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/*

 *   Copyright (c) International Business Machines Corp., 2000-2002

 *

 *   This program is free software;  you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation; either version 2 of the License, or

 *   (at your option) any later version.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See

 *   the GNU General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program;  if not, write to the Free Software

 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 */

#ifndef _H_JFS_TYPES

#define _H_JFS_TYPES

/*

 *      jfs_types.h:

 *

 * basic type/utility  definitions

 *

 * note: this header file must be the 1st include file

 * of JFS include list in all JFS .c file.

 */

#include <linux/types.h>

#include <linux/nls.h>

/*

 * transaction and lock id's

 */

typedef uint tid_t;

typedef uint lid_t;

/*

 * Almost identical to Linux's timespec, but not quite

 */

struct timestruc_t {

        u32 tv_sec;

        u32 tv_nsec;

};

/*

 *      handy

 */

#define LEFTMOSTONE     0x80000000

#define HIGHORDER       0x80000000u     /* high order bit on            */

#define ONES            0xffffffffu     /* all bit on                   */

typedef int boolean_t;

#define TRUE 1

#define FALSE 0

/*

 *      logical xd (lxd)

 */

typedef struct {

        unsigned len:24;

        unsigned off1:8;

        u32 off2;

} lxd_t;

/* lxd_t field construction */

#define LXDlength(lxd, length32)        ( (lxd)->len = length32 )

#define LXDoffset(lxd, offset64)\

{\

        (lxd)->off1 = ((s64)offset64) >> 32;\

        (lxd)->off2 = (offset64) & 0xffffffff;\

}

/* lxd_t field extraction */

#define lengthLXD(lxd)  ( (lxd)->len )

#define offsetLXD(lxd)\

        ( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 )

/* lxd list */

struct lxdlist {

        s16 maxnlxd;

        s16 nlxd;

        lxd_t *lxd;

};

/*

 *      physical xd (pxd)

 */

typedef struct {

        unsigned len:24;

        unsigned addr1:8;

        u32 addr2;

} pxd_t;

/* xd_t field construction */

#define PXDlength(pxd, length32)        ((pxd)->len = __cpu_to_le24(length32))

#define PXDaddress(pxd, address64)\

{\

        (pxd)->addr1 = ((s64)address64) >> 32;\

        (pxd)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\

}

/* xd_t field extraction */

#define lengthPXD(pxd)  __le24_to_cpu((pxd)->len)

#define addressPXD(pxd)\

        ( ((s64)((pxd)->addr1)) << 32 | __le32_to_cpu((pxd)->addr2))

/* pxd list */

struct pxdlist {

        s16 maxnpxd;

        s16 npxd;

        pxd_t pxd[8];

};

/*

 *      data extent descriptor (dxd)

 */

typedef struct {

        unsigned flag:8;        /* 1: flags */

        unsigned rsrvd:24;      /* 3: */

        u32 size;               /* 4: size in byte */

        unsigned len:24;        /* 3: length in unit of fsblksize */

        unsigned addr1:8;       /* 1: address in unit of fsblksize */

        u32 addr2;              /* 4: address in unit of fsblksize */

} dxd_t;                        /* - 16 - */

/* dxd_t flags */

#define DXD_INDEX       0x80    /* B+-tree index */

#define DXD_INLINE      0x40    /* in-line data extent */

#define DXD_EXTENT      0x20    /* out-of-line single extent */

#define DXD_FILE        0x10    /* out-of-line file (inode) */

#define DXD_CORRUPT     0x08    /* Inconsistency detected */

/* dxd_t field construction

 *      Conveniently, the PXD macros work for DXD

 */

#define DXDlength       PXDlength

#define DXDaddress      PXDaddress

#define lengthDXD       lengthPXD

#define addressDXD      addressPXD

#define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32))

#define sizeDXD(dxd)    le32_to_cpu((dxd)->size)

/*

 *      directory entry argument

 */

struct component_name {

        int namlen;

        wchar_t *name;

};

/*

 *      DASD limit information - stored in directory inode

 */

struct dasd {

        u8 thresh;              /* Alert Threshold (in percent) */

        u8 delta;               /* Alert Threshold delta (in percent)   */

        u8 rsrvd1;

        u8 limit_hi;            /* DASD limit (in logical blocks)       */

        u32 limit_lo;           /* DASD limit (in logical blocks)       */

        u8 rsrvd2[3];

        u8 used_hi;             /* DASD usage (in logical blocks)       */

        u32 used_lo;            /* DASD usage (in logical blocks)       */

};

#define DASDLIMIT(dasdp) \

        (((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo))

#define setDASDLIMIT(dasdp, limit)\

{\

        (dasdp)->limit_hi = ((u64)limit) >> 32;\

        (dasdp)->limit_lo = __cpu_to_le32(limit);\

}

#define DASDUSED(dasdp) \

        (((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo))

#define setDASDUSED(dasdp, used)\

{\

        (dasdp)->used_hi = ((u64)used) >> 32;\

        (dasdp)->used_lo = __cpu_to_le32(used);\

}

#endif                          /* !_H_JFS_TYPES */