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Revert "tty: hvc: Fix data abort due to race in hvc_open"
[linux/fpc-iii.git] / drivers / s390 / scsi / zfcp_sysfs.c
blob7ec30ded016947e701a33e2e10e667dfe83e35e0
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * zfcp device driver
4 *
5 * sysfs attributes.
6 *
7 * Copyright IBM Corp. 2008, 2020
8 */
9
10 #define KMSG_COMPONENT "zfcp"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/slab.h>
14 #include "zfcp_diag.h"
15 #include "zfcp_ext.h"
16
17 #define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
18 struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
19 _show, _store)
20 #define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value) \
21 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
22 struct device_attribute *at,\
23 char *buf) \
24 { \
25 struct _feat_def *_feat = container_of(dev, struct _feat_def, dev); \
26 \
27 return sprintf(buf, _format, _value); \
28 } \
29 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
30 zfcp_sysfs_##_feat##_##_name##_show, NULL);
31
32 #define ZFCP_DEFINE_ATTR_CONST(_feat, _name, _format, _value) \
33 static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \
34 struct device_attribute *at,\
35 char *buf) \
36 { \
37 return sprintf(buf, _format, _value); \
38 } \
39 static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO, \
40 zfcp_sysfs_##_feat##_##_name##_show, NULL);
41
42 #define ZFCP_DEFINE_A_ATTR(_name, _format, _value) \
43 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
44 struct device_attribute *at,\
45 char *buf) \
46 { \
47 struct ccw_device *cdev = to_ccwdev(dev); \
48 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev); \
49 int i; \
50 \
51 if (!adapter) \
52 return -ENODEV; \
53 \
54 i = sprintf(buf, _format, _value); \
55 zfcp_ccw_adapter_put(adapter); \
56 return i; \
57 } \
58 static ZFCP_DEV_ATTR(adapter, _name, S_IRUGO, \
59 zfcp_sysfs_adapter_##_name##_show, NULL);
60
61 ZFCP_DEFINE_A_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
62 ZFCP_DEFINE_A_ATTR(peer_wwnn, "0x%016llx\n",
63 (unsigned long long) adapter->peer_wwnn);
64 ZFCP_DEFINE_A_ATTR(peer_wwpn, "0x%016llx\n",
65 (unsigned long long) adapter->peer_wwpn);
66 ZFCP_DEFINE_A_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
67 ZFCP_DEFINE_A_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
68 ZFCP_DEFINE_A_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
69 ZFCP_DEFINE_A_ATTR(hardware_version, "0x%08x\n", adapter->hardware_version);
70 ZFCP_DEFINE_A_ATTR(in_recovery, "%d\n", (atomic_read(&adapter->status) &
71 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
72
73 ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
74 atomic_read(&port->status));
75 ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
76 (atomic_read(&port->status) &
77 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
78 ZFCP_DEFINE_ATTR_CONST(port, access_denied, "%d\n", 0);
79
80 ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
81 zfcp_unit_sdev_status(unit));
82 ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
83 (zfcp_unit_sdev_status(unit) &
84 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
85 ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
86 (zfcp_unit_sdev_status(unit) &
87 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
88 ZFCP_DEFINE_ATTR_CONST(unit, access_shared, "%d\n", 0);
89 ZFCP_DEFINE_ATTR_CONST(unit, access_readonly, "%d\n", 0);
90
91 static ssize_t zfcp_sysfs_port_failed_show(struct device *dev,
92 struct device_attribute *attr,
93 char *buf)
94 {
95 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
96
97 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
