crypto: make loaded property read-only

The ``loaded=on`` option in the command line or QMP ``object-add`` either had
no effect (if ``loaded`` was the last option) or caused options to be
effectively ignored as if they were not given.  The property is therefore
useless and was deprecated in 6.0; make it read-only now.

The patch is best reviewed with "-b".

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

6 files changed, 58 insertions, 109 deletions

diff --git a/crypto/secret_common.c b/crypto/secret_common.c
index 714a15d5e5..3441c44ca8 100644
--- a/crypto/secret_common.c
+++ b/crypto/secret_common.c
@@ -138,36 +138,44 @@ static void qcrypto_secret_decode(const uint8_t *input,
 
 
 static void
-qcrypto_secret_prop_set_loaded(Object *obj,
-                               bool value,
-                               Error **errp)
+qcrypto_secret_complete(UserCreatable *uc, Error **errp)
 {
-    QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj);
+    QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(uc);
     QCryptoSecretCommonClass *sec_class
-                                = QCRYPTO_SECRET_COMMON_GET_CLASS(obj);
-
-    if (value) {
-        Error *local_err = NULL;
-        uint8_t *input = NULL;
-        size_t inputlen = 0;
-        uint8_t *output = NULL;
-        size_t outputlen = 0;
-
-        if (sec_class->load_data) {
-            sec_class->load_data(secret, &input, &inputlen, &local_err);
-            if (local_err) {
-                error_propagate(errp, local_err);
-                return;
-            }
-        } else {
-            error_setg(errp, "%s provides no 'load_data' method'",
-                             object_get_typename(obj));
+                                = QCRYPTO_SECRET_COMMON_GET_CLASS(uc);
+
+    Error *local_err = NULL;
+    uint8_t *input = NULL;
+    size_t inputlen = 0;
+    uint8_t *output = NULL;
+    size_t outputlen = 0;
+
+    if (sec_class->load_data) {
+        sec_class->load_data(secret, &input, &inputlen, &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
             return;
         }
+    } else {
+        error_setg(errp, "%s provides no 'load_data' method'",
+                         object_get_typename(OBJECT(uc)));
+        return;
+    }
 
-        if (secret->keyid) {
-            qcrypto_secret_decrypt(secret, input, inputlen,
-                                   &output, &outputlen, &local_err);
+    if (secret->keyid) {
+        qcrypto_secret_decrypt(secret, input, inputlen,
+                               &output, &outputlen, &local_err);
+        g_free(input);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            return;
+        }
+        input = output;
+        inputlen = outputlen;
+    } else {
+        if (secret->format == QCRYPTO_SECRET_FORMAT_BASE64) {
+            qcrypto_secret_decode(input, inputlen,
+                                  &output, &outputlen, &local_err);
             g_free(input);
             if (local_err) {
                 error_propagate(errp, local_err);
@@ -175,26 +183,11 @@ qcrypto_secret_prop_set_loaded(Object *obj,
             }
             input = output;
             inputlen = outputlen;
-        } else {
-            if (secret->format == QCRYPTO_SECRET_FORMAT_BASE64) {
-                qcrypto_secret_decode(input, inputlen,
-                                      &output, &outputlen, &local_err);
-                g_free(input);
-                if (local_err) {
-                    error_propagate(errp, local_err);
-                    return;
-                }
-                input = output;
-                inputlen = outputlen;
-            }
         }
-
-        secret->rawdata = input;
-        secret->rawlen = inputlen;
-    } else if (secret->rawdata) {
-        error_setg(errp, "Cannot unload secret");
-        return;
     }
+
+    secret->rawdata = input;
+    secret->rawlen = inputlen;
 }
 
