Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1665 insertions, 0 deletions

diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
new file mode 100644
index 000000000000..35d1c1e8e345
--- /dev/null
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -0,0 +1,1665 @@
+/* 
+ *  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) 2004-2005   James Smart, Emulex Corporation
+ *    Rewrite for host, target, device, and remote port attributes,
+ *    statistics, and service functions...
+ *
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+#include "scsi_priv.h"
+
+#define FC_PRINTK(x, l, f, a...)        printk(l "scsi(%d:%d:%d:%d): " f, (x)->host->host_no, (x)->channel, (x)->id, (x)->lun , ##a)
+
+/*
+ * Redefine so that we can have same named attributes in the
+ * sdev/starget/host objects.
+ */
+#define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)          \
+struct class_device_attribute class_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 < sizeof(table)/sizeof(table[0]); 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 < sizeof(table)/sizeof(table[0]); 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_enum_name_search(port_type, fc_port_type, fc_port_type_names)
+#define FC_PORTTYPE_MAX_NAMELEN         50
+
+
+/* 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_enum_name_search(port_state, fc_port_state, fc_port_state_names)
+#define FC_PORTSTATE_MAX_NAMELEN        20
+
+
+/* Convert fc_tgtid_binding_type values to ascii string name */
+static 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 < sizeof(table)/sizeof(table[0]); 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 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 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_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_RPORT_ROLE bit values to ascii string name */
+static struct {
+        u32                     value;
+        char                    *name;
+} fc_remote_port_role_names[] = {
+        { FC_RPORT_ROLE_FCP_TARGET,     "FCP Target" },
+        { FC_RPORT_ROLE_FCP_INITIATOR,  "FCP Initiator" },
+        { FC_RPORT_ROLE_IP_PORT,        "IP Port" },
+};
+fc_bitfield_name_search(remote_port_roles, fc_remote_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_blocked_rport(void *data);
+static void fc_scsi_scan_rport(void *data);
+static void fc_rport_terminate(struct fc_rport  *rport);
+
+/*
+ * Attribute counts pre object type...
+ * Increase these values if you add attributes
+ */
+#define FC_STARGET_NUM_ATTRS    3
+#define FC_RPORT_NUM_ATTRS      9
+#define FC_HOST_NUM_ATTRS       15
+
+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 class_device_attribute private_starget_attrs[
+                                                        FC_STARGET_NUM_ATTRS];
+        struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
+
+        struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
+        struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
+
+        struct transport_container rport_attr_cont;
+        struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
+        struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
+};
+
+#define to_fc_internal(tmpl)    container_of(tmpl, struct fc_internal, t)
+
+static int fc_target_setup(struct device *dev)
+{
+        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 device *dev)
+{
+        struct Scsi_Host *shost = dev_to_shost(dev);
+
+        /* 
+         * 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(shost) = -1;
+        fc_host_port_name(shost) = -1;
+        fc_host_supported_classes(shost) = FC_COS_UNSPECIFIED;
+        memset(fc_host_supported_fc4s(shost), 0,
+                sizeof(fc_host_supported_fc4s(shost)));
+        memset(fc_host_symbolic_name(shost), 0,
+                sizeof(fc_host_symbolic_name(shost)));
+        fc_host_supported_speeds(shost) = FC_PORTSPEED_UNKNOWN;
+        fc_host_maxframe_size(shost) = -1;
+        memset(fc_host_serial_number(shost), 0,
+                sizeof(fc_host_serial_number(shost)));
+
+        fc_host_port_id(shost) = -1;
+        fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
+        fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
+        memset(fc_host_active_fc4s(shost), 0,
+                sizeof(fc_host_active_fc4s(shost)));
+        fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
+        fc_host_fabric_name(shost) = -1;
+
+        fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
+
+        INIT_LIST_HEAD(&fc_host_rports(shost));
+        INIT_LIST_HEAD(&fc_host_rport_bindings(shost));
+        fc_host_next_rport_number(shost) = 0;
+        fc_host_next_target_id(shost) = 0;
+
+        return 0;
+}
+
+static DECLARE_TRANSPORT_CLASS(fc_host_class,
+                               "fc_host",
+                               fc_host_setup,
+                               NULL,
+                               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);
+
+/*
+ * 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 = SCSI_DEVICE_BLOCK_MAX_TIMEOUT;
+
+module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, 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.");
+
+
+static __init int fc_transport_init(void)
+{
+        int error = transport_class_register(&fc_host_class);
+        if (error)
+                return error;
+        error = transport_class_register(&fc_rport_class);
+        if (error)
+                return error;
+        return transport_class_register(&fc_transport_class);
+}
+
+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);
+}
+
+/*
+ * FC Remote Port Attribute Management
+ */
+
+#define fc_rport_show_function(field, format_string, sz, cast)          \
+static ssize_t                                                          \
+show_fc_rport_##field (struct class_device *cdev, char *buf)            \
+{                                                                       \
+        struct fc_rport *rport = transport_class_to_rport(cdev);        \
+        struct Scsi_Host *shost = rport_to_shost(rport);                \
+        struct fc_internal *i = to_fc_internal(shost->transportt);      \
+        if (i->f->get_rport_##field)                                    \
+                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 class_device *cdev, const char *buf,      \
+                           size_t count)                                \
+{                                                                       \
+        int val;                                                        \
