1/*-
2 * modified for EXT2FS support in Lites 1.1
3 *
4 * Aug 1995, Godmar Back (gback@cs.utah.edu)
5 * University of Utah, Department of Computer Science
6 *
| 1/*-
2 * modified for EXT2FS support in Lites 1.1
3 *
4 * Aug 1995, Godmar Back (gback@cs.utah.edu)
5 * University of Utah, Department of Computer Science
6 *
|
7 * $FreeBSD: head/sys/fs/ext2fs/ext2fs.h 218273 2011-02-04 14:20:27Z jhb $
| 7 * $FreeBSD: head/sys/fs/ext2fs/ext2fs.h 221126 2011-04-27 18:15:34Z jhb $
|
8 */
9/*-
10 * Copyright (c) 2009 Aditya Sarawgi
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *
35 */
36
37#ifndef _FS_EXT2FS_EXT2_FS_H_
38#define _FS_EXT2FS_EXT2_FS_H_
39
40#include <sys/types.h>
41
42/*
43 * Maximal count of links to a file
44 */
45#define EXT2_LINK_MAX 32000
46
47/*
48 * Constants relative to the data blocks
49 */
50#define EXT2_NDIR_BLOCKS 12
51#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
52#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
53#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
54#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
55#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof (uint32_t))
56
57/*
58 * The path name on which the file system is mounted is maintained
59 * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in
60 * the super block for this name.
61 */
62#define MAXMNTLEN 512
63
64/*
65 * Super block for an ext2fs file system.
66 */
67struct ext2fs {
| 8 */
9/*-
10 * Copyright (c) 2009 Aditya Sarawgi
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *
35 */
36
37#ifndef _FS_EXT2FS_EXT2_FS_H_
38#define _FS_EXT2FS_EXT2_FS_H_
39
40#include <sys/types.h>
41
42/*
43 * Maximal count of links to a file
44 */
45#define EXT2_LINK_MAX 32000
46
47/*
48 * Constants relative to the data blocks
49 */
50#define EXT2_NDIR_BLOCKS 12
51#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
52#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
53#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
54#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
55#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof (uint32_t))
56
57/*
58 * The path name on which the file system is mounted is maintained
59 * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in
60 * the super block for this name.
61 */
62#define MAXMNTLEN 512
63
64/*
65 * Super block for an ext2fs file system.
66 */
67struct ext2fs {
|
68 u_int32_t e2fs_icount; /* Inode count */
69 u_int32_t e2fs_bcount; /* blocks count */
70 u_int32_t e2fs_rbcount; /* reserved blocks count */
71 u_int32_t e2fs_fbcount; /* free blocks count */
72 u_int32_t e2fs_ficount; /* free inodes count */
73 u_int32_t e2fs_first_dblock; /* first data block */
74 u_int32_t e2fs_log_bsize; /* block size = 1024*(2^e2fs_log_bsize) */
75 u_int32_t e2fs_log_fsize; /* fragment size */
76 u_int32_t e2fs_bpg; /* blocks per group */
77 u_int32_t e2fs_fpg; /* frags per group */
78 u_int32_t e2fs_ipg; /* inodes per group */
79 u_int32_t e2fs_mtime; /* mount time */
80 u_int32_t e2fs_wtime; /* write time */
81 u_int16_t e2fs_mnt_count; /* mount count */
82 u_int16_t e2fs_max_mnt_count; /* max mount count */
83 u_int16_t e2fs_magic; /* magic number */
84 u_int16_t e2fs_state; /* file system state */
85 u_int16_t e2fs_beh; /* behavior on errors */
86 u_int16_t e2fs_minrev; /* minor revision level */
87 u_int32_t e2fs_lastfsck; /* time of last fsck */
88 u_int32_t e2fs_fsckintv; /* max time between fscks */
89 u_int32_t e2fs_creator; /* creator OS */
