Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3868 insertions, 0 deletions

diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
new file mode 100644
index 000000000..381668fa1
--- /dev/null
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -0,0 +1,3868 @@
+/*
+ *  FiberChannel transport specific attributes exported to sysfs.
+ *
+ *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  ========
+ *
+ *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
+ *    Rewrite for host, target, device, and remote port attributes,
+ *    statistics, and service functions...
+ *    Add vports, etc
+ *
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/bsg-lib.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_cmnd.h>
+#include <net/netlink.h>
+#include <scsi/scsi_netlink_fc.h>
+#include <scsi/scsi_bsg_fc.h>
+#include "scsi_priv.h"
+
+static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
+static void fc_vport_sched_delete(struct work_struct *work);
+static int fc_vport_setup(struct Scsi_Host *shost, int channel,
+	struct device *pdev, struct fc_vport_identifiers  *ids,
+	struct fc_vport **vport);
+static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
+static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
+static void fc_bsg_remove(struct request_queue *);
+static void fc_bsg_goose_queue(struct fc_rport *);
+
+/*
+ * Module Parameters
+ */
+
+/*
+ * dev_loss_tmo: the default number of seconds that the FC transport
+ *   should insulate the loss of a remote port.
+ *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
+ */
+static unsigned int fc_dev_loss_tmo = 60;		/* seconds */
+
+module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(dev_loss_tmo,
+		 "Maximum number of seconds that the FC transport should"
+		 " insulate the loss of a remote port. Once this value is"
+		 " exceeded, the scsi target is removed. Value should be"
+		 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
+		 " fast_io_fail_tmo is not set.");
+
+/*
+ * Redefine so that we can have same named attributes in the
+ * sdev/starget/host objects.
+ */
+#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)		\
+struct device_attribute device_attr_##_prefix##_##_name = 	\
+	__ATTR(_name,_mode,_show,_store)
+
+#define fc_enum_name_search(title, table_type, table)			\
+static const char *get_fc_##title##_name(enum table_type table_key)	\
+{									\
+	int i;								\
+	char *name = NULL;						\
+									\
+	for (i = 0; i < ARRAY_SIZE(table); i++) {			\
+		if (table[i].value == table_key) {			\
+			name = table[i].name;				\
+			break;						\
+		}							\
+	}								\
+	return name;							\
+}
+
+#define fc_enum_name_match(title, table_type, table)			\
+static int get_fc_##title##_match(const char *table_key,		\
+		enum table_type *value)					\
+{									\
+	int i;								\
+									\
+	for (i = 0; i < ARRAY_SIZE(table); i++) {			\
+		if (strncmp(table_key, table[i].name,			\
+				table[i].matchlen) == 0) {		\
+			*value = table[i].value;			\
+			return 0; /* success */				\
+		}							\
+	}								\
+	return 1; /* failure */						\
+}
+
+
+/* Convert fc_port_type values to ascii string name */
+static struct {
+	enum fc_port_type	value;
+	char			*name;
+} fc_port_type_names[] = {
+	{ FC_PORTTYPE_UNKNOWN,		"Unknown" },
+	{ FC_PORTTYPE_OTHER,		"Other" },
+	{ FC_PORTTYPE_NOTPRESENT,	"Not Present" },
+	{ FC_PORTTYPE_NPORT,	"NPort (fabric via point-to-point)" },
+	{ FC_PORTTYPE_NLPORT,	"NLPort (fabric via loop)" },
+	{ FC_PORTTYPE_LPORT,	"LPort (private loop)" },
+	{ FC_PORTTYPE_PTP,	"Point-To-Point (direct nport connection)" },
+	{ FC_PORTTYPE_NPIV,		"NPIV VPORT" },
+};
+fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
+#define FC_PORTTYPE_MAX_NAMELEN		50
+
+/* Reuse fc_port_type enum function for vport_type */
+#define get_fc_vport_type_name get_fc_port_type_name
+
+
+/* Convert fc_host_event_code values to ascii string name */
+static const struct {
+	enum fc_host_event_code		value;
+	char				*name;
+} fc_host_event_code_names[] = {
+	{ FCH_EVT_LIP,			"lip" },
+	{ FCH_EVT_LINKUP,		"link_up" },
+	{ FCH_EVT_LINKDOWN,		"link_down" },
+	{ FCH_EVT_LIPRESET,		"lip_reset" },
+	{ FCH_EVT_RSCN,			"rscn" },
+	{ FCH_EVT_ADAPTER_CHANGE,	"adapter_chg" },
+	{ FCH_EVT_PORT_UNKNOWN,		"port_unknown" },
+	{ FCH_EVT_PORT_ONLINE,		"port_online" },
+	{ FCH_EVT_PORT_OFFLINE,		"port_offline" },
+	{ FCH_EVT_PORT_FABRIC,		"port_fabric" },
+	{ FCH_EVT_LINK_UNKNOWN,		"link_unknown" },
+	{ FCH_EVT_VENDOR_UNIQUE,	"vendor_unique" },
+};
+fc_enum_name_search(host_event_code, fc_host_event_code,
+		fc_host_event_code_names)
+#define FC_HOST_EVENT_CODE_MAX_NAMELEN	30
+
+
+/* Convert fc_port_state values to ascii string name */
+static struct {
+	enum fc_port_state	value;
+	char			*name;
+} fc_port_state_names[] = {
+	{ FC_PORTSTATE_UNKNOWN,		"Unknown" },
+	{ FC_PORTSTATE_NOTPRESENT,	"Not Present" },
+	{ FC_PORTSTATE_ONLINE,		"Online" },
+	{ FC_PORTSTATE_OFFLINE,		"Offline" },
+	{ FC_PORTSTATE_BLOCKED,		"Blocked" },
+	{ FC_PORTSTATE_BYPASSED,	"Bypassed" },
+	{ FC_PORTSTATE_DIAGNOSTICS,	"Diagnostics" },
+	{ FC_PORTSTATE_LINKDOWN,	"Linkdown" },
+	{ FC_PORTSTATE_ERROR,		"Error" },
+	{ FC_PORTSTATE_LOOPBACK,	"Loopback" },
+	{ FC_PORTSTATE_DELETED,		"Deleted" },
+};
+fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
+#define FC_PORTSTATE_MAX_NAMELEN	20
+
+
+/* Convert fc_vport_state values to ascii string name */
+static struct {
+	enum fc_vport_state	value;
+	char			*name;
+} fc_vport_state_names[] = {
+	{ FC_VPORT_UNKNOWN,		"Unknown" },
+	{ FC_VPORT_ACTIVE,		"Active" },
+	{ FC_VPORT_DISABLED,		"Disabled" },
+	{ FC_VPORT_LINKDOWN,		"Linkdown" },
+	{ FC_VPORT_INITIALIZING,	"Initializing" },
+	{ FC_VPORT_NO_FABRIC_SUPP,	"No Fabric Support" },
+	{ FC_VPORT_NO_FABRIC_RSCS,	"No Fabric Resources" },
+	{ FC_VPORT_FABRIC_LOGOUT,	"Fabric Logout" },
+	{ FC_VPORT_FABRIC_REJ_WWN,	"Fabric Rejected WWN" },
+	{ FC_VPORT_FAILED,		"VPort Failed" },
+};
+fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
+#define FC_VPORTSTATE_MAX_NAMELEN	24
+
+/* Reuse fc_vport_state enum function for vport_last_state */
+#define get_fc_vport_last_state_name get_fc_vport_state_name
+
+
+/* Convert fc_tgtid_binding_type values to ascii string name */
+static const struct {
+	enum fc_tgtid_binding_type	value;
+	char				*name;
+	int				matchlen;
+} fc_tgtid_binding_type_names[] = {
+	{ FC_TGTID_BIND_NONE, "none", 4 },
+	{ FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
+	{ FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
+	{ FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
+};
+fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
+		fc_tgtid_binding_type_names)
+fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
+		fc_tgtid_binding_type_names)
+#define FC_BINDTYPE_MAX_NAMELEN	30
+
+
+#define fc_bitfield_name_search(title, table)			\
+static ssize_t							\
+get_fc_##title##_names(u32 table_key, char *buf)		\
+{								\
+	char *prefix = "";					\
+	ssize_t len = 0;					\
+	int i;							\
+								\
+	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
+		if (table[i].value & table_key) {		\
+			len += sprintf(buf + len, "%s%s",	\
+				prefix, table[i].name);		\
+			prefix = ", ";				\
+		}						\
+	}							\
+	len += sprintf(buf + len, "\n");			\
+	return len;						\
+}
+
+
+/* Convert FC_COS bit values to ascii string name */
+static const struct {
+	u32 			value;
+	char			*name;
+} fc_cos_names[] = {
+	{ FC_COS_CLASS1,	"Class 1" },
+	{ FC_COS_CLASS2,	"Class 2" },
+	{ FC_COS_CLASS3,	"Class 3" },
+	{ FC_COS_CLASS4,	"Class 4" },
+	{ FC_COS_CLASS6,	"Class 6" },
+};
+fc_bitfield_name_search(cos, fc_cos_names)
+
+
+/* Convert FC_PORTSPEED bit values to ascii string name */
+static const struct {
+	u32 			value;
+	char			*name;
+} fc_port_speed_names[] = {
+	{ FC_PORTSPEED_1GBIT,		"1 Gbit" },
+	{ FC_PORTSPEED_2GBIT,		"2 Gbit" },
+	{ FC_PORTSPEED_4GBIT,		"4 Gbit" },
+	{ FC_PORTSPEED_10GBIT,		"10 Gbit" },
+	{ FC_PORTSPEED_8GBIT,		"8 Gbit" },
+	{ FC_PORTSPEED_16GBIT,		"16 Gbit" },
+	{ FC_PORTSPEED_32GBIT,		"32 Gbit" },
+	{ FC_PORTSPEED_20GBIT,		"20 Gbit" },
+	{ FC_PORTSPEED_40GBIT,		"40 Gbit" },
+	{ FC_PORTSPEED_50GBIT,		"50 Gbit" },
+	{ FC_PORTSPEED_100GBIT,		"100 Gbit" },
+	{ FC_PORTSPEED_25GBIT,		"25 Gbit" },
+	{ FC_PORTSPEED_64GBIT,		"64 Gbit" },
+	{ FC_PORTSPEED_128GBIT,		"128 Gbit" },
+	{ FC_PORTSPEED_NOT_NEGOTIATED,	"Not Negotiated" },
+};
+fc_bitfield_name_search(port_speed, fc_port_speed_names)
+
+
+static int
+show_fc_fc4s (char *buf, u8 *fc4_list)
+{
+	int i, len=0;
+
+	for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
+		len += sprintf(buf + len , "0x%02x ", *fc4_list);
+	len += sprintf(buf + len, "\n");
+	return len;
+}
+
+
+/* Convert FC_PORT_ROLE bit values to ascii string name */
+static const struct {
+	u32 			value;
+	char			*name;
+} fc_port_role_names[] = {
+	{ FC_PORT_ROLE_FCP_TARGET,		"FCP Target" },
+	{ FC_PORT_ROLE_FCP_INITIATOR,		"FCP Initiator" },
+	{ FC_PORT_ROLE_IP_PORT,			"IP Port" },
+	{ FC_PORT_ROLE_FCP_DUMMY_INITIATOR,	"FCP Dummy Initiator" },
+};
+fc_bitfield_name_search(port_roles, fc_port_role_names)
+
+/*
+ * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
+ */
+#define FC_WELLKNOWN_PORTID_MASK	0xfffff0
+#define FC_WELLKNOWN_ROLE_MASK  	0x00000f
+#define FC_FPORT_PORTID			0x00000e
+#define FC_FABCTLR_PORTID		0x00000d
+#define FC_DIRSRVR_PORTID		0x00000c
+#define FC_TIMESRVR_PORTID		0x00000b
+#define FC_MGMTSRVR_PORTID		0x00000a
+
+
+static void fc_timeout_deleted_rport(struct work_struct *work);
+static void fc_timeout_fail_rport_io(struct work_struct *work);
+static void fc_scsi_scan_rport(struct work_struct *work);
+
+/*
+ * Attribute counts pre object type...
+ * Increase these values if you add attributes
+ */
+#define FC_STARGET_NUM_ATTRS 	3
+#define FC_RPORT_NUM_ATTRS	10
+#define FC_VPORT_NUM_ATTRS	9
+#define FC_HOST_NUM_ATTRS	29
+
+struct fc_internal {
+	struct scsi_transport_template t;
+	struct fc_function_template *f;
+
+	/*
+	 * For attributes : each object has :
+	 *   An array of the actual attributes structures
+	 *   An array of null-terminated pointers to the attribute
+	 *     structures - used for mid-layer interaction.
+	 *
+	 * The attribute containers for the starget and host are are
+	 * part of the midlayer. As the remote port is specific to the
+	 * fc transport, we must provide the attribute container.
+	 */
+	struct device_attribute private_starget_attrs[
+							FC_STARGET_NUM_ATTRS];
+	struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
+
+	struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
+	struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
+
+	struct transport_container rport_attr_cont;
+	struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
+	struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
+
+	struct transport_container vport_attr_cont;
+	struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
+	struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
+};
+
+#define to_fc_internal(tmpl)	container_of(tmpl, struct fc_internal, t)
+
+static int fc_target_setup(struct transport_container *tc, struct device *dev,
+			   struct device *cdev)
+{
+	struct scsi_target *starget = to_scsi_target(dev);
+	struct fc_rport *rport = starget_to_rport(starget);
+
+	/*
+	 * if parent is remote port, use values from remote port.
+	 * Otherwise, this host uses the fc_transport, but not the
+	 * remote port interface. As such, initialize to known non-values.
+	 */
+	if (rport) {
+		fc_starget_node_name(starget) = rport->node_name;
+		fc_starget_port_name(starget) = rport->port_name;
+		fc_starget_port_id(starget) = rport->port_id;
+	} else {
+		fc_starget_node_name(starget) = -1;
+		fc_starget_port_name(starget) = -1;
+		fc_starget_port_id(starget) = -1;
+	}
+
+	return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_transport_class,
+			       "fc_transport",
+			       fc_target_setup,
+			       NULL,
+			       NULL);
+
+static int fc_host_setup(struct transport_container *tc, struct device *dev,
+			 struct device *cdev)
+{
+	struct Scsi_Host *shost = dev_to_shost(dev);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+
+	/*
+	 * Set default values easily detected by the midlayer as
+	 * failure cases.  The scsi lldd is responsible for initializing
+	 * all transport attributes to valid values per host.
