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linuxdebug/drivers/s390/scsi/zfcp_sysfs.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* zfcp device driver
*
* sysfs attributes.
*
* Copyright IBM Corp. 2008, 2020
*/
#define KMSG_COMPONENT "zfcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/slab.h>
#include "zfcp_diag.h"
#include "zfcp_ext.h"
#define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
_show, _store)
#define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \
static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
struct device_attribute *at,\
char *buf) \
{ \
struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
\
return sprintf(buf, _format, _value); \
} \
static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
zfcp_sysfs_##_feat##_##_name##_show, NULL);
#define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value) \
static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
struct device_attribute *at,\
char *buf) \
{ \
return sprintf(buf, _format, _value); \
} \
static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
zfcp_sysfs_##_feat##_##_name##_show, NULL);
#define ZFCP_DEFINE_A_ATTR(_name, _format, _value) \
static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
struct device_attribute *at,\
char *buf) \
{ \
struct ccw_device *cdev = to_ccwdev(dev); \
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev); \
int i; \
\
if (!adapter) \
return -ENODEV; \
\
i = sprintf(buf, _format, _value); \
zfcp_ccw_adapter_put(adapter); \
return i; \
} \
static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO, \
zfcp_sysfs_adapter_##_name##_show, NULL);
ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
(unsigned long long) adapter->peer_wwnn);
ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
(unsigned long long) adapter->peer_wwpn);
ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
atomic_read(&port->status));
ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
(atomic_read(&port->status) &
ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
zfcp_unit_sdev_status(unit));
ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
(zfcp_unit_sdev_status(unit) &
ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
(zfcp_unit_sdev_status(unit) &
ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
return sprintf(buf, "1\n");
return sprintf(buf, "0\n");
}
static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
unsigned long val;
if (kstrtoul(buf, 0, &val) || val != 0)
return -EINVAL;
zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
zfcp_erp_wait(port->adapter);
return count;
}
static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
zfcp_sysfs_port_failed_show,
zfcp_sysfs_port_failed_store);
static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
struct scsi_device *sdev;
unsigned int status, failed = 1;
sdev = zfcp_unit_sdev(unit);
if (sdev) {
status = atomic_read(&sdev_to_zfcp(sdev)->status);
failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
scsi_device_put(sdev);
}
return sprintf(buf, "%d\n", failed);
}
static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
unsigned long val;
struct scsi_device *sdev;
if (kstrtoul(buf, 0, &val) || val != 0)
return -EINVAL;
sdev = zfcp_unit_sdev(unit);
if (sdev) {
zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
"syufai2");
zfcp_erp_wait(unit->port->adapter);
} else
zfcp_unit_scsi_scan(unit);
return count;
}
static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
zfcp_sysfs_unit_failed_show,
zfcp_sysfs_unit_failed_store);
static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
int i;
if (!adapter)
return -ENODEV;
if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
i = sprintf(buf, "1\n");
else
i = sprintf(buf, "0\n");
zfcp_ccw_adapter_put(adapter);
return i;
}
static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
unsigned long val;
int retval = 0;
if (!adapter)
return -ENODEV;
if (kstrtoul(buf, 0, &val) || val != 0) {
retval = -EINVAL;
goto out;
}
zfcp_erp_adapter_reset_sync(adapter, "syafai2");
out:
zfcp_ccw_adapter_put(adapter);
return retval ? retval : (ssize_t) count;
}
static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
zfcp_sysfs_adapter_failed_show,
zfcp_sysfs_adapter_failed_store);
static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
int retval = 0;
if (!adapter)
return -ENODEV;
/*
* If `scsi_host` is missing, we can't schedule `scan_work`, as it
* makes use of the corresponding fc_host object. But this state is
* only possible if xconfig/xport data has never completed yet,
* and we couldn't successfully scan for ports anyway.
*/
if (adapter->scsi_host == NULL) {
retval = -ENODEV;
goto out;
}
/*
* Users wish is our command: immediately schedule and flush a
* worker to conduct a synchronous port scan, that is, neither
* a random delay nor a rate limit is applied here.
