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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#ifndef _UAPI_LINUX_FIEMAP_H#define _UAPI_LINUX_FIEMAP_H
#include <linux/types.h>
/** * struct fiemap_extent - description of one fiemap extent * @fe_logical: byte offset of the extent in the file * @fe_physical: byte offset of extent on disk * @fe_length: length in bytes for this extent * @fe_flags: FIEMAP_EXTENT_* flags for this extent */struct fiemap_extent { __u64 fe_logical; __u64 fe_physical; __u64 fe_length; /* private: */ __u64 fe_reserved64[2]; /* public: */ __u32 fe_flags; /* private: */ __u32 fe_reserved[3];};
/** * struct fiemap - file extent mappings * @fm_start: byte offset (inclusive) at which to start mapping (in) * @fm_length: logical length of mapping which userspace wants (in) * @fm_flags: FIEMAP_FLAG_* flags for request (in/out) * @fm_mapped_extents: number of extents that were mapped (out) * @fm_extent_count: size of fm_extents array (in) * @fm_extents: array of mapped extents (out) */struct fiemap { __u64 fm_start; __u64 fm_length; __u32 fm_flags; __u32 fm_mapped_extents; __u32 fm_extent_count; /* private: */ __u32 fm_reserved; /* public: */ struct fiemap_extent fm_extents[];};
#define FIEMAP_MAX_OFFSET (~0ULL)
/* flags used in fm_flags: */#define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */#define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */#define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */
#define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
/* flags used in fe_flags: */#define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */#define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */#define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. * Sets EXTENT_UNKNOWN. */#define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read * while fs is unmounted */#define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. * Sets EXTENT_NO_BYPASS. */#define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be * block aligned. */#define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. * Sets EXTENT_NOT_ALIGNED.*/#define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. * Sets EXTENT_NOT_ALIGNED.*/#define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but * no data (i.e. zero). */#define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively * support extents. Result * merged for efficiency. */#define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other * files. */
#endif /* _UAPI_LINUX_FIEMAP_H */