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openmpi/ompi/mca/btl/sctp/btl_sctp_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

1321 строка
53 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) 2009 Sun Microsystems, Inc 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 "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 <netinet/sctp.h>
#include "ompi/types.h"
#include "ompi/mca/btl/base/btl_base_error.h"
#include "opal/mca/event/event.h"
#include "btl_sctp.h"
#include "btl_sctp_endpoint.h"
#include "btl_sctp_proc.h"
#include "btl_sctp_frag.h"
#include "btl_sctp_addr.h"
#include "btl_sctp_utils.h"
#include "btl_sctp_recv_handler.h"
/* Pre-allocate pool of endpoints. These are copies of endpoints
* since opal_list only allows an item to be a member of one list
* at a time. We have a freelist of pre-allocated endpoints and
* also a list of endpoints that currently want to send. Our send
* handler walks this list each time it's invoked. If nobody currently
* wants to send (i.e., endpoint_associated_with_send is NULL), the
* POLLOUT for this socket is turned off. If there are no more free
* slots allocated, the pool expands.
*/
#define INITIAL_NUM_FREE_POOL_SLOTS 10
static opal_list_t sending_endpoints;
static opal_list_t sending_endpoints_freelist;
mca_btl_base_endpoint_t *endpoint_associated_with_send;
OBJ_CLASS_INSTANCE(
our_sctp_endpoint,
opal_list_item_t,
NULL,
NULL);
static int have_initiated_sending_endpoints_list=0;
struct sending_endpoint_chunk {
our_sctp_endpoint *to_free;
struct sending_endpoint_chunk *next;
};
typedef struct sending_endpoint_chunk sending_endpoint_chunk;
static sending_endpoint_chunk endpoint_chunks_to_free;
static sending_endpoint_chunk * endpoint_chunks_to_free_tail;
static int sending_endpoints_walk_count;
/*
* Initialize state of the endpoint instance.
*
*/
static void mca_btl_sctp_endpoint_construct(mca_btl_sctp_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_SCTP_CLOSED;
endpoint->endpoint_retries = 0;
endpoint->endpoint_nbo = false;
#if MCA_BTL_SCTP_ENDPOINT_CACHE
endpoint->endpoint_cache = NULL;
endpoint->endpoint_cache_pos = NULL;
endpoint->endpoint_cache_length = 0;
#endif /* MCA_BTL_SCTP_ENDPOINT_CACHE */
endpoint->endpoint_has_initialized = 0;
endpoint->endpoint_in_list = 0;
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);
if(0 == have_initiated_sending_endpoints_list) {
int i;
our_sctp_endpoint *free_entries;
have_initiated_sending_endpoints_list++;
OBJ_CONSTRUCT(&sending_endpoints, opal_list_t);
OBJ_CONSTRUCT(&sending_endpoints_freelist, opal_list_t);
endpoint_associated_with_send = NULL;
if(NULL == (free_entries = (our_sctp_endpoint *) malloc(sizeof(our_sctp_endpoint)
* INITIAL_NUM_FREE_POOL_SLOTS)))
{
BTL_ERROR(("cannot allocate free poll entries."));
return;
}
memset(free_entries, 0, sizeof(our_sctp_endpoint) * INITIAL_NUM_FREE_POOL_SLOTS);
for(i=0; i < INITIAL_NUM_FREE_POOL_SLOTS; i++) {
opal_list_append(&sending_endpoints_freelist, (opal_list_item_t *) &free_entries[i]);
}
endpoint_chunks_to_free.to_free = free_entries;
endpoint_chunks_to_free.next = NULL;
endpoint_chunks_to_free_tail = &endpoint_chunks_to_free;
}
}
/*
* Destroy a endpoint
*
*/
static void mca_btl_sctp_endpoint_destruct(mca_btl_sctp_endpoint_t* endpoint)
{
mca_btl_sctp_proc_remove(endpoint->endpoint_proc, endpoint);
mca_btl_sctp_endpoint_close(endpoint);
OBJ_DESTRUCT(&endpoint->endpoint_frags);
OBJ_DESTRUCT(&endpoint->endpoint_send_lock);
OBJ_DESTRUCT(&endpoint->endpoint_recv_lock);
if(have_initiated_sending_endpoints_list) {
sending_endpoint_chunk *chunkp = &endpoint_chunks_to_free, *nextp;
have_initiated_sending_endpoints_list--;
OBJ_DESTRUCT(&sending_endpoints);
OBJ_DESTRUCT(&sending_endpoints_freelist);
/* free up memory used in pool of sending_endpoint items */