*/
queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
flush_delayed_work(&adapter->scan_work);
out:
zfcp_ccw_adapter_put(adapter);
return retval ? retval : (ssize_t) count;
}
static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
zfcp_sysfs_port_rescan_store);
DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
{
lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
atomic_set(&port->units, -1);
}
bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
{
lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
return atomic_read(&port->units) == -1;
}
static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
{
struct zfcp_adapter *const adapter = port->adapter;
unsigned long flags;
struct scsi_device *sdev;
bool in_use = true;
mutex_lock(&zfcp_sysfs_port_units_mutex);
if (atomic_read(&port->units) > 0)
goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
__shost_for_each_device(sdev, adapter->scsi_host) {
const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
if (sdev->sdev_state == SDEV_DEL ||
sdev->sdev_state == SDEV_CANCEL)
continue;
if (zsdev->port != port)
continue;
/* alive scsi_device under port of interest */
goto unlock_host_lock;
}
/* port is about to be removed, so no more unit_add or slave_alloc */
zfcp_sysfs_port_set_removing(port);
in_use = false;
unlock_host_lock:
spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
unlock_port_units_mutex:
mutex_unlock(&zfcp_sysfs_port_units_mutex);
return in_use;
}
static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
struct zfcp_port *port;
u64 wwpn;
int retval = -EINVAL;
if (!adapter)
return -ENODEV;
if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
goto out;
port = zfcp_get_port_by_wwpn(adapter, wwpn);
if (!port)
goto out;
else
retval = 0;
if (zfcp_sysfs_port_in_use(port)) {
retval = -EBUSY;
put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
goto out;
}
write_lock_irq(&adapter->port_list_lock);
list_del(&port->list);
write_unlock_irq(&adapter->port_list_lock);
zfcp_erp_port_shutdown(port, 0, "syprs_1");
device_unregister(&port->dev);
put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
out:
zfcp_ccw_adapter_put(adapter);
return retval ? retval : (ssize_t) count;
}
static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
zfcp_sysfs_port_remove_store);
static ssize_t
zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
ssize_t rc;
if (!adapter)
return -ENODEV;
/* ceil(log(2^64 - 1) / log(10)) = 20 */
rc = scnprintf(buf, 20 + 2, "%lu\n", adapter->diagnostics->max_age);
zfcp_ccw_adapter_put(adapter);
return rc;
}
static ssize_t
zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
unsigned long max_age;
ssize_t rc;
if (!adapter)
return -ENODEV;
rc = kstrtoul(buf, 10, &max_age);
if (rc != 0)
goto out;
adapter->diagnostics->max_age = max_age;
rc = count;
out:
zfcp_ccw_adapter_put(adapter);
return rc;
}
static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
zfcp_sysfs_adapter_diag_max_age_show,
zfcp_sysfs_adapter_diag_max_age_store);
static ssize_t zfcp_sysfs_adapter_fc_security_show(
struct device *dev, struct device_attribute *attr, char *buf)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
unsigned int status;
int i;
if (!adapter)
return -ENODEV;
/*
* Adapter status COMMON_OPEN implies xconf data and xport data
* was done. Adapter FC Endpoint Security capability remains
* unchanged in case of COMMON_ERP_FAILED (e.g. due to local link
* down).
