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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
41fa2ada | 2 | /* |
553448f6 | 3 | * zfcp device driver |
1da177e4 | 4 | * |
553448f6 | 5 | * Error Recovery Procedures (ERP). |
41fa2ada | 6 | * |
6f2ce1c6 | 7 | * Copyright IBM Corp. 2002, 2016 |
1da177e4 LT |
8 | */ |
9 | ||
ecf39d42 CS |
10 | #define KMSG_COMPONENT "zfcp" |
11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
12 | ||
347c6a96 | 13 | #include <linux/kthread.h> |
1da177e4 | 14 | #include "zfcp_ext.h" |
b6bd2fb9 | 15 | #include "zfcp_reqlist.h" |
1da177e4 | 16 | |
287ac01a CS |
17 | #define ZFCP_MAX_ERPS 3 |
18 | ||
19 | enum zfcp_erp_act_flags { | |
20 | ZFCP_STATUS_ERP_TIMEDOUT = 0x10000000, | |
21 | ZFCP_STATUS_ERP_CLOSE_ONLY = 0x01000000, | |
22 | ZFCP_STATUS_ERP_DISMISSING = 0x00100000, | |
23 | ZFCP_STATUS_ERP_DISMISSED = 0x00200000, | |
24 | ZFCP_STATUS_ERP_LOWMEM = 0x00400000, | |
fdbd1c5e | 25 | ZFCP_STATUS_ERP_NO_REF = 0x00800000, |
287ac01a | 26 | }; |
1da177e4 | 27 | |
287ac01a CS |
28 | enum zfcp_erp_steps { |
29 | ZFCP_ERP_STEP_UNINITIALIZED = 0x0000, | |
30 | ZFCP_ERP_STEP_FSF_XCONFIG = 0x0001, | |
31 | ZFCP_ERP_STEP_PHYS_PORT_CLOSING = 0x0010, | |
32 | ZFCP_ERP_STEP_PORT_CLOSING = 0x0100, | |
287ac01a | 33 | ZFCP_ERP_STEP_PORT_OPENING = 0x0800, |
b62a8d9b CS |
34 | ZFCP_ERP_STEP_LUN_CLOSING = 0x1000, |
35 | ZFCP_ERP_STEP_LUN_OPENING = 0x2000, | |
287ac01a CS |
36 | }; |
37 | ||
38 | enum zfcp_erp_act_type { | |
b62a8d9b | 39 | ZFCP_ERP_ACTION_REOPEN_LUN = 1, |
287ac01a CS |
40 | ZFCP_ERP_ACTION_REOPEN_PORT = 2, |
41 | ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3, | |
42 | ZFCP_ERP_ACTION_REOPEN_ADAPTER = 4, | |
43 | }; | |
44 | ||
45 | enum zfcp_erp_act_state { | |
46 | ZFCP_ERP_ACTION_RUNNING = 1, | |
47 | ZFCP_ERP_ACTION_READY = 2, | |
48 | }; | |
49 | ||
50 | enum zfcp_erp_act_result { | |
51 | ZFCP_ERP_SUCCEEDED = 0, | |
52 | ZFCP_ERP_FAILED = 1, | |
53 | ZFCP_ERP_CONTINUES = 2, | |
54 | ZFCP_ERP_EXIT = 3, | |
55 | ZFCP_ERP_DISMISSED = 4, | |
56 | ZFCP_ERP_NOMEM = 5, | |
57 | }; | |
58 | ||
59 | static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask) | |
1da177e4 | 60 | { |
edaed859 SS |
61 | zfcp_erp_clear_adapter_status(adapter, |
62 | ZFCP_STATUS_COMMON_UNBLOCKED | mask); | |
2abbe866 | 63 | } |
1da177e4 | 64 | |
287ac01a | 65 | static int zfcp_erp_action_exists(struct zfcp_erp_action *act) |
2abbe866 | 66 | { |
287ac01a CS |
67 | struct zfcp_erp_action *curr_act; |
68 | ||
69 | list_for_each_entry(curr_act, &act->adapter->erp_running_head, list) | |
70 | if (act == curr_act) | |
71 | return ZFCP_ERP_ACTION_RUNNING; | |
72 | return 0; | |
1da177e4 LT |
73 | } |
74 | ||
287ac01a | 75 | static void zfcp_erp_action_ready(struct zfcp_erp_action *act) |
2abbe866 | 76 | { |
287ac01a CS |
77 | struct zfcp_adapter *adapter = act->adapter; |
78 | ||
79 | list_move(&act->list, &act->adapter->erp_ready_head); | |
ae0904f6 | 80 | zfcp_dbf_rec_run("erardy1", act); |
347c6a96 | 81 | wake_up(&adapter->erp_ready_wq); |
ae0904f6 | 82 | zfcp_dbf_rec_run("erardy2", act); |
2abbe866 AH |
83 | } |
84 | ||
287ac01a | 85 | static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act) |
1da177e4 | 86 | { |
287ac01a CS |
87 | act->status |= ZFCP_STATUS_ERP_DISMISSED; |
88 | if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING) | |
89 | zfcp_erp_action_ready(act); | |
90 | } | |
1da177e4 | 91 | |
b62a8d9b | 92 | static void zfcp_erp_action_dismiss_lun(struct scsi_device *sdev) |
287ac01a | 93 | { |
b62a8d9b CS |
94 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
95 | ||
96 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_INUSE) | |
97 | zfcp_erp_action_dismiss(&zfcp_sdev->erp_action); | |
287ac01a | 98 | } |
1da177e4 | 99 | |
287ac01a CS |
100 | static void zfcp_erp_action_dismiss_port(struct zfcp_port *port) |
101 | { | |
b62a8d9b | 102 | struct scsi_device *sdev; |
1da177e4 | 103 | |
287ac01a CS |
104 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
105 | zfcp_erp_action_dismiss(&port->erp_action); | |
924dd584 MP |
106 | else { |
107 | spin_lock(port->adapter->scsi_host->host_lock); | |
108 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
b62a8d9b CS |
109 | if (sdev_to_zfcp(sdev)->port == port) |
110 | zfcp_erp_action_dismiss_lun(sdev); | |
924dd584 MP |
111 | spin_unlock(port->adapter->scsi_host->host_lock); |
112 | } | |
1da177e4 LT |
113 | } |
114 | ||
287ac01a | 115 | static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter) |
1da177e4 | 116 | { |
287ac01a | 117 | struct zfcp_port *port; |
1da177e4 | 118 | |
287ac01a CS |
119 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE) |
120 | zfcp_erp_action_dismiss(&adapter->erp_action); | |
ecf0c772 SS |
121 | else { |
122 | read_lock(&adapter->port_list_lock); | |
123 | list_for_each_entry(port, &adapter->port_list, list) | |
287ac01a | 124 | zfcp_erp_action_dismiss_port(port); |
ecf0c772 SS |
125 | read_unlock(&adapter->port_list_lock); |
126 | } | |
1da177e4 LT |
127 | } |
128 | ||
287ac01a CS |
129 | static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter, |
130 | struct zfcp_port *port, | |
b62a8d9b | 131 | struct scsi_device *sdev) |
1da177e4 | 132 | { |
287ac01a | 133 | int need = want; |
b62a8d9b CS |
134 | int l_status, p_status, a_status; |
135 | struct zfcp_scsi_dev *zfcp_sdev; | |
1da177e4 | 136 | |
287ac01a | 137 | switch (want) { |
b62a8d9b CS |
138 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
