From patchwork Sun Jul 24 00:53:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sweet Tea Dorminy X-Patchwork-Id: 12927395 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 5CDE5CCA48A for ; Sun, 24 Jul 2022 00:54:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239248AbiGXAyg (ORCPT ); Sat, 23 Jul 2022 20:54:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239230AbiGXAye (ORCPT ); Sat, 23 Jul 2022 20:54:34 -0400 Received: from box.fidei.email (box.fidei.email [71.19.144.250]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A3E614D3B; Sat, 23 Jul 2022 17:54:33 -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 B0E6480BB8; Sat, 23 Jul 2022 20:54:32 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=dorminy.me; s=mail; t=1658624073; bh=Tcq2bnL7jZeUTtV/zMFhKPN5qxzKJGbsGbjP0h8/bsY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B8bzyEJRbAWDO1uvBY5yJtfbqFa1tmoqO6UFGhYgjgVoyD/FL+vCW2ApvTejiCiZb 5tNZ6UYFcXh2oG2lVGay3k5f5Ag5KZG2i1u9JZeGEx2ZOIBJN0bopsGeaXii33hp/v rF9oHMUR0p3moTLLx25mV2R4F5WSgbSrQMgeDckzn2tO7DQ0Tajp2KUmozcrwOrJxk XOE3/XbZGZ0j17ooXNLYpk4sYosNhWwnlQkMH4+RawV9O7JYfjWrZFCRIMfYn/VnNT s3haCRBrAXeT1HZfOffz552znBiF5GwrVejUdJ/9n4z8e8iulIDfANp43P8pJoFprr 2lyZSbrx6z71Q== From: Sweet Tea Dorminy To: Chris Mason , Josef Bacik , David Sterba , linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, osandov@osandov.com, kernel-team@fb.com Cc: Sweet Tea Dorminy Subject: [PATCH RFC v2 05/16] btrfs: disable various operations on encrypted inodes Date: Sat, 23 Jul 2022 20:53:50 -0400 Message-Id: <58760cc4416ca2e3903c962cc02b9bc4a251a0e9.1658623319.git.sweettea-kernel@dorminy.me> In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Omar Sandoval Initially, only normal data extents, using the normal (non-direct) IO path, will be encrypted. This change forbids various other bits: - allows reflinking only if both inodes have the same encryption status - disables compressing encrypted inodes - disables direct IO on encrypted inodes - disable inline data on encrypted inodes Signed-off-by: Omar Sandoval Signed-off-by: Sweet Tea Dorminy --- fs/btrfs/btrfs_inode.h | 3 +++ fs/btrfs/file.c | 4 ++-- fs/btrfs/inode.c | 3 ++- fs/btrfs/reflink.c | 7 +++++++ 4 files changed, 14 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index b160b8e124e0..ff668686717b 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -400,6 +400,9 @@ static inline bool btrfs_inode_in_log(struct btrfs_inode *inode, u64 generation) */ static inline bool btrfs_inode_can_compress(const struct btrfs_inode *inode) { + if (IS_ENCRYPTED(&inode->vfs_inode)) + return false; + if (inode->flags & BTRFS_INODE_NODATACOW || inode->flags & BTRFS_INODE_NODATASUM) return false; diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index d199275adfa4..1fa0fe9f122f 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1896,7 +1896,7 @@ static ssize_t btrfs_direct_write(struct kiocb *iocb, struct iov_iter *from) goto relock; } - if (check_direct_IO(fs_info, from, pos)) { + if (IS_ENCRYPTED(inode) || check_direct_IO(fs_info, from, pos)) { btrfs_inode_unlock(inode, ilock_flags); goto buffered; } @@ -3743,7 +3743,7 @@ static ssize_t btrfs_direct_read(struct kiocb *iocb, struct iov_iter *to) ssize_t read = 0; ssize_t ret; - if (fsverity_active(inode)) + if (IS_ENCRYPTED(inode) || fsverity_active(inode)) return 0; if (check_direct_read(btrfs_sb(inode->i_sb), to, iocb->ki_pos)) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 12381c87177e..2faa0ddfedf9 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -409,7 +409,8 @@ static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 size, * compressed) data fits in a leaf and the configured maximum inline * size. */ - if (size < i_size_read(&inode->vfs_inode) || + if (IS_ENCRYPTED(&inode->vfs_inode) || + size < i_size_read(&inode->vfs_inode) || size > fs_info->sectorsize || data_len > BTRFS_MAX_INLINE_DATA_SIZE(fs_info) || data_len > fs_info->max_inline) diff --git a/fs/btrfs/reflink.c b/fs/btrfs/reflink.c index 9acf47b11fe6..d22086e1cbc8 100644 --- a/fs/btrfs/reflink.c +++ b/fs/btrfs/reflink.c @@ -805,6 +805,13 @@ static int btrfs_remap_file_range_prep(struct file *file_in, loff_t pos_in, ASSERT(inode_in->i_sb == inode_out->i_sb); } + /* + * Can only reflink encrypted files if both files are encrypted. + */ + if (!fscrypt_have_same_policy(inode_in, inode_out)) { + return -EINVAL; + } + /* Don't make the dst file partly checksummed */ if ((BTRFS_I(inode_in)->flags & BTRFS_INODE_NODATASUM) != (BTRFS_I(inode_out)->flags & BTRFS_INODE_NODATASUM)) {