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/*-
* Copyright (c) 2001 Networks Associates Technologies, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by NAI Labs, the
* Security Research Division of Network Associates, Inc. under
* DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
* CHATS research program.
*
* 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.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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
* SUCH DAMAGE.
*
* $Id$
* $FreeBSD$
*/
#ifndef LOMACFS_H
#define LOMACFS_H
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include "kernel_interface.h"
struct lomac_mount {
struct vnode *lm_rootvp; /* singly-ref'd root after mount() */
#define LM_TOOKROOT 0x0001
unsigned int lm_flags;
};
/*
* This is the structure associated with v_data on all LOMACFS vnodes.
*/
struct lomac_node {
struct vnode *ln_vp; /* vnode back-pointer */
struct vnode *ln_lowervp; /* shadowed vnode (ref'd or NULL) */
#define LN_LEVEL_MASK 0x0003
#define LN_LOWEST_LEVEL 0x0001
#define LN_SUBJ_LEVEL 0x0002 /* placeholder before inheriting */
#define LN_HIGHEST_LEVEL 0x0003
#define LN_INHERIT_MASK 0x001c
#define LN_INHERIT_LOW 0x0004 /* children start with a low level */
#define LN_INHERIT_HIGH 0x0008 /* children start with a high level */
#define LN_INHERIT_SUBJ 0x0010 /* children inherit subject's level */
#define LN_ATTR_MASK 0x01e0
#define LN_ATTR_LOWWRITE 0x0020 /* lower levels may write to */
#define LN_ATTR_LOWNOOPEN 0x0040 /* lower levels may not open */
#define LN_ATTR_NONETDEMOTE 0x0080 /* will not demote on net read */
#define LN_ATTR_NODEMOTE 0x0100 /* subject won't demote on other read */
u_int ln_flags;
/* What's the last node explicitly specifying policy for this? */
struct lomac_node_entry *ln_underpolicy;
/* If non-NULL, this corresponds 1:1 to a specific PLM node entry. */
struct lomac_node_entry *ln_entry;
#if defined(LOMAC_DEBUG_INCNAME)
char ln_name[MAXPATHLEN]; /* final component name */
#endif
};
/*
* This is the "placeholder" structure initialized from the PLM that
* holds the level information for all named objects.
*/
struct lomac_node_entry {
SLIST_HEAD(lomac_node_entry_head, lomac_node_entry) ln_children;
SLIST_ENTRY(lomac_node_entry) ln_chain; /* chain of current level */
/* continuing with the LN_* flags above */
#define LN_CHILD_ATTR_SHIFT 4 /* lshift from attr -> child attr */
#define LN_CHILD_ATTR_MASK 0x1e00
#define LN_CHILD_ATTR_LOWWRITE 0x0200 /* lower levels may write to */
#define LN_CHILD_ATTR_LOWNOOPEN 0x0400 /* lower levels may not open */
#define LN_CHILD_ATTR_NONETDEMOTE 0x0800 /* will not demote on net read */
#define LN_CHILD_ATTR_NODEMOTE 0x1000 /* subject won't demote on other read */
u_int ln_flags;
char *ln_name; /* last component name (to search) */
const char *ln_path; /* in "stable" storage */
};
#define VTOLOMAC(vp) ((struct lomac_node *)(vp)->v_data)
#define VTOLVP(vp) VTOLOMAC(vp)->ln_lowervp
#define VFSTOLOMAC(mp) ((struct lomac_mount *)mp->mnt_data)
#define VISLOMAC(vp) (vp->v_op == lomacfs_vnodeop_p)
int lomacfs_node_alloc(struct mount *mp, struct componentname *cnp,
struct vnode *dvp, struct vnode *lowervp, struct vnode **vpp);
MALLOC_DECLARE(M_LOMACFS);
extern vop_t **lomacfs_vnodeop_p;
extern struct lomac_node_entry lomac_node_entry_root;
#endif /* LOMACFS_H */
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