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banners=-,-,- X-VirusChecked: Checked Received: (qmail 6204 invoked from network); 17 Feb 2023 14:48:53 -0000 Received: from unknown (HELO n03ukasimr03.n03.fujitsu.local) (62.60.8.98) by server-17.tower-728.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Feb 2023 14:48:53 -0000 Received: from n03ukasimr03.n03.fujitsu.local (localhost [127.0.0.1]) by n03ukasimr03.n03.fujitsu.local (Postfix) with ESMTP id C36931B5; Fri, 17 Feb 2023 14:48:52 +0000 (GMT) Received: from R01UKEXCASM223.r01.fujitsu.local (R01UKEXCASM223 [10.182.185.121]) (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 B55641AC; Fri, 17 Feb 2023 14:48:52 +0000 (GMT) Received: from localhost.localdomain (10.167.225.141) by R01UKEXCASM223.r01.fujitsu.local (10.182.185.121) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 17 Feb 2023 14:48:48 +0000 From: Shiyang Ruan To: , , , CC: , , , , , , , Subject: [PATCH v10 1/3] xfs: fix the calculation of length and end Date: Fri, 17 Feb 2023 14:48:30 +0000 Message-ID: <1676645312-13-2-git-send-email-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1676645312-13-1-git-send-email-ruansy.fnst@fujitsu.com> References: <1676645312-13-1-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 R01UKEXCASM223.r01.fujitsu.local (10.182.185.121) X-Virus-Scanned: ClamAV using ClamSMTP X-Rspamd-Queue-Id: 09647160005 X-Stat-Signature: wdt8b1sfzzcyay4jc4s6gib5h7aasw3x X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1676645343-553907 X-HE-Meta: U2FsdGVkX18z1pcH8rQv3UIwe1ANEvNtYzeI/2V80FR4E4LudVbafABDeGM61VNOLjxeb1edRkv/wLdUPGUaFUYNYTDs2iaX7GnAsW4/lKxEgsuyHDRuOWPOWCSh30AQDlMn3C5UjB/ss9VmqUHvXQjbZ/4pCy4hWBy5kZM0ZCWPr8RYuElQq9VH+vsbWh6Cell0lHdp12M9I0zABqRZuCAtQmf2GPKfc4NitmUFnQ+XH2dEsnfF1N9WlIB7Glk+l8ogc/GKkDU4ITh0VPFe0pQvrzQpsuI3ZaGZf2mQo/EteFnocLcgCVFWDy7mrsrk3ZqtoNLMMwsWIAReiVU4QkcqiW5pzMrQhD/EZHNsPJFogMB7+DwEn+GeocMgXk/f+Aq3KLLSgg47RcDkBXEG3JNwLIHEaO/Iu0/7Vos+Yh6QSgm7BZ9pi97prtf0ieV1TmjJkuvDyYl6h6VncW0ADsqSgGIv5Yy/tel1/fNhP1/yHh+cobH0t0YekllAWJWlrei8wB6f5bM3dfKR8WFCdae8siPXapSdICtRYbFtXoQgpvjsUOnkTKv3Rhu9kvD6dmCNtKmtiCmBwO1L9j9VgDBFFtrL83X0VwZUvkcCJaIT8/MCUqmb7n+Nl7RhA8nlFpiYDXQNWSnMI2EV4CugpmxBNEBx6Ggfj9XUJYgVtGdoShAjtDKY4rIE6y6EijmPMCTq8XQaQVLJJaGSUflq2YLWrDXjk9N7wURDduAvUNXGDwQj5KKpZDyRww7l04xGJLgjtCfxoFXeWWXopI/pU1XWDms6OHpszsU1o+agLUXjwtMiyGAvxI8vvcK4ZNWQ4t4AzBVXD9bQ5OdZxHATddtFlU334z8j1wXbkShkNlB7xP2XLKq5nvZBGNhif20/biqIT/6PRtZ3VRV80xYue0aP/8yNGYkRbuZHtfCOts94ijhz3ugt9/AEMqN1s2BJBXccA7epFIHbW9dy4QA zruHdT3S anxo3bGuq65wDoU66y7tV3oMd1Q3DmLZqHr67WmVl9pAotgKkbyjHmBgh35xiXebBMf476Q6o6J3egvM1w+JTt/LiIAuxA8MW4BDy6VnYsqXHvBxUsRgK9jZPjPQHc328mt0qpfEuUXoVlW0vTmFQHXt/fhg7kg/mktILXs5OQqyQKFKFt+CLCm8ivjCTlhN5Vy38fI5/03TWwvUab3BQtnQt8jVVc5vR3bqWXxmY2wG6e84Dz+CowO7rD7ncmpKfbE2+ 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: The end should be start + length - 1. Also fix the calculation of the length when seeking for intersection of notify range and device. Signed-off-by: Shiyang Ruan Reviewed-by: Darrick J. Wong --- fs/xfs/xfs_notify_failure.