Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * | |
3 | * linux/drivers/s390/scsi/zfcp_erp.c | |
4 | * | |
5 | * FCP adapter driver for IBM eServer zSeries | |
6 | * | |
7 | * (C) Copyright IBM Corp. 2002, 2004 | |
8 | * | |
9 | * Author(s): Martin Peschke <mpeschke@de.ibm.com> | |
10 | * Raimund Schroeder <raimund.schroeder@de.ibm.com> | |
11 | * Aron Zeh | |
12 | * Wolfgang Taphorn | |
13 | * Stefan Bader <stefan.bader@de.ibm.com> | |
14 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
15 | * Andreas Herrmann <aherrman@de.ibm.com> | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2, or (at your option) | |
20 | * any later version. | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, | |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License | |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
30 | */ | |
31 | ||
32 | #define ZFCP_LOG_AREA ZFCP_LOG_AREA_ERP | |
33 | ||
34 | #define ZFCP_ERP_REVISION "$Revision: 1.86 $" | |
35 | ||
36 | #include "zfcp_ext.h" | |
37 | ||
64b29a13 | 38 | static int zfcp_erp_adisc(struct zfcp_port *); |
1da177e4 LT |
39 | static void zfcp_erp_adisc_handler(unsigned long); |
40 | ||
41 | static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int); | |
42 | static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int); | |
43 | static int zfcp_erp_port_reopen_internal(struct zfcp_port *, int); | |
44 | static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *, int); | |
45 | ||
46 | static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *, int); | |
47 | static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *, int); | |
48 | ||
49 | static void zfcp_erp_adapter_block(struct zfcp_adapter *, int); | |
50 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *); | |
51 | static void zfcp_erp_port_block(struct zfcp_port *, int); | |
52 | static void zfcp_erp_port_unblock(struct zfcp_port *); | |
53 | static void zfcp_erp_unit_block(struct zfcp_unit *, int); | |
54 | static void zfcp_erp_unit_unblock(struct zfcp_unit *); | |
55 | ||
56 | static int zfcp_erp_thread(void *); | |
57 | ||
58 | static int zfcp_erp_strategy(struct zfcp_erp_action *); | |
59 | ||
60 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *); | |
61 | static int zfcp_erp_strategy_memwait(struct zfcp_erp_action *); | |
62 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *, int); | |
63 | static int zfcp_erp_strategy_check_unit(struct zfcp_unit *, int); | |
64 | static int zfcp_erp_strategy_check_port(struct zfcp_port *, int); | |
65 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *, int); | |
66 | static int zfcp_erp_strategy_statechange(int, u32, struct zfcp_adapter *, | |
67 | struct zfcp_port *, | |
68 | struct zfcp_unit *, int); | |
69 | static inline int zfcp_erp_strategy_statechange_detected(atomic_t *, u32); | |
70 | static int zfcp_erp_strategy_followup_actions(int, struct zfcp_adapter *, | |
71 | struct zfcp_port *, | |
72 | struct zfcp_unit *, int); | |
73 | static int zfcp_erp_strategy_check_queues(struct zfcp_adapter *); | |
74 | static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int); | |
75 | ||
76 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *); | |
77 | static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int); | |
78 | static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *); | |
79 | static int zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *); | |
80 | static int zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *); | |
81 | static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *); | |
82 | static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *); | |
83 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *); | |
84 | static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *); | |
85 | static int zfcp_erp_adapter_strategy_open_fsf_statusread( | |
86 | struct zfcp_erp_action *); | |
87 | ||
88 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *); | |
89 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *); | |
90 | ||
91 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *); | |
92 | static int zfcp_erp_port_strategy_clearstati(struct zfcp_port *); | |
93 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *); | |
94 | static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *); | |
95 | static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *); | |
96 | static int zfcp_erp_port_strategy_open_nameserver_wakeup( | |
97 | struct zfcp_erp_action *); | |
98 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *); | |
99 | static int zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *); | |
100 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *); | |
101 | ||
102 | static int zfcp_erp_unit_strategy(struct zfcp_erp_action *); | |
103 | static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *); | |
104 | static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *); | |
105 | static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *); | |
106 | ||
107 | static int zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *); | |
108 | static int zfcp_erp_action_dismiss_port(struct zfcp_port *); | |
109 | static int zfcp_erp_action_dismiss_unit(struct zfcp_unit *); | |
110 | static int zfcp_erp_action_dismiss(struct zfcp_erp_action *); | |
111 | ||
112 | static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *, | |
113 | struct zfcp_port *, struct zfcp_unit *); | |
114 | static int zfcp_erp_action_dequeue(struct zfcp_erp_action *); | |
115 | static void zfcp_erp_action_cleanup(int, struct zfcp_adapter *, | |
116 | struct zfcp_port *, struct zfcp_unit *, | |
117 | int); | |
118 | ||
119 | static void zfcp_erp_action_ready(struct zfcp_erp_action *); | |
120 | static int zfcp_erp_action_exists(struct zfcp_erp_action *); | |
121 | ||
122 | static inline void zfcp_erp_action_to_ready(struct zfcp_erp_action *); | |
123 | static inline void zfcp_erp_action_to_running(struct zfcp_erp_action *); | |
124 | ||
125 | static void zfcp_erp_memwait_handler(unsigned long); | |
126 | static void zfcp_erp_timeout_handler(unsigned long); | |
127 | static inline void zfcp_erp_timeout_init(struct zfcp_erp_action *); | |
128 | ||
129 | /** | |
130 | * zfcp_fsf_request_timeout_handler - called if a request timed out | |
131 | * @data: pointer to adapter for handler function | |
132 | * | |
133 | * This function needs to be called if requests (ELS, Generic Service, | |
134 | * or SCSI commands) exceed a certain time limit. The assumption is | |
135 | * that after the time limit the adapter get stuck. So we trigger a reopen of | |
136 | * the adapter. This should not be used for error recovery, SCSI abort | |
137 | * commands and SCSI requests from SCSI mid-layer. | |
138 | */ | |
139 | void | |
140 | zfcp_fsf_request_timeout_handler(unsigned long data) | |
141 | { | |
142 | struct zfcp_adapter *adapter; | |
143 | ||
144 | adapter = (struct zfcp_adapter *) data; | |
145 | ||
146 | zfcp_erp_adapter_reopen(adapter, 0); | |
147 | } | |
148 | ||
149 | /* | |
150 | * function: zfcp_fsf_scsi_er_timeout_handler | |
151 | * | |
152 | * purpose: This function needs to be called whenever a SCSI error recovery | |
153 | * action (abort/reset) does not return. | |
154 | * Re-opening the adapter means that the command can be returned | |
155 | * by zfcp (it is guarranteed that it does not return via the | |
156 | * adapter anymore). The buffer can then be used again. | |
157 | * | |
158 | * returns: sod all | |
159 | */ | |
160 | void | |
161 | zfcp_fsf_scsi_er_timeout_handler(unsigned long data) | |
162 | { | |
163 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; | |
164 | ||
165 | ZFCP_LOG_NORMAL("warning: SCSI error recovery timed out. " | |
166 | "Restarting all operations on the adapter %s\n", | |
167 | zfcp_get_busid_by_adapter(adapter)); | |
168 | debug_text_event(adapter->erp_dbf, 1, "eh_lmem_tout"); | |
169 | zfcp_erp_adapter_reopen(adapter, 0); | |
170 | ||
171 | return; | |
172 | } | |
173 | ||
174 | /* | |
175 | * function: | |
176 | * | |
177 | * purpose: called if an adapter failed, | |
178 | * initiates adapter recovery which is done | |
179 | * asynchronously | |
180 | * | |
181 | * returns: 0 - initiated action succesfully | |
182 | * <0 - failed to initiate action | |
183 | */ | |
184 | int | |
185 | zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *adapter, int clear_mask) | |
186 | { | |
187 | int retval; | |
188 | ||
189 | debug_text_event(adapter->erp_dbf, 5, "a_ro"); | |
190 | ZFCP_LOG_DEBUG("reopen adapter %s\n", | |
191 | zfcp_get_busid_by_adapter(adapter)); | |
192 | ||
193 | zfcp_erp_adapter_block(adapter, clear_mask); | |
194 | ||
195 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { | |
196 | ZFCP_LOG_DEBUG("skipped reopen of failed adapter %s\n", | |
197 | zfcp_get_busid_by_adapter(adapter)); | |
198 | debug_text_event(adapter->erp_dbf, 5, "a_ro_f"); | |
199 | /* ensure propagation of failed status to new devices */ | |
200 | zfcp_erp_adapter_failed(adapter); | |
201 | retval = -EIO; | |
202 | goto out; | |
203 | } | |
204 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, | |
205 | adapter, NULL, NULL); | |
206 | ||
207 | out: | |
208 | return retval; | |
209 | } | |
210 | ||
211 | /* | |
212 | * function: | |
213 | * | |
214 | * purpose: Wrappper for zfcp_erp_adapter_reopen_internal | |
215 | * used to ensure the correct locking | |
216 | * | |
217 | * returns: 0 - initiated action succesfully | |
218 | * <0 - failed to initiate action | |
219 | */ | |
220 | int | |
221 | zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear_mask) | |
222 | { | |
223 | int retval; | |
224 | unsigned long flags; | |
225 | ||
226 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
227 | write_lock(&adapter->erp_lock); | |
228 | retval = zfcp_erp_adapter_reopen_internal(adapter, clear_mask); | |
229 | write_unlock(&adapter->erp_lock); | |
230 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
231 | ||
232 | return retval; | |
233 | } | |
234 | ||
235 | /* | |
236 | * function: | |
237 | * | |
238 | * purpose: | |
239 | * | |
240 | * returns: | |
241 | */ | |
242 | int | |
243 | zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear_mask) | |
244 | { | |
245 | int retval; | |
246 | ||
247 | retval = zfcp_erp_adapter_reopen(adapter, | |
248 | ZFCP_STATUS_COMMON_RUNNING | | |
249 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
250 | clear_mask); | |
251 | ||
252 | return retval; | |
253 | } | |
254 | ||
255 | /* | |
256 | * function: | |
257 | * | |
258 | * purpose: | |
259 | * | |
260 | * returns: | |
261 | */ | |
262 | int | |
263 | zfcp_erp_port_shutdown(struct zfcp_port *port, int clear_mask) | |
264 | { | |
265 | int retval; | |
266 | ||
267 | retval = zfcp_erp_port_reopen(port, | |
268 | ZFCP_STATUS_COMMON_RUNNING | | |
269 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
270 | clear_mask); | |
271 | ||
272 | return retval; | |
273 | } | |
274 | ||
275 | /* | |
276 | * function: | |
277 | * | |
278 | * purpose: | |
279 | * | |
280 | * returns: | |
281 | */ | |
282 | int | |
283 | zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask) | |
284 | { | |
285 | int retval; | |
286 | ||
287 | retval = zfcp_erp_unit_reopen(unit, | |
288 | ZFCP_STATUS_COMMON_RUNNING | | |
289 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
290 | clear_mask); | |
291 | ||
292 | return retval; | |
293 | } | |
294 | ||
295 | ||
296 | /** | |
297 | * zfcp_erp_adisc - send ADISC ELS command | |
64b29a13 | 298 | * @port: port structure |
1da177e4 LT |
299 | */ |
300 | int | |
64b29a13 | 301 | zfcp_erp_adisc(struct zfcp_port *port) |
1da177e4 | 302 | { |
64b29a13 | 303 | struct zfcp_adapter *adapter = port->adapter; |
1da177e4 LT |
304 | struct zfcp_send_els *send_els; |
305 | struct zfcp_ls_adisc *adisc; | |
306 | void *address = NULL; | |
307 | int retval = 0; | |
308 | struct timer_list *timer; | |
309 | ||
310 | send_els = kmalloc(sizeof(struct zfcp_send_els), GFP_ATOMIC); | |
311 | if (send_els == NULL) | |
312 | goto nomem; | |
313 | memset(send_els, 0, sizeof(*send_els)); | |
314 | ||
315 | send_els->req = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); | |
316 | if (send_els->req == NULL) | |
317 | goto nomem; | |
318 | memset(send_els->req, 0, sizeof(*send_els->req)); | |
319 | ||
320 | send_els->resp = kmalloc(sizeof(struct scatterlist), GFP_ATOMIC); | |
321 | if (send_els->resp == NULL) | |
322 | goto nomem; | |
323 | memset(send_els->resp, 0, sizeof(*send_els->resp)); | |
324 | ||
325 | address = (void *) get_zeroed_page(GFP_ATOMIC); | |
326 | if (address == NULL) | |
327 | goto nomem; | |
328 | ||
329 | zfcp_address_to_sg(address, send_els->req); | |
330 | address += PAGE_SIZE >> 1; | |
331 | zfcp_address_to_sg(address, send_els->resp); | |
332 | send_els->req_count = send_els->resp_count = 1; | |
333 | ||
334 | send_els->adapter = adapter; | |
64b29a13 AH |
335 | send_els->port = port; |
336 | send_els->d_id = port->d_id; | |
1da177e4 LT |
337 | send_els->handler = zfcp_erp_adisc_handler; |
338 | send_els->handler_data = (unsigned long) send_els; | |
339 | ||
340 | adisc = zfcp_sg_to_address(send_els->req); | |
341 | send_els->ls_code = adisc->code = ZFCP_LS_ADISC; | |
342 | ||
343 | send_els->req->length = sizeof(struct zfcp_ls_adisc); | |
344 | send_els->resp->length = sizeof(struct zfcp_ls_adisc_acc); | |
345 | ||
346 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports | |
347 | without FC-AL-2 capability, so we don't set it */ | |
348 | adisc->wwpn = adapter->wwpn; | |
349 | adisc->wwnn = adapter->wwnn; | |
350 | adisc->nport_id = adapter->s_id; | |
351 | ZFCP_LOG_INFO("ADISC request from s_id 0x%08x to d_id 0x%08x " | |
352 | "(wwpn=0x%016Lx, wwnn=0x%016Lx, " | |
353 | "hard_nport_id=0x%08x, nport_id=0x%08x)\n", | |
64b29a13 | 354 | adapter->s_id, send_els->d_id, (wwn_t) adisc->wwpn, |
1da177e4 LT |
355 | (wwn_t) adisc->wwnn, adisc->hard_nport_id, |
356 | adisc->nport_id); | |
357 | ||
358 | timer = kmalloc(sizeof(struct timer_list), GFP_ATOMIC); | |
359 | if (!timer) | |
360 | goto nomem; | |
361 | ||
362 | init_timer(timer); | |
363 | timer->function = zfcp_fsf_request_timeout_handler; | |
364 | timer->data = (unsigned long) adapter; | |
365 | timer->expires = ZFCP_FSF_REQUEST_TIMEOUT; | |
366 | send_els->timer = timer; | |
367 | ||
368 | retval = zfcp_fsf_send_els(send_els); | |
369 | if (retval != 0) { | |
370 | ZFCP_LOG_NORMAL("error: initiation of Send ELS failed for port " | |
64b29a13 | 371 | "0x%08x on adapter %s\n", send_els->d_id, |
1da177e4 LT |
372 | zfcp_get_busid_by_adapter(adapter)); |
373 | del_timer(send_els->timer); | |
374 | goto freemem; | |
375 | } | |
376 | ||
377 | goto out; | |
378 | ||
379 | nomem: | |
380 | retval = -ENOMEM; | |
381 | freemem: | |
382 | if (address != NULL) | |
383 | __free_pages(send_els->req->page, 0); | |
384 | if (send_els != NULL) { | |
385 | kfree(send_els->timer); | |
386 | kfree(send_els->req); | |
387 | kfree(send_els->resp); | |
388 | kfree(send_els); | |
389 | } | |
390 | out: | |
391 | return retval; | |
392 | } | |
393 | ||
394 | ||
395 | /** | |
396 | * zfcp_erp_adisc_handler - handler for ADISC ELS command | |
397 | * @data: pointer to struct zfcp_send_els | |
398 | * | |
399 | * If ADISC failed (LS_RJT or timed out) forced reopen of the port is triggered. | |
400 | */ | |
401 | void | |
402 | zfcp_erp_adisc_handler(unsigned long data) | |
403 | { | |
404 | struct zfcp_send_els *send_els; | |
405 | struct zfcp_port *port; | |
406 | struct zfcp_adapter *adapter; | |
407 | fc_id_t d_id; | |
408 | struct zfcp_ls_adisc_acc *adisc; | |
409 | ||
410 | send_els = (struct zfcp_send_els *) data; | |
411 | ||
412 | del_timer(send_els->timer); | |
413 | ||
414 | adapter = send_els->adapter; | |
64b29a13 | 415 | port = send_els->port; |
1da177e4 LT |
416 | d_id = send_els->d_id; |
417 | ||
1da177e4 LT |
418 | /* request rejected or timed out */ |
419 | if (send_els->status != 0) { | |
420 | ZFCP_LOG_NORMAL("ELS request rejected/timed out, " | |
421 | "force physical port reopen " | |
422 | "(adapter %s, port d_id=0x%08x)\n", | |
423 | zfcp_get_busid_by_adapter(adapter), d_id); | |
424 | debug_text_event(adapter->erp_dbf, 3, "forcreop"); | |
425 | if (zfcp_erp_port_forced_reopen(port, 0)) | |
426 | ZFCP_LOG_NORMAL("failed reopen of port " | |
427 | "(adapter %s, wwpn=0x%016Lx)\n", | |
428 | zfcp_get_busid_by_port(port), | |
429 | port->wwpn); | |
430 | goto out; | |
431 | } | |
432 | ||
433 | adisc = zfcp_sg_to_address(send_els->resp); | |
434 | ||
435 | ZFCP_LOG_INFO("ADISC response from d_id 0x%08x to s_id " | |
436 | "0x%08x (wwpn=0x%016Lx, wwnn=0x%016Lx, " | |
437 | "hard_nport_id=0x%08x, nport_id=0x%08x)\n", | |
