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8
9#define KMSG_COMPONENT "zfcp"
10#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
11
12#include "zfcp_ext.h"
13
14#define ZFCP_MAX_ERPS 3
15
16enum zfcp_erp_act_flags {
17 ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000,
18 ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000,
19 ZFCP_STATUS_ERP_DISMISSING = 0x00100000,
20 ZFCP_STATUS_ERP_DISMISSED = 0x00200000,
21 ZFCP_STATUS_ERP_LOWMEM = 0x00400000,
22};
23
24enum zfcp_erp_steps {
25 ZFCP_ERP_STEP_UNINITIALIZED = 0x0000,
26 ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001,
27 ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010,
28 ZFCP_ERP_STEP_PORT_CLOSING = 0x0100,
29 ZFCP_ERP_STEP_NAMESERVER_LOOKUP = 0x0400,
30 ZFCP_ERP_STEP_PORT_OPENING = 0x0800,
31 ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000,
32 ZFCP_ERP_STEP_UNIT_OPENING = 0x2000,
33};
34
35enum zfcp_erp_act_type {
36 ZFCP_ERP_ACTION_REOPEN_UNIT = 1,
37 ZFCP_ERP_ACTION_REOPEN_PORT = 2,
38 ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3,
39 ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4,
40};
41
42enum zfcp_erp_act_state {
43 ZFCP_ERP_ACTION_RUNNING = 1,
44 ZFCP_ERP_ACTION_READY = 2,
45};
46
47enum zfcp_erp_act_result {
48 ZFCP_ERP_SUCCEEDED = 0,
49 ZFCP_ERP_FAILED = 1,
50 ZFCP_ERP_CONTINUES = 2,
51 ZFCP_ERP_EXIT = 3,
52 ZFCP_ERP_DISMISSED = 4,
53 ZFCP_ERP_NOMEM = 5,
54};
55
56static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask)
57{
58 zfcp_erp_modify_adapter_status(adapter, "erablk1", NULL,
59 ZFCP_STATUS_COMMON_UNBLOCKED | mask,
60 ZFCP_CLEAR);
61}
62
63static int zfcp_erp_action_exists(struct zfcp_erp_action *act)
64{
65 struct zfcp_erp_action *curr_act;
66
67 list_for_each_entry(curr_act, &act->adapter->erp_running_head, list)
68 if (act == curr_act)
69 return ZFCP_ERP_ACTION_RUNNING;
70 return 0;
71}
72
73static void zfcp_erp_action_ready(struct zfcp_erp_action *act)
74{
75 struct zfcp_adapter *adapter = act->adapter;
76
77 list_move(&act->list, &act->adapter->erp_ready_head);
78 zfcp_rec_dbf_event_action("erardy1", act);
79 up(&adapter->erp_ready_sem);
80 zfcp_rec_dbf_event_thread("erardy2", adapter);
81}
82
83static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act)
84{
85 act->status |= ZFCP_STATUS_ERP_DISMISSED;
86 if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING)
87 zfcp_erp_action_ready(act);
88}
89
90static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
91{
92 if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
93 zfcp_erp_action_dismiss(&unit->erp_action);
94}
95
96static void zfcp_erp_action_dismiss_port(struct zfcp_port *port)
97{
98 struct zfcp_unit *unit;
99
100 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
101 zfcp_erp_action_dismiss(&port->erp_action);
102 else
103 list_for_each_entry(unit, &port->unit_list_head, list)
104 zfcp_erp_action_dismiss_unit(unit);
105}
106
107static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
108{
109 struct zfcp_port *port;
110
111 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
112 zfcp_erp_action_dismiss(&adapter->erp_action);
113 else
114 list_for_each_entry(port, &adapter->port_list_head, list)
115 zfcp_erp_action_dismiss_port(port);
116}
117
118static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter,
119 struct zfcp_port *port,
120 struct zfcp_unit *unit)
121{
122 int need = want;
123 int u_status, p_status, a_status;
124
125 switch (want) {
126 case ZFCP_ERP_ACTION_REOPEN_UNIT:
127 u_status = atomic_read(&unit->status);
128 if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE)
129 return 0;
130 p_status = atomic_read(&port->status);
131 if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) ||
132 p_status & ZFCP_STATUS_COMMON_ERP_FAILED)
133 return 0;
134 if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED))
135 need = ZFCP_ERP_ACTION_REOPEN_PORT;
136
137 case ZFCP_ERP_ACTION_REOPEN_PORT:
138 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
139 p_status = atomic_read(&port->status);
140 if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE)
141 return 0;
142 a_status = atomic_read(&adapter->status);
143 if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) ||
144 a_status & ZFCP_STATUS_COMMON_ERP_FAILED)
145 return 0;
146 if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED))
147 need = ZFCP_ERP_ACTION_REOPEN_ADAPTER;
148
149 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
150 a_status = atomic_read(&adapter->status);
151 if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE)
152 return 0;
153 }
154
155 return need;
156}
157
158static struct zfcp_erp_action *zfcp_erp_setup_act(int need,
159 struct zfcp_adapter *adapter,
160 struct zfcp_port *port,
161 struct zfcp_unit *unit)
162{
163 struct zfcp_erp_action *erp_action;
164 u32 status = 0;
165
166 switch (need) {
167 case ZFCP_ERP_ACTION_REOPEN_UNIT:
168 zfcp_unit_get(unit);
169 atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
170 erp_action = &unit->erp_action;
171 if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING))
172 status = ZFCP_STATUS_ERP_CLOSE_ONLY;
173 break;
174
175 case ZFCP_ERP_ACTION_REOPEN_PORT:
176 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
177 zfcp_port_get(port);
178 zfcp_erp_action_dismiss_port(port);
179 atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
180 erp_action = &port->erp_action;
181 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING))
182 status = ZFCP_STATUS_ERP_CLOSE_ONLY;
183 break;
184
185 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
186 zfcp_adapter_get(adapter);
187 zfcp_erp_action_dismiss_adapter(adapter);
188 atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status);
