From patchwork Wed Nov 18 08:47:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11914599 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 A4388A6A for ; Wed, 18 Nov 2020 09:00:47 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 63CC4221E9 for ; Wed, 18 Nov 2020 09:00:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="jr1pmgSm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 63CC4221E9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.29545.59075 (Exim 4.92) (envelope-from ) id 1kfJJn-0001hm-5F; Wed, 18 Nov 2020 08:59:59 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 29545.59075; Wed, 18 Nov 2020 08:59:59 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kfJJn-0001hb-1Z; Wed, 18 Nov 2020 08:59:59 +0000 Received: by outflank-mailman (input) for mailman id 29545; Wed, 18 Nov 2020 08:59:58 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kfJ9q-0006e0-4H for xen-devel@lists.xenproject.org; Wed, 18 Nov 2020 08:49:42 +0000 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id b48ae73e-9e8a-4dbf-b138-9c98ee0aa84f; Wed, 18 Nov 2020 08:48:42 +0000 (UTC) Received: from [2001:4bb8:18c:31ba:32b1:ec66:5459:36a] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kfJ8f-0007o7-Ef; Wed, 18 Nov 2020 08:48:30 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kfJ9q-0006e0-4H for xen-devel@lists.xenproject.org; Wed, 18 Nov 2020 08:49:42 +0000 X-Inumbo-ID: b48ae73e-9e8a-4dbf-b138-9c98ee0aa84f Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id b48ae73e-9e8a-4dbf-b138-9c98ee0aa84f; Wed, 18 Nov 2020 08:48:42 +0000 (UTC) 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=jJNK9/H8sfmZrYurqzVwgyu9MJNwxw5ihe1GEzXuM6I=; b=jr1pmgSmLgODWAxYLebiTtixWG E1FQCz1t4RsLXrDcKfCHo6N5wK4/ZRUATPnOoS+1KhQWSkL+IYBAcKPpKT/D+msyWWNJRH4w+SFnj JBRSKKj3TirzVD1MdsKHZ9Flq10GFrmbhjDJZhSyjzB4kyj1B0nzh8UbaRZ4y/HZdtSR9e8+1QDyD trkeCJ3uOhAJr0QSCPeeqOHGZi+qybaTd0Iwo6NsH61NtELVxfc3F3mwTNzCSqbmQPVbAslaT7l/f rcS41nOzYQ+YaKX/c14HNjwjzYbiCVclFfMYiSfxLG2wzSa+j8BcmUl2NsNkYxtieohJSwf+tr+K1 +WNVXfww==; Received: from [2001:4bb8:18c:31ba:32b1:ec66:5459:36a] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kfJ8f-0007o7-Ef; Wed, 18 Nov 2020 08:48:30 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Tejun Heo , Josef Bacik , Konrad Rzeszutek Wilk , Coly Li , Mike Snitzer , dm-devel@redhat.com, Richard Weinberger , Jan Kara , linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 16/20] block: stop using bdget_disk for partition 0 Date: Wed, 18 Nov 2020 09:47:56 +0100 Message-Id: <20201118084800.2339180-17-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201118084800.2339180-1-hch@lst.de> References: <20201118084800.2339180-1-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 We can just dereference the point in struct gendisk instead. Also remove the now unused export. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- block/genhd.c | 1 - drivers/block/nbd.c | 4 +--- drivers/block/xen-blkfront.c | 20 +++++--------------- drivers/block/zram/zram_drv.c | 18 +++--------------- drivers/md/dm.c | 8 +------- drivers/s390/block/dasd_ioctl.c | 5 ++--- 6 files changed, 12 insertions(+), 44 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index a14e2408e3d4e8..ec41d0f18f5ce1 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -907,7 +907,6 @@ 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 79521e33d30ed5..188e0b47534bcf 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 01757f9578dcb8..56024905bd242c 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1748,7 +1748,7 @@ 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; + struct block_device *bdev = zram->disk->part0; unsigned short do_reset; int ret = 0; @@ -1758,17 +1758,12 @@ 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(&bdev->bd_mutex); if (bdev->bd_openers) ret = -EBUSY; else zram_reset_device(zram); mutex_unlock(&bdev->bd_mutex); - bdput(bdev); return ret ? ret : len; } @@ -1933,15 +1928,8 @@ static int zram_add(void) static int zram_remove(struct zram *zram) { - struct block_device *bdev = bdget_disk(zram->disk, 0); - - if (bdev) { - if (bdev->bd_openers) { - bdput(bdev); - return -EBUSY; - } - bdput(bdev); - } + if (zram->disk->part0->bd_openers) + return -EBUSY; del_gendisk(zram->disk); zram_debugfs_unregister(zram); diff --git a/drivers/md/dm.c b/drivers/md/dm.c index c9438feefe55a3..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; @@ -2402,7 +2397,6 @@ static void unlock_fs(struct mapped_device *md) return; thaw_bdev(md->frozen_sb->s_bdev, md->frozen_sb); - bdput(md->frozen_sb->s_bdev); 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);