1*9e39c5baSBill Taylor /*
2*9e39c5baSBill Taylor  * CDDL HEADER START
3*9e39c5baSBill Taylor  *
4*9e39c5baSBill Taylor  * The contents of this file are subject to the terms of the
5*9e39c5baSBill Taylor  * Common Development and Distribution License (the "License").
6*9e39c5baSBill Taylor  * You may not use this file except in compliance with the License.
7*9e39c5baSBill Taylor  *
8*9e39c5baSBill Taylor  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*9e39c5baSBill Taylor  * or http://www.opensolaris.org/os/licensing.
10*9e39c5baSBill Taylor  * See the License for the specific language governing permissions
11*9e39c5baSBill Taylor  * and limitations under the License.
12*9e39c5baSBill Taylor  *
13*9e39c5baSBill Taylor  * When distributing Covered Code, include this CDDL HEADER in each
14*9e39c5baSBill Taylor  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*9e39c5baSBill Taylor  * If applicable, add the following below this CDDL HEADER, with the
16*9e39c5baSBill Taylor  * fields enclosed by brackets "[]" replaced with your own identifying
17*9e39c5baSBill Taylor  * information: Portions Copyright [yyyy] [name of copyright owner]
18*9e39c5baSBill Taylor  *
19*9e39c5baSBill Taylor  * CDDL HEADER END
20*9e39c5baSBill Taylor  */
21*9e39c5baSBill Taylor 
22*9e39c5baSBill Taylor /*
23*9e39c5baSBill Taylor  * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
24*9e39c5baSBill Taylor  */
25*9e39c5baSBill Taylor 
26*9e39c5baSBill Taylor /*
27*9e39c5baSBill Taylor  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
28*9e39c5baSBill Taylor  * Use is subject to license terms.
29*9e39c5baSBill Taylor  */
30*9e39c5baSBill Taylor 
31*9e39c5baSBill Taylor /*
32*9e39c5baSBill Taylor  *
33*9e39c5baSBill Taylor  * MODULE: dapl_evd_modify_cno.c
34*9e39c5baSBill Taylor  *
35*9e39c5baSBill Taylor  * PURPOSE: Event Management
36*9e39c5baSBill Taylor  *
37*9e39c5baSBill Taylor  * Description: Interfaces in this file are completely described in
38*9e39c5baSBill Taylor  * 		the DAPL 1.1 API, Chapter 6, section 3
39*9e39c5baSBill Taylor  *
40*9e39c5baSBill Taylor  * $Id: dapl_evd_modify_cno.c,v 1.10 2003/07/14 17:50:32 sjs2 Exp $
41*9e39c5baSBill Taylor  */
42*9e39c5baSBill Taylor 
43*9e39c5baSBill Taylor #include "dapl.h"
44*9e39c5baSBill Taylor #include "dapl_adapter_util.h"
45*9e39c5baSBill Taylor 
46*9e39c5baSBill Taylor /*
47*9e39c5baSBill Taylor  * dapl_evd_modify_cno
48*9e39c5baSBill Taylor  *
49*9e39c5baSBill Taylor  * DAPL Requirements Version xxx, 6.3.2.4
50*9e39c5baSBill Taylor  *
51*9e39c5baSBill Taylor  * Modify the CNO associated with the EVD
52*9e39c5baSBill Taylor  *
53*9e39c5baSBill Taylor  * Input:
54*9e39c5baSBill Taylor  * 	evd_handle
55*9e39c5baSBill Taylor  * 	cno_handle
56*9e39c5baSBill Taylor  *
57*9e39c5baSBill Taylor  * Output:
58*9e39c5baSBill Taylor  * 	none
59*9e39c5baSBill Taylor  *
60*9e39c5baSBill Taylor  * Returns:
61*9e39c5baSBill Taylor  * 	DAT_SUCCSSS
62*9e39c5baSBill Taylor  * 	DAT_INVALID_HANDLE
63*9e39c5baSBill Taylor  */
64*9e39c5baSBill Taylor 
65*9e39c5baSBill Taylor DAT_RETURN
dapl_evd_modify_cno(IN DAT_EVD_HANDLE evd_handle,IN DAT_CNO_HANDLE cno_handle)66*9e39c5baSBill Taylor dapl_evd_modify_cno(
67*9e39c5baSBill Taylor 	IN	DAT_EVD_HANDLE		evd_handle,
68*9e39c5baSBill Taylor 	IN	DAT_CNO_HANDLE		cno_handle)
69*9e39c5baSBill Taylor {
70*9e39c5baSBill Taylor 	DAPL_EVD	*evd_ptr;
71*9e39c5baSBill Taylor 	DAPL_CNO	*cno_ptr;
72*9e39c5baSBill Taylor 	DAPL_CNO	*old_cno_ptr;
73*9e39c5baSBill Taylor 	DAT_RETURN	dat_status;
74*9e39c5baSBill Taylor 
75*9e39c5baSBill Taylor 	evd_ptr = (DAPL_EVD *)evd_handle;
76*9e39c5baSBill Taylor 	cno_ptr = (DAPL_CNO *)cno_handle;
