mac_posix_sem.c revision 174718 
1/*-
2 * Copyright (c) 2003-2006 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 * This software was enhanced by SPARTA ISSO under SPAWAR contract
11 * N66001-04-C-6019 ("SEFOS").
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/sys/security/mac/mac_posix_sem.c 174718 2007-12-17 17:26:32Z rwatson $");
37
38#include "opt_mac.h"
39#include "opt_posix.h"
40
41#include <sys/param.h>
42#include <sys/kernel.h>
43#include <sys/ksem.h>
44#include <sys/malloc.h>
45#include <sys/module.h>
46#include <sys/systm.h>
47#include <sys/sysctl.h>
48
49#include <security/mac/mac_framework.h>
50#include <security/mac/mac_internal.h>
51#include <security/mac/mac_policy.h>
52
53static struct label *
54mac_posixsem_label_alloc(void)
55{
56	struct label *label;
57
58	label = mac_labelzone_alloc(M_WAITOK);
59	MAC_PERFORM(posixsem_init_label, label);
60	return (label);
61}
62
63void
64mac_posixsem_init(struct ksem *ks)
65{
66
67	ks->ks_label = mac_posixsem_label_alloc();
68}
69
70static void
71mac_posixsem_label_free(struct label *label)
72{
73
74	MAC_PERFORM(posixsem_destroy_label, label);
75	mac_labelzone_free(label);
76}
77
78void
79mac_posixsem_destroy(struct ksem *ks)
80{
81
82	mac_posixsem_label_free(ks->ks_label);
83	ks->ks_label = NULL;
84}
85
86void
87mac_posixsem_create(struct ucred *cred, struct ksem *ks)
88{
89
90	MAC_PERFORM(posixsem_create, cred, ks, ks->ks_label);
91}
92
93int
94mac_posixsem_check_destroy(struct ucred *cred, struct ksem *ks)
95{
96	int error;
97
98	MAC_CHECK(posixsem_check_destroy, cred, ks, ks->ks_label);
99
100	return (error);
101}
102
103int
104mac_posixsem_check_open(struct ucred *cred, struct ksem *ks)
105{
106	int error;
107
108	MAC_CHECK(posixsem_check_open, cred, ks, ks->ks_label);
109
110	return (error);
111}
112
113int
114mac_posixsem_check_getvalue(struct ucred *cred, struct ksem *ks)
115{
116	int error;
117
118	MAC_CHECK(posixsem_check_getvalue, cred, ks, ks->ks_label);
119
120	return (error);
121}
122
123int
124mac_posixsem_check_post(struct ucred *cred, struct ksem *ks)
125{
126	int error;
127
128	MAC_CHECK(posixsem_check_post, cred, ks, ks->ks_label);
129
130	return (error);
131}
132
133int
134mac_posixsem_check_unlink(struct ucred *cred, struct ksem *ks)
135{
136	int error;
137
138	MAC_CHECK(posixsem_check_unlink, cred, ks, ks->ks_label);
139
140	return (error);
141}
142
143int
144mac_posixsem_check_wait(struct ucred *cred, struct ksem *ks)
145{
146	int error;
147
148	MAC_CHECK(posixsem_check_wait, cred, ks, ks->ks_label);
149
150	return (error);
151}
152