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-rw-r--r--qapi/block-core.json96
-rw-r--r--qapi/event.json4
-rw-r--r--qapi/opts-visitor.c23
-rw-r--r--qapi/qapi-visit-core.c8
-rw-r--r--qapi/qmp-dispatch.c34
-rw-r--r--qapi/qmp-registry.c37
-rw-r--r--qapi/qobject-input-visitor.c209
-rw-r--r--qapi/string-input-visitor.c97
-rw-r--r--qapi/trace-events1
9 files changed, 331 insertions, 178 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 5f82d35fab..bc0ccd615c 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1304,6 +1304,11 @@
 #
 # @speed:  #optional the maximum speed, in bytes per second
 #
+# @filter-node-name: #optional the node name that should be assigned to the
+#                    filter driver that the commit job inserts into the graph
+#                    above @top. If this option is not given, a node name is
+#                    autogenerated. (Since: 2.9)
+#
 # Returns: Nothing on success
 #          If commit or stream is already active on this device, DeviceInUse
 #          If @device does not exist, DeviceNotFound
@@ -1323,7 +1328,8 @@
 ##
 { 'command': 'block-commit',
   'data': { '*job-id': 'str', 'device': 'str', '*base': 'str', '*top': 'str',
-            '*backing-file': 'str', '*speed': 'int' } }
+            '*backing-file': 'str', '*speed': 'int',
+            '*filter-node-name': 'str' } }
 
 ##
 # @drive-backup:
@@ -1671,6 +1677,11 @@
 #                   default 'report' (no limitations, since this applies to
 #                   a different block device than @device).
 #
+# @filter-node-name: #optional the node name that should be assigned to the
+#                    filter driver that the mirror job inserts into the graph
+#                    above @device. If this option is not given, a node name is
+#                    autogenerated. (Since: 2.9)
+#
 # Returns: nothing on success.
 #
 # Since: 2.6
@@ -1690,7 +1701,8 @@
             'sync': 'MirrorSyncMode',
             '*speed': 'int', '*granularity': 'uint32',
             '*buf-size': 'int', '*on-source-error': 'BlockdevOnError',
-            '*on-target-error': 'BlockdevOnError' } }
+            '*on-target-error': 'BlockdevOnError',
+            '*filter-node-name': 'str' } }
 
 ##
 # @block_set_io_throttle:
@@ -2111,6 +2123,7 @@
 # @replication: Since 2.8
 # @ssh: Since 2.8
 # @iscsi: Since 2.9
+# @rbd: Since 2.9
 #
 # Since: 2.0
 ##
@@ -2119,7 +2132,7 @@
             'dmg', 'file', 'ftp', 'ftps', 'gluster', 'host_cdrom',
             'host_device', 'http', 'https', 'iscsi', 'luks', 'nbd', 'nfs',
             'null-aio', 'null-co', 'parallels', 'qcow', 'qcow2', 'qed',
-            'quorum', 'raw', 'replication', 'ssh', 'vdi', 'vhdx', 'vmdk',
+            'quorum', 'raw', 'rbd', 'replication', 'ssh', 'vdi', 'vhdx', 'vmdk',
             'vpc', 'vvfat' ] }
 
 ##
@@ -2625,29 +2638,29 @@
 ##
 # @BlockdevOptionsIscsi:
 #
-# @transport        The iscsi transport type
+# @transport:       The iscsi transport type
 #
-# @portal           The address of the iscsi portal
+# @portal:          The address of the iscsi portal
 #
-# @target           The target iqn name
+# @target:          The target iqn name
 #
-# @lun              #optional LUN to connect to. Defaults to 0.
+# @lun:             #optional LUN to connect to. Defaults to 0.
 #
-# @user             #optional User name to log in with. If omitted, no CHAP
+# @user:            #optional User name to log in with. If omitted, no CHAP
 #                   authentication is performed.
 #
-# @password-secret  #optional The ID of a QCryptoSecret object providing
+# @password-secret: #optional The ID of a QCryptoSecret object providing
 #                   the password for the login. This option is required if
 #                   @user is specified.
 #
-# @initiator-name   #optional The iqn name we want to identify to the target
+# @initiator-name:  #optional The iqn name we want to identify to the target
 #                   as. If this option is not specified, an initiator name is
 #                   generated automatically.
 #
-# @header-digest    #optional The desired header digest. Defaults to
+# @header-digest:   #optional The desired header digest. Defaults to
 #                   none-crc32c.
 #
-# @timeout          #optional Timeout in seconds after which a request will
+# @timeout:         #optional Timeout in seconds after which a request will
 #                   timeout. 0 means no timeout and is the default.
 #
 # Driver specific block device options for iscsi
@@ -2665,6 +2678,63 @@
             '*header-digest': 'IscsiHeaderDigest',
             '*timeout': 'int' } }
 
