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asterisk/res/res_corosync.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2007, Digium, Inc.
* Copyright (C) 2012, Russell Bryant
*
* Russell Bryant <russell@russellbryant.net>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*!
* \file
* \author Russell Bryant <russell@russellbryant.net>
*
* This module is based on and replaces the previous res_ais module.
*/
/*** MODULEINFO
<depend>corosync</depend>
<defaultenabled>no</defaultenabled>
<support_level>extended</support_level>
***/
#include "asterisk.h"
#include <corosync/cpg.h>
#include <corosync/cfg.h>
#include "asterisk/module.h"
#include "asterisk/logger.h"
#include "asterisk/poll-compat.h"
#include "asterisk/config.h"
#include "asterisk/event.h"
#include "asterisk/cli.h"
#include "asterisk/devicestate.h"
#include "asterisk/mwi.h"
#include "asterisk/stasis.h"
#include "asterisk/stasis_message_router.h"
#include "asterisk/stasis_system.h"
#include "asterisk/taskprocessor.h"
AST_RWLOCK_DEFINE_STATIC(event_types_lock);
AST_RWLOCK_DEFINE_STATIC(init_cpg_lock);
/*! \brief Timeout for Corosync's poll process */
#define COROSYNC_POLL_TIMEOUT (10 * 1000)
static void publish_mwi_to_stasis(struct ast_event *event);
static void publish_device_state_to_stasis(struct ast_event *event);
static void publish_cluster_discovery_to_stasis(struct ast_event *event);
/*! \brief Join to corosync */
static int corosync_node_joined = 0;
/*! \brief All the nodes that we're aware of */
static struct ao2_container *nodes;
/*! \brief The internal topic used for message forwarding and pings */
static struct stasis_topic *corosync_aggregate_topic;
/*! \brief Our \ref stasis message router */
static struct stasis_message_router *stasis_router;
/*! \brief Internal accessor for our topic */
static struct stasis_topic *corosync_topic(void)
{
return corosync_aggregate_topic;
}
struct corosync_node {
/*! The corosync ID */
int id;
/*! The Asterisk EID */
struct ast_eid eid;
/*! The IP address of the node */
struct ast_sockaddr addr;
};
/*! \brief Corosync ipc dispatch/request and reply size */
#define COROSYNC_IPC_BUFFER_SIZE (8192 * 128)
/*! \brief Version of pthread_create to ensure stack is large enough */
#define corosync_pthread_create_background(a, b, c, d) \
ast_pthread_create_stack(a, b, c, d, \
(AST_BACKGROUND_STACKSIZE + (3 * COROSYNC_IPC_BUFFER_SIZE)), \
__FILE__, __FUNCTION__, __LINE__, #c)
static struct corosync_node *corosync_node_alloc(struct ast_event *event)
{
struct corosync_node *node;
node = ao2_alloc_options(sizeof(*node), NULL, AO2_ALLOC_OPT_LOCK_NOLOCK);
if (!node) {
return NULL;
}
memcpy(&node->eid, (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID), sizeof(node->eid));
node->id = ast_event_get_ie_uint(event, AST_EVENT_IE_NODE_ID);
ast_sockaddr_parse(&node->addr, ast_event_get_ie_str(event, AST_EVENT_IE_LOCAL_ADDR), PARSE_PORT_IGNORE);
return node;
}
static int corosync_node_hash_fn(const void *obj, const int flags)
{
const struct corosync_node *node;
const int *id;
switch (flags & OBJ_SEARCH_MASK) {
case OBJ_SEARCH_KEY:
id = obj;
break;
case OBJ_SEARCH_OBJECT:
node = obj;
id = &node->id;
break;
default:
ast_assert(0);
return 0;
}
return *id;
}
static int corosync_node_cmp_fn(void *obj, void *arg, int flags)
{
struct corosync_node *left = obj;
struct corosync_node *right = arg;
const int *id = arg;
int cmp;
switch (flags & OBJ_SEARCH_MASK) {
case OBJ_SEARCH_OBJECT:
id = &right->id;
/* Fall through */
case OBJ_SEARCH_KEY:
cmp = (left->id == *id);
break;
case OBJ_SEARCH_PARTIAL_KEY:
cmp = (left->id == right->id);
break;
default:
/* Sort can only work on something with a full or partial key. */
ast_assert(0);
cmp = 1;
break;
}
return cmp ? CMP_MATCH : 0;
}
/*! \brief A payload wrapper around a corosync ping event */
struct corosync_ping_payload {
/*! The corosync ping event being passed over \ref stasis */
struct ast_event *event;
};
/*! \brief Destructor for the \ref corosync_ping_payload wrapper object */
static void corosync_ping_payload_dtor(void *obj)
{
struct corosync_ping_payload *payload = obj;
ast_free(payload->event);
}
/*! \brief Convert a Corosync PING to a \ref ast_event */
static struct ast_event *corosync_ping_to_event(struct stasis_message *message)
{
struct corosync_ping_payload *payload;
struct ast_event *event;
struct ast_eid *event_eid;
if (!message) {
return NULL;
}
payload = stasis_message_data(message);
if (!payload->event) {
return NULL;
}
event_eid = (struct ast_eid *)ast_event_get_ie_raw(payload->event, AST_EVENT_IE_EID);
event = ast_event_new(AST_EVENT_PING,
AST_EVENT_IE_EID, AST_EVENT_IE_PLTYPE_RAW, event_eid, sizeof(*event_eid),
AST_EVENT_IE_END);
return event;
}
STASIS_MESSAGE_TYPE_DEFN_LOCAL(corosync_ping_message_type,
.to_event = corosync_ping_to_event, );
/*! \brief Publish a Corosync ping to \ref stasis */
static void publish_corosync_ping_to_stasis(struct ast_event *event)
