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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef AMIGAFFS_H |
| 2 | #define AMIGAFFS_H |
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| 3 | |||
| 4 | #include <linux/types.h> |
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| 5 | #include <linux/buffer_head.h> |
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| 6 | #include <linux/string.h> |
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| 7 | #include <asm/byteorder.h> |
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| 8 | |||
| 9 | /* AmigaOS allows file names with up to 30 characters length. |
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| 10 | * Names longer than that will be silently truncated. If you |
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| 11 | * want to disallow this, comment out the following #define. |
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| 12 | * Creating filesystem objects with longer names will then |
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| 13 | * result in an error (ENAMETOOLONG). |
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| 14 | */ |
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| 15 | /*#define AFFS_NO_TRUNCATE */ |
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| 16 | |||
| 17 | /* Ugly macros make the code more pretty. */ |
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| 18 | |||
| 19 | #define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st)))) |
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| 20 | #define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey]) |
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| 21 | #define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[AFFS_SB(sb)->s_hashsize-1-(blk)]) |
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| 22 | |||
| 23 | static inline void |
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| 24 | affs_set_blocksize(struct super_block *sb, int size) |
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| 25 | { |
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| 26 | sb_set_blocksize(sb, size); |
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| 27 | } |
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| 28 | static inline struct buffer_head * |
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| 29 | affs_bread(struct super_block *sb, int block) |
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| 30 | { |
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| 31 | pr_debug("affs_bread: %d\n", block); |
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| 32 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) |
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| 33 | return sb_bread(sb, block); |
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| 34 | return NULL; |
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| 35 | } |
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| 36 | static inline struct buffer_head * |
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| 37 | affs_getblk(struct super_block *sb, int block) |
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| 38 | { |
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| 39 | pr_debug("affs_getblk: %d\n", block); |
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| 40 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) |
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| 41 | return sb_getblk(sb, block); |
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| 42 | return NULL; |
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| 43 | } |
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| 44 | static inline struct buffer_head * |
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| 45 | affs_getzeroblk(struct super_block *sb, int block) |
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| 46 | { |
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| 47 | struct buffer_head *bh; |
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| 48 | pr_debug("affs_getzeroblk: %d\n", block); |
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| 49 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) { |
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| 50 | bh = sb_getblk(sb, block); |
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| 51 | lock_buffer(bh); |
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| 52 | memset(bh->b_data, 0 , sb->s_blocksize); |
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| 53 | set_buffer_uptodate(bh); |
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| 54 | unlock_buffer(bh); |
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| 55 | return bh; |
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| 56 | } |
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| 57 | return NULL; |
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| 58 | } |
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| 59 | static inline struct buffer_head * |
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| 60 | affs_getemptyblk(struct super_block *sb, int block) |
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| 61 | { |
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| 62 | struct buffer_head *bh; |
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| 63 | pr_debug("affs_getemptyblk: %d\n", block); |
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| 64 | if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) { |
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| 65 | bh = sb_getblk(sb, block); |
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| 66 | wait_on_buffer(bh); |
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| 67 | set_buffer_uptodate(bh); |
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| 68 | return bh; |
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| 69 | } |
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| 70 | return NULL; |
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| 71 | } |
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| 72 | static inline void |
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| 73 | affs_brelse(struct buffer_head *bh) |
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| 74 | { |
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| 75 | if (bh) |
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| 76 | pr_debug("affs_brelse: %lld\n", (long long) bh->b_blocknr); |
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| 77 | brelse(bh); |
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| 78 | } |
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| 79 | |||
| 80 | static inline void |
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| 81 | affs_adjust_checksum(struct buffer_head *bh, u32 val) |
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| 82 | { |
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| 83 | u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[5]); |
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| 84 | ((u32 *)bh->b_data)[5] = cpu_to_be32(tmp - val); |
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| 85 | } |
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| 86 | static inline void |
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| 87 | affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val) |
