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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; | |
ab31fd0c SM |
197 | WARN_ON_ONCE(erp_action->port != port); |
198 | WARN_ON_ONCE(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; |
ab31fd0c SM |
211 | WARN_ON_ONCE(erp_action->port != port); |
212 | WARN_ON_ONCE(erp_action->sdev != NULL); | |
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; |
ab31fd0c SM |
222 | WARN_ON_ONCE(erp_action->port != NULL); |
223 | WARN_ON_ONCE(erp_action->sdev != NULL); | |
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 | |
ab31fd0c SM |
233 | WARN_ON_ONCE(erp_action->adapter != adapter); |
234 | memset(&erp_action->list, 0, sizeof(erp_action->list)); | |
235 | memset(&erp_action->timer, 0, sizeof(erp_action->timer)); | |
236 | erp_action->step = ZFCP_ERP_STEP_UNINITIALIZED; | |
237 | erp_action->fsf_req_id = 0; | |
287ac01a | 238 | erp_action->action = need; |
fdbd1c5e | 239 | erp_action->status = act_status; |
1da177e4 | 240 | |
287ac01a | 241 | return erp_action; |
1da177e4 LT |
242 | } |
243 | ||
287ac01a CS |
244 | static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter, |
245 | struct zfcp_port *port, | |
b62a8d9b | 246 | struct scsi_device *sdev, |
ea4a3a6a | 247 | char *id, u32 act_status) |
1da177e4 | 248 | { |
287ac01a | 249 | int retval = 1, need; |
ae0904f6 | 250 | struct zfcp_erp_action *act; |
1da177e4 | 251 | |
347c6a96 | 252 | if (!adapter->erp_thread) |
287ac01a | 253 | return -EIO; |
1da177e4 | 254 | |
b62a8d9b | 255 | need = zfcp_erp_required_act(want, adapter, port, sdev); |
287ac01a | 256 | if (!need) |
1da177e4 | 257 | goto out; |
1da177e4 | 258 | |
b62a8d9b | 259 | act = zfcp_erp_setup_act(need, act_status, adapter, port, sdev); |
287ac01a CS |
260 | if (!act) |
261 | goto out; | |
805de8f4 | 262 | atomic_or(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status); |
287ac01a CS |
263 | ++adapter->erp_total_count; |
264 | list_add_tail(&act->list, &adapter->erp_ready_head); | |
347c6a96 | 265 | wake_up(&adapter->erp_ready_wq); |
287ac01a | 266 | retval = 0; |
1da177e4 | 267 | out: |
ae0904f6 | 268 | zfcp_dbf_rec_trig(id, adapter, port, sdev, want, need); |
1da177e4 LT |
269 | return retval; |
270 | } | |
271 | ||
287ac01a | 272 | static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, |
ea4a3a6a | 273 | int clear_mask, char *id) |
287ac01a CS |
274 | { |
275 | zfcp_erp_adapter_block(adapter, clear_mask); | |
a2fa0aed | 276 | zfcp_scsi_schedule_rports_block(adapter); |
287ac01a CS |
277 | |
278 | /* ensure propagation of failed status to new devices */ | |
279 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { | |
edaed859 SS |
280 | zfcp_erp_set_adapter_status(adapter, |
281 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
287ac01a CS |
282 | return -EIO; |
283 | } | |
284 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, | |
ea4a3a6a | 285 | adapter, NULL, NULL, id, 0); |
287ac01a CS |
286 | } |
287 | ||
288 | /** | |
289 | * zfcp_erp_adapter_reopen - Reopen adapter. | |
290 | * @adapter: Adapter to reopen. | |
291 | * @clear: Status flags to clear. | |
292 | * @id: Id for debug trace event. | |
1da177e4 | 293 | */ |
ea4a3a6a | 294 | void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear, char *id) |
1da177e4 | 295 | { |
1da177e4 | 296 | unsigned long flags; |
1da177e4 | 297 | |
ecf0c772 SS |
298 | zfcp_erp_adapter_block(adapter, clear); |
299 | zfcp_scsi_schedule_rports_block(adapter); | |
300 | ||
301 | write_lock_irqsave(&adapter->erp_lock, flags); | |
302 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
edaed859 SS |
303 | zfcp_erp_set_adapter_status(adapter, |
304 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ecf0c772 SS |
305 | else |
306 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER, adapter, | |
ea4a3a6a | 307 | NULL, NULL, id, 0); |
ecf0c772 | 308 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 309 | } |
1da177e4 | 310 | |
287ac01a CS |
311 | /** |
312 | * zfcp_erp_adapter_shutdown - Shutdown adapter. | |
313 | * @adapter: Adapter to shut down. | |
314 | * @clear: Status flags to clear. | |
315 | * @id: Id for debug trace event. | |
287ac01a CS |
316 | */ |
317 | void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear, | |
ea4a3a6a | 318 | char *id) |
287ac01a CS |
319 | { |
320 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
ea4a3a6a | 321 | zfcp_erp_adapter_reopen(adapter, clear | flags, id); |
1da177e4 LT |
322 | } |
323 | ||
287ac01a CS |
324 | /** |
325 | * zfcp_erp_port_shutdown - Shutdown port | |
326 | * @port: Port to shut down. | |
327 | * @clear: Status flags to clear. | |
328 | * @id: Id for debug trace event. | |
1da177e4 | 329 | */ |
ea4a3a6a | 330 | void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, char *id) |
1da177e4 | 331 | { |
287ac01a | 332 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; |
ea4a3a6a | 333 | zfcp_erp_port_reopen(port, clear | flags, id); |
287ac01a CS |
334 | } |
335 | ||
287ac01a CS |
336 | static void zfcp_erp_port_block(struct zfcp_port *port, int clear) |
337 | { | |
edaed859 SS |
338 | zfcp_erp_clear_port_status(port, |
339 | ZFCP_STATUS_COMMON_UNBLOCKED | clear); | |
287ac01a CS |
340 | } |
341 | ||
ea4a3a6a SS |
342 | static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, |
343 | char *id) | |
287ac01a CS |
344 | { |
345 | zfcp_erp_port_block(port, clear); | |
a2fa0aed | 346 | zfcp_scsi_schedule_rport_block(port); |
287ac01a CS |
347 | |
348 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) | |
349 | return; | |
1da177e4 | 350 | |
287ac01a | 351 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED, |
ea4a3a6a | 352 | port->adapter, port, NULL, id, 0); |
287ac01a CS |
353 | } |
354 | ||
355 | /** | |
356 | * zfcp_erp_port_forced_reopen - Forced close of port and open again | |
357 | * @port: Port to force close and to reopen. | |
ea4a3a6a | 358 | * @clear: Status flags to clear. |
287ac01a | 359 | * @id: Id for debug trace event. |
287ac01a | 360 | */ |
ea4a3a6a | 361 | void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, char *id) |
287ac01a CS |
362 | { |
363 | unsigned long flags; | |
364 | struct zfcp_adapter *adapter = port->adapter; | |
365 | ||
ecf0c772 | 366 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 367 | _zfcp_erp_port_forced_reopen(port, clear, id); |
ecf0c772 | 368 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a CS |
369 | } |
370 | ||
ea4a3a6a | 371 | static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id) |
287ac01a CS |
372 | { |
373 | zfcp_erp_port_block(port, clear); | |
a2fa0aed | 374 | zfcp_scsi_schedule_rport_block(port); |
1da177e4 | 375 | |
287ac01a | 376 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1da177e4 | 377 | /* ensure propagation of failed status to new devices */ |
edaed859 | 378 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
287ac01a | 379 | return -EIO; |
1da177e4 LT |
380 | } |
381 | ||
287ac01a | 382 | return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT, |
ea4a3a6a | 383 | port->adapter, port, NULL, id, 0); |
1da177e4 LT |
384 | } |
385 | ||
386 | /** | |
287ac01a CS |
387 | * zfcp_erp_port_reopen - trigger remote port recovery |
388 | * @port: port to recover | |
389 | * @clear_mask: flags in port status to be cleared | |
ea4a3a6a | 390 | * @id: Id for debug trace event. |
1da177e4 | 391 | * |
287ac01a | 392 | * Returns 0 if recovery has been triggered, < 0 if not. |
1da177e4 | 393 | */ |
ea4a3a6a | 394 | int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, char *id) |
1da177e4 | 395 | { |
287ac01a | 396 | int retval; |
ecf0c772 | 397 | unsigned long flags; |
