2 * FS_IOC_FIEMAP ioctl infrastructure.
4 * Some portions copyright (C) 2007 Cluster File Systems, Inc
6 * Authors: Mark Fasheh <mfasheh@suse.com>
7 * Kalpak Shah <kalpak.shah@sun.com>
8 * Andreas Dilger <adilger@sun.com>
11 #ifndef _LINUX_FIEMAP_H
12 #define _LINUX_FIEMAP_H
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_device; /* device number (fs-specific if FIEMAP_EXTENT_NET)
23 * low 16bits are used */
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) */
36 #if __GNUC_PREREQ (4, 8)
37 #pragma GCC diagnostic push
38 #pragma GCC diagnostic ignored "-Wpedantic"
40 struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
41 #if __GNUC_PREREQ (4, 8)
42 #pragma GCC diagnostic pop
46 #if defined(__linux__) && !defined(FS_IOC_FIEMAP)
47 #define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
50 #if defined(__linux__) && !defined(FS_IOC_GETSTATE)
51 #define EXT4_IOC_GETSTATE _IOW('f', 41, __u32)
54 #if defined(__linux__) && !defined(EXT4_IOC_GET_ES_CACHE)
55 #define EXT4_IOC_GET_ES_CACHE _IOWR('f', 42, struct fiemap)
58 #if defined(__linux__) && !defined(EXT4_STATE_FLAG_EXT_PRECACHED)
59 #define EXT4_STATE_FLAG_EXT_PRECACHED 0x00000001
62 #define FIEMAP_MAX_OFFSET (~0ULL)
64 #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */
65 #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */
66 #define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */
67 #define FIEMAP_FLAG_DEVICE_ORDER 0x40000000 /* return device ordered mapping */
69 #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
71 #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */
72 #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */
73 #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending.
74 * Sets EXTENT_UNKNOWN. */
75 #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read
76 * while fs is unmounted */
77 #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs.
78 * Sets EXTENT_NO_BYPASS. */
79 #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be
81 #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata.
82 * Sets EXTENT_NOT_ALIGNED.*/
83 #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block.
84 * Sets EXTENT_NOT_ALIGNED.*/
85 #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but
86 * no data (i.e. zero). */
87 #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively
88 * support extents. Result
89 * merged for efficiency. */
90 #define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other
93 #define EXT4_FIEMAP_EXTENT_HOLE 0x08000000 /* Entry in extent status
95 /* Network filesystem flags - use a high bit, don't conflict with upstream */
96 #define FIEMAP_EXTENT_NET 0x80000000 /* Data stored remotely. */
98 #endif /* _LINUX_FIEMAP_H */