1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2007-2009 Google Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are 9 * met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above 14 * copyright notice, this list of conditions and the following disclaimer 15 * in the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Google Inc. nor the names of its 18 * contributors may be used to endorse or promote products derived from 19 * this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * Copyright (C) 2005 Csaba Henk. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 58 #include <sys/cdefs.h> 59 __FBSDID("$FreeBSD$"); 60 61 #include <sys/types.h> 62 #include <sys/module.h> 63 #include <sys/systm.h> 64 #include <sys/errno.h> 65 #include <sys/param.h> 66 #include <sys/kernel.h> 67 #include <sys/conf.h> 68 #include <sys/mutex.h> 69 #include <sys/proc.h> 70 #include <sys/mount.h> 71 #include <sys/vnode.h> 72 #include <sys/stat.h> 73 #include <sys/file.h> 74 #include <sys/buf.h> 75 #include <sys/sysctl.h> 76 77 #include "fuse.h" 78 79 static void fuse_bringdown(eventhandler_tag eh_tag); 80 static int fuse_loader(struct module *m, int what, void *arg); 81 82 struct mtx fuse_mtx; 83 84 extern struct vfsops fuse_vfsops; 85 extern struct cdevsw fuse_cdevsw; 86 extern struct vop_vector fuse_vnops; 87 extern int fuse_pbuf_freecnt; 88 89 static struct vfsconf fuse_vfsconf = { 90 .vfc_version = VFS_VERSION, 91 .vfc_name = "fusefs", 92 .vfc_vfsops = &fuse_vfsops, 93 .vfc_typenum = -1, 94 .vfc_flags = VFCF_SYNTHETIC 95 }; 96 97 SYSCTL_INT(_vfs_fuse, OID_AUTO, kernelabi_major, CTLFLAG_RD, 98 SYSCTL_NULL_INT_PTR, FUSE_KERNEL_VERSION, "FUSE kernel abi major version"); 99 SYSCTL_INT(_vfs_fuse, OID_AUTO, kernelabi_minor, CTLFLAG_RD, 100 SYSCTL_NULL_INT_PTR, FUSE_KERNEL_MINOR_VERSION, "FUSE kernel abi minor version"); 101 102 /****************************** 103 * 104 * >>> Module management stuff 105 * 106 ******************************/ 107 108 static void 109 fuse_bringdown(eventhandler_tag eh_tag) 110 { 111 112 fuse_ipc_destroy(); 113 fuse_device_destroy(); 114 mtx_destroy(&fuse_mtx); 115 } 116 117 static int 118 fuse_loader(struct module *m, int what, void *arg) 119 { 120 static eventhandler_tag eh_tag = NULL; 121 int err = 0; 122 123 switch (what) { 124 case MOD_LOAD: /* kldload */ 125 fuse_pbuf_freecnt = nswbuf / 2 + 1; 126 mtx_init(&fuse_mtx, "fuse_mtx", NULL, MTX_DEF); 127 err = fuse_device_init(); 128 if (err) { 129 mtx_destroy(&fuse_mtx); 130 return (err); 131 } 132 fuse_ipc_init(); 133 134 /* vfs_modevent ignores its first arg */ 135 if ((err = vfs_modevent(NULL, what, &fuse_vfsconf))) 136 fuse_bringdown(eh_tag); 137 else 138 printf("fuse-freebsd: version %s, FUSE ABI %d.%d\n", 139 FUSE_FREEBSD_VERSION, 140 FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION); 141 142 break; 143 case MOD_UNLOAD: 144 if ((err = vfs_modevent(NULL, what, &fuse_vfsconf))) 145 return (err); 146 fuse_bringdown(eh_tag); 147 break; 148 default: 149 return (EINVAL); 150 } 151 152 return (err); 153 } 154 155 /* Registering the module */ 156 157 static moduledata_t fuse_moddata = { 158 "fuse", 159 fuse_loader, 160 &fuse_vfsconf 161 }; 162 163 DECLARE_MODULE(fuse, fuse_moddata, SI_SUB_VFS, SI_ORDER_MIDDLE); 164 MODULE_VERSION(fuse, 1); 165