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 251562 2013-06-09 01:38:51Z pfg $
| 7 * $FreeBSD: head/sys/fs/ext2fs/ext2fs.h 251809 2013-06-16 16:10:45Z pfg $
|
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_EXT2FS_H_
38#define _FS_EXT2FS_EXT2FS_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/*
| 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_EXT2FS_H_
38#define _FS_EXT2FS_EXT2FS_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 * A summary of contiguous blocks of various sizes is maintained
49 * in each cylinder group. Normally this is set by the initial
50 * value of fs_maxcontig.
51 *
52 * XXX:FS_MAXCONTIG is set to 16 to conserve space. Here we set
53 * EXT2_MAXCONTIG to 32 for better performance.
54 */
55#define EXT2_MAXCONTIG 32
56
57/*
58 * Constants relative to the data blocks
59 */
60#define EXT2_NDIR_BLOCKS 12
61#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
62#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
63#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
64#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
65#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof(uint32_t))
66
67/*
| |
68 * The path name on which the file system is mounted is maintained
69 * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in
70 * the super block for this name.
71 */
72#define MAXMNTLEN 512
73
74/*
75 * Super block for an ext2fs file system.
76 */
77struct ext2fs {
78 uint32_t e2fs_icount; /* Inode count */
79 uint32_t e2fs_bcount; /* blocks count */
80 uint32_t e2fs_rbcount; /* reserved blocks count */
81 uint32_t e2fs_fbcount; /* free blocks count */
82 uint32_t e2fs_ficount; /* free inodes count */
83 uint32_t e2fs_first_dblock; /* first data block */
84 uint32_t e2fs_log_bsize; /* block size = 1024*(2^e2fs_log_bsize) */
85 uint32_t e2fs_log_fsize; /* fragment size */
86 uint32_t e2fs_bpg; /* blocks per group */
87 uint32_t e2fs_fpg; /* frags per group */
88 uint32_t e2fs_ipg; /* inodes per group */
89 uint32_t e2fs_mtime; /* mount time */
90 uint32_t e2fs_wtime; /* write time */
91 uint16_t e2fs_mnt_count; /* mount count */
92 uint16_t e2fs_max_mnt_count; /* max mount count */
93 uint16_t e2fs_magic; /* magic number */
94 uint16_t e2fs_state; /* file system state */
95 uint16_t e2fs_beh; /* behavior on errors */
96 uint16_t e2fs_minrev; /* minor revision level */
97 uint32_t e2fs_lastfsck; /* time of last fsck */
98 uint32_t e2fs_fsckintv; /* max time between fscks */
99 uint32_t e2fs_creator; /* creator OS */
100 uint32_t e2fs_rev; /* revision level */
101 uint16_t e2fs_ruid; /* default uid for reserved blocks */
102 uint16_t e2fs_rgid; /* default gid for reserved blocks */
103 /* EXT2_DYNAMIC_REV superblocks */
104 uint32_t e2fs_first_ino; /* first non-reserved inode */
105 uint16_t e2fs_inode_size; /* size of inode structure */
106 uint16_t e2fs_block_group_nr; /* block grp number of this sblk*/
107 uint32_t e2fs_features_compat; /* compatible feature set */
108 uint32_t e2fs_features_incompat; /* incompatible feature set */
109 uint32_t e2fs_features_rocompat; /* RO-compatible feature set */
110 uint8_t e2fs_uuid[16]; /* 128-bit uuid for volume */
111 char e2fs_vname[16]; /* volume name */
112 char e2fs_fsmnt[64]; /* name mounted on */
113 uint32_t e2fs_algo; /* For compression */
114 uint8_t e2fs_prealloc; /* # of blocks for old prealloc */
