1 #ifndef TARGET_CORE_FABRIC_H
2 #define TARGET_CORE_FABRIC_H
4 struct target_core_fabric_ops {
8 char *(*get_fabric_name)(void);
9 char *(*tpg_get_wwn)(struct se_portal_group *);
10 u16 (*tpg_get_tag)(struct se_portal_group *);
11 u32 (*tpg_get_default_depth)(struct se_portal_group *);
12 int (*tpg_check_demo_mode)(struct se_portal_group *);
13 int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
14 int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
15 int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *);
17 * Optionally used by fabrics to allow demo-mode login, but not
18 * expose any TPG LUNs, and return 'not connected' in standard
21 int (*tpg_check_demo_mode_login_only)(struct se_portal_group *);
23 * Optionally used as a configfs tunable to determine when
24 * target-core should signal the PROTECT=1 feature bit for
25 * backends that don't support T10-PI, so that either fabric
26 * HW offload or target-core emulation performs the associated
27 * WRITE_STRIP and READ_INSERT operations.
29 int (*tpg_check_prot_fabric_only)(struct se_portal_group *);
30 u32 (*tpg_get_inst_index)(struct se_portal_group *);
32 * Optional to release struct se_cmd and fabric dependent allocated
33 * I/O descriptor in transport_cmd_check_stop().
35 * Returning 1 will signal a descriptor has been released.
36 * Returning 0 will signal a descriptor has not been released.
38 int (*check_stop_free)(struct se_cmd *);
39 void (*release_cmd)(struct se_cmd *);
40 void (*put_session)(struct se_session *);
42 * Called with spin_lock_bh(struct se_portal_group->session_lock held.
44 int (*shutdown_session)(struct se_session *);
45 void (*close_session)(struct se_session *);
46 u32 (*sess_get_index)(struct se_session *);
48 * Used only for SCSI fabrics that contain multi-value TransportIDs
49 * (like iSCSI). All other SCSI fabrics should set this to NULL.
51 u32 (*sess_get_initiator_sid)(struct se_session *,
52 unsigned char *, u32);
53 int (*write_pending)(struct se_cmd *);
54 int (*write_pending_status)(struct se_cmd *);
55 void (*set_default_node_attributes)(struct se_node_acl *);
56 int (*get_cmd_state)(struct se_cmd *);
57 int (*queue_data_in)(struct se_cmd *);
58 int (*queue_status)(struct se_cmd *);
59 void (*queue_tm_rsp)(struct se_cmd *);
60 void (*aborted_task)(struct se_cmd *);
62 * fabric module calls for target_core_fabric_configfs.c
64 struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
65 struct config_group *, const char *);
66 void (*fabric_drop_wwn)(struct se_wwn *);
67 struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
68 struct config_group *, const char *);
69 void (*fabric_drop_tpg)(struct se_portal_group *);
70 int (*fabric_post_link)(struct se_portal_group *,
72 void (*fabric_pre_unlink)(struct se_portal_group *,
74 struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
75 struct config_group *, const char *);
76 void (*fabric_drop_np)(struct se_tpg_np *);
77 int (*fabric_init_nodeacl)(struct se_node_acl *, const char *);
78 void (*fabric_cleanup_nodeacl)(struct se_node_acl *);
80 struct configfs_attribute **tfc_discovery_attrs;
81 struct configfs_attribute **tfc_wwn_attrs;
82 struct configfs_attribute **tfc_tpg_base_attrs;
83 struct configfs_attribute **tfc_tpg_np_base_attrs;
84 struct configfs_attribute **tfc_tpg_attrib_attrs;
85 struct configfs_attribute **tfc_tpg_auth_attrs;
86 struct configfs_attribute **tfc_tpg_param_attrs;
87 struct configfs_attribute **tfc_tpg_nacl_base_attrs;
88 struct configfs_attribute **tfc_tpg_nacl_attrib_attrs;
89 struct configfs_attribute **tfc_tpg_nacl_auth_attrs;
90 struct configfs_attribute **tfc_tpg_nacl_param_attrs;
93 int target_register_template(const struct target_core_fabric_ops *fo);
94 void target_unregister_template(const struct target_core_fabric_ops *fo);
96 int target_depend_item(struct config_item *item);
97 void target_undepend_item(struct config_item *item);
99 struct se_session *transport_init_session(enum target_prot_op);