+	 */
+	fc_host->node_name = -1;
+	fc_host->port_name = -1;
+	fc_host->permanent_port_name = -1;
+	fc_host->supported_classes = FC_COS_UNSPECIFIED;
+	memset(fc_host->supported_fc4s, 0,
+		sizeof(fc_host->supported_fc4s));
+	fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
+	fc_host->maxframe_size = -1;
+	fc_host->max_npiv_vports = 0;
+	memset(fc_host->serial_number, 0,
+		sizeof(fc_host->serial_number));
+	memset(fc_host->manufacturer, 0,
+		sizeof(fc_host->manufacturer));
+	memset(fc_host->model, 0,
+		sizeof(fc_host->model));
+	memset(fc_host->model_description, 0,
+		sizeof(fc_host->model_description));
+	memset(fc_host->hardware_version, 0,
+		sizeof(fc_host->hardware_version));
+	memset(fc_host->driver_version, 0,
+		sizeof(fc_host->driver_version));
+	memset(fc_host->firmware_version, 0,
+		sizeof(fc_host->firmware_version));
+	memset(fc_host->optionrom_version, 0,
+		sizeof(fc_host->optionrom_version));
+
+	fc_host->port_id = -1;
+	fc_host->port_type = FC_PORTTYPE_UNKNOWN;
+	fc_host->port_state = FC_PORTSTATE_UNKNOWN;
+	memset(fc_host->active_fc4s, 0,
+		sizeof(fc_host->active_fc4s));
+	fc_host->speed = FC_PORTSPEED_UNKNOWN;
+	fc_host->fabric_name = -1;
+	memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
+	memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
+
+	fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;
+
+	INIT_LIST_HEAD(&fc_host->rports);
+	INIT_LIST_HEAD(&fc_host->rport_bindings);
+	INIT_LIST_HEAD(&fc_host->vports);
+	fc_host->next_rport_number = 0;
+	fc_host->next_target_id = 0;
+	fc_host->next_vport_number = 0;
+	fc_host->npiv_vports_inuse = 0;
+
+	snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
+		 "fc_wq_%d", shost->host_no);
+	fc_host->work_q = alloc_workqueue("%s", 0, 0, fc_host->work_q_name);
+	if (!fc_host->work_q)
+		return -ENOMEM;
+
+	fc_host->dev_loss_tmo = fc_dev_loss_tmo;
+	snprintf(fc_host->devloss_work_q_name,
+		 sizeof(fc_host->devloss_work_q_name),
+		 "fc_dl_%d", shost->host_no);
+	fc_host->devloss_work_q = alloc_workqueue("%s", 0, 0,
+					fc_host->devloss_work_q_name);
+	if (!fc_host->devloss_work_q) {
+		destroy_workqueue(fc_host->work_q);
+		fc_host->work_q = NULL;
+		return -ENOMEM;
+	}
+
+	fc_bsg_hostadd(shost, fc_host);
+	/* ignore any bsg add error - we just can't do sgio */
+
+	return 0;
+}
+
+static int fc_host_remove(struct transport_container *tc, struct device *dev,
+			 struct device *cdev)
+{
+	struct Scsi_Host *shost = dev_to_shost(dev);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+
+	fc_bsg_remove(fc_host->rqst_q);
+	return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_host_class,
+			       "fc_host",
+			       fc_host_setup,
+			       fc_host_remove,
+			       NULL);
+
+/*
+ * Setup and Remove actions for remote ports are handled
+ * in the service functions below.
+ */
+static DECLARE_TRANSPORT_CLASS(fc_rport_class,
+			       "fc_remote_ports",
+			       NULL,
+			       NULL,
+			       NULL);
+
+/*
+ * Setup and Remove actions for virtual ports are handled
+ * in the service functions below.
+ */
+static DECLARE_TRANSPORT_CLASS(fc_vport_class,
+			       "fc_vports",
+			       NULL,
+			       NULL,
+			       NULL);
+
+/*
+ * Netlink Infrastructure
+ */
+
+static atomic_t fc_event_seq;
+
+/**
+ * fc_get_event_number - Obtain the next sequential FC event number
+ *
+ * Notes:
+ *   We could have inlined this, but it would have required fc_event_seq to
+ *   be exposed. For now, live with the subroutine call.
+ *   Atomic used to avoid lock/unlock...
+ */
+u32
+fc_get_event_number(void)
+{
+	return atomic_add_return(1, &fc_event_seq);
+}
+EXPORT_SYMBOL(fc_get_event_number);
+
+
+/**
+ * fc_host_post_event - called to post an even on an fc_host.
+ * @shost:		host the event occurred on
+ * @event_number:	fc event number obtained from get_fc_event_number()
+ * @event_code:		fc_host event being posted
+ * @event_data:		32bits of data for the event being posted
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+void
+fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
+		enum fc_host_event_code event_code, u32 event_data)
+{
+	struct sk_buff *skb;
+	struct nlmsghdr	*nlh;
+	struct fc_nl_event *event;
+	const char *name;
+	u32 len;
+	int err;
+
+	if (!scsi_nl_sock) {
+		err = -ENOENT;
+		goto send_fail;
+	}
+
+	len = FC_NL_MSGALIGN(sizeof(*event));
+
+	skb = nlmsg_new(len, GFP_KERNEL);
+	if (!skb) {
+		err = -ENOBUFS;
+		goto send_fail;
+	}
+
+	nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
+	if (!nlh) {
+		err = -ENOBUFS;
+		goto send_fail_skb;
+	}
+	event = nlmsg_data(nlh);
+
+	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
+				FC_NL_ASYNC_EVENT, len);
+	event->seconds = ktime_get_real_seconds();
+	event->vendor_id = 0;
+	event->host_no = shost->host_no;
+	event->event_datalen = sizeof(u32);	/* bytes */
+	event->event_num = event_number;
+	event->event_code = event_code;
+	event->event_data = event_data;
+
+	nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
+			GFP_KERNEL);
+	return;
+
+send_fail_skb:
+	kfree_skb(skb);
+send_fail:
+	name = get_fc_host_event_code_name(event_code);
+	printk(KERN_WARNING
+		"%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
+		__func__, shost->host_no,
+		(name) ? name : "<unknown>", event_data, err);
+	return;
+}
+EXPORT_SYMBOL(fc_host_post_event);
+
+
+/**
+ * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
+ * @shost:		host the event occurred on
+ * @event_number:	fc event number obtained from get_fc_event_number()
+ * @data_len:		amount, in bytes, of vendor unique data
+ * @data_buf:		pointer to vendor unique data
+ * @vendor_id:          Vendor id
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+void
+fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
+		u32 data_len, char * data_buf, u64 vendor_id)
+{
+	struct sk_buff *skb;
+	struct nlmsghdr	*nlh;
+	struct fc_nl_event *event;
+	u32 len;
+	int err;
+
+	if (!scsi_nl_sock) {
+		err = -ENOENT;
+		goto send_vendor_fail;
+	}
+
+	len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
+
+	skb = nlmsg_new(len, GFP_KERNEL);
+	if (!skb) {
+		err = -ENOBUFS;
+		goto send_vendor_fail;
+	}
+
+	nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, len, 0);
+	if (!nlh) {
+		err = -ENOBUFS;
+		goto send_vendor_fail_skb;
+	}
+	event = nlmsg_data(nlh);
+
+	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
+				FC_NL_ASYNC_EVENT, len);
+	event->seconds = ktime_get_real_seconds();
+	event->vendor_id = vendor_id;
+	event->host_no = shost->host_no;
+	event->event_datalen = data_len;	/* bytes */
+	event->event_num = event_number;
+	event->event_code = FCH_EVT_VENDOR_UNIQUE;
+	memcpy(&event->event_data, data_buf, data_len);
+
+	nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
+			GFP_KERNEL);
+	return;
+
+send_vendor_fail_skb:
+	kfree_skb(skb);
+send_vendor_fail:
+	printk(KERN_WARNING
+		"%s: Dropped Event : host %d vendor_unique - err %d\n",
+		__func__, shost->host_no, err);
+	return;
+}
+EXPORT_SYMBOL(fc_host_post_vendor_event);
+
+
+
+static __init int fc_transport_init(void)
+{
+	int error;
+
+	atomic_set(&fc_event_seq, 0);
+
+	error = transport_class_register(&fc_host_class);
+	if (error)
+		return error;
+	error = transport_class_register(&fc_vport_class);
+	if (error)
+		goto unreg_host_class;
+	error = transport_class_register(&fc_rport_class);
+	if (error)
+		goto unreg_vport_class;
+	error = transport_class_register(&fc_transport_class);
+	if (error)
+		goto unreg_rport_class;
+	return 0;
+
+unreg_rport_class:
+	transport_class_unregister(&fc_rport_class);
+unreg_vport_class:
+	transport_class_unregister(&fc_vport_class);
+unreg_host_class:
+	transport_class_unregister(&fc_host_class);
+	return error;
+}
+
+static void __exit fc_transport_exit(void)
+{
+	transport_class_unregister(&fc_transport_class);
+	transport_class_unregister(&fc_rport_class);
+	transport_class_unregister(&fc_host_class);
+	transport_class_unregister(&fc_vport_class);
+}
+
+/*
+ * FC Remote Port Attribute Management
+ */
+
+#define fc_rport_show_function(field, format_string, sz, cast)		\
+static ssize_t								\
+show_fc_rport_##field (struct device *dev, 				\
+		       struct device_attribute *attr, char *buf)	\
+{									\
+	struct fc_rport *rport = transport_class_to_rport(dev);		\
+	struct Scsi_Host *shost = rport_to_shost(rport);		\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	if ((i->f->get_rport_##field) &&				\
+	    !((rport->port_state == FC_PORTSTATE_BLOCKED) ||		\
+	      (rport->port_state == FC_PORTSTATE_DELETED) ||		\
+	      (rport->port_state == FC_PORTSTATE_NOTPRESENT)))		\
+		i->f->get_rport_##field(rport);				\
+	return snprintf(buf, sz, format_string, cast rport->field); 	\
+}
+
+#define fc_rport_store_function(field)					\
+static ssize_t								\
+store_fc_rport_##field(struct device *dev,				\
+		       struct device_attribute *attr,			\
+		       const char *buf,	size_t count)			\
+{									\
+	int val;							\
+	struct fc_rport *rport = transport_class_to_rport(dev);		\
+	struct Scsi_Host *shost = rport_to_shost(rport);		\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	char *cp;							\
+	if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||		\
+	    (rport->port_state == FC_PORTSTATE_DELETED) ||		\
+	    (rport->port_state == FC_PORTSTATE_NOTPRESENT))		\
+		return -EBUSY;						\
+	val = simple_strtoul(buf, &cp, 0);				\
+	if (*cp && (*cp != '\n'))					\
+		return -EINVAL;						\
+	i->f->set_rport_##field(rport, val);				\
+	return count;							\
+}
+
+#define fc_rport_rd_attr(field, format_string, sz)			\
+	fc_rport_show_function(field, format_string, sz, )		\
+static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
+			 show_fc_rport_##field, NULL)
+
+#define fc_rport_rd_attr_cast(field, format_string, sz, cast)		\
+	fc_rport_show_function(field, format_string, sz, (cast))	\
+static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
+			  show_fc_rport_##field, NULL)
+
+#define fc_rport_rw_attr(field, format_string, sz)			\
+	fc_rport_show_function(field, format_string, sz, )		\
+	fc_rport_store_function(field)					\
+static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,		\
+			show_fc_rport_##field,				\
+			store_fc_rport_##field)
+
+
+#define fc_private_rport_show_function(field, format_string, sz, cast)	\
+static ssize_t								\
+show_fc_rport_##field (struct device *dev, 				\
+		       struct device_attribute *attr, char *buf)	\
+{									\
+	struct fc_rport *rport = transport_class_to_rport(dev);		\
+	return snprintf(buf, sz, format_string, cast rport->field); 	\
+}
+
+#define fc_private_rport_rd_attr(field, format_string, sz)		\
+	fc_private_rport_show_function(field, format_string, sz, )	\
+static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
+			 show_fc_rport_##field, NULL)
+
+#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)	\
+	fc_private_rport_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
+			  show_fc_rport_##field, NULL)
+
+
+#define fc_private_rport_rd_enum_attr(title, maxlen)			\
+static ssize_t								\
+show_fc_rport_##title (struct device *dev,				\
+		       struct device_attribute *attr, char *buf)	\
+{									\
+	struct fc_rport *rport = transport_class_to_rport(dev);		\
+	const char *name;						\
+	name = get_fc_##title##_name(rport->title);			\
+	if (!name)							\
+		return -EINVAL;						\
+	return snprintf(buf, maxlen, "%s\n", name);			\
+}									\
+static FC_DEVICE_ATTR(rport, title, S_IRUGO,			\
+			show_fc_rport_##title, NULL)
+
+
+#define SETUP_RPORT_ATTRIBUTE_RD(field)					\
+	i->private_rport_attrs[count] = device_attr_rport_##field; \
+	i->private_rport_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_rport_attrs[count].store = NULL;			\
+	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
+	if (i->f->show_rport_##field)					\
+		count++
+
+#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)				\
+	i->private_rport_attrs[count] = device_attr_rport_##field; \
+	i->private_rport_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_rport_attrs[count].store = NULL;			\
+	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
+	count++
+
+#define SETUP_RPORT_ATTRIBUTE_RW(field)					\
+	i->private_rport_attrs[count] = device_attr_rport_##field; \
+	if (!i->f->set_rport_##field) {					\
+		i->private_rport_attrs[count].attr.mode = S_IRUGO;	\
+		i->private_rport_attrs[count].store = NULL;		\
+	}								\
+	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
+	if (i->f->show_rport_##field)					\
+		count++
+
+#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)				\
+{									\
+	i->private_rport_attrs[count] = device_attr_rport_##field; \
+	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
+	count++;							\
+}
+
+
+/* The FC Transport Remote Port Attributes: */
+
+/* Fixed Remote Port Attributes */
+
+fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);
+
+static ssize_t
+show_fc_rport_supported_classes (struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct fc_rport *rport = transport_class_to_rport(dev);
+	if (rport->supported_classes == FC_COS_UNSPECIFIED)
+		return snprintf(buf, 20, "unspecified\n");
+	return get_fc_cos_names(rport->supported_classes, buf);
+}
+static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
+		show_fc_rport_supported_classes, NULL);
+
+/* Dynamic Remote Port Attributes */
+
+/*
+ * dev_loss_tmo attribute
+ */
+static int fc_str_to_dev_loss(const char *buf, unsigned long *val)
+{
+	char *cp;
+
+	*val = simple_strtoul(buf, &cp, 0);
+	if (*cp && (*cp != '\n'))
+		return -EINVAL;
+	/*
+	 * Check for overflow; dev_loss_tmo is u32
+	 */
+	if (*val > UINT_MAX)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int fc_rport_set_dev_loss_tmo(struct fc_rport *rport,
+				     unsigned long val)
+{
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+
+	if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
+	    (rport->port_state == FC_PORTSTATE_DELETED) ||
+	    (rport->port_state == FC_PORTSTATE_NOTPRESENT))
+		return -EBUSY;
+	/*
+	 * Check for overflow; dev_loss_tmo is u32
+	 */
+	if (val > UINT_MAX)
+		return -EINVAL;
+
+	/*
+	 * If fast_io_fail is off we have to cap
+	 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
+	 */
+	if (rport->fast_io_fail_tmo == -1 &&
+	    val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
+		return -EINVAL;
+
+	i->f->set_rport_dev_loss_tmo(rport, val);
+	return 0;
+}
+
+fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
+static ssize_t
+store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	struct fc_rport *rport = transport_class_to_rport(dev);
+	unsigned long val;
+	int rc;
+
+	rc = fc_str_to_dev_loss(buf, &val);
+	if (rc)
+		return rc;
+
+	rc = fc_rport_set_dev_loss_tmo(rport, val);
+	if (rc)
+		return rc;
+	return count;
+}
+static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
+		show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
+
+
+/* Private Remote Port Attributes */
+
+fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);
+
+static ssize_t
+show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
+		     char *buf)
+{
+	struct fc_rport *rport = transport_class_to_rport(dev);
+
+	/* identify any roles that are port_id specific */
+	if ((rport->port_id != -1) &&
+	    (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
+					FC_WELLKNOWN_PORTID_MASK) {
+		switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
+		case FC_FPORT_PORTID:
+			return snprintf(buf, 30, "Fabric Port\n");
+		case FC_FABCTLR_PORTID:
+			return snprintf(buf, 30, "Fabric Controller\n");
+		case FC_DIRSRVR_PORTID:
+			return snprintf(buf, 30, "Directory Server\n");
+		case FC_TIMESRVR_PORTID:
+			return snprintf(buf, 30, "Time Server\n");
+		case FC_MGMTSRVR_PORTID:
+			return snprintf(buf, 30, "Management Server\n");
+		default:
+			return snprintf(buf, 30, "Unknown Fabric Entity\n");
+		}
+	} else {
+		if (rport->roles == FC_PORT_ROLE_UNKNOWN)
+			return snprintf(buf, 20, "unknown\n");
+		return get_fc_port_roles_names(rport->roles, buf);
+	}
+}
+static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
+		show_fc_rport_roles, NULL);
+
+fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
+fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);
+
+/*
+ * fast_io_fail_tmo attribute
+ */
+static ssize_t
+show_fc_rport_fast_io_fail_tmo (struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct fc_rport *rport = transport_class_to_rport(dev);
+
+	if (rport->fast_io_fail_tmo == -1)
+		return snprintf(buf, 5, "off\n");
+	return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
+}
+
+static ssize_t
+store_fc_rport_fast_io_fail_tmo(struct device *dev,
+				struct device_attribute *attr, const char *buf,
+				size_t count)
+{
+	int val;
+	char *cp;
+	struct fc_rport *rport = transport_class_to_rport(dev);
+
+	if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
+	    (rport->port_state == FC_PORTSTATE_DELETED) ||
+	    (rport->port_state == FC_PORTSTATE_NOTPRESENT))
+		return -EBUSY;
+	if (strncmp(buf, "off", 3) == 0)
+		rport->fast_io_fail_tmo = -1;
+	else {
+		val = simple_strtoul(buf, &cp, 0);
+		if ((*cp && (*cp != '\n')) || (val < 0))
+			return -EINVAL;
+		/*
+		 * Cap fast_io_fail by dev_loss_tmo or
+		 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
+		 */
+		if ((val >= rport->dev_loss_tmo) ||
+		    (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
+			return -EINVAL;
+
+		rport->fast_io_fail_tmo = val;
+	}
+	return count;
+}
+static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
+	show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
+
+
+/*
+ * FC SCSI Target Attribute Management
+ */
+
+/*
+ * Note: in the target show function we recognize when the remote
+ *  port is in the hierarchy and do not allow the driver to get
+ *  involved in sysfs functions. The driver only gets involved if
+ *  it's the "old" style that doesn't use rports.
