[Qemu-devel] [PATCH] virtio-blk: Set default serial id

[Asias He]

If user does not specify a serial id, e.g.

   -device virtio-blk-pci,serial="serial_id"
or
   -drive serial="serial_id"

no serial id will be assigned.

Add a default serial id in this case to help identifying
the disk in guest.

Signed-off-by: Asias He <address@hidden>
---
 hw/virtio-blk.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index f2143fd..c016817 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -642,6 +642,13 @@ static int virtio_blk_device_init(VirtIODevice *vdev)
     }
 
     blkconf_serial(&blk->conf, &blk->serial);
+
+    if (!blk->serial) {
+        char serial[VIRTIO_BLK_ID_BYTES];
+        snprintf(serial, VIRTIO_BLK_ID_BYTES, "ID%05d", virtio_blk_id);
+        blk->serial = g_strdup(serial);
+    }
+
     if (blkconf_geometry(&blk->conf, NULL, 65535, 255, 255) < 0) {
         return -1;
     }
-- 
1.8.1.4