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Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Error Recovery Procedures (ERP). |
41fa2ada | 5 | * |
615f59e0 | 6 | * Copyright IBM Corporation 2002, 2010 |
1da177e4 LT |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
347c6a96 | 12 | #include <linux/kthread.h> |
1da177e4 | 13 | #include "zfcp_ext.h" |
b6bd2fb9 | 14 | #include "zfcp_reqlist.h" |
1da177e4 | 15 | |
287ac01a CS |
16 | #define ZFCP_MAX_ERPS 3 |
17 | ||
18 | enum zfcp_erp_act_flags { | |
19 | ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000, | |
20 | ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000, | |
21 | ZFCP_STATUS_ERP_DISMISSING = 0x00100000, | |
22 | ZFCP_STATUS_ERP_DISMISSED = 0x00200000, | |
23 | ZFCP_STATUS_ERP_LOWMEM = 0x00400000, | |
24 | }; | |
1da177e4 | 25 | |
287ac01a CS |
26 | enum zfcp_erp_steps { |
27 | ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, | |
28 | ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001, | |
29 | ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, | |
30 | ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, | |
287ac01a CS |
31 | ZFCP_ERP_STEP_PORT_OPENING = 0x0800, |
32 | ZFCP_ERP_STEP_UNIT_CLOSING = 0x1000, | |
33 | ZFCP_ERP_STEP_UNIT_OPENING = 0x2000, | |
34 | }; | |
35 | ||
36 | enum zfcp_erp_act_type { | |
37 | ZFCP_ERP_ACTION_REOPEN_UNIT = 1, | |
38 | ZFCP_ERP_ACTION_REOPEN_PORT = 2, | |
39 | ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, | |
40 | ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4, | |
41 | }; | |
42 | ||
43 | enum zfcp_erp_act_state { | |
44 | ZFCP_ERP_ACTION_RUNNING = 1, | |
45 | ZFCP_ERP_ACTION_READY = 2, | |
46 | }; | |
47 | ||
48 | enum zfcp_erp_act_result { | |
49 | ZFCP_ERP_SUCCEEDED = 0, | |
50 | ZFCP_ERP_FAILED = 1, | |
51 | ZFCP_ERP_CONTINUES = 2, | |
52 | ZFCP_ERP_EXIT = 3, | |
53 | ZFCP_ERP_DISMISSED = 4, | |
54 | ZFCP_ERP_NOMEM = 5, | |
55 | }; | |
56 | ||
57 | static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask) | |
1da177e4 | 58 | { |
5ffd51a5 | 59 | zfcp_erp_modify_adapter_status(adapter, "erablk1", NULL, |
287ac01a CS |
60 | ZFCP_STATUS_COMMON_UNBLOCKED | mask, |
61 | ZFCP_CLEAR); | |
2abbe866 | 62 | } |
1da177e4 | 63 | |
287ac01a | 64 | static int zfcp_erp_action_exists(struct zfcp_erp_action *act) |
2abbe866 | 65 | { |
287ac01a CS |
66 | struct zfcp_erp_action *curr_act; |
67 | ||
68 | list_for_each_entry(curr_act, &act->adapter->erp_running_head, list) | |
69 | if (act == curr_act) | |
70 | return ZFCP_ERP_ACTION_RUNNING; | |
71 | return 0; | |
1da177e4 LT |
72 | } |
73 | ||
287ac01a | 74 | static void zfcp_erp_action_ready(struct zfcp_erp_action *act) |
2abbe866 | 75 | { |
287ac01a CS |
76 | struct zfcp_adapter *adapter = act->adapter; |
77 | ||
78 | list_move(&act->list, &act->adapter->erp_ready_head); | |
5771710b | 79 | zfcp_dbf_rec_action("erardy1", act); |
347c6a96 | 80 | wake_up(&adapter->erp_ready_wq); |
5771710b | 81 | zfcp_dbf_rec_thread("erardy2", adapter->dbf); |
2abbe866 AH |
82 | } |
83 | ||
287ac01a | 84 | static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act) |
1da177e4 | 85 | { |
287ac01a CS |
86 | act->status |= ZFCP_STATUS_ERP_DISMISSED; |
87 | if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING) | |
88 | zfcp_erp_action_ready(act); | |
89 | } | |
1da177e4 | 90 | |
287ac01a CS |
91 | static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit) |
92 | { | |
93 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE) | |
94 | zfcp_erp_action_dismiss(&unit->erp_action); | |
95 | } | |
1da177e4 | 96 | |
287ac01a CS |
97 | static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) |
98 | { | |
99 | struct zfcp_unit *unit; | |
1da177e4 | 100 | |
287ac01a CS |
101 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
102 | zfcp_erp_action_dismiss(&port->erp_action); | |
ecf0c772 SS |
103 | else { |
104 | read_lock(&port->unit_list_lock); | |
105 | list_for_each_entry(unit, &port->unit_list, list) | |
106 | zfcp_erp_action_dismiss_unit(unit); | |
107 | read_unlock(&port->unit_list_lock); | |
108 | } | |
1da177e4 LT |
109 | } |
110 | ||
287ac01a | 111 | static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) |
1da177e4 | 112 | { |
287ac01a | 113 | struct zfcp_port *port; |
1da177e4 | 114 | |
287ac01a CS |
115 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
116 | zfcp_erp_action_dismiss(&adapter->erp_action); | |
ecf0c772 SS |
117 | else { |
118 | read_lock(&adapter->port_list_lock); | |
119 | list_for_each_entry(port, &adapter->port_list, list) | |
287ac01a | 120 | zfcp_erp_action_dismiss_port(port); |
ecf0c772 SS |
121 | read_unlock(&adapter->port_list_lock); |
122 | } | |
1da177e4 LT |
123 | } |
124 | ||
287ac01a CS |
125 | static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter, |
126 | struct zfcp_port *port, | |
127 | struct zfcp_unit *unit) | |
1da177e4 | 128 | { |
287ac01a CS |
129 | int need = want; |
130 | int u_status, p_status, a_status; | |
1da177e4 | 131 | |
287ac01a CS |
132 | switch (want) { |
133 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
134 | u_status = atomic_read(&unit->status); | |
135 | if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
136 | return 0; | |
137 | p_status = atomic_read(&port->status); | |
138 | if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) || | |
139 | p_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
140 | return 0; | |
141 | if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED)) | |
142 | need = ZFCP_ERP_ACTION_REOPEN_PORT; | |
143 | /* fall through */ | |
144 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
145 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
146 | p_status = atomic_read(&port->status); | |
147 | if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
148 | return 0; | |
149 | a_status = atomic_read(&adapter->status); | |
150 | if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) || | |
151 | a_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
152 | return 0; | |
153 | if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED)) | |
154 | need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; | |
155 | /* fall through */ | |
156 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
157 | a_status = atomic_read(&adapter->status); | |
158 | if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
159 | return 0; | |
143bb6bf CS |
160 | if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) && |
161 | !(a_status & ZFCP_STATUS_COMMON_OPEN)) | |
162 | return 0; /* shutdown requested for closed adapter */ | |
287ac01a | 163 | } |
1da177e4 | 164 | |
287ac01a | 165 | return need; |
1da177e4 LT |
166 | } |
167 | ||
287ac01a CS |
168 | static struct zfcp_erp_action *zfcp_erp_setup_act(int need, |
169 | struct zfcp_adapter *adapter, | |
170 | struct zfcp_port *port, | |
171 | struct zfcp_unit *unit) | |
1da177e4 | 172 | { |
287ac01a CS |
173 | struct zfcp_erp_action *erp_action; |
174 | u32 status = 0; | |
1da177e4 | 175 | |
287ac01a CS |
176 | switch (need) { |
177 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
615f59e0 | 178 | if (!get_device(&unit->dev)) |
6b183334 | 179 | return NULL; |
287ac01a CS |
180 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status); |
181 | erp_action = &unit->erp_action; | |
182 | if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING)) | |
183 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
184 | break; | |
1da177e4 | 185 | |
287ac01a CS |
186 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
187 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
615f59e0 | 188 | if (!get_device(&port->dev)) |
6b183334 | 189 | return NULL; |
287ac01a CS |
190 | zfcp_erp_action_dismiss_port(port); |
191 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); | |
192 | erp_action = &port->erp_action; | |
193 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING)) | |
194 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
195 | break; | |
1da177e4 | 196 | |
287ac01a | 197 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
f3450c7b | 198 | kref_get(&adapter->ref); |
287ac01a CS |
199 | zfcp_erp_action_dismiss_adapter(adapter); |
200 | atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); | |
201 | erp_action = &adapter->erp_action; | |
202 | if (!(atomic_read(&adapter->status) & | |
203 | ZFCP_STATUS_COMMON_RUNNING)) | |
204 | status = ZFCP_STATUS_ERP_CLOSE_ONLY; | |
205 | break; | |
206 | ||
207 | default: | |
208 | return NULL; | |
209 | } | |
