swapfs.c revision 1ba7a2f2b6a9b152828a06443955a7fb1d139930
1c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch/* 2eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch * swapfs.c --- swap ext2 filesystem data structures 3eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch * 4eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch * Copyright (C) 1995, 1996, 2002 Theodore Ts'o. 5c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch * 6c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch * %Begin-Header% 7eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch * This file may be redistributed under the terms of the GNU Public 8eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch * License. 95d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) * %End-Header% 10eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch */ 11eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 12eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include <stdio.h> 13eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#if HAVE_UNISTD_H 14eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include <unistd.h> 15eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#endif 16f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles)#include <time.h> 175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 18eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "ext2_fs.h" 19558790d6acca3451cf3a6b497803a5f07d0bec58Ben Murdoch#include "ext2fs.h" 20eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 21eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#ifdef EXT2FS_ENABLE_SWAPFS 225d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)void ext2fs_swap_super(struct ext2_super_block * sb) 23eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch{ 24eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch int i; 25eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_inodes_count = ext2fs_swab32(sb->s_inodes_count); 26eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_blocks_count = ext2fs_swab32(sb->s_blocks_count); 27eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_r_blocks_count = ext2fs_swab32(sb->s_r_blocks_count); 285d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) sb->s_free_blocks_count = ext2fs_swab32(sb->s_free_blocks_count); 295d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) sb->s_free_inodes_count = ext2fs_swab32(sb->s_free_inodes_count); 305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) sb->s_first_data_block = ext2fs_swab32(sb->s_first_data_block); 315d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) sb->s_log_block_size = ext2fs_swab32(sb->s_log_block_size); 325d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) sb->s_log_frag_size = ext2fs_swab32(sb->s_log_frag_size); 33eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_blocks_per_group = ext2fs_swab32(sb->s_blocks_per_group); 34eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_frags_per_group = ext2fs_swab32(sb->s_frags_per_group); 35eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_inodes_per_group = ext2fs_swab32(sb->s_inodes_per_group); 36eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_mtime = ext2fs_swab32(sb->s_mtime); 37eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_wtime = ext2fs_swab32(sb->s_wtime); 38eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch sb->s_mnt_count = ext2fs_swab16(sb->s_mnt_count); 39c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch 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 sb->s_default_mount_opts = ext2fs_swab32(sb->s_default_mount_opts); 