sys/ufs/ffs/ffs_bswap.c

   1 /*      $NetBSD: ffs_bswap.c,v 1.33 2009/01/18 12:08:51 lukem 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  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  */
  27
  28 #if HAVE_NBTOOL_CONFIG_H
  29 #include "nbtool_config.h"
  30 #endif
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: ffs_bswap.c,v 1.33 2009/01/18 12:08:51 lukem Exp $");
  34
  35 #include <sys/param.h>
  36 #if defined(_KERNEL)
  37 #include <sys/systm.h>
  38 #endif
  39
  40 #include <ufs/ufs/dinode.h>
  41 #include <ufs/ufs/ufs_bswap.h>
  42 #include <ufs/ffs/fs.h>
  43 #include <ufs/ffs/ffs_extern.h>
  44
  45 #if !defined(_KERNEL)
  46 #include <stddef.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #define panic(x)        printf("%s\n", (x)), abort()
  51 #endif
  52
  53 void
  54 ffs_sb_swap(struct fs *o, struct fs *n)
  55 {
  56         size_t i;
  57         u_int32_t *o32, *n32;
  58
  59         /*
  60          * In order to avoid a lot of lines, as the first N fields (52)
  61          * of the superblock up to fs_fmod are u_int32_t, we just loop
  62          * here to convert them.
  63          */
  64         o32 = (u_int32_t *)o;
  65         n32 = (u_int32_t *)n;
  66         for (i = 0; i < offsetof(struct fs, fs_fmod) / sizeof(u_int32_t); i++)
  67                 n32[i] = bswap32(o32[i]);
  68
  69         n->fs_swuid = bswap64(o->fs_swuid);
  70         n->fs_cgrotor = bswap32(o->fs_cgrotor); /* Unused */
  71         n->fs_old_cpc = bswap32(o->fs_old_cpc);
  72
  73         /* These fields overlap with a possible location for the
  74          * historic FS_DYNAMICPOSTBLFMT postbl table, and with the
  75          * first half of the historic FS_42POSTBLFMT postbl table.
  76          */
  77         n->fs_maxbsize = bswap32(o->fs_maxbsize);
  78         n->fs_sblockloc = bswap64(o->fs_sblockloc);
  79         ffs_csumtotal_swap(&o->fs_cstotal, &n->fs_cstotal);
  80         n->fs_time = bswap64(o->fs_time);
  81         n->fs_size = bswap64(o->fs_size);
  82         n->fs_dsize = bswap64(o->fs_dsize);
  83         n->fs_csaddr = bswap64(o->fs_csaddr);
  84         n->fs_pendingblocks = bswap64(o->fs_pendingblocks);
  85         n->fs_pendinginodes = bswap32(o->fs_pendinginodes);
  86
  87         /* These fields overlap with the second half of the
  88          * historic FS_42POSTBLFMT postbl table
  89          */
  90         for (i = 0; i < FSMAXSNAP; i++)
  91                 n->fs_snapinum[i] = bswap32(o->fs_snapinum[i]);
  92         n->fs_avgfilesize = bswap32(o->fs_avgfilesize);
  93         n->fs_avgfpdir = bswap32(o->fs_avgfpdir);
  94         /* fs_sparecon[28] - ignore for now */
  95         n->fs_flags = bswap32(o->fs_flags);
  96         n->fs_contigsumsize = bswap32(o->fs_contigsumsize);
  97         n->fs_maxsymlinklen = bswap32(o->fs_maxsymlinklen);
  98         n->fs_old_inodefmt = bswap32(o->fs_old_inodefmt);
  99         n->fs_maxfilesize = bswap64(o->fs_maxfilesize);
 100         n->fs_qbmask = bswap64(o->fs_qbmask);
 101         n->fs_qfmask = bswap64(o->fs_qfmask);
 102         n->fs_state = bswap32(o->fs_state);
