mac_posix_sem.c revision 172850 
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: head/sys/security/mac/mac_posix_sem.c 172850 2007-10-21 11:11:07Z rwatson $");
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
50static struct label *
51mac_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
60void
61mac_init_posix_sem(struct ksem *ks)
62{
63
64	ks->ks_label = mac_posix_sem_label_alloc();
65}
66
67static void
68mac_posix_sem_label_free(struct label *label)
69{
70
71	MAC_PERFORM(destroy_posix_sem_label, label);
72}
73
74void
75mac_destroy_posix_sem(struct ksem *ks)
76{
77
78	mac_posix_sem_label_free(ks->ks_label);
79	ks->ks_label = NULL;
80}
81
82void
83mac_create_posix_sem(struct ucred *cred, struct ksem *ks)
84{
85
86	MAC_PERFORM(create_posix_sem, cred, ks, ks->ks_label);
87}
88
89int
90mac_check_posix_sem_destroy(struct ucred *cred, struct ksem *ks)
91{
92	int error;
93
94	MAC_CHECK(check_posix_sem_destroy, cred, ks, ks->ks_label);
95
96	return (error);
97}
98
99int
100mac_check_posix_sem_open(struct ucred *cred, struct ksem *ks)
101{
102	int error;
103
104	MAC_CHECK(check_posix_sem_open, cred, ks, ks->ks_label);
105
106	return (error);
107}
108
109int
110mac_check_posix_sem_getvalue(struct ucred *cred, struct ksem *ks)
111{
112	int error;
113
114	MAC_CHECK(check_posix_sem_getvalue, cred, ks, ks->ks_label);
115
116	return (error);
117}
118
119int
120mac_check_posix_sem_post(struct ucred *cred, struct ksem *ks)
121{
122	int error;
123
124	MAC_CHECK(check_posix_sem_post, cred, ks, ks->ks_label);
125
126	return (error);
127}
128
129int
130mac_check_posix_sem_unlink(struct ucred *cred, struct ksem *ks)
131{
132	int error;
133
134	MAC_CHECK(check_posix_sem_unlink, cred, ks, ks->ks_label);
135
136	return (error);
137}
138
139int
140mac_check_posix_sem_wait(struct ucred *cred, struct ksem *ks)
141{
142	int error;
143
144	MAC_CHECK(check_posix_sem_wait, cred, ks, ks->ks_label);
145
146	return (error);
147}
148