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 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 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