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 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 /* 27 * from spc4r36j section 6.37 Table 306 28 */ 29 #define ALUA_T_SUP 0x80 30 #define ALUA_O_SUP 0x40 31 #define ALUA_LBD_SUP 0x10 32 #define ALUA_U_SUP 0x08 33 #define ALUA_S_SUP 0x04 34 #define ALUA_AN_SUP 0x02 35 #define ALUA_AO_SUP 0x01 36 37 /* 38 * REPORT_TARGET_PORT_GROUP STATUS CODE 39 * 40 * from spc4r17 section 6.27 Table 246 41 */ 42 #define ALUA_STATUS_NONE 0x00 43 #define ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG 0x01 44 #define ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA 0x02 45 46 /* 47 * From spc4r17, Table D.1: ASC and ASCQ Assignement 48 */ 49 #define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a 50 #define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b 51 #define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c 52 #define ASCQ_04H_ALUA_OFFLINE 0x12 53 54 /* 55 * Used as the default for Active/NonOptimized delay (in milliseconds) 56 * This can also be changed via configfs on a per target port group basis.. 57 */ 58 #define ALUA_DEFAULT_NONOP_DELAY_MSECS 100 59 #define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */ 60 /* 61 * Used for implicit and explicit ALUA transitional delay, that is disabled 62 * by default, and is intended to be used for debugging client side ALUA code. 63 */ 64 #define ALUA_DEFAULT_TRANS_DELAY_MSECS 0 65 #define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */ 66 /* 67 * Used for the recommended application client implicit transition timeout 68 * in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header. 69 */ 70 #define ALUA_DEFAULT_IMPLICIT_TRANS_SECS 0 71 #define ALUA_MAX_IMPLICIT_TRANS_SECS 255 72 /* 73 * Used by core_alua_update_tpg_primary_metadata() and 74 * core_alua_update_tpg_secondary_metadata() 75 */ 76 #define ALUA_METADATA_PATH_LEN 512 77 /* 78 * Used by core_alua_update_tpg_secondary_metadata() 79 */ 80 #define ALUA_SECONDARY_METADATA_WWN_LEN 256 81 82 /* Used by core_alua_update_tpg_(primary,secondary)_metadata */ 83 #define ALUA_MD_BUF_LEN 1024 84 85 extern struct kmem_cache *t10_alua_lu_gp_cache; 86 extern struct kmem_cache *t10_alua_lu_gp_mem_cache; 87 extern struct kmem_cache *t10_alua_tg_pt_gp_cache; 88 extern struct kmem_cache *t10_alua_lba_map_cache; 89 extern struct kmem_cache *t10_alua_lba_map_mem_cache; 90 91 extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *); 92 extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *); 93 extern sense_reason_t target_emulate_report_referrals(struct se_cmd *); 94 extern int core_alua_check_nonop_delay(struct se_cmd *); 95 extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *, 96 struct se_device *, struct se_lun *, 97 struct se_node_acl *, int, int); 98 extern char *core_alua_dump_status(int); 99 extern struct t10_alua_lba_map *core_alua_allocate_lba_map( 100 struct list_head *, u64, u64); 101 extern int core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *, int, int); 102 extern void core_alua_free_lba_map(struct list_head *); 103 extern void core_alua_set_lba_map(struct se_device *, struct list_head *, 104 int, int); 105 extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int); 106 extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16); 107 extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *); 108 extern void core_alua_free_lu_gp_mem(struct se_device *); 109 extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *); 110 extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *); 111 extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *, 112 struct t10_alua_lu_gp *); 113 extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *, 114 struct t10_alua_lu_gp *); 115 extern void core_alua_drop_lu_gp_dev(struct se_device *); 116 extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp( 117 struct se_device *, const char *, int); 118 extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16); 119 extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *); 120 extern void target_detach_tg_pt_gp(struct se_lun *); 121 extern void target_attach_tg_pt_gp(struct se_lun *, struct t10_alua_tg_pt_gp *); 122 extern ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *, char *); 123 extern ssize_t core_alua_store_tg_pt_gp_info(struct se_lun *, const char *, 124 size_t); 125 extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *); 126 extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *, 127 const char *, size_t); 128 extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, 129 char *); 130 extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, 131 const char *, size_t); 132 extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *, 133 char *); 134 extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *, 135 const char *, size_t); 136 extern ssize_t core_alua_show_implicit_trans_secs(struct t10_alua_tg_pt_gp *, 137 char *); 138 extern ssize_t core_alua_store_implicit_trans_secs(struct t10_alua_tg_pt_gp *, 139 const char *, size_t); 140 extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *, 141 char *); 142 extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *, 143 const char *, size_t); 144 extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *); 145 extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *, 146 size_t); 147 extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *); 148 extern ssize_t core_alua_store_secondary_status(struct se_lun *, 149 const char *, size_t); 150 extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *, 151 char *); 152 extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *, 153 const char *, size_t); 154 extern int core_setup_alua(struct se_device *); 155 extern sense_reason_t target_alua_state_check(struct se_cmd *cmd); 156 157 #endif /* TARGET_CORE_ALUA_H */ 158