{
struct corosync_ping_payload *payload;
struct stasis_message *message;
struct ast_eid *event_eid;
ast_assert(ast_event_get_type(event) == AST_EVENT_PING);
ast_assert(event != NULL);
if (!corosync_ping_message_type()) {
return;
}
payload = ao2_t_alloc(sizeof(*payload), corosync_ping_payload_dtor, "Create ping payload");
if (!payload) {
return;
}
event_eid = (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID);
payload->event = ast_event_new(AST_EVENT_PING,
AST_EVENT_IE_EID, AST_EVENT_IE_PLTYPE_RAW, event_eid, sizeof(*event_eid),
AST_EVENT_IE_END);
message = stasis_message_create(corosync_ping_message_type(), payload);
if (!message) {
ao2_t_ref(payload, -1, "Destroy payload on off nominal");
return;
}
stasis_publish(corosync_topic(), message);
ao2_t_ref(payload, -1, "Hand ref to stasis");
ao2_t_ref(message, -1, "Hand ref to stasis");
}
static struct {
const char *name;
struct stasis_forward *sub;
unsigned char publish;
unsigned char publish_default;
unsigned char subscribe;
unsigned char subscribe_default;
struct stasis_topic *(* topic_fn)(void);
struct stasis_cache *(* cache_fn)(void);
struct stasis_message_type *(* message_type_fn)(void);
void (* publish_to_stasis)(struct ast_event *);
} event_types[] = {
[AST_EVENT_MWI] = { .name = "mwi",
.topic_fn = ast_mwi_topic_all,
.cache_fn = ast_mwi_state_cache,
.message_type_fn = ast_mwi_state_type,
.publish_to_stasis = publish_mwi_to_stasis, },
[AST_EVENT_DEVICE_STATE_CHANGE] = { .name = "device_state",
.topic_fn = ast_device_state_topic_all,
.cache_fn = ast_device_state_cache,
.message_type_fn = ast_device_state_message_type,
.publish_to_stasis = publish_device_state_to_stasis, },
[AST_EVENT_PING] = { .name = "ping",
.publish_default = 1,
.subscribe_default = 1,
.topic_fn = corosync_topic,
.message_type_fn = corosync_ping_message_type,
.publish_to_stasis = publish_corosync_ping_to_stasis, },
[AST_EVENT_CLUSTER_DISCOVERY] = { .name = "cluster_discovery",
.publish_default = 1,
.subscribe_default = 1,
.topic_fn = ast_system_topic,
.message_type_fn = ast_cluster_discovery_type,
.publish_to_stasis = publish_cluster_discovery_to_stasis, },
};
static struct {
pthread_t id;
int alert_pipe[2];
unsigned int stop:1;
} dispatch_thread = {
.id = AST_PTHREADT_NULL,
.alert_pipe = { -1, -1 },
};
static cpg_handle_t cpg_handle;
static corosync_cfg_handle_t cfg_handle;
#ifdef HAVE_COROSYNC_CFG_STATE_TRACK
static void cfg_state_track_cb(
corosync_cfg_state_notification_buffer_t *notification_buffer,
cs_error_t error);
#endif /* HAVE_COROSYNC_CFG_STATE_TRACK */
static void cfg_shutdown_cb(corosync_cfg_handle_t cfg_handle,
corosync_cfg_shutdown_flags_t flags);
static corosync_cfg_callbacks_t cfg_callbacks = {
#ifdef HAVE_COROSYNC_CFG_STATE_TRACK
.corosync_cfg_state_track_callback = cfg_state_track_cb,
#endif /* HAVE_COROSYNC_CFG_STATE_TRACK */
.corosync_cfg_shutdown_callback = cfg_shutdown_cb,
};
/*! \brief Publish cluster discovery to \ref stasis */
static void publish_cluster_discovery_to_stasis_full(struct corosync_node *node, int joined)
{
struct ast_json *json;
struct ast_json_payload *payload;
struct stasis_message *message;
char eid[18];
const char *addr;
ast_eid_to_str(eid, sizeof(eid), &node->eid);
addr = ast_sockaddr_stringify_addr(&node->addr);
ast_log(AST_LOG_NOTICE, "Node %u (%s) at %s %s the cluster\n",
node->id,
eid,
addr,
joined ? "joined" : "left");
json = ast_json_pack("{s: s, s: i, s: s, s: i}",
"address", addr,
"node_id", node->id,
"eid", eid,
"joined", joined);
if (!json) {
return;
}
payload = ast_json_payload_create(json);
if (!payload) {
ast_json_unref(json);
return;
}
message = stasis_message_create(ast_cluster_discovery_type(), payload);
if (!message) {
ast_json_unref(json);
ao2_ref(payload, -1);
return;
}
stasis_publish(ast_system_topic(), message);
ast_json_unref(json);
ao2_ref(payload, -1);
ao2_ref(message, -1);
}
static void send_cluster_notify(void);
/*! \brief Publish a received cluster discovery \ref ast_event to \ref stasis */
static void publish_cluster_discovery_to_stasis(struct ast_event *event)
{
struct corosync_node *node;
int id = ast_event_get_ie_uint(event, AST_EVENT_IE_NODE_ID);
struct ast_eid *event_eid;
ast_assert(ast_event_get_type(event) == AST_EVENT_CLUSTER_DISCOVERY);
event_eid = (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID);
if (!event_eid || !ast_eid_cmp(&ast_eid_default, event_eid)) {
/* Don't feed events back in that originated locally. */
return;
}
ao2_lock(nodes);
node = ao2_find(nodes, &id, OBJ_SEARCH_KEY | OBJ_NOLOCK);
if (node) {
/* We already know about this node */
ao2_unlock(nodes);
ao2_ref(node, -1);
return;
}
node = corosync_node_alloc(event);
if (!node) {
ao2_unlock(nodes);
return;
}
ao2_link_flags(nodes, node, OBJ_NOLOCK);
ao2_unlock(nodes);
publish_cluster_discovery_to_stasis_full(node, 1);
ao2_ref(node, -1);
/*
* When we get news that someone else has joined, we need to let them
* know we exist as well.