+
+##
+# @RbdAuthSupport:
+#
+# An enumeration of RBD auth support
+#
+# Since: 2.9
+##
+{ 'enum': 'RbdAuthSupport',
+  'data': [ 'cephx', 'none' ] }
+
+
+##
+# @RbdAuthMethod:
+#
+# An enumeration of rados auth_supported types
+#
+# Since: 2.9
+##
+{ 'struct': 'RbdAuthMethod',
+  'data': { 'auth': 'RbdAuthSupport' } }
+
+##
+# @BlockdevOptionsRbd:
+#
+# @pool:               Ceph pool name.
+#
+# @image:              Image name in the Ceph pool.
+#
+# @conf:               #optional path to Ceph configuration file.  Values
+#                      in the configuration file will be overridden by
+#                      options specified via QAPI.
+#
+# @snapshot:           #optional Ceph snapshot name.
+#
+# @user:               #optional Ceph id name.
+#
+# @server:             #optional Monitor host address and port.  This maps
+#                      to the "mon_host" Ceph option.
+#
+# @auth-supported:     #optional Authentication supported.
+#
+# @password-secret:    #optional The ID of a QCryptoSecret object providing
+#                      the password for the login.
+#
+# Since: 2.9
+##
+{ 'struct': 'BlockdevOptionsRbd',
+  'data': { 'pool': 'str',
+            'image': 'str',
+            '*conf': 'str',
+            '*snapshot': 'str',
+            '*user': 'str',
+            '*server': ['InetSocketAddress'],
+            '*auth-supported': ['RbdAuthMethod'],
+            '*password-secret': 'str' } }
+
 ##
 # @ReplicationMode:
 #
@@ -2863,7 +2933,7 @@
       'qed':        'BlockdevOptionsGenericCOWFormat',
       'quorum':     'BlockdevOptionsQuorum',
       'raw':        'BlockdevOptionsRaw',
-# TODO rbd: Wait for structured options
+      'rbd':        'BlockdevOptionsRbd',
       'replication':'BlockdevOptionsReplication',
 # TODO sheepdog: Wait for structured options
       'ssh':        'BlockdevOptionsSsh',
diff --git a/qapi/event.json b/qapi/event.json
index 970ff0255a..e02852cd8a 100644
--- a/qapi/event.json
+++ b/qapi/event.json
@@ -488,9 +488,9 @@
 #
 # @action: action that has been taken, currently always "pause"
 #
-# @info: optional information about a panic
+# @info: #optional information about a panic (since 2.9)
 #
-# Since: 1.5 (@info since 2.9)
+# Since: 1.5
 #
 # Example:
 #
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index 1048bbc84e..026d25b767 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -273,6 +273,16 @@ opts_next_list(Visitor *v, GenericList *tail, size_t size)
 
 
 static void
+opts_check_list(Visitor *v, Error **errp)
+{
+    /*
+     * FIXME should set error when unvisited elements remain.  Mostly
+     * harmless, as the generated visits always visit all elements.
+     */
+}
+
+
+static void
 opts_end_list(Visitor *v, void **obj)
 {
     OptsVisitor *ov = to_ov(v);
@@ -481,23 +491,20 @@ opts_type_size(Visitor *v, const char *name, uint64_t *obj, Error **errp)
 {
     OptsVisitor *ov = to_ov(v);
     const QemuOpt *opt;
-    int64_t val;
-    char *endptr;
+    int err;
 
     opt = lookup_scalar(ov, name, errp);
     if (!opt) {
         return;
     }
 
-    val = qemu_strtosz_suffix(opt->str ? opt->str : "", &endptr,
-                         QEMU_STRTOSZ_DEFSUFFIX_B);
-    if (val < 0 || *endptr) {
+    err = qemu_strtosz(opt->str ? opt->str : "", NULL, obj);
+    if (err < 0) {
         error_setg(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
-                   "a size value representible as a non-negative int64");
+                   "a size value");
         return;
     }
 
-    *obj = val;
     processed(ov, name);
 }
 
@@ -531,6 +538,7 @@ opts_visitor_new(const QemuOpts *opts)
 {
     OptsVisitor *ov;
 
