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 *
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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 {
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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 */
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93 /* EXT2_DYNAMIC_REV superblocks */
| 93 /* EXT2_DYNAMIC_REV superblocks */
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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 */
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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;
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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 */
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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 */
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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 */
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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 */
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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 */
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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 {
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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];
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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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