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Commit | Line | Data |
---|---|---|
41fa2ada | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Error Recovery Procedures (ERP). |
41fa2ada | 5 | * |
6f2ce1c6 | 6 | * Copyright IBM Corp. 2002, 2016 |
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 | { |
bc46427e LK |
575 | setup_timer(&erp_action->timer, zfcp_erp_memwait_handler, |
576 | (unsigned long) erp_action); | |
287ac01a CS |
577 | erp_action->timer.expires = jiffies + HZ; |
578 | add_timer(&erp_action->timer); | |
1da177e4 LT |
579 | } |
580 | ||
287ac01a | 581 | static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, |
ea4a3a6a | 582 | int clear, char *id) |
1da177e4 | 583 | { |
287ac01a | 584 | struct zfcp_port *port; |
1da177e4 | 585 | |
ecf0c772 SS |
586 | read_lock(&adapter->port_list_lock); |
587 | list_for_each_entry(port, &adapter->port_list, list) | |
ea4a3a6a | 588 | _zfcp_erp_port_reopen(port, clear, id); |
ecf0c772 | 589 | read_unlock(&adapter->port_list_lock); |
1da177e4 LT |
590 | } |
591 | ||
b62a8d9b | 592 | static void _zfcp_erp_lun_reopen_all(struct zfcp_port *port, int clear, |
ea4a3a6a | 593 | char *id) |
1da177e4 | 594 | { |
b62a8d9b | 595 | struct scsi_device *sdev; |
1da177e4 | 596 | |
924dd584 MP |
597 | spin_lock(port->adapter->scsi_host->host_lock); |
598 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
b62a8d9b | 599 | if (sdev_to_zfcp(sdev)->port == port) |
ea4a3a6a | 600 | _zfcp_erp_lun_reopen(sdev, clear, id, 0); |
924dd584 | 601 | spin_unlock(port->adapter->scsi_host->host_lock); |
1da177e4 LT |
602 | } |
603 | ||
85600f7f | 604 | static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act) |
1da177e4 | 605 | { |
287ac01a | 606 | switch (act->action) { |
287ac01a | 607 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
ea4a3a6a | 608 | _zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1"); |
287ac01a | 609 | break; |
287ac01a | 610 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
ea4a3a6a | 611 | _zfcp_erp_port_forced_reopen(act->port, 0, "ersff_2"); |
287ac01a | 612 | break; |
287ac01a | 613 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
ea4a3a6a | 614 | _zfcp_erp_port_reopen(act->port, 0, "ersff_3"); |
287ac01a | 615 | break; |
b62a8d9b | 616 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
ea4a3a6a | 617 | _zfcp_erp_lun_reopen(act->sdev, 0, "ersff_4", 0); |
85600f7f CS |
618 | break; |
619 | } | |
620 | } | |
621 | ||
622 | static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act) | |
623 | { | |
624 | switch (act->action) { | |
625 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
ea4a3a6a | 626 | _zfcp_erp_port_reopen_all(act->adapter, 0, "ersfs_1"); |
85600f7f CS |
627 | break; |
628 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
ea4a3a6a | 629 | _zfcp_erp_port_reopen(act->port, 0, "ersfs_2"); |
85600f7f CS |
630 | break; |
631 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
ea4a3a6a | 632 | _zfcp_erp_lun_reopen_all(act->port, 0, "ersfs_3"); |
287ac01a | 633 | break; |
1da177e4 | 634 | } |
1da177e4 LT |
635 | } |
636 | ||
287ac01a | 637 | static void zfcp_erp_wakeup(struct zfcp_adapter *adapter) |
1da177e4 | 638 | { |
1da177e4 LT |
639 | unsigned long flags; |
640 | ||
ecf0c772 | 641 | read_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a CS |
642 | if (list_empty(&adapter->erp_ready_head) && |
643 | list_empty(&adapter->erp_running_head)) { | |
805de8f4 | 644 | atomic_andnot(ZFCP_STATUS_ADAPTER_ERP_PENDING, |
287ac01a CS |
645 | &adapter->status); |
646 | wake_up(&adapter->erp_done_wqh); | |
1da177e4 | 647 | } |
ecf0c772 | 648 | read_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 649 | } |
1da177e4 | 650 | |
287ac01a CS |
651 | static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter) |
652 | { | |
653 | struct zfcp_port *port; | |
654 | port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, | |
655 | adapter->peer_d_id); | |
656 | if (IS_ERR(port)) /* error or port already attached */ | |
657 | return; | |
ea4a3a6a | 658 | _zfcp_erp_port_reopen(port, 0, "ereptp1"); |
287ac01a | 659 | } |
1da177e4 | 660 | |
287ac01a CS |
661 | static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action) |
662 | { | |
663 | int retries; | |
664 | int sleep = 1; | |
665 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1da177e4 | 666 | |
805de8f4 | 667 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); |
287ac01a CS |
668 | |
669 | for (retries = 7; retries; retries--) { | |
805de8f4 | 670 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a CS |
671 | &adapter->status); |
672 | write_lock_irq(&adapter->erp_lock); | |
673 | zfcp_erp_action_to_running(erp_action); | |
674 | write_unlock_irq(&adapter->erp_lock); | |
675 | if (zfcp_fsf_exchange_config_data(erp_action)) { | |
805de8f4 | 676 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a CS |
677 | &adapter->status); |
678 | return ZFCP_ERP_FAILED; | |
1da177e4 | 679 | } |
1da177e4 | 680 | |
347c6a96 CS |
681 | wait_event(adapter->erp_ready_wq, |
682 | !list_empty(&adapter->erp_ready_head)); | |
287ac01a CS |
683 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) |
684 | break; | |
1da177e4 | 685 | |
287ac01a CS |
686 | if (!(atomic_read(&adapter->status) & |
687 | ZFCP_STATUS_ADAPTER_HOST_CON_INIT)) | |
688 | break; | |
1da177e4 | 689 | |
287ac01a CS |
690 | ssleep(sleep); |
691 | sleep *= 2; | |
1da177e4 LT |
692 | } |
693 | ||
805de8f4 | 694 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a | 695 | &adapter->status); |
1da177e4 | 696 | |
287ac01a CS |
