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f6a5d58885
openmpi/orte/mca/oob/tcp/oob_tcp_peer.c
Brian Barrett f6a5d58885 Rather than set the connect event timeout number to something big and hoping 
its bigger than the timeout for the connect() call, just don't register
the handler by default and fall back to connect() timing out.  Should give
much happier performance on big clusters.

This commit was SVN r13639.
2007-02-13 18:36:50 +00:00

1045 строки
38 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) 2004-2006 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.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*
* In windows, many of the socket functions return an EWOULDBLOCK
* instead of \ things like EAGAIN, EINPROGRESS, etc. It has been
* verified that this will \ not conflict with other error codes that
* are returned by these functions \ under UNIX/Linux environments
*/
#include "orte_config.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#ifdef HAVE_SYS_UIO_H
#include <sys/uio.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include "opal/opal_socket_errno.h"
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
#endif
#include "orte/class/orte_proc_table.h"
#include "opal/util/output.h"
#include "orte/util/univ_info.h"
#include "orte/mca/gpr/gpr.h"
#include "orte/mca/ns/ns.h"
#include "orte/mca/errmgr/errmgr.h"
#include "oob_tcp.h"
#include "oob_tcp_peer.h"
static int mca_oob_tcp_peer_start_connect(mca_oob_tcp_peer_t* peer);
static int mca_oob_tcp_peer_event_init(mca_oob_tcp_peer_t* peer);
static void mca_oob_tcp_peer_connected(mca_oob_tcp_peer_t* peer);
static void mca_oob_tcp_peer_construct(mca_oob_tcp_peer_t* peer);
static void mca_oob_tcp_peer_destruct(mca_oob_tcp_peer_t* peer);
static int mca_oob_tcp_peer_send_connect_ack(mca_oob_tcp_peer_t* peer);
static int mca_oob_tcp_peer_recv_connect_ack(mca_oob_tcp_peer_t* peer);
static int mca_oob_tcp_peer_recv_blocking(mca_oob_tcp_peer_t* peer, void* data, size_t size);
static int mca_oob_tcp_peer_send_blocking(mca_oob_tcp_peer_t* peer, void* data, size_t size);
static void mca_oob_tcp_peer_recv_handler(int sd, short flags, void* user);
static void mca_oob_tcp_peer_send_handler(int sd, short flags, void* user);
static void mca_oob_tcp_peer_timer_handler(int sd, short flags, void* user);
static void mca_oob_tcp_peer_dump(mca_oob_tcp_peer_t* peer, const char* msg);
OBJ_CLASS_INSTANCE(
mca_oob_tcp_peer_t,
opal_free_list_item_t,
mca_oob_tcp_peer_construct,
mca_oob_tcp_peer_destruct);
/*
* This is the constructor function for the mca_oob_tcp_peer
* struct. Note that this function and OBJ_NEW should NEVER
* be called directly. Instead, use mca_oob_tcp_add_peer
*
* @param peer a pointer to the mca_oob_tcp_peer_t struct to be initialized
* @retval none
*/
static void mca_oob_tcp_peer_construct(mca_oob_tcp_peer_t* peer)
{
OBJ_CONSTRUCT(&(peer->peer_send_queue), opal_list_t);
OBJ_CONSTRUCT(&(peer->peer_lock), opal_mutex_t);
memset(&peer->peer_send_event, 0, sizeof(peer->peer_send_event));
memset(&peer->peer_recv_event, 0, sizeof(peer->peer_recv_event));
memset(&peer->peer_timer_event, 0, sizeof(peer->peer_timer_event));
opal_evtimer_set(&peer->peer_timer_event, mca_oob_tcp_peer_timer_handler, peer);
}
/*
* This is the destructor function for the mca_oob_tcp_peer
* struct. Note that this function and OBJ_RELEASE should NEVER
* be called directly. Instead, use mca_oob_tcp_del_peer
*
* @param peer a pointer to the mca_oob_tcp_peer_t struct to be destroyed
* @retval none
*/
static void mca_oob_tcp_peer_destruct(mca_oob_tcp_peer_t * peer)
{
mca_oob_tcp_peer_shutdown(peer);
OBJ_DESTRUCT(&(peer->peer_send_queue));
OBJ_DESTRUCT(&(peer->peer_lock));
}
/*
* Initialize events to be used by the peer instance for TCP select/poll callbacks.
*/
static int mca_oob_tcp_peer_event_init(mca_oob_tcp_peer_t* peer)
{
memset(&peer->peer_recv_event, 0, sizeof(peer->peer_recv_event));
memset(&peer->peer_send_event, 0, sizeof(peer->peer_send_event));
opal_event_set(
&peer->peer_recv_event,
peer->peer_sd,
OPAL_EV_READ|OPAL_EV_PERSIST,
mca_oob_tcp_peer_recv_handler,
peer);
opal_event_set(
&peer->peer_send_event,
peer->peer_sd,
OPAL_EV_WRITE|OPAL_EV_PERSIST,
mca_oob_tcp_peer_send_handler,
peer);
return ORTE_SUCCESS;
}
/*
* Initiate the appropriate action based on the state of the connection
* to the peer.
