Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Open Menu / drivers / target / target_core_alua.h
Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/* 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,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 */