1 /* $NetBSD: ffs_bswap.c,v 1.1 2021/05/27 06:54:44 mrg 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 /*
29 * This copy is a minimal version for libsa and it's ufs.c. The unused
30 * functions are removed, and additional swapping is performed on the
31 * di_extb, di_db, and di_ib arrays.
32 */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: ffs_bswap.c,v 1.1 2021/05/27 06:54:44 mrg Exp $");
36
37 #include <sys/param.h>
38 #include <lib/libkern/libkern.h>
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 static void
libsa_ffs_csumtotal_swap(const struct csum_total * o,struct csum_total * n)47 libsa_ffs_csumtotal_swap(const struct csum_total *o, struct csum_total *n)
48 {
49 n->cs_ndir = bswap64(o->cs_ndir);
50 n->cs_nbfree = bswap64(o->cs_nbfree);
51 n->cs_nifree = bswap64(o->cs_nifree);
52 n->cs_nffree = bswap64(o->cs_nffree);
53 }
54
55 void
ffs_sb_swap(const struct fs * o,struct fs * n)56 ffs_sb_swap(const struct fs *o, struct fs *n)
57 {
58 size_t i;
59 const u_int32_t *o32;
60 u_int32_t *n32;
61
62 /*
63 * In order to avoid a lot of lines, as the first N fields (52)
64 * of the superblock up to fs_fmod are u_int32_t, we just loop
65 * here to convert them.
66 */
67 o32 = (const u_int32_t *)o;
68 n32 = (u_int32_t *)n;
69 for (i = 0; i < offsetof(struct fs, fs_fmod) / sizeof(u_int32_t); i++)
70 n32[i] = bswap32(o32[i]);
71
72 n->fs_swuid = bswap64(o->fs_swuid);
73 n->fs_cgrotor = bswap32(o->fs_cgrotor); /* Unused */
74 n->fs_old_cpc = bswap32(o->fs_old_cpc);
75
76 /* These fields overlap with a possible location for the
77 * historic FS_DYNAMICPOSTBLFMT postbl table, and with the
78 * first half of the historic FS_42POSTBLFMT postbl table.
79 */
80 n->fs_maxbsize = bswap32(o->fs_maxbsize);
81 /* XXX journal */
82 n->fs_quota_magic = bswap32(o->fs_quota_magic);
83 for (i = 0; i < MAXQUOTAS; i++)
84 n->fs_quotafile[i] = bswap64(o->fs_quotafile[i]);
85 n->fs_sblockloc = bswap64(o->fs_sblockloc);
86 libsa_ffs_csumtotal_swap(&o->fs_cstotal, &n->fs_cstotal);
87 n->fs_time = bswap64(o->fs_time);
88 n->fs_size = bswap64(o->fs_size);
89 n->fs_dsize = bswap64(o->fs_dsize);
90 n->fs_csaddr = bswap64(o->fs_csaddr);
91 n->fs_pendingblocks = bswap64(o->fs_pendingblocks);
92 n->fs_pendinginodes = bswap32(o->fs_pendinginodes);
93
94 /* These fields overlap with the second half of the
95 * historic FS_42POSTBLFMT postbl table
96 */
97 for (i = 0; i < FSMAXSNAP; i++)
98 n->fs_snapinum[i] = bswap32(o->fs_snapinum[i]);
99 n->fs_avgfilesize = bswap32(o->fs_avgfilesize);
100 n->fs_avgfpdir = bswap32(o->fs_avgfpdir);
101 /* fs_sparecon[28] - ignore for now */
102 n->fs_flags = bswap32(o->fs_flags);
103 n->fs_contigsumsize = bswap32(o->fs_contigsumsize);
104 n->fs_maxsymlinklen = bswap32(o->fs_maxsymlinklen);
