ext4: add unmount filesystem message
authorZhang Yi <yi.zhang@huawei.com>
Tue, 12 Apr 2022 14:53:20 +0000 (22:53 +0800)
committerTheodore Ts'o <tytso@mit.edu>
Fri, 13 May 2022 21:00:39 +0000 (17:00 -0400)
Now that we have kernel message at mount time, system administrator
could acquire the mount time, device and options easily. But we don't
have corresponding unmounting message at umount time, so we cannot know
if someone umount a filesystem easily. Some of the modern filesystems
(e.g. xfs) have the umounting kernel message, so add one for ext4
filesystem for convenience.

 EXT4-fs (sdb): mounted filesystem with ordered data mode. Quota mode: none.
 EXT4-fs (sdb): unmounting filesystem.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220412145320.2669897-1-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
fs/ext4/super.c

index b70ab3d3165daf5ee01eff853ed277617ed6310e..b511203f7111f55b8bba9167dd1dc7400b7085ce 100644 (file)
@@ -1211,6 +1211,9 @@ static void ext4_put_super(struct super_block *sb)
         */
        ext4_unregister_sysfs(sb);
 
+       if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount"))
+               ext4_msg(sb, KERN_INFO, "unmounting filesystem.");
+
        ext4_unregister_li_request(sb);
        ext4_quota_off_umount(sb);