+ */
+#define fc_starget_show_function(field, format_string, sz, cast)	\
+static ssize_t								\
+show_fc_starget_##field (struct device *dev, 				\
+			 struct device_attribute *attr, char *buf)	\
+{									\
+	struct scsi_target *starget = transport_class_to_starget(dev);	\
+	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);	\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	struct fc_rport *rport = starget_to_rport(starget);		\
+	if (rport)							\
+		fc_starget_##field(starget) = rport->field;		\
+	else if (i->f->get_starget_##field)				\
+		i->f->get_starget_##field(starget);			\
+	return snprintf(buf, sz, format_string, 			\
+		cast fc_starget_##field(starget)); 			\
+}
+
+#define fc_starget_rd_attr(field, format_string, sz)			\
+	fc_starget_show_function(field, format_string, sz, )		\
+static FC_DEVICE_ATTR(starget, field, S_IRUGO,			\
+			 show_fc_starget_##field, NULL)
+
+#define fc_starget_rd_attr_cast(field, format_string, sz, cast)		\
+	fc_starget_show_function(field, format_string, sz, (cast))	\
+static FC_DEVICE_ATTR(starget, field, S_IRUGO,			\
+			  show_fc_starget_##field, NULL)
+
+#define SETUP_STARGET_ATTRIBUTE_RD(field)				\
+	i->private_starget_attrs[count] = device_attr_starget_##field; \
+	i->private_starget_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_starget_attrs[count].store = NULL;			\
+	i->starget_attrs[count] = &i->private_starget_attrs[count];	\
+	if (i->f->show_starget_##field)					\
+		count++
+
+#define SETUP_STARGET_ATTRIBUTE_RW(field)				\
+	i->private_starget_attrs[count] = device_attr_starget_##field; \
+	if (!i->f->set_starget_##field) {				\
+		i->private_starget_attrs[count].attr.mode = S_IRUGO;	\
+		i->private_starget_attrs[count].store = NULL;		\
+	}								\
+	i->starget_attrs[count] = &i->private_starget_attrs[count];	\
+	if (i->f->show_starget_##field)					\
+		count++
+
+/* The FC Transport SCSI Target Attributes: */
+fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_starget_rd_attr(port_id, "0x%06x\n", 20);
+
+
+/*
+ * FC Virtual Port Attribute Management
+ */
+
+#define fc_vport_show_function(field, format_string, sz, cast)		\
+static ssize_t								\
+show_fc_vport_##field (struct device *dev, 				\
+		       struct device_attribute *attr, char *buf)	\
+{									\
+	struct fc_vport *vport = transport_class_to_vport(dev);		\
+	struct Scsi_Host *shost = vport_to_shost(vport);		\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	if ((i->f->get_vport_##field) &&				\
+	    !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))	\
+		i->f->get_vport_##field(vport);				\
+	return snprintf(buf, sz, format_string, cast vport->field); 	\
+}
+
+#define fc_vport_store_function(field)					\
+static ssize_t								\
+store_fc_vport_##field(struct device *dev,				\
+		       struct device_attribute *attr,			\
+		       const char *buf,	size_t count)			\
+{									\
+	int val;							\
+	struct fc_vport *vport = transport_class_to_vport(dev);		\
+	struct Scsi_Host *shost = vport_to_shost(vport);		\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	char *cp;							\
+	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))	\
+		return -EBUSY;						\
+	val = simple_strtoul(buf, &cp, 0);				\
+	if (*cp && (*cp != '\n'))					\
+		return -EINVAL;						\
+	i->f->set_vport_##field(vport, val);				\
+	return count;							\
+}
+
+#define fc_vport_store_str_function(field, slen)			\
+static ssize_t								\
+store_fc_vport_##field(struct device *dev,				\
+		       struct device_attribute *attr, 			\
+		       const char *buf,	size_t count)			\
+{									\
+	struct fc_vport *vport = transport_class_to_vport(dev);		\
+	struct Scsi_Host *shost = vport_to_shost(vport);		\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	unsigned int cnt=count;						\
+									\
+	/* count may include a LF at end of string */			\
+	if (buf[cnt-1] == '\n')						\
+		cnt--;							\
+	if (cnt > ((slen) - 1))						\
+		return -EINVAL;						\
+	memcpy(vport->field, buf, cnt);					\
+	i->f->set_vport_##field(vport);					\
+	return count;							\
+}
+
+#define fc_vport_rd_attr(field, format_string, sz)			\
+	fc_vport_show_function(field, format_string, sz, )		\
+static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
+			 show_fc_vport_##field, NULL)
+
+#define fc_vport_rd_attr_cast(field, format_string, sz, cast)		\
+	fc_vport_show_function(field, format_string, sz, (cast))	\
+static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
+			  show_fc_vport_##field, NULL)
+
+#define fc_vport_rw_attr(field, format_string, sz)			\
+	fc_vport_show_function(field, format_string, sz, )		\
+	fc_vport_store_function(field)					\
+static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,		\
+			show_fc_vport_##field,				\
+			store_fc_vport_##field)
+
+#define fc_private_vport_show_function(field, format_string, sz, cast)	\
+static ssize_t								\
+show_fc_vport_##field (struct device *dev,				\
+		       struct device_attribute *attr, char *buf)	\
+{									\
+	struct fc_vport *vport = transport_class_to_vport(dev);		\
+	return snprintf(buf, sz, format_string, cast vport->field); 	\
+}
+
+#define fc_private_vport_store_u32_function(field)			\
+static ssize_t								\
+store_fc_vport_##field(struct device *dev,				\
+		       struct device_attribute *attr,			\
+		       const char *buf,	size_t count)			\
+{									\
+	u32 val;							\
+	struct fc_vport *vport = transport_class_to_vport(dev);		\
+	char *cp;							\
+	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))		\
+		return -EBUSY;						\
+	val = simple_strtoul(buf, &cp, 0);				\
+	if (*cp && (*cp != '\n'))					\
+		return -EINVAL;						\
+	vport->field = val;						\
+	return count;							\
+}
+
+
+#define fc_private_vport_rd_attr(field, format_string, sz)		\
+	fc_private_vport_show_function(field, format_string, sz, )	\
+static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
+			 show_fc_vport_##field, NULL)
+
+#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)	\
+	fc_private_vport_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
+			  show_fc_vport_##field, NULL)
+
+#define fc_private_vport_rw_u32_attr(field, format_string, sz)		\
+	fc_private_vport_show_function(field, format_string, sz, )	\
+	fc_private_vport_store_u32_function(field)			\
+static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,		\
+			show_fc_vport_##field,				\
+			store_fc_vport_##field)
+
+
+#define fc_private_vport_rd_enum_attr(title, maxlen)			\
+static ssize_t								\
+show_fc_vport_##title (struct device *dev,				\
+		       struct device_attribute *attr,			\
+		       char *buf)					\
+{									\
+	struct fc_vport *vport = transport_class_to_vport(dev);		\
+	const char *name;						\
+	name = get_fc_##title##_name(vport->title);			\
+	if (!name)							\
+		return -EINVAL;						\
+	return snprintf(buf, maxlen, "%s\n", name);			\
+}									\
+static FC_DEVICE_ATTR(vport, title, S_IRUGO,			\
+			show_fc_vport_##title, NULL)
+
+
+#define SETUP_VPORT_ATTRIBUTE_RD(field)					\
+	i->private_vport_attrs[count] = device_attr_vport_##field; \
+	i->private_vport_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_vport_attrs[count].store = NULL;			\
+	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
+	if (i->f->get_##field)						\
+		count++
+	/* NOTE: Above MACRO differs: checks function not show bit */
+
+#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)				\
+	i->private_vport_attrs[count] = device_attr_vport_##field; \
+	i->private_vport_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_vport_attrs[count].store = NULL;			\
+	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
+	count++
+
+#define SETUP_VPORT_ATTRIBUTE_WR(field)					\
+	i->private_vport_attrs[count] = device_attr_vport_##field; \
+	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
+	if (i->f->field)						\
+		count++
+	/* NOTE: Above MACRO differs: checks function */
+
+#define SETUP_VPORT_ATTRIBUTE_RW(field)					\
+	i->private_vport_attrs[count] = device_attr_vport_##field; \
+	if (!i->f->set_vport_##field) {					\
+		i->private_vport_attrs[count].attr.mode = S_IRUGO;	\
+		i->private_vport_attrs[count].store = NULL;		\
+	}								\
+	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
+	count++
+	/* NOTE: Above MACRO differs: does not check show bit */
+
+#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)				\
+{									\
+	i->private_vport_attrs[count] = device_attr_vport_##field; \
+	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
+	count++;							\
+}
+
+
+/* The FC Transport Virtual Port Attributes: */
+
+/* Fixed Virtual Port Attributes */
+
+/* Dynamic Virtual Port Attributes */
+
+/* Private Virtual Port Attributes */
+
+fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
+fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
+fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+
+static ssize_t
+show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
+		     char *buf)
+{
+	struct fc_vport *vport = transport_class_to_vport(dev);
+
+	if (vport->roles == FC_PORT_ROLE_UNKNOWN)
+		return snprintf(buf, 20, "unknown\n");
+	return get_fc_port_roles_names(vport->roles, buf);
+}
+static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
+
+fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);
+
+fc_private_vport_show_function(symbolic_name, "%s\n",
+		FC_VPORT_SYMBOLIC_NAMELEN + 1, )
+fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
+static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
+		show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);
+
+static ssize_t
+store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
+		      const char *buf, size_t count)
+{
+	struct fc_vport *vport = transport_class_to_vport(dev);
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING | FC_VPORT_DELETING)) {
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		return -EBUSY;
+	}
+	vport->flags |= FC_VPORT_DELETING;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	fc_queue_work(shost, &vport->vport_delete_work);
+	return count;
+}
+static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
+			NULL, store_fc_vport_delete);
+
+
+/*
+ * Enable/Disable vport
+ *  Write "1" to disable, write "0" to enable
+ */
+static ssize_t
+store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
+		       const char *buf,
+			   size_t count)
+{
+	struct fc_vport *vport = transport_class_to_vport(dev);
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	int stat;
+
+	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
+		return -EBUSY;
+
+	if (*buf == '0') {
+		if (vport->vport_state != FC_VPORT_DISABLED)
+			return -EALREADY;
+	} else if (*buf == '1') {
+		if (vport->vport_state == FC_VPORT_DISABLED)
+			return -EALREADY;
+	} else
+		return -EINVAL;
+
+	stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
+	return stat ? stat : count;
+}
+static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
+			NULL, store_fc_vport_disable);
+
+
+/*
+ * Host Attribute Management
+ */
+
+#define fc_host_show_function(field, format_string, sz, cast)		\
+static ssize_t								\
+show_fc_host_##field (struct device *dev,				\
+		      struct device_attribute *attr, char *buf)		\
+{									\
+	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	if (i->f->get_host_##field)					\
+		i->f->get_host_##field(shost);				\
+	return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
+}
+
+#define fc_host_store_function(field)					\
+static ssize_t								\
+store_fc_host_##field(struct device *dev, 				\
+		      struct device_attribute *attr,			\
+		      const char *buf,	size_t count)			\
+{									\
+	int val;							\
+	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	char *cp;							\
+									\
+	val = simple_strtoul(buf, &cp, 0);				\
+	if (*cp && (*cp != '\n'))					\
+		return -EINVAL;						\
+	i->f->set_host_##field(shost, val);				\
+	return count;							\
+}
+
+#define fc_host_store_str_function(field, slen)				\
+static ssize_t								\
+store_fc_host_##field(struct device *dev,				\
+		      struct device_attribute *attr,			\
+		      const char *buf, size_t count)			\
+{									\
+	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	unsigned int cnt=count;						\
+									\
+	/* count may include a LF at end of string */			\
+	if (buf[cnt-1] == '\n')						\
+		cnt--;							\
+	if (cnt > ((slen) - 1))						\
+		return -EINVAL;						\
+	memcpy(fc_host_##field(shost), buf, cnt);			\
+	i->f->set_host_##field(shost);					\
+	return count;							\
+}
+
+#define fc_host_rd_attr(field, format_string, sz)			\
+	fc_host_show_function(field, format_string, sz, )		\
+static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
+			 show_fc_host_##field, NULL)
+
+#define fc_host_rd_attr_cast(field, format_string, sz, cast)		\
+	fc_host_show_function(field, format_string, sz, (cast))		\
+static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
+			  show_fc_host_##field, NULL)
+
+#define fc_host_rw_attr(field, format_string, sz)			\
+	fc_host_show_function(field, format_string, sz, )		\
+	fc_host_store_function(field)					\
+static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,		\
+			show_fc_host_##field,				\
+			store_fc_host_##field)
+
+#define fc_host_rd_enum_attr(title, maxlen)				\
+static ssize_t								\
+show_fc_host_##title (struct device *dev,				\
+		      struct device_attribute *attr, char *buf)		\
+{									\
+	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
+	struct fc_internal *i = to_fc_internal(shost->transportt);	\
+	const char *name;						\
+	if (i->f->get_host_##title)					\
+		i->f->get_host_##title(shost);				\
+	name = get_fc_##title##_name(fc_host_##title(shost));		\
+	if (!name)							\
+		return -EINVAL;						\
+	return snprintf(buf, maxlen, "%s\n", name);			\
+}									\
+static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
+
+#define SETUP_HOST_ATTRIBUTE_RD(field)					\
+	i->private_host_attrs[count] = device_attr_host_##field;	\
+	i->private_host_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_host_attrs[count].store = NULL;			\
