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#!/usr/bin/sh
#
# Plugin to monitor SELinux Access Vector Cache (AVC).
#
# config (required)
# autoconf (optional - used by munin-config)
#
# GNU GPL, Lars Strand
#
#
# Magic markers (used by munin-config and some installation scripts (i.e.
# optional)):
#%# family=auto
#%# capabilities=autoconf
AVCSTATS="/selinux/avc/cache_stats"
if [ "$1" = "autoconf" ]; then
if [ -r $AVCSTATS ]; then
echo yes
else
echo "no (missing $AVCSTATS file)"
fi
exit 0
fi
if [ "$1" = "config" ]; then
echo "graph_title SELinux Access Vector Cache"
echo 'graph_args -l 0 --base 1000'
echo 'graph_vlabel AVC operations'
echo 'graph_category system'
echo 'graph_order lookups hits misses allocations reclaims frees'
echo 'lookups.label lookups'
echo 'lookups.type DERIVE'
echo 'lookups.min 0'
echo 'lookups.max 1000000000'
echo 'lookups.draw AREA'
echo 'lookups.colour ff0000' # Red
echo 'lookups.info Number of access vector lookups. This number is a good indicator of the load beeing placed on the AVC.'
echo 'hits.label hits'
echo 'hits.type DERIVE'
echo 'hits.min 0'
echo 'hits.max 1000000000'
echo 'hits.draw STACK'
echo 'hits.colour 0022ff' # Blue
echo 'hits.info Number of access vector hits.'
echo 'misses.label misses'
echo 'misses.type DERIVE'
echo 'misses.min 0'
echo 'misses.max 1000000000'
echo 'misses.draw STACK'
echo 'misses.colour 990000' # Darker red
echo 'misses.info Number of cache misses.'
echo 'allocations.label allocations'
echo 'allocations.type DERIVE'
echo 'allocations.min 0'
echo 'allocations.max 100000000'
echo 'allocations.draw STACK'
echo 'allocations.colour ffa500' # Orange
echo 'allocations.info Number of AVC entries allocated.'
echo 'reclaims.label reclaims'
echo 'reclaims.type DERIVE'
echo 'reclaims.min 0'
echo 'reclaims.max 1000000000'
echo 'reclaims.draw STACK'
echo 'reclaims.colour 00aaaa' # Darker turquoise
echo 'reclaims.info Number of current total reclaimed AVC entries. If this keeps changing, you may need to increase the cache size (/selinux/avc/cache_threshold).'
echo 'frees.label frees'
echo 'frees.type DERIVE'
echo 'frees.min 0'
echo 'frees.max 1000000000'
echo 'frees.draw STACK'
echo 'frees.colour 00ff7f' # Spring green
echo 'frees.info Number of free AVC entries.'
exit 0
fi
if [ -r $AVCSTATS ]; then
{ read HEADER
while read lookups hits misses allocations reclaims frees; do
LOOKUPS=$(($LOOKUPS + $lookups))
HITS=$(($HITS + $hits))
MISSES=$(($MISSES + $misses))
ALLOCATIONS=$(($ALLOCATIONS + $allocations))
RECLAIMS=$(($RECLAIMS + $reclaims))
FREES=$(($FREES + $frees))
done
} < $AVCSTATS
echo "lookups.value $LOOKUPS"
echo "hits.value $HITS"
echo "misses.value $MISSES"
echo "allocations.value $ALLOCATIONS"
echo "reclaims.value $RECLAIMS"
echo "frees.value $FREES"
else
echo "lookups.value U"
echo "hits.value U"
echo "misses.value U"
echo "allocations.value U"
echo "reclaims.value U"
echo "frees.value U"
fi