crypto: support multiple threads accessing one QCryptoBlock

The two thing that should be handled are cipher and ivgen. For ivgen
the solution is just mutex, as iv calculations should not be long in
comparison with encryption/decryption. And for cipher let's just keep
per-thread ciphers.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/block/crypto.c b/block/crypto.c
index 33ee01b..f0a5f6b 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -229,6 +229,7 @@ static int block_crypto_open_generic(QCryptoBlockFormat format,
                                        block_crypto_read_func,
                                        bs,
                                        cflags,
+                                       1,
                                        errp);
 
     if (!crypto->block) {