Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Error Recovery Procedures (ERP). |
41fa2ada | 5 | * |
553448f6 | 6 | * Copyright IBM Corporation 2002, 2008 |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include "zfcp_ext.h" |
10 | ||
287ac01a CS |
11 | #define ZFCP_MAX_ERPS 3 |
12 | ||
13 | enum zfcp_erp_act_flags { | |
14 | ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000, | |
15 | ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000, | |
16 | ZFCP_STATUS_ERP_DISMISSING = 0x00100000, | |
17 | ZFCP_STATUS_ERP_DISMISSED = 0x00200000, | |
18 | ZFCP_STATUS_ERP_LOWMEM = 0x00400000, | |
19 | }; | |
1da177e4 | 20 | |
287ac01a CS |
21 | enum zfcp_erp_steps { |
22 | ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, | |
23 | ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001, | |
24 | ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, | |
25 | ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, | |
287ac01a CS |
26 | ZFCP_ERP_STEP_NAMESERVER_LOOKUP = 0x0400, |
27 | ZFCP_ERP_STEP_PORT_OPENING = 0x0800, | |
28 | ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000, | |
29 | ZFCP_ERP_STEP_UNIT_OPENING = 0x2000, | |
30 | }; | |
31 | ||
32 | enum zfcp_erp_act_type { | |
33 | ZFCP_ERP_ACTION_REOPEN_UNIT = 1, | |
34 | ZFCP_ERP_ACTION_REOPEN_PORT = 2, | |
35 | ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, | |
36 | ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4, | |
37 | }; | |
38 | ||
39 | enum zfcp_erp_act_state { | |
40 | ZFCP_ERP_ACTION_RUNNING = 1, | |
41 | ZFCP_ERP_ACTION_READY = 2, | |
42 | }; | |
43 | ||
44 | enum zfcp_erp_act_result { | |
45 | ZFCP_ERP_SUCCEEDED = 0, | |
46 | ZFCP_ERP_FAILED = 1, | |
47 | ZFCP_ERP_CONTINUES = 2, | |
48 | ZFCP_ERP_EXIT = 3, | |
49 | ZFCP_ERP_DISMISSED = 4, | |
50 | ZFCP_ERP_NOMEM = 5, | |
51 | }; | |
52 | ||
53 | static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask) | |
1da177e4 | 54 | { |
287ac01a CS |
55 | zfcp_erp_modify_adapter_status(adapter, 15, NULL, |
56 | ZFCP_STATUS_COMMON_UNBLOCKED | mask, | |
57 | ZFCP_CLEAR); | |
2abbe866 | 58 | } |
1da177e4 | 59 | |
287ac01a | 60 | static int zfcp_erp_action_exists(struct zfcp_erp_action *act) |
2abbe866 | 61 | { |
287ac01a CS |
62 | struct zfcp_erp_action *curr_act; |
63 | ||
64 | list_for_each_entry(curr_act, &act->adapter->erp_running_head, list) | |
65 | if (act == curr_act) | |
66 | return ZFCP_ERP_ACTION_RUNNING; | |
67 | return 0; | |
1da177e4 LT |
68 | } |
69 | ||
287ac01a | 70 | static void zfcp_erp_action_ready(struct zfcp_erp_action *act) |
2abbe866 | 71 | { |
287ac01a CS |
72 | struct zfcp_adapter *adapter = act->adapter; |
73 | ||
74 | list_move(&act->list, &act->adapter->erp_ready_head); | |
75 | zfcp_rec_dbf_event_action(146, act); | |
76 | up(&adapter->erp_ready_sem); | |
77 | zfcp_rec_dbf_event_thread(2, adapter); | |
2abbe866 AH |
78 | } |
79 | ||
287ac01a | 80 | static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act) |
1da177e4 | 81 | { |
287ac01a CS |
82 | act->status |= ZFCP_STATUS_ERP_DISMISSED; |
83 | if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING) | |
84 | zfcp_erp_action_ready(act); | |
85 | } | |
1da177e4 | 86 | |
287ac01a CS |
87 | static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) |
88 | { | |
89 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE) | |
90 | zfcp_erp_action_dismiss(&unit->erp_action); | |
91 | } | |
1da177e4 | 92 | |
287ac01a CS |
93 | static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) |
94 | { | |
95 | struct zfcp_unit *unit; | |
1da177e4 | 96 | |
287ac01a CS |
97 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
98 | zfcp_erp_action_dismiss(&port->erp_action); | |
99 | else | |
100 | list_for_each_entry(unit, &port->unit_list_head, list) | |
101 | zfcp_erp_action_dismiss_unit(unit); | |
1da177e4 LT |
102 | } |
103 | ||
287ac01a | 104 | static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) |
1da177e4 | 105 | { |
287ac01a | 106 | struct zfcp_port *port; |
1da177e4 | 107 | |
287ac01a CS |
108 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
109 | zfcp_erp_action_dismiss(&adapter->erp_action); | |
110 | else | |
111 | list_for_each_entry(port, &adapter->port_list_head, list) | |
112 | zfcp_erp_action_dismiss_port(port); | |
1da177e4 LT |
113 | } |
114 | ||
287ac01a CS |
115 | static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter, |
116 | struct zfcp_port *port, | |
117 | struct zfcp_unit *unit) | |
1da177e4 | 118 | { |
287ac01a CS |
119 | int need = want; |
120 | int u_status, p_status, a_status; | |
1da177e4 | 121 | |
287ac01a CS |
122 | switch (want) { |
123 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
124 | u_status = atomic_read(&unit->status); | |
125 | if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
126 | return 0; | |
127 | p_status = atomic_read(&port->status); | |
128 | if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) || | |
129 | p_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
130 | return 0; | |
131 | if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED)) | |
132 | need = ZFCP_ERP_ACTION_REOPEN_PORT; | |
133 | /* fall through */ | |
134 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
135 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
136 | p_status = atomic_read(&port->status); | |
137 | if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
138 | return 0; | |
139 | a_status = atomic_read(&adapter->status); | |
140 | if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) || | |
141 | a_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
142 | return 0; | |
143 | if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED)) | |
144 | need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; | |
145 | /* fall through */ | |
146 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
147 | a_status = atomic_read(&adapter->status); | |
148 | if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
149 | return 0; | |
150 | } | |
1da177e4 | 151 | |
287ac01a | 152 | return need; |
1da177e4 LT |
153 | } |
154 | ||
287ac01a CS |
155 | static struct zfcp_erp_action *zfcp_erp_setup_act(int need, |
156 | struct zfcp_adapter *adapter, | |
157 | struct zfcp_port *port, | |
158 | struct zfcp_unit *unit) | |
1da177e4 | 159 | { |
287ac01a CS |
160 | struct zfcp_erp_action *erp_action; |
161 | u32 status = 0; | |
1da177e4 | 162 | |
287ac01a CS |
163 | switch (need) { |
164 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
165 | zfcp_unit_get(unit); | |
166 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); | |
167 | erp_action = &unit->erp_action; | |
168 | if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING)) | |
169 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
170 | break; | |
1da177e4 | 171 | |
287ac01a CS |
172 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
173 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
174 | zfcp_port_get(port); | |
175 | zfcp_erp_action_dismiss_port(port); | |
176 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); | |
177 | erp_action = &port->erp_action; | |
178 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING)) | |
179 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
180 | break; | |
1da177e4 | 181 | |
287ac01a CS |
182 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
183 | zfcp_adapter_get(adapter); | |
184 | zfcp_erp_action_dismiss_adapter(adapter); | |
185 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); | |
186 | erp_action = &adapter->erp_action; | |
187 | if (!(atomic_read(&adapter->status) & | |
188 | ZFCP_STATUS_COMMON_RUNNING)) | |
189 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
190 | break; | |
191 | ||
192 | default: | |
193 | return NULL; | |
194 | } | |
1da177e4 | 195 | |
287ac01a CS |
196 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
197 | erp_action->adapter = adapter; | |
198 | erp_action->port = port; | |
199 | erp_action->unit = unit; | |
200 | erp_action->action = need; | |
201 | erp_action->status = status; | |
1da177e4 | 202 | |
287ac01a | 203 | return erp_action; |
1da177e4 LT |
204 | } |
205 | ||
287ac01a CS |
206 | static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, |
207 | struct zfcp_port *port, | |
208 | struct zfcp_unit *unit, u8 id, void *ref) | |
1da177e4 | 209 | { |
287ac01a CS |
210 | int retval = 1, need; |
211 | struct zfcp_erp_action *act = NULL; | |
1da177e4 | 212 | |
287ac01a CS |
213 | if (!(atomic_read(&adapter->status) & |
214 | ZFCP_STATUS_ADAPTER_ERP_THREAD_UP)) | |
215 | return -EIO; | |
1da177e4 | 216 | |
287ac01a CS |
217 | need = zfcp_erp_required_act(want, adapter, port, unit); |
218 | if (!need) | |
1da177e4 | 219 | goto out; |
1da177e4 | 220 | |
287ac01a CS |
