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1#ifndef TARGET_CORE_FABRIC_H
2#define TARGET_CORE_FABRIC_H
3
4struct 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 *,
12 struct se_node_acl *,
13 struct t10_pr_registration *, int *,
14 unsigned char *);
15 u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
16 struct se_node_acl *,
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 *);
24 /*
25 * Optionally used by fabrics to allow demo-mode login, but not
26 * expose any TPG LUNs, and return 'not connected' in standard
27 * inquiry response
28 */
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 *);
35 /*
36 * Optional to release struct se_cmd and fabric dependent allocated
37 * I/O descriptor in transport_cmd_check_stop().
38 *
39 * Returning 1 will signal a descriptor has been released.
40 * Returning 0 will signal a descriptor has not been released.
41 */
42 int (*check_stop_free)(struct se_cmd *);
43 void (*release_cmd)(struct se_cmd *);
44 void (*put_session)(struct se_session *);
45 /*
46 * Called with spin_lock_bh(struct se_portal_group->session_lock held.
47 */
48 int (*shutdown_session)(struct se_session *);
49 void (*close_session)(struct se_session *);
50 u32 (*sess_get_index)(struct se_session *);
51 /*
52 * Used only for SCSI fabrics that contain multi-value TransportIDs
53 * (like iSCSI). All other SCSI fabrics should set this to NULL.
54 */
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 *);
65 void (*aborted_task)(struct se_cmd *);
66 /*
67 * fabric module calls for target_core_fabric_configfs.c
68 */
69 struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
70 struct config_group *, const char *);
71 void (*fabric_drop_wwn)(struct se_wwn *);
72 struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
73 struct config_group *, const char *);
74 void (*fabric_drop_tpg)(struct se_portal_group *);
75 int (*fabric_post_link)(struct se_portal_group *,
76 struct se_lun *);
77 void (*fabric_pre_unlink)(struct se_portal_group *,
78 struct se_lun *);
79 struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
80 struct config_group *, const char *);
81 void (*fabric_drop_np)(struct se_tpg_np *);
82 struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
83 struct config_group *, const char *);
84 void (*fabric_drop_nodeacl)(struct se_node_acl *);
85};
86
87struct se_session *transport_init_session(enum target_prot_op);
88int transport_alloc_session_tags(struct se_session *, unsigned int,
89 unsigned int);
90struct se_session *transport_init_session_tags(unsigned int, unsigned int,
91 enum target_prot_op);
92void __transport_register_session(struct se_portal_group *,
93 struct se_node_acl *, struct se_session *, void *);
94void transport_register_session(struct se_portal_group *,
95 struct se_node_acl *, struct se_session *, void *);
96void target_get_session(struct se_session *);
97void target_put_session(struct se_session *);
98void transport_free_session(struct se_session *);
99void target_put_nacl(struct se_node_acl *);
100void transport_deregister_session_configfs(struct se_session *);
101void transport_deregister_session(struct se_session *);
102
103
104void transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
105 struct se_session *, u32, int, int, unsigned char *);
106sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
107sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
108int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
109 unsigned char *, unsigned char *, u32, u32, int, int, int,
110 struct scatterlist *, u32, struct scatterlist *, u32,
111 struct scatterlist *, u32);
112int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
113 unsigned char *, u32, u32, int, int, int);
114int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
115 unsigned char *sense, u32 unpacked_lun,
116 void *fabric_tmr_ptr, unsigned char tm_type,
117 gfp_t, unsigned int, int);
118int transport_handle_cdb_direct(struct se_cmd *);
119sense_reason_t transport_generic_new_cmd(struct se_cmd *);
120
121void target_execute_cmd(struct se_cmd *cmd);
122
123int transport_generic_free_cmd(struct se_cmd *, int);
124
125bool transport_wait_for_tasks(struct se_cmd *);
126int transport_check_aborted_status(struct se_cmd *, int);
127int transport_send_check_condition_and_sense(struct se_cmd *,
128 sense_reason_t, int);
129int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
130int target_put_sess_cmd(struct se_session *, struct se_cmd *);
131void target_sess_cmd_list_set_waiting(struct se_session *);
132void target_wait_for_sess_cmds(struct se_session *);
133
134int core_alua_check_nonop_delay(struct se_cmd *);
135
136int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
137void core_tmr_release_req(struct se_tmr_req *);
