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openmpi/ompi/mca/btl/tcp/btl_tcp_endpoint.c
George Bosilca c9e5ab9ed1 Our macros for the OMPI-level free list had one extra argument, a possible return 
value to signal that the operation of retrieving the element from the free list
failed. However in this case the returned pointer was set to NULL as well, so the
error code was redundant. Moreover, this was a continuous source of warnings when
the picky mode is on.

The attached parch remove the rc argument from the OMPI_FREE_LIST_GET and
OMPI_FREE_LIST_WAIT macros, and change to check if the item is NULL instead of
using the return code.

This commit was SVN r28722.
2013-07-04 08:34:37 +00:00

848 строки
31 KiB
C
Исходник Ответственный История

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2013 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2007-2008 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2013 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
*/
#include "ompi_config.h"
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "opal/opal_socket_errno.h"
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif /* HAVE_SYS_TIME_H */
#ifdef HAVE_TIME_H
#include <time.h>
#endif /* HAVE_TIME_H */
#include "opal/mca/event/event.h"
#include "opal/util/net.h"
#include "opal/util/show_help.h"
#include "ompi/types.h"
#include "ompi/mca/btl/base/btl_base_error.h"
#include "ompi/mca/rte/rte.h"
#include "btl_tcp.h"
#include "btl_tcp_endpoint.h"
#include "btl_tcp_proc.h"
#include "btl_tcp_frag.h"
#include "btl_tcp_addr.h"
/*
* Initialize state of the endpoint instance.
*
*/
static void mca_btl_tcp_endpoint_construct(mca_btl_tcp_endpoint_t* endpoint)
{
endpoint->endpoint_btl = NULL;
endpoint->endpoint_proc = NULL;
endpoint->endpoint_addr = NULL;
endpoint->endpoint_sd = -1;
endpoint->endpoint_send_frag = 0;
endpoint->endpoint_recv_frag = 0;
endpoint->endpoint_state = MCA_BTL_TCP_CLOSED;
endpoint->endpoint_retries = 0;
endpoint->endpoint_nbo = false;
#if MCA_BTL_TCP_ENDPOINT_CACHE
endpoint->endpoint_cache = NULL;
endpoint->endpoint_cache_pos = NULL;
endpoint->endpoint_cache_length = 0;
#endif /* MCA_BTL_TCP_ENDPOINT_CACHE */
OBJ_CONSTRUCT(&endpoint->endpoint_frags, opal_list_t);
OBJ_CONSTRUCT(&endpoint->endpoint_send_lock, opal_mutex_t);
OBJ_CONSTRUCT(&endpoint->endpoint_recv_lock, opal_mutex_t);
}
/*
* Destroy a endpoint
*
*/
static void mca_btl_tcp_endpoint_destruct(mca_btl_tcp_endpoint_t* endpoint)
{
mca_btl_tcp_proc_remove(endpoint->endpoint_proc, endpoint);
mca_btl_tcp_endpoint_close(endpoint);
OBJ_DESTRUCT(&endpoint->endpoint_frags);
OBJ_DESTRUCT(&endpoint->endpoint_send_lock);
OBJ_DESTRUCT(&endpoint->endpoint_recv_lock);
}
OBJ_CLASS_INSTANCE(
mca_btl_tcp_endpoint_t,
opal_list_item_t,
mca_btl_tcp_endpoint_construct,
mca_btl_tcp_endpoint_destruct);
static void mca_btl_tcp_endpoint_construct(mca_btl_base_endpoint_t* btl_endpoint);
static void mca_btl_tcp_endpoint_destruct(mca_btl_base_endpoint_t* btl_endpoint);
static int mca_btl_tcp_endpoint_start_connect(mca_btl_base_endpoint_t*);
static void mca_btl_tcp_endpoint_connected(mca_btl_base_endpoint_t*);