105 n->fs_old_inodefmt = bswap32(o->fs_old_inodefmt);
106 n->fs_maxfilesize = bswap64(o->fs_maxfilesize);
107 n->fs_qbmask = bswap64(o->fs_qbmask);
108 n->fs_qfmask = bswap64(o->fs_qfmask);
109 n->fs_state = bswap32(o->fs_state);
110 n->fs_old_postblformat = bswap32(o->fs_old_postblformat);
111 n->fs_old_nrpos = bswap32(o->fs_old_nrpos);
112 n->fs_old_postbloff = bswap32(o->fs_old_postbloff);
113 n->fs_old_rotbloff = bswap32(o->fs_old_rotbloff);
114
115 n->fs_magic = bswap32(o->fs_magic);
116 }
117
118 void
ffs_dinode1_swap(struct ufs1_dinode * o,struct ufs1_dinode * n)119 ffs_dinode1_swap(struct ufs1_dinode *o, struct ufs1_dinode *n)
120 {
121 size_t i;
122
123 n->di_mode = bswap16(o->di_mode);
124 n->di_nlink = bswap16(o->di_nlink);
125 n->di_oldids[0] = bswap16(o->di_oldids[0]);
126 n->di_oldids[1] = bswap16(o->di_oldids[1]);
127 n->di_size = bswap64(o->di_size);
128 n->di_atime = bswap32(o->di_atime);
129 n->di_atimensec = bswap32(o->di_atimensec);
130 n->di_mtime = bswap32(o->di_mtime);
131 n->di_mtimensec = bswap32(o->di_mtimensec);
132 n->di_ctime = bswap32(o->di_ctime);
133 n->di_ctimensec = bswap32(o->di_ctimensec);
134 /* Swap these here, unlike kernel version .*/
135 for (i = 0; i < UFS_NDADDR; i++)
136 n->di_db[i] = bswap32(o->di_db[i]);
137 for (i = 0; i < UFS_NIADDR; i++)
138 n->di_ib[i] = bswap32(o->di_ib[i]);
139 n->di_flags = bswap32(o->di_flags);
140 n->di_blocks = bswap32(o->di_blocks);
141 n->di_gen = bswap32(o->di_gen);
142 n->di_uid = bswap32(o->di_uid);
143 n->di_gid = bswap32(o->di_gid);
144 }
145
146 void
ffs_dinode2_swap(struct ufs2_dinode * o,struct ufs2_dinode * n)147 ffs_dinode2_swap(struct ufs2_dinode *o, struct ufs2_dinode *n)
148 {
149 size_t i;
150
151 n->di_mode = bswap16(o->di_mode);
152 n->di_nlink = bswap16(o->di_nlink);
153 n->di_uid = bswap32(o->di_uid);
154 n->di_gid = bswap32(o->di_gid);
155 n->di_blksize = bswap32(o->di_blksize);
156 n->di_size = bswap64(o->di_size);
157 n->di_blocks = bswap64(o->di_blocks);
158 n->di_atime = bswap64(o->di_atime);
159 n->di_atimensec = bswap32(o->di_atimensec);
160 n->di_mtime = bswap64(o->di_mtime);
161 n->di_mtimensec = bswap32(o->di_mtimensec);
162 n->di_ctime = bswap64(o->di_ctime);
163 n->di_ctimensec = bswap32(o->di_ctimensec);
164 n->di_birthtime = bswap64(o->di_birthtime);
165 n->di_birthnsec = bswap32(o->di_birthnsec);
166 n->di_gen = bswap32(o->di_gen);
167 n->di_kernflags = bswap32(o->di_kernflags);
168 n->di_flags = bswap32(o->di_flags);
169 n->di_extsize = bswap32(o->di_extsize);
170 /* Swap these here, unlike kernel version .*/
171 for (i = 0; i < UFS_NXADDR; i++)
172 n->di_extb[i] = bswap64(o->di_extb[i]);
173 for (i = 0; i < UFS_NDADDR; i++)
174 n->di_db[i] = bswap64(o->di_db[i]);
175 for (i = 0; i < UFS_NIADDR; i++)
176 n->di_ib[i] = bswap64(o->di_ib[i]);
177 }
178