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 #if __GNUC_PREREQ (4, 8) 35 #pragma GCC diagnostic push 36 #pragma GCC diagnostic ignored "-Wpedantic" 37 #endif 38 struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */ 39 #if __GNUC_PREREQ (4, 8) 40 #pragma GCC diagnostic pop 41 #endif 42 }; 43 44 #if defined(__linux__) && !defined(FS_IOC_FIEMAP) 45 #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap) 46 #endif 47 48 #define FIEMAP_MAX_OFFSET (~0ULL) 49 50 #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */ 51 #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */ 52 53 #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) 54 55 #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ 56 #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ 57 #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. 58 * Sets EXTENT_UNKNOWN. */ 59 #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read 60 * while fs is unmounted */ 61 #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. 62 * Sets EXTENT_NO_BYPASS. */ 63 #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be 64 * block aligned. */ 65 #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. 66 * Sets EXTENT_NOT_ALIGNED.*/ 67 #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. 68 * Sets EXTENT_NOT_ALIGNED.*/ 69 #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but 70 * no data (i.e. zero). */ 71 #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively 72 * support extents. Result 73 * merged for efficiency. */ 74 #define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other 75 * files. */ 76 77 #endif /* _LINUX_FIEMAP_H */ 78