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 && 12 xfs_sb_version_hasreflink(&ip->i_mount->m_sb); 13 } 14 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