2 * QEMU Random Number Generator Backend
4 * Copyright IBM, Corp. 2012
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
13 #include "qemu/osdep.h"
14 #include "sysemu/rng.h"
15 #include "qapi/error.h"
16 #include "qapi/qmp/qerror.h"
17 #include "qemu/module.h"
18 #include "qom/object_interfaces.h"
20 void rng_backend_request_entropy(RngBackend *s, size_t size,
21 EntropyReceiveFunc *receive_entropy,
24 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
27 if (k->request_entropy) {
28 req = g_malloc(sizeof(*req));
32 req->receive_entropy = receive_entropy;
34 req->data = g_malloc(req->size);
36 k->request_entropy(s, req);
38 QSIMPLEQ_INSERT_TAIL(&s->requests, req, next);
42 static bool rng_backend_prop_get_opened(Object *obj, Error **errp)
44 RngBackend *s = RNG_BACKEND(obj);
49 static void rng_backend_complete(UserCreatable *uc, Error **errp)
51 RngBackend *s = RNG_BACKEND(uc);
52 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
53 Error *local_err = NULL;
56 k->opened(s, &local_err);
58 error_propagate(errp, local_err);
66 static void rng_backend_free_request(RngRequest *req)
72 static void rng_backend_free_requests(RngBackend *s)
74 RngRequest *req, *next;
76 QSIMPLEQ_FOREACH_SAFE(req, &s->requests, next, next) {
77 rng_backend_free_request(req);
80 QSIMPLEQ_INIT(&s->requests);
83 void rng_backend_finalize_request(RngBackend *s, RngRequest *req)
85 QSIMPLEQ_REMOVE(&s->requests, req, RngRequest, next);
86 rng_backend_free_request(req);
89 static void rng_backend_init(Object *obj)
91 RngBackend *s = RNG_BACKEND(obj);
93 QSIMPLEQ_INIT(&s->requests);
96 static void rng_backend_finalize(Object *obj)
98 RngBackend *s = RNG_BACKEND(obj);
100 rng_backend_free_requests(s);
103 static void rng_backend_class_init(ObjectClass *oc, void *data)
105 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
107 ucc->complete = rng_backend_complete;
109 object_class_property_add_bool(oc, "opened",
110 rng_backend_prop_get_opened,
114 static const TypeInfo rng_backend_info = {
115 .name = TYPE_RNG_BACKEND,
116 .parent = TYPE_OBJECT,
117 .instance_size = sizeof(RngBackend),
118 .instance_init = rng_backend_init,
119 .instance_finalize = rng_backend_finalize,
120 .class_size = sizeof(RngBackendClass),
121 .class_init = rng_backend_class_init,
123 .interfaces = (InterfaceInfo[]) {
124 { TYPE_USER_CREATABLE },
129 static void register_types(void)
131 type_register_static(&rng_backend_info);
134 type_init(register_types);