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
|
/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 _SYS_MOUNT_H_
#define _SYS_MOUNT_H_
#include <sys/queue.h>
#include <sys/types.h>
#include <os/vnode.h>
#if defined(_KERNEL)
/*
* Number of bytes allowed in a filesystem
* name including the null termination
*/
#define FSNAME_MAX 16
/*
* Mount filesystem string names
*/
#define MOUNT_INITRD "initrd" /* Initial ramdisk */
/* Forward declarations */
struct vfsops;
struct mount;
/* Filesystem vfsops */
extern struct vfsops g_omar_vfsops;
/*
* Represents a mountpoint
*/
struct mount {
struct vnode *vp;
const char *name;
TAILQ_ENTRY(mount) link;
TAILQ_HEAD(, mount) buckets;
};
/*
* Represents a list of mountpoints
*
* @i: Initialized (set if initialized)
*/
struct mountlist {
uint8_t i : 1;
TAILQ_HEAD(, mount) list;
};
/*
* Arguments for mount()
*
* @source: Specifies the source filesystem to mount
* @target: Specifies the location to mount source
* @fstype: File system type
* @data: Filesystem specific data
*/
struct mount_args {
const char *source;
const char *target;
const char *fstype;
const void *data;
};
/*
* Represents information about a filesystem
*
* @name: Filesystem type name
* @vfsops: VFS operations vector
* @refcount: Mount count of this type
*/
struct fs_info {
char name[FSNAME_MAX];
const struct vfsops *vfsops;
int refcount;
};
/*
* VFS operations vector
*
* @init: Initialize the filesystem
* @mount: Mount a filesystem
*/
struct vfsops {
int(*init)(struct fs_info *fip);
int(*mount)(struct fs_info *fip, struct mount_args *margs);
};
/*
* Mount a specific filesystem
*
* @margs: Mount arguments
* @flags: Mount flags
*
* Returns zero on success, otherwise a less than zero
* failure upon failure.
*/
int mount(struct mount_args *margs, uint32_t flags);
/*
* Initialize a mountpoint to a known state
*
* @mp: Pointer to mountlist [if NULL, use root]
*
* Returns zero on success, otherwise a less than
* zero value on failure.
*/
int mountlist_init(struct mountlist *mlp);
#endif /* !_KERNEL */
#endif /* !_SYS_MOUNT_H_ */
|
