diff --git a/crmd/join_dc.c b/crmd/join_dc.c
index 9126626a6e..4883575bdf 100644
--- a/crmd/join_dc.c
+++ b/crmd/join_dc.c
@@ -1,662 +1,668 @@
/*
* 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 <crm/crm.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crm/cluster.h>
#include <crmd_fsa.h>
#include <crmd_messages.h>
#include "tengine.h"
char *max_epoch = NULL;
char *max_generation_from = NULL;
xmlNode *max_generation_xml = NULL;
void initialize_join(gboolean before);
void finalize_join_for(gpointer key, gpointer value, gpointer user_data);
void finalize_sync_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data);
gboolean check_join_state(enum crmd_fsa_state cur_state, const char *source);
static int current_join_id = 0;
unsigned long long saved_ccm_membership_id = 0;
void
initialize_join(gboolean before)
{
GHashTableIter iter;
crm_node_t *peer = NULL;
char *key = NULL;
/* clear out/reset a bunch of stuff */
crm_debug("join-%d: Initializing join data (flag=%s)",
current_join_id, before ? "true" : "false");
g_hash_table_iter_init(&iter, crm_peer_cache);
while (g_hash_table_iter_next(&iter, (gpointer *) & key, (gpointer *) &peer)) {
crm_update_peer_join(__FUNCTION__, peer, crm_join_none);
}
if (before) {
if (max_generation_from != NULL) {
free(max_generation_from);
max_generation_from = NULL;
}
if (max_generation_xml != NULL) {
free_xml(max_generation_xml);
max_generation_xml = NULL;
}
clear_bit(fsa_input_register, R_HAVE_CIB);
clear_bit(fsa_input_register, R_CIB_ASKED);
}
}
void
erase_node_from_join(const char *uname)
{
if (uname != NULL) {
crm_node_t *peer = crm_get_peer(0, uname);
crm_update_peer_join(__FUNCTION__, peer, crm_join_none);
}
}
static void
join_make_offer(gpointer key, gpointer value, gpointer user_data)
{
const char *join_to = NULL;
const crm_node_t *member = value;
CRM_ASSERT(member != NULL);
if (crm_is_peer_active(member) == FALSE) {
crm_trace("Not making an offer to %s: not active", member->uname);
return;
}
join_to = member->uname;
if (join_to == NULL) {
crm_err("No recipient for welcome message");
return;
}
if (saved_ccm_membership_id != crm_peer_seq) {
saved_ccm_membership_id = crm_peer_seq;
crm_info("Making join offers based on membership %llu", crm_peer_seq);
}
if(user_data && member->join > crm_join_none) {
crm_info("Skipping %s: already known %d", member->uname, member->join);
return;
}
erase_node_from_join(join_to);
if (crm_is_peer_active(member)) {
crm_node_t *peer = crm_get_peer(0, join_to);
xmlNode *offer = create_request(CRM_OP_JOIN_OFFER, NULL, join_to,
CRM_SYSTEM_CRMD, CRM_SYSTEM_DC, NULL);
crm_xml_add_int(offer, F_CRM_JOIN_ID, current_join_id);
/* send the welcome */
crm_info("join-%d: Sending offer to %s", current_join_id, join_to);
send_cluster_message(peer, crm_msg_crmd, offer, TRUE);
free_xml(offer);
crm_update_peer_join(__FUNCTION__, peer, crm_join_welcomed);
/* crm_update_peer_expected(__FUNCTION__, member, CRMD_JOINSTATE_PENDING); */
} else {
crm_info("Peer process on %s is not active (yet?): %.8lx %d",
join_to, (long)member->processes, g_hash_table_size(crm_peer_cache));
}
}
/* A_DC_JOIN_OFFER_ALL */
void
do_dc_join_offer_all(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)
{
/* reset everyones status back to down or in_ccm in the CIB
*
* any nodes that are active in the CIB but not in the CCM list
* will be seen as offline by the PE anyway
*/
current_join_id++;
initialize_join(TRUE);
/* do_update_cib_nodes(TRUE, __FUNCTION__); */
update_dc(NULL);
if (cause == C_HA_MESSAGE && current_input == I_NODE_JOIN) {
crm_info("A new node joined the cluster");
}
g_hash_table_foreach(crm_peer_cache, join_make_offer, NULL);
/* dont waste time by invoking the PE yet; */
crm_info("join-%d: Waiting on %d outstanding join acks",
current_join_id, crmd_join_phase_count(crm_join_welcomed));
}
/* A_DC_JOIN_OFFER_ONE */
void
do_dc_join_offer_one(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_node_t *member;
ha_msg_input_t *welcome = NULL;
const char *op = NULL;
const char *join_to = NULL;
if (msg_data->data) {
welcome = fsa_typed_data(fsa_dt_ha_msg);
} else {
crm_info("An unknown node joined - (re-)offer to any unconfirmed nodes");
g_hash_table_foreach(crm_peer_cache, join_make_offer, &member);
check_join_state(cur_state, __FUNCTION__);
return;
}
if (welcome == NULL) {
crm_err("Attempt to send welcome message without a message to reply to!");
return;
}
join_to = crm_element_value(welcome->msg, F_CRM_HOST_FROM);
if (join_to == NULL) {
crm_err("Attempt to send welcome message without a host to reply to!");
return;
}
member = crm_get_peer(0, join_to);
op = crm_element_value(welcome->msg, F_CRM_TASK);
if (join_to != NULL && (cur_state == S_INTEGRATION || cur_state == S_FINALIZE_JOIN)) {
/* note: it _is_ possible that a node will have been
* sick or starting up when the original offer was made.
