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/*
* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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 library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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>
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <sys/param.h>
#include <sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <glib.h>
#include <crm/common/ipc.h>
#include <crm/cluster/internal.h>
#include <crm/msg_xml.h>
#include <crm/stonith-ng.h>
GHashTable *crm_peer_cache = NULL;
unsigned long long crm_peer_seq = 0;
gboolean crm_have_quorum = FALSE;
gboolean
crm_is_peer_active(const crm_node_t * node)
{
if(node == NULL) {
return FALSE;
}
#if SUPPORT_COROSYNC
if (is_openais_cluster()) {
return crm_is_corosync_peer_active(node);
}
#endif
#if SUPPORT_HEARTBEAT
if (is_heartbeat_cluster()) {
return crm_is_heartbeat_peer_active(node);
}
#endif
crm_err("Unhandled cluster type: %s", name_for_cluster_type(get_cluster_type()));
return FALSE;
}
static gboolean
crm_reap_dead_member(gpointer key, gpointer value, gpointer user_data)
{
crm_node_t *node = value;
crm_node_t *search = user_data;
if (search == NULL) {
return FALSE;
} else if (search->id && node->id != search->id) {
return FALSE;
} else if (search->id == 0 && safe_str_neq(node->uname, search->uname)) {
return FALSE;
} else if (crm_is_peer_active(value) == FALSE) {
crm_notice("Removing %s/%u from the membership list", node->uname, node->id);
return TRUE;
}
return FALSE;
}
guint
reap_crm_member(uint32_t id, const char *name)
{
int matches = 0;
crm_node_t search;
if (crm_peer_cache == NULL) {
crm_trace("Nothing to do, cache not initialized");
return 0;
}
search.id = id;
search.uname = strdup(name);
matches = g_hash_table_foreach_remove(crm_peer_cache, crm_reap_dead_member, &search);
if(matches) {
crm_notice("Purged %d peers with id=%u and/or uname=%s from the membership cache", matches, id, name);
} else {
crm_info("No peers with id=%u and/or uname=%s exist", id, name);
}
free(search.uname);
return matches;
}
static void
crm_count_peer(gpointer key, gpointer value, gpointer user_data)
{
guint *count = user_data;
crm_node_t *node = value;
if (crm_is_peer_active(node)) {
*count = *count + 1;
}
}
guint
crm_active_peers(void)
{
guint count = 0;
if (crm_peer_cache) {
g_hash_table_foreach(crm_peer_cache, crm_count_peer, &count);
}
return count;
}
void
destroy_crm_node(gpointer data)
{
crm_node_t *node = data;
crm_trace("Destroying entry for node %u", node->id);
free(node->addr);
free(node->uname);
free(node->state);
free(node->uuid);
free(node->expected);
free(node);
}
void
crm_peer_init(void)
{
static gboolean initialized = FALSE;
if (initialized) {
return;
}
initialized = TRUE;
crm_peer_destroy();
if (crm_peer_cache == NULL) {
crm_peer_cache = g_hash_table_new_full(crm_str_hash, g_str_equal, free, destroy_crm_node);
}
}
void
crm_peer_destroy(void)
{
if (crm_peer_cache != NULL) {
crm_trace("Destroying peer cache with %d members", g_hash_table_size(crm_peer_cache));
g_hash_table_destroy(crm_peer_cache);
crm_peer_cache = NULL;
}
}
void (*crm_status_callback) (enum crm_status_type, crm_node_t *, const void *) = NULL;
void
crm_set_status_callback(void (*dispatch) (enum crm_status_type, crm_node_t *, const void *))
{
crm_status_callback = dispatch;
}
/* coverity[-alloc] Memory is referenced in one or both hashtables */
crm_node_t *
crm_get_peer(unsigned int id, const char *uname)
{
GHashTableIter iter;
crm_node_t *node = NULL;
crm_node_t *by_id = NULL;