/* only to_free malloc'd in static endpoint_chunks_to_free */
free(endpoint_chunks_to_free.to_free);
nextp = chunkp->next;
while(nextp) /* ...but all other chunks were dynamically allocated */
{
chunkp = nextp;
nextp = chunkp->next;
free(chunkp->to_free);
free(chunkp);
}
}
}
OBJ_CLASS_INSTANCE(
mca_btl_sctp_endpoint_t,
opal_list_item_t,
mca_btl_sctp_endpoint_construct,
mca_btl_sctp_endpoint_destruct);
static void mca_btl_sctp_endpoint_construct(mca_btl_base_endpoint_t* btl_endpoint);
static void mca_btl_sctp_endpoint_destruct(mca_btl_base_endpoint_t* btl_endpoint);
static int mca_btl_sctp_endpoint_start_connect(mca_btl_base_endpoint_t*);
static void mca_btl_sctp_endpoint_connected(mca_btl_base_endpoint_t*);
static void mca_btl_sctp_endpoint_recv_handler(int sd, short flags, void* user);
static void mca_btl_sctp_endpoint_send_handler(int sd, short flags, void* user);
/*
* Diagnostics: change this to "1" to enable the function
* mca_btl_sctp_endpoint_dump(), below
*/
#define WANT_PEER_DUMP 0
/*
* diagnostics
*/
#if WANT_PEER_DUMP
static void mca_btl_sctp_endpoint_dump(mca_btl_base_endpoint_t* btl_endpoint, const char* msg)
{
char src[64];
char dst[64];
int sndbuf,rcvbuf,nodelay,flags;
struct sockaddr_in inaddr;
opal_socklen_t obtlen;
opal_socklen_t addrlen = sizeof(struct sockaddr_in);
getsockname(btl_endpoint->endpoint_sd, (struct sockaddr*)&inaddr, &addrlen);
sprintf(src, "%s", inet_ntoa(inaddr.sin_addr));
getpeername(btl_endpoint->endpoint_sd, (struct sockaddr*)&inaddr, &addrlen);
sprintf(dst, "%s", inet_ntoa(inaddr.sin_addr));
if((flags = fcntl(btl_endpoint->endpoint_sd, F_GETFL, 0)) < 0) {
BTL_ERROR(("fcntl(F_GETFL) failed with errno=%d", 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: errno %d", 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: errno %d", opal_socket_errno));
}
#else
rcvbuf = -1;
#endif
#if defined(SCTP_NODELAY)
obtlen = sizeof(nodelay);
if(getsockopt(btl_endpoint->endpoint_sd, IPPROTO_SCTP, SCTP_NODELAY, (char *)&nodelay, &obtlen) < 0) {
BTL_ERROR(("SCTP_NODELAY option: errno %d", opal_socket_errno));
}
#else
nodelay = 0;
#endif
BTL_DEBUG(("%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_sctp_endpoint_event_init(mca_btl_base_endpoint_t* btl_endpoint, int sd)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1*/
#if MCA_BTL_SCTP_ENDPOINT_CACHE
btl_endpoint->endpoint_cache = (char*)malloc(mca_btl_sctp_component.sctp_endpoint_cache);
btl_endpoint->endpoint_cache_pos = btl_endpoint->endpoint_cache;
#endif /* MCA_BTL_SCTP_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_sctp_endpoint_recv_handler,
btl_endpoint );
opal_event_set(opal_event_base, &btl_endpoint->endpoint_send_event,
btl_endpoint->endpoint_sd,
OPAL_EV_WRITE|OPAL_EV_PERSIST,
mca_btl_sctp_endpoint_send_handler,
btl_endpoint);
}
else {
/* 1 to many */
if(0 == btl_endpoint->endpoint_has_initialized) {
btl_endpoint->endpoint_has_initialized++;
btl_endpoint->endpoint_sd = mca_btl_sctp_component.sctp_listen_sd;
#if MCA_BTL_SCTP_ENDPOINT_CACHE
btl_endpoint->endpoint_cache = (char*)malloc(mca_btl_sctp_component.sctp_endpoint_cache);
btl_endpoint->endpoint_cache_pos = btl_endpoint->endpoint_cache;
#endif /* MCA_BTL_SCTP_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_sctp_recv_handler,
btl_endpoint );
opal_event_set(opal_event_base, &btl_endpoint->endpoint_send_event,
btl_endpoint->endpoint_sd,
OPAL_EV_WRITE|OPAL_EV_PERSIST,
mca_btl_sctp_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.
*
* Here we have our first notion of endpoint connection state. Instead of
* assigning state, it may be benficial to maintain another table of recvrs that
* we have sent to in the past. If that recvr is NOT found in the table, then it
* is a new proc and we have to send them our GUID before we send anything else.
