From mboxrd@z Thu Jan 1 00:00:00 1970 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 C67F4C7EE24 for ; Thu, 18 May 2023 04:23:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230020AbjEREXd (ORCPT ); Thu, 18 May 2023 00:23:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229990AbjEREXb (ORCPT ); Thu, 18 May 2023 00:23:31 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA88B115; Wed, 17 May 2023 21:23:29 -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:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=yXqzctwvrt2mzrQ8XZQ/YXlMgRwTYOTgMECAAuaBtIE=; b=aBwelQ6aSfvIL1vnjQjs7ZTrja yoNoJPXOx/mGnVfzhTxM1ON7llyBf7j7/k7VuyMQYQWvCuY+x+CgwjOLH/dpdWlz7nDRL12/G9uD6 s84cpX5NhAhgOeP8+gILgTETrvqqx0ehr7h8OBBAYCAlXIqTZfqr2RXAOREE0ewe2nWDsXh8j1H00 SYH1t/IU7vO6lR5RZrQEQkEKHVk69rtvp70BdO/clOS+QA9w2Yi07zZYZE4jf2kDtXS/dBs4AkKpE ZYsZ2m0zi00X7Mr/qyMQEXmALRGM8MhvBiF1REBEbDnlRg3tbFwKMucu9U1SCIPYkalQr8O72brMY 7zd1mLEQ==; 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 1pzVAi-00BqNS-2s; Thu, 18 May 2023 04:23:25 +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: introduce bdev holder ops and a file system shutdown method v2 Date: Thu, 18 May 2023 06:23:09 +0200 Message-Id: <20230518042323.663189-1-hch@lst.de> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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-fsdevel@vger.kernel.org Hi all, this series fixes the long standing problem that we never had a good way to communicate block device events to the user of the block device. It fixes this by introducing a new set of holder ops registered at blkdev_get_by_* time for the exclusive holder, and then wire that up to a shutdown super operation to report the block device remove to the file systems. Changes since v1: - add a patch to refactor bd_may_claim - add a sanity check for mismatching holder ops in bd_may_claim - move partition removal later in del_gendisk so that partitions are still around for the shutdown notification - add SHUTDOWN_DEVICE_REMOVED to XFS_SHUTDOWN_STRINGS Diffstat: block/bdev.c | 159 ++++++++++++++++++++---------------- block/blk.h | 2 block/fops.c | 2 block/genhd.c | 78 +++++++++++++---- block/ioctl.c | 3 block/partitions/core.c | 31 +++---- drivers/block/drbd/drbd_nl.c | 3 drivers/block/loop.c | 2 drivers/block/pktcdvd.c | 5 - drivers/block/rnbd/rnbd-srv.c | 2 drivers/block/xen-blkback/xenbus.c | 2 drivers/block/zram/zram_drv.c | 2 drivers/md/bcache/super.c | 2 drivers/md/dm.c | 2 drivers/md/md.c | 2 drivers/mtd/devices/block2mtd.c | 4 drivers/nvme/target/io-cmd-bdev.c | 2 drivers/s390/block/dasd_genhd.c | 2 drivers/target/target_core_iblock.c | 2 drivers/target/target_core_pscsi.c | 3 fs/btrfs/dev-replace.c | 2 fs/btrfs/volumes.c | 6 - fs/erofs/super.c | 2 fs/ext4/super.c | 3 fs/f2fs/super.c | 4 fs/jfs/jfs_logmgr.c | 2 fs/nfs/blocklayout/dev.c | 5 - fs/nilfs2/super.c | 2 fs/ocfs2/cluster/heartbeat.c | 2 fs/reiserfs/journal.c | 5 - fs/super.c | 21 ++++ fs/xfs/xfs_fsops.c | 3 fs/xfs/xfs_mount.h | 4 fs/xfs/xfs_super.c | 21 ++++ include/linux/blk_types.h | 2 include/linux/blkdev.h | 12 ++ include/linux/fs.h | 1 kernel/power/swap.c | 4 mm/swapfile.c | 3 39 files changed, 266 insertions(+), 148 deletions(-)