90 u_int32_t e2fs_rev; /* revision level */
91 u_int16_t e2fs_ruid; /* default uid for reserved blocks */
92 u_int16_t e2fs_rgid; /* default gid for reserved blocks */
| 68 uint32_t e2fs_icount; /* Inode count */
69 uint32_t e2fs_bcount; /* blocks count */
70 uint32_t e2fs_rbcount; /* reserved blocks count */
71 uint32_t e2fs_fbcount; /* free blocks count */
72 uint32_t e2fs_ficount; /* free inodes count */
73 uint32_t e2fs_first_dblock; /* first data block */
74 uint32_t e2fs_log_bsize; /* block size = 1024*(2^e2fs_log_bsize) */
75 uint32_t e2fs_log_fsize; /* fragment size */
76 uint32_t e2fs_bpg; /* blocks per group */
77 uint32_t e2fs_fpg; /* frags per group */
78 uint32_t e2fs_ipg; /* inodes per group */
79 uint32_t e2fs_mtime; /* mount time */
80 uint32_t e2fs_wtime; /* write time */
81 uint16_t e2fs_mnt_count; /* mount count */
82 uint16_t e2fs_max_mnt_count; /* max mount count */
83 uint16_t e2fs_magic; /* magic number */
84 uint16_t e2fs_state; /* file system state */
85 uint16_t e2fs_beh; /* behavior on errors */
86 uint16_t e2fs_minrev; /* minor revision level */
87 uint32_t e2fs_lastfsck; /* time of last fsck */
88 uint32_t e2fs_fsckintv; /* max time between fscks */
89 uint32_t e2fs_creator; /* creator OS */
90 uint32_t e2fs_rev; /* revision level */
91 uint16_t e2fs_ruid; /* default uid for reserved blocks */
92 uint16_t e2fs_rgid; /* default gid for reserved blocks */
|
93 /* EXT2_DYNAMIC_REV superblocks */
| 93 /* EXT2_DYNAMIC_REV superblocks */
|
94 u_int32_t e2fs_first_ino; /* first non-reserved inode */
95 u_int16_t e2fs_inode_size; /* size of inode structure */
96 u_int16_t e2fs_block_group_nr; /* block grp number of this sblk*/
97 u_int32_t e2fs_features_compat; /* compatible feature set */
98 u_int32_t e2fs_features_incompat; /* incompatible feature set */
99 u_int32_t e2fs_features_rocompat; /* RO-compatible feature set */
100 u_int8_t e2fs_uuid[16]; /* 128-bit uuid for volume */
101 char e2fs_vname[16]; /* volume name */
102 char e2fs_fsmnt[64]; /* name mounted on */
103 u_int32_t e2fs_algo; /* For comcate for dir */
104 u_int16_t e2fs_reserved_ngdb; /* # of reserved gd blocks for resize */
105 u_int32_t reserved2[204];
| 94 uint32_t e2fs_first_ino; /* first non-reserved inode */
95 uint16_t e2fs_inode_size; /* size of inode structure */
96 uint16_t e2fs_block_group_nr; /* block grp number of this sblk*/
97 uint32_t e2fs_features_compat; /* compatible feature set */
98 uint32_t e2fs_features_incompat; /* incompatible feature set */
99 uint32_t e2fs_features_rocompat; /* RO-compatible feature set */
100 uint8_t e2fs_uuid[16]; /* 128-bit uuid for volume */
101 char e2fs_vname[16]; /* volume name */
102 char e2fs_fsmnt[64]; /* name mounted on */
103 uint32_t e2fs_algo; /* For compression */
104 uint8_t e2fs_prealloc; /* # of blocks for old prealloc */
105 uint8_t e2fs_dir_prealloc; /* # of blocks for old prealloc dirs */
106 uint16_t e2fs_reserved_ngdb; /* # of reserved gd blocks for resize */
107 char e3fs_journal_uuid[16]; /* uuid of journal superblock */
108 uint32_t e3fs_journal_inum; /* inode number of journal file */
109 uint32_t e3fs_journal_dev; /* device number of journal file */
110 uint32_t e3fs_last_orphan; /* start of list of inodes to delete */
111 uint32_t e3fs_hash_seed[4]; /* HTREE hash seed */
112 char e3fs_def_hash_version; /* Default hash version to use */
113 char e3fs_reserved_char_pad;
114 uint32_t e3fs_default_mount_opts;
115 uint32_t e3fs_first_meta_bg; /* First metablock block group */
