2 * Copyright (C) 2016 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it would be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
20 #ifndef __XFS_REFLINK_H
21 #define __XFS_REFLINK_H 1
23 extern int xfs_reflink_find_shared(struct xfs_mount
*mp
, xfs_agnumber_t agno
,
24 xfs_agblock_t agbno
, xfs_extlen_t aglen
, xfs_agblock_t
*fbno
,
25 xfs_extlen_t
*flen
, bool find_maximal
);
26 extern int xfs_reflink_trim_around_shared(struct xfs_inode
*ip
,
27 struct xfs_bmbt_irec
*irec
, bool *shared
, bool *trimmed
);
29 extern int xfs_reflink_reserve_cow_range(struct xfs_inode
*ip
,
30 xfs_off_t offset
, xfs_off_t count
);
31 extern int xfs_reflink_allocate_cow_range(struct xfs_inode
*ip
,
32 xfs_off_t offset
, xfs_off_t count
);
33 extern bool xfs_reflink_find_cow_mapping(struct xfs_inode
*ip
, xfs_off_t offset
,
34 struct xfs_bmbt_irec
*imap
, bool *need_alloc
);
35 extern int xfs_reflink_trim_irec_to_next_cow(struct xfs_inode
*ip
,
36 xfs_fileoff_t offset_fsb
, struct xfs_bmbt_irec
*imap
);
38 extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode
*ip
,
39 struct xfs_trans
**tpp
, xfs_fileoff_t offset_fsb
,
40 xfs_fileoff_t end_fsb
);
41 extern int xfs_reflink_cancel_cow_range(struct xfs_inode
*ip
, xfs_off_t offset
,
43 extern int xfs_reflink_end_cow(struct xfs_inode
*ip
, xfs_off_t offset
,
45 extern int xfs_reflink_recover_cow(struct xfs_mount
*mp
);
46 #define XFS_REFLINK_DEDUPE 1 /* only reflink if contents match */
47 #define XFS_REFLINK_ALL (XFS_REFLINK_DEDUPE)
48 extern int xfs_reflink_remap_range(struct xfs_inode
*src
, xfs_off_t srcoff
,
49 struct xfs_inode
*dest
, xfs_off_t destoff
, xfs_off_t len
,
51 extern int xfs_reflink_clear_inode_flag(struct xfs_inode
*ip
,
52 struct xfs_trans
**tpp
);
53 extern int xfs_reflink_unshare(struct xfs_inode
*ip
, xfs_off_t offset
,
56 extern bool xfs_reflink_has_real_cow_blocks(struct xfs_inode
*ip
);
58 #endif /* __XFS_REFLINK_H */