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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: #define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */ 44: 45: #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) 46: 47: #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ 48: #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ 49: #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. 50: * Sets EXTENT_UNKNOWN. */ 51: #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read 52: * while fs is unmounted */ 53: #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. 54: * Sets EXTENT_NO_BYPASS. */ 55: #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be 56: * block aligned. */ 57: #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. 58: * Sets EXTENT_NOT_ALIGNED.*/ 59: #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. 60: * Sets EXTENT_NOT_ALIGNED.*/ 61: #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but 62: * no data (i.e. zero). */ 63: #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively 64: * support extents. Result 65: * merged for efficiency. */ 66: #define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other 67: * files. */ 68: 69: #endif /* _LINUX_FIEMAP_H */ 70: