From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 73701FBE7 for ; Mon, 15 May 2023 16:45:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9DEDAC433D2; Mon, 15 May 2023 16:45:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684169111; bh=g8BMzhcJNXK5QrHGmQXQYjtFdSsHQ85iZ/Ksz0VZWUE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rD6qQVUrFbshDYol/PL2aA0B+QUVCNoFidMN3qtUZg2u9QCPCx6e5iPLxKcwf4qme FogFxIXiaOLV8B3ZiMvvWzlCIViNhlMkyW0iuk3elv+cLtqz913mjsPa/IwfZKllRc 7O/x6Dv6FzsBV2izRaDvchcCVZw1y/jbQ2N3/ic0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sami Tolvanen , Akilesh Kailash , Mike Snitzer , Sasha Levin Subject: [PATCH 4.19 145/191] dm verity: skip redundant verity_handle_err() on I/O errors Date: Mon, 15 May 2023 18:26:22 +0200 Message-Id: <20230515161712.684342096@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230515161707.203549282@linuxfoundation.org> References: <20230515161707.203549282@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Akilesh Kailash [ Upstream commit 2c0468e054c0adb660ac055fc396622ec7235df9 ] Without FEC, dm-verity won't call verity_handle_err() when I/O fails, but with FEC enabled, it currently does even if an I/O error has occurred. If there is an I/O error and FEC correction fails, return the error instead of calling verity_handle_err() again. Suggested-by: Sami Tolvanen Signed-off-by: Akilesh Kailash Reviewed-by: Sami Tolvanen Signed-off-by: Mike Snitzer Stable-dep-of: e8c5d45f82ce ("dm verity: fix error handling for check_at_most_once on FEC") Signed-off-by: Sasha Levin --- drivers/md/dm-verity-target.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index 36945030520a9..08a135f7ef431 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -471,6 +471,7 @@ static int verity_verify_io(struct dm_verity_io *io) struct bvec_iter start; unsigned b; struct crypto_wait wait; + struct bio *bio = dm_bio_from_per_bio_data(io, v->ti->per_io_data_size); for (b = 0; b < io->n_blocks; b++) { int r; @@ -525,9 +526,17 @@ static int verity_verify_io(struct dm_verity_io *io) else if (verity_fec_decode(v, io, DM_VERITY_BLOCK_TYPE_DATA, cur_block, NULL, &start) == 0) continue; - else if (verity_handle_err(v, DM_VERITY_BLOCK_TYPE_DATA, - cur_block)) - return -EIO; + else { + if (bio->bi_status) { + /* + * Error correction failed; Just return error + */ + return -EIO; + } + if (verity_handle_err(v, DM_VERITY_BLOCK_TYPE_DATA, + cur_block)) + return -EIO; + } } return 0; -- 2.39.2