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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 12 Apr 2019 18:11:02 +0100 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x3CHB16X24051934 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 12 Apr 2019 17:11:01 GMT Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 48EAD6A051; Fri, 12 Apr 2019 17:11:01 +0000 (GMT) Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CF54E6A05D; Fri, 12 Apr 2019 17:10:57 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.82.25]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP; Fri, 12 Apr 2019 17:10:57 +0000 (GMT) From: Chandan Rajendra To: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fscrypt@vger.kernel.org Cc: Chandan Rajendra , tytso@mit.edu, adilger.kernel@dilger.ca, ebiggers@kernel.org, jaegeuk@kernel.org, yuchao0@huawei.com Subject: [RFC PATCH 12/14] ext4: Compute logical block and the page range to be encrypted Date: Fri, 12 Apr 2019 22:40:39 +0530 X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190412171041.31995-1-chandan@linux.ibm.com> References: <20190412171041.31995-1-chandan@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 19041217-0004-0000-0000-000014FBFB33 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010914; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000284; SDB=6.01188096; UDB=6.00622386; IPR=6.00968863; MB=3.00026412; MTD=3.00000008; XFM=3.00000015; UTC=2019-04-12 17:11:04 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19041217-0005-0000-0000-00008B3C3066 Message-Id: <20190412171041.31995-13-chandan@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-04-12_10:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904120115 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org For subpage-sized blocks, the initial logical block number mapped by a page can be different from page->index. Hence this commit adds code to compute the first logical block mapped by the page and also the page range to be encrypted. Signed-off-by: Chandan Rajendra --- fs/ext4/page-io.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 3e9298e6a705..75485ee9e800 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -418,6 +418,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io, { struct page *data_page = NULL; struct inode *inode = page->mapping->host; + u64 page_blk; unsigned block_start; struct buffer_head *bh, *head; int ret = 0; @@ -478,10 +479,14 @@ int ext4_bio_write_page(struct ext4_io_submit *io, if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode) && nr_to_submit) { gfp_t gfp_flags = GFP_NOFS; + unsigned int page_bytes; + + page_bytes = round_up(len, i_blocksize(inode)); + page_blk = page->index << (PAGE_SHIFT - inode->i_blkbits); retry_encrypt: - data_page = fscrypt_encrypt_page(inode, page, PAGE_SIZE, 0, - page->index, gfp_flags); + data_page = fscrypt_encrypt_page(inode, page, page_bytes, 0, + page_blk, gfp_flags); if (IS_ERR(data_page)) { ret = PTR_ERR(data_page); if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) { -- 2.19.1