callbacks.c
No OneTemporary
Actions

Size

43 KB

Referenced Files

None

Subscribers

None

callbacks.c
View Options

	/*
	* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This software 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
	* General Public License for more details.
	*
	* You should have received a copy of the GNU 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 <sys/param.h>
	#include <stdio.h>
	#include <sys/types.h>
	#include <unistd.h>
	#include <grp.h>

	#include <stdlib.h>
	#include <errno.h>
	#include <fcntl.h>

	#include <crm/crm.h>
	#include <crm/cib.h>
	#include <crm/msg_xml.h>
	#include <crm/common/ipc.h>
	#include <crm/cluster/internal.h>

	#include <crm/common/xml.h>


	#include <cibio.h>
	#include <callbacks.h>
	#include <cibmessages.h>
	#include <notify.h>
	#include "common.h"

	extern GMainLoop *mainloop;
	extern gboolean cib_shutdown_flag;
	extern gboolean stand_alone;
	extern const char *cib_root;

	static unsigned long cib_local_bcast_num = 0;

	typedef struct cib_local_notify_s {
	xmlNode *notify_src;
	char *client_id;
	gboolean from_peer;
	gboolean sync_reply;
	} cib_local_notify_t;

	qb_ipcs_service_t *ipcs_ro = NULL;
	qb_ipcs_service_t *ipcs_rw = NULL;
	qb_ipcs_service_t *ipcs_shm = NULL;

	extern crm_cluster_t crm_cluster;

	extern int cib_update_counter(xmlNode * xml_obj, const char *field, gboolean reset);

	extern void GHFunc_count_peers(gpointer key, gpointer value, gpointer user_data);

	gint cib_GCompareFunc(gconstpointer a, gconstpointer b);
	gboolean can_write(int flags);
	void send_cib_replace(const xmlNode * sync_request, const char *host);
	void cib_process_request(xmlNode * request, gboolean privileged, gboolean force_synchronous,
	gboolean from_peer, cib_client_t * cib_client);

	extern GHashTable *client_list;
	extern GHashTable *local_notify_queue;

	int next_client_id = 0;
	extern const char *cib_our_uname;
	extern unsigned long cib_num_ops, cib_num_local, cib_num_updates, cib_num_fail;
	extern unsigned long cib_bad_connects, cib_num_timeouts;
	extern int cib_status;

	int cib_process_command(xmlNode * request, xmlNode ** reply,
	xmlNode ** cib_diff, gboolean privileged);

	gboolean cib_common_callback(qb_ipcs_connection_t c, void data, size_t size, gboolean privileged);

	static int32_t
	cib_ipc_accept(qb_ipcs_connection_t *c, uid_t uid, gid_t gid)
	{
	cib_client_t *new_client = NULL;
	#if ENABLE_ACL
	struct group *crm_grp = NULL;
	#endif

	crm_trace("Connecting %p for uid=%d gid=%d pid=%d", c, uid, gid, crm_ipcs_client_pid(c));
	if (cib_shutdown_flag) {
	crm_info("Ignoring new client [%d] during shutdown", crm_ipcs_client_pid(c));
	return -EPERM;
	}

	new_client = calloc(1, sizeof(cib_client_t));
	new_client->ipc = c;

	CRM_CHECK(new_client->id == NULL, free(new_client->id));
	new_client->id = crm_generate_uuid();

	#if ENABLE_ACL
	crm_grp = getgrnam(CRM_DAEMON_GROUP);
	if (crm_grp) {
	qb_ipcs_connection_auth_set(c, -1, crm_grp->gr_gid, S_IRUSR \| S_IWUSR \| S_IRGRP \| S_IWGRP);
	}

	new_client->user = uid2username(uid);
	#endif

	/* make sure we can find ourselves later for sync calls
	* redirected to the master instance
	*/
	g_hash_table_insert(client_list, new_client->id, new_client);

	qb_ipcs_context_set(c, new_client);

	return 0;
	}

	static void
	cib_ipc_created(qb_ipcs_connection_t *c)
	{
	cib_client_t *cib_client = qb_ipcs_context_get(c);

	crm_trace("%p connected for client %s", c, cib_client->id);
	}

	static int32_t
	cib_ipc_dispatch_rw(qb_ipcs_connection_t c, void data, size_t size)
	{
	cib_client_t *cib_client = qb_ipcs_context_get(c);
	crm_trace("%p message from %s", c, cib_client->id);
	return cib_common_callback(c, data, size, TRUE);
	}

	static int32_t
	cib_ipc_dispatch_ro(qb_ipcs_connection_t c, void data, size_t size)
	{
	cib_client_t *cib_client = qb_ipcs_context_get(c);
	crm_trace("%p message from %s", c, cib_client->id);
	return cib_common_callback(c, data, size, FALSE);
	}

	/* Error code means? */
	static int32_t
	cib_ipc_closed(qb_ipcs_connection_t *c)
	{
	cib_client_t *cib_client = qb_ipcs_context_get(c);
	crm_trace("Connection %p closed", c);

	CRM_ASSERT(cib_client != NULL);
	CRM_ASSERT(cib_client->id != NULL);

	if (!g_hash_table_remove(client_list, cib_client->id)) {
	crm_err("Client %s not found in the hashtable", cib_client->name);
	}

	return 0;
	}

	static void
	cib_ipc_destroy(qb_ipcs_connection_t *c)
	{
	cib_client_t *cib_client = qb_ipcs_context_get(c);

	CRM_ASSERT(cib_client != NULL);
	CRM_ASSERT(cib_client->id != NULL);

