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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 */
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 */