*/
send_cluster_notify();
}
/*! \brief Publish a received MWI \ref ast_event to \ref stasis */
static void publish_mwi_to_stasis(struct ast_event *event)
{
const char *mailbox;
const char *context;
unsigned int new_msgs;
unsigned int old_msgs;
struct ast_eid *event_eid;
ast_assert(ast_event_get_type(event) == AST_EVENT_MWI);
mailbox = ast_event_get_ie_str(event, AST_EVENT_IE_MAILBOX);
context = ast_event_get_ie_str(event, AST_EVENT_IE_CONTEXT);
new_msgs = ast_event_get_ie_uint(event, AST_EVENT_IE_NEWMSGS);
old_msgs = ast_event_get_ie_uint(event, AST_EVENT_IE_OLDMSGS);
event_eid = (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID);
if (ast_strlen_zero(mailbox) || ast_strlen_zero(context)) {
return;
}
if (new_msgs > INT_MAX) {
new_msgs = INT_MAX;
}
if (old_msgs > INT_MAX) {
old_msgs = INT_MAX;
}
if (ast_publish_mwi_state_full(mailbox, context, (int)new_msgs,
(int)old_msgs, NULL, event_eid)) {
char eid[18];
ast_eid_to_str(eid, sizeof(eid), event_eid);
ast_log(LOG_WARNING, "Failed to publish MWI message for %s@%s from %s\n",
mailbox, context, eid);
}
}
/*! \brief Publish a received device state \ref ast_event to \ref stasis */
static void publish_device_state_to_stasis(struct ast_event *event)
{
const char *device;
enum ast_device_state state;
unsigned int cachable;
struct ast_eid *event_eid;
ast_assert(ast_event_get_type(event) == AST_EVENT_DEVICE_STATE_CHANGE);
device = ast_event_get_ie_str(event, AST_EVENT_IE_DEVICE);
state = ast_event_get_ie_uint(event, AST_EVENT_IE_STATE);
cachable = ast_event_get_ie_uint(event, AST_EVENT_IE_CACHABLE);
event_eid = (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID);
if (ast_strlen_zero(device)) {
return;
}
if (ast_publish_device_state_full(device, state, cachable, event_eid)) {
char eid[18];
ast_eid_to_str(eid, sizeof(eid), event_eid);
ast_log(LOG_WARNING, "Failed to publish device state message for %s from %s\n",
device, eid);
}
}
static void cpg_deliver_cb(cpg_handle_t handle, const struct cpg_name *group_name,
uint32_t nodeid, uint32_t pid, void *msg, size_t msg_len);
static void cpg_confchg_cb(cpg_handle_t handle, const struct cpg_name *group_name,
const struct cpg_address *member_list, size_t member_list_entries,
const struct cpg_address *left_list, size_t left_list_entries,
const struct cpg_address *joined_list, size_t joined_list_entries);
static cpg_callbacks_t cpg_callbacks = {
.cpg_deliver_fn = cpg_deliver_cb,
.cpg_confchg_fn = cpg_confchg_cb,
};
#ifdef HAVE_COROSYNC_CFG_STATE_TRACK
static void cfg_state_track_cb(
corosync_cfg_state_notification_buffer_t *notification_buffer,
cs_error_t error)
{
}
#endif /* HAVE_COROSYNC_CFG_STATE_TRACK */
static void cfg_shutdown_cb(corosync_cfg_handle_t cfg_handle,
corosync_cfg_shutdown_flags_t flags)
{
}
static void cpg_deliver_cb(cpg_handle_t handle, const struct cpg_name *group_name,
uint32_t nodeid, uint32_t pid, void *msg, size_t msg_len)
{
struct ast_event *event;
void (*publish_handler)(struct ast_event *) = NULL;
enum ast_event_type event_type;
struct ast_eid *event_eid;
if (msg_len < ast_event_minimum_length()) {
ast_debug(1, "Ignoring event that's too small. %u < %u\n",
(unsigned int) msg_len,
(unsigned int) ast_event_minimum_length());
return;
}
event_eid = (struct ast_eid *)ast_event_get_ie_raw(msg, AST_EVENT_IE_EID);
if (!event_eid || !ast_eid_cmp(&ast_eid_default, event_eid)) {
/* Don't feed events back in that originated locally. */
return;
}
event_type = ast_event_get_type(msg);
if (event_type > AST_EVENT_TOTAL) {
/* Egads, we don't support this */
return;
}
ast_rwlock_rdlock(&event_types_lock);
ast_debug(5, "cpg_deliver_cb rdlock\n");
publish_handler = event_types[event_type].publish_to_stasis;
if (!event_types[event_type].subscribe || !publish_handler) {
/* We are not configured to subscribe to these events or
we have no way to publish it internally. */
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_deliver_cb unlock\n");
return;
}
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_deliver_cb unlock\n");
if (!(event = ast_malloc(msg_len))) {
return;
}
memcpy(event, msg, msg_len);
if (event_type == AST_EVENT_PING) {
const struct ast_eid *eid;
char buf[128] = "";
eid = (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID);
ast_eid_to_str(buf, sizeof(buf), (struct ast_eid *) eid);
ast_log(LOG_NOTICE, "Got event PING from server with EID: '%s'\n", buf);
}
ast_debug(5, "Publishing event %s (%u) to stasis\n",
ast_event_get_type_name(event), event_type);
publish_handler(event);
ast_free(event);
}
static void publish_event_to_corosync(struct ast_event *event)
