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Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Error Recovery Procedures (ERP). |
41fa2ada | 5 | * |
a53c8fab | 6 | * Copyright IBM Corp. 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, | |
fdbd1c5e | 24 | ZFCP_STATUS_ERP_NO_REF = 0x00800000, |
287ac01a | 25 | }; |
1da177e4 | 26 | |
287ac01a CS |
27 | enum zfcp_erp_steps { |
28 | ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, | |
29 | ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001, | |
30 | ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, | |
31 | ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, | |
287ac01a | 32 | ZFCP_ERP_STEP_PORT_OPENING = 0x0800, |
b62a8d9b CS |
33 | ZFCP_ERP_STEP_LUN_CLOSING = 0x1000, |
34 | ZFCP_ERP_STEP_LUN_OPENING = 0x2000, | |
287ac01a CS |
35 | }; |
36 | ||
37 | enum zfcp_erp_act_type { | |
b62a8d9b | 38 | ZFCP_ERP_ACTION_REOPEN_LUN = 1, |
287ac01a CS |
39 | ZFCP_ERP_ACTION_REOPEN_PORT = 2, |
40 | ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, | |
41 | ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4, | |
42 | }; | |
43 | ||
44 | enum zfcp_erp_act_state { | |
45 | ZFCP_ERP_ACTION_RUNNING = 1, | |
46 | ZFCP_ERP_ACTION_READY = 2, | |
47 | }; | |
48 | ||
49 | enum zfcp_erp_act_result { | |
50 | ZFCP_ERP_SUCCEEDED = 0, | |
51 | ZFCP_ERP_FAILED = 1, | |
52 | ZFCP_ERP_CONTINUES = 2, | |
53 | ZFCP_ERP_EXIT = 3, | |
54 | ZFCP_ERP_DISMISSED = 4, | |
55 | ZFCP_ERP_NOMEM = 5, | |
56 | }; | |
57 | ||
58 | static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask) | |
1da177e4 | 59 | { |
edaed859 SS |
60 | zfcp_erp_clear_adapter_status(adapter, |
61 | ZFCP_STATUS_COMMON_UNBLOCKED | mask); | |
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); | |
ae0904f6 | 79 | zfcp_dbf_rec_run("erardy1", act); |
347c6a96 | 80 | wake_up(&adapter->erp_ready_wq); |
ae0904f6 | 81 | zfcp_dbf_rec_run("erardy2", act); |
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 | |
b62a8d9b | 91 | static void zfcp_erp_action_dismiss_lun(struct scsi_device *sdev) |
287ac01a | 92 | { |
b62a8d9b CS |
93 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
94 | ||
95 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_INUSE) | |
96 | zfcp_erp_action_dismiss(&zfcp_sdev->erp_action); | |
287ac01a | 97 | } |
1da177e4 | 98 | |
287ac01a CS |
99 | static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) |
100 | { | |
b62a8d9b | 101 | struct scsi_device *sdev; |
1da177e4 | 102 | |
287ac01a CS |
103 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
104 | zfcp_erp_action_dismiss(&port->erp_action); | |
924dd584 MP |
105 | else { |
106 | spin_lock(port->adapter->scsi_host->host_lock); | |
107 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
b62a8d9b CS |
108 | if (sdev_to_zfcp(sdev)->port == port) |
109 | zfcp_erp_action_dismiss_lun(sdev); | |
924dd584 MP |
110 | spin_unlock(port->adapter->scsi_host->host_lock); |
111 | } | |
1da177e4 LT |
112 | } |
113 | ||
287ac01a | 114 | static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) |
1da177e4 | 115 | { |
287ac01a | 116 | struct zfcp_port *port; |
1da177e4 | 117 | |
287ac01a CS |
118 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
119 | zfcp_erp_action_dismiss(&adapter->erp_action); | |
ecf0c772 SS |
120 | else { |
121 | read_lock(&adapter->port_list_lock); | |
122 | list_for_each_entry(port, &adapter->port_list, list) | |
287ac01a | 123 | zfcp_erp_action_dismiss_port(port); |
ecf0c772 SS |
124 | read_unlock(&adapter->port_list_lock); |
125 | } | |
1da177e4 LT |
126 | } |
127 | ||
287ac01a CS |
128 | static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter, |
129 | struct zfcp_port *port, | |
b62a8d9b | 130 | struct scsi_device *sdev) |
1da177e4 | 131 | { |
287ac01a | 132 | int need = want; |
b62a8d9b CS |
133 | int l_status, p_status, a_status; |
134 | struct zfcp_scsi_dev *zfcp_sdev; | |
1da177e4 | 135 | |
287ac01a | 136 | switch (want) { |
b62a8d9b CS |
137 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
138 | zfcp_sdev = sdev_to_zfcp(sdev); | |
139 | l_status = atomic_read(&zfcp_sdev->status); | |
140 | if (l_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
287ac01a CS |
141 | return 0; |
142 | p_status = atomic_read(&port->status); | |
143 | if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) || | |
144 | p_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
145 | return 0; | |
146 | if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED)) | |
147 | need = ZFCP_ERP_ACTION_REOPEN_PORT; | |
148 | /* fall through */ | |
287ac01a | 149 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
097ef3bd CS |
150 | p_status = atomic_read(&port->status); |
151 | if (!(p_status & ZFCP_STATUS_COMMON_OPEN)) | |
152 | need = ZFCP_ERP_ACTION_REOPEN_PORT; | |
153 | /* fall through */ | |
154 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
287ac01a CS |
155 | p_status = atomic_read(&port->status); |
156 | if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
157 | return 0; | |
158 | a_status = atomic_read(&adapter->status); | |
159 | if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) || | |
160 | a_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
161 | return 0; | |
d3e1088d SS |
162 | if (p_status & ZFCP_STATUS_COMMON_NOESC) |
163 | return need; | |
287ac01a CS |
164 | if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED)) |
165 | need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; | |
166 | /* fall through */ | |
167 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
168 | a_status = atomic_read(&adapter->status); | |
169 | if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
170 | return 0; | |
143bb6bf CS |
171 | if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) && |
172 | !(a_status & ZFCP_STATUS_COMMON_OPEN)) | |
173 | return 0; /* shutdown requested for closed adapter */ | |
287ac01a | 174 | } |
1da177e4 | 175 | |
287ac01a | 176 | return need; |
1da177e4 LT |
177 | } |
178 | ||
fdbd1c5e | 179 | static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status, |
287ac01a CS |
180 | struct zfcp_adapter *adapter, |
181 | struct zfcp_port *port, | |
b62a8d9b | 182 | struct scsi_device *sdev) |
1da177e4 | 183 | { |
287ac01a | 184 | struct zfcp_erp_action *erp_action; |
b62a8d9b | 185 | struct zfcp_scsi_dev *zfcp_sdev; |
1da177e4 | 186 | |
287ac01a | 187 | switch (need) { |
b62a8d9b CS |
188 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
189 | zfcp_sdev = sdev_to_zfcp(sdev); | |
fdbd1c5e | 190 | if (!(act_status & ZFCP_STATUS_ERP_NO_REF)) |
b62a8d9b | 191 | if (scsi_device_get(sdev)) |
fdbd1c5e | 192 | return NULL; |
805de8f4 | 193 | atomic_or(ZFCP_STATUS_COMMON_ERP_INUSE, |
b62a8d9b CS |
194 | &zfcp_sdev->status); |
195 | erp_action = &zfcp_sdev->erp_action; | |
14718e3c SS |
196 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
197 | erp_action->port = port; | |
198 | erp_action->sdev = sdev; | |
b62a8d9b CS |
199 | if (!(atomic_read(&zfcp_sdev->status) & |
200 | ZFCP_STATUS_COMMON_RUNNING)) | |
fdbd1c5e | 201 | act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY; |
287ac01a | 202 | break; |
1da177e4 | 203 | |
287ac01a CS |
204 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
205 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
615f59e0 | 206 | if (!get_device(&port->dev)) |
6b183334 | 207 | return NULL; |
287ac01a | 208 | zfcp_erp_action_dismiss_port(port); |
805de8f4 | 209 | atomic_or(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); |
287ac01a | 210 | erp_action = &port->erp_action; |
14718e3c SS |
211 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
212 | erp_action->port = port; | |
287ac01a | 213 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING)) |
fdbd1c5e | 214 | act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY; |
287ac01a | 215 | break; |
1da177e4 | 216 | |
287ac01a | 217 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
f3450c7b | 218 | kref_get(&adapter->ref); |
287ac01a | 219 | zfcp_erp_action_dismiss_adapter(adapter); |
805de8f4 | 220 | atomic_or(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); |
