smb_snapshot_array
#define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
struct smb_snapshot_array snapshot_in;
sizeof(struct smb_snapshot_array))) {
ret_data_len = sizeof(struct smb_snapshot_array);
sizeof(struct smb_snapshot_array)))
sizeof(struct smb_snapshot_array);