1 #ifndef TARGET_CORE_FABRIC_H
2 #define TARGET_CORE_FABRIC_H
4 struct target_core_fabric_ops
{
5 struct configfs_subsystem
*tf_subsys
;
6 char *(*get_fabric_name
)(void);
7 u8 (*get_fabric_proto_ident
)(struct se_portal_group
*);
8 char *(*tpg_get_wwn
)(struct se_portal_group
*);
9 u16 (*tpg_get_tag
)(struct se_portal_group
*);
10 u32 (*tpg_get_default_depth
)(struct se_portal_group
*);
11 u32 (*tpg_get_pr_transport_id
)(struct se_portal_group
*,
13 struct t10_pr_registration
*, int *,
15 u32 (*tpg_get_pr_transport_id_len
)(struct se_portal_group
*,
17 struct t10_pr_registration
*, int *);
18 char *(*tpg_parse_pr_out_transport_id
)(struct se_portal_group
*,
19 const char *, u32
*, char **);
20 int (*tpg_check_demo_mode
)(struct se_portal_group
*);
21 int (*tpg_check_demo_mode_cache
)(struct se_portal_group
*);
22 int (*tpg_check_demo_mode_write_protect
)(struct se_portal_group
*);
23 int (*tpg_check_prod_mode_write_protect
)(struct se_portal_group
*);
25 * Optionally used by fabrics to allow demo-mode login, but not
26 * expose any TPG LUNs, and return 'not connected' in standard
29 int (*tpg_check_demo_mode_login_only
)(struct se_portal_group
*);
30 struct se_node_acl
*(*tpg_alloc_fabric_acl
)(
31 struct se_portal_group
*);
32 void (*tpg_release_fabric_acl
)(struct se_portal_group
*,
33 struct se_node_acl
*);
34 u32 (*tpg_get_inst_index
)(struct se_portal_group
*);
36 * Optional to release struct se_cmd and fabric dependent allocated
37 * I/O descriptor in transport_cmd_check_stop().
39 * Returning 1 will signal a descriptor has been released.
40 * Returning 0 will signal a descriptor has not been released.
42 int (*check_stop_free
)(struct se_cmd
*);
43 void (*release_cmd
)(struct se_cmd
*);
44 void (*put_session
)(struct se_session
*);
46 * Called with spin_lock_bh(struct se_portal_group->session_lock held.
48 int (*shutdown_session
)(struct se_session
*);
49 void (*close_session
)(struct se_session
*);
50 u32 (*sess_get_index
)(struct se_session
*);
52 * Used only for SCSI fabrics that contain multi-value TransportIDs
53 * (like iSCSI). All other SCSI fabrics should set this to NULL.
55 u32 (*sess_get_initiator_sid
)(struct se_session
*,
56 unsigned char *, u32
);
57 int (*write_pending
)(struct se_cmd
*);
58 int (*write_pending_status
)(struct se_cmd
*);
59 void (*set_default_node_attributes
)(struct se_node_acl
*);
60 u32 (*get_task_tag
)(struct se_cmd
*);
61 int (*get_cmd_state
)(struct se_cmd
*);
62 int (*queue_data_in
)(struct se_cmd
*);
63 int (*queue_status
)(struct se_cmd
*);
64 void (*queue_tm_rsp
)(struct se_cmd
*);
66 * fabric module calls for target_core_fabric_configfs.c
68 struct se_wwn
*(*fabric_make_wwn
)(struct target_fabric_configfs
*,
69 struct config_group
*, const char *);
70 void (*fabric_drop_wwn
)(struct se_wwn
*);
71 struct se_portal_group
*(*fabric_make_tpg
)(struct se_wwn
*,
72 struct config_group
*, const char *);
73 void (*fabric_drop_tpg
)(struct se_portal_group
*);
74 int (*fabric_post_link
)(struct se_portal_group
*,
76 void (*fabric_pre_unlink
)(struct se_portal_group
*,
78 struct se_tpg_np
*(*fabric_make_np
)(struct se_portal_group
*,
79 struct config_group
*, const char *);
80 void (*fabric_drop_np
)(struct se_tpg_np
*);
81 struct se_node_acl
*(*fabric_make_nodeacl
)(struct se_portal_group
*,
82 struct config_group
*, const char *);
83 void (*fabric_drop_nodeacl
)(struct se_node_acl
*);
86 struct se_session
*transport_init_session(void);
87 int transport_alloc_session_tags(struct se_session
*, unsigned int,
89 struct se_session
*transport_init_session_tags(unsigned int, unsigned int);
90 void __transport_register_session(struct se_portal_group
*,
91 struct se_node_acl
*, struct se_session
*, void *);
92 void transport_register_session(struct se_portal_group
*,
93 struct se_node_acl
*, struct se_session
*, void *);
94 void target_get_session(struct se_session
*);
95 void target_put_session(struct se_session
*);
96 void transport_free_session(struct se_session
*);
97 void target_put_nacl(struct se_node_acl
*);
98 void transport_deregister_session_configfs(struct se_session
*);
99 void transport_deregister_session(struct se_session
*);
102 void transport_init_se_cmd(struct se_cmd
*, struct target_core_fabric_ops
*,
103 struct se_session
*, u32
, int, int, unsigned char *);
104 sense_reason_t
transport_lookup_cmd_lun(struct se_cmd
*, u32
);
105 sense_reason_t
target_setup_cmd_from_cdb(struct se_cmd
*, unsigned char *);
106 int target_submit_cmd_map_sgls(struct se_cmd