287ac01a | 221 | erp_action = &adapter->erp_action; |
14718e3c | 222 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
287ac01a CS |
223 | if (!(atomic_read(&adapter->status) & |
224 | ZFCP_STATUS_COMMON_RUNNING)) | |
fdbd1c5e | 225 | act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY; |
287ac01a CS |
226 | break; |
227 | ||
228 | default: | |
229 | return NULL; | |
230 | } | |
1da177e4 | 231 | |
287ac01a | 232 | erp_action->adapter = adapter; |
287ac01a | 233 | erp_action->action = need; |
fdbd1c5e | 234 | erp_action->status = act_status; |
1da177e4 | 235 | |
287ac01a | 236 | return erp_action; |
1da177e4 LT |
237 | } |
238 | ||
287ac01a CS |
239 | static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, |
240 | struct zfcp_port *port, | |
b62a8d9b | 241 | struct scsi_device *sdev, |
ea4a3a6a | 242 | char *id, u32 act_status) |
1da177e4 | 243 | { |
287ac01a | 244 | int retval = 1, need; |
ae0904f6 | 245 | struct zfcp_erp_action *act; |
1da177e4 | 246 | |
347c6a96 | 247 | if (!adapter->erp_thread) |
287ac01a | 248 | return -EIO; |
1da177e4 | 249 | |
b62a8d9b | 250 | need = zfcp_erp_required_act(want, adapter, port, sdev); |
287ac01a | 251 | if (!need) |
1da177e4 | 252 | goto out; |
1da177e4 | 253 | |
b62a8d9b | 254 | act = zfcp_erp_setup_act(need, act_status, adapter, port, sdev); |
287ac01a CS |
255 | if (!act) |
256 | goto out; | |
805de8f4 | 257 | atomic_or(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); |
287ac01a CS |
258 | ++adapter->erp_total_count; |
259 | list_add_tail(&act->list, &adapter->erp_ready_head); | |
347c6a96 | 260 | wake_up(&adapter->erp_ready_wq); |
287ac01a | 261 | retval = 0; |
1da177e4 | 262 | out: |
ae0904f6 | 263 | zfcp_dbf_rec_trig(id, adapter, port, sdev, want, need); |
1da177e4 LT |
264 | return retval; |
265 | } | |
266 | ||
287ac01a | 267 | static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, |
ea4a3a6a | 268 | int clear_mask, char *id) |
287ac01a CS |
269 | { |
270 | zfcp_erp_adapter_block(adapter, clear_mask); | |
a2fa0aed | 271 | zfcp_scsi_schedule_rports_block(adapter); |
287ac01a CS |
272 | |
273 | /* ensure propagation of failed status to new devices */ | |
274 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
edaed859 SS |
275 | zfcp_erp_set_adapter_status(adapter, |
276 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
287ac01a CS |
277 | return -EIO; |
278 | } | |
279 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, | |
ea4a3a6a | 280 | adapter, NULL, NULL, id, 0); |
287ac01a CS |
281 | } |
282 | ||
283 | /** | |
284 | * zfcp_erp_adapter_reopen - Reopen adapter. | |
285 | * @adapter: Adapter to reopen. | |
286 | * @clear: Status flags to clear. | |
287 | * @id: Id for debug trace event. | |
1da177e4 | 288 | */ |
ea4a3a6a | 289 | void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, char *id) |
1da177e4 | 290 | { |
1da177e4 | 291 | unsigned long flags; |
1da177e4 | 292 | |
ecf0c772 SS |
293 | zfcp_erp_adapter_block(adapter, clear); |
294 | zfcp_scsi_schedule_rports_block(adapter); | |
295 | ||
296 | write_lock_irqsave(&adapter->erp_lock, flags); | |
297 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
edaed859 SS |
298 | zfcp_erp_set_adapter_status(adapter, |
299 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ecf0c772 SS |
300 | else |
301 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, adapter, | |
ea4a3a6a | 302 | NULL, NULL, id, 0); |
ecf0c772 | 303 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 304 | } |
1da177e4 | 305 | |
287ac01a CS |
306 | /** |
307 | * zfcp_erp_adapter_shutdown - Shutdown adapter. | |
308 | * @adapter: Adapter to shut down. | |
309 | * @clear: Status flags to clear. | |
310 | * @id: Id for debug trace event. | |
287ac01a CS |
311 | */ |
312 | void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear, | |
ea4a3a6a | 313 | char *id) |
287ac01a CS |
314 | { |
315 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
ea4a3a6a | 316 | zfcp_erp_adapter_reopen(adapter, clear | flags, id); |
1da177e4 LT |
317 | } |
318 | ||
287ac01a CS |
319 | /** |
320 | * zfcp_erp_port_shutdown - Shutdown port | |
321 | * @port: Port to shut down. | |
322 | * @clear: Status flags to clear. | |
323 | * @id: Id for debug trace event. | |
1da177e4 | 324 | */ |
ea4a3a6a | 325 | void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *id) |
1da177e4 | 326 | { |
287ac01a | 327 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; |
ea4a3a6a | 328 | zfcp_erp_port_reopen(port, clear | flags, id); |
287ac01a CS |
329 | } |
330 | ||
287ac01a CS |
331 | static void zfcp_erp_port_block(struct zfcp_port *port, int clear) |
332 | { | |
edaed859 SS |
333 | zfcp_erp_clear_port_status(port, |
334 | ZFCP_STATUS_COMMON_UNBLOCKED | clear); | |
287ac01a CS |
335 | } |
336 | ||
ea4a3a6a SS |
337 | static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, |
338 | char *id) | |
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 | 346 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, |
ea4a3a6a | 347 | port->adapter, port, NULL, id, 0); |
287ac01a CS |
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. | |
ea4a3a6a | 353 | * @clear: Status flags to clear. |
287ac01a | 354 | * @id: Id for debug trace event. |
287ac01a | 355 | */ |
ea4a3a6a | 356 | void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, char *id) |
287ac01a CS |
357 | { |
358 | unsigned long flags; | |
359 | struct zfcp_adapter *adapter = port->adapter; | |
360 | ||
ecf0c772 | 361 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 362 | _zfcp_erp_port_forced_reopen(port, clear, id); |
ecf0c772 | 363 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a CS |
364 | } |
365 | ||
ea4a3a6a | 366 | static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id) |
287ac01a CS |
367 | { |
368 | zfcp_erp_port_block(port, clear); | |
a2fa0aed | 369 | zfcp_scsi_schedule_rport_block(port); |
1da177e4 | 370 | |
287ac01a | 371 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1da177e4 | 372 | /* ensure propagation of failed status to new devices */ |
edaed859 | 373 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
287ac01a | 374 | return -EIO; |
1da177e4 LT |
375 | } |
376 | ||
287ac01a | 377 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, |
ea4a3a6a | 378 | port->adapter, port, NULL, id, 0); |
1da177e4 LT |
379 | } |
380 | ||
381 | /** | |
287ac01a CS |
382 | * zfcp_erp_port_reopen - trigger remote port recovery |
383 | * @port: port to recover | |
384 | * @clear_mask: flags in port status to be cleared | |
ea4a3a6a | 385 | * @id: Id for debug trace event. |
1da177e4 | 386 | * |
287ac01a | 387 | * Returns 0 if recovery has been triggered, < 0 if not. |
1da177e4 | 388 | */ |
ea4a3a6a | 389 | int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id) |
1da177e4 | 390 | { |
287ac01a | 391 | int retval; |
ecf0c772 | 392 | unsigned long flags; |
1da177e4 LT |
393 | struct zfcp_adapter *adapter = port->adapter; |
394 | ||
ecf0c772 | 395 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 396 | retval = _zfcp_erp_port_reopen(port, clear, id); |
ecf0c772 | 397 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
398 | |
399 | return retval; | |
400 | } | |
401 | ||
b62a8d9b | 402 | static void zfcp_erp_lun_block(struct scsi_device *sdev, int clear_mask) |
287ac01a | 403 | { |
edaed859 SS |
404 | zfcp_erp_clear_lun_status(sdev, |
405 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask); | |
287ac01a CS |
406 | } |
407 | ||
b62a8d9b | 408 | static void _zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id, |
ea4a3a6a | 409 | u32 act_status) |
1da177e4 | 410 | { |
b62a8d9b CS |
411 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
412 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
1da177e4 | 413 | |
b62a8d9b | 414 | zfcp_erp_lun_block(sdev, clear); |
1da177e4 | 415 | |
b62a8d9b | 416 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_FAILED) |
287ac01a | 417 | return; |
1da177e4 | 418 | |
b62a8d9b | 419 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_LUN, adapter, |
ea4a3a6a | 420 | zfcp_sdev->port, sdev, id, act_status); |
1da177e4 LT |
