/* $Id: meatware.c,v 1.8.2.3 2005/08/19 16:19:01 sunjd Exp $ */
/*
* Stonith module for Human Operator Stonith device
*
* Copyright (c) 2001 Gregor Binder <gbinder@sysfive.com>
*
* This module is largely based on the "NULL Stonith device", written
* by Alan Robertson <alanr@unix.sh>, using code by David C. Teigland
* <teigland@sistina.com> originally appeared in the GFS stomith
* meatware agent.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <portability.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <syslog.h>
#include <libintl.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <glib.h>
#include <stonith/stonith.h>
#define PIL_PLUGINTYPE STONITH_TYPE
#define PIL_PLUGINTYPE_S STONITH_TYPE_S
#define PIL_PLUGIN meatware
#define PIL_PLUGIN_S "meatware"
#define PIL_PLUGINLICENSE LICENSE_LGPL
#define PIL_PLUGINLICENSEURL URL_LGPL
#include <pils/plugin.h>
/*
* meatwareclose is called as part of unloading the meatware STONITH plugin.
* If there was any global data allocated, or file descriptors opened, etc.
* which is associated with the plugin, and not a single interface
* in particular, here's our chance to clean it up.
*/
static void
meatwareclosepi(PILPlugin*pi)
{
}
/*
* meatwarecloseintf called as part of shutting down the meatware STONITH
* interface. If there was any global data allocated, or file descriptors
* opened, etc. which is associated with the meatware implementation,
* here's our chance to clean it up.
*/
static PIL_rc
meatwarecloseintf(PILInterface* pi, void* pd)
{
return PIL_OK;
}
static void * meatware_new(void);
static void meatware_destroy(Stonith *);
static int meatware_set_config_file(Stonith *, const char * cfgname);
static int meatware_set_config_info(Stonith *, const char * info);
static const char * meatware_getinfo(Stonith * s, int InfoType);
static int meatware_status(Stonith * );
static int meatware_reset_req(Stonith * s, int request, const char * host);
static char ** meatware_hostlist(Stonith *);
static void meatware_free_hostlist(char **);
static struct stonith_ops meatwareOps ={
meatware_new, /* Create new STONITH object */
meatware_destroy, /* Destroy STONITH object */
meatware_set_config_file, /* set configuration from file */
meatware_set_config_info, /* Get configuration from file */
meatware_getinfo, /* Return STONITH info string */
meatware_status, /* Return STONITH device status */
meatware_reset_req, /* Request a reset */
meatware_hostlist, /* Return list of supported hosts */
meatware_free_hostlist /* free above list */
};
static int WordCount(const char * s);
PIL_PLUGIN_BOILERPLATE("1.0", Debug, meatwareclosepi);
static const PILPluginImports* PluginImports;
static PILPlugin* OurPlugin;
static PILInterface* OurInterface;
static StonithImports* OurImports;
static void* interfprivate;
#define LOG PluginImports->log
#define MALLOC PluginImports->alloc
#define STRDUP PluginImports->mstrdup
#define FREE PluginImports->mfree
#define EXPECT_TOK OurImports->ExpectToken
#define STARTPROC OurImports->StartProcess
PIL_rc
PIL_PLUGIN_INIT(PILPlugin*us, const PILPluginImports* imports);
PIL_rc
PIL_PLUGIN_INIT(PILPlugin*us, const PILPluginImports* imports)
{
/* Force the compiler to do a little type checking */
(void)(PILPluginInitFun)PIL_PLUGIN_INIT;
PluginImports = imports;
OurPlugin = us;
/* Register ourself as a plugin */
imports->register_plugin(us, &OurPIExports);
/* Register our interface implementation */
return imports->register_interface(us, PIL_PLUGINTYPE_S
, PIL_PLUGIN_S
, &meatwareOps
, meatwarecloseintf /*close */
, &OurInterface
, (void*)&OurImports
, &interfprivate);
}
#define DEVICE "Meatware STONITH device"
#define WHITESPACE " \t\n\r\f"
/*
* Meatware STONITH device.
