Line data    Source code

       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  2749754953 : static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip)
      10             : {
      11  2749754953 :         return ip->i_mount->m_always_cow && xfs_has_reflink(ip->i_mount);
      12             : }
      13             : 
      14  3153389652 : static inline bool xfs_is_cow_inode(struct xfs_inode *ip)
      15             : {
      16  3153389652 :         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 */