Page MenuHomeClusterLabs Projects
Files F7631684

callbacks.c
No OneTemporary
Actions

callbacks.c
View Options

/*
* 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 <sys/param.h>
#include <crm/crm.h>
#include <string.h>
#include <crmd_fsa.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <crm/common/msg.h>
#include <crm/common/cluster.h>
#include <crm/cib.h>
#include <crmd.h>
#include <crmd_messages.h>
#include <crmd_callbacks.h>
#include <crmd_lrm.h>
void crmd_ha_connection_destroy(gpointer user_data);
void crmd_ha_msg_filter(xmlNode *msg);
/* From join_dc... */
extern gboolean check_join_state(
enum crmd_fsa_state cur_state, const char *source);
#define trigger_fsa(source) crm_debug_3("Triggering FSA: %s", __FUNCTION__); \
mainloop_set_trigger(source);
#if SUPPORT_HEARTBEAT
gboolean
crmd_ha_msg_dispatch(ll_cluster_t *cluster_conn, gpointer user_data)
{
IPC_Channel *channel = NULL;
gboolean stay_connected = TRUE;
crm_debug_3("Invoked");
if(cluster_conn != NULL) {
channel = cluster_conn->llc_ops->ipcchan(cluster_conn);
}
CRM_CHECK(cluster_conn != NULL, ;);
CRM_CHECK(channel != NULL, ;);
if(channel != NULL && IPC_ISRCONN(channel)) {
if(cluster_conn->llc_ops->msgready(cluster_conn) == 0) {
crm_debug_2("no message ready yet");
}
/* invoke the callbacks but dont block */
cluster_conn->llc_ops->rcvmsg(cluster_conn, 0);
}
if (channel == NULL || channel->ch_status != IPC_CONNECT) {
if(is_set(fsa_input_register, R_HA_DISCONNECTED) == FALSE) {
crm_crit("Lost connection to heartbeat service.");
} else {
crm_info("Lost connection to heartbeat service.");
}
trigger_fsa(fsa_source);
stay_connected = FALSE;
}
return stay_connected;
}
#endif
void
crmd_ha_connection_destroy(gpointer user_data)
{
crm_debug_3("Invoked");
if(is_set(fsa_input_register, R_HA_DISCONNECTED)) {
/* we signed out, so this is expected */
crm_info("Heartbeat disconnection complete");
return;
}
crm_crit("Lost connection to heartbeat service!");
register_fsa_input(C_HA_DISCONNECT, I_ERROR, NULL);
trigger_fsa(fsa_source);
}
void
crmd_ha_msg_filter(xmlNode *msg)
{
if(AM_I_DC) {
const char *sys_from = crm_element_value(msg, F_CRM_SYS_FROM);
if(safe_str_eq(sys_from, CRM_SYSTEM_DC)) {
const char *from = crm_element_value(msg, F_ORIG);
if(safe_str_neq(from, fsa_our_uname)) {
int level = LOG_INFO;
const char *op = crm_element_value(msg, F_CRM_TASK);
/* make sure the election happens NOW */
if(fsa_state != S_ELECTION) {
ha_msg_input_t new_input;
level = LOG_ERR;
new_input.msg = msg;
register_fsa_error_adv(
C_FSA_INTERNAL, I_ELECTION, NULL, &new_input, __FUNCTION__);
}
do_crm_log(level, "Another DC detected: %s (op=%s)", from, op);
goto done;
}
}
} else {
const char *sys_to = crm_element_value(msg, F_CRM_SYS_TO);
if(safe_str_eq(sys_to, CRM_SYSTEM_DC)) {
return;
}
}
/* crm_log_xml(LOG_MSG, "HA[inbound]", msg); */
route_message(C_HA_MESSAGE, msg);
done:
trigger_fsa(fsa_source);
}
#if SUPPORT_HEARTBEAT
void
crmd_ha_msg_callback(HA_Message *hamsg, void* private_data)
{
int level = LOG_DEBUG;
