From patchwork Mon Nov 16 14:58:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 324943 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E084AC64E90 for ; Mon, 16 Nov 2020 15:00:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A5588241A7 for ; Mon, 16 Nov 2020 15:00:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="vPvF0yPs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731171AbgKPPAP (ORCPT ); Mon, 16 Nov 2020 10:00:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731137AbgKPPAK (ORCPT ); Mon, 16 Nov 2020 10:00:10 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7DD9FC0617A6; Mon, 16 Nov 2020 07:00:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=l33WjPCm9yNjP/lDMXMqfeSBEmxLf9KKJXjU2Vgod3M=; b=vPvF0yPsOjSp4dSMhRHvBehRhV PFOiS/io66DL+FFe4YN2Fb0Rqbc+Nzpp4psxVyQtH5VyzgK4aBlY10MJ0SxK5+DNq8YoroqcIQHJw OIuTXBByC0wVDzrNiZkakvZ0NFRqY8ZwJhRw5jo9u/h87uXYh6iBDLLS4YAlPwVHFZfrqpMwESpy2 S/cZ92gGjV3WkSF1YqzQWyT9omasa0ij1LAeniOiRxHFEakybTIcDPCG+9QeD6K5cDl+9Ihm1Hlf2 hIuzQV52MyZOWFhKNgVtAf/UV4Hbk5CaHh2K6ojORYxj4yNCBgrAeaNTOEGsClhqF7ii0EHL7srAc 6fqEm0Ow==; Received: from [2001:4bb8:180:6600:255b:7def:a93:4a09] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kefz4-0004J1-6I; Mon, 16 Nov 2020 14:59:58 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Justin Sanders , Josef Bacik , Ilya Dryomov , Jack Wang , "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Konrad Rzeszutek Wilk , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Minchan Kim , Mike Snitzer , Song Liu , "Martin K. Petersen" , dm-devel@redhat.com, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-raid@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 75/78] block: stop using bdget_disk for partition 0 Date: Mon, 16 Nov 2020 15:58:06 +0100 Message-Id: <20201116145809.410558-76-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201116145809.410558-1-hch@lst.de> References: <20201116145809.410558-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org We can just dereference the point in struct gendisk instead. Also remove the now unused export. Signed-off-by: Christoph Hellwig --- block/genhd.c | 1 - drivers/block/nbd.c | 4 +--- drivers/block/xen-blkfront.c | 20 +++++--------------- drivers/block/zram/zram_drv.c | 25 ++----------------------- drivers/md/dm.c | 13 ++----------- drivers/s390/block/dasd_ioctl.c | 5 ++--- 6 files changed, 12 insertions(+), 56 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index 5dcb8b8902daae..b2a4e68171519a 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -904,7 +904,6 @@ struct block_device *bdget_disk(struct gendisk *disk, int partno) return bdev; } -EXPORT_SYMBOL(bdget_disk); /* * print a full list of all partitions - intended for places where the root diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 014683968ce174..92f84ed0ba9eb6 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -1488,12 +1488,10 @@ static int nbd_open(struct block_device *bdev, fmode_t mode) static void nbd_release(struct gendisk *disk, fmode_t mode) { struct nbd_device *nbd = disk->private_data; - struct block_device *bdev = bdget_disk(disk, 0); if (test_bit(NBD_RT_DISCONNECT_ON_CLOSE, &nbd->config->runtime_flags) && - bdev->bd_openers == 0) + disk->part0->bd_openers == 0) nbd_disconnect_and_put(nbd); - bdput(bdev); nbd_config_put(nbd); nbd_put(nbd); diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 5b1f99ca77b734..c2721ec73d7291 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -2153,7 +2153,7 @@ static void blkfront_closing(struct blkfront_info *info) } if (info->gd) - bdev = bdget_disk(info->gd, 0); + bdev = bdgrab(info->gd->part0); mutex_unlock(&info->mutex); @@ -2518,7 +2518,7 @@ static int blkfront_remove(struct xenbus_device *xbdev) disk = info->gd; if (disk) - bdev = bdget_disk(disk, 0); + bdev = bdgrab(disk->part0); info->xbdev = NULL; mutex_unlock(&info->mutex); @@ -2595,19 +2595,11 @@ static int blkif_open(struct block_device *bdev, fmode_t mode) static void blkif_release(struct gendisk *disk, fmode_t mode) { struct blkfront_info *info = disk->private_data; - struct block_device *bdev; struct xenbus_device *xbdev; mutex_lock(&blkfront_mutex); - - bdev = bdget_disk(disk, 0); - - if (!bdev) { - WARN(1, "Block device %s yanked out from us!