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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26#include <errno.h> 27#include <libgen.h> 28#include <libintl.h> 29#include <stdio.h> 30#include <stdlib.h> 31#include <strings.h> 32#include <ctype.h> 33 34#include "zpool_util.h" 35 36/* 37 * Utility function to guarantee malloc() success. 38 */ 39void * 40safe_malloc(size_t size) 41{ 42 void *data; 43 44 if ((data = calloc(1, size)) == NULL) { 45 (void) fprintf(stderr, "internal error: out of memory\n"); 46 exit(1); 47 } 48 49 return (data); 50} 51 52/* 53 * Display an out of memory error message and abort the current program. 54 */ 55void 56zpool_no_memory(void) 57{ 58 assert(errno == ENOMEM); 59 (void) fprintf(stderr, 60 gettext("internal error: out of memory\n")); 61 exit(1); 62} 63 64/* 65 * Return the number of logs in supplied nvlist 66 */ 67uint_t 68num_logs(nvlist_t *nv) 69{ 70 uint_t nlogs = 0; 71 uint_t c, children; 72 nvlist_t **child; 73 74 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 75 &child, &children) != 0) 76 return (0); 77 78 for (c = 0; c < children; c++) { 79 uint64_t is_log = B_FALSE; 80 81 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG, 82 &is_log); 83 if (is_log) 84 nlogs++; 85 } 86 return (nlogs); 87} 88 89/* Find the max element in an array of uint64_t values */ 90uint64_t 91array64_max(uint64_t array[], unsigned int len) 92{ 93 uint64_t max = 0; 94 int i; 95 for (i = 0; i < len; i++) 96 max = MAX(max, array[i]); 97 98 return (max); 99} 100 101/* 102 * Find highest one bit set. 103 * Returns bit number + 1 of highest bit that is set, otherwise returns 0. 104 */ 105int 106highbit64(uint64_t i) 107{ 108 if (i == 0) 109 return (0); 110 111 return (NBBY * sizeof (uint64_t) - __builtin_clzll(i)); 112} 113 114/* 115 * Find lowest one bit set. 116 * Returns bit number + 1 of lowest bit that is set, otherwise returns 0. 117 */ 118int 119lowbit64(uint64_t i) 120{ 121 if (i == 0) 122 return (0); 123 124 return (__builtin_ffsll(i)); 125} 126