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 *);
65 void (*aborted_task)(struct se_cmd *);
67 * fabric module calls for target_core_fabric_configfs.c
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 *,
77 void (*fabric_pre_unlink)(struct se_portal_group *,
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 *);
87 struct se_session *transport_init_session(void);
88 int transport_alloc_session_tags(struct se_session *, unsigned int,
90 struct se_session *transport_init_session_tags(unsigned int, unsigned int);
91 void __transport_register_session(struct se_portal_group *,
92 struct se_node_acl *, struct se_session *, void *);
93 void transport_register_session(struct se_portal_group *,
94 struct se_node_acl *, struct se_session *, void *);
95 void target_get_session(struct se_session *);
96 void target_put_session(struct se_session *);
97 void transport_free_session(struct se_session *);
98 void target_put_nacl(struct se_node_acl *);
99 void transport_deregister_session_configfs(struct se_session *);
100 void transport_deregister_session(struct se_session *);
103 void transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
104 struct se_session *, u32, int, int, unsigned char *);
105 sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
106 sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
107 int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
108 unsigned char *, unsigned char *, u32, u32, int, int, int,
109 struct scatterlist *, u32, struct scatterlist *, u32,
110 struct scatterlist *, u32);
111 int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
112 unsigned char *, u32, u32, int, int, int);
113 int 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);
117 int transport_handle_cdb_direct(struct se_cmd *);
118 sense_reason_t transport_generic_new_cmd(struct se_cmd *);
120 void target_execute_cmd(struct se_cmd *cmd);
122 int transport_generic_free_cmd(struct se_cmd *, int);
124 bool transport_wait_for_tasks(struct se_cmd *);
125 int transport_check_aborted_status(struct se_cmd *, int);
126 int transport_send_check_condition_and_sense(struct se_cmd *,
127 sense_reason_t, int);
128 int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
129 int target_put_sess_cmd(struct se_session *, struct se_cmd *);
130 void target_sess_cmd_list_set_waiting(struct se_session *);
131 void target_wait_for_sess_cmds(struct se_session *);
133 int core_alua_check_nonop_delay(struct se_cmd *);
135 int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
136 void core_tmr_release_req(struct se_tmr_req *);
137 int transport_generic_handle_tmr(struct se_cmd *);
138 void transport_generic_request_failure(struct se_cmd *, sense_reason_t);
139 void __target_execute_cmd(struct se_cmd *);
140 int transport_lookup_tmr_lun(struct se_cmd *, u32);
142 struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
144 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
146 void core_tpg_clear_object_luns(struct se_portal_group *);
147 struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *,
148 struct se_node_acl *, const char *, u32);
149 int core_tpg_del_initiator_node_acl(struct se_portal_group *,
150 struct se_node_acl *, int);
151 int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
152 unsigned char *, u32, int);
153 int core_tpg_set_initiator_node_tag(struct se_portal_group *,
154 struct se_node_acl *, const char *);
155 int core_tpg_register(struct target_core_fabric_ops *, struct se_wwn *,
156 struct se_portal_group *, void *, int);
157 int core_tpg_deregister(struct se_portal_group *);
160 u8 sas_get_fabric_proto_ident(struct se_portal_group *);
161 u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
162 struct t10_pr_registration *, int *, unsigned char *);
163 u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
164 struct t10_pr_registration *, int *);
165 char *sas_parse_pr_out_transport_id(struct se_portal_group *, const char *,
169 u8 fc_get_fabric_proto_ident(struct se_portal_group *);
170 u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
171 struct t10_pr_registration *, int *, unsigned char *);
172 u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
173 struct t10_pr_registration *, int *);
174 char *fc_parse_pr_out_transport_id(struct se_portal_group *, const char *,
178 u8 iscsi_get_fabric_proto_ident(struct se_portal_group *);
179 u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
180 struct t10_pr_registration *, int *, unsigned char *);
181 u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
182 struct t10_pr_registration *, int *);
183 char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *,
187 * The LIO target core uses DMA_TO_DEVICE to mean that data is going
188 * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
189 * that data is coming from the target (eg handling a READ). However,
190 * this is just the opposite of what we have to tell the DMA mapping
191 * layer -- eg when handling a READ, the HBA will have to DMA the data
192 * out of memory so it can send it to the initiator, which means we
193 * need to use DMA_TO_DEVICE when we map the data.
195 static inline enum dma_data_direction
196 target_reverse_dma_direction(struct se_cmd *se_cmd)
198 if (se_cmd->se_cmd_flags & SCF_BIDI)
199 return DMA_BIDIRECTIONAL;
201 switch (se_cmd->data_direction) {
203 return DMA_FROM_DEVICE;
204 case DMA_FROM_DEVICE:
205 return DMA_TO_DEVICE;
212 #endif /* TARGET_CORE_FABRICH */