77*9e39c5baSBill Taylor 	dat_status = DAT_SUCCESS;
78*9e39c5baSBill Taylor 
79*9e39c5baSBill Taylor 	if (DAPL_BAD_HANDLE(evd_handle, DAPL_MAGIC_EVD)) {
80*9e39c5baSBill Taylor 		dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 0);
81*9e39c5baSBill Taylor 		goto bail;
82*9e39c5baSBill Taylor 	}
83*9e39c5baSBill Taylor 
84*9e39c5baSBill Taylor 	/* cno_handle of DAT_HANDLE_NULL disassociated the EVD with any CNO */
85*9e39c5baSBill Taylor 	if ((cno_handle != DAT_HANDLE_NULL) &&
86*9e39c5baSBill Taylor 	    DAPL_BAD_HANDLE(cno_handle, DAPL_MAGIC_CNO)) {
87*9e39c5baSBill Taylor 		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
88*9e39c5baSBill Taylor 		    DAT_INVALID_HANDLE_CNO);
89*9e39c5baSBill Taylor 		goto bail;
90*9e39c5baSBill Taylor 	}
91*9e39c5baSBill Taylor 
92*9e39c5baSBill Taylor 	/* nothing to change */
93*9e39c5baSBill Taylor 	if (cno_ptr == evd_ptr->cno_ptr) {
94*9e39c5baSBill Taylor 		dat_status = DAT_SUCCESS;
95*9e39c5baSBill Taylor 		goto bail;
96*9e39c5baSBill Taylor 	}
97*9e39c5baSBill Taylor 
98*9e39c5baSBill Taylor 	if (dapls_ib_modify_cno(evd_ptr, cno_ptr) != DAT_SUCCESS) {
99*9e39c5baSBill Taylor 		dat_status = DAT_ERROR(DAT_INVALID_HANDLE, 0);
100*9e39c5baSBill Taylor 		goto bail;
101*9e39c5baSBill Taylor 	}
102*9e39c5baSBill Taylor 
103*9e39c5baSBill Taylor 	dapl_os_lock(&evd_ptr->header.lock);
104*9e39c5baSBill Taylor 	old_cno_ptr = evd_ptr->cno_ptr;
105*9e39c5baSBill Taylor 	evd_ptr->cno_ptr = cno_ptr;
106*9e39c5baSBill Taylor 	dapl_os_unlock(&evd_ptr->header.lock);
107*9e39c5baSBill Taylor 
108*9e39c5baSBill Taylor 	/*
109*9e39c5baSBill Taylor 	 * We need to first remove the evd from the old CNO's list before
110*9e39c5baSBill Taylor 	 * adding it to the new CNO's list
111*9e39c5baSBill Taylor 	 */
112*9e39c5baSBill Taylor 	if (old_cno_ptr) {
113*9e39c5baSBill Taylor 		dapl_os_lock(&(old_cno_ptr->header.lock));
114*9e39c5baSBill Taylor 		(void) dapl_llist_remove_entry(&old_cno_ptr->evd_list_head,
115*9e39c5baSBill Taylor 		    &evd_ptr->cno_list_entry);
116*9e39c5baSBill Taylor 		dapl_os_atomic_dec(&(old_cno_ptr->cno_ref_count));
117*9e39c5baSBill Taylor 		dapl_os_unlock(&(old_cno_ptr->header.lock));
118*9e39c5baSBill Taylor 
119*9e39c5baSBill Taylor 	}
120*9e39c5baSBill Taylor 
121*9e39c5baSBill Taylor 	if (cno_ptr) {
122*9e39c5baSBill Taylor 		dapl_os_lock(&(cno_ptr->header.lock));
123*9e39c5baSBill Taylor 		dapl_llist_add_head(&cno_ptr->evd_list_head,
124*9e39c5baSBill Taylor 		    &evd_ptr->cno_list_entry, evd_ptr);
125*9e39c5baSBill Taylor 		/* Take a reference count on the CNO */
126*9e39c5baSBill Taylor 		dapl_os_atomic_inc(&(cno_ptr->cno_ref_count));
127*9e39c5baSBill Taylor 		dapl_os_unlock(&cno_ptr->header.lock);
128*9e39c5baSBill Taylor 	}
129*9e39c5baSBill Taylor 
130*9e39c5baSBill Taylor 	/*
131*9e39c5baSBill Taylor 	 * We need to enable the callback handler if the EVD has a CQ associated
132*9e39c5baSBill Taylor 	 * to it and is enabled.
133*9e39c5baSBill Taylor 	 */
134*9e39c5baSBill Taylor 	if ((evd_ptr->evd_flags & (DAT_EVD_DTO_FLAG | DAT_EVD_RMR_BIND_FLAG)) &&
135*9e39c5baSBill Taylor 	    evd_ptr->evd_enabled && cno_handle != DAT_HANDLE_NULL) {
136*9e39c5baSBill Taylor 		dat_status = DAPL_NOTIFY(evd_ptr)(
137*9e39c5baSBill Taylor 		    evd_ptr->ib_cq_handle, IB_NOTIFY_ON_NEXT_COMP, 0);
138*9e39c5baSBill Taylor 
139*9e39c5baSBill Taylor 		/* FIXME report error */
140*9e39c5baSBill Taylor 		dapl_os_assert(dat_status == DAT_SUCCESS);
141*9e39c5baSBill Taylor 	}
142*9e39c5baSBill Taylor 
143*9e39c5baSBill Taylor bail:
144*9e39c5baSBill Taylor 	return (dat_status);
145*9e39c5baSBill Taylor }
146