/*
* 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
*/
#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_ONLINE, "Online" },
{ FC_PORTSTATE_OFFLINE, "Offline" },
{ 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_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
{ FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
{ FC_TGTID_BIND_BY_ID, "fcportid (FC Address)", 8 },
};
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_port_speed 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;
}
static void fc_timeout_blocked_host(void *data);
static void fc_timeout_blocked_tgt(void *data);
#define FC_STARGET_NUM_ATTRS 4 /* increase this if you add attributes */
#define FC_STARGET_OTHER_ATTRS 0 /* increase this if you add "always on"
* attributes */
#define FC_HOST_NUM_ATTRS 15
struct fc_internal {
struct scsi_transport_template t;
struct fc_function_template *f;
/* The actual attributes */
struct class_device_attribute private_starget_attrs[
FC_STARGET_NUM_ATTRS];
/* The array of null terminated pointers to attributes
* needed by scsi_sysfs.c */
struct class_device_attribute *starget_attrs[
FC_STARGET_NUM_ATTRS + FC_STARGET_OTHER_ATTRS + 1];
struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
};
#define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t)
static int fc_add_target(struct device *dev)
{
struct scsi_target *starget = to_scsi_target(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 target.
*/
fc_starget_node_name(starget) = -1;
fc_starget_port_name(starget) = -1;
fc_starget_port_id(starget) = -1;
fc_starget_dev_loss_tmo(starget) = -1;
INIT_WORK(&fc_starget_dev_loss_work(starget),
fc_timeout_blocked_tgt, starget);
return 0;
}
static int fc_remove_target(struct device *dev)
{
struct scsi_target *starget = to_scsi_target(dev);
/* Stop the target timer */
if (cancel_delayed_work(&fc_starget_dev_loss_work(starget)))
flush_scheduled_work();
return 0;
}
static DECLARE_TRANSPORT_CLASS(fc_transport_class,
"fc_transport",
fc_add_target,
fc_remove_target,
NULL);
static int fc_add_host(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_hardware_version(shost), 0,
sizeof(fc_host_hardware_version(shost)));
memset(fc_host_firmware_version(shost), 0,
sizeof(fc_host_firmware_version(shost)));
memset(fc_host_serial_number(shost), 0,
sizeof(fc_host_serial_number(shost)));
memset(fc_host_opt_rom_version(shost), 0,
sizeof(fc_host_opt_rom_version(shost)));
memset(fc_host_driver_version(shost), 0,
sizeof(fc_host_driver_version(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_link_down_tmo(shost) = -1;
fc_host_tgtid_bind_type(shost) = FC_TGTID_BIND_BY_WWPN;
INIT_WORK(&fc_host_link_down_work(shost),
fc_timeout_blocked_host, shost);
return 0;
}
static int fc_remove_host(struct device *dev)
{
struct Scsi_Host *shost = dev_to_shost(dev);
/* Stop the host timer */
if (cancel_delayed_work(&fc_host_link_down_work(shost)))
flush_scheduled_work();
return 0;
}
static DECLARE_TRANSPORT_CLASS(fc_host_class,
"fc_host",
fc_add_host,
fc_remove_host,
NULL);
static __init int fc_transport_init(void)
{
int error = transport_class_register(&fc_host_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_host_class);
}
/*
* Remote Port (Target) Attribute Management
*/
#define fc_starget_show_function(field, format_string, 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); \
if (i->f->get_starget_##field) \
i->f->get_starget_##field(starget); \
return snprintf(buf, 20, format_string, \
cast fc_starget_##field(starget)); \
}
#define fc_starget_store_function(field, format_string) \
static ssize_t \
store_fc_starget_##field(struct class_device *cdev, const char *buf, \
size_t count) \
{ \
int val; \
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); \
\
val = simple_strtoul(buf, NULL, 0); \
i->f->set_starget_##field(starget, val); \
return count; \
}
#define fc_starget_rd_attr(field, format_string) \
fc_starget_show_function(field, format_string, ) \
static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
show_fc_starget_##field, NULL)
#define fc_starget_rd_attr_cast(field, format_string, cast) \
fc_starget_show_function(field, format_string, (cast)) \
static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \
show_fc_starget_##field, NULL)
