diff --git a/crm/crmd/election.c b/crm/crmd/election.c index 7e3450e19b..c126d7f650 100644 --- a/crm/crmd/election.c +++ b/crm/crmd/election.c @@ -1,324 +1,316 @@ /* * Copyright (C) 2004 Andrew Beekhof * * 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 #include #include #include #include #include #include #include #include #include void ghash_count_vote(gpointer key, gpointer value, gpointer user_data); /* A_ELECTION_VOTE */ enum crmd_fsa_input do_election_vote(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) { gboolean not_voting = FALSE; xmlNodePtr msg_options = NULL; /* dont vote if we're in one of these states or wanting to shut down */ switch(cur_state) { case S_RECOVERY: case S_STOPPING: case S_RELEASE_DC: case S_TERMINATE: crm_warn("Not voting in election, we're in state %s", fsa_state2string(cur_state)); not_voting = TRUE; break; default: if(is_set(fsa_input_register, R_SHUTDOWN)) { crm_warn("Not voting in election," " we're shutting down"); not_voting = TRUE; } break; } if(not_voting == FALSE) { if(is_set(fsa_input_register, R_STARTING)) { not_voting = TRUE; } } if(not_voting) { if(AM_I_DC) { return I_RELEASE_DC; } else { return I_NOT_DC; } } msg_options = create_xml_node(NULL, XML_TAG_OPTIONS); set_xml_property_copy(msg_options, XML_ATTR_VERSION, CRM_VERSION); send_request(msg_options, NULL, CRM_OP_VOTE, NULL, CRM_SYSTEM_CRMD, NULL); startTimer(election_timeout); return I_NULL; } gboolean do_dc_heartbeat(gpointer data) { fsa_timer_t *timer = (fsa_timer_t *)data; gboolean was_sent = send_request(NULL, NULL, CRM_OP_HBEAT, NULL, CRM_SYSTEM_CRMD, NULL); /* crm_debug("#!!#!!# Heartbeat timer just popped!"); */ if(was_sent == FALSE) { /* this is bad */ stopTimer(timer); /* dont make it go off again */ register_fsa_input(C_HEARTBEAT_FAILED, I_SHUTDOWN, NULL); s_crmd_fsa(C_HEARTBEAT_FAILED); } return TRUE; } struct election_data_s { const char *winning_uname; unsigned int winning_bornon; }; /* A_ELECTION_COUNT */ enum crmd_fsa_input do_election_count_vote(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) { gboolean we_loose = FALSE; xmlNodePtr vote = (xmlNodePtr)msg_data->data; enum crmd_fsa_input election_result = I_NULL; const char *vote_from = xmlGetProp(vote, XML_ATTR_HOSTFROM); const char *your_version = get_xml_attr( vote, XML_TAG_OPTIONS, XML_ATTR_VERSION, TRUE); oc_node_t *our_node = NULL, * your_node = NULL; struct election_data_s election_data; if(vote_from == NULL || strcmp(vote_from, fsa_our_uname) == 0) { /* dont count our own vote */ return election_result; } if(fsa_membership_copy == NULL) { /* if the membership copy is NULL we REALLY shouldnt be voting * the question is how we managed to get here. */ crm_err("Membership copy was NULL"); return I_NULL; } else if(fsa_membership_copy->members_size < 1) { /* if even we are not in the cluster then we should not vote */ return I_NULL; } our_node = (oc_node_t*) g_hash_table_lookup(fsa_membership_copy->members, fsa_our_uname); your_node = (oc_node_t*) g_hash_table_lookup(fsa_membership_copy->members, vote_from); if(is_set(fsa_input_register, R_SHUTDOWN)) { crm_debug("Election fail: we are shutting down"); we_loose = TRUE; } else if(our_node == NULL) { crm_debug("Election fail: we dont exist in the CCM list"); we_loose = TRUE; } else if(your_node == NULL) { crm_err("The other side doesnt exist in the CCM list"); } else if(compare_version(your_version, CRM_VERSION) > 0) { crm_debug("Election fail: version"); we_loose = TRUE; } else if(your_node->node_born_on < our_node->node_born_on) { crm_debug("Election fail: born_on"); we_loose = TRUE; } else if(your_node->node_born_on == our_node->node_born_on && strcmp(fsa_our_uname, vote_from) > 0) { crm_debug("Election fail: uname"); we_loose = TRUE; } else { election_data.winning_uname = NULL; election_data.winning_bornon = -1; /* maximum integer */ crm_trace("We might win... we should vote (possibly again)"); election_result = I_ELECTION; /* new "default" */ } if(we_loose) { if(fsa_input_register & R_THE_DC) { crm_debug("Give up the DC"); election_result = I_RELEASE_DC; } else { crm_debug("We werent the DC anyway"); election_result = I_PENDING; } } return election_result; } /* A_ELECT_TIMER_START, A_ELECTION_TIMEOUT */ /* we won */ enum crmd_fsa_input do_election_timer_ctrl(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) { return I_NULL; } /* A_DC_TAKEOVER */ enum crmd_fsa_input do_dc_takeover(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_trace("################## Taking over the DC ##################"); set_bit_inplace(fsa_input_register, R_THE_DC); crm_verbose("Am I the DC? %s", AM_I_DC?XML_BOOLEAN_YES:XML_BOOLEAN_NO); crm_free(fsa_our_dc); fsa_our_dc = crm_strdup(fsa_our_uname); /* Async get client status information in the cluster */ fsa_cluster_conn->llc_ops->client_status( fsa_cluster_conn, NULL, CRM_SYSTEM_CRMD, -1); set_bit_inplace(fsa_input_register, R_JOIN_OK); set_bit_inplace(fsa_input_register, R_INVOKE_PE); clear_bit_inplace(fsa_input_register, R_CIB_DONE); clear_bit_inplace(fsa_input_register, R_HAVE_CIB); startTimer(dc_heartbeat); return I_NULL; } /* A_DC_RELEASE */ enum crmd_fsa_input do_dc_release(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) { enum crmd_fsa_input result = I_NULL; crm_trace("################## Releasing the DC ##################"); stopTimer(dc_heartbeat); - if (fsa_cluster_conn->llc_ops->set_cstatus_callback( - fsa_cluster_conn, NULL, NULL)!=HA_OK){ - crm_err("Cannot unset client status callback\n"); - crm_err("REASON: %s\n", - fsa_cluster_conn->llc_ops->errmsg(fsa_cluster_conn)); - result = I_ERROR; - } - if(action & A_DC_RELEASE) { clear_bit_inplace(fsa_input_register, R_THE_DC); /* get a new CIB from the new DC */ clear_bit_inplace(fsa_input_register, R_HAVE_CIB); } else if (action & A_DC_RELEASED) { if(cur_state == S_STOPPING) { result = I_SHUTDOWN; /* necessary? */ result = I_RELEASE_SUCCESS; } #if 0 else if( are there errors ) { /* we cant stay up if not healthy */ /* or perhaps I_ERROR and go to S_RECOVER? */ result = I_SHUTDOWN; } #endif else result = I_RELEASE_SUCCESS; } else { crm_err("Warning, do_dc_release invoked for action %s", fsa_action2string(action)); } crm_verbose("Am I still the DC? %s", AM_I_DC?XML_BOOLEAN_YES:XML_BOOLEAN_NO); return result; } void ghash_count_vote(gpointer key, gpointer value, gpointer user_data) { struct election_data_s *election_data = (struct election_data_s *)user_data; oc_node_t *cur_node = (oc_node_t*)value; const char *node_uname = (const char*)key; if(election_data->winning_bornon > cur_node->node_born_on) { election_data->winning_uname = node_uname; election_data->winning_bornon = cur_node->node_born_on; } else if(election_data->winning_bornon == cur_node->node_born_on && (election_data->winning_uname == NULL || strcmp(election_data->winning_uname, node_uname) > 0)) { election_data->winning_uname = node_uname; election_data->winning_bornon = cur_node->node_born_on; } }