*, struct se_session
*,
107 unsigned char *, unsigned char *, u32
, u32
, int, int, int,
108 struct scatterlist
*, u32
, struct scatterlist
*, u32
,
109 struct scatterlist
*, u32
);
110 int target_submit_cmd(struct se_cmd
*, struct se_session
*, unsigned char *,
111 unsigned char *, u32
, u32
, int, int, int);
112 int target_submit_tmr(struct se_cmd
*se_cmd
, struct se_session
*se_sess
,
113 unsigned char *sense
, u32 unpacked_lun
,
114 void *fabric_tmr_ptr
, unsigned char tm_type
,
115 gfp_t
, unsigned int, int);
116 int transport_handle_cdb_direct(struct se_cmd
*);
117 sense_reason_t
transport_generic_new_cmd(struct se_cmd
*);
119 void target_execute_cmd(struct se_cmd
*cmd
);
121 int transport_generic_free_cmd(struct se_cmd
*, int);
123 bool transport_wait_for_tasks(struct se_cmd
*);
124 int transport_check_aborted_status(struct se_cmd
*, int);
125 int transport_send_check_condition_and_sense(struct se_cmd
*,
126 sense_reason_t
, int);
127 int target_get_sess_cmd(struct se_session
*, struct se_cmd
*, bool);
128 int target_put_sess_cmd(struct se_session
*, struct se_cmd
*);
129 void target_sess_cmd_list_set_waiting(struct se_session
*);
130 void target_wait_for_sess_cmds(struct se_session
*);
132 int core_alua_check_nonop_delay(struct se_cmd
*);
134 int core_tmr_alloc_req(struct se_cmd
*, void *, u8
, gfp_t
);
135 void core_tmr_release_req(struct se_tmr_req
*);
136 int transport_generic_handle_tmr(struct se_cmd
*);
137 void transport_generic_request_failure(struct se_cmd
*, sense_reason_t
);
138 void __target_execute_cmd(struct se_cmd
*);
139 int transport_lookup_tmr_lun(struct se_cmd
*, u32
);
141 struct se_node_acl
*core_tpg_get_initiator_node_acl(struct se_portal_group
*tpg
,
143 struct se_node_acl
*core_tpg_check_initiator_node_acl(struct se_portal_group
*,
145 void core_tpg_clear_object_luns(struct se_portal_group
*);
146 struct se_node_acl
*core_tpg_add_initiator_node_acl(struct se_portal_group
*,
147 struct se_node_acl
*, const char *, u32
);
148 int core_tpg_del_initiator_node_acl(struct se_portal_group
*,
149 struct se_node_acl
*, int);
150 int core_tpg_set_initiator_node_queue_depth(struct se_portal_group
*,
151 unsigned char *, u32
, int);
152 int core_tpg_set_initiator_node_tag(struct se_portal_group
*,
153 struct se_node_acl
*, const char *);
154 int core_tpg_register(struct target_core_fabric_ops
*, struct se_wwn
*,
155 struct se_portal_group
*, void *, int);
156 int core_tpg_deregister(struct se_portal_group
*);
159 u8
sas_get_fabric_proto_ident(struct se_portal_group
*);
160 u32
sas_get_pr_transport_id(struct se_portal_group
*, struct se_node_acl
*,
161 struct t10_pr_registration
*, int *, unsigned char *);
162 u32
sas_get_pr_transport_id_len(struct se_portal_group
*, struct se_node_acl
*,
163 struct t10_pr_registration
*, int *);
164 char *sas_parse_pr_out_transport_id(struct se_portal_group
*, const char *,
168 u8
fc_get_fabric_proto_ident(struct se_portal_group
*);
169 u32
fc_get_pr_transport_id(struct se_portal_group
*, struct se_node_acl
*,
170 struct t10_pr_registration
*, int *, unsigned char *);
171 u32
fc_get_pr_transport_id_len(struct se_portal_group
*, struct se_node_acl
*,
172 struct t10_pr_registration
*, int *);
173 char *fc_parse_pr_out_transport_id(struct se_portal_group
*, const char *,
177 u8
iscsi_get_fabric_proto_ident(struct se_portal_group
*);
178 u32
iscsi_get_pr_transport_id(struct se_portal_group
*, struct se_node_acl
*,
179 struct t10_pr_registration
*, int *, unsigned char *);
180 u32
iscsi_get_pr_transport_id_len(struct se_portal_group
*, struct se_node_acl
*,
181 struct t10_pr_registration
*, int *);
182 char *iscsi_parse_pr_out_transport_id(struct se_portal_group
*, const char *,
186 * The LIO target core uses DMA_TO_DEVICE to mean that data is going
187 * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
188 * that data is coming from the target (eg handling a READ). However,
189 * this is just the opposite of what we have to tell the DMA mapping
190 * layer -- eg when handling a READ, the HBA will have to DMA the data
191 * out of memory so it can send it to the initiator, which means we
192 * need to use DMA_TO_DEVICE when we map the data.
194 static inline enum dma_data_direction
195 target_reverse_dma_direction(struct se_cmd
*se_cmd
)
197 if (se_cmd
->se_cmd_flags
& SCF_BIDI
)
198 return DMA_BIDIRECTIONAL
;
200 switch (se_cmd
->data_direction
) {
202 return DMA_FROM_DEVICE
;
203 case DMA_FROM_DEVICE
:
204 return DMA_TO_DEVICE
;
211 #endif /* TARGET_CORE_FABRICH */