/* * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana * University Research and Technology * Corporation. All rights reserved. * Copyright (c) 2004-2005 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 * * $HEADER$ */ #include "ompi_config.h" #include #include #ifdef HAVE_UNISTD_H #include #endif #include "include/ompi_socket_errno.h" #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_NETINET_TCP_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #include #include #include "include/types.h" #include "mca/ns/base/base.h" #include "mca/oob/base/base.h" #include "mca/rml/rml.h" #include "mca/errmgr/errmgr.h" #include "mca/btl/base/btl_base_error.h" #include "dps/dps.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_send_event.ev_flags = 0; endpoint->endpoint_recv_event.ev_flags = 0; endpoint->endpoint_state = MCA_BTL_TCP_CLOSED; endpoint->endpoint_retries = 0; endpoint->endpoint_nbo = false; 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); #define IMPORTANT_WINDOWS_COMMENT() \ /* 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 */ 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; struct sockaddr_in inaddr; ompi_socklen_t obtlen; ompi_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", ompi_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", ompi_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", ompi_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: errno %d", ompi_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_tcp_endpoint_event_init(mca_btl_base_endpoint_t* btl_endpoint, int sd) { opal_event_set( &btl_endpoint->endpoint_recv_event, btl_endpoint->endpoint_sd, OPAL_EV_READ|OPAL_EV_PERSIST, mca_btl_tcp_endpoint_recv_handler, btl_endpoint); opal_event_set( &btl_endpoint->endpoint_send_event, btl_endpoint->endpoint_sd, OPAL_EV_WRITE|OPAL_EV_PERSIST, 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); 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)) { OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_send_lock); frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc); 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_TCP_SHUTDOWN: rc = OMPI_ERROR; 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) { IMPORTANT_WINDOWS_COMMENT(); if(ompi_socket_errno != EINTR && ompi_socket_errno != EAGAIN && ompi_socket_errno != EWOULDBLOCK) { BTL_ERROR(("send() failed with errno=%d",ompi_socket_errno)); 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(); if(mca_btl_tcp_endpoint_send_blocking(btl_endpoint, &btl_proc->proc_name, sizeof(btl_proc->proc_name)) != sizeof(btl_proc->proc_name)) { 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_in* addr, int sd) { mca_btl_tcp_addr_t* btl_addr; mca_btl_tcp_proc_t* this_proc = mca_btl_tcp_proc_local(); orte_ns_cmp_bitmask_t mask = ORTE_NS_CMP_ALL; 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_tcp_proc_t *endpoint_proc = btl_endpoint->endpoint_proc; cmpval = orte_ns.compare(mask, &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) { 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, sd); opal_event_add(&btl_endpoint->endpoint_recv_event, 0); mca_btl_tcp_endpoint_connected(btl_endpoint); #if OMPI_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) { opal_event_del(&btl_endpoint->endpoint_recv_event); opal_event_del(&btl_endpoint->endpoint_send_event); close(btl_endpoint->endpoint_sd); btl_endpoint->endpoint_sd = -1; } btl_endpoint->endpoint_state = MCA_BTL_TCP_CLOSED; btl_endpoint->endpoint_retries++; } void mca_btl_tcp_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_tcp_endpoint_close(btl_endpoint); btl_endpoint->endpoint_state = MCA_BTL_TCP_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_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; 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 -1; } /* socket is non-blocking so handle errors */ if(retval < 0) { IMPORTANT_WINDOWS_COMMENT(); if(ompi_socket_errno != EINTR && ompi_socket_errno != EAGAIN && ompi_socket_errno != EWOULDBLOCK) { BTL_ERROR(("recv() failed with errno=%d",ompi_socket_errno)); 