138int transport_generic_handle_tmr(struct se_cmd *);
139void transport_generic_request_failure(struct se_cmd *, sense_reason_t);
140void __target_execute_cmd(struct se_cmd *);
141int transport_lookup_tmr_lun(struct se_cmd *, u32);
142
143struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
144 unsigned char *);
145struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
146 unsigned char *);
147void core_tpg_clear_object_luns(struct se_portal_group *);
148struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *,
149 struct se_node_acl *, const char *, u32);
150int core_tpg_del_initiator_node_acl(struct se_portal_group *,
151 struct se_node_acl *, int);
152int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
153 unsigned char *, u32, int);
154int core_tpg_set_initiator_node_tag(struct se_portal_group *,
155 struct se_node_acl *, const char *);
156int core_tpg_register(struct target_core_fabric_ops *, struct se_wwn *,
157 struct se_portal_group *, void *, int);
158int core_tpg_deregister(struct se_portal_group *);
159
160/* SAS helpers */
161u8 sas_get_fabric_proto_ident(struct se_portal_group *);
162u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
163 struct t10_pr_registration *, int *, unsigned char *);
164u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
165 struct t10_pr_registration *, int *);
166char *sas_parse_pr_out_transport_id(struct se_portal_group *, const char *,
167 u32 *, char **);
168
169/* FC helpers */
170u8 fc_get_fabric_proto_ident(struct se_portal_group *);
171u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
172 struct t10_pr_registration *, int *, unsigned char *);
173u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
174 struct t10_pr_registration *, int *);
175char *fc_parse_pr_out_transport_id(struct se_portal_group *, const char *,
176 u32 *, char **);
177
178/* iSCSI helpers */
179u8 iscsi_get_fabric_proto_ident(struct se_portal_group *);
180u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
181 struct t10_pr_registration *, int *, unsigned char *);
182u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
183 struct t10_pr_registration *, int *);
184char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *,
185 u32 *, char **);
186
187/*
188 * The LIO target core uses DMA_TO_DEVICE to mean that data is going
189 * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
190 * that data is coming from the target (eg handling a READ). However,
191 * this is just the opposite of what we have to tell the DMA mapping
192 * layer -- eg when handling a READ, the HBA will have to DMA the data
193 * out of memory so it can send it to the initiator, which means we
194 * need to use DMA_TO_DEVICE when we map the data.
195 */
196static inline enum dma_data_direction
197target_reverse_dma_direction(struct se_cmd *se_cmd)
198{
199 if (se_cmd->se_cmd_flags & SCF_BIDI)
200 return DMA_BIDIRECTIONAL;
201
202 switch (se_cmd->data_direction) {
203 case DMA_TO_DEVICE:
204 return DMA_FROM_DEVICE;
205 case DMA_FROM_DEVICE:
206 return DMA_TO_DEVICE;
207 case DMA_NONE:
208 default:
209 return DMA_NONE;
210 }
211}
212
213#endif /* TARGET_CORE_FABRICH */
1#ifndef TARGET_CORE_FABRIC_H
2#define TARGET_CORE_FABRIC_H
3
4struct 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 *,
12 struct se_node_acl *,
13 struct t10_pr_registration *, int *,
14 unsigned char *);
15 u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
16 struct se_node_acl *,
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 *);
24 /*
25 * Optionally used by fabrics to allow demo-mode login, but not
26 * expose any TPG LUNs, and return 'not connected' in standard
27 * inquiry response
28 */
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 *);
35 /*
36 * Optional function pointer for TCM to perform command map
37 * from TCM processing thread context, for those struct se_cmd
38 * initially allocated in interrupt context.
39 */
40 int (*new_cmd_map)(struct se_cmd *);
41 /*
42 * Optional to release struct se_cmd and fabric dependent allocated
43 * I/O descriptor in transport_cmd_check_stop().
44 *
45 * Returning 1 will signal a descriptor has been released.
46 * Returning 0 will signal a descriptor has not been released.
47 */
48 int (*check_stop_free)(struct se_cmd *);
49 void (*release_cmd)(struct se_cmd *);
50 void (*put_session)(struct se_session *);
51 /*
52 * Called with spin_lock_bh(struct se_portal_group->session_lock held.
53 */
54 int (*shutdown_session)(struct se_session *);
55 void (*close_session)(struct se_session *);
56 u32 (*sess_get_index)(struct se_session *);
57 /*
58 * Used only for SCSI fabrics that contain multi-value TransportIDs
59 * (like iSCSI). All other SCSI fabrics should set this to NULL.
