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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"
19
20void rng_backend_request_entropy(RngBackend *s, size_t size,
21 EntropyReceiveFunc *receive_entropy,
22 void *opaque)
23{
24 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
25 RngRequest *req;
26
27 if (k->request_entropy) {
28 req = g_malloc(sizeof(*req));
29
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);
35
36 k->request_entropy(s, req);
37
38 QSIMPLEQ_INSERT_TAIL(&s->requests, req, next);
39 }
40}
41
42static bool rng_backend_prop_get_opened(Object *obj, Error **errp)
43{
44 RngBackend *s = RNG_BACKEND(obj);
45
46 return s->opened;
47}
48
49static void rng_backend_complete(UserCreatable *uc, Error **errp)
50{
51 RngBackend *s = RNG_BACKEND(uc);
52 RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
53 Error *local_err = NULL;
54
55 if (k->opened) {
56 k->opened(s, &local_err);
57 if (local_err) {
58 error_propagate(errp, local_err);
59 return;
60 }
61 }
62
63 s->opened = true;
64}
65
66static void rng_backend_free_request(RngRequest *req)
67{
68 g_free(req->data);
69 g_free(req);
70}
71
72static void rng_backend_free_requests(RngBackend *s)
73{
74 RngRequest *req, *next;
75
76 QSIMPLEQ_FOREACH_SAFE(req, &s->requests, next, next) {
77 rng_backend_free_request(req);
78 }
79
80 QSIMPLEQ_INIT(&s->requests);
81}
82
83void rng_backend_finalize_request(RngBackend *s, RngRequest *req)
84{
85 QSIMPLEQ_REMOVE(&s->requests, req, RngRequest, next);
86 rng_backend_free_request(req);
87}
88
89static void rng_backend_init(Object *obj)
90{
91 RngBackend *s = RNG_BACKEND(obj);
92
93 QSIMPLEQ_INIT(&s->requests);
94}
95
96static void rng_backend_finalize(Object *obj)
97{
98 RngBackend *s = RNG_BACKEND(obj);
99
100 rng_backend_free_requests(s);
101}
102
103static void rng_backend_class_init(ObjectClass *oc, void *data)
104{
105 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
106
107 ucc->complete = rng_backend_complete;
108
109 object_class_property_add_bool(oc, "opened",
110 rng_backend_prop_get_opened,
111 NULL);
112}
113
114static 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,
122 .abstract = true,
123 .interfaces = (InterfaceInfo[]) {
124 { TYPE_USER_CREATABLE },
125 { }
126 }
127};
128
129static void register_types(void)
130{
131 type_register_static(&rng_backend_info);
132}
133
134type_init(register_types);
135