function volinfo_field()
{
    local vol=$1;
    local field=$2;

    $CLI volume info $vol | grep "^$field: " | sed 's/.*: //';
}


function brick_count()
{
    local vol=$1;

    $CLI volume info $vol | egrep "^Brick[0-9]+: " | wc -l;
}

function online_brick_count ()
{
    pidof glusterfsd | wc -w
}

function volume_option()
{
        local vol=$1
        local key=$2
        $CLI volume info $vol | egrep "^$key: " | cut -f2 -d' ';
}

function rebalance_status_field {
        #The rebalance status can be upto 3 words, (ex:'fix-layout in progress'), hence the awk-print $7 thru $9.
        #But if the status is less than 3 words, it also prints the next field i.e the run_time_in_secs.(ex:'completed 3.00').
        #So we trim the numbers out with  `tr`. Finally remove the trailing white spaces with sed. What we get is one of the
        #strings in the 'cli_vol_task_status_str' char array of cli-rpc-ops.c

        $CLI volume rebalance $1 status | awk '{print $7,$8,$9}' |sed -n 3p |tr -d '[^0-9+\.]'|sed 's/ *$//g'
}

function remove_brick_status_completed_field {
        local vol=$1
        local brick_list=$2
        $CLI volume remove-brick $vol $brick_list status | awk '{print $7}' | sed -n 3p
}

function get_mount_process_pid {
        local vol=$1
        ps aux | grep glusterfs | grep -E "volfile-id[ =]/?$vol " | awk '{print $2}' | head -1
}

function get_nfs_pid ()
{
        ps aux | grep "volfile-id\ gluster\/nfs" | awk '{print $2}' | head -1
}

function read_nfs_pidfile ()
{
        echo `cat /var/lib/glusterd/nfs/run/nfs.pid`
}

function cleanup_statedump {
       pid=$1
       rm -f $statedumpdir/*$pid.dump.*
       #.vimrc friendly comment */
}

function generate_statedump {
        local fpath=""
        pid=$1
        #remove old stale statedumps
        cleanup_statedump $pid
        kill -USR1 $pid
        #Wait till the statedump is generated
        sleep 1
        fname=$(ls $statedumpdir | grep -E "\.$pid\.dump\.")
        echo $statedumpdir/$fname
}

function generate_mount_statedump {
        local vol=$1
        generate_statedump $(get_mount_process_pid $vol)
}

function cleanup_mount_statedump {
        local vol=$1
        cleanup_statedump $(get_mount_process_pid $vol)
}

function _afr_child_up_status {
        local vol=$1
        #brick_id is (brick-num in volume info - 1)
        local brick_id=$2
        local gen_state_dump=$3
        local fpath=$($gen_state_dump $vol)
        up=$(grep -B1 trusted.afr.$vol-client-$brick_id $fpath | head -1 | cut -f2 -d'=')
        rm -f $fpath
        echo "$up"
}

function afr_child_up_status {
        local vol=$1
        #brick_id is (brick-num in volume info - 1)
        local brick_id=$2
        _afr_child_up_status $vol $brick_id generate_mount_statedump
}

function get_shd_process_pid {
        local vol=$1
        ps aux | grep glusterfs | grep -E "glustershd/run/glustershd.pid" | awk '{print $2}' | head -1
}

function generate_shd_statedump {
        local vol=$1
        generate_statedump $(get_shd_process_pid $vol)
}

function generate_nfs_statedump {
        local vol=$1
        generate_statedump $(get_nfs_pid $vol)
}

function generate_brick_statedump {
        local vol=$1
        local host=$2
        local brick=$3
        generate_statedump $(get_brick_pid $vol $host $brick)
}

function afr_child_up_status_in_shd {
        local vol=$1
        #brick_id is (brick-num in volume info - 1)
        local brick_id=$2
        _afr_child_up_status $vol $brick_id generate_shd_statedump
}

function afr_child_up_status_in_nfs {
        local vol=$1
        #brick_id is (brick-num in volume info - 1)
        local brick_id=$2
        _afr_child_up_status $vol $brick_id generate_nfs_statedump
}

function nfs_up_status {
        gluster volume status | grep "NFS Server" | awk '{print $6}'
}

function glustershd_up_status {
        gluster volume status | grep "Self-heal Daemon" | awk '{print $6}'
}

function get_brick_pid {
        local vol=$1
        local host=$2
        local brick=$3
        local brick_hiphenated=$(echo $brick | tr '/' '-')
        echo `cat /var/lib/glusterd/vols/$vol/run/${host}${brick_hiphenated}.pid`
}