221 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); |
222 | act = zfcp_erp_setup_act(need, adapter, port, unit); | |
223 | if (!act) | |
224 | goto out; | |
225 | ++adapter->erp_total_count; | |
226 | list_add_tail(&act->list, &adapter->erp_ready_head); | |
227 | up(&adapter->erp_ready_sem); | |
228 | zfcp_rec_dbf_event_thread(1, adapter); | |
229 | retval = 0; | |
1da177e4 | 230 | out: |
287ac01a CS |
231 | zfcp_rec_dbf_event_trigger(id, ref, want, need, act, |
232 | adapter, port, unit); | |
1da177e4 LT |
233 | return retval; |
234 | } | |
235 | ||
287ac01a CS |
236 | static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, |
237 | int clear_mask, u8 id, void *ref) | |
238 | { | |
239 | zfcp_erp_adapter_block(adapter, clear_mask); | |
240 | ||
241 | /* ensure propagation of failed status to new devices */ | |
242 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
243 | zfcp_erp_adapter_failed(adapter, 13, NULL); | |
244 | return -EIO; | |
245 | } | |
246 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, | |
247 | adapter, NULL, NULL, id, ref); | |
248 | } | |
249 | ||
250 | /** | |
251 | * zfcp_erp_adapter_reopen - Reopen adapter. | |
252 | * @adapter: Adapter to reopen. | |
253 | * @clear: Status flags to clear. | |
254 | * @id: Id for debug trace event. | |
255 | * @ref: Reference for debug trace event. | |
1da177e4 | 256 | */ |
287ac01a CS |
257 | void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, |
258 | u8 id, void *ref) | |
1da177e4 | 259 | { |
1da177e4 | 260 | unsigned long flags; |
1da177e4 | 261 | |
1da177e4 LT |
262 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
263 | write_lock(&adapter->erp_lock); | |
287ac01a | 264 | _zfcp_erp_adapter_reopen(adapter, clear, id, ref); |
1da177e4 LT |
265 | write_unlock(&adapter->erp_lock); |
266 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
287ac01a | 267 | } |
1da177e4 | 268 | |
287ac01a CS |
269 | /** |
270 | * zfcp_erp_adapter_shutdown - Shutdown adapter. | |
271 | * @adapter: Adapter to shut down. | |
272 | * @clear: Status flags to clear. | |
273 | * @id: Id for debug trace event. | |
274 | * @ref: Reference for debug trace event. | |
275 | */ | |
276 | void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear, | |
277 | u8 id, void *ref) | |
278 | { | |
279 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
280 | zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref); | |
1da177e4 LT |
281 | } |
282 | ||
287ac01a CS |
283 | /** |
284 | * zfcp_erp_port_shutdown - Shutdown port | |
285 | * @port: Port to shut down. | |
286 | * @clear: Status flags to clear. | |
287 | * @id: Id for debug trace event. | |
288 | * @ref: Reference for debug trace event. | |
1da177e4 | 289 | */ |
287ac01a | 290 | void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, u8 id, void *ref) |
1da177e4 | 291 | { |
287ac01a CS |
292 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; |
293 | zfcp_erp_port_reopen(port, clear | flags, id, ref); | |
294 | } | |
295 | ||
296 | /** | |
297 | * zfcp_erp_unit_shutdown - Shutdown unit | |
298 | * @unit: Unit to shut down. | |
299 | * @clear: Status flags to clear. | |
300 | * @id: Id for debug trace event. | |
301 | * @ref: Reference for debug trace event. | |
302 | */ | |
303 | void zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear, u8 id, void *ref) | |
304 | { | |
305 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
306 | zfcp_erp_unit_reopen(unit, clear | flags, id, ref); | |
307 | } | |
308 | ||
309 | static void zfcp_erp_port_block(struct zfcp_port *port, int clear) | |
310 | { | |
311 | zfcp_erp_modify_port_status(port, 17, NULL, | |
312 | ZFCP_STATUS_COMMON_UNBLOCKED | clear, | |
313 | ZFCP_CLEAR); | |
314 | } | |
315 | ||
316 | static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, | |
317 | int clear, u8 id, void *ref) | |
318 | { | |
319 | zfcp_erp_port_block(port, clear); | |
320 | ||
321 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
322 | return; | |
1da177e4 | 323 | |
287ac01a CS |
324 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, |
325 | port->adapter, port, NULL, id, ref); | |
326 | } | |
327 | ||
328 | /** | |
329 | * zfcp_erp_port_forced_reopen - Forced close of port and open again | |
330 | * @port: Port to force close and to reopen. | |
331 | * @id: Id for debug trace event. | |
332 | * @ref: Reference for debug trace event. | |
333 | */ | |
334 | void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, u8 id, | |
335 | void *ref) | |
336 | { | |
337 | unsigned long flags; | |
338 | struct zfcp_adapter *adapter = port->adapter; | |
339 | ||
340 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
341 | write_lock(&adapter->erp_lock); | |
342 | _zfcp_erp_port_forced_reopen(port, clear, id, ref); | |
343 | write_unlock(&adapter->erp_lock); | |
344 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
345 | } | |
346 | ||
347 | static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, | |
348 | void *ref) | |
349 | { | |
350 | zfcp_erp_port_block(port, clear); | |
1da177e4 | 351 | |
287ac01a | 352 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1da177e4 | 353 | /* ensure propagation of failed status to new devices */ |
1f6f7129 | 354 | zfcp_erp_port_failed(port, 14, NULL); |
287ac01a | 355 | return -EIO; |
1da177e4 LT |
356 | } |
357 | ||
287ac01a CS |
358 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, |
359 | port->adapter, port, NULL, id, ref); | |
1da177e4 LT |
360 | } |
361 | ||
362 | /** | |
287ac01a CS |
363 | * zfcp_erp_port_reopen - trigger remote port recovery |
364 | * @port: port to recover | |
365 | * @clear_mask: flags in port status to be cleared | |
1da177e4 | 366 | * |
287ac01a | 367 | * Returns 0 if recovery has been triggered, < 0 if not. |
1da177e4 | 368 | */ |
287ac01a | 369 | int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, void *ref) |
1da177e4 | 370 | { |
1da177e4 | 371 | unsigned long flags; |
287ac01a | 372 | int retval; |
1da177e4 LT |
373 | struct zfcp_adapter *adapter = port->adapter; |
374 | ||
375 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
376 | write_lock(&adapter->erp_lock); | |
287ac01a | 377 | retval = _zfcp_erp_port_reopen(port, clear, id, ref); |
1da177e4 LT |
378 | write_unlock(&adapter->erp_lock); |
379 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
380 | ||
381 | return retval; | |
382 | } | |
383 | ||
287ac01a CS |
384 | static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) |
385 | { | |
386 | zfcp_erp_modify_unit_status(unit, 19, NULL, | |
387 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, | |
388 | ZFCP_CLEAR); | |
389 | } | |
390 | ||
391 | static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, | |
392 | void *ref) | |
1da177e4 | 393 | { |
1da177e4 LT |
394 | struct zfcp_adapter *adapter = unit->port->adapter; |
395 | ||
287ac01a | 396 | zfcp_erp_unit_block(unit, clear); |
1da177e4 | 397 | |
287ac01a CS |
398 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) |
399 | return; | |
1da177e4 | 400 | |
287ac01a CS |
401 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, |
402 | adapter, unit->port, unit, id, ref); | |
1da177e4 LT |
403 | } |
404 | ||
405 | /** | |
406 | * zfcp_erp_unit_reopen - initiate reopen of a unit | |
407 | * @unit: unit to be reopened | |
408 | * @clear_mask: specifies flags in unit status to be cleared | |
409 | * Return: 0 on success, < 0 on error | |
1da177e4 | 410 | */ |
287ac01a | 411 | void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, void *ref) |
1da177e4 | 412 | { |
1da177e4 | 413 | unsigned long flags; |
287ac01a CS |
414 | struct zfcp_port *port = unit->port; |
415 | struct zfcp_adapter *adapter = port->adapter; | |
1da177e4 LT |
416 | |
417 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
418 | write_lock(&adapter->erp_lock); | |
287ac01a | 419 | _zfcp_erp_unit_reopen(unit, clear, id, ref); |
1da177e4 LT |
420 | write_unlock(&adapter->erp_lock); |
421 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1da177e4 LT |
422 | } |
423 | ||
287ac01a | 424 | static int status_change_set(unsigned long mask, atomic_t *status) |
1da177e4 | 425 | { |
287ac01a | 426 | return (atomic_read(status) ^ mask) & mask; |
1da177e4 LT |
427 | } |
428 | ||
287ac01a | 429 | static int status_change_clear(unsigned long mask, atomic_t *status) |
698ec016 | 430 | { |
287ac01a | 431 | return atomic_read(status) & mask; |
698ec016 MP |
432 | } |
433 | ||
287ac01a | 434 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) |
698ec016 | 435 | { |
287ac01a CS |
436 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) |
437 | zfcp_rec_dbf_event_adapter(16, NULL, adapter); | |
438 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); | |
698ec016 MP |
439 | } |
