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[Qemu-devel] [PULL 13/28] qom: add helpers for UserCreatable object type
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 13/28] qom: add helpers for UserCreatable object types |
Date: |
Tue, 16 Feb 2016 17:34:31 +0100 |
From: "Daniel P. Berrange" <address@hidden>
The QMP monitor code has two helper methods object_add
and qmp_object_del that are called from several places
in the code (QMP, HMP and main emulator startup).
The HMP and main emulator startup code also share
further logic that extracts the qom-type & id
values from a qdict.
We soon need to use this logic from qemu-img, qemu-io
and qemu-nbd too, but don't want those to depend on
the monitor, nor do we want to duplicate the code.
To avoid this, move some code out of qmp.c and hmp.c
adding new methods to qom/object_interfaces.c
- user_creatable_add - takes a QDict holding a full
object definition & instantiates it
- user_creatable_add_type - takes an ID, type name,
and QDict holding object properties & instantiates
it
- user_creatable_add_opts - takes a QemuOpts holding
a full object definition & instantiates it
- user_creatable_add_opts_foreach - variant on
user_creatable_add_opts which can be directly used
in conjunction with qemu_opts_foreach.
- user_creatable_del - takes an ID and deletes the
corresponding object
The existing code is updated to use these new methods.
Signed-off-by: Daniel P. Berrange <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
hmp.c | 52 +++---------
include/monitor/monitor.h | 3 -
include/qom/object_interfaces.h | 92 +++++++++++++++++++++
qmp.c | 76 ++----------------
qom/object_interfaces.c | 174 ++++++++++++++++++++++++++++++++++++++++
vl.c | 68 ++--------------
6 files changed, 290 insertions(+), 175 deletions(-)
diff --git a/hmp.c b/hmp.c
index c6419da..41fb9ca 100644
--- a/hmp.c
+++ b/hmp.c
@@ -30,6 +30,7 @@
#include "qapi/string-output-visitor.h"
#include "qapi/util.h"
#include "qapi-visit.h"
+#include "qom/object_interfaces.h"
#include "ui/console.h"
#include "block/qapi.h"
#include "qemu-io.h"
@@ -1655,58 +1656,27 @@ void hmp_netdev_del(Monitor *mon, const QDict *qdict)
void hmp_object_add(Monitor *mon, const QDict *qdict)
{
Error *err = NULL;
- Error *err_end = NULL;
QemuOpts *opts;
- char *type = NULL;
- char *id = NULL;
OptsVisitor *ov;
- QDict *pdict;
- Visitor *v;
+ Object *obj = NULL;
opts = qemu_opts_from_qdict(qemu_find_opts("object"), qdict, &err);
if (err) {
- goto out;
+ hmp_handle_error(mon, &err);
+ return;
}
ov = opts_visitor_new(opts);
- pdict = qdict_clone_shallow(qdict);
- v = opts_get_visitor(ov);
-
- visit_start_struct(v, NULL, NULL, 0, &err);
- if (err) {
- goto out_clean;
- }
-
- qdict_del(pdict, "qom-type");
- visit_type_str(v, "qom-type", &type, &err);
- if (err) {
- goto out_end;
- }
+ obj = user_creatable_add(qdict, opts_get_visitor(ov), &err);
+ opts_visitor_cleanup(ov);
+ qemu_opts_del(opts);
- qdict_del(pdict, "id");
- visit_type_str(v, "id", &id, &err);
if (err) {
- goto out_end;
+ hmp_handle_error(mon, &err);
}
-
- object_add(type, id, pdict, v, &err);
-
-out_end:
- visit_end_struct(v, &err_end);
- if (!err && err_end) {
- qmp_object_del(id, NULL);
+ if (obj) {
+ object_unref(obj);
}
- error_propagate(&err, err_end);
-out_clean:
- opts_visitor_cleanup(ov);
-
- QDECREF(pdict);
- qemu_opts_del(opts);
- g_free(id);
- g_free(type);
-
-out:
- hmp_handle_error(mon, &err);
}
void hmp_getfd(Monitor *mon, const QDict *qdict)
@@ -1934,7 +1904,7 @@ void hmp_object_del(Monitor *mon, const QDict *qdict)
const char *id = qdict_get_str(qdict, "id");
Error *err = NULL;
- qmp_object_del(id, &err);