60 */
61 u32 (*sess_get_initiator_sid)(struct se_session *,
62 unsigned char *, u32);
63 int (*write_pending)(struct se_cmd *);
64 int (*write_pending_status)(struct se_cmd *);
65 void (*set_default_node_attributes)(struct se_node_acl *);
66 u32 (*get_task_tag)(struct se_cmd *);
67 int (*get_cmd_state)(struct se_cmd *);
68 int (*queue_data_in)(struct se_cmd *);
69 int (*queue_status)(struct se_cmd *);
70 int (*queue_tm_rsp)(struct se_cmd *);
71 u16 (*set_fabric_sense_len)(struct se_cmd *, u32);
72 u16 (*get_fabric_sense_len)(void);
73 /*
74 * fabric module calls for target_core_fabric_configfs.c
75 */
76 struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
77 struct config_group *, const char *);
78 void (*fabric_drop_wwn)(struct se_wwn *);
79 struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
80 struct config_group *, const char *);
81 void (*fabric_drop_tpg)(struct se_portal_group *);
82 int (*fabric_post_link)(struct se_portal_group *,
83 struct se_lun *);
84 void (*fabric_pre_unlink)(struct se_portal_group *,
85 struct se_lun *);
86 struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
87 struct config_group *, const char *);
88 void (*fabric_drop_np)(struct se_tpg_np *);
89 struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
90 struct config_group *, const char *);
91 void (*fabric_drop_nodeacl)(struct se_node_acl *);
92};
93
94struct se_session *transport_init_session(void);
95void __transport_register_session(struct se_portal_group *,
96 struct se_node_acl *, struct se_session *, void *);
97void transport_register_session(struct se_portal_group *,
98 struct se_node_acl *, struct se_session *, void *);
99void target_get_session(struct se_session *);
100void target_put_session(struct se_session *);
101void transport_free_session(struct se_session *);
102void target_put_nacl(struct se_node_acl *);
103void transport_deregister_session_configfs(struct se_session *);
104void transport_deregister_session(struct se_session *);
105
106
107void transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
108 struct se_session *, u32, int, int, unsigned char *);
109int transport_lookup_cmd_lun(struct se_cmd *, u32);
110int target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
111void target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
112 unsigned char *, u32, u32, int, int, int);
113int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
114 unsigned char *sense, u32 unpacked_lun,
115 void *fabric_tmr_ptr, unsigned char tm_type,
116 gfp_t, unsigned int, int);
117int transport_handle_cdb_direct(struct se_cmd *);
118int transport_generic_handle_cdb_map(struct se_cmd *);
119int transport_generic_handle_data(struct se_cmd *);
120int transport_generic_map_mem_to_cmd(struct se_cmd *cmd,
121 struct scatterlist *, u32, struct scatterlist *, u32);
122int transport_generic_new_cmd(struct se_cmd *);
123
124void transport_generic_process_write(struct se_cmd *);
125
126void transport_generic_free_cmd(struct se_cmd *, int);
127
128bool transport_wait_for_tasks(struct se_cmd *);
129int transport_check_aborted_status(struct se_cmd *, int);
130int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
131
132void target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
133int target_put_sess_cmd(struct se_session *, struct se_cmd *);
134void target_splice_sess_cmd_list(struct se_session *);
135void target_wait_for_sess_cmds(struct se_session *, int);
136
137int core_alua_check_nonop_delay(struct se_cmd *);
138
139int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
140void core_tmr_release_req(struct se_tmr_req *);
141int transport_generic_handle_tmr(struct se_cmd *);
142void transport_generic_request_failure(struct se_cmd *);
143int transport_lookup_tmr_lun(struct se_cmd *, u32);
144
145struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
146 unsigned char *);
147void core_tpg_clear_object_luns(struct se_portal_group *);
148struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *,
149 struct se_node_acl *, const char *, u32);
150int core_tpg_del_initiator_node_acl(struct se_portal_group *,
151 struct se_node_acl *, int);
152int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
153 unsigned char *, u32, int);
154int core_tpg_register(struct target_core_fabric_ops *, struct se_wwn *,
155 struct se_portal_group *, void *, int);
156int core_tpg_deregister(struct se_portal_group *);
157
158/* SAS helpers */
159u8 sas_get_fabric_proto_ident(struct se_portal_group *);
160u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
161 struct t10_pr_registration *, int *, unsigned char *);
162u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
163 struct t10_pr_registration *, int *);
164char *sas_parse_pr_out_transport_id(struct se_portal_group *, const char *,
165 u32 *, char **);
166
167/* FC helpers */
168u8 fc_get_fabric_proto_ident(struct se_portal_group *);
169u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
170 struct t10_pr_registration *, int *, unsigned char *);
171u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
172 struct t10_pr_registration *, int *);
173char *fc_parse_pr_out_transport_id(struct se_portal_group *, const char *,
174 u32 *, char **);
175
176/* iSCSI helpers */
177u8 iscsi_get_fabric_proto_ident(struct se_portal_group *);
178u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
179 struct t10_pr_registration *, int *, unsigned char *);
180u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
181 struct t10_pr_registration *, int *);
182char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *,
183 u32 *, char **);
184
185#endif /* TARGET_CORE_FABRICH */