ia64/linux-2.6.18-xen.hg

view fs/jfs/jfs_filsys.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., 2000-2003
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_FILSYS
19 #define _H_JFS_FILSYS
21 /*
22 * jfs_filsys.h
23 *
24 * file system (implementation-dependent) constants
25 *
26 * refer to <limits.h> for system wide implementation-dependent constants
27 */
29 /*
30 * file system option (superblock flag)
31 */
32 /* mount time flag to disable journaling to disk */
33 #define JFS_NOINTEGRITY 0x00000010
35 /* mount time flags for error handling */
36 #define JFS_ERR_REMOUNT_RO 0x00000002 /* remount read-only */
37 #define JFS_ERR_CONTINUE 0x00000004 /* continue */
38 #define JFS_ERR_PANIC 0x00000008 /* panic */
40 #define JFS_USRQUOTA 0x00000010
41 #define JFS_GRPQUOTA 0x00000020
43 /* platform option (conditional compilation) */
44 #define JFS_AIX 0x80000000 /* AIX support */
45 /* POSIX name/directory support */
47 #define JFS_OS2 0x40000000 /* OS/2 support */
48 /* case-insensitive name/directory support */
50 #define JFS_DFS 0x20000000 /* DCE DFS LFS support */
52 #define JFS_LINUX 0x10000000 /* Linux support */
53 /* case-sensitive name/directory support */
55 /* directory option */
56 #define JFS_UNICODE 0x00000001 /* unicode name */
58 /* commit option */
59 #define JFS_COMMIT 0x00000f00 /* commit option mask */
60 #define JFS_GROUPCOMMIT 0x00000100 /* group (of 1) commit */
61 #define JFS_LAZYCOMMIT 0x00000200 /* lazy commit */
62 #define JFS_TMPFS 0x00000400 /* temporary file system -
63 * do not log/commit:
64 */
66 /* log logical volume option */
67 #define JFS_INLINELOG 0x00000800 /* inline log within file system */
68 #define JFS_INLINEMOVE 0x00001000 /* inline log being moved */
70 /* Secondary aggregate inode table */
71 #define JFS_BAD_SAIT 0x00010000 /* current secondary ait is bad */
73 /* sparse regular file support */
74 #define JFS_SPARSE 0x00020000 /* sparse regular file */
76 /* DASD Limits F226941 */
77 #define JFS_DASD_ENABLED 0x00040000 /* DASD limits enabled */
78 #define JFS_DASD_PRIME 0x00080000 /* Prime DASD usage on boot */
80 /* big endian flag */
81 #define JFS_SWAP_BYTES 0x00100000 /* running on big endian computer */
83 /* Directory index */
84 #define JFS_DIR_INDEX 0x00200000 /* Persistant index for */
85 /* directory entries */
88 /*
89 * buffer cache configuration
90 */
91 /* page size */
92 #ifdef PSIZE
93 #undef PSIZE
94 #endif
95 #define PSIZE 4096 /* page size (in byte) */
96 #define L2PSIZE 12 /* log2(PSIZE) */
97 #define POFFSET 4095 /* offset within page */
99 /* buffer page size */
100 #define BPSIZE PSIZE
102 /*
103 * fs fundamental size
104 *
105 * PSIZE >= file system block size >= PBSIZE >= DISIZE
106 */
107 #define PBSIZE 512 /* physical block size (in byte) */
108 #define L2PBSIZE 9 /* log2(PBSIZE) */
110 #define DISIZE 512 /* on-disk inode size (in byte) */
111 #define L2DISIZE 9 /* log2(DISIZE) */
113 #define IDATASIZE 256 /* inode inline data size */
114 #define IXATTRSIZE 128 /* inode inline extended attribute size */
116 #define XTPAGE_SIZE 4096
117 #define log2_PAGESIZE 12
119 #define IAG_SIZE 4096
120 #define IAG_EXTENT_SIZE 4096
121 #define INOSPERIAG 4096 /* number of disk inodes per iag */
122 #define L2INOSPERIAG 12 /* l2 number of disk inodes per iag */
123 #define INOSPEREXT 32 /* number of disk inode per extent */
124 #define L2INOSPEREXT 5 /* l2 number of disk inode per extent */
125 #define IXSIZE (DISIZE * INOSPEREXT) /* inode extent size */
126 #define INOSPERPAGE 8 /* number of disk inodes per 4K page */
127 #define L2INOSPERPAGE 3 /* log2(INOSPERPAGE) */
129 #define IAGFREELIST_LWM 64
131 #define INODE_EXTENT_SIZE IXSIZE /* inode extent size */
132 #define NUM_INODE_PER_EXTENT INOSPEREXT
133 #define NUM_INODE_PER_IAG INOSPERIAG
135 #define MINBLOCKSIZE 512
136 #define MAXBLOCKSIZE 4096
137 #define MAXFILESIZE ((s64)1 << 52)
139 #define JFS_LINK_MAX 0xffffffff
141 /* Minimum number of bytes supported for a JFS partition */
142 #define MINJFS (0x1000000)
143 #define MINJFSTEXT "16"
145 /*
146 * file system block size -> physical block size
147 */
148 #define LBOFFSET(x) ((x) & (PBSIZE - 1))
149 #define LBNUMBER(x) ((x) >> L2PBSIZE)
150 #define LBLK2PBLK(sb,b) ((b) << (sb->s_blocksize_bits - L2PBSIZE))
151 #define PBLK2LBLK(sb,b) ((b) >> (sb->s_blocksize_bits - L2PBSIZE))
152 /* size in byte -> last page number */
153 #define SIZE2PN(size) ( ((s64)((size) - 1)) >> (L2PSIZE) )
154 /* size in byte -> last file system block number */
155 #define SIZE2BN(size, l2bsize) ( ((s64)((size) - 1)) >> (l2bsize) )
157 /*
158 * fixed physical block address (physical block size = 512 byte)
159 *
160 * NOTE: since we can't guarantee a physical block size of 512 bytes the use of
161 * these macros should be removed and the byte offset macros used instead.
