#!/bin/sh

: << =cut

=head1 NAME

nfsd - Plugin to monitor NFS server activity

=head1 CONFIGURATION

No configuration

=head1 AUTHORS

Plugin created by Alexandre Dupouy, with the assistance of Mike Fedyk

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

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

=cut

NFSD=/proc/net/rpc/nfsd

proc="getattr setattr lookup access readlink read write create mkdir symlink mknod remove rmdir rename link readdir readdirplus fsstat fsinfo pathconf commit"

if [ "$1" = "autoconf" ]; then
	if [ -f "$NFSD" ]; then
		grep -q proc3 "$NFSD"
		if grep -q proc3 "$NFSD"; then
			echo yes
		else
			echo "no (no proc3 in $NFSD)"
		fi
		exit 0
	else
		echo "no (no $NFSD)"
		exit 0
	fi
fi

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

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

awk '/proc3/ {
    split("'"$proc"'", names)
    split($0,values)
    for (e in names)
        printf("%s.value %d\n", names[++i], values[i+3]);
  }' $NFSD