98 return sprintf(buf, "1\n");
99
100 return sprintf(buf, "0\n");
101 }
102
103 static ssize_t zfcp_sysfs_port_failed_store(struct device *dev,
104 struct device_attribute *attr,
105 const char *buf, size_t count)
106 {
107 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
108 unsigned long val;
109
110 if (kstrtoul(buf, 0, &val) || val != 0)
111 return -EINVAL;
112
113 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_RUNNING);
114 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, "sypfai2");
115 zfcp_erp_wait(port->adapter);
116
117 return count;
118 }
119 static ZFCP_DEV_ATTR(port, failed, S_IWUSR | S_IRUGO,
120 zfcp_sysfs_port_failed_show,
121 zfcp_sysfs_port_failed_store);
122
123 static ssize_t zfcp_sysfs_unit_failed_show(struct device *dev,
124 struct device_attribute *attr,
125 char *buf)
126 {
127 struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
128 struct scsi_device *sdev;
129 unsigned int status, failed = 1;
130
131 sdev = zfcp_unit_sdev(unit);
132 if (sdev) {
133 status = atomic_read(&sdev_to_zfcp(sdev)->status);
134 failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
135 scsi_device_put(sdev);
136 }
137
138 return sprintf(buf, "%d\n", failed);
139 }
140
141 static ssize_t zfcp_sysfs_unit_failed_store(struct device *dev,
142 struct device_attribute *attr,
143 const char *buf, size_t count)
144 {
145 struct zfcp_unit *unit = container_of(dev, struct zfcp_unit, dev);
146 unsigned long val;
147 struct scsi_device *sdev;
148
149 if (kstrtoul(buf, 0, &val) || val != 0)
150 return -EINVAL;
151
152 sdev = zfcp_unit_sdev(unit);
153 if (sdev) {
154 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
155 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
156 "syufai2");
157 zfcp_erp_wait(unit->port->adapter);
158 } else
159 zfcp_unit_scsi_scan(unit);
160
161 return count;
162 }
163 static ZFCP_DEV_ATTR(unit, failed, S_IWUSR | S_IRUGO,
164 zfcp_sysfs_unit_failed_show,
165 zfcp_sysfs_unit_failed_store);
166
167 static ssize_t zfcp_sysfs_adapter_failed_show(struct device *dev,
168 struct device_attribute *attr,
169 char *buf)
170 {
171 struct ccw_device *cdev = to_ccwdev(dev);
172 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
173 int i;
174
175 if (!adapter)
176 return -ENODEV;
177
178 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
179 i = sprintf(buf, "1\n");
180 else
181 i = sprintf(buf, "0\n");
182
183 zfcp_ccw_adapter_put(adapter);
184 return i;
185 }
186
187 static ssize_t zfcp_sysfs_adapter_failed_store(struct device *dev,
188 struct device_attribute *attr,
189 const char *buf, size_t count)
190 {
191 struct ccw_device *cdev = to_ccwdev(dev);
192 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
193 unsigned long val;
194 int retval = 0;
195
196 if (!adapter)
197 return -ENODEV;
198
199 if (kstrtoul(buf, 0, &val) || val != 0) {
200 retval = -EINVAL;
201 goto out;
202 }
203
204 zfcp_erp_adapter_reset_sync(adapter, "syafai2");
205 out:
206 zfcp_ccw_adapter_put(adapter);
207 return retval ? retval : (ssize_t) count;
208 }
209 static ZFCP_DEV_ATTR(adapter, failed, S_IWUSR | S_IRUGO,
210 zfcp_sysfs_adapter_failed_show,
211 zfcp_sysfs_adapter_failed_store);
212
213 static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
214 struct device_attribute *attr,
215 const char *buf, size_t count)
216 {
217 struct ccw_device *cdev = to_ccwdev(dev);
218 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
219
220 if (!adapter)
221 return -ENODEV;
222
223 /*
224 * Users wish is our command: immediately schedule and flush a
225 * worker to conduct a synchronous port scan, that is, neither
226 * a random delay nor a rate limit is applied here.
