tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_IMPLICIT_ALUA 0x10
11#define TPGS_EXPLICIT_ALUA 0x20
12
13/*
14 * ASYMMETRIC ACCESS STATE field
15 *
16 * from spc4r36j section 6.37 Table 307
17 */
18#define ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED 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_LBA_DEPENDENT 0x4
23#define ALUA_ACCESS_STATE_OFFLINE 0xe
24#define ALUA_ACCESS_STATE_TRANSITION 0xf
25
26/*
27 * from spc4r36j section 6.37 Table 306
28 */
29#define ALUA_T_SUP 0x80
30#define ALUA_O_SUP 0x40
31#define ALUA_LBD_SUP 0x10
32#define ALUA_U_SUP 0x08
33#define ALUA_S_SUP 0x04
34#define ALUA_AN_SUP 0x02
35#define ALUA_AO_SUP 0x01
36
37/*
38 * REPORT_TARGET_PORT_GROUP STATUS CODE
39 *
40 * from spc4r17 section 6.27 Table 246
41 */
42#define ALUA_STATUS_NONE 0x00
43#define ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG 0x01
44#define ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA 0x02
45
46/*
47 * From spc4r17, Table D.1: ASC and ASCQ Assignement
48 */
49#define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a
50#define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b
51#define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c
52#define ASCQ_04H_ALUA_OFFLINE 0x12
53
54/*
55 * Used as the default for Active/NonOptimized delay (in milliseconds)
56 * This can also be changed via configfs on a per target port group basis..
57 */
58#define ALUA_DEFAULT_NONOP_DELAY_MSECS 100
59#define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */
60/*
61 * Used for implicit and explicit ALUA transitional delay, that is disabled
62 * by default, and is intended to be used for debugging client side ALUA code.
63 */
64#define ALUA_DEFAULT_TRANS_DELAY_MSECS 0
65#define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */
66/*
67 * Used for the recommended application client implicit transition timeout
68 * in seconds, returned by the REPORT_TARGET_PORT_GROUPS w/ extended header.
69 */
70#define ALUA_DEFAULT_IMPLICIT_TRANS_SECS 0
71#define ALUA_MAX_IMPLICIT_TRANS_SECS 255
72/*
73 * Used by core_alua_update_tpg_primary_metadata() and
74 * core_alua_update_tpg_secondary_metadata()
75 */
76#define ALUA_METADATA_PATH_LEN 512
77/*
78 * Used by core_alua_update_tpg_secondary_metadata()
79 */
80#define ALUA_SECONDARY_METADATA_WWN_LEN 256
81
82/* Used by core_alua_update_tpg_(primary,secondary)_metadata */
83#define ALUA_MD_BUF_LEN 1024
84
85extern struct kmem_cache *t10_alua_lu_gp_cache;
86extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
87extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
88extern struct kmem_cache *t10_alua_lba_map_cache;
89extern struct kmem_cache *t10_alua_lba_map_mem_cache;
90
91extern sense_reason_t target_emulate_report_target_port_groups(struct se_cmd *);
92extern sense_reason_t target_emulate_set_target_port_groups(struct se_cmd *);
93extern sense_reason_t target_emulate_report_referrals(struct se_cmd *);
94extern int core_alua_check_nonop_delay(struct se_cmd *);
95extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
96 struct se_device *, struct se_lun *,
97 struct se_node_acl *, int, int);
98extern char *core_alua_dump_status(int);
99extern struct t10_alua_lba_map *core_alua_allocate_lba_map(
100 struct list_head *, u64, u64);
101extern int core_alua_allocate_lba_map_mem(struct t10_alua_lba_map *, int, int);
102extern void core_alua_free_lba_map(struct list_head *);
103extern void core_alua_set_lba_map(struct se_device *, struct list_head *,
104 int, int);
105extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int);
106extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16);
107extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *);
108extern void core_alua_free_lu_gp_mem(struct se_device *);
109extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *);
110extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *);
111extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *,
112 struct t10_alua_lu_gp *);
113extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
114 struct t10_alua_lu_gp *);
115extern void core_alua_drop_lu_gp_dev(struct se_device *);
116extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
117 struct se_device *, const char *, int);
118extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
119extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
120extern void target_detach_tg_pt_gp(struct se_lun *);
121extern void target_attach_tg_pt_gp(struct se_lun *, struct t10_alua_tg_pt_gp *);
122extern ssize_t core_alua_show_tg_pt_gp_info(struct se_lun *, char *);
123extern ssize_t core_alua_store_tg_pt_gp_info(struct se_lun *, const char *,
124 size_t);
125extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
126extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,
127 const char *, size_t);
128extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
129 char *);
130extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
131 const char *, size_t);
132extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
133 char *);
134extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
135 const char *, size_t);
136extern ssize_t core_alua_show_implicit_trans_secs(struct t10_alua_tg_pt_gp *,
137 char *);
138extern ssize_t core_alua_store_implicit_trans_secs(struct t10_alua_tg_pt_gp *,
139 const char *, size_t);
140extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *,
141 char *);
142extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *,
143 const char *, size_t);
144extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *);
145extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *,
146 size_t);
147extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *);
148extern ssize_t core_alua_store_secondary_status(struct se_lun *,
149 const char *, size_t);
150extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
151 char *);
152extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
153 const char *, size_t);
154extern int core_setup_alua(struct se_device *);
155extern sense_reason_t target_alua_state_check(struct se_cmd *cmd);
156
157#endif /* TARGET_CORE_ALUA_H */