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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 | ||
64 | extern struct kmem_cache *t10_alua_lu_gp_cache; | |
65 | extern struct kmem_cache *t10_alua_lu_gp_mem_cache; | |
66 | extern struct kmem_cache *t10_alua_tg_pt_gp_cache; | |
67 | extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache; | |
68 | ||
69 | extern int core_emulate_report_target_port_groups(struct se_cmd *); | |
70 | extern int core_emulate_set_target_port_groups(struct se_cmd *); | |
71 | extern int core_alua_check_nonop_delay(struct se_cmd *); | |
72 | extern 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); | |
75 | extern char *core_alua_dump_status(int); | |
76 | extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int); | |
77 | extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16); | |
78 | extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *); | |
79 | extern void core_alua_free_lu_gp_mem(struct se_device *); | |
80 | extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *); | |
81 | extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *); | |
82 | extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *, | |
83 | struct t10_alua_lu_gp *); | |
84 | extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *, | |
85 | struct t10_alua_lu_gp *); | |
86 | extern void core_alua_drop_lu_gp_dev(struct se_device *); | |
87 | extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp( | |
88 | struct se_subsystem_dev *, const char *, int); | |
89 | extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16); | |
90 | extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem( | |
91 | struct se_port *); | |
92 | extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *); | |
93 | extern void core_alua_free_tg_pt_gp_mem(struct se_port *); | |
94 | extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *, | |
95 | struct t10_alua_tg_pt_gp *); | |
96 | extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *); | |
97 | extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *, | |
98 | size_t); | |
99 | extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *); | |
100 | extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *, | |
101 | const char *, size_t); | |
102 | extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, | |
103 | char *); | |
104 | extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *, | |
105 | const char *, size_t); | |
106 | extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *, | |
107 | char *); | |
108 | extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *, | |
109 | const char *, size_t); | |
110 | extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *, | |
111 | char *); | |
112 | extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *, | |
113 | const char *, size_t); | |
114 | extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *); | |
115 | extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *, | |
116 | size_t); | |
117 | extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *); | |
118 | extern ssize_t core_alua_store_secondary_status(struct se_lun *, | |
119 | const char *, size_t); | |
120 | extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *, | |
121 | char *); | |
122 | extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *, | |
123 | const char *, size_t); | |
124 | extern int core_setup_alua(struct se_device *, int); | |
125 | ||
126 | #endif /* TARGET_CORE_ALUA_H */ |