107 lines
4.3 KiB
C
107 lines
4.3 KiB
C
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/*-
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* Copyright (c) 2001 Networks Associates Technology, Inc.
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $Id: lomacfs.h,v 1.20 2001/10/17 15:34:29 bfeldman Exp $
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*/
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#ifndef LOMACFS_H
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#define LOMACFS_H
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include "kernel_interface.h"
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struct lomac_mount {
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struct vnode *lm_rootvp; /* singly-ref'd root after mount() */
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#define LM_TOOKROOT 0x0001
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unsigned int lm_flags;
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};
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/*
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* This is the structure associated with v_data on all LOMACFS vnodes.
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*/
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struct lomac_node {
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struct vnode *ln_vp; /* vnode back-pointer */
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struct vnode *ln_lowervp; /* shadowed vnode (ref'd or NULL) */
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#define LN_LEVEL_MASK 0x0003
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#define LN_LOWEST_LEVEL 0x0001
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#define LN_SUBJ_LEVEL 0x0002 /* placeholder before inheriting */
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#define LN_HIGHEST_LEVEL 0x0003
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#define LN_INHERIT_MASK 0x001c
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#define LN_INHERIT_LOW 0x0004 /* children start with a low level */
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#define LN_INHERIT_HIGH 0x0008 /* children start with a high level */
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#define LN_INHERIT_SUBJ 0x0010 /* children inherit subject's level */
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#define LN_ATTR_MASK 0x01e0
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#define LN_ATTR_LOWWRITE 0x0020 /* lower levels may write to */
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#define LN_ATTR_LOWNOOPEN 0x0040 /* lower levels may not open */
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#define LN_ATTR_NONETDEMOTE 0x0080 /* will not demote on net read */
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#define LN_ATTR_NODEMOTE 0x0100 /* subject won't demote on other read */
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u_int ln_flags;
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/* What's the last node explicitly specifying policy for this? */
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struct lomac_node_entry *ln_underpolicy;
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/* If non-NULL, this corresponds 1:1 to a specific PLM node entry. */
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struct lomac_node_entry *ln_entry;
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#if defined(LOMAC_DEBUG_INCNAME)
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char ln_name[MAXPATHLEN]; /* final component name */
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#endif
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};
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/*
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* This is the "placeholder" structure initialized from the PLM that
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* holds the level information for all named objects.
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*/
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struct lomac_node_entry {
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SLIST_HEAD(lomac_node_entry_head, lomac_node_entry) ln_children;
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SLIST_ENTRY(lomac_node_entry) ln_chain; /* chain of current level */
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/* continuing with the LN_* flags above */
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#define LN_CHILD_ATTR_SHIFT 4 /* lshift from attr -> child attr */
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#define LN_CHILD_ATTR_MASK 0x1e00
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#define LN_CHILD_ATTR_LOWWRITE 0x0200 /* lower levels may write to */
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#define LN_CHILD_ATTR_LOWNOOPEN 0x0400 /* lower levels may not open */
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#define LN_CHILD_ATTR_NONETDEMOTE 0x0800 /* will not demote on net read */
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#define LN_CHILD_ATTR_NODEMOTE 0x1000 /* subject won't demote on other read */
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u_int ln_flags;
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char *ln_name; /* last component name (to search) */
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const char *ln_path; /* in "stable" storage */
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};
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#define VTOLOMAC(vp) ((struct lomac_node *)(vp)->v_data)
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#define VTOLVP(vp) VTOLOMAC(vp)->ln_lowervp
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#define VFSTOLOMAC(mp) ((struct lomac_mount *)mp->mnt_data)
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#define VISLOMAC(vp) (vp->v_op == lomacfs_vnodeop_p)
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int lomacfs_node_alloc(struct mount *mp, struct componentname *cnp,
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struct vnode *dvp, struct vnode *lowervp, struct vnode **vpp);
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MALLOC_DECLARE(M_LOMACFS);
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extern vop_t **lomacfs_vnodeop_p;
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extern struct lomac_node_entry lomac_node_entry_root;
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#endif /* LOMACFS_H */
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