fs/xfs/xfs_reflink.h

   1 /*
   2  * Copyright (C) 2016 Oracle.  All Rights Reserved.
   3  *
   4  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it would be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write the Free Software Foundation,
  18  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
  19  */
  20 #ifndef __XFS_REFLINK_H
  21 #define __XFS_REFLINK_H 1
  22
  23 extern int xfs_reflink_find_shared(struct xfs_mount *mp, xfs_agnumber_t agno,
  24                 xfs_agblock_t agbno, xfs_extlen_t aglen, xfs_agblock_t *fbno,
  25                 xfs_extlen_t *flen, bool find_maximal);
  26 extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
  27                 struct xfs_bmbt_irec *irec, bool *shared, bool *trimmed);
  28
  29 extern int xfs_reflink_reserve_cow(struct xfs_inode *ip,
  30                 struct xfs_bmbt_irec *imap, bool *shared);
  31 extern int xfs_reflink_allocate_cow_range(struct xfs_inode *ip,
  32                 xfs_off_t offset, xfs_off_t count);
  33 extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
  34                 xfs_off_t count);
  35 extern bool xfs_reflink_find_cow_mapping(struct xfs_inode *ip, xfs_off_t offset,
  36                 struct xfs_bmbt_irec *imap, bool *need_alloc);
  37 extern int xfs_reflink_trim_irec_to_next_cow(struct xfs_inode *ip,
  38                 xfs_fileoff_t offset_fsb, struct xfs_bmbt_irec *imap);
  39
  40 extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
  41                 struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
  42                 xfs_fileoff_t end_fsb, bool cancel_real);
  43 extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
  44                 xfs_off_t count, bool cancel_real);
  45 extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
  46                 xfs_off_t count);
  47 extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
  48 extern int xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
  49                 struct file *file_out, loff_t pos_out, u64 len, bool is_dedupe);
  50 extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
  51                 struct xfs_trans **tpp);
  52 extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
  53                 xfs_off_t len);
  54
  55 #endif /* __XFS_REFLINK_H */