	/* In case we arrive here without a call to cib_ipc_close() */
	g_hash_table_remove(client_list, cib_client->id);

	crm_trace("Destroying %s (%p)", cib_client->name, c);
	free(cib_client->name);
	free(cib_client->callback_id);
	free(cib_client->id);
	free(cib_client->user);
	free(cib_client);
	crm_trace("Freed the cib client");

	if (cib_shutdown_flag) {
	cib_shutdown(0);
	}
	}

	struct qb_ipcs_service_handlers ipc_ro_callbacks =
	{
	.connection_accept = cib_ipc_accept,
	.connection_created = cib_ipc_created,
	.msg_process = cib_ipc_dispatch_ro,
	.connection_closed = cib_ipc_closed,
	.connection_destroyed = cib_ipc_destroy
	};

	struct qb_ipcs_service_handlers ipc_rw_callbacks =
	{
	.connection_accept = cib_ipc_accept,
	.connection_created = cib_ipc_created,
	.msg_process = cib_ipc_dispatch_rw,
	.connection_closed = cib_ipc_closed,
	.connection_destroyed = cib_ipc_destroy
	};

	void
	cib_common_callback_worker(uint32_t id, uint32_t flags, xmlNode * op_request, cib_client_t * cib_client, gboolean privileged)
	{
	const char *op = crm_element_value(op_request, F_CIB_OPERATION);

	if (crm_str_eq(op, CRM_OP_REGISTER, TRUE)) {
	if(flags & crm_ipc_client_response) {
	xmlNode *ack = create_xml_node(NULL, __FUNCTION__);

	crm_xml_add(ack, F_CIB_OPERATION, CRM_OP_REGISTER);
	crm_xml_add(ack, F_CIB_CLIENTID, cib_client->id);
	crm_ipcs_send(cib_client->ipc, id, ack, FALSE);
	cib_client->request_id = 0;
	free_xml(ack);
	}
	return;

	} else if (crm_str_eq(op, T_CIB_NOTIFY, TRUE)) {
	/* Update the notify filters for this client */
	int on_off = 0;
	const char *type = crm_element_value(op_request, F_CIB_NOTIFY_TYPE);
	crm_element_value_int(op_request, F_CIB_NOTIFY_ACTIVATE, &on_off);

	crm_debug("Setting %s callbacks for %s (%s): %s",
	type, cib_client->name, cib_client->id, on_off ? "on" : "off");

	if (safe_str_eq(type, T_CIB_POST_NOTIFY)) {
	cib_client->post_notify = on_off;

	} else if (safe_str_eq(type, T_CIB_PRE_NOTIFY)) {
	cib_client->pre_notify = on_off;

	} else if (safe_str_eq(type, T_CIB_UPDATE_CONFIRM)) {
	cib_client->confirmations = on_off;

	} else if (safe_str_eq(type, T_CIB_DIFF_NOTIFY)) {
	cib_client->diffs = on_off;

	} else if (safe_str_eq(type, T_CIB_REPLACE_NOTIFY)) {
	cib_client->replace = on_off;
	}

	if(flags & crm_ipc_client_response) {
	/* TODO - include rc */
	crm_ipcs_send_ack(cib_client->ipc, id, "ack", __FUNCTION__, __LINE__);
	cib_client->request_id = 0;
	}
	return;
	}

	cib_client->num_calls++;
	cib_process_request(op_request, FALSE, privileged, FALSE, cib_client);
	}

	int32_t
	cib_common_callback(qb_ipcs_connection_t c, void data, size_t size, gboolean privileged)
	{
	uint32_t id = 0;
	uint32_t flags = 0;
	int call_options = 0;
	xmlNode *op_request = crm_ipcs_recv(c, data, size, &id, &flags);
	cib_client_t *cib_client = qb_ipcs_context_get(c);

	if(op_request) {
	crm_element_value_int(op_request, F_CIB_CALLOPTS, &call_options);
	}

	crm_trace("Inbound: %.200s", data);
	if (op_request == NULL \|\| cib_client == NULL) {
	crm_ipcs_send_ack(c, id, "nack", __FUNCTION__, __LINE__);
	return 0;
	}

	if(is_set(call_options, cib_sync_call)) {
	CRM_ASSERT(flags & crm_ipc_client_response);
	}

	if(flags & crm_ipc_client_response) {
	CRM_LOG_ASSERT(cib_client->request_id == 0); /* This means the client has two synchronous events in-flight */
	cib_client->request_id = id; /* Reply only to the last one */
	}


	if (cib_client->name == NULL) {
	const char *value = crm_element_value(op_request, F_CIB_CLIENTNAME);
	if (value == NULL) {
	cib_client->name = crm_itoa(crm_ipcs_client_pid(c));
	} else {
	cib_client->name = strdup(value);
	}
	}

	if (cib_client->callback_id == NULL) {
	const char *value = crm_element_value(op_request, F_CIB_CALLBACK_TOKEN);
	if (value != NULL) {
	cib_client->callback_id = strdup(value);

	} else {
	cib_client->callback_id = strdup(cib_client->id);
	}
	}

	crm_xml_add(op_request, F_CIB_CLIENTID, cib_client->id);
	crm_xml_add(op_request, F_CIB_CLIENTNAME, cib_client->name);

	#if ENABLE_ACL
	determine_request_user(cib_client->user, op_request, F_CIB_USER);
	#endif

	crm_log_xml_trace(op_request, "Client[inbound]");

	cib_common_callback_worker(id, flags, op_request, cib_client, privileged);
	free_xml(op_request);

	return 0;
	}

	static void
	do_local_notify(xmlNode * notify_src, const char *client_id,
	gboolean sync_reply, gboolean from_peer)
	{
	/* send callback to originating child */
	cib_client_t *client_obj = NULL;
	int local_rc = pcmk_ok;

	if (client_id != NULL) {
	client_obj = g_hash_table_lookup(client_list, client_id);
	} else {
	crm_trace("No client to sent the response to. F_CIB_CLIENTID not set.");
	}

	if (client_obj == NULL) {
	local_rc = -ECONNRESET;

	} else {
	int rid = 0;

	if(sync_reply) {
	CRM_LOG_ASSERT(client_obj->request_id);

	rid = client_obj->request_id;
	client_obj->request_id = 0;

	crm_trace("Sending response %d to %s %s",
	rid, client_obj->name, from_peer?"(originator of delegated request)":"");

