#! /bin/sh
#
#   Copyright (c) International Business Machines  Corp., 2005
#
#   This program is free software;  you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY;  without even the implie; warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
#   the GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program;  if not, write to the Free Software
#   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
#
#
#  FILE   : fs_di
#
#  PURPOSE: FileSystem Data Integrity
#	   1. Creates a data file of specified or random size and copies
#         the file to a random directory depth on a specified filesystem
#	      The two files are compared and checked for differences.
#	      If the files differ, then the test fails. By default, this
#	      test creates a 30Mb file and runs for ten loops.
#      2. Creates a datafile of size half of the partition size. Creates
#         two fragmented files on the specified partition and copies datafile
#         to them. Then compares both the fragmented files with datafile. If
#         files differ, then test fails.
#
#  SETUP: None
#
#
#  HISTORY:
#    28/07/09 Jyoti Vantagodi (jyotiv@linux.vnet.ibm.com)
#             Added point two of above PURPOSE
#    04/11/05 Robbie Williamson (robbiew@us.ibm.com)
#      -Written
#
#***********************************************************************

#Uncomment line below for debug output.
#trace_logic=${trace_logic:-"set -x"}

$trace_logic

#-----------------------------------------------------------------------
# Initialize local variables
#-----------------------------------------------------------------------
TC=${TC:=fs_di}
TCbin=${TCbin:=`pwd`}
TCtmp=${TCtmp:=$TMPDIR/$TC$$}
export PATH=$PATH:$TCbin:../../../bin
export TCID=$TC
export TST_TOTAL=1
export TST_COUNT=1

# If CLEANUP is not set; set it to "ON"
CLEANUP=${CLEANUP:="ON"}
usage()
{
    cat <<-EOF >&2

    usage: ./${0##*/} -d TMPDIR [-h] [-l # of LOOPS ] [-s SIZE in Mb][-S partition SIZE in Mb]

    -d TMPDIR       Directory where temporary files will be created.
    -h              Help. Prints all available options.
    -l # of LOOPS   The number of times to run the test. Default=10.
    -s SIZE in Mb   The size of the data file to create. Default=30Mb. A "0" means random sizes from 10-500Mb.
    -S SIZE in Mb   Size of usable partition (in MBs) on which the testing is carried out (needs to be passed
                    for fragmented file test)
    -v              Verbose output.
    example: ./${0##*/} -d /mnt/cifsmount -l 20 -s 100 -S 200
    example: ./${0##*/} -d /mnt/cifsmount -l 20 -s 100

	EOF
exit 0
}

#=============================================================================
# FUNCTION NAME:        end_testcase
#
# FUNCTION DESCRIPTION: Clean up
#
# PARAMETERS:   	None.
#
# RETURNS:      	None.
#=============================================================================
end_testcase()
{
$trace_logic
    if [ "$CLEANUP" = "ON" ]; then
	rm -rf $TCtmp
	rm -rf ${TESTFS}
        rm -f $TCtmp/testfile*
    fi

    [ $# = 0 ] && { tst_resm TPASS "Test Successful"; exit 0; }
    tst_resm TFAIL "Test Failed: $@"
    exit 1
}

#=============================================================================
# FUNCTION NAME:        setup_testcase
#
# FUNCTION DESCRIPTION: Perform the setup function for the testcase.
#
# PARAMETERS:   	None.
#
# RETURNS:      	None.
#=============================================================================
$trace_logic
    TMPBASE=0
    LOOPS=10
    SIZE=30
    RANDOM_SIZE=0
    DISK_SIZE=0
    while getopts d:hl:s:S:v arg
    do
	case $arg in

        d)  # append $$ to TMP, as it is recursively
            # removed at end of script.
            export TMPBASE=$OPTARG
            TMP="${TMPBASE}/fs_di-$$"
            export TESTFS="$TMP";;
        h)  usage
	    exit 0;;

        l)  # Execute user defined number of loops.
            LOOPS=$OPTARG;;

        s)  # Size of data file to create
            SIZE=$OPTARG
	    if [ $SIZE -eq 0 ]; then
              RANDOM_SIZE=1
	    fi;;

	v)  # Verbose
	    trace_logic=${trace_logic:-"set -x"};;

        S)  # Size of usable partition, which is used for creating creating the files
            DISK_SIZE=$OPTARG;;