697 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK)) |
698 | return ZFCP_ERP_FAILED; | |
41fa2ada | 699 | |
287ac01a CS |
700 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) |
701 | zfcp_erp_enqueue_ptp_port(adapter); | |
1da177e4 | 702 | |
287ac01a | 703 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
704 | } |
705 | ||
287ac01a | 706 | static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act) |
1da177e4 | 707 | { |
287ac01a CS |
708 | int ret; |
709 | struct zfcp_adapter *adapter = act->adapter; | |
1da177e4 | 710 | |
287ac01a CS |
711 | write_lock_irq(&adapter->erp_lock); |
712 | zfcp_erp_action_to_running(act); | |
713 | write_unlock_irq(&adapter->erp_lock); | |
714 | ||
715 | ret = zfcp_fsf_exchange_port_data(act); | |
716 | if (ret == -EOPNOTSUPP) | |
717 | return ZFCP_ERP_SUCCEEDED; | |
718 | if (ret) | |
719 | return ZFCP_ERP_FAILED; | |
720 | ||
ae0904f6 | 721 | zfcp_dbf_rec_run("erasox1", act); |
347c6a96 CS |
722 | wait_event(adapter->erp_ready_wq, |
723 | !list_empty(&adapter->erp_ready_head)); | |
ae0904f6 | 724 | zfcp_dbf_rec_run("erasox2", act); |
287ac01a CS |
725 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
726 | return ZFCP_ERP_FAILED; | |
727 | ||
728 | return ZFCP_ERP_SUCCEEDED; | |
1da177e4 LT |
729 | } |
730 | ||
287ac01a | 731 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) |
1da177e4 | 732 | { |
287ac01a CS |
733 | if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED) |
734 | return ZFCP_ERP_FAILED; | |
1da177e4 | 735 | |
287ac01a CS |
736 | if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) |
737 | return ZFCP_ERP_FAILED; | |
1da177e4 | 738 | |
c7b279ae | 739 | if (mempool_resize(act->adapter->pool.sr_data, |
11d83360 | 740 | act->adapter->stat_read_buf_num)) |
8d88cf3f CS |
741 | return ZFCP_ERP_FAILED; |
742 | ||
743 | if (mempool_resize(act->adapter->pool.status_read_req, | |
11d83360 | 744 | act->adapter->stat_read_buf_num)) |
8d88cf3f CS |
745 | return ZFCP_ERP_FAILED; |
746 | ||
64deb6ef | 747 | atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num); |
287ac01a CS |
748 | if (zfcp_status_read_refill(act->adapter)) |
749 | return ZFCP_ERP_FAILED; | |
1da177e4 | 750 | |
287ac01a CS |
751 | return ZFCP_ERP_SUCCEEDED; |
752 | } | |
1da177e4 | 753 | |
cf13c082 | 754 | static void zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *act) |
287ac01a | 755 | { |
287ac01a | 756 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 757 | |
287ac01a | 758 | /* close queues to ensure that buffers are not accessed by adapter */ |
564e1c86 | 759 | zfcp_qdio_close(adapter->qdio); |
287ac01a CS |
760 | zfcp_fsf_req_dismiss_all(adapter); |
761 | adapter->fsf_req_seq_no = 0; | |
55c770fa | 762 | zfcp_fc_wka_ports_force_offline(adapter->gs); |
b62a8d9b | 763 | /* all ports and LUNs are closed */ |
edaed859 | 764 | zfcp_erp_clear_adapter_status(adapter, ZFCP_STATUS_COMMON_OPEN); |
cf13c082 | 765 | |
805de8f4 | 766 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
cf13c082 | 767 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); |
1da177e4 LT |
768 | } |
769 | ||
cf13c082 | 770 | static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *act) |
1da177e4 | 771 | { |
cf13c082 | 772 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 773 | |
3d63d3b4 | 774 | if (zfcp_qdio_open(adapter->qdio)) { |
805de8f4 | 775 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
cf13c082 SS |
776 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, |
777 | &adapter->status); | |
778 | return ZFCP_ERP_FAILED; | |
779 | } | |
287ac01a | 780 | |
cf13c082 SS |
781 | if (zfcp_erp_adapter_strategy_open_fsf(act)) { |
782 | zfcp_erp_adapter_strategy_close(act); | |
783 | return ZFCP_ERP_FAILED; | |
784 | } | |
785 | ||
805de8f4 | 786 | atomic_or(ZFCP_STATUS_COMMON_OPEN, &adapter->status); |
cf13c082 SS |
787 | |
788 | return ZFCP_ERP_SUCCEEDED; | |
789 | } | |
287ac01a | 790 | |
cf13c082 SS |
791 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act) |
792 | { | |
793 | struct zfcp_adapter *adapter = act->adapter; | |
794 | ||
795 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN) { | |
796 | zfcp_erp_adapter_strategy_close(act); | |
797 | if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
798 | return ZFCP_ERP_EXIT; | |
799 | } | |
800 | ||
801 | if (zfcp_erp_adapter_strategy_open(act)) { | |
287ac01a | 802 | ssleep(8); |
cf13c082 SS |
803 | return ZFCP_ERP_FAILED; |
804 | } | |
1da177e4 | 805 | |
cf13c082 | 806 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
807 | } |
808 | ||
287ac01a | 809 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) |
1da177e4 | 810 | { |
287ac01a CS |
811 | int retval; |
812 | ||
813 | retval = zfcp_fsf_close_physical_port(act); | |
814 | if (retval == -ENOMEM) | |
815 | return ZFCP_ERP_NOMEM; | |
816 | act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; | |
817 | if (retval) | |
818 | return ZFCP_ERP_FAILED; | |
819 | ||
820 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
821 | } |
822 | ||
287ac01a CS |
823 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) |
824 | { | |
825 | struct zfcp_port *port = erp_action->port; | |
826 | int status = atomic_read(&port->status); | |
827 | ||
828 | switch (erp_action->step) { | |
829 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
287ac01a CS |
830 | if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) && |
831 | (status & ZFCP_STATUS_COMMON_OPEN)) | |
832 | return zfcp_erp_port_forced_strategy_close(erp_action); | |
833 | else | |
834 | return ZFCP_ERP_FAILED; | |
835 | ||
836 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