+	i->host_attrs[count] = &i->private_host_attrs[count];		\
+	if (i->f->show_host_##field)					\
+		count++
+
+#define SETUP_HOST_ATTRIBUTE_RD_NS(field)				\
+	i->private_host_attrs[count] = device_attr_host_##field;	\
+	i->private_host_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_host_attrs[count].store = NULL;			\
+	i->host_attrs[count] = &i->private_host_attrs[count];		\
+	count++
+
+#define SETUP_HOST_ATTRIBUTE_RW(field)					\
+	i->private_host_attrs[count] = device_attr_host_##field;	\
+	if (!i->f->set_host_##field) {					\
+		i->private_host_attrs[count].attr.mode = S_IRUGO;	\
+		i->private_host_attrs[count].store = NULL;		\
+	}								\
+	i->host_attrs[count] = &i->private_host_attrs[count];		\
+	if (i->f->show_host_##field)					\
+		count++
+
+
+#define fc_private_host_show_function(field, format_string, sz, cast)	\
+static ssize_t								\
+show_fc_host_##field (struct device *dev,				\
+		      struct device_attribute *attr, char *buf)		\
+{									\
+	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
+	return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
+}
+
+#define fc_private_host_rd_attr(field, format_string, sz)		\
+	fc_private_host_show_function(field, format_string, sz, )	\
+static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
+			 show_fc_host_##field, NULL)
+
+#define fc_private_host_rd_attr_cast(field, format_string, sz, cast)	\
+	fc_private_host_show_function(field, format_string, sz, (cast)) \
+static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
+			  show_fc_host_##field, NULL)
+
+#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)			\
+	i->private_host_attrs[count] = device_attr_host_##field;	\
+	i->private_host_attrs[count].attr.mode = S_IRUGO;		\
+	i->private_host_attrs[count].store = NULL;			\
+	i->host_attrs[count] = &i->private_host_attrs[count];		\
+	count++
+
+#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)			\
+{									\
+	i->private_host_attrs[count] = device_attr_host_##field;	\
+	i->host_attrs[count] = &i->private_host_attrs[count];		\
+	count++;							\
+}
+
+
+/* Fixed Host Attributes */
+
+static ssize_t
+show_fc_host_supported_classes (struct device *dev,
+			        struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+
+	if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
+		return snprintf(buf, 20, "unspecified\n");
+
+	return get_fc_cos_names(fc_host_supported_classes(shost), buf);
+}
+static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
+		show_fc_host_supported_classes, NULL);
+
+static ssize_t
+show_fc_host_supported_fc4s (struct device *dev,
+			     struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
+}
+static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
+		show_fc_host_supported_fc4s, NULL);
+
+static ssize_t
+show_fc_host_supported_speeds (struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+
+	if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
+		return snprintf(buf, 20, "unknown\n");
+
+	return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
+}
+static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
+		show_fc_host_supported_speeds, NULL);
+
+
+fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
+fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
+fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20,
+			     unsigned long long);
+fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
+fc_private_host_rd_attr(max_npiv_vports, "%u\n", 20);
+fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
+fc_private_host_rd_attr(manufacturer, "%s\n", FC_SERIAL_NUMBER_SIZE + 1);
+fc_private_host_rd_attr(model, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
+fc_private_host_rd_attr(model_description, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
+fc_private_host_rd_attr(hardware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+fc_private_host_rd_attr(driver_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+fc_private_host_rd_attr(firmware_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+fc_private_host_rd_attr(optionrom_version, "%s\n", FC_VERSION_STRING_SIZE + 1);
+
+
+/* Dynamic Host Attributes */
+
+static ssize_t
+show_fc_host_active_fc4s (struct device *dev,
+			  struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+
+	if (i->f->get_host_active_fc4s)
+		i->f->get_host_active_fc4s(shost);
+
+	return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost));
+}
+static FC_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
+		show_fc_host_active_fc4s, NULL);
+
+static ssize_t
+show_fc_host_speed (struct device *dev,
+		    struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+
+	if (i->f->get_host_speed)
+		i->f->get_host_speed(shost);
+
+	if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN)
+		return snprintf(buf, 20, "unknown\n");
+
+	return get_fc_port_speed_names(fc_host_speed(shost), buf);
+}
+static FC_DEVICE_ATTR(host, speed, S_IRUGO,
+		show_fc_host_speed, NULL);
+
+
+fc_host_rd_attr(port_id, "0x%06x\n", 20);
+fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN);
+fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
+fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
+fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1);
+
+fc_private_host_show_function(system_hostname, "%s\n",
+		FC_SYMBOLIC_NAME_SIZE + 1, )
+fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE)
+static FC_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR,
+		show_fc_host_system_hostname, store_fc_host_system_hostname);
+
+
+/* Private Host Attributes */
+
+static ssize_t
+show_fc_private_host_tgtid_bind_type(struct device *dev,
+				     struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	const char *name;
+
+	name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost));
+	if (!name)
+		return -EINVAL;
+	return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name);
+}
+
+#define get_list_head_entry(pos, head, member) 		\
+	pos = list_entry((head)->next, typeof(*pos), member)
+
+static ssize_t
+store_fc_private_host_tgtid_bind_type(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_rport *rport;
+ 	enum fc_tgtid_binding_type val;
+	unsigned long flags;
+
+	if (get_fc_tgtid_bind_type_match(buf, &val))
+		return -EINVAL;
+
+	/* if changing bind type, purge all unused consistent bindings */
+	if (val != fc_host_tgtid_bind_type(shost)) {
+		spin_lock_irqsave(shost->host_lock, flags);
+		while (!list_empty(&fc_host_rport_bindings(shost))) {
+			get_list_head_entry(rport,
+				&fc_host_rport_bindings(shost), peers);
+			list_del(&rport->peers);
+			rport->port_state = FC_PORTSTATE_DELETED;
+			fc_queue_work(shost, &rport->rport_delete_work);
+		}
+		spin_unlock_irqrestore(shost->host_lock, flags);
+	}
+
+	fc_host_tgtid_bind_type(shost) = val;
+	return count;
+}
+
+static FC_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
+			show_fc_private_host_tgtid_bind_type,
+			store_fc_private_host_tgtid_bind_type);
+
+static ssize_t
+store_fc_private_host_issue_lip(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	int ret;
+
+	/* ignore any data value written to the attribute */
+	if (i->f->issue_fc_host_lip) {
+		ret = i->f->issue_fc_host_lip(shost);
+		return ret ? ret: count;
+	}
+
+	return -ENOENT;
+}
+
+static FC_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL,
+			store_fc_private_host_issue_lip);
+
+static ssize_t
+store_fc_private_host_dev_loss_tmo(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	struct fc_rport *rport;
+	unsigned long val, flags;
+	int rc;
+
+	rc = fc_str_to_dev_loss(buf, &val);
+	if (rc)
+		return rc;
+
+	fc_host_dev_loss_tmo(shost) = val;
+	spin_lock_irqsave(shost->host_lock, flags);
+	list_for_each_entry(rport, &fc_host->rports, peers)
+		fc_rport_set_dev_loss_tmo(rport, val);
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	return count;
+}
+
+fc_private_host_show_function(dev_loss_tmo, "%d\n", 20, );
+static FC_DEVICE_ATTR(host, dev_loss_tmo, S_IRUGO | S_IWUSR,
+		      show_fc_host_dev_loss_tmo,
+		      store_fc_private_host_dev_loss_tmo);
+
+fc_private_host_rd_attr(npiv_vports_inuse, "%u\n", 20);
+
+/*
+ * Host Statistics Management
+ */
+
+/* Show a given attribute in the statistics group */
+static ssize_t
+fc_stat_show(const struct device *dev, char *buf, unsigned long offset)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	struct fc_host_statistics *stats;
+	ssize_t ret = -ENOENT;
+
+	if (offset > sizeof(struct fc_host_statistics) ||
+	    offset % sizeof(u64) != 0)
+		WARN_ON(1);
+
+	if (i->f->get_fc_host_stats) {
+		stats = (i->f->get_fc_host_stats)(shost);
+		if (stats)
+			ret = snprintf(buf, 20, "0x%llx\n",
+			      (unsigned long long)*(u64 *)(((u8 *) stats) + offset));
+	}
+	return ret;
+}
+
+
+/* generate a read-only statistics attribute */
+#define fc_host_statistic(name)						\
+static ssize_t show_fcstat_##name(struct device *cd,			\
+				  struct device_attribute *attr,	\
+				  char *buf)				\
+{									\
+	return fc_stat_show(cd, buf, 					\
+			    offsetof(struct fc_host_statistics, name));	\
+}									\
+static FC_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL)
+
+fc_host_statistic(seconds_since_last_reset);
+fc_host_statistic(tx_frames);
+fc_host_statistic(tx_words);
+fc_host_statistic(rx_frames);
+fc_host_statistic(rx_words);
+fc_host_statistic(lip_count);
+fc_host_statistic(nos_count);
+fc_host_statistic(error_frames);
+fc_host_statistic(dumped_frames);
+fc_host_statistic(link_failure_count);
+fc_host_statistic(loss_of_sync_count);
+fc_host_statistic(loss_of_signal_count);
+fc_host_statistic(prim_seq_protocol_err_count);
+fc_host_statistic(invalid_tx_word_count);
+fc_host_statistic(invalid_crc_count);
+fc_host_statistic(fcp_input_requests);
+fc_host_statistic(fcp_output_requests);
+fc_host_statistic(fcp_control_requests);
+fc_host_statistic(fcp_input_megabytes);
+fc_host_statistic(fcp_output_megabytes);
+fc_host_statistic(fcp_packet_alloc_failures);
+fc_host_statistic(fcp_packet_aborts);
+fc_host_statistic(fcp_frame_alloc_failures);
+fc_host_statistic(fc_no_free_exch);
+fc_host_statistic(fc_no_free_exch_xid);
+fc_host_statistic(fc_xid_not_found);
+fc_host_statistic(fc_xid_busy);
+fc_host_statistic(fc_seq_not_found);
+fc_host_statistic(fc_non_bls_resp);
+
+static ssize_t
+fc_reset_statistics(struct device *dev, struct device_attribute *attr,
+		    const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+
+	/* ignore any data value written to the attribute */
+	if (i->f->reset_fc_host_stats) {
+		i->f->reset_fc_host_stats(shost);
+		return count;
+	}
+
+	return -ENOENT;
+}
+static FC_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
+				fc_reset_statistics);
+
+static struct attribute *fc_statistics_attrs[] = {
+	&device_attr_host_seconds_since_last_reset.attr,
+	&device_attr_host_tx_frames.attr,
+	&device_attr_host_tx_words.attr,
+	&device_attr_host_rx_frames.attr,
+	&device_attr_host_rx_words.attr,
+	&device_attr_host_lip_count.attr,
+	&device_attr_host_nos_count.attr,
+	&device_attr_host_error_frames.attr,
+	&device_attr_host_dumped_frames.attr,
+	&device_attr_host_link_failure_count.attr,
+	&device_attr_host_loss_of_sync_count.attr,
+	&device_attr_host_loss_of_signal_count.attr,
+	&device_attr_host_prim_seq_protocol_err_count.attr,
+	&device_attr_host_invalid_tx_word_count.attr,
+	&device_attr_host_invalid_crc_count.attr,
+	&device_attr_host_fcp_input_requests.attr,
+	&device_attr_host_fcp_output_requests.attr,
+	&device_attr_host_fcp_control_requests.attr,
+	&device_attr_host_fcp_input_megabytes.attr,
+	&device_attr_host_fcp_output_megabytes.attr,
+	&device_attr_host_fcp_packet_alloc_failures.attr,
+	&device_attr_host_fcp_packet_aborts.attr,
+	&device_attr_host_fcp_frame_alloc_failures.attr,
+	&device_attr_host_fc_no_free_exch.attr,
+	&device_attr_host_fc_no_free_exch_xid.attr,
+	&device_attr_host_fc_xid_not_found.attr,
+	&device_attr_host_fc_xid_busy.attr,
+	&device_attr_host_fc_seq_not_found.attr,
+	&device_attr_host_fc_non_bls_resp.attr,
+	&device_attr_host_reset_statistics.attr,
+	NULL
+};
+
+static struct attribute_group fc_statistics_group = {
+	.name = "statistics",
+	.attrs = fc_statistics_attrs,
+};
+
+
+/* Host Vport Attributes */
+
+static int
+fc_parse_wwn(const char *ns, u64 *nm)
+{
+	unsigned int i, j;
+	u8 wwn[8];
+
+	memset(wwn, 0, sizeof(wwn));
+
+	/* Validate and store the new name */
+	for (i=0, j=0; i < 16; i++) {
+		int value;
+
+		value = hex_to_bin(*ns++);
+		if (value >= 0)
+			j = (j << 4) | value;
+		else
+			return -EINVAL;
+		if (i % 2) {
+			wwn[i/2] = j & 0xff;
+			j = 0;
+		}
+	}
+
+	*nm = wwn_to_u64(wwn);
+
+	return 0;
+}
+
+
+/*
+ * "Short-cut" sysfs variable to create a new vport on a FC Host.
+ * Input is a string of the form "<WWPN>:<WWNN>". Other attributes
+ * will default to a NPIV-based FCP_Initiator; The WWNs are specified
+ * as hex characters, and may *not* contain any prefixes (e.g. 0x, x, etc)
+ */
+static ssize_t
+store_fc_host_vport_create(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_vport_identifiers vid;
+	struct fc_vport *vport;
+	unsigned int cnt=count;
+	int stat;
+
+	memset(&vid, 0, sizeof(vid));
+
+	/* count may include a LF at end of string */
+	if (buf[cnt-1] == '\n')
+		cnt--;
+
+	/* validate we have enough characters for WWPN */
+	if ((cnt != (16+1+16)) || (buf[16] != ':'))
+		return -EINVAL;
+
+	stat = fc_parse_wwn(&buf[0], &vid.port_name);
+	if (stat)
+		return stat;
+
+	stat = fc_parse_wwn(&buf[17], &vid.node_name);
+	if (stat)
+		return stat;
+
+	vid.roles = FC_PORT_ROLE_FCP_INITIATOR;
+	vid.vport_type = FC_PORTTYPE_NPIV;
+	/* vid.symbolic_name is already zero/NULL's */
+	vid.disable = false;		/* always enabled */
+
+	/* we only allow support on Channel 0 !!! */
+	stat = fc_vport_setup(shost, 0, &shost->shost_gendev, &vid, &vport);
+	return stat ? stat : count;
+}
+static FC_DEVICE_ATTR(host, vport_create, S_IWUSR, NULL,
+			store_fc_host_vport_create);
+
+
+/*
+ * "Short-cut" sysfs variable to delete a vport on a FC Host.
+ * Vport is identified by a string containing "<WWPN>:<WWNN>".
