* Copyright (c) 1989 Jan-Simon Pendry
* Copyright (c) 1989 Imperial College of Science, Technology & Medicine
* Copyright (c) 1989 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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
* @(#)ifs_ops.c 5.3 (Berkeley) 5/12/91
* $Id: ifs_ops.c,v 5.2.1.4 91/05/07 22:17:55 jsp Alpha $
* Inheritance file system.
* This implements a filesystem restart.
* This is a *gross* hack - it knows far too
* much about the way other parts of the
* sytem work. See restart.c too.
static char not_a_filesystem
[] = "Attempting to inherit not-a-filesystem";
* This should never be called.
static char *ifs_match
P((am_opts
*fo
));
static char *ifs_match(fo
)
plog(XLOG_FATAL
, "ifs_match called!");
static int ifs_init
P((mntfs
*mf
));
mntfs
*mf_link
= (mntfs
*) mf
->mf_private
;
plog(XLOG_FATAL
, not_a_filesystem
);
* Fill in attribute fields
mf_link
->mf_fattr
.type
= NFLNK
;
mf_link
->mf_fattr
.mode
= NFSMODE_LNK
| 0777;
mf_link
->mf_fattr
.nlink
= 1;
mf_link
->mf_fattr
.size
= MAXPATHLEN
/ 4;
if (mf_link
->mf_ops
->fs_init
)
return (*mf_link
->mf_ops
->fs_init
)(mf_link
);
static mntfs
*ifs_inherit
P((mntfs
*mf
));
static mntfs
*ifs_inherit(mf
)
* Take the linked mount point and
mntfs
*mf_link
= (mntfs
*) mf
->mf_private
;
plog(XLOG_FATAL
, not_a_filesystem
);
mf_link
->mf_fo
= mf
->mf_fo
;
mf_link
->mf_fattr
.fileid
= mf
->mf_fattr
.fileid
;
* Don't call am_unmounted since this
* node was never really mounted in the
* Free the dangling reference
* Get a hold of the other entry
mf_link
->mf_flags
&= ~MFF_RESTART
;
plog(XLOG_INFO
, "restarting %s on %s", mf_link
->mf_info
, mf_link
->mf_mount
);
static int ifs_mount
P((am_node
*mp
));
mntfs
*newmf
= ifs_inherit(mp
->am_mnt
);
* XXX - must do the am_mounted call here
if (newmf
->mf_ops
->fs_flags
& FS_MBACKGROUND
)
static int ifs_fmount
P((mntfs
*mf
));
static int ifs_fmount(mf
)
am_node
*mp
= find_mf(mf
);
return ifs_inherit(mf
) ? 0 : EINVAL
;
static int ifs_fumount
P((mntfs
*mf
));
static int ifs_fumount(mf
)