440 | ||
287ac01a | 441 | static void zfcp_erp_port_unblock(struct zfcp_port *port) |
1da177e4 | 442 | { |
287ac01a CS |
443 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) |
444 | zfcp_rec_dbf_event_port(18, NULL, port); | |
445 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); | |
1da177e4 LT |
446 | } |
447 | ||
287ac01a | 448 | static void zfcp_erp_unit_unblock(struct zfcp_unit *unit) |
1da177e4 | 449 | { |
287ac01a CS |
450 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status)) |
451 | zfcp_rec_dbf_event_unit(20, NULL, unit); | |
452 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status); | |
1da177e4 LT |
453 | } |
454 | ||
287ac01a | 455 | static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) |
1da177e4 | 456 | { |
287ac01a CS |
457 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); |
458 | zfcp_rec_dbf_event_action(145, erp_action); | |
1da177e4 LT |
459 | } |
460 | ||
287ac01a | 461 | static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act) |
1da177e4 | 462 | { |
287ac01a | 463 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 464 | |
287ac01a CS |
465 | if (!act->fsf_req) |
466 | return; | |
1da177e4 | 467 | |
287ac01a CS |
468 | spin_lock(&adapter->req_list_lock); |
469 | if (zfcp_reqlist_find_safe(adapter, act->fsf_req) && | |
470 | act->fsf_req->erp_action == act) { | |
471 | if (act->status & (ZFCP_STATUS_ERP_DISMISSED | | |
472 | ZFCP_STATUS_ERP_TIMEDOUT)) { | |
473 | act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; | |
474 | zfcp_rec_dbf_event_action(142, act); | |
7ea633ff | 475 | act->fsf_req->erp_action = NULL; |
1da177e4 | 476 | } |
287ac01a CS |
477 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
478 | zfcp_rec_dbf_event_action(143, act); | |
479 | if (act->fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED | | |
480 | ZFCP_STATUS_FSFREQ_DISMISSED)) | |
481 | act->fsf_req = NULL; | |
482 | } else | |
483 | act->fsf_req = NULL; | |
484 | spin_unlock(&adapter->req_list_lock); | |
1da177e4 LT |
485 | } |
486 | ||
287ac01a CS |
487 | /** |
488 | * zfcp_erp_notify - Trigger ERP action. | |
489 | * @erp_action: ERP action to continue. | |
490 | * @set_mask: ERP action status flags to set. | |
1da177e4 | 491 | */ |
287ac01a | 492 | void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask) |
1da177e4 | 493 | { |
1da177e4 | 494 | struct zfcp_adapter *adapter = erp_action->adapter; |
287ac01a | 495 | unsigned long flags; |
1da177e4 | 496 | |
287ac01a | 497 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 498 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { |
1da177e4 LT |
499 | erp_action->status |= set_mask; |
500 | zfcp_erp_action_ready(erp_action); | |
1da177e4 | 501 | } |
1da177e4 | 502 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
503 | } |
504 | ||
287ac01a CS |
505 | /** |
506 | * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request | |
507 | * @data: ERP action (from timer data) | |
1da177e4 | 508 | */ |
287ac01a | 509 | void zfcp_erp_timeout_handler(unsigned long data) |
1da177e4 | 510 | { |
287ac01a CS |
511 | struct zfcp_erp_action *act = (struct zfcp_erp_action *) data; |
512 | zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT); | |
1da177e4 LT |
513 | } |
514 | ||
287ac01a | 515 | static void zfcp_erp_memwait_handler(unsigned long data) |
1da177e4 | 516 | { |
287ac01a | 517 | zfcp_erp_notify((struct zfcp_erp_action *)data, 0); |
1da177e4 LT |
518 | } |
519 | ||
287ac01a | 520 | static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) |
1da177e4 | 521 | { |
287ac01a CS |
522 | init_timer(&erp_action->timer); |
523 | erp_action->timer.function = zfcp_erp_memwait_handler; | |
524 | erp_action->timer.data = (unsigned long) erp_action; | |
525 | erp_action->timer.expires = jiffies + HZ; | |
526 | add_timer(&erp_action->timer); | |
1da177e4 LT |
527 | } |
528 | ||
287ac01a CS |
529 | static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, |
530 | int clear, u8 id, void *ref) | |
1da177e4 | 531 | { |
287ac01a | 532 | struct zfcp_port *port; |
1da177e4 | 533 | |
287ac01a | 534 | list_for_each_entry(port, &adapter->port_list_head, list) |
5ab944f9 | 535 | _zfcp_erp_port_reopen(port, clear, id, ref); |
1da177e4 LT |
536 | } |
537 | ||
287ac01a CS |
538 | static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear, u8 id, |
539 | void *ref) | |
1da177e4 | 540 | { |
287ac01a | 541 | struct zfcp_unit *unit; |
1da177e4 | 542 | |
287ac01a CS |
543 | list_for_each_entry(unit, &port->unit_list_head, list) |
544 | _zfcp_erp_unit_reopen(unit, clear, id, ref); | |
1da177e4 LT |
545 | } |
546 | ||
287ac01a | 547 | static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act) |
1da177e4 | 548 | { |
287ac01a CS |
549 | struct zfcp_adapter *adapter = act->adapter; |
550 | struct zfcp_port *port = act->port; | |
551 | struct zfcp_unit *unit = act->unit; | |
552 | u32 status = act->status; | |
1da177e4 | 553 | |
287ac01a CS |
554 | /* initiate follow-up actions depending on success of finished action */ |
555 | switch (act->action) { | |
1da177e4 | 556 | |
287ac01a CS |
557 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
558 | if (status == ZFCP_ERP_SUCCEEDED) | |
559 | _zfcp_erp_port_reopen_all(adapter, 0, 70, NULL); | |
560 | else | |
561 | _zfcp_erp_adapter_reopen(adapter, 0, 71, NULL); | |
562 | break; | |
1da177e4 | 563 | |
287ac01a CS |
564 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
565 | if (status == ZFCP_ERP_SUCCEEDED) | |
566 | _zfcp_erp_port_reopen(port, 0, 72, NULL); | |
567 | else | |
568 | _zfcp_erp_adapter_reopen(adapter, 0, 73, NULL); | |
569 | break; | |
1da177e4 | 570 | |
287ac01a CS |
571 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
572 | if (status == ZFCP_ERP_SUCCEEDED) | |
573 | _zfcp_erp_unit_reopen_all(port, 0, 74, NULL); | |
574 | else | |
575 | _zfcp_erp_port_forced_reopen(port, 0, 75, NULL); | |
576 | break; | |
1da177e4 | 577 | |
287ac01a CS |
578 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
579 | if (status != ZFCP_ERP_SUCCEEDED) | |
580 | _zfcp_erp_port_reopen(unit->port, 0, 76, NULL); | |
581 | break; | |
1da177e4 | 582 | } |
1da177e4 LT |
583 | } |
584 | ||
287ac01a | 585 | static void zfcp_erp_wakeup(struct zfcp_adapter *adapter) |
1da177e4 | 586 | { |
1da177e4 LT |
587 | unsigned long flags; |
588 | ||
1da177e4 | 589 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
287ac01a CS |
590 | read_lock(&adapter->erp_lock); |
591 | if (list_empty(&adapter->erp_ready_head) && | |
592 | list_empty(&adapter->erp_running_head)) { | |
593 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, | |
594 | &adapter->status); | |
595 | wake_up(&adapter->erp_done_wqh); | |
1da177e4 | 596 | } |
287ac01a CS |
597 | read_unlock(&adapter->erp_lock); |
598 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
599 | } | |
1da177e4 | 600 | |
287ac01a CS |
601 | static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act) |
602 | { | |
603 | if (zfcp_qdio_open(act->adapter)) | |
604 | return ZFCP_ERP_FAILED; | |
605 | init_waitqueue_head(&act->adapter->request_wq); | |
606 | atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status); | |
607 | return ZFCP_ERP_SUCCEEDED; | |
608 | } | |
1da177e4 | 609 | |
287ac01a CS |
610 | static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter) |
611 | { | |
612 | struct zfcp_port *port; | |
613 | port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, | |
614 | adapter->peer_d_id); | |
615 | if (IS_ERR(port)) /* error or port already attached */ | |
616 | return; | |
617 | _zfcp_erp_port_reopen(port, 0, 150, NULL); | |
618 | } | |
1da177e4 | 619 | |
287ac01a CS |
620 | static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action) |
621 | { | |
622 | int retries; | |
623 | int sleep = 1; | |
624 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1da177e4 | 625 | |
287ac01a CS |
626 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); |
627 | ||
628 | for (retries = 7; retries; retries--) { | |
629 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, | |
630 | &adapter->status); | |
631 | write_lock_irq(&adapter->erp_lock); | |
632 | zfcp_erp_action_to_running(erp_action); | |
633 | write_unlock_irq(&adapter->erp_lock); | |
634 | if (zfcp_fsf_exchange_config_data(erp_action)) { | |
635 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, | |
636 | &adapter->status); | |
637 | return ZFCP_ERP_FAILED; | |
1da177e4 | 638 | } |
1da177e4 | 639 | |
287ac01a CS |
640 | zfcp_rec_dbf_event_thread_lock(6, adapter); |
641 | down(&adapter->erp_ready_sem); | |
642 | zfcp_rec_dbf_event_thread_lock(7, adapter); | |
643 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) | |
644 | break; | |
1da177e4 | 645 | |
287ac01a CS |
