1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef AMIGAFFS_H
3 #define AMIGAFFS_H
4 
5 #include <linux/types.h>
6 #include <asm/byteorder.h>
7 
8 #define FS_OFS		0x444F5300
9 #define FS_FFS		0x444F5301
10 #define FS_INTLOFS	0x444F5302
11 #define FS_INTLFFS	0x444F5303
12 #define FS_DCOFS	0x444F5304
13 #define FS_DCFFS	0x444F5305
14 #define MUFS_FS		0x6d754653   /* 'muFS' */
15 #define MUFS_OFS	0x6d754600   /* 'muF\0' */
16 #define MUFS_FFS	0x6d754601   /* 'muF\1' */
17 #define MUFS_INTLOFS	0x6d754602   /* 'muF\2' */
18 #define MUFS_INTLFFS	0x6d754603   /* 'muF\3' */
19 #define MUFS_DCOFS	0x6d754604   /* 'muF\4' */
20 #define MUFS_DCFFS	0x6d754605   /* 'muF\5' */
21 
22 #define T_SHORT		2
23 #define T_LIST		16
24 #define T_DATA		8
25 
26 #define ST_LINKFILE	-4
27 #define ST_FILE		-3
28 #define ST_ROOT		1
29 #define ST_USERDIR	2
30 #define ST_SOFTLINK	3
31 #define ST_LINKDIR	4
32 
33 #define AFFS_ROOT_BMAPS		25
34 
35 /* Seconds since Amiga epoch of 1978/01/01 to UNIX */
36 #define AFFS_EPOCH_DELTA ((8 * 365 + 2) * 86400LL)
37 
38 struct affs_date {
39 	__be32 days;
40 	__be32 mins;
41 	__be32 ticks;
42 };
43 
44 struct affs_short_date {
45 	__be16 days;
46 	__be16 mins;
47 	__be16 ticks;
48 };
49 
50 struct affs_root_head {
51 	__be32 ptype;
52 	__be32 spare1;
53 	__be32 spare2;
54 	__be32 hash_size;
55 	__be32 spare3;
56 	__be32 checksum;
57 	__be32 hashtable[1];
58 };
59 
60 struct affs_root_tail {
61 	__be32 bm_flag;
62 	__be32 bm_blk[AFFS_ROOT_BMAPS];
63 	__be32 bm_ext;
64 	struct affs_date root_change;
65 	u8 disk_name[32];
66 	__be32 spare1;
67 	__be32 spare2;
68 	struct affs_date disk_change;
69 	struct affs_date disk_create;
70 	__be32 spare3;
71 	__be32 spare4;
72 	__be32 dcache;
73 	__be32 stype;
74 };
75 
76 struct affs_head {
77 	__be32 ptype;
78 	__be32 key;
79 	__be32 block_count;
80 	__be32 spare1;
81 	__be32 first_data;
82 	__be32 checksum;
83 	__be32 table[1];
84 };
85 
86 struct affs_tail {
87 	__be32 spare1;
88 	__be16 uid;
89 	__be16 gid;
90 	__be32 protect;
91 	__be32 size;
92 	u8 comment[92];
93 	struct affs_date change;
94 	u8 name[32];
95 	__be32 spare2;
96 	__be32 original;
97 	__be32 link_chain;
98 	__be32 spare[5];
99 	__be32 hash_chain;
100 	__be32 parent;
101 	__be32 extension;
102 	__be32 stype;
103 };
104 
105 struct slink_front
106 {
107 	__be32 ptype;
108 	__be32 key;
109 	__be32 spare1[3];
110 	__be32 checksum;
111 	u8 symname[1];	/* depends on block size */
112 };
113 
114 struct affs_data_head
115 {
116 	__be32 ptype;
117 	__be32 key;
118 	__be32 sequence;
119 	__be32 size;
120 	__be32 next;
121 	__be32 checksum;
122 	u8 data[1];	/* depends on block size */
123 };
124 
125 /* Permission bits */
126 
127 #define FIBF_OTR_READ		0x8000
128 #define FIBF_OTR_WRITE		0x4000
129 #define FIBF_OTR_EXECUTE	0x2000
130 #define FIBF_OTR_DELETE		0x1000
131 #define FIBF_GRP_READ		0x0800
132 #define FIBF_GRP_WRITE		0x0400
133 #define FIBF_GRP_EXECUTE	0x0200
134 #define FIBF_GRP_DELETE		0x0100
135 
136 #define FIBF_HIDDEN		0x0080
137 #define FIBF_SCRIPT		0x0040
138 #define FIBF_PURE		0x0020		/* no use under linux */
139 #define FIBF_ARCHIVED		0x0010		/* never set, always cleared on write */
140 #define FIBF_NOREAD		0x0008		/* 0 means allowed */
141 #define FIBF_NOWRITE		0x0004		/* 0 means allowed */
142 #define FIBF_NOEXECUTE		0x0002		/* 0 means allowed, ignored under linux */
143 #define FIBF_NODELETE		0x0001		/* 0 means allowed */
144 
145 #define FIBF_OWNER		0x000F		/* Bits pertaining to owner */
146 #define FIBF_MASK		0xEE0E		/* Bits modified by Linux */
147 
148 #endif
149