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common.c

/* 
 * 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 2.1 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <crm_internal.h>
#include <crm/crm.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crm/common/util.h>

#include <glib.h>

#include <crm/pengine/status.h>
#include <crm/pengine/common.h>

gboolean was_processing_error = FALSE;
gboolean was_processing_warning = FALSE;

static gboolean
check_quorum(const char *value) 
{
      if(safe_str_eq(value, "stop")) {
            return TRUE;

      } else if(safe_str_eq(value, "freeze")) {
            return TRUE;

      } else if(safe_str_eq(value, "ignore")) {
            return TRUE;
      }
      return FALSE;
}

static gboolean
check_stonith_action(const char *value) 
{
      if(safe_str_eq(value, "reboot")) {
            return TRUE;

      } else if(safe_str_eq(value, "poweroff")) {
            return TRUE;
      }
      return FALSE;
}

pe_cluster_option pe_opts[] = {
      /* name, old-name, validate, default, description */
      { "no-quorum-policy", "no_quorum_policy", "enum", "stop, freeze, ignore", "stop", &check_quorum,
        "What to do when the cluster does not have quorum", NULL },
      { "symmetric-cluster", "symmetric_cluster", "boolean", NULL, "true", &check_boolean,
        "All resources can run anywhere by default", NULL },
      { "stonith-enabled", "stonith_enabled", "boolean", NULL, "false", &check_boolean,
        "Failed nodes are STONITH'd", NULL },
      { "stonith-action", "stonith_action", "enum", "reboot, poweroff", "reboot", &check_stonith_action,
        "Action to send to STONITH device", NULL },
      { "default-resource-stickiness", "default_resource_stickiness", "integer", NULL, "0", &check_number, "", NULL },
      { "default-resource-failure-stickiness", "default_resource_failure_stickiness", "integer", NULL, "0", &check_number, "", NULL },
      { "is-managed-default", "is_managed_default", "boolean", NULL, "true", &check_boolean,
        "Should the cluster start/stop resources as required", NULL },
      { "cluster-delay", "transition_idle_timeout", "time", NULL, "60s", &check_time,
        "Round trip delay over the network (excluding action execution)",
        "The \"correct\" value will depend on the speed and load of your network and cluster nodes." },
      { "batch-limit", NULL, "integer", NULL, "30", &check_number,
        "The number of jobs that the TE is allowed to execute in parallel",
        "The \"correct\" value will depend on the speed and load of your network and cluster nodes." },
      { "default-action-timeout", "default_action_timeout", "time", NULL, "20s", &check_time,
        "How long to wait for actions to complete", NULL },
      { "stop-orphan-resources", "stop_orphan_resources", "boolean", NULL, "true", &check_boolean,
        "Should deleted resources be stopped", NULL },
      { "stop-orphan-actions", "stop_orphan_actions", "boolean", NULL, "true", &check_boolean,
        "Should deleted actions be cancelled", NULL },
      { "remove-after-stop", "remove_after_stop", "boolean", NULL, "false", &check_boolean,
        "Remove resources from the LRM after they are stopped",
        "Always set this to false.  Other values are, at best, poorly tested and potentially dangerous." },
/*    { "", "", , "0", "", NULL }, */
      { "pe-error-series-max", NULL, "integer", NULL, "-1", &check_number,
        "The number of PE inputs resulting in ERRORs to save", "Zero to disable, -1 to store unlimited." },
      { "pe-warn-series-max",  NULL, "integer", NULL, "-1", &check_number,
        "The number of PE inputs resulting in WARNINGs to save", "Zero to disable, -1 to store unlimited." },
      { "pe-input-series-max", NULL, "integer", NULL, "-1", &check_number,
        "The number of other PE inputs to save", "Zero to disable, -1 to store unlimited." },
      { "startup-fencing", "startup_fencing", "boolean", NULL, "true", &check_boolean,
        "STONITH unseen nodes", "Advanced Use Only!  Not using the default is very unsafe!" },
      { "start-failure-is-fatal", NULL, "boolean", NULL, "true", &check_boolean, "Always treat start failures as fatal",
        "This was the old default.  However when set to FALSE, the cluster will instead use the resource's failcount and value for resource-failure-stickiness" }
};

