From patchwork Tue Mar 22 14:13:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 12788509 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 95BBDC4321E for ; Tue, 22 Mar 2022 14:16:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237607AbiCVORc (ORCPT ); Tue, 22 Mar 2022 10:17:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237314AbiCVOQL (ORCPT ); Tue, 22 Mar 2022 10:16:11 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8D16089CC3; Tue, 22 Mar 2022 07:14:11 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 1E382CE1E18; Tue, 22 Mar 2022 14:14:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B69BCC36AFA; Tue, 22 Mar 2022 14:14:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1647958446; bh=k6YGRIdB4dcCELFakmu2rMsXHeruz8T3YwyGiVlLrAY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mjK8KTiV8IxKRktmdu1YZwYnCJdt7EL27HQsvO+etVbqJvDVtLFP4AlDjiYSR7Q8I LfeW0108gsMQT/2OD3Ivo+wnb/Sg1QIZN8AvN6tcBXSrwiLZq4oELoPf4BYkj0pvxX ZpkBSvt9e7KuFkWH3eg/do86FgaBLu36NO3CA3/HAOnW0bCuTEdKMQJR2ae6TLQzXh lBU6+2D15JnHjKNKR6GzQuTzXr7+tu1fQTPb297SzdiiIJwgac4sxGKpSK5AJcHIa4 zfiInJkmv8VG91M+10pi7L2LFaTab/4QfJ/K9z2UONgN/8mvE3xskeaf7Q9OfAWb/w r0hBbrceQKKxg== From: Jeff Layton To: idryomov@gmail.com, xiubli@redhat.com Cc: ceph-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-kernel@vger.kernel.org, lhenriques@suse.de Subject: [RFC PATCH v11 50/51] ceph: add encryption support to writepage Date: Tue, 22 Mar 2022 10:13:15 -0400 Message-Id: <20220322141316.41325-51-jlayton@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220322141316.41325-1-jlayton@kernel.org> References: <20220322141316.41325-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org Allow writepage to issue encrypted writes. Extend out the requested size and offset to cover complete blocks, and then encrypt and write them to the OSDs. Signed-off-by: Jeff Layton --- fs/ceph/addr.c | 34 +++++++++++++++++++++++++++------- 1 file changed, 27 insertions(+), 7 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 13a37a568a1d..403e7a960a4e 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -594,10 +594,12 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc) loff_t page_off = page_offset(page); int err; loff_t len = thp_size(page); + loff_t wlen; struct ceph_writeback_ctl ceph_wbc; struct ceph_osd_client *osdc = &fsc->client->osdc; struct ceph_osd_request *req; bool caching = ceph_is_cache_enabled(inode); + struct page *bounce_page = NULL; dout("writepage %p idx %lu\n", page, page->index); @@ -628,6 +630,8 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc) if (ceph_wbc.i_size < page_off + len) len = ceph_wbc.i_size - page_off; + if (IS_ENCRYPTED(inode)) + wlen = round_up(len, CEPH_FSCRYPT_BLOCK_SIZE); dout("writepage %p page %p index %lu on %llu~%llu snapc %p seq %lld\n", inode, page, page->index, page_off, len, snapc, snapc->seq); @@ -636,22 +640,37 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc) CONGESTION_ON_THRESH(fsc->mount_options->congestion_kb)) set_bdi_congested(inode_to_bdi(inode), BLK_RW_ASYNC); - req = ceph_osdc_new_request(osdc, &ci->i_layout, ceph_vino(inode), page_off, &len, 0, 1, - CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, snapc, - ceph_wbc.truncate_seq, ceph_wbc.truncate_size, - true); + req = ceph_osdc_new_request(osdc, &ci->i_layout, ceph_vino(inode), + page_off, &wlen, 0, 1, CEPH_OSD_OP_WRITE, + CEPH_OSD_FLAG_WRITE, snapc, + ceph_wbc.truncate_seq, + ceph_wbc.truncate_size, true); if (IS_ERR(req)) return PTR_ERR(req); + if (wlen < len) + len = wlen; + set_page_writeback(page); if (caching) ceph_set_page_fscache(page); ceph_fscache_write_to_cache(inode, page_off, len, caching); + if (IS_ENCRYPTED(inode)) { + bounce_page = fscrypt_encrypt_pagecache_blocks(page, CEPH_FSCRYPT_BLOCK_SIZE, + 0, GFP_NOFS); + if (IS_ERR(bounce_page)) { + err = PTR_ERR(bounce_page); + goto out; + } + } /* it may be a short write due to an object boundary */ WARN_ON_ONCE(len > thp_size(page)); - osd_req_op_extent_osd_data_pages(req, 0, &page, len, 0, false, false); - dout("writepage %llu~%llu (%llu bytes)\n", page_off, len, len); + osd_req_op_extent_osd_data_pages(req, 0, + bounce_page ? &bounce_page : &page, wlen, 0, + false, false); + dout("writepage %llu~%llu (%llu bytes, %sencrypted)\n", + page_off, len, wlen, IS_ENCRYPTED(inode) ? "" : "not "); req->r_mtime = inode->i_mtime; err = ceph_osdc_start_request(osdc, req, true); @@ -660,7 +679,8 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc) ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, req->r_end_latency, len, err); - + fscrypt_free_bounce_page(bounce_page); +out: ceph_osdc_put_request(req); if (err == 0) err = len;