[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[RFC 2/5] qmp: add QMP command virtio-status
From: |
Laurent Vivier |
Subject: |
[RFC 2/5] qmp: add QMP command virtio-status |
Date: |
Thu, 2 Apr 2020 12:02:59 +0200 |
This new command shows the status of a VirtIODevice
(features, endianness and number of virtqueues)
Signed-off-by: Laurent Vivier <address@hidden>
---
hw/virtio/virtio-stub.c | 5 ++++
hw/virtio/virtio.c | 51 ++++++++++++++++++++++++++++++++
qapi/virtio.json | 65 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 121 insertions(+)
diff --git a/hw/virtio/virtio-stub.c b/hw/virtio/virtio-stub.c
index d9e4a815ecf1..8fe2d6cd8892 100644
--- a/hw/virtio/virtio-stub.c
+++ b/hw/virtio/virtio-stub.c
@@ -12,3 +12,8 @@ VirtioInfoList *qmp_query_virtio(Error **errp)
{
return qmp_virtio_unsupported(errp);
}
+
+VirtioStatus *qmp_virtio_status(const char* path, Error **errp)
+{
+ return qmp_virtio_unsupported(errp);
+}
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 3cebc3d169c8..7f6e21e4ab2c 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3839,6 +3839,57 @@ VirtioInfoList *qmp_query_virtio(Error **errp)
return list;
}
+static VirtIODevice *virtio_device_find(const char *path)
+{
+ VirtIODevice *vdev;
+
+ QTAILQ_FOREACH(vdev, &virtio_list, next) {
+ DeviceState *dev = DEVICE(vdev);
+
+ if (strcmp(dev->canonical_path, path) != 0) {
+ continue;
+ }
+ return vdev;
+ }
+
+ return NULL;
+}
+
+VirtioStatus *qmp_virtio_status(const char* path, Error **errp)
+{
+ VirtIODevice *vdev;
+ VirtioStatus *status;
+
+ vdev = virtio_device_find(path);
+ if (vdev == NULL) {
+ error_setg(errp, "Path %s is not a VirtIO device", path);
+ return NULL;
+ }
+
+ status = g_new0(VirtioStatus, 1);
+ status->guest_features = vdev->guest_features;
+ status->host_features = vdev->host_features;
+ status->backend_features = vdev->backend_features;
+ status->device_id = vdev->device_id;
+
+ switch (vdev->device_endian) {
+ case VIRTIO_DEVICE_ENDIAN_LITTLE:
+ status->device_endian = g_strdup("little");
+ break;
+ case VIRTIO_DEVICE_ENDIAN_BIG:
+ status->device_endian = g_strdup("big");
+ break;
+ case VIRTIO_DEVICE_ENDIAN_UNKNOWN:
+ default:
+ status->device_endian = g_strdup("unknown");
+ break;
+ }
+
+ status->num_vqs = virtio_get_num_queues(vdev);
+
+ return status;
+}
+
static const TypeInfo virtio_device_info = {
.name = TYPE_VIRTIO_DEVICE,
.parent = TYPE_DEVICE,
diff --git a/qapi/virtio.json b/qapi/virtio.json
index 2a95d08a8b9e..2af4d95b9893 100644
--- a/qapi/virtio.json
+++ b/qapi/virtio.json
@@ -52,3 +52,68 @@
##
{ 'command': 'query-virtio', 'returns': ['VirtioInfo'] }
+
+##
+# @VirtioStatus:
+#
+# @device_id: VirtIODevice status
+#
+# @device_endian: VirtIODevice device_endian
+#
+# @guest_features: VirtIODevice guest_features
+#
+# @host_features: VirtIODevice host_features
+#
+# @backend_features: VirtIODevice backend_features
+#
+# @num_vqs: number of VirtIODevice queues
+#
+# Since: 5.1
+#
+##
+
+{ 'struct': 'VirtioStatus',
+ 'data': {
+ 'device_id': 'int',
+ 'device_endian': 'str',
+ 'guest_features': 'uint64',
+ 'host_features': 'uint64',
+ 'backend_features': 'uint64',
+ 'num_vqs': 'uint16'
+ }
+}
+
+##
+# @virtio-status:
+#
+# Return the status of virtio device
+#
+# @path: QOBject path of the VirtIODevice
+#
+# Returns: status of the VirtIODevice
+#
+# Since: 5.1
+#
+# Example:
+#
+# -> { "execute": "virtio-status",
+# "arguments": {
+# "path": "/machine/peripheral-anon/device[3]/virtio-backend"
+# }
+# }
+# <- { "return": {
+# "backend_features": 0,
+# "guest_features": 5111807911,
+# "num_vqs": 3,
+# "host_features": 6337593319,
+# "device_endian": "little",
+# "device_id": 1
+# }
+# }
+#
+##
+
+{ 'command': 'virtio-status',
+ 'data': { 'path': 'str' },
+ 'returns': 'VirtioStatus'
+}
--
2.25.1
- [RFC 0/5] hmp,qmp: Add some commands to introspect virtio devices, Laurent Vivier, 2020/04/02
- [RFC 1/5] qmp: add QMP command query-virtio, Laurent Vivier, 2020/04/02
- [RFC 2/5] qmp: add QMP command virtio-status,
Laurent Vivier <=
- [RFC 3/5] qmp: add QMP command virtio-queue-status, Laurent Vivier, 2020/04/02
- [RFC 4/5] qmp: add QMP command virtio-queue-element, Laurent Vivier, 2020/04/02
- [RFC 5/5] hmp: add virtio commands, Laurent Vivier, 2020/04/02
- Re: [RFC 0/5] hmp, qmp: Add some commands to introspect virtio devices, Marc-André Lureau, 2020/04/02