blob: 671decbd2aeb9534256089502f343a375e70f03e [file] [log] [blame]
Mark Fashehc4b929b2008-10-08 19:44:18 -04001/*
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
14struct 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
25struct 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 */