include/sys/nvpair_impl.h

   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 https://opensource.org/licenses/CDDL-1.0.
  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
  35 extern "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  */
  48 typedef struct i_nvp i_nvp_t;
  49
  50 struct 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
  74 typedef struct {
  75         i_nvp_t         *nvp_list;      /* linked list of nvpairs */
  76         i_nvp_t         *nvp_last;      /* last nvpair */
  77         const 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 */