static int
crm_compare_age(struct timeval your_age)
{
struct timeval our_age;
if (crm_uptime(&our_age) < 0) {
return -1;
}
/* We want these times to be "significantly" different */
if (our_age.tv_sec > your_age.tv_sec) {
crm_debug("Win: %ld vs %ld (seconds)", (long)our_age.tv_sec, (long)your_age.tv_sec);
return 1;
} else if (our_age.tv_sec < your_age.tv_sec) {
crm_debug("Loose: %ld vs %ld (seconds)", (long)our_age.tv_sec, (long)your_age.tv_sec);
return -1;
} else if (our_age.tv_usec > your_age.tv_usec) {
crm_debug("Win: %ld vs %ld (usec)", (long)our_age.tv_usec, (long)your_age.tv_usec);
return 1;
} else if (our_age.tv_usec < your_age.tv_usec) {
crm_debug("Loose: %ld vs %ld (usec)", (long)our_age.tv_usec, (long)your_age.tv_usec);
return -1;
}
return 0;
}
static int
crm_compare_age(struct timeval your_age)
{
struct timeval our_age;
crm_uptime(&our_age); /* If an error occurred, our_age will be compared as {0,0} */
if (our_age.tv_sec > your_age.tv_sec) {
crm_debug("Win: %ld vs %ld (seconds)", (long)our_age.tv_sec, (long)your_age.tv_sec);
return 1;
} else if (our_age.tv_sec < your_age.tv_sec) {
crm_debug("Loose: %ld vs %ld (seconds)", (long)our_age.tv_sec, (long)your_age.tv_sec);
return -1;
} else if (our_age.tv_usec > your_age.tv_usec) {
crm_debug("Win: %ld.%ld vs %ld.%ld (usec)",
(long)our_age.tv_sec, (long)our_age.tv_usec, (long)your_age.tv_sec, (long)your_age.tv_usec);
return 1;
} else if (our_age.tv_usec < your_age.tv_usec) {
crm_debug("Loose: %ld.%ld vs %ld.%ld (usec)",
(long)our_age.tv_sec, (long)our_age.tv_usec, (long)your_age.tv_sec, (long)your_age.tv_usec);
return -1;
}
return 0;
}
/* ELECTION投票処理 */
void
election_vote(election_t *e)
{
struct timeval age;
xmlNode *vote = NULL;
crm_node_t *our_node;
if(e == NULL) {
crm_trace("Not voting in election: not initialized");
return;
}
our_node = crm_get_peer(0, e->uname);
if (our_node == NULL || crm_is_peer_active(our_node) == FALSE) {
crm_trace("Cannot vote yet: %p", our_node);
return;
}
/* 自ノードの情報を生成する */
e->state = election_in_progress;
/* CRM_OP_VOTE(F_ATTRD_TASKフィールド)メッセージを生成する */
vote = create_request(CRM_OP_VOTE, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);
e->count++;
crm_xml_add(vote, F_CRM_ELECTION_OWNER, our_node->uuid);
crm_xml_add_int(vote, F_CRM_ELECTION_ID, e->count);
crm_uptime(&age);
crm_xml_add_int(vote, F_CRM_ELECTION_AGE_S, age.tv_sec);
crm_xml_add_int(vote, F_CRM_ELECTION_AGE_US, age.tv_usec);
/* クラスタに投票メッセージを送信する */
send_cluster_message(NULL, crm_msg_crmd, vote, TRUE);
free_xml(vote);
crm_debug("Started election %d", e->count);
if (e->voted) {
g_hash_table_destroy(e->voted);
e->voted = NULL;
}
/* ELECTIONのタイマーを開始する */
election_timeout_start(e);
return;
}
/*!
* \brief Start a new election by offering local node's candidacy
*
* Broadcast a "vote" election message containing the local node's ID,
* (incremented) election counter, and uptime, and start the election timer.
*
* \param[in] e Election object
* \note Any nodes agreeing to the candidacy will send a "no-vote" reply, and if
* all active peers do so, or if the election times out, the local node
* wins the election. (If we lose to any peer vote, we will stop the
* timer, so a timeout means we did not lose -- either some peer did not
* vote, or we did not call election_check() in time.)
*/
void
election_vote(election_t *e)
{
struct timeval age;
xmlNode *vote = NULL;
crm_node_t *our_node;
if (e == NULL) {
crm_trace("Election vote requested, but no election available");
return;
}
our_node = crm_get_peer(0, e->uname);
if ((our_node == NULL) || (crm_is_peer_active(our_node) == FALSE)) {
crm_trace("Cannot vote in %s yet: local node not connected to cluster",
e->name);
return;
}
election_reset(e);
e->state = election_in_progress;
vote = create_request(CRM_OP_VOTE, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);
e->count++;
crm_xml_add(vote, F_CRM_ELECTION_OWNER, our_node->uuid);
crm_xml_add_int(vote, F_CRM_ELECTION_ID, e->count);
crm_uptime(&age);
crm_xml_add_int(vote, F_CRM_ELECTION_AGE_S, age.tv_sec);
crm_xml_add_int(vote, F_CRM_ELECTION_AGE_US, age.tv_usec);
send_cluster_message(NULL, crm_msg_crmd, vote, TRUE);
free_xml(vote);
crm_debug("Started %s round %d", e->name, e->count);
election_timeout_start(e);
return;
}
/* A_ELECTION_VOTE */
void
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)
{
struct timeval age;
xmlNode *vote = NULL;
gboolean not_voting = FALSE;
/* don't vote if we're in one of these states or wanting to shut down */
switch (cur_state) {
case S_STARTING:
case S_RECOVERY:
case S_STOPPING:
case S_TERMINATE:
crm_warn("Not voting in election, we're in state %s", fsa_state2string(cur_state));
not_voting = TRUE;
break;
default:
break;
}
if (not_voting == FALSE) {
if (is_set(fsa_input_register, R_STARTING)) {
not_voting = TRUE;
}
}
if (not_voting) {
if (AM_I_DC) {
register_fsa_input(C_FSA_INTERNAL, I_RELEASE_DC, NULL);
} else {
register_fsa_input(C_FSA_INTERNAL, I_PENDING, NULL);
}
return;
}
vote = create_request(CRM_OP_VOTE, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL);
current_election_id++;
crm_xml_add(vote, F_CRM_ELECTION_OWNER, fsa_our_uuid);
crm_xml_add_int(vote, F_CRM_ELECTION_ID, current_election_id);
crm_uptime(&age);
crm_xml_add_int(vote, F_CRM_ELECTION_AGE_S, age.tv_sec);
crm_xml_add_int(vote, F_CRM_ELECTION_AGE_US, age.tv_usec);
send_cluster_message(NULL, crm_msg_crmd, vote, TRUE);
free_xml(vote);
crm_debug("Started election %d", current_election_id);
if (voted) {
g_hash_table_destroy(voted);
}
voted = NULL;
if (cur_state == S_ELECTION || cur_state == S_RELEASE_DC) {
crm_timer_start(election_timeout);
} else if (cur_state != S_INTEGRATION) {
crm_err("Broken? Voting in state %s", fsa_state2string(cur_state));
}
return;
}