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편집 파일: fiemap.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * FS_IOC_FIEMAP ioctl infrastructure. * * Some portions copyright (C) 2007 Cluster File Systems, Inc * * Authors: Mark Fasheh <mfasheh@suse.com> * Kalpak Shah <kalpak.shah@sun.com> * Andreas Dilger <adilger@sun.com> */ #ifndef _LINUX_FIEMAP_H #define _LINUX_FIEMAP_H #include <linux/types.h> struct fiemap_extent { __u64 fe_logical; /* logical offset in bytes for the start of * the extent from the beginning of the file */ __u64 fe_physical; /* physical offset in bytes for the start * of the extent from the beginning of the disk */ __u64 fe_length; /* length in bytes for this extent */ __u64 fe_reserved64[2]; __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ __u32 fe_reserved[3]; }; struct fiemap { __u64 fm_start; /* logical offset (inclusive) at * which to start mapping (in) */ __u64 fm_length; /* logical length of mapping which * userspace wants (in) */ __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ __u32 fm_mapped_extents;/* number of extents that were mapped (out) */ __u32 fm_extent_count; /* size of fm_extents array (in) */ __u32 fm_reserved; struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */ }; #define FIEMAP_MAX_OFFSET (~0ULL) #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) #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 /* _LINUX_FIEMAP_H */