139 | zfcp_sdev = sdev_to_zfcp(sdev); | |
140 | l_status = atomic_read(&zfcp_sdev->status); | |
141 | if (l_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
287ac01a CS |
142 | return 0; |
143 | p_status = atomic_read(&port->status); | |
144 | if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) || | |
145 | p_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
146 | return 0; | |
147 | if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED)) | |
148 | need = ZFCP_ERP_ACTION_REOPEN_PORT; | |
149 | /* fall through */ | |
287ac01a | 150 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
097ef3bd CS |
151 | p_status = atomic_read(&port->status); |
152 | if (!(p_status & ZFCP_STATUS_COMMON_OPEN)) | |
153 | need = ZFCP_ERP_ACTION_REOPEN_PORT; | |
154 | /* fall through */ | |
155 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
287ac01a CS |
156 | p_status = atomic_read(&port->status); |
157 | if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
158 | return 0; | |
159 | a_status = atomic_read(&adapter->status); | |
160 | if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) || | |
161 | a_status & ZFCP_STATUS_COMMON_ERP_FAILED) | |
162 | return 0; | |
d3e1088d SS |
163 | if (p_status & ZFCP_STATUS_COMMON_NOESC) |
164 | return need; | |
287ac01a CS |
165 | if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED)) |
166 | need = ZFCP_ERP_ACTION_REOPEN_ADAPTER; | |
167 | /* fall through */ | |
168 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
169 | a_status = atomic_read(&adapter->status); | |
170 | if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE) | |
171 | return 0; | |
143bb6bf CS |
172 | if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) && |
173 | !(a_status & ZFCP_STATUS_COMMON_OPEN)) | |
174 | return 0; /* shutdown requested for closed adapter */ | |
287ac01a | 175 | } |
1da177e4 | 176 | |
287ac01a | 177 | return need; |
1da177e4 LT |
178 | } |
179 | ||
fdbd1c5e | 180 | static struct zfcp_erp_action *zfcp_erp_setup_act(int need, u32 act_status, |
287ac01a CS |
181 | struct zfcp_adapter *adapter, |
182 | struct zfcp_port *port, | |
b62a8d9b | 183 | struct scsi_device *sdev) |
1da177e4 | 184 | { |
287ac01a | 185 | struct zfcp_erp_action *erp_action; |
b62a8d9b | 186 | struct zfcp_scsi_dev *zfcp_sdev; |
1da177e4 | 187 | |
287ac01a | 188 | switch (need) { |
b62a8d9b CS |
189 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
190 | zfcp_sdev = sdev_to_zfcp(sdev); | |
fdbd1c5e | 191 | if (!(act_status & ZFCP_STATUS_ERP_NO_REF)) |
b62a8d9b | 192 | if (scsi_device_get(sdev)) |
fdbd1c5e | 193 | return NULL; |
805de8f4 | 194 | atomic_or(ZFCP_STATUS_COMMON_ERP_INUSE, |
b62a8d9b CS |
195 | &zfcp_sdev->status); |
196 | erp_action = &zfcp_sdev->erp_action; | |
14718e3c SS |
197 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
198 | erp_action->port = port; | |
199 | erp_action->sdev = sdev; | |
b62a8d9b CS |
200 | if (!(atomic_read(&zfcp_sdev->status) & |
201 | ZFCP_STATUS_COMMON_RUNNING)) | |
fdbd1c5e | 202 | act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY; |
287ac01a | 203 | break; |
1da177e4 | 204 | |
287ac01a CS |
205 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
206 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
615f59e0 | 207 | if (!get_device(&port->dev)) |
6b183334 | 208 | return NULL; |
287ac01a | 209 | zfcp_erp_action_dismiss_port(port); |
805de8f4 | 210 | atomic_or(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status); |
287ac01a | 211 | erp_action = &port->erp_action; |
14718e3c SS |
212 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
213 | erp_action->port = port; | |
287ac01a | 214 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING)) |
fdbd1c5e | 215 | act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY; |
287ac01a | 216 | break; |
1da177e4 | 217 | |
287ac01a | 218 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
f3450c7b | 219 | kref_get(&adapter->ref); |
287ac01a | 220 | zfcp_erp_action_dismiss_adapter(adapter); |
805de8f4 | 221 | atomic_or(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status); |
287ac01a | 222 | erp_action = &adapter->erp_action; |
14718e3c | 223 | memset(erp_action, 0, sizeof(struct zfcp_erp_action)); |
287ac01a CS |
224 | if (!(atomic_read(&adapter->status) & |
225 | ZFCP_STATUS_COMMON_RUNNING)) | |
fdbd1c5e | 226 | act_status |= ZFCP_STATUS_ERP_CLOSE_ONLY; |
287ac01a CS |
227 | break; |
228 | ||
229 | default: | |
230 | return NULL; | |
231 | } | |
1da177e4 | 232 | |
287ac01a | 233 | erp_action->adapter = adapter; |
287ac01a | 234 | erp_action->action = need; |
fdbd1c5e | 235 | erp_action->status = act_status; |
1da177e4 | 236 | |
287ac01a | 237 | return erp_action; |
1da177e4 LT |
238 | } |
239 | ||
287ac01a CS |
240 | static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, |
241 | struct zfcp_port *port, | |
b62a8d9b | 242 | struct scsi_device *sdev, |
ea4a3a6a | 243 | char *id, u32 act_status) |
1da177e4 | 244 | { |
287ac01a | 245 | int retval = 1, need; |
ae0904f6 | 246 | struct zfcp_erp_action *act; |
1da177e4 | 247 | |
347c6a96 | 248 | if (!adapter->erp_thread) |
287ac01a | 249 | return -EIO; |
1da177e4 | 250 | |
b62a8d9b | 251 | need = zfcp_erp_required_act(want, adapter, port, sdev); |
287ac01a | 252 | if (!need) |
1da177e4 | 253 | goto out; |
1da177e4 | 254 | |
b62a8d9b | 255 | act = zfcp_erp_setup_act(need, act_status, adapter, port, sdev); |
287ac01a CS |
256 | if (!act) |
257 | goto out; | |
