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