static void mca_btl_tcp_endpoint_recv_handler(int sd, short flags, void* user);
static void mca_btl_tcp_endpoint_send_handler(int sd, short flags, void* user);
/*
* Diagnostics: change this to "1" to enable the function
* mca_btl_tcp_endpoint_dump(), below
*/
#define WANT_PEER_DUMP 0
/*
* diagnostics
*/
#if WANT_PEER_DUMP
static void mca_btl_tcp_endpoint_dump(mca_btl_base_endpoint_t* btl_endpoint, const char* msg)
{
char src[64];
char dst[64];
int sndbuf,rcvbuf,nodelay,flags;
#if OPAL_WANT_IPV6
struct sockaddr_storage inaddr;
#else
struct sockaddr_in inaddr;
#endif
opal_socklen_t obtlen;
opal_socklen_t addrlen = sizeof(inaddr);
getsockname(btl_endpoint->endpoint_sd, (struct sockaddr*)&inaddr, &addrlen);
#if OPAL_WANT_IPV6
{
char *address;
address = (char *) opal_net_get_hostname((struct sockaddr*) &inaddr);
if (NULL != address) {
sprintf(src, "%s", address);
}
}
#else
sprintf(src, "%s", inet_ntoa(inaddr.sin_addr));
#endif
getpeername(btl_endpoint->endpoint_sd, (struct sockaddr*)&inaddr, &addrlen);
#if OPAL_WANT_IPV6
{
char *address;
address = (char *) opal_net_get_hostname ((struct sockaddr*) &inaddr);
if (NULL != address) {
sprintf(dst, "%s", address);
}
}
#else
sprintf(dst, "%s", inet_ntoa(inaddr.sin_addr));
#endif
if((flags = fcntl(btl_endpoint->endpoint_sd, F_GETFL, 0)) < 0) {
BTL_ERROR(("fcntl(F_GETFL) failed: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
#if defined(SO_SNDBUF)
obtlen = sizeof(sndbuf);
if(getsockopt(btl_endpoint->endpoint_sd, SOL_SOCKET, SO_SNDBUF, (char *)&sndbuf, &obtlen) < 0) {
BTL_ERROR(("SO_SNDBUF option: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
#else
sndbuf = -1;
#endif
#if defined(SO_RCVBUF)
obtlen = sizeof(rcvbuf);
if(getsockopt(btl_endpoint->endpoint_sd, SOL_SOCKET, SO_RCVBUF, (char *)&rcvbuf, &obtlen) < 0) {
BTL_ERROR(("SO_RCVBUF option: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
#else
rcvbuf = -1;
#endif
#if defined(TCP_NODELAY)
obtlen = sizeof(nodelay);
if(getsockopt(btl_endpoint->endpoint_sd, IPPROTO_TCP, TCP_NODELAY, (char *)&nodelay, &obtlen) < 0) {
BTL_ERROR(("TCP_NODELAY option: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
#else
nodelay = 0;
#endif
BTL_VERBOSE(("%s: %s - %s nodelay %d sndbuf %d rcvbuf %d flags %08x",
msg, src, dst, nodelay, sndbuf, rcvbuf, flags));
}
#endif
/*
* Initialize events to be used by the endpoint instance for TCP select/poll callbacks.
*/
static inline void mca_btl_tcp_endpoint_event_init(mca_btl_base_endpoint_t* btl_endpoint)
{
#if MCA_BTL_TCP_ENDPOINT_CACHE
btl_endpoint->endpoint_cache = (char*)malloc(mca_btl_tcp_component.tcp_endpoint_cache);
btl_endpoint->endpoint_cache_pos = btl_endpoint->endpoint_cache;
#endif /* MCA_BTL_TCP_ENDPOINT_CACHE */
opal_event_set(opal_event_base, &btl_endpoint->endpoint_recv_event,
btl_endpoint->endpoint_sd,
OPAL_EV_READ|OPAL_EV_PERSIST,
mca_btl_tcp_endpoint_recv_handler,
btl_endpoint );
/**
* The send event should be non persistent until the endpoint is
* completely connected. This means, when the event is created it
* will be fired only once, and when the endpoint is marked as
* CONNECTED the event should be recreated with the correct flags.
