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v6.9.4
  1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 *   Copyright (C) International Business Machines Corp., 2000-2002
  4 */
  5#ifndef _H_JFS_XTREE
  6#define _H_JFS_XTREE
  7
  8/*
  9 *	jfs_xtree.h: extent allocation descriptor B+-tree manager
 10 */
 11
 12#include "jfs_btree.h"
 13
 14
 15/*
 16 *	extent allocation descriptor (xad)
 17 */
 18typedef struct xad {
 19	__u8 flag;	/* 1: flag */
 20	__u8 rsvrd[2];	/* 2: reserved */
 21	__u8 off1;	/* 1: offset in unit of fsblksize */
 22	__le32 off2;	/* 4: offset in unit of fsblksize */
 23	pxd_t loc;	/* 8: length and address in unit of fsblksize */
 24} xad_t;			/* (16) */
 25
 26#define MAXXLEN		((1 << 24) - 1)
 27
 28#define XTSLOTSIZE	16
 29#define L2XTSLOTSIZE	4
 30
 31/* xad_t field construction */
 32#define XADoffset(xad, offset64)\
 33{\
 34	(xad)->off1 = ((u64)offset64) >> 32;\
 35	(xad)->off2 = __cpu_to_le32((offset64) & 0xffffffff);\
 36}
 37#define XADaddress(xad, address64) PXDaddress(&(xad)->loc, address64)
 38#define XADlength(xad, length32) PXDlength(&(xad)->loc, length32)
 39
 40/* xad_t field extraction */
 41#define offsetXAD(xad)\
 42	( ((s64)((xad)->off1)) << 32 | __le32_to_cpu((xad)->off2))
 43#define addressXAD(xad) addressPXD(&(xad)->loc)
 44#define lengthXAD(xad) lengthPXD(&(xad)->loc)
 45
 46/* xad list */
 47struct xadlist {
 48	s16 maxnxad;
 49	s16 nxad;
 50	xad_t *xad;
 51};
 52
 53/* xad_t flags */
 54#define XAD_NEW		0x01	/* new */
 55#define XAD_EXTENDED	0x02	/* extended */
 56#define XAD_COMPRESSED	0x04	/* compressed with recorded length */
 57#define XAD_NOTRECORDED 0x08	/* allocated but not recorded */
 58#define XAD_COW		0x10	/* copy-on-write */
 59
 60
 61/* possible values for maxentry */
 62#define XTROOTINITSLOT_DIR 6
 63#define XTROOTINITSLOT	10
 64#define XTROOTMAXSLOT	18
 65#define XTPAGEMAXSLOT	256
 66#define XTENTRYSTART	2
 67
 68struct xtheader {
 69	__le64 next;	/* 8: */
 70	__le64 prev;	/* 8: */
 71
 72	u8 flag;	/* 1: */
 73	u8 rsrvd1;	/* 1: */
 74	__le16 nextindex;	/* 2: next index = number of entries */
 75	__le16 maxentry;	/* 2: max number of entries */
 76	__le16 rsrvd2;	/* 2: */
 77
 78	pxd_t self;	/* 8: self */
 79};
 80
 81/*
 82 *	xtree root (in inode):
 83 */
 84typedef union {
 85	struct xtheader header;
 86	xad_t xad[XTROOTMAXSLOT];	/* 16 * maxentry: xad array */
 87} xtroot_t;
 88
 89/*
 90 *	xtree page:
 91 */
 92typedef union {
 93	struct xtheader header;
 94	xad_t xad[XTPAGEMAXSLOT];	/* 16 * maxentry: xad array */
 95} xtpage_t;
 96
 97/*
 98 *	external declaration
 99 */
100extern int xtLookup(struct inode *ip, s64 lstart, s64 llen,
101		    int *pflag, s64 * paddr, int *plen, int flag);
102extern void xtInitRoot(tid_t tid, struct inode *ip);
103extern int xtInsert(tid_t tid, struct inode *ip,
104		    int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag);
105extern int xtExtend(tid_t tid, struct inode *ip, s64 xoff, int xlen,
106		    int flag);
107extern int xtUpdate(tid_t tid, struct inode *ip, struct xad *nxad);
108extern s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int type);
109extern s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size);
110extern int xtAppend(tid_t tid,
111		    struct inode *ip, int xflag, s64 xoff, int maxblocks,
112		    int *xlenp, s64 * xaddrp, int flag);
