sys/ufs/ext2fs/ext2fs_bswap.c

   1 /*      $NetBSD: ext2fs_bswap.c,v 1.19 2013/01/22 09:39:15 dholland Exp $       */
   2
   3 /*
   4  * Copyright (c) 1997 Manuel Bouyer.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  */
  27
  28 #include <sys/cdefs.h>
  29 __KERNEL_RCSID(0, "$NetBSD: ext2fs_bswap.c,v 1.19 2013/01/22 09:39:15 dholland Exp $");
  30
  31 #include <sys/types.h>
  32 #include <ufs/ext2fs/ext2fs.h>
  33 #include <ufs/ext2fs/ext2fs_dinode.h>
  34
  35 #if defined(_KERNEL)
  36 #include <sys/systm.h>
  37 #else
  38 #include <string.h>
  39 #endif
  40
  41 /* These functions are only needed if native byte order is not little endian */
  42 #if BYTE_ORDER == BIG_ENDIAN
  43 void
  44 e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new)
  45 {
  46
  47         /* preserve unused fields */
  48         memcpy(new, old, sizeof(struct ext2fs));
  49         new->e2fs_icount        =       bswap32(old->e2fs_icount);
  50         new->e2fs_bcount        =       bswap32(old->e2fs_bcount);
  51         new->e2fs_rbcount       =       bswap32(old->e2fs_rbcount);
  52         new->e2fs_fbcount       =       bswap32(old->e2fs_fbcount);
  53         new->e2fs_ficount       =       bswap32(old->e2fs_ficount);
  54         new->e2fs_first_dblock  =       bswap32(old->e2fs_first_dblock);
  55         new->e2fs_log_bsize     =       bswap32(old->e2fs_log_bsize);
  56         new->e2fs_fsize         =       bswap32(old->e2fs_fsize);
  57         new->e2fs_bpg           =       bswap32(old->e2fs_bpg);
  58         new->e2fs_fpg           =       bswap32(old->e2fs_fpg);
  59         new->e2fs_ipg           =       bswap32(old->e2fs_ipg);
  60         new->e2fs_mtime         =       bswap32(old->e2fs_mtime);
  61         new->e2fs_wtime         =       bswap32(old->e2fs_wtime);
  62         new->e2fs_mnt_count     =       bswap16(old->e2fs_mnt_count);
  63         new->e2fs_max_mnt_count =       bswap16(old->e2fs_max_mnt_count);
  64         new->e2fs_magic         =       bswap16(old->e2fs_magic);
  65         new->e2fs_state         =       bswap16(old->e2fs_state);
  66         new->e2fs_beh           =       bswap16(old->e2fs_beh);
  67         new->e2fs_minrev        =       bswap16(old->e2fs_minrev);
  68         new->e2fs_lastfsck      =       bswap32(old->e2fs_lastfsck);
  69         new->e2fs_fsckintv      =       bswap32(old->e2fs_fsckintv);
  70         new->e2fs_creator       =       bswap32(old->e2fs_creator);
  71         new->e2fs_rev           =       bswap32(old->e2fs_rev);
  72         new->e2fs_ruid          =       bswap16(old->e2fs_ruid);
  73         new->e2fs_rgid          =       bswap16(old->e2fs_rgid);
  74         new->e2fs_first_ino     =       bswap32(old->e2fs_first_ino);
  75         new->e2fs_inode_size    =       bswap16(old->e2fs_inode_size);
  76         new->e2fs_block_group_nr =      bswap16(old->e2fs_block_group_nr);
  77         new->e2fs_features_compat =     bswap32(old->e2fs_features_compat);
  78         new->e2fs_features_incompat =   bswap32(old->e2fs_features_incompat);
  79         new->e2fs_features_rocompat =   bswap32(old->e2fs_features_rocompat);
  80         new->e2fs_algo          =       bswap32(old->e2fs_algo);
  81         new->e2fs_reserved_ngdb =       bswap16(old->e2fs_reserved_ngdb);
  82 }
  83
  84 void e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size)
  85 {
  86         int i;
  87
  88         for (i = 0; i < (size / (int)sizeof(struct  ext2_gd)); i++) {
  89                 new[i].ext2bgd_b_bitmap = bswap32(old[i].ext2bgd_b_bitmap);
  90                 new[i].ext2bgd_i_bitmap = bswap32(old[i].ext2bgd_i_bitmap);
  91                 new[i].ext2bgd_i_tables = bswap32(old[i].ext2bgd_i_tables);
  92                 new[i].ext2bgd_nbfree   = bswap16(old[i].ext2bgd_nbfree);
  93                 new[i].ext2bgd_nifree   = bswap16(old[i].ext2bgd_nifree);
  94                 new[i].ext2bgd_ndirs    = bswap16(old[i].ext2bgd_ndirs);
  95         }
  96 }
  97
  98 void e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new)
  99 {
 100
 101         new->e2di_mode          =       bswap16(old->e2di_mode);
 102         new->e2di_uid           =       bswap16(old->e2di_uid);
 103         new->e2di_gid           =       bswap16(old->e2di_gid);
 104         new->e2di_nlink         =       bswap16(old->e2di_nlink);
 105         new->e2di_size          =       bswap32(old->e2di_size);
 106         new->e2di_atime         =       bswap32(old->e2di_atime);
 107         new->e2di_ctime         =       bswap32(old->e2di_ctime);
 108         new->e2di_mtime         =       bswap32(old->e2di_mtime);
 109         new->e2di_dtime         =       bswap32(old->e2di_dtime);
 110         new->e2di_nblock        =       bswap32(old->e2di_nblock);
 111         new->e2di_flags         =       bswap32(old->e2di_flags);
 112         new->e2di_version       =       bswap32(old->e2di_version);
 113         new->e2di_gen           =       bswap32(old->e2di_gen);
 114         new->e2di_facl          =       bswap32(old->e2di_facl);
 115         new->e2di_dacl          =       bswap32(old->e2di_dacl);
 116         new->e2di_faddr         =       bswap32(old->e2di_faddr);
 117         new->e2di_nblock_high   =       bswap16(old->e2di_nblock_high);
 118         new->e2di_facl_high     =       bswap16(old->e2di_facl_high);
 119         new->e2di_uid_high      =       bswap16(old->e2di_uid_high);
 120         new->e2di_gid_high      =       bswap16(old->e2di_gid_high);
 121         memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
 122             (EXT2FS_NDADDR + EXT2FS_NIADDR) * sizeof(uint32_t));
 123 }
 124 #endif