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