[SCSI] zfcp: Move FSF request tracking code to new file
[linux-2.6.git] / drivers / s390 / scsi / zfcp_sysfs.c
1 /*
2  * zfcp device driver
3  *
4  * sysfs attributes.
5  *
6  * Copyright IBM Corporation 2008, 2009
7  */
8
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12 #include "zfcp_ext.h"
13
14 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
15 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
16                                                             _show, _store)
17 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)             \
18 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,         \
19                                                    struct device_attribute *at,\
20                                                    char *buf)                  \
21 {                                                                              \
22         struct _feat_def *_feat = container_of(dev, struct _feat_def,          \
23                                                sysfs_device);                  \
24                                                                                \
25         return sprintf(buf, _format, _value);                                  \
26 }                                                                              \
27 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,                                    \
28                      zfcp_sysfs_##_feat##_##_name##_show, NULL);
29
30 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value)                           \
31 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,         \
32                                                  struct device_attribute *at,\
33                                                  char *buf)                  \
34 {                                                                            \
35         struct ccw_device *cdev = to_ccwdev(dev);                            \
36         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);       \
37         int i;                                                               \
38                                                                              \
39         if (!adapter)                                                        \
40                 return -ENODEV;                                              \
41                                                                              \
42         i = sprintf(buf, _format, _value);                                   \
43         zfcp_ccw_adapter_put(adapter);                                       \
44         return i;                                                            \
45 }                                                                            \
46 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO,                                \
47                      zfcp_sysfs_adapter_##_name##_show, NULL);
48
49 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
50 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
51                    (unsigned long long) adapter->peer_wwnn);
52 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
53                    (unsigned long long) adapter->peer_wwpn);
54 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
55 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
56 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
57 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
58 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
59                                          ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
60
61 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
62                  atomic_read(&port->status));
63 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
64                  (atomic_read(&port->status) &
65                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
66 ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
67                  (atomic_read(&port->status) &
68                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
69
70 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
71                  atomic_read(&unit->status));
72 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
73                  (atomic_read(&unit->status) &
74                   ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
75 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
76                  (atomic_read(&unit->status) &
77                   ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
78 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
79                  (atomic_read(&unit->status) &
80                   ZFCP_STATUS_UNIT_SHARED) != 0);
81 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
82                  (atomic_read(&unit->status) &
83                   ZFCP_STATUS_UNIT_READONLY) != 0);
84
85 #define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id)     \
86 static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev,            \
87                                                 struct device_attribute *attr, \
88                                                 char *buf)                     \
89 {                                                                              \
90         struct _feat_def *_feat = container_of(dev, struct _feat_def,          \
91                                                sysfs_device);                  \
92                                                                                \
93         if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED)       \
94                 return sprintf(buf, "1\n");                                    \
95         else                                                                   \
96                 return sprintf(buf, "0\n");                                    \
97 }                                                                              \
98 static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev,           \
99                                                  struct device_attribute *attr,\
100                                                  const char *buf, size_t count)\
101 {                                                                              \
102         struct _feat_def *_feat = container_of(dev, struct _feat_def,          \
103                                                sysfs_device);                  \
104         unsigned long val;                                                     \
105         int retval = 0;                                                        \
106                                                                                \
107         if (!(_feat && get_device(&_feat->sysfs_device)))                      \
108                 return -EBUSY;                                                 \
