71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/*
|
|
* FS_IOC_FIEMAP ioctl infrastructure.
|
|
*
|
|
* Some portions copyright (C) 2007 Cluster File Systems, Inc
|
|
*
|
|
* Authors: Mark Fasheh <mfasheh@suse.com>
|
|
* Kalpak Shah <kalpak.shah@sun.com>
|
|
* Andreas Dilger <adilger@sun.com>
|
|
*/
|
|
|
|
#ifndef _UAPI_LINUX_FIEMAP_H
|
|
#define _UAPI_LINUX_FIEMAP_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct fiemap_extent {
|
|
__u64 fe_logical; /* logical offset in bytes for the start of
|
|
* the extent from the beginning of the file */
|
|
__u64 fe_physical; /* physical offset in bytes for the start
|
|
* of the extent from the beginning of the disk */
|
|
__u64 fe_length; /* length in bytes for this extent */
|
|
__u64 fe_reserved64[2];
|
|
__u32 fe_flags; /* FIEMAP_EXTENT_* flags for this extent */
|
|
__u32 fe_reserved[3];
|
|
};
|
|
|
|
struct fiemap {
|
|
__u64 fm_start; /* logical offset (inclusive) at
|
|
* which to start mapping (in) */
|
|
__u64 fm_length; /* logical length of mapping which
|
|
* userspace wants (in) */
|
|
__u32 fm_flags; /* FIEMAP_FLAG_* flags for request (in/out) */
|
|
__u32 fm_mapped_extents;/* number of extents that were mapped (out) */
|
|
__u32 fm_extent_count; /* size of fm_extents array (in) */
|
|
__u32 fm_reserved;
|
|
struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
|
|
};
|
|
|
|
#define FIEMAP_MAX_OFFSET (~0ULL)
|
|
|
|
#define FIEMAP_FLAG_SYNC 0x00000001 /* sync file data before map */
|
|
#define FIEMAP_FLAG_XATTR 0x00000002 /* map extended attribute tree */
|
|
#define FIEMAP_FLAG_CACHE 0x00000004 /* request caching of the extents */
|
|
|
|
#define FIEMAP_FLAGS_COMPAT (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
|
|
|
|
#define FIEMAP_EXTENT_LAST 0x00000001 /* Last extent in file. */
|
|
#define FIEMAP_EXTENT_UNKNOWN 0x00000002 /* Data location unknown. */
|
|
#define FIEMAP_EXTENT_DELALLOC 0x00000004 /* Location still pending.
|
|
* Sets EXTENT_UNKNOWN. */
|
|
#define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read
|
|
* while fs is unmounted */
|
|
#define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs.
|
|
* Sets EXTENT_NO_BYPASS. */
|
|
#define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be
|
|
* block aligned. */
|
|
#define FIEMAP_EXTENT_DATA_INLINE 0x00000200 /* Data mixed with metadata.
|
|
* Sets EXTENT_NOT_ALIGNED.*/
|
|
#define FIEMAP_EXTENT_DATA_TAIL 0x00000400 /* Multiple files in block.
|
|
* Sets EXTENT_NOT_ALIGNED.*/
|
|
#define FIEMAP_EXTENT_UNWRITTEN 0x00000800 /* Space allocated, but
|
|
* no data (i.e. zero). */
|
|
#define FIEMAP_EXTENT_MERGED 0x00001000 /* File does not natively
|
|
* support extents. Result
|
|
* merged for efficiency. */
|
|
#define FIEMAP_EXTENT_SHARED 0x00002000 /* Space shared with other
|
|
* files. */
|
|
|
|
#endif /* _UAPI_LINUX_FIEMAP_H */
|