+    assert(opts);
     ov = g_malloc0(sizeof *ov);
 
     ov->visitor.type = VISITOR_INPUT;
@@ -541,6 +549,7 @@ opts_visitor_new(const QemuOpts *opts)
 
     ov->visitor.start_list = &opts_start_list;
     ov->visitor.next_list  = &opts_next_list;
+    ov->visitor.check_list = &opts_check_list;
     ov->visitor.end_list   = &opts_end_list;
 
     ov->visitor.type_int64  = &opts_type_int64;
diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index e6e93f02e6..43a09d147d 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -90,6 +90,14 @@ GenericList *visit_next_list(Visitor *v, GenericList *tail, size_t size)
     return v->next_list(v, tail, size);
 }
 
+void visit_check_list(Visitor *v, Error **errp)
+{
+    trace_visit_check_list(v);
+    if (v->check_list) {
+        v->check_list(v, errp);
+    }
+}
+
 void visit_end_list(Visitor *v, void **obj)
 {
     trace_visit_end_list(v, obj);
diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c
index 505eb418ac..dc502129d8 100644
--- a/qapi/qmp-dispatch.c
+++ b/qapi/qmp-dispatch.c
@@ -28,14 +28,12 @@ static QDict *qmp_dispatch_check_obj(const QObject *request, Error **errp)
     bool has_exec_key = false;
     QDict *dict = NULL;
 
-    if (qobject_type(request) != QTYPE_QDICT) {
-        error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT,
-                   "request is not a dictionary");
+    dict = qobject_to_qdict(request);
+    if (!dict) {
+        error_setg(errp, "Expected '%s' in QMP input", "object");
         return NULL;
     }
 
-    dict = qobject_to_qdict(request);
-
     for (ent = qdict_first(dict); ent;
          ent = qdict_next(dict, ent)) {
         arg_name = qdict_entry_key(ent);
@@ -43,26 +41,34 @@ static QDict *qmp_dispatch_check_obj(const QObject *request, Error **errp)
 
         if (!strcmp(arg_name, "execute")) {
             if (qobject_type(arg_obj) != QTYPE_QSTRING) {
-                error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT_MEMBER, "execute",
-                           "string");
+                error_setg(errp, "QMP input object member '%s' expects '%s'",
+                           "execute", "string");
                 return NULL;
             }
             has_exec_key = true;
-        } else if (strcmp(arg_name, "arguments")) {
-            error_setg(errp, QERR_QMP_EXTRA_MEMBER, arg_name);
+        } else if (!strcmp(arg_name, "arguments")) {
+            if (qobject_type(arg_obj) != QTYPE_QDICT) {
+                error_setg(errp, "QMP input object member '%s' expects '%s'",
+                           "arguments", "object");
+                return NULL;
+            }
+        } else {
+            error_setg(errp, "QMP input object member '%s' is unexpected",
+                       arg_name);
             return NULL;
         }
     }
 
     if (!has_exec_key) {
-        error_setg(errp, QERR_QMP_BAD_INPUT_OBJECT, "execute");
+        error_setg(errp, "Expected '%s' in QMP input", "execute");
         return NULL;
     }
 
     return dict;
 }
 
-static QObject *do_qmp_dispatch(QObject *request, Error **errp)
+static QObject *do_qmp_dispatch(QmpCommandList *cmds, QObject *request,
+                                Error **errp)
 {
     Error *local_err = NULL;
     const char *command;
@@ -76,7 +82,7 @@ static QObject *do_qmp_dispatch(QObject *request, Error **errp)
     }
 
     command = qdict_get_str(dict, "execute");
-    cmd = qmp_find_command(command);
+    cmd = qmp_find_command(cmds, command);
     if (cmd == NULL) {
         error_set(errp, ERROR_CLASS_COMMAND_NOT_FOUND,
                   "The command %s has not been found", command);
@@ -116,13 +122,13 @@ QObject *qmp_build_error_object(Error *err)
                               error_get_pretty(err));
 }
 
-QObject *qmp_dispatch(QObject *request)
+QObject *qmp_dispatch(QmpCommandList *cmds, QObject *request)
 {
     Error *err = NULL;
     QObject *ret;
     QDict *rsp;
 
-    ret = do_qmp_dispatch(request, &err);
+    ret = do_qmp_dispatch(cmds, request, &err);
 
     rsp = qdict_new();
     if (err) {
diff --git a/qapi/qmp-registry.c b/qapi/qmp-registry.c
index e8053686f3..5af484cd9a 100644
--- a/qapi/qmp-registry.c
+++ b/qapi/qmp-registry.c
@@ -15,11 +15,8 @@
 #include "qemu/osdep.h"
 #include "qapi/qmp/dispatch.h"
 
