1
2
3
4
5#ifndef _H_JFS_XTREE
6#define _H_JFS_XTREE
7
8
9
10
11
12#include "jfs_btree.h"
13
14
15
16
17
18typedef struct xad {
19 __u8 flag;
20 __u8 rsvrd[2];
21 __u8 off1;
22 __le32 off2;
23 pxd_t loc;
24} xad_t;
25
26#define MAXXLEN ((1 << 24) - 1)
27
28#define XTSLOTSIZE 16
29#define L2XTSLOTSIZE 4
30
31
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
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
47struct xadlist {
48 s16 maxnxad;
49 s16 nxad;
50 xad_t *xad;
51};
52
53
54#define XAD_NEW 0x01
55#define XAD_EXTENDED 0x02
56#define XAD_COMPRESSED 0x04
57#define XAD_NOTRECORDED 0x08
58#define XAD_COW 0x10
59
60
61
62#define XTROOTINITSLOT_DIR 6
63#define XTROOTINITSLOT 10
64#define XTROOTMAXSLOT 18
65#define XTPAGEMAXSLOT 256
66#define XTENTRYSTART 2
67
68
69
70
71typedef union {
72 struct xtheader {
73 __le64 next;
74 __le64 prev;
75
76 u8 flag;
77 u8 rsrvd1;
78 __le16 nextindex;
79 __le16 maxentry;
80 __le16 rsrvd2;
81
82 pxd_t self;
83 } header;
84
85 xad_t xad[XTROOTMAXSLOT];
86} xtpage_t;
87
88
89
90
91extern int xtLookup(struct inode *ip, s64 lstart, s64 llen,
92 int *pflag, s64 * paddr, int *plen, int flag);
93extern void xtInitRoot(tid_t tid, struct inode *ip);
94extern int xtInsert(tid_t tid, struct inode *ip,
95 int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag);
96extern int xtExtend(tid_t tid, struct inode *ip, s64 xoff, int xlen,
97 int flag);
98#ifdef _NOTYET
99extern int xtTailgate(tid_t tid, struct inode *ip,
100 s64 xoff, int xlen, s64 xaddr, int flag);
101#endif
102extern int xtUpdate(tid_t tid, struct inode *ip, struct xad *nxad);
103extern int xtDelete(tid_t tid, struct inode *ip, s64 xoff, int xlen,
104 int flag);
105extern s64 xtTruncate(tid_t tid, struct inode *ip, s64 newsize, int type);
106extern s64 xtTruncate_pmap(tid_t tid, struct inode *ip, s64 committed_size);
107extern int xtRelocate(tid_t tid, struct inode *ip,
108 xad_t * oxad, s64 nxaddr, int xtype);
109extern int xtAppend(tid_t tid,
110 struct inode *ip, int xflag, s64 xoff, int maxblocks,
111 int *xlenp, s64 * xaddrp, int flag);
112#endif
113