1 #ifndef TARGET_CORE_ALUA_H 2 #define TARGET_CORE_ALUA_H 3 4 #include <target/target_core_base.h> 5 6 /* 7 * INQUIRY response data, TPGS Field 8 * 9 * from spc4r17 section 6.4.2 Table 135 10 */ 11 #define TPGS_NO_ALUA 0x00 12 #define TPGS_IMPLICIT_ALUA 0x10 13 #define TPGS_EXPLICIT_ALUA 0x20 14 15 /* 16 * ASYMMETRIC ACCESS STATE field 17 * 18 * from spc4r36j section 6.37 Table 307 19 */ 20 #define ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED 0x0 21 #define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1 22 #define ALUA_ACCESS_STATE_STANDBY 0x2 23 #define ALUA_ACCESS_STATE_UNAVAILABLE 0x3 24 #define ALUA_ACCESS_STATE_LBA_DEPENDENT 0x4 25 #define ALUA_ACCESS_STATE_OFFLINE 0xe 26 #define ALUA_ACCESS_STATE_TRANSITION 0xf 27 28 /* 29 * from spc4r36j section 6.37 Table 306 30 */ 31 #define ALUA_T_SUP 0x80 32 #define ALUA_O_SUP 0x40 33 #define ALUA_LBD_SUP 0x10 34 #define ALUA_U_SUP 0x08 35 #define ALUA_S_SUP 0x04 36 #define ALUA_AN_SUP 0x02 37 #define ALUA_AO_SUP 0x01 38 39 /* 40 * REPORT_TARGET_PORT_GROUP STATUS CODE 41 * 42 * from spc4r17 section 6.27 Table 246 43 */ 44 #define ALUA_STATUS_NONE 0x00 45 #define ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG 0x01 46 #define ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA 0x02 47 48 /* 49 * From spc4r17, Table D.1: ASC and ASCQ Assignement 50 */ 51 #define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a 52 #define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b 53 #define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c 54 #define ASCQ_04H_ALUA_OFFLINE 0x12 55 56 /* 57 * Used as the default for Active/NonOptimized delay (in milliseconds) 58 * This can also be changed via configfs on a per target port group basis.. 59 */ 60 #define ALUA_DEFAULT_NONOP_DELAY_MSECS 100 61 #define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */ 62 /* 63 * Used for implicit and explicit ALUA transitional delay, that is disabled 64 * by default, and is intended to be used for debugging client side ALUA code. 65 */ 66 #define ALUA_DEFAULT_TRANS_DELAY_MSECS 0 67 #define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */ 68 /* 69 * Used for the recommended application client implicit transition timeout 70 * in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header. 71 */ 72 #define ALUA_DEFAULT_IMPLICIT_TRANS_SECS 0 73 #define ALUA_MAX_IMPLICIT_TRANS_SECS 255 74 /* 75 * Used by core_alua_update_tpg_primary_metadata() and 76 * core_alua_update_tpg_secondary_metadata() 77 */ 78 #define ALUA_METADATA_PATH_LEN 512 79 /* 80 * Used by core_alua_update_tpg_secondary_metadata() 81 */ 82 #define ALUA_SECONDARY_METADATA_WWN_LEN 256 83 84 /* Used by core_alua_update_tpg_(primary,secondary)_metadata */ 85 #define ALUA_MD_BUF_LEN 1024 86 87 extern struct kmem_cache *t10_alua_lu_gp_cache; 88 extern struct kmem_cache *t10_alua_lu_gp_mem_cache; 89 extern struct kmem_cache *t10_alua_tg_pt_gp_cache; 90 extern struct kmem_cache *t10_alua_lba_map_cache; 91 extern struct kmem_cache *t10_alua_lba_map_mem_cache; 92 93 extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *); 94 extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *); 95 extern sense_reason_t target_emulate_report_referrals(struct se_cmd *); 96 extern int core_alua_check_nonop_delay(struct se_cmd *); 97 extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *, 98 struct se_device *, struct se_lun *, 99 struct se_node_acl *, int, int); 100 extern char *core_alua_dump_status(int); 101 extern struct t10_alua_lba_map *core_alua_allocate_lba_map( 102 struct list_head *, u64, u64); 103 extern int core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *, int, int); 104 extern void core_alua_free_lba_map(struct list_head *); 105 extern void core_alua_set_lba_map(struct se_device *, struct list_head *, 106 int, int); 107 extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int); 108 extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16); 109 extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *); 110 extern void core_alua_free_lu_gp_mem(struct se_device *); 111 extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *); 112 extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *); 113 extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *, 114 struct t10_alua_lu_gp *); 115 extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *, 116 struct t10_alua_lu_gp *); 117 extern void core_alua_drop_lu_gp_dev(struct se_device *); 118 extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp( 119 struct se_device *, const char *, int); 120 extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16); 121 extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *); 122 extern void target_detach_tg_pt_gp(struct se_lun *); 123 extern void target_attach_tg_pt_gp(struct se_lun *, struct t10_alua_tg_pt_gp *); 124 extern ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *, char *); 125 extern ssize_t core_alua_store_tg_pt_gp_info(struct se_lun *, const char *, 126 size_t); 127 extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *); 128 extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *, 129 const char *, size_t); 130 extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, 131 char *); 132 extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, 133 const char *, size_t); 134 extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *, 135 char *); 136 extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *, 137 const char *, size_t); 138 extern ssize_t core_alua_show_implicit_trans_secs(struct t10_alua_tg_pt_gp *, 139 char *); 140 extern ssize_t core_alua_store_implicit_trans_secs(struct t10_alua_tg_pt_gp *, 141 const char *, size_t); 142 extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *, 143 char *); 144 extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *, 145 const char *, size_t); 146 extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *); 147 extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *, 148 size_t); 149 extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *); 150 extern ssize_t core_alua_store_secondary_status(struct se_lun *, 151 const char *, size_t); 152 extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *, 153 char *); 154 extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *, 155 const char *, size_t); 156 extern int core_setup_alua(struct se_device *); 157 extern sense_reason_t target_alua_state_check(struct se_cmd *cmd); 158 159 #endif /* TARGET_CORE_ALUA_H */ 160