nvpair_impl.h revision 339146 
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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*
28 * Copyright (c) 2017 by Delphix. All rights reserved.
29 */
30
31#ifndef	_NVPAIR_IMPL_H
32#define	_NVPAIR_IMPL_H
33
34#ifdef __cplusplus
35extern "C" {
36#endif
37
38#include <sys/nvpair.h>
39
40/*
41 * The structures here provided for information and debugging purposes only
42 * may be changed in the future.
43 */
44
45/*
46 * implementation linked list for pre-packed data
47 */
48typedef struct i_nvp i_nvp_t;
49
50struct i_nvp {
51	union {
52		/* ensure alignment */
53		uint64_t	_nvi_align;
54
55		struct {
56			/* pointer to next nvpair */
57			i_nvp_t	*_nvi_next;
58
59			/* pointer to prev nvpair */
60			i_nvp_t	*_nvi_prev;
61
62			/* next pair in table bucket */
63			i_nvp_t	*_nvi_hashtable_next;
64		} _nvi;
65	} _nvi_un;
66
67	/* nvpair */
68	nvpair_t nvi_nvp;
69};
70#define	nvi_next	_nvi_un._nvi._nvi_next
71#define	nvi_prev	_nvi_un._nvi._nvi_prev
72#define	nvi_hashtable_next	_nvi_un._nvi._nvi_hashtable_next
73
74typedef struct {
75	i_nvp_t		*nvp_list;	/* linked list of nvpairs */
76	i_nvp_t		*nvp_last;	/* last nvpair */
77	i_nvp_t		*nvp_curr;	/* current walker nvpair */
78	nv_alloc_t	*nvp_nva;	/* pluggable allocator */
79	uint32_t	nvp_stat;	/* internal state */
80
81	i_nvp_t		**nvp_hashtable; /* table of entries used for lookup */
82	uint32_t	nvp_nbuckets;	/* # of buckets in hash table */
83	uint32_t	nvp_nentries;	/* # of entries in hash table */
84} nvpriv_t;
85
86#ifdef	__cplusplus
87}
88#endif
89
90#endif	/* _NVPAIR_IMPL_H */
91