| | 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 */ |
projects / linux-2.6-block.git / blame_incremental