Annotation of sys/ufs/ext2fs/ext2fs_bswap.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ext2fs_bswap.c,v 1.4 2007/06/17 20:15:25 jasper Exp $ */
2: /* $NetBSD: ext2fs_bswap.c,v 1.6 2000/07/24 00:23:10 mycroft Exp $ */
3:
4: /*
5: * Copyright (c) 1997 Manuel Bouyer.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33: *
34: */
35:
36: #include <sys/types.h>
37: #if defined(_KERNEL)
38: #include <sys/systm.h>
39: #endif
40: #include <ufs/ext2fs/ext2fs.h>
41: #include <ufs/ext2fs/ext2fs_dinode.h>
42:
43: #if !defined(_KERNEL)
44: #include <string.h>
45: #endif
46:
47: /* These functions are only needed if native byte order is not big endian */
48: #if BYTE_ORDER == BIG_ENDIAN
49: void
50: e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new)
51: {
52: /* preserve unused fields */
53: memcpy(new, old, sizeof(struct ext2fs));
54: new->e2fs_icount = swap32(old->e2fs_icount);
55: new->e2fs_bcount = swap32(old->e2fs_bcount);
56: new->e2fs_rbcount = swap32(old->e2fs_rbcount);
57: new->e2fs_fbcount = swap32(old->e2fs_fbcount);
58: new->e2fs_ficount = swap32(old->e2fs_ficount);
59: new->e2fs_first_dblock = swap32(old->e2fs_first_dblock);
60: new->e2fs_log_bsize = swap32(old->e2fs_log_bsize);
61: new->e2fs_fsize = swap32(old->e2fs_fsize);
62: new->e2fs_bpg = swap32(old->e2fs_bpg);
63: new->e2fs_fpg = swap32(old->e2fs_fpg);
64: new->e2fs_ipg = swap32(old->e2fs_ipg);
65: new->e2fs_mtime = swap32(old->e2fs_mtime);
66: new->e2fs_wtime = swap32(old->e2fs_wtime);
67: new->e2fs_mnt_count = swap16(old->e2fs_mnt_count);
68: new->e2fs_max_mnt_count = swap16(old->e2fs_max_mnt_count);
69: new->e2fs_magic = swap16(old->e2fs_magic);
70: new->e2fs_state = swap16(old->e2fs_state);
71: new->e2fs_beh = swap16(old->e2fs_beh);
72: new->e2fs_minrev = swap16(old->e2fs_minrev);
73: new->e2fs_lastfsck = swap32(old->e2fs_lastfsck);
74: new->e2fs_fsckintv = swap32(old->e2fs_fsckintv);
75: new->e2fs_creator = swap32(old->e2fs_creator);
76: new->e2fs_rev = swap32(old->e2fs_rev);
77: new->e2fs_ruid = swap16(old->e2fs_ruid);
78: new->e2fs_rgid = swap16(old->e2fs_rgid);
79: new->e2fs_first_ino = swap32(old->e2fs_first_ino);
80: new->e2fs_inode_size = swap16(old->e2fs_inode_size);
81: new->e2fs_block_group_nr = swap16(old->e2fs_block_group_nr);
82: new->e2fs_features_compat = swap32(old->e2fs_features_compat);
83: new->e2fs_features_incompat = swap32(old->e2fs_features_incompat);
84: new->e2fs_features_rocompat = swap32(old->e2fs_features_rocompat);
85: new->e2fs_algo = swap32(old->e2fs_algo);
86: }
87:
88: void
89: e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size)
90: {
91: int i;
92: for (i=0; i < (size / sizeof(struct ext2_gd)); i++) {
93: new[i].ext2bgd_b_bitmap = swap32(old[i].ext2bgd_b_bitmap);
94: new[i].ext2bgd_i_bitmap = swap32(old[i].ext2bgd_i_bitmap);
95: new[i].ext2bgd_i_tables = swap32(old[i].ext2bgd_i_tables);
96: new[i].ext2bgd_nbfree = swap16(old[i].ext2bgd_nbfree);
97: new[i].ext2bgd_nifree = swap16(old[i].ext2bgd_nifree);
98: new[i].ext2bgd_ndirs = swap16(old[i].ext2bgd_ndirs);
99: }
100: }
101:
102: void
103: e2fs_i_bswap(struct ext2fs_dinode *old, struct ext2fs_dinode *new)
104: {
105: new->e2di_mode = swap16(old->e2di_mode);
106: new->e2di_uid_low = swap16(old->e2di_uid_low);
107: new->e2di_gid_low = swap16(old->e2di_gid_low);
108: new->e2di_uid_high = swap16(old->e2di_uid_high);
109: new->e2di_gid_high = swap16(old->e2di_gid_high);
110: new->e2di_nlink = swap16(old->e2di_nlink);
111: new->e2di_size = swap32(old->e2di_size);
112: new->e2di_atime = swap32(old->e2di_atime);
113: new->e2di_ctime = swap32(old->e2di_ctime);
114: new->e2di_mtime = swap32(old->e2di_mtime);
115: new->e2di_dtime = swap32(old->e2di_dtime);
116: new->e2di_nblock = swap32(old->e2di_nblock);
117: new->e2di_flags = swap32(old->e2di_flags);
118: new->e2di_gen = swap32(old->e2di_gen);
119: new->e2di_facl = swap32(old->e2di_facl);
120: new->e2di_dacl = swap32(old->e2di_dacl);
121: new->e2di_faddr = swap32(old->e2di_faddr);
122: memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
123: (NDADDR+NIADDR) * sizeof(int));
124: }
125: #endif
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