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| 88 | { |
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| 89 | u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[0]); |
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| 90 | ((u32 *)bh->b_data)[0] = cpu_to_be32(tmp - val); |
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| 91 | } |
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| 92 | |||
| 93 | static inline void |
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| 94 | affs_lock_link(struct inode *inode) |
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| 95 | { |
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| 96 | down(&AFFS_I(inode)->i_link_lock); |
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| 97 | } |
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| 98 | static inline void |
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| 99 | affs_unlock_link(struct inode *inode) |
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| 100 | { |
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| 101 | up(&AFFS_I(inode)->i_link_lock); |
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| 102 | } |
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| 103 | static inline void |
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| 104 | affs_lock_dir(struct inode *inode) |
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| 105 | { |
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| 106 | down(&AFFS_I(inode)->i_hash_lock); |
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| 107 | } |
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| 108 | static inline void |
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| 109 | affs_unlock_dir(struct inode *inode) |
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| 110 | { |
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| 111 | up(&AFFS_I(inode)->i_hash_lock); |
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| 112 | } |
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| 113 | static inline void |
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| 114 | affs_lock_ext(struct inode *inode) |
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| 115 | { |
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| 116 | down(&AFFS_I(inode)->i_ext_lock); |
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| 117 | } |
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| 118 | static inline void |
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| 119 | affs_unlock_ext(struct inode *inode) |
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| 120 | { |
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| 121 | up(&AFFS_I(inode)->i_ext_lock); |
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| 122 | } |
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| 123 | |||
| 124 | #ifdef __LITTLE_ENDIAN |
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| 125 | #define BO_EXBITS 0x18UL |
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| 126 | #elif defined(__BIG_ENDIAN) |
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| 127 | #define BO_EXBITS 0x00UL |
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| 128 | #else |
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| 129 | #error Endianness must be known for affs to work. |
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| 130 | #endif |
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| 131 | |||
| 132 | #define FS_OFS 0x444F5300 |
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| 133 | #define FS_FFS 0x444F5301 |
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| 134 | #define FS_INTLOFS 0x444F5302 |
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| 135 | #define FS_INTLFFS 0x444F5303 |
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| 136 | #define FS_DCOFS 0x444F5304 |
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| 137 | #define FS_DCFFS 0x444F5305 |
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| 138 | #define MUFS_FS 0x6d754653 /* 'muFS' */ |
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| 139 | #define MUFS_OFS 0x6d754600 /* 'muF\0' */ |
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| 140 | #define MUFS_FFS 0x6d754601 /* 'muF\1' */ |
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| 141 | #define MUFS_INTLOFS 0x6d754602 /* 'muF\2' */ |
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| 142 | #define MUFS_INTLFFS 0x6d754603 /* 'muF\3' */ |
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| 143 | #define MUFS_DCOFS 0x6d754604 /* 'muF\4' */ |
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| 144 | #define MUFS_DCFFS 0x6d754605 /* 'muF\5' */ |
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| 145 | |||
| 146 | #define T_SHORT 2 |
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| 147 | #define T_LIST 16 |
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| 148 | #define T_DATA 8 |
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| 149 | |||
| 150 | #define ST_LINKFILE -4 |
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| 151 | #define ST_FILE -3 |
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| 152 | #define ST_ROOT 1 |
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| 153 | #define ST_USERDIR 2 |
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| 154 | #define ST_SOFTLINK 3 |
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| 155 | #define ST_LINKDIR 4 |
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| 156 | |||
| 157 | #define AFFS_ROOT_BMAPS 25 |
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| 158 | |||
| 159 | #define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data) |
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| 160 | #define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail))) |
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| 161 | #define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data) |
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| 162 | #define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail))) |
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| 163 | #define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data) |
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| 164 | #define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data) |
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| 165 | |||
| 166 | struct affs_date { |
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| 167 | u32 days; |
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| 168 | u32 mins; |
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| 169 | u32 ticks; |
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| 170 | }; |
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| 171 | |||
| 172 | struct affs_short_date { |
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| 173 | u16 days; |
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| 174 | u16 mins; |
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| 175 | u16 ticks; |
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| 176 | }; |
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| 177 | |||
| 178 | struct affs_root_head { |
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| 179 | u32 ptype; |