646 | if (!(atomic_read(&adapter->status) & |
647 | ZFCP_STATUS_ADAPTER_HOST_CON_INIT)) | |
648 | break; | |
1da177e4 | 649 | |
287ac01a CS |
650 | ssleep(sleep); |
651 | sleep *= 2; | |
1da177e4 LT |
652 | } |
653 | ||
287ac01a CS |
654 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
655 | &adapter->status); | |
1da177e4 | 656 | |
287ac01a CS |
657 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK)) |
658 | return ZFCP_ERP_FAILED; | |
41fa2ada | 659 | |
287ac01a CS |
660 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) |
661 | zfcp_erp_enqueue_ptp_port(adapter); | |
1da177e4 | 662 | |
287ac01a | 663 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
664 | } |
665 | ||
287ac01a | 666 | static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act) |
1da177e4 | 667 | { |
287ac01a CS |
668 | int ret; |
669 | struct zfcp_adapter *adapter = act->adapter; | |
1da177e4 | 670 | |
287ac01a CS |
671 | write_lock_irq(&adapter->erp_lock); |
672 | zfcp_erp_action_to_running(act); | |
673 | write_unlock_irq(&adapter->erp_lock); | |
674 | ||
675 | ret = zfcp_fsf_exchange_port_data(act); | |
676 | if (ret == -EOPNOTSUPP) | |
677 | return ZFCP_ERP_SUCCEEDED; | |
678 | if (ret) | |
679 | return ZFCP_ERP_FAILED; | |
680 | ||
681 | zfcp_rec_dbf_event_thread_lock(8, adapter); | |
682 | down(&adapter->erp_ready_sem); | |
683 | zfcp_rec_dbf_event_thread_lock(9, adapter); | |
684 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) | |
685 | return ZFCP_ERP_FAILED; | |
686 | ||
687 | return ZFCP_ERP_SUCCEEDED; | |
1da177e4 LT |
688 | } |
689 | ||
287ac01a | 690 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) |
1da177e4 | 691 | { |
287ac01a CS |
692 | if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED) |
693 | return ZFCP_ERP_FAILED; | |
1da177e4 | 694 | |
287ac01a CS |
695 | if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) |
696 | return ZFCP_ERP_FAILED; | |
1da177e4 | 697 | |
287ac01a CS |
698 | atomic_set(&act->adapter->stat_miss, 16); |
699 | if (zfcp_status_read_refill(act->adapter)) | |
700 | return ZFCP_ERP_FAILED; | |
1da177e4 | 701 | |
287ac01a CS |
702 | return ZFCP_ERP_SUCCEEDED; |
703 | } | |
1da177e4 | 704 | |
287ac01a CS |
705 | static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *act, |
706 | int close) | |
707 | { | |
708 | int retval = ZFCP_ERP_SUCCEEDED; | |
709 | struct zfcp_adapter *adapter = act->adapter; | |
1da177e4 | 710 | |
287ac01a CS |
711 | if (close) |
712 | goto close_only; | |
713 | ||
714 | retval = zfcp_erp_adapter_strategy_open_qdio(act); | |
715 | if (retval != ZFCP_ERP_SUCCEEDED) | |
716 | goto failed_qdio; | |
1da177e4 | 717 | |
287ac01a CS |
718 | retval = zfcp_erp_adapter_strategy_open_fsf(act); |
719 | if (retval != ZFCP_ERP_SUCCEEDED) | |
720 | goto failed_openfcp; | |
721 | ||
722 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &act->adapter->status); | |
287ac01a CS |
723 | |
724 | return ZFCP_ERP_SUCCEEDED; | |
725 | ||
726 | close_only: | |
727 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, | |
728 | &act->adapter->status); | |
729 | ||
730 | failed_openfcp: | |
731 | /* close queues to ensure that buffers are not accessed by adapter */ | |
732 | zfcp_qdio_close(adapter); | |
733 | zfcp_fsf_req_dismiss_all(adapter); | |
734 | adapter->fsf_req_seq_no = 0; | |
735 | /* all ports and units are closed */ | |
736 | zfcp_erp_modify_adapter_status(adapter, 24, NULL, | |
737 | ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); | |
738 | failed_qdio: | |
739 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | | |
44cc76f2 | 740 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, |
287ac01a | 741 | &act->adapter->status); |
1da177e4 LT |
742 | return retval; |
743 | } | |
744 | ||
287ac01a | 745 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act) |
1da177e4 | 746 | { |
287ac01a | 747 | int retval; |
1da177e4 | 748 | |
287ac01a | 749 | zfcp_erp_adapter_strategy_generic(act, 1); /* close */ |
287ac01a CS |
750 | if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
751 | return ZFCP_ERP_EXIT; | |
752 | ||
287ac01a | 753 | retval = zfcp_erp_adapter_strategy_generic(act, 0); /* open */ |
287ac01a CS |
754 | |
755 | if (retval == ZFCP_ERP_FAILED) | |
756 | ssleep(8); | |
1da177e4 LT |
757 | |
758 | return retval; | |
759 | } | |
760 | ||
287ac01a | 761 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) |
1da177e4 | 762 | { |
287ac01a CS |
763 | int retval; |
764 | ||
765 | retval = zfcp_fsf_close_physical_port(act); | |
766 | if (retval == -ENOMEM) | |
767 | return ZFCP_ERP_NOMEM; | |
768 | act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; | |
769 | if (retval) | |
770 | return ZFCP_ERP_FAILED; | |
771 | ||
772 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
773 | } |
774 | ||
287ac01a | 775 | static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) |
1da177e4 | 776 | { |
44cc76f2 | 777 | atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | |
287ac01a CS |
778 | ZFCP_STATUS_PORT_PHYS_CLOSING | |
779 | ZFCP_STATUS_PORT_INVALID_WWPN, | |
780 | &port->status); | |
781 | } | |
1da177e4 | 782 | |
287ac01a CS |
783 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) |
784 | { | |
785 | struct zfcp_port *port = erp_action->port; | |
786 | int status = atomic_read(&port->status); | |
787 | ||
788 | switch (erp_action->step) { | |
789 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
790 | zfcp_erp_port_strategy_clearstati(port); | |
791 | if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) && | |
792 | (status & ZFCP_STATUS_COMMON_OPEN)) | |
793 | return zfcp_erp_port_forced_strategy_close(erp_action); | |
794 | else | |
795 | return ZFCP_ERP_FAILED; | |
796 | ||
797 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
798 | if (status & ZFCP_STATUS_PORT_PHYS_OPEN) | |
799 | return ZFCP_ERP_SUCCEEDED; | |
800 | } | |
801 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
802 | } |
803 | ||
287ac01a | 804 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) |
1da177e4 | 805 | { |
287ac01a | 806 | int retval; |
1da177e4 | 807 | |
287ac01a CS |
808 | retval = zfcp_fsf_close_port(erp_action); |
809 | if (retval == -ENOMEM) | |
810 | return ZFCP_ERP_NOMEM; | |
811 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; | |
812 | if (retval) | |
813 | return ZFCP_ERP_FAILED; | |
814 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
815 | } |
816 | ||
287ac01a | 817 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) |
1da177e4 | 818 | { |
287ac01a | 819 | int retval; |
1da177e4 | 820 | |
287ac01a CS |
821 | retval = zfcp_fsf_open_port(erp_action); |
822 | if (retval == -ENOMEM) | |
823 | return ZFCP_ERP_NOMEM; | |
824 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; | |
825 | if (retval) | |
826 | return ZFCP_ERP_FAILED; | |
827 | return ZFCP_ERP_CONTINUES; | |
828 | } | |
1da177e4 | 829 | |
287ac01a | 830 | static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act) |
1da177e4 | 831 | { |
287ac01a CS |
832 | struct zfcp_adapter *adapter = act->adapter; |
833 | struct zfcp_port *port = act->port; | |
1da177e4 | 834 | |
287ac01a | 835 | if (port->wwpn != adapter->peer_wwpn) { |
287ac01a CS |
836 | zfcp_erp_port_failed(port, 25, NULL); |
837 | return ZFCP_ERP_FAILED; | |
838 | } | |
839 | port->d_id = adapter->peer_d_id; | |
840 | atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status); | |
841 | return zfcp_erp_port_strategy_open_port(act); | |
842 | } | |
843 | ||
5ab944f9 SS |
844 | void zfcp_erp_port_strategy_open_lookup(struct work_struct *work) |
845 | { | |
846 | int retval; | |
847 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
848 | gid_pn_work); | |
849 | ||
850 | retval = zfcp_fc_ns_gid_pn(&port->erp_action); | |
851 | if (retval == -ENOMEM) | |
852 | zfcp_erp_notify(&port->erp_action, ZFCP_ERP_NOMEM); | |
853 | port->erp_action.step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP; | |
854 | if (retval) | |
855 | zfcp_erp_notify(&port->erp_action, ZFCP_ERP_FAILED); | |
856 | ||
857 | } | |
858 | ||
287ac01a CS |
859 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) |
860 | { | |
861 | struct zfcp_adapter *adapter = act->adapter; | |
862 | struct zfcp_port *port = act->port; | |
287ac01a CS |
863 | int p_status = atomic_read(&port->status); |
864 | ||
865 | switch (act->step) { | |
866 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
867 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
868 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
869 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) | |
870 | return zfcp_erp_open_ptp_port(act); | |
5ab944f9 | 871 | if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) { |
b7f15f3c | 872 | queue_work(zfcp_data.work_queue, &port->gid_pn_work); |