+ * The WWNs are specified as hex characters, and may *not* contain
+ * any prefixes (e.g. 0x, x, etc)
+ */
+static ssize_t
+store_fc_host_vport_delete(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct Scsi_Host *shost = transport_class_to_shost(dev);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	struct fc_vport *vport;
+	u64 wwpn, wwnn;
+	unsigned long flags;
+	unsigned int cnt=count;
+	int stat, match;
+
+	/* count may include a LF at end of string */
+	if (buf[cnt-1] == '\n')
+		cnt--;
+
+	/* validate we have enough characters for WWPN */
+	if ((cnt != (16+1+16)) || (buf[16] != ':'))
+		return -EINVAL;
+
+	stat = fc_parse_wwn(&buf[0], &wwpn);
+	if (stat)
+		return stat;
+
+	stat = fc_parse_wwn(&buf[17], &wwnn);
+	if (stat)
+		return stat;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	match = 0;
+	/* we only allow support on Channel 0 !!! */
+	list_for_each_entry(vport, &fc_host->vports, peers) {
+		if ((vport->channel == 0) &&
+		    (vport->port_name == wwpn) && (vport->node_name == wwnn)) {
+			if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
+				break;
+			vport->flags |= FC_VPORT_DELETING;
+			match = 1;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	if (!match)
+		return -ENODEV;
+
+	stat = fc_vport_terminate(vport);
+	return stat ? stat : count;
+}
+static FC_DEVICE_ATTR(host, vport_delete, S_IWUSR, NULL,
+			store_fc_host_vport_delete);
+
+
+static int fc_host_match(struct attribute_container *cont,
+			  struct device *dev)
+{
+	struct Scsi_Host *shost;
+	struct fc_internal *i;
+
+	if (!scsi_is_host_device(dev))
+		return 0;
+
+	shost = dev_to_shost(dev);
+	if (!shost->transportt  || shost->transportt->host_attrs.ac.class
+	    != &fc_host_class.class)
+		return 0;
+
+	i = to_fc_internal(shost->transportt);
+
+	return &i->t.host_attrs.ac == cont;
+}
+
+static int fc_target_match(struct attribute_container *cont,
+			    struct device *dev)
+{
+	struct Scsi_Host *shost;
+	struct fc_internal *i;
+
+	if (!scsi_is_target_device(dev))
+		return 0;
+
+	shost = dev_to_shost(dev->parent);
+	if (!shost->transportt  || shost->transportt->host_attrs.ac.class
+	    != &fc_host_class.class)
+		return 0;
+
+	i = to_fc_internal(shost->transportt);
+
+	return &i->t.target_attrs.ac == cont;
+}
+
+static void fc_rport_dev_release(struct device *dev)
+{
+	struct fc_rport *rport = dev_to_rport(dev);
+	put_device(dev->parent);
+	kfree(rport);
+}
+
+int scsi_is_fc_rport(const struct device *dev)
+{
+	return dev->release == fc_rport_dev_release;
+}
+EXPORT_SYMBOL(scsi_is_fc_rport);
+
+static int fc_rport_match(struct attribute_container *cont,
+			    struct device *dev)
+{
+	struct Scsi_Host *shost;
+	struct fc_internal *i;
+
+	if (!scsi_is_fc_rport(dev))
+		return 0;
+
+	shost = dev_to_shost(dev->parent);
+	if (!shost->transportt  || shost->transportt->host_attrs.ac.class
+	    != &fc_host_class.class)
+		return 0;
+
+	i = to_fc_internal(shost->transportt);
+
+	return &i->rport_attr_cont.ac == cont;
+}
+
+
+static void fc_vport_dev_release(struct device *dev)
+{
+	struct fc_vport *vport = dev_to_vport(dev);
+	put_device(dev->parent);		/* release kobj parent */
+	kfree(vport);
+}
+
+static int scsi_is_fc_vport(const struct device *dev)
+{
+	return dev->release == fc_vport_dev_release;
+}
+
+static int fc_vport_match(struct attribute_container *cont,
+			    struct device *dev)
+{
+	struct fc_vport *vport;
+	struct Scsi_Host *shost;
+	struct fc_internal *i;
+
+	if (!scsi_is_fc_vport(dev))
+		return 0;
+	vport = dev_to_vport(dev);
+
+	shost = vport_to_shost(vport);
+	if (!shost->transportt  || shost->transportt->host_attrs.ac.class
+	    != &fc_host_class.class)
+		return 0;
+
+	i = to_fc_internal(shost->transportt);
+	return &i->vport_attr_cont.ac == cont;
+}
+
+
+/**
+ * fc_eh_timed_out - FC Transport I/O timeout intercept handler
+ * @scmd:	The SCSI command which timed out
+ *
+ * This routine protects against error handlers getting invoked while a
+ * rport is in a blocked state, typically due to a temporarily loss of
+ * connectivity. If the error handlers are allowed to proceed, requests
+ * to abort i/o, reset the target, etc will likely fail as there is no way
+ * to communicate with the device to perform the requested function. These
+ * failures may result in the midlayer taking the device offline, requiring
+ * manual intervention to restore operation.
+ *
+ * This routine, called whenever an i/o times out, validates the state of
+ * the underlying rport. If the rport is blocked, it returns
+ * EH_RESET_TIMER, which will continue to reschedule the timeout.
+ * Eventually, either the device will return, or devloss_tmo will fire,
+ * and when the timeout then fires, it will be handled normally.
+ * If the rport is not blocked, normal error handling continues.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+enum blk_eh_timer_return
+fc_eh_timed_out(struct scsi_cmnd *scmd)
+{
+	struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device));
+
+	if (rport->port_state == FC_PORTSTATE_BLOCKED)
+		return BLK_EH_RESET_TIMER;
+
+	return BLK_EH_DONE;
+}
+EXPORT_SYMBOL(fc_eh_timed_out);
+
+/*
+ * Called by fc_user_scan to locate an rport on the shost that
+ * matches the channel and target id, and invoke scsi_scan_target()
+ * on the rport.
+ */
+static void
+fc_user_scan_tgt(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
+{
+	struct fc_rport *rport;
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	list_for_each_entry(rport, &fc_host_rports(shost), peers) {
+		if (rport->scsi_target_id == -1)
+			continue;
+
+		if (rport->port_state != FC_PORTSTATE_ONLINE)
+			continue;
+
+		if ((channel == rport->channel) &&
+		    (id == rport->scsi_target_id)) {
+			spin_unlock_irqrestore(shost->host_lock, flags);
+			scsi_scan_target(&rport->dev, channel, id, lun,
+					 SCSI_SCAN_MANUAL);
+			return;
+		}
+	}
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+/*
+ * Called via sysfs scan routines. Necessary, as the FC transport
+ * wants to place all target objects below the rport object. So this
+ * routine must invoke the scsi_scan_target() routine with the rport
+ * object as the parent.
+ */
+static int
+fc_user_scan(struct Scsi_Host *shost, uint channel, uint id, u64 lun)
+{
+	uint chlo, chhi;
+	uint tgtlo, tgthi;
+
+	if (((channel != SCAN_WILD_CARD) && (channel > shost->max_channel)) ||
+	    ((id != SCAN_WILD_CARD) && (id >= shost->max_id)) ||
+	    ((lun != SCAN_WILD_CARD) && (lun > shost->max_lun)))
+		return -EINVAL;
+
+	if (channel == SCAN_WILD_CARD) {
+		chlo = 0;
+		chhi = shost->max_channel + 1;
+	} else {
+		chlo = channel;
+		chhi = channel + 1;
+	}
+
+	if (id == SCAN_WILD_CARD) {
+		tgtlo = 0;
+		tgthi = shost->max_id;
+	} else {
+		tgtlo = id;
+		tgthi = id + 1;
+	}
+
+	for ( ; chlo < chhi; chlo++)
+		for ( ; tgtlo < tgthi; tgtlo++)
+			fc_user_scan_tgt(shost, chlo, tgtlo, lun);
+
+	return 0;
+}
+
+struct scsi_transport_template *
+fc_attach_transport(struct fc_function_template *ft)
+{
+	int count;
+	struct fc_internal *i = kzalloc(sizeof(struct fc_internal),
+					GFP_KERNEL);
+
+	if (unlikely(!i))
+		return NULL;
+
+	i->t.target_attrs.ac.attrs = &i->starget_attrs[0];
+	i->t.target_attrs.ac.class = &fc_transport_class.class;
+	i->t.target_attrs.ac.match = fc_target_match;
+	i->t.target_size = sizeof(struct fc_starget_attrs);
+	transport_container_register(&i->t.target_attrs);
+
+	i->t.host_attrs.ac.attrs = &i->host_attrs[0];
+	i->t.host_attrs.ac.class = &fc_host_class.class;
+	i->t.host_attrs.ac.match = fc_host_match;
+	i->t.host_size = sizeof(struct fc_host_attrs);
+	if (ft->get_fc_host_stats)
+		i->t.host_attrs.statistics = &fc_statistics_group;
+	transport_container_register(&i->t.host_attrs);
+
+	i->rport_attr_cont.ac.attrs = &i->rport_attrs[0];
+	i->rport_attr_cont.ac.class = &fc_rport_class.class;
+	i->rport_attr_cont.ac.match = fc_rport_match;
+	transport_container_register(&i->rport_attr_cont);
+
+	i->vport_attr_cont.ac.attrs = &i->vport_attrs[0];
+	i->vport_attr_cont.ac.class = &fc_vport_class.class;
+	i->vport_attr_cont.ac.match = fc_vport_match;
+	transport_container_register(&i->vport_attr_cont);
+
+	i->f = ft;
+
+	/* Transport uses the shost workq for scsi scanning */
+	i->t.create_work_queue = 1;
+
+	i->t.user_scan = fc_user_scan;
+
+	/*
+	 * Setup SCSI Target Attributes.
+	 */
+	count = 0;
+	SETUP_STARGET_ATTRIBUTE_RD(node_name);
+	SETUP_STARGET_ATTRIBUTE_RD(port_name);
+	SETUP_STARGET_ATTRIBUTE_RD(port_id);
+
+	BUG_ON(count > FC_STARGET_NUM_ATTRS);
+
+	i->starget_attrs[count] = NULL;
+
+
+	/*
+	 * Setup SCSI Host Attributes.
+	 */
+	count=0;
+	SETUP_HOST_ATTRIBUTE_RD(node_name);
+	SETUP_HOST_ATTRIBUTE_RD(port_name);
+	SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
+	SETUP_HOST_ATTRIBUTE_RD(supported_classes);
+	SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
+	SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
+	SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
+	if (ft->vport_create) {
+		SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
+		SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
+	}
+	SETUP_HOST_ATTRIBUTE_RD(serial_number);
+	SETUP_HOST_ATTRIBUTE_RD(manufacturer);
+	SETUP_HOST_ATTRIBUTE_RD(model);
+	SETUP_HOST_ATTRIBUTE_RD(model_description);
+	SETUP_HOST_ATTRIBUTE_RD(hardware_version);
+	SETUP_HOST_ATTRIBUTE_RD(driver_version);
+	SETUP_HOST_ATTRIBUTE_RD(firmware_version);
+	SETUP_HOST_ATTRIBUTE_RD(optionrom_version);
+
+	SETUP_HOST_ATTRIBUTE_RD(port_id);
+	SETUP_HOST_ATTRIBUTE_RD(port_type);
+	SETUP_HOST_ATTRIBUTE_RD(port_state);
+	SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
+	SETUP_HOST_ATTRIBUTE_RD(speed);
+	SETUP_HOST_ATTRIBUTE_RD(fabric_name);
+	SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
+	SETUP_HOST_ATTRIBUTE_RW(system_hostname);
+
+	/* Transport-managed attributes */
+	SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
+	SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
+	if (ft->issue_fc_host_lip)
+		SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
+	if (ft->vport_create)
+		SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
+	if (ft->vport_delete)
+		SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
+
+	BUG_ON(count > FC_HOST_NUM_ATTRS);
+
+	i->host_attrs[count] = NULL;
+
+	/*
+	 * Setup Remote Port Attributes.
+	 */
+	count=0;
+	SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
+	SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
+	SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
+	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
+	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
+	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
+	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
+	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
+	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
+	SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);
+
+	BUG_ON(count > FC_RPORT_NUM_ATTRS);
+
+	i->rport_attrs[count] = NULL;
+
+	/*
+	 * Setup Virtual Port Attributes.
+	 */
+	count=0;
+	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
+	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
+	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
+	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
+	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
+	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
+	SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
+	SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
+	SETUP_VPORT_ATTRIBUTE_WR(vport_disable);
+
+	BUG_ON(count > FC_VPORT_NUM_ATTRS);
+
+	i->vport_attrs[count] = NULL;
+
+	return &i->t;
+}
+EXPORT_SYMBOL(fc_attach_transport);
+
+void fc_release_transport(struct scsi_transport_template *t)
+{
+	struct fc_internal *i = to_fc_internal(t);
+
+	transport_container_unregister(&i->t.target_attrs);
+	transport_container_unregister(&i->t.host_attrs);
+	transport_container_unregister(&i->rport_attr_cont);
+	transport_container_unregister(&i->vport_attr_cont);
+
+	kfree(i);
+}
+EXPORT_SYMBOL(fc_release_transport);
+
+/**
+ * fc_queue_work - Queue work to the fc_host workqueue.
+ * @shost:	Pointer to Scsi_Host bound to fc_host.
+ * @work:	Work to queue for execution.
+ *
+ * Return value:
+ * 	1 - work queued for execution
+ *	0 - work is already queued
+ *	-EINVAL - work queue doesn't exist
+ */
+static int
+fc_queue_work(struct Scsi_Host *shost, struct work_struct *work)
+{
+	if (unlikely(!fc_host_work_q(shost))) {
+		printk(KERN_ERR
+			"ERROR: FC host '%s' attempted to queue work, "
+			"when no workqueue created.\n", shost->hostt->name);
+		dump_stack();
+
+		return -EINVAL;
+	}
+
+	return queue_work(fc_host_work_q(shost), work);
+}
+
+/**
+ * fc_flush_work - Flush a fc_host's workqueue.
+ * @shost:	Pointer to Scsi_Host bound to fc_host.
+ */
+static void
+fc_flush_work(struct Scsi_Host *shost)
+{
+	if (!fc_host_work_q(shost)) {
+		printk(KERN_ERR
+			"ERROR: FC host '%s' attempted to flush work, "
+			"when no workqueue created.\n", shost->hostt->name);
+		dump_stack();
+		return;
+	}
+
+	flush_workqueue(fc_host_work_q(shost));
+}
+
+/**
+ * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue.
+ * @shost:	Pointer to Scsi_Host bound to fc_host.
+ * @work:	Work to queue for execution.
+ * @delay:	jiffies to delay the work queuing
+ *
+ * Return value:
+ * 	1 on success / 0 already queued / < 0 for error
+ */
+static int
+fc_queue_devloss_work(struct Scsi_Host *shost, struct delayed_work *work,
+				unsigned long delay)
+{
+	if (unlikely(!fc_host_devloss_work_q(shost))) {
+		printk(KERN_ERR
+			"ERROR: FC host '%s' attempted to queue work, "
+			"when no workqueue created.\n", shost->hostt->name);
+		dump_stack();
+
+		return -EINVAL;
+	}
+
+	return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay);
+}
+
+/**
+ * fc_flush_devloss - Flush a fc_host's devloss workqueue.
+ * @shost:	Pointer to Scsi_Host bound to fc_host.
+ */
+static void
+fc_flush_devloss(struct Scsi_Host *shost)
+{
+	if (!fc_host_devloss_work_q(shost)) {
+		printk(KERN_ERR
+			"ERROR: FC host '%s' attempted to flush work, "
+			"when no workqueue created.\n", shost->hostt->name);
+		dump_stack();
+		return;
+	}
+
+	flush_workqueue(fc_host_devloss_work_q(shost));
+}
+
+
+/**
+ * fc_remove_host - called to terminate any fc_transport-related elements for a scsi host.
+ * @shost:	Which &Scsi_Host
+ *
+ * This routine is expected to be called immediately preceding the
+ * a driver's call to scsi_remove_host().
+ *
+ * WARNING: A driver utilizing the fc_transport, which fails to call
+ *   this routine prior to scsi_remove_host(), will leave dangling
+ *   objects in /sys/class/fc_remote_ports. Access to any of these
+ *   objects can result in a system crash !!!
