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