*
*/
int mca_oob_tcp_peer_send(mca_oob_tcp_peer_t* peer, mca_oob_tcp_msg_t* msg)
{
int rc = ORTE_SUCCESS;
OPAL_THREAD_LOCK(&peer->peer_lock);
switch(peer->peer_state) {
case MCA_OOB_TCP_CONNECTING:
case MCA_OOB_TCP_CONNECT_ACK:
case MCA_OOB_TCP_CLOSED:
case MCA_OOB_TCP_RESOLVE:
/*
* queue the message and attempt to resolve the peer address
*/
opal_list_append(&peer->peer_send_queue, (opal_list_item_t*)msg);
if(peer->peer_state == MCA_OOB_TCP_CLOSED) {
peer->peer_state = MCA_OOB_TCP_RESOLVE;
OPAL_THREAD_UNLOCK(&peer->peer_lock);
return mca_oob_tcp_resolve(peer);
}
break;
case MCA_OOB_TCP_FAILED:
rc = ORTE_ERR_UNREACH;
break;
case MCA_OOB_TCP_CONNECTED:
/*
* start the message and queue if not completed
*/
if (NULL != peer->peer_send_msg) {
opal_list_append(&peer->peer_send_queue, (opal_list_item_t*)msg);
} else {
/*if the send does not complete */
if(!mca_oob_tcp_msg_send_handler(msg, peer)) {
peer->peer_send_msg = msg;
opal_event_add(&peer->peer_send_event, 0);
} else {
mca_oob_tcp_msg_complete(msg, &peer->peer_name);
}
}
break;
}
OPAL_THREAD_UNLOCK(&peer->peer_lock);
return rc;
}
/*
* Lookup a peer by name, create one if it doesn't exist.
* @param name Peers globally unique identifier.
* @retval Pointer to the newly created struture or NULL on error.
*/
mca_oob_tcp_peer_t * mca_oob_tcp_peer_lookup(const orte_process_name_t* name)
{
int rc;
mca_oob_tcp_peer_t * peer, *old;
if (NULL == name) { /* can't look this one up */
return NULL;
}
OPAL_THREAD_LOCK(&mca_oob_tcp_component.tcp_lock);
peer = (mca_oob_tcp_peer_t*)orte_hash_table_get_proc(
&mca_oob_tcp_component.tcp_peers, name);
if(NULL != peer && memcmp(&peer->peer_name,name,sizeof(peer->peer_name)) == 0) {
OPAL_THREAD_UNLOCK(&mca_oob_tcp_component.tcp_lock);
return peer;
}
/* allocate from free list */
MCA_OOB_TCP_PEER_ALLOC(peer, rc);
if(NULL == peer) {
OPAL_THREAD_UNLOCK(&mca_oob_tcp_component.tcp_lock);
return NULL;
}
/* initialize peer state */
peer->peer_name = *name;
peer->peer_addr = NULL;
peer->peer_sd = -1;
peer->peer_state = MCA_OOB_TCP_CLOSED;
peer->peer_recv_msg = NULL;
peer->peer_send_msg = NULL;
peer->peer_retries = 0;
/* add to lookup table */
if(ORTE_SUCCESS != orte_hash_table_set_proc(&mca_oob_tcp_component.tcp_peers,
&peer->peer_name, peer)) {
MCA_OOB_TCP_PEER_RETURN(peer);
OPAL_THREAD_UNLOCK(&mca_oob_tcp_component.tcp_lock);
return NULL;
}
/* if the peer list is over the maximum size, remove one unsed peer */
opal_list_prepend(&mca_oob_tcp_component.tcp_peer_list, (opal_list_item_t *) peer);
if(mca_oob_tcp_component.tcp_peer_limit > 0 &&
(int)opal_list_get_size(&mca_oob_tcp_component.tcp_peer_list) >
mca_oob_tcp_component.tcp_peer_limit) {
old = (mca_oob_tcp_peer_t *)
opal_list_get_last(&mca_oob_tcp_component.tcp_peer_list);
while(1) {
if(0 == opal_list_get_size(&(old->peer_send_queue)) &&
NULL == peer->peer_recv_msg) {
opal_list_remove_item(&mca_oob_tcp_component.tcp_peer_list,
(opal_list_item_t *) old);
MCA_OOB_TCP_PEER_RETURN(old);
break;
} else {
old = (mca_oob_tcp_peer_t *) opal_list_get_prev(old);
if(opal_list_get_begin(&mca_oob_tcp_component.tcp_peer_list) == (opal_list_item_t*)old) {
/* we tried, but we couldn't find one that was valid to get rid
* of. Oh well. */
break;
}
}
}
}
OPAL_THREAD_UNLOCK(&mca_oob_tcp_component.tcp_lock);
return peer;
}
/*
* Try connecting to a peer using all the addresses that peer exported.
