144 lines
6.0 KiB
C
144 lines
6.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2009 Aditya Sarawgi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _FS_EXT2FS_EXT2_DINODE_H_
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#define _FS_EXT2FS_EXT2_DINODE_H_
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/*
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* Special inode numbers
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* The root inode is the root of the file system. Inode 0 can't be used for
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* normal purposes and bad blocks are normally linked to inode 1, thus
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* the root inode is 2.
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* Inode 3 to 10 are reserved in ext2fs.
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*/
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#define EXT2_BADBLKINO ((ino_t)1)
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#define EXT2_ROOTINO ((ino_t)2)
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#define EXT2_ACLIDXINO ((ino_t)3)
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#define EXT2_ACLDATAINO ((ino_t)4)
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#define EXT2_BOOTLOADERINO ((ino_t)5)
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#define EXT2_UNDELDIRINO ((ino_t)6)
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#define EXT2_RESIZEINO ((ino_t)7)
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#define EXT2_JOURNALINO ((ino_t)8)
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#define EXT2_EXCLUDEINO ((ino_t)9)
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#define EXT2_REPLICAINO ((ino_t)10)
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#define EXT2_FIRSTINO ((ino_t)11)
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/*
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* Inode flags
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* The system supports EXT2_IMMUTABLE, EXT2_APPEND and EXT2_NODUMP flags.
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* The current implementation also uses EXT3_INDEX, EXT4_EXTENTS and
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* EXT4_HUGE_FILE with some restrictions imposed by the lack of write
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* support.
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*/
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#define EXT2_SECRM 0x00000001 /* Secure deletion */
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#define EXT2_UNRM 0x00000002 /* Undelete */
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#define EXT2_COMPR 0x00000004 /* Compress file */
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#define EXT2_SYNC 0x00000008 /* Synchronous updates */
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#define EXT2_IMMUTABLE 0x00000010 /* Immutable file */
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#define EXT2_APPEND 0x00000020 /* Writes to file may only append */
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#define EXT2_NODUMP 0x00000040 /* Do not dump file */
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#define EXT2_NOATIME 0x00000080 /* Do not update atime */
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#define EXT3_INDEX 0x00001000 /* Hash-indexed directory */
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#define EXT4_IMAGIC 0x00002000 /* AFS directory */
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#define EXT4_JOURNAL_DATA 0x00004000 /* File data should be journaled */
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#define EXT4_NOTAIL 0x00008000 /* File tail should not be merged */
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#define EXT4_DIRSYNC 0x00010000 /* Dirsync behaviour */
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#define EXT4_TOPDIR 0x00020000 /* Top of directory hierarchies*/
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#define EXT4_HUGE_FILE 0x00040000 /* Set to each huge file */
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#define EXT4_EXTENTS 0x00080000 /* Inode uses extents */
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#define EXT4_EA_INODE 0x00200000 /* Inode used for large EA */
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#define EXT4_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */
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#define EXT4_INLINE_DATA 0x10000000 /* Inode has inline data */
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#define EXT4_PROJINHERIT 0x20000000 /* Children inherit project ID */
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/*
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* Definitions for nanosecond timestamps.
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* Ext3 inode versioning, 2006-12-13.
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*/
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#define EXT3_EPOCH_BITS 2
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#define EXT3_EPOCH_MASK ((1 << EXT3_EPOCH_BITS) - 1)
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#define EXT3_NSEC_MASK (~0UL << EXT3_EPOCH_BITS)
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#define E2DI_HAS_XTIME(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \
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EXT2F_ROCOMPAT_EXTRA_ISIZE))
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#define E2DI_HAS_HUGE_FILE(ip) (EXT2_HAS_RO_COMPAT_FEATURE(ip->i_e2fs, \
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EXT2F_ROCOMPAT_HUGE_FILE))
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/*
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* Constants relative to the data blocks
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*/
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#define EXT2_NDIR_BLOCKS 12
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#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
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#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
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#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
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#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
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#define EXT2_MAXSYMLINKLEN (EXT2_N_BLOCKS * sizeof(uint32_t))
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/*
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* Structure of an inode on the disk
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*/
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struct ext2fs_dinode {
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uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */
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uint16_t e2di_uid; /* 2: Owner UID */
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uint32_t e2di_size; /* 4: Size (in bytes) */
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uint32_t e2di_atime; /* 8: Access time */
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uint32_t e2di_ctime; /* 12: Change time */
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uint32_t e2di_mtime; /* 16: Modification time */
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uint32_t e2di_dtime; /* 20: Deletion time */
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uint16_t e2di_gid; /* 24: Owner GID */
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uint16_t e2di_nlink; /* 26: File link count */
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uint32_t e2di_nblock; /* 28: Blocks count */
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uint32_t e2di_flags; /* 32: Status flags (chflags) */
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uint32_t e2di_version; /* 36: Low 32 bits inode version */
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uint32_t e2di_blocks[EXT2_N_BLOCKS]; /* 40: disk blocks */
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uint32_t e2di_gen; /* 100: generation number */
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uint32_t e2di_facl; /* 104: Low EA block */
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uint32_t e2di_size_high; /* 108: Upper bits of file size */
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uint32_t e2di_faddr; /* 112: Fragment address (obsolete) */
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uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 */
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uint16_t e2di_facl_high; /* 118: File EA bits 47:32 */
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uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits */
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uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits */
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uint16_t e2di_chksum_lo; /* 124: Lower inode checksum */
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uint16_t e2di_lx_reserved; /* 126: Unused */
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uint16_t e2di_extra_isize; /* 128: Size of this inode */
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uint16_t e2di_chksum_hi; /* 130: High inode checksum */
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uint32_t e2di_ctime_extra; /* 132: Extra change time */
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uint32_t e2di_mtime_extra; /* 136: Extra modification time */
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uint32_t e2di_atime_extra; /* 140: Extra access time */
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uint32_t e2di_crtime; /* 144: Creation (birth)time */
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uint32_t e2di_crtime_extra; /* 148: Extra creation (birth)time */
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uint32_t e2di_version_hi; /* 152: High bits of inode version */
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uint32_t e2di_projid; /* 156: Project ID */
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};
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#endif /* !_FS_EXT2FS_EXT2_DINODE_H_ */
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