target: More core cleanups from AGrover (round 2)

This patch contains the squashed version of second round of target core
cleanups and simplifications and Andy and Co.   It also contains a handful
of fixes to address bugs the original series and other minor cleanups.

Here is the condensed shortlog:

target: Remove unneeded casts to void*
target: Rename get_lun_for_{cmd,tmr} to lookup_{cmd,tmr}_lun
target: Make t_task a member of se_cmd, not a pointer
target: Handle functions returning "-2"
target: Use cmd->se_dev over cmd->se_lun->lun_se_dev
target: Embed qr in struct se_cmd
target: Replace embedded struct se_queue_req with a list_head
target: Rename list_heads that are nodes in struct se_cmd to "*_node"
target: Fold transport_device_setup_cmd() into lookup_{tmr,cmd}_lun()
target: Make t_mem_list and t_mem_list_bidi members of t_task
target: Add comment & cleanup transport_map_sg_to_mem()
target: Remove unneeded checks in transport_free_pages()

(Roland: Fix se_queue_req removal leftovers OOPs)
(nab: Fix transport_lookup_tmr_lun failure case)
(nab: Fix list_empty(&cmd->t_task.t_mem_bidi_list) inversion bugs)
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/loopback/tcm_loop.c

@@ -118,17 +118,16 @@ static struct se_cmd *tcm_loop_allocate_core_cmd(
 	 * Signal BIDI usage with T_TASK(cmd)->t_tasks_bidi
 	 */
 	if (scsi_bidi_cmnd(sc))
-		se_cmd->t_task->t_tasks_bidi = 1;
+		se_cmd->t_task.t_tasks_bidi = 1;
 	/*
 	 * Locate the struct se_lun pointer and attach it to struct se_cmd
 	 */
-	if (transport_get_lun_for_cmd(se_cmd, tl_cmd->sc->device->lun) < 0) {
+	if (transport_lookup_cmd_lun(se_cmd, tl_cmd->sc->device->lun) < 0) {
 		kmem_cache_free(tcm_loop_cmd_cache, tl_cmd);
 		set_host_byte(sc, DID_NO_CONNECT);
 		return NULL;
 	}
 
-	transport_device_setup_cmd(se_cmd);
 	return se_cmd;
 }
 
@@ -143,17 +142,17 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd)
 	struct tcm_loop_cmd *tl_cmd = container_of(se_cmd,
 				struct tcm_loop_cmd, tl_se_cmd);
 	struct scsi_cmnd *sc = tl_cmd->sc;
-	void *mem_ptr, *mem_bidi_ptr = NULL;
-	u32 sg_no_bidi = 0;
+	struct scatterlist *sgl_bidi = NULL;
+	u32 sgl_bidi_count = 0;
 	int ret;
 	/*
 	 * Allocate the necessary tasks to complete the received CDB+data
 	 */
-	ret = transport_generic_allocate_tasks(se_cmd, tl_cmd->sc->cmnd);
-	if (ret == -1) {
+	ret = transport_generic_allocate_tasks(se_cmd, sc->cmnd);
+	if (ret == -ENOMEM) {
 		/* Out of Resources */
 		return PYX_TRANSPORT_LU_COMM_FAILURE;
-	} else if (ret == -2) {
+	} else if (ret == -EINVAL) {
 		/*
 		 * Handle case for SAM_STAT_RESERVATION_CONFLICT
 		 */
@@ -165,35 +164,24 @@ static int tcm_loop_new_cmd_map(struct se_cmd *se_cmd)
 		 */
 		return PYX_TRANSPORT_USE_SENSE_REASON;
 	}
-	/*
-	 * Setup the struct scatterlist memory from the received
-	 * struct scsi_cmnd.
-	 */
-	if (scsi_sg_count(sc)) {
-		se_cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM;
-		mem_ptr = (void *)scsi_sglist(sc);
+
 	/*
 	 * For BIDI commands, pass in the extra READ buffer
 	 * to transport_generic_map_mem_to_cmd() below..
 	 */
-		if (se_cmd->t_task->t_tasks_bidi) {
+	if (se_cmd->t_task.t_tasks_bidi) {
 		struct scsi_data_buffer *sdb = scsi_in(sc);
 
-			mem_bidi_ptr = (void *)sdb->table.sgl;
-			sg_no_bidi = sdb->table.nents;
-		}
-	} else {
-		/*
-		 * Used for DMA_NONE
-		 */
-		mem_ptr = NULL;
+		sgl_bidi = sdb->table.sgl;
+		sgl_bidi_count = sdb->table.nents;
 	}
+
 	/*
 	 * Map the SG memory into struct se_mem->page linked list using the same
 	 * physical memory at sg->page_link.
 	 */
-	ret = transport_generic_map_mem_to_cmd(se_cmd, mem_ptr,
-			scsi_sg_count(sc), mem_bidi_ptr, sg_no_bidi);
+	ret = transport_generic_map_mem_to_cmd(se_cmd, scsi_sglist(sc),
+			scsi_sg_count(sc), sgl_bidi, sgl_bidi_count);
 	if (ret < 0)
 		return PYX_TRANSPORT_LU_COMM_FAILURE;
 
@@ -384,14 +372,14 @@ static int tcm_loop_device_reset(struct scsi_cmnd *sc)
 	/*
 	 * Allocate the LUN_RESET TMR
 	 */
-	se_cmd->se_tmr_req = core_tmr_alloc_req(se_cmd, (void *)tl_tmr,
+	se_cmd->se_tmr_req = core_tmr_alloc_req(se_cmd, tl_tmr,
 				TMR_LUN_RESET);
 	if (IS_ERR(se_cmd->se_tmr_req))
 		goto release;
 	/*
 	 * Locate the underlying TCM struct se_lun from sc->device->lun
 	 */
-	if (transport_get_lun_for_tmr(se_cmd, sc->device->lun) < 0)
+	if (transport_lookup_tmr_lun(se_cmd, sc->device->lun) < 0)
 		goto release;
 	/*
 	 * Queue the TMR to TCM Core and sleep waiting for tcm_loop_queue_tm_rsp()
@@ -904,7 +892,7 @@ static int tcm_loop_queue_status(struct se_cmd *se_cmd)
 	   ((se_cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ||
 	    (se_cmd->se_cmd_flags & SCF_EMULATED_TASK_SENSE))) {
 
