/* $NetBSD: ext2fs_dinode.h,v 1.37 2017/01/13 18:04:36 christos Exp $ */ /* * Copyright (c) 1982, 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)dinode.h 8.6 (Berkeley) 9/13/94 * Modified for ext2fs by Manuel Bouyer. */ /* * Copyright (c) 1997 Manuel Bouyer. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * @(#)dinode.h 8.6 (Berkeley) 9/13/94 * Modified for ext2fs by Manuel Bouyer. */ #ifndef _UFS_EXT2FS_EXT2FS_DINODE_H_ #define _UFS_EXT2FS_EXT2FS_DINODE_H_ #if !defined(_KERNEL) && !defined(_STANDALONE) #include <stddef.h> /* for offsetof */ #endif #include <sys/stat.h> /* * The root inode is the root of the file system. Inode 0 can't be used for * normal purposes and bad blocks are normally linked to inode 1, thus * the root inode is 2. * Inode 3 to 10 are reserved in ext2fs. */ #define EXT2_BADBLKINO ((ino_t)1) #define EXT2_ROOTINO ((ino_t)2) #define EXT2_ACLIDXINO ((ino_t)3) #define EXT2_ACLDATAINO ((ino_t)4) #define EXT2_BOOTLOADERINO ((ino_t)5) #define EXT2_UNDELDIRINO ((ino_t)6) #define EXT2_RESIZEINO ((ino_t)7) #define EXT2_JOURNALINO ((ino_t)8) #define EXT2_FIRSTINO ((ino_t)11) /* * A dinode contains all the meta-data associated with a UFS file. * This structure defines the on-disk format of a dinode. Since * this structure describes an on-disk structure, all its fields * are defined by types with precise widths. */ /* * XXX these are the same values as UFS_NDADDR/UFS_NIADDR and it is * far from clear that there isn't code that relies on them being the * same. */ #define EXT2FS_NDADDR 12 /* Direct addresses in inode. */ #define EXT2FS_NIADDR 3 /* Indirect addresses in inode. */ #define EXT2_MAXSYMLINKLEN ((EXT2FS_NDADDR+EXT2FS_NIADDR) * sizeof (uint32_t)) #define E2MAXSYMLINKLEN EXT2_MAXSYMLINKLEN struct ext2fs_dinode { uint16_t e2di_mode; /* 0: IFMT, permissions; see below. */ uint16_t e2di_uid; /* 2: Owner UID */ uint32_t e2di_size; /* 4: Size (in bytes) */ uint32_t e2di_atime; /* 8: Access time */ uint32_t e2di_ctime; /* 12: Create time */ uint32_t e2di_mtime; /* 16: Modification time */ uint32_t e2di_dtime; /* 20: Deletion time */ uint16_t e2di_gid; /* 24: Owner GID */ uint16_t e2di_nlink; /* 26: File link count */ uint32_t e2di_nblock; /* 28: Blocks count */ uint32_t e2di_flags; /* 32: Status flags (chflags) */ uint32_t e2di_version; /* 36: was reserved1 */ uint32_t e2di_blocks[EXT2FS_NDADDR+EXT2FS_NIADDR]; /* 40: disk blocks */ uint32_t e2di_gen; /* 100: generation number */ uint32_t e2di_facl; /* 104: file ACL (ext3) */ uint32_t e2di_size_high; /* 108: Size (in bytes) high */ uint32_t e2di_obso_faddr;/* 112: obsolete fragment address (ext2) */ uint16_t e2di_nblock_high; /* 116: Blocks count bits 47:32 (ext4) */ uint16_t e2di_facl_high; /* 118: file ACL bits 47:32 (ext4/64bit) */ uint16_t e2di_uid_high; /* 120: Owner UID top 16 bits (ext4) */ uint16_t e2di_gid_high; /* 122: Owner GID top 16 bits (ext4) */ uint16_t e2di_checksum_low; /* 124: crc LE (not implemented) (ext4) */ uint16_t e2di_reserved; /* 126: reserved */ uint16_t e2di_extra_isize; /* 128: inode extra size (over 128) actually used (ext4) */ uint16_t e2di_checksum_high; /* 130: crc BE (not implemented) (ext4) */ uint32_t e2di_ctime_extra; /* 132: ctime (nsec << 2 | high epoch) (ext4) */ uint32_t e2di_mtime_extra; /* 136: mtime (nsec << 2 | high epoch) (ext4) */ uint32_t e2di_atime_extra; /* 140: atime (nsec << 2 | high epoch) (ext4) */ uint32_t e2di_crtime; /* 144: creation time (epoch) (ext4) */ uint32_t e2di_crtime_extra; /* 148: creation time (nsec << 2 | high epoch) (ext4) */ uint32_t e2di_version_high; /* 152: version high (ext4) */ uint32_t e2di_projid; /* 156: project id (not implemented) (ext4) */ }; #define i_e2fs_mode i_din.e2fs_din->e2di_mode #define i_e2fs_uid i_din.e2fs_din->e2di_uid #define i_e2fs_size i_din.e2fs_din->e2di_size #define i_e2fs_atime i_din.e2fs_din->e2di_atime #define i_e2fs_ctime i_din.e2fs_din->e2di_ctime #define i_e2fs_mtime i_din.e2fs_din->e2di_mtime #define i_e2fs_dtime i_din.e2fs_din->e2di_dtime #define i_e2fs_gid i_din.e2fs_din->e2di_gid #define i_e2fs_nlink i_din.e2fs_din->e2di_nlink #define i_e2fs_nblock i_din.e2fs_din->e2di_nblock #define i_e2fs_flags i_din.e2fs_din->e2di_flags #define i_e2fs_version i_din.e2fs_din->e2di_version #define i_e2fs_blocks i_din.e2fs_din->e2di_blocks #define i_e2fs_rdev i_din.e2fs_din->e2di_rdev #define i_e2fs_gen i_din.e2fs_din->e2di_gen #define i_e2fs_facl i_din.e2fs_din->e2di_facl #define i_e2fs_nblock_high i_din.e2fs_din->e2di_nblock_high #define i_e2fs_facl_high i_din.e2fs_din->e2di_facl_high #define i_e2fs_uid_high i_din.e2fs_din->e2di_uid_high #define i_e2fs_gid_high i_din.e2fs_din->e2di_gid_high /* File permissions. */ #define EXT2_IEXEC 0000100 /* Executable. */ #define EXT2_IWRITE 0000200 /* Writable. */ #define EXT2_IREAD 0000400 /* Readable. */ #define EXT2_ISVTX 0001000 /* Sticky bit. */ #define EXT2_ISGID 0002000 /* Set-gid. */ #define EXT2_ISUID 0004000 /* Set-uid. */ /* File types. */ #define EXT2_IFMT 0170000 /* Mask of file type. */ #define EXT2_IFIFO 0010000 /* Named pipe (fifo). */ #define EXT2_IFCHR 0020000 /* Character device. */ #define EXT2_IFDIR 0040000 /* Directory file. */ #define EXT2_IFBLK 0060000 /* Block device. */ #define EXT2_IFREG 0100000 /* Regular file. */ #define EXT2_IFLNK 0120000 /* Symbolic link. */ #define EXT2_IFSOCK 0140000 /* UNIX domain socket. */ /* file flags */ #define EXT2_SECRM 0x00000001 /* Secure deletion */ #define EXT2_UNRM 0x00000002 /* Undelete */ #define EXT2_COMPR 0x00000004 /* Compress file */ #define EXT2_SYNC 0x00000008 /* Synchronous updates */ #define EXT2_IMMUTABLE 0x00000010 /* Immutable file */ #define EXT2_APPEND 0x00000020 /* writes to file may only append */ #define EXT2_NODUMP 0x00000040 /* do not dump file */ #define EXT2_NOATIME 0x00000080 /* do not update atime */ #define EXT2_INDEX 0x00001000 /* hash-indexed directory */ #define EXT2_IMAGIC 0x00002000 /* AFS directory */ #define EXT2_JOURNAL_DATA 0x00004000 /* file data should be journaled */ #define