1 /* SPDX-License-Identifier: GPL-2.0-or-later * <<
2 /* 1 /*
3 * Copyright (C) International Business Mach 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
4 */ 17 */
5 #ifndef _H_JFS_FILSYS 18 #ifndef _H_JFS_FILSYS
6 #define _H_JFS_FILSYS 19 #define _H_JFS_FILSYS
7 20
8 /* 21 /*
9 * jfs_filsys.h 22 * jfs_filsys.h
10 * 23 *
11 * file system (implementation-dependent) cons !! 24 * file system (implementation-dependent) constants
12 * 25 *
13 * refer to <limits.h> for system wide impleme !! 26 * refer to <limits.h> for system wide implementation-dependent constants
14 */ 27 */
15 28
16 /* 29 /*
17 * file system option (superblock flag) 30 * file system option (superblock flag)
18 */ 31 */
19 !! 32 /* mount time flag to disable journaling to disk */
20 /* directory option */ !! 33 #define JFS_NOINTEGRITY 0x00000010
21 #define JFS_UNICODE 0x00000001 /* uni <<
22 34
23 /* mount time flags for error handling */ 35 /* mount time flags for error handling */
24 #define JFS_ERR_REMOUNT_RO 0x00000002 /* rem !! 36 #define JFS_ERR_REMOUNT_RO 0x00000002 /* remount read-only */
25 #define JFS_ERR_CONTINUE 0x00000004 /* con !! 37 #define JFS_ERR_CONTINUE 0x00000004 /* continue */
26 #define JFS_ERR_PANIC 0x00000008 /* pan !! 38 #define JFS_ERR_PANIC 0x00000008 /* panic */
27 <<
28 /* Quota support */ <<
29 #define JFS_USRQUOTA 0x00000010 <<
30 #define JFS_GRPQUOTA 0x00000020 <<
31 39
32 /* mount time flag to disable journaling to di !! 40 /* platform option (conditional compilation) */
33 #define JFS_NOINTEGRITY 0x00000040 !! 41 #define JFS_AIX 0x80000000 /* AIX support */
>> 42 /* POSIX name/directory support */
>> 43
>> 44 #define JFS_OS2 0x40000000 /* OS/2 support */
>> 45 /* case-insensitive name/directory support */
34 46
35 /* mount time flag to enable TRIM to ssd disks !! 47 #define JFS_DFS 0x20000000 /* DCE DFS LFS support */
36 #define JFS_DISCARD 0x00000080 !! 48
>> 49 #define JFS_LINUX 0x10000000 /* Linux support */
>> 50 /* case-sensitive name/directory support */
>> 51
>> 52 /* directory option */
>> 53 #define JFS_UNICODE 0x00000001 /* unicode name */
37 54
38 /* commit option */ 55 /* commit option */
39 #define JFS_COMMIT 0x00000f00 /* com 56 #define JFS_COMMIT 0x00000f00 /* commit option mask */
40 #define JFS_GROUPCOMMIT 0x00000100 /* gro 57 #define JFS_GROUPCOMMIT 0x00000100 /* group (of 1) commit */
41 #define JFS_LAZYCOMMIT 0x00000200 /* laz 58 #define JFS_LAZYCOMMIT 0x00000200 /* lazy commit */
42 #define JFS_TMPFS 0x00000400 /* tem !! 59 #define JFS_TMPFS 0x00000400 /* temporary file system -
43 * do 60 * do not log/commit:
44 * Nev <<
45 */ 61 */
46 62
47 /* log logical volume option */ 63 /* log logical volume option */
48 #define JFS_INLINELOG 0x00000800 /* inl 64 #define JFS_INLINELOG 0x00000800 /* inline log within file system */
49 #define JFS_INLINEMOVE 0x00001000 /* inl 65 #define JFS_INLINEMOVE 0x00001000 /* inline log being moved */
50 66
51 /* Secondary aggregate inode table */ 67 /* Secondary aggregate inode table */