805de8f4 | 258 | atomic_or(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); |
287ac01a CS |
259 | ++adapter->erp_total_count; |
260 | list_add_tail(&act->list, &adapter->erp_ready_head); | |
347c6a96 | 261 | wake_up(&adapter->erp_ready_wq); |
287ac01a | 262 | retval = 0; |
1da177e4 | 263 | out: |
ae0904f6 | 264 | zfcp_dbf_rec_trig(id, adapter, port, sdev, want, need); |
1da177e4 LT |
265 | return retval; |
266 | } | |
267 | ||
287ac01a | 268 | static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, |
ea4a3a6a | 269 | int clear_mask, char *id) |
287ac01a CS |
270 | { |
271 | zfcp_erp_adapter_block(adapter, clear_mask); | |
a2fa0aed | 272 | zfcp_scsi_schedule_rports_block(adapter); |
287ac01a CS |
273 | |
274 | /* ensure propagation of failed status to new devices */ | |
275 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
edaed859 SS |
276 | zfcp_erp_set_adapter_status(adapter, |
277 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
287ac01a CS |
278 | return -EIO; |
279 | } | |
280 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, | |
ea4a3a6a | 281 | adapter, NULL, NULL, id, 0); |
287ac01a CS |
282 | } |
283 | ||
284 | /** | |
285 | * zfcp_erp_adapter_reopen - Reopen adapter. | |
286 | * @adapter: Adapter to reopen. | |
287 | * @clear: Status flags to clear. | |
288 | * @id: Id for debug trace event. | |
1da177e4 | 289 | */ |
ea4a3a6a | 290 | void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, char *id) |
1da177e4 | 291 | { |
1da177e4 | 292 | unsigned long flags; |
1da177e4 | 293 | |
ecf0c772 SS |
294 | zfcp_erp_adapter_block(adapter, clear); |
295 | zfcp_scsi_schedule_rports_block(adapter); | |
296 | ||
297 | write_lock_irqsave(&adapter->erp_lock, flags); | |
298 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
edaed859 SS |
299 | zfcp_erp_set_adapter_status(adapter, |
300 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ecf0c772 SS |
301 | else |
302 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, adapter, | |
ea4a3a6a | 303 | NULL, NULL, id, 0); |
ecf0c772 | 304 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 305 | } |
1da177e4 | 306 | |
287ac01a CS |
307 | /** |
308 | * zfcp_erp_adapter_shutdown - Shutdown adapter. | |
309 | * @adapter: Adapter to shut down. | |
310 | * @clear: Status flags to clear. | |
311 | * @id: Id for debug trace event. | |
287ac01a CS |
312 | */ |
313 | void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear, | |
ea4a3a6a | 314 | char *id) |
287ac01a CS |
315 | { |
316 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
ea4a3a6a | 317 | zfcp_erp_adapter_reopen(adapter, clear | flags, id); |
1da177e4 LT |
318 | } |
319 | ||
287ac01a CS |
320 | /** |
321 | * zfcp_erp_port_shutdown - Shutdown port | |
322 | * @port: Port to shut down. | |
323 | * @clear: Status flags to clear. | |
324 | * @id: Id for debug trace event. | |
1da177e4 | 325 | */ |
ea4a3a6a | 326 | void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *id) |
1da177e4 | 327 | { |
287ac01a | 328 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; |
ea4a3a6a | 329 | zfcp_erp_port_reopen(port, clear | flags, id); |
287ac01a CS |
330 | } |
331 | ||
287ac01a CS |
332 | static void zfcp_erp_port_block(struct zfcp_port *port, int clear) |
333 | { | |
edaed859 SS |
334 | zfcp_erp_clear_port_status(port, |
335 | ZFCP_STATUS_COMMON_UNBLOCKED | clear); | |
287ac01a CS |
336 | } |
337 | ||
ea4a3a6a SS |
338 | static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, |
339 | char *id) | |
287ac01a CS |
340 | { |
341 | zfcp_erp_port_block(port, clear); | |
a2fa0aed | 342 | zfcp_scsi_schedule_rport_block(port); |
287ac01a CS |
343 | |
344 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
345 | return; | |
1da177e4 | 346 | |
287ac01a | 347 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, |
ea4a3a6a | 348 | port->adapter, port, NULL, id, 0); |
287ac01a CS |
349 | } |
350 | ||
351 | /** | |
352 | * zfcp_erp_port_forced_reopen - Forced close of port and open again | |
353 | * @port: Port to force close and to reopen. | |
ea4a3a6a | 354 | * @clear: Status flags to clear. |
287ac01a | 355 | * @id: Id for debug trace event. |
287ac01a | 356 | */ |
ea4a3a6a | 357 | void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, char *id) |
287ac01a CS |
358 | { |
359 | unsigned long flags; | |
360 | struct zfcp_adapter *adapter = port->adapter; | |
361 | ||
ecf0c772 | 362 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 363 | _zfcp_erp_port_forced_reopen(port, clear, id); |
ecf0c772 | 364 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a CS |
365 | } |
366 | ||
ea4a3a6a | 367 | static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id) |
287ac01a CS |
368 | { |
369 | zfcp_erp_port_block(port, clear); | |
a2fa0aed | 370 | zfcp_scsi_schedule_rport_block(port); |
1da177e4 | 371 | |
287ac01a | 372 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1da177e4 | 373 | /* ensure propagation of failed status to new devices */ |
edaed859 | 374 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
287ac01a | 375 | return -EIO; |
1da177e4 LT |
376 | } |
377 | ||
287ac01a | 378 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, |
ea4a3a6a | 379 | port->adapter, port, NULL, id, 0); |
1da177e4 LT |
380 | } |
381 | ||
382 | /** | |
287ac01a CS |
383 | * zfcp_erp_port_reopen - trigger remote port recovery |
384 | * @port: port to recover | |
385 | * @clear_mask: flags in port status to be cleared | |