*/
opal_event_set(opal_event_base, &btl_endpoint->endpoint_send_event,
btl_endpoint->endpoint_sd,
OPAL_EV_WRITE,
mca_btl_tcp_endpoint_send_handler,
btl_endpoint);
}
/*
* Attempt to send a fragment using a given endpoint. If the endpoint is not connected,
* queue the fragment and start the connection as required.
*/
int mca_btl_tcp_endpoint_send(mca_btl_base_endpoint_t* btl_endpoint, mca_btl_tcp_frag_t* frag)
{
int rc = OMPI_SUCCESS;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
switch(btl_endpoint->endpoint_state) {
case MCA_BTL_TCP_CONNECTING:
case MCA_BTL_TCP_CONNECT_ACK:
case MCA_BTL_TCP_CLOSED:
opal_list_append(&btl_endpoint->endpoint_frags, (opal_list_item_t*)frag);
frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
if(btl_endpoint->endpoint_state == MCA_BTL_TCP_CLOSED)
rc = mca_btl_tcp_endpoint_start_connect(btl_endpoint);
break;
case MCA_BTL_TCP_FAILED:
rc = OMPI_ERR_UNREACH;
break;
case MCA_BTL_TCP_CONNECTED:
if (btl_endpoint->endpoint_send_frag == NULL) {
if(frag->base.des_flags & MCA_BTL_DES_FLAGS_PRIORITY &&
mca_btl_tcp_frag_send(frag, btl_endpoint->endpoint_sd)) {
int btl_ownership = (frag->base.des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
if( frag->base.des_flags & MCA_BTL_DES_SEND_ALWAYS_CALLBACK ) {
frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc);
}
if( btl_ownership ) {
MCA_BTL_TCP_FRAG_RETURN(frag);
}
return 1;
} else {
btl_endpoint->endpoint_send_frag = frag;
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
}
} else {
frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
opal_list_append(&btl_endpoint->endpoint_frags, (opal_list_item_t*)frag);
}
break;
}
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
return rc;
}
/*
* A blocking send on a non-blocking socket. Used to send the small amount of connection
* information that identifies the endpoints endpoint.
*/
static int mca_btl_tcp_endpoint_send_blocking(mca_btl_base_endpoint_t* btl_endpoint, void* data, size_t size)
{
unsigned char* ptr = (unsigned char*)data;
size_t cnt = 0;
while(cnt < size) {
int retval = send(btl_endpoint->endpoint_sd, (const char *)ptr+cnt, size-cnt, 0);
if(retval < 0) {
if(opal_socket_errno != EINTR && opal_socket_errno != EAGAIN && opal_socket_errno != EWOULDBLOCK) {
BTL_ERROR(("send() failed: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
btl_endpoint->endpoint_state = MCA_BTL_TCP_FAILED;
mca_btl_tcp_endpoint_close(btl_endpoint);
return -1;
}
continue;
}
cnt += retval;
}
return cnt;
}
/*
* Send the globally unique identifier for this process to a endpoint on
* a newly connected socket.