421 | } |
422 | ||
423 | /** | |
b62a8d9b CS |
424 | * zfcp_erp_lun_reopen - initiate reopen of a LUN |
425 | * @sdev: SCSI device / LUN to be reopened | |
426 | * @clear_mask: specifies flags in LUN status to be cleared | |
ea4a3a6a SS |
427 | * @id: Id for debug trace event. |
428 | * | |
1da177e4 | 429 | * Return: 0 on success, < 0 on error |
1da177e4 | 430 | */ |
ea4a3a6a | 431 | void zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id) |
1da177e4 | 432 | { |
1da177e4 | 433 | unsigned long flags; |
b62a8d9b CS |
434 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
435 | struct zfcp_port *port = zfcp_sdev->port; | |
287ac01a | 436 | struct zfcp_adapter *adapter = port->adapter; |
1da177e4 | 437 | |
ecf0c772 | 438 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 439 | _zfcp_erp_lun_reopen(sdev, clear, id, 0); |
fdbd1c5e CS |
440 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
441 | } | |
442 | ||
443 | /** | |
b62a8d9b CS |
444 | * zfcp_erp_lun_shutdown - Shutdown LUN |
445 | * @sdev: SCSI device / LUN to shut down. | |
fdbd1c5e CS |
446 | * @clear: Status flags to clear. |
447 | * @id: Id for debug trace event. | |
fdbd1c5e | 448 | */ |
ea4a3a6a | 449 | void zfcp_erp_lun_shutdown(struct scsi_device *sdev, int clear, char *id) |
fdbd1c5e CS |
450 | { |
451 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
ea4a3a6a | 452 | zfcp_erp_lun_reopen(sdev, clear | flags, id); |
fdbd1c5e CS |
453 | } |
454 | ||
455 | /** | |
b62a8d9b CS |
456 | * zfcp_erp_lun_shutdown_wait - Shutdown LUN and wait for erp completion |
457 | * @sdev: SCSI device / LUN to shut down. | |
fdbd1c5e CS |
458 | * @id: Id for debug trace event. |
459 | * | |
b62a8d9b | 460 | * Do not acquire a reference for the LUN when creating the ERP |
fdbd1c5e | 461 | * action. It is safe, because this function waits for the ERP to |
b62a8d9b CS |
462 | * complete first. This allows to shutdown the LUN, even when the SCSI |
463 | * device is in the state SDEV_DEL when scsi_device_get will fail. | |
fdbd1c5e | 464 | */ |
b62a8d9b | 465 | void zfcp_erp_lun_shutdown_wait(struct scsi_device *sdev, char *id) |
fdbd1c5e CS |
466 | { |
467 | unsigned long flags; | |
b62a8d9b CS |
468 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
469 | struct zfcp_port *port = zfcp_sdev->port; | |
fdbd1c5e CS |
470 | struct zfcp_adapter *adapter = port->adapter; |
471 | int clear = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
472 | ||
473 | write_lock_irqsave(&adapter->erp_lock, flags); | |
ea4a3a6a | 474 | _zfcp_erp_lun_reopen(sdev, clear, id, ZFCP_STATUS_ERP_NO_REF); |
ecf0c772 | 475 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
fdbd1c5e CS |
476 | |
477 | zfcp_erp_wait(adapter); | |
1da177e4 LT |
478 | } |
479 | ||
287ac01a | 480 | static int status_change_set(unsigned long mask, atomic_t *status) |
1da177e4 | 481 | { |
287ac01a | 482 | return (atomic_read(status) ^ mask) & mask; |
1da177e4 LT |
483 | } |
484 | ||
287ac01a | 485 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) |
698ec016 | 486 | { |
287ac01a | 487 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) |
ae0904f6 | 488 | zfcp_dbf_rec_run("eraubl1", &adapter->erp_action); |
805de8f4 | 489 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); |
698ec016 MP |
490 | } |
491 | ||
287ac01a | 492 | static void zfcp_erp_port_unblock(struct zfcp_port *port) |
1da177e4 | 493 | { |
287ac01a | 494 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) |
ae0904f6 | 495 | zfcp_dbf_rec_run("erpubl1", &port->erp_action); |
805de8f4 | 496 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); |
1da177e4 LT |
497 | } |
498 | ||
b62a8d9b | 499 | static void zfcp_erp_lun_unblock(struct scsi_device *sdev) |
1da177e4 | 500 | { |
b62a8d9b CS |
501 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
502 | ||
503 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &zfcp_sdev->status)) | |
ae0904f6 | 504 | zfcp_dbf_rec_run("erlubl1", &sdev_to_zfcp(sdev)->erp_action); |
805de8f4 | 505 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &zfcp_sdev->status); |
1da177e4 LT |
506 | } |
507 | ||
287ac01a | 508 | static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) |
1da177e4 | 509 | { |
287ac01a | 510 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); |
ae0904f6 | 511 | zfcp_dbf_rec_run("erator1", erp_action); |
1da177e4 LT |
512 | } |
513 | ||
287ac01a | 514 | static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act) |
1da177e4 | 515 | { |
287ac01a | 516 | struct zfcp_adapter *adapter = act->adapter; |
e60a6d69 | 517 | struct zfcp_fsf_req *req; |
1da177e4 | 518 | |
e60a6d69 | 519 | if (!act->fsf_req_id) |
287ac01a | 520 | return; |
1da177e4 | 521 | |
b6bd2fb9 CS |
522 | spin_lock(&adapter->req_list->lock); |
523 | req = _zfcp_reqlist_find(adapter->req_list, act->fsf_req_id); | |
e60a6d69 | 524 | if (req && req->erp_action == act) { |
287ac01a CS |
525 | if (act->status & (ZFCP_STATUS_ERP_DISMISSED | |
526 | ZFCP_STATUS_ERP_TIMEDOUT)) { | |
e60a6d69 | 527 | req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; |
ae0904f6 | 528 | zfcp_dbf_rec_run("erscf_1", act); |
e60a6d69 | 529 | req->erp_action = NULL; |
1da177e4 | 530 | } |
287ac01a | 531 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
ae0904f6 | 532 | zfcp_dbf_rec_run("erscf_2", act); |
e60a6d69 CS |
533 | if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) |
534 | act->fsf_req_id = 0; | |
287ac01a | 535 | } else |
e60a6d69 | 536 | act->fsf_req_id = 0; |
b6bd2fb9 | 537 | spin_unlock(&adapter->req_list->lock); |
1da177e4 LT |
538 | } |
539 | ||
287ac01a CS |
540 | /** |
541 | * zfcp_erp_notify - Trigger ERP action. | |
542 | * @erp_action: ERP action to continue. | |
543 | * @set_mask: ERP action status flags to set. | |
1da177e4 | 544 | */ |
287ac01a | 545 | void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask) |
1da177e4 | 546 | { |
1da177e4 | 547 | struct zfcp_adapter *adapter = erp_action->adapter; |
287ac01a | 548 | unsigned long flags; |
1da177e4 | 549 | |
287ac01a | 550 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 551 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { |
1da177e4 LT |
552 | erp_action->status |= set_mask; |
553 | zfcp_erp_action_ready(erp_action); | |
1da177e4 | 554 | } |
1da177e4 | 555 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
556 | } |
557 | ||
287ac01a CS |
558 | /** |
559 | * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request | |
560 | * @data: ERP action (from timer data) | |
1da177e4 | 561 | */ |
287ac01a | 562 | void zfcp_erp_timeout_handler(unsigned long data) |
1da177e4 | 563 | { |
287ac01a CS |
564 | struct zfcp_erp_action *act = (struct zfcp_erp_action *) data; |
565 | zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT); | |
1da177e4 LT |
566 | } |
567 | ||
287ac01a | 568 | static void zfcp_erp_memwait_handler(unsigned long data) |
1da177e4 | 569 | { |
287ac01a | 570 | zfcp_erp_notify((struct zfcp_erp_action *)data, 0); |
1da177e4 LT |
571 | } |
572 | ||
287ac01a | 573 | static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) |
1da177e4 | 574 | { |
287ac01a CS |
575 | init_timer(&erp_action->timer); |
576 | erp_action->timer.function = zfcp_erp_memwait_handler; | |
577 | erp_action->timer.data = (unsigned long) erp_action; | |
578 | erp_action->timer.expires = jiffies + HZ; | |
579 | add_timer(&erp_action->timer); | |
1da177e4 LT |
580 | } |
581 | ||
287ac01a | 582 | static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, |
ea4a3a6a | 583 | int clear, char *id) |
1da177e4 | 584 | { |
287ac01a | 585 | struct zfcp_port *port; |
1da177e4 | 586 | |
ecf0c772 SS |
587 | read_lock(&adapter->port_list_lock); |
588 | list_for_each_entry(port, &adapter->port_list, list) | |
ea4a3a6a | 589 | _zfcp_erp_port_reopen(port, clear, id); |
ecf0c772 | 590 | read_unlock(&adapter->port_list_lock); |
1da177e4 LT |
591 | } |
592 | ||
b62a8d9b | 593 | static void _zfcp_erp_lun_reopen_all(struct zfcp_port *port, int clear, |
ea4a3a6a | 594 | char *id) |
1da177e4 | 595 | { |
b62a8d9b | 596 | struct scsi_device *sdev; |
1da177e4 | 597 | |
924dd584 MP |
