uptodate.h 2.3 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /* -*- mode: c; c-basic-offset: 8; -*-
  3. * vim: noexpandtab sw=8 ts=8 sts=0:
  4. *
  5. * uptodate.h
  6. *
  7. * Cluster uptodate tracking
  8. *
  9. * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
  10. */
  11. #ifndef OCFS2_UPTODATE_H
  12. #define OCFS2_UPTODATE_H
  13. /*
  14. * The caching code relies on locking provided by the user of
  15. * struct ocfs2_caching_info. These operations connect that up.
  16. */
  17. struct ocfs2_caching_operations {
  18. /*
  19. * A u64 representing the owning structure. Usually this
  20. * is the block number (i_blkno or whatnot). This is used so
  21. * that caching log messages can identify the owning structure.
  22. */
  23. u64 (*co_owner)(struct ocfs2_caching_info *ci);
  24. /* The superblock is needed during I/O. */
  25. struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci);
  26. /*
  27. * Lock and unlock the caching data. These will not sleep, and
  28. * should probably be spinlocks.
  29. */
  30. void (*co_cache_lock)(struct ocfs2_caching_info *ci);
  31. void (*co_cache_unlock)(struct ocfs2_caching_info *ci);
  32. /*
  33. * Lock and unlock for disk I/O. These will sleep, and should
  34. * be mutexes.
  35. */
  36. void (*co_io_lock)(struct ocfs2_caching_info *ci);
  37. void (*co_io_unlock)(struct ocfs2_caching_info *ci);
  38. };
  39. int __init init_ocfs2_uptodate_cache(void);
  40. void exit_ocfs2_uptodate_cache(void);
  41. void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
  42. const struct ocfs2_caching_operations *ops);
  43. void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
  44. void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
  45. u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
  46. void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci);
  47. void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci);
  48. int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
  49. struct buffer_head *bh);
  50. void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
  51. struct buffer_head *bh);
  52. void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
  53. struct buffer_head *bh);
  54. void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
  55. struct buffer_head *bh);
  56. void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
  57. sector_t block,
  58. u32 c_len);
  59. int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
  60. struct buffer_head *bh);
  61. #endif /* OCFS2_UPTODATE_H */