52 #define JFS_BAD_SAIT 0x00010000 /* cur 68 #define JFS_BAD_SAIT 0x00010000 /* current secondary ait is bad */
53 69
54 /* sparse regular file support */ 70 /* sparse regular file support */
55 #define JFS_SPARSE 0x00020000 /* spa 71 #define JFS_SPARSE 0x00020000 /* sparse regular file */
56 72
57 /* DASD Limits F226941 */ 73 /* DASD Limits F226941 */
58 #define JFS_DASD_ENABLED 0x00040000 /* DAS !! 74 #define JFS_DASD_ENABLED 0x00040000 /* DASD limits enabled */
59 #define JFS_DASD_PRIME 0x00080000 /* Pri !! 75 #define JFS_DASD_PRIME 0x00080000 /* Prime DASD usage on boot */
60 76
61 /* big endian flag */ 77 /* big endian flag */
62 #define JFS_SWAP_BYTES 0x00100000 /* run !! 78 #define JFS_SWAP_BYTES 0x00100000 /* running on big endian computer */
63 79
64 /* Directory index */ 80 /* Directory index */
65 #define JFS_DIR_INDEX 0x00200000 /* Per !! 81 #define JFS_DIR_INDEX 0x00200000 /* Persistant index for */
>> 82 /* directory entries */
66 83
67 /* platform options */ <<
68 #define JFS_LINUX 0x10000000 /* Lin <<
69 #define JFS_DFS 0x20000000 /* DCE <<
70 /* Never implemented */ <<
71 <<
72 #define JFS_OS2 0x40000000 /* OS/ <<
73 /* case-insensitive name/directory suppor <<
74 <<
75 #define JFS_AIX 0x80000000 /* AIX <<
76 84
77 /* 85 /*
78 * buffer cache configuration 86 * buffer cache configuration
79 */ 87 */
80 /* page size */ 88 /* page size */
81 #ifdef PSIZE 89 #ifdef PSIZE
82 #undef PSIZE 90 #undef PSIZE
83 #endif 91 #endif
84 #define PSIZE 4096 /* page size ( 92 #define PSIZE 4096 /* page size (in byte) */
85 #define L2PSIZE 12 /* log2(PSIZE) 93 #define L2PSIZE 12 /* log2(PSIZE) */
86 #define POFFSET 4095 /* offset with 94 #define POFFSET 4095 /* offset within page */
87 95
88 /* buffer page size */ 96 /* buffer page size */
89 #define BPSIZE PSIZE 97 #define BPSIZE PSIZE
90 98
91 /* 99 /*
92 * fs fundamental size 100 * fs fundamental size
93 * 101 *
94 * PSIZE >= file system block size >= PBSIZE > 102 * PSIZE >= file system block size >= PBSIZE >= DISIZE
95 */ 103 */
96 #define PBSIZE 512 /* physical bl 104 #define PBSIZE 512 /* physical block size (in byte) */
97 #define L2PBSIZE 9 /* log2(PBSIZE 105 #define L2PBSIZE 9 /* log2(PBSIZE) */
98 106
99 #define DISIZE 512 /* on-disk ino 107 #define DISIZE 512 /* on-disk inode size (in byte) */
100 #define L2DISIZE 9 /* log2(DISIZE 108 #define L2DISIZE 9 /* log2(DISIZE) */
101 109
102 #define IDATASIZE 256 /* inode inlin 110 #define IDATASIZE 256 /* inode inline data size */
103 #define IXATTRSIZE 128 /* inode inlin 111 #define IXATTRSIZE 128 /* inode inline extended attribute size */
104 112
105 #define XTPAGE_SIZE 4096 !! 113 #define XTPAGE_SIZE 4096
106 #define log2_PAGESIZE 12 !! 114 #define log2_PAGESIZE 12
107 115
108 #define IAG_SIZE 4096 !! 116 #define IAG_SIZE 4096
109 #define IAG_EXTENT_SIZE 4096 117 #define IAG_EXTENT_SIZE 4096
110 #define INOSPERIAG 4096 /* number of d 118 #define INOSPERIAG 4096 /* number of disk inodes per iag */
