APPLIED: [Pull Request] [kinetic/linux] Regression in ext4 during online resize

[Tim Gardner]

Oops. Thanks.

On 3/23/23 1:22 PM, Luke Nowakowski-Krijger wrote:
> Also forgot to mention that I added the tracking bugs that were missing 
> in the commits.
> 
> - Luke
> 
> On Thu, Mar 23, 2023 at 12:18 PM Luke Nowakowski-Krijger 
> <luke.nowakowskikrijger at canonical.com 
> <mailto:luke.nowakowskikrijger at canonical.com>> wrote:
> 
>     Applied to kinetic:linux master-next,
>     Will be included in the respin for the current cycle (2023.03.20)
> 
>     -Luke
> 
>     On Wed, Mar 22, 2023 at 10:07 AM Tim Gardner
>     <tim.gardner at canonical.com <mailto:tim.gardner at canonical.com>> wrote:
> 
>         BugLink: https://bugs.launchpad.net/bugs/2003816
>         <https://bugs.launchpad.net/bugs/2003816>
> 
>         Issue
> 
>         resize2fs utility is used to resize the filesystem and is
>         idempotent in
>         nature. But in the 5.15 kernel, successive execution of
>         resize2fs is
>         returning error.
> 
>         Reproduction step (on AWS):
> 
>               Create an AWS instance with AMI ami-056a67ea1b8ffa0fc (Linux
>         5.15.0-1022-aws) in us-west-2 region and attach an EBS volume.
>               Format and mount the disk - sudo mkfs.ext4 /dev/xvdb, sudo
>         mkdir -p
>         /mnt/ssd0, sudo mount /dev/xvdb /mnt/ssd0
>               Increase the size of EBS volume.
>               Run sudo resize2fs /dev/xvdb multiple times.
> 
>         The first execution returns -
> 
>         $ sudo resize2fs /dev/xvdb
>         resize2fs 1.45.5 (07-Jan-2020)
>         Filesystem at /dev/xvdb is mounted on /mnt/ssd0; on-line
>         resizing required
>         old_desc_blocks = 2, new_desc_blocks = 3
>         The filesystem on /dev/xvdb is now 5242880 (4k) blocks long.
> 
>         The following execution returns -
> 
>         $ sudo resize2fs /dev/xvdb
>         resize2fs 1.45.5 (07-Jan-2020)
>         The filesystem is already 5242880 (4k) blocks long. Nothing to do!
> 
>         When you run the same step on the latest image
>         ami-0a1d6d351894df6cc
>         (Linux 5.15.0-1026-aws).
> 
>         The first execution returns -
> 
>         $ sudo resize2fs /dev/xvdb
>         resize2fs 1.45.5 (07-Jan-2020)
>         Filesystem at /dev/xvdb is mounted on /mnt/ssd0; on-line
>         resizing required
>         old_desc_blocks = 2, new_desc_blocks = 3
>         The filesystem on /dev/xvdb is now 5242880 (4k) blocks long.
> 
>         The following execution returns
> 
>         $ sudo resize2fs /dev/xvdb
>         resize2fs 1.45.5 (07-Jan-2020)
>         resize2fs: Superblock checksum does not match superblock while
>         trying to
>         open /dev/xvdb
>         Couldn't find valid filesystem superblock.
> 
> 
>         This issue has been noted to affect 5.19 kernels as well. A
>         patch set
>         from 5.15.y has been used as a guide for which cherry
>         picks to commit.
> 
>         ------------------------------------------------------------------------
> 
>         The following changes since commit
>         78d54428f16c98b741b3190f1c3f6b0ef0430b3e:
> 
>             UBUNTU: Ubuntu-5.19.0-39.40 (2023-03-21 09:35:41 -0700)
> 
>         are available in the Git repository at:
> 
>           
>           git://git.launchpad.net/~timg-tpi/ubuntu/+source/linux/+git/kinetic <http://git.launchpad.net/~timg-tpi/ubuntu/+source/linux/+git/kinetic>
>         lp2003816
> 
>         for you to fetch changes up to
>         4b2b6db116cb58b1f0b03db33063e74a72771c49:
> 
>             ext4: fix corrupt backup group descriptors after online resize
>         (2023-03-22 10:32:43 -0600)
> 
>         ----------------------------------------------------------------
>         Baokun Li (3):
>                 ext4: fix bad checksum after online resize
>                 ext4: fix corruption when online resizing a 1K bigalloc fs
>                 ext4: fix corrupt backup group descriptors after online
>         resize
> 
>            fs/ext4/resize.c | 32 ++++++++++++++++++++------------
>            1 file changed, 20 insertions(+), 12 deletions(-)
>         -- 
>         -----------
>         Tim Gardner
>         Canonical, Inc
> 
>         -- 
>         kernel-team mailing list
>         kernel-team at lists.ubuntu.com <mailto:kernel-team at lists.ubuntu.com>
>         https://lists.ubuntu.com/mailman/listinfo/kernel-team
>         <https://lists.ubuntu.com/mailman/listinfo/kernel-team>
> 

-- 
-----------
Tim Gardner
Canonical, Inc