277 lines
6.4 KiB
C
Executable File
277 lines
6.4 KiB
C
Executable File
#ifndef AMIGAFFS_H
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#define AMIGAFFS_H
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#include <linux/types.h>
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#include <linux/locks.h>
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#include <asm/byteorder.h>
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/* AmigaOS allows file names with up to 30 characters length.
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* Names longer than that will be silently truncated. If you
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* want to disallow this, comment out the following #define.
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* Creating filesystem objects with longer names will then
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* result in an error (ENAMETOOLONG).
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*/
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/*#define AFFS_NO_TRUNCATE */
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/* Ugly macros make the code more pretty. */
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#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
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#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
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#define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[(sb)->u.affs_sb.s_hashsize-1-(blk)])
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static inline void
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affs_set_blocksize(struct super_block *sb, int size)
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{
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set_blocksize(sb->s_dev, size);
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sb->s_blocksize = size;
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}
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static inline struct buffer_head *
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affs_bread(struct super_block *sb, int block)
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{
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pr_debug(KERN_DEBUG "affs_bread: %d\n", block);
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if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)
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return bread(sb->s_dev, block, sb->s_blocksize);
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return NULL;
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}
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static inline struct buffer_head *
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affs_getblk(struct super_block *sb, int block)
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{
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pr_debug(KERN_DEBUG "affs_getblk: %d\n", block);
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if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)
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return getblk(sb->s_dev, block, sb->s_blocksize);
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return NULL;
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}
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static inline struct buffer_head *
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affs_getzeroblk(struct super_block *sb, int block)
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{
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struct buffer_head *bh;
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pr_debug(KERN_DEBUG "affs_getzeroblk: %d\n", block);
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if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {
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bh = getblk(sb->s_dev, block, sb->s_blocksize);
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wait_on_buffer(bh);
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memset(bh->b_data, 0 , sb->s_blocksize);
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mark_buffer_uptodate(bh, 1);
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return bh;
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}
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return NULL;
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}
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static inline struct buffer_head *
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affs_getemptyblk(struct super_block *sb, int block)
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{
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struct buffer_head *bh;
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pr_debug(KERN_DEBUG "affs_getemptyblk: %d\n", block);
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if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {
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bh = getblk(sb->s_dev, block, sb->s_blocksize);
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wait_on_buffer(bh);
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mark_buffer_uptodate(bh, 1);
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return bh;
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}
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return NULL;
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}
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static inline void
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affs_brelse(struct buffer_head *bh)
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{
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if (bh)
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pr_debug(KERN_DEBUG "affs_brelse: %ld\n", bh->b_blocknr);
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brelse(bh);
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}
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static inline void
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affs_adjust_checksum(struct buffer_head *bh, u32 val)
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{
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u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[5]);
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((u32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
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}
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static inline void
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affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
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{
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u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[0]);
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((u32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
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}
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static inline void
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affs_lock_link(struct inode *inode)
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{
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down(&AFFS_INODE->i_link_lock);
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}
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static inline void
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affs_unlock_link(struct inode *inode)
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{
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up(&AFFS_INODE->i_link_lock);
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}
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static inline void
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affs_lock_dir(struct inode *inode)
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{
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down(&AFFS_INODE->i_hash_lock);
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}
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static inline void
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affs_unlock_dir(struct inode *inode)
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{
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up(&AFFS_INODE->i_hash_lock);
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}
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static inline void
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affs_lock_ext(struct inode *inode)
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{
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down(&AFFS_INODE->i_ext_lock);
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}
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static inline void
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affs_unlock_ext(struct inode *inode)
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{
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up(&AFFS_INODE->i_ext_lock);
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}
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#ifdef __LITTLE_ENDIAN
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#define BO_EXBITS 0x18UL
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#elif defined(__BIG_ENDIAN)
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#define BO_EXBITS 0x00UL
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#else
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#error Endianness must be known for affs to work.