crm_node_t *from_node = NULL;
xmlNode *msg = convert_ha_message(NULL, hamsg, __FUNCTION__);
const char *from = crm_element_value(msg, F_ORIG);
const char *op = crm_element_value(msg, F_CRM_TASK);
const char *sys_from = crm_element_value(msg, F_CRM_SYS_FROM);
CRM_CHECK(from != NULL, crm_log_xml_err(msg, "anon"); goto bail);
crm_debug_2("HA[inbound]: %s from %s", op, from);
if(crm_peer_cache == NULL || crm_active_members() == 0) {
crm_debug("Ignoring HA messages until we are"
" connected to the CCM (%s op from %s)", op, from);
crm_log_xml(LOG_MSG, "HA[inbound]: Ignore (No CCM)", msg);
goto bail;
}
from_node = crm_get_peer(0, from);
if(crm_is_member_active(from_node) == FALSE) {
if(safe_str_eq(op, CRM_OP_VOTE)) {
level = LOG_WARNING;
} else if(AM_I_DC && safe_str_eq(op, CRM_OP_JOIN_ANNOUNCE)) {
level = LOG_WARNING;
} else if(safe_str_eq(sys_from, CRM_SYSTEM_DC)) {
level = LOG_WARNING;
}
do_crm_log(level,
"Ignoring HA message (op=%s) from %s: not in our"
" membership list (size=%d)", op, from,
crm_active_members());
crm_log_xml(LOG_MSG, "HA[inbound]: CCM Discard", msg);
} else {
crmd_ha_msg_filter(msg);
}
bail:
free_xml(msg);
return;
}
#endif
/*
* Apparently returning TRUE means "stay connected, keep doing stuff".
* Returning FALSE means "we're all done, close the connection"
*/
gboolean
crmd_ipc_msg_callback(IPC_Channel *client, gpointer user_data)
{
int lpc = 0;
xmlNode *msg = NULL;
crmd_client_t *curr_client = (crmd_client_t*)user_data;
gboolean stay_connected = TRUE;
crm_debug_2("Invoked: %s",
curr_client->table_key);
while(IPC_ISRCONN(client)) {
if(client->ops->is_message_pending(client) == 0) {
break;
}
msg = xmlfromIPC(client, MAX_IPC_DELAY);
if (msg == NULL) {
break;
}
lpc++;
crm_debug_2("Processing msg from %s", curr_client->table_key);
crm_log_xml(LOG_DEBUG_2, "CRMd[inbound]", msg);
if(crmd_authorize_message(msg, curr_client)) {
route_message(C_IPC_MESSAGE, msg);
}
free_xml(msg);
msg = NULL;
if(client->ch_status != IPC_CONNECT) {
break;
}
}
crm_debug_2("Processed %d messages", lpc);
if (client->ch_status != IPC_CONNECT) {
stay_connected = FALSE;
process_client_disconnect(curr_client);
}
trigger_fsa(fsa_source);
return stay_connected;
}
extern GCHSource *lrm_source;
gboolean
lrm_dispatch(IPC_Channel *src_not_used, gpointer user_data)
{
/* ?? src == lrm_channel ?? */
ll_lrm_t *lrm = (ll_lrm_t*)user_data;
IPC_Channel *lrm_channel = lrm->lrm_ops->ipcchan(lrm);
lrm->lrm_ops->rcvmsg(lrm, FALSE);
if(lrm_channel->ch_status != IPC_CONNECT) {
lrm_connection_destroy(NULL);
return FALSE;
}
return TRUE;
}
extern gboolean process_lrm_event(lrm_op_t *op);
void
lrm_op_callback(lrm_op_t* op)
{
CRM_CHECK(op != NULL, return);
process_lrm_event(op);
}
void ais_status_callback(enum crm_status_type type, crm_node_t *node, const void *data)
{
gboolean reset_status_entry = FALSE;
if(AM_I_DC == FALSE || node->uname == NULL) {
return;
}
switch(type) {
case crm_status_uname:
crm_info("status: %s is now %s", node->uname, node->state);
/* reset_status_entry = TRUE; */