116 uint32_t reserved2[190]; /* Padding to the end of the block */
|
106};
107
108
109/*
110 * In-Memory Superblock
111 */
112
113struct m_ext2fs {
114 struct ext2fs * e2fs;
| 117};
118
119
120/*
121 * In-Memory Superblock
122 */
123
124struct m_ext2fs {
125 struct ext2fs * e2fs;
|
115 char e2fs_fsmnt[MAXMNTLEN];/* name mounted on */
116 char e2fs_ronly; /* mounted read-only flag */
117 char e2fs_fmod; /* super block modified flag */
| 126 char e2fs_fsmnt[MAXMNTLEN];/* name mounted on */
127 char e2fs_ronly; /* mounted read-only flag */
128 char e2fs_fmod; /* super block modified flag */
|
118 uint32_t e2fs_bsize; /* Block size */
119 uint32_t e2fs_bshift; /* calc of logical block no */
| 129 uint32_t e2fs_bsize; /* Block size */
130 uint32_t e2fs_bshift; /* calc of logical block no */
|
120 int32_t e2fs_bmask; /* calc of block offset */
121 int32_t e2fs_bpg; /* Number of blocks per group */
122 int64_t e2fs_qbmask; /* = s_blocksize -1 */
| 131 int32_t e2fs_bmask; /* calc of block offset */
132 int32_t e2fs_bpg; /* Number of blocks per group */
133 int64_t e2fs_qbmask; /* = s_blocksize -1 */
|
123 uint32_t e2fs_fsbtodb; /* Shift to get disk block */
124 uint32_t e2fs_ipg; /* Number of inodes per group */
125 uint32_t e2fs_ipb; /* Number of inodes per block */
126 uint32_t e2fs_itpg; /* Number of inode table per group */
127 uint32_t e2fs_fsize; /* Size of fragments per block */
128 uint32_t e2fs_fpb; /* Number of fragments per block */
129 uint32_t e2fs_fpg; /* Number of fragments per group */
130 uint32_t e2fs_dbpg; /* Number of descriptor blocks per group */
131 uint32_t e2fs_descpb; /* Number of group descriptors per block */
132 uint32_t e2fs_gdbcount; /* Number of group descriptors */
133 uint32_t e2fs_gcount; /* Number of groups */
134 uint32_t e2fs_first_inode;/* First inode on fs */
135 int32_t e2fs_isize; /* Size of inode */
136 uint32_t e2fs_mount_opt;
137 uint32_t e2fs_blocksize_bits;
138 uint32_t e2fs_total_dir; /* Total number of directories */
139 uint8_t *e2fs_contigdirs; /* (u) # of contig. allocated dirs */
| 134 uint32_t e2fs_fsbtodb; /* Shift to get disk block */
135 uint32_t e2fs_ipg; /* Number of inodes per group */
136 uint32_t e2fs_ipb; /* Number of inodes per block */
137 uint32_t e2fs_itpg; /* Number of inode table per group */
138 uint32_t e2fs_fsize; /* Size of fragments per block */
139 uint32_t e2fs_fpb; /* Number of fragments per block */
140 uint32_t e2fs_fpg; /* Number of fragments per group */
141 uint32_t e2fs_dbpg; /* Number of descriptor blocks per group */
142 uint32_t e2fs_descpb; /* Number of group descriptors per block */
143 uint32_t e2fs_gdbcount; /* Number of group descriptors */
144 uint32_t e2fs_gcount; /* Number of groups */
145 uint32_t e2fs_first_inode;/* First inode on fs */
146 int32_t e2fs_isize; /* Size of inode */
147 uint32_t e2fs_mount_opt;
148 uint32_t e2fs_blocksize_bits;
149 uint32_t e2fs_total_dir; /* Total number of directories */
150 uint8_t *e2fs_contigdirs; /* (u) # of contig. allocated dirs */
|
140 char e2fs_wasvalid; /* valid at mount time */
141 off_t e2fs_maxfilesize;
142 struct ext2_gd *e2fs_gd; /* Group Descriptors */
| 151 char e2fs_wasvalid; /* valid at mount time */
152 off_t e2fs_maxfilesize;
153 struct ext2_gd *e2fs_gd; /* Group Descriptors */
|
143};
144
145/*
146 * The second extended file system version
147 */
148#define E2FS_DATE "95/08/09"
149#define E2FS_VERSION "0.5b"
150
151/*
152 * The second extended file system magic number
153 */
154#define E2FS_MAGIC 0xEF53
