scsi: target/core: Remove the write_pending_status() callback function

Due to the patch that makes TMF handling synchronous the
write_pending_status() callback function is no longer called.  Hence remove
it.
Acked-by: Felipe Balbi <balbi@ti.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Saurav Kashyap <saurav.kashyap@qlogic.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Documentation/target/tcm_mod_builder.py

@@ -297,7 +297,6 @@ def tcm_mod_build_configfs(proto_ident, fabric_mod_dir_var, fabric_mod_name):
 	buf += "	.sess_get_index			= " + fabric_mod_name + "_sess_get_index,\n"
 	buf += "	.sess_get_initiator_sid		= NULL,\n"
 	buf += "	.write_pending			= " + fabric_mod_name + "_write_pending,\n"
-	buf += "	.write_pending_status		= " + fabric_mod_name + "_write_pending_status,\n"
 	buf += "	.set_default_node_attributes	= " + fabric_mod_name + "_set_default_node_attrs,\n"
 	buf += "	.get_cmd_state			= " + fabric_mod_name + "_get_cmd_state,\n"
 	buf += "	.queue_data_in			= " + fabric_mod_name + "_queue_data_in,\n"
@@ -479,13 +478,6 @@ def tcm_mod_dump_fabric_ops(proto_ident, fabric_mod_dir_var, fabric_mod_name):
 			buf += "}\n\n"
 			bufi += "int " + fabric_mod_name + "_write_pending(struct se_cmd *);\n"
 
-		if re.search('write_pending_status\)\(', fo):
-			buf += "int " + fabric_mod_name + "_write_pending_status(struct se_cmd *se_cmd)\n"
-			buf += "{\n"
-			buf += "	return 0;\n"
-			buf += "}\n\n"
-			bufi += "int " + fabric_mod_name + "_write_pending_status(struct se_cmd *);\n"
-
 		if re.search('set_default_node_attributes\)\(', fo):
 			buf += "void " + fabric_mod_name + "_set_default_node_attrs(struct se_node_acl *nacl)\n"
 			buf += "{\n"

drivers/infiniband/ulp/srpt/ib_srpt.c

@@ -2703,14 +2703,6 @@ static int srpt_rdma_cm_handler(struct rdma_cm_id *cm_id,
 	return ret;
 }
 
-static int srpt_write_pending_status(struct se_cmd *se_cmd)
-{
-	struct srpt_send_ioctx *ioctx;
-
-	ioctx = container_of(se_cmd, struct srpt_send_ioctx, cmd);
-	return ioctx->state == SRPT_STATE_NEED_DATA;
-}
-
 /*
  * srpt_write_pending - Start data transfer from initiator to target (write).
  */
@@ -3806,7 +3798,6 @@ static const struct target_core_fabric_ops srpt_template = {
 	.sess_get_index			= srpt_sess_get_index,
 	.sess_get_initiator_sid		= NULL,
 	.write_pending			= srpt_write_pending,
-	.write_pending_status		= srpt_write_pending_status,
 	.set_default_node_attributes	= srpt_set_default_node_attrs,
 	.get_cmd_state			= srpt_get_tcm_cmd_state,
 	.queue_data_in			= srpt_queue_data_in,

drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c

@@ -3788,11 +3788,6 @@ static int ibmvscsis_write_pending(struct se_cmd *se_cmd)
 	return 0;
 }
 
-static int ibmvscsis_write_pending_status(struct se_cmd *se_cmd)
-{
-	return 0;
-}
-
 static void ibmvscsis_set_default_node_attrs(struct se_node_acl *nacl)
 {
 }
@@ -4053,7 +4048,6 @@ static const struct target_core_fabric_ops ibmvscsis_ops = {
 	.release_cmd			= ibmvscsis_release_cmd,
 	.sess_get_index			= ibmvscsis_sess_get_index,
 	.write_pending			= ibmvscsis_write_pending,
-	.write_pending_status		= ibmvscsis_write_pending_status,
 	.set_default_node_attributes	= ibmvscsis_set_default_node_attrs,
 	.get_cmd_state			= ibmvscsis_get_cmd_state,
 	.queue_data_in			= ibmvscsis_queue_data_in,

drivers/scsi/qla2xxx/tcm_qla2xxx.c

@@ -420,26 +420,6 @@ static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 	return qlt_rdy_to_xfer(cmd);
 }
 
-static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
-{
-	unsigned long flags;
-	/*
-	 * Check for WRITE_PENDING status to determine if we need to wait for
-	 * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
-	 */
-	spin_lock_irqsave(&se_cmd->t_state_lock, flags);
-	if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
-	    se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
-		spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
-		wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
-						50);
-		return 0;
-	}
-	spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
-
-	return 0;
-}
-
 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 {
 	return;
@@ -537,15 +517,6 @@ static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 
 	cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 	if (!cmd->write_data_transferred) {
-		/*
-		 * Check if se_cmd has already been aborted via LUN_RESET, and
-		 * waiting upon completion in tcm_qla2xxx_write_pending_status()
-		 */
-		if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
-			complete(&cmd->se_cmd.t_transport_stop_comp);
-			return;
-		}
-
 		switch (cmd->dif_err_code) {
 		case DIF_ERR_GRD:
 			cmd->se_cmd.pi_err =
@@ -1902,7 +1873,6 @@ static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
 	.sess_get_index			= tcm_qla2xxx_sess_get_index,
 	.sess_get_initiator_sid		= NULL,
 	.write_pending			= tcm_qla2xxx_write_pending,
-	.write_pending_status		= tcm_qla2xxx_write_pending_status,
 	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
 	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
 	.queue_data_in			= tcm_qla2xxx_queue_data_in,
@@ -1943,7 +1913,6 @@ static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
 	.sess_get_index			= tcm_qla2xxx_sess_get_index,
 	.sess_get_initiator_sid		= NULL,
 	.write_pending			= tcm_qla2xxx_write_pending,
-	.write_pending_status		= tcm_qla2xxx_write_pending_status,
 	.set_default_node_attributes	= tcm_qla2xxx_set_default_node_attrs,
 	.get_cmd_state			= tcm_qla2xxx_get_cmd_state,
 	.queue_data_in			= tcm_qla2xxx_queue_data_in,

drivers/target/iscsi/iscsi_target_configfs.c

@@ -1389,18 +1389,6 @@ static int lio_write_pending(struct se_cmd *se_cmd)
 	return 0;
 }
 
-static int lio_write_pending_status(struct se_cmd *se_cmd)
-{
-	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
-	int ret;
-
-	spin_lock_bh(&cmd->istate_lock);
-	ret = !(cmd->cmd_flags & ICF_GOT_LAST_DATAOUT);
-	spin_unlock_bh(&cmd->istate_lock);
-
-	return ret;
-}
-
 static int lio_queue_status(struct se_cmd *se_cmd)
 {
 	struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
@@ -1564,7 +1552,6 @@ const struct target_core_fabric_ops iscsi_ops = {
 	.sess_get_index			= lio_sess_get_index,
 	.sess_get_initiator_sid		= lio_sess_get_initiator_sid,
 	.write_pending			= lio_write_pending,
-	.write_pending_status		= lio_write_pending_status,
 	.set_default_node_attributes	= lio_set_default_node_attributes,
 	.get_cmd_state			= iscsi_get_cmd_state,
 	.queue_data_in			= lio_queue_data_in,

drivers/target/loopback/tcm_loop.c

@@ -560,11 +560,6 @@ static int tcm_loop_write_pending(struct se_cmd *se_cmd)
 	return 0;
 }
 
