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 * 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