227 */
228 queue_delayed_work(adapter->work_queue, &adapter->scan_work, 0);
229 flush_delayed_work(&adapter->scan_work);
230 zfcp_ccw_adapter_put(adapter);
231
232 return (ssize_t) count;
233 }
234 static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
235 zfcp_sysfs_port_rescan_store);
236
237 DEFINE_MUTEX(zfcp_sysfs_port_units_mutex);
238
239 static void zfcp_sysfs_port_set_removing(struct zfcp_port *const port)
240 {
241 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
242 atomic_set(&port->units, -1);
243 }
244
245 bool zfcp_sysfs_port_is_removing(const struct zfcp_port *const port)
246 {
247 lockdep_assert_held(&zfcp_sysfs_port_units_mutex);
248 return atomic_read(&port->units) == -1;
249 }
250
251 static bool zfcp_sysfs_port_in_use(struct zfcp_port *const port)
252 {
253 struct zfcp_adapter *const adapter = port->adapter;
254 unsigned long flags;
255 struct scsi_device *sdev;
256 bool in_use = true;
257
258 mutex_lock(&zfcp_sysfs_port_units_mutex);
259 if (atomic_read(&port->units) > 0)
260 goto unlock_port_units_mutex; /* zfcp_unit(s) under port */
261
262 spin_lock_irqsave(adapter->scsi_host->host_lock, flags);
263 __shost_for_each_device(sdev, adapter->scsi_host) {
264 const struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
265
266 if (sdev->sdev_state == SDEV_DEL ||
267 sdev->sdev_state == SDEV_CANCEL)
268 continue;
269 if (zsdev->port != port)
270 continue;
271 /* alive scsi_device under port of interest */
272 goto unlock_host_lock;
273 }
274
275 /* port is about to be removed, so no more unit_add or slave_alloc */
276 zfcp_sysfs_port_set_removing(port);
277 in_use = false;
278
279 unlock_host_lock:
280 spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags);
281 unlock_port_units_mutex:
282 mutex_unlock(&zfcp_sysfs_port_units_mutex);
283 return in_use;
284 }
285
286 static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
287 struct device_attribute *attr,
288 const char *buf, size_t count)
289 {
290 struct ccw_device *cdev = to_ccwdev(dev);
291 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
292 struct zfcp_port *port;
293 u64 wwpn;
294 int retval = -EINVAL;
295
296 if (!adapter)
297 return -ENODEV;
298
299 if (kstrtoull(buf, 0, (unsigned long long *) &wwpn))
300 goto out;
301
302 port = zfcp_get_port_by_wwpn(adapter, wwpn);
303 if (!port)
304 goto out;
305 else
306 retval = 0;
307
308 if (zfcp_sysfs_port_in_use(port)) {
309 retval = -EBUSY;
310 put_device(&port->dev); /* undo zfcp_get_port_by_wwpn() */
311 goto out;
312 }
313
314 write_lock_irq(&adapter->port_list_lock);
315 list_del(&port->list);
316 write_unlock_irq(&adapter->port_list_lock);
317
318 put_device(&port->dev);
319
320 zfcp_erp_port_shutdown(port, 0, "syprs_1");
321 device_unregister(&port->dev);
322 out:
323 zfcp_ccw_adapter_put(adapter);
324 return retval ? retval : (ssize_t) count;
325 }
326 static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
327 zfcp_sysfs_port_remove_store);
328
329 static ssize_t
330 zfcp_sysfs_adapter_diag_max_age_show(struct device *dev,
331 struct device_attribute *attr, char *buf)
332 {
333 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
334 ssize_t rc;
335
336 if (!adapter)
337 return -ENODEV;
338
339 /* ceil(log(2^64 - 1) / log(10)) = 20 */
340 rc = scnprintf(buf, 20 + 2, "%lu\n", adapter->diagnostics->max_age);
341
342 zfcp_ccw_adapter_put(adapter);
343 return rc;
344 }
345
346 static ssize_t
347 zfcp_sysfs_adapter_diag_max_age_store(struct device *dev,
348 struct device_attribute *attr,
349 const char *buf, size_t count)
350 {
351 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
352 unsigned long max_age;
353 ssize_t rc;
354
355 if (!adapter)
356 return -ENODEV;
357
358 rc = kstrtoul(buf, 10, &max_age);
359 if (rc != 0)
360 goto out;
361
362 adapter->diagnostics->max_age = max_age;
363
364 rc = count;
365 out:
366 zfcp_ccw_adapter_put(adapter);
367 return rc;
368 }
369 static ZFCP_DEV_ATTR(adapter, diag_max_age, 0644,
370 zfcp_sysfs_adapter_diag_max_age_show,
371 zfcp_sysfs_adapter_diag_max_age_store);
372
373 static ssize_t zfcp_sysfs_adapter_fc_security_show(
374 struct device *dev, struct device_attribute *attr, char *buf)
375 {
376 struct ccw_device *cdev = to_ccwdev(dev);
377 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(cdev);
378 unsigned int status;
379 int i;
380
381 if (!adapter)
382 return -ENODEV;
383
384 /*
385 * Adapter status COMMON_OPEN implies xconf data and xport data
386 * was done. Adapter FC Endpoint Security capability remains
387 * unchanged in case of COMMON_ERP_FAILED (e.g. due to local link
388 * down).