{
cs_error_t cs_err;
struct iovec iov;
iov.iov_base = (void *)event;
iov.iov_len = ast_event_get_size(event);
ast_debug(5, "Publishing event %s (%u) to corosync\n",
ast_event_get_type_name(event), ast_event_get_type(event));
/* The stasis subscription will only exist if we are configured to publish
* these events, so just send away. */
if (corosync_node_joined && !ast_rwlock_tryrdlock(&init_cpg_lock)) {
ast_debug(5, "publish_event_to_corosync rdlock\n");
if ((cs_err = cpg_mcast_joined(cpg_handle, CPG_TYPE_FIFO, &iov, 1)) != CS_OK) {
ast_log(LOG_WARNING, "CPG mcast failed (%u) for event %s (%u)\n",
cs_err, ast_event_get_type_name(event), ast_event_get_type(event));
}
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "publish_event_to_corosync unlock\n");
} else {
ast_log(LOG_WARNING, "CPG mcast not executed for event %s (%u): initializing CPG.\n",
ast_event_get_type_name(event), ast_event_get_type(event));
}
}
static void publish_to_corosync(struct stasis_message *message)
{
struct ast_event *event;
struct ast_eid *event_eid;
event = stasis_message_to_event(message);
if (!event) {
return;
}
event_eid = (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID);
if (!event_eid || ast_eid_cmp(&ast_eid_default, event_eid)) {
/* If the event didn't originate from this server, don't send it back out. */
ast_event_destroy(event);
return;
}
if (ast_event_get_type(event) == AST_EVENT_PING) {
const struct ast_eid *eid;
char buf[128] = "";
eid = (struct ast_eid *)ast_event_get_ie_raw(event, AST_EVENT_IE_EID);
ast_eid_to_str(buf, sizeof(buf), (struct ast_eid *) eid);
ast_log(LOG_NOTICE, "Sending event PING from this server with EID: '%s'\n", buf);
}
publish_event_to_corosync(event);
ast_event_destroy(event);
}
static void stasis_message_cb(void *data, struct stasis_subscription *sub, struct stasis_message *message)
{
if (!message) {
return;
}
publish_to_corosync(message);
}
static int dump_cache_cb(void *obj, void *arg, int flags)
{
struct stasis_message *message = obj;
if (!message) {
return 0;
}
publish_to_corosync(message);
return 0;
}
static int clear_node_cache(void *obj, void *arg, int flags)
{
struct stasis_message *cached_msg = obj;
struct stasis_topic *topic = arg;
struct stasis_message *msg;
struct ast_eid *msg_eid;
if (!cached_msg) {
return 0;
}
msg_eid = (struct ast_eid *)stasis_message_eid(cached_msg);
if(msg_eid && ast_eid_cmp(&ast_eid_default, msg_eid))
{
msg = stasis_cache_clear_create(cached_msg);
if (msg) {
stasis_publish(topic, msg);
ao2_cleanup(msg);
}
}
return 0;
}
static void cpg_confchg_cb(cpg_handle_t handle, const struct cpg_name *group_name,
const struct cpg_address *member_list, size_t member_list_entries,
const struct cpg_address *left_list, size_t left_list_entries,
const struct cpg_address *joined_list, size_t joined_list_entries)
{
unsigned int i;
for (i = 0; i < left_list_entries; i++) {
const struct cpg_address *cpg_node = &left_list[i];
struct corosync_node* node;
unsigned int j;
node = ao2_find(nodes, &cpg_node->nodeid, OBJ_UNLINK | OBJ_SEARCH_KEY);
if (!node) {
continue;
}
for (j = 0; j < ARRAY_LEN(event_types); j++) {
struct ao2_container *messages;
int messages_count;
ast_rwlock_rdlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb rdlock\n");
if (!event_types[j].subscribe) {
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb unlock\n");
continue;
}
if (!event_types[j].cache_fn || !event_types[j].message_type_fn) {
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb unlock\n");
continue;
}
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb unlock\n");
messages = stasis_cache_dump_by_eid(event_types[j].cache_fn(), event_types[j].message_type_fn(), &node->eid);
messages_count = ao2_container_count(messages);
ast_log(LOG_NOTICE, "Clearing %i events of type %s of node %i from stasis cache.\n", messages_count, event_types[j].name, node->id);
ao2_callback(messages, OBJ_NODATA, clear_node_cache, event_types[j].topic_fn());
ast_log(LOG_NOTICE, "Cleared events of type %s from stasis cache.\n", event_types[j].name);
ao2_t_ref(messages, -1, "Dispose of flushed cache");
}
publish_cluster_discovery_to_stasis_full(node, 0);
ao2_ref(node, -1);
}
/* If any new nodes have joined, dump our cache of events we are publishing
* that originated from this server. */
if (!joined_list_entries) {
return;
}
for (i = 0; i < ARRAY_LEN(event_types); i++) {
struct ao2_container *messages;
int messages_count;
ast_rwlock_rdlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb rdlock\n");
if (!event_types[i].publish) {
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb unlock\n");
