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  
17  struct 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  
28  struct 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