 
@@ -269,13 +262,6 @@ qcrypto_secret_prop_get_keyid(Object *obj,
 
 
 static void
-qcrypto_secret_complete(UserCreatable *uc, Error **errp)
-{
-    object_property_set_bool(OBJECT(uc), "loaded", true, errp);
-}
-
-
-static void
 qcrypto_secret_finalize(Object *obj)
 {
     QCryptoSecretCommon *secret = QCRYPTO_SECRET_COMMON(obj);
@@ -294,7 +280,7 @@ qcrypto_secret_class_init(ObjectClass *oc, void *data)
 
     object_class_property_add_bool(oc, "loaded",
                                    qcrypto_secret_prop_get_loaded,
-                                   qcrypto_secret_prop_set_loaded);
+                                   NULL);
     object_class_property_add_enum(oc, "format",
                                    "QCryptoSecretFormat",
                                    &QCryptoSecretFormat_lookup,
diff --git a/crypto/tlscredsanon.c b/crypto/tlscredsanon.c
index 6fb83639ec..c0d23a0ef3 100644
--- a/crypto/tlscredsanon.c
+++ b/crypto/tlscredsanon.c
@@ -119,16 +119,11 @@ qcrypto_tls_creds_anon_unload(QCryptoTLSCredsAnon *creds G_GNUC_UNUSED)
 
 
 static void
-qcrypto_tls_creds_anon_prop_set_loaded(Object *obj,
-                                       bool value,
-                                       Error **errp)
+qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp)
 {
-    QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
+    QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(uc);
 
-    qcrypto_tls_creds_anon_unload(creds);
-    if (value) {
-        qcrypto_tls_creds_anon_load(creds, errp);
-    }
+    qcrypto_tls_creds_anon_load(creds, errp);
 }
 
 
@@ -164,13 +159,6 @@ qcrypto_tls_creds_anon_prop_get_loaded(Object *obj G_GNUC_UNUSED,
 
 
 static void
-qcrypto_tls_creds_anon_complete(UserCreatable *uc, Error **errp)
-{
-    object_property_set_bool(OBJECT(uc), "loaded", true, errp);
-}
-
-
-static void
 qcrypto_tls_creds_anon_finalize(Object *obj)
 {
     QCryptoTLSCredsAnon *creds = QCRYPTO_TLS_CREDS_ANON(obj);
@@ -188,7 +176,7 @@ qcrypto_tls_creds_anon_class_init(ObjectClass *oc, void *data)
 
     object_class_property_add_bool(oc, "loaded",
                                    qcrypto_tls_creds_anon_prop_get_loaded,
-                                   qcrypto_tls_creds_anon_prop_set_loaded);
+                                   NULL);
 }
 
 
diff --git a/crypto/tlscredspsk.c b/crypto/tlscredspsk.c
index 752f2d92be..a4f9891274 100644
--- a/crypto/tlscredspsk.c
+++ b/crypto/tlscredspsk.c
@@ -188,16 +188,11 @@ qcrypto_tls_creds_psk_unload(QCryptoTLSCredsPSK *creds G_GNUC_UNUSED)
 
 
 static void
-qcrypto_tls_creds_psk_prop_set_loaded(Object *obj,
-                                      bool value,
-                                      Error **errp)
+qcrypto_tls_creds_psk_complete(UserCreatable *uc, Error **errp)
 {
-    QCryptoTLSCredsPSK *creds = QCRYPTO_TLS_CREDS_PSK(obj);
+    QCryptoTLSCredsPSK *creds = QCRYPTO_TLS_CREDS_PSK(uc);
 
-    qcrypto_tls_creds_psk_unload(creds);
-    if (value) {
-        qcrypto_tls_creds_psk_load(creds, errp);
-    }
+    qcrypto_tls_creds_psk_load(creds, errp);
 }
 
 
@@ -233,13 +228,6 @@ qcrypto_tls_creds_psk_prop_get_loaded(Object *obj G_GNUC_UNUSED,
 
 
 static void
-qcrypto_tls_creds_psk_complete(UserCreatable *uc, Error **errp)
-{
-    object_property_set_bool(OBJECT(uc), "loaded", true, errp);
-}
-
-
-static void
 qcrypto_tls_creds_psk_finalize(Object *obj)
 {
     QCryptoTLSCredsPSK *creds = QCRYPTO_TLS_CREDS_PSK(obj);
@@ -276,7 +264,7 @@ qcrypto_tls_creds_psk_class_init(ObjectClass *oc, void *data)
 
     object_class_property_add_bool(oc, "loaded",
                                    qcrypto_tls_creds_psk_prop_get_loaded,
-                                   qcrypto_tls_creds_psk_prop_set_loaded);
+                                   NULL);
     object_class_property_add_str(oc, "username",
                                   qcrypto_tls_creds_psk_prop_get_username,
                                   qcrypto_tls_creds_psk_prop_set_username);
diff --git a/crypto/tlscredsx509.c b/crypto/tlscredsx509.c
index 32948a6bdc..d14313925d 100644
--- a/crypto/tlscredsx509.c
+++ b/crypto/tlscredsx509.c
@@ -687,16 +687,11 @@ qcrypto_tls_creds_x509_unload(QCryptoTLSCredsX509 *creds G_GNUC_UNUSED)
 
 
 static void
-qcrypto_tls_creds_x509_prop_set_loaded(Object *obj,
-                                       bool value,
-                                       Error **errp)
+qcrypto_tls_creds_x509_complete(UserCreatable *uc, Error **errp)
 {
-    QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj);
+    QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(uc);
 
-    qcrypto_tls_creds_x509_unload(creds);
-    if (value) {
-        qcrypto_tls_creds_x509_load(creds, errp);
-    }
+    qcrypto_tls_creds_x509_load(creds, errp);
 }
 
 
@@ -815,13 +810,6 @@ qcrypto_tls_creds_x509_reload(QCryptoTLSCreds *creds, Error **errp)
 
 
 static void
-qcrypto_tls_creds_x509_complete(UserCreatable *uc, Error **errp)
-{
-    object_property_set_bool(OBJECT(uc), "loaded", true, errp);
-}
-
-
-static void
 qcrypto_tls_creds_x509_init(Object *obj)
 {
     QCryptoTLSCredsX509 *creds = QCRYPTO_TLS_CREDS_X509(obj);
@@ -852,7 +840,7 @@ qcrypto_tls_creds_x509_class_init(ObjectClass *oc, void *data)
 
     object_class_property_add_bool(oc, "loaded",
                                    qcrypto_tls_creds_x509_prop_get_loaded,
-                                   qcrypto_tls_creds_x509_prop_set_loaded);
+                                   NULL);
     object_class_property_add_bool(oc, "sanity-check",
                                    qcrypto_tls_creds_x509_prop_get_sanity,
                                    qcrypto_tls_creds_x509_prop_set_sanity);
diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 44f52c172d..2a022f2300 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -99,16 +99,6 @@ other options have been processed.  This will either have no effect (if
 ``opened`` was the last option) or cause errors.  The property is therefore
 useless and should not be specified.
 
-``loaded`` property of ``secret`` and ``secret_keyring`` objects (since 6.0)
-''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
-
-The only effect of specifying ``loaded=on`` in the command line or QMP
-``object-add`` is that the secret is loaded immediately, possibly before all
-other options have been processed.  This will either have no effect (if
-``loaded`` was the last option) or cause options to be effectively ignored as
-if they were not given.  The property is therefore useless and should not be
-specified.
-
 ``-display sdl,window_close=...`` (since 6.1)
 '''''''''''''''''''''''''''''''''''''''''''''
 
diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index ba78bc1a19..81ceeb9000 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -355,6 +355,15 @@ The ``-writeconfig`` option was not able to serialize the entire contents
 of the QEMU command line.  It is thus considered a failed experiment
 and removed without a replacement.
 
+``loaded`` property of ``secret`` and ``secret_keyring`` objects (removed in 7.1)
+'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+The ``loaded=on`` option in the command line or QMP ``object-add`` either had
+no effect (if ``loaded`` was the last option) or caused options to be
+effectively ignored as if they were not given.  The property is therefore
+useless and should simply be removed.
+
+
 QEMU Machine Protocol (QMP) commands
 ------------------------------------