*/
status = atomic_read(&adapter->status);
if (0 == (status & ZFCP_STATUS_COMMON_OPEN))
i = sprintf(buf, "unknown\n");
else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
i = sprintf(buf, "unsupported\n");
else {
i = zfcp_fsf_scnprint_fc_security(
buf, PAGE_SIZE - 1, adapter->fc_security_algorithms,
ZFCP_FSF_PRINT_FMT_LIST);
i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
}
zfcp_ccw_adapter_put(adapter);
return i;
}
static ZFCP_DEV_ATTR(adapter, fc_security, S_IRUGO,
zfcp_sysfs_adapter_fc_security_show,
NULL);
static struct attribute *zfcp_adapter_attrs[] = {
&dev_attr_adapter_failed.attr,
&dev_attr_adapter_in_recovery.attr,
&dev_attr_adapter_port_remove.attr,
&dev_attr_adapter_port_rescan.attr,
&dev_attr_adapter_peer_wwnn.attr,
&dev_attr_adapter_peer_wwpn.attr,
&dev_attr_adapter_peer_d_id.attr,
&dev_attr_adapter_card_version.attr,
&dev_attr_adapter_lic_version.attr,
&dev_attr_adapter_status.attr,
&dev_attr_adapter_hardware_version.attr,
&dev_attr_adapter_diag_max_age.attr,
&dev_attr_adapter_fc_security.attr,
NULL
};
static const struct attribute_group zfcp_sysfs_adapter_attr_group = {
.attrs = zfcp_adapter_attrs,
};
static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
u64 fcp_lun;
int retval;
if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
return -EINVAL;
retval = zfcp_unit_add(port, fcp_lun);
if (retval)
return retval;
return count;
}
static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
u64 fcp_lun;
if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
return -EINVAL;
if (zfcp_unit_remove(port, fcp_lun))
return -EINVAL;
return count;
}
static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
static ssize_t zfcp_sysfs_port_fc_security_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
struct zfcp_adapter *adapter = port->adapter;
unsigned int status = atomic_read(&port->status);
int i;
if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
0 == (status & ZFCP_STATUS_PORT_PHYS_OPEN) ||
0 != (status & ZFCP_STATUS_PORT_LINK_TEST) ||
0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
0 != (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
i = sprintf(buf, "unknown\n");
else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
i = sprintf(buf, "unsupported\n");
else {
i = zfcp_fsf_scnprint_fc_security(
buf, PAGE_SIZE - 1, port->connection_info,
ZFCP_FSF_PRINT_FMT_SINGLEITEM);
i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
}
return i;
}
static ZFCP_DEV_ATTR(port, fc_security, S_IRUGO,
zfcp_sysfs_port_fc_security_show,
NULL);
static struct attribute *zfcp_port_attrs[] = {
&dev_attr_unit_add.attr,
&dev_attr_unit_remove.attr,
&dev_attr_port_failed.attr,
&dev_attr_port_in_recovery.attr,
&dev_attr_port_status.attr,
&dev_attr_port_access_denied.attr,
&dev_attr_port_fc_security.attr,
NULL
};
static struct attribute_group zfcp_port_attr_group = {
.attrs = zfcp_port_attrs,
};
const struct attribute_group *zfcp_port_attr_groups[] = {
&zfcp_port_attr_group,
NULL,
};
static struct attribute *zfcp_unit_attrs[] = {
&dev_attr_unit_failed.attr,
&dev_attr_unit_in_recovery.attr,
&dev_attr_unit_status.attr,
&dev_attr_unit_access_denied.attr,
&dev_attr_unit_access_shared.attr,
&dev_attr_unit_access_readonly.attr,
NULL
};
static struct attribute_group zfcp_unit_attr_group = {
.attrs = zfcp_unit_attrs,
};
const struct attribute_group *zfcp_unit_attr_groups[] = {
&zfcp_unit_attr_group,
NULL,
};
#define ZFCP_DEFINE_LATENCY_ATTR(_name) \
static ssize_t \
zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) { \
struct scsi_device *sdev = to_scsi_device(dev); \
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; \
unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
\
spin_lock_bh(&lat->lock); \
fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
fmin = lat->_name.fabric.min * adapter->timer_ticks; \
fmax = lat->_name.fabric.max * adapter->timer_ticks; \
csum = lat->_name.channel.sum * adapter->timer_ticks; \
cmin = lat->_name.channel.min * adapter->timer_ticks; \
cmax = lat->_name.channel.max * adapter->timer_ticks; \
cc = lat->_name.counter; \
spin_unlock_bh(&lat->lock); \
\
do_div(fsum, 1000); \
do_div(fmin, 1000); \
do_div(fmax, 1000); \
do_div(csum, 1000); \
do_div(cmin, 1000); \
do_div(cmax, 1000); \
\
return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
fmin, fmax, fsum, cmin, cmax, csum, cc); \
} \
static ssize_t \
zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct scsi_device *sdev = to_scsi_device(dev); \
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