ddb3e0c1 | 837 | if (!(status & ZFCP_STATUS_PORT_PHYS_OPEN)) |
287ac01a CS |
838 | return ZFCP_ERP_SUCCEEDED; |
839 | } | |
840 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
841 | } |
842 | ||
287ac01a | 843 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) |
1da177e4 | 844 | { |
287ac01a | 845 | int retval; |
1da177e4 | 846 | |
287ac01a CS |
847 | retval = zfcp_fsf_close_port(erp_action); |
848 | if (retval == -ENOMEM) | |
849 | return ZFCP_ERP_NOMEM; | |
850 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; | |
851 | if (retval) | |
852 | return ZFCP_ERP_FAILED; | |
853 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
854 | } |
855 | ||
287ac01a | 856 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) |
1da177e4 | 857 | { |
287ac01a | 858 | int retval; |
1da177e4 | 859 | |
287ac01a CS |
860 | retval = zfcp_fsf_open_port(erp_action); |
861 | if (retval == -ENOMEM) | |
862 | return ZFCP_ERP_NOMEM; | |
863 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; | |
864 | if (retval) | |
865 | return ZFCP_ERP_FAILED; | |
866 | return ZFCP_ERP_CONTINUES; | |
867 | } | |
1da177e4 | 868 | |
287ac01a | 869 | static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act) |
1da177e4 | 870 | { |
287ac01a CS |
871 | struct zfcp_adapter *adapter = act->adapter; |
872 | struct zfcp_port *port = act->port; | |
1da177e4 | 873 | |
287ac01a | 874 | if (port->wwpn != adapter->peer_wwpn) { |
edaed859 | 875 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
287ac01a CS |
876 | return ZFCP_ERP_FAILED; |
877 | } | |
878 | port->d_id = adapter->peer_d_id; | |
287ac01a CS |
879 | return zfcp_erp_port_strategy_open_port(act); |
880 | } | |
881 | ||
882 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) | |
883 | { | |
884 | struct zfcp_adapter *adapter = act->adapter; | |
885 | struct zfcp_port *port = act->port; | |
287ac01a CS |
886 | int p_status = atomic_read(&port->status); |
887 | ||
888 | switch (act->step) { | |
889 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
890 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
891 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
892 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) | |
893 | return zfcp_erp_open_ptp_port(act); | |
b98478d7 | 894 | if (!port->d_id) { |
934aeb58 | 895 | zfcp_fc_trigger_did_lookup(port); |
799b76d0 | 896 | return ZFCP_ERP_EXIT; |
287ac01a | 897 | } |
287ac01a CS |
898 | return zfcp_erp_port_strategy_open_port(act); |
899 | ||
900 | case ZFCP_ERP_STEP_PORT_OPENING: | |
901 | /* D_ID might have changed during open */ | |
5ab944f9 | 902 | if (p_status & ZFCP_STATUS_COMMON_OPEN) { |
934aeb58 CS |
903 | if (!port->d_id) { |
904 | zfcp_fc_trigger_did_lookup(port); | |
905 | return ZFCP_ERP_EXIT; | |
5ab944f9 | 906 | } |
934aeb58 | 907 | return ZFCP_ERP_SUCCEEDED; |
5ab944f9 | 908 | } |
ea460a81 SS |
909 | if (port->d_id && !(p_status & ZFCP_STATUS_COMMON_NOESC)) { |
910 | port->d_id = 0; | |
f7bd7c36 | 911 | return ZFCP_ERP_FAILED; |
ea460a81 SS |
912 | } |
913 | /* fall through otherwise */ | |
287ac01a CS |
914 | } |
915 | return ZFCP_ERP_FAILED; | |
916 | } | |
917 | ||
287ac01a CS |
918 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) |
919 | { | |
920 | struct zfcp_port *port = erp_action->port; | |
934aeb58 | 921 | int p_status = atomic_read(&port->status); |
287ac01a | 922 | |
934aeb58 CS |
923 | if ((p_status & ZFCP_STATUS_COMMON_NOESC) && |
924 | !(p_status & ZFCP_STATUS_COMMON_OPEN)) | |
5ab944f9 SS |
925 | goto close_init_done; |
926 | ||
287ac01a CS |
927 | switch (erp_action->step) { |
928 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
934aeb58 | 929 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 930 | return zfcp_erp_port_strategy_close(erp_action); |
1da177e4 LT |
931 | break; |
932 | ||
287ac01a | 933 | case ZFCP_ERP_STEP_PORT_CLOSING: |
934aeb58 | 934 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 935 | return ZFCP_ERP_FAILED; |
1da177e4 LT |
936 | break; |
937 | } | |
5ab944f9 SS |
938 | |
939 | close_init_done: | |
287ac01a CS |
940 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
941 | return ZFCP_ERP_EXIT; | |
1da177e4 | 942 | |
5ab944f9 | 943 | return zfcp_erp_port_strategy_open_common(erp_action); |
287ac01a CS |
944 | } |
945 | ||
b62a8d9b | 946 | static void zfcp_erp_lun_strategy_clearstati(struct scsi_device *sdev) |
287ac01a | 947 | { |
b62a8d9b CS |
948 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
949 | ||
805de8f4 | 950 | atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED, |
b62a8d9b | 951 | &zfcp_sdev->status); |
287ac01a CS |
952 | } |
953 | ||
b62a8d9b | 954 | static int zfcp_erp_lun_strategy_close(struct zfcp_erp_action *erp_action) |
287ac01a | 955 | { |
b62a8d9b | 956 | int retval = zfcp_fsf_close_lun(erp_action); |
287ac01a CS |
957 | if (retval == -ENOMEM) |
958 | return ZFCP_ERP_NOMEM; | |
b62a8d9b | 959 | erp_action->step = ZFCP_ERP_STEP_LUN_CLOSING; |
287ac01a CS |
960 | if (retval) |
961 | return ZFCP_ERP_FAILED; | |
962 | return ZFCP_ERP_CONTINUES; | |
963 | } | |
964 | ||
b62a8d9b | 965 | static int zfcp_erp_lun_strategy_open(struct zfcp_erp_action *erp_action) |
287ac01a | 966 | { |
b62a8d9b | 967 | int retval = zfcp_fsf_open_lun(erp_action); |
287ac01a CS |
968 | if (retval == -ENOMEM) |
969 | return ZFCP_ERP_NOMEM; | |
b62a8d9b | 970 | erp_action->step = ZFCP_ERP_STEP_LUN_OPENING; |
287ac01a CS |
971 | if (retval) |
972 | return ZFCP_ERP_FAILED; | |
973 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
974 | } |
975 | ||
b62a8d9b | 976 | static int zfcp_erp_lun_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 | 977 | { |
