linux-kernel - [PATCH 4.18 83/88] ext4: show test_dummy_encryption mount option in /proc/mounts

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Date:   Thu, 27 Sep 2018 11:04:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Biggers <ebiggers@...gle.com>,
        Theodore Tso <tytso@....edu>
Subject: [PATCH 4.18 83/88] ext4: show test_dummy_encryption mount option in /proc/mounts

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers@...gle.com>

commit 338affb548c243d2af25b1ca628e67819350de6b upstream.

When in effect, add "test_dummy_encryption" to _ext4_show_options() so
that it is shown in /proc/mounts and other relevant procfs files.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ext4/super.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2126,6 +2126,8 @@ static int _ext4_show_options(struct seq
 		SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb);
 	if (test_opt(sb, DATA_ERR_ABORT))
 		SEQ_OPTS_PUTS("data_err=abort");
+	if (DUMMY_ENCRYPTION_ENABLED(sbi))
+		SEQ_OPTS_PUTS("test_dummy_encryption");
 
 	ext4_show_quota_options(seq, sb);
 	return 0;