-static QTAILQ_HEAD(QmpCommandList, QmpCommand) qmp_commands =
-    QTAILQ_HEAD_INITIALIZER(qmp_commands);
-
-void qmp_register_command(const char *name, QmpCommandFunc *fn,
-                          QmpCommandOptions options)
+void qmp_register_command(QmpCommandList *cmds, const char *name,
+                          QmpCommandFunc *fn, QmpCommandOptions options)
 {
     QmpCommand *cmd = g_malloc0(sizeof(*cmd));
 
@@ -27,22 +24,22 @@ void qmp_register_command(const char *name, QmpCommandFunc *fn,
     cmd->fn = fn;
     cmd->enabled = true;
     cmd->options = options;
-    QTAILQ_INSERT_TAIL(&qmp_commands, cmd, node);
+    QTAILQ_INSERT_TAIL(cmds, cmd, node);
 }
 
-void qmp_unregister_command(const char *name)
+void qmp_unregister_command(QmpCommandList *cmds, const char *name)
 {
-    QmpCommand *cmd = qmp_find_command(name);
+    QmpCommand *cmd = qmp_find_command(cmds, name);
 
-    QTAILQ_REMOVE(&qmp_commands, cmd, node);
+    QTAILQ_REMOVE(cmds, cmd, node);
     g_free(cmd);
 }
 
-QmpCommand *qmp_find_command(const char *name)
+QmpCommand *qmp_find_command(QmpCommandList *cmds, const char *name)
 {
     QmpCommand *cmd;
 
-    QTAILQ_FOREACH(cmd, &qmp_commands, node) {
+    QTAILQ_FOREACH(cmd, cmds, node) {
         if (strcmp(cmd->name, name) == 0) {
             return cmd;
         }
@@ -50,11 +47,12 @@ QmpCommand *qmp_find_command(const char *name)
     return NULL;
 }
 
-static void qmp_toggle_command(const char *name, bool enabled)
+static void qmp_toggle_command(QmpCommandList *cmds, const char *name,
+                               bool enabled)
 {
     QmpCommand *cmd;
 
-    QTAILQ_FOREACH(cmd, &qmp_commands, node) {
+    QTAILQ_FOREACH(cmd, cmds, node) {
         if (strcmp(cmd->name, name) == 0) {
             cmd->enabled = enabled;
             return;
@@ -62,14 +60,14 @@ static void qmp_toggle_command(const char *name, bool enabled)
     }
 }
 
-void qmp_disable_command(const char *name)
+void qmp_disable_command(QmpCommandList *cmds, const char *name)
 {
-    qmp_toggle_command(name, false);
+    qmp_toggle_command(cmds, name, false);
 }
 
-void qmp_enable_command(const char *name)
+void qmp_enable_command(QmpCommandList *cmds, const char *name)
 {
-    qmp_toggle_command(name, true);
+    qmp_toggle_command(cmds, name, true);
 }
 
 bool qmp_command_is_enabled(const QmpCommand *cmd)
@@ -87,11 +85,12 @@ bool qmp_has_success_response(const QmpCommand *cmd)
     return !(cmd->options & QCO_NO_SUCCESS_RESP);
 }
 
-void qmp_for_each_command(qmp_cmd_callback_fn fn, void *opaque)
+void qmp_for_each_command(QmpCommandList *cmds, qmp_cmd_callback_fn fn,
+                          void *opaque)
 {
     QmpCommand *cmd;
 
-    QTAILQ_FOREACH(cmd, &qmp_commands, node) {
+    QTAILQ_FOREACH(cmd, cmds, node) {
         fn(cmd, opaque);
     }
 }
diff --git a/qapi/qobject-input-visitor.c b/qapi/qobject-input-visitor.c
index 0063327b3b..d192727e0b 100644
--- a/qapi/qobject-input-visitor.c
+++ b/qapi/qobject-input-visitor.c
@@ -21,21 +21,19 @@
 #include "qapi/qmp/types.h"
 #include "qapi/qmp/qerror.h"
 
-#define QIV_STACK_SIZE 1024
-
-typedef struct StackObject
-{
-    QObject *obj; /* Object being visited */
+typedef struct StackObject {
+    const char *name;            /* Name of @obj in its parent, if any */
+    QObject *obj;                /* QDict or QList being visited */
     void *qapi; /* sanity check that caller uses same pointer */
 
-    GHashTable *h;           /* If obj is dict: unvisited keys */
-    const QListEntry *entry; /* If obj is list: unvisited tail */
+    GHashTable *h;              /* If @obj is QDict: unvisited keys */
+    const QListEntry *entry;    /* If @obj is QList: unvisited tail */
+    unsigned index;             /* If @obj is QList: list index of @entry */
 
-    QSLIST_ENTRY(StackObject) node;
+    QSLIST_ENTRY(StackObject) node; /* parent */
 } StackObject;
 
-struct QObjectInputVisitor
-{
+struct QObjectInputVisitor {
     Visitor visitor;
 
     /* Root of visit at visitor creation. */
@@ -45,8 +43,7 @@ struct QObjectInputVisitor
      * QDict or QList). */
     QSLIST_HEAD(, StackObject) stack;
 
-    /* True to reject parse in visit_end_struct() if unvisited keys remain. */
-    bool strict;
+    GString *errname;           /* Accumulator for full_name() */
 };
 
 static QObjectInputVisitor *to_qiv(Visitor *v)
@@ -54,9 +51,51 @@ static QObjectInputVisitor *to_qiv(Visitor *v)
     return container_of(v, QObjectInputVisitor, visitor);
 }
 
-static QObject *qobject_input_get_object(QObjectInputVisitor *qiv,
-                                         const char *name,
-                                         bool consume, Error **errp)
+static const char *full_name_nth(QObjectInputVisitor *qiv, const char *name,
+                                 int n)
+{
+    StackObject *so;
+    char buf[32];
+
+    if (qiv->errname) {
+        g_string_truncate(qiv->errname, 0);
+    } else {
+        qiv->errname = g_string_new("");
+    }
+
+    QSLIST_FOREACH(so , &qiv->stack, node) {
+        if (n) {
+            n--;
+        } else if (qobject_type(so->obj) == QTYPE_QDICT) {
+            g_string_prepend(qiv->errname, name ?: "<anonymous>");
+            g_string_prepend_c(qiv->errname, '.');
+        } else {
+            snprintf(buf, sizeof(buf), "[%u]", so->index);
+            g_string_prepend(qiv->errname, buf);
+        }
+        name = so->name;
+    }
+    assert(!n);
+
+    if (name) {
+        g_string_prepend(qiv->errname, name);
+    } else if (qiv->errname->str[0] == '.') {
+        g_string_erase(qiv->errname, 0, 1);
+    } else if (!qiv->errname->str[0]) {
+        return "<anonymous>";
+    }
+
+    return qiv->errname->str;
+}
+
+static const char *full_name(QObjectInputVisitor *qiv, const char *name)
+{
+    return full_name_nth(qiv, name, 0);
+}
+
+static QObject *qobject_input_try_get_object(QObjectInputVisitor *qiv,
+                                             const char *name,
+                                             bool consume)
 {
     StackObject *tos;
     QObject *qobj;
@@ -80,22 +119,37 @@ static QObject *qobject_input_get_object(QObjectInputVisitor *qiv,
             bool removed = g_hash_table_remove(tos->h, name);
             assert(removed);
         }
-        if (!ret) {
-            error_setg(errp, QERR_MISSING_PARAMETER, name);
-        }
     } else {
         assert(qobject_type(qobj) == QTYPE_QLIST);
         assert(!name);
-        ret = qlist_entry_obj(tos->entry);
-        assert(ret);
+        if (tos->entry) {
+            ret = qlist_entry_obj(tos->entry);
+            if (consume) {
+                tos->entry = qlist_next(tos->entry);
+            }
+        } else {
+            ret = NULL;
+        }
         if (consume) {
-            tos->entry = qlist_next(tos->entry);
+            tos->index++;
         }
     }
 
     return ret;
 }
 
+static QObject *qobject_input_get_object(QObjectInputVisitor *qiv,
+                                         const char *name,
+                                         bool consume, Error **errp)
+{
+    QObject *obj = qobject_input_try_get_object(qiv, name, consume);
+
+    if (!obj) {
+        error_setg(errp, QERR_MISSING_PARAMETER, full_name(qiv, name));
+    }
+    return obj;
+}
+
 static void qdict_add_key(const char *key, QObject *obj, void *opaque)
 {
     GHashTable *h = opaque;
@@ -103,22 +157,25 @@ static void qdict_add_key(const char *key, QObject *obj, void *opaque)
 }
 
 static const QListEntry *qobject_input_push(QObjectInputVisitor *qiv,
-                                            QObject *obj, void *qapi,
-                                            Error **errp)
+                                            const char *name,
+                                            QObject *obj, void *qapi)
 {
     GHashTable *h;
     StackObject *tos = g_new0(StackObject, 1);
 
     assert(obj);
+    tos->name = name;
     tos->obj = obj;
     tos->qapi = qapi;
 
-    if (qiv->strict && qobject_type(obj) == QTYPE_QDICT) {
+    if (qobject_type(obj) == QTYPE_QDICT) {
         h = g_hash_table_new(g_str_hash, g_str_equal);
         qdict_iter(qobject_to_qdict(obj), qdict_add_key, h);
         tos->h = h;
-    } else if (qobject_type(obj) == QTYPE_QLIST) {
+    } else {
+        assert(qobject_type(obj) == QTYPE_QLIST);
         tos->entry = qlist_first(qobject_to_qlist(obj));
+        tos->index = -1;
     }
 
