target: Add target_submit_tmr helper function
Andy Grover [Thu, 19 Jan 2012 21:39:21 +0000 (13:39 -0800)]
Similar to target_submit_cmd, this function lets fabrics call one function
(albeit with a lot of parameters) instead of 3 or more.

(nab: Add missing return for transport_lookup_tmr_lun failure)

Signed-off-by: Andy Grover <agrover@redhat.com>
Cc: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_transport.c
include/target/target_core_fabric.h

index c10c365..42da7a3 100644 (file)
@@ -1687,6 +1687,54 @@ void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
 }
 EXPORT_SYMBOL(target_submit_cmd);
 
+/**
+ * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
+ *                     for TMR CDBs
+ *
+ * @se_cmd: command descriptor to submit
+ * @se_sess: associated se_sess for endpoint
+ * @sense: pointer to SCSI sense buffer
+ * @unpacked_lun: unpacked LUN to reference for struct se_lun
+ * @fabric_context: fabric context for TMR req
+ * @tm_type: Type of TM request
+ *
+ * Callable from all contexts.
+ **/
+
+void target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
+               unsigned char *sense, u32 unpacked_lun,
+               void *fabric_tmr_ptr, unsigned char tm_type, int flags)
+{
+       struct se_portal_group *se_tpg;
+       int ret;
+
+       se_tpg = se_sess->se_tpg;
+       BUG_ON(!se_tpg);
+
+       transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
+                             0, DMA_NONE, MSG_SIMPLE_TAG, sense);
+
+       /* See target_submit_cmd for commentary */
+       target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
+
+       ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, GFP_KERNEL);
+       if (ret < 0) {
+               dump_stack();
+               /* FIXME XXX */
+               return;
+       }
+
+       ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
+       if (ret) {
+               transport_send_check_condition_and_sense(se_cmd,
+                       se_cmd->scsi_sense_reason, 0);
+               transport_generic_free_cmd(se_cmd, 0);
+               return;
+       }
+       transport_generic_handle_tmr(se_cmd);
+}
+EXPORT_SYMBOL(target_submit_tmr);
+
 /*
  * Used by fabric module frontends defining a TFO->new_cmd_map() caller
  * to  queue up a newly setup se_cmd w/ TRANSPORT_NEW_CMD_MAP in order to
index c5c16ef..fcc3406 100644 (file)
@@ -116,6 +116,9 @@ int transport_lookup_cmd_lun(struct se_cmd *, u32);
 int    transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
 void   target_submit_cmd(struct se_cmd *, struct se_session *, unsigned char *,
                unsigned char *, u32, u32, int, int, int);
+void   target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
+               unsigned char *sense, u32 unpacked_lun,
+               void *fabric_tmr_ptr, unsigned char tm_type, int flags);
 int    transport_handle_cdb_direct(struct se_cmd *);
 int    transport_generic_handle_cdb_map(struct se_cmd *);
 int    transport_generic_handle_data(struct se_cmd *);