continue;
}
if (!event_types[i].cache_fn || !event_types[i].message_type_fn) {
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb unlock\n");
continue;
}
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cpg_confchg_cb unlock\n");
messages = stasis_cache_dump_by_eid(event_types[i].cache_fn(), event_types[i].message_type_fn(), &ast_eid_default);
messages_count = ao2_container_count(messages);
ast_log(LOG_NOTICE, "Sending %i events of type %s to corosync.\n", messages_count, event_types[i].name);
ao2_callback(messages, OBJ_NODATA, dump_cache_cb, NULL);
ast_log(LOG_NOTICE, "Sent events of type %s to corosync.\n", event_types[i].name);
ao2_t_ref(messages, -1, "Dispose of dumped cache");
}
}
/*! \brief Informs the cluster of our EID and our IP addresses */
static void send_cluster_notify(void)
{
struct ast_event *event;
unsigned int node_id;
cs_error_t cs_err;
corosync_cfg_node_address_t corosync_addr;
int num_addrs = 0;
struct sockaddr *sa;
size_t sa_len;
char buf[128];
int res;
if (!ast_rwlock_tryrdlock(&init_cpg_lock)) {
ast_debug(5, "send_cluster_notify rdlock\n");
if ((cs_err = corosync_cfg_local_get(cfg_handle, &node_id)) != CS_OK) {
ast_log(LOG_WARNING, "Failed to extract Corosync node ID for this node. Not informing cluster of existance.\n");
return;
}
if (((cs_err = corosync_cfg_get_node_addrs(cfg_handle, node_id, 1, &num_addrs, &corosync_addr)) != CS_OK) || (num_addrs < 1)) {
ast_log(LOG_WARNING, "Failed to get local Corosync address. Not informing cluster of existance.\n");
return;
}
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "send_cluster_notify unlock\n");
}
sa = (struct sockaddr *)corosync_addr.address;
sa_len = (size_t)corosync_addr.address_length;
if ((res = getnameinfo(sa, sa_len, buf, sizeof(buf), NULL, 0, NI_NUMERICHOST))) {
ast_log(LOG_WARNING, "Failed to determine name of local Corosync address: %s (%d). Not informing cluster of existance.\n",
gai_strerror(res), res);
return;
}
event = ast_event_new(AST_EVENT_CLUSTER_DISCOVERY,
AST_EVENT_IE_NODE_ID, AST_EVENT_IE_PLTYPE_UINT, node_id,
AST_EVENT_IE_LOCAL_ADDR, AST_EVENT_IE_PLTYPE_STR, buf,
AST_EVENT_IE_END);
publish_event_to_corosync(event);
ast_event_destroy(event);
}
static void *dispatch_thread_handler(void *data)
{
cs_error_t cs_err;
struct pollfd pfd[3] = {
{ .events = POLLIN, },
{ .events = POLLIN, },
{ .events = POLLIN, },
};
if (!ast_rwlock_tryrdlock(&init_cpg_lock)) {
ast_debug(5, "dispatch_thread_handler rdlock\n");
if ((cs_err = cpg_fd_get(cpg_handle, &pfd[0].fd)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to get CPG fd. This module is now broken.\n");
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
return NULL;
}
if ((cs_err = corosync_cfg_fd_get(cfg_handle, &pfd[1].fd)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to get CFG fd. This module is now broken.\n");
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
return NULL;
}
pfd[2].fd = dispatch_thread.alert_pipe[0];
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
} else {
ast_log(LOG_ERROR, "Failed to get fd: initializing CPG. This module is now broken.\n");
return NULL;
}
send_cluster_notify();
while (!dispatch_thread.stop) {
int res;
cs_err = CS_OK;
pfd[0].revents = 0;
pfd[1].revents = 0;
pfd[2].revents = 0;
res = ast_poll(pfd, ARRAY_LEN(pfd), COROSYNC_POLL_TIMEOUT);
if (res == -1 && errno != EINTR && errno != EAGAIN) {
ast_log(LOG_ERROR, "poll() error: %s (%d)\n", strerror(errno), errno);
cs_err = CS_ERR_BAD_HANDLE;
} else if (res == 0) {
unsigned int local_nodeid;
if (!ast_rwlock_tryrdlock(&init_cpg_lock)) {
ast_debug(5, "dispatch_thread_handler rdlock\n");
if ((cs_err = cpg_local_get(cpg_handle, &local_nodeid)) == CS_OK) {
struct cpg_name name;
struct cpg_address address[CPG_MEMBERS_MAX];
int entries = CPG_MEMBERS_MAX;
ast_copy_string(name.value, "asterisk", sizeof(name.value));
name.length = strlen(name.value);
if ((cs_err = cpg_membership_get(cpg_handle, &name, address, &entries)) == CS_OK) {
int i;
int found = 0;
ast_debug(1, "CPG group has %i node membership\n", entries);
for (i = 0; (i < entries) && !found; i++) {
if (address[i].nodeid == local_nodeid)
found = 1;
}
if (!found) {
ast_log(LOG_WARNING, "Failed to check CPG node membership\n");
corosync_node_joined = 0;
cs_err = CS_ERR_BAD_HANDLE;
}
} else {
ast_log(LOG_WARNING, "Failed to get CPG node membership: %u\n", cs_err);
corosync_node_joined = 0;
cs_err = CS_ERR_BAD_HANDLE;
}
} else {
ast_log(LOG_WARNING, "Failed to get CPG local node id: %u\n", cs_err);
corosync_node_joined = 0;
cs_err = CS_ERR_BAD_HANDLE;