 103         n->fs_old_postblformat = bswap32(o->fs_old_postblformat);
 104         n->fs_old_nrpos = bswap32(o->fs_old_nrpos);
 105         n->fs_old_postbloff = bswap32(o->fs_old_postbloff);
 106         n->fs_old_rotbloff = bswap32(o->fs_old_rotbloff);
 107
 108         n->fs_magic = bswap32(o->fs_magic);
 109 }
 110
 111 void
 112 ffs_dinode1_swap(struct ufs1_dinode *o, struct ufs1_dinode *n)
 113 {
 114
 115         n->di_mode = bswap16(o->di_mode);
 116         n->di_nlink = bswap16(o->di_nlink);
 117         n->di_u.oldids[0] = bswap16(o->di_u.oldids[0]);
 118         n->di_u.oldids[1] = bswap16(o->di_u.oldids[1]);
 119         n->di_size = bswap64(o->di_size);
 120         n->di_atime = bswap32(o->di_atime);
 121         n->di_atimensec = bswap32(o->di_atimensec);
 122         n->di_mtime = bswap32(o->di_mtime);
 123         n->di_mtimensec = bswap32(o->di_mtimensec);
 124         n->di_ctime = bswap32(o->di_ctime);
 125         n->di_ctimensec = bswap32(o->di_ctimensec);
 126         memcpy(n->di_db, o->di_db, (NDADDR + NIADDR) * sizeof(u_int32_t));
 127         n->di_flags = bswap32(o->di_flags);
 128         n->di_blocks = bswap32(o->di_blocks);
 129         n->di_gen = bswap32(o->di_gen);
 130         n->di_uid = bswap32(o->di_uid);
 131         n->di_gid = bswap32(o->di_gid);
 132 }
 133
 134 void
 135 ffs_dinode2_swap(struct ufs2_dinode *o, struct ufs2_dinode *n)
 136 {
 137         n->di_mode = bswap16(o->di_mode);
 138         n->di_nlink = bswap16(o->di_nlink);
 139         n->di_uid = bswap32(o->di_uid);
 140         n->di_gid = bswap32(o->di_gid);
 141         n->di_blksize = bswap32(o->di_blksize);
 142         n->di_size = bswap64(o->di_size);
 143         n->di_blocks = bswap64(o->di_blocks);
 144         n->di_atime = bswap64(o->di_atime);
 145         n->di_atimensec = bswap32(o->di_atimensec);
 146         n->di_mtime = bswap64(o->di_mtime);
 147         n->di_mtimensec = bswap32(o->di_mtimensec);
 148         n->di_ctime = bswap64(o->di_ctime);
 149         n->di_ctimensec = bswap32(o->di_ctimensec);
 150         n->di_birthtime = bswap64(o->di_birthtime);
 151         n->di_birthnsec = bswap32(o->di_birthnsec);
 152         n->di_gen = bswap32(o->di_gen);
 153         n->di_kernflags = bswap32(o->di_kernflags);
 154         n->di_flags = bswap32(o->di_flags);
 155         n->di_extsize = bswap32(o->di_extsize);
 156         memcpy(n->di_extb, o->di_extb, (NXADDR + NDADDR + NIADDR) * 8);
 157 }
 158
 159 void
 160 ffs_csum_swap(struct csum *o, struct csum *n, int size)
 161 {
 162         size_t i;
 163         u_int32_t *oint, *nint;
 164
 165         oint = (u_int32_t*)o;
 166         nint = (u_int32_t*)n;
 167
 168         for (i = 0; i < size / sizeof(u_int32_t); i++)
 169                 nint[i] = bswap32(oint[i]);
 170 }
 171
 172 void
 173 ffs_csumtotal_swap(struct csum_total *o, struct csum_total *n)
 174 {
 175         n->cs_ndir = bswap64(o->cs_ndir);
 176         n->cs_nbfree = bswap64(o->cs_nbfree);
 177         n->cs_nifree = bswap64(o->cs_nifree);
 178         n->cs_nffree = bswap64(o->cs_nffree);
 179 }
 180
 181 /*
 182  * Note that ffs_cg_swap may be called with o == n.
