From patchwork Sun Sep 25 13:33:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 12987989 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4AC64C6FA82 for ; Sun, 25 Sep 2022 13:33:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A7A858D0008; Sun, 25 Sep 2022 09:33:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A29A78D0001; Sun, 25 Sep 2022 09:33:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8A4198D0008; Sun, 25 Sep 2022 09:33:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 795C88D0001 for ; Sun, 25 Sep 2022 09:33:53 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 5C5EF4016B for ; Sun, 25 Sep 2022 13:33:53 +0000 (UTC) X-FDA: 79950700746.06.5AA3FD0 Received: from mail1.bemta32.messagelabs.com (mail1.bemta32.messagelabs.com [195.245.230.66]) by imf12.hostedemail.com (Postfix) with ESMTP id DBD7840002 for ; Sun, 25 Sep 2022 13:33:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fujitsu.com; s=170520fj; t=1664112831; i=@fujitsu.com; bh=rWTztagXd3ebhKKtakvx6uZbv7eYUy2//ebuLJtL8JA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Lt7Piz77zrIHn3rVDAmF3B3G0FOeODoqbIlHD28UEvd+29YWSJqpUg+03a4asbXw+ /d7eA16vNiYO3mJTph8f7f8QIafRDPFFROTa4fI712OUb/fq2waP2JjdrhTumUZzlF 55sBCYZuizYesn7bCbXonmL8Got4dT8Gcsga2Cs3q0F2KzNgEB27A8OGwkORpzeSSy YRbKgRc8f9znc2KFmd88MS0xq96F5wxWU0foiNcxX0krTrwThqNJ7nOmEn8j04xcE8 2DX3R/gHfXTM3sXqPb4T03hsC4X5rnnO4s9mI/rCfQ1KjQe2vetPygaRY6nU0613tE s7s4o8UeuOllQ== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprPKsWRWlGSWpSXmKPExsViZ8ORpLsvwiD ZYNN8EYvpUy8wWmw5do/R4vITPovTExYxWezZe5LF4vKuOWwW99b8Z7XY9WcHu8XKH39YHTg9 Ti2S8Ni8Qstj8Z6XTB6bVnWyeWz6NInd48XmmYwenzfJBbBHsWbmJeVXJLBmrPr0jb1gr3LF6 oMT2BoYH8l2MXJxCAlsZJRYvOQsE4SzhEnizMObUM5eRomzC5aydDFycrAJ6EhcWPCXFSQhIj CJUeLYjZvMIAlmgQSJ9i/XmEBsYQE3idOb17CC2CwCqhKTXv9lBLF5BVwkrq3sYgOxJQQUJKY 8fA/WyyngKrF0yiqwXiGgmp69Z5kg6gUlTs58wgIxX0Li4IsXQPUcQL1KEjO74yHGVEg0Tj/E BGGrSVw9t4l5AqPgLCTds5B0L2BkWsVolVSUmZ5RkpuYmaNraGCga2hoqmuoa2RorpdYpZuol 1qqW55aXKJrqJdYXqyXWlysV1yZm5yTopeXWrKJERhLKcWMN3cwtvb91DvEKMnBpCTKe9TPIF mILyk/pTIjsTgjvqg0J7X4EKMMB4eSBO8BN6CcYFFqempFWmYOMK5h0hIcPEoivIUgrbzFBYm 5xZnpEKlTjMYcaxsO7GXmmDr7335mIZa8/LxUKXHeleFApQIgpRmleXCDYOnmEqOslDAvIwMD gxBPQWpRbmYJqvwrRnEORiVhXrdgoCk8mXklcPteAZ3CBHSKHZ8+yCkliQgpqQYm5YlNp2asv KSt9EDwypwXSSIbT05hbnCw8z3+8YX/sWaR6UVB+RcYMmc84HN1uhl90c/uda/uHa3jHe93dv Y1SQZfl/HL2a8b7tbV52jY8cVA1TnZweWWw62r/m7/5W41i+/1/3aaU8HsW3XsrJOiU81ZrKQ dL29r0vPS93E/kaM79Qa3lHu+u4Hn1pBZlwKOn/7HalFz7qmLWNEcr5L3uuzfT9ilClw3aXm0 6tnTS858RgpeaaoRimssb7aWrGqZbczCWm/Oo56nW7z1YId7z249iSdr1J9a9sV+4qz7VldYt baLVWLTatmJJmlf/UwktT3/mMkej/loZyIadPmBjPTuljjL/ATVBWxWSizFGYmGWsxFxYkAAW T7+7IDAAA= X-Env-Sender: ruansy.fnst@fujitsu.com X-Msg-Ref: server-4.tower-591.messagelabs.com!1664112830!124372!1 X-Originating-IP: [62.60.8.98] X-SYMC-ESS-Client-Auth: outbound-route-from=pass X-StarScan-Received: X-StarScan-Version: 9.87.3; banners=-,-,- X-VirusChecked: Checked Received: (qmail 27799 invoked from network); 25 Sep 2022 13:33:50 -0000 Received: from unknown (HELO n03ukasimr03.n03.fujitsu.local) (62.60.8.98) by server-4.tower-591.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 25 Sep 2022 13:33:50 -0000 Received: from n03ukasimr03.n03.fujitsu.local (localhost [127.0.0.1]) by n03ukasimr03.n03.fujitsu.local (Postfix) with ESMTP id DAE041AD; Sun, 25 Sep 2022 14:33:49 +0100 (BST) Received: from R01UKEXCASM121.r01.fujitsu.local (R01UKEXCASM121 [10.183.43.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by n03ukasimr03.n03.fujitsu.local (Postfix) with ESMTPS id CEF3D1AC; Sun, 25 Sep 2022 14:33:49 +0100 (BST) Received: from localhost.localdomain (10.167.225.141) by R01UKEXCASM121.r01.fujitsu.local (10.183.43.173) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Sun, 25 Sep 2022 14:33:46 +0100 From: Shiyang Ruan To: , , , , CC: , , , Subject: [PATCH 3/3] mm, pmem, xfs: Introduce MF_MEM_REMOVE for unbind Date: Sun, 25 Sep 2022 13:33:23 +0000 Message-ID: <1664112803-57-4-git-send-email-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1664112803-57-1-git-send-email-ruansy.fnst@fujitsu.com> References: <1664112803-57-1-git-send-email-ruansy.fnst@fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.225.141] X-ClientProxiedBy: G08CNEXCHPEKD07.g08.fujitsu.local (10.167.33.80) To R01UKEXCASM121.r01.fujitsu.local (10.183.43.173) X-Virus-Scanned: ClamAV using ClamSMTP ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1664112833; a=rsa-sha256; cv=none; b=EFmu095lgu487RIk+07MoDHoiZcgqCgcSEkvUYiFXnsNAT6us3FFDAnLs0CuwVLedW4SsJ jR9HzIiTCEI7qhfXBRru2BDRvj0ZwLnVq799cGAvS/Uq8MaSzZ92v4WcSYAt+3bNwpFAYv DKInQ9iwifldizeFpcRdOukW84cyEfI= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=fujitsu.com header.s=170520fj header.b=Lt7Piz77; dmarc=pass (policy=none) header.from=fujitsu.com; spf=pass (imf12.hostedemail.com: domain of ruansy.fnst@fujitsu.com designates 195.245.230.66 as permitted sender) smtp.mailfrom=ruansy.fnst@fujitsu.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1664112833; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=rWTztagXd3ebhKKtakvx6uZbv7eYUy2//ebuLJtL8JA=; b=tIUEE9HyqE4lZFYQi5puzZ+Vj3ibRVFLpnX9vyCizyFEzBGqzvKunlrCMAMQTcJDV3VWV0 yZ9zOgm8w2qnTCPgll2NW59ZGqEFeP8+87d8ZAE2bpn9kHd6WEes5eHTb5Qkoy6F5cnvhy WVGF6jV3JpP3NNDPISyz2NpQCTB+RDY= X-Rspam-User: X-Rspamd-Queue-Id: DBD7840002 X-Rspamd-Server: rspam08 X-Stat-Signature: chbriachm9hto5nypyyg45htfmwr6izx Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=fujitsu.com header.s=170520fj header.b=Lt7Piz77; dmarc=pass (policy=none) header.from=fujitsu.com; spf=pass (imf12.hostedemail.com: domain of ruansy.fnst@fujitsu.com designates 195.245.230.66 as permitted sender) smtp.mailfrom=ruansy.fnst@fujitsu.com X-HE-Tag: 1664112832-806028 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch is inspired by Dan's "mm, dax, pmem: Introduce dev_pagemap_failure()"[1]. With the help of dax_holder and ->notify_failure() mechanism, the pmem driver is able to ask filesystem (or mapped device) on it to unmap all files in use and notify processes who are using those files. Call trace: trigger unbind -> unbind_store() -> ... (skip) -> devres_release_all() # was pmem driver ->remove() in v1 -> kill_dax() -> dax_holder_notify_failure(dax_dev, 0, U64_MAX, MF_MEM_PRE_REMOVE) -> xfs_dax_notify_failure() Introduce MF_MEM_PRE_REMOVE to let filesystem know this is a remove event. So do not shutdown filesystem directly if something not supported, or if failure range includes metadata area. Make sure all files and processes are handled correctly. [1]: https://lore.kernel.org/linux-mm/161604050314.1463742.14151665140035795571.stgit@dwillia2-desk3.amr.corp.intel.com/ Signed-off-by: Shiyang Ruan --- drivers/dax/super.c | 3 ++- fs/xfs/xfs_notify_failure.c | 28 +++++++++++++++++++++++++++- include/linux/mm.h | 1 + 3 files changed, 30 insertions(+), 2 deletions(-) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 9b5e2a5eb0ae..cf9a64563fbe 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -323,7 +323,8 @@ void kill_dax(struct dax_device *dax_dev) return; if (dax_dev->holder_data != NULL) - dax_holder_notify_failure(dax_dev, 0, U64_MAX, 0); + dax_holder_notify_failure(dax_dev, 0, U64_MAX, + MF_MEM_PRE_REMOVE); clear_bit(DAXDEV_ALIVE, &dax_dev->flags); synchronize_srcu(&dax_srcu); diff --git a/fs/xfs/xfs_notify_failure.c b/fs/xfs/xfs_notify_failure.c index 3830f908e215..5c1e678a1285 100644 --- a/fs/xfs/xfs_notify_failure.c +++ b/fs/xfs/xfs_notify_failure.c @@ -22,6 +22,7 @@ #include #include +#include struct xfs_failure_info { xfs_agblock_t startblock; @@ -77,6 +78,9 @@ xfs_dax_failure_fn( if (XFS_RMAP_NON_INODE_OWNER(rec->rm_owner) || (rec->rm_flags & (XFS_RMAP_ATTR_FORK | XFS_RMAP_BMBT_BLOCK))) { + /* The device is about to be removed. Not a really failure. */ + if (notify->mf_flags & MF_MEM_PRE_REMOVE) + return 0; notify->want_shutdown = true; return 0; } @@ -168,7 +172,9 @@ xfs_dax_notify_ddev_failure( xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK); if (!error) error = -EFSCORRUPTED; - } + } else if (mf_flags & MF_MEM_PRE_REMOVE) + xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); + return error; } @@ -182,12 +188,24 @@ xfs_dax_notify_failure( struct xfs_mount *mp = dax_holder(dax_dev); u64 ddev_start; u64 ddev_end; + int error; if (!(mp->m_super->s_flags & SB_BORN)) { xfs_warn(mp, "filesystem is not ready for notify_failure()!"); return -EIO; } + if (mf_flags & MF_MEM_PRE_REMOVE) { + xfs_info(mp, "device is about to be removed!"); + down_write(&mp->m_super->s_umount); + error = sync_filesystem(mp->m_super); + /* invalidate_inode_pages2() invalidates dax mapping */ + super_drop_pagecache(mp->m_super, invalidate_inode_pages2); + up_write(&mp->m_super->s_umount); + if (error) + return error; + } + if (mp->m_rtdev_targp && mp->m_rtdev_targp->bt_daxdev == dax_dev) { xfs_debug(mp, "notify_failure() not supported on realtime device!"); @@ -196,6 +214,8 @@ xfs_dax_notify_failure( if (mp->m_logdev_targp && mp->m_logdev_targp->bt_daxdev == dax_dev && mp->m_logdev_targp != mp->m_ddev_targp) { + if (mf_flags & MF_MEM_PRE_REMOVE) + return 0; xfs_err(mp, "ondisk log corrupt, shutting down fs!"); xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK); return -EFSCORRUPTED; @@ -209,6 +229,12 @@ xfs_dax_notify_failure( ddev_start = mp->m_ddev_targp->bt_dax_part_off; ddev_end = ddev_start + bdev_nr_bytes(mp->m_ddev_targp->bt_bdev) - 1; + /* Notify failure on the whole device */ + if (offset == 0 && len == U64_MAX) { + offset = ddev_start; + len = bdev_nr_bytes(mp->m_ddev_targp->bt_bdev); + } + /* Ignore the range out of filesystem area */ if (offset + len - 1 < ddev_start) return -ENXIO; diff --git a/include/linux/mm.h b/include/linux/mm.h index 21f8b27bd9fd..9122a1c57dd2 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3183,6 +3183,7 @@ enum mf_flags { MF_UNPOISON = 1 << 4, MF_SW_SIMULATED = 1 << 5, MF_NO_RETRY = 1 << 6, + MF_MEM_PRE_REMOVE = 1 << 7, }; int mf_dax_kill_procs(struct address_space *mapping, pgoff_t index, unsigned long count, int mf_flags);