189 erp_action = &adapter->erp_action;
190 if (!(atomic_read(&adapter->status) &
191 ZFCP_STATUS_COMMON_RUNNING))
192 status = ZFCP_STATUS_ERP_CLOSE_ONLY;
193 break;
194
195 default:
196 return NULL;
197 }
198
199 memset(erp_action, 0, sizeof(struct zfcp_erp_action));
200 erp_action->adapter = adapter;
201 erp_action->port = port;
202 erp_action->unit = unit;
203 erp_action->action = need;
204 erp_action->status = status;
205
206 return erp_action;
207}
208
209static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter,
210 struct zfcp_port *port,
211 struct zfcp_unit *unit, char *id, void *ref)
212{
213 int retval = 1, need;
214 struct zfcp_erp_action *act = NULL;
215
216 if (!(atomic_read(&adapter->status) &
217 ZFCP_STATUS_ADAPTER_ERP_THREAD_UP))
218 return -EIO;
219
220 need = zfcp_erp_required_act(want, adapter, port, unit);
221 if (!need)
222 goto out;
223
224 atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status);
225 act = zfcp_erp_setup_act(need, adapter, port, unit);
226 if (!act)
227 goto out;
228 ++adapter->erp_total_count;
229 list_add_tail(&act->list, &adapter->erp_ready_head);
230 up(&adapter->erp_ready_sem);
231 zfcp_rec_dbf_event_thread("eracte1", adapter);
232 retval = 0;
233 out:
234 zfcp_rec_dbf_event_trigger(id, ref, want, need, act,
235 adapter, port, unit);
236 return retval;
237}
238
239static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter,
240 int clear_mask, char *id, void *ref)
241{
242 zfcp_erp_adapter_block(adapter, clear_mask);
243 zfcp_scsi_schedule_rports_block(adapter);
244
245
246 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
247 zfcp_erp_adapter_failed(adapter, "erareo1", NULL);
248 return -EIO;
249 }
250 return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER,
251 adapter, NULL, NULL, id, ref);
252}
253
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255
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257
258
259
260
261void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear,
262 char *id, void *ref)
263{
264 unsigned long flags;
265
266 read_lock_irqsave(&zfcp_data.config_lock, flags);
267 write_lock(&adapter->erp_lock);
268 _zfcp_erp_adapter_reopen(adapter, clear, id, ref);
269 write_unlock(&adapter->erp_lock);
270 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
271}
272
273
274
275
276
277
278
279
280void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear,
281 char *id, void *ref)
282{
283 int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
284 zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref);
285}
286
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289
290
291
292
293
294void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *id,
295 void *ref)
296{
297 int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
298 zfcp_erp_port_reopen(port, clear | flags, id, ref);
299}
300
301
302
303
304
305
306
307
308void zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear, char *id,
309 void *ref)
310{
311 int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
312 zfcp_erp_unit_reopen(unit, clear | flags, id, ref);
313}
314
315static void zfcp_erp_port_block(struct zfcp_port *port, int clear)
316{
317 zfcp_erp_modify_port_status(port, "erpblk1", NULL,
318 ZFCP_STATUS_COMMON_UNBLOCKED | clear,
319 ZFCP_CLEAR);
320}
321
322static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port,
323 int clear, char *id, void *ref)
324{
325 zfcp_erp_port_block(port, clear);
326 zfcp_scsi_schedule_rport_block(port);
327
328 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
329 return;
330
331 zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
332 port->adapter, port, NULL, id, ref);
333}
334
335
336
337
338
339
340
341void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, char *id,
342 void *ref)
343{
344 unsigned long flags;
345 struct zfcp_adapter *adapter = port->adapter;
346
347 read_lock_irqsave(&zfcp_data.config_lock, flags);
348 write_lock(&adapter->erp_lock);
349 _zfcp_erp_port_forced_reopen(port, clear, id, ref);
350 write_unlock(&adapter->erp_lock);
351 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
352}
353
354static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id,
355 void *ref)
356{
357 zfcp_erp_port_block(port, clear);
358 zfcp_scsi_schedule_rport_block(port);
359
360 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
361
362 zfcp_erp_port_failed(port, "erpreo1", NULL);
363 return -EIO;
364 }
365
366 return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
367 port->adapter, port, NULL, id, ref);
368}
369
370
371
372
373
374
375
376
377int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id, void *ref)
378{
379 unsigned long flags;
380 int retval;
381 struct zfcp_adapter *adapter = port->adapter;
382
383 read_lock_irqsave(&zfcp_data.config_lock, flags);
384 write_lock(&adapter->erp_lock);
385 retval = _zfcp_erp_port_reopen(port, clear, id, ref);
386 write_unlock(&adapter->erp_lock);
387 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
388
389 return retval;
390}
391
392static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask)
393{
394 zfcp_erp_modify_unit_status(unit, "erublk1", NULL,
395 ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
396 ZFCP_CLEAR);
397}
398
399static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, char *id,
400 void *ref)
401{
402 struct zfcp_adapter *adapter = unit->port->adapter;
403
404 zfcp_erp_unit_block(unit, clear);
405
406 if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
407 return;
408
409 zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT,
410 adapter, unit->port, unit, id, ref);
411}
412
413
414
415
416
417
418
419void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, char *id,
420 void *ref)
