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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> (raw)

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

             reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12 10:23 Jan Kara [this message]
2021-04-12 10:23 ` [PATCH 1/3] iomap: Pass original DIO size to completion handler Jan Kara
2021-04-12 14:07   ` kernel test robot
2021-04-12 14:12   ` kernel test robot
2021-04-12 16:37   ` kernel test robot
2021-04-12 10:23 ` [PATCH 2/3] ext4: Fix occasional generic/418 failure Jan Kara
2021-04-12 21:50   ` Dave Chinner
2021-04-13  9:11     ` Jan Kara
2021-04-13 22:45       ` Dave Chinner
2021-04-14 11:56         ` Jan Kara
2021-04-12 10:23 ` [PATCH 3/3] ext4: Fix overflow in ext4_iomap_alloc() Jan Kara
2021-04-12 11:30   ` Matthew Wilcox
2021-06-16 12:22   ` Theodore Ts'o

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