mac_sysv_sem.c revision 165433 
1/*-
2 * Copyright (c) 2003-2004 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: head/sys/security/mac/mac_sysv_sem.c 165433 2006-12-21 09:51:34Z rwatson $");
34
35#include "opt_mac.h"
36
37#include <sys/param.h>
38#include <sys/kernel.h>
39#include <sys/lock.h>
40#include <sys/malloc.h>
41#include <sys/mutex.h>
42#include <sys/mac.h>
43#include <sys/sbuf.h>
44#include <sys/systm.h>
45#include <sys/vnode.h>
46#include <sys/mount.h>
47#include <sys/file.h>
48#include <sys/namei.h>
49#include <sys/sysctl.h>
50#include <sys/sem.h>
51
52#include <sys/mac_policy.h>
53
54#include <security/mac/mac_framework.h>
55#include <security/mac/mac_internal.h>
56
57static struct label *
58mac_sysv_sem_label_alloc(void)
59{
60	struct label *label;
61
62	label = mac_labelzone_alloc(M_WAITOK);
63	MAC_PERFORM(init_sysv_sem_label, label);
64	return (label);
65}
66
67void
68mac_init_sysv_sem(struct semid_kernel *semakptr)
69{
70
71	semakptr->label = mac_sysv_sem_label_alloc();
72}
73
74static void
75mac_sysv_sem_label_free(struct label *label)
76{
77
78	MAC_PERFORM(destroy_sysv_sem_label, label);
79	mac_labelzone_free(label);
80}
81
82void
83mac_destroy_sysv_sem(struct semid_kernel *semakptr)
84{
85
86	mac_sysv_sem_label_free(semakptr->label);
87	semakptr->label = NULL;
88}
89
90void
91mac_create_sysv_sem(struct ucred *cred, struct semid_kernel *semakptr)
92{
93
94	MAC_PERFORM(create_sysv_sem, cred, semakptr, semakptr->label);
95}
96
97void
98mac_cleanup_sysv_sem(struct semid_kernel *semakptr)
99{
100
101	MAC_PERFORM(cleanup_sysv_sem, semakptr->label);
102}
103
104int
105mac_check_sysv_semctl(struct ucred *cred, struct semid_kernel *semakptr,
106    int cmd)
107{
108	int error;
109
110	MAC_CHECK(check_sysv_semctl, cred, semakptr, semakptr->label, cmd);
111
112	return(error);
113}
114
115int
116mac_check_sysv_semget(struct ucred *cred, struct semid_kernel *semakptr)
117{
118	int error;
119
120	MAC_CHECK(check_sysv_semget, cred, semakptr, semakptr->label);
121
122	return(error);
123}
124
125int
126mac_check_sysv_semop(struct ucred *cred, struct semid_kernel *semakptr,
127    size_t accesstype)
128{
129	int error;
130
131	MAC_CHECK(check_sysv_semop, cred, semakptr, semakptr->label,
132	    accesstype);
133
134	return(error);
135}
136