features.h 3.5 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2. #ifndef _BCACHE_FEATURES_H
  3. #define _BCACHE_FEATURES_H
  4. #include <linux/bcache.h>
  5. #include <linux/kernel.h>
  6. #include <linux/types.h>
  7. #define BCH_FEATURE_COMPAT 0
  8. #define BCH_FEATURE_RO_COMPAT 1
  9. #define BCH_FEATURE_INCOMPAT 2
  10. #define BCH_FEATURE_TYPE_MASK 0x03
  11. /* Feature set definition */
  12. /* Incompat feature set */
  13. /* 32bit bucket size, obsoleted */
  14. #define BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET 0x0001
  15. /* real bucket size is (1 << bucket_size) */
  16. #define BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE 0x0002
  17. #define BCH_FEATURE_COMPAT_SUPP 0
  18. #define BCH_FEATURE_RO_COMPAT_SUPP 0
  19. #define BCH_FEATURE_INCOMPAT_SUPP (BCH_FEATURE_INCOMPAT_OBSO_LARGE_BUCKET| \
  20. BCH_FEATURE_INCOMPAT_LOG_LARGE_BUCKET_SIZE)
  21. #define BCH_HAS_COMPAT_FEATURE(sb, mask) \
  22. ((sb)->feature_compat & (mask))
  23. #define BCH_HAS_RO_COMPAT_FEATURE(sb, mask) \
  24. ((sb)->feature_ro_compat & (mask))
  25. #define BCH_HAS_INCOMPAT_FEATURE(sb, mask) \
  26. ((sb)->feature_incompat & (mask))
  27. #define BCH_FEATURE_COMPAT_FUNCS(name, flagname) \
  28. static inline int bch_has_feature_##name(struct cache_sb *sb) \
  29. { \
  30. if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
  31. return 0; \
  32. return (((sb)->feature_compat & \
  33. BCH##_FEATURE_COMPAT_##flagname) != 0); \
  34. } \
  35. static inline void bch_set_feature_##name(struct cache_sb *sb) \
  36. { \
  37. (sb)->feature_compat |= \
  38. BCH##_FEATURE_COMPAT_##flagname; \
  39. } \
  40. static inline void bch_clear_feature_##name(struct cache_sb *sb) \
  41. { \
  42. (sb)->feature_compat &= \
  43. ~BCH##_FEATURE_COMPAT_##flagname; \
  44. }
  45. #define BCH_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
  46. static inline int bch_has_feature_##name(struct cache_sb *sb) \
  47. { \
  48. if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
  49. return 0; \
  50. return (((sb)->feature_ro_compat & \
  51. BCH##_FEATURE_RO_COMPAT_##flagname) != 0); \
  52. } \
  53. static inline void bch_set_feature_##name(struct cache_sb *sb) \
  54. { \
  55. (sb)->feature_ro_compat |= \
  56. BCH##_FEATURE_RO_COMPAT_##flagname; \
  57. } \
  58. static inline void bch_clear_feature_##name(struct cache_sb *sb) \
  59. { \
  60. (sb)->feature_ro_compat &= \
  61. ~BCH##_FEATURE_RO_COMPAT_##flagname; \
  62. }
  63. #define BCH_FEATURE_INCOMPAT_FUNCS(name, flagname) \
  64. static inline int bch_has_feature_##name(struct cache_sb *sb) \
  65. { \
  66. if (sb->version < BCACHE_SB_VERSION_CDEV_WITH_FEATURES) \
  67. return 0; \
  68. return (((sb)->feature_incompat & \
  69. BCH##_FEATURE_INCOMPAT_##flagname) != 0); \
  70. } \
  71. static inline void bch_set_feature_##name(struct cache_sb *sb) \
  72. { \
  73. (sb)->feature_incompat |= \
  74. BCH##_FEATURE_INCOMPAT_##flagname; \
  75. } \
  76. static inline void bch_clear_feature_##name(struct cache_sb *sb) \
  77. { \
  78. (sb)->feature_incompat &= \
  79. ~BCH##_FEATURE_INCOMPAT_##flagname; \
  80. }
  81. BCH_FEATURE_INCOMPAT_FUNCS(obso_large_bucket, OBSO_LARGE_BUCKET);
  82. BCH_FEATURE_INCOMPAT_FUNCS(large_bucket, LOG_LARGE_BUCKET_SIZE);
  83. static inline bool bch_has_unknown_compat_features(struct cache_sb *sb)
  84. {
  85. return ((sb->feature_compat & ~BCH_FEATURE_COMPAT_SUPP) != 0);
  86. }
  87. static inline bool bch_has_unknown_ro_compat_features(struct cache_sb *sb)
  88. {
  89. return ((sb->feature_ro_compat & ~BCH_FEATURE_RO_COMPAT_SUPP) != 0);
  90. }
  91. static inline bool bch_has_unknown_incompat_features(struct cache_sb *sb)
  92. {
  93. return ((sb->feature_incompat & ~BCH_FEATURE_INCOMPAT_SUPP) != 0);
  94. }
  95. int bch_print_cache_set_feature_compat(struct cache_set *c, char *buf, int size);
  96. int bch_print_cache_set_feature_ro_compat(struct cache_set *c, char *buf, int size);
  97. int bch_print_cache_set_feature_incompat(struct cache_set *c, char *buf, int size);
  98. #endif