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diff --git a/libknet/crypto.c b/libknet/crypto.c
index 93d54450..ca1f3234 100644
--- a/libknet/crypto.c
+++ b/libknet/crypto.c
@@ -1,457 +1,457 @@
/*
* Copyright (C) 2012-2022 Red Hat, Inc. All rights reserved.
*
* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under LGPL-2.0+
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <time.h>
#include "crypto.h"
#include "crypto_model.h"
#include "internals.h"
#include "logging.h"
#include "common.h"
/*
* internal module switch data
*/
static crypto_model_t crypto_modules_cmds[] = {
{ "nss", WITH_CRYPTO_NSS, 0, NULL },
{ "openssl", WITH_CRYPTO_OPENSSL, 0, NULL },
{ "gcrypt", WITH_CRYPTO_GCRYPT, 0, NULL },
{ NULL, 0, 0, NULL }
};
static int crypto_get_model(const char *model)
{
int idx = 0;
while (crypto_modules_cmds[idx].model_name != NULL) {
if (!strcmp(crypto_modules_cmds[idx].model_name, model))
return idx;
idx++;
}
return -1;
}
/*
* exported API
*/
int crypto_encrypt_and_sign (
knet_handle_t knet_h,
const unsigned char *buf_in,
const ssize_t buf_in_len,
unsigned char *buf_out,
ssize_t *buf_out_len)
{
return crypto_modules_cmds[knet_h->crypto_instance[knet_h->crypto_in_use_config]->model].ops->crypt(knet_h, knet_h->crypto_instance[knet_h->crypto_in_use_config], buf_in, buf_in_len, buf_out, buf_out_len);
}
int crypto_encrypt_and_signv (
knet_handle_t knet_h,
const struct iovec *iov_in,
int iovcnt_in,
unsigned char *buf_out,
ssize_t *buf_out_len)
{
return crypto_modules_cmds[knet_h->crypto_instance[knet_h->crypto_in_use_config]->model].ops->cryptv(knet_h, knet_h->crypto_instance[knet_h->crypto_in_use_config], iov_in, iovcnt_in, buf_out, buf_out_len);
}
int crypto_authenticate_and_decrypt (
knet_handle_t knet_h,
const unsigned char *buf_in,
const ssize_t buf_in_len,
unsigned char *buf_out,
ssize_t *buf_out_len)
{
int i, err = 0;
int multiple_configs = 0;
uint8_t log_level = KNET_LOG_ERR;
for (i = 1; i <= KNET_MAX_CRYPTO_INSTANCES; i++) {
if (knet_h->crypto_instance[i]) {
multiple_configs++;
}
}
/*
* attempt to decrypt first with the in-use config
* to avoid excessive performance hit.
*/
if (multiple_configs > 1) {
log_level = KNET_LOG_DEBUG;
}
if (knet_h->crypto_in_use_config) {
err = crypto_modules_cmds[knet_h->crypto_instance[knet_h->crypto_in_use_config]->model].ops->decrypt(knet_h, knet_h->crypto_instance[knet_h->crypto_in_use_config], buf_in, buf_in_len, buf_out, buf_out_len, log_level);
} else {
err = -1;
}
/*
* if we fail, try to use the other configurations
*/
if (err) {
for (i = 1; i <= KNET_MAX_CRYPTO_INSTANCES; i++) {
/*
* in-use config was already attempted
*/
if (i == knet_h->crypto_in_use_config) {
continue;
}
if (knet_h->crypto_instance[i]) {
log_debug(knet_h, KNET_SUB_CRYPTO, "Alternative crypto configuration found, attempting to decrypt with config %u", i);
err = crypto_modules_cmds[knet_h->crypto_instance[i]->model].ops->decrypt(knet_h, knet_h->crypto_instance[i], buf_in, buf_in_len, buf_out, buf_out_len, KNET_LOG_ERR);
if (!err) {
errno = 0; /* clear errno from previous failures */
return err;
}
log_debug(knet_h, KNET_SUB_CRYPTO, "Packet failed to decrypt with crypto config %u", i);
}
}
}
return err;
}
static int crypto_use_config(
knet_handle_t knet_h,
uint8_t config_num)
{
if ((config_num) && (!knet_h->crypto_instance[config_num])) {
errno = EINVAL;
return -1;
}
knet_h->crypto_in_use_config = config_num;
if (config_num) {
knet_h->sec_block_size = knet_h->crypto_instance[config_num]->sec_block_size;
knet_h->sec_hash_size = knet_h->crypto_instance[config_num]->sec_hash_size;
knet_h->sec_salt_size = knet_h->crypto_instance[config_num]->sec_salt_size;
} else {
knet_h->sec_block_size = 0;
knet_h->sec_hash_size = 0;
knet_h->sec_salt_size = 0;
}
- force_pmtud_run(knet_h, KNET_SUB_CRYPTO, 1);
+ force_pmtud_run(knet_h, KNET_SUB_CRYPTO, 1, 0);
return 0;
}
static int crypto_init(
knet_handle_t knet_h,
struct knet_handle_crypto_cfg *knet_handle_crypto_cfg,
uint8_t config_num)
{
int err = 0, savederrno = 0;
int model = 0;
struct crypto_instance *current = NULL, *new = NULL;
current = knet_h->crypto_instance[config_num];
model = crypto_get_model(knet_handle_crypto_cfg->crypto_model);
if (model < 0) {
log_err(knet_h, KNET_SUB_CRYPTO, "model %s not supported", knet_handle_crypto_cfg->crypto_model);
return -1;
}
if (crypto_modules_cmds[model].built_in == 0) {
log_err(knet_h, KNET_SUB_CRYPTO, "this version of libknet was built without %s support. Please contact your vendor or fix the build.", knet_handle_crypto_cfg->crypto_model);
return -1;
}
savederrno = pthread_rwlock_wrlock(&shlib_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_CRYPTO, "Unable to get write lock: %s",
strerror(savederrno));
return -1;
}
if (!crypto_modules_cmds[model].loaded) {
crypto_modules_cmds[model].ops = load_module (knet_h, "crypto", crypto_modules_cmds[model].model_name);
if (!crypto_modules_cmds[model].ops) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_CRYPTO, "Unable to load %s lib", crypto_modules_cmds[model].model_name);
goto out;
}
if (crypto_modules_cmds[model].ops->abi_ver != KNET_CRYPTO_MODEL_ABI) {
savederrno = EINVAL;
err = -1;
log_err(knet_h, KNET_SUB_CRYPTO,
"ABI mismatch loading module %s. knet ver: %d, module ver: %d",
crypto_modules_cmds[model].model_name, KNET_CRYPTO_MODEL_ABI,
crypto_modules_cmds[model].ops->abi_ver);
goto out;
}
crypto_modules_cmds[model].loaded = 1;
}
log_debug(knet_h, KNET_SUB_CRYPTO,
"Initializing crypto module [%s/%s/%s]",
knet_handle_crypto_cfg->crypto_model,
knet_handle_crypto_cfg->crypto_cipher_type,
knet_handle_crypto_cfg->crypto_hash_type);
new = malloc(sizeof(struct crypto_instance));
if (!new) {
savederrno = ENOMEM;
err = -1;
log_err(knet_h, KNET_SUB_CRYPTO, "Unable to allocate memory for crypto instance");
goto out;
}
/*
* if crypto_modules_cmds.ops->init fails, it is expected that
* it will clean everything by itself.
* crypto_modules_cmds.ops->fini is not invoked on error.
*/
new->model = model;
if (crypto_modules_cmds[model].ops->init(knet_h, new, knet_handle_crypto_cfg)) {
savederrno = errno;
err = -1;
goto out;
}
out:
if (!err) {
knet_h->crypto_instance[config_num] = new;
if (current) {
/*
* if we are replacing the current config, we need to enable it right away
*/
if (knet_h->crypto_in_use_config == config_num) {
crypto_use_config(knet_h, config_num);
}
if (crypto_modules_cmds[current->model].ops->fini != NULL) {
crypto_modules_cmds[current->model].ops->fini(knet_h, current);
}
free(current);
}
} else {
if (new) {
free(new);
}
}
pthread_rwlock_unlock(&shlib_rwlock);
errno = err ? savederrno : 0;
return err;
}
static void crypto_fini_config(
knet_handle_t knet_h,
uint8_t config_num)
{
if (knet_h->crypto_instance[config_num]) {
if (crypto_modules_cmds[knet_h->crypto_instance[config_num]->model].ops->fini != NULL) {
crypto_modules_cmds[knet_h->crypto_instance[config_num]->model].ops->fini(knet_h, knet_h->crypto_instance[config_num]);
}
free(knet_h->crypto_instance[config_num]);
knet_h->crypto_instance[config_num] = NULL;
}
}
void crypto_fini(
knet_handle_t knet_h,
uint8_t config_num)
{
int savederrno = 0, i;
savederrno = pthread_rwlock_wrlock(&shlib_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_CRYPTO, "Unable to get write lock: %s",
strerror(savederrno));
return;
}
if (config_num > KNET_MAX_CRYPTO_INSTANCES) {
for (i = 1; i <= KNET_MAX_CRYPTO_INSTANCES; i++) {
crypto_fini_config(knet_h, i);
}
} else {
crypto_fini_config(knet_h, config_num);
}
pthread_rwlock_unlock(&shlib_rwlock);
return;
}
int knet_handle_crypto_set_config(knet_handle_t knet_h,
struct knet_handle_crypto_cfg *knet_handle_crypto_cfg,
uint8_t config_num)
{
int savederrno = 0;
int err = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (!knet_handle_crypto_cfg) {
errno = EINVAL;
return -1;
}
if ((config_num < 1) || (config_num > KNET_MAX_CRYPTO_INSTANCES)) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
if (knet_h->crypto_in_use_config == config_num) {
savederrno = EBUSY;
err = -1;
goto exit_unlock;
}
if ((!strncmp("none", knet_handle_crypto_cfg->crypto_model, 4)) ||
((!strncmp("none", knet_handle_crypto_cfg->crypto_cipher_type, 4)) &&
(!strncmp("none", knet_handle_crypto_cfg->crypto_hash_type, 4)))) {
crypto_fini(knet_h, config_num);
log_debug(knet_h, KNET_SUB_CRYPTO, "crypto config %u is not enabled", config_num);
err = 0;
goto exit_unlock;
}
if (knet_handle_crypto_cfg->private_key_len < KNET_MIN_KEY_LEN) {
log_debug(knet_h, KNET_SUB_CRYPTO, "private key len too short for config %u (min %d): %u",
config_num, KNET_MIN_KEY_LEN, knet_handle_crypto_cfg->private_key_len);
savederrno = EINVAL;
err = -1;
goto exit_unlock;
}
if (knet_handle_crypto_cfg->private_key_len > KNET_MAX_KEY_LEN) {
log_debug(knet_h, KNET_SUB_CRYPTO, "private key len too long for config %u (max %d): %u",
config_num, KNET_MAX_KEY_LEN, knet_handle_crypto_cfg->private_key_len);
savederrno = EINVAL;
err = -1;
goto exit_unlock;
}
err = crypto_init(knet_h, knet_handle_crypto_cfg, config_num);
if (err) {
err = -2;
savederrno = errno;
}
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_handle_crypto_rx_clear_traffic(knet_handle_t knet_h,
uint8_t value)
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (value > KNET_CRYPTO_RX_DISALLOW_CLEAR_TRAFFIC) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
knet_h->crypto_only = value;
if (knet_h->crypto_only) {
log_debug(knet_h, KNET_SUB_CRYPTO, "Only crypto traffic allowed for RX");
} else {
log_debug(knet_h, KNET_SUB_CRYPTO, "Both crypto and clear traffic allowed for RX");
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
return 0;
}
int knet_handle_crypto_use_config(knet_handle_t knet_h,
uint8_t config_num)
{
int savederrno = 0;
int err = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (config_num > KNET_MAX_CRYPTO_INSTANCES) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
err = crypto_use_config(knet_h, config_num);
savederrno = errno;
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_get_crypto_list(struct knet_crypto_info *crypto_list, size_t *crypto_list_entries)
{
int err = 0;
int idx = 0;
int outidx = 0;
if (!crypto_list_entries) {
errno = EINVAL;
return -1;
}
while (crypto_modules_cmds[idx].model_name != NULL) {
