F2FS partition bug with net-snmp (Issue 111)

Hi Team,

I've put a bug in Github a few weeks back without fully understanding it. At first I thought it was config, or related to NVME drives however it turns out net-snmp does not recognise the F2FS partition format.

A very basic example of this is on one of my servers that have a rootfs with btrfs, and a mount "/cache" as f2fs:

Filesystem      Size  Used Avail Use% Mounted on
/dev/nvme0n1p3  451G  6.7G  444G   2% /
/dev/sda1       3.8T  1.4T  2.5T  36% /cache


My /etc/snmp/snmpd.conf is also basic:
rocommunity public

disk /
disk /cache/

Yet a walk cannot see the F2FS partition/mount
snmpwalk -v 2c -c public localhost dsktable
UCD-SNMP-MIB::dskIndex.1 = INTEGER: 1
UCD-SNMP-MIB::dskPath.1 = STRING: /
UCD-SNMP-MIB::dskDevice.1 = STRING: /dev/nvme0n1p3
UCD-SNMP-MIB::dskMinimum.1 = INTEGER: 100000
UCD-SNMP-MIB::dskMinPercent.1 = INTEGER: -1
UCD-SNMP-MIB::dskTotal.1 = INTEGER: 472268800
UCD-SNMP-MIB::dskAvail.1 = INTEGER: 464625932
UCD-SNMP-MIB::dskUsed.1 = INTEGER: 6968036
UCD-SNMP-MIB::dskPercent.1 = INTEGER: 1
UCD-SNMP-MIB::dskPercentNode.1 = INTEGER: 0
UCD-SNMP-MIB::dskTotalLow.1 = Gauge32: 472268800
UCD-SNMP-MIB::dskTotalHigh.1 = Gauge32: 0
UCD-SNMP-MIB::dskAvailLow.1 = Gauge32: 464625932
UCD-SNMP-MIB::dskAvailHigh.1 = Gauge32: 0
UCD-SNMP-MIB::dskUsedLow.1 = Gauge32: 6968036
UCD-SNMP-MIB::dskUsedHigh.1 = Gauge32: 0
UCD-SNMP-MIB::dskErrorFlag.1 = INTEGER: noError(0)
UCD-SNMP-MIB::dskErrorMsg.1 = STRING:


We are rolling out F2FS on all of our flash-enabled systems (which enables significant performance and durability improvements on Flash media) and need assistance resolving this bug so we can resume monitoring of these partitions.

Thanks,

Greg

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