1da177e4 LT |
398 | struct zfcp_adapter *adapter = port->adapter; |
399 | ||
ecf0c772 | 400 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 401 | retval = _zfcp_erp_port_reopen(port, clear, id); |
ecf0c772 | 402 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
403 | |
404 | return retval; | |
405 | } | |
406 | ||
b62a8d9b | 407 | static void zfcp_erp_lun_block(struct scsi_device *sdev, int clear_mask) |
287ac01a | 408 | { |
edaed859 SS |
409 | zfcp_erp_clear_lun_status(sdev, |
410 | ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask); | |
287ac01a CS |
411 | } |
412 | ||
b62a8d9b | 413 | static void _zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id, |
ea4a3a6a | 414 | u32 act_status) |
1da177e4 | 415 | { |
b62a8d9b CS |
416 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
417 | struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; | |
1da177e4 | 418 | |
b62a8d9b | 419 | zfcp_erp_lun_block(sdev, clear); |
1da177e4 | 420 | |
b62a8d9b | 421 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_FAILED) |
287ac01a | 422 | return; |
1da177e4 | 423 | |
b62a8d9b | 424 | zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_LUN, adapter, |
ea4a3a6a | 425 | zfcp_sdev->port, sdev, id, act_status); |
1da177e4 LT |
426 | } |
427 | ||
428 | /** | |
b62a8d9b CS |
429 | * zfcp_erp_lun_reopen - initiate reopen of a LUN |
430 | * @sdev: SCSI device / LUN to be reopened | |
431 | * @clear_mask: specifies flags in LUN status to be cleared | |
ea4a3a6a SS |
432 | * @id: Id for debug trace event. |
433 | * | |
1da177e4 | 434 | * Return: 0 on success, < 0 on error |
1da177e4 | 435 | */ |
ea4a3a6a | 436 | void zfcp_erp_lun_reopen(struct scsi_device *sdev, int clear, char *id) |
1da177e4 | 437 | { |
1da177e4 | 438 | unsigned long flags; |
b62a8d9b CS |
439 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
440 | struct zfcp_port *port = zfcp_sdev->port; | |
287ac01a | 441 | struct zfcp_adapter *adapter = port->adapter; |
1da177e4 | 442 | |
ecf0c772 | 443 | write_lock_irqsave(&adapter->erp_lock, flags); |
ea4a3a6a | 444 | _zfcp_erp_lun_reopen(sdev, clear, id, 0); |
fdbd1c5e CS |
445 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
446 | } | |
447 | ||
448 | /** | |
b62a8d9b CS |
449 | * zfcp_erp_lun_shutdown - Shutdown LUN |
450 | * @sdev: SCSI device / LUN to shut down. | |
fdbd1c5e CS |
451 | * @clear: Status flags to clear. |
452 | * @id: Id for debug trace event. | |
fdbd1c5e | 453 | */ |
ea4a3a6a | 454 | void zfcp_erp_lun_shutdown(struct scsi_device *sdev, int clear, char *id) |
fdbd1c5e CS |
455 | { |
456 | int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
ea4a3a6a | 457 | zfcp_erp_lun_reopen(sdev, clear | flags, id); |
fdbd1c5e CS |
458 | } |
459 | ||
460 | /** | |
b62a8d9b CS |
461 | * zfcp_erp_lun_shutdown_wait - Shutdown LUN and wait for erp completion |
462 | * @sdev: SCSI device / LUN to shut down. | |
fdbd1c5e CS |
463 | * @id: Id for debug trace event. |
464 | * | |
b62a8d9b | 465 | * Do not acquire a reference for the LUN when creating the ERP |
fdbd1c5e | 466 | * action. It is safe, because this function waits for the ERP to |
b62a8d9b CS |
467 | * complete first. This allows to shutdown the LUN, even when the SCSI |
468 | * device is in the state SDEV_DEL when scsi_device_get will fail. | |
fdbd1c5e | 469 | */ |
b62a8d9b | 470 | void zfcp_erp_lun_shutdown_wait(struct scsi_device *sdev, char *id) |
fdbd1c5e CS |
471 | { |
472 | unsigned long flags; | |
b62a8d9b CS |
473 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
474 | struct zfcp_port *port = zfcp_sdev->port; | |
fdbd1c5e CS |
475 | struct zfcp_adapter *adapter = port->adapter; |
476 | int clear = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED; | |
477 | ||
478 | write_lock_irqsave(&adapter->erp_lock, flags); | |
ea4a3a6a | 479 | _zfcp_erp_lun_reopen(sdev, clear, id, ZFCP_STATUS_ERP_NO_REF); |
ecf0c772 | 480 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
fdbd1c5e CS |
481 | |
482 | zfcp_erp_wait(adapter); | |
1da177e4 LT |
483 | } |
484 | ||
287ac01a | 485 | static int status_change_set(unsigned long mask, atomic_t *status) |
1da177e4 | 486 | { |
287ac01a | 487 | return (atomic_read(status) ^ mask) & mask; |
1da177e4 LT |
488 | } |
489 | ||
287ac01a | 490 | static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter) |
698ec016 | 491 | { |
287ac01a | 492 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status)) |
ae0904f6 | 493 | zfcp_dbf_rec_run("eraubl1", &adapter->erp_action); |
805de8f4 | 494 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status); |
698ec016 MP |
495 | } |
496 | ||
287ac01a | 497 | static void zfcp_erp_port_unblock(struct zfcp_port *port) |
1da177e4 | 498 | { |
287ac01a | 499 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status)) |
ae0904f6 | 500 | zfcp_dbf_rec_run("erpubl1", &port->erp_action); |
805de8f4 | 501 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status); |
1da177e4 LT |
502 | } |
503 | ||
b62a8d9b | 504 | static void zfcp_erp_lun_unblock(struct scsi_device *sdev) |
1da177e4 | 505 | { |
b62a8d9b CS |
506 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
507 | ||
508 | if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &zfcp_sdev->status)) | |
ae0904f6 | 509 | zfcp_dbf_rec_run("erlubl1", &sdev_to_zfcp(sdev)->erp_action); |
805de8f4 | 510 | atomic_or(ZFCP_STATUS_COMMON_UNBLOCKED, &zfcp_sdev->status); |
1da177e4 LT |
511 | } |
512 | ||
287ac01a | 513 | static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action) |
1da177e4 | 514 | { |
287ac01a | 515 | list_move(&erp_action->list, &erp_action->adapter->erp_running_head); |
ae0904f6 | 516 | zfcp_dbf_rec_run("erator1", erp_action); |
1da177e4 LT |
517 | } |
518 | ||
287ac01a | 519 | static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act) |
1da177e4 | 520 | { |
287ac01a | 521 | struct zfcp_adapter *adapter = act->adapter; |
e60a6d69 | 522 | struct zfcp_fsf_req *req; |
1da177e4 | 523 | |
e60a6d69 | 524 | if (!act->fsf_req_id) |
287ac01a | 525 | return; |
1da177e4 | 526 | |
b6bd2fb9 CS |
527 | spin_lock(&adapter->req_list->lock); |
528 | req = _zfcp_reqlist_find(adapter->req_list, act->fsf_req_id); | |
e60a6d69 | 529 | if (req && req->erp_action == act) { |
287ac01a CS |
530 | if (act->status & (ZFCP_STATUS_ERP_DISMISSED | |
531 | ZFCP_STATUS_ERP_TIMEDOUT)) { | |
e60a6d69 | 532 | req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; |
ae0904f6 | 533 | zfcp_dbf_rec_run("erscf_1", act); |
e60a6d69 | 534 | req->erp_action = NULL; |
1da177e4 | 535 | } |
287ac01a | 536 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
ae0904f6 | 537 | zfcp_dbf_rec_run("erscf_2", act); |
e60a6d69 CS |
538 | if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) |
539 | act->fsf_req_id = 0; | |
287ac01a | 540 | } else |
e60a6d69 | 541 | act->fsf_req_id = 0; |
b6bd2fb9 | 542 | spin_unlock(&adapter->req_list->lock); |
1da177e4 LT |
543 | } |
544 | ||
287ac01a CS |
545 | /** |
546 | * zfcp_erp_notify - Trigger ERP action. | |
547 | * @erp_action: ERP action to continue. | |
548 | * @set_mask: ERP action status flags to set. | |
1da177e4 | 549 | */ |
287ac01a | 550 | void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask) |
1da177e4 | 551 | { |
1da177e4 | 552 | struct zfcp_adapter *adapter = erp_action->adapter; |
287ac01a | 553 | unsigned long flags; |
1da177e4 | 554 | |
287ac01a | 555 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 556 | if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) { |
1da177e4 LT |
557 | erp_action->status |= set_mask; |
558 | zfcp_erp_action_ready(erp_action); | |
1da177e4 | 559 | } |