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/xfs/xfs_notify_failure.c b/fs/xfs/xfs_notify_failure.c index c4078d0ec108..7d46a7e4980f 100644 --- a/fs/xfs/xfs_notify_failure.c +++ b/fs/xfs/xfs_notify_failure.c @@ -114,7 +114,7 @@ xfs_dax_notify_ddev_failure( int error = 0; xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, daddr); xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, fsbno); - xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp, daddr + bblen); + xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp, daddr + bblen - 1); xfs_agnumber_t end_agno = XFS_FSB_TO_AGNO(mp, end_fsbno); error = xfs_trans_alloc_empty(mp, &tp); @@ -210,7 +210,7 @@ xfs_dax_notify_failure( ddev_end = ddev_start + bdev_nr_bytes(mp->m_ddev_targp->bt_bdev) - 1; /* Ignore the range out of filesystem area */ - if (offset + len < ddev_start) + if (offset + len - 1 < ddev_start) return -ENXIO; if (offset > ddev_end) return -ENXIO; @@ -222,8 +222,8 @@ xfs_dax_notify_failure( len -= ddev_start - offset; offset = 0; } - if (offset + len > ddev_end) - len -= ddev_end - offset; + if (offset + len - 1 > ddev_end) + len = ddev_end - offset + 1; return xfs_dax_notify_ddev_failure(mp, BTOBB(offset), BTOBB(len), mf_flags); From patchwork Fri Feb 17 14:48:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiyang Ruan X-Patchwork-Id: 13144834 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 3519BC64EC4 for ; Fri, 17 Feb 2023 14:49:12 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CC4386B0075; Fri, 17 Feb 2023 09:49:11 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C75EF6B0078; Fri, 17 Feb 2023 09:49:11 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AC7316B007B; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 24964 invoked from network); 17 Feb 2023 14:48:57 -0000 Received: from unknown (HELO n03ukasimr02.n03.fujitsu.local) (62.60.8.146) by server-15.tower-732.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Feb 2023 14:48:57 -0000 Received: from n03ukasimr02.n03.fujitsu.local (localhost [127.0.0.1]) by n03ukasimr02.n03.fujitsu.local (Postfix) with ESMTP id 2DB181000DB; Fri, 17 Feb 2023 14:48:57 +0000 (GMT) Received: from R01UKEXCASM223.r01.fujitsu.local (R01UKEXCASM223 [10.182.185.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by n03ukasimr02.n03.fujitsu.local (Postfix) with ESMTPS id 210781000C1; Fri, 17 Feb 2023 14:48:57 +0000 (GMT) Received: from localhost.localdomain (10.167.225.141) by R01UKEXCASM223.r01.fujitsu.local (10.182.185.121) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 17 Feb 2023 14:48:52 +0000 From: Shiyang Ruan To: , , , CC: , , , , , , , Subject: [PATCH v10 2/3] fs: introduce super_drop_pagecache() Date: Fri, 17 Feb 2023 14:48:31 +0000 Message-ID: <1676645312-13-3-git-send-email-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1676645312-13-1-git-send-email-ruansy.fnst@fujitsu.com> References: <1676645312-13-1-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 R01UKEXCASM223.r01.fujitsu.local (10.182.185.121) X-Virus-Scanned: ClamAV using ClamSMTP X-Rspamd-Queue-Id: 0E6571C001D X-Stat-Signature: kthonw6dsos68ooydpef8pywn3n914hg X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1676645348-397336 X-HE-Meta: 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 DvD3PN13 SNQNkWS+65swmMtpVUQR8ywrAj/A6FtwyGU6FSNH6PSpuXdnJkwoNjN5bL6Mc/V/Zv9W9HCVofzP8GMEMbk5cPQwBrCfBazLr7rc/Y1wMn7kWo5exqU9qoacalL51P+V8Cy3+vcrSem1GLlA+439mzNKTPA9Go1VNjmv87642eBFxs4Oz3H1zkVVmcUde3prz55jgF96rCTaog6ndneI8qJDIHqn3dV7hVqKA3T4GfikAsDdyF3jdiffw7A== 