438 | d_id, adapter->s_id, (wwn_t) adisc->wwpn, | |
439 | (wwn_t) adisc->wwnn, adisc->hard_nport_id, | |
440 | adisc->nport_id); | |
441 | ||
442 | /* set wwnn for port */ | |
443 | if (port->wwnn == 0) | |
444 | port->wwnn = adisc->wwnn; | |
445 | ||
446 | if (port->wwpn != adisc->wwpn) { | |
447 | ZFCP_LOG_NORMAL("d_id assignment changed, reopening " | |
448 | "port (adapter %s, wwpn=0x%016Lx, " | |
449 | "adisc_resp_wwpn=0x%016Lx)\n", | |
450 | zfcp_get_busid_by_port(port), | |
451 | port->wwpn, (wwn_t) adisc->wwpn); | |
452 | if (zfcp_erp_port_reopen(port, 0)) | |
453 | ZFCP_LOG_NORMAL("failed reopen of port " | |
454 | "(adapter %s, wwpn=0x%016Lx)\n", | |
455 | zfcp_get_busid_by_port(port), | |
456 | port->wwpn); | |
457 | } | |
458 | ||
459 | out: | |
460 | zfcp_port_put(port); | |
461 | __free_pages(send_els->req->page, 0); | |
462 | kfree(send_els->timer); | |
463 | kfree(send_els->req); | |
464 | kfree(send_els->resp); | |
465 | kfree(send_els); | |
466 | } | |
467 | ||
468 | ||
469 | /** | |
470 | * zfcp_test_link - lightweight link test procedure | |
471 | * @port: port to be tested | |
472 | * | |
473 | * Test status of a link to a remote port using the ELS command ADISC. | |
474 | */ | |
475 | int | |
476 | zfcp_test_link(struct zfcp_port *port) | |
477 | { | |
478 | int retval; | |
479 | ||
480 | zfcp_port_get(port); | |
64b29a13 | 481 | retval = zfcp_erp_adisc(port); |
1da177e4 LT |
482 | if (retval != 0) { |
483 | zfcp_port_put(port); | |
484 | ZFCP_LOG_NORMAL("reopen needed for port 0x%016Lx " | |
485 | "on adapter %s\n ", port->wwpn, | |
486 | zfcp_get_busid_by_port(port)); | |
487 | retval = zfcp_erp_port_forced_reopen(port, 0); | |
488 | if (retval != 0) { | |
489 | ZFCP_LOG_NORMAL("reopen of remote port 0x%016Lx " | |
490 | "on adapter %s failed\n", port->wwpn, | |
491 | zfcp_get_busid_by_port(port)); | |
492 | retval = -EPERM; | |
493 | } | |
494 | } | |
495 | ||
496 | return retval; | |
497 | } | |
498 | ||
499 | ||
500 | /* | |
501 | * function: | |
502 | * | |
503 | * purpose: called if a port failed to be opened normally | |
504 | * initiates Forced Reopen recovery which is done | |
505 | * asynchronously | |
506 | * | |
507 | * returns: 0 - initiated action succesfully | |
508 | * <0 - failed to initiate action | |
509 | */ | |
510 | static int | |
511 | zfcp_erp_port_forced_reopen_internal(struct zfcp_port *port, int clear_mask) | |
512 | { | |
513 | int retval; | |
514 | struct zfcp_adapter *adapter = port->adapter; | |
515 | ||
516 | debug_text_event(adapter->erp_dbf, 5, "pf_ro"); | |
517 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
518 | ||
519 | ZFCP_LOG_DEBUG("forced reopen of port 0x%016Lx on adapter %s\n", | |
520 | port->wwpn, zfcp_get_busid_by_port(port)); | |
521 | ||
522 | zfcp_erp_port_block(port, clear_mask); | |
523 | ||
524 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { | |
525 | ZFCP_LOG_DEBUG("skipped forced reopen of failed port 0x%016Lx " | |
526 | "on adapter %s\n", port->wwpn, | |
527 | zfcp_get_busid_by_port(port)); | |
528 | debug_text_event(adapter->erp_dbf, 5, "pf_ro_f"); | |
529 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
530 | retval = -EIO; | |
531 | goto out; | |
532 | } | |
533 | ||
534 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, | |
535 | port->adapter, port, NULL); | |
536 | ||
537 | out: | |
538 | return retval; | |
539 | } | |
540 | ||
541 | /* | |
542 | * function: | |
543 | * | |
544 | * purpose: Wrappper for zfcp_erp_port_forced_reopen_internal | |
545 | * used to ensure the correct locking | |
546 | * | |
547 | * returns: 0 - initiated action succesfully | |
548 | * <0 - failed to initiate action | |
549 | */ | |
550 | int | |
551 | zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear_mask) | |
552 | { | |
553 | int retval; | |
554 | unsigned long flags; | |
555 | struct zfcp_adapter *adapter; | |
556 | ||
557 | adapter = port->adapter; | |
558 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
559 | write_lock(&adapter->erp_lock); | |
560 | retval = zfcp_erp_port_forced_reopen_internal(port, clear_mask); | |
561 | write_unlock(&adapter->erp_lock); | |
562 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
563 | ||
564 | return retval; | |
565 | } | |
566 | ||
567 | /* | |
568 | * function: | |
569 | * | |
570 | * purpose: called if a port is to be opened | |
571 | * initiates Reopen recovery which is done | |
572 | * asynchronously | |
573 | * | |
574 | * returns: 0 - initiated action succesfully | |
575 | * <0 - failed to initiate action | |
576 | */ | |
577 | static int | |
578 | zfcp_erp_port_reopen_internal(struct zfcp_port *port, int clear_mask) | |
579 | { | |
580 | int retval; | |
581 | struct zfcp_adapter *adapter = port->adapter; | |
582 | ||
583 | debug_text_event(adapter->erp_dbf, 5, "p_ro"); | |
584 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
585 | ||
586 | ZFCP_LOG_DEBUG("reopen of port 0x%016Lx on adapter %s\n", | |
587 | port->wwpn, zfcp_get_busid_by_port(port)); | |
588 | ||
589 | zfcp_erp_port_block(port, clear_mask); | |
590 | ||
591 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { | |
592 | ZFCP_LOG_DEBUG("skipped reopen of failed port 0x%016Lx " | |
593 | "on adapter %s\n", port->wwpn, | |
594 | zfcp_get_busid_by_port(port)); | |
595 | debug_text_event(adapter->erp_dbf, 5, "p_ro_f"); | |
596 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
597 | /* ensure propagation of failed status to new devices */ | |
598 | zfcp_erp_port_failed(port); | |
599 | retval = -EIO; | |
600 | goto out; | |
601 | } | |
602 | ||
603 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, | |
604 | port->adapter, port, NULL); | |
605 | ||
606 | out: | |
607 | return retval; | |
608 | } | |
609 | ||
610 | /** | |
611 | * zfcp_erp_port_reopen - initiate reopen of a remote port | |
612 | * @port: port to be reopened | |
613 | * @clear_mask: specifies flags in port status to be cleared | |
614 | * Return: 0 on success, < 0 on error | |
615 | * | |
616 | * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures | |
617 | * correct locking. An error recovery task is initiated to do the reopen. | |
618 | * To wait for the completion of the reopen zfcp_erp_wait should be used. | |
619 | */ | |
620 | int | |
621 | zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask) | |
622 | { | |
623 | int retval; | |
624 | unsigned long flags; | |
625 | struct zfcp_adapter *adapter = port->adapter; | |
626 | ||
627 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
628 | write_lock(&adapter->erp_lock); | |
629 | retval = zfcp_erp_port_reopen_internal(port, clear_mask); | |
630 | write_unlock(&adapter->erp_lock); | |
631 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
632 | ||
633 | return retval; | |
634 | } | |
635 | ||
636 | /* | |
637 | * function: | |
638 | * | |
639 | * purpose: called if a unit is to be opened | |
640 | * initiates Reopen recovery which is done | |
641 | * asynchronously | |
642 | * | |
643 | * returns: 0 - initiated action succesfully | |
644 | * <0 - failed to initiate action | |
645 | */ | |
646 | static int | |
647 | zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask) | |
648 | { | |
649 | int retval; | |
650 | struct zfcp_adapter *adapter = unit->port->adapter; | |
651 | ||
652 | debug_text_event(adapter->erp_dbf, 5, "u_ro"); | |
653 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
654 | ZFCP_LOG_DEBUG("reopen of unit 0x%016Lx on port 0x%016Lx " | |
655 | "on adapter %s\n", unit->fcp_lun, | |
656 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); | |
657 | ||
658 | zfcp_erp_unit_block(unit, clear_mask); | |
659 | ||
660 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { | |
661 | ZFCP_LOG_DEBUG("skipped reopen of failed unit 0x%016Lx " | |
662 | "on port 0x%016Lx on adapter %s\n", | |
663 | unit->fcp_lun, unit->port->wwpn, | |
664 | zfcp_get_busid_by_unit(unit)); | |
665 | debug_text_event(adapter->erp_dbf, 5, "u_ro_f"); | |
666 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, | |
667 | sizeof (fcp_lun_t)); | |
668 | retval = -EIO; | |
669 | goto out; | |
670 | } | |
671 | ||
672 | retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, | |
673 | unit->port->adapter, unit->port, unit); | |
674 | out: | |
675 | return retval; | |
676 | } | |
677 | ||
678 | /** | |
679 | * zfcp_erp_unit_reopen - initiate reopen of a unit | |
680 | * @unit: unit to be reopened | |
681 | * @clear_mask: specifies flags in unit status to be cleared | |
682 | * Return: 0 on success, < 0 on error | |
683 | * | |
684 | * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct | |
685 | * locking. An error recovery task is initiated to do the reopen. | |
686 | * To wait for the completion of the reopen zfcp_erp_wait should be used. | |
687 | */ | |
688 | int | |
689 | zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask) | |
690 | { | |
691 | int retval; | |
692 | unsigned long flags; | |
693 | struct zfcp_adapter *adapter; | |
694 | struct zfcp_port *port; | |
695 | ||
696 | port = unit->port; | |
697 | adapter = port->adapter; | |
698 | ||
699 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
700 | write_lock(&adapter->erp_lock); | |
701 | retval = zfcp_erp_unit_reopen_internal(unit, clear_mask); | |
702 | write_unlock(&adapter->erp_lock); | |
703 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
704 | ||
705 | return retval; | |
706 | } | |
707 | ||
708 | /* | |
709 | * function: | |
710 | * | |
711 | * purpose: disable I/O, | |
712 | * return any open requests and clean them up, | |
713 | * aim: no pending and incoming I/O | |
714 | * | |
715 | * returns: | |
716 | */ | |
717 | static void | |
718 | zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask) | |
719 | { | |
720 | debug_text_event(adapter->erp_dbf, 6, "a_bl"); | |
721 | zfcp_erp_modify_adapter_status(adapter, | |
722 | ZFCP_STATUS_COMMON_UNBLOCKED | | |
723 | clear_mask, ZFCP_CLEAR); | |
724 | } | |
725 | ||
726 | /* | |
727 | * function: | |
728 | * | |
729 | * purpose: enable I/O | |
730 | * | |
731 | * returns: | |
732 | */ | |
733 | static void | |
734 | zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) | |
735 | { | |
736 | debug_text_event(adapter->erp_dbf, 6, "a_ubl"); | |
737 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); | |
738 | } | |
739 | ||
740 | /* | |
741 | * function: | |
742 | * | |
743 | * purpose: disable I/O, | |
744 | * return any open requests and clean them up, | |
745 | * aim: no pending and incoming I/O | |
746 | * | |
747 | * returns: | |
748 | */ | |
749 | static void | |
750 | zfcp_erp_port_block(struct zfcp_port *port, int clear_mask) | |
751 | { | |
752 | struct zfcp_adapter *adapter = port->adapter; | |
753 | ||
754 | debug_text_event(adapter->erp_dbf, 6, "p_bl"); | |
755 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); | |
756 | zfcp_erp_modify_port_status(port, | |
757 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, | |
758 | ZFCP_CLEAR); | |
759 | } | |
760 | ||
761 | /* | |
762 | * function: | |
763 | * | |
764 | * purpose: enable I/O | |
765 | * | |
766 | * returns: | |
767 | */ | |
768 | static void | |
769 | zfcp_erp_port_unblock(struct zfcp_port *port) | |
770 | { | |
771 | struct zfcp_adapter *adapter = port->adapter; | |
772 | ||
773 | debug_text_event(adapter->erp_dbf, 6, "p_ubl"); | |
774 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); | |
775 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); | |
776 | } | |
777 | ||
778 | /* | |
779 | * function: | |
780 | * | |
781 | * purpose: disable I/O, | |
782 | * return any open requests and clean them up, | |
783 | * aim: no pending and incoming I/O | |
784 | * | |
785 | * returns: | |
786 | */ | |
787 | static void | |
788 | zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) | |
789 | { | |
790 | struct zfcp_adapter *adapter = unit->port->adapter; | |
791 | ||
792 | debug_text_event(adapter->erp_dbf, 6, "u_bl"); | |
793 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
794 | zfcp_erp_modify_unit_status(unit, | |
795 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, | |
796 | ZFCP_CLEAR); | |
797 | } | |
798 | ||
799 | /* | |
800 | * function: | |
801 | * | |
802 | * purpose: enable I/O | |
803 | * | |
804 | * returns: | |
805 | */ | |
806 | static void | |
807 | zfcp_erp_unit_unblock(struct zfcp_unit *unit) | |
808 | { | |
809 | struct zfcp_adapter *adapter = unit->port->adapter; | |
810 | ||
811 | debug_text_event(adapter->erp_dbf, 6, "u_ubl"); | |
812 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
813 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status); | |
814 | } | |
815 | ||
816 | /* | |
817 | * function: | |
818 | * | |
819 | * purpose: | |
820 | * | |
821 | * returns: | |
822 | */ | |
823 | static void | |
824 | zfcp_erp_action_ready(struct zfcp_erp_action *erp_action) | |
825 | { | |
826 | struct zfcp_adapter *adapter = erp_action->adapter; | |
827 | ||
828 | debug_text_event(adapter->erp_dbf, 4, "a_ar"); | |
829 | debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int)); | |
830 | ||
831 | zfcp_erp_action_to_ready(erp_action); | |
832 | up(&adapter->erp_ready_sem); | |
833 | } | |
834 | ||
835 | /* | |
836 | * function: | |
837 | * | |
838 | * purpose: | |
839 | * | |
840 | * returns: <0 erp_action not found in any list | |
841 | * ZFCP_ERP_ACTION_READY erp_action is in ready list | |
842 | * ZFCP_ERP_ACTION_RUNNING erp_action is in running list | |
843 | * | |
844 | * locks: erp_lock must be held | |
845 | */ | |
846 | static int | |
847 | zfcp_erp_action_exists(struct zfcp_erp_action *erp_action) | |
848 | { | |
849 | int retval = -EINVAL; | |
850 | struct list_head *entry; | |
851 | struct zfcp_erp_action *entry_erp_action; | |
852 | struct zfcp_adapter *adapter = erp_action->adapter; | |
853 | ||
854 | /* search in running list */ | |
855 | list_for_each(entry, &adapter->erp_running_head) { | |
856 | entry_erp_action = | |
857 | list_entry(entry, struct zfcp_erp_action, list); | |
858 | if (entry_erp_action == erp_action) { | |
859 | retval = ZFCP_ERP_ACTION_RUNNING; | |
860 | goto out; | |
861 | } | |
862 | } | |
863 | /* search in ready list */ | |
864 | list_for_each(entry, &adapter->erp_ready_head) { | |
865 | entry_erp_action = | |
866 | list_entry(entry, struct zfcp_erp_action, list); | |
867 | if (entry_erp_action == erp_action) { | |
868 | retval = ZFCP_ERP_ACTION_READY; | |
869 | goto out; | |
870 | } | |
871 | } | |
872 | ||
873 | out: | |
874 | return retval; | |
875 | } | |
876 | ||
877 | /* | |
878 | * purpose: checks current status of action (timed out, dismissed, ...) | |
879 | * and does appropriate preparations (dismiss fsf request, ...) | |
880 | * | |
881 | * locks: called under erp_lock (disabled interrupts) | |
882 | * | |
883 | * returns: 0 | |
884 | */ | |
885 | static int | |
886 | zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) | |
887 | { | |
888 | int retval = 0; | |
889 | struct zfcp_fsf_req *fsf_req; | |
890 | struct zfcp_adapter *adapter = erp_action->adapter; | |
891 | ||
892 | if (erp_action->fsf_req) { | |
893 | /* take lock to ensure that request is not being deleted meanwhile */ | |
1db2c9c0 | 894 | spin_lock(&adapter->fsf_req_list_lock); |
1da177e4 LT |
895 | /* check whether fsf req does still exist */ |
896 | list_for_each_entry(fsf_req, &adapter->fsf_req_list_head, list) | |
897 | if (fsf_req == erp_action->fsf_req) | |
898 | break; | |
899 | if (fsf_req == erp_action->fsf_req) { | |
900 | /* fsf_req still exists */ | |
901 | debug_text_event(adapter->erp_dbf, 3, "a_ca_req"); | |
902 | debug_event(adapter->erp_dbf, 3, &fsf_req, | |
903 | sizeof (unsigned long)); | |
904 | /* dismiss fsf_req of timed out or dismissed erp_action */ | |
905 | if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED | | |
906 | ZFCP_STATUS_ERP_TIMEDOUT)) { | |
907 | debug_text_event(adapter->erp_dbf, 3, | |
908 | "a_ca_disreq"); | |
909 | fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; | |
910 | } | |
911 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { | |
912 | ZFCP_LOG_NORMAL("error: erp step timed out " | |
913 | "(action=%d, fsf_req=%p)\n ", | |
914 | erp_action->action, | |
915 | erp_action->fsf_req); | |
916 | } | |
917 | /* | |
918 | * If fsf_req is neither dismissed nor completed | |
919 | * then keep it running asynchronously and don't mess | |
920 | * with the association of erp_action and fsf_req. | |
921 | */ | |
922 | if (fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED | | |
923 | ZFCP_STATUS_FSFREQ_DISMISSED)) { | |
924 | /* forget about association between fsf_req | |
925 | and erp_action */ | |
926 | fsf_req->erp_action = NULL; | |
927 | erp_action->fsf_req = NULL; | |
