#!/bin/ksh
#
# Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
#
#       Dump the same holey file using both xfs_bmap and 
#       dump_allocinfo (a C wrapper for get_allocinfo).
#	Run awk on the xfs_bmap output, since xfs_bmap
#       gives specific block allocation info that get_allocinfo
#       does not.  Then diff the two outputs.

if [[ $# != 2 ]]
then	print "USAGE:  ${0##*/} bindir testdir"
	exit 1
fi

# Check bindir for needed programs.
if [[ ! ( -r "$1/wf" ) ]]
then print "Aborting: necessary program wf is not in $1/."
     if [[ ! ( -r "$1/dump_allocinfo" ) ]]
     then print "          necessary program dump_allocinfo is also missing."
     fi
     exit 1
fi
if [[ ! ( -r "$1/dump_allocinfo" ) ]]
then print "Aborting: necessary program dump_allocinfo is not in $1/."
     exit 1
fi

print "Comparison test (get_allocinfo vs. xfs_bmap) beginning..."

typeset -i offset
typeset -i length
typeset -i count

RANDOM=$SECONDS
offset=0
length=$RANDOM
count=100
filename=DMAPI_test_allocinfo

# Create a random holey file
while (( count > 0 ))
do 
	$1/wf -l $length -L $offset -b 512 $2/$filename > /dev/null
	(( offset = RANDOM * 512 + offset + length )) 
	(( length = RANDOM ))
	(( count = count - 1 ))
done

# Get output from xfs_bmap
xfs_bmap $2/DMAPI_test_allocinfo > $2/$filename.xfs

# Get output from dump_allocinfo (DMAPI)
$1/dump_allocinfo $2/DMAPI_test_allocinfo > $2/$filename.da
	
# Alter xfs_bmap ouput to match get_allocinfo
awk '{ if (NR > 1)
	if ($3 == "hole") 
		print $1, $2, $3
 	else
		print $1, $2, "resv"
}' $2/DMAPI_test_allocinfo.xfs > $2/$filename.ok

# Compare the ouput
diff -w $2/$filename.ok $2/$filename.da

# Remove the test file
rm $2/$filename*

print "Test complete."