ea4a3a6a | 386 | * @id: Id for debug trace event. |
1da177e4 | 387 | * |
287ac01a | 388 | * Returns 0 if recovery has been triggered, < 0 if not. |
1da177e4 | 389 | */ |
ea4a3a6a | 390 | int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id) |
1da177e4 | 391 | { |
287ac01a | 392 | int retval; |
ecf0c772 | 393 | unsigned long flags; |
1da177e4 LT |
394 | struct zfcp_adapter *adapter = port->adapter; |
395 | ||
ecf0c772 | 396 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 397 | retval = _zfcp_erp_port_reopen(port, clear, id); |
ecf0c772 | 398 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
399 | |
400 | return retval; | |
401 | } | |
402 | ||
b62a8d9b | 403 | static void zfcp_erp_lun_block(struct scsi_device *sdev, int clear_mask) |
287ac01a | 404 | { |
edaed859 SS |
405 | zfcp_erp_clear_lun_status(sdev, |
406 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask); | |
287ac01a CS |
407 | } |
408 | ||
b62a8d9b | 409 | static void _zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id, |
ea4a3a6a | 410 | u32 act_status) |
1da177e4 | 411 | { |
b62a8d9b CS |
412 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
413 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
1da177e4 | 414 | |
b62a8d9b | 415 | zfcp_erp_lun_block(sdev, clear); |
1da177e4 | 416 | |
b62a8d9b | 417 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_FAILED) |
287ac01a | 418 | return; |
1da177e4 | 419 | |
b62a8d9b | 420 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_LUN, adapter, |
ea4a3a6a | 421 | zfcp_sdev->port, sdev, id, act_status); |
1da177e4 LT |
422 | } |
423 | ||
424 | /** | |
b62a8d9b CS |
425 | * zfcp_erp_lun_reopen - initiate reopen of a LUN |
426 | * @sdev: SCSI device / LUN to be reopened | |
427 | * @clear_mask: specifies flags in LUN status to be cleared | |
ea4a3a6a SS |
428 | * @id: Id for debug trace event. |
429 | * | |
1da177e4 | 430 | * Return: 0 on success, < 0 on error |
1da177e4 | 431 | */ |
ea4a3a6a | 432 | void zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id) |
1da177e4 | 433 | { |
1da177e4 | 434 | unsigned long flags; |
b62a8d9b CS |
435 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
436 | struct zfcp_port *port = zfcp_sdev->port; | |
287ac01a | 437 | struct zfcp_adapter *adapter = port->adapter; |
1da177e4 | 438 | |
ecf0c772 | 439 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 440 | _zfcp_erp_lun_reopen(sdev, clear, id, 0); |
fdbd1c5e CS |
441 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
442 | } | |
443 | ||
444 | /** | |
b62a8d9b CS |
445 | * zfcp_erp_lun_shutdown - Shutdown LUN |
446 | * @sdev: SCSI device / LUN to shut down. | |
fdbd1c5e CS |
447 | * @clear: Status flags to clear. |
448 | * @id: Id for debug trace event. | |
fdbd1c5e | 449 | */ |
ea4a3a6a | 450 | void zfcp_erp_lun_shutdown(struct scsi_device *sdev, int clear, char *id) |
fdbd1c5e CS |
451 | { |
452 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
ea4a3a6a | 453 | zfcp_erp_lun_reopen(sdev, clear | flags, id); |
fdbd1c5e CS |
454 | } |
455 | ||
456 | /** | |
b62a8d9b CS |
457 | * zfcp_erp_lun_shutdown_wait - Shutdown LUN and wait for erp completion |
458 | * @sdev: SCSI device / LUN to shut down. | |
fdbd1c5e CS |
459 | * @id: Id for debug trace event. |
460 | * | |
b62a8d9b | 461 | * Do not acquire a reference for the LUN when creating the ERP |
fdbd1c5e | 462 | * action. It is safe, because this function waits for the ERP to |
b62a8d9b CS |
463 | * complete first. This allows to shutdown the LUN, even when the SCSI |
464 | * device is in the state SDEV_DEL when scsi_device_get will fail. | |
fdbd1c5e | 465 | */ |
b62a8d9b | 466 | void zfcp_erp_lun_shutdown_wait(struct scsi_device *sdev, char *id) |
fdbd1c5e CS |
467 | { |
468 | unsigned long flags; | |
b62a8d9b CS |
469 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
470 | struct zfcp_port *port = zfcp_sdev->port; | |
fdbd1c5e CS |
471 | struct zfcp_adapter *adapter = port->adapter; |
472 | int clear = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
473 | ||
474 | write_lock_irqsave(&adapter->erp_lock, flags); | |
ea4a3a6a | 475 | _zfcp_erp_lun_reopen(sdev, clear, id, ZFCP_STATUS_ERP_NO_REF); |
ecf0c772 | 476 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
fdbd1c5e CS |
477 | |
478 | zfcp_erp_wait(adapter); | |
1da177e4 LT |
479 | } |
480 | ||
287ac01a | 481 | static int status_change_set(unsigned long mask, atomic_t *status) |
1da177e4 | 482 | { |
287ac01a | 483 | return (atomic_read(status) ^ mask) & mask; |
1da177e4 LT |
484 | } |
485 | ||
287ac01a | 486 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) |
698ec016 | 487 | { |
287ac01a | 488 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) |
ae0904f6 | 489 | zfcp_dbf_rec_run("eraubl1", &adapter->erp_action); |
805de8f4 | 490 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); |
698ec016 MP |
491 | } |
492 | ||
287ac01a | 493 | static void zfcp_erp_port_unblock(struct zfcp_port *port) |
1da177e4 | 494 | { |
287ac01a | 495 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) |
ae0904f6 | 496 | zfcp_dbf_rec_run("erpubl1", &port->erp_action); |
805de8f4 | 497 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); |
1da177e4 LT |
498 | } |
499 | ||
b62a8d9b | 500 | static void zfcp_erp_lun_unblock(struct scsi_device *sdev) |
1da177e4 | 501 | { |
b62a8d9b CS |
502 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
503 | ||
504 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &zfcp_sdev->status)) | |