109                                                                                \
110         if (strict_strtoul(buf, 0, &val) || val != 0) {                        \
111                 retval = -EINVAL;                                              \
112                 goto out;                                                      \
113         }                                                                      \
114                                                                                \
115         zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL,                 \
116                                          ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
117         zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED,        \
118                                   _reopen_id, NULL);                           \
119         zfcp_erp_wait(_adapter);                                               \
120 out:                                                                           \
121         put_device(&_feat->sysfs_device);                                      \
122         return retval ? retval : (ssize_t) count;                              \
123 }                                                                              \
124 static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO,                         \
125                      zfcp_sysfs_##_feat##_failed_show,                         \
126                      zfcp_sysfs_##_feat##_failed_store);
127
128 ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, "sypfai1", "sypfai2");
129 ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, "syufai1", "syufai2");
130
131 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
132                                               struct device_attribute *attr,
133                                               char *buf)
134 {
135         struct ccw_device *cdev = to_ccwdev(dev);
136         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
137         int i;
138
139         if (!adapter)
140                 return -ENODEV;
141
142         if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
143                 i = sprintf(buf, "1\n");
144         else
145                 i = sprintf(buf, "0\n");
146
147         zfcp_ccw_adapter_put(adapter);
148         return i;
149 }
150
151 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
152                                                struct device_attribute *attr,
153                                                const char *buf, size_t count)
154 {
155         struct ccw_device *cdev = to_ccwdev(dev);
156         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
157         unsigned long val;
158         int retval = 0;
159
160         if (!adapter)
161                 return -ENODEV;
162
163         if (strict_strtoul(buf, 0, &val) || val != 0) {
164                 retval = -EINVAL;
165                 goto out;
166         }
167
168         zfcp_erp_modify_adapter_status(adapter, "syafai1", NULL,
169                                        ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
170         zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED,
171                                 "syafai2", NULL);
172         zfcp_erp_wait(adapter);
173 out:
174         zfcp_ccw_adapter_put(adapter);
175         return retval ? retval : (ssize_t) count;
176 }
177 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
178                      zfcp_sysfs_adapter_failed_show,
179                      zfcp_sysfs_adapter_failed_store);
180
181 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
182                                             struct device_attribute *attr,
183                                             const char *buf, size_t count)
184 {
185         struct ccw_device *cdev = to_ccwdev(dev);
186         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
187
188         if (!adapter)
189                 return -ENODEV;
190
191         /* sync the user-space- with the kernel-invocation of scan_work */
192         queue_work(adapter->work_queue, &adapter->scan_work);
193         flush_work(&adapter->scan_work);
194         zfcp_ccw_adapter_put(adapter);
195
196         return (ssize_t) count;
197 }
198 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
199                      zfcp_sysfs_port_rescan_store);
200
201 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
202                                             struct device_attribute *attr,
203                                             const char *buf, size_t count)
204 {
205         struct ccw_device *cdev = to_ccwdev(dev);
206         struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
207         struct zfcp_port *port;
208         u64 wwpn;
209         int retval = -EINVAL;
210
211         if (!adapter)
212                 return -ENODEV;
213
214         if (strict_strtoull(buf, 0, (unsigned long long *) &wwpn))
215                 goto out;
216
217         port = zfcp_get_port_by_wwpn(adapter, wwpn);
218         if (!port)
219                 goto out;
220         else
221                 retval = 0;
222
223         write_lock_irq(&adapter->port_list_lock);
224         list_del(&port->list);
225         write_unlock_irq(&adapter->port_list_lock);
226
227         put_device(&port->sysfs_device);
228
229         zfcp_erp_port_shutdown(port, 0, "syprs_1", NULL);
230         zfcp_device_unregister(&port->sysfs_device, &zfcp_sysfs_port_attrs);
231  out:
232         zfcp_ccw_adapter_put(adapter);
233         return retval ? retval : (ssize_t) count;
234 }
235 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
236                      zfcp_sysfs_port_remove_store);
237
238 static struct attribute *zfcp_adapter_attrs[] = {
239         &dev_attr_adapter_failed.attr,
240         &dev_attr_adapter_in_recovery.attr,
241         &dev_attr_adapter_port_remove.attr,
242         &dev_attr_adapter_port_rescan.attr,
243         &dev_attr_adapter_peer_wwnn.attr,
244         &dev_attr_adapter_peer_wwpn.attr,
245         &dev_attr_adapter_peer_d_id.attr,
246         &dev_attr_adapter_card_version.attr,
247         &dev_attr_adapter_lic_version.attr,
248         &dev_attr_adapter_status.attr,
249         &dev_attr_adapter_hardware_version.attr,
250         NULL
251 };
252
253 struct attribute_group zfcp_sysfs_adapter_attrs = {
254         .attrs = zfcp_adapter_attrs,
255 };
256
257 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
258                                          struct device_attribute *attr,
259                                          const char *buf, size_t count)
260 {
261         struct zfcp_port *port = container_of(dev, struct zfcp_port,
262                                               sysfs_device);
263         struct zfcp_unit *unit;
264         u64 fcp_lun;
