1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __XFS_DINODE_H__
#define __XFS_DINODE_H__
struct xfs_buf;
struct xfs_mount;
#define XFS_DINODE_VERSION_1 1
#define XFS_DINODE_VERSION_2 2
#define XFS_DINODE_GOOD_VERSION(v) \
(((v) == XFS_DINODE_VERSION_1 || (v) == XFS_DINODE_VERSION_2))
#define XFS_DINODE_MAGIC 0x494e /* 'IN' */
/*
* Disk inode structure.
* This is just the header; the inode is expanded to fill a variable size
* with the last field expanding. It is split into the core and "other"
* because we only need the core part in the in-core inode.
*/
typedef struct xfs_timestamp {
__be32 t_sec; /* timestamp seconds */
__be32 t_nsec; /* timestamp nanoseconds */
} xfs_timestamp_t;
/*
* Note: Coordinate changes to this structure with the XFS_DI_* #defines
* below, the offsets table in xfs_ialloc_log_di() and struct xfs_icdinode
* in xfs_inode.h.
*/
typedef struct xfs_dinode_core {
__be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */
__be16 di_mode; /* mode and type of file */
__u8 di_version; /* inode version */
__u8 di_format; /* format of di_c data */
__be16 di_onlink; /* old number of links to file */
__be32 di_uid; /* owner's user id */
__be32 di_gid; /* owner's group id */
__be32 di_nlink; /* number of links to file */
__be16 di_projid; /* owner's project id */
__u8 di_pad[8]; /* unused, zeroed space */
__be16 di_flushiter; /* incremented on flush */
xfs_timestamp_t di_atime; /* time last accessed */
xfs_timestamp_t di_mtime; /* time last modified */
xfs_timestamp_t di_ctime; /* time created/inode modified */
__be64 di_size; /* number of bytes in file */
__be64 di_nblocks; /* # of direct & btree blocks used */
__be32 di_extsize; /* basic/minimum extent size for file */
__be32 di_nextents; /* number of extents in data fork */
__be16 di_anextents; /* number of extents in attribute fork*/
__u8 di_forkoff; /* attr fork offs, <<3 for 64b align */
__s8 di_aformat; /* format of attr fork's data */
__be32 di_dmevmask; /* DMIG event mask */
__be16 di_dmstate; /* DMIG state info */
__be16 di_flags; /* random flags, XFS_DIFLAG_... */
__be32 di_gen; /* generation number */
} xfs_dinode_core_t;
#define DI_MAX_FLUSH 0xffff
typedef struct xfs_dinode
{
xfs_dinode_core_t di_core;
/*
* In adding anything between the core and the union, be
* sure to update the macros like XFS_LITINO below.
*/
__be32 di_next_unlinked;/* agi unlinked list ptr */
union {
xfs_bmdr_block_t di_bmbt; /* btree root block */
xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */
xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */
char di_c[1]; /* local contents */
__be32 di_dev; /* device for S_IFCHR/S_IFBLK */
uuid_t di_muuid; /* mount point value */
char di_symlink[1]; /* local symbolic link */
} di_u;
union {
xfs_bmdr_block_t di_abmbt; /* btree root block */
xfs_bmbt_rec_32_t di_abmx[1]; /* extent list */
xfs_attr_shortform_t di_attrsf; /* shortform attribute list */
} di_a;
} xfs_dinode_t;
/*
* The 32 bit link count in the inode theoretically maxes out at UINT_MAX.
* Since the pathconf interface is signed, we use 2^31 - 1 instead.
* The old inode format had a 16 bit link count, so its maximum is USHRT_MAX.
*/
#define XFS_MAXLINK ((1U << 31) - 1U)
#define XFS_MAXLINK_1 65535U
/*
* Values for di_format
*/
typedef enum xfs_dinode_fmt
{
XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */
XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */
/* LNK: di_symlink */
XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */
XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */
XFS_DINODE_FMT_UUID /* MNT: di_uuid */
} xfs_dinode_fmt_t;
/*
* Inode minimum and maximum sizes.
*/
#define XFS_DINODE_MIN_LOG 8
#define XFS_DINODE_MAX_LOG 11
#define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG)
#define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG)
/*
* Inode size for given fs.
*/
#define XFS_LITINO(mp) ((mp)->m_litino)
#define XFS_BROOT_SIZE_ADJ \
(XFS_BTREE_LBLOCK_LEN - sizeof(xfs_bmdr_block_t))
/*
* Inode data & attribute fork sizes, per inode.
*/
#define XFS_DFORK_Q(dip) ((dip)->di_core.di_forkoff != 0)
#define XFS_DFORK_BOFF(dip) ((int)((dip)->di_core.di_forkoff << 3))
#define XFS_DFORK_DSIZE(dip,mp) \
(XFS_DFORK_Q(dip) ? \
XFS_DFORK_BOFF(dip) : \
XFS_LITINO(mp))
#define XFS_DFORK_ASIZE(dip,mp) \
(XFS_DFORK_Q(dip) ? \
XFS_LITINO(mp) - XFS_DFORK_BOFF(dip) : \
0)
#define XFS_DFORK_SIZE(dip,mp,w) \
((w) == XFS_DATA_FORK ? \
XFS_DFORK_DSIZE(dip, mp) : \
XFS_DFORK_ASIZE(dip, mp))
#define XFS_DFORK_DPTR(dip) ((dip)->di_u.di_c)
#define XFS_DFORK_APTR(dip) \
((dip)->di_u.di_c + XFS_DFORK_BOFF(dip))
#define XFS_DFORK_PTR(dip,w) \
((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip))
#define XFS_DFORK_FORMAT(dip,w) \
((w) == XFS_DATA_FORK ? \
(dip)->di_core.di_format : \
(dip)->di_core.di_aformat)
#define XFS_DFORK_NEXTENTS(dip,w) \
((w) == XFS_DATA_FORK ? \
be32_to_cpu((dip)->di_core.di_nextents) : \
be16_to_cpu((dip)->di_core.di_anextents))
#define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)XFS_BUF_PTR(bp))
/*
* Values for di_flags
* There should be a one-to-one correspondence between these flags and the
* XFS_XFLAG_s.
*/
#define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */
#define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */
#define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */
#define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */
#define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */
#define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */
#define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */
#define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */
#define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */
#define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */
#define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */
#define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */
#define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */
#define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */
#define XFS_DIFLAG_FILESTREAM_BIT 14 /* use filestream allocator */
#define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT)
#define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT)
#define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT)
#define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT)
#define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT)
#define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT)
#define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT)
#define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT)
#define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT)
#define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT)
#define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT)
#define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT)
#define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
#define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT)
#define XFS_DIFLAG_FILESTREAM (1 << XFS_DIFLAG_FILESTREAM_BIT)
#ifdef CONFIG_XFS_RT
#define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME)
#else
#define XFS_IS_REALTIME_INODE(ip) (0)
#endif
#define XFS_DIFLAG_ANY \
(XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM)
#endif /* __XFS_DINODE_H__ */
|