1da177e4 | 210 | |
287ac01a CS |
211 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
212 | erp_action->adapter = adapter; | |
213 | erp_action->port = port; | |
214 | erp_action->unit = unit; | |
215 | erp_action->action = need; | |
216 | erp_action->status = status; | |
1da177e4 | 217 | |
287ac01a | 218 | return erp_action; |
1da177e4 LT |
219 | } |
220 | ||
287ac01a CS |
221 | static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, |
222 | struct zfcp_port *port, | |
5ffd51a5 | 223 | struct zfcp_unit *unit, char *id, void *ref) |
1da177e4 | 224 | { |
287ac01a CS |
225 | int retval = 1, need; |
226 | struct zfcp_erp_action *act = NULL; | |
1da177e4 | 227 | |
347c6a96 | 228 | if (!adapter->erp_thread) |
287ac01a | 229 | return -EIO; |
1da177e4 | 230 | |
287ac01a CS |
231 | need = zfcp_erp_required_act(want, adapter, port, unit); |
232 | if (!need) | |
1da177e4 | 233 | goto out; |
1da177e4 | 234 | |
287ac01a CS |
235 | atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); |
236 | act = zfcp_erp_setup_act(need, adapter, port, unit); | |
237 | if (!act) | |
238 | goto out; | |
239 | ++adapter->erp_total_count; | |
240 | list_add_tail(&act->list, &adapter->erp_ready_head); | |
347c6a96 | 241 | wake_up(&adapter->erp_ready_wq); |
5771710b | 242 | zfcp_dbf_rec_thread("eracte1", adapter->dbf); |
287ac01a | 243 | retval = 0; |
1da177e4 | 244 | out: |
5771710b | 245 | zfcp_dbf_rec_trigger(id, ref, want, need, act, adapter, port, unit); |
1da177e4 LT |
246 | return retval; |
247 | } | |
248 | ||
287ac01a | 249 | static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, |
5ffd51a5 | 250 | int clear_mask, char *id, void *ref) |
287ac01a CS |
251 | { |
252 | zfcp_erp_adapter_block(adapter, clear_mask); | |
a2fa0aed | 253 | zfcp_scsi_schedule_rports_block(adapter); |
287ac01a CS |
254 | |
255 | /* ensure propagation of failed status to new devices */ | |
256 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
5ffd51a5 | 257 | zfcp_erp_adapter_failed(adapter, "erareo1", NULL); |
287ac01a CS |
258 | return -EIO; |
259 | } | |
260 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, | |
261 | adapter, NULL, NULL, id, ref); | |
262 | } | |
263 | ||
264 | /** | |
265 | * zfcp_erp_adapter_reopen - Reopen adapter. | |
266 | * @adapter: Adapter to reopen. | |
267 | * @clear: Status flags to clear. | |
268 | * @id: Id for debug trace event. | |
269 | * @ref: Reference for debug trace event. | |
1da177e4 | 270 | */ |
287ac01a | 271 | void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, |
5ffd51a5 | 272 | char *id, void *ref) |
1da177e4 | 273 | { |
1da177e4 | 274 | unsigned long flags; |
1da177e4 | 275 | |
ecf0c772 SS |
276 | zfcp_erp_adapter_block(adapter, clear); |
277 | zfcp_scsi_schedule_rports_block(adapter); | |
278 | ||
279 | write_lock_irqsave(&adapter->erp_lock, flags); | |
280 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
281 | zfcp_erp_adapter_failed(adapter, "erareo1", NULL); | |
282 | else | |
283 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, adapter, | |
284 | NULL, NULL, id, ref); | |
285 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
287ac01a | 286 | } |
1da177e4 | 287 | |
287ac01a CS |
288 | /** |
289 | * zfcp_erp_adapter_shutdown - Shutdown adapter. | |
290 | * @adapter: Adapter to shut down. | |
291 | * @clear: Status flags to clear. | |
292 | * @id: Id for debug trace event. | |
293 | * @ref: Reference for debug trace event. | |
294 | */ | |
295 | void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear, | |
5ffd51a5 | 296 | char *id, void *ref) |
287ac01a CS |
297 | { |
298 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
299 | zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref); | |
1da177e4 LT |
300 | } |
301 | ||
287ac01a CS |
302 | /** |
303 | * zfcp_erp_port_shutdown - Shutdown port | |
304 | * @port: Port to shut down. | |
305 | * @clear: Status flags to clear. | |
306 | * @id: Id for debug trace event. | |
307 | * @ref: Reference for debug trace event. | |
1da177e4 | 308 | */ |
5ffd51a5 SS |
309 | void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *id, |
310 | void *ref) | |
1da177e4 | 311 | { |
287ac01a CS |
312 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; |
313 | zfcp_erp_port_reopen(port, clear | flags, id, ref); | |
314 | } | |
315 | ||
316 | /** | |
317 | * zfcp_erp_unit_shutdown - Shutdown unit | |
318 | * @unit: Unit to shut down. | |
319 | * @clear: Status flags to clear. | |
320 | * @id: Id for debug trace event. | |
321 | * @ref: Reference for debug trace event. | |
322 | */ | |
5ffd51a5 SS |
323 | void zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear, char *id, |
324 | void *ref) | |
287ac01a CS |
325 | { |
326 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
327 | zfcp_erp_unit_reopen(unit, clear | flags, id, ref); | |
328 | } | |
329 | ||
330 | static void zfcp_erp_port_block(struct zfcp_port *port, int clear) | |
331 | { | |
5ffd51a5 | 332 | zfcp_erp_modify_port_status(port, "erpblk1", NULL, |
287ac01a CS |
333 | ZFCP_STATUS_COMMON_UNBLOCKED | clear, |
334 | ZFCP_CLEAR); | |
335 | } | |
336 | ||
337 | static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, | |
5ffd51a5 | 338 | int clear, char *id, void *ref) |
287ac01a CS |
339 | { |
340 | zfcp_erp_port_block(port, clear); | |
a2fa0aed | 341 | zfcp_scsi_schedule_rport_block(port); |
287ac01a CS |
342 | |
343 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
344 | return; | |
1da177e4 | 345 | |
287ac01a CS |
346 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, |
347 | port->adapter, port, NULL, id, ref); | |
348 | } | |
349 | ||
350 | /** | |
351 | * zfcp_erp_port_forced_reopen - Forced close of port and open again | |
352 | * @port: Port to force close and to reopen. | |
353 | * @id: Id for debug trace event. | |
354 | * @ref: Reference for debug trace event. | |
355 | */ | |
5ffd51a5 | 356 | void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, char *id, |
287ac01a CS |
357 | void *ref) |
358 | { | |
359 | unsigned long flags; | |
360 | struct zfcp_adapter *adapter = port->adapter; | |
361 | ||
ecf0c772 | 362 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 363 | _zfcp_erp_port_forced_reopen(port, clear, id, ref); |
ecf0c772 | 364 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a CS |
365 | } |
366 | ||
5ffd51a5 | 367 | static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id, |
287ac01a CS |
368 | void *ref) |
369 | { | |
370 | zfcp_erp_port_block(port, clear); | |
a2fa0aed | 371 | zfcp_scsi_schedule_rport_block(port); |
1da177e4 | 372 | |
287ac01a | 373 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1da177e4 | 374 | /* ensure propagation of failed status to new devices */ |
5ffd51a5 | 375 | zfcp_erp_port_failed(port, "erpreo1", NULL); |
287ac01a | 376 | return -EIO; |
1da177e4 LT |
377 | } |
378 | ||
287ac01a CS |
379 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, |
380 | port->adapter, port, NULL, id, ref); | |
1da177e4 LT |
381 | } |
382 | ||
383 | /** | |
287ac01a CS |
384 | * zfcp_erp_port_reopen - trigger remote port recovery |
385 | * @port: port to recover | |
386 | * @clear_mask: flags in port status to be cleared | |
1da177e4 | 387 | * |
287ac01a | 388 | * Returns 0 if recovery has been triggered, < 0 if not. |
1da177e4 | 389 | */ |
5ffd51a5 | 390 | int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id, void *ref) |
1da177e4 | 391 | { |
287ac01a | 392 | int retval; |
ecf0c772 | 393 | unsigned long flags; |
1da177e4 LT |
394 | struct zfcp_adapter *adapter = port->adapter; |
395 | ||
ecf0c772 | 396 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 397 | retval = _zfcp_erp_port_reopen(port, clear, id, ref); |
ecf0c772 | 398 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
399 | |
400 | return retval; | |
401 | } | |
402 | ||
287ac01a CS |
403 | static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask) |
404 | { | |
5ffd51a5 | 405 | zfcp_erp_modify_unit_status(unit, "erublk1", NULL, |
287ac01a CS |
406 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask, |
407 | ZFCP_CLEAR); | |
408 | } | |
409 | ||
5ffd51a5 | 410 | static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, char *id, |
287ac01a | 411 | void *ref) |
1da177e4 | 412 | { |
1da177e4 LT |
413 | struct zfcp_adapter *adapter = unit->port->adapter; |
414 | ||
287ac01a | 415 | zfcp_erp_unit_block(unit, clear); |
1da177e4 | 416 | |
287ac01a CS |
417 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) |
418 | return; | |
