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34 * @(#)dinode.h 8.3 (Berkeley) 1/21/94
35 * %FreeBSD: src/sys/ufs/ufs/dinode.h,v 1.7 1999/08/28 00:52:27 peter Exp %
39 #ifndef _UFS_UFS_DINODE_H_
40 #define _UFS_UFS_DINODE_H_
43 * The root inode is the root of the file system. Inode 0 can't be used for
44 * normal purposes and historically bad blocks were linked to inode 1, thus
45 * the root inode is 2. (Inode 1 is no longer used for this purpose, however
46 * numerous dump tapes make this assumption, so we are stuck with it).
48 #define ROOTINO ((ino_t)2)
51 * The Whiteout inode# is a dummy non-zero inode number which will
52 * never be allocated to a real file. It is used as a place holder
53 * in the directory entry which has been tagged as a DT_W entry.
54 * See the comments about ROOTINO above.
56 #define WINO ((ino_t)1)
59 * A dinode contains all the meta-data associated with a UFS file.
60 * This structure defines the on-disk format of a dinode. Since
61 * this structure describes an on-disk structure, all its fields
62 * are defined by types with precise widths.
65 /* typedef int32_t ufs_daddr_t; */
66 #define NDADDR 12 /* Direct addresses in inode. */
67 #define NIADDR 3 /* Indirect addresses in inode. */
70 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
71 int16_t di_nlink; /* 2: File link count. */
73 u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
74 int32_t inumber; /* 4: Lfs: inode number. */
76 u_int64_t di_size; /* 8: File byte count. */
77 int32_t di_atime; /* 16: Last access time. */
78 int32_t di_atimensec; /* 20: Last access time. */
79 int32_t di_mtime; /* 24: Last modified time. */
80 int32_t di_mtimensec; /* 28: Last modified time. */
81 int32_t di_ctime; /* 32: Last inode change time. */
82 int32_t di_ctimensec; /* 36: Last inode change time. */
83 ufs_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */
84 ufs_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
85 u_int32_t di_flags; /* 100: Status flags (chflags). */
86 int32_t di_blocks; /* 104: Blocks actually held. */
87 int32_t di_gen; /* 108: Generation number. */
88 u_int32_t di_uid; /* 112: File owner. */
89 u_int32_t di_gid; /* 116: File group. */
90 int32_t di_spare[2]; /* 120: Reserved; currently unused */
94 * The di_db fields may be overlaid with other information for
95 * file types that do not have associated disk storage. Block
96 * and character devices overlay the first data block with their
97 * dev_t value. Short symbolic links place their path in the
100 #define di_inumber di_u.inumber
101 #define di_ogid di_u.oldids[1]
102 #define di_ouid di_u.oldids[0]
103 #define di_rdev di_db[0]
104 #define di_shortlink di_db
105 #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(ufs_daddr_t))
107 /* File permissions. */
108 #define IEXEC 0000100 /* Executable. */
109 #define IWRITE 0000200 /* Writeable. */
110 #define IREAD 0000400 /* Readable. */
111 #define ISVTX 0001000 /* Sticky bit. */
112 #define ISGID 0002000 /* Set-gid. */
113 #define ISUID 0004000 /* Set-uid. */
116 #define IFMT 0170000 /* Mask of file type. */
117 #define IFIFO 0010000 /* Named pipe (fifo). */
118 #define IFCHR 0020000 /* Character device. */
119 #define IFDIR 0040000 /* Directory file. */
120 #define IFBLK 0060000 /* Block device. */
121 #define IFREG 0100000 /* Regular file. */
122 #define IFLNK 0120000 /* Symbolic link. */
123 #define IFSOCK 0140000 /* UNIX domain socket. */
124 #define IFWHT 0160000 /* Whiteout. */