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
|
/*-
* Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <fs/pseudofs/pseudofs.h>
#include <fs/pseudofs/pseudofs_internal.h>
SYSCTL_NODE(_vfs, OID_AUTO, pfs, CTLFLAG_RW, 0,
"pseudofs");
/*
* Mount a pseudofs instance
*/
int
pfs_mount(struct pfs_info *pi, struct mount *mp, char *path, caddr_t data,
struct nameidata *ndp, struct proc *p)
{
struct statfs *sbp;
if (mp->mnt_flag & MNT_UPDATE)
return (EOPNOTSUPP);
mp->mnt_flag |= MNT_LOCAL;
mp->mnt_data = (qaddr_t)pi;
vfs_getnewfsid(mp);
sbp = &mp->mnt_stat;
bcopy(pi->pi_name, sbp->f_mntfromname, sizeof pi->pi_name);
sbp->f_bsize = PAGE_SIZE;
sbp->f_iosize = PAGE_SIZE;
sbp->f_blocks = 1;
sbp->f_bfree = 0;
sbp->f_bavail = 0;
sbp->f_files = 1;
sbp->f_ffree = 0;
return (0);
}
/*
* Unmount a pseudofs instance
*/
int
pfs_unmount(struct mount *mp, int mntflags, struct proc *p)
{
struct pfs_info *pi;
int error;
pi = (struct pfs_info *)mp->mnt_data;
/* XXX do stuff with pi... */
error = vflush(mp, 0, (mntflags & MNT_FORCE) ? FORCECLOSE : 0);
return (error);
}
/*
* Return a root vnode
*/
int
pfs_root(struct mount *mp, struct vnode **vpp)
{
struct pfs_info *pi;
pi = (struct pfs_info *)mp->mnt_data;
return pfs_vncache_alloc(mp, vpp, pi->pi_root, NO_PID);
}
/*
* Return filesystem stats
*/
int
pfs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p)
{
bcopy(&mp->mnt_stat, sbp, sizeof *sbp);
return (0);
}
/*
* Initialize a pseudofs instance
*/
int
pfs_init(struct pfs_info *pi, struct vfsconf *vfc)
{
mtx_init(&pi->pi_mutex, "pseudofs", MTX_DEF);
pfs_fileno_init(pi);
printf("%s registered\n", pi->pi_name);
return (0);
}
/*
* Destroy a pseudofs instance
*/
int
pfs_uninit(struct pfs_info *pi, struct vfsconf *vfc)
{
pfs_fileno_uninit(pi);
mtx_destroy(&pi->pi_mutex);
printf("%s unregistered\n", pi->pi_name);
return (0);
}
/*
* Handle load / unload events
*/
static int
pfs_modevent(module_t mod, int evt, void *arg)
{
switch (evt) {
case MOD_LOAD:
pfs_fileno_load();
pfs_vncache_load();
break;
case MOD_UNLOAD:
case MOD_SHUTDOWN:
pfs_vncache_unload();
pfs_fileno_unload();
break;
default:
printf("pseudofs: unexpected event type %d\n", evt);
break;
}
return 0;
}
/*
* Module declaration
*/
static moduledata_t pseudofs_data = {
"pseudofs",
pfs_modevent,
NULL
};
DECLARE_MODULE(pseudofs, pseudofs_data, SI_SUB_EXEC, SI_ORDER_FIRST);
MODULE_VERSION(pseudofs, 1);
|
