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34 * @(#)inode.h 8.9 (Berkeley) 5/14/95
38 #ifndef _FS_EXT2FS_INODE_H_
39 #define _FS_EXT2FS_INODE_H_
41 #include <sys/param.h>
43 #include <sys/mutex.h>
44 #include <sys/queue.h>
46 #include <fs/ext2fs/ext2_extents.h>
49 * This must agree with the definition in <ufs/ufs/dir.h>.
51 #define doff_t int32_t
53 #define NDADDR 12 /* Direct addresses in inode. */
54 #define NIADDR 3 /* Indirect addresses in inode. */
57 * The size of physical and logical block numbers and time fields in UFS.
59 typedef int32_t e2fs_lbn_t;
62 * The inode is used to describe each active (or recently active) file in the
63 * EXT2FS filesystem. It is composed of two types of information. The first
64 * part is the information that is needed only while the file is active (such
65 * as the identity of the file and linkage to speed its lookup). The second
66 * part is the permanent meta-data associated with the file which is read in
67 * from the permanent dinode from long term storage when the file becomes
68 * active, and is put back when the file is no longer being used.
71 struct vnode *i_vnode;/* Vnode associated with this inode. */
72 struct ext2mount *i_ump;
73 uint32_t i_flag; /* flags, see below */
74 ino_t i_number; /* The identity of the inode. */
76 struct m_ext2fs *i_e2fs; /* EXT2FS */
77 u_quad_t i_modrev; /* Revision level for NFS lease. */
79 * Side effects; used during directory lookup.
81 int32_t i_count; /* Size of free slot in directory. */
82 doff_t i_endoff; /* End of useful stuff in directory. */
83 doff_t i_diroff; /* Offset in dir, where we found last entry. */
84 doff_t i_offset; /* Offset of free space in directory. */
86 uint32_t i_block_group;
87 uint32_t i_next_alloc_block;
88 uint32_t i_next_alloc_goal;
90 /* Fields from struct dinode in UFS. */
91 uint16_t i_mode; /* IFMT, permissions; see below. */
92 int16_t i_nlink; /* File link count. */
93 uint32_t i_uid; /* File owner. */
94 uint32_t i_gid; /* File group. */
95 uint64_t i_size; /* File byte count. */
96 uint64_t i_blocks; /* Blocks actually held. */
97 int32_t i_atime; /* Last access time. */
98 int32_t i_mtime; /* Last modified time. */
99 int32_t i_ctime; /* Last inode change time. */
100 int32_t i_birthtime; /* Inode creation time. */
101 int32_t i_mtimensec; /* Last modified time. */
102 int32_t i_atimensec; /* Last access time. */
103 int32_t i_ctimensec; /* Last inode change time. */
104 int32_t i_birthnsec; /* Inode creation time. */
105 uint32_t i_gen; /* Generation number. */
106 uint32_t i_flags; /* Status flags (chflags). */
107 uint32_t i_db[NDADDR]; /* Direct disk blocks. */
108 uint32_t i_ib[NIADDR]; /* Indirect disk blocks. */
110 struct ext4_extent_cache i_ext_cache; /* cache for ext4 extent */
114 * The di_db fields may be overlaid with other information for
115 * file types that do not have associated disk storage. Block
116 * and character devices overlay the first data block with their
117 * dev_t value. Short symbolic links place their path in the
120 #define i_shortlink i_db
121 #define i_rdev i_db[0]
123 /* File permissions. */
124 #define IEXEC 0000100 /* Executable. */
125 #define IWRITE 0000200 /* Writeable. */
126 #define IREAD 0000400 /* Readable. */
127 #define ISVTX 0001000 /* Sticky bit. */
128 #define ISGID 0002000 /* Set-gid. */
129 #define ISUID 0004000 /* Set-uid. */
132 #define IFMT 0170000 /* Mask of file type. */
133 #define IFIFO 0010000 /* Named pipe (fifo). */
134 #define IFCHR 0020000 /* Character device. */
135 #define IFDIR 0040000 /* Directory file. */
136 #define IFBLK 0060000 /* Block device. */
137 #define IFREG 0100000 /* Regular file. */
138 #define IFLNK 0120000 /* Symbolic link. */
139 #define IFSOCK 0140000 /* UNIX domain socket. */
140 #define IFWHT 0160000 /* Whiteout. */
142 /* These flags are kept in i_flag. */
143 #define IN_ACCESS 0x0001 /* Access time update request. */
144 #define IN_CHANGE 0x0002 /* Inode change time update request. */
145 #define IN_UPDATE 0x0004 /* Modification time update request. */
146 #define IN_MODIFIED 0x0008 /* Inode has been modified. */
147 #define IN_RENAME 0x0010 /* Inode is being renamed. */
148 #define IN_HASHED 0x0020 /* Inode is on hash list */
149 #define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */
150 #define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */
151 #define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the
152 suspension finished */
154 #define i_devvp i_ump->um_devvp
158 * Structure used to pass around logical block paths generated by
159 * ext2_getlbns and used by truncate and bmap code.
162 e2fs_lbn_t in_lbn; /* Logical block number. */
163 int in_off; /* Offset in buffer. */
166 /* Convert between inode pointers and vnode pointers. */
167 #define VTOI(vp) ((struct inode *)(vp)->v_data)
168 #define ITOV(ip) ((ip)->i_vnode)
170 /* This overlays the fid structure (see mount.h). */
172 uint16_t ufid_len; /* Length of structure. */
173 uint16_t ufid_pad; /* Force 32-bit alignment. */
174 ino_t ufid_ino; /* File number (ino). */
175 uint32_t ufid_gen; /* Generation number. */
179 #endif /* !_FS_EXT2FS_INODE_H_ */