From patchwork Fri Apr 17 12:15:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 11495003 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 7C64881 for ; Fri, 17 Apr 2020 12:16:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64472221EC for ; Fri, 17 Apr 2020 12:16:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="KjuyHPm1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728390AbgDQMP6 (ORCPT ); Fri, 17 Apr 2020 08:15:58 -0400 Received: from esa2.hgst.iphmx.com ([68.232.143.124]:50643 "EHLO esa2.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728307AbgDQMP4 (ORCPT ); Fri, 17 Apr 2020 08:15:56 -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=1587125756; x=1618661756; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=idI1WH8nxkPnh+O/RqijVff+VKCcvan/3RihAz7vyTw=; b=KjuyHPm1HBxuiYaPHs+0aPs5MxQmaFHLRRSNtD9ffer6+CkdBNKwUaqB fJyJrT7WQ3376mhTtCaO+7HlAd+oN72VOIV1lNz3MHLD4MBl8LF57c6hy 3tKF+WDja0vxtbzfuMpP0lJKiXWLFYTDdyrhArM/6Sy4C8AvpPrR3sioE mFGvy4bUCreYONTSjMyNvkZz2J8XmpdrSjr01R06Tw5bPXYdose67qBjE pZO62YX7U3CpLYQJLYlonS0BntWpLY/TR6kT3JovsBIZqHa+SkGpiXHhK J7LDqjmCWw+RrDbm0yPC4MxDEWbmprFC5asPIYa3s4ifhbUlo4biKJKXY A==; IronPort-SDR: eJhNd2b28ErsCnbRPBKJCxVa7DVFaXISphbe7+EiwSprmV/YGJ6U4oNOosfYlnmjagL1z6sm8r upfg1As+q4FK7okKmTLHQTaU6mGZVmTJTMEa8OY92sn+axb5wL7Xyc6SnodWHbwKK1WyvTlyJv gVqtamxLzaJu//tJ4wm9tSg3Ssr6hzVZcvtYdRCyi8NVpeny6A+TZ1dBZ+hU/MEd5eHs0vZapz DOKaB6C/QN1khCFFkrbcHbSJupuRcJsEXPgYpHXlPFeM5RKEK8IQ6MtX+TzzozzPPM5ZiwKTKS Ymg= X-IronPort-AV: E=Sophos;i="5.72,394,1580745600"; d="scan'208";a="237989209" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 17 Apr 2020 20:15:56 +0800 IronPort-SDR: FOz5e14Rs4RJ5Zg5+0is7jELJPnVDNNCYq2iJTNt+ZlFLl4eC1FEoHwNDxQ86LEjK7Mm3xX/Rj P6O9lG1RfhXVBIdggXG8xeRjM0Y7H+JYQ= Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Apr 2020 05:06:53 -0700 IronPort-SDR: 0erbExPLkPILObTH3yKq8aAPplNx7/l9ZZQdRXmIxlqL2N/Vr/nUymtdIK2ZEE103vTyUAOoh0 9Ets8YGG6kyw== WDCIronportException: Internal Received: from unknown (HELO redsun60.ssa.fujisawa.hgst.com) ([10.149.66.36]) by uls-op-cesaip01.wdc.com with ESMTP; 17 Apr 2020 05:15:54 -0700 From: Johannes Thumshirn To: Jens Axboe Cc: Christoph Hellwig , linux-block , Damien Le Moal , Keith Busch , "linux-scsi @ vger . kernel . org" , "Martin K . Petersen" , "linux-fsdevel @ vger . kernel . org" , Daniel Wagner , Johannes Thumshirn , Christoph Hellwig Subject: [PATCH v7 05/11] block: introduce blk_req_zone_write_trylock Date: Fri, 17 Apr 2020 21:15:30 +0900 Message-Id: <20200417121536.5393-6-johannes.thumshirn@wdc.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200417121536.5393-1-johannes.thumshirn@wdc.com> References: <20200417121536.5393-1-johannes.thumshirn@wdc.com> MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Introduce blk_req_zone_write_trylock(), which either grabs the write-lock for a sequential zone or returns false, if the zone is already locked. Signed-off-by: Johannes Thumshirn Reviewed-by: Christoph Hellwig --- block/blk-zoned.c | 14 ++++++++++++++ include/linux/blkdev.h | 1 + 2 files changed, 15 insertions(+) diff --git a/block/blk-zoned.c b/block/blk-zoned.c index f87956e0dcaf..c822cfa7a102 100644 --- a/block/blk-zoned.c +++ b/block/blk-zoned.c @@ -82,6 +82,20 @@ bool blk_req_needs_zone_write_lock(struct request *rq) } EXPORT_SYMBOL_GPL(blk_req_needs_zone_write_lock); +bool blk_req_zone_write_trylock(struct request *rq) +{ + unsigned int zno = blk_rq_zone_no(rq); + + if (test_and_set_bit(zno, rq->q->seq_zones_wlock)) + return false; + + WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED); + rq->rq_flags |= RQF_ZONE_WRITE_LOCKED; + + return true; +} +EXPORT_SYMBOL_GPL(blk_req_zone_write_trylock); + void __blk_req_zone_write_lock(struct request *rq) { if (WARN_ON_ONCE(test_and_set_bit(blk_rq_zone_no(rq), diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 774947365341..0797d1e81802 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1740,6 +1740,7 @@ extern int bdev_write_page(struct block_device *, sector_t, struct page *, #ifdef CONFIG_BLK_DEV_ZONED bool blk_req_needs_zone_write_lock(struct request *rq); +bool blk_req_zone_write_trylock(struct request *rq); void __blk_req_zone_write_lock(struct request *rq); void __blk_req_zone_write_unlock(struct request *rq);