ocfs2_lockid.h 2.7 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. * ocfs2_lockid.h
  6. *
  7. * Defines OCFS2 lockid bits.
  8. *
  9. * Copyright (C) 2002, 2005 Oracle. All rights reserved.
  10. */
  11. #ifndef OCFS2_LOCKID_H
  12. #define OCFS2_LOCKID_H
  13. /* lock ids are made up in the following manner:
  14. * name[0] --> type
  15. * name[1-6] --> 6 pad characters, reserved for now
  16. * name[7-22] --> block number, expressed in hex as 16 chars
  17. * name[23-30] --> i_generation, expressed in hex 8 chars
  18. * name[31] --> '\0' */
  19. #define OCFS2_LOCK_ID_MAX_LEN 32
  20. #define OCFS2_LOCK_ID_PAD "000000"
  21. #define OCFS2_DENTRY_LOCK_INO_START 18
  22. enum ocfs2_lock_type {
  23. OCFS2_LOCK_TYPE_META = 0,
  24. OCFS2_LOCK_TYPE_DATA,
  25. OCFS2_LOCK_TYPE_SUPER,
  26. OCFS2_LOCK_TYPE_RENAME,
  27. OCFS2_LOCK_TYPE_RW,
  28. OCFS2_LOCK_TYPE_DENTRY,
  29. OCFS2_LOCK_TYPE_OPEN,
  30. OCFS2_LOCK_TYPE_FLOCK,
  31. OCFS2_LOCK_TYPE_QINFO,
  32. OCFS2_LOCK_TYPE_NFS_SYNC,
  33. OCFS2_LOCK_TYPE_ORPHAN_SCAN,
  34. OCFS2_LOCK_TYPE_REFCOUNT,
  35. OCFS2_LOCK_TYPE_TRIM_FS,
  36. OCFS2_NUM_LOCK_TYPES
  37. };
  38. static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
  39. {
  40. char c;
  41. switch (type) {
  42. case OCFS2_LOCK_TYPE_META:
  43. c = 'M';
  44. break;
  45. case OCFS2_LOCK_TYPE_DATA:
  46. c = 'D';
  47. break;
  48. case OCFS2_LOCK_TYPE_SUPER:
  49. c = 'S';
  50. break;
  51. case OCFS2_LOCK_TYPE_RENAME:
  52. c = 'R';
  53. break;
  54. case OCFS2_LOCK_TYPE_RW:
  55. c = 'W';
  56. break;
  57. case OCFS2_LOCK_TYPE_DENTRY:
  58. c = 'N';
  59. break;
  60. case OCFS2_LOCK_TYPE_OPEN:
  61. c = 'O';
  62. break;
  63. case OCFS2_LOCK_TYPE_FLOCK:
  64. c = 'F';
  65. break;
  66. case OCFS2_LOCK_TYPE_QINFO:
  67. c = 'Q';
  68. break;
  69. case OCFS2_LOCK_TYPE_NFS_SYNC:
  70. c = 'Y';
  71. break;
  72. case OCFS2_LOCK_TYPE_ORPHAN_SCAN:
  73. c = 'P';
  74. break;
  75. case OCFS2_LOCK_TYPE_REFCOUNT:
  76. c = 'T';
  77. break;
  78. case OCFS2_LOCK_TYPE_TRIM_FS:
  79. c = 'I';
  80. break;
  81. default:
  82. c = '\0';
  83. }
  84. return c;
  85. }
  86. static char *ocfs2_lock_type_strings[] = {
  87. [OCFS2_LOCK_TYPE_META] = "Meta",
  88. [OCFS2_LOCK_TYPE_DATA] = "Data",
  89. [OCFS2_LOCK_TYPE_SUPER] = "Super",
  90. [OCFS2_LOCK_TYPE_RENAME] = "Rename",
  91. /* Need to differntiate from [R]ename.. serializing writes is the
  92. * important job it does, anyway. */
  93. [OCFS2_LOCK_TYPE_RW] = "Write/Read",
  94. [OCFS2_LOCK_TYPE_DENTRY] = "Dentry",
  95. [OCFS2_LOCK_TYPE_OPEN] = "Open",
  96. [OCFS2_LOCK_TYPE_FLOCK] = "Flock",
  97. [OCFS2_LOCK_TYPE_QINFO] = "Quota",
  98. [OCFS2_LOCK_TYPE_NFS_SYNC] = "NFSSync",
  99. [OCFS2_LOCK_TYPE_ORPHAN_SCAN] = "OrphanScan",
  100. [OCFS2_LOCK_TYPE_REFCOUNT] = "Refcount",
  101. [OCFS2_LOCK_TYPE_TRIM_FS] = "TrimFs",
  102. };
  103. static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
  104. {
  105. #ifdef __KERNEL__
  106. BUG_ON(type >= OCFS2_NUM_LOCK_TYPES);
  107. #endif
  108. return ocfs2_lock_type_strings[type];
  109. }
  110. #endif /* OCFS2_LOCKID_H */