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) { orte_process_name_t guid; mca_btl_tcp_proc_t* btl_proc = btl_endpoint->endpoint_proc; if((mca_btl_tcp_endpoint_recv_blocking(btl_endpoint, &guid, sizeof(orte_process_name_t))) != sizeof(orte_process_name_t)) { return OMPI_ERR_UNREACH; } /* compare this to the expected values */ if(memcmp(&btl_proc->proc_name, &guid, sizeof(orte_process_name_t)) != 0) { BTL_ERROR(("received unexpected process identifier [%lu,%lu,%lu]", ORTE_NAME_ARGS(&guid))); mca_btl_tcp_endpoint_close(btl_endpoint); return OMPI_ERR_UNREACH; } /* connected */ mca_btl_tcp_endpoint_connected(btl_endpoint); #if OMPI_ENABLE_DEBUG && WANT_PEER_DUMP mca_btl_tcp_endpoint_dump(btl_endpoint, "connected"); #endif return OMPI_SUCCESS; } void mca_btl_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) { BTL_ERROR(("setsockopt(TCP_NODELAY) failed with errno=%d", ompi_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 with errno %d", ompi_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 with errno %d", ompi_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_in endpoint_addr; btl_endpoint->endpoint_sd = socket(AF_INET, 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, btl_endpoint->endpoint_sd); /* setup the socket as non-blocking */ if((flags = fcntl(btl_endpoint->endpoint_sd, F_GETFL, 0)) < 0) { BTL_ERROR(("fcntl(F_GETFL) failed with errno=%d", ompi_socket_errno)); } else { flags |= O_NONBLOCK; if(fcntl(btl_endpoint->endpoint_sd, F_SETFL, flags) < 0) BTL_ERROR(("fcntl(F_SETFL) failed with errno=%d", ompi_socket_errno)); } /* start the connect - will likely fail with EINPROGRESS */ 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; if(connect(btl_endpoint->endpoint_sd, (struct sockaddr*)&endpoint_addr, sizeof(endpoint_addr)) < 0) { /* non-blocking so wait for completion */ IMPORTANT_WINDOWS_COMMENT(); if(ompi_socket_errno == EINPROGRESS || ompi_socket_errno == EWOULDBLOCK) { btl_endpoint->endpoint_state = MCA_BTL_TCP_CONNECTING; opal_event_add(&btl_endpoint->endpoint_send_event, 0); return OMPI_SUCCESS; } 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 { 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; ompi_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", ompi_socket_errno)); mca_btl_tcp_endpoint_close(btl_endpoint); return; } IMPORTANT_WINDOWS_COMMENT(); 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_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 { 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; OPAL_THREAD_LOCK(&btl_endpoint->endpoint_recv_lock); switch(btl_endpoint->endpoint_state) { case MCA_BTL_TCP_CONNECT_ACK: { mca_btl_tcp_endpoint_recv_connect_ack(btl_endpoint); OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock); break; } case MCA_BTL_TCP_CONNECTED: { mca_btl_tcp_frag_t* frag = btl_endpoint->endpoint_recv_frag; if(NULL == frag) { int rc; MCA_BTL_TCP_FRAG_ALLOC_MAX(frag, rc); if(NULL == frag) { OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock); return; } MCA_BTL_TCP_FRAG_INIT_DST(frag, btl_endpoint); } /* check for completion of non-blocking recv on the current fragment */ if(mca_btl_tcp_frag_recv(frag, sd) == false) { btl_endpoint->endpoint_recv_frag = frag; OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock); } else { btl_endpoint->endpoint_recv_frag = NULL; OPAL_THREAD_UNLOCK(&btl_endpoint->endpoint_recv_lock); switch(frag->hdr.type) { case MCA_BTL_TCP_HDR_TYPE_SEND: { mca_btl_base_recv_reg_t* reg = frag->btl->tcp_reg + frag->hdr.base.tag; reg->cbfunc(&frag->btl->super, frag->hdr.base.tag, &frag->base, reg->cbdata); break; } default: { break; } } MCA_BTL_TCP_FRAG_RETURN_MAX(frag); } break; } case MCA_BTL_TCP_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_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 */ do { mca_btl_tcp_frag_t* frag = btl_endpoint->endpoint_send_frag; 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); frag->base.des_cbfunc(&frag->btl->super, frag->endpoint, &frag->base, frag->rc); OPAL_THREAD_LOCK(&btl_endpoint->endpoint_send_lock); } 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); }