1da177e4 | 419 | |
287ac01a CS |
420 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT, |
421 | adapter, unit->port, unit, id, ref); | |
1da177e4 LT |
422 | } |
423 | ||
424 | /** | |
425 | * zfcp_erp_unit_reopen - initiate reopen of a unit | |
426 | * @unit: unit to be reopened | |
427 | * @clear_mask: specifies flags in unit status to be cleared | |
428 | * Return: 0 on success, < 0 on error | |
1da177e4 | 429 | */ |
5ffd51a5 SS |
430 | void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, char *id, |
431 | void *ref) | |
1da177e4 | 432 | { |
1da177e4 | 433 | unsigned long flags; |
287ac01a CS |
434 | struct zfcp_port *port = unit->port; |
435 | struct zfcp_adapter *adapter = port->adapter; | |
1da177e4 | 436 | |
ecf0c772 | 437 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 438 | _zfcp_erp_unit_reopen(unit, clear, id, ref); |
ecf0c772 | 439 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
440 | } |
441 | ||
287ac01a | 442 | static int status_change_set(unsigned long mask, atomic_t *status) |
1da177e4 | 443 | { |
287ac01a | 444 | return (atomic_read(status) ^ mask) & mask; |
1da177e4 LT |
445 | } |
446 | ||
287ac01a | 447 | static int status_change_clear(unsigned long mask, atomic_t *status) |
698ec016 | 448 | { |
287ac01a | 449 | return atomic_read(status) & mask; |
698ec016 MP |
450 | } |
451 | ||
287ac01a | 452 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) |
698ec016 | 453 | { |
287ac01a | 454 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) |
5771710b | 455 | zfcp_dbf_rec_adapter("eraubl1", NULL, adapter->dbf); |
287ac01a | 456 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); |
698ec016 MP |
457 | } |
458 | ||
287ac01a | 459 | static void zfcp_erp_port_unblock(struct zfcp_port *port) |
1da177e4 | 460 | { |
287ac01a | 461 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) |
5771710b | 462 | zfcp_dbf_rec_port("erpubl1", NULL, port); |
287ac01a | 463 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); |
1da177e4 LT |
464 | } |
465 | ||
287ac01a | 466 | static void zfcp_erp_unit_unblock(struct zfcp_unit *unit) |
1da177e4 | 467 | { |
287ac01a | 468 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status)) |
5771710b | 469 | zfcp_dbf_rec_unit("eruubl1", NULL, unit); |
287ac01a | 470 | atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status); |
1da177e4 LT |
471 | } |
472 | ||
287ac01a | 473 | static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) |
1da177e4 | 474 | { |
287ac01a | 475 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); |
5771710b | 476 | zfcp_dbf_rec_action("erator1", erp_action); |
1da177e4 LT |
477 | } |
478 | ||
287ac01a | 479 | static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act) |
1da177e4 | 480 | { |
287ac01a | 481 | struct zfcp_adapter *adapter = act->adapter; |
e60a6d69 | 482 | struct zfcp_fsf_req *req; |
1da177e4 | 483 | |
e60a6d69 | 484 | if (!act->fsf_req_id) |
287ac01a | 485 | return; |
1da177e4 | 486 | |
b6bd2fb9 CS |
487 | spin_lock(&adapter->req_list->lock); |
488 | req = _zfcp_reqlist_find(adapter->req_list, act->fsf_req_id); | |
e60a6d69 | 489 | if (req && req->erp_action == act) { |
287ac01a CS |
490 | if (act->status & (ZFCP_STATUS_ERP_DISMISSED | |
491 | ZFCP_STATUS_ERP_TIMEDOUT)) { | |
e60a6d69 | 492 | req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; |
5771710b | 493 | zfcp_dbf_rec_action("erscf_1", act); |
e60a6d69 | 494 | req->erp_action = NULL; |
1da177e4 | 495 | } |
287ac01a | 496 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
5771710b | 497 | zfcp_dbf_rec_action("erscf_2", act); |
e60a6d69 CS |
498 | if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) |
499 | act->fsf_req_id = 0; | |
287ac01a | 500 | } else |
e60a6d69 | 501 | act->fsf_req_id = 0; |
b6bd2fb9 | 502 | spin_unlock(&adapter->req_list->lock); |
1da177e4 LT |
503 | } |
504 | ||
287ac01a CS |
505 | /** |
506 | * zfcp_erp_notify - Trigger ERP action. | |
507 | * @erp_action: ERP action to continue. | |
508 | * @set_mask: ERP action status flags to set. | |
1da177e4 | 509 | */ |
287ac01a | 510 | void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask) |
1da177e4 | 511 | { |
1da177e4 | 512 | struct zfcp_adapter *adapter = erp_action->adapter; |
287ac01a | 513 | unsigned long flags; |
1da177e4 | 514 | |
287ac01a | 515 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 516 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { |
1da177e4 LT |
517 | erp_action->status |= set_mask; |
518 | zfcp_erp_action_ready(erp_action); | |
1da177e4 | 519 | } |
1da177e4 | 520 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
521 | } |
522 | ||
287ac01a CS |
523 | /** |
524 | * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request | |
525 | * @data: ERP action (from timer data) | |
1da177e4 | 526 | */ |
287ac01a | 527 | void zfcp_erp_timeout_handler(unsigned long data) |
1da177e4 | 528 | { |
287ac01a CS |
529 | struct zfcp_erp_action *act = (struct zfcp_erp_action *) data; |
530 | zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT); | |
1da177e4 LT |
531 | } |
532 | ||
287ac01a | 533 | static void zfcp_erp_memwait_handler(unsigned long data) |
1da177e4 | 534 | { |
287ac01a | 535 | zfcp_erp_notify((struct zfcp_erp_action *)data, 0); |
1da177e4 LT |
536 | } |
537 | ||
287ac01a | 538 | static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) |
1da177e4 | 539 | { |
287ac01a CS |
540 | init_timer(&erp_action->timer); |
541 | erp_action->timer.function = zfcp_erp_memwait_handler; | |
542 | erp_action->timer.data = (unsigned long) erp_action; | |
543 | erp_action->timer.expires = jiffies + HZ; | |
544 | add_timer(&erp_action->timer); | |
1da177e4 LT |
545 | } |
546 | ||
287ac01a | 547 | static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, |
5ffd51a5 | 548 | int clear, char *id, void *ref) |
1da177e4 | 549 | { |
287ac01a | 550 | struct zfcp_port *port; |
1da177e4 | 551 | |
ecf0c772 SS |
552 | read_lock(&adapter->port_list_lock); |
553 | list_for_each_entry(port, &adapter->port_list, list) | |
5ab944f9 | 554 | _zfcp_erp_port_reopen(port, clear, id, ref); |
ecf0c772 | 555 | read_unlock(&adapter->port_list_lock); |
1da177e4 LT |
556 | } |
557 | ||
5ffd51a5 SS |
558 | static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear, |
559 | char *id, void *ref) | |
1da177e4 | 560 | { |
287ac01a | 561 | struct zfcp_unit *unit; |
1da177e4 | 562 | |
ecf0c772 SS |
563 | read_lock(&port->unit_list_lock); |
564 | list_for_each_entry(unit, &port->unit_list, list) | |
287ac01a | 565 | _zfcp_erp_unit_reopen(unit, clear, id, ref); |
ecf0c772 | 566 | read_unlock(&port->unit_list_lock); |
1da177e4 LT |
567 | } |
568 | ||
85600f7f | 569 | static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act) |
1da177e4 | 570 | { |
287ac01a | 571 | switch (act->action) { |
287ac01a | 572 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
85600f7f | 573 | _zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1", NULL); |
287ac01a | 574 | break; |
287ac01a | 575 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
85600f7f | 576 | _zfcp_erp_port_forced_reopen(act->port, 0, "ersff_2", NULL); |
287ac01a | 577 | break; |
287ac01a | 578 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
85600f7f | 579 | _zfcp_erp_port_reopen(act->port, 0, "ersff_3", NULL); |
287ac01a | 580 | break; |
287ac01a | 581 | case ZFCP_ERP_ACTION_REOPEN_UNIT: |
85600f7f CS |
582 | _zfcp_erp_unit_reopen(act->unit, 0, "ersff_4", NULL); |
583 | break; | |
584 | } | |
585 | } | |
586 | ||
587 | static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act) | |
588 | { | |
589 | switch (act->action) { | |
590 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
591 | _zfcp_erp_port_reopen_all(act->adapter, 0, "ersfs_1", NULL); | |
592 | break; | |
593 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
594 | _zfcp_erp_port_reopen(act->port, 0, "ersfs_2", NULL); | |
595 | break; | |
596 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
597 | _zfcp_erp_unit_reopen_all(act->port, 0, "ersfs_3", NULL); | |
287ac01a | 598 | break; |
1da177e4 | 599 | } |
1da177e4 LT |
600 | } |
601 | ||
287ac01a | 602 | static void zfcp_erp_wakeup(struct zfcp_adapter *adapter) |
1da177e4 | 603 | { |
1da177e4 LT |
604 | unsigned long flags; |
605 | ||
ecf0c772 | 606 | read_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a CS |
607 | if (list_empty(&adapter->erp_ready_head) && |
608 | list_empty(&adapter->erp_running_head)) { | |
609 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, | |