421{
422 unsigned long flags;
423 struct zfcp_port *port = unit->port;
424 struct zfcp_adapter *adapter = port->adapter;
425
426 read_lock_irqsave(&zfcp_data.config_lock, flags);
427 write_lock(&adapter->erp_lock);
428 _zfcp_erp_unit_reopen(unit, clear, id, ref);
429 write_unlock(&adapter->erp_lock);
430 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
431}
432
433static int status_change_set(unsigned long mask, atomic_t *status)
434{
435 return (atomic_read(status) ^ mask) & mask;
436}
437
438static int status_change_clear(unsigned long mask, atomic_t *status)
439{
440 return atomic_read(status) & mask;
441}
442
443static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
444{
445 if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status))
446 zfcp_rec_dbf_event_adapter("eraubl1", NULL, adapter);
447 atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status);
448}
449
450static void zfcp_erp_port_unblock(struct zfcp_port *port)
451{
452 if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status))
453 zfcp_rec_dbf_event_port("erpubl1", NULL, port);
454 atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status);
455}
456
457static void zfcp_erp_unit_unblock(struct zfcp_unit *unit)
458{
459 if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))
460 zfcp_rec_dbf_event_unit("eruubl1", NULL, unit);
461 atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status);
462}
463
464static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action)
465{
466 list_move(&erp_action->list, &erp_action->adapter->erp_running_head);
467 zfcp_rec_dbf_event_action("erator1", erp_action);
468}
469
470static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act)
471{
472 struct zfcp_adapter *adapter = act->adapter;
473
474 if (!act->fsf_req)
475 return;
476
477 spin_lock(&adapter->req_list_lock);
478 if (zfcp_reqlist_find_safe(adapter, act->fsf_req) &&
479 act->fsf_req->erp_action == act) {
480 if (act->status & (ZFCP_STATUS_ERP_DISMISSED |
481 ZFCP_STATUS_ERP_TIMEDOUT)) {
482 act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
483 zfcp_rec_dbf_event_action("erscf_1", act);
484 act->fsf_req->erp_action = NULL;
485 }
486 if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
487 zfcp_rec_dbf_event_action("erscf_2", act);
488 if (act->fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED |
489 ZFCP_STATUS_FSFREQ_DISMISSED))
490 act->fsf_req = NULL;
491 } else
492 act->fsf_req = NULL;
493 spin_unlock(&adapter->req_list_lock);
494}
495
496
497
498
499
500
501void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask)
502{
503 struct zfcp_adapter *adapter = erp_action->adapter;
504 unsigned long flags;
505
506 write_lock_irqsave(&adapter->erp_lock, flags);
507 if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) {
508 erp_action->status |= set_mask;
509 zfcp_erp_action_ready(erp_action);
510 }
511 write_unlock_irqrestore(&adapter->erp_lock, flags);
512}
513
514
515
516
517
518void zfcp_erp_timeout_handler(unsigned long data)
519{
520 struct zfcp_erp_action *act = (struct zfcp_erp_action *) data;
521 zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT);
522}
523
524static void zfcp_erp_memwait_handler(unsigned long data)
525{
526 zfcp_erp_notify((struct zfcp_erp_action *)data, 0);
527}
528
529static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
530{
531 init_timer(&erp_action->timer);
532 erp_action->timer.function = zfcp_erp_memwait_handler;
533 erp_action->timer.data = (unsigned long) erp_action;
534 erp_action->timer.expires = jiffies + HZ;
535 add_timer(&erp_action->timer);
536}
537
538static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
539 int clear, char *id, void *ref)
540{
541 struct zfcp_port *port;
542
543 list_for_each_entry(port, &adapter->port_list_head, list)
544 _zfcp_erp_port_reopen(port, clear, id, ref);
545}
546
547static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear,
548 char *id, void *ref)
549{
550 struct zfcp_unit *unit;
551
552 list_for_each_entry(unit, &port->unit_list_head, list)
553 _zfcp_erp_unit_reopen(unit, clear, id, ref);
554}
555
556static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act)
557{
558 struct zfcp_adapter *adapter = act->adapter;
559 struct zfcp_port *port = act->port;
560 struct zfcp_unit *unit = act->unit;
561 u32 status = act->status;
562
563
564 switch (act->action) {
565
566 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
567 if (status == ZFCP_ERP_SUCCEEDED)
568 _zfcp_erp_port_reopen_all(adapter, 0, "ersfa_1", NULL);
569 else
570 _zfcp_erp_adapter_reopen(adapter, 0, "ersfa_2", NULL);
571 break;
572
573 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
574 if (status == ZFCP_ERP_SUCCEEDED)
575 _zfcp_erp_port_reopen(port, 0, "ersfa_3", NULL);
576 else
577 _zfcp_erp_adapter_reopen(adapter, 0, "ersfa_4", NULL);
578 break;
579
580 case ZFCP_ERP_ACTION_REOPEN_PORT:
581 if (status == ZFCP_ERP_SUCCEEDED)
582 _zfcp_erp_unit_reopen_all(port, 0, "ersfa_5", NULL);
583 else
584 _zfcp_erp_port_forced_reopen(port, 0, "ersfa_6", NULL);
585 break;
586
587 case ZFCP_ERP_ACTION_REOPEN_UNIT:
588 if (status != ZFCP_ERP_SUCCEEDED)
589 _zfcp_erp_port_reopen(unit->port, 0, "ersfa_7", NULL);
590 break;
591 }
592}
593
594static void zfcp_erp_wakeup(struct zfcp_adapter *adapter)
595{
596 unsigned long flags;
597
598 read_lock_irqsave(&zfcp_data.config_lock, flags);
599 read_lock(&adapter->erp_lock);
600 if (list_empty(&adapter->erp_ready_head) &&
601 list_empty(&adapter->erp_running_head)) {
602 atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
603 &adapter->status);
604 wake_up(&adapter->erp_done_wqh);
605 }
606 read_unlock(&adapter->erp_lock);
607 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
608}
