1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* $OpenBSD: ext2fs_bswap.c,v 1.1 2010/02/17 19:26:48 otto Exp $ */
/* $NetBSD: ext2fs_bswap.c,v 1.6 2000/07/24 00:23:10 mycroft Exp $ */
/*
* Copyright (c) 1997 Manuel Bouyer.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <sys/types.h>
#if defined(_KERNEL)
#include <sys/systm.h>
#endif
#include <ufs/ext2fs/ext2fs.h>
#include <ufs/ext2fs/ext2fs_dinode.h>
#if !defined(_KERNEL)
#include <string.h>
#endif
/* These functions are only needed if native byte order is not big endian */
#if BYTE_ORDER == BIG_ENDIAN
void
e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new)
{
/* preserve unused fields */
memcpy(new, old, sizeof(struct ext2fs));
new->e2fs_icount = swap32(old->e2fs_icount);
new->e2fs_bcount = swap32(old->e2fs_bcount);
new->e2fs_rbcount = swap32(old->e2fs_rbcount);
new->e2fs_fbcount = swap32(old->e2fs_fbcount);
new->e2fs_ficount = swap32(old->e2fs_ficount);
new->e2fs_first_dblock = swap32(old->e2fs_first_dblock);
new->e2fs_log_bsize = swap32(old->e2fs_log_bsize);
new->e2fs_fsize = swap32(old->e2fs_fsize);
new->e2fs_bpg = swap32(old->e2fs_bpg);
new->e2fs_fpg = swap32(old->e2fs_fpg);
new->e2fs_ipg = swap32(old->e2fs_ipg);
new->e2fs_mtime = swap32(old->e2fs_mtime);
new->e2fs_wtime = swap32(old->e2fs_wtime);
new->e2fs_mnt_count = swap16(old->e2fs_mnt_count);
new->e2fs_max_mnt_count = swap16(old->e2fs_max_mnt_count);
new->e2fs_magic = swap16(old->e2fs_magic);
new->e2fs_state = swap16(old->e2fs_state);
new->e2fs_beh = swap16(old->e2fs_beh);
new->e2fs_minrev = swap16(old->e2fs_minrev);
new->e2fs_lastfsck = swap32(old->e2fs_lastfsck);
new->e2fs_fsckintv = swap32(old->e2fs_fsckintv);
new->e2fs_creator = swap32(old->e2fs_creator);
new->e2fs_rev = swap32(old->e2fs_rev);
new->e2fs_ruid = swap16(old->e2fs_ruid);
new->e2fs_rgid = swap16(old->e2fs_rgid);
new->e2fs_first_ino = swap32(old->e2fs_first_ino);
new->e2fs_inode_size = swap16(old->e2fs_inode_size);
new->e2fs_block_group_nr = swap16(old->e2fs_block_group_nr);
new->e2fs_features_compat = swap32(old->e2fs_features_compat);
new->e2fs_features_incompat = swap32(old->e2fs_features_incompat);
new->e2fs_features_rocompat = swap32(old->e2fs_features_rocompat);
new->e2fs_algo = swap32(old->e2fs_algo);
}
void
e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size)
{
int i;
for (i=0; i < (size / sizeof(struct ext2_gd)); i++) {
new[i].ext2bgd_b_bitmap = swap32(old[i].ext2bgd_b_bitmap);
new[i].ext2bgd_i_bitmap = swap32(old[i].ext2bgd_i_bitmap);
new[i].ext2bgd_i_tables = swap32(old[i].ext2bgd_i_tables);
new[i].ext2bgd_nbfree = swap16(old[i].ext2bgd_nbfree);
new[i].ext2bgd_nifree = swap16(old[i].ext2bgd_nifree);
new[i].ext2bgd_ndirs = swap16(old[i].ext2bgd_ndirs);
}
}
void
e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new)
{
new->e2di_mode = swap16(old->e2di_mode);
new->e2di_uid_low = swap16(old->e2di_uid_low);
new->e2di_gid_low = swap16(old->e2di_gid_low);
new->e2di_uid_high = swap16(old->e2di_uid_high);
new->e2di_gid_high = swap16(old->e2di_gid_high);
new->e2di_nlink = swap16(old->e2di_nlink);
new->e2di_size = swap32(old->e2di_size);
new->e2di_atime = swap32(old->e2di_atime);
new->e2di_ctime = swap32(old->e2di_ctime);
new->e2di_mtime = swap32(old->e2di_mtime);
new->e2di_dtime = swap32(old->e2di_dtime);
new->e2di_nblock = swap32(old->e2di_nblock);
new->e2di_flags = swap32(old->e2di_flags);
new->e2di_gen = swap32(old->e2di_gen);
new->e2di_facl = swap32(old->e2di_facl);
new->e2di_dacl = swap32(old->e2di_dacl);
new->e2di_faddr = swap32(old->e2di_faddr);
memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
(NDADDR+NIADDR) * sizeof(int));
}
#endif
|
