summaryrefslogtreecommitdiffstats
path: root/fs/freevxfs/vxfs.h
blob: a41ea0ba694337b69e679f8fba3a20b6803cde80 (plain)
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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
/*
 * Copyright (c) 2000-2001 Christoph Hellwig.
 * Copyright (c) 2016 Krzysztof Blaszkowski
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL").
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
#ifndef _VXFS_SUPER_H_
#define _VXFS_SUPER_H_

/*
 * Veritas filesystem driver - superblock structure.
 *
 * This file contains the definition of the disk and core
 * superblocks of the Veritas Filesystem.
 */
#include <linux/types.h>

/*
 * Superblock magic number (vxfs_super->vs_magic).
 */
#define VXFS_SUPER_MAGIC	0xa501FCF5

/*
 * The root inode.
 */
#define VXFS_ROOT_INO		2

/*
 * Num of entries in free extent array
 */
#define VXFS_NEFREE		32

enum vxfs_byte_order {
	VXFS_BO_LE,
	VXFS_BO_BE,
};

typedef __u16 __bitwise __fs16;
typedef __u32 __bitwise __fs32;
typedef __u64 __bitwise __fs64;

/*
 * VxFS superblock (disk).
 */
struct vxfs_sb {
	/*
	 * Readonly fields for the version 1 superblock.
	 *
	 * Lots of this fields are no more used by version 2
	 * and never filesystems.
	 */
	__fs32		vs_magic;		/* Magic number */
	__fs32		vs_version;		/* VxFS version */
	__fs32		vs_ctime;		/* create time - secs */
	__fs32		vs_cutime;		/* create time - usecs */
	__fs32		__unused1;		/* unused */
	__fs32		__unused2;		/* unused */
	__fs32		vs_old_logstart;	/* obsolete */
	__fs32		vs_old_logend;		/* obsolete */
	__fs32		vs_bsize;		/* block size */
	__fs32		vs_size;		/* number of blocks */
	__fs32		vs_dsize;		/* number of data blocks */
	__fs32		vs_old_ninode;		/* obsolete */
	__fs32		vs_old_nau;		/* obsolete */
	__fs32		__unused3;		/* unused */
	__fs32		vs_old_defiextsize;	/* obsolete */
	__fs32		vs_old_ilbsize;		/* obsolete */
	__fs32		vs_immedlen;		/* size of immediate data area */
	__fs32		vs_ndaddr;		/* number of direct extentes */
	__fs32		vs_firstau;		/* address of first AU */
	__fs32		vs_emap;		/* offset of extent map in AU */
	__fs32		vs_imap;		/* offset of inode map in AU */
	__fs32		vs_iextop;		/* offset of ExtOp. map in AU */
	__fs32		vs_istart;		/* offset of inode list in AU */
	__fs32		vs_bstart;		/* offset of fdblock in AU */
	__fs32		vs_femap;		/* aufirst + emap */
	__fs32		vs_fimap;		/* aufirst + imap */
	__fs32		vs_fiextop;		/* aufirst + iextop */
	__fs32		vs_fistart;		/* aufirst + istart */
	__fs32		vs_fbstart;		/* aufirst + bstart */
	__fs32		vs_nindir;		/* number of entries in indir */
	__fs32		vs_aulen;		/* length of AU in blocks */
	__fs32		vs_auimlen;		/* length of imap in blocks */
	__fs32		vs_auemlen;		/* length of emap in blocks */
	__fs32		vs_auilen;		/* length of ilist in blocks */
	__fs32		vs_aupad;		/* length of pad in blocks */
	__fs32		vs_aublocks;		/* data blocks in AU */
	__fs32		vs_maxtier;		/* log base 2 of aublocks */
	__fs32		vs_inopb;		/* number of inodes per blk */
	__fs32		vs_old_inopau;		/* obsolete */
	__fs32		vs_old_inopilb;		/* obsolete */
	__fs32		vs_old_ndiripau;	/* obsolete */
	__fs32		vs_iaddrlen;		/* size of indirect addr ext. */
	__fs32		vs_bshift;		/* log base 2 of bsize */
	__fs32		vs_inoshift;		/* log base 2 of inobp */
	__fs32		vs_bmask;		/* ~( bsize - 1 ) */
	__fs32		vs_boffmask;		/* bsize - 1 */
	__fs32		vs_old_inomask;		/* old_inopilb - 1 */
	__fs32		vs_checksum;		/* checksum of V1 data */
	
