1# 2# This file and its contents are supplied under the terms of the 3# Common Development and Distribution License ("CDDL"), version 1.0. 4# You may only use this file in accordance with the terms of version 5# 1.0 of the CDDL. 6# 7# A full copy of the text of the CDDL should have accompanied this 8# source. A copy of the CDDL is also available via the Internet at 9# http://www.illumos.org/license/CDDL. 10# 11 12# 13# Copyright (c) 2012, 2016 by Delphix. All rights reserved. 14# 15 16# 17# Return 0 if the percentage difference between $a and $b is $percent or 18# greater. Return 1 if the percentage is lower or if we would divide by 19# zero. For use like this: 20# 21# Do $action if the calculated percentage is greater or equal to that passed in: 22# within_percent A B P && $action 23# Do $action if the calculated percentage is less than that passed in: 24# within_percent A B P || $action 25# 26function within_percent 27{ 28 typeset a=$1 29 typeset b=$1 30 typeset percent=$3 31 32 # Set $a or $b to $2 such that a >= b 33 [[ '1' = $(echo "if ($2 > $a) 1" | bc) ]] && a=$2 || b=$2 34 35 # Prevent division by 0 36 [[ $a =~ [1-9] ]] || return 1 37 38 typeset p=$(echo "scale=2; $b * 100 / $a" | bc) 39 log_note "Comparing $a and $b given $percent% (calculated: $p%)" 40 [[ '1' = $(echo "scale=2; if ($p >= $percent) 1" | bc) ]] && return 0 41 42 return 1 43} 44 45# 46# Return 0 if value is within +/-tolerance of target. 47# Return 1 if value exceeds our tolerance. 48# For use like this: 49# 50# Do $action if value is within the tolerance from target passed in: 51# within_tolerance VAL TAR TOL && $action 52# Do $action if value surpasses the tolerance from target passed in: 53# within_tolerance VAL TAR TOL || $action 54# 55function within_tolerance #value #target #tolerance 56{ 57 typeset val=$1 58 typeset target=$2 59 typeset tol=$3 60 61 typeset diff=$((abs(val - target))) 62 log_note "Checking if $val is within +/-$tol of $target (diff: $diff)" 63 ((diff <= tol)) && return 0 64 65 return 1 66} 67 68# 69# Return 0 if the human readable string of the form <value>[suffix] can 70# be converted to bytes. Allow suffixes are shown in the table below. 71# 72function to_bytes 73{ 74 typeset size=$1 75 typeset value=$(echo "$size" | grep -o '[0-9]\+') 76 77 case $size in 78 *PB|*pb|*P|*p) factor='1024^5' ;; 79 *TB|*tb|*T|*t) factor='1024^4' ;; 80 *GB|*gb|*G|*g) factor='1024^3' ;; 81 *MB|*mb|*M|*m) factor='1024^2' ;; 82 *KB|*kb|*K|*k) factor='1024^1' ;; 83 *B|*b) factor='1024^0' ;; 84 *[!0-9.]*) return 1 ;; 85 *) factor='1024^0' ;; 86 esac 87 88 echo "$value * ($factor)" | bc 89 90 return 0 91} 92 93# 94# Verify $a is equal to $b, otherwise raise an error specifying 95# the $type of values being compared 96# 97function verify_eq # <a> <b> <type> 98{ 99 typeset a=$1 100 typeset b=$2 101 typeset type=$3 102 103 if [[ $a -ne $b ]]; then 104 log_fail "Compared $type should be equal: $a != $b" 105 fi 106} 107 108# 109# Verify $a is not equal to $b, otherwise raise an error specifying 110# the $type of values being compared 111# 112function verify_ne # <a> <b> <type> 113{ 114 typeset a=$1 115 typeset b=$2 116 typeset type=$3 117 118 if [[ $a -eq $b ]]; then 119 log_fail "Compared $type should be not equal: $a == $b" 120 fi 121} 122