b62a8d9b CS |
978 | struct scsi_device *sdev = erp_action->sdev; |
979 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
287ac01a CS |
980 | |
981 | switch (erp_action->step) { | |
982 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
b62a8d9b CS |
983 | zfcp_erp_lun_strategy_clearstati(sdev); |
984 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
985 | return zfcp_erp_lun_strategy_close(erp_action); | |
287ac01a | 986 | /* already closed, fall through */ |
b62a8d9b CS |
987 | case ZFCP_ERP_STEP_LUN_CLOSING: |
988 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
287ac01a CS |
989 | return ZFCP_ERP_FAILED; |
990 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
991 | return ZFCP_ERP_EXIT; | |
b62a8d9b | 992 | return zfcp_erp_lun_strategy_open(erp_action); |
287ac01a | 993 | |
b62a8d9b CS |
994 | case ZFCP_ERP_STEP_LUN_OPENING: |
995 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
287ac01a CS |
996 | return ZFCP_ERP_SUCCEEDED; |
997 | } | |
998 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
999 | } |
1000 | ||
b62a8d9b | 1001 | static int zfcp_erp_strategy_check_lun(struct scsi_device *sdev, int result) |
1da177e4 | 1002 | { |
b62a8d9b CS |
1003 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1004 | ||
1da177e4 LT |
1005 | switch (result) { |
1006 | case ZFCP_ERP_SUCCEEDED : | |
b62a8d9b CS |
1007 | atomic_set(&zfcp_sdev->erp_counter, 0); |
1008 | zfcp_erp_lun_unblock(sdev); | |
1da177e4 LT |
1009 | break; |
1010 | case ZFCP_ERP_FAILED : | |
b62a8d9b CS |
1011 | atomic_inc(&zfcp_sdev->erp_counter); |
1012 | if (atomic_read(&zfcp_sdev->erp_counter) > ZFCP_MAX_ERPS) { | |
1013 | dev_err(&zfcp_sdev->port->adapter->ccw_device->dev, | |
1014 | "ERP failed for LUN 0x%016Lx on " | |
ff3b24fa | 1015 | "port 0x%016Lx\n", |
b62a8d9b CS |
1016 | (unsigned long long)zfcp_scsi_dev_lun(sdev), |
1017 | (unsigned long long)zfcp_sdev->port->wwpn); | |
edaed859 SS |
1018 | zfcp_erp_set_lun_status(sdev, |
1019 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1020 | } |
1da177e4 | 1021 | break; |
1da177e4 LT |
1022 | } |
1023 | ||
b62a8d9b CS |
1024 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1025 | zfcp_erp_lun_block(sdev, 0); | |
1da177e4 LT |
1026 | result = ZFCP_ERP_EXIT; |
1027 | } | |
1da177e4 LT |
1028 | return result; |
1029 | } | |
1030 | ||
287ac01a | 1031 | static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) |
1da177e4 | 1032 | { |
1da177e4 LT |
1033 | switch (result) { |
1034 | case ZFCP_ERP_SUCCEEDED : | |
1035 | atomic_set(&port->erp_counter, 0); | |
1036 | zfcp_erp_port_unblock(port); | |
1037 | break; | |
287ac01a | 1038 | |
1da177e4 | 1039 | case ZFCP_ERP_FAILED : |
287ac01a | 1040 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) { |
cc8c2829 SS |
1041 | zfcp_erp_port_block(port, 0); |
1042 | result = ZFCP_ERP_EXIT; | |
1043 | } | |
1da177e4 | 1044 | atomic_inc(&port->erp_counter); |
ff3b24fa CS |
1045 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) { |
1046 | dev_err(&port->adapter->ccw_device->dev, | |
1047 | "ERP failed for remote port 0x%016Lx\n", | |
7ba58c9c | 1048 | (unsigned long long)port->wwpn); |
edaed859 SS |
1049 | zfcp_erp_set_port_status(port, |
1050 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1051 | } |
1da177e4 | 1052 | break; |
1da177e4 LT |
1053 | } |
1054 | ||
287ac01a CS |
1055 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1056 | zfcp_erp_port_block(port, 0); | |
1da177e4 LT |
1057 | result = ZFCP_ERP_EXIT; |
1058 | } | |
1da177e4 LT |
1059 | return result; |
1060 | } | |
1061 | ||
287ac01a CS |
1062 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, |
1063 | int result) | |
1da177e4 | 1064 | { |
1da177e4 LT |
1065 | switch (result) { |
1066 | case ZFCP_ERP_SUCCEEDED : | |
1067 | atomic_set(&adapter->erp_counter, 0); | |
1068 | zfcp_erp_adapter_unblock(adapter); | |
1069 | break; | |
287ac01a | 1070 | |
1da177e4 LT |
1071 | case ZFCP_ERP_FAILED : |
1072 | atomic_inc(&adapter->erp_counter); | |
ff3b24fa CS |
1073 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) { |
1074 | dev_err(&adapter->ccw_device->dev, | |
1075 | "ERP cannot recover an error " | |
1076 | "on the FCP device\n"); | |
edaed859 SS |
1077 | zfcp_erp_set_adapter_status(adapter, |
1078 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1079 | } |
1da177e4 | 1080 | break; |
1da177e4 LT |
1081 | } |
1082 | ||
287ac01a CS |
1083 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1084 | zfcp_erp_adapter_block(adapter, 0); | |
1da177e4 LT |
1085 | result = ZFCP_ERP_EXIT; |
1086 | } | |
1da177e4 LT |
1087 | return result; |
1088 | } | |
1089 | ||
287ac01a CS |
1090 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, |
1091 | int result) | |
5f852be9 | 1092 | { |
287ac01a CS |
1093 | struct zfcp_adapter *adapter = erp_action->adapter; |
1094 | struct zfcp_port *port = erp_action->port; | |
b62a8d9b | 1095 | struct scsi_device *sdev = erp_action->sdev; |
287ac01a CS |
1096 | |
1097 | switch (erp_action->action) { | |
1098 | ||
b62a8d9b CS |
1099 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1100 | result = zfcp_erp_strategy_check_lun(sdev, result); | |
287ac01a CS |
1101 | break; |
1102 | ||
1103 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1104 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1105 | result = zfcp_erp_strategy_check_port(port, result); | |
1106 | break; | |
1107 | ||
1108 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1109 | result = zfcp_erp_strategy_check_adapter(adapter, result); | |
1110 | break; | |
1111 | } | |
1112 | return result; | |
5f852be9 CS |
1113 | } |
1114 | ||
287ac01a | 1115 | static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status) |
5f852be9 | 1116 | { |
287ac01a | 1117 | int status = atomic_read(target_status); |
5f852be9 | 1118 | |
287ac01a CS |
1119 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && |
1120 | (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1121 | return 1; /* take it online */ | |
5f852be9 | 1122 | |
287ac01a CS |
1123 | if (!(status & ZFCP_STATUS_COMMON_RUNNING) && |
1124 | !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1125 | return 1; /* take it offline */ | |
1126 | ||
1127 | return 0; | |
5f852be9 CS |
1128 | } |
1129 | ||
287ac01a | 1130 | static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret) |
1da177e4 | 1131 | { |
287ac01a CS |
1132 | int action = act->action; |
1133 | struct zfcp_adapter *adapter = act->adapter; | |
1134 | struct zfcp_port *port = act->port; | |
b62a8d9b CS |
1135 | struct scsi_device *sdev = act->sdev; |
1136 | struct zfcp_scsi_dev *zfcp_sdev; | |
287ac01a | 1137 | u32 erp_status = act->status; |
1da177e4 | 1138 | |
287ac01a | 1139 | switch (action) { |
1da177e4 | 1140 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
287ac01a CS |
1141 | if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) { |
1142 | _zfcp_erp_adapter_reopen(adapter, | |
1143 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1144 | "ersscg1"); |
287ac01a CS |
1145 | return ZFCP_ERP_EXIT; |
1146 | } | |
1da177e4 LT |
1147 | break; |
1148 | ||
1149 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1da177e4 | 1150 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
287ac01a CS |
1151 | if (zfcp_erp_strat_change_det(&port->status, erp_status)) { |
1152 | _zfcp_erp_port_reopen(port, | |
1153 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1154 | "ersscg2"); |
287ac01a CS |
1155 | return ZFCP_ERP_EXIT; |
1156 | } | |
1da177e4 LT |
1157 | break; |
1158 | ||
b62a8d9b CS |
1159 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1160 | zfcp_sdev = sdev_to_zfcp(sdev); | |
1161 | if (zfcp_erp_strat_change_det(&zfcp_sdev->status, erp_status)) { | |
1162 | _zfcp_erp_lun_reopen(sdev, | |
1163 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1164 | "ersscg3", 0); |
287ac01a CS |
1165 | return ZFCP_ERP_EXIT; |
1166 | } | |
1da177e4 LT |
1167 | break; |
1168 | } | |
287ac01a | 1169 | return ret; |
1da177e4 LT |
1170 | } |
1171 | ||
287ac01a | 1172 | static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) |
1da177e4 | 1173 | { |
287ac01a | 1174 | struct zfcp_adapter *adapter = erp_action->adapter; |
b62a8d9b | 1175 | struct zfcp_scsi_dev *zfcp_sdev; |
1da177e4 | 1176 | |
287ac01a CS |
1177 | adapter->erp_total_count--; |
1178 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1179 | adapter->erp_low_mem_count--; | |
1180 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
507e4969 | 1181 | } |
1da177e4 | 1182 | |
287ac01a | 1183 | list_del(&erp_action->list); |
ae0904f6 | 1184 | zfcp_dbf_rec_run("eractd1", erp_action); |
1da177e4 | 1185 | |
287ac01a | 1186 | switch (erp_action->action) { |
b62a8d9b CS |
1187 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1188 | zfcp_sdev = sdev_to_zfcp(erp_action->sdev); | |
805de8f4 | 1189 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
b62a8d9b | 1190 | &zfcp_sdev->status); |
287ac01a | 1191 | break; |
1da177e4 | 1192 | |
287ac01a CS |
1193 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
1194 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
805de8f4 | 1195 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
287ac01a CS |
1196 | &erp_action->port->status); |
1197 | break; | |
1da177e4 | 1198 | |
287ac01a | 1199 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
805de8f4 | 1200 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
287ac01a CS |
1201 | &erp_action->adapter->status); |
1202 | break; | |
1203 | } | |
1da177e4 LT |
1204 | } |
1205 | ||
6f2ce1c6 SM |
1206 | /** |
1207 | * zfcp_erp_try_rport_unblock - unblock rport if no more/new recovery | |
1208 | * @port: zfcp_port whose fc_rport we should try to unblock | |
1209 | */ | |
1210 | static void zfcp_erp_try_rport_unblock(struct zfcp_port *port) | |
1211 | { | |
1212 | unsigned long flags; | |
1213 | struct zfcp_adapter *adapter = port->adapter; | |
1214 | int port_status; | |
1215 | struct Scsi_Host *shost = adapter->scsi_host; | |
1216 | struct scsi_device *sdev; | |
1217 | ||
1218 | write_lock_irqsave(&adapter->erp_lock, flags); | |
1219 | port_status = atomic_read(&port->status); | |
1220 | if ((port_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || | |
1221 | (port_status & (ZFCP_STATUS_COMMON_ERP_INUSE | | |
1222 | ZFCP_STATUS_COMMON_ERP_FAILED)) != 0) { | |
1223 | /* new ERP of severity >= port triggered elsewhere meanwhile or | |
1224 | * local link down (adapter erp_failed but not clear unblock) | |
1225 | */ | |
1226 | zfcp_dbf_rec_run_lvl(4, "ertru_p", &port->erp_action); | |
1227 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1228 | return; | |
1229 | } | |
1230 | spin_lock(shost->host_lock); | |
1231 | __shost_for_each_device(sdev, shost) { | |
1232 | struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev); | |
1233 | int lun_status; | |
1234 | ||
1235 | if (zsdev->port != port) | |
1236 | continue; | |
1237 | /* LUN under port of interest */ | |
1238 | lun_status = atomic_read(&zsdev->status); | |
1239 | if ((lun_status & ZFCP_STATUS_COMMON_ERP_FAILED) != 0) | |
1240 | continue; /* unblock rport despite failed LUNs */ | |
1241 | /* LUN recovery not given up yet [maybe follow-up pending] */ | |
