block: remove support for cryptoloop and the xor transfer

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Support for cyrptoloop 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).  The XOR transfer has never been more than a toy to demonstrate
the transfer in the bad old times of crypto export restrictions.
Remove them as they have some nasty interactions with loop device life
times due to the iteration over all loop devices in
loop_unregister_transfer.

Suggested-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211019075639.2333969-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

This commit is contained in:

Christoph Hellwig 2021-10-19 09:56:39 +02:00 • committed by Jens Axboe

parent 83b863f4a3

commit 47e9624616

5 changed files with 26 additions and 610 deletions

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23

drivers/block/Kconfig

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1

drivers/block/Makefile

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206

drivers/block/cryptoloop.c

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376

drivers/block/loop.c

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30

drivers/block/loop.h

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