+ user_creatable_del(id, &err);
hmp_handle_error(mon, &err);
}
diff --git a/include/monitor/monitor.h b/include/monitor/monitor.h
index 91b95ae..aa0f373 100644
--- a/include/monitor/monitor.h
+++ b/include/monitor/monitor.h
@@ -43,9 +43,6 @@ void monitor_read_command(Monitor *mon, int show_prompt);
int monitor_read_password(Monitor *mon, ReadLineFunc *readline_func,
void *opaque);
-void object_add(const char *type, const char *id, const QDict *qdict,
- Visitor *v, Error **errp);
-
AddfdInfo *monitor_fdset_add_fd(int fd, bool has_fdset_id, int64_t fdset_id,
bool has_opaque, const char *opaque,
Error **errp);
diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h
index 283ae0d..d579746 100644
--- a/include/qom/object_interfaces.h
+++ b/include/qom/object_interfaces.h
@@ -2,6 +2,8 @@
#define OBJECT_INTERFACES_H
#include "qom/object.h"
+#include "qapi/qmp/qdict.h"
+#include "qapi/visitor.h"
#define TYPE_USER_CREATABLE "user-creatable"
@@ -72,4 +74,94 @@ void user_creatable_complete(Object *obj, Error **errp);
* from implements USER_CREATABLE interface.
*/
bool user_creatable_can_be_deleted(UserCreatable *uc, Error **errp);
+
+/**
+ * user_creatable_add:
+ * @qdict: the object definition
+ * @v: the visitor
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Create an instance of the user creatable object whose type
+ * is defined in @qdict by the 'qom-type' field, placing it
+ * in the object composition tree with name provided by the
+ * 'id' field. The remaining fields in @qdict are used to
+ * initialize the object properties.
+ *
+ * Returns: the newly created object or NULL on error
+ */
+Object *user_creatable_add(const QDict *qdict,
+ Visitor *v, Error **errp);
+
+/**
+ * user_creatable_add_type:
+ * @type: the object type name
+ * @id: the unique ID for the object
+ * @qdict: the object properties
+ * @v: the visitor
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Create an instance of the user creatable object @type, placing
+ * it in the object composition tree with name @id, initializing
+ * it with properties from @qdict
+ *
+ * Returns: the newly created object or NULL on error
+ */
+Object *user_creatable_add_type(const char *type, const char *id,
+ const QDict *qdict,
+ Visitor *v, Error **errp);
+
+/**
+ * user_creatable_add_opts:
+ * @opts: the object definition
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Create an instance of the user creatable object whose type
+ * is defined in @opts by the 'qom-type' option, placing it
+ * in the object composition tree with name provided by the
+ * 'id' field. The remaining options in @opts are used to
+ * initialize the object properties.
+ *
+ * Returns: the newly created object or NULL on error
+ */
+Object *user_creatable_add_opts(QemuOpts *opts, Error **errp);
+
+
+/**
+ * user_creatable_add_opts_predicate:
+ * @type: the QOM type to be added
+ *
+ * A callback function to determine whether an object
+ * of type @type should be created. Instances of this
+ * callback should be passed to user_creatable_add_opts_foreach
+ */
+typedef bool (*user_creatable_add_opts_predicate)(const char *type);
+
+/**
+ * user_creatable_add_opts_foreach:
+ * @opaque: a user_creatable_add_opts_predicate callback or NULL
+ * @opts: options to create
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * An iterator callback to be used in conjunction with
+ * the qemu_opts_foreach() method for creating a list of
+ * objects from a set of QemuOpts
+ *
+ * The @opaque parameter can be passed a user_creatable_add_opts_predicate
+ * callback to filter which types of object are created during iteration.
