virtio-crypto: Support asynchronous mode

virtio-crypto: Modify the current interface of virtio-crypto
device to support asynchronous mode.

Signed-off-by: lei he <helei.sig11@bytedance.com>
Message-Id: <20221008085030.70212-2-helei.sig11@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 51 insertions, 18 deletions

diff --git a/backends/cryptodev-builtin.c b/backends/cryptodev-builtin.c
index 125cbad1d3..cda6ca3b71 100644
--- a/backends/cryptodev-builtin.c
+++ b/backends/cryptodev-builtin.c
@@ -355,42 +355,62 @@ static int cryptodev_builtin_create_akcipher_session(
     return index;
 }
 
-static int64_t cryptodev_builtin_create_session(
+static int cryptodev_builtin_create_session(
            CryptoDevBackend *backend,
            CryptoDevBackendSessionInfo *sess_info,
-           uint32_t queue_index, Error **errp)
+           uint32_t queue_index,
+           CryptoDevCompletionFunc cb,
+           void *opaque)
 {
     CryptoDevBackendBuiltin *builtin =
                       CRYPTODEV_BACKEND_BUILTIN(backend);
     CryptoDevBackendSymSessionInfo *sym_sess_info;
     CryptoDevBackendAsymSessionInfo *asym_sess_info;
+    int ret, status;
+    Error *local_error = NULL;
 
     switch (sess_info->op_code) {
     case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
         sym_sess_info = &sess_info->u.sym_sess_info;
-        return cryptodev_builtin_create_cipher_session(
-                           builtin, sym_sess_info, errp);
+        ret = cryptodev_builtin_create_cipher_session(
+                    builtin, sym_sess_info, &local_error);
+        break;
 
     case VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION:
         asym_sess_info = &sess_info->u.asym_sess_info;
-        return cryptodev_builtin_create_akcipher_session(
-                           builtin, asym_sess_info, errp);
+        ret = cryptodev_builtin_create_akcipher_session(
+                           builtin, asym_sess_info, &local_error);
+        break;
 
     case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
     case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
     default:
-        error_setg(errp, "Unsupported opcode :%" PRIu32 "",
+        error_setg(&local_error, "Unsupported opcode :%" PRIu32 "",
                    sess_info->op_code);
-        return -1;
+        return -VIRTIO_CRYPTO_NOTSUPP;
     }
 
-    return -1;
+    if (local_error) {
+        error_report_err(local_error);
+    }
+    if (ret < 0) {
+        status = -VIRTIO_CRYPTO_ERR;
+    } else {
+        sess_info->session_id = ret;
+        status = VIRTIO_CRYPTO_OK;
+    }
+    if (cb) {
+        cb(opaque, status);
+    }
+    return 0;
 }
 
 static int cryptodev_builtin_close_session(
            CryptoDevBackend *backend,
            uint64_t session_id,
-           uint32_t queue_index, Error **errp)
+           uint32_t queue_index,
+           CryptoDevCompletionFunc cb,
+           void *opaque)
 {
     CryptoDevBackendBuiltin *builtin =
                       CRYPTODEV_BACKEND_BUILTIN(backend);
@@ -407,6 +427,9 @@ static int cryptodev_builtin_close_session(
 
     g_free(session);
     builtin->sessions[session_id] = NULL;
+    if (cb) {
+        cb(opaque, VIRTIO_CRYPTO_OK);
+    }
     return 0;
 }
 
@@ -506,7 +529,9 @@ static int cryptodev_builtin_asym_operation(
 static int cryptodev_builtin_operation(
                  CryptoDevBackend *backend,
                  CryptoDevBackendOpInfo *op_info,
-                 uint32_t queue_index, Error **errp)
+                 uint32_t queue_index,
+                 CryptoDevCompletionFunc cb,
+                 void *opaque)
 {
     CryptoDevBackendBuiltin *builtin =
                       CRYPTODEV_BACKEND_BUILTIN(backend);
@@ -514,11 +539,12 @@ static int cryptodev_builtin_operation(
     CryptoDevBackendSymOpInfo *sym_op_info;
     CryptoDevBackendAsymOpInfo *asym_op_info;
     enum CryptoDevBackendAlgType algtype = op_info->algtype;
-    int ret = -VIRTIO_CRYPTO_ERR;
+    int status = -VIRTIO_CRYPTO_ERR;
+    Error *local_error = NULL;
 
     if (op_info->session_id >= MAX_NUM_SESSIONS ||
               builtin->sessions[op_info->session_id] == NULL) {
-        error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
+        error_setg(&local_error, "Cannot find a valid session id: %" PRIu64 "",
                    op_info->session_id);
         return -VIRTIO_CRYPTO_INVSESS;
     }
@@ -526,14 +552,21 @@ static int cryptodev_builtin_operation(
     sess = builtin->sessions[op_info->session_id];
     if (algtype == CRYPTODEV_BACKEND_ALG_SYM) {
         sym_op_info = op_info->u.sym_op_info;
-        ret = cryptodev_builtin_sym_operation(sess, sym_op_info, errp);
+        status = cryptodev_builtin_sym_operation(sess, sym_op_info,
+                                                 &local_error);
     } else if (algtype == CRYPTODEV_BACKEND_ALG_ASYM) {
         asym_op_info = op_info->u.asym_op_info;
-        ret = cryptodev_builtin_asym_operation(sess, op_info->op_code,
-                                               asym_op_info, errp);
+        status = cryptodev_builtin_asym_operation(sess, op_info->op_code,
+                                                  asym_op_info, &local_error);
     }
 
-    return ret;
+    if (local_error) {
+        error_report_err(local_error);
+    }
+    if (cb) {
+        cb(opaque, status);
+    }
+    return 0;
 }
 
 static void cryptodev_builtin_cleanup(
@@ -548,7 +581,7 @@ static void cryptodev_builtin_cleanup(
 
     for (i = 0; i < MAX_NUM_SESSIONS; i++) {
         if (builtin->sessions[i] != NULL) {
-            cryptodev_builtin_close_session(backend, i, 0, &error_abort);
+            cryptodev_builtin_close_session(backend, i, 0, NULL, NULL);
         }
     }