crm_node_t *by_name = NULL;
CRM_ASSERT(id > 0 || uname != NULL);
crm_peer_init();
if (uname != NULL) {
g_hash_table_iter_init(&iter, crm_peer_cache);
while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) {
if(node->uname && strcasecmp(node->uname, uname) == 0) {
crm_trace("Name match: %s", node->uname);
by_name = node;
break;
}
}
}
if (id > 0) {
g_hash_table_iter_init(&iter, crm_peer_cache);
while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) {
if(node->id == id) {
crm_trace("ID match: %u", node->id);
by_id = node;
break;
}
}
}
node = by_id; /* Good default */
if(by_id == by_name) {
/* Nothing to do if they match (both NULL counts) */
crm_trace("Consistent: %p for %u/%s", by_id, id, uname);
} else if(by_name) {
crm_trace("Only one: %p for %u/%s", by_name, id, uname);
if(id && by_name->id) {
crm_crit("Node %u and %u share the same name '%s'",
id, by_name->id, uname);
node = NULL; /* Create a new one */
} else {
node = by_name;
}
} else if(by_id) {
crm_trace("Only one: %p for %u/%s", by_id, id, uname);
if(uname && by_id->uname) {
crm_crit("Node '%s' and '%s' share the same cluster nodeid %u: assuming '%s' is correct",
uname, by_id->uname, id, uname);
}
} else if(uname && by_id->uname) {
crm_warn("Node '%s' and '%s' share the same cluster nodeid: %u", by_id->uname, by_name->uname, id);
} else if(id && by_name->id) {
crm_warn("Node %u and %u share the same name: '%s'", by_id->id, by_name->id, uname);
} else {
/* Simple merge */
/* Only corosync based clusters use nodeid's
* The functions that call crm_update_peer_state() only know nodeid so 'by_id' is authorative when merging
* Same for crm_update_peer_proc()
*/
crm_info("Merging %p into %p", by_name, by_id);
g_hash_table_remove(crm_peer_cache, by_name);
}
if (node == NULL) {
char *uniqueid = crm_generate_uuid();
node = calloc(1, sizeof(crm_node_t));
CRM_ASSERT(node);
crm_info("Created entry %s/%p for node %s/%u (%d total)",
uniqueid, node, uname, id, 1 + g_hash_table_size(crm_peer_cache));
g_hash_table_replace(crm_peer_cache, uniqueid, node);
}
if(id > 0 && uname && (node->id == 0 || node->uname == NULL)) {
crm_info("Node %u is now known as %s", id, uname);
}
if(id > 0 && node->id == 0) {
node->id = id;
}
if(uname && node->uname == NULL) {
node->uname = strdup(uname);
if (crm_status_callback) {
crm_status_callback(crm_status_uname, node, NULL);
}
}
if(node->uuid == NULL) {
const char *uuid = crm_peer_uuid(node);
if (uuid) {
crm_info("Node %u has uuid %s", id, uuid);
} else {
crm_info("Cannot obtain a UUID for node %d/%s", id, node->uname);
}
}
return node;
}
crm_node_t *
crm_update_peer(const char *source, unsigned int id, uint64_t born, uint64_t seen, int32_t votes,
uint32_t children, const char *uuid, const char *uname, const char *addr,
const char *state)
{
#if SUPPORT_PLUGIN
gboolean addr_changed = FALSE;
gboolean votes_changed = FALSE;
#endif
crm_node_t *node = NULL;
id = get_corosync_id(id, uuid);
node = crm_get_peer(id, uname);
CRM_ASSERT(node != NULL);
if (node->uuid == NULL) {
if (is_openais_cluster()) {
/* Yes, overrule whatever was passed in */
crm_peer_uuid(node);
} else if (uuid != NULL) {
node->uuid = strdup(uuid);
}
}
if (children > 0) {
crm_update_peer_proc(source, node, children, state);
}
if (state != NULL) {
crm_update_peer_state(source, node, state, seen);
}
#if SUPPORT_HEARTBEAT
if (born != 0) {
node->born = born;
}
#endif
#if SUPPORT_PLUGIN
/* These were only used by the plugin */
if (born != 0) {
node->born = born;
}
if (votes > 0 && node->votes != votes) {
votes_changed = TRUE;
node->votes = votes;
}
if (addr != NULL) {
if (node->addr == NULL || crm_str_eq(node->addr, addr, FALSE) == FALSE) {
addr_changed = TRUE;
free(node->addr);
node->addr = strdup(addr);
}
}
if (addr_changed || votes_changed) {
crm_info("%s: Node %s: id=%u state=%s addr=%s%s votes=%d%s born=" U64T " seen=" U64T
" proc=%.32x", source, node->uname, node->id, node->state,
node->addr, addr_changed ? " (new)" : "", node->votes,
votes_changed ? " (new)" : "", node->born, node->last_seen, node->processes);
}
#endif
return node;
}
void
crm_update_peer_proc(const char *source, crm_node_t * node, uint32_t flag, const char *status)
{
uint32_t last = 0;
gboolean changed = FALSE;
CRM_CHECK(node != NULL, crm_err("%s: Could not set %s to %s for NULL",
source, peer2text(flag), status); return);
last = node->processes;
if (status == NULL) {
node->processes = flag;
if (node->processes != last) {
changed = TRUE;
}
} else if (safe_str_eq(status, ONLINESTATUS)) {
if ((node->processes & flag) == 0) {
set_bit(node->processes, flag);
changed = TRUE;
}
#if SUPPORT_PLUGIN
} else if (safe_str_eq(status, CRM_NODE_MEMBER)) {
if (flag > 0 && node->processes != flag) {
node->processes = flag;
changed = TRUE;
}
#endif
} else if (node->processes & flag) {
clear_bit(node->processes, flag);
changed = TRUE;
}
if (changed) {
if (status == NULL && flag <= crm_proc_none) {
crm_info("%s: Node %s[%u] - all processes are now offline", source, node->uname,
node->id);
} else {
crm_info("%s: Node %s[%u] - %s is now %s", source, node->uname, node->id,
peer2text(flag), status);
}
if (crm_status_callback) {
crm_status_callback(crm_status_processes, node, &last);
}
} else {
crm_trace("%s: Node %s[%u] - %s is unchanged (%s)", source, node->uname, node->id,
peer2text(flag), status);
}
}
void
crm_update_peer_expected(const char *source, crm_node_t * node, const char *expected)
{
char *last = NULL;
gboolean changed = FALSE;
CRM_CHECK(node != NULL, crm_err("%s: Could not set 'expected' to %s", source, expected);
return);
last = node->expected;
if (expected != NULL && safe_str_neq(node->expected, expected)) {
node->expected = strdup(expected);
changed = TRUE;
}
if (changed) {
crm_info("%s: Node %s[%u] - expected state is now %s", source, node->uname, node->id,
expected);
free(last);
} else {
crm_trace("%s: Node %s[%u] - expected state is unchanged (%s)", source, node->uname,
node->id, expected);
}
}
void
crm_update_peer_state(const char *source, crm_node_t * node, const char *state, int membership)
{
char *last = NULL;
gboolean changed = FALSE;
CRM_CHECK(node != NULL, crm_err("%s: Could not set 'state' to %s", source, state);
return);
last = node->state;
if (state != NULL && safe_str_neq(node->state, state)) {
node->state = strdup(state);
changed = TRUE;
}
if (membership != 0 && safe_str_eq(node->state, CRM_NODE_MEMBER)) {
node->last_seen = membership;
}
if (changed) {
crm_notice("%s: Node %s[%u] - state is now %s (was %s)", source, node->uname, node->id, state, last);
if (crm_status_callback) {
crm_status_callback(crm_status_nstate, node, last);
}
free(last);
} else {
crm_trace("%s: Node %s[%u] - state is unchanged (%s)", source, node->uname, node->id,
state);
}
}
int
crm_terminate_member(int nodeid, const char *uname, void *unused)
{
/* Always use the synchronous, non-mainloop version */
return stonith_api_kick(nodeid, uname, 120, TRUE);
}
int
crm_terminate_member_no_mainloop(int nodeid, const char *uname, int *connection)
{
return stonith_api_kick(nodeid, uname, 120, TRUE);
}

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