1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2007-2009 Google Inc. and Amit Singh 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 * $FreeBSD$ 58 */ 59 60 #ifndef _FUSE_FILE_H_ 61 #define _FUSE_FILE_H_ 62 63 #include <sys/types.h> 64 #include <sys/fcntl.h> 65 #include <sys/stat.h> 66 #include <sys/mman.h> 67 #include <sys/vnode.h> 68 69 typedef enum fufh_type { 70 FUFH_INVALID = -1, 71 FUFH_RDONLY = 0, 72 FUFH_WRONLY = 1, 73 FUFH_RDWR = 2, 74 FUFH_MAXTYPE = 3, 75 } fufh_type_t; 76 77 struct fuse_filehandle { 78 uint64_t fh_id; 79 fufh_type_t fh_type; 80 }; 81 82 #define FUFH_IS_VALID(f) ((f)->fh_type != FUFH_INVALID) 83 84 static __inline__ 85 fufh_type_t 86 fuse_filehandle_xlate_from_mmap(int fflags) 87 { 88 if (fflags & (PROT_READ | PROT_WRITE)) { 89 return FUFH_RDWR; 90 } else if (fflags & (PROT_WRITE)) { 91 return FUFH_WRONLY; 92 } else if ((fflags & PROT_READ) || (fflags & PROT_EXEC)) { 93 return FUFH_RDONLY; 94 } else { 95 return FUFH_INVALID; 96 } 97 } 98 99 static __inline__ 100 fufh_type_t 101 fuse_filehandle_xlate_from_fflags(int fflags) 102 { 103 if ((fflags & FREAD) && (fflags & FWRITE)) { 104 return FUFH_RDWR; 105 } else if (fflags & (FWRITE)) { 106 return FUFH_WRONLY; 107 } else if (fflags & (FREAD)) { 108 return FUFH_RDONLY; 109 } else { 110 panic("FUSE: What kind of a flag is this (%x)?", fflags); 111 } 112 } 113 114 static __inline__ 115 int 116 fuse_filehandle_xlate_to_oflags(fufh_type_t type) 117 { 118 int oflags = -1; 119 120 switch (type) { 121 122 case FUFH_RDONLY: 123 oflags = O_RDONLY; 124 break; 125 126 case FUFH_WRONLY: 127 oflags = O_WRONLY; 128 break; 129 130 case FUFH_RDWR: 131 oflags = O_RDWR; 132 break; 133 134 default: 135 break; 136 } 137 138 return oflags; 139 } 140 141 int fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type); 142 fufh_type_t fuse_filehandle_validrw(struct vnode *vp, fufh_type_t fufh_type); 143 int fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type, 144 struct fuse_filehandle **fufhp); 145 int fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type, 146 struct fuse_filehandle **fufhp); 147 148 void fuse_filehandle_init(struct vnode *vp, fufh_type_t fufh_type, 149 struct fuse_filehandle **fufhp, uint64_t fh_id); 150 int fuse_filehandle_open(struct vnode *vp, fufh_type_t fufh_type, 151 struct fuse_filehandle **fufhp, struct thread *td, 152 struct ucred *cred); 153 int fuse_filehandle_close(struct vnode *vp, fufh_type_t fufh_type, 154 struct thread *td, struct ucred *cred); 155 156 #endif /* _FUSE_FILE_H_ */ 157