1242 | if ((lun_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || | |
1243 | (lun_status & ZFCP_STATUS_COMMON_ERP_INUSE) != 0) { | |
1244 | /* LUN blocked: | |
1245 | * not yet unblocked [LUN recovery pending] | |
1246 | * or meanwhile blocked [new LUN recovery triggered] | |
1247 | */ | |
1248 | zfcp_dbf_rec_run_lvl(4, "ertru_l", &zsdev->erp_action); | |
1249 | spin_unlock(shost->host_lock); | |
1250 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1251 | return; | |
1252 | } | |
1253 | } | |
1254 | /* now port has no child or all children have completed recovery, | |
1255 | * and no ERP of severity >= port was meanwhile triggered elsewhere | |
1256 | */ | |
1257 | zfcp_scsi_schedule_rport_register(port); | |
1258 | spin_unlock(shost->host_lock); | |
1259 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1260 | } | |
1261 | ||
287ac01a | 1262 | static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) |
1da177e4 | 1263 | { |
287ac01a CS |
1264 | struct zfcp_adapter *adapter = act->adapter; |
1265 | struct zfcp_port *port = act->port; | |
b62a8d9b | 1266 | struct scsi_device *sdev = act->sdev; |
1da177e4 | 1267 | |
287ac01a | 1268 | switch (act->action) { |
b62a8d9b | 1269 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
fdbd1c5e | 1270 | if (!(act->status & ZFCP_STATUS_ERP_NO_REF)) |
b62a8d9b | 1271 | scsi_device_put(sdev); |
6f2ce1c6 | 1272 | zfcp_erp_try_rport_unblock(port); |
287ac01a | 1273 | break; |
1da177e4 | 1274 | |
287ac01a | 1275 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
4eeaa4f3 SM |
1276 | /* This switch case might also happen after a forced reopen |
1277 | * was successfully done and thus overwritten with a new | |
1278 | * non-forced reopen at `ersfs_2'. In this case, we must not | |
1279 | * do the clean-up of the non-forced version. | |
1280 | */ | |
1281 | if (act->step != ZFCP_ERP_STEP_UNINITIALIZED) | |
1282 | if (result == ZFCP_ERP_SUCCEEDED) | |
6f2ce1c6 | 1283 | zfcp_erp_try_rport_unblock(port); |
5767620c CS |
1284 | /* fall through */ |
1285 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
615f59e0 | 1286 | put_device(&port->dev); |
287ac01a CS |
1287 | break; |
1288 | ||
1289 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
a2fa0aed | 1290 | if (result == ZFCP_ERP_SUCCEEDED) { |
bd43a42b | 1291 | register_service_level(&adapter->service_level); |
43f60cbd | 1292 | zfcp_fc_conditional_port_scan(adapter); |
038d9446 | 1293 | queue_work(adapter->work_queue, &adapter->ns_up_work); |
a2fa0aed CS |
1294 | } else |
1295 | unregister_service_level(&adapter->service_level); | |
038d9446 | 1296 | |
f3450c7b | 1297 | kref_put(&adapter->ref, zfcp_adapter_release); |
287ac01a CS |
1298 | break; |
1299 | } | |
1da177e4 LT |
1300 | } |
1301 | ||
287ac01a | 1302 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
1da177e4 | 1303 | { |
287ac01a CS |
1304 | switch (erp_action->action) { |
1305 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1306 | return zfcp_erp_adapter_strategy(erp_action); | |
1307 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1308 | return zfcp_erp_port_forced_strategy(erp_action); | |
1309 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1310 | return zfcp_erp_port_strategy(erp_action); | |
b62a8d9b CS |
1311 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1312 | return zfcp_erp_lun_strategy(erp_action); | |
287ac01a CS |
1313 | } |
1314 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1315 | } |
1316 | ||
287ac01a | 1317 | static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 LT |
1318 | { |
1319 | int retval; | |
287ac01a | 1320 | unsigned long flags; |
ecf0c772 | 1321 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1322 | |
f3450c7b | 1323 | kref_get(&adapter->ref); |
1da177e4 | 1324 | |
f3450c7b | 1325 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 1326 | zfcp_erp_strategy_check_fsfreq(erp_action); |
1da177e4 | 1327 | |
287ac01a CS |
1328 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
1329 | zfcp_erp_action_dequeue(erp_action); | |
1330 | retval = ZFCP_ERP_DISMISSED; | |
1331 | goto unlock; | |
22753fa5 | 1332 | } |
1da177e4 | 1333 | |
9c785d94 CS |
1334 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
1335 | retval = ZFCP_ERP_FAILED; | |
1336 | goto check_target; | |
1337 | } | |
1338 | ||
2f8f3ed5 | 1339 | zfcp_erp_action_to_running(erp_action); |
1da177e4 | 1340 | |
287ac01a | 1341 | /* no lock to allow for blocking operations */ |
ecf0c772 | 1342 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 1343 | retval = zfcp_erp_strategy_do_action(erp_action); |
ecf0c772 | 1344 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 1345 | |
287ac01a CS |
1346 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) |
1347 | retval = ZFCP_ERP_CONTINUES; | |
cc8c2829 | 1348 | |
287ac01a CS |
1349 | switch (retval) { |
1350 | case ZFCP_ERP_NOMEM: | |
1351 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { | |
1352 | ++adapter->erp_low_mem_count; | |
1353 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1354 | } |
287ac01a | 1355 | if (adapter->erp_total_count == adapter->erp_low_mem_count) |
ea4a3a6a | 1356 | _zfcp_erp_adapter_reopen(adapter, 0, "erstgy1"); |
287ac01a CS |
1357 | else { |
1358 | zfcp_erp_strategy_memwait(erp_action); | |
1359 | retval = ZFCP_ERP_CONTINUES; | |
1da177e4 | 1360 | } |
287ac01a | 1361 | goto unlock; |
1da177e4 | 1362 | |
287ac01a CS |
1363 | case ZFCP_ERP_CONTINUES: |
1364 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1365 | --adapter->erp_low_mem_count; | |
1366 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1367 | } |
