162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <errno.h>
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#include "hast.h"
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#include "hast_proto.h"
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#include "hooks.h"
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#include "nv.h"
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#include "pjdlog.h"
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#include "proto.h"
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#include "subr.h"
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#include "event.h"
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void
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event_send(const struct hast_resource *res, int event)
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{
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struct nv *nvin, *nvout;
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int error;
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PJDLOG_ASSERT(res != NULL);
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PJDLOG_ASSERT(event >= EVENT_MIN && event <= EVENT_MAX);
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nvin = nvout = NULL;
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/*
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* Prepare and send event to parent process.
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*/
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nvout = nv_alloc();
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nv_add_uint8(nvout, (uint8_t)event, "event");
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error = nv_error(nvout);
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if (error != 0) {
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pjdlog_common(LOG_ERR, 0, error,
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"Unable to prepare event header");
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goto done;
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}
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if (hast_proto_send(res, res->hr_event, nvout, NULL, 0) == -1) {
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pjdlog_errno(LOG_ERR, "Unable to send event header");
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goto done;
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}
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if (hast_proto_recv_hdr(res->hr_event, &nvin) == -1) {
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pjdlog_errno(LOG_ERR, "Unable to receive event header");
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goto done;
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}
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/*
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* Do nothing with the answer. We only wait for it to be sure not
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* to exit too quickly after sending an event and exiting immediately.
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*/
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done:
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if (nvin != NULL)
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nv_free(nvin);
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if (nvout != NULL)
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nv_free(nvout);
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}
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int
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event_recv(const struct hast_resource *res)
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{
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struct nv *nvin, *nvout;
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const char *evstr;
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uint8_t event;
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int error;
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PJDLOG_ASSERT(res != NULL);
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nvin = nvout = NULL;
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if (hast_proto_recv_hdr(res->hr_event, &nvin) == -1) {
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/*
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* First error log as debug. This is because worker process
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* most likely exited.
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*/
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pjdlog_common(LOG_DEBUG, 1, errno,
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"Unable to receive event header");
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goto fail;
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}
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event = nv_get_uint8(nvin, "event");
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if (event == EVENT_NONE) {
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pjdlog_error("Event header is missing 'event' field.");
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goto fail;
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}
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switch (event) {
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case EVENT_CONNECT:
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evstr = "connect";
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break;
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case EVENT_DISCONNECT:
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evstr = "disconnect";
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break;
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case EVENT_SYNCSTART:
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evstr = "syncstart";
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break;
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case EVENT_SYNCDONE:
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evstr = "syncdone";
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break;
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case EVENT_SYNCINTR:
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evstr = "syncintr";
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break;
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case EVENT_SPLITBRAIN:
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evstr = "split-brain";
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break;
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default:
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pjdlog_error("Event header contain invalid event number (%hhu).",
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event);
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goto fail;
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}
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pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role));
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hook_exec(res->hr_exec, evstr, res->hr_name, NULL);
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pjdlog_prefix_set("%s", "");
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nvout = nv_alloc();
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nv_add_int16(nvout, 0, "error");
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error = nv_error(nvout);
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if (error != 0) {
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pjdlog_common(LOG_ERR, 0, error,
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"Unable to prepare event header");
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goto fail;
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}
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if (hast_proto_send(res, res->hr_event, nvout, NULL, 0) == -1) {
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pjdlog_errno(LOG_ERR, "Unable to send event header");
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goto fail;
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}
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nv_free(nvin);
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nv_free(nvout);
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return (0);
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fail:
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if (nvin != NULL)
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nv_free(nvin);
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if (nvout != NULL)
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nv_free(nvout);
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return (-1);
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}
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