162 */
163 #define SUPER1_B 64 /* primary superblock */
164 #define AIMAP_B (SUPER1_B + 8) /* 1st extent of aggregate inode map */
165 #define AITBL_B (AIMAP_B + 16) /*
166 * 1st extent of aggregate inode table
167 */
168 #define SUPER2_B (AITBL_B + 32) /* 2ndary superblock pbn */
169 #define BMAP_B (SUPER2_B + 8) /* block allocation map */
171 /*
172 * SIZE_OF_SUPER defines the total amount of space reserved on disk for the
173 * superblock. This is not the same as the superblock structure, since all of
174 * this space is not currently being used.
175 */
176 #define SIZE_OF_SUPER PSIZE
178 /*
179 * SIZE_OF_AG_TABLE defines the amount of space reserved to hold the AG table
180 */
181 #define SIZE_OF_AG_TABLE PSIZE
183 /*
184 * SIZE_OF_MAP_PAGE defines the amount of disk space reserved for each page of
185 * the inode allocation map (to hold iag)
186 */
187 #define SIZE_OF_MAP_PAGE PSIZE
189 /*
190 * fixed byte offset address
191 */
192 #define SUPER1_OFF 0x8000 /* primary superblock */
193 #define AIMAP_OFF (SUPER1_OFF + SIZE_OF_SUPER)
194 /*
195 * Control page of aggregate inode map
196 * followed by 1st extent of map
197 */
198 #define AITBL_OFF (AIMAP_OFF + (SIZE_OF_MAP_PAGE << 1))
199 /*
200 * 1st extent of aggregate inode table
201 */
202 #define SUPER2_OFF (AITBL_OFF + INODE_EXTENT_SIZE)
203 /*
204 * secondary superblock
205 */
206 #define BMAP_OFF (SUPER2_OFF + SIZE_OF_SUPER)
207 /*
208 * block allocation map
209 */
211 /*
212 * The following macro is used to indicate the number of reserved disk blocks at
213 * the front of an aggregate, in terms of physical blocks. This value is
214 * currently defined to be 32K. This turns out to be the same as the primary
215 * superblock's address, since it directly follows the reserved blocks.
216 */
217 #define AGGR_RSVD_BLOCKS SUPER1_B
219 /*
220 * The following macro is used to indicate the number of reserved bytes at the
221 * front of an aggregate. This value is currently defined to be 32K. This
222 * turns out to be the same as the primary superblock's byte offset, since it
223 * directly follows the reserved blocks.
224 */
225 #define AGGR_RSVD_BYTES SUPER1_OFF
227 /*
228 * The following macro defines the byte offset for the first inode extent in
229 * the aggregate inode table. This allows us to find the self inode to find the
230 * rest of the table. Currently this value is 44K.
231 */
232 #define AGGR_INODE_TABLE_START AITBL_OFF
234 /*
235 * fixed reserved inode number
236 */
237 /* aggregate inode */
238 #define AGGR_RESERVED_I 0 /* aggregate inode (reserved) */
239 #define AGGREGATE_I 1 /* aggregate inode map inode */
240 #define BMAP_I 2 /* aggregate block allocation map inode */
241 #define LOG_I 3 /* aggregate inline log inode */
242 #define BADBLOCK_I 4 /* aggregate bad block inode */
243 #define FILESYSTEM_I 16 /* 1st/only fileset inode in ait:
244 * fileset inode map inode
245 */
247 /* per fileset inode */
248 #define FILESET_RSVD_I 0 /* fileset inode (reserved) */
249 #define FILESET_EXT_I 1 /* fileset inode extension */
250 #define ROOT_I 2 /* fileset root inode */
251 #define ACL_I 3 /* fileset ACL inode */
253 #define FILESET_OBJECT_I 4 /* the first fileset inode available for a file
254 * or directory or link...
255 */
256 #define FIRST_FILESET_INO 16 /* the first aggregate inode which describes
257 * an inode. (To fsck this is also the first
258 * inode in part 2 of the agg inode table.)
259 */
261 /*
262 * directory configuration
263 */
264 #define JFS_NAME_MAX 255
265 #define JFS_PATH_MAX BPSIZE
268 /*
269 * file system state (superblock state)
270 */
271 #define FM_CLEAN 0x00000000 /* file system is unmounted and clean */
272 #define FM_MOUNT 0x00000001 /* file system is mounted cleanly */
273 #define FM_DIRTY 0x00000002 /* file system was not unmounted and clean
274 * when mounted or
275 * commit failure occurred while being mounted:
276 * fsck() must be run to repair
277 */
278 #define FM_LOGREDO 0x00000004 /* log based recovery (logredo()) failed:
279 * fsck() must be run to repair
280 */
281 #define FM_EXTENDFS 0x00000008 /* file system extendfs() in progress */
283 #endif /* _H_JFS_FILSYS */