1da177e4 | 560 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 LT |
561 | } |
562 | ||
287ac01a CS |
563 | /** |
564 | * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request | |
565 | * @data: ERP action (from timer data) | |
1da177e4 | 566 | */ |
287ac01a | 567 | void zfcp_erp_timeout_handler(unsigned long data) |
1da177e4 | 568 | { |
287ac01a CS |
569 | struct zfcp_erp_action *act = (struct zfcp_erp_action *) data; |
570 | zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT); | |
1da177e4 LT |
571 | } |
572 | ||
287ac01a | 573 | static void zfcp_erp_memwait_handler(unsigned long data) |
1da177e4 | 574 | { |
287ac01a | 575 | zfcp_erp_notify((struct zfcp_erp_action *)data, 0); |
1da177e4 LT |
576 | } |
577 | ||
287ac01a | 578 | static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action) |
1da177e4 | 579 | { |
bc46427e LK |
580 | setup_timer(&erp_action->timer, zfcp_erp_memwait_handler, |
581 | (unsigned long) erp_action); | |
287ac01a CS |
582 | erp_action->timer.expires = jiffies + HZ; |
583 | add_timer(&erp_action->timer); | |
1da177e4 LT |
584 | } |
585 | ||
287ac01a | 586 | static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, |
ea4a3a6a | 587 | int clear, char *id) |
1da177e4 | 588 | { |
287ac01a | 589 | struct zfcp_port *port; |
1da177e4 | 590 | |
ecf0c772 SS |
591 | read_lock(&adapter->port_list_lock); |
592 | list_for_each_entry(port, &adapter->port_list, list) | |
ea4a3a6a | 593 | _zfcp_erp_port_reopen(port, clear, id); |
ecf0c772 | 594 | read_unlock(&adapter->port_list_lock); |
1da177e4 LT |
595 | } |
596 | ||
b62a8d9b | 597 | static void _zfcp_erp_lun_reopen_all(struct zfcp_port *port, int clear, |
ea4a3a6a | 598 | char *id) |
1da177e4 | 599 | { |
b62a8d9b | 600 | struct scsi_device *sdev; |
1da177e4 | 601 | |
924dd584 MP |
602 | spin_lock(port->adapter->scsi_host->host_lock); |
603 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
b62a8d9b | 604 | if (sdev_to_zfcp(sdev)->port == port) |
ea4a3a6a | 605 | _zfcp_erp_lun_reopen(sdev, clear, id, 0); |
924dd584 | 606 | spin_unlock(port->adapter->scsi_host->host_lock); |
1da177e4 LT |
607 | } |
608 | ||
85600f7f | 609 | static void zfcp_erp_strategy_followup_failed(struct zfcp_erp_action *act) |
1da177e4 | 610 | { |
287ac01a | 611 | switch (act->action) { |
287ac01a | 612 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
ea4a3a6a | 613 | _zfcp_erp_adapter_reopen(act->adapter, 0, "ersff_1"); |
287ac01a | 614 | break; |
287ac01a | 615 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
ea4a3a6a | 616 | _zfcp_erp_port_forced_reopen(act->port, 0, "ersff_2"); |
287ac01a | 617 | break; |
287ac01a | 618 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
ea4a3a6a | 619 | _zfcp_erp_port_reopen(act->port, 0, "ersff_3"); |
287ac01a | 620 | break; |
b62a8d9b | 621 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
ea4a3a6a | 622 | _zfcp_erp_lun_reopen(act->sdev, 0, "ersff_4", 0); |
85600f7f CS |
623 | break; |
624 | } | |
625 | } | |
626 | ||
627 | static void zfcp_erp_strategy_followup_success(struct zfcp_erp_action *act) | |
628 | { | |
629 | switch (act->action) { | |
630 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
ea4a3a6a | 631 | _zfcp_erp_port_reopen_all(act->adapter, 0, "ersfs_1"); |
85600f7f CS |
632 | break; |
633 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
ea4a3a6a | 634 | _zfcp_erp_port_reopen(act->port, 0, "ersfs_2"); |
85600f7f CS |
635 | break; |
636 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
ea4a3a6a | 637 | _zfcp_erp_lun_reopen_all(act->port, 0, "ersfs_3"); |
287ac01a | 638 | break; |
1da177e4 | 639 | } |
1da177e4 LT |
640 | } |
641 | ||
287ac01a | 642 | static void zfcp_erp_wakeup(struct zfcp_adapter *adapter) |
1da177e4 | 643 | { |
1da177e4 LT |
644 | unsigned long flags; |
645 | ||
ecf0c772 | 646 | read_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a CS |
647 | if (list_empty(&adapter->erp_ready_head) && |
648 | list_empty(&adapter->erp_running_head)) { | |
805de8f4 | 649 | atomic_andnot(ZFCP_STATUS_ADAPTER_ERP_PENDING, |
287ac01a CS |
650 | &adapter->status); |
651 | wake_up(&adapter->erp_done_wqh); | |
1da177e4 | 652 | } |
ecf0c772 | 653 | read_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 654 | } |
1da177e4 | 655 | |
287ac01a CS |
656 | static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter) |
657 | { | |
658 | struct zfcp_port *port; | |
659 | port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0, | |
660 | adapter->peer_d_id); | |
661 | if (IS_ERR(port)) /* error or port already attached */ | |
662 | return; | |
ea4a3a6a | 663 | _zfcp_erp_port_reopen(port, 0, "ereptp1"); |
287ac01a | 664 | } |
1da177e4 | 665 | |
287ac01a CS |
666 | static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action) |
667 | { | |
668 | int retries; | |
669 | int sleep = 1; | |
670 | struct zfcp_adapter *adapter = erp_action->adapter; | |
1da177e4 | 671 | |
805de8f4 | 672 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); |
287ac01a CS |
673 | |
674 | for (retries = 7; retries; retries--) { | |
805de8f4 | 675 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a CS |
676 | &adapter->status); |
677 | write_lock_irq(&adapter->erp_lock); | |
678 | zfcp_erp_action_to_running(erp_action); | |
679 | write_unlock_irq(&adapter->erp_lock); | |
680 | if (zfcp_fsf_exchange_config_data(erp_action)) { | |
805de8f4 | 681 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a CS |
682 | &adapter->status); |
683 | return ZFCP_ERP_FAILED; | |
1da177e4 | 684 | } |
1da177e4 | 685 | |
347c6a96 CS |
686 | wait_event(adapter->erp_ready_wq, |
687 | !list_empty(&adapter->erp_ready_head)); | |
287ac01a CS |
688 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) |
689 | break; | |
1da177e4 | 690 | |
287ac01a CS |
691 | if (!(atomic_read(&adapter->status) & |
692 | ZFCP_STATUS_ADAPTER_HOST_CON_INIT)) | |
693 | break; | |
1da177e4 | 694 | |
287ac01a CS |
695 | ssleep(sleep); |
696 | sleep *= 2; | |
1da177e4 LT |
697 | } |
698 | ||
805de8f4 | 699 | atomic_andnot(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, |
287ac01a | 700 | &adapter->status); |
1da177e4 | 701 | |
287ac01a CS |
702 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK)) |
703 | return ZFCP_ERP_FAILED; | |
41fa2ada | 704 | |
287ac01a CS |
705 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) |
706 | zfcp_erp_enqueue_ptp_port(adapter); | |
1da177e4 | 707 | |
287ac01a | 708 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
709 | } |
710 | ||
287ac01a | 711 | static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act) |
1da177e4 | 712 | { |
287ac01a CS |
713 | int ret; |
714 | struct zfcp_adapter *adapter = act->adapter; | |
1da177e4 | 715 | |
287ac01a CS |
716 | write_lock_irq(&adapter->erp_lock); |
717 | zfcp_erp_action_to_running(act); | |
718 | write_unlock_irq(&adapter->erp_lock); | |
719 | ||
720 | ret = zfcp_fsf_exchange_port_data(act); | |
721 | if (ret == -EOPNOTSUPP) | |
722 | return ZFCP_ERP_SUCCEEDED; | |
723 | if (ret) | |
724 | return ZFCP_ERP_FAILED; | |
725 | ||
ae0904f6 | 726 | zfcp_dbf_rec_run("erasox1", act); |
347c6a96 CS |
727 | wait_event(adapter->erp_ready_wq, |
728 | !list_empty(&adapter->erp_ready_head)); | |
ae0904f6 | 729 | zfcp_dbf_rec_run("erasox2", act); |
287ac01a CS |
730 | if (act->status & ZFCP_STATUS_ERP_TIMEDOUT) |
731 | return ZFCP_ERP_FAILED; | |
732 | ||
733 | return ZFCP_ERP_SUCCEEDED; | |
1da177e4 LT |
734 | } |
735 | ||
287ac01a | 736 | static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) |
1da177e4 | 737 | { |
287ac01a CS |
738 | if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED) |
739 | return ZFCP_ERP_FAILED; | |