* however, it will either re-announce itself in due course
* _or_ we can re-store the original offer on the client.
*/
crm_trace("(Re-)offering membership to %s...", join_to);
}
crm_info("join-%d: Processing %s request from %s in state %s",
current_join_id, op, join_to, fsa_state2string(cur_state));
erase_node_from_join(join_to);
join_make_offer(NULL, member, NULL);
/* always offer to the DC (ourselves)
* this ensures the correct value for max_generation_from
*/
member = crm_get_peer(0, fsa_our_uname);
join_make_offer(NULL, member, NULL);
/* this was a genuine join request, cancel any existing
* transition and invoke the PE
*/
abort_transition(INFINITY, tg_restart, "Node join", NULL);
/* dont waste time by invoking the pe yet; */
crm_debug("Waiting on %d outstanding join acks for join-%d",
crmd_join_phase_count(crm_join_welcomed), current_join_id);
}
static int
compare_int_fields(xmlNode * left, xmlNode * right, const char *field)
{
const char *elem_l = crm_element_value(left, field);
const char *elem_r = crm_element_value(right, field);
int int_elem_l = crm_int_helper(elem_l, NULL);
int int_elem_r = crm_int_helper(elem_r, NULL);
if (int_elem_l < int_elem_r) {
return -1;
} else if (int_elem_l > int_elem_r) {
return 1;
}
return 0;
}
/* A_DC_JOIN_PROCESS_REQ */
void
do_dc_join_filter_offer(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)
{
xmlNode *generation = NULL;
int cmp = 0;
int join_id = -1;
gboolean ack_nack_bool = TRUE;
const char *ack_nack = CRMD_JOINSTATE_MEMBER;
ha_msg_input_t *join_ack = fsa_typed_data(fsa_dt_ha_msg);
const char *join_from = crm_element_value(join_ack->msg, F_CRM_HOST_FROM);
const char *ref = crm_element_value(join_ack->msg, F_CRM_REFERENCE);
crm_node_t *join_node = crm_get_peer(0, join_from);
crm_debug("Processing req from %s", join_from);
generation = join_ack->xml;
crm_element_value_int(join_ack->msg, F_CRM_JOIN_ID, &join_id);
if (max_generation_xml != NULL && generation != NULL) {
int lpc = 0;
const char *attributes[] = {
XML_ATTR_GENERATION_ADMIN,
XML_ATTR_GENERATION,
XML_ATTR_NUMUPDATES,
};
for (lpc = 0; cmp == 0 && lpc < DIMOF(attributes); lpc++) {
cmp = compare_int_fields(max_generation_xml, generation, attributes[lpc]);
}
}
if (join_id != current_join_id) {
crm_debug("Invalid response from %s: join-%d vs. join-%d",
join_from, join_id, current_join_id);
check_join_state(cur_state, __FUNCTION__);
return;
} else if (join_node == NULL || crm_is_peer_active(join_node) == FALSE) {
crm_err("Node %s is not a member", join_from);
ack_nack_bool = FALSE;
} else if (generation == NULL) {
crm_err("Generation was NULL");
ack_nack_bool = FALSE;
} else if (max_generation_xml == NULL) {
max_generation_xml = copy_xml(generation);
max_generation_from = strdup(join_from);
} else if (cmp < 0 || (cmp == 0 && safe_str_eq(join_from, fsa_our_uname))) {
crm_debug("%s has a better generation number than"
" the current max %s", join_from, max_generation_from);
if (max_generation_xml) {
crm_log_xml_debug(max_generation_xml, "Max generation");
}
crm_log_xml_debug(generation, "Their generation");
free(max_generation_from);
free_xml(max_generation_xml);
max_generation_from = strdup(join_from);
max_generation_xml = copy_xml(join_ack->xml);
}
if (ack_nack_bool == FALSE) {
/* NACK this client */
ack_nack = CRMD_JOINSTATE_NACK;
crm_update_peer_join(__FUNCTION__, join_node, crm_join_nack);
crm_err("join-%d: NACK'ing node %s (ref %s)", join_id, join_from, ref);