*/
int mca_btl_sctp_endpoint_send(mca_btl_base_endpoint_t* btl_endpoint, mca_btl_sctp_frag_t* frag)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1 */
int rc = OMPI_SUCCESS;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
switch(btl_endpoint->endpoint_state) {
case MCA_BTL_SCTP_CONNECTING:
case MCA_BTL_SCTP_CONNECT_ACK:
case MCA_BTL_SCTP_CLOSED:
opal_list_append(&btl_endpoint->endpoint_frags, (opal_list_item_t*)frag);
if(btl_endpoint->endpoint_state == MCA_BTL_SCTP_CLOSED) {
rc = mca_btl_sctp_endpoint_start_connect(btl_endpoint);
}
break;
case MCA_BTL_SCTP_FAILED:
rc = OMPI_ERR_UNREACH;
break;
case MCA_BTL_SCTP_CONNECTED:
if (btl_endpoint->endpoint_send_frag == NULL) {
if(frag->base.des_flags & MCA_BTL_DES_FLAGS_PRIORITY &&
mca_btl_sctp_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);
frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc);
if( btl_ownership ) {
MCA_BTL_SCTP_FRAG_RETURN(frag);
}
return OMPI_SUCCESS;
} else {
btl_endpoint->endpoint_send_frag = frag;
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
}
} else {
opal_list_append(&btl_endpoint->endpoint_frags, (opal_list_item_t*)frag);
}
break;
case MCA_BTL_SCTP_SHUTDOWN:
rc = OMPI_ERROR;
break;
}
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
return rc;
}
else {
/* 1 to many */
int rc = OMPI_SUCCESS;
/* What if there are multiple procs on this endpoint? Possible? */
ompi_vpid_t vpid = btl_endpoint->endpoint_proc->proc_ompi->proc_name.vpid;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
if((mca_btl_sctp_proc_check_vpid(vpid, sender_proc_table)) == INVALID_ENTRY) {
opal_list_append(&btl_endpoint->endpoint_frags, (opal_list_item_t*)frag);
rc = mca_btl_sctp_endpoint_start_connect(btl_endpoint);
/* add the proc to sender_proc_table somewhere here */
mca_btl_sctp_proc_add_vpid(vpid, btl_endpoint->endpoint_proc, sender_proc_table);
}
else { /* VALID_ENTRY */
if (btl_endpoint->endpoint_send_frag == NULL) {
if(frag->base.des_flags & MCA_BTL_DES_FLAGS_PRIORITY &&
mca_btl_sctp_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);
frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc);
if( btl_ownership ) {
MCA_BTL_SCTP_FRAG_RETURN(frag);
}
return OMPI_SUCCESS;
} else {
btl_endpoint->endpoint_send_frag = frag;
/* TODO make this all a function since repeated below */
/* if this endpoint is already in the sending_endpoints list; don't add duplicate */
/* if the associated endpoint is this one, avoid putting into the list */
if(btl_endpoint->endpoint_in_list ||
btl_endpoint == endpoint_associated_with_send) { /* pointer comparison assumes no dup endpoints */
; /* leave */
}
else if(NULL != endpoint_associated_with_send) {
/* another endpoint associated with sending on this one-to-many socket */
/* put this endpoint in the list of endpoints that need to send no matter what... */
our_sctp_endpoint *our_btl_endpoint;
if(0 == opal_list_get_size(&sending_endpoints_freelist))
{
/* need to expand the freelist */
our_sctp_endpoint *free_entries;
int i;
if(NULL == (endpoint_chunks_to_free_tail->next = (sending_endpoint_chunk *)
malloc(sizeof(sending_endpoint_chunk))))
{
BTL_ERROR(("cannot allocate sending endpoint chunk."));
return OMPI_ERR_OUT_OF_RESOURCE;
}
if(NULL == (free_entries = (our_sctp_endpoint *) malloc(sizeof(our_sctp_endpoint)
* INITIAL_NUM_FREE_POOL_SLOTS)))
{
BTL_ERROR(("cannot allocate free poll entries."));
/* only 1 of 2 newly required allocations were successful so free the other
* and reset the value so the generic destruction function works.
*/
free(endpoint_chunks_to_free_tail->next);
endpoint_chunks_to_free_tail->next = NULL;
return OMPI_ERR_OUT_OF_RESOURCE;
}
memset(free_entries, 0, sizeof(our_sctp_endpoint) * INITIAL_NUM_FREE_POOL_SLOTS);
for(i=0; i < INITIAL_NUM_FREE_POOL_SLOTS; i++) {
opal_list_append(&sending_endpoints_freelist,
(opal_list_item_t *) &free_entries[i]);
}
/* update location of where we'll expand next (if need be) */
endpoint_chunks_to_free_tail = endpoint_chunks_to_free_tail->next;
endpoint_chunks_to_free_tail->next = NULL;
endpoint_chunks_to_free_tail->to_free = free_entries;
}
our_btl_endpoint = (our_sctp_endpoint *) opal_list_remove_first(&sending_endpoints_freelist);
memset(our_btl_endpoint, 0, sizeof(our_sctp_endpoint));
our_btl_endpoint->endpoint = btl_endpoint;
opal_list_append(&sending_endpoints, (opal_list_item_t *) our_btl_endpoint);
btl_endpoint->endpoint_in_list++;
} else {
/* no endpoint is currently associated with sending on this socket */
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
endpoint_associated_with_send = btl_endpoint;
}
}
} else {
/* this btl has pending frags to send to queue this new one */
opal_list_append(&btl_endpoint->endpoint_frags, (opal_list_item_t*)frag);
}
}
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_sctp_endpoint_send_blocking(mca_btl_base_endpoint_t* btl_endpoint, void* data, size_t size)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1 */
unsigned char* ptr = (unsigned char*)data;
size_t cnt = 0;
while(cnt < size) {
/* We don't need to pass the sockaddr and len in
* sctp_sendmsg() as it's a TCP style 1 to 1 socket.
