FreeBSD/Linux Kernel Cross Reference
sys/fs/fuse/fuse.h
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 * $FreeBSD$
56 */
57
58 #include "fuse_kernel.h"
59
60 #define FUSE_DEFAULT_DAEMON_TIMEOUT 60 /* s */
61 #define FUSE_MIN_DAEMON_TIMEOUT 0 /* s */
62 #define FUSE_MAX_DAEMON_TIMEOUT 600 /* s */
63
64 #ifndef FUSE_FREEBSD_VERSION
65 #define FUSE_FREEBSD_VERSION "0.4.4"
66 #endif
67
68 /* Mapping versions to features */
69
70 #define FUSE_KERNELABI_GEQ(maj, min) \
71 (FUSE_KERNEL_VERSION > (maj) || (FUSE_KERNEL_VERSION == (maj) && FUSE_KERNEL_MINOR_VERSION >= (min)))
72
73 /*
74 * Appearance of new FUSE operations is not always in par with version
75 * numbering... At least, 7.3 is a sufficient condition for having
76 * FUSE_{ACCESS,CREATE}.
77 */
78 #if FUSE_KERNELABI_GEQ(7, 3)
79 #ifndef FUSE_HAS_ACCESS
80 #define FUSE_HAS_ACCESS 1
81 #endif
82 #ifndef FUSE_HAS_CREATE
83 #define FUSE_HAS_CREATE 1
84 #endif
85 #else /* FUSE_KERNELABI_GEQ(7, 3) */
86 #ifndef FUSE_HAS_ACCESS
87 #define FUSE_HAS_ACCESS 0
88 #endif
89 #ifndef FUSE_HAS_CREATE
90 #define FUSE_HAS_CREATE 0
91 #endif
92 #endif
93
94 #if FUSE_KERNELABI_GEQ(7, 7)
95 #ifndef FUSE_HAS_GETLK
96 #define FUSE_HAS_GETLK 1
97 #endif
98 #ifndef FUSE_HAS_SETLK
99 #define FUSE_HAS_SETLK 1
100 #endif
101 #ifndef FUSE_HAS_SETLKW
102 #define FUSE_HAS_SETLKW 1
103 #endif
104 #ifndef FUSE_HAS_INTERRUPT
105 #define FUSE_HAS_INTERRUPT 1
106 #endif
107 #else /* FUSE_KERNELABI_GEQ(7, 7) */
108 #ifndef FUSE_HAS_GETLK
109 #define FUSE_HAS_GETLK 0
110 #endif
111 #ifndef FUSE_HAS_SETLK
112 #define FUSE_HAS_SETLK 0
113 #endif
114 #ifndef FUSE_HAS_SETLKW
115 #define FUSE_HAS_SETLKW 0
116 #endif
117 #ifndef FUSE_HAS_INTERRUPT
118 #define FUSE_HAS_INTERRUPT 0
119 #endif
120 #endif
121
122 #if FUSE_KERNELABI_GEQ(7, 8)
123 #ifndef FUSE_HAS_FLUSH_RELEASE
124 #define FUSE_HAS_FLUSH_RELEASE 1
125 /*
126 * "DESTROY" came in the middle of the 7.8 era,
127 * so this is not completely exact...
128 */
129 #ifndef FUSE_HAS_DESTROY
130 #define FUSE_HAS_DESTROY 1
131 #endif
132 #endif
133 #else /* FUSE_KERNELABI_GEQ(7, 8) */
134 #ifndef FUSE_HAS_FLUSH_RELEASE
135 #define FUSE_HAS_FLUSH_RELEASE 0
136 #ifndef FUSE_HAS_DESTROY
137 #define FUSE_HAS_DESTROY 0
138 #endif
139 #endif
140 #endif
141
142 /* misc */
143
144 SYSCTL_DECL(_vfs_fuse);
145
146 /* Fuse locking */
147
148 extern struct mtx fuse_mtx;
149 #define FUSE_LOCK() fuse_lck_mtx_lock(fuse_mtx)
150 #define FUSE_UNLOCK() fuse_lck_mtx_unlock(fuse_mtx)
151
152 #define RECTIFY_TDCR(td, cred) \
153 do { \
154 if (! (td)) \
155 (td) = curthread; \
156 if (! (cred)) \
157 (cred) = (td)->td_ucred; \
158 } while (0)
159
160 /* Debug related stuff */
161
162 #ifndef FUSE_DEBUG_DEVICE
163 #define FUSE_DEBUG_DEVICE 0
164 #endif
165
166 #ifndef FUSE_DEBUG_FILE
167 #define FUSE_DEBUG_FILE 0
168 #endif
169
170 #ifndef FUSE_DEBUG_INTERNAL
171 #define FUSE_DEBUG_INTERNAL 0
172 #endif
173
174 #ifndef FUSE_DEBUG_IO
175 #define FUSE_DEBUG_IO 0
176 #endif
177
178 #ifndef FUSE_DEBUG_IPC
179 #define FUSE_DEBUG_IPC 0
180 #endif
181
182 #ifndef FUSE_DEBUG_LOCK
183 #define FUSE_DEBUG_LOCK 0
184 #endif
185
186 #ifndef FUSE_DEBUG_VFSOPS
187 #define FUSE_DEBUG_VFSOPS 0
188 #endif
189
190 #ifndef FUSE_DEBUG_VNOPS
191 #define FUSE_DEBUG_VNOPS 0
192 #endif
193
194 #ifndef FUSE_TRACE
195 #define FUSE_TRACE 0
196 #endif
197
198 #define DEBUGX(cond, fmt, ...) do { \
199 if (((cond))) { \
200 printf("%s: " fmt, __func__, ## __VA_ARGS__); \
201 } } while (0)
202
203 #define fuse_lck_mtx_lock(mtx) do { \
204 DEBUGX(FUSE_DEBUG_LOCK, "0: lock(%s): %s@%d by %d\n", \
205 __STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
206 mtx_lock(&(mtx)); \
207 DEBUGX(FUSE_DEBUG_LOCK, "1: lock(%s): %s@%d by %d\n", \
208 __STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
209 } while (0)
210
211 #define fuse_lck_mtx_unlock(mtx) do { \
212 DEBUGX(FUSE_DEBUG_LOCK, "0: unlock(%s): %s@%d by %d\n", \
213 __STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
214 mtx_unlock(&(mtx)); \
215 DEBUGX(FUSE_DEBUG_LOCK, "1: unlock(%s): %s@%d by %d\n", \
216 __STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
217 } while (0)
218
219 void fuse_ipc_init(void);
220 void fuse_ipc_destroy(void);
221
222 int fuse_device_init(void);
223 void fuse_device_destroy(void);
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