From patchwork Sun Sep 8 15:26:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Max Gurtovoy X-Patchwork-Id: 11136969 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 DA7DC1395 for ; Sun, 8 Sep 2019 15:26:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF541218AE for ; Sun, 8 Sep 2019 15:26:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729079AbfIHP0s (ORCPT ); Sun, 8 Sep 2019 11:26:48 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:34015 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729077AbfIHP0r (ORCPT ); Sun, 8 Sep 2019 11:26:47 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from maxg@mellanox.com) with ESMTPS (AES256-SHA encrypted); 8 Sep 2019 18:26:45 +0300 Received: from r-vnc12.mtr.labs.mlnx (r-vnc12.mtr.labs.mlnx [10.208.0.12]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id x88FQjLj011361; Sun, 8 Sep 2019 18:26:45 +0300 From: Max Gurtovoy To: linux-block@vger.kernel.org, axboe@kernel.dk, martin.petersen@oracle.com, linux-nvme@lists.infradead.org, keith.busch@intel.com, hch@lst.de, sagi@grimberg.me Cc: shlomin@mellanox.com, israelr@mellanox.com, Max Gurtovoy Subject: [PATCH v4 2/3] block: don't remap ref tag for T10 PI type 0 Date: Sun, 8 Sep 2019 18:26:44 +0300 Message-Id: <1567956405-5585-2-git-send-email-maxg@mellanox.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1567956405-5585-1-git-send-email-maxg@mellanox.com> References: <1567956405-5585-1-git-send-email-maxg@mellanox.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Only type 1 and type 2 have a reference tag by definition. Suggested-by: Keith Busch Signed-off-by: Max Gurtovoy --- changes from v3: - added blk_integrity_need_remap helper --- block/t10-pi.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/block/t10-pi.c b/block/t10-pi.c index a33eac4..753b5a8 100644 --- a/block/t10-pi.c +++ b/block/t10-pi.c @@ -168,6 +168,12 @@ static blk_status_t t10_pi_type3_verify_ip(struct blk_integrity_iter *iter) }; EXPORT_SYMBOL(t10_pi_type3_ip); +static inline bool blk_integrity_need_remap(struct gendisk *disk) +{ + return disk->protection_type == T10_PI_TYPE1_PROTECTION || + disk->protection_type == T10_PI_TYPE2_PROTECTION; +} + /** * t10_pi_prepare - prepare PI prior submitting request to device * @rq: request with PI that should be prepared @@ -178,7 +184,7 @@ static blk_status_t t10_pi_type3_verify_ip(struct blk_integrity_iter *iter) * likely to be different. Remap protection information to match the * physical LBA. * - * Type 3 does not have a reference tag so no remapping is required. + * Types 0 and 3 don't have a reference tag so no remapping is required. */ void t10_pi_prepare(struct request *rq) { @@ -186,7 +192,7 @@ void t10_pi_prepare(struct request *rq) u32 ref_tag = t10_pi_ref_tag(rq); struct bio *bio; - if (rq->rq_disk->protection_type == T10_PI_TYPE3_PROTECTION) + if (!blk_integrity_need_remap(rq->rq_disk)) return; __rq_for_each_bio(bio, rq) { @@ -234,7 +240,7 @@ void t10_pi_prepare(struct request *rq) * to the device, we should remap it back to virtual values expected by the * block layer. * - * Type 3 does not have a reference tag so no remapping is required. + * Types 0 and 3 don't have a reference tag so no remapping is required. */ void t10_pi_complete(struct request *rq, unsigned int nr_bytes) { @@ -243,7 +249,7 @@ void t10_pi_complete(struct request *rq, unsigned int nr_bytes) u32 ref_tag = t10_pi_ref_tag(rq); struct bio *bio; - if (rq->rq_disk->protection_type == T10_PI_TYPE3_PROTECTION) + if (!blk_integrity_need_remap(rq->rq_disk)) return; __rq_for_each_bio(bio, rq) {