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cryptoloop: add a deprecation warning 

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>
Link: https://lore.kernel.org/r/20210827163250.255325-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-08-27 18:32:50 +02:00 committed by Jens Axboe
parent 3375dca0b5
commit 222013f9ac
2 changed files with 4 additions and 2 deletions
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4
drivers/block/Kconfig
View File

@ -213,7 +213,7 @@ config BLK_DEV_LOOP_MIN_COUNT
dynamically allocated with the /dev/loop-control interface. dynamically allocated with the /dev/loop-control interface.
config BLK_DEV_CRYPTOLOOP config BLK_DEV_CRYPTOLOOP
tristate "Cryptoloop Support" tristate "Cryptoloop Support (DEPRECATED)"
select CRYPTO select CRYPTO
select CRYPTO_CBC select CRYPTO_CBC
depends on BLK_DEV_LOOP depends on BLK_DEV_LOOP
@ -225,7 +225,7 @@ config BLK_DEV_CRYPTOLOOP
WARNING: This device is not safe for journaled file systems like WARNING: This device is not safe for journaled file systems like
ext3 or Reiserfs. Please use the Device Mapper crypto module ext3 or Reiserfs. Please use the Device Mapper crypto module
instead, which can be configured to be on-disk compatible with the 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" source "drivers/block/drbd/Kconfig"

2
drivers/block/cryptoloop.c
View File

@ -189,6 +189,8 @@ init_cryptoloop(void)
if (rc) if (rc)
printk(KERN_ERR "cryptoloop: loop_register_transfer failed\n"); 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; return rc;
} }