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xfs_refcount.h

xfs_refcount.h 2.6 KB
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  1. /*
    2. 

  2.  * Copyright (C) 2016 Oracle.  All Rights Reserved.
    3. 

  3.  *
    4. 

  4.  * Author: Darrick J. Wong <darrick.wong@oracle.com>
    5. 

  5.  *
    6. 

  6.  * This program is free software; you can redistribute it and/or
    7. 

  7.  * modify it under the terms of the GNU General Public License
    8. 

  8.  * as published by the Free Software Foundation; either version 2
    9. 

  9.  * of the License, or (at your option) any later version.
    10. 

  10.  *
    11. 

  11.  * This program is distributed in the hope that it would be useful,
    12. 

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    13. 

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14. 

  14.  * GNU General Public License for more details.
    15. 

  15.  *
    16. 

  16.  * You should have received a copy of the GNU General Public License
    17. 

  17.  * along with this program; if not, write the Free Software Foundation,
    18. 

  18.  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
    19. 

  19.  */
    20. 

  20. #ifndef __XFS_REFCOUNT_H__
    21. 

  21. #define __XFS_REFCOUNT_H__
    22. 

  22. 

  23. extern int xfs_refcount_lookup_le(struct xfs_btree_cur *cur,
    24. 

  24. 		xfs_agblock_t bno, int *stat);
    25. 

  25. extern int xfs_refcount_lookup_ge(struct xfs_btree_cur *cur,
    26. 

  26. 		xfs_agblock_t bno, int *stat);
    27. 

  27. extern int xfs_refcount_get_rec(struct xfs_btree_cur *cur,
    28. 

  28. 		struct xfs_refcount_irec *irec, int *stat);
    29. 

  29. 

  30. enum xfs_refcount_intent_type {
    31. 

  31. 	XFS_REFCOUNT_INCREASE = 1,
    32. 

  32. 	XFS_REFCOUNT_DECREASE,
    33. 

  33. 	XFS_REFCOUNT_ALLOC_COW,
    34. 

  34. 	XFS_REFCOUNT_FREE_COW,
    35. 

  35. };
    36. 

  36. 

  37. struct xfs_refcount_intent {
    38. 

  38. 	struct list_head			ri_list;
    39. 

  39. 	enum xfs_refcount_intent_type		ri_type;
    40. 

  40. 	xfs_fsblock_t				ri_startblock;
    41. 

  41. 	xfs_extlen_t				ri_blockcount;
    42. 

  42. };
    43. 

  43. 

  44. extern int xfs_refcount_increase_extent(struct xfs_mount *mp,
    45. 

  45. 		struct xfs_defer_ops *dfops, struct xfs_bmbt_irec *irec);
    46. 

  46. extern int xfs_refcount_decrease_extent(struct xfs_mount *mp,
    47. 

  47. 		struct xfs_defer_ops *dfops, struct xfs_bmbt_irec *irec);
    48. 

  48. 

  49. extern void xfs_refcount_finish_one_cleanup(struct xfs_trans *tp,
    50. 

  50. 		struct xfs_btree_cur *rcur, int error);
    51. 

  51. extern int xfs_refcount_finish_one(struct xfs_trans *tp,
    52. 

  52. 		struct xfs_defer_ops *dfops, enum xfs_refcount_intent_type type,
    53. 

  53. 		xfs_fsblock_t startblock, xfs_extlen_t blockcount,
    54. 

  54. 		xfs_fsblock_t *new_fsb, xfs_extlen_t *new_len,
    55. 

  55. 		struct xfs_btree_cur **pcur);
    56. 

  56. 

  57. extern int xfs_refcount_find_shared(struct xfs_btree_cur *cur,
    58. 

  58. 		xfs_agblock_t agbno, xfs_extlen_t aglen, xfs_agblock_t *fbno,
    59. 

  59. 		xfs_extlen_t *flen, bool find_end_of_shared);
    60. 

  60. 

  61. extern int xfs_refcount_alloc_cow_extent(struct xfs_mount *mp,
    62. 

  62. 		struct xfs_defer_ops *dfops, xfs_fsblock_t fsb,
    63. 

  63. 		xfs_extlen_t len);
    64. 

  64. extern int xfs_refcount_free_cow_extent(struct xfs_mount *mp,
    65. 

  65. 		struct xfs_defer_ops *dfops, xfs_fsblock_t fsb,
    66. 

  66. 		xfs_extlen_t len);
    67. 

  67. extern int xfs_refcount_recover_cow_leftovers(struct xfs_mount *mp,
    68. 

  68. 		xfs_agnumber_t agno);
    69. 

  69. 

  70. #endif	/* __XFS_REFCOUNT_H__ */
    71.