char_device.c: add ref count for write-to-device buffers

The ref count is used in order to keep buffers that were in the write
queue and now are part of migration data, in case the char_device state
is destroyed before we complete sending the migration data.

1 files changed, 1 insertions, 0 deletions

diff --git a/server/char_device.h b/server/char_device.h
index d6d75e31..8bfe4ec6 100644
--- a/server/char_device.h
+++ b/server/char_device.h
@@ -73,6 +73,7 @@ typedef struct SpiceCharDeviceWriteBuffer {
     uint32_t buf_size;
     uint32_t buf_used;
     uint32_t token_price;
+    uint32_t refs;
 } SpiceCharDeviceWriteBuffer;
 
 typedef void SpiceCharDeviceMsgToClient;