| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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__ */ |