From patchwork Thu May 18 04:23:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13246132 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80BF1C7EE2A for ; Thu, 18 May 2023 04:23:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230044AbjEREXy (ORCPT ); Thu, 18 May 2023 00:23:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230032AbjEREXt (ORCPT ); Thu, 18 May 2023 00:23:49 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A6113AB0; Wed, 17 May 2023 21:23:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=HyklL2iWXdjC28z7K5YO7CjyIKxO/oVJfR1POfv9SJ4=; b=0Uj69yB163Pq77HITyNPP1V6RV YaC7zALCWeLxkIucB2JywOYywHkyVOpy0N+lunk6nt+B5UtA+luQsoFUTL9t9DKiJviPF043erxo3 vGAWGYnI1wnYdmAHJCPtEeRhfKLmOocXm0skHaw/btZf5q4aPEyFOUPt/N5C/7vv8w8YWwqu91HMk pJL3Mgvir7ZnHYE510hwTq+dCJRM8Xk/2YBiMSxsel+LGjhUo+Kwugf+q86darYCzcQ13DmmS9J0y VTFt4IZtS65MADlFh7AsOE/Zb+L8ru8IOnQJ+7D3PZ60AS+ILn9CY+0OACXcw3GtR/ZZc+xmCBy9h BqK249ww==; Received: from [2001:4bb8:188:3dd5:c90:b13:29fb:f2b9] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pzVB1-00BqQ8-0o; Thu, 18 May 2023 04:23:43 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Al Viro , Christian Brauner , "Darrick J. Wong" , Jan Kara , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Subject: [PATCH 07/13] block: delete partitions later in del_gendisk Date: Thu, 18 May 2023 06:23:16 +0200 Message-Id: <20230518042323.663189-8-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230518042323.663189-1-hch@lst.de> References: <20230518042323.663189-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Delay dropping the block_devices for partitions in del_gendisk until after the call to blk_mark_disk_dead, so that we can implementat notification of removed devices in blk_mark_disk_dead. This requires splitting a lower-level drop_partition helper out of delete_partition and using that from del_gendisk, while having a common loop for the whole device and partitions that calls remove_inode_hash, fsync_bdev and __invalidate_device before the call to blk_mark_disk_dead. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- block/blk.h | 2 +- block/genhd.c | 24 +++++++++++++++++++----- block/partitions/core.c | 19 ++++++++++++------- 3 files changed, 32 insertions(+), 13 deletions(-) diff --git a/block/blk.h b/block/blk.h index 45547bcf111938..4363052f90416a 100644 --- a/block/blk.h +++ b/block/blk.h @@ -409,7 +409,7 @@ int bdev_add_partition(struct gendisk *disk, int partno, sector_t start, int bdev_del_partition(struct gendisk *disk, int partno); int bdev_resize_partition(struct gendisk *disk, int partno, sector_t start, sector_t length); -void blk_drop_partitions(struct gendisk *disk); +void drop_partition(struct block_device *part); void bdev_set_nr_sectors(struct block_device *bdev, sector_t sectors); diff --git a/block/genhd.c b/block/genhd.c index a744daeed55318..bd4c4eca31363e 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -615,6 +615,8 @@ EXPORT_SYMBOL_GPL(blk_mark_disk_dead); void del_gendisk(struct gendisk *disk) { struct request_queue *q = disk->queue; + struct block_device *part; + unsigned long idx; might_sleep(); @@ -623,16 +625,28 @@ void del_gendisk(struct gendisk *disk) disk_del_events(disk); + /* + * Prevent new openers by unlinked the bdev inode, and write out + * dirty data before marking the disk dead and stopping all I/O. + */ mutex_lock(&disk->open_mutex); - remove_inode_hash(disk->part0->bd_inode); - blk_drop_partitions(disk); + xa_for_each(&disk->part_tbl, idx, part) { + remove_inode_hash(part->bd_inode); + fsync_bdev(part); + __invalidate_device(part, true); + } mutex_unlock(&disk->open_mutex); - fsync_bdev(disk->part0); - __invalidate_device(disk->part0, true); - blk_mark_disk_dead(disk); + /* + * Drop all partitions now that the disk is marked dead. + */ + mutex_lock(&disk->open_mutex); + xa_for_each_start(&disk->part_tbl, idx, part, 1) + drop_partition(part); + mutex_unlock(&disk->open_mutex); + if (!(disk->flags & GENHD_FL_HIDDEN)) { sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi"); diff --git a/block/partitions/core.c b/block/partitions/core.c index fa5c707fe0ad2f..31ac815d77a83c 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -263,10 +263,19 @@ struct device_type part_type = { .uevent = part_uevent, }; -static void delete_partition(struct block_device *part) +void drop_partition(struct block_device *part) { lockdep_assert_held(&part->bd_disk->open_mutex); + xa_erase(&part->bd_disk->part_tbl, part->bd_partno); + kobject_put(part->bd_holder_dir); + + device_del(&part->bd_device); + put_device(&part->bd_device); +} + +static void delete_partition(struct block_device *part) +{ /* * Remove the block device from the inode hash, so that it cannot be * looked up any more even when openers still hold references. @@ -276,11 +285,7 @@ static void delete_partition(struct block_device *part) fsync_bdev(part); __invalidate_device(part, true); - xa_erase(&part->bd_disk->part_tbl, part->bd_partno); - kobject_put(part->bd_holder_dir); - device_del(&part->bd_device); - - put_device(&part->bd_device); + drop_partition(part); } static ssize_t whole_disk_show(struct device *dev, @@ -519,7 +524,7 @@ static bool disk_unlock_native_capacity(struct gendisk *disk) return true; } -void blk_drop_partitions(struct gendisk *disk) +static void blk_drop_partitions(struct gendisk *disk) { struct block_device *part; unsigned long idx;