* [Qemu-devel] [PULL 1/5] object_add: consolidate error handling
2014-01-28 17:27 [Qemu-devel] [PULL 0/5] QMP queue Luiz Capitulino
@ 2014-01-28 17:27 ` Luiz Capitulino
2014-01-28 17:27 ` [Qemu-devel] [PULL 2/5] vl.c: -object: don't ignore duplicate 'id' Luiz Capitulino
` (4 subsequent siblings)
5 siblings, 0 replies; 18+ messages in thread
From: Luiz Capitulino @ 2014-01-28 17:27 UTC (permalink / raw)
To: anthony; +Cc: qemu-devel
From: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
qmp.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/qmp.c b/qmp.c
index 0f46171..a67e0c4 100644
--- a/qmp.c
+++ b/qmp.c
@@ -549,15 +549,17 @@ void object_add(const char *type, const char *id, const QDict *qdict,
for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
object_property_set(obj, v, e->key, &local_err);
if (local_err) {
- error_propagate(errp, local_err);
- object_unref(obj);
- return;
+ goto out;
}
}
}
object_property_add_child(container_get(object_get_root(), "/objects"),
- id, obj, errp);
+ id, obj, &local_err);
+out:
+ if (local_err) {
+ error_propagate(errp, local_err);
+ }
object_unref(obj);
}
--
1.8.1.4
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [Qemu-devel] [PULL 2/5] vl.c: -object: don't ignore duplicate 'id'
2014-01-28 17:27 [Qemu-devel] [PULL 0/5] QMP queue Luiz Capitulino
2014-01-28 17:27 ` [Qemu-devel] [PULL 1/5] object_add: consolidate error handling Luiz Capitulino
@ 2014-01-28 17:27 ` Luiz Capitulino
2014-01-28 17:27 ` [Qemu-devel] [PULL 3/5] add optional 2nd stage initialization to -object/object-add commands Luiz Capitulino
` (3 subsequent siblings)
5 siblings, 0 replies; 18+ messages in thread
From: Luiz Capitulino @ 2014-01-28 17:27 UTC (permalink / raw)
To: anthony; +Cc: qemu-devel
From: Igor Mammedov <imammedo@redhat.com>
object_property_add_child() may fail if 'id' matches
an already existing object. Which means an incorrect
command line.
So instead of silently ignoring error, report it and
terminate QEMU.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
vl.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/vl.c b/vl.c
index 7f4fe0d..cf3de56 100644
--- a/vl.c
+++ b/vl.c
@@ -2800,6 +2800,7 @@ static int object_create(QemuOpts *opts, void *opaque)
{
const char *type = qemu_opt_get(opts, "qom-type");
const char *id = qemu_opts_id(opts);
+ Error *local_err = NULL;
Object *obj;
g_assert(type != NULL);
@@ -2816,8 +2817,14 @@ static int object_create(QemuOpts *opts, void *opaque)
}
object_property_add_child(container_get(object_get_root(), "/objects"),
- id, obj, NULL);
+ id, obj, &local_err);
+
object_unref(obj);
+ if (local_err) {
+ qerror_report_err(local_err);
+ error_free(local_err);
+ return -1;
+ }
return 0;
}
--
1.8.1.4
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [Qemu-devel] [PULL 3/5] add optional 2nd stage initialization to -object/object-add commands
2014-01-28 17:27 [Qemu-devel] [PULL 0/5] QMP queue Luiz Capitulino
2014-01-28 17:27 ` [Qemu-devel] [PULL 1/5] object_add: consolidate error handling Luiz Capitulino
2014-01-28 17:27 ` [Qemu-devel] [PULL 2/5] vl.c: -object: don't ignore duplicate 'id' Luiz Capitulino
@ 2014-01-28 17:27 ` Luiz Capitulino
2014-01-28 17:34 ` Eric Blake
2014-01-28 17:27 ` [Qemu-devel] [PULL 4/5] virtio_rng: replace custom backend API with UserCreatable.complete() callback Luiz Capitulino
` (2 subsequent siblings)
5 siblings, 1 reply; 18+ messages in thread
From: Luiz Capitulino @ 2014-01-28 17:27 UTC (permalink / raw)
To: anthony; +Cc: qemu-devel
From: Igor Mammedov <imammedo@redhat.com>
Introduces USER_CREATABLE interface that must be implemented by
objects which are designed to created with -object CLI option or
object-add QMP command.
