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
38struct affs_date {
39	__be32 days;
40	__be32 mins;
41	__be32 ticks;
42};
43
44struct affs_short_date {
45	__be16 days;
46	__be16 mins;
47	__be16 ticks;
48};
49
50struct 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
60struct 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
76struct 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
86struct 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
105struct 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
114struct 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