No OneTemporary
Actions

Size

61 KB

Referenced Files

None

Subscribers

None

View Options

	diff --git a/lib/fencing/st_client.c b/lib/fencing/st_client.c
	index 833e1e7c17..04976f666f 100644
	--- a/lib/fencing/st_client.c
	+++ b/lib/fencing/st_client.c
	@@ -1,2008 +1,2018 @@
	/*
	* Copyright (c) 2004 Andrew Beekhof <andrew@beekhof.net>
	*
	* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*
	*/
	#include <crm_internal.h>
	#include <unistd.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <stdarg.h>
	#include <string.h>
	#include <ctype.h>

	#include <sys/stat.h>
	#include <sys/types.h>
	#include <sys/wait.h>

	#include <glib.h>
	#include <dirent.h>
	#include <libgen.h> /* Add it for compiling on OSX */

	#include <crm/crm.h>
	#include <crm/stonith-ng.h>
	#include <crm/fencing/internal.h>
	#include <crm/msg_xml.h>
	#include <crm/common/xml.h>

	#ifdef HAVE_STONITH_STONITH_H
	# include <stonith/stonith.h>
	# define LHA_STONITH_LIBRARY "libstonith.so.1"
	static void *lha_agents_lib = NULL;
	#endif

	#include <crm/common/mainloop.h>


	CRM_TRACE_INIT_DATA(stonith);

	typedef struct stonith_private_s {
	char *token;
	crm_ipc_t *ipc;
	mainloop_io_t *source;
	GHashTable *stonith_op_callback_table;
	GList *notify_list;

	void (op_callback) (stonith_t st, const xmlNode * msg, int call, int rc, xmlNode * output,
	void *userdata);

	} stonith_private_t;

	typedef struct stonith_notify_client_s {
	const char *event;
	const char obj_id; / implement one day */
	const char obj_type; / implement one day */
	void (notify) (stonith_t st, stonith_event_t *e);

	} stonith_notify_client_t;

	typedef struct stonith_callback_client_s {
	void (callback) (stonith_t st, const xmlNode * msg, int call, int rc, xmlNode * output,
	void *userdata);
	const char *id;
	void *user_data;
	gboolean only_success;
	struct timer_rec_s *timer;

	} stonith_callback_client_t;

	struct notify_blob_s {
	stonith_t *stonith;
	xmlNode *xml;
	};

	struct timer_rec_s {
	int call_id;
	int timeout;
	guint ref;
	stonith_t *stonith;
	};

	typedef int (stonith_op_t) (const char , int, const char , xmlNode ,
	xmlNode , xmlNode , xmlNode , xmlNode );

	static const char META_TEMPLATE[] =
	"<?xml version=\"1.0\"?>\n"
	"<!DOCTYPE resource-agent SYSTEM \"ra-api-1.dtd\">\n"
	"<resource-agent name=\"%s\">\n"
	" <version>1.0</version>\n"
	" <longdesc lang=\"en\">\n"
	"%s\n"
	" </longdesc>\n"
	" <shortdesc lang=\"en\">%s</shortdesc>\n"
	"%s\n"
	" <actions>\n"
	" <action name=\"start\" timeout=\"20\" />\n"
	" <action name=\"stop\" timeout=\"15\" />\n"
	" <action name=\"status\" timeout=\"20\" />\n"
	" <action name=\"monitor\" timeout=\"20\" interval=\"3600\"/>\n"
	" <action name=\"meta-data\" timeout=\"15\" />\n"
	" </actions>\n"
	" <special tag=\"heartbeat\">\n"
	" <version>2.0</version>\n" " </special>\n" "</resource-agent>\n";

	bool stonith_dispatch(stonith_t * st);
	int stonith_dispatch_internal(const char *buffer, ssize_t length, gpointer userdata);
	void stonith_perform_callback(stonith_t * stonith, xmlNode * msg, int call_id, int rc);
	xmlNode stonith_create_op(int call_id, const char token, const char op, xmlNode data,
	int call_options);
	int stonith_send_command(stonith_t * stonith, const char op, xmlNode data,
	xmlNode ** output_data, int call_options, int timeout);

	static void stonith_connection_destroy(gpointer user_data);
	static void stonith_send_notification(gpointer data, gpointer user_data);

	static void
	stonith_connection_destroy(gpointer user_data)
	{
	stonith_t *stonith = user_data;
	stonith_private_t *native = NULL;
	struct notify_blob_s blob;

	crm_trace("Sending destroyed notification");
	blob.stonith = stonith;
	blob.xml = create_xml_node(NULL, "notify");

	native = stonith->private;
	native->ipc = NULL;
	native->source = NULL;

	stonith->state = stonith_disconnected;
	crm_xml_add(blob.xml, F_TYPE, T_STONITH_NOTIFY);
	crm_xml_add(blob.xml, F_SUBTYPE, T_STONITH_NOTIFY_DISCONNECT);

	g_list_foreach(native->notify_list, stonith_send_notification, &blob);
	free_xml(blob.xml);
	}

	xmlNode *
	create_device_registration_xml(const char id, const char namespace, const char *agent,
	stonith_key_value_t * params)
	{
	xmlNode *data = create_xml_node(NULL, F_STONITH_DEVICE);
	xmlNode *args = create_xml_node(data, XML_TAG_ATTRS);

	crm_xml_add(data, XML_ATTR_ID, id);
	crm_xml_add(data, "origin", __FUNCTION__);
	crm_xml_add(data, "agent", agent);
	crm_xml_add(data, "namespace", namespace);

	for (; params; params = params->next) {
	hash2field((gpointer) params->key, (gpointer) params->value, args);
	}

	return data;
	}

	static int
	stonith_api_register_device(stonith_t * st, int call_options,
	const char id, const char namespace, const char *agent,
	stonith_key_value_t * params)
	{
	int rc = 0;
	- xmlNode *data = create_device_registration_xml(id, namespace, agent, params);
	+ xmlNode *data = NULL;
	+
	+#if HAVE_STONITH_STONITH_H
	+ namespace = get_stonith_provider(agent, namespace);
	+ if (strcmp(namespace, "heartbeat") == 0) {
	+ stonith_key_value_add(params, "plugin", agent);
	+ agent = "fence_legacy";
	+ }
	+#endif
	+
	+ data = create_device_registration_xml(id, namespace, agent, params);

	rc = stonith_send_command(st, STONITH_OP_DEVICE_ADD, data, NULL, call_options, 0);
	free_xml(data);

	return rc;
	}

	static int
	stonith_api_remove_device(stonith_t * st, int call_options, const char *name)
	{
	int rc = 0;
	xmlNode *data = NULL;

	data = create_xml_node(NULL, F_STONITH_DEVICE);
	crm_xml_add(data, "origin", __FUNCTION__);
	crm_xml_add(data, XML_ATTR_ID, name);
	rc = stonith_send_command(st, STONITH_OP_DEVICE_DEL, data, NULL, call_options, 0);
	free_xml(data);

	return rc;
	}

	static int
	stonith_api_remove_level(stonith_t * st, int options, const char *node, int level)
	{
	int rc = 0;
	xmlNode *data = NULL;

	data = create_xml_node(NULL, F_STONITH_LEVEL);
	crm_xml_add(data, "origin", __FUNCTION__);
	crm_xml_add(data, F_STONITH_TARGET, node);
	crm_xml_add_int(data, XML_ATTR_ID, level);
	rc = stonith_send_command(st, STONITH_OP_LEVEL_DEL, data, NULL, options, 0);
	free_xml(data);

	return rc;
	}

	xmlNode *
	create_level_registration_xml(const char node, int level, stonith_key_value_t device_list)
	{
	xmlNode *data = create_xml_node(NULL, F_STONITH_LEVEL);

	crm_xml_add_int(data, XML_ATTR_ID, level);
	crm_xml_add(data, F_STONITH_TARGET, node);
	crm_xml_add(data, "origin", __FUNCTION__);

	for (; device_list; device_list = device_list->next) {
	xmlNode *dev = create_xml_node(data, F_STONITH_DEVICE);

	crm_xml_add(dev, XML_ATTR_ID, device_list->value);
	}

	return data;
	}

	static int
	stonith_api_register_level(stonith_t * st, int options, const char *node, int level,
	stonith_key_value_t * device_list)
	{
	int rc = 0;
	xmlNode *data = create_level_registration_xml(node, level, device_list);

	rc = stonith_send_command(st, STONITH_OP_LEVEL_ADD, data, NULL, options, 0);
	free_xml(data);

	return rc;
	}

	static void
	append_arg(gpointer key, gpointer value, gpointer user_data)
	{
	int len = 3; /* =, \n, \0 */
	int last = 0;
	char **args = user_data;