*/
static int mca_oob_tcp_peer_try_connect(mca_oob_tcp_peer_t* peer)
{
struct sockaddr_in inaddr;
int rc;
do {
/* pick an address in round-robin fashion from the list exported by the peer */
if((rc = mca_oob_tcp_addr_get_next(peer->peer_addr, &inaddr)) != ORTE_SUCCESS) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_try_connect: "
"mca_oob_tcp_addr_get_next failed with error=%d",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
rc);
mca_oob_tcp_peer_close(peer);
return ORTE_ERR_UNREACH;
}
if(mca_oob_tcp_component.tcp_debug > 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_try_connect: "
"connecting port %d to: %s:%d\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
ntohs(mca_oob_tcp_component.tcp_listen_port),
inet_ntoa(inaddr.sin_addr),
ntohs(inaddr.sin_port));
}
/* start the connect - will likely fail with EINPROGRESS */
if(connect(peer->peer_sd,
(struct sockaddr*)&inaddr, sizeof(struct sockaddr_in)) < 0) {
/* non-blocking so wait for completion */
if(opal_socket_errno == EINPROGRESS || opal_socket_errno == EWOULDBLOCK) {
if (mca_oob_tcp_component.tcp_timeout > 0) {
/* AWF - the connect_timeout MCA parameter
defaults to a low setting (10secs) to minimize
job startup time on IU BigRed. However, on
large machines such a short timeout may not be
suitable -- the head node may not be able to
accept connections fast enough. If this is the
case, increase the connect_timeout MCA
parameter.
*/
struct timeval tv;
tv.tv_sec = mca_oob_tcp_component.tcp_timeout;
tv.tv_usec = 0;
/* The first event is responsible for our timeout,
while the second event may occur sooner, due to
a successful connect() */
opal_evtimer_add(&peer->peer_timer_event, &tv);
}
opal_event_add(&peer->peer_send_event, 0);
return ORTE_SUCCESS;
}
if(mca_oob_tcp_component.tcp_debug > 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_try_connect: "
"connect to %s:%d failed: %s (%d)",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
inet_ntoa(inaddr.sin_addr),
ntohs(inaddr.sin_port),
strerror(opal_socket_errno),
opal_socket_errno);
}
continue;
}
/* send our globally unique process identifier to the peer */
if((rc = mca_oob_tcp_peer_send_connect_ack(peer)) == ORTE_SUCCESS) {
peer->peer_state = MCA_OOB_TCP_CONNECT_ACK;
opal_event_add(&peer->peer_recv_event, 0);
return ORTE_SUCCESS;
} else {
opal_output(0,
"[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_try_connect: "
"mca_oob_tcp_peer_send_connect_ack to %s:%d failed: %s (%d)",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
inet_ntoa(inaddr.sin_addr),
ntohs(inaddr.sin_port),
opal_strerror(rc),
rc);
}
} while(peer->peer_addr->addr_next != 0);
/* None of the interfaces worked.. */
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_try_connect: "
"connect to %s:%d failed, connecting over all interfaces failed!",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
inet_ntoa(inaddr.sin_addr),
ntohs(inaddr.sin_port));
mca_oob_tcp_peer_close(peer);
return ORTE_ERR_UNREACH;
}
/*
* Start a connection to the peer. 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 peer and wait for
* the peers response.
*/
static int mca_oob_tcp_peer_start_connect(mca_oob_tcp_peer_t* peer)
{
int flags;
/* create socket */
peer->peer_state = MCA_OOB_TCP_CONNECTING;
peer->peer_sd = socket(AF_INET, SOCK_STREAM, 0);
if (peer->peer_sd < 0) {
struct timeval tv = { 1,0 };
opal_output(0,
"[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_start_connect: socket() failed: %s (%d)\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
strerror(opal_socket_errno),
opal_socket_errno);
mca_oob_tcp_peer_shutdown(peer);
opal_evtimer_add(&peer->peer_timer_event, &tv);
return ORTE_ERR_UNREACH;
}
/* setup socket options */
mca_oob_tcp_set_socket_options(peer->peer_sd);
/* setup event callbacks */
mca_oob_tcp_peer_event_init(peer);
/* setup the socket as non-blocking */
if((flags = fcntl(peer->peer_sd, F_GETFL, 0)) < 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_connect: fcntl(F_GETFL) failed: %s (%d)\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
strerror(opal_socket_errno),
opal_socket_errno);
} else {
flags |= O_NONBLOCK;
if(fcntl(peer->peer_sd, F_SETFL, flags) < 0)
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_connect: fcntl(F_SETFL) failed: %s (%d)\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
strerror(opal_socket_errno),
opal_socket_errno);
}
if(mca_oob_tcp_component.tcp_debug > 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_start_connect: trying all %d addresses\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)), peer->peer_addr->addr_count );
}
/*
* We should parse all the IP addresses exported by the peer and try to connect to each of them.