}
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
} else {
ast_log(LOG_WARNING, "Failed to check CPG node membership: initializing CPG.\n");
corosync_node_joined = 0;
cs_err = CS_ERR_BAD_HANDLE;
}
} else {
if (!ast_rwlock_tryrdlock(&init_cpg_lock)) {
ast_debug(5, "dispatch_thread_handler rdlock\n");
if (pfd[0].revents & POLLIN) {
if ((cs_err = cpg_dispatch(cpg_handle, CS_DISPATCH_ALL)) != CS_OK) {
ast_log(LOG_WARNING, "Failed CPG dispatch: %u\n", cs_err);
}
}
if (pfd[1].revents & POLLIN) {
if ((cs_err = corosync_cfg_dispatch(cfg_handle, CS_DISPATCH_ALL)) != CS_OK) {
ast_log(LOG_WARNING, "Failed CFG dispatch: %u\n", cs_err);
}
}
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
} else {
ast_log(LOG_WARNING, "Failed to dispatch: initializing CPG.\n");
}
}
if (cs_err == CS_ERR_LIBRARY || cs_err == CS_ERR_BAD_HANDLE) {
/* If corosync gets restarted out from under Asterisk, try to recover. */
ast_log(LOG_NOTICE, "Attempting to recover from corosync failure.\n");
if (!ast_rwlock_trywrlock(&init_cpg_lock)) {
struct cpg_name name;
ast_debug(5, "dispatch_thread_handler wrlock\n");
corosync_node_joined = 0;
if (cpg_handle && (cs_err = cpg_finalize(cpg_handle)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to finalize cpg (%d)\n", (int) cs_err);
}
if (cfg_handle && (cs_err = corosync_cfg_finalize(cfg_handle)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to finalize cfg (%d)\n", (int) cs_err);
}
if ((cs_err = corosync_cfg_initialize(&cfg_handle, &cfg_callbacks)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to initialize cfg (%d)\n", (int) cs_err);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
sleep(5);
continue;
}
if ((cs_err = cpg_initialize(&cpg_handle, &cpg_callbacks) != CS_OK)) {
ast_log(LOG_ERROR, "Failed to initialize cpg (%d)\n", (int) cs_err);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
sleep(5);
continue;
}
if ((cs_err = cpg_fd_get(cpg_handle, &pfd[0].fd)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to get CPG fd.\n");
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
sleep(5);
continue;
}
if ((cs_err = corosync_cfg_fd_get(cfg_handle, &pfd[1].fd)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to get CFG fd.\n");
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
sleep(5);
continue;
}
ast_copy_string(name.value, "asterisk", sizeof(name.value));
name.length = strlen(name.value);
if ((cs_err = cpg_join(cpg_handle, &name)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to join cpg (%d)\n", (int) cs_err);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
sleep(5);
continue;
}
corosync_node_joined = 1;
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "dispatch_thread_handler unlock\n");
ast_log(LOG_NOTICE, "Corosync recovery complete.\n");
send_cluster_notify();
} else {
ast_log(LOG_NOTICE, "Failed to recover from corosync failure: initializing CPG.\n");
}
}
}
return NULL;
}
static char *corosync_show_members(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
cs_error_t cs_err;
cpg_iteration_handle_t cpg_iter;
struct cpg_iteration_description_t cpg_desc;
unsigned int i;
switch (cmd) {
case CLI_INIT:
e->command = "corosync show members";
e->usage =
"Usage: corosync show members\n"
" Show corosync cluster members\n";
return NULL;
case CLI_GENERATE:
return NULL; /* no completion */
}
if (a->argc != e->args) {
return CLI_SHOWUSAGE;
}
if (!ast_rwlock_tryrdlock(&init_cpg_lock)) {
ast_debug(5, "corosync_show_members rdlock\n");
cs_err = cpg_iteration_initialize(cpg_handle, CPG_ITERATION_ALL, NULL, &cpg_iter);
if (cs_err != CS_OK) {
ast_cli(a->fd, "Failed to initialize CPG iterator: %u.\n", cs_err);
cpg_iteration_finalize(cpg_iter);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "corosync_show_members unlock\n");
return CLI_FAILURE;
}
ast_cli(a->fd, "\n"
"=============================================================\n"
"=== Cluster members =========================================\n"
"=============================================================\n"
"===\n");
for (i = 1, cs_err = cpg_iteration_next(cpg_iter, &cpg_desc);
cs_err == CS_OK;
cs_err = cpg_iteration_next(cpg_iter, &cpg_desc), i++) {
#ifdef HAVE_COROSYNC_CFG_STATE_TRACK
corosync_cfg_node_address_t addrs[8];
int num_addrs = 0;
unsigned int j;
#endif
ast_cli(a->fd, "=== Node %u\n", i);
ast_cli(a->fd, "=== --> Group: %s\n", cpg_desc.group.value);
#ifdef HAVE_COROSYNC_CFG_STATE_TRACK
/*
* Corosync 2.x cfg lib needs to allocate 1M on stack after calling
* corosync_cfg_get_node_addrs. netconsole thread has allocated only 0.5M
* resulting in crash.