1da177e4 | 740 | |
287ac01a CS |
741 | if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) |
742 | return ZFCP_ERP_FAILED; | |
1da177e4 | 743 | |
c7b279ae | 744 | if (mempool_resize(act->adapter->pool.sr_data, |
11d83360 | 745 | act->adapter->stat_read_buf_num)) |
8d88cf3f CS |
746 | return ZFCP_ERP_FAILED; |
747 | ||
748 | if (mempool_resize(act->adapter->pool.status_read_req, | |
11d83360 | 749 | act->adapter->stat_read_buf_num)) |
8d88cf3f CS |
750 | return ZFCP_ERP_FAILED; |
751 | ||
64deb6ef | 752 | atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num); |
287ac01a CS |
753 | if (zfcp_status_read_refill(act->adapter)) |
754 | return ZFCP_ERP_FAILED; | |
1da177e4 | 755 | |
287ac01a CS |
756 | return ZFCP_ERP_SUCCEEDED; |
757 | } | |
1da177e4 | 758 | |
cf13c082 | 759 | static void zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *act) |
287ac01a | 760 | { |
287ac01a | 761 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 762 | |
287ac01a | 763 | /* close queues to ensure that buffers are not accessed by adapter */ |
564e1c86 | 764 | zfcp_qdio_close(adapter->qdio); |
287ac01a CS |
765 | zfcp_fsf_req_dismiss_all(adapter); |
766 | adapter->fsf_req_seq_no = 0; | |
55c770fa | 767 | zfcp_fc_wka_ports_force_offline(adapter->gs); |
b62a8d9b | 768 | /* all ports and LUNs are closed */ |
edaed859 | 769 | zfcp_erp_clear_adapter_status(adapter, ZFCP_STATUS_COMMON_OPEN); |
cf13c082 | 770 | |
805de8f4 | 771 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
cf13c082 | 772 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); |
1da177e4 LT |
773 | } |
774 | ||
cf13c082 | 775 | static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *act) |
1da177e4 | 776 | { |
cf13c082 | 777 | struct zfcp_adapter *adapter = act->adapter; |
1da177e4 | 778 | |
3d63d3b4 | 779 | if (zfcp_qdio_open(adapter->qdio)) { |
805de8f4 | 780 | atomic_andnot(ZFCP_STATUS_ADAPTER_XCONFIG_OK | |
cf13c082 SS |
781 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, |
782 | &adapter->status); | |
783 | return ZFCP_ERP_FAILED; | |
784 | } | |
287ac01a | 785 | |
cf13c082 SS |
786 | if (zfcp_erp_adapter_strategy_open_fsf(act)) { |
787 | zfcp_erp_adapter_strategy_close(act); | |
788 | return ZFCP_ERP_FAILED; | |
789 | } | |
790 | ||
805de8f4 | 791 | atomic_or(ZFCP_STATUS_COMMON_OPEN, &adapter->status); |
cf13c082 SS |
792 | |
793 | return ZFCP_ERP_SUCCEEDED; | |
794 | } | |
287ac01a | 795 | |
cf13c082 SS |
796 | static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act) |
797 | { | |
798 | struct zfcp_adapter *adapter = act->adapter; | |
799 | ||
800 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN) { | |
801 | zfcp_erp_adapter_strategy_close(act); | |
802 | if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
803 | return ZFCP_ERP_EXIT; | |
804 | } | |
805 | ||
806 | if (zfcp_erp_adapter_strategy_open(act)) { | |
287ac01a | 807 | ssleep(8); |
cf13c082 SS |
808 | return ZFCP_ERP_FAILED; |
809 | } | |
1da177e4 | 810 | |
cf13c082 | 811 | return ZFCP_ERP_SUCCEEDED; |
1da177e4 LT |
812 | } |
813 | ||
287ac01a | 814 | static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act) |
1da177e4 | 815 | { |
287ac01a CS |
816 | int retval; |
817 | ||
818 | retval = zfcp_fsf_close_physical_port(act); | |
819 | if (retval == -ENOMEM) | |
820 | return ZFCP_ERP_NOMEM; | |
821 | act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING; | |
822 | if (retval) | |
823 | return ZFCP_ERP_FAILED; | |
824 | ||
825 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
826 | } |
827 | ||
287ac01a CS |
828 | static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action) |
829 | { | |
830 | struct zfcp_port *port = erp_action->port; | |
831 | int status = atomic_read(&port->status); | |
832 | ||
833 | switch (erp_action->step) { | |
834 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
287ac01a CS |
835 | if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) && |
836 | (status & ZFCP_STATUS_COMMON_OPEN)) | |
837 | return zfcp_erp_port_forced_strategy_close(erp_action); | |
838 | else | |
839 | return ZFCP_ERP_FAILED; | |
840 | ||
841 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
ddb3e0c1 | 842 | if (!(status & ZFCP_STATUS_PORT_PHYS_OPEN)) |
287ac01a CS |
843 | return ZFCP_ERP_SUCCEEDED; |
844 | } | |
845 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
846 | } |
847 | ||
287ac01a | 848 | static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action) |
1da177e4 | 849 | { |
287ac01a | 850 | int retval; |
1da177e4 | 851 | |
287ac01a CS |
852 | retval = zfcp_fsf_close_port(erp_action); |
853 | if (retval == -ENOMEM) | |
854 | return ZFCP_ERP_NOMEM; | |
855 | erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING; | |
856 | if (retval) | |
857 | return ZFCP_ERP_FAILED; | |
858 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
859 | } |
860 | ||
287ac01a | 861 | static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action) |
1da177e4 | 862 | { |
287ac01a | 863 | int retval; |
1da177e4 | 864 | |
287ac01a CS |
865 | retval = zfcp_fsf_open_port(erp_action); |
866 | if (retval == -ENOMEM) | |
867 | return ZFCP_ERP_NOMEM; | |
868 | erp_action->step = ZFCP_ERP_STEP_PORT_OPENING; | |
869 | if (retval) | |
870 | return ZFCP_ERP_FAILED; | |
871 | return ZFCP_ERP_CONTINUES; | |
872 | } | |
1da177e4 | 873 | |
287ac01a | 874 | static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act) |
1da177e4 | 875 | { |
287ac01a CS |
876 | struct zfcp_adapter *adapter = act->adapter; |
877 | struct zfcp_port *port = act->port; | |
1da177e4 | 878 | |
287ac01a | 879 | if (port->wwpn != adapter->peer_wwpn) { |
edaed859 | 880 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
287ac01a CS |
881 | return ZFCP_ERP_FAILED; |
882 | } | |
883 | port->d_id = adapter->peer_d_id; | |
287ac01a CS |
884 | return zfcp_erp_port_strategy_open_port(act); |
885 | } | |
886 | ||
887 | static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act) | |
888 | { | |
889 | struct zfcp_adapter *adapter = act->adapter; | |
890 | struct zfcp_port *port = act->port; | |
287ac01a CS |
891 | int p_status = atomic_read(&port->status); |
892 | ||
893 | switch (act->step) { | |
894 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
895 | case ZFCP_ERP_STEP_PHYS_PORT_CLOSING: | |
896 | case ZFCP_ERP_STEP_PORT_CLOSING: | |
897 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) | |
898 | return zfcp_erp_open_ptp_port(act); | |
b98478d7 | 899 | if (!port->d_id) { |
934aeb58 | 900 | zfcp_fc_trigger_did_lookup(port); |
799b76d0 | 901 | return ZFCP_ERP_EXIT; |
287ac01a | 902 | } |
287ac01a CS |
903 | return zfcp_erp_port_strategy_open_port(act); |
904 | ||
905 | case ZFCP_ERP_STEP_PORT_OPENING: | |
906 | /* D_ID might have changed during open */ | |
5ab944f9 | 907 | if (p_status & ZFCP_STATUS_COMMON_OPEN) { |
934aeb58 CS |
908 | if (!port->d_id) { |
909 | zfcp_fc_trigger_did_lookup(port); | |
910 | return ZFCP_ERP_EXIT; | |
5ab944f9 | 911 | } |
934aeb58 | 912 | return ZFCP_ERP_SUCCEEDED; |
5ab944f9 | 913 | } |
ea460a81 SS |
914 | if (port->d_id && !(p_status & ZFCP_STATUS_COMMON_NOESC)) { |
915 | port->d_id = 0; | |
f7bd7c36 | 916 | return ZFCP_ERP_FAILED; |
ea460a81 SS |
917 | } |
918 | /* fall through otherwise */ | |
287ac01a CS |
919 | } |
920 | return ZFCP_ERP_FAILED; | |
921 | } | |
922 | ||
287ac01a CS |
923 | static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action) |
924 | { | |
925 | struct zfcp_port *port = erp_action->port; | |
934aeb58 | 926 | int p_status = atomic_read(&port->status); |
287ac01a | 927 | |
934aeb58 CS |
928 | if ((p_status & ZFCP_STATUS_COMMON_NOESC) && |
