1 /*
2 * Copyright (c) 2007-2009 Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Copyright (C) 2005 Csaba Henk.
32 * All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 *
43 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 */
55
56 #include <sys/cdefs.h>
57 __FBSDID("$FreeBSD: releng/10.1/sys/fs/fuse/fuse_main.c 241519 2012-10-13 23:54:26Z attilio $");
58
59 #include <sys/types.h>
60 #include <sys/module.h>
61 #include <sys/systm.h>
62 #include <sys/errno.h>
63 #include <sys/param.h>
64 #include <sys/kernel.h>
65 #include <sys/conf.h>
66 #include <sys/mutex.h>
67 #include <sys/proc.h>
68 #include <sys/mount.h>
69 #include <sys/vnode.h>
70 #include <sys/stat.h>
71 #include <sys/file.h>
72 #include <sys/buf.h>
73 #include <sys/sysctl.h>
74
75 #include "fuse.h"
76
77 static void fuse_bringdown(eventhandler_tag eh_tag);
78 static int fuse_loader(struct module *m, int what, void *arg);
79
80 struct mtx fuse_mtx;
81
82 extern struct vfsops fuse_vfsops;
83 extern struct cdevsw fuse_cdevsw;
84 extern struct vop_vector fuse_vnops;
85 extern int fuse_pbuf_freecnt;
86
87 static struct vfsconf fuse_vfsconf = {
88 .vfc_version = VFS_VERSION,
89 .vfc_name = "fusefs",
90 .vfc_vfsops = &fuse_vfsops,
91 .vfc_typenum = -1,
92 .vfc_flags = VFCF_SYNTHETIC
93 };
94
95 SYSCTL_INT(_vfs_fuse, OID_AUTO, kernelabi_major, CTLFLAG_RD,
96 0, FUSE_KERNEL_VERSION, "FUSE kernel abi major version");
97 SYSCTL_INT(_vfs_fuse, OID_AUTO, kernelabi_minor, CTLFLAG_RD,
98 0, FUSE_KERNEL_MINOR_VERSION, "FUSE kernel abi minor version");
99
100 /******************************
101 *
102 * >>> Module management stuff
103 *
104 ******************************/
105
106 static void
107 fuse_bringdown(eventhandler_tag eh_tag)
108 {
109
110 fuse_ipc_destroy();
111 fuse_device_destroy();
112 mtx_destroy(&fuse_mtx);
113 }
114
115 static int
116 fuse_loader(struct module *m, int what, void *arg)
117 {
118 static eventhandler_tag eh_tag = NULL;
119 int err = 0;
120
121 switch (what) {
122 case MOD_LOAD: /* kldload */
123 fuse_pbuf_freecnt = nswbuf / 2 + 1;
124 mtx_init(&fuse_mtx, "fuse_mtx", NULL, MTX_DEF);
125 err = fuse_device_init();
126 if (err) {
127 mtx_destroy(&fuse_mtx);
128 return (err);
129 }
130 fuse_ipc_init();
131
132 /* vfs_modevent ignores its first arg */
133 if ((err = vfs_modevent(NULL, what, &fuse_vfsconf)))
134 fuse_bringdown(eh_tag);
135 else
136 printf("fuse-freebsd: version %s, FUSE ABI %d.%d\n",
137 FUSE_FREEBSD_VERSION,
138 FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
139
140 break;
141 case MOD_UNLOAD:
142 if ((err = vfs_modevent(NULL, what, &fuse_vfsconf)))
143 return (err);
144 fuse_bringdown(eh_tag);
145 break;
146 default:
147 return (EINVAL);
148 }
149
150 return (err);
151 }
152
153 /* Registering the module */
154
155 static moduledata_t fuse_moddata = {
156 "fuse",
157 fuse_loader,
158 &fuse_vfsconf
159 };
160
161 DECLARE_MODULE(fuse, fuse_moddata, SI_SUB_VFS, SI_ORDER_MIDDLE);
162 MODULE_VERSION(fuse, 1);
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