       \?) usage
	   exit 0;;
       esac
    done
    if [ $TMPBASE = "0" ]; then
      tst_resm TBROK "You must specify the target directory [-d]"
      exit 1
    fi

    export TST_COUNT=$LOOPS

    echo ""
    echo "Test Options:"
    echo " Tested Filesystem: $TESTFS"
    echo "             Loops: $LOOPS"
    if [ $RANDOM_SIZE -eq 0 ];then
	    echo "    Data File Size: $SIZE"
    else
	    echo "    Data File Size: Random"
    fi
    sleep 5

    $trace_logic
    mkdir -p $TCtmp || end_testcase "Could not create $TCtmp"
    chmod 777 $TCtmp
    mkdir -p $TESTFS || end_testcase "Could not create $TESTFS"
    chmod 777 $TESTFS


#=============================================================================
# FUNCTION NAME:        main
#
# FUNCTION DESCRIPTION: Perform the test
#
# PARAMETERS:   	None.
#
# RETURNS:      	None.
#=============================================================================
  loopcount=0
  tst_resm TINFO "Test Started"
  while [ $loopcount -lt $LOOPS ]
    do
	if [ $RANDOM_SIZE -eq 1 ]; then
  	  SIZE=$RANDOM
	  let "SIZE %= 500"
	  while [ $SIZE -lt 10 ]
	    do
              SIZE=$RANDOM
              let "SIZE %= 500"
 	    done
      	fi
  	create_datafile $SIZE $TCtmp/testfile >/dev/null
	  if [ $? != 0 ]; then
		end_testcase "Could not create testfile of size ${SIZE}Mb"
	  fi
	RANDOM_DEPTH=$RANDOM
	: $(( RANDOM_DEPTH %= 500 ))

	RANDOM_LENGTH=$RANDOM
	: $(( RANDOM_LENGTH %= 500 ))
	RANDOM_LENGTH=$(( $RANDOM_LENGTH / 10 ))

	NameCount=0
	DepthCount=0
	FILEPATH=""
	while [ $DepthCount -lt $RANDOM_DEPTH ]
	  do
	      if [ $NameCount -lt $RANDOM_LENGTH ]; then
		 FILEPATH=${FILEPATH}X
		 NameCount=$(( $NameCount + 1 ))
	      else
		 FILEPATH=${FILEPATH}/
		 NameCount=0
	      fi
	      DepthCount=$(( $DepthCount + 1 ))
	  done
	mkdir -p ${TESTFS}/${FILEPATH} || end_testcase "Could not create ${TESTFS}/${FILEPATH}"
	chmod -R 777 $TESTFS

	cp $TCtmp/testfile ${TESTFS}/${FILEPATH}
	cmp $TCtmp/testfile ${TESTFS}/${FILEPATH}/testfile
	retval=$?
	if [ "$retval" != 0 ]; then
		end_testcase "Error in loop $loopcount: cmp after write FAILED"
	fi
	cp ${TESTFS}/${FILEPATH}/testfile $TCtmp/testfile_copy
	cmp $TCtmp/testfile $TCtmp/testfile_copy
	retval=$?
	if [ "$retval" != 0 ]; then
		end_testcase "Error in loop $loopcount: cmp after read FAILED"
	fi
	rm -rf ${TESTFS}/${FILEPATH}
	rm -f $TCtmp/testfile*
	loopcount=$(( $loopcount + 1 ))
	tst_resm TINFO "Completed Loop $loopcount"
    done
    if [ "$DISK_SIZE" != 0 ]; then
    #Create a datafile of size half of the disk size
    tst_resm TINFO "Creating fragmented files. Please wait..."
    DISK_SIZE=$(( $DISK_SIZE / 2 ))
	if [ "$DISK_SIZE" == 0 ]; then
		DISK_SIZE=1
	fi
    create_datafile $DISK_SIZE $TCtmp/testfile >/dev/null
    retval=$?
    if [ "$retval" != 0 ]; then
        end_testcase "Error in creating data file"
    fi

    #Invoke frag to create 2 fragmented files and copy data file to both the files
    frag $TCtmp/testfile $TMPBASE
    retval=$?
    if [ "$retval" != 0 ]; then
        end_testcase "Error in creating frag files"
    fi
    tst_resm TINFO "Created fragmented files"

    #Compare both frag files with data file
    cmp $TCtmp/testfile $TMPBASE/frag1
    retval=$?
    if [ "$retval" != 0 ]; then
        end_testcase "frag1 and datafile are not matching"
    fi
    if [ "$retval" != 0 ]; then
       end_testcase "frag2 and datafile are not matching"
    fi

    tst_resm TINFO "Completed test with fragmented files"
	rm -rf $TMPBASE/*
	rm -f $TCtmp/testfile*
    fi
end_testcase