4 * Error Recovery Procedures (ERP).
6 * Copyright IBM Corporation 2002, 2009
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
14 #define ZFCP_MAX_ERPS 3
16 enum 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,
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,
35 enum 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,
42 enum zfcp_erp_act_state
{
43 ZFCP_ERP_ACTION_RUNNING
= 1,
44 ZFCP_ERP_ACTION_READY
= 2,
47 enum zfcp_erp_act_result
{
48 ZFCP_ERP_SUCCEEDED
= 0,
50 ZFCP_ERP_CONTINUES
= 2,
52 ZFCP_ERP_DISMISSED
= 4,
56 static void zfcp_erp_adapter_block(struct zfcp_adapter
*adapter
, int mask
)
58 zfcp_erp_modify_adapter_status(adapter
, "erablk1", NULL
,
59 ZFCP_STATUS_COMMON_UNBLOCKED
| mask
,
63 static int zfcp_erp_action_exists(struct zfcp_erp_action
*act
)
65 struct zfcp_erp_action
*curr_act
;
67 list_for_each_entry(curr_act
, &act
->adapter
->erp_running_head
, list
)
69 return ZFCP_ERP_ACTION_RUNNING
;
73 static void zfcp_erp_action_ready(struct zfcp_erp_action
*act
)
75 struct zfcp_adapter
*adapter
= act
->adapter
;
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
);
83 static void zfcp_erp_action_dismiss(struct zfcp_erp_action
*act
)
85 act
->status
|= ZFCP_STATUS_ERP_DISMISSED
;
86 if (zfcp_erp_action_exists(act
) == ZFCP_ERP_ACTION_RUNNING
)
87 zfcp_erp_action_ready(act
);
90 static void zfcp_erp_action_dismiss_unit(struct zfcp_unit
*unit
)
92 if (atomic_read(&unit
->status
) & ZFCP_STATUS_COMMON_ERP_INUSE
)
93 zfcp_erp_action_dismiss(&unit
->erp_action
);
96 static void zfcp_erp_action_dismiss_port(struct zfcp_port
*port
)
98 struct zfcp_unit
*unit
;
100 if (atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_ERP_INUSE
)
101 zfcp_erp_action_dismiss(&port
->erp_action
);
103 list_for_each_entry(unit
, &port
->unit_list_head
, list
)
104 zfcp_erp_action_dismiss_unit(unit
);
107 static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter
*adapter
)
109 struct zfcp_port
*port
;
111 if (atomic_read(&adapter
->status
) & ZFCP_STATUS_COMMON_ERP_INUSE
)
112 zfcp_erp_action_dismiss(&adapter
->erp_action
);
114 list_for_each_entry(port
, &adapter
->port_list_head
, list
)
115 zfcp_erp_action_dismiss_port(port
);
118 static int zfcp_erp_required_act(int want
, struct zfcp_adapter
*adapter
,
119 struct zfcp_port
*port
,
120 struct zfcp_unit
*unit
)
123 int u_status
, p_status
, a_status
;
126 case ZFCP_ERP_ACTION_REOPEN_UNIT
:
127 u_status
= atomic_read(&unit
->status
);
128 if (u_status
& ZFCP_STATUS_COMMON_ERP_INUSE
)
130 p_status
= atomic_read(&port
->status
);
131 if (!(p_status
& ZFCP_STATUS_COMMON_RUNNING
) ||
132 p_status
& ZFCP_STATUS_COMMON_ERP_FAILED
)
134 if (!(p_status
& ZFCP_STATUS_COMMON_UNBLOCKED
))
135 need
= ZFCP_ERP_ACTION_REOPEN_PORT
;
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
)
142 a_status
= atomic_read(&adapter
->status
);
143 if (!(a_status
& ZFCP_STATUS_COMMON_RUNNING
) ||
144 a_status
& ZFCP_STATUS_COMMON_ERP_FAILED
)
146 if (!(a_status
& ZFCP_STATUS_COMMON_UNBLOCKED
))
147 need
= ZFCP_ERP_ACTION_REOPEN_ADAPTER
;
149 case ZFCP_ERP_ACTION_REOPEN_ADAPTER
:
150 a_status
= atomic_read(&adapter
->status
);
151 if (a_status
& ZFCP_STATUS_COMMON_ERP_INUSE
)
158 static 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
)
163 struct zfcp_erp_action
*erp_action
;
167 case ZFCP_ERP_ACTION_REOPEN_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
;
175 case ZFCP_ERP_ACTION_REOPEN_PORT
:
176 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED
:
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
;
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
;
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
;
209 static 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
)
213 int retval
= 1, need
;
214 struct zfcp_erp_action
*act
= NULL
;
216 if (!(atomic_read(&adapter
->status
) &
217 ZFCP_STATUS_ADAPTER_ERP_THREAD_UP
))
220 need
= zfcp_erp_required_act(want
, adapter
, port
, unit
);
224 atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING
, &adapter
->status
);
225 act
= zfcp_erp_setup_act(need
, adapter
, port
, unit
);
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
);
234 zfcp_rec_dbf_event_trigger(id
, ref
, want
, need
, act
,
235 adapter
, port
, unit
);
239 static int _zfcp_erp_adapter_reopen(struct zfcp_adapter
*adapter
,
240 int clear_mask
, char *id
, void *ref
)
242 zfcp_erp_adapter_block(adapter
, clear_mask
);
243 zfcp_scsi_schedule_rports_block(adapter
);
245 /* ensure propagation of failed status to new devices */
246 if (atomic_read(&adapter
->status
) & ZFCP_STATUS_COMMON_ERP_FAILED
) {
247 zfcp_erp_adapter_failed(adapter
, "erareo1", NULL
);
250 return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER
,
251 adapter
, NULL
, NULL
, id
, ref
);
255 * zfcp_erp_adapter_reopen - Reopen adapter.
