udapl_tavor/common/dapl_evd_modify_cno.c

9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * CDDL HEADER START
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * The contents of this file are subject to the terms of the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Common Development and Distribution License (the "License").
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * You may not use this file except in compliance with the License.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * or http://www.opensolaris.org/os/licensing.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * See the License for the specific language governing permissions
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * and limitations under the License.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * When distributing Covered Code, include this CDDL HEADER in each
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * If applicable, add the following below this CDDL HEADER, with the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * fields enclosed by brackets "[]" replaced with your own identifying
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * information: Portions Copyright [yyyy] [name of copyright owner]
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * CDDL HEADER END
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Use is subject to license terms.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * MODULE: dapl_evd_modify_cno.c
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * PURPOSE: Event Management
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Description: Interfaces in this file are completely described in
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *      the DAPL 1.1 API, Chapter 6, section 3
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * $Id: dapl_evd_modify_cno.c,v 1.10 2003/07/14 17:50:32 sjs2 Exp $
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "dapl.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#include "dapl_adapter_util.h"
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * dapl_evd_modify_cno
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * DAPL Requirements Version xxx, 6.3.2.4
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Modify the CNO associated with the EVD
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Input:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  evd_handle
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  cno_handle
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Output:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  none
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Returns:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  DAT_SUCCSSS
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor *  DAT_INVALID_HANDLE
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill TaylorDAT_RETURN
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylordapl_evd_modify_cno(
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    IN  DAT_EVD_HANDLE      evd_handle,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    IN  DAT_CNO_HANDLE      cno_handle)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor{
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAPL_EVD    *evd_ptr;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAPL_CNO    *cno_ptr;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAPL_CNO    *old_cno_ptr;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    DAT_RETURN  dat_status;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    evd_ptr = (DAPL_EVD *)evd_handle;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    cno_ptr = (DAPL_CNO *)cno_handle;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    dat_status = DAT_SUCCESS;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (DAPL_BAD_HANDLE(evd_handle, DAPL_MAGIC_EVD)) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 0);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        goto bail;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* cno_handle of DAT_HANDLE_NULL disassociated the EVD with any CNO */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if ((cno_handle != DAT_HANDLE_NULL) &&
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        DAPL_BAD_HANDLE(cno_handle, DAPL_MAGIC_CNO)) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            DAT_INVALID_HANDLE_CNO);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        goto bail;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /* nothing to change */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (cno_ptr == evd_ptr->cno_ptr) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = DAT_SUCCESS;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        goto bail;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (dapls_ib_modify_cno(evd_ptr, cno_ptr) != DAT_SUCCESS) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 0);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        goto bail;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    dapl_os_lock(&evd_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    old_cno_ptr = evd_ptr->cno_ptr;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    evd_ptr->cno_ptr = cno_ptr;
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    dapl_os_unlock(&evd_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * We need to first remove the evd from the old CNO's list before
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * adding it to the new CNO's list
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (old_cno_ptr) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_lock(&(old_cno_ptr->header.lock));
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        (void) dapl_llist_remove_entry(&old_cno_ptr->evd_list_head,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            &evd_ptr->cno_list_entry);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_atomic_dec(&(old_cno_ptr->cno_ref_count));
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_unlock(&(old_cno_ptr->header.lock));
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if (cno_ptr) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_lock(&(cno_ptr->header.lock));
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_llist_add_head(&cno_ptr->evd_list_head,
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            &evd_ptr->cno_list_entry, evd_ptr);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        /* Take a reference count on the CNO */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_atomic_inc(&(cno_ptr->cno_ref_count));
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_unlock(&cno_ptr->header.lock);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    /*
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * We need to enable the callback handler if the EVD has a CQ associated
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     * to it and is enabled.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor     */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    if ((evd_ptr->evd_flags & (DAT_EVD_DTO_FLAG | DAT_EVD_RMR_BIND_FLAG)) &&
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        evd_ptr->evd_enabled && cno_handle != DAT_HANDLE_NULL) {
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dat_status = DAPL_NOTIFY(evd_ptr)(
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor            evd_ptr->ib_cq_handle, IB_NOTIFY_ON_NEXT_COMP, 0);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        /* FIXME report error */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor        dapl_os_assert(dat_status == DAT_SUCCESS);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    }
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylorbail:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor    return (dat_status);
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor}