hostmem-file: add offset option

[mirror_qemu.git] / backends / rng.c

diff --git a/backends/rng.c b/backends/rng.c
index 2f2f3ee4ebac76a5c69195534b78c81e1a77a989..9bbd0c77b6959f2fc03c4fc77908a8237de09b5a 100644 (file)
--- a/backends/rng.c
+++ b/backends/rng.c
@@ -12,7 +12,8 @@
 
 #include "qemu/osdep.h"
 #include "sysemu/rng.h"
-#include "qapi/qmp/qerror.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
 #include "qom/object_interfaces.h"
 
 void rng_backend_request_entropy(RngBackend *s, size_t size,
@@ -20,9 +21,20 @@ void rng_backend_request_entropy(RngBackend *s, size_t size,
                                  void *opaque)
 {
     RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
+    RngRequest *req;
 
     if (k->request_entropy) {
-        k->request_entropy(s, size, receive_entropy, opaque);
+        req = g_malloc(sizeof(*req));
+
+        req->offset = 0;
+        req->size = size;
+        req->receive_entropy = receive_entropy;
+        req->opaque = opaque;
+        req->data = g_malloc(req->size);
+
+        k->request_entropy(s, req);
+
+        QSIMPLEQ_INSERT_TAIL(&s->requests, req, next);
     }
 }
 
@@ -35,24 +47,10 @@ static bool rng_backend_prop_get_opened(Object *obj, Error **errp)
 
 static void rng_backend_complete(UserCreatable *uc, Error **errp)
 {
-    object_property_set_bool(OBJECT(uc), true, "opened", errp);
-}
-
-static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp)
-{
-    RngBackend *s = RNG_BACKEND(obj);
+    RngBackend *s = RNG_BACKEND(uc);
     RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
     Error *local_err = NULL;
 
-    if (value == s->opened) {
-        return;
-    }
-
-    if (!value && s->opened) {
-        error_setg(errp, QERR_PERMISSION_DENIED);
-        return;
-    }
-
     if (k->opened) {
         k->opened(s, &local_err);
         if (local_err) {
@@ -64,12 +62,41 @@ static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp)
     s->opened = true;
 }
 
+static void rng_backend_free_request(RngRequest *req)
+{
+    g_free(req->data);
+    g_free(req);
+}
+
+static void rng_backend_free_requests(RngBackend *s)
+{
+    RngRequest *req, *next;
+
+    QSIMPLEQ_FOREACH_SAFE(req, &s->requests, next, next) {
+        rng_backend_free_request(req);
+    }
+
+    QSIMPLEQ_INIT(&s->requests);
+}
+
+void rng_backend_finalize_request(RngBackend *s, RngRequest *req)
+{
+    QSIMPLEQ_REMOVE(&s->requests, req, RngRequest, next);
+    rng_backend_free_request(req);
+}
+
 static void rng_backend_init(Object *obj)
 {
-    object_property_add_bool(obj, "opened",
-                             rng_backend_prop_get_opened,
-                             rng_backend_prop_set_opened,
-                             NULL);
+    RngBackend *s = RNG_BACKEND(obj);
+
+    QSIMPLEQ_INIT(&s->requests);
+}
+
+static void rng_backend_finalize(Object *obj)
+{
+    RngBackend *s = RNG_BACKEND(obj);
+
+    rng_backend_free_requests(s);
 }
 
 static void rng_backend_class_init(ObjectClass *oc, void *data)
@@ -77,6 +104,10 @@ static void rng_backend_class_init(ObjectClass *oc, void *data)
     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 
     ucc->complete = rng_backend_complete;
+
+    object_class_property_add_bool(oc, "opened",
+                                   rng_backend_prop_get_opened,
+                                   NULL);
 }
 
 static const TypeInfo rng_backend_info = {
@@ -84,6 +115,7 @@ static const TypeInfo rng_backend_info = {
     .parent = TYPE_OBJECT,
     .instance_size = sizeof(RngBackend),
     .instance_init = rng_backend_init,
+    .instance_finalize = rng_backend_finalize,
     .class_size = sizeof(RngBackendClass),
     .class_init = rng_backend_class_init,
     .abstract = true,