-static int tcm_loop_write_pending_status(struct se_cmd *se_cmd)
-{
-	return 0;
-}
-
 static int tcm_loop_queue_data_in(struct se_cmd *se_cmd)
 {
 	struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
@@ -1159,7 +1154,6 @@ static const struct target_core_fabric_ops loop_ops = {
 	.release_cmd			= tcm_loop_release_cmd,
 	.sess_get_index			= tcm_loop_sess_get_index,
 	.write_pending			= tcm_loop_write_pending,
-	.write_pending_status		= tcm_loop_write_pending_status,
 	.set_default_node_attributes	= tcm_loop_set_default_node_attributes,
 	.get_cmd_state			= tcm_loop_get_cmd_state,
 	.queue_data_in			= tcm_loop_queue_data_in,

drivers/target/sbp/sbp_target.c

@@ -1749,11 +1749,6 @@ static int sbp_write_pending(struct se_cmd *se_cmd)
 	return 0;
 }
 
-static int sbp_write_pending_status(struct se_cmd *se_cmd)
-{
-	return 0;
-}
-
 static void sbp_set_default_node_attrs(struct se_node_acl *nacl)
 {
 	return;
@@ -2329,7 +2324,6 @@ static const struct target_core_fabric_ops sbp_ops = {
 	.release_cmd			= sbp_release_cmd,
 	.sess_get_index			= sbp_sess_get_index,
 	.write_pending			= sbp_write_pending,
-	.write_pending_status		= sbp_write_pending_status,
 	.set_default_node_attributes	= sbp_set_default_node_attrs,
 	.get_cmd_state			= sbp_get_cmd_state,
 	.queue_data_in			= sbp_queue_data_in,

drivers/target/target_core_configfs.c

@@ -401,10 +401,6 @@ static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 		pr_err("Missing tfo->write_pending()\n");
 		return -EINVAL;
 	}
-	if (!tfo->write_pending_status) {
-		pr_err("Missing tfo->write_pending_status()\n");
-		return -EINVAL;
-	}
 	if (!tfo->set_default_node_attributes) {
 		pr_err("Missing tfo->set_default_node_attributes()\n");
 		return -EINVAL;

drivers/target/target_core_xcopy.c

@@ -442,11 +442,6 @@ static int xcopy_pt_write_pending(struct se_cmd *se_cmd)
 	return 0;
 }
 
-static int xcopy_pt_write_pending_status(struct se_cmd *se_cmd)
-{
-	return 0;
-}
-
 static int xcopy_pt_queue_data_in(struct se_cmd *se_cmd)
 {
 	return 0;
@@ -463,7 +458,6 @@ static const struct target_core_fabric_ops xcopy_pt_tfo = {
 	.release_cmd		= xcopy_pt_release_cmd,
 	.check_stop_free	= xcopy_pt_check_stop_free,
 	.write_pending		= xcopy_pt_write_pending,
-	.write_pending_status	= xcopy_pt_write_pending_status,
 	.queue_data_in		= xcopy_pt_queue_data_in,
 	.queue_status		= xcopy_pt_queue_status,
 };

drivers/target/tcm_fc/tcm_fc.h

@@ -158,7 +158,6 @@ void ft_release_cmd(struct se_cmd *);
 int ft_queue_status(struct se_cmd *);
 int ft_queue_data_in(struct se_cmd *);
 int ft_write_pending(struct se_cmd *);
-int ft_write_pending_status(struct se_cmd *);
 int ft_get_cmd_state(struct se_cmd *);
 void ft_queue_tm_resp(struct se_cmd *);
 void ft_aborted_task(struct se_cmd *);

drivers/target/tcm_fc/tfc_cmd.c

@@ -184,13 +184,6 @@ int ft_queue_status(struct se_cmd *se_cmd)
 	return 0;
 }
 
-int ft_write_pending_status(struct se_cmd *se_cmd)
-{
-	struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
-
-	return cmd->write_data_len != se_cmd->data_length;
-}
-
 /*
  * Send TX_RDY (transfer ready).
  */

