Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/nab/scsi-post-merge-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/scsi-post-merge-2.6:
  tcm_fc: Fix conversion spec warning
  tcm_fc: Fix possible lock to unlock type deadlock
  tcm_fc: Fix ft_send_tm LUN lookup OOPs
  target: Fix incorrect strlen() NULL terminator checks
  target: Drop bogus ERR_PTR usage in target_fabric_configfs_init
  target: Fix ERR_PTR dereferencing bugs
  target: Convert transport_deregister_session_configfs nacl_sess_lock to save irq state
  target: Fix transport_get_lun_for_tmr failure cases
  [SCSI] target: Convert TASK_ATTR to scsi_tcq.h definitions
  [SCSI] target: Convert REPORT_LUNs to use int_to_scsilun
  [SCSI] target: Fix task->task_execute_queue=1 clear bug + LUN_RESET OOPs
  [SCSI] target: Fix bug with task_sg chained transport_free_dev_tasks release
  [SCSI] target: Fix interrupt context bug with stats_lock and core_tmr_alloc_req
  [SCSI] target: Fix multi task->task_sg[] chaining logic bug

drivers/target/loopback/tcm_loop.c

@@ -386,7 +386,7 @@ static int tcm_loop_device_reset(struct scsi_cmnd *sc)
 	 */
 	se_cmd->se_tmr_req = core_tmr_alloc_req(se_cmd, (void *)tl_tmr,
 				TMR_LUN_RESET);
-	if (!se_cmd->se_tmr_req)
+	if (IS_ERR(se_cmd->se_tmr_req))
 		goto release;
 	/*
 	 * Locate the underlying TCM struct se_lun from sc->device->lun
@@ -1017,6 +1017,7 @@ static int tcm_loop_make_nexus(
 	struct se_portal_group *se_tpg;
 	struct tcm_loop_hba *tl_hba = tl_tpg->tl_hba;
 	struct tcm_loop_nexus *tl_nexus;
+	int ret = -ENOMEM;
 
 	if (tl_tpg->tl_hba->tl_nexus) {
 		printk(KERN_INFO "tl_tpg->tl_hba->tl_nexus already exists\n");
@@ -1033,8 +1034,10 @@ static int tcm_loop_make_nexus(
 	 * Initialize the struct se_session pointer
 	 */
 	tl_nexus->se_sess = transport_init_session();
-	if (!tl_nexus->se_sess)
+	if (IS_ERR(tl_nexus->se_sess)) {
+		ret = PTR_ERR(tl_nexus->se_sess);
 		goto out;
+	}
 	/*
 	 * Since we are running in 'demo mode' this call with generate a
 	 * struct se_node_acl for the tcm_loop struct se_portal_group with the SCSI
@@ -1060,7 +1063,7 @@ static int tcm_loop_make_nexus(
 
 out:
 	kfree(tl_nexus);
-	return -ENOMEM;
+	return ret;
 }
 
 static int tcm_loop_drop_nexus(
@@ -1140,7 +1143,7 @@ static ssize_t tcm_loop_tpg_store_nexus(
 	 * the fabric protocol_id set in tcm_loop_make_scsi_hba(), and call
 	 * tcm_loop_make_nexus()
 	 */
-	if (strlen(page) > TL_WWN_ADDR_LEN) {
+	if (strlen(page) >= TL_WWN_ADDR_LEN) {
 		printk(KERN_ERR "Emulated NAA Sas Address: %s, exceeds"
 				" max: %d\n", page, TL_WWN_ADDR_LEN);
 		return -EINVAL;
@@ -1321,7 +1324,7 @@ struct se_wwn *tcm_loop_make_scsi_hba(
 	return ERR_PTR(-EINVAL);
 
 check_len:
-	if (strlen(name) > TL_WWN_ADDR_LEN) {
+	if (strlen(name) >= TL_WWN_ADDR_LEN) {
 		printk(KERN_ERR "Emulated NAA %s Address: %s, exceeds"
 			" max: %d\n", name, tcm_loop_dump_proto_id(tl_hba),
 			TL_WWN_ADDR_LEN);

drivers/target/target_core_configfs.c

@@ -304,15 +304,15 @@ struct target_fabric_configfs *target_fabric_configfs_init(
 		printk(KERN_ERR "Unable to locate passed fabric name\n");
 		return NULL;
 	}
-	if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
+	if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
 		printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
 			"_NAME_SIZE\n", name);
 		return NULL;
 	}
 
 	tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 	if (!(tf))
-		return ERR_PTR(-ENOMEM);
+		return NULL;
 
