sys/ufs/ffs/ffs_bswap.c

   1 /*      $NetBSD: ffs_bswap.c,v 1.39 2015/05/20 18:21:17 riastradh 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 1.39 2015/05/20 18:21:17 riastradh 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/quota.h>
  42 #include <ufs/ufs/ufs_bswap.h>
  43 #include <ufs/ffs/fs.h>
  44 #include <ufs/ffs/ffs_extern.h>
  45
  46 #if !defined(_KERNEL)
  47 #include <stddef.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #define panic(x)        printf("%s\n", (x)), abort()
  52 #endif
  53
  54 void
  55 ffs_sb_swap(struct fs *o, struct fs *n)
  56 {
  57         size_t i;
  58         u_int32_t *o32, *n32;
  59
  60         /*
  61          * In order to avoid a lot of lines, as the first N fields (52)
  62          * of the superblock up to fs_fmod are u_int32_t, we just loop
  63          * here to convert them.
  64          */
  65         o32 = (u_int32_t *)o;
  66         n32 = (u_int32_t *)n;
  67         for (i = 0; i < offsetof(struct fs, fs_fmod) / sizeof(u_int32_t); i++)
  68                 n32[i] = bswap32(o32[i]);
  69
  70         n->fs_swuid = bswap64(o->fs_swuid);
  71         n->fs_cgrotor = bswap32(o->fs_cgrotor); /* Unused */
  72         n->fs_old_cpc = bswap32(o->fs_old_cpc);
  73
  74         /* These fields overlap with a possible location for the
  75          * historic FS_DYNAMICPOSTBLFMT postbl table, and with the
  76          * first half of the historic FS_42POSTBLFMT postbl table.
  77          */
  78         n->fs_maxbsize = bswap32(o->fs_maxbsize);
  79         /* XXX journal */
  80         n->fs_quota_magic = bswap32(o->fs_quota_magic);
  81         for (i = 0; i < MAXQUOTAS; i++)
  82                 n->fs_quotafile[i] = bswap64(o->fs_quotafile[i]);
  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_oldids[0] = bswap16(o->di_oldids[0]);
 123         n->di_oldids[1] = bswap16(o->di_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, sizeof(n->di_db));
 132         memcpy(n->di_ib, o->di_ib, sizeof(n->di_ib));
 133         n->di_flags = bswap32(o->di_flags);
 134         n->di_blocks = bswap32(o->di_blocks);
 135         n->di_gen = bswap32(o->di_gen);
 136         n->di_uid = bswap32(o->di_uid);
 137         n->di_gid = bswap32(o->di_gid);
 138 }
 139
 140 void
 141 ffs_dinode2_swap(struct ufs2_dinode *o, struct ufs2_dinode *n)
 142 {
 143         n->di_mode = bswap16(o->di_mode);
 144         n->di_nlink = bswap16(o->di_nlink);
 145         n->di_uid = bswap32(o->di_uid);
 146         n->di_gid = bswap32(o->di_gid);
 147         n->di_blksize = bswap32(o->di_blksize);
 148         n->di_size = bswap64(o->di_size);
 149         n->di_blocks = bswap64(o->di_blocks);
 150         n->di_atime = bswap64(o->di_atime);
 151         n->di_atimensec = bswap32(o->di_atimensec);
 152         n->di_mtime = bswap64(o->di_mtime);
 153         n->di_mtimensec = bswap32(o->di_mtimensec);
 154         n->di_ctime = bswap64(o->di_ctime);
 155         n->di_ctimensec = bswap32(o->di_ctimensec);
 156         n->di_birthtime = bswap64(o->di_birthtime);
 157         n->di_birthnsec = bswap32(o->di_birthnsec);
 158         n->di_gen = bswap32(o->di_gen);
 159         n->di_kernflags = bswap32(o->di_kernflags);
 160         n->di_flags = bswap32(o->di_flags);
 161         n->di_extsize = bswap32(o->di_extsize);
 162         memcpy(n->di_extb, o->di_extb, sizeof(n->di_extb));
 163         memcpy(n->di_db, o->di_db, sizeof(n->di_db));
 164         memcpy(n->di_ib, o->di_ib, sizeof(n->di_ib));
 165 }
 166
 167 void
 168 ffs_csum_swap(struct csum *o, struct csum *n, int size)
 169 {
 170         size_t i;
 171         u_int32_t *oint, *nint;
 172
 173         oint = (u_int32_t*)o;
 174         nint = (u_int32_t*)n;
 175
 176         for (i = 0; i < size / sizeof(u_int32_t); i++)
 177                 nint[i] = bswap32(oint[i]);
 178 }
 179
 180 void
 181 ffs_csumtotal_swap(struct csum_total *o, struct csum_total *n)
 182 {
 183         n->cs_ndir = bswap64(o->cs_ndir);
 184         n->cs_nbfree = bswap64(o->cs_nbfree);
 185         n->cs_nifree = bswap64(o->cs_nifree);
 186         n->cs_nffree = bswap64(o->cs_nffree);
 187 }
 188
 189 /*
 190  * Note that ffs_cg_swap may be called with o == n.