*/
return mca_oob_tcp_peer_try_connect(peer);
}
/*
* Check the status of the connection. If the connection failed, will retry
* later. Otherwise, send this processes identifier to the peer on the
* newly connected socket.
*/
static void mca_oob_tcp_peer_complete_connect(mca_oob_tcp_peer_t* peer)
{
int so_error = 0;
opal_socklen_t so_length = sizeof(so_error);
/* unregister from receiving event notifications */
opal_event_del(&peer->peer_send_event);
opal_event_del(&peer->peer_timer_event);
/* check connect completion status */
if(getsockopt(peer->peer_sd, SOL_SOCKET, SO_ERROR, (char *)&so_error, &so_length) < 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_complete_connect: getsockopt() failed: %s (%d)\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
strerror(opal_socket_errno),
opal_socket_errno);
mca_oob_tcp_peer_close(peer);
return;
}
if(so_error == EINPROGRESS) {
opal_event_add(&peer->peer_send_event, 0);
return;
} else if (so_error == ECONNREFUSED || so_error == ETIMEDOUT) {
struct timeval tv = { 1,0 };
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_complete_connect: "
"connection failed (errno=%d) - retrying (pid=%d)\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
so_error, getpid());
mca_oob_tcp_peer_shutdown(peer);
opal_evtimer_add(&peer->peer_timer_event, &tv);
return;
} else if(so_error != 0) {
/* No need to worry about the return code here - we return regardless
at this point, and if an error did occur a message has already been
printed for the user */
mca_oob_tcp_peer_try_connect(peer);
return;
}
if(mca_oob_tcp_peer_send_connect_ack(peer) == ORTE_SUCCESS) {
peer->peer_state = MCA_OOB_TCP_CONNECT_ACK;
opal_event_add(&peer->peer_recv_event, 0);
} else {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_complete_connect: unable to send connect ack.",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)));
mca_oob_tcp_peer_close(peer);
}
}
/*
* Setup peer state to reflect that connection has been established,
* and start any pending sends.
*/
static void mca_oob_tcp_peer_connected(mca_oob_tcp_peer_t* peer)
{
opal_event_del(&peer->peer_timer_event);
peer->peer_state = MCA_OOB_TCP_CONNECTED;
peer->peer_retries = 0;
if(opal_list_get_size(&peer->peer_send_queue) > 0) {
if(NULL == peer->peer_send_msg)
peer->peer_send_msg = (mca_oob_tcp_msg_t*)
opal_list_remove_first(&peer->peer_send_queue);
opal_event_add(&peer->peer_send_event, 0);
}
}
/*
* Remove any event registrations associated with the socket
* and update the peer state to reflect the connection has
* been closed.
*/
void mca_oob_tcp_peer_close(mca_oob_tcp_peer_t* peer)
{
if(mca_oob_tcp_component.tcp_debug > 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_close(%p) sd %d state %d\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
(void*)peer,
peer->peer_sd,
peer->peer_state);
}
/* if we lose the connection to the seed - abort */
if(memcmp(&peer->peer_name,ORTE_PROC_MY_HNP,sizeof(orte_process_name_t)) == 0) {
/* If we are not already inside orte_finalize, then call abort */
if (ORTE_UNIVERSE_STATE_FINALIZE > orte_universe_info.state) {
/* Should free the peer lock before we abort so we don't
* get stuck in the orte_wait_kill when receiving messages in the
* tcp OOB. */
OPAL_THREAD_UNLOCK(&peer->peer_lock);
orte_errmgr.error_detected(1, "OOB: Connection to HNP lost", NULL);
}
}
mca_oob_tcp_peer_shutdown(peer);
}
void mca_oob_tcp_peer_shutdown(mca_oob_tcp_peer_t* peer)
{
/* giving up and cleanup any pending messages */
if(peer->peer_retries++ > mca_oob_tcp_component.tcp_peer_retries) {
mca_oob_tcp_msg_t *msg = peer->peer_send_msg;
while(msg != NULL) {
msg->msg_rc = ORTE_ERR_UNREACH;
mca_oob_tcp_msg_complete(msg, &peer->peer_name);
msg = (mca_oob_tcp_msg_t*)opal_list_remove_first(&peer->peer_send_queue);
}
peer->peer_send_msg = NULL;
}
if (peer->peer_sd >= 0) {
opal_event_del(&peer->peer_recv_event);
opal_event_del(&peer->peer_send_event);
CLOSE_THE_SOCKET(peer->peer_sd);
peer->peer_sd = -1;
}
opal_event_del(&peer->peer_timer_event);
peer->peer_state = MCA_OOB_TCP_CLOSED;
}
/*
* Send the globally unique identifier for this process to a peer on
* a newly connected socket.