111 #define L2INOSPERIAG 12 /* l2 number o 119 #define L2INOSPERIAG 12 /* l2 number of disk inodes per iag */
112 #define INOSPEREXT 32 /* number of d 120 #define INOSPEREXT 32 /* number of disk inode per extent */
113 #define L2INOSPEREXT 5 /* l2 number o 121 #define L2INOSPEREXT 5 /* l2 number of disk inode per extent */
114 #define IXSIZE (DISIZE * INOSPEREXT) 122 #define IXSIZE (DISIZE * INOSPEREXT) /* inode extent size */
115 #define INOSPERPAGE 8 /* number of d 123 #define INOSPERPAGE 8 /* number of disk inodes per 4K page */
116 #define L2INOSPERPAGE 3 /* log2(INOSPE 124 #define L2INOSPERPAGE 3 /* log2(INOSPERPAGE) */
117 125
118 #define IAGFREELIST_LWM 64 126 #define IAGFREELIST_LWM 64
119 127
120 #define INODE_EXTENT_SIZE IXSIZE /* ino 128 #define INODE_EXTENT_SIZE IXSIZE /* inode extent size */
121 #define NUM_INODE_PER_EXTENT INOSPEREXT 129 #define NUM_INODE_PER_EXTENT INOSPEREXT
122 #define NUM_INODE_PER_IAG INOSPERIAG 130 #define NUM_INODE_PER_IAG INOSPERIAG
123 131
124 #define MINBLOCKSIZE 512 132 #define MINBLOCKSIZE 512
125 #define L2MINBLOCKSIZE 9 <<
126 #define MAXBLOCKSIZE 4096 133 #define MAXBLOCKSIZE 4096
127 #define L2MAXBLOCKSIZE 12 <<
128 #define MAXFILESIZE ((s64)1 << 52) 134 #define MAXFILESIZE ((s64)1 << 52)
129 135
130 #define JFS_LINK_MAX 0xffffffff !! 136 #define JFS_LINK_MAX 65535 /* nlink_t is unsigned short */
131 137
132 /* Minimum number of bytes supported for a JFS 138 /* Minimum number of bytes supported for a JFS partition */
133 #define MINJFS (0x1000000) 139 #define MINJFS (0x1000000)
134 #define MINJFSTEXT "16" 140 #define MINJFSTEXT "16"
135 141
136 /* 142 /*
137 * file system block size -> physical block si 143 * file system block size -> physical block size
138 */ 144 */
139 #define LBOFFSET(x) ((x) & (PBSIZE - 1)) 145 #define LBOFFSET(x) ((x) & (PBSIZE - 1))
140 #define LBNUMBER(x) ((x) >> L2PBSIZE) 146 #define LBNUMBER(x) ((x) >> L2PBSIZE)
141 #define LBLK2PBLK(sb,b) ((b) << (sb->s_blocksi 147 #define LBLK2PBLK(sb,b) ((b) << (sb->s_blocksize_bits - L2PBSIZE))
142 #define PBLK2LBLK(sb,b) ((b) >> (sb->s_blocksi 148 #define PBLK2LBLK(sb,b) ((b) >> (sb->s_blocksize_bits - L2PBSIZE))
143 /* size in byte -> last page number */ 149 /* size in byte -> last page number */
144 #define SIZE2PN(size) ( ((s64)((size) - 1)) 150 #define SIZE2PN(size) ( ((s64)((size) - 1)) >> (L2PSIZE) )
145 /* size in byte -> last file system block numb 151 /* size in byte -> last file system block number */
146 #define SIZE2BN(size, l2bsize) ( ((s64)((size) 152 #define SIZE2BN(size, l2bsize) ( ((s64)((size) - 1)) >> (l2bsize) )
147 153
148 /* 154 /*
149 * fixed physical block address (physical bloc 155 * fixed physical block address (physical block size = 512 byte)
150 * 156 *
151 * NOTE: since we can't guarantee a physical b 157 * NOTE: since we can't guarantee a physical block size of 512 bytes the use of
152 * these macros should be removed and th 158 * these macros should be removed and the byte offset macros used instead.
