tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#ifndef __XFS_DINODE_H__
19#define __XFS_DINODE_H__
20
21struct xfs_buf;
22struct xfs_mount;
23
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' */
29
30/*
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.
35 */
36typedef struct xfs_timestamp {
37 __be32 t_sec; /* timestamp seconds */
38 __be32 t_nsec; /* timestamp nanoseconds */
39} xfs_timestamp_t;
40
41/*
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
44 * in xfs_inode.h.
45 */
46typedef 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 */
72} xfs_dinode_core_t;
73
74#define DI_MAX_FLUSH 0xffff
75
76typedef struct xfs_dinode
77{
78 xfs_dinode_core_t di_core;
79 /*
80 * In adding anything between the core and the union, be
81 * sure to update the macros like XFS_LITINO below and
82 * XFS_BMAP_RBLOCK_DSIZE in xfs_bmap_btree.h.
83 */
84 __be32 di_next_unlinked;/* agi unlinked list ptr */
85 union {
86 xfs_bmdr_block_t di_bmbt; /* btree root block */
87 xfs_bmbt_rec_32_t di_bmx[1]; /* extent list */
88 xfs_dir2_sf_t di_dir2sf; /* shortform directory v2 */
89 char di_c[1]; /* local contents */
90 __be32 di_dev; /* device for S_IFCHR/S_IFBLK */
91 uuid_t di_muuid; /* mount point value */
92 char di_symlink[1]; /* local symbolic link */
93 } di_u;
94 union {
95 xfs_bmdr_block_t di_abmbt; /* btree root block */
96 xfs_bmbt_rec_32_t di_abmx[1]; /* extent list */
97 xfs_attr_shortform_t di_attrsf; /* shortform attribute list */
98 } di_a;
99} xfs_dinode_t;
100
101/*
102 * The 32 bit link count in the inode theoretically maxes out at UINT_MAX.
103 * Since the pathconf interface is signed, we use 2^31 - 1 instead.
104 * The old inode format had a 16 bit link count, so its maximum is USHRT_MAX.
105 */
106#define XFS_MAXLINK ((1U << 31) - 1U)
107#define XFS_MAXLINK_1 65535U
108
109/*
110 * Bit names for logging disk inodes only
111 */
112#define XFS_DI_MAGIC 0x0000001
113#define XFS_DI_MODE 0x0000002
114#define XFS_DI_VERSION 0x0000004
115#define XFS_DI_FORMAT 0x0000008
116#define XFS_DI_ONLINK 0x0000010
117#define XFS_DI_UID 0x0000020
118#define XFS_DI_GID 0x0000040
119#define XFS_DI_NLINK 0x0000080
120#define XFS_DI_PROJID 0x0000100
121#define XFS_DI_PAD 0x0000200
122#define XFS_DI_ATIME 0x0000400
123#define XFS_DI_MTIME 0x0000800
124#define XFS_DI_CTIME 0x0001000
125#define XFS_DI_SIZE 0x0002000
126#define XFS_DI_NBLOCKS 0x0004000
127#define XFS_DI_EXTSIZE 0x0008000
128#define XFS_DI_NEXTENTS 0x0010000
129#define XFS_DI_NAEXTENTS 0x0020000
130#define XFS_DI_FORKOFF 0x0040000
131#define XFS_DI_AFORMAT 0x0080000
132#define XFS_DI_DMEVMASK 0x0100000
133#define XFS_DI_DMSTATE 0x0200000
134#define XFS_DI_FLAGS 0x0400000
135#define XFS_DI_GEN 0x0800000
136#define XFS_DI_NEXT_UNLINKED 0x1000000
137#define XFS_DI_U 0x2000000
138#define XFS_DI_A 0x4000000
139#define XFS_DI_NUM_BITS 27
140#define XFS_DI_ALL_BITS ((1 << XFS_DI_NUM_BITS) - 1)
141#define XFS_DI_CORE_BITS (XFS_DI_ALL_BITS & ~(XFS_DI_U|XFS_DI_A))
142
143/*
144 * Values for di_format
145 */
146typedef enum xfs_dinode_fmt
147{
148 XFS_DINODE_FMT_DEV, /* CHR, BLK: di_dev */
149 XFS_DINODE_FMT_LOCAL, /* DIR, REG: di_c */
150 /* LNK: di_symlink */
151 XFS_DINODE_FMT_EXTENTS, /* DIR, REG, LNK: di_bmx */
152 XFS_DINODE_FMT_BTREE, /* DIR, REG, LNK: di_bmbt */
153 XFS_DINODE_FMT_UUID /* MNT: di_uuid */
154} xfs_dinode_fmt_t;
155
156/*
157 * Inode minimum and maximum sizes.
158 */
159#define XFS_DINODE_MIN_LOG 8
160#define XFS_DINODE_MAX_LOG 11
161#define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG)
162#define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG)
163
164/*
165 * Inode size for given fs.
166 */
167#define XFS_LITINO(mp) ((mp)->m_litino)
168#define XFS_BROOT_SIZE_ADJ \
169 (sizeof(xfs_bmbt_block_t) - sizeof(xfs_bmdr_block_t))
170
171/*
172 * Inode data & attribute fork sizes, per inode.