/* If we've never seen the node, then it also wont be in the status section */
break;
case crm_status_nstate:
crm_info("status: %s is now %s (was %s)", node->uname, node->state, (const char *)data);
reset_status_entry = TRUE;
break;
case crm_status_processes:
break;
}
/* Can this be removed now that do_cl_join_finalize_respond() does the same thing? */
if(reset_status_entry && safe_str_eq(CRMD_STATE_ACTIVE, node->state)) {
erase_status_tag(node->uname, XML_CIB_TAG_LRM);
erase_status_tag(node->uname, XML_TAG_TRANSIENT_NODEATTRS);
/* TODO: potentially we also want to set XML_CIB_ATTR_JOINSTATE and XML_CIB_ATTR_EXPSTATE here */
}
}
void
crmd_ha_status_callback(const char *node, const char *status, void *private)
{
xmlNode *update = NULL;
crm_node_t *member = NULL;
crm_notice("Status update: Node %s now has status [%s] (DC=%s)",
node, status, AM_I_DC?"true":"false");
member = crm_get_peer(0, node);
if(member == NULL || crm_is_member_active(member) == FALSE) {
/* Make sure it is created so crm_update_peer_proc() succeeds */
const char *uuid = get_uuid(node);
member = crm_update_peer(0, 0, 0, -1, 0, uuid, node, NULL, NULL);
}
if(safe_str_eq(status, PINGSTATUS)) {
return;
}
if(safe_str_eq(status, DEADSTATUS)) {
/* this node is toast */
crm_update_peer_proc(node, crm_proc_ais, OFFLINESTATUS);
if(AM_I_DC) {
update = create_node_state(
node, DEADSTATUS, XML_BOOLEAN_NO, OFFLINESTATUS,
CRMD_JOINSTATE_DOWN, NULL, TRUE, __FUNCTION__);
}
} else {
crm_update_peer_proc(node, crm_proc_ais, ONLINESTATUS);
if(AM_I_DC) {
update = create_node_state(
node, ACTIVESTATUS, NULL, NULL,
CRMD_JOINSTATE_PENDING, NULL, FALSE, __FUNCTION__);
}
}
trigger_fsa(fsa_source);
if(update != NULL) {
fsa_cib_anon_update(
XML_CIB_TAG_STATUS, update, cib_scope_local|cib_quorum_override|cib_can_create);
free_xml(update);
}
}
void
crmd_client_status_callback(const char * node, const char * client,
const char * status, void * private)
{
const char *join = NULL;
crm_node_t *member = NULL;
xmlNode *update = NULL;
gboolean clear_shutdown = FALSE;
crm_debug_3("Invoked");
if(safe_str_neq(client, CRM_SYSTEM_CRMD)) {
return;
}
if(safe_str_eq(status, JOINSTATUS)){
clear_shutdown = TRUE;
status = ONLINESTATUS;
join = CRMD_JOINSTATE_PENDING;
} else if(safe_str_eq(status, LEAVESTATUS)){
status = OFFLINESTATUS;
join = CRMD_JOINSTATE_DOWN;
/* clear_shutdown = TRUE; */
}
set_bit_inplace(fsa_input_register, R_PEER_DATA);
crm_notice("Status update: Client %s/%s now has status [%s] (DC=%s)",
node, client, status, AM_I_DC?"true":"false");
if(safe_str_eq(status, ONLINESTATUS)) {
/* remove the cached value in case it changed */
crm_debug_2("Uncaching UUID for %s", node);
unget_uuid(node);
}
member = crm_get_peer(0, node);
if(member == NULL || crm_is_member_active(member) == FALSE) {
/* Make sure it is created so crm_update_peer_proc() succeeds */
const char *uuid = get_uuid(node);
member = crm_update_peer(0, 0, 0, -1, 0, uuid, node, NULL, NULL);
}
crm_update_peer_proc(node, crm_proc_crmd, status);