*/
int retval = sctp_sendmsg(btl_endpoint->endpoint_sd, (char *)ptr+cnt, size-cnt,
0, 0, 0, 0, 0, 0, 0);
if (retval >= 0) {
SCTP_BTL_ERROR((" mca_btl_sctp_endpoint_send_blocking() sd=%d, retval=%d\n",
btl_endpoint->endpoint_sd, retval));
}
if(retval < 0) {
if(opal_socket_errno != EINTR && opal_socket_errno != EAGAIN &&
opal_socket_errno != EWOULDBLOCK) {
BTL_ERROR(("send() failed with errno=%d",opal_socket_errno));
mca_btl_sctp_endpoint_close(btl_endpoint);
return -1;
}
continue;
}
cnt += retval;
}
return cnt;
}
else {
/* 1 to many */
unsigned char* ptr = (unsigned char*)data;
size_t cnt = 0;
struct sockaddr_in btl_sockaddr;
btl_sockaddr = mca_btl_sctp_utils_sockaddr_from_endpoint(btl_endpoint);
while(cnt < size) {
socklen_t len = sizeof(struct sockaddr_in);
int retval = sctp_sendmsg(btl_endpoint->endpoint_sd, (char *)ptr+cnt, size-cnt,
(struct sockaddr *)&btl_sockaddr, len, 0, 0, 0, 0, 0);
if (retval >= 0) {
SCTP_BTL_ERROR((" mca_btl_sctp_endpoint_send_blocking() retval=%d\n", retval));
}
if(retval < 0) {
if(opal_socket_errno != EINTR && opal_socket_errno != EAGAIN && opal_socket_errno != EWOULDBLOCK) {
BTL_ERROR(("send() failed with errno=%d",opal_socket_errno));
mca_btl_sctp_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_sctp_endpoint_send_connect_ack(mca_btl_base_endpoint_t* btl_endpoint)
{
/* send process identifier to remote endpoint */
mca_btl_sctp_proc_t* btl_proc = mca_btl_sctp_proc_local();
ompi_process_name_t guid = btl_proc->proc_ompi->proc_name;
ORTE_PROCESS_NAME_HTON(guid);
if(mca_btl_sctp_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_sctp_endpoint_accept(mca_btl_base_endpoint_t* btl_endpoint, struct sockaddr_in* addr, int sd)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1 */
mca_btl_sctp_addr_t* btl_addr;
mca_btl_sctp_proc_t* this_proc = mca_btl_sctp_proc_local();
int cmpval;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_recv_lock);
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
if(((btl_addr = btl_endpoint->endpoint_addr) != NULL) &&
btl_addr->addr_inet.s_addr == addr->sin_addr.s_addr)
{
mca_btl_sctp_proc_t *endpoint_proc = btl_endpoint->endpoint_proc;
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_SCTP_CONNECTED &&
cmpval < 0)) {
mca_btl_sctp_endpoint_close(btl_endpoint);
SCTP_BTL_ERROR(("endpoint_close in endpoint_accept #1\n"));
btl_endpoint->endpoint_sd = sd;
if(mca_btl_sctp_endpoint_send_connect_ack(btl_endpoint) != OMPI_SUCCESS) {
mca_btl_sctp_endpoint_close(btl_endpoint);
SCTP_BTL_ERROR(("endpoint_close in endpoint_accept #2\n"));
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return false;
}
mca_btl_sctp_endpoint_event_init(btl_endpoint, sd);
opal_event_add(&btl_endpoint->endpoint_recv_event, 0);
mca_btl_sctp_endpoint_connected(btl_endpoint);
#if OPAL_ENABLE_DEBUG && WANT_PEER_DUMP
mca_btl_sctp_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;
}
else {
/* 1 to many */
mca_btl_sctp_addr_t* btl_addr;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_recv_lock);
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
if((btl_addr = btl_endpoint->endpoint_addr) != NULL) {
/* conflicts can't happen with one-to-many socket */
mca_btl_sctp_endpoint_event_init(btl_endpoint, sd);
opal_event_add(&btl_endpoint->endpoint_recv_event, 0);
#if OPAL_ENABLE_DEBUG && WANT_PEER_DUMP
mca_btl_sctp_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_sctp_endpoint_close(mca_btl_base_endpoint_t* btl_endpoint)
{
SCTP_BTL_ERROR(("inside endpoint_close (sd = %d)\n", btl_endpoint->endpoint_sd));
if(btl_endpoint->endpoint_sd >= 0) {
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_SCTP_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_SCTP_ENDPOINT_CACHE */
}
btl_endpoint->endpoint_state = MCA_BTL_SCTP_CLOSED;
btl_endpoint->endpoint_retries++;
}
void mca_btl_sctp_endpoint_shutdown(mca_btl_base_endpoint_t* btl_endpoint)
{
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_recv_lock);
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
mca_btl_sctp_endpoint_close(btl_endpoint);
btl_endpoint->endpoint_state = MCA_BTL_SCTP_SHUTDOWN;
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
}
/*
* Setup endpoint state to reflect that connection has been established,
* and start any pending sends.
