swapfs.c revision e5b38a5fafe4807b54d90a2e70bddf4b41b1695b
1/* 2 * swapfs.c --- swap ext2 filesystem data structures 3 * 4 * Copyright (C) 1995, 1996 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#if EXT2_FLAT_INCLUDES 19#include "ext2_fs.h" 20#else 21#include <linux/ext2_fs.h> 22#endif 23 24#include "ext2fs.h" 25 26void ext2fs_swap_super(struct ext2_super_block * sb) 27{ 28 sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); 29 sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); 30 sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); 31 sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); 32 sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); 33 sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); 34 sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); 35 sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size); 36 sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); 37 sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group); 38 sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); 39 sb->s_mtime = ext2fs_swab32(sb->s_mtime); 40 sb->s_wtime = ext2fs_swab32(sb->s_wtime); 41 sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); 42 sb->s_max_mnt_count = ext2fs_swab16(sb->s_max_mnt_count); 43 sb->s_magic = ext2fs_swab16(sb->s_magic); 44 sb->s_state = ext2fs_swab16(sb->s_state); 45 sb->s_errors = ext2fs_swab16(sb->s_errors); 46 sb->s_minor_rev_level = ext2fs_swab16(sb->s_minor_rev_level); 47 sb->s_lastcheck = ext2fs_swab32(sb->s_lastcheck); 48 sb->s_checkinterval = ext2fs_swab32(sb->s_checkinterval); 49 sb->s_creator_os = ext2fs_swab32(sb->s_creator_os); 50 sb->s_rev_level = ext2fs_swab32(sb->s_rev_level); 51 sb->s_def_resuid = ext2fs_swab16(sb->s_def_resuid); 52 sb->s_def_resgid = ext2fs_swab16(sb->s_def_resgid); 53 sb->s_first_ino = ext2fs_swab32(sb->s_first_ino); 54 sb->s_inode_size = ext2fs_swab16(sb->s_inode_size); 55 sb->s_block_group_nr = ext2fs_swab16(sb->s_block_group_nr); 56 sb->s_feature_compat = ext2fs_swab32(sb->s_feature_compat); 57 sb->s_feature_incompat = ext2fs_swab32(sb->s_feature_incompat); 58 sb->s_feature_ro_compat = ext2fs_swab32(sb->s_feature_ro_compat); 59 sb->s_algorithm_usage_bitmap = ext2fs_swab32(sb->s_algorithm_usage_bitmap); 60 sb->s_journal_inum = ext2fs_swab32(sb->s_journal_inum); 61 sb->s_journal_dev = ext2fs_swab32(sb->s_journal_dev); 62 sb->s_last_orphan = ext2fs_swab32(sb->s_last_orphan); 63} 64 65void ext2fs_swap_group_desc(struct ext2_group_desc *gdp) 66{ 67 gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); 68 gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); 69 gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); 70 gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); 71 gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); 72 gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); 73} 74 75void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, 76 struct ext2_inode *f, int hostorder) 77{ 78 unsigned i; 79 int islnk = 0; 80 81 if (hostorder && LINUX_S_ISLNK(f->i_mode)) 82 islnk = 1; 83 t->i_mode = ext2fs_swab16(f->i_mode); 84 if (!hostorder && LINUX_S_ISLNK(t->i_mode)) 85 islnk = 1; 86 t->i_uid = ext2fs_swab16(f->i_uid); 87 t->i_size = ext2fs_swab32(f->i_size); 88 t->i_atime = ext2fs_swab32(f->i_atime); 89 t->i_ctime = ext2fs_swab32(f->i_ctime); 90 t->i_mtime = ext2fs_swab32(f->i_mtime); 91 t->i_dtime = ext2fs_swab32(f->i_dtime); 92 t->i_gid = ext2fs_swab16(f->i_gid); 93 t->i_links_count = ext2fs_swab16(f->i_links_count); 94 t->i_blocks = ext2fs_swab32(f->i_blocks); 95 t->i_flags = ext2fs_swab32(f->i_flags); 96 if (!islnk || f->i_blocks) { 97 for (i = 0; i < EXT2_N_BLOCKS; i++) 98 t->i_block[i] = ext2fs_swab32(f->i_block[i]); 99 } else if (t != f) { 100 for (i = 0; i < EXT2_N_BLOCKS; i++) 101 t->i_block[i] = f->i_block[i]; 102 } 103 t->i_generation = ext2fs_swab32(f->i_generation); 104 t->i_file_acl = ext2fs_swab32(f->i_file_acl); 105 t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); 106 t->i_faddr = ext2fs_swab32(f->i_faddr); 107 108 switch (fs->super->s_creator_os) { 109 case EXT2_OS_LINUX: 110 t->osd1.linux1.l_i_reserved1 = 111 ext2fs_swab32(f->osd1.linux1.l_i_reserved1); 112 t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; 113 t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; 114 t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); 115 t->osd2.linux2.l_i_uid_high = 116 ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); 117 t->osd2.linux2.l_i_gid_high = 118 ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); 119 t->osd2.linux2.l_i_reserved2 = 120 ext2fs_swab32(f->osd2.linux2.l_i_reserved2); 121 break; 122 case EXT2_OS_HURD: 123 t->osd1.hurd1.h_i_translator = 124 ext2fs_swab32 (f->osd1.hurd1.h_i_translator); 125 t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; 126 t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; 127 t->osd2.hurd2.h_i_mode_high = 128 ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); 129 t->osd2.hurd2.h_i_uid_high = 130 ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); 131 t->osd2.hurd2.h_i_gid_high = 132 ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); 133 t->osd2.hurd2.h_i_author = 134 ext2fs_swab32 (f->osd2.hurd2.h_i_author); 135 break; 136 case EXT2_OS_MASIX: 137 t->osd1.masix1.m_i_reserved1 = 138 ext2fs_swab32(f->osd1.masix1.m_i_reserved1); 139 t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; 140 t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; 141 t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); 142 t->osd2.masix2.m_i_reserved2[0] = 143 ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); 144 t->osd2.masix2.m_i_reserved2[1] = 145 ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); 146 break; 147 } 148} 149 150