929 | !(p_status & ZFCP_STATUS_COMMON_OPEN)) | |
5ab944f9 SS |
930 | goto close_init_done; |
931 | ||
287ac01a CS |
932 | switch (erp_action->step) { |
933 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
934aeb58 | 934 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 935 | return zfcp_erp_port_strategy_close(erp_action); |
1da177e4 LT |
936 | break; |
937 | ||
287ac01a | 938 | case ZFCP_ERP_STEP_PORT_CLOSING: |
934aeb58 | 939 | if (p_status & ZFCP_STATUS_COMMON_OPEN) |
287ac01a | 940 | return ZFCP_ERP_FAILED; |
1da177e4 LT |
941 | break; |
942 | } | |
5ab944f9 SS |
943 | |
944 | close_init_done: | |
287ac01a CS |
945 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) |
946 | return ZFCP_ERP_EXIT; | |
1da177e4 | 947 | |
5ab944f9 | 948 | return zfcp_erp_port_strategy_open_common(erp_action); |
287ac01a CS |
949 | } |
950 | ||
b62a8d9b | 951 | static void zfcp_erp_lun_strategy_clearstati(struct scsi_device *sdev) |
287ac01a | 952 | { |
b62a8d9b CS |
953 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
954 | ||
805de8f4 | 955 | atomic_andnot(ZFCP_STATUS_COMMON_ACCESS_DENIED, |
b62a8d9b | 956 | &zfcp_sdev->status); |
287ac01a CS |
957 | } |
958 | ||
b62a8d9b | 959 | static int zfcp_erp_lun_strategy_close(struct zfcp_erp_action *erp_action) |
287ac01a | 960 | { |
b62a8d9b | 961 | int retval = zfcp_fsf_close_lun(erp_action); |
287ac01a CS |
962 | if (retval == -ENOMEM) |
963 | return ZFCP_ERP_NOMEM; | |
b62a8d9b | 964 | erp_action->step = ZFCP_ERP_STEP_LUN_CLOSING; |
287ac01a CS |
965 | if (retval) |
966 | return ZFCP_ERP_FAILED; | |
967 | return ZFCP_ERP_CONTINUES; | |
968 | } | |
969 | ||
b62a8d9b | 970 | static int zfcp_erp_lun_strategy_open(struct zfcp_erp_action *erp_action) |
287ac01a | 971 | { |
b62a8d9b | 972 | int retval = zfcp_fsf_open_lun(erp_action); |
287ac01a CS |
973 | if (retval == -ENOMEM) |
974 | return ZFCP_ERP_NOMEM; | |
b62a8d9b | 975 | erp_action->step = ZFCP_ERP_STEP_LUN_OPENING; |
287ac01a CS |
976 | if (retval) |
977 | return ZFCP_ERP_FAILED; | |
978 | return ZFCP_ERP_CONTINUES; | |
1da177e4 LT |
979 | } |
980 | ||
b62a8d9b | 981 | static int zfcp_erp_lun_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 | 982 | { |
b62a8d9b CS |
983 | struct scsi_device *sdev = erp_action->sdev; |
984 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); | |
287ac01a CS |
985 | |
986 | switch (erp_action->step) { | |
987 | case ZFCP_ERP_STEP_UNINITIALIZED: | |
b62a8d9b CS |
988 | zfcp_erp_lun_strategy_clearstati(sdev); |
989 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
990 | return zfcp_erp_lun_strategy_close(erp_action); | |
287ac01a | 991 | /* already closed, fall through */ |
b62a8d9b CS |
992 | case ZFCP_ERP_STEP_LUN_CLOSING: |
993 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
287ac01a CS |
994 | return ZFCP_ERP_FAILED; |
995 | if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY) | |
996 | return ZFCP_ERP_EXIT; | |
b62a8d9b | 997 | return zfcp_erp_lun_strategy_open(erp_action); |
287ac01a | 998 | |
b62a8d9b CS |
999 | case ZFCP_ERP_STEP_LUN_OPENING: |
1000 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_OPEN) | |
287ac01a CS |
1001 | return ZFCP_ERP_SUCCEEDED; |
1002 | } | |
1003 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1004 | } |
1005 | ||
b62a8d9b | 1006 | static int zfcp_erp_strategy_check_lun(struct scsi_device *sdev, int result) |
1da177e4 | 1007 | { |
b62a8d9b CS |
1008 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1009 | ||
1da177e4 LT |
1010 | switch (result) { |
1011 | case ZFCP_ERP_SUCCEEDED : | |
b62a8d9b CS |
1012 | atomic_set(&zfcp_sdev->erp_counter, 0); |
1013 | zfcp_erp_lun_unblock(sdev); | |
1da177e4 LT |
1014 | break; |
1015 | case ZFCP_ERP_FAILED : | |
b62a8d9b CS |
1016 | atomic_inc(&zfcp_sdev->erp_counter); |
1017 | if (atomic_read(&zfcp_sdev->erp_counter) > ZFCP_MAX_ERPS) { | |
1018 | dev_err(&zfcp_sdev->port->adapter->ccw_device->dev, | |
1019 | "ERP failed for LUN 0x%016Lx on " | |
ff3b24fa | 1020 | "port 0x%016Lx\n", |
b62a8d9b CS |
1021 | (unsigned long long)zfcp_scsi_dev_lun(sdev), |
1022 | (unsigned long long)zfcp_sdev->port->wwpn); | |
edaed859 SS |
1023 | zfcp_erp_set_lun_status(sdev, |
1024 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1025 | } |
1da177e4 | 1026 | break; |
1da177e4 LT |
1027 | } |
1028 | ||
b62a8d9b CS |
1029 | if (atomic_read(&zfcp_sdev->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1030 | zfcp_erp_lun_block(sdev, 0); | |
1da177e4 LT |
1031 | result = ZFCP_ERP_EXIT; |
1032 | } | |
1da177e4 LT |
1033 | return result; |
1034 | } | |
1035 | ||
287ac01a | 1036 | static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result) |
1da177e4 | 1037 | { |
1da177e4 LT |
1038 | switch (result) { |
1039 | case ZFCP_ERP_SUCCEEDED : | |
1040 | atomic_set(&port->erp_counter, 0); | |
1041 | zfcp_erp_port_unblock(port); | |
1042 | break; | |
287ac01a | 1043 | |
1da177e4 | 1044 | case ZFCP_ERP_FAILED : |
287ac01a | 1045 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) { |
cc8c2829 SS |
1046 | zfcp_erp_port_block(port, 0); |
1047 | result = ZFCP_ERP_EXIT; | |
1048 | } | |
1da177e4 | 1049 | atomic_inc(&port->erp_counter); |
ff3b24fa CS |
1050 | if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS) { |
1051 | dev_err(&port->adapter->ccw_device->dev, | |
1052 | "ERP failed for remote port 0x%016Lx\n", | |
7ba58c9c | 1053 | (unsigned long long)port->wwpn); |
edaed859 SS |
1054 | zfcp_erp_set_port_status(port, |
1055 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1056 | } |
1da177e4 | 1057 | break; |
1da177e4 LT |
1058 | } |
1059 | ||
287ac01a CS |
1060 | if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1061 | zfcp_erp_port_block(port, 0); | |
1da177e4 LT |
1062 | result = ZFCP_ERP_EXIT; |
1063 | } | |
1da177e4 LT |
1064 | return result; |
1065 | } | |
1066 | ||
287ac01a CS |
1067 | static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, |
1068 | int result) | |
1da177e4 | 1069 | { |
1da177e4 LT |
1070 | switch (result) { |
1071 | case ZFCP_ERP_SUCCEEDED : | |
1072 | atomic_set(&adapter->erp_counter, 0); | |
1073 | zfcp_erp_adapter_unblock(adapter); | |
1074 | break; | |
287ac01a | 1075 | |
1da177e4 LT |
1076 | case ZFCP_ERP_FAILED : |
1077 | atomic_inc(&adapter->erp_counter); | |
ff3b24fa CS |
1078 | if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS) { |
1079 | dev_err(&adapter->ccw_device->dev, | |
1080 | "ERP cannot recover an error " | |
1081 | "on the FCP device\n"); | |
edaed859 SS |
1082 | zfcp_erp_set_adapter_status(adapter, |
1083 | ZFCP_STATUS_COMMON_ERP_FAILED); | |
ff3b24fa | 1084 | } |
1da177e4 | 1085 | break; |
1da177e4 LT |
1086 | } |
1087 | ||
287ac01a CS |
1088 | if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) { |
1089 | zfcp_erp_adapter_block(adapter, 0); | |
1da177e4 LT |
1090 | result = ZFCP_ERP_EXIT; |
1091 | } | |
1da177e4 LT |
1092 | return result; |
1093 | } | |
1094 | ||
287ac01a CS |
1095 | static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, |
1096 | int result) | |
5f852be9 | 1097 | { |
287ac01a CS |
1098 | struct zfcp_adapter *adapter = erp_action->adapter; |
1099 | struct zfcp_port *port = erp_action->port; | |
b62a8d9b | 1100 | struct scsi_device *sdev = erp_action->sdev; |
287ac01a CS |
1101 | |
1102 | switch (erp_action->action) { | |
1103 | ||
b62a8d9b CS |
1104 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1105 | result = zfcp_erp_strategy_check_lun(sdev, result); | |
287ac01a CS |
1106 | break; |
1107 | ||
1108 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1109 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1110 | result = zfcp_erp_strategy_check_port(port, result); | |
