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[0]; /* 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