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
ffs_sb_swap(struct fs * o,struct fs * n)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
ffs_dinode1_swap(struct ufs1_dinode * o,struct ufs1_dinode * n)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
ffs_dinode2_swap(struct ufs2_dinode * o,struct ufs2_dinode * n)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
ffs_csum_swap(struct csum * o,struct csum * n,int size)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
ffs_csumtotal_swap(struct csum_total * o,struct csum_total * n)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
ffs_cg_swap(struct cg * o,struct cg * n,struct fs * fs)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