sysfs.h 5.2 KB

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * sysfs.h - sysfs support declarations.
  4. *
  5. * Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation.
  6. * Copyright (C) 2014 HGST, Inc., a Western Digital Company.
  7. *
  8. * Written by Vyacheslav Dubeyko <Vyacheslav.Dubeyko@hgst.com>
  9. */
  10. #ifndef _NILFS_SYSFS_H
  11. #define _NILFS_SYSFS_H
  12. #include <linux/sysfs.h>
  13. #define NILFS_ROOT_GROUP_NAME "nilfs2"
  14. /*
  15. * struct nilfs_sysfs_dev_subgroups - device subgroup kernel objects
  16. * @sg_superblock_kobj: /sys/fs/<nilfs>/<device>/superblock
  17. * @sg_superblock_kobj_unregister: completion state
  18. * @sg_segctor_kobj: /sys/fs/<nilfs>/<device>/segctor
  19. * @sg_segctor_kobj_unregister: completion state
  20. * @sg_mounted_snapshots_kobj: /sys/fs/<nilfs>/<device>/mounted_snapshots
  21. * @sg_mounted_snapshots_kobj_unregister: completion state
  22. * @sg_checkpoints_kobj: /sys/fs/<nilfs>/<device>/checkpoints
  23. * @sg_checkpoints_kobj_unregister: completion state
  24. * @sg_segments_kobj: /sys/fs/<nilfs>/<device>/segments
  25. * @sg_segments_kobj_unregister: completion state
  26. */
  27. struct nilfs_sysfs_dev_subgroups {
  28. /* /sys/fs/<nilfs>/<device>/superblock */
  29. struct kobject sg_superblock_kobj;
  30. struct completion sg_superblock_kobj_unregister;
  31. /* /sys/fs/<nilfs>/<device>/segctor */
  32. struct kobject sg_segctor_kobj;
  33. struct completion sg_segctor_kobj_unregister;
  34. /* /sys/fs/<nilfs>/<device>/mounted_snapshots */
  35. struct kobject sg_mounted_snapshots_kobj;
  36. struct completion sg_mounted_snapshots_kobj_unregister;
  37. /* /sys/fs/<nilfs>/<device>/checkpoints */
  38. struct kobject sg_checkpoints_kobj;
  39. struct completion sg_checkpoints_kobj_unregister;
  40. /* /sys/fs/<nilfs>/<device>/segments */
  41. struct kobject sg_segments_kobj;
  42. struct completion sg_segments_kobj_unregister;
  43. };
  44. #define NILFS_COMMON_ATTR_STRUCT(name) \
  45. struct nilfs_##name##_attr { \
  46. struct attribute attr; \
  47. ssize_t (*show)(struct kobject *, struct attribute *, \
  48. char *); \
  49. ssize_t (*store)(struct kobject *, struct attribute *, \
  50. const char *, size_t); \
  51. }
  52. NILFS_COMMON_ATTR_STRUCT(feature);
  53. #define NILFS_DEV_ATTR_STRUCT(name) \
  54. struct nilfs_##name##_attr { \
  55. struct attribute attr; \
  56. ssize_t (*show)(struct nilfs_##name##_attr *, struct the_nilfs *, \
  57. char *); \
  58. ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \
  59. const char *, size_t); \
  60. }
  61. NILFS_DEV_ATTR_STRUCT(dev);
  62. NILFS_DEV_ATTR_STRUCT(segments);
  63. NILFS_DEV_ATTR_STRUCT(mounted_snapshots);
  64. NILFS_DEV_ATTR_STRUCT(checkpoints);
  65. NILFS_DEV_ATTR_STRUCT(superblock);
  66. NILFS_DEV_ATTR_STRUCT(segctor);
  67. #define NILFS_CP_ATTR_STRUCT(name) \
  68. struct nilfs_##name##_attr { \
  69. struct attribute attr; \
  70. ssize_t (*show)(struct nilfs_##name##_attr *, struct nilfs_root *, \
  71. char *); \
