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
|
/* $NetBSD: efs_dinode.h,v 1.3 2016/07/07 06:55:42 msaitoh Exp $ */
/*
* Copyright (c) 2006 Stephen M. Rumble <rumble@ephemeral.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* EFS on-disk inode format.
*
* See IRIX inode(4)
*/
#ifndef _FS_EFS_EFS_DINODE_H_
#define _FS_EFS_EFS_DINODE_H_
/*
* Historical locations are always good.
*/
#define EFS_ROOTINO ((ino_t)2)
/*
* EFS on-disk inode structure (128 bytes)
*
* [0] - NetBSD native uid_t is uint32_t.
* [1] - NetBSD native gid_t is uint32_t.
* [2] - NetBSD native off_t is int64_t.
* [3] - See notes for di_u below for meanings of di_numextents.
* [4] - Always 0 with EFS. Apparently it could take on other values when
* used in conjunction with AFS.
*/
#define EFS_DIRECTEXTENTS 12
struct efs_dinode {
uint16_t di_mode; /* 0: file type and permissions */
int16_t di_nlink; /* 2: link count (minimum 2) */
uint16_t di_uid; /* 4: user ID [0] */
uint16_t di_gid; /* 6: group ID [1] */
int32_t di_size; /* 8: file size (in bytes) [2] */
uint32_t di_atime; /* 12: file access time */
uint32_t di_mtime; /* 16: file modification time */
uint32_t di_ctime; /* 20: inode modification time */
int32_t di_gen; /* 24: inode generation number */
int16_t di_numextents; /* 28: number of extents in file [3] */
uint8_t di_version; /* 30: inode version [4] */
uint8_t di_spare; /* 31: unused */
union {
/*
* If di_numextents <= EFS_DIRECTEXTENTS, _di_extents contains
* direct extent descriptors.
*
* else (di_numextents > EFS_DIRECTEXTENTS), _di_extents
* contains indirect extent descriptors.
*
* If indirect extents are being used, extents[0].ex_offset
* contains the number of indirect extents, i.e. the valid
* offsets in 'extents' are:
* extents[0 ... (extents[0].ex_offset - 1)]
* It's not presently known if the ex_offset fields in
* extents[1 ... EFS_DIRECTEXTENTS] have any meaning.
*/
struct efs_dextent extents[EFS_DIRECTEXTENTS];
/*
* If di_numextents == 0 and di_mode indicates a symlink, the
* symlink path is inlined into _di_symlink. Otherwise, the
* symlink exists in extents.
*
* Note that the symlink is stored without nul-termination,
* and di_size reflects this length.
*/
char symlink[sizeof(struct efs_dextent) * EFS_DIRECTEXTENTS];
/*
* If di_numextents == 0 and di_mode indicates a character or
* block special file, the device tag is contained in _di_dev.
*
* Note that IRIX moved from 16bit to 32bit dev_t's at some
* point and a new field was added. It appears that when 32bit
* dev_t's are used, di_odev is set to 0xffff.
*/
struct {
uint16_t dev_old;
uint32_t dev_new;
} __packed dev;
} di_u;
} __packed;
#define di_extents di_u.extents
#define di_symlink di_u.symlink
#define di_odev di_u.dev.dev_old
#define di_ndev di_u.dev.dev_new
#define EFS_DINODE_SIZE sizeof(struct efs_dinode)
#define EFS_DINODES_PER_BB (EFS_BB_SIZE / EFS_DINODE_SIZE)
#define EFS_DINODE_ODEV_INVALID (0xffff)
#define EFS_DINODE_ODEV_MAJ(_x) (((_x) >> 8) & 0x7f)
#define EFS_DINODE_ODEV_MIN(_x) (((_x) >> 0) & 0xff)
#define EFS_DINODE_NDEV_MAJ(_x) (((_x) >> 18) & 0x1ff)
#define EFS_DINODE_NDEV_MIN(_x) (((_x) >> 0) & 0x3ffff)
/* EFS file permissions. */
#define EFS_IEXEC 0000100 /* executable */
#define EFS_IWRITE 0000200 /* writable */
#define EFS_IREAD 0000400 /* readable */
#define EFS_ISVTX 0001000 /* sticky bit */
#define EFS_ISGID 0002000 /* setgid */
#define EFS_ISUID 0004000 /* setuid */
/* EFS file types. */
#define EFS_IFMT 0170000 /* file type mask */
#define EFS_IFIFO 0010000 /* named pipe */
#define EFS_IFCHR 0020000 /* character device */
#define EFS_IFDIR 0040000 /* directory */
#define EFS_IFBLK 0060000 /* block device */
#define EFS_IFREG 0100000 /* regular file */
#define EFS_IFLNK 0120000 /* symlink */
#define EFS_IFSOCK 0140000 /* UNIX domain socket */
#endif /* !_FS_EFS_EFS_DINODE_H_ */
|