155
156/*
157 * Revision levels
158 */
159#define E2FS_REV0 0 /* The good old (original) format */
160#define E2FS_REV1 1 /* V2 format w/ dynamic inode sizes */
161
162#define E2FS_CURRENT_REV E2FS_REV0
163#define E2FS_MAX_SUPP_REV E2FS_REV1
164
165#define E2FS_REV0_INODE_SIZE 128
166
167/*
168 * compatible/incompatible features
169 */
170#define EXT2F_COMPAT_PREALLOC 0x0001
171#define EXT2F_COMPAT_HASJOURNAL 0x0004
172#define EXT2F_COMPAT_RESIZE 0x0010
173
174#define EXT2F_ROCOMPAT_SPARSESUPER 0x0001
175#define EXT2F_ROCOMPAT_LARGEFILE 0x0002
176#define EXT2F_ROCOMPAT_BTREE_DIR 0x0004
177
178#define EXT2F_INCOMPAT_COMP 0x0001
179#define EXT2F_INCOMPAT_FTYPE 0x0002
180
181/*
182 * Features supported in this implementation
183 *
184 * We support the following REV1 features:
185 * - EXT2F_ROCOMPAT_SPARSESUPER
186 * - EXT2F_ROCOMPAT_LARGEFILE
187 * - EXT2F_INCOMPAT_FTYPE
188 */
189#define EXT2F_COMPAT_SUPP 0x0000
190#define EXT2F_ROCOMPAT_SUPP (EXT2F_ROCOMPAT_SPARSESUPER \
191 | EXT2F_ROCOMPAT_LARGEFILE)
192#define EXT2F_INCOMPAT_SUPP EXT2F_INCOMPAT_FTYPE
193
194/* Assume that user mode programs are passing in an ext2fs superblock, not
195 * a kernel struct super_block. This will allow us to call the feature-test
196 * macros from user land. */
197#define EXT2_SB(sb) (sb)
198
199/*
200 * Feature set definitions
201 */
202#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
203 ( EXT2_SB(sb)->e2fs->e2fs_features_compat & htole32(mask) )
204#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
205 ( EXT2_SB(sb)->e2fs->e2fs_features_rocompat & htole32(mask) )
206#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
207 ( EXT2_SB(sb)->e2fs->e2fs_features_incompat & htole32(mask) )
208
209/*
210 * Definitions of behavior on errors
211 */
212#define E2FS_BEH_CONTINUE 1 /* continue operation */
213#define E2FS_BEH_READONLY 2 /* remount fs read only */
214#define E2FS_BEH_PANIC 3 /* cause panic */
215#define E2FS_BEH_DEFAULT E2FS_BEH_CONTINUE
216
217/*
218 * OS identification
219 */
220#define E2FS_OS_LINUX 0
221#define E2FS_OS_HURD 1
222#define E2FS_OS_MASIX 2
223#define E2FS_OS_FREEBSD 3
224#define E2FS_OS_LITES 4
225
226/*
227 * File clean flags
228 */
229#define E2FS_ISCLEAN 0x0001 /* Unmounted cleanly */
230#define E2FS_ERRORS 0x0002 /* Errors detected */
231
232/* ext2 file system block group descriptor */
233
234struct ext2_gd {
| 154};
155
156/*
157 * The second extended file system version
158 */
159#define E2FS_DATE "95/08/09"
160#define E2FS_VERSION "0.5b"
161
162/*
163 * The second extended file system magic number
164 */
165#define E2FS_MAGIC 0xEF53
166
167/*
168 * Revision levels
169 */
170#define E2FS_REV0 0 /* The good old (original) format */
171#define E2FS_REV1 1 /* V2 format w/ dynamic inode sizes */
172
173#define E2FS_CURRENT_REV E2FS_REV0
174#define E2FS_MAX_SUPP_REV E2FS_REV1
175
176#define E2FS_REV0_INODE_SIZE 128
177
178/*
179 * compatible/incompatible features
180 */
181#define EXT2F_COMPAT_PREALLOC 0x0001
182#define EXT2F_COMPAT_HASJOURNAL 0x0004
183#define EXT2F_COMPAT_RESIZE 0x0010
184
185#define EXT2F_ROCOMPAT_SPARSESUPER 0x0001
186#define EXT2F_ROCOMPAT_LARGEFILE 0x0002
187#define EXT2F_ROCOMPAT_BTREE_DIR 0x0004
188
189#define EXT2F_INCOMPAT_COMP 0x0001
190#define EXT2F_INCOMPAT_FTYPE 0x0002
191
192/*
193 * Features supported in this implementation
194 *
195 * We support the following REV1 features:
196 * - EXT2F_ROCOMPAT_SPARSESUPER
197 * - EXT2F_ROCOMPAT_LARGEFILE
198 * - EXT2F_INCOMPAT_FTYPE
