xref: /freebsd/share/man/man9/VFS_SET.9 (revision 1ba4a712dde6e6c613fc411a96958b4ade67de4c)

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.Dd April 5, 2007
.Dt VFS_SET 9
.Os
.Sh NAME
.Nm VFS_SET
.Nd set up loadable file system
.Vt vfsconf
.Sh SYNOPSIS
.In sys/param.h
.In sys/kernel.h
.In sys/module.h
.In sys/mount.h
.Ft void
.Fn VFS_SET "struct vfsops *vfsops" "fsname" "int flags"
.Sh DESCRIPTION
.Fn VFS_SET
creates a
.Vt vfsconf
structure for the loadable module with the given
.Fa vfsops , fsname
and
.Fa flags ,
and declares it by calling
.Xr DECLARE_MODULE 9
using
.Fn vfs_modevent
as the event handler.
.Pp
Possible values for the
.Fa flags
argument are:
.Bl -hang -width ".Dv VFCF_DELEGADMIN"
.It Dv VFCF_STATIC
File system should be statically available in the kernel.
.It Dv VFCF_NETWORK
Network exportable file system.
.It Dv VFCF_READONLY
Does not support write operations.
.It Dv VFCF_SYNTHETIC
Pseudo file system, data does not represent on-disk files.
.It Dv VFCF_LOOPBACK
Loopback file system layer.
.It Dv VFCF_UNICODE
File names are stored as Unicode.
.It Dv VFCF_JAIL
Can be mounted from within a jail if
.Va security.jail.mount_allowed
sysctl is set to
.Dv 1 .
.It Dv VFCF_DELEGADMIN
Supports delegated administration if
.Va vfs.usermount
sysctl is set to
.Dv 1 .
.El
.Sh PSEUDOCODE
.Bd -literal
/*
 * fill in the ones we use, and use the vfs_std for the rest.
 */
static struct vfsops myfs_vfsops = {
        myfs_mount,
        vfs_stdstart,
        myfs_unmount,
        myfs_root,
        vfs_stdquotactl,
        myfs_statfs,
        vfs_stdsync,
        vfs_stdvget,
        vfs_stdfhtovp,
        vfs_stdcheckexp,
        vfs_stdvptofh,
        vfs_stdinit,
        vfs_stduninit,
        vfs_stdextattrctl,
};

VFS_SET(myfs_vfsops, skelfs, 0);
.Ed
.Sh SEE ALSO
.Xr jail 2 ,
.Xr jail 8 ,
.Xr DECLARE_MODULE 9 ,
.Xr vfsconf 9 ,
.Xr vfs_modevent 9
.Sh AUTHORS
This manual page was written by
.An Chad David Aq davidc@acns.ab.ca .