609
610static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act)
611{
612 if (zfcp_qdio_open(act->adapter))
613 return ZFCP_ERP_FAILED;
614 init_waitqueue_head(&act->adapter->request_wq);
615 atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status);
616 return ZFCP_ERP_SUCCEEDED;
617}
618
619static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter)
620{
621 struct zfcp_port *port;
622 port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
623 adapter->peer_d_id);
624 if (IS_ERR(port))
625 return;
626 _zfcp_erp_port_reopen(port, 0, "ereptp1", NULL);
627}
628
629static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action)
630{
631 int retries;
632 int sleep = 1;
633 struct zfcp_adapter *adapter = erp_action->adapter;
634
635 atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
636
637 for (retries = 7; retries; retries--) {
638 atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
639 &adapter->status);
640 write_lock_irq(&adapter->erp_lock);
641 zfcp_erp_action_to_running(erp_action);
642 write_unlock_irq(&adapter->erp_lock);
643 if (zfcp_fsf_exchange_config_data(erp_action)) {
644 atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
645 &adapter->status);
646 return ZFCP_ERP_FAILED;
647 }
648
649 zfcp_rec_dbf_event_thread_lock("erasfx1", adapter);
650 down(&adapter->erp_ready_sem);
651 zfcp_rec_dbf_event_thread_lock("erasfx2", adapter);
652 if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
653 break;
654
655 if (!(atomic_read(&adapter->status) &
656 ZFCP_STATUS_ADAPTER_HOST_CON_INIT))
657 break;
658
659 ssleep(sleep);
660 sleep *= 2;
661 }
662
663 atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
664 &adapter->status);
665
666 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK))
667 return ZFCP_ERP_FAILED;
668
669 if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
670 zfcp_erp_enqueue_ptp_port(adapter);
671
672 return ZFCP_ERP_SUCCEEDED;
673}
674
675static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act)
676{
677 int ret;
678 struct zfcp_adapter *adapter = act->adapter;
679
680 write_lock_irq(&adapter->erp_lock);
681 zfcp_erp_action_to_running(act);
682 write_unlock_irq(&adapter->erp_lock);
683
684 ret = zfcp_fsf_exchange_port_data(act);
685 if (ret == -EOPNOTSUPP)
686 return ZFCP_ERP_SUCCEEDED;
687 if (ret)
688 return ZFCP_ERP_FAILED;
689
690 zfcp_rec_dbf_event_thread_lock("erasox1", adapter);
691 down(&adapter->erp_ready_sem);
692 zfcp_rec_dbf_event_thread_lock("erasox2", adapter);
693 if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
694 return ZFCP_ERP_FAILED;
695
696 return ZFCP_ERP_SUCCEEDED;
697}
698
699static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
700{
701 if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED)
702 return ZFCP_ERP_FAILED;
703
704 if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED)
705 return ZFCP_ERP_FAILED;
706
707 atomic_set(&act->adapter->stat_miss, 16);
708 if (zfcp_status_read_refill(act->adapter))
709 return ZFCP_ERP_FAILED;
710
711 return ZFCP_ERP_SUCCEEDED;
712}
713
714static void zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *act)
715{
716 struct zfcp_adapter *adapter = act->adapter;
717
718
719 zfcp_qdio_close(adapter);
720 zfcp_fsf_req_dismiss_all(adapter);
721 adapter->fsf_req_seq_no = 0;
722 zfcp_fc_wka_port_force_offline(&adapter->nsp);
723
724 zfcp_erp_modify_adapter_status(adapter, "erascl1", NULL,
725 ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
726
727 atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
728 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
729}
730
731static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *act)
732{
733 struct zfcp_adapter *adapter = act->adapter;
734
735 if (zfcp_erp_adapter_strategy_open_qdio(act)) {
736 atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
737 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
738 &adapter->status);
739 return ZFCP_ERP_FAILED;
740 }
741
742 if (zfcp_erp_adapter_strategy_open_fsf(act)) {
743 zfcp_erp_adapter_strategy_close(act);
744 return ZFCP_ERP_FAILED;
745 }
746
747 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &adapter->status);
748
749 return ZFCP_ERP_SUCCEEDED;
750}
751
752static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act)
753{
754 struct zfcp_adapter *adapter = act->adapter;
755
756 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN) {
757 zfcp_erp_adapter_strategy_close(act);
758 if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
759 return ZFCP_ERP_EXIT;
760 }
761
762 if (zfcp_erp_adapter_strategy_open(act)) {
763 ssleep(8);
764 return ZFCP_ERP_FAILED;
765 }
766
767 return ZFCP_ERP_SUCCEEDED;
768}
769
770static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act)
771{
772 int retval;
773
774 retval = zfcp_fsf_close_physical_port(act);
775 if (retval == -ENOMEM)
776 return ZFCP_ERP_NOMEM;
777 act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING;
778 if (retval)
779 return ZFCP_ERP_FAILED;
780
781 return ZFCP_ERP_CONTINUES;
782}
783
784static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)
785{
786 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status);
787}
788
789static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
790{
791 struct zfcp_port *port = erp_action->port;
792 int status = atomic_read(&port->status);
793
794 switch (erp_action->step) {
795 case ZFCP_ERP_STEP_UNINITIALIZED:
796 zfcp_erp_port_strategy_clearstati(port);
797 if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) &&
798 (status & ZFCP_STATUS_COMMON_OPEN))
799 return zfcp_erp_port_forced_strategy_close(erp_action);
800 else
801 return ZFCP_ERP_FAILED;
802
803 case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