-		memcpy((void *)sc->sense_buffer, (void *)se_cmd->sense_buffer,
+		memcpy(sc->sense_buffer, se_cmd->sense_buffer,
 				SCSI_SENSE_BUFFERSIZE);
 		sc->result = SAM_STAT_CHECK_CONDITION;
 		set_driver_byte(sc, DRIVER_SENSE);
@@ -1054,7 +1042,7 @@ static int tcm_loop_make_nexus(
 	 * transport_register_session()
 	 */
 	__transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl,
-			tl_nexus->se_sess, (void *)tl_nexus);
+			tl_nexus->se_sess, tl_nexus);
 	tl_tpg->tl_hba->tl_nexus = tl_nexus;
 	printk(KERN_INFO "TCM_Loop_ConfigFS: Established I_T Nexus to emulated"
 		" %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
@@ -1242,7 +1230,7 @@ struct se_portal_group *tcm_loop_make_naa_tpg(
 	 * Register the tl_tpg as a emulated SAS TCM Target Endpoint
 	 */
 	ret = core_tpg_register(&tcm_loop_fabric_configfs->tf_ops,
-			wwn, &tl_tpg->tl_se_tpg, (void *)tl_tpg,
+			wwn, &tl_tpg->tl_se_tpg, tl_tpg,
 			TRANSPORT_TPG_TYPE_NORMAL);
 	if (ret < 0)
 		return ERR_PTR(-ENOMEM);

drivers/target/target_core_alua.c

@@ -61,11 +61,11 @@ struct t10_alua_lu_gp *default_lu_gp;
  */
 int core_emulate_report_target_port_groups(struct se_cmd *cmd)
 {
-	struct se_subsystem_dev *su_dev = cmd->se_lun->lun_se_dev->se_sub_dev;
+	struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
 	struct se_port *port;
 	struct t10_alua_tg_pt_gp *tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
-	unsigned char *buf = (unsigned char *)cmd->t_task->t_task_buf;
+	unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
 	u32 rd_len = 0, off = 4; /* Skip over RESERVED area to first
 				    Target port group descriptor */
 
@@ -151,13 +151,13 @@ int core_emulate_report_target_port_groups(struct se_cmd *cmd)
  */
 int core_emulate_set_target_port_groups(struct se_cmd *cmd)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct se_subsystem_dev *su_dev = dev->se_sub_dev;
 	struct se_port *port, *l_port = cmd->se_lun->lun_sep;
 	struct se_node_acl *nacl = cmd->se_sess->se_node_acl;
 	struct t10_alua_tg_pt_gp *tg_pt_gp = NULL, *l_tg_pt_gp;
 	struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem, *l_tg_pt_gp_mem;
-	unsigned char *buf = (unsigned char *)cmd->t_task->t_task_buf;
+	unsigned char *buf = (unsigned char *)cmd->t_task.t_task_buf;
 	unsigned char *ptr = &buf[4]; /* Skip over RESERVED area in header */
 	u32 len = 4; /* Skip over RESERVED area in header */
 	int alua_access_state, primary = 0, rc;

drivers/target/target_core_cdb.c

@@ -65,8 +65,8 @@ static int
 target_emulate_inquiry_std(struct se_cmd *cmd)
 {
 	struct se_lun *lun = cmd->se_lun;
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
-	unsigned char *buf = cmd->t_task->t_task_buf;
+	struct se_device *dev = cmd->se_dev;
+	unsigned char *buf = cmd->t_task.t_task_buf;
 
 	/*
 	 * Make sure we at least have 6 bytes of INQUIRY response
@@ -128,7 +128,7 @@ target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
 	 * Registered Extended LUN WWN has been set via ConfigFS
 	 * during device creation/restart.
 	 */
-	if (cmd->se_lun->lun_se_dev->se_sub_dev->su_dev_flags &
+	if (cmd->se_dev->se_sub_dev->su_dev_flags &
 			SDF_EMULATED_VPD_UNIT_SERIAL) {
 		buf[3] = 3;
 		buf[5] = 0x80;
@@ -143,7 +143,7 @@ target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf)
 static int
 target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 	u16 len = 0;
 
 	buf[1] = 0x80;
@@ -176,7 +176,7 @@ target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf)
 static int
 target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct se_lun *lun = cmd->se_lun;
 	struct se_port *port = NULL;
 	struct se_portal_group *tpg = NULL;
@@ -477,7 +477,7 @@ target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
 	buf[5] = 0x07;
 
 	/* If WriteCache emulation is enabled, set V_SUP */
-	if (cmd->se_lun->lun_se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
+	if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0)
 		buf[6] = 0x01;
 	return 0;
 }
@@ -486,7 +486,7 @@ target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf)
 static int
 target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 	int have_tp = 0;
 
 	/*
@@ -568,7 +568,7 @@ target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
 static int
 target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 
 	/*
 	 * From sbc3r22 section 6.5.4 Thin Provisioning VPD page:
@@ -620,9 +620,9 @@ target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf)
 static int
 target_emulate_inquiry(struct se_cmd *cmd)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
-	unsigned char *buf = cmd->t_task->t_task_buf;
-	unsigned char *cdb = cmd->t_task->t_task_cdb;
+	struct se_device *dev = cmd->se_dev;
+	unsigned char *buf = cmd->t_task.t_task_buf;
+	unsigned char *cdb = cmd->t_task.t_task_cdb;
 
 	if (!(cdb[1] & 0x1))
 		return target_emulate_inquiry_std(cmd);
@@ -665,8 +665,8 @@ target_emulate_inquiry(struct se_cmd *cmd)
 static int
 target_emulate_readcapacity(struct se_cmd *cmd)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
-	unsigned char *buf = cmd->t_task->t_task_buf;
+	struct se_device *dev = cmd->se_dev;
+	unsigned char *buf = cmd->t_task.t_task_buf;
 	unsigned long long blocks_long = dev->transport->get_blocks(dev);
 	u32 blocks;
 
@@ -695,8 +695,8 @@ target_emulate_readcapacity(struct se_cmd *cmd)
 static int
 target_emulate_readcapacity_16(struct se_cmd *cmd)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
-	unsigned char *buf = cmd->t_task->t_task_buf;
+	struct se_device *dev = cmd->se_dev;
+	unsigned char *buf = cmd->t_task.t_task_buf;
 	unsigned long long blocks = dev->transport->get_blocks(dev);
 
 	buf[0] = (blocks >> 56) & 0xff;
@@ -830,9 +830,9 @@ target_modesense_dpofua(unsigned char *buf, int type)
 static int
 target_emulate_modesense(struct se_cmd *cmd, int ten)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
-	char *cdb = cmd->t_task->t_task_cdb;
-	unsigned char *rbuf = cmd->t_task->t_task_buf;
+	struct se_device *dev = cmd->se_dev;
+	char *cdb = cmd->t_task.t_task_cdb;
+	unsigned char *rbuf = cmd->t_task.t_task_buf;
 	int type = dev->transport->get_device_type(dev);
 	int offset = (ten) ? 8 : 4;
 	int length = 0;
@@ -903,8 +903,8 @@ target_emulate_modesense(struct se_cmd *cmd, int ten)
 static int
 target_emulate_request_sense(struct se_cmd *cmd)
 {
-	unsigned char *cdb = cmd->t_task->t_task_cdb;
-	unsigned char *buf = cmd->t_task->t_task_buf;
+	unsigned char *cdb = cmd->t_task.t_task_cdb;
+	unsigned char *buf = cmd->t_task.t_task_buf;
 	u8 ua_asc = 0, ua_ascq = 0;
 
 	if (cdb[1] & 0x01) {
@@ -964,9 +964,9 @@ static int
 target_emulate_unmap(struct se_task *task)
 {
 	struct se_cmd *cmd = task->task_se_cmd;
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
-	unsigned char *buf = cmd->t_task->t_task_buf, *ptr = NULL;
-	unsigned char *cdb = &cmd->t_task->t_task_cdb[0];
+	struct se_device *dev = cmd->se_dev;
+	unsigned char *buf = cmd->t_task.t_task_buf, *ptr = NULL;
+	unsigned char *cdb = &cmd->t_task.t_task_cdb[0];
 	sector_t lba;
 	unsigned int size = cmd->data_length, range;
 	int ret, offset;
@@ -1011,8 +1011,8 @@ static int
 target_emulate_write_same(struct se_task *task)
 {
 	struct se_cmd *cmd = task->task_se_cmd;
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
-	sector_t lba = cmd->t_task->t_task_lba;
+	struct se_device *dev = cmd->se_dev;
+	sector_t lba = cmd->t_task.t_task_lba;
 	unsigned int range;
 	int ret;
 
