Current Path : /sys/security/mac/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/security/mac/mac_label.c |
/*- * Copyright (c) 2003-2004 Networks Associates Technology, Inc. * Copyright (c) 2007 Robert N. M. Watson * All rights reserved. * * This software was developed for the FreeBSD Project in part by Network * Associates Laboratories, 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. * * 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. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/security/mac/mac_label.c 166533 2007-02-06 14:19:25Z rwatson $"); #include "opt_mac.h" #include <sys/param.h> #include <sys/module.h> #include <sys/sysctl.h> #include <sys/systm.h> #include <vm/uma.h> #include <security/mac/mac_framework.h> #include <security/mac/mac_internal.h> #include <security/mac/mac_policy.h> /* * zone_label is the UMA zone from which most labels are allocated. Label * structures are initialized to zero bytes so that policies see a NULL/0 * slot on first use, even if the policy is loaded after the label is * allocated for an object. */ static uma_zone_t zone_label; static int mac_labelzone_ctor(void *mem, int size, void *arg, int flags); static void mac_labelzone_dtor(void *mem, int size, void *arg); void mac_labelzone_init(void) { zone_label = uma_zcreate("MAC labels", sizeof(struct label), mac_labelzone_ctor, mac_labelzone_dtor, NULL, NULL, UMA_ALIGN_PTR, 0); } /* * mac_init_label() and mac_destroy_label() are exported so that they can be * used in mbuf tag initialization, where labels are not slab allocated from * the zone_label zone. */ void mac_init_label(struct label *label) { bzero(label, sizeof(*label)); label->l_flags = MAC_FLAG_INITIALIZED; } void mac_destroy_label(struct label *label) { KASSERT(label->l_flags & MAC_FLAG_INITIALIZED, ("destroying uninitialized label")); #ifdef DIAGNOSTIC bzero(label, sizeof(*label)); #else label->l_flags &= ~MAC_FLAG_INITIALIZED; #endif } static int mac_labelzone_ctor(void *mem, int size, void *arg, int flags) { struct label *label; KASSERT(size == sizeof(*label), ("mac_labelzone_ctor: wrong size\n")); label = mem; mac_init_label(label); return (0); } static void mac_labelzone_dtor(void *mem, int size, void *arg) { struct label *label; KASSERT(size == sizeof(*label), ("mac_labelzone_dtor: wrong size\n")); label = mem; mac_destroy_label(label); } struct label * mac_labelzone_alloc(int flags) { return (uma_zalloc(zone_label, flags)); } void mac_labelzone_free(struct label *label) { uma_zfree(zone_label, label); } /* * Functions used by policy modules to get and set label values. */ intptr_t mac_label_get(struct label *l, int slot) { KASSERT(l != NULL, ("mac_label_get: NULL label")); return (l->l_perpolicy[slot]); } void mac_label_set(struct label *l, int slot, intptr_t v) { KASSERT(l != NULL, ("mac_label_set: NULL label")); l->l_perpolicy[slot] = v; }