OpenSolaris_b135/lib/udapl/udapl_tavor/common/dapl_cr_accept.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
*
* MODULE: dapl_cr_accept.c
*
* PURPOSE: Connection management
* Description: Interfaces in this file are completely described in
* the DAPL 1.1 API, Chapter 6, section 4
*
* $Id: dapl_cr_accept.c,v 1.21 2003/08/08 19:20:05 sjs2 Exp $
*/
#include "dapl.h"
#include "dapl_adapter_util.h"
/*
* dapl_cr_accept
*
* DAPL Requirements Version xxx, 6.4.2.1
*
* Establish a connection between active remote side requesting Endpoint
* and passic side local Endpoint.
*
* Input:
* cr_handle
* ep_handle
* private_data_size
* private_data
*
* Output:
* none
*
* Returns:
* DAT_SUCCESS
* DAT_INVALID_PARAMETER
* DAT_INVALID_ATTRIBUTE
*/
DAT_RETURN
dapl_cr_accept(
IN DAT_CR_HANDLE cr_handle,
IN DAT_EP_HANDLE ep_handle,
IN DAT_COUNT private_data_size,
IN const DAT_PVOID private_data)
{
DAPL_EP *ep_ptr;
DAT_RETURN dat_status;
DAPL_PRIVATE prd;
DAPL_CR *cr_ptr;
DAT_EP_STATE entry_ep_state;
DAT_EP_HANDLE entry_ep_handle;
dapl_dbg_log(DAPL_DBG_TYPE_API,
"dapl_cr_accept(%p, %p, %d, %p)\n",
cr_handle, ep_handle, private_data_size, private_data);
if (DAPL_BAD_HANDLE(cr_handle, DAPL_MAGIC_CR)) {
dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
DAT_INVALID_HANDLE_CR);
goto bail;
}
cr_ptr = (DAPL_CR *) cr_handle;
/*
* Return an error if we have an ep_handle and the CR already has an
* EP, indicating this is an RSP connection or PSP_PROVIDER_FLAG was
* specified.
*/
if (ep_handle != NULL &&
(DAPL_BAD_HANDLE(ep_handle, DAPL_MAGIC_EP) ||
cr_ptr->param.local_ep_handle != NULL)) {
dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
DAT_INVALID_HANDLE_EP);
goto bail;
}
if ((0 != private_data_size) && (NULL == private_data)) {
dat_status = DAT_ERROR(DAT_INVALID_PARAMETER, DAT_INVALID_ARG4);
goto bail;
}
/*
* Verify the private data size doesn't exceed the max
*/
if (private_data_size > DAPL_CONSUMER_MAX_PRIVATE_DATA_SIZE) {
dat_status = DAT_ERROR(DAT_INVALID_PARAMETER, DAT_INVALID_ARG3);
goto bail;
}
/*
* ep_handle is NULL if the user specified DAT_PSP_PROVIDER_FLAG
* OR this is an RSP connection; retrieve it from the cr.
*/
if (ep_handle == NULL) {
ep_handle = cr_ptr->param.local_ep_handle;
if ((((DAPL_EP *) ep_handle)->param.ep_state !=
DAT_EP_STATE_TENTATIVE_CONNECTION_PENDING) &&
(((DAPL_EP *)ep_handle)->param.ep_state !=
DAT_EP_STATE_PASSIVE_CONNECTION_PENDING)) {
return (DAT_INVALID_STATE);
}
} else {
/* ensure this EP isn't connected or in use */
if (((DAPL_EP *)ep_handle)->param.ep_state !=
DAT_EP_STATE_UNCONNECTED) {
return (DAT_INVALID_STATE);
}
}
ep_ptr = (DAPL_EP *) ep_handle;
/*
* Verify the attributes of the EP handle before we connect it. Test
* all of the handles to make sure they are currently valid.
* Specifically:
* pz_handle required
* recv_evd_handle optional, but must be valid
* request_evd_handle optional, but must be valid
* connect_evd_handle required
* We do all verification and state change under lock, at which
* point the EP state should protect us from most races.
*/
dapl_os_lock(&ep_ptr->header.lock);
if ((ep_ptr->param.pz_handle == NULL) ||
DAPL_BAD_HANDLE(ep_ptr->param.pz_handle, DAPL_MAGIC_PZ) ||
(ep_ptr->param.connect_evd_handle == NULL) ||
DAPL_BAD_HANDLE(ep_ptr->param.connect_evd_handle, DAPL_MAGIC_EVD) ||
!(((DAPL_EVD *)ep_ptr->param.connect_evd_handle)->evd_flags &
DAT_EVD_CONNECTION_FLAG) ||
(ep_ptr->param.recv_evd_handle != DAT_HANDLE_NULL &&
(DAPL_BAD_HANDLE(ep_ptr->param.recv_evd_handle, DAPL_MAGIC_EVD))) ||
(ep_ptr->param.request_evd_handle != DAT_HANDLE_NULL &&
(DAPL_BAD_HANDLE(ep_ptr->param.request_evd_handle,
DAPL_MAGIC_EVD)))) {
dapl_os_unlock(&ep_ptr->header.lock);
dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
DAT_INVALID_HANDLE_EP);
goto bail;
}
if (ep_ptr->qp_state == DAPL_QP_STATE_UNATTACHED) {
/*
* If we are lazy attaching the QP then we may need to
* hook it up here. Typically, we run this code only for
* DAT_PSP_PROVIDER_FLAG
*/
dat_status = dapls_ib_qp_alloc(cr_ptr->header.owner_ia, ep_ptr,
ep_ptr);
if (dat_status != DAT_SUCCESS) {
/* This is not a great error code, but spec allows */
dapl_os_unlock(&ep_ptr->header.lock);
dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
DAT_INVALID_HANDLE_EP);
goto bail;
}
}
entry_ep_state = ep_ptr->param.ep_state;
entry_ep_handle = cr_ptr->param.local_ep_handle;
ep_ptr->param.ep_state = DAT_EP_STATE_COMPLETION_PENDING;
ep_ptr->cm_handle = cr_ptr->ib_cm_handle;
ep_ptr->cr_ptr = cr_ptr;
ep_ptr->param.remote_ia_address_ptr = cr_ptr->param.
remote_ia_address_ptr;
cr_ptr->param.local_ep_handle = ep_handle;
/*
* private data
*/
(void) dapl_os_memcpy(prd.private_data, private_data,
private_data_size);
(void) dapl_os_memzero(prd.private_data + private_data_size,
sizeof (DAPL_PRIVATE) - private_data_size);
dapl_os_unlock(&ep_ptr->header.lock);
dat_status = dapls_ib_accept_connection(cr_handle, ep_handle, &prd);
/*
* If the provider failed, unwind the damage so we are back at
* the initial state.
*/
if (dat_status != DAT_SUCCESS) {
ep_ptr->param.ep_state = entry_ep_state;
cr_ptr->param.local_ep_handle = entry_ep_handle;
} else {
/*
* Make this CR invalid. We need to hang on to it until
* the connection terminates, but it's destroyed from
* the app point of view.
*/
cr_ptr->header.magic = DAPL_MAGIC_CR_DESTROYED;
}
bail:
return (dat_status);
}