256 * @adapter: Adapter to reopen.
257 * @clear: Status flags to clear.
258 * @id: Id for debug trace event.
259 * @ref: Reference for debug trace event.
261 void zfcp_erp_adapter_reopen(struct zfcp_adapter
*adapter
, int clear
,
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
);
274 * zfcp_erp_adapter_shutdown - Shutdown adapter.
275 * @adapter: Adapter to shut down.
276 * @clear: Status flags to clear.
277 * @id: Id for debug trace event.
278 * @ref: Reference for debug trace event.
280 void zfcp_erp_adapter_shutdown(struct zfcp_adapter
*adapter
, int clear
,
283 int flags
= ZFCP_STATUS_COMMON_RUNNING
| ZFCP_STATUS_COMMON_ERP_FAILED
;
284 zfcp_erp_adapter_reopen(adapter
, clear
| flags
, id
, ref
);
288 * zfcp_erp_port_shutdown - Shutdown port
289 * @port: Port to shut down.
290 * @clear: Status flags to clear.
291 * @id: Id for debug trace event.
292 * @ref: Reference for debug trace event.
294 void zfcp_erp_port_shutdown(struct zfcp_port
*port
, int clear
, char *id
,
297 int flags
= ZFCP_STATUS_COMMON_RUNNING
| ZFCP_STATUS_COMMON_ERP_FAILED
;
298 zfcp_erp_port_reopen(port
, clear
| flags
, id
, ref
);
302 * zfcp_erp_unit_shutdown - Shutdown unit
303 * @unit: Unit to shut down.
304 * @clear: Status flags to clear.
305 * @id: Id for debug trace event.
306 * @ref: Reference for debug trace event.
308 void zfcp_erp_unit_shutdown(struct zfcp_unit
*unit
, int clear
, char *id
,
311 int flags
= ZFCP_STATUS_COMMON_RUNNING
| ZFCP_STATUS_COMMON_ERP_FAILED
;
312 zfcp_erp_unit_reopen(unit
, clear
| flags
, id
, ref
);
315 static void zfcp_erp_port_block(struct zfcp_port
*port
, int clear
)
317 zfcp_erp_modify_port_status(port
, "erpblk1", NULL
,
318 ZFCP_STATUS_COMMON_UNBLOCKED
| clear
,
322 static void _zfcp_erp_port_forced_reopen(struct zfcp_port
*port
,
323 int clear
, char *id
, void *ref
)
325 zfcp_erp_port_block(port
, clear
);
326 zfcp_scsi_schedule_rport_block(port
);
328 if (atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_ERP_FAILED
)
331 zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED
,
332 port
->adapter
, port
, NULL
, id
, ref
);
336 * zfcp_erp_port_forced_reopen - Forced close of port and open again
337 * @port: Port to force close and to reopen.
338 * @id: Id for debug trace event.
339 * @ref: Reference for debug trace event.
341 void zfcp_erp_port_forced_reopen(struct zfcp_port
*port
, int clear
, char *id
,
345 struct zfcp_adapter
*adapter
= port
->adapter
;
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
);
354 static int _zfcp_erp_port_reopen(struct zfcp_port
*port
, int clear
, char *id
,
357 zfcp_erp_port_block(port
, clear
);
358 zfcp_scsi_schedule_rport_block(port
);
360 if (atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_ERP_FAILED
) {
361 /* ensure propagation of failed status to new devices */
362 zfcp_erp_port_failed(port
, "erpreo1", NULL
);
366 return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT
,
367 port
->adapter
, port
, NULL
, id
, ref
);
371 * zfcp_erp_port_reopen - trigger remote port recovery
372 * @port: port to recover
373 * @clear_mask: flags in port status to be cleared
375 * Returns 0 if recovery has been triggered, < 0 if not.
