tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) International Business Machines Corp., 2000-2004
3 *
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.
8 *
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.
13 *
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
17 */
18#ifndef _H_JFS_TYPES
19#define _H_JFS_TYPES
20
21/*
22 * jfs_types.h:
23 *
24 * basic type/utility definitions
25 *
26 * note: this header file must be the 1st include file
27 * of JFS include list in all JFS .c file.
28 */
29
30#include <linux/types.h>
31#include <linux/nls.h>
32
33#include "endian24.h"
34
35/*
36 * transaction and lock id's
37 *
38 * Don't change these without carefully considering the impact on the
39 * size and alignment of all of the linelock variants
40 */
41typedef u16 tid_t;
42typedef u16 lid_t;
43
44/*
45 * Almost identical to Linux's timespec, but not quite
46 */
47struct timestruc_t {
48 __le32 tv_sec;
49 __le32 tv_nsec;
50};
51
52/*
53 * handy
54 */
55
56#define LEFTMOSTONE 0x80000000
57#define HIGHORDER 0x80000000u /* high order bit on */
58#define ONES 0xffffffffu /* all bit on */
59
60typedef int boolean_t;
61#define TRUE 1
62#define FALSE 0
63
64/*
65 * logical xd (lxd)
66 */
67typedef struct {
68 unsigned len:24;
69 unsigned off1:8;
70 u32 off2;
71} lxd_t;
72
73/* lxd_t field construction */
74#define LXDlength(lxd, length32) ( (lxd)->len = length32 )
75#define LXDoffset(lxd, offset64)\
76{\
77 (lxd)->off1 = ((s64)offset64) >> 32;\
78 (lxd)->off2 = (offset64) & 0xffffffff;\
79}
80
81/* lxd_t field extraction */
82#define lengthLXD(lxd) ( (lxd)->len )
83#define offsetLXD(lxd)\
84 ( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 )
85
86/* lxd list */
87struct lxdlist {
88 s16 maxnlxd;
89 s16 nlxd;
90 lxd_t *lxd;
91};
92
93/*
94 * physical xd (pxd)
95 */
96typedef struct {
97 unsigned len:24;
98 unsigned addr1:8;
99 __le32 addr2;
100} pxd_t;
101
102/* xd_t field construction */
103
104#define PXDlength(pxd, length32) ((pxd)->len = __cpu_to_le24(length32))
105#define PXDaddress(pxd, address64)\
106{\
107 (pxd)->addr1 = ((s64)address64) >> 32;\
108 (pxd)->addr2 = __cpu_to_le32((address64) & 0xffffffff);\
109}
110
111/* xd_t field extraction */
112#define lengthPXD(pxd) __le24_to_cpu((pxd)->len)
113#define addressPXD(pxd)\
114 ( ((s64)((pxd)->addr1)) << 32 | __le32_to_cpu((pxd)->addr2))
115
116#define MAXTREEHEIGHT 8
117/* pxd list */
118struct pxdlist {
119 s16 maxnpxd;
120 s16 npxd;
121 pxd_t pxd[MAXTREEHEIGHT];
122};
123
124
125/*
126 * data extent descriptor (dxd)
127 */
128typedef struct {
129 unsigned flag:8; /* 1: flags */
130 unsigned rsrvd:24;
131 __le32 size; /* 4: size in byte */
132 unsigned len:24; /* 3: length in unit of fsblksize */
133 unsigned addr1:8; /* 1: address in unit of fsblksize */
134 __le32 addr2; /* 4: address in unit of fsblksize */
135} dxd_t; /* - 16 - */
136
137/* dxd_t flags */
138#define DXD_INDEX 0x80 /* B+-tree index */
139#define DXD_INLINE 0x40 /* in-line data extent */
140#define DXD_EXTENT 0x20 /* out-of-line single extent */
141#define DXD_FILE 0x10 /* out-of-line file (inode) */
142#define DXD_CORRUPT 0x08 /* Inconsistency detected */
143
144/* dxd_t field construction
145 * Conveniently, the PXD macros work for DXD
146 */
147#define DXDlength PXDlength
148#define DXDaddress PXDaddress
149#define lengthDXD lengthPXD
150#define addressDXD addressPXD
151#define DXDsize(dxd, size32) ((dxd)->size = cpu_to_le32(size32))
152#define sizeDXD(dxd) le32_to_cpu((dxd)->size)
153
154/*
155 * directory entry argument
156 */
157struct component_name {
158 int namlen;
159 wchar_t *name;
160};
161
162
163/*
164 * DASD limit information - stored in directory inode
165 */
166struct dasd {
167 u8 thresh; /* Alert Threshold (in percent) */
168 u8 delta; /* Alert Threshold delta (in percent) */
169 u8 rsrvd1;
170 u8 limit_hi; /* DASD limit (in logical blocks) */
171 __le32 limit_lo; /* DASD limit (in logical blocks) */
172 u8 rsrvd2[3];
173 u8 used_hi; /* DASD usage (in logical blocks) */
174 __le32 used_lo; /* DASD usage (in logical blocks) */
175};
176
177#define DASDLIMIT(dasdp) \
178 (((u64)((dasdp)->limit_hi) << 32) + __le32_to_cpu((dasdp)->limit_lo))
179#define setDASDLIMIT(dasdp, limit)\
180{\
181 (dasdp)->limit_hi = ((u64)limit) >> 32;\
182 (dasdp)->limit_lo = __cpu_to_le32(limit);\
183}
184#define DASDUSED(dasdp) \
185 (((u64)((dasdp)->used_hi) << 32) + __le32_to_cpu((dasdp)->used_lo))
186#define setDASDUSED(dasdp, used)\
187{\
188 (dasdp)->used_hi = ((u64)used) >> 32;\
189 (dasdp)->used_lo = __cpu_to_le32(used);\
190}
191
192#endif /* !_H_JFS_TYPES */