LXR linux/fs/jfs/jfs

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *   Copyright (C) International Business Machines Corp., 2000-2004
   4 */
   5#ifndef _H_JFS_TYPES
   6#define _H_JFS_TYPES
   7
   8/*
   9 *      jfs_types.h:
  10 *
  11 * basic type/utility definitions
  12 *
  13 * note: this header file must be the 1st include file
  14 * of JFS include list in all JFS .c file.
  15 */
  16
  17#include <linux/types.h>
  18#include <linux/nls.h>
  19
  20/*
  21 * transaction and lock id's
  22 *
  23 * Don't change these without carefully considering the impact on the
  24 * size and alignment of all of the linelock variants
  25 */
  26typedef u16 tid_t;
  27typedef u16 lid_t;
  28
  29/*
  30 * Almost identical to Linux's timespec, but not quite
  31 */
  32struct timestruc_t {
  33        __le32 tv_sec;
  34        __le32 tv_nsec;
  35};
  36
  37/*
  38 *      handy
  39 */
  40
  41#define LEFTMOSTONE     0x80000000
  42#define HIGHORDER       0x80000000u     /* high order bit on    */
  43#define ONES            0xffffffffu     /* all bit on           */
  44
  45/*
  46 *      physical xd (pxd)
  47 *
  48 *      The leftmost 24 bits of len_addr are the extent length.
  49 *      The rightmost 8 bits of len_addr are the most signficant bits of
  50 *      the extent address
  51 */
  52typedef struct {
  53        __le32 len_addr;
  54        __le32 addr2;
  55} pxd_t;
  56
  57/* xd_t field construction */
  58
  59static inline void PXDlength(pxd_t *pxd, __u32 len)
  60{
  61        pxd->len_addr = (pxd->len_addr & cpu_to_le32(~0xffffff)) |
  62                        cpu_to_le32(len & 0xffffff);
  63}
  64
  65static inline void PXDaddress(pxd_t *pxd, __u64 addr)
  66{
  67        pxd->len_addr = (pxd->len_addr & cpu_to_le32(0xffffff)) |
  68                        cpu_to_le32((addr >> 32)<<24);
  69        pxd->addr2 = cpu_to_le32(addr & 0xffffffff);
  70}
  71
  72/* xd_t field extraction */
  73static inline __u32 lengthPXD(pxd_t *pxd)
  74{
  75        return le32_to_cpu((pxd)->len_addr) & 0xffffff;
  76}
  77
  78static inline __u64 addressPXD(pxd_t *pxd)
  79{
  80        __u64 n = le32_to_cpu(pxd->len_addr) & ~0xffffff;
  81        return (n << 8) + le32_to_cpu(pxd->addr2);
  82}
  83
  84#define MAXTREEHEIGHT 8
  85/* pxd list */
  86struct pxdlist {
  87        s16 maxnpxd;
  88        s16 npxd;
  89        pxd_t pxd[MAXTREEHEIGHT];
  90};
  91
  92
  93/*
  94 *      data extent descriptor (dxd)
  95 */
  96typedef struct {
  97        __u8 flag;      /* 1: flags */
  98        __u8 rsrvd[3];
  99        __le32 size;            /* 4: size in byte */
 100        pxd_t loc;              /* 8: address and length in unit of fsblksize */
 101} dxd_t;                        /* - 16 - */
 102
 103/* dxd_t flags */
 104#define DXD_INDEX       0x80    /* B+-tree index */
 105#define DXD_INLINE      0x40    /* in-line data extent */
 106#define DXD_EXTENT      0x20    /* out-of-line single extent */
 107#define DXD_FILE        0x10    /* out-of-line file (inode) */
 108#define DXD_CORRUPT     0x08    /* Inconsistency detected */
 109
 110/* dxd_t field construction
 111 */
 112#define DXDlength(dxd, len)     PXDlength(&(dxd)->loc, len)
 113#define DXDaddress(dxd, addr)   PXDaddress(&(dxd)->loc, addr)
 114#define lengthDXD(dxd)  lengthPXD(&(dxd)->loc)
 115#define addressDXD(dxd) addressPXD(&(dxd)->loc)
 116#define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32))
 117#define sizeDXD(dxd)    le32_to_cpu((dxd)->size)
 118
 119/*
 120 *      directory entry argument
 121 */
 122struct component_name {
 123        int namlen;
 124        wchar_t *name;
 125};
 126
 127
 128/*
 129 *      DASD limit information - stored in directory inode
 130 */
 131struct dasd {
 132        u8 thresh;              /* Alert Threshold (in percent)         */
 133        u8 delta;               /* Alert Threshold delta (in percent)   */
 134        u8 rsrvd1;
 135        u8 limit_hi;            /* DASD limit (in logical blocks)       */
 136        __le32 limit_lo;        /* DASD limit (in logical blocks)       */
 137        u8 rsrvd2[3];
 138        u8 used_hi;             /* DASD usage (in logical blocks)       */
 139        __le32 used_lo;         /* DASD usage (in logical blocks)       */
 140};
 141
 142#define DASDLIMIT(dasdp) \
 143        (((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo))
 144#define setDASDLIMIT(dasdp, limit)\
 145{\
 146        (dasdp)->limit_hi = ((u64)limit) >> 32;\
 147        (dasdp)->limit_lo = __cpu_to_le32(limit);\
 148}
 149#define DASDUSED(dasdp) \
 150        (((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo))
 151#define setDASDUSED(dasdp, used)\
 152{\
 153        (dasdp)->used_hi = ((u64)used) >> 32;\
 154        (dasdp)->used_lo = __cpu_to_le32(used);\
 155}
 156
 157#endif                          /* !_H_JFS_TYPES */
 158