377 int zfcp_erp_port_reopen(struct zfcp_port
*port
, int clear
, char *id
, void *ref
)
381 struct zfcp_adapter
*adapter
= port
->adapter
;
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
);
392 static void zfcp_erp_unit_block(struct zfcp_unit
*unit
, int clear_mask
)
394 zfcp_erp_modify_unit_status(unit
, "erublk1", NULL
,
395 ZFCP_STATUS_COMMON_UNBLOCKED
| clear_mask
,
399 static void _zfcp_erp_unit_reopen(struct zfcp_unit
*unit
, int clear
, char *id
,
402 struct zfcp_adapter
*adapter
= unit
->port
->adapter
;
404 zfcp_erp_unit_block(unit
, clear
);
406 if (atomic_read(&unit
->status
) & ZFCP_STATUS_COMMON_ERP_FAILED
)
409 zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT
,
410 adapter
, unit
->port
, unit
, id
, ref
);
414 * zfcp_erp_unit_reopen - initiate reopen of a unit
415 * @unit: unit to be reopened
416 * @clear_mask: specifies flags in unit status to be cleared
417 * Return: 0 on success, < 0 on error
419 void zfcp_erp_unit_reopen(struct zfcp_unit
*unit
, int clear
, char *id
,
423 struct zfcp_port
*port
= unit
->port
;
424 struct zfcp_adapter
*adapter
= port
->adapter
;
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
);
433 static int status_change_set(unsigned long mask
, atomic_t
*status
)
435 return (atomic_read(status
) ^ mask
) & mask
;
438 static int status_change_clear(unsigned long mask
, atomic_t
*status
)
440 return atomic_read(status
) & mask
;
443 static void zfcp_erp_adapter_unblock(struct zfcp_adapter
*adapter
)
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
);
450 static void zfcp_erp_port_unblock(struct zfcp_port
*port
)
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
);
457 static void zfcp_erp_unit_unblock(struct zfcp_unit
*unit
)
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
);
464 static void zfcp_erp_action_to_running(struct zfcp_erp_action
*erp_action
)
466 list_move(&erp_action
->list
, &erp_action
->adapter
->erp_running_head
);
467 zfcp_rec_dbf_event_action("erator1", erp_action
);
470 static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action
*act
)
472 struct zfcp_adapter
*adapter
= act
->adapter
;
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
;
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
))
493 spin_unlock(&adapter
->req_list_lock
);
497 * zfcp_erp_notify - Trigger ERP action.
498 * @erp_action: ERP action to continue.
499 * @set_mask: ERP action status flags to set.
501 void zfcp_erp_notify(struct zfcp_erp_action
*erp_action
, unsigned long set_mask
)
503 struct zfcp_adapter
*adapter
= erp_action
->adapter
;
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
);
511 write_unlock_irqrestore(&adapter
->erp_lock
, flags
);
515 * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request
516 * @data: ERP action (from timer data)
518 void zfcp_erp_timeout_handler(unsigned long data
)
520 struct zfcp_erp_action
*act
= (struct zfcp_erp_action
*) data
;
521 zfcp_erp_notify(act
, ZFCP_STATUS_ERP_TIMEDOUT
);
524 static void zfcp_erp_memwait_handler(unsigned long data
)
526 zfcp_erp_notify((struct zfcp_erp_action
*)data
, 0);
529 static void zfcp_erp_strategy_memwait(struct zfcp_erp_action
*erp_action
)
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
);
538 static void _zfcp_erp_port_reopen_all(struct zfcp_adapter
*adapter
,
539 int clear
, char *id
, void *ref
)
541 struct zfcp_port
*port
;
543 list_for_each_entry(port
, &adapter
->port_list_head
, list
)
544 _zfcp_erp_port_reopen(port
, clear
, id
, ref
);
547 static void _zfcp_erp_unit_reopen_all(struct zfcp_port
*port
, int clear
,
550 struct zfcp_unit
*unit
;
552 list_for_each_entry(unit
, &port
->unit_list_head
, list
)
553 _zfcp_erp_unit_reopen(unit
, clear
, id
, ref
);
556 static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action
*act
)
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
;
563 /* initiate follow-up actions depending on success of finished action */
564 switch (act
->action
) {
566 case ZFCP_ERP_ACTION_REOPEN_ADAPTER
:
567 if (status
== ZFCP_ERP_SUCCEEDED
)
568 _zfcp_erp_port_reopen_all(adapter
, 0, "ersfa_1", NULL
);
570 _zfcp_erp_adapter_reopen(adapter
, 0, "ersfa_2", NULL
);
573 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED
:
574 if (status
== ZFCP_ERP_SUCCEEDED
)
575 _zfcp_erp_port_reopen(port
, 0, "ersfa_3", NULL
);
577 _zfcp_erp_adapter_reopen(adapter
, 0, "ersfa_4", NULL
);
580 case ZFCP_ERP_ACTION_REOPEN_PORT
:
581 if (status
== ZFCP_ERP_SUCCEEDED
)
582 _zfcp_erp_unit_reopen_all(port
, 0, "ersfa_5", NULL
);
584 _zfcp_erp_port_forced_reopen(port
, 0, "ersfa_6", NULL
);
587 case ZFCP_ERP_ACTION_REOPEN_UNIT
:
588 if (status
!= ZFCP_ERP_SUCCEEDED
)
589 _zfcp_erp_port_reopen(unit
->port
, 0, "ersfa_7", NULL
);
594 static void zfcp_erp_wakeup(struct zfcp_adapter
*adapter
)
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
,
604 wake_up(&adapter
->erp_done_wqh
);
606 read_unlock(&adapter
->erp_lock
);
607 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
610 static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action
*act
)
