swapfs.c revision 19c78dc07fce2d6f39b5e541562afc3ca1ea38ff
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#include <unistd.h> 14#include <stdlib.h> 15#include <time.h> 16 17#include <linux/ext2_fs.h> 18 19#include "ext2fs.h" 20 21void ext2fs_swap_super(struct ext2_super_block * super) 22{ 23 struct ext2fs_sb *s = (struct ext2fs_sb *) super; 24 25 super->s_inodes_count = ext2fs_swab32(super->s_inodes_count); 26 super->s_blocks_count = ext2fs_swab32(super->s_blocks_count); 27 super->s_r_blocks_count = ext2fs_swab32(super->s_r_blocks_count); 28 super->s_free_blocks_count = ext2fs_swab32(super->s_free_blocks_count); 29 super->s_free_inodes_count = ext2fs_swab32(super->s_free_inodes_count); 30 super->s_first_data_block = ext2fs_swab32(super->s_first_data_block); 31 super->s_log_block_size = ext2fs_swab32(super->s_log_block_size); 32 super->s_log_frag_size = ext2fs_swab32(super->s_log_frag_size); 33 super->s_blocks_per_group = ext2fs_swab32(super->s_blocks_per_group); 34 super->s_frags_per_group = ext2fs_swab32(super->s_frags_per_group); 35 super->s_inodes_per_group = ext2fs_swab32(super->s_inodes_per_group); 36 super->s_mtime = ext2fs_swab32(super->s_mtime); 37 super->s_wtime = ext2fs_swab32(super->s_wtime); 38 super->s_mnt_count = ext2fs_swab16(super->s_mnt_count); 39 super->s_max_mnt_count = ext2fs_swab16(super->s_max_mnt_count); 40 super->s_magic = ext2fs_swab16(super->s_magic); 41 super->s_state = ext2fs_swab16(super->s_state); 42 super->s_errors = ext2fs_swab16(super->s_errors); 43 s->s_minor_rev_level = ext2fs_swab16(s->s_minor_rev_level); 44 super->s_lastcheck = ext2fs_swab32(super->s_lastcheck); 45 super->s_checkinterval = ext2fs_swab32(super->s_checkinterval); 46 super->s_creator_os = ext2fs_swab32(super->s_creator_os); 47 super->s_rev_level = ext2fs_swab32(super->s_rev_level); 48#ifdef EXT2_DEF_RESUID 49 super->s_def_resuid = ext2fs_swab16(super->s_def_resuid); 50 super->s_def_resgid = ext2fs_swab16(super->s_def_resgid); 51#endif 52 s->s_first_ino = ext2fs_swab32(s->s_first_ino); 53 s->s_inode_size = ext2fs_swab16(s->s_inode_size); 54 s->s_block_group_nr = ext2fs_swab16(s->s_block_group_nr); 55 s->s_feature_compat = ext2fs_swab32(s->s_feature_compat); 56 s->s_feature_incompat = ext2fs_swab32(s->s_feature_incompat); 57 s->s_feature_ro_compat = ext2fs_swab32(s->s_feature_ro_compat); 58} 59 60void ext2fs_swap_group_desc(struct ext2_group_desc *gdp) 61{ 62 gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); 63 gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); 64 gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); 65 gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); 66 gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); 67 gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); 68} 69 70void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, 71 struct ext2_inode *f, int hostorder) 72{ 73 unsigned i; 74 int islnk = 0; 75 76 if (hostorder && LINUX_S_ISLNK(f->i_mode)) 77 islnk = 1; 78 t->i_mode = ext2fs_swab16(f->i_mode); 79 if (!hostorder && LINUX_S_ISLNK(t->i_mode)) 80 islnk = 1; 81 t->i_uid = ext2fs_swab16(f->i_uid); 82 t->i_size = ext2fs_swab32(f->i_size); 83 t->i_atime = ext2fs_swab32(f->i_atime); 84 t->i_ctime = ext2fs_swab32(f->i_ctime); 85 t->i_mtime = ext2fs_swab32(f->i_mtime); 86 t->i_dtime = ext2fs_swab32(f->i_dtime); 87 t->i_gid = ext2fs_swab16(f->i_gid); 88 t->i_links_count = ext2fs_swab16(f->i_links_count); 89 t->i_blocks = ext2fs_swab32(f->i_blocks); 90 t->i_flags = ext2fs_swab32(f->i_flags); 91 if (!islnk || f->i_blocks) { 92 for (i = 0; i < EXT2_N_BLOCKS; i++) 93 t->i_block[i] = ext2fs_swab32(f->i_block[i]); 94 } else if (t != f) { 95 for (i = 0; i < EXT2_N_BLOCKS; i++) 96 t->i_block[i] = f->i_block[i]; 97 } 98 t->i_version = ext2fs_swab32(f->i_version); 99 t->i_file_acl = ext2fs_swab32(f->i_file_acl); 100 t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); 101 t->i_faddr = ext2fs_swab32(f->i_faddr); 102 103 switch (fs->super->s_creator_os) { 104 case EXT2_OS_LINUX: 105 t->osd1.linux1.l_i_reserved1 = 106 ext2fs_swab32(f->osd1.linux1.l_i_reserved1); 107 t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; 108 t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; 109 t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); 110 t->osd2.linux2.l_i_reserved2[0] = 111 ext2fs_swab32(f->osd2.linux2.l_i_reserved2[0]); 112 t->osd2.linux2.l_i_reserved2[1] = 113 ext2fs_swab32(f->osd2.linux2.l_i_reserved2[1]); 114 break; 115 case EXT2_OS_HURD: 116 t->osd1.hurd1.h_i_translator = 117 ext2fs_swab32 (f->osd1.hurd1.h_i_translator); 118 t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; 119 t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; 120 t->osd2.hurd2.h_i_mode_high = 121 ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); 122 t->osd2.hurd2.h_i_uid_high = 123 ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); 124 t->osd2.hurd2.h_i_gid_high = 125 ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); 126 t->osd2.hurd2.h_i_author = 127 ext2fs_swab32 (f->osd2.hurd2.h_i_author); 128 break; 129 case EXT2_OS_MASIX: 130 t->osd1.masix1.m_i_reserved1 = 131 ext2fs_swab32(f->osd1.masix1.m_i_reserved1); 132 t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; 133 t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; 134 t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); 135 t->osd2.masix2.m_i_reserved2[0] = 136 ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); 137 t->osd2.masix2.m_i_reserved2[1] = 138 ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); 139 break; 140 } 141} 142 143