ae0904f6 | 505 | zfcp_dbf_rec_run("erlubl1", &sdev_to_zfcp(sdev)->erp_action); |
805de8f4 | 506 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &zfcp_sdev->status); |
1da177e4 LT |
507 | } |
508 | ||
287ac01a | 509 | static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) |
1da177e4 | 510 | { |
287ac01a | 511 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); |
ae0904f6 | 512 | zfcp_dbf_rec_run("erator1", erp_action); |
1da177e4 LT |
513 | } |
514 | ||
287ac01a | 515 | static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act) |
1da177e4 | 516 | { |
287ac01a | 517 | struct zfcp_adapter *adapter = act->adapter; |
e60a6d69 | 518 | struct zfcp_fsf_req *req; |
1da177e4 | 519 | |
e60a6d69 | 520 | if (!act->fsf_req_id) |
287ac01a | 521 | return; |
1da177e4 | 522 | |
b6bd2fb9 CS |
523 | spin_lock(&adapter->req_list->lock); |
524 | req = _zfcp_reqlist_find(adapter->req_list, act->fsf_req_id); | |
e60a6d69 | 525 | if (req && req->erp_action == act) { |
287ac01a CS |
526 | if (act->status & (ZFCP_STATUS_ERP_DISMISSED | |
527 | ZFCP_STATUS_ERP_TIMEDOUT)) { | |
e60a6d69 | 528 | req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; |
ae0904f6 | 529 | zfcp_dbf_rec_run("erscf_1", act); |
e60a6d69 | 530 | req->erp_action = NULL; |
1da177e4 | 531 | } |
287ac01a | 532 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
ae0904f6 | 533 | zfcp_dbf_rec_run("erscf_2", act); |
e60a6d69 CS |
534 | if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) |
535 | act->fsf_req_id = 0; | |
287ac01a | 536 | } else |
e60a6d69 | 537 | act->fsf_req_id = 0; |
b6bd2fb9 | 538 | spin_unlock(&adapter->req_list->lock); |
1da177e4 LT |
539 | } |
540 | ||
287ac01a CS |
541 | /** |
542 | * zfcp_erp_notify - Trigger ERP action. | |
543 | * @erp_action: ERP action to continue. | |
544 | * @set_mask: ERP action status flags to set. | |
1da177e4 | 545 | */ |
287ac01a | 546 | void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask) |
1da177e4 | 547 | { |
1da177e4 | 548 | struct zfcp_adapter *adapter = erp_action->adapter; |
287ac01a | 549 | unsigned long flags; |
1da177e4 | 550 | |
287ac01a | 551 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 552 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { |
1da177e4 LT |
553 | erp_action->status |= set_mask; |
554 | zfcp_erp_action_ready(erp_action); | |
1da177e4 | 555 | } |
1da177e4 | 556 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
557 | } |
558 | ||
287ac01a CS |
559 | /** |
560 | * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request | |
561 | * @data: ERP action (from timer data) | |
1da177e4 | 562 | */ |
287ac01a | 563 | void zfcp_erp_timeout_handler(unsigned long data) |
1da177e4 | 564 | { |
287ac01a CS |
565 | struct zfcp_erp_action *act = (struct zfcp_erp_action *) data; |
566 | zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT); | |
1da177e4 LT |
567 | } |
568 | ||
287ac01a | 569 | static void zfcp_erp_memwait_handler(unsigned long data) |
1da177e4 | 570 | { |
287ac01a | 571 | zfcp_erp_notify((struct zfcp_erp_action *)data, 0); |
1da177e4 LT |
572 | } |
573 | ||
287ac01a | 574 | static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) |
1da177e4 | 575 | { |
bc46427e LK |
576 | setup_timer(&erp_action->timer, zfcp_erp_memwait_handler, |
577 | (unsigned long) erp_action); | |
287ac01a CS |
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 | ||
6f2ce1c6 SM |
1207 | /** |
1208 | * zfcp_erp_try_rport_unblock - unblock rport if no more/new recovery | |
1209 | * @port: zfcp_port whose fc_rport we should try to unblock | |
1210 | */ | |
1211 | static void zfcp_erp_try_rport_unblock(struct zfcp_port *port) | |
1212 | { | |
1213 | unsigned long flags; | |
1214 | struct zfcp_adapter *adapter = port->adapter; | |
1215 | int port_status; | |
1216 | struct Scsi_Host *shost = adapter->scsi_host; | |
1217 | struct scsi_device *sdev; | |
1218 | ||
1219 | write_lock_irqsave(&adapter->erp_lock, flags); | |
1220 | port_status = atomic_read(&port->status); | |
1221 | if ((port_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || | |
1222 | (port_status & (ZFCP_STATUS_COMMON_ERP_INUSE | | |
1223 | ZFCP_STATUS_COMMON_ERP_FAILED)) != 0) { | |
1224 | /* new ERP of severity >= port triggered elsewhere meanwhile or | |
1225 | * local link down (adapter erp_failed but not clear unblock) | |
1226 | */ | |
1227 | zfcp_dbf_rec_run_lvl(4, "ertru_p", &port->erp_action); | |
1228 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1229 | return; | |
1230 | } | |
1231 | spin_lock(shost->host_lock); | |
1232 | __shost_for_each_device(sdev, shost) { | |
1233 | struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev); | |
1234 | int lun_status; | |
1235 | ||
1236 | if (zsdev->port != port) | |
1237 | continue; | |
1238 | /* LUN under port of interest */ | |
1239 | lun_status = atomic_read(&zsdev->status); | |
1240 | if ((lun_status & ZFCP_STATUS_COMMON_ERP_FAILED) != 0) | |
1241 | continue; /* unblock rport despite failed LUNs */ | |
1242 | /* LUN recovery not given up yet [maybe follow-up pending] */ | |
1243 | if ((lun_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || | |
1244 | (lun_status & ZFCP_STATUS_COMMON_ERP_INUSE) != 0) { | |
1245 | /* LUN blocked: | |
1246 | * not yet unblocked [LUN recovery pending] | |
1247 | * or meanwhile blocked [new LUN recovery triggered] | |
1248 | */ | |
1249 | zfcp_dbf_rec_run_lvl(4, "ertru_l", &zsdev->erp_action); | |
1250 | spin_unlock(shost->host_lock); | |