+ *
+ * Returns: 0 on success, -1 on error
+ */
+int user_creatable_add_opts_foreach(void *opaque,
+ QemuOpts *opts, Error **errp);
+
+/**
+ * user_creatable_del:
+ * @id: the unique ID for the object
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Delete an instance of the user creatable object identified
+ * by @id.
+ */
+void user_creatable_del(const char *id, Error **errp);
+
#endif
diff --git a/qmp.c b/qmp.c
index 6ae7230..9a93d5e 100644
--- a/qmp.c
+++ b/qmp.c
@@ -633,65 +633,13 @@ void qmp_add_client(const char *protocol, const char
*fdname,
close(fd);
}
-void object_add(const char *type, const char *id, const QDict *qdict,
- Visitor *v, Error **errp)
-{
- Object *obj;
- ObjectClass *klass;
- const QDictEntry *e;
- Error *local_err = NULL;
-
- klass = object_class_by_name(type);
- if (!klass) {
- error_setg(errp, "invalid object type: %s", type);
- return;
- }
-
- if (!object_class_dynamic_cast(klass, TYPE_USER_CREATABLE)) {
- error_setg(errp, "object type '%s' isn't supported by object-add",
- type);
- return;
- }
-
- if (object_class_is_abstract(klass)) {
- error_setg(errp, "object type '%s' is abstract", type);
- return;
- }
-
- obj = object_new(type);
- if (qdict) {
- for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
- object_property_set(obj, v, e->key, &local_err);
- if (local_err) {
- goto out;
- }
- }
- }
-
- object_property_add_child(object_get_objects_root(),
- id, obj, &local_err);
- if (local_err) {
- goto out;
- }
-
- user_creatable_complete(obj, &local_err);
- if (local_err) {
- object_property_del(object_get_objects_root(),
- id, &error_abort);
- goto out;
- }
-out:
- if (local_err) {
- error_propagate(errp, local_err);
- }
- object_unref(obj);
-}
void qmp_object_add(const char *type, const char *id,
bool has_props, QObject *props, Error **errp)
{
const QDict *pdict = NULL;
QmpInputVisitor *qiv;
+ Object *obj;
if (props) {
pdict = qobject_to_qdict(props);
@@ -702,27 +650,17 @@ void qmp_object_add(const char *type, const char *id,
}
qiv = qmp_input_visitor_new(props);
- object_add(type, id, pdict, qmp_input_get_visitor(qiv), errp);
+ obj = user_creatable_add_type(type, id, pdict,
+ qmp_input_get_visitor(qiv), errp);
qmp_input_visitor_cleanup(qiv);
+ if (obj) {
+ object_unref(obj);
+ }
}
void qmp_object_del(const char *id, Error **errp)
{
- Object *container;
- Object *obj;
-
- container = object_get_objects_root();
- obj = object_resolve_path_component(container, id);
- if (!obj) {
- error_setg(errp, "object id not found");
- return;
- }
-
- if (!user_creatable_can_be_deleted(USER_CREATABLE(obj), errp)) {
- error_setg(errp, "%s is in use, can not be deleted", id);
- return;
- }
- object_unparent(obj);
+ user_creatable_del(id, errp);
}
MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index f1218f0..c2f6e29 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -1,6 +1,9 @@
#include "qemu/osdep.h"
#include "qom/object_interfaces.h"
#include "qemu/module.h"
+#include "qapi-visit.h"
+#include "qapi/qmp-output-visitor.h"
+#include "qapi/opts-visitor.h"
void user_creatable_complete(Object *obj, Error **errp)
{
@@ -31,6 +34,177 @@ bool user_creatable_can_be_deleted(UserCreatable *uc, Error
**errp)
}
}
+
+Object *user_creatable_add(const QDict *qdict,
+ Visitor *v, Error **errp)
+{
+ char *type = NULL;
+ char *id = NULL;
+ Object *obj = NULL;
+ Error *local_err = NULL, *end_err = NULL;
+ QDict *pdict;
+
+ pdict = qdict_clone_shallow(qdict);
+
+ visit_start_struct(v, NULL, NULL, 0, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ qdict_del(pdict, "qom-type");
+ visit_type_str(v, "qom-type", &type, &local_err);
+ if (local_err) {
+ goto out_visit;
+ }
