xref: /freebsd-10.2-release/sys/fs/fuse/fuse_param.h

/*
 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
 * 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.
 *
 * $FreeBSD: releng/10.2/sys/fs/fuse/fuse_param.h 241519 2012-10-13 23:54:26Z attilio $
 */

#ifndef _FUSE_PARAM_H_
#define _FUSE_PARAM_H_

/*
 * This is the prefix ("fuse" by default) of the name of a FUSE device node
 * in devfs. The suffix is the device number. "/dev/fuse0" is the first FUSE
 * device by default. If you change the prefix from the default to something
 * else, the user-space FUSE library will need to know about it too.
 */
#define FUSE_DEVICE_BASENAME               "fuse"

/*
 * This is the number of /dev/fuse<n> nodes we will create. <n> goes from
 * 0 to (FUSE_NDEVICES - 1).
 */
#define FUSE_NDEVICES                      16

/*
 * This is the default block size of the virtual storage devices that are
 * implicitly implemented by the FUSE kernel extension. This can be changed
 * on a per-mount basis (there's one such virtual device for each mount).
 */
#define FUSE_DEFAULT_BLOCKSIZE             4096

/*
 * This is default I/O size used while accessing the virtual storage devices.
 * This can be changed on a per-mount basis.
 */
#define FUSE_DEFAULT_IOSIZE                4096

#ifdef KERNEL

/*
 * This is the soft upper limit on the number of "request tickets" FUSE's
 * user-kernel IPC layer can have for a given mount. This can be modified
 * through the fuse.* sysctl interface.
 */
#define FUSE_DEFAULT_MAX_FREE_TICKETS      1024

#define FUSE_DEFAULT_IOV_PERMANENT_BUFSIZE (1L << 19)
#define FUSE_DEFAULT_IOV_CREDIT            16

#endif

#define FUSE_LINK_MAX                      LINK_MAX

#endif /* _FUSE_PARAM_H_ */