Line data Source code
1 : /*
2 : * FS_IOC_FIEMAP ioctl infrastructure.
3 : *
4 : * Some portions copyright (C) 2007 Cluster File Systems, Inc
5 : *
6 : * Authors: Mark Fasheh <mfasheh@suse.com>
7 : * Kalpak Shah <kalpak.shah@sun.com>
8 : * Andreas Dilger <adilger@sun.com>
9 : */
10 :
11 : #ifndef _LINUX_FIEMAP_H
12 : #define _LINUX_FIEMAP_H
13 :
14 : #include <linux/types.h>
15 :
16 : struct fiemap_extent {
17 : __u64 fe_logical; /* logical offset in bytes for the start of
18 : * the extent from the beginning of the file */
19 : __u64 fe_physical; /* physical offset in bytes for the start
20 : * of the extent from the beginning of the disk */
21 : __u64 fe_length; /* length in bytes for this extent */
22 : __u64 fe_reserved64[2];
23 : __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */
24 : __u32 fe_reserved[3];
25 : };
26 :
27 : struct fiemap {
28 : __u64 fm_start; /* logical offset (inclusive) at
29 : * which to start mapping (in) */
30 : __u64 fm_length; /* logical length of mapping which
31 : * userspace wants (in) */
32 : __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */
33 : __u32 fm_mapped_extents;/* number of extents that were mapped (out) */
34 : __u32 fm_extent_count; /* size of fm_extents array (in) */
35 : __u32 fm_reserved;
36 : struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
37 : };
38 1 :
39 1 : #define FIEMAP_MAX_OFFSET (~0ULL)
40 1 :
41 1 : #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */
42 1 : #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */
43 1 :
44 1 : #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
45 1 :
46 : #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */
47 : #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */
48 : #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending.
49 : * Sets EXTENT_UNKNOWN. */
50 : #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read
51 : * while fs is unmounted */
52 : #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs.
53 : * Sets EXTENT_NO_BYPASS. */
54 : #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be
55 : * block aligned. */
56 : #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata.
57 : * Sets EXTENT_NOT_ALIGNED.*/
58 : #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block.
59 : * Sets EXTENT_NOT_ALIGNED.*/
60 : #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but
61 : * no data (i.e. zero). */
62 : #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively
63 : * support extents. Result
64 : * merged for efficiency. */
65 : #define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other
66 : * files. */
67 :
68 : #endif /* _LINUX_FIEMAP_H */
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