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From: Christoph Hellwig <hch@lst.de>
To: axboe@kernel.dk
Cc: linux-block@vger.kernel.org
Subject: [PATCH for-5.14] cryptoloop: add a deprecation warning
Date: Fri, 27 Aug 2021 18:32:50 +0200	[thread overview]
Message-ID: <20210827163250.255325-1-hch@lst.de> (raw)

Support for cryptoloop has been officially marked broken and deprecated
in favor of dm-crypt (which supports the same broken algorithms if
needed) in Linux 2.6.4 (released in March 2004), and support for it has
been entirely removed from losetup in util-linux 2.23 (released in April
2013).  Add a warning and a deprecation schedule.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/block/Kconfig      | 4 ++--
 drivers/block/cryptoloop.c | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 63056cfd4b62c..fbb3a558139fc 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -213,7 +213,7 @@ config BLK_DEV_LOOP_MIN_COUNT
 	  dynamically allocated with the /dev/loop-control interface.
 
 config BLK_DEV_CRYPTOLOOP
-	tristate "Cryptoloop Support"
+	tristate "Cryptoloop Support (DEPRECATED)"
 	select CRYPTO
 	select CRYPTO_CBC
 	depends on BLK_DEV_LOOP
@@ -225,7 +225,7 @@ config BLK_DEV_CRYPTOLOOP
 	  WARNING: This device is not safe for journaled file systems like
 	  ext3 or Reiserfs. Please use the Device Mapper crypto module
 	  instead, which can be configured to be on-disk compatible with the
-	  cryptoloop device.
+	  cryptoloop device.  cryptoloop support will be removed in Linux 5.16.
 
 source "drivers/block/drbd/Kconfig"
 
diff --git a/drivers/block/cryptoloop.c b/drivers/block/cryptoloop.c
index 3cabc335ae744..f0a91faa43a89 100644
--- a/drivers/block/cryptoloop.c
+++ b/drivers/block/cryptoloop.c
@@ -189,6 +189,8 @@ init_cryptoloop(void)
 
 	if (rc)
 		printk(KERN_ERR "cryptoloop: loop_register_transfer failed\n");
+	else
+		pr_warn("the cryptoloop driver has been deprecated and will be removed in in Linux 5.16\n");
 	return rc;
 }
 
-- 
2.30.2


             reply	other threads:[~2021-08-27 16:33 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27 16:32 Christoph Hellwig [this message]
2021-08-27 16:37 ` Jens Axboe
2021-08-27 16:40   ` Christoph Hellwig
2021-08-27 16:42     ` Jens Axboe
2021-08-27 16:43       ` Christoph Hellwig
2021-08-27 16:43         ` Jens Axboe
2021-08-27 16:46           ` Christoph Hellwig
2021-08-27 16:48             ` Jens Axboe
2021-08-27 16:50               ` Christoph Hellwig
2021-08-27 16:52                 ` Jens Axboe
2021-08-27 16:55                   ` Christoph Hellwig
2021-08-27 16:57                     ` Jens Axboe

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