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/*
* 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 <unistd.h> /* sleep */
#include <crm/common/alerts_internal.h>
#include <crm/common/xml.h>
#include <crm/crm.h>
#include <crm/msg_xml.h>
#include <crmd.h>
#include <crmd_callbacks.h> /* crmd_cib_connection_destroy */
#include <crmd_fsa.h>
#include <crmd_messages.h>
struct crm_subsystem_s *cib_subsystem = NULL;
int cib_retries = 0;
static void
do_cib_updated(const char *event, xmlNode * msg)
{
if (crm_patchset_contains_alert(msg, TRUE)) {
mainloop_set_trigger(config_read);
}
}
static void
revision_check_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
{
int cmp = -1;
xmlNode *generation = NULL;
const char *revision = NULL;
if (rc != pcmk_ok) {
fsa_data_t *msg_data = NULL;
register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
return;
}
generation = output;
CRM_CHECK(safe_str_eq(crm_element_name(generation), XML_TAG_CIB),
crm_log_xml_err(output, __FUNCTION__); return);
crm_trace("Checking our feature revision %s is allowed", CRM_FEATURE_SET);
revision = crm_element_value(generation, XML_ATTR_CRM_VERSION);
cmp = compare_version(revision, CRM_FEATURE_SET);
if (cmp > 0) {
crm_err("Shutting down because the current configuration is not supported by this version "
CRM_XS " build=%s supported=%s current=%s",
PACEMAKER_VERSION, CRM_FEATURE_SET, revision);
/* go into a stall state */
register_fsa_error_adv(C_FSA_INTERNAL, I_SHUTDOWN, NULL, NULL, __FUNCTION__);
return;
}
}
static void
do_cib_replaced(const char *event, xmlNode * msg)
{
crm_debug("Updating the CIB after a replace: DC=%s", AM_I_DC ? "true" : "false");
if (AM_I_DC == FALSE) {
return;
} else if (fsa_state == S_FINALIZE_JOIN && is_set(fsa_input_register, R_CIB_ASKED)) {
/* no need to restart the join - we asked for this replace op */
return;
}
/* start the join process again so we get everyone's LRM status */
populate_cib_nodes(node_update_quick|node_update_all, __FUNCTION__);
register_fsa_input(C_FSA_INTERNAL, I_ELECTION, NULL);
}
/* A_CIB_STOP, A_CIB_START, O_CIB_RESTART */
void
do_cib_control(long long action,
enum crmd_fsa_cause cause,
enum crmd_fsa_state cur_state,
enum crmd_fsa_input current_input, fsa_data_t * msg_data)
{
CRM_ASSERT(fsa_cib_conn != NULL);
if (action & A_CIB_STOP) {
if (fsa_cib_conn->state != cib_disconnected && last_resource_update != 0) {
crm_info("Waiting for resource update %d to complete", last_resource_update);
crmd_fsa_stall(FALSE);
return;
}
crm_info("Disconnecting CIB");
clear_bit(fsa_input_register, R_CIB_CONNECTED);
fsa_cib_conn->cmds->del_notify_callback(fsa_cib_conn, T_CIB_DIFF_NOTIFY, do_cib_updated);
if (fsa_cib_conn->state != cib_disconnected) {
fsa_cib_conn->cmds->set_slave(fsa_cib_conn, cib_scope_local);
fsa_cib_conn->cmds->signoff(fsa_cib_conn);
}
crm_notice("Disconnected from the CIB");
}
if (action & A_CIB_START) {
int rc = pcmk_ok;
if (cur_state == S_STOPPING) {
crm_err("Ignoring request to start the CIB after shutdown");
return;
}
rc = fsa_cib_conn->cmds->signon(fsa_cib_conn, CRM_SYSTEM_CRMD, cib_command_nonblocking);
if (rc != pcmk_ok) {
