The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/fs/jfs/jfs_types.h

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    1 /*
    2  *   Copyright (c) International Business Machines Corp., 2000-2002
    3  *
    4  *   This program is free software;  you can redistribute it and/or modify
    5  *   it under the terms of the GNU General Public License as published by
    6  *   the Free Software Foundation; either version 2 of the License, or
    7  *   (at your option) any later version.
    8  *
    9  *   This program is distributed in the hope that it will be useful,
   10  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
   11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
   12  *   the GNU General Public License for more details.
   13  *
   14  *   You should have received a copy of the GNU General Public License
   15  *   along with this program;  if not, write to the Free Software
   16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   17  */
   18 #ifndef _H_JFS_TYPES
   19 #define _H_JFS_TYPES
   20 
   21 /*
   22  *      jfs_types.h:
   23  *
   24  * basic type/utility  definitions
   25  *
   26  * note: this header file must be the 1st include file
   27  * of JFS include list in all JFS .c file.
   28  */
   29 
   30 #include <linux/types.h>
   31 #include <linux/nls.h>
   32 
   33 /*
   34  * transaction and lock id's
   35  */
   36 typedef uint tid_t;
   37 typedef uint lid_t;
   38 
   39 /*
   40  * Almost identical to Linux's timespec, but not quite
   41  */
   42 struct timestruc_t {
   43         u32 tv_sec;
   44         u32 tv_nsec;
   45 };
   46 
   47 /*
   48  *      handy
   49  */
   50 
   51 #define LEFTMOSTONE     0x80000000
   52 #define HIGHORDER       0x80000000u     /* high order bit on            */
   53 #define ONES            0xffffffffu     /* all bit on                   */
   54 
   55 typedef int boolean_t;
   56 #define TRUE 1
   57 #define FALSE 0
   58 
   59 /*
   60  *      logical xd (lxd)
   61  */
   62 typedef struct {
   63         unsigned len:24;
   64         unsigned off1:8;
   65         u32 off2;
   66 } lxd_t;
   67 
   68 /* lxd_t field construction */
   69 #define LXDlength(lxd, length32)        ( (lxd)->len = length32 )
   70 #define LXDoffset(lxd, offset64)\
   71 {\
   72         (lxd)->off1 = ((s64)offset64) >> 32;\
   73         (lxd)->off2 = (offset64) & 0xffffffff;\
   74 }
   75 
   76 /* lxd_t field extraction */
   77 #define lengthLXD(lxd)  ( (lxd)->len )
   78 #define offsetLXD(lxd)\
   79         ( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 )
   80 
   81 /* lxd list */
   82 struct lxdlist {
   83         s16 maxnlxd;
   84         s16 nlxd;
   85         lxd_t *lxd;
   86 };
   87 
   88 /*
   89  *      physical xd (pxd)
   90  */
   91 typedef struct {
   92         unsigned len:24;
   93         unsigned addr1:8;
   94         u32 addr2;
   95 } pxd_t;
   96 
   97 /* xd_t field construction */
   98 
   99 #define PXDlength(pxd, length32)        ((pxd)->len = __cpu_to_le24(length32))
  100 #define PXDaddress(pxd, address64)\
  101 {\
  102         (pxd)->addr1 = ((s64)address64) >> 32;\
  103         (pxd)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
  104 }
  105 
  106 /* xd_t field extraction */
  107 #define lengthPXD(pxd)  __le24_to_cpu((pxd)->len)
  108 #define addressPXD(pxd)\
  109         ( ((s64)((pxd)->addr1)) << 32 | __le32_to_cpu((pxd)->addr2))
  110 
  111 /* pxd list */
  112 struct pxdlist {
  113         s16 maxnpxd;
  114         s16 npxd;
  115         pxd_t pxd[8];
  116 };
  117 
  118 
  119 /*
  120  *      data extent descriptor (dxd)
  121  */
  122 typedef struct {
  123         unsigned flag:8;        /* 1: flags */
  124         unsigned rsrvd:24;      /* 3: */
  125         u32 size;               /* 4: size in byte */
  126         unsigned len:24;        /* 3: length in unit of fsblksize */
  127         unsigned addr1:8;       /* 1: address in unit of fsblksize */
  128         u32 addr2;              /* 4: address in unit of fsblksize */
  129 } dxd_t;                        /* - 16 - */
  130 
  131 /* dxd_t flags */
  132 #define DXD_INDEX       0x80    /* B+-tree index */
  133 #define DXD_INLINE      0x40    /* in-line data extent */
  134 #define DXD_EXTENT      0x20    /* out-of-line single extent */
  135 #define DXD_FILE        0x10    /* out-of-line file (inode) */
  136 #define DXD_CORRUPT     0x08    /* Inconsistency detected */
  137 
  138 /* dxd_t field construction
  139  *      Conveniently, the PXD macros work for DXD
  140  */
  141 #define DXDlength       PXDlength
  142 #define DXDaddress      PXDaddress
  143 #define lengthDXD       lengthPXD
  144 #define addressDXD      addressPXD
  145 #define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32))
  146 #define sizeDXD(dxd)    le32_to_cpu((dxd)->size)
  147 
  148 /*
  149  *      directory entry argument
  150  */
  151 struct component_name {
  152         int namlen;
  153         wchar_t *name;
  154 };
  155 
  156 
  157 /*
  158  *      DASD limit information - stored in directory inode
  159  */
  160 struct dasd {
  161         u8 thresh;              /* Alert Threshold (in percent) */
  162         u8 delta;               /* Alert Threshold delta (in percent)   */
  163         u8 rsrvd1;
  164         u8 limit_hi;            /* DASD limit (in logical blocks)       */
  165         u32 limit_lo;           /* DASD limit (in logical blocks)       */
  166         u8 rsrvd2[3];
  167         u8 used_hi;             /* DASD usage (in logical blocks)       */
  168         u32 used_lo;            /* DASD usage (in logical blocks)       */
  169 };
  170 
  171 #define DASDLIMIT(dasdp) \
  172         (((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo))
  173 #define setDASDLIMIT(dasdp, limit)\
  174 {\
  175         (dasdp)->limit_hi = ((u64)limit) >> 32;\
  176         (dasdp)->limit_lo = __cpu_to_le32(limit);\
  177 }
  178 #define DASDUSED(dasdp) \
  179         (((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo))
  180 #define setDASDUSED(dasdp, used)\
  181 {\
  182         (dasdp)->used_hi = ((u64)used) >> 32;\
  183         (dasdp)->used_lo = __cpu_to_le32(used);\
  184 }
  185 
  186 #endif                          /* !_H_JFS_TYPES */

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