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01: /*
02:  * FS_IOC_FIEMAP ioctl infrastructure.
03:  *
04:  * Some portions copyright (C) 2007 Cluster File Systems, Inc
05:  *
06:  * Authors: Mark Fasheh <mfasheh@suse.com>
07:  *          Kalpak Shah <kalpak.shah@sun.com>
08:  *          Andreas Dilger <adilger@sun.com>
09:  */
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: 
44: #define FIEMAP_FLAGS_COMPAT     (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
45: 
46: #define FIEMAP_EXTENT_LAST              0x00000001 /* Last extent in file. */
47: #define FIEMAP_EXTENT_UNKNOWN           0x00000002 /* Data location unknown. */
48: #define FIEMAP_EXTENT_DELALLOC          0x00000004 /* Location still pending.
49:                                                     * Sets EXTENT_UNKNOWN. */
50: #define FIEMAP_EXTENT_ENCODED           0x00000008 /* Data can not be read
51:                                                     * while fs is unmounted */
52: #define FIEMAP_EXTENT_DATA_ENCRYPTED    0x00000080 /* Data is encrypted by fs.
53:                                                     * Sets EXTENT_NO_BYPASS. */
54: #define FIEMAP_EXTENT_NOT_ALIGNED       0x00000100 /* Extent offsets may not be
55:                                                     * block aligned. */
56: #define FIEMAP_EXTENT_DATA_INLINE       0x00000200 /* Data mixed with metadata.
57:                                                     * Sets EXTENT_NOT_ALIGNED.*/
58: #define FIEMAP_EXTENT_DATA_TAIL         0x00000400 /* Multiple files in block.
59:                                                     * Sets EXTENT_NOT_ALIGNED.*/
60: #define FIEMAP_EXTENT_UNWRITTEN         0x00000800 /* Space allocated, but
61:                                                     * no data (i.e. zero). */
62: #define FIEMAP_EXTENT_MERGED            0x00001000 /* File does not natively
63:                                                     * support extents. Result
64:                                                     * merged for efficiency. */
65: #define FIEMAP_EXTENT_SHARED            0x00002000 /* Space shared with other
66:                                                     * files. */
67: 
68: #endif /* _LINUX_FIEMAP_H */
69: 

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