1251 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1252 | return; | |
1253 | } | |
1254 | } | |
1255 | /* now port has no child or all children have completed recovery, | |
1256 | * and no ERP of severity >= port was meanwhile triggered elsewhere | |
1257 | */ | |
1258 | zfcp_scsi_schedule_rport_register(port); | |
1259 | spin_unlock(shost->host_lock); | |
1260 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1261 | } | |
1262 | ||
287ac01a | 1263 | static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) |
1da177e4 | 1264 | { |
287ac01a CS |
1265 | struct zfcp_adapter *adapter = act->adapter; |
1266 | struct zfcp_port *port = act->port; | |
b62a8d9b | 1267 | struct scsi_device *sdev = act->sdev; |
1da177e4 | 1268 | |
287ac01a | 1269 | switch (act->action) { |
b62a8d9b | 1270 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
fdbd1c5e | 1271 | if (!(act->status & ZFCP_STATUS_ERP_NO_REF)) |
b62a8d9b | 1272 | scsi_device_put(sdev); |
6f2ce1c6 | 1273 | zfcp_erp_try_rport_unblock(port); |
287ac01a | 1274 | break; |
1da177e4 | 1275 | |
287ac01a | 1276 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
4eeaa4f3 SM |
1277 | /* This switch case might also happen after a forced reopen |
1278 | * was successfully done and thus overwritten with a new | |
1279 | * non-forced reopen at `ersfs_2'. In this case, we must not | |
1280 | * do the clean-up of the non-forced version. | |
1281 | */ | |
1282 | if (act->step != ZFCP_ERP_STEP_UNINITIALIZED) | |
1283 | if (result == ZFCP_ERP_SUCCEEDED) | |
6f2ce1c6 | 1284 | zfcp_erp_try_rport_unblock(port); |
5767620c CS |
1285 | /* fall through */ |
1286 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
615f59e0 | 1287 | put_device(&port->dev); |
287ac01a CS |
1288 | break; |
1289 | ||
1290 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
a2fa0aed | 1291 | if (result == ZFCP_ERP_SUCCEEDED) { |
bd43a42b | 1292 | register_service_level(&adapter->service_level); |
43f60cbd | 1293 | zfcp_fc_conditional_port_scan(adapter); |
038d9446 | 1294 | queue_work(adapter->work_queue, &adapter->ns_up_work); |
a2fa0aed CS |
1295 | } else |
1296 | unregister_service_level(&adapter->service_level); | |
038d9446 | 1297 | |
f3450c7b | 1298 | kref_put(&adapter->ref, zfcp_adapter_release); |
287ac01a CS |
1299 | break; |
1300 | } | |
1da177e4 LT |
1301 | } |
1302 | ||
287ac01a | 1303 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
1da177e4 | 1304 | { |
287ac01a CS |
1305 | switch (erp_action->action) { |
1306 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1307 | return zfcp_erp_adapter_strategy(erp_action); | |
1308 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1309 | return zfcp_erp_port_forced_strategy(erp_action); | |
1310 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1311 | return zfcp_erp_port_strategy(erp_action); | |
b62a8d9b CS |
1312 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1313 | return zfcp_erp_lun_strategy(erp_action); | |
287ac01a CS |
1314 | } |
1315 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1316 | } |
1317 | ||
287ac01a | 1318 | static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 LT |
1319 | { |
1320 | int retval; | |
287ac01a | 1321 | unsigned long flags; |
ecf0c772 | 1322 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1323 | |
f3450c7b | 1324 | kref_get(&adapter->ref); |
1da177e4 | 1325 | |
f3450c7b | 1326 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 1327 | zfcp_erp_strategy_check_fsfreq(erp_action); |
1da177e4 | 1328 | |
287ac01a CS |
1329 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
1330 | zfcp_erp_action_dequeue(erp_action); | |
1331 | retval = ZFCP_ERP_DISMISSED; | |
1332 | goto unlock; | |
22753fa5 | 1333 | } |
1da177e4 | 1334 | |
9c785d94 CS |
1335 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
1336 | retval = ZFCP_ERP_FAILED; | |
1337 | goto check_target; | |
1338 | } | |
1339 | ||
2f8f3ed5 | 1340 | zfcp_erp_action_to_running(erp_action); |
1da177e4 | 1341 | |
287ac01a | 1342 | /* no lock to allow for blocking operations */ |
ecf0c772 | 1343 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 1344 | retval = zfcp_erp_strategy_do_action(erp_action); |
ecf0c772 | 1345 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 1346 | |
287ac01a CS |
1347 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) |
1348 | retval = ZFCP_ERP_CONTINUES; | |
cc8c2829 | 1349 | |
287ac01a CS |
1350 | switch (retval) { |
1351 | case ZFCP_ERP_NOMEM: | |
1352 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { | |
1353 | ++adapter->erp_low_mem_count; | |
1354 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1355 | } |
287ac01a | 1356 | if (adapter->erp_total_count == adapter->erp_low_mem_count) |
ea4a3a6a | 1357 | _zfcp_erp_adapter_reopen(adapter, 0, "erstgy1"); |
287ac01a CS |
1358 | else { |
1359 | zfcp_erp_strategy_memwait(erp_action); | |
1360 | retval = ZFCP_ERP_CONTINUES; | |
1da177e4 | 1361 | } |
287ac01a | 1362 | goto unlock; |
1da177e4 | 1363 | |
287ac01a CS |
1364 | case ZFCP_ERP_CONTINUES: |
1365 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1366 | --adapter->erp_low_mem_count; | |
1367 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1368 | } |
287ac01a | 1369 | goto unlock; |
1da177e4 LT |
1370 | } |
1371 | ||
9c785d94 | 1372 | check_target: |
287ac01a CS |
1373 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
1374 | zfcp_erp_action_dequeue(erp_action); | |