610 | &adapter->status); | |
611 | wake_up(&adapter->erp_done_wqh); | |
1da177e4 | 612 | } |
ecf0c772 | 613 | read_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 614 | } |
1da177e4 | 615 | |
287ac01a CS |
616 | static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act) |
617 | { | |
564e1c86 SS |
618 | struct zfcp_qdio *qdio = act->adapter->qdio; |
619 | ||
620 | if (zfcp_qdio_open(qdio)) | |
287ac01a | 621 | return ZFCP_ERP_FAILED; |
564e1c86 | 622 | init_waitqueue_head(&qdio->req_q_wq); |
287ac01a CS |
623 | atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status); |
624 | return ZFCP_ERP_SUCCEEDED; | |
625 | } | |
1da177e4 | 626 | |
287ac01a CS |
627 | static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter) |
628 | { | |
629 | struct zfcp_port *port; | |
630 | port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, | |
631 | adapter->peer_d_id); | |
632 | if (IS_ERR(port)) /* error or port already attached */ | |
633 | return; | |
5ffd51a5 | 634 | _zfcp_erp_port_reopen(port, 0, "ereptp1", NULL); |
287ac01a | 635 | } |
1da177e4 | 636 | |
287ac01a CS |
637 | static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action) |
638 | { | |
639 | int retries; | |
640 | int sleep = 1; | |
641 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1da177e4 | 642 | |
287ac01a CS |
643 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); |
644 | ||
645 | for (retries = 7; retries; retries--) { | |
646 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, | |
647 | &adapter->status); | |
648 | write_lock_irq(&adapter->erp_lock); | |
649 | zfcp_erp_action_to_running(erp_action); | |
650 | write_unlock_irq(&adapter->erp_lock); | |
651 | if (zfcp_fsf_exchange_config_data(erp_action)) { | |
652 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, | |
653 | &adapter->status); | |
654 | return ZFCP_ERP_FAILED; | |
1da177e4 | 655 | } |
1da177e4 | 656 | |
5771710b | 657 | zfcp_dbf_rec_thread_lock("erasfx1", adapter->dbf); |
347c6a96 CS |
658 | wait_event(adapter->erp_ready_wq, |
659 | !list_empty(&adapter->erp_ready_head)); | |
5771710b | 660 | zfcp_dbf_rec_thread_lock("erasfx2", adapter->dbf); |
287ac01a CS |
661 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) |
662 | break; | |
1da177e4 | 663 | |
287ac01a CS |
664 | if (!(atomic_read(&adapter->status) & |
665 | ZFCP_STATUS_ADAPTER_HOST_CON_INIT)) | |
666 | break; | |
1da177e4 | 667 | |
287ac01a CS |
668 | ssleep(sleep); |
669 | sleep *= 2; | |
1da177e4 LT |
670 | } |
671 | ||
287ac01a CS |
672 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
673 | &adapter->status); | |
1da177e4 | 674 | |
287ac01a CS |
675 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK)) |
676 | return ZFCP_ERP_FAILED; | |
41fa2ada | 677 | |
287ac01a CS |
678 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) |
679 | zfcp_erp_enqueue_ptp_port(adapter); | |
1da177e4 | 680 | |
287ac01a | 681 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
682 | } |
683 | ||
287ac01a | 684 | static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act) |
1da177e4 | 685 | { |
287ac01a CS |
686 | int ret; |
687 | struct zfcp_adapter *adapter = act->adapter; | |
1da177e4 | 688 | |
287ac01a CS |
689 | write_lock_irq(&adapter->erp_lock); |
690 | zfcp_erp_action_to_running(act); | |
691 | write_unlock_irq(&adapter->erp_lock); | |
692 | ||
693 | ret = zfcp_fsf_exchange_port_data(act); | |
694 | if (ret == -EOPNOTSUPP) | |
695 | return ZFCP_ERP_SUCCEEDED; | |
696 | if (ret) | |
697 | return ZFCP_ERP_FAILED; | |
698 | ||
5771710b | 699 | zfcp_dbf_rec_thread_lock("erasox1", adapter->dbf); |
347c6a96 CS |
700 | wait_event(adapter->erp_ready_wq, |
701 | !list_empty(&adapter->erp_ready_head)); | |
5771710b | 702 | zfcp_dbf_rec_thread_lock("erasox2", adapter->dbf); |
287ac01a CS |
703 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
704 | return ZFCP_ERP_FAILED; | |
705 | ||
706 | return ZFCP_ERP_SUCCEEDED; | |
1da177e4 LT |
707 | } |
708 | ||
287ac01a | 709 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) |
1da177e4 | 710 | { |
287ac01a CS |
711 | if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED) |
712 | return ZFCP_ERP_FAILED; | |
1da177e4 | 713 | |
287ac01a CS |
714 | if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) |
715 | return ZFCP_ERP_FAILED; | |
1da177e4 | 716 | |
8d88cf3f CS |
717 | if (mempool_resize(act->adapter->pool.status_read_data, |
718 | act->adapter->stat_read_buf_num, GFP_KERNEL)) | |
719 | return ZFCP_ERP_FAILED; | |
720 | ||
721 | if (mempool_resize(act->adapter->pool.status_read_req, | |
722 | act->adapter->stat_read_buf_num, GFP_KERNEL)) | |
723 | return ZFCP_ERP_FAILED; | |
724 | ||
64deb6ef | 725 | atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num); |
287ac01a CS |
726 | if (zfcp_status_read_refill(act->adapter)) |
727 | return ZFCP_ERP_FAILED; | |
1da177e4 | 728 | |
287ac01a CS |
729 | return ZFCP_ERP_SUCCEEDED; |
730 | } | |
1da177e4 | 731 | |
cf13c082 | 732 | static void zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *act) |
287ac01a | 733 | { |
287ac01a | 734 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 735 | |
287ac01a | 736 | /* close queues to ensure that buffers are not accessed by adapter */ |
564e1c86 | 737 | zfcp_qdio_close(adapter->qdio); |
287ac01a CS |
738 | zfcp_fsf_req_dismiss_all(adapter); |
739 | adapter->fsf_req_seq_no = 0; | |
55c770fa | 740 | zfcp_fc_wka_ports_force_offline(adapter->gs); |
287ac01a | 741 | /* all ports and units are closed */ |
5ffd51a5 | 742 | zfcp_erp_modify_adapter_status(adapter, "erascl1", NULL, |
287ac01a | 743 | ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR); |
cf13c082 | 744 | |
287ac01a | 745 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
cf13c082 | 746 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); |
1da177e4 LT |
747 | } |
748 | ||
cf13c082 | 749 | static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *act) |
1da177e4 | 750 | { |
cf13c082 | 751 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 752 | |
cf13c082 SS |
753 | if (zfcp_erp_adapter_strategy_open_qdio(act)) { |
754 | atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK | | |
755 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, | |
756 | &adapter->status); | |
757 | return ZFCP_ERP_FAILED; | |
758 | } | |
287ac01a | 759 | |
cf13c082 SS |
760 | if (zfcp_erp_adapter_strategy_open_fsf(act)) { |
761 | zfcp_erp_adapter_strategy_close(act); | |
762 | return ZFCP_ERP_FAILED; | |
763 | } | |
764 | ||
765 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &adapter->status); | |
766 | ||
767 | return ZFCP_ERP_SUCCEEDED; | |
768 | } | |
287ac01a | 769 | |
cf13c082 SS |
770 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act) |
771 | { | |
772 | struct zfcp_adapter *adapter = act->adapter; | |
773 | ||
774 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN) { | |
775 | zfcp_erp_adapter_strategy_close(act); | |
776 | if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
777 | return ZFCP_ERP_EXIT; | |
778 | } | |
779 | ||
780 | if (zfcp_erp_adapter_strategy_open(act)) { | |
287ac01a | 781 | ssleep(8); |
cf13c082 SS |
782 | return ZFCP_ERP_FAILED; |
783 | } | |
1da177e4 | 784 | |
cf13c082 | 785 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
786 | } |
787 | ||
287ac01a | 788 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) |
1da177e4 | 789 | { |
287ac01a CS |
790 | int retval; |
791 | ||
792 | retval = zfcp_fsf_close_physical_port(act); | |
793 | if (retval == -ENOMEM) | |
794 | return ZFCP_ERP_NOMEM; | |
795 | act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; | |
796 | if (retval) | |
797 | return ZFCP_ERP_FAILED; | |
798 | ||
799 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
800 | } |
801 | ||
287ac01a | 802 | static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port) |
1da177e4 | 803 | { |
a5b11dda | 804 | atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status); |
287ac01a | 805 | } |
1da177e4 | 806 | |
287ac01a CS |
807 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) |
808 | { | |
809 | struct zfcp_port *port = erp_action->port; | |
810 | int status = atomic_read(&port->status); | |
811 | ||
812 | switch (erp_action->step) { | |
813 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
814 | zfcp_erp_port_strategy_clearstati(port); | |
815 | if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) && | |
816 | (status & ZFCP_STATUS_COMMON_OPEN)) | |
817 | return zfcp_erp_port_forced_strategy_close(erp_action); | |
