db/dir2sf.c

   1 /*
   2  * Copyright (c) 2000-2001 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 "type.h"
  35 #include "faddr.h"
  36 #include "fprint.h"
  37 #include "field.h"
  38 #include "bit.h"
  39 #include "dir2sf.h"
  40
  41 static int      dir2_inou_i4_count(void *obj, int startoff);
  42 static int      dir2_inou_i8_count(void *obj, int startoff);
  43 static int      dir2_sf_entry_inumber_offset(void *obj, int startoff, int idx);
  44 static int      dir2_sf_entry_name_count(void *obj, int startoff);
  45 static int      dir2_sf_list_count(void *obj, int startoff);
  46 static int      dir2_sf_list_offset(void *obj, int startoff, int idx);
  47
  48 #define OFF(f)  bitize(offsetof(xfs_dir2_sf_t, f))
  49 const field_t   dir2sf_flds[] = {
  50         { "hdr", FLDT_DIR2_SF_HDR, OI(OFF(hdr)), C1, 0, TYP_NONE },
  51         { "list", FLDT_DIR2_SF_ENTRY, dir2_sf_list_offset, dir2_sf_list_count,
  52           FLD_ARRAY|FLD_COUNT|FLD_OFFSET, TYP_NONE },
  53         { NULL }
  54 };
  55
  56 #define UOFF(f) bitize(offsetof(xfs_dir2_inou_t, f))
  57 const field_t   dir2_inou_flds[] = {
  58         { "i8", FLDT_DIR2_INO8, OI(UOFF(i8)), dir2_inou_i8_count, FLD_COUNT,
  59           TYP_INODE },
  60         { "i4", FLDT_DIR2_INO4, OI(UOFF(i4)), dir2_inou_i4_count, FLD_COUNT,
  61           TYP_INODE },
  62         { NULL }
  63 };
  64
  65 #define HOFF(f) bitize(offsetof(xfs_dir2_sf_hdr_t, f))
  66 const field_t   dir2_sf_hdr_flds[] = {
  67         { "count", FLDT_UINT8D, OI(HOFF(count)), C1, 0, TYP_NONE },
  68         { "i8count", FLDT_UINT8D, OI(HOFF(i8count)), C1, 0, TYP_NONE },
  69         { "parent", FLDT_DIR2_INOU, OI(HOFF(parent)), C1, 0, TYP_NONE },
  70         { NULL }
  71 };
  72
  73 #define EOFF(f) bitize(offsetof(xfs_dir2_sf_entry_t, f))
  74 const field_t   dir2_sf_entry_flds[] = {
  75         { "namelen", FLDT_UINT8D, OI(EOFF(namelen)), C1, 0, TYP_NONE },
  76         { "offset", FLDT_DIR2_SF_OFF, OI(EOFF(offset)), C1, 0, TYP_NONE },
  77         { "name", FLDT_CHARNS, OI(EOFF(name)), dir2_sf_entry_name_count,
  78           FLD_COUNT, TYP_NONE },
  79         { "inumber", FLDT_DIR2_INOU, dir2_sf_entry_inumber_offset, C1,
  80           FLD_OFFSET, TYP_NONE },
  81         { NULL }
  82 };
  83
  84 /*ARGSUSED*/
  85 static int
  86 dir2_inou_i4_count(
  87         void            *obj,
  88         int             startoff)
  89 {
  90         xfs_dir2_sf_t   *sf;
  91
  92         ASSERT(bitoffs(startoff) == 0);
  93         sf = &((xfs_dinode_t *)obj)->di_u.di_dir2sf;
  94         return sf->hdr.i8count == 0;
  95 }
  96
  97 /*ARGSUSED*/
  98 static int
  99 dir2_inou_i8_count(
 100         void            *obj,
 101         int             startoff)
 102 {
 103         xfs_dir2_sf_t   *sf;
 104
 105         ASSERT(bitoffs(startoff) == 0);
 106         sf = &((xfs_dinode_t *)obj)->di_u.di_dir2sf;
 107         return sf->hdr.i8count != 0;
 108 }
 109
 110 /*ARGSUSED*/
 111 int
 112 dir2_inou_size(
 113         void            *obj,
 114         int             startoff,
 115         int             idx)
 116 {
 117         xfs_dir2_sf_t   *sf;
 118
 119         ASSERT(bitoffs(startoff) == 0);
 120         ASSERT(idx == 0);
 121         sf = &((xfs_dinode_t *)obj)->di_u.di_dir2sf;
 122         return bitize(sf->hdr.i8count ?