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
;
619 static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter
*adapter
)
621 struct zfcp_port
*port
;
622 port
= zfcp_port_enqueue(adapter
, adapter
->peer_wwpn
, 0,
624 if (IS_ERR(port
)) /* error or port already attached */
626 _zfcp_erp_port_reopen(port
, 0, "ereptp1", NULL
);
629 static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action
*erp_action
)
633 struct zfcp_adapter
*adapter
= erp_action
->adapter
;
635 atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK
, &adapter
->status
);
637 for (retries
= 7; retries
; retries
--) {
638 atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT
,
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
,
646 return ZFCP_ERP_FAILED
;
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
)
655 if (!(atomic_read(&adapter
->status
) &
656 ZFCP_STATUS_ADAPTER_HOST_CON_INIT
))
663 atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT
,
666 if (!(atomic_read(&adapter
->status
) & ZFCP_STATUS_ADAPTER_XCONFIG_OK
))
667 return ZFCP_ERP_FAILED
;
669 if (fc_host_port_type(adapter
->scsi_host
) == FC_PORTTYPE_PTP
)
670 zfcp_erp_enqueue_ptp_port(adapter
);
672 return ZFCP_ERP_SUCCEEDED
;
675 static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action
*act
)
678 struct zfcp_adapter
*adapter
= act
->adapter
;
680 write_lock_irq(&adapter
->erp_lock
);
681 zfcp_erp_action_to_running(act
);
682 write_unlock_irq(&adapter
->erp_lock
);
684 ret
= zfcp_fsf_exchange_port_data(act
);
685 if (ret
== -EOPNOTSUPP
)
686 return ZFCP_ERP_SUCCEEDED
;
688 return ZFCP_ERP_FAILED
;
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
;
696 return ZFCP_ERP_SUCCEEDED
;
699 static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action
*act
)
701 if (zfcp_erp_adapter_strat_fsf_xconf(act
) == ZFCP_ERP_FAILED
)
702 return ZFCP_ERP_FAILED
;
704 if (zfcp_erp_adapter_strategy_open_fsf_xport(act
) == ZFCP_ERP_FAILED
)
705 return ZFCP_ERP_FAILED
;
707 atomic_set(&act
->adapter
->stat_miss
, 16);
708 if (zfcp_status_read_refill(act
->adapter
))
709 return ZFCP_ERP_FAILED
;
711 return ZFCP_ERP_SUCCEEDED
;
714 static void zfcp_erp_adapter_strategy_close(struct zfcp_erp_action
*act
)
716 struct zfcp_adapter
*adapter
= act
->adapter
;
718 /* close queues to ensure that buffers are not accessed by adapter */
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 /* all ports and units are closed */
724 zfcp_erp_modify_adapter_status(adapter
, "erascl1", NULL
,
725 ZFCP_STATUS_COMMON_OPEN
, ZFCP_CLEAR
);
727 atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK
|
728 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
, &adapter
->status
);
731 static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action
*act
)
733 struct zfcp_adapter
*adapter
= act
->adapter
;
735 if (zfcp_erp_adapter_strategy_open_qdio(act
)) {
736 atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK
|
737 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
,
739 return ZFCP_ERP_FAILED
;
742 if (zfcp_erp_adapter_strategy_open_fsf(act
)) {
743 zfcp_erp_adapter_strategy_close(act
);
744 return ZFCP_ERP_FAILED
;
747 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN
, &adapter
->status
);
749 return ZFCP_ERP_SUCCEEDED
;
752 static int zfcp_erp_adapter_strategy(struct zfcp_erp_action
*act
)
754 struct zfcp_adapter
*adapter
= act
->adapter
;
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
;
762 if (zfcp_erp_adapter_strategy_open(act
)) {
764 return ZFCP_ERP_FAILED
;
767 return ZFCP_ERP_SUCCEEDED
;
770 static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action
*act
)
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
;
779 return ZFCP_ERP_FAILED
;
781 return ZFCP_ERP_CONTINUES
;
784 static void zfcp_erp_port_strategy_clearstati(struct zfcp_port
*port
)
786 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED
, &port
->status
);
789 static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action
*erp_action
)
791 struct zfcp_port
*port
= erp_action
->port
;
792 int status
= atomic_read(&port
->status
);
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
);
801 return ZFCP_ERP_FAILED
;
803 case ZFCP_ERP_STEP_PHYS_PORT_CLOSING
:
804 if (status
& ZFCP_STATUS_PORT_PHYS_OPEN
)
805 return ZFCP_ERP_SUCCEEDED
;
807 return ZFCP_ERP_FAILED
;
810 static int zfcp_erp_port_strategy_close(struct zfcp_erp_action
*erp_action
)
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
;
819 return ZFCP_ERP_FAILED
;
820 return ZFCP_ERP_CONTINUES
;
823 static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action
*erp_action
)
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
;
832 return ZFCP_ERP_FAILED
;
833 return ZFCP_ERP_CONTINUES
;
836 static int zfcp_erp_open_ptp_port(struct zfcp_erp_action
*act
)
838 struct zfcp_adapter
*adapter
= act
->adapter
;
839 struct zfcp_port
*port
= act
->port
;
841 if (port
->wwpn
!= adapter
->peer_wwpn
) {
842 zfcp_erp_port_failed(port
, "eroptp1", NULL
);
843 return ZFCP_ERP_FAILED
;
845 port
->d_id
= adapter
->peer_d_id
;
