inode.h 6.0 KB

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  1. /* -*- mode: c; c-basic-offset: 8; -*-
  2. * vim: noexpandtab sw=8 ts=8 sts=0:
  3. *
  4. * inode.h
  5. *
  6. * Function prototypes
  7. *
  8. * Copyright (C) 2002, 2004 Oracle. All rights reserved.
  9. *
  10. * This program is free software; you can redistribute it and/or
  11. * modify it under the terms of the GNU General Public
  12. * License as published by the Free Software Foundation; either
  13. * version 2 of the License, or (at your option) any later version.
  14. *
  15. * This program is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18. * General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU General Public
  21. * License along with this program; if not, write to the
  22. * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23. * Boston, MA 021110-1307, USA.
  24. */
  25. #ifndef OCFS2_INODE_H
  26. #define OCFS2_INODE_H
  27. #include "extent_map.h"
  28. /* OCFS2 Inode Private Data */
  29. struct ocfs2_inode_info
  30. {
  31. u64 ip_blkno;
  32. struct ocfs2_lock_res ip_rw_lockres;
  33. struct ocfs2_lock_res ip_inode_lockres;
  34. struct ocfs2_lock_res ip_open_lockres;
  35. /* protects allocation changes on this inode. */
  36. struct rw_semaphore ip_alloc_sem;
  37. /* protects extended attribute changes on this inode */
  38. struct rw_semaphore ip_xattr_sem;
  39. /* These fields are protected by ip_lock */
  40. spinlock_t ip_lock;
  41. u32 ip_open_count;
  42. struct list_head ip_io_markers;
  43. u32 ip_clusters;
  44. u16 ip_dyn_features;
  45. struct mutex ip_io_mutex;
  46. u32 ip_flags; /* see below */
  47. u32 ip_attr; /* inode attributes */
  48. /* protected by recovery_lock. */
  49. struct inode *ip_next_orphan;
  50. struct ocfs2_caching_info ip_metadata_cache;
  51. struct ocfs2_extent_map ip_extent_map;
  52. struct inode vfs_inode;
  53. struct jbd2_inode ip_jinode;
  54. u32 ip_dir_start_lookup;
  55. /* Only valid if the inode is the dir. */
  56. u32 ip_last_used_slot;
  57. u64 ip_last_used_group;
  58. u32 ip_dir_lock_gen;
  59. struct ocfs2_alloc_reservation ip_la_data_resv;
  60. };
  61. /*
  62. * Flags for the ip_flags field
  63. */
  64. /* System file inodes */
  65. #define OCFS2_INODE_SYSTEM_FILE 0x00000001
  66. #define OCFS2_INODE_JOURNAL 0x00000002
  67. #define OCFS2_INODE_BITMAP 0x00000004
  68. /* This inode has been wiped from disk */
  69. #define OCFS2_INODE_DELETED 0x00000008
  70. /* Another node is deleting, so our delete is a nop */
  71. #define OCFS2_INODE_SKIP_DELETE 0x00000010
  72. /* Has the inode been orphaned on another node?
  73. *
  74. * This hints to ocfs2_drop_inode that it should clear i_nlink before
  75. * continuing.
  76. *
  77. * We *only* set this on unlink vote from another node. If the inode
  78. * was locally orphaned, then we're sure of the state and don't need
  79. * to twiddle i_nlink later - it's either zero or not depending on
  80. * whether our unlink succeeded. Otherwise we got this from a node
  81. * whose intention was to orphan the inode, however he may have
  82. * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
  83. * rely on ocfs2_delete_inode to sort things out under the proper
  84. * cluster locks.
  85. */
  86. #define OCFS2_INODE_MAYBE_ORPHANED 0x00000020
  87. /* Does someone have the file open O_DIRECT */
  88. #define OCFS2_INODE_OPEN_DIRECT 0x00000040
  89. /* Tell the inode wipe code it's not in orphan dir */
  90. #define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000080
  91. static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
  92. {
  93. return container_of(inode, struct ocfs2_inode_info, vfs_inode);
  94. }
  95. #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
  96. #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
  97. extern struct kmem_cache *ocfs2_inode_cache;
  98. extern const struct address_space_operations ocfs2_aops;
  99. extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
  100. static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
  101. {
  102. return &OCFS2_I(inode)->ip_metadata_cache;
  103. }
  104. void ocfs2_evict_inode(struct inode *inode);
  105. int ocfs2_drop_inode(struct inode *inode);
  106. /* Flags for ocfs2_iget() */
  107. #define OCFS2_FI_FLAG_SYSFILE 0x1
  108. #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
  109. struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
  110. struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
  111. int sysfile_type);
  112. int ocfs2_inode_init_private(struct inode *inode);
  113. int ocfs2_inode_revalidate(struct dentry *dentry);
  114. void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
  115. int create_ino);
  116. void ocfs2_read_inode(struct inode *inode);
  117. void ocfs2_read_inode2(struct inode *inode, void *opaque);
  118. ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
  119. size_t size, loff_t *offp);
  120. void ocfs2_sync_blockdev(struct super_block *sb);
  121. void ocfs2_refresh_inode(struct inode *inode,
  122. struct ocfs2_dinode *fe);
  123. int ocfs2_mark_inode_dirty(handle_t *handle,
  124. struct inode *inode,
  125. struct buffer_head *bh);
  126. int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
  127. int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
  128. struct buffer_head *ocfs2_bread(struct inode *inode,
  129. int block, int *err, int reada);
  130. void ocfs2_set_inode_flags(struct inode *inode);
  131. void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
  132. static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
  133. {
  134. int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
  135. return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
  136. }
  137. /* Validate that a bh contains a valid inode */
  138. int ocfs2_validate_inode_block(struct super_block *sb,
  139. struct buffer_head *bh);
  140. /*
  141. * Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
  142. * This is a cached read. The inode will be validated with
  143. * ocfs2_validate_inode_block().
  144. */
  145. int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
  146. /* The same, but can be passed OCFS2_BH_* flags */
  147. int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
  148. int flags);
  149. static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
  150. {
  151. return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
  152. }
  153. #endif /* OCFS2_INODE_H */