xref: /freebsd/sys/geom/geom_bsd_enc.c (revision 81377a3f17f4a0ed91f9c1956aa3ffa0a41a1c85)
1c72e7314SPoul-Henning Kamp /*-
2c72e7314SPoul-Henning Kamp  * Copyright (c) 2002 Poul-Henning Kamp
3c72e7314SPoul-Henning Kamp  * Copyright (c) 2002 Networks Associates Technology, Inc.
4c72e7314SPoul-Henning Kamp  * All rights reserved.
5c72e7314SPoul-Henning Kamp  *
6c72e7314SPoul-Henning Kamp  * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7c72e7314SPoul-Henning Kamp  * and NAI Labs, the Security Research Division of Network Associates, Inc.
8c72e7314SPoul-Henning Kamp  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9c72e7314SPoul-Henning Kamp  * DARPA CHATS research program.
10c72e7314SPoul-Henning Kamp  *
11c72e7314SPoul-Henning Kamp  * Redistribution and use in source and binary forms, with or without
12c72e7314SPoul-Henning Kamp  * modification, are permitted provided that the following conditions
13c72e7314SPoul-Henning Kamp  * are met:
14c72e7314SPoul-Henning Kamp  * 1. Redistributions of source code must retain the above copyright
15c72e7314SPoul-Henning Kamp  *    notice, this list of conditions and the following disclaimer.
16c72e7314SPoul-Henning Kamp  * 2. Redistributions in binary form must reproduce the above copyright
17c72e7314SPoul-Henning Kamp  *    notice, this list of conditions and the following disclaimer in the
18c72e7314SPoul-Henning Kamp  *    documentation and/or other materials provided with the distribution.
19c72e7314SPoul-Henning Kamp  * 3. The names of the authors may not be used to endorse or promote
20c72e7314SPoul-Henning Kamp  *    products derived from this software without specific prior written
21c72e7314SPoul-Henning Kamp  *    permission.
22c72e7314SPoul-Henning Kamp  *
23c72e7314SPoul-Henning Kamp  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24c72e7314SPoul-Henning Kamp  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25c72e7314SPoul-Henning Kamp  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26c72e7314SPoul-Henning Kamp  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27c72e7314SPoul-Henning Kamp  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28c72e7314SPoul-Henning Kamp  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29c72e7314SPoul-Henning Kamp  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30c72e7314SPoul-Henning Kamp  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31c72e7314SPoul-Henning Kamp  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32c72e7314SPoul-Henning Kamp  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33c72e7314SPoul-Henning Kamp  * SUCH DAMAGE.
34c72e7314SPoul-Henning Kamp  *
35c72e7314SPoul-Henning Kamp  * $FreeBSD$
36c72e7314SPoul-Henning Kamp  *
37c72e7314SPoul-Henning Kamp  * Functions to encode and decode struct disklabel and struct partition into
38c72e7314SPoul-Henning Kamp  * a bytestream of little endianess and correct packing.
39c72e7314SPoul-Henning Kamp  *
40c72e7314SPoul-Henning Kamp  * NB!  This file must be usable both in kernel and userland.
41c72e7314SPoul-Henning Kamp  *
42c72e7314SPoul-Henning Kamp  */
43c72e7314SPoul-Henning Kamp 
44c72e7314SPoul-Henning Kamp #include <sys/types.h>
45c72e7314SPoul-Henning Kamp #include <sys/endian.h>
46c72e7314SPoul-Henning Kamp #include <sys/disklabel.h>
47c72e7314SPoul-Henning Kamp #ifdef _KERNEL
48c72e7314SPoul-Henning Kamp #include <sys/systm.h>
4981377a3fSPoul-Henning Kamp #else