} else {
crm_debug("join-%d: Welcoming node %s (ref %s)", join_id, join_from, ref);
crm_update_peer_join(__FUNCTION__, join_node, crm_join_integrated);
}
crm_update_peer_expected(__FUNCTION__, join_node, ack_nack);
crm_debug("%u nodes have been integrated into join-%d",
crmd_join_phase_count(crm_join_integrated), join_id);
if (check_join_state(cur_state, __FUNCTION__) == FALSE) {
/* dont waste time by invoking the PE yet; */
crm_debug("join-%d: Still waiting on %d outstanding offers",
join_id, crmd_join_phase_count(crm_join_welcomed));
}
}
/* A_DC_JOIN_FINALIZE */
void
do_dc_join_finalize(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)
{
char *sync_from = NULL;
int rc = pcmk_ok;
/* This we can do straight away and avoid clients timing us out
* while we compute the latest CIB
*/
crm_debug("Finializing join-%d for %d clients",
current_join_id, crmd_join_phase_count(crm_join_integrated));
- if (crmd_join_phase_count(crm_join_integrated) == 0) {
- /* If we don't even have ourself, start again */
- crmd_join_phase_log(LOG_NOTICE);
- register_fsa_error_adv(C_FSA_INTERNAL, I_ELECTION_DC, NULL, NULL, __FUNCTION__);
+ crmd_join_phase_log(LOG_INFO);
+ if (crmd_join_phase_count(crm_join_welcomed) != 0) {
+ crm_info("Waiting for %d more nodes", crmd_join_phase_count(crm_join_welcomed));
+ /* crmd_fsa_stall(FALSE); Needed? */
+ return;
+
+ } else if (crmd_join_phase_count(crm_join_integrated) == 0) {
+ /* Nothing to do */
+ check_join_state(fsa_state, __FUNCTION__);
return;
}
clear_bit(fsa_input_register, R_HAVE_CIB);
if (max_generation_from == NULL || safe_str_eq(max_generation_from, fsa_our_uname)) {
set_bit(fsa_input_register, R_HAVE_CIB);
}
if (is_set(fsa_input_register, R_IN_TRANSITION)) {
crm_warn("join-%d: We are still in a transition."
" Delaying until the TE completes.", current_join_id);
crmd_fsa_stall(FALSE);
return;
}
if (is_set(fsa_input_register, R_HAVE_CIB) == FALSE) {
/* ask for the agreed best CIB */
sync_from = strdup(max_generation_from);
crm_log_xml_debug(max_generation_xml, "Requesting version");
set_bit(fsa_input_register, R_CIB_ASKED);
} else {
/* Send _our_ CIB out to everyone */
sync_from = strdup(fsa_our_uname);
}
crm_info("join-%d: Syncing the CIB from %s to the rest of the cluster",
current_join_id, sync_from);
rc = fsa_cib_conn->cmds->sync_from(fsa_cib_conn, sync_from, NULL, cib_quorum_override);
fsa_register_cib_callback(rc, FALSE, sync_from, finalize_sync_callback);
}
void
finalize_sync_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
{
CRM_LOG_ASSERT(-EPERM != rc);
clear_bit(fsa_input_register, R_CIB_ASKED);
if (rc != pcmk_ok) {
do_crm_log((rc == -pcmk_err_old_data ? LOG_WARNING : LOG_ERR),
"Sync from %s failed: %s", (char *)user_data, pcmk_strerror(rc));
/* restart the whole join process */
register_fsa_error_adv(C_FSA_INTERNAL, I_ELECTION_DC, NULL, NULL, __FUNCTION__);
} else if (AM_I_DC && fsa_state == S_FINALIZE_JOIN) {
set_bit(fsa_input_register, R_HAVE_CIB);
clear_bit(fsa_input_register, R_CIB_ASKED);
/* make sure dc_uuid is re-set to us */
if (check_join_state(fsa_state, __FUNCTION__) == FALSE) {
crm_debug("Notifying %d clients of join-%d results",
crmd_join_phase_count(crm_join_integrated), current_join_id);
g_hash_table_foreach(crm_peer_cache, finalize_join_for, NULL);
}
} else {
crm_debug("No longer the DC in S_FINALIZE_JOIN: %s/%s",
AM_I_DC ? "DC" : "CRMd", fsa_state2string(fsa_state));
