The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
Possible dependencies:
9b6641dd95a0 ("ext4: fix super block checksum incorrect after mount")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 9b6641dd95a0c441b277dd72ba22fed8d61f76ad Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@xxxxxxxxxx>
Date: Wed, 25 May 2022 09:29:04 +0800
Subject: [PATCH] ext4: fix super block checksum incorrect after mount
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit
We got issue as follows:
[home]# mount /dev/sda test
EXT4-fs (sda): warning: mounting fs with errors, running e2fsck is recommended
[home]# dmesg
EXT4-fs (sda): warning: mounting fs with errors, running e2fsck is recommended
EXT4-fs (sda): Errors on filesystem, clearing orphan list.
EXT4-fs (sda): recovery complete
EXT4-fs (sda): mounted filesystem with ordered data mode. Quota mode: none.
[home]# debugfs /dev/sda
debugfs 1.46.5 (30-Dec-2021)
Checksum errors in superblock! Retrying...
Reason is ext4_orphan_cleanup will reset ‘s_last_orphan’ but not update
super block checksum.
To solve above issue, defer update super block checksum after
ext4_orphan_cleanup.
Signed-off-by: Ye Bin <yebin10@xxxxxxxxxx>
Cc: stable@xxxxxxxxxx
Reviewed-by: Jan Kara <jack@xxxxxxx>
Reviewed-by: Ritesh Harjani <ritesh.list@xxxxxxxxx>
Link: https://lore.kernel.org/r/20220525012904.1604737-1-yebin10@xxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index b2ecae8adbfc..13d562d11235 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5302,14 +5302,6 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
err = percpu_counter_init(&sbi->s_freeinodes_counter, freei,
GFP_KERNEL);
}
- /*
- * Update the checksum after updating free space/inode
- * counters. Otherwise the superblock can have an incorrect
- * checksum in the buffer cache until it is written out and
- * e2fsprogs programs trying to open a file system immediately
- * after it is mounted can fail.
- */
- ext4_superblock_csum_set(sb);
if (!err)
err = percpu_counter_init(&sbi->s_dirs_counter,
ext4_count_dirs(sb), GFP_KERNEL);
@@ -5367,6 +5359,14 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;
ext4_orphan_cleanup(sb, es);
EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;
+ /*
+ * Update the checksum after updating free space/inode counters and
+ * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect
+ * checksum in the buffer cache until it is written out and
+ * e2fsprogs programs trying to open a file system immediately
+ * after it is mounted can fail.
+ */
+ ext4_superblock_csum_set(sb);
if (needs_recovery) {
ext4_msg(sb, KERN_INFO, "recovery complete");
err = ext4_mark_recovery_complete(sb, es);