389 */
390 status = atomic_read(&adapter->status);
391 if (0 == (status & ZFCP_STATUS_COMMON_OPEN))
392 i = sprintf(buf, "unknown\n");
393 else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
394 i = sprintf(buf, "unsupported\n");
395 else {
396 i = zfcp_fsf_scnprint_fc_security(
397 buf, PAGE_SIZE - 1, adapter->fc_security_algorithms,
398 ZFCP_FSF_PRINT_FMT_LIST);
399 i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
400 }
401
402 zfcp_ccw_adapter_put(adapter);
403 return i;
404 }
405 static ZFCP_DEV_ATTR(adapter, fc_security, S_IRUGO,
406 zfcp_sysfs_adapter_fc_security_show,
407 NULL);
408
409 static struct attribute *zfcp_adapter_attrs[] = {
410 &dev_attr_adapter_failed.attr,
411 &dev_attr_adapter_in_recovery.attr,
412 &dev_attr_adapter_port_remove.attr,
413 &dev_attr_adapter_port_rescan.attr,
414 &dev_attr_adapter_peer_wwnn.attr,
415 &dev_attr_adapter_peer_wwpn.attr,
416 &dev_attr_adapter_peer_d_id.attr,
417 &dev_attr_adapter_card_version.attr,
418 &dev_attr_adapter_lic_version.attr,
419 &dev_attr_adapter_status.attr,
420 &dev_attr_adapter_hardware_version.attr,
421 &dev_attr_adapter_diag_max_age.attr,
422 &dev_attr_adapter_fc_security.attr,
423 NULL
424 };
425
426 struct attribute_group zfcp_sysfs_adapter_attrs = {
427 .attrs = zfcp_adapter_attrs,
428 };
429
430 static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
431 struct device_attribute *attr,
432 const char *buf, size_t count)
433 {
434 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
435 u64 fcp_lun;
436 int retval;
437
438 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
439 return -EINVAL;
440
441 retval = zfcp_unit_add(port, fcp_lun);
442 if (retval)
443 return retval;
444
445 return count;
446 }
447 static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
448
449 static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
450 struct device_attribute *attr,
451 const char *buf, size_t count)
452 {
453 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
454 u64 fcp_lun;
455
456 if (kstrtoull(buf, 0, (unsigned long long *) &fcp_lun))
457 return -EINVAL;
458
459 if (zfcp_unit_remove(port, fcp_lun))
460 return -EINVAL;
461
462 return count;
463 }
464 static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
465
466 static ssize_t zfcp_sysfs_port_fc_security_show(struct device *dev,
467 struct device_attribute *attr,
468 char *buf)
469 {
470 struct zfcp_port *port = container_of(dev, struct zfcp_port, dev);
471 struct zfcp_adapter *adapter = port->adapter;
472 unsigned int status = atomic_read(&port->status);
473 int i;
474
475 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
476 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
477 0 == (status & ZFCP_STATUS_PORT_PHYS_OPEN) ||
478 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
479 0 != (status & ZFCP_STATUS_COMMON_ACCESS_BOXED))
480 i = sprintf(buf, "unknown\n");
481 else if (!(adapter->adapter_features & FSF_FEATURE_FC_SECURITY))
482 i = sprintf(buf, "unsupported\n");
483 else {
484 i = zfcp_fsf_scnprint_fc_security(
485 buf, PAGE_SIZE - 1, port->connection_info,
486 ZFCP_FSF_PRINT_FMT_SINGLEITEM);
487 i += scnprintf(buf + i, PAGE_SIZE - i, "\n");
488 }
489
490 return i;
491 }
492 static ZFCP_DEV_ATTR(port, fc_security, S_IRUGO,
493 zfcp_sysfs_port_fc_security_show,
494 NULL);
495
496 static struct attribute *zfcp_port_attrs[] = {
497 &dev_attr_unit_add.attr,
498 &dev_attr_unit_remove.attr,