804 if (status & ZFCP_STATUS_PORT_PHYS_OPEN)
805 return ZFCP_ERP_SUCCEEDED;
806 }
807 return ZFCP_ERP_FAILED;
808}
809
810static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action)
811{
812 int retval;
813
814 retval = zfcp_fsf_close_port(erp_action);
815 if (retval == -ENOMEM)
816 return ZFCP_ERP_NOMEM;
817 erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING;
818 if (retval)
819 return ZFCP_ERP_FAILED;
820 return ZFCP_ERP_CONTINUES;
821}
822
823static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action)
824{
825 int retval;
826
827 retval = zfcp_fsf_open_port(erp_action);
828 if (retval == -ENOMEM)
829 return ZFCP_ERP_NOMEM;
830 erp_action->step = ZFCP_ERP_STEP_PORT_OPENING;
831 if (retval)
832 return ZFCP_ERP_FAILED;
833 return ZFCP_ERP_CONTINUES;
834}
835
836static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
837{
838 struct zfcp_adapter *adapter = act->adapter;
839 struct zfcp_port *port = act->port;
840
841 if (port->wwpn != adapter->peer_wwpn) {
842 zfcp_erp_port_failed(port, "eroptp1", NULL);
843 return ZFCP_ERP_FAILED;
844 }
845 port->d_id = adapter->peer_d_id;
846 return zfcp_erp_port_strategy_open_port(act);
847}
848
849void zfcp_erp_port_strategy_open_lookup(struct work_struct *work)
850{
851 int retval;
852 struct zfcp_port *port = container_of(work, struct zfcp_port,
853 gid_pn_work);
854
855 retval = zfcp_fc_ns_gid_pn(&port->erp_action);
856 if (retval == -ENOMEM)
857 zfcp_erp_notify(&port->erp_action, ZFCP_ERP_NOMEM);
858 port->erp_action.step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
859 if (retval)
860 zfcp_erp_notify(&port->erp_action, ZFCP_ERP_FAILED);
861 zfcp_port_put(port);
862}
863
864static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
865{
866 struct zfcp_adapter *adapter = act->adapter;
867 struct zfcp_port *port = act->port;
868 int p_status = atomic_read(&port->status);
869
870 switch (act->step) {
871 case ZFCP_ERP_STEP_UNINITIALIZED:
872 case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
873 case ZFCP_ERP_STEP_PORT_CLOSING:
874 if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
875 return zfcp_erp_open_ptp_port(act);
876 if (!port->d_id) {
877 zfcp_port_get(port);
878 if (!queue_work(zfcp_data.work_queue,
879 &port->gid_pn_work))
880 zfcp_port_put(port);
881 return ZFCP_ERP_CONTINUES;
882 }
883 case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
884 if (!port->d_id)
885 return ZFCP_ERP_FAILED;
886 return zfcp_erp_port_strategy_open_port(act);
887
888 case ZFCP_ERP_STEP_PORT_OPENING:
889
890 if (p_status & ZFCP_STATUS_COMMON_OPEN) {
891 if (port->d_id)
892 return ZFCP_ERP_SUCCEEDED;
893 else {
894 act->step = ZFCP_ERP_STEP_PORT_CLOSING;
895 return ZFCP_ERP_CONTINUES;
896 }
897
898 }
899 }
900 return ZFCP_ERP_FAILED;
901}
902
903static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action)
904{
905 struct zfcp_port *port = erp_action->port;
906
907 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)
908 goto close_init_done;
909
910 switch (erp_action->step) {
911 case ZFCP_ERP_STEP_UNINITIALIZED:
912 zfcp_erp_port_strategy_clearstati(port);
913 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)
914 return zfcp_erp_port_strategy_close(erp_action);
915 break;
916
917 case ZFCP_ERP_STEP_PORT_CLOSING:
918 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)
919 return ZFCP_ERP_FAILED;
920 break;
921 }
922
923close_init_done:
924 if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
925 return ZFCP_ERP_EXIT;
926
927 return zfcp_erp_port_strategy_open_common(erp_action);
928}
929
930static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit)
931{
932 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
933 ZFCP_STATUS_UNIT_SHARED |
934 ZFCP_STATUS_UNIT_READONLY,
935 &unit->status);
936}
937
938static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action)
939{
940 int retval = zfcp_fsf_close_unit(erp_action);
941 if (retval == -ENOMEM)
942 return ZFCP_ERP_NOMEM;
943 erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING;
944 if (retval)
945 return ZFCP_ERP_FAILED;
946 return ZFCP_ERP_CONTINUES;
947}
948
949static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action)
950{
951 int retval = zfcp_fsf_open_unit(erp_action);
952 if (retval == -ENOMEM)
953 return ZFCP_ERP_NOMEM;
954 erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING;
955 if (retval)
956 return ZFCP_ERP_FAILED;
957 return ZFCP_ERP_CONTINUES;
958}
959
960static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action)
961{
962 struct zfcp_unit *unit = erp_action->unit;
963
964 switch (erp_action->step) {
965 case ZFCP_ERP_STEP_UNINITIALIZED:
966 zfcp_erp_unit_strategy_clearstati(unit);
967 if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
968 return zfcp_erp_unit_strategy_close(erp_action);
969
970 case ZFCP_ERP_STEP_UNIT_CLOSING:
971 if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
972 return ZFCP_ERP_FAILED;
973 if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
974 return ZFCP_ERP_EXIT;
975 return zfcp_erp_unit_strategy_open(erp_action);
976
977 case ZFCP_ERP_STEP_UNIT_OPENING:
978 if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
979 return ZFCP_ERP_SUCCEEDED;
980 }
981 return ZFCP_ERP_FAILED;
982}
983
984static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result)
985{
986 switch (result) {
987 case ZFCP_ERP_SUCCEEDED :
988 atomic_set(&unit->erp_counter, 0);
989 zfcp_erp_unit_unblock(unit);
990 break;
991 case ZFCP_ERP_FAILED :
992 atomic_inc(&unit->erp_counter);
993 if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) {
994 dev_err(&unit->port->adapter->ccw_device->dev,
995 "ERP failed for unit 0x%016Lx on "
996 "port 0x%016Lx\n",
997 (unsigned long long)unit->fcp_lun,