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+void
+fc_remove_host(struct Scsi_Host *shost)
+{
+	struct fc_vport *vport = NULL, *next_vport = NULL;
+	struct fc_rport *rport = NULL, *next_rport = NULL;
+	struct workqueue_struct *work_q;
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	/* Remove any vports */
+	list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
+		vport->flags |= FC_VPORT_DELETING;
+		fc_queue_work(shost, &vport->vport_delete_work);
+	}
+
+	/* Remove any remote ports */
+	list_for_each_entry_safe(rport, next_rport,
+			&fc_host->rports, peers) {
+		list_del(&rport->peers);
+		rport->port_state = FC_PORTSTATE_DELETED;
+		fc_queue_work(shost, &rport->rport_delete_work);
+	}
+
+	list_for_each_entry_safe(rport, next_rport,
+			&fc_host->rport_bindings, peers) {
+		list_del(&rport->peers);
+		rport->port_state = FC_PORTSTATE_DELETED;
+		fc_queue_work(shost, &rport->rport_delete_work);
+	}
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	/* flush all scan work items */
+	scsi_flush_work(shost);
+
+	/* flush all stgt delete, and rport delete work items, then kill it  */
+	if (fc_host->work_q) {
+		work_q = fc_host->work_q;
+		fc_host->work_q = NULL;
+		destroy_workqueue(work_q);
+	}
+
+	/* flush all devloss work items, then kill it  */
+	if (fc_host->devloss_work_q) {
+		work_q = fc_host->devloss_work_q;
+		fc_host->devloss_work_q = NULL;
+		destroy_workqueue(work_q);
+	}
+}
+EXPORT_SYMBOL(fc_remove_host);
+
+static void fc_terminate_rport_io(struct fc_rport *rport)
+{
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+
+	/* Involve the LLDD if possible to terminate all io on the rport. */
+	if (i->f->terminate_rport_io)
+		i->f->terminate_rport_io(rport);
+
+	/*
+	 * Must unblock to flush queued IO. scsi-ml will fail incoming reqs.
+	 */
+	scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
+}
+
+/**
+ * fc_starget_delete - called to delete the scsi descendants of an rport
+ * @work:	remote port to be operated on.
+ *
+ * Deletes target and all sdevs.
+ */
+static void
+fc_starget_delete(struct work_struct *work)
+{
+	struct fc_rport *rport =
+		container_of(work, struct fc_rport, stgt_delete_work);
+
+	fc_terminate_rport_io(rport);
+	scsi_remove_target(&rport->dev);
+}
+
+
+/**
+ * fc_rport_final_delete - finish rport termination and delete it.
+ * @work:	remote port to be deleted.
+ */
+static void
+fc_rport_final_delete(struct work_struct *work)
+{
+	struct fc_rport *rport =
+		container_of(work, struct fc_rport, rport_delete_work);
+	struct device *dev = &rport->dev;
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	unsigned long flags;
+	int do_callback = 0;
+
+	fc_terminate_rport_io(rport);
+
+	/*
+	 * if a scan is pending, flush the SCSI Host work_q so that
+	 * that we can reclaim the rport scan work element.
+	 */
+	if (rport->flags & FC_RPORT_SCAN_PENDING)
+		scsi_flush_work(shost);
+
+	/*
+	 * Cancel any outstanding timers. These should really exist
+	 * only when rmmod'ing the LLDD and we're asking for
+	 * immediate termination of the rports
+	 */
+	spin_lock_irqsave(shost->host_lock, flags);
+	if (rport->flags & FC_RPORT_DEVLOSS_PENDING) {
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		if (!cancel_delayed_work(&rport->fail_io_work))
+			fc_flush_devloss(shost);
+		if (!cancel_delayed_work(&rport->dev_loss_work))
+			fc_flush_devloss(shost);
+		cancel_work_sync(&rport->scan_work);
+		spin_lock_irqsave(shost->host_lock, flags);
+		rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+	}
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	/* Delete SCSI target and sdevs */
+	if (rport->scsi_target_id != -1)
+		fc_starget_delete(&rport->stgt_delete_work);
+
+	/*
+	 * Notify the driver that the rport is now dead. The LLDD will
+	 * also guarantee that any communication to the rport is terminated
+	 *
+	 * Avoid this call if we already called it when we preserved the
+	 * rport for the binding.
+	 */
+	spin_lock_irqsave(shost->host_lock, flags);
+	if (!(rport->flags & FC_RPORT_DEVLOSS_CALLBK_DONE) &&
+	    (i->f->dev_loss_tmo_callbk)) {
+		rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
+		do_callback = 1;
+	}
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	if (do_callback)
+		i->f->dev_loss_tmo_callbk(rport);
+
+	fc_bsg_remove(rport->rqst_q);
+
+	transport_remove_device(dev);
+	device_del(dev);
+	transport_destroy_device(dev);
+	scsi_host_put(shost);			/* for fc_host->rport list */
+	put_device(dev);			/* for self-reference */
+}
+
+
+/**
+ * fc_remote_port_create - allocates and creates a remote FC port.
+ * @shost:	scsi host the remote port is connected to.
+ * @channel:	Channel on shost port connected to.
+ * @ids:	The world wide names, fc address, and FC4 port
+ *		roles for the remote port.
+ *
+ * Allocates and creates the remoter port structure, including the
+ * class and sysfs creation.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+static struct fc_rport *
+fc_remote_port_create(struct Scsi_Host *shost, int channel,
+		      struct fc_rport_identifiers  *ids)
+{
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	struct fc_internal *fci = to_fc_internal(shost->transportt);
+	struct fc_rport *rport;
+	struct device *dev;
+	unsigned long flags;
+	int error;
+	size_t size;
+
+	size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size);
+	rport = kzalloc(size, GFP_KERNEL);
+	if (unlikely(!rport)) {
+		printk(KERN_ERR "%s: allocation failure\n", __func__);
+		return NULL;
+	}
+
+	rport->maxframe_size = -1;
+	rport->supported_classes = FC_COS_UNSPECIFIED;
+	rport->dev_loss_tmo = fc_host->dev_loss_tmo;
+	memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name));
+	memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name));
+	rport->port_id = ids->port_id;
+	rport->roles = ids->roles;
+	rport->port_state = FC_PORTSTATE_ONLINE;
+	if (fci->f->dd_fcrport_size)
+		rport->dd_data = &rport[1];
+	rport->channel = channel;
+	rport->fast_io_fail_tmo = -1;
+
+	INIT_DELAYED_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport);
+	INIT_DELAYED_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io);
+	INIT_WORK(&rport->scan_work, fc_scsi_scan_rport);
+	INIT_WORK(&rport->stgt_delete_work, fc_starget_delete);
+	INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete);
+
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	rport->number = fc_host->next_rport_number++;
+	if ((rport->roles & FC_PORT_ROLE_FCP_TARGET) ||
+	    (rport->roles & FC_PORT_ROLE_FCP_DUMMY_INITIATOR))
+		rport->scsi_target_id = fc_host->next_target_id++;
+	else
+		rport->scsi_target_id = -1;
+	list_add_tail(&rport->peers, &fc_host->rports);
+	scsi_host_get(shost);			/* for fc_host->rport list */
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	dev = &rport->dev;
+	device_initialize(dev);			/* takes self reference */
+	dev->parent = get_device(&shost->shost_gendev); /* parent reference */
+	dev->release = fc_rport_dev_release;
+	dev_set_name(dev, "rport-%d:%d-%d",
+		     shost->host_no, channel, rport->number);
+	transport_setup_device(dev);
+
+	error = device_add(dev);
+	if (error) {
+		printk(KERN_ERR "FC Remote Port device_add failed\n");
+		goto delete_rport;
+	}
+	transport_add_device(dev);
+	transport_configure_device(dev);
+
+	fc_bsg_rportadd(shost, rport);
+	/* ignore any bsg add error - we just can't do sgio */
+
+	if (rport->roles & FC_PORT_ROLE_FCP_TARGET) {
+		/* initiate a scan of the target */
+		rport->flags |= FC_RPORT_SCAN_PENDING;
+		scsi_queue_work(shost, &rport->scan_work);
+	}
+
+	return rport;
+
+delete_rport:
+	transport_destroy_device(dev);
+	spin_lock_irqsave(shost->host_lock, flags);
+	list_del(&rport->peers);
+	scsi_host_put(shost);			/* for fc_host->rport list */
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	put_device(dev->parent);
+	kfree(rport);
+	return NULL;
+}
+
+/**
+ * fc_remote_port_add - notify fc transport of the existence of a remote FC port.
+ * @shost:	scsi host the remote port is connected to.
+ * @channel:	Channel on shost port connected to.
+ * @ids:	The world wide names, fc address, and FC4 port
+ *		roles for the remote port.
+ *
+ * The LLDD calls this routine to notify the transport of the existence
+ * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn)
+ * of the port, it's FC address (port_id), and the FC4 roles that are
+ * active for the port.
+ *
+ * For ports that are FCP targets (aka scsi targets), the FC transport
+ * maintains consistent target id bindings on behalf of the LLDD.
+ * A consistent target id binding is an assignment of a target id to
+ * a remote port identifier, which persists while the scsi host is
+ * attached. The remote port can disappear, then later reappear, and
+ * it's target id assignment remains the same. This allows for shifts
+ * in FC addressing (if binding by wwpn or wwnn) with no apparent
+ * changes to the scsi subsystem which is based on scsi host number and
+ * target id values.  Bindings are only valid during the attachment of
+ * the scsi host. If the host detaches, then later re-attaches, target
+ * id bindings may change.
+ *
+ * This routine is responsible for returning a remote port structure.
+ * The routine will search the list of remote ports it maintains
+ * internally on behalf of consistent target id mappings. If found, the
+ * remote port structure will be reused. Otherwise, a new remote port
+ * structure will be allocated.
+ *
+ * Whenever a remote port is allocated, a new fc_remote_port class
+ * device is created.
+ *
+ * Should not be called from interrupt context.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+struct fc_rport *
+fc_remote_port_add(struct Scsi_Host *shost, int channel,
+	struct fc_rport_identifiers  *ids)
+{
+	struct fc_internal *fci = to_fc_internal(shost->transportt);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	struct fc_rport *rport;
+	unsigned long flags;
+	int match = 0;
+
+	/* ensure any stgt delete functions are done */
+	fc_flush_work(shost);
+
+	/*
+	 * Search the list of "active" rports, for an rport that has been
+	 * deleted, but we've held off the real delete while the target
+	 * is in a "blocked" state.
+	 */
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	list_for_each_entry(rport, &fc_host->rports, peers) {
+
+		if ((rport->port_state == FC_PORTSTATE_BLOCKED ||
+		     rport->port_state == FC_PORTSTATE_NOTPRESENT) &&
+			(rport->channel == channel)) {
+
+			switch (fc_host->tgtid_bind_type) {
+			case FC_TGTID_BIND_BY_WWPN:
+			case FC_TGTID_BIND_NONE:
+				if (rport->port_name == ids->port_name)
+					match = 1;
+				break;
+			case FC_TGTID_BIND_BY_WWNN:
+				if (rport->node_name == ids->node_name)
+					match = 1;
+				break;
+			case FC_TGTID_BIND_BY_ID:
+				if (rport->port_id == ids->port_id)
+					match = 1;
+				break;
+			}
+
+			if (match) {
+
+				memcpy(&rport->node_name, &ids->node_name,
+					sizeof(rport->node_name));
+				memcpy(&rport->port_name, &ids->port_name,
+					sizeof(rport->port_name));
+				rport->port_id = ids->port_id;
+
+				rport->port_state = FC_PORTSTATE_ONLINE;
+				rport->roles = ids->roles;
+
+				spin_unlock_irqrestore(shost->host_lock, flags);
+
+				if (fci->f->dd_fcrport_size)
+					memset(rport->dd_data, 0,
+						fci->f->dd_fcrport_size);
+
+				/*
+				 * If we were not a target, cancel the
+				 * io terminate and rport timers, and
+				 * we're done.
+				 *
+				 * If we were a target, but our new role
+				 * doesn't indicate a target, leave the
+				 * timers running expecting the role to
+				 * change as the target fully logs in. If
+				 * it doesn't, the target will be torn down.
+				 *
+				 * If we were a target, and our role shows
+				 * we're still a target, cancel the timers
+				 * and kick off a scan.
+				 */
+
+				/* was a target, not in roles */
+				if ((rport->scsi_target_id != -1) &&
+				    (!(ids->roles & FC_PORT_ROLE_FCP_TARGET)))
+					return rport;
+
+				/*
+				 * Stop the fail io and dev_loss timers.
+				 * If they flush, the port_state will
+				 * be checked and will NOOP the function.
+				 */
+				if (!cancel_delayed_work(&rport->fail_io_work))
+					fc_flush_devloss(shost);
+				if (!cancel_delayed_work(&rport->dev_loss_work))
+					fc_flush_devloss(shost);
+
+				spin_lock_irqsave(shost->host_lock, flags);
+
+				rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
+						  FC_RPORT_DEVLOSS_PENDING |
+						  FC_RPORT_DEVLOSS_CALLBK_DONE);
+
+				spin_unlock_irqrestore(shost->host_lock, flags);
+
+				/* if target, initiate a scan */
+				if (rport->scsi_target_id != -1) {
+					scsi_target_unblock(&rport->dev,
+							    SDEV_RUNNING);
+					spin_lock_irqsave(shost->host_lock,
+							  flags);
+					rport->flags |= FC_RPORT_SCAN_PENDING;
+					scsi_queue_work(shost,
+							&rport->scan_work);
+					spin_unlock_irqrestore(shost->host_lock,
+							flags);
+				}
+
+				fc_bsg_goose_queue(rport);
+
+				return rport;
+			}
+		}
+	}
+
+	/*
+	 * Search the bindings array
+	 * Note: if never a FCP target, you won't be on this list
+	 */
+	if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) {
+
+		/* search for a matching consistent binding */
+
+		list_for_each_entry(rport, &fc_host->rport_bindings,
+					peers) {
+			if (rport->channel != channel)
+				continue;
+
+			switch (fc_host->tgtid_bind_type) {
+			case FC_TGTID_BIND_BY_WWPN:
+				if (rport->port_name == ids->port_name)
+					match = 1;
+				break;
+			case FC_TGTID_BIND_BY_WWNN:
+				if (rport->node_name == ids->node_name)
+					match = 1;
+				break;
+			case FC_TGTID_BIND_BY_ID:
+				if (rport->port_id == ids->port_id)
+					match = 1;
+				break;
+			case FC_TGTID_BIND_NONE: /* to keep compiler happy */
+				break;
+			}
+
+			if (match) {
+				list_move_tail(&rport->peers, &fc_host->rports);
+				break;
+			}
+		}
+
+		if (match) {
+			memcpy(&rport->node_name, &ids->node_name,
+				sizeof(rport->node_name));
+			memcpy(&rport->port_name, &ids->port_name,
+				sizeof(rport->port_name));
+			rport->port_id = ids->port_id;
+			rport->port_state = FC_PORTSTATE_ONLINE;
+			rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
+
+			if (fci->f->dd_fcrport_size)
+				memset(rport->dd_data, 0,
+						fci->f->dd_fcrport_size);
+			spin_unlock_irqrestore(shost->host_lock, flags);
+
+			fc_remote_port_rolechg(rport, ids->roles);
+			return rport;
+		}
+	}
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	/* No consistent binding found - create new remote port entry */
+	rport = fc_remote_port_create(shost, channel, ids);
+
+	return rport;
+}
+EXPORT_SYMBOL(fc_remote_port_add);
+
+
+/**
+ * fc_remote_port_delete - notifies the fc transport that a remote port is no longer in existence.
+ * @rport:	The remote port that no longer exists
+ *
+ * The LLDD calls this routine to notify the transport that a remote
+ * port is no longer part of the topology. Note: Although a port
+ * may no longer be part of the topology, it may persist in the remote
+ * ports displayed by the fc_host. We do this under 2 conditions:
+ *
+ * 1) If the port was a scsi target, we delay its deletion by "blocking" it.
+ *    This allows the port to temporarily disappear, then reappear without
+ *    disrupting the SCSI device tree attached to it. During the "blocked"
+ *    period the port will still exist.
+ *
+ * 2) If the port was a scsi target and disappears for longer than we
+ *    expect, we'll delete the port and the tear down the SCSI device tree
+ *    attached to it. However, we want to semi-persist the target id assigned
+ *    to that port if it eventually does exist. The port structure will
+ *    remain (although with minimal information) so that the target id
+ *    bindings also remain.
+ *
+ * If the remote port is not an FCP Target, it will be fully torn down
+ * and deallocated, including the fc_remote_port class device.