153 */ 159 */
154 #define SUPER1_B 64 /* primary sup 160 #define SUPER1_B 64 /* primary superblock */
155 #define AIMAP_B (SUPER1_B + 8) /* 1st 161 #define AIMAP_B (SUPER1_B + 8) /* 1st extent of aggregate inode map */
156 #define AITBL_B (AIMAP_B + 16) /* 162 #define AITBL_B (AIMAP_B + 16) /*
157 * 1st 163 * 1st extent of aggregate inode table
158 */ 164 */
159 #define SUPER2_B (AITBL_B + 32) /* 2nd 165 #define SUPER2_B (AITBL_B + 32) /* 2ndary superblock pbn */
160 #define BMAP_B (SUPER2_B + 8) /* blo 166 #define BMAP_B (SUPER2_B + 8) /* block allocation map */
161 167
162 /* 168 /*
163 * SIZE_OF_SUPER defines the total amount of s 169 * SIZE_OF_SUPER defines the total amount of space reserved on disk for the
164 * superblock. This is not the same as the su 170 * superblock. This is not the same as the superblock structure, since all of
165 * this space is not currently being used. 171 * this space is not currently being used.
166 */ 172 */
167 #define SIZE_OF_SUPER PSIZE 173 #define SIZE_OF_SUPER PSIZE
168 174
169 /* 175 /*
170 * SIZE_OF_AG_TABLE defines the amount of spac 176 * SIZE_OF_AG_TABLE defines the amount of space reserved to hold the AG table
171 */ 177 */
172 #define SIZE_OF_AG_TABLE PSIZE 178 #define SIZE_OF_AG_TABLE PSIZE
173 179
174 /* 180 /*
175 * SIZE_OF_MAP_PAGE defines the amount of disk 181 * SIZE_OF_MAP_PAGE defines the amount of disk space reserved for each page of
176 * the inode allocation map (to hold iag) 182 * the inode allocation map (to hold iag)
177 */ 183 */
178 #define SIZE_OF_MAP_PAGE PSIZE 184 #define SIZE_OF_MAP_PAGE PSIZE
179 185
180 /* 186 /*
181 * fixed byte offset address 187 * fixed byte offset address
182 */ 188 */
183 #define SUPER1_OFF 0x8000 /* primary sup 189 #define SUPER1_OFF 0x8000 /* primary superblock */
184 #define AIMAP_OFF (SUPER1_OFF + SIZE_OF_ 190 #define AIMAP_OFF (SUPER1_OFF + SIZE_OF_SUPER)
185 /* 191 /*
186 * Con 192 * Control page of aggregate inode map
187 * fol 193 * followed by 1st extent of map
188 */ 194 */
189 #define AITBL_OFF (AIMAP_OFF + (SIZE_OF_ 195 #define AITBL_OFF (AIMAP_OFF + (SIZE_OF_MAP_PAGE << 1))
190 /* !! 196 /*
191 * 1st 197 * 1st extent of aggregate inode table
192 */ 198 */
193 #define SUPER2_OFF (AITBL_OFF + INODE_EXT 199 #define SUPER2_OFF (AITBL_OFF + INODE_EXTENT_SIZE)
194 /* 200 /*
195 * sec 201 * secondary superblock
196 */ 202 */
197 #define BMAP_OFF (SUPER2_OFF + SIZE_OF_ 203 #define BMAP_OFF (SUPER2_OFF + SIZE_OF_SUPER)
198 /* 204 /*
199 * blo 205 * block allocation map
200 */ 206 */
201 207
202 /* 208 /*
203 * The following macro is used to indicate the 209 * The following macro is used to indicate the number of reserved disk blocks at
204 * the front of an aggregate, in terms of phys 210 * the front of an aggregate, in terms of physical blocks. This value is
205 * currently defined to be 32K. This turns ou 211 * currently defined to be 32K. This turns out to be the same as the primary
206 * superblock's address, since it directly fol 212 * superblock's address, since it directly follows the reserved blocks.
207 */ 213 */
208 #define AGGR_RSVD_BLOCKS SUPER1_B 214 #define AGGR_RSVD_BLOCKS SUPER1_B
209 215
210 /* 216 /*
211 * The following macro is used to indicate the 217 * The following macro is used to indicate the number of reserved bytes at the
212 * front of an aggregate. This value is curre 218 * front of an aggregate. This value is currently defined to be 32K. This
213 * turns out to be the same as the primary sup 219 * turns out to be the same as the primary superblock's byte offset, since it
214 * directly follows the reserved blocks. 220 * directly follows the reserved blocks.