	CRM_CHECK(key != NULL, return);
	CRM_CHECK(value != NULL, return);

	if (strstr(key, "pcmk_")) {
	return;
	} else if (strstr(key, CRM_META)) {
	return;
	} else if (safe_str_eq(key, "crm_feature_set")) {
	return;
	}

	len += strlen(key);
	len += strlen(value);
	if (*args != NULL) {
	last = strlen(*args);
	}

	args = realloc(args, last + len);
	crm_trace("Appending: %s=%s", (char )key, (char )value);
	sprintf((args) + last, "%s=%s\n", (char )key, (char *)value);
	}

	static void
	append_const_arg(const char key, const char value, char **arg_list)
	{
	char *glib_sucks_key = strdup(key);
	char *glib_sucks_value = strdup(value);

	append_arg(glib_sucks_key, glib_sucks_value, arg_list);

	free(glib_sucks_value);
	free(glib_sucks_key);
	}

	static void
	append_host_specific_args(const char victim, const char map, GHashTable * params, char **arg_list)
	{
	char *name = NULL;
	int last = 0, lpc = 0, max = 0;

	if (map == NULL) {
	/* The best default there is for now... */
	crm_debug("Using default arg map: port=uname");
	append_const_arg("port", victim, arg_list);
	return;
	}

	max = strlen(map);
	crm_debug("Processing arg map: %s", map);
	for (; lpc < max + 1; lpc++) {
	if (isalpha(map[lpc])) {
	/* keep going */

	} else if (map[lpc] == '=' \|\| map[lpc] == ':') {
	free(name);
	name = calloc(1, 1 + lpc - last);
	memcpy(name, map + last, lpc - last);
	crm_debug("Got name: %s", name);
	last = lpc + 1;

	} else if (map[lpc] == 0 \|\| map[lpc] == ',' \|\| isspace(map[lpc])) {
	char *param = NULL;
	const char *value = NULL;

	param = calloc(1, 1 + lpc - last);
	memcpy(param, map + last, lpc - last);
	last = lpc + 1;

	crm_debug("Got key: %s", param);
	if (name == NULL) {
	crm_err("Misparsed '%s', found '%s' without a name", map, param);
	free(param);
	continue;
	}

	if (safe_str_eq(param, "uname")) {
	value = victim;
	} else {
	char *key = crm_meta_name(param);

	value = g_hash_table_lookup(params, key);
	free(key);
	}

	if (value) {
	crm_debug("Setting '%s'='%s' (%s) for %s", name, value, param, victim);
	append_const_arg(name, value, arg_list);

	} else {
	crm_err("No node attribute '%s' for '%s'", name, victim);
	}

	free(name);
	name = NULL;
	free(param);
	if (map[lpc] == 0) {
	break;
	}

	} else if (isspace(map[lpc])) {
	last = lpc;
	}
	}
	free(name);
	}

	static char *
	make_args(const char action, const char victim, GHashTable * device_args, GHashTable * port_map)
	{
	char buffer[512];
	char *arg_list = NULL;
	const char *value = NULL;

	CRM_CHECK(action != NULL, return NULL);

	if (device_args) {
	g_hash_table_foreach(device_args, append_arg, &arg_list);
	}

	buffer[511] = 0;
	snprintf(buffer, 511, "pcmk_%s_action", action);
	if (device_args) {
	value = g_hash_table_lookup(device_args, buffer);
	}

	if (value == NULL && device_args) {
	/* Legacy support for early 1.1 releases - Remove for 1.2 */
	snprintf(buffer, 511, "pcmk_%s_cmd", action);
	value = g_hash_table_lookup(device_args, buffer);
	}

	if (value) {
	crm_info("Substituting action '%s' for requested operation '%s'", value, action);
	action = value;
	}

	append_const_arg(STONITH_ATTR_ACTION_OP, action, &arg_list);
	if (victim && device_args) {
	const char *alias = victim;
	const char *param = g_hash_table_lookup(device_args, STONITH_ATTR_HOSTARG);

	if (port_map && g_hash_table_lookup(port_map, victim)) {
	alias = g_hash_table_lookup(port_map, victim);
	}

	/* Always supply the node's name too:
	* https://fedorahosted.org/cluster/wiki/FenceAgentAPI
	*/
	append_const_arg("nodename", victim, &arg_list);

	/* Check if we need to supply the victim in any other form */
	if (param == NULL) {
	const char *map = g_hash_table_lookup(device_args, STONITH_ATTR_ARGMAP);

	if (map == NULL) {
	param = "port";
	value = g_hash_table_lookup(device_args, param);

	} else {
	/* Legacy handling */
	append_host_specific_args(alias, map, device_args, &arg_list);
	value = map; /* Nothing more to do */
	}

	} else if (safe_str_eq(param, "none")) {
	value = param; /* Nothing more to do */

	} else {
	value = g_hash_table_lookup(device_args, param);
	}

	/* Don't overwrite explictly set values for $param */
	if (value == NULL \|\| safe_str_eq(value, "dynamic")) {
	crm_debug("Performing %s action for node '%s' as '%s=%s'", action, victim, param,
	alias);
	append_const_arg(param, alias, &arg_list);
	}
	}

	crm_trace("Calculated: %s", arg_list);
	return arg_list;
	}

	static gboolean
	st_child_term(gpointer data)
	{
	int rc = 0;
	async_command_t * track = data;
	crm_info("Child %d timed out, sending SIGTERM", track->pid);
	track->timer_sigterm = 0;
	rc = kill(track->pid, SIGTERM);
	if(rc < 0) {
	crm_perror(LOG_ERR, "Couldn't send SIGTERM to %d", track->pid);
	}
	return FALSE;
	}

	static gboolean
	st_child_kill(gpointer data)
	{
	int rc = 0;
	async_command_t * track = data;
	crm_info("Child %d timed out, sending SIGKILL", track->pid);
	track->timer_sigkill = 0;
	rc = kill(track->pid, SIGKILL);
	if(rc < 0) {
	crm_perror(LOG_ERR, "Couldn't send SIGKILL to %d", track->pid);
	}
	return FALSE;
	}

	/* Borrowed from libfence and extended */
	int
	run_stonith_agent(const char agent, const char action, const char *victim,
	GHashTable * device_args, GHashTable * port_map, int agent_result, char *output,
	async_command_t * track)
	{
	char *args = make_args(action, victim, device_args, port_map);
	int pid, status, len, rc = -EPROTO;
	int p_read_fd, p_write_fd; /* parent read/write file descriptors */
	int c_read_fd, c_write_fd; /* child read/write file descriptors */
	int fd1[2];
	int fd2[2];

	c_read_fd = c_write_fd = p_read_fd = p_write_fd = -1;

	if (args == NULL \|\| agent == NULL)
	goto fail;
	len = strlen(args);

	if (pipe(fd1))
	goto fail;
	p_read_fd = fd1[0];
	c_write_fd = fd1[1];

	if (pipe(fd2))
	goto fail;
	c_read_fd = fd2[0];
	p_write_fd = fd2[1];

	crm_debug("forking");
	pid = fork();
	if (pid < 0) {
	rc = -ECHILD;
	goto fail;
	}

	if (pid) {
	/* parent */
	int ret;
	int total = 0;

	fcntl(p_read_fd, F_SETFL, fcntl(p_read_fd, F_GETFL, 0) \| O_NONBLOCK);

	do {
	crm_debug("sending args");
	ret = write(p_write_fd, args + total, len - total);
	if (ret > 0) {
	total += ret;
	}

