[00/11] xfs_scrub: fix IO error detection during media verify

Message ID	156685499099.2841898.18430382226915450537.stgit@magnolia (mailing list archive)
Headers	show Return-Path: <SRS0=ZZxK=WW=vger.kernel.org=linux-xfs-owner@kernel.org> Subject: [PATCH 00/11] xfs_scrub: fix IO error detection during media verify From: "Darrick J. Wong" <darrick.wong@oracle.com> To: sandeen@sandeen.net, darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org Date: Mon, 26 Aug 2019 14:29:51 -0700 Message-ID: <156685499099.2841898.18430382226915450537.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk
Series	xfs_scrub: fix IO error detection during media verify \| expand [00/11] xfs_scrub: fix IO error detection during media verify [01/11] xfs_scrub: fix handling of read-verify pool runtime errors [02/11] xfs_scrub: abort all read verification work immediately on error [03/11] xfs_scrub: fix read-verify pool error communication problems [04/11] xfs_scrub: fix queue-and-stash of non-contiguous verify requests [05/11] xfs_scrub: only call read_verify_force_io once per pool [06/11] xfs_scrub: refactor inode prefix rendering code [07/11] xfs_scrub: record disk LBA size [08/11] xfs_scrub: enforce read verify pool minimum io size [09/11] xfs_scrub: return bytes verified from a SCSI VERIFY command [10/11] xfs_scrub: fix read verify disk error handling strategy [11/11] xfs_scrub: simulate errors in the read-verify phase

Message ID

156685499099.2841898.18430382226915450537.stgit@magnolia (mailing list archive)

Headers

Subject: [PATCH 00/11] xfs_scrub: fix IO error detection during media verify
From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: sandeen@sandeen.net, darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org
Date: Mon, 26 Aug 2019 14:29:51 -0700
Message-ID: <156685499099.2841898.18430382226915450537.stgit@magnolia>
User-Agent: StGit/0.17.1-dirty
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Sender: linux-xfs-owner@vger.kernel.org
Precedence: bulk

Series

xfs_scrub: fix IO error detection during media verify | expand

Message

Darrick J. Wong Aug. 26, 2019, 9:29 p.m. UTC

Hi all,

The existing scrub media scan code (phase 6) has a lot of problems
dealing with errors.  It treats runtime errors (e.g. ENOMEM) as disk
errors, it fails to handle short reads properly, it reports entire
extents as failed when the read returns EIO instead of single-stepping
filesystem blocks to find the bad ones, and there's no good way to test
that it works.

This series fixes each of those problems and adds a couple of debugging
knobs so that we can simulate disk errors and short reads to make sure
that the media scan code actually detects media errors correctly.

If you're going to start using this mess, you probably ought to just
pull from my git trees, which are linked below.

This is an extraordinary way to destroy everything.  Enjoy!
Comments and questions are, as always, welcome.

--D

xfsprogs git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=scrub-media-error-detection