*/
static void mca_btl_sctp_endpoint_connected(mca_btl_base_endpoint_t* btl_endpoint)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1 */
btl_endpoint->endpoint_state = MCA_BTL_SCTP_CONNECTED;
btl_endpoint->endpoint_retries = 0;
if(opal_list_get_size(&btl_endpoint->endpoint_frags) > 0) {
if(NULL == btl_endpoint->endpoint_send_frag) {
btl_endpoint->endpoint_send_frag = (mca_btl_sctp_frag_t*)
opal_list_remove_first(&btl_endpoint->endpoint_frags);
}
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
}
}
else {
/* 1 to many */
btl_endpoint->endpoint_state = MCA_BTL_SCTP_CONNECTED;
btl_endpoint->endpoint_retries = 0;
if(opal_list_get_size(&btl_endpoint->endpoint_frags) > 0) {
if(NULL == btl_endpoint->endpoint_send_frag) {
btl_endpoint->endpoint_send_frag = (mca_btl_sctp_frag_t*)
opal_list_remove_first(&btl_endpoint->endpoint_frags);
}
/* TOOD make this all a function since repeated below */
/* if this endpoint is already in the sending_endpoints list; don't add duplicate */
/* if the associated endpoint is this one, avoid putting into the list */
if(btl_endpoint->endpoint_in_list ||
btl_endpoint == endpoint_associated_with_send) { /* pointer comparison assumes no dup endpoints */
; /* leave */
}
else if(NULL != endpoint_associated_with_send) {
/* another endpoint associated with sending on this one-to-many socket */
/* put this endpoint in the list of endpoints that need to send no matter what... */
our_sctp_endpoint *our_btl_endpoint;
if(0 == opal_list_get_size(&sending_endpoints_freelist))
{
/* need to expand the freelist */
our_sctp_endpoint *free_entries;
int i;
if(NULL == (endpoint_chunks_to_free_tail->next = (sending_endpoint_chunk *)
malloc(sizeof(sending_endpoint_chunk))))
{
BTL_ERROR(("cannot allocate sending endpoint chunk."));
return;
}
if(NULL == (free_entries = (our_sctp_endpoint *) malloc(sizeof(our_sctp_endpoint)
* INITIAL_NUM_FREE_POOL_SLOTS)))
{
BTL_ERROR(("cannot allocate free poll entries."));
/* only 1 of 2 newly required allocations were successful so free the other
* and reset the value so the generic destruction function works.
*/
free(endpoint_chunks_to_free_tail->next);
endpoint_chunks_to_free_tail->next = NULL;
return;
}
for(i=0; i < INITIAL_NUM_FREE_POOL_SLOTS; i++) {
opal_list_append(&sending_endpoints_freelist,
(opal_list_item_t *) &free_entries[i]);
}
/* update location of where we'll expand next (if need be) */
endpoint_chunks_to_free_tail = endpoint_chunks_to_free_tail->next;
endpoint_chunks_to_free_tail->next = NULL;
endpoint_chunks_to_free_tail->to_free = free_entries;
}
our_btl_endpoint = (our_sctp_endpoint *) opal_list_remove_first(&sending_endpoints_freelist);
memset(our_btl_endpoint, 0, sizeof(our_sctp_endpoint));
our_btl_endpoint->endpoint = btl_endpoint;
opal_list_append(&sending_endpoints, (opal_list_item_t *) our_btl_endpoint);
btl_endpoint->endpoint_in_list++;
} else {
/* no endpoint is currently associated with sending on this socket */
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
endpoint_associated_with_send = btl_endpoint;
}
}
}
}
/*
* 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_sctp_endpoint_recv_blocking(mca_btl_base_endpoint_t* btl_endpoint, void* data, size_t size)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1 */
unsigned char* ptr = (unsigned char*)data;
size_t cnt = 0;
int retval;
int msg_flags=0;
struct sctp_sndrcvinfo sri;
while(cnt < size) {
/* We don't need to pass the sockaddr and len in
* sctp_recvmsg() as it's a TCP style 1 to 1 socket.
*/
retval = sctp_recvmsg(btl_endpoint->endpoint_sd, (char *)ptr+cnt, size-cnt,
0, 0, &sri, &msg_flags);
/* remote closed connection */
if((retval == -1 && (opal_socket_errno == ECONNRESET || opal_socket_errno == EBADF))
|| retval == 0) {
mca_btl_sctp_endpoint_close(btl_endpoint);
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) {
BTL_ERROR(("recv() failed with errno=%d",opal_socket_errno));
mca_btl_sctp_endpoint_close(btl_endpoint);
return -1;
}
continue;
}
SCTP_BTL_ERROR(("mca_btl_sctp_endpoint_recv_blocking() sd=%d, got %d bytes.\n", btl_endpoint->endpoint_sd, retval));
cnt += retval;
}
return cnt;
}
assert(0); /* not called in 1 to many, i don't think... */
return -1; /* never happens. avoids compiler warning. */
}
/*
* 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_sctp_endpoint_recv_connect_ack(mca_btl_base_endpoint_t* btl_endpoint)
{
ompi_process_name_t guid;
mca_btl_sctp_proc_t* btl_proc = btl_endpoint->endpoint_proc;