115 uint8_t e2fs_dir_prealloc; /* # of blocks for old prealloc dirs */
116 uint16_t e2fs_reserved_ngdb; /* # of reserved gd blocks for resize */
117 char e3fs_journal_uuid[16]; /* uuid of journal superblock */
118 uint32_t e3fs_journal_inum; /* inode number of journal file */
119 uint32_t e3fs_journal_dev; /* device number of journal file */
120 uint32_t e3fs_last_orphan; /* start of list of inodes to delete */
121 uint32_t e3fs_hash_seed[4]; /* HTREE hash seed */
122 char e3fs_def_hash_version; /* Default hash version to use */
123 char e3fs_reserved_char_pad;
124 uint32_t e3fs_default_mount_opts;
125 uint32_t e3fs_first_meta_bg; /* First metablock block group */
126 uint32_t e3fs_mkfs_time; /* when the fs was created */
127 uint32_t e3fs_jnl_blks[17]; /* backup of the journal inode */
128 uint32_t e4fs_bcount_hi; /* block count */
129 uint32_t e4fs_rbcount_hi; /* reserved blocks count */
130 uint32_t e4fs_fbcount_hi; /* free blocks count */
131 uint16_t e4fs_min_extra_isize;/* all inodes have at least some bytes */
132 uint16_t e4fs_want_extra_isize; /* inodes must reserve some bytes */
133 uint32_t e4fs_flags; /* miscellaneous flags */
134 uint16_t e4fs_raid_stride; /* RAID stride */
135 uint16_t e4fs_mmpintv; /* number of seconds to wait in MMP checking */
136 uint64_t e4fs_mmpblk; /* block for multi-mount protection */
137 uint32_t e4fs_raid_stripe_wid;/* blocks on all data disks (N * stride) */
138 uint8_t e4fs_log_gpf; /* FLEX_BG group size */
139 uint8_t e4fs_char_pad2;
140 uint16_t e4fs_pad;
141 uint32_t reserved2[162]; /* Padding to the end of the block */
142};
143
144
145/*
146 * In-Memory Superblock
147 */
148
149struct m_ext2fs {
150 struct ext2fs * e2fs;
151 char e2fs_fsmnt[MAXMNTLEN];/* name mounted on */
152 char e2fs_ronly; /* mounted read-only flag */
153 char e2fs_fmod; /* super block modified flag */
154 uint32_t e2fs_bsize; /* Block size */
155 uint32_t e2fs_bshift; /* calc of logical block no */
156 uint32_t e2fs_bpg; /* Number of blocks per group */
157 int64_t e2fs_qbmask; /* = s_blocksize -1 */
158 uint32_t e2fs_fsbtodb; /* Shift to get disk block */
159 uint32_t e2fs_ipg; /* Number of inodes per group */
160 uint32_t e2fs_ipb; /* Number of inodes per block */
161 uint32_t e2fs_itpg; /* Number of inode table per group */
162 uint32_t e2fs_fsize; /* Size of fragments per block */
163 uint32_t e2fs_fpb; /* Number of fragments per block */
164 uint32_t e2fs_fpg; /* Number of fragments per group */
165 uint32_t e2fs_gdbcount; /* Number of group descriptors */
166 uint32_t e2fs_gcount; /* Number of groups */
167 uint32_t e2fs_isize; /* Size of inode */
168 uint32_t e2fs_total_dir; /* Total number of directories */
169 uint8_t *e2fs_contigdirs; /* (u) # of contig. allocated dirs */
170 char e2fs_wasvalid; /* valid at mount time */
171 off_t e2fs_maxfilesize;
172 struct ext2_gd *e2fs_gd; /* Group Descriptors */
173 int32_t e2fs_contigsumsize; /* size of cluster summary array */
174 int32_t *e2fs_maxcluster; /* max cluster in each cyl group */
175 struct csum *e2fs_clustersum; /* cluster summary in each cyl group */
176};
177
| 48 * The path name on which the file system is mounted is maintained
49 * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in
50 * the super block for this name.
51 */
52#define MAXMNTLEN 512
53
54/*
55 * Super block for an ext2fs file system.