if (crypto_modules_cmds[idx].built_in) {
if (crypto_list) {
crypto_list[outidx].name = crypto_modules_cmds[idx].model_name;
}
outidx++;
}
idx++;
}
*crypto_list_entries = outidx;
if (!err)
errno = 0;
return err;
}
diff --git a/libknet/links.c b/libknet/links.c
index 88471132..bad2e057 100644
--- a/libknet/links.c
+++ b/libknet/links.c
@@ -1,1568 +1,1572 @@
/*
* Copyright (C) 2012-2022 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 <errno.h>
#include <netdb.h>
#include <string.h>
#include <pthread.h>
#include "netutils.h"
#include "internals.h"
#include "logging.h"
#include "links.h"
#include "transports.h"
#include "host.h"
#include "threads_common.h"
#include "links_acl.h"
int _link_updown(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
unsigned int enabled, unsigned int connected, unsigned int lock_stats)
{
struct knet_host *host = knet_h->host_index[host_id];
struct knet_link *link = &host->link[link_id];
int notify_status = link->status.connected;
int savederrno = 0;
if ((link->status.enabled == enabled) &&
(link->status.connected == connected))
return 0;
if ((link->status.enabled) &&
(knet_h->link_status_change_notify_fn)) {
if (link->status.connected != connected) {
notify_status = connected; /* connection state */
}
if (!enabled) {
notify_status = 0; /* disable == disconnected */
}
knet_h->link_status_change_notify_fn(
knet_h->link_status_change_notify_fn_private_data,
host_id,
link_id,
notify_status,
host->status.remote,
host->status.external);
}
link->status.enabled = enabled;
link->status.connected = connected;
_host_dstcache_update_async(knet_h, host);
if ((link->status.dynconnected) &&
(!link->status.connected)) {
link->status.dynconnected = 0;
}
if (!connected) {
transport_link_is_down(knet_h, link);
+ } else {
+ /* Reset MTU in case new link can't use full line MTU */
+ log_info(knet_h, KNET_SUB_LINK, "Resetting MTU for link %u because host %u joined", link_id, host_id);
+ force_pmtud_run(knet_h, KNET_SUB_LINK, 1, 1);
}
if (lock_stats) {
savederrno = pthread_mutex_lock(&link->link_stats_mutex);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get stats mutex lock for host %u link %u: %s",
host_id, link_id, strerror(savederrno));
errno = savederrno;
return -1;
}
}
if (connected) {
time(&link->status.stats.last_up_times[link->status.stats.last_up_time_index]);
link->status.stats.up_count++;
if (++link->status.stats.last_up_time_index >= MAX_LINK_EVENTS) {
link->status.stats.last_up_time_index = 0;
}
} else {
time(&link->status.stats.last_down_times[link->status.stats.last_down_time_index]);
link->status.stats.down_count++;
if (++link->status.stats.last_down_time_index >= MAX_LINK_EVENTS) {
link->status.stats.last_down_time_index = 0;
}
}
if (lock_stats) {
pthread_mutex_unlock(&link->link_stats_mutex);
}
return 0;
}
void _link_clear_stats(knet_handle_t knet_h)
{
struct knet_host *host;
struct knet_link *link;
uint32_t host_id;
uint8_t link_id;
for (host_id = 0; host_id < KNET_MAX_HOST; host_id++) {
host = knet_h->host_index[host_id];
if (!host) {
continue;
}
for (link_id = 0; link_id < KNET_MAX_LINK; link_id++) {
link = &host->link[link_id];
memset(&link->status.stats, 0, sizeof(struct knet_link_stats));
}
}
}
int knet_link_set_config(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t transport,
struct sockaddr_storage *src_addr,
struct sockaddr_storage *dst_addr,
uint64_t flags)
{
int savederrno = 0, err = 0, i, wipelink = 0, link_idx;
struct knet_host *host, *tmp_host;
struct knet_link *link = NULL;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!src_addr) {
errno = EINVAL;
return -1;
}
if (dst_addr && (src_addr->ss_family != dst_addr->ss_family)) {
log_err(knet_h, KNET_SUB_LINK, "Source address family does not match destination address family");
errno = EINVAL;
return -1;
}
if (transport >= KNET_MAX_TRANSPORTS) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
if (transport == KNET_TRANSPORT_LOOPBACK && knet_h->host_id != host_id) {
log_err(knet_h, KNET_SUB_LINK, "Cannot create loopback link to remote node");
err = -1;
savederrno = EINVAL;
goto exit_unlock;
}
if (knet_h->host_id == host_id && knet_h->has_loop_link) {
log_err(knet_h, KNET_SUB_LINK, "Cannot create more than 1 link when loopback is active");
err = -1;
savederrno = EINVAL;
goto exit_unlock;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
if (transport == KNET_TRANSPORT_LOOPBACK && knet_h->host_id == host_id) {
for (i=0; i<KNET_MAX_LINK; i++) {
if (host->link[i].configured) {
log_err(knet_h, KNET_SUB_LINK, "Cannot add loopback link when other links are already configured.");
err = -1;
savederrno = EINVAL;
goto exit_unlock;
}
}
}
link = &host->link[link_id];
if (link->configured != 0) {
err =-1;
savederrno = EBUSY;
log_err(knet_h, KNET_SUB_LINK, "Host %u link %u is currently configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
if (link->status.enabled != 0) {
err =-1;
savederrno = EBUSY;
log_err(knet_h, KNET_SUB_LINK, "Host %u link %u is currently in use: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
/*
* errors happening after this point should trigger
* a memset of the link
*/
wipelink = 1;
copy_sockaddr(&link->src_addr, src_addr);
err = knet_addrtostr(src_addr, sizeof(struct sockaddr_storage),
link->status.src_ipaddr, KNET_MAX_HOST_LEN,
link->status.src_port, KNET_MAX_PORT_LEN);
if (err) {
if (err == EAI_SYSTEM) {
savederrno = errno;
log_warn(knet_h, KNET_SUB_LINK,
"Unable to resolve host: %u link: %u source addr/port: %s",
host_id, link_id, strerror(savederrno));
} else {
savederrno = EINVAL;
log_warn(knet_h, KNET_SUB_LINK,
"Unable to resolve host: %u link: %u source addr/port: %s",
host_id, link_id, gai_strerror(err));
}
err = -1;
goto exit_unlock;
}
if (!dst_addr) {
link->dynamic = KNET_LINK_DYNIP;
} else {
link->dynamic = KNET_LINK_STATIC;
copy_sockaddr(&link->dst_addr, dst_addr);
err = knet_addrtostr(dst_addr, sizeof(struct sockaddr_storage),
link->status.dst_ipaddr, KNET_MAX_HOST_LEN,
link->status.dst_port, KNET_MAX_PORT_LEN);
if (err) {
if (err == EAI_SYSTEM) {
savederrno = errno;
log_warn(knet_h, KNET_SUB_LINK,
"Unable to resolve host: %u link: %u destination addr/port: %s",
host_id, link_id, strerror(savederrno));
} else {
savederrno = EINVAL;
log_warn(knet_h, KNET_SUB_LINK,
"Unable to resolve host: %u link: %u destination addr/port: %s",
host_id, link_id, gai_strerror(err));
}
err = -1;
goto exit_unlock;
}
}
link->pmtud_crypto_timeout_multiplier = KNET_LINK_PMTUD_CRYPTO_TIMEOUT_MULTIPLIER_MIN;
link->pong_count = KNET_LINK_DEFAULT_PONG_COUNT;
link->has_valid_mtu = 0;
link->ping_interval = KNET_LINK_DEFAULT_PING_INTERVAL * 1000; /* microseconds */
link->pong_timeout = KNET_LINK_DEFAULT_PING_TIMEOUT * 1000; /* microseconds */
link->pong_timeout_backoff = KNET_LINK_PONG_TIMEOUT_BACKOFF;
link->pong_timeout_adj = link->pong_timeout * link->pong_timeout_backoff; /* microseconds */
link->latency_max_samples = KNET_LINK_DEFAULT_PING_PRECISION;
link->status.stats.latency_samples = 0;
link->flags = flags;
/*
* check for DYNIP vs STATIC collisions.
* example: link0 is static, user attempts to configure link1 as dynamic with the same source
* address/port.
* This configuration is invalid and would cause ACL collisions.
*/
for (tmp_host = knet_h->host_head; tmp_host != NULL; tmp_host = tmp_host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
if (&tmp_host->link[link_idx] == link)
continue;
if ((!memcmp(&tmp_host->link[link_idx].src_addr, &link->src_addr, sizeof(struct sockaddr_storage))) &&
(tmp_host->link[link_idx].dynamic != link->dynamic)) {
savederrno = EINVAL;
err = -1;
log_err(knet_h, KNET_SUB_LINK, "Failed to configure host %u link %u dyn %u. Conflicts with host %u link %u dyn %u: %s",
host_id, link_id, link->dynamic, tmp_host->host_id, link_idx, tmp_host->link[link_idx].dynamic, strerror(savederrno));
goto exit_unlock;
}
}
}
savederrno = pthread_mutex_init(&link->link_stats_mutex, NULL);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to initialize link stats mutex: %s", strerror(savederrno));
err = -1;
goto exit_unlock;
}
if (transport_link_set_config(knet_h, link, transport) < 0) {
savederrno = errno;
err = -1;
goto exit_transport_err;
}
/*
* we can only configure default access lists if we know both endpoints
* and the protocol uses GENERIC_ACL, otherwise the protocol has
* to setup their own access lists above in transport_link_set_config.
*/
if ((transport_get_acl_type(knet_h, transport) == USE_GENERIC_ACL) &&
(link->dynamic == KNET_LINK_STATIC)) {
log_debug(knet_h, KNET_SUB_LINK, "Configuring default access lists for host: %u link: %u socket: %d",
host_id, link_id, link->outsock);
if ((check_add(knet_h, link, -1,
&link->dst_addr, &link->dst_addr,
CHECK_TYPE_ADDRESS, CHECK_ACCEPT) < 0) && (errno != EEXIST)) {
log_warn(knet_h, KNET_SUB_LINK, "Failed to configure default access lists for host: %u link: %u", host_id, link_id);
savederrno = errno;
err = -1;
goto exit_acl_error;
}
}
/*
* no errors should happen after link is configured
*/
link->configured = 1;
log_debug(knet_h, KNET_SUB_LINK, "host: %u link: %u is configured",
host_id, link_id);
if (transport == KNET_TRANSPORT_LOOPBACK) {
knet_h->has_loop_link = 1;
knet_h->loop_link = link_id;
host->status.reachable = 1;
link->status.mtu = KNET_PMTUD_SIZE_V6;
} else {
/*
* calculate the minimum MTU that is safe to use,
* based on RFCs and that each network device should
* be able to support without any troubles
*/
if (link->dynamic == KNET_LINK_STATIC) {
/*
* with static link we can be more precise than using
* the generic calc_min_mtu()
*/
switch (link->dst_addr.ss_family) {
case AF_INET6:
link->status.mtu = calc_max_data_outlen(knet_h, KNET_PMTUD_MIN_MTU_V6 - (KNET_PMTUD_OVERHEAD_V6 + link->proto_overhead));
break;
case AF_INET:
link->status.mtu = calc_max_data_outlen(knet_h, KNET_PMTUD_MIN_MTU_V4 - (KNET_PMTUD_OVERHEAD_V4 + link->proto_overhead));
break;
}
} else {
/*
* for dynamic links we start with the minimum MTU
* possible and PMTUd will kick in immediately
* after connection status is 1
*/
link->status.mtu = calc_min_mtu(knet_h);
}
link->has_valid_mtu = 1;
}
exit_acl_error:
/*
* if creating access lists has error, we only need to clean
* the transport and the stuff below.