287ac01a | 1368 | goto unlock; |
1da177e4 LT |
1369 | } |
1370 | ||
9c785d94 | 1371 | check_target: |
287ac01a CS |
1372 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
1373 | zfcp_erp_action_dequeue(erp_action); | |
1374 | retval = zfcp_erp_strategy_statechange(erp_action, retval); | |
1375 | if (retval == ZFCP_ERP_EXIT) | |
1376 | goto unlock; | |
85600f7f CS |
1377 | if (retval == ZFCP_ERP_SUCCEEDED) |
1378 | zfcp_erp_strategy_followup_success(erp_action); | |
1379 | if (retval == ZFCP_ERP_FAILED) | |
1380 | zfcp_erp_strategy_followup_failed(erp_action); | |
1da177e4 | 1381 | |
287ac01a | 1382 | unlock: |
ecf0c772 | 1383 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 | 1384 | |
287ac01a CS |
1385 | if (retval != ZFCP_ERP_CONTINUES) |
1386 | zfcp_erp_action_cleanup(erp_action, retval); | |
1da177e4 | 1387 | |
f3450c7b | 1388 | kref_put(&adapter->ref, zfcp_adapter_release); |
1da177e4 LT |
1389 | return retval; |
1390 | } | |
1391 | ||
287ac01a | 1392 | static int zfcp_erp_thread(void *data) |
1da177e4 | 1393 | { |
287ac01a CS |
1394 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
1395 | struct list_head *next; | |
1396 | struct zfcp_erp_action *act; | |
1397 | unsigned long flags; | |
94ab4b38 | 1398 | |
347c6a96 | 1399 | for (;;) { |
347c6a96 CS |
1400 | wait_event_interruptible(adapter->erp_ready_wq, |
1401 | !list_empty(&adapter->erp_ready_head) || | |
1402 | kthread_should_stop()); | |
94ab4b38 | 1403 | |
347c6a96 CS |
1404 | if (kthread_should_stop()) |
1405 | break; | |
1406 | ||
287ac01a CS |
1407 | write_lock_irqsave(&adapter->erp_lock, flags); |
1408 | next = adapter->erp_ready_head.next; | |
1409 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1da177e4 | 1410 | |
287ac01a CS |
1411 | if (next != &adapter->erp_ready_head) { |
1412 | act = list_entry(next, struct zfcp_erp_action, list); | |
1da177e4 | 1413 | |
287ac01a CS |
1414 | /* there is more to come after dismission, no notify */ |
1415 | if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) | |
1416 | zfcp_erp_wakeup(adapter); | |
1da177e4 | 1417 | } |
1da177e4 LT |
1418 | } |
1419 | ||
287ac01a CS |
1420 | return 0; |
1421 | } | |
1da177e4 | 1422 | |
287ac01a CS |
1423 | /** |
1424 | * zfcp_erp_thread_setup - Start ERP thread for adapter | |
1425 | * @adapter: Adapter to start the ERP thread for | |
1426 | * | |
1427 | * Returns 0 on success or error code from kernel_thread() | |
1428 | */ | |
1429 | int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) | |
1430 | { | |
347c6a96 | 1431 | struct task_struct *thread; |
1da177e4 | 1432 | |
347c6a96 CS |
1433 | thread = kthread_run(zfcp_erp_thread, adapter, "zfcperp%s", |
1434 | dev_name(&adapter->ccw_device->dev)); | |
1435 | if (IS_ERR(thread)) { | |
287ac01a | 1436 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa | 1437 | "Creating an ERP thread for the FCP device failed.\n"); |
347c6a96 | 1438 | return PTR_ERR(thread); |
1da177e4 | 1439 | } |
347c6a96 CS |
1440 | |
1441 | adapter->erp_thread = thread; | |
287ac01a CS |
1442 | return 0; |
1443 | } | |
1da177e4 | 1444 | |
287ac01a CS |
1445 | /** |
1446 | * zfcp_erp_thread_kill - Stop ERP thread. | |
1447 | * @adapter: Adapter where the ERP thread should be stopped. | |
1448 | * | |
1449 | * The caller of this routine ensures that the specified adapter has | |
1450 | * been shut down and that this operation has been completed. Thus, | |
1451 | * there are no pending erp_actions which would need to be handled | |
1452 | * here. | |
1453 | */ | |
1454 | void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) | |
1455 | { | |
347c6a96 CS |
1456 | kthread_stop(adapter->erp_thread); |
1457 | adapter->erp_thread = NULL; | |
143bb6bf CS |
1458 | WARN_ON(!list_empty(&adapter->erp_ready_head)); |
1459 | WARN_ON(!list_empty(&adapter->erp_running_head)); | |
1da177e4 LT |
1460 | } |
1461 | ||
287ac01a | 1462 | /** |
edaed859 SS |
1463 | * zfcp_erp_wait - wait for completion of error recovery on an adapter |
1464 | * @adapter: adapter for which to wait for completion of its error recovery | |
287ac01a | 1465 | */ |
edaed859 | 1466 | void zfcp_erp_wait(struct zfcp_adapter *adapter) |
1da177e4 | 1467 | { |
edaed859 SS |
1468 | wait_event(adapter->erp_done_wqh, |
1469 | !(atomic_read(&adapter->status) & | |
1470 | ZFCP_STATUS_ADAPTER_ERP_PENDING)); | |
287ac01a | 1471 | } |
1da177e4 | 1472 | |
287ac01a | 1473 | /** |
edaed859 SS |
1474 | * zfcp_erp_set_adapter_status - set adapter status bits |
1475 | * @adapter: adapter to change the status | |
1476 | * @mask: status bits to change | |
1477 | * | |
1478 | * Changes in common status bits are propagated to attached ports and LUNs. | |
287ac01a | 1479 | */ |
edaed859 | 1480 | void zfcp_erp_set_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
287ac01a | 1481 | { |
edaed859 SS |
1482 | struct zfcp_port *port; |
1483 | struct scsi_device *sdev; | |
1484 | unsigned long flags; | |
1485 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1da177e4 | 1486 | |
805de8f4 | 1487 | atomic_or(mask, &adapter->status); |
1da177e4 | 1488 | |
edaed859 SS |
1489 | if (!common_mask) |
1490 | return; | |
1491 | ||
1492 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1493 | list_for_each_entry(port, &adapter->port_list, list) | |
805de8f4 | 1494 | atomic_or(common_mask, &port->status); |
edaed859 SS |
1495 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
1496 | ||
924dd584 MP |
1497 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1498 | __shost_for_each_device(sdev, adapter->scsi_host) | |