5081377a3fSPoul-Henning Kamp #include <string.h>
51c72e7314SPoul-Henning Kamp #endif
52c72e7314SPoul-Henning Kamp 
53c72e7314SPoul-Henning Kamp void
54c72e7314SPoul-Henning Kamp bsd_partition_le_dec(u_char *ptr, struct partition *d)
55c72e7314SPoul-Henning Kamp {
56c72e7314SPoul-Henning Kamp 	d->p_size = le32dec(ptr + 0);
57c72e7314SPoul-Henning Kamp 	d->p_offset = le32dec(ptr + 4);
58c72e7314SPoul-Henning Kamp 	d->p_fsize = le32dec(ptr + 8);
59c72e7314SPoul-Henning Kamp 	d->p_fstype = ptr[12];
60c72e7314SPoul-Henning Kamp 	d->p_frag = ptr[13];
61c72e7314SPoul-Henning Kamp 	d->p_cpg = le16dec(ptr + 14);
62c72e7314SPoul-Henning Kamp }
63c72e7314SPoul-Henning Kamp 
64c72e7314SPoul-Henning Kamp void
65c72e7314SPoul-Henning Kamp bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d)
66c72e7314SPoul-Henning Kamp {
67c72e7314SPoul-Henning Kamp 	int i;
68c72e7314SPoul-Henning Kamp 
69c72e7314SPoul-Henning Kamp 	d->d_magic = le32dec(ptr + 0);
70c72e7314SPoul-Henning Kamp 	d->d_type = le16dec(ptr + 4);
71c72e7314SPoul-Henning Kamp 	d->d_subtype = le16dec(ptr + 6);
72c72e7314SPoul-Henning Kamp 	bcopy(ptr + 8, d->d_typename, 16);
73c72e7314SPoul-Henning Kamp 	bcopy(ptr + 24, d->d_packname, 16);
74c72e7314SPoul-Henning Kamp 	d->d_secsize = le32dec(ptr + 40);
75c72e7314SPoul-Henning Kamp 	d->d_nsectors = le32dec(ptr + 44);
76c72e7314SPoul-Henning Kamp 	d->d_ntracks = le32dec(ptr + 48);
77c72e7314SPoul-Henning Kamp 	d->d_ncylinders = le32dec(ptr + 52);
78c72e7314SPoul-Henning Kamp 	d->d_secpercyl = le32dec(ptr + 56);
79c72e7314SPoul-Henning Kamp 	d->d_secperunit = le32dec(ptr + 60);
80c72e7314SPoul-Henning Kamp 	d->d_sparespertrack = le16dec(ptr + 64);
81c72e7314SPoul-Henning Kamp 	d->d_sparespercyl = le16dec(ptr + 66);
82c72e7314SPoul-Henning Kamp 	d->d_acylinders = le32dec(ptr + 68);
83c72e7314SPoul-Henning Kamp 	d->d_rpm = le16dec(ptr + 72);
84c72e7314SPoul-Henning Kamp 	d->d_interleave = le16dec(ptr + 74);
85c72e7314SPoul-Henning Kamp 	d->d_trackskew = le16dec(ptr + 76);
86c72e7314SPoul-Henning Kamp 	d->d_cylskew = le16dec(ptr + 78);
87c72e7314SPoul-Henning Kamp 	d->d_headswitch = le32dec(ptr + 80);
88c72e7314SPoul-Henning Kamp 	d->d_trkseek = le32dec(ptr + 84);
89c72e7314SPoul-Henning Kamp 	d->d_flags = le32dec(ptr + 88);
90c72e7314SPoul-Henning Kamp 	d->d_drivedata[0] = le32dec(ptr + 92);
91c72e7314SPoul-Henning Kamp 	d->d_drivedata[1] = le32dec(ptr + 96);
92c72e7314SPoul-Henning Kamp 	d->d_drivedata[2] = le32dec(ptr + 100);
93c72e7314SPoul-Henning Kamp 	d->d_drivedata[3] = le32dec(ptr + 104);
94c72e7314SPoul-Henning Kamp 	d->d_drivedata[4] = le32dec(ptr + 108);
95c72e7314SPoul-Henning Kamp 	d->d_spare[0] = le32dec(ptr + 112);
96c72e7314SPoul-Henning Kamp 	d->d_spare[1] = le32dec(ptr + 116);
97c72e7314SPoul-Henning Kamp 	d->d_spare[2] = le32dec(ptr + 120);
98c72e7314SPoul-Henning Kamp 	d->d_spare[3] = le32dec(ptr + 124);
99c72e7314SPoul-Henning Kamp 	d->d_spare[4] = le32dec(ptr + 128);
100c72e7314SPoul-Henning Kamp 	d->d_magic2 = le32dec(ptr + 132);
101c72e7314SPoul-Henning Kamp 	d->d_checksum = le16dec(ptr + 136);
102c72e7314SPoul-Henning Kamp 	d->d_npartitions = le16dec(ptr + 138);
103c72e7314SPoul-Henning Kamp 	d->d_bbsize = le32dec(ptr + 140);
104c72e7314SPoul-Henning Kamp 	d->d_sbsize = le32dec(ptr + 144);
105c72e7314SPoul-Henning Kamp 	for (i = 0; i < MAXPARTITIONS; i++)
106c72e7314SPoul-Henning Kamp 		bsd_partition_le_dec(ptr + 148 + 16 * i, &d->d_partitions[i]);
