include/target/target_core_fabric.h

   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 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         /*
  51          * Called with spin_lock_bh(struct se_portal_group->session_lock held.
  52          */
  53         int (*shutdown_session)(struct se_session *);
  54         void (*close_session)(struct se_session *);
  55         u32 (*sess_get_index)(struct se_session *);
  56         /*
  57          * Used only for SCSI fabrics that contain multi-value TransportIDs
  58          * (like iSCSI).  All other SCSI fabrics should set this to NULL.
  59          */
  60         u32 (*sess_get_initiator_sid)(struct se_session *,
  61                                       unsigned char *, u32);
  62         int (*write_pending)(struct se_cmd *);
  63         int (*write_pending_status)(struct se_cmd *);
  64         void (*set_default_node_attributes)(struct se_node_acl *);
  65         u32 (*get_task_tag)(struct se_cmd *);
  66         int (*get_cmd_state)(struct se_cmd *);
  67         int (*queue_data_in)(struct se_cmd *);
  68         int (*queue_status)(struct se_cmd *);
  69         int (*queue_tm_rsp)(struct se_cmd *);
  70         u16 (*set_fabric_sense_len)(struct se_cmd *, u32);
  71         u16 (*get_fabric_sense_len)(void);
  72         /*
  73          * fabric module calls for target_core_fabric_configfs.c
  74          */
  75         struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
  76                                 struct config_group *, const char *);
  77         void (*fabric_drop_wwn)(struct se_wwn *);
  78         struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
  79                                 struct config_group *, const char *);
  80         void (*fabric_drop_tpg)(struct se_portal_group *);
  81         int (*fabric_post_link)(struct se_portal_group *,
  82                                 struct se_lun *);
  83         void (*fabric_pre_unlink)(struct se_portal_group *,
  84                                 struct se_lun *);
  85         struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
  86                                 struct config_group *, const char *);
  87         void (*fabric_drop_np)(struct se_tpg_np *);
  88         struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
  89                                 struct config_group *, const char *);
  90         void (*fabric_drop_nodeacl)(struct se_node_acl *);
  91 };
  92
  93 struct se_session *transport_init_session(void);
  94 void    __transport_register_session(struct se_portal_group *,
  95                 struct se_node_acl *, struct se_session *, void *);
  96 void    transport_register_session(struct se_portal_group *,
  97                 struct se_node_acl *, struct se_session *, void *);
  98 void    target_get_session(struct se_session *);
  99 void    target_put_session(struct se_session *);
 100 void    transport_free_session(struct se_session *);
 101 void    target_put_nacl(struct se_node_acl *);
 102 void    transport_deregister_session_configfs(struct se_session *);
 103 void    transport_deregister_session(struct se_session *);
 104
 105
 106 void    transport_init_se_cmd(struct se_cmd *, struct target_core_fabric_ops *,
 107                 struct se_session *, u32, int, int, unsigned char *);
 108 int     transport_lookup_cmd_lun(struct se_cmd *, u32);
 109 int     target_setup_cmd_from_cdb(struct se_cmd *, unsigned char *);
 110 void    target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
 111                 unsigned char *, u32, u32, int, int, int);
 112 int     target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
 113                 unsigned char *sense, u32 unpacked_lun,
 114                 void *fabric_tmr_ptr, unsigned char tm_type,
 115                 gfp_t, unsigned int, int);
 116 int     transport_handle_cdb_direct(struct se_cmd *);
 117 int     transport_generic_handle_cdb_map(struct se_cmd *);
 118 int     transport_generic_handle_data(struct se_cmd *);
 119 int     transport_generic_map_mem_to_cmd(struct se_cmd *cmd,
 120                 struct scatterlist *, u32, struct scatterlist *, u32);
 121 int     transport_generic_new_cmd(struct se_cmd *);
 122
 123 void    transport_generic_process_write(struct se_cmd *);
 124
 125 void    transport_generic_free_cmd(struct se_cmd *, int);
 126
 127 bool    transport_wait_for_tasks(struct se_cmd *);
 128 int     transport_check_aborted_status(struct se_cmd *, int);
 129 int     transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
 130
 131 void    target_get_sess_cmd(struct se_session *, struct se_cmd *, bool);
 132 int     target_put_sess_cmd(struct se_session *, struct se_cmd *);
 133 void    target_splice_sess_cmd_list(struct se_session *);
 134 void    target_wait_for_sess_cmds(struct se_session *, int);
 135
 136 int     core_alua_check_nonop_delay(struct se_cmd *);
 137
 138 int     core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
 139 void    core_tmr_release_req(struct se_tmr_req *);
 140 int     transport_generic_handle_tmr(struct se_cmd *);
 141 void    transport_generic_request_failure(struct se_cmd *);
 142 int     transport_lookup_tmr_lun(struct se_cmd *, u32);
 143
 144 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
 145                 unsigned char *);
 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_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 #endif /* TARGET_CORE_FABRICH */