499 &dev_attr_port_failed.attr,
500 &dev_attr_port_in_recovery.attr,
501 &dev_attr_port_status.attr,
502 &dev_attr_port_access_denied.attr,
503 &dev_attr_port_fc_security.attr,
504 NULL
505 };
506 static struct attribute_group zfcp_port_attr_group = {
507 .attrs = zfcp_port_attrs,
508 };
509 const struct attribute_group *zfcp_port_attr_groups[] = {
510 &zfcp_port_attr_group,
511 NULL,
512 };
513
514 static struct attribute *zfcp_unit_attrs[] = {
515 &dev_attr_unit_failed.attr,
516 &dev_attr_unit_in_recovery.attr,
517 &dev_attr_unit_status.attr,
518 &dev_attr_unit_access_denied.attr,
519 &dev_attr_unit_access_shared.attr,
520 &dev_attr_unit_access_readonly.attr,
521 NULL
522 };
523 static struct attribute_group zfcp_unit_attr_group = {
524 .attrs = zfcp_unit_attrs,
525 };
526 const struct attribute_group *zfcp_unit_attr_groups[] = {
527 &zfcp_unit_attr_group,
528 NULL,
529 };
530
531 #define ZFCP_DEFINE_LATENCY_ATTR(_name) \
532 static ssize_t \
533 zfcp_sysfs_unit_##_name##_latency_show(struct device *dev, \
534 struct device_attribute *attr, \
535 char *buf) { \
536 struct scsi_device *sdev = to_scsi_device(dev); \
537 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
538 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
539 struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; \
540 unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc; \
541 \
542 spin_lock_bh(&lat->lock); \
543 fsum = lat->_name.fabric.sum * adapter->timer_ticks; \
544 fmin = lat->_name.fabric.min * adapter->timer_ticks; \
545 fmax = lat->_name.fabric.max * adapter->timer_ticks; \
546 csum = lat->_name.channel.sum * adapter->timer_ticks; \
547 cmin = lat->_name.channel.min * adapter->timer_ticks; \
548 cmax = lat->_name.channel.max * adapter->timer_ticks; \
549 cc = lat->_name.counter; \
550 spin_unlock_bh(&lat->lock); \
551 \
552 do_div(fsum, 1000); \
553 do_div(fmin, 1000); \
554 do_div(fmax, 1000); \
555 do_div(csum, 1000); \
556 do_div(cmin, 1000); \
557 do_div(cmax, 1000); \
558 \
559 return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n", \
560 fmin, fmax, fsum, cmin, cmax, csum, cc); \
561 } \
562 static ssize_t \
563 zfcp_sysfs_unit_##_name##_latency_store(struct device *dev, \
564 struct device_attribute *attr, \
565 const char *buf, size_t count) \
566 { \
567 struct scsi_device *sdev = to_scsi_device(dev); \
568 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
569 struct zfcp_latencies *lat = &zfcp_sdev->latencies; \
570 unsigned long flags; \
571 \
572 spin_lock_irqsave(&lat->lock, flags); \
573 lat->_name.fabric.sum = 0; \
574 lat->_name.fabric.min = 0xFFFFFFFF; \
575 lat->_name.fabric.max = 0; \
576 lat->_name.channel.sum = 0; \
577 lat->_name.channel.min = 0xFFFFFFFF; \
578 lat->_name.channel.max = 0; \
579 lat->_name.counter = 0; \
580 spin_unlock_irqrestore(&lat->lock, flags); \
581 \
582 return (ssize_t) count; \
583 } \
584 static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO, \
585 zfcp_sysfs_unit_##_name##_latency_show, \
586 zfcp_sysfs_unit_##_name##_latency_store);
587
588 ZFCP_DEFINE_LATENCY_ATTR(read);
589 ZFCP_DEFINE_LATENCY_ATTR(write);
590 ZFCP_DEFINE_LATENCY_ATTR(cmd);
591
592 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value) \
593 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, \
594 struct device_attribute *attr,\
595 char *buf) \
596 { \
597 struct scsi_device *sdev = to_scsi_device(dev); \