1111 | break; | |
1112 | ||
1113 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1114 | result = zfcp_erp_strategy_check_adapter(adapter, result); | |
1115 | break; | |
1116 | } | |
1117 | return result; | |
5f852be9 CS |
1118 | } |
1119 | ||
287ac01a | 1120 | static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status) |
5f852be9 | 1121 | { |
287ac01a | 1122 | int status = atomic_read(target_status); |
5f852be9 | 1123 | |
287ac01a CS |
1124 | if ((status & ZFCP_STATUS_COMMON_RUNNING) && |
1125 | (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1126 | return 1; /* take it online */ | |
5f852be9 | 1127 | |
287ac01a CS |
1128 | if (!(status & ZFCP_STATUS_COMMON_RUNNING) && |
1129 | !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY)) | |
1130 | return 1; /* take it offline */ | |
1131 | ||
1132 | return 0; | |
5f852be9 CS |
1133 | } |
1134 | ||
287ac01a | 1135 | static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret) |
1da177e4 | 1136 | { |
287ac01a CS |
1137 | int action = act->action; |
1138 | struct zfcp_adapter *adapter = act->adapter; | |
1139 | struct zfcp_port *port = act->port; | |
b62a8d9b CS |
1140 | struct scsi_device *sdev = act->sdev; |
1141 | struct zfcp_scsi_dev *zfcp_sdev; | |
287ac01a | 1142 | u32 erp_status = act->status; |
1da177e4 | 1143 | |
287ac01a | 1144 | switch (action) { |
1da177e4 | 1145 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
287ac01a CS |
1146 | if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) { |
1147 | _zfcp_erp_adapter_reopen(adapter, | |
1148 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1149 | "ersscg1"); |
287ac01a CS |
1150 | return ZFCP_ERP_EXIT; |
1151 | } | |
1da177e4 LT |
1152 | break; |
1153 | ||
1154 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1da177e4 | 1155 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
287ac01a CS |
1156 | if (zfcp_erp_strat_change_det(&port->status, erp_status)) { |
1157 | _zfcp_erp_port_reopen(port, | |
1158 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1159 | "ersscg2"); |
287ac01a CS |
1160 | return ZFCP_ERP_EXIT; |
1161 | } | |
1da177e4 LT |
1162 | break; |
1163 | ||
b62a8d9b CS |
1164 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1165 | zfcp_sdev = sdev_to_zfcp(sdev); | |
1166 | if (zfcp_erp_strat_change_det(&zfcp_sdev->status, erp_status)) { | |
1167 | _zfcp_erp_lun_reopen(sdev, | |
1168 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 1169 | "ersscg3", 0); |
287ac01a CS |
1170 | return ZFCP_ERP_EXIT; |
1171 | } | |
1da177e4 LT |
1172 | break; |
1173 | } | |
287ac01a | 1174 | return ret; |
1da177e4 LT |
1175 | } |
1176 | ||
287ac01a | 1177 | static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action) |
1da177e4 | 1178 | { |
287ac01a | 1179 | struct zfcp_adapter *adapter = erp_action->adapter; |
b62a8d9b | 1180 | struct zfcp_scsi_dev *zfcp_sdev; |
1da177e4 | 1181 | |
287ac01a CS |
1182 | adapter->erp_total_count--; |
1183 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1184 | adapter->erp_low_mem_count--; | |
1185 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
507e4969 | 1186 | } |
1da177e4 | 1187 | |
287ac01a | 1188 | list_del(&erp_action->list); |
ae0904f6 | 1189 | zfcp_dbf_rec_run("eractd1", erp_action); |
1da177e4 | 1190 | |
287ac01a | 1191 | switch (erp_action->action) { |
b62a8d9b CS |
1192 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1193 | zfcp_sdev = sdev_to_zfcp(erp_action->sdev); | |
805de8f4 | 1194 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
b62a8d9b | 1195 | &zfcp_sdev->status); |
287ac01a | 1196 | break; |
1da177e4 | 1197 | |
287ac01a CS |
1198 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: |
1199 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
805de8f4 | 1200 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
287ac01a CS |
1201 | &erp_action->port->status); |
1202 | break; | |
1da177e4 | 1203 | |
287ac01a | 1204 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: |
805de8f4 | 1205 | atomic_andnot(ZFCP_STATUS_COMMON_ERP_INUSE, |
287ac01a CS |
1206 | &erp_action->adapter->status); |
1207 | break; | |
1208 | } | |
1da177e4 LT |
1209 | } |
1210 | ||
6f2ce1c6 SM |
1211 | /** |
1212 | * zfcp_erp_try_rport_unblock - unblock rport if no more/new recovery | |
1213 | * @port: zfcp_port whose fc_rport we should try to unblock | |
1214 | */ | |
1215 | static void zfcp_erp_try_rport_unblock(struct zfcp_port *port) | |
1216 | { | |
1217 | unsigned long flags; | |
1218 | struct zfcp_adapter *adapter = port->adapter; | |
1219 | int port_status; | |
1220 | struct Scsi_Host *shost = adapter->scsi_host; | |
1221 | struct scsi_device *sdev; | |
1222 | ||
1223 | write_lock_irqsave(&adapter->erp_lock, flags); | |
1224 | port_status = atomic_read(&port->status); | |
1225 | if ((port_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || | |
1226 | (port_status & (ZFCP_STATUS_COMMON_ERP_INUSE | | |
1227 | ZFCP_STATUS_COMMON_ERP_FAILED)) != 0) { | |
1228 | /* new ERP of severity >= port triggered elsewhere meanwhile or | |
1229 | * local link down (adapter erp_failed but not clear unblock) | |
1230 | */ | |
1231 | zfcp_dbf_rec_run_lvl(4, "ertru_p", &port->erp_action); | |
1232 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1233 | return; | |
1234 | } | |
1235 | spin_lock(shost->host_lock); | |
1236 | __shost_for_each_device(sdev, shost) { | |
1237 | struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev); | |
1238 | int lun_status; | |
1239 | ||
1240 | if (zsdev->port != port) | |
1241 | continue; | |
1242 | /* LUN under port of interest */ | |
1243 | lun_status = atomic_read(&zsdev->status); | |
1244 | if ((lun_status & ZFCP_STATUS_COMMON_ERP_FAILED) != 0) | |
1245 | continue; /* unblock rport despite failed LUNs */ | |
1246 | /* LUN recovery not given up yet [maybe follow-up pending] */ | |
1247 | if ((lun_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 || | |
1248 | (lun_status & ZFCP_STATUS_COMMON_ERP_INUSE) != 0) { | |
1249 | /* LUN blocked: | |
1250 | * not yet unblocked [LUN recovery pending] | |
1251 | * or meanwhile blocked [new LUN recovery triggered] | |
1252 | */ | |
1253 | zfcp_dbf_rec_run_lvl(4, "ertru_l", &zsdev->erp_action); | |
1254 | spin_unlock(shost->host_lock); | |
1255 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1256 | return; | |
1257 | } | |
1258 | } | |
1259 | /* now port has no child or all children have completed recovery, | |
1260 | * and no ERP of severity >= port was meanwhile triggered elsewhere | |
1261 | */ | |
1262 | zfcp_scsi_schedule_rport_register(port); | |
1263 | spin_unlock(shost->host_lock); | |
1264 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1265 | } | |
1266 | ||
287ac01a | 1267 | static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result) |
1da177e4 | 1268 | { |
287ac01a CS |
1269 | struct zfcp_adapter *adapter = act->adapter; |
1270 | struct zfcp_port *port = act->port; | |
b62a8d9b | 1271 | struct scsi_device *sdev = act->sdev; |
1da177e4 | 1272 | |
287ac01a | 1273 | switch (act->action) { |
b62a8d9b | 1274 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
fdbd1c5e | 1275 | if (!(act->status & ZFCP_STATUS_ERP_NO_REF)) |
b62a8d9b | 1276 | scsi_device_put(sdev); |
6f2ce1c6 | 1277 | zfcp_erp_try_rport_unblock(port); |
287ac01a | 1278 | break; |
1da177e4 | 1279 | |
287ac01a | 1280 | case ZFCP_ERP_ACTION_REOPEN_PORT: |
4eeaa4f3 SM |
1281 | /* This switch case might also happen after a forced reopen |
1282 | * was successfully done and thus overwritten with a new | |
1283 | * non-forced reopen at `ersfs_2'. In this case, we must not | |
1284 | * do the clean-up of the non-forced version. | |
