| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef TARGET_CORE_ALUA_H |
| #define TARGET_CORE_ALUA_H |
| |
| #include <target/target_core_base.h> |
| |
| /* |
| * INQUIRY response data, TPGS Field |
| * |
| * from spc4r17 section 6.4.2 Table 135 |
| */ |
| #define TPGS_NO_ALUA 0x00 |
| #define TPGS_IMPLICIT_ALUA 0x10 |
| #define TPGS_EXPLICIT_ALUA 0x20 |
| |
| /* |
| * ASYMMETRIC ACCESS STATE field |
| * |
| * from spc4r36j section 6.37 Table 307 |
| */ |
| #define ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED 0x0 |
| #define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1 |
| #define ALUA_ACCESS_STATE_STANDBY 0x2 |
| #define ALUA_ACCESS_STATE_UNAVAILABLE 0x3 |
| #define ALUA_ACCESS_STATE_LBA_DEPENDENT 0x4 |
| #define ALUA_ACCESS_STATE_OFFLINE 0xe |
| #define ALUA_ACCESS_STATE_TRANSITION 0xf |
| |
| /* |
| * from spc4r36j section 6.37 Table 306 |
| */ |
| #define ALUA_T_SUP 0x80 |
| #define ALUA_O_SUP 0x40 |
| #define ALUA_LBD_SUP 0x10 |
| #define ALUA_U_SUP 0x08 |
| #define ALUA_S_SUP 0x04 |
| #define ALUA_AN_SUP 0x02 |
| #define ALUA_AO_SUP 0x01 |
| |
| /* |
| * REPORT_TARGET_PORT_GROUP STATUS CODE |
| * |
| * from spc4r17 section 6.27 Table 246 |
| */ |
| #define ALUA_STATUS_NONE 0x00 |
| #define ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG 0x01 |
| #define ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA 0x02 |
| |
| /* |
| * From spc4r17, Table D.1: ASC and ASCQ Assignement |
| */ |
| #define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a |
| #define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b |
| #define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c |
| #define ASCQ_04H_ALUA_OFFLINE 0x12 |
| |
| /* |
| * Used as the default for Active/NonOptimized delay (in milliseconds) |
| * This can also be changed via configfs on a per target port group basis.. |
| */ |
| #define ALUA_DEFAULT_NONOP_DELAY_MSECS 100 |
| #define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */ |
| /* |
| * Used for implicit and explicit ALUA transitional delay, that is disabled |
| * by default, and is intended to be used for debugging client side ALUA code. |
| */ |
| #define ALUA_DEFAULT_TRANS_DELAY_MSECS 0 |
| #define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */ |
| /* |
| * Used for the recommended application client implicit transition timeout |
| * in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header. |
| */ |
| #define ALUA_DEFAULT_IMPLICIT_TRANS_SECS 0 |
| #define ALUA_MAX_IMPLICIT_TRANS_SECS 255 |
| /* |
| * Used by core_alua_update_tpg_primary_metadata() and |
| * core_alua_update_tpg_secondary_metadata() |
| */ |
| #define ALUA_METADATA_PATH_LEN 512 |
| /* |
| * Used by core_alua_update_tpg_secondary_metadata() |
| */ |
| #define ALUA_SECONDARY_METADATA_WWN_LEN 256 |
| |
| /* Used by core_alua_update_tpg_(primary,secondary)_metadata */ |
| #define ALUA_MD_BUF_LEN 1024 |
| |
| extern struct kmem_cache *t10_alua_lu_gp_cache; |
| extern struct kmem_cache *t10_alua_lu_gp_mem_cache; |
| extern struct kmem_cache *t10_alua_tg_pt_gp_cache; |
| extern struct kmem_cache *t10_alua_lba_map_cache; |
| extern struct kmem_cache *t10_alua_lba_map_mem_cache; |
| |
| extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *); |
| extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *); |
| extern sense_reason_t target_emulate_report_referrals(struct se_cmd *); |
| extern int core_alua_check_nonop_delay(struct se_cmd *); |
| extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *, |
| struct se_device *, struct se_lun *, |
| struct se_node_acl *, int, int); |
| extern char *core_alua_dump_status(int); |
| extern struct t10_alua_lba_map *core_alua_allocate_lba_map( |
| struct list_head *, u64, u64); |
| extern int core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *, int, int); |
| extern void core_alua_free_lba_map(struct list_head *); |
| extern void core_alua_set_lba_map(struct se_device *, struct list_head *, |
| int, int); |
| extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int); |
| extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16); |
| extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *); |
| extern void core_alua_free_lu_gp_mem(struct se_device *); |
| extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *); |
| extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *); |
| extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *, |
| struct t10_alua_lu_gp *); |
| extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *, |
| struct t10_alua_lu_gp *); |
| extern void core_alua_drop_lu_gp_dev(struct se_device *); |
| extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp( |
| struct se_device *, const char *, int); |
| extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16); |
| extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *); |
| extern void target_detach_tg_pt_gp(struct se_lun *); |
| extern void target_attach_tg_pt_gp(struct se_lun *, struct t10_alua_tg_pt_gp *); |
| extern ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *, char *); |
| extern ssize_t core_alua_store_tg_pt_gp_info(struct se_lun *, const char *, |
| size_t); |
| extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *); |
| extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *, |
| const char *, size_t); |
| extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, |
| char *); |
| extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, |
| const char *, size_t); |
| extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *, |
| char *); |
| extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *, |
| const char *, size_t); |
| extern ssize_t core_alua_show_implicit_trans_secs(struct t10_alua_tg_pt_gp *, |
| char *); |
| extern ssize_t core_alua_store_implicit_trans_secs(struct t10_alua_tg_pt_gp *, |
| const char *, size_t); |
| extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *, |
| char *); |
| extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *, |
| const char *, size_t); |
| extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *); |
| extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *, |
| size_t); |
| extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *); |
| extern ssize_t core_alua_store_secondary_status(struct se_lun *, |
| const char *, size_t); |
| extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *, |
| char *); |
| extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *, |
| const char *, size_t); |
| extern int core_setup_alua(struct se_device *); |
| extern sense_reason_t target_alua_state_check(struct se_cmd *cmd); |
| |
| #endif /* TARGET_CORE_ALUA_H */ |
