c66094bf32
Add infrastructure for referrals. v2 changes: - Fix unsigned long long division in core_alua_state_lba_dependent on 32-bit (Fengguang + Chen + Hannes) - Fix compile warning in core_alua_state_lba_dependent (nab) - Convert segment_* + sectors variables in core_alua_state_lba_dependent to u64 (Hannes) Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
154 lines
5.9 KiB
C
154 lines
5.9 KiB
C
#ifndef TARGET_CORE_ALUA_H
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#define TARGET_CORE_ALUA_H
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/*
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* INQUIRY response data, TPGS Field
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*
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* from spc4r17 section 6.4.2 Table 135
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*/
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#define TPGS_NO_ALUA 0x00
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#define TPGS_IMPLICIT_ALUA 0x10
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#define TPGS_EXPLICIT_ALUA 0x20
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/*
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* ASYMMETRIC ACCESS STATE field
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*
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* from spc4r36j section 6.37 Table 307
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*/
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#define ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED 0x0
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#define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1
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#define ALUA_ACCESS_STATE_STANDBY 0x2
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#define ALUA_ACCESS_STATE_UNAVAILABLE 0x3
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#define ALUA_ACCESS_STATE_LBA_DEPENDENT 0x4
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#define ALUA_ACCESS_STATE_OFFLINE 0xe
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#define ALUA_ACCESS_STATE_TRANSITION 0xf
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/*
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* from spc4r36j section 6.37 Table 306
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*/
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#define ALUA_T_SUP 0x80
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#define ALUA_O_SUP 0x40
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#define ALUA_LBD_SUP 0x10
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#define ALUA_U_SUP 0x08
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#define ALUA_S_SUP 0x04
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#define ALUA_AN_SUP 0x02
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#define ALUA_AO_SUP 0x01
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/*
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* REPORT_TARGET_PORT_GROUP STATUS CODE
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*
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* from spc4r17 section 6.27 Table 246
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*/
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#define ALUA_STATUS_NONE 0x00
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#define ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG 0x01
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#define ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA 0x02
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/*
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* From spc4r17, Table D.1: ASC and ASCQ Assignement
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*/
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#define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a
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#define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b
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#define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c
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#define ASCQ_04H_ALUA_OFFLINE 0x12
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/*
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* Used as the default for Active/NonOptimized delay (in milliseconds)
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* This can also be changed via configfs on a per target port group basis..
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*/
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#define ALUA_DEFAULT_NONOP_DELAY_MSECS 100
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#define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */
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/*
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* Used for implicit and explicit ALUA transitional delay, that is disabled
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* by default, and is intended to be used for debugging client side ALUA code.
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*/
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#define ALUA_DEFAULT_TRANS_DELAY_MSECS 0
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#define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */
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/*
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* Used for the recommended application client implicit transition timeout
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* in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header.
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*/
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#define ALUA_DEFAULT_IMPLICIT_TRANS_SECS 0
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#define ALUA_MAX_IMPLICIT_TRANS_SECS 255
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/*
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* Used by core_alua_update_tpg_primary_metadata() and
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* core_alua_update_tpg_secondary_metadata()
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*/
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#define ALUA_METADATA_PATH_LEN 512
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/*
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* Used by core_alua_update_tpg_secondary_metadata()
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*/
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#define ALUA_SECONDARY_METADATA_WWN_LEN 256
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/* Used by core_alua_update_tpg_(primary,secondary)_metadata */
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#define ALUA_MD_BUF_LEN 1024
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extern struct kmem_cache *t10_alua_lu_gp_cache;
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extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
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extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
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extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
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extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *);
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extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *);
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extern sense_reason_t target_emulate_report_referrals(struct se_cmd *);
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extern int core_alua_check_nonop_delay(struct se_cmd *);
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extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
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struct se_device *, struct se_port *,
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struct se_node_acl *, int, int);
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extern char *core_alua_dump_status(int);
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extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int);
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extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16);
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extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *);
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extern void core_alua_free_lu_gp_mem(struct se_device *);
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extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *);
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extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *);
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extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *,
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struct t10_alua_lu_gp *);
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extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
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struct t10_alua_lu_gp *);
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extern void core_alua_drop_lu_gp_dev(struct se_device *);
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extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
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struct se_device *, const char *, int);
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extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
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extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
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struct se_port *);
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extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
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extern void core_alua_free_tg_pt_gp_mem(struct se_port *);
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extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *,
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struct t10_alua_tg_pt_gp *);
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extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *);
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extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *,
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size_t);
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extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
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extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,
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const char *, size_t);
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extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
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char *);
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extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
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const char *, size_t);
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extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
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char *);
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extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
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const char *, size_t);
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extern ssize_t core_alua_show_implicit_trans_secs(struct t10_alua_tg_pt_gp *,
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char *);
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extern ssize_t core_alua_store_implicit_trans_secs(struct t10_alua_tg_pt_gp *,
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const char *, size_t);
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extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *,
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char *);
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extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *,
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const char *, size_t);
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extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *);
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extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *,
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size_t);
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extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *);
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extern ssize_t core_alua_store_secondary_status(struct se_lun *,
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const char *, size_t);
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extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
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char *);
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extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
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const char *, size_t);
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extern int core_setup_alua(struct se_device *);
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extern sense_reason_t target_alua_state_check(struct se_cmd *cmd);
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#endif /* TARGET_CORE_ALUA_H */
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