unsigned long flags; \
\
spin_lock_irqsave(&lat->lock, flags); \
lat->_name.fabric.sum = 0; \
lat->_name.fabric.min = 0xFFFFFFFF; \
lat->_name.fabric.max = 0; \
lat->_name.channel.sum = 0; \
lat->_name.channel.min = 0xFFFFFFFF; \
lat->_name.channel.max = 0; \
lat->_name.counter = 0; \
spin_unlock_irqrestore(&lat->lock, flags); \
\
return (ssize_t) count; \
} \
static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \
zfcp_sysfs_unit_##_name##_latency_show, \
zfcp_sysfs_unit_##_name##_latency_store);
ZFCP_DEFINE_LATENCY_ATTR(read);
ZFCP_DEFINE_LATENCY_ATTR(write);
ZFCP_DEFINE_LATENCY_ATTR(cmd);
#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \
struct device_attribute *attr,\
char *buf) \
{ \
struct scsi_device *sdev = to_scsi_device(dev); \
struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
\
return sprintf(buf, _format, _value); \
} \
static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
(unsigned long long) zfcp_sdev->port->wwpn);
static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
}
static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
(atomic_read(&zfcp_sdev->status) &
ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
return sprintf(buf, "%d\n", failed);
}
static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct scsi_device *sdev = to_scsi_device(dev);
unsigned long val;
if (kstrtoul(buf, 0, &val) || val != 0)
return -EINVAL;
zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
"syufai3");
zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
return count;
}
static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
zfcp_sysfs_scsi_zfcp_failed_show,
zfcp_sysfs_scsi_zfcp_failed_store);
ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
(atomic_read(&zfcp_sdev->status) &
ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
atomic_read(&zfcp_sdev->status));
static struct attribute *zfcp_sdev_attrs[] = {
&dev_attr_fcp_lun.attr,
&dev_attr_wwpn.attr,
&dev_attr_hba_id.attr,
&dev_attr_read_latency.attr,
&dev_attr_write_latency.attr,
&dev_attr_cmd_latency.attr,
&dev_attr_zfcp_access_denied.attr,
&dev_attr_zfcp_failed.attr,
&dev_attr_zfcp_in_recovery.attr,
&dev_attr_zfcp_status.attr,
NULL
};
static const struct attribute_group zfcp_sysfs_sdev_attr_group = {
.attrs = zfcp_sdev_attrs
};
const struct attribute_group *zfcp_sysfs_sdev_attr_groups[] = {
&zfcp_sysfs_sdev_attr_group,
NULL
};
static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *scsi_host = dev_to_shost(dev);
struct fsf_qtcb_bottom_port *qtcb_port;
struct zfcp_adapter *adapter;
int retval;
adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
return -EOPNOTSUPP;
qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
if (!qtcb_port)
return -ENOMEM;
retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
if (retval == 0 || retval == -EAGAIN)
retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
qtcb_port->cb_util, qtcb_port->a_util);
kfree(qtcb_port);
return retval;
}
static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
static int zfcp_sysfs_adapter_ex_config(struct device *dev,
struct fsf_statistics_info *stat_inf)
{
struct Scsi_Host *scsi_host = dev_to_shost(dev);
struct fsf_qtcb_bottom_config *qtcb_config;
struct zfcp_adapter *adapter;
int retval;
adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
return -EOPNOTSUPP;
qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
GFP_KERNEL);
if (!qtcb_config)
return -ENOMEM;
retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
if (retval == 0 || retval == -EAGAIN)
*stat_inf = qtcb_config->stat_info;
kfree(qtcb_config);
return retval;
}
#define ZFCP_SHOST_ATTR(_name, _format, _arg...) \
static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
struct device_attribute *attr,\
char *buf) \
{ \
struct fsf_statistics_info stat_info; \
int retval; \
\
retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \
if (retval) \
return retval; \
\
return sprintf(buf, _format, ## _arg); \
} \
static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
(unsigned long long) stat_info.input_req,
(unsigned long long) stat_info.output_req,
(unsigned long long) stat_info.control_req);
ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
(unsigned long long) stat_info.input_mb,
(unsigned long long) stat_info.output_mb);
ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
(unsigned long long) stat_info.seconds_act);
static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct Scsi_Host *scsi_host = class_to_shost(dev);
