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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/jfs/jfs_xtree.h
2 * Copyright (c) International Business Machines Corp., 2000-2002
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * jfs_xtree.h: extent allocation descriptor B+-tree manager
25 #include "jfs_btree.h"
29 * extent allocation descriptor (xad)
32 unsigned flag
:8; /* 1: flag */
33 unsigned rsvrd
:16; /* 2: reserved */
34 unsigned off1
:8; /* 1: offset in unit of fsblksize */
35 __le32 off2
; /* 4: offset in unit of fsblksize */
36 unsigned len
:24; /* 3: length in unit of fsblksize */
37 unsigned addr1
:8; /* 1: address in unit of fsblksize */
38 __le32 addr2
; /* 4: address in unit of fsblksize */
41 #define MAXXLEN ((1 << 24) - 1)
44 #define L2XTSLOTSIZE 4
46 /* xad_t field construction */
47 #define XADoffset(xad, offset64)\
49 (xad)->off1 = ((u64)offset64) >> 32;\
50 (xad)->off2 = __cpu_to_le32((offset64) & 0xffffffff);\
52 #define XADaddress(xad, address64)\
54 (xad)->addr1 = ((u64)address64) >> 32;\
55 (xad)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
57 #define XADlength(xad, length32) (xad)->len = __cpu_to_le24(length32)
59 /* xad_t field extraction */
60 #define offsetXAD(xad)\
61 ( ((s64)((xad)->off1)) << 32 | __le32_to_cpu((xad)->off2))
62 #define addressXAD(xad)\
63 ( ((s64)((xad)->addr1)) << 32 | __le32_to_cpu((xad)->addr2))
64 #define lengthXAD(xad) __le24_to_cpu((xad)->len)
74 #define XAD_NEW 0x01 /* new */
75 #define XAD_EXTENDED 0x02 /* extended */
76 #define XAD_COMPRESSED 0x04 /* compressed with recorded length */
77 #define XAD_NOTRECORDED 0x08 /* allocated but not recorded */
78 #define XAD_COW 0x10 /* copy-on-write */
81 /* possible values for maxentry */
82 #define XTROOTINITSLOT_DIR 6
83 #define XTROOTINITSLOT 10
84 #define XTROOTMAXSLOT 18
85 #define XTPAGEMAXSLOT 256
86 #define XTENTRYSTART 2
98 __le16 nextindex
; /* 2: next index = number of entries */
99 __le16 maxentry
; /* 2: max number of entries */
100 __le16 rsrvd2
; /* 2: */
102 pxd_t self
; /* 8: self */
105 xad_t xad
[XTROOTMAXSLOT
]; /* 16 * maxentry: xad array */
109 * external declaration
111 extern int xtLookup(struct inode
*ip
, s64 lstart
, s64 llen
,
112 int *pflag
, s64
* paddr
, int *plen
, int flag
);
113 extern int xtLookupList(struct inode
*ip
, struct lxdlist
* lxdlist
,
114 struct xadlist
* xadlist
, int flag
);
115 extern void xtInitRoot(tid_t tid
, struct inode
*ip
);
116 extern int xtInsert(tid_t tid
, struct inode
*ip
,
117 int xflag
, s64 xoff
, int xlen
, s64
* xaddrp
, int flag
);
118 extern int xtExtend(tid_t tid
, struct inode
*ip
, s64 xoff
, int xlen
,
121 extern int xtTailgate(tid_t tid
, struct inode
*ip
,
122 s64 xoff
, int xlen
, s64 xaddr
, int flag
);
124 extern int xtUpdate(tid_t tid
, struct inode
*ip
, struct xad
*nxad
);
125 extern int xtDelete(tid_t tid
, struct inode
*ip
, s64 xoff
, int xlen
,
127 extern s64
xtTruncate(tid_t tid
, struct inode
*ip
, s64 newsize
, int type
);
128 extern s64
xtTruncate_pmap(tid_t tid
, struct inode
*ip
, s64 committed_size
);
129 extern int xtRelocate(tid_t tid
, struct inode
*ip
,
130 xad_t
* oxad
, s64 nxaddr
, int xtype
);
131 extern int xtAppend(tid_t tid
,
132 struct inode
*ip
, int xflag
, s64 xoff
, int maxblocks
,
133 int *xlenp
, s64
* xaddrp
, int flag
);
134 #endif /* !_H_JFS_XTREE */