1 /*- 2 * Copyright (c) 2003-2005 SPARTA, 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 #include "opt_posix.h" 37 38 #include <sys/param.h> 39 #include <sys/kernel.h> 40 #include <sys/ksem.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/systm.h> 44 #include <sys/sysctl.h> 45 46 #include <security/mac/mac_framework.h> 47 #include <security/mac/mac_internal.h> 48 #include <security/mac/mac_policy.h> 49 50 static struct label * 51 mac_posix_sem_label_alloc(void) 52 { 53 struct label *label; 54 55 label = mac_labelzone_alloc(M_WAITOK); 56 MAC_PERFORM(init_posix_sem_label, label); 57 return (label); 58 } 59 60 void 61 mac_init_posix_sem(struct ksem *ksemptr) 62 { 63 64 ksemptr->ks_label = mac_posix_sem_label_alloc(); 65 } 66 67 static void 68 mac_posix_sem_label_free(struct label *label) 69 { 70 71 MAC_PERFORM(destroy_posix_sem_label, label); 72 } 73 74 void 75 mac_destroy_posix_sem(struct ksem *ksemptr) 76 { 77 78 mac_posix_sem_label_free(ksemptr->ks_label); 79 ksemptr->ks_label = NULL; 80 } 81 82 void 83 mac_create_posix_sem(struct ucred *cred, struct ksem *ksemptr) 84 { 85 86 MAC_PERFORM(create_posix_sem, cred, ksemptr, ksemptr->ks_label); 87 } 88 89 int 90 mac_check_posix_sem_destroy(struct ucred *cred, struct ksem *ksemptr) 91 { 92 int error; 93 94 MAC_CHECK(check_posix_sem_destroy, cred, ksemptr, ksemptr->ks_label); 95 96 return (error); 97 } 98 99 int 100 mac_check_posix_sem_open(struct ucred *cred, struct ksem *ksemptr) 101 { 102 int error; 103 104 MAC_CHECK(check_posix_sem_open, cred, ksemptr, ksemptr->ks_label); 105 106 return (error); 107 } 108 109 int 110 mac_check_posix_sem_getvalue(struct ucred *cred, struct ksem *ksemptr) 111 { 112 int error; 113 114 MAC_CHECK(check_posix_sem_getvalue, cred, ksemptr, 115 ksemptr->ks_label); 116 117 return (error); 118 } 119 120 int 121 mac_check_posix_sem_post(struct ucred *cred, struct ksem *ksemptr) 122 { 123 int error; 124 125 MAC_CHECK(check_posix_sem_post, cred, ksemptr, ksemptr->ks_label); 126 127 return (error); 128 } 129 130 int 131 mac_check_posix_sem_unlink(struct ucred *cred, struct ksem *ksemptr) 132 { 133 int error; 134 135 MAC_CHECK(check_posix_sem_unlink, cred, ksemptr, ksemptr->ks_label); 136 137 return (error); 138 } 139 140 int 141 mac_check_posix_sem_wait(struct ucred *cred, struct ksem *ksemptr) 142 { 143 int error; 144 145 MAC_CHECK(check_posix_sem_wait, cred, ksemptr, ksemptr->ks_label); 146 147 return (error); 148 } 149