1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <errno.h>
28 #include <libgen.h>
29 #include <libintl.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <ctype.h>
34
35 #include "zpool_util.h"
36
37 /*
38 * Utility function to guarantee malloc() success.
39 */
40 void *
safe_malloc(size_t size)41 safe_malloc(size_t size)
42 {
43 void *data;
44
45 if ((data = calloc(1, size)) == NULL) {
46 (void) fprintf(stderr, "internal error: out of memory\n");
47 exit(1);
48 }
49
50 return (data);
51 }
52
53 /*
54 * Utility function to guarantee realloc() success.
55 */
56 void *
safe_realloc(void * from,size_t size)57 safe_realloc(void *from, size_t size)
58 {
59 void *data;
60
61 if ((data = realloc(from, size)) == NULL) {
62 (void) fprintf(stderr, "internal error: out of memory\n");
63 exit(1);
64 }
65
66 return (data);
67 }
68
69 /*
70 * Display an out of memory error message and abort the current program.
71 */
72 void
zpool_no_memory(void)73 zpool_no_memory(void)
74 {
75 assert(errno == ENOMEM);
76 (void) fprintf(stderr,
77 gettext("internal error: out of memory\n"));
78 exit(1);
79 }
80
81 /*
82 * Return the number of logs in supplied nvlist
83 */
84 uint_t
num_logs(nvlist_t * nv)85 num_logs(nvlist_t *nv)
86 {
87 uint_t nlogs = 0;
88 uint_t c, children;
89 nvlist_t **child;
90
91 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
92 &child, &children) != 0)
93 return (0);
94
95 for (c = 0; c < children; c++) {
96 uint64_t is_log = B_FALSE;
97
98 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
99 &is_log);
100 if (is_log)
101 nlogs++;
102 }
103 return (nlogs);
104 }
105
106 /* Find the max element in an array of uint64_t values */
107 uint64_t
array64_max(uint64_t array[],unsigned int len)108 array64_max(uint64_t array[], unsigned int len)
109 {
110 uint64_t max = 0;
111 int i;
112 for (i = 0; i < len; i++)
113 max = MAX(max, array[i]);
114
115 return (max);
116 }
117
118 /*
119 * Find highest one bit set.
120 * Returns bit number + 1 of highest bit that is set, otherwise returns 0.
121 */
122 int
highbit64(uint64_t i)123 highbit64(uint64_t i)
124 {
125 if (i == 0)
126 return (0);
127
128 return (NBBY * sizeof (uint64_t) - __builtin_clzll(i));
129 }
130
131 /*
132 * Find lowest one bit set.
133 * Returns bit number + 1 of lowest bit that is set, otherwise returns 0.
134 */
135 int
lowbit64(uint64_t i)136 lowbit64(uint64_t i)
137 {
138 if (i == 0)
139 return (0);
140
141 return (__builtin_ffsll(i));
142 }
143