From patchwork Tue Apr 25 18:20:55 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 9699051 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 348736020A for ; Tue, 25 Apr 2017 18:23:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 254FA2041F for ; Tue, 25 Apr 2017 18:23:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 190BB2845E; Tue, 25 Apr 2017 18:23:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C06762041F for ; Tue, 25 Apr 2017 18:23:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1952449AbdDYSVa (ORCPT ); Tue, 25 Apr 2017 14:21:30 -0400 Received: from ale.deltatee.com ([207.54.116.67]:49713 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1951844AbdDYSVV (ORCPT ); Tue, 25 Apr 2017 14:21:21 -0400 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1d355M-0004KP-1i; Tue, 25 Apr 2017 12:21:15 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.84_2) (envelope-from ) id 1d355M-0005sO-RA; Tue, 25 Apr 2017 12:21:12 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-nvdimm@lists.01.org, linux-scsi@vger.kernel.org, open-iscsi@googlegroups.com, megaraidlinux.pdl@broadcom.com, sparmaintainer@unisys.com, devel@driverdev.osuosl.org, target-devel@vger.kernel.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, dm-devel@redhat.com Cc: Christoph Hellwig , "Martin K. Petersen" , "James E.J. Bottomley" , Jens Axboe , Greg Kroah-Hartman , Dan Williams , Ross Zwisler , Matthew Wilcox , Sumit Semwal , Stephen Bates , Logan Gunthorpe , Alasdair Kergon , Mike Snitzer Date: Tue, 25 Apr 2017 12:20:55 -0600 Message-Id: <1493144468-22493-9-git-send-email-logang@deltatee.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1493144468-22493-1-git-send-email-logang@deltatee.com> References: <1493144468-22493-1-git-send-email-logang@deltatee.com> X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-nvdimm@lists.01.org, open-iscsi@googlegroups.com, megaraidlinux.pdl@broadcom.com, sparmaintainer@unisys.com, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-media@vger.kernel.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org, hch@lst.de, martin.petersen@oracle.com, jejb@linux.vnet.ibm.com, axboe@kernel.dk, gregkh@linuxfoundation.org, dan.j.williams@intel.com, ross.zwisler@linux.intel.com, mawilcox@microsoft.com, sumit.semwal@linaro.org, sbates@raithlin.com, logang@deltatee.com, dm-devel@redhat.com, agk@redhat.com, snitzer@redhat.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v2 08/21] dm-crypt: Make use of the new sg_map helper in 4 call sites X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Very straightforward conversion to the new function in all four spots. Signed-off-by: Logan Gunthorpe Cc: Alasdair Kergon Cc: Mike Snitzer --- drivers/md/dm-crypt.c | 39 ++++++++++++++++++++++++++------------- 1 file changed, 26 insertions(+), 13 deletions(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 8dbecf1..841f1fc 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -635,9 +635,12 @@ static int crypt_iv_lmk_gen(struct crypt_config *cc, u8 *iv, if (bio_data_dir(dmreq->ctx->bio_in) == WRITE) { sg = crypt_get_sg_data(cc, dmreq->sg_in); - src = kmap_atomic(sg_page(sg)); - r = crypt_iv_lmk_one(cc, iv, dmreq, src + sg->offset); - kunmap_atomic(src); + src = sg_map(sg, 0, SG_KMAP_ATOMIC); + if (IS_ERR(src)) + return PTR_ERR(src); + + r = crypt_iv_lmk_one(cc, iv, dmreq, src); + sg_unmap(sg, src, 0, SG_KMAP_ATOMIC); } else memset(iv, 0, cc->iv_size); @@ -655,14 +658,18 @@ static int crypt_iv_lmk_post(struct crypt_config *cc, u8 *iv, return 0; sg = crypt_get_sg_data(cc, dmreq->sg_out); - dst = kmap_atomic(sg_page(sg)); - r = crypt_iv_lmk_one(cc, iv, dmreq, dst + sg->offset); + dst = sg_map(sg, 0, SG_KMAP_ATOMIC); + if (IS_ERR(dst)) + return PTR_ERR(dst); + + r = crypt_iv_lmk_one(cc, iv, dmreq, dst); /* Tweak the first block of plaintext sector */ if (!r) - crypto_xor(dst + sg->offset, iv, cc->iv_size); + crypto_xor(dst, iv, cc->iv_size); + + sg_unmap(sg, dst, 0, SG_KMAP_ATOMIC); - kunmap_atomic(dst); return r; } @@ -786,9 +793,12 @@ static int crypt_iv_tcw_gen(struct crypt_config *cc, u8 *iv, /* Remove whitening from ciphertext */ if (bio_data_dir(dmreq->ctx->bio_in) != WRITE) { sg = crypt_get_sg_data(cc, dmreq->sg_in); - src = kmap_atomic(sg_page(sg)); - r = crypt_iv_tcw_whitening(cc, dmreq, src + sg->offset); - kunmap_atomic(src); + src = sg_map(sg, 0, SG_KMAP_ATOMIC); + if (IS_ERR(src)) + return PTR_ERR(src); + + r = crypt_iv_tcw_whitening(cc, dmreq, src); + sg_unmap(sg, src, 0, SG_KMAP_ATOMIC); } /* Calculate IV */ @@ -812,9 +822,12 @@ static int crypt_iv_tcw_post(struct crypt_config *cc, u8 *iv, /* Apply whitening on ciphertext */ sg = crypt_get_sg_data(cc, dmreq->sg_out); - dst = kmap_atomic(sg_page(sg)); - r = crypt_iv_tcw_whitening(cc, dmreq, dst + sg->offset); - kunmap_atomic(dst); + dst = sg_map(sg, 0, SG_KMAP_ATOMIC); + if (IS_ERR(dst)) + return PTR_ERR(dst); + + r = crypt_iv_tcw_whitening(cc, dmreq, dst); + sg_unmap(sg, dst, 0, SG_KMAP_ATOMIC); return r; }