1 #ifndef TARGET_CORE_ALUA_H 2 #define TARGET_CORE_ALUA_H 3 4 /* 5 * INQUIRY response data, TPGS Field 6 * 7 * from spc4r17 section 6.4.2 Table 135 8 */ 9 #define TPGS_NO_ALUA 0x00 10 #define TPGS_IMPLICIT_ALUA 0x10 11 #define TPGS_EXPLICIT_ALUA 0x20 12 13 /* 14 * ASYMMETRIC ACCESS STATE field 15 * 16 * from spc4r17 section 6.27 Table 245 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_OFFLINE 0xe 23 #define ALUA_ACCESS_STATE_TRANSITION 0xf 24 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 /* 37 * REPORT_TARGET_PORT_GROUP STATUS CODE 38 * 39 * from spc4r17 section 6.27 Table 246 40 */ 41 #define ALUA_STATUS_NONE 0x00 42 #define ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG 0x01 43 #define ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA 0x02 44 45 /* 46 * From spc4r17, Table D.1: ASC and ASCQ Assignement 47 */ 48 #define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a 49 #define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b 50 #define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c 51 #define ASCQ_04H_ALUA_OFFLINE 0x12 52 53 /* 54 * Used as the default for Active/NonOptimized delay (in milliseconds) 55 * This can also be changed via configfs on a per target port group basis.. 56 */ 57 #define ALUA_DEFAULT_NONOP_DELAY_MSECS 100 58 #define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */ 59 /* 60 * Used for implicit and explicit ALUA transitional delay, that is disabled 61 * by default, and is intended to be used for debugging client side ALUA code. 62 */ 63 #define ALUA_DEFAULT_TRANS_DELAY_MSECS 0 64 #define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */ 65 /* 66 * Used for the recommended application client implicit transition timeout 67 * in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header. 68 */ 69 #define ALUA_DEFAULT_IMPLICIT_TRANS_SECS 0 70 #define ALUA_MAX_IMPLICIT_TRANS_SECS 255 71 /* 72 * Used by core_alua_update_tpg_primary_metadata() and 73 * core_alua_update_tpg_secondary_metadata() 74 */ 75 #define ALUA_METADATA_PATH_LEN 512 76 /* 77 * Used by core_alua_update_tpg_secondary_metadata() 78 */ 79 #define ALUA_SECONDARY_METADATA_WWN_LEN 256 80 81 /* Used by core_alua_update_tpg_(primary,secondary)_metadata */ 82 #define ALUA_MD_BUF_LEN 1024 83 84 extern struct kmem_cache *t10_alua_lu_gp_cache; 85 extern struct kmem_cache *t10_alua_lu_gp_mem_cache; 86 extern struct kmem_cache *t10_alua_tg_pt_gp_cache; 87 extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; 88 89 extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *); 90 extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *); 91 extern int core_alua_check_nonop_delay(struct se_cmd *); 92 extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *, 93 struct se_device *, struct se_port *, 94 struct se_node_acl *, int, int); 95 extern char *core_alua_dump_status(int); 96 extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int); 97 extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16); 98 extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *); 99 extern void core_alua_free_lu_gp_mem(struct se_device *); 100 extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *); 101 extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *); 102 extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *, 103 struct t10_alua_lu_gp *); 104 extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *, 105 struct t10_alua_lu_gp *); 106 extern void core_alua_drop_lu_gp_dev(struct se_device *); 107 extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp( 108 struct se_device *, const char *, int); 109 extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16); 110 extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem( 111 struct se_port *); 112 extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *); 113 extern void core_alua_free_tg_pt_gp_mem(struct se_port *); 114 extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *, 115 struct t10_alua_tg_pt_gp *); 116 extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *); 117 extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *, 118 size_t); 119 extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *); 120 extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *, 121 const char *, size_t); 122 extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, 123 char *); 124 extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, 125 const char *, size_t); 126 extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *, 127 char *); 128 extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *, 129 const char *, size_t); 130 extern ssize_t core_alua_show_implicit_trans_secs(struct t10_alua_tg_pt_gp *, 131 char *); 132 extern ssize_t core_alua_store_implicit_trans_secs(struct t10_alua_tg_pt_gp *, 133 const char *, size_t); 134 extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *, 135 char *); 136 extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *, 137 const char *, size_t); 138 extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *); 139 extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *, 140 size_t); 141 extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *); 142 extern ssize_t core_alua_store_secondary_status(struct se_lun *, 143 const char *, size_t); 144 extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *, 145 char *); 146 extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *, 147 const char *, size_t); 148 extern int core_setup_alua(struct se_device *); 149 extern sense_reason_t target_alua_state_check(struct se_cmd *cmd); 150 151 #endif /* TARGET_CORE_ALUA_H */ 152