598 | spin_lock(port->adapter->scsi_host->host_lock); |
599 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
b62a8d9b | 600 | if (sdev_to_zfcp(sdev)->port == port) |
ea4a3a6a | 601 | _zfcp_erp_lun_reopen(sdev, clear, id, 0); |
924dd584 | 602 | spin_unlock(port->adapter->scsi_host->host_lock); |
1da177e4 LT |
603 | } |
604 | ||
85600f7f | 605 | static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act) |
1da177e4 | 606 | { |
287ac01a | 607 | switch (act->action) { |
287ac01a | 608 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
ea4a3a6a | 609 | _zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1"); |
287ac01a | 610 | break; |
287ac01a | 611 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
ea4a3a6a | 612 | _zfcp_erp_port_forced_reopen(act->port, 0, "ersff_2"); |
287ac01a | 613 | break; |
287ac01a | 614 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
ea4a3a6a | 615 | _zfcp_erp_port_reopen(act->port, 0, "ersff_3"); |
287ac01a | 616 | break; |
b62a8d9b | 617 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
ea4a3a6a | 618 | _zfcp_erp_lun_reopen(act->sdev, 0, "ersff_4", 0); |
85600f7f CS |
619 | break; |
620 | } | |
621 | } | |
622 | ||
623 | static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act) | |
624 | { | |
625 | switch (act->action) { | |
626 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
ea4a3a6a | 627 | _zfcp_erp_port_reopen_all(act->adapter, 0, "ersfs_1"); |
85600f7f CS |
628 | break; |
629 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
ea4a3a6a | 630 | _zfcp_erp_port_reopen(act->port, 0, "ersfs_2"); |
85600f7f CS |
631 | break; |
632 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
ea4a3a6a | 633 | _zfcp_erp_lun_reopen_all(act->port, 0, "ersfs_3"); |
287ac01a | 634 | break; |
1da177e4 | 635 | } |
1da177e4 LT |
636 | } |
637 | ||
287ac01a | 638 | static void zfcp_erp_wakeup(struct zfcp_adapter *adapter) |
1da177e4 | 639 | { |
1da177e4 LT |
640 | unsigned long flags; |
641 | ||
ecf0c772 | 642 | read_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a CS |
643 | if (list_empty(&adapter->erp_ready_head) && |
644 | list_empty(&adapter->erp_running_head)) { | |
805de8f4 | 645 | atomic_andnot(ZFCP_STATUS_ADAPTER_ERP_PENDING, |
287ac01a CS |
646 | &adapter->status); |
647 | wake_up(&adapter->erp_done_wqh); | |
1da177e4 | 648 | } |
ecf0c772 | 649 | read_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 650 | } |
1da177e4 | 651 | |
287ac01a CS |
652 | static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter) |
653 | { | |
654 | struct zfcp_port *port; | |
655 | port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, | |
656 | adapter->peer_d_id); | |
657 | if (IS_ERR(port)) /* error or port already attached */ | |
658 | return; | |
ea4a3a6a | 659 | _zfcp_erp_port_reopen(port, 0, "ereptp1"); |
287ac01a | 660 | } |
1da177e4 | 661 | |
287ac01a CS |
662 | static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action) |
663 | { | |
664 | int retries; | |
665 | int sleep = 1; | |
666 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1da177e4 | 667 | |
805de8f4 | 668 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); |
287ac01a CS |
669 | |
670 | for (retries = 7; retries; retries--) { | |
805de8f4 | 671 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a CS |
672 | &adapter->status); |
673 | write_lock_irq(&adapter->erp_lock); | |
674 | zfcp_erp_action_to_running(erp_action); | |
675 | write_unlock_irq(&adapter->erp_lock); | |
676 | if (zfcp_fsf_exchange_config_data(erp_action)) { | |
805de8f4 | 677 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a CS |
678 | &adapter->status); |
679 | return ZFCP_ERP_FAILED; | |
1da177e4 | 680 | } |
1da177e4 | 681 | |
347c6a96 CS |
682 | wait_event(adapter->erp_ready_wq, |
683 | !list_empty(&adapter->erp_ready_head)); | |
287ac01a CS |
684 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) |
685 | break; | |
1da177e4 | 686 | |
287ac01a CS |
687 | if (!(atomic_read(&adapter->status) & |
688 | ZFCP_STATUS_ADAPTER_HOST_CON_INIT)) | |
689 | break; | |
1da177e4 | 690 | |
287ac01a CS |
691 | ssleep(sleep); |
692 | sleep *= 2; | |
1da177e4 LT |
693 | } |
694 | ||
805de8f4 | 695 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a | 696 | &adapter->status); |
1da177e4 | 697 | |
287ac01a CS |
698 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK)) |
699 | return ZFCP_ERP_FAILED; | |
41fa2ada | 700 | |
287ac01a CS |
701 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) |
702 | zfcp_erp_enqueue_ptp_port(adapter); | |
1da177e4 | 703 | |
287ac01a | 704 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
705 | } |
706 | ||
287ac01a | 707 | static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act) |
1da177e4 | 708 | { |
287ac01a CS |
709 | int ret; |
710 | struct zfcp_adapter *adapter = act->adapter; | |
1da177e4 | 711 | |
287ac01a CS |
712 | write_lock_irq(&adapter->erp_lock); |
713 | zfcp_erp_action_to_running(act); | |
714 | write_unlock_irq(&adapter->erp_lock); | |
715 | ||
716 | ret = zfcp_fsf_exchange_port_data(act); | |
717 | if (ret == -EOPNOTSUPP) | |
718 | return ZFCP_ERP_SUCCEEDED; | |
719 | if (ret) | |
720 | return ZFCP_ERP_FAILED; | |
721 | ||
ae0904f6 | 722 | zfcp_dbf_rec_run("erasox1", act); |
347c6a96 CS |
723 | wait_event(adapter->erp_ready_wq, |
724 | !list_empty(&adapter->erp_ready_head)); | |
ae0904f6 | 725 | zfcp_dbf_rec_run("erasox2", act); |
287ac01a CS |
726 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
727 | return ZFCP_ERP_FAILED; | |
728 | ||
729 | return ZFCP_ERP_SUCCEEDED; | |
1da177e4 LT |
730 | } |
731 | ||
287ac01a | 732 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) |
1da177e4 | 733 | { |
287ac01a CS |
734 | if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED) |
735 | return ZFCP_ERP_FAILED; | |
1da177e4 | 736 | |
287ac01a CS |
737 | if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) |
738 | return ZFCP_ERP_FAILED; | |
1da177e4 | 739 | |
c7b279ae | 740 | if (mempool_resize(act->adapter->pool.sr_data, |
11d83360 | 741 | act->adapter->stat_read_buf_num)) |
8d88cf3f CS |
742 | return ZFCP_ERP_FAILED; |
743 | ||
744 | if (mempool_resize(act->adapter->pool.status_read_req, | |
11d83360 | 745 | act->adapter->stat_read_buf_num)) |
8d88cf3f CS |
746 | return ZFCP_ERP_FAILED; |
747 | ||
64deb6ef | 748 | atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num); |
287ac01a CS |
749 | if (zfcp_status_read_refill(act->adapter)) |
750 | return ZFCP_ERP_FAILED; | |
1da177e4 | 751 | |
287ac01a CS |
752 | return ZFCP_ERP_SUCCEEDED; |
753 | } | |
1da177e4 | 754 | |
cf13c082 | 755 | static void zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *act) |
287ac01a | 756 | { |
287ac01a | 757 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 758 | |
287ac01a | 759 | /* close queues to ensure that buffers are not accessed by adapter */ |
564e1c86 | 760 | zfcp_qdio_close(adapter->qdio); |
287ac01a CS |
761 | zfcp_fsf_req_dismiss_all(adapter); |
762 | adapter->fsf_req_seq_no = 0; | |
55c770fa | 763 | zfcp_fc_wka_ports_force_offline(adapter->gs); |
b62a8d9b | 764 | /* all ports and LUNs are closed */ |
edaed859 | 765 | zfcp_erp_clear_adapter_status(adapter, ZFCP_STATUS_COMMON_OPEN); |
cf13c082 | 766 | |
805de8f4 | 767 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
cf13c082 | 768 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); |
1da177e4 LT |
769 | } |
770 | ||
cf13c082 | 771 | static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *act) |
1da177e4 | 772 | { |
cf13c082 | 773 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 774 | |
3d63d3b4 | 775 | if (zfcp_qdio_open(adapter->qdio)) { |
805de8f4 | 776 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
cf13c082 SS |
777 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, |
778 | &adapter->status); | |
779 | return ZFCP_ERP_FAILED; | |
780 | } | |
287ac01a | 781 | |
cf13c082 SS |
782 | if (zfcp_erp_adapter_strategy_open_fsf(act)) { |
783 | zfcp_erp_adapter_strategy_close(act); | |
784 | return ZFCP_ERP_FAILED; | |
785 | } | |
786 | ||
805de8f4 | 787 | atomic_or(ZFCP_STATUS_COMMON_OPEN, &adapter->status); |
cf13c082 SS |