805de8f4 | 1499 | atomic_or(common_mask, &sdev_to_zfcp(sdev)->status); |
924dd584 | 1500 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
287ac01a | 1501 | } |
1da177e4 | 1502 | |
287ac01a | 1503 | /** |
edaed859 | 1504 | * zfcp_erp_clear_adapter_status - clear adapter status bits |
287ac01a | 1505 | * @adapter: adapter to change the status |
287ac01a | 1506 | * @mask: status bits to change |
287ac01a | 1507 | * |
b62a8d9b | 1508 | * Changes in common status bits are propagated to attached ports and LUNs. |
287ac01a | 1509 | */ |
edaed859 | 1510 | void zfcp_erp_clear_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
1da177e4 | 1511 | { |
1da177e4 | 1512 | struct zfcp_port *port; |
edaed859 | 1513 | struct scsi_device *sdev; |
ecf0c772 | 1514 | unsigned long flags; |
287ac01a | 1515 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
edaed859 | 1516 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; |
1da177e4 | 1517 | |
805de8f4 | 1518 | atomic_andnot(mask, &adapter->status); |
edaed859 SS |
1519 | |
1520 | if (!common_mask) | |
1521 | return; | |
1522 | ||
1523 | if (clear_counter) | |
1524 | atomic_set(&adapter->erp_counter, 0); | |
1525 | ||
1526 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1527 | list_for_each_entry(port, &adapter->port_list, list) { | |
805de8f4 | 1528 | atomic_andnot(common_mask, &port->status); |
edaed859 SS |
1529 | if (clear_counter) |
1530 | atomic_set(&port->erp_counter, 0); | |
287ac01a | 1531 | } |
edaed859 | 1532 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
287ac01a | 1533 | |
924dd584 MP |
1534 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1535 | __shost_for_each_device(sdev, adapter->scsi_host) { | |
805de8f4 | 1536 | atomic_andnot(common_mask, &sdev_to_zfcp(sdev)->status); |
edaed859 SS |
1537 | if (clear_counter) |
1538 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
ecf0c772 | 1539 | } |
924dd584 | 1540 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1541 | } |
1542 | ||
287ac01a | 1543 | /** |
edaed859 SS |
1544 | * zfcp_erp_set_port_status - set port status bits |
1545 | * @port: port to change the status | |
287ac01a | 1546 | * @mask: status bits to change |
287ac01a | 1547 | * |
b62a8d9b | 1548 | * Changes in common status bits are propagated to attached LUNs. |
287ac01a | 1549 | */ |
edaed859 | 1550 | void zfcp_erp_set_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1551 | { |
b62a8d9b | 1552 | struct scsi_device *sdev; |
287ac01a | 1553 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
924dd584 | 1554 | unsigned long flags; |
1da177e4 | 1555 | |
805de8f4 | 1556 | atomic_or(mask, &port->status); |
1da177e4 | 1557 | |
edaed859 SS |
1558 | if (!common_mask) |
1559 | return; | |
1560 | ||
924dd584 MP |
1561 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1562 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1563 | if (sdev_to_zfcp(sdev)->port == port) |
805de8f4 | 1564 | atomic_or(common_mask, |
edaed859 | 1565 | &sdev_to_zfcp(sdev)->status); |
924dd584 | 1566 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1567 | } |
1568 | ||
287ac01a | 1569 | /** |
edaed859 SS |
1570 | * zfcp_erp_clear_port_status - clear port status bits |
1571 | * @port: adapter to change the status | |
287ac01a | 1572 | * @mask: status bits to change |
edaed859 SS |
1573 | * |
1574 | * Changes in common status bits are propagated to attached LUNs. | |
287ac01a | 1575 | */ |
edaed859 | 1576 | void zfcp_erp_clear_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1577 | { |
edaed859 SS |
1578 | struct scsi_device *sdev; |
1579 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1580 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; | |
924dd584 | 1581 | unsigned long flags; |
edaed859 | 1582 | |
805de8f4 | 1583 | atomic_andnot(mask, &port->status); |
edaed859 SS |
1584 | |
1585 | if (!common_mask) | |
1586 | return; | |
b62a8d9b | 1587 | |
edaed859 SS |
1588 | if (clear_counter) |
1589 | atomic_set(&port->erp_counter, 0); | |
1590 | ||
924dd584 MP |
1591 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1592 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1593 | if (sdev_to_zfcp(sdev)->port == port) { |
805de8f4 | 1594 | atomic_andnot(common_mask, |
edaed859 SS |
1595 | &sdev_to_zfcp(sdev)->status); |
1596 | if (clear_counter) | |
1597 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
287ac01a | 1598 | } |
924dd584 | 1599 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1600 | } |
1601 | ||
287ac01a | 1602 | /** |
edaed859 SS |
1603 | * zfcp_erp_set_lun_status - set lun status bits |
1604 | * @sdev: SCSI device / lun to set the status bits | |
1605 | * @mask: status bits to change | |
287ac01a | 1606 | */ |
edaed859 | 1607 | void zfcp_erp_set_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1608 | { |
edaed859 SS |
1609 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1610 | ||
805de8f4 | 1611 | atomic_or(mask, &zfcp_sdev->status); |
d736a27b AH |
1612 | } |
1613 | ||
287ac01a | 1614 | /** |
edaed859 SS |
1615 | * zfcp_erp_clear_lun_status - clear lun status bits |
1616 | * @sdev: SCSi device / lun to clear the status bits | |
1617 | * @mask: status bits to change | |
287ac01a | 1618 | */ |
edaed859 | 1619 | void zfcp_erp_clear_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1620 | { |
edaed859 SS |
1621 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1622 | ||
805de8f4 | 1623 | atomic_andnot(mask, &zfcp_sdev->status); |
edaed859 SS |
1624 | |
1625 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1626 | atomic_set(&zfcp_sdev->erp_counter, 0); | |
d736a27b | 1627 | } |
edaed859 | 1628 |