113#endif				/* !_H_JFS_XTREE */
v6.13.7
  1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 *   Copyright (C) International Business Machines Corp., 2000-2002
  4 */
  5#ifndef _H_JFS_XTREE
  6#define _H_JFS_XTREE
  7
  8/*
  9 *	jfs_xtree.h: extent allocation descriptor B+-tree manager
 10 */
 11
 12#include "jfs_btree.h"
 13
 14
 15/*
 16 *	extent allocation descriptor (xad)
 17 */
 18typedef struct xad {
 19	__u8 flag;	/* 1: flag */
 20	__u8 rsvrd[2];	/* 2: reserved */
 21	__u8 off1;	/* 1: offset in unit of fsblksize */
 22	__le32 off2;	/* 4: offset in unit of fsblksize */
 23	pxd_t loc;	/* 8: length and address in unit of fsblksize */
 24} xad_t;			/* (16) */
 25
 26#define MAXXLEN		((1 << 24) - 1)
 27
 28#define XTSLOTSIZE	16
 29#define L2XTSLOTSIZE	4
 30
 31/* xad_t field construction */
 32#define XADoffset(xad, offset64)\
 33{\
 34	(xad)->off1 = ((u64)offset64) >> 32;\
 35	(xad)->off2 = __cpu_to_le32((offset64) & 0xffffffff);\
 36}
 37#define XADaddress(xad, address64) PXDaddress(&(xad)->loc, address64)
 38#define XADlength(xad, length32) PXDlength(&(xad)->loc, length32)
 39
 40/* xad_t field extraction */
 41#define offsetXAD(xad)\
 42	( ((s64)((xad)->off1)) << 32 | __le32_to_cpu((xad)->off2))
 43#define addressXAD(xad) addressPXD(&(xad)->loc)
 44#define lengthXAD(xad) lengthPXD(&(xad)->loc)
 45
 46/* xad list */
 47struct xadlist {
 48	s16 maxnxad;
 49	s16 nxad;
 50	xad_t *xad;
 51};
 52
 53/* xad_t flags */
 54#define XAD_NEW		0x01	/* new */
 55#define XAD_EXTENDED	0x02	/* extended */
 56#define XAD_COMPRESSED	0x04	/* compressed with recorded length */
 57#define XAD_NOTRECORDED 0x08	/* allocated but not recorded */
 58#define XAD_COW		0x10	/* copy-on-write */
 59
 60
 61/* possible values for maxentry */
 62#define XTROOTINITSLOT_DIR 6
 63#define XTROOTINITSLOT	10
 64#define XTROOTMAXSLOT	18
 65#define XTPAGEMAXSLOT	256
 66#define XTENTRYSTART	2
 67
 68struct xtheader {
 69	__le64 next;	/* 8: */
 70	__le64 prev;	/* 8: */
 71
 72	u8 flag;	/* 1: */
 73	u8 rsrvd1;	/* 1: */
 74	__le16 nextindex;	/* 2: next index = number of entries */
 75	__le16 maxentry;	/* 2: max number of entries */
 76	__le16 rsrvd2;	/* 2: */
 77
 78	pxd_t self;	/* 8: self */
 79};
 80
 81/*
 82 *	xtree root (in inode):
 83 */
 84typedef union {
 85	struct xtheader header;
 86	xad_t xad[XTROOTMAXSLOT];	/* 16 * maxentry: xad array */
 87} xtroot_t;
 88
 89/*
 90 *	xtree page:
 91 */
 92typedef union {
 93	struct xtheader header;
 94	xad_t xad[XTPAGEMAXSLOT];	/* 16 * maxentry: xad array */
 95} xtpage_t;
 96
 97/*
 98 *	external declaration
 99 */
100extern int xtLookup(struct inode *ip, s64 lstart, s64 llen,
101		    int *pflag, s64 * paddr, int *plen, int flag);
102extern void xtInitRoot(tid_t tid, struct inode *ip);
103extern int xtInsert(tid_t tid, struct inode *ip,
104		    int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag);
105extern int xtExtend(tid_t tid, struct inode *ip, s64 xoff, int xlen,
106		    int flag);
107extern int xtUpdate(tid_t tid, struct inode *ip, struct xad *nxad);
108extern s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int type);
109extern s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size);
110extern int xtAppend(tid_t tid,
111		    struct inode *ip, int xflag, s64 xoff, int maxblocks,
112		    int *xlenp, s64 * xaddrp, int flag);
113#endif				/* !_H_JFS_XTREE */