215 */ 221 */
216 #define AGGR_RSVD_BYTES SUPER1_OFF 222 #define AGGR_RSVD_BYTES SUPER1_OFF
217 223
218 /* 224 /*
219 * The following macro defines the byte offset 225 * The following macro defines the byte offset for the first inode extent in
220 * the aggregate inode table. This allows us 226 * the aggregate inode table. This allows us to find the self inode to find the
221 * rest of the table. Currently this value is 227 * rest of the table. Currently this value is 44K.
222 */ 228 */
223 #define AGGR_INODE_TABLE_START AITBL_OFF 229 #define AGGR_INODE_TABLE_START AITBL_OFF
224 230
225 /* 231 /*
226 * fixed reserved inode number 232 * fixed reserved inode number
227 */ 233 */
228 /* aggregate inode */ 234 /* aggregate inode */
229 #define AGGR_RESERVED_I 0 /* aggregate i 235 #define AGGR_RESERVED_I 0 /* aggregate inode (reserved) */
230 #define AGGREGATE_I 1 /* aggregate i 236 #define AGGREGATE_I 1 /* aggregate inode map inode */
231 #define BMAP_I 2 /* aggregate b 237 #define BMAP_I 2 /* aggregate block allocation map inode */
232 #define LOG_I 3 /* aggregate i 238 #define LOG_I 3 /* aggregate inline log inode */
233 #define BADBLOCK_I 4 /* aggregate b 239 #define BADBLOCK_I 4 /* aggregate bad block inode */
234 #define FILESYSTEM_I 16 /* 1st/only fi 240 #define FILESYSTEM_I 16 /* 1st/only fileset inode in ait:
235 * fileset ino 241 * fileset inode map inode
236 */ 242 */
237 243
238 /* per fileset inode */ 244 /* per fileset inode */
239 #define FILESET_RSVD_I 0 /* fileset ino 245 #define FILESET_RSVD_I 0 /* fileset inode (reserved) */
240 #define FILESET_EXT_I 1 /* fileset ino 246 #define FILESET_EXT_I 1 /* fileset inode extension */
241 #define ROOT_I 2 /* fileset roo 247 #define ROOT_I 2 /* fileset root inode */
242 #define ACL_I 3 /* fileset ACL 248 #define ACL_I 3 /* fileset ACL inode */
243 249
244 #define FILESET_OBJECT_I 4 /* the first f 250 #define FILESET_OBJECT_I 4 /* the first fileset inode available for a file
245 * or director 251 * or directory or link...
246 */ 252 */
247 #define FIRST_FILESET_INO 16 /* the first a 253 #define FIRST_FILESET_INO 16 /* the first aggregate inode which describes
248 * an inode. 254 * an inode. (To fsck this is also the first
249 * inode in pa 255 * inode in part 2 of the agg inode table.)
250 */ 256 */
251 257
252 /* 258 /*
253 * directory configuration 259 * directory configuration
254 */ 260 */
255 #define JFS_NAME_MAX 255 261 #define JFS_NAME_MAX 255
256 #define JFS_PATH_MAX BPSIZE 262 #define JFS_PATH_MAX BPSIZE
257 263
258 264
259 /* 265 /*
260 * file system state (superblock state) 266 * file system state (superblock state)
261 */ 267 */
262 #define FM_CLEAN 0x00000000 /* file system 268 #define FM_CLEAN 0x00000000 /* file system is unmounted and clean */
263 #define FM_MOUNT 0x00000001 /* file system 269 #define FM_MOUNT 0x00000001 /* file system is mounted cleanly */
264 #define FM_DIRTY 0x00000002 /* file system !! 270 #define FM_DIRTY 0x00000002 /* file system was not unmounted and clean
265 * when mounte !! 271 * when mounted or
266 * commit fail 272 * commit failure occurred while being mounted:
267 * fsck() must !! 273 * fsck() must be run to repair
268 */ 274 */
269 #define FM_LOGREDO 0x00000004 /* log based r 275 #define FM_LOGREDO 0x00000004 /* log based recovery (logredo()) failed:
270 * fsck() must !! 276 * fsck() must be run to repair
271 */ 277 */
272 #define FM_EXTENDFS 0x00000008 /* file system 278 #define FM_EXTENDFS 0x00000008 /* file system extendfs() in progress */
273 #define FM_STATE_MAX 0x0000000f /* max value o <<
274 279
275 #endif /* _H_JFS_FILS 280 #endif /* _H_JFS_FILSYS */
276 281
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