 191  */
 192 void
 193 ffs_cg_swap(struct cg *o, struct cg *n, struct fs *fs)
 194 {
 195         int i;
 196         u_int32_t *n32, *o32;
 197         u_int16_t *n16, *o16;
 198         int32_t btotoff, boff, clustersumoff;
 199
 200         n->cg_firstfield = bswap32(o->cg_firstfield);
 201         n->cg_magic = bswap32(o->cg_magic);
 202         n->cg_old_time = bswap32(o->cg_old_time);
 203         n->cg_cgx = bswap32(o->cg_cgx);
 204         n->cg_old_ncyl = bswap16(o->cg_old_ncyl);
 205         n->cg_old_niblk = bswap16(o->cg_old_niblk);
 206         n->cg_ndblk = bswap32(o->cg_ndblk);
 207         n->cg_cs.cs_ndir = bswap32(o->cg_cs.cs_ndir);
 208         n->cg_cs.cs_nbfree = bswap32(o->cg_cs.cs_nbfree);
 209         n->cg_cs.cs_nifree = bswap32(o->cg_cs.cs_nifree);
 210         n->cg_cs.cs_nffree = bswap32(o->cg_cs.cs_nffree);
 211         n->cg_rotor = bswap32(o->cg_rotor);
 212         n->cg_frotor = bswap32(o->cg_frotor);
 213         n->cg_irotor = bswap32(o->cg_irotor);
 214         for (i = 0; i < MAXFRAG; i++)
 215                 n->cg_frsum[i] = bswap32(o->cg_frsum[i]);
 216
 217         if ((fs->fs_magic != FS_UFS2_MAGIC) &&
 218                         (fs->fs_old_postblformat == FS_42POSTBLFMT)) { /* old format */
 219                 struct ocg *on, *oo;
 220                 int j;
 221                 on = (struct ocg *)n;
 222                 oo = (struct ocg *)o;
 223
 224                 for (i = 0; i < 32; i++) {
 225                         on->cg_btot[i] = bswap32(oo->cg_btot[i]);
 226                         for (j = 0; j < 8; j++)
 227                                 on->cg_b[i][j] = bswap16(oo->cg_b[i][j]);
 228                 }
 229                 memmove(on->cg_iused, oo->cg_iused, 256);
 230                 on->cg_magic = bswap32(oo->cg_magic);
 231         } else {  /* new format */
 232
 233                 n->cg_old_btotoff = bswap32(o->cg_old_btotoff);
 234                 n->cg_old_boff = bswap32(o->cg_old_boff);
 235                 n->cg_iusedoff = bswap32(o->cg_iusedoff);
 236                 n->cg_freeoff = bswap32(o->cg_freeoff);
 237                 n->cg_nextfreeoff = bswap32(o->cg_nextfreeoff);
 238                 n->cg_clustersumoff = bswap32(o->cg_clustersumoff);
 239                 n->cg_clusteroff = bswap32(o->cg_clusteroff);
 240                 n->cg_nclusterblks = bswap32(o->cg_nclusterblks);
 241                 n->cg_niblk = bswap32(o->cg_niblk);
 242                 n->cg_initediblk = bswap32(o->cg_initediblk);
 243                 n->cg_time = bswap64(o->cg_time);
 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
 255                 n32 = (u_int32_t *)((u_int8_t *)n + clustersumoff);
 256                 o32 = (u_int32_t *)((u_int8_t *)o + clustersumoff);
 257                 for (i = 1; i < fs->fs_contigsumsize + 1; i++)
 258                         n32[i] = bswap32(o32[i]);
 259
 260                 if (fs->fs_magic == FS_UFS2_MAGIC)
 261                         return;
 262
 263                 n32 = (u_int32_t *)((u_int8_t *)n + btotoff);
 264                 o32 = (u_int32_t *)((u_int8_t *)o + btotoff);
 265                 n16 = (u_int16_t *)((u_int8_t *)n + boff);
 266                 o16 = (u_int16_t *)((u_int8_t *)o + boff);
 267
 268                 for (i = 0; i < fs->fs_old_cpg; i++)
 269                         n32[i] = bswap32(o32[i]);
 270
 271                 for (i = 0; i < fs->fs_old_cpg * fs->fs_old_nrpos; i++)
 272                         n16[i] = bswap16(o16[i]);
 273         }
 274 }