*/
static int mca_oob_tcp_peer_send_connect_ack(mca_oob_tcp_peer_t* peer)
{
/* send process identifier of self and peer - note that we may
* have assigned the peer a unique process name - if it came up
* without one.
*/
mca_oob_tcp_hdr_t hdr;
memset(&hdr,0,sizeof(hdr));
if (NULL == orte_process_info.my_name) { /* my name isn't defined yet */
hdr.msg_src = *ORTE_NAME_INVALID;
} else {
hdr.msg_src = *(orte_process_info.my_name);
}
hdr.msg_dst = peer->peer_name;
hdr.msg_type = MCA_OOB_TCP_CONNECT;
MCA_OOB_TCP_HDR_HTON(&hdr);
if(mca_oob_tcp_peer_send_blocking(peer, &hdr, sizeof(hdr)) != sizeof(hdr)) {
return ORTE_ERR_UNREACH;
}
return ORTE_SUCCESS;
}
/*
* Receive the peers 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_oob_tcp_peer_recv_connect_ack(mca_oob_tcp_peer_t* peer)
{
mca_oob_tcp_hdr_t hdr;
if((mca_oob_tcp_peer_recv_blocking(peer, &hdr, sizeof(hdr))) != sizeof(hdr)) {
mca_oob_tcp_peer_close(peer);
return ORTE_ERR_UNREACH;
}
MCA_OOB_TCP_HDR_NTOH(&hdr);
if(hdr.msg_type != MCA_OOB_TCP_CONNECT) {
opal_output(0, "mca_oob_tcp_peer_recv_connect_ack: invalid header type: %d\n", hdr.msg_type);
mca_oob_tcp_peer_close(peer);
return ORTE_ERR_UNREACH;
}
/* compare the peers name to the expected value */
if(memcmp(&peer->peer_name, &hdr.msg_src, sizeof(orte_process_name_t)) != 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_recv_connect_ack: "
"received unexpected process identifier [%ld,%ld,%ld]\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
ORTE_NAME_ARGS(&(hdr.msg_src)));
mca_oob_tcp_peer_close(peer);
return ORTE_ERR_UNREACH;
}
/* if we have an invalid name or do not have one assigned at all - use the name returned by the peer.
* This needs to be a LITERAL comparison - we do NOT want wildcard values to return EQUAL
*/
if(orte_process_info.my_name == NULL) {
orte_ns.create_process_name(&orte_process_info.my_name,
hdr.msg_dst.cellid, hdr.msg_dst.jobid, hdr.msg_dst.vpid);
} else if (orte_ns.compare_fields(ORTE_NS_CMP_ALL, orte_process_info.my_name, ORTE_NAME_INVALID) == ORTE_EQUAL) {
*orte_process_info.my_name = hdr.msg_dst;
}
/* connected */
mca_oob_tcp_peer_connected(peer);
if(mca_oob_tcp_component.tcp_debug > 0) {
mca_oob_tcp_peer_dump(peer, "connected");
}
return ORTE_SUCCESS;
}
/*
* A blocking recv on a non-blocking socket. Used to receive the small amount of connection
* information that identifies the peers endpoint.
*/
static int mca_oob_tcp_peer_recv_blocking(mca_oob_tcp_peer_t* peer, void* data, size_t size)
{
unsigned char* ptr = (unsigned char*)data;
size_t cnt = 0;
while(cnt < size) {
int retval = recv(peer->peer_sd,(char *)ptr+cnt, size-cnt, 0);
/* remote closed connection */
if(retval == 0) {
if(mca_oob_tcp_component.tcp_debug > 0) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_recv_blocking: "
"peer closed connection: peer state %d",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
peer->peer_state);
}
mca_oob_tcp_peer_close(peer);
return -1;
}
/* socket is non-blocking so handle errors */
if(retval < 0) {
if(opal_socket_errno != EINTR && opal_socket_errno != EAGAIN && opal_socket_errno != EWOULDBLOCK) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_recv_blocking: recv() failed: %s (%d)\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
strerror(errno),
errno);
mca_oob_tcp_peer_close(peer);
return -1;
}
continue;
}
cnt += retval;
}
return cnt;
}
/*
* A blocking send on a non-blocking socket. Used to send the small amount of connection
* information that identifies the peers endpoint.