	} while (errno == EINTR && total < len);

	if (total != len) {
	crm_perror(LOG_ERR, "Sent %d not %d bytes", total, len);
	if (ret >= 0) {
	rc = -EREMOTEIO;
	}
	goto fail;
	}

	close(p_write_fd);

	if (track && track->done) {
	track->stdout = p_read_fd;
	g_child_watch_add(pid, track->done, track);
	crm_trace("Op: %s on %s, pid: %d, timeout: %ds", action, agent, pid, track->timeout);

	if (track->timeout) {
	track->pid = pid;
	track->timer_sigterm = g_timeout_add(1000*track->timeout, st_child_term, track);
	track->timer_sigkill = g_timeout_add(1000*(track->timeout+5), st_child_kill, track);

	} else {
	crm_err("No timeout set for stonith operation %s with device %s", action, agent);
	}

	close(c_write_fd);
	close(c_read_fd);
	free(args);
	return pid;

	} else {
	pid_t p;

	do {
	p = waitpid(pid, &status, 0);
	} while (p < 0 && errno == EINTR);

	if (p < 0) {
	crm_perror(LOG_ERR, "waitpid(%d)", pid);

	} else if (p != pid) {
	crm_err("Waited for %d, got %d", pid, p);
	}

	if (output != NULL) {
	char *local_copy;
	int lpc = 0, last = 0, more;
	len = 0;
	do {
	char buf[500];

	ret = read(p_read_fd, buf, 500);
	if (ret > 0) {
	buf[ret] = 0;
	output = realloc(output, len + ret + 1);
	sprintf((*output) + len, "%s", buf);
	crm_trace("%d: %s", ret, (*output) + len);
	len += ret;
	}

	} while (ret == 500 \|\| (ret < 0 && errno == EINTR));

	if (*output) {
	local_copy = strdup(*output);
	more = strlen(local_copy);
	for(lpc = 0; lpc < more; lpc++) {
	if(local_copy[lpc] == '\n' \|\| local_copy[lpc] == 0) {
	local_copy[lpc] = 0;
	crm_debug("%s: %s", agent, local_copy+last);
	last = lpc+1;
	}
	}
	crm_debug("%s: %s (total %d bytes)", agent, local_copy+last, more);
	free(local_copy);
	}
	}

	rc = -ECONNABORTED;
	*agent_result = -ECONNABORTED;
	if (WIFEXITED(status)) {
	crm_debug("result = %d", WEXITSTATUS(status));
	*agent_result = -WEXITSTATUS(status);
	rc = 0;

	} else if (WIFSIGNALED(status)) {
	crm_err("call %s for %s exited due to signal %d", action, agent, WTERMSIG(status));

	} else {
	crm_err("call %s for %s exited abnormally. stopped=%d, continued=%d",
	action, agent, WIFSTOPPED(status), WIFCONTINUED(status));
	}
	}

	} else {
	/* child */

	close(1);
	/* coverity[leaked_handle] False positive */
	if (dup(c_write_fd) < 0)
	goto fail;
	close(2);
	/* coverity[leaked_handle] False positive */
	if (dup(c_write_fd) < 0)
	goto fail;
	close(0);
	/* coverity[leaked_handle] False positive */
	if (dup(c_read_fd) < 0)
	goto fail;

	/* keep c_write_fd open so parent can report all errors. */
	close(c_read_fd);
	close(p_read_fd);
	close(p_write_fd);

	execlp(agent, agent, NULL);
	exit(EXIT_FAILURE);
	}

	fail:
	free(args);

	if (p_read_fd >= 0) {
	close(p_read_fd);
	}
	if (p_write_fd >= 0) {
	close(p_write_fd);
	}

	if (c_read_fd >= 0) {
	close(c_read_fd);
	}
	if (c_write_fd >= 0) {
	close(c_write_fd);
	}

	return rc;
	}

	static int
	stonith_api_device_list(stonith_t * stonith, int call_options, const char *namespace,
	stonith_key_value_t ** devices, int timeout)
	{
	int count = 0;

	if (devices == NULL) {
	crm_err("Parameter error: stonith_api_device_list");
	return -EFAULT;
	}

	/* Include Heartbeat agents */
	if (namespace == NULL \|\| safe_str_eq("heartbeat", namespace)) {
	#if HAVE_STONITH_STONITH_H
	static gboolean need_init = TRUE;

	char **entry = NULL;
	char **type_list = NULL;
	static char *(type_list_fn) (void) = NULL;
	static void (type_free_fn) (char *) = NULL;

	if(need_init) {
	need_init = FALSE;
	type_list_fn = find_library_function(&lha_agents_lib, LHA_STONITH_LIBRARY, "stonith_types", FALSE);
	type_free_fn = find_library_function(&lha_agents_lib, LHA_STONITH_LIBRARY, "stonith_free_hostlist", FALSE);
	}

	if(type_list_fn) {
	type_list = (*type_list_fn)();
	}

	for (entry = type_list; entry != NULL && *entry; ++entry) {
	crm_trace("Added: %s", *entry);
	devices = stonith_key_value_add(devices, NULL, *entry);
	count++;
	}
	if (type_list && type_free_fn) {
	(*type_free_fn)(type_list);
	}
	#else
	if(namespace != NULL) {
	return -EINVAL; /* Heartbeat agents not supported */
	}
	#endif
	}

	/* Include Red Hat agents, basically: ls -1 @sbin_dir@/fence_* */
	if (namespace == NULL \|\| safe_str_eq("redhat", namespace)) {
	struct dirent **namelist;
	int file_num = scandir(RH_STONITH_DIR, &namelist, 0, alphasort);

	if (file_num > 0) {
	struct stat prop;
	char buffer[FILENAME_MAX + 1];

	while (file_num--) {
	if ('.' == namelist[file_num]->d_name[0]) {
	free(namelist[file_num]);
	continue;

	} else if (0 != strncmp(RH_STONITH_PREFIX,
	namelist[file_num]->d_name, strlen(RH_STONITH_PREFIX))) {
	free(namelist[file_num]);
	continue;
	}

	snprintf(buffer, FILENAME_MAX, "%s/%s", RH_STONITH_DIR, namelist[file_num]->d_name);
	if (stat(buffer, &prop) == 0 && S_ISREG(prop.st_mode)) {
	devices = stonith_key_value_add(devices, NULL, namelist[file_num]->d_name);
	count++;
	}

	free(namelist[file_num]);
	}
	free(namelist);
	}
	}

	return count;
	}

	static int
	stonith_api_device_metadata(stonith_t * stonith, int call_options, const char *agent,
	const char namespace, char *output, int timeout)
	{
	int rc = 0;
	char *buffer = NULL;
	const char *provider = get_stonith_provider(agent, namespace);

	crm_trace("looking up %s/%s metadata", agent, provider);

	/* By having this in a library, we can access it from stonith_admin
	* when neither lrmd or stonith-ng are running
	* Important for the crm shell's validations...
	*/

	if (safe_str_eq(provider, "redhat")) {

	int exec_rc = run_stonith_agent(agent, "metadata", NULL, NULL, NULL, &rc, &buffer, NULL);

	if (exec_rc < 0 \|\| rc != 0 \|\| buffer == NULL) {
	crm_debug("Query failed: %d %d: %s", exec_rc, rc, crm_str(buffer));
	free(buffer); /* Just in case */
	return -EINVAL;

	} else {

	xmlNode *xml = string2xml(buffer);
	xmlNode *actions = NULL;
	xmlXPathObject *xpathObj = NULL;

	xpathObj = xpath_search(xml, "//actions");
	if (xpathObj && xpathObj->nodesetval->nodeNr > 0) {
	actions = getXpathResult(xpathObj, 0);
	}

