| 1 | /*␊ |
| 2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
| 7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
| 8 | * Original Code as defined in and that are subject to the Apple Public␊ |
| 9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
| 10 | * except in compliance with the License. Please obtain a copy of the␊ |
| 11 | * License at http://www.apple.com/publicsource and read it before using␊ |
| 12 | * this file.␊ |
| 13 | * ␊ |
| 14 | * The Original Code and all software distributed under the License are␊ |
| 15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
| 19 | * License for the specific language governing rights and limitations␊ |
| 20 | * under the License.␊ |
| 21 | * ␊ |
| 22 | * @APPLE_LICENSE_HEADER_END@␊ |
| 23 | */␊ |
| 24 | /*␊ |
| 25 | * Copyright 1993 NeXT, Inc.␊ |
| 26 | * All rights reserved.␊ |
| 27 | */␊ |
| 28 | ␊ |
| 29 | #include <sys/types.h>␊ |
| 30 | #include <sys/param.h>␊ |
| 31 | #include <sys/vnode.h>␊ |
| 32 | #include <ufs/ufs/dir.h>␊ |
| 33 | #include <libkern/OSByteOrder.h>␊ |
| 34 | ␊ |
| 35 | //#include "libsaio.h" // ufs support reminder (check disk.c)␊ |
| 36 | #include "ufs_byteorder.h"␊ |
| 37 | ␊ |
| 38 | #define␉swapBigLongToHost(thing) ((thing) = OSSwapBigToHostInt32(thing))␊ |
| 39 | #define␉swapBigShortToHost(thing) ((thing) = OSSwapBigToHostInt16(thing))␊ |
| 40 | #define␉byte_swap_longlong(thing) ((thing) = OSSwapBigToHostInt64(thing))␊ |
| 41 | #define␉byte_swap_int(thing) ((thing) = OSSwapBigToHostInt32(thing))␊ |
| 42 | #define␉byte_swap_short(thing) ((thing) = OSSwapBigToHostInt16(thing))␊ |
| 43 | ␊ |
| 44 | #if UNUSED␊ |
| 45 | void␊ |
| 46 | byte_swap_longlongs(unsigned long long *array, int count)␊ |
| 47 | {␊ |
| 48 | ␉register unsigned long long␉i;␊ |
| 49 | ␊ |
| 50 | ␉for (i = 0; i < (unsigned long long)count; i++)␊ |
| 51 | ␉␉byte_swap_longlong(array[i]);␊ |
| 52 | }␊ |
| 53 | #endif␊ |
| 54 | ␊ |
| 55 | void␊ |
| 56 | byte_swap_ints(unsigned int *array, int count)␊ |
| 57 | {␊ |
| 58 | ␉register int␉i;␊ |
| 59 | ␊ |
| 60 | ␉for (i = 0; i < count; i++)␊ |
| 61 | ␉␉byte_swap_int(array[i]);␊ |
| 62 | }␊ |
| 63 | ␊ |
| 64 | void␊ |
| 65 | byte_swap_shorts(unsigned short *array, int count)␊ |
| 66 | {␊ |
| 67 | ␉register int␉i;␊ |
| 68 | ␊ |
| 69 | ␉for (i = 0; i < count; i++)␊ |
| 70 | ␉␉byte_swap_short(array[i]);␊ |
| 71 | }␊ |
| 72 | ␊ |
| 73 | #if UNUSED␊ |
| 74 | static void␊ |
| 75 | swapBigIntsToHost(unsigned int *array, int count)␊ |
| 76 | {␊ |
| 77 | ␉register int␉i;␊ |
| 78 | ␊ |
| 79 | ␉for (i = 0; i < count; i++)␊ |
| 80 | ␉␉swapBigLongToHost(array[i]);␊ |
| 81 | }␊ |
| 82 | ␊ |
| 83 | static void␊ |
| 84 | swapBigShortToHosts(unsigned short *array, int count)␊ |
| 85 | {␊ |
| 86 | ␉register int␉i;␊ |
| 87 | ␊ |
| 88 | ␉for (i = 0; i < count; i++)␊ |
| 89 | ␉␉swapBigShortToHost(array[i]);␊ |
| 90 | }␊ |
| 91 | #endif␊ |
| 92 | ␊ |
| 93 | void␊ |
| 94 | byte_swap_superblock(struct fs *sb)␊ |
| 95 | {␊ |
| 96 | ␉u_int16_t * usptr;␊ |
| 97 | ␉unsigned long size;␊ |
| 98 | ␊ |
| 99 | ␉byte_swap_ints(((u_int32_t *)&sb->fs_firstfield), 52);␊ |
| 100 | ␉byte_swap_int(sb->fs_cgrotor);␊ |