+        struct fc_rport *rport = transport_class_to_rport(cdev);        \
+        struct Scsi_Host *shost = rport_to_shost(rport);                \
+        struct fc_internal *i = to_fc_internal(shost->transportt);      \
+        val = simple_strtoul(buf, NULL, 0);                             \
+        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_CLASS_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_CLASS_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_CLASS_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 class_device *cdev, char *buf)            \
+{                                                                       \
+        struct fc_rport *rport = transport_class_to_rport(cdev);        \
+        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_CLASS_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_CLASS_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 class_device *cdev, char *buf)            \
+{                                                                       \
+        struct fc_rport *rport = transport_class_to_rport(cdev);        \
+        const char *name;                                               \
+        name = get_fc_##title##_name(rport->title);                     \
+        if (!name)                                                      \
+                return -EINVAL;                                         \
+        return snprintf(buf, maxlen, "%s\n", name);                     \
+}                                                                       \
+static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO,                      \
+                        show_fc_rport_##title, NULL)
+
+
+#define SETUP_RPORT_ATTRIBUTE_RD(field)                                 \
+        i->private_rport_attrs[count] = class_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] = class_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] = class_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++
+
+
+/* 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 class_device *cdev, char *buf)
+{
+        struct fc_rport *rport = transport_class_to_rport(cdev);
+        if (rport->supported_classes == FC_COS_UNSPECIFIED)
+                return snprintf(buf, 20, "unspecified\n");
+        return get_fc_cos_names(rport->supported_classes, buf);
+}
+static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
+                show_fc_rport_supported_classes, NULL);
+
+/* Dynamic Remote Port Attributes */
+
+fc_rport_rw_attr(dev_loss_tmo, "%d\n", 20);
+
+
+/* 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 class_device *cdev, char *buf)
+{
+        struct fc_rport *rport = transport_class_to_rport(cdev);
+
+        /* 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_RPORT_ROLE_UNKNOWN)
+                        return snprintf(buf, 20, "unknown\n");
+                return get_fc_remote_port_roles_names(rport->roles, buf);
+        }
+}
+static FC_CLASS_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);
+
+
+
+/*
+ * FC SCSI Target Attribute Management
+ */
+
+/*
+ * Note: in the target show function we recognize when the remote
+ *  port is in the heirarchy 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 class_device *cdev, char *buf)          \
+{                                                                       \
+        struct scsi_target *starget = transport_class_to_starget(cdev); \
+        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_CLASS_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_CLASS_DEVICE_ATTR(starget, field, S_IRUGO,                    \
+                          show_fc_starget_##field, NULL)
+
+#define SETUP_STARGET_ATTRIBUTE_RD(field)                               \
+        i->private_starget_attrs[count] = class_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] = class_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);
+
+
+/*
+ * Host Attribute Management
+ */
+
+#define fc_host_show_function(field, format_string, sz, cast)           \
+static ssize_t                                                          \
+show_fc_host_##field (struct class_device *cdev, char *buf)             \
+{                                                                       \
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
+        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 class_device *cdev, const char *buf,       \
+                           size_t count)                                \
+{                                                                       \
+        int val;                                                        \
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
+        struct fc_internal *i = to_fc_internal(shost->transportt);      \
+                                                                        \
+        val = simple_strtoul(buf, NULL, 0);                             \
+        i->f->set_host_##field(shost, val);                             \
+        return count;                                                   \
+}
+
+#define fc_host_rd_attr(field, format_string, sz)                       \
+        fc_host_show_function(field, format_string, sz, )               \
+static FC_CLASS_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_CLASS_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_CLASS_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 class_device *cdev, char *buf)             \
+{                                                                       \
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
+        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_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
+
+#define SETUP_HOST_ATTRIBUTE_RD(field)                                  \
+        i->private_host_attrs[count] = class_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_RW(field)                                  \
+        i->private_host_attrs[count] = class_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 class_device *cdev, char *buf)             \
+{                                                                       \
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);       \
+        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_CLASS_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_CLASS_DEVICE_ATTR(host, field, S_IRUGO,                       \
+                          show_fc_host_##field, NULL)
+
+#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)                  \
