1/*- 2 * Copyright (c) 2004 Networks Associates Technology, Inc. 3 * Copyright (c) 2005 SPARTA, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project in part by Network 7 * Associates Laboratories, the Security Research Division of Network 8 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 9 * as part of the DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <kern/zalloc.h> 34#include <security/_label.h> 35#include <sys/param.h> 36#include <sys/queue.h> 37#include <sys/systm.h> 38#include <security/mac_internal.h> 39 40static zone_t zone_label; 41 42void 43mac_labelzone_init(void) 44{ 45 46 zone_label = zinit(sizeof(struct label), 47 8192 * sizeof(struct label), 48 sizeof(struct label), "MAC Labels"); 49 zone_change(zone_label, Z_EXPAND, TRUE); 50 zone_change(zone_label, Z_EXHAUST, FALSE); 51 zone_change(zone_label, Z_CALLERACCT, FALSE); 52} 53 54struct label * 55mac_labelzone_alloc(int flags) 56{ 57 struct label *l; 58 59 if (flags & MAC_NOWAIT) 60 l = (struct label *) zalloc_noblock(zone_label); 61 else 62 l = (struct label *) zalloc(zone_label); 63 if (l == NULL) 64 return (NULL); 65 66 bzero(l, sizeof(struct label)); 67 l->l_flags = MAC_FLAG_INITIALIZED; 68 return (l); 69} 70 71void 72mac_labelzone_free(struct label *l) 73{ 74 75 if (l == NULL) 76 panic("Free of NULL MAC label\n"); 77 78 if ((l->l_flags & MAC_FLAG_INITIALIZED) == 0) 79 panic("Free of uninitialized label\n"); 80 bzero(l, sizeof(struct label)); 81 zfree(zone_label, l); 82} 83 84/* 85 * Functions used by policy modules to get and set label values. 86 */ 87intptr_t 88mac_label_get(struct label *l, int slot) 89{ 90 KASSERT(l != NULL, ("mac_label_get: NULL label")); 91 92 return ((intptr_t) (l->l_perpolicy[slot].l_ptr)); 93} 94 95void 96mac_label_set(struct label *l, int slot, intptr_t v) 97{ 98 KASSERT(l != NULL, ("mac_label_set: NULL label")); 99 100 l->l_perpolicy[slot].l_ptr = (void *) v; 101} 102 103