598 struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); \
599 \
600 return sprintf(buf, _format, _value); \
601 } \
602 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
603
604 ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
605 dev_name(&zfcp_sdev->port->adapter->ccw_device->dev));
606 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n",
607 (unsigned long long) zfcp_sdev->port->wwpn);
608
609 static ssize_t zfcp_sysfs_scsi_fcp_lun_show(struct device *dev,
610 struct device_attribute *attr,
611 char *buf)
612 {
613 struct scsi_device *sdev = to_scsi_device(dev);
614
615 return sprintf(buf, "0x%016llx\n", zfcp_scsi_dev_lun(sdev));
616 }
617 static DEVICE_ATTR(fcp_lun, S_IRUGO, zfcp_sysfs_scsi_fcp_lun_show, NULL);
618
619 ZFCP_DEFINE_SCSI_ATTR(zfcp_access_denied, "%d\n",
620 (atomic_read(&zfcp_sdev->status) &
621 ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
622
623 static ssize_t zfcp_sysfs_scsi_zfcp_failed_show(struct device *dev,
624 struct device_attribute *attr,
625 char *buf)
626 {
627 struct scsi_device *sdev = to_scsi_device(dev);
628 unsigned int status = atomic_read(&sdev_to_zfcp(sdev)->status);
629 unsigned int failed = status & ZFCP_STATUS_COMMON_ERP_FAILED ? 1 : 0;
630
631 return sprintf(buf, "%d\n", failed);
632 }
633
634 static ssize_t zfcp_sysfs_scsi_zfcp_failed_store(struct device *dev,
635 struct device_attribute *attr,
636 const char *buf, size_t count)
637 {
638 struct scsi_device *sdev = to_scsi_device(dev);
639 unsigned long val;
640
641 if (kstrtoul(buf, 0, &val) || val != 0)
642 return -EINVAL;
643
644 zfcp_erp_set_lun_status(sdev, ZFCP_STATUS_COMMON_RUNNING);
645 zfcp_erp_lun_reopen(sdev, ZFCP_STATUS_COMMON_ERP_FAILED,
646 "syufai3");
647 zfcp_erp_wait(sdev_to_zfcp(sdev)->port->adapter);
648
649 return count;
650 }
651 static DEVICE_ATTR(zfcp_failed, S_IWUSR | S_IRUGO,
652 zfcp_sysfs_scsi_zfcp_failed_show,
653 zfcp_sysfs_scsi_zfcp_failed_store);
654
655 ZFCP_DEFINE_SCSI_ATTR(zfcp_in_recovery, "%d\n",
656 (atomic_read(&zfcp_sdev->status) &
657 ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
658
659 ZFCP_DEFINE_SCSI_ATTR(zfcp_status, "0x%08x\n",
660 atomic_read(&zfcp_sdev->status));
661
662 struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
663 &dev_attr_fcp_lun,
664 &dev_attr_wwpn,
665 &dev_attr_hba_id,
666 &dev_attr_read_latency,
667 &dev_attr_write_latency,
668 &dev_attr_cmd_latency,
669 &dev_attr_zfcp_access_denied,
670 &dev_attr_zfcp_failed,
671 &dev_attr_zfcp_in_recovery,
672 &dev_attr_zfcp_status,
673 NULL
674 };
675
676 static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
677 struct device_attribute *attr,
678 char *buf)
679 {
680 struct Scsi_Host *scsi_host = dev_to_shost(dev);
681 struct fsf_qtcb_bottom_port *qtcb_port;
682 struct zfcp_adapter *adapter;
683 int retval;
684
685 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
686 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
687 return -EOPNOTSUPP;
688
689 qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
690 if (!qtcb_port)
691 return -ENOMEM;
692
693 retval = zfcp_fsf_exchange_port_data_sync(adapter->qdio, qtcb_port);
694 if (retval == 0 || retval == -EAGAIN)
695 retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
696 qtcb_port->cb_util, qtcb_port->a_util);
697 kfree(qtcb_port);
698 return retval;
699 }
700 static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
701
702 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