@@ -1036,11 +1036,11 @@ int
 transport_emulate_control_cdb(struct se_task *task)
 {
 	struct se_cmd *cmd = task->task_se_cmd;
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 	unsigned short service_action;
 	int ret = 0;
 
-	switch (cmd->t_task->t_task_cdb[0]) {
+	switch (cmd->t_task.t_task_cdb[0]) {
 	case INQUIRY:
 		ret = target_emulate_inquiry(cmd);
 		break;
@@ -1054,13 +1054,13 @@ transport_emulate_control_cdb(struct se_task *task)
 		ret = target_emulate_modesense(cmd, 1);
 		break;
 	case SERVICE_ACTION_IN:
-		switch (cmd->t_task->t_task_cdb[1] & 0x1f) {
+		switch (cmd->t_task.t_task_cdb[1] & 0x1f) {
 		case SAI_READ_CAPACITY_16:
 			ret = target_emulate_readcapacity_16(cmd);
 			break;
 		default:
 			printk(KERN_ERR "Unsupported SA: 0x%02x\n",
-				cmd->t_task->t_task_cdb[1] & 0x1f);
+				cmd->t_task.t_task_cdb[1] & 0x1f);
 			return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
 		}
 		break;
@@ -1085,7 +1085,7 @@ transport_emulate_control_cdb(struct se_task *task)
 		break;
 	case VARIABLE_LENGTH_CMD:
 		service_action =
-			get_unaligned_be16(&cmd->t_task->t_task_cdb[8]);
+			get_unaligned_be16(&cmd->t_task.t_task_cdb[8]);
 		switch (service_action) {
 		case WRITE_SAME_32:
 			if (!dev->transport->do_discard) {
@@ -1124,7 +1124,7 @@ transport_emulate_control_cdb(struct se_task *task)
 		break;
 	default:
 		printk(KERN_ERR "Unsupported SCSI Opcode: 0x%02x for %s\n",
-			cmd->t_task->t_task_cdb[0], dev->transport->name);
+			cmd->t_task.t_task_cdb[0], dev->transport->name);
 		return PYX_TRANSPORT_UNKNOWN_SAM_OPCODE;
 	}
 

drivers/target/target_core_configfs.c

@@ -2037,7 +2037,7 @@ static ssize_t target_core_dev_show(struct config_item *item,
 	if (!(tc_attr->show))
 		return -EINVAL;
 
-	return tc_attr->show((void *)se_dev, page);
+	return tc_attr->show(se_dev, page);
 }
 
 static ssize_t target_core_dev_store(struct config_item *item,
@@ -2053,7 +2053,7 @@ static ssize_t target_core_dev_store(struct config_item *item,
 	if (!(tc_attr->store))
 		return -EINVAL;
 
-	return tc_attr->store((void *)se_dev, page, count);
+	return tc_attr->store(se_dev, page, count);
 }
 
 static struct configfs_item_operations target_core_dev_item_ops = {

drivers/target/target_core_device.c

@@ -59,15 +59,12 @@ static struct se_subsystem_dev *lun0_su_dev;
 /* not static, needed by tpg.c */
 struct se_device *g_lun0_dev;
 
-int transport_get_lun_for_cmd(
-	struct se_cmd *se_cmd,
-	u32 unpacked_lun)
+int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 {
-	struct se_dev_entry *deve;
 	struct se_lun *se_lun = NULL;
 	struct se_session *se_sess = se_cmd->se_sess;
+	struct se_device *dev;
 	unsigned long flags;
-	int read_only = 0;
 
 	if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
 		se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
@@ -76,46 +73,42 @@ int transport_get_lun_for_cmd(
 	}
 
 	spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
-	deve = se_cmd->se_deve =
-			&se_sess->se_node_acl->device_list[unpacked_lun];
-	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
-		if (se_cmd) {
+	se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
+	if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
+		struct se_dev_entry *deve = se_cmd->se_deve;
+
 		deve->total_cmds++;
 		deve->total_bytes += se_cmd->data_length;
 
-			if (se_cmd->data_direction == DMA_TO_DEVICE) {
-				if (deve->lun_flags &
-						TRANSPORT_LUNFLAGS_READ_ONLY) {
-					read_only = 1;
-					goto out;
+		if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
+		    (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
+			se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
+			se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
+			printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
+				" Access for 0x%08x\n",
+				se_cmd->se_tfo->get_fabric_name(),
+				unpacked_lun);
+			spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
+			return -EACCES;
 		}
+
+		if (se_cmd->data_direction == DMA_TO_DEVICE)
 			deve->write_bytes += se_cmd->data_length;
-			} else if (se_cmd->data_direction ==
-				   DMA_FROM_DEVICE) {
+		else if (se_cmd->data_direction == DMA_FROM_DEVICE)
 			deve->read_bytes += se_cmd->data_length;
-			}
-		}
+
 		deve->deve_cmds++;
 
-		se_lun = se_cmd->se_lun = deve->se_lun;
+		se_lun = deve->se_lun;
+		se_cmd->se_lun = deve->se_lun;
 		se_cmd->pr_res_key = deve->pr_res_key;
 		se_cmd->orig_fe_lun = unpacked_lun;
 		se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev;
 		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 	}
-out:
 	spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
 
 	if (!se_lun) {
-		if (read_only) {
-			se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
-			se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
-			printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
-				" Access for 0x%08x\n",
-				se_cmd->se_tfo->get_fabric_name(),
-				unpacked_lun);
-			return -EACCES;
-		} else {
 		/*
 		 * Use the se_portal_group->tpg_virt_lun0 to allow for
 		 * REPORT_LUNS, et al to be returned when no active
@@ -139,28 +132,28 @@ int transport_get_lun_for_cmd(
 			se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 			return -EACCES;
 		}
-#if 0
-			printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
-				se_cmd->se_tfo->get_fabric_name());
-#endif
-			se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
+
+		se_lun = &se_sess->se_tpg->tpg_virt_lun0;
+		se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
 		se_cmd->orig_fe_lun = 0;
 		se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev;
 		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
 	}
-	}
 	/*
 	 * Determine if the struct se_lun is online.
+	 * FIXME: Check for LUN_RESET + UNIT Attention
 	 */
-/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
 	if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 		se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
 		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 		return -ENODEV;
 	}
 
-	{
-	struct se_device *dev = se_lun->lun_se_dev;
+	/* Directly associate cmd with se_dev */
+	se_cmd->se_dev = se_lun->lun_se_dev;
+
+	/* TODO: get rid of this and use atomics for stats */
+	dev = se_lun->lun_se_dev;
 	spin_lock_irq(&dev->stats_lock);
 	dev->num_cmds++;
 	if (se_cmd->data_direction == DMA_TO_DEVICE)
@@ -168,30 +161,22 @@ int transport_get_lun_for_cmd(
 	else if (se_cmd->data_direction == DMA_FROM_DEVICE)
 		dev->read_bytes += se_cmd->data_length;
 	spin_unlock_irq(&dev->stats_lock);
-	}
 
