patch-2.4.20 linux-2.4.20/fs/jfs/jfs_types.h

• Lines: 187
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/fs/jfs/jfs_types.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/fs/jfs/jfs_types.h linux-2.4.20/fs/jfs/jfs_types.h
@@ -0,0 +1,186 @@
+/*
+ *   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 */