From patchwork Mon Jun 3 14:58:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 10973001 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 35B511515 for ; Mon, 3 Jun 2019 14:59:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 26F74205A9 for ; Mon, 3 Jun 2019 14:59:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1B20A286EE; Mon, 3 Jun 2019 14:59:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AD3AE205A9 for ; Mon, 3 Jun 2019 14:59:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729353AbfFCO7E (ORCPT ); Mon, 3 Jun 2019 10:59:04 -0400 Received: from mx2.suse.de ([195.135.220.15]:60938 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729123AbfFCO7D (ORCPT ); Mon, 3 Jun 2019 10:59:03 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 758EFACD4; Mon, 3 Jun 2019 14:59:02 +0000 (UTC) From: Johannes Thumshirn To: David Sterba Cc: Linux BTRFS Mailinglist , Chris Mason , Richard Weinberger , David Gstir , Nikolay Borisov , Johannes Thumshirn Subject: [PATCH v4 00/13] Add support for other checksums Date: Mon, 3 Jun 2019 16:58:46 +0200 Message-Id: <20190603145859.7176-1-jthumshirn@suse.de> X-Mailer: git-send-email 2.16.4 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patchset add support for adding new checksum types in BTRFS. Currently BTRFS only supports CRC32C as data and metadata checksum, which is good if you only want to detect errors due to data corruption in hardware. But CRC32C isn't able cover other use-cases like de-duplication or cryptographically save data integrity guarantees. The following properties made SHA-256 interesting for these use-cases: - Still considered cryptographically sound - Reasonably well understood by the security industry - Result fits into the 32Byte/256Bit we have for the checksum in the on-disk format - Small enough collision space to make it feasible for data de-duplication - Fast enough to calculate and offloadable to crypto hardware via the kernel's crypto_shash framework. The patchset also provides mechanisms for plumbing in different hash algorithms relatively easy. Unfortunately this patchset also partially reverts commit: 9678c54388b6 ("btrfs: Remove custom crc32c init code") This is an intermediate submission, as a) mkfs.btrfs support is still missing and b) David requested to have three hash algorithms, where 1 is crc32c, one cryptographically secure and one in between. A changelog can be found directly in the patches. The branch is also available on a gitweb at https://git.kernel.org/pub/scm/linux/kernel/git/jth/linux.git/log/?h=btrfs-csum-rework.v4 Johannes Thumshirn (13): btrfs: use btrfs_csum_data() instead of directly calling crc32c btrfs: resurrect btrfs_crc32c() btrfs: use btrfs_crc32c{,_final}() in for free space cache btrfs: don't assume ordered sums to be 4 bytes btrfs: dont assume compressed_bio sums to be 4 bytes btrfs: format checksums according to type for printing btrfs: add common checksum type validation btrfs: check for supported superblock checksum type before checksum validation btrfs: Simplify btrfs_check_super_csum() and get rid of size assumptions btrfs: add boilerplate code for directly including the crypto framework btrfs: directly call into crypto framework for checsumming btrfs: remove assumption about csum type form btrfs_print_data_csum_error() btrfs: add sha256 as another checksum algorithm fs/btrfs/Kconfig | 4 +- fs/btrfs/btrfs_inode.h | 20 ++++-- fs/btrfs/check-integrity.c | 12 ++-- fs/btrfs/compression.c | 40 +++++++---- fs/btrfs/compression.h | 2 +- fs/btrfs/ctree.h | 27 +++++++- fs/btrfs/disk-io.c | 146 ++++++++++++++++++++++++++-------------- fs/btrfs/disk-io.h | 2 - fs/btrfs/extent-tree.c | 6 +- fs/btrfs/file-item.c | 44 +++++++----- fs/btrfs/free-space-cache.c | 10 ++- fs/btrfs/inode.c | 20 ++++-- fs/btrfs/ordered-data.c | 10 +-- fs/btrfs/ordered-data.h | 4 +- fs/btrfs/scrub.c | 38 ++++++++--- fs/btrfs/send.c | 2 +- fs/btrfs/super.c | 2 + include/uapi/linux/btrfs_tree.h | 6 +- 18 files changed, 266 insertions(+), 129 deletions(-)