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1 | #ifndef TARGET_CORE_FABRIC_H |
2 | #define TARGET_CORE_FABRIC_H |
3 | |
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 *, |
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 | /* |
66 | * fabric module calls for target_core_fabric_configfs.c |
67 | */ |
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 *, |
75 | struct se_lun *); |
76 | void (*fabric_pre_unlink)(struct se_portal_group *, |
77 | struct se_lun *); |
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 *); |
84 | }; |
85 | |
86 | struct se_session *transport_init_session(void); |
87 | int transport_alloc_session_tags(struct se_session *, unsigned int, |
88 | 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 *); |
100 | |
101 | |
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 | int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *, |
110 | unsigned char *, u32, u32, int, int, int); |
111 | int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess, |
112 | unsigned char *sense, u32 unpacked_lun, |
113 | void *fabric_tmr_ptr, unsigned char tm_type, |
114 | gfp_t, unsigned int, int); |
115 | int transport_handle_cdb_direct(struct se_cmd *); |
116 | sense_reason_t transport_generic_new_cmd(struct se_cmd *); |
117 | |
118 | void target_execute_cmd(struct se_cmd *cmd); |
119 | |
120 | int transport_generic_free_cmd(struct se_cmd *, int); |
121 | |
122 | bool transport_wait_for_tasks(struct se_cmd *); |
123 | int transport_check_aborted_status(struct se_cmd *, int); |
124 | int transport_send_check_condition_and_sense(struct se_cmd *, |
125 | sense_reason_t, int); |
126 | int target_get_sess_cmd(struct se_session *, struct se_cmd *, bool); |
127 | int target_put_sess_cmd(struct se_session *, struct se_cmd *); |
128 | void target_sess_cmd_list_set_waiting(struct se_session *); |
129 | void target_wait_for_sess_cmds(struct se_session *); |
130 | |
131 | int core_alua_check_nonop_delay(struct se_cmd *); |
132 | |
133 | int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t); |
134 | void core_tmr_release_req(struct se_tmr_req *); |
135 | int transport_generic_handle_tmr(struct se_cmd *); |
136 | void transport_generic_request_failure(struct se_cmd *, sense_reason_t); |
137 | void __target_execute_cmd(struct se_cmd *); |
138 | int transport_lookup_tmr_lun(struct se_cmd *, u32); |
139 | |
140 | struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg, |
141 | unsigned char *); |
142 | struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *, |
143 | unsigned char *); |
144 | void core_tpg_clear_object_luns(struct se_portal_group *); |
145 | struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *, |
146 | struct se_node_acl *, const char *, u32); |
147 | int core_tpg_del_initiator_node_acl(struct se_portal_group *, |
148 | struct se_node_acl *, int); |
149 | int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *, |
150 | unsigned char *, u32, int); |
151 | int core_tpg_set_initiator_node_tag(struct se_portal_group *, |
152 | struct se_node_acl *, const char *); |
153 | int core_tpg_register(struct target_core_fabric_ops *, struct se_wwn *, |
154 | struct se_portal_group *, void *, int); |
155 | int core_tpg_deregister(struct se_portal_group *); |
156 | |
157 | /* SAS helpers */ |
158 | u8 sas_get_fabric_proto_ident(struct se_portal_group *); |
159 | u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *, |
160 | struct t10_pr_registration *, int *, unsigned char *); |
161 | u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *, |
162 | struct t10_pr_registration *, int *); |
163 | char *sas_parse_pr_out_transport_id(struct se_portal_group *, const char *, |
164 | u32 *, char **); |
165 | |
166 | /* FC helpers */ |
167 | u8 fc_get_fabric_proto_ident(struct se_portal_group *); |
168 | u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *, |
169 | struct t10_pr_registration *, int *, unsigned char *); |
170 | u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *, |
171 | struct t10_pr_registration *, int *); |
172 | char *fc_parse_pr_out_transport_id(struct se_portal_group *, const char *, |
173 | u32 *, char **); |
174 | |
175 | /* iSCSI helpers */ |
176 | u8 iscsi_get_fabric_proto_ident(struct se_portal_group *); |
177 | u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *, |
178 | struct t10_pr_registration *, int *, unsigned char *); |
179 | u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *, |
180 | struct t10_pr_registration *, int *); |
181 | char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *, |
182 | u32 *, char **); |
183 | |
184 | /* |
185 | * The LIO target core uses DMA_TO_DEVICE to mean that data is going |
186 | * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean |
187 | * that data is coming from the target (eg handling a READ). However, |
188 | * this is just the opposite of what we have to tell the DMA mapping |
189 | * layer -- eg when handling a READ, the HBA will have to DMA the data |
190 | * out of memory so it can send it to the initiator, which means we |
191 | * need to use DMA_TO_DEVICE when we map the data. |
192 | */ |
193 | static inline enum dma_data_direction |
194 | target_reverse_dma_direction(struct se_cmd *se_cmd) |
195 | { |
196 | if (se_cmd->se_cmd_flags & SCF_BIDI) |
197 | return DMA_BIDIRECTIONAL; |
198 | |
199 | switch (se_cmd->data_direction) { |
200 | case DMA_TO_DEVICE: |
201 | return DMA_FROM_DEVICE; |
202 | case DMA_FROM_DEVICE: |
203 | return DMA_TO_DEVICE; |
204 | case DMA_NONE: |
205 | default: |
206 | return DMA_NONE; |
207 | } |
208 | } |
209 | |
210 | #endif /* TARGET_CORE_FABRICH */ |
211 |
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