*/
static int mca_btl_tcp_endpoint_send_connect_ack(mca_btl_base_endpoint_t* btl_endpoint)
{
/* send process identifier to remote endpoint */
mca_btl_tcp_proc_t* btl_proc = mca_btl_tcp_proc_local();
ompi_process_name_t guid = btl_proc->proc_ompi->proc_name;
OMPI_PROCESS_NAME_HTON(guid);
if(mca_btl_tcp_endpoint_send_blocking(btl_endpoint, &guid, sizeof(guid)) !=
sizeof(guid)) {
return OMPI_ERR_UNREACH;
}
return OMPI_SUCCESS;
}
/*
* Check the state of this endpoint. If the incoming connection request matches
* our endpoints address, check the state of our connection:
* (1) if a connection has not been attempted, accept the connection
* (2) if a connection has not been established, and the endpoints process identifier
* is less than the local process, accept the connection
* otherwise, reject the connection and continue with the current connection
*/
bool mca_btl_tcp_endpoint_accept(mca_btl_base_endpoint_t* btl_endpoint,
struct sockaddr* addr, int sd)
{
mca_btl_tcp_proc_t* this_proc = mca_btl_tcp_proc_local();
mca_btl_tcp_proc_t *endpoint_proc = btl_endpoint->endpoint_proc;
int cmpval;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_recv_lock);
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
if(NULL == btl_endpoint->endpoint_addr) {
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return false;
}
cmpval = ompi_rte_compare_name_fields(OMPI_RTE_CMP_ALL,
&endpoint_proc->proc_ompi->proc_name,
&this_proc->proc_ompi->proc_name);
if((btl_endpoint->endpoint_sd < 0) ||
(btl_endpoint->endpoint_state != MCA_BTL_TCP_CONNECTED &&
cmpval < 0)) {
mca_btl_tcp_endpoint_close(btl_endpoint);
btl_endpoint->endpoint_sd = sd;
if(mca_btl_tcp_endpoint_send_connect_ack(btl_endpoint) != OMPI_SUCCESS) {
btl_endpoint->endpoint_state = MCA_BTL_TCP_FAILED;
mca_btl_tcp_endpoint_close(btl_endpoint);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return false;
}
mca_btl_tcp_endpoint_event_init(btl_endpoint);
opal_event_add(&btl_endpoint->endpoint_recv_event, 0);
mca_btl_tcp_endpoint_connected(btl_endpoint);
#if OPAL_ENABLE_DEBUG && WANT_PEER_DUMP
mca_btl_tcp_endpoint_dump(btl_endpoint, "accepted");
#endif
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return true;
}
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return false;
}
/*
* Remove any event registrations associated with the socket
* and update the endpoint state to reflect the connection has
* been closed.
*/
void mca_btl_tcp_endpoint_close(mca_btl_base_endpoint_t* btl_endpoint)
{
if(btl_endpoint->endpoint_sd < 0)
return;
btl_endpoint->endpoint_retries++;
opal_event_del(&btl_endpoint->endpoint_recv_event);
opal_event_del(&btl_endpoint->endpoint_send_event);
CLOSE_THE_SOCKET(btl_endpoint->endpoint_sd);
btl_endpoint->endpoint_sd = -1;
#if MCA_BTL_TCP_ENDPOINT_CACHE
free( btl_endpoint->endpoint_cache );
btl_endpoint->endpoint_cache = NULL;
btl_endpoint->endpoint_cache_pos = NULL;
btl_endpoint->endpoint_cache_length = 0;
#endif /* MCA_BTL_TCP_ENDPOINT_CACHE */
/**
* If we keep failing to connect to the peer let the caller know about
* this situation by triggering all the pending fragments callback and
* reporting the error.
*/
if( MCA_BTL_TCP_FAILED == btl_endpoint->endpoint_state ) {
mca_btl_tcp_frag_t* frag = btl_endpoint->endpoint_send_frag;
if( NULL == frag )
frag = (mca_btl_tcp_frag_t*)opal_list_remove_first(&btl_endpoint->endpoint_frags);
while(NULL != frag) {
frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, OMPI_ERR_UNREACH);
frag = (mca_btl_tcp_frag_t*)opal_list_remove_first(&btl_endpoint->endpoint_frags);
}
} else {
btl_endpoint->endpoint_state = MCA_BTL_TCP_CLOSED;
}
}
/*
* Setup endpoint state to reflect that connection has been established,
* and start any pending sends. This function should be called with the
* send lock locked.