	} else {
	crm_trace("Sending an event to %s %s",
	client_obj->name, from_peer?"(originator of delegated request)":"");
	}

	if (client_obj->ipc && crm_ipcs_send(client_obj->ipc, rid, notify_src, !sync_reply) < 0) {
	local_rc = -ENOMSG;

	#ifdef HAVE_GNUTLS_GNUTLS_H
	} else if (client_obj->session) {
	crm_send_remote_msg(client_obj->session, notify_src, client_obj->encrypted);
	#endif
	} else if(client_obj->ipc == NULL) {
	crm_err("Unknown transport for %s", client_obj->name);
	}
	}

	if (local_rc != pcmk_ok && client_obj != NULL) {
	crm_warn("%sSync reply to %s failed: %s",
	sync_reply ? "" : "A-",
	client_obj ? client_obj->name : "<unknown>", pcmk_strerror(local_rc));
	}
	}

	static void
	local_notify_destroy_callback(gpointer data)
	{
	cib_local_notify_t *notify = data;

	free_xml(notify->notify_src);
	free(notify->client_id);
	free(notify);
	}

	static void
	check_local_notify(int bcast_id)
	{
	cib_local_notify_t *notify = NULL;

	if (!local_notify_queue) {
	return;
	}

	notify = g_hash_table_lookup(local_notify_queue, GINT_TO_POINTER(bcast_id));

	if (notify) {
	do_local_notify(notify->notify_src, notify->client_id, notify->sync_reply, notify->from_peer);
	g_hash_table_remove(local_notify_queue, GINT_TO_POINTER(bcast_id));
	}
	}

	static void
	queue_local_notify(xmlNode * notify_src, const char *client_id, gboolean sync_reply, gboolean from_peer)
	{
	cib_local_notify_t *notify = calloc(1, sizeof(cib_local_notify_t));

	notify->notify_src = notify_src;
	notify->client_id = strdup(client_id);
	notify->sync_reply = sync_reply;
	notify->from_peer = from_peer;

	if (!local_notify_queue) {
	local_notify_queue = g_hash_table_new_full(g_direct_hash,
	g_direct_equal, NULL, local_notify_destroy_callback);
	}

	g_hash_table_insert(local_notify_queue, GINT_TO_POINTER(cib_local_bcast_num), notify);
	}

	static void
	parse_local_options(cib_client_t * cib_client, int call_type, int call_options, const char *host,
	const char op, gboolean local_notify, gboolean * needs_reply,
	gboolean * process, gboolean * needs_forward)
	{
	if (cib_op_modifies(call_type)
	&& !(call_options & cib_inhibit_bcast)) {
	/* we need to send an update anyway */
	*needs_reply = TRUE;
	} else {
	*needs_reply = FALSE;
	}

	if (host == NULL && (call_options & cib_scope_local)) {
	crm_trace("Processing locally scoped %s op from %s", op, cib_client->name);
	*local_notify = TRUE;

	} else if (host == NULL && cib_is_master) {
	crm_trace("Processing master %s op locally from %s", op, cib_client->name);
	*local_notify = TRUE;

	} else if (safe_str_eq(host, cib_our_uname)) {
	crm_trace("Processing locally addressed %s op from %s", op, cib_client->name);
	*local_notify = TRUE;

	} else if (stand_alone) {
	*needs_forward = FALSE;
	*local_notify = TRUE;
	*process = TRUE;

	} else {
	crm_trace("%s op from %s needs to be forwarded to %s",
	op, cib_client->name, host ? host : "the master instance");
	*needs_forward = TRUE;
	*process = FALSE;
	}
	}

	static gboolean
	parse_peer_options(int call_type, xmlNode * request,
	gboolean * local_notify, gboolean * needs_reply, gboolean * process,
	gboolean * needs_forward)
	{
	const char *op = NULL;
	const char *host = NULL;
	const char *delegated = NULL;
	const char *originator = crm_element_value(request, F_ORIG);
	const char *reply_to = crm_element_value(request, F_CIB_ISREPLY);
	const char *update = crm_element_value(request, F_CIB_GLOBAL_UPDATE);

	gboolean is_reply = safe_str_eq(reply_to, cib_our_uname);

	if (crm_is_true(update)) {
	*needs_reply = FALSE;
	if (is_reply) {
	*local_notify = TRUE;
	crm_trace("Processing global/peer update from %s"
	" that originated from us", originator);
	} else {
	crm_trace("Processing global/peer update from %s", originator);
	}
	return TRUE;
	}

	host = crm_element_value(request, F_CIB_HOST);
	if (host != NULL && safe_str_eq(host, cib_our_uname)) {
	crm_trace("Processing request sent to us from %s", originator);
	return TRUE;

	} else if (host == NULL && cib_is_master == TRUE) {
	crm_trace("Processing request sent to master instance from %s", originator);
	return TRUE;
	}

	op = crm_element_value(request, F_CIB_OPERATION);
	if(safe_str_eq(op, "cib_shutdown_req")) {
	/* Always process these */
	*local_notify = FALSE;
	if(reply_to == NULL \|\| is_reply) {
	*process = TRUE;
	}
	if(is_reply) {
	*needs_reply = FALSE;
	}
	return *process;
	}

	if (is_reply) {
	crm_trace("Forward reply sent from %s to local clients", originator);
	*process = FALSE;
	*needs_reply = FALSE;
	*local_notify = TRUE;
	return TRUE;
	}

	delegated = crm_element_value(request, F_CIB_DELEGATED);
	if (delegated != NULL) {
	crm_trace("Ignoring msg for master instance");

	} else if (host != NULL) {
	/* this is for a specific instance and we're not it */
	crm_trace("Ignoring msg for instance on %s", crm_str(host));

	} else if (reply_to == NULL && cib_is_master == FALSE) {
	/* this is for the master instance and we're not it */
	crm_trace("Ignoring reply to %s", crm_str(reply_to));

	} else if (safe_str_eq(op, "cib_shutdown_req")) {
	if (reply_to != NULL) {
	crm_debug("Processing %s from %s", op, host);
	*needs_reply = FALSE;

	} else {
	crm_debug("Processing %s reply from %s", op, host);
	}
	return TRUE;