+        i->private_host_attrs[count] = class_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] = class_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 class_device *cdev, char *buf)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+
+        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_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO,
+                show_fc_host_supported_classes, NULL);
+
+static ssize_t
+show_fc_host_supported_fc4s (struct class_device *cdev, char *buf)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+        return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
+}
+static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
+                show_fc_host_supported_fc4s, NULL);
+
+static ssize_t
+show_fc_host_supported_speeds (struct class_device *cdev, char *buf)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+
+        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_CLASS_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(symbolic_name, "%s\n", (FC_SYMBOLIC_NAME_SIZE +1));
+fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20);
+fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
+
+
+/* Dynamic Host Attributes */
+
+static ssize_t
+show_fc_host_active_fc4s (struct class_device *cdev, char *buf)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+        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_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO,
+                show_fc_host_active_fc4s, NULL);
+
+static ssize_t
+show_fc_host_speed (struct class_device *cdev, char *buf)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+        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_CLASS_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);
+
+
+/* Private Host Attributes */
+
+static ssize_t
+show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+        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);
+}
+
+static ssize_t
+store_fc_private_host_tgtid_bind_type(struct class_device *cdev,
+        const char *buf, size_t count)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+        struct fc_rport *rport, *next_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);
+                list_for_each_entry_safe(rport, next_rport,
+                                &fc_host_rport_bindings(shost), peers)
+                        fc_rport_terminate(rport);
+                spin_unlock_irqrestore(shost->host_lock, flags);
+        }
+
+        fc_host_tgtid_bind_type(shost) = val;
+        return count;
+}
+
+static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR,
+                        show_fc_private_host_tgtid_bind_type,
+                        store_fc_private_host_tgtid_bind_type);
+
+/*
+ * Host Statistics Management
+ */
+
+/* Show a given an attribute in the statistics group */
+static ssize_t
+fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+        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 class_device *cd, char *buf)   \
+{                                                                       \
+        return fc_stat_show(cd, buf,                                    \
+                            offsetof(struct fc_host_statistics, name)); \
+}                                                                       \
+static FC_CLASS_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);
+
+static ssize_t
+fc_reset_statistics(struct class_device *cdev, const char *buf,
+                           size_t count)
+{
+        struct Scsi_Host *shost = transport_class_to_shost(cdev);
+        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_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL,
+                                fc_reset_statistics);
+
+
+static struct attribute *fc_statistics_attrs[] = {
+        &class_device_attr_host_seconds_since_last_reset.attr,
+        &class_device_attr_host_tx_frames.attr,
+        &class_device_attr_host_tx_words.attr,
+        &class_device_attr_host_rx_frames.attr,
+        &class_device_attr_host_rx_words.attr,
+        &class_device_attr_host_lip_count.attr,
+        &class_device_attr_host_nos_count.attr,
+        &class_device_attr_host_error_frames.attr,
+        &class_device_attr_host_dumped_frames.attr,
+        &class_device_attr_host_link_failure_count.attr,
+        &class_device_attr_host_loss_of_sync_count.attr,
+        &class_device_attr_host_loss_of_signal_count.attr,
+        &class_device_attr_host_prim_seq_protocol_err_count.attr,
+        &class_device_attr_host_invalid_tx_word_count.attr,
+        &class_device_attr_host_invalid_crc_count.attr,
+        &class_device_attr_host_fcp_input_requests.attr,
+        &class_device_attr_host_fcp_output_requests.attr,
+        &class_device_attr_host_fcp_control_requests.attr,
+        &class_device_attr_host_fcp_input_megabytes.attr,
+        &class_device_attr_host_fcp_output_megabytes.attr,
+        &class_device_attr_host_reset_statistics.attr,
+        NULL
+};
+
+static struct attribute_group fc_statistics_group = {
+        .name = "statistics",
+        .attrs = fc_statistics_attrs,
+};
+
+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;
+}
+
+struct scsi_transport_template *
+fc_attach_transport(struct fc_function_template *ft)
+{
+        struct fc_internal *i = kmalloc(sizeof(struct fc_internal),
+                                        GFP_KERNEL);
+        int count;
+
+        if (unlikely(!i))
+                return NULL;
+
+        memset(i, 0, sizeof(struct fc_internal));
+
+        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->f = ft;
+
+        /* Transport uses the shost workq for scsi scanning */
+        i->t.create_work_queue = 1;
+        
+        /*
+         * 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(supported_classes);
+        SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
+        SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
+        SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
+        SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
+        SETUP_HOST_ATTRIBUTE_RD(serial_number);
+
+        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);
+
+        /* Transport-managed attributes */
+        SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
+
+        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);
+
+        BUG_ON(count > FC_RPORT_NUM_ATTRS);
+
+        i->rport_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);
+
+        kfree(i);
+}
+EXPORT_SYMBOL(fc_release_transport);
+
+
+/**
+ * fc_remove_host - called to terminate any fc_transport-related elements
+ *                  for a scsi host.
