Bug 2118379

Summary:	vdo kernel modules aren't available for the latest CentOS Stream 8 kernel, kernel-core-4.18.0-408.el8.x86_64
Product:	Red Hat Enterprise Linux 8	Reporter:	Kris Knigga <kris+bugzilla>
Component:	kmod-kvdo	Assignee:	Susan LeGendre-McGhee <slegendr>
Status:	CLOSED NEXTRELEASE	QA Contact:	Filip Suba <fsuba>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	CentOS Stream	CC:	awalsh, bstinson, ctimko, cwei, jwboyer, slegendr
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-08-16 17:29:28 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Kris Knigga 2022-08-15 16:10:00 UTC

The most recent published kernel modules for vdo appear to be for the 4.18.0-373 kernel, and won't load on 4.18.0-408 due to symbol version issues.

$ uname -r
4.18.0-408.el8.x86_64

$ rpm -qil kmod-kvdo
Name : kmod-kvdo
Version : 6.2.6.14
Release : 84.el8
Architecture: x86_64
Install Date: Thu Aug 11 08:10:05 2022
Group : Unspecified
Size : 1733033
License : GPLv2+
Signature : RSA/SHA256, Thu Apr 7 10:25:42 2022, Key ID 05b555b38483c65d
Source RPM : kmod-kvdo-6.2.6.14-84.el8.src.rpm
Build Date : Thu Apr 7 10:02:18 2022
Build Host : x86-01.mbox.centos.org
Relocations : (not relocatable)
Packager : CentOS Buildsys <bugs>
Vendor : CentOS
URL : http://github.com/dm-vdo/kvdo
Summary : Kernel Modules for Virtual Data Optimizer
Description :
Virtual Data Optimizer (VDO) is a device mapper target that delivers
block-level deduplication, compression, and thin provisioning.

This package provides the kernel modules for VDO.
/etc/depmod.d/kvdo.conf
/lib/modules/4.18.0-373.el8.x86_64
/lib/modules/4.18.0-373.el8.x86_64/extra
/lib/modules/4.18.0-373.el8.x86_64/extra/kmod-kvdo
/lib/modules/4.18.0-373.el8.x86_64/extra/kmod-kvdo/uds
/lib/modules/4.18.0-373.el8.x86_64/extra/kmod-kvdo/uds/uds.ko
/lib/modules/4.18.0-373.el8.x86_64/extra/kmod-kvdo/vdo
/lib/modules/4.18.0-373.el8.x86_64/extra/kmod-kvdo/vdo/kvdo.ko
/usr/lib/.build-id
/usr/lib/.build-id/d4
/usr/lib/.build-id/d4/be5d85083e15dfe4febbb3bade63394b72e294
/usr/lib/.build-id/dd
/usr/lib/.build-id/dd/3520107c721f3e5c472f36168d46ca6accb2f5
/usr/share/doc/kmod-kvdo/greylist.txt

$ sudo insmod /lib/modules/4.18.0-373.el8.x86_64/extra/kmod-kvdo/vdo/kvdo.ko
insmod: ERROR: could not insert module /lib/modules/4.18.0-373.el8.x86_64/extra/kmod-kvdo/vdo/kvdo.ko: Invalid parameters

$ dmesg | tail
[174857.628302] kvdo: disagrees about version of symbol dm_set_target_max_io_len
[174857.628304] kvdo: Unknown symbol dm_set_target_max_io_len (err -22)
[174857.628412] kvdo: disagrees about version of symbol dm_register_target
[174857.628414] kvdo: Unknown symbol dm_register_target (err -22)
[174857.628489] kvdo: disagrees about version of symbol dm_table_get_mode
[174857.628491] kvdo: Unknown symbol dm_table_get_mode (err -22)
[174857.628533] kvdo: disagrees about version of symbol dm_table_get_md
[174857.628535] kvdo: Unknown symbol dm_table_get_md (err -22)
[174857.628597] kvdo: disagrees about version of symbol dm_get_device
[174857.628599] kvdo: Unknown symbol dm_get_device (err -22)

Comment 1 Susan LeGendre-McGhee 2022-08-15 19:47:06 UTC

Thank you for reaching out. The newest version of vdo for RHEL 8/CentOS 8 (version 6.2.7.17) is compatible with kernel 4.18.0-408.el8.x86_64. I recommend downloading and installing it from https://github.com/dm-vdo/kvdo/releases to correct this issue. Otherwise, I see in the CentOS 8 Stream GitLab that version 6.2.7.17 was imported two days ago. As such, I'd expect it to be available on the CentOS Stream 8 site soon.

Comment 2 Susan LeGendre-McGhee 2022-08-17 16:19:15 UTC

*** Bug 2118884 has been marked as a duplicate of this bug. ***

Comment 3 Kris Knigga 2022-08-18 19:38:23 UTC

(In reply to Susan LeGendre-McGhee from comment #1)
> Thank you for reaching out. The newest version of vdo for RHEL 8/CentOS 8
> (version 6.2.7.17) is compatible with kernel 4.18.0-408.el8.x86_64. I
> recommend downloading and installing it from
> https://github.com/dm-vdo/kvdo/releases to correct this issue. Otherwise, I
> see in the CentOS 8 Stream GitLab that version 6.2.7.17 was imported two
> days ago. As such, I'd expect it to be available on the CentOS Stream 8 site
> soon.

Thanks for the update.