Interface provides an ability to do an optional second stage
initialization of the object created with -object/object-add
commands. By providing complete() callback, which is called
after the object properties were set.
It allows to:
* prevents misusing of -object/object-add by filtering out
objects that are not designed for it.
* generalize second stage backend initialization instead of
adding custom APIs to perform it
* early error detection of backend initialization at -object/
object-add time rather than through a proxy DEVICE object
that tries to use backend.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
backends/rng.c | 5 ++++
include/qom/object_interfaces.h | 62 +++++++++++++++++++++++++++++++++++++++++
qmp.c | 12 ++++++++
qom/Makefile.objs | 1 +
qom/object_interfaces.c | 32 +++++++++++++++++++++
vl.c | 13 +++++++++
6 files changed, 125 insertions(+)
create mode 100644 include/qom/object_interfaces.h
create mode 100644 qom/object_interfaces.c
diff --git a/backends/rng.c b/backends/rng.c
index 85cb83f..7bab806 100644
--- a/backends/rng.c
+++ b/backends/rng.c
@@ -12,6 +12,7 @@
#include "sysemu/rng.h"
#include "qapi/qmp/qerror.h"
+#include "qom/object_interfaces.h"
void rng_backend_request_entropy(RngBackend *s, size_t size,
EntropyReceiveFunc *receive_entropy,
@@ -83,6 +84,10 @@ static const TypeInfo rng_backend_info = {
.instance_init = rng_backend_init,
.class_size = sizeof(RngBackendClass),
.abstract = true,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_USER_CREATABLE },
+ { }
+ }
};
static void register_types(void)
diff --git a/include/qom/object_interfaces.h b/include/qom/object_interfaces.h
new file mode 100644
index 0000000..eaf933f
--- /dev/null
+++ b/include/qom/object_interfaces.h
@@ -0,0 +1,62 @@
+#ifndef OBJECT_INTERFACES_H
+#define OBJECT_INTERFACES_H
+
+#include "qom/object.h"
+
+#define TYPE_USER_CREATABLE "user-creatable"
+
+#define USER_CREATABLE_CLASS(klass) \
+ OBJECT_CLASS_CHECK(UserCreatableClass, (klass), \
+ TYPE_USER_CREATABLE)
+#define USER_CREATABLE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(UserCreatableClass, (obj), \
+ TYPE_USER_CREATABLE)
+#define USER_CREATABLE(obj) \
+ INTERFACE_CHECK(UserCreatable, (obj), \
+ TYPE_USER_CREATABLE)
+
+
+typedef struct UserCreatable {
+ /* <private> */
+ Object Parent;
+} UserCreatable;
+
+/**
+ * UserCreatableClass:
+ * @parent_class: the base class
+ * @complete: callback to be called after @obj's properties are set.
+ *
+ * Interface is designed to work with -object/object-add/object_add
+ * commands.
+ * Interface in mandatory for objects that are designed to be user
+ * creatable (i.e. -object/object-add/object_add, will accept only
+ * objects that inherit this interface).
+ *
+ * iInterface also provides an optional ability to do the second
+ * stage * initialization of the object after its properties were
+ * set.
+ *
+ * For objects created without using -object/object-add/object_add,
+ * @user_creatable_complete() wrapper should be called manually if
+ * object's type implements USER_CREATABLE interface and needs
+ * complete() callback to be called.
+ */
+typedef struct UserCreatableClass {
+ /* <private> */
+ InterfaceClass parent_class;
+
+ /* <public> */
+ void (*complete)(UserCreatable *uc, Error **errp);
+} UserCreatableClass;
+
+/**
+ * user_creatable_complete:
+ * @obj: the object whose complete() method is called if defined
+ * @errp: if an error occurs, a pointer to an area to store the error
+ *
+ * Wrapper to call complete() method if one of types it's inherited
+ * from implements USER_CREATABLE interface, otherwise the call does
+ * nothing.