*/
if (err < 0) {
if ((transport_link_clear_config(knet_h, link) < 0) &&
(errno != EBUSY)) {
log_warn(knet_h, KNET_SUB_LINK, "Failed to deconfigure transport for host %u link %u: %s", host_id, link_id, strerror(errno));
}
}
exit_transport_err:
/*
* if transport has errors, transport will clean after itself
* and we only need to clean the mutex
*/
if (err < 0) {
pthread_mutex_destroy(&link->link_stats_mutex);
}
exit_unlock:
/*
* re-init the link on error
*/
if ((err < 0) && (wipelink)) {
memset(link, 0, sizeof(struct knet_link));
link->link_id = link_id;
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_get_config(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t *transport,
struct sockaddr_storage *src_addr,
struct sockaddr_storage *dst_addr,
uint8_t *dynamic,
uint64_t *flags)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!src_addr) {
errno = EINVAL;
return -1;
}
if (!dynamic) {
errno = EINVAL;
return -1;
}
if (!transport) {
errno = EINVAL;
return -1;
}
if (!flags) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
if ((link->dynamic == KNET_LINK_STATIC) && (!dst_addr)) {
savederrno = EINVAL;
err = -1;
goto exit_unlock;
}
memmove(src_addr, &link->src_addr, sockaddr_len(&link->src_addr));
*transport = link->transport;
*flags = link->flags;
if (link->dynamic == KNET_LINK_STATIC) {
*dynamic = 0;
memmove(dst_addr, &link->dst_addr, sockaddr_len(&link->dst_addr));
} else {
*dynamic = 1;
}
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_clear_config(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
int sock;
uint8_t transport;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (link->configured != 1) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
if (link->status.enabled != 0) {
err = -1;
savederrno = EBUSY;
log_err(knet_h, KNET_SUB_LINK, "Host %u link %u is currently in use: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
/*
* remove well known access lists here.
* After the transport has done clearing the config,
* then we can remove any leftover access lists if the link
* is no longer in use.
*/
if ((transport_get_acl_type(knet_h, link->transport) == USE_GENERIC_ACL) &&
(link->dynamic == KNET_LINK_STATIC)) {
if ((check_rm(knet_h, link,
&link->dst_addr, &link->dst_addr,
CHECK_TYPE_ADDRESS, CHECK_ACCEPT) < 0) && (errno != ENOENT)) {
err = -1;
savederrno = errno;
log_err(knet_h, KNET_SUB_LINK, "Host %u link %u: unable to remove default access list",
host_id, link_id);
goto exit_unlock;
}
}
/*
* cache it for later as we don't know if the transport
* will clear link info during clear_config.
*/
sock = link->outsock;
transport = link->transport;
if ((transport_link_clear_config(knet_h, link) < 0) &&
(errno != EBUSY)) {
savederrno = errno;
err = -1;
goto exit_unlock;
}
/*
* remove any other access lists when the socket is no
* longer in use by the transport.
*/
if ((transport_get_acl_type(knet_h, transport) == USE_GENERIC_ACL) &&
(knet_h->knet_transport_fd_tracker[sock].transport == KNET_MAX_TRANSPORTS)) {
check_rmall(knet_h, link);
}
pthread_mutex_destroy(&link->link_stats_mutex);
memset(link, 0, sizeof(struct knet_link));
link->link_id = link_id;
if (knet_h->has_loop_link && host_id == knet_h->host_id && link_id == knet_h->loop_link) {
knet_h->has_loop_link = 0;
if (host->active_link_entries == 0) {
host->status.reachable = 0;
}
}
log_debug(knet_h, KNET_SUB_LINK, "host: %u link: %u config has been wiped",
host_id, link_id);
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_set_enable(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
unsigned int enabled)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (enabled > 1) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
if (link->status.enabled == enabled) {
err = 0;
goto exit_unlock;
}
err = _link_updown(knet_h, host_id, link_id, enabled, link->status.connected, 0);
savederrno = errno;
if (enabled) {
goto exit_unlock;
}
log_debug(knet_h, KNET_SUB_LINK, "host: %u link: %u is disabled",
host_id, link_id);
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_get_enable(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
unsigned int *enabled)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!enabled) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
*enabled = link->status.enabled;
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_set_pong_count(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t pong_count)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (pong_count < 1) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
link->pong_count = pong_count;
log_debug(knet_h, KNET_SUB_LINK,
"host: %u link: %u pong count update: %u",
host_id, link_id, link->pong_count);
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_get_pong_count(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t *pong_count)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!pong_count) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
*pong_count = link->pong_count;
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_set_ping_timers(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
time_t interval, time_t timeout, unsigned int precision)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!interval) {
errno = EINVAL;
return -1;
}
if (!timeout) {
errno = ENOSYS;
return -1;
}
if (!precision) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
link->ping_interval = interval * 1000; /* microseconds */
link->pong_timeout = timeout * 1000; /* microseconds */
link->latency_max_samples = precision;
log_debug(knet_h, KNET_SUB_LINK,
"host: %u link: %u timeout update - interval: %llu timeout: %llu precision: %u",
host_id, link_id, link->ping_interval, link->pong_timeout, precision);
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_get_ping_timers(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
time_t *interval, time_t *timeout, unsigned int *precision)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!interval) {
errno = EINVAL;
return -1;
}
if (!timeout) {
errno = EINVAL;
return -1;
}
if (!precision) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
*interval = link->ping_interval / 1000; /* microseconds */
*timeout = link->pong_timeout / 1000;
*precision = link->latency_max_samples;
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_set_priority(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t priority)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
uint8_t old_priority;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
old_priority = link->priority;
if (link->priority == priority) {
err = 0;
goto exit_unlock;
}
link->priority = priority;
if (_host_dstcache_update_sync(knet_h, host)) {
savederrno = errno;
log_debug(knet_h, KNET_SUB_LINK,
"Unable to update link priority (host: %u link: %u priority: %u): %s",
host_id, link_id, link->priority, strerror(savederrno));
link->priority = old_priority;
err = -1;
goto exit_unlock;
}
log_debug(knet_h, KNET_SUB_LINK,
"host: %u link: %u priority set to: %u",
host_id, link_id, link->priority);
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_get_priority(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
uint8_t *priority)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!priority) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
*priority = link->priority;
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_get_link_list(knet_handle_t knet_h, knet_node_id_t host_id,
uint8_t *link_ids, size_t *link_ids_entries)
{
int savederrno = 0, err = 0, i, count = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (!link_ids) {
errno = EINVAL;
return -1;
}
if (!link_ids_entries) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
for (i = 0; i < KNET_MAX_LINK; i++) {
link = &host->link[i];
if (!link->configured) {
continue;
}
link_ids[count] = i;
count++;
}
*link_ids_entries = count;
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_get_status(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
struct knet_link_status *status, size_t struct_size)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
if (!status) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
savederrno = pthread_mutex_lock(&link->link_stats_mutex);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get stats mutex lock for host %u link %u: %s",
host_id, link_id, strerror(savederrno));
err = -1;
goto exit_unlock;
}
memmove(status, &link->status, struct_size);
pthread_mutex_unlock(&link->link_stats_mutex);
/* Calculate totals - no point in doing this on-the-fly */
status->stats.rx_total_packets =
status->stats.rx_data_packets +
status->stats.rx_ping_packets +
status->stats.rx_pong_packets +
status->stats.rx_pmtu_packets;
status->stats.tx_total_packets =
status->stats.tx_data_packets +
status->stats.tx_ping_packets +
status->stats.tx_pong_packets +
status->stats.tx_pmtu_packets;
status->stats.rx_total_bytes =
status->stats.rx_data_bytes +
status->stats.rx_ping_bytes +
status->stats.rx_pong_bytes +
status->stats.rx_pmtu_bytes;
status->stats.tx_total_bytes =
status->stats.tx_data_bytes +
status->stats.tx_ping_bytes +
status->stats.tx_pong_bytes +
status->stats.tx_pmtu_bytes;
status->stats.tx_total_errors =
status->stats.tx_data_errors +
status->stats.tx_ping_errors +
status->stats.tx_pong_errors +
status->stats.tx_pmtu_errors;
status->stats.tx_total_retries =
status->stats.tx_data_retries +
status->stats.tx_ping_retries +
status->stats.tx_pong_retries +
status->stats.tx_pmtu_retries;
/* Tell the caller our full size in case they have an old version */
status->size = sizeof(struct knet_link_status);
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = err ? savederrno : 0;
return err;
}
int knet_link_enable_status_change_notify(knet_handle_t knet_h,
void *link_status_change_notify_fn_private_data,
void (*link_status_change_notify_fn) (
void *private_data,
knet_node_id_t host_id,
uint8_t link_id,
uint8_t connected,
uint8_t remote,
uint8_t external))
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
knet_h->link_status_change_notify_fn_private_data = link_status_change_notify_fn_private_data;
knet_h->link_status_change_notify_fn = link_status_change_notify_fn;
if (knet_h->link_status_change_notify_fn) {
log_debug(knet_h, KNET_SUB_LINK, "link_status_change_notify_fn enabled");
} else {
log_debug(knet_h, KNET_SUB_LINK, "link_status_change_notify_fn disabled");
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = 0;
return 0;
}
int knet_link_insert_acl(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
int index,
struct sockaddr_storage *ss1,
struct sockaddr_storage *ss2,
check_type_t type, check_acceptreject_t acceptreject)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (!ss1) {
errno = EINVAL;
return -1;
}
if ((type != CHECK_TYPE_ADDRESS) &&
(type != CHECK_TYPE_MASK) &&
(type != CHECK_TYPE_RANGE)) {
errno = EINVAL;
return -1;
}
if ((acceptreject != CHECK_ACCEPT) &&
(acceptreject != CHECK_REJECT)) {
errno = EINVAL;
return -1;
}
if ((type != CHECK_TYPE_ADDRESS) && (!ss2)) {
errno = EINVAL;
return -1;
}
if ((type == CHECK_TYPE_RANGE) &&
(ss1->ss_family != ss2->ss_family)) {
errno = EINVAL;
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