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: xfs_notify_failure.c requires a method to invalidate all dax mappings. drop_pagecache_sb() can do this but it is a static function and only build with CONFIG_SYSCTL. Now, move its implementation into super.c and call it super_drop_pagecache(). Use its second argument as invalidator so that we can choose which invalidate method to use. Signed-off-by: Shiyang Ruan --- fs/drop_caches.c | 29 +-------------------------- fs/super.c | 43 +++++++++++++++++++++++++++++++++++++++++ include/linux/fs.h | 2 ++ include/linux/pagemap.h | 1 + mm/truncate.c | 20 +++++++++++++++++-- 5 files changed, 65 insertions(+), 30 deletions(-) diff --git a/fs/drop_caches.c b/fs/drop_caches.c index e619c31b6bd9..f88ce339b635 100644 --- a/fs/drop_caches.c +++ b/fs/drop_caches.c @@ -17,34 +17,7 @@ int sysctl_drop_caches; static void drop_pagecache_sb(struct super_block *sb, void *unused) { - struct inode *inode, *toput_inode = NULL; - - spin_lock(&sb->s_inode_list_lock); - list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { - spin_lock(&inode->i_lock); - /* - * We must skip inodes in unusual state. We may also skip - * inodes without pages but we deliberately won't in case - * we need to reschedule to avoid softlockups. - */ - if ((inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) || - (mapping_empty(inode->i_mapping) && !need_resched())) { - spin_unlock(&inode->i_lock); - continue; - } - __iget(inode); - spin_unlock(&inode->i_lock); - spin_unlock(&sb->s_inode_list_lock); - - invalidate_mapping_pages(inode->i_mapping, 0, -1); - iput(toput_inode); - toput_inode = inode; - - cond_resched(); - spin_lock(&sb->s_inode_list_lock); - } - spin_unlock(&sb->s_inode_list_lock); - iput(toput_inode); + super_drop_pagecache(sb, invalidate_inode_pages); } int drop_caches_sysctl_handler(struct ctl_table *table, int write, diff --git a/fs/super.c b/fs/super.c index 12c08cb20405..a403243b5513 100644 --- a/fs/super.c +++ b/fs/super.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include "internal.h" @@ -678,6 +679,48 @@ void drop_super_exclusive(struct super_block *sb) } EXPORT_SYMBOL(drop_super_exclusive); +/** + * super_drop_pagecache - drop all page caches of a filesystem + * @sb: superblock to invalidate + * @arg: invalidate method, such as invalidate_inode_pages(), + * invalidate_inode_pages2() + * + * Scans the inodes of a filesystem, drop all page caches. + */ +void super_drop_pagecache(struct super_block *sb, + int (*invalidator)(struct address_space *)) +{ + struct inode *inode, *toput_inode = NULL; + + spin_lock(&sb->s_inode_list_lock); + list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { + spin_lock(&inode->i_lock); + /* + * We must skip inodes in unusual state. We may also skip + * inodes without pages but we deliberately won't in case + * we need to reschedule to avoid softlockups. + */ + if ((inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) || + (mapping_empty(inode->i_mapping) && !need_resched())) { + spin_unlock(&inode->i_lock); + continue; + } + __iget(inode); + spin_unlock(&inode->i_lock); + spin_unlock(&sb->s_inode_list_lock); + + invalidator(inode->i_mapping); + iput(toput_inode); + toput_inode = inode; + + cond_resched(); + spin_lock(&sb->s_inode_list_lock); + } + spin_unlock(&sb->s_inode_list_lock); + iput(toput_inode); +} +EXPORT_SYMBOL(super_drop_pagecache); + static void __iterate_supers(void (*f)(struct super_block *)) { struct super_block *sb, *p = NULL; diff --git a/include/linux/fs.h b/include/linux/fs.h index c1769a2c5d70..fdcaa9bf85dd 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3308,6 +3308,8 @@ extern struct super_block *get_super(struct block_device *); extern struct super_block *get_active_super(struct block_device *bdev); extern void drop_super(struct super_block *sb); extern void drop_super_exclusive(struct super_block *sb); +void super_drop_pagecache(struct super_block *sb, + int (*invalidator)(struct address_space *)); extern void iterate_supers(void (*)(struct super_block *, void *), void *); extern void iterate_supers_type(struct file_system_type *, void (*)(struct super_block *, void *), void *); diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 29e1f9e76eb6..d0a180268baa 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -27,6 +27,7 @@ static inline void invalidate_remote_inode(struct inode *inode) S_ISLNK(inode->i_mode)) invalidate_mapping_pages(inode->i_mapping, 0, -1); } +int invalidate_inode_pages(struct address_space *mapping); int invalidate_inode_pages2(struct address_space *mapping); int invalidate_inode_pages2_range(struct address_space *mapping, pgoff_t start, pgoff_t end); diff --git a/mm/truncate.c b/mm/truncate.c index 7b4ea4c4a46b..131f2ab2d566 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -540,12 +540,13 @@ unsigned long invalidate_mapping_pagevec(struct address_space *mapping, } /** - * invalidate_mapping_pages - Invalidate all clean, unlocked cache of one inode + * invalidate_mapping_pages - Invalidate range of clean, unlocked cache of one + * inode * @mapping: the address_space which holds the cache to invalidate * @start: the offset 'from' which to invalidate * @end: the offset 'to' which to invalidate (inclusive) * - * This function removes pages that are clean, unmapped and unlocked, + * This function removes range of pages that are clean, unmapped and unlocked, * as well as shadow entries. It will not block on IO activity. * * If you want to remove all the pages of one inode, regardless of @@ -560,6 +561,21 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping, } EXPORT_SYMBOL(invalidate_mapping_pages); +/** + * invalidate_inode_pages - Invalidate all clean, unlocked cache of one inode + * @mapping: the address_space which holds the cache to invalidate + * + * This function removes all pages that are clean, unmapped and unlocked, + * as well as shadow entries. It will not block on IO activity. + */ +int invalidate_inode_pages(struct address_space *mapping) +{ + invalidate_mapping_pages(mapping, 0, -1); + + return 0; +} +EXPORT_SYMBOL(invalidate_inode_pages); + /* * This is like invalidate_inode_page(), except it ignores the page's * refcount. 