788 | |
789 | return ZFCP_ERP_SUCCEEDED; | |
790 | } | |
287ac01a | 791 | |
cf13c082 SS |
792 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act) |
793 | { | |
794 | struct zfcp_adapter *adapter = act->adapter; | |
795 | ||
796 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN) { | |
797 | zfcp_erp_adapter_strategy_close(act); | |
798 | if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
799 | return ZFCP_ERP_EXIT; | |
800 | } | |
801 | ||
802 | if (zfcp_erp_adapter_strategy_open(act)) { | |
287ac01a | 803 | ssleep(8); |
cf13c082 SS |
804 | return ZFCP_ERP_FAILED; |
805 | } | |
1da177e4 | 806 | |
cf13c082 | 807 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
808 | } |
809 | ||
287ac01a | 810 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) |
1da177e4 | 811 | { |
287ac01a CS |
812 | int retval; |
813 | ||
814 | retval = zfcp_fsf_close_physical_port(act); | |
815 | if (retval == -ENOMEM) | |
816 | return ZFCP_ERP_NOMEM; | |
817 | act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; | |
818 | if (retval) | |
819 | return ZFCP_ERP_FAILED; | |
820 | ||
821 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
822 | } |
823 | ||
287ac01a CS |
824 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) |
825 | { | |
826 | struct zfcp_port *port = erp_action->port; | |
827 | int status = atomic_read(&port->status); | |
828 | ||
829 | switch (erp_action->step) { | |
830 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
287ac01a CS |
831 | if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) && |
832 | (status & ZFCP_STATUS_COMMON_OPEN)) | |
833 | return zfcp_erp_port_forced_strategy_close(erp_action); | |
834 | else | |
835 | return ZFCP_ERP_FAILED; | |
836 | ||
837 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
ddb3e0c1 | 838 | if (!(status & ZFCP_STATUS_PORT_PHYS_OPEN)) |
287ac01a CS |
839 | return ZFCP_ERP_SUCCEEDED; |
840 | } | |
841 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
842 | } |
843 | ||
287ac01a | 844 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) |
1da177e4 | 845 | { |
287ac01a | 846 | int retval; |
1da177e4 | 847 | |
287ac01a CS |
848 | retval = zfcp_fsf_close_port(erp_action); |
849 | if (retval == -ENOMEM) | |
850 | return ZFCP_ERP_NOMEM; | |
851 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; | |
852 | if (retval) | |
853 | return ZFCP_ERP_FAILED; | |
854 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
855 | } |
856 | ||
287ac01a | 857 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) |
1da177e4 | 858 | { |
287ac01a | 859 | int retval; |
1da177e4 | 860 | |
287ac01a CS |
861 | retval = zfcp_fsf_open_port(erp_action); |
862 | if (retval == -ENOMEM) | |
863 | return ZFCP_ERP_NOMEM; | |
864 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; | |
865 | if (retval) | |
866 | return ZFCP_ERP_FAILED; | |
867 | return ZFCP_ERP_CONTINUES; | |
868 | } | |
1da177e4 | 869 | |
287ac01a | 870 | static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act) |
1da177e4 | 871 | { |
287ac01a CS |
872 | struct zfcp_adapter *adapter = act->adapter; |
873 | struct zfcp_port *port = act->port; | |
1da177e4 | 874 | |
287ac01a | 875 | if (port->wwpn != adapter->peer_wwpn) { |
edaed859 | 876 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
287ac01a CS |
877 | return ZFCP_ERP_FAILED; |
878 | } | |
879 | port->d_id = adapter->peer_d_id; | |
287ac01a CS |
880 | return zfcp_erp_port_strategy_open_port(act); |
881 | } | |
882 | ||
883 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) | |
884 | { | |
885 | struct zfcp_adapter *adapter = act->adapter; | |
886 | struct zfcp_port *port = act->port; | |
287ac01a CS |
887 | int p_status = atomic_read(&port->status); |
888 | ||
889 | switch (act->step) { | |
890 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
891 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
892 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
893 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) | |
894 | return zfcp_erp_open_ptp_port(act); | |
b98478d7 | 895 | if (!port->d_id) { |
934aeb58 | 896 | zfcp_fc_trigger_did_lookup(port); |
799b76d0 | 897 | return ZFCP_ERP_EXIT; |
287ac01a | 898 | } |
287ac01a CS |
899 | return zfcp_erp_port_strategy_open_port(act); |
900 | ||
901 | case ZFCP_ERP_STEP_PORT_OPENING: | |
902 | /* D_ID might have changed during open */ | |
5ab944f9 | 903 | if (p_status & ZFCP_STATUS_COMMON_OPEN) { |
934aeb58 CS |
904 | if (!port->d_id) { |
905 | zfcp_fc_trigger_did_lookup(port); | |
906 | return ZFCP_ERP_EXIT; | |
5ab944f9 | 907 | } |
934aeb58 | 908 | return ZFCP_ERP_SUCCEEDED; |
5ab944f9 | 909 | } |
ea460a81 SS |
910 | if (port->d_id && !(p_status & ZFCP_STATUS_COMMON_NOESC)) { |
911 | port->d_id = 0; | |
f7bd7c36 | 912 | return ZFCP_ERP_FAILED; |
ea460a81 SS |
913 | } |
914 | /* fall through otherwise */ | |
287ac01a CS |
915 | } |
916 | return ZFCP_ERP_FAILED; | |
917 | } | |
918 | ||
287ac01a CS |
919 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) |
920 | { | |
921 | struct zfcp_port *port = erp_action->port; | |
934aeb58 | 922 | int p_status = atomic_read(&port->status); |
287ac01a | 923 | |
934aeb58 CS |
924 | if ((p_status & ZFCP_STATUS_COMMON_NOESC) && |
925 | !(p_status & ZFCP_STATUS_COMMON_OPEN)) | |
5ab944f9 SS |
926 | goto close_init_done; |
927 | ||
287ac01a CS |
928 | switch (erp_action->step) { |
929 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
934aeb58 | 930 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 931 | return zfcp_erp_port_strategy_close(erp_action); |
1da177e4 LT |
932 | break; |
933 | ||
287ac01a | 934 | case ZFCP_ERP_STEP_PORT_CLOSING: |
934aeb58 | 935 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 936 | return ZFCP_ERP_FAILED; |
1da177e4 LT |
937 | break; |
938 | } | |
5ab944f9 SS |
939 | |
940 | close_init_done: | |
287ac01a CS |
941 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
942 | return ZFCP_ERP_EXIT; | |
1da177e4 | 943 | |
5ab944f9 | 944 | return zfcp_erp_port_strategy_open_common(erp_action); |
287ac01a CS |
945 | } |
946 | ||
b62a8d9b | 947 | static void zfcp_erp_lun_strategy_clearstati(struct scsi_device *sdev) |
287ac01a | 948 | { |
b62a8d9b CS |
949 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
950 | ||
805de8f4 | 951 | atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED, |
b62a8d9b | 952 | &zfcp_sdev->status); |
287ac01a CS |
953 | } |
954 | ||
b62a8d9b | 955 | static int zfcp_erp_lun_strategy_close(struct zfcp_erp_action *erp_action) |
287ac01a | 956 | { |
b62a8d9b | 957 | int retval = zfcp_fsf_close_lun(erp_action); |
287ac01a CS |
958 | if (retval == -ENOMEM) |
959 | return ZFCP_ERP_NOMEM; | |
b62a8d9b | 960 | erp_action->step = ZFCP_ERP_STEP_LUN_CLOSING; |
287ac01a CS |
961 | if (retval) |
962 | return ZFCP_ERP_FAILED; | |
963 | return ZFCP_ERP_CONTINUES; | |
964 | } | |
965 | ||
b62a8d9b | 966 | static int zfcp_erp_lun_strategy_open(struct zfcp_erp_action *erp_action) |
287ac01a | 967 | { |
b62a8d9b | 968 | int retval = zfcp_fsf_open_lun(erp_action); |
287ac01a CS |
969 | if (retval == -ENOMEM) |
970 | return ZFCP_ERP_NOMEM; | |
b62a8d9b | 971 | erp_action->step = ZFCP_ERP_STEP_LUN_OPENING; |
287ac01a CS |
972 | if (retval) |
973 | return ZFCP_ERP_FAILED; | |
974 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
975 | } |
976 | ||
b62a8d9b | 977 | static int zfcp_erp_lun_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 | 978 | { |
b62a8d9b CS |
979 | struct scsi_device *sdev = erp_action->sdev; |
980 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
287ac01a CS |
981 | |
982 | switch (erp_action->step) { | |
983 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
b62a8d9b CS |
984 | zfcp_erp_lun_strategy_clearstati(sdev); |
985 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
986 | return zfcp_erp_lun_strategy_close(erp_action); | |
287ac01a | 987 | /* already closed, fall through */ |
b62a8d9b CS |
988 | case ZFCP_ERP_STEP_LUN_CLOSING: |
989 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
287ac01a CS |
990 | return ZFCP_ERP_FAILED; |
991 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