if (link->dynamic != KNET_LINK_DYNIP) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is a point to point connection: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
err = check_add(knet_h, link, index,
ss1, ss2, type, acceptreject);
savederrno = errno;
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = savederrno;
return err;
}
int knet_link_add_acl(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
struct sockaddr_storage *ss1,
struct sockaddr_storage *ss2,
check_type_t type, check_acceptreject_t acceptreject)
{
return knet_link_insert_acl(knet_h, host_id, link_id, -1, ss1, ss2, type, acceptreject);
}
int knet_link_rm_acl(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id,
struct sockaddr_storage *ss1,
struct sockaddr_storage *ss2,
check_type_t type, check_acceptreject_t acceptreject)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (!ss1) {
errno = EINVAL;
return -1;
}
if ((type != CHECK_TYPE_ADDRESS) &&
(type != CHECK_TYPE_MASK) &&
(type != CHECK_TYPE_RANGE)) {
errno = EINVAL;
return -1;
}
if ((acceptreject != CHECK_ACCEPT) &&
(acceptreject != CHECK_REJECT)) {
errno = EINVAL;
return -1;
}
if ((type != CHECK_TYPE_ADDRESS) && (!ss2)) {
errno = EINVAL;
return -1;
}
if ((type == CHECK_TYPE_RANGE) &&
(ss1->ss_family != ss2->ss_family)) {
errno = EINVAL;
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
if (link->dynamic != KNET_LINK_DYNIP) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is a point to point connection: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
err = check_rm(knet_h, link,
ss1, ss2, type, acceptreject);
savederrno = errno;
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = savederrno;
return err;
}
int knet_link_clear_acl(knet_handle_t knet_h, knet_node_id_t host_id, uint8_t link_id)
{
int savederrno = 0, err = 0;
struct knet_host *host;
struct knet_link *link;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (link_id >= KNET_MAX_LINK) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_LINK, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
host = knet_h->host_index[host_id];
if (!host) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "Unable to find host %u: %s",
host_id, strerror(savederrno));
goto exit_unlock;
}
link = &host->link[link_id];
if (!link->configured) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is not configured: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
if (link->dynamic != KNET_LINK_DYNIP) {
err = -1;
savederrno = EINVAL;
log_err(knet_h, KNET_SUB_LINK, "host %u link %u is a point to point connection: %s",
host_id, link_id, strerror(savederrno));
goto exit_unlock;
}
check_rmall(knet_h, link);
exit_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = savederrno;
return err;
}
diff --git a/libknet/threads_common.c b/libknet/threads_common.c
index d1398801..f026bf5f 100644
--- a/libknet/threads_common.c
+++ b/libknet/threads_common.c
@@ -1,341 +1,353 @@
/*
* Copyright (C) 2016-2022 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 <pthread.h>
#include <errno.h>
#include <string.h>
#include <zlib.h>
#include "internals.h"
#include "logging.h"
#include "threads_common.h"
int shutdown_in_progress(knet_handle_t knet_h)
{
int savederrno = 0;
int ret;
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_COMMON, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
ret = knet_h->fini_in_progress;
pthread_rwlock_unlock(&knet_h->global_rwlock);
return ret;
}
-static int pmtud_reschedule(knet_handle_t knet_h)
+static int _pmtud_reschedule(knet_handle_t knet_h)
{
- if (pthread_mutex_lock(&knet_h->pmtud_mutex) != 0) {
- log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock");
- return -1;
- }
-
if (knet_h->pmtud_running) {
knet_h->pmtud_abort = 1;
if (knet_h->pmtud_waiting) {
pthread_cond_signal(&knet_h->pmtud_cond);
}
}
+ return 0;
+}
+static int pmtud_reschedule(knet_handle_t knet_h)
+{
+ int res;
+
+ if (pthread_mutex_lock(&knet_h->pmtud_mutex) != 0) {
+ log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock");
+ return -1;
+ }
+ res = _pmtud_reschedule(knet_h);
pthread_mutex_unlock(&knet_h->pmtud_mutex);
- return 0;
+ return res;
}
int get_global_wrlock(knet_handle_t knet_h)
{
if (pmtud_reschedule(knet_h) < 0) {
log_info(knet_h, KNET_SUB_PMTUD, "Unable to notify PMTUd to reschedule. Expect delays in executing API calls");
}
return pthread_rwlock_wrlock(&knet_h->global_rwlock);
}
static struct pretty_names thread_names[KNET_THREAD_MAX] =
{
{ "TX", KNET_THREAD_TX },
{ "RX", KNET_THREAD_RX },
{ "HB", KNET_THREAD_HB },
{ "PMTUD", KNET_THREAD_PMTUD },
#ifdef HAVE_NETINET_SCTP_H
{ "SCTP_LISTEN", KNET_THREAD_SCTP_LISTEN },
{ "SCTP_CONN", KNET_THREAD_SCTP_CONN },
#endif
{ "DST_LINK", KNET_THREAD_DST_LINK }
};
static struct pretty_names thread_status[] =
{
{ "unregistered", KNET_THREAD_UNREGISTERED },
{ "registered", KNET_THREAD_REGISTERED },
{ "started", KNET_THREAD_STARTED },
{ "stopped", KNET_THREAD_STOPPED }
};
static const char *get_thread_status_name(uint8_t status)
{
unsigned int i;
for (i = 0; i < KNET_THREAD_STATUS_MAX; i++) {
if (thread_status[i].val == status) {
return thread_status[i].name;
}
}
return "unknown";
}
static const char *get_thread_name(uint8_t thread_id)
{
unsigned int i;
for (i = 0; i < KNET_THREAD_MAX; i++) {
if (thread_names[i].val == thread_id) {
return thread_names[i].name;
}
}
return "unknown";
}
int get_thread_flush_queue(knet_handle_t knet_h, uint8_t thread_id)
{
uint8_t flush;
if (pthread_mutex_lock(&knet_h->threads_status_mutex) != 0) {
log_debug(knet_h, KNET_SUB_HANDLE, "Unable to get mutex lock");
return -1;
}
flush = knet_h->threads_flush_queue[thread_id];
pthread_mutex_unlock(&knet_h->threads_status_mutex);
return flush;
}
int set_thread_flush_queue(knet_handle_t knet_h, uint8_t thread_id, uint8_t status)
{
if (pthread_mutex_lock(&knet_h->threads_status_mutex) != 0) {
log_debug(knet_h, KNET_SUB_HANDLE, "Unable to get mutex lock");
return -1;
}
knet_h->threads_flush_queue[thread_id] = status;
log_debug(knet_h, KNET_SUB_HANDLE, "Updated flush queue request for thread %s to %u",
get_thread_name(thread_id), status);
pthread_mutex_unlock(&knet_h->threads_status_mutex);
return 0;
}
int wait_all_threads_flush_queue(knet_handle_t knet_h)
{
uint8_t i = 0, found = 0;
while (!found) {
usleep(knet_h->threads_timer_res);
if (pthread_mutex_lock(&knet_h->threads_status_mutex) != 0) {
continue;
}
found = 1;
for (i = 0; i < KNET_THREAD_MAX; i++) {
if (knet_h->threads_flush_queue[i] == KNET_THREAD_QUEUE_FLUSHED) {
continue;
}
log_debug(knet_h, KNET_SUB_HANDLE, "Checking thread: %s queue: %u",
get_thread_name(i),
knet_h->threads_flush_queue[i]);
if (knet_h->threads_flush_queue[i] != KNET_THREAD_QUEUE_FLUSHED) {
found = 0;
}
}
pthread_mutex_unlock(&knet_h->threads_status_mutex);
}
return 0;
}
int set_thread_status(knet_handle_t knet_h, uint8_t thread_id, uint8_t status)
{
if (pthread_mutex_lock(&knet_h->threads_status_mutex) != 0) {
log_debug(knet_h, KNET_SUB_HANDLE, "Unable to get mutex lock");
return -1;
}
knet_h->threads_status[thread_id] = status;
log_debug(knet_h, KNET_SUB_HANDLE, "Updated status for thread %s to %s",
get_thread_name(thread_id), get_thread_status_name(status));
pthread_mutex_unlock(&knet_h->threads_status_mutex);
return 0;
}
int wait_all_threads_status(knet_handle_t knet_h, uint8_t status)
{
uint8_t i = 0, found = 0;
while (!found) {
usleep(knet_h->threads_timer_res);
if (pthread_mutex_lock(&knet_h->threads_status_mutex) != 0) {
continue;
}
found = 1;
for (i = 0; i < KNET_THREAD_MAX; i++) {
if (knet_h->threads_status[i] == KNET_THREAD_UNREGISTERED) {
continue;
}
log_debug(knet_h, KNET_SUB_HANDLE, "Checking thread: %s status: %s req: %s",
get_thread_name(i),
get_thread_status_name(knet_h->threads_status[i]),
get_thread_status_name(status));
if (knet_h->threads_status[i] != status) {
found = 0;
}
}
pthread_mutex_unlock(&knet_h->threads_status_mutex);
}
return 0;
}
-void force_pmtud_run(knet_handle_t knet_h, uint8_t subsystem, uint8_t reset_mtu)
+void force_pmtud_run(knet_handle_t knet_h, uint8_t subsystem, uint8_t reset_mtu, uint8_t force_restart)
{
if (reset_mtu) {
log_debug(knet_h, subsystem, "PMTUd has been reset to default");
knet_h->data_mtu = calc_min_mtu(knet_h);
if (knet_h->pmtud_notify_fn) {
knet_h->pmtud_notify_fn(knet_h->pmtud_notify_fn_private_data,
knet_h->data_mtu);
}
}
/*
* we can only try to take a lock here. This part of the code
* can be invoked by any thread, including PMTUd that is already
* holding a lock at that stage.
* If PMTUd is holding the lock, most likely it is already running
* and we don't need to notify it back.
*/
if (!pthread_mutex_trylock(&knet_h->pmtud_mutex)) {
if (!knet_h->pmtud_running) {
if (!knet_h->pmtud_forcerun) {
log_debug(knet_h, subsystem, "Notifying PMTUd to rerun");
knet_h->pmtud_forcerun = 1;
}
+ } else {
+ if (force_restart) {
+ if (_pmtud_reschedule(knet_h) < 0) {
+ log_info(knet_h, KNET_SUB_PMTUD, "Unable to notify PMTUd to reschedule. A joining node may struggle to connect properly");
+ }
+ }
}
pthread_mutex_unlock(&knet_h->pmtud_mutex);
}
}
int knet_handle_set_threads_timer_res(knet_handle_t knet_h,
useconds_t timeres)
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
/*
* most threads use timeres / 1000 as timeout on epoll.
* anything below 1000 would generate a result of 0, making
* the threads spin at 100% cpu
*/
if ((timeres > 0) && (timeres < 1000)) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
if (timeres) {
knet_h->threads_timer_res = timeres;
log_debug(knet_h, KNET_SUB_HANDLE, "Setting new threads timer resolution to %u usecs", knet_h->threads_timer_res);
} else {
knet_h->threads_timer_res = KNET_THREADS_TIMER_RES;
log_debug(knet_h, KNET_SUB_HANDLE, "Setting new threads timer resolution to default %u usecs", knet_h->threads_timer_res);
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
return 0;
}
int knet_handle_get_threads_timer_res(knet_handle_t knet_h,
useconds_t *timeres)
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (!timeres) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_HANDLE, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
*timeres = knet_h->threads_timer_res;
pthread_rwlock_unlock(&knet_h->global_rwlock);
return 0;
}
uint32_t compute_chksum(const unsigned char *data, uint32_t data_len)
{
uLong crc;
crc = crc32(0, NULL, 0);
crc = crc32(crc, (Bytef*)data, data_len);
return crc;
}
uint32_t compute_chksumv(const struct iovec *iov_in, int iovcnt_in)
{
uLong crc;
int i;
crc = crc32(0, NULL, 0);
for (i = 0; i < iovcnt_in; i++) {
crc = crc32(crc, (Bytef*)iov_in[i].iov_base, iov_in[i].iov_len);
}
return crc;
}
diff --git a/libknet/threads_common.h b/libknet/threads_common.h
index b79faf37..f38dc283 100644
--- a/libknet/threads_common.h
+++ b/libknet/threads_common.h
@@ -1,56 +1,56 @@
/*
* Copyright (C) 2012-2022 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+
*/
#ifndef __KNET_THREADS_COMMON_H__
#define __KNET_THREADS_COMMON_H__
#include "internals.h"
#define KNET_THREAD_UNREGISTERED 0 /* thread does not exist */
#define KNET_THREAD_REGISTERED 1 /* thread has been registered before pthread_create invocation.