 	/*
 	 * Add the iscsi_cmd_t to the struct se_lun's cmd list.  This list is used
 	 * for tracking state of struct se_cmds during LUN shutdown events.
 	 */
 	spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
-	list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
-	atomic_set(&se_cmd->t_task->transport_lun_active, 1);
-#if 0
-	printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
-		se_cmd->se_tfo->get_task_tag(se_cmd), se_lun->unpacked_lun);
-#endif
+	list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
+	atomic_set(&se_cmd->t_task.transport_lun_active, 1);
 	spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
 
 	return 0;
 }
-EXPORT_SYMBOL(transport_get_lun_for_cmd);
+EXPORT_SYMBOL(transport_lookup_cmd_lun);
 
-int transport_get_lun_for_tmr(
-	struct se_cmd *se_cmd,
-	u32 unpacked_lun)
+int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
 {
-	struct se_device *dev = NULL;
 	struct se_dev_entry *deve;
 	struct se_lun *se_lun = NULL;
 	struct se_session *se_sess = se_cmd->se_sess;
@@ -204,15 +189,16 @@ int transport_get_lun_for_tmr(
 	}
 
 	spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
-	deve = se_cmd->se_deve =
-			&se_sess->se_node_acl->device_list[unpacked_lun];
+	se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
+	deve = se_cmd->se_deve;
+
 	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
-		se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
-		dev = se_lun->lun_se_dev;
+		se_tmr->tmr_lun = deve->se_lun;
+		se_cmd->se_lun = deve->se_lun;
+		se_lun = deve->se_lun;
 		se_cmd->pr_res_key = deve->pr_res_key;
 		se_cmd->orig_fe_lun = unpacked_lun;
-		se_cmd->se_orig_obj_ptr = se_cmd->se_lun->lun_se_dev;
-/*		se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
+		se_cmd->se_orig_obj_ptr = se_cmd->se_dev;
 	}
 	spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
 
@@ -226,21 +212,24 @@ int transport_get_lun_for_tmr(
 	}
 	/*
 	 * Determine if the struct se_lun is online.
+	 * FIXME: Check for LUN_RESET + UNIT Attention
 	 */
-/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
 	if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
 		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 		return -ENODEV;
 	}
-	se_tmr->tmr_dev = dev;
 
-	spin_lock(&dev->se_tmr_lock);
-	list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
-	spin_unlock(&dev->se_tmr_lock);
+	/* Directly associate cmd with se_dev */
+	se_cmd->se_dev = se_lun->lun_se_dev;
+	se_tmr->tmr_dev = se_lun->lun_se_dev;
+
+	spin_lock(&se_tmr->tmr_dev->se_tmr_lock);
+	list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
+	spin_unlock(&se_tmr->tmr_dev->se_tmr_lock);
 
 	return 0;
 }
-EXPORT_SYMBOL(transport_get_lun_for_tmr);
+EXPORT_SYMBOL(transport_lookup_tmr_lun);
 
 /*
  * This function is called from core_scsi3_emulate_pro_register_and_move()
@@ -667,10 +656,10 @@ int transport_core_report_lun_response(struct se_cmd *se_cmd)
 	struct se_lun *se_lun;
 	struct se_session *se_sess = se_cmd->se_sess;
 	struct se_task *se_task;
-	unsigned char *buf = se_cmd->t_task->t_task_buf;
+	unsigned char *buf = se_cmd->t_task.t_task_buf;
 	u32 cdb_offset = 0, lun_count = 0, offset = 8, i;
 
-	list_for_each_entry(se_task, &se_cmd->t_task->t_task_list, t_list)
+	list_for_each_entry(se_task, &se_cmd->t_task.t_task_list, t_list)
 		break;
 
 	if (!(se_task)) {

drivers/target/target_core_file.c

@@ -223,7 +223,7 @@ static struct se_device *fd_create_virtdevice(
 	dev_limits.queue_depth = FD_DEVICE_QUEUE_DEPTH;
 
 	dev = transport_add_device_to_core_hba(hba, &fileio_template,
-				se_dev, dev_flags, (void *)fd_dev,
+				se_dev, dev_flags, fd_dev,
 				&dev_limits, "FILEIO", FD_VERSION);
 	if (!(dev))
 		goto fail;
@@ -279,7 +279,7 @@ fd_alloc_task(struct se_cmd *cmd)
 		return NULL;
 	}
 
-	fd_req->fd_dev = cmd->se_lun->lun_se_dev->dev_ptr;
+	fd_req->fd_dev = cmd->se_dev->dev_ptr;
 
 	return &fd_req->fd_task;
 }
@@ -377,7 +377,7 @@ static void fd_emulate_sync_cache(struct se_task *task)
 	struct se_cmd *cmd = task->task_se_cmd;
 	struct se_device *dev = cmd->se_dev;
 	struct fd_dev *fd_dev = dev->dev_ptr;
-	int immed = (cmd->t_task->t_task_cdb[1] & 0x2);
+	int immed = (cmd->t_task.t_task_cdb[1] & 0x2);
 	loff_t start, end;
 	int ret;
 
@@ -391,11 +391,11 @@ static void fd_emulate_sync_cache(struct se_task *task)
 	/*
 	 * Determine if we will be flushing the entire device.
 	 */
-	if (cmd->t_task->t_task_lba == 0 && cmd->data_length == 0) {
+	if (cmd->t_task.t_task_lba == 0 && cmd->data_length == 0) {
 		start = 0;
 		end = LLONG_MAX;
 	} else {
-		start = cmd->t_task->t_task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
+		start = cmd->t_task.t_task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
 		if (cmd->data_length)
 			end = start + cmd->data_length;
 		else
@@ -475,7 +475,7 @@ static int fd_do_task(struct se_task *task)
 		if (ret > 0 &&
 		    dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0 &&
 		    dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
-		    cmd->t_task->t_tasks_fua) {
+		    cmd->t_task.t_tasks_fua) {
 			/*
 			 * We might need to be a bit smarter here
 			 * and return some sense data to let the initiator

drivers/target/target_core_iblock.c

@@ -74,7 +74,7 @@ static int iblock_attach_hba(struct se_hba *hba, u32 host_id)
 
 	ib_host->iblock_host_id = host_id;
 
-	hba->hba_ptr = (void *) ib_host;
+	hba->hba_ptr = ib_host;
 
 	printk(KERN_INFO "CORE_HBA[%d] - TCM iBlock HBA Driver %s on"
 		" Generic Target Core Stack %s\n", hba->hba_id,
@@ -172,7 +172,7 @@ static struct se_device *iblock_create_virtdevice(
 	ib_dev->ibd_bd = bd;
 
 	dev = transport_add_device_to_core_hba(hba,
-			&iblock_template, se_dev, dev_flags, (void *)ib_dev,
+			&iblock_template, se_dev, dev_flags, ib_dev,
 			&dev_limits, "IBLOCK", IBLOCK_VERSION);
 	if (!(dev))
 		goto failed;
@@ -240,7 +240,7 @@ iblock_alloc_task(struct se_cmd *cmd)
 		return NULL;
 	}
 