992 | return ZFCP_ERP_EXIT; | |
b62a8d9b | 993 | return zfcp_erp_lun_strategy_open(erp_action); |
287ac01a | 994 | |
b62a8d9b CS |
995 | case ZFCP_ERP_STEP_LUN_OPENING: |
996 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
287ac01a CS |
997 | return ZFCP_ERP_SUCCEEDED; |
998 | } | |
999 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1000 | } |
1001 | ||
b62a8d9b | 1002 | static int zfcp_erp_strategy_check_lun(struct scsi_device *sdev, int result) |
1da177e4 | 1003 | { |
b62a8d9b CS |
1004 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1005 | ||
1da177e4 LT |
1006 | switch (result) { |
1007 | case ZFCP_ERP_SUCCEEDED : | |
b62a8d9b CS |
1008 | atomic_set(&zfcp_sdev->erp_counter, 0); |
1009 | zfcp_erp_lun_unblock(sdev); | |
1da177e4 LT |
1010 | break; |
1011 | case ZFCP_ERP_FAILED : | |
b62a8d9b CS |
1012 | atomic_inc(&zfcp_sdev->erp_counter); |
1013 | if (atomic_read(&zfcp_sdev->erp_counter) > ZFCP_MAX_ERPS) { | |
1014 | dev_err(&zfcp_sdev->port->adapter->ccw_device->dev, | |
1015 | "ERP failed for LUN 0x%016Lx on " | |
ff3b24fa | 1016 | "port 0x%016Lx\n", |
b62a8d9b CS |
1017 | (unsigned long long)zfcp_scsi_dev_lun(sdev), |
1018 | (unsigned long long)zfcp_sdev->port->wwpn); | |
edaed859 SS |
1019 | zfcp_erp_set_lun_status(sdev, |
1020 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1021 | } |
1da177e4 | 1022 | break; |
1da177e4 LT |
1023 | } |
1024 | ||
b62a8d9b CS |
1025 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1026 | zfcp_erp_lun_block(sdev, 0); | |
1da177e4 LT |
1027 | result = ZFCP_ERP_EXIT; |
1028 | } | |
1da177e4 LT |
1029 | return result; |
1030 | } | |
1031 | ||
287ac01a | 1032 | static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) |
1da177e4 | 1033 | { |
1da177e4 LT |
1034 | switch (result) { |
1035 | case ZFCP_ERP_SUCCEEDED : | |
1036 | atomic_set(&port->erp_counter, 0); | |
1037 | zfcp_erp_port_unblock(port); | |
1038 | break; | |
287ac01a | 1039 | |
1da177e4 | 1040 | case ZFCP_ERP_FAILED : |
287ac01a | 1041 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) { |
cc8c2829 SS |
1042 | zfcp_erp_port_block(port, 0); |
1043 | result = ZFCP_ERP_EXIT; | |
1044 | } | |
1da177e4 | 1045 | atomic_inc(&port->erp_counter); |
ff3b24fa CS |
1046 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) { |
1047 | dev_err(&port->adapter->ccw_device->dev, | |
1048 | "ERP failed for remote port 0x%016Lx\n", | |
7ba58c9c | 1049 | (unsigned long long)port->wwpn); |
edaed859 SS |
1050 | zfcp_erp_set_port_status(port, |
1051 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1052 | } |
1da177e4 | 1053 | break; |
1da177e4 LT |
1054 | } |
1055 | ||
287ac01a CS |
1056 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1057 | zfcp_erp_port_block(port, 0); | |
1da177e4 LT |
1058 | result = ZFCP_ERP_EXIT; |
1059 | } | |
1da177e4 LT |
1060 | return result; |
1061 | } | |
1062 | ||
287ac01a CS |
1063 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, |
1064 | int result) | |
1da177e4 | 1065 | { |
1da177e4 LT |
1066 | switch (result) { |
1067 | case ZFCP_ERP_SUCCEEDED : | |
1068 | atomic_set(&adapter->erp_counter, 0); | |
1069 | zfcp_erp_adapter_unblock(adapter); | |
1070 | break; | |
287ac01a | 1071 | |
1da177e4 LT |
1072 | case ZFCP_ERP_FAILED : |
1073 | atomic_inc(&adapter->erp_counter); | |
ff3b24fa CS |
1074 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) { |
1075 | dev_err(&adapter->ccw_device->dev, | |
1076 | "ERP cannot recover an error " | |
1077 | "on the FCP device\n"); | |
edaed859 SS |
1078 | zfcp_erp_set_adapter_status(adapter, |
1079 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1080 | } |
1da177e4 | 1081 | break; |
1da177e4 LT |
1082 | } |
1083 | ||
287ac01a CS |
1084 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1085 | zfcp_erp_adapter_block(adapter, 0); | |
1da177e4 LT |
1086 | result = ZFCP_ERP_EXIT; |
1087 | } | |
1da177e4 LT |
1088 | return result; |
1089 | } | |
1090 | ||
287ac01a CS |
1091 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, |
1092 | int result) | |
5f852be9 | 1093 | { |
287ac01a CS |
1094 | struct zfcp_adapter *adapter = erp_action->adapter; |
1095 | struct zfcp_port *port = erp_action->port; | |
b62a8d9b | 1096 | struct scsi_device *sdev = erp_action->sdev; |
287ac01a CS |
1097 | |
1098 | switch (erp_action->action) { | |
1099 | ||
b62a8d9b CS |
1100 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1101 | result = zfcp_erp_strategy_check_lun(sdev, result); | |
287ac01a CS |
1102 | break; |
1103 | ||
1104 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1105 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1106 | result = zfcp_erp_strategy_check_port(port, result); | |
1107 | break; | |
1108 | ||
1109 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1110 | result = zfcp_erp_strategy_check_adapter(adapter, result); | |
1111 | break; | |
1112 | } | |
1113 | return result; | |
5f852be9 CS |
1114 | } |
1115 | ||
287ac01a | 1116 | static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status) |
5f852be9 | 1117 | { |
287ac01a | 1118 | int status = atomic_read(target_status); |
5f852be9 | 1119 | |
287ac01a CS |
1120 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && |
1121 | (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1122 | return 1; /* take it online */ | |
5f852be9 | 1123 | |
287ac01a CS |
1124 | if (!(status & ZFCP_STATUS_COMMON_RUNNING) && |
1125 | !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1126 | return 1; /* take it offline */ | |
1127 | ||
1128 | return 0; | |
5f852be9 CS |
1129 | } |
1130 | ||
287ac01a | 1131 | static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret) |
1da177e4 | 1132 | { |
287ac01a CS |
1133 | int action = act->action; |
1134 | struct zfcp_adapter *adapter = act->adapter; | |
1135 | struct zfcp_port *port = act->port; | |
b62a8d9b CS |
1136 | struct scsi_device *sdev = act->sdev; |
1137 | struct zfcp_scsi_dev *zfcp_sdev; | |
287ac01a | 1138 | u32 erp_status = act->status; |
1da177e4 | 1139 | |
287ac01a | 1140 | switch (action) { |
1da177e4 | 1141 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
287ac01a CS |
1142 | if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) { |
1143 | _zfcp_erp_adapter_reopen(adapter, | |
1144 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1145 | "ersscg1"); |
287ac01a CS |
1146 | return ZFCP_ERP_EXIT; |
1147 | } | |
1da177e4 LT |
1148 | break; |
1149 | ||
1150 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1da177e4 | 1151 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
287ac01a CS |
1152 | if (zfcp_erp_strat_change_det(&port->status, erp_status)) { |
1153 | _zfcp_erp_port_reopen(port, | |
1154 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1155 | "ersscg2"); |
287ac01a CS |
1156 | return ZFCP_ERP_EXIT; |
1157 | } | |
1da177e4 LT |
1158 | break; |
1159 | ||
b62a8d9b CS |
1160 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1161 | zfcp_sdev = sdev_to_zfcp(sdev); | |
1162 | if (zfcp_erp_strat_change_det(&zfcp_sdev->status, erp_status)) { | |
1163 | _zfcp_erp_lun_reopen(sdev, | |
1164 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1165 | "ersscg3", 0); |
287ac01a CS |
1166 | return ZFCP_ERP_EXIT; |
1167 | } | |
1da177e4 LT |
1168 | break; |
1169 | } | |
287ac01a | 1170 | return ret; |
1da177e4 LT |
1171 | } |
1172 | ||
287ac01a | 1173 | static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) |
1da177e4 | 1174 | { |
287ac01a | 1175 | struct zfcp_adapter *adapter = erp_action->adapter; |
b62a8d9b | 1176 | struct zfcp_scsi_dev *zfcp_sdev; |
1da177e4 | 1177 | |
287ac01a CS |
1178 | adapter->erp_total_count--; |
1179 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1180 | adapter->erp_low_mem_count--; | |
1181 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
507e4969 | 1182 | } |
1da177e4 | 1183 | |
287ac01a | 1184 | list_del(&erp_action->list); |
ae0904f6 | 1185 | zfcp_dbf_rec_run("eractd1", erp_action); |
1da177e4 | 1186 | |
287ac01a | 1187 | switch (erp_action->action) { |
b62a8d9b CS |
1188 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1189 | zfcp_sdev = sdev_to_zfcp(erp_action->sdev); | |