	} else {
	crm_err("Nothing for us to do?");
	crm_log_xml_err(request, "Peer[inbound]");
	}

	return FALSE;
	}

	static void
	forward_request(xmlNode * request, cib_client_t * cib_client, int call_options)
	{
	const char *op = crm_element_value(request, F_CIB_OPERATION);
	const char *host = crm_element_value(request, F_CIB_HOST);

	crm_xml_add(request, F_CIB_DELEGATED, cib_our_uname);

	if (host != NULL) {
	crm_trace("Forwarding %s op to %s", op, host);
	send_cluster_message(crm_get_peer(0, host), crm_msg_cib, request, FALSE);

	} else {
	crm_trace("Forwarding %s op to master instance", op);
	send_cluster_message(NULL, crm_msg_cib, request, FALSE);
	}

	/* Return the request to its original state */
	xml_remove_prop(request, F_CIB_DELEGATED);

	if (call_options & cib_discard_reply) {
	crm_trace("Client not interested in reply");
	}
	}

	static gboolean
	send_peer_reply(xmlNode * msg, xmlNode * result_diff, const char *originator, gboolean broadcast)
	{
	CRM_ASSERT(msg != NULL);

	if (broadcast) {
	/* this (successful) call modified the CIB _and_ the
	* change needs to be broadcast...
	* send via HA to other nodes
	*/
	int diff_add_updates = 0;
	int diff_add_epoch = 0;
	int diff_add_admin_epoch = 0;

	int diff_del_updates = 0;
	int diff_del_epoch = 0;
	int diff_del_admin_epoch = 0;

	const char *digest = NULL;

	CRM_LOG_ASSERT(result_diff != NULL);
	digest = crm_element_value(result_diff, XML_ATTR_DIGEST);
	cib_diff_version_details(result_diff,
	&diff_add_admin_epoch, &diff_add_epoch, &diff_add_updates,
	&diff_del_admin_epoch, &diff_del_epoch, &diff_del_updates);

	crm_trace("Sending update diff %d.%d.%d -> %d.%d.%d %s",
	diff_del_admin_epoch, diff_del_epoch, diff_del_updates,
	diff_add_admin_epoch, diff_add_epoch, diff_add_updates, digest);

	crm_xml_add(msg, F_CIB_ISREPLY, originator);
	crm_xml_add(msg, F_CIB_GLOBAL_UPDATE, XML_BOOLEAN_TRUE);
	crm_xml_add(msg, F_CIB_OPERATION, CIB_OP_APPLY_DIFF);

	CRM_ASSERT(digest != NULL);

	add_message_xml(msg, F_CIB_UPDATE_DIFF, result_diff);
	crm_log_xml_trace(msg, "copy");
	return send_cluster_message(NULL, crm_msg_cib, msg, TRUE);

	} else if (originator != NULL) {
	/* send reply via HA to originating node */
	crm_trace("Sending request result to originator only");
	crm_xml_add(msg, F_CIB_ISREPLY, originator);
	return send_cluster_message(crm_get_peer(0, originator), crm_msg_cib, msg, FALSE);
	}

	return FALSE;
	}

	void
	cib_process_request(xmlNode * request, gboolean force_synchronous, gboolean privileged,
	gboolean unused, cib_client_t * cib_client)
	{
	int call_type = 0;
	int call_options = 0;

	gboolean process = TRUE;
	gboolean is_update = TRUE;
	gboolean from_peer = TRUE;
	gboolean needs_reply = TRUE;
	gboolean local_notify = FALSE;
	gboolean needs_forward = FALSE;
	gboolean global_update = crm_is_true(crm_element_value(request, F_CIB_GLOBAL_UPDATE));

	xmlNode *op_reply = NULL;
	xmlNode *result_diff = NULL;

	int rc = pcmk_ok;
	const char *op = crm_element_value(request, F_CIB_OPERATION);
	const char *originator = crm_element_value(request, F_ORIG);
	const char *host = crm_element_value(request, F_CIB_HOST);
	const char *target = NULL;
	const char *client_id = crm_element_value(request, F_CIB_CLIENTID);

	if(cib_client) {
	from_peer = FALSE;
	}

	cib_num_ops++;
	if (cib_num_ops == 0) {
	cib_num_fail = 0;
	cib_num_local = 0;
	cib_num_updates = 0;
	crm_info("Stats wrapped around");
	}

	crm_element_value_int(request, F_CIB_CALLOPTS, &call_options);
	if (force_synchronous) {
	call_options \|= cib_sync_call;
	}

	if (host != NULL && strlen(host) == 0) {
	host = NULL;
	}

	if(host) {
	target = host;

	} else if(call_options & cib_scope_local) {
	target = "local host";

	} else {
	target = "master";
	}

	if(from_peer) {
	crm_trace("Processing peer %s operation from %s on %s intended for %s",
	op, client_id, originator, target);
	} else {
	crm_xml_add(request, F_ORIG, cib_our_uname);
	crm_trace("Processing local %s operation from %s intended for %s",
	op, client_id, target);
	}

	rc = cib_get_operation_id(op, &call_type);
	if (rc != pcmk_ok) {
	/* TODO: construct error reply? */
	crm_err("Pre-processing of command failed: %s", pcmk_strerror(rc));
	return;
	}

	if (from_peer == FALSE) {
	parse_local_options(cib_client, call_type, call_options, host, op,
	&local_notify, &needs_reply, &process, &needs_forward);

	} else if (parse_peer_options(call_type, request, &local_notify,
	&needs_reply, &process, &needs_forward) == FALSE) {
	return;
	}

	is_update = cib_op_modifies(call_type);
	if (is_update) {
	cib_num_updates++;
	}

	if (call_options & cib_discard_reply) {
	needs_reply = is_update;
	local_notify = FALSE;
	}

	if (needs_forward) {
	const char *host = crm_element_value(request, F_CIB_HOST);
	const char *section = crm_element_value(request, F_CIB_SECTION);

	crm_info("Forwarding %s operation for section %s to %s (origin=%s/%s/%s)",
	op,
	section ? section : "'all'",
	host ? host : "master",
	originator ? originator : "local",
	crm_element_value(request, F_CIB_CLIENTNAME),
	crm_element_value(request, F_CIB_CALLID));

	forward_request(request, cib_client, call_options);
	return;
	}

	if (cib_status != pcmk_ok) {
	rc = cib_status;
	crm_err("Operation ignored, cluster configuration is invalid."
	" Please repair and restart: %s", pcmk_strerror(cib_status));
	op_reply = cib_construct_reply(request, the_cib, cib_status);

