ia64/linux-2.6.18-xen.hg

view fs/jfs/jfs_types.h @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
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
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 */
30 #include <linux/types.h>
31 #include <linux/nls.h>
33 #include "endian24.h"
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 */
41 typedef u16 tid_t;
42 typedef u16 lid_t;
44 /*
45 * Almost identical to Linux's timespec, but not quite
46 */
47 struct timestruc_t {
48 __le32 tv_sec;
49 __le32 tv_nsec;
50 };
52 /*
53 * handy
54 */
56 #define LEFTMOSTONE 0x80000000
57 #define HIGHORDER 0x80000000u /* high order bit on */
58 #define ONES 0xffffffffu /* all bit on */
60 typedef int boolean_t;
61 #define TRUE 1
62 #define FALSE 0
64 /*
65 * logical xd (lxd)
66 */
67 typedef struct {
68 unsigned len:24;
69 unsigned off1:8;
70 u32 off2;
71 } lxd_t;
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 }
81 /* lxd_t field extraction */
82 #define lengthLXD(lxd) ( (lxd)->len )
83 #define offsetLXD(lxd)\
84 ( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 )
86 /* lxd list */
87 struct lxdlist {
88 s16 maxnlxd;
89 s16 nlxd;
90 lxd_t *lxd;
91 };
93 /*
94 * physical xd (pxd)
95 */
96 typedef struct {
97 unsigned len:24;
98 unsigned addr1:8;
99 __le32 addr2;
100 } pxd_t;
102 /* xd_t field construction */
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 }
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))
116 #define MAXTREEHEIGHT 8
117 /* pxd list */
118 struct pxdlist {
119 s16 maxnpxd;
120 s16 npxd;
121 pxd_t pxd[MAXTREEHEIGHT];
122 };
125 /*
126 * data extent descriptor (dxd)
127 */
128 typedef 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 - */
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 */
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)
154 /*
155 * directory entry argument
156 */
157 struct component_name {
158 int namlen;
159 wchar_t *name;
160 };
163 /*
164 * DASD limit information - stored in directory inode
165 */
166 struct 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 };
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 }
192 #endif /* !_H_JFS_TYPES */