199 */
200#define EXT2F_COMPAT_SUPP 0x0000
201#define EXT2F_ROCOMPAT_SUPP (EXT2F_ROCOMPAT_SPARSESUPER \
202 | EXT2F_ROCOMPAT_LARGEFILE)
203#define EXT2F_INCOMPAT_SUPP EXT2F_INCOMPAT_FTYPE
204
205/* Assume that user mode programs are passing in an ext2fs superblock, not
206 * a kernel struct super_block. This will allow us to call the feature-test
207 * macros from user land. */
208#define EXT2_SB(sb) (sb)
209
210/*
211 * Feature set definitions
212 */
213#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
214 ( EXT2_SB(sb)->e2fs->e2fs_features_compat & htole32(mask) )
215#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
216 ( EXT2_SB(sb)->e2fs->e2fs_features_rocompat & htole32(mask) )
217#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
218 ( EXT2_SB(sb)->e2fs->e2fs_features_incompat & htole32(mask) )
219
220/*
221 * Definitions of behavior on errors
222 */
223#define E2FS_BEH_CONTINUE 1 /* continue operation */
224#define E2FS_BEH_READONLY 2 /* remount fs read only */
225#define E2FS_BEH_PANIC 3 /* cause panic */
226#define E2FS_BEH_DEFAULT E2FS_BEH_CONTINUE
227
228/*
229 * OS identification
230 */
231#define E2FS_OS_LINUX 0
232#define E2FS_OS_HURD 1
233#define E2FS_OS_MASIX 2
234#define E2FS_OS_FREEBSD 3
235#define E2FS_OS_LITES 4
236
237/*
238 * File clean flags
239 */
240#define E2FS_ISCLEAN 0x0001 /* Unmounted cleanly */
241#define E2FS_ERRORS 0x0002 /* Errors detected */
242
243/* ext2 file system block group descriptor */
244
245struct ext2_gd {
|
235 u_int32_t ext2bgd_b_bitmap; /* blocks bitmap block */
236 u_int32_t ext2bgd_i_bitmap; /* inodes bitmap block */
237 u_int32_t ext2bgd_i_tables; /* inodes table block */
238 u_int16_t ext2bgd_nbfree; /* number of free blocks */
239 u_int16_t ext2bgd_nifree; /* number of free inodes */
240 u_int16_t ext2bgd_ndirs; /* number of directories */
241 u_int16_t reserved;
242 u_int32_t reserved2[3];
| 246 uint32_t ext2bgd_b_bitmap; /* blocks bitmap block */
247 uint32_t ext2bgd_i_bitmap; /* inodes bitmap block */
248 uint32_t ext2bgd_i_tables; /* inodes table block */
249 uint16_t ext2bgd_nbfree; /* number of free blocks */
250 uint16_t ext2bgd_nifree; /* number of free inodes */
251 uint16_t ext2bgd_ndirs; /* number of directories */
252 uint16_t reserved;
253 uint32_t reserved2[3];
|
243};
244
245/* EXT2FS metadatas are stored in little-endian byte order. These macros
246 * helps reading these metadatas
247 */
248
249#define e2fs_cgload(old, new, size) memcpy((new), (old), (size));
250#define e2fs_cgsave(old, new, size) memcpy((new), (old), (size));
251
252/*
253 * Macro-instructions used to manage several block sizes
254 */
255#define EXT2_MIN_BLOCK_SIZE 1024
256#define EXT2_MAX_BLOCK_SIZE 4096
257#define EXT2_MIN_BLOCK_LOG_SIZE 10
258#if defined(_KERNEL)
259# define EXT2_BLOCK_SIZE(s) ((s)->e2fs_bsize)
260#else
261# define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->e2fs_log_bsize)
262#endif
263#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (uint32_t))
264#if defined(_KERNEL)
265# define EXT2_BLOCK_SIZE_BITS(s) ((s)->e2fs_blocksize_bits)
266#else
267# define EXT2_BLOCK_SIZE_BITS(s) ((s)->e2fs_log_bsize + 10)
268#endif
269#if defined(_KERNEL)
270#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
271#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->e2fs_isize)
272#define EXT2_FIRST_INO(s) (EXT2_SB(s)->e2fs_first_inode)
273#else
274#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == E2FS_REV0) ? \
275 E2FS_REV0 : (s)->s_inode_size)