*/
static int mca_oob_tcp_peer_send_blocking(mca_oob_tcp_peer_t* peer, void* data, size_t size)
{
unsigned char* ptr = (unsigned char*)data;
size_t cnt = 0;
while(cnt < size) {
int retval = send(peer->peer_sd, (char *)ptr+cnt, size-cnt, 0);
if(retval < 0) {
if(opal_socket_errno != EINTR && opal_socket_errno != EAGAIN && opal_socket_errno != EWOULDBLOCK) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_send_blocking: send() failed: %s (%d)\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
strerror(opal_socket_errno),
opal_socket_errno);
mca_oob_tcp_peer_close(peer);
return -1;
}
continue;
}
cnt += retval;
}
return cnt;
}
int mca_oob_tcp_peer_send_ident(mca_oob_tcp_peer_t* peer)
{
mca_oob_tcp_hdr_t hdr;
if(peer->peer_state != MCA_OOB_TCP_CONNECTED)
return ORTE_SUCCESS;
hdr.msg_src = *orte_process_info.my_name;
hdr.msg_dst = peer->peer_name;
hdr.msg_type = MCA_OOB_TCP_IDENT;
hdr.msg_size = 0;
hdr.msg_tag = 0;
MCA_OOB_TCP_HDR_HTON(&hdr);
if(mca_oob_tcp_peer_send_blocking(peer, &hdr, sizeof(hdr)) != sizeof(hdr))
return ORTE_ERR_UNREACH;
return ORTE_SUCCESS;
}
/* static void mca_oob_tcp_peer_recv_ident(mca_oob_tcp_peer_t* peer, mca_oob_tcp_hdr_t* hdr) */
/* { */
/* OPAL_THREAD_LOCK(&mca_oob_tcp_component.tcp_lock); */
/* ompi_rb_tree_delete(&mca_oob_tcp_component.tcp_peer_tree, &peer->peer_name); */
/* peer->peer_name = hdr->msg_src; */
/* ompi_rb_tree_insert(&mca_oob_tcp_component.tcp_peer_tree, &peer->peer_name, peer); */
/* OPAL_THREAD_UNLOCK(&mca_oob_tcp_component.tcp_lock); */
/* } */
/*
* Dispatch to the appropriate action routine based on the state
* of the connection with the peer.
*/
static void mca_oob_tcp_peer_recv_handler(int sd, short flags, void* user)
{
mca_oob_tcp_peer_t* peer = (mca_oob_tcp_peer_t *)user;
OPAL_THREAD_LOCK(&peer->peer_lock);
switch(peer->peer_state) {
case MCA_OOB_TCP_CONNECT_ACK:
{
mca_oob_tcp_peer_recv_connect_ack(peer);
break;
}
case MCA_OOB_TCP_CONNECTED:
{
/* allocate a new message and setup for recv */
if(NULL == peer->peer_recv_msg) {
int rc;
mca_oob_tcp_msg_t* msg;
MCA_OOB_TCP_MSG_ALLOC(msg, rc);
if(NULL == msg) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_recv_handler: unable to allocate recv message\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)));
return;
}
msg->msg_type = MCA_OOB_TCP_UNEXPECTED;
msg->msg_rc = 0;
msg->msg_flags = 0;
msg->msg_peer = peer->peer_name;
msg->msg_rwiov = mca_oob_tcp_msg_iov_alloc(msg,2);
msg->msg_rwbuf = NULL;
msg->msg_rwcnt = msg->msg_rwnum = 1;
msg->msg_rwptr = msg->msg_rwiov;
msg->msg_rwiov[0].iov_base = (ompi_iov_base_ptr_t)&msg->msg_hdr;
msg->msg_rwiov[0].iov_len = sizeof(msg->msg_hdr);
peer->peer_recv_msg = msg;
}
if (peer->peer_recv_msg &&
mca_oob_tcp_msg_recv_handler(peer->peer_recv_msg, peer)) {
mca_oob_tcp_msg_t* msg = peer->peer_recv_msg;
peer->peer_recv_msg = NULL;
OPAL_THREAD_UNLOCK(&peer->peer_lock);
mca_oob_tcp_msg_recv_complete(msg, peer);
return;
}
break;
}
default:
{
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_recv_handler: invalid socket state(%d)",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
peer->peer_state);
mca_oob_tcp_peer_close(peer);
break;
}
}
OPAL_THREAD_UNLOCK(&peer->peer_lock);
}
/*
* A file descriptor is available/ready for send. Check the state
* of the socket and take the appropriate action.
