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    1: .\" -*- nroff -*-
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    3: .\" Copyright (c) 1996 Doug Rabson
    4: .\"
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   29: .\" $FreeBSD: src/share/man/man9/VFS_MOUNT.9,v 1.7.2.1 2001/12/17 11:30:18 ru Exp $
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   32: .Dd July 24, 1996
   33: .Os
   34: .Dt VFS_MOUNT 9
   35: .Sh NAME
   36: .Nm VFS_MOUNT
   37: .Nd mount a filesystem
   38: .Sh SYNOPSIS
   39: .In sys/param.h
   40: .In sys/mount.h
   41: .In sys/vnode.h
   42: .Ft int
   43: .Fn VFS_MOUNT "struct mount *mp" "char *path" "caddr_t data" "struct nameidata *ndp" "struct proc *p"
   44: .Sh DESCRIPTION
   45: Mount a filesystem into the system's namespace.
   46: .Pp
   47: Its arguments are:
   48: .Bl -tag -width data
   49: .It Ar mp
   50: Structure representing the filesystem.
   51: .It Ar path
   52: Pathname where the filesystem is being mounted.
   53: .It Ar data
   54: Filesystem specific data.  This should be read into the kernel using
   55: .Xr copyin 9 .
   56: .It Ar ndp
   57: Contains the result of a
   58: .Xr namei 9
   59: call on the pathname of the mountpoint.
   60: .It Ar p
   61: Process which is mounting the filesystem.
   62: .El
   63: .Pp
   64: This is called both to mount new filesystems and to change the
   65: attributes of an existing filesystem.  If the
   66: .Dv MNT_UPDATE
   67: flag is set in
   68: .Fa mp->mnt_flag
   69: then the filesystem should update its internal state from the value of
   70: .Fa mp->mnt_flag .
   71: This can be used, for instance, to convert a read-only filesystem to
   72: read-write.
   73: It is also used by
   74: .Xr mountd 8
   75: to update the NFS export information for the filesystem.
   76: .Pp
   77: If the
   78: .Dv MNT_UPDATE
   79: flag is not specified, then this is a newly mounted filesystem.  The
   80: filesystem code should allocate and initialize
   81: any private data needed to represent
   82: the filesystem (it can use the
   83: .Fa mp->mnt_data
   84: field to store this information).
   85: .Sh SEE ALSO
   86: .Xr VFS 9 ,
   87: .Xr vnode 9
   88: .Sh AUTHORS
   89: This man page was written by
   90: .An Doug Rabson .