struct zfcp_qdio *qdio =
((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
u64 util;
spin_lock_bh(&qdio->stat_lock);
util = qdio->req_q_util;
spin_unlock_bh(&qdio->stat_lock);
return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
(unsigned long long)util);
}
static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
static struct attribute *zfcp_sysfs_shost_attrs[] = {
&dev_attr_utilization.attr,
&dev_attr_requests.attr,
&dev_attr_megabytes.attr,
&dev_attr_seconds_active.attr,
&dev_attr_queue_full.attr,
NULL
};
static const struct attribute_group zfcp_sysfs_shost_attr_group = {
.attrs = zfcp_sysfs_shost_attrs
};
const struct attribute_group *zfcp_sysfs_shost_attr_groups[] = {
&zfcp_sysfs_shost_attr_group,
NULL
};
static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
struct device *dev, struct device_attribute *attr, char *buf)
{
struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
struct zfcp_diag_header *diag_hdr;
struct fc_els_flogi *nsp;
ssize_t rc = -ENOLINK;
unsigned long flags;
unsigned int status;
if (!adapter)
return -ENODEV;
status = atomic_read(&adapter->status);
if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
goto out;
diag_hdr = &adapter->diagnostics->config_data.header;
rc = zfcp_diag_update_buffer_limited(
adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
if (rc != 0)
goto out;
spin_lock_irqsave(&diag_hdr->access_lock, flags);
/* nport_serv_param doesn't contain the ELS_Command code */
nsp = (struct fc_els_flogi *)((unsigned long)
adapter->diagnostics->config_data
.data.nport_serv_param -
sizeof(u32));
rc = scnprintf(buf, 5 + 2, "%hu\n",
be16_to_cpu(nsp->fl_csp.sp_bb_cred));
spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
out:
zfcp_ccw_adapter_put(adapter);
return rc;
}
static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
#define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtsize, _prtfmt) \
static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show( \
struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct zfcp_adapter *const adapter = \
zfcp_ccw_adapter_by_cdev(to_ccwdev(dev)); \
struct zfcp_diag_header *diag_hdr; \
ssize_t rc = -ENOLINK; \
unsigned long flags; \
unsigned int status; \
\
if (!adapter) \
return -ENODEV; \
\
status = atomic_read(&adapter->status); \
if (0 == (status & ZFCP_STATUS_COMMON_OPEN) || \
0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) || \
0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED)) \
goto out; \
\
if (!zfcp_diag_support_sfp(adapter)) { \
rc = -EOPNOTSUPP; \
goto out; \
} \
\
diag_hdr = &adapter->diagnostics->port_data.header; \
\
rc = zfcp_diag_update_buffer_limited( \
adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
if (rc != 0) \
goto out; \
\
spin_lock_irqsave(&diag_hdr->access_lock, flags); \
rc = scnprintf( \
buf, (_prtsize) + 2, _prtfmt "\n", \
adapter->diagnostics->port_data.data._qtcb_member); \
spin_unlock_irqrestore(&diag_hdr->access_lock, flags); \
\
out: \
zfcp_ccw_adapter_put(adapter); \
return rc; \
} \
static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400, \
zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, 6, "%hd");
ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, 5, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, 5, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, 5, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, 5, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, 2, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, 1, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, 1, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, 1, "%hu");
ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, 1, "%hu");
static struct attribute *zfcp_sysfs_diag_attrs[] = {
&dev_attr_adapter_diag_sfp_temperature.attr,
&dev_attr_adapter_diag_sfp_vcc.attr,
&dev_attr_adapter_diag_sfp_tx_bias.attr,
&dev_attr_adapter_diag_sfp_tx_power.attr,
&dev_attr_adapter_diag_sfp_rx_power.attr,
&dev_attr_adapter_diag_sfp_port_tx_type.attr,
&dev_attr_adapter_diag_sfp_optical_port.attr,
&dev_attr_adapter_diag_sfp_sfp_invalid.attr,
&dev_attr_adapter_diag_sfp_connector_type.attr,
&dev_attr_adapter_diag_sfp_fec_active.attr,
&dev_attr_adapter_diag_b2b_credit.attr,
NULL,
};
static const struct attribute_group zfcp_sysfs_diag_attr_group = {
.name = "diagnostics",
.attrs = zfcp_sysfs_diag_attrs,
};
const struct attribute_group *zfcp_sysfs_adapter_attr_groups[] = {
&zfcp_sysfs_adapter_attr_group,
&zfcp_sysfs_diag_attr_group,
NULL,
};