818 | else | |
819 | return ZFCP_ERP_FAILED; | |
820 | ||
821 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
ddb3e0c1 | 822 | if (!(status & ZFCP_STATUS_PORT_PHYS_OPEN)) |
287ac01a CS |
823 | return ZFCP_ERP_SUCCEEDED; |
824 | } | |
825 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
826 | } |
827 | ||
287ac01a | 828 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) |
1da177e4 | 829 | { |
287ac01a | 830 | int retval; |
1da177e4 | 831 | |
287ac01a CS |
832 | retval = zfcp_fsf_close_port(erp_action); |
833 | if (retval == -ENOMEM) | |
834 | return ZFCP_ERP_NOMEM; | |
835 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; | |
836 | if (retval) | |
837 | return ZFCP_ERP_FAILED; | |
838 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
839 | } |
840 | ||
287ac01a | 841 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) |
1da177e4 | 842 | { |
287ac01a | 843 | int retval; |
1da177e4 | 844 | |
287ac01a CS |
845 | retval = zfcp_fsf_open_port(erp_action); |
846 | if (retval == -ENOMEM) | |
847 | return ZFCP_ERP_NOMEM; | |
848 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; | |
849 | if (retval) | |
850 | return ZFCP_ERP_FAILED; | |
851 | return ZFCP_ERP_CONTINUES; | |
852 | } | |
1da177e4 | 853 | |
287ac01a | 854 | static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act) |
1da177e4 | 855 | { |
287ac01a CS |
856 | struct zfcp_adapter *adapter = act->adapter; |
857 | struct zfcp_port *port = act->port; | |
1da177e4 | 858 | |
287ac01a | 859 | if (port->wwpn != adapter->peer_wwpn) { |
5ffd51a5 | 860 | zfcp_erp_port_failed(port, "eroptp1", NULL); |
287ac01a CS |
861 | return ZFCP_ERP_FAILED; |
862 | } | |
863 | port->d_id = adapter->peer_d_id; | |
287ac01a CS |
864 | return zfcp_erp_port_strategy_open_port(act); |
865 | } | |
866 | ||
867 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) | |
868 | { | |
869 | struct zfcp_adapter *adapter = act->adapter; | |
870 | struct zfcp_port *port = act->port; | |
287ac01a CS |
871 | int p_status = atomic_read(&port->status); |
872 | ||
873 | switch (act->step) { | |
874 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
875 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
876 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
877 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) | |
878 | return zfcp_erp_open_ptp_port(act); | |
b98478d7 | 879 | if (!port->d_id) { |
934aeb58 | 880 | zfcp_fc_trigger_did_lookup(port); |
799b76d0 | 881 | return ZFCP_ERP_EXIT; |
287ac01a | 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 | 887 | if (p_status & ZFCP_STATUS_COMMON_OPEN) { |
934aeb58 CS |
888 | if (!port->d_id) { |
889 | zfcp_fc_trigger_did_lookup(port); | |
890 | return ZFCP_ERP_EXIT; | |
5ab944f9 | 891 | } |
934aeb58 | 892 | return ZFCP_ERP_SUCCEEDED; |
5ab944f9 | 893 | } |
ea460a81 SS |
894 | if (port->d_id && !(p_status & ZFCP_STATUS_COMMON_NOESC)) { |
895 | port->d_id = 0; | |
896 | _zfcp_erp_port_reopen(port, 0, "erpsoc1", NULL); | |
897 | return ZFCP_ERP_EXIT; | |
898 | } | |
899 | /* fall through otherwise */ | |
287ac01a CS |
900 | } |
901 | return ZFCP_ERP_FAILED; | |
902 | } | |
903 | ||
287ac01a CS |
904 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) |
905 | { | |
906 | struct zfcp_port *port = erp_action->port; | |
934aeb58 | 907 | int p_status = atomic_read(&port->status); |
287ac01a | 908 | |
934aeb58 CS |
909 | if ((p_status & ZFCP_STATUS_COMMON_NOESC) && |
910 | !(p_status & ZFCP_STATUS_COMMON_OPEN)) | |
5ab944f9 SS |
911 | goto close_init_done; |
912 | ||
287ac01a CS |
913 | switch (erp_action->step) { |
914 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
915 | zfcp_erp_port_strategy_clearstati(port); | |
934aeb58 | 916 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 917 | return zfcp_erp_port_strategy_close(erp_action); |
1da177e4 LT |
918 | break; |
919 | ||
287ac01a | 920 | case ZFCP_ERP_STEP_PORT_CLOSING: |
934aeb58 | 921 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 922 | return ZFCP_ERP_FAILED; |
1da177e4 LT |
923 | break; |
924 | } | |
5ab944f9 SS |
925 | |
926 | close_init_done: | |
287ac01a CS |
927 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
928 | return ZFCP_ERP_EXIT; | |
1da177e4 | 929 | |
5ab944f9 | 930 | return zfcp_erp_port_strategy_open_common(erp_action); |
287ac01a CS |
931 | } |
932 | ||
933 | static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit) | |
934 | { | |
44cc76f2 | 935 | atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | |
287ac01a CS |
936 | ZFCP_STATUS_UNIT_SHARED | |
937 | ZFCP_STATUS_UNIT_READONLY, | |
938 | &unit->status); | |
939 | } | |
940 | ||
941 | static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action) | |
942 | { | |
943 | int retval = zfcp_fsf_close_unit(erp_action); | |
944 | if (retval == -ENOMEM) | |
945 | return ZFCP_ERP_NOMEM; | |
946 | erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING; | |
947 | if (retval) | |
948 | return ZFCP_ERP_FAILED; | |
949 | return ZFCP_ERP_CONTINUES; | |
950 | } | |
951 | ||
952 | static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action) | |
953 | { | |
954 | int retval = zfcp_fsf_open_unit(erp_action); | |
955 | if (retval == -ENOMEM) | |
956 | return ZFCP_ERP_NOMEM; | |
957 | erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING; | |
958 | if (retval) | |
959 | return ZFCP_ERP_FAILED; | |
960 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
961 | } |
962 | ||
287ac01a | 963 | static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 | 964 | { |
287ac01a CS |
965 | struct zfcp_unit *unit = erp_action->unit; |
966 | ||
967 | switch (erp_action->step) { | |
968 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
969 | zfcp_erp_unit_strategy_clearstati(unit); | |
970 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) | |
971 | return zfcp_erp_unit_strategy_close(erp_action); | |
972 | /* already closed, fall through */ | |
973 | case ZFCP_ERP_STEP_UNIT_CLOSING: | |
974 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) | |
975 | return ZFCP_ERP_FAILED; | |
976 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
977 | return ZFCP_ERP_EXIT; | |
978 | return zfcp_erp_unit_strategy_open(erp_action); | |
979 | ||
980 | case ZFCP_ERP_STEP_UNIT_OPENING: | |
981 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN) | |
982 | return ZFCP_ERP_SUCCEEDED; | |
983 | } | |
984 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
985 | } |
986 | ||
287ac01a | 987 | static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result) |
1da177e4 | 988 | { |
1da177e4 LT |
989 | switch (result) { |
990 | case ZFCP_ERP_SUCCEEDED : | |
991 | atomic_set(&unit->erp_counter, 0); | |
992 | zfcp_erp_unit_unblock(unit); | |
993 | break; | |
994 | case ZFCP_ERP_FAILED : | |
995 | atomic_inc(&unit->erp_counter); | |
ff3b24fa CS |
996 | if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS) { |
997 | dev_err(&unit->port->adapter->ccw_device->dev, | |
998 | "ERP failed for unit 0x%016Lx on " | |
999 | "port 0x%016Lx\n", | |
7ba58c9c SS |
1000 | (unsigned long long)unit->fcp_lun, |
1001 | (unsigned long long)unit->port->wwpn); | |
5ffd51a5 | 1002 | zfcp_erp_unit_failed(unit, "erusck1", NULL); |
ff3b24fa | 1003 | } |
1da177e4 | 1004 | break; |
1da177e4 LT |
1005 | } |
1006 | ||
287ac01a CS |
1007 | if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1008 | zfcp_erp_unit_block(unit, 0); | |
1da177e4 LT |
1009 | result = ZFCP_ERP_EXIT; |
1010 | } | |
1da177e4 LT |
1011 | return result; |
1012 | } | |
1013 | ||
287ac01a | 1014 | static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) |
1da177e4 | 1015 | { |
1da177e4 LT |
1016 | switch (result) { |
1017 | case ZFCP_ERP_SUCCEEDED : | |
1018 | atomic_set(&port->erp_counter, 0); | |
1019 | zfcp_erp_port_unblock(port); | |
1020 | break; | |
287ac01a | 1021 | |
1da177e4 | 1022 | case ZFCP_ERP_FAILED : |
287ac01a | 1023 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) { |
cc8c2829 SS |
1024 | zfcp_erp_port_block(port, 0); |
1025 | result = ZFCP_ERP_EXIT; | |
1026 | } | |
1da177e4 | 1027 | atomic_inc(&port->erp_counter); |
ff3b24fa CS |
1028 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) { |
1029 | dev_err(&port->adapter->ccw_device->dev, | |
1030 | "ERP failed for remote port 0x%016Lx\n", | |
7ba58c9c | 1031 | (unsigned long long)port->wwpn); |
5ffd51a5 | 1032 | zfcp_erp_port_failed(port, "erpsck1", NULL); |
ff3b24fa | 1033 | } |
1da177e4 | 1034 | break; |
1da177e4 LT |
1035 | } |
1036 | ||
287ac01a CS |