make sure threads are registered before calling wait_all_thread_status */
#define KNET_THREAD_STARTED 2 /* thread has reported to be running */
#define KNET_THREAD_STOPPED 3 /* thread has returned */
#define KNET_THREAD_STATUS_MAX KNET_THREAD_STOPPED + 1
#define KNET_THREAD_TX 0
#define KNET_THREAD_RX 1
#define KNET_THREAD_HB 2
#define KNET_THREAD_PMTUD 3
#define KNET_THREAD_DST_LINK 4
#ifdef HAVE_NETINET_SCTP_H
#define KNET_THREAD_SCTP_LISTEN 5
#define KNET_THREAD_SCTP_CONN 6
#endif
#define KNET_THREAD_MAX 32
#define KNET_THREAD_QUEUE_FLUSHED 0
#define KNET_THREAD_QUEUE_FLUSH 1
#define timespec_diff(start, end, diff) \
do { \
if (end.tv_sec > start.tv_sec) \
*(diff) = ((end.tv_sec - start.tv_sec) * 1000000000llu) \
+ end.tv_nsec - start.tv_nsec; \
else \
*(diff) = end.tv_nsec - start.tv_nsec; \
} while (0);
int shutdown_in_progress(knet_handle_t knet_h);
int get_global_wrlock(knet_handle_t knet_h);
int get_thread_flush_queue(knet_handle_t knet_h, uint8_t thread_id);
int set_thread_flush_queue(knet_handle_t knet_h, uint8_t thread_id, uint8_t status);
int wait_all_threads_flush_queue(knet_handle_t knet_h);
int set_thread_status(knet_handle_t knet_h, uint8_t thread_id, uint8_t status);
int wait_all_threads_status(knet_handle_t knet_h, uint8_t status);
-void force_pmtud_run(knet_handle_t knet_h, uint8_t subsystem, uint8_t reset_mtu);
+void force_pmtud_run(knet_handle_t knet_h, uint8_t subsystem, uint8_t reset_mtu, uint8_t force_restart);
uint32_t compute_chksum(const unsigned char *data, uint32_t data_len);
uint32_t compute_chksumv(const struct iovec *iov_in, int iovcnt_in);
#endif
diff --git a/libknet/threads_pmtud.c b/libknet/threads_pmtud.c
index 179536b8..1db4cab4 100644
--- a/libknet/threads_pmtud.c
+++ b/libknet/threads_pmtud.c
@@ -1,938 +1,938 @@
/*
* Copyright (C) 2015-2022 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 <string.h>
#include <errno.h>
#include <pthread.h>
#include "crypto.h"
#include "links.h"
#include "host.h"
#include "logging.h"
#include "transports.h"
#include "threads_common.h"
#include "threads_pmtud.h"
#include "onwire_v1.h"
static int _calculate_manual_mtu(knet_handle_t knet_h, struct knet_link *dst_link)
{
size_t ipproto_overhead_len; /* onwire packet overhead (protocol based) */
switch (dst_link->dst_addr.ss_family) {
case AF_INET6:
ipproto_overhead_len = KNET_PMTUD_OVERHEAD_V6 + dst_link->proto_overhead;
break;
case AF_INET:
ipproto_overhead_len = KNET_PMTUD_OVERHEAD_V4 + dst_link->proto_overhead;
break;
default:
log_debug(knet_h, KNET_SUB_PMTUD, "unknown protocol");
return 0;
break;
}
dst_link->status.mtu = calc_max_data_outlen(knet_h, knet_h->manual_mtu - ipproto_overhead_len);
return 1;
}
static int _handle_check_link_pmtud(knet_handle_t knet_h, struct knet_host *dst_host, struct knet_link *dst_link)
{
int err, ret, savederrno, mutex_retry_limit, failsafe, use_kernel_mtu, warn_once;
uint32_t kernel_mtu; /* record kernel_mtu from EMSGSIZE */
size_t onwire_len; /* current packet onwire size */
size_t ipproto_overhead_len; /* onwire packet overhead (protocol based) */
size_t max_mtu_len; /* max mtu for protocol */
size_t data_len; /* how much data we can send in the packet
* generally would be onwire_len - ipproto_overhead_len
* needs to be adjusted for crypto
*/
size_t app_mtu_len; /* real data that we can send onwire */
ssize_t len; /* len of what we were able to sendto onwire */
uint8_t onwire_ver;
struct timespec ts, pmtud_crypto_start_ts, pmtud_crypto_stop_ts;
unsigned long long pong_timeout_adj_tmp, timediff;
int pmtud_crypto_reduce = 1;
unsigned char *outbuf = (unsigned char *)knet_h->pmtudbuf;
warn_once = 0;
mutex_retry_limit = 0;
failsafe = 0;
switch (dst_link->dst_addr.ss_family) {
case AF_INET6:
max_mtu_len = KNET_PMTUD_SIZE_V6;
ipproto_overhead_len = KNET_PMTUD_OVERHEAD_V6 + dst_link->proto_overhead;
break;
case AF_INET:
max_mtu_len = KNET_PMTUD_SIZE_V4;
ipproto_overhead_len = KNET_PMTUD_OVERHEAD_V4 + dst_link->proto_overhead;
break;
default:
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUD aborted, unknown protocol");
return -1;
break;
}
dst_link->last_bad_mtu = 0;
dst_link->last_good_mtu = dst_link->last_ping_size + ipproto_overhead_len;
/*
* discovery starts from the top because kernel will
* refuse to send packets > current iface mtu.
* this saves us some time and network bw.
*/
onwire_len = max_mtu_len;
/*
* cache onwire version for this link / run
*/
if (pthread_mutex_lock(&knet_h->onwire_mutex)) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get onwire mutex lock");
return -1;
}
onwire_ver = knet_h->onwire_ver;
pthread_mutex_unlock(&knet_h->onwire_mutex);
restart:
/*
* prevent a race when interface mtu is changed _exactly_ during
* the discovery process and it's complex to detect. Easier
* to wait the next loop.
* 30 is not an arbitrary value. To bisect from 576 to 128000 doesn't
* take more than 18/19 steps.
*/
if (failsafe == 30) {
log_err(knet_h, KNET_SUB_PMTUD,
"Aborting PMTUD process: Too many attempts. MTU might have changed during discovery.");
return -1;
} else {
failsafe++;
}
/*
* common to all packets
*/
/*
* calculate the application MTU based on current onwire_len minus ipproto_overhead_len
*/
app_mtu_len = calc_max_data_outlen(knet_h, onwire_len - ipproto_overhead_len);
/*
* recalculate onwire len back that might be different based
* on data padding from crypto layer.
*/
onwire_len = calc_data_outlen(knet_h, app_mtu_len + KNET_HEADER_ALL_SIZE) + ipproto_overhead_len;
/*
* calculate the size of what we need to send to sendto(2).
* see also onwire.c for packet format explanation.
*/
data_len = app_mtu_len + knet_h->sec_hash_size + knet_h->sec_salt_size + KNET_HEADER_ALL_SIZE;
if (knet_h->onwire_ver_remap) {
prep_pmtud_v1(knet_h, dst_link, onwire_ver, onwire_len, app_mtu_len + KNET_HEADER_ALL_SIZE);
} else {
switch (onwire_ver) {
case 1:
prep_pmtud_v1(knet_h, dst_link, onwire_ver, onwire_len, app_mtu_len + KNET_HEADER_ALL_SIZE);
break;
default:
log_warn(knet_h, KNET_SUB_PMTUD, "preparing PMTUD onwire version %u not supported", onwire_ver);
return -1;
break;
}
}
if (knet_h->crypto_in_use_config) {
if (data_len < (knet_h->sec_hash_size + knet_h->sec_salt_size) + 1) {
log_debug(knet_h, KNET_SUB_PMTUD, "Aborting PMTUD process: link mtu smaller than crypto header detected (link might have been disconnected)");
return -1;
}
if (crypto_encrypt_and_sign(knet_h,
(const unsigned char *)knet_h->pmtudbuf,
data_len - (knet_h->sec_hash_size + knet_h->sec_salt_size),
knet_h->pmtudbuf_crypt,
(ssize_t *)&data_len) < 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to crypto pmtud packet");
return -1;
}
outbuf = knet_h->pmtudbuf_crypt;
if (pthread_mutex_lock(&knet_h->handle_stats_mutex) < 0) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock");
return -1;
}
knet_h->stats_extra.tx_crypt_pmtu_packets++;
pthread_mutex_unlock(&knet_h->handle_stats_mutex);
}
/* link has gone down, aborting pmtud */
if (dst_link->status.connected != 1) {
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUD detected host (%u) link (%u) has been disconnected", dst_host->host_id, dst_link->link_id);
return -1;
}
if (dst_link->transport_connected != 1) {
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUD detected host (%u) link (%u) has been disconnected", dst_host->host_id, dst_link->link_id);
return -1;
}
if (pthread_mutex_lock(&knet_h->pmtud_mutex) != 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock");
return -1;
}
if (knet_h->pmtud_abort) {
pthread_mutex_unlock(&knet_h->pmtud_mutex);
errno = EDEADLK;
return -1;
}
savederrno = pthread_mutex_lock(&knet_h->tx_mutex);
if (savederrno) {
pthread_mutex_unlock(&knet_h->pmtud_mutex);
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get TX mutex lock: %s", strerror(savederrno));
return -1;
}
savederrno = pthread_mutex_lock(&dst_link->link_stats_mutex);
if (savederrno) {
pthread_mutex_unlock(&knet_h->pmtud_mutex);
pthread_mutex_unlock(&knet_h->tx_mutex);
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get stats mutex lock for host %u link %u: %s",
dst_host->host_id, dst_link->link_id, strerror(savederrno));
return -1;
}
retry:
if (transport_get_connection_oriented(knet_h, dst_link->transport) == TRANSPORT_PROTO_NOT_CONNECTION_ORIENTED) {
len = sendto(dst_link->outsock, outbuf, data_len, MSG_DONTWAIT | MSG_NOSIGNAL,
(struct sockaddr *) &dst_link->dst_addr,
knet_h->knet_transport_fd_tracker[dst_link->outsock].sockaddr_len);
} else {
len = sendto(dst_link->outsock, outbuf, data_len, MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0);
}
savederrno = errno;
/*
* we cannot hold a lock on kmtu_mutex between resetting
* knet_h->kernel_mtu here and below where it's used.
* use_kernel_mtu tells us if the knet_h->kernel_mtu was
* set to 0 and we can trust its value later.
*/
use_kernel_mtu = 0;
if (pthread_mutex_lock(&knet_h->kmtu_mutex) == 0) {
use_kernel_mtu = 1;
knet_h->kernel_mtu = 0;
pthread_mutex_unlock(&knet_h->kmtu_mutex);
}
kernel_mtu = 0;
err = transport_tx_sock_error(knet_h, dst_link->transport, dst_link->outsock, len, savederrno);
switch(err) {
case KNET_TRANSPORT_SOCK_ERROR_INTERNAL:
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to send pmtu packet (sendto): %d %s", savederrno, strerror(savederrno));
pthread_mutex_unlock(&knet_h->tx_mutex);
pthread_mutex_unlock(&knet_h->pmtud_mutex);
dst_link->status.stats.tx_pmtu_errors++;
pthread_mutex_unlock(&dst_link->link_stats_mutex);
return -1;
break;
case KNET_TRANSPORT_SOCK_ERROR_IGNORE:
break;
case KNET_TRANSPORT_SOCK_ERROR_RETRY:
dst_link->status.stats.tx_pmtu_retries++;
goto retry;
break;
}
pthread_mutex_unlock(&knet_h->tx_mutex);
if (len != (ssize_t )data_len) {
pthread_mutex_unlock(&dst_link->link_stats_mutex);
if (savederrno == EMSGSIZE) {
/*
* we cannot hold a lock on kmtu_mutex between resetting
* knet_h->kernel_mtu and here.
