fs/xfs/xfs_reflink.h

   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 extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
  10                 xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
  11                 xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
  12 extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
  13                 struct xfs_bmbt_irec *irec, bool *shared);
  14
  15 extern int xfs_reflink_reserve_cow(struct xfs_inode *ip,
  16                 struct xfs_bmbt_irec *imap);
  17 extern int xfs_reflink_allocate_cow(struct xfs_inode *ip,
  18                 struct xfs_bmbt_irec *imap, bool *shared, uint *lockmode);
  19 extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
  20                 xfs_off_t count);
  21
  22 extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
  23                 struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
  24                 xfs_fileoff_t end_fsb, bool cancel_real);
  25 extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
  26                 xfs_off_t count, bool cancel_real);
  27 extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
  28                 xfs_off_t count);
  29 extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
  30 extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
  31                 struct file *file_out, loff_t pos_out, loff_t len,
  32                 unsigned int remap_flags);
  33 extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
  34                 struct xfs_inode *ip, bool *has_shared);
  35 extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
  36                 struct xfs_trans **tpp);
  37 extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
  38                 xfs_off_t len);
  39 extern int xfs_reflink_remap_prep(struct file *file_in, loff_t pos_in,
  40                 struct file *file_out, loff_t pos_out, loff_t *len,
  41                 unsigned int remap_flags);
  42 extern int xfs_reflink_remap_blocks(struct xfs_inode *src, loff_t pos_in,
  43                 struct xfs_inode *dest, loff_t pos_out, loff_t remap_len,
  44                 loff_t *remapped);
  45 extern int xfs_reflink_update_dest(struct xfs_inode *dest, xfs_off_t newlen,
  46                 xfs_extlen_t cowextsize, unsigned int remap_flags);
  47 extern void xfs_reflink_remap_unlock(struct file *file_in,
  48                 struct file *file_out);
  49
  50 #endif /* __XFS_REFLINK_H */