From 8ac0f15f335b8b58e974fb7a9d193ba56ea18542 Mon Sep 17 00:00:00 2001 From: Vladimir Sementsov-Ogievskiy Date: Mon, 6 May 2019 17:27:41 +0300 Subject: qcow2: do encryption in threads Do encryption/decryption in threads, like it is already done for compression. This improves asynchronous encrypted io. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Alberto Garcia Reviewed-by: Max Reitz Message-id: 20190506142741.41731-9-vsementsov@virtuozzo.com Signed-off-by: Max Reitz --- block/qcow2-threads.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 63 insertions(+), 2 deletions(-) (limited to 'block/qcow2-threads.c') diff --git a/block/qcow2-threads.c b/block/qcow2-threads.c index 650aa2ed19..3b1e63fe41 100644 --- a/block/qcow2-threads.c +++ b/block/qcow2-threads.c @@ -30,8 +30,7 @@ #include "qcow2.h" #include "block/thread-pool.h" - -#define QCOW2_MAX_THREADS 4 +#include "crypto.h" static int coroutine_fn qcow2_co_process(BlockDriverState *bs, ThreadPoolFunc *func, void *arg) @@ -205,3 +204,65 @@ qcow2_co_decompress(BlockDriverState *bs, void *dest, size_t dest_size, return qcow2_co_do_compress(bs, dest, dest_size, src, src_size, qcow2_decompress); } + + +/* + * Cryptography + */ + +/* + * Qcow2EncDecFunc: common prototype of qcrypto_block_encrypt() and + * qcrypto_block_decrypt() functions. + */ +typedef int (*Qcow2EncDecFunc)(QCryptoBlock *block, uint64_t offset, + uint8_t *buf, size_t len, Error **errp); + +typedef struct Qcow2EncDecData { + QCryptoBlock *block; + uint64_t offset; + uint8_t *buf; + size_t len; + + Qcow2EncDecFunc func; +} Qcow2EncDecData; + +static int qcow2_encdec_pool_func(void *opaque) +{ + Qcow2EncDecData *data = opaque; + + return data->func(data->block, data->offset, data->buf, data->len, NULL); +} + +static int coroutine_fn +qcow2_co_encdec(BlockDriverState *bs, uint64_t file_cluster_offset, + uint64_t offset, void *buf, size_t len, Qcow2EncDecFunc func) +{ + BDRVQcow2State *s = bs->opaque; + Qcow2EncDecData arg = { + .block = s->crypto, + .offset = s->crypt_physical_offset ? + file_cluster_offset + offset_into_cluster(s, offset) : + offset, + .buf = buf, + .len = len, + .func = func, + }; + + return qcow2_co_process(bs, qcow2_encdec_pool_func, &arg); +} + +int coroutine_fn +qcow2_co_encrypt(BlockDriverState *bs, uint64_t file_cluster_offset, + uint64_t offset, void *buf, size_t len) +{ + return qcow2_co_encdec(bs, file_cluster_offset, offset, buf, len, + qcrypto_block_encrypt); +} + +int coroutine_fn +qcow2_co_decrypt(BlockDriverState *bs, uint64_t file_cluster_offset, + uint64_t offset, void *buf, size_t len) +{ + return qcow2_co_encdec(bs, file_cluster_offset, offset, buf, len, + qcrypto_block_decrypt); +} -- cgit v1.2.3