	} else if (process) {
	int level = LOG_INFO;
	const char *section = crm_element_value(request, F_CIB_SECTION);

	cib_num_local++;
	rc = cib_process_command(request, &op_reply, &result_diff, privileged);

	if (global_update) {
	switch (rc) {
	case pcmk_ok:
	level = LOG_INFO;
	break;
	case -pcmk_err_old_data:
	case -pcmk_err_diff_resync:
	case -pcmk_err_diff_failed:
	level = LOG_TRACE;
	break;
	default:
	level = LOG_ERR;
	}

	} else if (rc != pcmk_ok && is_update) {
	cib_num_fail++;
	level = LOG_WARNING;
	/*
	} else if (safe_str_eq(op, CIB_OP_QUERY)) {
	level = LOG_TRACE;

	} else if (safe_str_eq(op, CIB_OP_SLAVE)) {
	level = LOG_TRACE;

	} else if (safe_str_eq(section, XML_CIB_TAG_STATUS)) {
	level = LOG_TRACE;
	*/
	}

	do_crm_log(level,
	"Completed %s operation for section %s: %s (rc=%d, origin=%s/%s/%s, version=%s.%s.%s)",
	op, section ? section : "'all'", pcmk_strerror(rc), rc,

	originator ? originator : "local",
	crm_element_value(request, F_CIB_CLIENTNAME),
	crm_element_value(request, F_CIB_CALLID),

	the_cib ? crm_element_value(the_cib, XML_ATTR_GENERATION_ADMIN) : "0",
	the_cib ? crm_element_value(the_cib, XML_ATTR_GENERATION) : "0",
	the_cib ? crm_element_value(the_cib, XML_ATTR_NUMUPDATES) : "0"
	);

	if (op_reply == NULL && (needs_reply \|\| local_notify)) {
	crm_err("Unexpected NULL reply to message");
	crm_log_xml_err(request, "null reply");
	needs_reply = FALSE;
	local_notify = FALSE;
	}
	}
	/* from now on we are the server */
	if (needs_reply == FALSE \|\| stand_alone) {
	/* nothing more to do...
	* this was a non-originating slave update
	*/
	crm_trace("Completed slave update");

	} else if (rc == pcmk_ok && result_diff != NULL && !(call_options & cib_inhibit_bcast)) {
	gboolean broadcast = FALSE;

	cib_local_bcast_num++;
	crm_xml_add_int(request, F_CIB_LOCAL_NOTIFY_ID, cib_local_bcast_num);
	broadcast = send_peer_reply(request, result_diff, originator, TRUE);

	if (broadcast &&
	client_id &&
	local_notify &&
	op_reply) {

	/* If we have been asked to sync the reply,
	* and a bcast msg has gone out, we queue the local notify
	* until we know the bcast message has been received */
	local_notify = FALSE;
	crm_trace("Queuing local %ssync notification for %s", (call_options & cib_sync_call)?"":"a-", client_id);

	queue_local_notify(op_reply, client_id, (call_options & cib_sync_call), from_peer);
	op_reply = NULL; /* the reply is queued, so don't free here */
	}

	} else if (call_options & cib_discard_reply) {
	crm_trace("Caller isn't interested in reply");

	} else if (from_peer) {
	if (is_update == FALSE \|\| result_diff == NULL) {
	crm_trace("Request not broadcast: R/O call");

	} else if (call_options & cib_inhibit_bcast) {
	crm_trace("Request not broadcast: inhibited");

	} else if (rc != pcmk_ok) {
	crm_trace("Request not broadcast: call failed: %s", pcmk_strerror(rc));
	} else {
	crm_trace("Directing reply to %s", originator);
	}

	send_peer_reply(op_reply, result_diff, originator, FALSE);
	}

	if (local_notify && client_id) {
	crm_trace("Performing local %ssync notification for %s", (call_options & cib_sync_call)?"":"a-", client_id);
	if (process == FALSE) {
	do_local_notify(request, client_id, call_options & cib_sync_call, from_peer);
	} else {
	do_local_notify(op_reply, client_id, call_options & cib_sync_call, from_peer);
	}
	}

	free_xml(op_reply);
	free_xml(result_diff);

	return;
	}

	xmlNode *
	cib_construct_reply(xmlNode * request, xmlNode * output, int rc)
	{
	int lpc = 0;
	xmlNode *reply = NULL;
	const char *name = NULL;
	const char *value = NULL;

	const char *names[] = {
	F_CIB_OPERATION,
	F_CIB_CALLID,
	F_CIB_CLIENTID,
	F_CIB_CALLOPTS
	};
	static int max = DIMOF(names);

	crm_trace("Creating a basic reply");
	reply = create_xml_node(NULL, "cib-reply");
	crm_xml_add(reply, F_TYPE, T_CIB);

	for (lpc = 0; lpc < max; lpc++) {
	name = names[lpc];
	value = crm_element_value(request, name);
	crm_xml_add(reply, name, value);
	}

	crm_xml_add_int(reply, F_CIB_RC, rc);

	if (output != NULL) {
	crm_trace("Attaching reply output");
	add_message_xml(reply, F_CIB_CALLDATA, output);
	}
	return reply;
	}

	int
	cib_process_command(xmlNode * request, xmlNode reply, xmlNode cib_diff, gboolean privileged)
	{
	xmlNode *input = NULL;
	xmlNode *output = NULL;
	xmlNode *result_cib = NULL;
	xmlNode *current_cib = NULL;

