#!/usr/bin/sh
# -*- sh -*-

: << =cut

=head1 NAME

nfs4_client - Plugin to monitor NFSv4 client traffic

=head1 CONFIGURATION

No configuration

=head1 AUTHOR

Unknown author

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

NFS=/proc/net/rpc/nfs

proc="read write commit open open_confirm open_noattr open_downgrade close setattr fsinfo renew setclientid setclientid_confirm lock lockt locku access getattr lookup lookup_root remove rename link symlink create pathconf statfs readlink readdir server_caps delegreturn getacl setacl"

if [ "$1" = "autoconf" ]; then
	if [ -f "$NFS" ]; then
		if grep -q proc4 "$NFS"; then
			echo yes
		else
			echo "no (no proc4 in $NFS)"
		fi
		exit 0
	else
		echo "no (no $NFS)"
		exit 0
	fi
fi

if [ "$1" = "config" ]; then

	echo 'graph_title NFSv4 Client'
	echo 'graph_args --base 1000 -l 0'
	# shellcheck disable=SC2016
	echo 'graph_vlabel requests / ${graph_period}'
	echo 'graph_total total'
	echo 'graph_category NFS'
	for a in $proc ; do echo "$a.label $a" ; echo "$a.type DERIVE"; echo "$a.min 0"; done
	exit 0
fi

awk '/proc4/ {
    split("'"$proc"'", names)
    split($0,values)
    for (e in names) {
        printf("%s.value %d\n", names[++i], values[i+3]);
    }
}' $NFS