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Bug 1511085 - vdo crate --vdoHashZoneThreads does not allow value 0
Summary: vdo crate --vdoHashZoneThreads does not allow value 0
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: vdo
Version: 7.5
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Ken Raeburn
QA Contact: Jakub Krysl
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-11-08 16:02 UTC by Jakub Krysl
Modified: 2019-03-06 01:13 UTC (History)
3 users (show)

Fixed In Version: 6.1.0.45
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-04-10 15:47:46 UTC
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHEA-2018:0871 0 None None None 2018-04-10 15:48:08 UTC

Description Jakub Krysl 2017-11-08 16:02:05 UTC 
Description of problem:
According to help / manpage, --vdoHashZoneThreads should allow value 0, yet vdo does not allow this:
vdo: error: option --vdoHashZoneThreads: must be an integer at least 1 and less than or equal to 100

help / manpage:
    --vdoHashZoneThreads=<threadCount>              
                        Specifies the number of threads across which to                                  
                        subdivide parts of the VDO processing based on the                               
                        hash value computed from the block data. The default                             
                        is 1; the value must be at least 0 and less than or                              
                        equal to 100. vdoHashZonesThreads, vdoLogicalThreads                             
                        and vdoPhysicalThreads must be either all zero or all                            
                        non-zero.

Version-Release number of selected component (if applicable):
vdo-6.1.0.34-8

How reproducible:
100%

Steps to Reproduce:
1. vdo create --device DEVICE --name NAME --vdoHashZoneThreads 0
1. vdo create --device DEVICE --name NAME --vdoHashZoneThreads 0 --vdoLogicalThreads 0 --vdoPhysicalThreads 0

Actual results:
vdo: error: option --vdoHashZoneThreads: must be an integer at least 1 and less than or equal to 100

Expected results:
1. vdo error saying logical and physical threads must be 0 too
2. vdo created

Additional info:
Comment 2 Ken Raeburn 2017-11-10 23:54:18 UTC 
Range check fixed.
Comment 4 Jakub Krysl 2017-11-14 14:52:22 UTC 
Tested with vdo-6.1.0.46-9:

# vdo create --name vdo --device /dev/sda3 --vdoHashZoneThreads 0
vdo: ERROR - Options --vdoHashZoneThreads, --vdoLogicalThreads, and --vdoPhysicalThreads must either all be zero or all be nonzero

# vdo create --name vdo --device /dev/sda3 --vdoHashZoneThreads 0 --vdoLogicalThreads 0 --vdoPhysicalThreads 0 --verbose
Creating VDO vdo
    modprobe kvdo
    vdoformat --uds-checkpoint-frequency=0 --uds-memory-size=0.25 /dev/sda3
    vdodumpconfig /dev/sda3
Starting VDO vdo
    dmsetup status vdo
    modprobe kvdo
    dmsetup create vdo --table '0 940036096 dedupe /dev/sda3 4096 disabled 0 32768 16380 on sync vdo ack=1,bio=4,bioRotationInterval=64,cpu=2,hash=0,logical=0,physical=0'
    dmsetup status vdo
Starting compression on VDO vdo
    dmsetup message vdo 0 compression on
    dmsetup status vdo
VDO instance 5 volume is ready at /dev/mapper/vdo
Comment 7 errata-xmlrpc 2018-04-10 15:47:46 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2018:0871
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