1285 | */ | |
1286 | if (act->step != ZFCP_ERP_STEP_UNINITIALIZED) | |
1287 | if (result == ZFCP_ERP_SUCCEEDED) | |
6f2ce1c6 | 1288 | zfcp_erp_try_rport_unblock(port); |
5767620c CS |
1289 | /* fall through */ |
1290 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
615f59e0 | 1291 | put_device(&port->dev); |
287ac01a CS |
1292 | break; |
1293 | ||
1294 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
a2fa0aed | 1295 | if (result == ZFCP_ERP_SUCCEEDED) { |
bd43a42b | 1296 | register_service_level(&adapter->service_level); |
43f60cbd | 1297 | zfcp_fc_conditional_port_scan(adapter); |
038d9446 | 1298 | queue_work(adapter->work_queue, &adapter->ns_up_work); |
a2fa0aed CS |
1299 | } else |
1300 | unregister_service_level(&adapter->service_level); | |
038d9446 | 1301 | |
f3450c7b | 1302 | kref_put(&adapter->ref, zfcp_adapter_release); |
287ac01a CS |
1303 | break; |
1304 | } | |
1da177e4 LT |
1305 | } |
1306 | ||
287ac01a | 1307 | static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action) |
1da177e4 | 1308 | { |
287ac01a CS |
1309 | switch (erp_action->action) { |
1310 | case ZFCP_ERP_ACTION_REOPEN_ADAPTER: | |
1311 | return zfcp_erp_adapter_strategy(erp_action); | |
1312 | case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED: | |
1313 | return zfcp_erp_port_forced_strategy(erp_action); | |
1314 | case ZFCP_ERP_ACTION_REOPEN_PORT: | |
1315 | return zfcp_erp_port_strategy(erp_action); | |
b62a8d9b CS |
1316 | case ZFCP_ERP_ACTION_REOPEN_LUN: |
1317 | return zfcp_erp_lun_strategy(erp_action); | |
287ac01a CS |
1318 | } |
1319 | return ZFCP_ERP_FAILED; | |
1da177e4 LT |
1320 | } |
1321 | ||
287ac01a | 1322 | static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action) |
1da177e4 LT |
1323 | { |
1324 | int retval; | |
287ac01a | 1325 | unsigned long flags; |
ecf0c772 | 1326 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1327 | |
f3450c7b | 1328 | kref_get(&adapter->ref); |
1da177e4 | 1329 | |
f3450c7b | 1330 | write_lock_irqsave(&adapter->erp_lock, flags); |
287ac01a | 1331 | zfcp_erp_strategy_check_fsfreq(erp_action); |
1da177e4 | 1332 | |
287ac01a CS |
1333 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) { |
1334 | zfcp_erp_action_dequeue(erp_action); | |
1335 | retval = ZFCP_ERP_DISMISSED; | |
1336 | goto unlock; | |
22753fa5 | 1337 | } |
1da177e4 | 1338 | |
9c785d94 CS |
1339 | if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT) { |
1340 | retval = ZFCP_ERP_FAILED; | |
1341 | goto check_target; | |
1342 | } | |
1343 | ||
2f8f3ed5 | 1344 | zfcp_erp_action_to_running(erp_action); |
1da177e4 | 1345 | |
287ac01a | 1346 | /* no lock to allow for blocking operations */ |
ecf0c772 | 1347 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
287ac01a | 1348 | retval = zfcp_erp_strategy_do_action(erp_action); |
ecf0c772 | 1349 | write_lock_irqsave(&adapter->erp_lock, flags); |
1da177e4 | 1350 | |
287ac01a CS |
1351 | if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) |
1352 | retval = ZFCP_ERP_CONTINUES; | |
cc8c2829 | 1353 | |
287ac01a CS |
1354 | switch (retval) { |
1355 | case ZFCP_ERP_NOMEM: | |
1356 | if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) { | |
1357 | ++adapter->erp_low_mem_count; | |
1358 | erp_action->status |= ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1359 | } |
287ac01a | 1360 | if (adapter->erp_total_count == adapter->erp_low_mem_count) |
ea4a3a6a | 1361 | _zfcp_erp_adapter_reopen(adapter, 0, "erstgy1"); |
287ac01a CS |
1362 | else { |
1363 | zfcp_erp_strategy_memwait(erp_action); | |
1364 | retval = ZFCP_ERP_CONTINUES; | |
1da177e4 | 1365 | } |
287ac01a | 1366 | goto unlock; |
1da177e4 | 1367 | |
287ac01a CS |
1368 | case ZFCP_ERP_CONTINUES: |
1369 | if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) { | |
1370 | --adapter->erp_low_mem_count; | |
1371 | erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM; | |
1da177e4 | 1372 | } |
287ac01a | 1373 | goto unlock; |
1da177e4 LT |
1374 | } |
1375 | ||
9c785d94 | 1376 | check_target: |
287ac01a CS |
1377 | retval = zfcp_erp_strategy_check_target(erp_action, retval); |
1378 | zfcp_erp_action_dequeue(erp_action); | |
1379 | retval = zfcp_erp_strategy_statechange(erp_action, retval); | |
1380 | if (retval == ZFCP_ERP_EXIT) | |
1381 | goto unlock; | |
85600f7f CS |
1382 | if (retval == ZFCP_ERP_SUCCEEDED) |
1383 | zfcp_erp_strategy_followup_success(erp_action); | |
1384 | if (retval == ZFCP_ERP_FAILED) | |
1385 | zfcp_erp_strategy_followup_failed(erp_action); | |
1da177e4 | 1386 | |
287ac01a | 1387 | unlock: |
ecf0c772 | 1388 | write_unlock_irqrestore(&adapter->erp_lock, flags); |
1da177e4 | 1389 | |
287ac01a CS |
1390 | if (retval != ZFCP_ERP_CONTINUES) |
1391 | zfcp_erp_action_cleanup(erp_action, retval); | |
1da177e4 | 1392 | |
f3450c7b | 1393 | kref_put(&adapter->ref, zfcp_adapter_release); |
1da177e4 LT |
1394 | return retval; |
1395 | } | |
1396 | ||
287ac01a | 1397 | static int zfcp_erp_thread(void *data) |
1da177e4 | 1398 | { |
287ac01a CS |
1399 | struct zfcp_adapter *adapter = (struct zfcp_adapter *) data; |
1400 | struct list_head *next; | |
1401 | struct zfcp_erp_action *act; | |
1402 | unsigned long flags; | |
94ab4b38 | 1403 | |
347c6a96 | 1404 | for (;;) { |
347c6a96 CS |
1405 | wait_event_interruptible(adapter->erp_ready_wq, |
1406 | !list_empty(&adapter->erp_ready_head) || | |
1407 | kthread_should_stop()); | |
94ab4b38 | 1408 | |
347c6a96 CS |
1409 | if (kthread_should_stop()) |
1410 | break; | |
1411 | ||
287ac01a CS |
1412 | write_lock_irqsave(&adapter->erp_lock, flags); |
1413 | next = adapter->erp_ready_head.next; | |
1414 | write_unlock_irqrestore(&adapter->erp_lock, flags); | |
1da177e4 | 1415 | |
287ac01a CS |
1416 | if (next != &adapter->erp_ready_head) { |
1417 | act = list_entry(next, struct zfcp_erp_action, list); | |
1da177e4 | 1418 | |
287ac01a CS |
1419 | /* there is more to come after dismission, no notify */ |
1420 | if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED) | |
1421 | zfcp_erp_wakeup(adapter); | |
1da177e4 | 1422 | } |
1da177e4 LT |
1423 | } |
1424 | ||
287ac01a CS |
1425 | return 0; |
1426 | } | |
1da177e4 | 1427 | |
287ac01a CS |
1428 | /** |
1429 | * zfcp_erp_thread_setup - Start ERP thread for adapter | |
1430 | * @adapter: Adapter to start the ERP thread for | |
1431 | * | |
1432 | * Returns 0 on success or error code from kernel_thread() | |
1433 | */ | |
1434 | int zfcp_erp_thread_setup(struct zfcp_adapter *adapter) | |
1435 | { | |
347c6a96 | 1436 | struct task_struct *thread; |
1da177e4 | 1437 | |
347c6a96 CS |
1438 | thread = kthread_run(zfcp_erp_thread, adapter, "zfcperp%s", |
1439 | dev_name(&adapter->ccw_device->dev)); | |
1440 | if (IS_ERR(thread)) { | |
287ac01a | 1441 | dev_err(&adapter->ccw_device->dev, |
ff3b24fa | 1442 | "Creating an ERP thread for the FCP device failed.\n"); |
347c6a96 | 1443 | return PTR_ERR(thread); |
1da177e4 | 1444 | } |
347c6a96 CS |
1445 | |
1446 | adapter->erp_thread = thread; | |
287ac01a CS |
1447 | return 0; |
1448 | } | |
1da177e4 | 1449 | |
287ac01a CS |
1450 | /** |
1451 | * zfcp_erp_thread_kill - Stop ERP thread. | |
1452 | * @adapter: Adapter where the ERP thread should be stopped. | |
1453 | * | |
1454 | * The caller of this routine ensures that the specified adapter has | |
1455 | * been shut down and that this operation has been completed. Thus, | |
1456 | * there are no pending erp_actions which would need to be handled | |
1457 | * here. | |
1458 | */ | |
1459 | void zfcp_erp_thread_kill(struct zfcp_adapter *adapter) | |
1460 | { | |
347c6a96 CS |
1461 | kthread_stop(adapter->erp_thread); |
1462 | adapter->erp_thread = NULL; | |
