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