target_core_alua.h 6.0 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef TARGET_CORE_ALUA_H
  3. #define TARGET_CORE_ALUA_H
  4. #include <target/target_core_base.h>
  5. /*
  6. * INQUIRY response data, TPGS Field
  7. *
  8. * from spc4r17 section 6.4.2 Table 135
  9. */
  10. #define TPGS_NO_ALUA 0x00
  11. #define TPGS_IMPLICIT_ALUA 0x10
  12. #define TPGS_EXPLICIT_ALUA 0x20
  13. /*
  14. * ASYMMETRIC ACCESS STATE field
  15. *
  16. * from spc4r36j section 6.37 Table 307
  17. */
  18. #define ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED 0x0
  19. #define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1
  20. #define ALUA_ACCESS_STATE_STANDBY 0x2
  21. #define ALUA_ACCESS_STATE_UNAVAILABLE 0x3
  22. #define ALUA_ACCESS_STATE_LBA_DEPENDENT 0x4
  23. #define ALUA_ACCESS_STATE_OFFLINE 0xe
  24. #define ALUA_ACCESS_STATE_TRANSITION 0xf
  25. /*
  26. * from spc4r36j section 6.37 Table 306
  27. */
  28. #define ALUA_T_SUP 0x80
  29. #define ALUA_O_SUP 0x40
  30. #define ALUA_LBD_SUP 0x10
  31. #define ALUA_U_SUP 0x08
  32. #define ALUA_S_SUP 0x04
  33. #define ALUA_AN_SUP 0x02
  34. #define ALUA_AO_SUP 0x01
  35. /*
  36. * REPORT_TARGET_PORT_GROUP STATUS CODE
  37. *
  38. * from spc4r17 section 6.27 Table 246
  39. */
  40. #define ALUA_STATUS_NONE 0x00
  41. #define ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG 0x01
  42. #define ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA 0x02
  43. /*
  44. * From spc4r17, Table D.1: ASC and ASCQ Assignement
  45. */
  46. #define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a
  47. #define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b
  48. #define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c
  49. #define ASCQ_04H_ALUA_OFFLINE 0x12
  50. /*
  51. * Used as the default for Active/NonOptimized delay (in milliseconds)
  52. * This can also be changed via configfs on a per target port group basis..
  53. */
  54. #define ALUA_DEFAULT_NONOP_DELAY_MSECS 100
  55. #define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */
  56. /*
  57. * Used for implicit and explicit ALUA transitional delay, that is disabled
  58. * by default, and is intended to be used for debugging client side ALUA code.
  59. */
  60. #define ALUA_DEFAULT_TRANS_DELAY_MSECS 0
  61. #define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */
  62. /*
  63. * Used for the recommended application client implicit transition timeout
  64. * in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header.
  65. */
  66. #define ALUA_DEFAULT_IMPLICIT_TRANS_SECS 0
  67. #define ALUA_MAX_IMPLICIT_TRANS_SECS 255
  68. /* Used by core_alua_update_tpg_(primary,secondary)_metadata */
  69. #define ALUA_MD_BUF_LEN 1024
  70. extern struct kmem_cache *t10_alua_lu_gp_cache;
  71. extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
  72. extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
  73. extern struct kmem_cache *t10_alua_lba_map_cache;
  74. extern struct kmem_cache *t10_alua_lba_map_mem_cache;
  75. extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *);
  76. extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *);
  77. extern sense_reason_t target_emulate_report_referrals(struct se_cmd *);
  78. extern int core_alua_check_nonop_delay(struct se_cmd *);
  79. extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
  80. struct se_device *, struct se_lun *,
  81. struct se_node_acl *, int, int);
  82. extern char *core_alua_dump_status(int);
  83. extern struct t10_alua_lba_map *core_alua_allocate_lba_map(
  84. struct list_head *, u64, u64);
  85. extern int core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *, int, int);
  86. extern void core_alua_free_lba_map(struct list_head *);
  87. extern void core_alua_set_lba_map(struct se_device *, struct list_head *,
  88. int, int);
  89. extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int);
  90. extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16);
  91. extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *);
  92. extern void core_alua_free_lu_gp_mem(struct se_device *);
  93. extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *);
  94. extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *);
  95. extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *,
  96. struct t10_alua_lu_gp *);
  97. extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
  98. struct t10_alua_lu_gp *);
  99. extern void core_alua_drop_lu_gp_dev(struct se_device *);
  100. extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
  101. struct se_device *, const char *, int);
  102. extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
  103. extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
  104. extern void target_detach_tg_pt_gp(struct se_lun *);
  105. extern void target_attach_tg_pt_gp(struct se_lun *, struct t10_alua_tg_pt_gp *);
  106. extern ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *, char *);
  107. extern ssize_t core_alua_store_tg_pt_gp_info(struct se_lun *, const char *,
  108. size_t);
  109. extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
  110. extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,
  111. const char *, size_t);
  112. extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
  113. char *);
  114. extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
  115. const char *, size_t);
  116. extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
  117. char *);
  118. extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
  119. const char *, size_t);
  120. extern ssize_t core_alua_show_implicit_trans_secs(struct t10_alua_tg_pt_gp *,
  121. char *);
  122. extern ssize_t core_alua_store_implicit_trans_secs(struct t10_alua_tg_pt_gp *,
  123. const char *, size_t);
  124. extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *,
  125. char *);
  126. extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *,
  127. const char *, size_t);
  128. extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *);
  129. extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *,
  130. size_t);
  131. extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *);
  132. extern ssize_t core_alua_store_secondary_status(struct se_lun *,
  133. const char *, size_t);
  134. extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
  135. char *);
  136. extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
  137. const char *, size_t);
  138. extern int core_setup_alua(struct se_device *);
  139. extern sense_reason_t target_alua_state_check(struct se_cmd *cmd);
  140. #endif /* TARGET_CORE_ALUA_H */