265         int retval = -EINVAL;
266
267         if (!(port && get_device(&port->sysfs_device)))
268                 return -EBUSY;
269
270         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
271                 goto out;
272
273         unit = zfcp_unit_enqueue(port, fcp_lun);
274         if (IS_ERR(unit))
275                 goto out;
276         else
277                 retval = 0;
278
279         zfcp_erp_unit_reopen(unit, 0, "syuas_1", NULL);
280         zfcp_erp_wait(unit->port->adapter);
281         flush_work(&unit->scsi_work);
282 out:
283         put_device(&port->sysfs_device);
284         return retval ? retval : (ssize_t) count;
285 }
286 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
287
288 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
289                                             struct device_attribute *attr,
290                                             const char *buf, size_t count)
291 {
292         struct zfcp_port *port = container_of(dev, struct zfcp_port,
293                                               sysfs_device);
294         struct zfcp_unit *unit;
295         u64 fcp_lun;
296         int retval = -EINVAL;
297
298         if (!(port && get_device(&port->sysfs_device)))
299                 return -EBUSY;
300
301         if (strict_strtoull(buf, 0, (unsigned long long *) &fcp_lun))
302                 goto out;
303
304         unit = zfcp_get_unit_by_lun(port, fcp_lun);
305         if (!unit)
306                 goto out;
307         else
308                 retval = 0;
309
310         /* wait for possible timeout during SCSI probe */
311         flush_work(&unit->scsi_work);
312
313         write_lock_irq(&port->unit_list_lock);
314         list_del(&unit->list);
315         write_unlock_irq(&port->unit_list_lock);
316
317         put_device(&unit->sysfs_device);
318
319         zfcp_erp_unit_shutdown(unit, 0, "syurs_1", NULL);
320         zfcp_device_unregister(&unit->sysfs_device, &zfcp_sysfs_unit_attrs);
321 out:
322         put_device(&port->sysfs_device);
323         return retval ? retval : (ssize_t) count;
324 }
325 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
326
327 static struct attribute *zfcp_port_attrs[] = {
328         &dev_attr_unit_add.attr,
329         &dev_attr_unit_remove.attr,
330         &dev_attr_port_failed.attr,
331         &dev_attr_port_in_recovery.attr,
332         &dev_attr_port_status.attr,
333         &dev_attr_port_access_denied.attr,
334         NULL
335 };
336
337 /**
338  * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
339  */
340 struct attribute_group zfcp_sysfs_port_attrs = {
341         .attrs = zfcp_port_attrs,
342 };
343
344 static struct attribute *zfcp_unit_attrs[] = {
345         &dev_attr_unit_failed.attr,
346         &dev_attr_unit_in_recovery.attr,
347         &dev_attr_unit_status.attr,
348         &dev_attr_unit_access_denied.attr,
349         &dev_attr_unit_access_shared.attr,
350         &dev_attr_unit_access_readonly.attr,
351         NULL
352 };
353
354 struct attribute_group zfcp_sysfs_unit_attrs = {
355         .attrs = zfcp_unit_attrs,
356 };
357
358 #define ZFCP_DEFINE_LATENCY_ATTR(_name)                                 \
359 static ssize_t                                                          \
360 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,              \
361                                        struct device_attribute *attr,   \
362                                        char *buf) {                     \
363         struct scsi_device *sdev = to_scsi_device(dev);                 \
364         struct zfcp_unit *unit = sdev->hostdata;                        \
365         struct zfcp_latencies *lat = &unit->latencies;                  \
366         struct zfcp_adapter *adapter = unit->port->adapter;             \
367         unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;      \
368                                                                         \
369         spin_lock_bh(&lat->lock);                                       \
370         fsum = lat->_name.fabric.sum * adapter->timer_ticks;            \
371         fmin = lat->_name.fabric.min * adapter->timer_ticks;            \
372         fmax = lat->_name.fabric.max * adapter->timer_ticks;            \
373         csum = lat->_name.channel.sum * adapter->timer_ticks;           \
374         cmin = lat->_name.channel.min * adapter->timer_ticks;           \
375         cmax = lat->_name.channel.max * adapter->timer_ticks;           \
376         cc  = lat->_name.counter;                                       \
377         spin_unlock_bh(&lat->lock);                                     \
378                                                                         \
379         do_div(fsum, 1000);                                             \
380         do_div(fmin, 1000);                                             \
381         do_div(fmax, 1000);                                             \
382         do_div(csum, 1000);                                             \
383         do_div(cmin, 1000);                                             \
384         do_div(cmax, 1000);                                             \
385                                                                         \
386         return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",     \
387                        fmin, fmax, fsum, cmin, cmax, csum, cc);         \
388 }                                                                       \
389 static ssize_t                                                          \
390 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,             \
391                                         struct device_attribute *attr,  \
392                                         const char *buf, size_t count)  \
393 {                                                                       \
394         struct scsi_device *sdev = to_scsi_device(dev);                 \
395         struct zfcp_unit *unit = sdev->hostdata;                        \
396         struct zfcp_latencies *lat = &unit->latencies;                  \
397         unsigned long flags;                                            \
398                                                                         \
399         spin_lock_irqsave(&lat->lock, flags);                           \
400         lat->_name.fabric.sum = 0;                                      \
401         lat->_name.fabric.min = 0xFFFFFFFF;                             \
402         lat->_name.fabric.max = 0;                                      \
403         lat->_name.channel.sum = 0;                                     \
404         lat->_name.channel.min = 0xFFFFFFFF;                            \
405         lat->_name.channel.max = 0;                                     \