928 | } | |
929 | } else { | |
930 | debug_text_event(adapter->erp_dbf, 3, "a_ca_gonereq"); | |
931 | /* | |
932 | * even if this fsf_req has gone, forget about | |
933 | * association between erp_action and fsf_req | |
934 | */ | |
935 | erp_action->fsf_req = NULL; | |
936 | } | |
1db2c9c0 | 937 | spin_unlock(&adapter->fsf_req_list_lock); |
1da177e4 LT |
938 | } else |
939 | debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq"); | |
940 | ||
941 | return retval; | |
942 | } | |
943 | ||
944 | /* | |
945 | * purpose: generic handler for asynchronous events related to erp_action events | |
946 | * (normal completion, time-out, dismissing, retry after | |
947 | * low memory condition) | |
948 | * | |
949 | * note: deletion of timer is not required (e.g. in case of a time-out), | |
950 | * but a second try does no harm, | |
951 | * we leave it in here to allow for greater simplification | |
952 | * | |
953 | * returns: 0 - there was an action to handle | |
954 | * !0 - otherwise | |
955 | */ | |
956 | static int | |
957 | zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action, | |
958 | unsigned long set_mask) | |
959 | { | |
960 | int retval; | |
961 | struct zfcp_adapter *adapter = erp_action->adapter; | |
962 | ||
963 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { | |
964 | debug_text_event(adapter->erp_dbf, 2, "a_asyh_ex"); | |
965 | debug_event(adapter->erp_dbf, 2, &erp_action->action, | |
966 | sizeof (int)); | |
967 | if (!(set_mask & ZFCP_STATUS_ERP_TIMEDOUT)) | |
968 | del_timer(&erp_action->timer); | |
969 | erp_action->status |= set_mask; | |
970 | zfcp_erp_action_ready(erp_action); | |
971 | retval = 0; | |
972 | } else { | |
973 | /* action is ready or gone - nothing to do */ | |
974 | debug_text_event(adapter->erp_dbf, 3, "a_asyh_gone"); | |
975 | debug_event(adapter->erp_dbf, 3, &erp_action->action, | |
976 | sizeof (int)); | |
977 | retval = 1; | |
978 | } | |
979 | ||
980 | return retval; | |
981 | } | |
982 | ||
983 | /* | |
984 | * purpose: generic handler for asynchronous events related to erp_action | |
985 | * events (normal completion, time-out, dismissing, retry after | |
986 | * low memory condition) | |
987 | * | |
988 | * note: deletion of timer is not required (e.g. in case of a time-out), | |
989 | * but a second try does no harm, | |
990 | * we leave it in here to allow for greater simplification | |
991 | * | |
992 | * returns: 0 - there was an action to handle | |
993 | * !0 - otherwise | |
994 | */ | |
995 | int | |
996 | zfcp_erp_async_handler(struct zfcp_erp_action *erp_action, | |
997 | unsigned long set_mask) | |
998 | { | |
999 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1000 | unsigned long flags; | |
1001 | int retval; | |
1002 | ||
1003 | write_lock_irqsave(&adapter->erp_lock, flags); | |
1004 | retval = zfcp_erp_async_handler_nolock(erp_action, set_mask); | |
1005 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1006 | ||
1007 | return retval; | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * purpose: is called for erp_action which was slept waiting for | |
1012 | * memory becoming avaliable, | |
1013 | * will trigger that this action will be continued | |
1014 | */ | |
1015 | static void | |
1016 | zfcp_erp_memwait_handler(unsigned long data) | |
1017 | { | |
1018 | struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; | |
1019 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1020 | ||
1021 | debug_text_event(adapter->erp_dbf, 2, "a_mwh"); | |
1022 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); | |
1023 | ||
1024 | zfcp_erp_async_handler(erp_action, 0); | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * purpose: is called if an asynchronous erp step timed out, | |
1029 | * action gets an appropriate flag and will be processed | |
1030 | * accordingly | |
1031 | */ | |
1032 | static void | |
1033 | zfcp_erp_timeout_handler(unsigned long data) | |
1034 | { | |
1035 | struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data; | |
1036 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1037 | ||
1038 | debug_text_event(adapter->erp_dbf, 2, "a_th"); | |
1039 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); | |
1040 | ||
1041 | zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT); | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * purpose: is called for an erp_action which needs to be ended | |
1046 | * though not being done, | |
1047 | * this is usually required if an higher is generated, | |
1048 | * action gets an appropriate flag and will be processed | |
1049 | * accordingly | |
1050 | * | |
1051 | * locks: erp_lock held (thus we need to call another handler variant) | |
1052 | */ | |
1053 | static int | |
1054 | zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action) | |
1055 | { | |
1056 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1057 | ||
1058 | debug_text_event(adapter->erp_dbf, 2, "a_adis"); | |
1059 | debug_event(adapter->erp_dbf, 2, &erp_action->action, sizeof (int)); | |
1060 | ||
1061 | zfcp_erp_async_handler_nolock(erp_action, ZFCP_STATUS_ERP_DISMISSED); | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | int | |
1067 | zfcp_erp_thread_setup(struct zfcp_adapter *adapter) | |
1068 | { | |
1069 | int retval = 0; | |
1070 | ||
1071 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); | |
1072 | ||
1073 | rwlock_init(&adapter->erp_lock); | |
1074 | INIT_LIST_HEAD(&adapter->erp_ready_head); | |
1075 | INIT_LIST_HEAD(&adapter->erp_running_head); | |
1076 | sema_init(&adapter->erp_ready_sem, 0); | |
1077 | ||
1078 | retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); | |
1079 | if (retval < 0) { | |
1080 | ZFCP_LOG_NORMAL("error: creation of erp thread failed for " | |
1081 | "adapter %s\n", | |
1082 | zfcp_get_busid_by_adapter(adapter)); | |
1083 | debug_text_event(adapter->erp_dbf, 5, "a_thset_fail"); | |
1084 | } else { | |
1085 | wait_event(adapter->erp_thread_wqh, | |
1086 | atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, | |
1087 | &adapter->status)); | |
1088 | debug_text_event(adapter->erp_dbf, 5, "a_thset_ok"); | |
1089 | } | |
1090 | ||
1091 | return (retval < 0); | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * function: | |
1096 | * | |
1097 | * purpose: | |
1098 | * | |
1099 | * returns: | |
1100 | * | |
1101 | * context: process (i.e. proc-fs or rmmod/insmod) | |
1102 | * | |
1103 | * note: The caller of this routine ensures that the specified | |
1104 | * adapter has been shut down and that this operation | |
1105 | * has been completed. Thus, there are no pending erp_actions | |
1106 | * which would need to be handled here. | |
1107 | */ | |
1108 | int | |
1109 | zfcp_erp_thread_kill(struct zfcp_adapter *adapter) | |
1110 | { | |
1111 | int retval = 0; | |
1112 | ||
1113 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); | |
1114 | up(&adapter->erp_ready_sem); | |
1115 | ||
1116 | wait_event(adapter->erp_thread_wqh, | |
1117 | !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, | |
1118 | &adapter->status)); | |
1119 | ||
1120 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, | |
1121 | &adapter->status); | |
1122 | ||
1123 | debug_text_event(adapter->erp_dbf, 5, "a_thki_ok"); | |
1124 | ||
1125 | return retval; | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * purpose: is run as a kernel thread, | |
1130 | * goes through list of error recovery actions of associated adapter | |
1131 | * and delegates single action to execution | |
1132 | * | |
1133 | * returns: 0 | |
1134 | */ | |
1135 | static int | |
1136 | zfcp_erp_thread(void *data) | |
1137 | { | |
1138 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; | |
1139 | struct list_head *next; | |
1140 | struct zfcp_erp_action *erp_action; | |
1141 | unsigned long flags; | |
1142 | ||
1143 | daemonize("zfcperp%s", zfcp_get_busid_by_adapter(adapter)); | |
1144 | /* Block all signals */ | |
1145 | siginitsetinv(¤t->blocked, 0); | |
1146 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); | |
1147 | debug_text_event(adapter->erp_dbf, 5, "a_th_run"); | |
1148 | wake_up(&adapter->erp_thread_wqh); | |
1149 | ||
1150 | while (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, | |
1151 | &adapter->status)) { | |
1152 | ||
1153 | write_lock_irqsave(&adapter->erp_lock, flags); | |
1154 | next = adapter->erp_ready_head.prev; | |
1155 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1156 | ||
1157 | if (next != &adapter->erp_ready_head) { | |
1158 | erp_action = | |
1159 | list_entry(next, struct zfcp_erp_action, list); | |
1160 | /* | |
1161 | * process action (incl. [re]moving it | |
1162 | * from 'ready' queue) | |
1163 | */ | |
1164 | zfcp_erp_strategy(erp_action); | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * sleep as long as there is nothing to do, i.e. | |
1169 | * no action in 'ready' queue to be processed and | |
1170 | * thread is not to be killed | |
1171 | */ | |
1172 | down_interruptible(&adapter->erp_ready_sem); | |
1173 | debug_text_event(adapter->erp_dbf, 5, "a_th_woken"); | |
1174 | } | |
1175 | ||
1176 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); | |
1177 | debug_text_event(adapter->erp_dbf, 5, "a_th_stop"); | |
1178 | wake_up(&adapter->erp_thread_wqh); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * function: | |
1185 | * | |
1186 | * purpose: drives single error recovery action and schedules higher and | |
1187 | * subordinate actions, if necessary | |
1188 | * | |
1189 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
1190 | * ZFCP_ERP_SUCCEEDED - action finished successfully (deqd) | |
1191 | * ZFCP_ERP_FAILED - action finished unsuccessfully (deqd) | |
1192 | * ZFCP_ERP_EXIT - action finished (dequeued), offline | |
1193 | * ZFCP_ERP_DISMISSED - action canceled (dequeued) | |
1194 | */ | |
1195 | static int | |
1196 | zfcp_erp_strategy(struct zfcp_erp_action *erp_action) | |
1197 | { | |
1198 | int retval = 0; | |
1199 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1200 | struct zfcp_port *port = erp_action->port; | |
1201 | struct zfcp_unit *unit = erp_action->unit; | |
1202 | int action = erp_action->action; | |
1203 | u32 status = erp_action->status; | |
1204 | unsigned long flags; | |
1205 | ||
1206 | /* serialise dismissing, timing out, moving, enqueueing */ | |
1207 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1208 | write_lock(&adapter->erp_lock); | |
1209 | ||
1210 | /* dequeue dismissed action and leave, if required */ | |
1211 | retval = zfcp_erp_strategy_check_action(erp_action, retval); | |
1212 | if (retval == ZFCP_ERP_DISMISSED) { | |
1213 | debug_text_event(adapter->erp_dbf, 4, "a_st_dis1"); | |
1214 | goto unlock; | |
1215 | } | |
1216 | ||
1217 | /* | |
1218 | * move action to 'running' queue before processing it | |
1219 | * (to avoid a race condition regarding moving the | |
1220 | * action to the 'running' queue and back) | |
1221 | */ | |
1222 | zfcp_erp_action_to_running(erp_action); | |
1223 | ||
1224 | /* | |
1225 | * try to process action as far as possible, | |
1226 | * no lock to allow for blocking operations (kmalloc, qdio, ...), | |
1227 | * afterwards the lock is required again for the following reasons: | |
1228 | * - dequeueing of finished action and enqueueing of | |
1229 | * follow-up actions must be atomic so that any other | |
1230 | * reopen-routine does not believe there is nothing to do | |
1231 | * and that it is safe to enqueue something else, | |
1232 | * - we want to force any control thread which is dismissing | |
1233 | * actions to finish this before we decide about | |
1234 | * necessary steps to be taken here further | |
1235 | */ | |
1236 | write_unlock(&adapter->erp_lock); | |
1237 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1238 | retval = zfcp_erp_strategy_do_action(erp_action); | |
1239 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1240 | write_lock(&adapter->erp_lock); | |
1241 | ||
1242 | /* | |
1243 | * check for dismissed status again to avoid follow-up actions, | |
1244 | * failing of targets and so on for dismissed actions | |
1245 | */ | |
1246 | retval = zfcp_erp_strategy_check_action(erp_action, retval); | |
1247 | ||
1248 | switch (retval) { | |
1249 | case ZFCP_ERP_DISMISSED: | |
1250 | /* leave since this action has ridden to its ancestors */ | |
1251 | debug_text_event(adapter->erp_dbf, 6, "a_st_dis2"); | |
1252 | goto unlock; | |
1253 | case ZFCP_ERP_NOMEM: | |
1254 | /* no memory to continue immediately, let it sleep */ | |
1255 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { | |
1256 | ++adapter->erp_low_mem_count; | |
1257 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; | |
1258 | } | |
1259 | /* This condition is true if there is no memory available | |
1260 | for any erp_action on this adapter. This implies that there | |
1261 | are no elements in the memory pool(s) left for erp_actions. | |
1262 | This might happen if an erp_action that used a memory pool | |
1263 | element was timed out. | |
1264 | */ | |
1265 | if (adapter->erp_total_count == adapter->erp_low_mem_count) { | |
1266 | debug_text_event(adapter->erp_dbf, 3, "a_st_lowmem"); | |
1267 | ZFCP_LOG_NORMAL("error: no mempool elements available, " | |
1268 | "restarting I/O on adapter %s " | |
1269 | "to free mempool\n", | |
1270 | zfcp_get_busid_by_adapter(adapter)); | |
1271 | zfcp_erp_adapter_reopen_internal(adapter, 0); | |
1272 | } else { | |
1273 | debug_text_event(adapter->erp_dbf, 2, "a_st_memw"); | |
1274 | retval = zfcp_erp_strategy_memwait(erp_action); | |
1275 | } | |
1276 | goto unlock; | |
1277 | case ZFCP_ERP_CONTINUES: | |
1278 | /* leave since this action runs asynchronously */ | |
1279 | debug_text_event(adapter->erp_dbf, 6, "a_st_cont"); | |
1280 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1281 | --adapter->erp_low_mem_count; | |
1282 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
1283 | } | |
1284 | goto unlock; | |
1285 | } | |
1286 | /* ok, finished action (whatever its result is) */ | |
1287 | ||
1288 | /* check for unrecoverable targets */ | |
1289 | retval = zfcp_erp_strategy_check_target(erp_action, retval); | |
1290 | ||
1291 | /* action must be dequeued (here to allow for further ones) */ | |
1292 | zfcp_erp_action_dequeue(erp_action); | |
1293 | ||
1294 | /* | |
1295 | * put this target through the erp mill again if someone has | |
1296 | * requested to change the status of a target being online | |
1297 | * to offline or the other way around | |
1298 | * (old retval is preserved if nothing has to be done here) | |
1299 | */ | |
1300 | retval = zfcp_erp_strategy_statechange(action, status, adapter, | |
1301 | port, unit, retval); | |
1302 | ||
1303 | /* | |
1304 | * leave if target is in permanent error state or if | |
1305 | * action is repeated in order to process state change | |
1306 | */ | |
1307 | if (retval == ZFCP_ERP_EXIT) { | |
1308 | debug_text_event(adapter->erp_dbf, 2, "a_st_exit"); | |
1309 | goto unlock; | |
1310 | } | |
1311 | ||
1312 | /* trigger follow up actions */ | |
1313 | zfcp_erp_strategy_followup_actions(action, adapter, port, unit, retval); | |
1314 | ||
1315 | unlock: | |
1316 | write_unlock(&adapter->erp_lock); | |
1317 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1318 | ||
1319 | if (retval != ZFCP_ERP_CONTINUES) | |
1320 | zfcp_erp_action_cleanup(action, adapter, port, unit, retval); | |
1321 | ||
1322 | /* | |
1323 | * a few tasks remain when the erp queues are empty | |
1324 | * (don't do that if the last action evaluated was dismissed | |
1325 | * since this clearly indicates that there is more to come) : | |
1326 | * - close the name server port if it is open yet | |
1327 | * (enqueues another [probably] final action) | |
1328 | * - otherwise, wake up whoever wants to be woken when we are | |
1329 | * done with erp | |
1330 | */ | |
1331 | if (retval != ZFCP_ERP_DISMISSED) | |
1332 | zfcp_erp_strategy_check_queues(adapter); | |
1333 | ||
1334 | debug_text_event(adapter->erp_dbf, 6, "a_st_done"); | |
1335 | ||
1336 | return retval; | |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * function: | |
1341 | * | |
1342 | * purpose: | |
1343 | * | |
1344 | * returns: ZFCP_ERP_DISMISSED - if action has been dismissed | |
1345 | * retval - otherwise | |
1346 | */ | |
1347 | static int | |
1348 | zfcp_erp_strategy_check_action(struct zfcp_erp_action *erp_action, int retval) | |
1349 | { | |
1350 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1351 | ||
1352 | zfcp_erp_strategy_check_fsfreq(erp_action); | |
1353 | ||
1354 | debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int)); | |
1355 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { | |
1356 | debug_text_event(adapter->erp_dbf, 3, "a_stcd_dis"); | |
1357 | zfcp_erp_action_dequeue(erp_action); | |
1358 | retval = ZFCP_ERP_DISMISSED; | |
1359 | } else | |
1360 | debug_text_event(adapter->erp_dbf, 5, "a_stcd_nodis"); | |
1361 | ||
1362 | return retval; | |
1363 | } | |
1364 | ||
1365 | /* | |
1366 | * function: | |
1367 | * | |
1368 | * purpose: | |
1369 | * | |
1370 | * returns: | |
1371 | */ | |
1372 | static int | |
1373 | zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) | |
1374 | { | |
1375 | int retval = ZFCP_ERP_FAILED; | |
1376 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1377 | ||
1378 | /* | |
1379 | * try to execute/continue action as far as possible, | |
1380 | * note: no lock in subsequent strategy routines | |
1381 | * (this allows these routine to call schedule, e.g. | |
1382 | * kmalloc with such flags or qdio_initialize & friends) | |
1383 | * Note: in case of timeout, the seperate strategies will fail | |
1384 | * anyhow. No need for a special action. Even worse, a nameserver | |
1385 | * failure would not wake up waiting ports without the call. | |
1386 | */ | |
1387 | switch (erp_action->action) { | |
1388 | ||
1389 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1390 | retval = zfcp_erp_adapter_strategy(erp_action); | |
1391 | break; | |
1392 | ||
1393 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1394 | retval = zfcp_erp_port_forced_strategy(erp_action); | |
1395 | break; | |
1396 | ||
1397 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1398 | retval = zfcp_erp_port_strategy(erp_action); | |
1399 | break; | |
1400 | ||
1401 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1402 | retval = zfcp_erp_unit_strategy(erp_action); | |
1403 | break; | |
1404 | ||
1405 | default: | |
1406 | debug_text_exception(adapter->erp_dbf, 1, "a_stda_bug"); | |
1407 | debug_event(adapter->erp_dbf, 1, &erp_action->action, | |
1408 | sizeof (int)); | |
1409 | ZFCP_LOG_NORMAL("bug: unknown erp action requested on " | |
1410 | "adapter %s (action=%d)\n", | |
1411 | zfcp_get_busid_by_adapter(erp_action->adapter), | |
1412 | erp_action->action); | |
1413 | } | |
1414 | ||
1415 | return retval; | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * function: | |
1420 | * | |
1421 | * purpose: triggers retry of this action after a certain amount of time | |
1422 | * by means of timer provided by erp_action | |
1423 | * | |
1424 | * returns: ZFCP_ERP_CONTINUES - erp_action sleeps in erp running queue | |
1425 | */ | |
1426 | static int | |
1427 | zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) | |
1428 | { | |
1429 | int retval = ZFCP_ERP_CONTINUES; | |
1430 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1431 | ||
1432 | debug_text_event(adapter->erp_dbf, 6, "a_mwinit"); | |
1433 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); | |
1434 | init_timer(&erp_action->timer); | |
1435 | erp_action->timer.function = zfcp_erp_memwait_handler; | |
1436 | erp_action->timer.data = (unsigned long) erp_action; | |
1437 | erp_action->timer.expires = jiffies + ZFCP_ERP_MEMWAIT_TIMEOUT; | |
1438 | add_timer(&erp_action->timer); | |
1439 | ||
1440 | return retval; | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * function: zfcp_erp_adapter_failed | |
1445 | * | |
1446 | * purpose: sets the adapter and all underlying devices to ERP_FAILED | |
1447 | * | |
1448 | */ | |
1449 | void | |
1450 | zfcp_erp_adapter_failed(struct zfcp_adapter *adapter) | |
1451 | { | |
1452 | zfcp_erp_modify_adapter_status(adapter, | |
1453 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
1454 | ZFCP_LOG_NORMAL("adapter erp failed on adapter %s\n", | |
1455 | zfcp_get_busid_by_adapter(adapter)); | |
1456 | debug_text_event(adapter->erp_dbf, 2, "a_afail"); | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * function: zfcp_erp_port_failed | |
1461 | * | |
1462 | * purpose: sets the port and all underlying devices to ERP_FAILED | |
1463 | * | |
1464 | */ | |
1465 | void | |
1466 | zfcp_erp_port_failed(struct zfcp_port *port) | |
1467 | { | |
1468 | zfcp_erp_modify_port_status(port, | |
1469 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
1470 | ||
1471 | if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) | |
1472 | ZFCP_LOG_NORMAL("port erp failed (adapter %s, " | |
1473 | "port d_id=0x%08x)\n", | |
1474 | zfcp_get_busid_by_port(port), port->d_id); | |
1475 | else | |
1476 | ZFCP_LOG_NORMAL("port erp failed (adapter %s, wwpn=0x%016Lx)\n", | |
1477 | zfcp_get_busid_by_port(port), port->wwpn); | |
1478 | ||
1479 | debug_text_event(port->adapter->erp_dbf, 2, "p_pfail"); | |
1480 | debug_event(port->adapter->erp_dbf, 2, &port->wwpn, sizeof (wwn_t)); | |
1481 | } | |
1482 | ||
1483 | /* | |
1484 | * function: zfcp_erp_unit_failed | |
1485 | * | |
1486 | * purpose: sets the unit to ERP_FAILED | |
1487 | * | |
1488 | */ | |
1489 | void | |
1490 | zfcp_erp_unit_failed(struct zfcp_unit *unit) | |
1491 | { | |
1492 | zfcp_erp_modify_unit_status(unit, | |
1493 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
1494 | ||
1495 | ZFCP_LOG_NORMAL("unit erp failed on unit 0x%016Lx on port 0x%016Lx " | |
1496 | " on adapter %s\n", unit->fcp_lun, | |
1497 | unit->port->wwpn, zfcp_get_busid_by_unit(unit)); | |
1498 | debug_text_event(unit->port->adapter->erp_dbf, 2, "u_ufail"); | |
1499 | debug_event(unit->port->adapter->erp_dbf, 2, | |
1500 | &unit->fcp_lun, sizeof (fcp_lun_t)); | |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * function: zfcp_erp_strategy_check_target | |
1505 | * | |
1506 | * purpose: increments the erp action count on the device currently in | |
1507 | * recovery if the action failed or resets the count in case of | |
1508 | * success. If a maximum count is exceeded the device is marked | |
1509 | * as ERP_FAILED. | |
1510 | * The 'blocked' state of a target which has been recovered | |
1511 | * successfully is reset. | |
1512 | * | |
1513 | * returns: ZFCP_ERP_CONTINUES - action continues (not considered) | |
1514 | * ZFCP_ERP_SUCCEEDED - action finished successfully | |
1515 | * ZFCP_ERP_EXIT - action failed and will not continue | |
1516 | */ | |
1517 | static int | |
1518 | zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, int result) | |
1519 | { | |
1520 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1521 | struct zfcp_port *port = erp_action->port; | |
1522 | struct zfcp_unit *unit = erp_action->unit; | |
1523 | ||
1524 | debug_text_event(adapter->erp_dbf, 5, "a_stct_norm"); | |
1525 | debug_event(adapter->erp_dbf, 5, &erp_action->action, sizeof (int)); | |
1526 | debug_event(adapter->erp_dbf, 5, &result, sizeof (int)); | |
1527 | ||
1528 | switch (erp_action->action) { | |
1529 | ||
1530 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1531 | result = zfcp_erp_strategy_check_unit(unit, result); | |
1532 | break; | |
1533 | ||
1534 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1535 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1536 | result = zfcp_erp_strategy_check_port(port, result); | |
1537 | break; | |
1538 | ||
1539 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1540 | result = zfcp_erp_strategy_check_adapter(adapter, result); | |
1541 | break; | |
1542 | } | |
1543 | ||
1544 | return result; | |
1545 | } | |
1546 | ||
1547 | /* | |
1548 | * function: | |
1549 | * | |
1550 | * purpose: | |
1551 | * | |
1552 | * returns: | |
1553 | */ | |
1554 | static int | |
1555 | zfcp_erp_strategy_statechange(int action, | |
1556 | u32 status, | |
1557 | struct zfcp_adapter *adapter, | |
1558 | struct zfcp_port *port, | |
1559 | struct zfcp_unit *unit, int retval) | |
1560 | { | |
1561 | debug_text_event(adapter->erp_dbf, 3, "a_stsc"); | |
1562 | debug_event(adapter->erp_dbf, 3, &action, sizeof (int)); | |
1563 | ||
1564 | switch (action) { | |
1565 | ||
1566 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1567 | if (zfcp_erp_strategy_statechange_detected(&adapter->status, | |
1568 | status)) { | |
1569 | zfcp_erp_adapter_reopen_internal(adapter, ZFCP_STATUS_COMMON_ERP_FAILED); | |
1570 | retval = ZFCP_ERP_EXIT; | |
1571 | } | |
1572 | break; | |
1573 | ||
1574 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1575 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1576 | if (zfcp_erp_strategy_statechange_detected(&port->status, | |
1577 | status)) { | |
1578 | zfcp_erp_port_reopen_internal(port, ZFCP_STATUS_COMMON_ERP_FAILED); | |
1579 | retval = ZFCP_ERP_EXIT; | |
1580 | } | |
1581 | break; | |
1582 | ||
1583 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1584 | if (zfcp_erp_strategy_statechange_detected(&unit->status, | |
1585 | status)) { | |
1586 | zfcp_erp_unit_reopen_internal(unit, ZFCP_STATUS_COMMON_ERP_FAILED); | |
1587 | retval = ZFCP_ERP_EXIT; | |
1588 | } | |
1589 | break; | |
1590 | } | |
1591 | ||
1592 | return retval; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * function: | |
1597 | * | |
1598 | * purpose: | |
1599 | * | |
1600 | * returns: | |
1601 | */ | |
1602 | static inline int | |
1603 | zfcp_erp_strategy_statechange_detected(atomic_t * target_status, u32 erp_status) | |
1604 | { | |
1605 | return | |
1606 | /* take it online */ | |
1607 | (atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && | |
1608 | (ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)) || | |
1609 | /* take it offline */ | |
1610 | (!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) && | |
1611 | !(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)); | |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * function: | |
1616 | * | |
1617 | * purpose: | |
1618 | * | |
1619 | * returns: | |
1620 | */ | |
1621 | static int | |
1622 | zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) | |
1623 | { | |
1624 | debug_text_event(unit->port->adapter->erp_dbf, 5, "u_stct"); | |
1625 | debug_event(unit->port->adapter->erp_dbf, 5, &unit->fcp_lun, | |
1626 | sizeof (fcp_lun_t)); | |
1627 | ||
1628 | switch (result) { | |
1629 | case ZFCP_ERP_SUCCEEDED : | |
1630 | atomic_set(&unit->erp_counter, 0); | |
1631 | zfcp_erp_unit_unblock(unit); | |
1632 | break; | |
1633 | case ZFCP_ERP_FAILED : | |
1634 | atomic_inc(&unit->erp_counter); | |
1635 | if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) | |
1636 | zfcp_erp_unit_failed(unit); | |
1637 | break; | |
1638 | case ZFCP_ERP_EXIT : | |
1639 | /* nothing */ | |
1640 | break; | |
1641 | } | |
1642 | ||
1643 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) { | |
1644 | zfcp_erp_unit_block(unit, 0); /* for ZFCP_ERP_SUCCEEDED */ | |
1645 | result = ZFCP_ERP_EXIT; | |
1646 | } | |
1647 | ||
1648 | return result; | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * function: | |
1653 | * | |
1654 | * purpose: | |
1655 | * | |
1656 | * returns: | |
1657 | */ | |
1658 | static int | |
1659 | zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) | |
1660 | { | |
1661 | debug_text_event(port->adapter->erp_dbf, 5, "p_stct"); | |
1662 | debug_event(port->adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
1663 | ||
1664 | switch (result) { | |
1665 | case ZFCP_ERP_SUCCEEDED : | |
1666 | atomic_set(&port->erp_counter, 0); | |
1667 | zfcp_erp_port_unblock(port); | |
1668 | break; | |
1669 | case ZFCP_ERP_FAILED : | |
1670 | atomic_inc(&port->erp_counter); | |
1671 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) | |
1672 | zfcp_erp_port_failed(port); | |
1673 | break; | |
1674 | case ZFCP_ERP_EXIT : | |
1675 | /* nothing */ | |
1676 | break; | |
1677 | } | |
1678 | ||
1679 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { | |
1680 | zfcp_erp_port_block(port, 0); /* for ZFCP_ERP_SUCCEEDED */ | |
1681 | result = ZFCP_ERP_EXIT; | |
1682 | } | |
1683 | ||
1684 | return result; | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * function: | |
1689 | * | |
1690 | * purpose: | |
1691 | * | |
1692 | * returns: | |
1693 | */ | |
1694 | static int | |
1695 | zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, int result) | |
1696 | { | |
1697 | debug_text_event(adapter->erp_dbf, 5, "a_stct"); | |
1698 | ||
1699 | switch (result) { | |
1700 | case ZFCP_ERP_SUCCEEDED : | |
1701 | atomic_set(&adapter->erp_counter, 0); | |
1702 | zfcp_erp_adapter_unblock(adapter); | |
1703 | break; | |
1704 | case ZFCP_ERP_FAILED : | |
1705 | atomic_inc(&adapter->erp_counter); | |
1706 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) | |
1707 | zfcp_erp_adapter_failed(adapter); | |
1708 | break; | |
1709 | case ZFCP_ERP_EXIT : | |
1710 | /* nothing */ | |
1711 | break; | |
1712 | } | |
1713 | ||
1714 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { | |
1715 | zfcp_erp_adapter_block(adapter, 0); /* for ZFCP_ERP_SUCCEEDED */ | |
1716 | result = ZFCP_ERP_EXIT; | |
1717 | } | |
1718 | ||
1719 | return result; | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * function: | |
1724 | * | |
1725 | * purpose: remaining things in good cases, | |
1726 | * escalation in bad cases | |
1727 | * | |
1728 | * returns: | |
1729 | */ | |
1730 | static int | |
1731 | zfcp_erp_strategy_followup_actions(int action, | |
1732 | struct zfcp_adapter *adapter, | |
1733 | struct zfcp_port *port, | |
1734 | struct zfcp_unit *unit, int status) | |
1735 | { | |
1736 | debug_text_event(adapter->erp_dbf, 5, "a_stfol"); | |
1737 | debug_event(adapter->erp_dbf, 5, &action, sizeof (int)); | |
1738 | ||
1739 | /* initiate follow-up actions depending on success of finished action */ | |
1740 | switch (action) { | |
1741 | ||
1742 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1743 | if (status == ZFCP_ERP_SUCCEEDED) | |
1744 | zfcp_erp_port_reopen_all_internal(adapter, 0); | |
1745 | else | |
1746 | zfcp_erp_adapter_reopen_internal(adapter, 0); | |
1747 | break; | |
1748 | ||
1749 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1750 | if (status == ZFCP_ERP_SUCCEEDED) | |
1751 | zfcp_erp_port_reopen_internal(port, 0); | |
1752 | else | |
1753 | zfcp_erp_adapter_reopen_internal(adapter, 0); | |
1754 | break; | |
1755 | ||
1756 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1757 | if (status == ZFCP_ERP_SUCCEEDED) | |
1758 | zfcp_erp_unit_reopen_all_internal(port, 0); | |
1759 | else | |
1760 | zfcp_erp_port_forced_reopen_internal(port, 0); | |
1761 | break; | |
1762 | ||
1763 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1764 | if (status == ZFCP_ERP_SUCCEEDED) ; /* no further action */ | |
1765 | else | |
1766 | zfcp_erp_port_reopen_internal(unit->port, 0); | |
1767 | break; | |
1768 | } | |
1769 | ||
1770 | return 0; | |
1771 | } | |
1772 | ||
1773 | /* | |
1774 | * function: | |
1775 | * | |
1776 | * purpose: | |
1777 | * | |
1778 | * returns: | |
1779 | */ | |
1780 | static int | |
1781 | zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter) | |
1782 | { | |
1783 | unsigned long flags; | |
1784 | ||
1785 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1786 | read_lock(&adapter->erp_lock); | |
1787 | if (list_empty(&adapter->erp_ready_head) && | |
1788 | list_empty(&adapter->erp_running_head)) { | |
1789 | debug_text_event(adapter->erp_dbf, 4, "a_cq_wake"); | |
1790 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, | |
1791 | &adapter->status); | |
1792 | wake_up(&adapter->erp_done_wqh); | |
1793 | } else | |
1794 | debug_text_event(adapter->erp_dbf, 5, "a_cq_notempty"); | |
1795 | read_unlock(&adapter->erp_lock); | |
1796 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1797 | ||
1798 | return 0; | |
1799 | } | |
1800 | ||
1801 | /** | |
1802 | * zfcp_erp_wait - wait for completion of error recovery on an adapter | |
1803 | * @adapter: adapter for which to wait for completion of its error recovery | |
1804 | * Return: 0 | |
1805 | */ | |
1806 | int | |
1807 | zfcp_erp_wait(struct zfcp_adapter *adapter) | |
1808 | { | |
1809 | int retval = 0; | |
1810 | ||
1811 | wait_event(adapter->erp_done_wqh, | |
1812 | !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, | |
1813 | &adapter->status)); | |
1814 | ||
1815 | return retval; | |
1816 | } | |
1817 | ||
1818 | /* | |
1819 | * function: zfcp_erp_modify_adapter_status | |
1820 | * | |
1821 | * purpose: | |
1822 | * | |
1823 | */ | |
1824 | void | |
1825 | zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, | |
1826 | u32 mask, int set_or_clear) | |
1827 | { | |
1828 | struct zfcp_port *port; | |
1829 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1830 | ||
1831 | if (set_or_clear == ZFCP_SET) { | |
1832 | atomic_set_mask(mask, &adapter->status); | |
1833 | debug_text_event(adapter->erp_dbf, 3, "a_mod_as_s"); | |
1834 | } else { | |
1835 | atomic_clear_mask(mask, &adapter->status); | |
1836 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1837 | atomic_set(&adapter->erp_counter, 0); | |