 	INIT_LIST_HEAD(&tf->tf_list);
 	atomic_set(&tf->tf_access_cnt, 0);
@@ -851,7 +851,7 @@ static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
 		return -EOPNOTSUPP;
 	}
 
-	if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
+	if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
 		printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
 		" INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
 		return -EOVERFLOW;
@@ -917,7 +917,7 @@ static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
 
 		transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
 
-		if ((len + strlen(buf) > PAGE_SIZE))
+		if ((len + strlen(buf) >= PAGE_SIZE))
 			break;
 
 		len += sprintf(page+len, "%s", buf);
@@ -962,19 +962,19 @@ static ssize_t target_core_dev_wwn_show_attr_##_name(			\
 									\
 		memset(buf, 0, VPD_TMP_BUF_SIZE);			\
 		transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);	\
-		if ((len + strlen(buf) > PAGE_SIZE))			\
+		if ((len + strlen(buf) >= PAGE_SIZE))			\
 			break;						\
 		len += sprintf(page+len, "%s", buf);			\
 									\
 		memset(buf, 0, VPD_TMP_BUF_SIZE);			\
 		transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
-		if ((len + strlen(buf) > PAGE_SIZE))			\
+		if ((len + strlen(buf) >= PAGE_SIZE))			\
 			break;						\
 		len += sprintf(page+len, "%s", buf);			\
 									\
 		memset(buf, 0, VPD_TMP_BUF_SIZE);			\
 		transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
-		if ((len + strlen(buf) > PAGE_SIZE))			\
+		if ((len + strlen(buf) >= PAGE_SIZE))			\
 			break;						\
 		len += sprintf(page+len, "%s", buf);			\
 	}								\
@@ -1299,7 +1299,7 @@ static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
 			&i_buf[0] : "", pr_reg->pr_res_key,
 			pr_reg->pr_res_generation);
 
-		if ((len + strlen(buf) > PAGE_SIZE))
+		if ((len + strlen(buf) >= PAGE_SIZE))
 			break;
 
 		len += sprintf(page+len, "%s", buf);
@@ -1496,7 +1496,7 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
 				ret = -ENOMEM;
 				goto out;
 			}
-			if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
+			if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
 				printk(KERN_ERR "APTPL metadata initiator_node="
 					" exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
 					PR_APTPL_MAX_IPORT_LEN);
@@ -1510,7 +1510,7 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
 				ret = -ENOMEM;
 				goto out;
 			}
-			if (strlen(isid) > PR_REG_ISID_LEN) {
+			if (strlen(isid) >= PR_REG_ISID_LEN) {
 				printk(KERN_ERR "APTPL metadata initiator_isid"
 					"= exceeds PR_REG_ISID_LEN: %d\n",
 					PR_REG_ISID_LEN);
@@ -1571,7 +1571,7 @@ static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
 				ret = -ENOMEM;
 				goto out;
 			}
-			if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
+			if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
 				printk(KERN_ERR "APTPL metadata target_node="
 					" exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
 					PR_APTPL_MAX_TPORT_LEN);
@@ -3052,7 +3052,7 @@ static struct config_group *target_core_call_addhbatotarget(
 	int ret;
 
 	memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
-	if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
+	if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
 		printk(KERN_ERR "Passed *name strlen(): %d exceeds"
 			" TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
 			TARGET_CORE_NAME_MAX_LEN);

drivers/target/target_core_device.c

@@ -192,7 +192,7 @@ int transport_get_lun_for_tmr(
 			&SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
 	if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
 		se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
-		dev = se_tmr->tmr_dev = se_lun->lun_se_dev;
+		dev = se_lun->lun_se_dev;
 		se_cmd->pr_res_key = deve->pr_res_key;
 		se_cmd->orig_fe_lun = unpacked_lun;
 		se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
@@ -216,6 +216,7 @@ int transport_get_lun_for_tmr(
 		se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
 		return -1;
 	}
+	se_tmr->tmr_dev = dev;
 
 	spin_lock(&dev->se_tmr_lock);
 	list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
@@ -1430,7 +1431,7 @@ struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
 	struct se_lun_acl *lacl;
 	struct se_node_acl *nacl;
 
