mirror of https://gitee.com/openkylin/linux.git
61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <darrick.wong@oracle.com>
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*/
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#ifndef __XFS_REFLINK_H
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#define __XFS_REFLINK_H 1
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static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip)
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{
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return ip->i_mount->m_always_cow &&
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xfs_sb_version_hasreflink(&ip->i_mount->m_sb);
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}
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static inline bool xfs_is_cow_inode(struct xfs_inode *ip)
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{
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return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
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}
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extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
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xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
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xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
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extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
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struct xfs_bmbt_irec *irec, bool *shared);
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int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
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bool *shared);
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int xfs_reflink_allocate_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
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struct xfs_bmbt_irec *cmap, bool *shared, uint *lockmode,
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bool convert_now);
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extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
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xfs_off_t count);
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extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
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struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
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xfs_fileoff_t end_fsb, bool cancel_real);
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extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
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xfs_off_t count, bool cancel_real);
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extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
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xfs_off_t count);
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extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
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extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
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struct file *file_out, loff_t pos_out, loff_t len,
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unsigned int remap_flags);
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extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
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struct xfs_inode *ip, bool *has_shared);
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extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
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struct xfs_trans **tpp);
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extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
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xfs_off_t len);
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extern int xfs_reflink_remap_prep(struct file *file_in, loff_t pos_in,
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struct file *file_out, loff_t pos_out, loff_t *len,
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unsigned int remap_flags);
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extern int xfs_reflink_remap_blocks(struct xfs_inode *src, loff_t pos_in,
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struct xfs_inode *dest, loff_t pos_out, loff_t remap_len,
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loff_t *remapped);
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extern int xfs_reflink_update_dest(struct xfs_inode *dest, xfs_off_t newlen,
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xfs_extlen_t cowextsize, unsigned int remap_flags);
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#endif /* __XFS_REFLINK_H */
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