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diff --git a/libknet/threads_heartbeat.c b/libknet/threads_heartbeat.c
index 65a8aece..ab9f2bcf 100644
--- a/libknet/threads_heartbeat.c
+++ b/libknet/threads_heartbeat.c
@@ -1,238 +1,240 @@
/*
* Copyright (C) 2015-2020 Red Hat, Inc. All rights reserved.
*
* Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
* Federico Simoncelli <fsimon@kronosnet.org>
*
* This software licensed under LGPL-2.0+
*/
#include "config.h"
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <time.h>
#include "crypto.h"
#include "links.h"
#include "logging.h"
#include "transports.h"
#include "threads_common.h"
#include "threads_heartbeat.h"
static void _link_down(knet_handle_t knet_h, struct knet_host *dst_host, struct knet_link *dst_link)
{
memset(&dst_link->pmtud_last, 0, sizeof(struct timespec));
dst_link->received_pong = 0;
dst_link->status.pong_last.tv_nsec = 0;
dst_link->pong_timeout_backoff = KNET_LINK_PONG_TIMEOUT_BACKOFF;
if (dst_link->status.connected == 1) {
log_info(knet_h, KNET_SUB_LINK, "host: %u link: %u is down",
dst_host->host_id, dst_link->link_id);
_link_updown(knet_h, dst_host->host_id, dst_link->link_id, dst_link->status.enabled, 0, 1);
}
}
static void _handle_check_each(knet_handle_t knet_h, struct knet_host *dst_host, struct knet_link *dst_link, int timed)
{
int err = 0, savederrno = 0, stats_err = 0;
int len;
ssize_t outlen = KNET_HEADER_PING_SIZE;
struct timespec clock_now, pong_last;
unsigned long long diff_ping;
unsigned char *outbuf = (unsigned char *)knet_h->pingbuf;
if (dst_link->transport_connected == 0) {
_link_down(knet_h, dst_host, dst_link);
return;
}
/* caching last pong to avoid race conditions */
pong_last = dst_link->status.pong_last;
if (clock_gettime(CLOCK_MONOTONIC, &clock_now) != 0) {
log_debug(knet_h, KNET_SUB_HEARTBEAT, "Unable to get monotonic clock");
return;
}
timespec_diff(dst_link->ping_last, clock_now, &diff_ping);
if ((diff_ping >= (dst_link->ping_interval * 1000llu)) || (!timed)) {
memmove(&knet_h->pingbuf->khp_ping_time[0], &clock_now, sizeof(struct timespec));
knet_h->pingbuf->khp_ping_link = dst_link->link_id;
if (pthread_mutex_lock(&knet_h->tx_seq_num_mutex)) {
log_debug(knet_h, KNET_SUB_HEARTBEAT, "Unable to get seq mutex lock");
return;
}
knet_h->pingbuf->khp_ping_seq_num = htons(knet_h->tx_seq_num);
pthread_mutex_unlock(&knet_h->tx_seq_num_mutex);
knet_h->pingbuf->khp_ping_timed = timed;
if (knet_h->crypto_in_use_config) {
if (crypto_encrypt_and_sign(knet_h,
(const unsigned char *)knet_h->pingbuf,
outlen,
knet_h->pingbuf_crypt,
&outlen) < 0) {
log_debug(knet_h, KNET_SUB_HEARTBEAT, "Unable to crypto ping packet");
return;
}
outbuf = knet_h->pingbuf_crypt;
if (pthread_mutex_lock(&knet_h->handle_stats_mutex) < 0) {
log_err(knet_h, KNET_SUB_HEARTBEAT, "Unable to get mutex lock");
return;
}
knet_h->stats_extra.tx_crypt_ping_packets++;
pthread_mutex_unlock(&knet_h->handle_stats_mutex);
}
stats_err = pthread_mutex_lock(&dst_link->link_stats_mutex);
if (stats_err) {
log_err(knet_h, KNET_SUB_HEARTBEAT, "Unable to get stats mutex lock for host %u link %u: %s",
dst_host->host_id, dst_link->link_id, strerror(stats_err));
return;
}
retry:
- if (transport_get_connection_oriented(knet_h, dst_link->transport) == TRANSPORT_PROTO_NOT_CONNECTION_ORIENTED) {
- len = sendto(dst_link->outsock, outbuf, outlen, MSG_DONTWAIT | MSG_NOSIGNAL,
- (struct sockaddr *) &dst_link->dst_addr, sizeof(struct sockaddr_storage));
- } else {
- len = sendto(dst_link->outsock, outbuf, outlen, MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0);
- }
- savederrno = errno;
-
- dst_link->ping_last = clock_now;
- dst_link->status.stats.tx_ping_packets++;
- dst_link->status.stats.tx_ping_bytes += outlen;
-
- if (len != outlen) {
- err = transport_tx_sock_error(knet_h, dst_link->transport, dst_link->outsock, len, savederrno);
- switch(err) {
- case -1: /* unrecoverable error */
- log_debug(knet_h, KNET_SUB_HEARTBEAT,
- "Unable to send ping (sock: %d) packet (sendto): %d %s. recorded src ip: %s src port: %s dst ip: %s dst port: %s",
- dst_link->outsock, savederrno, strerror(savederrno),
- dst_link->status.src_ipaddr, dst_link->status.src_port,
- dst_link->status.dst_ipaddr, dst_link->status.dst_port);
- dst_link->status.stats.tx_ping_errors++;
- break;
