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__ */
40