1 /* $NetBSD: ffs_bswap.c,v 1.28 2004/05/25 14:54:59 hannken Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c) 1998 Manuel Bouyer. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: head/usr.sbin/makefs/ffs/ffs_bswap.c 326276 2017-11-27 15:37:16Z pfg $ 29 */ 30 31 #include <sys/param.h> 32 #if defined(_KERNEL) 33 #include <sys/systm.h> 34 #endif 35 36 #if !defined(_KERNEL) 37 #include <stddef.h> 38 #include <stdint.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #endif 43 44 #include <vfs/ufs/dinode.h> 45 #include "ffs/ufs_bswap.h" 46 #include <vfs/ufs/fs.h> 47 #include "ffs/ffs_extern.h" 48 49 #ifdef __DragonFly__ 50 #include "ffs.h" /* XXX swildner: for compat defines */ 51 #else 52 #define fs_old_postbloff fs_spare5[0] 53 #define fs_old_rotbloff fs_spare5[1] 54 #define fs_old_postbl_start fs_maxbsize 55 #define fs_old_headswitch fs_id[0] 56 #define fs_old_trkseek fs_id[1] 57 #define fs_old_csmask fs_spare1[0] 58 #define fs_old_csshift fs_spare1[1] 59 #endif 60 61 #define FS_42POSTBLFMT -1 /* 4.2BSD rotational table format */ 62 #define FS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */ 63 64 void ffs_csum_swap(struct csum *o, struct csum *n, int size); 65 void ffs_csumtotal_swap(struct csum_total *o, struct csum_total *n); 66 67 void 68 ffs_sb_swap(struct fs *o, struct fs *n) 69 { 70 size_t i; 71 u_int32_t *o32, *n32; 72 73 /* 74 * In order to avoid a lot of lines, as the first N fields (52) 75 * of the superblock up to fs_fmod are u_int32_t, we just loop 76 * here to convert them. 77 */ 78 o32 = (u_int32_t *)o; 79 n32 = (u_int32_t *)n; 80 for (i = 0; i < offsetof(struct fs, fs_fmod) / sizeof(u_int32_t); i++) 81 n32[i] = bswap32(o32[i]); 82 83 n->fs_swuid = bswap64(o->fs_swuid); 84 n->fs_cgrotor = bswap32(o->fs_cgrotor); /* Unused */ 85 n->fs_old_cpc = bswap32(o->fs_old_cpc); 86 87 /* These fields overlap with a possible location for the 88 * historic FS_DYNAMICPOSTBLFMT postbl table, and with the 89 * first half of the historic FS_42POSTBLFMT postbl table. 90 */ 91 #ifndef __DragonFly__ 92 n->fs_maxbsize = bswap32(o->fs_maxbsize); 93 n->fs_sblockloc = bswap64(o->fs_sblockloc); 94 #endif 95 ffs_csumtotal_swap(&o->fs_cstotal, &n->fs_cstotal); 96 n->fs_time = bswap64(o->fs_time); 97 n->fs_size = bswap64(o->fs_size); 98 n->fs_dsize = bswap64(o->fs_dsize); 99 n->fs_csaddr = bswap64(o->fs_csaddr); 100 n->fs_pendingblocks = bswap64(o->fs_pendingblocks); 101 n->fs_pendinginodes = bswap32(o->fs_pendinginodes); 102 103 /* These fields overlap with the second half of the 104 * historic FS_42POSTBLFMT postbl table 105 */ 106 for (i = 0; i < FSMAXSNAP; i++) 107 n->fs_snapinum[i] = bswap32(o->fs_snapinum[i]); 108 n->fs_avgfilesize = bswap32(o->fs_avgfilesize); 109 n->fs_avgfpdir = bswap32(o->fs_avgfpdir); 110 /* fs_sparecon[28] - ignore