From patchwork Wed Apr 6 06:05:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 1613757 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=zempXEZl; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4KYDlT63bMz9sFr for ; Wed, 6 Apr 2022 16:15:33 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uhi+ZGAB103gQdFhjPU58mGXhxqtl63x1xRwPnzFTwg=; b=zempXEZl79Lgyg 2HrAERTfNqQ6mI6kIETW+0aFBRzxF4mJTQAl1ZlBmpzoj03BKIP98ScRIoOShucFZgkbv+PaskNhk iZJyvQV6or/wO3QBGyRKBA8INojT7xhoXSw4wEbL2Q5Cr653TrnaYYp1jUA+I1Ck1R0Oj9ikUmgGD wXWFv1BARA4ugiMKuPjIME9E5YrI7mpy9TmGODvcmZZd31Y/7urz698Q1+4L8x53mGd35WOw+hjp/ vgt8o7oHjOjaDMP49TOVOMDJHM2pO2mENkBQuW/HIL026Z6X5tAiL2qmJSYda7sukLY+2MSrAoVUh qaKGPXrvN4jtRO5n2Irw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbywX-0040Ry-0w; Wed, 06 Apr 2022 06:15:01 +0000 Received: from 213-225-3-188.nat.highway.a1.net ([213.225.3.188] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbynq-003v9s-8N; Wed, 06 Apr 2022 06:06:02 +0000 From: Christoph Hellwig To: Jens Axboe Cc: dm-devel@redhat.com, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@oss.oracle.com, linux-mm@kvack.org Subject: [PATCH 11/27] block: add a bdev_write_cache helper Date: Wed, 6 Apr 2022 08:05:00 +0200 Message-Id: <20220406060516.409838-12-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220406060516.409838-1-hch@lst.de> References: <20220406060516.409838-1-hch@lst.de> MIME-Version: 1.0 X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Add a helper to check the write cache flag based on the block_device instead of having to poke into the block layer internal request_queue. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Acked-by: David Sterba --- drivers/block/rnbd/rnbd-srv.c | 2 +- drivers/block/xen-blkback/xenbus.c | 2 +- drivers/target/target_core_iblock.c | 8 ++------ fs/btrfs/disk-io.c | 3 +-- include/linux/blkdev.h | 5 +++++ 5 files changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c index f04df6294650b..f8cc3c5fecb4b 100644 --- a/drivers/block/rnbd/rnbd-srv.c +++ b/drivers/block/rnbd/rnbd-srv.c @@ -558,7 +558,7 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp, rsp->secure_discard = cpu_to_le16(rnbd_dev_get_secure_discard(rnbd_dev)); rsp->cache_policy = 0; - if (test_bit(QUEUE_FLAG_WC, &q->queue_flags)) + if (bdev_write_cache(rnbd_dev->bdev)) rsp->cache_policy |= RNBD_WRITEBACK; if (blk_queue_fua(q)) rsp->cache_policy |= RNBD_FUA; diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index f09040435e2e5..8b691fe50475f 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -517,7 +517,7 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle, vbd->type |= VDISK_REMOVABLE; q = bdev_get_queue(bdev); - if (q && test_bit(QUEUE_FLAG_WC, &q->queue_flags)) + if (bdev_write_cache(bdev)) vbd->flush_support = true; if (q && blk_queue_secure_erase(q)) diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index b41ee5c3b5b82..03013e85ffc03 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -737,7 +737,7 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, if (test_bit(QUEUE_FLAG_FUA, &q->queue_flags)) { if (cmd->se_cmd_flags & SCF_FUA) opf |= REQ_FUA; - else if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) + else if (!bdev_write_cache(ib_dev->ibd_bd)) opf |= REQ_FUA; } } else { @@ -886,11 +886,7 @@ iblock_parse_cdb(struct se_cmd *cmd) static bool iblock_get_write_cache(struct se_device *dev) { - struct iblock_dev *ib_dev = IBLOCK_DEV(dev); - struct block_device *bd = ib_dev->ibd_bd; - struct request_queue *q = bdev_get_queue(bd); - - return test_bit(QUEUE_FLAG_WC, &q->queue_flags); + return bdev_write_cache(IBLOCK_DEV(dev)->ibd_bd); } static const struct target_backend_ops iblock_ops = { diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index b30309f187cf0..d80adee32128d 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -4247,8 +4247,7 @@ static void write_dev_flush(struct btrfs_device *device) * of simplicity, since this is a debug tool and not meant for use in * non-debug builds. */ - struct request_queue *q = bdev_get_queue(device->bdev); - if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) + if (bdev_write_cache(device->bdev)) return; #endif diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 3a9578e14a6b0..807a49aa5a27a 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1331,6 +1331,11 @@ static inline bool bdev_nonrot(struct block_device *bdev) return blk_queue_nonrot(bdev_get_queue(bdev)); } +static inline bool bdev_write_cache(struct block_device *bdev) +{ + return test_bit(QUEUE_FLAG_WC, &bdev_get_queue(bdev)->queue_flags); +} + static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev) { struct request_queue *q = bdev_get_queue(bdev);