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target_core_alua.h
137 lines (129 loc) · 5.48 KB
/
target_core_alua.h
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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 for the recommended application client implict transition timeout
* in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header.
*/
#define ALUA_DEFAULT_IMPLICT_TRANS_SECS 0
#define ALUA_MAX_IMPLICT_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
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;
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 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_device *, 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_implict_trans_secs(struct t10_alua_tg_pt_gp *,
char *);
extern ssize_t core_alua_store_implict_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 */