-	ib_req->ib_dev = cmd->se_lun->lun_se_dev->dev_ptr;
+	ib_req->ib_dev = cmd->se_dev->dev_ptr;
 	atomic_set(&ib_req->ib_bio_cnt, 0);
 	return &ib_req->ib_task;
 }
@@ -331,7 +331,7 @@ static void iblock_emulate_sync_cache(struct se_task *task)
 {
 	struct se_cmd *cmd = task->task_se_cmd;
 	struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
-	int immed = (cmd->t_task->t_task_cdb[1] & 0x2);
+	int immed = (cmd->t_task.t_task_cdb[1] & 0x2);
 	sector_t error_sector;
 	int ret;
 
@@ -400,7 +400,7 @@ static int iblock_do_task(struct se_task *task)
 		 */
 		if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache == 0 ||
 		    (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0 &&
-		     task->task_se_cmd->t_task->t_tasks_fua))
+		     task->task_se_cmd->t_task.t_tasks_fua))
 			rw = WRITE_FUA;
 		else
 			rw = WRITE;
@@ -593,7 +593,7 @@ static struct bio *iblock_get_bio(
 	DEBUG_IBLOCK("Allocated bio: %p task_size: %u\n", bio, task->task_size);
 
 	bio->bi_bdev = ib_dev->ibd_bd;
-	bio->bi_private = (void *) task;
+	bio->bi_private = task;
 	bio->bi_destructor = iblock_bio_destructor;
 	bio->bi_end_io = &iblock_bio_done;
 	bio->bi_sector = lba;
@@ -608,7 +608,7 @@ static struct bio *iblock_get_bio(
 static int iblock_map_task_SG(struct se_task *task)
 {
 	struct se_cmd *cmd = task->task_se_cmd;
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct iblock_dev *ib_dev = task->se_dev->dev_ptr;
 	struct iblock_req *ib_req = IBLOCK_REQ(task);
 	struct bio *bio = NULL, *hbio = NULL, *tbio = NULL;

drivers/target/target_core_pscsi.c

@@ -72,7 +72,7 @@ static int pscsi_attach_hba(struct se_hba *hba, u32 host_id)
 	phv->phv_host_id = host_id;
 	phv->phv_mode = PHV_VIRUTAL_HOST_ID;
 
-	hba->hba_ptr = (void *)phv;
+	hba->hba_ptr = phv;
 
 	printk(KERN_INFO "CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
 		" Generic Target Core Stack %s\n", hba->hba_id,
@@ -355,7 +355,7 @@ static struct se_device *pscsi_add_device_to_list(
 	pdv->pdv_sd = sd;
 
 	dev = transport_add_device_to_core_hba(hba, &pscsi_template,
-				se_dev, dev_flags, (void *)pdv,
+				se_dev, dev_flags, pdv,
 				&dev_limits, NULL, NULL);
 	if (!(dev)) {
 		pdv->pdv_sd = NULL;
@@ -394,7 +394,7 @@ static void *pscsi_allocate_virtdevice(struct se_hba *hba, const char *name)
 	pdv->pdv_se_hba = hba;
 
 	printk(KERN_INFO "PSCSI: Allocated pdv: %p for %s\n", pdv, name);
-	return (void *)pdv;
+	return pdv;
 }
 
 /*
@@ -697,7 +697,7 @@ static int pscsi_transport_complete(struct se_task *task)
 
 		if (task->task_se_cmd->se_deve->lun_flags &
 				TRANSPORT_LUNFLAGS_READ_ONLY) {
-			unsigned char *buf = task->task_se_cmd->t_task->t_task_buf;
+			unsigned char *buf = task->task_se_cmd->t_task.t_task_buf;
 
 			if (cdb[0] == MODE_SENSE_10) {
 				if (!(buf[3] & 0x80))
@@ -763,7 +763,7 @@ static struct se_task *
 pscsi_alloc_task(struct se_cmd *cmd)
 {
 	struct pscsi_plugin_task *pt;
-	unsigned char *cdb = cmd->t_task->t_task_cdb;
+	unsigned char *cdb = cmd->t_task.t_task_cdb;
 
 	pt = kzalloc(sizeof(struct pscsi_plugin_task), GFP_KERNEL);
 	if (!pt) {
@@ -776,7 +776,7 @@ pscsi_alloc_task(struct se_cmd *cmd)
 	 * allocate the extended CDB buffer for per struct se_task context
 	 * pt->pscsi_cdb now.
 	 */
-	if (cmd->t_task->t_task_cdb != cmd->t_task->__t_task_cdb) {
+	if (cmd->t_task.t_task_cdb != cmd->t_task.__t_task_cdb) {
 
 		pt->pscsi_cdb = kzalloc(scsi_command_size(cdb), GFP_KERNEL);
 		if (!(pt->pscsi_cdb)) {
@@ -812,7 +812,7 @@ static inline void pscsi_blk_init_request(
 	 * also set the end_io_data pointer.to struct se_task.
 	 */
 	req->end_io = pscsi_req_done;
-	req->end_io_data = (void *)task;
+	req->end_io_data = task;
 	/*
 	 * Load the referenced struct se_task's SCSI CDB into
 	 * include/linux/blkdev.h:struct request->cmd
@@ -822,7 +822,7 @@ static inline void pscsi_blk_init_request(
 	/*
 	 * Setup pointer for outgoing sense data.
 	 */
-	req->sense = (void *)&pt->pscsi_sense[0];
+	req->sense = &pt->pscsi_sense[0];
 	req->sense_len = 0;
 }
 
@@ -889,7 +889,7 @@ static void pscsi_free_task(struct se_task *task)
 	 * Release the extended CDB allocation from pscsi_alloc_task()
 	 * if one exists.
 	 */
-	if (cmd->t_task->t_task_cdb != cmd->t_task->__t_task_cdb)
+	if (cmd->t_task.t_task_cdb != cmd->t_task.__t_task_cdb)
 		kfree(pt->pscsi_cdb);
 	/*
 	 * We do not release the bio(s) here associated with this task, as
@@ -1266,7 +1266,7 @@ static int pscsi_map_task_non_SG(struct se_task *task)
 		return 0;
 
 	ret = blk_rq_map_kern(pdv->pdv_sd->request_queue,
-			pt->pscsi_req, cmd->t_task->t_task_buf,
+			pt->pscsi_req, cmd->t_task.t_task_buf,
 			task->task_size, GFP_KERNEL);
 	if (ret < 0) {
 		printk(KERN_ERR "PSCSI: blk_rq_map_kern() failed: %d\n", ret);

drivers/target/target_core_rd.c

@@ -66,7 +66,7 @@ static int rd_attach_hba(struct se_hba *hba, u32 host_id)
 
 	rd_host->rd_host_id = host_id;
 
