1/* $OpenBSD: ext2fs_bswap.c,v 1.8 2014/07/31 17:37:52 pelikan 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 41#include <ufs/ext2fs/ext2fs.h> 42#include <ufs/ext2fs/ext2fs_dinode.h> 43 44#if !defined(_KERNEL) 45#include <string.h> 46#endif 47 48/* These functions are only needed if native byte order is not big endian */ 49#if BYTE_ORDER == BIG_ENDIAN 50void 51e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new) 52{ 53 /* preserve unused fields */ 54 memcpy(new, old, sizeof(struct ext2fs)); 55 new->e2fs_icount = swap32(old->e2fs_icount); 56 new->e2fs_bcount = swap32(old->e2fs_bcount); 57 new->e2fs_rbcount = swap32(old->e2fs_rbcount); 58 new->e2fs_fbcount = swap32(old->e2fs_fbcount); 59 new->e2fs_ficount = swap32(old->e2fs_ficount); 60 new->e2fs_first_dblock = swap32(old->e2fs_first_dblock); 61 new->e2fs_log_bsize = swap32(old->e2fs_log_bsize); 62 new->e2fs_log_fsize = swap32(old->e2fs_log_fsize); 63 new->e2fs_bpg = swap32(old->e2fs_bpg); 64 new->e2fs_fpg = swap32(old->e2fs_fpg); 65 new->e2fs_ipg = swap32(old->e2fs_ipg); 66 new->e2fs_mtime = swap32(old->e2fs_mtime); 67 new->e2fs_wtime = swap32(old->e2fs_wtime); 68 new->e2fs_mnt_count = swap16(old->e2fs_mnt_count); 69 new->e2fs_max_mnt_count = swap16(old->e2fs_max_mnt_count); 70 new->e2fs_magic = swap16(old->e2fs_magic); 71 new->e2fs_state = swap16(old->e2fs_state); 72 new->e2fs_beh = swap16(old->e2fs_beh); 73 new->e2fs_minrev = swap16(old->e2fs_minrev); 74 new->e2fs_lastfsck = swap32(old->e2fs_lastfsck); 75 new->e2fs_fsckintv = swap32(old->e2fs_fsckintv); 76 new->e2fs_creator = swap32(old->e2fs_creator); 77 new->e2fs_rev = swap32(old->e2fs_rev); 78 new->e2fs_ruid = swap16(old->e2fs_ruid); 79 new->e2fs_rgid = swap16(old->e2fs_rgid); 80 new->e2fs_first_ino = swap32(old->e2fs_first_ino); 81 new->e2fs_inode_size = swap16(old->e2fs_inode_size); 82 new->e2fs_block_group_nr = swap16(old->e2fs_block_group_nr); 83 new->e2fs_features_compat = swap32(old->e2fs_features_compat); 84 new->e2fs_features_incompat = swap32(old->e2fs_features_incompat); 85 new->e2fs_features_rocompat = swap32(old->e2fs_features_rocompat); 86 new->e2fs_algo = swap32(old->e2fs_algo); 87 88 /* SOME journaling-related fields. */ 89 new->e2fs_journal_ino = swap32(old->e2fs_journal_ino); 90 new->e2fs_journal_dev = swap32(old->e2fs_journal_dev); 91 new->e2fs_last_orphan = swap32(old->e2fs_last_orphan); 92 new->e2fs_gdesc_size = swap16(old->e2fs_gdesc_size); 93 new->e2fs_default_mount_opts = swap32(old->e2fs_default_mount_opts); 94 new->e2fs_first_meta_bg = swap32(old->e2fs_first_meta_bg); 95 new->e2fs_mkfs_time = swap32(old->e2fs_mkfs_time); 96} 97 98void 99e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size) 100{ 101 int i; 102 for (i=0; i < (size / sizeof(struct ext2_gd)); i++) { 103 new[i].ext2bgd_b_bitmap = swap32(old[i].ext2bgd_b_bitmap); 104 new[i].ext2bgd_i_bitmap = swap32(old[i].ext2bgd_i_bitmap); 105 new[i].ext2bgd_i_tables = swap32(old[i].ext2bgd_i_tables); 106 new[i].ext2bgd_nbfree = swap16(old[i].ext2bgd_nbfree); 107 new[i].ext2bgd_nifree = swap16(old[i].ext2bgd_nifree); 108 new[i].ext2bgd_ndirs = swap16(old[i].ext2bgd_ndirs); 109 } 110} 111 112void 113e2fs_i_bswap(struct m_ext2fs *fs, struct ext2fs_dinode *old, 114 struct ext2fs_dinode *new) 115{ 116 new->e2di_mode = swap16(old->e2di_mode); 117 new->e2di_uid_low = swap16(old->e2di_uid_low); 118 new->e2di_gid_low = swap16(old->e2di_gid_low); 119 new->e2di_uid_high = swap16(old->e2di_uid_high); 120 new->e2di_gid_high = swap16(old->e2di_gid_high); 121 new->e2di_nlink = swap16(old->e2di_nlink); 122 new->e2di_size = swap32(old->e2di_size); 123 new->e2di_atime = swap32(old->e2di_atime); 124 new->e2di_ctime = swap32(old->e2di_ctime); 125 new->e2di_mtime = swap32(old->e2di_mtime); 126 new->e2di_dtime = swap32(old->e2di_dtime); 127 new->e2di_nblock = swap32(old->e2di_nblock); 128 new->e2di_flags = swap32(old->e2di_flags); 129 new->e2di_gen = swap32(old->e2di_gen); 130 new->e2di_facl = swap32(old->e2di_facl); 131 new->e2di_size_hi = swap32(old->e2di_size_hi); 132 new->e2di_faddr = swap32(old->e2di_faddr); 133 new->e2di_nblock_hi = swap16(old->e2di_nblock_hi); 134 new->e2di_facl_hi = swap16(old->e2di_facl_hi); 135 memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0], 136 (NDADDR+NIADDR) * sizeof(int)); 137 138 if (EXT2_DINODE_SIZE(fs) <= EXT2_REV0_DINODE_SIZE) 139 return; 140 new->e2di_isize = swap16(old->e2di_isize); 141} 142#endif 143