1 #ifndef TARGET_CORE_FABRIC_H
2 #define TARGET_CORE_FABRIC_H
4 struct target_core_fabric_ops
{
7 struct configfs_subsystem
*tf_subsys
;
8 char *(*get_fabric_name
)(void);
9 u8 (*get_fabric_proto_ident
)(struct se_portal_group
*);
10 char *(*tpg_get_wwn
)(struct se_portal_group
*);
11 u16 (*tpg_get_tag
)(struct se_portal_group
*);
12 u32 (*tpg_get_default_depth
)(struct se_portal_group
*);
13 u32 (*tpg_get_pr_transport_id
)(struct se_portal_group
*,
15 struct t10_pr_registration
*, int *,
17 u32 (*tpg_get_pr_transport_id_len
)(struct se_portal_group
*,
19 struct t10_pr_registration
*, int *);
20 char *(*tpg_parse_pr_out_transport_id
)(struct se_portal_group
*,
21 const char *, u32
*, char **);
22 int (*tpg_check_demo_mode
)(struct se_portal_group
*);
23 int (*tpg_check_demo_mode_cache
)(struct se_portal_group
*);
24 int (*tpg_check_demo_mode_write_protect
)(struct se_portal_group
*);
25 int (*tpg_check_prod_mode_write_protect
)(struct se_portal_group
*);
27 * Optionally used by fabrics to allow demo-mode login, but not
28 * expose any TPG LUNs, and return 'not connected' in standard
31 int (*tpg_check_demo_mode_login_only
)(struct se_portal_group
*);
33 * Optionally used as a configfs tunable to determine when
34 * target-core should signal the PROTECT=1 feature bit for
35 * backends that don't support T10-PI, so that either fabric
36 * HW offload or target-core emulation performs the associated
37 * WRITE_STRIP and READ_INSERT operations.
39 int (*tpg_check_prot_fabric_only
)(struct se_portal_group
*);
40 struct se_node_acl
*(*tpg_alloc_fabric_acl
)(
41 struct se_portal_group
*);
42 void (*tpg_release_fabric_acl
)(struct se_portal_group
*,
43 struct se_node_acl
*);
44 u32 (*tpg_get_inst_index
)(struct se_portal_group
*);
46 * Optional to release struct se_cmd and fabric dependent allocated
47 * I/O descriptor in transport_cmd_check_stop().
49 * Returning 1 will signal a descriptor has been released.
50 * Returning 0 will signal a descriptor has not been released.
52 int (*check_stop_free
)(struct se_cmd
*);
53 void (*release_cmd
)(struct se_cmd
*);
54 void (*put_session
)(struct se_session
*);
56 * Called with spin_lock_bh(struct se_portal_group->session_lock held.
58 int (*shutdown_session
)(struct se_session
*);
59 void (*close_session
)(struct se_session
*);
60 u32 (*sess_get_index
)(struct se_session
*);
62 * Used only for SCSI fabrics that contain multi-value TransportIDs
63 * (like iSCSI). All other SCSI fabrics should set this to NULL.