1375 | retval = zfcp_erp_strategy_statechange(erp_action, retval); | |
1376 | if (retval == ZFCP_ERP_EXIT) | |
1377 | goto unlock; | |
85600f7f CS |
1378 | if (retval == ZFCP_ERP_SUCCEEDED) |
1379 | zfcp_erp_strategy_followup_success(erp_action); | |
1380 | if (retval == ZFCP_ERP_FAILED) | |
1381 | zfcp_erp_strategy_followup_failed(erp_action); | |
1da177e4 | 1382 | |
287ac01a | 1383 | unlock: |
ecf0c772 | 1384 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 | 1385 | |
287ac01a CS |
1386 | if (retval != ZFCP_ERP_CONTINUES) |
1387 | zfcp_erp_action_cleanup(erp_action, retval); | |
1da177e4 | 1388 | |
f3450c7b | 1389 | kref_put(&adapter->ref, zfcp_adapter_release); |
1da177e4 LT |
1390 | return retval; |
1391 | } | |
1392 | ||
287ac01a | 1393 | static int zfcp_erp_thread(void *data) |
1da177e4 | 1394 | { |
287ac01a CS |
1395 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
1396 | struct list_head *next; | |
1397 | struct zfcp_erp_action *act; | |
1398 | unsigned long flags; | |
94ab4b38 | 1399 | |
347c6a96 | 1400 | for (;;) { |
347c6a96 CS |
1401 | wait_event_interruptible(adapter->erp_ready_wq, |
1402 | !list_empty(&adapter->erp_ready_head) || | |
1403 | kthread_should_stop()); | |
94ab4b38 | 1404 | |
347c6a96 CS |
1405 | if (kthread_should_stop()) |
1406 | break; | |
1407 | ||
287ac01a CS |
1408 | write_lock_irqsave(&adapter->erp_lock, flags); |
1409 | next = adapter->erp_ready_head.next; | |
1410 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1da177e4 | 1411 | |
287ac01a CS |
1412 | if (next != &adapter->erp_ready_head) { |
1413 | act = list_entry(next, struct zfcp_erp_action, list); | |
1da177e4 | 1414 | |
287ac01a CS |
1415 | /* there is more to come after dismission, no notify */ |
1416 | if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) | |
1417 | zfcp_erp_wakeup(adapter); | |
1da177e4 | 1418 | } |
1da177e4 LT |
1419 | } |
1420 | ||
287ac01a CS |
1421 | return 0; |
1422 | } | |
1da177e4 | 1423 | |
287ac01a CS |
1424 | /** |
1425 | * zfcp_erp_thread_setup - Start ERP thread for adapter | |
1426 | * @adapter: Adapter to start the ERP thread for | |
1427 | * | |
1428 | * Returns 0 on success or error code from kernel_thread() | |
1429 | */ | |
1430 | int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) | |
1431 | { | |
347c6a96 | 1432 | struct task_struct *thread; |
1da177e4 | 1433 | |
347c6a96 CS |
1434 | thread = kthread_run(zfcp_erp_thread, adapter, "zfcperp%s", |
1435 | dev_name(&adapter->ccw_device->dev)); | |
1436 | if (IS_ERR(thread)) { | |
287ac01a | 1437 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa | 1438 | "Creating an ERP thread for the FCP device failed.\n"); |
347c6a96 | 1439 | return PTR_ERR(thread); |
1da177e4 | 1440 | } |
347c6a96 CS |
1441 | |
1442 | adapter->erp_thread = thread; | |
287ac01a CS |
1443 | return 0; |
1444 | } | |
1da177e4 | 1445 | |
287ac01a CS |
1446 | /** |
1447 | * zfcp_erp_thread_kill - Stop ERP thread. | |
1448 | * @adapter: Adapter where the ERP thread should be stopped. | |
1449 | * | |
1450 | * The caller of this routine ensures that the specified adapter has | |
1451 | * been shut down and that this operation has been completed. Thus, | |
1452 | * there are no pending erp_actions which would need to be handled | |
1453 | * here. | |
1454 | */ | |
1455 | void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) | |
1456 | { | |
347c6a96 CS |
1457 | kthread_stop(adapter->erp_thread); |
1458 | adapter->erp_thread = NULL; | |
143bb6bf CS |
1459 | WARN_ON(!list_empty(&adapter->erp_ready_head)); |
1460 | WARN_ON(!list_empty(&adapter->erp_running_head)); | |
1da177e4 LT |
1461 | } |
1462 | ||
287ac01a | 1463 | /** |
edaed859 SS |
1464 | * zfcp_erp_wait - wait for completion of error recovery on an adapter |
1465 | * @adapter: adapter for which to wait for completion of its error recovery | |
287ac01a | 1466 | */ |
edaed859 | 1467 | void zfcp_erp_wait(struct zfcp_adapter *adapter) |
1da177e4 | 1468 | { |
edaed859 SS |
1469 | wait_event(adapter->erp_done_wqh, |
1470 | !(atomic_read(&adapter->status) & | |
1471 | ZFCP_STATUS_ADAPTER_ERP_PENDING)); | |
287ac01a | 1472 | } |
1da177e4 | 1473 | |
287ac01a | 1474 | /** |
edaed859 SS |
1475 | * zfcp_erp_set_adapter_status - set adapter status bits |
1476 | * @adapter: adapter to change the status | |
1477 | * @mask: status bits to change | |
1478 | * | |
1479 | * Changes in common status bits are propagated to attached ports and LUNs. | |
287ac01a | 1480 | */ |
edaed859 | 1481 | void zfcp_erp_set_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
287ac01a | 1482 | { |
edaed859 SS |
1483 | struct zfcp_port *port; |
1484 | struct scsi_device *sdev; | |
1485 | unsigned long flags; | |
1486 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1da177e4 | 1487 | |
805de8f4 | 1488 | atomic_or(mask, &adapter->status); |
1da177e4 | 1489 | |
edaed859 SS |
1490 | if (!common_mask) |
1491 | return; | |
1492 | ||
1493 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1494 | list_for_each_entry(port, &adapter->port_list, list) | |
805de8f4 | 1495 | atomic_or(common_mask, &port->status); |
edaed859 SS |
1496 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
1497 | ||
924dd584 MP |
1498 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1499 | __shost_for_each_device(sdev, adapter->scsi_host) | |
805de8f4 | 1500 | atomic_or(common_mask, &sdev_to_zfcp(sdev)->status); |
924dd584 | 1501 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
287ac01a | 1502 | } |
