1/*
 2 * Copyright (C) 2016 Oracle.  All Rights Reserved.
 3 *
 4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
 5 *
 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.
10 *
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.
15 *
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.
19 */
20#ifndef __XFS_REFLINK_H
21#define __XFS_REFLINK_H 1
22
23extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
24		xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
25		xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
 
 
 
 
 
 
 
26extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
27		struct xfs_bmbt_irec *irec, bool *shared, bool *trimmed);
 
 
28
29extern int xfs_reflink_reserve_cow(struct xfs_inode *ip,
30		struct xfs_bmbt_irec *imap, bool *shared);
31extern int xfs_reflink_allocate_cow(struct xfs_inode *ip,
32		struct xfs_bmbt_irec *imap, bool *shared, uint *lockmode);
33extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
34		xfs_off_t count);
35extern bool xfs_reflink_find_cow_mapping(struct xfs_inode *ip, xfs_off_t offset,
36		struct xfs_bmbt_irec *imap);
37extern void xfs_reflink_trim_irec_to_next_cow(struct xfs_inode *ip,
38		xfs_fileoff_t offset_fsb, struct xfs_bmbt_irec *imap);
39
40extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
41		struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
42		xfs_fileoff_t end_fsb, bool cancel_real);
43extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
44		xfs_off_t count, bool cancel_real);
45extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
46		xfs_off_t count);
47extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
48extern int xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
49		struct file *file_out, loff_t pos_out, u64 len, bool is_dedupe);
 
50extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
51		struct xfs_inode *ip, bool *has_shared);
52extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
53		struct xfs_trans **tpp);
54extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
55		xfs_off_t len);
 
 
 
 
 
 
 
 
56
57#endif /* __XFS_REFLINK_H */

 1// SPDX-License-Identifier: GPL-2.0+
 2/*
 3 * Copyright (C) 2016 Oracle.  All Rights Reserved.
 
 4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 5 */
 6#ifndef __XFS_REFLINK_H
 7#define __XFS_REFLINK_H 1
 8
 9static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip)
10{
11	return ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount);
12}
13
14static inline bool xfs_is_cow_inode(struct xfs_inode *ip)
15{
16	return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
17}
18
19extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
20		struct xfs_bmbt_irec *irec, bool *shared);
21int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
22		bool *shared);
23
24int xfs_reflink_allocate_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
25		struct xfs_bmbt_irec *cmap, bool *shared, uint *lockmode,
26		bool convert_now);
 
27extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
28		xfs_off_t count);
 
 
 
 
29
30extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
31		struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
32		xfs_fileoff_t end_fsb, bool cancel_real);
33extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
34		xfs_off_t count, bool cancel_real);
35extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
36		xfs_off_t count);
37extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
38extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
39		struct file *file_out, loff_t pos_out, loff_t len,
40		unsigned int remap_flags);
41extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
42		struct xfs_inode *ip, bool *has_shared);
43extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
44		struct xfs_trans **tpp);
45extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
46		xfs_off_t len);
47extern int xfs_reflink_remap_prep(struct file *file_in, loff_t pos_in,
48		struct file *file_out, loff_t pos_out, loff_t *len,
49		unsigned int remap_flags);
50extern int xfs_reflink_remap_blocks(struct xfs_inode *src, loff_t pos_in,
51		struct xfs_inode *dest, loff_t pos_out, loff_t remap_len,
52		loff_t *remapped);
53extern int xfs_reflink_update_dest(struct xfs_inode *dest, xfs_off_t newlen,
54		xfs_extlen_t cowextsize, unsigned int remap_flags);
55
56#endif /* __XFS_REFLINK_H */