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("$FreeBSD$"); 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); 163