.\" Copyright (c) 1996 Doug Rabson .\" .\" All rights reserved. .\" .\" This program is free software. .\" .\" 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 THE DEVELOPERS ``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 DEVELOPERS 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: src/share/man/man9/VFS_MOUNT.9,v 1.7.2.1 2001/12/17 11:30:18 ru Exp $ .\" .Dd December 16, 2012 .Dt VFS_MOUNT 9 .Os .Sh NAME .Nm VFS_MOUNT .Nd mount a filesystem .Sh SYNOPSIS .In sys/param.h .In sys/mount.h .In sys/vnode.h .Ft int .Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct ucred *cred" .Sh DESCRIPTION Mount a filesystem into the system's namespace. .Pp Its arguments are: .Bl -tag -width data .It Ar mp Structure representing the filesystem. .It Ar path Pathname where the filesystem is being mounted. .It Ar data Filesystem specific data. This should be read into the kernel using .Xr copyin 9 . .It Ar cred Pointer to a .Vt struct ucred for user credentials checking. .El .Pp This is called both to mount new filesystems and to change the attributes of an existing filesystem. If the .Dv MNT_UPDATE flag is set in .Fa mp->mnt_flag then the filesystem should update its internal state from the value of .Fa mp->mnt_flag . This can be used, for instance, to convert a read-only filesystem to read-write. It is also used by .Xr mountd 8 to update the NFS export information for the filesystem. .Pp If the .Dv MNT_UPDATE flag is not specified, then this is a newly mounted filesystem. The filesystem code should allocate and initialize any private data needed to represent the filesystem (it can use the .Fa mp->mnt_data field to store this information). .Sh SEE ALSO .Xr VFS 9 , .Xr vnode 9 .Sh AUTHORS This man page was written by .An Doug Rabson .