846 return zfcp_erp_port_strategy_open_port(act
);
849 void zfcp_erp_port_strategy_open_lookup(struct work_struct
*work
)
852 struct zfcp_port
*port
= container_of(work
, struct zfcp_port
,
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
;
860 zfcp_erp_notify(&port
->erp_action
, ZFCP_ERP_FAILED
);
864 static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action
*act
)
866 struct zfcp_adapter
*adapter
= act
->adapter
;
867 struct zfcp_port
*port
= act
->port
;
868 int p_status
= atomic_read(&port
->status
);
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
);
878 if (!queue_work(zfcp_data
.work_queue
,
881 return ZFCP_ERP_CONTINUES
;
883 case ZFCP_ERP_STEP_NAMESERVER_LOOKUP
:
885 return ZFCP_ERP_FAILED
;
886 return zfcp_erp_port_strategy_open_port(act
);
888 case ZFCP_ERP_STEP_PORT_OPENING
:
889 /* D_ID might have changed during open */
890 if (p_status
& ZFCP_STATUS_COMMON_OPEN
) {
892 return ZFCP_ERP_SUCCEEDED
;
894 act
->step
= ZFCP_ERP_STEP_PORT_CLOSING
;
895 return ZFCP_ERP_CONTINUES
;
897 /* fall through otherwise */
900 return ZFCP_ERP_FAILED
;
903 static int zfcp_erp_port_strategy(struct zfcp_erp_action
*erp_action
)
905 struct zfcp_port
*port
= erp_action
->port
;
907 if (atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_NOESC
)
908 goto close_init_done
;
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
);
917 case ZFCP_ERP_STEP_PORT_CLOSING
:
918 if (atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_OPEN
)
919 return ZFCP_ERP_FAILED
;
924 if (erp_action
->status
& ZFCP_STATUS_ERP_CLOSE_ONLY
)
925 return ZFCP_ERP_EXIT
;
927 return zfcp_erp_port_strategy_open_common(erp_action
);
930 static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit
*unit
)
932 atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED
|
933 ZFCP_STATUS_UNIT_SHARED
|
934 ZFCP_STATUS_UNIT_READONLY
,
938 static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action
*erp_action
)
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
;
945 return ZFCP_ERP_FAILED
;
946 return ZFCP_ERP_CONTINUES
;
949 static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action
*erp_action
)
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
;
956 return ZFCP_ERP_FAILED
;
957 return ZFCP_ERP_CONTINUES
;
960 static int zfcp_erp_unit_strategy(struct zfcp_erp_action
*erp_action
)
962 struct zfcp_unit
*unit
= erp_action
->unit
;
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 /* already closed, fall through */
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
);
977 case ZFCP_ERP_STEP_UNIT_OPENING
:
978 if (atomic_read(&unit
->status
) & ZFCP_STATUS_COMMON_OPEN
)
979 return ZFCP_ERP_SUCCEEDED
;
981 return ZFCP_ERP_FAILED
;
984 static int zfcp_erp_strategy_check_unit(struct zfcp_unit
*unit
, int result
)
987 case ZFCP_ERP_SUCCEEDED
:
988 atomic_set(&unit
->erp_counter
, 0);
989 zfcp_erp_unit_unblock(unit
);
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 "
997 (unsigned long long)unit
->fcp_lun
,
998 (unsigned long long)unit
->port
->wwpn
);
999 zfcp_erp_unit_failed(unit
, "erusck1", NULL
);
1004 if (atomic_read(&unit
->status
) & ZFCP_STATUS_COMMON_ERP_FAILED
) {
1005 zfcp_erp_unit_block(unit
, 0);
1006 result
= ZFCP_ERP_EXIT
;
1011 static int zfcp_erp_strategy_check_port(struct zfcp_port
*port
, int result
)
1014 case ZFCP_ERP_SUCCEEDED
:
1015 atomic_set(&port
->erp_counter
, 0);
1016 zfcp_erp_port_unblock(port
);
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
;
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
);
1034 if (atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_ERP_FAILED
) {
1035 zfcp_erp_port_block(port
, 0);
1036 result
= ZFCP_ERP_EXIT
;
1041 static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter
*adapter
,
1045 case ZFCP_ERP_SUCCEEDED
:
1046 atomic_set(&adapter
->erp_counter
, 0);
1047 zfcp_erp_adapter_unblock(adapter
);
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
);
1061 if (atomic_read(&adapter
->status
) & ZFCP_STATUS_COMMON_ERP_FAILED
) {
1062 zfcp_erp_adapter_block(adapter
, 0);
1063 result
= ZFCP_ERP_EXIT
;
1068 static int zfcp_erp_strategy_check_target(struct zfcp_erp_action
*erp_action
,
1071 struct zfcp_adapter
*adapter
= erp_action
->adapter
;
1072 struct zfcp_port
*port
= erp_action
->port
;
1073 struct zfcp_unit
*unit
= erp_action
->unit
;
1075 switch (erp_action
->action
) {
1077 case ZFCP_ERP_ACTION_REOPEN_UNIT
:
1078 result
= zfcp_erp_strategy_check_unit(unit
, result
);
1081 case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED
:
1082 case ZFCP_ERP_ACTION_REOPEN_PORT
:
1083 result
= zfcp_erp_strategy_check_port(port
, result
);
1086 case ZFCP_ERP_ACTION_REOPEN_ADAPTER
:
1087 result
= zfcp_erp_strategy_check_adapter(adapter
, result
);
1093 static int zfcp_erp_strat_change_det(atomic_t
*target_status
, u32 erp_status
)
1095 int status
= atomic_read(target_status
);
1097 if ((status
& ZFCP_STATUS_COMMON_RUNNING
) &&
1098 (erp_status
& ZFCP_STATUS_ERP_CLOSE_ONLY
))
1099 return 1; /* take it online */
1101 if (!(status
& ZFCP_STATUS_COMMON_RUNNING
) &&
1102 !(erp_status
