diff --git a/include/spdk/vhost.h b/include/spdk/vhost.h
index 30bd8b13d..7af284d84 100644
--- a/include/spdk/vhost.h
+++ b/include/spdk/vhost.h
@@ -42,6 +42,7 @@
 #include "spdk/stdinc.h"
 
 #include "spdk/event.h"
+#include "spdk/json.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -77,6 +78,15 @@ int spdk_vhost_init(void);
  */
 void spdk_vhost_fini(spdk_vhost_fini_cb fini_cb);
 
+
+/**
+ * Write vhost subsystem configuration into provided JSON context.
+ *
+ * \param w JSON write context
+ * \param done_ev call this event when done.
+ */
+void spdk_vhost_config_json(struct spdk_json_write_ctx *w, struct spdk_event *done_ev);
+
 /**
  * Deinit vhost application. This is called once by SPDK app layer.
  */
diff --git a/lib/event/subsystems/vhost/vhost.c b/lib/event/subsystems/vhost/vhost.c
index 078c3664a..1fdbc6aa5 100644
--- a/lib/event/subsystems/vhost/vhost.c
+++ b/lib/event/subsystems/vhost/vhost.c
@@ -64,6 +64,7 @@ static struct spdk_subsystem g_spdk_subsystem_vhost = {
 	.init = spdk_vhost_subsystem_init,
 	.fini = spdk_vhost_subsystem_fini,
 	.config = NULL,
+	.write_config_json = spdk_vhost_config_json,
 };
 
 SPDK_SUBSYSTEM_REGISTER(g_spdk_subsystem_vhost);
diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
index cf4c3cead..5679a1847 100644
--- a/lib/vhost/vhost.c
+++ b/lib/vhost/vhost.c
@@ -1158,11 +1158,10 @@ session_shutdown(void *arg)
 }
 
 void
-spdk_vhost_dump_config_json(struct spdk_vhost_dev *vdev,
-			    struct spdk_json_write_ctx *w)
+spdk_vhost_dump_info_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
 {
-	assert(vdev->backend->dump_config_json != NULL);
-	vdev->backend->dump_config_json(vdev, w);
+	assert(vdev->backend->dump_info_json != NULL);
+	vdev->backend->dump_info_json(vdev, w);
 }
 
 int
@@ -1368,5 +1367,39 @@ spdk_vhost_fini(spdk_vhost_fini_cb fini_cb)
 	pthread_detach(tid);
 }
 
+struct spdk_vhost_write_config_json_ctx {
+	struct spdk_json_write_ctx *w;
+	struct spdk_event *done_ev;
+};
+
+static int
+spdk_vhost_config_json_cb(struct spdk_vhost_dev *vdev, void *arg)
+{
+	struct spdk_vhost_write_config_json_ctx *ctx = arg;
+
+	if (vdev == NULL) {
+		spdk_json_write_array_end(ctx->w);
+		spdk_event_call(ctx->done_ev);
+		free(ctx);
+		return 0;
+	}
+
+	vdev->backend->write_config_json(vdev, ctx->w);
+	return 0;
+}
+
+void
+spdk_vhost_config_json(struct spdk_json_write_ctx *w, struct spdk_event *done_ev)
+{
+	struct spdk_vhost_write_config_json_ctx *ctx = calloc(1, sizeof(*ctx));
+
+	ctx->w = w;
+	ctx->done_ev = done_ev;
+
+	spdk_json_write_array_begin(w);
+
+	spdk_vhost_call_external_event_foreach(spdk_vhost_config_json_cb, ctx);
+}
+
 SPDK_LOG_REGISTER_COMPONENT("vhost", SPDK_LOG_VHOST)
 SPDK_LOG_REGISTER_COMPONENT("vhost_ring", SPDK_LOG_VHOST_RING)
diff --git a/lib/vhost/vhost_blk.c b/lib/vhost/vhost_blk.c
index 179d54a36..9cbd6c8ab 100644
--- a/lib/vhost/vhost_blk.c
+++ b/lib/vhost/vhost_blk.c
@@ -595,7 +595,7 @@ err:
 }
 
 static void
-spdk_vhost_blk_dump_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
+spdk_vhost_blk_dump_info_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
 {
 	struct spdk_bdev *bdev = spdk_vhost_blk_get_dev(vdev);
 	struct spdk_vhost_blk_dev *bvdev = to_blk_dev(vdev);
@@ -617,6 +617,28 @@ spdk_vhost_blk_dump_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_wr
 	spdk_json_write_object_end(w);
 }
 