*/
static void mca_oob_tcp_peer_send_handler(int sd, short flags, void* user)
{
mca_oob_tcp_peer_t* peer = (mca_oob_tcp_peer_t *)user;
OPAL_THREAD_LOCK(&peer->peer_lock);
switch(peer->peer_state) {
case MCA_OOB_TCP_CONNECTING:
mca_oob_tcp_peer_complete_connect(peer);
break;
case MCA_OOB_TCP_CONNECTED:
{
while(peer->peer_send_msg != NULL) {
/* complete the current send */
mca_oob_tcp_msg_t* msg = peer->peer_send_msg;
if(mca_oob_tcp_msg_send_handler(msg, peer)) {
mca_oob_tcp_msg_complete(msg, &peer->peer_name);
} else {
break;
}
/* if current completed - progress any pending sends */
peer->peer_send_msg = (mca_oob_tcp_msg_t*)
opal_list_remove_first(&peer->peer_send_queue);
}
/* if nothing else to do unregister for send event notifications */
if(NULL == peer->peer_send_msg) {
opal_event_del(&peer->peer_send_event);
}
break;
}
default:
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_send_handler: invalid connection state (%d)",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
peer->peer_state);
opal_event_del(&peer->peer_send_event);
break;
}
OPAL_THREAD_UNLOCK(&peer->peer_lock);
}
/*
* Routine for debugging to print the connection state and socket options
*/
static void mca_oob_tcp_peer_dump(mca_oob_tcp_peer_t* peer, const char* msg)
{
char src[64];
char dst[64];
char buff[255];
int sndbuf,rcvbuf,nodelay,flags;
struct sockaddr_in inaddr;
opal_socklen_t optlen;
opal_socklen_t addrlen = sizeof(struct sockaddr_in);
getsockname(peer->peer_sd, (struct sockaddr*)&inaddr, &addrlen);
sprintf(src, "%s", inet_ntoa(inaddr.sin_addr));
getpeername(peer->peer_sd, (struct sockaddr*)&inaddr, &addrlen);
sprintf(dst, "%s", inet_ntoa(inaddr.sin_addr));
if((flags = fcntl(peer->peer_sd, F_GETFL, 0)) < 0) {
opal_output(0, "mca_oob_tcp_peer_dump: fcntl(F_GETFL) failed: %s (%d)\n",
strerror(opal_socket_errno),
opal_socket_errno);
}
#if defined(SO_SNDBUF)
optlen = sizeof(sndbuf);
if(getsockopt(peer->peer_sd, SOL_SOCKET, SO_SNDBUF, (char *)&sndbuf, &optlen) < 0) {
opal_output(0, "mca_oob_tcp_peer_dump: SO_SNDBUF option: %s (%d)\n",
strerror(opal_socket_errno),
opal_socket_errno);
}
#else
sndbuf = -1;
#endif
#if defined(SO_RCVBUF)
optlen = sizeof(rcvbuf);
if(getsockopt(peer->peer_sd, SOL_SOCKET, SO_RCVBUF, (char *)&rcvbuf, &optlen) < 0) {
opal_output(0, "mca_oob_tcp_peer_dump: SO_RCVBUF option: %s (%d)\n",
strerror(opal_socket_errno),
opal_socket_errno);
}
#else
rcvbuf = -1;
#endif
#if defined(TCP_NODELAY)
optlen = sizeof(nodelay);
if(getsockopt(peer->peer_sd, IPPROTO_TCP, TCP_NODELAY, (char *)&nodelay, &optlen) < 0) {
opal_output(0, "mca_oob_tcp_peer_dump: TCP_NODELAY option: %s (%d)\n",
strerror(opal_socket_errno),
opal_socket_errno);
}
#else
nodelay = 0;
#endif
sprintf(buff, "[%lu,%lu,%lu]-[%lu,%lu,%lu] %s: %s - %s nodelay %d sndbuf %d rcvbuf %d flags %08x\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)),
msg, src, dst, nodelay, sndbuf, rcvbuf, flags);
opal_output(0, buff);
}
/*
* Accept incoming connection - if not already connected. We compare the name of the
* peer to our own name using the ns.compare_fields function as we want this to be
* a LITERAL comparison - i.e., there is no occasion when the peer's name should
* be a wildcard value.
*
* To avoid competing reciprocal connection attempts, we only accept connections from
* processes whose names are "greater" than our own.