 123                       (uint)sizeof(xfs_dir2_ino8_t) :
 124                       (uint)sizeof(xfs_dir2_ino4_t));
 125 }
 126
 127 static int
 128 dir2_sf_entry_name_count(
 129         void                    *obj,
 130         int                     startoff)
 131 {
 132         xfs_dir2_sf_entry_t     *e;
 133
 134         ASSERT(bitoffs(startoff) == 0);
 135         e = (xfs_dir2_sf_entry_t *)((char *)obj + byteize(startoff));
 136         return e->namelen;
 137 }
 138
 139 /*ARGSUSED*/
 140 static int
 141 dir2_sf_entry_inumber_offset(
 142         void                    *obj,
 143         int                     startoff,
 144         int                     idx)
 145 {
 146         xfs_dir2_sf_entry_t     *e;
 147
 148         ASSERT(bitoffs(startoff) == 0);
 149         ASSERT(idx == 0);
 150         e = (xfs_dir2_sf_entry_t *)((char *)obj + byteize(startoff));
 151         return bitize((int)((char *)XFS_DIR2_SF_INUMBERP(e) - (char *)e));
 152 }
 153
 154 int
 155 dir2_sf_entry_size(
 156         void                    *obj,
 157         int                     startoff,
 158         int                     idx)
 159 {
 160         xfs_dir2_sf_entry_t     *e;
 161         int                     i;
 162         xfs_dir2_sf_t           *sf;
 163
 164         ASSERT(bitoffs(startoff) == 0);
 165         sf = (xfs_dir2_sf_t *)((char *)obj + byteize(startoff));
 166         e = XFS_DIR2_SF_FIRSTENTRY(sf);
 167         for (i = 0; i < idx; i++)
 168                 e = XFS_DIR2_SF_NEXTENTRY(sf, e);
 169         return bitize((int)XFS_DIR2_SF_ENTSIZE_BYENTRY(sf, e));
 170 }
 171
 172 /*ARGSUSED*/
 173 int
 174 dir2_sf_hdr_size(
 175         void            *obj,
 176         int             startoff,
 177         int             idx)
 178 {
 179         xfs_dir2_sf_t   *sf;
 180
 181         ASSERT(bitoffs(startoff) == 0);
 182         ASSERT(idx == 0);
 183         sf = (xfs_dir2_sf_t *)((char *)obj + byteize(startoff));
 184         return bitize(XFS_DIR2_SF_HDR_SIZE(sf->hdr.i8count));
 185 }
 186
 187 static int
 188 dir2_sf_list_count(
 189         void                    *obj,
 190         int                     startoff)
 191 {
 192         xfs_dir2_sf_t           *sf;
 193
 194         ASSERT(bitoffs(startoff) == 0);
 195         sf = (xfs_dir2_sf_t *)((char *)obj + byteize(startoff));
 196         return sf->hdr.count;
 197 }
 198
 199 static int
 200 dir2_sf_list_offset(
 201         void                    *obj,
 202         int                     startoff,
 203         int                     idx)
 204 {
 205         xfs_dir2_sf_entry_t     *e;
 206         int                     i;
 207         xfs_dir2_sf_t           *sf;
 208
 209         ASSERT(bitoffs(startoff) == 0);
 210         sf = (xfs_dir2_sf_t *)((char *)obj + byteize(startoff));
 211         e = XFS_DIR2_SF_FIRSTENTRY(sf);
 212         for (i = 0; i < idx; i++)
 213                 e = XFS_DIR2_SF_NEXTENTRY(sf, e);
 214         return bitize((int)((char *)e - (char *)sf));
 215 }
 216
 217 /*ARGSUSED*/
 218 int
 219 dir2sf_size(
 220         void                    *obj,
 221         int                     startoff,
 222         int                     idx)
 223 {
 224         xfs_dir2_sf_entry_t     *e;
 225         int                     i;
 226         xfs_dir2_sf_t           *sf;
 227
 228         ASSERT(bitoffs(startoff) == 0);
 229         ASSERT(idx == 0);
 230         sf = (xfs_dir2_sf_t *)((char *)obj + byteize(startoff));
 231         e = XFS_DIR2_SF_FIRSTENTRY(sf);
 232         for (i = 0; i < sf->hdr.count; i++)
 233                 e = XFS_DIR2_SF_NEXTENTRY(sf, e);
 234         return bitize((int)((char *)e - (char *)sf));
 235 }