	/* Now fudge the metadata so that the start/stop actions appear */
	xpathObj = xpath_search(xml, "//action[@name='stop']");
	if (xpathObj == NULL \|\| xpathObj->nodesetval->nodeNr <= 0) {
	xmlNode *tmp = NULL;

	tmp = create_xml_node(actions, "action");
	crm_xml_add(tmp, "name", "stop");
	crm_xml_add(tmp, "timeout", "20s");

	tmp = create_xml_node(actions, "action");
	crm_xml_add(tmp, "name", "start");
	crm_xml_add(tmp, "timeout", "20s");
	}

	/* Now fudge the metadata so that the port isn't required in the configuration */
	xpathObj = xpath_search(xml, "//parameter[@name='port']");
	if (xpathObj && xpathObj->nodesetval->nodeNr > 0) {
	/* We'll fill this in */
	xmlNode *tmp = getXpathResult(xpathObj, 0);

	crm_xml_add(tmp, "required", "0");
	}

	free(buffer);
	buffer = dump_xml_formatted(xml);
	free_xml(xml);
	}

	} else {
	#if !HAVE_STONITH_STONITH_H
	return -EINVAL; /* Heartbeat agents not supported */
	#else
	int bufferlen = 0;

	char *xml_meta_longdesc = NULL;
	char *xml_meta_shortdesc = NULL;

	char *meta_param = NULL;
	char *meta_longdesc = NULL;
	char *meta_shortdesc = NULL;
	static const char *no_parameter_info = "<!-- no value -->";

	Stonith *stonith_obj = NULL;

	static gboolean need_init = TRUE;
	static Stonith (st_new_fn) (const char *) = NULL;
	static const char (st_info_fn) (Stonith *, int) = NULL;
	static void (st_del_fn) (Stonith ) = NULL;

	if(need_init) {
	need_init = FALSE;
	st_new_fn = find_library_function(&lha_agents_lib, LHA_STONITH_LIBRARY, "stonith_new", FALSE);
	st_del_fn = find_library_function(&lha_agents_lib, LHA_STONITH_LIBRARY, "stonith_delete", FALSE);
	st_info_fn = find_library_function(&lha_agents_lib, LHA_STONITH_LIBRARY, "stonith_get_info", FALSE);
	}

	if (lha_agents_lib && st_new_fn && st_del_fn && st_info_fn) {
	stonith_obj = (*st_new_fn) (agent);
	if(stonith_obj) {
	meta_longdesc = strdup((*st_info_fn)(stonith_obj, ST_DEVICEDESCR));
	if (meta_longdesc == NULL) {
	crm_warn("no long description in %s's metadata.", agent);
	meta_longdesc = strdup(no_parameter_info);
	}

	meta_shortdesc = strdup((*st_info_fn)(stonith_obj, ST_DEVICEID));
	if (meta_shortdesc == NULL) {
	crm_warn("no short description in %s's metadata.", agent);
	meta_shortdesc = strdup(no_parameter_info);
	}

	meta_param = strdup((*st_info_fn)(stonith_obj, ST_CONF_XML));
	if (meta_param == NULL) {
	crm_warn("no list of parameters in %s's metadata.", agent);
	meta_param = strdup(no_parameter_info);
	}
	(*st_del_fn)(stonith_obj);
	} else {
	return -EINVAL; /* Heartbeat agents not supported */
	}
	}

	xml_meta_longdesc =
	(char )xmlEncodeEntitiesReentrant(NULL, (const unsigned char )meta_longdesc);
	xml_meta_shortdesc =
	(char )xmlEncodeEntitiesReentrant(NULL, (const unsigned char )meta_shortdesc);

	bufferlen = strlen(META_TEMPLATE) + strlen(agent)
	+ strlen(xml_meta_longdesc) + strlen(xml_meta_shortdesc)
	+ strlen(meta_param) + 1;

	buffer = calloc(1, bufferlen);
	snprintf(buffer, bufferlen - 1, META_TEMPLATE,
	agent, xml_meta_longdesc, xml_meta_shortdesc, meta_param);

	xmlFree(xml_meta_longdesc);
	xmlFree(xml_meta_shortdesc);

	free(meta_shortdesc);
	free(meta_longdesc);
	free(meta_param);
	#endif
	}

	if (output) {
	*output = buffer;

	} else {
	free(buffer);
	}

	return rc;
	}

	static int
	stonith_api_query(stonith_t * stonith, int call_options, const char *target,
	stonith_key_value_t ** devices, int timeout)
	{
	int rc = 0, lpc = 0, max = 0;

	xmlNode *data = NULL;
	xmlNode *output = NULL;
	xmlXPathObjectPtr xpathObj = NULL;

	CRM_CHECK(devices != NULL, return -EINVAL);

	data = create_xml_node(NULL, F_STONITH_DEVICE);
	crm_xml_add(data, "origin", __FUNCTION__);
	crm_xml_add(data, F_STONITH_TARGET, target);
	rc = stonith_send_command(stonith, STONITH_OP_QUERY, data, &output, call_options, timeout);

	if (rc < 0) {
	return rc;
	}

	xpathObj = xpath_search(output, "//@agent");
	if (xpathObj) {
	max = xpathObj->nodesetval->nodeNr;

	for (lpc = 0; lpc < max; lpc++) {
	xmlNode *match = getXpathResult(xpathObj, lpc);

	CRM_CHECK(match != NULL, continue);

	crm_info("%s[%d] = %s", "//@agent", lpc, xmlGetNodePath(match));
	devices = stonith_key_value_add(devices, NULL, crm_element_value(match, XML_ATTR_ID));
	}
	}

	free_xml(output);
	free_xml(data);
	return max;
	}

	static int
	stonith_api_call(stonith_t * stonith,
	int call_options,
	const char *id,
	const char *action,
	const char *victim,
	int timeout,
	xmlNode **output)
	{
	int rc = 0;
	xmlNode *data = NULL;

	data = create_xml_node(NULL, F_STONITH_DEVICE);
	crm_xml_add(data, "origin", __FUNCTION__);
	crm_xml_add(data, F_STONITH_DEVICE, id);
	crm_xml_add(data, F_STONITH_ACTION, action);
	crm_xml_add(data, F_STONITH_TARGET, victim);

	rc = stonith_send_command(stonith, STONITH_OP_EXEC, data, output, call_options, timeout);
	free_xml(data);

	return rc;
	}

	static int
	stonith_api_list(stonith_t * stonith, int call_options, const char id, char *list_info, int timeout)
	{
	int rc;
	xmlNode *output = NULL;

	rc = stonith_api_call(stonith, call_options, id, "list", NULL, timeout, &output);

	if (output && list_info) {
	const char *list_str;

	list_str = crm_element_value(output, "st_output");

	if (list_str) {
	*list_info = strdup(list_str);
	}
	}

	if (output) {
	free_xml(output);
	}

	return rc;
	}

	static int
	stonith_api_monitor(stonith_t * stonith, int call_options, const char *id, int timeout)
	{
	return stonith_api_call(stonith, call_options, id, "monitor", NULL, timeout, NULL);
	}

	static int
	stonith_api_status(stonith_t * stonith, int call_options, const char id, const char port, int timeout)
	{
	return stonith_api_call(stonith, call_options, id, "status", port, timeout, NULL);
	}

	static int
	stonith_api_fence(stonith_t * stonith, int call_options, const char node, const char action,
	int timeout)
	{
	int rc = 0;
	xmlNode *data = NULL;

	data = create_xml_node(NULL, __FUNCTION__);
	crm_xml_add(data, F_STONITH_TARGET, node);
	crm_xml_add(data, F_STONITH_ACTION, action);
	crm_xml_add_int(data, F_STONITH_TIMEOUT, timeout);

	rc = stonith_send_command(stonith, STONITH_OP_FENCE, data, NULL, call_options, timeout);
	free_xml(data);

	return rc;
	}

	static int
	stonith_api_confirm(stonith_t * stonith, int call_options, const char *target)
	{
	return stonith_api_fence(stonith, call_options \| st_opt_manual_ack, target, "off", 0);
	}

	static int
	stonith_api_history(stonith_t * stonith, int call_options, const char *node,
	stonith_history_t ** history, int timeout)
	{
	int rc = 0;
	xmlNode *data = NULL;
	xmlNode *output = NULL;
	stonith_history_t *last = NULL;

