1. 根目录:
2. include
3. uapi
4. linux
5. falloc.h

#ifndef _UAPI_FALLOC_H_
#define _UAPI_FALLOC_H_

#define FALLOC_FL_KEEP_SIZE	0x01 /* default is extend size */
#define FALLOC_FL_PUNCH_HOLE	0x02 /* de-allocates range */
#define FALLOC_FL_NO_HIDE_STALE	0x04 /* reserved codepoint */


#endif /* _UAPI_FALLOC_H_ */