     QSLIST_INSERT_HEAD(&qiv->stack, tos, node);
@@ -130,19 +187,15 @@ static void qobject_input_check_struct(Visitor *v, Error **errp)
 {
     QObjectInputVisitor *qiv = to_qiv(v);
     StackObject *tos = QSLIST_FIRST(&qiv->stack);
+    GHashTableIter iter;
+    const char *key;
 
     assert(tos && !tos->entry);
-    if (qiv->strict) {
-        GHashTable *const top_ht = tos->h;
-        if (top_ht) {
-            GHashTableIter iter;
-            const char *key;
-
-            g_hash_table_iter_init(&iter, top_ht);
-            if (g_hash_table_iter_next(&iter, (void **)&key, NULL)) {
-                error_setg(errp, QERR_QMP_EXTRA_MEMBER, key);
-            }
-        }
+
+    g_hash_table_iter_init(&iter, tos->h);
+    if (g_hash_table_iter_next(&iter, (void **)&key, NULL)) {
+        error_setg(errp, "Parameter '%s' is unexpected",
+                   full_name(qiv, key));
     }
 }
 
@@ -170,7 +223,6 @@ static void qobject_input_start_struct(Visitor *v, const char *name, void **obj,
 {
     QObjectInputVisitor *qiv = to_qiv(v);
     QObject *qobj = qobject_input_get_object(qiv, name, true, errp);
-    Error *err = NULL;
 
     if (obj) {
         *obj = NULL;
@@ -179,16 +231,12 @@ static void qobject_input_start_struct(Visitor *v, const char *name, void **obj,
         return;
     }
     if (qobject_type(qobj) != QTYPE_QDICT) {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "QDict");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+                   full_name(qiv, name), "object");
         return;
     }
 
-    qobject_input_push(qiv, qobj, obj, &err);
-    if (err) {
-        error_propagate(errp, err);
-        return;
-    }
+    qobject_input_push(qiv, name, qobj, obj);
 
     if (obj) {
         *obj = g_malloc0(size);
@@ -204,25 +252,21 @@ static void qobject_input_start_list(Visitor *v, const char *name,
     QObject *qobj = qobject_input_get_object(qiv, name, true, errp);
     const QListEntry *entry;
 
+    if (list) {
+        *list = NULL;
+    }
     if (!qobj) {
         return;
     }
     if (qobject_type(qobj) != QTYPE_QLIST) {
-        if (list) {
-            *list = NULL;
-        }
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "list");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+                   full_name(qiv, name), "array");
         return;
     }
 
-    entry = qobject_input_push(qiv, qobj, list, errp);
-    if (list) {
-        if (entry) {
-            *list = g_malloc0(size);
-        } else {
-            *list = NULL;
-        }
+    entry = qobject_input_push(qiv, name, qobj, list);
+    if (entry && list) {
+        *list = g_malloc0(size);
     }
 }
 
@@ -230,15 +274,30 @@ static GenericList *qobject_input_next_list(Visitor *v, GenericList *tail,
                                             size_t size)
 {
     QObjectInputVisitor *qiv = to_qiv(v);
-    StackObject *so = QSLIST_FIRST(&qiv->stack);
+    StackObject *tos = QSLIST_FIRST(&qiv->stack);
+
+    assert(tos && tos->obj && qobject_type(tos->obj) == QTYPE_QLIST);
 
-    if (!so->entry) {
+    if (!tos->entry) {
         return NULL;
     }
     tail->next = g_malloc0(size);
     return tail->next;
 }
 
+static void qobject_input_check_list(Visitor *v, Error **errp)
+{
+    QObjectInputVisitor *qiv = to_qiv(v);
+    StackObject *tos = QSLIST_FIRST(&qiv->stack);
+
+    assert(tos && tos->obj && qobject_type(tos->obj) == QTYPE_QLIST);
+
+    if (tos->entry) {
+        error_setg(errp, "Only %u list elements expected in %s",
+                   tos->index + 1, full_name_nth(qiv, NULL, 1));
+    }
+}
+
 
 static void qobject_input_start_alternate(Visitor *v, const char *name,
                                           GenericAlternate **obj, size_t size,
@@ -270,8 +329,8 @@ static void qobject_input_type_int64(Visitor *v, const char *name, int64_t *obj,
     }
     qint = qobject_to_qint(qobj);
     if (!qint) {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "integer");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+                   full_name(qiv, name), "integer");
         return;
     }
 