}
free(user_data);
}
static void
join_update_complete_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
{
fsa_data_t *msg_data = NULL;
if (rc == pcmk_ok) {
crm_debug("Join update %d complete", call_id);
check_join_state(fsa_state, __FUNCTION__);
} else {
crm_err("Join update %d failed", call_id);
crm_log_xml_debug(msg, "failed");
register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL);
}
}
/* A_DC_JOIN_PROCESS_ACK */
void
do_dc_join_ack(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)
{
int join_id = -1;
int call_id = 0;
ha_msg_input_t *join_ack = fsa_typed_data(fsa_dt_ha_msg);
const char *op = crm_element_value(join_ack->msg, F_CRM_TASK);
const char *join_from = crm_element_value(join_ack->msg, F_CRM_HOST_FROM);
crm_node_t *peer = crm_get_peer(0, join_from);
if (safe_str_neq(op, CRM_OP_JOIN_CONFIRM) || peer == NULL) {
crm_debug("Ignoring op=%s message from %s", op, join_from);
return;
}
crm_trace("Processing ack from %s", join_from);
crm_element_value_int(join_ack->msg, F_CRM_JOIN_ID, &join_id);
if (peer->join != crm_join_finalized) {
crm_info("Join not in progress: ignoring join-%d from %s (phase = %d)",
join_id, join_from, peer->join);
return;
} else if (join_id != current_join_id) {
crm_err("Invalid response from %s: join-%d vs. join-%d",
join_from, join_id, current_join_id);
crm_update_peer_join(__FUNCTION__, peer, crm_join_nack);
return;
}
crm_update_peer_join(__FUNCTION__, peer, crm_join_confirmed);
crm_info("join-%d: Updating node state to %s for %s",
join_id, CRMD_JOINSTATE_MEMBER, join_from);
/* update CIB with the current LRM status from the node
* We dont need to notify the TE of these updates, a transition will
* be started in due time
*/
erase_status_tag(join_from, XML_CIB_TAG_LRM, cib_scope_local);
fsa_cib_update(XML_CIB_TAG_STATUS, join_ack->xml,
cib_scope_local | cib_quorum_override | cib_can_create, call_id, NULL);
fsa_register_cib_callback(call_id, FALSE, NULL, join_update_complete_callback);
crm_debug("join-%d: Registered callback for LRM update %d", join_id, call_id);
}
void
finalize_join_for(gpointer key, gpointer value, gpointer user_data)
{
xmlNode *acknak = NULL;
xmlNode *tmp1 = NULL;
crm_node_t *join_node = value;
const char *join_to = join_node->uname;
if(join_node->join != crm_join_integrated) {
crm_trace("Skipping %s in state %d", join_to, join_node->join);
return;
}
/* make sure a node entry exists for the new node */
crm_trace("Creating node entry for %s", join_to);
tmp1 = create_xml_node(NULL, XML_CIB_TAG_NODE);
set_uuid(tmp1, XML_ATTR_UUID, join_to);
crm_xml_add(tmp1, XML_ATTR_UNAME, join_to);
fsa_cib_anon_update(XML_CIB_TAG_NODES, tmp1,
cib_scope_local | cib_quorum_override | cib_can_create);
free_xml(tmp1);
join_node = crm_get_peer(0, join_to);
if (crm_is_peer_active(join_node) == FALSE) {
/*
* NACK'ing nodes that the membership layer doesn't know about yet
* simply creates more churn
*
* Better to leave them waiting and let the join restart when
* the new membership event comes in
*
* All other NACKs (due to versions etc) should still be processed
*/
crm_update_peer_expected(__FUNCTION__, join_node, CRMD_JOINSTATE_PENDING);
return;
}
/* send the ack/nack to the node */
acknak = create_request(CRM_OP_JOIN_ACKNAK, NULL, join_to,
CRM_SYSTEM_CRMD, CRM_SYSTEM_DC, NULL);
crm_xml_add_int(acknak, F_CRM_JOIN_ID, current_join_id);
crm_debug("join-%d: ACK'ing join request from %s",
current_join_id, join_to);
