/*
 * 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 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 *
 * MODULE: dapl_rsp_free.c
 *
 * PURPOSE: Connection management
 * Description: Interfaces in this file are completely described in
 *              the DAPL 1.1 API, Chapter 6, section 4
 *
 * $Id: dapl_rsp_free.c,v 1.16 2003/07/25 19:24:11 sjs2 Exp $
 */

#include "dapl.h"
#include "dapl_sp_util.h"
#include "dapl_ia_util.h"
#include "dapl_adapter_util.h"

/*
 * dapl_rsp_free
 *
 * uDAPL: User Direct Access Program Library Version 1.1, 6.4.3.5
 *
 * Destroy a specific instance of a Reserved Service Point.
 *
 * Input:
 *      rsp_handle
 *
 * Output:
 *      none
 *
 * Returns:
 *      DAT_SUCCESS
 *      DAT_INVALID_HANDLE
 */
DAT_RETURN
dapl_rsp_free(
        IN      DAT_RSP_HANDLE     rsp_handle)
{
        DAPL_IA         *ia_ptr;
        DAPL_SP         *sp_ptr;
        DAPL_EP         *ep_ptr;
        DAT_RETURN              dat_status;

        dat_status = DAT_SUCCESS;

        sp_ptr = (DAPL_SP *)rsp_handle;
        /*
         * Verify handle
         */
        dapl_dbg_log(DAPL_DBG_TYPE_CM,
            ">>> dapl_rsp_free %p\n",
            rsp_handle);
        if (DAPL_BAD_HANDLE(sp_ptr, DAPL_MAGIC_RSP)) {
                dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
                    DAT_INVALID_HANDLE_RSP);
                goto bail;
        }

        /* ia_ptr = (DAPL_IA *)sp_ptr->header.owner_ia; */
        ia_ptr = sp_ptr->header.owner_ia;

        /*
         * Remove the connection listener if there are no connections.  If
         * we defer removing the sp it becomes something of a zombie
         * container until disconnection, after which it will be cleaned up.
         */
        dapl_os_lock(&sp_ptr->header.lock);

        /*
         * Make sure we don't leave a dangling EP. If the state is still
         * RESERVED then the RSP still owns it.
         */
        ep_ptr = (DAPL_EP *)sp_ptr->ep_handle;
        if (ep_ptr->param.ep_state == DAT_EP_STATE_RESERVED) {
                ep_ptr->param.ep_state = DAT_EP_STATE_UNCONNECTED;
        }
        sp_ptr->ep_handle = NULL;

        /* Release reference on EVD */
        dapl_os_atomic_dec(&((DAPL_EVD *)sp_ptr->evd_handle)->evd_ref_count);
        sp_ptr->evd_handle = NULL;

        /*
         * Release the base resource if there are no outstanding connections;
         * else the last disconnect on this RSP will free it up. The RSP
         * is used to contain CR records for each connection, which
         * contain information necessary to disconnect.
         */
        if (sp_ptr->listening == DAT_TRUE && sp_ptr->cr_list_count == 0) {
                sp_ptr->listening       = DAT_FALSE;
                sp_ptr->state           = DAPL_SP_STATE_FREE;
                dapl_os_unlock(&sp_ptr->header.lock);
                dat_status = dapls_ib_remove_conn_listener(ia_ptr, sp_ptr);
                if (dat_status != DAT_SUCCESS) {
                        sp_ptr->listening = DAT_TRUE;
                        sp_ptr->state = DAPL_SP_STATE_RSP_LISTENING;
                        goto bail;
                }
                dapls_ia_unlink_sp(ia_ptr, sp_ptr);
                dapls_sp_free_sp(sp_ptr);

        } else {
                /*
                 * The RSP is now in the pending state, where it will sit until
                 * the connection terminates or the app uses the same
                 * ServiceID again, which will reactivate it.
                 */
                sp_ptr->state = DAPL_SP_STATE_RSP_PENDING;
                dapl_os_unlock(&sp_ptr->header.lock);
        }

bail:
        return (dat_status);
}

/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 *  c-brace-offset: -4
 *  tab-width: 8
 * End:
 */