@@ -291,8 +350,8 @@ static void qobject_input_type_uint64(Visitor *v, const char *name,
     }
     qint = qobject_to_qint(qobj);
     if (!qint) {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "integer");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+                   full_name(qiv, name), "integer");
         return;
     }
 
@@ -311,8 +370,8 @@ static void qobject_input_type_bool(Visitor *v, const char *name, bool *obj,
     }
     qbool = qobject_to_qbool(qobj);
     if (!qbool) {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "boolean");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+                   full_name(qiv, name), "boolean");
         return;
     }
 
@@ -332,8 +391,8 @@ static void qobject_input_type_str(Visitor *v, const char *name, char **obj,
     }
     qstr = qobject_to_qstring(qobj);
     if (!qstr) {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "string");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+                   full_name(qiv, name), "string");
         return;
     }
 
@@ -363,8 +422,8 @@ static void qobject_input_type_number(Visitor *v, const char *name, double *obj,
         return;
     }
 
-    error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-               "number");
+    error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+               full_name(qiv, name), "number");
 }
 
 static void qobject_input_type_any(Visitor *v, const char *name, QObject **obj,
@@ -392,15 +451,15 @@ static void qobject_input_type_null(Visitor *v, const char *name, Error **errp)
     }
 
     if (qobject_type(qobj) != QTYPE_QNULL) {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "null");
+        error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
+                   full_name(qiv, name), "null");
     }
 }
 
 static void qobject_input_optional(Visitor *v, const char *name, bool *present)
 {
     QObjectInputVisitor *qiv = to_qiv(v);
-    QObject *qobj = qobject_input_get_object(qiv, name, false, NULL);
+    QObject *qobj = qobject_input_try_get_object(qiv, name, false);
 
     if (!qobj) {
         *present = false;
@@ -413,6 +472,7 @@ static void qobject_input_optional(Visitor *v, const char *name, bool *present)
 static void qobject_input_free(Visitor *v)
 {
     QObjectInputVisitor *qiv = to_qiv(v);
+
     while (!QSLIST_EMPTY(&qiv->stack)) {
         StackObject *tos = QSLIST_FIRST(&qiv->stack);
 
@@ -421,10 +481,13 @@ static void qobject_input_free(Visitor *v)
     }
 
     qobject_decref(qiv->root);
+    if (qiv->errname) {
+        g_string_free(qiv->errname, TRUE);
+    }
     g_free(qiv);
 }
 
-Visitor *qobject_input_visitor_new(QObject *obj, bool strict)
+Visitor *qobject_input_visitor_new(QObject *obj)
 {
     QObjectInputVisitor *v;
 
@@ -437,6 +500,7 @@ Visitor *qobject_input_visitor_new(QObject *obj, bool strict)
     v->visitor.end_struct = qobject_input_pop;
     v->visitor.start_list = qobject_input_start_list;
     v->visitor.next_list = qobject_input_next_list;
+    v->visitor.check_list = qobject_input_check_list;
     v->visitor.end_list = qobject_input_pop;
     v->visitor.start_alternate = qobject_input_start_alternate;
     v->visitor.type_int64 = qobject_input_type_int64;
@@ -448,7 +512,6 @@ Visitor *qobject_input_visitor_new(QObject *obj, bool strict)
     v->visitor.type_null = qobject_input_type_null;
     v->visitor.optional = qobject_input_optional;
     v->visitor.free = qobject_input_free;
-    v->strict = strict;
 
     v->root = obj;
     qobject_incref(obj);
diff --git a/qapi/string-input-visitor.c b/qapi/string-input-visitor.c
index 8dfa561252..806b01ae3a 100644
--- a/qapi/string-input-visitor.c
+++ b/qapi/string-input-visitor.c
@@ -170,6 +170,35 @@ static GenericList *next_list(Visitor *v, GenericList *tail, size_t size)
     return tail->next;
 }
 
+static void check_list(Visitor *v, Error **errp)
+{
+    const StringInputVisitor *siv = to_siv(v);
+    Range *r;
+    GList *cur_range;
+
+    if (!siv->ranges || !siv->cur_range) {
+        return;
+    }
+
+    r = siv->cur_range->data;
+    if (!r) {
+        return;
+    }
+
+    if (!range_contains(r, siv->cur)) {
+        cur_range = g_list_next(siv->cur_range);
+        if (!cur_range) {
+            return;
+        }
+        r = cur_range->data;
+        if (!r) {
+            return;
+        }
+    }
+
+    error_setg(errp, "Range contains too many values");
+}
+
 static void end_list(Visitor *v, void **obj)
 {
     StringInputVisitor *siv = to_siv(v);
@@ -182,12 +211,6 @@ static void parse_type_int64(Visitor *v, const char *name, int64_t *obj,
 {
     StringInputVisitor *siv = to_siv(v);
 