*/
cs_err = corosync_cfg_get_node_addrs(cfg_handle, cpg_desc.nodeid,
ARRAY_LEN(addrs), &num_addrs, addrs);
if (cs_err != CS_OK) {
ast_log(LOG_WARNING, "Failed to get node addresses\n");
continue;
}
for (j = 0; j < num_addrs; j++) {
struct sockaddr *sa = (struct sockaddr *) addrs[j].address;
size_t sa_len = (size_t) addrs[j].address_length;
char buf[128];
getnameinfo(sa, sa_len, buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
ast_cli(a->fd, "=== --> Address %u: %s\n", j + 1, buf);
}
#else
ast_cli(a->fd, "=== --> Nodeid: %"PRIu32"\n", cpg_desc.nodeid);
#endif
}
ast_cli(a->fd, "===\n"
"=============================================================\n"
"\n");
cpg_iteration_finalize(cpg_iter);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "corosync_show_members unlock\n");
} else {
ast_cli(a->fd, "Failed to initialize CPG iterator: initializing CPG.\n");
}
return CLI_SUCCESS;
}
static char *corosync_ping(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
struct ast_event *event;
switch (cmd) {
case CLI_INIT:
e->command = "corosync ping";
e->usage =
"Usage: corosync ping\n"
" Send a test ping to the cluster.\n"
"A NOTICE will be in the log for every ping received\n"
"on a server.\n If you send a ping, you should see a NOTICE\n"
"in the log for every server in the cluster.\n";
return NULL;
case CLI_GENERATE:
return NULL; /* no completion */
}
if (a->argc != e->args) {
return CLI_SHOWUSAGE;
}
event = ast_event_new(AST_EVENT_PING, AST_EVENT_IE_END);
if (!event) {
return CLI_FAILURE;
}
event_types[AST_EVENT_PING].publish_to_stasis(event);
ast_event_destroy(event);
return CLI_SUCCESS;
}
static char *corosync_show_config(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
unsigned int i;
switch (cmd) {
case CLI_INIT:
e->command = "corosync show config";
e->usage =
"Usage: corosync show config\n"
" Show configuration loaded from res_corosync.conf\n";
return NULL;
case CLI_GENERATE:
return NULL; /* no completion */
}
if (a->argc != e->args) {
return CLI_SHOWUSAGE;
}
ast_cli(a->fd, "\n"
"=============================================================\n"
"=== res_corosync config =====================================\n"
"=============================================================\n"
"===\n");
ast_rwlock_rdlock(&event_types_lock);
ast_debug(5, "corosync_show_config rdlock\n");
for (i = 0; i < ARRAY_LEN(event_types); i++) {
if (event_types[i].publish) {
ast_cli(a->fd, "=== ==> Publishing Event Type: %s\n",
event_types[i].name);
}
if (event_types[i].subscribe) {
ast_cli(a->fd, "=== ==> Subscribing to Event Type: %s\n",
event_types[i].name);
}
}
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "corosync_show_config unlock\n");
ast_cli(a->fd, "===\n"
"=============================================================\n"
"\n");
return CLI_SUCCESS;
}
static struct ast_cli_entry corosync_cli[] = {
AST_CLI_DEFINE(corosync_show_config, "Show configuration"),
AST_CLI_DEFINE(corosync_show_members, "Show cluster members"),
AST_CLI_DEFINE(corosync_ping, "Send a test ping to the cluster"),
};
enum {
PUBLISH,
SUBSCRIBE,
};
static int set_event(const char *event_type, int pubsub)
{
unsigned int i;
for (i = 0; i < ARRAY_LEN(event_types); i++) {
if (!event_types[i].name || strcasecmp(event_type, event_types[i].name)) {
continue;
}
switch (pubsub) {
case PUBLISH:
event_types[i].publish = 1;
break;
case SUBSCRIBE:
event_types[i].subscribe = 1;
break;
}
break;
}
return (i == ARRAY_LEN(event_types)) ? -1 : 0;
}
static int load_general_config(struct ast_config *cfg)
{
struct ast_variable *v;
int res = 0;
unsigned int i;
ast_rwlock_wrlock(&event_types_lock);
ast_debug(5, "load_general_config wrlock\n");
for (i = 0; i < ARRAY_LEN(event_types); i++) {
event_types[i].publish = event_types[i].publish_default;
event_types[i].subscribe = event_types[i].subscribe_default;
}
for (v = ast_variable_browse(cfg, "general"); v && !res; v = v->next) {
if (!strcasecmp(v->name, "publish_event")) {
res = set_event(v->value, PUBLISH);
} else if (!strcasecmp(v->name, "subscribe_event")) {
res = set_event(v->value, SUBSCRIBE);
} else {
ast_log(LOG_WARNING, "Unknown option '%s'\n", v->name);
}
}
for (i = 0; i < ARRAY_LEN(event_types); i++) {
if (event_types[i].publish && !event_types[i].sub) {
event_types[i].sub = stasis_forward_all(event_types[i].topic_fn(),
corosync_topic());
stasis_message_router_add(stasis_router,
event_types[i].message_type_fn(),
stasis_message_cb,
NULL);
} else if (!event_types[i].publish && event_types[i].sub) {
event_types[i].sub = stasis_forward_cancel(event_types[i].sub);
stasis_message_router_remove(stasis_router,
event_types[i].message_type_fn());
}
}
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "load_general_config unlock\n");
return res;
}
static int load_config(unsigned int reload)
{
static const char filename[] = "res_corosync.conf";
struct ast_config *cfg;
const char *cat = NULL;
struct ast_flags config_flags = { 0 };
int res = 0;
cfg = ast_config_load(filename, config_flags);
if (cfg == CONFIG_STATUS_FILEMISSING || cfg == CONFIG_STATUS_FILEINVALID) {
return -1;
}
while ((cat = ast_category_browse(cfg, cat))) {
if (!strcasecmp(cat, "general")) {
res = load_general_config(cfg);
} else {
ast_log(LOG_WARNING, "Unknown configuration section '%s'\n", cat);
}
}
ast_config_destroy(cfg);
return res;
}
static void cleanup_module(void)
{
cs_error_t cs_err;
unsigned int i;
if (stasis_router) {
/* Unsubscribe all topic forwards and cancel all message routes */
