From patchwork Fri Jul 17 01:45:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Satya Tangirala X-Patchwork-Id: 11668719 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 61651161F for ; Fri, 17 Jul 2020 01:45:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 49A6620838 for ; Fri, 17 Jul 2020 01:45:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="p36HscUc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726803AbgGQBpx (ORCPT ); Thu, 16 Jul 2020 21:45:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726593AbgGQBps (ORCPT ); Thu, 16 Jul 2020 21:45:48 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A669C08C5DB for ; Thu, 16 Jul 2020 18:45:48 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id m81so9523385ybf.6 for ; Thu, 16 Jul 2020 18:45:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=zp9IyNE/WOqMjmmUo5OQb7An9Jck4EABFW2ZtXIp0J8=; b=p36HscUchAg0CPB1IVlLAHSXs2vt/CAtvnGZGYh+pgGb8ff5pnVy92OpuvFkRtll4M SI5aSrhV3PxrLbwz17jamuLN6negVlYOyUO0lVR594tXatTmLzOco1s3uJGTt9G0c02T oGCMZyhVeE5Rx/Y4UrAqp28VHMbYuQav1xwBQCWuZUTwsEly/5H7VsNZS6EQ79Dy4jsm ylGUbOu6BuqAvds98BLPpY+r2Ujizq6ziG99s99QZJPq2K6KpQk33kIgRGXyAgj8CE8A e/8DA/xD/kOPAsUIfxdTPXOBYEdxznO4bFVFYb8uJoYP8nKKJ9E5RyrGSz68UIXgrnZx mu5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=zp9IyNE/WOqMjmmUo5OQb7An9Jck4EABFW2ZtXIp0J8=; b=rGAm9Zc2JddSn7c5J2be2NDxdEIYnt1Q3swrhLk3DOJoNWQxHcD4XCHCnq7P6bSoW6 qYXNFH8OgxASv+hnMGke7bJrn/tqcHcvMjlCDVxPBg9V1gI9T9HESUji14G4gxpuWHHA L2PPwlTgB7Ip+dwb52hZLPISc+ciMKdoiGAtIN5xkMYBiNrTsHZ6NifhN84CQALUONjx JlXYVYro2ovPCoRWQxP13L9h8Lcg5J7TIsOm3mX4ibkbsFkQLN6cq0+34MY+QB120e7M 8zn++B7eJL3ZZQYrwjOCi25+0C87ZvcbfW6DtBN/cWzcKzoERK9jsIS8dcNUq+5Qk1Iv vuuQ== X-Gm-Message-State: AOAM530jgaTdIqkWVxyD7CKIRiqbtMlDBawVDlEWWrZvFSL8wtaBAth7 u+webJn3+b5VmTD1zIdS6CO+Lo7S1f36/9M2n5fsWHf2Fi6HycB76ukAsPAWSAf0pY9xV3wv0g/ MT0nmMqmj82wdmLnS2psRVWoHGPgcWT5Jg7B8vOpD1ElBypIMn79E7aZhEtXz26QpV5TonvI= X-Google-Smtp-Source: ABdhPJzr5GCoe/5L+0bMuPjqymASle/2ldfXTMtsEz86fUAPPo0bs236xCphulrBw+iau6eQYoDrV+vdm10= X-Received: by 2002:a25:4c81:: with SMTP id z123mr10656827yba.309.1594950347400; Thu, 16 Jul 2020 18:45:47 -0700 (PDT) Date: Fri, 17 Jul 2020 01:45:35 +0000 In-Reply-To: <20200717014540.71515-1-satyat@google.com> Message-Id: <20200717014540.71515-3-satyat@google.com> Mime-Version: 1.0 References: <20200717014540.71515-1-satyat@google.com> X-Mailer: git-send-email 2.28.0.rc0.105.gf9edc3c819-goog Subject: [PATCH v3 2/7] direct-io: add support for fscrypt using blk-crypto From: Satya Tangirala To: linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-ext4@vger.kernel.org Cc: linux-xfs@vger.kernel.org, Eric Biggers , Satya Tangirala Sender: linux-fscrypt-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org From: Eric Biggers Set bio crypt contexts on bios by calling into fscrypt when required, and explicitly check for DUN continuity when adding pages to the bio. (While DUN continuity is usually implied by logical block contiguity, this is not the case when using certain fscrypt IV generation methods like IV_INO_LBLK_32). Signed-off-by: Eric Biggers Co-developed-by: Satya Tangirala Signed-off-by: Satya Tangirala --- fs/direct-io.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/fs/direct-io.c b/fs/direct-io.c index 6d5370eac2a8..f27f7e3780ee 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -411,6 +412,7 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio, sector_t first_sector, int nr_vecs) { struct bio *bio; + struct inode *inode = dio->inode; /* * bio_alloc() is guaranteed to return a bio when allowed to sleep and @@ -418,6 +420,9 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio, */ bio = bio_alloc(GFP_KERNEL, nr_vecs); + fscrypt_set_bio_crypt_ctx(bio, inode, + sdio->cur_page_fs_offset >> inode->i_blkbits, + GFP_KERNEL); bio_set_dev(bio, bdev); bio->bi_iter.bi_sector = first_sector; bio_set_op_attrs(bio, dio->op, dio->op_flags); @@ -782,9 +787,17 @@ static inline int dio_send_cur_page(struct dio *dio, struct dio_submit *sdio, * current logical offset in the file does not equal what would * be the next logical offset in the bio, submit the bio we * have. + * + * When fscrypt inline encryption is used, data unit number + * (DUN) contiguity is also required. Normally that's implied + * by logical contiguity. However, certain IV generation + * methods (e.g. IV_INO_LBLK_32) don't guarantee it. So, we + * must explicitly check fscrypt_mergeable_bio() too. */ if (sdio->final_block_in_bio != sdio->cur_page_block || - cur_offset != bio_next_offset) + cur_offset != bio_next_offset || + !fscrypt_mergeable_bio(sdio->bio, dio->inode, + cur_offset >> dio->inode->i_blkbits)) dio_bio_submit(dio, sdio); }