65 u32 (*sess_get_initiator_sid
)(struct se_session
*,
66 unsigned char *, u32
);
67 int (*write_pending
)(struct se_cmd
*);
68 int (*write_pending_status
)(struct se_cmd
*);
69 void (*set_default_node_attributes
)(struct se_node_acl
*);
70 u32 (*get_task_tag
)(struct se_cmd
*);
71 int (*get_cmd_state
)(struct se_cmd
*);
72 int (*queue_data_in
)(struct se_cmd
*);
73 int (*queue_status
)(struct se_cmd
*);
74 void (*queue_tm_rsp
)(struct se_cmd
*);
75 void (*aborted_task
)(struct se_cmd
*);
77 * fabric module calls for target_core_fabric_configfs.c
79 struct se_wwn
*(*fabric_make_wwn
)(struct target_fabric_configfs
*,
80 struct config_group
*, const char *);
81 void (*fabric_drop_wwn
)(struct se_wwn
*);
82 struct se_portal_group
*(*fabric_make_tpg
)(struct se_wwn
*,
83 struct config_group
*, const char *);
84 void (*fabric_drop_tpg
)(struct se_portal_group
*);
85 int (*fabric_post_link
)(struct se_portal_group
*,
87 void (*fabric_pre_unlink
)(struct se_portal_group
*,
89 struct se_tpg_np
*(*fabric_make_np
)(struct se_portal_group
*,
90 struct config_group
*, const char *);
91 void (*fabric_drop_np
)(struct se_tpg_np
*);
92 struct se_node_acl
*(*fabric_make_nodeacl
)(struct se_portal_group
*,
93 struct config_group
*, const char *);
94 void (*fabric_drop_nodeacl
)(struct se_node_acl
*);
96 struct configfs_attribute
**tfc_discovery_attrs
;
97 struct configfs_attribute
**tfc_wwn_attrs
;
98 struct configfs_attribute
**tfc_tpg_base_attrs
;
99 struct configfs_attribute
**tfc_tpg_np_base_attrs
;
100 struct configfs_attribute
**tfc_tpg_attrib_attrs
;
101 struct configfs_attribute
**tfc_tpg_auth_attrs
;
102 struct configfs_attribute
**tfc_tpg_param_attrs
;
103 struct configfs_attribute
**tfc_tpg_nacl_base_attrs
;
104 struct configfs_attribute
**tfc_tpg_nacl_attrib_attrs
;
105 struct configfs_attribute
**tfc_tpg_nacl_auth_attrs
;
106 struct configfs_attribute
**tfc_tpg_nacl_param_attrs
;
109 int target_register_template(const struct target_core_fabric_ops
*fo
);
110 void target_unregister_template(const struct target_core_fabric_ops
*fo
);
112 struct se_session
*transport_init_session(enum target_prot_op
);
113 int transport_alloc_session_tags(struct se_session
*, unsigned int,
115 struct se_session
*transport_init_session_tags(unsigned int, unsigned int,
116 enum target_prot_op
);
117 void __transport_register_session(struct se_portal_group
*,
118 struct se_node_acl
*, struct se_session
*, void *);
119 void transport_register_session(struct se_portal_group
*,
120 struct se_node_acl
*, struct se_session
*, void *);
121 void target_get_session(struct se_session
*);
122 void target_put_session(struct se_session
*);
123 ssize_t
target_show_dynamic_sessions(struct se_portal_group
*, char *);
124 void transport_free_session(struct se_session
*);
125 void target_put_nacl(struct se_node_acl
*);
126 void transport_deregister_session_configfs(struct se_session
*);
127 void transport_deregister_session(struct se_session
*);
130 void transport_init_se_cmd(struct se_cmd
*,
131 const struct target_core_fabric_ops
*,
132 struct se_session
*, u32
, int, int, unsigned char *);
133 sense_reason_t
transport_lookup_cmd_lun(struct se_cmd
*, u32
);
134 sense_reason_t
target_setup_cmd_from_cdb(struct se_cmd
*, unsigned char *);
135 int target_submit_cmd_map_sgls(struct se_cmd
*, struct se_session
*,
136 unsigned char *, unsigned char *, u32
, u32
, int, int, int,
137 struct scatterlist
*, u32
, struct scatterlist
*, u32
,
138 struct scatterlist
*, u32
);
139 int target_submit_cmd(struct se_cmd
*, struct se_session
*, unsigned char *,
140 unsigned char *, u32
, u32
, int, int, int);
141 int target_submit_tmr(struct se_cmd
*se_cmd
, struct se_session
*se_sess
,
142 unsigned char *sense
, u32 unpacked_lun
,
143 void *fabric_tmr_ptr
, unsigned char tm_type
,
144 gfp_t
, unsigned int, int);
145 int transport_handle_cdb_direct(struct se_cmd
*);
146 sense_reason_t
