From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81ABEC04A6B for ; Fri, 10 May 2019 11:16:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5F43220989 for ; Fri, 10 May 2019 11:16:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727238AbfEJLPx (ORCPT ); Fri, 10 May 2019 07:15:53 -0400 Received: from mx2.suse.de ([195.135.220.15]:50516 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727225AbfEJLPx (ORCPT ); Fri, 10 May 2019 07:15:53 -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 10B02AF79 for ; Fri, 10 May 2019 11:15:52 +0000 (UTC) From: Johannes Thumshirn To: David Sterba Cc: Linux BTRFS Mailinglist , Johannes Thumshirn Subject: [PATCH 00/17] Add support for SHA-256 checksums Date: Fri, 10 May 2019 13:15:30 +0200 Message-Id: <20190510111547.15310-1-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 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") Patches 1 - 16 are preparation patches to make the change of the checksum algorithm easy and patch 17 then finally adds SHA-256 as a new checksum algorithm. Only patch 17/17 is dependent on mkfs changes. Johannes Thumshirn (17): btrfs: use btrfs_csum_data() instead of directly calling crc32c btrfs: resurrect btrfs_crc32c() btrfs: use btrfs_crc32c() instead of btrfs_extref_hash() btrfs: use btrfs_crc32c() instead of btrfs_name_hash() btrfs: don't assume ordered sums to be 4 bytes btrfs: dont assume compressed_bio sums to be 4 bytes btrfs: use btrfs_crc32c{,_final}() in for free space cache 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: pass in an fs_info to btrfs_csum_{data,final}() btrfs: directly call into crypto framework for checsumming btrfs: remove assumption about csum type form btrfs_csum_{data,final}() btrfs: remove assumption about csum type form btrfs_print_data_csum_error() btrfs: add sha256 as another checksum algorithm fs/btrfs/btrfs_inode.h | 33 ++++++-- fs/btrfs/check-integrity.c | 6 +- fs/btrfs/compression.c | 34 +++++---- fs/btrfs/compression.h | 2 +- fs/btrfs/ctree.h | 30 +++++--- fs/btrfs/dir-item.c | 10 +-- fs/btrfs/disk-io.c | 164 +++++++++++++++++++++++++++++----------- fs/btrfs/disk-io.h | 5 +- fs/btrfs/extent-tree.c | 6 +- fs/btrfs/file-item.c | 35 ++++----- fs/btrfs/free-space-cache.c | 10 +-- fs/btrfs/inode-item.c | 6 +- fs/btrfs/inode.c | 21 +++-- fs/btrfs/ordered-data.c | 13 ++-- fs/btrfs/ordered-data.h | 4 +- fs/btrfs/props.c | 5 +- fs/btrfs/scrub.c | 22 +++--- fs/btrfs/send.c | 5 +- fs/btrfs/tree-checker.c | 3 +- fs/btrfs/tree-log.c | 6 +- include/uapi/linux/btrfs_tree.h | 1 + 21 files changed, 276 insertions(+), 145 deletions(-) -- 2.16.4