zfs/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 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 #ifndef _NVPAIR_IMPL_H
  28 #define _NVPAIR_IMPL_H
  29
  30
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 #include <sys/nvpair.h>
  37
  38 /*
  39  * The structures here provided for information and debugging purposes only
  40  * may be changed in the future.
  41  */
  42
  43 /*
  44  * implementation linked list for pre-packed data
  45  */
  46 typedef struct i_nvp i_nvp_t;
  47
  48 struct i_nvp {
  49         union {
  50                 uint64_t        _nvi_align;     /* ensure alignment */
  51                 struct {
  52                         i_nvp_t *_nvi_next;     /* pointer to next nvpair */
  53                         i_nvp_t *_nvi_prev;     /* pointer to prev nvpair */
  54                 } _nvi;
  55         } _nvi_un;
  56         nvpair_t nvi_nvp;                       /* nvpair */
  57 };
  58 #define nvi_next        _nvi_un._nvi._nvi_next
  59 #define nvi_prev        _nvi_un._nvi._nvi_prev
  60
  61 typedef struct {
  62         i_nvp_t         *nvp_list;      /* linked list of nvpairs */
  63         i_nvp_t         *nvp_last;      /* last nvpair */
  64         i_nvp_t         *nvp_curr;      /* current walker nvpair */
  65         nv_alloc_t      *nvp_nva;       /* pluggable allocator */
  66         uint32_t        nvp_stat;       /* internal state */
  67 } nvpriv_t;
  68
  69 #ifdef  __cplusplus
  70 }
  71 #endif
  72
  73 #endif  /* _NVPAIR_IMPL_H */