-	hba->hba_ptr = (void *) rd_host;
+	hba->hba_ptr = rd_host;
 
 	printk(KERN_INFO "CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on"
 		" Generic Target Core Stack %s\n", hba->hba_id,
@@ -271,7 +271,7 @@ static struct se_device *rd_create_virtdevice(
 
 	dev = transport_add_device_to_core_hba(hba,
 			(rd_dev->rd_direct) ? &rd_dr_template :
-			&rd_mcp_template, se_dev, dev_flags, (void *)rd_dev,
+			&rd_mcp_template, se_dev, dev_flags, rd_dev,
 			&dev_limits, prod, rev);
 	if (!(dev))
 		goto fail;
@@ -336,7 +336,7 @@ rd_alloc_task(struct se_cmd *cmd)
 		printk(KERN_ERR "Unable to allocate struct rd_request\n");
 		return NULL;
 	}
-	rd_req->rd_dev = cmd->se_lun->lun_se_dev->dev_ptr;
+	rd_req->rd_dev = cmd->se_dev->dev_ptr;
 
 	return &rd_req->rd_task;
 }
@@ -737,7 +737,7 @@ static int rd_DIRECT_with_offset(
 	}
 
 out:
-	task->task_se_cmd->t_task->t_tasks_se_num += *se_mem_cnt;
+	task->task_se_cmd->t_task.t_tasks_se_num += *se_mem_cnt;
 #ifdef DEBUG_RAMDISK_DR
 	printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
 			*se_mem_cnt);
@@ -819,7 +819,7 @@ static int rd_DIRECT_without_offset(
 	}
 
 out:
-	task->task_se_cmd->t_task->t_tasks_se_num += *se_mem_cnt;
+	task->task_se_cmd->t_task.t_tasks_se_num += *se_mem_cnt;
 #ifdef DEBUG_RAMDISK_DR
 	printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
 			*se_mem_cnt);
@@ -880,14 +880,14 @@ static int rd_DIRECT_do_se_mem_map(
 	 * across multiple struct se_task->task_sg[].
 	 */
 	ret = transport_init_task_sg(task,
-			list_entry(cmd->t_task->t_mem_list->next,
+			list_first_entry(&cmd->t_task.t_mem_list,
 				   struct se_mem, se_list),
 			task_offset);
 	if (ret <= 0)
 		return ret;
 
 	return transport_map_mem_to_sg(task, se_mem_list, task->task_sg,
-			list_entry(cmd->t_task->t_mem_list->next,
+			list_first_entry(&cmd->t_task.t_mem_list,
 				   struct se_mem, se_list),
 			out_se_mem, se_mem_cnt, task_offset_in);
 }

drivers/target/target_core_tmr.c

@@ -113,15 +113,14 @@ int core_tmr_lun_reset(
 	struct list_head *preempt_and_abort_list,
 	struct se_cmd *prout_cmd)
 {
-	struct se_cmd *cmd;
-	struct se_queue_req *qr, *qr_tmp;
+	struct se_cmd *cmd, *tcmd;
 	struct se_node_acl *tmr_nacl = NULL;
 	struct se_portal_group *tmr_tpg = NULL;
 	struct se_queue_obj *qobj = &dev->dev_queue_obj;
 	struct se_tmr_req *tmr_p, *tmr_pp;
 	struct se_task *task, *task_tmp;
 	unsigned long flags;
-	int fe_count, state, tas;
+	int fe_count, tas;
 	/*
 	 * TASK_ABORTED status bit, this is configurable via ConfigFS
 	 * struct se_device attributes.  spc4r17 section 7.4.6 Control mode page
@@ -179,14 +178,14 @@ int core_tmr_lun_reset(
 			continue;
 		spin_unlock(&dev->se_tmr_lock);
 
-		spin_lock_irqsave(&cmd->t_task->t_state_lock, flags);
-		if (!(atomic_read(&cmd->t_task->t_transport_active))) {
-			spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags);
+		spin_lock_irqsave(&cmd->t_task.t_state_lock, flags);
+		if (!(atomic_read(&cmd->t_task.t_transport_active))) {
+			spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
 			spin_lock(&dev->se_tmr_lock);
 			continue;
 		}
 		if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) {
-			spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags);
+			spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
 			spin_lock(&dev->se_tmr_lock);
 			continue;
 		}
@@ -194,7 +193,7 @@ int core_tmr_lun_reset(
 			" Response: 0x%02x, t_state: %d\n",
 			(preempt_and_abort_list) ? "Preempt" : "", tmr_p,
 			tmr_p->function, tmr_p->response, cmd->t_state);
-		spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags);
+		spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
 
 		transport_cmd_finish_abort_tmr(cmd);
 		spin_lock(&dev->se_tmr_lock);
@@ -230,12 +229,6 @@ int core_tmr_lun_reset(
 		}
 		cmd = task->task_se_cmd;
 
-		if (!cmd->t_task) {
-			printk(KERN_ERR "cmd->t_task is NULL for task: %p cmd:"
-				" %p ITT: 0x%08x\n", task, cmd,
-				cmd->se_tfo->get_task_tag(cmd));
-			continue;
-		}
 		/*
 		 * For PREEMPT_AND_ABORT usage, only process commands
 		 * with a matching reservation key.
@@ -254,38 +247,38 @@ int core_tmr_lun_reset(
 		atomic_set(&task->task_state_active, 0);
 		spin_unlock_irqrestore(&dev->execute_task_lock, flags);
 
-		spin_lock_irqsave(&cmd->t_task->t_state_lock, flags);
+		spin_lock_irqsave(&cmd->t_task.t_state_lock, flags);
 		DEBUG_LR("LUN_RESET: %s cmd: %p task: %p"
 			" ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/"
 			"def_t_state: %d/%d cdb: 0x%02x\n",
 			(preempt_and_abort_list) ? "Preempt" : "", cmd, task,
 			cmd->se_tfo->get_task_tag(cmd), 0,
 			cmd->se_tfo->get_cmd_state(cmd), cmd->t_state,
-			cmd->deferred_t_state, cmd->t_task->t_task_cdb[0]);
+			cmd->deferred_t_state, cmd->t_task.t_task_cdb[0]);
 		DEBUG_LR("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
 			" t_task_cdbs: %d t_task_cdbs_left: %d"
 			" t_task_cdbs_sent: %d -- t_transport_active: %d"
 			" t_transport_stop: %d t_transport_sent: %d\n",
 			cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key,
-			cmd->t_task->t_task_cdbs,
-			atomic_read(&cmd->t_task->t_task_cdbs_left),
-			atomic_read(&cmd->t_task->t_task_cdbs_sent),
-			atomic_read(&cmd->t_task->t_transport_active),
-			atomic_read(&cmd->t_task->t_transport_stop),
-			atomic_read(&cmd->t_task->t_transport_sent));
+			cmd->t_task.t_task_cdbs,
+			atomic_read(&cmd->t_task.t_task_cdbs_left),
+			atomic_read(&cmd->t_task.t_task_cdbs_sent),
+			atomic_read(&cmd->t_task.t_transport_active),
+			atomic_read(&cmd->t_task.t_transport_stop),
+			atomic_read(&cmd->t_task.t_transport_sent));
 
 		if (atomic_read(&task->task_active)) {
 			atomic_set(&task->task_stop, 1);
 			spin_unlock_irqrestore(
-				&cmd->t_task->t_state_lock, flags);
+				&cmd->t_task.t_state_lock, flags);
 