| 101 | ␉byte_swap_int(sb->fs_cpc);␊ |
| 102 | ␉byte_swap_shorts((u_int16_t *)sb->fs_opostbl, 16 * 8); ␊ |
| 103 | ␉byte_swap_ints((u_int32_t *)sb->fs_sparecon, 50);␊ |
| 104 | ␉byte_swap_ints((u_int32_t *)&sb->fs_contigsumsize, 3);␊ |
| 105 | #if UNUSED␊ |
| 106 | ␉byte_swap_longlongs((u_int64_t *)&sb->fs_maxfilesize,3);␊ |
| 107 | #endif␊ |
| 108 | ␉byte_swap_ints((u_int32_t *)&sb->fs_state, 6);␊ |
| 109 | ␊ |
| 110 | ␉/* Got these magic numbers from mkfs.c in newfs */␊ |
| 111 | ␉if (sb->fs_nrpos != 8 || sb->fs_cpc > 16) {␊ |
| 112 | ␉␉usptr = (u_int16_t *)((u_int8_t *)(sb) + (sb)->fs_postbloff);␊ |
| 113 | ␉␉size = sb->fs_cpc * sb->fs_nrpos;␊ |
| 114 | ␉␉byte_swap_shorts(usptr,size);␉/* fs_postbloff */␊ |
| 115 | ␉}␊ |
| 116 | }␊ |
| 117 | ␊ |
| 118 | ␊ |
| 119 | /* This value should correspond to the value set in the ffs_mounts */␊ |
| 120 | ␊ |
| 121 | #define RESYMLNKLEN 60␊ |
| 122 | ␊ |
| 123 | void␊ |
| 124 | byte_swap_dinode_in(struct dinode *di)␊ |
| 125 | {␊ |
| 126 | ␉int i;␊ |
| 127 | ␊ |
| 128 | ␉di->di_mode = OSSwapInt16(di->di_mode);␊ |
| 129 | ␉di->di_nlink = OSSwapInt16(di->di_nlink);␊ |
| 130 | #ifdef LFS␊ |
| 131 | ␉di->di_u.inumber = OSSwapInt32(di->di_u.inumber);␊ |
| 132 | #else␊ |
| 133 | ␉di->di_u.oldids[0] = OSSwapInt16(di->di_u.oldids[0]);␊ |
| 134 | ␉di->di_u.oldids[1] = OSSwapInt16(di->di_u.oldids[1]);␊ |
| 135 | #endif␊ |
| 136 | ␉di->di_size = OSSwapInt64(di->di_size);␊ |
| 137 | ␉di->di_atime = OSSwapInt32(di->di_atime);␊ |
| 138 | ␉di->di_atimensec = OSSwapInt32(di->di_atimensec);␊ |
| 139 | ␉di->di_mtime = OSSwapInt32(di->di_mtime);␊ |
| 140 | ␉di->di_mtimensec = OSSwapInt32(di->di_mtimensec);␊ |
| 141 | ␉di->di_ctime = OSSwapInt32(di->di_ctime);␊ |
| 142 | ␉di->di_ctimensec = OSSwapInt32(di->di_ctimensec);␊ |
| 143 | ␉if (((di->di_mode & IFMT) != IFLNK ) || (di->di_size > RESYMLNKLEN)) {␊ |
| 144 | ␉␉for (i=0; i < NDADDR; i++)␉/* direct blocks */␊ |
| 145 | ␉␉␉di->di_db[i] = OSSwapInt32(di->di_db[i]);␊ |
| 146 | ␉␉for (i=0; i < NIADDR; i++)␉/* indirect blocks */␊ |
| 147 | ␉␉␉di->di_ib[i] = OSSwapInt32(di->di_ib[i]);␊ |
| 148 | ␉}␊ |
| 149 | ␉di->di_flags = OSSwapInt32(di->di_flags);␊ |
| 150 | ␉di->di_blocks = OSSwapInt32(di->di_blocks);␊ |
| 151 | ␉di->di_gen = OSSwapInt32(di->di_gen);␊ |
| 152 | ␉di->di_uid = OSSwapInt32(di->di_uid);␊ |
| 153 | ␉di->di_gid = OSSwapInt32(di->di_gid);␊ |
| 154 | ␉di->di_spare[0] = OSSwapInt32(di->di_spare[0]);␊ |
| 155 | ␉di->di_spare[1] = OSSwapInt32(di->di_spare[1]);␊ |
| 156 | }␊ |
| 157 | ␊ |
| 158 | void␊ |
| 159 | byte_swap_dir_block_in(char *addr, int count)␊ |
| 160 | {␊ |
| 161 | ␉register struct direct * ep = (struct direct *) addr;␊ |
| 162 | ␉register int␉␉ entryoffsetinblk = 0;␊ |
| 163 | ␊ |
| 164 | ␉while (entryoffsetinblk < count) {␊ |
| 165 | ␉␉ep = (struct direct *) (entryoffsetinblk + addr);␊ |
| 166 | ␉␉swapBigLongToHost(ep->d_ino);␊ |
| 167 | ␉␉swapBigShortToHost(ep->d_reclen);␊ |
| 168 | ␉␉entryoffsetinblk += ep->d_reclen;␊ |
| 169 | ␉␉if (ep->d_reclen < 12)␉␉/* handle garbage in dirs */␊ |
| 170 | ␉␉␉break;␊ |
| 171 | ␉}␊ |
| 172 | }␊ |
| 173 | |