for now */ 111 n->fs_flags = bswap32(o->fs_flags); 112 n->fs_contigsumsize = bswap32(o->fs_contigsumsize); 113 n->fs_maxsymlinklen = bswap32(o->fs_maxsymlinklen); 114 n->fs_old_inodefmt = bswap32(o->fs_old_inodefmt); 115 n->fs_maxfilesize = bswap64(o->fs_maxfilesize); 116 n->fs_qbmask = bswap64(o->fs_qbmask); 117 n->fs_qfmask = bswap64(o->fs_qfmask); 118 n->fs_state = bswap32(o->fs_state); 119 n->fs_old_postblformat = bswap32(o->fs_old_postblformat); 120 n->fs_old_nrpos = bswap32(o->fs_old_nrpos); 121 n->fs_old_postbloff = bswap32(o->fs_old_postbloff); 122 n->fs_old_rotbloff = bswap32(o->fs_old_rotbloff); 123 124 n->fs_magic = bswap32(o->fs_magic); 125 } 126 127 void 128 ffs_dinode1_swap(struct ufs1_dinode *o, struct ufs1_dinode *n) 129 { 130 131 n->di_mode = bswap16(o->di_mode); 132 n->di_nlink = bswap16(o->di_nlink); 133 n->di_size = bswap64(o->di_size); 134 n->di_atime = bswap32(o->di_atime); 135 n->di_atimensec = bswap32(o->di_atimensec); 136 n->di_mtime = bswap32(o->di_mtime); 137 n->di_mtimensec = bswap32(o->di_mtimensec); 138 n->di_ctime = bswap32(o->di_ctime); 139 n->di_ctimensec = bswap32(o->di_ctimensec); 140 memcpy(n->di_db, o->di_db, sizeof(n->di_db)); 141 memcpy(n->di_ib, o->di_ib, sizeof(n->di_ib)); 142 n->di_flags = bswap32(o->di_flags); 143 n->di_blocks = bswap32(o->di_blocks); 144 n->di_gen = bswap32(o->di_gen); 145 n->di_uid = bswap32(o->di_uid); 146 n->di_gid = bswap32(o->di_gid); 147 } 148 149 #ifndef __DragonFly__ /* XXX UFS2 */ 150 void 151 ffs_dinode2_swap(struct ufs2_dinode *o, struct ufs2_dinode *n) 152 { 153 n->di_mode = bswap16(o->di_mode); 154 n->di_nlink = bswap16(o->di_nlink); 155 n->di_uid = bswap32(o->di_uid); 156 n->di_gid = bswap32(o->di_gid); 157 n->di_blksize = bswap32(o->di_blksize); 158 n->di_size = bswap64(o->di_size); 159 n->di_blocks = bswap64(o->di_blocks); 160 n->di_atime = bswap64(o->di_atime); 161 n->di_atimensec = bswap32(o->di_atimensec); 162 n->di_mtime = bswap64(o->di_mtime); 163 n->di_mtimensec = bswap32(o->di_mtimensec); 164 n->di_ctime = bswap64(o->di_ctime); 165 n->di_ctimensec = bswap32(o->di_ctimensec); 166 n->di_birthtime = bswap64(o->di_ctime); 167 n->di_birthnsec = bswap32(o->di_ctimensec); 168 n->di_gen = bswap32(o->di_gen); 169 n->di_kernflags = bswap32(o->di_kernflags); 170 n->di_flags = bswap32(o->di_flags); 171 n->di_extsize = bswap32(o->di_extsize); 172 memcpy(n->di_extb, o->di_extb, sizeof(n->di_extb)); 173 memcpy(n->di_db, o->di_db, sizeof(n->di_db)); 174 memcpy(n->di_ib, o->di_ib, sizeof(n->di_ib)); 175 } 176 #endif 177 178 void 179 ffs_csum_swap(struct csum *o, struct csum *n, int size) 180 { 181 size_t i; 182 u_int32_t *oint, *nint; 183 184 oint = (u_int32_t*)o; 185 nint = (u_int32_t*)n; 186 187 for (i = 0; i < size / sizeof(u_int32_t); i++) 188 