+ *
+ * If the remote port is an FCP Target, the port will be placed in a
+ * temporary blocked state. From the LLDD's perspective, the rport no
+ * longer exists. From the SCSI midlayer's perspective, the SCSI target
+ * exists, but all sdevs on it are blocked from further I/O. The following
+ * is then expected.
+ *
+ *   If the remote port does not return (signaled by a LLDD call to
+ *   fc_remote_port_add()) within the dev_loss_tmo timeout, then the
+ *   scsi target is removed - killing all outstanding i/o and removing the
+ *   scsi devices attached to it. The port structure will be marked Not
+ *   Present and be partially cleared, leaving only enough information to
+ *   recognize the remote port relative to the scsi target id binding if
+ *   it later appears.  The port will remain as long as there is a valid
+ *   binding (e.g. until the user changes the binding type or unloads the
+ *   scsi host with the binding).
+ *
+ *   If the remote port returns within the dev_loss_tmo value (and matches
+ *   according to the target id binding type), the port structure will be
+ *   reused. If it is no longer a SCSI target, the target will be torn
+ *   down. If it continues to be a SCSI target, then the target will be
+ *   unblocked (allowing i/o to be resumed), and a scan will be activated
+ *   to ensure that all luns are detected.
+ *
+ * Called from normal process context only - cannot be called from interrupt.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+void
+fc_remote_port_delete(struct fc_rport  *rport)
+{
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	unsigned long timeout = rport->dev_loss_tmo;
+	unsigned long flags;
+
+	/*
+	 * No need to flush the fc_host work_q's, as all adds are synchronous.
+	 *
+	 * We do need to reclaim the rport scan work element, so eventually
+	 * (in fc_rport_final_delete()) we'll flush the scsi host work_q if
+	 * there's still a scan pending.
+	 */
+
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	if (rport->port_state != FC_PORTSTATE_ONLINE) {
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		return;
+	}
+
+	/*
+	 * In the past, we if this was not an FCP-Target, we would
+	 * unconditionally just jump to deleting the rport.
+	 * However, rports can be used as node containers by the LLDD,
+	 * and its not appropriate to just terminate the rport at the
+	 * first sign of a loss in connectivity. The LLDD may want to
+	 * send ELS traffic to re-validate the login. If the rport is
+	 * immediately deleted, it makes it inappropriate for a node
+	 * container.
+	 * So... we now unconditionally wait dev_loss_tmo before
+	 * destroying an rport.
+	 */
+
+	rport->port_state = FC_PORTSTATE_BLOCKED;
+
+	rport->flags |= FC_RPORT_DEVLOSS_PENDING;
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	scsi_target_block(&rport->dev);
+
+	/* see if we need to kill io faster than waiting for device loss */
+	if ((rport->fast_io_fail_tmo != -1) &&
+	    (rport->fast_io_fail_tmo < timeout))
+		fc_queue_devloss_work(shost, &rport->fail_io_work,
+					rport->fast_io_fail_tmo * HZ);
+
+	/* cap the length the devices can be blocked until they are deleted */
+	fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ);
+}
+EXPORT_SYMBOL(fc_remote_port_delete);
+
+/**
+ * fc_remote_port_rolechg - notifies the fc transport that the roles on a remote may have changed.
+ * @rport:	The remote port that changed.
+ * @roles:      New roles for this port.
+ *
+ * Description: The LLDD calls this routine to notify the transport that the
+ * roles on a remote port may have changed. The largest effect of this is
+ * if a port now becomes a FCP Target, it must be allocated a
+ * scsi target id.  If the port is no longer a FCP target, any
+ * scsi target id value assigned to it will persist in case the
+ * role changes back to include FCP Target. No changes in the scsi
+ * midlayer will be invoked if the role changes (in the expectation
+ * that the role will be resumed. If it doesn't normal error processing
+ * will take place).
+ *
+ * Should not be called from interrupt context.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+void
+fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles)
+{
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	unsigned long flags;
+	int create = 0;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	if (roles & FC_PORT_ROLE_FCP_TARGET) {
+		if (rport->scsi_target_id == -1) {
+			rport->scsi_target_id = fc_host->next_target_id++;
+			create = 1;
+		} else if (!(rport->roles & FC_PORT_ROLE_FCP_TARGET))
+			create = 1;
+	}
+
+	rport->roles = roles;
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	if (create) {
+		/*
+		 * There may have been a delete timer running on the
+		 * port. Ensure that it is cancelled as we now know
+		 * the port is an FCP Target.
+		 * Note: we know the rport exists and is in an online
+		 *  state as the LLDD would not have had an rport
+		 *  reference to pass us.
+		 *
+		 * Take no action on the del_timer failure as the state
+		 * machine state change will validate the
+		 * transaction.
+		 */
+		if (!cancel_delayed_work(&rport->fail_io_work))
+			fc_flush_devloss(shost);
+		if (!cancel_delayed_work(&rport->dev_loss_work))
+			fc_flush_devloss(shost);
+
+		spin_lock_irqsave(shost->host_lock, flags);
+		rport->flags &= ~(FC_RPORT_FAST_FAIL_TIMEDOUT |
+				  FC_RPORT_DEVLOSS_PENDING |
+				  FC_RPORT_DEVLOSS_CALLBK_DONE);
+		spin_unlock_irqrestore(shost->host_lock, flags);
+
+		/* ensure any stgt delete functions are done */
+		fc_flush_work(shost);
+
+		scsi_target_unblock(&rport->dev, SDEV_RUNNING);
+		/* initiate a scan of the target */
+		spin_lock_irqsave(shost->host_lock, flags);
+		rport->flags |= FC_RPORT_SCAN_PENDING;
+		scsi_queue_work(shost, &rport->scan_work);
+		spin_unlock_irqrestore(shost->host_lock, flags);
+	}
+}
+EXPORT_SYMBOL(fc_remote_port_rolechg);
+
+/**
+ * fc_timeout_deleted_rport - Timeout handler for a deleted remote port.
+ * @work:	rport target that failed to reappear in the allotted time.
+ *
+ * Description: An attempt to delete a remote port blocks, and if it fails
+ *              to return in the allotted time this gets called.
+ */
+static void
+fc_timeout_deleted_rport(struct work_struct *work)
+{
+	struct fc_rport *rport =
+		container_of(work, struct fc_rport, dev_loss_work.work);
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	unsigned long flags;
+	int do_callback = 0;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	rport->flags &= ~FC_RPORT_DEVLOSS_PENDING;
+
+	/*
+	 * If the port is ONLINE, then it came back. If it was a SCSI
+	 * target, validate it still is. If not, tear down the
+	 * scsi_target on it.
+	 */
+	if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+	    (rport->scsi_target_id != -1) &&
+	    !(rport->roles & FC_PORT_ROLE_FCP_TARGET)) {
+		dev_printk(KERN_ERR, &rport->dev,
+			"blocked FC remote port time out: no longer"
+			" a FCP target, removing starget\n");
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		scsi_target_unblock(&rport->dev, SDEV_TRANSPORT_OFFLINE);
+		fc_queue_work(shost, &rport->stgt_delete_work);
+		return;
+	}
+
+	/* NOOP state - we're flushing workq's */
+	if (rport->port_state != FC_PORTSTATE_BLOCKED) {
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		dev_printk(KERN_ERR, &rport->dev,
+			"blocked FC remote port time out: leaving"
+			" rport%s alone\n",
+			(rport->scsi_target_id != -1) ?  " and starget" : "");
+		return;
+	}
+
+	if ((fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) ||
+	    (rport->scsi_target_id == -1)) {
+		list_del(&rport->peers);
+		rport->port_state = FC_PORTSTATE_DELETED;
+		dev_printk(KERN_ERR, &rport->dev,
+			"blocked FC remote port time out: removing"
+			" rport%s\n",
+			(rport->scsi_target_id != -1) ?  " and starget" : "");
+		fc_queue_work(shost, &rport->rport_delete_work);
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		return;
+	}
+
+	dev_printk(KERN_ERR, &rport->dev,
+		"blocked FC remote port time out: removing target and "
+		"saving binding\n");
+
+	list_move_tail(&rport->peers, &fc_host->rport_bindings);
+
+	/*
+	 * Note: We do not remove or clear the hostdata area. This allows
+	 *   host-specific target data to persist along with the
+	 *   scsi_target_id. It's up to the host to manage it's hostdata area.
+	 */
+
+	/*
+	 * Reinitialize port attributes that may change if the port comes back.
+	 */
+	rport->maxframe_size = -1;
+	rport->supported_classes = FC_COS_UNSPECIFIED;
+	rport->roles = FC_PORT_ROLE_UNKNOWN;
+	rport->port_state = FC_PORTSTATE_NOTPRESENT;
+	rport->flags &= ~FC_RPORT_FAST_FAIL_TIMEDOUT;
+
+	/*
+	 * Pre-emptively kill I/O rather than waiting for the work queue
+	 * item to teardown the starget. (FCOE libFC folks prefer this
+	 * and to have the rport_port_id still set when it's done).
+	 */
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	fc_terminate_rport_io(rport);
+
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	if (rport->port_state == FC_PORTSTATE_NOTPRESENT) {	/* still missing */
+
+		/* remove the identifiers that aren't used in the consisting binding */
+		switch (fc_host->tgtid_bind_type) {
+		case FC_TGTID_BIND_BY_WWPN:
+			rport->node_name = -1;
+			rport->port_id = -1;
+			break;
+		case FC_TGTID_BIND_BY_WWNN:
+			rport->port_name = -1;
+			rport->port_id = -1;
+			break;
+		case FC_TGTID_BIND_BY_ID:
+			rport->node_name = -1;
+			rport->port_name = -1;
+			break;
+		case FC_TGTID_BIND_NONE:	/* to keep compiler happy */
+			break;
+		}
+
+		/*
+		 * As this only occurs if the remote port (scsi target)
+		 * went away and didn't come back - we'll remove
+		 * all attached scsi devices.
+		 */
+		rport->flags |= FC_RPORT_DEVLOSS_CALLBK_DONE;
+		fc_queue_work(shost, &rport->stgt_delete_work);
+
+		do_callback = 1;
+	}
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	/*
+	 * Notify the driver that the rport is now dead. The LLDD will
+	 * also guarantee that any communication to the rport is terminated
+	 *
+	 * Note: we set the CALLBK_DONE flag above to correspond
+	 */
+	if (do_callback && i->f->dev_loss_tmo_callbk)
+		i->f->dev_loss_tmo_callbk(rport);
+}
+
+
+/**
+ * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a disconnected SCSI target.
+ * @work:	rport to terminate io on.
+ *
+ * Notes: Only requests the failure of the io, not that all are flushed
+ *    prior to returning.
+ */
+static void
+fc_timeout_fail_rport_io(struct work_struct *work)
+{
+	struct fc_rport *rport =
+		container_of(work, struct fc_rport, fail_io_work.work);
+
+	if (rport->port_state != FC_PORTSTATE_BLOCKED)
+		return;
+
+	rport->flags |= FC_RPORT_FAST_FAIL_TIMEDOUT;
+	fc_terminate_rport_io(rport);
+}
+
+/**
+ * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
+ * @work:	remote port to be scanned.
+ */
+static void
+fc_scsi_scan_rport(struct work_struct *work)
+{
+	struct fc_rport *rport =
+		container_of(work, struct fc_rport, scan_work);
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	unsigned long flags;
+
+	if ((rport->port_state == FC_PORTSTATE_ONLINE) &&
+	    (rport->roles & FC_PORT_ROLE_FCP_TARGET) &&
+	    !(i->f->disable_target_scan)) {
+		scsi_scan_target(&rport->dev, rport->channel,
+				 rport->scsi_target_id, SCAN_WILD_CARD,
+				 SCSI_SCAN_RESCAN);
+	}
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	rport->flags &= ~FC_RPORT_SCAN_PENDING;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+}
+
+/**
+ * fc_block_rport() - Block SCSI eh thread for blocked fc_rport.
+ * @rport: Remote port that scsi_eh is trying to recover.
+ *
+ * This routine can be called from a FC LLD scsi_eh callback. It
+ * blocks the scsi_eh thread until the fc_rport leaves the
+ * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
+ * necessary to avoid the scsi_eh failing recovery actions for blocked
+ * rports which would lead to offlined SCSI devices.
+ *
+ * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
+ *	    FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
+ *	    passed back to scsi_eh.
+ */
+int fc_block_rport(struct fc_rport *rport)
+{
+	struct Scsi_Host *shost = rport_to_shost(rport);
+	unsigned long flags;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	while (rport->port_state == FC_PORTSTATE_BLOCKED &&
+	       !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)) {
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		msleep(1000);
+		spin_lock_irqsave(shost->host_lock, flags);
+	}
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT)
+		return FAST_IO_FAIL;
+
+	return 0;
+}
+EXPORT_SYMBOL(fc_block_rport);
+
+/**
+ * fc_block_scsi_eh - Block SCSI eh thread for blocked fc_rport
+ * @cmnd: SCSI command that scsi_eh is trying to recover
+ *
+ * This routine can be called from a FC LLD scsi_eh callback. It
+ * blocks the scsi_eh thread until the fc_rport leaves the
+ * FC_PORTSTATE_BLOCKED, or the fast_io_fail_tmo fires. This is
+ * necessary to avoid the scsi_eh failing recovery actions for blocked
+ * rports which would lead to offlined SCSI devices.
+ *
+ * Returns: 0 if the fc_rport left the state FC_PORTSTATE_BLOCKED.
+ *	    FAST_IO_FAIL if the fast_io_fail_tmo fired, this should be
+ *	    passed back to scsi_eh.
+ */
+int fc_block_scsi_eh(struct scsi_cmnd *cmnd)
+{
+	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
+
+	if (WARN_ON_ONCE(!rport))
+		return FAST_IO_FAIL;
+
+	return fc_block_rport(rport);
+}
+EXPORT_SYMBOL(fc_block_scsi_eh);
+
+/**
+ * fc_vport_setup - allocates and creates a FC virtual port.
+ * @shost:	scsi host the virtual port is connected to.
+ * @channel:	Channel on shost port connected to.
+ * @pdev:	parent device for vport
+ * @ids:	The world wide names, FC4 port roles, etc for
+ *              the virtual port.
+ * @ret_vport:	The pointer to the created vport.
+ *
+ * Allocates and creates the vport structure, calls the parent host
+ * to instantiate the vport, this completes w/ class and sysfs creation.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+static int
+fc_vport_setup(struct Scsi_Host *shost, int channel, struct device *pdev,
+	struct fc_vport_identifiers  *ids, struct fc_vport **ret_vport)
+{
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	struct fc_internal *fci = to_fc_internal(shost->transportt);
+	struct fc_vport *vport;
+	struct device *dev;
+	unsigned long flags;
+	size_t size;
+	int error;
+
+	*ret_vport = NULL;
+
+	if ( ! fci->f->vport_create)
+		return -ENOENT;
+
+	size = (sizeof(struct fc_vport) + fci->f->dd_fcvport_size);
+	vport = kzalloc(size, GFP_KERNEL);
+	if (unlikely(!vport)) {
+		printk(KERN_ERR "%s: allocation failure\n", __func__);
+		return -ENOMEM;
+	}
+
+	vport->vport_state = FC_VPORT_UNKNOWN;
+	vport->vport_last_state = FC_VPORT_UNKNOWN;
+	vport->node_name = ids->node_name;
+	vport->port_name = ids->port_name;
+	vport->roles = ids->roles;
+	vport->vport_type = ids->vport_type;
+	if (fci->f->dd_fcvport_size)
+		vport->dd_data = &vport[1];
+	vport->shost = shost;
+	vport->channel = channel;
+	vport->flags = FC_VPORT_CREATING;
+	INIT_WORK(&vport->vport_delete_work, fc_vport_sched_delete);
+
+	spin_lock_irqsave(shost->host_lock, flags);
+
+	if (fc_host->npiv_vports_inuse >= fc_host->max_npiv_vports) {
+		spin_unlock_irqrestore(shost->host_lock, flags);
+		kfree(vport);
+		return -ENOSPC;
+	}
+	fc_host->npiv_vports_inuse++;
+	vport->number = fc_host->next_vport_number++;
+	list_add_tail(&vport->peers, &fc_host->vports);
+	scsi_host_get(shost);			/* for fc_host->vport list */
+
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	dev = &vport->dev;
+	device_initialize(dev);			/* takes self reference */
+	dev->parent = get_device(pdev);		/* takes parent reference */
+	dev->release = fc_vport_dev_release;
+	dev_set_name(dev, "vport-%d:%d-%d",
+		     shost->host_no, channel, vport->number);
+	transport_setup_device(dev);
+
+	error = device_add(dev);
+	if (error) {
+		printk(KERN_ERR "FC Virtual Port device_add failed\n");
+		goto delete_vport;
+	}
+	transport_add_device(dev);
+	transport_configure_device(dev);
+
+	error = fci->f->vport_create(vport, ids->disable);
+	if (error) {
+		printk(KERN_ERR "FC Virtual Port LLDD Create failed\n");
+		goto delete_vport_all;
+	}
+
+	/*
+	 * if the parent isn't the physical adapter's Scsi_Host, ensure
+	 * the Scsi_Host at least contains a symlink to the vport.
