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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/uapi/linux/fiemap.h
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 #include <linux/types.h>
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 */
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 struct fiemap_extent fm_extents
[0]; /* array of mapped extents (out) */
39 #define FIEMAP_MAX_OFFSET (~0ULL)
41 #define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */
42 #define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */
43 #define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */
45 #define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
47 #define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */
48 #define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */
49 #define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending.
50 * Sets EXTENT_UNKNOWN. */
51 #define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read
52 * while fs is unmounted */
53 #define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs.
54 * Sets EXTENT_NO_BYPASS. */
55 #define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be
57 #define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata.
58 * Sets EXTENT_NOT_ALIGNED.*/
59 #define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block.
60 * Sets EXTENT_NOT_ALIGNED.*/
61 #define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but
62 * no data (i.e. zero). */
63 #define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively
64 * support extents. Result
65 * merged for efficiency. */
66 #define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other
69 #endif /* _LINUX_FIEMAP_H */