1 /* 2 * Copyright (c) 2007-2009 Google Inc. and Amit Singh 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 * $FreeBSD$ 56 */ 57 58 #ifndef _FUSE_FILE_H_ 59 #define _FUSE_FILE_H_ 60 61 #include <sys/types.h> 62 #include <sys/fcntl.h> 63 #include <sys/stat.h> 64 #include <sys/mman.h> 65 #include <sys/vnode.h> 66 67 typedef enum fufh_type { 68 FUFH_INVALID = -1, 69 FUFH_RDONLY = 0, 70 FUFH_WRONLY = 1, 71 FUFH_RDWR = 2, 72 FUFH_MAXTYPE = 3, 73 } fufh_type_t; 74 75 struct fuse_filehandle { 76 uint64_t fh_id; 77 fufh_type_t fh_type; 78 }; 79 80 #define FUFH_IS_VALID(f) ((f)->fh_type != FUFH_INVALID) 81 82 static __inline__ 83 fufh_type_t 84 fuse_filehandle_xlate_from_mmap(int fflags) 85 { 86 if (fflags & (PROT_READ | PROT_WRITE)) { 87 return FUFH_RDWR; 88 } else if (fflags & (PROT_WRITE)) { 89 return FUFH_WRONLY; 90 } else if ((fflags & PROT_READ) || (fflags & PROT_EXEC)) { 91 return FUFH_RDONLY; 92 } else { 93 return FUFH_INVALID; 94 } 95 } 96 97 static __inline__ 98 fufh_type_t 99 fuse_filehandle_xlate_from_fflags(int fflags) 100 { 101 if ((fflags & FREAD) && (fflags & FWRITE)) { 102 return FUFH_RDWR; 103 } else if (fflags & (FWRITE)) { 104 return FUFH_WRONLY; 105 } else if (fflags & (FREAD)) { 106 return FUFH_RDONLY; 107 } else { 108 panic("FUSE: What kind of a flag is this (%x)?", fflags); 109 } 110 } 111 112 static __inline__ 113 int 114 fuse_filehandle_xlate_to_oflags(fufh_type_t type) 115 { 116 int oflags = -1; 117 118 switch (type) { 119 120 case FUFH_RDONLY: 121 oflags = O_RDONLY; 122 break; 123 124 case FUFH_WRONLY: 125 oflags = O_WRONLY; 126 break; 127 128 case FUFH_RDWR: 129 oflags = O_RDWR; 130 break; 131 132 default: 133 break; 134 } 135 136 return oflags; 137 } 138 139 int fuse_filehandle_valid(struct vnode *vp, fufh_type_t fufh_type); 140 int fuse_filehandle_get(struct vnode *vp, fufh_type_t fufh_type, 141 struct fuse_filehandle **fufhp); 142 int fuse_filehandle_getrw(struct vnode *vp, fufh_type_t fufh_type, 143 struct fuse_filehandle **fufhp); 144 145 void fuse_filehandle_init(struct vnode *vp, fufh_type_t fufh_type, 146 struct fuse_filehandle **fufhp, uint64_t fh_id); 147 int fuse_filehandle_open(struct vnode *vp, fufh_type_t fufh_type, 148 struct fuse_filehandle **fufhp, struct thread *td, 149 struct ucred *cred); 150 int fuse_filehandle_close(struct vnode *vp, fufh_type_t fufh_type, 151 struct thread *td, struct ucred *cred); 152 153 #endif /* _FUSE_FILE_H_ */ 154