| Mark Fasheh | c4b929b | 2008-10-08 19:44:18 -0400 | [diff] [blame] | 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 | struct fiemap_extent { |
| 15 | __u64 fe_logical; /* logical offset in bytes for the start of |
| 16 | * the extent from the beginning of the file */ |
| 17 | __u64 fe_physical; /* physical offset in bytes for the start |
| 18 | * of the extent from the beginning of the disk */ |
| 19 | __u64 fe_length; /* length in bytes for this extent */ |
| 20 | __u64 fe_reserved64[2]; |
| 21 | __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ |
| 22 | __u32 fe_reserved[3]; |
| 23 | }; |
| 24 | |
| 25 | struct fiemap { |
| 26 | __u64 fm_start; /* logical offset (inclusive) at |
| 27 | * which to start mapping (in) */ |
| 28 | __u64 fm_length; /* logical length of mapping which |
| 29 | * userspace wants (in) */ |
| 30 | __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ |
| 31 | __u32 fm_mapped_extents;/* number of extents that were mapped (out) */ |
| 32 | __u32 fm_extent_count; /* size of fm_extents array (in) */ |
| 33 | __u32 fm_reserved; |
| 34 | struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */ |
| 35 | }; |
| 36 | |
| 37 | #define FIEMAP_MAX_OFFSET (~0ULL) |
| 38 | |
| 39 | #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */ |
| 40 | #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */ |
| 41 | |
| 42 | #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) |
| 43 | |
| 44 | #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ |
| 45 | #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ |
| 46 | #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. |
| 47 | * Sets EXTENT_UNKNOWN. */ |
| 48 | #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read |
| 49 | * while fs is unmounted */ |
| 50 | #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. |
| 51 | * Sets EXTENT_NO_BYPASS. */ |
| 52 | #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be |
| 53 | * block aligned. */ |
| 54 | #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. |
| 55 | * Sets EXTENT_NOT_ALIGNED.*/ |
| 56 | #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. |
| 57 | * Sets EXTENT_NOT_ALIGNED.*/ |
| 58 | #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but |
| 59 | * no data (i.e. zero). */ |
| 60 | #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively |
| 61 | * support extents. Result |
| 62 | * merged for efficiency. */ |
| 63 | |
| 64 | #endif /* _LINUX_FIEMAP_H */ |