*/
bool mca_oob_tcp_peer_accept(mca_oob_tcp_peer_t* peer, int sd)
{
int cmpval;
OPAL_THREAD_LOCK(&peer->peer_lock);
cmpval = orte_ns.compare_fields(ORTE_NS_CMP_ALL, &peer->peer_name, orte_process_info.my_name);
if ((peer->peer_state == MCA_OOB_TCP_CLOSED) ||
(peer->peer_state == MCA_OOB_TCP_RESOLVE) ||
(peer->peer_state != MCA_OOB_TCP_CONNECTED &&
cmpval == ORTE_VALUE1_GREATER)) {
if(peer->peer_state != MCA_OOB_TCP_CLOSED) {
mca_oob_tcp_peer_close(peer);
}
peer->peer_sd = sd;
mca_oob_tcp_peer_event_init(peer);
if(mca_oob_tcp_peer_send_connect_ack(peer) != ORTE_SUCCESS) {
opal_output(0, "[%lu,%lu,%lu]-[%lu,%lu,%lu] mca_oob_tcp_peer_accept: "
"mca_oob_tcp_peer_send_connect_ack failed\n",
ORTE_NAME_ARGS(orte_process_info.my_name),
ORTE_NAME_ARGS(&(peer->peer_name)));
mca_oob_tcp_peer_close(peer);
OPAL_THREAD_UNLOCK(&peer->peer_lock);
return false;
}
mca_oob_tcp_peer_connected(peer);
opal_event_add(&peer->peer_recv_event, 0);
if(mca_oob_tcp_component.tcp_debug > 0) {
mca_oob_tcp_peer_dump(peer, "accepted");
}
OPAL_THREAD_UNLOCK(&peer->peer_lock);
return true;
}
OPAL_THREAD_UNLOCK(&peer->peer_lock);
return false;
}
/*
* resolve process name to an actual internet address.
*/
void mca_oob_tcp_peer_resolved(mca_oob_tcp_peer_t* peer, mca_oob_tcp_addr_t* addr)
{
OPAL_THREAD_LOCK(&peer->peer_lock);
peer->peer_addr = addr;
if((peer->peer_state == MCA_OOB_TCP_RESOLVE) ||
(peer->peer_state == MCA_OOB_TCP_CLOSED && opal_list_get_size(&peer->peer_send_queue))) {
mca_oob_tcp_peer_start_connect(peer);
}
OPAL_THREAD_UNLOCK(&peer->peer_lock);
}
/*
* Callback on timeout - retry connection attempt.
*/
static void mca_oob_tcp_peer_timer_handler(int sd, short flags, void* user)
{
/* start the connection to the peer */
mca_oob_tcp_peer_t* peer = (mca_oob_tcp_peer_t*)user;
OPAL_THREAD_LOCK(&peer->peer_lock);
if(peer->peer_state == MCA_OOB_TCP_CLOSED)
mca_oob_tcp_peer_start_connect(peer);
else if(peer->peer_state == MCA_OOB_TCP_CONNECTING)
mca_oob_tcp_peer_complete_connect(peer);
OPAL_THREAD_UNLOCK(&peer->peer_lock);
}
/*
* Remove any references to the indicated message.
*/
void mca_oob_tcp_peer_dequeue_msg(mca_oob_tcp_peer_t* peer, mca_oob_tcp_msg_t* msg)
{
opal_list_item_t* item;
OPAL_THREAD_LOCK(&peer->peer_lock);
if (peer->peer_send_msg == msg)
peer->peer_send_msg = NULL;
if (peer->peer_recv_msg == msg)
peer->peer_recv_msg = NULL;
for( item = opal_list_get_first(&peer->peer_send_queue);
item != opal_list_get_end(&peer->peer_send_queue);
item = opal_list_get_next(item)) {
if(item == (opal_list_item_t*)msg) {
opal_list_remove_item(&peer->peer_send_queue, item);
break;
}
}
OPAL_THREAD_UNLOCK(&peer->peer_lock);
}
/**
* Set socket buffering
*/
void mca_oob_tcp_set_socket_options(int sd)
{
int optval;
#if defined(TCP_NODELAY)
optval = 1;
if(setsockopt(sd, IPPROTO_TCP, TCP_NODELAY, (char *)&optval, sizeof(optval)) < 0) {
opal_output(0, "[%s:%d] setsockopt(TCP_NODELAY) failed: %s (%d)",
__FILE__, __LINE__,
strerror(opal_socket_errno),
opal_socket_errno);
}
#endif
#if defined(SO_SNDBUF)
if(mca_oob_tcp_component.tcp_sndbuf > 0 &&
setsockopt(sd, SOL_SOCKET, SO_SNDBUF, (char *)&mca_oob_tcp_component.tcp_sndbuf, sizeof(int)) < 0) {
opal_output(0, "[%s:%d] setsockopt(SO_SNDBUF) failed: %s (%d)",
__FILE__, __LINE__,
strerror(opal_socket_errno),
opal_socket_errno);
}
#endif
#if defined(SO_RCVBUF)
if(mca_oob_tcp_component.tcp_rcvbuf > 0 &&
setsockopt(sd, SOL_SOCKET, SO_RCVBUF, (char *)&mca_oob_tcp_component.tcp_rcvbuf, sizeof(int)) < 0) {
opal_output(0, "[%s:%d] setsockopt(SO_RCVBUF) failed: %s (%d)",
__FILE__, __LINE__,
strerror(opal_socket_errno),
opal_socket_errno);
}
#endif
}
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