1 files changed, 13 insertions, 0 deletions
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 14b6b65a5f..bf4f75dcde 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -642,6 +642,19 @@ static inline void qemu_reset_optind(void)
 }
 
 /**
+ * Sync changes made to the memory mapped file back to the backing
+ * storage. For POSIX compliant systems this will fallback
+ * to regular msync call. Otherwise it will trigger whole file sync
+ * (including the metadata case there is no support to skip that otherwise)
+ *
+ * @addr   - start of the memory area to be synced
+ * @length - length of the are to be synced
+ * @fd     - file descriptor for the file to be synced
+ *           (mandatory only for POSIX non-compliant systems)
+ */
+int qemu_msync(void *addr, size_t length, int fd);
+
+/**
  * qemu_get_host_name:
  * @errp: Error object
  *