+ */
+void user_creatable_complete(Object *obj, Error **errp);
+#endif
diff --git a/qmp.c b/qmp.c
index a67e0c4..d0d98e7 100644
--- a/qmp.c
+++ b/qmp.c
@@ -27,6 +27,7 @@
#include "qapi/qmp/qobject.h"
#include "qapi/qmp-input-visitor.h"
#include "hw/boards.h"
+#include "qom/object_interfaces.h"
NameInfo *qmp_query_name(Error **errp)
{
@@ -554,6 +555,17 @@ void object_add(const char *type, const char *id, const QDict *qdict,
}
}
+ if (!object_dynamic_cast(obj, TYPE_USER_CREATABLE)) {
+ error_setg(&local_err, "object '%s' isn't supported by object-add",
+ id);
+ goto out;
+ }
+
+ user_creatable_complete(obj, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
object_property_add_child(container_get(object_get_root(), "/objects"),
id, obj, &local_err);
out:
diff --git a/qom/Makefile.objs b/qom/Makefile.objs
index 6a93ac7..985003b 100644
--- a/qom/Makefile.objs
+++ b/qom/Makefile.objs
@@ -1,2 +1,3 @@
common-obj-y = object.o container.o qom-qobject.o
common-obj-y += cpu.o
+common-obj-y += object_interfaces.o
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
new file mode 100644
index 0000000..6360818
--- /dev/null
+++ b/qom/object_interfaces.c
@@ -0,0 +1,32 @@
+#include "qom/object_interfaces.h"
+#include "qemu/module.h"
+
+void user_creatable_complete(Object *obj, Error **errp)
+{
+
+ UserCreatableClass *ucc;
+ UserCreatable *uc =
+ (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
+
+ if (!uc) {
+ return;
+ }
+
+ ucc = USER_CREATABLE_GET_CLASS(uc);
+ if (ucc->complete) {
+ ucc->complete(uc, errp);
+ }
+}
+
+static void register_types(void)
+{
+ static const TypeInfo uc_interface_info = {
+ .name = TYPE_USER_CREATABLE,
+ .parent = TYPE_INTERFACE,
+ .class_size = sizeof(UserCreatableClass),
+ };
+
+ type_register_static(&uc_interface_info);
+}
+
+type_init(register_types)
diff --git a/vl.c b/vl.c
index cf3de56..9c2619f 100644
--- a/vl.c
+++ b/vl.c
@@ -170,6 +170,7 @@ int main(int argc, char **argv)
#include "ui/qemu-spice.h"
#include "qapi/string-input-visitor.h"
+#include "qom/object_interfaces.h"
//#define DEBUG_NET
//#define DEBUG_SLIRP
@@ -2816,9 +2817,21 @@ static int object_create(QemuOpts *opts, void *opaque)
return -1;
}
+ if (!object_dynamic_cast(obj, TYPE_USER_CREATABLE)) {
+ error_setg(&local_err, "object '%s' isn't supported by -object",
+ id);
+ goto out;
+ }
+
+ user_creatable_complete(obj, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
object_property_add_child(container_get(object_get_root(), "/objects"),
id, obj, &local_err);
+out:
object_unref(obj);
if (local_err) {
qerror_report_err(local_err);
--
1.8.1.4
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [Qemu-devel] [PULL 3/5] add optional 2nd stage initialization to -object/object-add commands
2014-01-28 17:27 ` [Qemu-devel] [PULL 3/5] add optional 2nd stage initialization to -object/object-add commands Luiz Capitulino
@ 2014-01-28 17:34 ` Eric Blake
2014-01-28 17:49 ` Luiz Capitulino
0 siblings, 1 reply; 18+ messages in thread
From: Eric Blake @ 2014-01-28 17:34 UTC (permalink / raw)
To: Luiz Capitulino, anthony; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 1007 bytes --]
On 01/28/2014 10:27 AM, Luiz Capitulino wrote:
> From: Igor Mammedov <imammedo@redhat.com>
>
> Introduces USER_CREATABLE interface that must be implemented by
> objects which are designed to created with -object CLI option or
> object-add QMP command.
>
> +/**
> + * UserCreatableClass:
> + * @parent_class: the base class
> + * @complete: callback to be called after @obj's properties are set.
> + *
> + * Interface is designed to work with -object/object-add/object_add
> + * commands.
> + * Interface in mandatory for objects that are designed to be user
s/in/is/
> + * creatable (i.e. -object/object-add/object_add, will accept only
> + * objects that inherit this interface).
