LXR linux/include/uapi/linux/fiemap.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2/*
   3 * FS_IOC_FIEMAP ioctl infrastructure.
   4 *
   5 * Some portions copyright (C) 2007 Cluster File Systems, Inc
   6 *
   7 * Authors: Mark Fasheh <mfasheh@suse.com>
   8 *          Kalpak Shah <kalpak.shah@sun.com>
   9 *          Andreas Dilger <adilger@sun.com>
  10 */
  11
  12#ifndef _UAPI_LINUX_FIEMAP_H
  13#define _UAPI_LINUX_FIEMAP_H
  14
  15#include <linux/types.h>
  16
  17struct fiemap_extent {
  18        __u64 fe_logical;  /* logical offset in bytes for the start of
  19                            * the extent from the beginning of the file */
  20        __u64 fe_physical; /* physical offset in bytes for the start
  21                            * of the extent from the beginning of the disk */
  22        __u64 fe_length;   /* length in bytes for this extent */
  23        __u64 fe_reserved64[2];
  24        __u32 fe_flags;    /* FIEMAP_EXTENT_* flags for this extent */
  25        __u32 fe_reserved[3];
  26};
  27
  28struct fiemap {
  29        __u64 fm_start;         /* logical offset (inclusive) at
  30                                 * which to start mapping (in) */
  31        __u64 fm_length;        /* logical length of mapping which
  32                                 * userspace wants (in) */
  33        __u32 fm_flags;         /* FIEMAP_FLAG_* flags for request (in/out) */
  34        __u32 fm_mapped_extents;/* number of extents that were mapped (out) */
  35        __u32 fm_extent_count;  /* size of fm_extents array (in) */
  36        __u32 fm_reserved;
  37        struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
  38};
  39
  40#define FIEMAP_MAX_OFFSET       (~0ULL)
  41
  42#define FIEMAP_FLAG_SYNC        0x00000001 /* sync file data before map */
  43#define FIEMAP_FLAG_XATTR       0x00000002 /* map extended attribute tree */
  44#define FIEMAP_FLAG_CACHE       0x00000004 /* request caching of the extents */
  45
  46#define FIEMAP_FLAGS_COMPAT     (FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR)
  47
  48#define FIEMAP_EXTENT_LAST              0x00000001 /* Last extent in file. */
  49#define FIEMAP_EXTENT_UNKNOWN           0x00000002 /* Data location unknown. */
  50#define FIEMAP_EXTENT_DELALLOC          0x00000004 /* Location still pending.
  51                                                    * Sets EXTENT_UNKNOWN. */
  52#define FIEMAP_EXTENT_ENCODED           0x00000008 /* Data can not be read
  53                                                    * while fs is unmounted */
  54#define FIEMAP_EXTENT_DATA_ENCRYPTED    0x00000080 /* Data is encrypted by fs.
  55                                                    * Sets EXTENT_NO_BYPASS. */
  56#define FIEMAP_EXTENT_NOT_ALIGNED       0x00000100 /* Extent offsets may not be
  57                                                    * block aligned. */
  58#define FIEMAP_EXTENT_DATA_INLINE       0x00000200 /* Data mixed with metadata.
  59                                                    * Sets EXTENT_NOT_ALIGNED.*/
  60#define FIEMAP_EXTENT_DATA_TAIL         0x00000400 /* Multiple files in block.
  61                                                    * Sets EXTENT_NOT_ALIGNED.*/
  62#define FIEMAP_EXTENT_UNWRITTEN         0x00000800 /* Space allocated, but
  63                                                    * no data (i.e. zero). */
  64#define FIEMAP_EXTENT_MERGED            0x00001000 /* File does not natively
  65                                                    * support extents. Result
  66                                                    * merged for efficiency. */
  67#define FIEMAP_EXTENT_SHARED            0x00002000 /* Space shared with other
  68                                                    * files. */
  69
  70#endif /* _UAPI_LINUX_FIEMAP_H */
  71