if(is_set(fsa_input_register, R_CIB_CONNECTED) == FALSE) {
return;
} else if(fsa_state == S_STOPPING) {
return;
}
if(safe_str_eq(node, fsa_our_dc) && safe_str_eq(status, OFFLINESTATUS)){
/* did our DC leave us */
crm_info("Got client status callback - our DC is dead");
register_fsa_input(C_CRMD_STATUS_CALLBACK, I_ELECTION, NULL);
} else if(AM_I_DC == FALSE) {
crm_info("Not the DC");
} else {
crm_debug_3("Got client status callback");
update = create_node_state(
node, NULL, NULL, status, join, NULL, clear_shutdown, __FUNCTION__);
fsa_cib_anon_update(
XML_CIB_TAG_STATUS, update, cib_scope_local|cib_quorum_override|cib_can_create);
free_xml(update);
if(safe_str_eq(status, OFFLINESTATUS)) {
erase_node_from_join(node);
check_join_state(fsa_state, __FUNCTION__);
}
}
trigger_fsa(fsa_source);
}
void
crmd_ipc_connection_destroy(gpointer user_data)
{
GCHSource *source = NULL;
crmd_client_t *client = user_data;
/* Calling this function on an _active_ connection results in:
* crmd_ipc_connection_destroy (callbacks.c:431)
* -> G_main_del_IPC_Channel (GSource.c:478)
* -> g_source_unref
* -> G_CH_destroy_int (GSource.c:647)
* -> crmd_ipc_connection_destroy (callbacks.c:437)\
*
* A better alternative is to call G_main_del_IPC_Channel() directly
*/
if(client == NULL) {
crm_debug_4("No client to delete");
return;
}
crm_debug_2("Disconnecting client %s (%p)", client->table_key, client);
source = client->client_source;
client->client_source = NULL;
if(source != NULL) {
crm_debug_3("Deleting %s (%p) from mainloop",
client->table_key, source);
G_main_del_IPC_Channel(source);
}
crm_free(client->table_key);
crm_free(client->sub_sys);
crm_free(client->uuid);
crm_free(client);
return;
}
gboolean
crmd_client_connect(IPC_Channel *client_channel, gpointer user_data)
{
crm_debug_3("Invoked");
if (client_channel == NULL) {
crm_err("Channel was NULL");
} else if (client_channel->ch_status == IPC_DISCONNECT) {
crm_err("Channel was disconnected");
} else {
crmd_client_t *blank_client = NULL;
crm_debug_3("Channel connected");
crm_malloc0(blank_client, sizeof(crmd_client_t));
CRM_ASSERT(blank_client != NULL);
crm_debug_2("Created client: %p", blank_client);
client_channel->ops->set_recv_qlen(client_channel, 1024);
client_channel->ops->set_send_qlen(client_channel, 1024);
blank_client->client_channel = client_channel;
blank_client->sub_sys = NULL;
blank_client->uuid = NULL;
blank_client->table_key = NULL;
blank_client->client_source =
G_main_add_IPC_Channel(
G_PRIORITY_LOW, client_channel,
FALSE, crmd_ipc_msg_callback,
blank_client, crmd_ipc_connection_destroy);
}
return TRUE;
}
#if SUPPORT_HEARTBEAT
static gboolean fsa_have_quorum = FALSE;
gboolean ccm_dispatch(int fd, gpointer user_data)
{
int rc = 0;
oc_ev_t *ccm_token = (oc_ev_t*)user_data;
gboolean was_error = FALSE;
crm_debug_3("Invoked");
rc = oc_ev_handle_event(ccm_token);
if(rc != 0) {
if(is_set(fsa_input_register, R_CCM_DISCONNECTED) == FALSE) {
/* we signed out, so this is expected */
register_fsa_input(C_CCM_CALLBACK, I_ERROR, NULL);
