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ark1668ed-bsp
/
linux
/
fs
/
ocfs2
/
uptodate.h

uptodate.h 2.3 KB
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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
    2. 

  2. /*
    3. 

  3.  * uptodate.h
    4. 

  4.  *
    5. 

  5.  * Cluster uptodate tracking
    6. 

  6.  *
    7. 

  7.  * Copyright (C) 2002, 2004, 2005 Oracle.  All rights reserved.
    8. 

  8.  */
    9. 

  9. 

  10. #ifndef OCFS2_UPTODATE_H
    11. 

  11. #define OCFS2_UPTODATE_H
    12. 

  12. 

  13. /*
    14. 

  14.  * The caching code relies on locking provided by the user of
    15. 

  15.  * struct ocfs2_caching_info.  These operations connect that up.
    16. 

  16.  */
    17. 

  17. struct ocfs2_caching_operations {
    18. 

  18. 	/*
    19. 

  19. 	 * A u64 representing the owning structure.  Usually this
    20. 

  20. 	 * is the block number (i_blkno or whatnot).  This is used so
    21. 

  21. 	 * that caching log messages can identify the owning structure.
    22. 

  22. 	 */
    23. 

  23. 	u64	(*co_owner)(struct ocfs2_caching_info *ci);
    24. 

  24. 

  25. 	/* The superblock is needed during I/O. */
    26. 

  26. 	struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci);
    27. 

  27. 	/*
    28. 

  28. 	 * Lock and unlock the caching data.  These will not sleep, and
    29. 

  29. 	 * should probably be spinlocks.
    30. 

  30. 	 */
    31. 

  31. 	void	(*co_cache_lock)(struct ocfs2_caching_info *ci);
    32. 

  32. 	void	(*co_cache_unlock)(struct ocfs2_caching_info *ci);
    33. 

  33. 

  34. 	/*
    35. 

  35. 	 * Lock and unlock for disk I/O.  These will sleep, and should
    36. 

  36. 	 * be mutexes.
    37. 

  37. 	 */
    38. 

  38. 	void	(*co_io_lock)(struct ocfs2_caching_info *ci);
    39. 

  39. 	void	(*co_io_unlock)(struct ocfs2_caching_info *ci);
    40. 

  40. };
    41. 

  41. 

  42. int __init init_ocfs2_uptodate_cache(void);
    43. 

  43. void exit_ocfs2_uptodate_cache(void);
    44. 

  44. 

  45. void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
    46. 

  46. 			       const struct ocfs2_caching_operations *ops);
    47. 

  47. void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
    48. 

  48. void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
    49. 

  49. 

  50. u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
    51. 

  51. void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci);
    52. 

  52. void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci);
    53. 

  53. 

  54. int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
    55. 

  55. 			  struct buffer_head *bh);
    56. 

  56. void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
    57. 

  57. 			       struct buffer_head *bh);
    58. 

  58. void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
    59. 

  59. 				   struct buffer_head *bh);
    60. 

  60. void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
    61. 

  61. 			     struct buffer_head *bh);
    62. 

  62. void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
    63. 

  63. 					    sector_t block,
    64. 

  64. 					    u32 c_len);
    65. 

  65. int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
    66. 

  66. 			    struct buffer_head *bh);
    67. 

  67. 

  68. #endif /* OCFS2_UPTODATE_H */
    69.