-    if (!siv->string) {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "integer");
-        return;
-    }
-
     if (parse_str(siv, name, errp) < 0) {
         return;
     }
@@ -242,13 +265,7 @@ static void parse_type_size(Visitor *v, const char *name, uint64_t *obj,
     Error *err = NULL;
     uint64_t val;
 
-    if (siv->string) {
-        parse_option_size(name, siv->string, &val, &err);
-    } else {
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "size");
-        return;
-    }
+    parse_option_size(name, siv->string, &val, &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -262,19 +279,17 @@ static void parse_type_bool(Visitor *v, const char *name, bool *obj,
 {
     StringInputVisitor *siv = to_siv(v);
 
-    if (siv->string) {
-        if (!strcasecmp(siv->string, "on") ||
-            !strcasecmp(siv->string, "yes") ||
-            !strcasecmp(siv->string, "true")) {
-            *obj = true;
-            return;
-        }
-        if (!strcasecmp(siv->string, "off") ||
-            !strcasecmp(siv->string, "no") ||
-            !strcasecmp(siv->string, "false")) {
-            *obj = false;
-            return;
-        }
+    if (!strcasecmp(siv->string, "on") ||
+        !strcasecmp(siv->string, "yes") ||
+        !strcasecmp(siv->string, "true")) {
+        *obj = true;
+        return;
+    }
+    if (!strcasecmp(siv->string, "off") ||
+        !strcasecmp(siv->string, "no") ||
+        !strcasecmp(siv->string, "false")) {
+        *obj = false;
+        return;
     }
 
     error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
@@ -285,13 +300,8 @@ static void parse_type_str(Visitor *v, const char *name, char **obj,
                            Error **errp)
 {
     StringInputVisitor *siv = to_siv(v);
-    if (siv->string) {
-        *obj = g_strdup(siv->string);
-    } else {
-        *obj = NULL;
-        error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
-                   "string");
-    }
+
+    *obj = g_strdup(siv->string);
 }
 
 static void parse_type_number(Visitor *v, const char *name, double *obj,
@@ -302,10 +312,8 @@ static void parse_type_number(Visitor *v, const char *name, double *obj,
     double val;
 
     errno = 0;
-    if (siv->string) {
-        val = strtod(siv->string, &endp);
-    }
-    if (!siv->string || errno || endp == siv->string || *endp) {
+    val = strtod(siv->string, &endp);
+    if (errno || endp == siv->string || *endp) {
         error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
                    "number");
         return;
@@ -314,18 +322,6 @@ static void parse_type_number(Visitor *v, const char *name, double *obj,
     *obj = val;
 }
 
-static void parse_optional(Visitor *v, const char *name, bool *present)
-{
-    StringInputVisitor *siv = to_siv(v);
-
-    if (!siv->string) {
-        *present = false;
-        return;
-    }
-
-    *present = true;
-}
-
 static void string_input_free(Visitor *v)
 {
     StringInputVisitor *siv = to_siv(v);
@@ -339,6 +335,7 @@ Visitor *string_input_visitor_new(const char *str)
 {
     StringInputVisitor *v;
 
+    assert(str);
     v = g_malloc0(sizeof(*v));
 
     v->visitor.type = VISITOR_INPUT;
@@ -350,8 +347,8 @@ Visitor *string_input_visitor_new(const char *str)
     v->visitor.type_number = parse_type_number;
     v->visitor.start_list = start_list;
     v->visitor.next_list = next_list;
+    v->visitor.check_list = check_list;
     v->visitor.end_list = end_list;
-    v->visitor.optional = parse_optional;
     v->visitor.free = string_input_free;
 
     v->string = str;
diff --git a/qapi/trace-events b/qapi/trace-events
index 9cbb61b2bd..339cacf0ad 100644
--- a/qapi/trace-events
+++ b/qapi/trace-events
@@ -8,6 +8,7 @@ visit_end_struct(void *v, void *obj) "v=%p obj=%p"
 
 visit_start_list(void *v, const char *name, void *obj, size_t size) "v=%p name=%s obj=%p size=%zu"
 visit_next_list(void *v, void *tail, size_t size) "v=%p tail=%p size=%zu"
+visit_check_list(void *v) "v=%p"
 visit_end_list(void *v, void *obj) "v=%p obj=%p"
 
 visit_start_alternate(void *v, const char *name, void *obj, size_t size, bool promote_int) "v=%p name=%s obj=%p size=%zu promote_int=%d"