1212049Spjd/*- 2212049Spjd * Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3212049Spjd * All rights reserved. 4212049Spjd * 5212049Spjd * Redistribution and use in source and binary forms, with or without 6212049Spjd * modification, are permitted provided that the following conditions 7212049Spjd * are met: 8212049Spjd * 1. Redistributions of source code must retain the above copyright 9212049Spjd * notice, this list of conditions and the following disclaimer. 10212049Spjd * 2. Redistributions in binary form must reproduce the above copyright 11212049Spjd * notice, this list of conditions and the following disclaimer in the 12212049Spjd * documentation and/or other materials provided with the distribution. 13212049Spjd * 14212049Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15212049Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16212049Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17212049Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18212049Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19212049Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20212049Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21212049Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22212049Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23212049Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24212049Spjd * SUCH DAMAGE. 25212049Spjd */ 26212049Spjd 27212049Spjd#include <sys/cdefs.h> 28212049Spjd__FBSDID("$FreeBSD$"); 29212049Spjd 30212049Spjd#include <errno.h> 31212049Spjd 32212049Spjd#include "hast.h" 33212049Spjd#include "hast_proto.h" 34212049Spjd#include "hooks.h" 35212049Spjd#include "nv.h" 36212049Spjd#include "pjdlog.h" 37212049Spjd#include "proto.h" 38212049Spjd#include "subr.h" 39212049Spjd 40212049Spjd#include "event.h" 41212049Spjd 42212049Spjdvoid 43212049Spjdevent_send(const struct hast_resource *res, int event) 44212049Spjd{ 45212049Spjd struct nv *nvin, *nvout; 46212049Spjd int error; 47212049Spjd 48225787Spjd PJDLOG_ASSERT(res != NULL); 49225787Spjd PJDLOG_ASSERT(event >= EVENT_MIN && event <= EVENT_MAX); 50212049Spjd 51212049Spjd nvin = nvout = NULL; 52212049Spjd 53212049Spjd /* 54212049Spjd * Prepare and send event to parent process. 55212049Spjd */ 56212049Spjd nvout = nv_alloc(); 57212049Spjd nv_add_uint8(nvout, (uint8_t)event, "event"); 58212049Spjd error = nv_error(nvout); 59212049Spjd if (error != 0) { 60212049Spjd pjdlog_common(LOG_ERR, 0, error, 61212049Spjd "Unable to prepare event header"); 62212049Spjd goto done; 63212049Spjd } 64229945Spjd if (hast_proto_send(res, res->hr_event, nvout, NULL, 0) == -1) { 65212049Spjd pjdlog_errno(LOG_ERR, "Unable to send event header"); 66212049Spjd goto done; 67212049Spjd } 68229945Spjd if (hast_proto_recv_hdr(res->hr_event, &nvin) == -1) { 69212049Spjd pjdlog_errno(LOG_ERR, "Unable to receive event header"); 70212049Spjd goto done; 71212049Spjd } 72212049Spjd /* 73212049Spjd * Do nothing with the answer. We only wait for it to be sure not 74212049Spjd * to exit too quickly after sending an event and exiting immediately. 75212049Spjd */ 76212049Spjddone: 77212049Spjd if (nvin != NULL) 78212049Spjd nv_free(nvin); 79212049Spjd if (nvout != NULL) 80212049Spjd nv_free(nvout); 81212049Spjd} 82212049Spjd 83212049Spjdint 84212049Spjdevent_recv(const struct hast_resource *res) 85212049Spjd{ 86212049Spjd struct nv *nvin, *nvout; 87212049Spjd const char *evstr; 88212049Spjd uint8_t event; 89212049Spjd int error; 90212049Spjd 91225787Spjd PJDLOG_ASSERT(res != NULL); 92212049Spjd 93212049Spjd nvin = nvout = NULL; 94212049Spjd 95229945Spjd if (hast_proto_recv_hdr(res->hr_event, &nvin) == -1) { 96212049Spjd /* 97212049Spjd * First error log as debug. This is because worker process 98212049Spjd * most likely exited. 99212049Spjd */ 100212049Spjd pjdlog_common(LOG_DEBUG, 1, errno, 101212049Spjd "Unable to receive event header"); 102212049Spjd goto fail; 103212049Spjd } 104212049Spjd 105212049Spjd event = nv_get_uint8(nvin, "event"); 106212049Spjd if (event == EVENT_NONE) { 107212049Spjd pjdlog_error("Event header is missing 'event' field."); 108212049Spjd goto fail; 109212049Spjd } 110212049Spjd 111212049Spjd switch (event) { 112212049Spjd case EVENT_CONNECT: 113212049Spjd evstr = "connect"; 114212049Spjd break; 115212049Spjd case EVENT_DISCONNECT: 116212049Spjd evstr = "disconnect"; 117212049Spjd break; 118212049Spjd case EVENT_SYNCSTART: 119212049Spjd evstr = "syncstart"; 120212049Spjd break; 121212049Spjd case EVENT_SYNCDONE: 122212049Spjd evstr = "syncdone"; 123212049Spjd break; 124212049Spjd case EVENT_SYNCINTR: 125212049Spjd evstr = "syncintr"; 126212049Spjd break; 127212049Spjd case EVENT_SPLITBRAIN: 128212049Spjd evstr = "split-brain"; 129212049Spjd break; 130212049Spjd default: 131212049Spjd pjdlog_error("Event header contain invalid event number (%hhu).", 132212049Spjd event); 133212049Spjd goto fail; 134212049Spjd } 135212049Spjd 136212049Spjd pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role)); 137212049Spjd hook_exec(res->hr_exec, evstr, res->hr_name, NULL); 138212049Spjd pjdlog_prefix_set("%s", ""); 139212049Spjd 140212049Spjd nvout = nv_alloc(); 141212049Spjd nv_add_int16(nvout, 0, "error"); 142212049Spjd error = nv_error(nvout); 143212049Spjd if (error != 0) { 144212049Spjd pjdlog_common(LOG_ERR, 0, error, 145212049Spjd "Unable to prepare event header"); 146212049Spjd goto fail; 147212049Spjd } 148229945Spjd if (hast_proto_send(res, res->hr_event, nvout, NULL, 0) == -1) { 149212049Spjd pjdlog_errno(LOG_ERR, "Unable to send event header"); 150212049Spjd goto fail; 151212049Spjd } 152212049Spjd nv_free(nvin); 153212049Spjd nv_free(nvout); 154212049Spjd return (0); 155212049Spjdfail: 156212049Spjd if (nvin != NULL) 157212049Spjd nv_free(nvin); 158212049Spjd if (nvout != NULL) 159212049Spjd nv_free(nvout); 160212049Spjd return (-1); 161212049Spjd} 162