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Bug 1817726 - libblkid BLOCK_SIZE
Summary: libblkid BLOCK_SIZE
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: util-linux
Version: 8.3
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: 8.3
Assignee: Karel Zak
QA Contact: Radka Brychtova
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-03-26 19:53 UTC by David Teigland
Modified: 2020-11-04 02:10 UTC (History)
1 user (show)

Fixed In Version: util-linux-2.32.1-23.el8
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-11-04 02:06:13 UTC
Type: Bug
Target Upstream Version:
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2020:4575 0 None None None 2020-11-04 02:06:27 UTC

Description David Teigland 2020-03-26 19:53:48 UTC 
Description of problem:

lvm has a couple of features planned for 8.3 (writecache and integrity) that need this upstream commit to check the fs block size:

commit cd129b7d2fecd5f2013512936de2db1bf244aa75
Author: Mikulas Patocka <mpatocka>
Date:   Mon Sep 2 12:28:39 2019 +0200

    blkid: retport block size of a filesystem
    
    This patch extends libblkid, so that it reports filesystem block size.
    
    When blkid returns a specific number in the BLOCK_SIZE attribute, it
    guarantees that all the bios submitted by the filesystem are aligned on
    this boundary.
    
    We need this because when we want to enable dm-integrity or dm-writecache
    on an existing filesystem, we need to know filesystem block size, so that
    dm-integrity or dm-writecache is initialized with matching block size.
    
    We could always use block size 512 for dm-integrity and dm-writecache, but
    that would cause metadata overhead and performance degradation. On the
    other hand, if we used block size 4096, it would fail if the filesystem
    has smaller blocksize.
    
    [kzak: - move vfat BLOCK_SIZE to probing function
                      - remove unwanted debug fprintf from ZFS prober]
    
    Signed-off-by: Mikulas Patocka <mpatocka>
    Signed-off-by: Karel Zak <kzak>


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


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Comment 2 David Teigland 2020-06-10 22:45:34 UTC 
I'd like to find a way to test this with lvm, is there a build with this patch I can install on rhel8?
Thanks
Comment 3 Karel Zak 2020-06-11 07:12:39 UTC 
(In reply to David Teigland from comment #2)
> I'd like to find a way to test this with lvm, is there a build with this
> patch I can install on rhel8?

Not yet, I plan 8.3 build for the next week.
Comment 4 David Teigland 2020-06-11 21:25:19 UTC 
The new BLOCK_SIZE field is working well for lvm, thanks.
Comment 10 errata-xmlrpc 2020-11-04 02:06:13 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 (util-linux bug fix and enhancement update), 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-2020:4575
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