#define fc_starget_rw_attr(field, format_string) \
fc_starget_show_function(field, format_string, ) \
fc_starget_store_function(field, format_string) \
static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO | S_IWUSR, \
show_fc_starget_##field, \
store_fc_starget_##field)
#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 Tranport Remote Port (Target) Attributes: */
fc_starget_rd_attr_cast(node_name, "0x%llx\n", unsigned long long);
fc_starget_rd_attr_cast(port_name, "0x%llx\n", unsigned long long);
fc_starget_rd_attr(port_id, "0x%06x\n");
fc_starget_rw_attr(dev_loss_tmo, "%d\n");
/*
* 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, format_string) \
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, format_string) \
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(hardware_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(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1));
fc_private_host_rd_attr(opt_rom_version, "%s\n", (FC_VERSION_STRING_SIZE +1));
fc_private_host_rd_attr(driver_version, "%s\n", (FC_VERSION_STRING_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);
fc_host_rw_attr(link_down_tmo, "%d\n", 20);
/* 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);
enum fc_tgtid_binding_type val;
if (get_fc_tgtid_bind_type_match(buf, &val))
return -EINVAL;
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.class
!= &fc_host_class.class)
return 0;
i = to_fc_internal(shost->transportt);
return &i->t.host_attrs == 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.class
!= &fc_host_class.class)
return 0;
i = to_fc_internal(shost->transportt);
return &i->t.target_attrs == 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 = 0;
if (unlikely(!i))
return NULL;
memset(i, 0, sizeof(struct fc_internal));
i->t.target_attrs.attrs = &i->starget_attrs[0];
i->t.target_attrs.class = &fc_transport_class.class;
i->t.target_attrs.match = fc_target_match;
attribute_container_register(&i->t.target_attrs);
i->t.target_size = sizeof(struct fc_starget_attrs);
i->t.host_attrs.attrs = &i->host_attrs[0];
i->t.host_attrs.class = &fc_host_class.class;
i->t.host_attrs.match = fc_host_match;
attribute_container_register(&i->t.host_attrs);
i->t.host_size = sizeof(struct fc_host_attrs);
if (ft->get_fc_host_stats)
i->t.host_statistics = &fc_statistics_group;
i->f = ft;
/*
* setup remote port (target) attributes
*/
SETUP_STARGET_ATTRIBUTE_RD(port_id);
SETUP_STARGET_ATTRIBUTE_RD(port_name);
SETUP_STARGET_ATTRIBUTE_RD(node_name);
SETUP_STARGET_ATTRIBUTE_RW(dev_loss_tmo);
BUG_ON(count > FC_STARGET_NUM_ATTRS);
/* Setup the always-on attributes here */
i->starget_attrs[count] = NULL;
/* setup 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(hardware_version);
SETUP_HOST_ATTRIBUTE_RD(firmware_version);
SETUP_HOST_ATTRIBUTE_RD(serial_number);
SETUP_HOST_ATTRIBUTE_RD(opt_rom_version);
SETUP_HOST_ATTRIBUTE_RD(driver_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_RW(link_down_tmo);
/* Transport-managed attributes */
SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
BUG_ON(count > FC_HOST_NUM_ATTRS);
i->host_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);
attribute_container_unregister(&i->t.target_attrs);
attribute_container_unregister(&i->t.host_attrs);
kfree(i);
}
EXPORT_SYMBOL(fc_release_transport);
/**
* fc_device_block - called by target functions to block a scsi device
* @dev: scsi device
* @data: unused
**/
static void fc_device_block(struct scsi_device *sdev, void *data)
{
scsi_internal_device_block(sdev);
}
/**
* fc_device_unblock - called by target functions to unblock a scsi device
* @dev: scsi device
* @data: unused
**/
static void fc_device_unblock(struct scsi_device *sdev, void *data)
{
scsi_internal_device_unblock(sdev);
}
/**
* fc_timeout_blocked_tgt - Timeout handler for blocked scsi targets
* that fail to recover in the alloted time.
* @data: scsi target that failed to reappear in the alloted time.
**/
static void fc_timeout_blocked_tgt(void *data)
{
struct scsi_target *starget = (struct scsi_target *)data;
dev_printk(KERN_ERR, &starget->dev,
"blocked target time out: target resuming\n");
/*
* set the device going again ... if the scsi lld didn't
* unblock this device, then IO errors will probably
* result if the host still isn't ready.
*/
starget_for_each_device(starget, NULL, fc_device_unblock);
}
/**
* fc_target_block - block a target by temporarily putting all its scsi devices
* into the SDEV_BLOCK state.
* @starget: scsi target managed by this fc scsi lldd.
*
* scsi lldd's with a FC transport call this routine to temporarily stop all
* scsi commands to all devices managed by this scsi target. Called
* from interrupt or normal process context.
*
* Returns zero if successful or error if not
*
* Notes:
* The timeout and timer types are extracted from the fc transport
* attributes from the caller's target pointer. This routine assumes no
* locks are held on entry.
**/
int
fc_target_block(struct scsi_target *starget)
{
int timeout = fc_starget_dev_loss_tmo(starget);
struct work_struct *work = &fc_starget_dev_loss_work(starget);
if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
return -EINVAL;
starget_for_each_device(starget, NULL, fc_device_block);
/* The scsi lld blocks this target for the timeout period only. */
schedule_delayed_work(work, timeout * HZ);
return 0;
}
EXPORT_SYMBOL(fc_target_block);
/**
* fc_target_unblock - unblock a target following a fc_target_block request.
* @starget: scsi target managed by this fc scsi lldd.
*
* 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_target_unblock(struct scsi_target *starget)
{
/*
* 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(&fc_starget_dev_loss_work(starget)))
flush_scheduled_work();
starget_for_each_device(starget, NULL, fc_device_unblock);
}
EXPORT_SYMBOL(fc_target_unblock);
/**
* fc_timeout_blocked_host - Timeout handler for blocked scsi hosts
* that fail to recover in the alloted time.
* @data: scsi host that failed to recover its devices in the alloted
* time.
**/
static void fc_timeout_blocked_host(void *data)
{
struct Scsi_Host *shost = (struct Scsi_Host *)data;
struct scsi_device *sdev;
dev_printk(KERN_ERR, &shost->shost_gendev,
"blocked host time out: host resuming\n");
shost_for_each_device(sdev, shost) {
/*
* set the device going again ... if the scsi lld didn't
* unblock this device, then IO errors will probably
* result if the host still isn't ready.
*/
scsi_internal_device_unblock(sdev);
}
}
/**
* fc_host_block - block all scsi devices managed by the calling host temporarily
* by putting each device in the SDEV_BLOCK state.
* @shost: scsi host pointer that contains all scsi device siblings.
*
* scsi lld's with a FC transport call this routine to temporarily stop all
* scsi commands to all devices managed by this host. Called
* from interrupt or normal process context.
*
* Returns zero if successful or error if not
*
* Notes:
* The timeout and timer types are extracted from the fc transport
* attributes from the caller's host pointer. This routine assumes no
* locks are held on entry.
**/
int
fc_host_block(struct Scsi_Host *shost)
{
struct scsi_device *sdev;
int timeout = fc_host_link_down_tmo(shost);
struct work_struct *work = &fc_host_link_down_work(shost);
if (timeout < 0 || timeout > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
return -EINVAL;
shost_for_each_device(sdev, shost) {
scsi_internal_device_block(sdev);
}
schedule_delayed_work(work, timeout * HZ);
return 0;
}
EXPORT_SYMBOL(fc_host_block);
/**
* fc_host_unblock - unblock all devices managed by this host following a
* fc_host_block request.
* @shost: scsi host containing all scsi device siblings to unblock.
*
* scsi lld's with a FC transport call this routine to restart IO to all scsi
* devices managed by the specified scsi host following an fc_host_block
* request. Called from interrupt or normal process context.
*
* Notes:
* This routine assumes no locks are held on entry.
**/
void
fc_host_unblock(struct Scsi_Host *shost)
{
struct scsi_device *sdev;
/*
* Stop the host timer first. Take no action on the del_timer
* failure as the state machine state change will validate the
* transaction.
*/
if (cancel_delayed_work(&fc_host_link_down_work(shost)))
flush_scheduled_work();
shost_for_each_device(sdev, shost) {
scsi_internal_device_unblock(sdev);
}
}
EXPORT_SYMBOL(fc_host_unblock);
MODULE_AUTHOR("Martin Hicks");
MODULE_DESCRIPTION("FC Transport Attributes");
MODULE_LICENSE("GPL");
module_init(fc_transport_init);
module_exit(fc_transport_exit);
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