+	 */
+	if (pdev != &shost->shost_gendev) {
+		error = sysfs_create_link(&shost->shost_gendev.kobj,
+				 &dev->kobj, dev_name(dev));
+		if (error)
+			printk(KERN_ERR
+				"%s: Cannot create vport symlinks for "
+				"%s, err=%d\n",
+				__func__, dev_name(dev), error);
+	}
+	spin_lock_irqsave(shost->host_lock, flags);
+	vport->flags &= ~FC_VPORT_CREATING;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	dev_printk(KERN_NOTICE, pdev,
+			"%s created via shost%d channel %d\n", dev_name(dev),
+			shost->host_no, channel);
+
+	*ret_vport = vport;
+
+	return 0;
+
+delete_vport_all:
+	transport_remove_device(dev);
+	device_del(dev);
+delete_vport:
+	transport_destroy_device(dev);
+	spin_lock_irqsave(shost->host_lock, flags);
+	list_del(&vport->peers);
+	scsi_host_put(shost);			/* for fc_host->vport list */
+	fc_host->npiv_vports_inuse--;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	put_device(dev->parent);
+	kfree(vport);
+
+	return error;
+}
+
+/**
+ * fc_vport_create - Admin App or LLDD requests creation of a vport
+ * @shost:	scsi host the virtual port is connected to.
+ * @channel:	channel on shost port connected to.
+ * @ids:	The world wide names, FC4 port roles, etc for
+ *              the virtual port.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+struct fc_vport *
+fc_vport_create(struct Scsi_Host *shost, int channel,
+	struct fc_vport_identifiers *ids)
+{
+	int stat;
+	struct fc_vport *vport;
+
+	stat = fc_vport_setup(shost, channel, &shost->shost_gendev,
+		 ids, &vport);
+	return stat ? NULL : vport;
+}
+EXPORT_SYMBOL(fc_vport_create);
+
+/**
+ * fc_vport_terminate - Admin App or LLDD requests termination of a vport
+ * @vport:	fc_vport to be terminated
+ *
+ * Calls the LLDD vport_delete() function, then deallocates and removes
+ * the vport from the shost and object tree.
+ *
+ * Notes:
+ *	This routine assumes no locks are held on entry.
+ */
+int
+fc_vport_terminate(struct fc_vport *vport)
+{
+	struct Scsi_Host *shost = vport_to_shost(vport);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	struct device *dev = &vport->dev;
+	unsigned long flags;
+	int stat;
+
+	if (i->f->vport_delete)
+		stat = i->f->vport_delete(vport);
+	else
+		stat = -ENOENT;
+
+	spin_lock_irqsave(shost->host_lock, flags);
+	vport->flags &= ~FC_VPORT_DELETING;
+	if (!stat) {
+		vport->flags |= FC_VPORT_DELETED;
+		list_del(&vport->peers);
+		fc_host->npiv_vports_inuse--;
+		scsi_host_put(shost);		/* for fc_host->vport list */
+	}
+	spin_unlock_irqrestore(shost->host_lock, flags);
+
+	if (stat)
+		return stat;
+
+	if (dev->parent != &shost->shost_gendev)
+		sysfs_remove_link(&shost->shost_gendev.kobj, dev_name(dev));
+	transport_remove_device(dev);
+	device_del(dev);
+	transport_destroy_device(dev);
+
+	/*
+	 * Removing our self-reference should mean our
+	 * release function gets called, which will drop the remaining
+	 * parent reference and free the data structure.
+	 */
+	put_device(dev);			/* for self-reference */
+
+	return 0; /* SUCCESS */
+}
+EXPORT_SYMBOL(fc_vport_terminate);
+
+/**
+ * fc_vport_sched_delete - workq-based delete request for a vport
+ * @work:	vport to be deleted.
+ */
+static void
+fc_vport_sched_delete(struct work_struct *work)
+{
+	struct fc_vport *vport =
+		container_of(work, struct fc_vport, vport_delete_work);
+	int stat;
+
+	stat = fc_vport_terminate(vport);
+	if (stat)
+		dev_printk(KERN_ERR, vport->dev.parent,
+			"%s: %s could not be deleted created via "
+			"shost%d channel %d - error %d\n", __func__,
+			dev_name(&vport->dev), vport->shost->host_no,
+			vport->channel, stat);
+}
+
+
+/*
+ * BSG support
+ */
+
+/**
+ * fc_bsg_job_timeout - handler for when a bsg request timesout
+ * @req:	request that timed out
+ */
+static enum blk_eh_timer_return
+fc_bsg_job_timeout(struct request *req)
+{
+	struct bsg_job *job = blk_mq_rq_to_pdu(req);
+	struct Scsi_Host *shost = fc_bsg_to_shost(job);
+	struct fc_rport *rport = fc_bsg_to_rport(job);
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	int err = 0, inflight = 0;
+
+	if (rport && rport->port_state == FC_PORTSTATE_BLOCKED)
+		return BLK_EH_RESET_TIMER;
+
+	inflight = bsg_job_get(job);
+
+	if (inflight && i->f->bsg_timeout) {
+		/* call LLDD to abort the i/o as it has timed out */
+		err = i->f->bsg_timeout(job);
+		if (err == -EAGAIN) {
+			bsg_job_put(job);
+			return BLK_EH_RESET_TIMER;
+		} else if (err)
+			printk(KERN_ERR "ERROR: FC BSG request timeout - LLD "
+				"abort failed with status %d\n", err);
+	}
+
+	/* the blk_end_sync_io() doesn't check the error */
+	if (inflight)
+		__blk_complete_request(req);
+	return BLK_EH_DONE;
+}
+
+/**
+ * fc_bsg_host_dispatch - process fc host bsg requests and dispatch to LLDD
+ * @shost:	scsi host rport attached to
+ * @job:	bsg job to be processed
+ */
+static int fc_bsg_host_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
+{
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	struct fc_bsg_request *bsg_request = job->request;
+	struct fc_bsg_reply *bsg_reply = job->reply;
+	int cmdlen = sizeof(uint32_t);	/* start with length of msgcode */
+	int ret;
+
+	/* check if we really have all the request data needed */
+	if (job->request_len < cmdlen) {
+		ret = -ENOMSG;
+		goto fail_host_msg;
+	}
+
+	/* Validate the host command */
+	switch (bsg_request->msgcode) {
+	case FC_BSG_HST_ADD_RPORT:
+		cmdlen += sizeof(struct fc_bsg_host_add_rport);
+		break;
+
+	case FC_BSG_HST_DEL_RPORT:
+		cmdlen += sizeof(struct fc_bsg_host_del_rport);
+		break;
+
+	case FC_BSG_HST_ELS_NOLOGIN:
+		cmdlen += sizeof(struct fc_bsg_host_els);
+		/* there better be a xmt and rcv payloads */
+		if ((!job->request_payload.payload_len) ||
+		    (!job->reply_payload.payload_len)) {
+			ret = -EINVAL;
+			goto fail_host_msg;
+		}
+		break;
+
+	case FC_BSG_HST_CT:
+		cmdlen += sizeof(struct fc_bsg_host_ct);
+		/* there better be xmt and rcv payloads */
+		if ((!job->request_payload.payload_len) ||
+		    (!job->reply_payload.payload_len)) {
+			ret = -EINVAL;
+			goto fail_host_msg;
+		}
+		break;
+
+	case FC_BSG_HST_VENDOR:
+		cmdlen += sizeof(struct fc_bsg_host_vendor);
+		if ((shost->hostt->vendor_id == 0L) ||
+		    (bsg_request->rqst_data.h_vendor.vendor_id !=
+			shost->hostt->vendor_id)) {
+			ret = -ESRCH;
+			goto fail_host_msg;
+		}
+		break;
+
+	default:
+		ret = -EBADR;
+		goto fail_host_msg;
+	}
+
+	ret = i->f->bsg_request(job);
+	if (!ret)
+		return 0;
+
+fail_host_msg:
+	/* return the errno failure code as the only status */
+	BUG_ON(job->reply_len < sizeof(uint32_t));
+	bsg_reply->reply_payload_rcv_len = 0;
+	bsg_reply->result = ret;
+	job->reply_len = sizeof(uint32_t);
+	bsg_job_done(job, bsg_reply->result,
+		       bsg_reply->reply_payload_rcv_len);
+	return 0;
+}
+
+
+/*
+ * fc_bsg_goose_queue - restart rport queue in case it was stopped
+ * @rport:	rport to be restarted
+ */
+static void
+fc_bsg_goose_queue(struct fc_rport *rport)
+{
+	struct request_queue *q = rport->rqst_q;
+	unsigned long flags;
+
+	if (!q)
+		return;
+
+	spin_lock_irqsave(q->queue_lock, flags);
+	blk_run_queue_async(q);
+	spin_unlock_irqrestore(q->queue_lock, flags);
+}
+
+/**
+ * fc_bsg_rport_dispatch - process rport bsg requests and dispatch to LLDD
+ * @shost:	scsi host rport attached to
+ * @job:	bsg job to be processed
+ */
+static int fc_bsg_rport_dispatch(struct Scsi_Host *shost, struct bsg_job *job)
+{
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	struct fc_bsg_request *bsg_request = job->request;
+	struct fc_bsg_reply *bsg_reply = job->reply;
+	int cmdlen = sizeof(uint32_t);	/* start with length of msgcode */
+	int ret;
+
+	/* check if we really have all the request data needed */
+	if (job->request_len < cmdlen) {
+		ret = -ENOMSG;
+		goto fail_rport_msg;
+	}
+
+	/* Validate the rport command */
+	switch (bsg_request->msgcode) {
+	case FC_BSG_RPT_ELS:
+		cmdlen += sizeof(struct fc_bsg_rport_els);
+		goto check_bidi;
+
+	case FC_BSG_RPT_CT:
+		cmdlen += sizeof(struct fc_bsg_rport_ct);
+check_bidi:
+		/* there better be xmt and rcv payloads */
+		if ((!job->request_payload.payload_len) ||
+		    (!job->reply_payload.payload_len)) {
+			ret = -EINVAL;
+			goto fail_rport_msg;
+		}
+		break;
+	default:
+		ret = -EBADR;
+		goto fail_rport_msg;
+	}
+
+	ret = i->f->bsg_request(job);
+	if (!ret)
+		return 0;
+
+fail_rport_msg:
+	/* return the errno failure code as the only status */
+	BUG_ON(job->reply_len < sizeof(uint32_t));
+	bsg_reply->reply_payload_rcv_len = 0;
+	bsg_reply->result = ret;
+	job->reply_len = sizeof(uint32_t);
+	bsg_job_done(job, bsg_reply->result,
+		       bsg_reply->reply_payload_rcv_len);
+	return 0;
+}
+
+static int fc_bsg_dispatch(struct bsg_job *job)
+{
+	struct Scsi_Host *shost = fc_bsg_to_shost(job);
+
+	if (scsi_is_fc_rport(job->dev))
+		return fc_bsg_rport_dispatch(shost, job);
+	else
+		return fc_bsg_host_dispatch(shost, job);
+}
+
+/**
+ * fc_bsg_hostadd - Create and add the bsg hooks so we can receive requests
+ * @shost:	shost for fc_host
+ * @fc_host:	fc_host adding the structures to
+ */
+static int
+fc_bsg_hostadd(struct Scsi_Host *shost, struct fc_host_attrs *fc_host)
+{
+	struct device *dev = &shost->shost_gendev;
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	struct request_queue *q;
+	char bsg_name[20];
+
+	fc_host->rqst_q = NULL;
+
+	if (!i->f->bsg_request)
+		return -ENOTSUPP;
+
+	snprintf(bsg_name, sizeof(bsg_name),
+		 "fc_host%d", shost->host_no);
+
+	q = bsg_setup_queue(dev, bsg_name, fc_bsg_dispatch, i->f->dd_bsg_size);
+	if (IS_ERR(q)) {
+		dev_err(dev,
+			"fc_host%d: bsg interface failed to initialize - setup queue\n",
+			shost->host_no);
+		return PTR_ERR(q);
+	}
+	__scsi_init_queue(shost, q);
+	blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
+	blk_queue_rq_timeout(q, FC_DEFAULT_BSG_TIMEOUT);
+	fc_host->rqst_q = q;
+	return 0;
+}
+
+static int fc_bsg_rport_prep(struct request_queue *q, struct request *req)
+{
+	struct fc_rport *rport = dev_to_rport(q->queuedata);
+
+	if (rport->port_state == FC_PORTSTATE_BLOCKED &&
+	    !(rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT))
+		return BLKPREP_DEFER;
+
+	if (rport->port_state != FC_PORTSTATE_ONLINE)
+		return BLKPREP_KILL;
+
+	return BLKPREP_OK;
+}
+
+/**
+ * fc_bsg_rportadd - Create and add the bsg hooks so we can receive requests
+ * @shost:	shost that rport is attached to
+ * @rport:	rport that the bsg hooks are being attached to
+ */
+static int
+fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
+{
+	struct device *dev = &rport->dev;
+	struct fc_internal *i = to_fc_internal(shost->transportt);
+	struct request_queue *q;
+
+	rport->rqst_q = NULL;
+
+	if (!i->f->bsg_request)
+		return -ENOTSUPP;
+
+	q = bsg_setup_queue(dev, dev_name(dev), fc_bsg_dispatch,
+			i->f->dd_bsg_size);
+	if (IS_ERR(q)) {
+		dev_err(dev, "failed to setup bsg queue\n");
+		return PTR_ERR(q);
+	}
+	__scsi_init_queue(shost, q);
+	blk_queue_prep_rq(q, fc_bsg_rport_prep);
+	blk_queue_rq_timed_out(q, fc_bsg_job_timeout);
+	blk_queue_rq_timeout(q, BLK_DEFAULT_SG_TIMEOUT);
+	rport->rqst_q = q;
+	return 0;
+}
+
+
+/**
+ * fc_bsg_remove - Deletes the bsg hooks on fchosts/rports
+ * @q:	the request_queue that is to be torn down.
+ *
+ * Notes:
+ *   Before unregistering the queue empty any requests that are blocked
+ *
+ *
+ */
+static void
+fc_bsg_remove(struct request_queue *q)
+{
+	if (q) {
+		bsg_unregister_queue(q);
+		blk_cleanup_queue(q);
+	}
+}
+
+
+/* Original Author:  Martin Hicks */
+MODULE_AUTHOR("James Smart");
+MODULE_DESCRIPTION("FC Transport Attributes");
+MODULE_LICENSE("GPL");
+
+module_init(fc_transport_init);
+module_exit(fc_transport_exit);