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
xfs_is_always_cow_inode(struct xfs_inode * ip)9 static 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
xfs_is_cow_inode(struct xfs_inode * ip)14 static 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
19 extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
20 xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
21 xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
22 extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
23 struct xfs_bmbt_irec *irec, bool *shared);
24 int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
25 bool *shared);
26
27 int xfs_reflink_allocate_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
28 struct xfs_bmbt_irec *cmap, bool *shared, uint *lockmode,
29 bool convert_now);
30 extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
31 xfs_off_t count);
32
33 extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
34 struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
35 xfs_fileoff_t end_fsb, bool cancel_real);
36 extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
37 xfs_off_t count, bool cancel_real);
38 extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
39 xfs_off_t count);
40 extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
41 extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
42 struct file *file_out, loff_t pos_out, loff_t len,
43 unsigned int remap_flags);
44 extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
45 struct xfs_inode *ip, bool *has_shared);
46 extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
47 struct xfs_trans **tpp);
48 extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
49 xfs_off_t len);
50 extern int xfs_reflink_remap_prep(struct file *file_in, loff_t pos_in,
51 struct file *file_out, loff_t pos_out, loff_t *len,
52 unsigned int remap_flags);
53 extern int xfs_reflink_remap_blocks(struct xfs_inode *src, loff_t pos_in,
54 struct xfs_inode *dest, loff_t pos_out, loff_t remap_len,
55 loff_t *remapped);
56 extern int xfs_reflink_update_dest(struct xfs_inode *dest, xfs_off_t newlen,
57 xfs_extlen_t cowextsize, unsigned int remap_flags);
58
59 #endif /* __XFS_REFLINK_H */
60