  72. ssize_t (*store)(struct nilfs_##name##_attr *, struct nilfs_root *, \
  73. const char *, size_t); \
  74. }
  75. NILFS_CP_ATTR_STRUCT(snapshot);
  76. #define NILFS_ATTR(type, name, mode, show, store) \
  77. static struct nilfs_##type##_attr nilfs_##type##_attr_##name = \
  78. __ATTR(name, mode, show, store)
  79. #define NILFS_INFO_ATTR(type, name) \
  80. NILFS_ATTR(type, name, 0444, NULL, NULL)
  81. #define NILFS_RO_ATTR(type, name) \
  82. NILFS_ATTR(type, name, 0444, nilfs_##type##_##name##_show, NULL)
  83. #define NILFS_RW_ATTR(type, name) \
  84. NILFS_ATTR(type, name, 0644, \
  85. nilfs_##type##_##name##_show, \
  86. nilfs_##type##_##name##_store)
  87. #define NILFS_FEATURE_INFO_ATTR(name) \
  88. NILFS_INFO_ATTR(feature, name)
  89. #define NILFS_FEATURE_RO_ATTR(name) \
  90. NILFS_RO_ATTR(feature, name)
  91. #define NILFS_FEATURE_RW_ATTR(name) \
  92. NILFS_RW_ATTR(feature, name)
  93. #define NILFS_DEV_INFO_ATTR(name) \
  94. NILFS_INFO_ATTR(dev, name)
  95. #define NILFS_DEV_RO_ATTR(name) \
  96. NILFS_RO_ATTR(dev, name)
  97. #define NILFS_DEV_RW_ATTR(name) \
  98. NILFS_RW_ATTR(dev, name)
  99. #define NILFS_SEGMENTS_RO_ATTR(name) \
  100. NILFS_RO_ATTR(segments, name)
  101. #define NILFS_SEGMENTS_RW_ATTR(name) \
  102. NILFS_RW_ATTR(segs_info, name)
  103. #define NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(name) \
  104. NILFS_RO_ATTR(mounted_snapshots, name)
  105. #define NILFS_CHECKPOINTS_RO_ATTR(name) \
  106. NILFS_RO_ATTR(checkpoints, name)
  107. #define NILFS_CHECKPOINTS_RW_ATTR(name) \
  108. NILFS_RW_ATTR(checkpoints, name)
  109. #define NILFS_SNAPSHOT_INFO_ATTR(name) \
  110. NILFS_INFO_ATTR(snapshot, name)
  111. #define NILFS_SNAPSHOT_RO_ATTR(name) \
  112. NILFS_RO_ATTR(snapshot, name)
  113. #define NILFS_SNAPSHOT_RW_ATTR(name) \
  114. NILFS_RW_ATTR(snapshot, name)
  115. #define NILFS_SUPERBLOCK_RO_ATTR(name) \
  116. NILFS_RO_ATTR(superblock, name)
  117. #define NILFS_SUPERBLOCK_RW_ATTR(name) \
  118. NILFS_RW_ATTR(superblock, name)
  119. #define NILFS_SEGCTOR_INFO_ATTR(name) \
  120. NILFS_INFO_ATTR(segctor, name)
  121. #define NILFS_SEGCTOR_RO_ATTR(name) \
  122. NILFS_RO_ATTR(segctor, name)
  123. #define NILFS_SEGCTOR_RW_ATTR(name) \
  124. NILFS_RW_ATTR(segctor, name)
  125. #define NILFS_FEATURE_ATTR_LIST(name) \
  126. (&nilfs_feature_attr_##name.attr)
  127. #define NILFS_DEV_ATTR_LIST(name) \
  128. (&nilfs_dev_attr_##name.attr)
  129. #define NILFS_SEGMENTS_ATTR_LIST(name) \
  130. (&nilfs_segments_attr_##name.attr)
  131. #define NILFS_MOUNTED_SNAPSHOTS_ATTR_LIST(name) \
  132. (&nilfs_mounted_snapshots_attr_##name.attr)
  133. #define NILFS_CHECKPOINTS_ATTR_LIST(name) \
  134. (&nilfs_checkpoints_attr_##name.attr)
  135. #define NILFS_SNAPSHOT_ATTR_LIST(name) \
  136. (&nilfs_snapshot_attr_##name.attr)
  137. #define NILFS_SUPERBLOCK_ATTR_LIST(name) \
  138. (&nilfs_superblock_attr_##name.attr)
  139. #define NILFS_SEGCTOR_ATTR_LIST(name) \
  140. (&nilfs_segctor_attr_##name.attr)
  141. #endif /* _NILFS_SYSFS_H */