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
  11 /* internal fsmap representation */
  12 struct xfs_fsmap {
  13         dev_t           fmr_device;     /* device id */
  14         uint32_t        fmr_flags;      /* mapping flags */
  15         uint64_t        fmr_physical;   /* device offset of segment */
  16         uint64_t        fmr_owner;      /* owner id */
  17         xfs_fileoff_t   fmr_offset;     /* file offset of segment */
  18         xfs_filblks_t   fmr_length;     /* length of segment, blocks */
  19 };
  20
  21 struct xfs_fsmap_head {
  22         uint32_t        fmh_iflags;     /* control flags */
  23         uint32_t        fmh_oflags;     /* output flags */
  24         unsigned int    fmh_count;      /* # of entries in array incl. input */
  25         unsigned int    fmh_entries;    /* # of entries filled in (output). */
  26
  27         struct xfs_fsmap fmh_keys[2];   /* low and high keys */
  28 };
  29
  30 void xfs_fsmap_from_internal(struct fsmap *dest, struct xfs_fsmap *src);
  31 void xfs_fsmap_to_internal(struct xfs_fsmap *dest, struct fsmap *src);
  32
  33 /* fsmap to userspace formatter - copy to user & advance pointer */
  34 typedef int (*xfs_fsmap_format_t)(struct xfs_fsmap *, void *);
  35
  36 int xfs_getfsmap(struct xfs_mount *mp, struct xfs_fsmap_head *head,
  37                 xfs_fsmap_format_t formatter, void *arg);
  38
  39 #endif /* __XFS_FSMAP_H__ */