Viewing file:  amigaffs.h (6.38 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#ifndef AMIGAFFS_H
#define AMIGAFFS_H
#include <linux/types.h>
#include <linux/locks.h>
#include <asm/byteorder.h>
/* AmigaOS allows file names with up to 30 characters length.
* Names longer than that will be silently truncated. If you
* want to disallow this, comment out the following #define.
* Creating filesystem objects with longer names will then
* result in an error (ENAMETOOLONG).
*/
/*#define AFFS_NO_TRUNCATE */
/* Ugly macros make the code more pretty. */
#define GET_END_PTR(st,p,sz) ((st *)((char *)(p)+((sz)-sizeof(st))))
#define AFFS_GET_HASHENTRY(data,hashkey) be32_to_cpu(((struct dir_front *)data)->hashtable[hashkey])
#define AFFS_BLOCK(sb, bh, blk) (AFFS_HEAD(bh)->table[(sb)->u.affs_sb.s_hashsize-1-(blk)])
static inline void
affs_set_blocksize(struct super_block *sb, int size)
{
set_blocksize(sb->s_dev, size);
sb->s_blocksize = size;
}
static inline struct buffer_head *
affs_bread(struct super_block *sb, int block)
{
pr_debug(KERN_DEBUG "affs_bread: %d\n", block);
if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)
return sb_bread(sb, block);
return NULL;
}
static inline struct buffer_head *
affs_getblk(struct super_block *sb, int block)
{
pr_debug(KERN_DEBUG "affs_getblk: %d\n", block);
if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size)
return sb_getblk(sb, block);
return NULL;
}
static inline struct buffer_head *
affs_getzeroblk(struct super_block *sb, int block)
{
struct buffer_head *bh;
pr_debug(KERN_DEBUG "affs_getzeroblk: %d\n", block);
if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {
bh = sb_getblk(sb, block);
lock_buffer(bh);
memset(bh->b_data, 0 , sb->s_blocksize);
mark_buffer_uptodate(bh, 1);
unlock_buffer(bh);
return bh;
}
return NULL;
}
static inline struct buffer_head *
affs_getemptyblk(struct super_block *sb, int block)
{
struct buffer_head *bh;
pr_debug(KERN_DEBUG "affs_getemptyblk: %d\n", block);
if (block >= AFFS_SB->s_reserved && block < AFFS_SB->s_partition_size) {
bh = sb_getblk(sb, block);
wait_on_buffer(bh);
mark_buffer_uptodate(bh, 1);
return bh;
}
return NULL;
}
static inline void
affs_brelse(struct buffer_head *bh)
{
if (bh)
pr_debug(KERN_DEBUG "affs_brelse: %ld\n", bh->b_blocknr);
brelse(bh);
}
static inline void
affs_adjust_checksum(struct buffer_head *bh, u32 val)
{
u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[5]);
((u32 *)bh->b_data)[5] = cpu_to_be32(tmp - val);
}
static inline void
affs_adjust_bitmapchecksum(struct buffer_head *bh, u32 val)
{
u32 tmp = be32_to_cpu(((u32 *)bh->b_data)[0]);
((u32 *)bh->b_data)[0] = cpu_to_be32(tmp - val);
}
static inline void
affs_lock_link(struct inode *inode)
{
down(&AFFS_INODE->i_link_lock);
}
static inline void
affs_unlock_link(struct inode *inode)
{
up(&AFFS_INODE->i_link_lock);
}
static inline void
affs_lock_dir(struct inode *inode)
{
down(&AFFS_INODE->i_hash_lock);
}
static inline void
affs_unlock_dir(struct inode *inode)
{
up(&AFFS_INODE->i_hash_lock);
}
static inline void
affs_lock_ext(struct inode *inode)
{
down(&AFFS_INODE->i_ext_lock);
}
static inline void
affs_unlock_ext(struct inode *inode)
{
up(&AFFS_INODE->i_ext_lock);
}
#ifdef __LITTLE_ENDIAN
#define BO_EXBITS 0x18UL
#elif defined(__BIG_ENDIAN)
#define BO_EXBITS 0x00UL
#else
#error Endianness must be known for affs to work.
