[Accel-config] [PATCH v2 04/12] accel-config: Add mdev json support

From: Ramesh Thomas <ramesh.thomas(a)intel.com>

Load the mdevs stored in device contexts into json objects as array of
mdev structures containing uuid and types

"list" command will list the mdevs structures under each device

Signed-off-by: Ramesh Thomas <ramesh.thomas(a)intel.com>
---
 util/json.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/util/json.c b/util/json.c
index 6f4b4d1..8ff89d0 100644
--- a/util/json.c
+++ b/util/json.c
@@ -153,6 +153,12 @@ struct json_object *util_device_to_json(struct accfg_device *device,
 	unsigned long ulong_val;
 	unsigned long long ullong_val;
 	bool new_bool;
+	struct accfg_device_mdev *mdev;
+	struct json_object *json_uuid;
+	struct json_object *json_mtype;
+	char uuid_string[UUID_STR_LEN];
+	int mdev_found = 0;
+	struct json_object *json_mdev;
 
 	if (!jdevice)
 		return NULL;
@@ -339,6 +345,38 @@ struct json_object *util_device_to_json(struct accfg_device *device,
 		goto err;
 	json_object_object_add(jdevice, "clients", jobj);
 
+	jobj = json_object_new_array();
+	accfg_device_mdev_foreach(device, mdev) {
+		uuid_t uuid;
+		const char *mdev_type;
+
+		accfg_mdev_get_uuid(mdev, uuid);
+		uuid_unparse(uuid, uuid_string);
+		json_uuid = json_object_new_string(uuid_string);
+		if (!json_uuid)
+			break;
+		mdev_type = accfg_mdev_basenames[accfg_mdev_get_type(mdev)];
+		json_mtype = json_object_new_string(mdev_type);
+		if (!json_mtype) {
+			json_object_put(json_uuid);
+			break;
+		}
+		json_mdev = json_object_new_object();
+		if (!json_mdev) {
+			json_object_put(json_uuid);
+			json_object_put(json_mtype);
+			break;
+		}
+		json_object_object_add(json_mdev, "uuid", json_uuid);
+		json_object_object_add(json_mdev, "type", json_mtype);
+		json_object_array_add(jobj, json_mdev);
+		mdev_found++;
+	}
+	if (mdev_found)
+		json_object_object_add(jdevice, "mdevs", jobj);
+	else
+		json_object_put(jobj);
+
 	free(error);
 	return jdevice;
 err:
-- 
2.26.2