Edit: /usr/include/linux/falloc.h (293B)
#ifndef _FALLOC_H_
#define _FALLOC_H_
#define FALLOC_FL_KEEP_SIZE 0x01 /* default is extend size */
#define FALLOC_FL_PUNCH_HOLE 0x02 /* de-allocates range */
#define FALLOC_FL_CONVERT_AND_EXTEND 0x100 /* mark extents as initialized
* and extend i_size */
#endif /* _FALLOC_H_ */