	*history = NULL;

	if (node) {
	data = create_xml_node(NULL, __FUNCTION__);
	crm_xml_add(data, F_STONITH_TARGET, node);
	}

	rc = stonith_send_command(stonith, STONITH_OP_FENCE_HISTORY, data, &output,
	call_options \| st_opt_sync_call, timeout);
	free_xml(data);

	if (rc == 0) {
	xmlNode *op = NULL;
	xmlNode *reply = get_xpath_object("//" F_STONITH_HISTORY_LIST, output, LOG_ERR);

	for (op = __xml_first_child(reply); op != NULL; op = __xml_next(op)) {
	stonith_history_t *kvp;

	kvp = calloc(1, sizeof(stonith_history_t));
	kvp->target = crm_element_value_copy(op, F_STONITH_TARGET);
	kvp->action = crm_element_value_copy(op, F_STONITH_ACTION);
	kvp->origin = crm_element_value_copy(op, F_STONITH_ORIGIN);
	kvp->delegate = crm_element_value_copy(op, F_STONITH_DELEGATE);
	crm_element_value_int(op, F_STONITH_DATE, &kvp->completed);
	crm_element_value_int(op, F_STONITH_STATE, &kvp->state);

	if (last) {
	last->next = kvp;
	} else {
	*history = kvp;
	}
	last = kvp;
	}
	}
	return rc;
	}

	gboolean
	is_redhat_agent(const char *agent)
	{
	int rc = 0;
	struct stat prop;
	char buffer[FILENAME_MAX + 1];

	snprintf(buffer, FILENAME_MAX, "%s/%s", RH_STONITH_DIR, agent);
	rc = stat(buffer, &prop);
	if (rc >= 0 && S_ISREG(prop.st_mode)) {
	return TRUE;
	}
	return FALSE;
	}

	const char *
	get_stonith_provider(const char agent, const char provider)
	{
	/* This function sucks */
	if (is_redhat_agent(agent)) {
	return "redhat";

	#if HAVE_STONITH_STONITH_H
	} else {
	Stonith *stonith_obj = NULL;

	static gboolean need_init = TRUE;
	static Stonith (st_new_fn) (const char *) = NULL;
	static void (st_del_fn) (Stonith ) = NULL;

	if(need_init) {
	need_init = FALSE;
	st_new_fn = find_library_function(&lha_agents_lib, LHA_STONITH_LIBRARY, "stonith_new", FALSE);
	st_del_fn = find_library_function(&lha_agents_lib, LHA_STONITH_LIBRARY, "stonith_delete", FALSE);
	}

	if (lha_agents_lib && st_new_fn && st_del_fn) {
	stonith_obj = (*st_new_fn) (agent);
	if(stonith_obj) {
	(*st_del_fn)(stonith_obj);
	return "heartbeat";
	}
	}
	#endif
	}

	crm_err("No such device: %s", agent);
	return NULL;
	}

	static gint
	stonithlib_GCompareFunc(gconstpointer a, gconstpointer b)
	{
	int rc = 0;
	const stonith_notify_client_t *a_client = a;
	const stonith_notify_client_t *b_client = b;

	CRM_CHECK(a_client->event != NULL && b_client->event != NULL, return 0);
	rc = strcmp(a_client->event, b_client->event);
	if (rc == 0) {
	if (a_client->notify == NULL \|\| b_client->notify == NULL) {
	return 0;

	} else if (a_client->notify == b_client->notify) {
	return 0;

	} else if (((long)a_client->notify) < ((long)b_client->notify)) {
	crm_err("callbacks for %s are not equal: %p vs. %p",
	a_client->event, a_client->notify, b_client->notify);
	return -1;
	}
	crm_err("callbacks for %s are not equal: %p vs. %p",
	a_client->event, a_client->notify, b_client->notify);
	return 1;
	}
	return rc;
	}

	xmlNode *
	stonith_create_op(int call_id, const char token, const char op, xmlNode * data, int call_options)
	{
	xmlNode *op_msg = create_xml_node(NULL, "stonith_command");

	CRM_CHECK(op_msg != NULL, return NULL);
	CRM_CHECK(token != NULL, return NULL);

	crm_xml_add(op_msg, F_XML_TAGNAME, "stonith_command");

	crm_xml_add(op_msg, F_TYPE, T_STONITH_NG);
	crm_xml_add(op_msg, F_STONITH_CALLBACK_TOKEN, token);
	crm_xml_add(op_msg, F_STONITH_OPERATION, op);
	crm_xml_add_int(op_msg, F_STONITH_CALLID, call_id);
	crm_trace("Sending call options: %.8lx, %d", (long)call_options, call_options);
	crm_xml_add_int(op_msg, F_STONITH_CALLOPTS, call_options);

	if (data != NULL) {
	add_message_xml(op_msg, F_STONITH_CALLDATA, data);
	}

	return op_msg;
	}

	static void
	stonith_destroy_op_callback(gpointer data)
	{
	stonith_callback_client_t *blob = data;

	if (blob->timer && blob->timer->ref > 0) {
	g_source_remove(blob->timer->ref);
	}
	free(blob->timer);
	free(blob);
	}

	static int
	stonith_api_signoff(stonith_t * stonith)
	{
	stonith_private_t *native = stonith->private;

	crm_debug("Signing out of the STONITH Service");

	if (native->ipc != NULL) {
	/* If attached to mainloop and it is active, _close() will result in:
	* - the source being removed from mainloop
	* - the dnotify callback being invoked
	* Otherwise, we are at least correctly disconnecting IPC
	*/
	crm_ipc_close(native->ipc);
	crm_ipc_destroy(native->ipc);
	native->source = NULL;
	native->ipc = NULL;
	}

	stonith->state = stonith_disconnected;
	return pcmk_ok;
	}

	static int
	stonith_api_signon(stonith_t * stonith, const char name, int stonith_fd)
	{
	int rc = pcmk_ok;
	stonith_private_t *native = stonith->private;
	static struct ipc_client_callbacks st_callbacks =
	{
	.dispatch = stonith_dispatch_internal,
	.destroy = stonith_connection_destroy
	};

	crm_trace("Connecting command channel");

	stonith->state = stonith_connected_command;
	if(stonith_fd) {
	/* No mainloop */
	native->ipc = crm_ipc_new("stonith-ng", 0);

	if(native->ipc && crm_ipc_connect(native->ipc)) {
	*stonith_fd = crm_ipc_get_fd(native->ipc);

	} else if(native->ipc) {
	rc = -ENOTCONN;
	}

	} else {
	/* With mainloop */
	native->source = mainloop_add_ipc_client("stonith-ng", 0, stonith, &st_callbacks);
	native->ipc = mainloop_get_ipc_client(native->source);
	}

	if (native->ipc == NULL) {
	crm_debug("Could not connect to the Stonith API");
	rc = -ENOTCONN;
	}

	if (rc == pcmk_ok) {
	xmlNode *reply = NULL;
	xmlNode *hello = create_xml_node(NULL, "stonith_command");

	crm_xml_add(hello, F_TYPE, T_STONITH_NG);
	crm_xml_add(hello, F_STONITH_OPERATION, CRM_OP_REGISTER);
	crm_xml_add(hello, F_STONITH_CLIENTNAME, name);
	rc = crm_ipc_send(native->ipc, hello, &reply, -1);

	if(rc < 0) {
	crm_perror(LOG_DEBUG, "Couldn't complete registration with the fencing API: %d", rc);
	rc = -ECOMM;