1037 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1038 | zfcp_erp_port_block(port, 0); | |
1da177e4 LT |
1039 | result = ZFCP_ERP_EXIT; |
1040 | } | |
1da177e4 LT |
1041 | return result; |
1042 | } | |
1043 | ||
287ac01a CS |
1044 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, |
1045 | int result) | |
1da177e4 | 1046 | { |
1da177e4 LT |
1047 | switch (result) { |
1048 | case ZFCP_ERP_SUCCEEDED : | |
1049 | atomic_set(&adapter->erp_counter, 0); | |
1050 | zfcp_erp_adapter_unblock(adapter); | |
1051 | break; | |
287ac01a | 1052 | |
1da177e4 LT |
1053 | case ZFCP_ERP_FAILED : |
1054 | atomic_inc(&adapter->erp_counter); | |
ff3b24fa CS |
1055 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) { |
1056 | dev_err(&adapter->ccw_device->dev, | |
1057 | "ERP cannot recover an error " | |
1058 | "on the FCP device\n"); | |
5ffd51a5 | 1059 | zfcp_erp_adapter_failed(adapter, "erasck1", NULL); |
ff3b24fa | 1060 | } |
1da177e4 | 1061 | break; |
1da177e4 LT |
1062 | } |
1063 | ||
287ac01a CS |
1064 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1065 | zfcp_erp_adapter_block(adapter, 0); | |
1da177e4 LT |
1066 | result = ZFCP_ERP_EXIT; |
1067 | } | |
1da177e4 LT |
1068 | return result; |
1069 | } | |
1070 | ||
287ac01a CS |
1071 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, |
1072 | int result) | |
5f852be9 | 1073 | { |
287ac01a CS |
1074 | struct zfcp_adapter *adapter = erp_action->adapter; |
1075 | struct zfcp_port *port = erp_action->port; | |
1076 | struct zfcp_unit *unit = erp_action->unit; | |
1077 | ||
1078 | switch (erp_action->action) { | |
1079 | ||
1080 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1081 | result = zfcp_erp_strategy_check_unit(unit, result); | |
1082 | break; | |
1083 | ||
1084 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1085 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1086 | result = zfcp_erp_strategy_check_port(port, result); | |
1087 | break; | |
1088 | ||
1089 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1090 | result = zfcp_erp_strategy_check_adapter(adapter, result); | |
1091 | break; | |
1092 | } | |
1093 | return result; | |
5f852be9 CS |
1094 | } |
1095 | ||
287ac01a | 1096 | static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status) |
5f852be9 | 1097 | { |
287ac01a | 1098 | int status = atomic_read(target_status); |
5f852be9 | 1099 | |
287ac01a CS |
1100 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && |
1101 | (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1102 | return 1; /* take it online */ | |
5f852be9 | 1103 | |
287ac01a CS |
1104 | if (!(status & ZFCP_STATUS_COMMON_RUNNING) && |
1105 | !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1106 | return 1; /* take it offline */ | |
1107 | ||
1108 | return 0; | |
5f852be9 CS |
1109 | } |
1110 | ||
287ac01a | 1111 | static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret) |
1da177e4 | 1112 | { |
287ac01a CS |
1113 | int action = act->action; |
1114 | struct zfcp_adapter *adapter = act->adapter; | |
1115 | struct zfcp_port *port = act->port; | |
1116 | struct zfcp_unit *unit = act->unit; | |
1117 | u32 erp_status = act->status; | |
1da177e4 | 1118 | |
287ac01a | 1119 | switch (action) { |
1da177e4 | 1120 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
287ac01a CS |
1121 | if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) { |
1122 | _zfcp_erp_adapter_reopen(adapter, | |
1123 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
5ffd51a5 | 1124 | "ersscg1", NULL); |
287ac01a CS |
1125 | return ZFCP_ERP_EXIT; |
1126 | } | |
1da177e4 LT |
1127 | break; |
1128 | ||
1129 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1da177e4 | 1130 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
287ac01a CS |
1131 | if (zfcp_erp_strat_change_det(&port->status, erp_status)) { |
1132 | _zfcp_erp_port_reopen(port, | |
1133 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
5ffd51a5 | 1134 | "ersscg2", NULL); |
287ac01a CS |
1135 | return ZFCP_ERP_EXIT; |
1136 | } | |
1da177e4 LT |
1137 | break; |
1138 | ||
1139 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
287ac01a CS |
1140 | if (zfcp_erp_strat_change_det(&unit->status, erp_status)) { |
1141 | _zfcp_erp_unit_reopen(unit, | |
1142 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
5ffd51a5 | 1143 | "ersscg3", NULL); |
287ac01a CS |
1144 | return ZFCP_ERP_EXIT; |
1145 | } | |
1da177e4 LT |
1146 | break; |
1147 | } | |
287ac01a | 1148 | return ret; |
1da177e4 LT |
1149 | } |
1150 | ||
287ac01a | 1151 | static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) |
1da177e4 | 1152 | { |
287ac01a | 1153 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1154 | |
287ac01a CS |
1155 | adapter->erp_total_count--; |
1156 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1157 | adapter->erp_low_mem_count--; | |
1158 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
507e4969 | 1159 | } |
1da177e4 | 1160 | |
287ac01a | 1161 | list_del(&erp_action->list); |
5771710b | 1162 | zfcp_dbf_rec_action("eractd1", erp_action); |
1da177e4 | 1163 | |
287ac01a CS |
1164 | switch (erp_action->action) { |
1165 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1166 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
1167 | &erp_action->unit->status); | |
1168 | break; | |
1da177e4 | 1169 | |
287ac01a CS |
1170 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
1171 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1172 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
1173 | &erp_action->port->status); | |
1174 | break; | |
1da177e4 | 1175 | |
287ac01a CS |
1176 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
1177 | atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE, | |
1178 | &erp_action->adapter->status); | |
1179 | break; | |
1180 | } | |
1da177e4 LT |
1181 | } |
1182 | ||
287ac01a | 1183 | static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) |
1da177e4 | 1184 | { |
287ac01a CS |
1185 | struct zfcp_adapter *adapter = act->adapter; |
1186 | struct zfcp_port *port = act->port; | |
1187 | struct zfcp_unit *unit = act->unit; | |
1da177e4 | 1188 | |
287ac01a CS |
1189 | switch (act->action) { |
1190 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
a2fa0aed | 1191 | if ((result == ZFCP_ERP_SUCCEEDED) && !unit->device) { |
615f59e0 | 1192 | get_device(&unit->dev); |
92d5193b SS |
1193 | if (scsi_queue_work(unit->port->adapter->scsi_host, |
1194 | &unit->scsi_work) <= 0) | |
615f59e0 | 1195 | put_device(&unit->dev); |
287ac01a | 1196 | } |
615f59e0 | 1197 | put_device(&unit->dev); |
287ac01a | 1198 | break; |
1da177e4 | 1199 | |
287ac01a CS |
1200 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
1201 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
a2fa0aed CS |
1202 | if (result == ZFCP_ERP_SUCCEEDED) |
1203 | zfcp_scsi_schedule_rport_register(port); | |
615f59e0 | 1204 | put_device(&port->dev); |
287ac01a CS |
1205 | break; |
1206 | ||
1207 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
a2fa0aed | 1208 | if (result == ZFCP_ERP_SUCCEEDED) { |
bd43a42b | 1209 | register_service_level(&adapter->service_level); |
9eae07ef | 1210 | queue_work(adapter->work_queue, &adapter->scan_work); |
a2fa0aed CS |
1211 | } else |
1212 | unregister_service_level(&adapter->service_level); | |
f3450c7b | 1213 | kref_put(&adapter->ref, zfcp_adapter_release); |
287ac01a CS |
1214 | break; |
1215 | } | |
1da177e4 LT |
1216 | } |
1217 | ||
287ac01a | 1218 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
1da177e4 | 1219 | { |
287ac01a CS |
1220 | switch (erp_action->action) { |
1221 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1222 | return zfcp_erp_adapter_strategy(erp_action); | |
1223 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1224 | return zfcp_erp_port_forced_strategy(erp_action); | |
1225 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1226 | return zfcp_erp_port_strategy(erp_action); | |
1227 | case ZFCP_ERP_ACTION_REOPEN_UNIT: | |
1228 | return zfcp_erp_unit_strategy(erp_action); | |
1229 | } | |
1230 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1231 | } |
1232 | ||
287ac01a | 1233 | static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 LT |
1234 | { |
1235 | int retval; | |
287ac01a | 1236 | unsigned long flags; |
ecf0c772 | 1237 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1238 | |
f3450c7b | 1239 | kref_get(&adapter->ref); |
1da177e4 | 1240 | |
f3450c7b | 1241 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 1242 | zfcp_erp_strategy_check_fsfreq(erp_action); |
1da177e4 | 1243 | |
287ac01a CS |
1244 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
1245 | zfcp_erp_action_dequeue(erp_action); | |
1246 | retval = ZFCP_ERP_DISMISSED; | |
1247 | goto unlock; | |
22753fa5 | 1248 | } |
1da177e4 | 1249 | |
2f8f3ed5 | 1250 | zfcp_erp_action_to_running(erp_action); |
1da177e4 | 1251 | |
287ac01a | 1252 | /* no lock to allow for blocking operations */ |
ecf0c772 | 1253 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 1254 | retval = zfcp_erp_strategy_do_action(erp_action); |
ecf0c772 | 1255 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 1256 | |
287ac01a CS |
1257 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) |
1258 | retval = ZFCP_ERP_CONTINUES; | |
cc8c2829 | 1259 | |
287ac01a CS |
1260 | switch (retval) { |
1261 | case ZFCP_ERP_NOMEM: | |
1262 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { | |
1263 | ++adapter->erp_low_mem_count; | |
1264 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1265 | } |
287ac01a | 1266 | if (adapter->erp_total_count == adapter->erp_low_mem_count) |
5ffd51a5 | 1267 | _zfcp_erp_adapter_reopen(adapter, 0, "erstgy1", NULL); |
287ac01a CS |
1268 | else { |
1269 | zfcp_erp_strategy_memwait(erp_action); | |
1270 | retval = ZFCP_ERP_CONTINUES; | |
1da177e4 | 1271 | } |
287ac01a | 1272 | goto unlock; |
1da177e4 | 1273 | |
287ac01a CS |
1274 | case ZFCP_ERP_CONTINUES: |
1275 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1276 | --adapter->erp_low_mem_count; | |
1277 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1278 | } |
287ac01a | 1279 | goto unlock; |
1da177e4 LT |
1280 | } |
1281 | ||
287ac01a CS |
1282 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
1283 | zfcp_erp_action_dequeue(erp_action); | |
1284 | retval = zfcp_erp_strategy_statechange(erp_action, retval); | |
1285 | if (retval == ZFCP_ERP_EXIT) | |
1286 | goto unlock; | |
85600f7f CS |
1287 | if (retval == ZFCP_ERP_SUCCEEDED) |
1288 | zfcp_erp_strategy_followup_success(erp_action); | |
1289 | if (retval == ZFCP_ERP_FAILED) | |
1290 | zfcp_erp_strategy_followup_failed(erp_action); | |
1da177e4 | 1291 | |
287ac01a | 1292 | unlock: |
ecf0c772 | 1293 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 | 1294 | |
287ac01a CS |
1295 | if (retval != ZFCP_ERP_CONTINUES) |
1296 | zfcp_erp_action_cleanup(erp_action, retval); | |
1da177e4 | 1297 | |
f3450c7b | 1298 | kref_put(&adapter->ref, zfcp_adapter_release); |
1da177e4 LT |
1299 | return retval; |
1300 | } | |
1301 | ||
287ac01a | 1302 | static int zfcp_erp_thread(void *data) |
1da177e4 | 1303 | { |
287ac01a CS |
1304 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
1305 | struct list_head *next; | |
1306 | struct zfcp_erp_action *act; | |
1307 | unsigned long flags; | |
94ab4b38 | 1308 | |
347c6a96 | 1309 | for (;;) { |
5771710b | 1310 | zfcp_dbf_rec_thread_lock("erthrd1", adapter->dbf); |
347c6a96 CS |
1311 | wait_event_interruptible(adapter->erp_ready_wq, |
1312 | !list_empty(&adapter->erp_ready_head) || | |
1313 | kthread_should_stop()); | |
5771710b | 1314 | zfcp_dbf_rec_thread_lock("erthrd2", adapter->dbf); |
94ab4b38 | 1315 | |
347c6a96 CS |
1316 | if (kthread_should_stop()) |
1317 | break; | |
1318 | ||
287ac01a CS |
1319 | write_lock_irqsave(&adapter->erp_lock, flags); |
1320 | next = adapter->erp_ready_head.next; | |
1321 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1da177e4 | 1322 | |
287ac01a CS |
1323 | if (next != &adapter->erp_ready_head) { |
1324 | act = list_entry(next, struct zfcp_erp_action, list); | |
1da177e4 | 1325 | |
287ac01a CS |
1326 | /* there is more to come after dismission, no notify */ |
1327 | if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) | |
1328 | zfcp_erp_wakeup(adapter); | |
1da177e4 | 1329 | } |
1da177e4 LT |
1330 | } |
1331 | ||
287ac01a CS |
1332 | return 0; |
1333 | } | |
1da177e4 | 1334 | |
287ac01a CS |
1335 | /** |
1336 | * zfcp_erp_thread_setup - Start ERP thread for adapter | |
1337 | * @adapter: Adapter to start the ERP thread for | |
1338 | * | |
1339 | * Returns 0 on success or error code from kernel_thread() | |
1340 | */ | |
1341 | int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) | |
1342 | { | |
347c6a96 | 1343 | struct task_struct *thread; |
1da177e4 | 1344 | |
347c6a96 CS |
1345 | thread = kthread_run(zfcp_erp_thread, adapter, "zfcperp%s", |
1346 | dev_name(&adapter->ccw_device->dev)); | |
1347 | if (IS_ERR(thread)) { | |
287ac01a | 1348 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa | 1349 | "Creating an ERP thread for the FCP device failed.\n"); |
347c6a96 | 1350 | return PTR_ERR(thread); |
1da177e4 | 1351 | } |
347c6a96 CS |
1352 | |
1353 | adapter->erp_thread = thread; | |
287ac01a CS |
1354 | return 0; |
1355 | } | |
1da177e4 | 1356 | |
287ac01a CS |
1357 | /** |
1358 | * zfcp_erp_thread_kill - Stop ERP thread. | |
1359 | * @adapter: Adapter where the ERP thread should be stopped. | |
1360 | * | |
1361 | * The caller of this routine ensures that the specified adapter has | |
1362 | * been shut down and that this operation has been completed. Thus, | |
1363 | * there are no pending erp_actions which would need to be handled | |
1364 | * here. | |
1365 | */ | |
1366 | void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) | |
1367 | { | |
347c6a96 CS |
1368 | kthread_stop(adapter->erp_thread); |
1369 | adapter->erp_thread = NULL; | |
143bb6bf CS |
1370 | WARN_ON(!list_empty(&adapter->erp_ready_head)); |
1371 | WARN_ON(!list_empty(&adapter->erp_running_head)); | |
1da177e4 LT |
1372 | } |
1373 | ||
287ac01a CS |
1374 | /** |
1375 | * zfcp_erp_adapter_failed - Set adapter status to failed. | |
1376 | * @adapter: Failed adapter. | |
1377 | * @id: Event id for debug trace. | |
1378 | * @ref: Reference for debug trace. | |
1379 | */ | |
5ffd51a5 | 1380 | void zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, char *id, void *ref) |
1da177e4 | 1381 | { |
287ac01a CS |
1382 | zfcp_erp_modify_adapter_status(adapter, id, ref, |
1383 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
287ac01a | 1384 | } |
1da177e4 | 1385 | |
287ac01a CS |
1386 | /** |
1387 | * zfcp_erp_port_failed - Set port status to failed. | |
1388 | * @port: Failed port. | |
1389 | * @id: Event id for debug trace. | |
1390 | * @ref: Reference for debug trace. | |
1391 | */ | |
5ffd51a5 | 1392 | void zfcp_erp_port_failed(struct zfcp_port *port, char *id, void *ref) |
287ac01a CS |
1393 | { |
1394 | zfcp_erp_modify_port_status(port, id, ref, | |
1395 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
1da177e4 LT |
1396 | } |
1397 | ||
1398 | /** | |
287ac01a CS |
1399 | * zfcp_erp_unit_failed - Set unit status to failed. |
1400 | * @unit: Failed unit. | |
1401 | * @id: Event id for debug trace. | |
1402 | * @ref: Reference for debug trace. | |
1da177e4 | 1403 | */ |
5ffd51a5 | 1404 | void zfcp_erp_unit_failed(struct zfcp_unit *unit, char *id, void *ref) |
1da177e4 | 1405 | { |
287ac01a CS |
1406 | zfcp_erp_modify_unit_status(unit, id, ref, |
1407 | ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET); | |
1da177e4 LT |
1408 | } |
1409 | ||
287ac01a CS |
1410 | /** |
1411 | * zfcp_erp_wait - wait for completion of error recovery on an adapter | |
1412 | * @adapter: adapter for which to wait for completion of its error recovery | |
1413 | */ | |
1414 | void zfcp_erp_wait(struct zfcp_adapter *adapter) | |
1415 | { | |
1416 | wait_event(adapter->erp_done_wqh, | |
1417 | !(atomic_read(&adapter->status) & | |
1418 | ZFCP_STATUS_ADAPTER_ERP_PENDING)); | |
1419 | } | |
1da177e4 | 1420 | |
287ac01a CS |
1421 | /** |
1422 | * zfcp_erp_modify_adapter_status - change adapter status bits | |
1423 | * @adapter: adapter to change the status | |
1424 | * @id: id for the debug trace | |
1425 | * @ref: reference for the debug trace | |
1426 | * @mask: status bits to change | |
1427 | * @set_or_clear: ZFCP_SET or ZFCP_CLEAR | |
1428 | * | |
1429 | * Changes in common status bits are propagated to attached ports and units. | |
1430 | */ | |
5ffd51a5 | 1431 | void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, char *id, |
287ac01a | 1432 | void *ref, u32 mask, int set_or_clear) |
1da177e4 | 1433 | { |
1da177e4 | 1434 | struct zfcp_port *port; |
ecf0c772 | 1435 | unsigned long flags; |
287ac01a | 1436 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
1da177e4 | 1437 | |
287ac01a CS |
1438 | if (set_or_clear == ZFCP_SET) { |
1439 | if (status_change_set(mask, &adapter->status)) | |