61 sb->s_first_meta_bg = ext2fs_swab32(sb->s_first_meta_bg); 62 sb->s_mkfs_time = ext2fs_swab32(sb->s_mkfs_time); 63 for (i=0; i < 4; i++) 64 sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]); 65 for (i=0; i < 17; i++) 66 sb->s_jnl_blocks[i] = ext2fs_swab32(sb->s_jnl_blocks[i]); 67 68} 69 70void ext2fs_swap_group_desc(struct ext2_group_desc *gdp) 71{ 72 gdp->bg_block_bitmap = ext2fs_swab32(gdp->bg_block_bitmap); 73 gdp->bg_inode_bitmap = ext2fs_swab32(gdp->bg_inode_bitmap); 74 gdp->bg_inode_table = ext2fs_swab32(gdp->bg_inode_table); 75 gdp->bg_free_blocks_count = ext2fs_swab16(gdp->bg_free_blocks_count); 76 gdp->bg_free_inodes_count = ext2fs_swab16(gdp->bg_free_inodes_count); 77 gdp->bg_used_dirs_count = ext2fs_swab16(gdp->bg_used_dirs_count); 78} 79 80void ext2fs_swap_inode(ext2_filsys fs, struct ext2_inode *t, 81 struct ext2_inode *f, int hostorder) 82{ 83 unsigned i; 84 int islnk = 0; 85 86 if (hostorder && LINUX_S_ISLNK(f->i_mode)) 87 islnk = 1; 88 t->i_mode = ext2fs_swab16(f->i_mode); 89 if (!hostorder && LINUX_S_ISLNK(t->i_mode)) 90 islnk = 1; 91 t->i_uid = ext2fs_swab16(f->i_uid); 92 t->i_size = ext2fs_swab32(f->i_size); 93 t->i_atime = ext2fs_swab32(f->i_atime); 94 t->i_ctime = ext2fs_swab32(f->i_ctime); 95 t->i_mtime = ext2fs_swab32(f->i_mtime); 96 t->i_dtime = ext2fs_swab32(f->i_dtime); 97 t->i_gid = ext2fs_swab16(f->i_gid); 98 t->i_links_count = ext2fs_swab16(f->i_links_count); 99 t->i_blocks = ext2fs_swab32(f->i_blocks); 100 t->i_flags = ext2fs_swab32(f->i_flags); 101 t->i_file_acl = ext2fs_swab32(f->i_file_acl); 102 t->i_dir_acl = ext2fs_swab32(f->i_dir_acl); 103 if (!islnk || ext2fs_inode_data_blocks(fs, t)) { 104 for (i = 0; i < EXT2_N_BLOCKS; i++) 105 t->i_block[i] = ext2fs_swab32(f->i_block[i]); 106 } else if (t != f) { 107 for (i = 0; i < EXT2_N_BLOCKS; i++) 108 t->i_block[i] = f->i_block[i]; 109 } 110 t->i_generation = ext2fs_swab32(f->i_generation); 111 t->i_faddr = ext2fs_swab32(f->i_faddr); 112 113 switch (fs->super->s_creator_os) { 114 case EXT2_OS_LINUX: 115 t->osd1.linux1.l_i_reserved1 = 116 ext2fs_swab32(f->osd1.linux1.l_i_reserved1); 117 t->osd2.linux2.l_i_frag = f->osd2.linux2.l_i_frag; 118 t->osd2.linux2.l_i_fsize = f->osd2.linux2.l_i_fsize; 119 t->osd2.linux2.i_pad1 = ext2fs_swab16(f->osd2.linux2.i_pad1); 120 t->osd2.linux2.l_i_uid_high = 121 ext2fs_swab16 (f->osd2.linux2.l_i_uid_high); 122 t->osd2.linux2.l_i_gid_high = 123 ext2fs_swab16 (f->osd2.linux2.l_i_gid_high); 124 t->osd2.linux2.l_i_reserved2 = 125 ext2fs_swab32(f->osd2.linux2.l_i_reserved2); 126 break; 127 case EXT2_OS_HURD: 128 t->osd1.hurd1.h_i_translator = 129 ext2fs_swab32 (f->osd1.hurd1.h_i_translator); 130 t->osd2.hurd2.h_i_frag = f->osd2.hurd2.h_i_frag; 131 t->osd2.hurd2.h_i_fsize = f->osd2.hurd2.h_i_fsize; 132 t->osd2.hurd2.h_i_mode_high = 133 ext2fs_swab16 (f->osd2.hurd2.h_i_mode_high); 134 t->osd2.hurd2.h_i_uid_high = 135 ext2fs_swab16 (f->osd2.hurd2.h_i_uid_high); 136 t->osd2.hurd2.h_i_gid_high = 137 ext2fs_swab16 (f->osd2.hurd2.h_i_gid_high); 138 t->osd2.hurd2.h_i_author = 139 ext2fs_swab32 (f->osd2.hurd2.h_i_author); 140 break; 141 case EXT2_OS_MASIX: 142 t->osd1.masix1.m_i_reserved1 = 143 ext2fs_swab32(f->osd1.masix1.m_i_reserved1); 144 t->osd2.masix2.m_i_frag = f->osd2.masix2.m_i_frag; 145 t->osd2.masix2.m_i_fsize = f->osd2.masix2.m_i_fsize; 146 t->osd2.masix2.m_pad1 = ext2fs_swab16(f->osd2.masix2.m_pad1); 147 t->osd2.masix2.m_i_reserved2[0] = 148 ext2fs_swab32(f->osd2.masix2.m_i_reserved2[0]); 149 t->osd2.masix2.m_i_reserved2[1] = 150 ext2fs_swab32(f->osd2.masix2.m_i_reserved2[1]); 151 break; 152 } 153} 154#endif 155