*/
static void mca_btl_tcp_endpoint_connected(mca_btl_base_endpoint_t* btl_endpoint)
{
/* setup socket options */
btl_endpoint->endpoint_state = MCA_BTL_TCP_CONNECTED;
btl_endpoint->endpoint_retries = 0;
/* Create the send event in a persistent manner. */
opal_event_set(opal_event_base, &btl_endpoint->endpoint_send_event,
btl_endpoint->endpoint_sd,
OPAL_EV_WRITE | OPAL_EV_PERSIST,
mca_btl_tcp_endpoint_send_handler,
btl_endpoint );
if(opal_list_get_size(&btl_endpoint->endpoint_frags) > 0) {
if(NULL == btl_endpoint->endpoint_send_frag)
btl_endpoint->endpoint_send_frag = (mca_btl_tcp_frag_t*)
opal_list_remove_first(&btl_endpoint->endpoint_frags);
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
}
}
/*
* A blocking recv on a non-blocking socket. Used to receive the small amount of connection
* information that identifies the endpoints endpoint.
*/
static int mca_btl_tcp_endpoint_recv_blocking(mca_btl_base_endpoint_t* btl_endpoint, void* data, size_t size)
{
unsigned char* ptr = (unsigned char*)data;
size_t cnt = 0;
while(cnt < size) {
int retval = recv(btl_endpoint->endpoint_sd, (char *)ptr+cnt, size-cnt, 0);
/* remote closed connection */
if(retval == 0) {
mca_btl_tcp_endpoint_close(btl_endpoint);
return cnt;
}
/* socket is non-blocking so handle errors */
if(retval < 0) {
if(opal_socket_errno != EINTR && opal_socket_errno != EAGAIN && opal_socket_errno != EWOULDBLOCK) {
BTL_ERROR(("recv(%d) failed: %s (%d)",
btl_endpoint->endpoint_sd, strerror(opal_socket_errno), opal_socket_errno));
btl_endpoint->endpoint_state = MCA_BTL_TCP_FAILED;
mca_btl_tcp_endpoint_close(btl_endpoint);
return -1;
}
continue;
}
cnt += retval;
}
return cnt;
}
/*
* Receive the endpoints globally unique process identification from a newly
* connected socket and verify the expected response. If so, move the
* socket to a connected state.
*/
static int mca_btl_tcp_endpoint_recv_connect_ack(mca_btl_base_endpoint_t* btl_endpoint)
{
size_t s;
ompi_process_name_t guid;
mca_btl_tcp_proc_t* btl_proc = btl_endpoint->endpoint_proc;
s = mca_btl_tcp_endpoint_recv_blocking(btl_endpoint,
&guid, sizeof(ompi_process_name_t));
if (s != sizeof(ompi_process_name_t)) {
if (0 == s) {
/* If we get zero bytes, the peer closed the socket. This
can happen when the two peers started the connection
protocol simultaneously. Just report the problem
upstream. */
return OMPI_ERROR;
}
opal_show_help("help-mpi-btl-tcp.txt", "client handshake fail",
true, ompi_process_info.nodename,
ompi_process_info.pid,
"did not receive entire connect ACK from peer");
return OMPI_ERR_UNREACH;
}
OMPI_PROCESS_NAME_NTOH(guid);
/* compare this to the expected values */
if (OPAL_EQUAL != ompi_rte_compare_name_fields(OMPI_RTE_CMP_ALL,
&btl_proc->proc_ompi->proc_name,
&guid)) {
BTL_ERROR(("received unexpected process identifier %s",
OMPI_NAME_PRINT(&guid)));
mca_btl_tcp_endpoint_close(btl_endpoint);
return OMPI_ERR_UNREACH;
}
return OMPI_SUCCESS;
}
void mca_btl_tcp_set_socket_options(int sd)
{
int optval;
#if defined(TCP_NODELAY)
optval = mca_btl_tcp_component.tcp_not_use_nodelay;
if(setsockopt(sd, IPPROTO_TCP, TCP_NODELAY, (char *)&optval, sizeof(optval)) < 0) {
BTL_ERROR(("setsockopt(TCP_NODELAY) failed: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
#endif
#if defined(SO_SNDBUF)
if(mca_btl_tcp_component.tcp_sndbuf > 0 &&
setsockopt(sd, SOL_SOCKET, SO_SNDBUF, (char *)&mca_btl_tcp_component.tcp_sndbuf, sizeof(int)) < 0) {
BTL_ERROR(("setsockopt(SO_SNDBUF) failed: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
#endif
#if defined(SO_RCVBUF)
if(mca_btl_tcp_component.tcp_rcvbuf > 0 &&
setsockopt(sd, SOL_SOCKET, SO_RCVBUF, (char *)&mca_btl_tcp_component.tcp_rcvbuf, sizeof(int)) < 0) {
BTL_ERROR(("setsockopt(SO_RCVBUF) failed: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
#endif
}
/*
* Start a connection to the endpoint. This will likely not complete,
* as the socket is set to non-blocking, so register for event
* notification of connect completion. On connection we send
* our globally unique process identifier to the endpoint and wait for
* the endpoints response.