998 (unsigned long long)unit->port->wwpn);
999 zfcp_erp_unit_failed(unit, "erusck1", NULL);
1000 }
1001 break;
1002 }
1003
1004 if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
1005 zfcp_erp_unit_block(unit, 0);
1006 result = ZFCP_ERP_EXIT;
1007 }
1008 return result;
1009}
1010
1011static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
1012{
1013 switch (result) {
1014 case ZFCP_ERP_SUCCEEDED :
1015 atomic_set(&port->erp_counter, 0);
1016 zfcp_erp_port_unblock(port);
1017 break;
1018
1019 case ZFCP_ERP_FAILED :
1020 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) {
1021 zfcp_erp_port_block(port, 0);
1022 result = ZFCP_ERP_EXIT;
1023 }
1024 atomic_inc(&port->erp_counter);
1025 if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) {
1026 dev_err(&port->adapter->ccw_device->dev,
1027 "ERP failed for remote port 0x%016Lx\n",
1028 (unsigned long long)port->wwpn);
1029 zfcp_erp_port_failed(port, "erpsck1", NULL);
1030 }
1031 break;
1032 }
1033
1034 if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
1035 zfcp_erp_port_block(port, 0);
1036 result = ZFCP_ERP_EXIT;
1037 }
1038 return result;
1039}
1040
1041static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter,
1042 int result)
1043{
1044 switch (result) {
1045 case ZFCP_ERP_SUCCEEDED :
1046 atomic_set(&adapter->erp_counter, 0);
1047 zfcp_erp_adapter_unblock(adapter);
1048 break;
1049
1050 case ZFCP_ERP_FAILED :
1051 atomic_inc(&adapter->erp_counter);
1052 if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) {
1053 dev_err(&adapter->ccw_device->dev,
1054 "ERP cannot recover an error "
1055 "on the FCP device\n");
1056 zfcp_erp_adapter_failed(adapter, "erasck1", NULL);
1057 }
1058 break;
1059 }
1060
1061 if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
1062 zfcp_erp_adapter_block(adapter, 0);
1063 result = ZFCP_ERP_EXIT;
1064 }
1065 return result;
1066}
1067
1068static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action,
1069 int result)
1070{
1071 struct zfcp_adapter *adapter = erp_action->adapter;
1072 struct zfcp_port *port = erp_action->port;
1073 struct zfcp_unit *unit = erp_action->unit;
1074
1075 switch (erp_action->action) {
1076
1077 case ZFCP_ERP_ACTION_REOPEN_UNIT:
1078 result = zfcp_erp_strategy_check_unit(unit, result);
1079 break;
1080
1081 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
1082 case ZFCP_ERP_ACTION_REOPEN_PORT:
1083 result = zfcp_erp_strategy_check_port(port, result);
1084 break;
1085
1086 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
1087 result = zfcp_erp_strategy_check_adapter(adapter, result);
1088 break;
1089 }
1090 return result;
1091}
1092
1093static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status)
1094{
1095 int status = atomic_read(target_status);
1096
1097 if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
1098 (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
1099 return 1;
1100
1101 if (!(status & ZFCP_STATUS_COMMON_RUNNING) &&
1102 !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
1103 return 1;
1104
1105 return 0;
1106}
1107
1108static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
1109{
1110 int action = act->action;
1111 struct zfcp_adapter *adapter = act->adapter;
1112 struct zfcp_port *port = act->port;
1113 struct zfcp_unit *unit = act->unit;
1114 u32 erp_status = act->status;
1115
1116 switch (action) {
1117 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
1118 if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) {
1119 _zfcp_erp_adapter_reopen(adapter,
1120 ZFCP_STATUS_COMMON_ERP_FAILED,
1121 "ersscg1", NULL);
1122 return ZFCP_ERP_EXIT;
1123 }
1124 break;
1125
1126 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
1127 case ZFCP_ERP_ACTION_REOPEN_PORT:
1128 if (zfcp_erp_strat_change_det(&port->status, erp_status)) {
1129 _zfcp_erp_port_reopen(port,
1130 ZFCP_STATUS_COMMON_ERP_FAILED,
1131 "ersscg2", NULL);
1132 return ZFCP_ERP_EXIT;
1133 }
1134 break;
1135
1136 case ZFCP_ERP_ACTION_REOPEN_UNIT:
1137 if (zfcp_erp_strat_change_det(&unit->status, erp_status)) {
1138 _zfcp_erp_unit_reopen(unit,
1139 ZFCP_STATUS_COMMON_ERP_FAILED,
1140 "ersscg3", NULL);
1141 return ZFCP_ERP_EXIT;
1142 }
1143 break;
1144 }
1145 return ret;
1146}
1147
1148static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
1149{
1150 struct zfcp_adapter *adapter = erp_action->adapter;
1151
1152 adapter->erp_total_count--;
1153 if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
1154 adapter->erp_low_mem_count--;
1155 erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
1156 }
1157
1158 list_del(&erp_action->list);
1159 zfcp_rec_dbf_event_action("eractd1", erp_action);
1160
1161 switch (erp_action->action) {
1162 case ZFCP_ERP_ACTION_REOPEN_UNIT:
1163 atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
1164 &erp_action->unit->status);
1165 break;
1166
1167 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
1168 case ZFCP_ERP_ACTION_REOPEN_PORT:
1169 atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
1170 &erp_action->port->status);
1171 break;
1172
1173 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
1174 atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
1175 &erp_action->adapter->status);
1176 break;
1177 }
1178}
1179
1180static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
1181{
1182 struct zfcp_adapter *adapter = act->adapter;
1183 struct zfcp_port *port = act->port;
1184 struct zfcp_unit *unit = act->unit;
1185
1186 switch (act->action) {
1187 case ZFCP_ERP_ACTION_REOPEN_UNIT:
1188 if ((result == ZFCP_ERP_SUCCEEDED) && !unit->device) {
1189 zfcp_unit_get(unit);
1190 if (scsi_queue_work(unit->port->adapter->scsi_host,
1191 &unit->scsi_work) <= 0)
1192 zfcp_unit_put(unit);
1193 }
1194 zfcp_unit_put(unit);