 			DEBUG_LR("LUN_RESET: Waiting for task: %p to shutdown"
 				" for dev: %p\n", task, dev);
 			wait_for_completion(&task->task_stop_comp);
 			DEBUG_LR("LUN_RESET Completed task: %p shutdown for"
 				" dev: %p\n", task, dev);
-			spin_lock_irqsave(&cmd->t_task->t_state_lock, flags);
-			atomic_dec(&cmd->t_task->t_task_cdbs_left);
+			spin_lock_irqsave(&cmd->t_task.t_state_lock, flags);
+			atomic_dec(&cmd->t_task.t_task_cdbs_left);
 
 			atomic_set(&task->task_active, 0);
 			atomic_set(&task->task_stop, 0);
@@ -295,24 +288,24 @@ int core_tmr_lun_reset(
 		}
 		__transport_stop_task_timer(task, &flags);
 
-		if (!(atomic_dec_and_test(&cmd->t_task->t_task_cdbs_ex_left))) {
+		if (!(atomic_dec_and_test(&cmd->t_task.t_task_cdbs_ex_left))) {
 			spin_unlock_irqrestore(
-					&cmd->t_task->t_state_lock, flags);
+					&cmd->t_task.t_state_lock, flags);
 			DEBUG_LR("LUN_RESET: Skipping task: %p, dev: %p for"
 				" t_task_cdbs_ex_left: %d\n", task, dev,
-				atomic_read(&cmd->t_task->t_task_cdbs_ex_left));
+				atomic_read(&cmd->t_task.t_task_cdbs_ex_left));
 
 			spin_lock_irqsave(&dev->execute_task_lock, flags);
 			continue;
 		}
-		fe_count = atomic_read(&cmd->t_task->t_fe_count);
+		fe_count = atomic_read(&cmd->t_task.t_fe_count);
 
-		if (atomic_read(&cmd->t_task->t_transport_active)) {
+		if (atomic_read(&cmd->t_task.t_transport_active)) {
 			DEBUG_LR("LUN_RESET: got t_transport_active = 1 for"
 				" task: %p, t_fe_count: %d dev: %p\n", task,
 				fe_count, dev);
-			atomic_set(&cmd->t_task->t_transport_aborted, 1);
-			spin_unlock_irqrestore(&cmd->t_task->t_state_lock,
+			atomic_set(&cmd->t_task.t_transport_aborted, 1);
+			spin_unlock_irqrestore(&cmd->t_task.t_state_lock,
 						flags);
 			core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
 
@@ -321,8 +314,8 @@ int core_tmr_lun_reset(
 		}
 		DEBUG_LR("LUN_RESET: Got t_transport_active = 0 for task: %p,"
 			" t_fe_count: %d dev: %p\n", task, fe_count, dev);
-		atomic_set(&cmd->t_task->t_transport_aborted, 1);
-		spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags);
+		atomic_set(&cmd->t_task.t_transport_aborted, 1);
+		spin_unlock_irqrestore(&cmd->t_task.t_state_lock, flags);
 		core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
 
 		spin_lock_irqsave(&dev->execute_task_lock, flags);
@@ -337,20 +330,7 @@ int core_tmr_lun_reset(
 	 * reference, otherwise the struct se_cmd is released.
 	 */
 	spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
-	list_for_each_entry_safe(qr, qr_tmp, &qobj->qobj_list, qr_list) {
-		cmd = (struct se_cmd *)qr->cmd;
-		if (!(cmd)) {
-			/*
-			 * Skip these for non PREEMPT_AND_ABORT usage..
-			 */
-			if (preempt_and_abort_list != NULL)
-				continue;
-
-			atomic_dec(&qobj->queue_cnt);
-			list_del(&qr->qr_list);
-			kfree(qr);
-			continue;
-		}
+	list_for_each_entry_safe(cmd, tcmd, &qobj->qobj_list, se_queue_node) {
 		/*
 		 * For PREEMPT_AND_ABORT usage, only process commands
 		 * with a matching reservation key.
@@ -365,18 +345,15 @@ int core_tmr_lun_reset(
 		if (prout_cmd == cmd)
 			continue;
 
-		atomic_dec(&cmd->t_task->t_transport_queue_active);
+		atomic_dec(&cmd->t_task.t_transport_queue_active);
 		atomic_dec(&qobj->queue_cnt);
-		list_del(&qr->qr_list);
+		list_del(&cmd->se_queue_node);
 		spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
 
-		state = qr->state;
-		kfree(qr);
-
 		DEBUG_LR("LUN_RESET: %s from Device Queue: cmd: %p t_state:"
 			" %d t_fe_count: %d\n", (preempt_and_abort_list) ?
-			"Preempt" : "", cmd, state,
-			atomic_read(&cmd->t_task->t_fe_count));
+			"Preempt" : "", cmd, cmd->t_state,
+			atomic_read(&cmd->t_task.t_fe_count));
 		/*
 		 * Signal that the command has failed via cmd->se_cmd_flags,
 		 * and call TFO->new_cmd_failure() to wakeup any fabric
@@ -388,7 +365,7 @@ int core_tmr_lun_reset(
 		transport_new_cmd_failure(cmd);
 
 		core_tmr_handle_tas_abort(tmr_nacl, cmd, tas,
-				atomic_read(&cmd->t_task->t_fe_count));
+				atomic_read(&cmd->t_task.t_fe_count));
 		spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
 	}
 	spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);

drivers/target/target_core_ua.c

@@ -208,7 +208,7 @@ void core_scsi3_ua_for_check_condition(
 	u8 *asc,
 	u8 *ascq)
 {
-	struct se_device *dev = cmd->se_lun->lun_se_dev;
+	struct se_device *dev = cmd->se_dev;
 	struct se_dev_entry *deve;
 	struct se_session *sess = cmd->se_sess;
 	struct se_node_acl *nacl;
@@ -270,7 +270,7 @@ void core_scsi3_ua_for_check_condition(
 		nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
 		(dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" :
 		"Releasing", dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl,
-		cmd->orig_fe_lun, cmd->t_task->t_task_cdb[0], *asc, *ascq);
+		cmd->orig_fe_lun, cmd->t_task.t_task_cdb[0], *asc, *ascq);
 }
 
 int core_scsi3_ua_clear_for_request_sense(

drivers/target/tcm_fc/tfc_cmd.c

@@ -72,12 +72,12 @@ void ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
 		caller, cmd, cmd->cdb);
 	printk(KERN_INFO "%s: cmd %p lun %d\n", caller, cmd, cmd->lun);
 
-	task = se_cmd->t_task;
+	task = &se_cmd->t_task;
 	printk(KERN_INFO "%s: cmd %p task %p se_num %u buf %p len %u se_cmd_flags <0x%x>\n",
 	       caller, cmd, task, task->t_tasks_se_num,
 	       task->t_task_buf, se_cmd->data_length, se_cmd->se_cmd_flags);
-	if (task->t_mem_list)
-		list_for_each_entry(mem, task->t_mem_list, se_list)
+
+	list_for_each_entry(mem, &task->t_mem_list, se_list)
 		printk(KERN_INFO "%s: cmd %p mem %p page %p "
 		       "len 0x%x off 0x%x\n",
 		       caller, cmd, mem,
@@ -262,9 +262,9 @@ int ft_write_pending(struct se_cmd *se_cmd)
 				 * TCM/LIO target
 				 */
 				transport_do_task_sg_chain(se_cmd);
-				cmd->sg = se_cmd->t_task->t_tasks_sg_chained;
+				cmd->sg = se_cmd->t_task.t_tasks_sg_chained;
 				cmd->sg_cnt =
-					se_cmd->t_task->t_tasks_sg_chained_no;
+					se_cmd->t_task.t_tasks_sg_chained_no;
 			}
 			if (cmd->sg && lport->tt.ddp_setup(lport, ep->xid,
 						    cmd->sg, cmd->sg_cnt))
@@ -438,7 +438,7 @@ static void ft_send_tm(struct ft_cmd *cmd)
 	switch (fcp->fc_tm_flags) {
 	case FCP_TMF_LUN_RESET:
 		cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun);
-		if (transport_get_lun_for_tmr(&cmd->se_cmd, cmd->lun) < 0) {
+		if (transport_lookup_tmr_lun(&cmd->se_cmd, cmd->lun) < 0) {
 			/*
 			 * Make sure to clean up newly allocated TMR request
 			 * since "unable to  handle TMR request because failed
@@ -637,7 +637,7 @@ static void ft_send_cmd(struct ft_cmd *cmd)
 	fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd);
 