crm_err("CCM connection appears to have failed: rc=%d.",
rc);
}
was_error = TRUE;
}
trigger_fsa(fsa_source);
return !was_error;
}
void
crmd_ccm_msg_callback(
oc_ed_t event, void *cookie, size_t size, const void *data)
{
gboolean update_cache = FALSE;
const oc_ev_membership_t *membership = data;
gboolean update_quorum = FALSE;
crm_debug_3("Invoked");
CRM_ASSERT(data != NULL);
crm_info("Quorum %s after event=%s (id=%d)",
ccm_have_quorum(event)?"(re)attained":"lost",
ccm_event_name(event), membership->m_instance);
if(crm_peer_seq > membership->m_instance) {
crm_err("Membership instance ID went backwards! %llu->%d",
crm_peer_seq, membership->m_instance);
CRM_ASSERT(crm_peer_seq <= membership->m_instance);
return;
}
/*
* OC_EV_MS_NEW_MEMBERSHIP: membership with quorum
* OC_EV_MS_MS_INVALID: membership without quorum
* OC_EV_MS_NOT_PRIMARY: previous membership no longer valid
* OC_EV_MS_PRIMARY_RESTORED: previous membership restored
* OC_EV_MS_EVICTED: the client is evicted from ccm.
*/
switch(event) {
case OC_EV_MS_NEW_MEMBERSHIP:
case OC_EV_MS_INVALID:
update_cache = TRUE;
update_quorum = TRUE;
break;
case OC_EV_MS_NOT_PRIMARY:
break;
case OC_EV_MS_PRIMARY_RESTORED:
update_cache = TRUE;
crm_peer_seq = membership->m_instance;
break;
case OC_EV_MS_EVICTED:
update_quorum = TRUE;
register_fsa_input(C_FSA_INTERNAL, I_STOP, NULL);
crm_err("Shutting down after CCM event: %s",
ccm_event_name(event));
break;
default:
crm_err("Unknown CCM event: %d", event);
}
if(update_quorum) {
crm_have_quorum = ccm_have_quorum(event);
crm_update_quorum(crm_have_quorum, FALSE);
if(crm_have_quorum == FALSE) {
/* did we just loose quorum? */
if(fsa_have_quorum) {
crm_info("Quorum lost: %s", ccm_event_name(event));
}
}
}
if(update_cache) {
crm_debug_2("Updating cache after event %s", ccm_event_name(event));
do_ccm_update_cache(C_CCM_CALLBACK, fsa_state, event, data, NULL);
} else if(event != OC_EV_MS_NOT_PRIMARY) {
crm_peer_seq = membership->m_instance;
register_fsa_action(A_TE_CANCEL);
}
oc_ev_callback_done(cookie);
return;
}
#endif
void
crmd_cib_connection_destroy(gpointer user_data)
{
CRM_CHECK(user_data == fsa_cib_conn, ;);
crm_debug_3("Invoked");
trigger_fsa(fsa_source);
fsa_cib_conn->state = cib_disconnected;
if(is_set(fsa_input_register, R_CIB_CONNECTED) == FALSE) {
crm_info("Connection to the CIB terminated...");
return;
}
/* eventually this will trigger a reconnect, not a shutdown */
crm_err("Connection to the CIB terminated...");
register_fsa_input(C_FSA_INTERNAL, I_ERROR, NULL);
clear_bit_inplace(fsa_input_register, R_CIB_CONNECTED);
return;
}
gboolean
crm_fsa_trigger(gpointer user_data)
{
crm_debug_2("Invoked (queue len: %d)", g_list_length(fsa_message_queue));
s_crmd_fsa(C_FSA_INTERNAL);
crm_debug_2("Exited (queue len: %d)", g_list_length(fsa_message_queue));
return TRUE;
}

File Metadata

Mime Type
text/x-c
Expires
Thu, Oct 16, 3:05 PM (14 h, 41 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
2507206
Default Alt Text
callbacks.c (16 KB)

Event Timeline