*/
static int mca_btl_tcp_endpoint_start_connect(mca_btl_base_endpoint_t* btl_endpoint)
{
int rc,flags;
struct sockaddr_storage endpoint_addr;
/* By default consider a IPv4 connection */
uint16_t af_family = AF_INET;
opal_socklen_t addrlen = sizeof(struct sockaddr_in);
#if OPAL_WANT_IPV6
if (AF_INET6 == btl_endpoint->endpoint_addr->addr_family) {
af_family = AF_INET6;
addrlen = sizeof (struct sockaddr_in6);
}
#endif
btl_endpoint->endpoint_sd = socket(af_family, SOCK_STREAM, 0);
if (btl_endpoint->endpoint_sd < 0) {
btl_endpoint->endpoint_retries++;
return OMPI_ERR_UNREACH;
}
/* setup socket buffer sizes */
mca_btl_tcp_set_socket_options(btl_endpoint->endpoint_sd);
/* setup event callbacks */
mca_btl_tcp_endpoint_event_init(btl_endpoint);
/* setup the socket as non-blocking */
if((flags = fcntl(btl_endpoint->endpoint_sd, F_GETFL, 0)) < 0) {
BTL_ERROR(("fcntl(F_GETFL) failed: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
} else {
flags |= O_NONBLOCK;
if(fcntl(btl_endpoint->endpoint_sd, F_SETFL, flags) < 0)
BTL_ERROR(("fcntl(F_SETFL) failed: %s (%d)",
strerror(opal_socket_errno), opal_socket_errno));
}
/* start the connect - will likely fail with EINPROGRESS */
mca_btl_tcp_proc_tosocks(btl_endpoint->endpoint_addr, &endpoint_addr);
opal_output_verbose(20, ompi_btl_base_framework.framework_output,
"btl: tcp: attempting to connect() to %s address %s on port %d",
OMPI_NAME_PRINT(&btl_endpoint->endpoint_proc->proc_ompi->proc_name),
opal_net_get_hostname((struct sockaddr*) &endpoint_addr),
ntohs(btl_endpoint->endpoint_addr->addr_port));
if(connect(btl_endpoint->endpoint_sd, (struct sockaddr*)&endpoint_addr, addrlen) < 0) {
/* non-blocking so wait for completion */
if(opal_socket_errno == EINPROGRESS || opal_socket_errno == EWOULDBLOCK) {
btl_endpoint->endpoint_state = MCA_BTL_TCP_CONNECTING;
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
return OMPI_SUCCESS;
}
{
char *address;
address = opal_net_get_hostname((struct sockaddr*) &endpoint_addr);
BTL_PEER_ERROR( btl_endpoint->endpoint_proc->proc_ompi,
( "Unable to connect to the peer %s on port %d: %s\n",
address,
btl_endpoint->endpoint_addr->addr_port, strerror(opal_socket_errno) ) );
}
btl_endpoint->endpoint_state = MCA_BTL_TCP_FAILED;
mca_btl_tcp_endpoint_close(btl_endpoint);
btl_endpoint->endpoint_retries++;
return OMPI_ERR_UNREACH;
}
/* send our globally unique process identifier to the endpoint */
if((rc = mca_btl_tcp_endpoint_send_connect_ack(btl_endpoint)) == OMPI_SUCCESS) {
btl_endpoint->endpoint_state = MCA_BTL_TCP_CONNECT_ACK;
opal_event_add(&btl_endpoint->endpoint_recv_event, 0);
} else {
btl_endpoint->endpoint_state = MCA_BTL_TCP_FAILED;
mca_btl_tcp_endpoint_close(btl_endpoint);
}
return rc;
}
/*
* Check the status of the connection. If the connection failed, will retry
* later. Otherwise, send this processes identifier to the endpoint on the
* newly connected socket.