#endif
#define FS_OFS 0x444F5300
#define FS_FFS 0x444F5301
#define FS_INTLOFS 0x444F5302
#define FS_INTLFFS 0x444F5303
#define FS_DCOFS 0x444F5304
#define FS_DCFFS 0x444F5305
#define MUFS_FS 0x6d754653 /* 'muFS' */
#define MUFS_OFS 0x6d754600 /* 'muF\0' */
#define MUFS_FFS 0x6d754601 /* 'muF\1' */
#define MUFS_INTLOFS 0x6d754602 /* 'muF\2' */
#define MUFS_INTLFFS 0x6d754603 /* 'muF\3' */
#define MUFS_DCOFS 0x6d754604 /* 'muF\4' */
#define MUFS_DCFFS 0x6d754605 /* 'muF\5' */
#define T_SHORT 2
#define T_LIST 16
#define T_DATA 8
#define ST_LINKFILE -4
#define ST_FILE -3
#define ST_ROOT 1
#define ST_USERDIR 2
#define ST_SOFTLINK 3
#define ST_LINKDIR 4
#define AFFS_ROOT_BMAPS 25
#define AFFS_HEAD(bh) ((struct affs_head *)(bh)->b_data)
#define AFFS_TAIL(sb, bh) ((struct affs_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_tail)))
#define AFFS_ROOT_HEAD(bh) ((struct affs_root_head *)(bh)->b_data)
#define AFFS_ROOT_TAIL(sb, bh) ((struct affs_root_tail *)((bh)->b_data+(sb)->s_blocksize-sizeof(struct affs_root_tail)))
#define AFFS_DATA_HEAD(bh) ((struct affs_data_head *)(bh)->b_data)
#define AFFS_DATA(bh) (((struct affs_data_head *)(bh)->b_data)->data)
struct affs_date {
u32 days;
u32 mins;
u32 ticks;
};
struct affs_short_date {
u16 days;
u16 mins;
u16 ticks;
};
struct affs_root_head {
u32 ptype;
u32 spare1;
u32 spare2;
u32 hash_size;
u32 spare3;
u32 checksum;
u32 hashtable[1];
};
struct affs_root_tail {
u32 bm_flag;
u32 bm_blk[AFFS_ROOT_BMAPS];
u32 bm_ext;
struct affs_date root_change;
u8 disk_name[32];
u32 spare1;
u32 spare2;
struct affs_date disk_change;
struct affs_date disk_create;
u32 spare3;
u32 spare4;
u32 dcache;
u32 stype;
};
struct affs_head {
u32 ptype;
u32 key;
u32 block_count;
u32 spare1;
u32 first_data;
u32 checksum;
u32 table[1];
};
struct affs_tail {
u32 spare1;
u16 uid;
u16 gid;
u32 protect;
u32 size;
u8 comment[92];
struct affs_date change;
u8 name[32];
u32 spare2;
u32 original;
u32 link_chain;
u32 spare[5];
u32 hash_chain;
u32 parent;
u32 extension;
u32 stype;
};
struct slink_front
{
u32 ptype;
u32 key;
u32 spare1[3];
u32 checksum;
u8 symname[1]; /* depends on block size */
};
struct affs_data_head
{
u32 ptype;
u32 key;
u32 sequence;
u32 size;
u32 next;
u32 checksum;
u8 data[1]; /* depends on block size */
};
/* Permission bits */
#define FIBF_OTR_READ 0x8000
#define FIBF_OTR_WRITE 0x4000
#define FIBF_OTR_EXECUTE 0x2000
#define FIBF_OTR_DELETE 0x1000
#define FIBF_GRP_READ 0x0800
#define FIBF_GRP_WRITE 0x0400
#define FIBF_GRP_EXECUTE 0x0200
#define FIBF_GRP_DELETE 0x0100
#define FIBF_HIDDEN 0x0080
#define FIBF_SCRIPT 0x0040
#define FIBF_PURE 0x0020 /* no use under linux */
#define FIBF_ARCHIVED 0x0010 /* never set, always cleared on write */
#define FIBF_NOREAD 0x0008 /* 0 means allowed */
#define FIBF_NOWRITE 0x0004 /* 0 means allowed */
#define FIBF_NOEXECUTE 0x0002 /* 0 means allowed, ignored under linux */
#define FIBF_NODELETE 0x0001 /* 0 means allowed */
#define FIBF_OWNER 0x000F /* Bits pertaining to owner */
#define FIBF_MASK 0xEE0E /* Bits modified by Linux */
#endif
|