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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
9struct fsmap;
10
11/* internal fsmap representation */
12struct 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
21struct 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
30void xfs_fsmap_from_internal(struct fsmap *dest, struct xfs_fsmap *src);
31void xfs_fsmap_to_internal(struct xfs_fsmap *dest, struct fsmap *src);
32
33/* fsmap to userspace formatter - copy to user & advance pointer */
34typedef int (*xfs_fsmap_format_t)(struct xfs_fsmap *, void *);
35
36int 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__ */