5771710b | 1440 | zfcp_dbf_rec_adapter(id, ref, adapter->dbf); |
287ac01a CS |
1441 | atomic_set_mask(mask, &adapter->status); |
1442 | } else { | |
1443 | if (status_change_clear(mask, &adapter->status)) | |
5771710b | 1444 | zfcp_dbf_rec_adapter(id, ref, adapter->dbf); |
287ac01a CS |
1445 | atomic_clear_mask(mask, &adapter->status); |
1446 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1447 | atomic_set(&adapter->erp_counter, 0); | |
1448 | } | |
1449 | ||
ecf0c772 SS |
1450 | if (common_mask) { |
1451 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1452 | list_for_each_entry(port, &adapter->port_list, list) | |
287ac01a CS |
1453 | zfcp_erp_modify_port_status(port, id, ref, common_mask, |
1454 | set_or_clear); | |
ecf0c772 SS |
1455 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
1456 | } | |
1da177e4 LT |
1457 | } |
1458 | ||
287ac01a CS |
1459 | /** |
1460 | * zfcp_erp_modify_port_status - change port status bits | |
1461 | * @port: port to change the status bits | |
1462 | * @id: id for the debug trace | |
1463 | * @ref: reference for the debug trace | |
1464 | * @mask: status bits to change | |
1465 | * @set_or_clear: ZFCP_SET or ZFCP_CLEAR | |
1466 | * | |
1467 | * Changes in common status bits are propagated to attached units. | |
1468 | */ | |
5ffd51a5 | 1469 | void zfcp_erp_modify_port_status(struct zfcp_port *port, char *id, void *ref, |
287ac01a | 1470 | u32 mask, int set_or_clear) |
1da177e4 | 1471 | { |
1da177e4 | 1472 | struct zfcp_unit *unit; |
ecf0c772 | 1473 | unsigned long flags; |
287ac01a | 1474 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
1da177e4 | 1475 | |
287ac01a CS |
1476 | if (set_or_clear == ZFCP_SET) { |
1477 | if (status_change_set(mask, &port->status)) | |
5771710b | 1478 | zfcp_dbf_rec_port(id, ref, port); |
287ac01a CS |
1479 | atomic_set_mask(mask, &port->status); |
1480 | } else { | |
1481 | if (status_change_clear(mask, &port->status)) | |
5771710b | 1482 | zfcp_dbf_rec_port(id, ref, port); |
287ac01a CS |
1483 | atomic_clear_mask(mask, &port->status); |
1484 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1485 | atomic_set(&port->erp_counter, 0); | |
1486 | } | |
1da177e4 | 1487 | |
ecf0c772 SS |
1488 | if (common_mask) { |
1489 | read_lock_irqsave(&port->unit_list_lock, flags); | |
1490 | list_for_each_entry(unit, &port->unit_list, list) | |
287ac01a CS |
1491 | zfcp_erp_modify_unit_status(unit, id, ref, common_mask, |
1492 | set_or_clear); | |
ecf0c772 SS |
1493 | read_unlock_irqrestore(&port->unit_list_lock, flags); |
1494 | } | |
1da177e4 LT |
1495 | } |
1496 | ||
287ac01a CS |
1497 | /** |
1498 | * zfcp_erp_modify_unit_status - change unit status bits | |
1499 | * @unit: unit to change the status bits | |
1500 | * @id: id for the debug trace | |
1501 | * @ref: reference for the debug trace | |
1502 | * @mask: status bits to change | |
1503 | * @set_or_clear: ZFCP_SET or ZFCP_CLEAR | |
1504 | */ | |
5ffd51a5 | 1505 | void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, char *id, void *ref, |
287ac01a | 1506 | u32 mask, int set_or_clear) |
1da177e4 | 1507 | { |
287ac01a CS |
1508 | if (set_or_clear == ZFCP_SET) { |
1509 | if (status_change_set(mask, &unit->status)) | |
5771710b | 1510 | zfcp_dbf_rec_unit(id, ref, unit); |
287ac01a CS |
1511 | atomic_set_mask(mask, &unit->status); |
1512 | } else { | |
1513 | if (status_change_clear(mask, &unit->status)) | |
5771710b | 1514 | zfcp_dbf_rec_unit(id, ref, unit); |
287ac01a CS |
1515 | atomic_clear_mask(mask, &unit->status); |
1516 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
1517 | atomic_set(&unit->erp_counter, 0); | |
1518 | } | |
1519 | } | |
1da177e4 LT |
1520 | } |
1521 | ||
287ac01a CS |
1522 | /** |
1523 | * zfcp_erp_port_boxed - Mark port as "boxed" and start ERP | |
1524 | * @port: The "boxed" port. | |
1525 | * @id: The debug trace id. | |
1526 | * @id: Reference for the debug trace. | |
1527 | */ | |
5ffd51a5 | 1528 | void zfcp_erp_port_boxed(struct zfcp_port *port, char *id, void *ref) |
d736a27b | 1529 | { |
698ec016 MP |
1530 | zfcp_erp_modify_port_status(port, id, ref, |
1531 | ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET); | |
9467a9b3 | 1532 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
d736a27b AH |
1533 | } |
1534 | ||
287ac01a CS |
1535 | /** |
1536 | * zfcp_erp_unit_boxed - Mark unit as "boxed" and start ERP | |
1537 | * @port: The "boxed" unit. | |
1538 | * @id: The debug trace id. | |
1539 | * @id: Reference for the debug trace. | |
1540 | */ | |
5ffd51a5 | 1541 | void zfcp_erp_unit_boxed(struct zfcp_unit *unit, char *id, void *ref) |
d736a27b | 1542 | { |
698ec016 MP |
1543 | zfcp_erp_modify_unit_status(unit, id, ref, |
1544 | ZFCP_STATUS_COMMON_ACCESS_BOXED, ZFCP_SET); | |
9467a9b3 | 1545 | zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
d736a27b AH |
1546 | } |
1547 | ||
287ac01a CS |
1548 | /** |
1549 | * zfcp_erp_port_access_denied - Adapter denied access to port. | |
1550 | * @port: port where access has been denied | |
1551 | * @id: id for debug trace | |
1552 | * @ref: reference for debug trace | |
1553 | * | |
1554 | * Since the adapter has denied access, stop using the port and the | |
1555 | * attached units. | |
1556 | */ | |
5ffd51a5 | 1557 | void zfcp_erp_port_access_denied(struct zfcp_port *port, char *id, void *ref) |
1da177e4 | 1558 | { |
698ec016 MP |
1559 | zfcp_erp_modify_port_status(port, id, ref, |
1560 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
1561 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); | |
1da177e4 LT |
1562 | } |
1563 | ||
287ac01a CS |
1564 | /** |
1565 | * zfcp_erp_unit_access_denied - Adapter denied access to unit. | |
1566 | * @unit: unit where access has been denied | |
1567 | * @id: id for debug trace | |
1568 | * @ref: reference for debug trace | |
1569 | * | |
1570 | * Since the adapter has denied access, stop using the unit. | |
1571 | */ | |
5ffd51a5 | 1572 | void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, char *id, void *ref) |
1da177e4 | 1573 | { |
698ec016 MP |
1574 | zfcp_erp_modify_unit_status(unit, id, ref, |
1575 | ZFCP_STATUS_COMMON_ERP_FAILED | | |
1576 | ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET); | |
1da177e4 LT |
1577 | } |
1578 | ||
5ffd51a5 | 1579 | static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, char *id, |
287ac01a | 1580 | void *ref) |
1da177e4 | 1581 | { |
287ac01a CS |
1582 | int status = atomic_read(&unit->status); |
1583 | if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | | |
1584 | ZFCP_STATUS_COMMON_ACCESS_BOXED))) | |
aef4a983 MS |
1585 | return; |
1586 | ||
287ac01a | 1587 | zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
1da177e4 LT |
1588 | } |
1589 | ||
5ffd51a5 | 1590 | static void zfcp_erp_port_access_changed(struct zfcp_port *port, char *id, |
287ac01a | 1591 | void *ref) |
1da177e4 | 1592 | { |
1da177e4 | 1593 | struct zfcp_unit *unit; |
ecf0c772 | 1594 | unsigned long flags; |
287ac01a | 1595 | int status = atomic_read(&port->status); |
1da177e4 | 1596 | |
287ac01a CS |
1597 | if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED | |
1598 | ZFCP_STATUS_COMMON_ACCESS_BOXED))) { | |
ecf0c772 SS |
1599 | read_lock_irqsave(&port->unit_list_lock, flags); |
1600 | list_for_each_entry(unit, &port->unit_list, list) | |
5ab944f9 | 1601 | zfcp_erp_unit_access_changed(unit, id, ref); |
ecf0c772 | 1602 | read_unlock_irqrestore(&port->unit_list_lock, flags); |
1da177e4 LT |
1603 | return; |
1604 | } | |
1605 | ||
553448f6 | 1606 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref); |
1da177e4 LT |
1607 | } |
1608 | ||
287ac01a CS |
1609 | /** |
1610 | * zfcp_erp_adapter_access_changed - Process change in adapter ACT | |
1611 | * @adapter: Adapter where the Access Control Table (ACT) changed | |
1612 | * @id: Id for debug trace | |
1613 | * @ref: Reference for debug trace | |
1614 | */ | |
5ffd51a5 | 1615 | void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, char *id, |
287ac01a | 1616 | void *ref) |
1da177e4 | 1617 | { |
287ac01a | 1618 | unsigned long flags; |
ecf0c772 | 1619 | struct zfcp_port *port; |
287ac01a CS |
1620 | |
1621 | if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) | |
1da177e4 LT |
1622 | return; |
1623 | ||
ecf0c772 SS |
1624 | read_lock_irqsave(&adapter->port_list_lock, flags); |
1625 | list_for_each_entry(port, &adapter->port_list, list) | |
5ab944f9 | 1626 | zfcp_erp_port_access_changed(port, id, ref); |
ecf0c772 | 1627 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
1da177e4 | 1628 | } |