linux-kernel - [PATCH v2] fs: ubifs: set s_uuid in super block to support ima/evm uuid options

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Date:   Tue, 16 Feb 2021 08:23:34 +0100
From:   Juergen Borleis <jbe@...gutronix.de>
To:     Richard Weinberger <richard@....at>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
        kernel@...gutronix.de,
        Steffen Trumtrar <s.trumtrar@...gutronix.de>,
        Oleksij Rempel <o.rempel@...gutronix.de>
Subject: [PATCH v2] fs: ubifs: set s_uuid in super block to support ima/evm uuid options

From: Steffen Trumtrar <s.trumtrar@...gutronix.de>

This is required to provide uuid based integrity functionality for:
ima_policy (fsuuid option) and the 'evmctl' command ('--uuid' option).

Co-developed-by: Oleksij Rempel <o.rempel@...gutronix.de>
Co-developed-by: Juergen Borleis <jbe@...gutronix.de>
Signed-off-by: Steffen Trumtrar <s.trumtrar@...gutronix.de>
---
 fs/ubifs/super.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 138b9426c6c1..a8383ca39a47 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2230,6 +2230,8 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
 		goto out_umount;
 	}
 
+	import_uuid(&sb->s_uuid, c->uuid);
+
 	mutex_unlock(&c->umount_mutex);
 	return 0;
 
-- 
2.20.1