	} else if(reply == NULL) {
	crm_err("Did not receive registration reply");
	rc = -EPROTO;

	} else {
	const char *msg_type = crm_element_value(reply, F_STONITH_OPERATION);
	const char *tmp_ticket = crm_element_value(reply, F_STONITH_CLIENTID);

	if (safe_str_neq(msg_type, CRM_OP_REGISTER)) {
	crm_err("Invalid registration message: %s", msg_type);
	crm_log_xml_err(reply, "Bad reply");
	rc = -EPROTO;

	} else if (tmp_ticket == NULL) {
	crm_err("No registration token provided");
	crm_log_xml_err(reply, "Bad reply");
	rc = -EPROTO;

	} else {
	crm_trace("Obtained registration token: %s", tmp_ticket);
	native->token = strdup(tmp_ticket);
	rc = pcmk_ok;
	}
	}

	free_xml(reply);
	free_xml(hello);
	}

	if (rc == pcmk_ok) {
	#if HAVE_MSGFROMIPC_TIMEOUT
	stonith->call_timeout = MAX_IPC_DELAY;
	#endif
	crm_debug("Connection to STONITH successful");
	return pcmk_ok;
	}

	crm_debug("Connection to STONITH failed: %s", pcmk_strerror(rc));
	stonith->cmds->disconnect(stonith);
	return rc;
	}

	static int
	stonith_set_notification(stonith_t * stonith, const char *callback, int enabled)
	{
	xmlNode *notify_msg = create_xml_node(NULL, __FUNCTION__);
	stonith_private_t *native = stonith->private;

	if (stonith->state != stonith_disconnected) {
	int rc;

	crm_xml_add(notify_msg, F_STONITH_OPERATION, T_STONITH_NOTIFY);
	if (enabled) {
	crm_xml_add(notify_msg, F_STONITH_NOTIFY_ACTIVATE, callback);
	} else {
	crm_xml_add(notify_msg, F_STONITH_NOTIFY_DEACTIVATE, callback);
	}
	rc = crm_ipc_send(native->ipc, notify_msg, NULL, -1);
	if(rc < 0) {
	crm_perror(LOG_DEBUG, "Couldn't register for fencing notifications: %d", rc);
	rc = -ECOMM;
	}
	}

	free_xml(notify_msg);
	return pcmk_ok;
	}

	static int
	stonith_api_add_notification(stonith_t * stonith, const char *event,
	void (callback) (stonith_t stonith, stonith_event_t *e))
	{
	GList *list_item = NULL;
	stonith_notify_client_t *new_client = NULL;
	stonith_private_t *private = NULL;

	private = stonith->private;
	crm_trace("Adding callback for %s events (%d)", event, g_list_length(private->notify_list));

	new_client = calloc(1, sizeof(stonith_notify_client_t));
	new_client->event = event;
	new_client->notify = callback;

	list_item = g_list_find_custom(private->notify_list, new_client, stonithlib_GCompareFunc);

	if (list_item != NULL) {
	crm_warn("Callback already present");
	free(new_client);
	return -ENOTUNIQ;

	} else {
	private->notify_list = g_list_append(private->notify_list, new_client);

	stonith_set_notification(stonith, event, 1);

	crm_trace("Callback added (%d)", g_list_length(private->notify_list));
	}
	return pcmk_ok;
	}

	static int
	stonith_api_del_notification(stonith_t * stonith, const char *event)
	{
	GList *list_item = NULL;
	stonith_notify_client_t *new_client = NULL;
	stonith_private_t *private = NULL;

	crm_debug("Removing callback for %s events", event);

	private = stonith->private;
	new_client = calloc(1, sizeof(stonith_notify_client_t));
	new_client->event = event;
	new_client->notify = NULL;

	list_item = g_list_find_custom(private->notify_list, new_client, stonithlib_GCompareFunc);

	stonith_set_notification(stonith, event, 0);

	if (list_item != NULL) {
	stonith_notify_client_t *list_client = list_item->data;

	private->notify_list = g_list_remove(private->notify_list, list_client);
	free(list_client);

	crm_trace("Removed callback");

	} else {
	crm_trace("Callback not present");
	}
	free(new_client);
	return pcmk_ok;
	}

	static gboolean
	stonith_async_timeout_handler(gpointer data)
	{
	struct timer_rec_s *timer = data;

	crm_err("Async call %d timed out after %dms", timer->call_id, timer->timeout);
	stonith_perform_callback(timer->stonith, NULL, timer->call_id, -ETIME);

	/* Always return TRUE, never remove the handler
	* We do that in stonith_del_callback()
	*/
	return TRUE;
	}

	static int
	stonith_api_add_callback(stonith_t * stonith, int call_id, int timeout, bool only_success,
	void user_data, const char callback_name,
	void (callback) (stonith_t st, const xmlNode * msg, int call, int rc,
	xmlNode * output, void *userdata))
	{
	stonith_callback_client_t *blob = NULL;
	stonith_private_t *private = NULL;

	CRM_CHECK(stonith != NULL, return -EINVAL);
	CRM_CHECK(stonith->private != NULL, return -EINVAL);
	private = stonith->private;

	if (call_id == 0) {
	private->op_callback = callback;

	} else if (call_id < 0) {
	if (only_success == FALSE) {
	crm_trace("Call failed, calling %s: %s",
	callback_name, pcmk_strerror(call_id));
	callback(stonith, NULL, call_id, call_id, NULL, user_data);
	} else {
	crm_warn("STONITH call failed: %s", pcmk_strerror(call_id));
	}
	return FALSE;
	}

	blob = calloc(1, sizeof(stonith_callback_client_t));
	blob->id = callback_name;
	blob->only_success = only_success;
	blob->user_data = user_data;
	blob->callback = callback;

	if (timeout > 0) {
	struct timer_rec_s *async_timer = NULL;

	async_timer = calloc(1, sizeof(struct timer_rec_s));
	blob->timer = async_timer;

	async_timer->stonith = stonith;
	async_timer->call_id = call_id;
	/* Allow a fair bit of grace to allow the server to tell us of a timeout
	* This is only a fallback
	*/
	async_timer->timeout = (timeout + 60) * 1000;
	async_timer->ref =
	g_timeout_add(async_timer->timeout, stonith_async_timeout_handler, async_timer);
	}

	g_hash_table_insert(private->stonith_op_callback_table, GINT_TO_POINTER(call_id), blob);
	crm_trace("Added callback to %s for call %d", callback_name, call_id);

	return TRUE;
	}

	static int
	stonith_api_del_callback(stonith_t * stonith, int call_id, bool all_callbacks)
	{
	stonith_private_t *private = stonith->private;

	if (all_callbacks) {
	private->op_callback = NULL;
	g_hash_table_destroy(private->stonith_op_callback_table);
	private->stonith_op_callback_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
	NULL,
	stonith_destroy_op_callback);

	} else if (call_id == 0) {
	private->op_callback = NULL;

	} else {
	g_hash_table_remove(private->stonith_op_callback_table, GINT_TO_POINTER(call_id));
	}
	return pcmk_ok;
	}

	static void
	stonith_dump_pending_op(gpointer key, gpointer value, gpointer user_data)
	{
	int call = GPOINTER_TO_INT(key);
	stonith_callback_client_t *blob = value;

	crm_debug("Call %d (%s): pending", call, crm_str(blob->id));
	}

	void
	stonith_dump_pending_callbacks(stonith_t * stonith)
	{
	stonith_private_t *private = stonith->private;

	if (private->stonith_op_callback_table == NULL) {
	return;
	}
	return g_hash_table_foreach(private->stonith_op_callback_table, stonith_dump_pending_op, NULL);
	}

	void
	stonith_perform_callback(stonith_t * stonith, xmlNode * msg, int call_id, int rc)
	{
	xmlNode *output = NULL;
	stonith_private_t *private = NULL;
	stonith_callback_client_t *blob = NULL;
	stonith_callback_client_t local_blob;

