+ nilfs2-do-not-propagate-enoent-error-from-nilfs_sufile_mark_dirty.patch added to mm-nonmm-unstable branch

+ nilfs2-do-not-propagate-enoent-error-from-nilfs_sufile_mark_dirty.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: nilfs2: do not propagate ENOENT error from nilfs_sufile_mark_dirty()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     nilfs2-do-not-propagate-enoent-error-from-nilfs_sufile_mark_dirty.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/nilfs2-do-not-propagate-enoent-error-from-nilfs_sufile_mark_dirty.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Subject: nilfs2: do not propagate ENOENT error from nilfs_sufile_mark_dirty()
Date: Thu, 22 Aug 2024 00:46:27 +0900

nilfs_sufile_mark_dirty(), which marks a block in the sufile metadata file
as dirty in preparation for log writing, returns -ENOENT to the caller if
the block containing the segment usage of the specified segment is
missing.

This internal code can propagate through the log writer to system calls
such as fsync.  To prevent this, treat this case as a filesystem error and
return -EIO instead.

Link: https://lkml.kernel.org/r/20240821154627.11848-6-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/nilfs2/sufile.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/fs/nilfs2/sufile.c~nilfs2-do-not-propagate-enoent-error-from-nilfs_sufile_mark_dirty
+++ a/fs/nilfs2/sufile.c
@@ -513,8 +513,15 @@ int nilfs_sufile_mark_dirty(struct inode
 
 	down_write(&NILFS_MDT(sufile)->mi_sem);
 	ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0, &bh);
-	if (ret)
+	if (unlikely(ret)) {
+		if (ret == -ENOENT) {
+			nilfs_error(sufile->i_sb,
+				    "segment usage for segment %llu is unreadable due to a hole block",
+				    (unsigned long long)segnum);
+			ret = -EIO;
+		}
 		goto out_sem;
+	}
 
 	kaddr = kmap_local_page(bh->b_page);
 	su = nilfs_sufile_block_get_segment_usage(sufile, segnum, bh, kaddr);
_

Patches currently in -mm which might be from konishi.ryusuke@gmail.com are

nilfs2-protect-references-to-superblock-parameters-exposed-in-sysfs.patch
nilfs2-fix-missing-cleanup-on-rollforward-recovery-error.patch
nilfs2-fix-state-management-in-error-path-of-log-writing-function.patch
nilfs2-add-support-for-fs_ioc_getuuid.patch
nilfs2-add-support-for-fs_ioc_getfssysfspath.patch
nilfs2-add-support-for-fs_ioc_getfslabel.patch
nilfs2-add-support-for-fs_ioc_setfslabel.patch
nilfs2-do-not-output-warnings-when-clearing-dirty-buffers.patch
nilfs2-add-missing-argument-description-for-__nilfs_error.patch
nilfs2-add-missing-argument-descriptions-for-ioctl-related-helpers.patch
nilfs2-improve-kernel-doc-comments-for-b-tree-node-helpers.patch
nilfs2-fix-incorrect-kernel-doc-declaration-of-nilfs_palloc_req-structure.patch
nilfs2-add-missing-description-of-nilfs_btree_path-structure.patch
nilfs2-describe-the-members-of-nilfs_bmap_operations-structure.patch
nilfs2-fix-inconsistencies-in-kernel-doc-comments-in-segmenth.patch
nilfs2-fix-missing-initial-short-descriptions-of-kernel-doc-comments.patch
nilfs2-treat-missing-sufile-header-block-as-metadata-corruption.patch
nilfs2-treat-missing-cpfile-header-block-as-metadata-corruption.patch
nilfs2-do-not-propagate-enoent-error-from-sufile-during-recovery.patch
nilfs2-do-not-propagate-enoent-error-from-sufile-during-gc.patch
nilfs2-do-not-propagate-enoent-error-from-nilfs_sufile_mark_dirty.patch