GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/amd/amd/ifs_ops.c Lines: 0 33 0.0 %
Date: 2016-12-06 Branches: 0 14 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 1989 Jan-Simon Pendry
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 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
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 * Copyright (c) 1989, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Jan-Simon Pendry at Imperial College, London.
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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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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 *	from: @(#)ifs_ops.c	8.1 (Berkeley) 6/6/93
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 *	$Id: ifs_ops.c,v 1.5 2014/10/26 02:43:50 guenther Exp $
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 */
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#include "am.h"
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#ifdef HAS_IFS
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/*
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 * Inheritance file system.
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 * This implements a filesystem restart.
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 *
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 * This is a *gross* hack - it knows far too
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 * much about the way other parts of the
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 * sytem work.  See restart.c too.
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 */
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static char not_a_filesystem[] = "Attempting to inherit not-a-filesystem";
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/*
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 * This should never be called.
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 */
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static char *
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ifs_match(am_opts *fo)
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{
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	plog(XLOG_FATAL, "ifs_match called!");
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	return 0;
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}
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static int
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ifs_init(mntfs *mf)
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{
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	mntfs *mf_link = (mntfs *) mf->mf_private;
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	if (mf_link == 0) {
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		plog(XLOG_FATAL, not_a_filesystem);
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		return EINVAL;
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	}
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#ifdef notdef
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	/*
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	 * Fill in attribute fields
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	 */
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	mf_link->mf_fattr.type = NFLNK;
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	mf_link->mf_fattr.mode = NFSMODE_LNK | 0777;
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	mf_link->mf_fattr.nlink = 1;
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	mf_link->mf_fattr.size = MAXPATHLEN / 4;
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#endif
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	if (mf_link->mf_ops->fs_init)
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		return (*mf_link->mf_ops->fs_init)(mf_link);
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	return 0;
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}
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static mntfs *
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ifs_inherit(mntfs *mf)
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{
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	/*
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	 * Take the linked mount point and
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	 * propagate.
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	 */
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	mntfs *mf_link = (mntfs *) mf->mf_private;
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	if (mf_link == 0) {
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		plog(XLOG_FATAL, not_a_filesystem);
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		return 0;	/*XXX*/
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	}
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	mf_link->mf_fo = mf->mf_fo;
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#ifdef notdef
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	mf_link->mf_fattr.fileid = mf->mf_fattr.fileid;
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#endif /* notdef */
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	/*
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	 * Discard the old map.
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	 * Don't call am_unmounted since this
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	 * node was never really mounted in the
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	 * first place.
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	 */
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	mf->mf_private = 0;
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	free_mntfs(mf);
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	/*
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	 * Free the dangling reference
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	 * to the mount link.
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	 */
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	free_mntfs(mf_link);
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	/*
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	 * Get a hold of the other entry
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	 */
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	mf_link->mf_flags &= ~MFF_RESTART;
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	/* Say what happened */
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	plog(XLOG_INFO, "restarting %s on %s", mf_link->mf_info, mf_link->mf_mount);
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	return mf_link;
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}
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static int
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ifs_mount(am_node *mp)
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{
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	mntfs *newmf = ifs_inherit(mp->am_mnt);
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	if (newmf) {
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		mp->am_mnt = newmf;
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		/*
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		 * XXX - must do the am_mounted call here
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		 */
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		if (newmf->mf_ops->fs_flags & FS_MBACKGROUND)
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			am_mounted(mp);
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		new_ttl(mp);
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		return 0;
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	}
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	return EINVAL;
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}
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static int
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ifs_fmount(mntfs *mf)
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{
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	am_node *mp = find_mf(mf);
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	if (mp)
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		return ifs_mount(mp);
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	return ifs_inherit(mf) ? 0 : EINVAL;
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}
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static int
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ifs_fumount(mntfs *mf)
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{
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	/*
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	 * Always succeed
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	 */
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	return 0;
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}
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/*
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 * Ops structure
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 */
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am_ops ifs_ops = {
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	"inherit",
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	ifs_match,
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	ifs_init,
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	ifs_mount,
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	ifs_fmount,
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	auto_fumount,
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	ifs_fumount,
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	efs_lookuppn,
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	efs_readdir,
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	0, /* ifs_readlink */
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	0, /* ifs_mounted */
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	0, /* ifs_umounted */
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	find_afs_srvr,
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	FS_DISCARD
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};
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#endif /* HAS_IFS */