	CRM_CHECK(stonith != NULL, return);
	CRM_CHECK(stonith->private != NULL, return);

	private = stonith->private;

	local_blob.id = NULL;
	local_blob.callback = NULL;
	local_blob.user_data = NULL;
	local_blob.only_success = FALSE;

	if (msg != NULL) {
	crm_element_value_int(msg, F_STONITH_RC, &rc);
	crm_element_value_int(msg, F_STONITH_CALLID, &call_id);
	output = get_message_xml(msg, F_STONITH_CALLDATA);
	}

	CRM_CHECK(call_id > 0, crm_log_xml_err(msg, "Bad result"));

	blob = g_hash_table_lookup(private->stonith_op_callback_table, GINT_TO_POINTER(call_id));

	if (blob != NULL) {
	local_blob = *blob;
	blob = NULL;

	stonith_api_del_callback(stonith, call_id, FALSE);

	} else {
	crm_trace("No callback found for call %d", call_id);
	local_blob.callback = NULL;
	}

	if (local_blob.callback != NULL && (rc == pcmk_ok \|\| local_blob.only_success == FALSE)) {
	crm_trace("Invoking callback %s for call %d", crm_str(local_blob.id), call_id);
	local_blob.callback(stonith, msg, call_id, rc, output, local_blob.user_data);

	} else if (private->op_callback == NULL && rc != pcmk_ok) {
	crm_warn("STONITH command failed: %s", pcmk_strerror(rc));
	crm_log_xml_debug(msg, "Failed STONITH Update");
	}

	if (private->op_callback != NULL) {
	crm_trace("Invoking global callback for call %d", call_id);
	private->op_callback(stonith, msg, call_id, rc, output, NULL);
	}
	crm_trace("OP callback activated.");
	}

	/*
	<notify t="st_notify" subt="st_device_register" st_op="st_device_register" st_rc="0" >
	<st_calldata >
	<stonith_command t="stonith-ng" st_async_id="088fb640-431a-48b9-b2fc-c4ff78d0a2d9" st_op="st_device_register" st_callid="2" st_callopt="4096" st_timeout="0" st_clientid="088fb640-431a-48b9-b2fc-c4ff78d0a2d9" st_clientname="stonith-test" >
	<st_calldata >
	<st_device_id id="test-id" origin="create_device_registration_xml" agent="fence_virsh" namespace="stonith-ng" >
	<attributes ipaddr="localhost" pcmk-portmal="some-host=pcmk-1 pcmk-3=3,4" login="root" identity_file="/root/.ssh/id_dsa" />
	</st_device_id>
	</st_calldata>
	</stonith_command>
	</st_calldata>
	</notify>

	<notify t="st_notify" subt="st_notify_fence" st_op="st_notify_fence" st_rc="0" >
	<st_calldata >
	<st_notify_fence st_rc="0" st_target="some-host" st_op="st_fence" st_delegate="test-id" st_origin="61dd7759-e229-4be7-b1f8-ef49dd14d9f0" />
	</st_calldata>
	</notify>
	*/
	static stonith_event_t *
	xml_to_event(xmlNode *msg)
	{
	stonith_event_t *event = calloc(1, sizeof(stonith_event_t));
	const char *ntype = crm_element_value(msg, F_SUBTYPE);
	char *data_addr = g_strdup_printf("//%s", ntype);
	xmlNode *data = get_xpath_object(data_addr, msg, LOG_ERR);

	crm_log_xml_trace(msg, "stonith_notify");

	crm_element_value_int(msg, F_STONITH_RC, &(event->result));

	if(safe_str_eq(ntype, T_STONITH_NOTIFY_FENCE)) {
	event->origin = crm_element_value_copy(data, F_STONITH_ORIGIN);
	event->target = crm_element_value_copy(data, F_STONITH_TARGET);
	event->operation = crm_element_value_copy(msg, F_STONITH_OPERATION);
	event->executioner = crm_element_value_copy(data, F_STONITH_DELEGATE);
	event->id = crm_element_value_copy(data, F_STONITH_REMOTE);
	}

	g_free(data_addr);
	return event;
	}

	static void
	stonith_send_notification(gpointer data, gpointer user_data)
	{
	struct notify_blob_s *blob = user_data;
	stonith_notify_client_t *entry = data;
	stonith_event_t *st_event = NULL;
	const char *event = NULL;

	if (blob->xml == NULL) {
	crm_warn("Skipping callback - NULL message");
	return;
	}

	event = crm_element_value(blob->xml, F_SUBTYPE);

	if (entry == NULL) {
	crm_warn("Skipping callback - NULL callback client");
	return;

	} else if (entry->notify == NULL) {
	crm_warn("Skipping callback - NULL callback");
	return;

	} else if (safe_str_neq(entry->event, event)) {
	crm_trace("Skipping callback - event mismatch %p/%s vs. %s", entry, entry->event, event);
	return;
	}

	st_event = xml_to_event(blob->xml);

	crm_trace("Invoking callback for %p/%s event...", entry, event);
	entry->notify(blob->stonith, st_event);
	crm_trace("Callback invoked...");
	}

	int
	stonith_send_command(stonith_t * stonith, const char op, xmlNode data, xmlNode ** output_data,
	int call_options, int timeout)
	{
	int rc = 0;
	int reply_id = -1;

	xmlNode *op_msg = NULL;
	xmlNode *op_reply = NULL;

	stonith_private_t *native = stonith->private;

	if (stonith->state == stonith_disconnected) {
	return -ENOTCONN;
	}

	if (output_data != NULL) {
	*output_data = NULL;
	}

	if (op == NULL) {
	crm_err("No operation specified");
	return -EINVAL;
	}

	stonith->call_id++;
	/* prevent call_id from being negative (or zero) and conflicting
	* with the stonith_errors enum
	* use 2 because we use it as (stonith->call_id - 1) below
	*/
	if (stonith->call_id < 1) {
	stonith->call_id = 1;
	}

	CRM_CHECK(native->token != NULL,;);
	op_msg = stonith_create_op(stonith->call_id, native->token, op, data, call_options);
	if (op_msg == NULL) {
	return -EINVAL;
	}

	crm_xml_add_int(op_msg, F_STONITH_TIMEOUT, timeout);
	crm_trace("Sending %s message to STONITH service, Timeout: %ds", op, timeout);

	rc = crm_ipc_send(native->ipc, op_msg, &op_reply, 1000*(timeout + 60));
	free_xml(op_msg);

	if(rc < 0) {
	crm_perror(LOG_ERR, "Couldn't perform %s operation (timeout=%ds): %d", op, timeout, rc);
	rc = -ECOMM;
	goto done;
	}

	crm_log_xml_trace(op_reply, "Reply");

	if (!(call_options & st_opt_sync_call)) {
	crm_trace("Async call %d, returning", stonith->call_id);
	CRM_CHECK(stonith->call_id != 0, return -EPROTO);
	free_xml(op_reply);

	return stonith->call_id;
	}

	rc = pcmk_ok;
	crm_element_value_int(op_reply, F_STONITH_CALLID, &reply_id);

	if (reply_id == stonith->call_id) {
	crm_trace("Syncronous reply %d received", reply_id);

	if (crm_element_value_int(op_reply, F_STONITH_RC, &rc) != 0) {
	rc = -ENOMSG;
	}

	if ((call_options & st_opt_discard_reply) \|\| output_data == NULL) {
	crm_trace("Discarding reply");

	} else {
	*output_data = op_reply;
	op_reply = NULL; /* Prevent subsequent free */
	}

	} else if (reply_id <= 0) {
	crm_err("Recieved bad reply: No id set");
	crm_log_xml_err(op_reply, "Bad reply");
	free_xml(op_reply);
	rc = -ENOMSG;