173 */
174#define XFS_CFORK_Q(dcp) ((dcp)->di_forkoff != 0)
175#define XFS_CFORK_Q_DISK(dcp) ((dcp)->di_forkoff != 0)
176
177#define XFS_CFORK_BOFF(dcp) ((int)((dcp)->di_forkoff << 3))
178#define XFS_CFORK_BOFF_DISK(dcp) ((int)((dcp)->di_forkoff << 3))
179
180#define XFS_CFORK_DSIZE_DISK(dcp,mp) \
181 (XFS_CFORK_Q_DISK(dcp) ? XFS_CFORK_BOFF_DISK(dcp) : XFS_LITINO(mp))
182#define XFS_CFORK_DSIZE(dcp,mp) \
183 (XFS_CFORK_Q(dcp) ? XFS_CFORK_BOFF(dcp) : XFS_LITINO(mp))
184
185#define XFS_CFORK_ASIZE_DISK(dcp,mp) \
186 (XFS_CFORK_Q_DISK(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF_DISK(dcp) : 0)
187#define XFS_CFORK_ASIZE(dcp,mp) \
188 (XFS_CFORK_Q(dcp) ? XFS_LITINO(mp) - XFS_CFORK_BOFF(dcp) : 0)
189
190#define XFS_CFORK_SIZE_DISK(dcp,mp,w) \
191 ((w) == XFS_DATA_FORK ? \
192 XFS_CFORK_DSIZE_DISK(dcp, mp) : \
193 XFS_CFORK_ASIZE_DISK(dcp, mp))
194#define XFS_CFORK_SIZE(dcp,mp,w) \
195 ((w) == XFS_DATA_FORK ? \
196 XFS_CFORK_DSIZE(dcp, mp) : XFS_CFORK_ASIZE(dcp, mp))
197
198#define XFS_DFORK_DSIZE(dip,mp) \
199 XFS_CFORK_DSIZE_DISK(&(dip)->di_core, mp)
200#define XFS_DFORK_DSIZE_HOST(dip,mp) \
201 XFS_CFORK_DSIZE(&(dip)->di_core, mp)
202#define XFS_DFORK_ASIZE(dip,mp) \
203 XFS_CFORK_ASIZE_DISK(&(dip)->di_core, mp)
204#define XFS_DFORK_ASIZE_HOST(dip,mp) \
205 XFS_CFORK_ASIZE(&(dip)->di_core, mp)
206#define XFS_DFORK_SIZE(dip,mp,w) \
207 XFS_CFORK_SIZE_DISK(&(dip)->di_core, mp, w)
208#define XFS_DFORK_SIZE_HOST(dip,mp,w) \
209 XFS_CFORK_SIZE(&(dip)->di_core, mp, w)
210
211#define XFS_DFORK_Q(dip) XFS_CFORK_Q_DISK(&(dip)->di_core)
212#define XFS_DFORK_BOFF(dip) XFS_CFORK_BOFF_DISK(&(dip)->di_core)
213#define XFS_DFORK_DPTR(dip) ((dip)->di_u.di_c)
214#define XFS_DFORK_APTR(dip) \
215 ((dip)->di_u.di_c + XFS_DFORK_BOFF(dip))
216#define XFS_DFORK_PTR(dip,w) \
217 ((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip))
218#define XFS_CFORK_FORMAT(dcp,w) \
219 ((w) == XFS_DATA_FORK ? (dcp)->di_format : (dcp)->di_aformat)
220#define XFS_CFORK_FMT_SET(dcp,w,n) \
221 ((w) == XFS_DATA_FORK ? \
222 ((dcp)->di_format = (n)) : ((dcp)->di_aformat = (n)))
223#define XFS_DFORK_FORMAT(dip,w) XFS_CFORK_FORMAT(&(dip)->di_core, w)
224
225#define XFS_CFORK_NEXTENTS_DISK(dcp,w) \
226 ((w) == XFS_DATA_FORK ? \
227 be32_to_cpu((dcp)->di_nextents) : \
228 be16_to_cpu((dcp)->di_anextents))
229#define XFS_CFORK_NEXTENTS(dcp,w) \
230 ((w) == XFS_DATA_FORK ? (dcp)->di_nextents : (dcp)->di_anextents)
231#define XFS_DFORK_NEXTENTS(dip,w) XFS_CFORK_NEXTENTS_DISK(&(dip)->di_core, w)
232#define XFS_DFORK_NEXTENTS_HOST(dip,w) XFS_CFORK_NEXTENTS(&(dip)->di_core, w)
233
234#define XFS_CFORK_NEXT_SET(dcp,w,n) \
235 ((w) == XFS_DATA_FORK ? \
236 ((dcp)->di_nextents = (n)) : ((dcp)->di_anextents = (n)))
237
238#define XFS_BUF_TO_DINODE(bp) ((xfs_dinode_t *)XFS_BUF_PTR(bp))
239
240/*
241 * Values for di_flags
242 * There should be a one-to-one correspondence between these flags and the
243 * XFS_XFLAG_s.
244 */
245#define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */
246#define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */
247#define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */
248#define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */
249#define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */
250#define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */
251#define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */
252#define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */
253#define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */
254#define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */
255#define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */
256#define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */
257#define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */
258#define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */
259#define XFS_DIFLAG_FILESTREAM_BIT 14 /* use filestream allocator */
260#define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT)
261#define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT)
262#define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT)
263#define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT)
264#define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT)
265#define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT)
266#define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT)
267#define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT)
268#define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT)
269#define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT)
270#define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT)
271#define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT)
272#define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT)
273#define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT)
274#define XFS_DIFLAG_FILESTREAM (1 << XFS_DIFLAG_FILESTREAM_BIT)
275
276#define XFS_DIFLAG_ANY \
277 (XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \
278 XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \
279 XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \
280 XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \
281 XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM)
282
283#endif /* __XFS_DINODE_H__ */