The patch below does not apply to the 4.19-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@vger.kernel.org.
Possible dependencies:
89481b5fa8c0 ("ext4: correct inconsistent error msg in nojournal mode") 43bd6f1b49b6 ("ext4: goto right label 'failed_mount3a'")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 89481b5fa8c0640e62ba84c6020cee895f7ac643 Mon Sep 17 00:00:00 2001 From: Baokun Li libaokun1@huawei.com Date: Wed, 9 Nov 2022 15:43:43 +0800 Subject: [PATCH] ext4: correct inconsistent error msg in nojournal mode
When we used the journal_async_commit mounting option in nojournal mode, the kernel told me that "can't mount with journal_checksum", was very confusing. I find that when we mount with journal_async_commit, both the JOURNAL_ASYNC_COMMIT and EXPLICIT_JOURNAL_CHECKSUM flags are set. However, in the error branch, CHECKSUM is checked before ASYNC_COMMIT. As a result, the above inconsistency occurs, and the ASYNC_COMMIT branch becomes dead code that cannot be executed. Therefore, we exchange the positions of the two judgments to make the error msg more accurate.
Signed-off-by: Baokun Li libaokun1@huawei.com Reviewed-by: Jan Kara jack@suse.cz Link: https://lore.kernel.org/r/20221109074343.4184862-1-libaokun1@huawei.com Signed-off-by: Theodore Ts'o tytso@mit.edu Cc: stable@kernel.org
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index f5e6919ea650..878be47faaaf 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5288,14 +5288,15 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) goto failed_mount3a; } else { /* Nojournal mode, all journal mount options are illegal */ - if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { + if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { ext4_msg(sb, KERN_ERR, "can't mount with " - "journal_checksum, fs mounted w/o journal"); + "journal_async_commit, fs mounted w/o journal"); goto failed_mount3a; } - if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { + + if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { ext4_msg(sb, KERN_ERR, "can't mount with " - "journal_async_commit, fs mounted w/o journal"); + "journal_checksum, fs mounted w/o journal"); goto failed_mount3a; } if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {