db/cntbt.c

   1 /*
   2  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include <libxfs.h>
  34 #include "data.h"
  35 #include "type.h"
  36 #include "faddr.h"
  37 #include "fprint.h"
  38 #include "field.h"
  39 #include "cntbt.h"
  40 #include "print.h"
  41 #include "bit.h"
  42 #include "mount.h"
  43
  44 static int      cntbt_key_count(void *obj, int startoff);
  45 static int      cntbt_key_offset(void *obj, int startoff, int idx);
  46 static int      cntbt_ptr_count(void *obj, int startoff);
  47 static int      cntbt_ptr_offset(void *obj, int startoff, int idx);
  48 static int      cntbt_rec_count(void *obj, int startoff);
  49 static int      cntbt_rec_offset(void *obj, int startoff, int idx);
  50
  51 const field_t   cntbt_hfld[] = {
  52         { "", FLDT_CNTBT, OI(0), C1, 0, TYP_NONE },
  53         { NULL }
  54 };
  55
  56 #define OFF(f)  bitize(offsetof(xfs_alloc_block_t, bb_ ## f))
  57 const field_t   cntbt_flds[] = {
  58         { "magic", FLDT_UINT32X, OI(OFF(magic)), C1, 0, TYP_NONE },
  59         { "level", FLDT_UINT16D, OI(OFF(level)), C1, 0, TYP_NONE },
  60         { "numrecs", FLDT_UINT16D, OI(OFF(numrecs)), C1, 0, TYP_NONE },
  61         { "leftsib", FLDT_AGBLOCK, OI(OFF(leftsib)), C1, 0, TYP_CNTBT },
  62         { "rightsib", FLDT_AGBLOCK, OI(OFF(rightsib)), C1, 0, TYP_CNTBT },
  63         { "recs", FLDT_CNTBTREC, cntbt_rec_offset, cntbt_rec_count,
  64           FLD_ARRAY|FLD_ABASE1|FLD_COUNT|FLD_OFFSET, TYP_NONE },
  65         { "keys", FLDT_CNTBTKEY, cntbt_key_offset, cntbt_key_count,
  66           FLD_ARRAY|FLD_ABASE1|FLD_COUNT|FLD_OFFSET, TYP_NONE },
  67         { "ptrs", FLDT_CNTBTPTR, cntbt_ptr_offset, cntbt_ptr_count,
  68           FLD_ARRAY|FLD_ABASE1|FLD_COUNT|FLD_OFFSET, TYP_CNTBT },
  69         { NULL }
  70 };
  71
  72 #define KOFF(f) bitize(offsetof(xfs_alloc_key_t, ar_ ## f))
  73 const field_t   cntbt_key_flds[] = {
  74         { "blockcount", FLDT_EXTLEN, OI(KOFF(blockcount)), C1, 0, TYP_NONE },
  75         { "startblock", FLDT_AGBLOCK, OI(KOFF(startblock)), C1, 0, TYP_DATA },
  76         { NULL }
  77 };
  78
  79 #define ROFF(f) bitize(offsetof(xfs_alloc_rec_t, ar_ ## f))
  80 const field_t   cntbt_rec_flds[] = {
  81         { "startblock", FLDT_AGBLOCK, OI(ROFF(startblock)), C1, 0, TYP_DATA },
  82         { "blockcount", FLDT_EXTLEN, OI(ROFF(blockcount)), C1, 0, TYP_NONE },
  83         { NULL }
  84 };
  85
  86 /*ARGSUSED*/
  87 static int
  88 cntbt_key_count(
  89         void                    *obj,
  90         int                     startoff)
  91 {
  92         xfs_alloc_block_t       *block;
  93
  94         ASSERT(startoff == 0);
  95         block = obj;
  96         if (INT_GET(block->bb_level, ARCH_CONVERT) == 0)
  97                 return 0;
  98         return INT_GET(block->bb_numrecs, ARCH_CONVERT);
  99 }
 100
 101 /*ARGSUSED*/
 102 static int
 103 cntbt_key_offset(
 104         void                    *obj,
 105         int                     startoff,
 106         int                     idx)
 107 {
 108         xfs_alloc_block_t       *block;
 109         xfs_alloc_key_t         *kp;
 110
 111         ASSERT(startoff == 0);
 112         block = obj;
 113         ASSERT(INT_GET(block->bb_level, ARCH_CONVERT) > 0);
 114         kp = XFS_BTREE_KEY_ADDR(mp->m_sb.sb_blocksize, xfs_alloc, block, idx,
 115                 XFS_BTREE_BLOCK_MAXRECS(mp->m_sb.sb_blocksize, xfs_alloc, 0));
 116         return bitize((int)((char *)kp - (char *)block));
 117 }
 118
 119 /*ARGSUSED*/
 120 static int
 121 cntbt_ptr_count(
 122         void                    *obj,
 123         int                     startoff)
 124 {
 125         xfs_alloc_block_t       *block;
 126
 127         ASSERT(startoff == 0);
 128         block = obj;
 129         if (INT_GET(block->bb_level, ARCH_CONVERT) == 0)
 130                 return 0;
 131         return INT_GET(block->bb_numrecs, ARCH_CONVERT);
 132 }
 133
 134 /*ARGSUSED*/
 135 static int
 136 cntbt_ptr_offset(
 137         void                    *obj,
 138         int                     startoff,
 139         int                     idx)
 140 {
 141         xfs_alloc_block_t       *block;
 142         xfs_alloc_ptr_t         *pp;
 143
 144         ASSERT(startoff == 0);
 145         block = obj;
 146         ASSERT(INT_GET(block->bb_level, ARCH_CONVERT) > 0);
 147         pp = XFS_BTREE_PTR_ADDR(mp->m_sb.sb_blocksize, xfs_alloc, block, idx,
 148                 XFS_BTREE_BLOCK_MAXRECS(mp->m_sb.sb_blocksize, xfs_alloc, 0));
 149         return bitize((int)((char *)pp - (char *)block));
 150 }
 151
 152 /*ARGSUSED*/
 153 static int
 154 cntbt_rec_count(
 155         void                    *obj,
 156         int                     startoff)
 157 {
 158         xfs_alloc_block_t       *block;
 159
 160         ASSERT(startoff == 0);
 161         block = obj;
 162         if (INT_GET(block->bb_level, ARCH_CONVERT) > 0)
 163                 return 0;
 164         return INT_GET(block->bb_numrecs, ARCH_CONVERT);
 165 }
 166
 167 /*ARGSUSED*/
 168 static int
 169 cntbt_rec_offset(
 170         void                    *obj,
 171         int                     startoff,
 172         int                     idx)
 173 {
 174         xfs_alloc_block_t       *block;
 175         xfs_alloc_rec_t         *rp;
 176
 177         ASSERT(startoff == 0);
 178         block = obj;
 179         ASSERT(INT_GET(block->bb_level, ARCH_CONVERT) == 0);
 180         rp = XFS_BTREE_REC_ADDR(mp->m_sb.sb_blocksize, xfs_alloc, block, idx,
 181                 XFS_BTREE_BLOCK_MAXRECS(mp->m_sb.sb_blocksize, xfs_alloc, 1));
 182         return bitize((int)((char *)rp - (char *)block));
 183 }
 184
 185 /*ARGSUSED*/
 186 int
 187 cntbt_size(
 188         void    *obj,
 189         int     startoff,
 190         int     idx)
 191 {
 192         return bitize(mp->m_sb.sb_blocksize);
 193 }