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_trim_around_shared(struct xfs_inode *ip, 20 struct xfs_bmbt_irec *irec, bool *shared); 21 int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap, 22 bool *shared); 23 24 int 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); 27 extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset, 28 xfs_off_t count); 29 30 extern 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); 33 extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset, 34 xfs_off_t count, bool cancel_real); 35 extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset, 36 xfs_off_t count); 37 extern int xfs_reflink_recover_cow(struct xfs_mount *mp); 38 extern 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); 41 extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp, 42 struct xfs_inode *ip, bool *has_shared); 43 extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip, 44 struct xfs_trans **tpp); 45 extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset, 46 xfs_off_t len); 47 extern 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); 50 extern 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); 53 extern 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 */ 57