107c72e7314SPoul-Henning Kamp }
108c72e7314SPoul-Henning Kamp 
109c72e7314SPoul-Henning Kamp void
110c72e7314SPoul-Henning Kamp bsd_partition_le_enc(u_char *ptr, struct partition *d)
111c72e7314SPoul-Henning Kamp {
112c72e7314SPoul-Henning Kamp 	le32enc(ptr + 0, d->p_size);
113c72e7314SPoul-Henning Kamp 	le32enc(ptr + 4, d->p_offset);
114c72e7314SPoul-Henning Kamp 	le32enc(ptr + 8, d->p_fsize);
115c72e7314SPoul-Henning Kamp 	ptr[12] = d->p_fstype;
116c72e7314SPoul-Henning Kamp 	ptr[13] = d->p_frag;
117c72e7314SPoul-Henning Kamp 	le16enc(ptr + 14, d->p_cpg);
118c72e7314SPoul-Henning Kamp }
119c72e7314SPoul-Henning Kamp 
120c72e7314SPoul-Henning Kamp void
121c72e7314SPoul-Henning Kamp bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d)
122c72e7314SPoul-Henning Kamp {
123c72e7314SPoul-Henning Kamp 	int i;
124c72e7314SPoul-Henning Kamp 
125c72e7314SPoul-Henning Kamp 	le32enc(ptr + 0, d->d_magic);
126c72e7314SPoul-Henning Kamp 	le16enc(ptr + 4, d->d_type);
127c72e7314SPoul-Henning Kamp 	le16enc(ptr + 6, d->d_subtype);
128c72e7314SPoul-Henning Kamp 	bcopy(d->d_typename, ptr + 8, 16);
129c72e7314SPoul-Henning Kamp 	bcopy(d->d_packname, ptr + 24, 16);
130c72e7314SPoul-Henning Kamp 	le32enc(ptr + 40, d->d_secsize);
131c72e7314SPoul-Henning Kamp 	le32enc(ptr + 44, d->d_nsectors);
132c72e7314SPoul-Henning Kamp 	le32enc(ptr + 48, d->d_ntracks);
133c72e7314SPoul-Henning Kamp 	le32enc(ptr + 52, d->d_ncylinders);
134c72e7314SPoul-Henning Kamp 	le32enc(ptr + 56, d->d_secpercyl);
135c72e7314SPoul-Henning Kamp 	le32enc(ptr + 60, d->d_secperunit);
136c72e7314SPoul-Henning Kamp 	le16enc(ptr + 64, d->d_sparespertrack);
137c72e7314SPoul-Henning Kamp 	le16enc(ptr + 66, d->d_sparespercyl);
138c72e7314SPoul-Henning Kamp 	le32enc(ptr + 68, d->d_acylinders);
139c72e7314SPoul-Henning Kamp 	le16enc(ptr + 72, d->d_rpm);
140c72e7314SPoul-Henning Kamp 	le16enc(ptr + 74, d->d_interleave);
141c72e7314SPoul-Henning Kamp 	le16enc(ptr + 76, d->d_trackskew);
142c72e7314SPoul-Henning Kamp 	le16enc(ptr + 78, d->d_cylskew);
143c72e7314SPoul-Henning Kamp 	le32enc(ptr + 80, d->d_headswitch);
144c72e7314SPoul-Henning Kamp 	le32enc(ptr + 84, d->d_trkseek);
145c72e7314SPoul-Henning Kamp 	le32enc(ptr + 88, d->d_flags);
146c72e7314SPoul-Henning Kamp 	le32enc(ptr + 92, d->d_drivedata[0]);
147c72e7314SPoul-Henning Kamp 	le32enc(ptr + 96, d->d_drivedata[1]);
148c72e7314SPoul-Henning Kamp 	le32enc(ptr + 100, d->d_drivedata[2]);
149c72e7314SPoul-Henning Kamp 	le32enc(ptr + 104, d->d_drivedata[3]);
150c72e7314SPoul-Henning Kamp 	le32enc(ptr + 108, d->d_drivedata[4]);
151c72e7314SPoul-Henning Kamp 	le32enc(ptr + 112, d->d_spare[0]);
152c72e7314SPoul-Henning Kamp 	le32enc(ptr + 116, d->d_spare[1]);
153c72e7314SPoul-Henning Kamp 	le32enc(ptr + 120, d->d_spare[2]);
154c72e7314SPoul-Henning Kamp 	le32enc(ptr + 124, d->d_spare[3]);
155c72e7314SPoul-Henning Kamp 	le32enc(ptr + 128, d->d_spare[4]);
156c72e7314SPoul-Henning Kamp 	le32enc(ptr + 132, d->d_magic2);
157c72e7314SPoul-Henning Kamp 	le16enc(ptr + 136, d->d_checksum);
158c72e7314SPoul-Henning Kamp 	le16enc(ptr + 138, d->d_npartitions);
159c72e7314SPoul-Henning Kamp 	le32enc(ptr + 140, d->d_bbsize);
160c72e7314SPoul-Henning Kamp 	le32enc(ptr + 144, d->d_sbsize);
161c72e7314SPoul-Henning Kamp 	for (i = 0; i < MAXPARTITIONS; i++)
162c72e7314SPoul-Henning Kamp 		bsd_partition_le_enc(ptr + 148 + 16 * i, &d->d_partitions[i]);
163c72e7314SPoul-Henning Kamp }
164