703 struct fsf_statistics_info *stat_inf)
704 {
705 struct Scsi_Host *scsi_host = dev_to_shost(dev);
706 struct fsf_qtcb_bottom_config *qtcb_config;
707 struct zfcp_adapter *adapter;
708 int retval;
709
710 adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
711 if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
712 return -EOPNOTSUPP;
713
714 qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
715 GFP_KERNEL);
716 if (!qtcb_config)
717 return -ENOMEM;
718
719 retval = zfcp_fsf_exchange_config_data_sync(adapter->qdio, qtcb_config);
720 if (retval == 0 || retval == -EAGAIN)
721 *stat_inf = qtcb_config->stat_info;
722
723 kfree(qtcb_config);
724 return retval;
725 }
726
727 #define ZFCP_SHOST_ATTR(_name, _format, _arg...) \
728 static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, \
729 struct device_attribute *attr,\
730 char *buf) \
731 { \
732 struct fsf_statistics_info stat_info; \
733 int retval; \
734 \
735 retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info); \
736 if (retval) \
737 return retval; \
738 \
739 return sprintf(buf, _format, ## _arg); \
740 } \
741 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
742
743 ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
744 (unsigned long long) stat_info.input_req,
745 (unsigned long long) stat_info.output_req,
746 (unsigned long long) stat_info.control_req);
747
748 ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
749 (unsigned long long) stat_info.input_mb,
750 (unsigned long long) stat_info.output_mb);
751
752 ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
753 (unsigned long long) stat_info.seconds_act);
754
755 static ssize_t zfcp_sysfs_adapter_q_full_show(struct device *dev,
756 struct device_attribute *attr,
757 char *buf)
758 {
759 struct Scsi_Host *scsi_host = class_to_shost(dev);
760 struct zfcp_qdio *qdio =
761 ((struct zfcp_adapter *) scsi_host->hostdata[0])->qdio;
762 u64 util;
763
764 spin_lock_bh(&qdio->stat_lock);
765 util = qdio->req_q_util;
766 spin_unlock_bh(&qdio->stat_lock);
767
768 return sprintf(buf, "%d %llu\n", atomic_read(&qdio->req_q_full),
769 (unsigned long long)util);
770 }
771 static DEVICE_ATTR(queue_full, S_IRUGO, zfcp_sysfs_adapter_q_full_show, NULL);
772
773 struct device_attribute *zfcp_sysfs_shost_attrs[] = {
774 &dev_attr_utilization,
775 &dev_attr_requests,
776 &dev_attr_megabytes,
777 &dev_attr_seconds_active,
778 &dev_attr_queue_full,
779 NULL
780 };
781
782 static ssize_t zfcp_sysfs_adapter_diag_b2b_credit_show(
783 struct device *dev, struct device_attribute *attr, char *buf)
784 {
785 struct zfcp_adapter *adapter = zfcp_ccw_adapter_by_cdev(to_ccwdev(dev));
786 struct zfcp_diag_header *diag_hdr;
787 struct fc_els_flogi *nsp;
788 ssize_t rc = -ENOLINK;
789 unsigned long flags;
790 unsigned int status;
791
792 if (!adapter)
793 return -ENODEV;
794
795 status = atomic_read(&adapter->status);
796 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) ||
797 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) ||
798 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED))
799 goto out;
800
801 diag_hdr = &adapter->diagnostics->config_data.header;
802
803 rc = zfcp_diag_update_buffer_limited(
804 adapter, diag_hdr, zfcp_diag_update_config_data_buffer);
805 if (rc != 0)
806 goto out;
807
808 spin_lock_irqsave(&diag_hdr->access_lock, flags);
809 /* nport_serv_param doesn't contain the ELS_Command code */
