1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 /* 3 * FS_IOC_FIEMAP ioctl infrastructure. 4 * 5 * Some portions copyright (C) 2007 Cluster File Systems, Inc 6 * 7 * Authors: Mark Fasheh <mfasheh@suse.com> 8 * Kalpak Shah <kalpak.shah@sun.com> 9 * Andreas Dilger <adilger@sun.com> 10 */ 11 12 #ifndef _LINUX_FIEMAP_H 13 #define _LINUX_FIEMAP_H 14 15 #include <linux/types.h> 16 17 struct fiemap_extent { 18 __u64 fe_logical; /* logical offset in bytes for the start of 19 * the extent from the beginning of the file */ 20 __u64 fe_physical; /* physical offset in bytes for the start 21 * of the extent from the beginning of the disk */ 22 __u64 fe_length; /* length in bytes for this extent */ 23 __u64 fe_reserved64[2]; 24 __u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */ 25 __u32 fe_reserved[3]; 26 }; 27 28 struct fiemap { 29 __u64 fm_start; /* logical offset (inclusive) at 30 * which to start mapping (in) */ 31 __u64 fm_length; /* logical length of mapping which 32 * userspace wants (in) */ 33 __u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */ 34 __u32 fm_mapped_extents;/* number of extents that were mapped (out) */ 35 __u32 fm_extent_count; /* size of fm_extents array (in) */ 36 __u32 fm_reserved; 37 struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */ 38 }; 39 40 #define FIEMAP_MAX_OFFSET (~0ULL) 41 42 #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */ 43 #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */ 44 #define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */ 45 46 #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR) 47 48 #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */ 49 #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */ 50 #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending. 51 * Sets EXTENT_UNKNOWN. */ 52 #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read 53 * while fs is unmounted */ 54 #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs. 55 * Sets EXTENT_NO_BYPASS. */ 56 #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be 57 * block aligned. */ 58 #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata. 59 * Sets EXTENT_NOT_ALIGNED.*/ 60 #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block. 61 * Sets EXTENT_NOT_ALIGNED.*/ 62 #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but 63 * no data (i.e. zero). */ 64 #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively 65 * support extents. Result 66 * merged for efficiency. */ 67 #define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other 68 * files. */ 69 70 #endif /* _LINUX_FIEMAP_H */ 71