-	if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
+	if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
 		printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
 			TPG_TFO(tpg)->get_fabric_name());
 		*ret = -EOVERFLOW;

drivers/target/target_core_pr.c

@@ -1916,7 +1916,7 @@ static int __core_scsi3_update_aptpl_buf(
 				pr_reg->pr_res_mapped_lun);
 		}
 
-		if ((len + strlen(tmp) > pr_aptpl_buf_len)) {
+		if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
 			printk(KERN_ERR "Unable to update renaming"
 				" APTPL metadata\n");
 			spin_unlock(&T10_RES(su_dev)->registration_lock);
@@ -1934,7 +1934,7 @@ static int __core_scsi3_update_aptpl_buf(
 			TPG_TFO(tpg)->tpg_get_tag(tpg),
 			lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count);
 
-		if ((len + strlen(tmp) > pr_aptpl_buf_len)) {
+		if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
 			printk(KERN_ERR "Unable to update renaming"
 				" APTPL metadata\n");
 			spin_unlock(&T10_RES(su_dev)->registration_lock);
@@ -1986,7 +1986,7 @@ static int __core_scsi3_write_aptpl_to_file(
 	memset(iov, 0, sizeof(struct iovec));
 	memset(path, 0, 512);
 
-	if (strlen(&wwn->unit_serial[0]) > 512) {
+	if (strlen(&wwn->unit_serial[0]) >= 512) {
 		printk(KERN_ERR "WWN value for struct se_device does not fit"
 			" into path buffer\n");
 		return -1;

drivers/target/target_core_tmr.c

@@ -75,10 +75,16 @@ void core_tmr_release_req(
 {
 	struct se_device *dev = tmr->tmr_dev;
 
+	if (!dev) {
+		kmem_cache_free(se_tmr_req_cache, tmr);
+		return;
+	}
+
 	spin_lock(&dev->se_tmr_lock);
 	list_del(&tmr->tmr_list);
-	kmem_cache_free(se_tmr_req_cache, tmr);
 	spin_unlock(&dev->se_tmr_lock);
+
+	kmem_cache_free(se_tmr_req_cache, tmr);
 }
 
 static void core_tmr_handle_tas_abort(

drivers/target/target_core_transport.c

@@ -536,13 +536,13 @@ EXPORT_SYMBOL(transport_register_session);
 void transport_deregister_session_configfs(struct se_session *se_sess)
 {
 	struct se_node_acl *se_nacl;
-
+	unsigned long flags;
 	/*
 	 * Used by struct se_node_acl's under ConfigFS to locate active struct se_session
 	 */
 	se_nacl = se_sess->se_node_acl;
 	if ((se_nacl)) {
-		spin_lock_irq(&se_nacl->nacl_sess_lock);
+		spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags);
 		list_del(&se_sess->sess_acl_list);
 		/*
 		 * If the session list is empty, then clear the pointer.
@@ -556,7 +556,7 @@ void transport_deregister_session_configfs(struct se_session *se_sess)
 					se_nacl->acl_sess_list.prev,
 					struct se_session, sess_acl_list);
 		}
-		spin_unlock_irq(&se_nacl->nacl_sess_lock);
+		spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags);
 	}
 }
 EXPORT_SYMBOL(transport_deregister_session_configfs);

drivers/target/tcm_fc/tcm_fc.h

@@ -144,7 +144,7 @@ enum ft_cmd_state {
  */
 struct ft_cmd {
 	enum ft_cmd_state state;
-	u16 lun;			/* LUN from request */
+	u32 lun;                        /* LUN from request */
 	struct ft_sess *sess;		/* session held for cmd */
 	struct fc_seq *seq;		/* sequence in exchange mgr */
 	struct se_cmd se_cmd;		/* Local TCM I/O descriptor */

drivers/target/tcm_fc/tfc_cmd.c

@@ -94,29 +94,6 @@ void ft_dump_cmd(struct ft_cmd *cmd, const char *caller)
 		16, 4, cmd->cdb, MAX_COMMAND_SIZE, 0);
 }
 