143bb6bf CS |
1463 | WARN_ON(!list_empty(&adapter->erp_ready_head)); |
1464 | WARN_ON(!list_empty(&adapter->erp_running_head)); | |
1da177e4 LT |
1465 | } |
1466 | ||
287ac01a | 1467 | /** |
edaed859 SS |
1468 | * zfcp_erp_wait - wait for completion of error recovery on an adapter |
1469 | * @adapter: adapter for which to wait for completion of its error recovery | |
287ac01a | 1470 | */ |
edaed859 | 1471 | void zfcp_erp_wait(struct zfcp_adapter *adapter) |
1da177e4 | 1472 | { |
edaed859 SS |
1473 | wait_event(adapter->erp_done_wqh, |
1474 | !(atomic_read(&adapter->status) & | |
1475 | ZFCP_STATUS_ADAPTER_ERP_PENDING)); | |
287ac01a | 1476 | } |
1da177e4 | 1477 | |
287ac01a | 1478 | /** |
edaed859 SS |
1479 | * zfcp_erp_set_adapter_status - set adapter status bits |
1480 | * @adapter: adapter to change the status | |
1481 | * @mask: status bits to change | |
1482 | * | |
1483 | * Changes in common status bits are propagated to attached ports and LUNs. | |
287ac01a | 1484 | */ |
edaed859 | 1485 | void zfcp_erp_set_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
287ac01a | 1486 | { |
edaed859 SS |
1487 | struct zfcp_port *port; |
1488 | struct scsi_device *sdev; | |
1489 | unsigned long flags; | |
1490 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1da177e4 | 1491 | |
805de8f4 | 1492 | atomic_or(mask, &adapter->status); |
1da177e4 | 1493 | |
edaed859 SS |
1494 | if (!common_mask) |
1495 | return; | |
1496 | ||
1497 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1498 | list_for_each_entry(port, &adapter->port_list, list) | |
805de8f4 | 1499 | atomic_or(common_mask, &port->status); |
edaed859 SS |
1500 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
1501 | ||
924dd584 MP |
1502 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1503 | __shost_for_each_device(sdev, adapter->scsi_host) | |
805de8f4 | 1504 | atomic_or(common_mask, &sdev_to_zfcp(sdev)->status); |
924dd584 | 1505 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
287ac01a | 1506 | } |
1da177e4 | 1507 | |
287ac01a | 1508 | /** |
edaed859 | 1509 | * zfcp_erp_clear_adapter_status - clear adapter status bits |
287ac01a | 1510 | * @adapter: adapter to change the status |
287ac01a | 1511 | * @mask: status bits to change |
287ac01a | 1512 | * |
b62a8d9b | 1513 | * Changes in common status bits are propagated to attached ports and LUNs. |
287ac01a | 1514 | */ |
edaed859 | 1515 | void zfcp_erp_clear_adapter_status(struct zfcp_adapter *adapter, u32 mask) |
1da177e4 | 1516 | { |
1da177e4 | 1517 | struct zfcp_port *port; |
edaed859 | 1518 | struct scsi_device *sdev; |
ecf0c772 | 1519 | unsigned long flags; |
287ac01a | 1520 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
edaed859 | 1521 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; |
1da177e4 | 1522 | |
805de8f4 | 1523 | atomic_andnot(mask, &adapter->status); |
edaed859 SS |
1524 | |
1525 | if (!common_mask) | |
1526 | return; | |
1527 | ||
1528 | if (clear_counter) | |
1529 | atomic_set(&adapter->erp_counter, 0); | |
1530 | ||
1531 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
1532 | list_for_each_entry(port, &adapter->port_list, list) { | |
805de8f4 | 1533 | atomic_andnot(common_mask, &port->status); |
edaed859 SS |
1534 | if (clear_counter) |
1535 | atomic_set(&port->erp_counter, 0); | |
287ac01a | 1536 | } |
edaed859 | 1537 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
287ac01a | 1538 | |
924dd584 MP |
1539 | spin_lock_irqsave(adapter->scsi_host->host_lock, flags); |
1540 | __shost_for_each_device(sdev, adapter->scsi_host) { | |
805de8f4 | 1541 | atomic_andnot(common_mask, &sdev_to_zfcp(sdev)->status); |
edaed859 SS |
1542 | if (clear_counter) |
1543 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
ecf0c772 | 1544 | } |
924dd584 | 1545 | spin_unlock_irqrestore(adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1546 | } |
1547 | ||
287ac01a | 1548 | /** |
edaed859 SS |
1549 | * zfcp_erp_set_port_status - set port status bits |
1550 | * @port: port to change the status | |
287ac01a | 1551 | * @mask: status bits to change |
287ac01a | 1552 | * |
b62a8d9b | 1553 | * Changes in common status bits are propagated to attached LUNs. |
287ac01a | 1554 | */ |
edaed859 | 1555 | void zfcp_erp_set_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1556 | { |
b62a8d9b | 1557 | struct scsi_device *sdev; |
287ac01a | 1558 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; |
924dd584 | 1559 | unsigned long flags; |
1da177e4 | 1560 | |
805de8f4 | 1561 | atomic_or(mask, &port->status); |
1da177e4 | 1562 | |
edaed859 SS |
1563 | if (!common_mask) |
1564 | return; | |
1565 | ||
924dd584 MP |
1566 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1567 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1568 | if (sdev_to_zfcp(sdev)->port == port) |
805de8f4 | 1569 | atomic_or(common_mask, |
edaed859 | 1570 | &sdev_to_zfcp(sdev)->status); |
924dd584 | 1571 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1572 | } |
1573 | ||
287ac01a | 1574 | /** |
edaed859 SS |
1575 | * zfcp_erp_clear_port_status - clear port status bits |
1576 | * @port: adapter to change the status | |
287ac01a | 1577 | * @mask: status bits to change |
edaed859 SS |
1578 | * |
1579 | * Changes in common status bits are propagated to attached LUNs. | |
287ac01a | 1580 | */ |
edaed859 | 1581 | void zfcp_erp_clear_port_status(struct zfcp_port *port, u32 mask) |
1da177e4 | 1582 | { |
edaed859 SS |
1583 | struct scsi_device *sdev; |
1584 | u32 common_mask = mask & ZFCP_COMMON_FLAGS; | |
1585 | u32 clear_counter = mask & ZFCP_STATUS_COMMON_ERP_FAILED; | |
924dd584 | 1586 | unsigned long flags; |
edaed859 | 1587 | |
805de8f4 | 1588 | atomic_andnot(mask, &port->status); |
edaed859 SS |
1589 | |
1590 | if (!common_mask) | |
1591 | return; | |
b62a8d9b | 1592 | |
edaed859 SS |
1593 | if (clear_counter) |
1594 | atomic_set(&port->erp_counter, 0); | |
1595 | ||
924dd584 MP |
1596 | spin_lock_irqsave(port->adapter->scsi_host->host_lock, flags); |
1597 | __shost_for_each_device(sdev, port->adapter->scsi_host) | |
edaed859 | 1598 | if (sdev_to_zfcp(sdev)->port == port) { |
805de8f4 | 1599 | atomic_andnot(common_mask, |
edaed859 SS |
1600 | &sdev_to_zfcp(sdev)->status); |
1601 | if (clear_counter) | |
1602 | atomic_set(&sdev_to_zfcp(sdev)->erp_counter, 0); | |
287ac01a | 1603 | } |
924dd584 | 1604 | spin_unlock_irqrestore(port->adapter->scsi_host->host_lock, flags); |
1da177e4 LT |
1605 | } |
1606 | ||
287ac01a | 1607 | /** |
edaed859 SS |
1608 | * zfcp_erp_set_lun_status - set lun status bits |
1609 | * @sdev: SCSI device / lun to set the status bits | |
1610 | * @mask: status bits to change | |
287ac01a | 1611 | */ |
edaed859 | 1612 | void zfcp_erp_set_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1613 | { |
edaed859 SS |
1614 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1615 | ||
805de8f4 | 1616 | atomic_or(mask, &zfcp_sdev->status); |
d736a27b AH |
1617 | } |
1618 | ||
287ac01a | 1619 | /** |
edaed859 SS |
1620 | * zfcp_erp_clear_lun_status - clear lun status bits |
1621 | * @sdev: SCSi device / lun to clear the status bits | |
1622 | * @mask: status bits to change | |
287ac01a | 1623 | */ |
edaed859 | 1624 | void zfcp_erp_clear_lun_status(struct scsi_device *sdev, u32 mask) |
d736a27b | 1625 | { |
edaed859 SS |
1626 | struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(sdev); |
1627 | ||
805de8f4 | 1628 | atomic_andnot(mask, &zfcp_sdev->status); |
edaed859 SS |
1629 | |
1630 | if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) | |
1631 | atomic_set(&zfcp_sdev->erp_counter, 0); | |
d736a27b | 1632 | } |
edaed859 | 1633 |