static void ctdb_client_call_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	bool status;
+	int ret;
+
+	status = comm_write_recv(subreq, &ret);
+	TALLOC_FREE(subreq);
+	if (! status) {
+		tevent_req_error(req, ret);
+		return;
+	}
+
+	/* wait for the reply */
+}
+
+void ctdb_client_reply_call(struct ctdb_client_context *client,
+			    uint8_t *buf, size_t buflen, uint32_t reqid)
+{
+	struct ctdb_req_header h;
+	struct ctdb_client_call_state *state;
+	int ret;
+
+	state = reqid_find(client->idr, reqid, struct ctdb_client_call_state);
+	if (state == NULL) {
+		return;
+	}
+
+	if (reqid != state->reqid) {
+		return;
+	}
+
+	ret = ctdb_reply_call_pull(buf, buflen, &h, state, state->reply);
+	if (ret != 0) {
+		tevent_req_error(state->req, ret);
+		return;
+	}
+
+	tevent_req_done(state->req);
+}
+
+bool ctdb_client_call_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+			   struct ctdb_reply_call **reply, int *perr)
+{
+	struct ctdb_client_call_state *state = tevent_req_data(
+		req, struct ctdb_client_call_state);
+	int err;
+
+	if (tevent_req_is_unix_error(req, &err)) {
+		if (perr != NULL) {
+			*perr = err;
+		}
+		return false;
+	}
+
+	if (reply != NULL) {
+		*reply = talloc_steal(mem_ctx, state->reply);
+	}
+
+	return true;
+}