	#if ENABLE_ACL
	xmlNode *filtered_current_cib = NULL;
	#endif

	int call_type = 0;
	int call_options = 0;
	int log_level = LOG_TRACE;

	const char *op = NULL;
	const char *section = NULL;

	int rc = pcmk_ok;
	int rc2 = pcmk_ok;

	gboolean send_r_notify = FALSE;
	gboolean global_update = FALSE;
	gboolean config_changed = FALSE;
	gboolean manage_counters = TRUE;

	CRM_ASSERT(cib_status == pcmk_ok);

	*reply = NULL;
	*cib_diff = NULL;
	current_cib = the_cib;

	/* Start processing the request... */
	op = crm_element_value(request, F_CIB_OPERATION);
	crm_element_value_int(request, F_CIB_CALLOPTS, &call_options);
	rc = cib_get_operation_id(op, &call_type);

	if (rc == pcmk_ok && privileged == FALSE) {
	rc = cib_op_can_run(call_type, call_options, privileged, global_update);
	}

	rc2 = cib_op_prepare(call_type, request, &input, &section);
	if (rc == pcmk_ok) {
	rc = rc2;
	}

	if (rc != pcmk_ok) {
	crm_trace("Call setup failed: %s", pcmk_strerror(rc));
	goto done;

	} else if (cib_op_modifies(call_type) == FALSE) {
	#if ENABLE_ACL
	if (acl_enabled(config_hash) == FALSE
	\|\| acl_filter_cib(request, current_cib, current_cib, &filtered_current_cib) == FALSE) {
	rc = cib_perform_op(op, call_options, cib_op_func(call_type), TRUE,
	section, request, input, FALSE, &config_changed,
	current_cib, &result_cib, NULL, &output);

	} else if (filtered_current_cib == NULL) {
	crm_debug("Pre-filtered the entire cib");
	rc = -EACCES;

	} else {
	crm_debug("Pre-filtered the queried cib according to the ACLs");
	rc = cib_perform_op(op, call_options, cib_op_func(call_type), TRUE,
	section, request, input, FALSE, &config_changed,
	filtered_current_cib, &result_cib, NULL, &output);
	}
	#else
	rc = cib_perform_op(op, call_options, cib_op_func(call_type), TRUE,
	section, request, input, FALSE, &config_changed,
	current_cib, &result_cib, NULL, &output);

	#endif

	CRM_CHECK(result_cib == NULL, free_xml(result_cib));
	goto done;
	}

	/* Handle a valid write action */
	global_update = crm_is_true(crm_element_value(request, F_CIB_GLOBAL_UPDATE));
	if (global_update) {
	manage_counters = FALSE;
	call_options \|= cib_force_diff;

	CRM_CHECK(call_type == 3 \|\| call_type == 4, crm_err("Call type: %d", call_type);
	crm_log_xml_err(request, "bad op"));
	}
	#ifdef SUPPORT_PRENOTIFY
	if ((call_options & cib_inhibit_notify) == 0) {
	cib_pre_notify(call_options, op, the_cib, input);
	}
	#endif

	if (rc == pcmk_ok) {
	if (call_options & cib_inhibit_bcast) {
	/* skip */
	crm_trace("Skipping update: inhibit broadcast");
	manage_counters = FALSE;
	}

	/* result_cib must not be modified after cib_perform_op() returns */
	rc = cib_perform_op(op, call_options, cib_op_func(call_type), FALSE,
	section, request, input, manage_counters, &config_changed,
	current_cib, &result_cib, cib_diff, &output);

	#if ENABLE_ACL
	if (acl_enabled(config_hash) == TRUE
	&& acl_check_diff(request, current_cib, result_cib, *cib_diff) == FALSE) {
	rc = -EACCES;
	}
	#endif

	if (manage_counters == FALSE) {
	/* If the diff is NULL at this point, its because nothing changed */
	config_changed = cib_config_changed(NULL, NULL, cib_diff);
	}

	/* Always write to disk for replace ops,
	* this also negates the need to detect ordering changes
	*/
	if (crm_str_eq(CIB_OP_REPLACE, op, TRUE)) {
	config_changed = TRUE;
	}
	}

	if (rc == pcmk_ok && (call_options & cib_dryrun) == 0) {
	rc = activateCibXml(result_cib, config_changed, op);
	if (rc == pcmk_ok && cib_internal_config_changed(*cib_diff)) {
	cib_read_config(config_hash, result_cib);
	}

	if (crm_str_eq(CIB_OP_REPLACE, op, TRUE)) {
	if (section == NULL) {
	send_r_notify = TRUE;

	} else if (safe_str_eq(section, XML_TAG_CIB)) {
	send_r_notify = TRUE;

	} else if (safe_str_eq(section, XML_CIB_TAG_NODES)) {
	send_r_notify = TRUE;

	} else if (safe_str_eq(section, XML_CIB_TAG_STATUS)) {
	send_r_notify = TRUE;
	}

	} else if (crm_str_eq(CIB_OP_ERASE, op, TRUE)) {
	send_r_notify = TRUE;
	}

	} else if (rc == -pcmk_err_dtd_validation) {
	if (output != NULL) {
	crm_log_xml_info(output, "cib:output");
	free_xml(output);
	}
	#if ENABLE_ACL
	{
	xmlNode *filtered_result_cib = NULL;

	if (acl_enabled(config_hash) == FALSE
	\|\| acl_filter_cib(request, current_cib, result_cib,
	&filtered_result_cib) == FALSE) {
	output = result_cib;

	} else {
	crm_debug("Filtered the result cib for output according to the ACLs");
	output = filtered_result_cib;
	if (result_cib != NULL) {
	free_xml(result_cib);
	}
	}
	}
	#else
	output = result_cib;
	#endif

	} else {
	free_xml(result_cib);
	}

	if ((call_options & cib_inhibit_notify) == 0) {
	const char *call_id = crm_element_value(request, F_CIB_CALLID);
	const char *client = crm_element_value(request, F_CIB_CLIENTNAME);