1195 break;
1196
1197 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
1198 case ZFCP_ERP_ACTION_REOPEN_PORT:
1199 if (result == ZFCP_ERP_SUCCEEDED)
1200 zfcp_scsi_schedule_rport_register(port);
1201 zfcp_port_put(port);
1202 break;
1203
1204 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
1205 if (result == ZFCP_ERP_SUCCEEDED) {
1206 register_service_level(&adapter->service_level);
1207 schedule_work(&adapter->scan_work);
1208 } else
1209 unregister_service_level(&adapter->service_level);
1210 zfcp_adapter_put(adapter);
1211 break;
1212 }
1213}
1214
1215static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
1216{
1217 switch (erp_action->action) {
1218 case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
1219 return zfcp_erp_adapter_strategy(erp_action);
1220 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
1221 return zfcp_erp_port_forced_strategy(erp_action);
1222 case ZFCP_ERP_ACTION_REOPEN_PORT:
1223 return zfcp_erp_port_strategy(erp_action);
1224 case ZFCP_ERP_ACTION_REOPEN_UNIT:
1225 return zfcp_erp_unit_strategy(erp_action);
1226 }
1227 return ZFCP_ERP_FAILED;
1228}
1229
1230static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
1231{
1232 int retval;
1233 struct zfcp_adapter *adapter = erp_action->adapter;
1234 unsigned long flags;
1235
1236 read_lock_irqsave(&zfcp_data.config_lock, flags);
1237 write_lock(&adapter->erp_lock);
1238
1239 zfcp_erp_strategy_check_fsfreq(erp_action);
1240
1241 if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
1242 zfcp_erp_action_dequeue(erp_action);
1243 retval = ZFCP_ERP_DISMISSED;
1244 goto unlock;
1245 }
1246
1247 zfcp_erp_action_to_running(erp_action);
1248
1249
1250 write_unlock(&adapter->erp_lock);
1251 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1252 retval = zfcp_erp_strategy_do_action(erp_action);
1253 read_lock_irqsave(&zfcp_data.config_lock, flags);
1254 write_lock(&adapter->erp_lock);
1255
1256 if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED)
1257 retval = ZFCP_ERP_CONTINUES;
1258
1259 switch (retval) {
1260 case ZFCP_ERP_NOMEM:
1261 if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) {
1262 ++adapter->erp_low_mem_count;
1263 erp_action->status |= ZFCP_STATUS_ERP_LOWMEM;
1264 }
1265 if (adapter->erp_total_count == adapter->erp_low_mem_count)
1266 _zfcp_erp_adapter_reopen(adapter, 0, "erstgy1", NULL);
1267 else {
1268 zfcp_erp_strategy_memwait(erp_action);
1269 retval = ZFCP_ERP_CONTINUES;
1270 }
1271 goto unlock;
1272
1273 case ZFCP_ERP_CONTINUES:
1274 if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
1275 --adapter->erp_low_mem_count;
1276 erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
1277 }
1278 goto unlock;
1279 }
1280
1281 retval = zfcp_erp_strategy_check_target(erp_action, retval);
1282 zfcp_erp_action_dequeue(erp_action);
1283 retval = zfcp_erp_strategy_statechange(erp_action, retval);
1284 if (retval == ZFCP_ERP_EXIT)
1285 goto unlock;
1286 zfcp_erp_strategy_followup_actions(erp_action);
1287
1288 unlock:
1289 write_unlock(&adapter->erp_lock);
1290 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1291
1292 if (retval != ZFCP_ERP_CONTINUES)
1293 zfcp_erp_action_cleanup(erp_action, retval);
1294
1295 return retval;
1296}
1297
1298static int zfcp_erp_thread(void *data)
1299{
1300 struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
1301 struct list_head *next;
1302 struct zfcp_erp_action *act;
1303 unsigned long flags;
1304 int ignore;
1305
1306 daemonize("zfcperp%s", dev_name(&adapter->ccw_device->dev));
1307
1308 siginitsetinv(¤t->blocked, 0);
1309 atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
1310 wake_up(&adapter->erp_thread_wqh);
1311
1312 while (!(atomic_read(&adapter->status) &
1313 ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) {
1314
1315 zfcp_rec_dbf_event_thread_lock("erthrd1", adapter);
1316 ignore = down_interruptible(&adapter->erp_ready_sem);
1317 zfcp_rec_dbf_event_thread_lock("erthrd2", adapter);
1318
1319 write_lock_irqsave(&adapter->erp_lock, flags);
1320 next = adapter->erp_ready_head.next;
1321 write_unlock_irqrestore(&adapter->erp_lock, flags);
1322
1323 if (next != &adapter->erp_ready_head) {
1324 act = list_entry(next, struct zfcp_erp_action, list);
1325
1326
1327 if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED)
1328 zfcp_erp_wakeup(adapter);
1329 }
1330 }
1331
1332 atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
1333 wake_up(&adapter->erp_thread_wqh);
1334
1335 return 0;
1336}
1337
1338
1339
1340
1341
1342
1343
1344int zfcp_erp_thread_setup(struct zfcp_adapter *adapter)
1345{
1346 int retval;
1347
1348 atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
1349 retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD);
1350 if (retval < 0) {
1351 dev_err(&adapter->ccw_device->dev,
1352 "Creating an ERP thread for the FCP device failed.\n");
1353 return retval;
1354 }
1355 wait_event(adapter->erp_thread_wqh,
1356 atomic_read(&adapter->status) &
1357 ZFCP_STATUS_ADAPTER_ERP_THREAD_UP);
1358 return 0;
1359}
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370void zfcp_erp_thread_kill(struct zfcp_adapter *adapter)
1371{
1372 atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
1373 up(&adapter->erp_ready_sem);
1374 zfcp_rec_dbf_event_thread_lock("erthrk1", adapter);
1375
1376 wait_event(adapter->erp_thread_wqh,
1377 !(atomic_read(&adapter->status) &
1378 ZFCP_STATUS_ADAPTER_ERP_THREAD_UP));
1379
1380 atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
1381 &adapter->status);
1382}
1383
1384
1385
1386
1387
1388
1389
1390void zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, char *id, void *ref)
1391{
1392 zfcp_erp_modify_adapter_status(adapter, id, ref,
