hw/elf_ops: Fix a typo
[qemu/ar7.git] / backends / rng.c
blob3757b044855c64d8820c777766e8d19a1bbd77b3
1 /*
2 * QEMU Random Number Generator Backend
4 * Copyright IBM, Corp. 2012
6 * Authors:
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,
22 void *opaque)
24 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
25 RngRequest *req;
27 if (k->request_entropy) {
28 req = g_malloc(sizeof(*req));
30 req->offset = 0;
31 req->size = size;
32 req->receive_entropy = receive_entropy;
33 req->opaque = opaque;
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);
46 return s->opened;
49 static void rng_backend_complete(UserCreatable *uc, Error **errp)
51 object_property_set_bool(OBJECT(uc), "opened", true, errp);
54 static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp)
56 RngBackend *s = RNG_BACKEND(obj);
57 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
58 Error *local_err = NULL;
60 if (value == s->opened) {
61 return;
64 if (!value && s->opened) {
65 error_setg(errp, QERR_PERMISSION_DENIED);
66 return;
69 if (k->opened) {
70 k->opened(s, &local_err);
71 if (local_err) {
72 error_propagate(errp, local_err);
73 return;
77 s->opened = true;
80 static void rng_backend_free_request(RngRequest *req)
82 g_free(req->data);
83 g_free(req);
86 static void rng_backend_free_requests(RngBackend *s)
88 RngRequest *req, *next;
90 QSIMPLEQ_FOREACH_SAFE(req, &s->requests, next, next) {
91 rng_backend_free_request(req);
94 QSIMPLEQ_INIT(&s->requests);
97 void rng_backend_finalize_request(RngBackend *s, RngRequest *req)
99 QSIMPLEQ_REMOVE(&s->requests, req, RngRequest, next);
100 rng_backend_free_request(req);
103 static void rng_backend_init(Object *obj)
105 RngBackend *s = RNG_BACKEND(obj);
107 QSIMPLEQ_INIT(&s->requests);
110 static void rng_backend_finalize(Object *obj)
112 RngBackend *s = RNG_BACKEND(obj);
114 rng_backend_free_requests(s);
117 static void rng_backend_class_init(ObjectClass *oc, void *data)
119 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
121 ucc->complete = rng_backend_complete;
123 object_class_property_add_bool(oc, "opened",
124 rng_backend_prop_get_opened,
125 rng_backend_prop_set_opened);
128 static const TypeInfo rng_backend_info = {
129 .name = TYPE_RNG_BACKEND,
130 .parent = TYPE_OBJECT,
131 .instance_size = sizeof(RngBackend),
132 .instance_init = rng_backend_init,
133 .instance_finalize = rng_backend_finalize,
134 .class_size = sizeof(RngBackendClass),
135 .class_init = rng_backend_class_init,
136 .abstract = true,
137 .interfaces = (InterfaceInfo[]) {
138 { TYPE_USER_CREATABLE },
143 static void register_types(void)
145 type_register_static(&rng_backend_info);
148 type_init(register_types);