include/target/target_core_fabric_ops.h

   1 /* Defined in target_core_configfs.h */
   2 struct target_fabric_configfs;
   3
   4 struct target_core_fabric_ops {
   5         struct configfs_subsystem *tf_subsys;
   6         /*
   7          * Optional to signal struct se_task->task_sg[] padding entries
   8          * for scatterlist chaining using transport_do_task_sg_link(),
   9          * disabled by default
  10          */
  11         bool task_sg_chaining;
  12         char *(*get_fabric_name)(void);
  13         u8 (*get_fabric_proto_ident)(struct se_portal_group *);
  14         char *(*tpg_get_wwn)(struct se_portal_group *);
  15         u16 (*tpg_get_tag)(struct se_portal_group *);
  16         u32 (*tpg_get_default_depth)(struct se_portal_group *);
  17         u32 (*tpg_get_pr_transport_id)(struct se_portal_group *,
  18                                 struct se_node_acl *,
  19                                 struct t10_pr_registration *, int *,
  20                                 unsigned char *);
  21         u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
  22                                 struct se_node_acl *,
  23                                 struct t10_pr_registration *, int *);
  24         char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *,
  25                                 const char *, u32 *, char **);
  26         int (*tpg_check_demo_mode)(struct se_portal_group *);
  27         int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
  28         int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
  29         int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *);
  30         /*
  31          * Optionally used by fabrics to allow demo-mode login, but not
  32          * expose any TPG LUNs, and return 'not connected' in standard
  33          * inquiry response
  34          */
  35         int (*tpg_check_demo_mode_login_only)(struct se_portal_group *);
  36         struct se_node_acl *(*tpg_alloc_fabric_acl)(
  37                                         struct se_portal_group *);
  38         void (*tpg_release_fabric_acl)(struct se_portal_group *,
  39                                         struct se_node_acl *);
  40         u32 (*tpg_get_inst_index)(struct se_portal_group *);
  41         /*
  42          * Optional function pointer for TCM to perform command map
  43          * from TCM processing thread context, for those struct se_cmd
  44          * initially allocated in interrupt context.
  45          */
  46         int (*new_cmd_map)(struct se_cmd *);
  47         /*
  48          * Optional to release struct se_cmd and fabric dependent allocated
  49          * I/O descriptor in transport_cmd_check_stop().
  50          *
  51          * Returning 1 will signal a descriptor has been released.
  52          * Returning 0 will signal a descriptor has not been released.
  53          */
  54         int (*check_stop_free)(struct se_cmd *);
  55         /*
  56          * Optional check for active I/O shutdown
  57          */
  58         int (*check_release_cmd)(struct se_cmd *);
  59         void (*release_cmd)(struct se_cmd *);
  60         /*
  61          * Called with spin_lock_bh(struct se_portal_group->session_lock held.
  62          */
  63         int (*shutdown_session)(struct se_session *);
  64         void (*close_session)(struct se_session *);
  65         void (*stop_session)(struct se_session *, int, int);
  66         void (*fall_back_to_erl0)(struct se_session *);
  67         int (*sess_logged_in)(struct se_session *);
  68         u32 (*sess_get_index)(struct se_session *);
  69         /*
  70          * Used only for SCSI fabrics that contain multi-value TransportIDs
  71          * (like iSCSI).  All other SCSI fabrics should set this to NULL.
  72          */
  73         u32 (*sess_get_initiator_sid)(struct se_session *,
  74                                       unsigned char *, u32);
  75         int (*write_pending)(struct se_cmd *);
  76         int (*write_pending_status)(struct se_cmd *);
  77         void (*set_default_node_attributes)(struct se_node_acl *);
  78         u32 (*get_task_tag)(struct se_cmd *);
  79         int (*get_cmd_state)(struct se_cmd *);
  80         int (*queue_data_in)(struct se_cmd *);
  81         int (*queue_status)(struct se_cmd *);
  82         int (*queue_tm_rsp)(struct se_cmd *);
  83         u16 (*set_fabric_sense_len)(struct se_cmd *, u32);
  84         u16 (*get_fabric_sense_len)(void);
  85         int (*is_state_remove)(struct se_cmd *);
  86         /*
  87          * fabric module calls for target_core_fabric_configfs.c
  88          */
  89         struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
  90                                 struct config_group *, const char *);
  91         void (*fabric_drop_wwn)(struct se_wwn *);
  92         struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
  93                                 struct config_group *, const char *);
  94         void (*fabric_drop_tpg)(struct se_portal_group *);
  95         int (*fabric_post_link)(struct se_portal_group *,
  96                                 struct se_lun *);
  97         void (*fabric_pre_unlink)(struct se_portal_group *,
  98                                 struct se_lun *);
  99         struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
 100                                 struct config_group *, const char *);
 101         void (*fabric_drop_np)(struct se_tpg_np *);
 102         struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
 103                                 struct config_group *, const char *);
 104         void (*fabric_drop_nodeacl)(struct se_node_acl *);
 105 };