fs/xfs/xfs_fsmap.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Oracle.  All Rights Reserved.
   4  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5  */
   6 #ifndef __XFS_FSMAP_H__
   7 #define __XFS_FSMAP_H__
   8
   9 struct fsmap;
  10 struct fsmap_head;
  11
  12 /* internal fsmap representation */
  13 struct xfs_fsmap {
  14         dev_t           fmr_device;     /* device id */
  15         uint32_t        fmr_flags;      /* mapping flags */
  16         uint64_t        fmr_physical;   /* device offset of segment */
  17         uint64_t        fmr_owner;      /* owner id */
  18         xfs_fileoff_t   fmr_offset;     /* file offset of segment */
  19         xfs_filblks_t   fmr_length;     /* length of segment, blocks */
  20 };
  21
  22 struct xfs_fsmap_head {
  23         uint32_t        fmh_iflags;     /* control flags */
  24         uint32_t        fmh_oflags;     /* output flags */
  25         unsigned int    fmh_count;      /* # of entries in array incl. input */
  26         unsigned int    fmh_entries;    /* # of entries filled in (output). */
  27
  28         struct xfs_fsmap fmh_keys[2];   /* low and high keys */
  29 };
  30
  31 /* internal fsmap record format */
  32 struct xfs_fsmap_irec {
  33         xfs_daddr_t     start_daddr;
  34         xfs_daddr_t     len_daddr;
  35         uint64_t        owner;          /* extent owner */
  36         uint64_t        offset;         /* offset within the owner */
  37         unsigned int    rm_flags;       /* rmap state flags */
  38
  39         /*
  40          * rmapbt startblock corresponding to start_daddr, if the record came
  41          * from an rmap btree.
  42          */
  43         xfs_agblock_t   rec_key;
  44 };
  45
  46 int xfs_ioc_getfsmap(struct xfs_inode *ip, struct fsmap_head __user *arg);
  47
  48 #endif /* __XFS_FSMAP_H__ */