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