LXR linux/fs/xfs/xfs

   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
   9static 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
  14static 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
  19extern 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);
  22extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
  23                struct xfs_bmbt_irec *irec, bool *shared);
  24int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
  25                bool *shared);
  26
  27int 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);
  30extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
  31                xfs_off_t count);
  32
  33extern 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);
  36extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
  37                xfs_off_t count, bool cancel_real);
  38extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
  39                xfs_off_t count);
  40extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
  41extern 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);
  44extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
  45                struct xfs_inode *ip, bool *has_shared);
  46extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
  47                struct xfs_trans **tpp);
  48extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
  49                xfs_off_t len);
  50extern 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);
  53extern 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);
  56extern 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