1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <stdlib.h>
28 #include <errno.h>
29 #include <tsol/label.h>
30 #include <bsm/devices.h>
31
32
33 /*
34 * getdevicerange
35 * Gets the minimum and maximum labels within which the device can
36 * be used. If label range is not specified for the device in
37 * device_allocate, defaults to admin_low and admin_high.
38 * Returns malloc'ed blrange pointer, or NULL on any error.
39 */
40 blrange_t *
getdevicerange(const char * dev)41 getdevicerange(const char *dev)
42 {
43 int err;
44 char *lstr;
45 devalloc_t *da;
46 devmap_t *dm;
47 blrange_t *range;
48
49 errno = 0;
50 if ((range = malloc(sizeof (blrange_t))) == NULL)
51 return (NULL);
52 if ((range->lower_bound = blabel_alloc()) == NULL) {
53 free(range);
54 return (NULL);
55 }
56 if ((range->upper_bound = blabel_alloc()) == NULL) {
57 blabel_free(range->lower_bound);
58 free(range);
59 return (NULL);
60 }
61
62 /*
63 * If an entry is found for the named device,
64 * return its label range.
65 */
66 setdaent();
67 if ((da = getdanam((char *)dev)) == NULL) {
68 setdmapent();
69 /* check for an actual device file */
70 if ((dm = getdmapdev((char *)dev)) != NULL) {
71 da = getdanam(dm->dmap_devname);
72 freedmapent(dm);
73 }
74 enddmapent();
75 }
76 enddaent();
77 if (da == NULL) {
78 bsllow(range->lower_bound);
79 bslhigh(range->upper_bound);
80 } else {
81 lstr = kva_match(da->da_devopts, DAOPT_MINLABEL);
82 if (lstr == NULL) {
83 bsllow(range->lower_bound);
84 } else if (stobsl(lstr, range->lower_bound, NO_CORRECTION,
85 &err) == 0) {
86 blabel_free(range->lower_bound);
87 blabel_free(range->upper_bound);
88 free(range);
89 errno = ENOTSUP;
90 return (NULL);
91 }
92 lstr = kva_match(da->da_devopts, DAOPT_MAXLABEL);
93 if (lstr == NULL) {
94 bslhigh(range->upper_bound);
95 } else if (stobsl(lstr, range->upper_bound, NO_CORRECTION,
96 &err) == 0) {
97 blabel_free(range->lower_bound);
98 blabel_free(range->upper_bound);
99 free(range);
100 errno = ENOTSUP;
101 return (NULL);
102 }
103 freedaent(da);
104 }
105
106 return (range);
107 }
108