56 */
57struct ext2fs {
58 uint32_t e2fs_icount; /* Inode count */
59 uint32_t e2fs_bcount; /* blocks count */
60 uint32_t e2fs_rbcount; /* reserved blocks count */
61 uint32_t e2fs_fbcount; /* free blocks count */
62 uint32_t e2fs_ficount; /* free inodes count */
63 uint32_t e2fs_first_dblock; /* first data block */
64 uint32_t e2fs_log_bsize; /* block size = 1024*(2^e2fs_log_bsize) */
65 uint32_t e2fs_log_fsize; /* fragment size */
66 uint32_t e2fs_bpg; /* blocks per group */
67 uint32_t e2fs_fpg; /* frags per group */
68 uint32_t e2fs_ipg; /* inodes per group */
69 uint32_t e2fs_mtime; /* mount time */
70 uint32_t e2fs_wtime; /* write time */
71 uint16_t e2fs_mnt_count; /* mount count */
72 uint16_t e2fs_max_mnt_count; /* max mount count */
73 uint16_t e2fs_magic; /* magic number */
74 uint16_t e2fs_state; /* file system state */
75 uint16_t e2fs_beh; /* behavior on errors */
76 uint16_t e2fs_minrev; /* minor revision level */
77 uint32_t e2fs_lastfsck; /* time of last fsck */
78 uint32_t e2fs_fsckintv; /* max time between fscks */
79 uint32_t e2fs_creator; /* creator OS */
80 uint32_t e2fs_rev; /* revision level */
81 uint16_t e2fs_ruid; /* default uid for reserved blocks */
82 uint16_t e2fs_rgid; /* default gid for reserved blocks */
83 /* EXT2_DYNAMIC_REV superblocks */
84 uint32_t e2fs_first_ino; /* first non-reserved inode */
85 uint16_t e2fs_inode_size; /* size of inode structure */
86 uint16_t e2fs_block_group_nr; /* block grp number of this sblk*/
87 uint32_t e2fs_features_compat; /* compatible feature set */
88 uint32_t e2fs_features_incompat; /* incompatible feature set */
89 uint32_t e2fs_features_rocompat; /* RO-compatible feature set */
90 uint8_t e2fs_uuid[16]; /* 128-bit uuid for volume */
91 char e2fs_vname[16]; /* volume name */
92 char e2fs_fsmnt[64]; /* name mounted on */
93 uint32_t e2fs_algo; /* For compression */
94 uint8_t e2fs_prealloc; /* # of blocks for old prealloc */
95 uint8_t e2fs_dir_prealloc; /* # of blocks for old prealloc dirs */
96 uint16_t e2fs_reserved_ngdb; /* # of reserved gd blocks for resize */
97 char e3fs_journal_uuid[16]; /* uuid of journal superblock */
98 uint32_t e3fs_journal_inum; /* inode number of journal file */
99 uint32_t e3fs_journal_dev; /* device number of journal file */
100 uint32_t e3fs_last_orphan; /* start of list of inodes to delete */
101 uint32_t e3fs_hash_seed[4]; /* HTREE hash seed */
102 char e3fs_def_hash_version; /* Default hash version to use */
103 char e3fs_reserved_char_pad;
104 uint32_t e3fs_default_mount_opts;
105 uint32_t e3fs_first_meta_bg; /* First metablock block group */
106 uint32_t e3fs_mkfs_time; /* when the fs was created */
107 uint32_t e3fs_jnl_blks[17]; /* backup of the journal inode */
108 uint32_t e4fs_bcount_hi; /* block count */
109 uint32_t e4fs_rbcount_hi; /* reserved blocks count */
110 uint32_t e4fs_fbcount_hi; /* free blocks count */
111 uint16_t e4fs_min_extra_isize;/* all inodes have at least some bytes */
112 uint16_t e4fs_want_extra_isize; /* inodes must reserve some bytes */
113 uint32_t e4fs_flags; /* miscellaneous flags */
114 uint16_t e4fs_raid_stride; /* RAID stride */
115 uint16_t e4fs_mmpintv; /* number of seconds to wait in MMP checking */
116 uint64_t e4fs_mmpblk; /* block for multi-mount protection */
117 uint32_t e4fs_raid_stripe_wid;/* blocks on all data disks (N * stride) */
118 uint8_t e4fs_log_gpf; /* FLEX_BG group size */
119 uint8_t e4fs_char_pad2;
120 uint16_t e4fs_pad;
121 uint32_t reserved2[162]; /* Padding to the end of the block */
122};
123
124
125/*
126 * In-Memory Superblock
127 */
128
129struct m_ext2fs {
