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-rw-r--r--drivers/target/target_core_alua.h126
1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/target/target_core_alua.h b/drivers/target/target_core_alua.h
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1#ifndef TARGET_CORE_ALUA_H
2#define TARGET_CORE_ALUA_H
3
4/*
5 * INQUIRY response data, TPGS Field
6 *
7 * from spc4r17 section 6.4.2 Table 135
8 */
9#define TPGS_NO_ALUA 0x00
10#define TPGS_IMPLICT_ALUA 0x10
11#define TPGS_EXPLICT_ALUA 0x20
12
13/*
14 * ASYMMETRIC ACCESS STATE field
15 *
16 * from spc4r17 section 6.27 Table 245
17 */
18#define ALUA_ACCESS_STATE_ACTIVE_OPTMIZED 0x0
19#define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1
20#define ALUA_ACCESS_STATE_STANDBY 0x2
21#define ALUA_ACCESS_STATE_UNAVAILABLE 0x3
22#define ALUA_ACCESS_STATE_OFFLINE 0xe
23#define ALUA_ACCESS_STATE_TRANSITION 0xf
24
25/*
26 * REPORT_TARGET_PORT_GROUP STATUS CODE
27 *
28 * from spc4r17 section 6.27 Table 246
29 */
30#define ALUA_STATUS_NONE 0x00
31#define ALUA_STATUS_ALTERED_BY_EXPLICT_STPG 0x01
32#define ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA 0x02
33
34/*
35 * From spc4r17, Table D.1: ASC and ASCQ Assignement
36 */
37#define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a
38#define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b
39#define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c
40#define ASCQ_04H_ALUA_OFFLINE 0x12
41
42/*
43 * Used as the default for Active/NonOptimized delay (in milliseconds)
44 * This can also be changed via configfs on a per target port group basis..
45 */
46#define ALUA_DEFAULT_NONOP_DELAY_MSECS 100
47#define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */
48/*
49 * Used for implict and explict ALUA transitional delay, that is disabled
50 * by default, and is intended to be used for debugging client side ALUA code.
51 */
52#define ALUA_DEFAULT_TRANS_DELAY_MSECS 0
53#define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */
54/*
55 * Used by core_alua_update_tpg_primary_metadata() and
56 * core_alua_update_tpg_secondary_metadata()
57 */
58#define ALUA_METADATA_PATH_LEN 512
59/*
60 * Used by core_alua_update_tpg_secondary_metadata()
61 */
62#define ALUA_SECONDARY_METADATA_WWN_LEN 256
63
64extern struct kmem_cache *t10_alua_lu_gp_cache;
65extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
66extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
67extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
68
69extern int core_emulate_report_target_port_groups(struct se_cmd *);
70extern int core_emulate_set_target_port_groups(struct se_cmd *);
71extern int core_alua_check_nonop_delay(struct se_cmd *);
72extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
73 struct se_device *, struct se_port *,
74 struct se_node_acl *, int, int);
75extern char *core_alua_dump_status(int);
76extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int);
77extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16);
78extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *);
79extern void core_alua_free_lu_gp_mem(struct se_device *);
80extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *);
81extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *);
82extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *,
83 struct t10_alua_lu_gp *);
84extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
85 struct t10_alua_lu_gp *);
86extern void core_alua_drop_lu_gp_dev(struct se_device *);
87extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
88 struct se_subsystem_dev *, const char *, int);
89extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
90extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
91 struct se_port *);
92extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
93extern void core_alua_free_tg_pt_gp_mem(struct se_port *);
94extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *,
95 struct t10_alua_tg_pt_gp *);
96extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *);
97extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *,
98 size_t);
99extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
100extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,
101 const char *, size_t);
102extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
103 char *);
104extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
105 const char *, size_t);
106extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
107 char *);
108extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
109 const char *, size_t);
110extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *,
111 char *);
112extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *,
113 const char *, size_t);
114extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *);
115extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *,
116 size_t);
117extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *);
118extern ssize_t core_alua_store_secondary_status(struct se_lun *,
119 const char *, size_t);
120extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
121 char *);
122extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
123 const char *, size_t);
124extern int core_setup_alua(struct se_device *, int);
125
126#endif /* TARGET_CORE_ALUA_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-26 21:22:54 -0500