transport_generic_new_cmd(struct se_cmd
*);
148 void target_execute_cmd(struct se_cmd
*cmd
);
150 int transport_generic_free_cmd(struct se_cmd
*, int);
152 bool transport_wait_for_tasks(struct se_cmd
*);
153 int transport_check_aborted_status(struct se_cmd
*, int);
154 int transport_send_check_condition_and_sense(struct se_cmd
*,
155 sense_reason_t
, int);
156 int target_get_sess_cmd(struct se_session
*, struct se_cmd
*, bool);
157 int target_put_sess_cmd(struct se_session
*, struct se_cmd
*);
158 void target_sess_cmd_list_set_waiting(struct se_session
*);
159 void target_wait_for_sess_cmds(struct se_session
*);
161 int core_alua_check_nonop_delay(struct se_cmd
*);
163 int core_tmr_alloc_req(struct se_cmd
*, void *, u8
, gfp_t
);
164 void core_tmr_release_req(struct se_tmr_req
*);
165 int transport_generic_handle_tmr(struct se_cmd
*);
166 void transport_generic_request_failure(struct se_cmd
*, sense_reason_t
);
167 void __target_execute_cmd(struct se_cmd
*);
168 int transport_lookup_tmr_lun(struct se_cmd
*, u32
);
170 struct se_node_acl
*core_tpg_get_initiator_node_acl(struct se_portal_group
*tpg
,
172 struct se_node_acl
*core_tpg_check_initiator_node_acl(struct se_portal_group
*,
174 void core_tpg_clear_object_luns(struct se_portal_group
*);
175 struct se_node_acl
*core_tpg_add_initiator_node_acl(struct se_portal_group
*,
176 struct se_node_acl
*, const char *, u32
);
177 int core_tpg_del_initiator_node_acl(struct se_portal_group
*,
178 struct se_node_acl
*, int);
179 int core_tpg_set_initiator_node_queue_depth(struct se_portal_group
*,
180 unsigned char *, u32
, int);
181 int core_tpg_set_initiator_node_tag(struct se_portal_group
*,
182 struct se_node_acl
*, const char *);
183 int core_tpg_register(const struct target_core_fabric_ops
*,
184 struct se_wwn
*, struct se_portal_group
*, void *, int);
185 int core_tpg_deregister(struct se_portal_group
*);
188 u8
sas_get_fabric_proto_ident(struct se_portal_group
*);
189 u32
sas_get_pr_transport_id(struct se_portal_group
*, struct se_node_acl
*,
190 struct t10_pr_registration
*, int *, unsigned char *);
191 u32
sas_get_pr_transport_id_len(struct se_portal_group
*, struct se_node_acl
*,
192 struct t10_pr_registration
*, int *);
193 char *sas_parse_pr_out_transport_id(struct se_portal_group
*, const char *,
197 u8
fc_get_fabric_proto_ident(struct se_portal_group
*);
198 u32
fc_get_pr_transport_id(struct se_portal_group
*, struct se_node_acl
*,
199 struct t10_pr_registration
*, int *, unsigned char *);
200 u32
fc_get_pr_transport_id_len(struct se_portal_group
*, struct se_node_acl
*,
201 struct t10_pr_registration
*, int *);
202 char *fc_parse_pr_out_transport_id(struct se_portal_group
*, const char *,
206 u8
iscsi_get_fabric_proto_ident(struct se_portal_group
*);
207 u32
iscsi_get_pr_transport_id(struct se_portal_group
*, struct se_node_acl
*,
208 struct t10_pr_registration
*, int *, unsigned char *);
209 u32
iscsi_get_pr_transport_id_len(struct se_portal_group
*, struct se_node_acl
*,
210 struct t10_pr_registration
*, int *);
211 char *iscsi_parse_pr_out_transport_id(struct se_portal_group
*, const char *,
215 * The LIO target core uses DMA_TO_DEVICE to mean that data is going
216 * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
217 * that data is coming from the target (eg handling a READ). However,
218 * this is just the opposite of what we have to tell the DMA mapping
219 * layer -- eg when handling a READ, the HBA will have to DMA the data
220 * out of memory so it can send it to the initiator, which means we
221 * need to use DMA_TO_DEVICE when we map the data.
223 static inline enum dma_data_direction
224 target_reverse_dma_direction(struct se_cmd
*se_cmd
)
226 if (se_cmd
->se_cmd_flags
& SCF_BIDI
)
227 return DMA_BIDIRECTIONAL
;
229 switch (se_cmd
->data_direction
) {
231 return DMA_FROM_DEVICE
;
232 case DMA_FROM_DEVICE
:
233 return DMA_TO_DEVICE
;
240 #endif /* TARGET_CORE_FABRICH */