& ZFCP_STATUS_ERP_CLOSE_ONLY
))
1103 return 1; /* take it offline */
1108 static int zfcp_erp_strategy_statechange(struct zfcp_erp_action
*act
, int ret
)
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
;
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
,
1122 return ZFCP_ERP_EXIT
;
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
,
1132 return ZFCP_ERP_EXIT
;
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
,
1141 return ZFCP_ERP_EXIT
;
1148 static void zfcp_erp_action_dequeue(struct zfcp_erp_action
*erp_action
)
1150 struct zfcp_adapter
*adapter
= erp_action
->adapter
;
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
;
1158 list_del(&erp_action
->list
);
1159 zfcp_rec_dbf_event_action("eractd1", erp_action
);
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
);
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
);
1173 case ZFCP_ERP_ACTION_REOPEN_ADAPTER
:
1174 atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE
,
1175 &erp_action
->adapter
->status
);
1180 static void zfcp_erp_action_cleanup(struct zfcp_erp_action
*act
, int result
)
1182 struct zfcp_adapter
*adapter
= act
->adapter
;
1183 struct zfcp_port
*port
= act
->port
;
1184 struct zfcp_unit
*unit
= act
->unit
;
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
);
1194 zfcp_unit_put(unit
);
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
);
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
);
1209 unregister_service_level(&adapter
->service_level
);
1210 zfcp_adapter_put(adapter
);
1215 static int zfcp_erp_strategy_do_action(struct zfcp_erp_action
*erp_action
)
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
);
1227 return ZFCP_ERP_FAILED
;
1230 static int zfcp_erp_strategy(struct zfcp_erp_action
*erp_action
)
1233 struct zfcp_adapter
*adapter
= erp_action
->adapter
;
1234 unsigned long flags
;
1236 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
1237 write_lock(&adapter
->erp_lock
);
1239 zfcp_erp_strategy_check_fsfreq(erp_action
);
1241 if (erp_action
->status
& ZFCP_STATUS_ERP_DISMISSED
) {
1242 zfcp_erp_action_dequeue(erp_action
);
1243 retval
= ZFCP_ERP_DISMISSED
;
1247 zfcp_erp_action_to_running(erp_action
);
1249 /* no lock to allow for blocking operations */
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
);
1256 if (erp_action
->status
& ZFCP_STATUS_ERP_DISMISSED
)
1257 retval
= ZFCP_ERP_CONTINUES
;
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
;
1265 if (adapter
->erp_total_count
== adapter
->erp_low_mem_count
)
1266 _zfcp_erp_adapter_reopen(adapter
, 0, "erstgy1", NULL
);
1268 zfcp_erp_strategy_memwait(erp_action
);
1269 retval
= ZFCP_ERP_CONTINUES
;
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
;
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
)
1286 zfcp_erp_strategy_followup_actions(erp_action
);
1289 write_unlock(&adapter
->erp_lock
);
1290 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
1292 if (retval
!= ZFCP_ERP_CONTINUES
)
1293 zfcp_erp_action_cleanup(erp_action
, retval
);
1298 static int zfcp_erp_thread(void *data
)
1300 struct zfcp_adapter
*adapter
= (struct zfcp_adapter
*) data
;
1301 struct list_head
*next
;
1302 struct zfcp_erp_action
*act
;
1303 unsigned long flags
;
1306 daemonize("zfcperp%s", dev_name(&adapter
->ccw_device
->dev
));
1307 /* Block all signals */
1308 siginitsetinv(¤t
->blocked
, 0);
1309 atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP
, &adapter
->status
);
1310 wake_up(&adapter
->erp_thread_wqh
);
1312 while (!(atomic_read(&adapter
->status
) &
1313 ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL
)) {
1314 write_lock_irqsave(&adapter
->erp_lock
, flags
);
1315 next
= adapter
->erp_ready_head
.next
;
1316 write_unlock_irqrestore(&adapter
->erp_lock
, flags
);
1318 if (next
!= &adapter
->erp_ready_head
) {
1319 act
= list_entry(next
, struct zfcp_erp_action
, list
);
1321 /* there is more to come after dismission, no notify */
1322 if (zfcp_erp_strategy(act
) != ZFCP_ERP_DISMISSED
)
1323 zfcp_erp_wakeup(adapter
);
1326 zfcp_rec_dbf_event_thread_lock("erthrd1", adapter
);
1327 ignore
= down_interruptible(&adapter
->erp_ready_sem
);
1328 zfcp_rec_dbf_event_thread_lock("erthrd2", adapter
);
1331 atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP
, &adapter
->status
);
1332 wake_up(&adapter
->erp_thread_wqh
);
1338 * zfcp_erp_thread_setup - Start ERP thread for adapter
1339 * @adapter: Adapter to start the ERP thread for
1341 * Returns 0 on success or error code from kernel_thread()
1343 int zfcp_erp_thread_setup(struct zfcp_adapter
*adapter
)
1347 atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP
, &adapter
->status
);
1348 retval
= kernel_thread(zfcp_erp_thread
, adapter
, SIGCHLD
);
1350 dev_err(&adapter
->ccw_device
->dev
,
1351 "Creating an ERP thread for the FCP device failed.\n");
1354 wait_event(adapter
->erp_thread_wqh
,
1355 atomic_read(&adapter
->status
) &
1356 ZFCP_STATUS_ADAPTER_ERP_THREAD_UP
);
1361 * zfcp_erp_thread_kill - Stop ERP thread.
1362 * @adapter: Adapter where the ERP thread should be stopped.
