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qcow2: do encryption in threads

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Do encryption/decryption in threads, like it is already done for
compression. This improves asynchronous encrypted io.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190506142741.41731-9-vsementsov@virtuozzo.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2019-05-06 17:27:41 +03:00 • committed by Max Reitz
parent 5447c3a03f
commit 8ac0f15f33
4 changed files with 81 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

65
block/qcow2-threads.c
View file

@ -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);
}