fallocalte with the FALLOC_FL_ZERO_RANGE flag introduced
with Linux 3.15 should be able to do this soon
Signed-off-by: Bjoern Jacke <bj@sernet.de>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
#define FSCTL_DELETE_REPARSE_POINT (FSCTL_FILESYSTEM | FSCTL_ACCESS_ANY | 0x00AC | FSCTL_METHOD_BUFFERED)
#define FSCTL_CREATE_OR_GET_OBJECT_ID (FSCTL_FILESYSTEM | FSCTL_ACCESS_ANY | 0x00C0 | FSCTL_METHOD_BUFFERED)
#define FSCTL_SET_SPARSE (FSCTL_FILESYSTEM | FSCTL_ACCESS_ANY | 0x00C4 | FSCTL_METHOD_BUFFERED)
+#define FSCTL_SET_ZERO_DATA (FSCTL_FILESYSTEM | FSCTL_ACCESS_WRITE | 0x00C8 | FSCTL_METHOD_BUFFERED)
#define FSCTL_QUERY_ALLOCATED_RANGES (FSCTL_FILESYSTEM | FSCTL_ACCESS_READ | 0x00CC | FSCTL_METHOD_NEITHER)
#define FSCTL_FILE_LEVEL_TRIM (FSCTL_FILESYSTEM | FSCTL_ACCESS_WRITE | 0x0208 | FSCTL_METHOD_BUFFERED)
#define FSCTL_OFFLOAD_READ (FSCTL_FILESYSTEM | FSCTL_ACCESS_READ | 0x0264 | FSCTL_METHOD_BUFFERED)