Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Jan Kara <jack@suse.cz>
To:     Ted Tso <tytso@mit.edu>
Cc:     <linux-ext4@vger.kernel.org>, Eric Whitney <enwlinux@gmail.com>,
        <linux-fsdevel@vger.kernel.org>,
        "Darrick J . Wong" <djwong@kernel.org>, Jan Kara <jack@suse.cz>
Subject: [PATCH 0/3] ext4: Fix data corruption when extending DIO write races with buffered read
Date:   Mon, 12 Apr 2021 12:23:30 +0200
Message-Id: <20210412102333.2676-1-jack@suse.cz>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Hello,

This patch series fixes a bug manifesting as occasional generic/418 failure
when direct IO write extending a file races with buffered read. Patch 1
extends iomap DIO code to pass original IO size to ->end_dio handler so that
ext4 can tell whether everything has succeeded and we don't need expensive
DIO cleanup (possible truncate of leftover blocks beyond i_size). Patch 2
fixes the ext4 bug, patch 3 fixes unrelated problem I've found in ext4 DIO
code.

								Honza