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#endif
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#define FS_OFS 0x444F5300
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#define FS_FFS 0x444F5301
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#define FS_INTLOFS 0x444F5302
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#define FS_INTLFFS 0x444F5303
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#define FS_DCOFS 0x444F5304
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#define FS_DCFFS 0x444F5305
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#define MUFS_FS 0x6d754653 /* 'muFS' */
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#define MUFS_OFS 0x6d754600 /* 'muF\0' */
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#define MUFS_FFS 0x6d754601 /* 'muF\1' */
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#define MUFS_INTLOFS 0x6d754602 /* 'muF\2' */
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#define MUFS_INTLFFS 0x6d754603 /* 'muF\3' */
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#define MUFS_DCOFS 0x6d754604 /* 'muF\4' */
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#define MUFS_DCFFS 0x6d754605 /* 'muF\5' */
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#define T_SHORT 2
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#define T_LIST 16
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#define T_DATA 8
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#define ST_LINKFILE -4
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#define ST_FILE -3
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#define ST_ROOT 1
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#define ST_USERDIR 2
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#define ST_SOFTLINK 3
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#define ST_LINKDIR 4
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#define AFFS_ROOT_BMAPS 25
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#define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
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#define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
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#define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
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#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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#define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
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#define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
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struct affs_date {
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u32 days;
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u32 mins;
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u32 ticks;
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};
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struct affs_short_date {
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u16 days;
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u16 mins;
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u16 ticks;
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};
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struct affs_root_head {
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u32 ptype;
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u32 spare1;
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u32 spare2;
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u32 hash_size;
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u32 spare3;
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u32 checksum;
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u32 hashtable[1];
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};
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struct affs_root_tail {
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u32 bm_flag;
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u32 bm_blk[AFFS_ROOT_BMAPS];
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u32 bm_ext;
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struct affs_date root_change;
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u8 disk_name[32];
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u32 spare1;
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u32 spare2;
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struct affs_date disk_change;
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struct affs_date disk_create;
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u32 spare3;
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u32 spare4;
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u32 dcache;
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u32 stype;
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};
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struct affs_head {
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u32 ptype;
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u32 key;
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u32 block_count;
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u32 spare1;
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u32 first_data;
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u32 checksum;
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u32 table[1];
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};
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struct affs_tail {
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u32 spare1;
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u16 uid;
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u16 gid;
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u32 protect;
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u32 size;
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u8 comment[92];
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struct affs_date change;
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u8 name[32];
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u32 spare2;
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u32 original;
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u32 link_chain;
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u32 spare[5];
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u32 hash_chain;
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u32 parent;
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u32 extension;
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u32 stype;
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};
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struct slink_front
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{
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u32 ptype;
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u32 key;
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u32 spare1[3];
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u32 checksum;
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u8 symname[1]; /* depends on block size */
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};
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struct affs_data_head
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{
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u32 ptype;
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u32 key;
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u32 sequence;
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u32 size;
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u32 next;
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u32 checksum;
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u8 data[1]; /* depends on block size */
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};
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/* Permission bits */
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#define FIBF_OTR_READ 0x8000
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#define FIBF_OTR_WRITE 0x4000
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#define FIBF_OTR_EXECUTE 0x2000
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#define FIBF_OTR_DELETE 0x1000
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#define FIBF_GRP_READ 0x0800
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#define FIBF_GRP_WRITE 0x0400
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#define FIBF_GRP_EXECUTE 0x0200
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#define FIBF_GRP_DELETE 0x0100
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#define FIBF_HIDDEN 0x0080
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#define FIBF_SCRIPT 0x0040
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#define FIBF_PURE 0x0020 /* no use under linux */
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#define FIBF_ARCHIVED 0x0010 /* never set, always cleared on write */
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#define FIBF_NOREAD 0x0008 /* 0 means allowed */
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#define FIBF_NOWRITE 0x0004 /* 0 means allowed */
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#define FIBF_NOEXECUTE 0x0002 /* 0 means allowed, ignored under linux */
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#define FIBF_NODELETE 0x0001 /* 0 means allowed */
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#define FIBF_OWNER 0x000F /* Bits pertaining to owner */
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#define FIBF_MASK 0xEE0E /* Bits modified by Linux */
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#endif
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