> + *
> + * iInterface also provides an optional ability to do the second
s/iInterface/Interface/
> + * stage * initialization of the object after its properties were
Spurious *
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 604 bytes --]
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [Qemu-devel] [PULL 3/5] add optional 2nd stage initialization to -object/object-add commands
2014-01-28 17:34 ` Eric Blake
@ 2014-01-28 17:49 ` Luiz Capitulino
0 siblings, 0 replies; 18+ messages in thread
From: Luiz Capitulino @ 2014-01-28 17:49 UTC (permalink / raw)
To: Eric Blake; +Cc: qemu-devel, anthony
On Tue, 28 Jan 2014 10:34:56 -0700
Eric Blake <eblake@redhat.com> wrote:
> On 01/28/2014 10:27 AM, Luiz Capitulino wrote:
> > From: Igor Mammedov <imammedo@redhat.com>
> >
> > Introduces USER_CREATABLE interface that must be implemented by
> > objects which are designed to created with -object CLI option or
> > object-add QMP command.
> >
>
> > +/**
> > + * UserCreatableClass:
> > + * @parent_class: the base class
> > + * @complete: callback to be called after @obj's properties are set.
> > + *
> > + * Interface is designed to work with -object/object-add/object_add
> > + * commands.
> > + * Interface in mandatory for objects that are designed to be user
>
> s/in/is/
>
> > + * creatable (i.e. -object/object-add/object_add, will accept only
> > + * objects that inherit this interface).
> > + *
> > + * iInterface also provides an optional ability to do the second
>
> s/iInterface/Interface/
>
> > + * stage * initialization of the object after its properties were
>
> Spurious *
I've fixed those typos and already updated my tree. Thanks Eric.
^ permalink raw reply [flat|nested] 18+ messages in thread
* [Qemu-devel] [PULL 4/5] virtio_rng: replace custom backend API with UserCreatable.complete() callback
2014-01-28 17:27 [Qemu-devel] [PULL 0/5] QMP queue Luiz Capitulino
` (2 preceding siblings ...)
2014-01-28 17:27 ` [Qemu-devel] [PULL 3/5] add optional 2nd stage initialization to -object/object-add commands Luiz Capitulino
@ 2014-01-28 17:27 ` Luiz Capitulino
2014-01-28 17:27 ` [Qemu-devel] [PULL 5/5] monitor: Cleanup mon->outbuf on write error Luiz Capitulino
2014-02-01 23:41 ` [Qemu-devel] [PULL 0/5] QMP queue Peter Maydell
5 siblings, 0 replies; 18+ messages in thread
From: Luiz Capitulino @ 2014-01-28 17:27 UTC (permalink / raw)
To: anthony; +Cc: qemu-devel
From: Igor Mammedov <imammedo@redhat.com>
in addition fix default backend leak by releasing it if its
initialization failed.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
backends/rng.c | 12 ++++++++++--
hw/virtio/virtio-rng.c | 15 +++++++++------
include/sysemu/rng.h | 11 -----------
3 files changed, 19 insertions(+), 19 deletions(-)
diff --git a/backends/rng.c b/backends/rng.c
index 7bab806..8b8d5a4 100644
--- a/backends/rng.c
+++ b/backends/rng.c
@@ -41,9 +41,9 @@ static bool rng_backend_prop_get_opened(Object *obj, Error **errp)
return s->opened;
}
-void rng_backend_open(RngBackend *s, Error **errp)
+static void rng_backend_complete(UserCreatable *uc, Error **errp)
{
- object_property_set_bool(OBJECT(s), true, "opened", errp);
+ object_property_set_bool(OBJECT(uc), true, "opened", errp);
}
static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp)
@@ -77,12 +77,20 @@ static void rng_backend_init(Object *obj)
NULL);
}
+static void rng_backend_class_init(ObjectClass *oc, void *data)
+{
+ UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+
+ ucc->complete = rng_backend_complete;
+}
+
static const TypeInfo rng_backend_info = {
.name = TYPE_RNG_BACKEND,
.parent = TYPE_OBJECT,
.instance_size = sizeof(RngBackend),
.instance_init = rng_backend_init,
.class_size = sizeof(RngBackendClass),
+ .class_init = rng_backend_class_init,
.abstract = true,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index 755fdee..a16e3bc 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -15,6 +15,7 @@
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-rng.h"
#include "sysemu/rng.h"
+#include "qom/object_interfaces.h"
static bool is_guest_ready(VirtIORNG *vrng)
{
@@ -148,6 +149,14 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
if (vrng->conf.rng == NULL) {
vrng->conf.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
+ user_creatable_complete(OBJECT(vrng->conf.default_backend),
+ &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ object_unref(OBJECT(vrng->conf.default_backend));
+ return;
+ }
+
object_property_add_child(OBJECT(dev),
"default-backend",
OBJECT(vrng->conf.default_backend),
@@ -166,12 +175,6 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
return;
}
- rng_backend_open(vrng->rng, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
-
vrng->vq = virtio_add_queue(vdev, 8, handle_input);
assert(vrng->conf.max_bytes <= INT64_MAX);
diff --git a/include/sysemu/rng.h b/include/sysemu/rng.h
index 7637fac..0a27c9b 100644
--- a/include/sysemu/rng.h
+++ b/include/sysemu/rng.h
@@ -79,15 +79,4 @@ void rng_backend_request_entropy(RngBackend *s, size_t size,
* to stop tracking any request.