276#define EXT2_FIRST_INO(s) (((s)->s_rev_level == E2FS_REV0) ? \
277 E2FS_REV0 : (s)->e2fs_first_ino)
278#endif
279
280/*
281 * Macro-instructions used to manage fragments
282 */
283#define EXT2_MIN_FRAG_SIZE 1024
284#define EXT2_MAX_FRAG_SIZE 4096
285#define EXT2_MIN_FRAG_LOG_SIZE 10
286#if defined(_KERNEL)
287# define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->e2fs_fsize)
288# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->e2fs_fpb)
289#else
290# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->e2fs_log_fsize)
291# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
292#endif
293
294/*
295 * Macro-instructions used to manage group descriptors
296 */
297#if defined(_KERNEL)
298# define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->e2fs_bpg)
299# define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->e2fs_descpb)
300# define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
301#else
302# define EXT2_BLOCKS_PER_GROUP(s) ((s)->e2fs_bpg)
303# define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_gd))
304
305#endif
306
307#endif /* !_FS_EXT2FS_EXT2FS_H_ */
| 254};
255
256/* EXT2FS metadatas are stored in little-endian byte order. These macros
257 * helps reading these metadatas
258 */
259
260#define e2fs_cgload(old, new, size) memcpy((new), (old), (size));
261#define e2fs_cgsave(old, new, size) memcpy((new), (old), (size));
262
263/*
264 * Macro-instructions used to manage several block sizes
265 */
266#define EXT2_MIN_BLOCK_SIZE 1024
267#define EXT2_MAX_BLOCK_SIZE 4096
268#define EXT2_MIN_BLOCK_LOG_SIZE 10
269#if defined(_KERNEL)
270# define EXT2_BLOCK_SIZE(s) ((s)->e2fs_bsize)
271#else
272# define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->e2fs_log_bsize)
273#endif
274#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (uint32_t))
275#if defined(_KERNEL)
276# define EXT2_BLOCK_SIZE_BITS(s) ((s)->e2fs_blocksize_bits)
277#else
278# define EXT2_BLOCK_SIZE_BITS(s) ((s)->e2fs_log_bsize + 10)
279#endif
280#if defined(_KERNEL)
281#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
282#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->e2fs_isize)
283#define EXT2_FIRST_INO(s) (EXT2_SB(s)->e2fs_first_inode)
284#else
285#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == E2FS_REV0) ? \
286 E2FS_REV0 : (s)->s_inode_size)
287#define EXT2_FIRST_INO(s) (((s)->s_rev_level == E2FS_REV0) ? \
288 E2FS_REV0 : (s)->e2fs_first_ino)
289#endif
290
291/*
292 * Macro-instructions used to manage fragments
293 */
294#define EXT2_MIN_FRAG_SIZE 1024
295#define EXT2_MAX_FRAG_SIZE 4096
296#define EXT2_MIN_FRAG_LOG_SIZE 10
297#if defined(_KERNEL)
298# define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->e2fs_fsize)
299# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->e2fs_fpb)
300#else
301# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->e2fs_log_fsize)
302# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
303#endif
304
305/*
306 * Macro-instructions used to manage group descriptors
307 */
308#if defined(_KERNEL)
309# define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->e2fs_bpg)
310# define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->e2fs_descpb)
311# define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
312#else
313# define EXT2_BLOCKS_PER_GROUP(s) ((s)->e2fs_bpg)
314# define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_gd))
315
316#endif
317
318#endif /* !_FS_EXT2FS_EXT2FS_H_ */
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