	#ifdef SUPPORT_POSTNOTIFY
	cib_post_notify(call_options, op, input, rc, the_cib);
	#endif
	cib_diff_notify(call_options, client, call_id, op, input, rc, *cib_diff);
	}

	if (send_r_notify) {
	const char *origin = crm_element_value(request, F_ORIG);

	cib_replace_notify(origin, the_cib, rc, *cib_diff);
	}

	if (rc != pcmk_ok) {
	log_level = LOG_TRACE;
	if (rc == -pcmk_err_dtd_validation && global_update) {
	log_level = LOG_WARNING;
	crm_log_xml_info(input, "cib:global_update");
	}

	} else if (config_changed) {
	log_level = LOG_TRACE;
	if (cib_is_master) {
	log_level = LOG_NOTICE;
	}

	} else if (cib_is_master) {
	log_level = LOG_TRACE;
	}

	log_cib_diff(log_level, *cib_diff, "cib:diff");

	done:
	if ((call_options & cib_discard_reply) == 0) {
	*reply = cib_construct_reply(request, output, rc);
	crm_log_xml_trace(*reply, "cib:reply");
	}
	#if ENABLE_ACL
	if (filtered_current_cib != NULL) {
	free_xml(filtered_current_cib);
	}
	#endif

	if (call_type >= 0) {
	cib_op_cleanup(call_type, call_options, &input, &output);
	}
	return rc;
	}

	gint
	cib_GCompareFunc(gconstpointer a, gconstpointer b)
	{
	const xmlNode *a_msg = a;
	const xmlNode *b_msg = b;

	int msg_a_id = 0;
	int msg_b_id = 0;
	const char *value = NULL;

	value = crm_element_value_const(a_msg, F_CIB_CALLID);
	msg_a_id = crm_parse_int(value, NULL);

	value = crm_element_value_const(b_msg, F_CIB_CALLID);
	msg_b_id = crm_parse_int(value, NULL);

	if (msg_a_id == msg_b_id) {
	return 0;
	} else if (msg_a_id < msg_b_id) {
	return -1;
	}
	return 1;
	}

	#if SUPPORT_HEARTBEAT
	void
	cib_ha_peer_callback(HA_Message * msg, void *private_data)
	{
	xmlNode *xml = convert_ha_message(NULL, msg, __FUNCTION__);

	cib_peer_callback(xml, private_data);
	free_xml(xml);
	}
	#endif

	void
	cib_peer_callback(xmlNode * msg, void *private_data)
	{
	const char *reason = NULL;
	const char *originator = crm_element_value(msg, F_ORIG);

	if (originator == NULL \|\| crm_str_eq(originator, cib_our_uname, TRUE)) {
	/* message is from ourselves */
	int bcast_id = 0;
	if (!(crm_element_value_int(msg, F_CIB_LOCAL_NOTIFY_ID, &bcast_id))) {
	check_local_notify(bcast_id);
	}
	return;

	} else if (crm_peer_cache == NULL) {
	reason = "membership not established";
	goto bail;
	}

	if (crm_element_value(msg, F_CIB_CLIENTNAME) == NULL) {
	crm_xml_add(msg, F_CIB_CLIENTNAME, originator);
	}

	/* crm_log_xml_trace("Peer[inbound]", msg); */
	cib_process_request(msg, FALSE, TRUE, TRUE, NULL);
	return;

	bail:
	if (reason) {
	const char *seq = crm_element_value(msg, F_SEQ);
	const char *op = crm_element_value(msg, F_CIB_OPERATION);

	crm_warn("Discarding %s message (%s) from %s: %s", op, seq, originator, reason);
	}
	}


	#if SUPPORT_HEARTBEAT
	extern oc_ev_t *cib_ev_token;
	static void *ccm_library = NULL;
	int (ccm_api_callback_done) (void cookie) = NULL;
	int (ccm_api_handle_event) (const oc_ev_t token) = NULL;

	void
	cib_client_status_callback(const char node, const char client, const char status, void private)
	{
	crm_node_t *peer = NULL;

	if (safe_str_eq(client, CRM_SYSTEM_CIB)) {
	crm_info("Status update: Client %s/%s now has status [%s]", node, client, status);

	if (safe_str_eq(status, JOINSTATUS)) {
	status = ONLINESTATUS;

	} else if (safe_str_eq(status, LEAVESTATUS)) {
	status = OFFLINESTATUS;
	}

	peer = crm_get_peer(0, node);
	crm_update_peer_proc(__FUNCTION__, peer, crm_proc_cib, status);
	}
	return;
	}

	int
	cib_ccm_dispatch(gpointer user_data)
	{
	int rc = 0;
	oc_ev_t ccm_token = (oc_ev_t ) user_data;

	crm_trace("received callback");

	if (ccm_api_handle_event == NULL) {
	ccm_api_handle_event =
	find_library_function(&ccm_library, CCM_LIBRARY, "oc_ev_handle_event", 1);
	}

	rc = (*ccm_api_handle_event) (ccm_token);
	if (0 == rc) {
	return 0;
	}

	crm_err("CCM connection appears to have failed: rc=%d.", rc);

	/* eventually it might be nice to recover and reconnect... but until then... */
	crm_err("Exiting to recover from CCM connection failure");
	crm_exit(2);

	return -1;
	}

	int current_instance = 0;
	void
	cib_ccm_msg_callback(oc_ed_t event, void cookie, size_t size, const void data)
	{
	gboolean update_id = FALSE;
	const oc_ev_membership_t *membership = data;

	CRM_ASSERT(membership != NULL);

	crm_info("Processing CCM event=%s (id=%d)", ccm_event_name(event), membership->m_instance);

	if (current_instance > membership->m_instance) {
	crm_err("Membership instance ID went backwards! %d->%d",
	current_instance, membership->m_instance);
	CRM_ASSERT(current_instance <= membership->m_instance);
	}

	switch (event) {
	case OC_EV_MS_NEW_MEMBERSHIP:
	case OC_EV_MS_INVALID:
	update_id = TRUE;
	break;
	case OC_EV_MS_PRIMARY_RESTORED:
	update_id = TRUE;
	break;
	case OC_EV_MS_NOT_PRIMARY:
	crm_trace("Ignoring transitional CCM event: %s", ccm_event_name(event));
	break;
	case OC_EV_MS_EVICTED:
	crm_err("Evicted from CCM: %s", ccm_event_name(event));
	break;
	default:
	crm_err("Unknown CCM event: %d", event);
	}

	if (update_id) {
	unsigned int lpc = 0;

