[PATCH 14/36] target: Introduce target_submit_tmr_fail_response

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Similar to transport_send_check_condition_and_sense(), some error
condition and status can only be checked by the user of the target core
(such as TMR_OVERLAPPED_TAG_ATTEMPTED). Introduce
target_submit_tmr_fail_response() to allow the user to directly provide
the fail reason of the TMR command.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
---
 drivers/target/target_core_transport.c | 33 ++++++++++++++++++++++++++
 include/target/target_core_fabric.h    |  3 +++
 2 files changed, 36 insertions(+)

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 930bf8779d87..c899da241b38 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1989,6 +1989,39 @@ int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
 }
 EXPORT_SYMBOL(target_submit_tmr);
 
+void target_submit_tmr_fail_response(struct se_cmd *se_cmd,
+		enum tcm_tmrsp_table rsp,
+		struct se_session *se_sess, u64 unpacked_lun,
+		gfp_t gfp, u64 tag, int flags)
+{
+	struct se_portal_group *se_tpg;
+	int ret;
+
+	se_tpg = se_sess->se_tpg;
+	BUG_ON(!se_tpg);
+
+	__target_init_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
+			  0, DMA_NONE, TCM_SIMPLE_TAG, NULL, unpacked_lun);
+
+	ret = core_tmr_alloc_req(se_cmd, NULL, TMR_UNKNOWN, gfp);
+	if (ret < 0)
+		return;
+
+	se_cmd->se_tmr_req->ref_task_tag = tag;
+	se_cmd->se_tmr_req->response = rsp;
+
+	/* See target_submit_cmd for commentary */
+	ret = target_get_sess_cmd(se_cmd, flags & TARGET_SCF_ACK_KREF);
+	if (ret) {
+		core_tmr_release_req(se_cmd->se_tmr_req);
+		return;
+	}
+
+	INIT_WORK(&se_cmd->work, target_complete_tmr_failure);
+	schedule_work(&se_cmd->work);
+}
+EXPORT_SYMBOL(target_submit_tmr_fail_response);
+
 /*
  * Handle SAM-esque emulation for generic transport request failures.
  */
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index 38f0662476d1..73bf6b372926 100644
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -172,6 +172,9 @@ int	target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
 		unsigned char *sense, u64 unpacked_lun,
 		void *fabric_tmr_ptr, unsigned char tm_type,
 		gfp_t, u64, int);
+void	target_submit_tmr_fail_response(struct se_cmd *se_cmd,
+		enum tcm_tmrsp_table rsp,
+		struct se_session *se_sess, u64 unpacked_lun, gfp_t, u64, int);
 int	transport_handle_cdb_direct(struct se_cmd *);
 sense_reason_t	transport_generic_new_cmd(struct se_cmd *);
 
-- 
2.28.0




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