/*
* 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_ep_disconnect.c
*
* PURPOSE: Endpoint management
* Description: Interfaces in this file are completely described in
* the DAPL 1.1 API, Chapter 6, section 5
*
* $Id: dapl_ep_disconnect.c,v 1.15 2003/07/30 18:13:37 hobie16 Exp $
*/
#include "dapl.h"
#include "dapl_ia_util.h"
#include "dapl_ep_util.h"
#include "dapl_evd_util.h"
#include "dapl_adapter_util.h"
/*
* dapl_ep_disconnect
*
* DAPL Requirements Version xxx, 6.5.9
*
* Terminate a connection.
*
* Input:
* ep_handle
* disconnect_flags
*
* Output:
* None
*
* Returns:
* DAT_SUCCESS
* DAT_INSUFFICIENT_RESOURCES
* DAT_INVALID_PARAMETER
*/
DAT_RETURN
dapl_ep_disconnect(
IN DAT_EP_HANDLE ep_handle,
IN DAT_CLOSE_FLAGS disconnect_flags)
{
DAPL_EP *ep_ptr;
DAT_RETURN dat_status;
dapl_dbg_log(DAPL_DBG_TYPE_API | DAPL_DBG_TYPE_CM,
"dapl_ep_disconnect (%p, %x)\n", ep_handle, disconnect_flags);
ep_ptr = (DAPL_EP *) ep_handle;
/*
* Verify parameter & state
*/
if (DAPL_BAD_HANDLE(ep_ptr, DAPL_MAGIC_EP)) {
dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
DAT_INVALID_HANDLE_EP);
goto bail;
}
/*
* Do the verification of parameters and the state change
* atomically.
*/
dapl_os_lock(&ep_ptr->header.lock);
/*
* Check the EP state to ensure we are queiscent. Note that
* we may get called in UNCONNECTED state in order to remove
* RECV requests from the queue prior to destroying an EP.
* See the states in the spec at 6.5.1 Endpont Lifecycle
*/
if (ep_ptr->param.ep_state != DAT_EP_STATE_CONNECTED &&
ep_ptr->param.ep_state != DAT_EP_STATE_DISCONNECTED &&
ep_ptr->param.ep_state != DAT_EP_STATE_ACTIVE_CONNECTION_PENDING &&
ep_ptr->param.ep_state != DAT_EP_STATE_COMPLETION_PENDING &&
ep_ptr->param.ep_state != DAT_EP_STATE_DISCONNECT_PENDING) {
dapl_os_unlock(&ep_ptr->header.lock);
dat_status = DAT_ERROR(DAT_INVALID_STATE,
dapls_ep_state_subtype(ep_ptr));
goto bail;
}
if (ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECTED) {
/*
* Calling disconnect when DISCONNECTED is a NOOP, just return
* good.
*/
dapl_os_unlock(&ep_ptr->header.lock);
dat_status = DAT_SUCCESS;
goto bail;
}
if (ep_ptr->param.ep_state == DAT_EP_STATE_DISCONNECT_PENDING &&
disconnect_flags != DAT_CLOSE_ABRUPT_FLAG) {
/*
* If in state DISCONNECT_PENDING then this must be an
* ABRUPT disconnect
*/
dapl_os_unlock(&ep_ptr->header.lock);
dat_status = DAT_ERROR(DAT_INVALID_PARAMETER, DAT_INVALID_ARG2);
goto bail;
}
if (ep_ptr->param.ep_state == DAT_EP_STATE_ACTIVE_CONNECTION_PENDING ||
ep_ptr->param.ep_state == DAT_EP_STATE_COMPLETION_PENDING) {
/*
* transition ep_state to DISCONNECT_PENDING
*/
ep_ptr->param.ep_state = DAT_EP_STATE_DISCONNECT_PENDING;
dapl_os_unlock(&ep_ptr->header.lock);
dapls_ib_disconnect_clean(ep_ptr, DAT_TRUE,
IB_CME_CONNECTION_REQUEST_PENDING);
/*
* we do not have to post an event here.
* the CM will generate one.
*/
dat_status = DAT_SUCCESS;
goto bail;
}
/*
* Transition the EP state to DISCONNECT_PENDING if we are
* CONNECTED. Otherwise we do not get a disconnect event and will be
* stuck in DISCONNECT_PENDING.
*
* If the user specifies a graceful disconnect, the underlying
* provider should complete all DTOs before disconnecting; in IB
* terms, this means setting the QP state to SQD before completing
* the disconnect state transitions.
*/
if (ep_ptr->param.ep_state == DAT_EP_STATE_CONNECTED) {
ep_ptr->param.ep_state = DAT_EP_STATE_DISCONNECT_PENDING;
}
dapl_os_unlock(&ep_ptr->header.lock);
dat_status = dapls_ib_disconnect(ep_ptr, disconnect_flags);
bail:
dapl_dbg_log(DAPL_DBG_TYPE_RTN | DAPL_DBG_TYPE_CM,
"dapl_ep_disconnect () returns 0x%x\n", dat_status);
return (dat_status);
}