for (i = 0; i < ARRAY_LEN(event_types); i++) {
struct ao2_container *messages = NULL;
int messages_count;
unsigned char subscribe = 0;
ast_rwlock_wrlock(&event_types_lock);
ast_debug(5, "cleanup_module wrlock\n");
subscribe = event_types[i].subscribe;
if (event_types[i].sub) {
event_types[i].sub = stasis_forward_cancel(event_types[i].sub);
stasis_message_router_remove(stasis_router, event_types[i].message_type_fn());
}
event_types[i].publish = 0;
event_types[i].subscribe = 0;
ast_rwlock_unlock(&event_types_lock);
ast_debug(5, "cleanup_module unlock\n");
if (subscribe && event_types[i].cache_fn && event_types[i].message_type_fn) {
messages = stasis_cache_dump_all(event_types[i].cache_fn(), event_types[i].message_type_fn());
messages_count = ao2_container_count(messages);
ast_log(LOG_NOTICE, "Clearing %i events of type %s of other nodes from stasis cache.\n", messages_count, event_types[i].name);
ao2_callback(messages, OBJ_NODATA, clear_node_cache, event_types[i].topic_fn());
ast_log(LOG_NOTICE, "Cleared events of type %s from stasis cache.\n", event_types[i].name);
ao2_t_ref(messages, -1, "Dispose of flushed cache");
}
}
stasis_message_router_unsubscribe_and_join(stasis_router);
stasis_router = NULL;
}
if (corosync_aggregate_topic) {
ao2_t_ref(corosync_aggregate_topic, -1, "Dispose of topic on cleanup");
corosync_aggregate_topic = NULL;
}
STASIS_MESSAGE_TYPE_CLEANUP(corosync_ping_message_type);
if (dispatch_thread.id != AST_PTHREADT_NULL) {
char meepmeep = 'x';
dispatch_thread.stop = 1;
if (ast_carefulwrite(dispatch_thread.alert_pipe[1], &meepmeep, 1,
5000) == -1) {
ast_log(LOG_ERROR, "Failed to write to pipe: %s (%d)\n",
strerror(errno), errno);
}
pthread_join(dispatch_thread.id, NULL);
}
if (dispatch_thread.alert_pipe[0] != -1) {
close(dispatch_thread.alert_pipe[0]);
dispatch_thread.alert_pipe[0] = -1;
}
if (dispatch_thread.alert_pipe[1] != -1) {
close(dispatch_thread.alert_pipe[1]);
dispatch_thread.alert_pipe[1] = -1;
}
if (!ast_rwlock_trywrlock(&init_cpg_lock)) {
ast_debug(5, "cleanup_module wrlock\n");
if (cpg_handle && (cs_err = cpg_finalize(cpg_handle)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to finalize cpg (%d)\n", (int) cs_err);
}
cpg_handle = 0;
if (cfg_handle && (cs_err = corosync_cfg_finalize(cfg_handle)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to finalize cfg (%d)\n", (int) cs_err);
}
cfg_handle = 0;
corosync_node_joined = 0;
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "cleanup_module unlock\n");
}
ao2_cleanup(nodes);
nodes = NULL;
}
static int load_module(void)
{
cs_error_t cs_err;
struct cpg_name name;
if (ast_eid_is_empty(&ast_eid_default)) {
ast_log(LOG_ERROR, "Entity ID is not set.\n");
return AST_MODULE_LOAD_DECLINE;
}
nodes = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_MUTEX, 0, 23,
corosync_node_hash_fn, NULL, corosync_node_cmp_fn);
if (!nodes) {
goto failed;
}
corosync_aggregate_topic = stasis_topic_create("corosync:aggregator");
if (!corosync_aggregate_topic) {
ast_log(AST_LOG_ERROR, "Failed to create stasis topic for corosync\n");
goto failed;
}
stasis_router = stasis_message_router_create(corosync_aggregate_topic);
if (!stasis_router) {
ast_log(AST_LOG_ERROR, "Failed to create message router for corosync topic\n");
goto failed;
}
stasis_message_router_set_congestion_limits(stasis_router, -1,
10 * AST_TASKPROCESSOR_HIGH_WATER_LEVEL);
if (STASIS_MESSAGE_TYPE_INIT(corosync_ping_message_type) != 0) {
ast_log(AST_LOG_ERROR, "Failed to initialize corosync ping message type\n");
goto failed;
}
if (load_config(0)) {
/* simply not configured is not a fatal error */
goto failed;
}
if (!ast_rwlock_trywrlock(&init_cpg_lock)) {
corosync_node_joined = 0;
ast_debug(5, "load_module wrlock\n");
if ((cs_err = corosync_cfg_initialize(&cfg_handle, &cfg_callbacks)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to initialize cfg: (%d)\n", (int) cs_err);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "load_module unlock\n");
goto failed;
}
if ((cs_err = cpg_initialize(&cpg_handle, &cpg_callbacks)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to initialize cpg: (%d)\n", (int) cs_err);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "load_module unlock\n");
goto failed;
}
ast_copy_string(name.value, "asterisk", sizeof(name.value));
name.length = strlen(name.value);
if ((cs_err = cpg_join(cpg_handle, &name)) != CS_OK) {
ast_log(LOG_ERROR, "Failed to join: (%d)\n", (int) cs_err);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "load_module unlock\n");
goto failed;
}
if (pipe(dispatch_thread.alert_pipe) == -1) {
ast_log(LOG_ERROR, "Failed to create alert pipe: %s (%d)\n",
strerror(errno), errno);
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "load_module unlock\n");
goto failed;
}
corosync_node_joined = 1;
ast_rwlock_unlock(&init_cpg_lock);
ast_debug(5, "load_module unlock\n");
if (corosync_pthread_create_background(&dispatch_thread.id, NULL,
dispatch_thread_handler, NULL)) {
ast_log(LOG_ERROR, "Error starting CPG dispatch thread.\n");
goto failed;
}
ast_cli_register_multiple(corosync_cli, ARRAY_LEN(corosync_cli));
} else {
goto failed;
}
return AST_MODULE_LOAD_SUCCESS;
failed:
cleanup_module();
return AST_MODULE_LOAD_DECLINE;
}
static int unload_module(void)
{
ast_cli_unregister_multiple(corosync_cli, ARRAY_LEN(corosync_cli));
cleanup_module();
return 0;
}
AST_MODULE_INFO_STANDARD_EXTENDED(ASTERISK_GPL_KEY, "Corosync");
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