130 struct ext2fs * e2fs;
131 char e2fs_fsmnt[MAXMNTLEN];/* name mounted on */
132 char e2fs_ronly; /* mounted read-only flag */
133 char e2fs_fmod; /* super block modified flag */
134 uint32_t e2fs_bsize; /* Block size */
135 uint32_t e2fs_bshift; /* calc of logical block no */
136 uint32_t e2fs_bpg; /* Number of blocks per group */
137 int64_t e2fs_qbmask; /* = s_blocksize -1 */
138 uint32_t e2fs_fsbtodb; /* Shift to get disk block */
139 uint32_t e2fs_ipg; /* Number of inodes per group */
140 uint32_t e2fs_ipb; /* Number of inodes per block */
141 uint32_t e2fs_itpg; /* Number of inode table per group */
142 uint32_t e2fs_fsize; /* Size of fragments per block */
143 uint32_t e2fs_fpb; /* Number of fragments per block */
144 uint32_t e2fs_fpg; /* Number of fragments per group */
145 uint32_t e2fs_gdbcount; /* Number of group descriptors */
146 uint32_t e2fs_gcount; /* Number of groups */
147 uint32_t e2fs_isize; /* Size of inode */
148 uint32_t e2fs_total_dir; /* Total number of directories */
149 uint8_t *e2fs_contigdirs; /* (u) # of contig. allocated dirs */
150 char e2fs_wasvalid; /* valid at mount time */
151 off_t e2fs_maxfilesize;
152 struct ext2_gd *e2fs_gd; /* Group Descriptors */
153 int32_t e2fs_contigsumsize; /* size of cluster summary array */
154 int32_t *e2fs_maxcluster; /* max cluster in each cyl group */
155 struct csum *e2fs_clustersum; /* cluster summary in each cyl group */
156};
157
|
178/*
179 * The second extended file system version
180 */
181#define E2FS_DATE "95/08/09"
182#define E2FS_VERSION "0.5b"
| 158/* cluster summary information */
|
183
| 159
|
| 160struct csum {
161 int8_t cs_init; /* cluster summary has been initialized */
162 int32_t *cs_sum; /* cluster summary array */
163};
164
|
184/*
185 * The second extended file system magic number
186 */
187#define E2FS_MAGIC 0xEF53
188
189/*
190 * Revision levels
191 */
192#define E2FS_REV0 0 /* The good old (original) format */
193#define E2FS_REV1 1 /* V2 format w/ dynamic inode sizes */
194
| 165/*
166 * The second extended file system magic number
167 */
168#define E2FS_MAGIC 0xEF53
169
170/*
171 * Revision levels
172 */
173#define E2FS_REV0 0 /* The good old (original) format */
174#define E2FS_REV1 1 /* V2 format w/ dynamic inode sizes */
175
|
195#define E2FS_CURRENT_REV E2FS_REV0
196#define E2FS_MAX_SUPP_REV E2FS_REV1
197
| |
198#define E2FS_REV0_INODE_SIZE 128
199
200/*
201 * compatible/incompatible features
202 */
203#define EXT2F_COMPAT_PREALLOC 0x0001
204#define EXT2F_COMPAT_HASJOURNAL 0x0004
205#define EXT2F_COMPAT_RESIZE 0x0010
206#define EXT2F_COMPAT_DIRHASHINDEX 0x0020
207
208#define EXT2F_ROCOMPAT_SPARSESUPER 0x0001
209#define EXT2F_ROCOMPAT_LARGEFILE 0x0002
210#define EXT2F_ROCOMPAT_BTREE_DIR 0x0004
211#define EXT2F_ROCOMPAT_HUGE_FILE 0x0008
212#define EXT2F_ROCOMPAT_GDT_CSUM 0x0010
213#define EXT2F_ROCOMPAT_DIR_NLINK 0x0020
214#define EXT2F_ROCOMPAT_EXTRA_ISIZE 0x0040
215
216#define EXT2F_INCOMPAT_COMP 0x0001
217#define EXT2F_INCOMPAT_FTYPE 0x0002
218#define EXT2F_INCOMPAT_META_BG 0x0010
219#define EXT2F_INCOMPAT_EXTENTS 0x0040
220#define EXT2F_INCOMPAT_64BIT 0x0080
221#define EXT2F_INCOMPAT_MMP 0x0100
222#define EXT2F_INCOMPAT_FLEX_BG 0x0200
223
224/*
225 * Features supported in this implementation
226 *
227 * We support the following REV1 features:
228 * - EXT2F_ROCOMPAT_SPARSESUPER
229 * - EXT2F_ROCOMPAT_LARGEFILE
230 * - EXT2F_INCOMPAT_FTYPE
231 */
232#define EXT2F_COMPAT_SUPP 0x0000
233#define EXT2F_ROCOMPAT_SUPP (EXT2F_ROCOMPAT_SPARSESUPER | \
234 EXT2F_ROCOMPAT_LARGEFILE | \
235 EXT2F_ROCOMPAT_EXTRA_ISIZE)
236#define EXT2F_INCOMPAT_SUPP EXT2F_INCOMPAT_FTYPE