if((mca_btl_sctp_endpoint_recv_blocking(btl_endpoint, &guid,
sizeof(ompi_process_name_t))) != sizeof(ompi_process_name_t)) {
return OMPI_ERR_UNREACH;
}
ORTE_PROCESS_NAME_NTOH(guid);
/* compare this to the expected values */
if(memcmp(&btl_proc->proc_ompi->proc_name, &guid, sizeof(ompi_process_name_t)) != 0) {
BTL_ERROR(("received unexpected process identifier %s",
OMPI_NAME_PRINT(&guid)));
mca_btl_sctp_endpoint_close(btl_endpoint);
return OMPI_ERR_UNREACH;
}
/* connected */
mca_btl_sctp_endpoint_connected(btl_endpoint);
#if OPAL_ENABLE_DEBUG && WANT_PEER_DUMP
mca_btl_sctp_endpoint_dump(btl_endpoint, "connected");
#endif
return OMPI_SUCCESS;
}
int mca_btl_sctp_set_socket_options(int sd)
{
int optval, flags;
struct sctp_event_subscribe evnts;
/* register io event here to see populated sndrcvinfo struct */
memset(&evnts, 0, sizeof(evnts));
evnts.sctp_data_io_event = 1;
if(setsockopt(sd, IPPROTO_SCTP, SCTP_EVENTS, &evnts, sizeof(evnts)) < 0) {
BTL_ERROR(("setsockopt(SCTP_EVENTS) failed with errno=%d", opal_socket_errno));
return OMPI_ERROR;
}
/*TODO set maximum number of streams */
#if defined(SCTP_NODELAY)
optval = mca_btl_sctp_component.sctp_use_nodelay;
if(setsockopt(sd, IPPROTO_SCTP, SCTP_NODELAY, (char *)&optval, sizeof(optval)) < 0) {
BTL_ERROR(("setsockopt(SCTP_NODELAY) failed with errno=%d", opal_socket_errno));
return OMPI_ERROR;
}
#endif
#if defined(SO_SNDBUF)
if(mca_btl_sctp_component.sctp_sndbuf > 0 &&
setsockopt(sd, SOL_SOCKET, SO_SNDBUF, (char *)&mca_btl_sctp_component.sctp_sndbuf, sizeof(int)) < 0) {
BTL_ERROR(("setsockopt(SO_SNDBUF) failed with errno %d", opal_socket_errno));
return OMPI_ERROR;
}
#endif
#if defined(SO_RCVBUF)
if(mca_btl_sctp_component.sctp_rcvbuf > 0 &&
setsockopt(sd, SOL_SOCKET, SO_RCVBUF, (char *)&mca_btl_sctp_component.sctp_rcvbuf, sizeof(int)) < 0) {
BTL_ERROR(("setsockopt(SO_RCVBUF) failed with errno %d", opal_socket_errno));
return OMPI_ERROR;
}
#endif
/* set socket up to be non-blocking */
if((flags = fcntl(sd, F_GETFL, 0)) < 0) {
BTL_ERROR(("fcntl(F_GETFL) failed with errno=%d", opal_socket_errno));
return OMPI_ERROR;
} else {
flags |= O_NONBLOCK;
if(fcntl(sd, F_SETFL, flags) < 0) {
BTL_ERROR(("fcntl(F_SETFL) failed with errno=%d", opal_socket_errno));
return OMPI_ERROR;
}
}
return OMPI_SUCCESS;
}
/*
* 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_sctp_endpoint_start_connect(mca_btl_base_endpoint_t* btl_endpoint)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1 */
int rc;
struct sockaddr_in endpoint_addr;
btl_endpoint->endpoint_sd = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP);
if (btl_endpoint->endpoint_sd < 0) {
btl_endpoint->endpoint_retries++;
return OMPI_ERR_UNREACH;
}
/* bind NIC in this btl to this newly created socket */
if(bind(btl_endpoint->endpoint_sd, (struct sockaddr *)
&btl_endpoint->endpoint_btl->sctp_ifaddr,
sizeof(struct sockaddr_in)) < 0) {
return OMPI_ERR_FATAL;
}
/* setup socket buffer sizes */
if((rc = mca_btl_sctp_set_socket_options(btl_endpoint->endpoint_sd)) != OMPI_SUCCESS) {
return OMPI_ERR_FATAL;
}
/* setup event callbacks */
mca_btl_sctp_endpoint_event_init(btl_endpoint, btl_endpoint->endpoint_sd);
/* start the connect - will likely fail with EINPROGRESS */
memset(&endpoint_addr, 0, sizeof(endpoint_addr));
endpoint_addr.sin_family = AF_INET;
endpoint_addr.sin_addr = btl_endpoint->endpoint_addr->addr_inet;
endpoint_addr.sin_port = btl_endpoint->endpoint_addr->addr_port;
#ifdef FREEBSD
endpoint_addr.sin_len = sizeof(struct sockaddr);
#endif
if(connect(btl_endpoint->endpoint_sd, (struct sockaddr*)&endpoint_addr,
sizeof(endpoint_addr)) < 0)
{
/* non-blocking so wait for completion */
if(opal_socket_errno == EINPROGRESS ||
opal_socket_errno == EWOULDBLOCK)
{
btl_endpoint->endpoint_state = MCA_BTL_SCTP_CONNECTING;
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
return OMPI_SUCCESS;
}
SCTP_BTL_ERROR(("endpoint_close in start_connect #1\n"));
mca_btl_sctp_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_sctp_endpoint_send_connect_ack(btl_endpoint)) == OMPI_SUCCESS) {
btl_endpoint->endpoint_state = MCA_BTL_SCTP_CONNECT_ACK;
opal_event_add(&btl_endpoint->endpoint_recv_event, 0);
} else {
SCTP_BTL_ERROR(("endpoint_close in start_connect #2\n"));
mca_btl_sctp_endpoint_close(btl_endpoint);
}
return rc;
}
else {
/* 1 to many */
int rc;
struct sockaddr_in endpoint_addr;
/* setup event callbacks */
mca_btl_sctp_endpoint_event_init(btl_endpoint, btl_endpoint->endpoint_sd);
if (btl_endpoint->endpoint_sd < 0) {
