| /* 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 _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 */ |