1da177e4 | 1503 | |
287ac01a | 1504 | /** |
edaed859 | 1505 | * zfcp_erp_clear_adapter_status - clear adapter status bits |
287ac01a | 1506 | * @adapter: adapter to change the status |
287ac01a | 1507 | * @mask: status bits to change |
287ac01a | 1508 | * |
b62a8d9b | 1509 | * Changes in common status bits are propagated to attached ports and LUNs. |
287ac01a | 1510 | */ |
edaed859 | 1511 | void zfcp_erp_clear_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
1da177e4 | 1512 | { |
1da177e4 | 1513 | struct zfcp_port *port; |
edaed859 | 1514 | struct scsi_device *sdev; |
ecf0c772 | 1515 | unsigned long flags; |
287ac01a | 1516 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
edaed859 | 1517 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; |
1da177e4 | 1518 | |
805de8f4 | 1519 | atomic_andnot(mask, &adapter->status); |
edaed859 SS |
1520 | |
1521 | if (!common_mask) | |
1522 | return; | |
1523 | ||
1524 | if (clear_counter) | |
1525 | atomic_set(&adapter->erp_counter, 0); | |
1526 | ||
1527 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1528 | list_for_each_entry(port, &adapter->port_list, list) { | |
805de8f4 | 1529 | atomic_andnot(common_mask, &port->status); |
edaed859 SS |
1530 | if (clear_counter) |
1531 | atomic_set(&port->erp_counter, 0); | |
287ac01a | 1532 | } |
edaed859 | 1533 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
287ac01a | 1534 | |
924dd584 MP |
1535 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1536 | __shost_for_each_device(sdev, adapter->scsi_host) { | |
805de8f4 | 1537 | atomic_andnot(common_mask, &sdev_to_zfcp(sdev)->status); |
edaed859 SS |
1538 | if (clear_counter) |
1539 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
ecf0c772 | 1540 | } |
924dd584 | 1541 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1542 | } |
1543 | ||
287ac01a | 1544 | /** |
edaed859 SS |
1545 | * zfcp_erp_set_port_status - set port status bits |
1546 | * @port: port to change the status | |
287ac01a | 1547 | * @mask: status bits to change |
287ac01a | 1548 | * |
b62a8d9b | 1549 | * Changes in common status bits are propagated to attached LUNs. |
287ac01a | 1550 | */ |
edaed859 | 1551 | void zfcp_erp_set_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1552 | { |
b62a8d9b | 1553 | struct scsi_device *sdev; |
287ac01a | 1554 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
924dd584 | 1555 | unsigned long flags; |
1da177e4 | 1556 | |
805de8f4 | 1557 | atomic_or(mask, &port->status); |
1da177e4 | 1558 | |
edaed859 SS |
1559 | if (!common_mask) |
1560 | return; | |
1561 | ||
924dd584 MP |
1562 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1563 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1564 | if (sdev_to_zfcp(sdev)->port == port) |
805de8f4 | 1565 | atomic_or(common_mask, |
edaed859 | 1566 | &sdev_to_zfcp(sdev)->status); |
924dd584 | 1567 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1568 | } |
1569 | ||
287ac01a | 1570 | /** |
edaed859 SS |
1571 | * zfcp_erp_clear_port_status - clear port status bits |
1572 | * @port: adapter to change the status | |
287ac01a | 1573 | * @mask: status bits to change |
edaed859 SS |
1574 | * |
1575 | * Changes in common status bits are propagated to attached LUNs. | |
287ac01a | 1576 | */ |
edaed859 | 1577 | void zfcp_erp_clear_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1578 | { |
edaed859 SS |
1579 | struct scsi_device *sdev; |
1580 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1581 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; | |
924dd584 | 1582 | unsigned long flags; |
edaed859 | 1583 | |
805de8f4 | 1584 | atomic_andnot(mask, &port->status); |
edaed859 SS |
1585 | |
1586 | if (!common_mask) | |
1587 | return; | |
b62a8d9b | 1588 | |
edaed859 SS |
1589 | if (clear_counter) |
1590 | atomic_set(&port->erp_counter, 0); | |
1591 | ||
924dd584 MP |
1592 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1593 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1594 | if (sdev_to_zfcp(sdev)->port == port) { |
805de8f4 | 1595 | atomic_andnot(common_mask, |
edaed859 SS |
1596 | &sdev_to_zfcp(sdev)->status); |
1597 | if (clear_counter) | |
1598 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
287ac01a | 1599 | } |
924dd584 | 1600 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1601 | } |
1602 | ||
287ac01a | 1603 | /** |
edaed859 SS |
1604 | * zfcp_erp_set_lun_status - set lun status bits |
1605 | * @sdev: SCSI device / lun to set the status bits | |
1606 | * @mask: status bits to change | |
287ac01a | 1607 | */ |
edaed859 | 1608 | void zfcp_erp_set_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1609 | { |
edaed859 SS |
1610 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1611 | ||
805de8f4 | 1612 | atomic_or(mask, &zfcp_sdev->status); |
d736a27b AH |
1613 | } |
1614 | ||
287ac01a | 1615 | /** |
edaed859 SS |
1616 | * zfcp_erp_clear_lun_status - clear lun status bits |
1617 | * @sdev: SCSi device / lun to clear the status bits | |
1618 | * @mask: status bits to change | |
287ac01a | 1619 | */ |
edaed859 | 1620 | void zfcp_erp_clear_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1621 | { |
edaed859 SS |
1622 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1623 | ||
805de8f4 | 1624 | atomic_andnot(mask, &zfcp_sdev->status); |
edaed859 SS |
1625 | |
1626 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1627 | atomic_set(&zfcp_sdev->erp_counter, 0); | |
d736a27b | 1628 | } |
edaed859 | 1629 |