2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
35 #include "hast_proto.h"
45 event_send(const struct hast_resource *res, int event)
47 struct nv *nvin, *nvout;
50 PJDLOG_ASSERT(res != NULL);
51 PJDLOG_ASSERT(event >= EVENT_MIN && event <= EVENT_MAX);
56 * Prepare and send event to parent process.
59 nv_add_uint8(nvout, (uint8_t)event, "event");
60 error = nv_error(nvout);
62 pjdlog_common(LOG_ERR, 0, error,
63 "Unable to prepare event header");
66 if (hast_proto_send(res, res->hr_event, nvout, NULL, 0) == -1) {
67 pjdlog_errno(LOG_ERR, "Unable to send event header");
70 if (hast_proto_recv_hdr(res->hr_event, &nvin) == -1) {
71 pjdlog_errno(LOG_ERR, "Unable to receive event header");
75 * Do nothing with the answer. We only wait for it to be sure not
76 * to exit too quickly after sending an event and exiting immediately.
86 event_recv(const struct hast_resource *res)
88 struct nv *nvin, *nvout;
93 PJDLOG_ASSERT(res != NULL);
97 if (hast_proto_recv_hdr(res->hr_event, &nvin) == -1) {
99 * First error log as debug. This is because worker process
100 * most likely exited.
102 pjdlog_common(LOG_DEBUG, 1, errno,
103 "Unable to receive event header");
107 event = nv_get_uint8(nvin, "event");
108 if (event == EVENT_NONE) {
109 pjdlog_error("Event header is missing 'event' field.");
117 case EVENT_DISCONNECT:
118 evstr = "disconnect";
120 case EVENT_SYNCSTART:
129 case EVENT_SPLITBRAIN:
130 evstr = "split-brain";
133 pjdlog_error("Event header contain invalid event number (%hhu).",
138 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role));
139 hook_exec(res->hr_exec, evstr, res->hr_name, NULL);
140 pjdlog_prefix_set("%s", "");
143 nv_add_int16(nvout, 0, "error");
144 error = nv_error(nvout);
146 pjdlog_common(LOG_ERR, 0, error,
147 "Unable to prepare event header");
150 if (hast_proto_send(res, res->hr_event, nvout, NULL, 0) == -1) {
151 pjdlog_errno(LOG_ERR, "Unable to send event header");