root / backends / rng.c @ dccfcd0e
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/*
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* QEMU Random Number Generator Backend
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*
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* Copyright IBM, Corp. 2012
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "sysemu/rng.h" |
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#include "qapi/qmp/qerror.h" |
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void rng_backend_request_entropy(RngBackend *s, size_t size,
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EntropyReceiveFunc *receive_entropy, |
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void *opaque)
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{
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RngBackendClass *k = RNG_BACKEND_GET_CLASS(s); |
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if (k->request_entropy) {
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k->request_entropy(s, size, receive_entropy, opaque); |
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} |
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} |
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void rng_backend_cancel_requests(RngBackend *s)
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{
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RngBackendClass *k = RNG_BACKEND_GET_CLASS(s); |
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if (k->cancel_requests) {
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k->cancel_requests(s); |
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} |
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} |
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static bool rng_backend_prop_get_opened(Object *obj, Error **errp) |
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{
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RngBackend *s = RNG_BACKEND(obj); |
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return s->opened;
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} |
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void rng_backend_open(RngBackend *s, Error **errp)
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{
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object_property_set_bool(OBJECT(s), true, "opened", errp); |
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} |
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static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp) |
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{
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RngBackend *s = RNG_BACKEND(obj); |
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RngBackendClass *k = RNG_BACKEND_GET_CLASS(s); |
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if (value == s->opened) {
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return;
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} |
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if (!value && s->opened) {
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error_set(errp, QERR_PERMISSION_DENIED); |
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return;
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} |
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if (k->opened) {
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k->opened(s, errp); |
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} |
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if (!error_is_set(errp)) {
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s->opened = value; |
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} |
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} |
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static void rng_backend_init(Object *obj) |
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{
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object_property_add_bool(obj, "opened",
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rng_backend_prop_get_opened, |
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rng_backend_prop_set_opened, |
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NULL);
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} |
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static const TypeInfo rng_backend_info = { |
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.name = TYPE_RNG_BACKEND, |
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.parent = TYPE_OBJECT, |
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.instance_size = sizeof(RngBackend),
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.instance_init = rng_backend_init, |
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.class_size = sizeof(RngBackendClass),
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.abstract = true,
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}; |
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static void register_types(void) |
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{
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type_register_static(&rng_backend_info); |
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} |
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type_init(register_types); |