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| 180 | u32 spare1; |
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| 181 | u32 spare2; |
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| 182 | u32 hash_size; |
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| 183 | u32 spare3; |
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| 184 | u32 checksum; |
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| 185 | u32 hashtable[1]; |
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| 186 | }; |
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| 187 | |||
| 188 | struct affs_root_tail { |
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| 189 | u32 bm_flag; |
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| 190 | u32 bm_blk[AFFS_ROOT_BMAPS]; |
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| 191 | u32 bm_ext; |
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| 192 | struct affs_date root_change; |
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| 193 | u8 disk_name[32]; |
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| 194 | u32 spare1; |
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| 195 | u32 spare2; |
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| 196 | struct affs_date disk_change; |
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| 197 | struct affs_date disk_create; |
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| 198 | u32 spare3; |
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| 199 | u32 spare4; |
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| 200 | u32 dcache; |
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| 201 | u32 stype; |
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| 202 | }; |
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| 203 | |||
| 204 | struct affs_head { |
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| 205 | u32 ptype; |
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| 206 | u32 key; |
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| 207 | u32 block_count; |
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| 208 | u32 spare1; |
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| 209 | u32 first_data; |
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| 210 | u32 checksum; |
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| 211 | u32 table[1]; |
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| 212 | }; |
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| 213 | |||
| 214 | struct affs_tail { |
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| 215 | u32 spare1; |
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| 216 | u16 uid; |
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| 217 | u16 gid; |
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| 218 | u32 protect; |
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| 219 | u32 size; |
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| 220 | u8 comment[92]; |
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| 221 | struct affs_date change; |
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| 222 | u8 name[32]; |
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| 223 | u32 spare2; |
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| 224 | u32 original; |
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| 225 | u32 link_chain; |
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| 226 | u32 spare[5]; |
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| 227 | u32 hash_chain; |
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| 228 | u32 parent; |
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| 229 | u32 extension; |
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| 230 | u32 stype; |
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| 231 | }; |
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| 232 | |||
| 233 | struct slink_front |
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| 234 | { |
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| 235 | u32 ptype; |
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| 236 | u32 key; |
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| 237 | u32 spare1[3]; |
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| 238 | u32 checksum; |
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| 239 | u8 symname[1]; /* depends on block size */ |
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| 240 | }; |
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| 241 | |||
| 242 | struct affs_data_head |
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| 243 | { |
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| 244 | u32 ptype; |
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| 245 | u32 key; |
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| 246 | u32 sequence; |
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| 247 | u32 size; |
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| 248 | u32 next; |
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| 249 | u32 checksum; |
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| 250 | u8 data[1]; /* depends on block size */ |
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| 251 | }; |
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| 252 | |||
| 253 | /* Permission bits */ |
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| 254 | |||
| 255 | #define FIBF_OTR_READ 0x8000 |
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| 256 | #define FIBF_OTR_WRITE 0x4000 |
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| 257 | #define FIBF_OTR_EXECUTE 0x2000 |
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| 258 | #define FIBF_OTR_DELETE 0x1000 |
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| 259 | #define FIBF_GRP_READ 0x0800 |
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| 260 | #define FIBF_GRP_WRITE 0x0400 |
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| 261 | #define FIBF_GRP_EXECUTE 0x0200 |
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| 262 | #define FIBF_GRP_DELETE 0x0100 |
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| 263 | |||
| 264 | #define FIBF_HIDDEN 0x0080 |
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| 265 | #define FIBF_SCRIPT 0x0040 |
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| 266 | #define FIBF_PURE 0x0020 /* no use under linux */ |
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| 267 | #define FIBF_ARCHIVED 0x0010 /* never set, always cleared on write */ |
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| 268 | #define FIBF_NOREAD 0x0008 /* 0 means allowed */ |
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| 269 | #define FIBF_NOWRITE 0x0004 /* 0 means allowed */ |
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| 270 | #define FIBF_NOEXECUTE 0x0002 /* 0 means allowed, ignored under linux */ |
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| 271 | #define FIBF_NODELETE 0x0001 /* 0 means allowed */ |
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| 272 | |||
| 273 | #define FIBF_OWNER 0x000F /* Bits pertaining to owner */ |
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| 274 | #define FIBF_MASK 0xEE0E /* Bits modified by Linux */ |
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| 275 | |||
| 276 | #endif |