nint[i] = bswap32(oint[i]); 189 } 190 191 void 192 ffs_csumtotal_swap(struct csum_total *o, struct csum_total *n) 193 { 194 n->cs_ndir = bswap64(o->cs_ndir); 195 n->cs_nbfree = bswap64(o->cs_nbfree); 196 n->cs_nifree = bswap64(o->cs_nifree); 197 n->cs_nffree = bswap64(o->cs_nffree); 198 } 199 200 /* 201 * Note that ffs_cg_swap may be called with o == n. 202 */ 203 void 204 ffs_cg_swap(struct cg *o, struct cg *n, struct fs *fs) 205 { 206 int i; 207 u_int32_t *n32, *o32; 208 u_int16_t *n16, *o16; 209 int32_t btotoff, boff, clustersumoff; 210 211 n->cg_firstfield = bswap32(o->cg_firstfield); 212 n->cg_magic = bswap32(o->cg_magic); 213 n->cg_old_time = bswap32(o->cg_old_time); 214 n->cg_cgx = bswap32(o->cg_cgx); 215 n->cg_old_ncyl = bswap16(o->cg_old_ncyl); 216 n->cg_old_niblk = bswap16(o->cg_old_niblk); 217 n->cg_ndblk = bswap32(o->cg_ndblk); 218 n->cg_cs.cs_ndir = bswap32(o->cg_cs.cs_ndir); 219 n->cg_cs.cs_nbfree = bswap32(o->cg_cs.cs_nbfree); 220 n->cg_cs.cs_nifree = bswap32(o->cg_cs.cs_nifree); 221 n->cg_cs.cs_nffree = bswap32(o->cg_cs.cs_nffree); 222 n->cg_rotor = bswap32(o->cg_rotor); 223 n->cg_frotor = bswap32(o->cg_frotor); 224 n->cg_irotor = bswap32(o->cg_irotor); 225 for (i = 0; i < MAXFRAG; i++) 226 n->cg_frsum[i] = bswap32(o->cg_frsum[i]); 227 228 n->cg_old_btotoff = bswap32(o->cg_old_btotoff); 229 n->cg_old_boff = bswap32(o->cg_old_boff); 230 n->cg_iusedoff = bswap32(o->cg_iusedoff); 231 n->cg_freeoff = bswap32(o->cg_freeoff); 232 n->cg_nextfreeoff = bswap32(o->cg_nextfreeoff); 233 n->cg_clustersumoff = bswap32(o->cg_clustersumoff); 234 n->cg_clusteroff = bswap32(o->cg_clusteroff); 235 n->cg_nclusterblks = bswap32(o->cg_nclusterblks); 236 #ifndef __DragonFly__ 237 n->cg_niblk = bswap32(o->cg_niblk); 238 n->cg_initediblk = bswap32(o->cg_initediblk); 239 n->cg_time = bswap64(o->cg_time); 240 #endif 241 242 #ifndef __DragonFly__ /* XXX UFS2 */ 243 if (fs->fs_magic == FS_UFS2_MAGIC) 244 return; 245 #endif 246 247 if (n->cg_magic == CG_MAGIC) { 248 btotoff = n->cg_old_btotoff; 249 boff = n->cg_old_boff; 250 clustersumoff = n->cg_clustersumoff; 251 } else { 252 btotoff = bswap32(n->cg_old_btotoff); 253 boff = bswap32(n->cg_old_boff); 254 clustersumoff = bswap32(n->cg_clustersumoff); 255 } 256 n32 = (u_int32_t *)((u_int8_t *)n + btotoff); 257 o32 = (u_int32_t *)((u_int8_t *)o + btotoff); 258 n16 = (u_int16_t *)((u_int8_t *)n + boff); 259 o16 = (u_int16_t *)((u_int8_t *)o + boff); 260 261 for (i = 0; i < fs->fs_old_cpg; i++) 262 n32[i] = bswap32(o32[i]); 263 264 for (i = 0; i < fs->fs_old_cpg * fs->fs_old_nrpos; i++) 265 n16[i] = bswap16(o16[i]); 266 267 n32 = (u_int32_t *)((u_int8_t *)n + clustersumoff); 268 o32 = (u_int32_t *)((u_int8_t *)o + clustersumoff); 269 for (i = 1; i < fs->fs_contigsumsize + 1; i++) 270 n32[i] = bswap32(o32[i]); 271 } 272