EXT2_NOTAIL 0x00008000 /* file tail should not be merged */ #define EXT2_DIRSYNC 0x00010000 /* dirsync behaviour */ #define EXT2_TOPDIR 0x00020000 /* Top of directory hierarchies*/ #define EXT2_HUGE_FILE 0x00040000 /* Set to each huge file */ #define EXT2_EXTENTS 0x00080000 /* Inode uses extents */ #define EXT2_EA_INODE 0x00200000 /* Inode used for large EA */ #define EXT2_EOFBLOCKS 0x00400000 /* Blocks allocated beyond EOF */ #define EXT2_INLINE_DATA 0x10000000 /* Inode has inline data */ #define EXT2_PROJINHERIT 0x20000000 /* Children inherit project ID */ /* Size of on-disk inode. */ #define EXT2_REV0_DINODE_SIZE 128U #define EXT2_DINODE_SIZE(fs) ((fs)->e2fs.e2fs_rev > E2FS_REV0 ? \ (fs)->e2fs.e2fs_inode_size : \ EXT2_REV0_DINODE_SIZE) #define EXT2_DINODE_FITS(dinode, field, isize) (\ (isize > EXT2_REV0_DINODE_SIZE) \ && ((EXT2_REV0_DINODE_SIZE + (dinode)->e2di_extra_isize) >= offsetof(struct ext2fs_dinode, field) + sizeof((dinode)->field)) \ ) /* * Time encoding * Lower two bits of extra field are extra high bits for epoch; unfortunately still, Linux kernels treat 11 there as 00 for compatibility * Rest of extra fields are nanoseconds */ static __inline void ext2fs_dinode_time_get(struct timespec *ts, uint32_t epoch, uint32_t extra) { ts->tv_sec = (signed) epoch; if (extra) { uint64_t epoch_bits = extra & 0x3; /* XXX compatibility with linux kernel < 4.20 */ if (epoch_bits == 3 && ts->tv_sec < 0) epoch_bits = 0; ts->tv_sec |= epoch_bits << 32; ts->tv_nsec = extra >> 2; } else { ts->tv_nsec = 0; } } #define EXT2_DINODE_TIME_GET(ts, dinode, field, isize) \ ext2fs_dinode_time_get(ts, (dinode)->field, \ EXT2_DINODE_FITS(dinode, field ## _extra, isize) \ ? (dinode)->field ## _extra : 0 \ ) static __inline void ext2fs_dinode_time_set(const struct timespec *ts, uint32_t *epoch, uint32_t *extra) { *epoch = (int32_t) ts->tv_sec; if (extra) { uint32_t epoch_bits = (ts->tv_sec >> 32) & 0x3; *extra = (ts->tv_nsec << 2) | epoch_bits; } } #define EXT2_DINODE_TIME_SET(ts, dinode, field, isize) \ ext2fs_dinode_time_set(ts, &(dinode)->field, \ EXT2_DINODE_FITS(dinode, field ## _extra, isize) \ ? &(dinode)->field ## _extra : NULL \ ) /* * The e2di_blocks fields may be overlaid with other information for * file types that do not have associated disk storage. Block * and character devices overlay the first data block with their * dev_t value. Short symbolic links place their path in the * di_db area. */ #define e2di_rdev e2di_blocks[0] #define e2di_shortlink e2di_blocks /* e2fs needs byte swapping on big-endian systems */ #if BYTE_ORDER == LITTLE_ENDIAN # define e2fs_iload(old, new, isize) \ memcpy((new),(old),(isize)) # define e2fs_isave(old, new, isize) \ memcpy((new),(old),(isize)) #else void e2fs_i_bswap(struct ext2fs_dinode *, struct ext2fs_dinode *, size_t); # define e2fs_iload(old, new, isize) e2fs_i_bswap((old), (new), (isize)) # define e2fs_isave(old, new, isize) e2fs_i_bswap((old), (new), (isize)) #endif #endif /* !_UFS_EXT2FS_EXT2FS_DINODE_H_ */