406         lat->_name.counter = 0;                                         \
407         spin_unlock_irqrestore(&lat->lock, flags);                      \
408                                                                         \
409         return (ssize_t) count;                                         \
410 }                                                                       \
411 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,                  \
412                    zfcp_sysfs_unit_##_name##_latency_show,              \
413                    zfcp_sysfs_unit_##_name##_latency_store);
414
415 ZFCP_DEFINE_LATENCY_ATTR(read);
416 ZFCP_DEFINE_LATENCY_ATTR(write);
417 ZFCP_DEFINE_LATENCY_ATTR(cmd);
418
419 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                   \
420 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,       \
421                                               struct device_attribute *attr,\
422                                               char *buf)                 \
423 {                                                                        \
424         struct scsi_device *sdev  = to_scsi_device(dev);                 \
425         struct zfcp_unit *unit = sdev->hostdata;                         \
426                                                                          \
427         return sprintf(buf, _format, _value);                            \
428 }                                                                        \
429 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
430
431 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
432                       dev_name(&unit->port->adapter->ccw_device->dev));
433 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
434                       (unsigned long long) unit->port->wwpn);
435 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n",
436                       (unsigned long long) unit->fcp_lun);
437
438 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
439         &dev_attr_fcp_lun,
440         &dev_attr_wwpn,
441         &dev_attr_hba_id,
442         &dev_attr_read_latency,
443         &dev_attr_write_latency,
444         &dev_attr_cmd_latency,
445         NULL
446 };
447
448 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
449                                             struct device_attribute *attr,
450                                             char *buf)
451 {
452         struct Scsi_Host *scsi_host = dev_to_shost(dev);
453         struct fsf_qtcb_bottom_port *qtcb_port;
454         struct zfcp_adapter *adapter;
455         int retval;
456
457         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
458         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
459                 return -EOPNOTSUPP;
460
461         qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
462         if (!qtcb_port)
463                 return -ENOMEM;
464
465         retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
466         if (!retval)
467                 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
468                                  qtcb_port->cb_util, qtcb_port->a_util);
469         kfree(qtcb_port);
470         return retval;
471 }
472 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
473
474 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
475                                         struct fsf_statistics_info *stat_inf)
476 {
477         struct Scsi_Host *scsi_host = dev_to_shost(dev);
478         struct fsf_qtcb_bottom_config *qtcb_config;
479         struct zfcp_adapter *adapter;
480         int retval;
481
482         adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
483         if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
484                 return -EOPNOTSUPP;
485
486         qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
487                               GFP_KERNEL);
488         if (!qtcb_config)
489                 return -ENOMEM;
490
491         retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
492         if (!retval)
493                 *stat_inf = qtcb_config->stat_info;
494
495         kfree(qtcb_config);
496         return retval;
497 }
498
499 #define ZFCP_SHOST_ATTR(_name, _format, _arg...)                        \
500 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,    \
501                                                  struct device_attribute *attr,\
502                                                  char *buf)             \
503 {                                                                       \
504         struct fsf_statistics_info stat_info;                           \
505         int retval;                                                     \
506                                                                         \
507         retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);         \
508         if (retval)                                                     \
509                 return retval;                                          \
510                                                                         \
511         return sprintf(buf, _format, ## _arg);                          \
512 }                                                                       \
513 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
514
515 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
516                 (unsigned long long) stat_info.input_req,
517                 (unsigned long long) stat_info.output_req,
518                 (unsigned long long) stat_info.control_req);
519
520 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
521                 (unsigned long long) stat_info.input_mb,
522                 (unsigned long long) stat_info.output_mb);
523
524 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
525                 (unsigned long long) stat_info.seconds_act);
526
527 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
528                                               struct device_attribute *attr,
529                                               char *buf)
530 {
531         struct Scsi_Host *scsi_host = class_to_shost(dev);
532         struct zfcp_qdio *qdio =
533                 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
534         u64 util;
535
536         spin_lock_bh(&qdio->stat_lock);
537         util = qdio->req_q_util;
538         spin_unlock_bh(&qdio->stat_lock);
539
540         return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
541                        (unsigned long long)util);
542 }
543 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
544
545 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
546         &dev_attr_utilization,
547         &dev_attr_requests,
548         &dev_attr_megabytes,
549         &dev_attr_seconds_active,
550         &dev_attr_queue_full,
551         NULL
552 };