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ext4: add unmount filesystem message

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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>
This commit is contained in:
Zhang Yi 2022-04-12 22:53:20 +08:00 committed by Theodore Ts'o
parent 784a09951c
commit 4808cb5b98
1 changed files with 3 additions and 0 deletions
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3
fs/ext4/super.c
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@ -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);