1393 ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
1394}
1395
1396
1397
1398
1399
1400
1401
1402void zfcp_erp_port_failed(struct zfcp_port *port, char *id, void *ref)
1403{
1404 zfcp_erp_modify_port_status(port, id, ref,
1405 ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
1406}
1407
1408
1409
1410
1411
1412
1413
1414void zfcp_erp_unit_failed(struct zfcp_unit *unit, char *id, void *ref)
1415{
1416 zfcp_erp_modify_unit_status(unit, id, ref,
1417 ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
1418}
1419
1420
1421
1422
1423
1424void zfcp_erp_wait(struct zfcp_adapter *adapter)
1425{
1426 wait_event(adapter->erp_done_wqh,
1427 !(atomic_read(&adapter->status) &
1428 ZFCP_STATUS_ADAPTER_ERP_PENDING));
1429}
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, char *id,
1442 void *ref, u32 mask, int set_or_clear)
1443{
1444 struct zfcp_port *port;
1445 u32 common_mask = mask & ZFCP_COMMON_FLAGS;
1446
1447 if (set_or_clear == ZFCP_SET) {
1448 if (status_change_set(mask, &adapter->status))
1449 zfcp_rec_dbf_event_adapter(id, ref, adapter);
1450 atomic_set_mask(mask, &adapter->status);
1451 } else {
1452 if (status_change_clear(mask, &adapter->status))
1453 zfcp_rec_dbf_event_adapter(id, ref, adapter);
1454 atomic_clear_mask(mask, &adapter->status);
1455 if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
1456 atomic_set(&adapter->erp_counter, 0);
1457 }
1458
1459 if (common_mask)
1460 list_for_each_entry(port, &adapter->port_list_head, list)
1461 zfcp_erp_modify_port_status(port, id, ref, common_mask,
1462 set_or_clear);
1463}
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475void zfcp_erp_modify_port_status(struct zfcp_port *port, char *id, void *ref,
1476 u32 mask, int set_or_clear)
1477{
1478 struct zfcp_unit *unit;
1479 u32 common_mask = mask & ZFCP_COMMON_FLAGS;
1480
1481 if (set_or_clear == ZFCP_SET) {
1482 if (status_change_set(mask, &port->status))
1483 zfcp_rec_dbf_event_port(id, ref, port);
1484 atomic_set_mask(mask, &port->status);
1485 } else {
1486 if (status_change_clear(mask, &port->status))
1487 zfcp_rec_dbf_event_port(id, ref, port);
1488 atomic_clear_mask(mask, &port->status);
1489 if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
1490 atomic_set(&port->erp_counter, 0);
1491 }
1492
1493 if (common_mask)
1494 list_for_each_entry(unit, &port->unit_list_head, list)
1495 zfcp_erp_modify_unit_status(unit, id, ref, common_mask,
1496 set_or_clear);
1497}
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, char *id, void *ref,
1508 u32 mask, int set_or_clear)
1509{
1510 if (set_or_clear == ZFCP_SET) {
1511 if (status_change_set(mask, &unit->status))
1512 zfcp_rec_dbf_event_unit(id, ref, unit);
1513 atomic_set_mask(mask, &unit->status);
1514 } else {
1515 if (status_change_clear(mask, &unit->status))
1516 zfcp_rec_dbf_event_unit(id, ref, unit);
1517 atomic_clear_mask(mask, &unit->status);
1518 if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) {
1519 atomic_set(&unit->erp_counter, 0);
1520 }
1521 }
1522}
1523
1524
1525
1526
1527
1528
1529
1530void zfcp_erp_port_boxed(struct zfcp_port *port, char *id, void *ref)
1531{
1532 unsigned long flags;
1533
1534 read_lock_irqsave(&zfcp_data.config_lock, flags);
1535 zfcp_erp_modify_port_status(port, id, ref,
1536 ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET);
1537 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1538 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
1539}
1540
1541
1542
1543
1544
1545
1546
1547void zfcp_erp_unit_boxed(struct zfcp_unit *unit, char *id, void *ref)
1548{
1549 zfcp_erp_modify_unit_status(unit, id, ref,
1550 ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET);
1551 zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
1552}
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563void zfcp_erp_port_access_denied(struct zfcp_port *port, char *id, void *ref)
1564{
1565 unsigned long flags;
1566
1567 read_lock_irqsave(&zfcp_data.config_lock, flags);
1568 zfcp_erp_modify_port_status(port, id, ref,
1569 ZFCP_STATUS_COMMON_ERP_FAILED |
1570 ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
1571 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1572}
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, char *id, void *ref)
1583{
1584 zfcp_erp_modify_unit_status(unit, id, ref,
1585 ZFCP_STATUS_COMMON_ERP_FAILED |
1586 ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
1587}
1588
1589static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, char *id,
1590 void *ref)
1591{
1592 int status = atomic_read(&unit->status);
1593 if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
1594 ZFCP_STATUS_COMMON_ACCESS_BOXED)))
1595 return;
1596
1597 zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
1598}
1599
1600static void zfcp_erp_port_access_changed(struct zfcp_port *port, char *id,
1601 void *ref)
1602{
1603 struct zfcp_unit *unit;
1604 int status = atomic_read(&port->status);
1605
1606 if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
1607 ZFCP_STATUS_COMMON_ACCESS_BOXED))) {
1608 list_for_each_entry(unit, &port->unit_list_head, list)
1609 zfcp_erp_unit_access_changed(unit, id, ref);
1610 return;
1611 }
1612
1613 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
1614}
1615
1616
1617
1618
1619
1620
1621
1622void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, char *id,
1623 void *ref)
1624{
1625 struct zfcp_port *port;
1626 unsigned long flags;
1627
1628 if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
1629 return;
1630
1631 read_lock_irqsave(&zfcp_data.config_lock, flags);
1632 list_for_each_entry(port, &adapter->port_list_head, list)
1633 zfcp_erp_port_access_changed(port, id, ref);
1634 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1635}
1636
