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target_core_fabric.h
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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  int (*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 void __transport_register_session(struct se_portal_group *,
88  struct se_node_acl *, struct se_session *, void *);
89 void transport_register_session(struct se_portal_group *,
90  struct se_node_acl *, struct se_session *, void *);
91 void target_get_session(struct se_session *);
92 void target_put_session(struct se_session *);
93 void transport_free_session(struct se_session *);
94 void target_put_nacl(struct se_node_acl *);
95 void transport_deregister_session_configfs(struct se_session *);
96 void transport_deregister_session(struct se_session *);
97 
98 
99 void transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
100  struct se_session *, u32, int, int, unsigned char *);
101 int transport_lookup_cmd_lun(struct se_cmd *, u32);
102 int target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
103 int target_submit_cmd_map_sgls(struct se_cmd *, struct se_session *,
104  unsigned char *, unsigned char *, u32, u32, int, int, int,
105  struct scatterlist *, u32, struct scatterlist *, u32);
106 int target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
107  unsigned char *, u32, u32, int, int, int);
108 int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
109  unsigned char *sense, u32 unpacked_lun,
110  void *fabric_tmr_ptr, unsigned char tm_type,
111  gfp_t, unsigned int, int);
112 int transport_handle_cdb_direct(struct se_cmd *);
113 int transport_generic_map_mem_to_cmd(struct se_cmd *cmd,
114  struct scatterlist *, u32, struct scatterlist *, u32);
115 int transport_generic_new_cmd(struct se_cmd *);
116 
117 void target_execute_cmd(struct se_cmd *cmd);
118 
119 void transport_generic_free_cmd(struct se_cmd *, int);
120 
121 bool transport_wait_for_tasks(struct se_cmd *);
122 int transport_check_aborted_status(struct se_cmd *, int);
123 int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
124 
125 int target_put_sess_cmd(struct se_session *, struct se_cmd *);
126 void target_sess_cmd_list_set_waiting(struct se_session *);
127 void target_wait_for_sess_cmds(struct se_session *, int);
128 
129 int core_alua_check_nonop_delay(struct se_cmd *);
130 
131 int core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
132 void core_tmr_release_req(struct se_tmr_req *);
133 int transport_generic_handle_tmr(struct se_cmd *);
134 void transport_generic_request_failure(struct se_cmd *);
135 int transport_lookup_tmr_lun(struct se_cmd *, u32);
136 
137 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
138  unsigned char *);
139 void core_tpg_clear_object_luns(struct se_portal_group *);
140 struct se_node_acl *core_tpg_add_initiator_node_acl(struct se_portal_group *,
141  struct se_node_acl *, const char *, u32);
142 int core_tpg_del_initiator_node_acl(struct se_portal_group *,
143  struct se_node_acl *, int);
144 int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
145  unsigned char *, u32, int);
146 int core_tpg_register(struct target_core_fabric_ops *, struct se_wwn *,
147  struct se_portal_group *, void *, int);
148 int core_tpg_deregister(struct se_portal_group *);
149 
150 /* SAS helpers */
151 u8 sas_get_fabric_proto_ident(struct se_portal_group *);
152 u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
153  struct t10_pr_registration *, int *, unsigned char *);
154 u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
155  struct t10_pr_registration *, int *);
156 char *sas_parse_pr_out_transport_id(struct se_portal_group *, const char *,
157  u32 *, char **);
158 
159 /* FC helpers */
160 u8 fc_get_fabric_proto_ident(struct se_portal_group *);
161 u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
162  struct t10_pr_registration *, int *, unsigned char *);
163 u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
164  struct t10_pr_registration *, int *);
165 char *fc_parse_pr_out_transport_id(struct se_portal_group *, const char *,
166  u32 *, char **);
167 
168 /* iSCSI helpers */
169 u8 iscsi_get_fabric_proto_ident(struct se_portal_group *);
170 u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
171  struct t10_pr_registration *, int *, unsigned char *);
172 u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
173  struct t10_pr_registration *, int *);
174 char *iscsi_parse_pr_out_transport_id(struct se_portal_group *, const char *,
175  u32 *, char **);
176 
177 #endif /* TARGET_CORE_FABRICH */
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