udapl_tavor/common/dapl_psp_create.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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 *
 * MODULE: dapl_psp_create.c
 *
 * PURPOSE: Connection management
 * Description: Interfaces in this file are completely described in
 *      the DAPL 1.1 API, Chapter 6, section 4
 *
 * $Id: dapl_psp_create.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_psp_create
 *
 * uDAPL: User Direct Access Program Library Version 1.1, 6.4.1.1
 *
 * Create a persistent Public Service Point that can recieve multiple
 * requests for connections and generate multiple connection request
 * instances that wil be delivered to the specified Event Dispatcher
 * in a notification event.
 *
 * Input:
 *  ia_handle
 *  conn_qual
 *  evd_handle
 *  psp_flags
 *
 * Output:
 *  psp_handle
 *
 * Returns:
 *  DAT_SUCCESS
 *  DAT_INSUFFICIENT_RESOURCES
 *  DAT_INVALID_PARAMETER
 *  DAT_CONN_QUAL_IN_USE
 *  DAT_MODEL_NOT_SUPPORTED
 */
DAT_RETURN
dapl_psp_create(
    IN DAT_IA_HANDLE       ia_handle,
    IN DAT_CONN_QUAL       conn_qual,
    IN DAT_EVD_HANDLE      evd_handle,
    IN DAT_PSP_FLAGS       psp_flags,
    OUT DAT_PSP_HANDLE     *psp_handle)
{
    DAPL_IA *ia_ptr;
    DAPL_SP *sp_ptr;
    DAPL_EVD *evd_ptr;
    DAT_BOOLEAN sp_found;
    DAT_RETURN dat_status;

    ia_ptr = (DAPL_IA *)ia_handle;
    dat_status = DAT_SUCCESS;

    if (DAPL_BAD_HANDLE(ia_ptr, DAPL_MAGIC_IA)) {
        dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
            DAT_INVALID_HANDLE_IA);
        goto bail;
    }

    if (DAPL_BAD_HANDLE(evd_handle, DAPL_MAGIC_EVD)) {
        dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
            DAT_INVALID_HANDLE_EVD_CR);
        goto bail;
    }

    if (psp_handle == NULL) {
        dat_status = DAT_ERROR(DAT_INVALID_PARAMETER, DAT_INVALID_ARG5);
        goto bail;
    }

    /* check for invalid psp flags */
    if ((psp_flags != DAT_PSP_CONSUMER_FLAG) &&
        (psp_flags != DAT_PSP_PROVIDER_FLAG)) {
        dat_status = DAT_ERROR(DAT_INVALID_PARAMETER, DAT_INVALID_ARG4);
        goto bail;
    }

    evd_ptr = (DAPL_EVD *)evd_handle;
    if (!(evd_ptr->evd_flags & DAT_EVD_CR_FLAG)) {
        dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
            DAT_INVALID_HANDLE_EVD_CR);
        goto bail;
    }

    /*
     * check for connection qualifier eq 0
     * in IB this is called Null Service ID, use of it in CM is invalid.
     * in tcp/udp, port number 0 is reserved.
     */
    if (!conn_qual) {
        dat_status = DAT_ERROR(DAT_INVALID_PARAMETER, DAT_INVALID_ARG2);
        goto bail;
    }

    /*
     * See if we have a quiescent listener to use for this PSP, else
     * create one and set it listening
     */
    sp_ptr = dapls_ia_sp_search(ia_ptr, conn_qual, DAT_TRUE);
    sp_found = DAT_TRUE;
    if (sp_ptr == NULL) {
        /* Allocate PSP */
        sp_found = DAT_FALSE;
        sp_ptr   = dapls_sp_alloc(ia_ptr, DAT_TRUE);

        if (sp_ptr == NULL) {
            dat_status = DAT_ERROR(DAT_INSUFFICIENT_RESOURCES,
                DAT_RESOURCE_MEMORY);
            goto bail;
        }
    } else if (sp_ptr->listening == DAT_TRUE) {
        dat_status = DAT_ERROR(DAT_CONN_QUAL_IN_USE, 0);
        goto bail;
    }

    /*
     * Fill out the args for a PSP
     */
    sp_ptr->ia_handle  = ia_handle;
    sp_ptr->conn_qual  = conn_qual;
    sp_ptr->evd_handle = evd_handle;
    sp_ptr->psp_flags  = psp_flags;
    sp_ptr->ep_handle  = NULL;

    /*
     * Take a reference on the EVD handle
     */
    (void) dapl_os_atomic_inc(&((DAPL_EVD *)evd_handle)->evd_ref_count);

    /*
     * Set up a listener for a connection. Connections can arrive
     * even before this call returns!
     */
    sp_ptr->state = DAPL_SP_STATE_PSP_LISTENING;
    sp_ptr->listening = DAT_TRUE;

    /*
     * If this is a new sp we need to add it to the IA queue, and set up
     * a conn_listener.
     */
    if (sp_found == DAT_FALSE) {

        /* Link it onto the IA */
        dapl_ia_link_psp(ia_ptr, sp_ptr);

        dat_status = dapls_ib_setup_conn_listener(ia_ptr, conn_qual,
            sp_ptr);

        if (dat_status != DAT_SUCCESS) {
            /*
             * Have a problem setting up the connection, something
             * wrong!  The psp_free decrements the EVD refcount for
             * us; we don't * need to do that.
             * But we want to set the listener bits to false,
             * as we know that call failed.
             */
            sp_ptr->state = DAPL_SP_STATE_FREE;
            sp_ptr->listening = DAT_FALSE;
            (void) dapl_psp_free((DAT_PSP_HANDLE) sp_ptr);

            dapl_dbg_log(DAPL_DBG_TYPE_CM,
                "--> dapl_psp_create setup_conn_listener failed: "
                "%x\n",
                dat_status);

            goto bail;
        }
    }

    /*
     * Return handle to the user
     */
    *psp_handle = (DAT_PSP_HANDLE)sp_ptr;

bail:
    return (dat_status);
}