+ * @rport:      remote port to be unblocked.
+ *
+ * This routine is expected to be called immediately preceeding 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_remote_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_rport *rport, *next_rport;
+
+        /* Remove any remote ports */
+        list_for_each_entry_safe(rport, next_rport,
+                        &fc_host_rports(shost), peers)
+                fc_rport_terminate(rport);
+        list_for_each_entry_safe(rport, next_rport,
+                        &fc_host_rport_bindings(shost), peers)
+                fc_rport_terminate(rport);
+}
+EXPORT_SYMBOL(fc_remove_host);
+
+/**
+ * fc_rport_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.
+ **/
+struct fc_rport *
+fc_rport_create(struct Scsi_Host *shost, int channel,
+        struct fc_rport_identifiers  *ids)
+{
+        struct fc_host_attrs *fc_host =
+                        (struct fc_host_attrs *)shost->shost_data;
+        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 = kmalloc(size, GFP_KERNEL);
+        if (unlikely(!rport)) {
+                printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__);
+                return NULL;
+        }
+        memset(rport, 0, size);
+
+        rport->maxframe_size = -1;
+        rport->supported_classes = FC_COS_UNSPECIFIED;
+        rport->dev_loss_tmo = fc_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;
+
+        INIT_WORK(&rport->dev_loss_work, fc_timeout_blocked_rport, rport);
+        INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport);
+
+        spin_lock_irqsave(shost->host_lock, flags);
+
+        rport->number = fc_host->next_rport_number++;
+        if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+                rport->scsi_target_id = fc_host->next_target_id++;
+        else
+                rport->scsi_target_id = -1;
+        list_add_tail(&rport->peers, &fc_host_rports(shost));
+        get_device(&shost->shost_gendev);
+
+        spin_unlock_irqrestore(shost->host_lock, flags);
+
+        dev = &rport->dev;
+        device_initialize(dev);
+        dev->parent = get_device(&shost->shost_gendev);
+        dev->release = fc_rport_dev_release;
+        sprintf(dev->bus_id, "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);
+
+        if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+                /* initiate a scan of the target */
+                scsi_queue_work(shost, &rport->scan_work);
+
+        return rport;
+
+delete_rport:
+        transport_destroy_device(dev);
+        put_device(dev->parent);
+        spin_lock_irqsave(shost->host_lock, flags);
+        list_del(&rport->peers);
+        put_device(&shost->shost_gendev);
+        spin_unlock_irqrestore(shost->host_lock, flags);
+        put_device(dev->parent);
+        kfree(rport);
+        return NULL;
+}
+
+/**
+ * fc_remote_port_add - notifies the 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_rport *rport;
+        unsigned long flags;
+        int match = 0;
+
+        if (likely((ids->roles & FC_RPORT_ROLE_FCP_TARGET) &&
+                (fc_host_tgtid_bind_type(shost) != FC_TGTID_BIND_NONE))) {
+
+                /* search for a matching consistent binding */
+
+                spin_lock_irqsave(shost->host_lock, flags);
+
+                list_for_each_entry(rport, &fc_host_rport_bindings(shost),
+                                        peers) {
+                        if (rport->channel != channel)
+                                continue;
+
+                        switch (fc_host_tgtid_bind_type(shost)) {
+                        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(shost));
+                                break;
+                        }
+                }
+
+                spin_unlock_irqrestore(shost->host_lock, flags);
+
+                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->roles = ids->roles;
+                        rport->port_state = FC_PORTSTATE_ONLINE;
+
+                        if (rport->roles & FC_RPORT_ROLE_FCP_TARGET)
+                                /* initiate a scan of the target */
+                                scsi_queue_work(shost, &rport->scan_work);
+
+                        return rport;
+                }
+        }
+
+        /* No consistent binding found - create new remote port entry */
+        rport = fc_rport_create(shost, channel, ids);
+
+        return rport;
+}
+EXPORT_SYMBOL(fc_remote_port_add);
+
+/*
+ * fc_rport_tgt_remove - Removes the scsi target on the remote port
+ * @rport:      The remote port to be operated on
+ */
+static void
+fc_rport_tgt_remove(struct fc_rport *rport)
+{
+        struct Scsi_Host *shost = rport_to_shost(rport);
+
+        scsi_target_unblock(&rport->dev);
+
+        /* Stop anything on the workq */
+        if (!cancel_delayed_work(&rport->dev_loss_work))
+                flush_scheduled_work();
+        scsi_flush_work(shost);
+
+        scsi_remove_target(&rport->dev);
+}
+
+/*
+ * fc_rport_terminate - this routine tears down and deallocates a remote port.
+ * @rport:      The remote port to be terminated
+ *
+ * Notes:
+ *      This routine assumes no locks are held on entry.
+ */
+static void
+fc_rport_terminate(struct fc_rport  *rport)
+{
+        struct Scsi_Host *shost = rport_to_shost(rport);
+        struct device *dev = &rport->dev;
+        unsigned long flags;
+
+        fc_rport_tgt_remove(rport);
+
+        transport_remove_device(dev);
+        device_del(dev);
+        transport_destroy_device(dev);
+        spin_lock_irqsave(shost->host_lock, flags);
+        list_del(&rport->peers);
+        spin_unlock_irqrestore(shost->host_lock, flags);
+        put_device(&shost->shost_gendev);
+}
+
+/**
+ * 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. This is done so that target id
+ * mappings (managed via the remote port structures), are always visible
+ * as long as the mapping is valid, regardless of port state,
+ *
+ * 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 structure will be
+ * marked as Not Present, but will remain as long as there is a valid
+ * SCSI target id mapping associated with the port structure. Validity
+ * is determined by the binding type. If binding by wwpn, then the port
+ * structure is always valid and will not be deallocated until the host
+ * is removed.  If binding by wwnn, then the port structure is valid
+ * until another port with the same node name is found in the topology.
+ * If binding by port id (fc address), then the port structure is valid
+ * valid until another port with the same address is identified.
+ *
+ * Called from interrupt or normal process context.
+ *
+ * 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 flags;
+
+        /* If no scsi target id mapping or consistent binding type, delete it */
+        if ((rport->scsi_target_id == -1) ||
+            (fc_host_tgtid_bind_type(shost) == FC_TGTID_BIND_NONE)) {
+                fc_rport_terminate(rport);
+                return;
+        }
+
+        fc_rport_tgt_remove(rport);
+
+        spin_lock_irqsave(shost->host_lock, flags);
+        list_move_tail(&rport->peers, &fc_host_rport_bindings(shost));
+        spin_unlock_irqrestore(shost->host_lock, flags);
+
+        /*
+         * 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_RPORT_ROLE_UNKNOWN;
+        rport->port_state = FC_PORTSTATE_NOTPRESENT;
+
+        /* remove the identifiers that aren't used in the consisting binding */
+        switch (fc_host_tgtid_bind_type(shost)) {
+        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;
+        }
+}
+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.
+ *
+ * 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 =
+                        (struct fc_host_attrs *)shost->shost_data;
+        unsigned long flags;
+        int create = 0;
+
+        rport->roles = roles;
+
+        spin_lock_irqsave(shost->host_lock, flags);
+        if ((rport->scsi_target_id == -1) &&
+            (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) {
+                rport->scsi_target_id = fc_host->next_target_id++;
+                create = 1;
+        }
+        spin_unlock_irqrestore(shost->host_lock, flags);
+
+        if (create)
+                /* initiate a scan of the target */
+                scsi_queue_work(shost, &rport->scan_work);
+}
+EXPORT_SYMBOL(fc_remote_port_rolechg);
+
+/**
+ * fc_timeout_blocked_rport - Timeout handler for blocked remote port
+ *                       that fails to return in the alloted time.