 	cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun);
-	ret = transport_get_lun_for_cmd(&cmd->se_cmd, cmd->lun);
+	ret = transport_lookup_cmd_lun(&cmd->se_cmd, cmd->lun);
 	if (ret < 0) {
 		ft_dump_cmd(cmd, __func__);
 		transport_send_check_condition_and_sense(&cmd->se_cmd,
@@ -650,13 +650,13 @@ static void ft_send_cmd(struct ft_cmd *cmd)
 	FT_IO_DBG("r_ctl %x alloc task ret %d\n", fh->fh_r_ctl, ret);
 	ft_dump_cmd(cmd, __func__);
 
-	if (ret == -1) {
+	if (ret == -ENOMEM) {
 		transport_send_check_condition_and_sense(se_cmd,
 				TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
 		transport_generic_free_cmd(se_cmd, 0, 1, 0);
 		return;
 	}
-	if (ret == -2) {
+	if (ret == -EINVAL) {
 		if (se_cmd->se_cmd_flags & SCF_SCSI_RESERVATION_CONFLICT)
 			ft_queue_status(se_cmd);
 		else

drivers/target/tcm_fc/tfc_conf.c

@@ -331,7 +331,7 @@ static struct se_portal_group *ft_add_tpg(
 	transport_init_queue_obj(&tpg->qobj);
 
 	ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg,
-				(void *)tpg, TRANSPORT_TPG_TYPE_NORMAL);
+				tpg, TRANSPORT_TPG_TYPE_NORMAL);
 	if (ret < 0) {
 		kfree(tpg);
 		return NULL;

drivers/target/tcm_fc/tfc_io.c

@@ -90,15 +90,14 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
 	lport = ep->lp;
 	cmd->seq = lport->tt.seq_start_next(cmd->seq);
 
-	task = se_cmd->t_task;
-	BUG_ON(!task);
+	task = &se_cmd->t_task;
 	remaining = se_cmd->data_length;
 
 	/*
 	 * Setup to use first mem list entry if any.
 	 */
 	if (task->t_tasks_se_num) {
-		mem = list_first_entry(task->t_mem_list,
+		mem = list_first_entry(&task->t_mem_list,
 			 struct se_mem, se_list);
 		mem_len = mem->se_len;
 		mem_off = mem->se_off;
@@ -236,8 +235,7 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
 	u32 f_ctl;
 	void *buf;
 
-	task = se_cmd->t_task;
-	BUG_ON(!task);
+	task = &se_cmd->t_task;
 
 	fh = fc_frame_header_get(fp);
 	if (!(ntoh24(fh->fh_f_ctl) & FC_FC_REL_OFF))
@@ -315,7 +313,7 @@ void ft_recv_write_data(struct ft_cmd *cmd, struct fc_frame *fp)
 	 * Setup to use first mem list entry if any.
 	 */
 	if (task->t_tasks_se_num) {
-		mem = list_first_entry(task->t_mem_list,
+		mem = list_first_entry(&task->t_mem_list,
 				       struct se_mem, se_list);
 		mem_len = mem->se_len;
 		mem_off = mem->se_off;

include/target/target_core_base.h

@@ -123,7 +123,7 @@ enum se_cmd_flags_table {
 	SCF_SENT_DELAYED_TAS		= 0x00020000,
 	SCF_ALUA_NON_OPTIMIZED		= 0x00040000,
 	SCF_DELAYED_CMD_FROM_SAM_ATTR	= 0x00080000,
-	SCF_PASSTHROUGH_SG_TO_MEM	= 0x00100000,
+	SCF_UNUSED			= 0x00100000,
 	SCF_PASSTHROUGH_CONTIG_TO_SG	= 0x00200000,
 	SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
 	SCF_EMULATE_SYNC_CACHE		= 0x00800000,
@@ -452,9 +452,9 @@ struct se_transport_task {
 	 * and other HW target mode fabric modules.
 	 */
 	struct scatterlist	*t_task_pt_sgl;
-	struct list_head	*t_mem_list;
+	struct list_head	t_mem_list;
 	/* Used for BIDI READ */
-	struct list_head	*t_mem_bidi_list;
+	struct list_head	t_mem_bidi_list;
 	struct list_head	t_task_list;
 } ____cacheline_aligned;
 
@@ -523,9 +523,9 @@ struct se_cmd {
 	atomic_t                transport_sent;
 	/* Used for sense data */
 	void			*sense_buffer;
-	struct list_head	se_delayed_list;
-	struct list_head	se_ordered_list;
-	struct list_head	se_lun_list;
+	struct list_head	se_delayed_node;
+	struct list_head	se_ordered_node;
+	struct list_head	se_lun_node;
 	struct se_device      *se_dev;
 	struct se_dev_entry   *se_deve;
 	struct se_device	*se_obj_ptr;
@@ -534,9 +534,8 @@ struct se_cmd {
 	/* Only used for internal passthrough and legacy TCM fabric modules */
 	struct se_session	*se_sess;
 	struct se_tmr_req	*se_tmr_req;
-	/* t_task is setup to t_task_backstore in transport_init_se_cmd() */
-	struct se_transport_task *t_task;
-	struct se_transport_task t_task_backstore;
+	struct se_transport_task t_task;
+	struct list_head	se_queue_node;
 	struct target_core_fabric_ops *se_tfo;
 	int (*transport_emulate_cdb)(struct se_cmd *);
 	void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);

include/target/target_core_device.h

 #ifndef TARGET_CORE_DEVICE_H
 #define TARGET_CORE_DEVICE_H
 
-extern int transport_get_lun_for_cmd(struct se_cmd *, u32);
-extern int transport_get_lun_for_tmr(struct se_cmd *, u32);
+extern int transport_lookup_cmd_lun(struct se_cmd *, u32);
+extern int transport_lookup_tmr_lun(struct se_cmd *, u32);
 extern struct se_dev_entry *core_get_se_deve_from_rtpi(
 					struct se_node_acl *, u16);
 extern int core_free_device_list_for_node(struct se_node_acl *,

include/target/target_core_transport.h

@@ -159,7 +159,6 @@ extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
 					struct se_subsystem_dev *, u32,
 					void *, struct se_dev_limits *,
 					const char *, const char *);
-extern void transport_device_setup_cmd(struct se_cmd *);
 extern void transport_init_se_cmd(struct se_cmd *,
 					struct target_core_fabric_ops *,
 					struct se_session *, u32, int, int,