linux/drivers/block/drbd
Kees Cook 3d0e63754f drbd: Convert from ahash to shash
In preparing to remove all stack VLA usage from the kernel[1], this
removes the discouraged use of AHASH_REQUEST_ON_STACK in favor of
the smaller SHASH_DESC_ON_STACK by converting from ahash-wrapped-shash
to direct shash. By removing a layer of indirection this both improves
performance and reduces stack usage. The stack allocation will be made
a fixed size in a later patch to the crypto subsystem.

The bulk of the lines in this change are simple s/ahash/shash/, but the
main logic differences are in drbd_csum_ee() and drbd_csum_bio(), which
externalizes the page walking with k(un)map_atomic() instead of using
scattergather.

[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com

Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-09-06 15:12:24 -06:00
..
drbd_actlog.c block: replace bi_bdev with a gendisk pointer and partitions index 2017-08-23 12:49:55 -06:00
drbd_bitmap.c drbd: convert to bioset_init()/mempool_init() 2018-05-30 15:33:32 -06:00
drbd_debugfs.c block drivers/block: Use octal not symbolic permissions 2018-05-24 13:38:59 -06:00
drbd_debugfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_int.h drbd: Convert from ahash to shash 2018-09-06 15:12:24 -06:00
drbd_interval.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_interval.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_main.c drbd: Convert from ahash to shash 2018-09-06 15:12:24 -06:00
drbd_nl.c drbd: Convert from ahash to shash 2018-09-06 15:12:24 -06:00
drbd_nla.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_nla.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_proc.c drbd: switch to proc_create_single 2018-05-16 07:24:30 +02:00
drbd_protocol.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_receiver.c drbd: Convert from ahash to shash 2018-09-06 15:12:24 -06:00
drbd_req.c block: Add and use op_stat_group() for indexing disk_stat fields. 2018-07-18 08:44:20 -06:00
drbd_req.h drbd: convert to bioset_init()/mempool_init() 2018-05-30 15:33:32 -06:00
drbd_state_change.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_state.c drbd: fix potential deadlock when trying to detach during handshake 2017-08-29 15:34:45 -06:00
drbd_state.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_strings.c drbd: code cleanups without semantic changes 2016-06-13 21:43:07 -06:00
drbd_strings.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drbd_vli.h
drbd_worker.c drbd: Convert from ahash to shash 2018-09-06 15:12:24 -06:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00