1364 * The caller of this routine ensures that the specified adapter has
1365 * been shut down and that this operation has been completed. Thus,
1366 * there are no pending erp_actions which would need to be handled
1369 void zfcp_erp_thread_kill(struct zfcp_adapter
*adapter
)
1371 atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL
, &adapter
->status
);
1372 up(&adapter
->erp_ready_sem
);
1373 zfcp_rec_dbf_event_thread_lock("erthrk1", adapter
);
1375 wait_event(adapter
->erp_thread_wqh
,
1376 !(atomic_read(&adapter
->status
) &
1377 ZFCP_STATUS_ADAPTER_ERP_THREAD_UP
));
1379 atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL
,
1384 * zfcp_erp_adapter_failed - Set adapter status to failed.
1385 * @adapter: Failed adapter.
1386 * @id: Event id for debug trace.
1387 * @ref: Reference for debug trace.
1389 void zfcp_erp_adapter_failed(struct zfcp_adapter
*adapter
, char *id
, void *ref
)
1391 zfcp_erp_modify_adapter_status(adapter
, id
, ref
,
1392 ZFCP_STATUS_COMMON_ERP_FAILED
, ZFCP_SET
);
1396 * zfcp_erp_port_failed - Set port status to failed.
1397 * @port: Failed port.
1398 * @id: Event id for debug trace.
1399 * @ref: Reference for debug trace.
1401 void zfcp_erp_port_failed(struct zfcp_port
*port
, char *id
, void *ref
)
1403 zfcp_erp_modify_port_status(port
, id
, ref
,
1404 ZFCP_STATUS_COMMON_ERP_FAILED
, ZFCP_SET
);
1408 * zfcp_erp_unit_failed - Set unit status to failed.
1409 * @unit: Failed unit.
1410 * @id: Event id for debug trace.
1411 * @ref: Reference for debug trace.
1413 void zfcp_erp_unit_failed(struct zfcp_unit
*unit
, char *id
, void *ref
)
1415 zfcp_erp_modify_unit_status(unit
, id
, ref
,
1416 ZFCP_STATUS_COMMON_ERP_FAILED
, ZFCP_SET
);
1420 * zfcp_erp_wait - wait for completion of error recovery on an adapter
1421 * @adapter: adapter for which to wait for completion of its error recovery
1423 void zfcp_erp_wait(struct zfcp_adapter
*adapter
)
1425 wait_event(adapter
->erp_done_wqh
,
1426 !(atomic_read(&adapter
->status
) &
1427 ZFCP_STATUS_ADAPTER_ERP_PENDING
));
1431 * zfcp_erp_modify_adapter_status - change adapter status bits
1432 * @adapter: adapter to change the status
1433 * @id: id for the debug trace
1434 * @ref: reference for the debug trace
1435 * @mask: status bits to change
1436 * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
1438 * Changes in common status bits are propagated to attached ports and units.
1440 void zfcp_erp_modify_adapter_status(struct zfcp_adapter
*adapter
, char *id
,
1441 void *ref
, u32 mask
, int set_or_clear
)
1443 struct zfcp_port
*port
;
1444 u32 common_mask
= mask
& ZFCP_COMMON_FLAGS
;
1446 if (set_or_clear
== ZFCP_SET
) {
1447 if (status_change_set(mask
, &adapter
->status
))
1448 zfcp_rec_dbf_event_adapter(id
, ref
, adapter
);
1449 atomic_set_mask(mask
, &adapter
->status
);
1451 if (status_change_clear(mask
, &adapter
->status
))
1452 zfcp_rec_dbf_event_adapter(id
, ref
, adapter
);
1453 atomic_clear_mask(mask
, &adapter
->status
);
1454 if (mask
& ZFCP_STATUS_COMMON_ERP_FAILED
)
1455 atomic_set(&adapter
->erp_counter
, 0);
1459 list_for_each_entry(port
, &adapter
->port_list_head
, list
)
1460 zfcp_erp_modify_port_status(port
, id
, ref
, common_mask
,
1465 * zfcp_erp_modify_port_status - change port status bits
1466 * @port: port to change the status bits
1467 * @id: id for the debug trace
1468 * @ref: reference for the debug trace
1469 * @mask: status bits to change
1470 * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
1472 * Changes in common status bits are propagated to attached units.
1474 void zfcp_erp_modify_port_status(struct zfcp_port
*port
, char *id
, void *ref
,
1475 u32 mask
, int set_or_clear
)
1477 struct zfcp_unit
*unit
;
1478 u32 common_mask
= mask
& ZFCP_COMMON_FLAGS
;
1480 if (set_or_clear
== ZFCP_SET
) {
1481 if (status_change_set(mask
, &port
->status
))
1482 zfcp_rec_dbf_event_port(id
, ref
, port
);
1483 atomic_set_mask(mask
, &port
->status
);
1485 if (status_change_clear(mask
, &port
->status
))
1486 zfcp_rec_dbf_event_port(id
, ref
, port
);
1487 atomic_clear_mask(mask
, &port
->status
);
1488 if (mask
& ZFCP_STATUS_COMMON_ERP_FAILED
)
1489 atomic_set(&port
->erp_counter
, 0);
1493 list_for_each_entry(unit
, &port
->unit_list_head
, list
)
1494 zfcp_erp_modify_unit_status(unit
, id
, ref
, common_mask
,
1499 * zfcp_erp_modify_unit_status - change unit status bits
1500 * @unit: unit to change the status bits
1501 * @id: id for the debug trace
1502 * @ref: reference for the debug trace
1503 * @mask: status bits to change
1504 * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
1506 void zfcp_erp_modify_unit_status(struct zfcp_unit
*unit
, char *id
, void *ref
,
1507 u32 mask
, int set_or_clear
)
1509 if (set_or_clear
== ZFCP_SET
) {
1510 if (status_change_set(mask
, &unit
->status
))
1511 zfcp_rec_dbf_event_unit(id
, ref
, unit
);
1512 atomic_set_mask(mask
, &unit
->status
);
1514 if (status_change_clear(mask
, &unit
->status
))
1515 zfcp_rec_dbf_event_unit(id
, ref
, unit
);
1516 atomic_clear_mask(mask
, &unit
->status
);
1517 if (mask
& ZFCP_STATUS_COMMON_ERP_FAILED
) {
1518 atomic_set(&unit
->erp_counter
, 0);
1524 * zfcp_erp_port_boxed - Mark port as "boxed" and start ERP
1525 * @port: The "boxed" port.