237
238/* Assume that user mode programs are passing in an ext2fs superblock, not
239 * a kernel struct super_block. This will allow us to call the feature-test
240 * macros from user land. */
241#define EXT2_SB(sb) (sb)
242
243/*
244 * Feature set definitions
245 */
246#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
247 ( EXT2_SB(sb)->e2fs->e2fs_features_compat & htole32(mask) )
248#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
249 ( EXT2_SB(sb)->e2fs->e2fs_features_rocompat & htole32(mask) )
250#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
251 ( EXT2_SB(sb)->e2fs->e2fs_features_incompat & htole32(mask) )
252
253/*
| 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#define EXT2F_COMPAT_DIRHASHINDEX 0x0020
185
186#define EXT2F_ROCOMPAT_SPARSESUPER 0x0001
187#define EXT2F_ROCOMPAT_LARGEFILE 0x0002
188#define EXT2F_ROCOMPAT_BTREE_DIR 0x0004
189#define EXT2F_ROCOMPAT_HUGE_FILE 0x0008
190#define EXT2F_ROCOMPAT_GDT_CSUM 0x0010
191#define EXT2F_ROCOMPAT_DIR_NLINK 0x0020
192#define EXT2F_ROCOMPAT_EXTRA_ISIZE 0x0040
193
194#define EXT2F_INCOMPAT_COMP 0x0001
195#define EXT2F_INCOMPAT_FTYPE 0x0002
196#define EXT2F_INCOMPAT_META_BG 0x0010
197#define EXT2F_INCOMPAT_EXTENTS 0x0040
198#define EXT2F_INCOMPAT_64BIT 0x0080
199#define EXT2F_INCOMPAT_MMP 0x0100
200#define EXT2F_INCOMPAT_FLEX_BG 0x0200
201
202/*
203 * Features supported in this implementation
204 *
205 * We support the following REV1 features:
206 * - EXT2F_ROCOMPAT_SPARSESUPER
207 * - EXT2F_ROCOMPAT_LARGEFILE
208 * - EXT2F_INCOMPAT_FTYPE
209 */
210#define EXT2F_COMPAT_SUPP 0x0000
211#define EXT2F_ROCOMPAT_SUPP (EXT2F_ROCOMPAT_SPARSESUPER | \
212 EXT2F_ROCOMPAT_LARGEFILE | \
213 EXT2F_ROCOMPAT_EXTRA_ISIZE)
214#define EXT2F_INCOMPAT_SUPP EXT2F_INCOMPAT_FTYPE
215
216/* Assume that user mode programs are passing in an ext2fs superblock, not
217 * a kernel struct super_block. This will allow us to call the feature-test
218 * macros from user land. */
219#define EXT2_SB(sb) (sb)
220
221/*
222 * Feature set definitions
223 */
224#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
225 ( EXT2_SB(sb)->e2fs->e2fs_features_compat & htole32(mask) )
226#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
227 ( EXT2_SB(sb)->e2fs->e2fs_features_rocompat & htole32(mask) )
228#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
229 ( EXT2_SB(sb)->e2fs->e2fs_features_incompat & htole32(mask) )
230
231/*
|
254 * Definitions of behavior on errors
255 */
256#define E2FS_BEH_CONTINUE 1 /* continue operation */
257#define E2FS_BEH_READONLY 2 /* remount fs read only */
258#define E2FS_BEH_PANIC 3 /* cause panic */
259#define E2FS_BEH_DEFAULT E2FS_BEH_CONTINUE
260
261/*
262 * OS identification
263 */
264#define E2FS_OS_LINUX 0
265#define E2FS_OS_HURD 1
266#define E2FS_OS_MASIX 2
267#define E2FS_OS_FREEBSD 3
268#define E2FS_OS_LITES 4
269
270/*
| |
271 * File clean flags
272 */
273#define E2FS_ISCLEAN 0x0001 /* Unmounted cleanly */
274#define E2FS_ERRORS 0x0002 /* Errors detected */
275
276/* ext2 file system block group descriptor */
277
278struct ext2_gd {
279 uint32_t ext2bgd_b_bitmap; /* blocks bitmap block */
280 uint32_t ext2bgd_i_bitmap; /* inodes bitmap block */
281 uint32_t ext2bgd_i_tables; /* inodes table block */
282 uint16_t ext2bgd_nbfree; /* number of free blocks */
283 uint16_t ext2bgd_nifree; /* number of free inodes */
284 uint16_t ext2bgd_ndirs; /* number of directories */
285 uint16_t ext2bgd_flags; /* block group flags */
286 uint32_t ext2bgd_x_bitmap; /* snapshot exclusion bitmap loc. */
287 uint16_t ext2bgd_b_bmap_csum; /* block bitmap checksum */