*/
static void mca_btl_tcp_endpoint_complete_connect(mca_btl_base_endpoint_t* btl_endpoint)
{
int so_error = 0;
opal_socklen_t so_length = sizeof(so_error);
struct sockaddr_storage endpoint_addr;
mca_btl_tcp_proc_tosocks(btl_endpoint->endpoint_addr, &endpoint_addr);
/* unregister from receiving event notifications */
opal_event_del(&btl_endpoint->endpoint_send_event);
/* check connect completion status */
if(getsockopt(btl_endpoint->endpoint_sd, SOL_SOCKET, SO_ERROR, (char *)&so_error, &so_length) < 0) {
BTL_ERROR(("getsockopt() to %s failed: %s (%d)",
opal_net_get_hostname((struct sockaddr*) &endpoint_addr),
strerror(opal_socket_errno), opal_socket_errno));
mca_btl_tcp_endpoint_close(btl_endpoint);
return;
}
if(so_error == EINPROGRESS || so_error == EWOULDBLOCK) {
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
return;
}
if(so_error != 0) {
BTL_ERROR(("connect() to %s failed: %s (%d)",
opal_net_get_hostname((struct sockaddr*) &endpoint_addr),
strerror(so_error), so_error));
mca_btl_tcp_endpoint_close(btl_endpoint);
return;
}
if(mca_btl_tcp_endpoint_send_connect_ack(btl_endpoint) == OMPI_SUCCESS) {
btl_endpoint->endpoint_state = MCA_BTL_TCP_CONNECT_ACK;
opal_event_add(&btl_endpoint->endpoint_recv_event, 0);
} else {
btl_endpoint->endpoint_state = MCA_BTL_TCP_FAILED;
mca_btl_tcp_endpoint_close(btl_endpoint);
}
}
/*
* A file descriptor is available/ready for recv. Check the state
* of the socket and take the appropriate action.
*/
static void mca_btl_tcp_endpoint_recv_handler(int sd, short flags, void* user)
{
mca_btl_base_endpoint_t* btl_endpoint = (mca_btl_base_endpoint_t *)user;
/* Make sure we don't have a race between a thread that remove the
* recv event, and one event already scheduled.
*/
if( sd != btl_endpoint->endpoint_sd )
return;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_recv_lock);
switch(btl_endpoint->endpoint_state) {
case MCA_BTL_TCP_CONNECT_ACK:
{
int rc = OMPI_ERROR;
rc = mca_btl_tcp_endpoint_recv_connect_ack(btl_endpoint);
if( OMPI_SUCCESS == rc ) {
/* we are now connected. Start sending the data */
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
mca_btl_tcp_endpoint_connected(btl_endpoint);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
#if OPAL_ENABLE_DEBUG && WANT_PEER_DUMP
mca_btl_tcp_endpoint_dump(btl_endpoint, "connected");
#endif
}
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return;
}
case MCA_BTL_TCP_CONNECTED:
{
mca_btl_tcp_frag_t* frag;
frag = btl_endpoint->endpoint_recv_frag;
if(NULL == frag) {
if(mca_btl_tcp_module.super.btl_max_send_size >
mca_btl_tcp_module.super.btl_eager_limit) {
MCA_BTL_TCP_FRAG_ALLOC_MAX(frag);
} else {
MCA_BTL_TCP_FRAG_ALLOC_EAGER(frag);
}
if(NULL == frag) {
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return;
}
MCA_BTL_TCP_FRAG_INIT_DST(frag, btl_endpoint);
}
#if MCA_BTL_TCP_ENDPOINT_CACHE
assert( 0 == btl_endpoint->endpoint_cache_length );
data_still_pending_on_endpoint:
#endif /* MCA_BTL_TCP_ENDPOINT_CACHE */
/* check for completion of non-blocking recv on the current fragment */
if(mca_btl_tcp_frag_recv(frag, btl_endpoint->endpoint_sd) == false) {
btl_endpoint->endpoint_recv_frag = frag;
} else {
btl_endpoint->endpoint_recv_frag = NULL;
if( MCA_BTL_TCP_HDR_TYPE_SEND == frag->hdr.type ) {
mca_btl_active_message_callback_t* reg;
reg = mca_btl_base_active_message_trigger + frag->hdr.base.tag;
reg->cbfunc(&frag->btl->super, frag->hdr.base.tag, &frag->base, reg->cbdata);
}
#if MCA_BTL_TCP_ENDPOINT_CACHE
if( 0 != btl_endpoint->endpoint_cache_length ) {
/* If the cache still contain some data we can reuse the same fragment
* until we flush it completly.