drivers/target/tcm_fc/tfc_conf.c

@@ -437,7 +437,6 @@ static const struct target_core_fabric_ops ft_fabric_ops = {
 	.sess_get_index =		ft_sess_get_index,
 	.sess_get_initiator_sid =	NULL,
 	.write_pending =		ft_write_pending,
-	.write_pending_status =		ft_write_pending_status,
 	.set_default_node_attributes =	ft_set_default_node_attr,
 	.get_cmd_state =		ft_get_cmd_state,
 	.queue_data_in =		ft_queue_data_in,

drivers/usb/gadget/function/f_tcm.c

@@ -1292,14 +1292,6 @@ static u32 usbg_sess_get_index(struct se_session *se_sess)
 	return 0;
 }
 
-/*
- * XXX Error recovery: return != 0 if we expect writes. Dunno when that could be
- */
-static int usbg_write_pending_status(struct se_cmd *se_cmd)
-{
-	return 0;
-}
-
 static void usbg_set_default_node_attrs(struct se_node_acl *nacl)
 {
 }
@@ -1725,7 +1717,6 @@ static const struct target_core_fabric_ops usbg_ops = {
 	.sess_get_index			= usbg_sess_get_index,
 	.sess_get_initiator_sid		= NULL,
 	.write_pending			= usbg_send_write_request,
-	.write_pending_status		= usbg_write_pending_status,
 	.set_default_node_attributes	= usbg_set_default_node_attrs,
 	.get_cmd_state			= usbg_get_cmd_state,
 	.queue_data_in			= usbg_send_read_response,

drivers/vhost/scsi.c

@@ -346,11 +346,6 @@ static int vhost_scsi_write_pending(struct se_cmd *se_cmd)
 	return 0;
 }
 
-static int vhost_scsi_write_pending_status(struct se_cmd *se_cmd)
-{
-	return 0;
-}
-
 static void vhost_scsi_set_default_node_attrs(struct se_node_acl *nacl)
 {
 	return;
@@ -2298,7 +2293,6 @@ static const struct target_core_fabric_ops vhost_scsi_ops = {
 	.sess_get_index			= vhost_scsi_sess_get_index,
 	.sess_get_initiator_sid		= NULL,
 	.write_pending			= vhost_scsi_write_pending,
-	.write_pending_status		= vhost_scsi_write_pending_status,
 	.set_default_node_attributes	= vhost_scsi_set_default_node_attrs,
 	.get_cmd_state			= vhost_scsi_get_cmd_state,
 	.queue_data_in			= vhost_scsi_queue_data_in,

drivers/xen/xen-scsiback.c

@@ -1404,11 +1404,6 @@ static int scsiback_write_pending(struct se_cmd *se_cmd)
 	return 0;
 }
 
-static int scsiback_write_pending_status(struct se_cmd *se_cmd)
-{
-	return 0;
-}
-
 static void scsiback_set_default_node_attrs(struct se_node_acl *nacl)
 {
 }
@@ -1818,7 +1813,6 @@ static const struct target_core_fabric_ops scsiback_ops = {
 	.sess_get_index			= scsiback_sess_get_index,
 	.sess_get_initiator_sid		= NULL,
 	.write_pending			= scsiback_write_pending,
-	.write_pending_status		= scsiback_write_pending_status,
 	.set_default_node_attributes	= scsiback_set_default_node_attrs,
 	.get_cmd_state			= scsiback_get_cmd_state,
 	.queue_data_in			= scsiback_queue_data_in,

include/target/target_core_fabric.h

@@ -74,7 +74,6 @@ struct target_core_fabric_ops {
 	u32 (*sess_get_initiator_sid)(struct se_session *,
 				      unsigned char *, u32);
 	int (*write_pending)(struct se_cmd *);
-	int (*write_pending_status)(struct se_cmd *);
 	void (*set_default_node_attributes)(struct se_node_acl *);
 	int (*get_cmd_state)(struct se_cmd *);
 	int (*queue_data_in)(struct se_cmd *);