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freebsd-skq/sys/fs/fuse/fuse.h
attilio af2d834e29 Import a FreeBSD port of the FUSE Linux module. 
This has been developed during 2 summer of code mandates and being revived
by gnn recently.
The functionality in this commit mirrors entirely content of fusefs-kmod
port, which doesn't need to be installed anymore for -CURRENT setups.

In order to get some sparse technical notes, please refer to:
http://lists.freebsd.org/pipermail/freebsd-fs/2012-March/013876.html

or to the project branch:
svn://svn.freebsd.org/base/projects/fuse/

which also contains granular history of changes happened during port
refinements. This commit does not came from the branch reintegration
itself because it seems svn is not behaving properly for this functionaly
at the moment.

Partly Sponsored by:		Google, Summer of Code program 2005, 2011
Originally submitted by:	ilya, Csaba Henk <csaba-ml AT creo DOT hu >
In collabouration with:		pho
Tested by:			flo, gnn, Gustau Perez,
				Kevin Oberman <rkoberman AT gmail DOT com>
MFC after:			2 months
2012-10-13 23:54:26 +00:00

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/*
* Copyright (c) 2007-2009 Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright (C) 2005 Csaba Henk.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "fuse_kernel.h"
#define FUSE_DEFAULT_DAEMON_TIMEOUT 60 /* s */
#define FUSE_MIN_DAEMON_TIMEOUT 0 /* s */
#define FUSE_MAX_DAEMON_TIMEOUT 600 /* s */
#ifndef FUSE_FREEBSD_VERSION
#define FUSE_FREEBSD_VERSION "0.4.4"
#endif
/* Mapping versions to features */
#define FUSE_KERNELABI_GEQ(maj, min) \
(FUSE_KERNEL_VERSION > (maj) || (FUSE_KERNEL_VERSION == (maj) && FUSE_KERNEL_MINOR_VERSION >= (min)))
/*
* Appearance of new FUSE operations is not always in par with version
* numbering... At least, 7.3 is a sufficient condition for having
* FUSE_{ACCESS,CREATE}.
*/
#if FUSE_KERNELABI_GEQ(7, 3)
#ifndef FUSE_HAS_ACCESS
#define FUSE_HAS_ACCESS 1
#endif
#ifndef FUSE_HAS_CREATE
#define FUSE_HAS_CREATE 1
#endif
#else /* FUSE_KERNELABI_GEQ(7, 3) */
#ifndef FUSE_HAS_ACCESS
#define FUSE_HAS_ACCESS 0
#endif
#ifndef FUSE_HAS_CREATE
#define FUSE_HAS_CREATE 0
#endif
#endif
#if FUSE_KERNELABI_GEQ(7, 7)
#ifndef FUSE_HAS_GETLK
#define FUSE_HAS_GETLK 1
#endif
#ifndef FUSE_HAS_SETLK
#define FUSE_HAS_SETLK 1
#endif
#ifndef FUSE_HAS_SETLKW
#define FUSE_HAS_SETLKW 1
#endif
#ifndef FUSE_HAS_INTERRUPT
#define FUSE_HAS_INTERRUPT 1
#endif
#else /* FUSE_KERNELABI_GEQ(7, 7) */
#ifndef FUSE_HAS_GETLK
#define FUSE_HAS_GETLK 0
#endif
#ifndef FUSE_HAS_SETLK
#define FUSE_HAS_SETLK 0
#endif
#ifndef FUSE_HAS_SETLKW
#define FUSE_HAS_SETLKW 0
#endif
#ifndef FUSE_HAS_INTERRUPT
#define FUSE_HAS_INTERRUPT 0
#endif
#endif
#if FUSE_KERNELABI_GEQ(7, 8)
#ifndef FUSE_HAS_FLUSH_RELEASE
#define FUSE_HAS_FLUSH_RELEASE 1
/*
* "DESTROY" came in the middle of the 7.8 era,
* so this is not completely exact...
*/
#ifndef FUSE_HAS_DESTROY
#define FUSE_HAS_DESTROY 1
#endif
#endif
#else /* FUSE_KERNELABI_GEQ(7, 8) */
#ifndef FUSE_HAS_FLUSH_RELEASE
#define FUSE_HAS_FLUSH_RELEASE 0
#ifndef FUSE_HAS_DESTROY
#define FUSE_HAS_DESTROY 0
#endif
#endif
#endif
/* misc */
SYSCTL_DECL(_vfs_fuse);
/* Fuse locking */
extern struct mtx fuse_mtx;
#define FUSE_LOCK() fuse_lck_mtx_lock(fuse_mtx)
#define FUSE_UNLOCK() fuse_lck_mtx_unlock(fuse_mtx)
#define RECTIFY_TDCR(td, cred) \
do { \
if (! (td)) \
(td) = curthread; \
if (! (cred)) \
(cred) = (td)->td_ucred; \
} while (0)
/* Debug related stuff */
#ifndef FUSE_DEBUG_DEVICE
#define FUSE_DEBUG_DEVICE 0
#endif
#ifndef FUSE_DEBUG_FILE
#define FUSE_DEBUG_FILE 0
#endif
#ifndef FUSE_DEBUG_INTERNAL
#define FUSE_DEBUG_INTERNAL 0
#endif
#ifndef FUSE_DEBUG_IO
#define FUSE_DEBUG_IO 0
#endif
#ifndef FUSE_DEBUG_IPC
#define FUSE_DEBUG_IPC 0
#endif
#ifndef FUSE_DEBUG_LOCK
#define FUSE_DEBUG_LOCK 0
#endif
#ifndef FUSE_DEBUG_VFSOPS
#define FUSE_DEBUG_VFSOPS 0
#endif
#ifndef FUSE_DEBUG_VNOPS
#define FUSE_DEBUG_VNOPS 0
#endif
#ifndef FUSE_TRACE
#define FUSE_TRACE 0
#endif
#define DEBUGX(cond, fmt, ...) do { \
if (((cond))) { \
printf("%s: " fmt, __func__, ## __VA_ARGS__); \
} } while (0)
#define fuse_lck_mtx_lock(mtx) do { \
DEBUGX(FUSE_DEBUG_LOCK, "0: lock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
mtx_lock(&(mtx)); \
DEBUGX(FUSE_DEBUG_LOCK, "1: lock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
} while (0)
#define fuse_lck_mtx_unlock(mtx) do { \
DEBUGX(FUSE_DEBUG_LOCK, "0: unlock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
mtx_unlock(&(mtx)); \
DEBUGX(FUSE_DEBUG_LOCK, "1: unlock(%s): %s@%d by %d\n", \
__STRING(mtx), __func__, __LINE__, curthread->td_proc->p_pid); \
} while (0)
void fuse_ipc_init(void);
void fuse_ipc_destroy(void);
int fuse_device_init(void);
void fuse_device_destroy(void);
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