ffs_bswap.c revision 1.29
1 /* $NetBSD: ffs_bswap.c,v 1.29 2005/02/26 22:32:20 perry 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 #if HAVE_NBTOOL_CONFIG_H 34 #include "nbtool_config.h" 35 #endif 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: ffs_bswap.c,v 1.29 2005/02/26 22:32:20 perry Exp $"); 39 40 #include <sys/param.h> 41 #if defined(_KERNEL) 42 #include <sys/systm.h> 43 #endif 44 45 #include <ufs/ufs/dinode.h> 46 #include <ufs/ufs/ufs_bswap.h> 47 #include <ufs/ffs/fs.h> 48 #include <ufs/ffs/ffs_extern.h> 49 50 #if !defined(_KERNEL) 51 #include <stddef.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #define panic(x) printf("%s\n", (x)), abort() 56 #endif 57 58 void 59 ffs_sb_swap(struct fs *o, struct fs *n) 60 { 61 int i; 62 u_int32_t *o32, *n32; 63 64 /* 65 * In order to avoid a lot of lines, as the first N fields (52) 66 * of the superblock up to fs_fmod are u_int32_t, we just loop 67 * here to convert them. 68 */ 69 o32 = (u_int32_t *)o; 70 n32 = (u_int32_t *)n; 71 for (i = 0; i < offsetof(struct fs, fs_fmod) / sizeof(u_int32_t); i++) 72 n32[i] = bswap32(o32[i]); 73 74 n->fs_swuid = bswap64(o->fs_swuid); 75 n->fs_cgrotor = bswap32(o->fs_cgrotor); /* Unused */ 76 n->fs_old_cpc = bswap32(o->fs_old_cpc); 77 78 /* These fields overlap with a possible location for the 79 * historic FS_DYNAMICPOSTBLFMT postbl table, and with the 80 * first half of the historic FS_42POSTBLFMT postbl table. 81 */ 82 n->fs_maxbsize = bswap32(o->fs_maxbsize); 83 n->fs_sblockloc = bswap64(o->fs_sblockloc); 84 ffs_csumtotal_swap(&o->fs_cstotal, &n->fs_cstotal); 85 n->fs_time = bswap64(o->fs_time); 86 n->fs_size = bswap64(o->fs_size); 87 n->fs_dsize = bswap64(o->fs_dsize); 88 n->fs_csaddr = bswap64(o->fs_csaddr); 89 n->fs_pendingblocks = bswap64(o->fs_pendingblocks); 90 n->fs_pendinginodes = bswap32(o->fs_pendinginodes); 91 92 /* These fields overlap with the second half of the 93 * historic FS_42POSTBLFMT postbl table 94 */ 95 for (i = 0; i < FSMAXSNAP; i++) 96 n->fs_snapinum[i] = bswap32(o->fs_snapinum[i]); 97 n->fs_avgfilesize = bswap32(o->fs_avgfilesize); 98 n->fs_avgfpdir = bswap32(o->fs_avgfpdir); 99 /* fs_sparecon[28] - ignore for now */ 100 n->fs_flags = bswap32(o->fs_flags); 101 n->fs_contigsumsize = bswap32(o->fs_contigsumsize); 102 n->fs_maxsymlinklen = bswap32(o->fs_maxsymlinklen); 103 n->fs_old_inodefmt = bswap32(o->fs_old_inodefmt); 104 n->fs_maxfilesize = bswap64(o->fs_maxfilesize); 105 n->fs_qbmask = bswap64(o->fs_qbmask); 106 n->fs_qfmask = bswap64(o->fs_qfmask); 107 n->fs_state = bswap32(o->fs_state); 108 n->fs_old_postblformat = bswap32(o->fs_old_postblformat); 109 n->fs_old_nrpos = bswap32(o->fs_old_nrpos); 110 n->fs_old_postbloff = bswap32(o->fs_old_postbloff); 111 n->fs_old_rotbloff = bswap32(o->fs_old_rotbloff); 112 113 n->fs_magic = bswap32(o->fs_magic); 114 } 115 116 void 117 ffs_dinode1_swap(struct ufs1_dinode *o, struct ufs1_dinode *n) 118 { 119 120 n->di_mode = bswap16(o->di_mode); 121 n->di_nlink = bswap16(o->di_nlink); 122 n->di_u.oldids[0] = bswap16(o->di_u.oldids[0]); 123 n->di_u.oldids[1] = bswap16(o->di_u.oldids[1]); 124 n->di_size = bswap64(o->di_size); 125 n->di_atime = bswap32(o->di_atime); 126 n->di_atimensec = bswap32(o->di_atimensec); 127 n->di_mtime = bswap32(o->di_mtime); 128 n->di_mtimensec = bswap32(o->di_mtimensec); 129 n->di_ctime = bswap32(o->di_ctime); 130 n->di_ctimensec = bswap32(o->di_ctimensec); 131 memcpy(n->di_db, o->di_db, (NDADDR + NIADDR) * sizeof(u_int32_t)); 132 n->di_flags = bswap32(o->di_flags); 133 n->di_blocks = bswap32(o->di_blocks); 134 n->di_gen = bswap32(o->di_gen); 135 n->di_uid = bswap32(o->di_uid); 136 n->di_gid = bswap32(o->di_gid); 137 } 138 139 void 140 ffs_dinode2_swap(struct ufs2_dinode *o, struct ufs2_dinode *n) 141 { 142 n->di_mode = bswap16(o->di_mode); 143 n->di_nlink = bswap16(o->di_nlink); 144 n->di_uid = bswap32(o->di_uid); 145 n->di_gid = bswap32(o->di_gid); 146 n->di_blksize = bswap32(o->di_blksize); 147 n->di_size = bswap64(o->di_size); 148 n->di_blocks = bswap64(o->di_blocks); 149 n->di_atime = bswap64(o->di_atime); 150 n->di_atimensec = bswap32(o->di_atimensec); 151 n->di_mtime = bswap64(o->di_mtime); 152 n->di_mtimensec = bswap32(o->di_mtimensec); 153 n->di_ctime = bswap64(o->di_ctime); 154 n->di_ctimensec = bswap32(o->di_ctimensec); 155 n->di_birthtime = bswap64(o->di_ctime); 156 n->di_birthnsec = bswap32(o->di_ctimensec); 157 n->di_gen = bswap32(o->di_gen); 158 n->di_kernflags = bswap32(o->di_kernflags); 159 n->di_flags = bswap32(o->di_flags); 160 n->di_extsize = bswap32(o->di_extsize); 161 memcpy(n->di_extb, o->di_extb, (NXADDR + NDADDR + NIADDR) * 8); 162 } 163 164 void 165 ffs_csum_swap(struct csum *o, struct csum *n, int size) 166 { 167 int i; 168 u_int32_t *oint, *nint; 169 170 oint = (u_int32_t*)o; 171 nint = (u_int32_t*)n; 172 173 for (i = 0; i < size / sizeof(u_int32_t); i++) 174 nint[i] = bswap32(oint[i]); 175 } 176 177 void 178 ffs_csumtotal_swap(struct csum_total *o, struct csum_total *n) 179 { 180 n->cs_ndir = bswap64(o->cs_ndir); 181 n->cs_nbfree = bswap64(o->cs_nbfree); 182 n->cs_nifree = bswap64(o->cs_nifree); 183 n->cs_nffree = bswap64(o->cs_nffree); 184 } 185 186 /* 187 * Note that ffs_cg_swap may be called with o == n. 188 */ 189 void 190 ffs_cg_swap(struct cg *o, struct cg *n, struct fs *fs) 191 { 192 int i; 193 u_int32_t *n32, *o32; 194 u_int16_t *n16, *o16; 195 int32_t btotoff, boff, clustersumoff; 