1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2016 Oracle. All Rights Reserved.
4*4882a593Smuzhiyun * Author: Darrick J. Wong <darrick.wong@oracle.com>
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun #ifndef __XFS_REFLINK_H
7*4882a593Smuzhiyun #define __XFS_REFLINK_H 1
8*4882a593Smuzhiyun
xfs_is_always_cow_inode(struct xfs_inode * ip)9*4882a593Smuzhiyun static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip)
10*4882a593Smuzhiyun {
11*4882a593Smuzhiyun return ip->i_mount->m_always_cow &&
12*4882a593Smuzhiyun xfs_sb_version_hasreflink(&ip->i_mount->m_sb);
13*4882a593Smuzhiyun }
14*4882a593Smuzhiyun
xfs_is_cow_inode(struct xfs_inode * ip)15*4882a593Smuzhiyun static inline bool xfs_is_cow_inode(struct xfs_inode *ip)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
21*4882a593Smuzhiyun xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
22*4882a593Smuzhiyun xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
23*4882a593Smuzhiyun extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
24*4882a593Smuzhiyun struct xfs_bmbt_irec *irec, bool *shared);
25*4882a593Smuzhiyun int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
26*4882a593Smuzhiyun bool *shared);
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun int xfs_reflink_allocate_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
29*4882a593Smuzhiyun struct xfs_bmbt_irec *cmap, bool *shared, uint *lockmode,
30*4882a593Smuzhiyun bool convert_now);
31*4882a593Smuzhiyun extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
32*4882a593Smuzhiyun xfs_off_t count);
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
35*4882a593Smuzhiyun struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
36*4882a593Smuzhiyun xfs_fileoff_t end_fsb, bool cancel_real);
37*4882a593Smuzhiyun extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
38*4882a593Smuzhiyun xfs_off_t count, bool cancel_real);
39*4882a593Smuzhiyun extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
40*4882a593Smuzhiyun xfs_off_t count);
41*4882a593Smuzhiyun extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
42*4882a593Smuzhiyun extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
43*4882a593Smuzhiyun struct file *file_out, loff_t pos_out, loff_t len,
44*4882a593Smuzhiyun unsigned int remap_flags);
45*4882a593Smuzhiyun extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
46*4882a593Smuzhiyun struct xfs_inode *ip, bool *has_shared);
47*4882a593Smuzhiyun extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
48*4882a593Smuzhiyun struct xfs_trans **tpp);
49*4882a593Smuzhiyun extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
50*4882a593Smuzhiyun xfs_off_t len);
51*4882a593Smuzhiyun extern int xfs_reflink_remap_prep(struct file *file_in, loff_t pos_in,
52*4882a593Smuzhiyun struct file *file_out, loff_t pos_out, loff_t *len,
53*4882a593Smuzhiyun unsigned int remap_flags);
54*4882a593Smuzhiyun extern int xfs_reflink_remap_blocks(struct xfs_inode *src, loff_t pos_in,
55*4882a593Smuzhiyun struct xfs_inode *dest, loff_t pos_out, loff_t remap_len,
56*4882a593Smuzhiyun loff_t *remapped);
57*4882a593Smuzhiyun extern int xfs_reflink_update_dest(struct xfs_inode *dest, xfs_off_t newlen,
58*4882a593Smuzhiyun xfs_extlen_t cowextsize, unsigned int remap_flags);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun #endif /* __XFS_REFLINK_H */
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