 183  */
 184 void
 185 ffs_cg_swap(struct cg *o, struct cg *n, struct fs *fs)
 186 {
 187         int i;
 188         u_int32_t *n32, *o32;
 189         u_int16_t *n16, *o16;
 190         int32_t btotoff, boff, clustersumoff;
 191
 192         n->cg_firstfield = bswap32(o->cg_firstfield);
 193         n->cg_magic = bswap32(o->cg_magic);
 194         n->cg_old_time = bswap32(o->cg_old_time);
 195         n->cg_cgx = bswap32(o->cg_cgx);
 196         n->cg_old_ncyl = bswap16(o->cg_old_ncyl);
 197         n->cg_old_niblk = bswap16(o->cg_old_niblk);
 198         n->cg_ndblk = bswap32(o->cg_ndblk);
 199         n->cg_cs.cs_ndir = bswap32(o->cg_cs.cs_ndir);
 200         n->cg_cs.cs_nbfree = bswap32(o->cg_cs.cs_nbfree);
 201         n->cg_cs.cs_nifree = bswap32(o->cg_cs.cs_nifree);
 202         n->cg_cs.cs_nffree = bswap32(o->cg_cs.cs_nffree);
 203         n->cg_rotor = bswap32(o->cg_rotor);
 204         n->cg_frotor = bswap32(o->cg_frotor);
 205         n->cg_irotor = bswap32(o->cg_irotor);
 206         for (i = 0; i < MAXFRAG; i++)
 207                 n->cg_frsum[i] = bswap32(o->cg_frsum[i]);
 208
 209         if ((fs->fs_magic != FS_UFS2_MAGIC) &&
 210                         (fs->fs_old_postblformat == FS_42POSTBLFMT)) { /* old format */
 211                 struct ocg *on, *oo;
 212                 int j;
 213                 on = (struct ocg *)n;
 214                 oo = (struct ocg *)o;
 215
 216                 for (i = 0; i < 32; i++) {
 217                         on->cg_btot[i] = bswap32(oo->cg_btot[i]);
 218                         for (j = 0; j < 8; j++)
 219                                 on->cg_b[i][j] = bswap16(oo->cg_b[i][j]);
 220                 }
 221                 memmove(on->cg_iused, oo->cg_iused, 256);
 222                 on->cg_magic = bswap32(oo->cg_magic);
 223         } else {  /* new format */
 224
 225                 n->cg_old_btotoff = bswap32(o->cg_old_btotoff);
 226                 n->cg_old_boff = bswap32(o->cg_old_boff);
 227                 n->cg_iusedoff = bswap32(o->cg_iusedoff);
 228                 n->cg_freeoff = bswap32(o->cg_freeoff);
 229                 n->cg_nextfreeoff = bswap32(o->cg_nextfreeoff);
 230                 n->cg_clustersumoff = bswap32(o->cg_clustersumoff);
 231                 n->cg_clusteroff = bswap32(o->cg_clusteroff);
 232                 n->cg_nclusterblks = bswap32(o->cg_nclusterblks);
 233                 n->cg_niblk = bswap32(o->cg_niblk);
 234                 n->cg_initediblk = bswap32(o->cg_initediblk);
 235                 n->cg_time = bswap64(o->cg_time);
 236
 237                 if (n->cg_magic == CG_MAGIC) {
 238                         btotoff = n->cg_old_btotoff;
 239                         boff = n->cg_old_boff;
 240                         clustersumoff = n->cg_clustersumoff;
 241                 } else {
 242                         btotoff = bswap32(n->cg_old_btotoff);
 243                         boff = bswap32(n->cg_old_boff);
 244                         clustersumoff = bswap32(n->cg_clustersumoff);
 245                 }
 246
 247                 n32 = (u_int32_t *)((u_int8_t *)n + clustersumoff);
 248                 o32 = (u_int32_t *)((u_int8_t *)o + clustersumoff);
 249                 for (i = 1; i < fs->fs_contigsumsize + 1; i++)
 250                         n32[i] = bswap32(o32[i]);
 251
 252                 if (fs->fs_magic == FS_UFS2_MAGIC)
 253                         return;
 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 }