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34 * @(#)inode.h 8.9 (Berkeley) 5/14/95
38 #ifndef _SYS_GNU_EXT2FS_INODE_H_
39 #define _SYS_GNU_EXT2FS_INODE_H_
42 #include <sys/queue.h>
44 #define ROOTINO ((ino_t)2)
46 #define NDADDR 12 /* Direct addresses in inode. */
47 #define NIADDR 3 /* Indirect addresses in inode. */
50 * This must agree with the definition in <ufs/ufs/dir.h>.
52 #define doff_t int32_t
55 * The inode is used to describe each active (or recently active) file in the
56 * EXT2FS filesystem. It is composed of two types of information. The first
57 * part is the information that is needed only while the file is active (such
58 * as the identity of the file and linkage to speed its lookup). The second
59 * part is the permanent meta-data associated with the file which is read in
60 * from the permanent dinode from long term storage when the file becomes
61 * active, and is put back when the file is no longer being used.
64 struct vnode *i_vnode;/* Vnode associated with this inode. */
65 struct vnode *i_devvp;/* Vnode for block I/O. */
66 u_int32_t i_flag; /* flags, see below */
67 ino_t i_number; /* The identity of the inode. */
69 struct ext2_sb_info *i_e2fs; /* EXT2FS */
70 u_quad_t i_modrev; /* Revision level for NFS lease. */
72 * Side effects; used during directory lookup.
74 int32_t i_count; /* Size of free slot in directory. */
75 doff_t i_endoff; /* End of useful stuff in directory. */
76 doff_t i_diroff; /* Offset in dir, where we found last entry. */
77 doff_t i_offset; /* Offset of free space in directory. */
78 ino_t i_ino; /* Inode number of found directory. */
79 u_int32_t i_reclen; /* Size of found directory entry. */
81 u_int32_t i_block_group;
82 u_int32_t i_next_alloc_block;
83 u_int32_t i_next_alloc_goal;
84 u_int32_t i_prealloc_block;
85 u_int32_t i_prealloc_count;
87 /* Fields from struct dinode in UFS. */
88 u_int16_t i_mode; /* IFMT, permissions; see below. */
89 int16_t i_nlink; /* File link count. */
90 u_int64_t i_size; /* File byte count. */
91 int32_t i_atime; /* Last access time. */
92 int32_t i_atimensec; /* Last access time. */
93 int32_t i_mtime; /* Last modified time. */
94 int32_t i_mtimensec; /* Last modified time. */
95 int32_t i_ctime; /* Last inode change time. */
96 int32_t i_ctimensec; /* Last inode change time. */
97 int32_t i_db[NDADDR]; /* Direct disk blocks. */
98 int32_t i_ib[NIADDR]; /* Indirect disk blocks. */
99 u_int32_t i_flags; /* Status flags (chflags). */
100 int32_t i_blocks; /* Blocks actually held. */
101 int32_t i_gen; /* Generation number. */
102 u_int32_t i_uid; /* File owner. */
103 u_int32_t i_gid; /* File group. */
107 * The di_db fields may be overlaid with other information for
108 * file types that do not have associated disk storage. Block
109 * and character devices overlay the first data block with their
110 * dev_t value. Short symbolic links place their path in the
113 #define i_shortlink i_db
114 #define i_rdev i_db[0]
115 #define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(int32_t))
117 /* File permissions. */
118 #define IEXEC 0000100 /* Executable. */
119 #define IWRITE 0000200 /* Writeable. */
120 #define IREAD 0000400 /* Readable. */
121 #define ISVTX 0001000 /* Sticky bit. */
122 #define ISGID 0002000 /* Set-gid. */
123 #define ISUID 0004000 /* Set-uid. */
126 #define IFMT 0170000 /* Mask of file type. */
127 #define IFIFO 0010000 /* Named pipe (fifo). */
128 #define IFCHR 0020000 /* Character device. */
129 #define IFDIR 0040000 /* Directory file. */
130 #define IFBLK 0060000 /* Block device. */
131 #define IFREG 0100000 /* Regular file. */
132 #define IFLNK 0120000 /* Symbolic link. */
133 #define IFSOCK 0140000 /* UNIX domain socket. */
134 #define IFWHT 0160000 /* Whiteout. */
136 /* These flags are kept in i_flag. */
137 #define IN_ACCESS 0x0001 /* Access time update request. */
138 #define IN_CHANGE 0x0002 /* Inode change time update request. */
139 #define IN_UPDATE 0x0004 /* Modification time update request. */
140 #define IN_MODIFIED 0x0008 /* Inode has been modified. */
141 #define IN_RENAME 0x0010 /* Inode is being renamed. */
142 #define IN_HASHED 0x0020 /* Inode is on hash list */
143 #define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */
144 #define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */
148 * Structure used to pass around logical block paths generated by
149 * ext2_getlbns and used by truncate and bmap code.
152 int32_t in_lbn; /* Logical block number. */
153 int in_off; /* Offset in buffer. */
154 int in_exists; /* Flag if the block exists. */
157 /* Convert between inode pointers and vnode pointers. */
158 #define VTOI(vp) ((struct inode *)(vp)->v_data)
159 #define ITOV(ip) ((ip)->i_vnode)
161 /* This overlays the fid structure (see mount.h). */
163 u_int16_t ufid_len; /* Length of structure. */
164 u_int16_t ufid_pad; /* Force 32-bit alignment. */
165 ino_t ufid_ino; /* File number (ino). */
166 int32_t ufid_gen; /* Generation number. */
170 #endif /* !_SYS_GNU_EXT2FS_INODE_H_ */