145 lines
4.7 KiB
Groff
145 lines
4.7 KiB
Groff
.\"-
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.\" Copyright (c) 2007 Xin LI
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\"-
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.\" Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 23, 2012
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.Dt TMPFS 5
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.Os
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.Sh NAME
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.Nm tmpfs
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.Nd "efficient memory file system"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "options TMPFS"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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tmpfs_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver will permit the
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.Fx
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kernel to access
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.Tn tmpfs
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file systems.
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.Sh OPTIONS
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The following options are available when
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mounting
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.Nm
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file systems:
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.Bl -tag -width indent
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.It Cm gid
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Specifies the group ID of the root inode of the file system.
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Defaults to the mount point's GID.
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.It Cm uid
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Specifies the user ID of the root inode of the file system.
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Defaults to the mount point's UID.
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.It Cm mode
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Specifies the mode (in octal notation) of the root inode of the file system.
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Defaults to the mount point's mode.
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.It Cm inodes
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Specifies the maximum number of nodes available to the file system.
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If not specified, the file system chooses a reasonable maximum based on
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the file system size, which can be limited with the
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.Cm size
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option.
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.It Cm size
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Specifies the total file system size in bytes.
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If zero (the default) or a value larger than SIZE_MAX - PAGE_SIZE
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is given, the available amount of memory (including
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main memory and swap space) will be used.
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.It Cm maxfilesize
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Specifies the maximum file size in bytes.
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Defaults to the maximum possible value.
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.El
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.Sh EXAMPLES
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To mount a
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.Nm
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memory file system:
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.Pp
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.Dl "mount -t tmpfs tmpfs /tmp"
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.Sh SEE ALSO
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.Xr nmount 2 ,
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.Xr unmount 2 ,
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.Xr fstab 5 ,
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.Xr mdmfs 8 ,
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.Xr mount 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 7.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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kernel implementation was written by
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.An Julio M. Merino Vidal Aq Mt jmmv@NetBSD.org
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as a Google SoC project.
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.Pp
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.An Rohit Jalan
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and others ported it from
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.Nx
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to
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.Fx .
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.Pp
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This manual page was written by
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.An Xin LI Aq Mt delphij@FreeBSD.org .
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.Sh BUGS
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Some file system mount time options may not be well-supported.
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