1 /*- 2 * Copyright (c) 2003 Networks Associates Technology, Inc. 3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project in part by Network 6 * Associates Laboratories, the Security Research Division of Network 7 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 8 * as part of the DARPA CHATS research program. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_mac.h" 36 37 #include <sys/param.h> 38 #include <sys/mac.h> 39 #include <sys/sysctl.h> 40 #include <sys/systm.h> 41 42 #include <vm/uma.h> 43 44 #include <security/mac/mac_internal.h> 45 46 uma_zone_t zone_label; 47 48 static int mac_labelzone_ctor(void *mem, int size, void *arg, int flags); 49 static void mac_labelzone_dtor(void *mem, int size, void *arg); 50 51 void 52 mac_labelzone_init(void) 53 { 54 55 zone_label = uma_zcreate("MAC labels", sizeof(struct label), 56 mac_labelzone_ctor, mac_labelzone_dtor, NULL, NULL, 57 UMA_ALIGN_PTR, 0); 58 } 59 60 static int 61 mac_labelzone_ctor(void *mem, int size, void *arg, int flags) 62 { 63 struct label *label; 64 65 KASSERT(size == sizeof(*label), ("mac_labelzone_ctor: wrong size\n")); 66 label = mem; 67 bzero(label, sizeof(*label)); 68 label->l_flags = MAC_FLAG_INITIALIZED; 69 return (0); 70 } 71 72 static void 73 mac_labelzone_dtor(void *mem, int size, void *arg) 74 { 75 struct label *label; 76 77 KASSERT(size == sizeof(*label), ("mac_labelzone_dtor: wrong size\n")); 78 label = mem; 79 #ifdef DIAGNOSTIC 80 bzero(label, sizeof(*label)); 81 #else 82 label->l_flags &= ~MAC_FLAG_INITIALIZED; 83 #endif 84 } 85 86 struct label * 87 mac_labelzone_alloc(int flags) 88 { 89 90 return (uma_zalloc(zone_label, flags)); 91 } 92 93 void 94 mac_labelzone_free(struct label *label) 95 { 96 97 uma_zfree(zone_label, label); 98 } 99