btl_endpoint->endpoint_retries++;
return OMPI_ERR_UNREACH;
}
endpoint_addr = mca_btl_sctp_utils_sockaddr_from_endpoint(btl_endpoint);
/* send our globally unique process identifier to the endpoint */
if((rc = mca_btl_sctp_endpoint_send_connect_ack(btl_endpoint)) == OMPI_SUCCESS) {
/* Changing this to CONNECTED so that we bipass application level acks. */
mca_btl_sctp_endpoint_connected(btl_endpoint);
} else {
SCTP_BTL_ERROR(("endpoint_close in start_connect #3\n"));
mca_btl_sctp_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_sctp_endpoint_complete_connect(mca_btl_base_endpoint_t* btl_endpoint)
{
int so_error = 0;
opal_socklen_t so_length = sizeof(so_error);
/* 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() failed with errno=%d", opal_socket_errno));
mca_btl_sctp_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() failed with errno=%d", so_error));
mca_btl_sctp_endpoint_close(btl_endpoint);
return;
}
if(mca_btl_sctp_endpoint_send_connect_ack(btl_endpoint) == OMPI_SUCCESS) {
btl_endpoint->endpoint_state = MCA_BTL_SCTP_CONNECT_ACK;
opal_event_add(&btl_endpoint->endpoint_recv_event, 0);
} else {
mca_btl_sctp_endpoint_close(btl_endpoint);
}
}
/* used in 1-1 only */
/*
* A file descriptor is available/ready for recv. Check the state
* of the socket and take the appropriate action.
*/
static void mca_btl_sctp_endpoint_recv_handler(int sd, short flags, void* user)
{
char *foo;
int foo_len;
mca_btl_base_endpoint_t* btl_endpoint = (mca_btl_base_endpoint_t *)user;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_recv_lock);
switch(btl_endpoint->endpoint_state) {
case MCA_BTL_SCTP_CONNECT_ACK:
{
mca_btl_sctp_endpoint_recv_connect_ack(btl_endpoint);
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
break;
}
case MCA_BTL_SCTP_CONNECTED:
{
mca_btl_sctp_frag_t* frag;
frag = btl_endpoint->endpoint_recv_frag;
if(NULL == frag) {
if(mca_btl_sctp_module.super.btl_max_send_size >
mca_btl_sctp_module.super.btl_eager_limit) {
MCA_BTL_SCTP_FRAG_ALLOC_MAX(frag);
} else {
MCA_BTL_SCTP_FRAG_ALLOC_EAGER(frag);
}
if(NULL == frag) {
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
return;
}
MCA_BTL_SCTP_FRAG_INIT_DST(frag, btl_endpoint);
}
#if MCA_BTL_SCTP_ENDPOINT_CACHE
assert( 0 == btl_endpoint->endpoint_cache_length );
data_still_pending_on_endpoint:
#endif /* MCA_BTL_SCTP_ENDPOINT_CACHE */
/* check for completion of non-blocking recv on the current fragment */
/* Changed frag_recv call so adding dummy params here to allow
* compilation. This setup does not work for 1 to 1.
*/
if(mca_btl_sctp_frag_recv(frag, sd, foo, foo_len) == false) {
btl_endpoint->endpoint_recv_frag = frag;
} else {
btl_endpoint->endpoint_recv_frag = NULL;
switch(frag->hdr.type) {
case MCA_BTL_SCTP_HDR_TYPE_SEND:
{
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);
break;
}
default:
break;
}
#if MCA_BTL_SCTP_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_SCTP_FRAG_INIT_DST(frag, btl_endpoint);
goto data_still_pending_on_endpoint;
}
#endif /* MCA_BTL_SCTP_ENDPOINT_CACHE */
MCA_BTL_SCTP_FRAG_RETURN(frag);
}
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock);
#if MCA_BTL_SCTP_ENDPOINT_CACHE
assert( 0 == btl_endpoint->endpoint_cache_length );
#endif /* MCA_BTL_SCTP_ENDPOINT_CACHE */
break;
}
case MCA_BTL_SCTP_SHUTDOWN:
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));
mca_btl_sctp_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_sctp_endpoint_send_handler(int sd, short flags, void* user)
{
if(mca_btl_sctp_component.sctp_if_11) {
/* 1 to 1 */
mca_btl_sctp_endpoint_t* btl_endpoint = (mca_btl_sctp_endpoint_t *)user;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
switch(btl_endpoint->endpoint_state) {
case MCA_BTL_SCTP_CONNECTING:
mca_btl_sctp_endpoint_complete_connect(btl_endpoint);
break;
case MCA_BTL_SCTP_CONNECTED:
{
int btl_ownership;
/* complete the current send */
do {
mca_btl_sctp_frag_t* frag = btl_endpoint->endpoint_send_frag;
if(mca_btl_sctp_frag_send(frag, btl_endpoint->endpoint_sd) == false) {
break;
}
/* progress any pending sends */
btl_endpoint->endpoint_send_frag = (mca_btl_sctp_frag_t*)
opal_list_remove_first(&btl_endpoint->endpoint_frags);
btl_ownership = (frag->base.des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP);
/* if required - update request status and release fragment */
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc);
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
if( btl_ownership ) {
MCA_BTL_SCTP_FRAG_RETURN(frag);
}