5ab944f9 | 873 | return ZFCP_ERP_CONTINUES; |
287ac01a | 874 | } |
287ac01a CS |
875 | case ZFCP_ERP_STEP_NAMESERVER_LOOKUP: |
876 | if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) { | |
877 | if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) { | |
878 | zfcp_erp_port_failed(port, 26, NULL); | |
879 | return ZFCP_ERP_EXIT; | |
880 | } | |
881 | return ZFCP_ERP_FAILED; | |
1da177e4 | 882 | } |
287ac01a CS |
883 | return zfcp_erp_port_strategy_open_port(act); |
884 | ||
885 | case ZFCP_ERP_STEP_PORT_OPENING: | |
886 | /* D_ID might have changed during open */ | |
5ab944f9 SS |
887 | if (p_status & ZFCP_STATUS_COMMON_OPEN) { |
888 | if (p_status & ZFCP_STATUS_PORT_DID_DID) | |
889 | return ZFCP_ERP_SUCCEEDED; | |
890 | else { | |
891 | act->step = ZFCP_ERP_STEP_PORT_CLOSING; | |
892 | return ZFCP_ERP_CONTINUES; | |
893 | } | |
287ac01a | 894 | /* fall through otherwise */ |
5ab944f9 | 895 | } |
287ac01a CS |
896 | } |
897 | return ZFCP_ERP_FAILED; | |
898 | } | |
899 | ||
287ac01a CS |
900 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) |
901 | { | |
902 | struct zfcp_port *port = erp_action->port; | |
903 | ||
5ab944f9 SS |
904 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) |
905 | goto close_init_done; | |
906 | ||
287ac01a CS |
907 | switch (erp_action->step) { |
908 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
909 | zfcp_erp_port_strategy_clearstati(port); | |
910 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN) | |
911 | return zfcp_erp_port_strategy_close(erp_action); | |
1da177e4 LT |
912 | break; |
913 | ||
287ac01a CS |
914 | case ZFCP_ERP_STEP_PORT_CLOSING: |
915 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN) | |
916 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
917 | break; |
918 | } | |
5ab944f9 SS |
919 | |
920 | close_init_done: | |
287ac01a CS |
921 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
922 | return ZFCP_ERP_EXIT; | |
1da177e4 | 923 | |
5ab944f9 | 924 | return zfcp_erp_port_strategy_open_common(erp_action); |
287ac01a CS |
925 | } |
926 | ||
927 | static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) | |
928 | { | |
44cc76f2 | 929 | atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | |
287ac01a CS |
930 | ZFCP_STATUS_UNIT_SHARED | |
931 | ZFCP_STATUS_UNIT_READONLY, | |
932 | &unit->status); | |
933 | } | |
934 | ||
935 | static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) | |
936 | { | |
937 | int retval = zfcp_fsf_close_unit(erp_action); | |
938 | if (retval == -ENOMEM) | |
939 | return ZFCP_ERP_NOMEM; | |
940 | erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; | |
941 | if (retval) | |
942 | return ZFCP_ERP_FAILED; | |
943 | return ZFCP_ERP_CONTINUES; | |
944 | } | |
945 | ||
946 | static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) | |
947 | { | |
948 | int retval = zfcp_fsf_open_unit(erp_action); | |
949 | if (retval == -ENOMEM) | |
950 | return ZFCP_ERP_NOMEM; | |
951 | erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; | |
952 | if (retval) | |
953 | return ZFCP_ERP_FAILED; | |
954 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
955 | } |
956 | ||
287ac01a | 957 | static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 | 958 | { |
287ac01a CS |
959 | struct zfcp_unit *unit = erp_action->unit; |
960 | ||
961 | switch (erp_action->step) { | |
962 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
963 | zfcp_erp_unit_strategy_clearstati(unit); | |
964 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) | |
965 | return zfcp_erp_unit_strategy_close(erp_action); | |
966 | /* already closed, fall through */ | |
967 | case ZFCP_ERP_STEP_UNIT_CLOSING: | |
968 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) | |
969 | return ZFCP_ERP_FAILED; | |
970 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
971 | return ZFCP_ERP_EXIT; | |
972 | return zfcp_erp_unit_strategy_open(erp_action); | |
973 | ||
974 | case ZFCP_ERP_STEP_UNIT_OPENING: | |
975 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) | |
976 | return ZFCP_ERP_SUCCEEDED; | |
977 | } | |
978 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
979 | } |
980 | ||
287ac01a | 981 | static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) |
1da177e4 | 982 | { |
1da177e4 LT |
983 | switch (result) { |
984 | case ZFCP_ERP_SUCCEEDED : | |
985 | atomic_set(&unit->erp_counter, 0); | |
986 | zfcp_erp_unit_unblock(unit); | |
987 | break; | |
988 | case ZFCP_ERP_FAILED : | |
989 | atomic_inc(&unit->erp_counter); | |
ff3b24fa CS |
990 | if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) { |
991 | dev_err(&unit->port->adapter->ccw_device->dev, | |
992 | "ERP failed for unit 0x%016Lx on " | |
993 | "port 0x%016Lx\n", | |
7ba58c9c SS |
994 | (unsigned long long)unit->fcp_lun, |
995 | (unsigned long long)unit->port->wwpn); | |
1f6f7129 | 996 | zfcp_erp_unit_failed(unit, 21, NULL); |
ff3b24fa | 997 | } |
1da177e4 | 998 | break; |
1da177e4 LT |
999 | } |
1000 | ||
287ac01a CS |
1001 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1002 | zfcp_erp_unit_block(unit, 0); | |
1da177e4 LT |
1003 | result = ZFCP_ERP_EXIT; |
1004 | } | |
1da177e4 LT |
1005 | return result; |
1006 | } | |
1007 | ||
287ac01a | 1008 | static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) |
1da177e4 | 1009 | { |
1da177e4 LT |
1010 | switch (result) { |
1011 | case ZFCP_ERP_SUCCEEDED : | |
1012 | atomic_set(&port->erp_counter, 0); | |
1013 | zfcp_erp_port_unblock(port); | |
1014 | break; | |
287ac01a | 1015 | |
1da177e4 | 1016 | case ZFCP_ERP_FAILED : |
287ac01a | 1017 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) { |
cc8c2829 SS |
1018 | zfcp_erp_port_block(port, 0); |
1019 | result = ZFCP_ERP_EXIT; | |
1020 | } | |
1da177e4 | 1021 | atomic_inc(&port->erp_counter); |
ff3b24fa CS |
1022 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) { |
1023 | dev_err(&port->adapter->ccw_device->dev, | |
1024 | "ERP failed for remote port 0x%016Lx\n", | |
7ba58c9c | 1025 | (unsigned long long)port->wwpn); |
1f6f7129 | 1026 | zfcp_erp_port_failed(port, 22, NULL); |
ff3b24fa | 1027 | } |
1da177e4 | 1028 | break; |
1da177e4 LT |
1029 | } |
1030 | ||
287ac01a CS |
1031 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1032 | zfcp_erp_port_block(port, 0); | |
1da177e4 LT |
1033 | result = ZFCP_ERP_EXIT; |
1034 | } | |
1da177e4 LT |
1035 | return result; |
1036 | } | |
1037 | ||
287ac01a CS |
1038 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, |
1039 | int result) | |
1da177e4 | 1040 | { |
1da177e4 LT |
1041 | switch (result) { |
1042 | case ZFCP_ERP_SUCCEEDED : | |
1043 | atomic_set(&adapter->erp_counter, 0); | |
1044 | zfcp_erp_adapter_unblock(adapter); | |
1045 | break; | |
287ac01a | 1046 | |
1da177e4 LT |
1047 | case ZFCP_ERP_FAILED : |
1048 | atomic_inc(&adapter->erp_counter); | |
ff3b24fa CS |
1049 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) { |
1050 | dev_err(&adapter->ccw_device->dev, | |
1051 | "ERP cannot recover an error " | |
1052 | "on the FCP device\n"); | |
1f6f7129 | 1053 | zfcp_erp_adapter_failed(adapter, 23, NULL); |
ff3b24fa | 1054 | } |
1da177e4 | 1055 | break; |
1da177e4 LT |
1056 | } |
1057 | ||
287ac01a CS |
1058 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1059 | zfcp_erp_adapter_block(adapter, 0); | |
1da177e4 LT |
1060 | result = ZFCP_ERP_EXIT; |
1061 | } | |
1da177e4 LT |
1062 | return result; |
1063 | } | |
1064 | ||
287ac01a CS |
1065 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, |
1066 | int result) | |
5f852be9 | 1067 | { |
287ac01a CS |
1068 | struct zfcp_adapter *adapter = erp_action->adapter; |
1069 | struct zfcp_port *port = erp_action->port; | |
1070 | struct zfcp_unit *unit = erp_action->unit; | |
1071 | ||
1072 | switch (erp_action->action) { | |
1073 | ||
1074 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1075 | result = zfcp_erp_strategy_check_unit(unit, result); | |
1076 | break; | |
1077 | ||
1078 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1079 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1080 | result = zfcp_erp_strategy_check_port(port, result); | |
1081 | break; | |
1082 | ||
1083 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1084 | result = zfcp_erp_strategy_check_adapter(adapter, result); | |
1085 | break; | |
1086 | } | |
1087 | return result; | |
5f852be9 CS |
1088 | } |
1089 | ||
287ac01a | 1090 | static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status) |
5f852be9 | 1091 | { |
287ac01a | 1092 | int status = atomic_read(target_status); |
5f852be9 | 1093 | |
287ac01a CS |
1094 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && |
1095 | (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1096 | return 1; /* take it online */ | |
