dapl_evd_modify_cno.c revision 9e39c5ba00a55fa05777cc94b148296af305e135
/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
*
* MODULE: dapl_evd_modify_cno.c
*
* PURPOSE: Event Management
*
* Description: Interfaces in this file are completely described in
* the DAPL 1.1 API, Chapter 6, section 3
*
* $Id: dapl_evd_modify_cno.c,v 1.10 2003/07/14 17:50:32 sjs2 Exp $
*/
#include "dapl.h"
#include "dapl_adapter_util.h"
/*
* dapl_evd_modify_cno
*
* DAPL Requirements Version xxx, 6.3.2.4
*
* Modify the CNO associated with the EVD
*
* Input:
* evd_handle
* cno_handle
*
* Output:
* none
*
* Returns:
* DAT_SUCCSSS
* DAT_INVALID_HANDLE
*/
DAT_RETURN
dapl_evd_modify_cno(
IN DAT_EVD_HANDLE evd_handle,
IN DAT_CNO_HANDLE cno_handle)
{
DAPL_EVD *evd_ptr;
DAPL_CNO *cno_ptr;
DAPL_CNO *old_cno_ptr;
DAT_RETURN dat_status;
evd_ptr = (DAPL_EVD *)evd_handle;
cno_ptr = (DAPL_CNO *)cno_handle;
dat_status = DAT_SUCCESS;
if (DAPL_BAD_HANDLE(evd_handle, DAPL_MAGIC_EVD)) {
dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 0);
goto bail;
}
/* cno_handle of DAT_HANDLE_NULL disassociated the EVD with any CNO */
if ((cno_handle != DAT_HANDLE_NULL) &&
DAPL_BAD_HANDLE(cno_handle, DAPL_MAGIC_CNO)) {
dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
DAT_INVALID_HANDLE_CNO);
goto bail;
}
/* nothing to change */
if (cno_ptr == evd_ptr->cno_ptr) {
dat_status = DAT_SUCCESS;
goto bail;
}
if (dapls_ib_modify_cno(evd_ptr, cno_ptr) != DAT_SUCCESS) {
dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 0);
goto bail;
}
dapl_os_lock(&evd_ptr->header.lock);
old_cno_ptr = evd_ptr->cno_ptr;
evd_ptr->cno_ptr = cno_ptr;
dapl_os_unlock(&evd_ptr->header.lock);
/*
* We need to first remove the evd from the old CNO's list before
* adding it to the new CNO's list
*/
if (old_cno_ptr) {
dapl_os_lock(&(old_cno_ptr->header.lock));
(void) dapl_llist_remove_entry(&old_cno_ptr->evd_list_head,
&evd_ptr->cno_list_entry);
dapl_os_atomic_dec(&(old_cno_ptr->cno_ref_count));
dapl_os_unlock(&(old_cno_ptr->header.lock));
}
if (cno_ptr) {
dapl_os_lock(&(cno_ptr->header.lock));
dapl_llist_add_head(&cno_ptr->evd_list_head,
&evd_ptr->cno_list_entry, evd_ptr);
/* Take a reference count on the CNO */
dapl_os_atomic_inc(&(cno_ptr->cno_ref_count));
dapl_os_unlock(&cno_ptr->header.lock);
}
/*
* We need to enable the callback handler if the EVD has a CQ associated
* to it and is enabled.
*/
if ((evd_ptr->evd_flags & (DAT_EVD_DTO_FLAG | DAT_EVD_RMR_BIND_FLAG)) &&
evd_ptr->evd_enabled && cno_handle != DAT_HANDLE_NULL) {
dat_status = DAPL_NOTIFY(evd_ptr)(
evd_ptr->ib_cq_handle, IB_NOTIFY_ON_NEXT_COMP, 0);
/* FIXME report error */
dapl_os_assert(dat_status == DAT_SUCCESS);
}
bail:
return (dat_status);
}