lib/ext2fs/swapfs.c

   1 /*
   2  * swapfs.c --- swap ext2 filesystem data structures
   3  *
   4  * Copyright (C) 1995, 1996, 2002 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  */
  11
  12 #include <stdio.h>
  13 #if HAVE_UNISTD_H
  14 #include <unistd.h>
  15 #endif
  16 #include <time.h>
  17
  18 #include "ext2_fs.h"
  19 #include "ext2fs.h"
  20
  21 #ifdef EXT2FS_ENABLE_SWAPFS
  22 void ext2fs_swap_super(struct ext2_super_block * sb)
  23 {
  24         int i;
  25         sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count);
  26         sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count);
  27         sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count);
  28         sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count);
  29         sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count);
  30         sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block);
  31         sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size);
  32         sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size);
  33         sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group);
  34         sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group);
  35         sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group);
  36         sb->s_mtime = ext2fs_swab32(sb->s_mtime);
  37         sb->s_wtime = ext2fs_swab32(sb->s_wtime);
  38         sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count);
  39         sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count);
  40         sb->s_magic = ext2fs_swab16(sb->s_magic);
  41         sb->s_state = ext2fs_swab16(sb->s_state);
  42         sb->s_errors = ext2fs_swab16(sb->s_errors);
  43         sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level);
  44         sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck);
  45         sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval);
  46         sb->s_creator_os = ext2fs_swab32(sb->s_creator_os);
  47         sb->s_rev_level = ext2fs_swab32(sb->s_rev_level);
  48         sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid);
  49         sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid);
  50         sb->s_first_ino = ext2fs_swab32(sb->s_first_ino);
  51         sb->s_inode_size = ext2fs_swab16(sb->s_inode_size);
  52         sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr);
  53         sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat);
  54         sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat);
  55         sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat);
  56         sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap);
  57         sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum);
  58         sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev);
  59         sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan);
  60         for (i=0; i < 4; i++)
  61                 sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]);
  62 }
  63
  64 void ext2fs_swap_group_desc(struct ext2_group_desc *gdp)
  65 {
  66         gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap);
  67         gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap);
  68         gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table);
  69         gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count);
  70         gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count);
  71         gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count);
  72 }
  73
  74 void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t,
  75                        struct ext2_inode *f, int hostorder)
  76 {
  77         unsigned i;
  78         int islnk = 0;
  79
  80         if (hostorder && LINUX_S_ISLNK(f->i_mode))
  81                 islnk = 1;
  82         t->i_mode = ext2fs_swab16(f->i_mode);
  83         if (!hostorder && LINUX_S_ISLNK(t->i_mode))
  84                 islnk = 1;
  85         t->i_uid = ext2fs_swab16(f->i_uid);
  86         t->i_size = ext2fs_swab32(f->i_size);
  87         t->i_atime = ext2fs_swab32(f->i_atime);
  88         t->i_ctime = ext2fs_swab32(f->i_ctime);
  89         t->i_mtime = ext2fs_swab32(f->i_mtime);
  90         t->i_dtime = ext2fs_swab32(f->i_dtime);
  91         t->i_gid = ext2fs_swab16(f->i_gid);
  92         t->i_links_count = ext2fs_swab16(f->i_links_count);
  93         t->i_blocks = ext2fs_swab32(f->i_blocks);
  94         t->i_flags = ext2fs_swab32(f->i_flags);
  95         if (!islnk || f->i_blocks) {
  96                 for (i = 0; i < EXT2_N_BLOCKS; i++)
  97                         t->i_block[i] = ext2fs_swab32(f->i_block[i]);
  98         } else if (t != f) {
  99                 for (i = 0; i < EXT2_N_BLOCKS; i++)
 100                         t->i_block[i] = f->i_block[i];
 101         }
 102         t->i_generation = ext2fs_swab32(f->i_generation);
 103         t->i_file_acl = ext2fs_swab32(f->i_file_acl);
 104         t->i_dir_acl = ext2fs_swab32(f->i_dir_acl);
 105         t->i_faddr = ext2fs_swab32(f->i_faddr);
 106
 107         switch (fs->super->s_creator_os) {
 108         case EXT2_OS_LINUX:
 109                 t->osd1.linux1.l_i_reserved1 =
 110                         ext2fs_swab32(f->osd1.linux1.l_i_reserved1);
 111                 t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag;
 112                 t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize;
 113                 t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1);
 114                 t->osd2.linux2.l_i_uid_high =
 115                   ext2fs_swab16 (f->osd2.linux2.l_i_uid_high);
 116                 t->osd2.linux2.l_i_gid_high =
 117                   ext2fs_swab16 (f->osd2.linux2.l_i_gid_high);
 118                 t->osd2.linux2.l_i_reserved2 =
 119                         ext2fs_swab32(f->osd2.linux2.l_i_reserved2);
 120                 break;
 121         case EXT2_OS_HURD:
 122                 t->osd1.hurd1.h_i_translator =
 123                   ext2fs_swab32 (f->osd1.hurd1.h_i_translator);
 124                 t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag;
 125                 t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize;
 126                 t->osd2.hurd2.h_i_mode_high =
 127                   ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high);
 128                 t->osd2.hurd2.h_i_uid_high =
 129                   ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high);
 130                 t->osd2.hurd2.h_i_gid_high =
 131                   ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high);
 132                 t->osd2.hurd2.h_i_author =
 133                   ext2fs_swab32 (f->osd2.hurd2.h_i_author);
 134                 break;
 135         case EXT2_OS_MASIX:
 136                 t->osd1.masix1.m_i_reserved1 =
 137                         ext2fs_swab32(f->osd1.masix1.m_i_reserved1);
 138                 t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag;
 139                 t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize;
 140                 t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1);
 141                 t->osd2.masix2.m_i_reserved2[0] =
 142                         ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]);
 143                 t->osd2.masix2.m_i_reserved2[1] =
 144                         ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]);
 145                 break;
 146         }
 147 }
 148 #endif