*/
struct MeatDevice {
const char * Meatid;
char ** hostlist;
int hostcount;
};
static const char * Meatid = "MeatwareDevice-Stonith";
static const char * NOTMeatID = "Hey, dummy this has been destroyed (MeatwareDev)";
#define ISMeatDEV(i) (((i)!= NULL && (i)->pinfo != NULL) \
&& ((struct MeatDevice *)(i->pinfo))->Meatid == Meatid)
#ifndef MALLOCT
# define MALLOCT(t) ((t *)(MALLOC(sizeof(t))))
#endif
#define N_(text) (text)
#define _(text) dgettext(ST_TEXTDOMAIN, text)
static int
meatware_status(Stonith *s)
{
if (!ISMeatDEV(s)) {
syslog(LOG_ERR, "invalid argument to Meatware_status");
return(S_OOPS);
}
return S_OK;
}
/*
* Return the list of hosts configured for this Meat device
*/
static char **
meatware_hostlist(Stonith *s)
{
int numnames = 0;
char ** ret = NULL;
struct MeatDevice* nd;
int j;
if (!ISMeatDEV(s)) {
syslog(LOG_ERR, "invalid argument to Meatware_list_hosts");
return(NULL);
}
nd = (struct MeatDevice*) s->pinfo;
if (nd->hostcount < 0) {
syslog(LOG_ERR
, "unconfigured stonith object in Meatware_list_hosts");
return(NULL);
}
numnames = nd->hostcount;
ret = (char **)MALLOC(numnames*sizeof(char*));
if (ret == NULL) {
syslog(LOG_ERR, "out of memory");
return ret;
}
memset(ret, 0, numnames*sizeof(char*));
for (j=0; j < numnames-1; ++j) {
ret[j] = STRDUP(nd->hostlist[j]);
if (ret[j] == NULL) {
meatware_free_hostlist(ret);
ret = NULL;
return ret;
}
}
return(ret);
}
static void
meatware_free_hostlist (char ** hlist)
{
char ** hl = hlist;
if (hl == NULL) {
return;
}
while (*hl) {
FREE(*hl);
*hl = NULL;
++hl;
}
FREE(hlist);
hlist = NULL;
}
static int
WordCount(const char * s)
{
int wc = 0;
if (!s) {
return wc;
}
do {
s += strspn(s, WHITESPACE);
if (*s) {
++wc;
s += strcspn(s, WHITESPACE);
}
}while (*s);
return(wc);
}
/*
* Parse the config information, and stash it away...
*/
static int
Meat_parse_config_info(struct MeatDevice* nd, const char * info)
{
char ** ret;
int wc;
int numnames;
const char * s = info;
int j;
if (nd->hostcount >= 0) {
return(S_OOPS);
}
wc = WordCount(info);
numnames = wc + 1;
ret = (char **)MALLOC(numnames*sizeof(char*));
if (ret == NULL) {
syslog(LOG_ERR, "out of memory");
return S_OOPS;
}
memset(ret, 0, numnames*sizeof(char*));
for (j=0; j < wc; ++j) {
s += strspn(s, WHITESPACE);
if (*s) {
const char * start = s;
s += strcspn(s, WHITESPACE);
ret[j] = MALLOC((1+(s-start))*sizeof(char));
if (ret[j] == NULL) {
meatware_free_hostlist(ret);
ret = NULL;
return S_OOPS;
}
strncpy(ret[j], start, (s-start));
g_strdown(ret[j]);
}
}
nd->hostlist = ret;
nd->hostcount = numnames;
return(S_OK);
}
/*
* Indicate that host must be power cycled manually.
*/
static int
meatware_reset_req(Stonith * s, int request, const char * host)
{
int fd, rc;
const char * meatpipe_pr = HA_VARRUNDIR"/meatware"; /* if you intend to
change this, modify
meatclient.c as well */
char line[256], meatpipe[256];
char resp_addr[50], resp_mw[50], resp_result[50];
char * shost;
if (!ISMeatDEV(s)) {
syslog(LOG_ERR, "invalid argument to %s", __FUNCTION__);
return(S_OOPS);
}
if ((shost = STRDUP(host)) == NULL) {
syslog(LOG_ERR, "strdup failed in %s", __FUNCTION__);
return(S_OOPS);
}
g_strdown(shost);
snprintf(meatpipe, 256, "%s.%s", meatpipe_pr, shost);
umask(0);
unlink(meatpipe);
rc = mkfifo(meatpipe, (S_IRUSR | S_IWUSR));
if (rc < 0) {
syslog(LOG_ERR, "cannot create FIFO for Meatware_reset_host");
rc = S_OOPS;
goto out;
}
syslog(LOG_CRIT, "OPERATOR INTERVENTION REQUIRED to reset %s.", host);
syslog(LOG_CRIT, "Run \"meatclient -c %s\" AFTER power-cycling the "
"machine.", shost);
fd = open(meatpipe, O_RDONLY);
if (fd < 0) {
syslog(LOG_ERR, "cannot open FIFO for Meatware_reset_host");
rc = S_OOPS;
goto out;
}
memset(line, 0, 256);
rc = read(fd, line, 256);
if (rc < 0) {
syslog(LOG_ERR, "read error on FIFO for Meatware_reset_host");
rc = S_OOPS;
goto out;
}
memset(resp_mw, 0, 50);
memset(resp_result, 0, 50);
memset(resp_addr, 0, 50);
sscanf(line, "%s %s %s", resp_mw, resp_result, resp_addr);
g_strdown(resp_addr);
if (strncmp(resp_mw, "meatware", 8) ||
strncmp(resp_result, "reply", 5) ||
strncmp(resp_addr, shost, strlen(resp_addr))) {
syslog(LOG_ERR, "failed to Meatware-reset node %s", shost);
rc = S_RESETFAIL;
goto out;
}
else {
syslog(LOG_INFO, _("node %s Meatware-reset."), shost);
unlink(meatpipe);
rc = S_OK;
}
out: free(shost);
return rc;
}
/*
* Parse the information in the given configuration file,
* and stash it away...