*/
void rng_backend_cancel_requests(RngBackend *s);
-
-/**
- * rng_backend_open:
- * @s: the backend to open
- * @errp: a pointer to return the #Error object if an error occurs.
- *
- * This function will open the backend if it is not already open. Calling this
- * function on an already opened backend will not result in an error.
- */
-void rng_backend_open(RngBackend *s, Error **errp);
-
#endif
--
1.8.1.4
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [Qemu-devel] [PULL 5/5] monitor: Cleanup mon->outbuf on write error
2014-01-28 17:27 [Qemu-devel] [PULL 0/5] QMP queue Luiz Capitulino
` (3 preceding siblings ...)
2014-01-28 17:27 ` [Qemu-devel] [PULL 4/5] virtio_rng: replace custom backend API with UserCreatable.complete() callback Luiz Capitulino
@ 2014-01-28 17:27 ` Luiz Capitulino
2014-02-01 23:41 ` [Qemu-devel] [PULL 0/5] QMP queue Peter Maydell
5 siblings, 0 replies; 18+ messages in thread
From: Luiz Capitulino @ 2014-01-28 17:27 UTC (permalink / raw)
To: anthony; +Cc: qemu-devel
From: Stratos Psomadakis <psomas@grnet.gr>
In case monitor_flush() fails to write the contents of mon->outbuf to
the output device, mon->outbuf is not cleaned up properly. Check the
return code of the qemu_chr_fe_write() function and cleanup the outbuf
if it fails.
References: http://lists.nongnu.org/archive/html/qemu-devel/2014-01/msg02890.html
Signed-off-by: Stratos Psomadakis <psomas@grnet.gr>
Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
monitor.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/monitor.c b/monitor.c
index 80456fb..cba56bc 100644
--- a/monitor.c
+++ b/monitor.c
@@ -288,8 +288,8 @@ void monitor_flush(Monitor *mon)
if (len && !mon->mux_out) {
rc = qemu_chr_fe_write(mon->chr, (const uint8_t *) buf, len);
- if (rc == len) {
- /* all flushed */
+ if ((rc < 0 && errno != EAGAIN) || (rc == len)) {
+ /* all flushed or error */
QDECREF(mon->outbuf);
mon->outbuf = qstring_new();
return;
--
1.8.1.4
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [Qemu-devel] [PULL 0/5] QMP queue
2014-01-28 17:27 [Qemu-devel] [PULL 0/5] QMP queue Luiz Capitulino
` (4 preceding siblings ...)
2014-01-28 17:27 ` [Qemu-devel] [PULL 5/5] monitor: Cleanup mon->outbuf on write error Luiz Capitulino
@ 2014-02-01 23:41 ` Peter Maydell
5 siblings, 0 replies; 18+ messages in thread
From: Peter Maydell @ 2014-02-01 23:41 UTC (permalink / raw)
To: Luiz Capitulino; +Cc: QEMU Developers, Anthony Liguori
On 28 January 2014 17:27, Luiz Capitulino <lcapitulino@redhat.com> wrote:
> The changes (since 0169c511554cb0014a00290b0d3d26c31a49818f) are available
> in the following repository:
>
> git://repo.or.cz/qemu/qmp-unstable.git queue/qmp
Applied, thanks.
-- PMM
^ permalink raw reply [flat|nested] 18+ messages in thread