/* a short wait that usually avoids stalling the FSA */
sleep(1);
rc = fsa_cib_conn->cmds->signon(fsa_cib_conn, CRM_SYSTEM_CRMD, cib_command_nonblocking);
}
if (rc != pcmk_ok) {
crm_info("Could not connect to the CIB service: %s", pcmk_strerror(rc));
} else if (pcmk_ok !=
fsa_cib_conn->cmds->set_connection_dnotify(fsa_cib_conn,
crmd_cib_connection_destroy)) {
crm_err("Could not set dnotify callback");
} else if (pcmk_ok !=
fsa_cib_conn->cmds->add_notify_callback(fsa_cib_conn, T_CIB_REPLACE_NOTIFY,
do_cib_replaced)) {
crm_err("Could not set CIB notification callback (replace)");
} else if (pcmk_ok !=
fsa_cib_conn->cmds->add_notify_callback(fsa_cib_conn, T_CIB_DIFF_NOTIFY,
do_cib_updated)) {
crm_err("Could not set CIB notification callback (update)");
} else {
set_bit(fsa_input_register, R_CIB_CONNECTED);
}
if (is_set(fsa_input_register, R_CIB_CONNECTED) == FALSE) {
cib_retries++;
crm_warn("Couldn't complete CIB registration %d"
" times... pause and retry", cib_retries);
if (cib_retries < 30) {
crm_timer_start(wait_timer);
crmd_fsa_stall(FALSE);
} else {
crm_err("Could not complete CIB"
" registration %d times..." " hard error", cib_retries);
register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
}
} else {
int call_id = 0;
crm_info("CIB connection established");
call_id = fsa_cib_conn->cmds->query(fsa_cib_conn, NULL, NULL, cib_scope_local);
fsa_register_cib_callback(call_id, FALSE, NULL, revision_check_callback);
cib_retries = 0;
}
}
}
/*!
* \internal
* \brief Get CIB call options to use local scope if master unavailable
*
* \return CIB call options
*/
int crmd_cib_smart_opt()
{
int call_opt = cib_quorum_override;
if (fsa_state == S_ELECTION || fsa_state == S_PENDING) {
crm_info("Sending update to local CIB in state: %s", fsa_state2string(fsa_state));
call_opt |= cib_scope_local;
}
return call_opt;
}
/*!
* \internal
* \brief Check whether an action type should be recorded in the CIB
*
* \param[in] action Action type
*
* \return TRUE if action should be recorded, FALSE otherwise
*/
bool
controld_action_is_recordable(const char *action)
{
if (safe_str_eq(action, CRMD_ACTION_CANCEL)
|| safe_str_eq(action, CRMD_ACTION_DELETE)
|| safe_str_eq(action, CRMD_ACTION_NOTIFY)
|| safe_str_eq(action, CRMD_ACTION_METADATA)) {
return FALSE;
}
return TRUE;
}
static void
cib_delete_callback(xmlNode *msg, int call_id, int rc, xmlNode *output,
void *user_data)
{
char *desc = user_data;
if (rc == 0) {
crm_debug("Deletion of %s (via CIB call %d) succeeded", desc, call_id);
} else {
crm_warn("Deletion of %s (via CIB call %d) failed: %s " CRM_XS " rc=%d",
desc, call_id, pcmk_strerror(rc), rc);
}
}
// Searches for various portions of node_state to delete
// Match a particular node's node_state (takes node name 1x)
#define XPATH_NODE_STATE "//" XML_CIB_TAG_STATE "[@" XML_ATTR_UNAME "='%s']"
// Node's lrm section (name 1x)
#define XPATH_NODE_LRM XPATH_NODE_STATE "/" XML_CIB_TAG_LRM
// Node's transient_attributes section (name 1x)
#define XPATH_NODE_ATTRS XPATH_NODE_STATE "/" XML_TAG_TRANSIENT_NODEATTRS
// Everything under node_state (name 1x)
#define XPATH_NODE_ALL XPATH_NODE_STATE "/*"
/*!