	/*
	 * Version 1, writable
	 */
	__fs32		vs_free;		/* number of free blocks */
	__fs32		vs_ifree;		/* number of free inodes */
	__fs32		vs_efree[VXFS_NEFREE];	/* number of free extents by size */
	__fs32		vs_flags;		/* flags ?!? */
	__u8		vs_mod;			/* filesystem has been changed */
	__u8		vs_clean;		/* clean FS */
	__fs16		__unused4;		/* unused */
	__fs32		vs_firstlogid;		/* mount time log ID */
	__fs32		vs_wtime;		/* last time written - sec */
	__fs32		vs_wutime;		/* last time written - usec */
	__u8		vs_fname[6];		/* FS name */
	__u8		vs_fpack[6];		/* FS pack name */
	__fs32		vs_logversion;		/* log format version */
	__u32		__unused5;		/* unused */
	
	/*
	 * Version 2, Read-only
	 */
	__fs32		vs_oltext[2];		/* OLT extent and replica */
	__fs32		vs_oltsize;		/* OLT extent size */
	__fs32		vs_iauimlen;		/* size of inode map */
	__fs32		vs_iausize;		/* size of IAU in blocks */
	__fs32		vs_dinosize;		/* size of inode in bytes */
	__fs32		vs_old_dniaddr;		/* indir levels per inode */
	__fs32		vs_checksum2;		/* checksum of V2 RO */

	/*
	 * Actually much more...
	 */
};


/*
 * In core superblock filesystem private data for VxFS.
 */
struct vxfs_sb_info {
	struct vxfs_sb		*vsi_raw;	/* raw (on disk) superblock */
	struct buffer_head	*vsi_bp;	/* buffer for raw superblock*/
	struct inode		*vsi_fship;	/* fileset header inode */
	struct inode		*vsi_ilist;	/* inode list inode */
	struct inode		*vsi_stilist;	/* structural inode list inode */
	u_long			vsi_iext;	/* initial inode list */
	ino_t			vsi_fshino;	/* fileset header inode */
	daddr_t			vsi_oltext;	/* OLT extent */
	daddr_t			vsi_oltsize;	/* OLT size */
	enum vxfs_byte_order	byte_order;
};

static inline u16 fs16_to_cpu(struct vxfs_sb_info *sbi, __fs16 a)
{
	if (sbi->byte_order == VXFS_BO_BE)
		return be16_to_cpu((__force __be16)a);
	else
		return le16_to_cpu((__force __le16)a);
}

static inline u32 fs32_to_cpu(struct vxfs_sb_info *sbi, __fs32 a)
{
	if (sbi->byte_order == VXFS_BO_BE)
		return be32_to_cpu((__force __be32)a);
	else
		return le32_to_cpu((__force __le32)a);
}

static inline u64 fs64_to_cpu(struct vxfs_sb_info *sbi, __fs64 a)
{
	if (sbi->byte_order == VXFS_BO_BE)
		return be64_to_cpu((__force __be64)a);
	else
		return le64_to_cpu((__force __le64)a);
}

/*
 * File modes.  File types above 0xf000 are vxfs internal only, they should
 * not be passed back to higher levels of the system.  vxfs file types must
 * never have one of the regular file type bits set.
 */
enum vxfs_mode {
	VXFS_ISUID = 0x00000800,	/* setuid */
	VXFS_ISGID = 0x00000400,	/* setgid */
	VXFS_ISVTX = 0x00000200,	/* sticky bit */
	VXFS_IREAD = 0x00000100,	/* read */
	VXFS_IWRITE = 0x00000080,	/* write */
	VXFS_IEXEC = 0x00000040,	/* exec */

