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34 * @(#)inode.h 8.9 (Berkeley) 5/14/95
38 #ifndef _UFS_UFS_INODE_H_
39 #define _UFS_UFS_INODE_H_
42 #include <sys/queue.h>
43 #include <ufs/ufs/dinode.h>
46 * This must agree with the definition in <ufs/ufs/dir.h>.
48 #define doff_t int32_t
51 * The inode is used to describe each active (or recently active) file in the
52 * UFS filesystem. It is composed of two types of information. The first part
53 * is the information that is needed only while the file is active (such as
54 * the identity of the file and linkage to speed its lookup). The second part
55 * is the permanent meta-data associated with the file which is read in
56 * from the permanent dinode from long term storage when the file becomes
57 * active, and is put back when the file is no longer being used.
59 * An inode may only be changed while holding either the exclusive
60 * vnode lock or the shared vnode lock and the vnode interlock. We use
61 * the latter only for "read" and "get" operations that require
62 * changing i_flag, or a timestamp. This locking protocol allows executing
63 * those operations without having to upgrade the vnode lock from shared to
67 TAILQ_ENTRY(inode) i_nextsnap; /* snapshot file list. */
68 struct vnode *i_vnode;/* Vnode associated with this inode. */
69 struct ufsmount *i_ump;/* Ufsmount point associated with this inode. */
70 struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */
72 struct dirhash *dirhash; /* Hashing for large directories. */
73 daddr_t *snapblklist; /* Collect expunged snapshot blocks. */
76 * The real copy of the on-disk inode.
79 struct ufs1_dinode *din1; /* UFS1 on-disk dinode. */
80 struct ufs2_dinode *din2; /* UFS2 on-disk dinode. */
83 ino_t i_number; /* The identity of the inode. */
84 u_int32_t i_flag; /* flags, see below */
85 int i_effnlink; /* i_nlink when I/O completes */
89 * Side effects; used during directory lookup.
91 int32_t i_count; /* Size of free slot in directory. */
92 doff_t i_endoff; /* End of useful stuff in directory. */
93 doff_t i_diroff; /* Offset in dir, where we found last entry. */
94 doff_t i_offset; /* Offset of free space in directory. */
96 int i_nextclustercg; /* last cg searched for cluster */
99 * Data for extended attribute modification.
101 u_char *i_ea_area; /* Pointer to malloced copy of EA area */
102 unsigned i_ea_len; /* Length of i_ea_area */
103 int i_ea_error; /* First errno in transaction */
104 int i_ea_refs; /* Number of users of EA area */
107 * Copies from the on-disk dinode itself.
109 u_int64_t i_size; /* File byte count. */
110 u_int64_t i_gen; /* Generation number. */
111 u_int32_t i_flags; /* Status flags (chflags). */
112 u_int32_t i_uid; /* File owner. */
113 u_int32_t i_gid; /* File group. */
114 u_int16_t i_mode; /* IFMT, permissions; see below. */
115 int16_t i_nlink; /* File link count. */
118 * These flags are kept in i_flag.
120 #define IN_ACCESS 0x0001 /* Access time update request. */
121 #define IN_CHANGE 0x0002 /* Inode change time update request. */
122 #define IN_UPDATE 0x0004 /* Modification time update request. */
123 #define IN_MODIFIED 0x0008 /* Inode has been modified. */
124 #define IN_NEEDSYNC 0x0010 /* Inode requires fsync. */
125 #define IN_LAZYMOD 0x0020 /* Modified, but don't write yet. */
126 #define IN_LAZYACCESS 0x0040 /* Process IN_ACCESS after the
127 suspension finished */
128 #define IN_EA_LOCKED 0x0080
129 #define IN_EA_LOCKWAIT 0x0100
131 #define IN_TRUNCATED 0x0200 /* Journaled truncation pending. */
133 #define IN_UFS2 0x0400 /* UFS2 vs UFS1 */
135 #define i_dirhash i_un.dirhash
136 #define i_snapblklist i_un.snapblklist
137 #define i_din1 dinode_u.din1
138 #define i_din2 dinode_u.din2
142 #define ITOUMP(ip) ((ip)->i_ump)
143 #define ITODEV(ip) (ITOUMP(ip)->um_dev)
144 #define ITODEVVP(ip) (ITOUMP(ip)->um_devvp)
145 #define ITOFS(ip) (ITOUMP(ip)->um_fs)
146 #define ITOVFS(ip) ((ip)->i_vnode->v_mount)
149 I_IS_UFS1(const struct inode *ip)
152 return ((ip->i_flag & IN_UFS2) == 0);
156 I_IS_UFS2(const struct inode *ip)
159 return ((ip->i_flag & IN_UFS2) != 0);
163 * The DIP macro is used to access fields in the dinode that are
164 * not cached in the inode itself.
166 #define DIP(ip, field) (I_IS_UFS1(ip) ? (ip)->i_din1->d##field : \
167 (ip)->i_din2->d##field)
168 #define DIP_SET(ip, field, val) do { \
170 (ip)->i_din1->d##field = (val); \
172 (ip)->i_din2->d##field = (val); \
175 #define SHORTLINK(ip) (I_IS_UFS1(ip) ? \
176 (caddr_t)(ip)->i_din1->di_db : (caddr_t)(ip)->i_din2->di_db)
177 #define IS_SNAPSHOT(ip) ((ip)->i_flags & SF_SNAPSHOT)
180 * Structure used to pass around logical block paths generated by
181 * ufs_getlbns and used by truncate and bmap code.
184 ufs2_daddr_t in_lbn; /* Logical block number. */
185 int in_off; /* Offset in buffer. */
188 /* Convert between inode pointers and vnode pointers. */
189 #define VTOI(vp) ((struct inode *)(vp)->v_data)
190 #define ITOV(ip) ((ip)->i_vnode)
192 /* Determine if soft dependencies are being done */
193 #define DOINGSOFTDEP(vp) ((vp)->v_mount->mnt_flag & (MNT_SOFTDEP | MNT_SUJ))
194 #define MOUNTEDSOFTDEP(mp) ((mp)->mnt_flag & (MNT_SOFTDEP | MNT_SUJ))
195 #define DOINGSUJ(vp) ((vp)->v_mount->mnt_flag & MNT_SUJ)
196 #define MOUNTEDSUJ(mp) ((mp)->mnt_flag & MNT_SUJ)
198 /* This overlays the fid structure (see mount.h). */
200 u_int16_t ufid_len; /* Length of structure. */
201 u_int16_t ufid_pad; /* Force 32-bit alignment. */
202 uint32_t ufid_ino; /* File number (ino). */
203 uint32_t ufid_gen; /* Generation number. */
207 #endif /* !_UFS_UFS_INODE_H_ */