5f852be9 | 1097 | |
287ac01a CS |
1098 | if (!(status & ZFCP_STATUS_COMMON_RUNNING) && |
1099 | !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1100 | return 1; /* take it offline */ | |
1101 | ||
1102 | return 0; | |
5f852be9 CS |
1103 | } |
1104 | ||
287ac01a | 1105 | static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret) |
1da177e4 | 1106 | { |
287ac01a CS |
1107 | int action = act->action; |
1108 | struct zfcp_adapter *adapter = act->adapter; | |
1109 | struct zfcp_port *port = act->port; | |
1110 | struct zfcp_unit *unit = act->unit; | |
1111 | u32 erp_status = act->status; | |
1da177e4 | 1112 | |
287ac01a | 1113 | switch (action) { |
1da177e4 | 1114 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
287ac01a CS |
1115 | if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) { |
1116 | _zfcp_erp_adapter_reopen(adapter, | |
1117 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
1118 | 67, NULL); | |
1119 | return ZFCP_ERP_EXIT; | |
1120 | } | |
1da177e4 LT |
1121 | break; |
1122 | ||
1123 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1da177e4 | 1124 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
287ac01a CS |
1125 | if (zfcp_erp_strat_change_det(&port->status, erp_status)) { |
1126 | _zfcp_erp_port_reopen(port, | |
1127 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
1128 | 68, NULL); | |
1129 | return ZFCP_ERP_EXIT; | |
1130 | } | |
1da177e4 LT |
1131 | break; |
1132 | ||
1133 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
287ac01a CS |
1134 | if (zfcp_erp_strat_change_det(&unit->status, erp_status)) { |
1135 | _zfcp_erp_unit_reopen(unit, | |
1136 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
1137 | 69, NULL); | |
1138 | return ZFCP_ERP_EXIT; | |
1139 | } | |
1da177e4 LT |
1140 | break; |
1141 | } | |
287ac01a | 1142 | return ret; |
1da177e4 LT |
1143 | } |
1144 | ||
287ac01a | 1145 | static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) |
1da177e4 | 1146 | { |
287ac01a | 1147 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1148 | |
287ac01a CS |
1149 | adapter->erp_total_count--; |
1150 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1151 | adapter->erp_low_mem_count--; | |
1152 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
507e4969 | 1153 | } |
1da177e4 | 1154 | |
287ac01a CS |
1155 | list_del(&erp_action->list); |
1156 | zfcp_rec_dbf_event_action(144, erp_action); | |
1da177e4 | 1157 | |
287ac01a CS |
1158 | switch (erp_action->action) { |
1159 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1160 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
1161 | &erp_action->unit->status); | |
1162 | break; | |
1da177e4 | 1163 | |
287ac01a CS |
1164 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
1165 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1166 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
1167 | &erp_action->port->status); | |
1168 | break; | |
1da177e4 | 1169 | |
287ac01a CS |
1170 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
1171 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
1172 | &erp_action->adapter->status); | |
1173 | break; | |
1174 | } | |
1da177e4 LT |
1175 | } |
1176 | ||
287ac01a CS |
1177 | struct zfcp_erp_add_work { |
1178 | struct zfcp_unit *unit; | |
1179 | struct work_struct work; | |
1180 | }; | |
1da177e4 | 1181 | |
287ac01a CS |
1182 | static void zfcp_erp_scsi_scan(struct work_struct *work) |
1183 | { | |
1184 | struct zfcp_erp_add_work *p = | |
1185 | container_of(work, struct zfcp_erp_add_work, work); | |
1186 | struct zfcp_unit *unit = p->unit; | |
1187 | struct fc_rport *rport = unit->port->rport; | |
26871c97 SS |
1188 | |
1189 | if (rport && rport->port_state == FC_PORTSTATE_ONLINE) | |
1190 | scsi_scan_target(&rport->dev, 0, rport->scsi_target_id, | |
0406289e | 1191 | scsilun_to_int((struct scsi_lun *)&unit->fcp_lun), 0); |
287ac01a CS |
1192 | atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); |
1193 | zfcp_unit_put(unit); | |
091694a5 | 1194 | wake_up(&unit->port->adapter->erp_done_wqh); |
287ac01a | 1195 | kfree(p); |
1da177e4 LT |
1196 | } |
1197 | ||
287ac01a | 1198 | static void zfcp_erp_schedule_work(struct zfcp_unit *unit) |
1da177e4 | 1199 | { |
287ac01a | 1200 | struct zfcp_erp_add_work *p; |
1da177e4 | 1201 | |
287ac01a CS |
1202 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
1203 | if (!p) { | |
1204 | dev_err(&unit->port->adapter->ccw_device->dev, | |
ff3b24fa | 1205 | "Registering unit 0x%016Lx on port 0x%016Lx failed\n", |
7ba58c9c SS |
1206 | (unsigned long long)unit->fcp_lun, |
1207 | (unsigned long long)unit->port->wwpn); | |
287ac01a | 1208 | return; |
1da177e4 | 1209 | } |
1da177e4 | 1210 | |
287ac01a CS |
1211 | zfcp_unit_get(unit); |
1212 | atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status); | |
1213 | INIT_WORK(&p->work, zfcp_erp_scsi_scan); | |
1214 | p->unit = unit; | |
b7f15f3c | 1215 | queue_work(zfcp_data.work_queue, &p->work); |
1da177e4 LT |
1216 | } |
1217 | ||
287ac01a | 1218 | static void zfcp_erp_rport_register(struct zfcp_port *port) |
1da177e4 | 1219 | { |
287ac01a CS |
1220 | struct fc_rport_identifiers ids; |
1221 | ids.node_name = port->wwnn; | |
1222 | ids.port_name = port->wwpn; | |
1223 | ids.port_id = port->d_id; | |
1224 | ids.roles = FC_RPORT_ROLE_FCP_TARGET; | |
1225 | port->rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids); | |
1226 | if (!port->rport) { | |
1227 | dev_err(&port->adapter->ccw_device->dev, | |
ff3b24fa | 1228 | "Registering port 0x%016Lx failed\n", |
7ba58c9c | 1229 | (unsigned long long)port->wwpn); |
287ac01a | 1230 | return; |
1da177e4 | 1231 | } |
1da177e4 | 1232 | |
287ac01a CS |
1233 | scsi_target_unblock(&port->rport->dev); |
1234 | port->rport->maxframe_size = port->maxframe_size; | |
1235 | port->rport->supported_classes = port->supported_classes; | |
1da177e4 LT |
1236 | } |
1237 | ||
287ac01a | 1238 | static void zfcp_erp_rports_del(struct zfcp_adapter *adapter) |
1da177e4 | 1239 | { |
1da177e4 | 1240 | struct zfcp_port *port; |
5ab944f9 | 1241 | list_for_each_entry(port, &adapter->port_list_head, list) { |
e4e9ba5d SS |
1242 | if (!port->rport) |
1243 | continue; | |
5ab944f9 SS |
1244 | fc_remote_port_delete(port->rport); |
1245 | port->rport = NULL; | |
1246 | } | |
1da177e4 LT |
1247 | } |
1248 | ||
287ac01a | 1249 | static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) |
1da177e4 | 1250 | { |
287ac01a CS |
1251 | struct zfcp_adapter *adapter = act->adapter; |
1252 | struct zfcp_port *port = act->port; | |
1253 | struct zfcp_unit *unit = act->unit; | |
1da177e4 | 1254 | |
287ac01a CS |
1255 | switch (act->action) { |
1256 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1257 | if ((result == ZFCP_ERP_SUCCEEDED) && | |
1258 | !unit->device && port->rport) { | |
1259 | atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED, | |
1260 | &unit->status); | |
1261 | if (!(atomic_read(&unit->status) & | |
1262 | ZFCP_STATUS_UNIT_SCSI_WORK_PENDING)) | |
1263 | zfcp_erp_schedule_work(unit); | |
1264 | } | |
1265 | zfcp_unit_put(unit); | |
1266 | break; | |
1da177e4 | 1267 | |
287ac01a CS |
1268 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
1269 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1270 | if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) { | |
1271 | zfcp_port_put(port); | |
1272 | return; | |
1273 | } | |
1274 | if ((result == ZFCP_ERP_SUCCEEDED) && !port->rport) | |
1275 | zfcp_erp_rport_register(port); | |
1276 | if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) { | |
1277 | fc_remote_port_delete(port->rport); | |
1278 | port->rport = NULL; | |
1279 | } | |
1280 | zfcp_port_put(port); | |
1281 | break; | |
1282 | ||
1283 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1284 | if (result != ZFCP_ERP_SUCCEEDED) | |
1285 | zfcp_erp_rports_del(adapter); | |
fca55b6f SS |
1286 | else |
1287 | schedule_work(&adapter->scan_work); | |
287ac01a CS |
1288 | zfcp_adapter_put(adapter); |
1289 | break; | |
1290 | } | |
1da177e4 LT |
1291 | } |
1292 | ||
287ac01a | 1293 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
1da177e4 | 1294 | { |
287ac01a CS |
1295 | switch (erp_action->action) { |
1296 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1297 | return zfcp_erp_adapter_strategy(erp_action); | |
1298 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1299 | return zfcp_erp_port_forced_strategy(erp_action); | |
1300 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1301 | return zfcp_erp_port_strategy(erp_action); | |
1302 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1303 | return zfcp_erp_unit_strategy(erp_action); | |
1304 | } | |
1305 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1306 | } |