*/
static int
meatware_set_config_file(Stonith* s, const char * configname)
{
FILE * cfgfile;
char Meatline[256];
struct MeatDevice* nd;
if (!ISMeatDEV(s)) {
syslog(LOG_ERR, "invalid argument to Meatware_set_configfile");
return(S_OOPS);
}
nd = (struct MeatDevice*) s->pinfo;
if ((cfgfile = fopen(configname, "r")) == NULL) {
syslog(LOG_ERR, "cannot open %s", configname);
return(S_BADCONFIG);
}
while (fgets(Meatline, sizeof(Meatline), cfgfile) != NULL){
if (*Meatline == '#' || *Meatline == '\n' || *Meatline == EOS) {
continue;
}
return(Meat_parse_config_info(nd, Meatline));
}
return(S_BADCONFIG);
}
/*
* Parse the config information in the given string, and stash it away...
*/
static int
meatware_set_config_info(Stonith* s, const char * info)
{
struct MeatDevice* nd;
if (!ISMeatDEV(s)) {
syslog(LOG_ERR, "%s: invalid argument", __FUNCTION__);
return(S_OOPS);
}
nd = (struct MeatDevice *)s->pinfo;
return(Meat_parse_config_info(nd, info));
}
static const char *
meatware_getinfo(Stonith * s, int reqtype)
{
struct MeatDevice* nd;
char * ret;
if (!ISMeatDEV(s)) {
syslog(LOG_ERR, "Meatware_idinfo: invalid argument");
return NULL;
}
/*
* We look in the ST_TEXTDOMAIN catalog for our messages
*/
nd = (struct MeatDevice *)s->pinfo;
switch (reqtype) {
case ST_DEVICEID:
ret = _("Meatware STONITH device");
break;
case ST_CONF_INFO_SYNTAX:
ret = _("hostname ...\n"
"host names are white-space delimited.");
break;
case ST_CONF_FILE_SYNTAX:
ret = _("hostname...\n"
"host names are white-space delimited. "
"All host names must be on one line. "
"Blank lines and lines beginning with # are ignored");
break;
case ST_DEVICEDESCR:
ret = _("Human (meatware) intervention STONITH device.\n"
"This STONITH agent prompts a human to reset a machine.\n"
"The human tells it when the reset was completed.");
break;
default:
ret = NULL;
break;
}
return ret;
}
/*
* Meat Stonith destructor...
*/
static void
meatware_destroy(Stonith *s)
{
struct MeatDevice* nd;
if (!ISMeatDEV(s)) {
syslog(LOG_ERR, "%s: invalid argument", __FUNCTION__);
return;
}
nd = (struct MeatDevice *)s->pinfo;
nd->Meatid = NOTMeatID;
if (nd->hostlist) {
meatware_free_hostlist(nd->hostlist);
nd->hostlist = NULL;
}
nd->hostcount = -1;
FREE(nd);
}
/* Create a new Meatware Stonith device. */
static void *
meatware_new(void)
{
struct MeatDevice* nd = MALLOCT(struct MeatDevice);
if (nd == NULL) {
syslog(LOG_ERR, "out of memory");
return(NULL);
}
memset(nd, 0, sizeof(*nd));
nd->Meatid = Meatid;
nd->hostlist = NULL;
nd->hostcount = -1;
return((void *)nd);
}
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