*/
MCA_BTL_TCP_FRAG_INIT_DST(frag, btl_endpoint);
goto data_still_pending_on_endpoint;
}
#endif /* MCA_BTL_TCP_ENDPOINT_CACHE */
MCA_BTL_TCP_FRAG_RETURN(frag);
}
#if MCA_BTL_TCP_ENDPOINT_CACHE
assert( 0 == btl_endpoint->endpoint_cache_length );
#endif /* MCA_BTL_TCP_ENDPOINT_CACHE */
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
break;
}
case MCA_BTL_TCP_CLOSED:
/* This is a thread-safety issue. As multiple threads are allowed
* to generate events (in the lib event) we endup with several
* threads executing the receive callback, when we reach the end
* of the MPI_Finalize. The first one will close the connections,
* and all others will complain.
*/
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
break;
default:
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
BTL_ERROR(("invalid socket state(%d)", btl_endpoint->endpoint_state));
btl_endpoint->endpoint_state = MCA_BTL_TCP_FAILED;
mca_btl_tcp_endpoint_close(btl_endpoint);
break;
}
}
/*
* A file descriptor is available/ready for send. Check the state
* of the socket and take the appropriate action.
*/
static void mca_btl_tcp_endpoint_send_handler(int sd, short flags, void* user)
{
mca_btl_tcp_endpoint_t* btl_endpoint = (mca_btl_tcp_endpoint_t *)user;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
switch(btl_endpoint->endpoint_state) {
case MCA_BTL_TCP_CONNECTING:
mca_btl_tcp_endpoint_complete_connect(btl_endpoint);
break;
case MCA_BTL_TCP_CONNECTED:
/* complete the current send */
while (NULL != btl_endpoint->endpoint_send_frag) {
mca_btl_tcp_frag_t* frag = btl_endpoint->endpoint_send_frag;
int btl_ownership = (frag->base.des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP);
if(mca_btl_tcp_frag_send(frag, btl_endpoint->endpoint_sd) == false) {
break;
}
/* progress any pending sends */
btl_endpoint->endpoint_send_frag = (mca_btl_tcp_frag_t*)
opal_list_remove_first(&btl_endpoint->endpoint_frags);
/* if required - update request status and release fragment */
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
assert( frag->base.des_flags & MCA_BTL_DES_SEND_ALWAYS_CALLBACK );
frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc);
if( btl_ownership ) {
MCA_BTL_TCP_FRAG_RETURN(frag);
}
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
}
/* if nothing else to do unregister for send event notifications */
if(NULL == btl_endpoint->endpoint_send_frag) {
opal_event_del(&btl_endpoint->endpoint_send_event);
}
break;
default:
BTL_ERROR(("invalid connection state (%d)", btl_endpoint->endpoint_state));
opal_event_del(&btl_endpoint->endpoint_send_event);
break;
}
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
}
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