diff options
authorChristoph Hellwig <>2021-08-27 18:32:50 +0200
committerJens Axboe <>2021-08-27 10:44:54 -0600
commit222013f9ac30b9cec44301daa8dbd0aae38abffb (patch)
parent3375dca0b542c747d29655cf52f7b2741ecebe0e (diff)
cryptoloop: add a deprecation warningblock-5.14-2021-08-27block-5.14
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 <> Link: Signed-off-by: Jens Axboe <>
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 63056cfd4b62..fbb3a558139f 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.
- tristate "Cryptoloop Support"
+ tristate "Cryptoloop Support (DEPRECATED)"
select CRYPTO
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 3cabc335ae74..f0a91faa43a8 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;