This patchset will check if the cipher can support bulk mode, then dm-crypt will handle different ways to send requests to crypto layer according to cipher mode. For bulk mode, we can use sg table to map the whole bio and send all scatterlists of one bio to crypto engine to encrypt or decrypt, which can improve the hardware engine's efficiency. As Milan pointed out we need one driver with using the new 'CRYPTO_ALG_BULK' flag, I'll add one cipher engine driver with 'CRYPTO_ALG_BULK' flag to test this optimization in next version, if I am sure this optimization is on the right direction according to your comments. Looking forward to any comments and suggestions. Thanks. Changes since v1: - Refactor the blk_bio_map_sg() function to avoid duplicated code. - Move the sg table allocation to crypt_ctr_cipher() function to avoid memory allocation in the IO path. - Remove the crypt_sg_entry() function. - Other optimization. Baolin Wang (3): block: Introduce blk_bio_map_sg() to map one bio crypto: Introduce CRYPTO_ALG_BULK flag md: dm-crypt: Introduce the bulk mode method when sending request block/blk-merge.c | 36 +++++++++-- drivers/md/dm-crypt.c | 145 ++++++++++++++++++++++++++++++++++++++++++++- include/crypto/skcipher.h | 7 +++ include/linux/blkdev.h | 2 + include/linux/crypto.h | 6 ++ 5 files changed, 190 insertions(+), 6 deletions(-) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
