From patchwork Thu Oct 11 07:09:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 10636153 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 80FC5112B for ; Thu, 11 Oct 2018 07:09:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5904A2AE79 for ; Thu, 11 Oct 2018 07:09:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4A1702AEFF; Thu, 11 Oct 2018 07:09:56 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham 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 C9C7C2AE79 for ; Thu, 11 Oct 2018 07:09:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726008AbeJKOfu (ORCPT ); Thu, 11 Oct 2018 10:35:50 -0400 Received: from esa1.hgst.iphmx.com ([68.232.141.245]:12787 "EHLO esa1.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725995AbeJKOfu (ORCPT ); Thu, 11 Oct 2018 10:35:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1539241794; x=1570777794; h=from:to:cc:subject:date:message-id; bh=0r3GqpTc2QChxlVkX/il66gkUvNVbGkRwm2S0QPY7Yg=; b=isfe7Of6JUB7YgNbcnFFaJzeS4HgibOiRGoMa3b064xqIiCs/XhXy0OT ylz1XMXg0vzOLrOMubAOXc6UAL3iizkgTZNoZ8d+h9xcaZhwdVcy+UEvf Z7w/98I833XzbI+s7nkRBlZtvaSIMWlks4tu68ZtsgG3v+nAsaD1ciNho xkY7Av+8YgrlvlRpAyshLYdMOkQ+NTalGjqdOlTLe3fCLv6R+TtCWTKDq szttIzCur9acA3Hx7Wyt6D7eKMEI+/5f74fLYTJLdtQeQHsLTERylvhRQ r9e7ld/kn0WCcxiJmOCPsn80+z3C2xoXk2JofjiGRhJ6iYxYCzyw6jlma g==; X-IronPort-AV: E=Sophos;i="5.54,367,1534780800"; d="scan'208";a="196047548" Received: from h199-255-45-15.hgst.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 11 Oct 2018 15:09:54 +0800 Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP; 10 Oct 2018 23:54:52 -0700 Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip02.wdc.com with ESMTP; 11 Oct 2018 00:09:53 -0700 From: Damien Le Moal To: linux-block@vger.kernel.org, Jens Axboe , linux-scsi@vger.kernel.org, "Martin K . Petersen" , dm-devel@redhat.com, Mike Snitzer Cc: Christoph Hellwig , Matias Bjorling Subject: [PATCH v2 00/11] Zoned block device support improvements Date: Thu, 11 Oct 2018 16:09:41 +0900 Message-Id: <20181011070952.13248-1-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.17.1 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This series improves zoned block device support (reduce overhead) and introduces many simplifications to the code (overall, there are more deletions than insertions). In more details: * Patches 1 to 3 are SCSI side (sd driver) cleanups and improvements reducing the overhead of report zones command execution during disk scan and revalidation. * Patches 4 to 9 improve the useability and user API of zoned block devices. * Patch 10 is the main part of this series. This patch replaces the REQ_OP_ZONE_REPORT BIO/request operation for executing report zones commands with a block device file operation, removing the need for the command reply payload in-place rewriting in the BIO buffer. This leads to major simplification of the code in many places. * Patch 11 further simplifies the code of low level drivers by providing a generic implementation of zoned block device request queue zone bitmaps initialization and revalidation. Please consider the addition of these patches in 4.20. Comments are as always welcome. Changes from v1: * Addressed Christoph's and Bart's comments * Fixed several compilation errors with zoned block device support disabled * Rebased on latest rc including the most recent dm patches Christoph Hellwig (1): block: add a report_zones method Damien Le Moal (10): scsi: sd_zbc: Rearrange code scsi: sd_zbc: Reduce boot device scan and revalidate time scsi: sd_zbc: Fix sd_zbc_check_zones() error checks block: Introduce blkdev_nr_zones() helper block: Limit allocation of zone descriptors for report zones block: Introduce BLKGETZONESZ ioctl block: Introduce BLKGETNRZONES ioctl block: Improve zone reset execution block: Expose queue nr_zones in sysfs block: Introduce blk_revalidate_disk_zones() block/blk-core.c | 1 - block/blk-lib.c | 13 +- block/blk-mq-debugfs.c | 1 - block/blk-sysfs.c | 13 + block/blk-zoned.c | 359 +++++++++++++++--------- block/blk.h | 8 + block/ioctl.c | 4 + drivers/block/null_blk.h | 11 +- drivers/block/null_blk_main.c | 30 +- drivers/block/null_blk_zoned.c | 57 +--- drivers/md/dm-flakey.c | 30 +- drivers/md/dm-linear.c | 35 ++- drivers/md/dm-table.c | 10 + drivers/md/dm-zoned-target.c | 3 +- drivers/md/dm.c | 169 ++++++----- drivers/scsi/sd.c | 15 +- drivers/scsi/sd.h | 15 +- drivers/scsi/sd_zbc.c | 497 +++++++++------------------------ include/linux/blk_types.h | 2 - include/linux/blkdev.h | 22 +- include/linux/device-mapper.h | 12 +- include/trace/events/f2fs.h | 1 - include/uapi/linux/blkzoned.h | 3 + 23 files changed, 591 insertions(+), 720 deletions(-)