function kill_brick {
        local vol=$1
        local host=$2
        local brick=$3
        kill -9 $(get_brick_pid $vol $host $brick)
}

function check_option_help_presence {
        local option=$1
        $CLI volume set help | grep "^Option:" | grep -w $option
}

function afr_get_changelog_xattr {
        local file=$1
        local xkey=$2
        getfattr -n $xkey -e hex $file 2>/dev/null | grep "client-" | cut -f2 -d'='
}

function afr_get_pending_heal_count {
        local vol=$1
        gluster volume heal $vol info | grep "Number of entries" | awk '{ sum+=$4} END {print sum}'
}

function afr_get_index_path {
        local brick_path=$1
        echo "$brick_path/.glusterfs/indices/xattrop"
}

function afr_get_num_indices_in_brick {
        local brick_path=$1
        echo $(ls $(afr_get_index_path $brick_path) | grep -v xattrop | wc -l)
}

function gf_get_gfid_xattr {
        file=$1
        getfattr -n trusted.gfid -e hex $file 2>/dev/null | grep "trusted.gfid" | cut -f2 -d'='
}

function gf_gfid_xattr_to_str {
        xval=$1
        echo "${xval:2:8}-${xval:10:4}-${xval:14:4}-${xval:18:4}-${xval:22:12}"
}

function gf_check_file_opened_in_brick {
        vol=$1
        host=$2
        brick=$3
        realpath=$4
        ls -l /proc/$(get_brick_pid $vol $host $brick)/fd | grep "${realpath}$" 2>&1 > /dev/null
        if [ $? -eq 0 ]; then
                echo "Y"
        else
                echo "N"
        fi
}

function gf_get_gfid_backend_file_path {
        brickpath=$1
        filepath_in_brick=$2
        gfid=$(gf_get_gfid_xattr "$brickpath/$filepath_in_brick")
        gfidstr=$(gf_gfid_xattr_to_str $gfid)
        echo "$brickpath/.glusterfs/${gfidstr:0:2}/${gfidstr:2:2}/$gfidstr"
}

function gf_rm_file_and_gfid_link {
        brickpath=$1
        filepath_in_brick=$2
        rm -f $(gf_get_gfid_backend_file_path $brickpath $filepath_in_brick)
        rm -f "$brickpath/$filepath_in_brick"
}


function gd_is_replace_brick_completed {
        local host=$1
        local vol=$2
        local src_brick=$3
        local dst_brick=$4
        $CLI volume replace-brick $vol $src_brick $dst_brick status | grep -i "Migration complete"
        if [ $? -eq 0 ]; then
                echo "Y"
        else
                echo "N"
        fi
}

function dht_get_layout {
	local my_xa=trusted.glusterfs.dht
	getfattr -d -e hex -n $my_xa $1 2> /dev/null | grep "$my_xa=" | cut -d= -f2
}

function afr_get_specific_changelog_xattr ()
{
        local path=$1
        local key=$2
        local type=$3
        local specific_changelog=""

        changelog_xattr=$(afr_get_changelog_xattr "$path" "$key")
        if [ "$type" == "data" ]; then
                specific_changelog=${changelog_xattr:2:8}
        elif [ "$type" == "metadata" ]; then
                specific_changelog=${changelog_xattr:10:8}
        elif [ "$type" == "entry" ]; then
                specific_changelog=${changelog_xattr:18:8}
        else
                specific_changlog="error"
        fi

        echo $specific_changelog
}
##
 # query pathinfo xattr and extract POSIX pathname(s)
 ##
function get_backend_paths {
       local path=$1

       getfattr -m . -n trusted.glusterfs.pathinfo $path | tr ' ' '\n' | sed -n 's/<POSIX.*:.*:\(.*\)>.*/\1/p'
}

#Gets the xattr value in hex, also removed 0x in front of the value
function get_hex_xattr {
        local key=$1
        local path=$2
        getfattr -d -m. -e hex $2 2>/dev/null | grep $1 | cut -f2 -d'=' | cut -f2 -d'x'
}

function cumulative_stat_count {
    echo "$1" | grep "Cumulative Stats:" | wc -l
}

function incremental_stat_count {
    echo "$1" | grep "Interval$2Stats:" | wc -l
}

function cleared_stat_count {
    echo "$1" | grep "Cleared stats." | wc -l
}

function data_read_count {
    echo "$1" | grep "Data Read:$2bytes" | wc -l
}

function data_written_count {
    echo "$1" | grep "Data Written:$2bytes" | wc -l
}