xfs_reflink.h 2.4 KB

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  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. static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip)
  9. {
  10. return ip->i_mount->m_always_cow &&
  11. xfs_sb_version_hasreflink(&ip->i_mount->m_sb);
  12. }
  13. static inline bool xfs_is_cow_inode(struct xfs_inode *ip)
  14. {
  15. return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
  16. }
  17. extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
  18. xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
  19. xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
  20. extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
  21. struct xfs_bmbt_irec *irec, bool *shared);
  22. int xfs_bmap_trim_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
  23. bool *shared);
  24. int xfs_reflink_allocate_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
  25. struct xfs_bmbt_irec *cmap, bool *shared, uint *lockmode,
  26. bool convert_now);
  27. extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
  28. xfs_off_t count);
  29. extern int xfs_reflink_cancel_cow_blocks(struct xfs_inode *ip,
  30. struct xfs_trans **tpp, xfs_fileoff_t offset_fsb,
  31. xfs_fileoff_t end_fsb, bool cancel_real);
  32. extern int xfs_reflink_cancel_cow_range(struct xfs_inode *ip, xfs_off_t offset,
  33. xfs_off_t count, bool cancel_real);
  34. extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
  35. xfs_off_t count);
  36. extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
  37. extern loff_t xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
  38. struct file *file_out, loff_t pos_out, loff_t len,
  39. unsigned int remap_flags);
  40. extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
  41. struct xfs_inode *ip, bool *has_shared);
  42. extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,
  43. struct xfs_trans **tpp);
  44. extern int xfs_reflink_unshare(struct xfs_inode *ip, xfs_off_t offset,
  45. xfs_off_t len);
  46. extern int xfs_reflink_remap_prep(struct file *file_in, loff_t pos_in,
  47. struct file *file_out, loff_t pos_out, loff_t *len,
  48. unsigned int remap_flags);
  49. extern int xfs_reflink_remap_blocks(struct xfs_inode *src, loff_t pos_in,
  50. struct xfs_inode *dest, loff_t pos_out, loff_t remap_len,
  51. loff_t *remapped);
  52. extern int xfs_reflink_update_dest(struct xfs_inode *dest, xfs_off_t newlen,
  53. xfs_extlen_t cowextsize, unsigned int remap_flags);
  54. #endif /* __XFS_REFLINK_H */