Release 4.14 drivers/target/target_core_alua.h

Directory: drivers/target
/* 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 */
Overall Contributors
Person Tokens Prop Commits CommitProp
Nicholas Bellinger 580 79.56% 2 12.50%
Hannes Reinecke 121 16.60% 6 37.50%
Christoph Hellwig 24 3.29% 6 37.50%
Bart Van Assche 3 0.41% 1 6.25%
Greg Kroah-Hartman 1 0.14% 1 6.25%
Total 729 100.00% 16 100.00%
Directory: drivers/target

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Person	Tokens	Prop	Commits	CommitProp
Nicholas Bellinger	580	79.56%	2	12.50%
Hannes Reinecke	121	16.60%	6	37.50%
Christoph Hellwig	24	3.29%	6	37.50%
Bart Van Assche	3	0.41%	1	6.25%
Greg Kroah-Hartman	1	0.14%	1	6.25%
Total	729	100.00%	16	100.00%
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Release 4.14 drivers/target/target_core_alua.h

Overall Contributors