	} else {
	crm_err("Recieved bad reply: %d (wanted %d)", reply_id, stonith->call_id);
	crm_log_xml_err(op_reply, "Old reply");
	free_xml(op_reply);
	rc = -ENOMSG;
	}

	done:
	if (crm_ipc_connected(native->ipc) == FALSE) {
	crm_err("STONITH disconnected");
	stonith->state = stonith_disconnected;
	}

	free_xml(op_reply);
	return rc;
	}

	/* Not used with mainloop */
	bool
	stonith_dispatch(stonith_t * st)
	{
	gboolean stay_connected = TRUE;
	stonith_private_t *private = NULL;

	CRM_ASSERT(st != NULL);
	private = st->private;

	while(crm_ipc_ready(private->ipc)) {

	if(crm_ipc_read(private->ipc) > 0) {
	const char *msg = crm_ipc_buffer(private->ipc);
	stonith_dispatch_internal(msg, strlen(msg), st);
	}

	if(crm_ipc_connected(private->ipc) == FALSE) {
	crm_err("Connection closed");
	stay_connected = FALSE;
	}
	}

	return stay_connected;
	}

	int
	stonith_dispatch_internal(const char *buffer, ssize_t length, gpointer userdata)
	{
	const char *type = NULL;
	struct notify_blob_s blob;

	stonith_t * st = userdata;
	stonith_private_t *private = NULL;

	CRM_ASSERT(st != NULL);
	private = st->private;

	blob.stonith = st;
	blob.xml = string2xml(buffer);
	if (blob.xml == NULL) {
	crm_warn("Received a NULL msg from STONITH service: %s.", buffer);
	return 0;
	}

	/* do callbacks */
	type = crm_element_value(blob.xml, F_TYPE);
	crm_trace("Activating %s callbacks...", type);

	if (safe_str_eq(type, T_STONITH_NG)) {
	stonith_perform_callback(st, blob.xml, 0, 0);

	} else if (safe_str_eq(type, T_STONITH_NOTIFY)) {
	g_list_foreach(private->notify_list, stonith_send_notification, &blob);

	} else {
	crm_err("Unknown message type: %s", type);
	crm_log_xml_warn(blob.xml, "BadReply");
	}

	free_xml(blob.xml);
	return 1;
	}

	static int
	stonith_api_free(stonith_t * stonith)
	{
	int rc = pcmk_ok;

	if (stonith->state != stonith_disconnected) {
	rc = stonith->cmds->disconnect(stonith);
	}

	if (stonith->state == stonith_disconnected) {
	stonith_private_t *private = stonith->private;

	g_hash_table_destroy(private->stonith_op_callback_table);
	free(private->token);
	free(stonith->private);
	free(stonith->cmds);
	free(stonith);
	}

	return rc;
	}

	void
	stonith_api_delete(stonith_t * stonith)
	{
	stonith_private_t *private = stonith->private;
	GList *list = private->notify_list;

	while (list != NULL) {
	stonith_notify_client_t *client = g_list_nth_data(list, 0);

	list = g_list_remove(list, client);
	free(client);
	}

	stonith->cmds->free(stonith);
	stonith = NULL;
	}

	stonith_t *
	stonith_api_new(void)
	{
	stonith_t *new_stonith = NULL;
	stonith_private_t *private = NULL;

	new_stonith = calloc(1, sizeof(stonith_t));
	private = calloc(1, sizeof(stonith_private_t));
	new_stonith->private = private;

	private->stonith_op_callback_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
	NULL, stonith_destroy_op_callback);
	private->notify_list = NULL;

	new_stonith->call_id = 1;
	new_stonith->state = stonith_disconnected;

	new_stonith->cmds = calloc(1, sizeof(stonith_api_operations_t));

	/* INDENT-OFF */
	new_stonith->cmds->free = stonith_api_free;
	new_stonith->cmds->connect = stonith_api_signon;
	new_stonith->cmds->disconnect = stonith_api_signoff;

	new_stonith->cmds->list = stonith_api_list;
	new_stonith->cmds->monitor = stonith_api_monitor;
	new_stonith->cmds->status = stonith_api_status;
	new_stonith->cmds->fence = stonith_api_fence;
	new_stonith->cmds->confirm = stonith_api_confirm;
	new_stonith->cmds->history = stonith_api_history;

	new_stonith->cmds->list_agents = stonith_api_device_list;
	new_stonith->cmds->metadata = stonith_api_device_metadata;

	new_stonith->cmds->query = stonith_api_query;
	new_stonith->cmds->remove_device = stonith_api_remove_device;
	new_stonith->cmds->register_device = stonith_api_register_device;

	new_stonith->cmds->remove_level = stonith_api_remove_level;
	new_stonith->cmds->register_level = stonith_api_register_level;

	new_stonith->cmds->remove_callback = stonith_api_del_callback;
	new_stonith->cmds->register_callback = stonith_api_add_callback;
	new_stonith->cmds->remove_notification = stonith_api_del_notification;
	new_stonith->cmds->register_notification = stonith_api_add_notification;
	/* INDENT-ON */

	return new_stonith;
	}

	stonith_key_value_t *
	stonith_key_value_add(stonith_key_value_t * head, const char key, const char value)
	{
	stonith_key_value_t p, end;

	p = calloc(1, sizeof(stonith_key_value_t));
	if (key) {
	p->key = strdup(key);
	}
	if (value) {
	p->value = strdup(value);
	}

	end = head;
	while (end && end->next) {
	end = end->next;
	}

	if (end) {
	end->next = p;
	} else {
	head = p;
	}

	return head;
	}

	void
	stonith_key_value_freeall(stonith_key_value_t * head, int keys, int values)
	{
	stonith_key_value_t *p;

	while (head) {
	p = head->next;
	if (keys) {
	free(head->key);
	}
	if (values) {
	free(head->value);
	}
	free(head);
	head = p;
	}
	}

	int
	stonith_api_kick(int nodeid, const char *uname, int timeout, bool off)
	{
	char *name = NULL;
	const char *action = "reboot";

	int rc = -EPROTO;
	stonith_t *st = NULL;
	enum stonith_call_options opts = st_opt_sync_call \| st_opt_allow_suicide;

	st = stonith_api_new();
	if (st) {
	rc = st->cmds->connect(st, "stonith-api", NULL);
	}

	if (uname != NULL) {
	name = strdup(uname);

	} else if (nodeid > 0) {
	opts \|= st_opt_cs_nodeid;
	name = crm_itoa(nodeid);
	}

	if (off) {
	action = "off";
	}

	if (rc == pcmk_ok) {
	rc = st->cmds->fence(st, opts, name, action, timeout);
	}

	if (st) {
	st->cmds->disconnect(st);
	stonith_api_delete(st);
	}

	free(name);
	return rc;
	}

	time_t
	stonith_api_time(int nodeid, const char *uname, bool in_progress)
	{
	int rc = 0;
	char *name = NULL;

	time_t when = 0;
	time_t progress = 0;
	stonith_t *st = NULL;
	stonith_history_t history, hp = NULL;
	enum stonith_call_options opts = st_opt_sync_call;

	st = stonith_api_new();
	if (st) {
	rc = st->cmds->connect(st, "stonith-api", NULL);
	}

	if (uname != NULL) {
	name = strdup(uname);

	} else if (nodeid > 0) {
	opts \|= st_opt_cs_nodeid;
	name = crm_itoa(nodeid);
	}

	if (st && rc == pcmk_ok) {
	st->cmds->history(st, st_opt_sync_call \| st_opt_cs_nodeid, name, &history, 120);

	for (hp = history; hp; hp = hp->next) {
	if (in_progress) {
	if (hp->state != st_done && hp->state != st_failed) {
	progress = time(NULL);
	}

	} else if (hp->state == st_done) {
	when = hp->completed;
	}
	}
	}

	if (progress) {
	when = progress;
	}

	if (st) {
	st->cmds->disconnect(st);
	stonith_api_delete(st);
	}

	free(name);
	return when;
	}

File Metadata

Mime Type: text/x-diff
Expires: Sat, Nov 23, 7:24 AM (21 h, 48 m)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 1018402
Default Alt Text: (61 KB)

No OneTemporaryActions

View Options

File Metadata

Event Timeline

No OneTemporary
Actions