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 &&
12 xfs_sb_version_hasreflink(&ip->i_mount->m_sb);
13 }
14
xfs_is_cow_inode(struct xfs_inode * ip)15 static inline bool xfs_is_cow_inode(struct xfs_inode *ip)
16 {
17 return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
18 }
19
20 extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
21 xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
22 xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
23 extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
24 struct xfs_bmbt_irec *irec, bool *shared);
25 bool xfs_inode_need_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
26 bool *shared);
27
28 extern int xfs_reflink_allocate_cow(struct xfs_inode *ip,
29 struct xfs_bmbt_irec *imap, bool *shared, uint *lockmode,
30 bool convert_now);
31 extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
32 xfs_off_t count);
33
34 extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
35 struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
36 xfs_fileoff_t end_fsb, bool cancel_real);
37 extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
38 xfs_off_t count, bool cancel_real);
39 extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
40 xfs_off_t count);
41 extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
42 extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
43 struct file *file_out, loff_t pos_out, loff_t len,
44 unsigned int remap_flags);
45 extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
46 struct xfs_inode *ip, bool *has_shared);
47 extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
48 struct xfs_trans **tpp);
49 extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
50 xfs_off_t len);
51 extern int xfs_reflink_remap_prep(struct file *file_in, loff_t pos_in,
52 struct file *file_out, loff_t pos_out, loff_t *len,
53 unsigned int remap_flags);
54 extern int xfs_reflink_remap_blocks(struct xfs_inode *src, loff_t pos_in,
55 struct xfs_inode *dest, loff_t pos_out, loff_t remap_len,
56 loff_t *remapped);
57 extern int xfs_reflink_update_dest(struct xfs_inode *dest, xfs_off_t newlen,
58 xfs_extlen_t cowextsize, unsigned int remap_flags);
59 extern void xfs_reflink_remap_unlock(struct file *file_in,
60 struct file *file_out);
61
62 #endif /* __XFS_REFLINK_H */
63