+static void
+spdk_vhost_blk_write_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
+{
+	struct spdk_vhost_blk_dev *bvdev = to_blk_dev(vdev);
+
+	if (!bvdev->bdev) {
+		return;
+	}
+
+	spdk_json_write_object_begin(w);
+	spdk_json_write_named_string(w, "method", "construct_vhost_blk_controller");
+
+	spdk_json_write_named_object_begin(w, "params");
+	spdk_json_write_named_string(w, "ctrlr", vdev->name);
+	spdk_json_write_named_string(w, "dev_name", spdk_bdev_get_name(bvdev->bdev));
+	spdk_json_write_named_string(w, "cpumask", spdk_cpuset_fmt(vdev->cpumask));
+	spdk_json_write_named_bool(w, "readonly", bvdev->readonly);
+	spdk_json_write_object_end(w);
+
+	spdk_json_write_object_end(w);
+}
+
 static int spdk_vhost_blk_destroy(struct spdk_vhost_dev *dev);
 
 static int
@@ -672,7 +694,8 @@ static const struct spdk_vhost_dev_backend vhost_blk_device_backend = {
 	.start_device =  spdk_vhost_blk_start,
 	.stop_device = spdk_vhost_blk_stop,
 	.vhost_get_config = spdk_vhost_blk_get_config,
-	.dump_config_json = spdk_vhost_blk_dump_config_json,
+	.dump_info_json = spdk_vhost_blk_dump_info_json,
+	.write_config_json = spdk_vhost_blk_write_config_json,
 	.remove_device = spdk_vhost_blk_destroy,
 };
 
diff --git a/lib/vhost/vhost_internal.h b/lib/vhost/vhost_internal.h
index 0cd1e6dda..4d0daaf9d 100644
--- a/lib/vhost/vhost_internal.h
+++ b/lib/vhost/vhost_internal.h
@@ -128,7 +128,8 @@ struct spdk_vhost_dev_backend {
 	int (*vhost_set_config)(struct spdk_vhost_dev *vdev, uint8_t *config,
 				uint32_t offset, uint32_t size, uint32_t flags);
 
-	void (*dump_config_json)(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w);
+	void (*dump_info_json)(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w);
+	void (*write_config_json)(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w);
 	int (*remove_device)(struct spdk_vhost_dev *vdev);
 };
 
@@ -248,7 +249,7 @@ int spdk_vhost_dev_unregister(struct spdk_vhost_dev *vdev);
 
 int spdk_vhost_scsi_controller_construct(void);
 int spdk_vhost_blk_controller_construct(void);
-void spdk_vhost_dump_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w);
+void spdk_vhost_dump_info_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w);
 void spdk_vhost_dev_backend_event_done(void *event_ctx, int response);
 void spdk_vhost_lock(void);
 void spdk_vhost_unlock(void);
diff --git a/lib/vhost/vhost_nvme.c b/lib/vhost/vhost_nvme.c
index cee9910ef..e50ea0d40 100644
--- a/lib/vhost/vhost_nvme.c
+++ b/lib/vhost/vhost_nvme.c
@@ -1005,7 +1005,7 @@ err:
 }
 
 static void
-spdk_vhost_nvme_dump_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
+spdk_vhost_nvme_dump_info_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
 {
 	struct spdk_vhost_nvme_dev *nvme = to_nvme_dev(vdev);
 	struct spdk_vhost_nvme_ns *ns_dev;
@@ -1043,7 +1043,7 @@ spdk_vhost_nvme_dump_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_w
 static const struct spdk_vhost_dev_backend spdk_vhost_nvme_device_backend = {
 	.start_device = spdk_vhost_nvme_start_device,
 	.stop_device = spdk_vhost_nvme_stop_device,
-	.dump_config_json = spdk_vhost_nvme_dump_config_json,
+	.dump_info_json = spdk_vhost_nvme_dump_info_json,
 	.remove_device = spdk_vhost_nvme_dev_remove,
 };
 