805de8f4 | 1190 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
b62a8d9b | 1191 | &zfcp_sdev->status); |
287ac01a | 1192 | break; |
1da177e4 | 1193 | |
287ac01a CS |
1194 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
1195 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
805de8f4 | 1196 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
287ac01a CS |
1197 | &erp_action->port->status); |
1198 | break; | |
1da177e4 | 1199 | |
287ac01a | 1200 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
805de8f4 | 1201 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
287ac01a CS |
1202 | &erp_action->adapter->status); |
1203 | break; | |
1204 | } | |
1da177e4 LT |
1205 | } |
1206 | ||
287ac01a | 1207 | static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) |
1da177e4 | 1208 | { |
287ac01a CS |
1209 | struct zfcp_adapter *adapter = act->adapter; |
1210 | struct zfcp_port *port = act->port; | |
b62a8d9b | 1211 | struct scsi_device *sdev = act->sdev; |
1da177e4 | 1212 | |
287ac01a | 1213 | switch (act->action) { |
b62a8d9b | 1214 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
fdbd1c5e | 1215 | if (!(act->status & ZFCP_STATUS_ERP_NO_REF)) |
b62a8d9b | 1216 | scsi_device_put(sdev); |
287ac01a | 1217 | break; |
1da177e4 | 1218 | |
287ac01a | 1219 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
a2fa0aed CS |
1220 | if (result == ZFCP_ERP_SUCCEEDED) |
1221 | zfcp_scsi_schedule_rport_register(port); | |
5767620c CS |
1222 | /* fall through */ |
1223 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
615f59e0 | 1224 | put_device(&port->dev); |
287ac01a CS |
1225 | break; |
1226 | ||
1227 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
a2fa0aed | 1228 | if (result == ZFCP_ERP_SUCCEEDED) { |
bd43a42b | 1229 | register_service_level(&adapter->service_level); |
43f60cbd | 1230 | zfcp_fc_conditional_port_scan(adapter); |
038d9446 | 1231 | queue_work(adapter->work_queue, &adapter->ns_up_work); |
a2fa0aed CS |
1232 | } else |
1233 | unregister_service_level(&adapter->service_level); | |
038d9446 | 1234 | |
f3450c7b | 1235 | kref_put(&adapter->ref, zfcp_adapter_release); |
287ac01a CS |
1236 | break; |
1237 | } | |
1da177e4 LT |
1238 | } |
1239 | ||
287ac01a | 1240 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
1da177e4 | 1241 | { |
287ac01a CS |
1242 | switch (erp_action->action) { |
1243 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1244 | return zfcp_erp_adapter_strategy(erp_action); | |
1245 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1246 | return zfcp_erp_port_forced_strategy(erp_action); | |
1247 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1248 | return zfcp_erp_port_strategy(erp_action); | |
b62a8d9b CS |
1249 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1250 | return zfcp_erp_lun_strategy(erp_action); | |
287ac01a CS |
1251 | } |
1252 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1253 | } |
1254 | ||
287ac01a | 1255 | static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 LT |
1256 | { |
1257 | int retval; | |
287ac01a | 1258 | unsigned long flags; |
ecf0c772 | 1259 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1260 | |
f3450c7b | 1261 | kref_get(&adapter->ref); |
1da177e4 | 1262 | |
f3450c7b | 1263 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 1264 | zfcp_erp_strategy_check_fsfreq(erp_action); |
1da177e4 | 1265 | |
287ac01a CS |
1266 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
1267 | zfcp_erp_action_dequeue(erp_action); | |
1268 | retval = ZFCP_ERP_DISMISSED; | |
1269 | goto unlock; | |
22753fa5 | 1270 | } |
1da177e4 | 1271 | |
9c785d94 CS |
1272 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
1273 | retval = ZFCP_ERP_FAILED; | |
1274 | goto check_target; | |
1275 | } | |
1276 | ||
2f8f3ed5 | 1277 | zfcp_erp_action_to_running(erp_action); |
1da177e4 | 1278 | |
287ac01a | 1279 | /* no lock to allow for blocking operations */ |
ecf0c772 | 1280 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 1281 | retval = zfcp_erp_strategy_do_action(erp_action); |
ecf0c772 | 1282 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 1283 | |
287ac01a CS |
1284 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) |
1285 | retval = ZFCP_ERP_CONTINUES; | |
cc8c2829 | 1286 | |
287ac01a CS |
1287 | switch (retval) { |
1288 | case ZFCP_ERP_NOMEM: | |
1289 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { | |
1290 | ++adapter->erp_low_mem_count; | |
1291 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1292 | } |
287ac01a | 1293 | if (adapter->erp_total_count == adapter->erp_low_mem_count) |
ea4a3a6a | 1294 | _zfcp_erp_adapter_reopen(adapter, 0, "erstgy1"); |
287ac01a CS |
1295 | else { |
1296 | zfcp_erp_strategy_memwait(erp_action); | |
1297 | retval = ZFCP_ERP_CONTINUES; | |
1da177e4 | 1298 | } |
287ac01a | 1299 | goto unlock; |
1da177e4 | 1300 | |
287ac01a CS |
1301 | case ZFCP_ERP_CONTINUES: |
1302 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1303 | --adapter->erp_low_mem_count; | |
1304 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1305 | } |
287ac01a | 1306 | goto unlock; |
1da177e4 LT |
1307 | } |
1308 | ||
9c785d94 | 1309 | check_target: |
287ac01a CS |
1310 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
1311 | zfcp_erp_action_dequeue(erp_action); | |
1312 | retval = zfcp_erp_strategy_statechange(erp_action, retval); | |
1313 | if (retval == ZFCP_ERP_EXIT) | |
1314 | goto unlock; | |
85600f7f CS |
1315 | if (retval == ZFCP_ERP_SUCCEEDED) |
1316 | zfcp_erp_strategy_followup_success(erp_action); | |
1317 | if (retval == ZFCP_ERP_FAILED) | |
1318 | zfcp_erp_strategy_followup_failed(erp_action); | |
1da177e4 | 1319 | |
287ac01a | 1320 | unlock: |
ecf0c772 | 1321 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 | 1322 | |
287ac01a CS |
1323 | if (retval != ZFCP_ERP_CONTINUES) |
1324 | zfcp_erp_action_cleanup(erp_action, retval); | |
1da177e4 | 1325 | |
f3450c7b | 1326 | kref_put(&adapter->ref, zfcp_adapter_release); |
1da177e4 LT |
1327 | return retval; |
1328 | } | |
1329 | ||
287ac01a | 1330 | static int zfcp_erp_thread(void *data) |
1da177e4 | 1331 | { |
287ac01a CS |
1332 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
1333 | struct list_head *next; | |
1334 | struct zfcp_erp_action *act; | |
1335 | unsigned long flags; | |
94ab4b38 | 1336 | |
347c6a96 | 1337 | for (;;) { |
347c6a96 CS |
1338 | wait_event_interruptible(adapter->erp_ready_wq, |
1339 | !list_empty(&adapter->erp_ready_head) || | |
1340 | kthread_should_stop()); | |
94ab4b38 | 1341 | |
347c6a96 CS |
1342 | if (kthread_should_stop()) |
1343 | break; | |
1344 | ||
287ac01a CS |
1345 | write_lock_irqsave(&adapter->erp_lock, flags); |
1346 | next = adapter->erp_ready_head.next; | |
1347 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1da177e4 | 1348 | |
287ac01a CS |
1349 | if (next != &adapter->erp_ready_head) { |
1350 | act = list_entry(next, struct zfcp_erp_action, list); | |
1da177e4 | 1351 | |
287ac01a CS |
1352 | /* there is more to come after dismission, no notify */ |
1353 | if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) | |
1354 | zfcp_erp_wakeup(adapter); | |
1da177e4 | 1355 | } |
1da177e4 LT |
1356 | } |
1357 | ||
287ac01a CS |
1358 | return 0; |
1359 | } | |
1da177e4 | 1360 | |
287ac01a CS |
1361 | /** |
1362 | * zfcp_erp_thread_setup - Start ERP thread for adapter | |
1363 | * @adapter: Adapter to start the ERP thread for | |
1364 | * | |
1365 | * Returns 0 on success or error code from kernel_thread() | |
1366 | */ | |
1367 | int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) | |
1368 | { | |
347c6a96 | 1369 | struct task_struct *thread; |
1da177e4 | 1370 | |
347c6a96 CS |
1371 | thread = kthread_run(zfcp_erp_thread, adapter, "zfcperp%s", |
1372 | dev_name(&adapter->ccw_device->dev)); | |
1373 | if (IS_ERR(thread)) { | |
287ac01a | 1374 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa | 1375 | "Creating an ERP thread for the FCP device failed.\n"); |
347c6a96 | 1376 | return PTR_ERR(thread); |
1da177e4 | 1377 | } |
347c6a96 CS |
1378 | |
1379 | adapter->erp_thread = thread; | |
287ac01a CS |
1380 | return 0; |