crm_xml_add(acknak, CRM_OP_JOIN_ACKNAK, XML_BOOLEAN_TRUE);
crm_update_peer_join(__FUNCTION__, join_node, crm_join_finalized);
crm_update_peer_expected(__FUNCTION__, join_node, CRMD_JOINSTATE_MEMBER);
send_cluster_message(crm_get_peer(0, join_to), crm_msg_crmd, acknak, TRUE);
free_xml(acknak);
return;
}
void ghash_print_node(gpointer key, gpointer value, gpointer user_data);
gboolean
check_join_state(enum crmd_fsa_state cur_state, const char *source)
{
static unsigned long long highest_seq = 0;
crm_debug("Invoked by %s in state: %s", source, fsa_state2string(cur_state));
if (saved_ccm_membership_id != crm_peer_seq) {
crm_debug("%s: Membership changed since join started: %llu -> %llu (%llu)",
source, saved_ccm_membership_id, crm_peer_seq, highest_seq);
if(highest_seq < crm_peer_seq) {
/* Don't spam the FSA with duplicates */
highest_seq = crm_peer_seq;
register_fsa_input_before(C_FSA_INTERNAL, I_NODE_JOIN, NULL);
}
} else if (cur_state == S_INTEGRATION) {
if (crmd_join_phase_count(crm_join_welcomed) == 0) {
crm_debug("join-%d: Integration of %d peers complete: %s",
current_join_id, crmd_join_phase_count(crm_join_integrated), source);
register_fsa_input_before(C_FSA_INTERNAL, I_INTEGRATED, NULL);
return TRUE;
}
} else if (cur_state == S_FINALIZE_JOIN) {
if (is_set(fsa_input_register, R_HAVE_CIB) == FALSE) {
crm_debug("join-%d: Delaying I_FINALIZED until we have the CIB", current_join_id);
return TRUE;
} else if (crmd_join_phase_count(crm_join_welcomed) != 0) {
crm_debug("join-%d: Still waiting on %d welcomed nodes",
current_join_id, crmd_join_phase_count(crm_join_welcomed));
crmd_join_phase_log(LOG_DEBUG);
} else if (crmd_join_phase_count(crm_join_integrated) != 0) {
crm_debug("join-%d: Still waiting on %d integrated nodes",
current_join_id, crmd_join_phase_count(crm_join_integrated));
crmd_join_phase_log(LOG_DEBUG);
} else if (crmd_join_phase_count(crm_join_finalized) != 0) {
crm_debug("join-%d: Still waiting on %d finalized nodes",
current_join_id, crmd_join_phase_count(crm_join_finalized));
crmd_join_phase_log(LOG_DEBUG);
} else {
crm_debug("join-%d complete: %s", current_join_id, source);
register_fsa_input_later(C_FSA_INTERNAL, I_FINALIZED, NULL);
+ return TRUE;
}
}
return FALSE;
}
void
do_dc_join_final(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_debug("Ensuring DC, quorum and node attributes are up-to-date");
update_attrd(NULL, NULL, NULL, NULL);
crm_update_quorum(crm_have_quorum, TRUE);
}
int crmd_join_phase_count(enum crm_join_phase phase)
{
int count = 0;
const char *key;
crm_node_t *peer;
GHashTableIter iter;
g_hash_table_iter_init(&iter, crm_peer_cache);
while (g_hash_table_iter_next(&iter, (gpointer *) & key, (gpointer *) &peer)) {
if(peer->join == phase) {
count++;
}
}
return count;
}
void crmd_join_phase_log(int level)
{
const char *key;
crm_node_t *peer;
GHashTableIter iter;
g_hash_table_iter_init(&iter, crm_peer_cache);
while (g_hash_table_iter_next(&iter, (gpointer *) & key, (gpointer *) &peer)) {
const char *state = "unknown";
switch(peer->join) {
case crm_join_nack:
state = "nack";
break;
case crm_join_none:
state = "none";
break;
case crm_join_welcomed:
state = "welcomed";
break;
case crm_join_integrated:
state = "integrated";
break;
case crm_join_finalized:
state = "finalized";
break;
case crm_join_confirmed:
state = "confirmed";
break;
}
do_crm_log(level, "join-%d: %s=%s", current_join_id, peer->uname, state);
}
}