	CRM_CHECK(membership != NULL, return);

	current_instance = membership->m_instance;

	for (lpc = 0; lpc < membership->m_n_out; lpc++) {
	crm_update_ccm_node(membership, lpc + membership->m_out_idx, CRM_NODE_LOST,
	current_instance);
	}

	for (lpc = 0; lpc < membership->m_n_member; lpc++) {
	crm_update_ccm_node(membership, lpc + membership->m_memb_idx, CRM_NODE_ACTIVE,
	current_instance);
	}
	}

	if (ccm_api_callback_done == NULL) {
	ccm_api_callback_done =
	find_library_function(&ccm_library, CCM_LIBRARY, "oc_ev_callback_done", 1);
	}
	(*ccm_api_callback_done) (cookie);
	return;
	}
	#endif

	gboolean
	can_write(int flags)
	{
	return TRUE;
	}

	static gboolean
	cib_force_exit(gpointer data)
	{
	crm_notice("Forcing exit!");
	terminate_cib(__FUNCTION__, TRUE);
	return FALSE;
	}

	static void
	disconnect_remote_client(gpointer key, gpointer value, gpointer user_data)
	{
	cib_client_t *a_client = value;
	crm_err("Disconnecting %s... Not implemented", crm_str(a_client->name));
	}

	void
	cib_shutdown(int nsig)
	{
	struct qb_ipcs_stats srv_stats;
	if (cib_shutdown_flag == FALSE) {
	int disconnects = 0;
	qb_ipcs_connection_t *c = NULL;

	cib_shutdown_flag = TRUE;

	c = qb_ipcs_connection_first_get(ipcs_rw);
	while(c != NULL) {
	qb_ipcs_connection_t *last = c;
	c = qb_ipcs_connection_next_get(ipcs_rw, last);

	crm_debug("Disconnecting r/w client %p...", last);
	qb_ipcs_disconnect(last);
	qb_ipcs_connection_unref(last);
	disconnects++;
	}

	c = qb_ipcs_connection_first_get(ipcs_ro);
	while(c != NULL) {
	qb_ipcs_connection_t *last = c;
	c = qb_ipcs_connection_next_get(ipcs_ro, last);

	crm_debug("Disconnecting r/o client %p...", last);
	qb_ipcs_disconnect(last);
	qb_ipcs_connection_unref(last);
	disconnects++;
	}

	c = qb_ipcs_connection_first_get(ipcs_shm);
	while(c != NULL) {
	qb_ipcs_connection_t *last = c;
	c = qb_ipcs_connection_next_get(ipcs_shm, last);

	crm_debug("Disconnecting non-blocking r/w client %p...", last);
	qb_ipcs_disconnect(last);
	qb_ipcs_connection_unref(last);
	disconnects++;
	}

	disconnects += g_hash_table_size(client_list);

	crm_debug("Disconnecting %d remote clients", g_hash_table_size(client_list));
	g_hash_table_foreach(client_list, disconnect_remote_client, NULL);
	crm_info("Disconnected %d clients", disconnects);
	}

	qb_ipcs_stats_get(ipcs_rw, &srv_stats, QB_FALSE);

	if(g_hash_table_size(client_list) == 0) {
	crm_info("All clients disconnected (%d)", srv_stats.active_connections);
	initiate_exit();

	} else {
	crm_info("Waiting on %d clients to disconnect (%d)", g_hash_table_size(client_list), srv_stats.active_connections);
	}
	}

	void
	initiate_exit(void)
	{
	int active = 0;
	xmlNode *leaving = NULL;

	active = crm_active_peers();
	if (active < 2) {
	terminate_cib(__FUNCTION__, FALSE);
	return;
	}

	crm_info("Sending disconnect notification to %d peers...", active);

	leaving = create_xml_node(NULL, "exit-notification");
	crm_xml_add(leaving, F_TYPE, "cib");
	crm_xml_add(leaving, F_CIB_OPERATION, "cib_shutdown_req");

	send_cluster_message(NULL, crm_msg_cib, leaving, TRUE);
	free_xml(leaving);

	g_timeout_add(crm_get_msec("5s"), cib_force_exit, NULL);
	}

	extern int remote_fd;
	extern int remote_tls_fd;
	extern void terminate_cs_connection(void);

	void
	terminate_cib(const char *caller, gboolean fast)
	{
	if (remote_fd > 0) {
	close(remote_fd);
	remote_fd = 0;
	}
	if (remote_tls_fd > 0) {
	close(remote_tls_fd);
	remote_tls_fd = 0;
	}

	if(!fast) {
	crm_info("%s: Disconnecting from cluster infrastructure", caller);
	crm_cluster_disconnect(&crm_cluster);
	}

	uninitializeCib();

	crm_info("%s: Exiting%s...", caller, fast?" fast":mainloop?" from mainloop":"");

	if(fast == FALSE && mainloop != NULL && g_main_is_running(mainloop)) {
	g_main_quit(mainloop);

	} else {
	qb_ipcs_destroy(ipcs_ro);
	qb_ipcs_destroy(ipcs_rw);
	qb_ipcs_destroy(ipcs_shm);

	if (fast) {
	crm_exit(EX_USAGE);
	} else {
	crm_exit(EX_OK);
	}
	}
	}

File Metadata

Mime Type: text/x-c
Expires: Thu, Oct 16, 3:03 PM (15 h, 56 m)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 2536411
Default Alt Text: callbacks.c (43 KB)

callbacks.cNo OneTemporaryActions

callbacks.cView Options

File Metadata

Event Timeline

callbacks.c
No OneTemporary
Actions

callbacks.c
View Options