- case 0:
- break;
- case 1:
- dst_link->status.stats.tx_ping_retries++;
- goto retry;
- break;
+ if (dst_link->transport_connected) {
+ if (transport_get_connection_oriented(knet_h, dst_link->transport) == TRANSPORT_PROTO_NOT_CONNECTION_ORIENTED) {
+ len = sendto(dst_link->outsock, outbuf, outlen, MSG_DONTWAIT | MSG_NOSIGNAL,
+ (struct sockaddr *) &dst_link->dst_addr, sizeof(struct sockaddr_storage));
+ } else {
+ len = sendto(dst_link->outsock, outbuf, outlen, MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0);
+ }
+ savederrno = errno;
+
+ dst_link->ping_last = clock_now;
+ dst_link->status.stats.tx_ping_packets++;
+ dst_link->status.stats.tx_ping_bytes += outlen;
+
+ if (len != outlen) {
+ err = transport_tx_sock_error(knet_h, dst_link->transport, dst_link->outsock, len, savederrno);
+ switch(err) {
+ case -1: /* unrecoverable error */
+ log_debug(knet_h, KNET_SUB_HEARTBEAT,
+ "Unable to send ping (sock: %d) packet (sendto): %d %s. recorded src ip: %s src port: %s dst ip: %s dst port: %s",
+ dst_link->outsock, savederrno, strerror(savederrno),
+ dst_link->status.src_ipaddr, dst_link->status.src_port,
+ dst_link->status.dst_ipaddr, dst_link->status.dst_port);
+ dst_link->status.stats.tx_ping_errors++;
+ break;
+ case 0:
+ break;
+ case 1:
+ dst_link->status.stats.tx_ping_retries++;
+ goto retry;
+ break;
+ }
+ } else {
+ dst_link->last_ping_size = outlen;
}
- } else {
- dst_link->last_ping_size = outlen;
}
pthread_mutex_unlock(&dst_link->link_stats_mutex);
}
timespec_diff(pong_last, clock_now, &diff_ping);
if ((pong_last.tv_nsec) &&
(diff_ping >= (dst_link->pong_timeout_adj * 1000llu))) {
_link_down(knet_h, dst_host, dst_link);
}
}
void _send_pings(knet_handle_t knet_h, int timed)
{
struct knet_host *dst_host;
int link_idx;
if (pthread_mutex_lock(&knet_h->hb_mutex)) {
log_debug(knet_h, KNET_SUB_HEARTBEAT, "Unable to get hb mutex lock");
return;
}
for (dst_host = knet_h->host_head; dst_host != NULL; dst_host = dst_host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
if ((dst_host->link[link_idx].status.enabled != 1) ||
(dst_host->link[link_idx].transport == KNET_TRANSPORT_LOOPBACK ) ||
((dst_host->link[link_idx].dynamic == KNET_LINK_DYNIP) &&
(dst_host->link[link_idx].status.dynconnected != 1)))
continue;
_handle_check_each(knet_h, dst_host, &dst_host->link[link_idx], timed);
}
}
pthread_mutex_unlock(&knet_h->hb_mutex);
}
static void _adjust_pong_timeouts(knet_handle_t knet_h)
{
struct knet_host *dst_host;
struct knet_link *dst_link;
int link_idx;
if (pthread_mutex_lock(&knet_h->backoff_mutex)) {
log_debug(knet_h, KNET_SUB_HEARTBEAT, "Unable to get backoff_mutex");
return;
}
for (dst_host = knet_h->host_head; dst_host != NULL; dst_host = dst_host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
if ((dst_host->link[link_idx].status.enabled != 1) ||
(dst_host->link[link_idx].transport == KNET_TRANSPORT_LOOPBACK ) ||
((dst_host->link[link_idx].dynamic == KNET_LINK_DYNIP) &&
(dst_host->link[link_idx].status.dynconnected != 1)))
continue;
dst_link = &dst_host->link[link_idx];
if (dst_link->pong_timeout_backoff > 1) {
dst_link->pong_timeout_backoff--;
}
dst_link->pong_timeout_adj = (dst_link->pong_timeout * dst_link->pong_timeout_backoff) + (dst_link->status.stats.latency_ave * KNET_LINK_PONG_TIMEOUT_LAT_MUL);
}
}
pthread_mutex_unlock(&knet_h->backoff_mutex);
}
void *_handle_heartbt_thread(void *data)
{
knet_handle_t knet_h = (knet_handle_t) data;
int i = 1;
set_thread_status(knet_h, KNET_THREAD_HB, KNET_THREAD_STARTED);
/* preparing ping buffer */
knet_h->pingbuf->kh_version = KNET_HEADER_VERSION;
knet_h->pingbuf->kh_type = KNET_HEADER_TYPE_PING;
knet_h->pingbuf->kh_node = htons(knet_h->host_id);
while (!shutdown_in_progress(knet_h)) {
usleep(knet_h->threads_timer_res);
if (pthread_rwlock_rdlock(&knet_h->global_rwlock) != 0) {
log_debug(knet_h, KNET_SUB_HEARTBEAT, "Unable to get read lock");
continue;
}
/*
* _adjust_pong_timeouts should execute approx once a second.
*/
if ((i % (1000000 / knet_h->threads_timer_res)) == 0) {
_adjust_pong_timeouts(knet_h);
i = 1;
} else {
i++;
}
_send_pings(knet_h, 1);
pthread_rwlock_unlock(&knet_h->global_rwlock);
}
set_thread_status(knet_h, KNET_THREAD_HB, KNET_THREAD_STOPPED);
return NULL;
}

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