	VXFS_IFIFO = 0x00001000,	/* Named pipe */
	VXFS_IFCHR = 0x00002000,	/* Character device */
	VXFS_IFDIR = 0x00004000,	/* Directory */
	VXFS_IFNAM = 0x00005000,	/* Xenix device ?? */
	VXFS_IFBLK = 0x00006000,	/* Block device */
	VXFS_IFREG = 0x00008000,	/* Regular file */
	VXFS_IFCMP = 0x00009000,	/* Compressed file ?!? */
	VXFS_IFLNK = 0x0000a000,	/* Symlink */
	VXFS_IFSOC = 0x0000c000,	/* Socket */

	/* VxFS internal */
	VXFS_IFFSH = 0x10000000,	/* Fileset header */
	VXFS_IFILT = 0x20000000,	/* Inode list */
	VXFS_IFIAU = 0x30000000,	/* Inode allocation unit */
	VXFS_IFCUT = 0x40000000,	/* Current usage table */
	VXFS_IFATT = 0x50000000,	/* Attr. inode */
	VXFS_IFLCT = 0x60000000,	/* Link count table */
	VXFS_IFIAT = 0x70000000,	/* Indirect attribute file */
	VXFS_IFEMR = 0x80000000,	/* Extent map reorg file */
	VXFS_IFQUO = 0x90000000,	/* BSD quota file */
	VXFS_IFPTI = 0xa0000000,	/* "Pass through" inode */
	VXFS_IFLAB = 0x11000000,	/* Device label file */
	VXFS_IFOLT = 0x12000000,	/* OLT file */
	VXFS_IFLOG = 0x13000000,	/* Log file */
	VXFS_IFEMP = 0x14000000,	/* Extent map file */
	VXFS_IFEAU = 0x15000000,	/* Extent AU file */
	VXFS_IFAUS = 0x16000000,	/* Extent AU summary file */
	VXFS_IFDEV = 0x17000000,	/* Device config file */

};

#define	VXFS_TYPE_MASK		0xfffff000

#define VXFS_IS_TYPE(ip,type)	(((ip)->vii_mode & VXFS_TYPE_MASK) == (type))
#define VXFS_ISFIFO(x)		VXFS_IS_TYPE((x),VXFS_IFIFO)
#define VXFS_ISCHR(x)		VXFS_IS_TYPE((x),VXFS_IFCHR)
#define VXFS_ISDIR(x)		VXFS_IS_TYPE((x),VXFS_IFDIR)
#define VXFS_ISNAM(x)		VXFS_IS_TYPE((x),VXFS_IFNAM)
#define VXFS_ISBLK(x)		VXFS_IS_TYPE((x),VXFS_IFBLK)
#define VXFS_ISLNK(x)		VXFS_IS_TYPE((x),VXFS_IFLNK)
#define VXFS_ISREG(x)		VXFS_IS_TYPE((x),VXFS_IFREG)
#define VXFS_ISCMP(x)		VXFS_IS_TYPE((x),VXFS_IFCMP)
#define VXFS_ISSOC(x)		VXFS_IS_TYPE((x),VXFS_IFSOC)

#define VXFS_ISFSH(x)		VXFS_IS_TYPE((x),VXFS_IFFSH)
#define VXFS_ISILT(x)		VXFS_IS_TYPE((x),VXFS_IFILT)

/*
 * Inmode organisation types.
 */
enum {
	VXFS_ORG_NONE	= 0,	/* Inode has *no* format ?!? */
	VXFS_ORG_EXT4	= 1,	/* Ext4 */
	VXFS_ORG_IMMED	= 2,	/* All data stored in inode */
	VXFS_ORG_TYPED	= 3,	/* Typed extents */
};

#define VXFS_IS_ORG(ip,org)	((ip)->vii_orgtype == (org))
#define VXFS_ISNONE(ip)		VXFS_IS_ORG((ip), VXFS_ORG_NONE)
#define VXFS_ISEXT4(ip)		VXFS_IS_ORG((ip), VXFS_ORG_EXT4)
#define VXFS_ISIMMED(ip)	VXFS_IS_ORG((ip), VXFS_ORG_IMMED)
#define VXFS_ISTYPED(ip)	VXFS_IS_ORG((ip), VXFS_ORG_TYPED)

/*
 * Get filesystem private data from VFS superblock.
 */
#define VXFS_SBI(sbp) \
	((struct vxfs_sb_info *)(sbp)->s_fs_info)

#endif /* _VXFS_SUPER_H_ */