de103c93af
Pass the sense reason as an explicit return value from the I/O submission
path instead of storing it in struct se_cmd and using negative return
values. This cleans up a lot of the code pathes, and with the sparse
annotations for the new sense_reason_t type allows for much better
error checking.
(nab: Convert spc_emulate_modesense + spc_emulate_modeselect to use
sense_reason_t with Roland's MODE SELECT changes)
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
137 lines
5.5 KiB
C
137 lines
5.5 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_IMPLICT_ALUA 0x10
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#define TPGS_EXPLICT_ALUA 0x20
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/*
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* ASYMMETRIC ACCESS STATE field
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*
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* from spc4r17 section 6.27 Table 245
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*/
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#define ALUA_ACCESS_STATE_ACTIVE_OPTMIZED 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_OFFLINE 0xe
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#define ALUA_ACCESS_STATE_TRANSITION 0xf
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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_EXPLICT_STPG 0x01
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#define ALUA_STATUS_ALTERED_BY_IMPLICT_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 implict and explict 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 implict 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_IMPLICT_TRANS_SECS 0
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#define ALUA_MAX_IMPLICT_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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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 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_implict_trans_secs(struct t10_alua_tg_pt_gp *,
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char *);
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extern ssize_t core_alua_store_implict_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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