-/*
- * Get LUN from CDB.
- */
-static int ft_get_lun_for_cmd(struct ft_cmd *cmd, u8 *lunp)
-{
-	u64 lun;
-
-	lun = lunp[1];
-	switch (lunp[0] >> 6) {
-	case 0:
-		break;
-	case 1:
-		lun |= (lunp[0] & 0x3f) << 8;
-		break;
-	default:
-		return -1;
-	}
-	if (lun >= TRANSPORT_MAX_LUNS_PER_TPG)
-		return -1;
-	cmd->lun = lun;
-	return transport_get_lun_for_cmd(&cmd->se_cmd, NULL, lun);
-}
-
 static void ft_queue_cmd(struct ft_sess *sess, struct ft_cmd *cmd)
 {
 	struct se_queue_obj *qobj;
@@ -418,20 +395,14 @@ static void ft_send_tm(struct ft_cmd *cmd)
 {
 	struct se_tmr_req *tmr;
 	struct fcp_cmnd *fcp;
+	struct ft_sess *sess;
 	u8 tm_func;
 
 	fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp));
 
 	switch (fcp->fc_tm_flags) {
 	case FCP_TMF_LUN_RESET:
 		tm_func = TMR_LUN_RESET;
-		if (ft_get_lun_for_cmd(cmd, fcp->fc_lun) < 0) {
-			ft_dump_cmd(cmd, __func__);
-			transport_send_check_condition_and_sense(&cmd->se_cmd,
-				cmd->se_cmd.scsi_sense_reason, 0);
-			ft_sess_put(cmd->sess);
-			return;
-		}
 		break;
 	case FCP_TMF_TGT_RESET:
 		tm_func = TMR_TARGET_WARM_RESET;
@@ -463,6 +434,36 @@ static void ft_send_tm(struct ft_cmd *cmd)
 		return;
 	}
 	cmd->se_cmd.se_tmr_req = tmr;
+
+	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) {
+			/*
+			 * Make sure to clean up newly allocated TMR request
+			 * since "unable to  handle TMR request because failed
+			 * to get to LUN"
+			 */
+			FT_TM_DBG("Failed to get LUN for TMR func %d, "
+				  "se_cmd %p, unpacked_lun %d\n",
+				  tm_func, &cmd->se_cmd, cmd->lun);
+			ft_dump_cmd(cmd, __func__);
+			sess = cmd->sess;
+			transport_send_check_condition_and_sense(&cmd->se_cmd,
+				cmd->se_cmd.scsi_sense_reason, 0);
+			transport_generic_free_cmd(&cmd->se_cmd, 0, 1, 0);
+			ft_sess_put(sess);
+			return;
+		}
+		break;
+	case FCP_TMF_TGT_RESET:
+	case FCP_TMF_CLR_TASK_SET:
+	case FCP_TMF_ABT_TASK_SET:
+	case FCP_TMF_CLR_ACA:
+		break;
+	default:
+		return;
+	}
 	transport_generic_handle_tmr(&cmd->se_cmd);
 }
 
@@ -635,7 +636,8 @@ 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);
 
-	ret = ft_get_lun_for_cmd(cmd, fcp->fc_lun);
+	cmd->lun = scsilun_to_int((struct scsi_lun *)fcp->fc_lun);
+	ret = transport_get_lun_for_cmd(&cmd->se_cmd, NULL, cmd->lun);
 	if (ret < 0) {
 		ft_dump_cmd(cmd, __func__);
 		transport_send_check_condition_and_sense(&cmd->se_cmd,

drivers/target/tcm_fc/tfc_io.c

@@ -203,7 +203,7 @@ int ft_queue_data_in(struct se_cmd *se_cmd)
 			/* XXX For now, initiator will retry */
 			if (printk_ratelimit())
 				printk(KERN_ERR "%s: Failed to send frame %p, "
-						"xid <0x%x>, remaining <0x%x>, "
+						"xid <0x%x>, remaining %zu, "
 						"lso_max <0x%x>\n",
 						__func__, fp, ep->xid,
 						remaining, lport->lso_max);

drivers/target/tcm_fc/tfc_sess.c

@@ -229,7 +229,7 @@ static struct ft_sess *ft_sess_create(struct ft_tport *tport, u32 port_id,
 		return NULL;
 
 	sess->se_sess = transport_init_session();
-	if (!sess->se_sess) {
+	if (IS_ERR(sess->se_sess)) {
 		kfree(sess);
 		return NULL;
 	}
@@ -332,7 +332,7 @@ void ft_sess_close(struct se_session *se_sess)
 	lport = sess->tport->lport;
 	port_id = sess->port_id;
 	if (port_id == -1) {
-		mutex_lock(&ft_lport_lock);
+		mutex_unlock(&ft_lport_lock);
 		return;
 	}
 	FT_SESS_DBG("port_id %x\n", port_id);