* use_kernel_mtu tells us if the knet_h->kernel_mtu was
* set to 0 previously and we can trust its value now.
*/
if (use_kernel_mtu) {
use_kernel_mtu = 0;
if (pthread_mutex_lock(&knet_h->kmtu_mutex) == 0) {
kernel_mtu = knet_h->kernel_mtu;
pthread_mutex_unlock(&knet_h->kmtu_mutex);
}
}
if (kernel_mtu > 0) {
dst_link->last_bad_mtu = kernel_mtu + 1;
} else {
dst_link->last_bad_mtu = onwire_len;
}
} else {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to send pmtu packet len: %zu err: %s", onwire_len, strerror(savederrno));
}
} else {
dst_link->last_sent_mtu = onwire_len;
dst_link->last_recv_mtu = 0;
dst_link->status.stats.tx_pmtu_packets++;
dst_link->status.stats.tx_pmtu_bytes += data_len;
pthread_mutex_unlock(&dst_link->link_stats_mutex);
if (clock_gettime(CLOCK_REALTIME, &ts) < 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get current time: %s", strerror(errno));
pthread_mutex_unlock(&knet_h->pmtud_mutex);
return -1;
}
/*
* non fatal, we can wait the next round to reduce the
* multiplier
*/
if (clock_gettime(CLOCK_MONOTONIC, &pmtud_crypto_start_ts) < 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get current time: %s", strerror(errno));
pmtud_crypto_reduce = 0;
}
/*
* set PMTUd reply timeout to match pong_timeout on a given link
*
* math: internally pong_timeout is expressed in microseconds, while
* the public API exports milliseconds. So careful with the 0's here.
* the loop is necessary because we are grabbing the current time just above
* and add values to it that could overflow into seconds.
*/
if (pthread_mutex_lock(&knet_h->backoff_mutex)) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get backoff_mutex");
pthread_mutex_unlock(&knet_h->pmtud_mutex);
return -1;
}
if (knet_h->crypto_in_use_config) {
/*
* crypto, under pressure, is a royal PITA
*/
pong_timeout_adj_tmp = dst_link->pong_timeout_adj * dst_link->pmtud_crypto_timeout_multiplier;
} else {
pong_timeout_adj_tmp = dst_link->pong_timeout_adj;
}
ts.tv_sec += pong_timeout_adj_tmp / 1000000;
ts.tv_nsec += (((pong_timeout_adj_tmp) % 1000000) * 1000);
while (ts.tv_nsec > 1000000000) {
ts.tv_sec += 1;
ts.tv_nsec -= 1000000000;
}
pthread_mutex_unlock(&knet_h->backoff_mutex);
knet_h->pmtud_waiting = 1;
ret = pthread_cond_timedwait(&knet_h->pmtud_cond, &knet_h->pmtud_mutex, &ts);
knet_h->pmtud_waiting = 0;
if (knet_h->pmtud_abort) {
pthread_mutex_unlock(&knet_h->pmtud_mutex);
errno = EDEADLK;
return -1;
}
/*
* we cannot use shutdown_in_progress in here because
* we already hold the read lock
*/
if (knet_h->fini_in_progress) {
pthread_mutex_unlock(&knet_h->pmtud_mutex);
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUD aborted. shutdown in progress");
return -1;
}
if (ret) {
if (ret == ETIMEDOUT) {
if ((knet_h->crypto_in_use_config) && (dst_link->pmtud_crypto_timeout_multiplier < KNET_LINK_PMTUD_CRYPTO_TIMEOUT_MULTIPLIER_MAX)) {
dst_link->pmtud_crypto_timeout_multiplier = dst_link->pmtud_crypto_timeout_multiplier * 2;
pmtud_crypto_reduce = 0;
log_debug(knet_h, KNET_SUB_PMTUD,
"Increasing PMTUd response timeout multiplier to (%u) for host %u link: %u",
dst_link->pmtud_crypto_timeout_multiplier,
dst_host->host_id,
dst_link->link_id);
pthread_mutex_unlock(&knet_h->pmtud_mutex);
goto restart;
}
if (!warn_once) {
log_warn(knet_h, KNET_SUB_PMTUD,
"possible MTU misconfiguration detected. "
"kernel is reporting MTU: %u bytes for "
"host %u link %u but the other node is "
"not acknowledging packets of this size. ",
dst_link->last_sent_mtu,
dst_host->host_id,
dst_link->link_id);
log_warn(knet_h, KNET_SUB_PMTUD,
"This can be caused by this node interface MTU "
"too big or a network device that does not "
"support or has been misconfigured to manage MTU "
"of this size, or packet loss. knet will continue "
"to run but performances might be affected.");
warn_once = 1;
}
} else {
pthread_mutex_unlock(&knet_h->pmtud_mutex);
if (mutex_retry_limit == 3) {
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUD aborted, unable to get mutex lock");
return -1;
}
mutex_retry_limit++;
goto restart;
}
}
if ((knet_h->crypto_in_use_config) && (pmtud_crypto_reduce == 1) &&
(dst_link->pmtud_crypto_timeout_multiplier > KNET_LINK_PMTUD_CRYPTO_TIMEOUT_MULTIPLIER_MIN)) {
if (!clock_gettime(CLOCK_MONOTONIC, &pmtud_crypto_stop_ts)) {
timespec_diff(pmtud_crypto_start_ts, pmtud_crypto_stop_ts, &timediff);
if (((pong_timeout_adj_tmp * 1000) / 2) > timediff) {
dst_link->pmtud_crypto_timeout_multiplier = dst_link->pmtud_crypto_timeout_multiplier / 2;
log_debug(knet_h, KNET_SUB_PMTUD,
"Decreasing PMTUd response timeout multiplier to (%u) for host %u link: %u",
dst_link->pmtud_crypto_timeout_multiplier,
dst_host->host_id,
dst_link->link_id);
}
} else {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get current time: %s", strerror(errno));
}
}
if ((dst_link->last_recv_mtu != onwire_len) || (ret)) {
dst_link->last_bad_mtu = onwire_len;
} else {
int found_mtu = 0;
if (knet_h->sec_block_size) {
if ((onwire_len + knet_h->sec_block_size >= max_mtu_len) ||
((dst_link->last_bad_mtu) && (dst_link->last_bad_mtu <= (onwire_len + knet_h->sec_block_size)))) {
found_mtu = 1;
}
} else {
if ((onwire_len == max_mtu_len) ||
((dst_link->last_bad_mtu) && (dst_link->last_bad_mtu == (onwire_len + 1))) ||
(dst_link->last_bad_mtu == dst_link->last_good_mtu)) {
found_mtu = 1;
}
}
if (found_mtu) {
/*
* account for IP overhead, knet headers and crypto in PMTU calculation
*/
dst_link->status.mtu = calc_max_data_outlen(knet_h, onwire_len - ipproto_overhead_len);
pthread_mutex_unlock(&knet_h->pmtud_mutex);
return 0;
}
dst_link->last_good_mtu = onwire_len;
}
}
if (kernel_mtu) {
onwire_len = kernel_mtu;
} else {
onwire_len = (dst_link->last_good_mtu + dst_link->last_bad_mtu) / 2;
}
pthread_mutex_unlock(&knet_h->pmtud_mutex);
goto restart;
}
static int _handle_check_pmtud(knet_handle_t knet_h, struct knet_host *dst_host, struct knet_link *dst_link, int force_run)
{
uint8_t saved_valid_pmtud;
unsigned int saved_pmtud;
struct timespec clock_now;
unsigned long long diff_pmtud, interval;
if (clock_gettime(CLOCK_MONOTONIC, &clock_now) != 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get monotonic clock");
return 0;
}
if (!force_run) {
interval = knet_h->pmtud_interval * 1000000000llu; /* nanoseconds */
timespec_diff(dst_link->pmtud_last, clock_now, &diff_pmtud);
if (diff_pmtud < interval) {
return dst_link->has_valid_mtu;
}
}
/*
* status.proto_overhead should include all IP/(UDP|SCTP)/knet headers
*
* please note that it is not the same as link->proto_overhead that
* includes only either UDP or SCTP (at the moment) overhead.
*/
switch (dst_link->dst_addr.ss_family) {
case AF_INET6:
dst_link->status.proto_overhead = KNET_PMTUD_OVERHEAD_V6 + dst_link->proto_overhead + KNET_HEADER_ALL_SIZE + knet_h->sec_hash_size + knet_h->sec_salt_size;
break;
case AF_INET:
dst_link->status.proto_overhead = KNET_PMTUD_OVERHEAD_V4 + dst_link->proto_overhead + KNET_HEADER_ALL_SIZE + knet_h->sec_hash_size + knet_h->sec_salt_size;
break;
}
saved_pmtud = dst_link->status.mtu;
saved_valid_pmtud = dst_link->has_valid_mtu;
log_debug(knet_h, KNET_SUB_PMTUD, "Starting PMTUD for host: %u link: %u", dst_host->host_id, dst_link->link_id);
errno = 0;
if (_handle_check_link_pmtud(knet_h, dst_host, dst_link) < 0) {
if (errno == EDEADLK) {
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUD for host: %u link: %u has been rescheduled", dst_host->host_id, dst_link->link_id);
dst_link->status.mtu = saved_pmtud;
dst_link->has_valid_mtu = saved_valid_pmtud;
errno = EDEADLK;
return dst_link->has_valid_mtu;
}
dst_link->has_valid_mtu = 0;
} else {
if (dst_link->status.mtu < calc_min_mtu(knet_h)) {
log_info(knet_h, KNET_SUB_PMTUD,
"Invalid MTU detected for host: %u link: %u mtu: %u",
dst_host->host_id, dst_link->link_id, dst_link->status.mtu);
dst_link->has_valid_mtu = 0;
} else {
dst_link->has_valid_mtu = 1;
}
if (dst_link->has_valid_mtu) {
if ((saved_pmtud) && (saved_pmtud != dst_link->status.mtu)) {
log_info(knet_h, KNET_SUB_PMTUD, "PMTUD link change for host: %u link: %u from %u to %u",
dst_host->host_id, dst_link->link_id, saved_pmtud, dst_link->status.mtu);
}
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUD completed for host: %u link: %u current link mtu: %u",
dst_host->host_id, dst_link->link_id, dst_link->status.mtu);
/*
* set pmtud_last, if we can, after we are done with the PMTUd process
* because it can take a very long time.
