2 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 #ifndef __XFS_DINODE_H__
19 #define __XFS_DINODE_H__
24 #define XFS_DINODE_VERSION_1 1
25 #define XFS_DINODE_VERSION_2 2
26 #define XFS_DINODE_GOOD_VERSION(v) \
27 (((v) == XFS_DINODE_VERSION_1 || (v) == XFS_DINODE_VERSION_2))
28 #define XFS_DINODE_MAGIC 0x494e /* 'IN' */
31 * Disk inode structure.
32 * This is just the header; the inode is expanded to fill a variable size
33 * with the last field expanding. It is split into the core and "other"
34 * because we only need the core part in the in-core inode.
36 typedef struct xfs_timestamp {
37 __be32 t_sec; /* timestamp seconds */
38 __be32 t_nsec; /* timestamp nanoseconds */
42 * Note: Coordinate changes to this structure with the XFS_DI_* #defines
43 * below, the offsets table in xfs_ialloc_log_di() and struct xfs_icdinode
46 typedef struct xfs_dinode_core {
47 __be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */
48 __be16 di_mode; /* mode and type of file */
49 __u8 di_version; /* inode version */
50 __u8 di_format; /* format of di_c data */
51 __be16 di_onlink; /* old number of links to file */
52 __be32 di_uid; /* owner's user id */
53 __be32 di_gid; /* owner's group id */
54 __be32 di_nlink; /* number of links to file */
55 __be16 di_projid; /* owner's project id */
56 __u8 di_pad[8]; /* unused, zeroed space */
57 __be16 di_flushiter; /* incremented on flush */
58 xfs_timestamp_t di_atime; /* time last accessed */
59 xfs_timestamp_t di_mtime; /* time last modified */
60 xfs_timestamp_t di_ctime; /* time created/inode modified */
61 __be64 di_size; /* number of bytes in file */
62 __be64 di_nblocks; /* # of direct & btree blocks used */
63 __be32 di_extsize; /* basic/minimum extent size for file */
64 __be32 di_nextents; /* number of extents in data fork */
65 __be16 di_anextents; /* number of extents in attribute fork*/
66 __u8 di_forkoff; /* attr fork offs, <<3 for 64b align */
67 __s8 di_aformat; /* format of attr fork's data */
68 __be32 di_dmevmask; /* DMIG event mask */
69 __be16 di_dmstate; /* DMIG state info */
70 __be16 di_flags; /* random flags, XFS_DIFLAG_... */
71 __be32 di_gen; /* generation number */
74 #define DI_MAX_FLUSH 0xffff
76 typedef struct xfs_dinode
78 xfs_dinode_core_t di_core;
80 * In adding anything between the core and the union, be
81 * sure to update the macros like XFS_LITINO below.
83 __be32 di_next_unlinked;/* agi unlinked list ptr */
85 xfs_bmdr_block_t di_bmbt; /* btree root block */
86 xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */
87 xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */
88 char di_c[1]; /* local contents */
89 __be32 di_dev; /* device for S_IFCHR/S_IFBLK */
90 uuid_t di_muuid; /* mount point value */
91 char di_symlink[1]; /* local symbolic link */
94 xfs_bmdr_block_t di_abmbt; /* btree root block */
95 xfs_bmbt_rec_32_t di_abmx[1]; /* extent list */
96 xfs_attr_shortform_t di_attrsf; /* shortform attribute list */
101 * The 32 bit link count in the inode theoretically maxes out at UINT_MAX.
102 * Since the pathconf interface is signed, we use 2^31 - 1 instead.
103 * The old inode format had a 16 bit link count, so its maximum is USHRT_MAX.
105 #define XFS_MAXLINK ((1U << 31) - 1U)
106 #define XFS_MAXLINK_1 65535U
109 * Values for di_format
111 typedef enum xfs_dinode_fmt
113 XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */
114 XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */
115 /* LNK: di_symlink */
116 XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */
117 XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */
118 XFS_DINODE_FMT_UUID /* MNT: di_uuid */
122 * Inode minimum and maximum sizes.
124 #define XFS_DINODE_MIN_LOG 8
125 #define XFS_DINODE_MAX_LOG 11
126 #define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG)
127 #define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG)
130 * Inode size for given fs.
132 #define XFS_LITINO(mp) ((mp)->m_litino)
133 #define XFS_BROOT_SIZE_ADJ \
134 (XFS_BTREE_LBLOCK_LEN - sizeof(xfs_bmdr_block_t))
137 * Inode data & attribute fork sizes, per inode.
139 #define XFS_DFORK_Q(dip) ((dip)->di_core.di_forkoff != 0)
140 #define XFS_DFORK_BOFF(dip) ((int)((dip)->di_core.di_forkoff << 3))
142 #define XFS_DFORK_DSIZE(dip,mp) \
143 (XFS_DFORK_Q(dip) ? \
144 XFS_DFORK_BOFF(dip) : \
146 #define XFS_DFORK_ASIZE(dip,mp) \
147 (XFS_DFORK_Q(dip) ? \
148 XFS_LITINO(mp) - XFS_DFORK_BOFF(dip) : \
150 #define XFS_DFORK_SIZE(dip,mp,w) \
151 ((w) == XFS_DATA_FORK ? \
152 XFS_DFORK_DSIZE(dip, mp) : \
153 XFS_DFORK_ASIZE(dip, mp))
155 #define XFS_DFORK_DPTR(dip) ((dip)->di_u.di_c)
156 #define XFS_DFORK_APTR(dip) \
157 ((dip)->di_u.di_c + XFS_DFORK_BOFF(dip))
158 #define XFS_DFORK_PTR(dip,w) \
159 ((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip))
160 #define XFS_DFORK_FORMAT(dip,w) \
161 ((w) == XFS_DATA_FORK ? \
162 (dip)->di_core.di_format : \
163 (dip)->di_core.di_aformat)
164 #define XFS_DFORK_NEXTENTS(dip,w) \
165 ((w) == XFS_DATA_FORK ? \
166 be32_to_cpu((dip)->di_core.di_nextents) : \
167 be16_to_cpu((dip)->di_core.di_anextents))
169 #define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)XFS_BUF_PTR(bp))
172 * Values for di_flags
173 * There should be a one-to-one correspondence between these flags and the
176 #define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */
177 #define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */
178 #define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */
179 #define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */
180 #define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */
181 #define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */
182 #define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */
183 #define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */
184 #define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */
185 #define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */
186 #define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */
187 #define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */
188 #define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */
189 #define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */
190 #define XFS_DIFLAG_FILESTREAM_BIT 14 /* use filestream allocator */
191 #define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT)
192 #define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT)
193 #define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT)
194 #define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT)
195 #define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT)
196 #define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT)
197 #define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT)
198 #define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT)
199 #define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT)
200 #define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT)
201 #define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT)
202 #define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT)
203 #define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
204 #define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT)
205 #define XFS_DIFLAG_FILESTREAM (1 << XFS_DIFLAG_FILESTREAM_BIT)
208 #define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME)
210 #define XFS_IS_REALTIME_INODE(ip) (0)
213 #define XFS_DIFLAG_ANY \
214 (XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
215 XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
216 XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
217 XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
218 XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM)
220 #endif /* __XFS_DINODE_H__ */