* \internal
* \brief Delete subsection of a node's CIB node_state
*
* \param[in] uname Desired node
* \param[in] section Subsection of node_state to delete
* \param[in] options CIB call options to use
*/
void
controld_delete_node_state(const char *uname, enum controld_section_e section,
int options)
{
char *xpath = NULL;
char *desc = NULL;
CRM_CHECK(uname != NULL, return);
switch (section) {
case controld_section_lrm:
xpath = crm_strdup_printf(XPATH_NODE_LRM, uname);
desc = crm_strdup_printf("resource history for node %s", uname);
break;
case controld_section_attrs:
xpath = crm_strdup_printf(XPATH_NODE_ATTRS, uname);
desc = crm_strdup_printf("transient attributes for node %s", uname);
break;
case controld_section_all:
xpath = crm_strdup_printf(XPATH_NODE_ALL, uname);
desc = crm_strdup_printf("all state for node %s", uname);
break;
}
if (fsa_cib_conn == NULL) {
crm_warn("Unable to delete %s: no CIB connection", desc);
free(desc);
} else {
int call_id;
options |= cib_quorum_override|cib_xpath;
call_id = fsa_cib_conn->cmds->delete(fsa_cib_conn, xpath, NULL, options);
crm_info("Deleting %s (via CIB call %d) " CRM_XS " xpath=%s",
desc, call_id, xpath);
fsa_register_cib_callback(call_id, FALSE, desc, cib_delete_callback);
// CIB library handles freeing desc
}
free(xpath);
}
// Takes node name and resource ID
#define XPATH_RESOURCE_HISTORY "//" XML_CIB_TAG_STATE \
"[@" XML_ATTR_UNAME "='%s'] /" \
XML_CIB_TAG_LRM "/" XML_LRM_TAG_RESOURCES \
"/" XML_LRM_TAG_RESOURCE \
"[@" XML_ATTR_ID "='%s']"
// @TODO could add "and @XML_CONFIG_ATTR_SHUTDOWN_LOCK" to limit to locks
/*!
* \internal
* \brief Clear resource history from CIB for a given resource and node
*
* \param[in] rsc_id ID of resource to be cleared
* \param[in] node Node whose resource history should be cleared
* \param[in] user_name ACL user name to use
* \param[in] call_options CIB call options
*
* \return Standard Pacemaker return code
*/
int
controld_delete_resource_history(const char *rsc_id, const char *node,
const char *user_name, int call_options)
{
char *desc = NULL;
char *xpath = NULL;
int rc = pcmk_rc_ok;
CRM_CHECK((rsc_id != NULL) && (node != NULL), return EINVAL);
desc = crm_strdup_printf("resource history for %s on %s", rsc_id, node);
if (fsa_cib_conn == NULL) {
crm_err("Unable to clear %s: no CIB connection", desc);
free(desc);
return ENOTCONN;
}
// Ask CIB to delete the entry
xpath = crm_strdup_printf(XPATH_RESOURCE_HISTORY, node, rsc_id);
rc = cib_internal_op(fsa_cib_conn, CIB_OP_DELETE, NULL, xpath, NULL,
NULL, call_options|cib_xpath, user_name);
if (rc < 0) {
rc = pcmk_legacy2rc(rc);
crm_err("Could not delete resource status of %s on %s%s%s: %s "
CRM_XS " rc=%d", rsc_id, node,
(user_name? " for user " : ""), (user_name? user_name : ""),
pcmk_rc_str(rc), rc);
free(desc);
free(xpath);
return rc;
}
if (is_set(call_options, cib_sync_call)) {
if (is_set(call_options, cib_dryrun)) {
crm_debug("Deletion of %s would succeed", desc);
} else {
crm_debug("Deletion of %s succeeded", desc);
}
free(desc);
} else {
crm_info("Clearing %s (via CIB call %d) " CRM_XS " xpath=%s",
desc, rc, xpath);
fsa_register_cib_callback(rc, FALSE, desc, cib_delete_callback);
// CIB library handles freeing desc
}
free(xpath);
return pcmk_rc_ok;
}

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