root/ufs/ext2fs/ext2fs_bswap.c

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DEFINITIONS

This source file includes following definitions.
  1. e2fs_sb_bswap
  2. e2fs_cg_bswap
  3. e2fs_i_bswap

    1 /*      $OpenBSD: ext2fs_bswap.c,v 1.4 2007/06/17 20:15:25 jasper Exp $ */
    2 /*      $NetBSD: ext2fs_bswap.c,v 1.6 2000/07/24 00:23:10 mycroft Exp $ */
    3 
    4 /*
    5  * Copyright (c) 1997 Manuel Bouyer.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by the University of
   18  *      California, Berkeley and its contributors.
   19  * 4. Neither the name of the University nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   33  *
   34  */
   35 
   36 #include <sys/types.h>
   37 #if defined(_KERNEL)
   38 #include <sys/systm.h>
   39 #endif
   40 #include <ufs/ext2fs/ext2fs.h>
   41 #include <ufs/ext2fs/ext2fs_dinode.h>
   42 
   43 #if !defined(_KERNEL)
   44 #include <string.h>
   45 #endif
   46 
   47 /* These functions are only needed if native byte order is not big endian */
   48 #if BYTE_ORDER == BIG_ENDIAN
   49 void
   50 e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new)
   51 {
   52         /* preserve unused fields */
   53         memcpy(new, old, sizeof(struct ext2fs));
   54         new->e2fs_icount        =       swap32(old->e2fs_icount);
   55         new->e2fs_bcount        =       swap32(old->e2fs_bcount);
   56         new->e2fs_rbcount       =       swap32(old->e2fs_rbcount);
   57         new->e2fs_fbcount       =       swap32(old->e2fs_fbcount);
   58         new->e2fs_ficount       =       swap32(old->e2fs_ficount);
   59         new->e2fs_first_dblock  =       swap32(old->e2fs_first_dblock);
   60         new->e2fs_log_bsize     =       swap32(old->e2fs_log_bsize);
   61         new->e2fs_fsize         =       swap32(old->e2fs_fsize);
   62         new->e2fs_bpg           =       swap32(old->e2fs_bpg);
   63         new->e2fs_fpg           =       swap32(old->e2fs_fpg);
   64         new->e2fs_ipg           =       swap32(old->e2fs_ipg);
   65         new->e2fs_mtime         =       swap32(old->e2fs_mtime);
   66         new->e2fs_wtime         =       swap32(old->e2fs_wtime);
   67         new->e2fs_mnt_count     =       swap16(old->e2fs_mnt_count);
   68         new->e2fs_max_mnt_count =       swap16(old->e2fs_max_mnt_count);
   69         new->e2fs_magic         =       swap16(old->e2fs_magic);
   70         new->e2fs_state         =       swap16(old->e2fs_state);
   71         new->e2fs_beh           =       swap16(old->e2fs_beh);
   72         new->e2fs_minrev        =       swap16(old->e2fs_minrev);
   73         new->e2fs_lastfsck      =       swap32(old->e2fs_lastfsck);
   74         new->e2fs_fsckintv      =       swap32(old->e2fs_fsckintv);
   75         new->e2fs_creator       =       swap32(old->e2fs_creator);
   76         new->e2fs_rev           =       swap32(old->e2fs_rev);
   77         new->e2fs_ruid          =       swap16(old->e2fs_ruid);
   78         new->e2fs_rgid          =       swap16(old->e2fs_rgid);
   79         new->e2fs_first_ino     =       swap32(old->e2fs_first_ino);
   80         new->e2fs_inode_size    =       swap16(old->e2fs_inode_size);
   81         new->e2fs_block_group_nr =      swap16(old->e2fs_block_group_nr);
   82         new->e2fs_features_compat =     swap32(old->e2fs_features_compat);
   83         new->e2fs_features_incompat =   swap32(old->e2fs_features_incompat);
   84         new->e2fs_features_rocompat =   swap32(old->e2fs_features_rocompat);
   85         new->e2fs_algo          =       swap32(old->e2fs_algo);
   86 }
   87 
   88 void
   89 e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size)
   90 {
   91         int i;
   92         for (i=0; i < (size / sizeof(struct  ext2_gd)); i++) {
   93                 new[i].ext2bgd_b_bitmap = swap32(old[i].ext2bgd_b_bitmap);
   94                 new[i].ext2bgd_i_bitmap = swap32(old[i].ext2bgd_i_bitmap);
   95                 new[i].ext2bgd_i_tables = swap32(old[i].ext2bgd_i_tables);
   96                 new[i].ext2bgd_nbfree   = swap16(old[i].ext2bgd_nbfree);
   97                 new[i].ext2bgd_nifree   = swap16(old[i].ext2bgd_nifree);
   98                 new[i].ext2bgd_ndirs    = swap16(old[i].ext2bgd_ndirs);
   99         }
  100 }
  101 
  102 void
  103 e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new)
  104 {
  105         new->e2di_mode          =       swap16(old->e2di_mode);
  106         new->e2di_uid_low       =       swap16(old->e2di_uid_low);
  107         new->e2di_gid_low       =       swap16(old->e2di_gid_low);
  108         new->e2di_uid_high      =       swap16(old->e2di_uid_high);
  109         new->e2di_gid_high      =       swap16(old->e2di_gid_high);
  110         new->e2di_nlink         =       swap16(old->e2di_nlink);
  111         new->e2di_size          =       swap32(old->e2di_size);
  112         new->e2di_atime         =       swap32(old->e2di_atime);
  113         new->e2di_ctime         =       swap32(old->e2di_ctime);
  114         new->e2di_mtime         =       swap32(old->e2di_mtime);
  115         new->e2di_dtime         =       swap32(old->e2di_dtime);
  116         new->e2di_nblock        =       swap32(old->e2di_nblock);
  117         new->e2di_flags         =       swap32(old->e2di_flags);
  118         new->e2di_gen           =       swap32(old->e2di_gen);
  119         new->e2di_facl          =       swap32(old->e2di_facl);
  120         new->e2di_dacl          =       swap32(old->e2di_dacl);
  121         new->e2di_faddr         =       swap32(old->e2di_faddr);
  122         memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
  123                 (NDADDR+NIADDR) * sizeof(int));
  124 }
  125 #endif

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