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fs/jfs/jfs_types.h
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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: * |
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* basic type/utility definitions |
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* * 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> #include "endian24.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 |
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#define HIGHORDER 0x80000000u /* high order bit on */ #define ONES 0xffffffffu /* all bit on */ |
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/* |
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* physical xd (pxd) */ typedef struct { unsigned len:24; unsigned addr1:8; __le32 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)) #define MAXTREEHEIGHT 8 /* pxd list */ struct pxdlist { s16 maxnpxd; s16 npxd; pxd_t pxd[MAXTREEHEIGHT]; }; /* * data extent descriptor (dxd) */ typedef struct { unsigned flag:8; /* 1: flags */ unsigned rsrvd:24; __le32 size; /* 4: size in byte */ unsigned len:24; /* 3: length in unit of fsblksize */ unsigned addr1:8; /* 1: address in unit of fsblksize */ __le32 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) /* |
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* directory entry argument |
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*/ struct component_name { int namlen; wchar_t *name; }; /* * DASD limit information - stored in directory inode */ struct dasd { |
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u8 thresh; /* Alert Threshold (in percent) */ u8 delta; /* Alert Threshold delta (in percent) */ |
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u8 rsrvd1; |
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u8 limit_hi; /* DASD limit (in logical blocks) */ __le32 limit_lo; /* DASD limit (in logical blocks) */ |
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u8 rsrvd2[3]; |
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u8 used_hi; /* DASD usage (in logical blocks) */ __le32 used_lo; /* DASD usage (in logical blocks) */ |
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}; #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 */ |