1838 | debug_text_event(adapter->erp_dbf, 3, "a_mod_as_c"); | |
1839 | } | |
1840 | debug_event(adapter->erp_dbf, 3, &mask, sizeof (u32)); | |
1841 | ||
1842 | /* Deal with all underlying devices, only pass common_mask */ | |
1843 | if (common_mask) | |
1844 | list_for_each_entry(port, &adapter->port_list_head, list) | |
1845 | zfcp_erp_modify_port_status(port, common_mask, | |
1846 | set_or_clear); | |
1847 | } | |
1848 | ||
1849 | /* | |
1850 | * function: zfcp_erp_modify_port_status | |
1851 | * | |
1852 | * purpose: sets the port and all underlying devices to ERP_FAILED | |
1853 | * | |
1854 | */ | |
1855 | void | |
1856 | zfcp_erp_modify_port_status(struct zfcp_port *port, u32 mask, int set_or_clear) | |
1857 | { | |
1858 | struct zfcp_unit *unit; | |
1859 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1860 | ||
1861 | if (set_or_clear == ZFCP_SET) { | |
1862 | atomic_set_mask(mask, &port->status); | |
1863 | debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_s"); | |
1864 | } else { | |
1865 | atomic_clear_mask(mask, &port->status); | |
1866 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1867 | atomic_set(&port->erp_counter, 0); | |
1868 | debug_text_event(port->adapter->erp_dbf, 3, "p_mod_ps_c"); | |
1869 | } | |
1870 | debug_event(port->adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); | |
1871 | debug_event(port->adapter->erp_dbf, 3, &mask, sizeof (u32)); | |
1872 | ||
1873 | /* Modify status of all underlying devices, only pass common mask */ | |
1874 | if (common_mask) | |
1875 | list_for_each_entry(unit, &port->unit_list_head, list) | |
1876 | zfcp_erp_modify_unit_status(unit, common_mask, | |
1877 | set_or_clear); | |
1878 | } | |
1879 | ||
1880 | /* | |
1881 | * function: zfcp_erp_modify_unit_status | |
1882 | * | |
1883 | * purpose: sets the unit to ERP_FAILED | |
1884 | * | |
1885 | */ | |
1886 | void | |
1887 | zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u32 mask, int set_or_clear) | |
1888 | { | |
1889 | if (set_or_clear == ZFCP_SET) { | |
1890 | atomic_set_mask(mask, &unit->status); | |
1891 | debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_s"); | |
1892 | } else { | |
1893 | atomic_clear_mask(mask, &unit->status); | |
1894 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
1895 | atomic_set(&unit->erp_counter, 0); | |
1896 | } | |
1897 | debug_text_event(unit->port->adapter->erp_dbf, 3, "u_mod_us_c"); | |
1898 | } | |
1899 | debug_event(unit->port->adapter->erp_dbf, 3, &unit->fcp_lun, | |
1900 | sizeof (fcp_lun_t)); | |
1901 | debug_event(unit->port->adapter->erp_dbf, 3, &mask, sizeof (u32)); | |
1902 | } | |
1903 | ||
1904 | /* | |
1905 | * function: | |
1906 | * | |
1907 | * purpose: Wrappper for zfcp_erp_port_reopen_all_internal | |
1908 | * used to ensure the correct locking | |
1909 | * | |
1910 | * returns: 0 - initiated action succesfully | |
1911 | * <0 - failed to initiate action | |
1912 | */ | |
1913 | int | |
1914 | zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, int clear_mask) | |
1915 | { | |
1916 | int retval; | |
1917 | unsigned long flags; | |
1918 | ||
1919 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1920 | write_lock(&adapter->erp_lock); | |
1921 | retval = zfcp_erp_port_reopen_all_internal(adapter, clear_mask); | |
1922 | write_unlock(&adapter->erp_lock); | |
1923 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1924 | ||
1925 | return retval; | |
1926 | } | |
1927 | ||
1928 | /* | |
1929 | * function: | |
1930 | * | |
1931 | * purpose: | |
1932 | * | |
1933 | * returns: FIXME | |
1934 | */ | |
1935 | static int | |
1936 | zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *adapter, int clear_mask) | |
1937 | { | |
1938 | int retval = 0; | |
1939 | struct zfcp_port *port; | |
1940 | ||
1941 | list_for_each_entry(port, &adapter->port_list_head, list) | |
1942 | if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) | |
1943 | zfcp_erp_port_reopen_internal(port, clear_mask); | |
1944 | ||
1945 | return retval; | |
1946 | } | |
1947 | ||
1948 | /* | |
1949 | * function: | |
1950 | * | |
1951 | * purpose: | |
1952 | * | |
1953 | * returns: FIXME | |
1954 | */ | |
1955 | static int | |
1956 | zfcp_erp_unit_reopen_all_internal(struct zfcp_port *port, int clear_mask) | |
1957 | { | |
1958 | int retval = 0; | |
1959 | struct zfcp_unit *unit; | |
1960 | ||
1961 | list_for_each_entry(unit, &port->unit_list_head, list) | |
1962 | zfcp_erp_unit_reopen_internal(unit, clear_mask); | |
1963 | ||
1964 | return retval; | |
1965 | } | |
1966 | ||
1967 | /* | |
1968 | * function: | |
1969 | * | |
1970 | * purpose: this routine executes the 'Reopen Adapter' action | |
1971 | * (the entire action is processed synchronously, since | |
1972 | * there are no actions which might be run concurrently | |
1973 | * per definition) | |
1974 | * | |
1975 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully | |
1976 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
1977 | */ | |
1978 | static int | |
1979 | zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action) | |
1980 | { | |
1981 | int retval; | |
1982 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1983 | ||
1984 | retval = zfcp_erp_adapter_strategy_close(erp_action); | |
1985 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
1986 | retval = ZFCP_ERP_EXIT; | |
1987 | else | |
1988 | retval = zfcp_erp_adapter_strategy_open(erp_action); | |
1989 | ||
1990 | debug_text_event(adapter->erp_dbf, 3, "a_ast/ret"); | |
1991 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); | |
1992 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); | |
1993 | ||
1994 | if (retval == ZFCP_ERP_FAILED) { | |
1995 | ZFCP_LOG_INFO("Waiting to allow the adapter %s " | |
1996 | "to recover itself\n", | |
1997 | zfcp_get_busid_by_adapter(adapter)); | |
1998 | msleep(jiffies_to_msecs(ZFCP_TYPE2_RECOVERY_TIME)); | |
1999 | } | |
2000 | ||
2001 | return retval; | |
2002 | } | |
2003 | ||
2004 | /* | |
2005 | * function: | |
2006 | * | |
2007 | * purpose: | |
2008 | * | |
2009 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully | |
2010 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2011 | */ | |
2012 | static int | |
2013 | zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *erp_action) | |
2014 | { | |
2015 | int retval; | |
2016 | ||
2017 | atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, | |
2018 | &erp_action->adapter->status); | |
2019 | retval = zfcp_erp_adapter_strategy_generic(erp_action, 1); | |
2020 | atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, | |
2021 | &erp_action->adapter->status); | |
2022 | ||
2023 | return retval; | |
2024 | } | |
2025 | ||
2026 | /* | |
2027 | * function: | |
2028 | * | |
2029 | * purpose: | |
2030 | * | |
2031 | * returns: ZFCP_ERP_SUCCEEDED - action finished successfully | |
2032 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2033 | */ | |
2034 | static int | |
2035 | zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *erp_action) | |
2036 | { | |
2037 | int retval; | |
2038 | ||
2039 | atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, | |
2040 | &erp_action->adapter->status); | |
2041 | retval = zfcp_erp_adapter_strategy_generic(erp_action, 0); | |
2042 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, | |
2043 | &erp_action->adapter->status); | |
2044 | ||
2045 | return retval; | |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * function: zfcp_register_adapter | |
2050 | * | |
2051 | * purpose: allocate the irq associated with this devno and register | |
2052 | * the FSF adapter with the SCSI stack | |
2053 | * | |
2054 | * returns: | |
2055 | */ | |
2056 | static int | |
2057 | zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close) | |
2058 | { | |
2059 | int retval = ZFCP_ERP_SUCCEEDED; | |
2060 | ||
2061 | if (close) | |
2062 | goto close_only; | |
2063 | ||
2064 | retval = zfcp_erp_adapter_strategy_open_qdio(erp_action); | |
2065 | if (retval != ZFCP_ERP_SUCCEEDED) | |
2066 | goto failed_qdio; | |
2067 | ||
2068 | retval = zfcp_erp_adapter_strategy_open_fsf(erp_action); | |
2069 | if (retval != ZFCP_ERP_SUCCEEDED) | |
2070 | goto failed_openfcp; | |
2071 | ||
2072 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status); | |
2073 | goto out; | |
2074 | ||
2075 | close_only: | |
2076 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, | |
2077 | &erp_action->adapter->status); | |
2078 | ||
2079 | failed_openfcp: | |
2080 | zfcp_erp_adapter_strategy_close_qdio(erp_action); | |
2081 | zfcp_erp_adapter_strategy_close_fsf(erp_action); | |
2082 | failed_qdio: | |
2083 | out: | |
2084 | return retval; | |
2085 | } | |
2086 | ||
2087 | /* | |
2088 | * function: zfcp_qdio_init | |
2089 | * | |
2090 | * purpose: setup QDIO operation for specified adapter | |
2091 | * | |
2092 | * returns: 0 - successful setup | |
2093 | * !0 - failed setup | |
2094 | */ | |
2095 | int | |
2096 | zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action) | |
2097 | { | |
2098 | int retval; | |
2099 | int i; | |
2100 | volatile struct qdio_buffer_element *sbale; | |
2101 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2102 | ||
2103 | if (atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { | |
2104 | ZFCP_LOG_NORMAL("bug: second attempt to set up QDIO on " | |
2105 | "adapter %s\n", | |
2106 | zfcp_get_busid_by_adapter(adapter)); | |
2107 | goto failed_sanity; | |
2108 | } | |
2109 | ||
2110 | if (qdio_establish(&adapter->qdio_init_data) != 0) { | |
2111 | ZFCP_LOG_INFO("error: establishment of QDIO queues failed " | |
2112 | "on adapter %s\n", | |
2113 | zfcp_get_busid_by_adapter(adapter)); | |
2114 | goto failed_qdio_establish; | |
2115 | } | |
2116 | debug_text_event(adapter->erp_dbf, 3, "qdio_est"); | |
2117 | ||
2118 | if (qdio_activate(adapter->ccw_device, 0) != 0) { | |
2119 | ZFCP_LOG_INFO("error: activation of QDIO queues failed " | |
2120 | "on adapter %s\n", | |
2121 | zfcp_get_busid_by_adapter(adapter)); | |
2122 | goto failed_qdio_activate; | |
2123 | } | |
2124 | debug_text_event(adapter->erp_dbf, 3, "qdio_act"); | |
2125 | ||
2126 | /* | |
2127 | * put buffers into response queue, | |
2128 | */ | |
2129 | for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) { | |
2130 | sbale = &(adapter->response_queue.buffer[i]->element[0]); | |
2131 | sbale->length = 0; | |
2132 | sbale->flags = SBAL_FLAGS_LAST_ENTRY; | |
2133 | sbale->addr = 0; | |
2134 | } | |
2135 | ||
2136 | ZFCP_LOG_TRACE("calling do_QDIO on adapter %s (flags=0x%x, " | |
2137 | "queue_no=%i, index_in_queue=%i, count=%i)\n", | |
2138 | zfcp_get_busid_by_adapter(adapter), | |
2139 | QDIO_FLAG_SYNC_INPUT, 0, 0, QDIO_MAX_BUFFERS_PER_Q); | |
2140 | ||
2141 | retval = do_QDIO(adapter->ccw_device, | |
2142 | QDIO_FLAG_SYNC_INPUT, | |
2143 | 0, 0, QDIO_MAX_BUFFERS_PER_Q, NULL); | |
2144 | ||
2145 | if (retval) { | |
2146 | ZFCP_LOG_NORMAL("bug: setup of QDIO failed (retval=%d)\n", | |
2147 | retval); | |
2148 | goto failed_do_qdio; | |
2149 | } else { | |
2150 | adapter->response_queue.free_index = 0; | |
2151 | atomic_set(&adapter->response_queue.free_count, 0); | |
2152 | ZFCP_LOG_DEBUG("%i buffers successfully enqueued to " | |
2153 | "response queue\n", QDIO_MAX_BUFFERS_PER_Q); | |
2154 | } | |
2155 | /* set index of first avalable SBALS / number of available SBALS */ | |
2156 | adapter->request_queue.free_index = 0; | |
2157 | atomic_set(&adapter->request_queue.free_count, QDIO_MAX_BUFFERS_PER_Q); | |
2158 | adapter->request_queue.distance_from_int = 0; | |
2159 | ||
2160 | /* initialize waitqueue used to wait for free SBALs in requests queue */ | |
2161 | init_waitqueue_head(&adapter->request_wq); | |
2162 | ||
2163 | /* ok, we did it - skip all cleanups for different failures */ | |
2164 | atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); | |
2165 | retval = ZFCP_ERP_SUCCEEDED; | |
2166 | goto out; | |
2167 | ||
2168 | failed_do_qdio: | |
2169 | /* NOP */ | |
2170 | ||
2171 | failed_qdio_activate: | |
2172 | debug_text_event(adapter->erp_dbf, 3, "qdio_down1a"); | |
2173 | while (qdio_shutdown(adapter->ccw_device, | |
2174 | QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) | |
2175 | msleep(1000); | |
2176 | debug_text_event(adapter->erp_dbf, 3, "qdio_down1b"); | |
2177 | ||
2178 | failed_qdio_establish: | |
2179 | failed_sanity: | |
2180 | retval = ZFCP_ERP_FAILED; | |
2181 | ||
2182 | out: | |
2183 | return retval; | |
2184 | } | |
2185 | ||
2186 | /* | |
2187 | * function: zfcp_qdio_cleanup | |
2188 | * | |
2189 | * purpose: cleans up QDIO operation for the specified adapter | |
2190 | * | |
2191 | * returns: 0 - successful cleanup | |
2192 | * !0 - failed cleanup | |
2193 | */ | |
2194 | int | |
2195 | zfcp_erp_adapter_strategy_close_qdio(struct zfcp_erp_action *erp_action) | |
2196 | { | |
2197 | int retval = ZFCP_ERP_SUCCEEDED; | |
2198 | int first_used; | |
2199 | int used_count; | |
2200 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2201 | ||
2202 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { | |
2203 | ZFCP_LOG_DEBUG("error: attempt to shut down inactive QDIO " | |
2204 | "queues on adapter %s\n", | |
2205 | zfcp_get_busid_by_adapter(adapter)); | |
2206 | retval = ZFCP_ERP_FAILED; | |
2207 | goto out; | |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * Get queue_lock and clear QDIOUP flag. Thus it's guaranteed that | |
2212 | * do_QDIO won't be called while qdio_shutdown is in progress. | |
2213 | */ | |
2214 | ||
2215 | write_lock_irq(&adapter->request_queue.queue_lock); | |
2216 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status); | |
2217 | write_unlock_irq(&adapter->request_queue.queue_lock); | |
2218 | ||
2219 | debug_text_event(adapter->erp_dbf, 3, "qdio_down2a"); | |
2220 | while (qdio_shutdown(adapter->ccw_device, | |
2221 | QDIO_FLAG_CLEANUP_USING_CLEAR) == -EINPROGRESS) | |
2222 | msleep(1000); | |
2223 | debug_text_event(adapter->erp_dbf, 3, "qdio_down2b"); | |
2224 | ||
2225 | /* | |
2226 | * First we had to stop QDIO operation. | |
2227 | * Now it is safe to take the following actions. | |
2228 | */ | |
2229 | ||
2230 | /* Cleanup only necessary when there are unacknowledged buffers */ | |
2231 | if (atomic_read(&adapter->request_queue.free_count) | |
2232 | < QDIO_MAX_BUFFERS_PER_Q) { | |
2233 | first_used = (adapter->request_queue.free_index + | |
2234 | atomic_read(&adapter->request_queue.free_count)) | |
2235 | % QDIO_MAX_BUFFERS_PER_Q; | |
2236 | used_count = QDIO_MAX_BUFFERS_PER_Q - | |
2237 | atomic_read(&adapter->request_queue.free_count); | |
2238 | zfcp_qdio_zero_sbals(adapter->request_queue.buffer, | |
2239 | first_used, used_count); | |
2240 | } | |
2241 | adapter->response_queue.free_index = 0; | |
2242 | atomic_set(&adapter->response_queue.free_count, 0); | |
2243 | adapter->request_queue.free_index = 0; | |
2244 | atomic_set(&adapter->request_queue.free_count, 0); | |
2245 | adapter->request_queue.distance_from_int = 0; | |
2246 | out: | |
2247 | return retval; | |
2248 | } | |
2249 | ||
2250 | /* | |
2251 | * function: zfcp_fsf_init | |
2252 | * | |
2253 | * purpose: initializes FSF operation for the specified adapter | |
2254 | * | |
2255 | * returns: 0 - succesful initialization of FSF operation | |
2256 | * !0 - failed to initialize FSF operation | |
2257 | */ | |
2258 | static int | |
2259 | zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action) | |
2260 | { | |
2261 | int retval; | |
2262 | ||
2263 | /* do 'exchange configuration data' */ | |
2264 | retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action); | |
2265 | if (retval == ZFCP_ERP_FAILED) | |
2266 | return retval; | |
2267 | ||
2268 | /* start the desired number of Status Reads */ | |
2269 | retval = zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action); | |
2270 | return retval; | |
2271 | } | |
2272 | ||
2273 | /* | |
2274 | * function: | |
2275 | * | |
2276 | * purpose: | |
2277 | * | |
2278 | * returns: | |
2279 | */ | |
2280 | static int | |
2281 | zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) | |
2282 | { | |
2283 | int retval = ZFCP_ERP_SUCCEEDED; | |
2284 | int retries; | |
22753fa5 | 2285 | int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP; |
1da177e4 LT |
2286 | struct zfcp_adapter *adapter = erp_action->adapter; |
2287 | ||
2288 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); | |
1da177e4 | 2289 | |
22753fa5 | 2290 | for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) { |
1da177e4 LT |
2291 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
2292 | &adapter->status); | |
2293 | ZFCP_LOG_DEBUG("Doing exchange config data\n"); | |
2294 | zfcp_erp_action_to_running(erp_action); | |
2295 | zfcp_erp_timeout_init(erp_action); | |
