linux-kernel - [PATCH 7/7] ext4: show 'shutdown' hint when ext4 is forced to shutdown

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <20250117082315.2869996-8-libaokun@huaweicloud.com>
Date: Fri, 17 Jan 2025 16:23:15 +0800
From: libaokun@...weicloud.com
To: linux-ext4@...r.kernel.org
Cc: tytso@....edu,
	adilger.kernel@...ger.ca,
	jack@...e.cz,
	linux-kernel@...r.kernel.org,
	yi.zhang@...wei.com,
	yangerkun@...wei.com,
	libaokun@...weicloud.com,
	Baokun Li <libaokun1@...wei.com>
Subject: [PATCH 7/7] ext4: show 'shutdown' hint when ext4 is forced to shutdown

From: Baokun Li <libaokun1@...wei.com>

Now, if dmesg is cleared, we have no way of knowing if the file system has
been shutdown. Moreover, ext4 allows directory reads even after the file
system has been shutdown, so when reading a file returns -EIO, we cannot
determine whether this is a hardware issue or if the file system has been
shutdown.

Therefore, when ext4 file system is shutdown, we're adding a 'shutdown'
hint to commands like mount so users can easily check the file system's
status.

Signed-off-by: Baokun Li <libaokun1@...wei.com>
---
 fs/ext4/super.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2377ebf0aff1..b15c36df934c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3032,6 +3032,9 @@ static int _ext4_show_options(struct seq_file *seq, struct super_block *sb,
 	if (ext4_emergency_ro(sb))
 		SEQ_OPTS_PUTS("emergency_ro");

+	if (ext4_forced_shutdown(sb))
+		SEQ_OPTS_PUTS("shutdown");
+
 	ext4_show_quota_options(seq, sb);
 	return 0;
 }
-- 
2.39.2