From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753698AbcHVEUZ (ORCPT ); Mon, 22 Aug 2016 00:20:25 -0400 Received: from mail-it0-f67.google.com ([209.85.214.67]:33294 "EHLO mail-it0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751198AbcHVEUW (ORCPT ); Mon, 22 Aug 2016 00:20:22 -0400 From: Shaun Tancheff To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Shaun Tancheff , Jens Axboe , Christoph Hellwig , "James E . J . Bottomley" , "Martin K . Petersen" , Damien Le Moal , Hannes Reinecke , Josh Bingaman , "David S . Miller" , Geert Uytterhoeven , Andrew Morton , Greg Kroah-Hartman , Mauro Carvalho Chehab , Guenter Roeck , Ming Lei , Mike Christie , Keith Busch , Mike Snitzer , Johannes Thumshirn , Shaohua Li , Dan Williams , Sagi Grimberg , stephen hemminger , Jarkko Sakkinen , Alexandre Bounine , Asias He , Sabrina Dubroca , Mike Frysinger , Andrea Arcangeli , Linus Walleij , Jeff Layton , "J . Bruce Fields" Subject: [PATCH v8 0/2] Block layer support ZAC/ZBC commands Date: Sun, 21 Aug 2016 23:20:08 -0500 Message-Id: <20160822042010.32416-1-shaun@tancheff.com> X-Mailer: git-send-email 2.9.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jens, This series is based on linus' v4.8-rc2 branch. As Host Aware drives are becoming available we would like to be able to make use of such drives. This series is also intended to be suitable for use by Host Managed drives. ZBC [and ZAC] drives add new commands for discovering and working with Zones. Part one of this series expands the bio/request reserved op size from 3 to 4 bits and then adds op codes for each of the ZBC commands: Report zones, close zone, finish zone, open zone and reset zone. Part two of this series deals with integrating these new bio/request op's with Hannes' zone cache. This extends the ZBC support up to the block layer allowing direct control by file systems or device mapper targets. Also by deferring the zone handling to the authoritative subsystem there is an overall lower memory usage for holding the active zone information as well as clarifying responsible party for maintaining the write pointer for each active zone. By way of example a DM target may have several writes in progress. To sector (or lba) for those writes will each depend on the previous write. While the drive's write pointer will be updated as writes are completed the DM target will be maintaining both where the next write should be scheduled from and where the write pointer is based on writes completed w/o errors. Knowing the drive zone topology enables DM targets and file systems to extend their block allocation schemes and issue write pointer resets (or discards) that are zone aligned. A perhaps non-obvious approach is that a conventional drive will returns a zone report descriptor with a single large conventional zone. This is intended to allow a collection of zoned and non-zoned media to be stitched together to provide a file system with a zoned device with conventional space mapped to where it is useful. Patches for util-linux can be found here: git@github.com:stancheff/util-linux.git v2.28.1+biof https://github.com/stancheff/util-linux/tree/v2.28.1%2Bbiof This patch is available here: https://github.com/stancheff/linux/tree/v4.8-rc2%2Bbiof.v8 git@github.com:stancheff/linux.git v4.8-rc2+biof.v8 v8: - Changed zone report to default to reading from zone cache. - Changed ioctl for zone commands to support forcing a query or command to be sent to media. - Fixed report zones copy to user to work when HARDENED_USERCOPY is enabled v7: - Initial support for Hannes' zone cache. v6: - Fix page alloc to include DMA flag for ioctl. v5: - In sd_setup_zone_action_cmnd, remove unused vars and fix switch indent - In blk-lib fix documentation v4: - Rebase on linux-next tag next-20160617. - Change bio flags to bio op's - Dropped ata16 hackery V3: - Rebase on Mike Cristie's separate bio operations - Update blkzoned_api.h to include report zones PARTIAL bit. - Use zoned report reserved bit for ata-passthrough flag. V2: - Changed bi_rw to op_flags clarify sepeartion of bio op from flags. - Fixed memory leak in blkdev_issue_zone_report failing to put_bio(). - Documented opt in blkdev_issue_zone_report. - Moved include/uapi/linux/fs.h changes to patch 3 - Fixed commit message for first patch in series. Shaun Tancheff (2): Add bio/request flags to issue ZBC/ZAC commands Add ioctl to issue ZBC/ZAC commands via block layer MAINTAINERS | 9 ++ block/blk-lib.c | 94 +++++++++++++++++ block/ioctl.c | 149 +++++++++++++++++++++++++++ drivers/scsi/sd.c | 121 ++++++++++++++++++++++ drivers/scsi/sd.h | 1 + include/linux/bio.h | 8 +- include/linux/blk_types.h | 7 +- include/linux/blkdev.h | 1 + include/linux/blkzoned_api.h | 25 +++++ include/uapi/linux/Kbuild | 1 + include/uapi/linux/blkzoned_api.h | 210 ++++++++++++++++++++++++++++++++++++++ include/uapi/linux/fs.h | 1 + 12 files changed, 625 insertions(+), 2 deletions(-) create mode 100644 include/linux/blkzoned_api.h create mode 100644 include/uapi/linux/blkzoned_api.h -- 2.9.3