+
+ qdict_del(pdict, "id");
+ visit_type_str(v, "id", &id, &local_err);
+ if (local_err) {
+ goto out_visit;
+ }
+
+ obj = user_creatable_add_type(type, id, pdict, v, &local_err);
+ if (local_err) {
+ goto out_visit;
+ }
+
+ out_visit:
+ visit_end_struct(v, &end_err);
+ if (end_err) {
+ error_propagate(&local_err, end_err);
+ if (obj) {
+ user_creatable_del(id, NULL);
+ }
+ goto out;
+ }
+
+out:
+ QDECREF(pdict);
+ g_free(id);
+ g_free(type);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ object_unref(obj);
+ return NULL;
+ }
+ return obj;
+}
+
+
+Object *user_creatable_add_type(const char *type, const char *id,
+ const QDict *qdict,
+ Visitor *v, Error **errp)
+{
+ Object *obj;
+ ObjectClass *klass;
+ const QDictEntry *e;
+ Error *local_err = NULL;
+
+ klass = object_class_by_name(type);
+ if (!klass) {
+ error_setg(errp, "invalid object type: %s", type);
+ return NULL;
+ }
+
+ if (!object_class_dynamic_cast(klass, TYPE_USER_CREATABLE)) {
+ error_setg(errp, "object type '%s' isn't supported by object-add",
+ type);
+ return NULL;
+ }
+
+ if (object_class_is_abstract(klass)) {
+ error_setg(errp, "object type '%s' is abstract", type);
+ return NULL;
+ }
+
+ obj = object_new(type);
+ if (qdict) {
+ for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
+ object_property_set(obj, v, e->key, &local_err);
+ if (local_err) {
+ goto out;
+ }
+ }
+ }
+
+ object_property_add_child(object_get_objects_root(),
+ id, obj, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ user_creatable_complete(obj, &local_err);
+ if (local_err) {
+ object_property_del(object_get_objects_root(),
+ id, &error_abort);
+ goto out;
+ }
+out:
+ if (local_err) {
+ error_propagate(errp, local_err);
+ object_unref(obj);
+ return NULL;
+ }
+ return obj;
+}
+
+
+Object *user_creatable_add_opts(QemuOpts *opts, Error **errp)
+{
+ OptsVisitor *ov;
+ QDict *pdict;
+ Object *obj = NULL;
+
+ ov = opts_visitor_new(opts);
+ pdict = qemu_opts_to_qdict(opts, NULL);
+
+ obj = user_creatable_add(pdict, opts_get_visitor(ov), errp);
+ opts_visitor_cleanup(ov);
+ QDECREF(pdict);
+ return obj;
+}
+
+
+int user_creatable_add_opts_foreach(void *opaque, QemuOpts *opts, Error **errp)
+{
+ bool (*type_predicate)(const char *) = opaque;
+ Object *obj = NULL;
+ const char *type;
+
+ type = qemu_opt_get(opts, "qom-type");
+ if (type && type_predicate &&
+ !type_predicate(type)) {
+ return 0;
+ }
+
+ obj = user_creatable_add_opts(opts, errp);
+ if (!obj) {
+ return -1;
+ }
+ object_unref(obj);
+ return 0;
+}
+
+
+void user_creatable_del(const char *id, Error **errp)
+{
+ Object *container;
+ Object *obj;
+
+ container = object_get_objects_root();
+ obj = object_resolve_path_component(container, id);
+ if (!obj) {
+ error_setg(errp, "object '%s' not found", id);
+ return;
+ }
+
+ if (!user_creatable_can_be_deleted(USER_CREATABLE(obj), errp)) {
+ error_setg(errp, "object '%s' is in use, can not be deleted", id);
+ return;
+ }
+ object_unparent(obj);
+}
+
static void register_types(void)
{
static const TypeInfo uc_interface_info = {
diff --git a/vl.c b/vl.c
index 2e0116e..18e6086 100644
--- a/vl.c
+++ b/vl.c
@@ -2830,64 +2830,6 @@ static bool object_create_delayed(const char *type)
}
-static int object_create(void *opaque, QemuOpts *opts, Error **errp)
-{
- Error *err = NULL;
- Error *err_end = NULL;
- char *type = NULL;
- char *id = NULL;
- OptsVisitor *ov;
- QDict *pdict;
- bool (*type_predicate)(const char *) = opaque;
- Visitor *v;
-
- ov = opts_visitor_new(opts);
- pdict = qemu_opts_to_qdict(opts, NULL);
- v = opts_get_visitor(ov);
-
- visit_start_struct(v, NULL, NULL, 0, &err);
- if (err) {
- goto out;
- }
-
- qdict_del(pdict, "qom-type");