810 nsp = (struct fc_els_flogi *)((unsigned long)
811 adapter->diagnostics->config_data
812 .data.nport_serv_param -
813 sizeof(u32));
814
815 rc = scnprintf(buf, 5 + 2, "%hu\n",
816 be16_to_cpu(nsp->fl_csp.sp_bb_cred));
817 spin_unlock_irqrestore(&diag_hdr->access_lock, flags);
818
819 out:
820 zfcp_ccw_adapter_put(adapter);
821 return rc;
822 }
823 static ZFCP_DEV_ATTR(adapter_diag, b2b_credit, 0400,
824 zfcp_sysfs_adapter_diag_b2b_credit_show, NULL);
825
826 #define ZFCP_DEFINE_DIAG_SFP_ATTR(_name, _qtcb_member, _prtsize, _prtfmt) \
827 static ssize_t zfcp_sysfs_adapter_diag_sfp_##_name##_show( \
828 struct device *dev, struct device_attribute *attr, char *buf) \
829 { \
830 struct zfcp_adapter *const adapter = \
831 zfcp_ccw_adapter_by_cdev(to_ccwdev(dev)); \
832 struct zfcp_diag_header *diag_hdr; \
833 ssize_t rc = -ENOLINK; \
834 unsigned long flags; \
835 unsigned int status; \
836 \
837 if (!adapter) \
838 return -ENODEV; \
839 \
840 status = atomic_read(&adapter->status); \
841 if (0 == (status & ZFCP_STATUS_COMMON_OPEN) || \
842 0 == (status & ZFCP_STATUS_COMMON_UNBLOCKED) || \
843 0 != (status & ZFCP_STATUS_COMMON_ERP_FAILED)) \
844 goto out; \
845 \
846 if (!zfcp_diag_support_sfp(adapter)) { \
847 rc = -EOPNOTSUPP; \
848 goto out; \
849 } \
850 \
851 diag_hdr = &adapter->diagnostics->port_data.header; \
852 \
853 rc = zfcp_diag_update_buffer_limited( \
854 adapter, diag_hdr, zfcp_diag_update_port_data_buffer); \
855 if (rc != 0) \
856 goto out; \
857 \
858 spin_lock_irqsave(&diag_hdr->access_lock, flags); \
859 rc = scnprintf( \
860 buf, (_prtsize) + 2, _prtfmt "\n", \
861 adapter->diagnostics->port_data.data._qtcb_member); \
862 spin_unlock_irqrestore(&diag_hdr->access_lock, flags); \
863 \
864 out: \
865 zfcp_ccw_adapter_put(adapter); \
866 return rc; \
867 } \
868 static ZFCP_DEV_ATTR(adapter_diag_sfp, _name, 0400, \
869 zfcp_sysfs_adapter_diag_sfp_##_name##_show, NULL)
870
871 ZFCP_DEFINE_DIAG_SFP_ATTR(temperature, temperature, 6, "%hd");
872 ZFCP_DEFINE_DIAG_SFP_ATTR(vcc, vcc, 5, "%hu");
873 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_bias, tx_bias, 5, "%hu");
874 ZFCP_DEFINE_DIAG_SFP_ATTR(tx_power, tx_power, 5, "%hu");
875 ZFCP_DEFINE_DIAG_SFP_ATTR(rx_power, rx_power, 5, "%hu");
876 ZFCP_DEFINE_DIAG_SFP_ATTR(port_tx_type, sfp_flags.port_tx_type, 2, "%hu");
877 ZFCP_DEFINE_DIAG_SFP_ATTR(optical_port, sfp_flags.optical_port, 1, "%hu");
878 ZFCP_DEFINE_DIAG_SFP_ATTR(sfp_invalid, sfp_flags.sfp_invalid, 1, "%hu");
879 ZFCP_DEFINE_DIAG_SFP_ATTR(connector_type, sfp_flags.connector_type, 1, "%hu");
880 ZFCP_DEFINE_DIAG_SFP_ATTR(fec_active, sfp_flags.fec_active, 1, "%hu");
881
882 static struct attribute *zfcp_sysfs_diag_attrs[] = {
883 &dev_attr_adapter_diag_sfp_temperature.attr,
884 &dev_attr_adapter_diag_sfp_vcc.attr,
885 &dev_attr_adapter_diag_sfp_tx_bias.attr,
886 &dev_attr_adapter_diag_sfp_tx_power.attr,
887 &dev_attr_adapter_diag_sfp_rx_power.attr,
888 &dev_attr_adapter_diag_sfp_port_tx_type.attr,
889 &dev_attr_adapter_diag_sfp_optical_port.attr,
890 &dev_attr_adapter_diag_sfp_sfp_invalid.attr,
891 &dev_attr_adapter_diag_sfp_connector_type.attr,
892 &dev_attr_adapter_diag_sfp_fec_active.attr,
893 &dev_attr_adapter_diag_b2b_credit.attr,
894 NULL,
895 };
896
897 const struct attribute_group zfcp_sysfs_diag_attr_group = {
898 .name = "diagnostics",
899 .attrs = zfcp_sysfs_diag_attrs,
900 };
Linux with added FPC-III support