+ * @data:       scsi target that failed to reappear in the alloted time.
+ **/
+static void
+fc_timeout_blocked_rport(void  *data)
+{
+        struct fc_rport *rport = (struct fc_rport *)data;
+
+        rport->port_state = FC_PORTSTATE_OFFLINE;
+
+        dev_printk(KERN_ERR, &rport->dev,
+                "blocked FC remote port time out: removing target\n");
+
+        /*
+         * As this only occurs if the remote port (scsi target)
+         * went away and didn't come back - we'll remove
+         * all attached scsi devices.
+         */
+        scsi_target_unblock(&rport->dev);
+        scsi_remove_target(&rport->dev);
+}
+
+/**
+ * fc_remote_port_block - temporarily block any scsi traffic to a remote port.
+ * @rport:      remote port to be blocked.
+ *
+ * scsi lldd's with a FC transport call this routine to temporarily stop
+ * all scsi traffic to a remote port. If the port is not a SCSI target,
+ * no action is taken. If the port is a SCSI target, all attached devices
+ * are placed into a SDEV_BLOCK state and a timer is started. The timer is
+ * represents the maximum amount of time the port may be blocked. If the
+ * timer expires, the port is considered non-existent and the attached
+ * scsi devices will be removed.
+ *
+ * Called from interrupt or normal process context.
+ *
+ * Returns zero if successful or error if not
+ *
+ * Notes:
+ *      This routine assumes no locks are held on entry.
+ *
+ *      The timeout and timer types are extracted from the fc transport 
+ *      attributes from the caller's rport pointer.
+ **/
+int
+fc_remote_port_block(struct fc_rport *rport)
+{
+        int timeout = rport->dev_loss_tmo;
+        struct work_struct *work = &rport->dev_loss_work;
+
+        if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
+                return -EINVAL;
+
+        scsi_target_block(&rport->dev);
+
+        /* cap the length the devices can be blocked */
+        schedule_delayed_work(work, timeout * HZ);
+
+        rport->port_state = FC_PORTSTATE_BLOCKED;
+        return 0;
+}
+EXPORT_SYMBOL(fc_remote_port_block);
+
+/**
+ * fc_remote_port_unblock - restart any blocked scsi traffic to a remote port.
+ * @rport:      remote port to be unblocked.
+ *
+ * scsi lld's with a FC transport call this routine to restart IO to all
+ * devices associated with the caller's scsi target following a fc_target_block
+ * request.  Called from interrupt or normal process context.
+ *
+ * Notes:
+ *      This routine assumes no locks are held on entry.
+ **/
+ void
+fc_remote_port_unblock(struct fc_rport *rport)
+{
+        struct work_struct *work = &rport->dev_loss_work;
+        struct Scsi_Host *shost = rport_to_shost(rport);
+
+        /*
+         * Stop the target timer first. Take no action on the del_timer
+         * failure as the state machine state change will validate the
+         * transaction.
+         */
+        if (!cancel_delayed_work(work))
+                flush_scheduled_work();
+
+        if (rport->port_state == FC_PORTSTATE_OFFLINE)
+                /*
+                 * initiate a scan of the target as the target has
+                 * been torn down.
+                 */
+                scsi_queue_work(shost, &rport->scan_work);
+        else
+                scsi_target_unblock(&rport->dev);
+
+        rport->port_state = FC_PORTSTATE_ONLINE;
+}
+EXPORT_SYMBOL(fc_remote_port_unblock);
+
+/**
+ * fc_scsi_scan_rport - called to perform a scsi scan on a remote port.
+ * @data:       remote port to be scanned.
+ **/
+static void
+fc_scsi_scan_rport(void *data)
+{
+        struct fc_rport *rport = (struct fc_rport *)data;
+
+        scsi_scan_target(&rport->dev, rport->channel, rport->scsi_target_id,
+                        SCAN_WILD_CARD, 1);
+}
+
+
+MODULE_AUTHOR("Martin Hicks");
+MODULE_DESCRIPTION("FC Transport Attributes");
+MODULE_LICENSE("GPL");
+
+module_init(fc_transport_init);
+module_exit(fc_transport_exit);