inode.h 5.3 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. * inode.h
  6. *
  7. * Function prototypes
  8. *
  9. * Copyright (C) 2002, 2004 Oracle. All rights reserved.
  10. */
  11. #ifndef OCFS2_INODE_H
  12. #define OCFS2_INODE_H
  13. #include "extent_map.h"
  14. /* OCFS2 Inode Private Data */
  15. struct ocfs2_inode_info
  16. {
  17. u64 ip_blkno;
  18. struct ocfs2_lock_res ip_rw_lockres;
  19. struct ocfs2_lock_res ip_inode_lockres;
  20. struct ocfs2_lock_res ip_open_lockres;
  21. /* protects allocation changes on this inode. */
  22. struct rw_semaphore ip_alloc_sem;
  23. /* protects extended attribute changes on this inode */
  24. struct rw_semaphore ip_xattr_sem;
  25. /* These fields are protected by ip_lock */
  26. spinlock_t ip_lock;
  27. u32 ip_open_count;
  28. struct list_head ip_io_markers;
  29. u32 ip_clusters;
  30. u16 ip_dyn_features;
  31. struct mutex ip_io_mutex;
  32. u32 ip_flags; /* see below */
  33. u32 ip_attr; /* inode attributes */
  34. /* Record unwritten extents during direct io. */
  35. struct list_head ip_unwritten_list;
  36. /* protected by recovery_lock. */
  37. struct inode *ip_next_orphan;
  38. struct ocfs2_caching_info ip_metadata_cache;
  39. struct ocfs2_extent_map ip_extent_map;
  40. struct inode vfs_inode;
  41. struct jbd2_inode ip_jinode;
  42. u32 ip_dir_start_lookup;
  43. /* Only valid if the inode is the dir. */
  44. u32 ip_last_used_slot;
  45. u64 ip_last_used_group;
  46. u32 ip_dir_lock_gen;
  47. struct ocfs2_alloc_reservation ip_la_data_resv;
  48. /*
  49. * Transactions that contain inode's metadata needed to complete
  50. * fsync and fdatasync, respectively.
  51. */
  52. tid_t i_sync_tid;
  53. tid_t i_datasync_tid;
  54. struct dquot *i_dquot[MAXQUOTAS];
  55. };
  56. /*
  57. * Flags for the ip_flags field
  58. */
  59. /* System file inodes */
  60. #define OCFS2_INODE_SYSTEM_FILE 0x00000001
  61. #define OCFS2_INODE_JOURNAL 0x00000002
  62. #define OCFS2_INODE_BITMAP 0x00000004
  63. /* This inode has been wiped from disk */
  64. #define OCFS2_INODE_DELETED 0x00000008
  65. /* Has the inode been orphaned on another node?
  66. *
  67. * This hints to ocfs2_drop_inode that it should clear i_nlink before
  68. * continuing.
  69. *
  70. * We *only* set this on unlink vote from another node. If the inode
  71. * was locally orphaned, then we're sure of the state and don't need
  72. * to twiddle i_nlink later - it's either zero or not depending on
  73. * whether our unlink succeeded. Otherwise we got this from a node
  74. * whose intention was to orphan the inode, however he may have
  75. * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
  76. * rely on ocfs2_delete_inode to sort things out under the proper
  77. * cluster locks.
  78. */
  79. #define OCFS2_INODE_MAYBE_ORPHANED 0x00000010
  80. /* Does someone have the file open O_DIRECT */
  81. #define OCFS2_INODE_OPEN_DIRECT 0x00000020
  82. /* Tell the inode wipe code it's not in orphan dir */
  83. #define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000040
  84. /* Entry in orphan dir with 'dio-' prefix */
  85. #define OCFS2_INODE_DIO_ORPHAN_ENTRY 0x00000080
  86. static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
  87. {
  88. return container_of(inode, struct ocfs2_inode_info, vfs_inode);
  89. }
  90. #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
  91. #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
  92. extern const struct address_space_operations ocfs2_aops;
  93. extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
  94. static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
  95. {
  96. return &OCFS2_I(inode)->ip_metadata_cache;
  97. }
  98. void ocfs2_evict_inode(struct inode *inode);
  99. int ocfs2_drop_inode(struct inode *inode);
  100. /* Flags for ocfs2_iget() */
  101. #define OCFS2_FI_FLAG_SYSFILE 0x1
  102. #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
  103. #define OCFS2_FI_FLAG_FILECHECK_CHK 0x4
  104. #define OCFS2_FI_FLAG_FILECHECK_FIX 0x8
  105. struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
  106. struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
  107. int sysfile_type);
  108. int ocfs2_inode_revalidate(struct dentry *dentry);
  109. void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
  110. int create_ino);
  111. void ocfs2_sync_blockdev(struct super_block *sb);
  112. void ocfs2_refresh_inode(struct inode *inode,
  113. struct ocfs2_dinode *fe);
  114. int ocfs2_mark_inode_dirty(handle_t *handle,
  115. struct inode *inode,
  116. struct buffer_head *bh);
  117. void ocfs2_set_inode_flags(struct inode *inode);
  118. void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
  119. static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
  120. {
  121. int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
  122. return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits;
  123. }
  124. /* Validate that a bh contains a valid inode */
  125. int ocfs2_validate_inode_block(struct super_block *sb,
  126. struct buffer_head *bh);
  127. /*
  128. * Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
  129. * This is a cached read. The inode will be validated with
  130. * ocfs2_validate_inode_block().
  131. */
  132. int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
  133. /* The same, but can be passed OCFS2_BH_* flags */
  134. int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
  135. int flags);
  136. static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
  137. {
  138. return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
  139. }
  140. /* Does this inode have the reflink flag set? */
  141. static inline bool ocfs2_is_refcount_inode(struct inode *inode)
  142. {
  143. return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
  144. }
  145. #endif /* OCFS2_INODE_H */