diff --git a/lib/vhost/vhost_rpc.c b/lib/vhost/vhost_rpc.c
index 01b2260b9..b76482047 100644
--- a/lib/vhost/vhost_rpc.c
+++ b/lib/vhost/vhost_rpc.c
@@ -476,7 +476,7 @@ spdk_rpc_get_vhost_controllers_cb(struct spdk_vhost_dev *vdev, void *arg)
 	spdk_json_write_name(ctx->w, "backend_specific");
 
 	spdk_json_write_object_begin(ctx->w);
-	spdk_vhost_dump_config_json(vdev, ctx->w);
+	spdk_vhost_dump_info_json(vdev, ctx->w);
 	spdk_json_write_object_end(ctx->w);
 
 	spdk_json_write_object_end(ctx->w); // ctrl
diff --git a/lib/vhost/vhost_scsi.c b/lib/vhost/vhost_scsi.c
index bf340bd42..20f9b82cb 100644
--- a/lib/vhost/vhost_scsi.c
+++ b/lib/vhost/vhost_scsi.c
@@ -107,7 +107,10 @@ struct spdk_vhost_scsi_task {
 
 static int spdk_vhost_scsi_start(struct spdk_vhost_dev *, void *);
 static int spdk_vhost_scsi_stop(struct spdk_vhost_dev *, void *);
-static void spdk_vhost_scsi_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w);
+static void spdk_vhost_scsi_dump_info_json(struct spdk_vhost_dev *vdev,
+		struct spdk_json_write_ctx *w);
+static void spdk_vhost_scsi_write_config_json(struct spdk_vhost_dev *vdev,
+		struct spdk_json_write_ctx *w);
 static int spdk_vhost_scsi_dev_remove(struct spdk_vhost_dev *vdev);
 
 const struct spdk_vhost_dev_backend spdk_vhost_scsi_device_backend = {
@@ -115,7 +118,8 @@ const struct spdk_vhost_dev_backend spdk_vhost_scsi_device_backend = {
 	.disabled_features = SPDK_VHOST_SCSI_DISABLED_FEATURES,
 	.start_device =  spdk_vhost_scsi_start,
 	.stop_device = spdk_vhost_scsi_stop,
-	.dump_config_json = spdk_vhost_scsi_config_json,
+	.dump_info_json = spdk_vhost_scsi_dump_info_json,
+	.write_config_json = spdk_vhost_scsi_write_config_json,
 	.remove_device = spdk_vhost_scsi_dev_remove,
 };
 
@@ -1167,7 +1171,7 @@ err:
 }
 
 static void
-spdk_vhost_scsi_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
+spdk_vhost_scsi_dump_info_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
 {
 	struct spdk_scsi_dev *sdev;
 	struct spdk_scsi_lun *lun;
@@ -1221,6 +1225,44 @@ spdk_vhost_scsi_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_
 	spdk_json_write_array_end(w);
 }
 