2296 | if (zfcp_fsf_exchange_config_data(erp_action)) { | |
2297 | retval = ZFCP_ERP_FAILED; | |
2298 | debug_text_event(adapter->erp_dbf, 5, "a_fstx_xf"); | |
2299 | ZFCP_LOG_INFO("error: initiation of exchange of " | |
2300 | "configuration data failed for " | |
2301 | "adapter %s\n", | |
2302 | zfcp_get_busid_by_adapter(adapter)); | |
2303 | break; | |
2304 | } | |
2305 | debug_text_event(adapter->erp_dbf, 6, "a_fstx_xok"); | |
2306 | ZFCP_LOG_DEBUG("Xchange underway\n"); | |
2307 | ||
2308 | /* | |
2309 | * Why this works: | |
2310 | * Both the normal completion handler as well as the timeout | |
2311 | * handler will do an 'up' when the 'exchange config data' | |
2312 | * request completes or times out. Thus, the signal to go on | |
2313 | * won't be lost utilizing this semaphore. | |
2314 | * Furthermore, this 'adapter_reopen' action is | |
2315 | * guaranteed to be the only action being there (highest action | |
2316 | * which prevents other actions from being created). | |
2317 | * Resulting from that, the wake signal recognized here | |
2318 | * _must_ be the one belonging to the 'exchange config | |
2319 | * data' request. | |
2320 | */ | |
2321 | down(&adapter->erp_ready_sem); | |
2322 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { | |
2323 | ZFCP_LOG_INFO("error: exchange of configuration data " | |
2324 | "for adapter %s timed out\n", | |
2325 | zfcp_get_busid_by_adapter(adapter)); | |
2326 | break; | |
2327 | } | |
22753fa5 AH |
2328 | |
2329 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, | |
2330 | &adapter->status)) | |
2331 | break; | |
2332 | ||
2333 | ZFCP_LOG_DEBUG("host connection still initialising... " | |
2334 | "waiting and retrying...\n"); | |
2335 | /* sleep a little bit before retry */ | |
2336 | msleep(jiffies_to_msecs(sleep)); | |
2337 | sleep *= 2; | |
2338 | } | |
1da177e4 LT |
2339 | |
2340 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, | |
2341 | &adapter->status)) { | |
2342 | ZFCP_LOG_INFO("error: exchange of configuration data for " | |
2343 | "adapter %s failed\n", | |
2344 | zfcp_get_busid_by_adapter(adapter)); | |
2345 | retval = ZFCP_ERP_FAILED; | |
2346 | } | |
2347 | ||
2348 | return retval; | |
2349 | } | |
2350 | ||
2351 | /* | |
2352 | * function: | |
2353 | * | |
2354 | * purpose: | |
2355 | * | |
2356 | * returns: | |
2357 | */ | |
2358 | static int | |
2359 | zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action | |
2360 | *erp_action) | |
2361 | { | |
2362 | int retval = ZFCP_ERP_SUCCEEDED; | |
2363 | int temp_ret; | |
2364 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2365 | int i; | |
2366 | ||
2367 | adapter->status_read_failed = 0; | |
2368 | for (i = 0; i < ZFCP_STATUS_READS_RECOM; i++) { | |
2369 | temp_ret = zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL); | |
2370 | if (temp_ret < 0) { | |
2371 | ZFCP_LOG_INFO("error: set-up of unsolicited status " | |
2372 | "notification failed on adapter %s\n", | |
2373 | zfcp_get_busid_by_adapter(adapter)); | |
2374 | retval = ZFCP_ERP_FAILED; | |
2375 | i--; | |
2376 | break; | |
2377 | } | |
2378 | } | |
2379 | ||
2380 | return retval; | |
2381 | } | |
2382 | ||
2383 | /* | |
2384 | * function: zfcp_fsf_cleanup | |
2385 | * | |
2386 | * purpose: cleanup FSF operation for specified adapter | |
2387 | * | |
2388 | * returns: 0 - FSF operation successfully cleaned up | |
2389 | * !0 - failed to cleanup FSF operation for this adapter | |
2390 | */ | |
2391 | static int | |
2392 | zfcp_erp_adapter_strategy_close_fsf(struct zfcp_erp_action *erp_action) | |
2393 | { | |
2394 | int retval = ZFCP_ERP_SUCCEEDED; | |
2395 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2396 | ||
2397 | /* | |
2398 | * wake waiting initiators of requests, | |
2399 | * return SCSI commands (with error status), | |
2400 | * clean up all requests (synchronously) | |
2401 | */ | |
2402 | zfcp_fsf_req_dismiss_all(adapter); | |
2403 | /* reset FSF request sequence number */ | |
2404 | adapter->fsf_req_seq_no = 0; | |
2405 | /* all ports and units are closed */ | |
2406 | zfcp_erp_modify_adapter_status(adapter, | |
2407 | ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); | |
2408 | ||
2409 | return retval; | |
2410 | } | |
2411 | ||
2412 | /* | |
2413 | * function: | |
2414 | * | |
2415 | * purpose: this routine executes the 'Reopen Physical Port' action | |
2416 | * | |
2417 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
2418 | * ZFCP_ERP_SUCCEEDED - action finished successfully | |
2419 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2420 | */ | |
2421 | static int | |
2422 | zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) | |
2423 | { | |
2424 | int retval = ZFCP_ERP_FAILED; | |
2425 | struct zfcp_port *port = erp_action->port; | |
2426 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2427 | ||
2428 | switch (erp_action->step) { | |
2429 | ||
2430 | /* | |
2431 | * FIXME: | |
2432 | * the ULP spec. begs for waiting for oustanding commands | |
2433 | */ | |
2434 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
2435 | zfcp_erp_port_strategy_clearstati(port); | |
2436 | /* | |
2437 | * it would be sufficient to test only the normal open flag | |
2438 | * since the phys. open flag cannot be set if the normal | |
2439 | * open flag is unset - however, this is for readabilty ... | |
2440 | */ | |
2441 | if (atomic_test_mask((ZFCP_STATUS_PORT_PHYS_OPEN | | |
2442 | ZFCP_STATUS_COMMON_OPEN), | |
2443 | &port->status)) { | |
2444 | ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " | |
2445 | "close physical\n", port->wwpn); | |
2446 | retval = | |
2447 | zfcp_erp_port_forced_strategy_close(erp_action); | |
2448 | } else | |
2449 | retval = ZFCP_ERP_FAILED; | |
2450 | break; | |
2451 | ||
2452 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
2453 | if (atomic_test_mask(ZFCP_STATUS_PORT_PHYS_OPEN, | |
2454 | &port->status)) { | |
2455 | ZFCP_LOG_DEBUG("close physical failed for port " | |
2456 | "0x%016Lx\n", port->wwpn); | |
2457 | retval = ZFCP_ERP_FAILED; | |
2458 | } else | |
2459 | retval = ZFCP_ERP_SUCCEEDED; | |
2460 | break; | |
2461 | } | |
2462 | ||
2463 | debug_text_event(adapter->erp_dbf, 3, "p_pfst/ret"); | |
2464 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); | |
2465 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); | |
2466 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); | |
2467 | ||
2468 | return retval; | |
2469 | } | |
2470 | ||
2471 | /* | |
2472 | * function: | |
2473 | * | |
2474 | * purpose: this routine executes the 'Reopen Port' action | |
2475 | * | |
2476 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
2477 | * ZFCP_ERP_SUCCEEDED - action finished successfully | |
2478 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2479 | */ | |
2480 | static int | |
2481 | zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) | |
2482 | { | |
2483 | int retval = ZFCP_ERP_FAILED; | |
2484 | struct zfcp_port *port = erp_action->port; | |
2485 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2486 | ||
2487 | switch (erp_action->step) { | |
2488 | ||
2489 | /* | |
2490 | * FIXME: | |
2491 | * the ULP spec. begs for waiting for oustanding commands | |
2492 | */ | |
2493 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
2494 | zfcp_erp_port_strategy_clearstati(port); | |
2495 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { | |
2496 | ZFCP_LOG_DEBUG("port 0x%016Lx is open -> trying " | |
2497 | "close\n", port->wwpn); | |
2498 | retval = zfcp_erp_port_strategy_close(erp_action); | |
2499 | goto out; | |
2500 | } /* else it's already closed, open it */ | |
2501 | break; | |
2502 | ||
2503 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
2504 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { | |
2505 | ZFCP_LOG_DEBUG("close failed for port 0x%016Lx\n", | |
2506 | port->wwpn); | |
2507 | retval = ZFCP_ERP_FAILED; | |
2508 | goto out; | |
2509 | } /* else it's closed now, open it */ | |
2510 | break; | |
2511 | } | |
2512 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
2513 | retval = ZFCP_ERP_EXIT; | |
2514 | else | |
2515 | retval = zfcp_erp_port_strategy_open(erp_action); | |
2516 | ||
2517 | out: | |
2518 | debug_text_event(adapter->erp_dbf, 3, "p_pst/ret"); | |
2519 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof (wwn_t)); | |
2520 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); | |
2521 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); | |
2522 | ||
2523 | return retval; | |
2524 | } | |
2525 | ||
2526 | /* | |
2527 | * function: | |
2528 | * | |
2529 | * purpose: | |
2530 | * | |
2531 | * returns: | |
2532 | */ | |
2533 | static int | |
2534 | zfcp_erp_port_strategy_open(struct zfcp_erp_action *erp_action) | |
2535 | { | |
2536 | int retval; | |
2537 | ||
2538 | if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, | |
2539 | &erp_action->port->status)) | |
2540 | retval = zfcp_erp_port_strategy_open_nameserver(erp_action); | |
2541 | else | |
2542 | retval = zfcp_erp_port_strategy_open_common(erp_action); | |
2543 | ||
2544 | return retval; | |
2545 | } | |
2546 | ||
2547 | /* | |
2548 | * function: | |
2549 | * | |
2550 | * purpose: | |
2551 | * | |
2552 | * returns: | |
2553 | * | |
2554 | * FIXME(design): currently only prepared for fabric (nameserver!) | |
2555 | */ | |
2556 | static int | |
2557 | zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action) | |
2558 | { | |
2559 | int retval = 0; | |
2560 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2561 | struct zfcp_port *port = erp_action->port; | |
2562 | ||
2563 | switch (erp_action->step) { | |
2564 | ||
2565 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
2566 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
2567 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
6f71d9bc | 2568 | if (adapter->fc_topology == FSF_TOPO_P2P) { |
2569 | if (port->wwpn != adapter->peer_wwpn) { | |
2570 | ZFCP_LOG_NORMAL("Failed to open port 0x%016Lx " | |
2571 | "on adapter %s.\nPeer WWPN " | |
2572 | "0x%016Lx does not match\n", | |
2573 | port->wwpn, | |
2574 | zfcp_get_busid_by_adapter(adapter), | |
2575 | adapter->peer_wwpn); | |
2576 | zfcp_erp_port_failed(port); | |
2577 | retval = ZFCP_ERP_FAILED; | |
2578 | break; | |
2579 | } | |
2580 | port->d_id = adapter->peer_d_id; | |
2581 | atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); | |
2582 | retval = zfcp_erp_port_strategy_open_port(erp_action); | |
2583 | break; | |
2584 | } | |
1da177e4 LT |
2585 | if (!(adapter->nameserver_port)) { |
2586 | retval = zfcp_nameserver_enqueue(adapter); | |
2587 | if (retval != 0) { | |
2588 | ZFCP_LOG_NORMAL("error: nameserver port " | |
2589 | "unavailable for adapter %s\n", | |
2590 | zfcp_get_busid_by_adapter(adapter)); | |
2591 | retval = ZFCP_ERP_FAILED; | |
2592 | break; | |
2593 | } | |
2594 | } | |
2595 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, | |
2596 | &adapter->nameserver_port->status)) { | |
2597 | ZFCP_LOG_DEBUG("nameserver port is not open -> open " | |
2598 | "nameserver port\n"); | |
2599 | /* nameserver port may live again */ | |
2600 | atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, | |
2601 | &adapter->nameserver_port->status); | |
2602 | if (zfcp_erp_port_reopen(adapter->nameserver_port, 0) | |
2603 | >= 0) { | |
2604 | erp_action->step = | |
2605 | ZFCP_ERP_STEP_NAMESERVER_OPEN; | |
2606 | retval = ZFCP_ERP_CONTINUES; | |
2607 | } else | |
2608 | retval = ZFCP_ERP_FAILED; | |
2609 | break; | |
2610 | } | |
2611 | /* else nameserver port is already open, fall through */ | |
2612 | case ZFCP_ERP_STEP_NAMESERVER_OPEN: | |
2613 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, | |
2614 | &adapter->nameserver_port->status)) { | |
2615 | ZFCP_LOG_DEBUG("open failed for nameserver port\n"); | |
2616 | retval = ZFCP_ERP_FAILED; | |
2617 | } else { | |
2618 | ZFCP_LOG_DEBUG("nameserver port is open -> " | |
2619 | "nameserver look-up for port 0x%016Lx\n", | |
2620 | port->wwpn); | |
2621 | retval = zfcp_erp_port_strategy_open_common_lookup | |
2622 | (erp_action); | |
2623 | } | |
2624 | break; | |
2625 | ||
2626 | case ZFCP_ERP_STEP_NAMESERVER_LOOKUP: | |
2627 | if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) { | |
2628 | if (atomic_test_mask | |
2629 | (ZFCP_STATUS_PORT_INVALID_WWPN, &port->status)) { | |
2630 | ZFCP_LOG_DEBUG("nameserver look-up failed " | |
2631 | "for port 0x%016Lx " | |
2632 | "(misconfigured WWPN?)\n", | |
2633 | port->wwpn); | |
2634 | zfcp_erp_port_failed(port); | |
2635 | retval = ZFCP_ERP_EXIT; | |
2636 | } else { | |
2637 | ZFCP_LOG_DEBUG("nameserver look-up failed for " | |
2638 | "port 0x%016Lx\n", port->wwpn); | |
2639 | retval = ZFCP_ERP_FAILED; | |
2640 | } | |
2641 | } else { | |
2642 | ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%08x -> " | |
2643 | "trying open\n", port->wwpn, port->d_id); | |
2644 | retval = zfcp_erp_port_strategy_open_port(erp_action); | |
2645 | } | |
2646 | break; | |
2647 | ||
2648 | case ZFCP_ERP_STEP_PORT_OPENING: | |
2649 | /* D_ID might have changed during open */ | |
2650 | if (atomic_test_mask((ZFCP_STATUS_COMMON_OPEN | | |
2651 | ZFCP_STATUS_PORT_DID_DID), | |
2652 | &port->status)) { | |
2653 | ZFCP_LOG_DEBUG("port 0x%016Lx is open\n", port->wwpn); | |
2654 | retval = ZFCP_ERP_SUCCEEDED; | |
2655 | } else { | |
2656 | ZFCP_LOG_DEBUG("open failed for port 0x%016Lx\n", | |
2657 | port->wwpn); | |
2658 | retval = ZFCP_ERP_FAILED; | |
2659 | } | |
2660 | break; | |
2661 | ||
2662 | default: | |
2663 | ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", | |
2664 | erp_action->step); | |
2665 | retval = ZFCP_ERP_FAILED; | |
2666 | } | |
2667 | ||
2668 | return retval; | |
2669 | } | |
2670 | ||
2671 | /* | |
2672 | * function: | |
2673 | * | |
2674 | * purpose: | |
2675 | * | |
2676 | * returns: | |
2677 | */ | |
2678 | static int | |
2679 | zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *erp_action) | |
2680 | { | |
2681 | int retval; | |
2682 | struct zfcp_port *port = erp_action->port; | |
2683 | ||
2684 | switch (erp_action->step) { | |
2685 | ||
2686 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
2687 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
2688 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
2689 | ZFCP_LOG_DEBUG("port 0x%016Lx has d_id=0x%08x -> trying open\n", | |
2690 | port->wwpn, port->d_id); | |
2691 | retval = zfcp_erp_port_strategy_open_port(erp_action); | |
2692 | break; | |
2693 | ||
2694 | case ZFCP_ERP_STEP_PORT_OPENING: | |
2695 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) { | |
2696 | ZFCP_LOG_DEBUG("WKA port is open\n"); | |
2697 | retval = ZFCP_ERP_SUCCEEDED; | |
2698 | } else { | |
2699 | ZFCP_LOG_DEBUG("open failed for WKA port\n"); | |
2700 | retval = ZFCP_ERP_FAILED; | |
2701 | } | |
2702 | /* this is needed anyway (dont care for retval of wakeup) */ | |
2703 | ZFCP_LOG_DEBUG("continue other open port operations\n"); | |
2704 | zfcp_erp_port_strategy_open_nameserver_wakeup(erp_action); | |
2705 | break; | |
2706 | ||
2707 | default: | |
2708 | ZFCP_LOG_NORMAL("bug: unknown erp step 0x%08x\n", | |
2709 | erp_action->step); | |
2710 | retval = ZFCP_ERP_FAILED; | |
2711 | } | |
2712 | ||
2713 | return retval; | |
2714 | } | |
2715 | ||
2716 | /* | |
2717 | * function: | |
2718 | * | |
2719 | * purpose: makes the erp thread continue with reopen (physical) port | |
2720 | * actions which have been paused until the name server port | |
2721 | * is opened (or failed) | |
2722 | * | |
2723 | * returns: 0 (a kind of void retval, its not used) | |
2724 | */ | |
2725 | static int | |
2726 | zfcp_erp_port_strategy_open_nameserver_wakeup(struct zfcp_erp_action | |
2727 | *ns_erp_action) | |
2728 | { | |
2729 | int retval = 0; | |
2730 | unsigned long flags; | |
2731 | struct zfcp_adapter *adapter = ns_erp_action->adapter; | |
2732 | struct zfcp_erp_action *erp_action, *tmp; | |
2733 | ||
2734 | read_lock_irqsave(&adapter->erp_lock, flags); | |
2735 | list_for_each_entry_safe(erp_action, tmp, &adapter->erp_running_head, | |
2736 | list) { | |
2737 | debug_text_event(adapter->erp_dbf, 4, "p_pstnsw_n"); | |
2738 | debug_event(adapter->erp_dbf, 4, &erp_action->port->wwpn, | |
2739 | sizeof (wwn_t)); | |
2740 | if (erp_action->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) { | |
2741 | debug_text_event(adapter->erp_dbf, 3, "p_pstnsw_w"); | |
2742 | debug_event(adapter->erp_dbf, 3, | |
2743 | &erp_action->port->wwpn, sizeof (wwn_t)); | |
2744 | if (atomic_test_mask( | |
2745 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
2746 | &adapter->nameserver_port->status)) | |
2747 | zfcp_erp_port_failed(erp_action->port); | |
2748 | zfcp_erp_action_ready(erp_action); | |
