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Bug 1515109

Summary:	cache_restore tool may corrupt cache metadata [rhel-7.4.z]
Product:	Red Hat Enterprise Linux 7	Reporter:	Oneata Mircea Teodor <toneata>
Component:	device-mapper-persistent-data	Assignee:	Marian Csontos <mcsontos>
Status:	CLOSED ERRATA	QA Contact:	Jakub Krysl <jkrysl>
Severity:	high	Docs Contact:	Apurva Bhide <abhide>
Priority:	high
Version:	7.5	CC:	abhide, agk, heinzm, jkrysl, lmiksik, lvm-team, mcsontos, msnitzer, rhandlin, thornber
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	device-mapper-persistent-data-0.7.0-0.1.rc6.el7_4.1	Doc Type:	Bug Fix
Doc Text:	Previously, the cache_restore utility passed incorrect arguments to a function. Additionally, it missed a call to flush dirty bits when version 2 metadata of the cache was used. As a consequence, the utility corrupted the cache metadata. With this update, cache_restore now handles the arguments correctly and adds the missing call. As a result, the utility no longer corrupts version 2 metadata.	Story Points:	---
Clone Of:	1512844	Environment:
Last Closed:	2018-01-25 11:40:38 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1512844
Bug Blocks:

Description Oneata Mircea Teodor 2017-11-20 07:26:30 UTC

This bug has been copied from bug #1512844 and has been proposed to be backported to 7.4 z-stream (EUS).

Comment 3 Jakub Krysl 2017-11-20 13:30:32 UTC

before:
# cache_restore -V
0.7.0-0.1.rc6.el7
# cache_restore -i metadata -o /dev/mapper/vgtest-swapvol --debug-override-metadata-version 2
cache_restore: /usr/include/boost/optional/optional.hpp:631: boost::optional<T>::reference_type boost::optional<T>::get() [with T = long unsigned int; boost::optional<T>::reference_type = long unsigned int&]: Assertion `this->is_initialized()' failed.
Aborted (core dumped)

with this patch:
# cache_restore -V
0.7.0-0.1.rc6.el7_4.1
# cache_restore -i metadata -o /dev/mapper/vgtest-swapvol --debug-override-metadata-version 2
Restoring: [==================================================]   100%

Comment 6 errata-xmlrpc 2018-01-25 11:40:38 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/RHBA-2018:0143