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/*
* Copyright (C) International Business Machines Corp., 2000-2004
*
* 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
*
* Don't change these without carefully considering the impact on the
* size and alignment of all of the linelock variants
*/
typedef u16 tid_t;
typedef u16 lid_t;
/*
* Almost identical to Linux's timespec, but not quite
*/
struct timestruc_t {
__le32 tv_sec;
__le32 tv_nsec;
};
/*
* handy
*/
#define LEFTMOSTONE 0x80000000
#define HIGHORDER 0x80000000u /* high order bit on */
#define ONES 0xffffffffu /* all bit on */
/*
* physical xd (pxd)
*
* The leftmost 24 bits of len_addr are the extent length.
* The rightmost 8 bits of len_addr are the most signficant bits of
* the extent address
*/
typedef struct {
__le32 len_addr;
__le32 addr2;
} pxd_t;
/* xd_t field construction */
static inline void PXDlength(pxd_t *pxd, __u32 len)
{
pxd->len_addr = (pxd->len_addr & cpu_to_le32(~0xffffff)) |
cpu_to_le32(len & 0xffffff);
}
static inline void PXDaddress(pxd_t *pxd, __u64 addr)
{
pxd->len_addr = (pxd->len_addr & cpu_to_le32(0xffffff)) |
cpu_to_le32((addr >> 32)<<24);
pxd->addr2 = cpu_to_le32(addr & 0xffffffff);
}
/* xd_t field extraction */
static inline __u32 lengthPXD(pxd_t *pxd)
{
return le32_to_cpu((pxd)->len_addr) & 0xffffff;
}
static inline __u64 addressPXD(pxd_t *pxd)
{
__u64 n = le32_to_cpu(pxd->len_addr) & ~0xffffff;
return (n << 8) + le32_to_cpu(pxd->addr2);
}
#define MAXTREEHEIGHT 8
/* pxd list */
struct pxdlist {
s16 maxnpxd;
s16 npxd;
pxd_t pxd[MAXTREEHEIGHT];
};
/*
* data extent descriptor (dxd)
*/
typedef struct {
__u8 flag; /* 1: flags */
__u8 rsrvd[3];
__le32 size; /* 4: size in byte */
pxd_t loc; /* 8: address and length 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
*/
#define DXDlength(dxd, len) PXDlength(&(dxd)->loc, len)
#define DXDaddress(dxd, addr) PXDaddress(&(dxd)->loc, addr)
#define lengthDXD(dxd) lengthPXD(&(dxd)->loc)
#define addressDXD(dxd) addressPXD(&(dxd)->loc)
#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) */
__le32 limit_lo; /* DASD limit (in logical blocks) */
u8 rsrvd2[3];
u8 used_hi; /* DASD usage (in logical blocks) */
__le32 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 */
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