+static void
+spdk_vhost_scsi_write_config_json(struct spdk_vhost_dev *vdev, struct spdk_json_write_ctx *w)
+{
+	struct spdk_vhost_scsi_dev *svdev = to_scsi_dev(vdev);
+	struct spdk_scsi_lun *lun;
+	uint32_t i;
+
+	spdk_json_write_object_begin(w);
+	spdk_json_write_named_string(w, "method", "construct_vhost_scsi_controller");
+
+	spdk_json_write_named_object_begin(w, "params");
+	spdk_json_write_named_string(w, "ctrlr", vdev->name);
+	spdk_json_write_named_string(w, "cpumask", spdk_cpuset_fmt(vdev->cpumask));
+	spdk_json_write_object_end(w);
+
+	spdk_json_write_object_end(w);
+
+	for (i = 0; i < SPDK_COUNTOF(svdev->scsi_dev); i++) {
+		if (svdev->scsi_dev[i] == NULL || svdev->scsi_dev_state[i].removed) {
+			continue;
+		}
+
+		lun = spdk_scsi_dev_get_lun(svdev->scsi_dev[i], 0);
+
+		spdk_json_write_object_begin(w);
+		spdk_json_write_named_string(w, "method", "add_vhost_scsi_lun");
+
+		spdk_json_write_named_object_begin(w, "params");
+		spdk_json_write_named_string(w, "ctrlr", vdev->name);
+		spdk_json_write_named_uint32(w, "scsi_target_num", i);
+
+		spdk_json_write_named_string(w, "bdev_name", spdk_scsi_lun_get_bdev_name(lun));
+		spdk_json_write_object_end(w);
+
+		spdk_json_write_object_end(w);
+	}
+}
+
 SPDK_LOG_REGISTER_COMPONENT("vhost_scsi", SPDK_LOG_VHOST_SCSI)
 SPDK_LOG_REGISTER_COMPONENT("vhost_scsi_queue", SPDK_LOG_VHOST_SCSI_QUEUE)
 SPDK_LOG_REGISTER_COMPONENT("vhost_scsi_data", SPDK_LOG_VHOST_SCSI_DATA)
diff --git a/test/unit/lib/vhost/test_vhost.c b/test/unit/lib/vhost/test_vhost.c
index ba88688c7..e6cf7c900 100644
--- a/test/unit/lib/vhost/test_vhost.c
+++ b/test/unit/lib/vhost/test_vhost.c
@@ -38,6 +38,8 @@
 #include "spdk_internal/mock.h"
 #include "spdk/io_channel.h"
 
+#include "unit/lib/json_mock.c"
+
 struct spdk_conf_section {
 	struct spdk_conf_section *next;
 	char *name;
@@ -87,16 +89,6 @@ DEFINE_STUB_V(spdk_vhost_call_external_event, (const char *ctrlr_name, spdk_vhos
 DEFINE_STUB(spdk_vhost_vring_desc_has_next, bool, (struct vring_desc *cur_desc), false);
 DEFINE_STUB_VP(spdk_vhost_gpa_to_vva, (struct spdk_vhost_dev *vdev, uint64_t addr), {0});
 DEFINE_STUB(spdk_scsi_dev_get_id, int, (const struct spdk_scsi_dev *dev), {0});
-DEFINE_STUB(spdk_json_write_null, int, (struct spdk_json_write_ctx *w), 0);
-DEFINE_STUB(spdk_json_write_bool, int, (struct spdk_json_write_ctx *w, bool val), 0);
-DEFINE_STUB(spdk_json_write_name, int, (struct spdk_json_write_ctx *w, const char *name), 0);
-DEFINE_STUB(spdk_json_write_object_begin, int, (struct spdk_json_write_ctx *w), 0);
-DEFINE_STUB(spdk_json_write_uint32, int, (struct spdk_json_write_ctx *w, uint32_t val), 0);
-DEFINE_STUB(spdk_json_write_int32, int, (struct spdk_json_write_ctx *w, int32_t val), 0);
-DEFINE_STUB(spdk_json_write_string, int, (struct spdk_json_write_ctx *w, const char *val), 0);
-DEFINE_STUB(spdk_json_write_array_begin, int, (struct spdk_json_write_ctx *w), 0);
-DEFINE_STUB(spdk_json_write_object_end, int, (struct spdk_json_write_ctx *w), 0);
-DEFINE_STUB(spdk_json_write_array_end, int, (struct spdk_json_write_ctx *w), 0);
 
 /* This sets spdk_vhost_dev_unregister to either to fail or success */
 DEFINE_STUB(spdk_vhost_dev_unregister_fail, bool, (void), false);
diff --git a/test/unit/lib/vhost/vhost.c/vhost_ut.c b/test/unit/lib/vhost/vhost.c/vhost_ut.c
index 10717ffee..ce87a3302 100644
--- a/test/unit/lib/vhost/vhost.c/vhost_ut.c
+++ b/test/unit/lib/vhost/vhost.c/vhost_ut.c
@@ -38,6 +38,7 @@
 #include "spdk/io_channel.h"
 #include "spdk_internal/mock.h"
 #include "common/lib/test_env.c"
+#include "unit/lib/json_mock.c"
 
 #include "vhost/vhost.c"