void
pe_metadata(void)
{
      config_metadata("Policy Engine", "1.0",
                  "Policy Engine Options",
                  "This is a fake resource that details the options that can be configured for the Policy Engine.",
                  pe_opts, DIMOF(pe_opts));
}

void
verify_pe_options(GHashTable *options)
{
      verify_all_options(options, pe_opts, DIMOF(pe_opts));
}

const char *
pe_pref(GHashTable *options, const char *name)
{
      return get_cluster_pref(options, pe_opts, DIMOF(pe_opts), name);
}

const char *
fail2text(enum action_fail_response fail)
{
      const char *result = "<unknown>";
      switch(fail)
      {
            case action_fail_ignore:
                  result = "ignore";
                  break;
            case action_fail_block:
                  result = "block";
                  break;
            case action_fail_recover:
                  result = "recover";
                  break;
            case action_fail_migrate:
                  result = "migrate";
                  break;
            case action_fail_stop:
                  result = "stop";
                  break;
            case action_migrate_failure:
                  result = "atomic migration recovery";
                  break;
            case action_fail_fence:
                  result = "fence";
                  break;
      }
      return result;
}



enum action_tasks
text2task(const char *task) 
{
      if(safe_str_eq(task, CRMD_ACTION_STOP)) {
            return stop_rsc;
      } else if(safe_str_eq(task, CRMD_ACTION_STOPPED)) {
            return stopped_rsc;
      } else if(safe_str_eq(task, CRMD_ACTION_START)) {
            return start_rsc;
      } else if(safe_str_eq(task, CRMD_ACTION_STARTED)) {
            return started_rsc;
      } else if(safe_str_eq(task, CRM_OP_SHUTDOWN)) {
            return shutdown_crm;
      } else if(safe_str_eq(task, CRM_OP_FENCE)) {
            return stonith_node;
      } else if(safe_str_eq(task, CRMD_ACTION_STATUS)) {
            return monitor_rsc;
      } else if(safe_str_eq(task, CRMD_ACTION_NOTIFY)) {
            return action_notify;
      } else if(safe_str_eq(task, CRMD_ACTION_NOTIFIED)) {
            return action_notified;
      } else if(safe_str_eq(task, CRMD_ACTION_PROMOTE)) {
            return action_promote;
      } else if(safe_str_eq(task, CRMD_ACTION_DEMOTE)) {
            return action_demote;
      } else if(safe_str_eq(task, CRMD_ACTION_PROMOTED)) {
            return action_promoted;
      } else if(safe_str_eq(task, CRMD_ACTION_DEMOTED)) {
            return action_demoted;
      } else if(safe_str_eq(task, CRMD_ACTION_CANCEL)) {
            return no_action;
      } else if(safe_str_eq(task, CRMD_ACTION_DELETE)) {
            return no_action;
      } else if(safe_str_eq(task, CRMD_ACTION_STATUS)) {
            return no_action;
      } else if(safe_str_eq(task, CRM_OP_PROBED)) {
            return no_action;
      } else if(safe_str_eq(task, CRM_OP_LRM_REFRESH)) {
            return no_action; 
      } else if(safe_str_eq(task, CRMD_ACTION_MIGRATE)) {
            return no_action;    
      } else if(safe_str_eq(task, CRMD_ACTION_MIGRATED)) {
            return no_action; 
      } else if(safe_str_eq(task, "fail")) {
            return no_action; 
      } else if(safe_str_eq(task, "stonith_up")) {
            return no_action; 
      } else if(safe_str_eq(task, "all_stopped")) {
            return no_action; 
      } 
      crm_config_warn("Unsupported action: %s", task);
      return no_action;
}


const char *
task2text(enum action_tasks task)
{
      const char *result = "<unknown>";
      switch(task)
      {
            case no_action:
                  result = "no_action";
                  break;
            case stop_rsc:
                  result = CRMD_ACTION_STOP;
                  break;
            case stopped_rsc:
                  result = CRMD_ACTION_STOPPED;
                  break;
            case start_rsc:
                  result = CRMD_ACTION_START;
                  break;
            case started_rsc:
                  result = CRMD_ACTION_STARTED;
                  break;
            case shutdown_crm:
                  result = CRM_OP_SHUTDOWN;
                  break;
            case stonith_node:
                  result = CRM_OP_FENCE;
                  break;
            case monitor_rsc:
                  result = CRMD_ACTION_STATUS;
                  break;
            case action_notify:
                  result = CRMD_ACTION_NOTIFY;
                  break;
            case action_notified:
                  result = CRMD_ACTION_NOTIFIED;
                  break;
            case action_promote:
                  result = CRMD_ACTION_PROMOTE;
                  break;
            case action_promoted:
                  result = CRMD_ACTION_PROMOTED;
                  break;
            case action_demote:
                  result = CRMD_ACTION_DEMOTE;
                  break;
            case action_demoted:
                  result = CRMD_ACTION_DEMOTED;
                  break;
      }
      
      return result;
}

const char *
role2text(enum rsc_role_e role) 
{
      CRM_CHECK(role >= RSC_ROLE_UNKNOWN, return RSC_ROLE_UNKNOWN_S);
      CRM_CHECK(role < RSC_ROLE_MAX, return RSC_ROLE_UNKNOWN_S);
      switch(role) {
            case RSC_ROLE_UNKNOWN:
                  return RSC_ROLE_UNKNOWN_S;
            case RSC_ROLE_STOPPED:
                  return RSC_ROLE_STOPPED_S;
            case RSC_ROLE_STARTED:
                  return RSC_ROLE_STARTED_S;
            case RSC_ROLE_SLAVE:
                  return RSC_ROLE_SLAVE_S;
            case RSC_ROLE_MASTER:
                  return RSC_ROLE_MASTER_S;
      }
      return RSC_ROLE_UNKNOWN_S;
}

enum rsc_role_e
text2role(const char *role) 
{
      if(safe_str_eq(role, RSC_ROLE_STOPPED_S)) {
            return RSC_ROLE_STOPPED;
      } else if(safe_str_eq(role, RSC_ROLE_STARTED_S)) {
            return RSC_ROLE_STARTED;
      } else if(safe_str_eq(role, RSC_ROLE_SLAVE_S)) {
            return RSC_ROLE_SLAVE;
      } else if(safe_str_eq(role, RSC_ROLE_MASTER_S)) {
            return RSC_ROLE_MASTER;
      } else if(safe_str_eq(role, RSC_ROLE_UNKNOWN_S)) {
            return RSC_ROLE_UNKNOWN;
      }
      crm_err("Unknown role: %s", role);
      return RSC_ROLE_UNKNOWN;
}

int
merge_weights(int w1, int w2) 
{
      int result = w1 + w2;

      if(w1 <= -INFINITY || w2 <= -INFINITY) {
            if(w1 >= INFINITY || w2 >= INFINITY) {
                  crm_debug_2("-INFINITY + INFINITY == -INFINITY");
            }
            return -INFINITY;

      } else if(w1 >= INFINITY || w2 >= INFINITY) {
            return INFINITY;
      }

      /* detect wrap-around */
      if(result > 0) {
            if(w1 <= 0 && w2 < 0) {
                  result = -INFINITY;
            }
            
      } else if(w1 > 0 && w2 > 0) {
            result = INFINITY;
      }

      /* detect +/- INFINITY */
      if(result >= INFINITY) {
            result = INFINITY;
            
      } else if(result <= -INFINITY) {
            result = -INFINITY;
      }

      crm_debug_5("%d + %d = %d", w1, w2, result);
      return result;
}

void
add_hash_param(GHashTable *hash, const char *name, const char *value)
{
      CRM_CHECK(hash != NULL, return);

      crm_debug_3("adding: name=%s value=%s", crm_str(name), crm_str(value));
      if(name == NULL || value == NULL) {
            return;

      } else if(safe_str_eq(value, "#default")) {
            return;
            
      } else if(g_hash_table_lookup(hash, name) == NULL) {
            g_hash_table_insert(hash, crm_strdup(name), crm_strdup(value));
      }
}

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