100 int transport_alloc_session_tags(struct se_session *, unsigned int,
102 struct se_session *transport_init_session_tags(unsigned int, unsigned int,
103 enum target_prot_op);
104 void __transport_register_session(struct se_portal_group *,
105 struct se_node_acl *, struct se_session *, void *);
106 void transport_register_session(struct se_portal_group *,
107 struct se_node_acl *, struct se_session *, void *);
108 void target_get_session(struct se_session *);
109 void target_put_session(struct se_session *);
110 ssize_t target_show_dynamic_sessions(struct se_portal_group *, char *);
111 void transport_free_session(struct se_session *);
112 void target_put_nacl(struct se_node_acl *);
113 void transport_deregister_session_configfs(struct se_session *);
114 void transport_deregister_session(struct se_session *);
117 void transport_init_se_cmd(struct se_cmd *,
118 const struct target_core_fabric_ops *,
119 struct se_session *, u32, int, int, unsigned char *);
120 sense_reason_t transport_lookup_cmd_lun(struct se_cmd *, u32);
121 sense_reason_t target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
122 int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
123 unsigned char *, unsigned char *, u32, u32, int, int, int,
124 struct scatterlist *, u32, struct scatterlist *, u32,
125 struct scatterlist *, u32);
126 int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
127 unsigned char *, u32, u32, int, int, int);
128 int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
129 unsigned char *sense, u32 unpacked_lun,
130 void *fabric_tmr_ptr, unsigned char tm_type,
131 gfp_t, unsigned int, int);
132 int transport_handle_cdb_direct(struct se_cmd *);
133 sense_reason_t transport_generic_new_cmd(struct se_cmd *);
135 void target_execute_cmd(struct se_cmd *cmd);
137 int transport_generic_free_cmd(struct se_cmd *, int);
139 bool transport_wait_for_tasks(struct se_cmd *);
140 int transport_check_aborted_status(struct se_cmd *, int);
141 int transport_send_check_condition_and_sense(struct se_cmd *,
142 sense_reason_t, int);
143 int target_get_sess_cmd(struct se_cmd *, bool);
144 int target_put_sess_cmd(struct se_cmd *);
145 void target_sess_cmd_list_set_waiting(struct se_session *);
146 void target_wait_for_sess_cmds(struct se_session *);
148 int core_alua_check_nonop_delay(struct se_cmd *);
150 int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
151 void core_tmr_release_req(struct se_tmr_req *);
152 int transport_generic_handle_tmr(struct se_cmd *);
153 void transport_generic_request_failure(struct se_cmd *, sense_reason_t);
154 void __target_execute_cmd(struct se_cmd *);
155 int transport_lookup_tmr_lun(struct se_cmd *, u32);
157 struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
159 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
161 void core_tpg_clear_object_luns(struct se_portal_group *);
162 int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
163 unsigned char *, u32, int);
164 int core_tpg_set_initiator_node_tag(struct se_portal_group *,
165 struct se_node_acl *, const char *);
166 int core_tpg_register(const struct target_core_fabric_ops *,
167 struct se_wwn *, struct se_portal_group *, int);
168 int core_tpg_deregister(struct se_portal_group *);
171 * The LIO target core uses DMA_TO_DEVICE to mean that data is going
172 * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
173 * that data is coming from the target (eg handling a READ). However,
174 * this is just the opposite of what we have to tell the DMA mapping
175 * layer -- eg when handling a READ, the HBA will have to DMA the data
176 * out of memory so it can send it to the initiator, which means we
177 * need to use DMA_TO_DEVICE when we map the data.
179 static inline enum dma_data_direction
180 target_reverse_dma_direction(struct se_cmd *se_cmd)
182 if (se_cmd->se_cmd_flags & SCF_BIDI)
183 return DMA_BIDIRECTIONAL;
185 switch (se_cmd->data_direction) {
187 return DMA_FROM_DEVICE;
188 case DMA_FROM_DEVICE:
189 return DMA_TO_DEVICE;
196 #endif /* TARGET_CORE_FABRICH */