1307 | ||
287ac01a | 1308 | static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 LT |
1309 | { |
1310 | int retval; | |
287ac01a CS |
1311 | struct zfcp_adapter *adapter = erp_action->adapter; |
1312 | unsigned long flags; | |
1da177e4 | 1313 | |
287ac01a CS |
1314 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
1315 | write_lock(&adapter->erp_lock); | |
1da177e4 | 1316 | |
287ac01a | 1317 | zfcp_erp_strategy_check_fsfreq(erp_action); |
1da177e4 | 1318 | |
287ac01a CS |
1319 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
1320 | zfcp_erp_action_dequeue(erp_action); | |
1321 | retval = ZFCP_ERP_DISMISSED; | |
1322 | goto unlock; | |
22753fa5 | 1323 | } |
1da177e4 | 1324 | |
2f8f3ed5 | 1325 | zfcp_erp_action_to_running(erp_action); |
1da177e4 | 1326 | |
287ac01a CS |
1327 | /* no lock to allow for blocking operations */ |
1328 | write_unlock(&adapter->erp_lock); | |
1329 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1330 | retval = zfcp_erp_strategy_do_action(erp_action); | |
1331 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
1332 | write_lock(&adapter->erp_lock); | |
1da177e4 | 1333 | |
287ac01a CS |
1334 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) |
1335 | retval = ZFCP_ERP_CONTINUES; | |
cc8c2829 | 1336 | |
287ac01a CS |
1337 | switch (retval) { |
1338 | case ZFCP_ERP_NOMEM: | |
1339 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { | |
1340 | ++adapter->erp_low_mem_count; | |
1341 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1342 | } |
287ac01a CS |
1343 | if (adapter->erp_total_count == adapter->erp_low_mem_count) |
1344 | _zfcp_erp_adapter_reopen(adapter, 0, 66, NULL); | |
1345 | else { | |
1346 | zfcp_erp_strategy_memwait(erp_action); | |
1347 | retval = ZFCP_ERP_CONTINUES; | |
1da177e4 | 1348 | } |
287ac01a | 1349 | goto unlock; |
1da177e4 | 1350 | |
287ac01a CS |
1351 | case ZFCP_ERP_CONTINUES: |
1352 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1353 | --adapter->erp_low_mem_count; | |
1354 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1355 | } |
287ac01a | 1356 | goto unlock; |
1da177e4 LT |
1357 | } |
1358 | ||
287ac01a CS |
1359 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
1360 | zfcp_erp_action_dequeue(erp_action); | |
1361 | retval = zfcp_erp_strategy_statechange(erp_action, retval); | |
1362 | if (retval == ZFCP_ERP_EXIT) | |
1363 | goto unlock; | |
1364 | zfcp_erp_strategy_followup_actions(erp_action); | |
1da177e4 | 1365 | |
287ac01a CS |
1366 | unlock: |
1367 | write_unlock(&adapter->erp_lock); | |
1368 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
1da177e4 | 1369 | |
287ac01a CS |
1370 | if (retval != ZFCP_ERP_CONTINUES) |
1371 | zfcp_erp_action_cleanup(erp_action, retval); | |
1da177e4 | 1372 | |
1da177e4 LT |
1373 | return retval; |
1374 | } | |
1375 | ||
287ac01a | 1376 | static int zfcp_erp_thread(void *data) |
1da177e4 | 1377 | { |
287ac01a CS |
1378 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
1379 | struct list_head *next; | |
1380 | struct zfcp_erp_action *act; | |
1381 | unsigned long flags; | |
1da177e4 | 1382 | |
b9d3aed7 | 1383 | daemonize("zfcperp%s", dev_name(&adapter->ccw_device->dev)); |
287ac01a CS |
1384 | /* Block all signals */ |
1385 | siginitsetinv(¤t->blocked, 0); | |
1386 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); | |
1387 | wake_up(&adapter->erp_thread_wqh); | |
1da177e4 | 1388 | |
287ac01a CS |
1389 | while (!(atomic_read(&adapter->status) & |
1390 | ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) { | |
1391 | write_lock_irqsave(&adapter->erp_lock, flags); | |
1392 | next = adapter->erp_ready_head.next; | |
1393 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1da177e4 | 1394 | |
287ac01a CS |
1395 | if (next != &adapter->erp_ready_head) { |
1396 | act = list_entry(next, struct zfcp_erp_action, list); | |
1da177e4 | 1397 | |
287ac01a CS |
1398 | /* there is more to come after dismission, no notify */ |
1399 | if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) | |
1400 | zfcp_erp_wakeup(adapter); | |
1da177e4 | 1401 | } |
1da177e4 | 1402 | |
9fb3cd86 | 1403 | zfcp_rec_dbf_event_thread_lock(4, adapter); |
287ac01a | 1404 | down_interruptible(&adapter->erp_ready_sem); |
9fb3cd86 | 1405 | zfcp_rec_dbf_event_thread_lock(5, adapter); |
1da177e4 LT |
1406 | } |
1407 | ||
287ac01a CS |
1408 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
1409 | wake_up(&adapter->erp_thread_wqh); | |
1da177e4 | 1410 | |
287ac01a CS |
1411 | return 0; |
1412 | } | |
1da177e4 | 1413 | |
287ac01a CS |
1414 | /** |
1415 | * zfcp_erp_thread_setup - Start ERP thread for adapter | |
1416 | * @adapter: Adapter to start the ERP thread for | |
1417 | * | |
1418 | * Returns 0 on success or error code from kernel_thread() | |
1419 | */ | |
1420 | int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) | |
1421 | { | |
1422 | int retval; | |
1da177e4 | 1423 | |
287ac01a CS |
1424 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status); |
1425 | retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD); | |
1426 | if (retval < 0) { | |
1427 | dev_err(&adapter->ccw_device->dev, | |
ff3b24fa | 1428 | "Creating an ERP thread for the FCP device failed.\n"); |
287ac01a | 1429 | return retval; |
1da177e4 | 1430 | } |
287ac01a CS |
1431 | wait_event(adapter->erp_thread_wqh, |
1432 | atomic_read(&adapter->status) & | |
1433 | ZFCP_STATUS_ADAPTER_ERP_THREAD_UP); | |
1434 | return 0; | |
1435 | } | |
1da177e4 | 1436 | |
287ac01a CS |
1437 | /** |
1438 | * zfcp_erp_thread_kill - Stop ERP thread. | |
1439 | * @adapter: Adapter where the ERP thread should be stopped. | |
1440 | * | |
1441 | * The caller of this routine ensures that the specified adapter has | |
1442 | * been shut down and that this operation has been completed. Thus, | |
1443 | * there are no pending erp_actions which would need to be handled | |
1444 | * here. | |
1445 | */ | |
1446 | void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) | |
1447 | { | |
1448 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status); | |
1449 | up(&adapter->erp_ready_sem); | |
41bfcf90 | 1450 | zfcp_rec_dbf_event_thread_lock(3, adapter); |
1da177e4 | 1451 | |
287ac01a CS |
1452 | wait_event(adapter->erp_thread_wqh, |
1453 | !(atomic_read(&adapter->status) & | |
1454 | ZFCP_STATUS_ADAPTER_ERP_THREAD_UP)); | |
1da177e4 | 1455 | |
287ac01a CS |
1456 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, |
1457 | &adapter->status); | |
1da177e4 LT |
1458 | } |
1459 | ||
287ac01a CS |
1460 | /** |
1461 | * zfcp_erp_adapter_failed - Set adapter status to failed. | |
1462 | * @adapter: Failed adapter. | |
1463 | * @id: Event id for debug trace. | |
1464 | * @ref: Reference for debug trace. | |
1465 | */ | |
1466 | void zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, void *ref) | |
1da177e4 | 1467 | { |
287ac01a CS |
1468 | zfcp_erp_modify_adapter_status(adapter, id, ref, |
1469 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
287ac01a | 1470 | } |
1da177e4 | 1471 | |
287ac01a CS |
1472 | /** |
1473 | * zfcp_erp_port_failed - Set port status to failed. | |
1474 | * @port: Failed port. | |
1475 | * @id: Event id for debug trace. | |
1476 | * @ref: Reference for debug trace. | |
1477 | */ | |
1478 | void zfcp_erp_port_failed(struct zfcp_port *port, u8 id, void *ref) | |
1479 | { | |
1480 | zfcp_erp_modify_port_status(port, id, ref, | |
1481 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
1da177e4 LT |
1482 | } |
1483 | ||
1484 | /** | |
287ac01a CS |
1485 | * zfcp_erp_unit_failed - Set unit status to failed. |
1486 | * @unit: Failed unit. | |
1487 | * @id: Event id for debug trace. | |
1488 | * @ref: Reference for debug trace. | |
1da177e4 | 1489 | */ |
287ac01a | 1490 | void zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref) |
1da177e4 | 1491 | { |
287ac01a CS |
1492 | zfcp_erp_modify_unit_status(unit, id, ref, |
1493 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
1da177e4 LT |
1494 | } |
1495 | ||
287ac01a CS |
1496 | /** |
1497 | * zfcp_erp_wait - wait for completion of error recovery on an adapter | |
1498 | * @adapter: adapter for which to wait for completion of its error recovery | |
1499 | */ | |
1500 | void zfcp_erp_wait(struct zfcp_adapter *adapter) | |
1501 | { | |
1502 | wait_event(adapter->erp_done_wqh, | |
1503 | !(atomic_read(&adapter->status) & | |
1504 | ZFCP_STATUS_ADAPTER_ERP_PENDING)); | |
1505 | } | |
1da177e4 | 1506 | |
287ac01a CS |
1507 | /** |
1508 | * zfcp_erp_modify_adapter_status - change adapter status bits | |
1509 | * @adapter: adapter to change the status | |
1510 | * @id: id for the debug trace | |
1511 | * @ref: reference for the debug trace | |
1512 | * @mask: status bits to change | |