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 14491 invoked from network); 17 Feb 2023 14:49:02 -0000 Received: from unknown (HELO n03ukasimr04.n03.fujitsu.local) (62.60.8.179) by server-7.tower-732.messagelabs.com with ECDHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 17 Feb 2023 14:49:02 -0000 Received: from n03ukasimr04.n03.fujitsu.local (localhost [127.0.0.1]) by n03ukasimr04.n03.fujitsu.local (Postfix) with ESMTP id 880897C; Fri, 17 Feb 2023 14:49:01 +0000 (GMT) Received: from R01UKEXCASM223.r01.fujitsu.local (R01UKEXCASM223 [10.182.185.121]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by n03ukasimr04.n03.fujitsu.local (Postfix) with ESMTPS id 7B7BE7B; Fri, 17 Feb 2023 14:49:01 +0000 (GMT) Received: from localhost.localdomain (10.167.225.141) by R01UKEXCASM223.r01.fujitsu.local (10.182.185.121) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Fri, 17 Feb 2023 14:48:57 +0000 From: Shiyang Ruan To: , , , CC: , , , , , , , Subject: [PATCH v10 3/3] mm, pmem, xfs: Introduce MF_MEM_REMOVE for unbind Date: Fri, 17 Feb 2023 14:48:32 +0000 Message-ID: <1676645312-13-4-git-send-email-ruansy.fnst@fujitsu.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1676645312-13-1-git-send-email-ruansy.fnst@fujitsu.com> References: <1676645312-13-1-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 R01UKEXCASM223.r01.fujitsu.local (10.182.185.121) X-Virus-Scanned: ClamAV using ClamSMTP X-Rspam-User: X-Rspamd-Queue-Id: 7F5AA140013 X-Rspamd-Server: rspam01 X-Stat-Signature: qnc4wckhy5m3rf4wuo5wb7dg44gwctu7 X-HE-Tag: 1676645344-396545 X-HE-Meta: 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 vywlJByi 3WtRLAcdAUy9Jis88ryIOJot9U581kJNk6E6k+Ym5nq3E01Py+sKkK3r051W1Jkt3qXCGycZDcnNza/p1fxba6euHBlXPrg9R57IZWKi4OdAH2RYwFenpHszKMzlS9OMGg2iltUar7s06c8OEhCc2jiA44ZaxgkNYGHQlr8b7ygPSt28Xw+wWltGkKNjpZTDP6n8+tL2e5WVI1K9vdck4p8DJFSaln7RBQCCMZml0ibNXKE8ejQRP8i4WbDdbFmgWxpHheIrzgc5UeFdBoJLmRZodq5UE9pIiABhQnEEohQ5u0u2iHNiDyMgly4RI/vqLQD9LCkxcKVPyh+o= 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 | 26 ++++++++++++++++++++++++++ include/linux/mm.h | 1 + 3 files changed, 29 insertions(+), 1 deletion(-) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index c4c4728a36e4..2e1a35e82fce 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 7d46a7e4980f..5f915cfc9632 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 +172,11 @@ xfs_dax_notify_ddev_failure( xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_ONDISK); if (!error) error = -EFSCORRUPTED; + } else if (mf_flags & MF_MEM_PRE_REMOVE) { + error = thaw_super(mp->m_super); + xfs_force_shutdown(mp, SHUTDOWN_FORCE_UMOUNT); } + return error; } @@ -182,6 +190,7 @@ 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()!"); @@ -196,6 +205,8 @@ 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 +220,12 @@ 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; @@ -225,6 +242,15 @@ xfs_dax_notify_failure( if (offset + len - 1 > ddev_end) len = ddev_end - offset + 1; + if (mf_flags & MF_MEM_PRE_REMOVE) { + xfs_info(mp, "device is about to be removed!"); + error = freeze_super(mp->m_super); + if (error) + return error; + /* invalidate_inode_pages2() invalidates dax mapping */ + super_drop_pagecache(mp->m_super, invalidate_inode_pages2); + } + return xfs_dax_notify_ddev_failure(mp, BTOBB(offset), BTOBB(len), mf_flags); } diff --git a/include/linux/mm.h b/include/linux/mm.h index 8f857163ac89..9711dbc9451f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3424,6 +3424,7 @@ 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);