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drivers/target/target_core_alua.h 4.98 KB
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c66ac9db8   Nicholas Bellinger   [SCSI] target: Ad... 
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  #ifndef TARGET_CORE_ALUA_H
  #define TARGET_CORE_ALUA_H
  
  /*
   * INQUIRY response data, TPGS Field
   *
   * from spc4r17 section 6.4.2 Table 135
   */
  #define TPGS_NO_ALUA				0x00
  #define TPGS_IMPLICT_ALUA			0x10
  #define TPGS_EXPLICT_ALUA			0x20
  
  /*
   * ASYMMETRIC ACCESS STATE field
   *
   * from spc4r17 section 6.27 Table 245
   */
  #define ALUA_ACCESS_STATE_ACTIVE_OPTMIZED	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_OFFLINE		0xe
  #define ALUA_ACCESS_STATE_TRANSITION		0xf
  
  /*
   * REPORT_TARGET_PORT_GROUP STATUS CODE
   *
   * from spc4r17 section 6.27 Table 246
   */
  #define ALUA_STATUS_NONE				0x00
  #define ALUA_STATUS_ALTERED_BY_EXPLICT_STPG		0x01
  #define ALUA_STATUS_ALTERED_BY_IMPLICT_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 implict and explict 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 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
  
  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_tg_pt_gp_mem_cache;
e76a35d6c   Christoph Hellwig   target: pass the ... 
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  extern int target_emulate_report_target_port_groups(struct se_task *);
  extern int target_emulate_set_target_port_groups(struct se_task *);
c66ac9db8   Nicholas Bellinger   [SCSI] target: Ad... 
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  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_port *,
  				struct se_node_acl *, int, int);
  extern char *core_alua_dump_status(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_subsystem_dev *, const char *, int);
  extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
  extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
  					struct se_port *);
  extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
  extern void core_alua_free_tg_pt_gp_mem(struct se_port *);
  extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *,
  					struct t10_alua_tg_pt_gp *);
  extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *);
  extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, 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_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 *, int);
  
  #endif /* TARGET_CORE_ALUA_H */