*/
dst_link->pmtud_last = clock_now;
if (!clock_gettime(CLOCK_MONOTONIC, &clock_now)) {
dst_link->pmtud_last = clock_now;
}
}
}
if (saved_valid_pmtud != dst_link->has_valid_mtu) {
_host_dstcache_update_async(knet_h, dst_host);
}
return dst_link->has_valid_mtu;
}
void *_handle_pmtud_link_thread(void *data)
{
knet_handle_t knet_h = (knet_handle_t) data;
struct knet_host *dst_host;
struct knet_link *dst_link;
int link_idx;
unsigned int have_mtu;
unsigned int lower_mtu;
int link_has_mtu;
int force_run = 0;
set_thread_status(knet_h, KNET_THREAD_PMTUD, KNET_THREAD_STARTED);
knet_h->data_mtu = calc_min_mtu(knet_h);
while (!shutdown_in_progress(knet_h)) {
usleep(knet_h->threads_timer_res);
if (pthread_mutex_lock(&knet_h->pmtud_mutex) != 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock");
continue;
}
knet_h->pmtud_abort = 0;
knet_h->pmtud_running = 1;
force_run = knet_h->pmtud_forcerun;
knet_h->pmtud_forcerun = 0;
pthread_mutex_unlock(&knet_h->pmtud_mutex);
if (force_run) {
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUd request to rerun has been received");
}
if (pthread_rwlock_rdlock(&knet_h->global_rwlock) != 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get read lock");
continue;
}
lower_mtu = KNET_PMTUD_SIZE_V4;
have_mtu = 0;
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++) {
dst_link = &dst_host->link[link_idx];
if ((dst_link->status.enabled != 1) ||
(dst_link->status.connected != 1) ||
(dst_host->link[link_idx].transport == KNET_TRANSPORT_LOOPBACK) ||
(!dst_link->last_ping_size) ||
((dst_link->dynamic == KNET_LINK_DYNIP) &&
(dst_link->status.dynconnected != 1)))
continue;
if (!knet_h->manual_mtu) {
link_has_mtu = _handle_check_pmtud(knet_h, dst_host, dst_link, force_run);
if (errno == EDEADLK) {
goto out_unlock;
}
if (link_has_mtu) {
have_mtu = 1;
if (dst_link->status.mtu < lower_mtu) {
lower_mtu = dst_link->status.mtu;
}
}
} else {
link_has_mtu = _calculate_manual_mtu(knet_h, dst_link);
if (link_has_mtu) {
have_mtu = 1;
if (dst_link->status.mtu < lower_mtu) {
lower_mtu = dst_link->status.mtu;
}
}
}
}
}
if (have_mtu) {
if (knet_h->data_mtu != lower_mtu) {
knet_h->data_mtu = lower_mtu;
log_info(knet_h, KNET_SUB_PMTUD, "Global data MTU changed to: %u", knet_h->data_mtu);
if (knet_h->pmtud_notify_fn) {
knet_h->pmtud_notify_fn(knet_h->pmtud_notify_fn_private_data,
knet_h->data_mtu);
}
}
}
out_unlock:
pthread_rwlock_unlock(&knet_h->global_rwlock);
if (pthread_mutex_lock(&knet_h->pmtud_mutex) != 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock");
} else {
knet_h->pmtud_running = 0;
pthread_mutex_unlock(&knet_h->pmtud_mutex);
}
}
set_thread_status(knet_h, KNET_THREAD_PMTUD, KNET_THREAD_STOPPED);
return NULL;
}
static void send_pmtud_reply(knet_handle_t knet_h, struct knet_link *src_link, struct knet_header *inbuf)
{
int err = 0, savederrno = 0, stats_err = 0;
unsigned char *outbuf = (unsigned char *)inbuf;
ssize_t len, outlen;
if (knet_h->onwire_ver_remap) {
prep_pmtud_reply_v1(knet_h, inbuf, &outlen);
} else {
switch (inbuf->kh_version) {
case 1:
prep_pmtud_reply_v1(knet_h, inbuf, &outlen);
break;
default:
log_warn(knet_h, KNET_SUB_PMTUD, "preparing PMTUD reply onwire version %u not supported", inbuf->kh_version);
return;
break;
}
}
if (knet_h->crypto_in_use_config) {
if (crypto_encrypt_and_sign(knet_h,
(const unsigned char *)inbuf,
outlen,
knet_h->recv_from_links_buf_crypt,
&outlen) < 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to encrypt PMTUd reply packet");
return;
}
outbuf = knet_h->recv_from_links_buf_crypt;
stats_err = pthread_mutex_lock(&knet_h->handle_stats_mutex);
if (stats_err < 0) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock: %s", strerror(stats_err));
return;
}
knet_h->stats_extra.tx_crypt_pmtu_reply_packets++;
pthread_mutex_unlock(&knet_h->handle_stats_mutex);
}
savederrno = pthread_mutex_lock(&knet_h->tx_mutex);
if (savederrno) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get TX mutex lock: %s", strerror(savederrno));
return;
}
retry:
if (src_link->transport_connected) {
if (transport_get_connection_oriented(knet_h, src_link->transport) == TRANSPORT_PROTO_NOT_CONNECTION_ORIENTED) {
len = sendto(src_link->outsock, outbuf, outlen, MSG_DONTWAIT | MSG_NOSIGNAL,
(struct sockaddr *) &src_link->dst_addr,
knet_h->knet_transport_fd_tracker[src_link->outsock].sockaddr_len);
} else {
len = sendto(src_link->outsock, outbuf, outlen, MSG_DONTWAIT | MSG_NOSIGNAL, NULL, 0);
}
savederrno = errno;
if (len != outlen) {
err = transport_tx_sock_error(knet_h, src_link->transport, src_link->outsock, len, savederrno);
stats_err = pthread_mutex_lock(&src_link->link_stats_mutex);
if (stats_err < 0) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock: %s", strerror(stats_err));
return;
}
switch(err) {
case KNET_TRANSPORT_SOCK_ERROR_INTERNAL:
log_debug(knet_h, KNET_SUB_PMTUD,
"Unable to send PMTUd reply (sock: %d) packet (sendto): %d %s. recorded src ip: %s src port: %s dst ip: %s dst port: %s",
src_link->outsock, errno, strerror(errno),
src_link->status.src_ipaddr, src_link->status.src_port,
src_link->status.dst_ipaddr, src_link->status.dst_port);
src_link->status.stats.tx_pmtu_errors++;
break;
case KNET_TRANSPORT_SOCK_ERROR_IGNORE:
src_link->status.stats.tx_pmtu_errors++;
break;
case KNET_TRANSPORT_SOCK_ERROR_RETRY:
src_link->status.stats.tx_pmtu_retries++;
pthread_mutex_unlock(&src_link->link_stats_mutex);
goto retry;
break;
}
pthread_mutex_unlock(&src_link->link_stats_mutex);
}
}
pthread_mutex_unlock(&knet_h->tx_mutex);
}
void process_pmtud(knet_handle_t knet_h, struct knet_link *src_link, struct knet_header *inbuf)
{
/*
* at the moment we don't need to take any extra
* actions when processing a PMTUd packet, except
* sending a reply
*/
send_pmtud_reply(knet_h, src_link, inbuf);
}
void process_pmtud_reply(knet_handle_t knet_h, struct knet_link *src_link, struct knet_header *inbuf)
{
if (pthread_mutex_lock(&knet_h->pmtud_mutex) != 0) {
log_debug(knet_h, KNET_SUB_PMTUD, "Unable to get mutex lock");
return;
}
if (knet_h->onwire_ver_remap) {
process_pmtud_reply_v1(knet_h, src_link, inbuf);
} else {
switch (inbuf->kh_version) {
case 1:
process_pmtud_reply_v1(knet_h, src_link, inbuf);
break;
default:
log_warn(knet_h, KNET_SUB_PMTUD, "preparing PMTUD reply onwire version %u not supported", inbuf->kh_version);
goto out_unlock;
break;
}
}
pthread_cond_signal(&knet_h->pmtud_cond);
out_unlock:
pthread_mutex_unlock(&knet_h->pmtud_mutex);
}
int knet_handle_pmtud_getfreq(knet_handle_t knet_h, unsigned int *interval)
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (!interval) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
*interval = knet_h->pmtud_interval;
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = 0;
return 0;
}
int knet_handle_pmtud_setfreq(knet_handle_t knet_h, unsigned int interval)
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if ((!interval) || (interval > 86400)) {
errno = EINVAL;
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
knet_h->pmtud_interval = interval;
log_debug(knet_h, KNET_SUB_PMTUD, "PMTUd interval set to: %u seconds", interval);
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = 0;
return 0;
}
int knet_handle_enable_pmtud_notify(knet_handle_t knet_h,
void *pmtud_notify_fn_private_data,
void (*pmtud_notify_fn) (
void *private_data,
unsigned int data_mtu))
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
savederrno = get_global_wrlock(knet_h);
if (savederrno) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get write lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
knet_h->pmtud_notify_fn_private_data = pmtud_notify_fn_private_data;
knet_h->pmtud_notify_fn = pmtud_notify_fn;
if (knet_h->pmtud_notify_fn) {
log_debug(knet_h, KNET_SUB_PMTUD, "pmtud_notify_fn enabled");
} else {
log_debug(knet_h, KNET_SUB_PMTUD, "pmtud_notify_fn disabled");
}
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = 0;
return 0;
}
int knet_handle_pmtud_set(knet_handle_t knet_h,
unsigned int iface_mtu)
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (iface_mtu > KNET_PMTUD_SIZE_V4) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
log_info(knet_h, KNET_SUB_PMTUD, "MTU manually set to: %u", iface_mtu);
knet_h->manual_mtu = iface_mtu;
- force_pmtud_run(knet_h, KNET_SUB_PMTUD, 0);
+ force_pmtud_run(knet_h, KNET_SUB_PMTUD, 0, 0);
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = 0;
return 0;
}
int knet_handle_pmtud_get(knet_handle_t knet_h,
unsigned int *data_mtu)
{
int savederrno = 0;
if (!_is_valid_handle(knet_h)) {
return -1;
}
if (!data_mtu) {
errno = EINVAL;
return -1;
}
savederrno = pthread_rwlock_rdlock(&knet_h->global_rwlock);
if (savederrno) {
log_err(knet_h, KNET_SUB_PMTUD, "Unable to get read lock: %s",
strerror(savederrno));
errno = savederrno;
return -1;
}
*data_mtu = knet_h->data_mtu;
pthread_rwlock_unlock(&knet_h->global_rwlock);
errno = 0;
return 0;
}
diff --git a/libknet/transport_udp.c b/libknet/transport_udp.c
index ec5525fd..f6a94b4b 100644
--- a/libknet/transport_udp.c
+++ b/libknet/transport_udp.c
@@ -1,485 +1,485 @@
/*
* Copyright (C) 2016-2022 Red Hat, Inc. All rights reserved.
