dlmglue.h 4.8 KB

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  1. /* -*- mode: c; c-basic-offset: 8; -*-
  2. * vim: noexpandtab sw=8 ts=8 sts=0:
  3. *
  4. * dlmglue.h
  5. *
  6. * description here
  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 DLMGLUE_H
  26. #define DLMGLUE_H
  27. #include "dcache.h"
  28. #define OCFS2_LVB_VERSION 5
  29. struct ocfs2_meta_lvb {
  30. __u8 lvb_version;
  31. __u8 lvb_reserved0;
  32. __be16 lvb_idynfeatures;
  33. __be32 lvb_iclusters;
  34. __be32 lvb_iuid;
  35. __be32 lvb_igid;
  36. __be64 lvb_iatime_packed;
  37. __be64 lvb_ictime_packed;
  38. __be64 lvb_imtime_packed;
  39. __be64 lvb_isize;
  40. __be16 lvb_imode;
  41. __be16 lvb_inlink;
  42. __be32 lvb_iattr;
  43. __be32 lvb_igeneration;
  44. __be32 lvb_reserved2;
  45. };
  46. #define OCFS2_QINFO_LVB_VERSION 1
  47. struct ocfs2_qinfo_lvb {
  48. __u8 lvb_version;
  49. __u8 lvb_reserved[3];
  50. __be32 lvb_bgrace;
  51. __be32 lvb_igrace;
  52. __be32 lvb_syncms;
  53. __be32 lvb_blocks;
  54. __be32 lvb_free_blk;
  55. __be32 lvb_free_entry;
  56. };
  57. /* ocfs2_inode_lock_full() 'arg_flags' flags */
  58. /* don't wait on recovery. */
  59. #define OCFS2_META_LOCK_RECOVERY (0x01)
  60. /* Instruct the dlm not to queue ourselves on the other node. */
  61. #define OCFS2_META_LOCK_NOQUEUE (0x02)
  62. /* don't block waiting for the downconvert thread, instead return -EAGAIN */
  63. #define OCFS2_LOCK_NONBLOCK (0x04)
  64. int ocfs2_dlm_init(struct ocfs2_super *osb);
  65. void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending);
  66. void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
  67. void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
  68. enum ocfs2_lock_type type,
  69. unsigned int generation,
  70. struct inode *inode);
  71. void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
  72. u64 parent, struct inode *inode);
  73. struct ocfs2_file_private;
  74. void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
  75. struct ocfs2_file_private *fp);
  76. struct ocfs2_mem_dqinfo;
  77. void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres,
  78. struct ocfs2_mem_dqinfo *info);
  79. void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
  80. int ocfs2_create_new_inode_locks(struct inode *inode);
  81. int ocfs2_drop_inode_locks(struct inode *inode);
  82. int ocfs2_rw_lock(struct inode *inode, int write);
  83. void ocfs2_rw_unlock(struct inode *inode, int write);
  84. int ocfs2_open_lock(struct inode *inode);
  85. int ocfs2_try_open_lock(struct inode *inode, int write);
  86. void ocfs2_open_unlock(struct inode *inode);
  87. int ocfs2_inode_lock_atime(struct inode *inode,
  88. struct vfsmount *vfsmnt,
  89. int *level);
  90. int ocfs2_inode_lock_full(struct inode *inode,
  91. struct buffer_head **ret_bh,
  92. int ex,
  93. int arg_flags);
  94. int ocfs2_inode_lock_with_page(struct inode *inode,
  95. struct buffer_head **ret_bh,
  96. int ex,
  97. struct page *page);
  98. /* 99% of the time we don't want to supply any additional flags --
  99. * those are for very specific cases only. */
  100. #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full(i, b, e, 0)
  101. void ocfs2_inode_unlock(struct inode *inode,
  102. int ex);
  103. int ocfs2_super_lock(struct ocfs2_super *osb,
  104. int ex);
  105. void ocfs2_super_unlock(struct ocfs2_super *osb,
  106. int ex);
  107. int ocfs2_rename_lock(struct ocfs2_super *osb);
  108. void ocfs2_rename_unlock(struct ocfs2_super *osb);
  109. int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex);
  110. void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex);
  111. int ocfs2_dentry_lock(struct dentry *dentry, int ex);
  112. void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
  113. int ocfs2_file_lock(struct file *file, int ex, int trylock);
  114. void ocfs2_file_unlock(struct file *file);
  115. int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex);
  116. void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex);
  117. void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
  118. void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
  119. struct ocfs2_lock_res *lockres);
  120. /* for the downconvert thread */
  121. void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
  122. struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
  123. void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
  124. /* To set the locking protocol on module initialization */
  125. void ocfs2_set_locking_protocol(void);
  126. #endif /* DLMGLUE_H */