1526 * @id: The debug trace id.
1527 * @id: Reference for the debug trace.
1529 void zfcp_erp_port_boxed(struct zfcp_port
*port
, char *id
, void *ref
)
1531 unsigned long flags
;
1533 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
1534 zfcp_erp_modify_port_status(port
, id
, ref
,
1535 ZFCP_STATUS_COMMON_ACCESS_BOXED
, ZFCP_SET
);
1536 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
1537 zfcp_erp_port_reopen(port
, ZFCP_STATUS_COMMON_ERP_FAILED
, id
, ref
);
1541 * zfcp_erp_unit_boxed - Mark unit as "boxed" and start ERP
1542 * @port: The "boxed" unit.
1543 * @id: The debug trace id.
1544 * @id: Reference for the debug trace.
1546 void zfcp_erp_unit_boxed(struct zfcp_unit
*unit
, char *id
, void *ref
)
1548 zfcp_erp_modify_unit_status(unit
, id
, ref
,
1549 ZFCP_STATUS_COMMON_ACCESS_BOXED
, ZFCP_SET
);
1550 zfcp_erp_unit_reopen(unit
, ZFCP_STATUS_COMMON_ERP_FAILED
, id
, ref
);
1554 * zfcp_erp_port_access_denied - Adapter denied access to port.
1555 * @port: port where access has been denied
1556 * @id: id for debug trace
1557 * @ref: reference for debug trace
1559 * Since the adapter has denied access, stop using the port and the
1562 void zfcp_erp_port_access_denied(struct zfcp_port
*port
, char *id
, void *ref
)
1564 unsigned long flags
;
1566 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
1567 zfcp_erp_modify_port_status(port
, id
, ref
,
1568 ZFCP_STATUS_COMMON_ERP_FAILED
|
1569 ZFCP_STATUS_COMMON_ACCESS_DENIED
, ZFCP_SET
);
1570 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
1574 * zfcp_erp_unit_access_denied - Adapter denied access to unit.
1575 * @unit: unit where access has been denied
1576 * @id: id for debug trace
1577 * @ref: reference for debug trace
1579 * Since the adapter has denied access, stop using the unit.
1581 void zfcp_erp_unit_access_denied(struct zfcp_unit
*unit
, char *id
, void *ref
)
1583 zfcp_erp_modify_unit_status(unit
, id
, ref
,
1584 ZFCP_STATUS_COMMON_ERP_FAILED
|
1585 ZFCP_STATUS_COMMON_ACCESS_DENIED
, ZFCP_SET
);
1588 static void zfcp_erp_unit_access_changed(struct zfcp_unit
*unit
, char *id
,
1591 int status
= atomic_read(&unit
->status
);
1592 if (!(status
& (ZFCP_STATUS_COMMON_ACCESS_DENIED
|
1593 ZFCP_STATUS_COMMON_ACCESS_BOXED
)))
1596 zfcp_erp_unit_reopen(unit
, ZFCP_STATUS_COMMON_ERP_FAILED
, id
, ref
);
1599 static void zfcp_erp_port_access_changed(struct zfcp_port
*port
, char *id
,
1602 struct zfcp_unit
*unit
;
1603 int status
= atomic_read(&port
->status
);
1605 if (!(status
& (ZFCP_STATUS_COMMON_ACCESS_DENIED
|
1606 ZFCP_STATUS_COMMON_ACCESS_BOXED
))) {
1607 list_for_each_entry(unit
, &port
->unit_list_head
, list
)
1608 zfcp_erp_unit_access_changed(unit
, id
, ref
);
1612 zfcp_erp_port_reopen(port
, ZFCP_STATUS_COMMON_ERP_FAILED
, id
, ref
);
1616 * zfcp_erp_adapter_access_changed - Process change in adapter ACT
1617 * @adapter: Adapter where the Access Control Table (ACT) changed
1618 * @id: Id for debug trace
1619 * @ref: Reference for debug trace
1621 void zfcp_erp_adapter_access_changed(struct zfcp_adapter
*adapter
, char *id
,
1624 struct zfcp_port
*port
;
1625 unsigned long flags
;
1627 if (adapter
->connection_features
& FSF_FEATURE_NPIV_MODE
)
1630 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
1631 list_for_each_entry(port
, &adapter
->port_list_head
, list
)
1632 zfcp_erp_port_access_changed(port
, id
, ref
);
1633 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);