1381 | } | |
1da177e4 | 1382 | |
287ac01a CS |
1383 | /** |
1384 | * zfcp_erp_thread_kill - Stop ERP thread. | |
1385 | * @adapter: Adapter where the ERP thread should be stopped. | |
1386 | * | |
1387 | * The caller of this routine ensures that the specified adapter has | |
1388 | * been shut down and that this operation has been completed. Thus, | |
1389 | * there are no pending erp_actions which would need to be handled | |
1390 | * here. | |
1391 | */ | |
1392 | void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) | |
1393 | { | |
347c6a96 CS |
1394 | kthread_stop(adapter->erp_thread); |
1395 | adapter->erp_thread = NULL; | |
143bb6bf CS |
1396 | WARN_ON(!list_empty(&adapter->erp_ready_head)); |
1397 | WARN_ON(!list_empty(&adapter->erp_running_head)); | |
1da177e4 LT |
1398 | } |
1399 | ||
287ac01a | 1400 | /** |
edaed859 SS |
1401 | * zfcp_erp_wait - wait for completion of error recovery on an adapter |
1402 | * @adapter: adapter for which to wait for completion of its error recovery | |
287ac01a | 1403 | */ |
edaed859 | 1404 | void zfcp_erp_wait(struct zfcp_adapter *adapter) |
1da177e4 | 1405 | { |
edaed859 SS |
1406 | wait_event(adapter->erp_done_wqh, |
1407 | !(atomic_read(&adapter->status) & | |
1408 | ZFCP_STATUS_ADAPTER_ERP_PENDING)); | |
287ac01a | 1409 | } |
1da177e4 | 1410 | |
287ac01a | 1411 | /** |
edaed859 SS |
1412 | * zfcp_erp_set_adapter_status - set adapter status bits |
1413 | * @adapter: adapter to change the status | |
1414 | * @mask: status bits to change | |
1415 | * | |
1416 | * Changes in common status bits are propagated to attached ports and LUNs. | |
287ac01a | 1417 | */ |
edaed859 | 1418 | void zfcp_erp_set_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
287ac01a | 1419 | { |
edaed859 SS |
1420 | struct zfcp_port *port; |
1421 | struct scsi_device *sdev; | |
1422 | unsigned long flags; | |
1423 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1da177e4 | 1424 | |
805de8f4 | 1425 | atomic_or(mask, &adapter->status); |
1da177e4 | 1426 | |
edaed859 SS |
1427 | if (!common_mask) |
1428 | return; | |
1429 | ||
1430 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1431 | list_for_each_entry(port, &adapter->port_list, list) | |
805de8f4 | 1432 | atomic_or(common_mask, &port->status); |
edaed859 SS |
1433 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
1434 | ||
924dd584 MP |
1435 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1436 | __shost_for_each_device(sdev, adapter->scsi_host) | |
805de8f4 | 1437 | atomic_or(common_mask, &sdev_to_zfcp(sdev)->status); |
924dd584 | 1438 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
287ac01a | 1439 | } |
1da177e4 | 1440 | |
287ac01a | 1441 | /** |
edaed859 | 1442 | * zfcp_erp_clear_adapter_status - clear adapter status bits |
287ac01a | 1443 | * @adapter: adapter to change the status |
287ac01a | 1444 | * @mask: status bits to change |
287ac01a | 1445 | * |
b62a8d9b | 1446 | * Changes in common status bits are propagated to attached ports and LUNs. |
287ac01a | 1447 | */ |
edaed859 | 1448 | void zfcp_erp_clear_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
1da177e4 | 1449 | { |
1da177e4 | 1450 | struct zfcp_port *port; |
edaed859 | 1451 | struct scsi_device *sdev; |
ecf0c772 | 1452 | unsigned long flags; |
287ac01a | 1453 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
edaed859 | 1454 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; |
1da177e4 | 1455 | |
805de8f4 | 1456 | atomic_andnot(mask, &adapter->status); |
edaed859 SS |
1457 | |
1458 | if (!common_mask) | |
1459 | return; | |
1460 | ||
1461 | if (clear_counter) | |
1462 | atomic_set(&adapter->erp_counter, 0); | |
1463 | ||
1464 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1465 | list_for_each_entry(port, &adapter->port_list, list) { | |
805de8f4 | 1466 | atomic_andnot(common_mask, &port->status); |
edaed859 SS |
1467 | if (clear_counter) |
1468 | atomic_set(&port->erp_counter, 0); | |
287ac01a | 1469 | } |
edaed859 | 1470 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
287ac01a | 1471 | |
924dd584 MP |
1472 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1473 | __shost_for_each_device(sdev, adapter->scsi_host) { | |
805de8f4 | 1474 | atomic_andnot(common_mask, &sdev_to_zfcp(sdev)->status); |
edaed859 SS |
1475 | if (clear_counter) |
1476 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
ecf0c772 | 1477 | } |
924dd584 | 1478 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1479 | } |
1480 | ||
287ac01a | 1481 | /** |
edaed859 SS |
1482 | * zfcp_erp_set_port_status - set port status bits |
1483 | * @port: port to change the status | |
287ac01a | 1484 | * @mask: status bits to change |
287ac01a | 1485 | * |
b62a8d9b | 1486 | * Changes in common status bits are propagated to attached LUNs. |
287ac01a | 1487 | */ |
edaed859 | 1488 | void zfcp_erp_set_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1489 | { |
b62a8d9b | 1490 | struct scsi_device *sdev; |
287ac01a | 1491 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
924dd584 | 1492 | unsigned long flags; |
1da177e4 | 1493 | |
805de8f4 | 1494 | atomic_or(mask, &port->status); |
1da177e4 | 1495 | |
edaed859 SS |
1496 | if (!common_mask) |
1497 | return; | |
1498 | ||
924dd584 MP |
1499 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1500 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1501 | if (sdev_to_zfcp(sdev)->port == port) |
805de8f4 | 1502 | atomic_or(common_mask, |
edaed859 | 1503 | &sdev_to_zfcp(sdev)->status); |
924dd584 | 1504 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1505 | } |
1506 | ||
287ac01a | 1507 | /** |
edaed859 SS |
1508 | * zfcp_erp_clear_port_status - clear port status bits |
1509 | * @port: adapter to change the status | |
287ac01a | 1510 | * @mask: status bits to change |
edaed859 SS |
1511 | * |
1512 | * Changes in common status bits are propagated to attached LUNs. | |
287ac01a | 1513 | */ |
edaed859 | 1514 | void zfcp_erp_clear_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1515 | { |
edaed859 SS |
1516 | struct scsi_device *sdev; |
1517 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1518 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; | |
924dd584 | 1519 | unsigned long flags; |
edaed859 | 1520 | |
805de8f4 | 1521 | atomic_andnot(mask, &port->status); |
edaed859 SS |
1522 | |
1523 | if (!common_mask) | |
1524 | return; | |
b62a8d9b | 1525 | |
edaed859 SS |
1526 | if (clear_counter) |
1527 | atomic_set(&port->erp_counter, 0); | |
1528 | ||
924dd584 MP |
1529 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1530 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1531 | if (sdev_to_zfcp(sdev)->port == port) { |
805de8f4 | 1532 | atomic_andnot(common_mask, |
edaed859 SS |
1533 | &sdev_to_zfcp(sdev)->status); |
1534 | if (clear_counter) | |
1535 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
287ac01a | 1536 | } |
924dd584 | 1537 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1538 | } |
1539 | ||
287ac01a | 1540 | /** |
edaed859 SS |
1541 | * zfcp_erp_set_lun_status - set lun status bits |
1542 | * @sdev: SCSI device / lun to set the status bits | |
1543 | * @mask: status bits to change | |
287ac01a | 1544 | */ |
edaed859 | 1545 | void zfcp_erp_set_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1546 | { |
edaed859 SS |
1547 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1548 | ||
805de8f4 | 1549 | atomic_or(mask, &zfcp_sdev->status); |
d736a27b AH |
1550 | } |
1551 | ||
287ac01a | 1552 | /** |
edaed859 SS |
1553 | * zfcp_erp_clear_lun_status - clear lun status bits |
1554 | * @sdev: SCSi device / lun to clear the status bits | |
1555 | * @mask: status bits to change | |
287ac01a | 1556 | */ |
edaed859 | 1557 | void zfcp_erp_clear_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1558 | { |
edaed859 SS |
1559 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1560 | ||
805de8f4 | 1561 | atomic_andnot(mask, &zfcp_sdev->status); |
edaed859 SS |
1562 | |
1563 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1564 | atomic_set(&zfcp_sdev->erp_counter, 0); | |
d736a27b | 1565 | } |
edaed859 | 1566 |