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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2/*3 * FS_IOC_FIEMAP ioctl infrastructure.4 *5 * Some portions copyright (C) 2007 Cluster File Systems, Inc6 *7 * Authors: Mark Fasheh <mfasheh@suse.com>8 * Kalpak Shah <kalpak.shah@sun.com>9 * Andreas Dilger <adilger@sun.com>10 */11 12#ifndef _UAPI_LINUX_FIEMAP_H13#define _UAPI_LINUX_FIEMAP_H14 15#include <linux/types.h>16 17struct fiemap_extent {18 __u64 fe_logical; /* logical offset in bytes for the start of19 * the extent from the beginning of the file */20 __u64 fe_physical; /* physical offset in bytes for the start21 * of the extent from the beginning of the disk */22 __u64 fe_length; /* length in bytes for this extent */23 __u64 fe_reserved64[2];24 __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */25 __u32 fe_reserved[3];26};27 28struct fiemap {29 __u64 fm_start; /* logical offset (inclusive) at30 * which to start mapping (in) */31 __u64 fm_length; /* logical length of mapping which32 * userspace wants (in) */33 __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */34 __u32 fm_mapped_extents;/* number of extents that were mapped (out) */35 __u32 fm_extent_count; /* size of fm_extents array (in) */36 __u32 fm_reserved;37 struct fiemap_extent fm_extents[]; /* array of mapped extents (out) */38};39 40#define FIEMAP_MAX_OFFSET (~0ULL)41 42#define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */43#define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */44#define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */45 46#define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)47 48#define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */49#define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */50#define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending.51 * Sets EXTENT_UNKNOWN. */52#define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read53 * while fs is unmounted */54#define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs.55 * Sets EXTENT_NO_BYPASS. */56#define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be57 * block aligned. */58#define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata.59 * Sets EXTENT_NOT_ALIGNED.*/60#define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block.61 * Sets EXTENT_NOT_ALIGNED.*/62#define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but63 * no data (i.e. zero). */64#define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively65 * support extents. Result66 * merged for efficiency. */67#define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other68 * files. */69 70#endif /* _UAPI_LINUX_FIEMAP_H */71