2749 | } | |
2750 | } | |
2751 | read_unlock_irqrestore(&adapter->erp_lock, flags); | |
2752 | ||
2753 | return retval; | |
2754 | } | |
2755 | ||
2756 | /* | |
2757 | * function: | |
2758 | * | |
2759 | * purpose: | |
2760 | * | |
2761 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
2762 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2763 | */ | |
2764 | static int | |
2765 | zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *erp_action) | |
2766 | { | |
2767 | int retval; | |
2768 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2769 | struct zfcp_port *port = erp_action->port; | |
2770 | ||
2771 | zfcp_erp_timeout_init(erp_action); | |
2772 | retval = zfcp_fsf_close_physical_port(erp_action); | |
2773 | if (retval == -ENOMEM) { | |
2774 | debug_text_event(adapter->erp_dbf, 5, "o_pfstc_nomem"); | |
2775 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2776 | retval = ZFCP_ERP_NOMEM; | |
2777 | goto out; | |
2778 | } | |
2779 | erp_action->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; | |
2780 | if (retval != 0) { | |
2781 | debug_text_event(adapter->erp_dbf, 5, "o_pfstc_cpf"); | |
2782 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2783 | /* could not send 'open', fail */ | |
2784 | retval = ZFCP_ERP_FAILED; | |
2785 | goto out; | |
2786 | } | |
2787 | debug_text_event(adapter->erp_dbf, 6, "o_pfstc_cpok"); | |
2788 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); | |
2789 | retval = ZFCP_ERP_CONTINUES; | |
2790 | out: | |
2791 | return retval; | |
2792 | } | |
2793 | ||
2794 | /* | |
2795 | * function: | |
2796 | * | |
2797 | * purpose: | |
2798 | * | |
2799 | * returns: | |
2800 | */ | |
2801 | static int | |
2802 | zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) | |
2803 | { | |
2804 | int retval = 0; | |
2805 | struct zfcp_adapter *adapter = port->adapter; | |
2806 | ||
2807 | debug_text_event(adapter->erp_dbf, 5, "p_pstclst"); | |
2808 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2809 | ||
2810 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | | |
2811 | ZFCP_STATUS_COMMON_CLOSING | | |
2812 | ZFCP_STATUS_COMMON_ACCESS_DENIED | | |
2813 | ZFCP_STATUS_PORT_DID_DID | | |
2814 | ZFCP_STATUS_PORT_PHYS_CLOSING | | |
2815 | ZFCP_STATUS_PORT_INVALID_WWPN, | |
2816 | &port->status); | |
2817 | return retval; | |
2818 | } | |
2819 | ||
2820 | /* | |
2821 | * function: | |
2822 | * | |
2823 | * purpose: | |
2824 | * | |
2825 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
2826 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2827 | */ | |
2828 | static int | |
2829 | zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) | |
2830 | { | |
2831 | int retval; | |
2832 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2833 | struct zfcp_port *port = erp_action->port; | |
2834 | ||
2835 | zfcp_erp_timeout_init(erp_action); | |
2836 | retval = zfcp_fsf_close_port(erp_action); | |
2837 | if (retval == -ENOMEM) { | |
2838 | debug_text_event(adapter->erp_dbf, 5, "p_pstc_nomem"); | |
2839 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2840 | retval = ZFCP_ERP_NOMEM; | |
2841 | goto out; | |
2842 | } | |
2843 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; | |
2844 | if (retval != 0) { | |
2845 | debug_text_event(adapter->erp_dbf, 5, "p_pstc_cpf"); | |
2846 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2847 | /* could not send 'close', fail */ | |
2848 | retval = ZFCP_ERP_FAILED; | |
2849 | goto out; | |
2850 | } | |
2851 | debug_text_event(adapter->erp_dbf, 6, "p_pstc_cpok"); | |
2852 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); | |
2853 | retval = ZFCP_ERP_CONTINUES; | |
2854 | out: | |
2855 | return retval; | |
2856 | } | |
2857 | ||
2858 | /* | |
2859 | * function: | |
2860 | * | |
2861 | * purpose: | |
2862 | * | |
2863 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
2864 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2865 | */ | |
2866 | static int | |
2867 | zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) | |
2868 | { | |
2869 | int retval; | |
2870 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2871 | struct zfcp_port *port = erp_action->port; | |
2872 | ||
2873 | zfcp_erp_timeout_init(erp_action); | |
2874 | retval = zfcp_fsf_open_port(erp_action); | |
2875 | if (retval == -ENOMEM) { | |
2876 | debug_text_event(adapter->erp_dbf, 5, "p_psto_nomem"); | |
2877 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2878 | retval = ZFCP_ERP_NOMEM; | |
2879 | goto out; | |
2880 | } | |
2881 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; | |
2882 | if (retval != 0) { | |
2883 | debug_text_event(adapter->erp_dbf, 5, "p_psto_opf"); | |
2884 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2885 | /* could not send 'open', fail */ | |
2886 | retval = ZFCP_ERP_FAILED; | |
2887 | goto out; | |
2888 | } | |
2889 | debug_text_event(adapter->erp_dbf, 6, "p_psto_opok"); | |
2890 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); | |
2891 | retval = ZFCP_ERP_CONTINUES; | |
2892 | out: | |
2893 | return retval; | |
2894 | } | |
2895 | ||
2896 | /* | |
2897 | * function: | |
2898 | * | |
2899 | * purpose: | |
2900 | * | |
2901 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
2902 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2903 | */ | |
2904 | static int | |
2905 | zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *erp_action) | |
2906 | { | |
2907 | int retval; | |
2908 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2909 | struct zfcp_port *port = erp_action->port; | |
2910 | ||
2911 | zfcp_erp_timeout_init(erp_action); | |
2912 | retval = zfcp_ns_gid_pn_request(erp_action); | |
2913 | if (retval == -ENOMEM) { | |
2914 | debug_text_event(adapter->erp_dbf, 5, "p_pstn_nomem"); | |
2915 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2916 | retval = ZFCP_ERP_NOMEM; | |
2917 | goto out; | |
2918 | } | |
2919 | erp_action->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; | |
2920 | if (retval != 0) { | |
2921 | debug_text_event(adapter->erp_dbf, 5, "p_pstn_ref"); | |
2922 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
2923 | /* could not send nameserver request, fail */ | |
2924 | retval = ZFCP_ERP_FAILED; | |
2925 | goto out; | |
2926 | } | |
2927 | debug_text_event(adapter->erp_dbf, 6, "p_pstn_reok"); | |
2928 | debug_event(adapter->erp_dbf, 6, &port->wwpn, sizeof (wwn_t)); | |
2929 | retval = ZFCP_ERP_CONTINUES; | |
2930 | out: | |
2931 | return retval; | |
2932 | } | |
2933 | ||
2934 | /* | |
2935 | * function: | |
2936 | * | |
2937 | * purpose: this routine executes the 'Reopen Unit' action | |
2938 | * currently no retries | |
2939 | * | |
2940 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
2941 | * ZFCP_ERP_SUCCEEDED - action finished successfully | |
2942 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
2943 | */ | |
2944 | static int | |
2945 | zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) | |
2946 | { | |
2947 | int retval = ZFCP_ERP_FAILED; | |
2948 | struct zfcp_unit *unit = erp_action->unit; | |
2949 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2950 | ||
2951 | switch (erp_action->step) { | |
2952 | ||
2953 | /* | |
2954 | * FIXME: | |
2955 | * the ULP spec. begs for waiting for oustanding commands | |
2956 | */ | |
2957 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
2958 | zfcp_erp_unit_strategy_clearstati(unit); | |
2959 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { | |
2960 | ZFCP_LOG_DEBUG("unit 0x%016Lx is open -> " | |
2961 | "trying close\n", unit->fcp_lun); | |
2962 | retval = zfcp_erp_unit_strategy_close(erp_action); | |
2963 | break; | |
2964 | } | |
2965 | /* else it's already closed, fall through */ | |
2966 | case ZFCP_ERP_STEP_UNIT_CLOSING: | |
2967 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { | |
2968 | ZFCP_LOG_DEBUG("close failed for unit 0x%016Lx\n", | |
2969 | unit->fcp_lun); | |
2970 | retval = ZFCP_ERP_FAILED; | |
2971 | } else { | |
2972 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
2973 | retval = ZFCP_ERP_EXIT; | |
2974 | else { | |
2975 | ZFCP_LOG_DEBUG("unit 0x%016Lx is not open -> " | |
2976 | "trying open\n", unit->fcp_lun); | |
2977 | retval = | |
2978 | zfcp_erp_unit_strategy_open(erp_action); | |
2979 | } | |
2980 | } | |
2981 | break; | |
2982 | ||
2983 | case ZFCP_ERP_STEP_UNIT_OPENING: | |
2984 | if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) { | |
2985 | ZFCP_LOG_DEBUG("unit 0x%016Lx is open\n", | |
2986 | unit->fcp_lun); | |
2987 | retval = ZFCP_ERP_SUCCEEDED; | |
2988 | } else { | |
2989 | ZFCP_LOG_DEBUG("open failed for unit 0x%016Lx\n", | |
2990 | unit->fcp_lun); | |
2991 | retval = ZFCP_ERP_FAILED; | |
2992 | } | |
2993 | break; | |
2994 | } | |
2995 | ||
2996 | debug_text_event(adapter->erp_dbf, 3, "u_ust/ret"); | |
2997 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
2998 | debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int)); | |
2999 | debug_event(adapter->erp_dbf, 3, &retval, sizeof (int)); | |
3000 | return retval; | |
3001 | } | |
3002 | ||
3003 | /* | |
3004 | * function: | |
3005 | * | |
3006 | * purpose: | |
3007 | * | |
3008 | * returns: | |
3009 | */ | |
3010 | static int | |
3011 | zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) | |
3012 | { | |
3013 | int retval = 0; | |
3014 | struct zfcp_adapter *adapter = unit->port->adapter; | |
3015 | ||
3016 | debug_text_event(adapter->erp_dbf, 5, "u_ustclst"); | |
3017 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
3018 | ||
3019 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING | | |
3020 | ZFCP_STATUS_COMMON_CLOSING | | |
3021 | ZFCP_STATUS_COMMON_ACCESS_DENIED | | |
3022 | ZFCP_STATUS_UNIT_SHARED | | |
3023 | ZFCP_STATUS_UNIT_READONLY, | |
3024 | &unit->status); | |
3025 | ||
3026 | return retval; | |
3027 | } | |
3028 | ||
3029 | /* | |
3030 | * function: | |
3031 | * | |
3032 | * purpose: | |
3033 | * | |
3034 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
3035 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
3036 | */ | |
3037 | static int | |
3038 | zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) | |
3039 | { | |
3040 | int retval; | |
3041 | struct zfcp_adapter *adapter = erp_action->adapter; | |
3042 | struct zfcp_unit *unit = erp_action->unit; | |
3043 | ||
3044 | zfcp_erp_timeout_init(erp_action); | |
3045 | retval = zfcp_fsf_close_unit(erp_action); | |
3046 | if (retval == -ENOMEM) { | |
3047 | debug_text_event(adapter->erp_dbf, 5, "u_ustc_nomem"); | |
3048 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, | |
3049 | sizeof (fcp_lun_t)); | |
3050 | retval = ZFCP_ERP_NOMEM; | |
3051 | goto out; | |
3052 | } | |
3053 | erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; | |
3054 | if (retval != 0) { | |
3055 | debug_text_event(adapter->erp_dbf, 5, "u_ustc_cuf"); | |
3056 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, | |
3057 | sizeof (fcp_lun_t)); | |
3058 | /* could not send 'close', fail */ | |
3059 | retval = ZFCP_ERP_FAILED; | |
3060 | goto out; | |
3061 | } | |
3062 | debug_text_event(adapter->erp_dbf, 6, "u_ustc_cuok"); | |
3063 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
3064 | retval = ZFCP_ERP_CONTINUES; | |
3065 | ||
3066 | out: | |
3067 | return retval; | |
3068 | } | |
3069 | ||
3070 | /* | |
3071 | * function: | |
3072 | * | |
3073 | * purpose: | |
3074 | * | |
3075 | * returns: ZFCP_ERP_CONTINUES - action continues (asynchronously) | |
3076 | * ZFCP_ERP_FAILED - action finished unsuccessfully | |
3077 | */ | |
3078 | static int | |
3079 | zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) | |
3080 | { | |
3081 | int retval; | |
3082 | struct zfcp_adapter *adapter = erp_action->adapter; | |
3083 | struct zfcp_unit *unit = erp_action->unit; | |
3084 | ||
3085 | zfcp_erp_timeout_init(erp_action); | |
3086 | retval = zfcp_fsf_open_unit(erp_action); | |
3087 | if (retval == -ENOMEM) { | |
3088 | debug_text_event(adapter->erp_dbf, 5, "u_usto_nomem"); | |
3089 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, | |
3090 | sizeof (fcp_lun_t)); | |
3091 | retval = ZFCP_ERP_NOMEM; | |
3092 | goto out; | |
3093 | } | |
3094 | erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; | |
3095 | if (retval != 0) { | |
3096 | debug_text_event(adapter->erp_dbf, 5, "u_usto_ouf"); | |
3097 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, | |
3098 | sizeof (fcp_lun_t)); | |
3099 | /* could not send 'open', fail */ | |
3100 | retval = ZFCP_ERP_FAILED; | |
3101 | goto out; | |
3102 | } | |
3103 | debug_text_event(adapter->erp_dbf, 6, "u_usto_ouok"); | |
3104 | debug_event(adapter->erp_dbf, 6, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
3105 | retval = ZFCP_ERP_CONTINUES; | |
3106 | out: | |
3107 | return retval; | |
3108 | } | |
3109 | ||
3110 | /* | |
3111 | * function: | |
3112 | * | |
3113 | * purpose: | |
3114 | * | |
3115 | * returns: | |
3116 | */ | |
3117 | static inline void | |
3118 | zfcp_erp_timeout_init(struct zfcp_erp_action *erp_action) | |
3119 | { | |
3120 | init_timer(&erp_action->timer); | |
3121 | erp_action->timer.function = zfcp_erp_timeout_handler; | |
3122 | erp_action->timer.data = (unsigned long) erp_action; | |
3123 | /* jiffies will be added in zfcp_fsf_req_send */ | |
3124 | erp_action->timer.expires = ZFCP_ERP_FSFREQ_TIMEOUT; | |
3125 | } | |
3126 | ||
3127 | /* | |
3128 | * function: | |
3129 | * | |
3130 | * purpose: enqueue the specified error recovery action, if needed | |
3131 | * | |
3132 | * returns: | |
3133 | */ | |
3134 | static int | |
3135 | zfcp_erp_action_enqueue(int action, | |
3136 | struct zfcp_adapter *adapter, | |
3137 | struct zfcp_port *port, struct zfcp_unit *unit) | |
3138 | { | |
3139 | int retval = 1; | |
3140 | struct zfcp_erp_action *erp_action = NULL; | |
3141 | int stronger_action = 0; | |
3142 | u32 status = 0; | |
3143 | ||
3144 | /* | |
3145 | * We need some rules here which check whether we really need | |
3146 | * this action or whether we should just drop it. | |
3147 | * E.g. if there is a unfinished 'Reopen Port' request then we drop a | |
3148 | * 'Reopen Unit' request for an associated unit since we can't | |
3149 | * satisfy this request now. A 'Reopen Port' action will trigger | |
3150 | * 'Reopen Unit' actions when it completes. | |
3151 | * Thus, there are only actions in the queue which can immediately be | |
3152 | * executed. This makes the processing of the action queue more | |
3153 | * efficient. | |
3154 | */ | |
3155 | ||
3156 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, | |
3157 | &adapter->status)) | |
3158 | return -EIO; | |
3159 | ||
3160 | debug_event(adapter->erp_dbf, 4, &action, sizeof (int)); | |
3161 | /* check whether we really need this */ | |
3162 | switch (action) { | |
3163 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
3164 | if (atomic_test_mask | |
3165 | (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) { | |
3166 | debug_text_event(adapter->erp_dbf, 4, "u_actenq_drp"); | |
3167 | debug_event(adapter->erp_dbf, 4, &port->wwpn, | |
3168 | sizeof (wwn_t)); | |
3169 | debug_event(adapter->erp_dbf, 4, &unit->fcp_lun, | |
3170 | sizeof (fcp_lun_t)); | |
3171 | goto out; | |
3172 | } | |
3173 | if (!atomic_test_mask | |
3174 | (ZFCP_STATUS_COMMON_RUNNING, &port->status) || | |
3175 | atomic_test_mask | |
3176 | (ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) { | |
3177 | goto out; | |
3178 | } | |
3179 | if (!atomic_test_mask | |
3180 | (ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) { | |
3181 | stronger_action = ZFCP_ERP_ACTION_REOPEN_PORT; | |
3182 | unit = NULL; | |
3183 | } | |
3184 | /* fall through !!! */ | |
3185 | ||
3186 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
3187 | if (atomic_test_mask | |
3188 | (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) { | |
3189 | debug_text_event(adapter->erp_dbf, 4, "p_actenq_drp"); | |
3190 | debug_event(adapter->erp_dbf, 4, &port->wwpn, | |
3191 | sizeof (wwn_t)); | |
3192 | goto out; | |
3193 | } | |
3194 | /* fall through !!! */ | |
3195 | ||
3196 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
3197 | if (atomic_test_mask | |
3198 | (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status) | |
3199 | && port->erp_action.action == | |
3200 | ZFCP_ERP_ACTION_REOPEN_PORT_FORCED) { | |
3201 | debug_text_event(adapter->erp_dbf, 4, "pf_actenq_drp"); | |
3202 | debug_event(adapter->erp_dbf, 4, &port->wwpn, | |
3203 | sizeof (wwn_t)); | |
3204 | goto out; | |
3205 | } | |
3206 | if (!atomic_test_mask | |
3207 | (ZFCP_STATUS_COMMON_RUNNING, &adapter->status) || | |
3208 | atomic_test_mask | |
3209 | (ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) { | |
3210 | goto out; | |
3211 | } | |
