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_range(struct xfs_inode *ip, 30 xfs_off_t offset, xfs_off_t count); 31 extern int xfs_reflink_allocate_cow_range(struct xfs_inode *ip, 32 xfs_off_t offset, xfs_off_t count); 33 extern bool xfs_reflink_find_cow_mapping(struct xfs_inode *ip, xfs_off_t offset, 34 struct xfs_bmbt_irec *imap, bool *need_alloc); 35 extern int xfs_reflink_trim_irec_to_next_cow(struct xfs_inode *ip, 36 xfs_fileoff_t offset_fsb, struct xfs_bmbt_irec *imap); 37 38 extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip, 39 struct xfs_trans **tpp, xfs_fileoff_t offset_fsb, 40 xfs_fileoff_t end_fsb); 41 extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset, 42 xfs_off_t count); 43 extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset, 44 xfs_off_t count); 45 extern int xfs_reflink_recover_cow(struct xfs_mount *mp); 46 #define XFS_REFLINK_DEDUPE 1 /* only reflink if contents match */ 47 #define XFS_REFLINK_ALL (XFS_REFLINK_DEDUPE) 48 extern int xfs_reflink_remap_range(struct xfs_inode *src, xfs_off_t srcoff, 49 struct xfs_inode *dest, xfs_off_t destoff, xfs_off_t len, 50 unsigned int flags); 51 extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip, 52 struct xfs_trans **tpp); 53 extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset, 54 xfs_off_t len); 55 56 extern bool xfs_reflink_has_real_cow_blocks(struct xfs_inode *ip); 57 58 #endif /* __XFS_REFLINK_H */ 59