288 uint16_t ext2bgd_i_bmap_csum; /* inode bitmap checksum */
289 uint16_t ext2bgd_i_unused; /* unused inode count */
290 uint16_t ext2bgd_csum; /* group descriptor checksum */
291};
292
| 232 * File clean flags
233 */
234#define E2FS_ISCLEAN 0x0001 /* Unmounted cleanly */
235#define E2FS_ERRORS 0x0002 /* Errors detected */
236
237/* ext2 file system block group descriptor */
238
239struct ext2_gd {
240 uint32_t ext2bgd_b_bitmap; /* blocks bitmap block */
241 uint32_t ext2bgd_i_bitmap; /* inodes bitmap block */
242 uint32_t ext2bgd_i_tables; /* inodes table block */
243 uint16_t ext2bgd_nbfree; /* number of free blocks */
244 uint16_t ext2bgd_nifree; /* number of free inodes */
245 uint16_t ext2bgd_ndirs; /* number of directories */
246 uint16_t ext2bgd_flags; /* block group flags */
247 uint32_t ext2bgd_x_bitmap; /* snapshot exclusion bitmap loc. */
248 uint16_t ext2bgd_b_bmap_csum; /* block bitmap checksum */
249 uint16_t ext2bgd_i_bmap_csum; /* inode bitmap checksum */
250 uint16_t ext2bgd_i_unused; /* unused inode count */
251 uint16_t ext2bgd_csum; /* group descriptor checksum */
252};
253
|
293/* cluster summary information */
| |
294
| 254
|
295struct csum {
296 int8_t cs_init; /* cluster summary has been initialized */
297 int32_t *cs_sum; /* cluster summary array */
298};
299
| |
300/* EXT2FS metadatas are stored in little-endian byte order. These macros
301 * helps reading these metadatas
302 */
303
304#define e2fs_cgload(old, new, size) memcpy((new), (old), (size));
305#define e2fs_cgsave(old, new, size) memcpy((new), (old), (size));
306
307/*
308 * Macro-instructions used to manage several block sizes
309 */
310#define EXT2_MAX_BLOCK_SIZE 4096
311#define EXT2_MIN_BLOCK_LOG_SIZE 10
312#define EXT2_BLOCK_SIZE(s) ((s)->e2fs_bsize)
313#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(uint32_t))
314#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->e2fs_isize)
315
316/*
317 * Macro-instructions used to manage fragments
318 */
319#define EXT2_MIN_FRAG_SIZE 1024
320#define EXT2_MAX_FRAG_SIZE 4096
321#define EXT2_MIN_FRAG_LOG_SIZE 10
322#define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->e2fs_fsize)
323#define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->e2fs_fpb)
324
325/*
326 * Macro-instructions used to manage group descriptors
327 */
328#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->e2fs_bpg)
329
330#endif /* !_FS_EXT2FS_EXT2FS_H_ */
| 255/* EXT2FS metadatas are stored in little-endian byte order. These macros
256 * helps reading these metadatas
257 */
258
259#define e2fs_cgload(old, new, size) memcpy((new), (old), (size));
260#define e2fs_cgsave(old, new, size) memcpy((new), (old), (size));
261
262/*
263 * Macro-instructions used to manage several block sizes
264 */
265#define EXT2_MAX_BLOCK_SIZE 4096
266#define EXT2_MIN_BLOCK_LOG_SIZE 10
267#define EXT2_BLOCK_SIZE(s) ((s)->e2fs_bsize)
268#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(uint32_t))
269#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->e2fs_isize)
270
271/*
272 * Macro-instructions used to manage fragments
273 */
274#define EXT2_MIN_FRAG_SIZE 1024
275#define EXT2_MAX_FRAG_SIZE 4096
276#define EXT2_MIN_FRAG_LOG_SIZE 10
277#define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->e2fs_fsize)
278#define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->e2fs_fpb)
279
280/*
281 * Macro-instructions used to manage group descriptors
282 */
283#define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->e2fs_bpg)
284
285#endif /* !_FS_EXT2FS_EXT2FS_H_ */
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