From patchwork Tue Aug 8 17:08:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sweet Tea Dorminy X-Patchwork-Id: 13346619 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DEA5C001DB for ; Tue, 8 Aug 2023 18:08:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234885AbjHHSIH (ORCPT ); Tue, 8 Aug 2023 14:08:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235139AbjHHSH3 (ORCPT ); Tue, 8 Aug 2023 14:07:29 -0400 Received: from box.fidei.email (box.fidei.email [71.19.144.250]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF509634BF; Tue, 8 Aug 2023 10:08:41 -0700 (PDT) Received: from authenticated-user (box.fidei.email [71.19.144.250]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by box.fidei.email (Postfix) with ESMTPSA id 4B3DE83541; Tue, 8 Aug 2023 13:08:41 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=dorminy.me; s=mail; t=1691514521; bh=g0eXmZcoXvxtrVNAt/UKWZ1mLGPNmRYMaDnrl33ag0o=; h=From:To:Cc:Subject:Date:From; b=RxoklI+gUJ9F0/XMjT53dwRnaIVPriV+naexFdDujX7kZwhnCofZJYtEw2M7jrd7d kshvhJYUgO7ucWmRXfCW/qFOYL0jzumsVLyZyCfy2awOmalhfWe1Y4r8e9hYKAK3RQ qipRnhdQG4MzMohKWXl/Rl3UspJT89omJtCyVcFjuOhT7F5tJIAThZCsiTKNMTbCey 4bOMRsVkbIthcjuey5yeV0Xu7HQzmgJIa4YXA2RjYYhhaRpOJZsLJJSG67IwrPu8Hv PMBxhdlwWVYzPcarIQ8/Yes/u4F+AkyYQG9s9rZTe6Vq0u/ZT/jJ9ttqZB3KLx6hzf rPdFY0ra5aXNw== From: Sweet Tea Dorminy To: Chris Mason , Josef Bacik , David Sterba , "Theodore Y . Ts'o" , Jaegeuk Kim , kernel-team@meta.com, linux-btrfs@vger.kernel.org, linux-fscrypt@vger.kernel.org, Eric Biggers Cc: Sweet Tea Dorminy Subject: [PATCH v3 00/16] fscrypt: add extent encryption Date: Tue, 8 Aug 2023 13:08:17 -0400 Message-ID: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org This changeset adds extent-based data encryption to fscrypt. Some filesystems need to encrypt data based on extents, rather than on inodes, due to features incompatible with inode-based encryption. For instance, btrfs can have multiple inodes referencing a single block of data, and moves logical data blocks to different physical locations on disk in the background. As per discussion last year in [1] and later in [2], we would like to allow the use of fscrypt with btrfs, with authenticated encryption. This is the first step of that work, adding extent-based encryption to fscrypt; authenticated encryption is the next step. Extent-based encryption should be usable by other filesystems which wish to support snapshotting or background data rearrangement also, but btrfs is the first user. This changeset requires extent encryption to use inlinecrypt, as discussed previously. This applies atop [3], which itself is based on kdave/misc-next. It passes encryption fstests with suitable changes to btrfs-progs. Changelog: v3: - Added four additional changes: - soft-deleting keys that extent infos might later need to use, so the behavior of an open file after key removal matches inode-based fscrypt. - a set of changes to allow asynchronous info freeing for extents, necessary due to locking constraints in btrfs. v2: - https://lore.kernel.org/linux-fscrypt/cover.1688927487.git.sweettea-kernel@dorminy.me/T/#t [1] https://docs.google.com/document/d/1janjxewlewtVPqctkWOjSa7OhCgB8Gdx7iDaCDQQNZA/edit?usp=sharing [2] https://lore.kernel.org/linux-fscrypt/80496cfe-161d-fb0d-8230-93818b966b1b@dorminy.me/T/#t [3] https://lore.kernel.org/linux-fscrypt/cover.1691505830.git.sweettea-kernel@dorminy.me/ Sweet Tea Dorminy (16): fscrypt: factor helper for locking master key fscrypt: factor getting info for a specific block fscrypt: adjust effective lblks based on extents fscrypt: add a super_block pointer to fscrypt_info fscrypt: setup leaf inodes for extent encryption fscrypt: allow infos to be owned by extents fscrypt: use an optional ino equivalent for per-extent infos fscrypt: move function call warning of busy inodes fscrypt: revamp key removal for extent encryption fscrypt: add creation/usage/freeing of per-extent infos fscrypt: allow load/save of extent contexts fscrypt: save session key credentials for extent infos fscrypt: allow multiple extents to reference one info fscrypt: cache list of inlinecrypt devices fscrypt: allow asynchronous info freeing fscrypt: update documentation for per-extent keys Documentation/filesystems/fscrypt.rst | 43 +++- fs/crypto/crypto.c | 6 +- fs/crypto/fscrypt_private.h | 158 +++++++++++- fs/crypto/inline_crypt.c | 49 ++-- fs/crypto/keyring.c | 78 +++--- fs/crypto/keysetup.c | 336 ++++++++++++++++++++++---- fs/crypto/keysetup_v1.c | 10 +- fs/crypto/policy.c | 20 ++ include/linux/fscrypt.h | 67 +++++ 9 files changed, 654 insertions(+), 113 deletions(-) base-commit: 54d2161835d828a9663f548f61d1d9c3d3482122 prerequisite-patch-id: 2f1424d04bb5a76abf0ecf2c9cd8426d300078ae prerequisite-patch-id: ab342a72cf967dadfb8bec1320c5906fd3c6800f prerequisite-patch-id: ced2a9dab36539f55c14cd74a28950087c475ff2 prerequisite-patch-id: d4f1a64c994c2fa0d2d4cab83f9ddff52f0622e9 prerequisite-patch-id: 1af0fc98277159b31c26bc5751663efc0d322d75 prerequisite-patch-id: 3b21b62208587486cf9b31618f7c3bc875362f1a prerequisite-patch-id: c43d693f5b7c498a876d9ffcfc49c11a8ca93d80 prerequisite-patch-id: f120bde1cf47fbef1d9f8fd09cdcccc1408c3ff4 prerequisite-patch-id: c6a1f087d4a67b928b9c6af04e00310bfa74ace1 Reviewed-by: Josef Bacik