ram compress: Assert that the file buffer matches the result

Before this series, "nothing to send" was handled by the file buffer
being empty. Now it is tracked via param->result.

Assert that the file buffer state matches the result.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/migration/qemu-file.c b/migration/qemu-file.c
index f4cfd05c67..61fb580342 100644
--- a/migration/qemu-file.c
+++ b/migration/qemu-file.c
@@ -871,6 +871,17 @@ int qemu_put_qemu_file(QEMUFile *f_des, QEMUFile *f_src)
 }
 
 /*
+ * Check if the writable buffer is empty
+ */
+
+bool qemu_file_buffer_empty(QEMUFile *file)
+{
+    assert(qemu_file_is_writable(file));
+
+    return !file->iovcnt;
+}
+
+/*
  * Get a string whose length is determined by a single preceding byte
  * A preallocated 256 byte buffer must be passed in.
  * Returns: len on success and a 0 terminated string in the buffer