Bug 325881 - snmpwalk of UCD-SNMP-MIB dskEntry causes bad data if "disks" mount point contain spaces
snmpwalk of UCD-SNMP-MIB dskEntry causes bad data if "disks" mount point cont...
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: net-snmp (Show other bugs)
i386 Linux
low Severity medium
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Assigned To: Jan Safranek
Depends On:
Blocks: 348681 400591
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Reported: 2007-10-10 03:37 EDT by Jonathan Barber
Modified: 2008-07-24 15:50 EDT (History)
0 users

See Also:
Fixed In Version: RHBA-2008-0700
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2008-07-24 15:50:11 EDT
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Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Jonathan Barber 2007-10-10 03:37:05 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20070719 CentOS/ Firefox/

Description of problem:
If a ext3 FS on a LVM2 LV has a mount point containing spaces, then snmpd returns bad data when queried.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Install net-snmp
2. Create mount point with a space in the path
# lvcreate -n really-really-really-long-name -l 1 general
# mkfs.ext3 /dev/mapper/general-really--really--really--long--name -L temp
# mount -L temp "/fc/stupid name"
3. Configure snmpd to report the disk stats of that disk
# cat >> /etc/snmp/snmpd.conf
disk "/fc/stupid name"
4. Query snmpd for the stats
# snmpwalk -v 2c -c secret UCD-SNMP-MIB::dskPath
# snmpwalk -v 2c -c secret UCD-SNMP-MIB::dskPercent

Actual Results:
No stats are seen for the disk:

# snmpwalk -v 2c -c secret UCD-SNMP-MIB::dskPath
UCD-SNMP-MIB::dskPath.1 /
UCD-SNMP-MIB::dskPath.2 /fc/cjw
UCD-SNMP-MIB::dskPath.3 /fc/kgs
UCD-SNMP-MIB::dskPath.4 /fc/dava
UCD-SNMP-MIB::dskPath.5 /fc/slsit
UCD-SNMP-MIB::dskPath.6 /fc/general
UCD-SNMP-MIB::dskPath.7 /fc/em
UCD-SNMP-MIB::dskPath.8 /fc/cat
UCD-SNMP-MIB::dskPath.9 /fc/isn
UCD-SNMP-MIB::dskPath.10 /fc/mrc-new
UCD-SNMP-MIB::dskPath.11 /fc/prc
UCD-SNMP-MIB::dskPath.12 /fc/tpfs-common
UCD-SNMP-MIB::dskPath.13 /fc/stupid
# snmpwalk -v 2c -c secret UCD-SNMP-MIB::dskdevice
UCD-SNMP-MIB::dskDevice.1 /dev/sda3
UCD-SNMP-MIB::dskDevice.2 /dev/mapper/cjw-lvol0
UCD-SNMP-MIB::dskDevice.3 /dev/mapper/kgs-lvol0
UCD-SNMP-MIB::dskDevice.4 /dev/mapper/DAVA-lvol0
UCD-SNMP-MIB::dskDevice.5 /dev/mapper/SLSIT-lvol0
UCD-SNMP-MIB::dskDevice.6 /dev/mapper/general-lvol0
UCD-SNMP-MIB::dskDevice.7 /dev/mapper/em-lvol0
UCD-SNMP-MIB::dskDevice.8 /dev/mapper/cat-lvol0
UCD-SNMP-MIB::dskDevice.9 /dev/mapper/isn-lvol0
UCD-SNMP-MIB::dskDevice.10 /dev/mapper/mrc-lvol0
UCD-SNMP-MIB::dskDevice.11 /dev/mapper/general-prc--common
UCD-SNMP-MIB::dskDevice.12 /dev/mapper/general-tpfs--common
UCD-SNMP-MIB::dskDevice.13 /dev/mapper/general-really--really--really--long--name
# snmpwalk -v 2c -c secret UCD-SNMP-MIB::dskPercent
UCD-SNMP-MIB::dskPercent.1 34
UCD-SNMP-MIB::dskPercent.2 52
UCD-SNMP-MIB::dskPercent.3 24
UCD-SNMP-MIB::dskPercent.4 98
UCD-SNMP-MIB::dskPercent.5 98
UCD-SNMP-MIB::dskPercent.6 88
UCD-SNMP-MIB::dskPercent.7 100
UCD-SNMP-MIB::dskPercent.8 83
UCD-SNMP-MIB::dskPercent.9 11
UCD-SNMP-MIB::dskPercent.10 52
UCD-SNMP-MIB::dskPercent.11 16
UCD-SNMP-MIB::dskPercent.12 2

Note that dskPath doesn't have the full path for device 13, and that dskPercent only goes to item 12.

The later occurs for the following UCD-SNMP-MIB objects:

Expected Results:
Should have seen the stats for the disk as for the other disks.

Additional info:
snmpd reports via syslog:
Oct 10 08:27:48 modi net-snmp[3012]: Couldn't open device /dev/mapper/general-really--really--really--long--name
Oct 10 08:27:48 modi net-snmp[3012]: statvfs dev/disk: No such file or directory

But a simple program making the statvfs() call shows this is bogus.
Comment 2 RHEL Product and Program Management 2007-11-28 22:57:05 EST
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
Comment 8 errata-xmlrpc 2008-07-24 15:50:11 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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