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#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 */
/*
* FALLOC_FL_COLLAPSE_RANGE is used to remove a range of a file
* without leaving a hole in the file. The contents of the file beyond
* the range being removed is appended to the start offset of the range
* being removed (i.e. the hole that was punched is "collapsed"),
* resulting in a file layout that looks like the range that was
* removed never existed. As such collapsing a range of a file changes
* the size of the file, reducing it by the same length of the range
* that has been removed by the operation.
*
* Different filesystems may implement different limitations on the
* granularity of the operation. Most will limit operations to
* filesystem block size boundaries, but this boundary may be larger or
* smaller depending on the filesystem and/or the configuration of the
* filesystem or file.
*
* Attempting to collapse a range that crosses the end of the file is
* considered an illegal operation - just use ftruncate(2) if you need
* to collapse a range that crosses EOF.
*/
#define FALLOC_FL_COLLAPSE_RANGE 0x08
#endif /* _UAPI_FALLOC_H_ */
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