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, Inc
6 *
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_H
13#define _UAPI_LINUX_FIEMAP_H
14
15#include <linux/types.h>
16
17struct fiemap_extent {
18	__u64 fe_logical;  /* logical offset in bytes for the start of
19			    * the extent from the beginning of the file */
20	__u64 fe_physical; /* physical offset in bytes for the start
21			    * 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) at
30				 * which to start mapping (in) */
31	__u64 fm_length;	/* logical length of mapping which
32				 * 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 read
53						    * 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 be
57						    * 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, but
63						    * no data (i.e. zero). */
64#define FIEMAP_EXTENT_MERGED		0x00001000 /* File does not natively
65						    * support extents. Result
66						    * merged for efficiency. */
67#define FIEMAP_EXTENT_SHARED		0x00002000 /* Space shared with other
68						    * files. */
69
70#endif /* _UAPI_LINUX_FIEMAP_H */
71