- visit_type_str(v, "qom-type", &type, &err);
- if (err) {
- goto out;
- }
- if (!type_predicate(type)) {
- visit_end_struct(v, NULL);
- goto out;
- }
-
- qdict_del(pdict, "id");
- visit_type_str(v, "id", &id, &err);
- if (err) {
- goto out_end;
- }
-
- object_add(type, id, pdict, v, &err);
-
-out_end:
- visit_end_struct(v, &err_end);
- if (!err && err_end) {
- qmp_object_del(id, NULL);
- }
- error_propagate(&err, err_end);
-
-out:
- opts_visitor_cleanup(ov);
-
- QDECREF(pdict);
- g_free(id);
- g_free(type);
- if (err) {
- error_report_err(err);
- return -1;
- }
- return 0;
-}
-
static void set_memory_options(uint64_t *ram_slots, ram_addr_t *maxram_size,
MachineClass *mc)
{
@@ -4313,8 +4255,9 @@ int main(int argc, char **argv, char **envp)
socket_init();
if (qemu_opts_foreach(qemu_find_opts("object"),
- object_create,
- object_create_initial, NULL)) {
+ user_creatable_add_opts_foreach,
+ object_create_initial, &err)) {
+ error_report_err(err);
exit(1);
}
@@ -4431,8 +4374,9 @@ int main(int argc, char **argv, char **envp)
}
if (qemu_opts_foreach(qemu_find_opts("object"),
- object_create,
- object_create_delayed, NULL)) {
+ user_creatable_add_opts_foreach,
+ object_create_delayed, &err)) {
+ error_report_err(err);
exit(1);
}
--
2.5.0
- [Qemu-devel] [PULL 05/28] build: Don't redefine 'inline', (continued)
- [Qemu-devel] [PULL 05/28] build: Don't redefine 'inline', Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 06/28] vl: change QEMU state machine for system reset, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 08/28] migration: fix incorrect memory_global_dirty_log_start outside BQL, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 07/28] vl: fix migration from prelaunch state, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 12/28] ipmi: sensor number should not exceed MAX_SENSORS, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 10/28] mptsas: fix memory leak, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 11/28] mptsas: fix wrong formula, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 09/28] mptsas: add missing va_end, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 14/28] qemu-nbd: add support for --object command line arg, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 16/28] nbd: convert qemu-nbd server to use I/O channels for connection setup, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 13/28] qom: add helpers for UserCreatable object types,
Paolo Bonzini <=
- [Qemu-devel] [PULL 15/28] nbd: convert block client to use I/O channels for connection setup, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 17/28] nbd: convert blockdev NBD server to use I/O channels for connection setup, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 19/28] nbd: invert client logic for negotiating protocol version, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 20/28] nbd: make server compliant with fixed newstyle spec, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 21/28] nbd: make client request fixed new style if advertised, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 23/28] nbd: always query export list in fixed new style protocol, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 18/28] nbd: convert to using I/O channels for actual socket I/O, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 24/28] nbd: use "" as a default export name if none provided, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 22/28] nbd: allow setting of an export name for qemu-nbd server, Paolo Bonzini, 2016/02/16
- [Qemu-devel] [PULL 26/28] nbd: enable use of TLS with NBD block driver, Paolo Bonzini, 2016/02/16