1513 | * @set_or_clear: ZFCP_SET or ZFCP_CLEAR | |
1514 | * | |
1515 | * Changes in common status bits are propagated to attached ports and units. | |
1516 | */ | |
1517 | void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id, | |
1518 | void *ref, u32 mask, int set_or_clear) | |
1da177e4 | 1519 | { |
1da177e4 | 1520 | struct zfcp_port *port; |
287ac01a | 1521 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
1da177e4 | 1522 | |
287ac01a CS |
1523 | if (set_or_clear == ZFCP_SET) { |
1524 | if (status_change_set(mask, &adapter->status)) | |
1525 | zfcp_rec_dbf_event_adapter(id, ref, adapter); | |
1526 | atomic_set_mask(mask, &adapter->status); | |
1527 | } else { | |
1528 | if (status_change_clear(mask, &adapter->status)) | |
1529 | zfcp_rec_dbf_event_adapter(id, ref, adapter); | |
1530 | atomic_clear_mask(mask, &adapter->status); | |
1531 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1532 | atomic_set(&adapter->erp_counter, 0); | |
1533 | } | |
1534 | ||
1535 | if (common_mask) | |
1da177e4 | 1536 | list_for_each_entry(port, &adapter->port_list_head, list) |
287ac01a CS |
1537 | zfcp_erp_modify_port_status(port, id, ref, common_mask, |
1538 | set_or_clear); | |
1da177e4 LT |
1539 | } |
1540 | ||
287ac01a CS |
1541 | /** |
1542 | * zfcp_erp_modify_port_status - change port status bits | |
1543 | * @port: port to change the status bits | |
1544 | * @id: id for the debug trace | |
1545 | * @ref: reference for the debug trace | |
1546 | * @mask: status bits to change | |
1547 | * @set_or_clear: ZFCP_SET or ZFCP_CLEAR | |
1548 | * | |
1549 | * Changes in common status bits are propagated to attached units. | |
1550 | */ | |
1551 | void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, void *ref, | |
1552 | u32 mask, int set_or_clear) | |
1da177e4 | 1553 | { |
1da177e4 | 1554 | struct zfcp_unit *unit; |
287ac01a | 1555 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
1da177e4 | 1556 | |
287ac01a CS |
1557 | if (set_or_clear == ZFCP_SET) { |
1558 | if (status_change_set(mask, &port->status)) | |
1559 | zfcp_rec_dbf_event_port(id, ref, port); | |
1560 | atomic_set_mask(mask, &port->status); | |
1561 | } else { | |
1562 | if (status_change_clear(mask, &port->status)) | |
1563 | zfcp_rec_dbf_event_port(id, ref, port); | |
1564 | atomic_clear_mask(mask, &port->status); | |
1565 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1566 | atomic_set(&port->erp_counter, 0); | |
1567 | } | |
1da177e4 | 1568 | |
287ac01a CS |
1569 | if (common_mask) |
1570 | list_for_each_entry(unit, &port->unit_list_head, list) | |
1571 | zfcp_erp_modify_unit_status(unit, id, ref, common_mask, | |
1572 | set_or_clear); | |
1da177e4 LT |
1573 | } |
1574 | ||
287ac01a CS |
1575 | /** |
1576 | * zfcp_erp_modify_unit_status - change unit status bits | |
1577 | * @unit: unit to change the status bits | |
1578 | * @id: id for the debug trace | |
1579 | * @ref: reference for the debug trace | |
1580 | * @mask: status bits to change | |
1581 | * @set_or_clear: ZFCP_SET or ZFCP_CLEAR | |
1582 | */ | |
1583 | void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, void *ref, | |
1584 | u32 mask, int set_or_clear) | |
1da177e4 | 1585 | { |
287ac01a CS |
1586 | if (set_or_clear == ZFCP_SET) { |
1587 | if (status_change_set(mask, &unit->status)) | |
1588 | zfcp_rec_dbf_event_unit(id, ref, unit); | |
1589 | atomic_set_mask(mask, &unit->status); | |
1590 | } else { | |
1591 | if (status_change_clear(mask, &unit->status)) | |
1592 | zfcp_rec_dbf_event_unit(id, ref, unit); | |
1593 | atomic_clear_mask(mask, &unit->status); | |
1594 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
1595 | atomic_set(&unit->erp_counter, 0); | |
1596 | } | |
1597 | } | |
1da177e4 LT |
1598 | } |
1599 | ||
287ac01a CS |
1600 | /** |
1601 | * zfcp_erp_port_boxed - Mark port as "boxed" and start ERP | |
1602 | * @port: The "boxed" port. | |
1603 | * @id: The debug trace id. | |
1604 | * @id: Reference for the debug trace. | |
1605 | */ | |
1f6f7129 | 1606 | void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, void *ref) |
d736a27b | 1607 | { |
d736a27b AH |
1608 | unsigned long flags; |
1609 | ||
d736a27b | 1610 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
698ec016 MP |
1611 | zfcp_erp_modify_port_status(port, id, ref, |
1612 | ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET); | |
d736a27b | 1613 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
9467a9b3 | 1614 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
d736a27b AH |
1615 | } |
1616 | ||
287ac01a CS |
1617 | /** |
1618 | * zfcp_erp_unit_boxed - Mark unit as "boxed" and start ERP | |
1619 | * @port: The "boxed" unit. | |
1620 | * @id: The debug trace id. | |
1621 | * @id: Reference for the debug trace. | |
1622 | */ | |
1f6f7129 | 1623 | void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, void *ref) |
d736a27b | 1624 | { |
698ec016 MP |
1625 | zfcp_erp_modify_unit_status(unit, id, ref, |
1626 | ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET); | |
9467a9b3 | 1627 | zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
d736a27b AH |
1628 | } |
1629 | ||
287ac01a CS |
1630 | /** |
1631 | * zfcp_erp_port_access_denied - Adapter denied access to port. | |
1632 | * @port: port where access has been denied | |
1633 | * @id: id for debug trace | |
1634 | * @ref: reference for debug trace | |
1635 | * | |
1636 | * Since the adapter has denied access, stop using the port and the | |
1637 | * attached units. | |
1638 | */ | |
1f6f7129 | 1639 | void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, void *ref) |
1da177e4 | 1640 | { |
1da177e4 LT |
1641 | unsigned long flags; |
1642 | ||
1da177e4 | 1643 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
698ec016 MP |
1644 | zfcp_erp_modify_port_status(port, id, ref, |
1645 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
1646 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); | |
1da177e4 LT |
1647 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
1648 | } | |
1649 | ||
287ac01a CS |
1650 | /** |
1651 | * zfcp_erp_unit_access_denied - Adapter denied access to unit. | |
1652 | * @unit: unit where access has been denied | |
1653 | * @id: id for debug trace | |
1654 | * @ref: reference for debug trace | |
1655 | * | |
1656 | * Since the adapter has denied access, stop using the unit. | |
1657 | */ | |
1f6f7129 | 1658 | void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, void *ref) |
1da177e4 | 1659 | { |
698ec016 MP |
1660 | zfcp_erp_modify_unit_status(unit, id, ref, |
1661 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
1662 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); | |
1da177e4 LT |
1663 | } |
1664 | ||
287ac01a CS |
1665 | static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id, |
1666 | void *ref) | |
1da177e4 | 1667 | { |
287ac01a CS |
1668 | int status = atomic_read(&unit->status); |
1669 | if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | | |
1670 | ZFCP_STATUS_COMMON_ACCESS_BOXED))) | |
aef4a983 MS |
1671 | return; |
1672 | ||
287ac01a | 1673 | zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
1da177e4 LT |
1674 | } |
1675 | ||
287ac01a CS |
1676 | static void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id, |
1677 | void *ref) | |
1da177e4 | 1678 | { |
1da177e4 | 1679 | struct zfcp_unit *unit; |
287ac01a | 1680 | int status = atomic_read(&port->status); |
1da177e4 | 1681 | |
287ac01a CS |
1682 | if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | |
1683 | ZFCP_STATUS_COMMON_ACCESS_BOXED))) { | |
5ab944f9 SS |
1684 | list_for_each_entry(unit, &port->unit_list_head, list) |
1685 | zfcp_erp_unit_access_changed(unit, id, ref); | |
1da177e4 LT |
1686 | return; |
1687 | } | |
1688 | ||
553448f6 | 1689 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
1da177e4 LT |
1690 | } |
1691 | ||
287ac01a CS |
1692 | /** |
1693 | * zfcp_erp_adapter_access_changed - Process change in adapter ACT | |
1694 | * @adapter: Adapter where the Access Control Table (ACT) changed | |
1695 | * @id: Id for debug trace | |
1696 | * @ref: Reference for debug trace | |
1697 | */ | |
1698 | void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id, | |
1699 | void *ref) | |
1da177e4 | 1700 | { |
287ac01a CS |
1701 | struct zfcp_port *port; |
1702 | unsigned long flags; | |
1703 | ||
1704 | if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) | |
1da177e4 LT |
1705 | return; |
1706 | ||
287ac01a | 1707 | read_lock_irqsave(&zfcp_data.config_lock, flags); |
287ac01a | 1708 | list_for_each_entry(port, &adapter->port_list_head, list) |
5ab944f9 | 1709 | zfcp_erp_port_access_changed(port, id, ref); |
287ac01a | 1710 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
1da177e4 | 1711 | } |