qemu/vdpa-support-resizing-virtio-blk-capacity-online-for.patch

From 8c65e8d7c923ade6f3c7fbef43000562d4733629 Mon Sep 17 00:00:00 2001
From: fangyi <eric.fangyi@huawei.com>
Date: Sat, 7 Sep 2024 07:11:07 +0000
Subject: [PATCH 2/6] vdpa: support resizing virtio-blk capacity online for
 kernel vdpa

Signed-off-by: fangyi <eric.fangyi@huawei.com>
---
 hw/virtio/vdpa-dev.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/virtio/vdpa-dev.c b/hw/virtio/vdpa-dev.c
index 91e71847b0..bf4b3ec3fd 100644
--- a/hw/virtio/vdpa-dev.c
+++ b/hw/virtio/vdpa-dev.c
@@ -31,6 +31,7 @@
 #include "hw/virtio/vdpa-dev-mig.h"
 #include "migration/migration.h"
 #include "exec/address-spaces.h"
+#include "standard-headers/linux/virtio_ids.h"
 
 static void
 vhost_vdpa_device_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
@@ -201,7 +202,23 @@ static void
 vhost_vdpa_device_get_config(VirtIODevice *vdev, uint8_t *config)
 {
     VhostVdpaDevice *s = VHOST_VDPA_DEVICE(vdev);
+    uint8_t *new_config;
+    int ret;
+
+    if (s->vdev_id != VIRTIO_ID_BLOCK) {
+        goto out;
+    }
 
+    new_config = g_malloc0(s->config_size);
+    ret = vhost_dev_get_config(&s->dev, new_config, s->config_size, NULL);
+    if (ret < 0) {
+        error_report("vhost-vdpa-device: get config failed(%d)\n", ret);
+        goto free;
+    }
+    memcpy(s->config, new_config, s->config_size);
+free:
+    g_free(new_config);
+out:
     memcpy(config, s->config, s->config_size);
 }
 
-- 
2.43.0