rng: move request queue cleanup from RngEgd to RngBackend
[qemu/kevin.git] / backends / rng.c
blob014cb9d0fe724b961648c5235f27d03d017820d0
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/qmp/qerror.h"
16 #include "qom/object_interfaces.h"
18 void rng_backend_request_entropy(RngBackend *s, size_t size,
19 EntropyReceiveFunc *receive_entropy,
20 void *opaque)
22 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
24 if (k->request_entropy) {
25 k->request_entropy(s, size, receive_entropy, opaque);
29 static bool rng_backend_prop_get_opened(Object *obj, Error **errp)
31 RngBackend *s = RNG_BACKEND(obj);
33 return s->opened;
36 static void rng_backend_complete(UserCreatable *uc, Error **errp)
38 object_property_set_bool(OBJECT(uc), true, "opened", errp);
41 static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp)
43 RngBackend *s = RNG_BACKEND(obj);
44 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
45 Error *local_err = NULL;
47 if (value == s->opened) {
48 return;
51 if (!value && s->opened) {
52 error_setg(errp, QERR_PERMISSION_DENIED);
53 return;
56 if (k->opened) {
57 k->opened(s, &local_err);
58 if (local_err) {
59 error_propagate(errp, local_err);
60 return;
64 s->opened = true;
67 static void rng_backend_free_request(RngRequest *req)
69 g_free(req->data);
70 g_free(req);
73 static void rng_backend_free_requests(RngBackend *s)
75 GSList *i;
77 for (i = s->requests; i; i = i->next) {
78 rng_backend_free_request(i->data);
81 g_slist_free(s->requests);
82 s->requests = NULL;
85 void rng_backend_finalize_request(RngBackend *s, RngRequest *req)
87 s->requests = g_slist_remove(s->requests, req);
88 rng_backend_free_request(req);
91 static void rng_backend_init(Object *obj)
93 object_property_add_bool(obj, "opened",
94 rng_backend_prop_get_opened,
95 rng_backend_prop_set_opened,
96 NULL);
99 static void rng_backend_finalize(Object *obj)
101 RngBackend *s = RNG_BACKEND(obj);
103 rng_backend_free_requests(s);
106 static void rng_backend_class_init(ObjectClass *oc, void *data)
108 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
110 ucc->complete = rng_backend_complete;
113 static const TypeInfo rng_backend_info = {
114 .name = TYPE_RNG_BACKEND,
115 .parent = TYPE_OBJECT,
116 .instance_size = sizeof(RngBackend),
117 .instance_init = rng_backend_init,
118 .instance_finalize = rng_backend_finalize,
119 .class_size = sizeof(RngBackendClass),
120 .class_init = rng_backend_class_init,
121 .abstract = true,
122 .interfaces = (InterfaceInfo[]) {
123 { TYPE_USER_CREATABLE },
128 static void register_types(void)
130 type_register_static(&rng_backend_info);
133 type_init(register_types);