196 197 n->cg_firstfield = bswap32(o->cg_firstfield); 198 n->cg_magic = bswap32(o->cg_magic); 199 n->cg_old_time = bswap32(o->cg_old_time); 200 n->cg_cgx = bswap32(o->cg_cgx); 201 n->cg_old_ncyl = bswap16(o->cg_old_ncyl); 202 n->cg_old_niblk = bswap16(o->cg_old_niblk); 203 n->cg_ndblk = bswap32(o->cg_ndblk); 204 n->cg_cs.cs_ndir = bswap32(o->cg_cs.cs_ndir); 205 n->cg_cs.cs_nbfree = bswap32(o->cg_cs.cs_nbfree); 206 n->cg_cs.cs_nifree = bswap32(o->cg_cs.cs_nifree); 207 n->cg_cs.cs_nffree = bswap32(o->cg_cs.cs_nffree); 208 n->cg_rotor = bswap32(o->cg_rotor); 209 n->cg_frotor = bswap32(o->cg_frotor); 210 n->cg_irotor = bswap32(o->cg_irotor); 211 for (i = 0; i < MAXFRAG; i++) 212 n->cg_frsum[i] = bswap32(o->cg_frsum[i]); 213 214 if ((fs->fs_magic != FS_UFS2_MAGIC) && 215 (fs->fs_old_postblformat == FS_42POSTBLFMT)) { /* old format */ 216 struct ocg *on, *oo; 217 int j; 218 on = (struct ocg *)n; 219 oo = (struct ocg *)o; 220 221 for (i = 0; i < 32; i++) { 222 on->cg_btot[i] = bswap32(oo->cg_btot[i]); 223 for (j = 0; j < 8; j++) 224 on->cg_b[i][j] = bswap16(oo->cg_b[i][j]); 225 } 226 memmove(on->cg_iused, oo->cg_iused, 256); 227 on->cg_magic = bswap32(oo->cg_magic); 228 } else { /* new format */ 229 230 n->cg_old_btotoff = bswap32(o->cg_old_btotoff); 231 n->cg_old_boff = bswap32(o->cg_old_boff); 232 n->cg_iusedoff = bswap32(o->cg_iusedoff); 233 n->cg_freeoff = bswap32(o->cg_freeoff); 234 n->cg_nextfreeoff = bswap32(o->cg_nextfreeoff); 235 n->cg_clustersumoff = bswap32(o->cg_clustersumoff); 236 n->cg_clusteroff = bswap32(o->cg_clusteroff); 237 n->cg_nclusterblks = bswap32(o->cg_nclusterblks); 238 n->cg_niblk = bswap32(o->cg_niblk); 239 n->cg_initediblk = bswap32(o->cg_initediblk); 240 n->cg_time = bswap64(o->cg_time); 241 242 if (fs->fs_magic == FS_UFS2_MAGIC) 243 return; 244 245 if (n->cg_magic == CG_MAGIC) { 246 btotoff = n->cg_old_btotoff; 247 boff = n->cg_old_boff; 248 clustersumoff = n->cg_clustersumoff; 249 } else { 250 btotoff = bswap32(n->cg_old_btotoff); 251 boff = bswap32(n->cg_old_boff); 252 clustersumoff = bswap32(n->cg_clustersumoff); 253 } 254 n32 = (u_int32_t *)((u_int8_t *)n + btotoff); 255 o32 = (u_int32_t *)((u_int8_t *)o + btotoff); 256 n16 = (u_int16_t *)((u_int8_t *)n + boff); 257 o16 = (u_int16_t *)((u_int8_t *)o + boff); 258 259 for (i = 0; i < fs->fs_old_cpg; i++) 260 n32[i] = bswap32(o32[i]); 261 262 for (i = 0; i < fs->fs_old_cpg * fs->fs_old_nrpos; i++) 263 n16[i] = bswap16(o16[i]); 264 265 n32 = (u_int32_t *)((u_int8_t *)n + clustersumoff); 266 o32 = (u_int32_t *)((u_int8_t *)o + clustersumoff); 267 for (i = 1; i < fs->fs_contigsumsize + 1; i++) 268 n32[i] = bswap32(o32[i]); 269 } 270 } 271
Indexes created Mon Oct 13 05:10:05 GMT 2025