\n", disk->disk_name); + if (disk->part0->bd_openers) goto out_mutex; - } - if (bdev->bd_openers) - goto out; /* * Check if we have been instructed to close. We will have @@ -2619,7 +2611,7 @@ static void blkif_release(struct gendisk *disk, fmode_t mode) if (xbdev && xbdev->state == XenbusStateClosing) { /* pending switch to state closed */ - dev_info(disk_to_dev(bdev->bd_disk), "releasing disk\n"); + dev_info(disk_to_dev(disk), "releasing disk\n"); xlvbd_release_gendisk(info); xenbus_frontend_closed(info->xbdev); } @@ -2628,14 +2620,12 @@ static void blkif_release(struct gendisk *disk, fmode_t mode) if (!xbdev) { /* sudden device removal */ - dev_info(disk_to_dev(bdev->bd_disk), "releasing disk\n"); + dev_info(disk_to_dev(disk), "releasing disk\n"); xlvbd_release_gendisk(info); disk->private_data = NULL; free_info(info); } -out: - bdput(bdev); out_mutex: mutex_unlock(&blkfront_mutex); } diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index e765765263495f..e7a23638e2f181 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1748,7 +1748,6 @@ static ssize_t reset_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct zram *zram = dev_to_zram(dev); - struct block_device *bdev; unsigned short do_reset; int ret = 0; @@ -1758,17 +1757,12 @@ static ssize_t reset_store(struct device *dev, if (!do_reset) return -EINVAL; - bdev = bdget_disk(zram->disk, 0); - if (!bdev) - return -ENOMEM; - mutex_lock(&zram->disk->mutex); - if (bdev->bd_openers) + if (zram->disk->part0->bd_openers) ret = -EBUSY; else zram_reset_device(zram); mutex_unlock(&zram->disk->mutex); - bdput(bdev); return ret ? ret : len; } @@ -1931,24 +1925,9 @@ static int zram_add(void) return ret; } -static bool zram_busy(struct zram *zram) -{ - struct block_device *bdev; - bool busy = false; - - bdev = bdget_disk(zram->disk, 0); - if (bdev) { - if (bdev->bd_openers) - busy = true; - bdput(bdev); - } - - return busy; -} - static int zram_remove(struct zram *zram) { - if (zram_busy(zram)) + if (zram->disk->part0->bd_openers) return -EBUSY; del_gendisk(zram->disk); diff --git a/drivers/md/dm.c b/drivers/md/dm.c index ac46f6e41279cc..ec48ccae50dd53 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2375,17 +2375,12 @@ struct dm_table *dm_swap_table(struct mapped_device *md, struct dm_table *table) */ static int lock_fs(struct mapped_device *md) { - struct block_device *bdev; int r; WARN_ON(md->frozen_sb); - bdev = bdget_disk(md->disk, 0); - if (!bdev) - return -ENOMEM; - md->frozen_sb = freeze_bdev(bdev); + md->frozen_sb = freeze_bdev(md->disk->part0); if (IS_ERR(md->frozen_sb)) { - bdput(bdev); r = PTR_ERR(md->frozen_sb); md->frozen_sb = NULL; return r; @@ -2398,14 +2393,10 @@ static int lock_fs(struct mapped_device *md) static void unlock_fs(struct mapped_device *md) { - struct block_device *bdev; - if (!test_bit(DMF_FROZEN, &md->flags)) return; - bdev = md->frozen_sb->s_bdev; - thaw_bdev(bdev, md->frozen_sb); - bdput(bdev); + thaw_bdev(md->frozen_sb->s_bdev, md->frozen_sb); md->frozen_sb = NULL; clear_bit(DMF_FROZEN, &md->flags); } diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index 304eba1acf163c..9f642440894655 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -220,9 +220,8 @@ dasd_format(struct dasd_block *block, struct format_data_t *fdata) * enabling the device later. */ if (fdata->start_unit == 0) { - struct block_device *bdev = bdget_disk(block->gdp, 0); - bdev->bd_inode->i_blkbits = blksize_bits(fdata->blksize); - bdput(bdev); + block->gdp->part0->bd_inode->i_blkbits = + blksize_bits(fdata->blksize); } rc = base->discipline->format_device(base, fdata, 1);