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 2004 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 /*
32 *
33 * MODULE: dapl_cno_util.c
34 *
35 * PURPOSE: Manage CNO Info structure
36 *
37 * $Id: dapl_cno_util.c,v 1.6 2003/06/13 12:21:02 sjs2 Exp $
38 */
39
40 #include "dapl_ia_util.h"
41 #include "dapl_cno_util.h"
42 #include "dapl_adapter_util.h"
43
44
45
46 /*
47 * dapl_cno_alloc
48 *
49 * alloc and initialize an EVD struct
50 *
51 * Input:
52 * ia
53 *
54 * Returns:
55 * cno_ptr, or null on failure.
56 */
57 DAPL_CNO *
dapl_cno_alloc(IN DAPL_IA * ia_ptr,IN DAT_OS_WAIT_PROXY_AGENT wait_agent)58 dapl_cno_alloc(
59 IN DAPL_IA *ia_ptr,
60 IN DAT_OS_WAIT_PROXY_AGENT wait_agent)
61 {
62 DAPL_CNO *cno_ptr;
63
64 cno_ptr = (DAPL_CNO *) dapl_os_alloc(sizeof (DAPL_CNO));
65 if (!cno_ptr) {
66 return (NULL);
67 }
68
69 /* zero the structure */
70 (void) dapl_os_memzero(cno_ptr, sizeof (DAPL_CNO));
71
72 /*
73 * Initialize the header.
74 */
75 cno_ptr->header.provider = ia_ptr->header.provider;
76 cno_ptr->header.magic = DAPL_MAGIC_CNO;
77 cno_ptr->header.handle_type = DAT_HANDLE_TYPE_CNO;
78 cno_ptr->header.owner_ia = ia_ptr;
79 cno_ptr->header.user_context.as_64 = 0;
80 cno_ptr->header.user_context.as_ptr = NULL;
81 dapl_llist_init_entry(&cno_ptr->header.ia_list_entry);
82 dapl_llist_init_head(&cno_ptr->evd_list_head);
83 dapl_os_lock_init(&cno_ptr->header.lock);
84
85 /*
86 * Initialize the body
87 */
88 cno_ptr->cno_waiters = 0;
89 cno_ptr->cno_ref_count = 0;
90 cno_ptr->cno_state = DAPL_CNO_STATE_UNTRIGGERED;
91 cno_ptr->cno_evd_triggered = NULL;
92 cno_ptr->cno_wait_agent = wait_agent;
93 (void) dapl_os_wait_object_init(&cno_ptr->cno_wait_object);
94
95 return (cno_ptr);
96 }
97
98 /*
99 * dapl_cno_dealloc
100 *
101 * Free the passed in CNO structure.
102 *
103 * Input:
104 * cno_ptr
105 *
106 * Output:
107 * none
108 *
109 * Returns:
110 * none
111 *
112 */
113 void
dapl_cno_dealloc(IN DAPL_CNO * cno_ptr)114 dapl_cno_dealloc(
115 IN DAPL_CNO *cno_ptr)
116 {
117 dapl_os_assert(cno_ptr->header.magic == DAPL_MAGIC_CNO);
118 dapl_os_assert(cno_ptr->cno_ref_count == 0);
119
120 /*
121 * deinitialize the header
122 */
123 /* reset magic to prevent reuse */
124 cno_ptr->header.magic = DAPL_MAGIC_INVALID;
125
126 (void) dapl_os_wait_object_destroy(&cno_ptr->cno_wait_object);
127 dapl_os_free(cno_ptr, sizeof (DAPL_CNO));
128 }
129
130 /*
131 * dapl_cno_trigger
132 *
133 * DAPL Internal routine to trigger the specified CNO.
134 * Called by the callback of some EVD associated with the CNO.
135 *
136 * Input:
137 * cno_ptr
138 * evd_ptr EVD triggering
139 *
140 * Output:
141 * None
142 *
143 * Returns:
144 * None
145 */
146 void
dapl_cno_trigger(IN DAPL_CNO * cno_ptr,IN DAPL_EVD * evd_ptr)147 dapl_cno_trigger(
148 IN DAPL_CNO *cno_ptr,
149 IN DAPL_EVD *evd_ptr) /* ARGSUSED */
150 {
151 /*
152 * In Solaris uDAPL the CNO is triggered in the kernel
153 */
154 }
155