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__ */