Subversion Repositories shark

Rev

Rev 422 | Blame | Compare with Previous | Last modification | View Log | RSS feed

#ifndef AMIGAFFS_H
#define AMIGAFFS_H

#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/string.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[AFFS_SB(sb)->s_hashsize-1-(blk)])

static inline void
affs_set_blocksize(struct super_block *sb, int size)
{
        sb_set_blocksize(sb, size);
}
static inline struct buffer_head *
affs_bread(struct super_block *sb, int block)
{
        pr_debug("affs_bread: %d\n", block);
        if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(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("affs_getblk: %d\n", block);
        if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(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("affs_getzeroblk: %d\n", block);
        if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
                bh = sb_getblk(sb, block);
                lock_buffer(bh);
                memset(bh->b_data, 0 , sb->s_blocksize);
                set_buffer_uptodate(bh);
                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("affs_getemptyblk: %d\n", block);
        if (block >= AFFS_SB(sb)->s_reserved && block < AFFS_SB(sb)->s_partition_size) {
                bh = sb_getblk(sb, block);
                wait_on_buffer(bh);
                set_buffer_uptodate(bh);
                return bh;
        }
        return NULL;
}
static inline void
affs_brelse(struct buffer_head *bh)
{
        if (bh)
                pr_debug("affs_brelse: %lld\n", (long long) 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_I(inode)->i_link_lock);
}
static inline void
affs_unlock_link(struct inode *inode)
{
        up(&AFFS_I(inode)->i_link_lock);
}
static inline void
affs_lock_dir(struct inode *inode)
{
        down(&AFFS_I(inode)->i_hash_lock);
}
static inline void
affs_unlock_dir(struct inode *inode)
{
        up(&AFFS_I(inode)->i_hash_lock);
}
static inline void
affs_lock_ext(struct inode *inode)
{
        down(&AFFS_I(inode)->i_ext_lock);
}
static inline void
affs_unlock_ext(struct inode *inode)
{
        up(&AFFS_I(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