usr/src/uts/common/sys/mdesc.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 (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 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _MDESC_H_
  28 #define _MDESC_H_
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/types.h>
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38
  39 /*
  40  * Each logical domain is detailed via a (Virtual) Machine Description
  41  * available to each guest Operating System courtesy of a
  42  * Hypervisor service.
  43  */
  44
  45
  46
  47 #ifdef  _ASM
  48 #define U8(_s)  _s
  49 #define U16(_s) _s
  50 #define U32(_s) _s
  51 #define U64(_s) _s
  52 #else
  53 #define U8(_s)  ((uint8_t)(_s))
  54 #define U16(_s) ((uint16_t)(_s))
  55 #define U32(_s) ((uint32_t)(_s))
  56 #define U64(_s) ((uint64_t)(_s))
  57 #endif
  58
  59
  60
  61
  62
  63         /* the version this library understands */
  64
  65 #define MD_HEADER_VERS_OFF      0x0
  66 #define MD_HEADER_NODE_OFF      0x4
  67 #define MD_HEADER_NAME_OFF      0x8
  68 #define MD_HEADER_DATA_OFF      0xc
  69
  70 #define MD_HEADER_SIZE  0x10
  71
  72 #define MD_TRANSPORT_VERSION    U32(0x10000)
  73
  74 #define MD_ELEMENT_SIZE 0x10
  75
  76 #define MDE_ILLEGAL_IDX         U64(-1)
  77
  78 #define MDET_LIST_END   U8(0x0)
  79 #define MDET_NULL       U8(' ')
  80 #define MDET_NODE       U8('N')
  81 #define MDET_NODE_END   U8('E')
  82 #define MDET_PROP_ARC   U8('a')
  83 #define MDET_PROP_VAL   U8('v')
  84 #define MDET_PROP_STR   U8('s')
  85 #define MDET_PROP_DAT   U8('d')
  86
  87
  88 #ifndef _ASM    /* { */
  89
  90 /*
  91  * Opaque handles for use in external interfaces
  92  */
  93
  94 typedef void                    *md_t;
  95
  96 typedef uint64_t                mde_cookie_t;
  97 #define MDE_INVAL_ELEM_COOKIE   ((mde_cookie_t)-1)
  98
  99 typedef uint32_t                mde_str_cookie_t;
 100 #define MDE_INVAL_STR_COOKIE    ((mde_str_cookie_t)-1)
 101
 102 typedef uint64_t                md_diff_cookie_t;
 103 #define MD_INVAL_DIFF_COOKIE    ((md_diff_cookie_t)-1)
 104
 105 #define MDESC_INVAL_GEN         (0)
 106
 107 /*
 108  * External structure for MD diff interface
 109  */
 110 typedef struct {
 111         uint8_t         type;           /* property type */
 112         char            *namep;         /* property name */
 113 } md_prop_match_t;
 114
 115
 116 /*
 117  * Walk callback function return codes
 118  */
 119 #define MDE_WALK_ERROR  -1      /* Terminate walk with error */
 120 #define MDE_WALK_NEXT   0       /* Continue to next node */
 121 #define MDE_WALK_DONE   1       /* Terminate walk with success */
 122
 123 /*
 124  * The function prototype for a walker callback function.
 125  * The machine description session, parent node, current node,
 126  * and private data are given to the callback.
 127  *
 128  * The parent node is given to the callback to provide context
 129  * on how the walker arrived at this location.  While the node
 130  * may have many parents, it will be visited only once, this
 131  * provides context on how the walker arrived at the node.
 132  *
 133  * Input                Description
 134  * -------------------  ----------------------------------------
 135  * md_t *               Pointer to md session
 136  * mde_cookie_t         Index of parent node to provide context
 137  * mde_cookie_t         The current node in the walk
 138  * void *               Private data for the walking function
 139  */
 140 typedef int md_walk_fn_t(md_t *, mde_cookie_t, mde_cookie_t, void *);
 141
 142
 143 /*
 144  * External Interface
 145  */
 146
 147 extern md_t             *md_init_intern(uint64_t *,
 148                                 void *(*allocp)(size_t),
 149                                 void (*freep)(void *, size_t));
 150
 151 extern int              md_fini(md_t *);
 152
 153 extern int              md_node_count(md_t *);
 154
 155 extern mde_str_cookie_t md_find_name(md_t *, char *namep);
 156
 157 extern mde_cookie_t     md_root_node(md_t *);
 158
 159 extern uint64_t         md_get_gen(md_t *);
 160
 161 extern size_t           md_get_bin_size(md_t *);
 162
 163 extern int              md_scan_dag(md_t *,
 164                                 mde_cookie_t,
 165                                 mde_str_cookie_t,
 166                                 mde_str_cookie_t,
 167                                 mde_cookie_t *);
 168
 169 extern int              md_walk_dag(md_t *,
 170                                 mde_cookie_t,
 171                                 mde_str_cookie_t,
 172                                 mde_str_cookie_t,
 173                                 md_walk_fn_t,
 174                                 void *);
 175
 176 extern int              md_get_prop_val(md_t *,
 177                                 mde_cookie_t,
 178                                 char *,
 179                                 uint64_t *);
 180
 181 extern int              md_get_prop_str(md_t *,
 182                                 mde_cookie_t,
 183                                 char *,
 184                                 char **);
 185
 186 extern int              md_get_prop_data(md_t *,
 187                                 mde_cookie_t,
 188                                 char *,
 189                                 uint8_t **,
 190                                 int *);
 191
 192 extern int              md_get_prop_arcs(md_t *,
 193                                 mde_cookie_t,
 194                                 char *,
 195                                 mde_cookie_t *,
 196                                 size_t);
 197
 198
 199 extern md_diff_cookie_t md_diff_init(md_t *,
 200                                 mde_cookie_t,
 201                                 md_t *,
 202                                 mde_cookie_t,
 203                                 char *,
 204                                 md_prop_match_t *);
 205
 206 extern int              md_diff_added(md_diff_cookie_t,
 207                                 mde_cookie_t **);
 208
 209 extern int              md_diff_removed(md_diff_cookie_t,
 210                                 mde_cookie_t **);
 211
 212 extern int              md_diff_matched(md_diff_cookie_t,
 213                                 mde_cookie_t **,
 214                                 mde_cookie_t **);
 215
 216 extern int              md_diff_fini(md_diff_cookie_t);
 217
 218
 219 #endif  /* } _ASM */
 220
 221
 222
 223 /*
 224  * ioctl info for mdesc device
 225  */
 226
 227 #define MDESCIOC        ('m' << 24 | 'd' << 16 | 'd' << 8)
 228
 229 #define MDESCIOCGSZ     (MDESCIOC | 1)   /* Get quote buffer size */
 230 #define MDESCIOCSSZ     (MDESCIOC | 2)   /* Set new quote buffer size */
 231 #define MDESCIOCDISCARD (MDESCIOC | 3)   /* Discard quotes and reset */
 232
 233 #ifdef __cplusplus
 234 }
 235 #endif
 236
 237 #endif  /* _MDESC_H_ */