} while (NULL != btl_endpoint->endpoint_send_frag);
/* 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);
}
else {
/* 1 to many */
mca_btl_sctp_endpoint_t* btl_endpoint = (mca_btl_sctp_endpoint_t *)user;
our_sctp_endpoint *current_our_endpoint = NULL;
ompi_vpid_t vpid;
send_handler_1_to_many_different_endpoint:
vpid = btl_endpoint->endpoint_proc->proc_ompi->proc_name.vpid;
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
if((mca_btl_sctp_proc_check_vpid(vpid, sender_proc_table)) == VALID_ENTRY) { int btl_ownership;
/* complete the current send */
do {
mca_btl_sctp_frag_t* frag = btl_endpoint->endpoint_send_frag;
if(NULL == frag) {
break;
}
if(mca_btl_sctp_frag_send(frag, btl_endpoint->endpoint_sd) == false) {
break;
}
/* progress any pending sends */
btl_endpoint->endpoint_send_frag = (mca_btl_sctp_frag_t*)
opal_list_remove_first(&btl_endpoint->endpoint_frags);
btl_ownership = (frag->base.des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP);
/* if required - update request status and release fragment */
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc);
OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock);
if( btl_ownership ) {
MCA_BTL_SCTP_FRAG_RETURN(frag);
}
}while (NULL != btl_endpoint->endpoint_send_frag);
/* if nothing else to do unregister for send event notifications */
if(NULL == btl_endpoint->endpoint_send_frag && NULL == current_our_endpoint) {
/* remove the send event with this endpoint */
opal_event_del(&btl_endpoint->endpoint_send_event);
endpoint_associated_with_send = NULL;
/* see if there is another endpoint that wants the send event */
if(opal_list_get_size(&sending_endpoints) > 0) {
/* entries in the list may be stale from walk-throughs, so prune these
* while verifying the entries. now pruned everytime the endpoint associated with
* POLLOUT on the one-to-many socket completes sending all of its frags.
*/
our_sctp_endpoint *our_btl_endpoint;
mca_btl_sctp_endpoint_t *next_endpoint;
while(opal_list_get_size(&sending_endpoints)) {
our_btl_endpoint = (our_sctp_endpoint *) opal_list_remove_first(&sending_endpoints);
next_endpoint = our_btl_endpoint->endpoint;
if(NULL == next_endpoint->endpoint_send_frag)
{
/* stale entry */
opal_list_append(&sending_endpoints_freelist, (opal_list_item_t *) our_btl_endpoint);
our_btl_endpoint = NULL;
next_endpoint->endpoint_in_list--;
continue;
}
else
{
/* go with this one */
break;
}
}
if(NULL != our_btl_endpoint)
{
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
OPAL_THREAD_LOCK(&next_endpoint->endpoint_send_lock);
btl_endpoint = next_endpoint;
assert(btl_endpoint->endpoint_in_list > 0);
btl_endpoint->endpoint_in_list--;
opal_event_add(&btl_endpoint->endpoint_send_event, 0);
opal_list_append(&sending_endpoints_freelist, (opal_list_item_t *) our_btl_endpoint);
endpoint_associated_with_send = btl_endpoint;
goto send_handler_1_to_many_different_endpoint;
}
}
} else if(opal_list_get_size(&sending_endpoints) > 0) {
/* sending_endpoints might contain entries with different endpoints (i.e. non-duplicates) */
/* This case happens if one association on the one-to-many socket returns EAGAIN but we
* want to try another association on the same socket (in the kernel, different associations
* have different buffers despite sharing the same socket).
*/
/* if we're in the middle of a traversal and we've completed all the frags on some endpoint,
* we need to remove it from the list */
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
if(NULL == current_our_endpoint)
{
/* start traversing the list */
current_our_endpoint = (our_sctp_endpoint *) opal_list_get_first(&sending_endpoints);
sending_endpoints_walk_count = 0;
}
else
{
/* continue traversing the list */
current_our_endpoint = (our_sctp_endpoint *) opal_list_get_next(current_our_endpoint);
sending_endpoints_walk_count++;
}
if(NULL != current_our_endpoint &&
sending_endpoints_walk_count < (int) opal_list_get_size(&sending_endpoints))
{
btl_endpoint = current_our_endpoint->endpoint;
goto send_handler_1_to_many_different_endpoint;
}
else { /* done walking through sending_endpoints list */
return; /* don't want to unlock the send_lock twice */
}
}
}
else {
BTL_ERROR(("invalid connection state (%d)",
btl_endpoint->endpoint_state));
/*TODO: update del code to use sending_endpoints list */
opal_event_del(&btl_endpoint->endpoint_send_event);
}
OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock);
}
}
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