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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 | |
39 | #define FIEMAP_MAX_OFFSET (~0ULL) |
40 | |
41 | #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */ |
42 | #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */ |
43 | |
44 | #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) |
45 | |
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 */ |
69 |
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