*
* Author: Christine Caulfield <ccaulfie@redhat.com>
*
* This software licensed under LGPL-2.0+
*/
#include "config.h"
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#if defined (IP_RECVERR) || defined (IPV6_RECVERR)
#include <linux/errqueue.h>
#endif
#include "libknet.h"
#include "compat.h"
#include "host.h"
#include "link.h"
#include "logging.h"
#include "common.h"
#include "netutils.h"
#include "transport_common.h"
#include "transport_udp.h"
#include "transports.h"
#include "threads_common.h"
typedef struct udp_handle_info {
struct qb_list_head links_list;
} udp_handle_info_t;
typedef struct udp_link_info {
struct qb_list_head list;
struct sockaddr_storage local_address;
int socket_fd;
int on_epoll;
} udp_link_info_t;
int udp_transport_link_set_config(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
int sock = -1;
struct epoll_event ev;
udp_link_info_t *info;
udp_handle_info_t *handle_info = knet_h->transports[KNET_TRANSPORT_UDP];
#if defined (IP_RECVERR) || defined (IPV6_RECVERR)
int value;
#endif
/*
* Only allocate a new link if the local address is different
*/
qb_list_for_each_entry(info, &handle_info->links_list, list) {
if (memcmp(&info->local_address, &kn_link->src_addr, sizeof(struct sockaddr_storage)) == 0) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Re-using existing UDP socket for new link");
kn_link->outsock = info->socket_fd;
kn_link->transport_link = info;
kn_link->transport_connected = 1;
return 0;
}
}
info = malloc(sizeof(udp_link_info_t));
if (!info) {
err = -1;
goto exit_error;
}
memset(info, 0, sizeof(udp_link_info_t));
sock = socket(kn_link->src_addr.ss_family, SOCK_DGRAM, 0);
if (sock < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to create listener socket: %s",
strerror(savederrno));
goto exit_error;
}
if (_configure_transport_socket(knet_h, sock, &kn_link->src_addr, kn_link->flags, "UDP") < 0) {
savederrno = errno;
err = -1;
goto exit_error;
}
#ifdef IP_RECVERR
if (kn_link->src_addr.ss_family == AF_INET) {
value = 1;
if (setsockopt(sock, SOL_IP, IP_RECVERR, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set RECVERR on socket: %s",
strerror(savederrno));
goto exit_error;
}
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IP_RECVERR enabled on socket: %i", sock);
}
#else
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IP_RECVERR not available in this build/platform");
#endif
#ifdef IPV6_RECVERR
if (kn_link->src_addr.ss_family == AF_INET6) {
value = 1;
if (setsockopt(sock, SOL_IPV6, IPV6_RECVERR, &value, sizeof(value)) <0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set RECVERR on socket: %s",
strerror(savederrno));
goto exit_error;
}
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IPV6_RECVERR enabled on socket: %i", sock);
}
#else
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "IPV6_RECVERR not available in this build/platform");
#endif
if (bind(sock, (struct sockaddr *)&kn_link->src_addr, sockaddr_len(&kn_link->src_addr))) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to bind listener socket: %s",
strerror(savederrno));
goto exit_error;
}
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = sock;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_ADD, sock, &ev)) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to add listener to epoll pool: %s",
strerror(savederrno));
goto exit_error;
}
info->on_epoll = 1;
if (_set_fd_tracker(knet_h, sock, KNET_TRANSPORT_UDP, 0, sockaddr_len(&kn_link->src_addr), info) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
memmove(&info->local_address, &kn_link->src_addr, sizeof(struct sockaddr_storage));
info->socket_fd = sock;
qb_list_add(&info->list, &handle_info->links_list);
kn_link->outsock = sock;
kn_link->transport_link = info;
kn_link->transport_connected = 1;
exit_error:
if (err) {
if (info) {
if (info->on_epoll) {
epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, sock, &ev);
}
free(info);
}
if (sock >= 0) {
close(sock);
}
}
errno = savederrno;
return err;
}
int udp_transport_link_clear_config(knet_handle_t knet_h, struct knet_link *kn_link)
{
int err = 0, savederrno = 0;
int found = 0;
struct knet_host *host;
int link_idx;
udp_link_info_t *info = kn_link->transport_link;
struct epoll_event ev;
for (host = knet_h->host_head; host != NULL; host = host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
if (&host->link[link_idx] == kn_link)
continue;
if (host->link[link_idx].transport_link == info) {
found = 1;
break;
}
}
}
if (found) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "UDP socket %d still in use", info->socket_fd);
savederrno = EBUSY;
err = -1;
goto exit_error;
}
if (info->on_epoll) {
memset(&ev, 0, sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = info->socket_fd;
if (epoll_ctl(knet_h->recv_from_links_epollfd, EPOLL_CTL_DEL, info->socket_fd, &ev) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to remove UDP socket from epoll poll: %s",
strerror(errno));
goto exit_error;
}
info->on_epoll = 0;
}
if (_set_fd_tracker(knet_h, info->socket_fd, KNET_MAX_TRANSPORTS, 0, sockaddr_len(&kn_link->src_addr), NULL) < 0) {
savederrno = errno;
err = -1;
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Unable to set fd tracker: %s",
strerror(savederrno));
goto exit_error;
}
close(info->socket_fd);
qb_list_del(&info->list);
free(kn_link->transport_link);
exit_error:
errno = savederrno;
return err;
}
int udp_transport_free(knet_handle_t knet_h)
{
udp_handle_info_t *handle_info;
if (!knet_h->transports[KNET_TRANSPORT_UDP]) {
errno = EINVAL;
return -1;
}
handle_info = knet_h->transports[KNET_TRANSPORT_UDP];
/*
* keep it here while we debug list usage and such
*/
if (!qb_list_empty(&handle_info->links_list)) {
log_err(knet_h, KNET_SUB_TRANSP_UDP, "Internal error. handle list is not empty");
return -1;
}
free(handle_info);
knet_h->transports[KNET_TRANSPORT_UDP] = NULL;
return 0;
}
int udp_transport_init(knet_handle_t knet_h)
{
udp_handle_info_t *handle_info;
if (knet_h->transports[KNET_TRANSPORT_UDP]) {
errno = EEXIST;
return -1;
}
handle_info = malloc(sizeof(udp_handle_info_t));
if (!handle_info) {
return -1;
}
memset(handle_info, 0, sizeof(udp_handle_info_t));
knet_h->transports[KNET_TRANSPORT_UDP] = handle_info;
qb_list_init(&handle_info->links_list);
return 0;
}
#if defined (IP_RECVERR) || defined (IPV6_RECVERR)
static int read_errs_from_sock(knet_handle_t knet_h, int sockfd)
{
int err = 0, savederrno = 0;
int got_err = 0;
char buffer[1024];
struct iovec iov;
struct msghdr msg;
struct cmsghdr *cmsg;
struct sock_extended_err *sock_err;
struct icmphdr icmph;
struct sockaddr_storage remote;
struct sockaddr_storage *origin;
char addr_str[KNET_MAX_HOST_LEN];
char port_str[KNET_MAX_PORT_LEN];
char addr_remote_str[KNET_MAX_HOST_LEN];
char port_remote_str[KNET_MAX_PORT_LEN];
iov.iov_base = &icmph;
iov.iov_len = sizeof(icmph);
msg.msg_name = (void*)&remote;
msg.msg_namelen = sizeof(remote);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
msg.msg_control = buffer;
msg.msg_controllen = sizeof(buffer);
for (;;) {
err = recvmsg(sockfd, &msg, MSG_ERRQUEUE);
savederrno = errno;
if (err < 0) {
if (!got_err) {
errno = savederrno;
return -1;
} else {
return 0;
}
}
got_err = 1;
for (cmsg = CMSG_FIRSTHDR(&msg);cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_RECVERR)) ||
((cmsg->cmsg_level == SOL_IPV6 && (cmsg->cmsg_type == IPV6_RECVERR)))) {
sock_err = (struct sock_extended_err*)(void *)CMSG_DATA(cmsg);
if (sock_err) {
switch (sock_err->ee_origin) {
case SO_EE_ORIGIN_NONE: /* no origin */
case SO_EE_ORIGIN_LOCAL: /* local source (EMSGSIZE) */
if (sock_err->ee_errno == EMSGSIZE) {
if (pthread_mutex_lock(&knet_h->kmtu_mutex) != 0) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Unable to get mutex lock");
knet_h->kernel_mtu = 0;
break;
} else {
knet_h->kernel_mtu = sock_err->ee_info;
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "detected kernel MTU: %u", knet_h->kernel_mtu);
pthread_mutex_unlock(&knet_h->kmtu_mutex);
}
- force_pmtud_run(knet_h, KNET_SUB_TRANSP_UDP, 0);
+ force_pmtud_run(knet_h, KNET_SUB_TRANSP_UDP, 0, 0);
}
/*
* those errors are way too noisy
*/
break;
case SO_EE_ORIGIN_ICMP: /* ICMP */
case SO_EE_ORIGIN_ICMP6: /* ICMP6 */
origin = (struct sockaddr_storage *)(void *)SO_EE_OFFENDER(sock_err);
if (knet_addrtostr(origin, sizeof(*origin),
addr_str, KNET_MAX_HOST_LEN,
port_str, KNET_MAX_PORT_LEN) < 0) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from unknown source: %s", strerror(sock_err->ee_errno));
} else {
if (knet_addrtostr(&remote, sizeof(remote),
addr_remote_str, KNET_MAX_HOST_LEN,
port_remote_str, KNET_MAX_PORT_LEN) < 0) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from %s: %s destination unknown", addr_str, strerror(sock_err->ee_errno));
} else {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Received ICMP error from %s: %s %s", addr_str, strerror(sock_err->ee_errno), addr_remote_str);
if ((sock_err->ee_errno == ECONNREFUSED) || /* knet is not running on the other node */
(sock_err->ee_errno == ECONNABORTED) || /* local kernel closed the socket */
(sock_err->ee_errno == ENONET) || /* network does not exist */
(sock_err->ee_errno == ENETUNREACH) || /* network unreachable */
(sock_err->ee_errno == EHOSTUNREACH) || /* host unreachable */
(sock_err->ee_errno == EHOSTDOWN) || /* host down (from kernel/net/ipv4/icmp.c */
(sock_err->ee_errno == ENETDOWN)) { /* network down */
struct knet_host *host = NULL;
struct knet_link *kn_link = NULL;
int link_idx, found = 0;
for (host = knet_h->host_head; host != NULL; host = host->next) {
for (link_idx = 0; link_idx < KNET_MAX_LINK; link_idx++) {
kn_link = &host->link[link_idx];
if (kn_link->outsock == sockfd) {
if (!cmpaddr(&remote, &kn_link->dst_addr)) {
found = 1;
break;
}
}
}
if (found) {
break;
}
}
if ((host) && (kn_link) &&
(kn_link->status.connected)) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Setting down host %u link %i", host->host_id, kn_link->link_id);
/*
* setting transport_connected = 0 will trigger
* thread_heartbeat link_down process.
*
* the process terminates calling into transport_link_down
* below that will set transport_connected = 1
*/
kn_link->transport_connected = 0;
}
}
}
}
break;
}
} else {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "No data in MSG_ERRQUEUE");
}
}
}
}
}
#else
static int read_errs_from_sock(knet_handle_t knet_h, int sockfd)
{
return 0;
}
#endif
int udp_transport_rx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
{
if (recv_errno == EAGAIN) {
read_errs_from_sock(knet_h, sockfd);
}
return 0;
}
transport_sock_error_t udp_transport_tx_sock_error(knet_handle_t knet_h, int sockfd, int recv_err, int recv_errno)
{
if (recv_err < 0) {
if (recv_errno == EMSGSIZE) {
read_errs_from_sock(knet_h, sockfd);
return KNET_TRANSPORT_SOCK_ERROR_IGNORE;
}
if ((recv_errno == EINVAL) || (recv_errno == EPERM) ||
(recv_errno == ENETUNREACH) || (recv_errno == ENETDOWN) ||
(recv_errno == EHOSTUNREACH)) {
#ifdef DEBUG
if ((recv_errno == ENETUNREACH) || (recv_errno == ENETDOWN)) {
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Sock: %d is unreachable.", sockfd);
}
#endif
return KNET_TRANSPORT_SOCK_ERROR_INTERNAL;
}
if ((recv_errno == ENOBUFS) || (recv_errno == EAGAIN)) {
#ifdef DEBUG
log_debug(knet_h, KNET_SUB_TRANSP_UDP, "Sock: %d is overloaded. Slowing TX down", sockfd);
#endif
usleep(knet_h->threads_timer_res / 16);
} else {
read_errs_from_sock(knet_h, sockfd);
}
return KNET_TRANSPORT_SOCK_ERROR_RETRY;
}
return KNET_TRANSPORT_SOCK_ERROR_IGNORE;
}
transport_rx_isdata_t udp_transport_rx_is_data(knet_handle_t knet_h, int sockfd, struct knet_mmsghdr *msg)
{
if (msg->msg_len == 0)
return KNET_TRANSPORT_RX_NOT_DATA_CONTINUE;
return KNET_TRANSPORT_RX_IS_DATA;
}
int udp_transport_link_dyn_connect(knet_handle_t knet_h, int sockfd, struct knet_link *kn_link)
{
kn_link->status.dynconnected = 1;
return 0;
}
int udp_transport_link_is_down(knet_handle_t knet_h, struct knet_link *kn_link)
{
/*
* see comments about handling ICMP error messages
*/
kn_link->transport_connected = 1;
return 0;
}

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