3212 | if (!atomic_test_mask | |
3213 | (ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) { | |
3214 | stronger_action = ZFCP_ERP_ACTION_REOPEN_ADAPTER; | |
3215 | port = NULL; | |
3216 | } | |
3217 | /* fall through !!! */ | |
3218 | ||
3219 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
3220 | if (atomic_test_mask | |
3221 | (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) { | |
3222 | debug_text_event(adapter->erp_dbf, 4, "a_actenq_drp"); | |
3223 | goto out; | |
3224 | } | |
3225 | break; | |
3226 | ||
3227 | default: | |
3228 | debug_text_exception(adapter->erp_dbf, 1, "a_actenq_bug"); | |
3229 | debug_event(adapter->erp_dbf, 1, &action, sizeof (int)); | |
3230 | ZFCP_LOG_NORMAL("bug: unknown erp action requested " | |
3231 | "on adapter %s (action=%d)\n", | |
3232 | zfcp_get_busid_by_adapter(adapter), action); | |
3233 | goto out; | |
3234 | } | |
3235 | ||
3236 | /* check whether we need something stronger first */ | |
3237 | if (stronger_action) { | |
3238 | debug_text_event(adapter->erp_dbf, 4, "a_actenq_str"); | |
3239 | debug_event(adapter->erp_dbf, 4, &stronger_action, | |
3240 | sizeof (int)); | |
3241 | ZFCP_LOG_DEBUG("stronger erp action %d needed before " | |
3242 | "erp action %d on adapter %s\n", | |
3243 | stronger_action, action, | |
3244 | zfcp_get_busid_by_adapter(adapter)); | |
3245 | action = stronger_action; | |
3246 | } | |
3247 | ||
3248 | /* mark adapter to have some error recovery pending */ | |
3249 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); | |
3250 | ||
3251 | /* setup error recovery action */ | |
3252 | switch (action) { | |
3253 | ||
3254 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
3255 | zfcp_unit_get(unit); | |
3256 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); | |
3257 | erp_action = &unit->erp_action; | |
3258 | if (!atomic_test_mask | |
3259 | (ZFCP_STATUS_COMMON_RUNNING, &unit->status)) | |
3260 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
3261 | break; | |
3262 | ||
3263 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
3264 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
3265 | zfcp_port_get(port); | |
3266 | zfcp_erp_action_dismiss_port(port); | |
3267 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); | |
3268 | erp_action = &port->erp_action; | |
3269 | if (!atomic_test_mask | |
3270 | (ZFCP_STATUS_COMMON_RUNNING, &port->status)) | |
3271 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
3272 | break; | |
3273 | ||
3274 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
3275 | zfcp_adapter_get(adapter); | |
3276 | zfcp_erp_action_dismiss_adapter(adapter); | |
3277 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); | |
3278 | erp_action = &adapter->erp_action; | |
3279 | if (!atomic_test_mask | |
3280 | (ZFCP_STATUS_COMMON_RUNNING, &adapter->status)) | |
3281 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
3282 | break; | |
3283 | } | |
3284 | ||
3285 | debug_text_event(adapter->erp_dbf, 4, "a_actenq"); | |
3286 | ||
3287 | memset(erp_action, 0, sizeof (struct zfcp_erp_action)); | |
3288 | erp_action->adapter = adapter; | |
3289 | erp_action->port = port; | |
3290 | erp_action->unit = unit; | |
3291 | erp_action->action = action; | |
3292 | erp_action->status = status; | |
3293 | ||
3294 | ++adapter->erp_total_count; | |
3295 | ||
3296 | /* finally put it into 'ready' queue and kick erp thread */ | |
3297 | list_add(&erp_action->list, &adapter->erp_ready_head); | |
3298 | up(&adapter->erp_ready_sem); | |
3299 | retval = 0; | |
3300 | out: | |
3301 | return retval; | |
3302 | } | |
3303 | ||
3304 | /* | |
3305 | * function: | |
3306 | * | |
3307 | * purpose: | |
3308 | * | |
3309 | * returns: | |
3310 | */ | |
3311 | static int | |
3312 | zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) | |
3313 | { | |
3314 | int retval = 0; | |
3315 | struct zfcp_adapter *adapter = erp_action->adapter; | |
3316 | ||
3317 | --adapter->erp_total_count; | |
3318 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
3319 | --adapter->erp_low_mem_count; | |
3320 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
3321 | } | |
3322 | ||
3323 | debug_text_event(adapter->erp_dbf, 4, "a_actdeq"); | |
3324 | debug_event(adapter->erp_dbf, 4, &erp_action->action, sizeof (int)); | |
3325 | list_del(&erp_action->list); | |
3326 | switch (erp_action->action) { | |
3327 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
3328 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
3329 | &erp_action->unit->status); | |
3330 | break; | |
3331 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
3332 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
3333 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
3334 | &erp_action->port->status); | |
3335 | break; | |
3336 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
3337 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
3338 | &erp_action->adapter->status); | |
3339 | break; | |
3340 | default: | |
3341 | /* bug */ | |
3342 | break; | |
3343 | } | |
3344 | return retval; | |
3345 | } | |
3346 | ||
3347 | /** | |
3348 | * zfcp_erp_action_cleanup | |
3349 | * | |
3350 | * Register unit with scsi stack if appropiate and fix reference counts. | |
3351 | * Note: Temporary units are not registered with scsi stack. | |
3352 | */ | |
3353 | static void | |
3354 | zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter, | |
3355 | struct zfcp_port *port, struct zfcp_unit *unit, | |
3356 | int result) | |
3357 | { | |
3358 | switch (action) { | |
3359 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
3360 | if ((result == ZFCP_ERP_SUCCEEDED) | |
3361 | && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY, | |
3362 | &unit->status)) | |
3859f6a2 AH |
3363 | && !unit->device |
3364 | && port->rport) | |
3365 | scsi_add_device(port->adapter->scsi_host, 0, | |
3366 | port->rport->scsi_target_id, | |
3367 | unit->scsi_lun); | |
1da177e4 LT |
3368 | zfcp_unit_put(unit); |
3369 | break; | |
3370 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
3371 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
3859f6a2 AH |
3372 | if ((result == ZFCP_ERP_SUCCEEDED) |
3373 | && !atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, | |
3374 | &port->status) | |
3375 | && !port->rport) { | |
3376 | struct fc_rport_identifiers ids; | |
3377 | ids.node_name = port->wwnn; | |
3378 | ids.port_name = port->wwpn; | |
3379 | ids.port_id = port->d_id; | |
3380 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
3381 | port->rport = | |
3382 | fc_remote_port_add(adapter->scsi_host, 0, &ids); | |
3383 | if (!port->rport) | |
3384 | ZFCP_LOG_NORMAL("failed registration of rport" | |
3385 | "(adapter %s, wwpn=0x%016Lx)\n", | |
3386 | zfcp_get_busid_by_port(port), | |
3387 | port->wwpn); | |
3388 | } | |
1da177e4 LT |
3389 | zfcp_port_put(port); |
3390 | break; | |
3391 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
3392 | zfcp_adapter_put(adapter); | |
3393 | break; | |
3394 | default: | |
3395 | break; | |
3396 | } | |
3397 | } | |
3398 | ||
3399 | ||
3400 | /* | |
3401 | * function: | |
3402 | * | |
3403 | * purpose: | |
3404 | * | |
3405 | * returns: FIXME | |
3406 | */ | |
3407 | static int | |
3408 | zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) | |
3409 | { | |
3410 | int retval = 0; | |
3411 | struct zfcp_port *port; | |
3412 | ||
3413 | debug_text_event(adapter->erp_dbf, 5, "a_actab"); | |
3414 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) | |
3415 | zfcp_erp_action_dismiss(&adapter->erp_action); | |
3416 | else | |
3417 | list_for_each_entry(port, &adapter->port_list_head, list) | |
3418 | zfcp_erp_action_dismiss_port(port); | |
3419 | ||
3420 | return retval; | |
3421 | } | |
3422 | ||
3423 | /* | |
3424 | * function: | |
3425 | * | |
3426 | * purpose: | |
3427 | * | |
3428 | * returns: FIXME | |
3429 | */ | |
3430 | static int | |
3431 | zfcp_erp_action_dismiss_port(struct zfcp_port *port) | |
3432 | { | |
3433 | int retval = 0; | |
3434 | struct zfcp_unit *unit; | |
3435 | struct zfcp_adapter *adapter = port->adapter; | |
3436 | ||
3437 | debug_text_event(adapter->erp_dbf, 5, "p_actab"); | |
3438 | debug_event(adapter->erp_dbf, 5, &port->wwpn, sizeof (wwn_t)); | |
3439 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) | |
3440 | zfcp_erp_action_dismiss(&port->erp_action); | |
3441 | else | |
3442 | list_for_each_entry(unit, &port->unit_list_head, list) | |
3443 | zfcp_erp_action_dismiss_unit(unit); | |
3444 | ||
3445 | return retval; | |
3446 | } | |
3447 | ||
3448 | /* | |
3449 | * function: | |
3450 | * | |
3451 | * purpose: | |
3452 | * | |
3453 | * returns: FIXME | |
3454 | */ | |
3455 | static int | |
3456 | zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) | |
3457 | { | |
3458 | int retval = 0; | |
3459 | struct zfcp_adapter *adapter = unit->port->adapter; | |
3460 | ||
3461 | debug_text_event(adapter->erp_dbf, 5, "u_actab"); | |
3462 | debug_event(adapter->erp_dbf, 5, &unit->fcp_lun, sizeof (fcp_lun_t)); | |
3463 | if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) | |
3464 | zfcp_erp_action_dismiss(&unit->erp_action); | |
3465 | ||
3466 | return retval; | |
3467 | } | |
3468 | ||
3469 | /* | |
3470 | * function: | |
3471 | * | |
3472 | * purpose: moves erp_action to 'erp running list' | |
3473 | * | |
3474 | * returns: | |
3475 | */ | |
3476 | static inline void | |
3477 | zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) | |
3478 | { | |
3479 | struct zfcp_adapter *adapter = erp_action->adapter; | |
3480 | ||
3481 | debug_text_event(adapter->erp_dbf, 6, "a_toru"); | |
3482 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); | |
3483 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); | |
3484 | } | |
3485 | ||
3486 | /* | |
3487 | * function: | |
3488 | * | |
3489 | * purpose: moves erp_action to 'erp ready list' | |
3490 | * | |
3491 | * returns: | |
3492 | */ | |
3493 | static inline void | |
3494 | zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action) | |
3495 | { | |
3496 | struct zfcp_adapter *adapter = erp_action->adapter; | |
3497 | ||
3498 | debug_text_event(adapter->erp_dbf, 6, "a_tore"); | |
3499 | debug_event(adapter->erp_dbf, 6, &erp_action->action, sizeof (int)); | |
3500 | list_move(&erp_action->list, &erp_action->adapter->erp_ready_head); | |
3501 | } | |
3502 | ||
d736a27b AH |
3503 | /* |
3504 | * function: zfcp_erp_port_boxed | |
3505 | * | |
3506 | * purpose: | |
3507 | */ | |
3508 | void | |
3509 | zfcp_erp_port_boxed(struct zfcp_port *port) | |
3510 | { | |
3511 | struct zfcp_adapter *adapter = port->adapter; | |
3512 | unsigned long flags; | |
3513 | ||
3514 | debug_text_event(adapter->erp_dbf, 3, "p_access_boxed"); | |
3515 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); | |
3516 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
3517 | zfcp_erp_modify_port_status(port, | |
3518 | ZFCP_STATUS_COMMON_ACCESS_BOXED, | |
3519 | ZFCP_SET); | |
3520 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
3521 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED); | |
3522 | } | |
3523 | ||
3524 | /* | |
3525 | * function: zfcp_erp_unit_boxed | |
3526 | * | |
3527 | * purpose: | |
3528 | */ | |
3529 | void | |
3530 | zfcp_erp_unit_boxed(struct zfcp_unit *unit) | |
3531 | { | |
3532 | struct zfcp_adapter *adapter = unit->port->adapter; | |
3533 | ||
3534 | debug_text_event(adapter->erp_dbf, 3, "u_access_boxed"); | |
3535 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); | |
3536 | zfcp_erp_modify_unit_status(unit, | |
3537 | ZFCP_STATUS_COMMON_ACCESS_BOXED, | |
3538 | ZFCP_SET); | |
3539 | zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED); | |
3540 | } | |
3541 | ||
1da177e4 LT |
3542 | /* |
3543 | * function: zfcp_erp_port_access_denied | |
3544 | * | |
3545 | * purpose: | |
3546 | */ | |
3547 | void | |
3548 | zfcp_erp_port_access_denied(struct zfcp_port *port) | |
3549 | { | |
3550 | struct zfcp_adapter *adapter = port->adapter; | |
3551 | unsigned long flags; | |
3552 | ||
d736a27b | 3553 | debug_text_event(adapter->erp_dbf, 3, "p_access_denied"); |
1da177e4 LT |
3554 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); |
3555 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
d736a27b AH |
3556 | zfcp_erp_modify_port_status(port, |
3557 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
3558 | ZFCP_STATUS_COMMON_ACCESS_DENIED, | |
3559 | ZFCP_SET); | |
1da177e4 LT |
3560 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
3561 | } | |
3562 | ||
3563 | /* | |
3564 | * function: zfcp_erp_unit_access_denied | |
3565 | * | |
3566 | * purpose: | |
3567 | */ | |
3568 | void | |
3569 | zfcp_erp_unit_access_denied(struct zfcp_unit *unit) | |
3570 | { | |
3571 | struct zfcp_adapter *adapter = unit->port->adapter; | |
3572 | ||
d736a27b | 3573 | debug_text_event(adapter->erp_dbf, 3, "u_access_denied"); |
1da177e4 | 3574 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); |
d736a27b AH |
3575 | zfcp_erp_modify_unit_status(unit, |
3576 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
3577 | ZFCP_STATUS_COMMON_ACCESS_DENIED, | |
3578 | ZFCP_SET); | |
1da177e4 LT |
3579 | } |
3580 | ||
3581 | /* | |
3582 | * function: zfcp_erp_adapter_access_changed | |
3583 | * | |
3584 | * purpose: | |
3585 | */ | |
3586 | void | |
3587 | zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter) | |
3588 | { | |
3589 | struct zfcp_port *port; | |
3590 | unsigned long flags; | |
3591 | ||
d736a27b | 3592 | debug_text_event(adapter->erp_dbf, 3, "a_access_recover"); |
1da177e4 LT |
3593 | debug_event(adapter->erp_dbf, 3, &adapter->name, 8); |
3594 | ||
1da177e4 | 3595 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
6f71d9bc | 3596 | if (adapter->nameserver_port) |
3597 | zfcp_erp_port_access_changed(adapter->nameserver_port); | |
1da177e4 LT |
3598 | list_for_each_entry(port, &adapter->port_list_head, list) |
3599 | if (port != adapter->nameserver_port) | |
3600 | zfcp_erp_port_access_changed(port); | |
3601 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
3602 | } | |
3603 | ||
3604 | /* | |
3605 | * function: zfcp_erp_port_access_changed | |
3606 | * | |
3607 | * purpose: | |
3608 | */ | |
3609 | void | |
3610 | zfcp_erp_port_access_changed(struct zfcp_port *port) | |
3611 | { | |
3612 | struct zfcp_adapter *adapter = port->adapter; | |
3613 | struct zfcp_unit *unit; | |
3614 | ||
d736a27b | 3615 | debug_text_event(adapter->erp_dbf, 3, "p_access_recover"); |
1da177e4 LT |
3616 | debug_event(adapter->erp_dbf, 3, &port->wwpn, sizeof(wwn_t)); |
3617 | ||
3618 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, | |
d736a27b AH |
3619 | &port->status) && |
3620 | !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, | |
1da177e4 LT |
3621 | &port->status)) { |
3622 | if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status)) | |
3623 | list_for_each_entry(unit, &port->unit_list_head, list) | |
3624 | zfcp_erp_unit_access_changed(unit); | |
3625 | return; | |
3626 | } | |
3627 | ||
3628 | ZFCP_LOG_NORMAL("reopen of port 0x%016Lx on adapter %s " | |
3629 | "(due to ACT update)\n", | |
3630 | port->wwpn, zfcp_get_busid_by_adapter(adapter)); | |
3631 | if (zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED) != 0) | |
3632 | ZFCP_LOG_NORMAL("failed reopen of port" | |
3633 | "(adapter %s, wwpn=0x%016Lx)\n", | |
3634 | zfcp_get_busid_by_adapter(adapter), port->wwpn); | |
3635 | } | |
3636 | ||
3637 | /* | |
3638 | * function: zfcp_erp_unit_access_changed | |
3639 | * | |
3640 | * purpose: | |
3641 | */ | |
3642 | void | |
3643 | zfcp_erp_unit_access_changed(struct zfcp_unit *unit) | |
3644 | { | |
3645 | struct zfcp_adapter *adapter = unit->port->adapter; | |
3646 | ||
d736a27b | 3647 | debug_text_event(adapter->erp_dbf, 3, "u_access_recover"); |
1da177e4 LT |
3648 | debug_event(adapter->erp_dbf, 3, &unit->fcp_lun, sizeof(fcp_lun_t)); |
3649 | ||
d736a27b AH |
3650 | if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, |
3651 | &unit->status) && | |
3652 | !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED, | |
3653 | &unit->status)) | |
1da177e4 LT |
3654 | return; |
3655 | ||
3656 | ZFCP_LOG_NORMAL("reopen of unit 0x%016Lx on port 0x%016Lx " | |
3657 | " on adapter %s (due to ACT update)\n", | |
3658 | unit->fcp_lun, unit->port->wwpn, | |
3659 | zfcp_get_busid_by_adapter(adapter)); | |
3660 | if (zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED) != 0) | |
3661 | ZFCP_LOG_NORMAL("failed reopen of unit (adapter %s, " | |
3662 | "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n", | |
3663 | zfcp_get_busid_by_adapter(adapter), | |
3664 | unit->port->wwpn, unit->fcp_lun); | |
3665 | } | |
3666 | ||
3667 | #undef ZFCP_LOG_AREA |