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#ifndef AMIGAFFS_H
#define AMIGAFFS_H
#include <asm/byteorder.h>
#include <linux/types.h>
/* 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) htonl(((struct dir_front *)data)->hashtable[hashkey])
#define AFFS_BLOCK(data,ino,blk) ((struct file_front *)data)->blocks[AFFS_I2HSIZE(ino)-1-(blk)]
#define FILE_END(p,i) GET_END_PTR(struct file_end,p,AFFS_I2BSIZE(i))
#define ROOT_END(p,i) GET_END_PTR(struct root_end,p,AFFS_I2BSIZE(i))
#define DIR_END(p,i) GET_END_PTR(struct dir_end,p,AFFS_I2BSIZE(i))
#define LINK_END(p,i) GET_END_PTR(struct hlink_end,p,AFFS_I2BSIZE(i))
#define ROOT_END_S(p,s) GET_END_PTR(struct root_end,p,(s)->s_blocksize)
#define DATA_FRONT(bh) ((struct data_front *)(bh)->b_data)
/* Only for easier debugging if need be */
#define affs_bread bread
#define affs_brelse brelse
#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
struct root_front
{
s32 primary_type;
s32 spare1[2];
s32 hash_size;
s32 spare2;
u32 checksum;
s32 hashtable[0];
};
struct root_end
{
s32 bm_flag;
s32 bm_keys[25];
s32 bm_extend;
struct DateStamp dir_altered;
u8 disk_name[40];
struct DateStamp disk_altered;
struct DateStamp disk_made;
s32 spare1[3];
s32 secondary_type;
};
struct dir_front
{
s32 primary_type;
s32 own_key;
s32 spare1[3];
u32 checksum;
s32 hashtable[0];
};
struct dir_end
{
s32 spare1;
s16 owner_uid;
s16 owner_gid;
u32 protect;
s32 spare2;
u8 comment[92];
struct DateStamp created;
u8 dir_name[32];
s32 spare3[2];
s32 link_chain;
s32 spare4[5];
s32 hash_chain;
s32 parent;
s32 spare5;
s32 secondary_type;
};
struct file_front
{
s32 primary_type;
s32 own_key;
s32 block_count;
s32 unknown1;
s32 first_data;
u32 checksum;
s32 blocks[0];
};
struct file_end
{
s32 spare1;
s16 owner_uid;
s16 owner_gid;
u32 protect;
s32 byte_size;
u8 comment[92];
struct DateStamp created;
u8 file_name[32];
s32 spare2;
s32 original; /* not really in file_end */
s32 link_chain;
s32 spare3[5];
s32 hash_chain;
s32 parent;
s32 extension;
s32 secondary_type;
};
struct hlink_front
{
s32 primary_type;
s32 own_key;
s32 spare1[3];
u32 checksum;
};
struct hlink_end
{
s32 spare1;
s16 owner_uid;
s16 owner_gid;
u32 protect;
u8 comment[92];
struct DateStamp created;
u8 link_name[32];
s32 spare2;
s32 original;
s32 link_chain;
s32 spare3[5];
s32 hash_chain;
s32 parent;
s32 spare4;
s32 secondary_type;
};
struct slink_front
{
s32 primary_type;
s32 own_key;
s32 spare1[3];
s32 checksum;
u8 symname[288]; /* depends on block size */
};
struct data_front
{
s32 primary_type;
s32 header_key;
s32 sequence_number;
s32 data_size;
s32 next_data;
s32 checksum;
u8 data[488]; /* 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_SCRIPT 0x0040
#define FIBF_PURE 0x0020 /* no use under linux */
#define FIBF_ARCHIVE 0x0010 /* never set, always cleared on write */
#define FIBF_READ 0x0008 /* 0 means allowed */
#define FIBF_WRITE 0x0004 /* 0 means allowed */
#define FIBF_EXECUTE 0x0002 /* 0 means allowed, ignored under linux */
#define FIBF_DELETE 0x0001 /* 0 means allowed */
#define FIBF_OWNER 0x000F /* Bits pertaining to owner */
#define AFFS_UMAYWRITE(prot) (((prot) & (FIBF_WRITE|FIBF_DELETE)) == (FIBF_WRITE|FIBF_DELETE))
#define AFFS_UMAYREAD(prot) ((prot) & FIBF_READ)
#define AFFS_UMAYEXECUTE(prot) (((prot) & (FIBF_SCRIPT|FIBF_READ)) == (FIBF_SCRIPT|FIBF_READ))
#define AFFS_GMAYWRITE(prot) (((prot)&(FIBF_GRP_WRITE|FIBF_GRP_DELETE))==\
(FIBF_GRP_WRITE|FIBF_GRP_DELETE))
#define AFFS_GMAYREAD(prot) ((prot) & FIBF_GRP_READ)
#define AFFS_GMAYEXECUTE(prot) (((prot)&(FIBF_SCRIPT|FIBF_GRP_READ))==(FIBF_SCRIPT|FIBF_GRP_READ))
#define AFFS_OMAYWRITE(prot) (((prot)&(FIBF_OTR_WRITE|FIBF_OTR_DELETE))==\
(FIBF_OTR_WRITE|FIBF_OTR_DELETE))
#define AFFS_OMAYREAD(prot) ((prot) & FIBF_OTR_READ)
#define AFFS_OMAYEXECUTE(prot) (((prot)&(FIBF_SCRIPT|FIBF_OTR_READ))==(FIBF_SCRIPT|FIBF_OTR_READ))
#endif
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